diff --git a/data/json/DLP/355909.json b/data/json/DLP/355909.json new file mode 100644 index 0000000000000000000000000000000000000000..3bc45b760c1c20caef2d6cd6bf68775ee5eacd84 --- /dev/null +++ b/data/json/DLP/355909.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "355909", + "reporterName" : "RE", + "rankPoints" : "21045", + "resolutionStatus" : "", + "ticketName" : "[FAQ] I want to use Hall Effect Sensors - where do I start?", + "rankName" : "Mastermind", + "replies" : " 1", + "views" : " 13831", + "queryText" : "I need contactless position measurement, angle measurements, switching and latching digital outputs with magnets. How do I choose a part? How do I choose a magnet? Help me get started!", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "2664186", + "userName" : "Mitch M", + "rankPoints" : "4825", + "rankName" : "Expert", + "date" : "Aug 24, 2018 9:10 PM", + "userId" : "4910879", + "content" : "This E2E forum is the place to ask TI's experts questions about Hall Sensors: Latches: DRV5011, DRV5012, DRV5013, DRV5015 Automotive: DRV5013-Q1, DRV5015-Q1 Switches: DRV5021, DRV5023, DRV5032, DRV5033 Automotive: DRV5021-Q1, DRV5023-Q1, DRV5033-Q1 Linear: DRV5053, DRV5055, DRV5056, DRV5057 Automotive: DRV5053-Q1, DRV5055-Q1, DRV5056-Q1 _____________________________________________________ Videos: Getting Started with Hall Effect Sensors Jump start your Hall effect sensor expertise _____________________________________________________ Blogs: Center stage with Hall sensors Rediscover the Hall sensor Measuring wheels in motion Hall Effect sensor bandwidth in BLDC motors Meter anti-tampering _____________________________________________________ White Papers: Achieve greater precision, reliability with magnetic sensing technology Sub-Microamp, Intelligent Hall-Effect Sensing Delivers 20-Year Battery Life _____________________________________________________ Tech Notes & Application Reports: Linear Hall Effect Sensor Angle Measurement Theory, Implementation, and Calibration Understanding & Applying Hall Effect Sensor Datasheets Power Gating Systems with Magnetic Sensors Sensored 3-Phase BLDC Motor Control Using MSP430 Incremental Rotary Encoder Design Considerations _____________________________________________________ Evaluation Modules: DRV5032-SOLAR-EVM HALL-ADAPTER-EVM DRV5055-ANGLE-EVM DRV5055EVM DRV5055-5057EVM DRV5011-5012EVM _____________________________________________________ Calculators & Design Tools: CAD files for DBZ (.bxl and Altium files) Online magnetic field calculator _____________________________________________________company Reference Designs with Hall sensors: Ultra-low Power Fault Monitoring for Overhead Power Lines Sunroof Motor Module Wireless Low-Power Window Sensor Automotive 48V 1kW Motor Drive Automotive 12V 200W (20A) BLDC Motor Magnetic Tamper Detection using Low-Power Hall Effect Sensors Speed-Controlled 24V Brushless DC Outrunner Motor 12V and 24V Brushless DC Outrunner Motor Incremental Rotary Encoder 3D Printer Controller (12V) Foot Controller Reference Design using Analog Hall Sensor Contactless AC-Current Sensing Current Controlled Driver for 24V DC Solenoid Current Controlled Driver for 230V AC Solenoids Hall-Effect Proximity Sensor with PNP or NPN Output Variable threshold Hall proximity Sensor with PNP/NPN Proximity and Temperature Multi-Variable Transmitter Hall Sensor Proximity Sensor w/Fixed Threshold and Temp Sensing Refrigerator Fan drive control Single Phase BLDC with Brushed Motor Driver _____________________________________________________ Various Magnet suppliers: http://www.acm-magnetics.com http://www.sgtec.com http://www.ysm-magnet.com http://www.nbvsmagnetic.com http://www.magmamagnets.com http://www.adamsmagnetic.com http://www.kjmagnetics.com http://www.magnete.de http://www.thyssenkrupp-magnettechnik.com http://www.mceproducts.com _____________________________________________________ last updated 8/24/2018" + } ], + "tags" : [ "/support/sensors/f/1023/tags/DRV5032", "/support/sensors/f/1023/tags/DRV5033", "/support/sensors/f/1023/tags/DRV5053", "/support/sensors/f/1023/tags/DRV5023_2D00_Q1", "/support/sensors/f/1023/tags/DRV5053_2D00_Q1", "/support/sensors/f/1023/tags/DRV5033_2D00_Q1", "/support/sensors/f/1023/tags/DRV5055_2D00_Q1", "/support/sensors/f/1023/tags/DRV5013_2D00_Q1", "/support/sensors/f/1023/tags/HALL_2D00_ADAPTER_2D00_EVM", "/support/sensors/f/1023/tags/DRV5032_2D00_SOLAR_2D00_EVM", "/support/sensors/f/1023/tags/DRV5012", "/support/sensors/f/1023/tags/DRV5013", "/support/sensors/f/1023/tags/DRV5023", "/support/sensors/f/1023/tags/DRV5011" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/748143.json b/data/json/DLP/748143.json new file mode 100644 index 0000000000000000000000000000000000000000..fdcb13183b82d339dc31b5dc7150eaf4f4aefb88 --- /dev/null +++ b/data/json/DLP/748143.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "748143", + "reporterName" : "Akeem Whitehead", + "rankPoints" : "21215", + "resolutionStatus" : "Resolved", + "ticketName" : "[FAQ] Ultrasonic Sensors", + "rankName" : "Mastermind", + "replies" : " 1", + "views" : " 7530", + "queryText" : "Ultrasonic sensing uses the propagating sound waves at a frequency above the range of human hearing (>20kHz) that can travel through a wide variety of mediums (air, fluid, or solid) to detect objects, measure distance, or track disturbances. Ultrasonic sensors can be used to detect a wide variety of materials regardless of shape, transparency, or color. For an overview on ultrasonic sensing fundamentals,company recommends you begin by reading the Ultrasonic Sensing Basics application note.company offers a variety of ultrasonic sensing ICs. The objective of this FAQ is to help recommend a specificcompany ultrasonic sensing device based on the application use-case and system requirements. Ultrasonic Sensing Application Measure Distance and Proximity Measure Level or Height of Liquid or Solid Measure Flow Rate and Direction of Liquid, Gas, or Heat Measure Concentration and Material Identification Object Tracking and Mapping Material Thickness and Flaw Detection Monitor Changes to Environment Description Use a single sensor to both generate and capture a round-trip time-of-flight echo to measure the distance between the sensor and the targeted object. Use a single sensor to both generate and capture a round-trip time-of-flight echo to measure the distance between the sensor and the targeted object. Use two sensors to capture the difference of transit time propagating in and against the flow direction as an independent upstream and downstream measurement. Use a single sensor to both generate and capture a round-trip time-of-flight echo to measure the changes in the speed of sound based on a fixed-known distance. Use at least two transducers with a fixed-known distance between on another. One transducer must always be used to generate and capture a round-trip time-of-flight echo, while the other transducers must only capture the round-trip time-of-flight echo. By comparing the resulting time of flight differences through triangulation. Use a single sensor to both generate and capture a round-trip time-of-flight to measure the thickness of a solid object, and determine if there are any voids within the solid. The transducer face must be made to couple to the solid material type for direct transducer to solid contact. Use two transducers, one to continuously generate the ultrasonic echo, and the other to continuously capture the difference in return echo zero-crossing frequency (Doppler shift).company Top Device Pick PGA460 TUSS4470 MSP430FR6047 TUSS4470 TUSS4470 TUSS4440 TUSS4470 Why Top Pick The PGA460 was designed specifically to measure distance using ultrasonic time-of-flight. The integrated driver, receiver, ADC, and digital signal processing logic simplifies the steps required to capture this time-of-flight data. The TUSS4470 supports the widest range of transducer frequencies from 30kHz to 1MHz to measure height from the top pointed down through air, or from the bottom pointed up through liquid. The customer organization MSP430FR604x and MSP430FR603x family of ultrasonic sensing and measurement SoCs are powerful, highly integrated microcontrollers (MCUs) that are optimized for water and heat meters. The TUSS4470 supports the widest range of transducer frequencies from 30kHz to 1MHz to properly couple the transducer and enable this measurement through nearly all gases, liquids, or solids. Multiple TUSS4470 devices can be easily synchronized due to the device’s ability to independently enable the receiver path regardless of the driver block’s state. This means the start of the pulse generation can be used as the sole time-of-flight origin reference for all devices. To propagate sound waves through a solid, a large amount of sound pressure must be generated by using a transformer driver. The TUSS4440 is able to generate hundreds of volts to excite transducer, while normalizing the time-of-flight echo response regardless of the flaw dimensions. The TUSS4470’s built-in zero-crossing feature allows the receiver to continuously monitor the incoming echo frequency. If the object is approaching the sensor, the zero-crossing frequency will increase, while an object leaving will cause the zero-crossing frequency to decease. Recommended Evaluation Tool BOOSTXL-PGA460 BOOSTXL-TUSS4470 EVM430-FR6047 BOOSTXL-TUSS4470 BOOSTXL-TUSS4470 BOOSTXL-TUSS4440 BOOSTXL-TUSS4470 Notes Enable near 0mm detection by using a bi-static transducer pair for a separate transducer to generate the echo, and another transducer to capture the round-trip time-of-flight. For top-down level sensing, use lower frequency transducers. For bottom-up level sensing, use higher frequency transducers.company no longer recommends using the TDC1000 for flow rate application due to known stability and accuracy issues of the device’s STOP pulse generation. Enable one-way measurements by using a bi-static transducer pair facing each other for a separate transducer to generate the echo, and another transducer to capture the one-way time-of-flight As transducers are added to the receiver array, the accuracy and addition details of the object to be tracked or mapped are increased. It is important to use a contact transducer acoustic matched to the solid you are measuring the thickness of. Improper transducer face type or poor mounting will result in invalid results. Monitoring the Doppler shift of the return echo is one method of seeking changes to the environment. Capturing the echo envelope over time per time-of-flight measurement is another way to monitor environmental changes by comparing the latest record cycle to the previous record cycle.company Ultrasonic Sensing IC Device Comparison: TUSS4470 TUSS4440 PGA460 MSP430FR6047 TDC1011 / TDC1000 Device type Analog front-end Analog front-end Analog front-end + digital signal processor (integrated) Analog front-end + digital signal processor (integrated) Analog front-end Supported transducer frequencies 40 kHz – 1 MHz 40 – 440 kHz (pre-drive) 40 – 500 kHz 30 – 80 kHz & 180 – 480 kHz 50 kHz – 2.5 MHz 31.25 kHz – 4 MHz Channel count 1 Channel 1 Channel 1 Channel 2 Channel TDC1011: 1 Channel TDC1000: 2 Channel Drive topology - Direct drive (max 36 V) - Pre-drive Transformer drive - Transformer drive - Direct drive with added FETs Direct drive (max 3.3V) Direct drive (max 5V) Gain stage 86 dB logarithmic amplifier 86 dB logarithmic amplifier 6 point time-varying gain (32 to 90 dB) Fixed gain (6.5 to 30.8 dB) Fixed gain (20 to 41 dB) Outputs - Analog echo envelope - Zero crossing - Envelope threshold detect - Analog echo envelope - Zero crossing - Envelope threshold detect - DSP processed output (time-of-flight, amplitude, width) - Echo data dump (down-sampled echo envelope) - Raw digital data path (ADC, bandpass filter, rectifier, lowpass filter) - Flow rate - DSP processed output (time-of-flight) - Zero crossing - Echo start and stop pulse Temperature sensor No No On-chip temperature sensor On-chip temperature sensor Interface to RTD Diagnostics SPI diagnostics SPI diagnostics - System diagnostics (frequency, decay, excitation voltage) - Supply diagnostics (overvoltage) Programmable None Automotive qualified device N/A N/A PGA460-Q1 N/A TDC1011-Q1 TDC1000-Q1 Output interface - SPI for programming - Analog output - SPI for programming - Analog output - USART (UART + SPI) - OWU - TCI - UART - I2C - SPI SPI The following collateral will be available on E2E until officially released to the product page: TUSS44x0 E2E Content: BOOST-TUSS44x0 EVM-GUI Overview and Quick Start Video: Ultrasonic FAQ Archives: PGA460: /support/sensors/f/1023/t/640810 TDC1000: /support/sensors/f/1023/t/724028 TDC1000 no longer recommended for accurate flow metering. Please consider using the TUSS4470 as an alternative to the TDC1000 for all ultrasonic applications.", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "2762873", + "userName" : "Akeem Whitehead", + "rankPoints" : "21215", + "rankName" : "Mastermind", + "date" : "Nov 19, 2018 10:04 PM", + "userId" : "3766999", + "content" : "If you have any questions regarding this post or its linked content, start a new E2E discussion or thread." + } ], + "tags" : [ "/support/sensors/f/1023/tags/BOOSTXL_2D00_TUSS4440", "/support/sensors/f/1023/tags/PGA460%2b%2bMSP430FR6047", "/support/sensors/f/1023/tags/EVM430_2D00_FR6047", "/support/sensors/f/1023/tags/BOOST_2D00_TUSS4440", "/support/sensors/f/1023/tags/ultrasonic", "/support/sensors/f/1023/tags/TDC1011", "/support/sensors/f/1023/tags/BOOST_2D00_TUSS4470", "/support/sensors/f/1023/tags/TUSS4440", "/support/sensors/f/1023/tags/TUSS4470", "/support/sensors/f/1023/tags/TDC1011_2D00_Q1", "/support/sensors/f/1023/tags/USSC", "/support/sensors/f/1023/tags/PGA460", "/support/sensors/f/1023/tags/MSP430FR6047", "/support/sensors/f/1023/tags/TDC1000", "/support/sensors/f/1023/tags/PGA460_2D00_Q1", "/support/sensors/f/1023/tags/TDC1000_2D00_Q1", "/support/sensors/f/1023/tags/BOOSTXL_2D00_TUSS4470", "/support/sensors/f/1023/tags/TUSS", "/support/sensors/f/1023/tags/BOOSTXL_2D00_PGA460", "/support/sensors/f/1023/tags/time_2D00_of_2D00_flight", "/support/sensors/f/1023/tags/energia" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/753020.json b/data/json/DLP/753020.json new file mode 100644 index 0000000000000000000000000000000000000000..0bdce62afdbcd76f0276b560ea530803946a81d5 --- /dev/null +++ b/data/json/DLP/753020.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "753020", + "reporterName" : "Bill Johns", + "rankPoints" : "46985", + "resolutionStatus" : "Resolved", + "ticketName" : "[FAQ] BQ24040 and BQ2404X family Charge Complete Pin Behavior, /CHG", + "rankName" : "Mastermind", + "replies" : " 1", + "views" : " 2396", + "queryText" : "The BQ2404X family of charger has a charge complete pin, /CHG to indicate charge in progress or complete. But under some conditions the battery charge has stopped (no current to battery) but /CHG indicates charge. In other case the battery is charging (current to battery) but /CHG does not indicate charge in progress.", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "2781522", + "userName" : "Bill Johns", + "rankPoints" : "46985", + "rankName" : "Mastermind", + "date" : "Dec 5, 2018 10:34 PM", + "userId" : "244698", + "content" : "This also applies to BQ21040, BQ24050, BQ24090 and BQ25100 family of devices. The /CHRG pin in an open drain output used to indicate that a battery charge cycle is in progress. The pin will go low when the device detects a valid power supply and starts charging the battery. The pin will go high impedance when the device detects that the battery is fully charged (Change Complete/ Termination). In order to optimize end user experience the charger behavior under the particular cases below is as follows: 1.) If TS (NTC) pin indicates an over temp condition charge is suspended, but the /CHG pin will remain low since termination or charge complete has not been detected. Charge will resume when temp is reduced and the /CHG pin will remain low. 2.) The BQ2404X will automatically restart charge if after termination/charge complete the battery voltage drops to Recharge (V-RCH). This is done to maintain the battery fully charged. In this case the /CHG pin will remain high-Z after termination even if the recharge has started. 3.) During OVP shutdown or Charge Timer Fault /CHG is high –Z Note on First Charge Cycle-- will start when power is applied, disable / enable using TS pin or detect battery insertion, /CHG is low. Start charge cycle but not First charge cycle exiting TTDM mode or battery voltage below V-RCH. Additional info see BQ24040 Data Sheet Charge Complete Data Sheet section 8.3.7 also see Table in section 8.4.1. Note -- Updated section 2 May 20, 2019 -- To remain high-Z" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24040" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/762756.json b/data/json/DLP/762756.json new file mode 100644 index 0000000000000000000000000000000000000000..85f7b8ab8d37f4c83fc430bef7e5aecc12761768 --- /dev/null +++ b/data/json/DLP/762756.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "762756", + "reporterName" : "Bill Johns", + "rankPoints" : "46985", + "resolutionStatus" : "Resolved", + "ticketName" : "[FAQ] BQ24040 and BQ2404X family TS pin configuration of NTC and TTDM mode", + "rankName" : "Mastermind", + "replies" : " 1", + "views" : " 2731", + "queryText" : "The TS pin has multiple ways that it can be configured. What is the best way to connect it and how?", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "2819315", + "userName" : "Bill Johns", + "rankPoints" : "46985", + "rankName" : "Mastermind", + "date" : "Jan 14, 2019 3:52 PM", + "userId" : "244698", + "content" : "Hello This also applies to BQ21040, BQ24050 and BQ24090 family of devices. The TS pin options and configurations, the best arrangement will depend on the system requirements. Below is a summary of the modes and configurations. Normal battery Charge -- Connected to NTC thermistor in battery pack to monitor battery temp. 50uA current source will develop a voltage that is monitored by internal voltage comparators. Charge is suspended above 1230mV and below 178mV. If NTC is not used a 10k resistor will enable normal operation. Shutdown – Pull TS pin low to will disable charge. Termination and Timer Disable Mode (TTDM) – Float or drive high to enter TTDM. This mode is similar to a power supply mode. After charge is complete the voltage will remain applied to battery. TTDM Disable – Connect a 237k resistor to ground to disable the TTDM mode. Intended for battery pack removed and TTDM mode in not needed. In this condition charge is suspended and no voltage present. The typical configuration is to connect an NTC / 10k resistor to TS. If the battery pack is removable then TTDM mode to power the device is an option. For additional information see section 8.4.8 and 8.4.9 in data sheet." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24040" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/763227.json b/data/json/DLP/763227.json new file mode 100644 index 0000000000000000000000000000000000000000..af647b9f57fd1b39913c105abcceee3e9193852f --- /dev/null +++ b/data/json/DLP/763227.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "763227", + "reporterName" : "Bill Johns", + "rankPoints" : "46985", + "resolutionStatus" : "Resolved", + "ticketName" : "[FAQ] BQ24040 and BQ2404X family Trouble Shooting Tips, No Output, Charge Current Low, Early Termination and Others.", + "rankName" : "Mastermind", + "replies" : " 1", + "views" : " 3987", + "queryText" : "What are some trouble shooting recommendation if we are seeing problems with the BQ24040 or similar devices.", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "2821311", + "userName" : "Bill Johns", + "rankPoints" : "46985", + "rankName" : "Mastermind", + "date" : "Jan 15, 2019 9:25 PM", + "userId" : "244698", + "content" : "This also applies to BQ21040, BQ24050 and BQ24090 family of devices. Some Trouble Shooting tip for the device family If the device does not start charge, no current to battery check: TS pin voltage needs to be between 278mV and 790mV for normal operation Check that input voltage is below OVP, 6.6V. Double check ISET and PRETERM resistors, low charge current could cause problems. Charge will start but current to battery is low of target: TS pin voltage needs to be in the normal range. At low temp half charge will reduce current TS between 790mV and 1230mV ISET2 pin, Float will limit current to 100mA Input voltage low, need 700mV to 1000mV drop across the device for full output current. Internal thermal limit, if the die temp reaches 125C output current is reduced to control thermal rise. The Charge May Terminate Early or at lower voltage: TS pin voltage needs to be in normal range. At hot temp charge voltage is reduce to 4.06V TS between 278mV and 178mV. Resistance between the battery and charger will increase voltage at BAT terminal and appear as higher battery voltage. Also: Battery or battery simulator required for test standard load will not work. CHG and PG pin will give some insight into condition of device. Check the voltage at ISET, it should be proportional to output current reduced by 400. Iout/400 * R-ISET. Voltage at ISET represents output current and voltage at PRETERM represents termination point. Battery voltage for normal charge current needs to be between 2.5V and 4.1V. Below or above and current is reduced." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24040" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/787791.json b/data/json/DLP/787791.json new file mode 100644 index 0000000000000000000000000000000000000000..d4913f2baf32be9554676bde05981cf0d726635a --- /dev/null +++ b/data/json/DLP/787791.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "787791", + "reporterName" : "Bill Johns", + "rankPoints" : "46985", + "resolutionStatus" : "Resolved", + "ticketName" : "[FAQ] BQ24040: BQ2404X Family Devices Schematic and Layout Review", + "rankName" : "Mastermind", + "replies" : " 1", + "views" : " 3375", + "queryText" : "Part Number: BQ24040 Hello Team I have completed my design and layout can someone review it for me?", + "partNumber" : " BQ24040", + "allResponseList" : [ { + "contentId" : "2913174", + "userName" : "Bill Johns", + "rankPoints" : "46985", + "rankName" : "Mastermind", + "date" : "Mar 29, 2019 6:36 AM", + "userId" : "244698", + "content" : "BQ24040 and BQ2404X family Checklist for Schematic and Layout Review. This also applies to BQ21040, BQ24050 and BQ24090 family of devices. Below items are good points to check during schematic and layout review for device. Note that some points may not apply to your specific device. Schematic / Layout: Pin 1 – IN, input filter capacitor 1uF to 10uF range required. Locate close to the device. Should be ceramic (MLCC) with good high frequency response. Voltage on the input may have a wide range size to match possible voltage range. Pin 2 – ISET, Resistor to ground to set output current should be located near the device with good return back to thermal pad. Pin 3 – VSS, Ground to thermal pad Pin 4 – PRETERM, Resistor to ground to set pre-charge and termination current should be located near the device with good return back to thermal pad. Pin 5 -- /PG, Open collector output pull up required. OK to float if not used. Pin 6 – NC (No Connect) – Open Pin 7 – ISET2, USB100/500 select pin pull high, low or float. Pin 8 -- /CHG, Open collector output pull up required. OK to float if not used. Pin 9 – TS, Connect to NTC resistor in battery pack or on board to limit temperature range of charge. Ground with 10k if not used. Note if used with removable battery pack protection from ESD or additional filtering is recommended. Pin 10 -- OUT, output filter capacitor 1uF to 10uF range required. Locate close to the device. Should be ceramic (MLCC) with good high frequency response. Voltage will be regulated to 4.2V lower voltage rating than input can be used. Thermal Pad – Linear regulators can have high power dissipation. Connect to thermal plane with mult vias. Power dissipation on ISET and PRETERM resistor is very low and can be small package. Also see layout section of Data Sheet, section 11." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24040" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/815766.json b/data/json/DLP/815766.json new file mode 100644 index 0000000000000000000000000000000000000000..a67a2771e8fdfae2f584269b6cec07e1cc920a7a --- /dev/null +++ b/data/json/DLP/815766.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "815766", + "reporterName" : "Alex Bhandari-Young", + "rankPoints" : "15670", + "resolutionStatus" : "Resolved", + "ticketName" : "[FAQ] OPT3101: What are the resourcescompany provides for developing with OPT3101?", + "rankName" : "Genius", + "replies" : " 1", + "views" : " 3447", + "queryText" : "Part Number: OPT3101", + "partNumber" : " OPT3101", + "allResponseList" : [ { + "contentId" : "3019009", + "userName" : "Alex Bhandari-Young", + "rankPoints" : "15670", + "rankName" : "Genius", + "date" : "Jun 28, 2019 7:47 PM", + "userId" : "4691324", + "content" : "Getting started Training videos: /zero-hero-time-flight-training-series Device datasheet: /lit/ds/symlink/opt3101.pdf Evaluation OPT3101EVM is available here: /tool/OPT3101EVM Device is pre-calibrated and ready for use. EVM demonstrates using OPT3101 for long range single channel ToF distance measurements. TIDA010021 is a reference design demonstrating OPT3101 used for wide field-of-view with multiple zones of detection. It is available here: /tool/TIDA-010021 System level design (component selection and board design) System design involves optical component selection and board design and layout. The system design guide provides all the necessary theory and instructions for this process. The estimator tool helps with selecting optical emitters and photodiodes and estimating performance, range, and accuracy for these components. system design guide: /lit/ug/sbau305b/sbau305b.pdf system estimator tool: /tool/OPT3101ESTIMATOR-SW Calibration Tools The SDK tool provides all C++ functions needed for calibration. This can be integrated to an existing system or run on any host with C++ compiler (microprocessor, linux PC, windows, etc.). It can also be used in calibration tool mode on acompany MSP430 launchpad to speed calibration process which requires no coding and simply commenting a line of code per calibration step and compiling the code in Code Composer Studio. Details of this method are run through step-by-step in the SDK user guide document included in the SDK. SDK: /tool/OPT3101-SDK The configurator tool is a graphical interface for selecting the OPT3101 settings to use for the design. It generates an SDK configuration file with register settings that can be imported to the SDK and eliminates the need to select individual register settings. Configurator tool: /tool/OPT3101CONFIG-SW Documents How to calibrate doc: /lit/pdf/slau791 Register level calibration doc: /lit/pdf/sbau310 App notes We have a number of app notes that give more details on a variety of topics. These are available here: /product/OPT3101/technicaldocuments#doctype1 Overview of collateral /product/OPT3101#design-resources-for-you" + } ], + "tags" : [ "/support/sensors/f/1023/tags/OPT3101" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/816332.json b/data/json/DLP/816332.json new file mode 100644 index 0000000000000000000000000000000000000000..911e4d68bbf9299b8f76047cafb620a359e4d657 --- /dev/null +++ b/data/json/DLP/816332.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "816332", + "reporterName" : "Akash Gondalia", + "rankPoints" : "39385", + "resolutionStatus" : "Resolved", + "ticketName" : "[FAQ] IWR6843 Antenna-on-Package (AoP) Frequently Asked Questions", + "rankName" : "Mastermind", + "replies" : " 2", + "views" : " 4941", + "queryText" : "Hello Everyone, Please see the below Frequently Asked Questions on the IWR6843 AoP Device and IWR6843AOPEVM. Cheers, Akash", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3022091", + "userName" : "Nitin Sakhuja", + "rankPoints" : "21725", + "rankName" : "Mastermind", + "date" : "Jul 2, 2019 3:23 PM", + "userId" : "1602842", + "content" : "Thanks for the information. -Nitin" + }, { + "contentId" : "3233422", + "userName" : "Akash Gondalia", + "rankPoints" : "39385", + "rankName" : "Mastermind", + "date" : "Jan 20, 2020 7:27 PM", + "userId" : "4768107", + "content" : "Frequently Asked Questions on the IWR6843AoPEVM: Antenna Questions: Q: How deep in the chip is the antenna located (in order to find proper distance for cover placement)? Is there any material interface (through which waves are passing) on the top of the chip that should be taken in account? A: Antenna is located on the Top side of the Package itself. There is no material interface, Antennas are located on the top surface of the package. Hence for the distance measurement you could consider top side of the package. Q: Is it possible to place cover directly in contact with the chip front? Or should there be at least half wavelength gap? A: It's recommended to keep at-least multiple of half wavelength distance. Please refer to this app-note section 5. Q: How does Angular Resolution compare from AoP to ISK antenna? A: IWR6843AOP has different antenna configuration, hence it has equal angular resolution both in Azimuth and Elevation direction. Q: What is the antenna pattern for IWR6843AoPEVM? A: Rx Pattern: Tx Pattern: Q: What is the arrangement of Transmitters and Receivers on IWR6843AOPEVM? Below diagram has the antenna placement and positions of virtual Antenna pairs. Schematics: Q: Are schematics of the IWR6843AOPEVM available? A: Yes they are! You can find schematic, assembly, and BOM on the IWR6843AOP Landing Page under the Design Files Section. Visualizer Error: Q: When I am trying to connect send config to mmWave device, then it is showing an error \"Selected Platform [xWR68xx_AOP] not matching that reported by target [xWR68xx]\". A: This error occurs when the AoP EVM has been flashed with binaries from the Non-AoP SDK. You should instead flash the EVM with 64xx_AoP binary from the appropriate AoP SDK. EVM Questions: Q: Do I need to purchase an MMWAVEICBOOST Carrier card with my AoP EVM? A: The MMWAVEICBOOST is highly recommend for development and debug purposes. The board provides debug, raw data capture connectivity, SPI and interface to the antenna board peripherals etc. whereas in standalone mode you have access to UART, you can flash the EVM and get data out of the UART port. Q: Is Heat Sink necessary for IWR6843AoPEVM? A: Heat sink is not a mandatory requirement for the EVM. However, EVM comes with the example heat sink option for the EVM, Heat sink helps in reducing the junction temperature. Below curve shows duty-cycle vs temperature in deg centigrade. There are four curves two of them shows temperature difference with and without heat sink options. Other two curves are best fit linear trend lines for the with and without heat sink options. Below graph is specific example of heat sink and customers could choose to design their own heat sink depending upon their application needs. Also customers could choose to operate different duty-cycle options depending upon the application requirements.care need to be taken not to exceed the junction temperature beyond 105 deg C. Q: What other boards do I need to use IWR6843AoPEVM AoPEVM could be used standalone configuration, in this case one could flash the EVM and run demo applications. Extended section of the EVM allows connectivity to other chipsets such as Bluetooth, 9-Axis sensor, LCD interfaces. Note that some of these components are not pre-mounted along with the EVM, customer need to mount these components. 60Pin connector on the back side of the board allows connectivity to MMWAVEICBOOST from which customers could connect to XDS110 interface/14 pin/60 pin MIPI connector for JTAG and other advanced debugging options. With the help of Carrier board (MMWAVEICBOOST, DCA1000 and IWR6843AoPEVM) raw ADC data could be captured using mmWave studio application. For more details please refer to EVM user-guide. Q: How can I use the break out board part of the IWR6843AoPEVM and implications? EVM is designed for form-factor usage, Customers could choose to breakout section to separate the EVMs into two pieces. Once EVMs are separated it cannot be joined together. After the break-away EVM module would be 23 x 22 mm size. This section offers one USB connector and slide switch for flashing mode and default functional mode options. Care need to be taken on the thermal heat dissipation, at higher duty-cycle heat sink option need to be considered so that junction temperature should not exeeded 105 deg C. Q: What Demos are available for IWR6843AoPEVM ? The following demos are available for IWR6843AOPEVM MMWAVE SDK Demo - 68xx AOP 68xx - Area Scanner ROS Point Cloud Visualizer Autonomous Robotics with ROS for mmWave Multiple Gesture and Motion Detection Lab - 68xx Q: Can I run IWR6843ISK code on IWR6843AoPEVM ? How? Compared to the IWR6843ISK, the IWR6843AOPEVM has a different antenna design and this requires modifications to the angle of arrival computation corresponding to the IWR6843AOPEVM virtual antenna array. To develop basic understanding of virtual antenna arrays and angle of arrival estimation concepts, refer to the following resources mmWave Training Series training video: Intro to mmWave Sensing – Angle Estimation MIMO Radar app note The IWR6843AOPEVM is supported by mmWave SDK 3.2.0.x_AOP which provides the 2D AoA DPU (Data Processing Unit) for angle of arrival estimation on the AOP device. This AoA technique is not supported in mmWave SDK 3.2.0.x for IWR6843ISK so the user will need to modify/replace the angle of arrival code in the ISK based application according to the AoA technique demonstrated in the 2D AoA DPU used in the IWR6843AOP out of box demo. Please refer to the following documentation resources included in mmWave SDK 3.2.0.x_AOP to understand the IWR6843AOP out of box demo and the 2D AoA technique. MMWAVE-SDK 3.2.0.6 Module Documentation. AOP Out of box demo: xwr64xx mmw Demo (for IWR6xxx ISK and AOP platforms) 2D AoA DPU: AoA (angle of arrival) using 2D FFT method" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR6843", "/support/sensors/f/1023/tags/MMWAVE_2D00_SDK", "/support/sensors/f/1023/tags/IWR6843AOPEVM", "/support/sensors/f/1023/tags/IWR6843ISK", "/support/sensors/f/1023/tags/MMWAVEICBOOST" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/837889.json b/data/json/DLP/837889.json new file mode 100644 index 0000000000000000000000000000000000000000..58a20cf30108d9f91f532767a2725d94e9d9c1f6 --- /dev/null +++ b/data/json/DLP/837889.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "837889", + "reporterName" : "Charles-Chen", + "rankPoints" : "5435", + "resolutionStatus" : "Resolved", + "ticketName" : "[FAQ] CCS/LP5036: How to master LP50xx device within five minutes? Please provide the quick start guide of LP5009, LP5012, LP5018, LP5024, LP5030, LP5036 device.", + "rankName" : "Expert", + "replies" : " 2", + "views" : " 2800", + "queryText" : "Part Number: LP5036 Tool/software: Code Composer Studio Q1: What’s the right direction when USB2ANY module is connected to the LP50xx EVM? Q2: What is the purpose of color mixing? Is it similar with brightness control? Why there is no individual brightness control for each output channel? Q3: How to achieve a user-defined dynamic lighting pattern with LP50xx device? Q4: How to control the color temperature of RGB- LEDs using LP50xx device? Q5: How to estimate the junction temperatures of LP50xx device?", + "partNumber" : " LP5036", + "allResponseList" : [ { + "contentId" : "3098584", + "userName" : "Charles-Chen", + "rankPoints" : "5435", + "rankName" : "Expert", + "date" : "Sep 10, 2019 12:56 PM", + "userId" : "6102657", + "content" : "Q1: What’s the right direction when USB2ANY module is connected to the LP50xx EVM? Fig.1 shows the right direction when the USB2ANY module is connected to the LP50xx EVM. Please pay attention to the part marked in the blue block. For more details concerning hardware setup of LP50xx EVM, please refer to the corresponding user’s guide. I provide a link here to download the user’s guide of LP5024. Fig.1 Q2: What is the purpose of color mixing? Is it similar with brightness control? Why there is no individual brightness control for each output channel? Color-mixing means that different color can be decomposed of different proportions of RGB. You can configure the proportions of RGB to get desired colors. The proportions of RGB are controlled by configuring the brightness of each R,G and B LEDs. The PWM duty ratio control is related to the brightness of each channel. As shown in Fig.2, PWM duty cycle is defined as the product obtained by multiplying the color-mixing register value (Outx_color) by the related intensity-control register value (LEDx_Brightness). Actually brightness of each output channel can be controlled by the register OUTx_Color individually. However, the value of OUTx_Color will affect the proportions of RGB. When color is fixed, the independent intensity control (LEDx_Brightness) is used to achieve accurate and flexible dimming control for every RGB LED module. Besides, OUTx_Color register can be used to adjust the brightness independently for single color LEDs. Fig.2 Q3: How to make a user-defined dynamic lighting pattern with LP50xx device? Can you provide the sample code and Linux driver? Actually, you have two choices to achieve user-defined dynamic lighting pattern with LP50xx device. Choice A: You can use micro controller, such as MCU or DSP, to control the LP50XX to achieve a user-defined dynamic lighting pattern. I provide the links here to download the sample code and Linux driver. Choice B: You can initialize, set up and play with the LEDs from a C program through USB2ANY SDK. For more details concerning USB2ANY SDK, such as code example, please refer to this thread." + }, { + "contentId" : "3103488", + "userName" : "Charles-Chen", + "rankPoints" : "5435", + "rankName" : "Expert", + "date" : "Sep 15, 2019 7:28 AM", + "userId" : "6102657", + "content" : "Q4: How to control the color temperature of RGB- LEDs using LP50xx device? Fig.3 Let (xi, yi, i=R, G, B) denote the CIE 1931 chromaticity coordinates and (Φi, i=R, G, B) denote the luminous flux of the light emitted by the ith LEDs. (x, y) represents the color coordinates of light synthesized by RGB-LEDs. CCT means correlated color temperature. Since variations of the (xi, yi, i=R, G, B) are relatively small, the CCT synthesized by RGB-LEDs can be expressed as a function of the flux ratios Φi/ ΦB. Hence, you can control the color temperature by adjusting the proportions of RGB by OUTx_color according to the formulas shown in Fig.3. Q5: How to estimate the junction temperatures of LP50xx device? Since there is only a very small percentage of heat energy in a typical plastic package is convected and radiated off the top surface of the package. Hence, if one assumes the entire power is dissipated by the top surface, the junction temperature calculated by RθJC is higher than reality. This limitation of RθJC is overcome by the new thermal metric, ΨJT. ΨJT is recommended to estimate the junction temperatures. For calculation of Pd (power dissipation), please refer to the training video here. For more details about ΨJT, You can refer to the application report of \"Semiconductor and IC Package Thermal Metrics\"." + } ], + "tags" : [ "/support/power-management/f/196/tags/LP5009", "/support/power-management/f/196/tags/LP5024", "/support/power-management/f/196/tags/LP5036", "/support/power-management/f/196/tags/code%2bComposer%2bstudio", "/support/power-management/f/196/tags/usb2any", "/support/power-management/f/196/tags/LP5030", "/support/power-management/f/196/tags/LP5018", "/support/power-management/f/196/tags/LP5012" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/871078.json b/data/json/DLP/871078.json new file mode 100644 index 0000000000000000000000000000000000000000..b21baa071feb2721925b5143a78b2dfb12698881 --- /dev/null +++ b/data/json/DLP/871078.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "871078", + "reporterName" : "Joel Hernandez II", + "rankPoints" : "25800", + "resolutionStatus" : "Resolved", + "ticketName" : "[FAQ] BQ25710, BQ25713, BQ25713B, BQ25700A, BQ25703A, BQ25708 - Schematic Review Design Tips", + "rankName" : "Mastermind", + "replies" : " 1", + "views" : " 807", + "queryText" : "The following document shows key considerations when choosing external components for your BQ25710, BQ25713, BQ25713B, BQ25700A, BQ25703A, BQ25708 design, as well as the tradeoffs. The BQ257xx family of devices are 1-4 cell buck-boost charge controllers that require a host via SMBus or I2C to operate. The attached document is a checklist for reviewing the design of this particular family of devices. It details the external component selection and pin connections, as well as minimum requirements for proper operation of the charger. Components are numbered to match the BQ25710EVM and BQ25713EVM reference design schematic component designators. The component selection is details in the following four categories: Required - Absolutely required for proper operation Recommended - Recommended to optimize performance Recommended-DNP - Recommend as a non-populated component footprints to improve performance post-fabrication Optional - Optional componetns Using this information, customer can reduce external components based on their application, as well as use this document to help in assisting with schematic reviews. Regards, Joel H", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3222422", + "userName" : "Joel Hernandez II", + "rankPoints" : "25800", + "rankName" : "Mastermind", + "date" : "Jan 9, 2020 12:09 AM", + "userId" : "4615895", + "content" : "6712.BQ2571X_SchematicChecklist_CalculationTool.pdf" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25700A", "/support/power-management/f/196/tags/review", "/support/power-management/f/196/tags/BQ25713B", "/support/power-management/f/196/tags/4%2bcell", "/support/power-management/f/196/tags/buck%2bboost", "/support/power-management/f/196/tags/schematic", "/support/power-management/f/196/tags/power%2bpath", "/support/power-management/f/196/tags/buck_2D00_boost", "/support/power-management/f/196/tags/BQ25713", "/support/power-management/f/196/tags/BQ25710EVM", "/support/power-management/f/196/tags/BQ25710", "/support/power-management/f/196/tags/BQ25703A", "/support/power-management/f/196/tags/BQ25703AEVM", "/support/power-management/f/196/tags/NVDC", "/support/power-management/f/196/tags/BQ25700AEVM", "/support/power-management/f/196/tags/bq25713EVM", "/support/power-management/f/196/tags/BQ25708" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/872937.json b/data/json/DLP/872937.json new file mode 100644 index 0000000000000000000000000000000000000000..07aeaa0f222cd7fccaf82355650bd542c59ce693 --- /dev/null +++ b/data/json/DLP/872937.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "872937", + "reporterName" : "Brett Colteaux", + "rankPoints" : "1795", + "resolutionStatus" : "Resolved", + "ticketName" : "[FAQ] TPS23882: Is the TPS23882 Type-3 2-pair IEEE 802.3bt (30W/15.4W) compliant? Where can I find TPS23882 passing Sifos conformance test reports to be certain?", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 566", + "queryText" : "Part Number: TPS23882 Is the TPS23882 Type-3 2-pair IEEE 802.3bt (30W/15.4W) compliant? Where can I find TPS23882 passing Sifos conformance test reports to be certain?", + "partNumber" : " TPS23882", + "allResponseList" : [ { + "contentId" : "3229274", + "userName" : "Brett Colteaux", + "rankPoints" : "1795", + "rankName" : "Intellectual", + "date" : "Jan 15, 2020 6:48 PM", + "userId" : "4406190", + "content" : "The TPS23882 is Type-3 2-pair IEEE 802.3bt (30W/15.4W) compliant and has received an interoperability score of 100% on Sifos IEEE 802.3bt 2-pair conformance test suite version 5.1.company has passing Sifos test reports for the TPS23882 under various configurations. The configuration of the TPS23882 when these reports were generated is shown in the table below: Report Name 2-Pair Allocated Power Device Mode of Operation Memory Utilization: ROM or SRAM Version Hardware Required GUI Used for Configuration PSA_report_T3_15W_x82_P5_AUTO.xlsm 15.4W Autonomous ROM TPS23882EVM-008 + BOOST-PSEMTHR8-097 N/A – Autonomous operation resistor for 15.4W ( = 124 kΩ) utilized. PSA_report_T3_30W_x82_P5_AUTO.xlsm 30W Autonomous ROM TPS23882EVM-008 + BOOST-PSEMTHR8-097 N/A - Autonomous operation resistor for 30W ( = 62 kΩ) utilized. PSA_report_T3_15W_x82_P5_ROM.xlsm 15.4W Auto ROM TPS23882EVM-008 + BOOST-PSEMTHR8-097 TPS2388x EVM GUI PSA_report_T3_30W_x82_P5_ROM.xlsm 30W Auto ROM TPS23882EVM-008 + BOOST-PSEMTHR8-097 TPS2388x EVM GUI PSA_report_T3_15W_x82_P5_FWv0x03.xlsm 15.4W Auto SRAM version 0x03 TPS23882EVM-008 + BOOST-PSEMTHR8-097 TPS2388x EVM GUI PSA_report_T3_30W_x82_P5_FWv0x03.xlsm 30W Auto SRAM version 0x03 TPS23882EVM-008 + BOOST-PSEMTHR8-097 TPS2388x EVM GUI PSA_report_T3_15W_P1_x82_FirmPSE_v00.01.33.00.xlsm 15.4W Semi-Auto SRAM version 0x03 FIRMPSEEVM2P-BDL (TPS23882EVM-084 + PSEMCUDAUEVM-082 + PSEMTHR24EVM-081 bundle) TI’s FirmPSE PSE system firmware version 00.01.33.00 PSA_report_T3_30W_P1_x82_FirmPSE_v00.01.33.00.xlsm 30W Semi-Auto SRAM version 0x03 FIRMPSEEVM2P-BDL (TPS23882EVM-084 + PSEMCUDAUEVM-082 + PSEMTHR24EVM-081 bundle) TI’s FirmPSE PSE system firmware version 00.01.33.00 The above mentioned reports can be found in the following zip file for reference: 1212.TPS23882 Sifos Test Reports.zip IEEE 802.3bt Interoperability Note IEEE 802.3bt compliant devices are backwards compatible with IEEE 802.3at and IEEE 802.3af compliant devices. For example, an IEEE 802.3at compliant PD and/or IEEE 802.3af compliant PD will interoperate with an IEEE 802.3bt compliant PSE.company believes it is advantageous to design with IEEE 802.3bt compliant devices moving forward for 4-Pair and 2-Pair operation due to the benefits that the .bt standard offers over previous standards such as the new MPS signature, autoclass, power demotion, and more. Additional Resources Get started on your 2-Pair Ethernet Switch design with TI’s 24-Port (2-pair) power sourcing equipment reference design for multi-port applications and FirmPSE PSE system firmware. For 4-pair Ethernet Switch designs, consider TI’s 24-Port (4-pair) power sourcing equipment reference design for multi-port applications and FirmPSE PSE system firmware. Check out TI’s PoE Training Portal to learn about PoE fundamentals and the new .bt standard. Watch the training video IEEE 802.3btcompany PSE New Features to learn about PSE features introduced in the .bt standard." + } ], + "tags" : [ "/support/power-management/f/196/tags/PoE", "/support/power-management/f/196/tags/interoperability", "/support/power-management/f/196/tags/Sifos", "/support/power-management/f/196/tags/TPS23882", "/support/power-management/f/196/tags/COMPLIANCE" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/875388.json b/data/json/DLP/875388.json new file mode 100644 index 0000000000000000000000000000000000000000..776cf3c5b230d453d00d1cb2681953f472875236 --- /dev/null +++ b/data/json/DLP/875388.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "875388", + "reporterName" : "Ning T", + "rankPoints" : "15365", + "resolutionStatus" : "", + "ticketName" : "[FAQ] BQ24190: BQ2419x/BQ2429x FAQs", + "rankName" : "Genius", + "replies" : " 1", + "views" : " 504", + "queryText" : "Part Number: BQ24190 Please refer to below for BQ2419x/BQ2429x top frequently asked questions. BQ2419x_29x_ FAQ.pdf", + "partNumber" : " BQ24190", + "allResponseList" : [ { + "contentId" : "3238421", + "userName" : "Ning T", + "rankPoints" : "15365", + "rankName" : "Genius", + "date" : "Jan 25, 2020 2:46 AM", + "userId" : "145100", + "content" : "Thanks, Ning." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24296", "/support/power-management/f/196/tags/BQ24295", "/support/power-management/f/196/tags/BQ24298", "/support/power-management/f/196/tags/bq2429x", "/support/power-management/f/196/tags/BQ24192", "/support/power-management/f/196/tags/bq24292i", "/support/power-management/f/196/tags/BQ24190", "/support/power-management/f/196/tags/BQ2419x", "/support/power-management/f/196/tags/bq24297", "/support/power-management/f/196/tags/bq24195" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/879951.json b/data/json/DLP/879951.json new file mode 100644 index 0000000000000000000000000000000000000000..76a9bbfcb800353d7d8de8ca2aa5a55300c6fef6 --- /dev/null +++ b/data/json/DLP/879951.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "879951", + "reporterName" : "Revanth A1", + "rankPoints" : "170", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "PTD08D210W: UCD9248 controled by PTD08D210 problem", + "rankName" : "Prodigy", + "replies" : " 11", + "views" : " 95", + "queryText" : "Part Number: PTD08D210W Hi, I found that PTD08D210 is generating a voltage of 5.9V even when the UCD9248 is not configured. PTD08D210 has two power output and this problem is seen only in one channel, I even erased the UCD Flasmemory and confirmed that no PWM is going to PTD08D210 but still i see 5.9V in one of the channel. Note: My evel board has 4 PTD08D210 which means 8 o/p voltage channels and 2 UCD9248 to control it , out of which in only one channel i have this problem. Is it the problem with the PTD08D210 , it was working fine only suddenly in one day this problem happened.", + "partNumber" : " PTD08D210W", + "allResponseList" : [ { + "contentId" : "3255942", + "userName" : "iAlejandro", + "rankPoints" : "2390", + "rankName" : "Intellectual", + "date" : "Feb 13, 2020 6:44 PM", + "userId" : "5259049", + "content" : "Hi Revanth, If comfortable, can you provide more information about your application? Application conditions: Input and Output voltage, output current? (the device is rated to provide an output range from 0.7 V to 3.6 V) Perhaps we can take a look at your circuit schematic? Thanks, Alejandro" + }, { + "contentId" : "3256424", + "userName" : "Revanth A1", + "rankPoints" : "170", + "rankName" : "Prodigy", + "date" : "Feb 14, 2020 4:59 AM", + "userId" : "5998636", + "content" : "Hi, Alejandro Kindly look into thje attached pdf zc702_Schematic_xtp185_rev1_0.pdfPage 43, U19 The output is rated at 1.5V and 3.3V for this particular PTD in which the 1.5V channel is having the problem" + }, { + "contentId" : "3264169", + "userName" : "iAlejandro", + "rankPoints" : "2390", + "rankName" : "Intellectual", + "date" : "Feb 21, 2020 5:35 PM", + "userId" : "5259049", + "content" : "Hi Revanth, I reviewed your schematic and everything seems okay. You mentioned that it was working before and eventually something happened; Can you tell me more details about that? Did it involve updating anything on the UCD? Regards, Alejandro" + }, { + "contentId" : "3264611", + "userName" : "Revanth A1", + "rankPoints" : "170", + "rankName" : "Prodigy", + "date" : "Feb 22, 2020 9:50 AM", + "userId" : "5998636", + "content" : "Hi, Alejandro One sudden day we noticed our DDR Not working, then when we checked the voltage going to DDR section from PTD it was 2.5 V instead of 1.5 V, then when we isolated the DDR , WE found that the voltage from PTD IS 5.6 V half of the input voltage to PTD AND UCD., We earsed the UCD Flash memory to and even when no PWM IS going to PTD it generates 5.9 V. I just thinking to change the PTD and see." + }, { + "contentId" : "3268794", + "userName" : "Jimmy Hua", + "rankPoints" : "17640", + "rankName" : "Genius", + "date" : "Feb 27, 2020 12:28 AM", + "userId" : "4798049", + "content" : "Hi Revanth, Is there an update on this? If you were to swap out the PTD08D210 for a new one, does the problem still occur? How many of these failures have you seen occur in your application? Regards, Jimmy" + }, { + "contentId" : "3271366", + "userName" : "Revanth A1", + "rankPoints" : "170", + "rankName" : "Prodigy", + "date" : "Feb 29, 2020 4:16 AM", + "userId" : "5998636", + "content" : "Hi, Jimmy Just now received the components and will update the status once the rework has been done. In our application we have faced these issue two times (at rail 1.5V and at Rail 3.3V)." + }, { + "contentId" : "3272477", + "userName" : "Jimmy Hua", + "rankPoints" : "17640", + "rankName" : "Genius", + "date" : "Mar 2, 2020 4:02 PM", + "userId" : "4798049", + "content" : "Hi Revanth, Please keep Alejandro and I updated on your additional testing at your earliest convenience. Regards, Jimmy" + }, { + "contentId" : "3292983", + "userName" : "Jimmy Hua", + "rankPoints" : "17640", + "rankName" : "Genius", + "date" : "Mar 20, 2020 8:12 PM", + "userId" : "4798049", + "content" : "Hi Revanth, Do you have any updates for both Alejandro and I? Regards, Jimmy" + }, { + "contentId" : "3293174", + "userName" : "Revanth A1", + "rankPoints" : "170", + "rankName" : "Prodigy", + "date" : "Mar 21, 2020 5:28 AM", + "userId" : "5998636", + "content" : "Hi, Jimmy we tried replacing the IC which was available in the PTD , instead of replacing the whole PTD but it dint workout, now we have sent our board to remove the whole PTD (Since the ground thermal pads are thick it difficult to remove easily). but now due the situation due to COVID-19 , most of the companies are shutdown now and it will take some time to receive our board. I will let yu know once we receive and test it. Thanks!" + }, { + "contentId" : "3297251", + "userName" : "Jimmy Hua", + "rankPoints" : "17640", + "rankName" : "Genius", + "date" : "Mar 25, 2020 10:05 PM", + "userId" : "4798049", + "content" : "Hi Revanth, Sorry I missed your reply and thank you for the update. It is unfortunate that we are in the COVID-19 predicament and I hope all is well on your end. I will keep this thread up on place it under \"Waiting for Customer\" status and will ping me when you reply back with more information on this. Regards, Jimmy" + } ], + "tags" : [ "/support/power-management/f/196/tags/PTD08D210W", "/support/power-management/f/196/tags/UCD9248", "/support/power-management/f/196/tags/PTD08D210%2bUCD9248%2b%2b%2bOVP" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/881174.json b/data/json/DLP/881174.json new file mode 100644 index 0000000000000000000000000000000000000000..4190516a4fe124e987a032a911e1d72d24e990e2 --- /dev/null +++ b/data/json/DLP/881174.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "881174", + "reporterName" : "Tommy Tzeng", + "rankPoints" : "1320", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ30Z554-R1: bq30z55DBTRRR3 DFW issue", + "rankName" : "Expert", + "replies" : " 23", + "views" : " 177", + "queryText" : "Part Number: BQ30Z554-R1 Hi Team, i have a problem,cusotmer use BQ30Z55DBTR-R3 for battery pack solution has been M/P,but DFW issue occur random. was started by DFW, we have reset IC to clear the PF flag but DFW still happen, how can i avoid this problem? or have any idea and suggestion for us. attachment is schematic. JM2SP068PPV600A_schematic (003).pdf", + "partNumber" : " BQ30Z554-R1", + "allResponseList" : [ { + "contentId" : "3259316", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Feb 18, 2020 5:11 AM", + "userId" : "3528441", + "content" : "Hello Tommy, Sorry, can you clarify, what is DFW?" + }, { + "contentId" : "3262365", + "userName" : "Tommy Tzeng", + "rankPoints" : "1320", + "rankName" : "Expert", + "date" : "Feb 20, 2020 8:51 AM", + "userId" : "5169797", + "content" : "Hi Kang Kang, FYI." + }, { + "contentId" : "3268858", + "userName" : "Tommy Tzeng", + "rankPoints" : "1320", + "rankName" : "Expert", + "date" : "Feb 27, 2020 2:05 AM", + "userId" : "5169797", + "content" : "Hi Kang Kang, have any idea or suggestion?" + }, { + "contentId" : "3271218", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Feb 28, 2020 10:23 PM", + "userId" : "3528441", + "content" : "Hello Tommy, Can you check the cycle count and attach the gg file? The DF flash write not successful may mean that the flash is worn out. If this is the case, we should see a high cycle count number in the gg file." + }, { + "contentId" : "3279909", + "userName" : "Tommy Tzeng", + "rankPoints" : "1320", + "rankName" : "Expert", + "date" : "Mar 9, 2020 2:04 PM", + "userId" : "5169797", + "content" : "Hi Kang Kang, but will this this complete charge and discharge increase once? does this have anything to do with the number of write? because we have confirmed that the cycle count of the PACK returned by DFW is more 100 and more than 200,but there are also less than 100, so i don't see this kind of problem appear in the datasheet after using DF flash write many times, so could you help confirm this issue?or is there any way to avoid this kind of problem." + }, { + "contentId" : "3280601", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Mar 9, 2020 9:54 PM", + "userId" : "3528441", + "content" : "Hello Tommy, This most likely means a dataflash is worn out. I am just wondering how many times this has been out in the field. I'll check the conditions for this bit setting." + }, { + "contentId" : "3280672", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Mar 9, 2020 11:30 PM", + "userId" : "3528441", + "content" : "Hello Tommy, During firmware operation, the gauge will try to update Ra tables or Qmax or lifetimes or some other impedance tracking parameter. The bit is set because when the gauge writes to flash, it will try to read back what it wrote. In this case, if the read back is different, the DFW bit is set. The most likely reason would be dataflash is worn out. Can you provide more information on how many packs are experiencing this failure? It could be that some of these packs may have been subject to multiple host side writes and caused the flash to wear out and gauge to unable to write to flash. Who is the end customer?" + }, { + "contentId" : "3282589", + "userName" : "Tommy Tzeng", + "rankPoints" : "1320", + "rankName" : "Expert", + "date" : "Mar 11, 2020 10:17 AM", + "userId" : "5169797", + "content" : "Hi Kang Kang, Can you provide more information on how many packs are experiencing this failure? ans:11/55000 failure rate 0.02%, end custimer is Pegatron. if have DFW problem issue, will it cause IC damage? ic function be normal? as attached is customer the gg file, please reference. JS4HS002P1542000101.txt" + }, { + "contentId" : "3284723", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Mar 12, 2020 7:41 PM", + "userId" : "3528441", + "content" : "Hello Tommy, This does look like a potential flash corruption. Are you able to still communicate with the \"DFW bit set packs\"?" + }, { + "contentId" : "3293615", + "userName" : "Tommy Tzeng", + "rankPoints" : "1320", + "rankName" : "Expert", + "date" : "Mar 23, 2020 4:09 AM", + "userId" : "5169797", + "content" : "Hi Kang Kang, if DFW is turn off(n/a), what other offect will it have?" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ30Z554_2D00_R1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/882868.json b/data/json/DLP/882868.json new file mode 100644 index 0000000000000000000000000000000000000000..83896e71d9cba92316e4b5b9b650a959d06aca18 --- /dev/null +++ b/data/json/DLP/882868.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "882868", + "reporterName" : "user5392072", + "rankPoints" : "330", + "resolutionStatus" : "Resolved", + "ticketName" : "IWR6843ISK: Unable to connect to Demo Visualizer using IWR6843ISK", + "rankName" : "Intellectual", + "replies" : " 32", + "views" : " 206", + "queryText" : "Part Number: IWR6843ISK Hi there， I am unable to connect my IWR6843ISK to the demo visualizer.I am able to use uniflash to flash the pplcount lab xwr68x.bin file of iwr6843isk in the lab, and then use the pplcount gui.exe program to get the point cloud map.During the setup of the IWR6843ISK i have correctly using the correct serial port. But whenever i press \"send config to the mmwave device\" it will show that com port 50 and com port 51 is \"waiting for data\". I hope I can get help, thank you very much, looking forward to your reply. Thanks.", + "partNumber" : " IWR6843ISK", + "allResponseList" : [ { + "contentId" : "3265441", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Feb 24, 2020 3:02 PM", + "userId" : "5118664", + "content" : "Hi, You are using the wrong visualizer. Please read the manual. Regards, Justin" + }, { + "contentId" : "3266434", + "userName" : "user5392072", + "rankPoints" : "330", + "rankName" : "Intellectual", + "date" : "Feb 25, 2020 8:40 AM", + "userId" : "5392072", + "content" : "Hi,Justin . I am able to use uniflash to flash the 3D_people_count_68xx_demo.bin file of iwr6843isk in the lab, and then run the mmWave_People_Counting_GUISetup.exe program.But when I successfully connected to the serial port and pressed \"send configuration\", nothing happened to 3d plot.Even as I walked around the sensor's detection area, he still had no data changes.I sincerely hope to get your advice and reply. Thank you very much." + }, { + "contentId" : "3266443", + "userName" : "user5392072", + "rankPoints" : "330", + "rankName" : "Intellectual", + "date" : "Feb 25, 2020 8:46 AM", + "userId" : "5392072", + "content" : "Hi,Justin . I am able to use uniflash to flash the 3D_people_count_68xx_demo.bin file of iwr6843isk in the lab, and then run the mmWave_People_Counting_GUISetup.exe program.But when I successfully connected to the serial port and pressed \"send configuration\", nothing happened to 3d plot.Even as I walked around the sensor's detection area, he still had no data changes.I sincerely hope to get your advice and reply. Thank you very much. thanks !" + }, { + "contentId" : "3266951", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Feb 25, 2020 4:26 PM", + "userId" : "5118664", + "content" : "Hi, Your device is probably not responding to the configuration file. First, lets confirm that is true without the gui: Connect you device to an application like Tera Term (tera term works well on windows for this) Connect to the UART Com port, set baud rate to 115200 If you reset the device, you should see output similar to this: If you do get output, you can try sending the config to the device using tera term. Set the newline delay to be 100 msec Open another tera term terminal on the DATA Com port - if you see random data coming across, then the device is sending data LED on the device should blink if it is tracking someone. If you get to step 3 and do not see any message in tera term the device is not booting properly. It is usually one of these issues: Power Supply is not compatible (need 5V 3A) - values too high or too low can cause the board to function improperly Device is not set to functional mode (make sure to remove SOP2 and hit the reset button) Device is ES1 - see the user's guide to determine revision Let me know if you need more help. Regards, Justin" + }, { + "contentId" : "3267720", + "userName" : "user5392072", + "rankPoints" : "330", + "rankName" : "Intellectual", + "date" : "Feb 26, 2020 7:16 AM", + "userId" : "5392072", + "content" : "Hi,Justin . First, I determined that my power supply was 5V 3A and my device was ES2. 1. I used uniflash to put 3d_people_count_68xx_demo.bin file flash into iwr6843isk evm, and removed the sop2 jumper and clicked reset button to enter function mode.Start the Tera Term program to connect to the UART COM port, set the baud rate to 115200, press the reset button of the device, and there is no response in the display window of Tera Term. 2. In order to eliminate the problem of the device itself, I burned down the previous pplcount_lab_xwr68xx.bin file and did the same operation as above, and found that the Tera Term display window responded. thanks!" + }, { + "contentId" : "3267764", + "userName" : "user5392072", + "rankPoints" : "330", + "rankName" : "Intellectual", + "date" : "Feb 26, 2020 8:09 AM", + "userId" : "5392072", + "content" : "Hi, Justin. I really need your help. How do you configure a device to use tera or other serial port tool terms?Are there any relevant documents and codes for reference? I sincerely hope to get your advice and reply. Thank you very much. thanks." + }, { + "contentId" : "3268253", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Feb 26, 2020 4:06 PM", + "userId" : "5118664", + "content" : "Hi, Tera term is really just a serial port utility - you can use it to send or receive data - its useful for debugging. You can configure the device with it if you want to, just paste the configuration file into it. Back to your problem - the prebuilt binary should work since the device is ES2 and has the correct power supply. I would recommend using Code Composer Studio to rebuild the binary incase there was some corruption during the install process of the toolbox. Regards, Justin" + }, { + "contentId" : "3270482", + "userName" : "user5392072", + "rankPoints" : "330", + "rankName" : "Intellectual", + "date" : "Feb 28, 2020 9:58 AM", + "userId" : "5392072", + "content" : "Hi,Justin . I really need your help. I tried to rebuild the.bin file using Code Composer Studio 8.1.0 or reinstall the toolkit, but still could not get the image data correctly. This time I chose the configuration document, but every time I pressed the \"send configuration\" button, the visualizer failed to respond. thanks！" + }, { + "contentId" : "3270486", + "userName" : "user5392072", + "rankPoints" : "330", + "rankName" : "Intellectual", + "date" : "Feb 28, 2020 10:03 AM", + "userId" : "5392072", + "content" : "Hi,Justin . I really need your help. I want to use IWR6843ISK EVM flash tida-010022 pc_lab_xwr68xx.bin file and run it successfully on the device, hoping to solve the following two problems. 1. Which visualizer should I use to observe the trajectory and point cloud map of the human body? When I used mmwave_people_counting_guisetu.exe, the result was the same as before, even without the GUI. 2. Can use serial port tool to send commands, configure relevant parameters, start sensors and read data. Is there any relevant document for reference? I am currently using: IWR6843ISK (ES2.0) + MMWAVEICBOOST Code Composer Studio 8.1.0 mmwave_industrial_toolbox_4_1_0 mmwave_industrial_toolbox_4_2_0 mmwave_sdk_03_03_00_03 uniflash_5.2.0 mmWave_Demo_Visualizer 3.3.0 MATLAB Runtime 2017a(9.2) I sincerely hope to get your advice and reply. Thank you very much. thanks！" + }, { + "contentId" : "3270882", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Feb 28, 2020 4:40 PM", + "userId" : "5118664", + "content" : "Hi, I can think of a few potential issues: The com ports you have entered may be flipped. The computer is blocking access to the com ports, so that the gui application cannot use them. This is common with unregistered software, and can usually be fixed by running as admin. The wrong configuration is being sent (I think you already confirmed you were using the correct configuration and setup) To use the TIDA-01022, please download an older version of the toolbox. Version 4.0.0 is best. You can select different version of the toolbox from thecompany Resource Explorer page. Once you have this, run lab \"68xx_people_counting\" - this is the same software used in TIDA-01022. This comes with a Matlab gui - see if this one works for you. Regards, Justin" + } ], + "tags" : [ "/support/sensors/f/1023/tags/UniFlash", "/support/sensors/f/1023/tags/IWR6843ISK" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/883046.json b/data/json/DLP/883046.json new file mode 100644 index 0000000000000000000000000000000000000000..9170adaabc1ced5ce51356c361a74171254e99ed --- /dev/null +++ b/data/json/DLP/883046.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "883046", + "reporterName" : "user5844861", + "rankPoints" : "110", + "resolutionStatus" : "Resolved", + "ticketName" : "UCC28600: TINA example model setup, changing the transformer to a coupled inductor", + "rankName" : "Prodigy", + "replies" : " 22", + "views" : " 109", + "queryText" : "Part Number: UCC28600 Hi, I would like to design a multi-ouput flyback converter based on UCC28600 controller IC. I would also like to simulate the circuit, therefore I was trying to change the transformer to a coupled inductor (because later I will need more than one output) in the given TINA example model to see if it is even possible to simulate the same system but with a coupled inductor with the same properties used with the transformer. Unfortunately, if I use a coupled inductor, the simulation result is completely different than before. Is there any way to change the transformer to component with which I would be able to simulate successfully a multi-output flyback topology? Thank you in advance! Bálint", + "partNumber" : " UCC28600", + "allResponseList" : [ { + "contentId" : "3266782", + "userName" : "Hong Huang", + "rankPoints" : "18085", + "rankName" : "Mastermind", + "date" : "Feb 25, 2020 2:56 PM", + "userId" : "616779", + "content" : "I suggest you simulate just with single output. Then you use cross regulation to understand other output. It is mainly a transformer simulation which you need to build your own model. Basically just to find out the leakages and coupling factors" + }, { + "contentId" : "3295935", + "userName" : "user5844861", + "rankPoints" : "110", + "rankName" : "Prodigy", + "date" : "Mar 24, 2020 8:30 PM", + "userId" : "5844861", + "content" : "Hey, First, I really appreciate your answer, thank you very much! I took your advice and I was trying to simulate the circuit only with one output. Right now, all of the component values have been calculated but the circuit either works in a really weird way, or I get the infamous convergence problem. For example, the weird thing is that voltage top of the current sense resistor has a waveform which is far from ideal, it doesn't have the ramp increase, instead the voltage changes instantly. If the current source is around 4 A, than the duty cycle of the OUT pin looks strange as well. It has a kind of a normal cycle, after that some really thin pulses and it keeps repeating. I attached the current version. Do you have an idea why is it working like this? Edit.: I left the given transformer model in the simulation, I just changed its values based on my calculations. mine.TSC" + }, { + "contentId" : "3295958", + "userName" : "Hong Huang", + "rankPoints" : "18085", + "rankName" : "Mastermind", + "date" : "Mar 24, 2020 8:50 PM", + "userId" : "616779", + "content" : "It looks some setup not good. Can you start with the TINA design (attached here, \"slum608.TSC\") fromcompany web and change one thing at a time to see which change causing the convergence problem? I just ran \"slum608.TSC\" and it worked ok. slum608.TSC" + }, { + "contentId" : "3315616", + "userName" : "user5844861", + "rankPoints" : "110", + "rankName" : "Prodigy", + "date" : "Apr 14, 2020 4:44 PM", + "userId" : "5844861", + "content" : "Hi, Since then I did what you suggested, and the main reason why the circuit was not working is the incorrect secondary diode I've chosen. My problem now is the following: The attached simulation works as expected until 1.4A of load. The problem is, if I go higher than this value, the controller is unable to hold the output voltage on the desired 12V, even though all the values (OVP, current sense etc) have been calculated for 197W output power with 85% efficiency, therefore if the output current would be around 16A, it still should be able to work. Now I'm a bit stucked. I think the chosen OVP resistor values and current sense protection (Rcs and Rpl) have been calculated correctly, I don't really see why the controller stops the operation. Unfortunately, I don't know TINA that well, but my first thought was maybe the diode on the output causes some problems, as the current one is able to handle 1A maximum forward current, but changing that value doesn't help. Maybe somehow the state machine starts to work incorrectly? May I ask your help in this regard? Thank you in advance!step_by_step.tsc" + }, { + "contentId" : "3315779", + "userName" : "Hong Huang", + "rankPoints" : "18085", + "rankName" : "Mastermind", + "date" : "Apr 14, 2020 7:12 PM", + "userId" : "616779", + "content" : "Can you probe each node to see if any hint? Also, when 12V is not held, does it drop or shutdown? If it drops, which means some setup is likely saturated. If shutdown, it means some fault triggered. You need to check one at time." + }, { + "contentId" : "3316413", + "userName" : "user5844861", + "rankPoints" : "110", + "rankName" : "Prodigy", + "date" : "Apr 15, 2020 8:45 AM", + "userId" : "5844861", + "content" : "12V slowly drops, it is quite clear that the controller doesn't put energy from the primary side, so the capacitor on the secondary side just loses its charges and the voltage drops in the same ratio. This is how it looks the drop after the load reaches the problematic level. And there are weird spikes in the current signal after the 2ms mark if I zoom in. This happens at 2A of load. This thing goes even more weird, if I change the load to 16A. In that case the controller keeps the primary side transistor open, and although the voltage on the output drops, the waveforms look really strange after the load goes on." + }, { + "contentId" : "3317031", + "userName" : "Hong Huang", + "rankPoints" : "18085", + "rankName" : "Mastermind", + "date" : "Apr 15, 2020 5:14 PM", + "userId" : "616779", + "content" : "Can you compare your simulation circuit and the original? My review of your circuit looks you removed the feedback loop compensation components on TL431 so your circuit cannot make correct loop compensation." + }, { + "contentId" : "3320318", + "userName" : "user5844861", + "rankPoints" : "110", + "rankName" : "Prodigy", + "date" : "Apr 18, 2020 4:03 PM", + "userId" : "5844861", + "content" : "I added the loop compensation as you suggested by following the steps in the \"Compensation Design With TL431 for UCC28600\" (SLUA671) document. The circuit unfortunately still doesn't work as expected. I can go a bit higher with the current up to around 4A (you can see a picture about a simulation with 1.6A load below), but it is still far from the final 16A. A was also trying to add the Zener network later before Rled, but it didn't help either. Based on the transfer characteristics, the compensation network should do the work, I changed the crossover frequency to 3kHz of Vo/Vcomp, it also meets with all the stability conditions. The other really weird thing for me (although maybe I just misunderstood something) is the switching frequency. Shouldn't it work with at least 40kHz bursts? Right now, depending on the load, the switching frequency varies between ~3kHz - 7kHz. And the pictures: Unfortunately it is quite hard to figure out if it reaches 12V or not, because the simulation stops with convergence problem a lot of times. Sometimes pressing 'retry' works, but I don't know how accurate the result going to be after this error. Also if I don't change anything in the example simulation, but I change the simulation time to 30ms, it doesn't run. It quits with convergence error. So back to my circuit: It reaches the target output voltage @1.6A, but during the simulation I had to press 'retry' on the convergence error once. At 3.5A at the start it looks like the system operates in CCM, but the controller is a DCM one, so it shouldn't happen right? The Bode of Vo/Vcomp I also attached the updated simulation circuit. 5824.step_by_step.tsc" + }, { + "contentId" : "3320346", + "userName" : "Hong Huang", + "rankPoints" : "18085", + "rankName" : "Mastermind", + "date" : "Apr 18, 2020 6:18 PM", + "userId" : "616779", + "content" : "How did you decide the loop compensation? How did you design your converter parameter values?" + }, { + "contentId" : "3320453", + "userName" : "user5844861", + "rankPoints" : "110", + "rankName" : "Prodigy", + "date" : "Apr 19, 2020 11:16 AM", + "userId" : "5844861", + "content" : "For the loop compensation as I said I followed the method presented in SLUA671. The following MATLAB code shows my implementation s = tf('s'); Rd = 8; ESR = 50e-3; Rcs = 151e-3; Vtl431min = 2.5; Vdd = 5; Vcesat = 0.3; Vf = 0.7; Ibias = 1e-3; CTRmin = 0.4; Rpullup = 20e3; Rledmax = (Vout-Vf-Vtl431min)/(Vdd-Vcesat+Ibias*CTRmin*Rpullup)*CTRmin*Rpullup; R1 = 10e3; Vsample = 2.5; Rlower = R1*Vsample/(Vout-Vsample); Vin = 325; Voutmax = 13; Nps = 15.27; D = Nps*Voutmax/(Vin+Nps*Voutmax); H = Nps*D/(5*Rcs)*Rd*(ESR+1/(s*Co))/(Rd+ESR+1/(s*Co)); %transfer function of Vo/Vcomp bode(H); Gmid = 10^(12.65/20); %to have 3kHz as cross-over frequency Rled = 499; R2 = Gmid*R1*Rled/(Rpullup*CTRmin); [z,p,k] = zpkdata(H); p = cell2mat(p); fz = abs(p(2,1)); fp1 = 40e3; %suggested pole fp2 = fp1; C2 = 1/(2*pi*R2*fz); C1 = 1/(2*pi*R2*fp1); C3 = 1/(2*pi*Rpullup*fp2); Copto = 2e-9; F = (s*R2*C2+1)/(s*R1*C2*(s*R2*C1+1))*(1/(1+s*Rpullup*(C3*Copto/(C3+Copto))))*Rpullup/Rled*CTRmin; %transfer function of compensation network bode(F); bode(H*F); Are you curious about all the converter parameters (transformer parameters etc), or only the ones which needed for the controller (OVP, current sense, Css etc)?" + } ], + "tags" : [ "/support/power-management/f/196/tags/TINA%2bucc28600", "/support/power-management/f/196/tags/UCC28600" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/885747.json b/data/json/DLP/885747.json new file mode 100644 index 0000000000000000000000000000000000000000..0eb93392a3dd7c8cc82e706eaa23bb4b1bc9af02 --- /dev/null +++ b/data/json/DLP/885747.json @@ -0,0 +1,87 @@ +{ + "ticketNumber" : "885747", + "reporterName" : "y gu", + "rankPoints" : "190", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "The question of function(clusteringDBscan_findNeighbors2Fixed) parameters", + "rankName" : "Prodigy", + "replies" : " 9", + "views" : " 92", + "queryText" : "Hello,TI's engineers.I use ti's IWR1642BOOST and want to develop SRR radar, so i read the demo of short_range_radar(SRR).When i read the clusteringDBscanRun, and see the function of clusteringDBscan_findNeighbors2Fixed(this function is first time appear in clusteringDBscan.c file, line 124),one parameter is confused me. neighCount = clusteringDBscan_findNeighbors2Fixed( detObj2D, point, neighLast, numPoints, epsilon2fixed, epsilonfixed, weight, vFactorfixed,inst->scope, &newCount, inst->dBScanNeighbourLim); The third parameter of neighLast whether the correct?I think this parameter should be neighCurrent.I don't know whether my understanding is wrong, so askcompany engineers can you help me to answer? Can you give me some clusteringDBscan data to better learn. Thanks a lot!!!", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3275972", + "userName" : "Cesar", + "rankPoints" : "52960", + "rankName" : "Guru", + "date" : "Mar 4, 2020 8:24 PM", + "userId" : "20288", + "content" : "Hi, For this question we need to check with algorithm developer. We should be able to get a response by early next week thank you Cesar" + }, { + "contentId" : "3288950", + "userName" : "zigang Yang", + "rankPoints" : "7975", + "rankName" : "Expert", + "date" : "Mar 17, 2020 6:41 PM", + "userId" : "44611", + "content" : "HI, neighCurrent is a pointer pointing to the beginning of the neighbor list for the current scan. And neightLast is a pointer pointing to the end of neighbor list for the current scan. So, neighCurrent is not moving and neightLast is kept moving. And the delta is used to calculate the length of the neighbors founded for the current scan. Hope it helps, Zigang" + }, { + "contentId" : "3304992", + "userName" : "y gu", + "rankPoints" : "190", + "rankName" : "Prodigy", + "date" : "Apr 2, 2020 2:54 PM", + "userId" : "4085724", + "content" : "Hi，ti’ engineer！the function of clusteringDBscan_findNeighbors2Fixed is appear twice，first is find original point’s neighbor, the second is find neighbor’ s neighbor.When we find the neighbor’s neighbor, According to code comments we should compared neighbor’s neighbor’s speed with original point’s speed.If less than vfactor, so we think they are the same class.However, in srr code,your code still use original point’s speed compared with its neighbor’s speed,this compared is finished in the first function of clusteringDBscan_findNeighbors2Fixed, According to your code, the neighbors' neighbors will must be in the same class，This should not be the intent of your code itself.Can you check the function of clusteringDBscanRun，I think there is a logical problem with this function？" + }, { + "contentId" : "3324129", + "userName" : "Cesar", + "rankPoints" : "52960", + "rankName" : "Guru", + "date" : "Apr 22, 2020 11:31 AM", + "userId" : "20288", + "content" : "Hi, I have talked with algorithm developer. We have reviewed the code but we did not see any bug. Could you please provide more information with the code lines you are analyzing? Please provide the code lines you have question about. This will help us understand if there is a bug thank you Cesar" + }, { + "contentId" : "3326592", + "userName" : "y gu", + "rankPoints" : "190", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 3:56 AM", + "userId" : "4085724", + "content" : "Hello,Cesar! I think my previous question was not clearly stated.and i think the function of clusteringDBscanRun has some problem not clusteringDBscan_findNeighbors2Fixed .In clusteringDBscanRun.c file and the 167~175 lines,you find the original obj's neibor,then you should find original obj's neibor's neibor.if find it,we should take the original obj's neibor's neibor's speed compare with the original obj's speed,but the demo code still use the obj's neibor's speed compare with the original obj's speed.So the neighbors' neighbors and original obj's will must be in the same class.Please check it again. the code is in clusteringDBscanRun.c file and the 167~175 lines: if(neighCount >= inst->minPointsInCluster) { int32_t speed = (int32_t) detObj2D[point].speed; /* Check if the new point's velocity is the same velocity as the * clusterOriginator. */ if (_abs(detObj2D[member].speed - speed) < vFactorfixed) { for (ind = 0; ind < newCount; ind ++) { member = neighLast[ind]; inst->scope[member] = POINT_VISITED; } neighLast += newCount; /* Member is a core point, and its neighborhood is added to the cluster */ } } Thanks a lot!" + }, { + "contentId" : "3327282", + "userName" : "zigang Yang", + "rankPoints" : "7975", + "rankName" : "Expert", + "date" : "Apr 24, 2020 4:13 PM", + "userId" : "44611", + "content" : "HI, Within the while loop, we will find all the neighbor's neighbor, neighbor's neighbor's neighbor and etc. Every time, when the function clusteringDBscan_findNeighbors2Fixed is called inside the \"while Loop\", the neighLast will grow longer and the new neighbor's neighbor will become member to be checked. Therefore, the if condition you mentioned below if (_abs(detObj2D[member].speed - speed) < vFactorfixed) will check all the neighbor, neighbor's neighbor and neighbor's neighbor's neighbor with the clusterOriginator. Best, Zigang" + }, { + "contentId" : "3327798", + "userName" : "y gu", + "rankPoints" : "190", + "rankName" : "Prodigy", + "date" : "Apr 25, 2020 7:22 AM", + "userId" : "4085724", + "content" : "hi,Zigang! The demo code's purpose is compare neighbor's neighbor's speed with the clusterOriginator's speed,and if in the vFactorfixed then think it is in the same clusterId.And your code comment is also point that:\"/* Check if the new point's velocity is the same velocity as the clusterOriginator. */\" However, in code the member is still the clusterOriginator's neighbor's index, i think it should be clusterOriginator's neighbor's neighbor's index.So the clusterOriginator's neighbor's neighbor must be in the same clusterId,even thought Within the while loop we will find all the neighbor's neighbor, neighbor's neighbor's neighbor and etc as you said.Please check it again.Thanks!" + }, { + "contentId" : "3328909", + "userName" : "zigang Yang", + "rankPoints" : "7975", + "rankName" : "Expert", + "date" : "Apr 27, 2020 2:34 PM", + "userId" : "44611", + "content" : "HI, In this following if condition: if (_abs(detObj2D[member].speed - speed) < vFactorfixed) speed is the speed of the clusterOriginator. detObj2D[member].speed is the speed of new points, including: the neighbor, neighbor's neighbor and neighbor's neighbor's neighbor and etc. Therefore, we are checking the new points's velocity with the velocity of the clusterOrginator. Please let me know where did I misunderstand. Best, Zigang" + }, { + "contentId" : "3330089", + "userName" : "y gu", + "rankPoints" : "190", + "rankName" : "Prodigy", + "date" : "Apr 28, 2020 8:33 AM", + "userId" : "4085724", + "content" : "Hello,zigang Yang! In function of clusteringDBscanRun,you call the function of clusteringDBscan_findNeighbors2Fixed twice.First time you want to find the clusterOrginator's neibor,and the second time you want to find clusterOrginator's neibor's neibor and clusterOrginator's neighbor's neighbor's neighbor and etc.And you will put the neibor in the inst->neighbors in turn.We look the code behind: while (neighCurrent != neighLast) // neigh shall be at least minPoints in front of neighborhood pointer { // Explore the neighborhood member = *neighCurrent++; // Take point from the neighborhood output->IndexArray[member] = clusterId; // All points from the neighborhood also belong to this cluster inst->visited[member] = POINT_VISITED; neighCount = clusteringDBscan_findNeighbors2Fixed( detObj2D, member, neighLast, numPoints, epsilon2fixed, epsilonfixed, weight, vFactorfixed, inst->scope, &newCount, inst->dBScanNeighbourLim); if(neighCount >= inst->minPointsInCluster) { int32_t speed = (int32_t) detObj2D[point].speed; /* Check if the new point's velocity is the same velocity as the * clusterOriginator. */ if (_abs(detObj2D[member].speed - speed) < vFactorfixed) { for (ind = 0; ind < newCount; ind ++) { member = neighLast[ind]; inst->scope[member] = POINT_VISITED; } neighLast += newCount; /* Member is a core point, and its neighborhood is added to the cluster */ } } } The member is clusterOrginator's neibor,and then you take it compare with the clusterOriginator's speed,this is compared in the first call the function of clusteringDBscan_findNeighbors2Fixed,so the condition: if (_abs(detObj2D[member].speed - speed) < vFactorfixed) will must established, and then you take the new points(clusterOrginator's neibor's neibor) add in the inst->neighbors. I think the member in if condition(if (_abs(detObj2D[member].speed - speed) < vFactorfixed)) should be the clusterOrginator's neibor's neibor, not the clusterOrginator's neibor. Please check it again. Thanks a lot!" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR1642BOOST", "/support/sensors/f/1023/tags/_2300_%2b%2b%2b%2bIWR1642BOOS", "/support/sensors/f/1023/tags/awr20_5F00_a_5F00_swa20_5F00_tirex", "/support/sensors/f/1023/tags/_2300_%2b%2b%2b%2b%2bBUG" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/886080.json b/data/json/DLP/886080.json new file mode 100644 index 0000000000000000000000000000000000000000..f70daffe228dc79983df5f441f80a7b1c2ae2bfb --- /dev/null +++ b/data/json/DLP/886080.json @@ -0,0 +1,87 @@ +{ + "ticketNumber" : "886080", + "reporterName" : "Maxim Fiodorov", + "rankPoints" : "70", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ40Z80: 7th cell calibration problem.", + "rankName" : "Prodigy", + "replies" : " 9", + "views" : " 91", + "queryText" : "Part Number: BQ40Z80 Hi everyone. I have a problem with cell calibration by battery management studio 1.3.86. I set each of 7 cells to 4V on resistors voltage divider. I eter the values for calibration (see attached picture). But I always get 7th cell near 3940mV ad not near 4000mV. All other cells are near 4000mV. Only if I manually adjust VC7 Sense Gain I achieve desired 4000mV at 7th cell. Does anyone had the same problem with calibration by battery management studio 1.3.86.??? Is there any solution to this? I attache 2 gg files with manual and battery studio calibration. bq studio calibration.gg.csv manual calibration.gg.csv", + "partNumber" : " BQ40Z80", + "allResponseList" : [ { + "contentId" : "3277767", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Mar 6, 2020 3:07 AM", + "userId" : "3528441", + "content" : "Hello Maxim I'm assigning this to device expert. Expecta response within 2 days." + }, { + "contentId" : "3279217", + "userName" : "Maxim Fiodorov", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Mar 8, 2020 6:53 AM", + "userId" : "4479536", + "content" : "I forgot to mention when I adjust manually VC7 Sense Gain the BAT pin voltage get adjusted correspondingly but it still inside 1% battery voltage error range. I get the same phenomenon on my design and on evaluation board." + }, { + "contentId" : "3283550", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Mar 11, 2020 10:18 PM", + "userId" : "1864278", + "content" : "The Cell 7 voltage is handled differently from the voltage of other cells. Let me try my EVM and see if there is a way to help you." + }, { + "contentId" : "3287665", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Mar 16, 2020 8:53 PM", + "userId" : "3528441", + "content" : "Please try on the test version (1.3.100), I believe this issue should be resolved. Thanks!" + }, { + "contentId" : "3293422", + "userName" : "Maxim Fiodorov", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Mar 22, 2020 1:52 PM", + "userId" : "4479536", + "content" : "I have tried 1.3.100 version of bq Studio. The problem still exist." + }, { + "contentId" : "3302415", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Mar 31, 2020 5:42 PM", + "userId" : "1864278", + "content" : "Hi Maxim, I guess what you try is to follow the steps in Section 2.2 of the following app note and see if you can have better calibration results. /lit/an/slua868/slua868.pdf Andy" + }, { + "contentId" : "3313090", + "userName" : "Maxim Fiodorov", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 12, 2020 12:51 PM", + "userId" : "4479536", + "content" : "slua868.pdf describe how to calculate the calibration coefficients. I am doing it myself to correct wrong calibration by Battery Management Studio program. My problem is the wrong calibration by Battery Management Studio." + }, { + "contentId" : "3322042", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 10:28 PM", + "userId" : "1864278", + "content" : "I will report this issue to my software team so that they can double-check if it is necessary to update their existing code. Andy" + }, { + "contentId" : "3323099", + "userName" : "Shirish", + "rankPoints" : "2420", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 3:50 PM", + "userId" : "28063", + "content" : "Do you get the same result in bqStudio if you uncheck \"Calibrate Pack Voltage\"?" + } ], + "tags" : [ "/support/power-management/f/196/tags/bq40z80" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/886270.json b/data/json/DLP/886270.json new file mode 100644 index 0000000000000000000000000000000000000000..a0ed89f52b8b2bae1cec8056581b13f462e93c91 --- /dev/null +++ b/data/json/DLP/886270.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "886270", + "reporterName" : "Iurii Hlotov", + "rankPoints" : "190", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ35100: BQ35100", + "rankName" : "Prodigy", + "replies" : " 31", + "views" : " 176", + "queryText" : "Part Number: BQ35100 Hi, There is a customed board with BQ35100 and MCU. I setup BQ35100 in EOS mode (reg. 0x41b1), and modified R Data Seconds (reg. 0x4255) setup 1 second. To get data (voltage, current, temperature) the following sequence is used: 1. Enable BQ; 2. Start BQ (send start command); 3. Read data(voltage or current or temperature); 4. Stop BQ (send stop command); 5. wait for timeout specified in R Data Seconds (expected 1 s) wait until G_DONE bit is set; 6. Disable BQ; The problem is that actually it takes about 4 min (instead of expected 1 s) to wait G_DONE is set. Do I need to send some other command to activate the setting? thanks", + "partNumber" : " BQ35100", + "allResponseList" : [ { + "contentId" : "3277783", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Mar 6, 2020 3:20 AM", + "userId" : "3528441", + "content" : "I've pinged the device expert, please expect a response within two business days." + }, { + "contentId" : "3277834", + "userName" : "Eric Vos24", + "rankPoints" : "3585", + "rankName" : "Expert", + "date" : "Mar 6, 2020 4:15 AM", + "userId" : "3440231", + "content" : "Lurii, I have not seen this and programmed a value of 1 myself to test. Are you sure the gauge is receiving the [Gauge Stop] command? The [GA] bit should clear if so. I also don't recommend a value of 1 second. the gauge needs time to fill in the voltage sampling buffer to accurately calculate the measuredZ. Thanks, Eric Vos" + }, { + "contentId" : "3277982", + "userName" : "Iurii Hlotov", + "rankPoints" : "190", + "rankName" : "Prodigy", + "date" : "Mar 6, 2020 8:10 AM", + "userId" : "6278035", + "content" : "Thanks for reply. Regarding \"the gauge is receiving Stop command\" i'm not sure, i need to verify this with logic analyzer. 1. As far as, I get it the GA bit should be cleared after Stop command is received properly (correct me if I'm wrong). So, should I check GA bit instead of G_DONE in the Control_Status? What is the purpose of G_DONE bit? 2. What is the minimum value of R data seconds reg. to get accurate value of voltage, current and temperature? This is quite weird behavior, because at the first i used the default value of R Data Seconds (15 sec) and the following sequence: - enable BQ; - start BQ (send command and wait until bit GA is set); - stop BQ (send command and wait until bit G_DONE is set); - read data form BQ; - disable BQ; In this case it takes around 15 sec. to read data from BQ (as expected according to datasheet). Then I tried to reduce R Data Seconds to less value (1 sec, 5 sec, 10 sec), but instead of reducing response time it takes unexpected ~4 min to read data (to wait until G_DONE is set). Perhaps the right sequence should be the following: - enable BQ; - start BQ (send command and wait until bit GA is set); - stop BQ (send command and wait until bit GA is clear); - read data (); - disable BQ; Please, provide me a feedback. Thanks." + }, { + "contentId" : "3278409", + "userName" : "Eric Vos24", + "rankPoints" : "3585", + "rankName" : "Expert", + "date" : "Mar 6, 2020 3:16 PM", + "userId" : "3440231", + "content" : "1) yes sending Gauge_Stop should set GA =0 if it was received properly by the gauge. 2) The minimum we recommend is 15Sec which is why it is our default. If it needs to be lower testing should be done on your side to make sure results are consistent. Both procedures should work, but since measuredZ and SOH are updated after GDone. I would follow - enable BQ; - start BQ (send command and wait until bit GA is set); - stop BQ (send command and verify bit GA is clear); -Wait until GDONE = 1 - read data (); - disable BQ;" + }, { + "contentId" : "3278864", + "userName" : "Iurii Hlotov", + "rankPoints" : "190", + "rankName" : "Prodigy", + "date" : "Mar 6, 2020 9:26 PM", + "userId" : "6278035", + "content" : "hi, followed the recommendation of Eric Vos24 and figured out that after sending STOP command the [GA] bit is still set and furthermore waiting for bit [G_DONE] to be set never happens (it is 0 for a very long time). It seems that there is a problem with STOP command. I tried to set R Data Seconds reg. to different values (1 sec, 5 sec, 15 sec), but the result is the same (wait bit [G_DONE] set for a very long time). What might be the problem with STOP command (other command seems to work properly)?" + }, { + "contentId" : "3280588", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Mar 9, 2020 9:44 PM", + "userId" : "3528441", + "content" : "Hello Iurii, Can you wait for a while longer prior to sending STOP? Say 2 more seconds?" + }, { + "contentId" : "3281096", + "userName" : "Iurii Hlotov", + "rankPoints" : "190", + "rankName" : "Prodigy", + "date" : "Mar 10, 2020 9:45 AM", + "userId" : "6278035", + "content" : "Hi, yes I tried this, but result is the same (bit GA is still set after STOP command has been sent). After START has been sent MCU waits for [GA] bit is set (first line on the Logic analyzer log: 0x81) then MCU wait for 2000 ms and sends STOP command (0x12 line 5), then MCU check [GA] bit, but it is still 1 (last but one line 0x81)" + }, { + "contentId" : "3281098", + "userName" : "Iurii Hlotov", + "rankPoints" : "190", + "rankName" : "Prodigy", + "date" : "Mar 10, 2020 9:45 AM", + "userId" : "6278035", + "content" : "Hi, yes I tried this, but result is the same (bit GA is still set after STOP command has been sent). After START has been sent MCU waits for [GA] bit is set (first line on the Logic analyzer log: 0x81) then MCU wait for 2000 ms and sends STOP command (0x12 line 5), then MCU check [GA] bit, but it is still 1 (last but one line 0x81)" + }, { + "contentId" : "3281101", + "userName" : "Iurii Hlotov", + "rankPoints" : "190", + "rankName" : "Prodigy", + "date" : "Mar 10, 2020 9:49 AM", + "userId" : "6278035", + "content" : "Hi, yes I tried this, but result is the same (bit GA is still set after STOP command has been sent). After START has been sent MCU waits for [GA] bit is set (first line on the Logic analyzer log: 0x81) then MCU wait for 2000 ms and sends STOP command (0x12 line 5), then MCU check [GA] bit, but it is still 1 (last but one line 0x81)" + }, { + "contentId" : "3282079", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Mar 11, 2020 1:06 AM", + "userId" : "3528441", + "content" : "It most likely might be that your voltage is not stable yet. Can you provide us a bqStudio log file?" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ35100", "/support/power-management/f/196/tags/BQ35100%2bEOS%2bmode%2bR%2bData%2bSeconds" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/886577.json b/data/json/DLP/886577.json new file mode 100644 index 0000000000000000000000000000000000000000..12ef3376011e2420ebdcd8c2a7c0dde5b42cb1ce --- /dev/null +++ b/data/json/DLP/886577.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "886577", + "reporterName" : "Jiju Chacko24", + "rankPoints" : "170", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ27Z561: BQ27z561 - Battery SOC suddenly jumps from 100 to 0 in few seconds", + "rankName" : "Prodigy", + "replies" : " 12", + "views" : " 107", + "queryText" : "Part Number: BQ27Z561 Hi, We are using BQ27z561 for battery management in our product. Recently we have seen instances where in the battery SOC suddenly jumps from 100 to 50 and sometimes from 100 to 0 within 1 seconds. After this, this the fuel gauge reports LOW battery warning. When the device is kept for charging, the SOC suddenly jumps to 100% within 10 minutes. Regards, JIju Chacko", + "partNumber" : " BQ27Z561", + "allResponseList" : [ { + "contentId" : "3278920", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Mar 6, 2020 11:13 PM", + "userId" : "1864278", + "content" : "Hi JIju, Did you guys choose a proper chemistry id to match your battery? Did you successfully run the learning cycle? Andy" + }, { + "contentId" : "3281017", + "userName" : "Jiju Chacko24", + "rankPoints" : "170", + "rankName" : "Prodigy", + "date" : "Mar 10, 2020 8:28 AM", + "userId" : "3923954", + "content" : "Hi Andy, Yes. the configuration are proper and the device works as expected in our testing environment. The issue reported is from the field testing. With the help of few field engineers we got the know the root cause of the issue. The battery is getting disconnected temporarily and this reboots the device. On the next boot the SOC reading get jumbled up. Currently we have BQFS, GMFS and SREC files generated from the Battery Management Studio application. Do we need to write these files again? What will be the process to calibrate the fuel gauge when connecting and new battery?" + }, { + "contentId" : "3281867", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Mar 10, 2020 7:55 PM", + "userId" : "1864278", + "content" : "The files can be used for mass production. Basically, you program one of these files to a fresh device. Regarding the calibration process, please see the Calibration section of bq27z561 TRM." + }, { + "contentId" : "3282266", + "userName" : "Jiju Chacko24", + "rankPoints" : "170", + "rankName" : "Prodigy", + "date" : "Mar 11, 2020 5:23 AM", + "userId" : "3923954", + "content" : "Hi Andy, I think there is a confusion in understanding the issue. We have followed the steps of calibration from the TRM as you stated. And the device with the battery connected works perfectly as per requirement. In our design, the battery gauge is directly powered from battery. In this case, if the battery is removed for some reason. then on connecting the battery again we see a difference in the battery SOC. I understand there will be some difference as the battery gets relaxed in removal of load. But still the difference of ~70% capacity is not expected. My question is, in case of new battery connection or intermediate battery removal and insertion, do we need to perform any steps in the fuel gauge ?" + }, { + "contentId" : "3283528", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Mar 11, 2020 9:52 PM", + "userId" : "1864278", + "content" : "Try sending a RESET command to the gauge device. The SoC should be updated again. Andy" + }, { + "contentId" : "3283823", + "userName" : "Jiju Chacko24", + "rankPoints" : "170", + "rankName" : "Prodigy", + "date" : "Mar 12, 2020 6:19 AM", + "userId" : "3923954", + "content" : "Hi Andy, We are using below commands from the driver. We added a custom SYSFS entry which will reset the device after power cycle or during battery replacement. case POWER_SUPPLY_PROP_ENABLE_IT: { if(val->intval){ fg_enable_gauge_it(bq); fg_reset(bq); } break; } Just want to confirm if these are the only required steps and we don't need to perform any other operation. Regards, Jiju Chacko" + }, { + "contentId" : "3284853", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Mar 12, 2020 10:52 PM", + "userId" : "1864278", + "content" : "Unfortunately, there is no way for me to verify your code. Here is my suggestion. Basically, make sure that the gauge device is NOT in the SEALED mode before sending the RESET command." + }, { + "contentId" : "3291439", + "userName" : "Jiju Chacko24", + "rankPoints" : "170", + "rankName" : "Prodigy", + "date" : "Mar 19, 2020 2:28 PM", + "userId" : "3923954", + "content" : "Hi Andy, As you can see below. Even in cases where the battery is not removed, we see difference in the battery SOC reported by the fuel gauge. As per our conversation earlier, we added command to set GAUGE_EN=1 and then send a reset command. [ 20.760000] [bq27z561] fg_irq_thread: RSOC:7, Volt:3704, Current:0, Temperature:371 [ 20.770000] [bq27z561] fg_irq_thread: VOLT_HI clear [ 20.780000] [bq27z561] fg_irq_thread: TEMP_HI set [ 20.780000] [bq27z561] fg_irq_thread: VOLT_LOW clear [ 20.790000] [bq27z561] fg_irq_thread: TEMP_LOW clear [ 20.790000] [bq27z561] fg_interrupt_event_provider: status = 4, bq->cache_hi_temp = 0x0, bq->high_temp_threshold_status = 0x0 [ 20.800000] [bq27z561] fg_interrupt_event_provider: Low temperature interrupt received via high temperature threshold set [ 20.820000] [bq27z561] fg_interrupt_event_provider: Low temp condition is cleared, setting current to 960mA [ 20.830000] bq25601_set_charge_current called via fuel gauge= 0x10 [ 22.530000] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 28.620000] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 32.030000] IPv6: ADDRCONF(NETDEV_UP): usb0: link is not ready [ 34.160000] [bq27z561] fg_unseal_complete_access: FG is unsealed [ 34.160000] [bq27z561] fg_enable_gauge_it: Data flash unsealed [ 34.470000] power_supply bms: driver failed to report `voltage_now' property: -1 [ 34.510000] power_supply bms: driver failed to report `voltage_now' property: -1 [ 36.960000] Battery charging disabled [ 36.990000] Battery charging enabled [ 43.740000] [bq27z561] fg_irq_thread: RSOC:14, Volt:3869, Current:960, Temperature:359 [ 43.740000] [bq27z561] fg_irq_thread: VOLT_HI clear [ 43.750000] [bq27z561] fg_irq_thread: TEMP_HI clear [ 43.750000] [bq27z561] fg_irq_thread: VOLT_LOW clear [ 43.760000] [bq27z561] fg_irq_thread: TEMP_LOW clear Regards, Jiju Chacko" + }, { + "contentId" : "3294620", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Mar 23, 2020 8:21 PM", + "userId" : "1864278", + "content" : "Hi Jiju, If the battery hasn't been removed, I will suggest you NOT send the RESET command to the gauge device. Here is my suggestion. After the battery is connected to the gauge and your system, don't power on your system. Instead, let the battery relax for two hours and then power on. I believe you will read back accurate RSOC readings. The purpose of the 2-hour relaxation time is to let the gauge take an OCV measurement and update the FCC, RemCap, and RSOC. Andy" + }, { + "contentId" : "3297820", + "userName" : "Jiju Chacko24", + "rankPoints" : "170", + "rankName" : "Prodigy", + "date" : "Mar 26, 2020 11:02 AM", + "userId" : "3923954", + "content" : "Hi Andy, 2 hours is too long. I was expecting this time to be in seconds. Can you tell me if there is procedure to forcefully calculate battery OCV. Regards, Jiju Chacko" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ27Z561", "/support/power-management/f/196/tags/fuel%2bgauge" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/887030.json b/data/json/DLP/887030.json new file mode 100644 index 0000000000000000000000000000000000000000..63cecec7b9acb869c99ae75fa389f871a3eab280 --- /dev/null +++ b/data/json/DLP/887030.json @@ -0,0 +1,87 @@ +{ + "ticketNumber" : "887030", + "reporterName" : "Murthy", + "rankPoints" : "590", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UC2526: Regulated PWM Output", + "rankName" : "Intellectual", + "replies" : " 9", + "views" : " 67", + "queryText" : "Part Number: UC2526 Dear Sir, We are using UC2526 to control the Buck output voltage as per the attached schematic. Pin no: 1 of UC2526 error amplifier is set to 5V as a fixed reference. Pin no: 2 of UC2526 error amplifier is connected to 4N35 Collector (will vary based on feedback from 0 to 5V). we are using Type II Compensator to stabilize to loop External feed back input signal pass through LM358, BC547 and 4N35 to the Pin no: 2 of UC2526 error amplifier. Output signal from 4N35 output will be square wave (not pure analog signal) will this flow of schematic attached will adjust the duty cycle to regulate the output voltage ??. Please verify the schematic and suggets the your Valued inputs to achive the regulated PWM. Regards Murthy", + "partNumber" : " UC2526", + "allResponseList" : [ { + "contentId" : "3280345", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Mar 9, 2020 6:23 PM", + "userId" : "1139254", + "content" : "Hi Murthy, The schematic appears to be incomplete and I cant read it clearly from the post. Can you post it as a PDF. What is you end application? Thanks Peter" + }, { + "contentId" : "3281411", + "userName" : "Murthy", + "rankPoints" : "590", + "rankName" : "Intellectual", + "date" : "Mar 10, 2020 2:28 PM", + "userId" : "4880309", + "content" : "Dear Sir, please find the attached Schematic for industrial use Regards Murthy Test Schematic.pdf" + }, { + "contentId" : "3283230", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Mar 11, 2020 5:36 PM", + "userId" : "1139254", + "content" : "Hi Murthy, Thanks for the pdf schematic, from what I can see there are no components on the CT or RD pins of the controller so it will not oscillate and there will be no PWM output. Have you looked at the UCC28C4x family of devices they have PSPICE and TINA models that you can use to simulate your circuit. They have variants that do 50% or 100% duty cycle and are only 8 pin devices. Regards Peter" + }, { + "contentId" : "3286229", + "userName" : "Murthy", + "rankPoints" : "590", + "rankName" : "Intellectual", + "date" : "Mar 14, 2020 6:56 AM", + "userId" : "4880309", + "content" : "Dear Sir, Please find the attached schematic.1057.Test Schematic.pdf I have checked UCC28C4x IC TINA model. Please Suggest if any changes required. I need to control step down chopper" + }, { + "contentId" : "3299193", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Mar 27, 2020 1:44 PM", + "userId" : "1139254", + "content" : "Hi Murthy, When you say you want to design a step down chopper do you mean buck stage? Thecompany Webench tool will give you a complete schematic for a buck circuit. Regards Peter" + }, { + "contentId" : "3299866", + "userName" : "Murthy", + "rankPoints" : "590", + "rankName" : "Intellectual", + "date" : "Mar 28, 2020 8:28 AM", + "userId" : "4880309", + "content" : "Hi Peter, Can you share your mail ID. I will share schematic with you. As you Know i am Using PWM IC UC2526 with reference previous posts Problem No 1: My PWM Pulses are missing after certain time period. Because i am using reset pin for my closed loop control using Optocoupler. But i don't what will be the adverse effect of missing PWM pulses on Buck Converter especially Inductor. I Want to resolve this problem.so that's why i am approaching you.By using this my output regulation is good.i testes the system by continuously running for 4 hours.Nothing is happened. But i heard sound from inductor apart from switching noise from starting till 4 Hours. Sounding like tak...after 2 or 3 sec....tak....after 2 or 3 sec....tak....I think these is happened because of missing pulses.Please confirm that this is not a big problem from experts in Power Electronics people from customer organization. Actions from my side: I tried by connecting optocoupler output to Inverting PIN and Comp Pin of UC2526. I am not getting PWM pulses output from UC2526 in closed loop.i think this is happened because of Compensation.if possible can you share closed loop control of Buck Converter application circuit using UC2526. it would be helpful. I Have some queries Question No:1 Comparator output connected 0 to 5V through optocoupler can be connected Invertering pin UC2526. Here i am attaching missing PWM pulses .JPG Hope you will help in solving my problem Regards Murthy" + }, { + "contentId" : "3315501", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Apr 14, 2020 3:47 PM", + "userId" : "1139254", + "content" : "Hi Murthy, I am closing this post as we have moved support to email, please respond to my last email so we continue to work on this problem. Regards Peter" + }, { + "contentId" : "3315797", + "userName" : "Murthy", + "rankPoints" : "590", + "rankName" : "Intellectual", + "date" : "Apr 14, 2020 7:34 PM", + "userId" : "4880309", + "content" : "Dear Sir, I replied to your last mail with PDF document & Schematic Regards Murthy" + }, { + "contentId" : "3323969", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 8:22 AM", + "userId" : "1139254", + "content" : "Hi Murthy, Since we are communicating by email I am going to close this post. Regards Peter" + } ], + "tags" : [ "/support/power-management/f/196/tags/UC2526", "/support/power-management/f/196/tags/LM358" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/887655.json b/data/json/DLP/887655.json new file mode 100644 index 0000000000000000000000000000000000000000..5dd314453f1ae5345786fbe5b73c8cbdcb97697f --- /dev/null +++ b/data/json/DLP/887655.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "887655", + "reporterName" : "Hongjia-Wu", + "rankPoints" : "390", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC28251: Queries about PSpice Average Model", + "rankName" : "Prodigy", + "replies" : " 16", + "views" : " 90", + "queryText" : "Part Number: UCC28251 Hi Team, In UCC28251 average model (slum358.zip), the DC value of output keeps at 90.2V regardless of the change of Vin (200~800V). Is it as expected? Thanks Hongjia", + "partNumber" : " UCC28251", + "allResponseList" : [ { + "contentId" : "3282914", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Mar 11, 2020 2:34 PM", + "userId" : "1139254", + "content" : "Hi Hongjia, The circuit has a closed loop feedback circuit U7 and U5 that should maintain a constant output voltage over the full input voltage range so I think the circuit is behaving as expected. U7 is essentially the voltage loop error amplifier, the output voltage is divided down by R33 and R34 principally. If the voltage at the REF pin of the TL431 exceed 2.5V the TL431 will start to shunt current and pull current through the diode of the opto-coupler. This in turn will demand a lower duty cycle to maintain a constant output voltage. Regards Peter" + }, { + "contentId" : "3283731", + "userName" : "user4103700", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Mar 12, 2020 4:02 AM", + "userId" : "4103700", + "content" : "Hi Peter, Actually, I am the designer of this half bridge power supply, the operation conditions are as below: Switching frequency:100 kHZ Input voltage: 200~800 Vdc Output voltage: 24 Vdc Output power: 180W Rated,216W Max, XFMR turn ratio: 3.714, Primary inductance:1000uH typical, Input voltage feedward used, voltage mode, Primary side control, use diodes as secondary side rectifier, Type III compensation network with TL431B and Zener. This power supply works fine in the steady state, but when I test the load transient capability(1A to 9A,1A/us max), I find the voltage at the pin ILIM will exceed 0.5V for a certain time, the higher slew rate of load transient, the longer overcurrent lasting time; the higher load transient, the longer overcurrent lasting time.(9Amps load is still below steady state OCP setpoint).Also, during the load transient, the waveform ILIM shows imbalanced primary current, but it will recover balanced in the end. 0A to 5A load transient 0A to 5A load transient2 if the overcurrent lasting time is longer than the OC delay time set by the cap at the pin HICC, UCC28251 will shut down the output and enter into hiccup protection mode, if I want to improve the load transient capability, I have to increase the OC delay time. when I test 2A to 7.5A load transient, the output voltage fluctuation seems acceptable. My question is: 1. why does the voltage at ILIM exceed 0.5V and the imbalanced primary current happen when load transient? is it due to loop instability (phase margin and gain margin are not enough) or is it the inherent characteristics of half bridge power supply or the issue of UCC28251 or something else? 2. Cancompany provide a unencrypted transient pspice model of UCC28251 so that I run the transient simulation in the LTSpice? Best regards, Chengjun Wang" + }, { + "contentId" : "3283904", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Mar 12, 2020 8:04 AM", + "userId" : "1139254", + "content" : "Hi Chengiun, It looks like a control loop instability from looking at the ch 4 which i assume is the output voltage, have you tried reducing the gain by a factor of 10 in the control loop to see what effect it has? When you say primary side control do you mean that the controller is on the primary side and that the feedback signal is been fed back through an opto-coupler from the secondary side where the voltage error amplifier is located? Regards Peter" + }, { + "contentId" : "3284192", + "userName" : "user4103700", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Mar 12, 2020 1:01 PM", + "userId" : "4103700", + "content" : "Hi Peter, The CH4 is the output voltage with measured by AC coupling, so it should be the ripple voltage. why do you think it is a control loop instability? How to reduce the gain by factor 10 in the control loop and why does it help? The controller is on the primary side, the feedback signal is fed back through an opto-coupler CNY17-3 from secondary side. Best regards, Chengjun Wang" + }, { + "contentId" : "3299197", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Mar 27, 2020 1:48 PM", + "userId" : "1139254", + "content" : "Hi Chengjun, Sorry for the late response here, to decrease the gain I would increase the value of R5o from 1k to 4k7 or 10k. I would also DC couple the scope probe when measuring Vout during the load transient and offset the 0V level so the signal is still displayed on the screen. Regards Peter" + }, { + "contentId" : "3300243", + "userName" : "user4103700", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Mar 30, 2020 4:56 AM", + "userId" : "4103700", + "content" : "Hi Peter, Thanks for your reply. I will try to increase R50 value in the real test, but it seems no big difference from the average model simulation. R50=1K R50=4.7K R50=10K also, the load transient waveform i shared in the previous reply was captured at the load side so that we see the DC level of voltage (AC coupled) is changing. here i attach the load transient waveform (AC coupled) which is close to the power supply output, i think it is good from the perspective of loop stability. 630Vin 2A to 7.5A_P24 ripple voltage The below is P24 voltage fluctuation (DC coupled) during load transient from 1A to 9A succefully, 630Vin_1A to 9A_P24 And the next chart show the failed load transient, you can see P24 doesn't drop too much during load transient, but due to the voltage of ILIM pin exceeds 0.5 more than 7.52ms, it shuts down the gating signals. 565Vin_1A to 9A_P24_failed Best regards, Chengjun" + }, { + "contentId" : "3303272", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Apr 1, 2020 10:04 AM", + "userId" : "1139254", + "content" : "Hi Chengjun The load transient wave appears to be underdamped, reducing the gain will help reduce the overshoot when recovering but it will increase the initial dip or overshoot voltage. Have you tried to change the gain on the board? Thanks Peter" + }, { + "contentId" : "3308751", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Apr 7, 2020 10:57 AM", + "userId" : "1139254", + "content" : "Hi Chengiun, I hope you have made some progress in the meantime. Since there has been no reply to my last post for nearly a week I am going to close this post. Please open a new post if you have more questions. Regards Peter" + }, { + "contentId" : "3312344", + "userName" : "user4103700", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 10, 2020 7:00 AM", + "userId" : "4103700", + "content" : "Hi Peter, Sorry for delay reply. i have tried to change R50 to 10k, and the test results showed that this power supply will still enter into hiccup mode when load transient from 1A to 9A with 12A/ms slew rate. Also I compared the load transient result with R50 =1k versus 10k, it seemed that the voltage overshoot and undershoot at R50 = 10k was worse. 630V_2 to 7.5A_ R50=1k （please ignore the first step since it is from 0A to 7.5A and UCC28251 enters into OCP mode） 630V_2 to 7.5A_ R50 = 10K Best regards, Chengjun" + }, { + "contentId" : "3315597", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Apr 14, 2020 4:35 PM", + "userId" : "1139254", + "content" : "Hi Chengjun The change in the transient response with the larger value of resistance in series with the opto-coupler is as expected. The gain will be lower and the output voltage deviation during the load transient will be higher. I was hoping that the lower gain and slower response may help the imbalance during the load transient. The OUTA and OUTB PWM should be matched to ensure equal volts-seconds across the transformer so eliminate saturation. Can you check the COMP signal, and OUTA and OUTB pulse width during the load transient when the imbalance occurs. Maybe there is noise on the COMP pin signal that is causing and issue.You will need to use a timebase of 5us/div to capture the signals with good definition. Regards Peter" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC28251" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/887790.json b/data/json/DLP/887790.json new file mode 100644 index 0000000000000000000000000000000000000000..50b4b82f442ed8c699b82a9cbed56cc8727f4492 --- /dev/null +++ b/data/json/DLP/887790.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "887790", + "reporterName" : "user6136286", + "rankPoints" : "60", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "SM72442: question of I2C write data sequence.", + "rankName" : "Prodigy", + "replies" : " 11", + "views" : " 60", + "queryText" : "Part Number: SM72442 in the datasheet of SM72442, for I2C write sequence there is 8 data bytes from frame 4 to frame 11. if frame 4 is data 1, why frame 11 is data 7(it should be data 8)? ,and one of I2C registers is 7 bytes long, why write 8 bytes data?", + "partNumber" : " SM72442", + "allResponseList" : [ { + "contentId" : "3282665", + "userName" : "Jasper Li", + "rankPoints" : "37445", + "rankName" : "Mastermind", + "date" : "Mar 11, 2020 11:49 AM", + "userId" : "3706612", + "content" : "Hi i think it should be a typo. the data bytes is 7 instead of 8 from frames 5 to 11. I don't have EVM as it is quite old device. do you have an IC to try?" + }, { + "contentId" : "3283646", + "userName" : "user6136286", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Mar 12, 2020 1:04 AM", + "userId" : "6136286", + "content" : "thank you so much. I am writing the software , so should i think the frame 11 is no need. please check page 14 of the datasheet of SM72442, NOW the hardware is not ready ,so i cannot test on the software ,but i want to write the right sofeware." + }, { + "contentId" : "3292003", + "userName" : "Jasper Li", + "rankPoints" : "37445", + "rankName" : "Mastermind", + "date" : "Mar 20, 2020 1:10 AM", + "userId" : "3706612", + "content" : "Hi, i think you are right. the data is from frame 4~ frame 10. I will also try this after getting the EVM." + }, { + "contentId" : "3301681", + "userName" : "Jasper Li", + "rankPoints" : "37445", + "rankName" : "Mastermind", + "date" : "Mar 31, 2020 6:50 AM", + "userId" : "3706612", + "content" : "Hi User, sorry for the late, but i'm still waiting for the EVM. thanks for your understanding." + }, { + "contentId" : "3313043", + "userName" : "Jasper Li", + "rankPoints" : "37445", + "rankName" : "Mastermind", + "date" : "Apr 12, 2020 3:08 AM", + "userId" : "3706612", + "content" : "Hi User, i got the EVM, and will try the I2C. what is the status in your side?" + }, { + "contentId" : "3320752", + "userName" : "Jasper Li", + "rankPoints" : "37445", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 5:41 AM", + "userId" : "3706612", + "content" : "Hi, your understanding is correct. the data frame should be from 4 to 10. the 11 is not need. let me know you see issue." + }, { + "contentId" : "3320773", + "userName" : "user6136286", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 6:02 AM", + "userId" : "6136286", + "content" : "THANK YOU for your work, I think this problem is fixed, now I change this chip to 72445 , 72442 need so high frequency PWM ， my NMOS can not work well, MY another question ,do you have saw it?" + }, { + "contentId" : "3327910", + "userName" : "Jasper Li", + "rankPoints" : "37445", + "rankName" : "Mastermind", + "date" : "Apr 25, 2020 11:35 PM", + "userId" : "3706612", + "content" : "Hi Sorry, which question do you refer to?" + }, { + "contentId" : "3328187", + "userName" : "user6136286", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 12:57 AM", + "userId" : "6136286", + "content" : "IT is difficult to Calculate the value of inductance and capacitance, I have find the ripple of No load output Voltage achieved 20%, the inductance is 22UH capacitance is one single Electrolytic capacitor of 330uf。 the load is BLDC motor ， not charge for battery, is some problem ?? can you check for me ,of course if you have time, thank you if you have time I will send to the Schematic diagram, now I hope you just give some advice about how to select the inductance and capacitance. best regard" + }, { + "contentId" : "3329899", + "userName" : "Jasper Li", + "rankPoints" : "37445", + "rankName" : "Mastermind", + "date" : "Apr 28, 2020 5:02 AM", + "userId" : "3706612", + "content" : "could you share the schematic? also share the VIN and VOUT waveform to show that your observation." + } ], + "tags" : [ "/support/power-management/f/196/tags/SM72442", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2bI2C" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/887810.json b/data/json/DLP/887810.json new file mode 100644 index 0000000000000000000000000000000000000000..6f98804661b4dd5915cd23aa5186fb6e21859aec --- /dev/null +++ b/data/json/DLP/887810.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "887810", + "reporterName" : "zhijain xiao", + "rankPoints" : "70", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "How to Use LOW_POWER mode of Tas2559", + "rankName" : "Prodigy", + "replies" : " 14", + "views" : " 97", + "queryText" : "Hi: 1、requirement info: system: linux , and use iic to connect tas2559,use 1.1、When there is no player to play music ,and the speaker to be silence , I need to set tas2559 to be a low power mode . 1.2、When Player is playing music，I need to resume tas2559 to normal mode. 2、I read the pdf 3、I get the info : \"9.6.2.35 LOW_POWER (book=0x00 page=0x00 address=0x79) [reset=0h] \" 3.1、low power mode :I set iic from user space { 0x00, 0x00 }, { 0x7f, 0x00 }, { 0x79, 0x80 }, if I set this data to tas2559 , I can not hear sound . 3.2、normal mode :I set iic from user space { 0x00, 0x00 }, { 0x7f, 0x00 }, { 0x79, 0x00 }, after I set step 3.1 , then I set this data to tas2559 ,the sound cat not resume , I can not hear sound too. So I will never Hear sound unless to reboot system; (Please help me check the step 3.1 and 3.2 , is that right ? can I use the reg to get low power mode ) 4、when I read driver source , and find \"#define TAS2559_SLEEPMODE_CTL_REG TAS2559_REG(0, 2, 7)\" then I can not find info from PDF。Can this reg set the device to be a sleep mode ?if can ,then how can i use it , set which date to tas2559 ,let it switch between low power mode and normal mode . can you give me a demo. thanks!", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3283112", + "userName" : "Ivan Salazar", + "rankPoints" : "48155", + "rankName" : "Mastermind", + "date" : "Mar 11, 2020 4:11 PM", + "userId" : "4261744", + "content" : "Hi Zhijain, Could you try to send these commands after step 3.2? These are taken from device data sheet, power up and unmute sequence: ################### CHANNEL POWER UP #################################################### w 98 05 A3 # Power up Analog Blocks w 98 04 B8 # Power up DSP and clock dividers w 98 07 00 # Unmute Analog Blocks w 98 7f 64 # switch to book100 w 98 07 00 # Soft stepped unmute of audio playback ############################################################################################ I'll double check on my side if these are required when toggling bit 7 from register 0x79. Best regards, -Ivan Salazar Applications Engineer - Low Power Audio & Actuators" + }, { + "contentId" : "3283728", + "userName" : "zhijain xiao", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Mar 12, 2020 3:49 AM", + "userId" : "6297976", + "content" : "0x4e is my iic address. and I can hear sound ,then to set regs : step 3.1: # i2cset -f -y 1 0x4e 0 0 # i2cset -f -y 1 0x4e 0x7f 0 # i2cset -f -y 1 0x4e 0x79 0x80 Now I cant not hear sound . step 3.2: # i2cset -f -y 1 0x4e 0 0 # i2cset -f -y 1 0x4e 0x7f 0 # i2cset -f -y 1 0x4e 0x79 0 # i2cset -f -y 1 0x4e 0x05 0xa3 # i2cset -f -y 1 0x4e 0x04 0xb8 # i2cset -f -y 1 0x4e 0x07 0x0 # i2cset -f -y 1 0x4e 0x7f 0x64 # i2cset -f -y 1 0x4e 0x07 0x0 but after I set these regs , There is no sound , the speaker is still silence" + }, { + "contentId" : "3285710", + "userName" : "Ivan Salazar", + "rankPoints" : "48155", + "rankName" : "Mastermind", + "date" : "Mar 13, 2020 4:21 PM", + "userId" : "4261744", + "content" : "Zhijain, Writing into register 0x79 is similar to using the software shutdown, so the device has to be re-initialized when coming back from low-power mode. For sleep mode you can use the recommendations from section 9.5.3 from the data sheet. You can also take a look at this previous post about TAS2557, but it also applies to TAS2559. Best regards, -Ivan Salazar Applications Engineer - Low Power Audio & Actuator" + }, { + "contentId" : "3286762", + "userName" : "zhijain xiao", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Mar 16, 2020 8:58 AM", + "userId" : "6297976", + "content" : "Hi: 1、please help me check the script . 2、Can we save more power in the sleep mode . The sleep mode :I execute the script \"sleep.sh\", and then the device is no sound. sleep.sh: i2cset -f -y 1 0x4e 0x07 0x01 sleep 2 i2cset -f -y 1 0x4e 0x7f 0x00 i2cset -f -y 1 0x4e 0x07 0x03 i2cset -f -y 1 0x4e 0x04 0x20 i2cset -f -y 1 0x4e 0x05 0x00 i2cset -f -y 1 0x4e 0x00 0x00 i2cset -f -y 1 0x4e 0x04 0x00 i2cset -f -y 1 0x4e 0x00 0x00 i2cset -f -y 1 0x4e 0x7f 0x00 The powerup mode : I execute the script \"powerup.sh\", and then the device has sound . powerup.sh: i2cset -f -y 1 0x4e 0x00 0x00 i2cset -f -y 1 0x4e 0x7f 0x00 i2cset -f -y 1 0x4e 0x05 0xa0 i2cset -f -y 1 0x4e 0x04 0xf8 i2cset -f -y 1 0x4e 0x07 0x00 i2cset -f -y 1 0x4e 0x7f 0x64 i2cset -f -y 1 0x4e 0x07 0x00 this table is test by our hw engineer for the device in the sleep mode . In sleep mode the power of \"DVDD\" is high, Can this power be lower? we find in specifications 7.5 of ," + }, { + "contentId" : "3286764", + "userName" : "zhijain xiao", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Mar 16, 2020 9:00 AM", + "userId" : "6297976", + "content" : "the table here !" + }, { + "contentId" : "3294399", + "userName" : "Ivan Salazar", + "rankPoints" : "48155", + "rankName" : "Mastermind", + "date" : "Mar 23, 2020 5:10 PM", + "userId" : "4261744", + "content" : "Hi Zhijain, I expect to be able to run some tests on the low-power mode by the end of this week. I'll provide you some updates as soon as possible. Best regards, -Ivan Salazar Applications Engineer - Low Power Audio & Actuator" + }, { + "contentId" : "3298746", + "userName" : "zhijain xiao", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Mar 27, 2020 3:22 AM", + "userId" : "6297976", + "content" : "Hi Ivan : I use this device In linux system, driver file :. I think I shuld modify the driver source to sw sleep mode and powerup mode instend of use \"i2cset\" cmd to set iic . So I want to know How to modify the driver source of tas2559: 1.Let the driver automatic get into the sleep mode (auto set the registers in driver ) When there is no music playing in the system . 2.Let the driver automatic get into the powerup mode (auto set the registers in driver ) while there is some music playing in the system . thanks 1" + }, { + "contentId" : "3299218", + "userName" : "Ivan Salazar", + "rankPoints" : "48155", + "rankName" : "Mastermind", + "date" : "Mar 27, 2020 2:06 PM", + "userId" : "4261744", + "content" : "Zhijain, I'm unable to answer driver related questions, please let me communicate your questions to our SW team and get back with further comments. Best regards, -Ivan Salazar Applications Engineer - Low Power Audio & Actuator" + }, { + "contentId" : "3303547", + "userName" : "Ivan Salazar", + "rankPoints" : "48155", + "rankName" : "Mastermind", + "date" : "Apr 1, 2020 1:56 PM", + "userId" : "4261744", + "content" : "Zhijain, Some comments from our software team: The sleep and powerup feature is available in TAS2562 onwards. We don’t have auto Power up and power down of amplifier based on I2S clocks. In tas2559, the only way is to explicitely powerup the device using i2c when music is available to be played. Best regards, -Ivan Salazar Applications Engineer - Low Power Audio & Actuator" + }, { + "contentId" : "3304317", + "userName" : "zhijain xiao", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 2, 2020 1:53 AM", + "userId" : "6297976", + "content" : "Hi Ivan: Thanks ! Count you check the messages ,I sent it to you at \"Mar 16, 2020 8:58 AM\" . 1、please help me check the script ,\"sleep.sh\" and \"powerup.sh\" . 2、Can we save more power in the sleep mode ." + } ], + "tags" : [ "/support/power-management/f/196/tags/sleep%2bmode", "/support/power-management/f/196/tags/TAS2559", "/support/power-management/f/196/tags/low%2bpower" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/888430.json b/data/json/DLP/888430.json new file mode 100644 index 0000000000000000000000000000000000000000..413af3727fc25bf908313d5a83ca087a14e08af2 --- /dev/null +++ b/data/json/DLP/888430.json @@ -0,0 +1,87 @@ +{ + "ticketNumber" : "888430", + "reporterName" : "J A Valina", + "rankPoints" : "40", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LMZM23600: Output voltage too low", + "rankName" : "Prodigy", + "replies" : " 9", + "views" : " 85", + "queryText" : "Part Number: LMZM23600 We are using the LMZM23600V5SILT on a prototype to generate a 5 volt output from a 20 volt input. With an approximately 2 mA load (the minimum feasible at this time), the output on the prototype is slightly less than 3 volts; adding a 100 ohm resistor load reduces the output to around 2 volts. With the minimal load, the output voltage appears stable on the oscilloscope; with the 100 ohm load, the output is erratically varying by 250 mV. The circuit diagram is the same as Figure 37 with the exception that feedback is directly connected to the output without any resistors. Cin (C1102) is 10 uF 50 v X7R and Cout (C1101) is 47 uF 16 v X5R. The board layout is approximately the same as that shown in Figure 82 of the data sheet. The differences for the layout are: 1. Footprint pad size is 0.45 x 0.8 (recommended footprint has 0.3 x 0.65) 2. FB and OUT are both connected directly to a component side power plane 3. Under component ground plane fill has 0.225 gap to component pads. Are these differences likely to account for the problem? Are there exposed pads on the underside of the component that could be shorting to the ground fill under the component? Or does it seem more likely that either the component is bad or there is a solder bridge between pins? Thank you for your help.", + "partNumber" : " LMZM23600", + "allResponseList" : [ { + "contentId" : "3286184", + "userName" : "Jimmy Hua", + "rankPoints" : "17640", + "rankName" : "Genius", + "date" : "Mar 14, 2020 1:32 AM", + "userId" : "4798049", + "content" : "Hi J A Valina, Can you probe the SW node to check the switching frequency of the part? This can be done by probing the top side of the exposed inductor. Please be careful when probing the exposed terminal and make sure not to accidentally short it to GND. Doing so will damage the part. Additionally can you read out the voltage measurements on each pin? As for the PCB layout, generally I would recommend having a small thin trace connecting feedback to VOUT. The feedback pin is generally considered a sensitive node since it can couple noise if there is a large enough plane. This may result in output voltage regulation issues. Note that Figure 82 also shows the thin feedback connection to VOUT power plane. Another thing you can do is try to mechanically press on the part and check regulation. This will exercise if there is any pin connectivity issue which would point to solder voids/ no connects. You can reflow the part off your prototype board and examine both the part and your board to see if there are any solder bridges. Regards, Jimmy" + }, { + "contentId" : "3286305", + "userName" : "J A Valina", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Mar 14, 2020 6:10 PM", + "userId" : "65707", + "content" : "Hi Jimmy, Here's the SW node trace: It appears to be oscillating at 754 kHz (the frequency shown in the image above is incorrect). I cannot probe most of the pins since the pads are concealed by the module, but Vin is 20.43 v and Vout is 2.94 v. Pressing down on the module had no effect. I will alter the PCB layout of the FB pin for the next prototype. Thanks for your help! Jay" + }, { + "contentId" : "3286468", + "userName" : "Jimmy Hua", + "rankPoints" : "17640", + "rankName" : "Genius", + "date" : "Mar 15, 2020 10:10 PM", + "userId" : "4798049", + "content" : "Hi Jay, If you are using a fixed output power module (LMZM23600V3 or LMZM23600V5) then the switching frequency is expected to be typical at 750kHz. However, the switch node doesn't look like a square-wave. As previously mentioned, please try to reduce the parasitic inductance on FB node by having a thin dedicated trace to VOUT for fixed output option. Let me know if you have any additional questions on this. I will close this thread for now. Regards, Jimmy" + }, { + "contentId" : "3286477", + "userName" : "J A Valina", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Mar 15, 2020 11:03 PM", + "userId" : "65707", + "content" : "Hi Jimmy, Do you think that having the solid connection from FB to VOUT is the cause of the problem? It seems to me that connecting FB to VOUT by a thin trace would increase rather than decrease the inductance. Thanks for your help! Jay" + }, { + "contentId" : "3286559", + "userName" : "Jimmy Hua", + "rankPoints" : "17640", + "rankName" : "Genius", + "date" : "Mar 16, 2020 3:49 AM", + "userId" : "4798049", + "content" : "Hi Jay, Let me redact what I said previous, for some reason during the explanation I was thinking adjustable when you are using fixed. Actually when you are using the fixed version, the feedback resistors should be internal. This means the sensitive node is protected and accounted for internally. I don't think I asked this, how many of your boards experienced this failure? Also was the part hand soldered onto your prototype or did it have a control reflow profile? Again the switch node is abnormal and should be a clean square wave. Can you do a ABBA test on two prototype boards to see if the failure follows the part? Regards, Jimmy" + }, { + "contentId" : "3297258", + "userName" : "Jimmy Hua", + "rankPoints" : "17640", + "rankName" : "Genius", + "date" : "Mar 25, 2020 10:14 PM", + "userId" : "4798049", + "content" : "Hi Jay, Can I get an update on the questions above? What is the progress of the ABBA test? Does the failure move with the unit? Additionally what are you power downstream? If possible try to isolate the circuit by disconnecting the downstream system and retest troubleshooting with either a load resistor or E-LOAD to check operation of the LMZM23600 alone. Regards, Jimmy" + }, { + "contentId" : "3302485", + "userName" : "Jimmy Hua", + "rankPoints" : "17640", + "rankName" : "Genius", + "date" : "Mar 31, 2020 6:53 PM", + "userId" : "4798049", + "content" : "Hi Jay, Can you give an update to the ABBA testing? Have you tried continuity test? You can probe the voltage measurements between all pins and ground to get an understanding if there is any shorts or abnormal voltage. Also I have a few more questions about this condition: Just to reconfirm you application condition: VIN = 20V; VOUT = 5V; IOUT = ~50mA; Tambient = 25degC (room temperature) What peak temperature was the device reflowed at? Was the device hand soldered or did it go through a controlled reflow process? Can you provide the date and lot code for these parts? This information is usually detailed in the shipping label on the package. How many failures has this been observed on? I'm guessing this failure is seen on the same site on different boards? Regards, Jimmy" + }, { + "contentId" : "3306396", + "userName" : "Jimmy Hua", + "rankPoints" : "17640", + "rankName" : "Genius", + "date" : "Apr 3, 2020 6:22 PM", + "userId" : "4798049", + "content" : "Hi Jay, Any updates on the testing and feedback for my questions? Again I'd like to reiterate that the switching waveform that you measured is not characteristic of a switching converter (generally square wave). I'd like to see the same test done on a new unit on the same PCB layout to confirm issue is preserved. Regards, Jimmy" + }, { + "contentId" : "3323465", + "userName" : "Jimmy Hua", + "rankPoints" : "17640", + "rankName" : "Genius", + "date" : "Apr 21, 2020 9:05 PM", + "userId" : "4798049", + "content" : "Hi, I have not heard back from you for some time and will assume you were able to close this issue on your end. Because of this, I will be closing this thread for now. If you have any further questions on this, please reply back to this and the thread will reopen for further discussion. Regards, Jimmy" + } ], + "tags" : [ "/support/power-management/f/196/tags/LMZM23600", "/support/power-management/f/196/tags/Low%2boutput%2bVoltage" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/888827.json b/data/json/DLP/888827.json new file mode 100644 index 0000000000000000000000000000000000000000..3b73daf7f941d4f653448d603edb444ca6014843 --- /dev/null +++ b/data/json/DLP/888827.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "888827", + "reporterName" : "Kubendran G1", + "rankPoints" : "270", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM5041: Feedback loop Compensation", + "rankName" : "Intellectual", + "replies" : " 17", + "views" : " 116", + "queryText" : "Part Number: LM5041 Hi Every one: I need to clarify LM5041 application circuit compensation design. Application circuit error opamp pole and zero placed below freq. Error op amp zero 1 placed by R35,C36 @ 1.326KHz Error op amp zero 2 placed by R32,C40 @ 22.9KHz Error op amp pole 1 placed by R42,C40 @96.7KHz Error op amp pole 2 placed by R35,C35 @279KHz My question 1) Op amp first zero placed in plant double pole L=60uH, Cout: 932uH F=673Hz? 2)Op amp second zero placed freq where should get? 3) I dint find Cout ESR value. Pole 1 placed in plant zero? I think Pole 2 placed almost in buck switching freq.LM5041..docx 3) How to compensate opto pole by error opamp in this application? 4)Kindly share any document available for compensation design for this application. (Opto coupler feedback with external opamp) 5) R11 and C11 form the opto pole? Kindly reply as soon as possible. Regards, Kubendran", + "partNumber" : " LM5041", + "allResponseList" : [ { + "contentId" : "3286821", + "userName" : "Kubendran G1", + "rankPoints" : "270", + "rankName" : "Intellectual", + "date" : "Mar 16, 2020 10:00 AM", + "userId" : "6226009", + "content" : "Hellocompany Team, I am expecting your valuable reply. Regards, Kubendran" + }, { + "contentId" : "3288788", + "userName" : "Kubendran G1", + "rankPoints" : "270", + "rankName" : "Intellectual", + "date" : "Mar 17, 2020 4:22 PM", + "userId" : "6226009", + "content" : "Hellocompany Team, We are facing loop compensation and buck switching node voltage oscillation issue with respect to LM 5041 application circuit design. Always i seen LM5041 related query response very delayed. Kindly reply previous query. Regards, Kubendran" + }, { + "contentId" : "3289706", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Mar 18, 2020 11:12 AM", + "userId" : "1139254", + "content" : "Hi Kubendran, Sorry for the delay, the office that supports this controller was on public holiday, I have assigned an AE to this post. Regards Peter" + }, { + "contentId" : "3289716", + "userName" : "Kubendran G1", + "rankPoints" : "270", + "rankName" : "Intellectual", + "date" : "Mar 18, 2020 11:22 AM", + "userId" : "6226009", + "content" : "Hi Peter, When will i expect the reply. Regards, Kubendran" + }, { + "contentId" : "3308730", + "userName" : "Kubendran G1", + "rankPoints" : "270", + "rankName" : "Intellectual", + "date" : "Apr 7, 2020 10:24 AM", + "userId" : "6226009", + "content" : "Hellocompany team, No reply? Regards, Kubendran" + }, { + "contentId" : "3308826", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Apr 7, 2020 12:16 PM", + "userId" : "1139254", + "content" : "Hi Kubendran, My mistake, there was a mistake in the email address for the AE in the system and this post did not appear on his list. I am checking if the AE assigned can support if not I will assign a new AE to help. I should have an update tomorrow. Regards Peter" + }, { + "contentId" : "3310018", + "userName" : "Teng Feng", + "rankPoints" : "9390", + "rankName" : "Genius", + "date" : "Apr 8, 2020 7:58 AM", + "userId" : "5617595", + "content" : "Hi Kubendran, Unfortunate, I didn't find any document for the compensation design of this application. In this application, the designer used much complex two stage network with two LM6132 op amps and a LM4041 reference. I guess this circuit demonstrates the flexibility that can be used in electronic circuit design. I think it can be designed simpler with only one amplifier LM6132 and one reference LM4041. Since in this application, there is no internal error amplifier used, so it relies on the designer to add the error amplifier. It is targeted at isolated designs the error amp is usually on the secondary side driving an opto-coupler through the isolation barrier to the control pin. The schematic in page 14 of the LM5041 datasheet shows such a scheme. U4A is the error amplifier. C35, R35, C36, R42, C40 and R32 make up the type III compensation network. Regards, Teng" + }, { + "contentId" : "3310048", + "userName" : "Kubendran G1", + "rankPoints" : "270", + "rankName" : "Intellectual", + "date" : "Apr 8, 2020 8:36 AM", + "userId" : "6226009", + "content" : "Hi Sir, Please read carefully my previous query. What you are said error op amp R and C value corresponding pole and zero frequency already calculated. My question how you are placed compensator pole,zero and opto coupler pole to the plant response. If i consider plant is double pole that value not matched with actually what you are used in compensator pole and zero. Actually current mode plant having one pole and one zero. In this way also checked compensator value did not matched. Kindly look this one serious and give best solution.I am facing converter output oscillating issue. Regards, Kubendran" + }, { + "contentId" : "3310118", + "userName" : "Teng Feng", + "rankPoints" : "9390", + "rankName" : "Genius", + "date" : "Apr 8, 2020 9:52 AM", + "userId" : "5617595", + "content" : "Hi Kubendaran, Did you made a measurement of the gain, phase or if you have done a load transient test and measured the response of the output voltage waveform to see if the response with well damped or under damped. I don't think we can get a final value through calculation, actually it is complected and difficult to establish the signal model. My suggestion is: please adjust the compensation according the measured transient performance. Regards, Teng" + }, { + "contentId" : "3310134", + "userName" : "Kubendran G1", + "rankPoints" : "270", + "rankName" : "Intellectual", + "date" : "Apr 8, 2020 10:07 AM", + "userId" : "6226009", + "content" : "Hi Sir, I will share the waveform to your mail. Please reply. Regards, Kubendran." + } ], + "tags" : [ "/support/power-management/f/196/tags/LM5041" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/889133.json b/data/json/DLP/889133.json new file mode 100644 index 0000000000000000000000000000000000000000..e5439961352ad88407850df40783399a1f015f87 --- /dev/null +++ b/data/json/DLP/889133.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "889133", + "reporterName" : "Thomas Gati", + "rankPoints" : "20", + "resolutionStatus" : "", + "ticketName" : "TPS50601A-SP: TPS50601A-SP Load and Line regulation; Vsense voltage not constant, it varies", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 55", + "queryText" : "Part Number: TPS50601A-SP Hi Test results (24 degrees C case is shown) indicate load and line regulation issues. Voltages are measured with respect to analog return. In particular, the Vsense pin voltage is expected to remain constant (within micro volts) as load current and input voltage are varied. Test results indicate undue magnitudes of voltage variation of the Vsense pin. MHP50601A TPS50601A-SP EM319 Load Vout1 Vsense Vss PG EN Vin Tsink Iin Pin Pout Ploss efficiency ch1 ch2 ch3 ch4 ch5 ch8 ch9 ch10 Test Date UNIT amp volt volt volt volt volt volt °C amp watt watt watt 2/6/2020 SN1 0.101 0.886 0.809 1.486 1.647 1.345 3.292 26.2 0.037 0.1 0.1 0.0 72.6% 2/6/2020 SN1 6.004 0.802 0.798 1.447 1.658 1.319 3.268 25.9 2.532 8.3 4.8 3.5 58.2% 2/6/2020 SN1 0.101 0.887 0.809 1.497 3.001 1.761 5.997 26.2 0.031 0.2 0.1 0.1 47.8% 2/6/2020 SN1 6.004 0.727 0.785 1.429 3.006 1.753 5.985 26.4 1.270 7.6 4.4 3.2 57.4% 2/6/2020 SN1 0.101 4.385 0.810 1.495 2.501 1.655 4.996 28.1 0.106 0.5 0.4 0.1 83.6% 2/6/2020 SN1 6.004 4.410 0.814 1.498 2.525 1.639 4.939 28.2 6.060 29.9 26.5 3.5 88.5% 2/5/2020 SN1-16 0.101 0.884 0.809 1.517 1.646 1.347 3.289 28.5 0.037 0.1 0.1 0.0 73.1% 2/5/2020 SN1-16 6.004 0.802 0.798 1.484 1.512 1.321 3.264 28.4 2.610 8.5 4.8 3.7 56.5% 2/5/2020 SN1-16 0.101 0.883 0.809 1.528 2.999 1.760 5.994 28.5 0.031 0.2 0.1 0.1 47.7% 2/5/2020 SN1-16 6.004 0.721 0.784 1.453 3.005 1.752 5.982 28.7 1.282 7.7 4.3 3.3 56.5% 2/5/2020 SN1-16 0.101 4.381 0.809 1.526 2.499 1.655 4.993 30.4 0.106 0.5 0.4 0.1 84.0% 2/5/2020 SN1-16 6.004 4.406 0.814 1.528 2.524 1.639 4.935 30.3 6.057 29.9 26.5 3.4 88.5% 2/6/2020 SN2 0.101 0.889 0.809 1.449 1.649 1.344 3.295 22.3 0.039 0.1 0.1 0.0 70.6% 2/6/2020 SN2 6.004 0.808 0.798 1.405 1.659 1.318 3.271 22.4 2.559 8.4 4.9 3.5 58.0% 2/6/2020 SN2 0.101 0.889 0.809 1.458 3.002 1.762 5.999 23.1 0.032 0.2 0.1 0.1 47.3% 2/6/2020 SN2 6.004 0.734 0.786 1.376 3.007 1.754 5.987 23.6 1.294 7.7 4.4 3.3 56.9% 2/6/2020 SN2 0.101 4.387 0.810 1.456 2.501 1.655 4.997 25.7 0.107 0.5 0.4 0.1 82.8% 2/6/2020 SN2 6.004 4.412 0.815 1.455 2.526 1.639 4.940 26.0 6.068 30.0 26.5 3.5 88.4% 2/5/2020 SN2-16 0.101 0.874 0.807 1.503 1.646 1.347 3.289 28.6 0.037 0.1 0.1 0.0 73.1% 2/5/2020 SN2-16 6.004 0.792 0.796 1.465 1.603 1.320 3.265 28.1 2.518 8.2 4.8 3.5 57.8% 2/5/2020 SN2-16 0.101 0.873 0.807 1.514 2.999 1.760 5.994 28.3 0.031 0.2 0.1 0.1 48.0% 2/5/2020 SN2-16 6.004 0.720 0.784 1.437 3.005 1.752 5.982 28.5 1.267 7.6 4.3 3.3 57.1% 2/5/2020 SN2-16 0.101 4.371 0.807 1.511 2.499 1.655 4.993 29.8 0.106 0.5 0.4 0.1 83.9% 2/5/2020 SN2-16 6.003 4.404 0.814 1.515 2.524 1.639 4.935 30.0 6.048 29.8 26.4 3.4 88.6% 2/6/2020 SN3-16 0.101 0.866 0.806 1.496 1.646 1.342 3.288 28.7 0.037 0.1 0.1 0.0 72.0% 2/6/2020 SN3-16 6.004 0.764 0.791 1.458 1.656 1.315 3.265 28.2 2.481 8.1 4.6 3.5 56.6% 2/6/2020 SN3-16 0.100 0.866 0.806 1.507 2.999 1.758 5.994 28.5 0.031 0.2 0.1 0.1 47.4% 2/6/2020 SN3-16 6.004 0.696 0.780 1.432 3.005 1.750 5.982 28.7 1.262 7.5 4.2 3.4 55.4% 2/6/2020 SN3-16 0.101 4.364 0.806 1.505 2.499 1.652 4.993 30.1 0.106 0.5 0.4 0.1 83.8% 2/6/2020 SN3-16 6.003 4.394 0.812 1.508 2.524 1.636 4.936 30.1 6.056 29.9 26.4 3.5 88.3% 2/6/2020 SN4 0.101 0.877 0.808 1.466 1.648 1.349 3.292 25.8 0.037 0.1 0.1 0.0 72.3% 2/6/2020 SN4 6.004 0.802 0.797 1.428 1.659 1.323 3.268 25.5 2.607 8.5 4.8 3.7 56.5% 2/6/2020 SN4 0.101 0.878 0.808 1.476 3.001 1.762 5.997 25.9 0.031 0.2 0.1 0.1 48.1% 2/6/2020 SN4 6.004 0.727 0.785 1.402 3.007 1.755 5.985 26.2 1.320 7.9 4.4 3.5 55.3% 2/6/2020 SN4 0.101 4.376 0.808 1.474 2.501 1.657 4.996 28.0 0.106 0.5 0.4 0.1 83.5% 2/6/2020 SN4 6.004 4.396 0.812 1.476 2.526 1.641 4.938 28.0 6.074 30.0 26.4 3.6 88.0% 2/5/2020 SN8 0.101 0.889 0.809 1.485 1.646 1.346 3.289 29.1 0.037 0.1 0.1 0.0 73.2% 2/5/2020 SN8 6.004 0.812 0.799 1.453 1.501 1.319 3.263 28.8 2.745 9.0 4.9 4.1 54.5% 2/5/2020 SN8 0.101 0.889 0.809 1.495 2.999 1.759 5.994 28.8 0.031 0.2 0.1 0.1 47.8% 2/5/2020 SN8 6.004 0.733 0.786 1.421 3.005 1.751 5.981 29.1 1.363 8.1 4.4 3.7 54.0% 2/5/2020 SN8 0.101 4.386 0.810 1.492 2.499 1.654 4.993 30.6 0.106 0.5 0.4 0.1 83.4% 2/5/2020 SN8 6.003 4.387 0.811 0.987 0.032 1.638 4.935 30.8 6.094 30.1 26.3 3.7 87.6% 2/5/2020 SN14 0.102 0.883 0.808 1.505 1.646 1.349 3.290 27.6 0.038 0.1 0.1 0.0 72.6% 2/5/2020 SN14 6.004 0.797 0.796 1.469 1.657 1.323 3.265 27.8 2.562 8.4 4.8 3.6 57.2% 2/5/2020 SN14 0.101 0.883 0.808 1.516 3.000 1.761 5.995 28.4 0.032 0.2 0.1 0.1 46.9% 2/5/2020 SN14 6.004 0.729 0.785 1.443 3.005 1.753 5.983 28.5 1.300 7.8 4.4 3.4 56.3% 2/5/2020 SN14 0.101 4.380 0.809 1.513 2.499 1.656 4.994 29.9 0.106 0.5 0.4 0.1 83.9% 2/5/2020 SN14 6.004 4.405 0.814 1.516 2.524 1.640 4.936 29.9 6.070 30.0 26.4 3.5 88.3%", + "partNumber" : " TPS50601A-SP", + "allResponseList" : [ { + "contentId" : "3288679", + "userName" : "Christian Yots", + "rankPoints" : "9520", + "rankName" : "Genius", + "date" : "Mar 17, 2020 3:17 PM", + "userId" : "32944", + "content" : "Hi, I can look into this but will need more information from you. The variation on the regulated output, and therefore, Vsense is highly dependent on the external circuitry of the converter. Could you please provide schematic for each scenario (target VOUT) including the ESR of the output capacitance being used. Also, please provide what regulation ripple you have designed for. You can send to me privately if you prefer not to post on this public forum. Thanks Christian" + }, { + "contentId" : "3299381", + "userName" : "Thomas Gati", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Mar 27, 2020 4:01 PM", + "userId" : "6301225", + "content" : "simulation POL Hybrid 1-0.pdf" + }, { + "contentId" : "3323240", + "userName" : "Christian Yots", + "rankPoints" : "9520", + "rankName" : "Genius", + "date" : "Apr 21, 2020 5:53 PM", + "userId" : "32944", + "content" : "Hi, From the schematic provided it appears you are targeting the following applications: VIN=3.3, 5V, 6V IOUT = 100mA, 6A Fswitching = 300kHz VOUT = 2.515V Can you confirm these are the target applications. The VOUT measured is not 2.5V as it should be indicating a gross problem. The compensation circuit in the schematic does not look correct for me. I estimate the following comp circuit. R9=12kohms C3=22nF C6=650pF Thanks Christian" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS50601A_2D00_SP", "/support/power-management/f/196/tags/TPS50601A_2D00_SP%2bLoad%2band%2bLine%2bregulation", "/support/power-management/f/196/tags/Vsense%2bvoltage%2bnot%2bconstant" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/889708.json b/data/json/DLP/889708.json new file mode 100644 index 0000000000000000000000000000000000000000..0ad092364fcf57748009282940f5c58897ac4474 --- /dev/null +++ b/data/json/DLP/889708.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "889708", + "reporterName" : "Rainer Koliwer", + "rankPoints" : "10", + "resolutionStatus" : "", + "ticketName" : "WEBENCH® Tools/LM3150: Customize LM3150MH/NOPB ‑ 19V-29V to 5.00V @ 7A, .......Message : Design update failed - Junction temperature is too high", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 54", + "queryText" : "Part Number: LM3150 Tool/software: WEBENCH® Design Tools We have planned to use the LM3150 in a project. We entered our data in the Power designer. VIN 19 to 29V, 60 ° C, Vout 5V, 7A. The Power Designer issues a circuit diagram proposal. So far so good. If we press the \"Redesign\" button, the message \"Design update failed - Junction temperature is too high\" always appears. However, nothing is apparent from the FET or IC where the junction temperature is too high. What does the message refer to?", + "partNumber" : " LM3150", + "allResponseList" : [ { + "contentId" : "3290844", + "userName" : "Vishwanath Tigadi", + "rankPoints" : "1240", + "rankName" : "Intellectual", + "date" : "Mar 19, 2020 5:00 AM", + "userId" : "4786829", + "content" : "Hi Rainer, We're looking into this. I'll keep you posted as soon as possible. Regards, Vishwanath" + }, { + "contentId" : "3302977", + "userName" : "Vishwanath Tigadi", + "rankPoints" : "1240", + "rankName" : "Intellectual", + "date" : "Apr 1, 2020 5:05 AM", + "userId" : "4786829", + "content" : "Hi Rainer, We're still working on this. I'll keep you posted on the proceedings. Regards, Vishwanath" + }, { + "contentId" : "3311143", + "userName" : "Vishwanath Tigadi", + "rankPoints" : "1240", + "rankName" : "Intellectual", + "date" : "Apr 9, 2020 5:28 AM", + "userId" : "4786829", + "content" : "Hi Rainer, We're still working on this. I'll keep you posted on when the changes will be available on . Regards, Vishwanath" + }, { + "contentId" : "3325266", + "userName" : "Bhushan Waghmare", + "rankPoints" : "2245", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 5:57 AM", + "userId" : "4633427", + "content" : "Hi Rainer, Thanks for your patience. Seems this is a bug. For your case the design should be fine. We have forwarded this to concerned team. We will get back to you once we have solution on this. Best Regards, Bhushan" + } ], + "tags" : [ "/support/power-management/f/196/tags/WEBENCH_AE00_%2bDesign%2bTools", "/support/power-management/f/196/tags/LM3150" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/889755.json b/data/json/DLP/889755.json new file mode 100644 index 0000000000000000000000000000000000000000..cd04b1450e1cccbd50ebeb415c71a6c131ef2d3e --- /dev/null +++ b/data/json/DLP/889755.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "889755", + "reporterName" : "cheng huang chou", + "rankPoints" : "540", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "AWR1642: AWR1642 Radar Monitoring Asynchronous Events lost", + "rankName" : "Intellectual", + "replies" : " 4", + "views" : " 40", + "queryText" : "Part Number: AWR1642 I set 8 Radar monitoring items, Temperature, Rx Gain Phase, Rx Noise Figure, IF stage, Tx0 power, Tx1 power, Tx0 ballbreak, Tx1 ballbreak, In MmwDemo_mssMmwaveEventCallbackFxn, I can not get the msgId (RL_RF_AE_MON_TEMPERATURE_REPORT_SB and RL_RF_AE_MON_RX_GAIN_PHASE_REPORT) but the other I can get correctly. What's wrong with this? Should I change rlRfCalMonTimeUntConf_t.calibMonTimeUnit? My SDK is mmwave_sdk_02_00_00_04 Thank You Liang-Yu", + "partNumber" : " AWR1642", + "allResponseList" : [ { + "contentId" : "3289957", + "userName" : "Cesar", + "rankPoints" : "52960", + "rankName" : "Guru", + "date" : "Mar 18, 2020 2:29 PM", + "userId" : "20288", + "content" : "Hi, The monitors may not be supported in the firmware version you are using. Please refer to the documentation of the firmware release. (Radar Interface Document in the DFP release) You probably should upgrade your application to use the latest firmware provided with SDK 3.3 thank you Cesar" + }, { + "contentId" : "3300180", + "userName" : "cheng huang chou", + "rankPoints" : "540", + "rankName" : "Intellectual", + "date" : "Mar 30, 2020 2:20 AM", + "userId" : "4108705", + "content" : "Hi, I have upgraded FW to the latest version (SDK 3.3), but MmwDemo_mssMmwaveEventCallbackFxn still does not have the Temperature and Rx Gain Phase report. How to fix this? Thank you Liang - Yu" + }, { + "contentId" : "3300302", + "userName" : "Jitendra Gupta", + "rankPoints" : "33995", + "rankName" : "Mastermind", + "date" : "Mar 30, 2020 6:27 AM", + "userId" : "1717369", + "content" : "Hello Liang - Yu, Could you refer mmwavelink test application from mmWave SDK which tests these two features. control\\mmwavelink\\test Regards, Jitendra" + }, { + "contentId" : "3328905", + "userName" : "cheng huang chou", + "rankPoints" : "540", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 2:32 PM", + "userId" : "4108705", + "content" : "Hi In mmwave Demo's dss_main.c, I add these functions ( rlRfTempMonConfig, rlRfRxGainPhMonConfig, ， rlRfRxNoiseMonConfig, rlRfRxIfStageMonConfig, rlRfTxPowrMonConfig, rlRfTxBallbreakMonConfig) in MmwDemo_dssDataPathConfigCQ. I still can't get temperature and Rx gain phase, but the other items can be received by MmwDemo_mssMmwaveEventCallbackFxn in mss_main.c. Is it correct to add these functions in here? Thank You Liang-Yu" + } ], + "tags" : [ "/support/sensors/f/1023/tags/AWR1642" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/890211.json b/data/json/DLP/890211.json new file mode 100644 index 0000000000000000000000000000000000000000..9c35448be636e0fe81402f9ec4b5fa319684fab8 --- /dev/null +++ b/data/json/DLP/890211.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "890211", + "reporterName" : "Will Brown", + "rankPoints" : "200", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS2493EVM-002: IMON spurious output", + "rankName" : "Prodigy", + "replies" : " 27", + "views" : " 160", + "queryText" : "Part Number: TPS2493EVM-002 I am evaluating the TSP2493 using the EVM-002 board. We plan to use the part with an MCU and monitor the output current, and use the UVEN line to control the output. During my testing, using the ENA/DIS switch on the PCB, I noted that sometimes the IMON output would go to full scale for about 200uS immediately after being enabled. To speed testing and eliminate any variables due to manual switching, I connected a signal generator to the UVEN line (see attached PDF). For this testing, no load was attached to the PCB. The only circuit elements present on VOUT are C3, C9 and D2 as indicated in the EVM schematic. What I then observed, is that depending on the PRF (repetition frequency), IMON either glitches, or does not glitch, immediately after UVEN goes high. For example, at 5.0Hz PRF, IMON behaves correctly when UVEN is asserted. At 5.1Hz, IMON goes full-scale for 200uS every time UVEN is asserted. I observed this behavior from as low as 0.7Hz, to as high as 20Hz, with variations in PRF from 0.01 to 0.1Hz causing a change in IMON behavior. There are 3 scope plots in the attached PDF. The two plots that show IMON indicate a small damped hump starting about 400uS after UVEN is asserted. This is the charging current of the capacitor(s) on VOUT. The third plot shows that VOUT has not begun to turn on yet when IMON goes full scale. All other signals (FAULT, PG, TIMER), maintain a steady value throughout the ON period. In other words, no other operation anomalies are observed, it seems that the IMON output is the only affected signal. TPS2493_IMON_Glitch.pdf Thanks for any insights, Will", + "partNumber" : " TPS2493EVM-002", + "allResponseList" : [ { + "contentId" : "3291406", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Mar 19, 2020 2:09 PM", + "userId" : "4743883", + "content" : "Hi Will, Thanks for reaching out! We have never observed that kind of behavior. Can you capture Vout, input current, UVEN, IMON in a single scope shot for the second test scenario where IMON pulse is observed and share it with us Thanks, Rakesh" + }, { + "contentId" : "3291417", + "userName" : "Will Brown", + "rankPoints" : "200", + "rankName" : "Prodigy", + "date" : "Mar 19, 2020 2:16 PM", + "userId" : "5920759", + "content" : "Thank you for the quick reply. I apologize that I do not have the appropriate test equipment to perform the measurement as requested. I have one additional piece of information which I dismissed but in retrospect may be important, and why you've never seen this. During my very initial tests, using just a power supply and active load, one of the two MOSFETS failed. It failed shorted Drain-Source (Gate/Source and Gate/Drain did not show a short). I desoldered the failed MOSFET, and have been testing since using the remaining MOSFET. The gate drive seems fine. I cannot explain what happened that cause the MOSFET to fail. It actually blew a blob of solder out from underneath it, when it heated quickly and then presumably failed. Part of the thermal pad appeared discolored... perhaps the part had a coating flaw or contamination causing lack of reflow to the land, and subsequent hot-spot. I assumed the TPS2493 was unaffected after this event, but perhaps whatever happened compromised the part somehow." + }, { + "contentId" : "3291513", + "userName" : "Will Brown", + "rankPoints" : "200", + "rankName" : "Prodigy", + "date" : "Mar 19, 2020 3:26 PM", + "userId" : "5920759", + "content" : "I should add that though I currently cannot capture 4 channels at once, the behavior I observe on the scope is very repeatable. For example Vout looks the same the entire time the PRF is set to cause the IMON glitch. How do you propose I measure the input current? I assume you mean a direct measurement using a current probe?" + }, { + "contentId" : "3292432", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Mar 20, 2020 11:38 AM", + "userId" : "4743883", + "content" : "Hi Will, Thanks for the additional background details. Do you have another TSP2493 device to replace on EVM and to check whether the behavior is repeatable or not? By this, we can also rule out that partial unknown damage for the original unit is not the cause. If you have current probe, measure the input current along with the IMON voltage to check whether they follow in time Best Regards, Rakesh" + }, { + "contentId" : "3292730", + "userName" : "Will Brown", + "rankPoints" : "200", + "rankName" : "Prodigy", + "date" : "Mar 20, 2020 3:32 PM", + "userId" : "5920759", + "content" : "Hi Rakesh, I will order a few new parts, or another EVM altogether, and report back. Continued testing shows everything else works as advertised (power limiting during startup, etc) Will" + }, { + "contentId" : "3292748", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Mar 20, 2020 3:44 PM", + "userId" : "4743883", + "content" : "Hi Will, What are your target specs and requirements. ? Can you have a look at TPS25982, TPS1663x devices and let me know what you think. Regards, Rakesh" + }, { + "contentId" : "3292778", + "userName" : "Will Brown", + "rankPoints" : "200", + "rankName" : "Prodigy", + "date" : "Mar 20, 2020 4:01 PM", + "userId" : "5920759", + "content" : "Hi Rakesh, Thanks for the recommendations. Based on our requirements, it doesn't appear either are suitable unfortunately. We are looking to run between 24-48V (surge to 50V), with up to 20A continuous current, with hardware-based fast transient overload protection, with slower MCU-based eFusing (i2t behavior). The application will have about 20 of these output channels, so keeping power dissipation low per channel is important for passive heat rejection which is also a requirement for us. I am looking at using the TPS2493 (or something equivalent) with an LM5050 ideal diode output in series (and a suitable TVS on the final output), with both controllers using NVMFS5C604NLWFAFT1G as the pass element. I am open to other topology or part number suggestions. This is what I've come up with after going through a previous design and prototype iteration, and new requirements being added (higher voltage, higher current, faster performance). Also perhaps worth mentioning, I am looking to protect the main power input using an LM5060 and 4x parallel of the above listed MOSFETs, to provide OVP shutdown and gross overcurrent protection, with 100A steady-state pass current. I just tested the LM5060 EVM and was happy with the performance. Thanks, Will" + }, { + "contentId" : "3293206", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Mar 21, 2020 10:08 AM", + "userId" : "4743883", + "content" : "Hi Will, LM5069 would be preferred over LM5060 device. LM5069 provides accurate overload protection, FET SOA protection (power limiting feature) and fast shutdown during short circuit events. The LM5060 is intended for applications where precise current sensing is not required, but some level of fault protection is needed. Examples are applications where inductance or impedance in the power path limits the current rise in a short circuit condition. Please refer 8.1.5 Overcurrent Fault in the datasheet. Please refer /lit/an/snva683/snva683.pdf for configuring the device for surge support Best Regards, Rakesh" + }, { + "contentId" : "3294153", + "userName" : "Will Brown", + "rankPoints" : "200", + "rankName" : "Prodigy", + "date" : "Mar 23, 2020 2:51 PM", + "userId" : "5920759", + "content" : "Hi Rakesh, I initially downselected to the 5060 vs the 5069 to eliminate the sense resistor, at the expense of a more uncontrolled current limit. I will re-evaluate based on your recommendation. Also, I have replacement TPS2493 parts coming, in addition to a new EVM. I will post results once they arrive and I can repeat the tests. Thanks Will" + }, { + "contentId" : "3306437", + "userName" : "Will Brown", + "rankPoints" : "200", + "rankName" : "Prodigy", + "date" : "Apr 3, 2020 7:04 PM", + "userId" : "5920759", + "content" : "Hi Rakesh, Sorry for the delay in getting back. There was an issue getting the package delivered with the current state of affairs. The new EVM behaves with the same spurious IMON output. I will attach a PDF with a graph of all the parameters of interest. Since I do not have a good way to probe the input current, I inserted a 10 Ohm resistor in series with Vin, and the measurement Vin represents the power supply output, and Vin' represents the input voltage to the TPS2493EVM board. As in my original post, I can elicit this response by actuating the ENABLE switch on the PCB. For my testing, I connected a signal generator to UV(EN), adjusted the frequency until the problem arose, and then performed scope captures at each point in the circuit, at all times monitoring IMON to ensure the behavior was still present. TPS2493_EVM.pdf Also attached is the Excel file with the raw data I collected. TPS2493_EVM.xlsx Thank you for any insights, Will" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS2493", "/support/power-management/f/196/tags/TPS2493EVM_2D00_002" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/890514.json b/data/json/DLP/890514.json new file mode 100644 index 0000000000000000000000000000000000000000..01d9aa849ff7219ef4228e6df910d9a2f5b297fa --- /dev/null +++ b/data/json/DLP/890514.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "890514", + "reporterName" : "Tejasweeni Zope", + "rankPoints" : "90", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ34110: initial steps to start communication with MCU", + "rankName" : "Prodigy", + "replies" : " 16", + "views" : " 93", + "queryText" : "Part Number: BQ34110 I am using BQ34110 ic for two LI-ion batteries. I am not getting any data for the commands such as DeviceType() , DeviceName() etc registers. Is there any configuration settings to be done before this. It would be helpful if I get complete step by step procedure to interface it as I wanted to have voltage, current , SOH, SOC information regarding my batteries.", + "partNumber" : " BQ34110", + "allResponseList" : [ { + "contentId" : "3292675", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Mar 20, 2020 3:05 PM", + "userId" : "1864278", + "content" : "I would suggest you take a look at the app note below. /lit/an/slua790/slua790.pdf Andy" + }, { + "contentId" : "3293637", + "userName" : "Tejasweeni Zope", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Mar 23, 2020 5:04 AM", + "userId" : "6306374", + "content" : "Thank you for quick reply. When I am trying to read DeviceType() data,it is showing only 0000 values than 0110. Can you send the implementation function of atleast single control command on stm32 micro controller ?" + }, { + "contentId" : "3294389", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Mar 23, 2020 5:01 PM", + "userId" : "1864278", + "content" : "Sorry, we don't provide the code. I would suggest you use the bqStudio to communicate with the gauge device, capture the sequence using a logic analyzer and implement the same sequence in your microcontroller. Andy" + }, { + "contentId" : "3298261", + "userName" : "Tejasweeni Zope", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Mar 26, 2020 5:08 PM", + "userId" : "6306374", + "content" : "Can I get the flowchart or any algorithm to get at least DeviceType() or DeviceName()? I had made successful communication with bq34110 ic but when i was trying to get DeviceType() , the responce should be 0x1001 in little endien format, but I don't get response like that. Also, I am confused that when I send 0X01 data to 0x00 control register address and 0x00 data to 0x01 control register address, I should get its respective DeviceType() response at 0x40 /0x41 address. Please correct me if I am wrong. This is the sequence I am following in my implementation." + }, { + "contentId" : "3298481", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Mar 26, 2020 8:36 PM", + "userId" : "1864278", + "content" : "We already provided all the details in the app note I provided before. Make sure you read through that app note and make good of the Advanced Coom tab to test the sequence. To get the right response for the DeviceType() MAC Subcommand, follow the steps below. ENTER: Start Register 3E, Bytes to Write 0100 and PRESS the Write button. The I2C words occur in the following order in the data stream: AA, 3E, 01, 00. ENTER: Start Register 40, Number of Bytes to Read 2 and PRESS the Read button. The I2C words occur in the following order in the data stream: AA, 40, AB, 10, 01" + }, { + "contentId" : "3303799", + "userName" : "Tejasweeni Zope", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 1, 2020 4:35 PM", + "userId" : "6306374", + "content" : "Hi Andy I followed steps given by you and got response as expected 0x0110 but when I tried for another sub command that is device name response is 00 D4 0B A9 0B FF FF in hex format and C C C C C C C in char format can u tell what is exactly missing here? also I dont have BQstudio with me . I am doing all my interfacing using i2c communication. Can I get default response values when perticular subcommand is used to cross check weather we are getting correct response or not" + }, { + "contentId" : "3304099", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 1, 2020 8:54 PM", + "userId" : "1864278", + "content" : "I can read back the correct device name in the bqStudio, which is the same as the ASCII characters mentioned in the TRM. You would need to check your code." + }, { + "contentId" : "3304530", + "userName" : "Tejasweeni Zope", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 2, 2020 7:01 AM", + "userId" : "6306374", + "content" : "Hi Andy I will again check it considering your suggestions. I have some basic queries which are not cleared through TRM 1. Can we access consecutive sub commands one after other in a sequence? If yes then is there any delay to be added in between? 2. Is it mandatory to perform factory calibration before accessing any sub command also? I understood that it is important for voltage ,current , temp, SOH etc commands. 3. Without doing any setting what is default state of ic (sealed or unsealed) and mode (normal, snooze, shutdown) ? 4. How to check default configuration status in IC before writing for any command? Thanks in advance." + }, { + "contentId" : "3305154", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 2, 2020 4:37 PM", + "userId" : "1864278", + "content" : "See my comments below. 1. Can we access consecutive sub commands one after other in a sequence? If yes then is there any delay to be added in between? [Andy] Yes. I would suggest you add a short delay (e.g. 3ms). 2. Is it mandatory to perform factory calibration before accessing any sub command also? I understood that it is important for voltage ,current , temp, SOH etc commands. [Andy] No. However, if you want the voltage, current or temperature readings to be accurate. I would suggest you do the calibration first. 3. Without doing any setting what is default state of ic (sealed or unsealed) and mode (normal, snooze, shutdown) ? 4. How to check default configuration status in IC before writing for any command? [Andy] I would suggest you get an EV2400 and use bqStudio to check the default configurations. With the proper tool and software, it is much easier to work the gauge device. Andy" + }, { + "contentId" : "3316538", + "userName" : "Tejasweeni Zope", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 15, 2020 11:30 AM", + "userId" : "6306374", + "content" : "Hello Andy, Thank you . Your suggestions was very helpful. With that reference, Can you help me more in things as bq34110 I2C note don't have that details: 1. I had evaluated default values of Pin control, Operation config A and design capacity registers as per guidelines. And now I wanted to change its values as per my design. I had followed following sequence: ------- calibration start ------- Data Flash Access Commands to Change the Pin control register as per bq34110 I2C note. ------- calibration end I wanted to check weather the new value is stored accurately or not, What sequence should I follow ? 2. What I learnt from TRM is that factory calibration is necessary to read voltage value, Do I need to set Pin control, Operation config A and design capacity etc before Board Offset, temp, voltage, current calibration? 3. Minimum which registers and parameters required to get at least voltage reading? If possible, please recommend page number of document where all these details are mentioned. Thanks in Advance." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ34110" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/890598.json b/data/json/DLP/890598.json new file mode 100644 index 0000000000000000000000000000000000000000..69c0d9f6da3710debf5b3c4c4d235d87e6c66137 --- /dev/null +++ b/data/json/DLP/890598.json @@ -0,0 +1,79 @@ +{ + "ticketNumber" : "890598", + "reporterName" : "Sajin M1", + "rankPoints" : "70", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ27441-G1: Average current and SOC measured by BQ27441 is not accurate", + "rankName" : "Prodigy", + "replies" : " 8", + "views" : " 60", + "queryText" : "Part Number: BQ27441-G1 Hi, I have a power section which is using BQ27441 as the fuel gauge to measure the status of a LiPo battery that has 4400 mAh capacity in total. The 4400 mAh capacity is achieved by connecting two identical 2200 mAh batteries in parallel. By the datasheet of the battery, the Maximum voltage is about 4.2V, the nominal voltage is 3.7V and the discharge cutoff voltage is 2.7V. The system parameters are listed below: Maximum charging current: 2.4A Maximum discharge current: 2A Minimum running voltage: 3.4V Maximum battery voltage: 4.2V Cutoff current: 160 mA the current sense resistor is 10 mOhm For this system we configured the following parameters in the fuel guage: BATTERY_CAPACITY = 4400 //4400 mAh battery will be connected TERMINATE_VOLTAGE = 3400 // 3400mV terminate voltage DESIGN_ENERGY = 16280 //16280 mWh design energy TAPER_RATE =275 FC set = 92% full charge set FC clear = 90% full charge clear TAPER_VOLTAGE =4160 Fortunately, the fuel gauge is measuring battery voltage and temperature at much better accuracy but it is not for average current and capacity. I am listing my issues and questions below: Issue 1: The current (Both Discharging and charging) measured by the fuel gauge was having an error of more than 8% (more than 200 mA), but after manually changing the CC gain from0.237 to 0.205 it is working properly now. but in the case of the remaining capacity and percentage of charge the there is a huge margin of error is there. Issue 2: The fuel gauge is showing 100 % of charge while charging even it is only at 3881 mAh and 0% before it is reaching the Terminate voltage (3.4V) Question1: I need to measure the capacity of the battery with much accuracy(less 1% error), what is the step for setting up the proper configuration for the fuel gauge to get the proper remaining capacity and percentage of charge?", + "partNumber" : " BQ27441-G1", + "allResponseList" : [ { + "contentId" : "3293106", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Mar 20, 2020 11:31 PM", + "userId" : "1864278", + "content" : "Hi Sanjin, I guess you should have received a report from the GPCCHEM. Could you share it with me? Thanks. Andy" + }, { + "contentId" : "3293164", + "userName" : "Sajin M1", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Mar 21, 2020 4:49 AM", + "userId" : "6275925", + "content" : "Hi Andy, Thank you for the reply. I am attaching the report with this mail please have a look4380.GPC_report.txt" + }, { + "contentId" : "3293338", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Mar 22, 2020 12:16 AM", + "userId" : "3528441", + "content" : "Hello Sajin, This is a ROM based gauge. There is no method to change the chemID. Are you able to upgrade to a bq27z561 flash based gauge that supports chemID programming?" + }, { + "contentId" : "3293356", + "userName" : "Sajin M1", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Mar 22, 2020 3:31 AM", + "userId" : "6275925", + "content" : "Hi kang, Thank you for your reply and sorry to say that we can't change the fuel gauge right now, we already manufactured some large quantities of boards. Is there any other way to optimize the SOC?" + }, { + "contentId" : "3293657", + "userName" : "Sajin M1", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Mar 23, 2020 5:44 AM", + "userId" : "6275925", + "content" : "By the datasheet, the total capacity of the battery is 4400 mAh, 16280 mWh and the cut off voltage is 2.7V and we are setting the same for the configuration of BQ27441, but for our design, we can't go up to 2.7V, we are stoping the discharge when the voltage reaches only 3.4V thereby we are not using the total 4400mAh or 16280 mWh. Will it be the cause for the issue?" + }, { + "contentId" : "3295974", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Mar 24, 2020 9:10 PM", + "userId" : "3528441", + "content" : "Hello Sajin, You will need to look at the Qpass register during the discharge. If it is not even 90% of the discharge vs. design capacity, I would recommend setting the terminate voltage to 3.4 volts if that's your system shutdown voltage." + }, { + "contentId" : "3316372", + "userName" : "Sajin M1", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 15, 2020 8:01 AM", + "userId" : "6275925", + "content" : "Hi Kang, We will test that thing that you have said about the Qpass register and update it with you. I have one more doubt is there, It is about the CC_GAIN. We had a current measurement accuracy issue previously and it was solved by altering the value in CC_GAIN register. But by going through the datasheet I got to know that CC_GAIN is no for customer usage and it is only for debugging purposes, so is that mean we can't alter the CC_GAIN value? Is it not the proper way to tackle the error in current sensing? If so what is the proper method?" + }, { + "contentId" : "3321955", + "userName" : "Dominik Hartl11", + "rankPoints" : "35875", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 8:54 PM", + "userId" : "9849", + "content" : "You can change CC_GAIN. It is not restricted to debugging only. About gauge accuracy: The gauge uses the built in ChemID to run discharge simulations. You must complete a successful learning cycle where the gauge can measure QMax and cell impedance. This requires accurate current measurements. A learning cycle is basically a series of controlled charge/relax/discharge/relax sequences. See /how-perform-successful-learning-cycle-gauges Once the gauge learned these properties, it will be as accurate as the built-in ChemID allows for the cell that you use. Make sure that you configure charge termination correctly (you use C/27.5 but a C/25 with a taper rate of 250 is more appropriate for your taper current - the guideline is 15% more current than your taper current to make sure that the gauge detects charge termination reliably). Also verify that the discharge/charge and quit current thresholds are compatible with your application. The gauge must be in the correct state (charge/discharge/relax) for this to work." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ27441_2D00_G1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/890620.json b/data/json/DLP/890620.json new file mode 100644 index 0000000000000000000000000000000000000000..383eb6452da017a4684d90915db1ce0adda0ab95 --- /dev/null +++ b/data/json/DLP/890620.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "890620", + "reporterName" : "Alex Bhandari-Young", + "rankPoints" : "15670", + "resolutionStatus" : "Resolved", + "ticketName" : "[FAQ] Ambient Light Sensors: List of all FAQs", + "rankName" : "Genius", + "replies" : " 1", + "views" : " 404", + "queryText" : "", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3293072", + "userName" : "Alex Bhandari-Young", + "rankPoints" : "15670", + "rankName" : "Genius", + "date" : "Mar 20, 2020 10:16 PM", + "userId" : "4691324", + "content" : "Comparing Devices [FAQ] OPT3004: OPT3001 vs OPT3004, what is the difference? [FAQ] OPT3001: OPT3001 vs OPT3002 Optics [FAQ] OPT3001: OPT300X Family Parts: Industrial design of light sensor with cover glass/window opening [FAQ] OPT3001: What is the f1' value of the OPT3001? [FAQ] OPT3001: What is important and what are some key care-abouts when I design a light-sensitive user interface? Electrical [FAQ] OPT3001: Is there leakage on SDA and SCL if the pull-up supply is active and the power supply is not? Software [FAQ] OPT300X Family Parts: What are the available drivers for TI's family of ambient light sensors? [FAQ] OPT3001: Is there example raspberry pi code for the OPT3001? [FAQ] OPT3001: Do Linux/Android drivers exist for the OPT3001? [FAQ] OPT3001: Is there MSP430 code for use with the OPT3001? Mechanical/Assembly ALS OPT300x Handling Instructions [FAQ] OPT3001: Where is the STEP model (.STP) for the OPT3001? Performance/Accuracy [FAQ] OPT3001: What is the performance under flickering LED Light [FAQ] OPT3001: What is the accuracy of an OPT300x part? [FAQ] OPT3001: Why does the OPT3001 not have any data taken outside, under sunlight? [FAQ] OPT3001: Why does the OPT3001 not have a range that measures full sunlight at 130Klux? EVM [FAQ] OPT3001: Are the OPT3001EVM PCB files available? [FAQ] OPT3001: Debugging connection issues with the OPT3001EVM" + } ], + "tags" : [ "/support/sensors/f/1023/tags/OPT3001EVM", "/support/sensors/f/1023/tags/OPT3001", "/support/sensors/f/1023/tags/OPT3006", "/support/sensors/f/1023/tags/OPT3004", "/support/sensors/f/1023/tags/OPT3002", "/support/sensors/f/1023/tags/OPT3007" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/890626.json b/data/json/DLP/890626.json new file mode 100644 index 0000000000000000000000000000000000000000..8c480617b3657ddad33b1e6db3bab53f160be182 --- /dev/null +++ b/data/json/DLP/890626.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "890626", + "reporterName" : "Ning T", + "rankPoints" : "15365", + "resolutionStatus" : "Resolved", + "ticketName" : "[FAQ] BQ25606: Schematic Review and PCB Layout Design Tips", + "rankName" : "Genius", + "replies" : " 1", + "views" : " 197", + "queryText" : "Part Number: BQ25606 Please refer to the document below for Schematic Review and PCB Layout Design Tips for BQ25606. The selection of an external component can be either Required or Optional: Required - Absolutely required for proper operation Optional - Optional components Using this information, customer can reduce external components based on their application, as well as use this document to help in assisting with schematic reviews.", + "partNumber" : " BQ25606", + "allResponseList" : [ { + "contentId" : "3293092", + "userName" : "Ning T", + "rankPoints" : "15365", + "rankName" : "Genius", + "date" : "Mar 20, 2020 11:00 PM", + "userId" : "145100", + "content" : "BQ25606_SchematicChecklist V1p0.pdf Thank you very much, Ning." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25606" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/890672.json b/data/json/DLP/890672.json new file mode 100644 index 0000000000000000000000000000000000000000..54322bfde3536a4eacb7ba49e1c4d3eeeb61dd17 --- /dev/null +++ b/data/json/DLP/890672.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "890672", + "reporterName" : "reza nouriyan", + "rankPoints" : "100", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ25713: Charger can’t charge continuously", + "rankName" : "Prodigy", + "replies" : " 6", + "views" : " 75", + "queryText" : "Part Number: BQ25713 Hi dear I am using BQ25713 in order to charge 4 cell battery with 5v USB power banks All default values of registers are fine to me. I just want to charge cells with 1.2 ampere and be able to charge again when adapter is removed and plugged again. I just set my desired current to 0x02 and 0x03 and charger starts to charge but after less than a second charger stops charging. Here are my questions: 1) i was not able to do previously described procedure with 5v USB power bank and i did it with power supply. Why is that ? As i understood charger had to set all offsets and initializes with respect to input voltage without help of host. So why it didn’t charge cells with 5v? 2) did i something wrong to charge with 1.2A ? And why charger stops charging fast", + "partNumber" : " BQ25713", + "allResponseList" : [ { + "contentId" : "3293324", + "userName" : "reza nouriyan", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Mar 21, 2020 9:26 PM", + "userId" : "5241641", + "content" : "When i put charge current at almost 100mA it works but for greater currents charger stops charging in less than a second" + }, { + "contentId" : "3293350", + "userName" : "reza nouriyan", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Mar 22, 2020 2:47 AM", + "userId" : "5241641", + "content" : "Please take into account that i didn’t change any register after POR and just updated charge current register. I assumed that charger will update input voltage and current limit registers automatically when an adapter plugged vmax charge and vmin sys default values are ok to me. Is there a way to disable DPM mode that decrease charge current to give priority to system load. Because i think problem is related to this issue. But on the other hand i am testing IC at no load so there is no load to draw current from VSYS. I am completely confused Please help" + }, { + "contentId" : "3294086", + "userName" : "Joel Hernandez II", + "rankPoints" : "25800", + "rankName" : "Mastermind", + "date" : "Mar 23, 2020 2:05 PM", + "userId" : "4615895", + "content" : "Hey Reza, We need a register dump the moment before and the moment after the charger stops charging. A waveform is also necessary, showing VBUS, IBUS, SW2, and VSRN. Regards, Joel H" + }, { + "contentId" : "3295242", + "userName" : "reza nouriyan", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Mar 24, 2020 10:17 AM", + "userId" : "5241641", + "content" : "Dear Joel hi, thanks for reply unfortunately i am not able to check waveform and share with you but i have found out that when i write some values to charge current register BQ doesn't charge batteries but for some other values it starts charging but also in this way charging current is not same as i wrote it. which registers do you want to know before and after. just let me know thanks again best regards" + }, { + "contentId" : "3298018", + "userName" : "Joel Hernandez II", + "rankPoints" : "25800", + "rankName" : "Mastermind", + "date" : "Mar 26, 2020 2:15 PM", + "userId" : "4615895", + "content" : "Hey reza, I would like to see all charger registers before an after. Regards, Joel H" + }, { + "contentId" : "3322715", + "userName" : "Peter Sammer", + "rankPoints" : "10", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 12:31 PM", + "userId" : "3983126", + "content" : "Hi! Check the watchdog timer in ChargeOption0 register (I2C address = 01/00h) - WDTMR_ADJ. The default setting stops charging after 175s without repeatedly sending the charge current. You can disable the watchdog by setting 00 for bits 6-5 - then the charging will not stop when you don't send the current register. Best, P" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25713" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/890769.json b/data/json/DLP/890769.json new file mode 100644 index 0000000000000000000000000000000000000000..03d7f92859a1d0a64145d4cb780a3240bf09642b --- /dev/null +++ b/data/json/DLP/890769.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "890769", + "reporterName" : "Dmitry Sinyukov", + "rankPoints" : "80", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ24070: BQ24070: No charge termination status is activated and interference with step-up converter on payload side", + "rankName" : "Prodigy", + "replies" : " 14", + "views" : " 88", + "queryText" : "Part Number: BQ24070 Hello! 1. Please can you help me to check my schematic and understand BQ24070 behavior in charge termination mode? The problem is charge termination status is not activated for hours (checked for 10h at least) on fully charged battery or w/o battery connected. I didn't ever saw any other status than STAT1=ON and STAT2=OFF. Control resistors are adjusted to the values: Rdppm=37k, Rset=3.54k, Rtmr=50k. Voltage at ISET1 pin and battery charge current are goes to zero at the end of charge and Vbat is 4.21V if no load connected (as red cross on the drawing show). 2. When I add a payload with a step-up converter (U2 L6920D) I also faced with a sort of interference on BQ24070. I get a voltage drop about 0.4V at BQ24070 OUT pin at each step-up converter cycle (see the diagram below). In that case, I have a noise about 50mV at ISET1 pin and battery final voltage increase on 0.01V. And I have no idea how to handle with that voltage drops caused by step-up converter. Please give me a guess. Best regards, Dmitry", + "partNumber" : " BQ24070", + "allResponseList" : [ { + "contentId" : "3294275", + "userName" : "Anthony P Pham", + "rankPoints" : "1890", + "rankName" : "Intellectual", + "date" : "Mar 23, 2020 3:56 PM", + "userId" : "6169362", + "content" : "Hi Dmitry, Just to get a better understanding of your problem, is the information you provided for when ISET2 and MODE are HIGH or LOW?" + }, { + "contentId" : "3294352", + "userName" : "Dmitry Sinyukov", + "rankPoints" : "80", + "rankName" : "Prodigy", + "date" : "Mar 23, 2020 4:43 PM", + "userId" : "4895097", + "content" : "Hi Anthony, thank you for reply! ISET2 and MODE are both HIGH for my setup. Best regards, Dmitry" + }, { + "contentId" : "3294369", + "userName" : "Raheem", + "rankPoints" : "16655", + "rankName" : "Genius", + "date" : "Mar 23, 2020 4:49 PM", + "userId" : "4697250", + "content" : "Hello, WHat is the state of MOde and ISET2?" + }, { + "contentId" : "3294498", + "userName" : "Dmitry Sinyukov", + "rankPoints" : "80", + "rankName" : "Prodigy", + "date" : "Mar 23, 2020 6:24 PM", + "userId" : "4895097", + "content" : "Hi Raheem, thank you for reply! ISET2 and MODE are both HIGH for my setup. Best regards, Dmitry" + }, { + "contentId" : "3301210", + "userName" : "Anthony P Pham", + "rankPoints" : "1890", + "rankName" : "Intellectual", + "date" : "Mar 30, 2020 7:30 PM", + "userId" : "6169362", + "content" : "Hi Dmitry, Just to check that the device is operating correctly, as I don't think I see any problems with your schematic, does the device show proper current when in fast charge mode (for instance when the battery is a 3.5V)?" + }, { + "contentId" : "3304040", + "userName" : "Dmitry Sinyukov", + "rankPoints" : "80", + "rankName" : "Prodigy", + "date" : "Apr 1, 2020 8:14 PM", + "userId" : "4895097", + "content" : "Hi Anthony, yes it is. I have discharge my battery down to 3.4V, switch on DC supply, and check battery charge current. It was constant 0.3A as it should be for my Rset value, till ~4V at the battery. I left my setup switched on during the night and have found at the next morning both status LEDs are off, so finally charging was stopped by timer for the first time. But I still had a small charging current about 1mA at my battery and voltage was about 4.3V. Then I made just an off-on cycle at DC supply and have got STAT1=ON signal again for a whole day as usual. But charge current is zero now. It looks like completely broken logic, but I can't understand why. I'm continue some more experiments... Best regards, Dmitry" + }, { + "contentId" : "3304126", + "userName" : "Anthony P Pham", + "rankPoints" : "1890", + "rankName" : "Intellectual", + "date" : "Apr 1, 2020 9:26 PM", + "userId" : "6169362", + "content" : "Dmitry, Would you be able to monitor the voltage TMR pin and see how that is operating as the current drops below 30mA (calculated termination current)? Do you also see the same behavior with higher RSET values?" + }, { + "contentId" : "3305262", + "userName" : "Dmitry Sinyukov", + "rankPoints" : "80", + "rankName" : "Prodigy", + "date" : "Apr 2, 2020 6:05 PM", + "userId" : "4895097", + "content" : "Anthony, I repeated a charge cycle today (but disconnected a payload from BQ24070 now, pure charger). Voltage at TMR pin was 2.51V from the beginning of current regulation phase till Vbat rised about 4.1V and then it began to drop down to 722mV on fully charged battery. V_TMR was 725mV when charge current dropped below 30mA. In this cycle STAT1 signal stalled again, I waited 12 hours and it still show charging, but charge current is zero now. I will increase charge current from 0.3A to 0.6A tomorrow and test it again. UPDATE: I have increased charge current twice to 0.6A - absolutely the same voltage at TMR pin as I described above. STAT1 signal went OFF after 10 hours indicating charge time is out. Charge current is zero. No indication of finished charge by STAT2. Best Regards, Dmitry" + }, { + "contentId" : "3309334", + "userName" : "Raheem", + "rankPoints" : "16655", + "rankName" : "Genius", + "date" : "Apr 7, 2020 5:25 PM", + "userId" : "4697250", + "content" : "Hello, Can you swap out the battery and use a sourcemeter instead on BAT pin WHat voltage do you measure on ISET1 pin when the battery voltage is around 4.2V? Also, can you try removing the C4 capacitor and see if that makes a difference? From the schematic, can you have the LEDs be pulled up to OUT instead of IN" + }, { + "contentId" : "3310751", + "userName" : "Dmitry Sinyukov", + "rankPoints" : "80", + "rankName" : "Prodigy", + "date" : "Apr 8, 2020 7:19 PM", + "userId" : "4895097", + "content" : "Hello, Raheem! Can you swap out the battery and use a sourcemeter instead on BAT pin Sorry, I don't have this type of tool. But I checked charge cycle with two different batteries: 1000mAh flat LiPo protected cell and 18650 2200mAh unprotected NCM cell. In both cases BQ behaves absolutely same. WHat voltage do you measure on ISET1 pin when the battery voltage is around 4.2V? 0V (zero) Also, can you try removing the C4 capacitor and see if that makes a difference? No difference. From the schematic, can you have the LEDs be pulled up to OUT instead of IN I just performed this modification: nothing changed. Best regards, Dmitry" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24070" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/891022.json b/data/json/DLP/891022.json new file mode 100644 index 0000000000000000000000000000000000000000..52bef10f22c6ee01c7cdd32be60e4a65f23ef68d --- /dev/null +++ b/data/json/DLP/891022.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "891022", + "reporterName" : "Mark Ackerson", + "rankPoints" : "9465", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ20Z655-R1: Voltage Error", + "rankName" : "Genius", + "replies" : " 10", + "views" : " 46", + "queryText" : "Part Number: BQ20Z655-R1 Customer is bringing up 4S1P battery pack design using BQ20Z655-R1. They are seeing the voltage reading on each of the 4 cells droop in software (BQ Evaluation Software). Each cell is at 3.43V (all within 5mV). When they do a software reset (Manuf Access Code 0x41), then SW will read the appropriate voltage, but quickly droop to something like 2V on an exponential decay. Even when overriding FETs to allow 1A charge, they still see the individual cell voltages drop after a reset. They confirmed cell measurements (and at input to IC) are all consistent with 3.43V (under rest) and >3.5V charging. Customer is using BQ20Z655-R1 on 3S1P pack and it works fine. To note, they have not written the GG file yet, but am working on that now. Any guidance you can provide would be greatly appreciated! Regards, Mark", + "partNumber" : " BQ20Z655-R1", + "allResponseList" : [ { + "contentId" : "3294704", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Mar 23, 2020 10:11 PM", + "userId" : "1864278", + "content" : "Hi Mark, Did the customer use an EVM? Did they do the calibration? Andy" + }, { + "contentId" : "3294713", + "userName" : "Mark Ackerson", + "rankPoints" : "9465", + "rankName" : "Genius", + "date" : "Mar 23, 2020 10:22 PM", + "userId" : "1823646", + "content" : "Hi Andy, Apparently EVMs are no longer available. That was our first thought. What’s the easiest method for doing the calibration? Regards, Mark" + }, { + "contentId" : "3295980", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Mar 24, 2020 9:16 PM", + "userId" : "1864278", + "content" : "Hi Mark, See Section 9 of the bq20z655EVM User's Guide. Andy" + }, { + "contentId" : "3297025", + "userName" : "Mark Ackerson", + "rankPoints" : "9465", + "rankName" : "Genius", + "date" : "Mar 25, 2020 5:38 PM", + "userId" : "1823646", + "content" : "Thanks Andy!" + }, { + "contentId" : "3297032", + "userName" : "Mark Ackerson", + "rankPoints" : "9465", + "rankName" : "Genius", + "date" : "Mar 25, 2020 5:43 PM", + "userId" : "1823646", + "content" : "Hi Andy, The customer tried calibrating albeit with cells attached and monitoring the overall voltage (each cell is pretty tightly balanced). And immediately after calibration, voltages seemed okay, but again drifted apart. I’m curious how calibration might resolve the voltage decay issue. What else should we try? BQ20Z655EVM is EOL. Please advise. Thanks, Mark" + }, { + "contentId" : "3297066", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Mar 25, 2020 6:10 PM", + "userId" : "3528441", + "content" : "Hello Mark, Can the customer send a log file of the voltage drift after calibration?" + }, { + "contentId" : "3297152", + "userName" : "Mark Ackerson", + "rankPoints" : "9465", + "rankName" : "Genius", + "date" : "Mar 25, 2020 7:34 PM", + "userId" : "1823646", + "content" : "Hi Kang, Attached is the log from immediately after calibrating. Regards, Mark voltage testing.log" + }, { + "contentId" : "3297198", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Mar 25, 2020 8:19 PM", + "userId" : "1864278", + "content" : "Hi Mark, I would suggest your customer try a resistor cell simulator instead of battery cells and see if the same issue still occurs. See the screenshot below. Andy" + }, { + "contentId" : "3317221", + "userName" : "Mark Ackerson", + "rankPoints" : "9465", + "rankName" : "Genius", + "date" : "Apr 15, 2020 8:11 PM", + "userId" : "1823646", + "content" : "Hi Andy, Sorry for the delay in responding. The customer tested using 10K resistors, but guessing that shouldn’t matter. What else can they try? Do you notice anything unusual in the logs? Regards, Mark" + }, { + "contentId" : "3321965", + "userName" : "Dominik Hartl11", + "rankPoints" : "35875", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 9:02 PM", + "userId" : "9849", + "content" : "I also checked the log file. Besides the voltages that drop, there isn't anything in the log that sticks out. But yes, these voltages are troublesome. Is that just on one board or is that a problem with several boards/gauges?" + } ], + "tags" : [ "/support/power-management/f/196/tags/bq20z655_2D00_r1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/891082.json b/data/json/DLP/891082.json new file mode 100644 index 0000000000000000000000000000000000000000..c5171bc5495b24b8abd07b6d3e46ca365615409e --- /dev/null +++ b/data/json/DLP/891082.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "891082", + "reporterName" : "Alain Roger", + "rankPoints" : "60", + "resolutionStatus" : "", + "ticketName" : "BQ25703A: Reinitialization impossible to 1S-4S cell default values", + "rankName" : "Prodigy", + "replies" : " 10", + "views" : " 73", + "queryText" : "Part Number: BQ25703A Hello, I had an electronic module bq25703a working fine, but some days ago the charger would not start and no adc measurement are possible. I used to initialize the module by resetting all registers by 0x35[6] = 1, and then setting 0x05/04[15…0] = 0 to reset MaxChargeVoltage to 4S default value. After initialization, I used to charge the battery by setting 0x05/04[15…0] = 7680mV. Now everytime I send 0x05/04[15…0] = 0, the register remains at previous value non-null value set. There is no way to get 4S cell default value that is 16800 mV. I have the same problem with MinSystemVoltage 0x0D/0C which should be 12288 mV at the end of initialization. I join an history of the I2C register. During init I send one time 0x05/04[15…0] = 0 and just before end of init, 0x05/04[15…0] = 7680mV whereas it should be 16800mV. Please can you tell me if a register value may prevent the reinitialization to 4S default values after POR ? Thank you, The history of the I2C register is the following I2C register listing. From first line to «EndInit … Endinit» is the register state before entering repeatitive task. The register state is displayed another time and then only modifications are listed. At t=23:58:05.939, Vadapter is set at 5V and input is open at 23:58:52.919. 23:57:53.505 -> 0 : 1110 23:57:53.550 -> 1 : 10 23:57:53.550 -> 2 & 3 ChargeCurrentRqst : 0 mA 23:57:53.550 -> 4 & 5 ChargeVoltageRqst: 7680 mV 23:57:53.550 -> 6 : 0 23:57:53.550 -> 7 : 0 23:57:53.550 -> 8 : 0 23:57:53.550 -> 9 : 0 23:57:53.550 -> A & B minInVoltRqst: 3200 mV 23:57:53.550 -> A & B minInVoltRqst: 3200 mV 23:57:53.550 -> C & D minSystVoltRqst: 0 mV 23:57:53.550 -> C & D minSystVoltRqst: 0 mV 23:57:53.550 -> E & F maxInputCurrent: 3300 mA 23:57:53.550 -> E & F maxInputCurrent: 3300 mA 23:57:53.550 -> 20 : 0 23:57:53.550 -> 21 : 100000 23:57:53.550 -> 22 : 1 23:57:53.550 -> 23 : 0 23:57:53.550 -> 24 : 0 23:57:53.550 -> 25 inputCurrentDPM: 3300 mA 23:57:53.550 -> 26 : 0 23:57:53.550 -> 27 inputVoltMeas: 3200 mV 23:57:53.550 -> 28 dischrgCurrentMeas: 0 mA 23:57:53.550 -> 29 chrgCurrentMeas: 0 mA 23:57:53.550 -> 2A : 0 23:57:53.550 -> 2B inputCurrentMeas: 0 mA 23:57:53.550 -> 2C battVoltMeas: 2880 mV 23:57:53.550 -> 2D systVoltMeas: 3200 mV 23:57:53.550 -> 2E : 1000000 23:57:53.550 -> 2F : 1111000 23:57:53.550 -> 30 : 0 23:57:53.550 -> 31 : 10 23:57:53.550 -> 32 : 1110010 23:57:53.550 -> 33 : 10 23:57:53.550 -> 34 : 0 23:57:53.550 -> 35 : 0 23:57:53.550 -> 36 : 111100 23:57:53.550 -> 37 : 1001010 23:57:53.550 -> 38 : 0 23:57:53.550 -> 39 : 10000001 23:57:53.550 -> 3A : 11111111 23:57:53.550 -> 3B : 10100000 23:57:53.550 -> bq25703a digout: not_proc_hot/ChrgOK : 0 23:57:53.550 -> EndInit EndInit EndInit EndInit EndInit EndInit EndInit 23:57:53.781 -> 0 : 1110 23:57:53.781 -> 1 : 10 23:57:53.781 -> 2 & 3 ChargeCurrentRqst : 0 mA 23:57:53.781 -> 4 & 5 ChargeVoltageRqst: 7680 mV 23:57:53.781 -> 6 : 0 23:57:53.781 -> 7 : 0 23:57:53.781 -> 8 : 0 23:57:53.781 -> 9 : 0 23:57:53.781 -> A & B minInVoltRqst: 3200 mV 23:57:53.781 -> A & B minInVoltRqst: 3200 mV 23:57:53.781 -> C & D minSystVoltRqst: 0 mV 23:57:53.781 -> C & D minSystVoltRqst: 0 mV 23:57:53.781 -> E & F maxInputCurrent: 3300 mA 23:57:53.781 -> E & F maxInputCurrent: 3300 mA 23:57:53.781 -> 20 : 0 23:57:53.781 -> 21 : 100000 23:57:53.781 -> 22 : 0 23:57:53.781 -> 23 : 0 23:57:53.781 -> 24 : 0 23:57:53.781 -> 25 inputCurrentDPM: 3300 mA 23:57:53.781 -> 26 : 0 23:57:53.781 -> 27 inputVoltMeas: 3200 mV 23:57:53.781 -> 28 dischrgCurrentMeas: 0 mA 23:57:53.781 -> 29 chrgCurrentMeas: 0 mA 23:57:53.781 -> 2A : 0 23:57:53.781 -> 2B inputCurrentMeas: 0 mA 23:57:53.781 -> 2C battVoltMeas: 2880 mV 23:57:53.781 -> 2D systVoltMeas: 3200 mV 23:57:53.781 -> 2E : 1000000 23:57:53.781 -> 2F : 1111000 23:57:53.781 -> 30 : 0 23:57:53.781 -> 31 : 10 23:57:53.781 -> 32 : 1110010 23:57:53.781 -> 33 : 10 23:57:53.781 -> 34 : 0 23:57:53.781 -> 35 : 0 23:57:53.781 -> 36 : 111100 23:57:53.781 -> 37 : 1001010 23:57:53.781 -> 38 : 0 23:57:53.781 -> 39 : 10000001 23:57:53.781 -> 3A : 11111111 23:57:53.781 -> 3B : 10100000 23:58:05.839 -> 31 : 10 23:58:05.839 -> 32 : 1110010 23:58:05.839 -> 33 : 10 23:58:05.839 -> 34 : 0 23:58:05.839 -> 35 : 0 23:58:05.839 -> 36 : 111100 23:58:05.839 -> 37 : 1001010 23:58:05.839 -> 38 : 0 23:58:05.839 -> 39 : 10000001 23:58:05.839 -> 3A : 11111111 23:58:05.839 -> 3B : 10100000 23:58:05.839 -> 31 : 10 23:58:05.839 -> 32 : 1110010 23:58:05.839 -> 33 : 10 23:58:05.839 -> 34 : 0 23:58:05.839 -> 35 : 0 23:58:05.839 -> 36 : 111100 23:58:05.839 -> 37 : 1001010 23:58:05.839 -> 38 : 0 23:58:05.839 -> 39 : 10000001 23:58:05.839 -> 3A : 11111111 23:58:05.839 -> 3B : 10100000 23:58:05.939 -> 21 : 10100000 23:58:05.939 -> bq25703a digout: not_proc_hot/ChrgOK : 1 23:58:06.072 -> C & D minSystVoltRqst: 1280 mV 23:58:06.105 -> E & F maxInputCurrent: 1150 mA 23:58:06.105 -> 25 inputCurrentDPM: 1150 mA 23:58:06.837 -> 3B : 11100000 23:58:12.359 -> 2 & 3 ChargeCurrentRqst : 64 mA 23:58:15.560 -> 2 & 3 ChargeCurrentRqst : 128 mA 23:58:52.919 -> 21 : 100000 23:58:52.919 -> 25 inputCurrentDPM: 3300 mA 23:58:52.919 -> bq25703a digout: not_proc_hot/ChrgOK : 0 23:58:53.085 -> 2 & 3 ChargeCurrentRqst : 0 mA 23:58:53.085 -> E & F maxInputCurrent: 3300 mA", + "partNumber" : " BQ25703A", + "allResponseList" : [ { + "contentId" : "3295810", + "userName" : "Joel Hernandez II", + "rankPoints" : "25800", + "rankName" : "Mastermind", + "date" : "Mar 24, 2020 6:07 PM", + "userId" : "4615895", + "content" : "Hey Alain, Does this happen on every charger you have, or just on this single device? Does it no longer respond to any of your I2C commands? Or can you still write a sequence, but all subsequent commands are ignored? Regards, Joel H" + }, { + "contentId" : "3296065", + "userName" : "Alain Roger", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Mar 24, 2020 11:39 PM", + "userId" : "6152039", + "content" : "Hello, The problem happens on my prototype, it is a single device before producing some more. All commands sent to the bq25703a seem to be correctly set when they are read back, except the commands that should get default values according 1S-4S cell configuration : MinSystemVoltage 0x0D/0x0C and MaxChargeVoltage 0x05/0x04 after POR. Also when I command 0x05/0x04 = 0, it should « set REG0x05/04() to default value on CELL_BATPRESZ pin» but in fact the register keeps previous value. Then there is no charging whereas 21[7] gets to 1 as Vbus get above 3.2V, 0x0F/0x0E is set to 1150 mA and 0x05/0x04 is set to 7680 mV. Also 0x3B[6] set to 1 does not start any adc measurement. I am wondering if there are some register commands that force to ignore CELL_BATPRESZ pin, so no reinitialization to CELL_BATPRESZ default values are possible ?" + }, { + "contentId" : "3298023", + "userName" : "Joel Hernandez II", + "rankPoints" : "25800", + "rankName" : "Mastermind", + "date" : "Mar 26, 2020 2:20 PM", + "userId" : "4615895", + "content" : "Hey Alain, If you write the RESET_REG bit in ChargeOption3() bit 6, do the values return to their default state? I also wonder if any functions of the charger are operating. Do you have as schematic you can provide of your board? What do you do to POR the charger? Do you remove both VBUS and VBAT? Regards, Joel H" + }, { + "contentId" : "3298376", + "userName" : "Alain Roger", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Mar 26, 2020 6:53 PM", + "userId" : "6152039", + "content" : "Hello, In order to perform a POR, I remove first VBUS and then VBAT. Then when I want to use again the converter, I start to plug VBAT and I wait a little before plugging in VBUS. I did try to restart the bq25703a and then 13s later I plug VBUS and then I sent a RESET_REG 1 minute later. I did also another test : I restart the bq25703a and then 1 minute and a half later I send a RESET_REG. In both cases, register 0x01, 0x30, 0x32, 0x36, 0x38, 0x3A and 0x3B get updated to default values. But 0x05/04[15…0] MaxChargeVoltage and 0x0D/0x0C MinSystemVoltage do not get default values. I join you the I2C evolution of both experiments, and also a schematic I did for the module. I hope it may help, Vincent ResetWhileNotCharging.txtResetWhileCharging.txt" + }, { + "contentId" : "3299335", + "userName" : "Joel Hernandez II", + "rankPoints" : "25800", + "rankName" : "Mastermind", + "date" : "Mar 27, 2020 3:23 PM", + "userId" : "4615895", + "content" : "hey Alain, I noticed in your register dumps that you set VSYSMIN to 0mV during your initialization. And I also notice you don't read 0x20 later in the register dump, only 0x21. I have a suspicion that your 0mV is tripping the SYS SHORT protection, and preventing those two reigsters from being set. Additionally, I would have you compare your schematic against our checklist here in this FAQ: Regards, Joel H" + }, { + "contentId" : "3299506", + "userName" : "Alain Roger", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Mar 27, 2020 5:49 PM", + "userId" : "6152039", + "content" : "Hello, Thanks for your remark. I was not initializing at all VSYSMIN at start but now I tried to set it to 4352mV and also to 12544mV (batteries are at 6.3 V, 5 NIMH cells). The charger did not start, I join the register dumps for 4352mV. It is the same sequence for 12544 mV. I could see that when a RESET_REG is done, the VSYSMIN is set to 0V. After initialization I read once all registers, then I display every register changes. 0x21 changes as soon as CHRG_OK 0x21[7] is set to 1 or reset to 0. No status error appear so 0x20 remain to latest display value, 0. ResetWhileChargingMinSys4352.txt" + }, { + "contentId" : "3310681", + "userName" : "Alain Roger", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 8, 2020 5:56 PM", + "userId" : "6152039", + "content" : "Hello, I write back because I do not understand why the charger is not working. I do not know why the ADC measurement does not start after I set register 3B : 0b11100000, and 3A : 11111111. I know that could happen if I was in low power mode (REG0x01[7] = 1), but my register 0x01 is 0b00000010. Do anyone would have a reason why the measurement ADC is not launched ? Thank you," + }, { + "contentId" : "3316168", + "userName" : "Tiger Zhou", + "rankPoints" : "610", + "rankName" : "Prodigy", + "date" : "Apr 15, 2020 4:00 AM", + "userId" : "1451791", + "content" : "Hi, Alain, This is weird, especially it worked previously. I checked your register settings, didn't see any unusual. Could you check if Vin, REGN, ILIM-HIZ and CELL-BATPRESZ voltage in the range?" + }, { + "contentId" : "3328060", + "userName" : "Alain Roger", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 26, 2020 10:29 AM", + "userId" : "6152039", + "content" : "Hello, I could perform measurements on REGN and CELL-BATPRESZ, with 4 NiMH batteries plugged via Batfet. Then I set Vin to 4.98V, so I get pin CHRG_OK turning on. At that moment, no measurement are launched while I have registers 3A : 11111111 & 3B : 11100000. In those conditions, I measure REGN pin voltage and I get less than 50mV, far from the 6V LDO announced in the datasheet. Then I measure CELL-BATPRESZ and I get nearly 0V, very lower with regards to the Vdda voltage that should be a few volts. This Vdda is also near 0V. The register 0x32[7] is set to 1 in order to disable ILIM_HIZ pin, so I use to set it to GND. Even when I set it higher than 4.0V, the adc converters do not start and I still have same voltage values for REGN, CELL-BATPRESZ and Vdda. I suppose the LDO is blown out, what do you think ? Vincent,20200426_RegisterHistory.txt" + }, { + "contentId" : "3329519", + "userName" : "Tiger Zhou", + "rankPoints" : "610", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 9:15 PM", + "userId" : "1451791", + "content" : "Hi, Alain, That is what I worried. REGN is the most important voltage for the function of BQ25703A. It provides the gate drive current as well as the power for VDDA rail. It looks to me the part was damaged during the troubleshooting. Please replace the IC or work on a new prototype." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25703A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/891226.json b/data/json/DLP/891226.json new file mode 100644 index 0000000000000000000000000000000000000000..34f1374f7d90061ddd7956f12e8751cc08e13e3d --- /dev/null +++ b/data/json/DLP/891226.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "891226", + "reporterName" : "James Zhan", + "rankPoints" : "1755", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ24773: BATPRES PIN connection", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 28", + "queryText" : "Part Number: BQ24773 Hi team, According to the datasheet, the PIN 15 of BQ24773 \"BATPRES\" is input signal PIN, but in the EVM I've found it seems to be output PIN. If customer want to connect this pin to the MCU to indicate whether if the battery is present, how should they do? Thanks.", + "partNumber" : " BQ24773", + "allResponseList" : [ { + "contentId" : "3295447", + "userName" : "Steve Preissig", + "rankPoints" : "4610", + "rankName" : "Expert", + "date" : "Mar 24, 2020 1:53 PM", + "userId" : "8914", + "content" : "Hello James, The /BATPRES signal on BQ2477x is always an input signal. The reason that it behaves like an output signal on the EVM is because there is an external comparator (U2) that generates a /BATPRES signal from the battery voltage. If the battery pack your customer is using does not have a signal that can be connected to the MCU for this purpose, then an external comparator such as used on the EVM can be used. Note that the BQ2477x also has an independent comparator that can be used to detect battery presence as well. You can refer to the BQ24780s EVM for an example of how the independent comparator can be used instead of an external comparator, saving cost and board space. (BQ24780s EVM has an external comparator as well, but there are jumper options to select between using the external comparator or independent comparator for /BATPRES) Regards, Steve" + }, { + "contentId" : "3323912", + "userName" : "James Zhan", + "rankPoints" : "1755", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 7:27 AM", + "userId" : "5039519", + "content" : "Hi Steve, Thanks for the comments. I have more questions as below: 1. Is PIN 15 BATPRES the only way to detect if battery present in BQ24773? could we just read one of the register and get this information? 2. Could we left BATPRES PIN open, not connecting to anything? Would this has any risk? Please let me know if you have any ideas, thanks!" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24773" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/891261.json b/data/json/DLP/891261.json new file mode 100644 index 0000000000000000000000000000000000000000..0d779fc6455e4700f127850d5e50a63d8a7ecc24 --- /dev/null +++ b/data/json/DLP/891261.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "891261", + "reporterName" : "Michiaki Tanii", + "rankPoints" : "1600", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TL494: Frequency configuration", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 27", + "queryText" : "Part Number: TL494 Hi Referring 9.3.2 Oscillator, the equation is f = 1/(RT x CT) but TYP frequency is 10kHz at CT = 0.01uF, RT = 12k ohm in the 7.6 Electrical Characteristics, Oscillator Section. Could you kindly advise how customer should consider the frequency configuration ? Thank you and best regards, Michiaki", + "partNumber" : " TL494", + "allResponseList" : [ { + "contentId" : "3296841", + "userName" : "John Griffin1", + "rankPoints" : "32175", + "rankName" : "Mastermind", + "date" : "Mar 25, 2020 3:45 PM", + "userId" : "1693693", + "content" : "Hello Michiaki, This is some anomaly in the datasheet that goes all through revisions from Rev A to the present Rev H. Please use the curves in Figure 1 or the equation 3 in the datasheet to calculate the oscillator frequency. Thank you for pointing out this anomaly and I will try to find out why the test circuit uses a 12k resistor for Rt instead of a 10k. Regards John" + }, { + "contentId" : "3320709", + "userName" : "Michiaki Tanii", + "rankPoints" : "1600", + "rankName" : "Intellectual", + "date" : "Apr 20, 2020 4:12 AM", + "userId" : "6119109", + "content" : "Hi John, > I will try to find out why the test circuit uses a 12k resistor for Rt instead of a 10k. Regarding on the above, could you kindly update latest situation ? Thank you and best regards, Michiaki" + }, { + "contentId" : "3322914", + "userName" : "John Griffin1", + "rankPoints" : "32175", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 2:12 PM", + "userId" : "1693693", + "content" : "Hello Michiaki, I will let you know when I have an update Regards John" + } ], + "tags" : [ "/support/power-management/f/196/tags/TL494" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/891457.json b/data/json/DLP/891457.json new file mode 100644 index 0000000000000000000000000000000000000000..9f063fff0475ab57f175938243ed641b4d6ab316 --- /dev/null +++ b/data/json/DLP/891457.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "891457", + "reporterName" : "Igor Leal", + "rankPoints" : "100", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS62745: TPS62745", + "rankName" : "Prodigy", + "replies" : " 19", + "views" : " 85", + "queryText" : "Part Number: TPS62745 Hello, We are facing similar situation. Vsel was connected to Vin (design error), powered by batteries higher than 6V and some devices are damaged. Would be possible to share the squematic internally and go deeper on the severity of this problem? Thanks in advance. BRs,", + "partNumber" : " TPS62745", + "allResponseList" : [ { + "contentId" : "3296082", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Mar 25, 2020 12:11 AM", + "userId" : "24596", + "content" : "Igor, It is probably difficult at this time. We can only recommend that teh abs max rating be observed. I will contact our design team about internal details. For sure it will require an NDA to share any details." + }, { + "contentId" : "3297026", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Mar 25, 2020 5:39 PM", + "userId" : "24596", + "content" : "Igor, These pins connect two to pieces of internal circuitry: 5V ESD clamp, and inputs of 5V CMOS logic gates running on an internal rail. The obvious mechanisms of damage that I can foresee from over-voltage on these pins include: · Damage to pin metallization or ESD clamp due to triggering of ESD cell. This could cause functional issues with the VSEL signaling, as well as other possible issues if reflowed metal shorts to nearby circuitry. This type of failure would be immediate when the overstress occurs. In my estimation the risk of this kind of failure is low if the pin voltage stays below 7V, since the nominal trigger point for the ESD clamp is above 11V. · Damage to the gate oxide of the ESD cell or the CMOS logic gates. This could cause functional issues with the VSEL signaling, as well as other possible issues if the high current flowing through the failed oxide loaded down the internal rail or caused reflowed metal shorts to nearby circuitry. This type of failure has increasing probability of occurring as the time of exposure to over-stress increases. The risk for this failure is also low if the pin voltage stays below 7V. Our model for this kind of failure mechanism predicts less than 1 failed unit per billion after 100k operating hours at the worst case temp of 150C as long as the voltage never exceeds 7V (including transients, ringing, etc). Of course, this assessment should not be taken as any kind of guarantee of results for the customer. I have considered the most apparent mechanisms of failure under this application’s conditions, but this kind of analysis isn’t foolproof. It’s possible that there could be another mechanism or issue that I have not caught, which is why we qualify and specify the components and circuits within a given range. That more rigorous process yielded the abs max specs that are being violated." + }, { + "contentId" : "3297782", + "userName" : "Igor Leal", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Mar 26, 2020 10:11 AM", + "userId" : "4146277", + "content" : "Thanks for your complete and so deep reply John. It seems that our board don´t have to face many problems working below 7V (maximum 1 per billion). After your answer, we have tested today 200 boards, just connecting 6,3 V Lithium battery, and 28 units are damaged, so current consumption increases 10-100 times. After changing TPS62745 regulator it works fine returning to the normal current consumption. So, do you think there is another possible problem, maybe on our schematic? Or could be possible to be a batch problem on these regulator, I don´t think so, but do you have any information about it? Thanks in advance." + }, { + "contentId" : "3302378", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Mar 31, 2020 5:09 PM", + "userId" : "24596", + "content" : "Igor, There are no lot quality issues that I am aware of." + }, { + "contentId" : "3303352", + "userName" : "Igor Leal", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Apr 1, 2020 11:35 AM", + "userId" : "4146277", + "content" : "Hello John, Thanks for your answer. So, if we are working under any probed specifications, there is no explanation for having to replace your regulators on some of our devices in order to work properly. If you are able we can share our schematic with you, maybe there is something wrong that we cannot detect. BRs," + }, { + "contentId" : "3303424", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Apr 1, 2020 12:48 PM", + "userId" : "24596", + "content" : "Igor, if you post your schematic, I will review it." + }, { + "contentId" : "3303792", + "userName" : "Igor Leal", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Apr 1, 2020 4:31 PM", + "userId" : "4146277", + "content" : "Hello John, Attached you can find schematic referred to TPS62745. Where D1, D2 and T4 are not mounted. So J2-battery power go directly to R2 0 ohm. 6V lithium battery is connected to J2 in normal activity (initially 6,5 V). In parallel 3V3 are applied to Vout from TC1 connector when device is programming. Sometimes could be 3,4 - 3,5 V. Can you see any issue on that schematic? Thanks in advance. BRs," + }, { + "contentId" : "3303826", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Apr 1, 2020 4:51 PM", + "userId" : "24596", + "content" : "Igor, If you apply an external 3.3 V to the output of the TPS62745, and the battery is not connected the high side body diode can conduct and you may possibly have enough voltage at the input to allow the device to start switching. Can you check it in that condition?" + }, { + "contentId" : "3315097", + "userName" : "Igor Leal", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Apr 14, 2020 10:40 AM", + "userId" : "4146277", + "content" : "Hello John, I have checked what you said and there are 0,25 V on the high side body diode along the range of 2-4V applied externally on Vout / SW pins. So, in normal situation, when we apply external 3,3 V at the V output we have 3,05 V at Vin pin. If we apply external 3,4 --> 3,15 V at Vin If we apply external 3,5 --> 3,25 V at Vin So, it could be a problem to damage the chip? Thanks BRs, Igor" + }, { + "contentId" : "3315245", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Apr 14, 2020 1:13 PM", + "userId" : "24596", + "content" : "Igor, Do you see any switching activity on the SW pin? Is EN tied low?" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS62745" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/891745.json b/data/json/DLP/891745.json new file mode 100644 index 0000000000000000000000000000000000000000..76757d0337cbf2eb1282f5ec61b62c6fbb346917 --- /dev/null +++ b/data/json/DLP/891745.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "891745", + "reporterName" : "Brett Colteaux", + "rankPoints" : "1795", + "resolutionStatus" : "Resolved", + "ticketName" : "[FAQ] Do you have any guidance as to how I should choose my PoE PD IC?", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 152", + "queryText" : "Do you have any guidance as to how I should choose my PoE PD IC?", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3296902", + "userName" : "Brett Colteaux", + "rankPoints" : "1795", + "rankName" : "Intellectual", + "date" : "Mar 25, 2020 4:20 PM", + "userId" : "4406190", + "content" : "Great question! Please see the below flowchart that provides general guidance as to how to choose one of TI's PoE PD ICs: Best Regards, Brett Colteaux PoE Product Marketing Engineer" + } ], + "tags" : [ "/support/power-management/f/196/tags/PoE" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/892345.json b/data/json/DLP/892345.json new file mode 100644 index 0000000000000000000000000000000000000000..aea22a9449b390f7672c2fe115d8833509ec5e6c --- /dev/null +++ b/data/json/DLP/892345.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "892345", + "reporterName" : "Daniel Matterson", + "rankPoints" : "30", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM5066IEVM-626: UVLO Gate Masking Behaviour", + "rankName" : "Prodigy", + "replies" : " 10", + "views" : " 66", + "queryText" : "Part Number: LM5066IEVM-626 Hi, We seem to be experiencing some unexpected behaviour with the above part: We have tied UVLO/EN to GND to ensure the mosfet defaults off when the device is powered up. In order to turn on the mosfet, we are gate masking the UVLO which works as expected. However, we are now seeing that the OC/OP protection is not latching off. We do not believe the culprit is !RETRY since we have it tied to VCC and the device is configured to use pin cfg for RETRY. Mosfet switches off when there is a short or OC, but immediately turns back on when short or load is removed. Can anyone explain this behaviour? Is the masking of UVLO and connecting it to GND causing faults to be unintentionally reset and the mosfet switched back on? Daniel", + "partNumber" : " LM5066IEVM-626", + "allResponseList" : [ { + "contentId" : "3299116", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Mar 27, 2020 12:35 PM", + "userId" : "4743883", + "content" : "Hi Daniel, Thanks for reaching out! I will go through the above one and get back early next week. Hope this is fine for you. Best Regards, Rakesh" + }, { + "contentId" : "3300051", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Mar 29, 2020 11:03 AM", + "userId" : "4743883", + "content" : "Hi Daniel, Masking the GATE for any fault event will reset the GATE. It should be avoided in normal operation. Caution: Enabling gate masking may result in pass FET damage during fault conditions. Gate masking should only be used during system debugging. Let us know if there are any followup questions. Best Regards, Rakesh" + }, { + "contentId" : "3308659", + "userName" : "Daniel Matterson", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 7, 2020 8:56 AM", + "userId" : "6127359", + "content" : "Hi Rakesh, Just to confirm what you mean: By masking the GATE for any fault event - will this reset the gate repeatedly or only once when masked? The reason I ask is because we are experiencing some undocumented behaviour. By keeping UVLO tied low and gate masking the fault, the LM5066I repeatedly retries to turn on the mosfet after 1 timer timeout (20ms period on the EVAL board). This leads to what I said earlier - any fault condition is not latched (i.e. OC or OP). A completely different set of behaviour is experienced when using the OLVO fault to ensure the mosfet is off at power up, by connecting OVLO to Vcc. In this case, when the OVLO fault is masked, OC and OP faults thereafter are in fact latched and the mosfet is not repeatedly turned on. I have attached scope traces showing the gate and timer pin behaviour for both cases during a short circuit. Can you explain to me why there is a difference in behaviour between masking UVLO and OVLO, and why when masking the UVLO fault, it repeatedly resets all faults and prevents latching? Kind Regards Daniel UVLO Gate Masked (and tied low), Retries set to 0: UVLO Gate Masked (and tied low), Retries set to Infinite: OVLO Gate Masked (and tied high), Retries set to 0:" + }, { + "contentId" : "3309824", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 8, 2020 3:18 AM", + "userId" : "4743883", + "content" : "Hi Daniel, This is not the common use case in general. Can you help us understand the purpose of GATE masking in your system. This would help our designers to analyze the issue as we don't have much validation details for this rare use case. Best Regards, Rakesh" + }, { + "contentId" : "3310178", + "userName" : "Daniel Matterson", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 8, 2020 10:53 AM", + "userId" : "6127359", + "content" : "Hi Rakesh, We are trying to ensure that the mosfet is off at power up. To do so we tie UVLO low, then when configuring the LM5066I, the UVLO fault can be gate masked and the rest of the hotswap functionality is as expected. But by doing it this way we lose the latching functionality of the OC and OP faults. An alternative method is to tie OVLO high and gate mask it. This does not prevent the OC and OP fault from latching and the hotswap controller functions as expected. Is this the best way to achieve our requirement of ensuring the mosfet is off at power up? Can you recommend another method? Kind Regards Daniel" + }, { + "contentId" : "3310477", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 8, 2020 3:21 PM", + "userId" : "4743883", + "content" : "Hi Daniel, One way is to pull the UVLO/EN pin LOW as shown in Figure-16 in the datasheet The other method is to issue OPERATION command 00h immediately after powerup (before the insertion time expires, refer Figure 13) to keep the system in disable state. These two are widely used and proven methods. Best Regards, Rakesh" + }, { + "contentId" : "3313416", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 13, 2020 7:46 AM", + "userId" : "4743883", + "content" : "Hi Daniel, Do you have any followup questions.? Best Regards, Rakesh" + }, { + "contentId" : "3315105", + "userName" : "A John", + "rankPoints" : "10", + "rankName" : "Prodigy", + "date" : "Apr 14, 2020 10:51 AM", + "userId" : "6324258", + "content" : "Hi Rakesh, Background: I can provide a bit more background. We are using the LM5066 to provide soft-start, short circuit protection, & diagnostic functionality on several power outputs (16 outputs). As Daniel mentioned we want these outputs to be off on startup. Hence artificially causing a lockout with UVLO/EN then masking the error once we have software control. An additional complication is these LM5066 are on different electrically isolated sections. I2C control is very convenient as it only requires 2 signals to cross isolation. Finally we are using the dV/dT startup configuration to allow large capacitance to be turned ON but with a fast fault timer in case of problems (Fault = 0.5ms) Problem: The fault mask register provides the ability to mask individual errors. Table 33 list all the errors which can be individually masked. It has undocumented effect on the UVLO/EN pin, this pin affects ALL faults including the overcurrent AND circuit breaker faults. Internally it appears to clear the fault in a way that makes the system detect an EN toggle (which clears all faults). e.g the mask affects both UVLO and EN part of the UVLO/EN signal internally. OVLO fault masking appears to work more as intended and only affects itself. Keeping MOSFET OFF at TurnON Optionscompany Suggestion: One way is to pull the UVLO/EN pin LOW as shown in Figure-16 in the datasheet Our Comment: We are doing that by keeping UVLO tied low. Unfortunately we cannot release it as per figure 16 since that would require an additional signal to cross electrical isolation, for each LM5066. (we are using 16).company Suggestion:The other method is to issue OPERATION command 00h immediately after powerup. Our Comment: Good idea, we did not consider this. Timing constraints will very tight as our 10nF timer capacitor would give us about 7.8ms startup time. Realistically i dont think we can guarantee having communicated to all LM5066 with-in that time 7ms. Follow Up Question: 1. Would you be in a position to confirm the exact behaviour of the UVLO/EN mask and how it affects all other faults? 2. With UVLO masked it appears to clear ALL faults either every ~100ms or ~20ms depending on the retry setting(retry, or not) but we have been unable to relate either time to the timer capacitor setting. Is it a hard-coded internal retry period? 3. Able to confirm this issue is confined to the UVLO/EN fault and that OVLO will work as documented?" + }, { + "contentId" : "3316856", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 15, 2020 3:18 PM", + "userId" : "4743883", + "content" : "Hi Daniel, John, I understood the challenges in using the UVLO/EN pin for control or the OPERATION command 00h in your system. I need to verify the behavior and discuss with our design team to find the root-cause. Please allow some time. Best Regards, Rakesh" + }, { + "contentId" : "3325222", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 4:57 AM", + "userId" : "4743883", + "content" : "Hi Daniel, John, I am yet to visit lab for bench verification. How critical is it at your end ? Have you explored any alternate ways to realize this function at your system level ? I just want to inform you that I can make some progress in the next week. Best Regards, Rakesh" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM5066IEVM_2D00_626" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/892352.json b/data/json/DLP/892352.json new file mode 100644 index 0000000000000000000000000000000000000000..10175f52df0dec0b09c6ae96c7a04acb49a63700 --- /dev/null +++ b/data/json/DLP/892352.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "892352", + "reporterName" : "Betty Guo", + "rankPoints" : "3070", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS23755: start current of TPS23755", + "rankName" : "Expert", + "replies" : " 4", + "views" : " 31", + "queryText" : "Part Number: TPS23755 Hi team, we want to check how much the startup current? I find that TPS23755 use advance startup, and integrate the current source.", + "partNumber" : " TPS23755", + "allResponseList" : [ { + "contentId" : "3299730", + "userName" : "Michael Pahl", + "rankPoints" : "4915", + "rankName" : "Expert", + "date" : "Mar 27, 2020 10:27 PM", + "userId" : "6102321", + "content" : "Hello Betty, The EVM has a startup waveform that shows the input current on page 6: That will include the current used in advanced startup. If this post answers your question, please indicate so by marking this thread as resolved. Thank you. Regards, Michael P. Applications Engineer customer organization" + }, { + "contentId" : "3300156", + "userName" : "Betty Guo", + "rankPoints" : "3070", + "rankName" : "Expert", + "date" : "Mar 30, 2020 1:35 AM", + "userId" : "5039529", + "content" : "hi Michael, I sitll not clear about the startup current. In the page 6, the Iin is the startup current,right? And, why it have a step and then spike? The startup current is less than 50mA?" + }, { + "contentId" : "3301057", + "userName" : "Michael Pahl", + "rankPoints" : "4915", + "rankName" : "Expert", + "date" : "Mar 30, 2020 5:21 PM", + "userId" : "6102321", + "content" : "Betty, The current shown in page 6 is the input current for the board. This will include the current in the startup circuit. Or, are you needing the specific current associated with the internal current source? If so, why is that number needed versus the overall input current required? The large current spike is inrush, which is limited by the IC. If this post answers your question, please indicate so by marking this thread as resolved. Thank you. Regards, Michael P. Applications Engineer customer organization" + }, { + "contentId" : "3324520", + "userName" : "Michael Pahl", + "rankPoints" : "4915", + "rankName" : "Expert", + "date" : "Apr 22, 2020 3:30 PM", + "userId" : "6102321", + "content" : "Hello, This thread has been inactive for many weeks now. I am going to close it, but feel free to reopen it or start a new thread. Thank you. Regards, Michael Pahl" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS23755" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/892440.json b/data/json/DLP/892440.json new file mode 100644 index 0000000000000000000000000000000000000000..612c28d7c13cb36f76796a746daca7c1994f6c64 --- /dev/null +++ b/data/json/DLP/892440.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "892440", + "reporterName" : "Maulin Lodhia", + "rankPoints" : "380", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ35100: Flash stream file parsing fails on a comapare, resulting in bricked bq35100 chip", + "rankName" : "Intellectual", + "replies" : " 6", + "views" : " 55", + "queryText" : "Part Number: BQ35100 Hello, We have implemented flash stream parser based on the code described in slua801. we tested the parser and it parses the flash stream file as per specifications (flash stream specification file attached1856.Flash Stream File Format.pdf). During our tests with the bq35100 device we found that firmware revision that was read and compared against a known value was failing. When using bqstudio reading of ID and version was working correctly. In order to do the same with flash streamer file to read id and fimware version, we had to add 100ms delay after i2cwrite command (see below routine). char *BQ35100_execute_fs(char *pFS)\n{\n\tint nLength = strlen(pFS);\n\tint nDataLength;\n\tchar pBuf[16];\n\tchar pData[32];\n\tint n, m;\n\tchar *pEnd = NULL;\n\tchar *pErr;\n\tbool bWriteCmd = false;\n\tbool bReadCmd = false;\n\tbool bCompareCmd = false;\n\tunsigned char nRegister;\n\n\tm = 0;\n\tfor (n = 0; n < nLength; n++)\n\t\tif (pFS[n] != ' ') pFS[m++] = pFS[n];\n\tpEnd = pFS + m;\n\tpEnd[0] = 0;\n\n\tdo\n\t{\n\t\tswitch (*pFS)\n\t\t{\n\t\t\tcase ';':\n\t\t\t\tbreak;\n\t\t\tcase 'W':\n\t\t\tcase 'C':\n\t\t\tcase 'R':\n\t\t\t\tbWriteCmd = *pFS == 'W';\n\t\t\t\tbReadCmd = *pFS == 'R';\n\t\t\t\tbCompareCmd = *pFS == 'C';\n\t\t\t\tpFS++;\n\t\t\t\tif ((*pFS) != ':') goto exit_parse;\n\t\t\t\tpFS++;\n\t\t\t\tn = 0;\n\t\t\t\twhile ((pEnd - pFS > 2) && (n < sizeof(pData) + 2) &&(*pFS != '\\n'))\n\t\t\t\t{\n\t\t\t\t\tpBuf[0] = *(pFS++);\n\t\t\t\t\tpBuf[1] = *(pFS++);\n\t\t\t\t\tpBuf[2] = 0;\n\t\t\t\t\tm = strtoul(pBuf, &pErr, 16);\n\t\t\t\t\tif (*pErr) return (pFS - 2);\n\t\t\t\t\tif (n == 0) deviceAddress = m;\n\t\t\t\t\tif (n == 1) nRegister = m;\n\t\t\t\t\tif (n > 1) pData[n - 2] = m;\n\t\t\t\t\tn++;\n\t\t\t\t}\n\t\t\t\tif (n < 3) goto exit_parse;\n\t\t\t\tnDataLength = n - 2;\n\t\t\t\tif (bWriteCmd)\n\t\t\t\t{\n\t\t\t\t\tBQ35100_dump_data(\"Write\", nRegister, pData, nDataLength);\n\t\t\t\t\ti2cWriteBytes(nRegister, (uint8_t *)pData, nDataLength);\n\t\t\t\t\t/* Adding a delay giving bq35100 device sometime to put register value on I2C bus before we read it. */\n\t\t\t\t\tDelayMs(100);\n\t\t\t\t}\n\n\t\t\t\tif (bCompareCmd || bReadCmd)\n\t\t\t\t{\n\t\t\t\t\tchar pDataFromGauge[nDataLength];\n\t\t\t\t\ti2cReadBytes(nRegister, (uint8_t *)pDataFromGauge, nDataLength);\n\t\t\t\t\tif (bCompareCmd)\n\t\t\t\t\t{\n\t\t\t\t\t\tBQ35100_dump_data(\"Read\", nRegister, pDataFromGauge, nDataLength);\n\t\t\t\t\t\tBQ35100_dump_data(\"Compare\", nRegister, pData, nDataLength);\n\t\t\t\t\t\tif (memcmp(pData, pDataFromGauge, nDataLength))\n\t\t\t\t\t\t{\n\t\t\t\t\t\t\tDEBUG_PRINTF(\"%s: Memory comparison action failed, exiting...\\r\\n\", __func__);\n\t\t\t\t\t\t\tgoto exit_parse;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\telse\n\t\t\t\t\t\tBQ35100_dump_data(\"Read\", nRegister, pDataFromGauge, nDataLength);\n\t\t\t\t}\n\t\t\t\tbreak;\n\t\t\tcase 'X':\n\t\t\t\tpFS++;\n\t\t\t\tif ((*pFS) != ':') goto exit_parse;\n\t\t\t\tpFS++;\n\t\t\t\tn = 0;\n\t\t\t\twhile ((pFS != pEnd) && (*pFS != '\\n') &&(n /lit/an/spra953c/spra953c.pdf As specified in the datasheet, –40°C to 125°C is the Junction temperature range. If this post answers your question, please indicate so by marking this thread as resolved. Thank you. Regards, Michael P. Applications Engineer customer organization" + }, { + "contentId" : "3308503", + "userName" : "Hector Chen", + "rankPoints" : "190", + "rankName" : "Prodigy", + "date" : "Apr 7, 2020 5:45 AM", + "userId" : "5910362", + "content" : "Michael, I understand how to calculate Tj using thermal resistance. Is it diffcult to know TPS23758 power consumption becasue of internal MOS ? Thanks Hector" + }, { + "contentId" : "3309031", + "userName" : "Michael Pahl", + "rankPoints" : "4915", + "rankName" : "Expert", + "date" : "Apr 7, 2020 2:28 PM", + "userId" : "6102321", + "content" : "Hello Hector, The power consumption of the IC is discussed in this other post. Since they already discuss it, I just attach the link: /support/power-management/f/196/t/820034?TPS23755-TPS23755-IC-Power-Dissipation-Calculation The calculation includes an assumption about the power loss through the internal FET gate because the direct gate capacitance cannot be measured. However, we can estimate the power loss through there because all the power for the gate is coming from VCC so that is how we calculate it. If this post answers your question, please indicate so by marking this thread as resolved. Thank you. Regards, Michael P. Applications Engineer customer organization" + }, { + "contentId" : "3311324", + "userName" : "Hector Chen", + "rankPoints" : "190", + "rankName" : "Prodigy", + "date" : "Apr 9, 2020 10:14 AM", + "userId" : "5910362", + "content" : "Hi Michael, The calculation shown in /support/power-management/f/196/t/820034?TPS23755-TPS23755-IC-Power-Dissipation-Calculation The power dissipated by the IC will be the power at the pass FET (IRTN*IRTN*RDSon) and the power to drive the gate of the switching FET (VCC*ICC) and conduction loss of the switching FET (RDSonFET*Irms*Irms). Can we ignore switching loss of the switching FET ?" + }, { + "contentId" : "3315981", + "userName" : "Michael Pahl", + "rankPoints" : "4915", + "rankName" : "Expert", + "date" : "Apr 14, 2020 11:14 PM", + "userId" : "6102321", + "content" : "Hello Hector, Yes that is correct. If this post answers your question, please indicate so by marking this thread as resolved. Thank you. Regards, Michael P. Applications Engineer customer organization" + }, { + "contentId" : "3322528", + "userName" : "Hector Chen", + "rankPoints" : "190", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 9:00 AM", + "userId" : "5910362", + "content" : "Hi Michael, Here is current measurment of the switching MOS in TPS23758. Calculated conduction loss of the MOS is 0.08W. Total power loss of TPS23758 would be too low to match case temperture measurment on TPS23758 itself. Why can we ignore switching loss of the switching MOS ? Thanks." + }, { + "contentId" : "3323039", + "userName" : "Michael Pahl", + "rankPoints" : "4915", + "rankName" : "Expert", + "date" : "Apr 21, 2020 3:23 PM", + "userId" : "6102321", + "content" : "Hello Hector, The switching loss is estimated by the power to drive the gate of the switching FET (VCC*ICC). The traditional way to calculate the switching loss is not possible with the FET internal to the part. If this post answers your question, please indicate so by marking this thread as resolved. Thank you. Regards, Michael P. Applications Engineer customer organization" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS23758" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/893179.json b/data/json/DLP/893179.json new file mode 100644 index 0000000000000000000000000000000000000000..3400daafd5a9932190d143f059a667098ec560b1 --- /dev/null +++ b/data/json/DLP/893179.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "893179", + "reporterName" : "Dinesh Gread1", + "rankPoints" : "140", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM5146-Q1: How to add over current protection for a particular current", + "rankName" : "Prodigy", + "replies" : " 22", + "views" : " 77", + "queryText" : "Part Number: LM5146-Q1 Hi TI, i am using a Buck converter using LM546-Q1 .I have design for 8 amp out, for 13.5V Input 30-60V input . i am using RDSon for current limit sense . But in the datasheet it is not clear how ILIM pin save the circut for overcurrent protection please explain. . The issue i am facing with surge current.it is working fine while i am incresing the current from 0-1-2-3---8 up to 8 amp but while i am suddenly add load the circut went to hiccup mode as like short circuit. Please let me know how to resolve the issue, Is the anyway i can limit the current for 10 amp max? if i will use ILIM pin for 10amp limit the current, curcuit not able to take surge current. Please provide some suggestion .", + "partNumber" : " LM5146-Q1", + "allResponseList" : [ { + "contentId" : "3302226", + "userName" : "Arief Hernadi", + "rankPoints" : "17155", + "rankName" : "Genius", + "date" : "Mar 31, 2020 3:25 PM", + "userId" : "1949787", + "content" : "Hi Dinesh, Unfortunately, I was not able to see the component values for the schematic that you have. You can check the component selection values with the calculator located at the bottom of this page /product/LM5146-Q1/toolssoftware Also the layout will play an important role in order to sense the current limit correctly. You can follow the layout guidelines here /lit/ds/symlink/lm5146-q1.pdf#page=48 Thanks -Arief" + }, { + "contentId" : "3302278", + "userName" : "Dinesh Gread1", + "rankPoints" : "140", + "rankName" : "Prodigy", + "date" : "Mar 31, 2020 3:53 PM", + "userId" : "4413136", + "content" : "Hi Arif, Please explain How ILIM pin works? also please let me know how to switch off the converter if someone tries to take more current ? for example i have design the converter for 8 amp if somone tries to take 10 amp i wants to switch off at that moment so please let me know your suggestion. do i need to add another opamp or use another technique. Thanks Dinesh" + }, { + "contentId" : "3304653", + "userName" : "Dinesh Gread1", + "rankPoints" : "140", + "rankName" : "Prodigy", + "date" : "Apr 2, 2020 9:21 AM", + "userId" : "4413136", + "content" : "Hello Arif, i am waiting for reply please explain . Best Regards, Dinesh Gread" + }, { + "contentId" : "3305535", + "userName" : "Arief Hernadi", + "rankPoints" : "17155", + "rankName" : "Genius", + "date" : "Apr 2, 2020 11:32 PM", + "userId" : "1949787", + "content" : "Hi, I think the explanation of the current limit is located here /lit/ds/symlink/lm5146-q1.pdf#page=23 I dont think the device will shutdown if the current limit is achieved. If you want the part to shutdown then you have to use maybe an external current sense amplifier and set it such that it will disable the part when the desired current is reached. Thanks -Arief" + }, { + "contentId" : "3305718", + "userName" : "Timothy Hegarty", + "rankPoints" : "13220", + "rankName" : "Genius", + "date" : "Apr 3, 2020 4:53 AM", + "userId" : "1877696", + "content" : "Hi Dinesh, The LM5146-Q1 will enter hiccup mode if the current limit condition persists. Once the current limit is removed, normal operation resumes. Regards, Tim" + }, { + "contentId" : "3305746", + "userName" : "Dinesh Gread1", + "rankPoints" : "140", + "rankName" : "Prodigy", + "date" : "Apr 3, 2020 5:43 AM", + "userId" : "4413136", + "content" : "Hi Arif, will you please suggest any circuit which i can use for current limit. Best Regards, DInesh Gread" + }, { + "contentId" : "3310977", + "userName" : "Arief Hernadi", + "rankPoints" : "17155", + "rankName" : "Genius", + "date" : "Apr 9, 2020 1:02 AM", + "userId" : "1949787", + "content" : "Hi Dinesh, The inrush current is it due to charging to the output capacitor? If that is true then you can use a larger SS capacitor and slow down the rise time of the output such that the inrush current will not be too big and trigger the current limit Thanks -Arief" + }, { + "contentId" : "3311149", + "userName" : "Dinesh Gread1", + "rankPoints" : "140", + "rankName" : "Prodigy", + "date" : "Apr 9, 2020 5:36 AM", + "userId" : "4413136", + "content" : "Hi Arif, i have made this circuit for 8 amp out. i want this circuit to limit the current at 9-10amp more than that it shoud not provide. the short circuit condition is fine it enter in hiccup mode but i want that if i design this circuit for 8 amp it should not provide more that that . can you please suggest any circuit by use of that i can limit the current . Also please let me know how to reduse the no load current currently the circut works on 400Khz and take 40ma and it is just waste can you please let me know how to minimize it. i dont have control on EN pin i.e this circuit will not off any time but load can be off so that i wants to reduse the no load current also. please suggest" + }, { + "contentId" : "3314931", + "userName" : "Dinesh Gread1", + "rankPoints" : "140", + "rankName" : "Prodigy", + "date" : "Apr 14, 2020 7:56 AM", + "userId" : "4413136", + "content" : "Hicompany Team, i am waiting for your inputs . Best Regards, Dinesh Gread" + }, { + "contentId" : "3315484", + "userName" : "Timothy Hegarty", + "rankPoints" : "13220", + "rankName" : "Genius", + "date" : "Apr 14, 2020 3:43 PM", + "userId" : "1877696", + "content" : "HI Dinesh, You can use diode emulation mode (with SYNCIN tied low) to reduce the no-load input current. In terms of overcurrent protection (OCP). the setpoint is typically defined using the ILIM resistor at 130-150% of nominal full load current. This is because the inductor current overshoots during load transients and may inadvertently trip OCP. Please fill out the LM5146-Q1 quickstart file and send to us for review. Also, the schematic values above are unreadable, so please forward a higher res version if possible PS: Your design seems similar to the LM5146-Q1 EVM with 12V/8A output. Regards, Tim" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM5146_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/893357.json b/data/json/DLP/893357.json new file mode 100644 index 0000000000000000000000000000000000000000..05974c5d5d18c64ffa5c481a93d16e63199412e5 --- /dev/null +++ b/data/json/DLP/893357.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "893357", + "reporterName" : "James Foster1", + "rankPoints" : "140", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ34Z100-G1: Stops taking OCV measurements after a time", + "rankName" : "Prodigy", + "replies" : " 13", + "views" : " 64", + "queryText" : "Part Number: BQ34Z100-G1 Hi, We have succesfully gone through a learning cycle and Update Status is 0x6. A few cycles after the learning cycle was complete, OCV readings stopped being taken and QMAX & DOD values stopped updating, with their respective counters just increasing above 100hrs even though we cycled the cells multiple times. My assumptions is that OCV readings should occur every time the fuel gauge enters relax? Interestingly when we reset the fuel guage and then do a few cycles OCV readings do occur for the first few times. Then they stop again. Why would this be happening? Is it normal behaviour? Will the fuel gauge decide to take readings after 200hrs or somthing? Thanks James", + "partNumber" : " BQ34Z100-G1", + "allResponseList" : [ { + "contentId" : "3302892", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 1, 2020 2:28 AM", + "userId" : "3528441", + "content" : "Hello James, Can you show me the test using a bqStudio log file?" + }, { + "contentId" : "3302900", + "userName" : "James Foster1", + "rankPoints" : "140", + "rankName" : "Prodigy", + "date" : "Apr 1, 2020 2:42 AM", + "userId" : "5873605", + "content" : "Hi, It is very difficult as the fuel gauge is floating at high volts. I can give you all the register values if that helps? But I think it easiest first to answer my initial question, should the fuel gauge take OCV measurement and update DOD/QMax on every cycle? Or does it only do it every 10 cycles or something?. Thanks, James" + }, { + "contentId" : "3308068", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 6, 2020 7:35 PM", + "userId" : "3528441", + "content" : "Hello James, OCV measurements are taken when the stack voltage reaches a dv/dt condition of < 1 uV/s. It does not do it via cycle count." + }, { + "contentId" : "3311111", + "userName" : "James Foster1", + "rankPoints" : "140", + "rankName" : "Prodigy", + "date" : "Apr 9, 2020 4:30 AM", + "userId" : "5873605", + "content" : "Hi Kang, Ok, thanks. Any ideas why it would take a few OCV readings after a reset and then never take any more? Would it be helpful to do a charge to 100% then turn off the charger and begin the bqstudio log file? All it will show is no OCV measurement is ever taken. Or would you like the register values? We have a second unit programmed with the golden file from the 1st unit and it does the same thing. Thanks James" + }, { + "contentId" : "3312061", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 9, 2020 10:26 PM", + "userId" : "3528441", + "content" : "Hello James, It depends on how stable the voltage is and whether or not IT is enabled. Yes, I think you should log a bqStudio file for us. I would like to look at the voltage and a few other debug registers such as DOD0. bqStudio logs all these by default." + }, { + "contentId" : "3315990", + "userName" : "James Foster1", + "rankPoints" : "140", + "rankName" : "Prodigy", + "date" : "Apr 14, 2020 11:28 PM", + "userId" : "5873605", + "content" : "Hi Kang, I have attached the log file. I started it a few minutes after full charge was reached. It ran overnight and no DOD0 or Qmax updates were seen. Our system is 16 x 100Ah 3.2V LIFEPO4 cells in series I notice that the voltage fluctuates by one ADC sample which equals 16mV for our system (16 cells in series). This can't be the issue can it? Cheers James" + }, { + "contentId" : "3315991", + "userName" : "James Foster1", + "rankPoints" : "140", + "rankName" : "Prodigy", + "date" : "Apr 14, 2020 11:30 PM", + "userId" : "5873605", + "content" : "log after charge 4-14-20.zip" + }, { + "contentId" : "3318669", + "userName" : "James Foster1", + "rankPoints" : "140", + "rankName" : "Prodigy", + "date" : "Apr 16, 2020 10:45 PM", + "userId" : "5873605", + "content" : "Hi Kang, Do you need me to collect any more information? We are almost ready to release our product and this is holding us up. We would really appreciate some help Thanks James" + }, { + "contentId" : "3322063", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 20, 2020 11:07 PM", + "userId" : "3528441", + "content" : "Hello James, Thank you for the log files. Can you send me the bqz file you are using in bqStudio? The default directory is C:\\ti\\BatteryManagementStudio\\config\\ We may need to open up a parameter for you to modify. If it is the default bqz, just let me know." + }, { + "contentId" : "3322080", + "userName" : "James Foster1", + "rankPoints" : "140", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 11:37 PM", + "userId" : "5873605", + "content" : "2728.0100_0_16-bq34z100G1.zip" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ34Z100_2D00_G1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/893362.json b/data/json/DLP/893362.json new file mode 100644 index 0000000000000000000000000000000000000000..7ed44467a42d263e450c20519369ef3032071310 --- /dev/null +++ b/data/json/DLP/893362.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "893362", + "reporterName" : "Michiaki Tanii", + "rankPoints" : "1600", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPSM53602: Environmental information", + "rankName" : "Intellectual", + "replies" : " 4", + "views" : " 39", + "queryText" : "Part Number: TPSM53602 Hi team, Could you kindly advise we could provide the material related environmental information ? (e.g RoHS, REACH, PFOS&PFOA etc…) In the website of material content search, we couldn’t see the information RoHS and REACH as below. Thank you and best regards, Michiaki", + "partNumber" : " TPSM53602", + "allResponseList" : [ { + "contentId" : "3303822", + "userName" : "Jimmy Hua", + "rankPoints" : "17640", + "rankName" : "Genius", + "date" : "Apr 1, 2020 4:50 PM", + "userId" : "4798049", + "content" : "Hi Michiaki, I have received a few E2E post about this recently. I have brought this up to the product compliance team and they have been looking into my request. I expect this to be processed and resolved several weeks from now since there are paperwork and an internal process flow to go through to get this approved and reflected on the product folder view you see there. Regards, Jimmy" + }, { + "contentId" : "3320722", + "userName" : "Michiaki Tanii", + "rankPoints" : "1600", + "rankName" : "Intellectual", + "date" : "Apr 20, 2020 5:00 AM", + "userId" : "6119109", + "content" : "Hi Jimmy, Could you kindly share the latest situation of environmental information ? I would much appreciate when you will update the status on the website. Looking at the website but the status is not changed yet. Thank you and best regards, Michiaki" + }, { + "contentId" : "3321656", + "userName" : "Jimmy Hua", + "rankPoints" : "17640", + "rankName" : "Genius", + "date" : "Apr 20, 2020 4:58 PM", + "userId" : "4798049", + "content" : "Hi Michiaki, I am going to ping the assigned analyst for this request to see the status on it. Additionally, I will try to find any documentation that shows RoHS certification if that helps you in any way. Unfortunately with the current global situation we are in, it can take some time to get the request resolved. However, rest assured that I will continually push with a sense of urgency to resolve this request. Thank you for your patience. I will try to reply back by end of today if I get any additional information on the matter, Regards, Jimmy" + }, { + "contentId" : "3321916", + "userName" : "Jimmy Hua", + "rankPoints" : "17640", + "rankName" : "Genius", + "date" : "Apr 20, 2020 8:18 PM", + "userId" : "4798049", + "content" : "I was able to get information back from the product engineer. Attached is a material content report for the TPSM53602 power module. Let me know if you have any other questions about this device. I'll be closing this thread now. Regards, Jimmy (RoHS Material Content)_Disclosure_Report_TPSM53602RDAR_4_8_2020_10_31_21_PM (2).xlsx" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPSM53602" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/893399.json b/data/json/DLP/893399.json new file mode 100644 index 0000000000000000000000000000000000000000..cb8af7b66872c6b142231529554ebfd776d93d72 --- /dev/null +++ b/data/json/DLP/893399.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "893399", + "reporterName" : "Mamadou Diallo", + "rankPoints" : "7305", + "resolutionStatus" : "Resolved", + "ticketName" : "[FAQ] UCC27712-Q1: Why should I replace 3-phase bridge drivers with half-bridge drivers in automotive AC compressor modules?", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 313", + "queryText" : "Part Number: UCC27712-Q1 I am currently using 3-phase bridge drivers for the IGBTs of the inverter stage of a BLDC motor. Why should I consider a gate driver to replace the 3-phase bridge driver in my existing solution? What are some performance advantages of the half-bridge gate drivers over my current solution?", + "partNumber" : " UCC27712-Q1", + "allResponseList" : [ { + "contentId" : "3302994", + "userName" : "Mamadou Diallo", + "rankPoints" : "7305", + "rankName" : "Expert", + "date" : "Apr 1, 2020 5:30 AM", + "userId" : "4708570", + "content" : "Why should I replace 3-phase bridge drivers with half-bridge drivers in automotive AC compressor modules? High-voltage 3-phase BLDC motors are used to drive the AC compressor in high-voltage HEV/EV. HVAC compressors, which can require 10 kW of power, are second only to traction motors in terms of power consumption. Figure 1 shows a typical AC compressor module block diagram with IGBTs as the inverter stage to drive the 3-phase BLDC motor. An inverter stage consists of three pairs of high-side and low-side IGBTs configured in half-bridge topology. Figure 1: Block diagram of an automotive high voltage HVAC compressor module As shown in Figure 2, designers have the choice of using 3-phase bridge drivers IC’s to drive the IGBT’s of the inverter stage. However, because of their low drive strength of <500 mA, 3-phase bridge driver solutions typically require additional buffers to act as a current booster. This means additional components, which translates into additional cost, system PCB size increase and performance degradation (EMI risks and increased propagation delays) of the overall system as a result of parasitics from a non-ideal PCB layout. Figure 2: Driving the inverter stage with 3-phase gate drivers To help minimize switching losses from the IGBTs and reduce EMI for higher system efficiency, designers have the choice of using half-bridge gate drivers to drive each phase of the inverter stage instead. That is, the 3-phase bridge drivers depicted in Figure 2 are increasingly being replaced with half-bridge drivers such as UCC27712-Q1 as shown in Figure 3. Figure 3: Driving the inverter stage with three half-bridge gate drivers The following are the reasons for usingcompany half-bridge drivers to drive the IGBTs: From a gate driver standpoint, EMI is often associated with overshoot at the gate. The configuration shown in Figure 2 leads to complex PCB layout including long PCB traces from the 3-phase driver switch node pin to the IGBTs, which could cause more EMI challenges. UCC27712-Q1 based approach shown in Figure 3 allows removal of extra components, reduces the complexity of the PCB layout because the driver IC can be placed very close to the IGBTs while also confining the switch node to minimal area. All this leads to less challenges with EMI. Does not require external booster stage to amplify the gate drive current as the IC can achieve 1.8A/2.8-A source and sink current. Interlock and dead time functions protect half-bridges from shoot-through by preventing both outputs from being turned on simultaneously. Wide VDD range 22V offers sufficient margin to effectively drive the IGBTs. The IC is in a 6.0-mm x 4.9-mm package saving significant PCB area as opposed to 3-phase bridge drivers where the ICs often have bulky dimensions (17.9 mm x 10.3 mm in some cases). This smaller size and reduced number of ICs and associated passives components leads to smaller PCB area needed for the circuits to drive IGBTs. Table 1 below highlights some of the key performance advantages of the UCC27712-Q1 half-bridge gate driver over some 3-phase bridge drivers. UCC27712-Q1 Common 3-phase bridge drivers Peak output current (A) >1 <0.5 Rise time (ns) <20 >100 Fall time (ns) <20 >50 Prop delay (ns) <110 >500 Iq (uA) <300 >2500 Operating temperature range (C) Down to -65C Limited to -55C Abs max Package group SOIC | 8 SOIC | 28 Table 1: Performance advantages of the UCC27712-Q1 References: For further information on gate drivers, please see /gatedrivers. Review the automotive HVAC compressor module interactive system block diagram See the automotive high-voltage, high-power motor drive reference design Learn more about the UCC27712-Q1" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC27712_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/893414.json b/data/json/DLP/893414.json new file mode 100644 index 0000000000000000000000000000000000000000..ab242bc3f56b9d152b267b81412179b55f0bf233 --- /dev/null +++ b/data/json/DLP/893414.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "893414", + "reporterName" : "Ryo Akashi", + "rankPoints" : "2740", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS92640: start up issue with low analog dimming", + "rankName" : "Intellectual", + "replies" : " 4", + "views" : " 25", + "queryText" : "Part Number: TPS92640 Hello experts, I got question about start up with low analog dimming from customer. My customer can't start up well when they set low analog dimming. In datasheet P14, I found the discription related with proper start up as below; Vcs should be greater than 10mV. Also, in equation (4), Vcs is defines as Viadj/10. Is this possible to be related with low analog dimming? I'm sorry I'm not clear about relation between Vcs and low analog dimming. I would appreciate if you would give me advice. Thanks and best regards, Ryo Akashi", + "partNumber" : " TPS92640", + "allResponseList" : [ { + "contentId" : "3303603", + "userName" : "Irwin Nederbragt", + "rankPoints" : "20765", + "rankName" : "Mastermind", + "date" : "Apr 1, 2020 2:30 PM", + "userId" : "1880111", + "content" : "Hello Ryo, Have they implemented the offset resistor as described in the datasheet? What are the steps they are taking and when does the issue arise? Are they dimming down via Iadj until the LEDs extinguish? Best Regards," + }, { + "contentId" : "3307544", + "userName" : "Irwin Nederbragt", + "rankPoints" : "20765", + "rankName" : "Mastermind", + "date" : "Apr 6, 2020 1:05 PM", + "userId" : "1880111", + "content" : "Hello Ryo, I haven’t heard back from you, I’m assuming you were able to resolve your issue. If not, just post a reply below (or create a new thread if the thread has locked due to time-out) Best Regards," + }, { + "contentId" : "3307577", + "userName" : "Ryo Akashi", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 6, 2020 1:30 PM", + "userId" : "5298704", + "content" : "Hello Irwin-san, I'm sorry for my late reply. I am confirming with customer, let me ask later. Sorry for making you wait. Thanks and best regards, Ryo Akashi" + }, { + "contentId" : "3326436", + "userName" : "Irwin Nederbragt", + "rankPoints" : "20765", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 12:51 AM", + "userId" : "1880111", + "content" : "Hello Ryo, I'm going to close this since we are working on this issue via email. Best Regards," + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS92640" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/893499.json b/data/json/DLP/893499.json new file mode 100644 index 0000000000000000000000000000000000000000..7eb3fb9b20ac3ef52b621f4a76a0a1fa013b7fec --- /dev/null +++ b/data/json/DLP/893499.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "893499", + "reporterName" : "Wayne Wang20", + "rankPoints" : "2175", + "resolutionStatus" : "", + "ticketName" : "TLV810: TLV810R output drops when its VCC drops", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 25", + "queryText" : "Part Number: TLV810 Hi team, My customer is testing TLV810R. The schematic is as below: Below picture is the waveform(Yellow=VCC, Green=/EN). When VCC is stable@5V, /EN=0V. However, when there's a slight drop(around 0.5V) on VCC, /EN will also show a slight drop. And the drop on /EN makes it output a negative voltage. We also tried to remove R418 but the test result is the same Could you please help analyze why /EN will drop here? Thanks. Best regards, Wayne", + "partNumber" : " TLV810", + "allResponseList" : [ { + "contentId" : "3306749", + "userName" : "Abhinav.Sharma", + "rankPoints" : "6855", + "rankName" : "Expert", + "date" : "Apr 4, 2020 9:36 AM", + "userId" : "4691355", + "content" : "Hi Wayne, could you try to test with removing R339? Thanks, Abhinav." + }, { + "contentId" : "3320882", + "userName" : "Wayne Wang20", + "rankPoints" : "2175", + "rankName" : "Intellectual", + "date" : "Apr 20, 2020 7:47 AM", + "userId" : "4736123", + "content" : "Hi Abhinav, Customer has tried to remove R339 but the output still has a negative spur when Vcc drops. So could you please help try this test on our EVM to see if this behavior is related to TLV810 itself? Thanks. Best regards, Wayne" + }, { + "contentId" : "3327808", + "userName" : "Abhinav.Sharma", + "rankPoints" : "6855", + "rankName" : "Expert", + "date" : "Apr 25, 2020 8:39 AM", + "userId" : "4691355", + "content" : "Hi Wayne, Testing in our labs is currently restricted due to the site being shutdown related to coronavirus. Is this an urgent request/do you have the capabilities to test? Thanks, Abhinav." + } ], + "tags" : [ "/support/power-management/f/196/tags/TLV810" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/893589.json b/data/json/DLP/893589.json new file mode 100644 index 0000000000000000000000000000000000000000..2f12fbcebf0973c793abe85d7bda66f4b1efdb27 --- /dev/null +++ b/data/json/DLP/893589.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "893589", + "reporterName" : "user5014632", + "rankPoints" : "280", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ34Z100-G1: updating calibration data after learning", + "rankName" : "Intellectual", + "replies" : " 13", + "views" : " 62", + "queryText" : "Part Number: BQ34Z100-G1 Hi, I have been doing 10 golden images for different batteries we can use in our products. All batteries are LiFePO4 batteries from the same manufacturer, 5 of them are 4SNP (12.8V nominal voltage) and the 5 other are 8SNP (25.6V nominal voltage) otherwise only the capacity is changing (from 27Ah to 96Ah). I thus have all the gg.csv files exported after the learning cycle that I used to generate the golden images files. However I now realize that the calibration data I used for these learning cycles were not optimum and I would like to modify them to increase precision. As you can guess performing again these 10 learning cycles is not an option Is it possible to modify (slightly, let say +/-5%) the calibration values in the gg.csv file before exporting again the golden image files? What could be the drawbacks of this method? Looking forward to your insights. Best regards, Jeremie", + "partNumber" : " BQ34Z100-G1", + "allResponseList" : [ { + "contentId" : "3304417", + "userName" : "Damian Lewis", + "rankPoints" : "33210", + "rankName" : "Mastermind", + "date" : "Apr 2, 2020 4:48 AM", + "userId" : "69960", + "content" : "Hi Jeremie, There's no harm in modifying the calibration after learning cycle +/-5%, since the gauge will continue learning in the field and can adjust the learned resistance with previous calibration value by up to 15% during one discharge cycle." + }, { + "contentId" : "3304614", + "userName" : "user5014632", + "rankPoints" : "280", + "rankName" : "Intellectual", + "date" : "Apr 2, 2020 8:33 AM", + "userId" : "5014632", + "content" : "Hi Damian, Great! Thank you for your quick answer on that topic. Best regards, Jérémie" + }, { + "contentId" : "3308914", + "userName" : "user5014632", + "rankPoints" : "280", + "rankName" : "Intellectual", + "date" : "Apr 7, 2020 1:19 PM", + "userId" : "5014632", + "content" : "Hi Damian, I am realizing all the possibilities my end application has to get data from the gauge, either from the golden image flash stream or from the gauge itself. I could configure my battery charger directly from these data instead of using separate parameters in my host microcontroller. However I would have to modify additional parameters in the gg.csv after learning, such as Configuration>Data>Cell Charge Voltages, Configuration>Data>Charge Currents, Configuration>Data>JEITA Temperatures... Basically could you indicate which parameters are safe to modify after learning and which should remain unchanged? Best regards, Jérémie" + }, { + "contentId" : "3309327", + "userName" : "Damian Lewis", + "rankPoints" : "33210", + "rankName" : "Mastermind", + "date" : "Apr 7, 2020 5:23 PM", + "userId" : "69960", + "content" : "Hello Jeremie, You can always configure the gauge features to match your application after the learning cycle. The learning cycle is related to the battery cell properties. As long as you don't change the battery chemistry that was used for the learning cycle, you're ok configuring the gauging features and tweaking parameters after the learning cycle." + }, { + "contentId" : "3309339", + "userName" : "user5014632", + "rankPoints" : "280", + "rankName" : "Intellectual", + "date" : "Apr 7, 2020 5:29 PM", + "userId" : "5014632", + "content" : "Hi Damian, Thank you for your quick answer. More than the chem ID, I bet the Ra tables should not be tinkered with either, are you sure there is no other register that should be preserved? (e.g. end of charge taper conditions) I want to make sure I won't jeopardize my learning. Best regards, Jérémie" + }, { + "contentId" : "3309343", + "userName" : "Damian Lewis", + "rankPoints" : "33210", + "rankName" : "Mastermind", + "date" : "Apr 7, 2020 5:35 PM", + "userId" : "69960", + "content" : "Hi Jeremie, That's correct. The Ra and Qmax is part of the chem ID and what are learned during the learning cycle." + }, { + "contentId" : "3310053", + "userName" : "user5014632", + "rankPoints" : "280", + "rankName" : "Intellectual", + "date" : "Apr 8, 2020 8:42 AM", + "userId" : "5014632", + "content" : "Hi Damian, Thank you for this clarification. I read that as part of the golden image generation process it was advisable to average the calibration values over several boards (This i why I started asking about calibration modification after learning). Following the same reasoning, is it safe (or even advisable as well) to average Ra tables and Qmax values over several learning cycles of different production grade batteries ? Looking forward on your insight. Best regards, Jérémie" + }, { + "contentId" : "3310747", + "userName" : "Damian Lewis", + "rankPoints" : "33210", + "rankName" : "Mastermind", + "date" : "Apr 8, 2020 7:10 PM", + "userId" : "69960", + "content" : "Hi Jeremie, user5014632 Following the same reasoning, is it safe (or even advisable as well) to average Ra tables and Qmax values over several learning cycles of different production grade batteries ? No you don't have to average Ra or Qmax because it's learned and updated in the field. The recommendation is to run an optimization cycle once you have your prototype build, if you want to do due diligence." + }, { + "contentId" : "3311318", + "userName" : "user5014632", + "rankPoints" : "280", + "rankName" : "Intellectual", + "date" : "Apr 9, 2020 10:04 AM", + "userId" : "5014632", + "content" : "Hi Damian, Since these values are learned and updated in the field I am wondering whether the learning cycle is really necessary. Actually I do have access to the real capacity (Qmax) of my batteries, and I notice that across different number of series cell and capacities the Ra tables are pretty similar (see below) Would it be possible in that context (same battery manufacturer, same cell model) to \"build\" a golden image by setting the Ra table, Ra flag and Qmax in the gg.csv file without performing a learning cycle? Best regards, Jérémie" + }, { + "contentId" : "3311695", + "userName" : "Damian Lewis", + "rankPoints" : "33210", + "rankName" : "Mastermind", + "date" : "Apr 9, 2020 3:57 PM", + "userId" : "69960", + "content" : "Jeremie, I would recommend doing a learning cycle one of the cell first then you can fan it out appropriately to other cell configurations. The reason for this even though learning is done in the field it's filtered/limited. The resistance isn't allowed to change more that 15% per discharge cycle whereas learning cycle is unfiltered and without the restrictions." + } ], + "tags" : [ "/support/power-management/f/196/tags/golden%2bimage", "/support/power-management/f/196/tags/calibration", "/support/power-management/f/196/tags/BQ34Z100_2D00_G1", "/support/power-management/f/196/tags/gg-csv" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/893597.json b/data/json/DLP/893597.json new file mode 100644 index 0000000000000000000000000000000000000000..f31c9715fc7b47fb924c12c35900a3f308caba41 --- /dev/null +++ b/data/json/DLP/893597.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "893597", + "reporterName" : "Istvan Hegedus", + "rankPoints" : "30", + "resolutionStatus" : "", + "ticketName" : "TPS40210: Unstable power supply found on several boards", + "rankName" : "Prodigy", + "replies" : " 5", + "views" : " 44", + "queryText" : "Part Number: TPS40210 Hi, At our company we have an ultrasound design with TPS40210 power supply (for the ultrasound transducer). Input is 6...8.4V (2x Li-ion batteries), output is +/-85V. Schematic is attached below: Switching frequency is set to approx. 230kHz. 82kOhm resistors are the basic load of the circuit. 'Real load' comes only when pulsing is switched on but it is just several mA, not so much (because overall duty cycle of the pulsing is very low). We made two batches of the board, totally 12pcs (2x 6pcs). We found 1-1 boards in both batches with unworking supply. They just cannot switch on even without the pulsing load. Output is trying to set up but cannot so it is unexpectedly swinging between several V and several 10V. SS pin was checked and found the overcurrent condition specified in the datasheet (switching on/off in every 2s). I tried to decrease R48 down to around 55mOhm (2x 0.15 Ohm added parallel) but no change was found. I changed coil to 220uH but he same result was found. I tryed to decrease the output voltage to half of the current but did not help. I am sure this is not a technology issue (our assembly house always makes quite good work) but a design issue. Any idea, what to change or recalculate? Best regards, Istvan", + "partNumber" : " TPS40210", + "allResponseList" : [ { + "contentId" : "3304209", + "userName" : "Richard Fu22", + "rankPoints" : "2925", + "rankName" : "Intellectual", + "date" : "Apr 1, 2020 11:15 PM", + "userId" : "5003147", + "content" : "Hi Istvan, Sorry to hear that you are having trouble. From a first glance, it appears that you have designed the boost converter correctly. Can you give scope shots (a few cycles) of the COMP, SW, and SS, and DIS pin? Thanks, Richard" + }, { + "contentId" : "3311806", + "userName" : "Istvan Hegedus", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 9, 2020 5:21 PM", + "userId" : "6311240", + "content" : "Dear Richard, Thank you for your fast response. I am measuring the following results and plots: SS is continuously restarting: Like overcurrent condition specified in the datasheet. But only two of the boards are showing this out of 12, and output current is very low, even when it is loaded. The one what I am testing shows this plot with the 0.22 Ohm current sense resistor reduced to about 0.055 Ohm. RC pin looks to be fine, around 240kHz switching frequency, as planned originally: ISNS (Current Sense) pin shows some interesting behavior, peaks at about two seconds, like overcurrent, although there is not much output current (and capacitance). Looking it a bit closer: Power MOSFET Gate has a similar power up/down pattern. It is starting in every ~2s with somewhat different duty cycle: On HV_POS output of the regulator seems to be a bit crazy with some unexpected peaks: Any idea what to change to resolve the issue? Istvan" + }, { + "contentId" : "3320107", + "userName" : "Richard Fu22", + "rankPoints" : "2925", + "rankName" : "Intellectual", + "date" : "Apr 17, 2020 11:59 PM", + "userId" : "5003147", + "content" : "Hi Istvan, Sorry for the delay. Is it possible for you to DNP C54 to see if the initial positive rail is working? Do your other boards regulate correctly? My understanding so far is based on that if your other boards are able to start-up and can regulate properly, it may be an issue intrinsic to this board, even if the assembler does quite good work. Design wise, your schematic looks quite similiar to this one: /tool/PMP10091, so I would suspect the schematic to be okay. Thanks, Richard" + }, { + "contentId" : "3323926", + "userName" : "Istvan Hegedus", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 7:45 AM", + "userId" : "6311240", + "content" : "Hi Richard, Sure, I will test it when I visit the lab next time (we are on home office at the moment and I visit the lab only once a week or so). Probably on Friday. I will give you a feedback. Originally I had 2 boards with this issue. On one board I replaced the controller and it started to work well. Now I have a second board so I have to investigate (once never-twice always, you know). Other 12 boards are regulating correctly. I know this schematic, I used it as one of the base of my schematic. BTW, what about the component values? Are they correct? Can a miscalculation cause a similar issue, or is it impossible? It is not fully clear to me how to calculate the feedback compensation network values. A small program for this calculation would help a lot at this point but could not find any oncompany website. Regards, Istvan" + }, { + "contentId" : "3329646", + "userName" : "Richard Fu22", + "rankPoints" : "2925", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 11:57 PM", + "userId" : "5003147", + "content" : "Hi Istevan, The component values look correct to me, and if a miscalculation caused a similar issue, this would have shown up across all the boards. As for the compensation values, you can generally follow the method described in the datasheet, but will need to tweak the values when running the board. Thanks, Richard" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS40210" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/893703.json b/data/json/DLP/893703.json new file mode 100644 index 0000000000000000000000000000000000000000..bd45db352d111f159d9d1522f9713624baa7d5d7 --- /dev/null +++ b/data/json/DLP/893703.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "893703", + "reporterName" : "Carlo Cabaccan", + "rankPoints" : "2530", + "resolutionStatus" : "", + "ticketName" : "UC1842A-EP: ESD HBM Rating", + "rankName" : "Intellectual", + "replies" : " 5", + "views" : " 61", + "queryText" : "Part Number: UC1842A-EP Hi team, Good day. What is the ESD HBM of the following part numbers? TPS54610-EP UC1842A-EP UC2825A-Q1 UC2845AQ TPS51100 REG1117A REG1117 TL1431-Q1 Regards, Carlo", + "partNumber" : " UC1842A-EP", + "allResponseList" : [ { + "contentId" : "3304498", + "userName" : "Teng Feng", + "rankPoints" : "9390", + "rankName" : "Genius", + "date" : "Apr 2, 2020 6:44 AM", + "userId" : "5617595", + "content" : "Hi Carlo, I need to check with the team in US about ESD of UC1842A-EP and UC2825A-Q1.. UC1842A-EP UC2825A-Q1 The automotive ESD rating of UC2845AQ is 2000V for HBM and 1000V for CDM. Could you please create new posts for below device, since they are not HVP devices, thank you. APP==>BSR==>BSR-LV TPS54610-EP APP==>BMC==>BMC-MCS TPS51100 APP==>LP==>LP-LDO REG1117A REG1117 APP==>LP==>LP-VRS TL1431-Q1" + }, { + "contentId" : "3309533", + "userName" : "Carlo Cabaccan", + "rankPoints" : "2530", + "rankName" : "Intellectual", + "date" : "Apr 7, 2020 8:26 PM", + "userId" : "5915269", + "content" : "Hi Teng, Do we have an update for this? Thank you. Regards, Carlo" + }, { + "contentId" : "3315900", + "userName" : "Carlo Cabaccan", + "rankPoints" : "2530", + "rankName" : "Intellectual", + "date" : "Apr 14, 2020 9:16 PM", + "userId" : "5915269", + "content" : "Hi Teng, Do we have the ESD rating of UC1842A-EP and UC2825A-Q1? Thank you. Regards, Carlo" + }, { + "contentId" : "3322610", + "userName" : "Teng Feng", + "rankPoints" : "9390", + "rankName" : "Genius", + "date" : "Apr 21, 2020 10:08 AM", + "userId" : "5617595", + "content" : "Hi Carlo, The ESD rating of UC1842A-EP is 2500V for HBM and 1500V for CDM. And I will updated the UC2825A-Q1 later. Regard, Teng" + }, { + "contentId" : "3328935", + "userName" : "Carlo Cabaccan", + "rankPoints" : "2530", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 2:48 PM", + "userId" : "5915269", + "content" : "Hi Teng, Thank you for providing the ESD data of UC1842A-EP. I'll be waiting for your update for the UC2825A-Q1. Regards, Carlo" + } ], + "tags" : [ "/support/power-management/f/196/tags/TL1431_2D00_Q1", "/support/power-management/f/196/tags/reg1117", "/support/power-management/f/196/tags/UC2845AQ", "/support/power-management/f/196/tags/UC1842A_2D00_EP", "/support/power-management/f/196/tags/REG1117A", "/support/power-management/f/196/tags/UC2825A_2D00_Q1", "/support/power-management/f/196/tags/TPS51100", "/support/power-management/f/196/tags/TPS54610_2D00_EP" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/893724.json b/data/json/DLP/893724.json new file mode 100644 index 0000000000000000000000000000000000000000..052f1918169333018aee0800183c078acff2ab37 --- /dev/null +++ b/data/json/DLP/893724.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "893724", + "reporterName" : "Andrew Orosz", + "rankPoints" : "30", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ27510-G3: Low Current Application", + "rankName" : "Prodigy", + "replies" : " 5", + "views" : " 51", + "queryText" : "Part Number: BQ27510-G3 A product that I am working on is using the BQ27510-G3. It has been observed that the fuel gauge has reported incorrectly in the following instance. When testing the device's battery life in shelf mode, the device did not report a linear discharge, which was expected. The reported discharge was closer to an exponential trend line. Current draw while in shelf mode is in the range of 50 - 100 uA. The biggest difference observed between expected and actual SoC was roughly 20%. It seems that the BQ27510 relies on open circuit voltage (OCV) measurements when the current is low. Is it possible that there is something in the implementation of the BQ27510 that would cause the OCV measurements to be off?", + "partNumber" : " BQ27510-G3", + "allResponseList" : [ { + "contentId" : "3304177", + "userName" : "Dominik Hartl11", + "rankPoints" : "35875", + "rankName" : "Mastermind", + "date" : "Apr 1, 2020 10:21 PM", + "userId" : "9849", + "content" : "Do both filtered and unfiltered RM and both smoothed SOC and true SOC change unexpectedly or only the filtered/smoothed values?" + }, { + "contentId" : "3312042", + "userName" : "Andrew Orosz", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 9, 2020 9:46 PM", + "userId" : "5777243", + "content" : "The SOC value I was referring to is shown below. RM was not being used. The SOC value appears to not be smoothed. See below the data returned from a read of OpConfig D register. b" + }, { + "contentId" : "3312068", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 9, 2020 10:31 PM", + "userId" : "3528441", + "content" : "Hello Andrew, Can you provide a bqStudio log file and your gg.csv file at the beginning of the test? What do you mean the SOC is not being smoothed?" + }, { + "contentId" : "3323121", + "userName" : "Andrew Orosz", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 4:07 PM", + "userId" : "5777243", + "content" : "There is no log file for the test because the test was ran on a fully assembled device to determine the shelf mode battery life. I have attached the gg.csv file. Regarding the SOC not being smoothed, the previous reply shows 00 at register 5E. This seems to show that bit6 (SMTHEN) is low, meaning that the SOC value is not being smoothed/filtered. See picture below taken from SLUUA97. 2337.0510_4_00-bq27510G3.gg.csv" + }, { + "contentId" : "3327625", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 24, 2020 10:12 PM", + "userId" : "3528441", + "content" : "In order to further debug, is it possible to take the battery out and put it on EV2400 + bqStudio to get a log file to look at RSOC performance?" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ27510_2D00_G3", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2b%2bBQstudio", "/support/power-management/f/196/tags/BQ27510" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/893860.json b/data/json/DLP/893860.json new file mode 100644 index 0000000000000000000000000000000000000000..2b69093a7de3ede44144434c6d092e99ea49b96a --- /dev/null +++ b/data/json/DLP/893860.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "893860", + "reporterName" : "Marcel Fischer", + "rankPoints" : "130", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ27750: Question regarding remaining energy in cWh", + "rankName" : "Prodigy", + "replies" : " 13", + "views" : " 112", + "queryText" : "Part Number: BQ27750 Hello, in our device we're using a LiPo battery pack with BQ27750 fuelgauge chip. We want to use the remaining energy in cWh and a constant power consumption value to calculate and display the remaining runtime of our device. In several logs of discharging our device we were facing a non-linearity of the remaining energy value after about 100 minutes of device runtime. Attached you will find a typical log file where you can see in column \"Z\" the remaining energy in cWh which is descending from line to line in a linear way. In line 83 you can see that the remaining energy value jumps from 558 to 570 cWh without any change of the load. This behavior is the same in all log files and for different battery packs + devices and leads to an increase of remaining runtime of about 15 minutes which will be displayed during discharge process. We want to understand why the the remaining energy is jumping all the time after more or less the same device runtime (after about 100 minutes) and if there is a way to prevent this jumps. Thanks in advance! Best regards, Marcel fuelgauge_COM14_20200325.csv", + "partNumber" : " BQ27750", + "allResponseList" : [ { + "contentId" : "3305194", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 2, 2020 5:01 PM", + "userId" : "1864278", + "content" : "Can you also provide your gg file? Thanks." + }, { + "contentId" : "3305753", + "userName" : "Marcel Fischer", + "rankPoints" : "130", + "rankName" : "Prodigy", + "date" : "Apr 3, 2020 5:54 AM", + "userId" : "5977658", + "content" : "Hi Andy, you will find the corresponding gg-File attached. Thanks and best regards, Marcel BQ27750_gg-File_clean.gg.csv" + }, { + "contentId" : "3306632", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 4, 2020 12:08 AM", + "userId" : "1864278", + "content" : "Hi Marcel, I have checked your log file and it doesn't seem like a bqStudio log. I would need your help to provide a bqStudio file so that I can see much more detailed information. Also, make sure you set the log interval to 3 or 4 seconds. Andy" + }, { + "contentId" : "3320954", + "userName" : "Marcel Fischer", + "rankPoints" : "130", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 8:59 AM", + "userId" : "5977658", + "content" : "Hi Andy, first of all sorry for my late reply - I was on vacation in the meanwhile. You're right that it's not a log file which was written from bqStudio. The log file was directly written by a script which operates with our device. That's also the reason why I can't provide you a bqStudio log, because we need to discharge the battery pack in our device. I cannot reproduce exactly the same load for the battery pack when logging with bqStudio. But you can find all relevant registers from BQ27750 chip in the given log file. Best regards, Marcel" + }, { + "contentId" : "3321713", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 5:36 PM", + "userId" : "1864278", + "content" : "Hi Marcel, The bq27750 has a lot of run-time information. Without sufficient data, it is almost impossible for me to tell you the cause. That's why I require a bqStudio log file. Andy" + }, { + "contentId" : "3322611", + "userName" : "Marcel Fischer", + "rankPoints" : "130", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 10:08 AM", + "userId" : "5977658", + "content" : "Hi Andy, I'm currently trying a test setup where the battery pack I2C terminals are connected to bqStudio which is logging every 3000ms. The plus/minus terminals are connected to our device for discharging the battery pack. The only problem is that our device now doesn't know that it will be powered with a battery pack because there is no I2C communication available. The load should be the same but the battery pack will be discharged until cut-off voltage now. Normally our device shutdown and stops discharging in a controlles manner with a certain reserve of remaining capacity. I'll let you know tomorrow if it worked well. BR's Marcel" + }, { + "contentId" : "3323823", + "userName" : "Marcel Fischer", + "rankPoints" : "130", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 6:02 AM", + "userId" : "5977658", + "content" : "Hi Andy, attached you will find the bqStudio log file. You can see in line 1881 that \"TrueRemE\" jumps from 596 cWh to 609 cWh during discharging process without any changes of the load. That's not really nice because it leads to a suddenly increased displayed remaining runtime during discharging process. BR's Marcel EDIT: It seems that the remaining energy after about 100 minutes of device runtime (after the jump) is more reliable regarding the calculation of the remaining runtime. bqStudio_log_FMO1_clean.log" + }, { + "contentId" : "3327615", + "userName" : "Eric Vos24", + "rankPoints" : "3585", + "rankName" : "Expert", + "date" : "Apr 24, 2020 10:05 PM", + "userId" : "3440231", + "content" : "Marcel, TrueRemCap and TrueRemE will change anytime the gauge triggers a new simulation. Each simulation is run with a different set of inputs. Rate, Resistance, and temperature all all things that change. The amplitude of the change depends greatly on the new conditions. The jump you see if most likely a small resistance update and is expected behavior. If you want the value to not change please use the \"Smoothed\" value. This will remain constant but would makeup and delta over the remaining section of the discharge. Thanks, Eric Vos" + }, { + "contentId" : "3328523", + "userName" : "Marcel Fischer", + "rankPoints" : "130", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 9:12 AM", + "userId" : "5977658", + "content" : "Hi Eric, thanks for your reply. We don't get what you mean with \"smoothed\" value ? Where can we get it and what does it make ? We're also wondering why the simulation seems to start everytime after about 100 minutes of device runtime. There is no change of temperature or anything else. Is there a way to let the gauge trigger a new simulation after some seconds of device runtime ? Best regards, Marcel" + }, { + "contentId" : "3328773", + "userName" : "Eric Vos24", + "rankPoints" : "3585", + "rankName" : "Expert", + "date" : "Apr 27, 2020 1:23 PM", + "userId" : "3440231", + "content" : "Marcel, During discharge the gauge will hit points that we call grid points which will trigger a simulation. This is where resistance is calculated and gets updated. If you have [SMOOTH] enabled in the settings DataMemory page then the gauge will report a filtered FCC and remcap on [Full Charge Capacity] and [Remaining Capacity]. In addition, [Flt Remcap] and [Flt FCC] are also reported. Thanks, Eric Vos" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ27750" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/893973.json b/data/json/DLP/893973.json new file mode 100644 index 0000000000000000000000000000000000000000..d4b0add9b6a8c6de740a55c6b5f82233e07a9e11 --- /dev/null +++ b/data/json/DLP/893973.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "893973", + "reporterName" : "Sara Jia", + "rankPoints" : "2835", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS23756: CS communication failed", + "rankName" : "Expert", + "replies" : " 2", + "views" : " 18", + "queryText" : "Part Number: TPS23756 Hi Sir, My ctm uses tps23756 as their poe source. when start poe func, the cs mesh port communicates failed. we doubt because of the unsuitable design of the voltage transformer,would you pls give some recommendations on this issue? BR Sara", + "partNumber" : " TPS23756", + "allResponseList" : [ { + "contentId" : "3305145", + "userName" : "Michael Pahl", + "rankPoints" : "4915", + "rankName" : "Expert", + "date" : "Apr 2, 2020 4:30 PM", + "userId" : "6102321", + "content" : "Hello Sara, I can speak to the operation of the TPS23756. I cannot speak to the data or communication protocols. At a high level, if the power path is interrupting the data path, it sounds like there is an isolation issue. Whether that is grounding, signal path or some sort of coupling would take some debug work to validate. One way to control the ramp is to increase the input bulk capacitance, which will slow down the turn on time. I would encourage you to work with the PHY vendor support system as well to get multiple debug angles on it. If this post answers your question, please indicate so by marking this thread as resolved. Thank you. Regards, Michael P. Applications Engineer customer organization" + }, { + "contentId" : "3324524", + "userName" : "Michael Pahl", + "rankPoints" : "4915", + "rankName" : "Expert", + "date" : "Apr 22, 2020 3:31 PM", + "userId" : "6102321", + "content" : "Hello, This thread has not had a post in a few weeks. I am going to close it, but feel free to reopen it by posting a reply. Or, you can open a new thread. Thank you. Regards, Michael Pahl" + } ], + "tags" : [ "/support/power-management/f/196/tags/tps23756" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/894013.json b/data/json/DLP/894013.json new file mode 100644 index 0000000000000000000000000000000000000000..89b308092692690ae02e4148679d28a7c6bf0bda --- /dev/null +++ b/data/json/DLP/894013.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "894013", + "reporterName" : "Paul Landini", + "rankPoints" : "135", + "resolutionStatus" : "", + "ticketName" : "TPS63805EVM-026: Changing the input voltage", + "rankName" : "Prodigy", + "replies" : " 15", + "views" : " 89", + "queryText" : "Part Number: TPS63805EVM-026 Hi, I am using the TPS63805EVM evaluation board. I configured the output for 4.9V at 1A, and my input is a 3V power supply. The board was working well until I turned my power supply down from 3V to 2.5V. Once I did that, the board stopped working and even with no load on the output, all of the power sent to the input of the device goes to ground and does not regulate the output at 4.9V. Do you know what I did wrong? Thanks", + "partNumber" : " TPS63805EVM-026", + "allResponseList" : [ { + "contentId" : "3305462", + "userName" : "Milos", + "rankPoints" : "7260", + "rankName" : "Expert", + "date" : "Apr 2, 2020 9:39 PM", + "userId" : "5692358", + "content" : "Hi Paul, Thanks for reaching out. The TPS63805 can support more than 1 A at Vout = 4.9 V, Vin = 2.5 V, unless it is damaged or something else is not functioning. Is your EVM not working anymore, even at higher input voltages? Does the input acts as a short and the output voltage is 0 V? Can you confirm that there is no switching action on L1 and L2 pins? Best regards, Milos" + }, { + "contentId" : "3306115", + "userName" : "Paul Landini", + "rankPoints" : "135", + "rankName" : "Prodigy", + "date" : "Apr 3, 2020 1:59 PM", + "userId" : "5985809", + "content" : "Hi Milos, 1. The EVM is not working anymore, even at higher input voltages. 2. Yes, the input is acting as a short to ground and the output is 0V. 3. I measured the switching on the L1 and L2 pins and there is no action. Thanks very much, Paul" + }, { + "contentId" : "3306221", + "userName" : "Milos", + "rankPoints" : "7260", + "rankName" : "Expert", + "date" : "Apr 3, 2020 3:22 PM", + "userId" : "5692358", + "content" : "Hi Paul, It seems that the device got damaged for some reason. That should't happened, since it can deliver more than 1 A under your conditions. What did you have connected on the output as the load? Did you have a current limit turned on on your power supply, and are you using short wires between the power supply and the EVM? The only thing that should have changed while you reduced your input voltage from 3 V to 2.5 V is the input current, approximately from 1.8 A to 2.2 A. Are you able to replace the unit on the EVM with another one? Best regards, Milos" + }, { + "contentId" : "3306309", + "userName" : "Paul Landini", + "rankPoints" : "135", + "rankName" : "Prodigy", + "date" : "Apr 3, 2020 4:41 PM", + "userId" : "5985809", + "content" : "Hi Milos, For the load, I had a 5F capacitor as well as an electronic load that was set to pull 4.9W (so the output current was about 1A from the EVM). The current limit on my power supply was set to 3A, and I have fairly short wires in my system. That is what I was expecting as well. I turned the input voltage down expecting to see a rise in input current. I have a spare EVM that I am using right now at 3V and it is working. Later I will attempt to turn the system on with the input already set to 2.5V, instead of me dialing it down manually. Thanks, Paul" + }, { + "contentId" : "3306533", + "userName" : "Milos", + "rankPoints" : "7260", + "rankName" : "Expert", + "date" : "Apr 3, 2020 9:16 PM", + "userId" : "5692358", + "content" : "Hi Paul, In one of our tests we ramp the input voltage up and down. This is for Iout = 1 A, Vout = 5.2 V, which is close to your case: So, yes, please check another device under the same conditions. I can't see any reason why the device would fail. Best regards, Milos" + }, { + "contentId" : "3307727", + "userName" : "Paul Landini", + "rankPoints" : "135", + "rankName" : "Prodigy", + "date" : "Apr 6, 2020 3:08 PM", + "userId" : "5985809", + "content" : "Milos, I tested another device but the same thing happened. Is it possible that the presence of the supercapacitor (5F) on the output of my system is drawing too much inrush current and hurting the device? Thanks, Paul" + }, { + "contentId" : "3309037", + "userName" : "Milos", + "rankPoints" : "7260", + "rankName" : "Expert", + "date" : "Apr 7, 2020 2:33 PM", + "userId" : "5692358", + "content" : "Hi Paul, Just to check, you changed the input voltage down in a step, not gradually? Also, was it set to PFM or PWM mode? Best regards, Milos" + }, { + "contentId" : "3310388", + "userName" : "Paul Landini", + "rankPoints" : "135", + "rankName" : "Prodigy", + "date" : "Apr 8, 2020 2:23 PM", + "userId" : "5985809", + "content" : "Hi Milos, I turned the voltage down on my power supply from 3V to 2.5V gradually, over the span of a few seconds or so. At the time of the anomaly it was set to PWM mode, though my plan was to test both modes. Thanks, Paul" + }, { + "contentId" : "3310869", + "userName" : "Milos", + "rankPoints" : "7260", + "rankName" : "Expert", + "date" : "Apr 8, 2020 9:40 PM", + "userId" : "5692358", + "content" : "Hi Paul, Thank you for the info. My guess is that the decrease in input voltage forces the inductor current in reverse initially. If your power supply cannot sink current, this would ramp up the input voltage. However, the device has an overvoltage protection that should prevent the input voltage from rising above 5.7 V. We will have to try reproducing this in the lab. It might take a few days due to the outbreak and limited lab access, please excuse the delay. Best regards, Milos" + }, { + "contentId" : "3311434", + "userName" : "Paul Landini", + "rankPoints" : "135", + "rankName" : "Prodigy", + "date" : "Apr 9, 2020 12:35 PM", + "userId" : "5985809", + "content" : "Milos, No problem - thank you very much for the continued support. Please let me know what you find. Paul" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS63805EVM_2D00_026" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/894069.json b/data/json/DLP/894069.json new file mode 100644 index 0000000000000000000000000000000000000000..4d7d3082f30d3665113f3c72ae7fa2e8ce12d166 --- /dev/null +++ b/data/json/DLP/894069.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "894069", + "reporterName" : "user4465586", + "rankPoints" : "30", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "On the problem of the output voltage instability of LM25145", + "rankName" : "Prodigy", + "replies" : " 6", + "views" : " 62", + "queryText" : "Our company is using this power solution for the first time. There are two power supplies on the module, 24V power supply, one design output 3V, one design output 4V, the following problems exist: 1. The output of 3V, the actual output is 2.8V, with a 1A constant resistance load, the output voltage drops to about 1V; 2. The output 4V, without load, the output voltage is 1.8V; 3. Remove the capacitor connected to the soft-start pin SS. The two outputs return to normal and the load is normal. Hopecompany can provide a solution, thank you.", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3305710", + "userName" : "Timothy Hegarty", + "rankPoints" : "13220", + "rankName" : "Genius", + "date" : "Apr 3, 2020 4:42 AM", + "userId" : "1877696", + "content" : "HI user, I recommend completing the LM25145 quickstart file to check compensation values. The file can be downloaded from the product folder. Please send this completed file and your PCB layout for review. Note that a SS cap is required here as it is also used for stability of the SS-to-FB clamp amplifier. It should be connected close to the SS and AGND pins. Also, what FETs are used here? REgards, Tim" + }, { + "contentId" : "3305812", + "userName" : "user4465586", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 3, 2020 7:23 AM", + "userId" : "4465586", + "content" : "UNI-FSDB01-V1.1-R SCH.pdf" + }, { + "contentId" : "3305815", + "userName" : "user4465586", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 3, 2020 7:24 AM", + "userId" : "4465586", + "content" : "UNI-FSDB01-V1.1-R PCB.pdf" + }, { + "contentId" : "3310964", + "userName" : "Timothy Hegarty", + "rankPoints" : "13220", + "rankName" : "Genius", + "date" : "Apr 9, 2020 12:48 AM", + "userId" : "1877696", + "content" : "Thanks for sending the schematic and PCB. Please send a completed LM25145 quickstart file: /tool/LM25145DESIGN-CALC Regards, Tim" + }, { + "contentId" : "3327633", + "userName" : "Timothy Hegarty", + "rankPoints" : "13220", + "rankName" : "Genius", + "date" : "Apr 24, 2020 10:19 PM", + "userId" : "1877696", + "content" : "Here are some notes on the schematic: Input UVLO divider should be taken directly form the input bus (not the VIN pin of the controller). Check stability using the quickstart calculator (see link above) at the two output voltage settings. Use the effective value for output capacitance (derated for Vout). NC pin 9 can be tied to the DAP on the PCB. Regards, Tim" + }, { + "contentId" : "3327639", + "userName" : "Timothy Hegarty", + "rankPoints" : "13220", + "rankName" : "Genius", + "date" : "Apr 24, 2020 10:33 PM", + "userId" : "1877696", + "content" : "In terms of the layout, app note SNVA803 specifies best practices for the power stage. This includes tight input capacitor placement to keep the switching loop parasitic inductance as low as possible. Also, the copper area for SW should be as small as possible to mitigate EMI (no vias to inner layers either). Gate drive traces should be short and direct (at least 25 mils wide) and HO and SW should be routed as a diff pair. The high-side FET is the hotspot, so use VIN copper for heatsinking. For the controller layout, consider adding an AGND island, similar to that used in the LM5145 and LM5146-Q1 EVMs, and place the lower FB resistor directly from FB to AGND close to the pins. See the controller datasheet PCB layout guidelines for more detail." + } ], + "tags" : [ "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2bDC_2F00_DCconverter", "/support/power-management/f/196/tags/LM25145" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/894089.json b/data/json/DLP/894089.json new file mode 100644 index 0000000000000000000000000000000000000000..8a233aa873ba61d571fac750b5cfb0e874bf1652 --- /dev/null +++ b/data/json/DLP/894089.json @@ -0,0 +1,87 @@ +{ + "ticketNumber" : "894089", + "reporterName" : "user3502896", + "rankPoints" : "70", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ24650: Replace UC2906DW with BQ24650", + "rankName" : "Prodigy", + "replies" : " 9", + "views" : " 48", + "queryText" : "Part Number: BQ24650 Hello at the Moment i design a new system with lead acid batteries. My System hat 24 V DC Supply an 2 Leadacid batteries in Series. At the Moment i use the compination Step up converter and UC2906DW. I like to change the batterie charger to the BQ24650. I guess that i did not need a step up converter. Know my Question: Can the BQ24650 charger two lead acid batteries in Series? Every Battery has 12 C DC. At the moment i Charger with 27.6 V If the Power is lost i switch a Relais to supply from the batteries. Can some help me in this case? Kind Regards Oliver", + "partNumber" : " BQ24650", + "allResponseList" : [ { + "contentId" : "3306696", + "userName" : "Kedar Manishankar", + "rankPoints" : "9290", + "rankName" : "Genius", + "date" : "Apr 4, 2020 4:08 AM", + "userId" : "4996925", + "content" : "Hi, BQ24650 has a recommended maximum input voltage rating of 28V, and supports a battery voltage of upto 26V. As this is a buck charger, it requires an input voltage higher than the output voltage and the minimum threshold is defined by the SLEEP comparator, which can be found in the EC table of the datasheet. If you are not using a solar panel as your input source it is recommended to use BQ24610 instead, as the mechanism to charge the lead acid batteries is the same for 610 as it is for 650." + }, { + "contentId" : "3306785", + "userName" : "user3502896", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 4, 2020 12:57 PM", + "userId" : "3502896", + "content" : "Hello Thanks for your answer. I think i have to discripe my problem one more time. I search for a Solution without step up. So my first idea was the BQ24650 i think there is a step up funktion includet. I made a drawing for better discusionBRN3C2AF4CED649_000008.pdf" + }, { + "contentId" : "3313766", + "userName" : "Kedar Manishankar", + "rankPoints" : "9290", + "rankName" : "Genius", + "date" : "Apr 13, 2020 2:52 PM", + "userId" : "4996925", + "content" : "Hi, I cannot read the text for what is in between output of BQ24650 and SYSTEM. This is a valid way of using BQ24650, as you can refer to the user guide which contains the EVM schematic where this configuration is implemented. in the EVM a simple diode is placed between the battery and SYS, so that when input adapter is present, the diode will reverse bias and adapter will solely provide SYS, and when adapter is removed, the diode will forward bias and battery will provide SYS." + }, { + "contentId" : "3314768", + "userName" : "user3502896", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 14, 2020 5:41 AM", + "userId" : "3502896", + "content" : "Hello Between the BQ24650 an the System is relay. In Case the external 24V supply has a breakdown, the relay switch the battreries to the system. I do not use a diode, cause my normal voltage is 24 Volt an not 27,6 V. I have a solution with the UC2906 but i think this IC is very old an the new one is better." + }, { + "contentId" : "3316575", + "userName" : "Kedar Manishankar", + "rankPoints" : "9290", + "rankName" : "Genius", + "date" : "Apr 15, 2020 12:04 PM", + "userId" : "4996925", + "content" : "Hi User, What is the maximum charge voltage of your batteries? What value will you be looking to configure the charge regulation voltage of the BQ24650 to?" + }, { + "contentId" : "3320745", + "userName" : "user3502896", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 5:32 AM", + "userId" : "3502896", + "content" : "Hello the maximum charge voltage of the Batteries is 28,2 Volt. I will set it to 27.6 Volt. My Inputvoltage for the charger is24 Volts. Kind regards Oliver" + }, { + "contentId" : "3321559", + "userName" : "Kedar Manishankar", + "rankPoints" : "9290", + "rankName" : "Genius", + "date" : "Apr 20, 2020 4:10 PM", + "userId" : "4996925", + "content" : "Hi Oliver, This is not a possible use case for BQ24650. BQ24650 is a buck charger, which means it steps down the input voltage to the output voltage, and needs an input voltage higher than the output voltage. The SLEEP specification in the datasheet is the minimum difference between input and output voltage that the charger needs to remain operational. In SLEEP mode the charger is disabled and enters a low quiescent current mode, so for your system the charger would be disabled as battery nears full charge. For such a system you would need to incorporate a buck-boost charger, which could handle buck charging when battery is discharged, and boost charging when battery is near full charge (higher than input voltage). This is what I referenced in the first response as well. For buck-boost portfolio you can refer to BQ25713 or BQ25710 depending on communication interface preference SMBus vs I2C. There is no standalone buck-boost charger." + }, { + "contentId" : "3322634", + "userName" : "user3502896", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 10:41 AM", + "userId" : "3502896", + "content" : "Hello i think the bestway is a step up converter to 32 Volt. For charging i think the best Way ist to use UC2906DW or BQ24450. So i can use a standart applikation." + }, { + "contentId" : "3322907", + "userName" : "Kedar Manishankar", + "rankPoints" : "9290", + "rankName" : "Genius", + "date" : "Apr 21, 2020 2:11 PM", + "userId" : "4996925", + "content" : "Hi, The issue with BQ24650 is that the max recommended operating condition is for a 28V max input voltage, so stepping up 24V input adapter to 32V would not be feasible. Even though the abs max is rated higher than this, we do not recommend using larger than a 28V input voltage applied to VCC of BQ24650. This is not enough headroom for your charge regulation voltage, for the charger to be able to operate correctly. I am not familiar with the UC2906DW so I cannot comment on that" + } ], + "tags" : [ "/support/power-management/f/196/tags/_2300_%2b%2b%2bPower%2bManagement", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2bplease%2bhelp", "/support/power-management/f/196/tags/bq24650" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/894115.json b/data/json/DLP/894115.json new file mode 100644 index 0000000000000000000000000000000000000000..6d6d461e6ec6d875af3f8f630435de8f6a12285d --- /dev/null +++ b/data/json/DLP/894115.json @@ -0,0 +1,71 @@ +{ + "ticketNumber" : "894115", + "reporterName" : "Tony Lim1", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCD90120A: Potential data flash corruption", + "rankName" : "Prodigy", + "replies" : " 7", + "views" : " 57", + "queryText" : "Part Number: UCD90120A I have a board with UCD90120A being used as power sequencer. The UCD90120A has been programmed to control the power sequencing of multiple ICs on the board. The board has been working properly for about 4 months and went thru multiple power cycle during this period. However, it was observed that the board is no longer functioning out of sudden. After investigation, apparently the UCD90120A is faulty where the part is now back to the default configuration for some reason. Once we reprogrammed the UCD90120A, the board recovers. My questions are 1) What could possibly cause this problem? 2) Is it possible the internal flash got corrupted and therefore it is back to default configuration? 3) How do we know for sure the flash got corrupted before? 4) Is this a common or known issue? Is there any way to prevent this from happening again?", + "partNumber" : " UCD90120A", + "allResponseList" : [ { + "contentId" : "3306158", + "userName" : "yihe", + "rankPoints" : "23920", + "rankName" : "Mastermind", + "date" : "Apr 3, 2020 2:35 PM", + "userId" : "303879", + "content" : "Hello Could you please share your schematics and project configuration file so that we can review? if you have concerns to share on the E2E forum, you can ask yourcompany representative to forward. Thanks Yihe" + }, { + "contentId" : "3314847", + "userName" : "Faidzul Noor", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 14, 2020 6:45 AM", + "userId" : "4651944", + "content" : "Hi Yihe, We've send the information to thecompany representative to forward to you. Thanks" + }, { + "contentId" : "3315690", + "userName" : "yihe", + "rankPoints" : "23920", + "rankName" : "Mastermind", + "date" : "Apr 14, 2020 5:43 PM", + "userId" : "303879", + "content" : "Hi Thank you for the updates. Once receiving the materials, we will review and update you. Regards Yihe" + }, { + "contentId" : "3320599", + "userName" : "Faidzul Noor", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 1:34 AM", + "userId" : "4651944", + "content" : "Hi Yihe, Any update on this? Hope to hear from you soon. Regards, Faidzul" + }, { + "contentId" : "3321284", + "userName" : "yihe", + "rankPoints" : "23920", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 2:02 PM", + "userId" : "303879", + "content" : "Hello We have updated ourcompany reprehensive and he will forward the responses. Regards Yihe" + }, { + "contentId" : "3327103", + "userName" : "Stephen Bennett1", + "rankPoints" : "10", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 2:15 PM", + "userId" : "6013472", + "content" : "Are there any general technical details around this issue/resolution that can be shared? Thanks, Stephen" + }, { + "contentId" : "3329112", + "userName" : "yihe", + "rankPoints" : "23920", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 4:14 PM", + "userId" : "303879", + "content" : "Hi A brownout circuit described in the datasheet will solve this issue. Regards Yihe" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCD90120A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/894136.json b/data/json/DLP/894136.json new file mode 100644 index 0000000000000000000000000000000000000000..878c2f10d3e93fcfded7a6551cf352fbe1feb3cc --- /dev/null +++ b/data/json/DLP/894136.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "894136", + "reporterName" : "Klaus Moelholm65", + "rankPoints" : "130", + "resolutionStatus" : "", + "ticketName" : "LM5155: Increasing the current capability of LM5155EVM-SEPIC design to 5A", + "rankName" : "Prodigy", + "replies" : " 15", + "views" : " 88", + "queryText" : "Part Number: LM5155 Hi I have modified a LM5155EVM-SEPIC evaluation module to 5V output voltage by changing R9 (Rfbt) to 18.7 kOhm and that works just fine with up to 2A output current with an input voltage between 3.6 and 36V. But in my application we need 5A output current, so my question is what other changes I will need to make to the schematic to achieve the following specifications: Input voltage: 3.6 to 36V Output voltage: 5V Output current: 0 to 5A Input current: 0 to 5A, since the input current is also limited to 5A the maximum output current will not be 5A all the way down to 3.6V, Ambient temperature: The board will be mounted inside a box with no air flow and the temperature inside the box is estimated to be up to about 83C and down do -40C. The building height should be kept below 4mm where possible, and the absolute max building height is 8 mm. If You could help with the needed changes and possible added components, it would be big help. Best regards Klaus", + "partNumber" : " LM5155", + "allResponseList" : [ { + "contentId" : "3305868", + "userName" : "Klaus Moelholm65", + "rankPoints" : "130", + "rankName" : "Prodigy", + "date" : "Apr 3, 2020 8:15 AM", + "userId" : "4608119", + "content" : "LM5155 Test and Calculations (1).xlsx" + }, { + "contentId" : "3306457", + "userName" : "Garrett Roecker", + "rankPoints" : "18240", + "rankName" : "Mastermind", + "date" : "Apr 3, 2020 7:39 PM", + "userId" : "3456925", + "content" : "Hi Klaus, Thank you for reaching out and for considering the LM5155 in your design. Just to clarify do you want theLM5155 to switch at 2.2MHz or another frequency? Thanks, Garrett" + }, { + "contentId" : "3306952", + "userName" : "Klaus Moelholm65", + "rankPoints" : "130", + "rankName" : "Prodigy", + "date" : "Apr 5, 2020 3:52 PM", + "userId" : "4608119", + "content" : "Hi Garret I have no preferred switching frequency, but I do have a wish for small area, building height below 4mm or 8mm where 4mm is not possible and a wish for high efficiency. Best regrads Klaus Moelholm" + }, { + "contentId" : "3306953", + "userName" : "Klaus Moelholm65", + "rankPoints" : "130", + "rankName" : "Prodigy", + "date" : "Apr 5, 2020 3:54 PM", + "userId" : "4608119", + "content" : "Hi again I forgot I also prefer to keep the switching frequency above the hearable frequency range. Best regards Klaus Moelholm" + }, { + "contentId" : "3309342", + "userName" : "Garrett Roecker", + "rankPoints" : "18240", + "rankName" : "Mastermind", + "date" : "Apr 7, 2020 5:34 PM", + "userId" : "3456925", + "content" : "Hi Klaus, I suggest taking a look a this application note, as it will help you calculate the power train components for a SEPIC converter. I thinking based on the size and efficiency requirement I would set the switching frequency in the 300kHz to 500kHz range. This frequency range should result in a good trade off between efficiency and size. Once the calculations have been completed and the magnetic selected I can help refine the design. thanks, Garrett" + }, { + "contentId" : "3310525", + "userName" : "Klaus Moelholm65", + "rankPoints" : "130", + "rankName" : "Prodigy", + "date" : "Apr 8, 2020 3:55 PM", + "userId" : "4608119", + "content" : "Hi Garrett I begun calculating the components as described in the application not, but when got to selecting the coupled inductor, I was unable to find a suitable part that was low enough and at the same time with low enough losses. I used Mouser to find a component but without success. DLM5155 Test and Calculations (2).xlsxo You have other ideas where to find better coupled inductors? I will try again after easter. Happy Easter Klaus" + }, { + "contentId" : "3310813", + "userName" : "Garrett Roecker", + "rankPoints" : "18240", + "rankName" : "Mastermind", + "date" : "Apr 8, 2020 8:42 PM", + "userId" : "3456925", + "content" : "Klaus, I will have to look for some coupled inductors that match the application. There should be a component that requirement There are a few other options 1. Use two discrete inductors. There will be a slightly negative impact on efficiency but this is an option. 2. The LM5176 might be a viable second option if the correct magnetic cannot be found. Thanks, Garrett" + }, { + "contentId" : "3315311", + "userName" : "Klaus Moelholm65", + "rankPoints" : "130", + "rankName" : "Prodigy", + "date" : "Apr 14, 2020 2:10 PM", + "userId" : "4608119", + "content" : "Actually I think I like the LM5176 solution better because it looks like it will have a higher efficiency. I will need to have a bias generator also be be able to run from 3.6V but that would be ok. I have looked at a similar solution with LT8705 and LTC3114. I tried to build and simulate a LM5176 design in WEBENCH POWER DESIGNER but I ran into the following problems: It look like it is not possible make a design with external bias supply, so I can only make a design that goes down to 4.2V. When I try to simulate this design it looks like it is unstable even though the phase margin looks ok. I don't know if it is the simulator that fails or if it is actually the design that is bad.WBDesign46_Input Transient-7.pdf" + }, { + "contentId" : "3317198", + "userName" : "Garrett Roecker", + "rankPoints" : "18240", + "rankName" : "Mastermind", + "date" : "Apr 15, 2020 7:53 PM", + "userId" : "3456925", + "content" : "Hi Klaus, For coming up with component value it is suggested to look at the following excel based calculator. /lit/zip/snvc208 For your application, does the device need to start-up when the input voltage is 3.6V or does it just need to operate down to 3.6V during an input voltage transient? This will determine the best biasing solution for the LM5176 moving forward. -Garrett" + }, { + "contentId" : "3318082", + "userName" : "Klaus Moelholm65", + "rankPoints" : "130", + "rankName" : "Prodigy", + "date" : "Apr 16, 2020 2:11 PM", + "userId" : "4608119", + "content" : "I tried the excel calculator and it seems like it is able to generate a stable design. Please see the attached sheets. It does have the same limitation that it is not possible to use external bias, but it allows \"simulation\" down below 3V, so it look usable. The device need to start up from 3.6V. The design needs to be fully operational from 3.6V except the input current is limited to 5A. Humming Fish.7z" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM5155", "/support/power-management/f/196/tags/LM5155EVM_2D00_SEPIC" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/894164.json b/data/json/DLP/894164.json new file mode 100644 index 0000000000000000000000000000000000000000..f26df9351075d2b4fd9aa426e859a791baf81e81 --- /dev/null +++ b/data/json/DLP/894164.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "894164", + "reporterName" : "K. Sasaki14", + "rankPoints" : "10080", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ25713: 1 cell buck charger with boost operation", + "rankName" : "Guru", + "replies" : " 5", + "views" : " 44", + "queryText" : "Part Number: BQ25713 We are looking for Li-ion 1 cell buck charger with boost operation. Vin: USB 5V VCHG: programable, typ 4.2V ICHG: up to about 5A Boost operation: 12Vout, 2.3A from battery power I think bq25713 can meet these requirement, is this right? Please let me know if you have any other devices. If bq25713 is best device, can we use bq25713 with 2 switch circuit? In this use case, bq27513 is used only as buck charger and boost converter. So I think Q3 and Q4 is not needed. Best Regards, Kohei Sasaki", + "partNumber" : " BQ25713", + "allResponseList" : [ { + "contentId" : "3307884", + "userName" : "Tiger Zhou", + "rankPoints" : "610", + "rankName" : "Prodigy", + "date" : "Apr 6, 2020 4:45 PM", + "userId" : "1451791", + "content" : "Hi, Kohei, That is right. BQ25713 is our latest device in the switch-mode buck-boost charger family, however, BQ25713 does not support 2-switch buck-only circuit. Regards, Tiger Please click \"This resolved my issue\" button if this post answers your question." + }, { + "contentId" : "3308297", + "userName" : "K. Sasaki14", + "rankPoints" : "10080", + "rankName" : "Guru", + "date" : "Apr 7, 2020 12:51 AM", + "userId" : "618616", + "content" : "Tiger-san, OK, I understand. Doesn't bq25713 support 2-switch buck circuit because it has not been verified? Do you have no other optimal device? Best Regards, Kohei Sasaki" + }, { + "contentId" : "3309134", + "userName" : "Tiger Zhou", + "rankPoints" : "610", + "rankName" : "Prodigy", + "date" : "Apr 7, 2020 3:22 PM", + "userId" : "1451791", + "content" : "Please take a look at our newly released BQ24800 for your application." + }, { + "contentId" : "3322192", + "userName" : "K. Sasaki14", + "rankPoints" : "10080", + "rankName" : "Guru", + "date" : "Apr 21, 2020 2:12 AM", + "userId" : "618616", + "content" : "Tiger-san, Thank you for your reply. I could checked bq24800 datasheet. Is there any other internal FET version device of bq24800? And furthermore, 5V output is required in battery only boost mode. I think bq24800 cannot out 5V in battery only boost mode. Best Regards, Kohei Sasaki" + }, { + "contentId" : "3325011", + "userName" : "Tiger Zhou", + "rankPoints" : "610", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 12:10 AM", + "userId" : "1451791", + "content" : "I don't have other suggestions." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25713" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/894250.json b/data/json/DLP/894250.json new file mode 100644 index 0000000000000000000000000000000000000000..4f3fb22d0d486409c0015fda09e45acc8876697b --- /dev/null +++ b/data/json/DLP/894250.json @@ -0,0 +1,79 @@ +{ + "ticketNumber" : "894250", + "reporterName" : "Cedrick Jimenez", + "rankPoints" : "1675", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS7A4501-SP: Current Limit Response.", + "rankName" : "Intellectual", + "replies" : " 8", + "views" : " 51", + "queryText" : "Part Number: TPS7A4501-SP Hi, Good day. Our customer wants to know if we have an information about the response speed of the current limiter of TPS7A4501-SP. I would appreciate if you can share this information with us. Thank you. Regards, Cedrick", + "partNumber" : " TPS7A4501-SP", + "allResponseList" : [ { + "contentId" : "3306505", + "userName" : "Wade Vonbergen", + "rankPoints" : "56470", + "rankName" : "Guru", + "date" : "Apr 3, 2020 8:49 PM", + "userId" : "8007", + "content" : "Cedrick, Let me research this and reply back. Hopefully should have data early next week. Regards, Wade" + }, { + "contentId" : "3307623", + "userName" : "Cedrick Jimenez", + "rankPoints" : "1675", + "rankName" : "Intellectual", + "date" : "Apr 6, 2020 2:00 PM", + "userId" : "5915267", + "content" : "Hello Wade, Thank you for your support. I'll be waiting for the data. Regards, Cedrick" + }, { + "contentId" : "3309218", + "userName" : "Cedrick Jimenez", + "rankPoints" : "1675", + "rankName" : "Intellectual", + "date" : "Apr 7, 2020 4:00 PM", + "userId" : "5915267", + "content" : "Hello Wade, I would like to know if there's an update for this request? Thank you and have a great day. Regards, Cedrick" + }, { + "contentId" : "3310689", + "userName" : "Wade Vonbergen", + "rankPoints" : "56470", + "rankName" : "Guru", + "date" : "Apr 8, 2020 6:03 PM", + "userId" : "8007", + "content" : "Cedrick, I was able to locate some scope shots of the overcurrent response. Unfortunately, the timescale is fairly large 400ms/division. However, the results show that the current hits a peak, then decays slowly to either steady state or thermal trip. The steady decay is due to self heating as most of the power is dissipated across the output transistor. Based on this time scale, I don't see a higher peak other than the initial peak. I will be attempting to get into the lab next week, and I can take some zoomed in shots to verify. The below scope shot is result 12V output with direct short to ground. This plot was taken at cold, and in this case it does not reach thermal limit within scope capture. Let me know if this is sufficient to resolve the question with the customer. Regards, Wade" + }, { + "contentId" : "3321132", + "userName" : "Bart Plovie", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 12:27 PM", + "userId" : "6317468", + "content" : "Thank you for the effort Wade, I understand that it might be difficult to measure things at them moment. (And I'm not in any rush. :) ) Assuming I understood the datasheet correctly, the current limiter isn't tested post-production, which is probably why no specific (range of) numbers are defined for its behaviour? But based on the scope screenshot, it would seem that the spice model is reasonably close to reality, so that's a comfort. I was indeed specifically interested in the section at the start, since I'm trying to work out the current limitation behaviour in slightly more detail. Since there is a current limiter upstream which has a response time of <100 µs, and it would be preferable if the local one activates before the global one in most instances (skimming over a whole list of other reasons). At the same time, I was also somewhat curious about the startup behaviour, simulations seem to indicate that the regulator might go through quite a few on-off cycles around an input voltage of 1.1 V if starting slowly with a large capacitive load. However, since LTspice seems to have some issues with this model, I was wondering if this is normal/expected behaviour or a peculiarity caused by by the way the regulator was modelled. Kind regards, Bart" + }, { + "contentId" : "3323139", + "userName" : "Wade Vonbergen", + "rankPoints" : "56470", + "rankName" : "Guru", + "date" : "Apr 21, 2020 4:28 PM", + "userId" : "8007", + "content" : "Bart, I was able to test 2 different scenarios with 2 significantly different results. Both are supplied with 7V input, and 5V output. The first scenario has the device power up and regulating with no load, then a very low resistive short is applied to the output. The EVM has 22.1uF that is charged up in this configuration. The peak current reached 18.8A in approx 4uS, then dropping back in another 16uS or so. The second configuration is with device input powered, but in shutdown. In this case the output caps are not charged. In this case, the overshoot is very limited, and the device will current limit within 16uS or so with peak at 2.7A. I am not familiar with what you are describing for start up behavior. I can try to duplicate your startup simulation and verify model behavior with pspice. How much capacitive load? What ramp rate for Vin? Shutdown tied to Vin? I am assuming that you are using the unencrypted pspice transient model? Regards, Wade" + }, { + "contentId" : "3323154", + "userName" : "Wade Vonbergen", + "rankPoints" : "56470", + "rankName" : "Guru", + "date" : "Apr 21, 2020 4:42 PM", + "userId" : "8007", + "content" : "Updating to add the graphs that did not make it last time. Test 1 Test 2 Regards, Wade" + }, { + "contentId" : "3326808", + "userName" : "Bart Plovie", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 8:29 AM", + "userId" : "6317468", + "content" : "Hello Wade, Those numbers seem to agree reasonably well with what I see from the simulation. That's one less possible issue to worry about, thank you! But in terms of spice, yes I'm currently using the unencrypted PSpice model. I heavily suspect the source of the problem is a minor non-linearity in the model, hence why I initially asked your colleague if it's possible to acquire a non-encrypted version of the encrypted PSpice model (e.g. under NDA). What I see would be easily explained by there being a threshold somewhere that activates the output, sudden activation would cause the voltage to drop again because of the capacitance, deactivating the regulator. Sadly the issue is a bit capricious to replicate, but an easy way to consistently get it in LTspice is the following setup: R1 N003 N004 2.2k\nR2 N004 0 1k\nXU1 N004 N002 N002 N003 0 TPS7A4501_TRANS\nR4 N004 0 2.37k\nC1 N003 N004 22p Rser=10\nC2 N003 0 22µ Rser=0.08\nC3 N002 0 1µ Rser=0.05\nR77 N002 N001 0.05\nV1 N001 0 PWL(0 0 100m 6.3) Rser=0.1\nR3 N003 0 10\n.tran 0.8\n.lib TPS7A4501_TRANS.LIB\n.backanno\n.end Voltage rise times in the order of 5V/100ms seem to consistently do the trick in fact. This is what it looks like in LTspice: Detail of the problematic activation of the regulator: It's purely the activation of the regulator that seems to be the source of the issue, skipping it by applying a quick voltage rise between 0.9 and 1.2V seems to entirely remove the problem: Best regards, Bart" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS7A4501_2D00_SP" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/894306.json b/data/json/DLP/894306.json new file mode 100644 index 0000000000000000000000000000000000000000..350d389569d1ad091f2ea2feea6fe20d31d450cf --- /dev/null +++ b/data/json/DLP/894306.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "894306", + "reporterName" : "David Lacasse", + "rankPoints" : "440", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS23523: How to invert the PowerGood pins when also using an Oring-FET?", + "rankName" : "Intellectual", + "replies" : " 27", + "views" : " 109", + "queryText" : "Part Number: TPS23523 Hi, we've done a design based on the spec (9.2.2.10 Power Good Interface to Downstream DC/DC) to deactivate the downstream brick of the design. However, we needed to tweak it a bit to get it work because we need to invert the PGb signal. Here is what my design should have : Hotswap GOOD PGb = 0 Brick Enable pin = open Hotswap NOT OK PGb = Open Brick Enable pin = 0 On my design the issue I just found is that the voltage divider at VEE is not working when PGb is floating because VEE became floating also because of the oring-FET! By comparison with the hotswap spec (9.2.2.10 Power Good Interface to Downstream DC/DC) , on my design I also have an o-ringFET on the left…which disconnect VEE so the voltage divider is no longer working between RTN and VEE…My FET is then having 48V at his gate which failed the Vgs spec of 20V and burn it I guess… Does we can use another pin as a references to do that? like Vref or something else? Or any other idea? Thanks for your help! David TPS23523PWT_Nutaq.pdf", + "partNumber" : " TPS23523", + "allResponseList" : [ { + "contentId" : "3306664", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 4, 2020 1:58 AM", + "userId" : "4743883", + "content" : "Hi David, Thanks for reaching out! The circuit mentioned in Section 9.2.2.10 Power Good Interface to Downstream DC/DC of the datasheet should work even if you use ORing-FET. Have you tried that ? Regards, Rakesh" + }, { + "contentId" : "3307445", + "userName" : "David Lacasse", + "rankPoints" : "440", + "rankName" : "Intellectual", + "date" : "Apr 6, 2020 11:11 AM", + "userId" : "3666957", + "content" : "Hi Rakesh, I didn't try the circuit in section 9.2.2.10 because on my side it's preferable that the enable of the brick is floating instead of pullin up. that way when PGb is floating, I need the transistor to be activated to put a 0 and deactivate the Brick instead of a pulldown, like in my schematic added. But by doing that VEE is disconnected to the voltage divider is not working. Does any other pin can serve as a reference instead of VEE? I'm doing some calculation to use exactly like the section 9.2.2.1, but that's tricky as the brick outputs also a voltage on his enable pin when enabled...that's why it's better to make it floating to put it ON. Thanks" + }, { + "contentId" : "3309242", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 7, 2020 4:13 PM", + "userId" : "4743883", + "content" : "Hi David, You can consider using optocoupler as below. When PGb=OPEN, photo-diode conducts to pull down the brick enable pin to LOW. similarly, it eaves the brick enable pin OPEN if PGb=0. Best Regards, Rakesh" + }, { + "contentId" : "3309263", + "userName" : "David Lacasse", + "rankPoints" : "440", + "rankName" : "Intellectual", + "date" : "Apr 7, 2020 4:31 PM", + "userId" : "3666957", + "content" : "Hi Rakesh, thanks for this update. This way seems similar of what I've done in my schematic But on my side I also have an oring FET on the \"left\" of VEE pin, so when PGb is floating, this FET will also be OFF and we will lost again the references of the photo-diode, like I've done in my schematic... If connecting it directly at -48V input, I will lost the oring-fet protection... That's seems difficult to find a solution… Does the gate of the FET can be used as a reference instead? does it keeps it's references to RTN when gates are OFF? Thanks" + }, { + "contentId" : "3309281", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 7, 2020 4:44 PM", + "userId" : "4743883", + "content" : "Hi David, VEE of TPS2352x is the only reference available. Regards, Rakesh" + }, { + "contentId" : "3309294", + "userName" : "David Lacasse", + "rankPoints" : "440", + "rankName" : "Intellectual", + "date" : "Apr 7, 2020 4:53 PM", + "userId" : "3666957", + "content" : "Ok, so what are my other options? I assume that when the oring FET gate and the others FET gates are off, the chip is still alive from RTN and -48V input...so any pin referenced to RTN would work no? I wonder now how the OV and UVEN pins are still working when the oring-FET is deactivated thus losing the VEE connection from -Vin48? Does it takes the references from somewhere else inside the chip? (like Neg48?) If OV and UVEN are still good, I wonder why my schematic is not working unless there is something different internally? Thanks for the clarifications" + }, { + "contentId" : "3309336", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 7, 2020 5:28 PM", + "userId" : "4743883", + "content" : "Hi David, The system will have reference through the body diode of ORing FET to -48V. Regards, Rakesh" + }, { + "contentId" : "3309796", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 8, 2020 2:42 AM", + "userId" : "4743883", + "content" : "Hi David, Can you provide test waveforms of the highlighted nodes with respect to VEE during startup. The drain potential of the hot-swap FET varies during turn-ON and turn-OFF. As you mentioned above, this would be the reason for the FET Q5 damage. Best Regards, Rakesh" + }, { + "contentId" : "3310162", + "userName" : "David Lacasse", + "rankPoints" : "440", + "rankName" : "Intellectual", + "date" : "Apr 8, 2020 10:39 AM", + "userId" : "3666957", + "content" : "Hi Rakesh, you mean having the GND of the oscilloscope probe on VEE on the bottom or on the -48V input before the oring FET on the left? (not in the picture) I will try it at VEE. Regards," + }, { + "contentId" : "3310248", + "userName" : "David Lacasse", + "rankPoints" : "440", + "rankName" : "Intellectual", + "date" : "Apr 8, 2020 12:28 PM", + "userId" : "3666957", + "content" : "Hi Rakesh, I've taken multiple screenshots, and it seems that the bug comes from the gate that is referenced to VEE, and the Source at -Vout. I wonder if it would be better to reference the voltage divider of the gate to -Vout instead of VEE? like the Source pin? Thanks for your input RTN is following always the input supply, even if the voltage is below the threshold UVEN. OringFET never turn OFF?" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS23523" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/894352.json b/data/json/DLP/894352.json new file mode 100644 index 0000000000000000000000000000000000000000..421d88fd98ceff305b7d0c0cbb90d39a8680fd29 --- /dev/null +++ b/data/json/DLP/894352.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "894352", + "reporterName" : "Rohit Kadecha", + "rankPoints" : "440", + "resolutionStatus" : "", + "ticketName" : "BQ76930: i ordered samples for Bq7693002dbt", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 30", + "queryText" : "Part Number: BQ76930 As per datasheet Bq7693002dbt crc is disabled , but when i recieved samples it was mentioned that crc is enabled , y it is so ? What to order to have crc disabled 2- differen parts? Rohit", + "partNumber" : " BQ76930", + "allResponseList" : [ { + "contentId" : "3307449", + "userName" : "David Hien", + "rankPoints" : "8175", + "rankName" : "Expert", + "date" : "Apr 6, 2020 11:20 AM", + "userId" : "1054107", + "content" : "Hi Rohit, You read the datasheet correctly: bq7693002DBT does have CRC disabled. Where was it mentioned that CRC is enabled?" + }, { + "contentId" : "3323757", + "userName" : "Rohit Kadecha", + "rankPoints" : "440", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 4:12 AM", + "userId" : "6003292", + "content" : "Yes correct it is written as crc is disabled in datasheet , but upon reciept of samples a covering Invoice letter says that crc is enabled for supplied part. Why is it so? Rohit" + }, { + "contentId" : "3324121", + "userName" : "David Hien", + "rankPoints" : "8175", + "rankName" : "Expert", + "date" : "Apr 22, 2020 11:18 AM", + "userId" : "1054107", + "content" : "Hi Rohit, I will look into why your invoice was showing the wrong parameter and if it was a lone case. I however feel better now that I know you did indeed receive the parts you ordered! Thank you for your interest in BQ76930!" + } ], + "tags" : [ "/support/power-management/f/196/tags/crc%2bdisabled%2bbq7693002dbt%2bor%2bother", "/support/power-management/f/196/tags/BQ76930" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/894554.json b/data/json/DLP/894554.json new file mode 100644 index 0000000000000000000000000000000000000000..a883572c5884412458707e0b241814526e432539 --- /dev/null +++ b/data/json/DLP/894554.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "894554", + "reporterName" : "user6013621", + "rankPoints" : "70", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ40Z80: the learning cycle fail.", + "rankName" : "Prodigy", + "replies" : " 12", + "views" : " 65", + "queryText" : "Part Number: BQ40Z80 hello, i made the battery packs, 6S2P and 6S4P Lipo battery pack. and i have done learning cycle. 6S2P was done well. but 6S4P isn't done. (Norminal Vol : 21.6, Capacity : 13,400mAh) my learning cylce step below. 1. Check and write proper value of Register, Chem, Calibration. 2. After Checking, Set Gauge_EN and RDIS and Clear VOK. 3. After step 2, fully discharging battery pack. 4. Take a rest time, 5 hours (the Rest flag should be set) 5. after rest ttme, fully charge battery pack. at that time, Lstatus : 0x04. 6. Take a rest time, 2 hours in this step, Lstatus should be 0x05. but my 6S4P Pack's Lstatus is 0x06. what is wrong my steps? ref > How to Complete a Successful Learning Cycle for the bq40z80", + "partNumber" : " BQ40Z80", + "allResponseList" : [ { + "contentId" : "3307770", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 6, 2020 3:29 PM", + "userId" : "1864278", + "content" : "Can you provide a bqStudio log file for your learning cycle so that I can check if there was something wrong with your learning cycle? Also, make sure your chemistry id is proper and discharge the battery cell to the minimum voltage of the battery as specified in the manufacturer’s data sheet. Andy" + }, { + "contentId" : "3309684", + "userName" : "user6013621", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 8, 2020 12:12 AM", + "userId" : "6013621", + "content" : "Thank you for reply. this is my log file. please check detached file.200407_LearningCycle_CHG.xlsx" + }, { + "contentId" : "3310861", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 8, 2020 9:28 PM", + "userId" : "1864278", + "content" : "I have checked your log file and I cannot tell whether the battery cells were discharged to empty and relaxed. Do you have a continuous bqStudio log for your entire learning cycle? Andy" + }, { + "contentId" : "3310951", + "userName" : "user6013621", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 9, 2020 12:17 AM", + "userId" : "6013621", + "content" : "Dear Andy. hello, you mean if there are somthings wrong, example Lstatus 0x06 at Charging step, i will continue learning cycle? i stop the learning cylce when there are somethings wrong. Unfortunately, there are almost same. after charging and taking the rest time, the Lstatus is 0x06. so, if i ignore it, i can log the whole learning cycle. please wait a few day. i will log whole cycle. thank you" + }, { + "contentId" : "3312018", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 9, 2020 9:12 PM", + "userId" : "1864278", + "content" : "If the LStauts() is already 0x06, it means a QMax update and resistance update are both done. I would suggest you run the learning cycle again so that the LStatus() changes to 14 (0x0E). You can find these details in the app note you already have." + }, { + "contentId" : "3312408", + "userName" : "user6013621", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 10, 2020 8:40 AM", + "userId" : "6013621", + "content" : "Dear Andy i got it. but i don't understand. i know that Lstatus = 0x05 -> first Qmax update occur i think Lstatus should be 0x05 at first charging step. so i changed the Qmax cycle to 0, when learning cycle failed. once i follow your idea that don't care about 0x05. thank you" + }, { + "contentId" : "3314128", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 13, 2020 6:00 PM", + "userId" : "1864278", + "content" : "As I mentioned before, I don't have your continuous bqStudio log so I cannot tell what happened to your learning cycle. If the LStatus() was only updated by the gauge itself and you never updated the LStatus manually, your learning cycle seems done since the LStatus() is already 0x06. I would suggest you run the learning cycle again to see whether the LStatus() can change to 14 (0x0E)." + }, { + "contentId" : "3314491", + "userName" : "user6013621", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 14, 2020 12:11 AM", + "userId" : "6013621", + "content" : "i got what you mean. i think it maybe mix two battery pack(6S2P and 6S4P). how i can reset the learning cycle done? are there any way to reset learning cycle? thank you, Andy." + }, { + "contentId" : "3315997", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 14, 2020 11:38 PM", + "userId" : "1864278", + "content" : "I would suggest you dump a srec file before you start the learning cycle next time. If you want to redo the learning cycle, just program the srec file to bq40z80. I guess you probably have not done it yet. I would suggest you program the default srec file to bq40z80, have the necessary settings configured (e.g. chemistry id) and then do the learning cycle again. Andy" + }, { + "contentId" : "3320619", + "userName" : "user6013621", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 2:10 AM", + "userId" : "6013621", + "content" : "Dear Andy i am doing new learning cycle. after downloading default firmware, i am followed the reference step. but, it doesn't work. at this challenge, i have some questions. 1. after downloading default firmware, the 'Full charge capacity' didn't match. So, i have to change some register. a. setting -> SOC Flag Config B : 0x99 : default setting make me can't charge my battery pack. because it isn't matched to set FC flag. So, i change the standard of FC set to Voltage level, not percentage. b. protection -> OC : Threshold : 10000mAh : default setting make me can't charge. after a little while of charging, OC Flag should set. because of capacity. 2. after changing some parameter, i was doing learning cycle. but, in step 3, REST and VOK never clear. i don't know why. could you tell me the way how i match the capacity? thank you Best Regard" + } ], + "tags" : [ "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2bBQ40Z80", "/support/power-management/f/196/tags/bq40z80" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/894562.json b/data/json/DLP/894562.json new file mode 100644 index 0000000000000000000000000000000000000000..619acf9817499574648786d440ad22bf62a144f5 --- /dev/null +++ b/data/json/DLP/894562.json @@ -0,0 +1,71 @@ +{ + "ticketNumber" : "894562", + "reporterName" : "Rohit R", + "rankPoints" : "30", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "AWR1843: Is there a possibility of BPM transmission for 3Txs", + "rankName" : "Prodigy", + "replies" : " 7", + "views" : " 174", + "queryText" : "Part Number: AWR1843 Hi, I am using AWR1843 (mmWave Studio 2.0.0.2 and sdk_02_01_00_04), with which I have a couple of questions to be asked. 1. Is there a possibility for simultaneous transmission of 3 Txs (in BPM mode) and how can it be done? 2. Making use of 3 Txs, can I make use of a configuration as follows: BPM mode for Tx1 and Tx2, in order to obtain Azimutal information. i.e., Tx1 and Tx2 with 0 phase, then Tx1 and Tx2 with 180 phase and later make use of Tx3 alone for elevation purpose. Regards, Rohit", + "partNumber" : " AWR1843", + "allResponseList" : [ { + "contentId" : "3307520", + "userName" : "Jitendra Gupta", + "rankPoints" : "33995", + "rankName" : "Mastermind", + "date" : "Apr 6, 2020 12:46 PM", + "userId" : "1717369", + "content" : "Hello Rohit, 1. Yes. You can use all three Tx at a time. You need to select all the tx for select chirp in rlSetChirpConfig API and set the required BPM. 2. Requested feature set is possible to configure AWR1843 device where each chirp index you need to set with the selected Tx phase. You can refer MRR ver2.0 which has feature of beam forming where it uses similar features. Regards, Jitendra" + }, { + "contentId" : "3309928", + "userName" : "Rohit R", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 8, 2020 6:05 AM", + "userId" : "5164019", + "content" : "Hello Jitendra, Thanks a lot for the inputs. Well, I have tried the 3Txs in BPM mode (for each chirp having 64 samples) and was able to collect the data with the help of DCA1000. But, I wanted to confirm the way that it is done. I have set the BPM config tab in such way that I transmit T1+T2+T3 in 1st chirp, then T1-T2+T3 in 2nd chirp and T1+T2-T3 in 3rd chirp. For 1st chirp transmission, I SET the start & end chirp to 0 in sensor config tab and jumped to bpm config tab. I had start and end index as 0(by default) and set the TX Off and TX On for ALL the Txs to be 0. Then, clicked on SET and ACTIVATE. For 2nd chirp transmission, I SET the start and end chirp to 1 in sensor config tab, and came to the bpm config tab. I have the following picture attached. I found the Start and End index to be changed by itself to 511. I made changes only with the TX Off, TX ON for ALL Txs as follows. Then, clicked SET and ACTIVATE. For 3rd chirp transmission, I SET the start and end chirp to 2 in sensor config tab, and came to the bpm config tab. I have the following picture attached. I found the Start and End index to be same as previous by itself. I made changes only with the TX Off, TX ON for ALL Txs as follows. Then, clicked SET and ACTIVATE. Doing the further steps in Sensor config, I was able to collect the data. My questions are: 1. What's the importance of Start and End Index in BPM config tab, how do I make use of it? 2. Is the phase part done correctly as per the configuration that I wanted i.e., wrt to TX Off and TX ON? 3. After I click ACTIVATE, I find the tool to be in \"Not Responding\" state for sometime. Does it happen that way or have I missed anything to change? 4. How can I confirm that the hardware is transmitting in BPM? Regards, Rohit" + }, { + "contentId" : "3316380", + "userName" : "Ishita Kochar", + "rankPoints" : "1000", + "rankName" : "Intellectual", + "date" : "Apr 15, 2020 8:09 AM", + "userId" : "6095493", + "content" : "Hi Rohit, Thanks for your patience. 1 & 2. The start index and the end index have the same meaning as in the \"SensorConfig\" tab. You can configure different BPM values for each of the chirps or a set of chirps using the \"start\" and \"end\" index entry. For this, you have to manually set that value according to your configuration. The default values are just a limit for your programmed configuration. 3. You can press “Set” for sending one set of chirp start index and end index along with its info present in the GUI. Then you can do “Activate” for sending all the configured sets of chirp start index and end index along with its info at one shot. It takes a little while to send this configuration to the device. 4. You can confirm that from the post proccesing plots of the mmWave studio. The \"Phase Stability across chirps\" plot shows you the correlation for each chirp, and to verify, you can use one Tx per chirp Regards, Ishita" + }, { + "contentId" : "3324371", + "userName" : "Rohit R", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 2:11 PM", + "userId" : "5164019", + "content" : "Hello Ishita, I appreciate your inputs, they were very informative. Just had one more thing to get it clarified regarding the BPM Compensation (decoding part). Currently, I am making use of the ADC data for my algorithm. So, do I have to make use of BPM compensation in my Pre-processing algo or is the BPM compensation already done in the H/w or mmWave tool. Because, by observing the data I find that they have already been compensated in the H/w or tool. It would be helpful if you could confirm me on the same. Regards, Rohit" + }, { + "contentId" : "3324733", + "userName" : "Ishita Kochar", + "rankPoints" : "1000", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 5:39 PM", + "userId" : "6095493", + "content" : "Hi Rohit, Raw ADC is sent from device with the Phase rotation (BPM). So you should be able see each successive chirp with the programmed phase. Say for example, if you've programmed the BPM code to be alternate for each chirp (i.e 10101010), you will see the next chirp 180 degrees rotated and so on. Regards, Ishita" + }, { + "contentId" : "3326751", + "userName" : "praveen mogre", + "rankPoints" : "10", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 7:15 AM", + "userId" : "6331763", + "content" : "Hello Ishita, Thank you for your response. we were using the AWR1642 EVM in BPM mode, but I missed the following points. Our understanding was that in first chirp TxA will be “0”, TxB will be “0” and in second chirp TxA will be “0” and TxB will be “1”. So we did using bpmCfg 0 0 0 1 in the Config file. We didn’t check \" \" in MmwDemo_CLIBpmCfg. So according to the config we have disabled the BPM, so we didn’t see much change in output, now we shifted to AWR1843. In AWR1843 EVM we are having 3 Tx that are to be working together. Now once we started doing change to cli.c file in MSS we came across the mistake. So we added another field chirp2Idx \" \" But when we collected the BPM data we followed the pattern as described in above conversation i.e chirp1: 000 (TxA+TxB+TxC), chirp2: 010 (TxA-TxB+TxC), chirp3: 001 (TxA+TxB-Txc). My question is how to configure the hardware in CCS and what could be appropriate command line that can e used. Currently I have added bpmCfg -1 1 0 0 0 and the system is running like it was working for TDM mode. I am sure this is not the correct way. Regards Praveen Mogre" + }, { + "contentId" : "3326923", + "userName" : "Jitendra Gupta", + "rankPoints" : "33995", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 10:59 AM", + "userId" : "1717369", + "content" : "Hello Praveen, If you trying xWR18xx mmw demo then it doesn't support BPM feature in this application. You need to modify the application for BPM support. You can take reference from xWR16xx mmw demo for BPM implementation but that has BPM for two Tx only. Regards, Jitendra" + } ], + "tags" : [ "/support/sensors/f/1023/tags/AWR1843" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/894596.json b/data/json/DLP/894596.json new file mode 100644 index 0000000000000000000000000000000000000000..706b966859301279d762120f5bbd7f5edc379a84 --- /dev/null +++ b/data/json/DLP/894596.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "894596", + "reporterName" : "Kazuhiko Hirano", + "rankPoints" : "4565", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS22920: TINA transient analysis", + "rankName" : "Expert", + "replies" : " 4", + "views" : " 52", + "queryText" : "Part Number: TPS22920 Hello, My customer is facing a couple of issues at TINA transient analysis as follows. At TPS22920_old_sch.tsc, VIN oscillates as framed with RED circle.What’s wrong? TPS22920_old_sch.tsc And at TPS22920_new_sch.tsc, my customer gets the following error when load R2>5ohms. What’s wrong? TPS22920_new_sch.tsc Best regards, K.Hirano", + "partNumber" : " TPS22920", + "allResponseList" : [ { + "contentId" : "3308296", + "userName" : "Andy Robles", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 7, 2020 12:50 AM", + "userId" : "6043129", + "content" : "Hi Hirano, Welcome to E2E! In the old schematic one mistake I see is that they have VIN connected directly to the ON pin of the device. I attached an RC delay to the old schematic an acquired the following behavior. For new schematic follow these steps: 1. On the Analysis tab go to Set Analysis Parameter 2. On the bottom right corner click on the hand and select open. 3. Find the Transient Convergence Solutions.PRM file and open. 4. Select okay. Analysis should be able to run. Let me know if you have any questions. Best regards, Andy Robles" + }, { + "contentId" : "3310066", + "userName" : "Kazuhiko Hirano", + "rankPoints" : "4565", + "rankName" : "Expert", + "date" : "Apr 8, 2020 8:54 AM", + "userId" : "711092", + "content" : "Andy, Thank you for your responses. My customer was able to solve the issues, but still has a new question. At the TPS22920_new_sch_1st.tsc, my customer deleted U2 once and then undo it, TPS22920_new_sch_2nd.tsc. Then he got an error as follows. He just delete U2 and undo it, so the two .tsc files should be identical. Why he got the error? What’s wrong?TPS22920_new_sch_1st.tsc TPS22920_new_sch_2nd.TSC Best regards, K.Hirano" + }, { + "contentId" : "3313047", + "userName" : "Andy Robles", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 12, 2020 3:43 AM", + "userId" : "6043129", + "content" : "Hi Hirano, When the component was deleted something within the code must have changed, and when they undid the deletion the code might've not updated the same way. Did the customer do anything else after they deleted the component? When I open the file that works and try to recreate what the customer did I do not get the same error that the customer is seeing. In my case when I undo the deletion the simulation still works fine. I only see the error when I open the second model attached, so there has to be something different within the codes of the simulations. Since the first simulation still works fine I would discard the second simulation and continue tests on the first file. Best regards, Andy Robles" + }, { + "contentId" : "3326028", + "userName" : "Ian Williams", + "rankPoints" : "27030", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 5:14 PM", + "userId" : "1338456", + "content" : "Hi Hirano, Andy, I have seen this before. This is caused by the \"Post-processor\" tool. When you deleted and re-added the component, the post-processor lost its reference to the nodes of that component. You can fix this by deleting all curves from the Post-processor window and then re-running the simulation. I did this on the attached file and the error goes away. Unfortunately you will have to set up any post-processed curves again. TPS22920_new_sch_1st_fixed.TSC Best regards, Ian Williams Applications Manager Current Sensing" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS22920" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/894616.json b/data/json/DLP/894616.json new file mode 100644 index 0000000000000000000000000000000000000000..280ab688b004990087d78fecdfce3b4583f1363f --- /dev/null +++ b/data/json/DLP/894616.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "894616", + "reporterName" : "Bilgin Per", + "rankPoints" : "140", + "resolutionStatus" : "Resolved", + "ticketName" : "UCC28950: UCC28950 TINAcompany Steady State Reference Design Simulation", + "rankName" : "Prodigy", + "replies" : " 12", + "views" : " 91", + "queryText" : "Part Number: UCC28950 Hello Dear Experts, I am working on UCC28950 Steady State Reference Desing simulation and I try to simulate my 2kW dc dc converter design using this reference design simulation. Here I have a question about UCC28950 Steady State Reference Desing . - In the output of dc dc converter, there are output inductor(Lout) and capacitors(Cout). These capacitors and inductor have IC value . For example , (Lout= 2U DCR=0.75M IC=20) -What is the IC ? -What is the importance of IC value for bobin and capacitors? I attached below related circuit picture from UCC28950 Steady State Reference Desing simulation circuit.", + "partNumber" : " UCC28950", + "allResponseList" : [ { + "contentId" : "3307465", + "userName" : "Colin Gillmor", + "rankPoints" : "22565", + "rankName" : "Mastermind", + "date" : "Apr 6, 2020 11:47 AM", + "userId" : "1139376", + "content" : "Hello Bilgin In this context 'IC' means Initial Condition. This is the value that the simulator assigns to the component at the beginning of the simulation. It means that the simulation gets close to its steady state condition more quickly than it would if the initial condition were set to zero. Normally one would set the IC for the capacitor to be the regulated output voltage and the IC for the inductor to be the load current. Regards Colin" + }, { + "contentId" : "3308897", + "userName" : "Bilgin Per", + "rankPoints" : "140", + "rankName" : "Prodigy", + "date" : "Apr 7, 2020 1:06 PM", + "userId" : "6217383", + "content" : "Hello Colin Thanks for your reply. For example , in my 2kW dc-dc converter design at full load output is 32V ,62 A. -In this case my Cout capacitor has IC=32 , at full load my Lout bobin has IC=62 . Is it OK? Also,when I simulate the transformer in steady state solver , this simulation results are changes and results(Vout,Iload) nearly equals to zero. I know UCC28950 model is transient model and it can be simulated in transient mode but, I have a question. - How can I simulate this circuit correctly in steady state solver or steady - state mode? Thanks." + }, { + "contentId" : "3308920", + "userName" : "Colin Gillmor", + "rankPoints" : "22565", + "rankName" : "Mastermind", + "date" : "Apr 7, 2020 1:22 PM", + "userId" : "1139376", + "content" : "Hi Bilgin Your IC values are correct - I'm not sure what you mean about simulating the transformer - can you post your sim file here and I'll have a look at it. Regards Colin" + }, { + "contentId" : "3308986", + "userName" : "Bilgin Per", + "rankPoints" : "140", + "rankName" : "Prodigy", + "date" : "Apr 7, 2020 2:03 PM", + "userId" : "6217383", + "content" : "Hi Colin I wrote 'transformer' by mistake . I wanted to write \"Circuit\" instead of 'transformer'. Sorry . I am working on PMP8740 reference desing dc-dc converter circuit. I want to simulate this circuit and understand working principle. I used almost the same values in PMP8740 dc-dc converter circuit schematic except for voltage and current loop . Also, Using this simulation I want to learn full bridge main transformer technical specs. Now, in simulation output voltage about 24 volt and output current is about 44 amper at full load. But my expectation is 32V and 60A at full load. What is this circuit problem I don't know. I attached my simulation file. Please can you help me ? Thanks.2kW dc-dc converter.TSC" + }, { + "contentId" : "3311459", + "userName" : "Colin Gillmor", + "rankPoints" : "22565", + "rankName" : "Mastermind", + "date" : "Apr 9, 2020 1:00 PM", + "userId" : "1139376", + "content" : "HI Bilgin I've been able to run your sim file and it looks like the controller is running in current limit. COMP is high which is due to the output voltage not being at the set point. I reduced the CT burden resistor form 22R to 11R and the output voltage increased significantly but only to about 28V. (I changed the reset resistor (R2) from 4.8k to 1k too. I'll continue to work on this but it's slow because I can't spend 100% of my time on it. The basic message is that this sim can be made to work, we just need to do a bit more debug on it. Regards Colin" + }, { + "contentId" : "3312330", + "userName" : "Bilgin Per", + "rankPoints" : "140", + "rankName" : "Prodigy", + "date" : "Apr 10, 2020 6:45 AM", + "userId" : "6217383", + "content" : "Hi Colin Thanks a lot for your help . I understood the problem . I changed the resistor values and I saw the your results.(Vout=28V approx , I load= 53A approx) I am also working on simulation. If I get important changes in results , I will get back to you." + }, { + "contentId" : "3312478", + "userName" : "Colin Gillmor", + "rankPoints" : "22565", + "rankName" : "Mastermind", + "date" : "Apr 10, 2020 10:04 AM", + "userId" : "1139376", + "content" : "Hi Bilgin I noticed that the inductor IC doesn't work - it makes no difference whether you set 60A or 0A. I also think that the loop response is relatively slow so you see some damped oscillations in the output - you may want to look at the sim from 9ms to 10ms rather than 500us to give it time to settle down. I reduced the dead times you were using to the minimum value because the original values were significantly reducing the available duty cycle. Changed R3 from 49.9k to 13k. DELAB time was 1us. Changed R4 from 49.9k to 13k. DELCD time was 1us. Changed R4 from 49.9k to 13k. I increased the input and output capacitances proportionally - this didn't make much if any difference Increased C2_2 from 0.47u to 1.5u Increased C3_2 from 330u to 1000u Reduced R1_2 from 22R to 7R Reduced R2_2 from 4.87k to 700R The system seemed to be locked out at Dmax so i reduced the primary turns from 19 to 17 get more volts on the secondary. This may or may not be needed but it didn't help. The primary leakage inductance should be reduced because the primary current at 1600W is 2.5 times greater than at 600W (EVM) to keep the time needed to reverse the primary current when the primary changes polarity - (dt = l di/V) Changed L2 from 10uH to 1uH and DCR from 0.2 to 0.002 - this helped a little. The IC for the inductor models seems not to work - the workaround is to run the sim for longer Set IC for L2 to 0 For some reason I don't seem to be getting Dmax even although COMP is locked high (at around 4V or so) which would normally generate Dmax. I'm going to look at that now. Regards Colin" + }, { + "contentId" : "3312721", + "userName" : "Colin Gillmor", + "rankPoints" : "22565", + "rankName" : "Mastermind", + "date" : "Apr 10, 2020 4:24 PM", + "userId" : "1139376", + "content" : "Hi Bilgin I checked that the controller model will run from Dmin to Dmax so there should be no reason why it is the cause of the problems. I't suggest that you double check the component values - especially those of Lout and the current transformer burden resistor. You should also look at the values of leakage inductance in both the shim inductor and the transformer primary. The leakage inductance determines how long it takes for the current in the primary to switch direction when the transformer primary polarity changes. No energy is transferred from primary to secondary during this process and it can be a significant part of the duty cycle. You will almost certainly need to run the sim out to 10ms or maybe even longer to allow Vout to settle at its final value - Monday is a public holiday in Ireland - I'll be back at work on Tuesday 14th. Do please let me know how you get on. Regards Colin" + }, { + "contentId" : "3319111", + "userName" : "Bilgin Per", + "rankPoints" : "140", + "rankName" : "Prodigy", + "date" : "Apr 17, 2020 8:02 AM", + "userId" : "6217383", + "content" : "Hi Colin Thanks a lot for your valuable informations. I changed dead times , input and output capacitances and L2 values according to your values . I looked at the sim file 9ms to 10ms time period. Finally , output voltage is between 31.36 V and 31.42 Volt and Load current is between 59.28A and 59.37A. I've been able to run my sim for my desired output voltage and current level. Thanks for your help. As far as I understood , the main problems are in Lout , current burden resistor and both the shim inductor and the transformer primary leakage inductance. In PM8740 dc- dc converter schematic , CT burden resistor is 16,2 ohm and reset resistor is 100k. When I used these values output voltage and load current are significantly reduced. I have question about CT burden resistor and reset resistor . How do you calculate CT burden resistor 7R and reset resistor 700R values? Also , Full bridge transformer and shim inductor are custom design transformers and I have no informations about their leakage inductances. How can I adjust these values ? I attached the my sim file results and pmp8740 dc-dc converter currrent sense transformer circuit below. Thanks. ." + }, { + "contentId" : "3319184", + "userName" : "Colin Gillmor", + "rankPoints" : "22565", + "rankName" : "Mastermind", + "date" : "Apr 17, 2020 9:08 AM", + "userId" : "1139376", + "content" : "Hi Bilgin It's great that you have made some progress. I put in 7R as a burden as a guess to get the sim running and it worked. I'm still trying to figure out a couple of things - and I'll post here later. If you get a chance, can you post your sim file here too so that I can run it for myself. Thanks Colin" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC28950" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/894810.json b/data/json/DLP/894810.json new file mode 100644 index 0000000000000000000000000000000000000000..60644fef47453c42d57376150f5b6effbd497a6a --- /dev/null +++ b/data/json/DLP/894810.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "894810", + "reporterName" : "Kurt Schmidt", + "rankPoints" : "9965", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS65400: Error Amplifier Gain-BW", + "rankName" : "Genius", + "replies" : " 10", + "views" : " 71", + "queryText" : "Part Number: TPS65400 What is the Unity Gain Bandwidth of the internal error amplifiers for this device? The data sheet does not specify. and I suspect we might be BW limiting with higher Rcomp values.", + "partNumber" : " TPS65400", + "allResponseList" : [ { + "contentId" : "3308674", + "userName" : "Zhao Ma", + "rankPoints" : "7070", + "rankName" : "Expert", + "date" : "Apr 7, 2020 9:18 AM", + "userId" : "4727719", + "content" : "Hi, Kurt The internal error amplifier is OTA, the trans-conductance amplifier, the GBW = Gm/Ccomp, it is related with compensation capacitor at COMPx pin. (Its own capacitance at COMPx is very small, it is about 10pF, it can be ignored.)" + }, { + "contentId" : "3308829", + "userName" : "Kurt Schmidt", + "rankPoints" : "9965", + "rankName" : "Genius", + "date" : "Apr 7, 2020 12:19 PM", + "userId" : "748218", + "content" : "Thank you for the rapid response Zhao Ma as I am working a time-critical problem. For that theoretical equation is the result in radians or Hz? And what does it typically measure on a real device? On the actual part I am seeing much less than theoretical even with no Chf cap." + }, { + "contentId" : "3309771", + "userName" : "Zhao Ma", + "rankPoints" : "7070", + "rankName" : "Expert", + "date" : "Apr 8, 2020 2:10 AM", + "userId" : "4727719", + "content" : "Hi, Kurt 1. The unit is radians. 2. Just for OTA itself, usually it is a single pole system, so the GBW=Gm/Cc is to calculate the bandwidth for OTA itself. For the buck converter system, there are other poles and zeros, the bandwidth of converter cannot be calculated by this equation. And you can refer the calculation in page 24 of datasheet: Feedback Compensation. Usually we don't care about the OTA's GBW, we care about the whole system stability, so usually we should measure the Bode plot for the whole buck converter system. 3. What is the \" Chf cap\"?" + }, { + "contentId" : "3311114", + "userName" : "Kurt Schmidt", + "rankPoints" : "9965", + "rankName" : "Genius", + "date" : "Apr 9, 2020 4:39 AM", + "userId" : "748218", + "content" : "Thanks Zhao Ma, This is not my first time working with SMPS stability; I am very familiar with the topic. We measured the loop response of our design and found we couldn't get our desired crossover frequency. When I looked at why, it appeared as if the OTA may have insufficient BW. So I want to verify my hypothesis. To answer your last question, what I call Chf is what figure 17 in the data sheet calls Croll. 2.) GBW for an ideal OTA is Gm/Ccomp but the OTA inside the TPS65400 is not ideal. You said there is about 10pF of stray capacitance on the COMP pin. So using your numbers the GBW should be (120uA/10pF)/(2*pi) = 1.9MHz. But there is no way this OTA has 1.9MHz of bandwidth. I measured the error amplifier response on the EVM (from TP2 to the COMP pin) with the mid-band gain set near 0db (Rc=15.4k and Cc=4700pF) with Croll=0 (not loaded.) I got the response shown below. You can see that with only the 10pF stray on COMP the OTA is already rolling off at 60kHz (-3dB point.) So my original question: what is the GBW of the OTA inside the TPS65400 with 10pF Cc? Or asked a different way, what is Gm(f)? Gm has to have some dependency on frequency. A related question: What is the output resistance (Rea measured from COMP to ground) for the OTA? This will tell me what the open loop gain of the OTA is at DC. The reason this is important is we are using the TPS65400 to develop 1.1V @ 1.5A from a 12V input with very high output capacitance (200-400uF). The switching frequency is 600kHz with a 6.8uH inductor. In this case we need to get more than 20dB of mid-band gain that is flat out to about 150kHz to be able to get the crossover frequency up to 1/10th of Fsw. But it looks like the OTA is running out of BW down near 60kHz. To make matters worse, I can't use the type 3 cap (C1 in figure 17) to counteract the rolloff because the step-down ratio is high. The zero created by C1 is passive so I can't even get 3dB out of it before it flattens out. I have a few other observations and questions but let's start with the OTA BW first. Thank you for as rapid a reply as you can give." + }, { + "contentId" : "3311201", + "userName" : "Zhao Ma", + "rankPoints" : "7070", + "rankName" : "Expert", + "date" : "Apr 9, 2020 6:54 AM", + "userId" : "4727719", + "content" : "Hi, Kurt 1. As i know, there is no limitation for OTA's GBW in TPS65400. Just only for OTA, usually Cstray comes from the parasitic capacitance at output node of OTA, the Cstray is not big, usually it is about 10pF ~ 30pF. The output impedance of OTA (Rea) is usually about 1Meg~30Megohm. Since there are other poles in OTA itself, we cannot use Gm/Cstray to calculate the GBW for OTA itself. We can use this equation to calculate the GBW only for single pole system. 2. What is your configuration when testing Bode plot? did you remove the Ccomp (4.7nF)? From your bode plot, apparently there is a dominant pole in low-band, it looks like you didn't remove the Ccomp, did you? 3. I think GBW of the OTA itself inside is bigger than 200kHz. Usually we can think Gm doesn't depend on frequency, it is almost fixed at steady state. 4. For the whole converter system in TPS65400, we usually set the GBW to ~50KHz, you cannot get flat mid-band gain to 150kHz. And you can use type 3 cap(C1) to enlarge GBW slightly. BTW, I am not a designer for this part, i cannot get these specific parameters. Suggest to test the Bode plot for whole converter system directly, and check the pole and zero location." + }, { + "contentId" : "3316210", + "userName" : "Kurt Schmidt", + "rankPoints" : "9965", + "rankName" : "Genius", + "date" : "Apr 15, 2020 5:05 AM", + "userId" : "748218", + "content" : "Hello Zhao Ma, You stated, \"1. As i know, there is no limitation for OTA's GBW in TPS65400.\" If this was true then you would never say in point 4 below that \"you cannot get flat mid-band gain to 150kHz,\" because if the GBW of just the OTA was not limited we most certainly could get flat gain to 150kHz. Way beyond 150kHz in fact. You stated, \"Since there are other poles in OTA itself, we cannot use Gm/Cstray to calculate the GBW for OTA itself.\" If there are other poles inside the OTA these will limit the GBW of the OTA. You said it was not limited but now say there are poles in the OTA and poles by definition will limit the BW. This is contradictory. As I have been saying from the start, the OTA does have limited BW. You can see it in the transfer function measurement I posted above. Cstray will limit it as will the physical limits of the silicon. All I was asking is, what is the internal limit? You asked, \"2. What is your configuration when testing Bode plot? did you remove the Ccomp (4.7nF)? From your bode plot, apparently there is a dominant pole in low-band, it looks like you didn't remove the Ccomp, did you?\" That is a plot of just the Error Amp transfer function (from the feedback network to the COMP pin.) That is not a dominant low-band pole it is a dominant zero; And yes it is caused by Ccomp. But that is okay because the BW of the Error Amp will not be limited by Ccomp. Ccomp is what sets the zero to create a portion of flat mid-band gain. Croll will limit the BW but I have removed it. It is the pole near 60kHz (with no Croll loaded, just the Cstray) that tells me the OTA is nearing its BW limit. You stated, \"3. I think GBW of the OTA itself inside is bigger than 200kHz.\" Answers that begin with \"I think\" are not engineering answers and are not helpful to our customers. My measurements show it is approximately 160kHz. I would expect this information to be in the original device characterization data. Can you let me know who can access this data? You state, \"Usually we can think Gm doesn't depend on frequency, it is almost fixed at steady state.\" This is only true over a range from DC to some usable BW of the amplifier. In fact, the spec on the data sheet has to have been measured at, or over a range of, some conditions (e.g., voltage, temperature, Rload, Vin, frequency, ...) I would expect this to also be in the initial characterization data. Regardless, whether it is the Gm that is decreasing with frequency or a fixed Gm interacting with internal or stray C to create a pole, the OTA does have a GBW limit. You state, \"4. For the whole converter system in TPS65400, we usually set the GBW to ~50KHz, you cannot get flat mid-band gain to 150kHz.\" Thank you for confirming my initial point. There is indeed a BW limit in the Error Amplifier. It is not unlimited as initially stated but is in fact something less than 200kHz. This fact appears to severely limits the use of this converter in high-frequency switchers with large output capacitance that also require a crossover frequency above 10kHz- 20kHz (for example we desire Fsw=600kHz, Vin=12V, Vout = 1.1V, Iout = 1.5A, Cout = 250uF, Lout = 6.8uH or 2.2uH, Fc=60kHz.) The pole created by Cout and Rout rolls off the power stage transfer function such that more than 20dB of mid-band gain is needed out past 100kHz+ to get a loop crossover at 60kHz. You state, \"And you can use type 3 cap(C1) to enlarge GBW slightly.\" I almost never need to use type 3 compensation in a typical CM buck. The fact that it is needed at all with most TPS65400 designs is because the error amplifier BW is limited. Even then, the benefit is limited because type 3 uses a passive zero. It has no additional gain or phase increase once the feedback network reaches unity gain. Further, the lower the output voltage (1.1V in our case) the less benefit this passive zero contributes. When Vout = Vref it can't contribute anything. You state, \"Suggest to test the Bode plot for whole converter system directly, and check the pole and zero location.\" I have done this. The loop is stable. But I cannot move the error amp pole high enough to get a crossover frequency much above 20kHz. Hence my initial statement \"I suspect we might be BW limiting with higher Rcomp values.\" Can you tell me who can access the characterization data? Or who is more knowledgeable on this part? I can contact them directly. Respectfully, Kurt" + }, { + "contentId" : "3316448", + "userName" : "Zhao Ma", + "rankPoints" : "7070", + "rankName" : "Expert", + "date" : "Apr 15, 2020 9:23 AM", + "userId" : "4727719", + "content" : "Hi, Kurt Sorry for confusion, some clarifications: 1. I said \"there is no limitation for OTA's GBW\" --> I wanted to say there is no intentional limitation, sorry, I didn't express cautiously. I believe any OTAs have internal limitation: the high frequency poles which are generated by Cstray in the middle path of signal transmission, the OTA in TPS65400 is no exception. 2. Ccomp and Rea(output impedance of EA) form the dominant pole for converter, Ccomp value definitely can impact the bandwidth of converter. Rcomp and Ccomp form a Zero which can impact the gain of mid-band. Could you let me know the schematic? Rcomp=?, Comp=? 3. Sorry for \"I think\". 4. Agree with you, the Gm only keeps constant over a range from DC to some usable BW of the amplifier. 5. We can use the zero formed by Rcomp and Ccomp to compensate the pole formed by Rload and Cout. For your application, appropriate compensation cam make the converter's crossover frequency larger than 20kHz, and close to 50kHz based on my experience. 6. Agree with you, when output voltage is low, the benefit of Cff will be smaller. 7. Please reduce Comp and increase Rcomp to enlarge the converter's crossover frequency, try to make the Zero compensate Pole (Rload and Cout). 8. I can access the characterization data if it is tested by ATE, what characterization data do you want to know? If you want to know the parameters related with design, I can help to contact the designer. Anyway, what problems did the customer encounter? stability? load transient performance? And could you send me the customer's schematic?" + }, { + "contentId" : "3318273", + "userName" : "Kurt Schmidt", + "rankPoints" : "9965", + "rankName" : "Genius", + "date" : "Apr 16, 2020 4:09 PM", + "userId" : "748218", + "content" : "Contacting you directly by email. We can post the solution/issue here once we resolve it." + }, { + "contentId" : "3326546", + "userName" : "Zhao Ma", + "rankPoints" : "7070", + "rankName" : "Expert", + "date" : "Apr 24, 2020 2:56 AM", + "userId" : "4727719", + "content" : "Hi, Kurt Attach the test results here. You are correct, there is another pole locates at ~30kHz which limits the overall BW. I need to close this question now, further more questions, we can talk by emails. TPS65400_1p1V_600kHz.xlsx" + }, { + "contentId" : "3327705", + "userName" : "Kurt Schmidt", + "rankPoints" : "9965", + "rankName" : "Genius", + "date" : "Apr 25, 2020 12:49 AM", + "userId" : "748218", + "content" : "Thanks for working with me on this. From your measurements and mine it looks like the typical unity gain BW of the error amplifier lies somewhere between 100kHz and 160kHz depending on conditions of Rcomp and Ccomp. Inductors with values above 1uH under my operating condition pull the inductor pole (Km*Ri/L) down in frequency to where its phase impact is near to where the error amp phase is beginning to roll off due to limited BW. This can make it impossible to get sufficient phase margin for stability above 10-20kHz or so. My recommendations for anyone designing with this part under conditions similar to mine (actually all conditions for that matter) are as follows: 1. Keep L small. No more than 2.2uH under most conditions and 1uH or less with high capacitive, low-Vout, high Iout designs. This will keep the inductor pole as far away from crossover as possible (remember that the phase of a pole starts showing up a full decade below the actual pole frequency.) Ignore the guidelines for delta_IL (i.e., the ratio of inductor ripple current to total current.) With ceramic capacitors and single digit load currents, there really is no reason to try to keep the delta_Il at 30-40% maximum; Let it go to 100%-150% or more if necessary. Use the smallest value for slope compensation you can. This moves the inductor pole frequency up slightly. Increasing Gmps lowers the pole frequency but decreasing it lowers the power stage gain. So there is a point where making it too low requires even more gain from the already taxed error amplifier and a point where making it too high lowers the inductor pole too much. Experiment but I found the optimal number across different designs was usually 10A/V. 2. Use type II equations to compute Rc and Cc. But be aware that values of Rcomp much above 50-60 kohm will not yield the computed gain at crossovers much above 10kHz.. The error amplifier simply cannot deliver. 3. Leave Croll open; There is already 10pF stray capacitance present per your comment above, and there is no reason to add further roll-off to the error amplifier. It is doing this all on its own. 4. Place the Cff zero for maximum phase boost somewhere between the crossover frequency (this may not be the same as placing the zero at Fc) and the frequency of the inductor pole depending on performance. I have experimented with both. But be aware that the available phase-and-gain boost is limited the lower Vout goes (i.e, the closer Vout gets to Vref) because type III compensation uses a passive zero. There is no active gain behind it as would be the case with an OpAmp. If you can lower the Vref in your application then do it as this will add to the available passive phase/gain boost. A 1.1V output with a 0.6V reference yields almost 6dB of additional gain compared to a 1.1V output with a 0.8V reference. 5. If you get 45 degrees of phase margin you have done well. This is acceptable under many conditions. 6. Build, test, and tweak. Linear circuits are not linear when operated near BW or V-I limits. So be aware of relying on standard equations, of relying on equations that don't account for the inductor pole, of relying on equations that don't account for the limits of type III compensation, and of over-driving the injection signal when using a vector analyzer to measure transfer functions." + } ], + "tags" : [ "/support/power-management/f/196/tags/Bandwidth", "/support/power-management/f/196/tags/BW", "/support/power-management/f/196/tags/error%2bamp", "/support/power-management/f/196/tags/TPS65400" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/894847.json b/data/json/DLP/894847.json new file mode 100644 index 0000000000000000000000000000000000000000..10f6c67a07586533dae74a97132e1f10735b05f3 --- /dev/null +++ b/data/json/DLP/894847.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "894847", + "reporterName" : "liwei qi", + "rankPoints" : "945", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "WEBENCH® Tools/TPS40400: Vout Calibration Function", + "rankName" : "Intellectual", + "replies" : " 12", + "views" : " 55", + "queryText" : "Part Number: TPS40400 Tool/software: WEBENCH® Design Tools Calibrate output voltage and use the method as follow: VOUT_CAL_GAIN = 100*[(Vout1-Vout2)/(Read_vout1-Read_vout2)-1]. VOUT_CAL_OFFSET = Vout3 - Read_Vout3. For meet the requirement, set the load to 6A and the full load is 12A. But I found that the gain whcih I calculate is not in the limit. The limit in the datasheet is -0.125---+0.121%. Why?", + "partNumber" : " TPS40400", + "allResponseList" : [ { + "contentId" : "3309530", + "userName" : "David_Daniels", + "rankPoints" : "2325", + "rankName" : "Intellectual", + "date" : "Apr 7, 2020 8:23 PM", + "userId" : "14529", + "content" : "The LSB is 0.4%. The range is -12.5% to 12.1%" + }, { + "contentId" : "3309770", + "userName" : "liwei qi", + "rankPoints" : "945", + "rankName" : "Intellectual", + "date" : "Apr 8, 2020 2:10 AM", + "userId" : "5298010", + "content" : "I know the information which you gave. I want to know why I calculate VOUT_CAL_GAIN out of the limit? The TPS40400 is with default value." + }, { + "contentId" : "3310502", + "userName" : "David_Daniels", + "rankPoints" : "2325", + "rankName" : "Intellectual", + "date" : "Apr 8, 2020 3:34 PM", + "userId" : "14529", + "content" : "What values do you have for vout1, vout2, read_vout1 and read_vout2? And what gain value are you calculating?" + }, { + "contentId" : "3310992", + "userName" : "liwei qi", + "rankPoints" : "945", + "rankName" : "Intellectual", + "date" : "Apr 9, 2020 1:32 AM", + "userId" : "5298010", + "content" : "@12Vin 6A Load vout1 = 0.584V Vout2 = 4.88V Read_vout1 = 0.625V Read_vout2 = 5.07813V Vout_cal = 100*[(4.88-0.584)/(5.07813-0.625) - 1] = 100*0.009207007 = 0.920700721 As you can see, vout_cal is out of limit. Does the formula need to multiply by 100? which parameter I can write to GUI? Thank you very much!" + }, { + "contentId" : "3312006", + "userName" : "David_Daniels", + "rankPoints" : "2325", + "rankName" : "Intellectual", + "date" : "Apr 9, 2020 8:52 PM", + "userId" : "14529", + "content" : "How are you getting the wide output voltage range? Are you changing the external feedback divider? I am discussing this challenge with my team's pmbus specialist and I will get back too you on Monday." + }, { + "contentId" : "3312399", + "userName" : "liwei qi", + "rankPoints" : "945", + "rankName" : "Intellectual", + "date" : "Apr 10, 2020 8:21 AM", + "userId" : "5298010", + "content" : "I use an external resistor in my circuit for get the wide output voltage rang. Different resistor can get differernt output voltage. Thank you very much!" + }, { + "contentId" : "3314652", + "userName" : "David_Daniels", + "rankPoints" : "2325", + "rankName" : "Intellectual", + "date" : "Apr 14, 2020 2:45 AM", + "userId" : "14529", + "content" : "I emailed my colleague that works with PMBus and asked for an example on how to use VOUT_CAL_GAIN. He emailed me the typical calibration process outlined below. I think the difference in your scenario and the below is the example below is using 1 external divider gain. Since you have two different gains with the feedback divider, can you use two different vout_cal_gain. 1) Calibrate VOUT_SCALE_LOOP a. After Power-up, b. Set VOUT_SCALE_LOOP to match the nominal voltage divider from DIFFO to FB c. Set IOUT_CAL_GAIN to match the nominal DCR of the inductor + any current sense resistor used d. Set 2 different output voltages via VOUT_COMMAND, measure the real voltage they generate and read the READ_VOUT value. e. Adjust VOUT_SCALE_LOOP to correct the gain error from VOUT_COMMAND to Vout. i. VOUT_SCALE_LOOP (trimmed) = VOUT_COMMAND(pre-trim) x (VOUT1– VOUT2) / (VOUT_COMMAND1 – VOUT_COMMAND2) 2) Calibate VOUT_TRIM a. After trimming VOUT_SCALE_LOOP, set a new voltage and measure the real output voltage b. Adjust VOUT_TRIM i. VOUT_TRIM = VOUT_COMMAND – VOUT 3) Calibrate VOUT_CAL_GAIN a. Adjust VOUT_CAL_GAIN i. VOUT_CAL_GAIN = 1 – (READ_VOUT1-READ_VOUT2) / (VOUT1 – VOUT2) 4) Calibrate IOUT_CAL_GAIN a. Force 2 reference currents on the output and read READ_IOUT b. Adjust IOUT_CAL_GAIN i. IOUT_CAL_GAIN(trimed) = IOUT_CAL_GAIN(pre-trim) x (ILOAD1 – ILOAD2) / (READ_IOUT1 – READ_IOUT2) 5) Calibrate IOUT_CAL_OFFSET a. Force another reference current on the output b. Adjust IOUT_CAL_OFFSET i. IOUT_CAL_OFFSET = IOUT – READ_IOUT" + }, { + "contentId" : "3314996", + "userName" : "liwei qi", + "rankPoints" : "945", + "rankName" : "Intellectual", + "date" : "Apr 14, 2020 9:12 AM", + "userId" : "5298010", + "content" : "HI,David Daniels: In fact, I don't know what is meaning? This method is different which your colleague tell me. VOUT_CAL_GAIN = 100*[(Vout1-Vout2)/(Read_vout1-Read_vout2)-1]." + }, { + "contentId" : "3315925", + "userName" : "Peter James Miller", + "rankPoints" : "19805", + "rankName" : "Mastermind", + "date" : "Apr 14, 2020 9:46 PM", + "userId" : "8518", + "content" : "liwei qi vout1 = 0.584V Vout2 = 4.88V Read_vout1 = 0.625V Read_vout2 = 5.07813V Based on this data, the READ_VOUT function is reporting a -4.45313V (READ_VOUT1 - READ_VOUT2) change when the output voltage is actually changing -4.296V (4.88 - 0.584V) so the READ_VOUT/VOUT ratio is -4.4513/-4.296 = 1.036576 1 - 1.036576 = -0.036576 or -3.6576%. With an LSB of 0.4, you'll write a value of -9 into the register to reduce all of the READ_VOUT values by 3.6%. READ_VOUT1 will become 0.6025 READ_VOUT2 will become 4.895317 That's still showing an 18mV offset error at 0.584V and a 3mV gain error over the 4.296V range, but you can see that the gain factor has been significantly improved by trimming the READ_VOUT gain. For the decimal value to be written into the VOUT_CAL_GAIN register: VOUT_CAL_GAIN (integer) = ROUND( 100 * ( [ 1 - (READ_VOUT1 - READ_VOUT2) / (VOUT1 - VOUT2) ] / 0.004) ) The converts from the decimal ratio of Delta READ_VOUT / Delta Vout to the LSB with step-size 0.4%." + }, { + "contentId" : "3315932", + "userName" : "David_Daniels", + "rankPoints" : "2325", + "rankName" : "Intellectual", + "date" : "Apr 14, 2020 10:00 PM", + "userId" : "14529", + "content" : "Using your equation and the values of your variables, i calculate -3.5%, Using my colleagues equation I get -0.036 or -3.6%. If I did the conversion correctly, write C409h to D5h will give a READ _ VOUT _ CAL _ GAIN of -3.6%." + } ], + "tags" : [ "/support/power-management/f/196/tags/WEBENCH_AE00_%2bDesign%2bTools", "/support/power-management/f/196/tags/TPS40400" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/894934.json b/data/json/DLP/894934.json new file mode 100644 index 0000000000000000000000000000000000000000..f4e8e6ddc74f7ee9cb97c11248deff39c9597e4b --- /dev/null +++ b/data/json/DLP/894934.json @@ -0,0 +1,79 @@ +{ + "ticketNumber" : "894934", + "reporterName" : "ACGUY", + "rankPoints" : "8155", + "resolutionStatus" : "Resolved", + "ticketName" : "UCC28056: for 24V-AC input", + "rankName" : "Mastermind", + "replies" : " 8", + "views" : " 46", + "queryText" : "Part Number: UCC28056 Hello E2E, Our customer is considering that to use the UCC28056 for 24V-AC input power supply. Doescompany have any similar precedent for example of use? or cancompany introduce us to other recommended devices? The outline are following; : 24V-AC input is secondary side, final output power is 35V-DC/8A_max. : composition　 [24C-AC] -> [Ideal FET bridge(LM74670*4)] -> [PFC(UCC28xxx)] -> [DC/DC->35V] Regards, ACGUY", + "partNumber" : " UCC28056", + "allResponseList" : [ { + "contentId" : "3309655", + "userName" : "Hong Huang", + "rankPoints" : "18085", + "rankName" : "Mastermind", + "date" : "Apr 7, 2020 11:11 PM", + "userId" : "616779", + "content" : "Do you mean PFC for 24VAC input? Can you describe what is your input AC voltage and output DC voltage?" + }, { + "contentId" : "3309713", + "userName" : "ACGUY", + "rankPoints" : "8155", + "rankName" : "Mastermind", + "date" : "Apr 8, 2020 1:05 AM", + "userId" : "4372849", + "content" : "The attached file is idea from customer,I think that it works fine. But, I have not conviction, so please let me know your suggestion. B.R ACGUY" + }, { + "contentId" : "3309764", + "userName" : "Hong Huang", + "rankPoints" : "18085", + "rankName" : "Mastermind", + "date" : "Apr 8, 2020 2:04 AM", + "userId" : "616779", + "content" : "Its concept should be ok. But since the voltage is low the current becomes high for the same power. Even with close to 1 PF, its power losses will be high. Also for high current the size may become bigger. Not sure if this is a worth trying idea. But theoretically the idea can work. It is better to understand the benefit from this idea." + }, { + "contentId" : "3309769", + "userName" : "Hong Huang", + "rankPoints" : "18085", + "rankName" : "Mastermind", + "date" : "Apr 8, 2020 2:09 AM", + "userId" : "616779", + "content" : "Also, does the load require energy holdup - if so its PFC capacitance will be high. In short, you may ask your customer why doing this to move on. The IC should be ok to make control just it looks with high power losses and bigger PFC bulk capacitors which may make a bulky design. What is the frequency of AC100 to AC24, if 50 to 60Hz, the transformer will be \"huge\" comparing to one with high switching frequency." + }, { + "contentId" : "3314915", + "userName" : "ACGUY", + "rankPoints" : "8155", + "rankName" : "Mastermind", + "date" : "Apr 14, 2020 7:43 AM", + "userId" : "4372849", + "content" : "Hi, AC frequency is 50/60Hz, it's from general AC input voltage. If you designer, which will you choose DCM(QRM) or CCM for PFC? Please let me know your opinion. Regards, ACGUY" + }, { + "contentId" : "3315784", + "userName" : "Hong Huang", + "rankPoints" : "18085", + "rankName" : "Mastermind", + "date" : "Apr 14, 2020 7:20 PM", + "userId" : "616779", + "content" : "You will need to try each to see which one is better and in terms of what you defined. As I am not understanding any benefit from this idea, I cannot provide my opinion as some criteria need to set up first before pick up what best to be. You need to tell me what benefit the design wants to achieve in order to see what to be the best or better trade-offs. This idea looks to me bulky and big, heavier, high cost, and more power losses. You need to ask why you need such a design and share it, before you ask opinions from others." + }, { + "contentId" : "3323639", + "userName" : "ACGUY", + "rankPoints" : "8155", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 1:41 AM", + "userId" : "4372849", + "content" : "Hi, I change the words for question. Do you know the PFC-controller that can operation on AC-24V input bycompany solution? Regards, ACGUY" + }, { + "contentId" : "3324157", + "userName" : "Hong Huang", + "rankPoints" : "18085", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 11:51 AM", + "userId" : "616779", + "content" : "No we never have such an application and cannot comment. You need make research to get your own solution." + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC28056" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/894969.json b/data/json/DLP/894969.json new file mode 100644 index 0000000000000000000000000000000000000000..11920963a9d6e591e7d0b355f8bd7e1014decb5a --- /dev/null +++ b/data/json/DLP/894969.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "894969", + "reporterName" : "Devayani Bodar", + "rankPoints" : "85", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ76940: BQ76940 to design the 15S BMS. I have one problem.cell 10,11,12,13 and 14 cell reading zero value", + "rankName" : "Prodigy", + "replies" : " 6", + "views" : " 44", + "queryText" : "Part Number: BQ76940 Dear Team I am using the BQ76940 to design the 15S BMS. I have one problem. We connected Cell 0 to 14 in series , through resistor divider networks series resistors of 100E (to work as cell simulator), VBAT=36V all cell are reading ok except cell 10,11,12,13 and 14 cell reading is sowing half of actual. it looks problem with 3rd bank of BQ IC. Two banks 1 & 2 (Group of 5 cell each bank ) of BQ is reading perfectly. We also connected TS1 , TS2, TS3 with 10K Resistors. it is not floating. Please let us know the solution. Thanks Devayani", + "partNumber" : " BQ76940", + "allResponseList" : [ { + "contentId" : "3308944", + "userName" : "Matt Sunna", + "rankPoints" : "24930", + "rankName" : "Mastermind", + "date" : "Apr 7, 2020 1:35 PM", + "userId" : "269312", + "content" : "Hi Davayani, This is not a normal behavior, so I am not sure what would cause the issue you are seeing. There are a number of important connections in the schematic that can be a little tricky. I recommend going through this video to see if it helps reveal anything: /how-create-schematic-bq76920-bq76930-and-bq76940 After going through the video, let me know if you are still not able to find the issue. Best regards, Matt" + }, { + "contentId" : "3320199", + "userName" : "Devayani Bodar", + "rankPoints" : "85", + "rankName" : "Prodigy", + "date" : "Apr 18, 2020 6:40 AM", + "userId" : "4478295", + "content" : "Dear Matt, Thanks for feedback. We have gone through video and verified all the connection as per guideline. We have connected battery pack with 12Cell configuration and now we are able to read cell voltage as expected except cell 11,12 and 13 - we are reading 0.7V instead of 3.3V. rest of all cell voltage we are able to read properly using micro controller i2C line. We have not turned on cell balancing yet. just we are reading cell voltage. Please let me know what will be the issue, We wanted to start production once this issue is resolved, we are really struggling to resolve this issue, Thanks, Devayani" + }, { + "contentId" : "3320372", + "userName" : "Matt Sunna", + "rankPoints" : "24930", + "rankName" : "Mastermind", + "date" : "Apr 18, 2020 11:00 PM", + "userId" : "269312", + "content" : "Hi Davayani, If you can send your schematic, I can check it for connection issues. As I said, this is not normal behavior for the device, so there is likely an issue causing the upper cell group to not report voltages correctly. Best regards, Matt" + }, { + "contentId" : "3320394", + "userName" : "Devayani Bodar", + "rankPoints" : "85", + "rankName" : "Prodigy", + "date" : "Apr 19, 2020 4:15 AM", + "userId" : "4478295", + "content" : "Schematic Page-1.pdfSchematic Page-2.pdf Dear Matt, Please find attached schematic for your review. after review can you conclude like area of problem . Hardware side or software side any improvements etc.. Thanks, Devayani Bodar" + }, { + "contentId" : "3321538", + "userName" : "Matt Sunna", + "rankPoints" : "24930", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 3:58 PM", + "userId" : "269312", + "content" : "Hi Devayani, In your schematic it does not look like you are connecting unused cells as recommended by the datasheet. Please see Table 26 in the datasheet for how to connect a 12-cell application. Regards, Matt" + }, { + "contentId" : "3322391", + "userName" : "Devayani Bodar", + "rankPoints" : "85", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 6:38 AM", + "userId" : "4478295", + "content" : "Dear Matt, We again verified connections as per your suggestions, now issue is resolved. Thanks, Devayani" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ76940" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895039.json b/data/json/DLP/895039.json new file mode 100644 index 0000000000000000000000000000000000000000..b3391ad8c0f693e138bff34190cf5abe761124a4 --- /dev/null +++ b/data/json/DLP/895039.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "895039", + "reporterName" : "Marco Fogli", + "rankPoints" : "40", + "resolutionStatus" : "", + "ticketName" : "TPS65400-Q1: TPS65400 output current boosting", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 41", + "queryText" : "Part Number: TPS65400-Q1 Dear Sirs, I have developed a module with one TPS65400 to provide 3 output rail for a FPGA board: +1V, +3.3V and 2.5V (buck 1 and buck 2 in shared configuration). My company would like to upgrade the FPGA size on the old board to improve the signal processing performance: doing so the +1V rail current increase very much, from to actual 8A to 17A, in the worst case. My first idea was to connect a half-bridge mosfet stage on the buck1 output node, providing the correct driving and the necessary dead-time from hi-side and low-side mosfet. However, after this first idea, here is my doubt: how the internal regulator could be work (it would be a Current Mode), when the TPS65400 output stage will do not supply the current of the output filter? Further, I have more questions: Is there is a method to resolve this? Is there a correct schematic approach to do that? Thank you very much in advance Marco", + "partNumber" : " TPS65400-Q1", + "allResponseList" : [ { + "contentId" : "3309808", + "userName" : "Zhao Ma", + "rankPoints" : "7070", + "rankName" : "Expert", + "date" : "Apr 8, 2020 2:56 AM", + "userId" : "4727719", + "content" : "Hi, Marco 1. I think your idea is not practical. 2. Suggest to use a higher current devices: Integrated power FET: TPS544B20 or TPS544B25. External power FET: TPS40192 or LM3000." + }, { + "contentId" : "3322107", + "userName" : "Zhao Ma", + "rankPoints" : "7070", + "rankName" : "Expert", + "date" : "Apr 21, 2020 12:32 AM", + "userId" : "4727719", + "content" : "Hi, Marco Some comments: 1. “My first idea was to connect a half-bridge mosfet stage on the buck1 output node, providing the correct driving and the necessary dead-time from hi-side and low-side mosfet. ” How do you provide the correct driving for half-bridge mosfet stage? Would you add external EA and PWM comparator? 2. \"how the internal regulator could be work (it would be a Current Mode), when the TPS65400 output stage will do not supply the current of the output filter? \" TPS65400 internal regulator operation is decided by FB voltage, when FB > reference voltage, it will work in PSM mode, turn off the internal high-side and low-side FET. If TPS65400 sees the FB < reference voltage, it will start switching to charge output." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS65400_2D00_Q1", "/support/power-management/f/196/tags/TPS65400" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895049.json b/data/json/DLP/895049.json new file mode 100644 index 0000000000000000000000000000000000000000..2045d788c57a5c84336cadf00ce77548e2c7363b --- /dev/null +++ b/data/json/DLP/895049.json @@ -0,0 +1,79 @@ +{ + "ticketNumber" : "895049", + "reporterName" : "Carlo Cabaccan", + "rankPoints" : "2530", + "resolutionStatus" : "", + "ticketName" : "UCD9244: Certificates of Volatility", + "rankName" : "Intellectual", + "replies" : " 8", + "views" : " 49", + "queryText" : "Part Number: UCD9244 Hi team, Good day. Do we have the Certificates of Volatility for UCD9244RGCT? Thank you in advance for your help. Regards, Carlo", + "partNumber" : " UCD9244", + "allResponseList" : [ { + "contentId" : "3309411", + "userName" : "Qian Chen", + "rankPoints" : "21370", + "rankName" : "Mastermind", + "date" : "Apr 7, 2020 6:48 PM", + "userId" : "1501908", + "content" : "Hi Carlo, I will check with team and get back to you. It may take some time. Thanks Qian" + }, { + "contentId" : "3310704", + "userName" : "Qian Chen", + "rankPoints" : "21370", + "rankName" : "Mastermind", + "date" : "Apr 8, 2020 6:18 PM", + "userId" : "1501908", + "content" : "Hi Carlo, We don't have formal Certificates of Volatility document. This part contains both volatile memory and non-volatile memory. Thanks Qian" + }, { + "contentId" : "3315586", + "userName" : "Carlo Cabaccan", + "rankPoints" : "2530", + "rankName" : "Intellectual", + "date" : "Apr 14, 2020 4:30 PM", + "userId" : "5915269", + "content" : "Hi Qian, Good day. According to our customer, ifcompany cannot provide certificates of volatility is there a way to confirm that the NVM (non-volatile memory) as read-only or a description of the contents of the NVM. That would go a long way to assuring the US government without the certificates of volatility. Regards, Carlo" + }, { + "contentId" : "3315924", + "userName" : "Qian Chen", + "rankPoints" : "21370", + "rankName" : "Mastermind", + "date" : "Apr 14, 2020 9:45 PM", + "userId" : "1501908", + "content" : "Hi Carlo, UCD9244 is a PMBus device. Most NVM registers are readable and writable, so user can program the part and store the programming to NVM. Thanks Qian" + }, { + "contentId" : "3319745", + "userName" : "Carlo Cabaccan", + "rankPoints" : "2530", + "rankName" : "Intellectual", + "date" : "Apr 17, 2020 4:36 PM", + "userId" : "5915269", + "content" : "Hi Qian, Good day. Our customer has shared the sample document for the Certificate of Volatility they need. Can we provide the same documentation? Please see the attachment. Redacted Example of Certificate of Volatility.pdf Regards, Carlo" + }, { + "contentId" : "3327602", + "userName" : "Carlo Cabaccan", + "rankPoints" : "2530", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 9:57 PM", + "userId" : "5915269", + "content" : "Hi Qian, Good day. Do we have an update on this? Thank you. Regards, Carlo" + }, { + "contentId" : "3328755", + "userName" : "Qian Chen", + "rankPoints" : "21370", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 1:11 PM", + "userId" : "1501908", + "content" : "Hi Carlo, Sorry for the late reply. Let me check if we can provide similar document. Thanks Qian" + }, { + "contentId" : "3329688", + "userName" : "Qian Chen", + "rankPoints" : "21370", + "rankName" : "Mastermind", + "date" : "Apr 28, 2020 12:54 AM", + "userId" : "1501908", + "content" : "Hi Carlo, Can you contact me by email? Just want to understand which customer we are support and if they have NDA with TI. thanks Qian" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCD9244" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895075.json b/data/json/DLP/895075.json new file mode 100644 index 0000000000000000000000000000000000000000..3f42c232d5a86e87a08578d30441bb57db615e7c --- /dev/null +++ b/data/json/DLP/895075.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "895075", + "reporterName" : "Omer Kvitel", + "rankPoints" : "30", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS7A85: Shottky Diode for reverse current protection", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 22", + "queryText" : "Part Number: TPS7A85 Hi I would like to understand how to choose the shottky diode for reverse current protection: From the data sheet, there is a recommendation to use a shottky diode for reverse current protection: (Figure 57) /tool/TPS7A85EVM-754?keyMatch=TPS7A85%20&tisearch=Search-EN-everything&usecase=part-number I would like to know if there is a recommendation bycompany to such a diode (what they used in order to verify it). In the EVB: /lit/ug/sbvu029/sbvu029.pdf I didn’t find this implementation. Regards Omer", + "partNumber" : " TPS7A85", + "allResponseList" : [ { + "contentId" : "3310365", + "userName" : "JCHK", + "rankPoints" : "27915", + "rankName" : "Mastermind", + "date" : "Apr 8, 2020 2:09 PM", + "userId" : "1108707", + "content" : "Hi Omer, I would recommend picking a diode that can handle the worst-case peak current based on how much output capacitance you have at VOUT. The worst-case scenario for reverse current is when the regulator is actively regulating and the input voltage is suddenly shorted. I hope this helps." + }, { + "contentId" : "3323245", + "userName" : "Omer Kvitel", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 5:56 PM", + "userId" : "5324262", + "content" : "Dear John Meaning if I plan for a 4[A] maximum current from the LDO - the diode needs to have this limit as well? Regards Omer" + }, { + "contentId" : "3323307", + "userName" : "JCHK", + "rankPoints" : "27915", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 6:48 PM", + "userId" : "1108707", + "content" : "Hi Omer, No. The diode is only providing a path to discharge VOUT to VIN in the event that VIN is suddently shorted. Assuming you have a 47uF capacitor at COUT and VOUT is 3.3V, then the amount of energy stored on the capacitor is 1/2CV^2. or 255mW. if the load was drawing essential no power and VIN is shorted, this is the amount of energy that would be dissipated by the diode. In this case something like this could be sufficient. I hope this helps to clarify." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS7A85", "/support/power-management/f/196/tags/TPS7A85EVM_2D00_754" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895086.json b/data/json/DLP/895086.json new file mode 100644 index 0000000000000000000000000000000000000000..538ac45d0924db0ecc828d7affba2287f71dbf87 --- /dev/null +++ b/data/json/DLP/895086.json @@ -0,0 +1,71 @@ +{ + "ticketNumber" : "895086", + "reporterName" : "JDo872", + "rankPoints" : "120", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ40Z80: Parameter setting : Enable permanent failures PF A . Why doescompany technical reference does not recommend Enable any of failure mode( QIM, OTF,COVL,SOT,SOC,SOCC,SOV,SUV) ? Is there an issue with the IC function?", + "rankName" : "Prodigy", + "replies" : " 7", + "views" : " 47", + "queryText" : "Part Number: BQ40Z80 Parameter setting : Enable permanent failures PF A . Why doescompany technical reference does not recommend Enable any of failure mode( QIM, OTF,COVL,SOT,SOC,SOCC,SOV,SUV) ? Is there an issue with the IC function?", + "partNumber" : " BQ40Z80", + "allResponseList" : [ { + "contentId" : "3309440", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 7, 2020 7:09 PM", + "userId" : "3528441", + "content" : "Hello Jim, Let me check with the folks that wrote the TRM." + }, { + "contentId" : "3309442", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 7, 2020 7:10 PM", + "userId" : "3528441", + "content" : "In the mean time, can you provide me which parameters you need or want to use?" + }, { + "contentId" : "3309586", + "userName" : "JDo872", + "rankPoints" : "120", + "rankName" : "Prodigy", + "date" : "Apr 7, 2020 9:24 PM", + "userId" : "6276129", + "content" : "i want to use the SOV , SOCD and SOCC functions" + }, { + "contentId" : "3312161", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 10, 2020 1:29 AM", + "userId" : "3528441", + "content" : "Hello JDo, The TRM recommends a 0 (default) value because this setting will blow a fuse. If a customer does not really mean to enable this feature without understanding how it works, then it adds more complexity if something does go wrong." + }, { + "contentId" : "3315938", + "userName" : "JDo872", + "rankPoints" : "120", + "rankName" : "Prodigy", + "date" : "Apr 14, 2020 10:07 PM", + "userId" : "6276129", + "content" : "Hi Kang, I understand there are two options to set the packs to a permanent failure mode and trigger the chemfuse if the condition meet ( ie.SOV safety over voltage occurred) . Could you go over a quick review of my settings before I release the design? I can send it directly to your email" + }, { + "contentId" : "3322048", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 20, 2020 10:45 PM", + "userId" : "3528441", + "content" : "Hello Jim, I suggest testing/validation of the settings on your end in particular to system performance as these things often are hard to test by inspection of the gg file. Thanks" + }, { + "contentId" : "3323411", + "userName" : "JDo872", + "rankPoints" : "120", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 8:13 PM", + "userId" : "6276129", + "content" : "Thanks Kang" + } ], + "tags" : [ "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2bBQ40Z80", "/support/power-management/f/196/tags/bq40z80" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895117.json b/data/json/DLP/895117.json new file mode 100644 index 0000000000000000000000000000000000000000..21b3117e7d8a489af692a474a2d17d949b728281 --- /dev/null +++ b/data/json/DLP/895117.json @@ -0,0 +1,79 @@ +{ + "ticketNumber" : "895117", + "reporterName" : "Dharmesh Joshi", + "rankPoints" : "1435", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "HDC1080: Sample reading and setup", + "rankName" : "Expert", + "replies" : " 8", + "views" : " 78", + "queryText" : "Part Number: HDC1080 Hi I am currently using the HDC1080 and would like to know the following so i can optimise the best way of using it? 1. What is the purpose or correct way to use the heater? Is there away on power up to detect the necessity of heater ? Under what circumstance would we need to use it? 2. There is RST bit in the configuration what is the purpose of it? 3. Once a minute i am reading temperature/humidity sample. Is once sample reading enough, or should i be reading it multiple times within that minute for an average? As the output is digital data, i though averaging might not be necessary? 4. Can the size of GND plane or GND pour have any effect on the results. At times two device next to each other would have few degrees for temperature or % for humidity difference. Is this acceptable? If one the PCB is charging a PCB the sensor does show about 5-6 degree extra on that. 5. I manually soldered the IC using hot air, i then cleaned the board to remove all the flux. Can this effect the readings? Thank You Regards DJ", + "partNumber" : " HDC1080", + "allResponseList" : [ { + "contentId" : "3310156", + "userName" : "Dharmesh Joshi", + "rankPoints" : "1435", + "rankName" : "Expert", + "date" : "Apr 8, 2020 10:37 AM", + "userId" : "4921425", + "content" : "Hi I have recently noticed that i was to take my unit from indoors to outdoors, the temperature starts increasing even though the temperature is much lower outside. Can condensation cause such effect? Thanks DJ" + }, { + "contentId" : "3310330", + "userName" : "Brandon Fisher94", + "rankPoints" : "4650", + "rankName" : "Expert", + "date" : "Apr 8, 2020 1:39 PM", + "userId" : "4996883", + "content" : "Hi Dharmesh, Thank you for your post. Dharmesh Joshi 1. What is the purpose or correct way to use the heater? Is there away on power up to detect the necessity of heater ? Under what circumstance would we need to use it? The heater is used to drive condensate that builds up over time off of the device. You could apply the heater regularly (say briefly at startup), or use it conditionally if condensation is known to have occurred. Dharmesh Joshi 2. There is RST bit in the configuration what is the purpose of it? This triggers a soft reset of the device, restoring it to the default settings. You can also do this by switching the supply, but having a soft reset available is often more convenient. Dharmesh Joshi 3. Once a minute i am reading temperature/humidity sample. Is once sample reading enough, or should i be reading it multiple times within that minute for an average? As the output is digital data, i though averaging might not be necessary? That depends largely on your application. You don't need to average to meet the datasheet specifications of the device, so in general I would say not to bother averaging the readings. It may be true that you see smoother \"jumps\" in the returned data if you choose to average it, but that doesn't necessarily mean the returned data is more accurate. Dharmesh Joshi 4. Can the size of GND plane or GND pour have any effect on the results. At times two device next to each other would have few degrees for temperature or % for humidity difference. Is this acceptable? If one the PCB is charging a PCB the sensor does show about 5-6 degree extra on that. It makes sense that your charging PCB would be hotter. When not charging, the difference you are observing is not uncommon. There is likely to be some difference in temperature between two boards even if they are in close proximity to each other. This difference will likely reduce in a chamber, and would be even smaller in an oilbath. When in open air, things like handling the boards, and the presence of air currents can account for these differences. Dharmesh Joshi 5. I manually soldered the IC using hot air, i then cleaned the board to remove all the flux. Can this effect the readings? A hot air reflow isn't generally an issue, but no-clean flux should be used for the HDC part. Flux cleaners are likely to affect the humidity readings. You can see our guidance on assembly and handling here: /support/sensors/f/1023/t/879064. Dharmesh Joshi I have recently noticed that i was to take my unit from indoors to outdoors, the temperature starts increasing even though the temperature is much lower outside. Can condensation cause such effect? Condensation could have this effect if it was causing the board to draw more power via a short, but I wouldn't expect it as a rule of thumb. If the device was in direct contact with condensation than the effects would be somewhat unpredictable. If you were recently handling the board and device, body heat could also be the culprit. Please let me know if you have any additional questions. Best Regards, Brandon Fisher" + }, { + "contentId" : "3322703", + "userName" : "Dharmesh Joshi", + "rankPoints" : "1435", + "rankName" : "Expert", + "date" : "Apr 21, 2020 12:23 PM", + "userId" : "4921425", + "content" : "Dear Brandon Thank You for your reply, very sorry for that late response. Is there away to work out when to use the heater? We would prefer to do this automatically,but can always allow users to manually send a command to the PCB to start it. What would be the max duration? RST makes sense now, its purpose is to set it back to the default reg values. I presume if you know the default values then this RST bit would not really be required? Once the Rst bit is set do you need to release it to stop any further resets from happening? I will keep my sample to once a minute. When a board is charging the difference to another board close it it is about 3.8 degrees The aim is the measure atmosphere temperature/ humidity for agriculture/green houses. Does it make a difference if sensor is on the PCB inside an enclosure or another PCB hanging outside the enclosure? What is the difference between HDC1080 and HDC 2080? Is there more superior IC to use for my application ?. In regards to taking my device in the outdoors i released that my enclosure top is clear, and was causing the temperature to rise, so it was not caused by condensation. In regards condensation , could it be possible that an issue would arise if during the day time it was hot and during the night temperature were to drop?" + }, { + "contentId" : "3322990", + "userName" : "Brandon Fisher94", + "rankPoints" : "4650", + "rankName" : "Expert", + "date" : "Apr 21, 2020 2:56 PM", + "userId" : "4996883", + "content" : "Hi Dharmesh, This thread provides some guidance on how to use the heater of the HDC1080. The max duration would depend on multiple factors for the HDC1080, because the heater only actually runs during conversion. Typically this would be very long. Dharmesh Joshi RST makes sense now, its purpose is to set it back to the default reg values. I presume if you know the default values then this RST bit would not really be required? Once the Rst bit is set do you need to release it to stop any further resets from happening? You don't have to use the soft reset bit ever if you don't want to, and the reset bit will not trigger multiple resets, it will simply return to 0 after the reset is performed. Dharmesh Joshi The aim is the measure atmosphere temperature/ humidity for agriculture/green houses. Does it make a difference if sensor is on the PCB inside an enclosure or another PCB hanging outside the enclosure? You typically do not want the PCB with the HDC device sitting entirely exposed, inside a case is better. That case should have some ventilation to allow for exchange of air between the ambient environment and the inside of the case. Dharmesh Joshi What is the difference between HDC1080 and HDC 2080? Is there more superior IC to use for my application ?. I would only use the HDC1080 if you need to operate at 5V, otherwise I would recommend using the HDC2080. The HDC2080 is newer and has better performance. Dharmesh Joshi In regards to taking my device in the outdoors i released that my enclosure top is clear, and was causing the temperature to rise, so it was not caused by condensation. That makes sense, I hadn't considered that as a possibility, but good catch. Dharmesh Joshi In regards condensation , could it be possible that an issue would arise if during the day time it was hot and during the night temperature were to drop? Yes, it is possible for condensation to occur due to day/night temperature cycles. You might have to consider designing with the HDC2021, and doing a board conformal coating if you can't reliably prevent condensation in your environment. Conformal coating will protect the rest of your board from moisture Please let me know if you have any more questions. Best Regards, Brandon Fisher" + }, { + "contentId" : "3323604", + "userName" : "Dharmesh Joshi", + "rankPoints" : "1435", + "rankName" : "Expert", + "date" : "Apr 22, 2020 12:54 AM", + "userId" : "4921425", + "content" : "Hi Brendon I am using the hdc1080 with 3.3v, what effect would that have? I am also working on a N02 gas sensor that also needs to monitor temperature near the sensor. Could these sensors be ok or would a pt1000 be better as I would need about 5cm wiring. How many hdc2021 can I connect on one i2c bus?" + }, { + "contentId" : "3325007", + "userName" : "Brandon Fisher94", + "rankPoints" : "4650", + "rankName" : "Expert", + "date" : "Apr 23, 2020 12:06 AM", + "userId" : "4996883", + "content" : "Hi Dharmesh, The HDC1080 will be fine with 3.3V, but I typically recommend the HDC20XX family of sensors since they are newer, and have better RH accuracy. If you just need the temperature sensing element this sensor would be fine. I can't guarantee that the RH sensor wouldn't be affected by anything else in your application environment, the only way to test that may be to take an EVM and try it out. 5 cm of cable also shouldn't be an issue with an I2C sensor provided you don't have any large unusual sources of capacitance on the bus. Dharmesh Joshi How many hdc2021 can I connect on one i2c bus? You could use 2 HDC2021's without additional hardware. If you wanted more than two you would need to use an I2C Mux or a separate I2C channel to avoid address overlap. Best Regards, Brandon Fisher" + }, { + "contentId" : "3325496", + "userName" : "Dharmesh Joshi", + "rankPoints" : "1435", + "rankName" : "Expert", + "date" : "Apr 23, 2020 10:41 AM", + "userId" : "4921425", + "content" : "Hi Brandon Thanks We will use HDC2021 for all new designs, how does this differ to the HDC2080? Is it possible to have samples of HDC2021 ? As it seems to be a very new. We would also use HDC2021 for all new production runs for all old PCB designs, this way we only need to purchase HDC2021. I believe the firmware would be identical subject to the HDC1080? And would be pin compatible as my old boards have pin 3 and 4 not connected to anything?" + }, { + "contentId" : "3326538", + "userName" : "Josh Wyatt", + "rankPoints" : "61360", + "rankName" : "Guru", + "date" : "Apr 24, 2020 2:42 AM", + "userId" : "614", + "content" : "Dharmesh - The HDC2021 is basically the same as the HDC2080 from a pinout and firmware perspective. This device has a removable tape cover and the opening in the device was moved to the center, to allow the tape to adhere to the package. The preview product page for the HDC2021 is here: /product/HDC2021 and from here on that page you can either request samples (middle of the row) or order some (red button on the left in that row) /product/HDC2021#order-quality The firmware is not the same as the HDC1080, Please see this FAQ post which covers this topic in detail /support/sensors/f/1023/t/878712 The board layout for the HDC1080 will support the HDC20xx devices, as the pins 3 and 4 are no connects for the HDC1080 and the three parts (HDC1080, HDC2080 and HDC2021) have same default I2C address, however, if you have the opportunity to update your board at some point, you could connect pin 4 to interruptible GPIO on your MCU, to take advantage of the DRDY/INT feature the newer parts add." + } ], + "tags" : [ "/support/sensors/f/1023/tags/HDC1080" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895133.json b/data/json/DLP/895133.json new file mode 100644 index 0000000000000000000000000000000000000000..58c5ba578c8c96b1a690a83bb25b174cc2ece728 --- /dev/null +++ b/data/json/DLP/895133.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "895133", + "reporterName" : "user5612199", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TLV62090: Internal capacitance between FB and VOS", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 21", + "queryText" : "Part Number: TLV62090 Hello, I will use this product for DC voltage converter. Is there internal capacitance between FB and VOS? If so, would you tell me that capacity? Best regards, Kenichi", + "partNumber" : " TLV62090", + "allResponseList" : [ { + "contentId" : "3310163", + "userName" : "Zain Riaz", + "rankPoints" : "650", + "rankName" : "Prodigy", + "date" : "Apr 8, 2020 10:39 AM", + "userId" : "6122213", + "content" : "Hi Kenichi, I am not sure if there is any physical capacitor connected between the two pins. Any valuable information that is not confidential can be found in the datasheet. Based on the block diagram below, I do not see any capacitor connected between the pins. Can you share the reason why you ask? I might be able to help further. Thanks, Zain Riaz" + }, { + "contentId" : "3322283", + "userName" : "user5612199", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 4:33 AM", + "userId" : "5612199", + "content" : "Hi Zain Riaz, Thank you for your reply. An abnormal output problem has occurred due to the mismatch between the internal capacitance and the external resistance with other company 's power IC. Other company 's IC has internal capacitance by design. So we wanted to know that. Regards, Kenichi" + }, { + "contentId" : "3322711", + "userName" : "Zain Riaz", + "rankPoints" : "650", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 12:28 PM", + "userId" : "6122213", + "content" : "Hi Kenichi, Thanks for sharing the information. If you like I can look at the schematic diagram and any waveforms that show the output problem. Looking forward to your reply. Best Regards, Zain" + } ], + "tags" : [ "/support/power-management/f/196/tags/TLV62090" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895140.json b/data/json/DLP/895140.json new file mode 100644 index 0000000000000000000000000000000000000000..9dfc4baad8bf72c25291fbecf5ef7a6d2262e1d4 --- /dev/null +++ b/data/json/DLP/895140.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "895140", + "reporterName" : "Dimitri James", + "rankPoints" : "1185", + "resolutionStatus" : "Resolved", + "ticketName" : "[FAQ] What are the differences between ISO5851, ISO5852S, ISO5451 and ISO5452?", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 130", + "queryText" : "Part Number: ISO5851, ISO5852S, ISO5451, ISO5452 What are the differences between ISO5851, ISO5852S, ISO5451, and ISO5452? For what applications do the different features matter?", + "partNumber" : " ISO5851, ISO5852S, ISO5451, ISO5452", + "allResponseList" : [ { + "contentId" : "3309773", + "userName" : "Dimitri James", + "rankPoints" : "1185", + "rankName" : "Intellectual", + "date" : "Apr 8, 2020 2:11 AM", + "userId" : "6285312", + "content" : "What are the Shared Features? ISO5451, ISO5452, ISO5851, ISO5852S are a family of single-channel isolated gate drivers targeting IGBT & SiC applications. They are also offered in AEC-Q100 qualified variants. These devices are 2.5A/5A single channel isolated gate drivers with 5.7kVrms reinforced isolation Their shared feature set includes: DESAT protection w/ Fault alarm Miller clamp Output Short-circuit clamp Input & Output UVLO w/ “Power Good” ready indication How do the differences affect my choice? The specification differences are detailed in the table below. ISO5451 ISO5452 ISO5851 ISO5852S Output type Single Split-outputs Single Split-outputs VIORM Max Repetitive Peak voltage 1420 VPK 2121 VPK VIOWM Max Working Voltage 1420 VDC 2121 VDC 1000 VRMS 1500 VRMS VIOTM Max Transient Isolation Voltage 8000 VPK VIOSM Max Surge Isolation Voltage 6250 VPK 8000 VPK Minimum CMTI 50-kV/μs 100-kV/μs Soft turn-off on DESAT Detection No Yes No Yes AEC-Q100 Available Yes Split Outputs ISO5852S and ISO5452 split the turn-on and turn-off paths while ISO5451 and ISO5851 are single-output drivers. With split outputs, separate external gate resistors can be used for each path without requiring the addition of a diode. This feature is especially beneficial for driving SiC FETs. Isolation Ratings ISO5851 & ISO5852S are rated to withstand higher working and repetitive peak voltages than ISO5451 & ISO5452. The choice depends on the bus voltage in the system. CMTI CMTI is an important parameter that affects every switching cycle. ISO5851 and ISO5852S are High-CMTI rated >100kV/us. This effectively increases resiliency against large dv/dt transients caused by hard switching. Soft turn-off ISO5452 & ISO5852S have STO on DESAT detection. During a short-circuit event, fast turn-off of the IGBT can cause a spike in VCE due to parasitic inductances. This VCE transient can be large enough to cause failure of the IGBT. STO “softly” pulls the gate low over 2us to prevent damage. STO is most effective when driving high-power IGBTs with longer short circuit withstand times Additional Resources: SiC & IGBT Gate Driver Fundamentals Intro to Isolation Ratings & Standards" + } ], + "tags" : [ "/support/power-management/f/196/tags/ISO5852S_2D00_Q1", "/support/power-management/f/196/tags/ISO5451_2D00_Q1", "/support/power-management/f/196/tags/ISO5851_2D00_Q1", "/support/power-management/f/196/tags/ISO5452_2D00_Q", "/support/power-management/f/196/tags/ISO5452_2D00_Q1", "/support/power-management/f/196/tags/ISO5452", "/support/power-management/f/196/tags/ISO5851", "/support/power-management/f/196/tags/ISO5852S", "/support/power-management/f/196/tags/ISO5451" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895164.json b/data/json/DLP/895164.json new file mode 100644 index 0000000000000000000000000000000000000000..7c7f7d21489d9641542aeff1b35f0f7715dd1398 --- /dev/null +++ b/data/json/DLP/895164.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "895164", + "reporterName" : "Lin_Charles", + "rankPoints" : "2840", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC28251: Minimum on time and EN control discussion", + "rankName" : "Intellectual", + "replies" : " 12", + "views" : " 97", + "queryText" : "Part Number: UCC28251 Hi team, My customer whas two questions about this device, 1.Do we have some solution to use external circuit to limit UCC28251 minimum on time? They want to limit the minimu on time to 500ns. 2. When customer want to turn off this IC in OCP event, they pull down EN and SS pin, SS pin connect BC817 to GND. But they can still detect PWM signal. Do you think what is the root cause? Yellow: SS pink: PWM Output Thanks. BR, CL", + "partNumber" : " UCC28251", + "allResponseList" : [ { + "contentId" : "3311394", + "userName" : "Teng Feng", + "rankPoints" : "9390", + "rankName" : "Genius", + "date" : "Apr 9, 2020 11:30 AM", + "userId" : "5617595", + "content" : "Hi Charles， I will reply to you tomorrow. —— Teng" + }, { + "contentId" : "3313033", + "userName" : "Lin_Charles", + "rankPoints" : "2840", + "rankName" : "Intellectual", + "date" : "Apr 12, 2020 1:49 AM", + "userId" : "5039534", + "content" : "Hi Teng, Do you have any updates about this question? Thanks. BR, CL" + }, { + "contentId" : "3313279", + "userName" : "Teng Feng", + "rankPoints" : "9390", + "rankName" : "Genius", + "date" : "Apr 13, 2020 3:48 AM", + "userId" : "5617595", + "content" : "Hi Charles, Sorry I don't have such circuit that can limit the minimum on-time less than 500 ns. It is very strange why PWM still has output when SS pin is pulled to ground. Can you test that will the controller shout down when pulling SS pin to ground externally during normal operation. Regards, Teng" + }, { + "contentId" : "3313290", + "userName" : "Lin_Charles", + "rankPoints" : "2840", + "rankName" : "Intellectual", + "date" : "Apr 13, 2020 4:05 AM", + "userId" : "5039534", + "content" : "Hi Feng, This waveform is tested during normal operation. And I saw there is another thread below may have the same issue. Could you please help explain more? Thanks. BR, CL" + }, { + "contentId" : "3318735", + "userName" : "Lin_Charles", + "rankPoints" : "2840", + "rankName" : "Intellectual", + "date" : "Apr 17, 2020 12:31 AM", + "userId" : "5039534", + "content" : "Hi Feng, Could you please help share some of your comments here? This is urgent case for my customer. Thanks. BR, CL" + }, { + "contentId" : "3320156", + "userName" : "Lin_Charles", + "rankPoints" : "2840", + "rankName" : "Intellectual", + "date" : "Apr 18, 2020 2:59 AM", + "userId" : "5039534", + "content" : "Hi Feng, I do not see any response to this problem. Would appreciate it if you can share your comments by April 20th. Thanks. BR, CL" + }, { + "contentId" : "3320822", + "userName" : "Teng Feng", + "rankPoints" : "9390", + "rankName" : "Genius", + "date" : "Apr 20, 2020 6:44 AM", + "userId" : "5617595", + "content" : "Hi Charles, Sorry for the delay, since I just received the EVM. See the attached oscilloscope picture I tested by shorting SS to ground directly on the EVM, it shows pulling SS to ground can disable device and terminate PWM immediately. Could you advice customer try to shorting SS ground directly and share me the schematic at teng-feng@ Besides, the device can also be disabled by controlling EN pin." + }, { + "contentId" : "3321004", + "userName" : "Lin_Charles", + "rankPoints" : "2840", + "rankName" : "Intellectual", + "date" : "Apr 20, 2020 10:01 AM", + "userId" : "5039534", + "content" : "Hi Teng, Thank you for your response here. Customer cannot share schematic to us, for this is confidential information for them. They still have two questions about this device, 1. Do you pull EN pin to GND when you pull down the SS signal in the waveform you shared here? 2. Why output is not in the max duty in the SS stage? For COMP voltage is higher than RAMP here. CH1 COMP; CH2 RAMP; CH3 OUTPUT; BR, CL" + }, { + "contentId" : "3322600", + "userName" : "Teng Feng", + "rankPoints" : "9390", + "rankName" : "Genius", + "date" : "Apr 21, 2020 9:55 AM", + "userId" : "5617595", + "content" : "Hi Charles, 1./ I only pulled the SS pin to ground in the testing. Could customer try to short SS pin to ground directly? and they can only share a part of schematic. 2./ we can find there is an internal voltage offset at RAMP/CS pin from the block diagram. Regards, Teng" + }, { + "contentId" : "3324076", + "userName" : "Lin_Charles", + "rankPoints" : "2840", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 10:26 AM", + "userId" : "5039534", + "content" : "Hi Teng, Thank you for your response here. 1.See SS control circuit from customer. Customer redo the test again, and they found that when pull down SS pin ,the output will be zero after 58ms. Do you have some explanation about this waveform? 2. What is the internal voltage offset value? I cannot find it in our datasheet. Thanks. BR, CL" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC28251" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895167.json b/data/json/DLP/895167.json new file mode 100644 index 0000000000000000000000000000000000000000..e19f2e21848f1f8976124d35dc0e8ddebbe12b5e --- /dev/null +++ b/data/json/DLP/895167.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "895167", + "reporterName" : "user6303433", + "rankPoints" : "100", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ34Z100: BQ34Z100", + "rankName" : "Prodigy", + "replies" : " 10", + "views" : " 58", + "queryText" : "Part Number: BQ34Z100 1. I test the voltage,when VCC is 3.3V,then REGIN is 2.1V,but BQ34Z100 need 2.7~4.5V for REGIN, BQ34Z100 does't work. Could I delete R75,D13 and Q15 ? 2. The same I2C line is pulled up to 3.3V, will it impact BQ34Z100 communicate through EV2400 to computer?", + "partNumber" : " BQ34Z100", + "allResponseList" : [ { + "contentId" : "3310015", + "userName" : "user6303433", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Apr 8, 2020 7:53 AM", + "userId" : "6303433", + "content" : "There is no need to add mosfet between VCC and REGIN ,3.3V VCC is the same as 1-cell voltage,is it right?" + }, { + "contentId" : "3310836", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 8, 2020 9:03 PM", + "userId" : "1864278", + "content" : "1. I test the voltage,when VCC is 3.3V,then REGIN is 2.1V,but BQ34Z100 need 2.7~4.5V for REGIN, BQ34Z100 does't work. Could I delete R75,D13 and Q15 ? Can you share your latest schematic? 2. The same I2C line is pulled up to 3.3V, will it impact BQ34Z100 communicate through EV2400 to computer? It should not. Have you seen any issues? Andy" + }, { + "contentId" : "3311264", + "userName" : "user6303433", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Apr 9, 2020 8:28 AM", + "userId" : "6303433", + "content" : "" + }, { + "contentId" : "3313335", + "userName" : "user6303433", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Apr 13, 2020 6:07 AM", + "userId" : "6303433", + "content" : "Here the consumption current into REGIN is too much. When B7-B- voltage is 25V, VCC-B- is 3.3V, the consumption current into REGIN is 2.5mA and it will always be so much." + }, { + "contentId" : "3320249", + "userName" : "Mason Liu", + "rankPoints" : "890", + "rankName" : "Intellectual", + "date" : "Apr 18, 2020 10:50 AM", + "userId" : "5991634", + "content" : "Hi, You mean you already remove the R75,D13 and Q15, and test the REGIN is 2.1V, consumption current is 2.5mA? Thanks. Best regards Mason" + }, { + "contentId" : "3320596", + "userName" : "user6303433", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 1:30 AM", + "userId" : "6303433", + "content" : "remove the R75,D13 and Q15, and test the REGIN is 3.3V, consumption current is 2.5mA It's so big that I have to delete BQ34Z100 and use other solution to solve my trouble." + }, { + "contentId" : "3320701", + "userName" : "Mason Liu", + "rankPoints" : "890", + "rankName" : "Intellectual", + "date" : "Apr 20, 2020 4:06 AM", + "userId" : "5991634", + "content" : "Hi, How did you measure the consumption current? By the pull-up resistor? Best regards Mason" + }, { + "contentId" : "3320890", + "userName" : "user6303433", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 7:57 AM", + "userId" : "6303433", + "content" : "YES" + }, { + "contentId" : "3327613", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 24, 2020 10:04 PM", + "userId" : "3528441", + "content" : "Can we get a scope capture of the current waveform across that resistor? Is this a continuous 2 mA?" + }, { + "contentId" : "3329957", + "userName" : "Mason Liu", + "rankPoints" : "890", + "rankName" : "Intellectual", + "date" : "Apr 28, 2020 6:14 AM", + "userId" : "5991634", + "content" : "Hi, We would recommend you to remove the R55, When VEN output low, there will be a voltage drop on R55. That might cause current up to 2.5mA. Thanks. Best regards Mason" + } ], + "tags" : [ "/support/power-management/f/196/tags/EV2400", "/support/power-management/f/196/tags/bq34z100" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895302.json b/data/json/DLP/895302.json new file mode 100644 index 0000000000000000000000000000000000000000..a4ed1871e9b1cfa3215e9e678bdaea1f37dd5640 --- /dev/null +++ b/data/json/DLP/895302.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "895302", + "reporterName" : "Alessandro Ferrari", + "rankPoints" : "450", + "resolutionStatus" : "", + "ticketName" : "IWR6843AOPEVM: IWR6843AOPEVM", + "rankName" : "Intellectual", + "replies" : " 5", + "views" : " 105", + "queryText" : "Part Number: IWR6843AOPEVM Dearcompany techical support, we suspect a MAJOR bug in the firmware of the SDK Demo - 68xx AOP for thecompany IWR6843AOPEVM. We setted up the experiment installing the demoboard perfectly vertical on the edge of a table at 1 mt height from the ground. We used the following parameters set: Desirable resolution: Best Range Resolution Frequency band: 60-64 GHz Frame rate: 10 fps Resolution: 0,044 m Maximum unambiguous range: 9,06 m Maximum radial velocity: 2 m/sec Radial velocity resolution: 0,26 m/sec Scatter plot selection In particular, from an experimental comparison between the raw coordinates of the points collected from thecompany mmWave radar and the ground truth provided by an OptiTrack vision system based on calibrated cameras, we observed sudden \"jumps\" in the trajecories estimated by thecompany platform, which in our opinion are not due to the sensor performance, but rather to some bug in the following data processing stage or streaming. Consider that the project was compiled with the 3.2.0.6_AOP version of the SDK running the Industrial Toolbox 4.2.0 as well. No software changes were made by us. We attach some files to let you understand where the problem is. We tracked a person moving in a wide open room with both systems. The plane of motion is labeled in the following as X-Z (X represents the longitudinal direction with respect to the sensor, whereas Z is the trasverse one) The attached files 1.pdf, 2.pdf and movie1.mp4 are the results obtained with the pedestrian moving sideways from right to left (and vice versa) at about 4 meters from the sensor. Figures 4.pdf, 5.pdf, and movie2.mp4 are the results with the pedestrian moving along a diagonal path from the lower left corner to the upper right corner of the test area. In all pictuers, the solid lines represent the reference ground truth motion, whereas the dots are the points measured from the radar. Please neglect the delay between the results obtained with the two platforms that are due to limited synchronization accuracy. From the figures (most notably Figs. 1 and 2) it is quite evident that the sign of measured data suddenly changes. A closer comparison between Figs. 1 and 2 suggests the hypothesis that the measurements related to axes X and Z are periodically swapped. Could you please help us in understanding the reason of such a strange behavior? We insist on the fact that we did not apply any change to the firmware. Thank you in advance and best regards, Alessandro 1.pdf2.pdf4.pdf5.pdf", + "partNumber" : " IWR6843AOPEVM", + "allResponseList" : [ { + "contentId" : "3310911", + "userName" : "Charles Oladimeji", + "rankPoints" : "26350", + "rankName" : "Mastermind", + "date" : "Apr 8, 2020 10:53 PM", + "userId" : "4461477", + "content" : "Hi, I am looking into this and will get back to you with some feedback. BR, Charles O" + }, { + "contentId" : "3311135", + "userName" : "Alessandro Ferrari", + "rankPoints" : "450", + "rankName" : "Intellectual", + "date" : "Apr 9, 2020 5:16 AM", + "userId" : "5769899", + "content" : "Thanks!" + }, { + "contentId" : "3315969", + "userName" : "Charles Oladimeji", + "rankPoints" : "26350", + "rankName" : "Mastermind", + "date" : "Apr 14, 2020 10:47 PM", + "userId" : "4461477", + "content" : "Hi, We have not seen this issue on any of the previous tests. Can you please share the configuration file used? What azimuth resolution are you using? BR, Charles O" + }, { + "contentId" : "3317931", + "userName" : "Alessandro Ferrari", + "rankPoints" : "450", + "rankName" : "Intellectual", + "date" : "Apr 16, 2020 11:58 AM", + "userId" : "5769899", + "content" : "Hi, We used the configuration settings as from the attached file. If you need the .cfg file we can try to recreate it from the attached parameters. ThankYou in advance. BR Alessandro params.pdf" + }, { + "contentId" : "3327534", + "userName" : "Charles Oladimeji", + "rankPoints" : "26350", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 8:45 PM", + "userId" : "4461477", + "content" : "Hi, Can you please repeat your test using the profile_3d.cfg in the SDK demo profiles folder? The demo has been tested before release using this profile without seeing any issues. Can you please confirm if the issue depends on configuration? Can you also try a different scene? BR, Charles O" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR6843AOPEVM" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895325.json b/data/json/DLP/895325.json new file mode 100644 index 0000000000000000000000000000000000000000..685a49a404594052c6c3a889d08a796d761bda09 --- /dev/null +++ b/data/json/DLP/895325.json @@ -0,0 +1,87 @@ +{ + "ticketNumber" : "895325", + "reporterName" : "R D2", + "rankPoints" : "80", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ40Z60EVM-578: Charging with BQ40Z60 does not working", + "rankName" : "Prodigy", + "replies" : " 9", + "views" : " 47", + "queryText" : "Part Number: BQ40Z60EVM-578 Hi there, Steps that i have done: choose the chemID 2059 for INR18650MJ1 configure the \"Data Memory\" run the \"Calibration\" – Current Calibration and Voltage Calibration, Temperature Calibration was not done start a \"Learning Cycle\" DISCHARGING when \"Learning Cycle\" was started -> press GAUGE_EN and RESET at \"Commands\" view, so that QEN = high/red and RDIS = high/red start discharging DC load relaxing after discharging or wait until REST = high/red I'm performing a learning cycle with a batterypack (2S2P of INR18650MJ1 chemid 2059) and it seems that step 4. a. - DISCHARGING was succesfully (but something strange happens – while Discharging NSFM was high/red in IT Status (low) register). Now the learning cycle says \"Charge Mode - Connect charger now.\", so i connect my lab power supply (9V@3,4A) and the message does not changed. Then i'm looked at the \"DashBoard\" and see there is no current flowing. The \"Registers\" view show that the bit ACLW at \"Operation Status A\" Register is high/red. After changing the voltage at 9,7V the bit ACLW at \"Operation Status A\" Register is low/green and the ACFET is high/red, the bit CHGR at \"Charger Status\" register change from low/green to high/red. At the \"Registers\" view i'm observing that the \"AC Adapter voltage\" is 6149mV. 1. Question: What does NSFM or Negative Ra Scale Factor Mode mean? Was step 4. a. successfully? 2. Question: Why the gauge does not charge the batterypack? Is the data memory not configured properly? Could someone help me please? here a screenshot and some data Data-Memory-Config.gg.csv RegisterLogFolder.zip DataMemoryLogFolder.zip kind regards and thanks", + "partNumber" : " BQ40Z60EVM-578", + "allResponseList" : [ { + "contentId" : "3310871", + "userName" : "Dominik Hartl11", + "rankPoints" : "35875", + "rankName" : "Mastermind", + "date" : "Apr 8, 2020 9:45 PM", + "userId" : "9849", + "content" : "Your log file shows that Vacp is erratic when you try to charge. The gauge will only allow charging if Vacp > (vBAT + VacpHysteresis). VacpHysteresis is 0mV by default so you must make sure the Vacp > vBAT and that it stays above vBAT." + }, { + "contentId" : "3310872", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 8, 2020 9:45 PM", + "userId" : "1864278", + "content" : "The learning cycle has two modes, which are Manual Mode or Automation Mode? Have you tried the Manual Mode? Andy" + }, { + "contentId" : "3310933", + "userName" : "R D2", + "rankPoints" : "80", + "rankName" : "Prodigy", + "date" : "Apr 8, 2020 11:38 PM", + "userId" : "6248931", + "content" : "I'm using the manual mode." + }, { + "contentId" : "3311301", + "userName" : "R D2", + "rankPoints" : "80", + "rankName" : "Prodigy", + "date" : "Apr 9, 2020 9:38 AM", + "userId" : "6248931", + "content" : "The erratic voltage is my debt. Should i measure the voltage between VSYS to PGND or between the psu voltage for calibrating the \"Applied Pack Voltage\"? When i'm using the voltage displayed on my psu for calibrating the voltage corresponds to the \"Registers\" view (AC Adapter voltage). When i'm using the voltage between VSYS to PGND the voltage is different from the psu one." + }, { + "contentId" : "3312027", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 9, 2020 9:26 PM", + "userId" : "1864278", + "content" : "See 3.3.1 Voltage Calibration of bq40z60 EVM user's guide. I would suggest you follow the instructions there. Andy" + }, { + "contentId" : "3312710", + "userName" : "R D2", + "rankPoints" : "80", + "rankName" : "Prodigy", + "date" : "Apr 10, 2020 4:09 PM", + "userId" : "6248931", + "content" : "I followed the instructions of the document SLUUB71, but without any successful result. thanks for your response Riccardo" + }, { + "contentId" : "3316399", + "userName" : "R D2", + "rankPoints" : "80", + "rankName" : "Prodigy", + "date" : "Apr 15, 2020 8:32 AM", + "userId" : "6248931", + "content" : "Which register should be set of the gauge, when the gauge is charging? Could I start manually a charging cycle?" + }, { + "contentId" : "3321854", + "userName" : "Dominik Hartl11", + "rankPoints" : "35875", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 7:30 PM", + "userId" : "9849", + "content" : "The gauge indicates with ChargerStatus() CHRG that the charger is enabled. ChargingStatus() gives you clues what is currently happening with the charger. If the AC FET is on and you apply a voltage that is high enough for charging to ACP/VAC and all conditions for charging (CHG FET is on, all protection parameters are ok) then the bq40z60 will charge the cells. There is no need to manually start this." + }, { + "contentId" : "3322524", + "userName" : "R D2", + "rankPoints" : "80", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 8:56 AM", + "userId" : "6248931", + "content" : "Thank you very much for your answer. This does not solve the problem. I have now loaded an old configuration with different parameters and charging works now, but I can not understand why? I have specifically changed the values in \"Advanced Charge Algorithm\" in the subsection \"Voltage Range\" and \"Charger\" and set the bit in SOC Flag Config A & B for TC and FC this seems that does the job. But the termination of the charging process seems not to work correctly and the \"VCT\" bit of the \"Charging Status(low)\" register is not set. It toggles between charge and charging termination. Is that a normal behaviour? The datasheet \"bq40z60 Programmable Battery Pack Manager Technical Reference Manual Literature Number: SLUUA04D\" says that the condition is: All of the following conditions must occur for two consecutive 40-s periods: Charging (that is, BatteryStatus[DSG] = 0) AND AverageCurrent() < Charge Term Taper Current AND Max cell voltage1..4 + Charge Term Voltage ≥ ChargingVoltage() / number of cells in series AND The accumulated change in capacity > 0.25 mAh. Then there is an other problem that in \"Safety Alert C+D(low)\" the OC bit is set. Which parameter is responsible for the \"OC\" bit? Finally, my working configuration for which it is of interest. Data-Memory-Config-working.gg.csv old one: Data-Memory-Config-old.gg.csv" + } ], + "tags" : [ "/support/power-management/f/196/tags/_2300_NSFM", "/support/power-management/f/196/tags/_2300_bq40z60", "/support/power-management/f/196/tags/_2300_Not%2bWorking", "/support/power-management/f/196/tags/_2300_not%2bcharging", "/support/power-management/f/196/tags/BQ40Z60EVM_2D00_578", "/support/power-management/f/196/tags/_2300_learning%2bcycle", "/support/power-management/f/196/tags/_2300_learning", "/support/power-management/f/196/tags/_2300_cycle", "/support/power-management/f/196/tags/bq40z60" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895343.json b/data/json/DLP/895343.json new file mode 100644 index 0000000000000000000000000000000000000000..f0f09f5e9138cbd7843e06f0e7b324ce9976ae0f --- /dev/null +++ b/data/json/DLP/895343.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "895343", + "reporterName" : "Jason Dai", + "rankPoints" : "2790", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS54560: the selection of inductor saturation current", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 16", + "queryText" : "Part Number: TPS54560 Hello E2E, I would like to consult how to correct to select the inductor's saturation current. The OCP of TPS54560 is fixed. Assume the maximum load current is just 1.5A and due to PCB size limitation, could user use the lower saturation current than OCP but higher than maximum current rating? Jason", + "partNumber" : " TPS54560", + "allResponseList" : [ { + "contentId" : "3310556", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 8, 2020 4:14 PM", + "userId" : "1881345", + "content" : "It is always best to design the inductor for the current limit of the device. However, it is OK to use an inductor with a saturation current less than the current limit. Some inductors have a very hard saturation characteristic. That means that the inductance will drop to a very low value when saturation is reached. That kind of inductor should be avoided. Most inductors will exhibit a gradual drop in inductance as saturation is approached. I would use one of these. If you need 1.5A of load, I would look for an inductor rated for at least 2A of rated current. Then find one with the highest saturation current that will fit on your PCB. The larger the current rating, the lower will be the resistance and the better will be your efficiency. If all you need is 1.5A of load, you may want to use a regulator with lower current capability." + }, { + "contentId" : "3327264", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 4:04 PM", + "userId" : "1881345", + "content" : "Hello I will close this post due to inactivity. Thanks" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS54560" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895371.json b/data/json/DLP/895371.json new file mode 100644 index 0000000000000000000000000000000000000000..6bf78b5ed6feb27aec8fdca7f95f1cd57dc8f858 --- /dev/null +++ b/data/json/DLP/895371.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "895371", + "reporterName" : "Gerasimos Maroulis", + "rankPoints" : "60", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC28711: Intermittent operation of Flyback Converter", + "rankName" : "Prodigy", + "replies" : " 5", + "views" : " 24", + "queryText" : "Part Number: UCC28711 Hello, I designed a flyback converter using the UCC28711. The DC input voltage ranges from 150V-1000V. And the output voltage consists of 2 outputs of 17V each. Unfortunately, the circuit does not respond as expected. In particular, the constant voltage regulation does not stop on the desired voltage. Even though, the calculations of Rs1 & Rs2 are correct (the voltage on Vs is 4.05 when the output voltage is 17V), the IC keeps charging the output until 22V, then it stops and when the output discharges to 10V in starts charging again until it reaches 23V. At this point the overvoltage protection is activated and the IC swithces off, until Vdd reaches the Vdd turn-off threshold (8.1V). Then, the process starts again with the aforementioned pattern. Is it possible that the problems occur because the NTC pin is left floating? Can the ripple on the Vauxiliary create confusion to the Vs pin during the sampling time? The following pdf files include the waveforms of the converter: Blue=Vdd pin-Channel A Red=DRV pin-Channel B Green=Vauxiliary-Channel C Yellow=Output Voltage-Channel D The file ti1 presents the waveforms of the above measured signals. At 1.712ms is the point where the IC detects the overvoltage, even though it reaches the desired regulated voltage at 0.462ms The file ti2 presents the same waveforms but zoomed in to the moment where the output voltage reaches 17V. I would liek to hear your opinion regarding the shape of Vauxiliary (Green) and how it can affect the sampling of the Vs pin. ti1.pdfti2.pdf Thanks in advance.", + "partNumber" : " UCC28711", + "allResponseList" : [ { + "contentId" : "3310558", + "userName" : "Eric Faraci", + "rankPoints" : "7685", + "rankName" : "Expert", + "date" : "Apr 8, 2020 4:15 PM", + "userId" : "3729643", + "content" : "Gerasimos If you are not using NTC pin function we recommend to leave it floating as you have already done. If you have not already, we recommend you use the excel design calculator /lit/zip/sluc590 to verify that all the external components in your design are correct. Please note that for VS pin measurement we don't recommend probing the pin directly. We recommend that you measure the aux winding voltage. The parasitic capacitance on a probe can interfere with operation if directly connected to VS pin. From your waveforms it looks like the waveform that the VS pin is measuring looks to be incorrect. The waveform should look like figure 14 (page 13) of the UCC28711 datasheet. The turn on point is not always on the valley as expected, and instead varies from cycle to cycle. Below are a few recommendations to improve VS waveform among others. It is recommended to have <4pF of capacitance on VS pin. Remove any external capacitor if there is one. Verify that the transformer design follows best recommended practice for multiple output, coupling thru - see details in this video /multiple-output-flybacks-how-improve-cross-regulation?context=1134585-1139235-1134623 Verify that layout follows recommendation in section 11.2 (page 25) of the UCC28711 datasheet. If it does not noise can be injected into the key nodes which will interfere with operation. Increase output capacitance - there may be insufficient output capacitance which is causing the output voltage to overshoot Best Regards, Eric" + }, { + "contentId" : "3311254", + "userName" : "Gerasimos Maroulis", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 9, 2020 8:04 AM", + "userId" : "6100209", + "content" : "Dear Eric, Thank you for your quick reply. I do not measure the Vs pin. I measure the Anode of the Auxiliary winding diode (Vauxiliary-Green). In the file ti2.pdf that I sent you can see that there is something weird with the Vauxiliary (Green). In particular, various oscillations take place after the switch-off of the mosfet. Have you ever seen something similar? Best Regards." + }, { + "contentId" : "3313906", + "userName" : "Eric Faraci", + "rankPoints" : "7685", + "rankName" : "Expert", + "date" : "Apr 13, 2020 3:57 PM", + "userId" : "3729643", + "content" : "Gerasimos Thank you for clarifying how you measured VS waveform. Vauxiliary waveform does not look correct. It should look like Figure 14 (page 13) of the UCC28711 datasheet. The turn on point does not track the valley. Typically distortion such as this is caused by excessive leakage inductance in the transformer or layout error that injects excessive noise. If you continue to have issues with your design, we recommend that you use an RCD snubber instead of a Zener clamp (this app note has details on how to design the clamp /lit/an/snva744/snva744.pdf). I recommend you verify your design using the steps I highlighted earlier to identify what is causing this signal to be distorted. If you cannot resolve the issue, please share your schematic and PCB layout. Best Regards, Eric" + }, { + "contentId" : "3318329", + "userName" : "Gerasimos Maroulis", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 16, 2020 5:10 PM", + "userId" : "6100209", + "content" : "Dear Eric, Thank you for your usefull advices so far. I changed the snubber circuit to RC snubber (previously it was Diode-Zener), and there was some progress. Specifically, when I changed the ultrafast diode of the snubber to a standard, the chip stopped guiding the converter to output overvoltage which led to switch-off until the undervoltage lockout of 8V in Vdd and then switching on again through the HV pin. Nevertheless, now I face different problems. In particular, as you can see in the files that I have attached, when the output reaches the desirable limit (18V) the IC stops regulating for a long period. In the meantime the output discharges a lot. Some times it discharges to 16V, others to 13V and some others even lower to 7.68V, without any particular pattern. Have you ever faced a similar problem? The following files include the waveforms : Blue: Vdd Red: IC driver pin (DRV) Green: Voltage on the auxilliary winding, on the anode of the auxiliary winding diode Yellow: Output voltage As you can observe in the first file, the IC sends pulses until the voltage reaches the desirable value of 18V. Then it stops for along period, usually until the voltage goes to 8V. It is clear that the there is no OverVoltage Protection, since the Vdd is not let to discharge until the Undervoltage lockout of 8V, restarting the HV circuit. 4331.ti1.pdf The secomd file presents the same waveforms as the first file, but in more detail, zooming in. 0777.ti2.pdf Thanks in advance for your time and your useful advices." + }, { + "contentId" : "3322697", + "userName" : "Eric Faraci", + "rankPoints" : "7685", + "rankName" : "Expert", + "date" : "Apr 21, 2020 12:18 PM", + "userId" : "3729643", + "content" : "Gerasimos In your zoomed in waveform from the file \"0777.ti2.pdf\" it is not zoomed in enough to verify that the aux winding signal is now correct. In the earlier waveform you shared the turn on point is not always on the valley as expected, and instead varies from cycle to cycle. This is incorrect, it should look like figure 14 (page 13) of the UCC28711 datasheet. If the waveform is incorrect, UCC28711 may think the output voltage is at a different point than it is actually at, which may cause the improper behavior that you are seeing. Another recommendation is to verify that you have sufficient output capacitance. Generally we recommend 100uF/W of capacitance to insure stability Best Regards, Eric" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC28711" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895384.json b/data/json/DLP/895384.json new file mode 100644 index 0000000000000000000000000000000000000000..c8a0004419ea7fb63f4b4b29c245bf7d152c8f68 --- /dev/null +++ b/data/json/DLP/895384.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "895384", + "reporterName" : "Alexander Raisle", + "rankPoints" : "100", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS54160: Desired output voltage not reached at no load", + "rankName" : "Prodigy", + "replies" : " 10", + "views" : " 55", + "queryText" : "Part Number: TPS54160 Hello everybody, i hope this further question will be linked to the original thread. I tried the Additional solutions (1-4) from chapter 4 of the recommended document \"SLVA547A\". I used a Schottky-Diode BAT54. For Solution (3) I tried different capacitors from 100 nF up to 1 uF. But the output voltage still looks like a sawtooth when input voltage is less than about 5 V. So is there another possibility to reach input voltage down to 3.5 V? Best regards, Alexander", + "partNumber" : " TPS54160", + "allResponseList" : [ { + "contentId" : "3310493", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 8, 2020 3:30 PM", + "userId" : "1881345", + "content" : "It may not be possible to get to such a low drop-out with this device. I would suggest using one of our synchronous devices (those without a diode). Those devices will be able to get down to lower input voltages. You might look at LMR33630 or LMR23630 or one of the members of those families." + }, { + "contentId" : "3311259", + "userName" : "Alexander Raisle", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Apr 9, 2020 8:12 AM", + "userId" : "6266955", + "content" : "Hey Frank, thank you for your reply. So the datasheet says that Input Voltage range is from 3.5 V to 60 V. Which conditions are needed to reach 3.5 V input voltage? Best regards, Alexander" + }, { + "contentId" : "3311629", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 9, 2020 3:11 PM", + "userId" : "1881345", + "content" : "That lower voltage in that specification indicates the voltage at which the device will still be switching and will not shut itself off. The higher voltage in that specification indicates the voltage at which the device will be switching and will not be damaged. The specification does not imply that every application will run satisfactorily within that entire range. As an example, if you were to convert from 36Vin to 1Vout, most devices would either automatically reduce the switching frequency or skip pulses to remain in regulation. The data sheet of any given device will explain the limitations for a particular input, output and load combination." + }, { + "contentId" : "3315116", + "userName" : "Alexander Raisle", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Apr 14, 2020 11:05 AM", + "userId" : "6266955", + "content" : "Hello Frank, would you please be so kind and tell me where I can find this explanation in the datasheet. So far I didn´t understand which specific factor is responsible that the actual design is not working. Figure 26 describes the minimum current needed to Start which is about 6 mA at 4V. But I cannot get lower than 4.9 V. The actual design needs output current of minimum 35 mA (intense oscillation) in case of failure. Best regards, Alexander" + }, { + "contentId" : "3315399", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 14, 2020 2:59 PM", + "userId" : "1881345", + "content" : "Hello When converting from 3.5Vin to 3.3Vout, the device is in drop-out mode. In this mode the duty cycle = D = Vout/Vin is about 0.94; or very close to 1. Under these conditions the parameters of interest are the \"maximum duty cycle\" or sometimes called the \"maximum on-time\" or \"minimum off-time\". With our older devices, these specifications are sometimes not included in the data sheet; such as the TPS54160. Most of our newer devices will include these specifications to make it easier to determine the drop-out behavior. You can approximate the minimum input voltage by: Vin=Vout/Dmax. Where Dmax will come from the data sheet or Dmax=Tonmax*Frequency; where Tonmax also comes from the data sheet. The minimum input voltage will also depend on the load and the resistance of the inductor and of the MOSFET switches. Of course the minimum input voltage can not be lower than the minimum input voltage specification in the \"operating conditions\" of the data sheet. I can provide a spread sheet that will help to calculate the minimum input voltage for a given device and operating conditions if you wish. Thanks" + }, { + "contentId" : "3316295", + "userName" : "Alexander Raisle", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Apr 15, 2020 6:38 AM", + "userId" : "6266955", + "content" : "Hello Frank, thank you for the explanation. Would you please send me the spread sheet to calculate minimum input voltage? Best regards, Alexander" + }, { + "contentId" : "3316998", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 15, 2020 4:51 PM", + "userId" : "1881345", + "content" : "Hello I have attached. Please keep in mind that the calculations are approximate. The best way to ensure that you get the performance you need is by testing. Thanks 8004.Drop_out_calc_revA.xlsx" + }, { + "contentId" : "3317898", + "userName" : "Alexander Raisle", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Apr 16, 2020 11:16 AM", + "userId" : "6266955", + "content" : "Thanks for the document. The regulator can provide 100% duty cycle, but when Vin is below 5V, the voltage at Boot-Capacitor still looks like the voltage in attached picture. Due to the calculation sheet, the 3.5 V input voltage are possible (Drop-out voltage = 0,2 V). I cannot find the parameter \"Toffmin\" in the datasheet, so I used D = 1. Is there anything else what we can do or check to get this regulator working below 5V Vin?" + }, { + "contentId" : "3318213", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 16, 2020 3:26 PM", + "userId" : "1881345", + "content" : "Hello Since the regulator you are using has a diode, it will be very difficult to get to near 100% duty cycle. As mentioned previously, I would choose a synchronous type of regulator that can get closer to 100% duty for improved drop-out performance. Thanks" + }, { + "contentId" : "3325020", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 12:19 AM", + "userId" : "1881345", + "content" : "Hello I will close this post due to inactivity. Thanks" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS54160" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895427.json b/data/json/DLP/895427.json new file mode 100644 index 0000000000000000000000000000000000000000..70ebc0b2f48499e53efcf9871853ae58dcad62ae --- /dev/null +++ b/data/json/DLP/895427.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "895427", + "reporterName" : "Charlie Slee", + "rankPoints" : "30", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM25576: Unable to change output voltage regardless of feedback", + "rankName" : "Prodigy", + "replies" : " 6", + "views" : " 27", + "queryText" : "Part Number: LM25576 Hello, I am trying to adjust the output voltage of the LM25576, circuit attached. It runs off +/-16V, and boosts up to a high voltage, however the regulator main output needs to be 12V Unfortunately the output is fixed to around 5.6-5.9V no matter how much I change the feedback voltage divider. HV SMPS0.4.pdf Have I done something stupid? Thanks in advance Charlie", + "partNumber" : " LM25576", + "allResponseList" : [ { + "contentId" : "3310694", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 8, 2020 6:09 PM", + "userId" : "1881345", + "content" : "It looks like you are trying to convert +16V to a -16V using the LM25576 as an inverting buck boost; true? You also have some kind of charge pump on the switch. Your FB divder is set to give an output of 6.95V=1.22*(1+4.7K/1k) You will need 16V=1.22(1+12.1K/1k)" + }, { + "contentId" : "3310701", + "userName" : "Charlie Slee", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 8, 2020 6:16 PM", + "userId" : "6320896", + "content" : "Hello, Sorry the schematic was not very well labelled. The regulator is referenced to -16V, so I am trying to get -4V from +16V (+12V referenced to -16V). The attached was my original design that I used to make 6V output, but just wanted to increase this. The circuit off the switch creates a HV 1mA supply for a tube. However, no matter what feedback resistor I put into the circuit, the regulator output is always around 5.5-6V. I tried values all the way up to 20K and there was no change. I guess if there is nothing essentially wrong with the topology I must have done something wrong with the build or PCB...? Thanks for your help." + }, { + "contentId" : "3310734", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 8, 2020 6:51 PM", + "userId" : "1881345", + "content" : "I would double check you values with the calculator tool on thecompany website. And also check your PCB layout. If you are still having trouble you could temporarily disconnect the charge pump and see if that changes anything." + }, { + "contentId" : "3327274", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 4:08 PM", + "userId" : "1881345", + "content" : "Hello I am closing this post due to inactivity. Thanks" + }, { + "contentId" : "3327341", + "userName" : "Charlie Slee", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 5:03 PM", + "userId" : "6320896", + "content" : "Hello, The issue was with my build. I used a 1000uF cap instead of the 470uF I planned to as the initial load of the regulator. I checked in the datasheet and didn't see anything about a maximum load capacitance, did I miss something? Thanks for your help" + }, { + "contentId" : "3327464", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 6:57 PM", + "userId" : "1881345", + "content" : "Hello Thanks for the update. I don't think that the maximum output capacitance is explicitly stated in the data sheet. However, 1000uF is a bit large for most DC/DC converters. Thanks" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM25576" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895479.json b/data/json/DLP/895479.json new file mode 100644 index 0000000000000000000000000000000000000000..64e765ea49df9e0da048ab2e72de38c0264f84e5 --- /dev/null +++ b/data/json/DLP/895479.json @@ -0,0 +1,79 @@ +{ + "ticketNumber" : "895479", + "reporterName" : "Qiuyue Xue", + "rankPoints" : "45", + "resolutionStatus" : "", + "ticketName" : "IWR6843AOPEVM: Running Vital SIgn Demo on IWR6843AOPEVM but it doesn't capture data", + "rankName" : "Prodigy", + "replies" : " 8", + "views" : " 108", + "queryText" : "Part Number: IWR6843AOPEVM Hi, I'm using IWR6843 https://www.mistralsolutions.com/product-engineering-services/products/som-modules/60ghz-industrial-mmwave-radar-module/ and I'm trying to get it work with the Vital Sign Demo in the mmWave industrial toolbox 4.2.1, however, when I run the default demo GUI, it doesn't show any plot and the detected ports are wrong(it should be COM4 and COM5): So I tried changing the GUI source code and setting the default port to be COM4 and COM5, however, it still doesn't show any plot, the results are shown as below: I then also tried capturing data through the GUI and the recorded data file is empty, so I guess it's some setup errors... I have set the board correctly(both SOP1 and SOP2 are at \"off\") and it can run the out-of-box demo, I have tried flashing the board with vital_signs_demo_68xx.bin and vital_signs_demo_68xx_aop.bin and none of them worked. Does anyone know why and how could I fix this? Thanks for your help! Shirley", + "partNumber" : " IWR6843AOPEVM", + "allResponseList" : [ { + "contentId" : "3311840", + "userName" : "Nitin Sakhuja", + "rankPoints" : "21705", + "rankName" : "Mastermind", + "date" : "Apr 9, 2020 5:42 PM", + "userId" : "1602842", + "content" : "HI Shirley, Could you please try the following to help debug the problem? 1. Is the Mistral module mounted on the MMWAVEICBOOST carrier card in the setup? Please share pictures of your complete board setup. 2. Have the Vital signs demo flashed. 3. Apply power and press the NRST switch on the Carrier card to reset the EVM. 4. Instead of using the GUI, connect Tera Term to the Control UART using the settings shown below (press enter a couple of times to make sure that you see the mmw demo prompt on the control UART port in Tera Term. 5. Send the configuration commands in the provided .cfg file (C:\\ti\\mmwave_industrial_toolbox_4_2_1\\labs\\vital_signs\\68xx_vital_signs\\gui\\profiles\\xwr1642_profile_VitalSigns_20fps_Front.cfg) one by one 6. Open another Tera Term Window and connect the Data UART using 921600 bps speed (keep all other settings the same as control UART). 7. Do you see any data coming out (it won'be human readable) on the Data UART? Thanks -Nitin" + }, { + "contentId" : "3311976", + "userName" : "Qiuyue Xue", + "rankPoints" : "45", + "rankName" : "Prodigy", + "date" : "Apr 9, 2020 8:01 PM", + "userId" : "6320962", + "content" : "Hi Nitin, Thanks for the reply! 1. I don't have a MMWAVEICBOOST carrier, is it required to run the vital sign demo? I can run the demo visualizer(/gallery/view/mmwave/mmWave_Demo_Visualizer/ver/3.3.0/) without a MMWAVEICBOOST board. The setup I'm using is shown as below: 2.I tried to use Tera Term to connect to the board,the control port is COM4 for me so I set it as COM4 instead of COM3 in your setup, and here is the commands: I opened another Tera Term window and checked Data UART(COM5) and nothing showed up. Do you have any ideas on how do I debug this or is it just because Vital sign demo requires a boost carrier? Thanks and I appreciate your help! Best, Shirley" + }, { + "contentId" : "3317210", + "userName" : "Nitin Sakhuja", + "rankPoints" : "21705", + "rankName" : "Mastermind", + "date" : "Apr 15, 2020 8:00 PM", + "userId" : "1602842", + "content" : "Hi Shirley, Thanks for providing this information. The TeraTerm log shows that the demo failed because of an exception in file mss_main.c at line 635. Did you make sure to Power cycle and Reset the EVM before starting the Vital Signs Demo? Regards -Nitin" + }, { + "contentId" : "3320129", + "userName" : "Qiuyue Xue", + "rankPoints" : "45", + "rankName" : "Prodigy", + "date" : "Apr 18, 2020 12:59 AM", + "userId" : "6320962", + "content" : "Hi Nitin, Thanks for the reply! Yes I did power cycle it every time and reset the EVM, I have tried flash the vital_signs_demo_68xx_aop.bin and vital_signs_demo_68xx.bin, and both gave me the same errors. Also there is another error when I send CalibDCRangeSig command, so that's probably a reason too. Do you have any idea why this is happening or how to fix this, thanks! Shirley" + }, { + "contentId" : "3321908", + "userName" : "Nitin Sakhuja", + "rankPoints" : "21705", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 8:07 PM", + "userId" : "1602842", + "content" : "HI Shirley, We will need to run the demo in CCS debug mode to understand what's going on. The instructions to run the demo in CCS debug mode are available in the user guide section 4. Execute the lab under \"Expand for help with Debug mode\". You'll need to click on this item to open the debug instructions. Please run the demo in debug mode and look at the CCS console log (and provide snapshot) for any errors. Regards -Nitin" + }, { + "contentId" : "3321932", + "userName" : "Qiuyue Xue", + "rankPoints" : "45", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 8:33 PM", + "userId" : "6320962", + "content" : "Hi Nitin, Thanks for the reply! I'll dig into CCS debug and let you know the results. Thanks! Shirley" + }, { + "contentId" : "3327887", + "userName" : "Arun MP", + "rankPoints" : "295", + "rankName" : "Intellectual", + "date" : "Apr 25, 2020 6:27 PM", + "userId" : "5986509", + "content" : "Hi Nitin, As per the above Tera Term log, the sensor is not started, throws Error -1. I'm also getting the same issue. Can you please share the configuration which is used for initial start of the sensor in vital sign demo? Thanks Arun" + }, { + "contentId" : "3329713", + "userName" : "Nitin Sakhuja", + "rankPoints" : "21705", + "rankName" : "Mastermind", + "date" : "Apr 28, 2020 1:24 AM", + "userId" : "1602842", + "content" : "Hi Arun, The configuration is available in the following directory: C:\\ti\\mmwave_industrial_toolbox_4_2_1\\labs\\vital_signs\\68xx_vital_signs\\gui\\profiles\\xwr1642_profile_VitalSigns_20fps_Front.cfg Regards -Nitin" + } ], + "tags" : [ "/support/sensors/f/1023/tags/vital_5F00_sign_5F00_lab", "/support/sensors/f/1023/tags/IWR6843", "/support/sensors/f/1023/tags/IWR6843AOPEVM" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895515.json b/data/json/DLP/895515.json new file mode 100644 index 0000000000000000000000000000000000000000..60a41fa3e435a38e876ec31a2d68639d2df986c4 --- /dev/null +++ b/data/json/DLP/895515.json @@ -0,0 +1,87 @@ +{ + "ticketNumber" : "895515", + "reporterName" : "Jay Yeh", + "rankPoints" : "425", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "Suggestion on dual power source design", + "rankName" : "Intellectual", + "replies" : " 9", + "views" : " 113", + "queryText" : "Hi I am now developing a system as the following figure, and the slave device part is what I am doing right now. The slave device has a battery and could operate as a standalone device on its own. The load electronics(MCU, Sensor, etc.) need 3.3v and 5v, so I use two regulators to have these two voltage supply. The slave device could also connect to a host device. With different host devices, the host device could possibly provide 3v or 5v. I would like to use the power provided by the host device while connected to share the current of the load system to extend the battery life of the slave device. Could I naively connect the outputs of TPS63030 and TPS62291 together? Thanks in advance.", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3311561", + "userName" : "Milos", + "rankPoints" : "7260", + "rankName" : "Expert", + "date" : "Apr 9, 2020 2:20 PM", + "userId" : "5692358", + "content" : "Hi Jay, I would not recommend it, since both devices can sink the output current and operate in reverse, if they start fighting for control. The safest way would be to add ideal diodes. Or a switch on the TPS62291 output at least. When disabled, the TPS63030 disconnects the output from the input, which might not be the case for the TPS62291. Best regards, Milos" + }, { + "contentId" : "3312233", + "userName" : "Jay Yeh", + "rankPoints" : "425", + "rankName" : "Intellectual", + "date" : "Apr 10, 2020 3:17 AM", + "userId" : "1630590", + "content" : "Hi Milos, I added two LM66100 to the power block as the following figure: Does it inline with what you suggested? Will the output of two LM66100 still be 3.3V? Would it effectively share the current load between the two 3.3v supply? Thanks a lot." + }, { + "contentId" : "3314376", + "userName" : "Timothy Logan", + "rankPoints" : "5600", + "rankName" : "Expert", + "date" : "Apr 13, 2020 9:12 PM", + "userId" : "1849899", + "content" : "Milos, Generally it is not advised to use the LM66100 in a dual ORing configuration like then when both of the supply voltages are the same. The LM66100 is a make-before-break topology so if both supply voltages are the same there is a chance that the outputs will switch rapidly or both will be off. In this use case a power mux like the TPS2121 in a seamless switchover mode would likely be the better fit. See the below diagram taken from the datasheet: There is also a really goodcompany design that explains a good switchover example similar to your scenario .cn/cn/lit/ug/tidue50/tidue50.pdf" + }, { + "contentId" : "3314393", + "userName" : "Milos", + "rankPoints" : "7260", + "rankName" : "Expert", + "date" : "Apr 13, 2020 9:24 PM", + "userId" : "5692358", + "content" : "Hi Timothy, Thank you for the correction! Best regards, Milos" + }, { + "contentId" : "3314805", + "userName" : "Tanvee", + "rankPoints" : "2555", + "rankName" : "Intellectual", + "date" : "Apr 14, 2020 6:15 AM", + "userId" : "5332788", + "content" : "Hi Milos, Yes, the TPS62291 device does not have a reverse current protection feature. The simple diode will help to protect to eliminate the reverse current here. Best regards, Tanvee" + }, { + "contentId" : "3316142", + "userName" : "Jay Yeh", + "rankPoints" : "425", + "rankName" : "Intellectual", + "date" : "Apr 15, 2020 3:21 AM", + "userId" : "1630590", + "content" : "Hi Timothy, Thanks for sharing the solution. One little question that TPS2121 is a power mux, it should only use one input source at a time. Will it help to balance and share the current load between two input sources? Thanks in advance." + }, { + "contentId" : "3320072", + "userName" : "Timothy Logan", + "rankPoints" : "5600", + "rankName" : "Expert", + "date" : "Apr 17, 2020 10:41 PM", + "userId" : "1849899", + "content" : "Jay Yeh, Maybe I am misunderstanding the application here- however the way the LM66100s are setup in the original diagram was an ORing configuration where only one supply was present at a time. The TPS2121 will be a similar operation where there is one primary supply and then the other auxillary supply is switched to once the primary supply falls below a certain voltage range. No supply balancing is done here." + }, { + "contentId" : "3322442", + "userName" : "Jay Yeh", + "rankPoints" : "425", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 7:20 AM", + "userId" : "1630590", + "content" : "Hi Timothy, Any suggestion on the system design if the goal is to have load sharing? Thanks in advance." + }, { + "contentId" : "3327594", + "userName" : "Timothy Logan", + "rankPoints" : "5600", + "rankName" : "Expert", + "date" : "Apr 24, 2020 9:52 PM", + "userId" : "1849899", + "content" : "Jay Yeh, I have moved this over to the load sharing forum and one of the engineers that work on our load sharing controllers may be able to give a suggestion." + } ], + "tags" : [ "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2bregulator%2boutputs", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2bHardware%2bproblem", "/support/power-management/f/196/tags/TPS62291", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2bDC_2F00_DCconverter", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2bImplementation", "/support/power-management/f/196/tags/TPS63030" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895593.json b/data/json/DLP/895593.json new file mode 100644 index 0000000000000000000000000000000000000000..5a0198079cd89cc9191562e017b17f018a782e1f --- /dev/null +++ b/data/json/DLP/895593.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "895593", + "reporterName" : "Dieter Dornberger1", + "rankPoints" : "110", + "resolutionStatus" : "Resolved", + "ticketName" : "TPSM53602: Output voltage 1.1V or 1.2V", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 25", + "queryText" : "Part Number: TPSM53602 Hi team, I get a WEBENCH alert at following configuration: Vin 4.1V -5.5V Vout 1.2V (or 1.1V) Iout 1A WEBENCH Power Designer reports:The TPSM53602 device may not be stable when operating under PFM Mode With Iout = 2A: I get the WEBENCH message that the design cannot be created: Your preferred device does not work with the inputs you selected. This design is not stable due phase margin either smaller than 35 or greater than 120. But according to the data sheet, this configuration should work, right? (With TPSM53603 I get the same messages) Best Regards", + "partNumber" : " TPSM53602", + "allResponseList" : [ { + "contentId" : "3311834", + "userName" : "Jimmy Hua", + "rankPoints" : "17640", + "rankName" : "Genius", + "date" : "Apr 9, 2020 5:39 PM", + "userId" : "4798049", + "content" : "Hi Dieter, The datasheet has lab measurements using the EVM for 5V input / 1V output. In your design conditions you are running between 4.1V - 5V. If you were to change the Vin_min and Vin_max to 5V - 5.5V the simulation will converge with a stable design. Again these simulation are based on calculated and theoretical values. I would suggest taking a TPSM53602EVM and testing for your application. It may turn out that at such a low output voltage, you will have large output capacitance that will result in a lower cross-over frequency and PM below standard 45-50. An alternative power module that can meet your requirement is the TPSM82822 and the TPSM82084. Regards, Jimmy" + }, { + "contentId" : "3323895", + "userName" : "Dieter Dornberger1", + "rankPoints" : "110", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 7:07 AM", + "userId" : "4021681", + "content" : "Hi Jimmy, we start our design with TPS82085 Thanks & Regards Dieter" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPSM53603", "/support/power-management/f/196/tags/TPSM53602" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895597.json b/data/json/DLP/895597.json new file mode 100644 index 0000000000000000000000000000000000000000..0cb35c885226a9bd1586788f00c7b25a6be32039 --- /dev/null +++ b/data/json/DLP/895597.json @@ -0,0 +1,87 @@ +{ + "ticketNumber" : "895597", + "reporterName" : "Reza sD", + "rankPoints" : "100", + "resolutionStatus" : "Resolved", + "ticketName" : "LM2576HV: High spark with high voltage IC-LM2576HV", + "rankName" : "Prodigy", + "replies" : " 9", + "views" : " 84", + "queryText" : "Part Number: LM2576HV High spark with high voltage IC-LM2576HV Hi I use a LM2576HV IC at an input voltage of up to 60 volts, a output of 5 volts and 1 amp. Output capacitor 470uf, input capacitors 100uf, inductor 100uh and 3amp schattky diode. When I connect voltages above 50 volts to the input, it ignites for a moment, drawing a high instantaneous current from the power supply. With load or without load. What do you think I should do to reduce the first time spark? To test the capacitor, I reduced the input to 22uf, but with a 55V connection to the input of the IC, the water burned LM2576HV. Is it okay to put one series inductor in the entrance? How much should it be?", + "partNumber" : " LM2576HV", + "allResponseList" : [ { + "contentId" : "3311510", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 9, 2020 1:43 PM", + "userId" : "3498075", + "content" : "Hi Reza, Pls upload your circuit and PCB layout for more detail checking. B R Andy" + }, { + "contentId" : "3314588", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 14, 2020 1:58 AM", + "userId" : "3498075", + "content" : "Hi Reza, How about your application issue? Pls upload circuit and PCB layout for more detail checking if problem still existing. B R Andy" + }, { + "contentId" : "3316270", + "userName" : "Reza sD", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Apr 15, 2020 6:08 AM", + "userId" : "3763338", + "content" : "schematic and pcb of my converter Reza sD Part Number: LM2576HV High spark with high voltage IC-LM2576HV Hi I use a LM2576HV IC at an input voltage of up to 60 volts, a output of 5 volts and 1 amp. Output capacitor 470uf, input capacitors 100uf, inductor 100uh and 3amp schattky diode. When I connect voltages above 50 volts to the input, it ignites for a moment, drawing a high instantaneous current from the power supply. With load or without load. What do you think I should do to reduce the first time spark? To test the capacitor, I reduced the input to 22uf, but with a 55V connection to the input of the IC, the water burned LM2576HV. Is it okay to put one series inductor in the entrance? How much should it be?" + }, { + "contentId" : "3316277", + "userName" : "Reza sD", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Apr 15, 2020 6:14 AM", + "userId" : "3763338", + "content" : "We added schaemtic and pcb photos. Please help Our problem was not resolved" + }, { + "contentId" : "3317789", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 16, 2020 9:10 AM", + "userId" : "3498075", + "content" : "Hi Reza, Per data sheet Fig24, the inductor should be H330 for 50V to 5V/1A. so please try 330uH 3A choke in your application. Another issue is D3 position, pls change it as below:" + }, { + "contentId" : "3317956", + "userName" : "Reza sD", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Apr 16, 2020 12:29 PM", + "userId" : "3763338", + "content" : "Hello Thanks for your reply Yes we change location of schottky diode. but for choke L; if we use a voltage input lower than 50v, 330uh is not a problems? for example, we connect 24v or 48v or 55v for Vin." + }, { + "contentId" : "3320646", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 20, 2020 2:43 AM", + "userId" : "3498075", + "content" : "Hi Reza, 330uH also can be used for Vin below 50V. Pay attention on inductor saturation current B R Andy" + }, { + "contentId" : "3320707", + "userName" : "Reza sD", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 4:09 AM", + "userId" : "3763338", + "content" : "Hello We test with 330uH. Then we announce the result. Is it true that the larger the inductance L in a step down converter, the better? But the problem is to increase the inductor resistance, increase the dimensions of the inductor and reduce its saturation current?" + }, { + "contentId" : "3322243", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 21, 2020 3:21 AM", + "userId" : "3498075", + "content" : "Hi Reza, You have right sense on inductor size, we normally suggest 20%--40% inductor ripple current in buck application to balance inductor size and output ripple. the inductor current ripple is 23% for 24V to 5V/1A at 52KHz, B R Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM2576HV" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895626.json b/data/json/DLP/895626.json new file mode 100644 index 0000000000000000000000000000000000000000..7955ab0b2e6d5f6c557b73ab5d945d9b1f4e9fee --- /dev/null +++ b/data/json/DLP/895626.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "895626", + "reporterName" : "user6318437", + "rankPoints" : "40", + "resolutionStatus" : "", + "ticketName" : "TL494: Is Type II or Type III compensation needed for TL494 buck converter?", + "rankName" : "Prodigy", + "replies" : " 5", + "views" : " 118", + "queryText" : "Part Number: TL494 There is not a type II or Type III compensation in the reference design of buck converter in TL494 datasheet. Does this mean that the type II or Type III compensation is not needed for TL494 buck converter? It is known that there is a large phase shifting in the LC filter stage. So the loop is unstable and a type II or type III compensation is needed in DC/DC converter usually. If the type II or type III compensation is not needed for TL494 buck converter, how to keep loop stable? If it is needed, how to design the loop?", + "partNumber" : " TL494", + "allResponseList" : [ { + "contentId" : "3312243", + "userName" : "Teng Feng", + "rankPoints" : "9390", + "rankName" : "Genius", + "date" : "Apr 10, 2020 3:47 AM", + "userId" : "5617595", + "content" : "Hello, In this application, modulation of output pulses is accomplished by comparing the sawtooth waveform created by the internal oscillator on the timing capacitor (CT) to either of two control signals present at the output of the error amplifier. Since the slope of sawtooth waveform is the charging current of the oscillator, the inductance is no longer in the regulation of the transfer function actually, therefore it doesn't exist the double poles of LC, compensation becomes easier and response of loop becomes faster. Regards, Teng" + }, { + "contentId" : "3312312", + "userName" : "user6318437", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 10, 2020 6:04 AM", + "userId" : "6318437", + "content" : "Hi, Thanks very much for your reply. \"Since the slope of sawtooth waveform is the charging current of the oscillator, the inductance is no longer in the regulation of the transfer function actually\" There is a little difficulties for me to understand. To understand it, what document/article/book do I need to read? Can you give me some suggestions? Or can I understand it as fllow: The extra compensation is not needed for PWM mode DCDC. And extra compensation may be used for other mode DCDC? Best regards" + }, { + "contentId" : "3317772", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Apr 16, 2020 8:50 AM", + "userId" : "1139254", + "content" : "Hi, Please go to thecompany Power design Seminars on where you will find many papers on power supply design include a number on control loop compensation. Regards Peter" + }, { + "contentId" : "3321487", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 3:29 PM", + "userId" : "1139254", + "content" : "Hi Let me be a little bit more specific in my guidance to the correct paper. This paper covers voltage mode and current mode control and the types of compensation circuits. Regards Peter" + }, { + "contentId" : "3326513", + "userName" : "user6318437", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 2:03 AM", + "userId" : "6318437", + "content" : "It seems that this doc introduced how to design a stable loop of DCDC. What I want is: What kind of DCDC needs an extra compensation(e.g. type II or type III)? What kind of DCDC does not need an extra compensation? And why? It seems the answers of these questions can not be found in the doc." + } ], + "tags" : [ "/support/power-management/f/196/tags/TL494" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895632.json b/data/json/DLP/895632.json new file mode 100644 index 0000000000000000000000000000000000000000..b23379996c4e5be28b95398b4c69fe842ec7ebc4 --- /dev/null +++ b/data/json/DLP/895632.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "895632", + "reporterName" : "Tina hsieh", + "rankPoints" : "90", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCD3138: Question of PMBUS with ACK and clock stretching", + "rankName" : "Prodigy", + "replies" : " 10", + "views" : " 59", + "queryText" : "Part Number: UCD3138 Hicompany experts, I use UCD3138 test PMBUS write with microchip pickit serial analyzer. UCD3138 is slave, microchip pickit serial analyzer is master. I found if UCD3138 pull low clock before the ACK, the ACK clock is short. This condition only happened at every 4 byte(Not including address). please see the waveform as below, ex: write data [S_][B6][48][D0][39][4D][2E][53][41][30][35][P_] So I want to implement that UCD3138 don't pull low clock before the ACK, how can I do? And I want to implement PMBUS with interrupt, how to configure the register and firmware? Thanks!", + "partNumber" : " UCD3138", + "allResponseList" : [ { + "contentId" : "3311595", + "userName" : "Ian Bower", + "rankPoints" : "9985", + "rankName" : "Genius", + "date" : "Apr 9, 2020 2:47 PM", + "userId" : "178868", + "content" : "It's very difficult to prevent some clock stretching. The stretch is caused by the hardware waiting for the firmware to take the data from the receive buffer and ACK it. You only have half a PMBus clock cycle to respond, if you want to do so. I can't really tell what your clock frequency is - can you tell me what the time scale is on the zoomed in screen? At 100 kHz, you only have 5 microseconds. At 400 kHz, you only have 1.25 microseconds. With the need to have fast interrupts for other things, this means that you really can't avoid at least some clock stretching. Most micro controller systems have to have clock stretching. It doesn't seem to cause any issues with the communication anyway. I think that the short clock is something caused by the way the Microchip handles the clock, since the UCD releases the clock when it gets the ACK from the firmware. Without knowing the PMBus clock speed and the Microchip requirements, it's hard for me to say whether the short clock is dangerous or not. One thing I would suggest is using a pull up resistor of about 1.5 Kohm. Your rising edges look like they may be a little slow. We have found that a 1.5 kOhm resistor is good for protecting the PMBus from noise and other issues." + }, { + "contentId" : "3312250", + "userName" : "Tina hsieh", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 10, 2020 4:00 AM", + "userId" : "4542606", + "content" : "Hi Ian, Thank you for supporting. The clock is 100KHz. I think to configure the fast interrupt with trigger DATA_RDY to take the data from the receive buffer to reduce the clock stretching, is the method possible to implement? Thanks!" + }, { + "contentId" : "3312638", + "userName" : "Ian Bower", + "rankPoints" : "9985", + "rankName" : "Genius", + "date" : "Apr 10, 2020 2:32 PM", + "userId" : "178868", + "content" : "Tina, if you can dedicate the fast interrupt to PMBus only, you still may not be able to avoid the clock stretching entirely. And you will sometimes slow down the standard interrupt response, especially if there are things which are called by the PMBus function that are complicated. The PMBus functions are not written to go into the fast interrupt, and it would be relatively difficult to put them there. To try to make if fast enough, you will need to precalculate all monitoring information, and have the fast interrupt just return the pre-calculated values. You may also need to take all commands that change things in the UCD and put their code in a state machine in background, with the PMBus fast interrupt just setting a bit and storing information to tell the background what to do. If you are using the fast interrupt for other things, it won't be interruptible, so in that case you will still get clock stretching whenever the PMBus occurs with the fast interrupt. Also note that our PMBus functions are not designed to work from interrupt, so there may be issues if you use the PMBus interrupt to generate the fast interrupt. In addition, adding any additional interrupt function adds to the possibility of having broken writes and other asynchronous conflicts between the different interrupt levels. These are very hard to test for, and very hard to debug, as they only occur when two levels of code interact at exactly the wrong point in time. The interrupt has to occur while the lower priority task is in the middle of modifying the same thing. Unless there is a real problem with clock stretching, we do not recommend an interrupt driven PMBus. It doesn't seem that there is a real problem." + }, { + "contentId" : "3313405", + "userName" : "Tina hsieh", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 13, 2020 7:35 AM", + "userId" : "4542606", + "content" : "Hi Ian, I only use PMBus interrupt in boot code, so I don't need other standard interrupt and other fast interrupt. I use the microchip pickit serial analyzer to test pmbus wirte that cause SDA timeout because the ACK clock is short. See the waveform as below, CH1: Master SDA, CH2: Master SCL, CH3: UCD3138 SCL I know that the short clock is caused by the way the Microchip handles the clock, but I need to use the microchip pickit serial analyzer to implement firmware upgrades. I configure the PMBus interrupt, but it isn't interruptible. Where do I ignore? What register is PMBus interrupt flag? And how to use the PMBus interrupt flag to enable and clear the PMBus interrupt? Thanks!" + }, { + "contentId" : "3314469", + "userName" : "Ian Bower", + "rankPoints" : "9985", + "rankName" : "Genius", + "date" : "Apr 13, 2020 11:36 PM", + "userId" : "178868", + "content" : "Tina, I'm not sure what's going on there. What address are you using for the UCD. Make sure that you don't use address 0xFF, that can cause problems somtimes, and it's not permitted under PMBus. If you really want to use interrupts for PMBus, you need to look at the UCD3138 Technical Reference Manual in the PMBus section. You'll see the PMBINTM register where you can enable the interrupts." + }, { + "contentId" : "3316132", + "userName" : "Tina hsieh", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 15, 2020 3:06 AM", + "userId" : "4542606", + "content" : "Hi Ian, I want to use fast interrupt in boot code, but I can't implement. I find the boot sample code load_64.asm is different with the AP code. I think I can't implement fast interrupt in boot code because load_64.asm don't configure fast interrupt. How can I configure the boot code? Thanks! d1d4 boot flash 001.zip" + }, { + "contentId" : "3316721", + "userName" : "Ian Bower", + "rankPoints" : "9985", + "rankName" : "Genius", + "date" : "Apr 15, 2020 1:41 PM", + "userId" : "178868", + "content" : "The only thing the load.asm does is to link the vector for the fast interrupt to the fast interrupt function. But that is going to be a problem for you. Because the boot flash normally links the fast interrupt to the fast interrupt in the main program. .sect \".vectors\" .state32 B c_int00 B vec_2 B vec_3 B vec_4 B vec_5 B vec_6 B vec_7 B vec_8 The normal load.asm links to the fast interrupt directly: .sect \".vectors\" .state32 B c_int00 B _undefined_instruction_exception B _software_interrupt B _abort_prefetch_exception B _abort_data_fetch_exception B _abort_prefetch_exception B _standard_interrupt B _fast_interrupt So you'll have to put the branch to fast interrupt in the boot vectors. Which means that the fast interrupt will have to go into the boot area as well. but you still need to support the fast interrupt in the main program as well. So you really need to vector to a location which has a RAM vector which you load to branch either to the fast interrupt in the boot flash, or to vec8. This will slow down your fast interrupt. I know that you are seeing the issue after a clock stretch, but I'm still not convinced that this is the root cause. i would suggest that you put in a low value resistor, maybe a 100 ohm, in the data and clock lines between the two chips. That way you can tell which device is pulling the line down. Also, please try 1.5 Kohm pullups as well. What pullup resistor are you using now?" + }, { + "contentId" : "3317509", + "userName" : "Tina hsieh", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 16, 2020 2:58 AM", + "userId" : "4542606", + "content" : "Hi Ian, Thank you for supporting. The pullup resistor is 10 Kohm. I try 4.75 Kohm that can improve. But the pullup resistor 10 Kohm is defined by our customer, I can't change the pullup resistor." + }, { + "contentId" : "3317570", + "userName" : "Ian Bower", + "rankPoints" : "9985", + "rankName" : "Genius", + "date" : "Apr 16, 2020 4:16 AM", + "userId" : "178868", + "content" : "Tina, the UCD will definitely not work with a 10 K Ohm resistor. We recommend at least down to 1.5 Kohm. 10K may work with some devices, under some conditions, but for reliable operation under all conditions, and with all UCD devices we recommend a lower value. It cannot be solved with fast interrupt." + }, { + "contentId" : "3323085", + "userName" : "Ian Bower", + "rankPoints" : "9985", + "rankName" : "Genius", + "date" : "Apr 21, 2020 3:41 PM", + "userId" : "178868", + "content" : "I'll assume this is resolved." + } ], + "tags" : [ "/support/power-management/f/196/tags/UCD3138" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895633.json b/data/json/DLP/895633.json new file mode 100644 index 0000000000000000000000000000000000000000..111917f4f669415afb4ed2912e33268ef4793ef2 --- /dev/null +++ b/data/json/DLP/895633.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "895633", + "reporterName" : "Tsvetan Ginin", + "rankPoints" : "100", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS40210: LM5022 PCB check", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 27", + "queryText" : "Part Number: TPS40210 Hi again Richard, I also decided to send you the finished circuit board to check for gross discrepancies. When you find the time, look at it.PowerBoard_V1.0_All.PDF", + "partNumber" : " TPS40210", + "allResponseList" : [ { + "contentId" : "3312107", + "userName" : "Richard Fu22", + "rankPoints" : "2925", + "rankName" : "Intellectual", + "date" : "Apr 9, 2020 11:57 PM", + "userId" : "5003147", + "content" : "Hi Tsvetan, Thanks for sending the files. I can get back to you by next week since tomorrow is US holiday. Thanks, Richard" + }, { + "contentId" : "3320112", + "userName" : "Richard Fu22", + "rankPoints" : "2925", + "rankName" : "Intellectual", + "date" : "Apr 18, 2020 12:18 AM", + "userId" : "5003147", + "content" : "Hi Tsvetan, Generally looks fine. I would add a placeholder capacitor in parallel to R20 and C24. Additionally, I would change R18 to 100 Ohm to minimize the time-constant so you don't delay the current sense signal. Thanks, Richard" + }, { + "contentId" : "3322474", + "userName" : "Tsvetan Ginin", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 7:47 AM", + "userId" : "6075347", + "content" : "Hi Richard, I made the changes for which you wrote. Soon I will let the board for production and then will hear again. Thanks for the helpful tips and suggestions. Regards, Tsvetan" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS40210", "/support/power-management/f/196/tags/LM5022" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895679.json b/data/json/DLP/895679.json new file mode 100644 index 0000000000000000000000000000000000000000..4772925f0eaeea02d6a4d0ac47c9b9e583a4e24f --- /dev/null +++ b/data/json/DLP/895679.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "895679", + "reporterName" : "Nick Hsu1", + "rankPoints" : "20", + "resolutionStatus" : "Resolved", + "ticketName" : "WEBENCH® Tools/LM5122ZA: LM5122ZA frequency setting", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 32", + "queryText" : "Part Number: LM5122ZA Tool/software: WEBENCH® Design Tools Hi, LM5122ZA Feature shows frequency up to 1 MHz, why I cant simulate over 352.94 1KHz? So I setting Rt as 18 KOhm, the frequency is 500 KHz, but it shows an alert M1 Tj:341.27 °C Specification: <150.00 °C M1 MOSFET junction temperature is too high Suggested:<150.00 °C This may lead to a device malfunction or breakdown. Some possible solutions are below: Decrease Switching Frequency to decrease MOSFET or Diode switching losses Decrease ambient temperature Decrease thermal resistance by adding a heat sink if feasible Increase the copper area and thickness of the board I'd change many MOSFET with low Ciss/Coss, low Qrr. It still shows this alert. I have size issue, can't design the frequency under 500 KHz. Here is my setting specification as below: Vin=19V, Vout=60V, Iout=1.6A (Pin = 100W) Frequency = 500 to 800 KHz One more question about current limit I want set Ipeak=7A, according to section 7.3.10, Rs=10 mOhm According to section 8.1.4, if I want to use Rdcr of inductor, how to calculating 7A limit?", + "partNumber" : " LM5122ZA", + "allResponseList" : [ { + "contentId" : "3312102", + "userName" : "Richard Fu22", + "rankPoints" : "2925", + "rankName" : "Intellectual", + "date" : "Apr 9, 2020 11:50 PM", + "userId" : "5003147", + "content" : "Hi Nick, Sorry to hear you are having troubles. I can get back to you by next week since Friday is US holiday. Thanks, Richard" + }, { + "contentId" : "3320094", + "userName" : "Richard Fu22", + "rankPoints" : "2925", + "rankName" : "Intellectual", + "date" : "Apr 17, 2020 11:32 PM", + "userId" : "5003147", + "content" : "Hi Nick, To answer each of your questions: 1) I'm able to build the circuit using the LM5122 model. What you should do is follow the attachment below: I believe there were some initial WeBench issues that may have prevented you from accessing this, but it seems to work for 500KHz. Additionally, if you are having more trouble getting WeBench to work, I would recommend using the LM5122 quick-start calculator here: /product/LM5122ZA/toolssoftware 2) If you want to implement DCR sensing, your peak current limit is ideally based on the inductor's dc resistance. The resistor and capacitor that you see in that scheme is to make sure that the time constants of the LR network and the RC network match. Thanks, Richard" + }, { + "contentId" : "3328349", + "userName" : "Nick Hsu1", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 6:21 AM", + "userId" : "6235485", + "content" : "Hi Richard, Thanks for reply ! For the (2) question, for example According to section 8.1.4 of datasheet, I can calculate a value for LR and RC matching. But how could I know about my current limiting value? If my Iin_max = 5A, I want to set the current limiting at 7A. The only is changing my inductor's DCR to 10 mOhm? If my inductor's DCR is 20 mOhm, is there anyway to set the current limiting to 7A without a external sense resistor ? Thank you." + }, { + "contentId" : "3329356", + "userName" : "Richard Fu22", + "rankPoints" : "2925", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 6:57 PM", + "userId" : "5003147", + "content" : "Hi Nick, The peak inductor current is determined as the sum of your average input current (worse-case) and half of your inductor peak-peak ripple. Your current limit value is determined by the DCR resistance, so if you wanted to set an exact current limit, you would need to change the inductor's resistance to match. In fact, a better solution is to select an inductor with a DCR such that your IL_pk*DCR does not trip current limit. Additionally, you could add a resistor in parallel to C_dcr to increase your current limit, but this may require more calculations and an extra component. This second method can only increase your current limit. Thanks, Richard" + } ], + "tags" : [ "/support/power-management/f/196/tags/WEBENCH_AE00_%2bDesign%2bTools", "/support/power-management/f/196/tags/LM5122ZA" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895692.json b/data/json/DLP/895692.json new file mode 100644 index 0000000000000000000000000000000000000000..a7eab04faca1aafebd9586201cff264f565b5d51 --- /dev/null +++ b/data/json/DLP/895692.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "895692", + "reporterName" : "user3502896", + "rankPoints" : "70", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "Lead Acid Battery Charger for 2 serial 12V Lead Acid Batterys", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 22", + "queryText" : "Hello at all I am locking für a lead Acid Batterie Charger for 2 serial 12V Lead Acid Batteries. My Charg Current must between 150 mA to 500mA. My Supply Voltage is from a step up and can change between 24V and 33V. Which is the right choice for my charging Point. Kind Regards Olli", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3311767", + "userName" : "Jeff F", + "rankPoints" : "88360", + "rankName" : "Guru", + "date" : "Apr 9, 2020 4:48 PM", + "userId" : "8433", + "content" : "Hi, UC2906 is linear charger controller of external pass FET that can operate up to 40V input. BQ24610 is switching charge controller of external switching FETs that can operate up to 28V input. It will need a few modifications for optimal lead acid charger as documented in the app not at . Regards, Jeff" + }, { + "contentId" : "3322636", + "userName" : "user3502896", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 10:43 AM", + "userId" : "3502896", + "content" : "Hello Jeff is it possible to use the BQ24450 for my problem. I will use a step up from 24 V to 32V, after that i like to use the BQ24450 for my Batteries. What do you think about that. Regards Oliver" + }, { + "contentId" : "3323064", + "userName" : "Jeff F", + "rankPoints" : "88360", + "rankName" : "Guru", + "date" : "Apr 21, 2020 3:31 PM", + "userId" : "8433", + "content" : "Oliver, Yes, you can boost the input and use the BQ24450. Please be aware of external pass element power dissipation. I recommend boosting only high enough to prevent the pass element from entering dropout, in order to minimize heating due to power dissipation. Regards, Jeff" + } ], + "tags" : [ "/support/power-management/f/196/tags/Lead%2bAcid%2bBatterie" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895721.json b/data/json/DLP/895721.json new file mode 100644 index 0000000000000000000000000000000000000000..e81c5f404c3af5e6cbc50146d6a39334c228e34e --- /dev/null +++ b/data/json/DLP/895721.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "895721", + "reporterName" : "Stefanie Schmidiger", + "rankPoints" : "40", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BOOSTXL-PGA460: Using two PGA460 EVMs for Indoor Positioning System", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 38", + "queryText" : "Part Number: BOOSTXL-PGA460 Hi I would like to evaluate the PGA460 for use in an ultrasonic indoor positioning system. In the end, there will be one mobile sender and multiple receivers, but for now evaluation of one sender and one receiver would be ok as well. Sender and receiver will be up to 5 meters apart, but never closer than about 0.5m. Is there any way I can set this up with one or more PGA460 EVM? The struggle will be to synchronize both evalkits to the same time source. Even if there are cables which will limit the distance two EVMs can be apart, but is there a way at all to test this with the kits?", + "partNumber" : " BOOSTXL-PGA460", + "allResponseList" : [ { + "contentId" : "3311839", + "userName" : "Akeem Whitehead", + "rankPoints" : "21215", + "rankName" : "Mastermind", + "date" : "Apr 9, 2020 5:41 PM", + "userId" : "3766999", + "content" : "Hi Stefanie, Yes, it is possible to configure one PGA460 as a transmitter, and the other as a receiver. Yes, you can use two BOOSTXL-PGA460 EVMs to synchronize the two PGA460s devices using the broadcast burst-and-listen command. Please refer to the PGA460 Array of Ultrasonic Transducers for Triangulation and Tracking ( /lit/an/slaa783/slaa783.pdf ) app report for a detailed explanation on synchronizing multiple PGA460 devices. You don't need to add the triangulation algorithm for your application, unless you need position tracking. In short, one of the EVMs will only be connected to the driver (OUTA and OUTB pins), while the other EVM is only connected to the receiver (INP and INN pins). This way, when you send a broadcast burst/listen command to all PGA460s on the same UART/SPI bus, all devices will be synchronized, but only the driver-EVM will burst, and only the receiver-EVM will listen due to the hardware configuration. You can then add up to a total of eight PGA460 devices (one transmitter, seven receivers) to expand the number of receivers using the same approach since the PGA460 uses a three-bit address (UART_ADDR = 0h to 7h)." + }, { + "contentId" : "3315347", + "userName" : "Stefanie Schmidiger", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 14, 2020 2:28 PM", + "userId" : "6299536", + "content" : "Hi Akeem Thank you for the answers and the link, the SLAA783 is what I was looking for. But it does not provide details about the hardware setup. Is the demo application GUI used as a platform and the commands are issued using the \"Interface Mode\" tab? Meaning that the GUI will broadcast by sending a message out to all serial connectors available at the same time? Is it possible to communicate to the PGA460 that is sitting on top of the MSP430 using the serial COM port on the computer? What are the prerequisites? Can I have the GUI running at the same time or would it block the COM port? I will try to use multiple PGA460 as I will use trilateration for this setup: one receiver (the moving robot in the field with only a small battery) and multiple transmitters at fixed locations." + }, { + "contentId" : "3315605", + "userName" : "Akeem Whitehead", + "rankPoints" : "21215", + "rankName" : "Mastermind", + "date" : "Apr 14, 2020 4:39 PM", + "userId" : "3766999", + "content" : "Hi Stefanie, Yes, you can use the GUI's Interface page to send broadcast commands to all PGA460 devices connected to the same UART bus of the MSP-EXP430F5229LP. Afterwards, you would then use the Interface page to send a single address command to read back the ultrasonic measurement result or echo data dump data of the receiving PGA460s. Remember, you will need to pre-program the UART_ADDR to different values on all the PGA460s individually (using the GUI) before you connect them all to the same UART bus. It is possible to program the MSP-EXP430F5229LP to work in a serial USB-CDC COM terminal mode, but you will not be able to use both the GUI and a COM terminal simultaneously. The GUI requires the MSP430 to programmed with proprietary USB2ANY firmware that runs in a USB-HID mode. For an example of using the same PGA460-Q1 EVM hardware (MSP-EXP430F5529LP and BOOSTXL-PGA460) in a serial COM port mode, please refer to the PGA460 Energia Library and Code Example (Version 1.0.9) (Rev. I). This download actually includes a triangulation example (Triangulation.ino), which you can repurpose for the already implemented broadcast burst/listen command and ultrasonic measurement result readback. You would just need to remove the post-processing triangulation function. This example uses UART_ADDR address '0' as the transmitter/transceiver module, and address '1' as the receive-only module. Do not connect the transducer to the driver pins (OUTA/OUTB) on the receive-only module." + }, { + "contentId" : "3328577", + "userName" : "Stefanie Schmidiger", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 10:12 AM", + "userId" : "6299536", + "content" : "Hi Akeem I have now worked with the Energia library extensively and am ready to connect multiple PGA460 daughterboards to the same MSP430 launch pad. Can I just stack the daughter cards on top of each other, meaning all IO Pins going from the MSP430 launchpad to the PGA460 will be in bus mode and be connected to all PGA460 in my setup? Or do I only connect certain pins of the launchpad in a bus topology to the PGA daughter cards?" + } ], + "tags" : [ "/support/sensors/f/1023/tags/PGA460", "/support/sensors/f/1023/tags/BOOSTXL_2D00_PGA460" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895771.json b/data/json/DLP/895771.json new file mode 100644 index 0000000000000000000000000000000000000000..292439aa901bc47c4ff1e4da28982ece05c4e8db --- /dev/null +++ b/data/json/DLP/895771.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "895771", + "reporterName" : "Anthony Schnelle", + "rankPoints" : "30", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LMR23610: Current Draw instability", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 28", + "queryText" : "Part Number: LMR23610 Hello, I have been investigating this issue more. By increasing the inductance from 15uH to 22uH the current draw is stabilized. Reading the datasheet it shows that 15uH is recommended for 3.3V outputs. Attached is a schematic of the circuit in question. buck page.pdf", + "partNumber" : " LMR23610", + "allResponseList" : [ { + "contentId" : "3311882", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 9, 2020 6:18 PM", + "userId" : "1881345", + "content" : "Hello If the 22uH works for you, then that value should be OK. Thanks" + }, { + "contentId" : "3312099", + "userName" : "Anthony Schnelle", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 9, 2020 11:42 PM", + "userId" : "4623045", + "content" : "Frank, Is there any reason that the 15uH would cause unstable current draw. If so why would it be suggested in the datasheet. It is only a very few LMR23610 chips that seem to have this behavior with the 15uH inductors. Does any one have any insight as to why there would be a difference between chips? Anthony" + }, { + "contentId" : "3313835", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 13, 2020 3:23 PM", + "userId" : "1881345", + "content" : "Hello There will always be difference between devices due to normal manufacturing tolerances. For this device the inductor value will have a small influence on the full load performance but more influence at light loads. If you can give us your schematic and your input, output, and load conditions, along with wave-forms of the input current for both \"bad\" and \"good\" conditions then we may be able to help explain further. Thanks" + }, { + "contentId" : "3329127", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 4:22 PM", + "userId" : "1881345", + "content" : "Hello I will close this post due to inactivity. Thanks" + } ], + "tags" : [ "/support/power-management/f/196/tags/LMR23610" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895784.json b/data/json/DLP/895784.json new file mode 100644 index 0000000000000000000000000000000000000000..edcd4131d0a23f575b483c5ccfb630711d5016a5 --- /dev/null +++ b/data/json/DLP/895784.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "895784", + "reporterName" : "Edward Lee", + "rankPoints" : "840", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ24070: BQ24070 STAT1 is blinking", + "rankName" : "Intellectual", + "replies" : " 5", + "views" : " 30", + "queryText" : "Part Number: BQ24070 Hi Sir, My customer encountered a problem with the behavior of pin STAT1. When the charger IC fully charged the battery and continued to operate overnight (maybe up to 8~10hours), they found the pin STAT1 will start to blink. This does not happen in all the cards with BQ24070, only a few of them. Once this phenomenon occurs, it can be solved by replacing with another BQ24070. Would you kindly advise how to solve the problem? Thanks Sincerely, Edward", + "partNumber" : " BQ24070", + "allResponseList" : [ { + "contentId" : "3311990", + "userName" : "Raheem", + "rankPoints" : "16655", + "rankName" : "Genius", + "date" : "Apr 9, 2020 8:33 PM", + "userId" : "4697250", + "content" : "Hello Edward, When this occurs, do you see a difference between the voltage on the BAT pin and the battery before termination occurs?" + }, { + "contentId" : "3313269", + "userName" : "Edward Lee", + "rankPoints" : "840", + "rankName" : "Intellectual", + "date" : "Apr 13, 2020 3:33 AM", + "userId" : "3463160", + "content" : "Hi Raheem, Just want to check again about the voltage difference. Did you mean the voltage difference between the good one and the blinking one? Since the pin BAT1/BAT2 are short to output of battery, there seems to be no voltage difference between them. Thanks Edward" + }, { + "contentId" : "3315623", + "userName" : "Raheem", + "rankPoints" : "16655", + "rankName" : "Genius", + "date" : "Apr 14, 2020 4:47 PM", + "userId" : "4697250", + "content" : "Hello, There's some trace impedance between the BAT pin and the battery which can cause the voltage on the BAT pin to be higher than the actual battery voltage." + }, { + "contentId" : "3321921", + "userName" : "Raheem", + "rankPoints" : "16655", + "rankName" : "Genius", + "date" : "Apr 20, 2020 8:19 PM", + "userId" : "4697250", + "content" : "Hello, Any updates here?" + }, { + "contentId" : "3323202", + "userName" : "Edward Lee", + "rankPoints" : "840", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 5:16 PM", + "userId" : "3463160", + "content" : "Hi Raheem, For now it's hard to reproduce the issue after replacing the charger IC with new one. May I close the thread first and open a new one once it happens again? Thanks Sincerely, Edward" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24070" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895821.json b/data/json/DLP/895821.json new file mode 100644 index 0000000000000000000000000000000000000000..1b293830ee535ba2492425aa54e293a165ff06e6 --- /dev/null +++ b/data/json/DLP/895821.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "895821", + "reporterName" : "Vernon Alt", + "rankPoints" : "150", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ24195: REGN and PMID definitions", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 31", + "queryText" : "Part Number: BQ24195 Q1. I've looked all over and can't find what REGN and PMID stand for. Q2. In section 5 of the datasheet (SLUSB97A) the last sentence of the 4th paragraph states\"When the full battery falls below the recharge threshold, the charger will automatically start another charging cycle.\" and in section 8.3.3.1 the last sentence of the paragraph under the bullets states \"When a full battery voltage is discharged below recharge threshold (REG04[0]), the bq24195L, bq24195 automatically starts another charging cycle.\" The Battery Recharge Threshold (VRECHG) can be set to 100 or 300 mV with the default being 100 mV. What is the 100 or 300 mV referenced to? It can't be referenced to ground or the recharge cycle wouldn't start until way below 3.0 V. I'm using a LiCoO2, 2000 mAh, 3.7 V battery. Thanks Much!", + "partNumber" : " BQ24195", + "allResponseList" : [ { + "contentId" : "3312249", + "userName" : "Ning T", + "rankPoints" : "15365", + "rankName" : "Genius", + "date" : "Apr 10, 2020 3:58 AM", + "userId" : "145100", + "content" : "Hi, 1. REGN is internal LDO regulator. PM100mV ID is the direct power input for the charger. 2. 100mV or 300mV is referenced to VREG (REG04[7:2]). Thanks, Ning." + }, { + "contentId" : "3314003", + "userName" : "Vernon Alt", + "rankPoints" : "150", + "rankName" : "Prodigy", + "date" : "Apr 13, 2020 4:45 PM", + "userId" : "3773164", + "content" : "Hi Ning, Thanks for responding! I should have asked differently and I apologize for any confusion. 1) What do the letters stand for? Example: POR stands for Power On Reset 2) I was really asking multiple questions here so please allow me to clarify: 2.1.a \"When the full battery falls below the recharge threshold, the charger will automatically start another charging cycle.\" 1 2.1.b \"When a full battery voltage is discharged below recharge threshold (REG04[0]), the bq24195L, bq24195 automatically starts another charging cycle.\" 2 The term “full battery” is what’s throwing me off and of the two statements here, the second statement, while self contradicting, makes more sense that the first sentence. My rationale for saying this is that, referring to 2.1.a, a \"full battery\" will have a voltage around 4.1 to 4.2 V and never fall below the VRECHG threshold, therefore it shouldn’t be referred to as a “full battery”. The statement in 2.1.b again uses the phrase “full battery”, but this time adds the fact that the battery has been “discharged”, however it says that when the battery voltage drops below the VRECHG threshold another charging cycle is initiated. You stated that VRECHG threshold (100 mV or 300 mV) is referenced to VREG (REG04[7:2]). This means if VREG is set to 4.208 V (default) and VRECHG is set to 100 mV (default) the recharge cycle will initiate when the battery voltage drops below 4.108. VREG (4.208 V) - VRECHG (100 mV) = 4.108 V therefore VRECHG can’t be referenced to VREG or to GND as I stated in my original query. 2.1) The PCM on my battery has an Overdischarge threshold of 2.50 V and I want my battery recharge cycle to initiate at 3.0 V so how do I achieve this? 2.2) Does or can the phrase “full battery” mean something other than a battery that is full? Please note this is just a confusing/irritating point for me considering my background in Metrology where accuracy and precision are the order of the day. References are within Datasheet SLUSB97A 1 section 5 the last sentence of the 4th 2 section 8.3.3.1 the last sentence of the paragraph under the bullets Thanks Much, Vernon" + }, { + "contentId" : "3321569", + "userName" : "Ning T", + "rankPoints" : "15365", + "rankName" : "Genius", + "date" : "Apr 20, 2020 4:14 PM", + "userId" : "145100", + "content" : "Veron, 1) The pin names are inherited from earlier products. 2.1) The host may disable charge when needed, but separate battery monitoring circuitry is needed. You may consider BQ25895 which has integrated battery monitoring function. 2.2) Full battery means the battery voltage has reached VREG (e.g. 4.208V), i.e. the battery is charged to full. Thanks, Ning." + }, { + "contentId" : "3325666", + "userName" : "Vernon Alt", + "rankPoints" : "150", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 1:50 PM", + "userId" : "3773164", + "content" : "Hi Ning, I've been working with the bq27441 Fuel Gage, however a cursory look at the bq25895 looks very promising. Thank you so much for the help! Stay Safe! Vernon" + } ], + "tags" : [ "/support/power-management/f/196/tags/REGN", "/support/power-management/f/196/tags/BQ24195L", "/support/power-management/f/196/tags/PMID", "/support/power-management/f/196/tags/VRECHG", "/support/power-management/f/196/tags/bq24195" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895920.json b/data/json/DLP/895920.json new file mode 100644 index 0000000000000000000000000000000000000000..b30195a59c60509f4a197859d97e1afa8e2344c5 --- /dev/null +++ b/data/json/DLP/895920.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "895920", + "reporterName" : "2018", + "rankPoints" : "2330", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ21040: When the charging current of 0.8a is output by BQ21040 and the ambient temperature is 25 degrees, what degree will the IC reach?", + "rankName" : "Expert", + "replies" : " 2", + "views" : " 42", + "queryText" : "Part Number: BQ21040 When the charging current of 0.8a is output by BQ21040 and the ambient temperature is 25 degrees, what degree will the IC reach? How to calculate the NTC of BQ21040?Do you have a spreadsheet? Does BQ21040 support 100K NTC?", + "partNumber" : " BQ21040", + "allResponseList" : [ { + "contentId" : "3314487", + "userName" : "Nick Brylski", + "rankPoints" : "340", + "rankName" : "Prodigy", + "date" : "Apr 14, 2020 12:05 AM", + "userId" : "5338371", + "content" : "With 5V input, an estimate of junction temperature would be (max dropout voltage) * 0.8 A * RθJB + 25C = (5-2.5V) * .8A * 45.5 C/W + 25 C = 116 C. This also depends on board layout. The IC temperature is not recommended to be measured with the TS pin, the device has internal thermal regulation when it approaches 125C. The TS pin is intended to measure the temperature of the battery pack. We do not recommend you use a 100k NTC as this would put the temperature range of the device outside normal range. We suggest a 10K NTC such as SEMITEC 103AT-2. This gives the normal operation of 0 - 45C. What temperature range are you trying to achieve here? Best," + }, { + "contentId" : "3321935", + "userName" : "Nick Brylski", + "rankPoints" : "340", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 8:34 PM", + "userId" : "5338371", + "content" : "Hi there, I haven’t heard back from you, I’m assuming you were able to resolve your issue. If not, just post a reply below or create a new thread if the thread has locked due to time-out. Regards," + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ21040" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895945.json b/data/json/DLP/895945.json new file mode 100644 index 0000000000000000000000000000000000000000..af98c397d2b48b2e6089c10fdce3492173c12310 --- /dev/null +++ b/data/json/DLP/895945.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "895945", + "reporterName" : "Shinji Tsuji", + "rankPoints" : "4640", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS3850-Q1: /RESER and /WD tie together", + "rankName" : "Expert", + "replies" : " 5", + "views" : " 33", + "queryText" : "Part Number: TPS3850-Q1 Hi team, I would like to tie /RESET and /WD together to make MCU in reset state when either OV/UV or Watchdog time out error occurs. Is there any concern using these functions tie together? If this is possible, pull up resister values should be same as I use these pins separately, since /WD is in high impedance while /RESET is low, correct? regards,", + "partNumber" : " TPS3850-Q1", + "allResponseList" : [ { + "contentId" : "3313426", + "userName" : "Abhinav.Sharma", + "rankPoints" : "6855", + "rankName" : "Expert", + "date" : "Apr 13, 2020 8:22 AM", + "userId" : "4691355", + "content" : "Hi Shinji, Have you looked at a device such as the TPS3813-Q1 that combines these functions into a single RESET output? Thanks, Abhinav." + }, { + "contentId" : "3313436", + "userName" : "Shinji Tsuji", + "rankPoints" : "4640", + "rankName" : "Expert", + "date" : "Apr 13, 2020 8:49 AM", + "userId" : "1880790", + "content" : "Hi Abhinav, Thank you. I will look into this. But what about the operation of the TPS3850-Q1? Is it possible to use TPS3850-Q1 in this use case? regards," + }, { + "contentId" : "3315930", + "userName" : "Abhinav.Sharma", + "rankPoints" : "6855", + "rankName" : "Expert", + "date" : "Apr 14, 2020 9:59 PM", + "userId" : "4691355", + "content" : "Hi Shinji, I believe by tying two equivalent pullup resistors here, it should still operate as intended. This use case, however, is not guaranteed in the datasheet. It must be tested. Thanks, Abhinav." + }, { + "contentId" : "3316075", + "userName" : "Shinji Tsuji", + "rankPoints" : "4640", + "rankName" : "Expert", + "date" : "Apr 15, 2020 1:45 AM", + "userId" : "1880790", + "content" : "Hi Abhinav, Since /WD is in high impedance when /RESET is pulled Low, I think pull up resistor only requires 1, correct? regards," + }, { + "contentId" : "3323846", + "userName" : "Abhinav.Sharma", + "rankPoints" : "6855", + "rankName" : "Expert", + "date" : "Apr 22, 2020 6:21 AM", + "userId" : "4691355", + "content" : "Shinji, Yes, sorry, I meant two rails to one pullup resistor. Thanks, Abhinav." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS3850_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/895959.json b/data/json/DLP/895959.json new file mode 100644 index 0000000000000000000000000000000000000000..dbe742a136cffd8c10b4320e243a6ce33e497bcb --- /dev/null +++ b/data/json/DLP/895959.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "895959", + "reporterName" : "Dan1", + "rankPoints" : "520", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "High Side Switch with Ultra Low Power", + "rankName" : "Intellectual", + "replies" : " 11", + "views" : " 156", + "queryText" : "Hi, Is there a high side switch that can run off a 9-14V battery pack with a 3.3V enable? It will essentially be used as a gate driver for an N-channel FET that is switching high current loads. We are specifically looking for something with the lowest possible quiescent and shutdown currents; preferably in the nanoamps. I haven't found any in thecompany parametric search since I can't search by Iq. Kind regards,", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3313001", + "userName" : "Priya Thanigai", + "rankPoints" : "26330", + "rankName" : "Mastermind", + "date" : "Apr 11, 2020 7:08 PM", + "userId" : "779557", + "content" : "Hello Dan, We do have a pretty sizable portfolio of High Side Switches depending on what the application needs. You mentioned 'high current' any chance you can share with us what type of load you are driving, peak/ nominal current profile? Before I can answer the question on Iq, I'd like to double check and make sure we are looking at the right portfolio: Do you need: 1. A solution with an integrated FET that provides on/off control for off-board load driving, <<70-90A -> If yes, this is the high side switch Specific product: TPS1HB08-Q1 2. Do you plan to use an external FET and you only need a gate drive to turn on/off FET -> If yes, then you may need to look into the Ideal Diode Controller family. Our lowest Iq device in this family is the LM74700 Both families listed above are AECQ100 qualified and work across the car battery voltage range. On Iq, are you referring to the quiescent current when the device is enabled (operating quiescent current when enable=high) ; or in shutdown mode? Thanks for providing clarity, so we can get you to the right products. -Priya" + }, { + "contentId" : "3318951", + "userName" : "Dan1", + "rankPoints" : "520", + "rankName" : "Intellectual", + "date" : "Apr 17, 2020 5:10 AM", + "userId" : "6255688", + "content" : "Thanks Priya, Sorry about the delayed reply. I had some time off work. I don’t think I’m reading the TPS1HB08-Q1 datasheet correctly. Why is the output leakage in standby (0.5µA @ 25°C) greater than the total output current in standby (0.1µA @ 25°C) ? I took the total output current in standby to mean leakage also because there shouldn't be any output in standby mode. Peak would be around 50A, and the normal would be < 32A. We’re still working on the first prototype so it would be better to overestimate. The purpose of this FET is to disable most of the board to allow the product to hibernate We are looking for a solution with an external FET. We are open to integrated FETs but didn’t think this would be viable. We already include STL180N6F7 in our BOM so we would prefer to use that in order to reduce the number of unique components. On Iq, We would like shutdown mode to be in the nanoamps to extend battery life. The lower the better. The shutdown current of LM74700-Q1 (0.9-1.5µA) is better than most but we would still like something lower. The operating quiescent is less important but we would prefer something less than a few µA. The operating quiescent current of TPS1HB08-Q1 (6mA) may be too high. Kind regards," + }, { + "contentId" : "3320098", + "userName" : "Timothy Logan", + "rankPoints" : "5600", + "rankName" : "Expert", + "date" : "Apr 17, 2020 11:41 PM", + "userId" : "1849899", + "content" : "Dan, The LM74700-Q1 will likely be your best bet here as an ideal diode controller. It will be limited on the sort of diodnostics it can provide, however will offer the least quiescent current. I will loop in someone from the team who will be able to provide more intimate technical details about the part." + }, { + "contentId" : "3320429", + "userName" : "Karikalan Selvaraj", + "rankPoints" : "13870", + "rankName" : "Genius", + "date" : "Apr 19, 2020 9:22 AM", + "userId" : "1601212", + "content" : "Hi Dan, If you are looking for low Iq Ideal diode controller, then LM74700-Q1 is the best fit. But however you are looking for high-side switch which you would like to turn on the loads when disabled. LM74700-Q1 can not be used in these applications, because even if it turned off body diode of external MOSFET is going to conduct. LM5060-Q1 is another device which controls the MOSFET in a high-side switch type of functionality. This is more suitable than LM74700-Q1. Regards, Kari." + }, { + "contentId" : "3322433", + "userName" : "Dan1", + "rankPoints" : "520", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 7:15 AM", + "userId" : "6255688", + "content" : "Thanks Timothy and Kari, We are looking for a high side switch. I suspect that what I'm looking for may not exist. We have relaxed the spec but we still need to preserve battery life while the FET is disabled. This product will sleep for months between short bursts of high power consumption. Unfortunately, LM5060 still doesn't meet our requirements because of it's 15µA max shutdown current. Do you have anything that matches the following relaxed requirements? Total shutdown current is by far the most important parameter. Total ISHUTDOWN Prefer ≤ 1µA Accept ≤ 10µA (only if we really have no choice) Total IOPERATING Prefer ≤ 1mA (the lower the better) Accept ≤ 10mA (only if we really have no choice) VLOGIC Must be compatible with 3.3V micro VSUPPLY Must run on 9-14V supply The unlikely exception is if it can run on a 3.3V supply and drive an N channel FET from 9-14V without compromising shutdown current by adding the additional supply. FET configuration Must be high side Prefer external but will accept internal FET of ≥ 80A. Prefer N channel. P channel alternatives would need to beat the N channel drivers by enough to justify the additional reel. Kind regards," + }, { + "contentId" : "3324010", + "userName" : "Karikalan Selvaraj", + "rankPoints" : "13870", + "rankName" : "Genius", + "date" : "Apr 22, 2020 9:06 AM", + "userId" : "1601212", + "content" : "Hi Iq reduction is possible with LM5060 by adding a MOSFET between IC GND and external GND. This GND side MOSFET can be disabled during shutdown mode. Rakesh will share more in this solution. Regards, Kari." + }, { + "contentId" : "3324118", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 11:14 AM", + "userId" : "4743883", + "content" : "Hi Dan, A signal FET between device ground and the system ground like below can help to meet the target shutdown current spec. Let me know if you have any followup questions. Best Regards, Rakesh" + }, { + "contentId" : "3324537", + "userName" : "Dan1", + "rankPoints" : "520", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 3:36 PM", + "userId" : "6255688", + "content" : "Thanks Rakesh and Kari, Using that solution, how low will the shutdown current be? Will it just be the sum of the IDS leakage from the low side small signal FET and high side power FET? Can the overcurrent detection be disabled so that we can use it at 80A through the power FET? We already have overcurrent protection closer to the supply anyway. Kind regards," + }, { + "contentId" : "3325216", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 4:48 AM", + "userId" : "4743883", + "content" : "Hi Dan, We have not characterized the leakage current but it should just be the leakage through the external FET (Drain-to-Source leakage). As you see, the ground disconnect FET leaves all the external biasing components around LM5060-Q1 OPEN and hence no shunt leakage at the input. The overcurrent function can be disabled by connecting the TIMER pin directly to the device GND. Best Regards, Rakesh" + }, { + "contentId" : "3325452", + "userName" : "Dan1", + "rankPoints" : "520", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 9:42 AM", + "userId" : "6255688", + "content" : "Thanks Rakesh, I am very excited about this solution. When I took it to the rest of the team for review, a few questions came back. When LM5060 is disabled through the enable pin, and through the shutdown pin, what is to stop the enable pin from floating higher than 3.3V and frying the microcontroller on the other side? From the block diagram in the datasheet, it looks like the enable pin may actually end up being pulled to the now floating GND which could potentially be at the same level as the 9V-14V input. Is there anything else on the PG pin that we would need to worry about in the same way as the enable pin? It looks like it would be safe, assuming that the block diagram is complete. The signal FET that I intend to use for disconnecting the device ground has a VDS leakage of 100nA. It could be replaced with something that has better leakage, but what will this leakage do to the LM5060? e.g. if GND floats around 5V or 16V when the supply is 9V-14V, will it cause the LM5060 to do unpredictable things with the power FET? Kind regards," + } ], + "tags" : [ "/support/power-management/f/196/tags/power%2bmanagement", "/support/power-management/f/196/tags/Gate%2bDriver", "/support/power-management/f/196/tags/quiescent", "/support/power-management/f/196/tags/ultra%2blow%2bpower", "/support/power-management/f/196/tags/high%2bside%2bswitch", "/support/power-management/f/196/tags/enable", "/support/power-management/f/196/tags/load%2bswitch", "/support/power-management/f/196/tags/Shutdown", "/support/power-management/f/196/tags/FET%2bDriver" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/896070.json b/data/json/DLP/896070.json new file mode 100644 index 0000000000000000000000000000000000000000..aec531e2d2d7004347be9ea7259ca3291f31d290 --- /dev/null +++ b/data/json/DLP/896070.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "896070", + "reporterName" : "Nicholas Ipri1", + "rankPoints" : "120", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ24650: BQ24650RVAT: Maximum Charge Current", + "rankName" : "Prodigy", + "replies" : " 10", + "views" : " 53", + "queryText" : "Part Number: BQ24650 Am thinking about using this part to charge lead acid batteries with a maximum charge current of 10A. Usingcompany CSD18502Q5B MOSFETS and Coilcraft SER2915 series inductor. Will this work? Thanks!", + "partNumber" : " BQ24650", + "allResponseList" : [ { + "contentId" : "3312767", + "userName" : "Jeff F", + "rankPoints" : "88360", + "rankName" : "Guru", + "date" : "Apr 10, 2020 5:23 PM", + "userId" : "8433", + "content" : "Nicholas, The BQ24650 HI and LO gate drivers should be able to drive the FETs hard enough to get 10A. With the correctly sized inductor for the VBUS to VBAT delta and desired current, and related, voltage ripple, that inductor should work. I recommend reading the two appnotes below if the application is for solar charging: Regards, Jeff" + }, { + "contentId" : "3312789", + "userName" : "Nicholas Ipri1", + "rankPoints" : "120", + "rankName" : "Prodigy", + "date" : "Apr 10, 2020 6:01 PM", + "userId" : "6226448", + "content" : "Thanks!" + }, { + "contentId" : "3315390", + "userName" : "Nicholas Ipri1", + "rankPoints" : "120", + "rankName" : "Prodigy", + "date" : "Apr 14, 2020 2:55 PM", + "userId" : "6226448", + "content" : "Asking a related question: I want to implement the charging circuit in figure 2 of appnote SLVA437SA \"Using the bq24650 to Charge a Sealed, Lead-Acid Battery\" 1) If I were to power my system load directly from the battery pack e.g. the node of D3, R6, R23, etc, would this confuse the charging process by drawing too much load current through R6 (Rsr)? 2) If I power my system load from the recommended node, it looks as though the load powers from Vin when Vin > Vbattery pack and from Vbatterypack otherwise. How can I assure that the load power is uninterrupted when near the transition?" + }, { + "contentId" : "3315414", + "userName" : "Jeff F", + "rankPoints" : "88360", + "rankName" : "Guru", + "date" : "Apr 14, 2020 3:08 PM", + "userId" : "8433", + "content" : "Hi Nicolas. Regarding 1, the charger limits the output current to the programmed value per RSR. If your load load connected in parallel with the battery draws all of that current, then the battery will not charge. Also, with an almost charged battery, the charger will not be able to distinguish between load and termination current so the charger will likely never report charger termination correctly. Regarding 2, if the VIN and battery nodes are properly diode ORd, the transition is seamless. Regards, Jeff" + }, { + "contentId" : "3315721", + "userName" : "Nicholas Ipri1", + "rankPoints" : "120", + "rankName" : "Prodigy", + "date" : "Apr 14, 2020 6:09 PM", + "userId" : "6226448", + "content" : "Got it, thanks!" + }, { + "contentId" : "3318376", + "userName" : "Nicholas Ipri1", + "rankPoints" : "120", + "rankName" : "Prodigy", + "date" : "Apr 16, 2020 5:52 PM", + "userId" : "6226448", + "content" : "Another related question! If I were to use my host processor to monitor battery voltage and charge current while controlling the MPPSET pin. I could implement the pulse charging algorithm as described in the appnote for charging lead acid batteries without the added components. My ideal goal is to power my load directly from the battery while charging while eliminating the ORing diodes in the process.is this feasible?" + }, { + "contentId" : "3318383", + "userName" : "Jeff F", + "rankPoints" : "88360", + "rankName" : "Guru", + "date" : "Apr 16, 2020 6:02 PM", + "userId" : "8433", + "content" : "Nicolas, Yes! Regards, Jeff" + }, { + "contentId" : "3318414", + "userName" : "Nicholas Ipri1", + "rankPoints" : "120", + "rankName" : "Prodigy", + "date" : "Apr 16, 2020 6:29 PM", + "userId" : "6226448", + "content" : "Thanks again, that's a huge plus that will help this part fit perfectly in my design" + }, { + "contentId" : "3323274", + "userName" : "Nicholas Ipri1", + "rankPoints" : "120", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 6:20 PM", + "userId" : "6226448", + "content" : "One more... The example ckt on p23 has D2 as a BAT54C which is a dual diode. Am assuming that the 2nd diode is unused and just want to confirm." + }, { + "contentId" : "3323300", + "userName" : "Jeff F", + "rankPoints" : "88360", + "rankName" : "Guru", + "date" : "Apr 21, 2020 6:41 PM", + "userId" : "8433", + "content" : "Hi Nicholas, I think the part number is a typo. It should be the single diode version of the BAT54. Regards, Jeff" + } ], + "tags" : [ "/support/power-management/f/196/tags/CSD18502Q5B", "/support/power-management/f/196/tags/bq24650" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/896133.json b/data/json/DLP/896133.json new file mode 100644 index 0000000000000000000000000000000000000000..72e2bb397373b11b185f5ea6b1d2a72840664119 --- /dev/null +++ b/data/json/DLP/896133.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "896133", + "reporterName" : "Jack Tan80", + "rankPoints" : "5635", + "resolutionStatus" : "", + "ticketName" : "UCD3138: Memory debugger in GUI", + "rankName" : "Genius", + "replies" : " 2", + "views" : " 23", + "queryText" : "Part Number: UCD3138 Hi Amiel, I got a save error while exporting the watchlist in memory debugger. Please see below error. And I found that there is no such error if using the \"show register only - auto map select\", but this issue can be inserted while selecting \"Select Folder Containing Map/PP files\", can you please help to look into this? Here are the files that can be used to reproduce this error. And in order to reproduce this issue, you may have to select AdcRegs, DPWM0Regs, and DPWM1Regs into watchlists, click 'Refresh watch lists', and 'Export watchlist', this issue can be occurs.UCD3138_lab2.zip", + "partNumber" : " UCD3138", + "allResponseList" : [ { + "contentId" : "3314372", + "userName" : "Amiel Hussain", + "rankPoints" : "3210", + "rankName" : "Expert", + "date" : "Apr 13, 2020 9:07 PM", + "userId" : "674455", + "content" : "Hey Jack, I will take a look and get back to you." + }, { + "contentId" : "3328132", + "userName" : "Amiel Hussain", + "rankPoints" : "3210", + "rankName" : "Expert", + "date" : "Apr 26, 2020 6:24 PM", + "userId" : "674455", + "content" : "Hello Jack, I was unable to reproduce the issue. Here are the steps I took: I downloaded the .x0 from the zip file. I then manually selected the map folder I added to the watchlist AdcRegs, DPWM0Regs, and DPWM1Regs I clicked refresh watchlist then I clicked export watchlist and did not have an issue. See below image and I have also attached the exported content. I tried export with each type (csv, XML, txt) and no issue. Did I miss something?DC-DC HSFB Firmware v0.0.11.105 @ Address 88d Watchlist Memory.xml Can you tell me what the translation of the error is? Do you think maybe you" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCD3138" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/896167.json b/data/json/DLP/896167.json new file mode 100644 index 0000000000000000000000000000000000000000..b1515043352fd8eec9529fcd4880dc5291ce2a20 --- /dev/null +++ b/data/json/DLP/896167.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "896167", + "reporterName" : "user6322596", + "rankPoints" : "30", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ4050: A giant skip of a smart battery using bq4050 gague in low temperature(-20℃)", + "rankName" : "Prodigy", + "replies" : " 5", + "views" : " 51", + "queryText" : "Part Number: BQ4050 Hello,experts of TI, There is a urgent issue need to solve. Battery using a bq4050 gague . During the test in normal temperature(25℃),there is a 5% skip of the battery capacity; During the test in low temperature(-20℃),there is a 85 % skip of the battery capacity; During the test in high temperature(55℃),there is a 7% skip of the battery capacity; So,I wanna know that how to fix the battery discharge curve so that battery capacity has a acceptable performance among normal/low/high temperature. THANKS.", + "partNumber" : " BQ4050", + "allResponseList" : [ { + "contentId" : "3314485", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 14, 2020 12:02 AM", + "userId" : "1864278", + "content" : "My colleague will take a look and get back to you. Andy" + }, { + "contentId" : "3315920", + "userName" : "Dominik Hartl11", + "rankPoints" : "35875", + "rankName" : "Mastermind", + "date" : "Apr 14, 2020 9:42 PM", + "userId" : "9849", + "content" : "Please clarify, is this the bq4050 or the bq40z50?" + }, { + "contentId" : "3316118", + "userName" : "user6322596", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 15, 2020 2:49 AM", + "userId" : "6322596", + "content" : "Thanks for your reply. And as my title said, the gauge IC is bq4050. Thanks." + }, { + "contentId" : "3321837", + "userName" : "Dominik Hartl11", + "rankPoints" : "35875", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 7:06 PM", + "userId" : "9849", + "content" : "The bq4050 uses CEDV, which relies on accurate learned FCC with qualified discharges. See 6.3 in the TRM for details. A qualified discharge to update FCC has, among other rules, a limit on temperature, which is 11.9C by default. A battery will have vastly reduced capacity at -20C and depending on the load, FCC can be significantly less than FCC that was learned above 11.9C. Therefore it is possible that the gauge will calculate incorrect SOC at -20C because it will use FCC that is too high for this temperature. There is a limitation of the CEDV algorithm. The bq40z50 does not have this restriction. If you observe a jump in SOC at room temperature then the previously learned FCC is not indicative of the conditions that were present. For example, the load may have increased. That's why it is important for the gauge to learn FCC through regular discharges with a typical load at temperatures above 11.9C. The CEDV algorithm has the ability to adjust EDV2/1 voltages based on load and temperature (but not down to -20C) to mitigate SOC jumps. This requires that you program the gauge CEDV parameters based on: /tool/GPCCEDV" + }, { + "contentId" : "3327845", + "userName" : "user6322596", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 25, 2020 12:10 PM", + "userId" : "6322596", + "content" : "Thanks. And I'll have a try as you told." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ4050", "/support/power-management/f/196/tags/bq4050%2bskip%2blow%2btemperature" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/896197.json b/data/json/DLP/896197.json new file mode 100644 index 0000000000000000000000000000000000000000..e8ef21081c09dd149834b77b9883b18ae9cbf59d --- /dev/null +++ b/data/json/DLP/896197.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "896197", + "reporterName" : "Zhehui Guo", + "rankPoints" : "60", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC21710-Q1: time delay before OC pin is activated", + "rankName" : "Prodigy", + "replies" : " 6", + "views" : " 42", + "queryText" : "Part Number: UCC21710-Q1 Hicompany engineers, I have a question about time delay of OC-pin. According to the datasheet, \"The OC pin is in high-impedance state when the output is in high state, which means the overcurrent and short circuit protection feature only works when the power semiconductor is in on state.\" I am wondering whether \"OC pin becomes Hi-Z\" and \"output becomes high state\" occur simultaneous or not? If \"OC pin becomes Hi-Z\" occurs after \"output becomes high state\" with some time delay, and then how much the time delay is? Appreciate any information you can provide. Many thanks. Zack", + "partNumber" : " UCC21710-Q1", + "allResponseList" : [ { + "contentId" : "3313095", + "userName" : "Don Dapkus", + "rankPoints" : "174575", + "rankName" : "Guru", + "date" : "Apr 12, 2020 1:09 PM", + "userId" : "1027", + "content" : "Hi, Zach, Welcome to e2e, and thanks for your interest in our products. Check out Figure 36, this shows how the over-current protection works. Figures 24 and 26 include timing information as well. Let us know if you have further questions." + }, { + "contentId" : "3327512", + "userName" : "Zhehui Guo", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 8:07 PM", + "userId" : "6000162", + "content" : "Hi Don Dapkus, Many thanks for your reply. In fact, I was confused by the difference of datasheet figure and the simulation results. According to the datasheet, it seems that there is a tiny time delay to release oc pin after gate increases. In fact, I am not very clear about the meaning of \"Gate\" here. Is it the gate voltage across the gate-source terminals of the mosfets, or the voltage of OUTH/OUTL pins of this IC. Or maybe there is no big difference for them. However, according to the simulation results. there is a more than 250ns time delay, which is too large for my application. Please see the following picture. I used the UCC21710 Unencrypted PSPICE Transient Model provided bycompany and then converted it into LTspice simulation to get the below results. Is this 270ns time delay true for ucc21710? or is it possible for ucc21732 since there is 2L soft turn-off in the vgs waveforms, which is consistent with the characteristics of ucc21732. And another question about UCC21710 Unencrypted PSPICE Transient Model, why dose this model have the 2L soft turn-off characteristics of ucc21732? Is that right? Appreciate any help you can give. Many thanks. Bests, Zack" + }, { + "contentId" : "3327548", + "userName" : "Audrey Dearien7", + "rankPoints" : "4345", + "rankName" : "Expert", + "date" : "Apr 24, 2020 9:07 PM", + "userId" : "5003116", + "content" : "Hello Zack, There is no internal delay for the OC pin to begin rising. It is able to track the voltage applied to the pin within a few tens of nanoseconds of the OUTH pin going high. The Gate signal is denoting the actual voltage of the IGBT or SiC MOSFET. This is different than OUTH/OUTL when there is a gate resistor present. The reason the figure shows a small delay between Gate going high and OC going high is representing the time before the Gate reaches the threshold voltage of the IGBT or SiC MOSFET. The current through the device will not begin to rise until this threshold is met. Thus, the OC voltage does not sense the current until the Gate voltage is high enough to allow current to flow (through the sense resistor or other means of connecting the OC pin). Whatever is causing the delay in your simulation should not be due to the IC. Can you share a snapshot of the circuit? I do not see the 2LTO behavior in my simulation model. It is the STO behavior. It is hard to see from the waveform you share whether the turn-off exhibits STO or 2LTO behavior. Additionally, if you are simulating with a power device model, you may see a plateau voltage due to the power switch characteristics itself during STO, rather than a plateau voltage induced by the gate driver. Regards, Audrey" + }, { + "contentId" : "3327637", + "userName" : "Zhehui Guo", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 10:28 PM", + "userId" : "6000162", + "content" : "Hi Audrey， Many thanks for your quick reply. Now I am clear about timing question. Then let's focus on the simulation issues. First, here gives the circuit and simulation results of ucc21710 with VDD=15V. This is a single switch hard-switching short-circuit fault testing. The model of mosfet tested is from Wolfspeed. For the waveforms, the sequence follows: vds: drain-source voltage of mosfet; iL1 is the short circuit current. voc: the voltage on oc pin. vgs: gate-source voltage mosfet, vpwm_in: pwm signal input. Overall, the simulation results are strange, I think. When the fault is detected, vgs is still at high output for long time, which is even longer than the pwm signal. It is amazing. In order to illustrate the possible 2LTO, I increased the value of VDD, then you can notice the change of vgs during fault condition. It looks like the 2LTO. I also find another interesting thing about ucc21732. I just replace above ucc21710 LTpsice model with ucc21732 LTspice model and add the external mosfet for clamping function. The left circuits remains the same with the above ones (VDD=15V). From ucc21732's results, vgs can be shut down normally, but there is no any 2LTO waveforms as datasheet mentions. It looks like that these two models swap their fault turn-off characteristics. For ucc21710 and ucc21732, I just used online unencrypted models, and converted them into LTspice to get simulations. Many thanks for your time and hep. Bests, Zack." + }, { + "contentId" : "3327749", + "userName" : "Zhehui Guo", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 25, 2020 3:35 AM", + "userId" : "6000162", + "content" : "Hi Audrey， I just modified my simulation setup and then find something to clear some of my questions. I put the rest signals to clear fault signals and thus I can obtain the multiple and continuous short-circuit behaviors. I found that after the first two abnormal events, the vgs looks normal at the third pulse. You can see the following the pictures. The first picture is about ucc21710 and the second one is about ucc21732. For ucc21710, the vgs will be shunt down at the third fault pulse, which is different from the first two pulses. And there is no 2LTO for the normal waveforms. For ucc21732. the vgs will reobtain the 2LTO function at the third fault pulse, which is different from the first two pulses. So I guess the previous simulation may be related to the start-up process? Since it is just my guessing, I still want to get your comments and suggestions. Many thanks. Appreciate the discussion with you. Bests, Zack" + }, { + "contentId" : "3328197", + "userName" : "Audrey Dearien7", + "rankPoints" : "4345", + "rankName" : "Expert", + "date" : "Apr 27, 2020 1:33 AM", + "userId" : "5003116", + "content" : "Hello Zack, The VDD UVLO delay to Output High is 5us and the VCC UVLO delay to Output High is 37.8us. It does not look like UVLO startup delay since the output follows the input from the first pulse. This is unusual behavior and I will need some time to check the model and your circuit more closely. If you delay the start of the simulation (after 10us) does the behavior persists? Additionally, what is your command statement \"ic. v(C1)=0\"? Regards, Audrey" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC21710_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/896239.json b/data/json/DLP/896239.json new file mode 100644 index 0000000000000000000000000000000000000000..05935aba1e8078edc8e6d781e0bd750d1d15fa94 --- /dev/null +++ b/data/json/DLP/896239.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "896239", + "reporterName" : "Shenhua Zhang", + "rankPoints" : "520", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS53355: What is the voltage of 'PGOOD' pin?", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 24", + "queryText" : "Part Number: TPS53355 Customer connects TPS53355 'PGOOD' to 'MODE', by a 100kohm resistor to select FCC mode. So based on this kind of connection below, how to calculate 'PGOOD' signal voltage? is it 4.5V?", + "partNumber" : " TPS53355", + "allResponseList" : [ { + "contentId" : "3313695", + "userName" : "Gerold Dhanabalan - Online Design Tools", + "rankPoints" : "8770", + "rankName" : "Expert", + "date" : "Apr 13, 2020 2:16 PM", + "userId" : "1132529", + "content" : "Hi Shenhua, The VREG voltage range is from 4.77 to 5.36V with a nominal voltage of 5V. Using that, when PGOOD is high, the 10K and 100K will form a potential divider and will give you an approximate voltage of 4.5V (for a nominal 5V of VREG) on PGOOD pin. When PGOOD is pulled low, it would be having an on resistance between 15 ohm to 55 ohm. So would give a logic low voltage of 27mV for 55 ohm forming the resistor divider with 10k for a 5V Vreg. Please refer to the electrical characteristics table for ranges of VREG and PGOOD on-resistance. Regards, Gerold" + }, { + "contentId" : "3315712", + "userName" : "Shenhua Zhang", + "rankPoints" : "520", + "rankName" : "Prodigy", + "date" : "Apr 14, 2020 6:00 PM", + "userId" : "5617559", + "content" : "Hi Gerold, When PGOOD is high, there is a 10k&100K divider from VREG; When PGOOD is low, there is a 10K&55ohm divider from VREG; Is it correct? If yes, when PGOOD is high, Mode pin should be 0v, right? Then PGOOD forms by 10k and 100K divider from VREG." + }, { + "contentId" : "3326356", + "userName" : "Gerold Dhanabalan - Online Design Tools", + "rankPoints" : "8770", + "rankName" : "Expert", + "date" : "Apr 23, 2020 10:46 PM", + "userId" : "1132529", + "content" : "Hi Shenhua, When PGOOD is high, there is a 10k&100K divider from VREG; Answer is Yes When PGOOD is low, there is a 10K&55ohm divider from VREG; Answer is Yes MODE pin senses 2 things: The first is the resistor connected to the pin during start-up to determin soft start time. The second is the voltage on the pin to determin Auto skip or FCCM. Before startup, it senses the resistor and for a 100k resistor it startup with a 1.4ms soft start time. The PGOOD voltage remains low during start up. So the MODE will be low. So, the part will be auto-skip mode during start-up. After the start-up completes, PGOOD will go high and the MODE pin will also go high. So the part will toggle from auto-skip mode to FCCM mode. Please refer to this section in the datasheet /lit/ds/symlink/tps53355.pdf#page=20 Regards, Gerold" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS53355" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/896245.json b/data/json/DLP/896245.json new file mode 100644 index 0000000000000000000000000000000000000000..5b662df1c5621e33d32572c3311651eba33822c9 --- /dev/null +++ b/data/json/DLP/896245.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "896245", + "reporterName" : "Michael Su", + "rankPoints" : "360", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "AWR2243: MINO Antenna layout pattern in the reference document: Design Guide TIDEP-01012", + "rankName" : "Intellectual", + "replies" : " 12", + "views" : " 97", + "queryText" : "Part Number: AWR2243 Hi, About the question for the antenna configuration at the page 9 of the document, Design Guide TIDEP-01012, Why the distance between the RX Array- B and RX Array-C is 4 lamdas, and the distance between RX Array-C and RX Array-A is 16 lamdas ? Thanks Michael Su", + "partNumber" : " AWR2243", + "allResponseList" : [ { + "contentId" : "3313387", + "userName" : "Vivek Dham", + "rankPoints" : "30420", + "rankName" : "Mastermind", + "date" : "Apr 13, 2020 7:15 AM", + "userId" : "333578", + "content" : "Hello Michael, The antenna array spacing is set to get the virtual receiver antenna array as shown in page 10. If the spacing is reduced this azimuth array spacing, which is presently 86 lamda/2 , will reduce, reducing the azimuth angular resolution. Regards, Vivek" + }, { + "contentId" : "3313409", + "userName" : "Michael Su", + "rankPoints" : "360", + "rankName" : "Intellectual", + "date" : "Apr 13, 2020 7:39 AM", + "userId" : "5817834", + "content" : "Hi Vivek, For application of cascade two AWr2243 chips, no elevation angle is considered that means the 6 TXs are positioned at the same level, in order to get the maximum virtual RX antenna, what the distance between the RX Array- B and RX Array-C should be spaced ? ( the space bewteen RX in the same group is 0.5 lamda, the space between TX antenna is 2 lamdas) Another question, For same application, how to calculate the angular resolution in the TX beamforming mode ? Why it said the angular resolution in these two operation mode ( TX beamforming mode and MIMO mode) are equivalent in the document: Design Guide: TIDEP-01012 Thanks Michael Su" + }, { + "contentId" : "3314977", + "userName" : "Michael Su", + "rankPoints" : "360", + "rankName" : "Intellectual", + "date" : "Apr 14, 2020 8:43 AM", + "userId" : "5817834", + "content" : "Hi Vivek, Any updaate ? Thanks Michael Su" + }, { + "contentId" : "3315085", + "userName" : "Vivek Dham", + "rankPoints" : "30420", + "rankName" : "Mastermind", + "date" : "Apr 14, 2020 10:32 AM", + "userId" : "333578", + "content" : "Hello Michael, If you want to use uniform antenna spacing and get good angular resolution in the azimuth angle, without any overlap antennas, then you can have a 48 element virtual Rx array (6 Tx and 8Rx) , with all virtual Rx spaced by Lamda/2 spacing. The angular resolution depends on the virtual receive antenna array , you can refer to some of the training material we have online for more details: /sites/default/files/docs/mmwaveSensing-FMCW-offlineviewing_4.pdf Regards, Vivek" + }, { + "contentId" : "3316105", + "userName" : "Michael Su", + "rankPoints" : "360", + "rankName" : "Intellectual", + "date" : "Apr 15, 2020 2:29 AM", + "userId" : "5817834", + "content" : "Hi Vivek, I know the angular resolution is prportional to RX antenna number, The total RX antenna number of the TX beamforming mode should be smaller than the MIMO mode, but why it said the the receiver angle resolution in these two operation modes (TX beamforming mode and MIMO mode) are equivalent in the paragraph 3.4.2 of the document, TIDUEN5A ? Thanks Michael Su" + }, { + "contentId" : "3317419", + "userName" : "Michael Su", + "rankPoints" : "360", + "rankName" : "Intellectual", + "date" : "Apr 16, 2020 1:19 AM", + "userId" : "5817834", + "content" : "Hi Vivek, Any update ? Thanks Michael Su" + }, { + "contentId" : "3317849", + "userName" : "Vivek Dham", + "rankPoints" : "30420", + "rankName" : "Mastermind", + "date" : "Apr 16, 2020 10:03 AM", + "userId" : "333578", + "content" : "Hello Michael, The results in section 3.4.2 of the user guide are with stitched TX beam forming, that is multiple readings taken with beam steered at different angles. That is how the aperture is the same as MIMO and hence the angular resolution in this case is similar. If you have only one measurement with beam steered at one angle only then the angular resolution would be poorer. Regards, vivek" + }, { + "contentId" : "3318840", + "userName" : "Michael Su", + "rankPoints" : "360", + "rankName" : "Intellectual", + "date" : "Apr 17, 2020 2:33 AM", + "userId" : "5817834", + "content" : "Hi Vivek, 1. For application, the two AWR2243 chips are cascaded, in order to get the more azimuth virtual antenna ( remove the overlapped antenna), the distance between RX array-B and RX array-C will be increased in the documen, TIDUEN5A, will it get any sid effect ? will the overlapped antenna be necessary ? what is your recommendation ? 2. In the document, TIDUEN5A, why the virtual RX antenna is 7 for elevation plane? how to calculate them? 3. For LRR application, if the azimuth FOV is +- 9 degree, the antenna configuration is 6TX + 8RX, what the azimuth angular resolution should be in the TX beamforming mode ? Thanks Michael Su" + }, { + "contentId" : "3320726", + "userName" : "Michael Su", + "rankPoints" : "360", + "rankName" : "Intellectual", + "date" : "Apr 20, 2020 5:07 AM", + "userId" : "5817834", + "content" : "Hi Vivek, Any update ? Thanks Michael Su" + }, { + "contentId" : "3323615", + "userName" : "Michael Su", + "rankPoints" : "360", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 1:13 AM", + "userId" : "5817834", + "content" : "Hi Vivek, Any comment or any update ? Thanks Michael Su" + } ], + "tags" : [ "/support/sensors/f/1023/tags/AWR2243", "/support/sensors/f/1023/tags/TIDEP_2D00_01012", "/support/sensors/f/1023/tags/AWR20_5F00_p2_5F00_hw20_5F00_boost" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/896249.json b/data/json/DLP/896249.json new file mode 100644 index 0000000000000000000000000000000000000000..5fcef46e03d39c3a1a95b8252deeb350a7b18901 --- /dev/null +++ b/data/json/DLP/896249.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "896249", + "reporterName" : "Henry Lau", + "rankPoints" : "370", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "IWR1443BOOST: IWR1443BOOST Heatmap", + "rankName" : "Intellectual", + "replies" : " 14", + "views" : " 94", + "queryText" : "Part Number: IWR1443BOOST trying to get the heatmap data from the IWR1443Boost demo board. Is the FFT bin number by default 256? Any way to change it to 512 or 1024? Henry", + "partNumber" : " IWR1443BOOST", + "allResponseList" : [ { + "contentId" : "3313684", + "userName" : "Akash Gondalia", + "rankPoints" : "39385", + "rankName" : "Mastermind", + "date" : "Apr 13, 2020 2:11 PM", + "userId" : "4768107", + "content" : "Hi Henry, Are you working with the standard Out of Box Demo or a different software set? We'll need a few days to respond to the rest of your question. Regards, AG" + }, { + "contentId" : "3313980", + "userName" : "Henry Lau", + "rankPoints" : "370", + "rankName" : "Intellectual", + "date" : "Apr 13, 2020 4:37 PM", + "userId" : "3305808", + "content" : "Hi AG, I am using the default, preloaded software of the demo board and I am using Python to get data from the comm port using the CLI commands. Thanks a lot, Henry" + }, { + "contentId" : "3314191", + "userName" : "zigang Yang", + "rankPoints" : "7975", + "rankName" : "Expert", + "date" : "Apr 13, 2020 6:48 PM", + "userId" : "44611", + "content" : "Hi, Henry: Which SDK version you are using? And are you talking about range-Doppler heatmap? If so, the range-Doppler heatmap size is determined by the number of ADC samples (range FFT size) per chirp and the number of chirps (Doppler FFT size) in one frame. You can search for profileCfg and frameCfg inside the SDK users guide to understand how to change them in CLI control interface. The SDK users guide is located at: C:\\ti\\mmwave_sdk_xx_xx_xx_xx\\docs\\mmwave_sdk_user_guide.pdf. The range of ADC samples is below 1024, which can be found below: file:///C:/ti/mmwave_sdk_03_03_00_03/packages/ti/control/mmwavelink/docs/doxygen/html/structrl_profile_cfg__t.html#a9448ecc83ce18857f1f1efba82af3d72 The range of number of loops is below 255 , which can be found below: file:///C:/ti/mmwave_sdk_03_03_00_03/packages/ti/control/mmwavelink/docs/doxygen/html/structrl_frame_cfg__t.html#a6f3cf525d5792d9f906c72cd7e76f66d In addition there is limitation of the max value of (range FFT size * Doppler FFT size * number of antenna pair), which is below 96K complex samples per frame for IWR1443. In addition, you may limited by UART speed, so please adjust the frame periodicity accordingly. Best, Zigang" + }, { + "contentId" : "3314726", + "userName" : "Henry Lau", + "rankPoints" : "370", + "rankName" : "Intellectual", + "date" : "Apr 14, 2020 4:49 AM", + "userId" : "3305808", + "content" : "Hi Zigang, It is MMWAVE SDK 2.1.0.4 and I am doing the Azimuth heatmap. Thanks a lot, Henry" + }, { + "contentId" : "3315418", + "userName" : "zigang Yang", + "rankPoints" : "7975", + "rankName" : "Expert", + "date" : "Apr 14, 2020 3:10 PM", + "userId" : "44611", + "content" : "Hi, Henry: The Range-Azimuth heatmap is generated from the zero Doppler bins. The zero Doppler bins is calculated inside radar sensor and with size (number of range FFT * number of visual antenna), then the actual heatmap is calculated inside the visualizer instead of the radar sensor. I will reach out to find out the size of this heatmap in angle domian and get back to you. Best, Zigang" + }, { + "contentId" : "3315478", + "userName" : "Henry Lau", + "rankPoints" : "370", + "rankName" : "Intellectual", + "date" : "Apr 14, 2020 3:39 PM", + "userId" : "3305808", + "content" : "Hi Zigang, What is the number of range FFT? Thanks a lot, Henry" + }, { + "contentId" : "3315558", + "userName" : "zigang Yang", + "rankPoints" : "7975", + "rankName" : "Expert", + "date" : "Apr 14, 2020 4:15 PM", + "userId" : "44611", + "content" : "HI, Henry: Range FFT information can be configured through profileCfg as number of ADC samples. You can search for profileCfg inside the SDK users guide to understand how to change them in CLI control interface. The SDK users guide is located at this relative directory: C:\\ti\\mmwave_sdk_xx_xx_xx_xx\\docs\\mmwave_sdk_user_guide.pdf. The maximum number of ADC samples is below 1024. In addition there is limitation of the max value of (range FFT size * Doppler FFT size * number of antenna pair), which is below 96K complex samples per frame for IWR1443. Best, Zigang" + }, { + "contentId" : "3316956", + "userName" : "Henry Lau", + "rankPoints" : "370", + "rankName" : "Intellectual", + "date" : "Apr 15, 2020 4:21 PM", + "userId" : "3305808", + "content" : "Hi Zigang, Fully understood now. Really appreciate for the help. Henry" + }, { + "contentId" : "3323931", + "userName" : "Henry Lau", + "rankPoints" : "370", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 7:50 AM", + "userId" : "3305808", + "content" : "Hi Zigang, Actually, I have two more questions: 1. I am trying to do the calculation on the angle of arrival based on the heatmap data. What is the FFT bin to do the AOA? I am using 8 which is the number of virtual antenna. But I looked at the code of mmWave Demo Visualizer, it seems using a bin of 64. 2.I am using 2 TX and 4 RX antennas for MiMo, would the virtual antenna sequence be in the heatmap data as: virtual antenna 1, virtual antenna 2 .... virtual antenna 8. If we do FFT on that and find the the first peak at sequence number 5, is the object at the azimuth angle of 90 degrees? Thanks a lot, Henry" + }, { + "contentId" : "3324750", + "userName" : "zigang Yang", + "rankPoints" : "7975", + "rankName" : "Expert", + "date" : "Apr 22, 2020 5:56 PM", + "userId" : "44611", + "content" : "Hi, Henry: 1) The FFT bin used for angle estimation can be decided by users depends on available MIPS and memory. A size of 32 or more will be suggested. After FFT operation, the peak will be detected. If the FFT size is small, then the peak location will not be very accurate. 2) If you apply fftshift to your FFT output, then the index w = (-NFFT/2:NFFT/2-1)*2*pi/NFFT; So in your example, let us assume the peak of FFT output (before fftshift) is index 5, and the FFT size is 8 as you suggested in your question, then your w_peak is actually -pi; then the peak angle is actually: theta = asin (w_peak/pi) = -90 degree. You can find some basic angle estimation training at: /sites/default/files/docs/mmwaveSensing-FMCW-offlineviewing_4.pdf Best, Zigang" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR1443BOOST" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/896252.json b/data/json/DLP/896252.json new file mode 100644 index 0000000000000000000000000000000000000000..4ff6a534f2a3e4559ae6735396acc04e63436dc7 --- /dev/null +++ b/data/json/DLP/896252.json @@ -0,0 +1,79 @@ +{ + "ticketNumber" : "896252", + "reporterName" : "Manimaran Kanesan", + "rankPoints" : "340", + "resolutionStatus" : "Resolved", + "ticketName" : "LP38502-ADJ: Can this part support 4.85V/600mA output from 5V/900mA input?", + "rankName" : "Intellectual", + "replies" : " 8", + "views" : " 51", + "queryText" : "Part Number: LP38502-ADJ TI, I am looking at this part LP38502-ADJ, Linear Voltage Regulator IC 1 Output 1.5A 8-WSON. This part is recommended be WEBench and other TPS parts. Can this part support 600mA and 4.85V output current and voltage from an input of 5V and 900mA?From the datasheet it seems able to support this spec but like to confirm this viable. Or do you recommend any other part? no switcher pls. What is the voltage dropout at this output? And what is the different between TPS and LP parts? BRgds", + "partNumber" : " LP38502-ADJ", + "allResponseList" : [ { + "contentId" : "3313736", + "userName" : "JCHK", + "rankPoints" : "27915", + "rankName" : "Mastermind", + "date" : "Apr 13, 2020 2:37 PM", + "userId" : "1108707", + "content" : "HI Manimaran, Looking at the datasheet, this 5 to 4.85V at 600mA, would be marginal, and the device would be in Drop-out which means it would not have any effective PSRR. Our new TPS7A52 has a much lower drop-out and might be a better choice for this application. Under your load conditions, the drop-out would be ~67mV with the TPS7A52 (it is 150mV with the LP38502). The LP parts are a series of parts we inherited after acquiring National Instruments. The TPS parts are all designed and developed by TI. I hope this helps." + }, { + "contentId" : "3315543", + "userName" : "Manimaran Kanesan", + "rankPoints" : "340", + "rankName" : "Intellectual", + "date" : "Apr 14, 2020 4:04 PM", + "userId" : "4602090", + "content" : "Hi John, Thanks for the reply and the suggested part. TPS7A52 seems suite the design. There is charge pump in the LDO and this is the need for large cap (47uF). The LDO for WiFi an BT application, the concern is, is there any charge discharge time for the cap that can effect the supply to the RF Front end transmission. (Is this part suitable to power RF Front End?) The part is not available in Mouser or Digikey, am I correct on this? there is direct but from TI. BRgds" + }, { + "contentId" : "3315560", + "userName" : "JCHK", + "rankPoints" : "27915", + "rankName" : "Mastermind", + "date" : "Apr 14, 2020 4:15 PM", + "userId" : "1108707", + "content" : "Hi Manimaran, We designed this low noise part for RF power. So yes it is suitable. As for charging up the output capacitor, We have the following equation to estimate the startup time: We do have a PG pin that can be used to enable the RF circuit once the voltage is in regulation. As for discharge, It really depends on your circuit and load. I hope this helps." + }, { + "contentId" : "3317714", + "userName" : "Manimaran Kanesan", + "rankPoints" : "340", + "rankName" : "Intellectual", + "date" : "Apr 16, 2020 7:39 AM", + "userId" : "4602090", + "content" : "Hi John, All good, just on the Digikey and Mouser availability, do yo know when it will be available? BRgds" + }, { + "contentId" : "3318135", + "userName" : "JCHK", + "rankPoints" : "27915", + "rankName" : "Mastermind", + "date" : "Apr 16, 2020 2:45 PM", + "userId" : "1108707", + "content" : "Hi Manimaran, The RSP package just released a few weeks ago and currently only available on . The good news is thecompany now offers direct pricing so the pricing you see on should be cheaper than any of our distribution partners. Regards," + }, { + "contentId" : "3320713", + "userName" : "Manimaran Kanesan", + "rankPoints" : "340", + "rankName" : "Intellectual", + "date" : "Apr 20, 2020 4:26 AM", + "userId" : "4602090", + "content" : "Thanks John for the good info. I will close this discussion." + }, { + "contentId" : "3324649", + "userName" : "Manimaran Kanesan", + "rankPoints" : "340", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 4:45 PM", + "userId" : "4602090", + "content" : "Hi John, Sorry I thought I can close this, do you have Altium footprint and schematic symbol for this part, TPS7A52 . BRgds Manimaran" + }, { + "contentId" : "3324777", + "userName" : "JCHK", + "rankPoints" : "27915", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 6:19 PM", + "userId" : "1108707", + "content" : "HI Manimran, Here is what I could find. You may need to modify it. TPS7A52_RPS_package.intlib.zip I hope this helps." + } ], + "tags" : [ "/support/power-management/f/196/tags/LP38502_2D00_ADJ", "/support/power-management/f/196/tags/LP38502A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/896276.json b/data/json/DLP/896276.json new file mode 100644 index 0000000000000000000000000000000000000000..9951d6f1c65f08faa00eec0aefc95accd30543c7 --- /dev/null +++ b/data/json/DLP/896276.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "896276", + "reporterName" : "bing lu", + "rankPoints" : "30", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ28Z610: BQstudio shows not compatible", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 37", + "queryText" : "Part Number: BQ28Z610 Dears, I use BQ Studio(1.3.86) and EV2300 to connect BQ28Z610. 2S battery, 8.4V DC source. Auto Detected Device shows NONE. If select target manually, it tell me: The detected device is not compatible with this application! Some actions could cause the device to lose communication permanently and enter an unrecoverable state. If I click OK and keep proceeding, my battery voltage can be read back, but when I try to change register value, shows target no ACK. I try bothcompany EVK and my own board, same issue. Did I miss any thing? Thank you.", + "partNumber" : " BQ28Z610", + "allResponseList" : [ { + "contentId" : "3314039", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 13, 2020 5:02 PM", + "userId" : "1864278", + "content" : "You would need to wake up the BQ28z610 device on the EVM. Press the button on the EVM before you launch the bqStudio. Andy" + }, { + "contentId" : "3316038", + "userName" : "bing lu", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 15, 2020 12:59 AM", + "userId" : "1837821", + "content" : "Thanks Andy, I will try it." + }, { + "contentId" : "3323808", + "userName" : "bing lu", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 5:48 AM", + "userId" : "1837821", + "content" : "Hi Andy, I use another version of BQ28Z610 and problem solved, thanks." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ28Z610", "/support/power-management/f/196/tags/ev2300", "/support/power-management/f/196/tags/bqStudio" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/896284.json b/data/json/DLP/896284.json new file mode 100644 index 0000000000000000000000000000000000000000..c1fe8e5db5c5e755186d5cb0bd68aab11936549f --- /dev/null +++ b/data/json/DLP/896284.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "896284", + "reporterName" : "user5377993", + "rankPoints" : "40", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ40Z50-R1: The actual discharge overcurrent delay time is inconsistent with the set value, what is the problem?", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 41", + "queryText" : "Part Number: BQ40Z50-R1 Hello: The actual discharge overcurrent delay time is inconsistent with the set value, what is the problem?", + "partNumber" : " BQ40Z50-R1", + "allResponseList" : [ { + "contentId" : "3313427", + "userName" : "Steven Yao", + "rankPoints" : "5545", + "rankName" : "Expert", + "date" : "Apr 13, 2020 8:22 AM", + "userId" : "413009", + "content" : "Hi Can you help to check what is the discrepancy? it is possible for software overcurrent delay has 1 or 2 s discrepancy with the set value." + }, { + "contentId" : "3315171", + "userName" : "user5377993", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 14, 2020 12:05 PM", + "userId" : "5377993", + "content" : "The difference between the set value and the actual value is 1 second. Can the discharge overcurrent automatically recover the threshold through time?" + }, { + "contentId" : "3326214", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 23, 2020 8:23 PM", + "userId" : "3528441", + "content" : "Hello User, I believe it can, can you refer to the TRM on the OCD protection recovery section?" + } ], + "tags" : [ "/support/power-management/f/196/tags/bq40z50_2D00_r1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/896335.json b/data/json/DLP/896335.json new file mode 100644 index 0000000000000000000000000000000000000000..052e3e1185ae94ba5361d092eaab34b8a6192e72 --- /dev/null +++ b/data/json/DLP/896335.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "896335", + "reporterName" : "Kami Huang60", + "rankPoints" : "2370", + "resolutionStatus" : "", + "ticketName" : "BQ25606: JETIA Function test", + "rankName" : "Expert", + "replies" : " 2", + "views" : " 25", + "queryText" : "Part Number: BQ25606 Dear Sir/Ms. My customer tested the function of Charger JEITA. The ambient temperature is set at 48C. According to SPEC, the charging voltage will drop to 4.1V. The actual voltage measured by the customer (as shown in the graph below) is about 4.05V, is this reasonable? Does 4.1V have an error value? What is the error? The customer put three BQ25606 circuit boards in the same temperature control furnace. So there will be three curves. JEITA Charge measured battery voltage: Best Regards, Kami Huang", + "partNumber" : " BQ25606", + "allResponseList" : [ { + "contentId" : "3314493", + "userName" : "Ning T", + "rankPoints" : "15365", + "rankName" : "Genius", + "date" : "Apr 14, 2020 12:20 AM", + "userId" : "145100", + "content" : "Kami, Where did your customer measure the battery voltage? Thanks, Ning." + }, { + "contentId" : "3326788", + "userName" : "andy lin", + "rankPoints" : "10", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 8:06 AM", + "userId" : "5317921", + "content" : "Ning : Direct measurement of battery voltage (Vbat + & Vbat-)" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25606" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/896391.json b/data/json/DLP/896391.json new file mode 100644 index 0000000000000000000000000000000000000000..a00abce271b518b8195e4896d084252f7dcd5f3b --- /dev/null +++ b/data/json/DLP/896391.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "896391", + "reporterName" : "user6004348", + "rankPoints" : "80", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC28070: How to test loop current gain and phase", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 37", + "queryText" : "Part Number: UCC28070 HI sir If I want to test Figure 6. Current Loop Gain (TdB (f)) and Figure 7. Current Loop Phase (qc (f)) in SLUA479A The Schematic(page 2) in SLUA479A ,How to point cconnection TKS UCC28070 Design Review 300W Interleaved PFC- slua479.pdf", + "partNumber" : " UCC28070", + "allResponseList" : [ { + "contentId" : "3315026", + "userName" : "David Huang33", + "rankPoints" : "2120", + "rankName" : "Intellectual", + "date" : "Apr 14, 2020 9:39 AM", + "userId" : "5196361", + "content" : "hi you can insert the signal in the attached." + }, { + "contentId" : "3317426", + "userName" : "user6004348", + "rankPoints" : "80", + "rankName" : "Prodigy", + "date" : "Apr 16, 2020 1:25 AM", + "userId" : "6004348", + "content" : "HI David Follow your suggestions，I actually tested it, please refer to the attachment for the results TKSUCC28070EVM current loop gain and phase measurement.docx" + }, { + "contentId" : "3326493", + "userName" : "user6004348", + "rankPoints" : "80", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 1:43 AM", + "userId" : "6004348", + "content" : "HI Davin reminder" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC28070" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/896397.json b/data/json/DLP/896397.json new file mode 100644 index 0000000000000000000000000000000000000000..cbffd648e92f29d429a2491242b532a77fea2f4a --- /dev/null +++ b/data/json/DLP/896397.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "896397", + "reporterName" : "Muta", + "rankPoints" : "400", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS22912C: Land pattern", + "rankName" : "Intellectual", + "replies" : " 4", + "views" : " 50", + "queryText" : "Part Number: TPS22912C Hi, Would you tell me the information of land pattern and solder mask for TPS22912CYZVR ? There are no information on the datasheet. Datasheet: TPS22912C Regards,", + "partNumber" : " TPS22912C", + "allResponseList" : [ { + "contentId" : "3314425", + "userName" : "Andy Robles", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 13, 2020 10:16 PM", + "userId" : "6043129", + "content" : "Hi, Welcome to E2E! I am currently looking for a land pattern example that can be used for the TPS22912C. I will post the information as soon as I receive it. Best regards, Andy Robles" + }, { + "contentId" : "3317128", + "userName" : "Andy Robles", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 15, 2020 6:38 PM", + "userId" : "6043129", + "content" : "Hi, I was able to find a similar package, but in order to confirm if we can use the same land pattern I had to request some information that will take 2-3 days to get the data. I will get back to you as soon as I get the information. In the mean time I would like to promote on of our newer devices, the TPS22916C, which is very similar to the TPS22912C. The TPS22916C has a lower current consumption than the TPS22912C and offers an internal smart-on pin pull down resistor feature making an external pull down resistor necessary on the on-pin, which will reduce the BOM of the switching solution. In addition the TPS22916C has a similar RON values and similar rise time to support high capacitive loads. Let me know what you think. Best regards, Andy Robles" + }, { + "contentId" : "3326222", + "userName" : "Andy Robles", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 8:36 PM", + "userId" : "6043129", + "content" : "Hi, For the TPS22912C you may use the landing pattern found on the datasheet of the TPS22908. Let me know if you have any questions! Best regards, Andy Robles" + }, { + "contentId" : "3326418", + "userName" : "Muta", + "rankPoints" : "400", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 12:29 AM", + "userId" : "4083074", + "content" : "Andy-san, Thank you for your information. I use the landing pattern on TPS22908 dataheet. Regards, Takashi Murakami" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS22912C" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/896417.json b/data/json/DLP/896417.json new file mode 100644 index 0000000000000000000000000000000000000000..6e08072262c78ec507b40fbbffd229530d20d85c --- /dev/null +++ b/data/json/DLP/896417.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "896417", + "reporterName" : "Penn Zhang", + "rankPoints" : "850", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ21061: Safety timer function", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 21", + "queryText" : "Part Number: BQ21061 Hello Team, I set Charger safety timer is 3H for a test after 3H charger stopped, but SAFETY_TMR_FAULT_FLAG is not set to 1. As figure below. If we want to get the sign when safety timer expires, how to deal with this register? Also I have some guessing and questions below, Please help comments. 1. From the figure above, Mask3 register is 0xde as the figure, it is 1101 1110, SAFETY_TMR_FAULT_M ASK is 0, so it means the interrupt is Masked, so the interrupt will never send. How about the register, will the register also mask and will never change? 2.Interrupt trigger based on status bit change is rising edge, does this mean the interrupt will send during this bit rising edge? 3. I guess the Safety tmr fault flag is be cleared, but I'm not sure when it be cleared, could you give your suggestions. Thank you very much.", + "partNumber" : " BQ21061", + "allResponseList" : [ { + "contentId" : "3313791", + "userName" : "Raheem", + "rankPoints" : "16655", + "rankName" : "Genius", + "date" : "Apr 13, 2020 3:01 PM", + "userId" : "4697250", + "content" : "Hello Penn, The SAFETY_TMR_FAULT_FLAG is cleared after read. Are you sure the register was not read before the register dump? Mask3 being 0xDE means the safety timer Interrupt is NOT masked so the interrupt should be sent. The interrupt will be triggered when the flag is set." + }, { + "contentId" : "3322221", + "userName" : "Penn Zhang", + "rankPoints" : "850", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 2:47 AM", + "userId" : "5617536", + "content" : "Hi Raheem Thanks a lot." + } ], + "tags" : [ "/support/power-management/f/196/tags/bq21061" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/896492.json b/data/json/DLP/896492.json new file mode 100644 index 0000000000000000000000000000000000000000..42a8dc771fd955e059a4493ffe6e6f1a9cb400ef --- /dev/null +++ b/data/json/DLP/896492.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "896492", + "reporterName" : "Motoyasu Hattori", + "rankPoints" : "2515", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS62060: Any concern on Low value of feedback resistors", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 32", + "queryText" : "Part Number: TPS62060 Hi, According to TPS62060 datasheet P. 11, \"To minimize the current through the feedback divider network, R2 should be within the range of 120 kΩ to 360 kΩ. The sum of R1 and R2 should not exceed ~1 MΩ, to keep the network robust against noise.\" If R2 is less than 120kohm, Please let us know what is concern. Thanks and best regards, M.HATTORI.", + "partNumber" : " TPS62060", + "allResponseList" : [ { + "contentId" : "3315088", + "userName" : "Febin", + "rankPoints" : "1450", + "rankName" : "Intellectual", + "date" : "Apr 14, 2020 10:34 AM", + "userId" : "5781698", + "content" : "Hi Hattori, When R2 is lower obviously there's an increase in current in the feedback loop and it is not desirable. Is there a specific reason to choose a lower value? May be if you could share more details on the application, it would be easier to understand. In any case, I would strongly recommend to follow datasheet specifications. Regards, Febin" + }, { + "contentId" : "3319249", + "userName" : "Febin", + "rankPoints" : "1450", + "rankName" : "Intellectual", + "date" : "Apr 17, 2020 10:10 AM", + "userId" : "5781698", + "content" : "Hi Hattori, I hope I could answer your question. Please let me know if you need any further support. Regards, Febin" + }, { + "contentId" : "3325967", + "userName" : "Febin", + "rankPoints" : "1450", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 4:28 PM", + "userId" : "5781698", + "content" : "Hi Hattori, I hope you could solve the issue. I will close this post due to inactivity. Please feel free to contact us for any technical support. Regards, Febin" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS62060" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/896560.json b/data/json/DLP/896560.json new file mode 100644 index 0000000000000000000000000000000000000000..6c1b35ec9bb2439dc50702ebf9e18ee16b48f472 --- /dev/null +++ b/data/json/DLP/896560.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "896560", + "reporterName" : "Slava Prokopii", + "rankPoints" : "505", + "resolutionStatus" : "Resolved", + "ticketName" : "LM5032: space EP or alternative", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 21", + "queryText" : "Part Number: LM5032 Hello. Could you please advice, if there is a variant of LM5032 for using in space? Or could you please recommend any similar product, which has a space grade? Thank you.", + "partNumber" : " LM5032", + "allResponseList" : [ { + "contentId" : "3314828", + "userName" : "Teng Feng", + "rankPoints" : "9390", + "rankName" : "Genius", + "date" : "Apr 14, 2020 6:28 AM", + "userId" : "5617595", + "content" : "Hi Slava, I don't find the dual interleaved PWM controller with space grade standard. May I know what's converter specs, would you like to use other topology? Regards, Teng" + }, { + "contentId" : "3322530", + "userName" : "Teng Feng", + "rankPoints" : "9390", + "rankName" : "Genius", + "date" : "Apr 21, 2020 9:01 AM", + "userId" : "5617595", + "content" : "Hi Slave, I haven’t heard back from you for quite sometime, I’m assuming you were able to resolve your issue. If not, just post a reply below (or create a new thread if the thread has locked due to time-out) – thanks, Teng" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM5032", "/support/power-management/f/196/tags/Radiation%2bhardness", "/support/power-management/f/196/tags/space" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/896622.json b/data/json/DLP/896622.json new file mode 100644 index 0000000000000000000000000000000000000000..bb3b6567a3ec648ce6fca9e2687df6249431593b --- /dev/null +++ b/data/json/DLP/896622.json @@ -0,0 +1,79 @@ +{ + "ticketNumber" : "896622", + "reporterName" : "Amir Levine", + "rankPoints" : "50", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "DCA1000EVM: Difficulty connecting to device in mmWaveStudio GUI with AWR1642BOOST board", + "rankName" : "Prodigy", + "replies" : " 8", + "views" : " 72", + "queryText" : "Part Number: DCA1000EVM Hello, I am having a little difficulty with the DCA1000EVM. I am using it alongside the AWR1642BOOST EVM with the ultimate goal of vital detection. I would like to access the ADC data stream in MATLAB, however am having difficulty properly setting up the ADC1000 in the provided GUI first. I tried to follow the instructions outlined in the training video (/dca1000-training-video) but am having trouble with the Set Up DCA1000 feature on the left-hand side of the GUI (describe at 12:00). When I try to press ‘Connect, Reset and Configure’ I get the following error message in the output: This occurs when I press 'connect, reset and configure' in the following (note the lack of FPGA Version #): Additional information on my current configuration: The device also gets extremely warm very quickly . Does the board have any heatsinks? If not, should I be running it with a fan? I am concerned that this is related to the issues I am seeing above. Any insight you can provide into these issues will be much appreciated! Hope you are doing well during these crazy times. Warm Regards, -Amir Levine", + "partNumber" : " DCA1000EVM", + "allResponseList" : [ { + "contentId" : "3317077", + "userName" : "Kyle Cousino", + "rankPoints" : "19220", + "rankName" : "Mastermind", + "date" : "Apr 15, 2020 5:53 PM", + "userId" : "4381542", + "content" : "Amir, Did you make sure to set the IP address in the Network Connections part of the Control Panel in Windows? Can you also check all of your cable connections. You should have two power cables, two USB cables, and one Ethernet cable. You can refer to the DCA1000EVM Quick Start Guide: /lit/ml/spruik7/spruik7.pdf Ensure that your physical setup matches the one in the quick start guide. If you are using a laptop with a docking station, you will need to plug the Ethernet cable into the docking station. The preference would be to use the laptop disconnected from the docking station as it makes it easier to determine the correct Ethernet connection to changes in the Control Panel. Regards, Kyle" + }, { + "contentId" : "3318523", + "userName" : "Amir Levine", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 16, 2020 8:09 PM", + "userId" : "6278473", + "content" : "Hi Kyle, Thank you for your response. I have connected the device with 2 microUSBs, 2 power supplies and an ethernet cable. I am also seeing all these ports appearing (with FTDI drivers installed) in the device manager. I have tried to configure the IP address as shown in the video (192.168.33.30 subnet 255.255.255.0) however I am unable to ping the device afterwards, making me suspect the issue exists here as you suggested. I am using a docking station (Ethernet to USB3.0), how will this change this process? Also, I was still wondering about the temperature issue? I am hesitant to play with the device too much as it heats up very quickly (too hot to touch in less than 30min). I was wondering if you could provide any normal/expected temperature behavior for the DCA1000EVM? Best Regards, -Amir" + }, { + "contentId" : "3320059", + "userName" : "Amir Levine", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 17, 2020 10:27 PM", + "userId" : "6278473", + "content" : "Just a quick update- I am suspicious the issue is with the ethernet connection. The LEDs on the port do not light up and my computer shows \"no ethernet connection\"- Any suggestions as to what may be causing this? All other LEDs seem to be operating fine (according to /support/sensors/f/1023/t/747769?tisearch=e2e-sitesearch&keymatch=DCA1000EVM). I am using the following Ethernet docking station (works with my wifi router): https://www.amazon.com/AmazonBasics-1000-Gigabit-Ethernet-Adapter/dp/B00M77HMU0/ref=sr_1_1_sspa?crid=616QMOCM5KAT&keywords=ethernet+to+usb+adapter&qid=1583799551&s=electronics&sprefix=ethernet+to+u%2Celectronics%2C211&sr=1-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUFGR1JQMk03N0JNQTcmZW5jcnlwdGVkSWQ9QTA2Mjg4NDgzRlI0M1JCU1JJQUxTJmVuY3J5cHRlZEFkSWQ9QTAzNDQwMjkzSkxJQ0o4UkNWTjVUJndpZGdldE5hbWU9c3BfYXRmJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ== Thanks in advance -Amir" + }, { + "contentId" : "3321308", + "userName" : "Kyle Cousino", + "rankPoints" : "19220", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 2:12 PM", + "userId" : "4381542", + "content" : "mir, When it comes to configuring the IP address for use with the DCA1000EVM, you need to make sure you configure the right network connection. For example, on my PC, I see the following setup: In my case, I would modify the \"Ethernet\" connection. In the case where you have a USB to Ethernet adapter and you are connecting the DCA1000 to this adapter, your Network Connections panel might look like this: In this case, we would modify the \"Ethernet 2\" connection. This is because you are using the adapter to connect your PC to the DCA1000 and not the Ethernet adapter on your PC, should your PC have a Ethernet connector built in. I realize that not all laptops come with them. But use the example above for guidance. Please reply to this thread if you have been able to successfully resolve this issue or if there are additional questions. Regards, Kyle" + }, { + "contentId" : "3321980", + "userName" : "Amir Levine", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 9:21 PM", + "userId" : "6278473", + "content" : "Hi Kyle, My machine does not have an ethernet port. Here is the network connections tab normally (without the adapter connected): With the adapter connected: This is also how the control panel looks when I connect the ethernet tothe DCA1000. For some reason, the \"Network cable unplugged\" does not change with everything powered up and connected. The LED on the ethernet port on the DCA1000 does not light up. I do not suspect the adapter nor cable- when I connect to my wifi modem using them, the modem registers and the cable status updates. I am not quite sure how/why this is happening, any troubleshooting suggestions are greatly appreciated! Best, -Amir" + }, { + "contentId" : "3322254", + "userName" : "Kyle Cousino", + "rankPoints" : "19220", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 3:36 AM", + "userId" : "4381542", + "content" : "Amir, At this point, you need to right click on the \"Ethernet 5\" connection and modify the IPv4 address to 192.168.33.30 and set the DNS to automatic. These steps are laid out in the DCA1000 Quick Start Guide found here: /lit/ml/spruik7/spruik7.pdf Please refer to these steps. The IP address should be hard coded before connecting the DCA10000EVM to your PC and powering it on. Regards, Kyle" + }, { + "contentId" : "3324622", + "userName" : "Amir Levine", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 4:25 PM", + "userId" : "6278473", + "content" : "Hi Kyle, I have already configured the IP address, here's a screenshot of what it looks like on my end: I do not have the option to obtain DNS server automatically although it seems the same as in page 3 of the PDF you sent. I made sure to have this hardcoded before powering up the device as well. Please let me know of anything else to try. Best Regards, -Amir" + }, { + "contentId" : "3327125", + "userName" : "Kyle Cousino", + "rankPoints" : "19220", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 2:32 PM", + "userId" : "4381542", + "content" : "Amir, Your screen looks fine. You should try running the demo capture script that is included in mmWave Studio. You can find this script at this file location: C:\\ti\\mmwave_studio_02_01_00_00\\mmWaveStudio\\Scripts\\DataCaptureDemo_xWR.lua Regards, Kyle" + } ], + "tags" : [ "/support/sensors/f/1023/tags/awr20_5F00_p2_5F00_swa20_5F00_dca1000", "/support/sensors/f/1023/tags/DCA1000EVM", "/support/sensors/f/1023/tags/AWR1642BOOST" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/896636.json b/data/json/DLP/896636.json new file mode 100644 index 0000000000000000000000000000000000000000..16a227b98986d061550d4f21d29e4f5ce2519a82 --- /dev/null +++ b/data/json/DLP/896636.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "896636", + "reporterName" : "Mary Raullette Solomo", + "rankPoints" : "470", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "IWR1843BOOST: Traffic Monitoring Demo Crash", + "rankName" : "Intellectual", + "replies" : " 6", + "views" : " 50", + "queryText" : "Part Number: IWR1843BOOST Hi, We are evaluating IW1843 3D Traffic Monitoring demo and we found out it always crashes after running for some time (half an hour to two hours). Powerdown recovers it. We used the demo in mmwave_industrial_toolbox_4_2_0. Do you have any idea about what causes the crashes? Thanks", + "partNumber" : " IWR1843BOOST", + "allResponseList" : [ { + "contentId" : "3314682", + "userName" : "Mary Raullette Solomo", + "rankPoints" : "470", + "rankName" : "Intellectual", + "date" : "Apr 14, 2020 3:27 AM", + "userId" : "5324281", + "content" : "I would like to add. We are also encountering a more serious issue wherein the sensor doesn't start after successfully sending the CFG file. The sensorStart command seems like breaks the USB connection and will reconnect. And then the matlab GUI will crash after this. Even if we power down the device multiple times, it cannot for a while. Note that we are using thecompany default config and demo. Is it somehow related to hardware?" + }, { + "contentId" : "3315380", + "userName" : "AmandaN", + "rankPoints" : "11910", + "rankName" : "Genius", + "date" : "Apr 14, 2020 2:46 PM", + "userId" : "5084791", + "content" : "Hello Mary, Can you provide the log txt file from a time when it crashed after 30 min? Can you also provide the log txt frile from thwen the sensor doesn't start after sending the cfg file? In the case of not starting after sending the cfg file: Are you using executable pre-compiled GUI or the MATLAB source? It may be the case that in the executable if for some reason you had an issue where it crashed previously then the GUI was not able to release the data COM port correctly as it would after a normal exit. Then the COM port would be unavailable and cause the GUI to crash. If this occurs can you try restarting your PC (which forces all ports to be released) and starting the demo again Amanda" + }, { + "contentId" : "3323724", + "userName" : "Mary Raullette Solomo", + "rankPoints" : "470", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 3:13 AM", + "userId" : "5324281", + "content" : "Hello, I'm using the pre-compiled GUI. Attached is the log file when it crashed after running for some time. We've also noticed that crash will occur when initially we have the demo running with the device facing up, and when we move it try to move the device to face sideways and the gui will hang up. The log file doesn't log this error though. It will just completely stop. This is repatable. I also tried not running the GUI and just stream the data output in realterm. When we move the device, the data streamout in realterm will stop. So I guess, it's the firmware that crashes.For the USB issue, I will get back to you.5807.tm_console_log_21042020.txt" + }, { + "contentId" : "3324035", + "userName" : "Mary Raullette Solomo", + "rankPoints" : "470", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 9:37 AM", + "userId" : "5324281", + "content" : "I managed to find the line of code (CCS project) where the device hangs up when it is moved. It's the lines: objectdetection.c 1986: DPC_Objdet_Assert(objDetObj->dpmHandle, (objDetObj->interSubFrameProcToken == 0)); and objdetrangehwa.c 646: DPC_Objdet_Assert(objDetObj->dpmHandle, (objDetObj->interSubFrameProcToken == 0)); To quickly check, I tried to skip these assert lines by modifying objectdetectioninternal.h into: #define DPC_Objdet_Assert(handle, expression) //#define DPC_Objdet_Assert(handle, expression) { \\ // _DPC_Objdet_Assert(handle, expression, \\ // __FILE__, __LINE__); \\ // DebugP_assert(expression); \\ // } Somehow, it still looks like the demo works even though I move the device and the crash will not occur. I haven't tested the long time run yet (the other issue that I mentioned). However, I'm not sure if this is a deployable solution or how skipping this line affects other functionalities. Please help." + }, { + "contentId" : "3326193", + "userName" : "AmandaN", + "rankPoints" : "11910", + "rankName" : "Genius", + "date" : "Apr 23, 2020 8:00 PM", + "userId" : "5084791", + "content" : "The issue causing the crash was when you're moving the sensor yourself there are too many points being generated because to the sensor it appears the entire scene is moving. When there are too many points you may run out of time to complete the processing and output by UART before the chirping and processing begins for the next frame. You've removed the check that the processing has completed before beginning the next frame. I would recommend instead that you issue a sensorStop before moving the sensor so that this error doesn't occur or increase the available time by increasing the frame period or reducing the maximum number of detected points. Amanda" + }, { + "contentId" : "3326517", + "userName" : "Mary Raullette Solomo", + "rankPoints" : "470", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 2:09 AM", + "userId" : "5324281", + "content" : "Thanks for your suggestions. I will try that. In limiting the number of points, I want to confirm that you are referring to this line in the config file: trackingCfg 1 2 1000 20 67 105 50 How is the device selecting the X number of points to process in a given scene with a lot more points than the limit? By distance, snr, etc?" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR1843BOOST" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/896658.json b/data/json/DLP/896658.json new file mode 100644 index 0000000000000000000000000000000000000000..6f5ae2c3c6817a9384584edc9d18ab8b91a9ba1e --- /dev/null +++ b/data/json/DLP/896658.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "896658", + "reporterName" : "Simba Su", + "rankPoints" : "70", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ25890H: BQ25890H USE？", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 21", + "queryText" : "Part Number: BQ25890H Our company USES TI's charging chip model BQ25890H, According to the design, the NTC is 10K, and the NTC resistance used by our battery is 100K The specification states that the values of RT1 and RT2 can be calculated to match the resistance of NTC, Please provide the resistance values of RT1 and RT2 at NTC=100K. I want to konw the formula is fixed，I just change the valve NTC？ others：can you provide the value of Vregn？", + "partNumber" : " BQ25890H", + "allResponseList" : [ { + "contentId" : "3316022", + "userName" : "Ning T", + "rankPoints" : "15365", + "rankName" : "Genius", + "date" : "Apr 15, 2020 12:26 AM", + "userId" : "145100", + "content" : "Hi, For RT1 and RT2 calculation, please refer to the calculator at /lit/zip/slurax7 and plug in the specified thermistor information accordingly. Thanks, Ning." + }, { + "contentId" : "3316056", + "userName" : "Simba Su", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 15, 2020 1:19 AM", + "userId" : "5879907", + "content" : "sorry i can open it，Can you provide additional links or solutions？" + }, { + "contentId" : "3322253", + "userName" : "Ning T", + "rankPoints" : "15365", + "rankName" : "Genius", + "date" : "Apr 21, 2020 3:33 AM", + "userId" : "145100", + "content" : "Hi, Please refer to the attached. bq2589x calculation tools_1V1.xls Thanks, Ning." + } ], + "tags" : [ "/support/power-management/f/196/tags/bq25890H" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/896725.json b/data/json/DLP/896725.json new file mode 100644 index 0000000000000000000000000000000000000000..39c80a263b1ccbc6f7d5b9941fe1472ec2fc3609 --- /dev/null +++ b/data/json/DLP/896725.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "896725", + "reporterName" : "Ian Wang", + "rankPoints" : "15535", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ25896: BQ25896 I2C", + "rankName" : "Genius", + "replies" : " 3", + "views" : " 19", + "queryText" : "Part Number: BQ25896 Hi Sir, If MCU working voltage is 2.0V, Can BQ25896 support I2C interface? Thanks, Ian.", + "partNumber" : " BQ25896", + "allResponseList" : [ { + "contentId" : "3316035", + "userName" : "Ning T", + "rankPoints" : "15365", + "rankName" : "Genius", + "date" : "Apr 15, 2020 12:48 AM", + "userId" : "145100", + "content" : "Ian, When VBUS rises above VVBUS_UVLOZ (3.6V minimum) or BAT rises above VBAT_UVLOZ (2.3V minimum), the sleep comparator, battery depletion comparator and BATFET driver are active. I 2C interface is ready for communication and all the registers are reset to default value. Thanks, Ning." + }, { + "contentId" : "3316318", + "userName" : "Ian Wang", + "rankPoints" : "15535", + "rankName" : "Genius", + "date" : "Apr 15, 2020 7:09 AM", + "userId" : "12993", + "content" : "Hi Guy, Below Pin voltage level is based on VCC2 (2.0V), is it? STAT, /PG,SCL,SDA,CHG_INT" + }, { + "contentId" : "3323592", + "userName" : "Ning T", + "rankPoints" : "15365", + "rankName" : "Genius", + "date" : "Apr 22, 2020 12:42 AM", + "userId" : "145100", + "content" : "Ian, VCC2 is the pull-up source. The BQ25896 needs valid power either at VBUS or VBAT as the specs shown in the earlier message in order to support I2C communication. Thanks, Ning." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25896" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/896752.json b/data/json/DLP/896752.json new file mode 100644 index 0000000000000000000000000000000000000000..6848a71a3edd8038f7e8b4d095dda0297be93316 --- /dev/null +++ b/data/json/DLP/896752.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "896752", + "reporterName" : "Datïan", + "rankPoints" : "720", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS62175: Fail to output 5V", + "rankName" : "Intellectual", + "replies" : " 12", + "views" : " 76", + "queryText" : "Hi, I use TPS62175DQCR converting 24V DC to 5V DC to power the RS-485 signal chain block with reference to TIDM-1005 REV E1. It doesn't work. I measured voltages at different pins. The voltages at pins of VIN and EN are 24.35V. The voltages at pins of VOS and SLEEP are 0.08V. I can not find the reason. Please help me to find out something wrong or missing in my design. My schematic chart and pcb layout are shown as below. best regards Datïan", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3315243", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Apr 14, 2020 1:12 PM", + "userId" : "24596", + "content" : "Datian, The layout is not sufficient for a switching power supply. It will need to be re-done. Please see the layout guidelines and example in the datasheet." + }, { + "contentId" : "3315359", + "userName" : "Datïan", + "rankPoints" : "720", + "rankName" : "Intellectual", + "date" : "Apr 14, 2020 2:35 PM", + "userId" : "5912755", + "content" : "Hi John, Many thanks for your help. I'm a newbie to this work. Do you mean I need to make my layout as identical as possible to the recommend example illustrated as figure 62 in datasheet of shown as below? And do you think my schematic is correct, especially the resistors connected to pin of FB ? The value of resistors are 787K and 150K ohm in section 9.3.3.1 of data-sheet. However, the respective value of resistors are 2M and 383K ohm in schematic of TIDM-1005 REV E1. kind regards Datïan" + }, { + "contentId" : "3316672", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Apr 15, 2020 1:13 PM", + "userId" : "24596", + "content" : "Datian, Yes you should follow those layout guidelines. Switching converters require a specific layout technique of both component placement and routing of traces and copper pour areas. In addition to the above picture, you should also include a dedicated ground plane on an internal or bottom side layer. Make sure to include some thermal bias for the thermal pad to connect to this GND plane. Please see the EVM users guide for more details /.../SLVU743. Your schematic looks ok." + }, { + "contentId" : "3317411", + "userName" : "Datïan", + "rankPoints" : "720", + "rankName" : "Intellectual", + "date" : "Apr 16, 2020 12:59 AM", + "userId" : "5912755", + "content" : "John, Thank you very much. I'll redo it. Warm Regards Datïan" + }, { + "contentId" : "3319350", + "userName" : "Datïan", + "rankPoints" : "720", + "rankName" : "Intellectual", + "date" : "Apr 17, 2020 12:05 PM", + "userId" : "5912755", + "content" : "Hi John, I'v redone my layout for a small part of TPS62175 in my original design. Would you mind to have a glance at my layout ? Regards Datïan" + }, { + "contentId" : "3319561", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Apr 17, 2020 2:44 PM", + "userId" : "24596", + "content" : "Data, It is probably much better, but it is difficult to tell from the individual pictures. Can you stack them?" + }, { + "contentId" : "3320145", + "userName" : "Datïan", + "rankPoints" : "720", + "rankName" : "Intellectual", + "date" : "Apr 18, 2020 1:58 AM", + "userId" : "5912755", + "content" : "John, Thank you very much. Do you think it is necessary to enlarge the area of copper on top layer ? The size of this two-layer board is 6cm * 6cm. The thickness of copper is 1 oz. Best Regards Datïan" + }, { + "contentId" : "3320320", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Apr 18, 2020 4:09 PM", + "userId" : "24596", + "content" : "Datian, I think that all looks ok. Let me know how it works when you get it built." + }, { + "contentId" : "3320409", + "userName" : "Datïan", + "rankPoints" : "720", + "rankName" : "Intellectual", + "date" : "Apr 19, 2020 7:35 AM", + "userId" : "5912755", + "content" : "John, Sure, I will. Looks like weekend can not stop you from work as me :p Best Regards Datïan" + }, { + "contentId" : "3328053", + "userName" : "Datïan", + "rankPoints" : "720", + "rankName" : "Intellectual", + "date" : "Apr 26, 2020 9:45 AM", + "userId" : "5912755", + "content" : "Hi John, It works. The leds are lighted by 5V. Thank you very much for your powerful help. Do you think it is possible to reduce the area of copper if I choose 2oz as thickness of copper ?" + } ], + "tags" : [ "/support/power-management/f/196/tags/dc_2F00_dc%2bconverter", "/support/power-management/f/196/tags/TIDM_2D00_1005", "/support/power-management/f/196/tags/tps62175" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/896786.json b/data/json/DLP/896786.json new file mode 100644 index 0000000000000000000000000000000000000000..ab91678f47c309f10826bb4d6486935f79e1d238 --- /dev/null +++ b/data/json/DLP/896786.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "896786", + "reporterName" : "ACGUY", + "rankPoints" : "8155", + "resolutionStatus" : "Resolved", + "ticketName" : "LM74670-Q1: Replacement from diode bridge for low voltage (AC24V) input", + "rankName" : "Mastermind", + "replies" : " 6", + "views" : " 37", + "queryText" : "Part Number: LM74670-Q1 Hello E2E, We suggested the LM74670 to customer for change from diode bridge. The input voltage of target equipment is 24V-AC. Customer was drew schematic on TINA-TI, but it's can't runing. Doescompany have a simulation file for AC input bridge circuit? or, Cancompany point out the mistakes on the file? Regards, ACGUY test-2.TSC", + "partNumber" : " LM74670-Q1", + "allResponseList" : [ { + "contentId" : "3316290", + "userName" : "Karikalan Selvaraj", + "rankPoints" : "13870", + "rankName" : "Genius", + "date" : "Apr 15, 2020 6:29 AM", + "userId" : "1601212", + "content" : "Hello, Thank you for your interest in LM74670-Q1 for diode bridge rectifier. I am looking into the TINA-TI simulation file, but would need some of the application information to simulate. What is maximum AC voltage and frequency of interest? Due to heavy influx of questions, allow us time till end of the week to get back. However, if you are really in a hurry, let us know we will try our best to support. Regards, Kari." + }, { + "contentId" : "3319595", + "userName" : "Karikalan Selvaraj", + "rankPoints" : "13870", + "rankName" : "Genius", + "date" : "Apr 17, 2020 3:05 PM", + "userId" : "1601212", + "content" : "Hello, I am working on this simulation and will get back as communicated by end of this week. Regards, Kari." + }, { + "contentId" : "3320417", + "userName" : "Karikalan Selvaraj", + "rankPoints" : "13870", + "rankName" : "Genius", + "date" : "Apr 19, 2020 8:20 AM", + "userId" : "1601212", + "content" : "Hello, I am able to run the simulation using the TINA file you have shared, but it is taking longer time due to 1uF used for VCAP. For the MOSFET chosen, 100nF can be used for C1,C2,C3 and C4. C5 capacitor also need to sized based on the maximum and minimum AC frequency and load current (maximum) Can you share the details, so that we can recommend C5? Regards, Kari." + }, { + "contentId" : "3320859", + "userName" : "ACGUY", + "rankPoints" : "8155", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 7:20 AM", + "userId" : "4372849", + "content" : "Hello Kari, Thank you for your reply. Application is power supply unit for amusement equipment. Related information and idea circuit block can be found at the following URL. /.../894934 Maximum input voltage is 26V that the voltage was changed by transformer from generally AC-inputted. Maximum output power is 300W. I want to replace from diode to LM74670 on customer's board. Please your cooperation. Best regards, ACGUY" + }, { + "contentId" : "3321109", + "userName" : "Karikalan Selvaraj", + "rankPoints" : "13870", + "rankName" : "Genius", + "date" : "Apr 20, 2020 11:58 AM", + "userId" : "1601212", + "content" : "Hello, For 50/60Hz, LM74670 would work and can drive MOSFETs capable of handling 300W maximum power. Let me get back on the minimum hold up capacitance required at the output after the diode rectifier. Regards, Kari." + }, { + "contentId" : "3323334", + "userName" : "Karikalan Selvaraj", + "rankPoints" : "13870", + "rankName" : "Genius", + "date" : "Apr 21, 2020 7:09 PM", + "userId" : "1601212", + "content" : "Hi For 300W rectification on 24V AC supply, minimum 5mF of output capacitance is required after diode bridge when using LM74670-Q1 for rectification to work. Regards, Kari." + } ], + "tags" : [ "/support/power-management/f/196/tags/LM74670_2D00_Q1", "/support/power-management/f/196/tags/tina_2D00_ti" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/896830.json b/data/json/DLP/896830.json new file mode 100644 index 0000000000000000000000000000000000000000..b171331e0ef4e14c87750b1044d1d6a51f364761 --- /dev/null +++ b/data/json/DLP/896830.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "896830", + "reporterName" : "Ahsan Ameen", + "rankPoints" : "80", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "WEBENCH® Tools/TPSM53603: TPSM53603 Simulation models", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 35", + "queryText" : "Part Number: TPSM53603 Tool/software: WEBENCH® Design Tools Hicompany team! I know TPSM53603 simulation models are not available. Now I'm confused for 28V to 3.3V/3A,Which one i should use TPSM53603 or LMZM33603. Can i got simulation models of TPSM53603. I know w.r.t. size TPSM53603 is better. Please guide me with respect to EMI which one is better LMZM33603 or TPSM53603 because LMZM33603 is operating at low frequency than TPSM53603.So I think LMZM33603 is better w.r.t. EMI. Please guide me. Thanks and regards", + "partNumber" : " TPSM53603", + "allResponseList" : [ { + "contentId" : "3315816", + "userName" : "Jimmy Hua", + "rankPoints" : "17640", + "rankName" : "Genius", + "date" : "Apr 14, 2020 7:57 PM", + "userId" : "4798049", + "content" : "Hi Ahsan, If we were to compare the TPSM53603 (Figure 48) radiated EMI with the LMZM33603 (Figure 43) radiated EMI, the assumption that the LMZM33603 has better EMI performance than the TPSM53603 can be made since as you pointed out the LMZM33603 is operating at a lower frequency. There is no way to simulate EMI other than to base the assertion on the datasheet specifications. These radiated EMI result are from the actual standard EVM and tested at a local EMI chamber for accuracy. For thermals and size, I would suggest using the TPSM53603. You can also put a LDO at the end of the TPSM53603 to provide a clean output voltage with low noise. Here is an app note for reference. Regards, Jimmy" + }, { + "contentId" : "3316423", + "userName" : "Ahsan Ameen", + "rankPoints" : "80", + "rankName" : "Prodigy", + "date" : "Apr 15, 2020 8:57 AM", + "userId" : "6261582", + "content" : "Thank you Jimmy for your reply. But can I access any simulation models of TPSM53603? Thanks and regards" + }, { + "contentId" : "3317004", + "userName" : "Jimmy Hua", + "rankPoints" : "17640", + "rankName" : "Genius", + "date" : "Apr 15, 2020 4:53 PM", + "userId" : "4798049", + "content" : "There may be some work being done on the TPSM53603 device on WEBENCH designer to accurately match the datasheet component selection recommendation. This may be the reason why you are not able to simulate on WEBENCH designer right now. I would give this some time for the internal WEBENCH team to fix. It should be back up soon for simulation purposes. Regards, Jimmy" + }, { + "contentId" : "3323462", + "userName" : "Jimmy Hua", + "rankPoints" : "17640", + "rankName" : "Genius", + "date" : "Apr 21, 2020 9:04 PM", + "userId" : "4798049", + "content" : "Hi Ahsan, I haven't heard back from the team yet. I have pinged the again to get a status update on this. If I get any more information, I'll let you know. Regards, Jimmy" + } ], + "tags" : [ "/support/power-management/f/196/tags/WEBENCH_AE00_%2bDesign%2bTools", "/support/power-management/f/196/tags/TPSM53603", "/support/power-management/f/196/tags/LMZM33603", "/support/power-management/f/196/tags/LMZM33603%2bVS%2bTPSM53603" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/896834.json b/data/json/DLP/896834.json new file mode 100644 index 0000000000000000000000000000000000000000..045ebc8b8b23b938a4413c8dcec3bd493e2412b6 --- /dev/null +++ b/data/json/DLP/896834.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "896834", + "reporterName" : "Riccardo Masinari", + "rankPoints" : "30", + "resolutionStatus" : "Resolved", + "ticketName" : "Request informations difference of devices", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 28", + "queryText" : "Hello I need a clarification on a device, we are currently using a device code: TPS2041AD I saw on the site that you give the code: TPS2042BD as an alternative to this. Do you have a document where it describes the main differences? I need to understand if I can use TPS2042BD on my application which previously provided the TPS2041AD many thanks Riccardo", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3322219", + "userName" : "Ziv Zhang", + "rankPoints" : "4685", + "rankName" : "Expert", + "date" : "Apr 21, 2020 2:44 AM", + "userId" : "5039499", + "content" : "Hi Riccardo, TPS2042AD is NRND which means off shelf. You can use TPS2042BD instead which only the craft difference. For TI's policy, I will first click resolved button. If you have any other concern, contact me any time. If you think resolved, please help click 'Issue is solved button'. Thanks." + }, { + "contentId" : "3322361", + "userName" : "Riccardo Masinari", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 6:07 AM", + "userId" : "4598987", + "content" : "Thanks for the replies the answers are enough thanks. I decided to try the device in modod id to be sure that I have no problems. Is it possible to have a TPS2042BD sampling so that I can verify it? On the website I searched but the samples did not find I could order them. thanks a lot Riccardo" + }, { + "contentId" : "3322473", + "userName" : "Ziv Zhang", + "rankPoints" : "4685", + "rankName" : "Expert", + "date" : "Apr 21, 2020 7:45 AM", + "userId" : "5039499", + "content" : "Hi Riccardo, See below link: https://tisamples./order/tisamples/en/search/?text=TPS2042BD&searchType= /store/ti/en/p/product/?p=TPS2042BD" + }, { + "contentId" : "3322545", + "userName" : "Riccardo Masinari", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 9:11 AM", + "userId" : "4598987", + "content" : "Ok perfect i have order the device perfect thanks" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS2042BD%2b%2bTPS2041AD" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/896948.json b/data/json/DLP/896948.json new file mode 100644 index 0000000000000000000000000000000000000000..551102af28dbfc66a44a5e99250d4cea7249284f --- /dev/null +++ b/data/json/DLP/896948.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "896948", + "reporterName" : "Utpal Parrikar", + "rankPoints" : "20", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS2121: Using this for selecting 2 different 24V supply voltages", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 30", + "queryText" : "Part Number: TPS2121 The absolute ratings for TPS2121 indicates maximum input voltages of 24V. However, the recommended operational maximum voltage is 22V. I want to use this device to switch between two 24V power supplies with device configured for automatic switchover to power supply on input 2 in case of failure or removal of power supply on input 1. Will this be safe to do in the long run? The continuous load current will be around 3A, which can intermittently go upto 4A for few hundred milliseconds. The device is expected to power a medical device with expected continuous operation of many days. Thanks. Utpal", + "partNumber" : " TPS2121", + "allResponseList" : [ { + "contentId" : "3316010", + "userName" : "Andy Robles", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 15, 2020 12:01 AM", + "userId" : "6043129", + "content" : "Hi Utpal, As 24V is exceeding the recommended operating conditions of the device I would not recommend using it in your application. Operating the device at the absolute maximum rating conditions for extended periods may affect device reliability. I believe we may have an e-fuse device, TPS2663, than may be able to handle this application with integrated MOSFETs. I will reassign the thread and someone will get back to you on the possible implementation of the TPS2663 in your application. Best regards, Andy Robles" + }, { + "contentId" : "3316230", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 15, 2020 5:32 AM", + "userId" : "4743883", + "content" : "Hi Utpal, TPS2663 can be used as per Figure 53 in the datasheet for power muxing two supply rails. Regards, Rakesh" + }, { + "contentId" : "3326936", + "userName" : "Utpal Parrikar", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 11:28 AM", + "userId" : "4204438", + "content" : "Thanks, I have designed circuit accordingly. Both my VIN and VSYS24 is 24V. Can you let me know what are design requirements for components marked in red circle. I am assuming when my main supply VIN is available you are putting the eFuse of auxillary supply (VSYS24) in overvoltage protection state, there by switching that power off from VOUT. Correct?" + }, { + "contentId" : "3328283", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 5:02 AM", + "userId" : "4743883", + "content" : "Hi Utpal, Thanks for considering TPS2663. Yes, Your understanding is correct, OVP is used to keep the auxiliary power path in OFF mode. The VGS rating for Q3, Q5 should be 20V. Please refer Section \"10.2.2.6 Selecting Q1, Q2 and TVS Clamp for Surge Protection\" in the datasheet. The Q1 FET in your schematic works as source follower of the dVdT voltage of channel-1 (U2). The Vds rating of Q1 should be > max operating voltage of VSYS24. I suggest to use 50V rated FET. Regarding R13:- Higher value would help reduce the shunt current from VSYS24. Use 100kOhm for R13. Regards, Rakesh" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS2121" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/896982.json b/data/json/DLP/896982.json new file mode 100644 index 0000000000000000000000000000000000000000..5e2c5427bf7d10f865360b890d238a72a64f51d9 --- /dev/null +++ b/data/json/DLP/896982.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "896982", + "reporterName" : "Floris Vernieuwe", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM25180: I can't get it to function properly", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 33", + "queryText" : "Part Number: LM25180 There is something wrong with the circuit but I cannot figure out what. The expected output voltage is 15V but the output i have is unregulated and changes based on the input voltage. (When the input voltage is 12V the output voltage is 10V) The switching frequency is stuck at 10-12 kHz. (It causes an audible high pitch) When i add a load of 220 ohm the output stops working . I have the same behaviour with all 3 of the modules I made. Can somebody help me? Below is my schematic: Below is the wave measured on the SW pin.", + "partNumber" : " LM25180", + "allResponseList" : [ { + "contentId" : "3316206", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 15, 2020 5:04 AM", + "userId" : "3498075", + "content" : "Hi Floris, Did you design the circuit based on LM25180 Calculator: /tool/LM25180DESIGN-CALC Did you design the PCB layout by referring to LM25180EVM? I suggest you to apply one EVM and modify the circuit for your application. B R Andy" + }, { + "contentId" : "3320362", + "userName" : "Floris Vernieuwe", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 18, 2020 9:14 PM", + "userId" : "6188313", + "content" : "Yes I designed the circuit based on the calculator I did not follow the evaluation module for the evaulaution module. But i did try to make de high-frequency signal paths short and keep de capacitors close. I worked with a bottom grondplane, maybe that is the problem?" + }, { + "contentId" : "3322239", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 21, 2020 3:13 AM", + "userId" : "3498075", + "content" : "Hi Floris, The layout is not bad. Do you use MBR0520 on D6? this diode will block Vin-max plus Vout if XFMR has 1:1 ratio, so it should be 50V diode at Vin=24V, pls try it with 0.5A 100V diode. B R Andy" + }, { + "contentId" : "3323331", + "userName" : "Timothy Hegarty", + "rankPoints" : "13220", + "rankName" : "Genius", + "date" : "Apr 21, 2020 7:07 PM", + "userId" : "1877696", + "content" : "Hi Floris, As Andy mentioned, the flyback diode should be higher voltage rating, either 60V or 100V (also depending on the leakage ringing). Also, the LM25180 has a peak current limit of 1.5A typical, hence why we recommend using a transformer with 2A sat current. In addition, 1uF is quite low for the input cap, try 10uF/50V. The output power is quite low here, 1.5W, so the LM5181 is generally more suitable (the peak primary current is 50% or 0.75A). In fact, the LM5181 is more aligned with your existing transformer with high mag inductance of 60uH and sat current of 1A. Take a look at the datasheet and quickstart calculator for that part - it is pin compatible with the LM25180. Regards, Tim" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM25180" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/896999.json b/data/json/DLP/896999.json new file mode 100644 index 0000000000000000000000000000000000000000..f3461400ebdfd1d188cee694d65b139a3d599a40 --- /dev/null +++ b/data/json/DLP/896999.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "896999", + "reporterName" : "Sarumathi R", + "rankPoints" : "120", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC2897A: Control driven rectification", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 21", + "queryText" : "Part Number: UCC2897A Hi, We are going to use PMP4844 design for our power requirement Vin 20-32V vout:24V Iout:5A. In PMP4844 control driven rectification is used. I am calculated the sync rectifier's power loss calculation and no of mosfets to be used based on the below link. /lit/an/slua535a/slua535a.pdf . This design guide have only self driver rectifier calculation, if I calculate the no of mosfet with is formulas, i get value like <0.5, but in the design 2 mosfets are used. Is there any separate power loss calculation for control driven sync rectification?", + "partNumber" : " UCC2897A", + "allResponseList" : [ { + "contentId" : "3316772", + "userName" : "Colin Gillmor", + "rankPoints" : "22565", + "rankName" : "Mastermind", + "date" : "Apr 15, 2020 2:19 PM", + "userId" : "1139376", + "content" : "Hi Sarumathi I don't know of any design guides that directly answer your question but you might take a look at https://www.infineon.com/dgdl/Infineon-MOSFET_OptiMOS_improving_efficiency_of_synchronous_rectification_by_analysis_of_the_MOSFET_power_loss_mechanism-AN-v03_00-EN.pdf?fileId=db3a304320d39d590121a671f2d90c38 which is an analysis of the MOSFET losses. The losses in the driver can be calculated according to the information in the DS - for example if you use the TPS28225 device Figure15 is a graph of driver Dissipated Power vs Switching Frequency. Hope this helps - please let us know if you have any further questions. Regards Colin" + }, { + "contentId" : "3322616", + "userName" : "Colin Gillmor", + "rankPoints" : "22565", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 10:14 AM", + "userId" : "1139376", + "content" : "Hi Sarumathi It's been a while since we heard from you so I'll assume you have been able to resolve your issue and I'm closing this post. You can always open a new, linked post if you wish to. Regards Colin" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC2897A", "/support/power-management/f/196/tags/PMP4844" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897004.json b/data/json/DLP/897004.json new file mode 100644 index 0000000000000000000000000000000000000000..26c3dcf5d50c100713d56f1f2eb5b2d44ee7df21 --- /dev/null +++ b/data/json/DLP/897004.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "897004", + "reporterName" : "2018", + "rankPoints" : "2330", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ25611D: We ran into this problem when using the TINA simulation tool to simulate bq25611d (ERC error specification check, kept warning this error) and could not simulate", + "rankName" : "Expert", + "replies" : " 5", + "views" : " 36", + "queryText" : "Part Number: BQ25611D We ran into this problem when using the TINA simulation tool to simulate bq25611d (ERC error specification check, kept warning this error) and could not simulate", + "partNumber" : " BQ25611D", + "allResponseList" : [ { + "contentId" : "3317231", + "userName" : "Hong Mao", + "rankPoints" : "4010", + "rankName" : "Expert", + "date" : "Apr 15, 2020 8:17 PM", + "userId" : "4779728", + "content" : "Hi, may I ask where you got this tool?" + }, { + "contentId" : "3319642", + "userName" : "Hong Mao", + "rankPoints" : "4010", + "rankName" : "Expert", + "date" : "Apr 17, 2020 3:28 PM", + "userId" : "4779728", + "content" : "Hi, the tool is not supported with this device. Thanks." + }, { + "contentId" : "3321304", + "userName" : "user5274383", + "rankPoints" : "10", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 2:11 PM", + "userId" : "5274383", + "content" : "I now need the macro model of BQ25661D" + }, { + "contentId" : "3321874", + "userName" : "Hong Mao", + "rankPoints" : "4010", + "rankName" : "Expert", + "date" : "Apr 20, 2020 7:42 PM", + "userId" : "4779728", + "content" : "Did you mean BQ25611D? BQ25611D TINA simulation is not supported." + }, { + "contentId" : "3321973", + "userName" : "Hong Mao", + "rankPoints" : "4010", + "rankName" : "Expert", + "date" : "Apr 20, 2020 9:12 PM", + "userId" : "4779728", + "content" : "BQ25611D SPICE model is not available. Battery chargers are very complicated with many control loops and operating modes. And the charger behaviors also dependent on battery characteristics. It is more efficient to do hardware evaluation. We will provide the technical support for the hardware development if there are questions." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25611D" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897006.json b/data/json/DLP/897006.json new file mode 100644 index 0000000000000000000000000000000000000000..4278602624fc72a06224c5608962a0025b3e178c --- /dev/null +++ b/data/json/DLP/897006.json @@ -0,0 +1,79 @@ +{ + "ticketNumber" : "897006", + "reporterName" : "Jianping", + "rankPoints" : "550", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "CCS/LM34936: PD charge fail on 5370 of Dell and Y9000K of Lenovo", + "rankName" : "Intellectual", + "replies" : " 8", + "views" : " 41", + "queryText" : "Part Number: LM34936 Tool/software: Code Composer Studio Hi,TI's expert: we're run into a trouble for the output capacitor choose and confirm the RC network of comp pin of LM34936 becuase it's PD charge fail on Dell_5370(inrush issue,see the capture1) when using low ESR(30mR) capacitor or re-work the RC network(R683 to 3.3K ,C482 to 300pF of comp pin , special the temperature rise to 57°C,the issue more terrible. if change the E- capacitor(EC13 on our shcematic) to above ESR.150mR, the 5370 of NB charge normal.but the Y9000K(Y900K,20V/5A) fail(detail see the below captures) i tried tune the RT/SYNC pin and COMP pin on LM34936,but get the result didn't compatibility them（Dell_5370 and Lenovo_Y9000K). as below circuit show to you reference. kindly advise you give me some comment or solution for the issue. thanks! 5370 of Dell charge OK when using the E-cap of Higher ESR(above 150mR) Y9000K charge fail when change E-cap of High ESR(above 150mR) on output power path. the Y9000K of NB charge OK when re-work the RC network of Comp pin of LM34936 and E-cap of Higher ESR(above 150mR) or change the E-cap of Lower ESR(30mR),it's same as effect(charge OK) the 5370 of NB charge fail when re-work the RC network of Comp pin of LM34936 and E-cap of Higher ESR(above 150mR) or change the E-cap of Lower ESR(30mR),it's same as effect(charge fail)", + "partNumber" : " LM34936", + "allResponseList" : [ { + "contentId" : "3316109", + "userName" : "Jianping", + "rankPoints" : "550", + "rankName" : "Intellectual", + "date" : "Apr 15, 2020 2:31 AM", + "userId" : "5350877", + "content" : "Hi,TI's Expert: our PD solution has TPS65987D, the interal power switch was withsatand 10A inrush max. the spec,you can download it from as below link. thanks!" + }, { + "contentId" : "3316368", + "userName" : "Jianping", + "rankPoints" : "550", + "rankName" : "Intellectual", + "date" : "Apr 15, 2020 7:58 AM", + "userId" : "5350877", + "content" : "Hi,TI's expert: sorry for lost the schematic upload." + }, { + "contentId" : "3317184", + "userName" : "Garrett Roecker", + "rankPoints" : "18240", + "rankName" : "Mastermind", + "date" : "Apr 15, 2020 7:40 PM", + "userId" : "3456925", + "content" : "Hi Jianping, Sorry to hear you are having issue with your schematic. I have a few questions that should help me understand what is happening. 1. What is the input voltage during this operation? 2. Please confirm the switching frequency of the LM34936. It looks like there might be a few options. 3. What is the maximum load current for each of the 4 output voltages in the application Thanks, Garrett" + }, { + "contentId" : "3317427", + "userName" : "Jianping", + "rankPoints" : "550", + "rankName" : "Intellectual", + "date" : "Apr 16, 2020 1:25 AM", + "userId" : "5350877", + "content" : "Hi,Garrett: thanks you reply! 1. the input voltage has 19v DC from adaptor. 2. the frequency be follow EVM of LM34936, it's 300K.(but i chang it to 380K if fix the issue) 3. the 5V,9V,12V 15V maximum current 3A; the 20V loading max 5A;" + }, { + "contentId" : "3320628", + "userName" : "Jianping", + "rankPoints" : "550", + "rankName" : "Intellectual", + "date" : "Apr 20, 2020 2:26 AM", + "userId" : "5350877", + "content" : "Hi,Garrett: do you have any updated for the issue?" + }, { + "contentId" : "3321804", + "userName" : "Garrett Roecker", + "rankPoints" : "18240", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 6:43 PM", + "userId" : "3456925", + "content" : "Hi Jianping, I have been working with your localcompany field engineer on this issue. As to not duplicate the effort I am going to close this thread. From the LM34936 stand point it looked like the loop compensation needed tuned for the application. Thanks, Garrett" + }, { + "contentId" : "3322123", + "userName" : "Jianping", + "rankPoints" : "550", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 12:51 AM", + "userId" : "5350877", + "content" : "Hi,Grrett: may you share the AE information to me for contact them? regarding loop compensation tune methodology, could you share some document of LM34936 to us for study ? thanks!" + }, { + "contentId" : "3323310", + "userName" : "Garrett Roecker", + "rankPoints" : "18240", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 6:50 PM", + "userId" : "3456925", + "content" : "Hi Jianping, I am working with Antony Lin. To estimate the loop of the LM34936, I suggest using the LM5176 quick-start calculator The LM5176 and LM34936 have have the same control loop architecture so the quick-start calculator can be used interchangeably. Thanks, Garrett" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM34936", "/support/power-management/f/196/tags/code%2bComposer%2bstudio" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897029.json b/data/json/DLP/897029.json new file mode 100644 index 0000000000000000000000000000000000000000..14cbc2b59e0e8af79420660a1a3fade8a6c73e6e --- /dev/null +++ b/data/json/DLP/897029.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "897029", + "reporterName" : "HanDong", + "rankPoints" : "30", + "resolutionStatus" : "Resolved", + "ticketName" : "IWR1843: Can SCI B used for both transmit and receive?", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 48", + "queryText" : "Part Number: IWR1843 I want to use both SCI-A and SCI-B as standard UART interface for transmit and receive. But when I check the UART driver in mmwave_sdk_03_03_00_03, it mentioned: SCIB can only used as TX-only. see below for your reference. I want to ask whether this is only \"driver\" limitation? or the silicon has some physical limitation, like SCIB do not contains receive block inside. If it is \"driver\" limitation, can I just simpliy modify SCIB to UartSci_Duplexity_FULL, and rebuild the driver. Then I could use SCIB as RX as well? Thanks and Best Regards Dong /** * @brief This is the XWR18xx MSS specific UART configuration. There are * 2 UART instances available on the MSS. UART1 is tied to SCI-A and UART3 is * tied to SCI-B. This should *NOT* be modified by the customer. */ UartSci_HwCfg gUartSciHwCfg[2] = { /* UART1 Hardware configuration: * - Capable of sending and receiving data * - PIN MUX is required */ { ((volatile SCIRegs*)SOC_XWR18XX_MSS_SCI_A_BASE_ADDRESS), UartSci_Duplexity_FULL, UartSci_PinMux_REQUIRED, SOC_XWR18XX_MSS_SCIA_LVL0_INT, SOC_XWR18XX_MSS_SCIA_TX_DMA_REQ, SOC_XWR18XX_MSS_SCIA_RX_DMA_REQ, &UartSci_openDMA, &UartSci_closeDMA, &UartSci_isDMAEnabled, &UartSci_initiateRxDMA, &UartSci_initiateTxDMA }, /* UART3 Hardware configuration: * - Capable of only sending data * - PIN MUX is required */ { ((volatile SCIRegs*)SOC_XWR18XX_MSS_SCI_B_BASE_ADDRESS), UartSci_Duplexity_TX_ONLY, UartSci_PinMux_REQUIRED, SOC_XWR18XX_MSS_SCIB_LVL0_INT, SOC_XWR18XX_MSS_SCIB_TX_DMA_REQ, SOC_XWR18XX_MSS_SCIB_RX_DMA_REQ, &UartSci_openDMA, &UartSci_closeDMA, &UartSci_isDMAEnabled, &UartSci_initiateRxDMA, &UartSci_initiateTxDMA } };", + "partNumber" : " IWR1843", + "allResponseList" : [ { + "contentId" : "3317502", + "userName" : "Charles Oladimeji", + "rankPoints" : "26350", + "rankName" : "Mastermind", + "date" : "Apr 16, 2020 2:48 AM", + "userId" : "4461477", + "content" : "Hi, I need to look into this, however can you provide some more details about your use case? how do you intend to send Data if you are re-purposing the data UART? BR, Charles O" + }, { + "contentId" : "3317647", + "userName" : "HanDong", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 16, 2020 6:21 AM", + "userId" : "6093939", + "content" : "Thanks for the response. Charles. In my current system structure, I plan to use SCIA as a debugger inferface during code development, but use SCIB as communication interface between IWR1843 with application board. Application board will issue \"customerized command\" to IWR1843, it will reply back with the measurement result. IWR1843 does not need to send back all the measurement data per frame as the demo does. But only reponse based on the \"query command\". Best Regards Dong" + }, { + "contentId" : "3327537", + "userName" : "Charles Oladimeji", + "rankPoints" : "26350", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 8:50 PM", + "userId" : "4461477", + "content" : "Hi, Table 4.4 page 22 of the datasheet shows both TX and RX for UART A and B, so you should be able to configure the pinmux to use multiple UART. You will have update the driver to support full duplex on SCIB. BR, Charles O" + }, { + "contentId" : "3328001", + "userName" : "HanDong", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 26, 2020 7:21 AM", + "userId" : "6093939", + "content" : "Thanks. Charles. Got it." + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR1843", "/support/sensors/f/1023/tags/IWR1843%2bSCI%2bB" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897042.json b/data/json/DLP/897042.json new file mode 100644 index 0000000000000000000000000000000000000000..8868d4045a88755a41cb72e7d8ecb816309aba57 --- /dev/null +++ b/data/json/DLP/897042.json @@ -0,0 +1,87 @@ +{ + "ticketNumber" : "897042", + "reporterName" : "Gorka Lorea", + "rankPoints" : "1395", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ34Z100-G1: AUTOCALIBRATION", + "rankName" : "Expert", + "replies" : " 9", + "views" : " 46", + "queryText" : "Part Number: BQ34Z100-G1 Hi, I am using a BQ34z100-g1 with an 8s2p LiFePO4 batteries. The nominal capacity of the battery is 3200mAh. My question is about the autocalibration of the bq34z100-g1. Here is what the datasheet says about it The gas gauge performs a single offset calibration when: OPTION 1 1. The interface lines stay low for a minimum of Bus Low Time and 2. VSR > Deadband. OPTION 2 1. The condition of AverageCurrent() ≤ Autocal Min Current and 2. {Voltage change since last offset calibration ≥ Delta Voltage} or {temperature change since last offset calibration is greater than Delta Temperature for ≥ Autocal Time}. My question is about the following parameters: - Bus Low Time - Autocal Min Current - Delta Voltage - Autocal Time Where are these parameters specified in the datahseet? what are its default values? Thank you very much, Best regards,", + "partNumber" : " BQ34Z100-G1", + "allResponseList" : [ { + "contentId" : "3317012", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 15, 2020 4:59 PM", + "userId" : "1864278", + "content" : "Hi Gorka, As far as I can tell, all the parameters should be private and that's why you cannot see them in the datasheet or TRM. Bus Low Time should 5 seconds. I need to check internally and see if can find the default values of other parameters. Andy" + }, { + "contentId" : "3317283", + "userName" : "Gorka Lorea", + "rankPoints" : "1395", + "rankName" : "Expert", + "date" : "Apr 15, 2020 9:20 PM", + "userId" : "1238066", + "content" : "Hi Andy, Ok, check that please. I am very interested in knowing when autocalibration occurs. I have small fixes in current (current droping form 25mA to 20mA) around 1 minute after powering the device and I want to know if it is due to autocalibration. Can you confirm me this point? Best regards," + }, { + "contentId" : "3319239", + "userName" : "Gorka Lorea", + "rankPoints" : "1395", + "rankName" : "Expert", + "date" : "Apr 17, 2020 10:03 AM", + "userId" : "1238066", + "content" : "Nobody??" + }, { + "contentId" : "3320027", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 17, 2020 9:45 PM", + "userId" : "1864278", + "content" : "Hi Gorka, Can you provide a bqStudio log file so that we can check to see whether it is due to autocalibration? Andy" + }, { + "contentId" : "3322383", + "userName" : "Gorka Lorea", + "rankPoints" : "1395", + "rankName" : "Expert", + "date" : "Apr 21, 2020 6:30 AM", + "userId" : "1238066", + "content" : "Hi Andy, I can not do that log in this moment but I can confirm you that after this \"current adjustment\" the value of the CC offset value has changed. The rest of the calibration parameters (CC Gain, CC Delta and Board offset) remains unchanged. Is this due to an autocalibration process? I need to know that, it is very important to know the value of this parameters - Autocal Min Current - Delta Voltage - Autocal Time Can you please provide me these parameters values? Regards," + }, { + "contentId" : "3323528", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 10:29 PM", + "userId" : "1864278", + "content" : "The autocalibration will be performed when these conditions are met. 1. AverageCurrent() < 100 mA for 60 s 2. Voltage change since last offset calibration ≥ 256 mV for ≥60s OR Temperature change since last offset calibration is greater than 8°C for ≥ 60 s Andy" + }, { + "contentId" : "3323806", + "userName" : "Gorka Lorea", + "rankPoints" : "1395", + "rankName" : "Expert", + "date" : "Apr 22, 2020 5:44 AM", + "userId" : "1238066", + "content" : "Thanks Andy, I still have a doubt of how autocalibrations is performed. 1. First condition is clear. 2. Second condition is not so clear for me. What I can read in the TRM is \"voltage offset error across SRP and SRN from time-to-time as operating conditions change. It subtracts the resulting offset error from normal sense resistor voltage, VSR, for maximum measurement accuracy.\" What does the bq34z100-g1 exactly do? Takes measurements in SRP and SRN, ok, but what does it do with them? Imagine current is 20mA, with a sensor resistor of 10mOhms we have theoretically 0V (the measurement will not be exactly 0) in SRN and 0.2mV in SRP. How this autocalibration use these values? Regards," + }, { + "contentId" : "3326619", + "userName" : "Gorka Lorea", + "rankPoints" : "1395", + "rankName" : "Expert", + "date" : "Apr 24, 2020 4:51 AM", + "userId" : "1238066", + "content" : "Andy? anybody else?" + }, { + "contentId" : "3327622", + "userName" : "Eric Vos24", + "rankPoints" : "3585", + "rankName" : "Expert", + "date" : "Apr 24, 2020 10:10 PM", + "userId" : "3440231", + "content" : "Gorka, When the gauge does an AutoCalibration it internally shorts the SRN/SRP pins to measure any offset. since we are internally shorting the pins the ADC raw counts should return as 0. anything at that point would be calibrated out. If you see the CC offset value update a CC cal was performed. Thanks, Eric Vos" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ34Z100_2D00_G1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897068.json b/data/json/DLP/897068.json new file mode 100644 index 0000000000000000000000000000000000000000..3ac1eb3398a9352b41a6da3473ed7b2a9415aedd --- /dev/null +++ b/data/json/DLP/897068.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "897068", + "reporterName" : "2018", + "rankPoints" : "2330", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ21040: when I switched the input to 25V, I broke the BQ21040, When the input voltage is 30V, what is the test condition?", + "rankName" : "Expert", + "replies" : " 2", + "views" : " 32", + "queryText" : "Part Number: BQ21040 The parameters in the BQ21040 specification book indicate that the maximum input voltage can reach 30V, But when I switched the input to 25V, I broke the BQ21040, When the input voltage is 30V, what is the test condition?", + "partNumber" : " BQ21040", + "allResponseList" : [ { + "contentId" : "3317113", + "userName" : "Nick Brylski", + "rankPoints" : "340", + "rankName" : "Prodigy", + "date" : "Apr 15, 2020 6:22 PM", + "userId" : "5338371", + "content" : "Is it possible that a transient over 30 V occurred during the test? The input capacitor used also needs to be appropriately rated to handle 25V. Best," + }, { + "contentId" : "3323445", + "userName" : "Nick Brylski", + "rankPoints" : "340", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 8:47 PM", + "userId" : "5338371", + "content" : "Hi there, I haven’t heard back from you, I’m assuming you were able to resolve your issue. If not, just post a reply below or create a new thread if the thread has locked due to time-out. Regards," + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ21040" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897076.json b/data/json/DLP/897076.json new file mode 100644 index 0000000000000000000000000000000000000000..3e8184e02094edba8ea1d5629adc77824021e823 --- /dev/null +++ b/data/json/DLP/897076.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "897076", + "reporterName" : "Kaji@PAN", + "rankPoints" : "3240", + "resolutionStatus" : "Resolved", + "ticketName" : "UCC27211: About capacitor between HB pin and HS pin", + "rankName" : "Genius", + "replies" : " 6", + "views" : " 65", + "queryText" : "Part Number: UCC27211 Hi, I am considering a circuit that uses the UCC27211 device. I ask about the capacitance of the capacitor connected between the HB and HS pins. The data sheet states that for this capacitance, a capacitance of 0.022uF to 0.1uF should be used. However, since I want to drive the High Side Switch on for a longer time, I want to use the capacitance of 4.7uF. Is it okay to use 4.7uF? Best regards,", + "partNumber" : " UCC27211", + "allResponseList" : [ { + "contentId" : "3316800", + "userName" : "Richard Herring", + "rankPoints" : "9680", + "rankName" : "Genius", + "date" : "Apr 15, 2020 2:42 PM", + "userId" : "618157", + "content" : "Hello Kaji, It is OK to use larger HB-HS capacitance than is listed in the datasheet typical value range. There are however important considerations using large boot capacitance values. It takes a longer time to charge the boot capacitor initially when the converter starts the 1st cycles, when the HB capacitor is charged initially, the charge is supplied by the VDD capacitor so the VDD capacitor needs to be sized to minimize the voltage drop. We usually recommend VDD cap 10x the boot capacitance. In this application is the switching frequency always low, which requires the long HO on time? I would recommend calculating the required boot capacitance using the design procedure in the UCC27282 datasheet section 8.2.2. The datasheet can be found here: /lit/ds/symlink/ucc27282.pdf The process is based on VDD and the switching frequency, and takes into account the quiescent current of the HO driver. For the UCC27211 use an IHB of 0.1mA to calculate the boot capacitance. If a lower HB capacitance can be used, we recommend that to allow faster charging of the HB capacitance on start up. Confirm if this addresses your questions, or you can post additional questions on this thread. Regards," + }, { + "contentId" : "3317500", + "userName" : "Kaji@PAN", + "rankPoints" : "3240", + "rankName" : "Genius", + "date" : "Apr 16, 2020 2:47 AM", + "userId" : "4834730", + "content" : "Thank you for your reply. I would like to ask you an additional question. I understand that the device of UCC27211 can use 4.7uF. Is this understanding correct? It has been pointed out that the problem that the voltage drop of the VDD capacitor becomes large at startup, but the problem that the inrush current of the bootstrap diode becomes large at startup is not pointed out. The larger the capacitor, the larger the current flowing in the device's built-in bootstrap diode. How do you deal with diodes? Is there a margin in the current capacity of the diode? Best regards," + }, { + "contentId" : "3318617", + "userName" : "Richard Herring", + "rankPoints" : "9680", + "rankName" : "Genius", + "date" : "Apr 16, 2020 9:55 PM", + "userId" : "618157", + "content" : "Hello Kaji, The UCC27211 can have a larger boot capacitor than the typical suggested range. The boot diode is capable of high peak currents, and this high current should only happen on the initial cycle(s) when charging the boot capacitor from 0V. I do suggest you look at the boot capacitor value based on my previous post, to see if you need this large value capacitance. I assume your application will be running at low frequency (<40kHz), can you confirm your operating frequency? We would not suggest, or do you need a large boot capacitance with higher switching frequencies such as in power convertors. If you desire, I can provide the required capacitance if you can provide me the following: VDD voltage, MOSFET part number (# number of devices in parallel), switching frequency, and HO expected maximum duty cycle. Regards," + }, { + "contentId" : "3324135", + "userName" : "Kaji@PAN", + "rankPoints" : "3240", + "rankName" : "Genius", + "date" : "Apr 22, 2020 11:36 AM", + "userId" : "4834730", + "content" : "Could you please activate this thread for additional questions? I got the following answer from you. We would not suggest, or do you need a large boot capacitance with higher switching frequencies such as in power convertors. Please provide details on why you are not recommended for the above content. Is it because the large capacitance has a large ESR? In that case, can it be solved by connecting an additional small capacitance with low ESR in parallel? I have already shipped the product, so I would like to proceed with the current circuit constants. Boot capacitance 4.7uF, operating frequency 10kHz. Best regards," + }, { + "contentId" : "3325510", + "userName" : "Kaji@PAN", + "rankPoints" : "3240", + "rankName" : "Genius", + "date" : "Apr 23, 2020 10:56 AM", + "userId" : "4834730", + "content" : "Part Number: UCC27211 Hi, I previously got the following answer in this thread. “I don't recommend if you have a high switching frequency like a power converter and you need a large boot capacitance.” Please provide details on why the above content is not recommended. Isn't it recommended to use a large capacitance because the ESR becomes large? If so, can this be solved by adding an additional small capacitor with low ESR in parallel? I have already shipped the product, so I would like to proceed with the current circuit constants. Current constants: boot capacitance 4.7uF, operating frequency 10kHz. Best regards," + }, { + "contentId" : "3325709", + "userName" : "Richard Herring", + "rankPoints" : "9680", + "rankName" : "Genius", + "date" : "Apr 23, 2020 2:19 PM", + "userId" : "618157", + "content" : "Hello Kaji, With your application with switching frequency of 10kHz, the use of a larger boot capacitance will be OK. The concern I mention before, if you have higher switching frequency, as in a power converter, with a large boot capacitance it will take more time for the boot capacitor to charge on the initial cycles. Also with higher switching frequencies you should not need a larger boot capacitance since the HO on times will not be long duration. Confirm if this addresses your question, or you can post additional questions on this thread. Regards," + } ], + "tags" : [ "/support/power-management/f/196/tags/Ucc27211" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897077.json b/data/json/DLP/897077.json new file mode 100644 index 0000000000000000000000000000000000000000..4491f69900e1c4eede9fd19af6a4eff30448708f --- /dev/null +++ b/data/json/DLP/897077.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "897077", + "reporterName" : "pia darling", + "rankPoints" : "30", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC3895: UCC3895DW", + "rankName" : "Prodigy", + "replies" : " 6", + "views" : " 42", + "queryText" : "Part Number: UCC3895 Hi, We have just bought 1000 pcs of this IC. They were made in a Malaysia factory with seal date 05.24.18. MSL 2 is the code, we received these unsealed, when where they opened ? The production code for these is \"85Z04NV\". \"85\" is date code, May 2018. But what about the rest ? We have earlier tried to unrole a whole roll of ic's and seen that the production code changes inside the roll, not the first two digits indicating year and month but one of the following digits, therefore the question. We have previously purchased this IC in whole rolls, rolls made in Malaysia and rolls made in Taiwan. There is a huge difference in the appearance of the ICs. The ICs from Taiwan have a pin 1 dot in the molding and the printed text includes a Texax logo, the IC's from Malaysia has not. Why this difference ? Thanks. With best regards Carsten Bruun Technician Horsodan Elektronik A/S", + "partNumber" : " UCC3895", + "allResponseList" : [ { + "contentId" : "3316669", + "userName" : "Colin Gillmor", + "rankPoints" : "22565", + "rankName" : "Mastermind", + "date" : "Apr 15, 2020 1:11 PM", + "userId" : "1139376", + "content" : "Hi Casten I'll have to do some checking on this - please bear with me for a few days and I'll get back to you. Regards Colin" + }, { + "contentId" : "3317867", + "userName" : "Colin Gillmor", + "rankPoints" : "22565", + "rankName" : "Mastermind", + "date" : "Apr 16, 2020 10:33 AM", + "userId" : "1139376", + "content" : "Hi Carsten I had to pass on this question to another department - they had a question - as follows. Can you get the picture please ? 'PDC has replied they used MSL 2 zip lock bags. Can you please ask customer to provide us the picture?' Thanks Colin" + }, { + "contentId" : "3321000", + "userName" : "pia darling", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 9:56 AM", + "userId" : "52203", + "content" : "Hi Colin, Attached is a picture of the two versions. With best regards Carsten./cfs-file/__key/communityserver-discussions-components-files/196/UCC3895DWTaiwan_2D00_Malaysia.pdf" + }, { + "contentId" : "3321055", + "userName" : "Colin Gillmor", + "rankPoints" : "22565", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 11:05 AM", + "userId" : "1139376", + "content" : "Hi Carsten Unfortunately, I got an error when I tried to follow the link. Probably the best thing to do is for you to email the images to me directly at colingillmor@ Regards Colin" + }, { + "contentId" : "3324290", + "userName" : "Colin Gillmor", + "rankPoints" : "22565", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 1:24 PM", + "userId" : "1139376", + "content" : "Hi Carsten Thanks for emailing me the pictures - I've passed them on. My contact here asked for a picture of the zip lok bags rather than the ICs themselves - is there any chance that you could take a picture of the bags please. given the previous experience, can you email the images to me directly at colingillmor@ Thanks" + }, { + "contentId" : "3325375", + "userName" : "Colin Gillmor", + "rankPoints" : "22565", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 7:51 AM", + "userId" : "1139376", + "content" : "Hi Carsten We have decided to continue this topic via email and I'm closing this thread. Thanks for the picture of the Zip-Lok (MSL2) bag that you sent to me. I've replied via email back to you and to our Customer Quality Engineer. Regards Colin" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC3895" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897100.json b/data/json/DLP/897100.json new file mode 100644 index 0000000000000000000000000000000000000000..f0f6fd5abc6fe7cb863bd0bdfc8e6b9c6c135bc4 --- /dev/null +++ b/data/json/DLP/897100.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "897100", + "reporterName" : "SHREYAS S BAGI", + "rankPoints" : "400", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "PCB Layout Guidelines for Merging High Voltage and DC Signal in single Board.", + "rankName" : "Intellectual", + "replies" : " 4", + "views" : " 33", + "queryText" : "Hi, In our Project, we are using Input Voltage 230V line having Common mode choke, differential noise removal and filter. We are generating Voltage 24V @ 2A. From 24V ---> 5V ---->3.3V ------> 1.5V -----> 1.1V. The voltage rails 5V, 1.5V,3.3V and 1.1V are going for Digital IC and Digital section. Questions : 1. PCB Layout guidelines for combining the High voltage AC and DC in a single board? Please provide resources ( layout files, schematics) for merging the boards. 2. What are the challenges and how to overcome challenges involved in \" PCB Layout guidelines for combining the High voltage AC and DC in a single board\"?Combination of the High Voltage and Digital Board 3. How to isolate the High Voltage and Low voltage rails in Board? The High voltage AC should add noise and disturb the Digital lines 4. How to choose the Stack up of PCB for the Merging High Voltage and DC Signal board?", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3317240", + "userName" : "Eric Faraci", + "rankPoints" : "7685", + "rankName" : "Expert", + "date" : "Apr 15, 2020 8:26 PM", + "userId" : "3729643", + "content" : "Shreyas For the AC/DC power conversion a design like PMP9041. This design uses our offline flyback controller UCC28710 to step the high voltage AC down to a low voltage DC while providing galvanic isolation. Please refer to this reference design for PCB layout example. It's recommended to keep physical separation between high voltage and low voltage circuits across the isolation boundary to prevent interference. Below are some additional collateral we recommend reviewing to learn fundamentals of AC/DC power conversion Video on flyback basics /understanding-basics-flyback-converter PCB layout techniques - recommendations on how to minimize noise coupling to digital lines Part 1: /pcb-layout-smps-part-1-2?context=1134585-1139234-1136886 Part 2: /pcb-layout-smps-part-2-2?context=1134585-1139234-1136887 PSDS papers on flyback converters /seclit/ml/slup261/slup261.pdf /seclit/ml/slup302/slup302.pdf Best Regards, Eric" + }, { + "contentId" : "3326647", + "userName" : "SHREYAS S BAGI", + "rankPoints" : "400", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 5:36 AM", + "userId" : "6142833", + "content" : "Hi Eric Faraci, Thanks I went through PCB layout techniques for SMPS and flyback converters papers that you mentioned. I need information on PCB Stackup considerations for Merging the Digital circuit (Digital signal of IC like MCU and other IC's) and High Voltage (440V). I want info on how to merge the boards not information on individual topics like PCB layout of SMPS or Digital circuit. Please answer on Merging the High Voltage (440V) and digital circuit on a Single PCB ." + }, { + "contentId" : "3327401", + "userName" : "Eric Faraci", + "rankPoints" : "7685", + "rankName" : "Expert", + "date" : "Apr 24, 2020 5:58 PM", + "userId" : "3729643", + "content" : "Shreyas We recommend that you use an isolated switched mode power supply, like a flyback with UCC28742, to convert 440V to low voltage DC. This flyback power stage will provide galvanic isolation. On the low voltage DC side, the voltage will be low enough to power your digital circuit and not corrupt signal quality. To insure that there is no coupling of high voltage signals to the low voltage side it's recommended that the PCB layout is designed in such a way where there is a physical line between HV and LV sides. Only components that cross the isolation boundary, such as the transformer, y-capacitor and optocoupler cross this boundary. Best Regards, Eric" + }, { + "contentId" : "3328551", + "userName" : "SHREYAS S BAGI", + "rankPoints" : "400", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 9:38 AM", + "userId" : "6142833", + "content" : "Hi Eric, In our project, we are using an isolated Flyback converter only. 1. Can you please elaborate and explain the statement \" To ensure that there is no coupling of high voltage signals to the low voltage side it's recommended that the PCB layout is designed in such a way where there is a physical line between HV and LV sides. \" ?. 2. Please give some reference designs and reference PCB layout to understand the above statement (Point 1)? 3. Do you think the stack-up of the PCB for high voltage and low voltage (Digital IC's like MCU, Processor) is the same ? Like, when we are talking about Multilayer board in terms of Layers, like FR4 material and Core in PCB is it same for even High Voltage also? 4. Please tell me what is stack-up (PCB) to be considered ( in terms of layer guidelines) for merging High voltage and low voltage circuit section?" + } ], + "tags" : [ ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897117.json b/data/json/DLP/897117.json new file mode 100644 index 0000000000000000000000000000000000000000..44451abffa758206ba6cd7430d8eb3dee5a123e1 --- /dev/null +++ b/data/json/DLP/897117.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "897117", + "reporterName" : "user5392072", + "rankPoints" : "330", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "IWR6843ISK: How can I reduce the baud rate of the data output serial port?", + "rankName" : "Intellectual", + "replies" : " 11", + "views" : " 73", + "queryText" : "Part Number: IWR6843ISK Hi there, Right now, I'm using the MCU to communicate with the IWR6843ISK EVM to configure and retrieve data.After referring to the evm guide, I put the IWR6843ISK evm in the \"Position for 40 pin LP/BP\" mode. I sent the pin configuration instruction to the J5 of IWR6843ISK evm board through the MCU serial port 1. After the configuration, the data should be output from the MSS LOGGER(pin 9) of J6. According to the IWR6843ISK EVM program, the baud rate of the data output serial port is 921600. But my MCU can only receive 115200 baud at most. How can I reduce the baud rate of the data output serial port? I hope I can get help, thank you very much, looking forward to your reply. Thanks!", + "partNumber" : " IWR6843ISK", + "allResponseList" : [ { + "contentId" : "3317492", + "userName" : "Charles Oladimeji", + "rankPoints" : "26350", + "rankName" : "Mastermind", + "date" : "Apr 16, 2020 2:41 AM", + "userId" : "4461477", + "content" : "Hi, Please source code for the demo you are running, you should be able to change the baud rate in Main.C /support/sensors/f/1023/t/866693 BR, Charles O" + }, { + "contentId" : "3322470", + "userName" : "user5392072", + "rankPoints" : "330", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 7:43 AM", + "userId" : "5392072", + "content" : "Hi,Charles O . I used the ES2.0 version of IWR6843ISK EVM and the C:\\ti\\mmwave_industrial_toolbox_4_1_0__win\\mmwave_industrial_toolbox_4_1_0\\labs\\people_counting\\68xx_people_counting\\prebuilt_binaries\\pplcount_lab_xwr68xx.bin file was flash memory. Download the firmware according to the Developer's Guide of the pplcount_user_guide.pdf document, use the Code Composer Studio version 8.1.0, want to change the baud rate in main.c. However, the following error occurred at the beginning of the import. I hope to get your help. Thank you very much. Thanks!" + }, { + "contentId" : "3324838", + "userName" : "Charles Oladimeji", + "rankPoints" : "26350", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 7:35 PM", + "userId" : "4461477", + "content" : "Hi, Did you try updating CCS as it says in the error? Also for debug you need to flash the debug bin, not the prebuilt bin. Please follow the right process as noted in the TIREX page you referenced. BR, Charles O" + }, { + "contentId" : "3325514", + "userName" : "user5392072", + "rankPoints" : "330", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 11:08 AM", + "userId" : "5392072", + "content" : "Hi, Charles O. Yes, the problem of not being able to import the project after the CSS update has been resolved. For the baud rate you described for modifying the data serial port in the main file, I imported and rebuilt the CSS and MSS projects as described in the user guide. Then I changed the baud rate of the data serial port in the mss_main.c file in the 68xx_pplcount_mss project from 921600 to 115200, and rebuilt to generate the new pplcount_lab_xwr68xx.bin file. 1. Is it as long as I rebuild it? Bin file flash into iwr6843isk evm, iwr6843isk evm can achieve data serial port to 115200 output? 3. During the flash drive of the pplcount_lab_xwr68xx.bin file to the iwr6843isk evm board, my UniFlash 6.0.0 remained stuck on the \"connected to com port\" while executing the flash command (that is, after pressing the button).How can I solve this problem? (I've also had good success with UniFlash recently.) I hope to get your help. Thank you very much. Thanks!" + }, { + "contentId" : "3326390", + "userName" : "Charles Oladimeji", + "rankPoints" : "26350", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 11:33 PM", + "userId" : "4461477", + "content" : "Hi, Do you have other programs running that could be using the COM Port? Also see related link below about UART Function BR, Charles O" + }, { + "contentId" : "3326828", + "userName" : "user5392072", + "rankPoints" : "330", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 8:51 AM", + "userId" : "5392072", + "content" : "Hi,Charles O. I tried to restart the computer, but the error still occurred while making sure no program was using the serial port. I've also tried to write on other PCS or laptops, and this has happened. Therefore, I am very distressed. I hope I can get your help to find the problem as soon as possible. I am looking forward to your reply. Thank you for your help!" + }, { + "contentId" : "3328353", + "userName" : "user5392072", + "rankPoints" : "330", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 6:23 AM", + "userId" : "5392072", + "content" : "Hi,Charles O. According to your description, I tried to restart the PC computer (under the condition that no com port was occupied), and re-used uniflash for flash storage. The flash process was still stuck in \"Connected to com port\", and the flash could not be successfully applied.Using a laptop to do the same thing also doesn't work with flash memory. I really look forward to your help, I will be very grateful! I am looking forward to your reply. Thank you for your help!" + }, { + "contentId" : "3328549", + "userName" : "user5392072", + "rankPoints" : "330", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 9:33 AM", + "userId" : "5392072", + "content" : "Hi,Charles O. First, I rebooted the laptop (win7_64-bit) and connected the usb to the computer port. I charged the IWR6843ISK EVM device and pressed the NRST button to reset it. Then, after ensuring that the device manager has recognized the xds110 uart port and xds110 data port, open the Uniflash 6.0.0 flash pplcount_lab_xwr68xx.bin file, the flash will still be stuck in the \"Connected to com port\" in the flash process, and the flash cannot succeed. But, will pop up a \"FlashPythonSubprocess. Exe has stopped working\" prompt dialog box. I'm not sure if this is the reason I can't flash. I really look forward to your help, I will be very grateful! I am looking forward to your reply. Thank you for your help!" + }, { + "contentId" : "3328559", + "userName" : "user5392072", + "rankPoints" : "330", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 9:49 AM", + "userId" : "5392072", + "content" : "Hi,Charles O. First, I rebooted the laptop (win7_64-bit) and connected the usb to the computer port. I charged the IWR6843ISK EVM device and pressed the NRST button to reset it. Then, after ensuring that the device manager has recognized the xds110 uart port and xds110 data port, open the Uniflash 6.0.0 flash pplcount_lab_xwr68xx.bin file, the flash will still be stuck in the \"Connected to com port\" in the flash process, and the flash cannot succeed. But, will pop up a \"FlashPythonSubprocess. Exe has stopped working\" prompt dialog box. I'm not sure if this is the reason I can't flash. I really look forward to your help, I will be very grateful! I am looking forward to your reply. Thank you for your help!" + }, { + "contentId" : "3329337", + "userName" : "Charles Oladimeji", + "rankPoints" : "26350", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 6:40 PM", + "userId" : "4461477", + "content" : "Hi, Can you try installing UNIFLASH on a different PC? it appears uniflash isn't working properly on your PC. BR, Charles O" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR6843ISK" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897136.json b/data/json/DLP/897136.json new file mode 100644 index 0000000000000000000000000000000000000000..b73dd4fff91bcb3f27692599109c03892b5fc1ca --- /dev/null +++ b/data/json/DLP/897136.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "897136", + "reporterName" : "SHREYAS S BAGI", + "rankPoints" : "400", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "How to combine High and Low Voltage in a Single Design", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 21", + "queryText" : "Hi, In our Project, we are using Input Voltage 230V line having Common mode choke, differential noise removal and filter. We are generating Voltage 24V @ 2A. From 24V ---> 5V ---->3.3V ------> 1.5V -----> 1.1V. The voltage rails 5V, 1.5V,3.3V and 1.1V are going for Digital IC and Digital section. Questions : 1. PCB Layout guidelines for combining the High voltage AC and DC in a single board? Please provide resources ( layout files, schematics) for merging the boards. 2. What are the challenges and how to overcome challenges involved in \" PCB Layout guidelines for combining the High voltage AC and DC in a single board\"?Combination of the High Voltage and Digital Board 3. How to isolate the High Voltage and Low voltage rails in Board? The High voltage AC should add noise and disturb the Digital lines 4. How to choose the Stack up of PCB for the Merging High Voltage and DC Signal board?", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3317200", + "userName" : "Eric Faraci", + "rankPoints" : "7685", + "rankName" : "Expert", + "date" : "Apr 15, 2020 7:55 PM", + "userId" : "3729643", + "content" : "Sereyas I see that you have asked this question in two separate E2E posts. I will respond to this question in the other post here /support/power-management/f/196/t/897100 Best Regards, Eric" + }, { + "contentId" : "3326648", + "userName" : "SHREYAS S BAGI", + "rankPoints" : "400", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 5:38 AM", + "userId" : "6142833", + "content" : "Hi Eric Faraci, Thanks I went through PCB layout techniques for SMPS and flyback converters papers that you mentioned. I need information on PCB Stackup considerations for Merging the Digital circuit (Digital signal of IC like MCU and other IC's) and High Voltage (440V). I want info on how to merge the boards not information on individual topics like PCB layout of SMPS or Digital circuit. Please answer on Merging the High Voltage (440V) and digital circuit on a Single PCB ." + }, { + "contentId" : "3327395", + "userName" : "Eric Faraci", + "rankPoints" : "7685", + "rankName" : "Expert", + "date" : "Apr 24, 2020 5:53 PM", + "userId" : "3729643", + "content" : "Sereyas You have asked this question in two separate E2E posts. I will respond to this question in the other post here /support/power-management/f/196/t/897100 In the future we recommend that you post just one E2E thread per question. Best Regards, Eric" + } ], + "tags" : [ ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897169.json b/data/json/DLP/897169.json new file mode 100644 index 0000000000000000000000000000000000000000..fdeb049f99a96d3fb650e66eef0d97cc3c74b5a9 --- /dev/null +++ b/data/json/DLP/897169.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "897169", + "reporterName" : "Onur Satilmis", + "rankPoints" : "35", + "resolutionStatus" : "Resolved", + "ticketName" : "CSD19536KTT: Qoss Calculation and check from datasheet", + "rankName" : "Prodigy", + "replies" : " 5", + "views" : " 31", + "queryText" : "Part Number: CSD19536KTT Hi, I am trying to calculate Qoss value from datasheet for type number is Csd19536ktt Mosfet. Could you please inform me about below subject? Qoss is 335nC for 50V according to the datasheet. But when I tried to calculate that value from Figure-5, I find it about 250nc. Which value is correct? And how do I calculate Qoss? Regards Onur", + "partNumber" : " CSD19536KTT", + "allResponseList" : [ { + "contentId" : "3317204", + "userName" : "John Wallace1", + "rankPoints" : "9460", + "rankName" : "Genius", + "date" : "Apr 15, 2020 7:57 PM", + "userId" : "3502056", + "content" : "Hi Onur, Thanks for your interest incompany FETs. I'm looking into this one and have an email into a colleague. It should be relatively simple to calculate Qoss from the Coss curve in Figure 5 of the datasheet. I'm not certain why you're getting a discrepancy. I will update you as soon as I have more information." + }, { + "contentId" : "3319685", + "userName" : "John Wallace1", + "rankPoints" : "9460", + "rankName" : "Genius", + "date" : "Apr 17, 2020 3:53 PM", + "userId" : "3502056", + "content" : "Hi Onur, I checked with the engineer who made the Coss and Qoss measurements for the values in the datasheet. I do not want to share this on e2e as it is a public forum. I am going to send you a friend request and will share this information with you in a private message after you accept the request." + }, { + "contentId" : "3319698", + "userName" : "Onur Satilmis", + "rankPoints" : "35", + "rankName" : "Prodigy", + "date" : "Apr 17, 2020 4:02 PM", + "userId" : "5822040", + "content" : "Hi John, Thank you so much for your interest." + }, { + "contentId" : "3322838", + "userName" : "John Wallace1", + "rankPoints" : "9460", + "rankName" : "Genius", + "date" : "Apr 21, 2020 1:23 PM", + "userId" : "3502056", + "content" : "Hi Onur, Thanks again for your interest incompany FETs. Following up to see if we have resolved your issues." + }, { + "contentId" : "3322873", + "userName" : "Onur Satilmis", + "rankPoints" : "35", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 1:50 PM", + "userId" : "5822040", + "content" : "Thank you for your interest." + } ], + "tags" : [ "/support/power-management/f/196/tags/CSD19536KTT" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897205.json b/data/json/DLP/897205.json new file mode 100644 index 0000000000000000000000000000000000000000..eb36fa1b6f9e01a6301049c669fdc9e73c5aa852 --- /dev/null +++ b/data/json/DLP/897205.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "897205", + "reporterName" : "Yuan Tan63", + "rankPoints" : "850", + "resolutionStatus" : "", + "ticketName" : "TPS563201: is there any requirement for startup", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 17", + "queryText" : "Part Number: TPS563201 Hi, customer uses this part, and here is the sch as below. they connect DC supply with VOUT_12 while e-load with VOUT_5.7V. when e-load>500mA, start up DC supply, the output cannot match 5.7V. But when e-load<400mA, start up DC supply, it works well. even change e-load to 1A, the output is stable too. is there any reason for that? thank you! Yuan", + "partNumber" : " TPS563201", + "allResponseList" : [ { + "contentId" : "3317042", + "userName" : "Ryan Hu (BSR-MV)", + "rankPoints" : "2730", + "rankName" : "Intellectual", + "date" : "Apr 15, 2020 5:25 PM", + "userId" : "4779079", + "content" : "Hi Yuan, What's the mean of output cannot match 5.7V? Was the output voltage stable after the soft start? There's large capacitance at the output side, when startup with large loading current, it needs huge energy to charge the output cap to 5.7V. Since the TPS563201 has a fixed soft start time of 1ms, after the soft start time, if the real output voltage was still lower than the target, OCP would be triggered. Per your description, i suggest you try without the 470uF E-cap or use a lower value first to double confirm you were facing the above issue." + }, { + "contentId" : "3318895", + "userName" : "Yuan Tan63", + "rankPoints" : "850", + "rankName" : "Intellectual", + "date" : "Apr 17, 2020 3:36 AM", + "userId" : "5303431", + "content" : "Hi Ryan, Thanks for your reply. but after customer removing the cap, still the same. and here is the output waveforms for different loads(300mA, 600mA, 800mA) thanks. Yuan" + }, { + "contentId" : "3322385", + "userName" : "Ryan Hu (BSR-MV)", + "rankPoints" : "2730", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 6:31 AM", + "userId" : "4779079", + "content" : "Hi Yuan, I found there is a 100nF cap used for the C82, could you please remove it or instead by a ~100pF cap? 100nF is too large." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS563201" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897225.json b/data/json/DLP/897225.json new file mode 100644 index 0000000000000000000000000000000000000000..74f0356abfc25602df67419cc2dd08f3950077f0 --- /dev/null +++ b/data/json/DLP/897225.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "897225", + "reporterName" : "Julio AFA", + "rankPoints" : "2455", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ35100: Sense resistor value check?", + "rankName" : "Intellectual", + "replies" : " 4", + "views" : " 23", + "queryText" : "Part Number: BQ35100 The datasheet in the 8.2.2.5 Current Sense Resistor Selection says \"The BQ35100 device calculates current through measuring a voltage across a small resistor in series with the battery. The default value is 100 mΩ. To maximize current measurement accuracy, the ideal value is calculated as: RSENSE (mΩ) = V(SR)Max / Peak Load Current (mA) Where V(SR) MAX = 125 mV\" I am concerned that we may not have a sufficient voltage drop to make this chip work correctly as we have a buck/boost converter between the battery and the comms module that shapes the current we sample. We are transmitting for 80-100ms with ~190mA current sourced from the buck/boost and its Vout caps. The buck/boost will reduce this current value on its Vin input which is connected to the battery. What minimum voltage drop across the sense resistor would still work for the BQ35100 chip? Shall we use an op-amp to boost the Rsense volage or stay with 100 mΩ ?", + "partNumber" : " BQ35100", + "allResponseList" : [ { + "contentId" : "3316994", + "userName" : "Eric Vos24", + "rankPoints" : "3585", + "rankName" : "Expert", + "date" : "Apr 15, 2020 4:47 PM", + "userId" : "3440231", + "content" : "Julio, There is no magic number we need to see because as you say the senseR value can change and we can calibrate to it. What is the current that you expect to see across the senseR through the buck/boost? ideally we would like to size the senseR to exercise as much of the ADC's full range as we can. I would not add an op-amp to the RSense at this point. you should be able to size correctly to measure. Thanks, Eric Vos" + }, { + "contentId" : "3321835", + "userName" : "Julio AFA", + "rankPoints" : "2455", + "rankName" : "Intellectual", + "date" : "Apr 20, 2020 7:05 PM", + "userId" : "4387044", + "content" : "Thanks Eric, We see 80mA to 100mA peak current. See the image below. Is 0.1 ohm sensing resistor going to work then?" + }, { + "contentId" : "3321851", + "userName" : "Eric Vos24", + "rankPoints" : "3585", + "rankName" : "Expert", + "date" : "Apr 20, 2020 7:24 PM", + "userId" : "3440231", + "content" : "Julio, The amplitude should be fine. At 80-100mA the gauge will be able to measure that accurately. The issue with the image you provided is the duration. The load must be at least 32mSec long. It is also critical the battery voltage drops at least 50mV under load Thanks, Eric Vos" + }, { + "contentId" : "3323427", + "userName" : "Julio AFA", + "rankPoints" : "2455", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 8:33 PM", + "userId" : "4387044", + "content" : "Eric, Thanks for the feedback, it will use the following battery : https://www.ultralifecorporation.com/ECommerce/product/er34615m/batt-li-socl2dsshr The load will jump from 0.15mA to the pulse shown in the plot above. It appears will be ok with the 50mV drop. The load" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ35100" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897239.json b/data/json/DLP/897239.json new file mode 100644 index 0000000000000000000000000000000000000000..a2f65143ac88ba7bbc1fdeee219a84832345a34c --- /dev/null +++ b/data/json/DLP/897239.json @@ -0,0 +1,71 @@ +{ + "ticketNumber" : "897239", + "reporterName" : "Michiaki Tanii", + "rankPoints" : "1600", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM46002: OV detection function", + "rankName" : "Intellectual", + "replies" : " 7", + "views" : " 39", + "queryText" : "Part Number: LM46002 Hi team, Could you kindly advise for more detail of the OV detection function of LM46002 ? Our customer is looking for the devices with OVP function. Thank you and best regards, Michiaki", + "partNumber" : " LM46002", + "allResponseList" : [ { + "contentId" : "3316878", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 15, 2020 3:31 PM", + "userId" : "1881345", + "content" : "Hello This device has an OVP function that will shut off the switching when the power good upper threshold is reached. Thanks" + }, { + "contentId" : "3317935", + "userName" : "Michiaki Tanii", + "rankPoints" : "1600", + "rankName" : "Intellectual", + "date" : "Apr 16, 2020 12:03 PM", + "userId" : "6119109", + "content" : "Hi I couldn’t see there is shutdown mode at OV condition in the datasheet. Could you kindly advise where there is description. In my understanding, LM46002 has OV detection but only turn on PGOOD switch. Thank you and best regards, Michiaki." + }, { + "contentId" : "3318219", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 16, 2020 3:27 PM", + "userId" : "1881345", + "content" : "Hello The description of this feature is not in the data sheet. However, the functionality is in the regulator. Thanks" + }, { + "contentId" : "3318746", + "userName" : "Michiaki Tanii", + "rankPoints" : "1600", + "rankName" : "Intellectual", + "date" : "Apr 17, 2020 12:47 AM", + "userId" : "6119109", + "content" : "Hi Could you share the timing chart at OVP protection ? Thank you and best regards, Michiaki" + }, { + "contentId" : "3319675", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 17, 2020 3:49 PM", + "userId" : "1881345", + "content" : "Hello I am not sure that we have details about the timing of the OVP function. However, once the output voltage reaches Vpgood-high and after a delay of Tpgood-rise, the device should stop switching. The same should occur at the falling edge. If this function is critical for your application, then you will need to test it on the bench with an EVM. Thanks" + }, { + "contentId" : "3319716", + "userName" : "Michiaki Tanii", + "rankPoints" : "1600", + "rankName" : "Intellectual", + "date" : "Apr 17, 2020 4:15 PM", + "userId" : "6119109", + "content" : "Hi Could you look into the detail of the timing of the OVP function ? And our customer requested us to describe the OVP function in the datasheet. Our customer is concerned about the misleading because there is no description about LM46002 should be shutdown at overvoltage state in the datasheet. Your understanding would be highly appreciated. Thank you and best regards, Michiaki" + }, { + "contentId" : "3324467", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 3:04 PM", + "userId" : "1881345", + "content" : "Hello We are working on this through direct email. I will close this post Thanks" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM46002" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897242.json b/data/json/DLP/897242.json new file mode 100644 index 0000000000000000000000000000000000000000..10f41b12709c08f9ed44f06e07dcaac65369ce48 --- /dev/null +++ b/data/json/DLP/897242.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "897242", + "reporterName" : "Jared Becker", + "rankPoints" : "7875", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS254900-Q1: IMON pin float if not used", + "rankName" : "Expert", + "replies" : " 5", + "views" : " 27", + "queryText" : "Part Number: TPS254900-Q1 Hi Team, It is acceptable for the IMON pin to be left floating if not used? Thank you! Jared", + "partNumber" : " TPS254900-Q1", + "allResponseList" : [ { + "contentId" : "3317553", + "userName" : "Michael Tan", + "rankPoints" : "5790", + "rankName" : "Expert", + "date" : "Apr 16, 2020 3:50 AM", + "userId" : "4803889", + "content" : "Hey Becker, It suggest short this pin to ground if you don't use this pin." + }, { + "contentId" : "3318036", + "userName" : "Jared Becker", + "rankPoints" : "7875", + "rankName" : "Expert", + "date" : "Apr 16, 2020 1:35 PM", + "userId" : "4295103", + "content" : "Hi Michael, Thank you for the quick reply. Should an resistor be placed between the pin and ground or is it acceptable to short the pin directly to ground with no resistance? -Jared" + }, { + "contentId" : "3318913", + "userName" : "Michael Tan", + "rankPoints" : "5790", + "rankName" : "Expert", + "date" : "Apr 17, 2020 3:56 AM", + "userId" : "4803889", + "content" : "Hi Jared, You can short this pin directly to GND not need to add a resistor." + }, { + "contentId" : "3322927", + "userName" : "Jared Becker", + "rankPoints" : "7875", + "rankName" : "Expert", + "date" : "Apr 21, 2020 2:21 PM", + "userId" : "4295103", + "content" : "Hi Michael, Thank you for your help on this! One more question for you.. tying the IMON pin directly to ground will increase current consumption in the device slightly. Therefore, are there any negative consequences from leaving the IMON pin floating if not used? What are the side effects of leaving the pin open? Thank you, Jared" + }, { + "contentId" : "3322965", + "userName" : "Michael Tan", + "rankPoints" : "5790", + "rankName" : "Expert", + "date" : "Apr 21, 2020 2:44 PM", + "userId" : "4803889", + "content" : "Hi Jared, This pin is use for internal feedback voltage sensing. If you let this pin open, there will be noise sensitive. The pin current is very small less then 100uA. You should not consider the current consumption for this small current." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS254900_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897250.json b/data/json/DLP/897250.json new file mode 100644 index 0000000000000000000000000000000000000000..ee20f6070b1e00774101a11858a89a7bfa2f696d --- /dev/null +++ b/data/json/DLP/897250.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "897250", + "reporterName" : "George Denove", + "rankPoints" : "180", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "AWR1642BOOST: External Clock Implementation: Will a 10 MHz external clock frequency function properly as an external clock input to the AWR? Or is 40 MHz necessary?", + "rankName" : "Prodigy", + "replies" : " 5", + "views" : " 49", + "queryText" : "Part Number: AWR1642BOOST Hi, I am currently working with three AWR1642's in a network (multistatic mode). Right now, they are hardware synchronized together in the network. I have worked hard to software synchronize them, but with clock drift among the radars (inaccuracy in clocks during test), I have not been able to solve this (recommendations?). Recently, I found a possible solution through a fellow lab at MIT (called AirShare, documentation attached). In short, AirShare has two components: a clock emitter and a clock recipient. The emitter transmits two tones, f1 and f2, that are separated by the desired clock frequency. The AirShre implementation has a bandpass filter that creates a desired input clock frequency of 10 MHz. Will a 10 MHz external clock frequency function properly as an external clock input to the AWR? On the AWR1642 device documentation, it denotes the external clock should be connected to CLKP pin at 40 MHz. Documentation below. Any help would be greatly appreciated... thank you! George -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- AirShare Documentation: AirShare.pdfcompany AWR1642 Documentation on External Clock:company External Clock Documentation.pdf", + "partNumber" : " AWR1642BOOST", + "allResponseList" : [ { + "contentId" : "3317812", + "userName" : "Vivek Dham", + "rankPoints" : "30420", + "rankName" : "Mastermind", + "date" : "Apr 16, 2020 9:28 AM", + "userId" : "333578", + "content" : "Hello George, AWR device cannot work with 10Mhz clock, it needs a 40Mhz clock. You could use a TCXO clock source instead of the xtal , this would allow for very low ppm frequency error (< 5ppm) across temperature. This should solve the frequency error problem If you are looking at timing synchronization for the frames , there is a digital synchronization signal called Dig SYNCIN. If you configure the device in hardware triggered mode the frame will be aligned to the pulse edge on the SYNC IN signal. So if you use the same signal (delay matched) to trigger all the devices they would be timing synchronized. Regards, Vivek" + }, { + "contentId" : "3318393", + "userName" : "George Denove", + "rankPoints" : "180", + "rankName" : "Prodigy", + "date" : "Apr 16, 2020 6:11 PM", + "userId" : "6164448", + "content" : "Hi Vivek, Thank you so much for your response. It helped me with understanding that I need to have an input of 40MHz clock rather than 10 MHz. Can you confirm that the external clock, like the one described by AirShare, would be inputted at CLKP pin? Or somewhere else? I was slightly confused by your Dig SYNCIN comment. Thank you! George" + }, { + "contentId" : "3319431", + "userName" : "Vivek Dham", + "rankPoints" : "30420", + "rankName" : "Mastermind", + "date" : "Apr 17, 2020 1:29 PM", + "userId" : "333578", + "content" : "Hello George, From the document I am not clear on the amplitude of the clock signal finally received at the wireless node and what is the \"quality\" of the clock in terms of jitter/phase noise. We need minimum 700 mVpp swing of the clock at the CLK P pin of our device. The phase noise requirements are also mentioned. Regarding the Dig SYNCIN, this is a digital signal to which the radar frame of the AWR device can be synchronized to. That will ensure the two AWr devices trigger the frame on the same signal and hence the same time. Regards, Vivek" + }, { + "contentId" : "3319442", + "userName" : "George Denove", + "rankPoints" : "180", + "rankName" : "Prodigy", + "date" : "Apr 17, 2020 1:37 PM", + "userId" : "6164448", + "content" : "Hi Vivek, Thank you for your response. I am talking to one of the authors next week about the paper and I will ask the questions you prompted in your first paragraph. When you talk about the Dig SYNCIN, is this digital signal hardware based (like tethering the two AWR's together with wire to provide this signal or can it be provided through software/digitally)? I want to start moving the nodes around the environment so having them not tethered together with wire (which provides the Dig SYNCIN signal) will be really beneficial. Any clarification would be greatly appreciated! George" + }, { + "contentId" : "3327011", + "userName" : "Vivek Dham", + "rankPoints" : "30420", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 12:55 PM", + "userId" : "333578", + "content" : "Hello George, The dig SYNC IN signal is a physical hardware signal to be fed to a partical pin. So yes, its a wire connection provided to both the AWRs. If you do not want a hardware connection I am not sure if there would be any other way to synchronize them. If you can have a smaller MCU that could receive a wireless signal and provide this HW signal to the AWR device at a predictable time after it receives a command over wireless communication? Regards, Vivek" + } ], + "tags" : [ "/support/sensors/f/1023/tags/AWR1642", "/support/sensors/f/1023/tags/awr20_5F00_a_5F00_hwa20_5F00_others", "/support/sensors/f/1023/tags/Input%2bSignal", "/support/sensors/f/1023/tags/software%2bsynchronization", "/support/sensors/f/1023/tags/AWR1642BOOST", "/support/sensors/f/1023/tags/external%2bclock", "/support/sensors/f/1023/tags/AWR1642%2bcrystal" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897260.json b/data/json/DLP/897260.json new file mode 100644 index 0000000000000000000000000000000000000000..ad4ebb8a594025d0c8633827c6ec2b76cc817b9a --- /dev/null +++ b/data/json/DLP/897260.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "897260", + "reporterName" : "Steve Dunn40", + "rankPoints" : "80", + "resolutionStatus" : "Resolved", + "ticketName" : "LM340: NDE .vs. NDG PACKAGE STYLES", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 40", + "queryText" : "Part Number: LM340 Sir, I need to understand what is the difference between the package styles called NDE (LM340AT-5.0/NOPB) and NDG (LM340T-5.0/LF01). both appear to be thru hole? Does one stands vertical (NDE) and the other comes with pre-bent legs for thru-hole or SMT pads (NDG)? can I get a footprint for each? I am using the OrCAD PCB Editor ver 17.2 can I get a 3D model for each. thank you, Steve Dunn Nuvo-Group HW Engineer Yigal Alon 94. St, Alon Tower 1, Tel Aviv 6789155 T: +972.765321622 M: +972.53.779.1610 www.nuvocares.com steve.dunn@nuvocares.com", + "partNumber" : " LM340", + "allResponseList" : [ { + "contentId" : "3319903", + "userName" : "Jason Song", + "rankPoints" : "12645", + "rankName" : "Genius", + "date" : "Apr 17, 2020 7:09 PM", + "userId" : "1505435", + "content" : "Hi Steven, In the datasheet, please see NDE drawing on Page 31 and NDG drawing on Page 33. As the drawing shows, the NDG is not through holes and with pre-bent legs while the NDE is through-hole. We use Altium to manage package drawings, please allow 1-2 business days for me to investigate if I could export the drawings and the 3d models to Orcad as you requested. Regards, Jason Song" + }, { + "contentId" : "3327505", + "userName" : "Jason Song", + "rankPoints" : "12645", + "rankName" : "Genius", + "date" : "Apr 24, 2020 7:58 PM", + "userId" : "1505435", + "content" : "Hi Steven, Sorry for the late reply. Here is the link with all the available output options that the Altium allows to export. Will you help to review the list and let me know which one would you like? I am not sure if I could concert the 3D but I am willing to try. https://techdocs.altium.com/display/ADOH/Importing%2Band%2BExporting%2BDesign%2BFiles Regards, Jason Song" + }, { + "contentId" : "3327764", + "userName" : "Steve Dunn40", + "rankPoints" : "80", + "rankName" : "Prodigy", + "date" : "Apr 25, 2020 4:27 AM", + "userId" : "4625643", + "content" : "Ok ok" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM340", "/support/power-management/f/196/tags/NDE%2bNDG" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897290.json b/data/json/DLP/897290.json new file mode 100644 index 0000000000000000000000000000000000000000..369ce7a331df0159aa96f187ae273d4182ed6087 --- /dev/null +++ b/data/json/DLP/897290.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "897290", + "reporterName" : "Adwaya Sau", + "rankPoints" : "550", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ25505: BQ25505 with 1V 100 nA input", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 31", + "queryText" : "Part Number: BQ25505 With regard to my previous question about the BQ25505, will it still work if I have a 100nA input current at 1V?", + "partNumber" : " BQ25505", + "allResponseList" : [ { + "contentId" : "3317151", + "userName" : "Jeff F", + "rankPoints" : "88360", + "rankName" : "Guru", + "date" : "Apr 15, 2020 6:59 PM", + "userId" : "8433", + "content" : "Hi Adwaya, With a charged storage element >1.8V at BAT, yes. If VSTOR < 1.8V, in cold start mode, it is unlikely that the inefficient cold start boost converter will be able to raise VSTOR to 1.8V due to the IC's Iq being in the 100nA range. If it works, it would only work in bursts as the input capacitor charges up, converter operate, stops, repeat. Regards, Jeff" + }, { + "contentId" : "3327215", + "userName" : "Adwaya Sau", + "rankPoints" : "550", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 3:37 PM", + "userId" : "5870610", + "content" : "So if I have a power supply of 2.0V, 100nA, will it be able to charge a supercap (that is initially not charged), from empty to full?" + }, { + "contentId" : "3327349", + "userName" : "Jeff F", + "rankPoints" : "88360", + "rankName" : "Guru", + "date" : "Apr 24, 2020 5:10 PM", + "userId" : "8433", + "content" : "Adwaya, If VSTOR < VSTOR=CHGEN~=1.8V, the charger is in cold start. Cold start boost circuit is very inefficient boost converter. It is intended as a last resort. We do not have efficiency data for cold start operation. Based on your input power = 200nW, the cold start circuit will have difficultly functioning. The cold start circuit will likely operate in infrequent bursts as the input capacitor charges above 600mV. However, the super capacitor and chip dc leakage current, plus any resistive load at VSTOR will prevent the supercapacitor from charging above 1.8V. Your 2.0V could be applied directly to VSTOR via a PFET but the chip's Iq is >> 100nA. Regards, Jeff" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25505" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897291.json b/data/json/DLP/897291.json new file mode 100644 index 0000000000000000000000000000000000000000..0168a9e416c0a31cb8b83fb07ce0cbdd440fd153 --- /dev/null +++ b/data/json/DLP/897291.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "897291", + "reporterName" : "James Phillips2", + "rankPoints" : "65", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LMG5200: LMG5200 Reliability at Very Low Switching Frequencies:", + "rankName" : "Prodigy", + "replies" : " 11", + "views" : " 62", + "queryText" : "Part Number: LMG5200 Hello, I am seeing occasional failures of the LMG5200 in my application: I am using the LMG5200 in a low-frequency PWM application with pure resistive loads. My pulse widths can vary from 200uS to 100mS, with the pulse-widths changing at most a percent or two from cycle to cycle. The resistive load can vary from 10 to 30 Ohms, but are constant in a given application configuration. Delivered power is well within spec limits, maximum 6 Amps through either the low side or high side switch, Vin < 40 Volts. I originally sized the bootstrap cap to 100uF for the maximum 100mS pulse width, but found experimentally that 10uF works adequately. My real application is functional, but occasionally, one of the LMG5200 driver fails (permanent short of Vin & SW & PGND and either HI or LI pins): I setup a test to isolate the failures: 1 KHz input on HI pin, the LI pin grounded, 20 Ohm load from SW to PGND. Vin=30V: I was able to catch one of the failures on the o-scope, showing the failure happens on the rising edge of SW as the high-side switch is turning on: The failure happened about 30 minutes after starting the test. The failing part shows VIN & PGND & SW all shorted together. Here are my questions: 1) Is there a maximum value of the bootstrap cap that the internal circuitry can safely charge? Or is it just a simple voltage charge through a current limiting resistor, no maximum limits on the bootstrap cap? 2) Is there a maximum value of the bootstrap cap that the high-side OV clamp can safely and quickly discharge? Is it possible that if the bootstrap cap gets excessive charge on it, the high-side clamp can't discharge it fast enough and damages the high-side switch? 3) Is there any possible issue with driving pure resistive loads? Is it possible that the faster rise time of SW (as compared to that using inductive loads) could pull the low-side gate high through the miller capacitor, causing momentary shoot-through and failure? 4) What are the most common failure modes of the LMG2500? Is there an application note describing all failure modes and how to prevent them? 5) Does customer organization know of any customer successfully using the LMG5200 at very low frequencies and/or with purely resistive loads? Thanks for your help! -James", + "partNumber" : " LMG5200", + "allResponseList" : [ { + "contentId" : "3317379", + "userName" : "Yichi Zhang.", + "rankPoints" : "870", + "rankName" : "Intellectual", + "date" : "Apr 15, 2020 11:43 PM", + "userId" : "5338385", + "content" : "Hello James, Thanks for contacting us. Here are some comments: 1. The clamp will be un-affected by the large bootstrap capacitor because it works by stopping the charging of the cap, not by clamping the voltage. 2. I don't see problem with this circuit. Since you are not switching the low-side in this test, the circuit effectively has the load resistance in series with the bootstrap charging path. I don’t suspect damage to the bootstrap diode. 3. Because of the in-package bootstrap cap, it is very difficult to screw up the bootstrap inductance loop. The damage could be caused by the power loop. 4. Could you please zoom in to the switching node waveform to observe the overshoot? 5. While you are capturing the switching node waveform, can you capture the HB pin waveform as well? Thanks! Regards," + }, { + "contentId" : "3322064", + "userName" : "James Phillips2", + "rankPoints" : "65", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 11:08 PM", + "userId" : "6324480", + "content" : "Thank you Yichi, I increased the power loop capacitance from VIN to PGND, and the ringing/overshoot displayed in my previous post cleaned up nicely and went away. :-) I thought the problem was solved, but unfortunately this morning, another LMG5200 driver popped. I was running at low power levels (30V Input, 40 Ohm Load, 10 KHz @ 50% duty cycle). I am starting to suspect another possibility: The LMG5200 spec indicates that PGND and AGND are totally isolated inside the part and recommends keeping them isolated on the PCB, which I did. Yet when I measure the resistance between PGND and AGND on a new LMG5200 part fresh out of the vacuum packed bag, unconnected to anything other than the Ohmmeter, I measure 0 Ohms, a 100% short INSIDE THE PART. Question for you: How are PGND and AGND isolated inside the LMG5200? Does the isolation depend on power being applied? Thanks so much for your help." + }, { + "contentId" : "3323453", + "userName" : "Yichi Zhang.", + "rankPoints" : "870", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 8:55 PM", + "userId" : "5338385", + "content" : "Hello James, Where did you see from the datasheet that AGND and PGND is isolated? AGND and PGND should be electrically shorted together. AGND and PGND are there for separations so that the signals not be interfered by the power switching currents. Regards," + }, { + "contentId" : "3323516", + "userName" : "James Phillips2", + "rankPoints" : "65", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 10:16 PM", + "userId" : "6324480", + "content" : "Hi Yichi, Thanks for your help! The LMG5200 datasheet, on page 16, specifically says to NOT short AGND and PGND together on the PCB, implying that they are electrically isolated inside the LMG5200, and one must not short them on the PCB: But my measurements with an Ohm meter across AGND and PGND on a brand new LMG5200 shows that these two pins are shorted together INSIDE THE PART. If the are shorted together inside the part, what is preventing some of the power current from being shunted out through the AGND pin? Could you please confirm if AGND and PGND are electrically shorted inside the LMG5200 or not? Thanks so much for your help! -James" + }, { + "contentId" : "3323530", + "userName" : "Yichi Zhang.", + "rankPoints" : "870", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 10:36 PM", + "userId" : "5338385", + "content" : "Hello James, On the datasheet PGND pin description, the PGND and AGND are electrically shorted. The layout guide is saying that for the signals, the grounds for them should be connected to AGND instead of PGND because there will be a lot of noise from the high frequency switching. AGND and PGND should be separated for power/signals. Please let me know if this makes sense. Regards," + }, { + "contentId" : "3324679", + "userName" : "James Phillips2", + "rankPoints" : "65", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 5:03 PM", + "userId" : "6324480", + "content" : "Thanks Yichi, With AGND and PGND shorted, what is preventing some of the high amperage power current from shunting out through AGND? To illustrate my point, here is a test setup with the low-side switch ON and the high-side switch OFF. I connect a 20 Ohm load across the SW pin and a 40V supply to produce 2 Amps of current. With 4 ammeters connected to VCC, VIN, AGND and PGND, what determines the value of the current through AGND and PGND? If they are truly \"electrically shorted\", should we get 1/2 through one and 1/2 through the other? 1 Amp through AGND and 1 Amp through PGND? Would this damage the part? There is no specification for AGND max current that I know of." + }, { + "contentId" : "3324937", + "userName" : "Yichi Zhang.", + "rankPoints" : "870", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 10:05 PM", + "userId" : "5338385", + "content" : "Hi James, We DO NOT want AGND to take half of the current. Although the PGND and AGND are connected together internally, if the PGND and AGND are separated on the PCB and not connected together, the power loop will not go through AGND since there is no closed path for it. Ideally, the current should all go through PGND, and only control signals should go through AGND. Please let me know if this makes sense. Regards," + }, { + "contentId" : "3325823", + "userName" : "James Phillips2", + "rankPoints" : "65", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 3:18 PM", + "userId" : "6324480", + "content" : "Hi Yichi, Yes, that makes perfect sense, and I agree with you that all the power-loop current should exit PGND. But that is not what I am measuring in the lab: I have discovered a failure mode of the LMG5200 that is reproducible, and I now know an apparent solution (both presented below) What I am asking from you Yichi, is to provide me more detail about this \"electrical connection\" between AGND and PGND so I can make sure this failure mode is not possible in the final system design and setup. Below is the reproducible failure mode. I am measuring significant power-loop current shunting out through the AGND pin. The LMG5200 will last in this state for 30-60 minutes before failing. When the failure occurs, you can actually here a *POP*, the power supply voltage drops low and goes into a current-limit state. After removal of the LMG5200 from the PCB, VIN, SW and PGND pins are all shorted together internally. Notice above that both of my supplies have the floating negative terminals shorted to the common earth ground. Thus the supplies are no longer floating. The solution is to simply float both of the supplies, disconnecting each negative terminal from the common earth ground: With that simple setup change, 100% of the power-loop current exits correctly out through the PGND pin, as it should: Thus it seems that whatever this \"electrical connection\" is between AGND and PGND it requires a slight voltage bias of a few milliVolts to properly close off the path from the power loop to AGND. Without this slight voltage bias, the path opens up and power-loop current is shunted out through AGND, and eventually destroys the part. Any further information you can provide on the inner details of whatever it is between AGND and PGND that can cause the power loop path to open up to AGND is what I am looking for to close this ticket out and go into production with the LMG5200, confident that this failure mode will never happen on a customer site. Thank you so much Yichi! :-) -James" + }, { + "contentId" : "3326307", + "userName" : "Yichi Zhang.", + "rankPoints" : "870", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 10:06 PM", + "userId" : "5338385", + "content" : "Hi James, Let me check back with the team to see what information is available to provide. Thanks," + }, { + "contentId" : "3326850", + "userName" : "James Phillips2", + "rankPoints" : "65", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 9:23 AM", + "userId" : "6324480", + "content" : "Thanks so much for your help Yichi! I did find this post by one of your co-workers, Lixing Fu: /support/tools/sim-hw-system-design/f/234/t/760440?TIDA-00913-Questions-about-Connecting-AGND-to-PGND-of-LMG5200 He mentions a \"Kelvin\" connection between AGND and PGND. Is this a small current sense resistor? What is the nominal value? The details of this internal connection is critical to my application because I am measuring current through the PGND connection using a 15 mOhm sense resistor, and I have a total of 6 LMG5200's on my PCB all sharing the same PGND and AGND ground planes. I will make a schematic picture of my concerns today so you can visualize what I am talking about. Thanks again, -James" + } ], + "tags" : [ "/support/power-management/f/196/tags/LMG5200" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897319.json b/data/json/DLP/897319.json new file mode 100644 index 0000000000000000000000000000000000000000..7e88414aa752aa33dc431238f07683f308680001 --- /dev/null +++ b/data/json/DLP/897319.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "897319", + "reporterName" : "Carter Timm1", + "rankPoints" : "50", + "resolutionStatus" : "Resolved", + "ticketName" : "UCC29910A: Design Tool Questions", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 20", + "queryText" : "Part Number: UCC29910A Greetings, Short background on the application: I am creating a 90-528 VAC input, 24V 150W output PFC power supply. I'm looking at a buck-boost topology for this to regulate Vbulk at around 400V regardless of input. Because I cannot find a buck-boost PFC controller (please let me know if you have one available or know of one), I am utilizing the UCC29910 and an additional unchosen PFC boost controller with additional circuitry to control which one is active, etc. I'm looking at the UCC29910A Design Calculator (rev A) (SLUC265) and have a couple of questions. 1. For the 'minimum AC input' field, should this number be the minimum AC input voltage that could ever be present or the minimum AC input voltage where the controller should be running? There is a distinct difference in my design because from 90-282 VAC input I will want to boost to 400V and from 283-528 VAC input I want the UCC29910 active. The 282/283 crossover range is flexible if you have a better suggestion, it's just right at the 400V mark. 2. What does the 'boundary AC input voltage' field refer to? Thank you for your time, Carter", + "partNumber" : " UCC29910A", + "allResponseList" : [ { + "contentId" : "3323052", + "userName" : "Hong Huang", + "rankPoints" : "18085", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 3:27 PM", + "userId" : "616779", + "content" : "1. For the 'minimum AC input' field, should this number be the minimum AC input voltage that could ever be present or the minimum AC input voltage where the controller should be running? There is a distinct difference in my design because from 90-282 VAC input I will want to boost to 400V and from 283-528 VAC input I want the UCC29910 active. The 282/283 crossover range is flexible if you have a better suggestion, it's just right at the 400V mark. Minimum AC input is the minimum input when you want to UCC29910A to operate. If you want UCC29910A to start operate from 282Vac, that is min. 2. What does the 'boundary AC input voltage' field refer to? Your UCC29910A operation is between 282Vac and 528Vac, you can pick up some voltage in between to make design. In the design sheet, 160Vac is about in the middle of 90Vac to 264Vac." + } ], + "tags" : [ "/support/power-management/f/196/tags/boost", "/support/power-management/f/196/tags/PFC", "/support/power-management/f/196/tags/buck_2D00_boost", "/support/power-management/f/196/tags/UCC29910A", "/support/power-management/f/196/tags/buck" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897340.json b/data/json/DLP/897340.json new file mode 100644 index 0000000000000000000000000000000000000000..886e04a82953461f1d1a0a213c3999c68b5b132a --- /dev/null +++ b/data/json/DLP/897340.json @@ -0,0 +1,71 @@ +{ + "ticketNumber" : "897340", + "reporterName" : "Nikhil Ramesh", + "rankPoints" : "40", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ34Z100-G1: Learning Cycle not converging", + "rankName" : "Prodigy", + "replies" : " 7", + "views" : " 47", + "queryText" : "Part Number: BQ34Z100-G1 I've been trying to run the learning cycle on a Samsung li-ion cell and have not had any luck getting it to converge. I've included my log here for review. Please advise on what I should try next. I've gone through 4 charge discharge cycles and the learning mode is still stuck on 4 instead of changing to 2 and then 6. learning_cycle.log", + "partNumber" : " BQ34Z100-G1", + "allResponseList" : [ { + "contentId" : "3318462", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 16, 2020 7:09 PM", + "userId" : "1864278", + "content" : "Hi Nikhil, Please share your srec file before you did the learning cycle. Andy" + }, { + "contentId" : "3318541", + "userName" : "Nikhil Ramesh", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 16, 2020 8:30 PM", + "userId" : "6216747", + "content" : "Here is the .srec file. Is there anyway to skip the learning cycle? The Ra table should mostly be sufficient since I'm using an off-the-shelf cell with an existing chem ID. I'd like to just manually set the Qmax based on some separate cycling I've done on these cells. Also, won't the Qmax already update continuously while cycling during normal use? 5228.0100_0_16-bq34z100G1.srec.txt" + }, { + "contentId" : "3318693", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 16, 2020 11:22 PM", + "userId" : "1864278", + "content" : "I just look at the log file. All the voltage readings don't seem right to me. I would suggest you double check. Andy" + }, { + "contentId" : "3318720", + "userName" : "Nikhil Ramesh", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 16, 2020 11:56 PM", + "userId" : "6216747", + "content" : "Can you please be more specific? Which voltages should I be checking? This is for a 4s lithium ion pack" + }, { + "contentId" : "3323557", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 11:27 PM", + "userId" : "1864278", + "content" : "Check the Voltage column in the log you uploaded. All the voltage readings are below 2V. They don't seem right for a 4s pack. The chemistry id you are using is for a battery that operates from 4.2V to 2.5V. The voltage reading should be over 10V. Andy" + }, { + "contentId" : "3323620", + "userName" : "Nikhil Ramesh", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 1:14 AM", + "userId" : "6216747", + "content" : "Which values in the log file should I be looking at? I'm seeing values that are in line with the pack voltage. It starts at a 1568 mV and ends at 1180 mV. I don't see anything that shows lower than 2V on the log. I've also tried again, this time doing an IT_ENABLE command once discharge has occurred and the OCVTAKEN bit has turned high in order to set a DOD0 reference point. I got this from the steps listed here: /support/power-management/f/196/t/300700. My taper current is set at 100 mA, but I still do not see the FC bit turn high during charge. The latest log is attached here. 50elearningcycle33333.log I'm not sure what else I can try here. I've tried with multiple packs and various ICs and nothing seems to work." + }, { + "contentId" : "3325006", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 12:04 AM", + "userId" : "1864278", + "content" : "See my comments below. It starts at a 1568 mV and ends at 1180 mV. I don't see anything that shows lower than 2V on the log. [Andy] 1568mV = 1.568V and 1180mV = 1.18V. See both are below 2V." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ34Z100_2D00_G1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897374.json b/data/json/DLP/897374.json new file mode 100644 index 0000000000000000000000000000000000000000..adc09a18758e716c490439bd48f78dd20a871513 --- /dev/null +++ b/data/json/DLP/897374.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "897374", + "reporterName" : "shuai dong", + "rankPoints" : "30", + "resolutionStatus" : "", + "ticketName" : "IWR1843BOOST: CCS support", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 40", + "queryText" : "Part Number: IWR1843BOOST I have bought the IWR1843demo board, The P/N is 3025010-03 And I install the CCS Version: 7.4.0.00015. But I can not find the IWR1843 in the Board or Device table. I am wandering that how can I get the IWR1843 from CCS or when you will support it?", + "partNumber" : " IWR1843BOOST", + "allResponseList" : [ { + "contentId" : "3318387", + "userName" : "Connor Desmond", + "rankPoints" : "410", + "rankName" : "Prodigy", + "date" : "Apr 16, 2020 6:04 PM", + "userId" : "6287558", + "content" : "Dear Shuai: Here is a link to get the OOB demo working for the IWR1843. If you notice in the instructions under the developer's guide it require's that you use CCS v8.3.1. I want you to get that version of CCS and go through the tutorial that I have linked and see if your device appears when you setup your target configuration. Let me know if this works. Link: http://dev./tirex/explore/node?node=AH1yn4Yr-VrqkN65pfhtXg__VLyFKFf__LATEST Best regards, Connor Desmond" + }, { + "contentId" : "3326719", + "userName" : "shuai dong", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 6:46 AM", + "userId" : "6280298", + "content" : "Thanks for your reply. I install the newest version of CCS and I can find the people counting demo code. But there is only demo code for 6843, no demo code for IWR1843 in people counting. How can I get the demo code or change the code for IWR6843 to IWR1843? And when will you release the offical code for IWR1843?" + }, { + "contentId" : "3327331", + "userName" : "Connor Desmond", + "rankPoints" : "410", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 4:55 PM", + "userId" : "6287558", + "content" : "Dear Shuai: The latest version of CCS is not 8.3.1. Try installing 8.3.1. Let me know if the device appears in the target configuration. Best regards, Connor Desmond" + }, { + "contentId" : "3327915", + "userName" : "shuai dong", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 26, 2020 12:37 AM", + "userId" : "6280298", + "content" : "Sorry, I didn't express very clearly. Now the CCS version is 10.0.0.00010, and I can find the board iwr1843 in it. But I cannot find the source code for people counting for IWR1843. So I am wondering when willcompany release it or how can I change the 68xx code to 1843." + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR1843", "/support/sensors/f/1023/tags/IWR1843BOOST" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897377.json b/data/json/DLP/897377.json new file mode 100644 index 0000000000000000000000000000000000000000..6051033a3ece44edf65330208bf072d6375b6855 --- /dev/null +++ b/data/json/DLP/897377.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "897377", + "reporterName" : "Zoe Ko", + "rankPoints" : "1880", + "resolutionStatus" : "Resolved", + "ticketName" : "TLV62095: schematic check", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 30", + "queryText" : "Part Number: TLV62095 Hi team, Could you please help review the schematic as attached? Thank you!", + "partNumber" : " TLV62095", + "allResponseList" : [ { + "contentId" : "3317805", + "userName" : "Dorian Brillet de Cande", + "rankPoints" : "5365", + "rankName" : "Expert", + "date" : "Apr 16, 2020 9:23 AM", + "userId" : "5350960", + "content" : "Hello Zoe, Schematic is looking good to me. Nothing to add from my side. Let me know if you have any other questions. Thanks a lot! Regards, Dorian" + }, { + "contentId" : "3324145", + "userName" : "Dorian Brillet de Cande", + "rankPoints" : "5365", + "rankName" : "Expert", + "date" : "Apr 22, 2020 11:42 AM", + "userId" : "5350960", + "content" : "Hello Zoe, I haven't heard back from you, I will close this thread due to inactivity. If you have any other questions on this topic or device, please reply below. Thanks a lot! Regards, Dorian" + }, { + "contentId" : "3325098", + "userName" : "Zoe Ko", + "rankPoints" : "1880", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 1:56 AM", + "userId" : "3829232", + "content" : "Hi Dorian, Many thanks!!!" + } ], + "tags" : [ "/support/power-management/f/196/tags/tlv62095" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897383.json b/data/json/DLP/897383.json new file mode 100644 index 0000000000000000000000000000000000000000..9888fa6335315c0be2d53211675f14d0067c1893 --- /dev/null +++ b/data/json/DLP/897383.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "897383", + "reporterName" : "Prajith Cheerakkoda", + "rankPoints" : "2180", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ4050: Fuel gauge that can work with BQ25700A/ BQ25710 w/o host controller.", + "rankName" : "Intellectual", + "replies" : " 4", + "views" : " 27", + "queryText" : "Part Number: BQ4050 Hi Team, I'm looking for a Fuel Gauge that can work (independently w/o host controller) over SMBus with battery charger BQ25700A/ BQ25710. My intention is to design a smart charger without Host controller. Thanks Prajith", + "partNumber" : " BQ4050", + "allResponseList" : [ { + "contentId" : "3318439", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 16, 2020 6:54 PM", + "userId" : "1864278", + "content" : "Hi Prajith, I assume you are working on a multi-cell application. BQ40z50 is a flash gauge and supports SMBus and it can work alone without a host controller. Andy" + }, { + "contentId" : "3319326", + "userName" : "Prajith Cheerakkoda", + "rankPoints" : "2180", + "rankName" : "Intellectual", + "date" : "Apr 17, 2020 11:37 AM", + "userId" : "6129930", + "content" : "Hi Andy, Thanks for your reply. I noticed that the part mentioned in your reply is BQ40z50, but my query was on BQ4050. Any specific reason? as per my understanding both of them are capable for SMBus master operation. Yes, battery configuration is 3s. May i know whether we have tested BQ40z50 with BQ25700A/ BQ25710? One more question, Is BQ4050 capable of multi-master operation? Thanks Prajith" + }, { + "contentId" : "3319808", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 17, 2020 5:28 PM", + "userId" : "1864278", + "content" : "Hi Prajith, Ses my comments below. a) BQ40z50 and BQ4050 are using different algorithms. If you are looking for accurate SoC readings, BQ40z50 is better. b) I have seen other customers use bq40z50 with bq25710 before. c) It should be. I would suggest you get an EVM and double check. Andy" + }, { + "contentId" : "3325243", + "userName" : "Prajith Cheerakkoda", + "rankPoints" : "2180", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 5:34 AM", + "userId" : "6129930", + "content" : "Hi Andy, Thanks for your reply. Regards Prajith" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25700A", "/support/power-management/f/196/tags/BQ25710", "/support/power-management/f/196/tags/BQ4050" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897384.json b/data/json/DLP/897384.json new file mode 100644 index 0000000000000000000000000000000000000000..83e1a96a0efcd949bbef82927830a562df1c346b --- /dev/null +++ b/data/json/DLP/897384.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "897384", + "reporterName" : "Red Yen", + "rankPoints" : "3200", + "resolutionStatus" : "", + "ticketName" : "LMR12010: LMR12010 CFF capacitor application questions", + "rankName" : "Expert", + "replies" : " 5", + "views" : " 22", + "queryText" : "Part Number: LMR12010 Hi Support team may i have your comments about the side effect of CFF capacitor (C606) on upper feedback resistor? my customer was encountered FB pin out of SPEC under low temp, but after shipped the suspect IC back to TI, it's passed ATE and bench, i assumed the issue was caused by CFF capacitor, may i have your deep explain on this cap?", + "partNumber" : " LMR12010", + "allResponseList" : [ { + "contentId" : "3318404", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Apr 16, 2020 6:20 PM", + "userId" : "24596", + "content" : "Red, Let me take a look." + }, { + "contentId" : "3318416", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Apr 16, 2020 6:30 PM", + "userId" : "24596", + "content" : "Red, I am not aware of any effect that a normal Cff cap would have on the FB voltage. That said, 0.068 uF is an unusually large feed forward value. It is possible that it may cause large ac ripple at VFB that may cause some DC offset. Can you provide the VFB voltage waveform with and without the capacitor?" + }, { + "contentId" : "3318502", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Apr 16, 2020 7:49 PM", + "userId" : "24596", + "content" : "Red, Pspice simulation does have a lot more ripple on VFB with Cff. VFB dc voltage is actually slightly lower. Please provide the requested waveforms." + }, { + "contentId" : "3321307", + "userName" : "Red Yen", + "rankPoints" : "3200", + "rankName" : "Expert", + "date" : "Apr 20, 2020 2:12 PM", + "userId" : "1409793", + "content" : "Hi John allow me to check w/ customer and get you back soon, thanks a lot" + }, { + "contentId" : "3323985", + "userName" : "Red Yen", + "rankPoints" : "3200", + "rankName" : "Expert", + "date" : "Apr 22, 2020 8:39 AM", + "userId" : "1409793", + "content" : "Hi John, pls refer to following about FB waveform, if CFF value is too huge, what is recommend value?" + } ], + "tags" : [ "/support/power-management/f/196/tags/LMR12010" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897434.json b/data/json/DLP/897434.json new file mode 100644 index 0000000000000000000000000000000000000000..429465e4bcbaee96b56e32f994ada55e7321fcf2 --- /dev/null +++ b/data/json/DLP/897434.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "897434", + "reporterName" : "Hector Ta", + "rankPoints" : "670", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "IWR6843: Pinmux settings & device coding for I2C/SPI usage", + "rankName" : "Intellectual", + "replies" : " 12", + "views" : " 133", + "queryText" : "Part Number: IWR6843 I'm using mmWave IWR6843. I saw incompany website has PixMux software but Windows OS does not allow me to install it, so I may need to use Cloud PinMux Tool. But I see no tutorial of Cloud PixMux Tool and the correlation between PinMux tool setting and device code. 1. Is it necessary to write some register codes or hardware modification related to pinMux in order to use SPI, I2C? I checked the document swru546b, but there's no information about it. As I know, if we do wrong on pinMux, the board will be broken. Please provide me with documents and share real application experience on it, I read IWR6843 datasheet and see some infor such as PINCNTL ADDRESS I2C_SCL is 0xFFFFEA74 I2C_SDA is 0xFFFFEA78 SPIA_CLK is 0xFFFFEA14, SPIA_CS_N, SPIB_CLK... Are SPIA & SPIB 2 SPI ports? Are these 2 SPI ports initially enabled ready for use or we have to do something to enable it? I checked SPI & I2C reference code in SDK, but I don't see any correlation between pinmux and SPI, I2C. Please explain in more details. Based on PINCNTL ADDRESS, please show me how to write code for SPI/I2C corresponding to PinMux settings. 2. By the way, can u introduce me any adapter device (SPI/I2C to USB converter) to connect IWR6843 to PC via SPI/I2C pins? I found some FTDI ICs FT2232C (for SPI), FT232H (for I2C). Is it better to connect IWR6843 to Rapsberry Pi 3 via SPI/I2C directly rather than using SPI/I2C-to-USB converter to general-purpose PC? If I connect IWR6843 to Rapsberry Pi 3 model B+ via SPI/I2C, the voltages are the same to connect without having to use any adapter, right? 3. If I use FTDI IC for SPI/I2C to USB converter, how can I send data from IWR6843 to PC through FTDI IC? Do I need to write my own code for FTDI IC or there's an API? If I don't care the IC brand, can you suggest me some SPI/I2C to USB converter which provides me with full source code to send data? 4. If I use Rapsberry Pi 3 to get data from IWR6843 via SPI/I2C, is there any difference betweencompany SDK in Windows OS and Linux? Can I use the samecompany source code on different OS? If not, please give me link to download SDK, and allcompany required tools on Linux in order to test with Rapsberry Pi 3.", + "partNumber" : " IWR6843", + "allResponseList" : [ { + "contentId" : "3318711", + "userName" : "Charles Oladimeji", + "rankPoints" : "26350", + "rankName" : "Mastermind", + "date" : "Apr 16, 2020 11:44 PM", + "userId" : "4461477", + "content" : "Hi, Please download and install MMWAVE SDK. In the path below in the SDK directory, there are examples you can review to understand how to setup the peripherals. mmwave_sdk_03_xx_xx_xx\\packages\\ti\\drivers the appnote linked below also has SPI implemented in the SW package /lit/ug/tidud26b/tidud26b.pdf. Charles O" + }, { + "contentId" : "3318785", + "userName" : "Hector Ta", + "rankPoints" : "670", + "rankName" : "Intellectual", + "date" : "Apr 17, 2020 1:47 AM", + "userId" : "6292133", + "content" : "Hi Charles, 1. Because UART data transfer rate is low, so I want to connect radar board to PC via SPI/I2C for higher speed. But if we still use MSP432 to connect to PC via UART port, PC still receive data as slow as UART rate, right? So it's not different from connecting IWR6843 directly to PC via UART. Since IWR6843 also has UART port, what's the point of using MSP432 as a bridge between IWR6843 & PC if it does not help increase data transfer rate than UART? 2. I see incompany SDK has spiTest.cpp, it mentions FTDI Spi interface. Do I need to write code separately for FTDI IC? Please tell me how to connect IWR6843 to PC by using FTDI SPI/I2C. 3. Besides, you haven't replied my question about the correlation between pinmux setting and SPI/I2C device code and the way of assigning register address for SPI/I2C pins in device code." + }, { + "contentId" : "3321626", + "userName" : "Charles Oladimeji", + "rankPoints" : "26350", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 4:43 PM", + "userId" : "4461477", + "content" : "Hector Ta 1. Because UART data transfer rate is low, so I want to connect radar board to PC via SPI/I2C for higher speed. But if we still use MSP432 to connect to PC via UART port, PC still receive data as slow as UART rate, right? So it's not different from connecting IWR6843 directly to PC via UART. Since IWR6843 also has UART port, what's the point of using MSP432 as a bridge between IWR6843 & PC if it does not help increase data transfer rate than UART? if the intention is to connect to the PC directly via SPI, you can use the other USB port on the MMWAVEICBOOST. Please see section 2.4.1 of the users guide. /lit/ug/swru546b/swru546b.pdf Please not that the OOB demo, mmWave visualizer and other applications we provide currently only support UART, Hector Ta 2. I see incompany SDK has spiTest.cpp, it mentions FTDI Spi interface. Do I need to write code separately for FTDI IC? Please tell me how to connect IWR6843 to PC by using FTDI SPI/I2C. When the FTDI is connected using the USB shown above, it appears on the device manager as a COM port. The FTDI on the MMWAVEICBOOST is programmed, you only need to install the driver in other to see the COM port Hector Ta 3. Besides, you haven't replied my question about the correlation between pinmux setting and SPI/I2C device code and the way of assigning register address for SPI/I2C pins in device code. Please reviews the examples in the SDK, it shows how to setup the pinmux and various peripherals." + }, { + "contentId" : "3322349", + "userName" : "Hector Ta", + "rankPoints" : "670", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 5:59 AM", + "userId" : "6292133", + "content" : "Hi Charles, I modified mss_main.c code, then added SPI lib to mss project path but the compile still got error. Please tell me a way to solve it." + }, { + "contentId" : "3322365", + "userName" : "Hector Ta", + "rankPoints" : "670", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 6:10 AM", + "userId" : "6292133", + "content" : "Hi Charles, I got less compiling error by adding xwr68xx_spi_mss.xer4f in the path C:\\ti\\mmwave_sdk_03_03_00_03\\packages\\ti\\drivers\\spi\\test\\xwr68xx to the project. Previously, I got 13 compile errors. After added xwr68xx_spi_mss.xer4f, now I only see 4 errors. Not sure whether this is better or not. But even if I don't use SPI function and remove all SPI commands, I still have these 4 errors after adding xwr68xx_spi_mss.xer4f to my project. If I don't add it, I only got compile error when I use SPI commands. How to solve it? I expect I can use SPI/I2C within this week, but I got stuck at library linking even though it seems to be easy. 1. Here's the error after I added xwr68xx_spi_mss.xer4f error: \"could not be statically or dynamically linked null: file \"C:/ti/mmwave_sdk_03_03_00_03/packages/ti/drivers/spi/test/xwr68xx/xwr68xx_spi_mss.xer4f\" could not be statically or dynamically linked 3D_people_count_68xx_mss C/C++ Problem 2. Here's the error without xwr68xx_spi_mss.xer4f, I only added libspi_xwr68xx.aer4f in the path C:\\ti\\mmwave_sdk_03_03_00_03\\packages\\ti\\drivers\\spi\\lib" + }, { + "contentId" : "3324860", + "userName" : "db_woodall", + "rankPoints" : "10875", + "rankName" : "Genius", + "date" : "Apr 22, 2020 8:00 PM", + "userId" : "20112", + "content" : "Are you trying to build the SPI test code, or are you trying to link the SPI driver into an existing CCS project? Nothing within the SDK builds within CCS by default - only gmake makefiles are used. The SDK user guide gives full instructions on how to build via gmake. So if you want to rebuild the SPI test code, use gmake. If you are trying to include the SPI driver into your CCS project, then I question why are you trying to include SPI test code? -dave" + }, { + "contentId" : "3325235", + "userName" : "Hector Ta", + "rankPoints" : "670", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 5:22 AM", + "userId" : "6292133", + "content" : "Hi woodall, My Manager wants me to prove that I can make SPI function works well on IWR6843 EVM. So I need to demo it on a PC, maybe via GUI or data stored in csv/excel. But GUI provided bycompany can only demo via UART, so I guess it's not suitable for my purpose. So I have these questions: 1. Is there any way to test SPI function of IWR6843 EVM and still connect its XDS110 port to PC USB port to show a demo of SPI read/write? 2. If it's mandatory to use a bridge circuit board? I read TIDEP-0091 that described connection between IWR1443 & MSP430 launchpad, but I don't have MSP430 now. Is there any document or sample code to communicate Raspberry Pi, Arduino with IWR6843? 3. In the future, I may purchase MSP432 launchpad, please share me the SPI communication code and UART GUI for the project demo similar to TIDEP-0091.pdf file." + }, { + "contentId" : "3325699", + "userName" : "db_woodall", + "rankPoints" : "10875", + "rankName" : "Genius", + "date" : "Apr 23, 2020 2:13 PM", + "userId" : "20112", + "content" : ">1. Is there any way to test SPI function of IWR6843 EVM and still connect its XDS110 port to PC USB port to show a demo of SPI read/write? Sure, you can simply flash the pre-built SPI example program. The program uses the USB UART to display information and to request sub-test numbers. What test(s) you can run depends on what you connect to the carrier card. Probably the easiest way to show the SPI is working is by using an SPI protocol tester. You can also edit/rebuild the example code to only perform the tests you are interested in, and in the SPI mode you are interested in. >2. If it's mandatory to use a bridge circuit board? I read TIDEP-0091 that described connection between IWR1443 & MSP430 launchpad, but I don't have MSP430 now. Is there any document or sample code to communicate Raspberry Pi, Arduino with IWR6843? No, but you do need something that understands SPI. I have used two 6843 EVMs, and connected the two carrier cards with breadboard jumper wires. TIDEP-0091 uses an MSP432. You can also use any other kind of board such as a Raspberry Pi or Beagle Bone, you just need to find out how to connect the wires and configure the device for an SPI mode that is compatible with the SPI mode used on the 6843 EVM. Here are the carrier card connections. You can refer to the board schematics to see which pins are which: >3. In the future, I may purchase MSP432 launchpad, please share me the SPI communication code and UART GUI for the project demo similar to TIDEP-0091.pdf file. This code is already available with the design guide material here: www./.../tidcde2" + }, { + "contentId" : "3325840", + "userName" : "Hector Ta", + "rankPoints" : "670", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 3:27 PM", + "userId" : "6292133", + "content" : "Hi woodall, 1. Can you give me the SPI code to read/write data between 2 IWR6843 EVM? I'm doing 3D people counting. It'd be great if you have SPI code for 2 IWR6843 EVMs or similar EVM for my application. If SPI data transfer is successful, we can still display tracking on GUI via UART of 1 EVM without having to design new GUI or write SPI code on MSP432/Pi. Anyways, I'm still concerned about the way to demo on GUI. e.g. We have EVM A & B. We write data from A to B via SPI. After B finished SPI reading, B send data to PC via UART. How can I know that B didn't send tracking data by itself? Because both boards are working. Maybe SPI write from A was failed but GUI still get data from B. Do I need to store SPI data read in a buffer then send it from B to GUI to know whether SPI works well? 2. The link you sent to me is not available to download. Please upload on Dropbox or Google Drive and send me another link. Of course, if you can send me code as #1 query, I don't need to use MSP432 anymore. But it's still good to have both solution." + }, { + "contentId" : "3326348", + "userName" : "db_woodall", + "rankPoints" : "10875", + "rankName" : "Genius", + "date" : "Apr 23, 2020 10:39 PM", + "userId" : "20112", + "content" : "Attached are two zip files. xwr6843_mmw_spi_demo_src.zip provides files to drop into the 68xx mmw demo MSS folder (MSS only). xwr68xx_spi_slave_testcode_src.zip contains files to drop into C:\\ti\\mmwave_sdk_03_0x_0x_0x\\packages\\ti\\drivers\\spi\\test\\xwr68xx. I strongly suggest making copies of the original files so that you can compare them to see the differences. You will need to rebuild both the demo, which sends demo output to SPI, and the test code, which receives the SPI transfers and displays counts of received messages. Follow the SDK user guide's instructions to build. xwr6843_mmw_spi_demo_src.zip xwr68xx_spi_slave_testcode_src.zip" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR6843", "/support/sensors/f/1023/tags/_2300_PinMux", "/support/sensors/f/1023/tags/_2300_I2C", "/support/sensors/f/1023/tags/_2300_SPI" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897436.json b/data/json/DLP/897436.json new file mode 100644 index 0000000000000000000000000000000000000000..52d4ac10a981a106dcd54f35532732c83bce4692 --- /dev/null +++ b/data/json/DLP/897436.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "897436", + "reporterName" : "Andreas Eder", + "rankPoints" : "30", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ25895: Voltage Drop Vsys, Maximum Ouput Current Vsys durring charging and standalone with battery only, Output Voltage 4.2V, 5V (DC/DC TPS61230DRCD PTN04050CAH )", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 40", + "queryText" : "Part Number: BQ25895 Hello, first of all thanks for the useful informations here in this forum. After reading different threads a decided to use the BQ25895 for a portable reader device with a lipo battery (should read with bat only or with vbus) and made a pcb with it. Now I have some question after testing the BQ25895 with the reader device because I have some voltage drops at the output of Vsys with fully charged lipo. Currently I design the version 2 of the pcb and here I use different dc/dc converters to handle the voltage drop and get the specified (max) voltages for the different devices: Reader: 3.2-5.25V, 8W (5V @ 1.6A) DC/DC @ Vsys: PTN04050CAH (5V, 2.4A) GSM: 3.4-4.4V, (2A in Burst Mode for a short time) DC/DC @ Vsys: TPS61230DRCD (4.2V, 2.1A) GPS: 3.3V, (100mA) LDO @ 5V 1.) The max. Isys current is 5A so with Vsys,min = 3.7V we should have enough power at Vsys? 2.) Durring charging the battery I also have the 5A @ Isys? 3.) Are there other power management chips (DC/DC, LDO, ...) which handle the different voltages better? It is the first time I used this chip and hopefully you can help me with your experience. Thanks Andi Settings: Ilim = 2900A, Vsys,min = 3,7V, Vreg = 4.208V", + "partNumber" : " BQ25895", + "allResponseList" : [ { + "contentId" : "3318946", + "userName" : "Ning T", + "rankPoints" : "15365", + "rankName" : "Genius", + "date" : "Apr 17, 2020 5:05 AM", + "userId" : "145100", + "content" : "Hi, Please visit /support/power-management/f/196/t/874557 for BQ2589X: Schematic Review and PCB Layout Design Tips and /support/power-management/f/196/t/875386 for BQ2589x/BQ25898x FAQs. 1) Please refer to FAQ #3. 2) BQ25895 is a 5-A charger. It can handle up to 5A total current, i.e. the sum of the charging current and the system current. If there's no battery, the maximum system current can be 5A. Please note that the max input current limit is 3.25A, the system current and/or may also be limited by the input power. 3) If a fix SYS voltage is preferred, it is better to use DC/DC. This is charger support. Please submit a separate thread about DC/DC and DC/DC expert will help. Thanks, Ning." + }, { + "contentId" : "3319359", + "userName" : "Andreas Eder", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 17, 2020 12:17 PM", + "userId" : "6316950", + "content" : "Thanks for your fast answer. So if the BQ25895 could handle up to 5A total, would it be possible to connect the devices (DC/DC) directly to the VBAT because I want always supply the devices and if there is any current \"left\" the battery should be charged? Would this go? I don't use the OTG functionality and so the pin PMID is floating or do I need the 40uF cap also?" + }, { + "contentId" : "3326601", + "userName" : "Ning T", + "rankPoints" : "15365", + "rankName" : "Genius", + "date" : "Apr 24, 2020 4:03 AM", + "userId" : "145100", + "content" : "Hi, 1. It is ok to lease SYS open (i.e. no SYS load) and charge the battery only. Then the max charge current will be 5A. 2. If OTG is not used, the minimum capacitance required on PMID to PGND is 8.2 μF. Thanks, Ning." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25895", "/support/power-management/f/196/tags/BQ25895%2bPTN04050CAH%2b%2bTPS61230DRCD" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897452.json b/data/json/DLP/897452.json new file mode 100644 index 0000000000000000000000000000000000000000..f77cc15fb113ae84cfd53aa39b4fc9887fe8021f --- /dev/null +++ b/data/json/DLP/897452.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "897452", + "reporterName" : "Jack Wang", + "rankPoints" : "220", + "resolutionStatus" : "Resolved", + "ticketName" : "UCD3138: Missing Factory Trim during download", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 43", + "queryText" : "Part Number: UCD3138 Hi Experts, - I encounter an err message (shown below) while downloading firmware. I've read the post. (Description of trim value invalid from Ian) - In the last part of the post, it says \"it(if) the part gets really mishandled, it can happen. \". Is there any idea of \"mishandled\" may refer to..? - Any ideas would help. Thanks.", + "partNumber" : " UCD3138", + "allResponseList" : [ { + "contentId" : "3318202", + "userName" : "Ian Bower", + "rankPoints" : "9985", + "rankName" : "Genius", + "date" : "Apr 16, 2020 3:20 PM", + "userId" : "178868", + "content" : "Normally the mishandling involves lots of repeated quick resets, and a noisy power supply. If the rise time on the power supply is slower than recommended on the Practical Design Guidelines, and the Reset pin isn't being held down it can happen. /lit/an/slua779b/slua779b.pdf" + }, { + "contentId" : "3318980", + "userName" : "Jack Wang", + "rankPoints" : "220", + "rankName" : "Prodigy", + "date" : "Apr 17, 2020 5:46 AM", + "userId" : "3642544", + "content" : "Hi Ian, - Thank you very much. I'll check the 3V3 slew rate and RESET pin with design guideline." + }, { + "contentId" : "3323082", + "userName" : "Ian Bower", + "rankPoints" : "9985", + "rankName" : "Genius", + "date" : "Apr 21, 2020 3:40 PM", + "userId" : "178868", + "content" : "Great, glad to help." + } ], + "tags" : [ "/support/power-management/f/196/tags/UCD3138" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897460.json b/data/json/DLP/897460.json new file mode 100644 index 0000000000000000000000000000000000000000..235479598d148879ef903ca51885c3782a7014e6 --- /dev/null +++ b/data/json/DLP/897460.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "897460", + "reporterName" : "MEIJIE SHEN", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ34Z100-G1: TrueRC and TrueFCC sudden jump in low temperature discharge ,then SOC drop quickly", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 26", + "queryText" : "Part Number: BQ34Z100-G1 Please see attched gg , log and srec files. TrueRC, TrueFCC all drop in value during discharge in low temperature.lowtemp test.rar TrueRC drops from 10024 to 3062. TrueFCC drops from 11154 to 4203,then SOC drop quickly. Why this phenomenon occurs?Pls help me.Thanks.", + "partNumber" : " BQ34Z100-G1", + "allResponseList" : [ { + "contentId" : "3318452", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 16, 2020 7:01 PM", + "userId" : "1864278", + "content" : "Hi Meijie, I would need to take a close look at the log file. Will let you know if I need other information from you. Andy" + }, { + "contentId" : "3318546", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 16, 2020 8:42 PM", + "userId" : "1864278", + "content" : "Hi Meijie, Hid you choose the chemistry id? Did you use the GPCCHEM tool to find the best matching id? Andy" + }, { + "contentId" : "3321154", + "userName" : "MEIJIE SHEN", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 12:39 PM", + "userId" : "4989446", + "content" : "Hi Andy, I use the best chemical ID and I have complete the RB experiment. I want to know which may the phenomenon occurs.Please give me some advices." + }, { + "contentId" : "3327630", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 24, 2020 10:16 PM", + "userId" : "3528441", + "content" : "Hello Miejie, It could be temperature change or dynamic loading conditions." + } ], + "tags" : [ "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2b%2bBQstudio%2b_2300_BQ34Z100_2D00_G1", "/support/power-management/f/196/tags/BQ34Z100_2D00_G1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897477.json b/data/json/DLP/897477.json new file mode 100644 index 0000000000000000000000000000000000000000..8f61aa0db1b79e37a3687a3ad1688896ddfe460e --- /dev/null +++ b/data/json/DLP/897477.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "897477", + "reporterName" : "Kelly Bai", + "rankPoints" : "150", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCD9090: watch dog invalid during all voltage monitor rail faults", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 22", + "queryText" : "Part Number: UCD9090 Hi team, In the application of watchdog, ucd9090, we found that when all rails shutdown due to a fault, watchdog would be invalid also, is this normal reaction for ucd9090? To be specific, our FPGA had an output to toggle ucd9090’s WDI to reset the watchdog counter within the reset period we set, when a fault happened (one rail shorted) then all rails turned off, so FPGA would not toggle WDI in time and WDO should be active, however, what we observed is WDO was not active. Also, UCD9090's power supply is on our permanent domain, it was not turned off. Actually, I was able to monitor the status of all rails in real time via usb adapter on Fusion when all rails shutdown. I can confirm that the watchdog was configured well, and I have verified that by stopping the toggle, which can trigger watchdog normally when all rails were up. So why when all rails turned off then WDO was not active?", + "partNumber" : " UCD9090", + "allResponseList" : [ { + "contentId" : "3318052", + "userName" : "yihe", + "rankPoints" : "23920", + "rankName" : "Mastermind", + "date" : "Apr 16, 2020 1:49 PM", + "userId" : "303879", + "content" : "Hello Could you provide their project file? Do they have the \"Disable until System Reset release\" feature set under system watchdog setting? Regards Yihe" + }, { + "contentId" : "3325706", + "userName" : "yihe", + "rankPoints" : "23920", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 2:18 PM", + "userId" : "303879", + "content" : "Hi This issues had been addressed in the email. The watchdog disable is due to that it watches SYSTEM RESET signal. I will close this. Regards Yihe" + } ], + "tags" : [ "/support/power-management/f/196/tags/ucd9090" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897478.json b/data/json/DLP/897478.json new file mode 100644 index 0000000000000000000000000000000000000000..6fc1998deeb4481b1e75647e32a0548976ad1341 --- /dev/null +++ b/data/json/DLP/897478.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "897478", + "reporterName" : "Shambavi P", + "rankPoints" : "90", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ27542-G1: Getting Error: VOK not cleared during the Battery Learning cycle", + "rankName" : "Prodigy", + "replies" : " 6", + "views" : " 37", + "queryText" : "Part Number: BQ27542-G1 Hi, I am getting an Error: VOK not cleared during the Battery Learning cycle and the cycle was cancelled. Cycle started with Discharge-Relax-Charge-Relax- (ERROR: VOK not Cleared and cycle stopped) In the Bqstudio, Register status VOK is LOW after the relax. But still the error was VOK not cleared after relax and because of this the cycle was cancelled. I am attaching the screenshots for your reference. Kindly suggest me the answer for this. Thanks in advance. Regards, Shambavi", + "partNumber" : " BQ27542-G1", + "allResponseList" : [ { + "contentId" : "3318465", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 16, 2020 7:12 PM", + "userId" : "1864278", + "content" : "Please share a bqStudio log and the srec file before you did the learning cycle. Andy" + }, { + "contentId" : "3319095", + "userName" : "Shambavi P", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 17, 2020 7:52 AM", + "userId" : "6283986", + "content" : "Hi Andy, Thanks for the reply. I am sharing the bqStudio log which is generated during ChemID selection process and the srec file. (During the learning cycle, it was not possible to collect the log).1538.final_chemID-report.zipmonday chemid log (1) (1).zipmonday chemid log.zip8780.0542_2_01-bq27542G1_Hamdy_1000mah_LC1.zip Also I'm attaching the GPC report which is generated for the bqStudio log (I have programmed the best matching ChemID 452 from the GPC report). Thanks in advance. Regards, Shambavi" + }, { + "contentId" : "3319845", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 17, 2020 6:02 PM", + "userId" : "1864278", + "content" : "Hi Shambavi, The bqStudio log you submitted to the GPCCHEM tool is NOT what I am looking for. I would suggest you not use the Leaning Cycle tab. Instead, follow the app note below to manually run the learning cycle step by step and then you will able to capture a bqStudio log file. Andy" + }, { + "contentId" : "3327851", + "userName" : "Shambavi P", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 25, 2020 1:22 PM", + "userId" : "6283986", + "content" : "Hi Andy, I followed your manual for my learning cycle. Charging was completed when the battery reached 97%, the voltage was 4132mV and the FC bit was NOT set so not able to complete the learning cycle. Initially Maximum battery voltage was 4200mV, since the charging was not reaching to 100%, we changed the maximum battery voltage to 4100mV and tried again, But still battery voltage is not reaching to 100% and FC bit is not set. I have set the following parameters in the Data memory section of bqStudio. Maximum battery voltage:4100mV Design capacity:1100mA Design Voltage:3.7V Charge Term taper current:100mA Dsg current threshold:90mA Charge current threshold:40mA Quit current:10mA Term voltage:3000mV Please find the attached screenshot and autogenerated file log. Thanks in advance. Regards, Shambaviautogeneratedfile.gg.csv" + }, { + "contentId" : "3329462", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 8:30 PM", + "userId" : "1864278", + "content" : "The chemistry id you are using is an obsolete one. I would suggest you use another chemistry id mentioned in the GPC report (e.g. 2603). Also, please share a continuous bqStudio log file for the learning cycle you did. I will take a look and see what might be wrong. Andy" + }, { + "contentId" : "3329882", + "userName" : "Shambavi P", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 28, 2020 4:40 AM", + "userId" : "6283986", + "content" : "Thanks Andy, I will change the ChemID. Please find the attached bqStudio log file. Regards, Shambavi23rd second trial.log" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ27542_2D00_G1", "/support/power-management/f/196/tags/bqStudio" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897480.json b/data/json/DLP/897480.json new file mode 100644 index 0000000000000000000000000000000000000000..2af5acd4f3918777c0a75a95a5a9a76791800195 --- /dev/null +++ b/data/json/DLP/897480.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "897480", + "reporterName" : "Shinichi Inoue", + "rankPoints" : "14445", + "resolutionStatus" : "Resolved", + "ticketName" : "UCC27517: operating ambient temperature range of UCC27517DBVT", + "rankName" : "Guru", + "replies" : " 6", + "views" : " 33", + "queryText" : "Part Number: UCC27517 Dear Specialists, My customer is considering UCC27517DBVT and has questions. I would be grateful if you could advise. --- Thermal information, Could you please let me know (1)detail of evaluation board of si-taJA and si-taJC(top) and si-taJC(bot) 1p or 2S2P, board dimension,board material, copper thickness etc. (2)How could I think about operating temperature range. The datasheet says only junction temperature range. --- I appreciate your great help in advance. Best regards, Shinichi", + "partNumber" : " UCC27517", + "allResponseList" : [ { + "contentId" : "3318597", + "userName" : "Mamadou Diallo", + "rankPoints" : "7305", + "rankName" : "Expert", + "date" : "Apr 16, 2020 9:38 PM", + "userId" : "4708570", + "content" : "Hello Shinichi, Thanks for reaching out. 1. The link below discusses thermal considerations ofcompany devices. /lit/an/spra953c/spra953c.pdf 2. The junction temperature range in the datasheet represent the operating conditions of the device as switching transitions cause power dissipation across the driver, which induce a temperature which must be within this specified junction. Using the link below, you can extract your max ambient temperature at a given switching frequency, VDD, load, etc... /support/power-management/f/196/p/788867/2917563#2917563 Regards, -Mamadou" + }, { + "contentId" : "3318774", + "userName" : "Shinichi Inoue", + "rankPoints" : "14445", + "rankName" : "Guru", + "date" : "Apr 17, 2020 1:35 AM", + "userId" : "5999045", + "content" : "Hi Mamadou, Thank you for your reply. Could you please advise more detail. --- 1. According to the SPRA953C, two thermal resistance values of 1s and 2s2p are shown. 1S and 2S2P are understood as the measured board conditions specified by JEDEC. On the other hand, the UCC27517 data sheet does not clearly state which board, 1S or 2S2P, was used. Please let us know which board was used, 1S or 2S2P, in UCC27517, including the board size and copper thickness. The customer'd like to know the information. 2, The operating ambient temperature range is not specified. It is necessary to calculate by device power dissipation, si-taJA and junction temperature. My understandig is correct? --- I appreciate your great help and cooperation. Best regards, Shinichi" + }, { + "contentId" : "3320055", + "userName" : "Mamadou Diallo", + "rankPoints" : "7305", + "rankName" : "Expert", + "date" : "Apr 17, 2020 10:24 PM", + "userId" : "4708570", + "content" : "Hello Shinichi, 1. We use a 2s2p board in the simulations to determine thermal. 2. The operating ambient temperature is not specified because our drivers specifications are based on the junctions operating conditions that we control. Calculating power dissipation will give a more accurate ambient temperature. Regards, -Mamadou" + }, { + "contentId" : "3320614", + "userName" : "Shinichi Inoue", + "rankPoints" : "14445", + "rankName" : "Guru", + "date" : "Apr 20, 2020 1:58 AM", + "userId" : "5999045", + "content" : "Hi Mamadow, Thank you for your reply. We understand 2S2P board is used for determining thermal data. I could find an application note(SZZA017A) described 2S2P boards. It is described Trace thickness, Trace length, PCB thickness, PCB width, PCB length and Power/ground-plane thickness. /lit/an/szza017a/szza017a.pdf Could we introduce this document to the customer as the measurement condition of thermal resistance. I appreciate your great help and cooperation. Best regards, Shinichi" + }, { + "contentId" : "3321776", + "userName" : "Mamadou Diallo", + "rankPoints" : "7305", + "rankName" : "Expert", + "date" : "Apr 20, 2020 6:23 PM", + "userId" : "4708570", + "content" : "Shinichi, THe document is available on therefore you may share with customer. Regards, -Mamadou" + }, { + "contentId" : "3322082", + "userName" : "Shinichi Inoue", + "rankPoints" : "14445", + "rankName" : "Guru", + "date" : "Apr 20, 2020 11:38 PM", + "userId" : "5999045", + "content" : "Hi Madadou, Thank you for your reply. We'll share your answer and the application note with the customer. We appreciate your great help and cooperation. Best regards, Shinichi" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC27517" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897481.json b/data/json/DLP/897481.json new file mode 100644 index 0000000000000000000000000000000000000000..62c30f1ea512e7af3135c0688a5200f2ef16e26c --- /dev/null +++ b/data/json/DLP/897481.json @@ -0,0 +1,79 @@ +{ + "ticketNumber" : "897481", + "reporterName" : "cyan zhou", + "rankPoints" : "900", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS61041: TPS61041DBVR： About Material content of this device.", + "rankName" : "Intellectual", + "replies" : " 8", + "views" : " 62", + "queryText" : "Part Number: TPS61041 Hicompany Expert, We are now using TPS61041DBVR, we want to know its material content: here is the search result on /materialcontent/en/search?partType=tiPartNumber&partNumber=TPS61041DBVR Below is the result with two different mass, we have a question: what's the difference between them? How can we distinguish from them? We can only get the informations from IC MARKING and package Label.", + "partNumber" : " TPS61041", + "allResponseList" : [ { + "contentId" : "3318864", + "userName" : "Zack Liu", + "rankPoints" : "12485", + "rankName" : "Genius", + "date" : "Apr 17, 2020 2:49 AM", + "userId" : "4961181", + "content" : "Hi Cyan, Both these two devices would commit the EC table specs. The only difference is they are built in twocompany sites so there is a little difference with Mass weight. You can buy either one." + }, { + "contentId" : "3318896", + "userName" : "user6325641", + "rankPoints" : "10", + "rankName" : "Prodigy", + "date" : "Apr 17, 2020 3:36 AM", + "userId" : "6325641", + "content" : "Hi Zack which one should I download from the multi-item and mail to customer? It Cannot be identified from the same Part Number." + }, { + "contentId" : "3318908", + "userName" : "cyan zhou", + "rankPoints" : "900", + "rankName" : "Intellectual", + "date" : "Apr 17, 2020 3:49 AM", + "userId" : "4226617", + "content" : "Hi Zack, Thanks for your reply. which one should I download from the multi-item and mail to customer? It Cannot be identified from the same Part Number. We must ensure the exact device that which one is we bought?" + }, { + "contentId" : "3318948", + "userName" : "Zack Liu", + "rankPoints" : "12485", + "rankName" : "Genius", + "date" : "Apr 17, 2020 5:09 AM", + "userId" : "4961181", + "content" : "Hi Cyan, Oncompany store if you input TPS61041DBVR, there is only one showing up. That's the one you buy." + }, { + "contentId" : "3318996", + "userName" : "cyan zhou", + "rankPoints" : "900", + "rankName" : "Intellectual", + "date" : "Apr 17, 2020 6:07 AM", + "userId" : "4226617", + "content" : "Hello Zack, We need to know, which one is bought? 18.5mg? or 20.3mg? How to distinguish? Are these two devices shipped at random? this is, in short, customer bought TPS61041DBVR from Arrow, then they need the Material content of this device. Whick one is the exact value? Can we distinguish by the information ofcompany Sites?" + }, { + "contentId" : "3319040", + "userName" : "Zack Liu", + "rankPoints" : "12485", + "rankName" : "Genius", + "date" : "Apr 17, 2020 6:58 AM", + "userId" : "4961181", + "content" : "Hi Cyan, OK. Got your meaning. If you can provide the label of the box, we can search where it is manufactured." + }, { + "contentId" : "3322167", + "userName" : "Zack Liu", + "rankPoints" : "12485", + "rankName" : "Genius", + "date" : "Apr 21, 2020 1:49 AM", + "userId" : "4961181", + "content" : "Hi Cyan, Is there any update?" + }, { + "contentId" : "3322194", + "userName" : "cyan zhou", + "rankPoints" : "900", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 2:15 AM", + "userId" : "4226617", + "content" : "Hi Zack, Thanks for your support. I think we have get your meaning. you can close this case. thanks. Cyan" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS61041" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897497.json b/data/json/DLP/897497.json new file mode 100644 index 0000000000000000000000000000000000000000..8c16ef0f993d8f6dedcc9f886a18bfe5a9c89694 --- /dev/null +++ b/data/json/DLP/897497.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "897497", + "reporterName" : "Harry cheng", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ25606: BQ25606", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 21", + "queryText" : "Part Number: BQ25606 Nice to meet you. We create BQ25606 charge IC schematic. See attachment. We would like to have battery charging mode and Boost mode in our design. We have one question. If we do not use MCU to control OTG pin, Can you suggest a design to control OTG? And then BQ25606 can automatically change between boost mode (no USB adaptor plugin) and buck mode(USB adaptor is pluging).If OTG pin pull high anytime and USB is no plugin, it is in boost mode(VBUS = 5.15v). Thanks in advance.Power_v1_3.pdf", + "partNumber" : " BQ25606", + "allResponseList" : [ { + "contentId" : "3318978", + "userName" : "Ning T", + "rankPoints" : "15365", + "rankName" : "Genius", + "date" : "Apr 17, 2020 5:46 AM", + "userId" : "145100", + "content" : "Hi, Please visit /support/power-management/f/196/t/890626 for BQ25606: Schematic Review and PCB Layout Design Tips. Additional Information including FAQs is available /lit/an/slva924/slva924.pdf Designing A Standalone Single Cell 3-A Charger with the bq25606. Referring to 8.3.3 Boost Mode Operation From Battery on the d/s, if the OTG pin is pulled high all the time, the boost operation can be enabled automatically if the conditions are valid: 1. BAT above VOTG_BAT 2. VBUS less than BAT+VSLEEP (in sleep mode) 3. Voltage at TS (thermistor) pin as a percentage of VREGN is within acceptable range (VBHOT < VTS < VBCOLD) 4. After 30-ms delay from boost mode enable Thanks, Ning." + }, { + "contentId" : "3319170", + "userName" : "Harry cheng", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 17, 2020 8:56 AM", + "userId" : "6017412", + "content" : "Do you have any suggestion to design a schematic to control OTG pin in ordering that BQ25606 IC can automatically switch to boost mode (no USB adpator plugin) and buck mode( USB adpator plugin)?" + }, { + "contentId" : "3326561", + "userName" : "Ning T", + "rankPoints" : "15365", + "rankName" : "Genius", + "date" : "Apr 24, 2020 3:17 AM", + "userId" : "145100", + "content" : "Hi, If the OTG pin is pulled high, the device may automatically enter buck or boost mode when the corresponding conditions are met. Thanks, Ning." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25606" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897529.json b/data/json/DLP/897529.json new file mode 100644 index 0000000000000000000000000000000000000000..0f71681199a47d0dc247af18724fdf3eb682080b --- /dev/null +++ b/data/json/DLP/897529.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "897529", + "reporterName" : "Rohit Kadecha", + "rankPoints" : "440", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ76930: Current calibration needed and temperature & voltage too", + "rankName" : "Intellectual", + "replies" : " 4", + "views" : " 27", + "queryText" : "Part Number: BQ76930 Dear All, I had build Bq76930 based 20s Bms , but now problem is calibration , can some one please help with logic of how to do calibration? My Load current maximum is 60A, @ 10Ampere actual measured current is some time 8A or 12A, where as @ 60A it is either 65 or 55A. I mean to say is current variation from measured to actual is non linear. Request some one to help resolve it. Similarly am facing issue with temperature calibration and cell voltage calibration, please share logic for calibration. Also wanted to share that if i my load current deviates by 5-6A after 4 hours of continous operation, and i had used mosfets as a switch in BMS. Actually it should remain stable through out operation, but it keeps on varying with time and may be temperature by 5-6A from actual, whihc am unable to understand why? Please comment or help to resolve it. I have CAN in my project fro external communication. Rohit", + "partNumber" : " BQ76930", + "allResponseList" : [ { + "contentId" : "3318634", + "userName" : "WM5295", + "rankPoints" : "39810", + "rankName" : "Mastermind", + "date" : "Apr 16, 2020 10:09 PM", + "userId" : "17523", + "content" : "Hi Rohit, The coulomb counter is typically very linear through midrange (around 0) and may roll off near full scale. Note the CCRANGE is less than the CCFSR. If you are seeing a non-linearity in the current which varies quickly with current or time, look for a temperature coefficient of the sense resistor, solder for the sense resistor, or traces on the board at the connection for the sense resistor. As the component and interconnect heats the voltage and apparent current change. The BQ76930EVM for example has a sense resistor with a large temperature coefficient. A 4 terminal sense resistor can be used to sense the voltage on the resistor avoiding the heating of the interconnect, but is more costly. Also consider the sense resistor value you are using, a small sense resistor is desired to keep the power dissipation down inside the BMS, but it gives a coarse resolution and a small change in resistance may represent a large current. BQ76930 current calibration is typically 2 stages, first to remove the offset with 0 current, second to apply a reasonably identifiable current to calibrate gain. This gives the best accuracy over most of the range. This may be good for a system which operates over a variety of currents with occasional peaks. If you calibrate at or near full scale, gain will be accurate there but may have larger error than the other method over most of the useful range. This may be good for a system which comes on and operates at full (peak) current until the pack is depleted. Select the method which best suits your system use." + }, { + "contentId" : "3322568", + "userName" : "Rohit Kadecha", + "rankPoints" : "440", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 9:27 AM", + "userId" : "6003292", + "content" : "Hi , Thanks for revert. Temperature coefficient of my sense resistor is 75 ppm/degree centigrade, and Tida 01093 is having TCR of 75 ppm/degree centigrade. It means we have better TCR compared to what TIDA has used, in such case current variation should happen is less. But it is not the case. So please suggest what else could be the reason for current drift? Secondly regarding Current calibration am unable to understand what u saying, please share some methos algorithm if possible or some link to understand it better. Also i was wondering if i can remove controller from my BMS board keeping just Bq76940 chip, but than how to configure it every time i wan to change some configurations? Is their any App available fromcompany to do configuation ? Also i assume that Bqstudio is their but it is used along with Gauge chip , which i do not have in my design currently. So suggest appropriate Application. Rohit" + }, { + "contentId" : "3322572", + "userName" : "Rohit Kadecha", + "rankPoints" : "440", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 9:30 AM", + "userId" : "6003292", + "content" : "My Shunt resistor Part number:- WSLP3921, WSLP5931 (75 ppm/c). Tida SHunt PArt NUmber:- WSR21L000FEA (TCR-750 ppm/c)." + }, { + "contentId" : "3323506", + "userName" : "WM5295", + "rankPoints" : "39810", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 9:55 PM", + "userId" : "17523", + "content" : "Hi Rohit, It sounds like your resistor should be capable, check the ratings of the specific part you are using. If you are using a 1 mOhm, you will have 3.6 W at 60A. See what temperature rise you are getting on the resistor. Measure the voltage across the resistor and measure the voltage at the SRP/SRN pins to the BQ76930 with the current, see how it changes. I can't recall a calibration document for CC. The BQStudio calibration tool for BQ78350-R1 shows a CC offset and current gain calibration. Calibrate offset first. The technical reference manual may have some description. The BQ76940 Evaluation software will use the same interface adapter as BQStudio, but it is a separate software. See the BQ76930 product folder Software development section /product/BQ76930#design-development or /lit/zip/sluc539 . The EV2400 has pull ups to 3.3V, disconnect a sensitive MCU before connecting onto the bus with the MCU." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ76930" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897532.json b/data/json/DLP/897532.json new file mode 100644 index 0000000000000000000000000000000000000000..37e832dff7dd263fb901033ed27b4797ae2fb0c9 --- /dev/null +++ b/data/json/DLP/897532.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "897532", + "reporterName" : "Prasanna Adapa", + "rankPoints" : "20", + "resolutionStatus" : "", + "ticketName" : "TI Library version details", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 38", + "queryText" : "We are usingcompany Library version 201 for our internal purpose. I want to know any further versions released on top pf v201.", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3318263", + "userName" : "Kevin Allen18", + "rankPoints" : "17675", + "rankName" : "Genius", + "date" : "Apr 16, 2020 4:01 PM", + "userId" : "5018895", + "content" : "Hi Prasanna, Are you asking about C2000 libraries? If so, what specifically, maybe ControlSuite? See C2000ware for newer C2000 SW files: /tool/C2000WARE Best, Kevin" + }, { + "contentId" : "3319232", + "userName" : "Prasanna Adapa", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 17, 2020 9:55 AM", + "userId" : "6325929", + "content" : "Thanks for your reply Kevin. We are used this product in 2015 when i was not part of the organisation. Recently i started working on the project which usedcompany Library v201 The document describing \"company Library is a driver library is used by the UI module or Host processor of the Emerald generator for controlling or managing the IO peripherals. The \"Host\", handles the User Interface, dosage error checks and external communications and the hardware environment is F28M35H52C1. with above details can you please help me which product is this and latest version available is? Thanks, Prasanna A F28M35H52C1" + }, { + "contentId" : "3323402", + "userName" : "Kevin Allen18", + "rankPoints" : "17675", + "rankName" : "Genius", + "date" : "Apr 21, 2020 8:02 PM", + "userId" : "5018895", + "content" : "Hi Prasanna, F28M35x device support is in the ControlSUITE SW suite. You can find relevant files for the device in the below directory after installation: C:\\ti\\controlSUITE\\device_support\\f28m35x\\v220 Best, Kevin" + } ], + "tags" : [ ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897533.json b/data/json/DLP/897533.json new file mode 100644 index 0000000000000000000000000000000000000000..42082e175aaf9fe6855e9caf58e357f6ef5e2812 --- /dev/null +++ b/data/json/DLP/897533.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "897533", + "reporterName" : "Koji Hayashi92", + "rankPoints" : "4905", + "resolutionStatus" : "", + "ticketName" : "IWR6843AOPEVM: mmWave Studio 2.0.02 error", + "rankName" : "Genius", + "replies" : " 10", + "views" : " 72", + "queryText" : "Part Number: IWR6843AOPEVM Hi TI-team My customer use mmWave Studio 2.0.02. An error occurred and I could not solve it by restarting the PC and reinstalling the software. The error occurred after performing the steps ① to ⑫ of the attached file. Sheet: log is attached when they occur in log. E2E.xlsx Please tell me the solution and the cause. Best Regards, Koji Hayashi", + "partNumber" : " IWR6843AOPEVM", + "allResponseList" : [ { + "contentId" : "3318139", + "userName" : "zigang Yang", + "rankPoints" : "7975", + "rankName" : "Expert", + "date" : "Apr 16, 2020 2:46 PM", + "userId" : "44611", + "content" : "HI, Koji: That is really strange. I never see an error during the static configuration if it passed all the previous stages. Did you use the GUI to send all the command in radar studio? Did you have a second radar device to try? Did you able to run out of box demo on the same device? Best, Zigang" + }, { + "contentId" : "3318260", + "userName" : "zigang Yang", + "rankPoints" : "7975", + "rankName" : "Expert", + "date" : "Apr 16, 2020 3:58 PM", + "userId" : "44611", + "content" : "Hi, Koji: Our design team suggest to delete the RSTD folder as a whole present under C:\\Users\\\\AppData\\Roaming location. Best, Zigang" + }, { + "contentId" : "3320753", + "userName" : "Koji Hayashi92", + "rankPoints" : "4905", + "rankName" : "Genius", + "date" : "Apr 20, 2020 5:42 AM", + "userId" : "4971279", + "content" : "Hi Zigang-san I confirmed with my customer. They deleted RSTD, but I still get the error. The error is occurring in another EVM. The same error occurs in SET of StaticConfig and DataConfig. No error has occurred in Sensor Configuration of SensorConfig. Best Regards, Koji Hayashi" + }, { + "contentId" : "3321479", + "userName" : "zigang Yang", + "rankPoints" : "7975", + "rankName" : "Expert", + "date" : "Apr 20, 2020 3:25 PM", + "userId" : "44611", + "content" : "I am sending your feedback to the designers. I noticed that you are trying complex2x mode, do you meant for that? Usually by default, we program it to complex 1x mode. Best, Zigang" + }, { + "contentId" : "3324399", + "userName" : "zigang Yang", + "rankPoints" : "7975", + "rankName" : "Expert", + "date" : "Apr 22, 2020 2:26 PM", + "userId" : "44611", + "content" : "Here is the suggestion coming from the design team: Please double check that the correct Matlab runtime engine is installed. Sometimes, a standalone Matlab version might support the opening of Studio and doesn’t explicitly show that the runtime engine wasn’t installed. Best, Zigang" + }, { + "contentId" : "3325378", + "userName" : "Koji Hayashi92", + "rankPoints" : "4905", + "rankName" : "Genius", + "date" : "Apr 23, 2020 7:54 AM", + "userId" : "4971279", + "content" : "Hi Zigang-san Thank you for answer. What is the correct version of Matlab runtime engine that can run IWR6843AOPEVM ? Best Regards, Koji Hayashi" + }, { + "contentId" : "3325742", + "userName" : "zigang Yang", + "rankPoints" : "7975", + "rankName" : "Expert", + "date" : "Apr 23, 2020 2:38 PM", + "userId" : "44611", + "content" : "Hi, Koji: IT is mentioned in the radar studio users guide: Install 32-bit Matlab Runtime Engine (Version 8.5.1): It is used to run the Post-Processing utility within mmWaveStudio. in.mathworks.com/.../MCR_R2015aSP1_win32_installer.exe Do not forget it is 32 bit. Best, Zigang" + }, { + "contentId" : "3326447", + "userName" : "Koji Hayashi92", + "rankPoints" : "4905", + "rankName" : "Genius", + "date" : "Apr 24, 2020 1:03 AM", + "userId" : "4971279", + "content" : "Hi Zigang-san Thank you for quick response. Does that mean it can only be used with 32bit Windows ? I confirmed with the customer. They were using MCR_R2015aSP1_win32_installer.exe. Best Regards, Koji Hayashi" + }, { + "contentId" : "3327213", + "userName" : "zigang Yang", + "rankPoints" : "7975", + "rankName" : "Expert", + "date" : "Apr 24, 2020 3:37 PM", + "userId" : "44611", + "content" : "The 32 bit matlab runtime can be run on 64 bit windows. The error message you sent over in the original file has foreigner languages, that our designer can not understand. Is there a way that you can translate it or show the error in English? Best, Zigang" + }, { + "contentId" : "3328181", + "userName" : "Koji Hayashi92", + "rankPoints" : "4905", + "rankName" : "Genius", + "date" : "Apr 27, 2020 12:31 AM", + "userId" : "4971279", + "content" : "Hi Zigang-san Thank you for response. I have attached an error.log translated into English. E2E_en.xlsx Please confirm the attached file. Best Regards, Koji Hayashi" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR6843AOPEVM" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897545.json b/data/json/DLP/897545.json new file mode 100644 index 0000000000000000000000000000000000000000..a5636b01408756bf4e07f4ed29a009823389a2fa --- /dev/null +++ b/data/json/DLP/897545.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "897545", + "reporterName" : "Dieter Dornberger1", + "rankPoints" : "110", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS2663: Threshold for POR", + "rankName" : "Prodigy", + "replies" : " 5", + "views" : " 42", + "queryText" : "Part Number: TPS2663 Hello, what are the threshold voltages for POR (TPS2663, not in data sheet)", + "partNumber" : " TPS2663", + "allResponseList" : [ { + "contentId" : "3318155", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 16, 2020 2:56 PM", + "userId" : "4743883", + "content" : "Hi Dieter, 4.5V is the minimum operating voltage. Let me check on Vin POR hysteriss and thresholds? By the way, what is your application ? Do you want to use it for 5V rail ? Regards, Rakesh" + }, { + "contentId" : "3322438", + "userName" : "Dieter Dornberger1", + "rankPoints" : "110", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 7:17 AM", + "userId" : "4021681", + "content" : "Hi Rakesh, POR hysteresis and thresholds are very important for our design, cause we have some voltage drops from the power supply to the TPS2663. Yes, we want to use it for 5V rail. Regard, Dieter" + }, { + "contentId" : "3322603", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 9:59 AM", + "userId" : "4743883", + "content" : "Hi Dieter, I am checking whether we have data for that parameter. Any specific reason to use 60V rated device for 5V rail ? we have TPS2595, TPS25982 which are more suitable for 5V rail application. Regards, Rakesh" + }, { + "contentId" : "3323777", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 4:46 AM", + "userId" : "4743883", + "content" : "Hi Dieter, The typical values of Vin_POR_rising threshold is 4.3 V and falling threshold is 4.2V. So, the typical POR hysteresis is 100mV Regards, Rakesh" + }, { + "contentId" : "3323888", + "userName" : "Dieter Dornberger1", + "rankPoints" : "110", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 7:02 AM", + "userId" : "4021681", + "content" : "Hi Rakesh, thank your for this information. We start our design with TPS2595 Thanks & Regards Dieter" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS2663" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897553.json b/data/json/DLP/897553.json new file mode 100644 index 0000000000000000000000000000000000000000..ee872abfc8e8dfec206610deab2c963f8cd775b2 --- /dev/null +++ b/data/json/DLP/897553.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "897553", + "reporterName" : "Shunsuke Nagata", + "rankPoints" : "7080", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TL7702B: Vit- internal circuit", + "rankName" : "Expert", + "replies" : " 4", + "views" : " 21", + "queryText" : "Part Number: TL7702B Hi, Could you please give me advice about TL7702B, TL7705B and TL7733B? My customer would like to adjust voltage divider rate which consists R1 and R2 by adding series resister at SENSE pin. Then, he would like to know below information . 1. Is the Vx made from Vcc? or made from Reference Voltage 1 (REF)? Vx voltage is higher than REF. I guess Vx made from Vcc. Is it correct? 2. Could you please give me R1 and R2 information for TL7702B, TL7705B and TL7733B? I found application note (http://www.tij.co.jp/jp/lit/an/slvae04/slvae04.pdf) There are TL7702 and TL7705 information. But are these data same as TL7702B and TL7705B? And could you please let me know R1 and R2 data of TL7733B? 3. Do you have reference schematic which adjust divider rate of R1 and R2 by adding resister at SENSE pin? Regards, Nagata.", + "partNumber" : " TL7702B", + "allResponseList" : [ { + "contentId" : "3318713", + "userName" : "Michael_DeSando", + "rankPoints" : "12320", + "rankName" : "Genius", + "date" : "Apr 16, 2020 11:44 PM", + "userId" : "3482499", + "content" : "Nagata, I was able to locate old version datasheet for TL7702B and TL7705B. 1. From block diagram, Vx comes from the reference voltage and reference voltage comes from Vcc. But the Vx voltage is not directly equal to reference voltage which is why there is the adjustable resistor symbol in between the reference and Vx. This indicates the Vx changes depending on the device variant. 2. From previous revision of datasheet beforecompany switched to new format for datasheets, I found the schematic attached. 3. We typically don't recommend adding series resistor to change voltage threshold because the additional resistor provides more inaccuracy because of the tolerance of the external resistors and also the internal resistors have tolerance. A resistor divider is usually a more accurate approach but I think a series resistor can also work since the internal resistor value estimates are known. If you can tell me more about the application, I can recommend a newer and better device with the correct threshold." + }, { + "contentId" : "3318722", + "userName" : "Shunsuke Nagata", + "rankPoints" : "7080", + "rankName" : "Expert", + "date" : "Apr 17, 2020 12:01 AM", + "userId" : "777384", + "content" : "Hi, Michael Thank you very much for your support. Could you please let me check about your #1 comment? Is the resister which is for Vx connected between Vcc and GND? Regards, Nagata." + }, { + "contentId" : "3318802", + "userName" : "Shunsuke Nagata", + "rankPoints" : "7080", + "rankName" : "Expert", + "date" : "Apr 17, 2020 2:04 AM", + "userId" : "777384", + "content" : "Hi, Michael, Could you please let me know the your recommend device which user can adjust threshold voltage via SENSE? Regards, Nagata." + }, { + "contentId" : "3322017", + "userName" : "Michael_DeSando", + "rankPoints" : "12320", + "rankName" : "Genius", + "date" : "Apr 20, 2020 10:02 PM", + "userId" : "3482499", + "content" : "Nagata, The Vx value is shown above in Note A for each device variant. For TL7702B, Vx = Vref. For TL7705B and TL7733B, Vx ~1.43V. Our top devices with separate adjustable SENSE pin, please try TPS3890 (smaller SON package, adjustable to monitor any voltage of 1.15V or higher) or TPS3808 (SOT23 package, adjustable to monitor any voltage of 0.4V or higher)." + } ], + "tags" : [ "/support/power-management/f/196/tags/TL7705B", "/support/power-management/f/196/tags/TL7733B", "/support/power-management/f/196/tags/TL7702B" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897577.json b/data/json/DLP/897577.json new file mode 100644 index 0000000000000000000000000000000000000000..bc25ab57f082683dd7b62a24cd2ac564e4b04ec2 --- /dev/null +++ b/data/json/DLP/897577.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "897577", + "reporterName" : "Marco Maioli", + "rankPoints" : "140", + "resolutionStatus" : "", + "ticketName" : "TPS63020: TPS63020", + "rankName" : "Prodigy", + "replies" : " 5", + "views" : " 30", + "queryText" : "Part Number: TPS63020 Hi, I utilized tps63020 with a supercapacitor in order to obtain a backup power supply. (see attached file: PMP9766 - Supercapacitor Backup Power Supply with Active Cell Balancing-). I used more or less the same configuration visible in attached file PMP9766 SCHEMATICS, It works but i don't understand why the tps63020 stop working when the capacitor is still 3Volt charged. i hope The componet should output 5 volt unless capacitor is 1.8 V (like datasheet say). it could be a problem of VTH? I tried changed Vtrashold but the result is similar. if someone could help me i would appreciate it! Thanks PMP9766.pdfPMP9766_SCHEMATIC.pdf", + "partNumber" : " TPS63020", + "allResponseList" : [ { + "contentId" : "3319380", + "userName" : "Milos", + "rankPoints" : "7260", + "rankName" : "Expert", + "date" : "Apr 17, 2020 12:44 PM", + "userId" : "5692358", + "content" : "Hi Marco, Thanks for reaching out. Do you meant that the supercap stops charging at 3 V instead of 5 V? Best regards, Milos" + }, { + "contentId" : "3320978", + "userName" : "Marco Maioli", + "rankPoints" : "140", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 9:31 AM", + "userId" : "3573258", + "content" : "nope, the supercap continue charging always. The real problem is when it is fully charged and start as backup power supply. Teorically tps63020 works fine with 5volt output untill input is 1.8 volt. under this voltage the output goes low. In may case this is not happen. the output goes low when the voltage on supercap is about 3,5 volt and not 1.8v. can it a problem of voltage divider VTH? THANKS" + }, { + "contentId" : "3321192", + "userName" : "Marco Maioli", + "rankPoints" : "140", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 1:06 PM", + "userId" : "3573258", + "content" : "nope, the supercap continue charging always. The real problem is when it is fully charged and start as backup power supply. Teorically tps63020 works fine with 5volt output untill input is 1.8 volt. under this voltage the output goes low. In may case this is not happen. the output goes low when the voltage on supercap is about 3,5 volt and not 1.8v. can it a problem of voltage divider VTH? THANKS" + }, { + "contentId" : "3321240", + "userName" : "Milos", + "rankPoints" : "7260", + "rankName" : "Expert", + "date" : "Apr 20, 2020 1:34 PM", + "userId" : "5692358", + "content" : "Hi Marco, This does not seem to be caused by VTH signal. VTH signal is used to stop charging the capacitor when its voltage reaches ~5.1 V, and to recharge it whenever its voltage drops to ~4.7 V. Could you check where the EN pin of the TPS63020 is connected to? It should be connected to VIN/VC. Can you please take scope plots for VC, Vsys and VPS during the discharge from 5 V to 3.5 V? Best regards, Milos" + }, { + "contentId" : "3327037", + "userName" : "Marco Maioli", + "rankPoints" : "140", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 1:19 PM", + "userId" : "3573258", + "content" : "en pin is connected to Vin. for the other singlas i will send a scope plots." + } ], + "tags" : [ "/support/power-management/f/196/tags/PMP9766", "/support/power-management/f/196/tags/TPS63020", "/support/power-management/f/196/tags/supercapacitor" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897578.json b/data/json/DLP/897578.json new file mode 100644 index 0000000000000000000000000000000000000000..e668dea7abfd97b732b679c0430eb080a68567c4 --- /dev/null +++ b/data/json/DLP/897578.json @@ -0,0 +1,71 @@ +{ + "ticketNumber" : "897578", + "reporterName" : "Kengo.Y", + "rankPoints" : "3980", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC27710: About operation.", + "rankName" : "Genius", + "replies" : " 7", + "views" : " 36", + "queryText" : "Part Number: UCC27710 Hi team. My customer uses only high side of UCC27710. However, it starts and stops repeatedly. Could you tell me what kind of factor causes it to stop? The waveform is follow. Vout is across the capacitor. If you need additional waveforms, please let me provide details. Sincerely. Kengo.", + "partNumber" : " UCC27710", + "allResponseList" : [ { + "contentId" : "3318126", + "userName" : "Richard Herring", + "rankPoints" : "9680", + "rankName" : "Genius", + "date" : "Apr 16, 2020 2:40 PM", + "userId" : "618157", + "content" : "Hello Kengo, Thank you for supporting the UCC27710 with your customer. It looks like there is an issue with the HB-HS high side bias maintaining voltage during the long periods. The boot capacitor is charged from VDD when the switch node switches to ground, since this is a high side only driver there is no low side FET to guarantee the switch node will switch close to ground. Depending on the power train loading, the switch node may transition to ground or may not. To minimize the HB bias drop, make sure there is not a low value gate to source resistance on the high side FET, this will discharge the HB capacitor when the HO is high. Refer to the UCC27710 datasheet section 9.2 to size the HB-HS capacitor based on the MOSFET and lowest switching frequency. It will help to see the HS waveform to see if it is switching close to ground. Regards," + }, { + "contentId" : "3322553", + "userName" : "Kengo.Y", + "rankPoints" : "3980", + "rankName" : "Genius", + "date" : "Apr 21, 2020 9:14 AM", + "userId" : "5782639", + "content" : "Hi Richard. Thank you very much for your kind instruction. My customer used the diode for low side. So, HSpin is at GND level. They reviewed the boot capacitor and changed it to 0.22uF. However, it will start and stop. Could you give me your advice? Sincerely. Kengo." + }, { + "contentId" : "3323017", + "userName" : "Richard Herring", + "rankPoints" : "9680", + "rankName" : "Genius", + "date" : "Apr 21, 2020 3:09 PM", + "userId" : "618157", + "content" : "Hello Kengo, Thank you for the update. The first thing to confirm, is to monitor the HB-HS bias voltage with a differential probe and confirm the HB bias is always above the UVLO threshold. We recommend an operating voltage of 10V minimum from HB-HS, the voltage should be maintained above 8.5V to avoid UVLO possible shutdown. Does the boot diode have some resistance in series? Confirm the boot diode resistance, if the resistance is too high it may prevent proper HB capacitor charging. We ususally recommend a 2.2 to 10 Ohm range as a typical value. Regards," + }, { + "contentId" : "3324161", + "userName" : "Kengo.Y", + "rankPoints" : "3980", + "rankName" : "Genius", + "date" : "Apr 22, 2020 11:57 AM", + "userId" : "5782639", + "content" : "Hi Richard. Thank you for your comment. I got the waveform that is the HB-HS(=V-Cboot) bias voltage with a differential probe. There is sufficient voltage, but it has turned off when the target voltage is reached. And then, the Rboot already used 2.2Ω. Are there any other comment you care about? Sincerely. Kengo." + }, { + "contentId" : "3324422", + "userName" : "Richard Herring", + "rankPoints" : "9680", + "rankName" : "Genius", + "date" : "Apr 22, 2020 2:38 PM", + "userId" : "618157", + "content" : "Hello Kengo, It looks like at a certain point the HB-HS capacitor is not being recharged and drops to 0V. Can you confirm with the HB-HS differential probe as in the last plot, and add the HS switch node to confirm the supply is switching, and the UCC27710 HI driver input to see if the controller is stopping the switching operation? It may be that the controller is stopping switching, for some reason, or maybe the switch node stops switching close to ground, which may happen in certain load conditions. Regards" + }, { + "contentId" : "3325048", + "userName" : "Kengo.Y", + "rankPoints" : "3980", + "rankName" : "Genius", + "date" : "Apr 23, 2020 1:10 AM", + "userId" : "5782639", + "content" : "Hi Richard. I confirmed the waveform(bellow), but it also stopped switching. Is there any reason why switching stops? Sincerely. Kengo." + }, { + "contentId" : "3326347", + "userName" : "Richard Herring", + "rankPoints" : "9680", + "rankName" : "Genius", + "date" : "Apr 23, 2020 10:39 PM", + "userId" : "618157", + "content" : "If the VDD is above the UVLO threshold, HB-HS is above the UVLO threshold, and the driver input is active the driver output should respond. It does look like the switch node is going close to ground based on this plot, but can you also confirm, that the controller is providing the signal to the driver IC when the driver switching stops. That is one signal I want to confirm. Regards," + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC27710" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897589.json b/data/json/DLP/897589.json new file mode 100644 index 0000000000000000000000000000000000000000..88d476d8489484849aee3cdaf798ac48219b0c61 --- /dev/null +++ b/data/json/DLP/897589.json @@ -0,0 +1,71 @@ +{ + "ticketNumber" : "897589", + "reporterName" : "Mark Rudolph", + "rankPoints" : "50", + "resolutionStatus" : "", + "ticketName" : "BQ24725A: No Charging possible and BATDRV always 0V", + "rankName" : "Prodigy", + "replies" : " 7", + "views" : " 31", + "queryText" : "Part Number: BQ24725A Hello, Sadly no charging of the battery (3S1P with 3Ah) is possible (ACOK is high). Also the BATDRV Output is always 0V (Even if the AC Adapter is not present). I am using as AC Adapter a lab PSU (24V Current Limit @ 2A) When iam using your Evalboard everything is working fine. The system load is only a tiny 3.3v StepDown Regulator for the MCU. I have attached the schematic and a part of the layout. With friendly regards Mark RudolphBS2000-M4-PSU-039_SCH.PDF", + "partNumber" : " BQ24725A", + "allResponseList" : [ { + "contentId" : "3318839", + "userName" : "Angelo Zhang87", + "rankPoints" : "6530", + "rankName" : "Expert", + "date" : "Apr 17, 2020 2:33 AM", + "userId" : "5346700", + "content" : "Hi Mark, I don't see any obvious errors in your schematic. Can you please provide the following information to help debug this further? 1) What are your register settings? 2) Can you capture a waveform showing VCC, ACOK, PHASE, and REGN during adapter plug-in, similar to Figure 1 in the BQ24725A datasheet? Also, what is the battery voltage during this test? 3) Can you capture another waveform showing VBAT, VSYS, BATDRV, and REGN when only the battery and the system are connected? 4) \"+11V_System\" is the input to your 3.3 V regulator, correct? With a traditional topology charger like the BQ24725A, the system rail can go as high as the adapter voltage (24 V) or as low as the battery voltage. Best regards, Angelo" + }, { + "contentId" : "3319207", + "userName" : "Mark Rudolph", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 17, 2020 9:34 AM", + "userId" : "4215810", + "content" : "Hello Angelo, 1. The register settings are: ChargeVoltageLimit = 12592 mV ChargeCurrentLimit = 1000 mA InputCurrentLimit = 2000 mA _ChargerOptions.bits.Charge_Inhibit = 0u; //Default 0 _ChargerOptions.bits.ACOC_ThresholdAdj = 0u; //Default 1 _ChargerOptions.bits.NotInUse = 0u; //Unused _ChargerOptions.bits.AC_AdapterInication = 0u; //Read Only _ChargerOptions.bits.I_OutSelection = 1u; //Default 0 _ChargerOptions.bits.LearnEnable = 0u; //Default 0 _ChargerOptions.bits.I_FaultLowSideAdj = 1u; //Default 0 _ChargerOptions.bits.I_FaultHiSideAdj = 0u; //Default 1 _ChargerOptions.bits.EMI_FreqAdjEnable = 1u; //Default 0 _ChargerOptions.bits.EMI_FreqAdj = 0u; //Default 0 _ChargerOptions.bits.BAT_DepletionAdj = 3u; //Default 3 _ChargerOptions.bits.WatchdogTimerAdj = 0u; //Default 3 _ChargerOptions.bits.ACOK_DeglitchTime = 1u; //Default 1 but i tryed varies other parameters too. The \"Charge_Inhibit \" was set/reset at runtime without any changes. The communication via I2C is Ok, i can readout my set parameters from the IC. 2. Screenshots Picture 1.png 3. Screenshots Picture 2.png 4. Thanks for the comment, the system voltage can vary between 7V to 28V." + }, { + "contentId" : "3320018", + "userName" : "Angelo Zhang87", + "rankPoints" : "6530", + "rankName" : "Expert", + "date" : "Apr 17, 2020 9:31 PM", + "userId" : "5346700", + "content" : "Hi Mark, Thanks for the additional information. However, why would VSYS go up to 28 V if your adapter is 24 V? Let's try a simple test as a sanity check for the BATDRV issue. Disconnect everything from your board - the adapter, the system load, the battery, and the host MCU. Now, apply a voltage from BAT to GND using either a power supply or a real battery. BATDRV should rise to SRN + 6 V, thus turning the BATFET on and allowing the battery to power the VSYS rail. If even this test doesn't work, then it's possible that your BQ24725A IC is damaged. When I try this on an EVM and apply 12 V to BAT, then BATDRV rises to 18 V to turn on the BATFET, and VSYS = 12 V, as expected. Best regards, Angelo" + }, { + "contentId" : "3321518", + "userName" : "Mark Rudolph", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 3:47 PM", + "userId" : "4215810", + "content" : "Hi Angelo, The System Voltage will never be 28V, but the Design is able to handle it. To the sanity Check. I have disconnected the AC Adapter and the load. The MCU was erased. The Battery Voltage is 12V from a PSU The current Consuption is approx. 1mA The BATDRV Voltage is 11.7V The Voltage at the SRN Pin is 12V The VSYS is 11.63V The REGN Voltage is 0.02V The IC was replaced. With friendly regards Mark Rudolph" + }, { + "contentId" : "3324394", + "userName" : "Mark Rudolph", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 2:24 PM", + "userId" : "4215810", + "content" : "Hi Angelo, I have found the problem with the BATFET, the connection to the SRN Pin was broken. So the BATFET is now working fine. (The gate voltage is 17V with a 11V Battery). Now i have the Problem with charging the Battery. The IC tries to charge the battery for a short time (less 1msec), and then stops it (ACFET turns off, and BATFET turns on again) I have attached 3 screenshots Complete Detail At the end With friendly regards Mark Rudolph" + }, { + "contentId" : "3324406", + "userName" : "Mark Rudolph", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 2:28 PM", + "userId" : "4215810", + "content" : "Sorry i forgot my MCU Settings: Charge_Inhibit = 0 ACOC_ThresholdAdj = 0 I_OutSelection = 0 LearnEnable = 0 I_FaultLowSideAdj = 1 I_FaultHiSideAdj = 0 EMI_FreqAdjEnable = 1 EMI_FreqAdj = 0 BAT_DepletionAdj = 0 WatchdogTimerAdj = 0 ACOK_DeglitchTime = 0 Charge Voltage is 12,592V Charge Current = 512mA Input Current Limit is 4A" + }, { + "contentId" : "3324955", + "userName" : "Angelo Zhang87", + "rankPoints" : "6530", + "rankName" : "Expert", + "date" : "Apr 22, 2020 10:25 PM", + "userId" : "5346700", + "content" : "Hi Mark, Thanks for the update regarding the BATFET! I'm glad that's working now. Section 8.4.5 in the datasheet lists the conditions needed to enable or disable charging. Your waveforms and register settings rule out most of these possibilities, but can you please verify ILIM, ACDRV, SRN, and the short circuit conditions? Charge is enabled: yes ILIM pin voltage: ? All three DACs programmed with a valid value: yes ACOK valid: yes ACFET and RBFET turn on and gate voltage is high enough: ? SRN < BATOVP: ? IC temperature < TSHUT: I'm assuming this isn't an issue because the IC only tries to charge the battery for <1 ms before the converter stops switching. Not in ACOC: No, your register settings disable ACOC. Short circuit is detected: ? Watchdog timer expired: No, your register settings disable the watchdog timer. Best regards, Angelo" + } ], + "tags" : [ "/support/power-management/f/196/tags/bq24725A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897593.json b/data/json/DLP/897593.json new file mode 100644 index 0000000000000000000000000000000000000000..de9d9a8c43820b78acc91898479d3bd5f2a7739e --- /dev/null +++ b/data/json/DLP/897593.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "897593", + "reporterName" : "Stefano Vischi", + "rankPoints" : "70", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LP5907-Q1: LP5907 IEC62380 classification", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 20", + "queryText" : "Part Number: LP5907-Q1 Hi all, Can someone please provide me the input parameters necessary for FIT rate calculations based on IEC 62380? for example number of transistors inside the IC, technological structure( MOS? BICMOS?) , lambda3 classification(SO?), etc... device is LP5907QMFX-3.3Q1 to be specific. Thank you in advance! Best regards, Stefano", + "partNumber" : " LP5907-Q1", + "allResponseList" : [ { + "contentId" : "3321985", + "userName" : "Mark Sellers", + "rankPoints" : "4080", + "rankName" : "Expert", + "date" : "Apr 20, 2020 9:24 PM", + "userId" : "4387039", + "content" : "Hi Stefano, Sorry for the slow response. This information comes from a look up table in a reliability handbook. To get the values out of this table we provide them with functional block diagrams so they can look at the basic components that make up the device (op-amp, voltage reference, pass transistor, etc.) and we also provide them with the component count of the design, that breaks down which transistors are included how many of each type etc. Let me know if there is anything else that you want to know about this process. Regards, Mark" + } ], + "tags" : [ "/support/power-management/f/196/tags/LP5907_2D00_Q1", "/support/power-management/f/196/tags/LP5907" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897608.json b/data/json/DLP/897608.json new file mode 100644 index 0000000000000000000000000000000000000000..fea7e8cd103758ba52aea70b5b5be025fb02cefe --- /dev/null +++ b/data/json/DLP/897608.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "897608", + "reporterName" : "Frank Ridder", + "rankPoints" : "180", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ34210-Q1: Fuel gauge takes over 15 minutes to go into relaxation mode", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 33", + "queryText" : "Part Number: BQ34210-Q1 Hallo, I have a BQ34210-Q1 on a custom board with a CC2652R. I'm trying to get the StateOfCharge and StateOfHealth from a battery. But i'm running into an issue when trying to get the initial RRate and RCell. It seems to take more then 15 minutes for the fuel gauge to get into the relaxation mode. I added a screenshot of bqstudio. The manual says that it look at voltage() for 100 seconds but voltage hasn't changed for 15 minutes. I also wait for the Charge Management Controller on the board a MCP73833 to charge the battery to full before sending the EOS_RCELL_RRATE_LEARN subcommand. Is there a way I can make sure the battery get into Relaxation mode? It also seems that LTI bit is set right after I set the EOS_EN bit. How would I be able to prevent this.", + "partNumber" : " BQ34210-Q1", + "allResponseList" : [ { + "contentId" : "3318484", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 16, 2020 7:29 PM", + "userId" : "1864278", + "content" : "Hi Frank, Could you provide your gg file? I would like to check your configurations. Andy" + }, { + "contentId" : "3319154", + "userName" : "Frank Ridder", + "rankPoints" : "180", + "rankName" : "Prodigy", + "date" : "Apr 17, 2020 8:43 AM", + "userId" : "6284274", + "content" : "This is my configuration: settings.gg.csv" + }, { + "contentId" : "3322070", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 20, 2020 11:12 PM", + "userId" : "3528441", + "content" : "Hello Frank, It depends on the battery voltage settle time here to really be in relax mode." + }, { + "contentId" : "3322458", + "userName" : "Frank Ridder", + "rankPoints" : "180", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 7:34 AM", + "userId" : "6284274", + "content" : "Was there anything you could find within the configuration?" + } ], + "tags" : [ "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2bC", "/support/power-management/f/196/tags/CC2652R", "/support/power-management/f/196/tags/BQ34210_2D00_Q1", "/support/power-management/f/196/tags/bqStudio", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2bI2C" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897621.json b/data/json/DLP/897621.json new file mode 100644 index 0000000000000000000000000000000000000000..e02177ad793f24bbc03317920b664060b66222f6 --- /dev/null +++ b/data/json/DLP/897621.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "897621", + "reporterName" : "user5940158", + "rankPoints" : "90", + "resolutionStatus" : "", + "ticketName" : "TPS22965: How does this part function when it is turned off but an ext supply is on?", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 22", + "queryText" : "Part Number: TPS22965 Hello. I'm using the TPS22965 as both a load switch and for isolation when connecting an external supply. The external supply voltages (4 switches) will be 3.3, 2.5, 1.8, and 1.5V. I'm concerned that this part has an internal output load resistor which will consume power (14mA for the 3.3V case).", + "partNumber" : " TPS22965", + "allResponseList" : [ { + "contentId" : "3318322", + "userName" : "Andy Robles", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 16, 2020 5:01 PM", + "userId" : "6043129", + "content" : "Hi, The QOD(Quick Output Discharge) function will only discharge the output of the load switch when the device has been disabled. When the load switch is disabled, it will still have some leakage on the VIN and VBIAS pins of the device. This leakage current is denoted as the shutdown current in the datasheet. The leakage current for VBIAS = 5V was recorded as max 2uA. For VIN = 3.3V you will see a typical leakage current at around 2nA and max 3uA across temperature. The QOD resistor will not consume any power from the input when the device is disabled. Best regards, Andy Robles" + }, { + "contentId" : "3320639", + "userName" : "user5940158", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 2:37 AM", + "userId" : "5940158", + "content" : "Hi,Andy The condition I’m asking about looks like the following. The Load Switch is in the off state and an external 3.3V power supply is on." + }, { + "contentId" : "3321918", + "userName" : "Andy Robles", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 20, 2020 8:19 PM", + "userId" : "6043129", + "content" : "Hi, When the switch is disabled, the QOD resistor will be active and will sink current from the output. Is the QOD a feature that you would need in your application? If the QOD functionality is not needed you can use the TPS22965N which is the same device, but without QOD. A thing to keep in mind is that the TPS22965 does not have reverse current blocking and a voltage VOUT>VIN could potentially damage the device. Best regards, Andy Robles" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS22965" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897623.json b/data/json/DLP/897623.json new file mode 100644 index 0000000000000000000000000000000000000000..13434beec0034f139b90961dcb40b5afbefd6d2a --- /dev/null +++ b/data/json/DLP/897623.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "897623", + "reporterName" : "Stefano Vischi", + "rankPoints" : "70", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS62170-Q1: TPS62170: FIT Rate input parameters", + "rankName" : "Prodigy", + "replies" : " 6", + "views" : " 43", + "queryText" : "Part Number: TPS62170-Q1 Hi all, Can someone please provide me the input parameters necessary for FIT rate calculations based on IEC 62380? for example number of transistors inside the IC, technological structure( MOS? BICMOS?) , lambda3 classification(SO?), etc... device is TPS62170QDSGRQ1 to be specific. Thank you in advance! Best regards, Stefano", + "partNumber" : " TPS62170-Q1", + "allResponseList" : [ { + "contentId" : "3318167", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Apr 16, 2020 3:04 PM", + "userId" : "24596", + "content" : "Stefano, You can get the FIT rate data here: /.../estimator.tsp" + }, { + "contentId" : "3318236", + "userName" : "Stefano Vischi", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 16, 2020 3:43 PM", + "userId" : "4292879", + "content" : "Hi, I have seen FIT estimator that you have suggested but it doesn't consider mission profile and other parameter. We are analysing ASIL level of our board using IEC-62380 and it requires more parameters fro each components. for example number of transistors inside the IC, technological structure( MOS? BICMOS?) , lambda3 classification(SO?), etc... Could you share TPS62170 parameter for IEC-62380? Best regards Stefano" + }, { + "contentId" : "3318247", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Apr 16, 2020 3:48 PM", + "userId" : "24596", + "content" : "Stefano, The information I provided is what we have. I do not personally have anything additional. I will reach out to our quality team and get their feedback. It may take some time under the circumstances." + }, { + "contentId" : "3318747", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Apr 17, 2020 12:49 AM", + "userId" : "24596", + "content" : "Stefano, Usually you would provide an excel or word file for us to complete. Also, we need your company information and end equipment details." + }, { + "contentId" : "3321100", + "userName" : "Stefano Vischi1", + "rankPoints" : "10", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 11:53 AM", + "userId" : "6326047", + "content" : "Design is for a new control unit. It will have a mission profile as you can see in attached file More information are reserved. Thank you Best regards Stefano" + }, { + "contentId" : "3322069", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Apr 20, 2020 11:12 PM", + "userId" : "24596", + "content" : "Stefano, The Quality team is investigating. I'll post when I hear something." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS62170_2D00_Q1", "/support/power-management/f/196/tags/tps62170" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897628.json b/data/json/DLP/897628.json new file mode 100644 index 0000000000000000000000000000000000000000..628547266bd2d8e8c5e150d2c527513b55257f5b --- /dev/null +++ b/data/json/DLP/897628.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "897628", + "reporterName" : "K.Shidara", + "rankPoints" : "2025", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS65130: voltage accuracy inquiry", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 25", + "queryText" : "Part Number: TPS65130 Hi Team, Would you advise my customer's Vout accuracy question. There is voltage accuracy specification below, Is the total accuracy ±3% + divider resistor tolerance correct? What factor is included in Total output accuracy of 3% because Vfbp or Vfbn tolerance is only 2%?", + "partNumber" : " TPS65130", + "allResponseList" : [ { + "contentId" : "3318198", + "userName" : "Aaron Goodson", + "rankPoints" : "5630", + "rankName" : "Expert", + "date" : "Apr 16, 2020 3:20 PM", + "userId" : "4719001", + "content" : "Hi, I have notified our expert regarding this topic. Please expect a response by 4/21/20. Thanks, Aaron" + }, { + "contentId" : "3321987", + "userName" : "Liaqat Khan", + "rankPoints" : "7780", + "rankName" : "Expert", + "date" : "Apr 20, 2020 9:26 PM", + "userId" : "291526", + "content" : "Hello, Correct, total accuracy is +/-3% + divider resistor tolerance. Total accuracy of 3% consists of 2% for VFBP/VFBN + 1% for Vref. Kind Regards, Liaqat" + }, { + "contentId" : "3322085", + "userName" : "K.Shidara", + "rankPoints" : "2025", + "rankName" : "Intellectual", + "date" : "Apr 20, 2020 11:41 PM", + "userId" : "377610", + "content" : "Hi Liaqat-san Thank you so much for your answer. Best regards, Shidara" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS65130" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897644.json b/data/json/DLP/897644.json new file mode 100644 index 0000000000000000000000000000000000000000..9910af95ac695d11ff8fd807ce9c61ed3e15e969 --- /dev/null +++ b/data/json/DLP/897644.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "897644", + "reporterName" : "user5767499", + "rankPoints" : "40", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS25982: doesn't power up with load", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 54", + "queryText" : "Part Number: TPS25982 Hello, I have problem with TPS259827LNRGET. It doesn't power up with any load current, even small like 1A (still retries, NRETRY connected to GND), but there is no problem with powering up without load (which can be applied after). Vin is 24V and max current is 6.5A (about 1A during powering up), load capacitance 100-200 uF. More details: LDSTR connected to GND, EN pulled up to external 3V3 with 10kOhm resistor, retry_dly cap 2n2, Rilim 191R, Rimon 1k69, Cdvdt 2n2, Citimer 4n7, PG puled up to external 3V3 via 100kOhm. The question is, what is wrong? I was using your dedicated calculator, but I still don't understand why it doesn't work.", + "partNumber" : " TPS25982", + "allResponseList" : [ { + "contentId" : "3318962", + "userName" : "Praveen GD", + "rankPoints" : "9575", + "rankName" : "Genius", + "date" : "Apr 17, 2020 5:26 AM", + "userId" : "4421098", + "content" : "Hi, The maximum recommended operating voltage of TPS25982 is 24V. We don't recommend using this device for 24V nominal voltage as the maximum input voltage can be > 24V. Can you please share the design calculator with your design parameters filled in and your schematic for review." + }, { + "contentId" : "3319943", + "userName" : "user5767499", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 17, 2020 8:02 PM", + "userId" : "5767499", + "content" : "Hi Praveen, Schematic is following: Where RmaxCurrent is ~250R (270R probably) and Rimon is 2k2. For Cdvdt = 2n2 fuse powers up with max 0.8 A current load. It's not enough. In the table on p.9 in datasheet margins are wider. In the excel file I'm setting 10R load at start-up. Anyway, I minimized dvdt time (removed C150) and here we have another problem. As you can see, I'm trying to control EN line from MCU. When I'm setting low state (connecting to GND) on this pin during efuse operation with some load, after reset try, it destabilizes and falls into infinite reset cycles. I'm getting voltage on the output only if I turn off the load. Here is efuse power up with no load (blue - EN pin, pink - output voltage): I thought the problem can be with the external 3V3 source (it's coming from DC converter which is powering from 12V, which in turn come from 24V). I've noticed that if I turn off 24V power supply and turn it on fast enough (so supply on EN pin won't fall under ~1.2V) efuse will power up with load. Below is oscillogram. Second channel div is 1 V (EN pin) and third one 10 V (output voltage). First rising edge is the first PCB start-up - fuse is resetting all the time. I'm turning the power supply off and turning it on fast - fuse works fine. The third rising edge shows the situation when I let 3V3 on EN pin fall too much - efuse is resetting again. It doesn't make any sense - how EN function suppose to work if I can't set low state on this pin (<1V2)? PG pin works correctly - high state if fuse power up and low if not (reset cycles). I was trying also to use a voltage divider instead of using external 3V3. According to your eval board schematic it looked following: I've changed R2 to 60k, so EN voltage was ~1.35V. When I was switching line to GND to reset fuse, it didn't power up correctly and was resetting infinitely, again. Still under the load of course. While fuse is resetting we can observe voltage peaks on IMON pin (current load 2.9A, Rimon 2k2): What is wrong here and how can I solve this problem? I've attached excel file. Regards, Margo" + }, { + "contentId" : "3321424", + "userName" : "Praveen GD", + "rankPoints" : "9575", + "rankName" : "Genius", + "date" : "Apr 20, 2020 3:00 PM", + "userId" : "4421098", + "content" : "Hi Margo, It is possible that the device TPS259827L does not start with load when you are operating at 24V. This is because of the following reasons, As the input voltage is high, the power dissipation across the FET will be high for smaller current as well. The total current in the efuse will be sum of load current + current flowing into the output capacitors. As you can see in cell D7 of the attached design calculator, the design will not have a succeful startup with 24V and 10 ohms load during startup and 2.2nF dvdt cap. 8053.TPS25982xx_Design_Calculator_RevA.xlsm The design calculator takes into consideration the 'Time to Thermal Shutdown vs Power dissipation' curve/data which is taken on the device EVM. The EVM can have different RQJA when compared to your system and most probably the RQJA on your system would be less than that of the EVM. In this case, the device will take even less time to hit thermal shutdown and hence will support less load current than what the design calculator suggests. As I mentioned earlier, this device is not suitable for operating at 24V nominal voltage. As your system specs are 24V and 6A, you can consider using TPS2663. The TPS2663x devices are easy to use, positive 60 V and 6-A eFuse with a 31-mΩ integrated FET Product Folder: /product/TPS2663" + }, { + "contentId" : "3325536", + "userName" : "Praveen GD", + "rankPoints" : "9575", + "rankName" : "Genius", + "date" : "Apr 23, 2020 11:40 AM", + "userId" : "4421098", + "content" : "Hi Margo, Hope your questions are answered. In case you do not have any other questions, can we close this thread ?" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS25982" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897648.json b/data/json/DLP/897648.json new file mode 100644 index 0000000000000000000000000000000000000000..f8ed6aea3ea54ce95d2d1e4f7ad2835681cdb7ac --- /dev/null +++ b/data/json/DLP/897648.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "897648", + "reporterName" : "Jamie Tseng", + "rankPoints" : "1290", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ24617: How to avoid entering sleep mode when using 5V adapter?", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 18", + "queryText" : "Part Number: BQ24617 Hi Teams, My customer applies BQ24617 in their project. The use case is Lithium battery 1S3P with charge voltage 4.35V/ charge current 3A. They have two kinds of input voltage,12VIN and 5VIN. When Vin=12V, everything goes well. But when Vin=5V, the BQ24617 stop charging until the battery is discharged. We know that BQ2461X series Vcc must be at least 500mV higher than SRN to avoid entering sleep mode. Due to the customer must have 5V and 12V input voltage in their application, do you have any suggestions to solve this problem? If BQ24617 cannot meet this requirement, could you kindly recommend a suitable device for this application? Thanks and best regards, Jamie", + "partNumber" : " BQ24617", + "allResponseList" : [ { + "contentId" : "3318332", + "userName" : "Kedar Manishankar", + "rankPoints" : "9290", + "rankName" : "Genius", + "date" : "Apr 16, 2020 5:16 PM", + "userId" : "4996925", + "content" : "Hi Jamie, As BQ24617 is a charge controller, customer has more flexibility in choosing external components as well as layout. It is critical to minimize trace length (impedance) between adapter plug in and VCC of the IC, and to account for voltage drop across the input reverse blocking FETs (minimize RDSon of these PFETs). When monitoring for SLEEP mode, measure VCC and SRN as close to IC as possible. If you are looking for standalone part you can take a look at BQ25606 as well which is more integrated." + }, { + "contentId" : "3319705", + "userName" : "Jamie Tseng", + "rankPoints" : "1290", + "rankName" : "Intellectual", + "date" : "Apr 17, 2020 4:07 PM", + "userId" : "5839773", + "content" : "Hi Kedar, I'll send you the layout file and schematic privately, could you kindly help on how to improve the voltage drop and let the device not to enter sleep mode when 5VIN? Thanks and best regards, Jamie" + }, { + "contentId" : "3329053", + "userName" : "Kedar Manishankar", + "rankPoints" : "9290", + "rankName" : "Genius", + "date" : "Apr 27, 2020 3:46 PM", + "userId" : "4996925", + "content" : "Thread resolved offline." + } ], + "tags" : [ "/support/power-management/f/196/tags/bq24617" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897674.json b/data/json/DLP/897674.json new file mode 100644 index 0000000000000000000000000000000000000000..2b3c286b6d7f09c909f2c40fd85103d25582b3c1 --- /dev/null +++ b/data/json/DLP/897674.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "897674", + "reporterName" : "Kai Yang1", + "rankPoints" : "700", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "IWR6843ISK: Mounting structure for sensor and camera", + "rankName" : "Intellectual", + "replies" : " 5", + "views" : " 35", + "queryText" : "Part Number: IWR6843ISK Hi In the lab of Sense and Direct HVAC Control with IWR68xx, you overlay the radar sensor data together with the camera data. I was wondering if you could recommend a mounting structure that is able to hold the sensor and camera at the same time. Thanks! Kai", + "partNumber" : " IWR6843ISK", + "allResponseList" : [ { + "contentId" : "3318438", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 16, 2020 6:53 PM", + "userId" : "5118664", + "content" : "Hi Kai, Typically you can find a tripod mount that will hold both the camera and the EVM. Regards, Justin" + }, { + "contentId" : "3318486", + "userName" : "Kai Yang1", + "rankPoints" : "700", + "rankName" : "Intellectual", + "date" : "Apr 16, 2020 7:30 PM", + "userId" : "6235993", + "content" : "Hi Justin Thanks for your quick reply! The tripod mount I found can only hold one object, the sensor or camera. Any links on the mount that can hold both? Thanks! Kai" + }, { + "contentId" : "3319860", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 17, 2020 6:16 PM", + "userId" : "5118664", + "content" : "Hi Kai, Something like this will work fine: https://www.amazon.com/Neewer-20-3cm-Bracket-Stereoscopic-Photography/dp/B00PAG93ES Regards, Justin" + }, { + "contentId" : "3327541", + "userName" : "Kai Yang1", + "rankPoints" : "700", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 8:59 PM", + "userId" : "6235993", + "content" : "Hi Justin Have you ever overlay the sensor output with the camera image in the same plot? If so, how did you calibrate the extrinsic parameters? Thanks! Kai" + }, { + "contentId" : "3329022", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 3:31 PM", + "userId" : "5118664", + "content" : "Hi Kai, I haven't done this - I am closing the thread as this is off topic. Regards, Justin" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR6843ISK" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897683.json b/data/json/DLP/897683.json new file mode 100644 index 0000000000000000000000000000000000000000..2ce2ad9801fedc75983154bfee424ae2bfcce380 --- /dev/null +++ b/data/json/DLP/897683.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "897683", + "reporterName" : "George Denove", + "rankPoints" : "180", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "AWR1642BOOST: Code Division Multiplexing? // MIMO Network where transmitters are not colocated.", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 41", + "queryText" : "Part Number: AWR1642BOOST Hi, I have two AWR1642 sensors located in two different places throughout the environment. I am trying to figure out a way to have them both transmit at the same time and allow each of the other radars in the network collect their transmissions as well. With the hardware provided in the AWR, how do you recommend completing this? Is a code division multiplexing strategy feasible? Here are the avenues I have tried out so far: Shift the frequency bands for each node/AWR transmitter, but an AWR can only transmit one band of frequency at once. (Therefore, it cannot transit a second band for the IF signal to be realized.) Do a Binary Phase Shift Keying, but there is not a phase changer (per the block diagram below from your website) before the signal is transmitted. Also, how would one differentiate node 1's BPM signal on node 2 if the distance (therefore, phase of the incoming received wave) is not known. Therefore, I am wondering if there is another way to do this with the hardware provided on an AWR1642. CDM? Thank you! George", + "partNumber" : " AWR1642BOOST", + "allResponseList" : [ { + "contentId" : "3318959", + "userName" : "Jitendra Gupta", + "rankPoints" : "33995", + "rankName" : "Mastermind", + "date" : "Apr 17, 2020 5:25 AM", + "userId" : "1717369", + "content" : "Hello George, If both of AWR1642 are at a reachable distance then frame can be trigger using hardware trigger mode. In this case, one device can drive GPIO pulse which is connected to itself on AR_SYNC_IN line and on the same line of other AWR1642. This way both devices transmit frames at the same time (considering other device get GPIO pulse at same time as first device). Regards, Jitendra" + }, { + "contentId" : "3319397", + "userName" : "George Denove", + "rankPoints" : "180", + "rankName" : "Prodigy", + "date" : "Apr 17, 2020 1:04 PM", + "userId" : "6164448", + "content" : "Hi Jitendra, Thank you so much for getting back to me with all your answers. As of right now, I have implemented what you described above. My question, though, is about interference avoidance in this hardware (or even one day hopefully, software) synchronized setting. Say I have 3 radars in a network. Right now, only Radar 1 transmits, while Radar 2 and Radar 3 receive the reflected Radar 1 signal. Now I want to implement a system where two radars transmit and receive all signals. So Radar 1 and Radar 2 transmit, and all three Radars collect their transmitted signal, mix, process, etc. I am doing the processing offline so no need to consider the onboard DSP chain. Here is the issue I am running into. If two hardware triggered AWR1642's trigger at once and we want to use their spatial differences in a multistatic mode (mode described above), we need a way to do interference avoidance. As described in more detail in original post, I tried BPM (Radar 1 transmits at 0 degrees and Radar 2 transmits at 180 degrees) and shifting the frequency bands (radar 1 transmits a band of 77GHz-79 GHz and radar 2 transmits at 79-81GHz), but because there is only one synthesizer and no phase changers on the AWR, I am unsure these two avenues will work (since each radar will need to mix the differing received signals on their device to get an IF signal). Do you have any other recommendations on how to accomplish interference avoidance while also being able to receive the bistatic signal from the other radars in the network? Thank you very much Jitendra, and I look forward to hearing back from you! George" + }, { + "contentId" : "3328472", + "userName" : "Anil Mani", + "rankPoints" : "4490", + "rankName" : "Expert", + "date" : "Apr 27, 2020 8:11 AM", + "userId" : "1173207", + "content" : "Hi George, There is no way to acheive proper bi-static operation with AWR1642. If one AWR1642 receives reflected signals generated from another AWR1642, the 'phase noise/chirp linearity' performance of the radar is degraded drastically. The one caveat to the above statement is the method of cascading radars where one chip (called the master) provides the rest of the devices (called slaves) with the 20 Ghz synthesizer signal. In this mode, both master and slave are generating near identical chirps, and so every radar in a cascaded setup will be able to recieve and 'mix down correctly' signals transmitted by other radars. That being said, the only available solution to solving the problem of interference for your problem is BPM. BPM is simply a phase change on the RF signal (not a frequency change) so the mixers will be able to down convert the signal without issue. Then using the ADC data, you should be able to separate the signals from different devices. In fact, note that AWR1642 has itself 2 transmitters with independent BPM controls, so you should be able to do the BPM test using one device with two transmitters transmitting simultaneously. Regards Anil" + } ], + "tags" : [ "/support/sensors/f/1023/tags/AWR1642", "/support/sensors/f/1023/tags/mimo", "/support/sensors/f/1023/tags/AWR1642BOOST", "/support/sensors/f/1023/tags/awr20_5F00_a_5F00_hwa20_5F00_boost", "/support/sensors/f/1023/tags/Code%2bdivision%2bmultiplexing" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897698.json b/data/json/DLP/897698.json new file mode 100644 index 0000000000000000000000000000000000000000..2ce382dbc584e7cd791af48ab84aebc24fea72e1 --- /dev/null +++ b/data/json/DLP/897698.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "897698", + "reporterName" : "Arnaud Martin", + "rankPoints" : "30", + "resolutionStatus" : "", + "ticketName" : "LM2585: SPICE MODEL", + "rankName" : "Prodigy", + "replies" : " 5", + "views" : " 27", + "queryText" : "Part Number: LM2585 Hello, I search a spice model for LM2585 to simulate it with a software for a project. Thank you by advance for your help, Have a good day,", + "partNumber" : " LM2585", + "allResponseList" : [ { + "contentId" : "3319720", + "userName" : "Youhao Xi", + "rankPoints" : "39085", + "rankName" : "Mastermind", + "date" : "Apr 17, 2020 4:18 PM", + "userId" : "1880260", + "content" : "Hi Arnaud, Thank you for your interest in LM2585. Sorry the spice model is currently not available. Can you use Webench for simulation? Thanks, Youhao Xi, Applications Engineering" + }, { + "contentId" : "3325069", + "userName" : "Zack Liu", + "rankPoints" : "12485", + "rankName" : "Genius", + "date" : "Apr 23, 2020 1:31 AM", + "userId" : "4961181", + "content" : "Hi Arnaud, Does the WEBECN simulation help?" + }, { + "contentId" : "3325260", + "userName" : "Arnaud Martin", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 5:52 AM", + "userId" : "4175125", + "content" : "Hi Youhao, I try Webench, but in my project i need integrate a spice model to the software. Have you got a another regulator equivalent which have a spice model ? Thank you for your help. Arnaud MARTIN" + }, { + "contentId" : "3325263", + "userName" : "Arnaud Martin", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 5:54 AM", + "userId" : "4175125", + "content" : "Hi Zack, No the webench don't resolved my problem of simulation. Have a good day. Arnaud MARTIN" + }, { + "contentId" : "3325493", + "userName" : "Zack Liu", + "rankPoints" : "12485", + "rankName" : "Genius", + "date" : "Apr 23, 2020 10:35 AM", + "userId" : "4961181", + "content" : "Hi Arnaud, Could you share the working conditions of your application, such as Vin range, Vout, Iout, Fsw? Maybe I can find you another boost converter which has SPICE model available on ." + } ], + "tags" : [ "/support/power-management/f/196/tags/LM2585" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897702.json b/data/json/DLP/897702.json new file mode 100644 index 0000000000000000000000000000000000000000..63c4060ff3ebe5c5f00ac68b7eba668c26e8efa9 --- /dev/null +++ b/data/json/DLP/897702.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "897702", + "reporterName" : "NITESH FUNDE", + "rankPoints" : "20", + "resolutionStatus" : "", + "ticketName" : "BQ24210: Energy Harvesting from 3Watt solar panel in Li-Ion Battery", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 38", + "queryText" : "Part Number: BQ24210 BQ24210 has not MPPT algorithm and BQ25570 can not support for more than 500mW power. How we claim how much efficiency of BQ24210 without MPPT. I want to charge Li-Ion battery from 3Watt solar panel. Which one IC is better for that.", + "partNumber" : " BQ24210", + "allResponseList" : [ { + "contentId" : "3318703", + "userName" : "Nick Brylski", + "rankPoints" : "340", + "rankName" : "Prodigy", + "date" : "Apr 16, 2020 11:35 PM", + "userId" : "5338371", + "content" : "Hi Nitesh, A few questions: What charging current does battery need? Is it a single cell li-ion? What is voltage range of the solar panel you selected? BQ24210 has max voltage of 20V but operating range is 3.5V - 7V. What efficiency do you want to achieve? Linear chargers like BQ24210 have significantly lower efficiency than a switching charger like BQ25570 Best," + }, { + "contentId" : "3320251", + "userName" : "NITESH FUNDE", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 18, 2020 10:52 AM", + "userId" : "5272665", + "content" : "Hi Nick, What charging current does battery need? Is it a single cell li-ion? :- Yes, it is Li-Ion single cell battery charger. Maximum charger battery current is 800mA. What is voltage range of the solar panel you selected? BQ24210 has max voltage of 20V but operating range is 3.5V - 7V. :- Solar panel voltage range is 6V to 12V. What efficiency do you want to achieve? Linear chargers like BQ24210 have significantly lower efficiency than a switching charger like BQ25570 :- I want to achieve minimum 89% efficiency at 800mA (Maximum load) and more than 90% efficiency is better for us. Best Regards, Nitesh Funde, Electronics Engineer, TE Connectivity India Pvt. Ltd., Bangalore." + }, { + "contentId" : "3324564", + "userName" : "Nick Brylski", + "rankPoints" : "340", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 3:48 PM", + "userId" : "5338371", + "content" : "Hi Nitesh, Take a look at BQ24650 (standalone) with integrated MPPT or BQ25895 (i2c) with the following reference design /lit/ug/tidudj2/tidudj2.pdf BQ25570 has a boost topology to charge the battery, hence for solar input BQ25570 wouldn’t work at all. Best," + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24210", "/support/power-management/f/196/tags/BQ25570" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897711.json b/data/json/DLP/897711.json new file mode 100644 index 0000000000000000000000000000000000000000..b94dac0562879d1264cb1fc8142311d03cd00f20 --- /dev/null +++ b/data/json/DLP/897711.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "897711", + "reporterName" : "matilde maria pavese", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS61096A: netlist", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 15", + "queryText" : "Part Number: TPS61096A Good Morning, would it be possible to have the netlist for this component to simulate it in ltspice? thank you. Matilde", + "partNumber" : " TPS61096A", + "allResponseList" : [ { + "contentId" : "3318911", + "userName" : "Minqiu Xie", + "rankPoints" : "12515", + "rankName" : "Genius", + "date" : "Apr 17, 2020 3:54 AM", + "userId" : "5303427", + "content" : "Hi Matilde: To simulate in LTspice, it need uncrypted model, which is not pubilic yet. May you share email with me? So that I can touch you and check if it's available." + }, { + "contentId" : "3319554", + "userName" : "matilde maria pavese", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 17, 2020 2:40 PM", + "userId" : "6326246", + "content" : "Hi Mingiu, matildemaria.pavese@studenti.polito.it is my email Hope to hear back from you soon, Matilde" + }, { + "contentId" : "3322187", + "userName" : "Minqiu Xie", + "rankPoints" : "12515", + "rankName" : "Genius", + "date" : "Apr 21, 2020 2:07 AM", + "userId" : "5303427", + "content" : "Hi Matilde: As I catched you via email, please allow me close this post. Thanks for your kind understanding." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS61096A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897714.json b/data/json/DLP/897714.json new file mode 100644 index 0000000000000000000000000000000000000000..0de26467c0da21ea76b11b4a386bbbdefdd056e3 --- /dev/null +++ b/data/json/DLP/897714.json @@ -0,0 +1,71 @@ +{ + "ticketNumber" : "897714", + "reporterName" : "micou ludovic", + "rankPoints" : "840", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ34Z100-G1: Configuration with a heating mat before discharge in low temperature", + "rankName" : "Intellectual", + "replies" : " 7", + "views" : " 31", + "queryText" : "Part Number: BQ34Z100-G1 Hello, I have to set up a battery that will be more on a constant power. the battery will run from -30°C to 60°C, at -30°C, there is a heating mat that will be activated for 1 hour. For GCPB learning, should heating be used or not? Which mode load mode and load select it to use knowing that I want to read the remaining energy? I can convert the capacity into energy by multiplying it by the voltage but would I have a good result? What error of imprecision should I expect following what you will recommend to me? Tanks, Best Regards Micou", + "partNumber" : " BQ34Z100-G1", + "allResponseList" : [ { + "contentId" : "3318534", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 16, 2020 8:22 PM", + "userId" : "1864278", + "content" : "Hi Micou, What do you mean by GCPB learning? Are you talking about this /tool/GPCRB tool? Andy" + }, { + "contentId" : "3319023", + "userName" : "micou ludovic", + "rankPoints" : "840", + "rankName" : "Intellectual", + "date" : "Apr 17, 2020 6:37 AM", + "userId" : "1920336", + "content" : "Hi Andy, Yes this is the GPCRB. Micou" + }, { + "contentId" : "3319819", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 17, 2020 5:34 PM", + "userId" : "1864278", + "content" : "Hi Micou, -30C is very challenging for most batteries. I would suggest you check the performance of these batteries -30C first. Usually, most batteries can have little useable capacity at that low temperature. In addition, the test procedure mentioned in the GPCRB instruction manual requires that the low temperature of your choice should be constant. You should follow the test procedure, whether you use the heating mat or not. Andy" + }, { + "contentId" : "3320955", + "userName" : "micou ludovic", + "rankPoints" : "840", + "rankName" : "Intellectual", + "date" : "Apr 20, 2020 9:00 AM", + "userId" : "1920336", + "content" : "Hi Andy, Thanks for your response. What is the behaviour if the temperature is negative and the battery is heated by a heating cloth before having a discharge? I want to know the remaining energy, what is the best mode to use to do it? the battery has a li-ion chemistry in 7S or 27V with 20Ah. Best Regards, Micou" + }, { + "contentId" : "3321699", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 5:27 PM", + "userId" : "1864278", + "content" : "Hi Micou, What is the behaviour if the temperature is negative and the battery is heated by a heating cloth before having a discharge? [Andy] The gauge device provides SOC production base on the temperature, voltage, and current measurements. It still works in this case. I would suggest you do your own experiment to check the SOC accuracy by yourself.' I want to know the remaining energy, what is the best mode to use to do it? the battery has a li-ion chemistry in 7S or 27V with 20Ah. [Andy] What do you mean by \"best mode\"? Andy Andy" + }, { + "contentId" : "3322632", + "userName" : "micou ludovic", + "rankPoints" : "840", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 10:35 AM", + "userId" : "1920336", + "content" : "Hi Andy, I want to have the remaining energy, but I have a microcontroller that can calculate the proportion of voltage by remaining capacity. is it better to use current model or constant-power model for the Load mode? And what is the Load select value can I use? I have a power that is not identical to every cycle. Thanks, Best Regards. Micou" + }, { + "contentId" : "3323098", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 3:50 PM", + "userId" : "1864278", + "content" : "Hi Micou, I would suggest you select a Load Mode that is closer to your application. I guess you may want to start with Load Mode = 1 (Constant Power) and Load Select (default). Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/heating%2bmat", "/support/power-management/f/196/tags/BQ34Z100_2D00_G1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897735.json b/data/json/DLP/897735.json new file mode 100644 index 0000000000000000000000000000000000000000..6d0fa0f2e08ffbda1fe2180249f8c22e3c663e68 --- /dev/null +++ b/data/json/DLP/897735.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "897735", + "reporterName" : "Carlo Cabaccan", + "rankPoints" : "2530", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "Gate driver for Cuk Converter", + "rankName" : "Intellectual", + "replies" : " 4", + "views" : " 31", + "queryText" : "Hi team, Good day. Our customer is looking for a gate driver with spice model available to be used for Cuk Converter. Here are the requirements: Vcc = 30 to 60V Channels = 1 Switch Type = MOSFET Driver Topology = Low side Output = 1kW, 45V I have checked our product list, however, it seems that the maximum input supply of our gate drivers is up to 40V only. Looking into our reference designs for Cuk Converter, supply is within 40V only. /tool/PMP30487 /tool/PMP8639 Do you have any recommendations for this? Thank you in advance for your help. Regards, Carlo", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3318684", + "userName" : "Don Dapkus", + "rankPoints" : "174575", + "rankName" : "Guru", + "date" : "Apr 16, 2020 11:03 PM", + "userId" : "1027", + "content" : "Hi, Carlo, The parts used in the PMPs you referenced aren't gate drivers, they are controllers made by a different group. Let me re-assign your post to that group for comment." + }, { + "contentId" : "3318776", + "userName" : "Youhao Xi", + "rankPoints" : "39085", + "rankName" : "Mastermind", + "date" : "Apr 17, 2020 1:36 AM", + "userId" : "1880260", + "content" : "Hi Carlo. 1kW sounds excessive for a Cuk converter. Anyway, most of our boost controllers can implement a Cuk. However, this 1kW makes our controlles' internal drive insufficient. You should employ an external driver, either consisting of discrete driver like two FETs in totem pole, or a driver IC like the LM51xx type, along with our boost controllers like the LM5155 for the PWM control. Hope this clarifies. Thanks, Youhao Xi, Applications Engineering" + }, { + "contentId" : "3323010", + "userName" : "Carlo Cabaccan", + "rankPoints" : "2530", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 3:07 PM", + "userId" : "5915269", + "content" : "Hi Youhao, From my understanding, since the LM5155 has an internal PWM, does it mean that I don't need to set a PWM to drive the gate while using this IC? Regards, Carlo" + }, { + "contentId" : "3323311", + "userName" : "Youhao Xi", + "rankPoints" : "39085", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 6:51 PM", + "userId" : "1880260", + "content" : "Hi Carlo, If I understand you correctly: The LM5155 will handle the PWM, and you need to use the GATE pin signal of the LM5155 as the input signal to your external driver. Thanks, Youhao" + } ], + "tags" : [ "/support/power-management/f/196/tags/PMP30487", "/support/power-management/f/196/tags/PMP8639" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897746.json b/data/json/DLP/897746.json new file mode 100644 index 0000000000000000000000000000000000000000..9e45b479ffd58bf1fd59300227b5d22038979979 --- /dev/null +++ b/data/json/DLP/897746.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "897746", + "reporterName" : "Jeremy Heath1", + "rankPoints" : "40", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ34110EVM-796: Current sense is inverted, discharging sets the BatteryStatus.CHG bit.", + "rankName" : "Prodigy", + "replies" : " 6", + "views" : " 28", + "queryText" : "Part Number: BQ34110EVM-796 The current sensing polarity is inverted. Charging is Negative current and Discharging is positive current. I have battery and load (resistor) connected as in Figure 1 of the bq34110EVM Quick Start Guide. I replaced the bq34111 IC. During charging the BQ34110 [DSG] flag is set and the gauge indicates a negative current in bqStudio 1.3.86. Similarly to charging, discharging incorrectly causes the [CHG] flag to set. When I apply a 350mA load for calibration, specifying -350 mA applied current results in the gauge adjusting to +350 mA. I do believe I initially set current Positive during calibration, but now when I do calibration with a negative current (and discharging), it will not return to normal. I have tried re-flashing firmware (bq34110_v0_02_build_9.srec) twice; no change.", + "partNumber" : " BQ34110EVM-796", + "allResponseList" : [ { + "contentId" : "3319616", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 17, 2020 3:17 PM", + "userId" : "1864278", + "content" : "Hi Jeremy, Are you using a bq34110 EVM? If not, make sure the sense resistor on your board has the correct connection. Also, follow the instructions in the EVM user's guide to do the calibration. Andy" + }, { + "contentId" : "3319628", + "userName" : "Jeremy Heath1", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 17, 2020 3:22 PM", + "userId" : "6253712", + "content" : "Yes. Using the b134110 EVM. No changes made to the sense resistor. Yes. Have successfully completed the calibration and it has not resolved my issue." + }, { + "contentId" : "3319975", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 17, 2020 8:36 PM", + "userId" : "1864278", + "content" : "Hi Jeremy, I have checked my EVM and not seen that issue. This EVM has been used by quite a few customers and I have not heard the same issue. Please follow the instructions in the EVM user's guide and make sure all the connections are correct. Andy" + }, { + "contentId" : "3321517", + "userName" : "Jeremy Heath1", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 3:47 PM", + "userId" : "6253712", + "content" : "I found this to be the same as I am experiencing. /support/power-management/f/196/t/654601?tisearch=e2e-sitesearch&keymatch=BQ34110EVM-796 1. Replaced a broken bq34110 2. Used incorrect polarity for initial Calibrations. 3. Charge/Discharge indicators are incorrect. 4.company could not help resolve the problem. The post states that the EV board or bq34110 was replaced. Is thatcompany recommendation? connected according to Fig 1 of the bq34110EVM Quick Start Guide" + }, { + "contentId" : "3323527", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 10:26 PM", + "userId" : "1864278", + "content" : "I would suggest trying another new bq34110 device. Don't download the firmware or do the calibration. Just check the discharge current or charge current and see if they make sense. Andy" + }, { + "contentId" : "3326164", + "userName" : "Jeremy Heath1", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 7:19 PM", + "userId" : "6253712", + "content" : "Same setup for battery/power supply with resistor as a load. A new bq34110 registers a negative current as a discharge. Charging is a positive current. So the conclusion is that when doing the Calibration, use a Negative current or else it won't be correctable. A ROM firmware load does not correct this either. The only option in this case was to replace the bq34110 part." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ34110", "/support/power-management/f/196/tags/BQ34110EVM_2D00_796", "/support/power-management/f/196/tags/bqStudio" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897752.json b/data/json/DLP/897752.json new file mode 100644 index 0000000000000000000000000000000000000000..b940304ceab055c6018aa08435d2abd7e5a3f089 --- /dev/null +++ b/data/json/DLP/897752.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "897752", + "reporterName" : "B. Thunderbolt", + "rankPoints" : "90", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ20Z655-R1: DSG FET Drive Problem", + "rankName" : "Prodigy", + "replies" : " 6", + "views" : " 75", + "queryText" : "Part Number: BQ20Z655-R1 Hi, I made a battery pack that has Li-Ion cells. When the cells are nominal voltage level, I measured 4.5VDC (reference point is BAT+) at gate of DSG FET. During discharge, this drive voltage goes through lower voltage levels. But voltage of CHG drive pin is always 10.58VDC (reference point is PACK+). First, I susptected from IC. Maybe IC's charge pump has problem, I can change and try it to measure again. But still the same problem. After that I susptected from capacitors that feeds charge pump circuit. Measured with LCR meter. Values are OK. By the way, I removed reverse protection and pre-charge circuit. Maybe they are cause of this. But anything did not change. My questions are, Does IC have independent charge pump for DSG and CHG pins? If yes, so I think I need to change again, maybe it is victim of ESD. If no, I need to change my FET. 2.Can you tell me please which capacitor is helping to voltage rise from drive pins? So maybe I can try different capacitances at there. Thank you. Best regards.", + "partNumber" : " BQ20Z655-R1", + "allResponseList" : [ { + "contentId" : "3320063", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 17, 2020 10:32 PM", + "userId" : "1864278", + "content" : "I have assigned your question to my colleague and he will get back to you later. Andy" + }, { + "contentId" : "3321967", + "userName" : "Dominik Hartl11", + "rankPoints" : "35875", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 9:05 PM", + "userId" : "9849", + "content" : "Can you share your schematics? The DSG FET gate drive is approx. 12V." + }, { + "contentId" : "3322035", + "userName" : "Eric Vos24", + "rankPoints" : "3585", + "rankName" : "Expert", + "date" : "Apr 20, 2020 10:22 PM", + "userId" : "3440231", + "content" : "Hello, 1) yes there are separate drivers for the CHG and Dsg pins. The Firmware will disable the FETS do to safety events are you sure you have not triggered a reason for the Dsg FET to be off? Thanks, Eric Vos" + }, { + "contentId" : "3322699", + "userName" : "B. Thunderbolt", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 12:19 PM", + "userId" : "5616860", + "content" : "Hi, I checked from software. IC is driving CHG and DSG pins. You can see my DSG FET drive SCH." + }, { + "contentId" : "3327620", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 24, 2020 10:09 PM", + "userId" : "3528441", + "content" : "CHG and DSG will drive the FETs in this chip." + }, { + "contentId" : "3327712", + "userName" : "B. Thunderbolt", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 25, 2020 12:57 AM", + "userId" : "5616860", + "content" : "I have finaly solved my problem. Problem occured from my schematic. When I edited the SCH for the BoM, I changed the value of IC's PACK pin current limiter resistor value 1k to 100k. So this mistake helps me to understand how to DSG pin work. IC has independent FET drive circuits. This means every circuit can be supply from other pins. I think, this is why I see very normal voltage between CHG and source of CHG FET. Using 100k instead of 1k for PACK pin occurs low current supply for DSG pin drive circuit. Therefore I couldn't see the normal voltage value of DSG pin. This little mistake made unimaginable problems. Thank you for your kindly interest." + } ], + "tags" : [ "/support/power-management/f/196/tags/bq20z655_2D00_r1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897766.json b/data/json/DLP/897766.json new file mode 100644 index 0000000000000000000000000000000000000000..b32d1c9f0c9fd8149fa8ec2aae815794a61a0b44 --- /dev/null +++ b/data/json/DLP/897766.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "897766", + "reporterName" : "JH Shin", + "rankPoints" : "50", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS24710: Request a design review", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 31", + "queryText" : "Part Number: TPS24710 Hello, Please review the attacted TPS24710 design files. Thanks a lot.tps24710.zip", + "partNumber" : " TPS24710", + "allResponseList" : [ { + "contentId" : "3318955", + "userName" : "Praveen GD", + "rankPoints" : "9575", + "rankName" : "Genius", + "date" : "Apr 17, 2020 5:19 AM", + "userId" : "4421098", + "content" : "Hi Shin, Thanks for sharing the design files for review. I will come back with my review comments before coming Monday." + }, { + "contentId" : "3323549", + "userName" : "JH Shin", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 11:13 PM", + "userId" : "6311800", + "content" : "Hi Praveen, Thanks for your help. Are there any updates ? I'm still waiting for your reply. Regards, JH" + }, { + "contentId" : "3324459", + "userName" : "Praveen GD", + "rankPoints" : "9575", + "rankName" : "Genius", + "date" : "Apr 22, 2020 2:57 PM", + "userId" : "4421098", + "content" : "Hi JH, Attached is the updated design calculator. Please see my comments below, Copy of Copy of TPS24710_Design_Calculator_REV_E.xlsx The schematic seems to have 4 mOhms of sense resistor but the design calculator has 3 mohms entered. I have taken 3 mohms into consideration. The Power limit resistance values are different from the design calculator and Schematic. Make sure the timer value is > Target Timer (1.5x typical) I don't see Schottky diode at the output of Hotswap Controller. You may be required to use one to suppress negative voltage transients during events like Fast-trip. Please go through the videos in below link to get more understanding on how to use the Design Calculator. /node/1133677 /node/1133673 /node/1133664 /node/1133681 Apologies for the delay in response." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS24710" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897780.json b/data/json/DLP/897780.json new file mode 100644 index 0000000000000000000000000000000000000000..62e97bc85cf61611e9272e74258419e29c0524d4 --- /dev/null +++ b/data/json/DLP/897780.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "897780", + "reporterName" : "kevin.huang_FJXM", + "rankPoints" : "410", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS25921A: TPS25921A monitor the current？", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 22", + "queryText" : "Part Number: TPS25921A My customer now uses ac-dc12v to supply power to the system. The current of DC12V can be brought to 2.5A. The 12V of the system will supply power to external sensors through several sockets, Now the problem is: when the external probe is short circuited, pull off the whole system. I hope there is a chip to monitor the current. When the external probe is short circuited or overloaded, cut off the 12V supplied to the external to ensure that my system will not restart or be pulled off. Does ti's tps25921adr or tps2490 meet our needs, Or you have better recommendations.", + "partNumber" : " TPS25921A", + "allResponseList" : [ { + "contentId" : "3318954", + "userName" : "Praveen GD", + "rankPoints" : "9575", + "rankName" : "Genius", + "date" : "Apr 17, 2020 5:18 AM", + "userId" : "4421098", + "content" : "Hi Kevin, Yes, TI's efuse devices detect a short at the output and turn off immediately. TPS25921A also has short circuit protection but I would recommend you to consider our latest and cost competitive devices TPS2596 or TPS2595 for your application. The short circuit response time of these efuses is few micro seconds." + }, { + "contentId" : "3325532", + "userName" : "Praveen GD", + "rankPoints" : "9575", + "rankName" : "Genius", + "date" : "Apr 23, 2020 11:39 AM", + "userId" : "4421098", + "content" : "Hi Kevin, Hope your issue is resolved. In case, you do not have further questions, can we close this thread ?" + }, { + "contentId" : "3326516", + "userName" : "kevin.huang_FJXM", + "rankPoints" : "410", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 2:08 AM", + "userId" : "5641146", + "content" : "Praveen:thank you!" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS25921A", "/support/power-management/f/196/tags/TPS2490", "/support/power-management/f/196/tags/monitor%2bthe%2bcurrent_2E00_" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897784.json b/data/json/DLP/897784.json new file mode 100644 index 0000000000000000000000000000000000000000..1ca251b2e941d2e112acd36476b11f441c738c6b --- /dev/null +++ b/data/json/DLP/897784.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "897784", + "reporterName" : "Tao_2199", + "rankPoints" : "4565", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS2660: About reverse polarity protection on UVLO pin", + "rankName" : "Genius", + "replies" : " 3", + "views" : " 16", + "queryText" : "Part Number: TPS2660 Hello, Regarding to reverse polarity protection on TPS2660, my customer is asking a question. According to datasheet page 21, reverse polarity protection is described as following. “In the applications where reverse polarity protection is required connect a minimum of 300-kΩ resistor between UVLO and IN_SYS.” (Question) Could you please tell me why 300-kΩ resistor can protect to reverse polarity( min -60V)? (The reason of why the resistor is 300kΩ minimum.) Regards, Tao_2199", + "partNumber" : " TPS2660", + "allResponseList" : [ { + "contentId" : "3318907", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 17, 2020 3:48 AM", + "userId" : "4743883", + "content" : "Hi Tao, UVLO is rated to -0.3V on the negative side. So, min 300kOhm is recommended to protect UVLO pin under reverse polarity condition. Best Regards, Rakesh" + }, { + "contentId" : "3323578", + "userName" : "Tao_2199", + "rankPoints" : "4565", + "rankName" : "Genius", + "date" : "Apr 22, 2020 12:22 AM", + "userId" : "4655482", + "content" : "Hello Rakesh. Thank you for reply. I have additional question. ･Why 300-kΩ resistor can protect from -0.3V(UVLO minimum rate)? Does this device protect UVLO pin by internal protect diode? Or is it related with UVLO Input leakage current? Could you please tell us theoretical explanation more detail? Regards, Tao_2199" + }, { + "contentId" : "3323770", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 4:34 AM", + "userId" : "4743883", + "content" : "Hi Tao, As you know, each pin has ESD diodes. These diodes get forward biased under reverse polarity condition and excessive currents could flow leading to the damage. To avoid that, -0.3V limit is imposed in the spec. The other way is to use a resistor in the path to limit the currents (under few mA) through the ESD diode under reverse polarity condition. This is what the 300-kΩ resistor does here. Best Regards, Rakesh" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS2660" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897797.json b/data/json/DLP/897797.json new file mode 100644 index 0000000000000000000000000000000000000000..9b0df235775861a0cf6e02b7ff87a1a87f56af3f --- /dev/null +++ b/data/json/DLP/897797.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "897797", + "reporterName" : "Eric Shen42", + "rankPoints" : "2750", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM5146-Q1: LM5146 input filter", + "rankName" : "Expert", + "replies" : " 3", + "views" : " 21", + "queryText" : "Part Number: LM5146-Q1 Dear: When I used LM5146 for 72V turn 5V, when hot plus, the input surge will up to 100V, so the LM5146 would be damaged. I want to used a R+C parallel to the ground, i think this has some effect on the absorption of spikes, the circuit as below: no 12V, the maxim input is 72V. How to choose the resistance value and power value of the Rin? Or there are other recommendations for absorbing spikes? Thanks!", + "partNumber" : " LM5146-Q1", + "allResponseList" : [ { + "contentId" : "3318940", + "userName" : "Timothy Hegarty", + "rankPoints" : "13220", + "rankName" : "Genius", + "date" : "Apr 17, 2020 4:43 AM", + "userId" : "1877696", + "content" : "HI Eric, My understanding is you're asking about input filter damping. The damping cap (electrolytic) is 4x the input cap value (and take the effective value if ceramic). Then the resistor is R = SQRT(L/C) where L is the input filter inductance or the parasitic line inductance and C is the input cap value. If you need further support, please send the schematic and a completed LM5146-Q1 quickstart calculator (available by download from the product folder). Regards, Tim" + }, { + "contentId" : "3318961", + "userName" : "Eric Shen42", + "rankPoints" : "2750", + "rankName" : "Expert", + "date" : "Apr 17, 2020 5:26 AM", + "userId" : "1593417", + "content" : "Hi Tim: Thanks! Whether the resistance power is required? Such as 1/4 W, 1/2 W?" + }, { + "contentId" : "3327721", + "userName" : "Timothy Hegarty", + "rankPoints" : "13220", + "rankName" : "Genius", + "date" : "Apr 25, 2020 1:39 AM", + "userId" : "1877696", + "content" : "Hi Eric, You mean the power rating of the damping resistor? If yes, then a standard 0805 resistor should be fine. If there is an AC voltage superimposed on the DC input, then the power rating requirement may be higher. Regards, Tim" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM5146_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897798.json b/data/json/DLP/897798.json new file mode 100644 index 0000000000000000000000000000000000000000..9ece26219c6e748a2aa3b024f816e6dda5f9a393 --- /dev/null +++ b/data/json/DLP/897798.json @@ -0,0 +1,71 @@ +{ + "ticketNumber" : "897798", + "reporterName" : "user6108590", + "rankPoints" : "50", + "resolutionStatus" : "", + "ticketName" : "BQ25883: bq25883 always enter windpm regulation", + "rankName" : "Prodigy", + "replies" : " 7", + "views" : " 42", + "queryText" : "Part Number: BQ25883 hellocompany using bq25883 charge two-cell li-ion battery(7.6V) adapter :5V, 2.4A setting as below: charge current:1A d+ short with d- input current limit: 3A result: charge current:660mA REG:0x0B VALUE:0x23 Can you tell me the reason?Why does the charging current fall short of expectations", + "partNumber" : " BQ25883", + "allResponseList" : [ { + "contentId" : "3319703", + "userName" : "Michael Emanuel35", + "rankPoints" : "2055", + "rankName" : "Intellectual", + "date" : "Apr 17, 2020 4:07 PM", + "userId" : "4996893", + "content" : "It is hard to diagnose the problem without a schematic and without a waveform. However, if you read the register table, it indicates you are in VINDPM regulation because bit 5 of 0x0B is 1. The default setting is 4.3 V. Your adapter may be unable to provide the rated current. This means the voltage on VBUS is dipping below the VINDPM setting and the current is being limited to prevent further dropping of VBUS. Thanks, Mike Emanuel Please click \"This resolved my issue\" button if this post answers your question." + }, { + "contentId" : "3320186", + "userName" : "user6108590", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 18, 2020 5:47 AM", + "userId" : "6108590", + "content" : "hi michael,thanks for your reply. the schematic is designed ref the demo. 1st: the adpater can provide the rated current.(Simulate adapter with DC power supply) 2nd: if set the vindpm 5v reg 0B value:0X23 indicates enter VINDPM regulation if set the vindpm 4.3v reg 01 value:0x94 indicates enter HIZ the reg value as showed below: bq25883 reg:0x00 value:0xA0 bq25883 reg:0x01 value:0x14 bq25883 reg:0x02 value:0x8D bq25883 reg:0x03 value:0x39 bq25883 reg:0x04 value:0x22 bq25883 reg:0x05 value:0xA7 bq25883 reg:0x06 value:0x3D bq25883 reg:0x07 value:0x02 bq25883 reg:0x08 value:0x0D bq25883 reg:0x09 value:0xF6 bq25883 reg:0x0A value:0x19 bq25883 reg:0x0B value:0x23 bq25883 reg:0x0C value:0x80 bq25883 reg:0x0D value:0x00 bq25883 reg:0x0E value:0x00 bq25883 reg:0x0F value:0xE9 bq25883 reg:0x10 value:0x93 bq25883 reg:0x11 value:0x08 bq25883 reg:0x12 value:0x00 bq25883 reg:0x13 value:0x00 bq25883 reg:0x14 value:0x00 bq25883 reg:0x15 value:0xC0 bq25883 reg:0x16 value:0x02 bq25883 reg:0x17 value:0x03 bq25883 reg:0x18 value:0x44 bq25883 reg:0x19 value:0x01 bq25883 reg:0x1A value:0xE9 bq25883 reg:0x1B value:0x14 bq25883 reg:0x1C value:0x31 bq25883 reg:0x1D value:0x1F bq25883 reg:0x1E value:0x5F bq25883 reg:0x1F value:0x1F bq25883 reg:0x20 value:0x73 bq25883 reg:0x21 value:0x02 bq25883 reg:0x22 value:0x11 bq25883 reg:0x23 value:0x00 bq25883 reg:0x24 value:0x44 bq25883 reg:0x25 value:0x19" + }, { + "contentId" : "3320237", + "userName" : "user6108590", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 18, 2020 9:43 AM", + "userId" : "6108590", + "content" : "The adapter voltage is 5V When VINDPM is set to 5V, it can be charged, but into VINDPM REGULATION When VINDPM is set to 4.3v, go directly to HIZ" + }, { + "contentId" : "3320516", + "userName" : "Michael Emanuel35", + "rankPoints" : "2055", + "rankName" : "Intellectual", + "date" : "Apr 19, 2020 6:39 PM", + "userId" : "4996893", + "content" : "In order to further diagnose this problem, I would appreciate if you could provide the schematic you are using. In addition, I would like a waveform of IBUS, VBUS, SW, and IBAT. I would like you to trigger on the edge that VBUS goes high for each setting of VINDPM. The part appears to still be in VINDPM from the registers you provided. Thanks, Mike Emanuel Please click \"This resolved my issue\" button if this post answers your question." + }, { + "contentId" : "3320626", + "userName" : "user6108590", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 2:24 AM", + "userId" : "6108590", + "content" : "THE SCH IS SHOWN AS ABOVE: THE BQ25883 is used only as a battery charger." + }, { + "contentId" : "3321603", + "userName" : "Michael Emanuel35", + "rankPoints" : "2055", + "rankName" : "Intellectual", + "date" : "Apr 20, 2020 4:28 PM", + "userId" : "4996893", + "content" : "If you could provide some waveforms (IBUS, VBUS, SW, and IBAT upon startup) for each case of VINPDM that would be helpful. Upon second look at your register settings, 0x80 in REG 0C indicates Power Good with no input. For some reason your input is not being detected. How long is your input cable (more specifically what is its impedance)? To me, if VINDPM is 5 V, which is your adapter rated voltage, it can pull some of your desired current, but maybe not all because of the impedance of the cable. When you try to pull the desired current at VINDPM of 4.3 V, you may be crashing the adapter. Thanks, Mike Emanuel Please click \"This resolved my issue\" button if this post answers your question." + }, { + "contentId" : "3322145", + "userName" : "user6108590", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 1:25 AM", + "userId" : "6108590", + "content" : "thank you for your replly. In my opinion: use the same adapter ,different vindpm setting Q1: setting :5V is easier to enter the vindpm regulation(or hiz) than setting 4.3v. Q2: I don't understand why bq25883 enter to hiz when the vindpm value is setted 4.3v. later i will attach the test pic." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25883", "/support/power-management/f/196/tags/_2D00_" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897804.json b/data/json/DLP/897804.json new file mode 100644 index 0000000000000000000000000000000000000000..26cc00cd63ad23b1501905b2db09b5b0b3b5a73b --- /dev/null +++ b/data/json/DLP/897804.json @@ -0,0 +1,71 @@ +{ + "ticketNumber" : "897804", + "reporterName" : "Alex Fields", + "rankPoints" : "60", + "resolutionStatus" : "", + "ticketName" : "BQ24707A: IFAULT not tripping", + "rankName" : "Prodigy", + "replies" : " 7", + "views" : " 63", + "queryText" : "Part Number: BQ24707A hi, in the bq24707a, I have set input current register 0x3f to numerous current levels, including 128mA, I have set 0x12 to 0x218 which should enable Acoc function. no matter what I do, either set my charge current more than 2x above my input current, or draw additional current from acn to gnd using a resistor, the ifault does not trip. I also do not understand \"the ic cannot maintain the input current level if the charge current has been already reduced to 0\" does this mean I have to have my charge current be 0, and draw current through the acp acn shunt externally to trigger the ifault? either way, I could not trigger a fault.", + "partNumber" : " BQ24707A", + "allResponseList" : [ { + "contentId" : "3320075", + "userName" : "Tiger Zhou", + "rankPoints" : "610", + "rankName" : "Prodigy", + "date" : "Apr 17, 2020 10:48 PM", + "userId" : "1451791", + "content" : "Hi, Could you provide the register values? Please check if ACOC is disabled." + }, { + "contentId" : "3320081", + "userName" : "Angelo Zhang87", + "rankPoints" : "6530", + "rankName" : "Expert", + "date" : "Apr 17, 2020 11:11 PM", + "userId" : "5346700", + "content" : "Hi Alex, As Tiger suggested, can you please confirm your ChargeOption() register setting? If 0x12h = 0x0218, then bits [2:1] would be 00, disabling ACOC. /IFAULT is pulled low when ACOC or a MOSFET short circuit is detected. This corresponds to the 3 comparators shown below. These comparators monitor the voltage drops across the HSFET, LSFET, and Rac sense resistor, and they trip when the voltage exceeds a certain threshold. Best regards, Angelo" + }, { + "contentId" : "3320130", + "userName" : "Alex Fields", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 18, 2020 1:00 AM", + "userId" : "6325443", + "content" : "here are my registers in format: register: High byte, low byte 0x12: 0x19, 0x04 0x14: 0x08, 0x00 0x15: 0x32, 0x00 0x3f: 0x01, 0x00 because of these register values, acoc should be enabled. I draw 1amp of current, way above 2x the limit of acoc, and the ifault doesn't trip. I've also noticed that the outside pin is exactly correct when charge current is chosen (200mV @ 1A), but the iout pin is wildly inaccurate when input current is chosen (75mV @ 1A charging). this doesnt make sense because the input current is the charging current plus what it takes to run the ic. I've verified we are using a 10m resistor between acn and acp." + }, { + "contentId" : "3321957", + "userName" : "Alex Fields", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 8:55 PM", + "userId" : "6325443", + "content" : "here are my registers in format: register: High byte, low byte 0x12: 0x19, 0x04 0x14: 0x08, 0x00 0x15: 0x32, 0x00 0x3f: 0x01, 0x00 because of these register values, acoc should be enabled. I draw 1amp of current, way above 2x the limit of acoc, and the ifault doesn't trip. I've also noticed that the outside pin is exactly correct when charge current is chosen (200mV @ 1A), but the iout pin is wildly inaccurate when input current is chosen (75mV @ 1A charging). this doesnt make sense because the input current is the charging current plus what it takes to run the ic. I've verified we are using a 10m resistor between acn and acp." + }, { + "contentId" : "3325811", + "userName" : "Angelo Zhang87", + "rankPoints" : "6530", + "rankName" : "Expert", + "date" : "Apr 23, 2020 3:14 PM", + "userId" : "5346700", + "content" : "Hi Alex, Thanks for the information, and sorry for the delayed response. Based on your provided register settings, your charge current = 2.048 A, charge voltage = 12.8 V, and input current limit = 256 mA. Let me know if there are any misunderstandings so far. I have several questions to debug this further: 1) What is the adapter voltage? 2) What do you have connected to your board? My understanding is that you have the adapter, host MCU, and battery connected, but no system load. Is this correct? The reason I ask this is because the adapter voltage, charge voltage, charge current, and the presence of a system load all affect the amount of input current needed. This could explain why your IOUT pin is accurate for charge current, but not for input current. 3) Can you please share your schematic? 4) Can you please capture a waveform that shows the input current, /IFAULT, charge current, and SRN? Please also use a multimeter to measure the ACP and ACN voltages. 5) Aside from /IFAULT, is the charger working as expected? 6) You mentioned in your other thread that the /IFAULT pin is pulled up to 3.3 V through a 100 kΩ resistor. Can you try using a 10 kΩ pull-up resistor instead? Best regards, Angelo" + }, { + "contentId" : "3326187", + "userName" : "Alex Fields", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 7:53 PM", + "userId" : "6325443", + "content" : "1) 18V 2) You are correct, but i have had the following for system load: I have had no load, a 70 ohm load, and a 3s lithium ion battery load. I have also had a separate load attached from ACN to GND to simulate an input current fault 3) 4) I do not have access to the charger today, but can provide later 5) yes 6) I can try that, but i do not understand the advice. If the hypothesis is ifault is having trouble pulling down, a stronger pullup will only make that problem worse. Thanks, alex" + }, { + "contentId" : "3326203", + "userName" : "Angelo Zhang87", + "rankPoints" : "6530", + "rankName" : "Expert", + "date" : "Apr 23, 2020 8:15 PM", + "userId" : "5346700", + "content" : "Hi Alex, Thanks for the information. 4) Okay, please provide these test results when you get a chance. 6) I suggested a 10 kΩ pull-up resistor for the sake of consistency with the datasheet schematic, but you're correct that this is unlikely to be the issue since your /IFAULT pin isn't pulling down. 4) is still our main path for debugging. Best regards, Angelo" + } ], + "tags" : [ "/support/power-management/f/196/tags/ifault", "/support/power-management/f/196/tags/charging", "/support/power-management/f/196/tags/bq24707a", "/support/power-management/f/196/tags/fault", "/support/power-management/f/196/tags/charger" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897827.json b/data/json/DLP/897827.json new file mode 100644 index 0000000000000000000000000000000000000000..99cf6af58cd277d619ee957d700702347d575335 --- /dev/null +++ b/data/json/DLP/897827.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "897827", + "reporterName" : "user5503575", + "rankPoints" : "460", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ78350-R1: CEDV Load Profile", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 23", + "queryText" : "Part Number: BQ78350-R1 Hi, I am using BQ76930 and BQ78350 for my battery pack. And I will use CEDV function but I have issue about the log files which I have to upload GPCPackager for CEDV fuction. I will use my battery from -20°C to 30°C. And my load is not constant. Which 3 temperature level should I apply ? I am thinking to apply -20°C, 10°C and 30°C. My repeater load profile is; 300W 100ms 150W 500ms 200W 40s 150W 10s 50W 5s This load profile repeats until SOC gets down %0. I need to apply 2 load profile for CEDV. Should I apply half and full of this profile values?", + "partNumber" : " BQ78350-R1", + "allResponseList" : [ { + "contentId" : "3319911", + "userName" : "Matt Sunna", + "rankPoints" : "24930", + "rankName" : "Mastermind", + "date" : "Apr 17, 2020 7:19 PM", + "userId" : "269312", + "content" : "Hi, The temperature levels you selected are good for the temperature range of your application. For the load, I suggest full load and half load. When you collect the logs, make sure you set your protection thresholds wider than normal so that protections FETs do not open before reaching your terminate voltage. This will help the GPCCEDV tool to calculate parameters with better accuracy. Best regards, Matt" + }, { + "contentId" : "3322669", + "userName" : "user5503575", + "rankPoints" : "460", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 11:38 AM", + "userId" : "5503575", + "content" : "Matt Sunna When you collect the logs, make sure you set your protection thresholds wider than normal so that protections FETs do not open before reaching your terminate voltage. This will help the GPCCEDV tool to calculate parameters with better accuracy. Thank you Matt. I have set current and temperature thresholds wider than normal conditions. There is no issue about current and temperature protections. But I confused about voltage protection thresholds. I set CUV thresholds to 2500mV. I will use my cells between 4.2V to 2.5V. Is it okey for GPCCEDV tool to calculate parameters with better accuracy?" + }, { + "contentId" : "3323118", + "userName" : "Matt Sunna", + "rankPoints" : "24930", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 4:07 PM", + "userId" : "269312", + "content" : "These voltages should be okay. Regards, Matt" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ76930", "/support/power-management/f/196/tags/bq78350", "/support/power-management/f/196/tags/BQ78350_2D00_R1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897836.json b/data/json/DLP/897836.json new file mode 100644 index 0000000000000000000000000000000000000000..c4e3caa6024e555dc17767947a4e395c30776aa5 --- /dev/null +++ b/data/json/DLP/897836.json @@ -0,0 +1,71 @@ +{ + "ticketNumber" : "897836", + "reporterName" : "Roy Chou1", + "rankPoints" : "1580", + "resolutionStatus" : "", + "ticketName" : "TPS3840-Q1: 2s dection and 8s delay", + "rankName" : "Intellectual", + "replies" : " 7", + "views" : " 31", + "queryText" : "Part Number: TPS3840-Q1 Hi Team, I know our reset IC could achieve delay function but customer would like to have below extra function, do you have any idea how to achieve or any IC could meet the requirement? Regards, Roy", + "partNumber" : " TPS3840-Q1", + "allResponseList" : [ { + "contentId" : "3319153", + "userName" : "Abhinav.Sharma", + "rankPoints" : "6855", + "rankName" : "Expert", + "date" : "Apr 17, 2020 8:41 AM", + "userId" : "4691355", + "content" : "Hi Roy, I believe you are looking for a voltage detector with adjustable delay on both the rising and falling edge, correct? We consider this SENSE delay and RESET delay. The TPS3840-Q1 does not have this feature, but a device such as the TLV840 does. Could you take a look and see if this is along the lines of the solution you desire? If not, let me know, and we can probably configure one of our supervisors with a few external parts to figure it out. Thanks, Abhinav." + }, { + "contentId" : "3319310", + "userName" : "Roy Chou1", + "rankPoints" : "1580", + "rankName" : "Intellectual", + "date" : "Apr 17, 2020 11:20 AM", + "userId" : "6162312", + "content" : "Hi Abhinav, I think TLV840 isn't a appropriate solution. Let me use word description for you. Set voltage input = 4.1V initially when voltage input lower that our solution VIH(ex.0.5V) and time duration is larger than 2s and then IC output goes low after 10s delay. when voltage input lower that our solution VIH(ex.0.5V) but time duration is smaller than 2s and then IC output remains high. If there is anything unclearly, please feel free to let me know. Roy" + }, { + "contentId" : "3323738", + "userName" : "Roy Chou1", + "rankPoints" : "1580", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 3:34 AM", + "userId" : "6162312", + "content" : "Hi Team, Any suggestion? Roy" + }, { + "contentId" : "3323844", + "userName" : "Abhinav.Sharma", + "rankPoints" : "6855", + "rankName" : "Expert", + "date" : "Apr 22, 2020 6:20 AM", + "userId" : "4691355", + "content" : "So essentially you are looking for adjustable glitch immunity (ignore pulses under 2s)? Thanks, Abhinav." + }, { + "contentId" : "3323960", + "userName" : "Roy Chou1", + "rankPoints" : "1580", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 8:13 AM", + "userId" : "6162312", + "content" : "Hi Abhunav, Yes. Do you have any suggestion? Roy" + }, { + "contentId" : "3327809", + "userName" : "Abhinav.Sharma", + "rankPoints" : "6855", + "rankName" : "Expert", + "date" : "Apr 25, 2020 8:44 AM", + "userId" : "4691355", + "content" : "Hi Roy, This cannot be achieved with a one chip solution that I know of. The glitch immunity we offer is in the range of ~20us and at the lowest overdrive. To be able to ignore pulses less than 2s, you might have to implement timer logic or monitor the voltage as a WDI line on a watchdog, but I'm not sure how easily it can be implemented. Is the customer looking for a one IC solution to this problem? Thanks, Abhinav." + }, { + "contentId" : "3327963", + "userName" : "Roy Chou1", + "rankPoints" : "1580", + "rankName" : "Intellectual", + "date" : "Apr 26, 2020 4:05 AM", + "userId" : "6162312", + "content" : "Hi Abhinav, It could be implemented by two more IC solution. Do you have any idea or APP note which is related to this spec? Regards, Roy" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS3840_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897848.json b/data/json/DLP/897848.json new file mode 100644 index 0000000000000000000000000000000000000000..c591852f089051c5ca81f79d78c5078e41f9349b --- /dev/null +++ b/data/json/DLP/897848.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "897848", + "reporterName" : "zane xu", + "rankPoints" : "130", + "resolutionStatus" : "Resolved", + "ticketName" : "AWR1243： Some questions about the collected dataof AWR1243", + "rankName" : "Prodigy", + "replies" : " 6", + "views" : " 55", + "queryText" : "Part Number: AWR1243 Hi, Based on the example provided by TI, we designed a cascade mmwave radar system using AWR1243 ES3.0. According to the \"mmWave-Radar-Interface-Control\", I completed the configuration of all the chips and was able to get the data with the correct CP header. But I found that some of the data was wrong. The figure below is the absolute value of the collected data for all channels. The X-axis is the channel number. The Y-axis is the index value of the sample point. I found that some of the channel data was wrong, such as the acquisition of a period of noise. Through analysis, it is found that all the channels in question are the data received by the master chip. I wrote the firmware into FLASH. The path of the firmware is \"C:\\ti\\mmwave_dfp_01_02_05_01\\firmware\\xwr12xx_metaImage.bin\". Can you help me to analyze the cause of this problem ? Thank you very much!", + "partNumber" : " AWR1243", + "allResponseList" : [ { + "contentId" : "3319383", + "userName" : "Cesar", + "rankPoints" : "52960", + "rankName" : "Guru", + "date" : "Apr 17, 2020 12:50 PM", + "userId" : "20288", + "content" : "Hi, A cascade system is very complex and there could be multiple root causes to this problem. Have you tried testing with one chip only? Do you see same behavior? thank you Cesar" + }, { + "contentId" : "3319748", + "userName" : "Randy Rosales", + "rankPoints" : "5580", + "rankName" : "Expert", + "date" : "Apr 17, 2020 4:38 PM", + "userId" : "1068709", + "content" : "Hi Xane, At this time the CP and CQ data are not supported in the MMWCAS-DSP-EVM data captures with mmWave Studio. Thank you, -Randy" + }, { + "contentId" : "3319783", + "userName" : "zane xu", + "rankPoints" : "130", + "rankName" : "Prodigy", + "date" : "Apr 17, 2020 5:10 PM", + "userId" : "4137681", + "content" : "Hi Randy, Thank you for your reply. I used the FPGA system designed by myself for data acquisition, instead of MMWCAS-DSP-EVM. Here are some of the parameters I set, Data Path : LVDS Packet 0 : CP_ADC Packet 1 : Suppress Packet Lane Clock : SDR Clock Data Rate : 300Mbps ADC Samples : 1024 The manual mentions a maximum sample point of 1024 for the Complex2x mode. You mean that Packet0 should be configured as ADC_ONLY? Thank you" + }, { + "contentId" : "3319786", + "userName" : "zane xu", + "rankPoints" : "130", + "rankName" : "Prodigy", + "date" : "Apr 17, 2020 5:13 PM", + "userId" : "4137681", + "content" : "Hi Cesar, Thank you for your reply. I think I should follow your advice. I'll try testing with one chip only. Thank you" + }, { + "contentId" : "3320061", + "userName" : "Randy Rosales", + "rankPoints" : "5580", + "rankName" : "Expert", + "date" : "Apr 17, 2020 10:28 PM", + "userId" : "1068709", + "content" : "Hi Zane, Thank you for clarifying that this is not using the MMWCAS-DSP-EVM. You should not have any limitations then. But for debugging a new ADC sample receiver system, as Cesar as recommend, please incrementally add features in the simplest state first. Please let us know what you find. Thank you, -Randy" + }, { + "contentId" : "3327923", + "userName" : "zane xu", + "rankPoints" : "130", + "rankName" : "Prodigy", + "date" : "Apr 26, 2020 1:26 AM", + "userId" : "4137681", + "content" : "Hi Randy, According to the manual for MIMO radar calibration provided by TI, I think the problem is the hardware design differences between the chips and the lack of system correction. When I have done amplitude and phase correction according to the solution in the manual, I got a result that met my expectations. The manual I refer to is TIDEP-01012, this may help more people. Thank you" + } ], + "tags" : [ "/support/sensors/f/1023/tags/awr20_5F00_p2_5F00_swa20_5F00_cascade", "/support/sensors/f/1023/tags/AWR1243" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897850.json b/data/json/DLP/897850.json new file mode 100644 index 0000000000000000000000000000000000000000..38a61b8aec4854706f3046faeba77df3a1fc86c5 --- /dev/null +++ b/data/json/DLP/897850.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "897850", + "reporterName" : "Songzhen Guo", + "rankPoints" : "550", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS65381-Q1: How to shutdown the Charger pump", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 26", + "queryText" : "Part Number: TPS65381-Q1 Hi Team, TPS65381-Q1 was used in customer's project. They have several EMI problem. Customer want to shutdown Charger pump to improve the EMI performance. But the device is out of work when capacitor was remove from board. Could you help us to find a way to shut charger pump down? Thanks. BR Songzhen Guo", + "partNumber" : " TPS65381-Q1", + "allResponseList" : [ { + "contentId" : "3319878", + "userName" : "Ivan Calzada", + "rankPoints" : "4015", + "rankName" : "Expert", + "date" : "Apr 17, 2020 6:36 PM", + "userId" : "1720474", + "content" : "Hi Songzhen, The charge pump cannot be enable/disable manually. As described in section 5.3.6 of the datasheet the charge pump is automatically turned off once the CP_OV is set. CP_OV is typically set when VCP is above (VBAT + 12 V). Removing the capacitor between CP1 and CP2 will disable the charge pump but will also cause no overdrive voltage for internal VDD6 FET which will cause VMON to detect an undervoltage condition. Could you please confirm your customer is following the TPS65381-Q1 and TPS65381A-Q1 Design Checklist (/lit/an/slva611a/slva611a.pdf)? Regards, Ivan" + }, { + "contentId" : "3320653", + "userName" : "Songzhen Guo", + "rankPoints" : "550", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 2:51 AM", + "userId" : "5867784", + "content" : "Hi Ivan, Thank you so much for you feedback. I have confirmed the checklist with customer, they followed the checklist. Could you share the layout file(Project file) of TPS65381EVM with customer? Is there any other device recommendation for this kind of application that without charger pump？ If this file is NDA, please sent it to me thought E-mail. I will check the NDA with customer. Thanks. BR Songzhen Guo" + }, { + "contentId" : "3324040", + "userName" : "Songzhen Guo", + "rankPoints" : "550", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 9:43 AM", + "userId" : "5867784", + "content" : "Hi Team， Could you provide the layout of TPS65381EVM (Project File) for customer? Thanks. BR Songzhen Guo" + }, { + "contentId" : "3324536", + "userName" : "Ivan Calzada", + "rankPoints" : "4015", + "rankName" : "Expert", + "date" : "Apr 22, 2020 3:36 PM", + "userId" : "1720474", + "content" : "Hi Songzhen Guo, I will close this thread since we have switch to email communication. Regards, Ivan" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS65381_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897859.json b/data/json/DLP/897859.json new file mode 100644 index 0000000000000000000000000000000000000000..9aa903c19c36af067f90e008b91941b900e165dc --- /dev/null +++ b/data/json/DLP/897859.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "897859", + "reporterName" : "Shenhua Zhang", + "rankPoints" : "520", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS40322: EN control of TPS40322", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 23", + "queryText" : "Part Number: TPS40322 Customer wants to control sequence through EN pin. For TPS40322, we can pull EN to GND to disable IC, and float to enable, but we cannot pull EN to 3.3V to enable IC, right?", + "partNumber" : " TPS40322", + "allResponseList" : [ { + "contentId" : "3319393", + "userName" : "Qian Chen", + "rankPoints" : "21370", + "rankName" : "Mastermind", + "date" : "Apr 17, 2020 1:01 PM", + "userId" : "1501908", + "content" : "Hi Shenhua, That's right. We can not pull EN to 3.3V to enable IC. Customer can also use UVLO pin to turn on/off the part. Thanks Qian" + }, { + "contentId" : "3320458", + "userName" : "user5951090", + "rankPoints" : "10", + "rankName" : "Prodigy", + "date" : "Apr 19, 2020 12:00 PM", + "userId" : "5951090", + "content" : "Hi Qian, I want to add pull down resistor at EN pin to ensure the TPS40322 stays disabled, can you suggest resistor value? or any other method to to ensure TPS40322 stays disabled?" + }, { + "contentId" : "3322728", + "userName" : "Qian Chen", + "rankPoints" : "21370", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 12:36 PM", + "userId" : "1501908", + "content" : "Hello, I suggest to use a small FET to pull EN pin low to ensure the part stay disabled. By releasing EN pin, the rail will start up. Thanks Qian" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS40322" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897865.json b/data/json/DLP/897865.json new file mode 100644 index 0000000000000000000000000000000000000000..d82ef37659a5f573aa00381e25dfe7808fd9f693 --- /dev/null +++ b/data/json/DLP/897865.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "897865", + "reporterName" : "Oliver Ou", + "rankPoints" : "2550", + "resolutionStatus" : "", + "ticketName" : "BQ24232: Reverse current on BQ24232", + "rankName" : "Intellectual", + "replies" : " 5", + "views" : " 32", + "queryText" : "Part Number: BQ24232 Hi, Customer uses BQ24232 with below circuit: U6 is a boot converter, U70 is BQ24232, BAT_VCC connects to a small battery. V_BAT connect to external battery to charger internal battery on BAT_VCC, the current is 30mA and meets design spec. when removing the battery on V_BAT, there is a reverse current from U70 to U6, the current is higher to 63mA. and also see an oscillation on PV50 point(input of U70) Could you check and give some comments for this phenomena? Dose BQ24232 has reverse current blocking feature? Thanks.", + "partNumber" : " BQ24232", + "allResponseList" : [ { + "contentId" : "3319989", + "userName" : "Raheem", + "rankPoints" : "16655", + "rankName" : "Genius", + "date" : "Apr 17, 2020 8:54 PM", + "userId" : "4697250", + "content" : "Hello Oliver, The BQ24232 has reverse blocking feature. What's the frequency of the oscillation? Do you see a similar behavior without the boost converter?" + }, { + "contentId" : "3320448", + "userName" : "Ma Hank", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 19, 2020 10:35 AM", + "userId" : "5882554", + "content" : "Hi Raheem, I am the customer using this chip. The frequency is about 900Hz. It seems that the reverse block does not work when the V_BAT is removed." + }, { + "contentId" : "3324410", + "userName" : "Oliver Ou", + "rankPoints" : "2550", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 2:31 PM", + "userId" : "1117254", + "content" : "Hi Raheem, Refer to Hank's feedback about the frequency，Could you give more comments or suggestion for this issue? If need more information, please let us know too. Thanks a lot." + }, { + "contentId" : "3325049", + "userName" : "Raheem", + "rankPoints" : "16655", + "rankName" : "Genius", + "date" : "Apr 23, 2020 1:16 AM", + "userId" : "4697250", + "content" : "Hello, I'm curious where the current is coming from since there is no battery present. Can you try to first remove the boost converter and see if the issue occurs. Next, sent EN1 and EN2 high. This will turn off the input FET. And check again if the issue occurs." + }, { + "contentId" : "3325370", + "userName" : "Ma Hank", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 7:47 AM", + "userId" : "5882554", + "content" : "There is a small Li-ion battery connected to the BAT1/2 of the U70. But the output of this chip is disconnected to the load. If the booster is removed, then it is OK. Or If I place a forward diode to replace the FB5, the bead connected to the booster and charger, then it is also ok. It may exist some unknown path... If I place a current meter in series with the battery at the charger side(BAT1/2), then it is also ok...." + } ], + "tags" : [ "/support/power-management/f/196/tags/bq24232" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897867.json b/data/json/DLP/897867.json new file mode 100644 index 0000000000000000000000000000000000000000..746a727619032c1b7cb418593a4fa5cdde4cee44 --- /dev/null +++ b/data/json/DLP/897867.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "897867", + "reporterName" : "MORI ANTONIO", + "rankPoints" : "20", + "resolutionStatus" : "", + "ticketName" : "UC2525A: syncronization by microcontroller", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 23", + "queryText" : "Part Number: UC2525A I would like to synchronize 4 cards with UC2525A working in parallel. I would like to generate the clock (about 40KHz) with a microcontroller and connect it to the 4 boards. Should this clock be connected to the SYNC pin of the UC2525A? How will the RT, CT, DISCHARGE pins be used ? How to manage the Dead-Time of each card ? Is there a different solution to synchronize 4 cards with a microcontroller? Thanks", + "partNumber" : " UC2525A", + "allResponseList" : [ { + "contentId" : "3319494", + "userName" : "Sonal Singh", + "rankPoints" : "5240", + "rankName" : "Expert", + "date" : "Apr 17, 2020 2:06 PM", + "userId" : "4787382", + "content" : "Hello Antonio, Please refer to the post below on how to sync multiple controllers. /support/power-management/f/196/p/130842/522755?tisearch=e2e-quicksearch&keymatch=uc3525#522755 I hope this helps. In terms of the Rt, Ct and dead time settings, I would suggest they are set the same on all your controllers. Regards, Sonal" + }, { + "contentId" : "3323828", + "userName" : "MORI ANTONIO", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 6:07 AM", + "userId" : "3171860", + "content" : "if I understand correctly, this is what happens: - I generate the F-frequency with the microcontroller. Is the duty cycle important? - I connect this F frequency to the SYNC pin of each device. - I use the RT-CT-DISHARGE pins of each device to obtain a 0.9F frequency and the desired dead time. This way they all work in sync So it would also be possible to do a frequency jettering with the micro ?" + } ], + "tags" : [ "/support/power-management/f/196/tags/UC2525A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897874.json b/data/json/DLP/897874.json new file mode 100644 index 0000000000000000000000000000000000000000..3d9e95b7f4bd96a00206abba15b9e50139b9dd26 --- /dev/null +++ b/data/json/DLP/897874.json @@ -0,0 +1,71 @@ +{ + "ticketNumber" : "897874", + "reporterName" : "GARAM AN", + "rankPoints" : "965", + "resolutionStatus" : "", + "ticketName" : "About buck converter feedback resistor", + "rankName" : "Intellectual", + "replies" : " 7", + "views" : " 43", + "queryText" : "Hello all, I have a question about feedback resistor setting. If Vref=Vout as 0.8V, Do I need to put feedback resistor or connect Vout to the FB pin directly? (the condition is Vin=4v, Vout=0.8v, Iout=4A and Vref=0.8V) Thank you", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3319658", + "userName" : "Febin", + "rankPoints" : "1450", + "rankName" : "Intellectual", + "date" : "Apr 17, 2020 3:36 PM", + "userId" : "5781698", + "content" : "Hi Garam, Could you please specify the part number you are referring to? Thanks, Febin" + }, { + "contentId" : "3320183", + "userName" : "GARAM AN", + "rankPoints" : "965", + "rankName" : "Intellectual", + "date" : "Apr 18, 2020 5:38 AM", + "userId" : "6098866", + "content" : "Hi Febin, The part number that I consider is TPS54618-Q1. Thank you" + }, { + "contentId" : "3320963", + "userName" : "Dorian Brillet de Cande", + "rankPoints" : "5365", + "rankName" : "Expert", + "date" : "Apr 20, 2020 9:12 AM", + "userId" : "5350960", + "content" : "Hello Garam, You can connect FB directly to Vout to achieve 0.8V for TPS54618-Q1 As you are looking for a 4A part, you can also have a look at the TPS62810-Q1 which can better fit your needs. Thanks a lot! Regards, Dorian" + }, { + "contentId" : "3322158", + "userName" : "GARAM AN", + "rankPoints" : "965", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 1:36 AM", + "userId" : "6098866", + "content" : "Thank you Dorain, I could find putting small resistor(10~50ohm) on the top side can be a solution, it can be helped when I analyze AC characteristic. What effect and why the small resistor can be helped for the AC? Thank you" + }, { + "contentId" : "3322511", + "userName" : "Dorian Brillet de Cande", + "rankPoints" : "5365", + "rankName" : "Expert", + "date" : "Apr 21, 2020 8:44 AM", + "userId" : "5350960", + "content" : "Hello Garam, Can you share what improvements you have seen to be more explicit on what numbers we are looking at? Did you use a TINA-TI model here? Thanks a lot! Regards, Dorian" + }, { + "contentId" : "3322578", + "userName" : "GARAM AN", + "rankPoints" : "965", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 9:34 AM", + "userId" : "6098866", + "content" : "I asked what improvement if I put resistor like the picture. I did not use TINA, I just made it to show you how I put the resistor on the feedback path. Thank you" + }, { + "contentId" : "3324047", + "userName" : "Dorian Brillet de Cande", + "rankPoints" : "5365", + "rankName" : "Expert", + "date" : "Apr 22, 2020 9:49 AM", + "userId" : "5350960", + "content" : "Hello Garam, Knowing there is a small leakage current on this pin, putting a 30 Ohm resistor is not recommended as it will create a small drop and will not be beneficial for DC accuracy. Thank you, Dorian" + } ], + "tags" : [ ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897885.json b/data/json/DLP/897885.json new file mode 100644 index 0000000000000000000000000000000000000000..7dda09f3b7c215c49dbb31604bc32895c99eb7c5 --- /dev/null +++ b/data/json/DLP/897885.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "897885", + "reporterName" : "Yusuke Mukuno", + "rankPoints" : "3545", + "resolutionStatus" : "Resolved", + "ticketName" : "LMR33610: Current limit spec", + "rankName" : "Expert", + "replies" : " 3", + "views" : " 23", + "queryText" : "Part Number: LMR33610 Hi, Could you please let me know the LMR33610 current limit spec(Max, Typ)? I don't find the current limit spec in the datasheet.... Thanks Muk", + "partNumber" : " LMR33610", + "allResponseList" : [ { + "contentId" : "3319423", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 17, 2020 1:22 PM", + "userId" : "3498075", + "content" : "Hi Mukuno, Let me check with team and update you later. B R Andy" + }, { + "contentId" : "3320969", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 20, 2020 9:22 AM", + "userId" : "3498075", + "content" : "Hi Mukuno, LMR33610 current limit is same as LMR33620 spec. we will revise data sheet later. B R Andy" + }, { + "contentId" : "3322104", + "userName" : "Yusuke Mukuno", + "rankPoints" : "3545", + "rankName" : "Expert", + "date" : "Apr 21, 2020 12:29 AM", + "userId" : "1293847", + "content" : "Hi Andy-san, Thank you for your answer! Muk" + } ], + "tags" : [ "/support/power-management/f/196/tags/LMR33610" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897902.json b/data/json/DLP/897902.json new file mode 100644 index 0000000000000000000000000000000000000000..9d7dcd639ae821a2a7b51eef3ba43d1b79c76458 --- /dev/null +++ b/data/json/DLP/897902.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "897902", + "reporterName" : "DY Ko", + "rankPoints" : "2460", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS1H100-Q1: DIAG_EN pin connect", + "rankName" : "Intellectual", + "replies" : " 5", + "views" : " 40", + "queryText" : "Part Number: TPS1H100-Q1 Hello team, My customer want to use the TPS1H100B-Q1 for current limit protection only without using other diagnostics. Is it O.K. to connect the DIAG_EN pin to device GND in this case also as attached schematic below? Best regards, DY", + "partNumber" : " TPS1H100-Q1", + "allResponseList" : [ { + "contentId" : "3319590", + "userName" : "Anthony P Pham", + "rankPoints" : "1890", + "rankName" : "Intellectual", + "date" : "Apr 17, 2020 3:02 PM", + "userId" : "6169362", + "content" : "Hi, Yes, if you do not need the current sense analog output from the current sense pin, you can short the DIAG_EN pin to GND." + }, { + "contentId" : "3320126", + "userName" : "DY Ko", + "rankPoints" : "2460", + "rankName" : "Intellectual", + "date" : "Apr 18, 2020 12:52 AM", + "userId" : "337048", + "content" : "Hi Anthony, Thanks for your quick response. You mean the TPS1H100B-Q1 can suport the current limit protection by setting the current limit threshold(my customer's case: 2.466A) with exteral 1 kohm resistor at CL pin even though the DIAG_EN pin is connected to GND. Am I understanding correctly? Best regards, DY" + }, { + "contentId" : "3321292", + "userName" : "Anthony P Pham", + "rankPoints" : "1890", + "rankName" : "Intellectual", + "date" : "Apr 20, 2020 2:06 PM", + "userId" : "6169362", + "content" : "Hi DY, With a 1kOhm resistor, the calculated current limit is 3.0825A. If you'd like to set the current limit to 2.466A, you should use the closest resistor value to 1.25-kOhms. In regards to your question, yes, the device can support current limit protection with the DIAG_EN pin connected to ground. The DIAG_PIN when pulled high enables diagnostics, which in the case of the B version, allows for measuring the current as a voltage level using an external resistor. If you do not need external current measurents, then it is fine to pull the DIAG_EN pin to ground." + }, { + "contentId" : "3322121", + "userName" : "DY Ko", + "rankPoints" : "2460", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 12:44 AM", + "userId" : "337048", + "content" : "Hi Anthony, Thank you. But I don't understand why the 1.25 kohm was recommended, instead 1kohm. Because the calculated resistor value was 1 kohm for 2.466A current limit threshold based on the equation (12) as below in the datasheet. Best regards, DY" + }, { + "contentId" : "3322245", + "userName" : "Anthony P Pham", + "rankPoints" : "1890", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 3:24 AM", + "userId" : "6169362", + "content" : "Oh yes, my mistake it looks like I had incorrectly referenced a number. The 1-kOhm is correct. My apologies." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS1H100_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897944.json b/data/json/DLP/897944.json new file mode 100644 index 0000000000000000000000000000000000000000..904572860ce28a820edb44428995fb10ae248c16 --- /dev/null +++ b/data/json/DLP/897944.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "897944", + "reporterName" : "Stefano Cirelli", + "rankPoints" : "180", + "resolutionStatus" : "", + "ticketName" : "IWR6843ISK-ODS: Issue with unit test of mmwavelink library", + "rankName" : "Prodigy", + "replies" : " 10", + "views" : " 64", + "queryText" : "Part Number: IWR6843ISK-ODS Hi to all, I'm trying to run correctly the Unit Test of mmwavelink but I have problem even if I use the original bynaries. Some information in order to describe my environment: I'm using the mmwave_sdk_03_03_00_03 version I'm using a IWR6843ISK-ODS installed on a MMWAVEICBOOST I have correctly loaded the xwr68xx_ccsdebug.bin that i have found in the sdk I have loaded the two binaries xwr68xx_link_dss.xe674 and xwr68xx_link_mss.xer4f Then, I launch the test on DSS and the test seems blocked after a sensor Start. The console output shows: [C674X_0] Debug: ADCBUF Instance @0081a180 has been reopened successfully ****************************************** Debug: Launching the mmwaveLink ****************************************** Debug: Launching BIOS Debug: Launched the mmwaveLink Initialization Task Debug: CRC Channel @008012f8 has been opened successfully Debug: Launched the mmwaveLink Management Task Debug: BSS Mailbox Handle @00801be8 Debug: Disabling the device Debug: BSS Mailbox Handle @00801be8 Debug: Power on request successfully passed to the BSS Feature: mmWave Link Initialization: Passed Debug: BootupStatus = 8011f4 Debug: Finished get radarSS bootup status to BSS Feature: Get radarSS bootup status: Passed RF H/W Version : 02.00 RF F/W Version : 06.02.00.06.19.08.22 RF F/W Patch Version : 00.00.00.00.00.00.00 mmWaveLink Version: 01.02.05.16 Feature: Get mmWave Link Version: Passed Debug: Finished rlRfSetDeviceCfg Feature: Set Async event config: Passed Debug: Set HSI clock successfully Feature: Set HSI clock: Passed Debug: Finished rlDeviceConfigureAckTimeout Feature: Set ACK timeout to min value: Passed Debug: Finished rlDeviceConfigureAckTimeout Feature: Set ACK timeout to max value: Passed Debug: Finished rlDeviceConfigureAckTimeout Feature: Set ACK timeout: Passed Feature: mmWave Link Negative Test: Passed Debug: Die ID Status Lot no : 9323977, Wafer no: 2031649 Die cordinates in wafer. X : 41 , Y : 0 Feature: Get Device Die ID Status: Passed Debug: Finished set channel configurations to BSS Feature: Set mmWave Link Channel Config: Passed Debug: Finished setAdcOutConfig to BSS Feature: Set mmWave Link ADC Out Config: Passed Feature: mmWave Link Enable/Disable Calibration: Passed Debug: Init time calibration status [0x8000001e] Debug: RF start successfully Feature: mmWave Link RF Calibration: Passed Debug: Finished rlRfCalibDataStore Feature: mmWave Link Calibration Data Store config: Passed Feature: mmWave Link Enable/Disable Calibration: Passed Debug: Init time calibration status [0x80000012] Debug: Finished rlRfCalibDataRestore Feature: mmWave Link Calibration Data Restore config: Passed Debug: Init time calibration status [0x8000001e] Debug: RF start successfully Feature: mmWave Link RF Calibration: Passed Debug: Finished rlSetGpAdcConfig Feature: mmWave Link Set GPAdc: Passed Debug: Finished rlRfSetLdoBypassConfig Feature: mmWave Link Set LDO bypass: Passed Feature: mmWave Link Calib/Monitoring config: Passed Debug: Finished rlSetProfileConfig Feature: Set mmWave Link Profile config: Passed Debug: Finished rlRxGainTempLutGet Feature: Get mmWave Link RX Gain Temperature LUT config: Passed Debug: Finished rlTxGainTempLutGet Feature: Get mmWave Link TX Gain Temperature LUT config: Passed Debug: Finished rlRxGainTempLutSet Feature: Set mmWave Link RX Gain Temperature LUT config: Passed Debug: Finished rlTxGainTempLutSet Feature: Set mmWave Link TX Gain Temperature LUT config: Passed Debug: rlGetProfileConfig parameters matched with configured parameters Feature: Get mmWave Link Profile config: Passed Debug: Finished rlSetChirpConfig Feature: Set mmWave Link Chirp config: Passed Debug: Finished rlSetMultiChirpCfg Feature: Set mmWave Link Multi Chirp config: Passed Debug: Finished rlRfInterRxGainPhaseConfig Feature: Set mmWave Link Inter RX Gain/Phase config: Passed Debug : Temerature readings RX0 : 43 degree C, RX1 : 42 degree C, RX2 : 40 degree C, RX3 : 42 degree C TX0 : 44 degree C, TX1 : 43 degree C, TX2 : 46 degree C PM : 46 degree C, DIG0: 49 degree C Feature: Set mmWave Link Get Temperature Report: Passed Debug: Finished rlSetTestSourceConfig Debug: Finished rlTestSourceEnable Feature: Set mmWave Link Test Source config: Passed Debug: Finished rlSetFrameConfig Feature: Set mmWave Link Frame config: Passed Debug: rlGetFrameConfig parameters matched wilh configured parameters Feature: Get mmWave Link Frame config: Passed Debug: Finished rlRfSetPALoopbackConfig Feature: Enable mmWave Link PA Loop Back config: Passed Feature: Sensor Start: Passed Is there something wrong in my way of launch the unit test? Thanks, Stefano", + "partNumber" : " IWR6843ISK-ODS", + "allResponseList" : [ { + "contentId" : "3320084", + "userName" : "Yogesh Siraswar", + "rankPoints" : "4025", + "rankName" : "Expert", + "date" : "Apr 17, 2020 11:14 PM", + "userId" : "52043", + "content" : "Stefano, Will get back on this early next week. Thanks Yogesh" + }, { + "contentId" : "3322339", + "userName" : "Yogesh Siraswar", + "rankPoints" : "4025", + "rankName" : "Expert", + "date" : "Apr 21, 2020 5:53 AM", + "userId" : "52043", + "content" : "Hi Stefano, I am able to run both MSS and DSS link test successfully from SDK 3.3.0.3. Quick questions: 1) Are you running both test simultaneously? If yes try both independently. 2) Please do power on reset before executing DSS test. Let me know if you still observe issue. Thanks Yogesh" + }, { + "contentId" : "3322567", + "userName" : "Stefano Cirelli", + "rankPoints" : "180", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 9:26 AM", + "userId" : "6217792", + "content" : "Hi Yogesh, 1) I run only the DSS-test. If you see my log there are only [C674X_0] prints. 2) I press the NRST button on MMWAVEICBOOST before load the binaries. BR, Stefano" + }, { + "contentId" : "3322848", + "userName" : "Yogesh Siraswar", + "rankPoints" : "4025", + "rankName" : "Expert", + "date" : "Apr 21, 2020 1:31 PM", + "userId" : "52043", + "content" : "Hi Stefano, Did you flash ccsdebug.bin @C:\\ti\\mmwave_sdk_03_03_00_03\\packages\\ti\\utils\\ccsdebug\\xwr68xx_ccsdebug.bin before running the link test? Thanks Yogesh" + }, { + "contentId" : "3322949", + "userName" : "Stefano Cirelli", + "rankPoints" : "180", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 2:37 PM", + "userId" : "6217792", + "content" : "Hi Yogesh, yes I have loaded the ccsdebug.bin just before run the link test. In order to be sure of a cleaning environment I tried to re-install all the sdk3.3.0.03 but I continue to see the same block after the Sensor Start: Feature: Sensor Start: Passed In the /test/common/mmwave_test_common.c the next operations (before the next print) are: /* Wait for 1 frame */ Task_sleep(framePeriodicity*1U); /* sensor Stop */ if (MmwaveLink_sensorStop() < 0) { ... Then I suppose the execution is blocked inside the Task_sleep() or the MmwaveLink_sensorStop(). BR, Stefano" + }, { + "contentId" : "3323814", + "userName" : "Yogesh Siraswar", + "rankPoints" : "4025", + "rankName" : "Expert", + "date" : "Apr 22, 2020 5:52 AM", + "userId" : "52043", + "content" : "Hi Stefano, Seem strange. Are you able to run the MSS link test successfully? Yogesh" + }, { + "contentId" : "3323894", + "userName" : "Stefano Cirelli", + "rankPoints" : "180", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 7:07 AM", + "userId" : "6217792", + "content" : "Hi Yogesh, the MSS-test run correctly only if I launch it before the DSS-test. Instead if I lauch the MSS-test after the DSS-test, a block happens also in MSS-test. The MSS log is this: [Cortex_R4_0] Debug: ADCBUF Instance @0800d884 has been reopened successfully ****************************************** Debug: Launching the mmwaveLink ****************************************** Debug: Launched the mmwaveLink Initialization Task Debug: CRC Channel @08000b58 has been opened successfully Debug: BSS Mailbox Handle @08001428 Debug: Disabling the device Debug: BSS Mailbox Handle @08001428 Debug: Power on request successfully passed to the BSS Feature: mmWave Link Initialization: Passed Debug: Launched the mmwaveLink Management Task Debug: BootupStatus = 2 Debug: Finished get radarSS bootup status to BSS Feature: Get radarSS bootup status: Passed RF H/W Version : 02.00 RF F/W Version : 06.02.00.06.19.08.22 RF F/W Patch Version : 00.00.00.00.00.00.00 mmWaveLink Version: 01.02.05.16 Feature: Get mmWave Link Version: Passed Debug: Finished rlRfSetDeviceCfg Feature: Set Async event config: Passed Debug: Set HSI clock successfully Feature: Set HSI clock: Passed Debug: Finished rlDeviceConfigureAckTimeout Feature: Set ACK timeout to min value: Passed Debug: Finished rlDeviceConfigureAckTimeout Feature: Set ACK timeout to max value: Passed Debug: Finished rlDeviceConfigureAckTimeout Feature: Set ACK timeout: Passed Regards, Stefano" + }, { + "contentId" : "3323907", + "userName" : "Yogesh Siraswar", + "rankPoints" : "4025", + "rankName" : "Expert", + "date" : "Apr 22, 2020 7:22 AM", + "userId" : "52043", + "content" : "Hi Stefano, Do you have any other device to test? Thanks Yogesh" + }, { + "contentId" : "3323914", + "userName" : "Stefano Cirelli", + "rankPoints" : "180", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 7:29 AM", + "userId" : "6217792", + "content" : "My collegue try the test with a AWR1843BOOST and has the same problem. As additional information, I have tried to run the mmwavelink\\dfptest and all the test fail: ****************************************** [C674X_0] Debug: ADCBUF Instance @008164e0 has been opened successfully ****************************************** Debug: Launching the mmwaveLink ****************************************** Debug: Launching BIOS Debug: Launched the mmwaveLink Initialization Task Debug: CRC Channel @008012f8 has been opened successfully RF H/W Version : 02.00 RF F/W Version : 06.02.00.06.19.08.22 RF F/W Patch Version : 00.00.00.00.00.00.00 mmWaveLink Version: 01.02.05.16 Debug: Starting test number 1. Debug: Init time calibration status [0x8000001e] Debug: RF start successfully Error: rlRfDigMonPeriodicConfig retVal=250 --- Test 1 result: Feature: Test: Failed ------------------------------ Debug: Starting test number 1. No reconfiguration. Iteration number 1 Debug: Init time calibration status [0x8000001e] Debug: RF start successfully Error: rlRfDigMonPeriodicConfig retVal=250 --- Test 1 result: Feature: Test: Failed ------------------------------ Debug: Starting test number 1. No reconfiguration. Iteration number 2 Debug: Init time calibration status [0x8000001e] Debug: RF start successfully Error: rlRfDigMonPeriodicConfig retVal=250 --- Test 1 result: Feature: Test: Failed ------------------------------ Starting start/stop with reconfiguration ------------------------------ Debug: Starting test number 2. StartStop with reconfiguration, iteration number 1 Debug: Init time calibration status [0x8000001e] Debug: RF start successfully Error: rlRfDigMonPeriodicConfig retVal=250 --- Test 2 (reconfig) result: Feature: Test: Failed ------------------------------ Debug: Starting test number 3. StartStop with reconfiguration, iteration number 2 Debug: Init time calibration status [0x8000001e] Debug: RF start successfully Error: rlRfDigMonPeriodicConfig retVal=250 --- Test 3 (reconfig) result: Feature: Test: Failed ------------------------------ Debug: Starting test number 4. StartStop with reconfiguration, iteration number 3 Debug: Init time calibration status [0x8000001e] Debug: RF start successfully Error: rlRfDigMonPeriodicConfig retVal=250 --- Test 4 (reconfig) result: Feature: Test: Failed ------------------------------ Debug: Starting test number 1. StartStop with reconfiguration, iteration number 4 Debug: Init time calibration status [0x8000001e] Debug: RF start successfully Error: rlRfDigMonPeriodicConfig retVal=250 --- Test 1 (reconfig) result: Feature: Test: Failed ------------------------------ Debug: Starting test number 5. StartStop with reconfiguration, iteration number 5 Debug: Init time calibration status [0x8000001e] Debug: RF start successfully Error: rlRfDigMonPeriodicConfig retVal=250 --- Test 5 (reconfig) result: Feature: Test: Failed ------------------------------ Debug: Starting test number 6. StartStop with reconfiguration, iteration number 6 Debug: Init time calibration status [0x8000001e] Debug: RF start successfully Error: rlRfDigMonPeriodicConfig retVal=250 --- Test 6 (reconfig) result: Feature: Test: Failed ------------------------------ Debug: Starting test number 7. StartStop with reconfiguration, iteration number 7 Debug: Init time calibration status [0x8000001e] Debug: RF start successfully Error: rlRfDigMonPeriodicConfig retVal=250 --- Test 7 (reconfig) result: Feature: Test: Failed ------------------------------ Debug: Starting test number 8. StartStop with reconfiguration, iteration number 8 Debug: Init time calibration status [0x8000001e] Debug: RF start successfully Error: rlRfDigMonPeriodicConfig retVal=250 --- Test 8 (reconfig) result: Feature: Test: Failed ------------------------------ Debug: Starting test number 9. StartStop with reconfiguration, iteration number 9 Debug: Init time calibration status [0x8000001e] Debug: RF start successfully Error: rlRfDigMonPeriodicConfig retVal=250 --- Test 9 (reconfig) result: Feature: Test: Failed ------------------------------ Start/Stop test ended. Number of start/stop without reconfiguration 2 Number of start/stop with reconfiguration 9 Feature: Start/Stop Test: Failed ****************************************** Debug: MmwaveLink Test completed ****************************************** Maybe the problems could be related? Thanks, Stefano" + }, { + "contentId" : "3328770", + "userName" : "Stefano Cirelli", + "rankPoints" : "180", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 1:21 PM", + "userId" : "6217792", + "content" : "Hi Yogesh, I have an additional information. I have tried to put some debug printf into the code and I have found where the block happened. Inside the function MmwaveLink_sensorStop(void) in link_test.c the DSS is blocked inside the while loop. /* if frame stop async event is enable by rlRfSetDeviceCfg API, then wait for Frame stop async event */ if ((rfDevCfg.aeControl & 0x2) == 0x0) { while(gFrameStartStatus == 1U) { /* Sleep and poll again: */ Task_sleep(1); } } Regards, Stefano" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR6843ISK_2D00_ODS", "/support/sensors/f/1023/tags/MMWAVEICBOOST" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897958.json b/data/json/DLP/897958.json new file mode 100644 index 0000000000000000000000000000000000000000..6dd4544cee3080d62340d3bbaf106bef856216e0 --- /dev/null +++ b/data/json/DLP/897958.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "897958", + "reporterName" : "Xing He", + "rankPoints" : "360", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ34Z100: Not enable CALEN register bit in FULL ACCESS SEALED state", + "rankName" : "Prodigy", + "replies" : " 5", + "views" : " 32", + "queryText" : "Part Number: BQ34Z100 Hi Teams, It is an issue from my customer. BQ34Z100 will not enable CALEN register bit in FULL ACCESS SEALED state. This issue has happen when all the register R/W is done though I2C communication with MCU. Do you ever meet some similar problems? All your comments are highly welcomed. Thank you.", + "partNumber" : " BQ34Z100", + "allResponseList" : [ { + "contentId" : "3319608", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 17, 2020 3:13 PM", + "userId" : "1864278", + "content" : "The CONTROL_STATUS[CALEN] is a status bit. Your customer should not write to it. Did your customer use bqStuidio to double check? Andy" + }, { + "contentId" : "3320213", + "userName" : "Xing He", + "rankPoints" : "360", + "rankName" : "Prodigy", + "date" : "Apr 18, 2020 8:39 AM", + "userId" : "5996249", + "content" : "Hi Andy Actually, they only read the CALEN, After set CAL_ENABLE, reading the CANLEN, find can't calculate successfully. 1. Write Control(): 0x00 CAL_ENABLE 0x002D 2. Write Control(): 0x00 ENTER_CAL 0x0081 3. Read CONTROL_STATUS， if CALEN =0，repear 1,2,3 CONTROL_STATUS is always 0x4004. Besides they have use the bqStuidio to double check. Below is the situation use baStuidio, l write in Chinese. 目前遇到的情况，程序中对bq34z100 id的读取逻辑是先读取DEVICE_TYPE，然后写入Hardware Revision寄存器，在从Hardware Revision读取出来比对正常情况下，MCU可以读取34z100的DEVICE_NAME pylon_debug>ti2c @ id: 256 name: bq34z100-G1 bq34z100 id : 0x100 OK eeprom magic : 0x20200313 OK Test result:pass Command completed successfully! 用bqstudio连接后，进行电流校准，电流校准失败，bqstudio断开连接，关机重启都无法继续连接上 MCU读取设备名出现如下情况。 pylon_debug>ti2c @ id: 256 name: , bq34z100 id : 0xf0 NG eeprom magic : 0x20200313 OK Test result:fail They set the calculate current -1A . Can you help to find the reason for failing of the current calculate? Best regards, He Xing" + }, { + "contentId" : "3320828", + "userName" : "Xing He", + "rankPoints" : "360", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 6:47 AM", + "userId" : "5996249", + "content" : "Hi Team, Any feedback? Best Regards, He Xing" + }, { + "contentId" : "3321752", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 6:01 PM", + "userId" : "1864278", + "content" : "Does every unit fail the current calibration? I would suggest your customer program their srec file to a BQ34z100 EVM and follow the instructions in the EVM user's guide to do the current calibration. Andy" + }, { + "contentId" : "3324487", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 22, 2020 3:16 PM", + "userId" : "3528441", + "content" : "Taken offline." + } ], + "tags" : [ "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2b%2bBQstudio%2b_2300_BQ34Z100_2D00_G1", "/support/power-management/f/196/tags/bq34z100" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897965.json b/data/json/DLP/897965.json new file mode 100644 index 0000000000000000000000000000000000000000..b29f0fb0631476fdfceb560280360be197071e4e --- /dev/null +++ b/data/json/DLP/897965.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "897965", + "reporterName" : "Ian Wang", + "rankPoints" : "15535", + "resolutionStatus" : "", + "ticketName" : "TPS54335A: TPS54335", + "rankName" : "Genius", + "replies" : " 6", + "views" : " 25", + "queryText" : "Part Number: TPS54335A Hi Sir, Pls kindly hep for question for TPS54335, thanks. When we test TPS54335 with load change from 0A to 3A suddenly, Vout is drop, then TPS54335 w/o output. Pls advise if maybe something wrong here? Thanks. Thanks, Ian.", + "partNumber" : " TPS54335A", + "allResponseList" : [ { + "contentId" : "3320046", + "userName" : "Gerold Dhanabalan - Online Design Tools", + "rankPoints" : "8770", + "rankName" : "Expert", + "date" : "Apr 17, 2020 10:05 PM", + "userId" : "1132529", + "content" : "Hi Ian, Can you please confirm if Vout is regulating correctly under no load and full load - without applying a load transient? Regards, Gerold" + }, { + "contentId" : "3328412", + "userName" : "Ian Wang", + "rankPoints" : "15535", + "rankName" : "Genius", + "date" : "Apr 27, 2020 7:19 AM", + "userId" : "12993", + "content" : "Hi Gerold, Let me describe how we test, 1. connect electric LOAD to IC o/p, then with LOAD. 2. Power ON system 3. Observe voltage status when Power On moment. The same experiments are no problem in no load(0A) and half load(1.5A) But it drop when with full load (3A) Do you have idea what happen? Thanks, Ian." + }, { + "contentId" : "3330002", + "userName" : "Ian Wang", + "rankPoints" : "15535", + "rankName" : "Genius", + "date" : "Apr 28, 2020 6:57 AM", + "userId" : "12993", + "content" : "Hi Guys, Do you have any idea for this customer issue? Thanks, Ian." + }, { + "contentId" : "3330080", + "userName" : "Ryan Hu (BSR-MV)", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 28, 2020 8:24 AM", + "userId" : "4779079", + "content" : "Hi Ian, How about with a lower output current like 2.8A? Did the Vout ramp up again after the first drop down to zero? If ramp up, please capture the waveform and measure the hiccup time. Schematic looks ok. Please provide the layout snapshot if possible." + }, { + "contentId" : "3330085", + "userName" : "Ian Wang", + "rankPoints" : "15535", + "rankName" : "Genius", + "date" : "Apr 28, 2020 8:31 AM", + "userId" : "12993", + "content" : "Hi Ryan, Layout for reference," + }, { + "contentId" : "3330128", + "userName" : "Ryan Hu (BSR-MV)", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 28, 2020 9:30 AM", + "userId" : "4779079", + "content" : "Hi Ian, It's hard to read the layout. From the picture i don't know if any copper connected to the IC for the power dissipation, also i haven't found some components shown in the schematic. Firstly, I suggest to double confirm if the device was in OTP. Need your comments to my above questions. How about with a lower output current like 2.8A? Did the Vout ramp up again after the first drop down to zero? If ramp up, please capture the waveform and measure the hiccup time." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS54335A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897970.json b/data/json/DLP/897970.json new file mode 100644 index 0000000000000000000000000000000000000000..6133e3d7bd00232f0a0a9f1fdf3da3acdf561d15 --- /dev/null +++ b/data/json/DLP/897970.json @@ -0,0 +1,87 @@ +{ + "ticketNumber" : "897970", + "reporterName" : "Wei Zhang6", + "rankPoints" : "120", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ500212A: In the reference design of 500212A, the versions of Gerber files and CAD files of TIDA-00334 are different", + "rankName" : "Prodigy", + "replies" : " 9", + "views" : " 198", + "queryText" : "Part Number: BQ500212A Hi, In the reference design of 500212A, the versions of Gerber files and CAD files of TIDA-00334 are different (as shown below). The provided Gerber files are the E1 version, and the provided CAD files are the E2 version. Prepare for proofing test, could you please give the latest problem-free files with the same version (CAD files, Gerber files, and NC Drill files) to me？ Thanks. Kind regards, Hubery", + "partNumber" : " BQ500212A", + "allResponseList" : [ { + "contentId" : "3319580", + "userName" : "Bill Johns", + "rankPoints" : "46985", + "rankName" : "Mastermind", + "date" : "Apr 17, 2020 2:58 PM", + "userId" : "244698", + "content" : "Hello Hubery Note that allcompany Wireless Power device are NRND and support is very limited. TIDA-00334 is based on an older generation of IC, BQ500212A with high external parts count. We are reviewing the status of this design. A bettercompany Design to consider is the TIDA-00623 base on BQ50002A / 511A." + }, { + "contentId" : "3319725", + "userName" : "Wei Zhang6", + "rankPoints" : "120", + "rankName" : "Prodigy", + "date" : "Apr 17, 2020 4:20 PM", + "userId" : "6301982", + "content" : "Hello Bill Johns, Thank you for your reply. So now I want to know when you could finish the reviewing of this design, and give the needed files to me? Thank you. Kind regards, Hubery." + }, { + "contentId" : "3320632", + "userName" : "Bill Johns", + "rankPoints" : "46985", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 2:28 AM", + "userId" : "244698", + "content" : "Hi Hubery The PCB and Gerber file did not change between E1 and E2. This was a Bill of Material change only. See page 10 of test report, Document History list changes. E1 Gerber files are were use in the build and test of unit and are the best to use. Also this IC (BQ500212A) is NRND and the we are reviewing if this reference design is needed and should remain on the web." + }, { + "contentId" : "3320984", + "userName" : "Wei Zhang6", + "rankPoints" : "120", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 9:42 AM", + "userId" : "6301982", + "content" : "Hi Bill Johns, I found that exporting NC Drill files with the E2 version of the PCB did not match the E1 version of Gerber. The E1 version is missing NC Drill files. Could you please give the E1 version NC files to me? Thank you. Best wishes, Hubery" + }, { + "contentId" : "3321266", + "userName" : "Bill Johns", + "rankPoints" : "46985", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 1:52 PM", + "userId" : "244698", + "content" : "See attached file NC Drill.zip" + }, { + "contentId" : "3321339", + "userName" : "Wei Zhang6", + "rankPoints" : "120", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 2:24 PM", + "userId" : "6301982", + "content" : "Thank you. Best regard, Hubery" + }, { + "contentId" : "3324382", + "userName" : "Wei Zhang6", + "rankPoints" : "120", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 2:18 PM", + "userId" : "6301982", + "content" : "Hi, There are dislocations between the NC Drill files you sent and the Drill Guide layer of the Gerber files of the E1 version (as shown below). Could you please solve this problem? Thank you. Best regards, Hubery" + }, { + "contentId" : "3325148", + "userName" : "Gautham", + "rankPoints" : "10595", + "rankName" : "Genius", + "date" : "Apr 23, 2020 2:42 AM", + "userId" : "3470306", + "content" : "Hi Hubery, Please find the gerber and drill files attached on here. Let us know if you have any questions. Regards, Gautham Gerber_NCDRILL.zip" + }, { + "contentId" : "3325467", + "userName" : "Wei Zhang6", + "rankPoints" : "120", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 10:00 AM", + "userId" : "6301982", + "content" : "Hi Gautham, Thank you for your reply. But I got new problems when opening the Gerber files and NC drill files, how are these 8 options set (as shown below)? Thank you. Best regards, Hubery" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ500212A", "/support/power-management/f/196/tags/NC%2bDrill%2bfiles", "/support/power-management/f/196/tags/CAD%2bFILES", "/support/power-management/f/196/tags/500212A", "/support/power-management/f/196/tags/gerber%2bfiles", "/support/power-management/f/196/tags/TIDA_2D00_00334" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897980.json b/data/json/DLP/897980.json new file mode 100644 index 0000000000000000000000000000000000000000..d69f590c6d47ec4710fa4a9a10aa87be1a4070b5 --- /dev/null +++ b/data/json/DLP/897980.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "897980", + "reporterName" : "Simone Mazzer", + "rankPoints" : "35", + "resolutionStatus" : "Resolved", + "ticketName" : "UCC28180: clarifications about the M3 gain and on the signals transfers", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 36", + "queryText" : "Part Number: UCC28180 Hello I recall this old discussion for which no answer was given regarding the nonlinear gain parameter M3 introduced and calculated in the datasheet. Its origin is particularly mysterious: I would like to point out two critical points: The piecewise interpolant function reported in datasheet (latest review D) / application notes seems to be totally wrong. See following pictures: The plotted PW Function M3(V_COMP) I would not agree at all with the transfer function reported in datasheet. This point is the most important one. Unfortunately, to clarify my question, I'll have to go into a brief mathematical discussion of the PFC. Since is not an easy task to accomplish by writing in plain text, I've prepared a PDF document...I'd appreciate it if you could take a look at it. 2870.TI_ucc28180.pdf Thank you in advance. Simone", + "partNumber" : " UCC28180", + "allResponseList" : [ { + "contentId" : "3319749", + "userName" : "Simone Mazzer", + "rankPoints" : "35", + "rankName" : "Prodigy", + "date" : "Apr 17, 2020 4:42 PM", + "userId" : "4438938", + "content" : "I would also like to point out that the M1M2(VCOMP) curve reported in the datasheet and the one graphed in the .xls design file file downloadable in the appropriate section of the site (/lit/zip/sluc506 , are in disagreement at leaest for high values of VCOMP. I think that all these curve should be reviewed and clarified. EDIT: Sorry, please don't consider this. I've looked in detail at the excel sheet, and the curve plotted in this last one was for a different frequency with respect to the one reported in the datasheet. My first question instead is valid, I kindly await your feedback. Simone" + }, { + "contentId" : "3321046", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 10:59 AM", + "userId" : "1139254", + "content" : "Hi Simone, It will take a couple of days to review the curves, I hope to be able to give you an update then. Regards Peter" + }, { + "contentId" : "3323962", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 8:15 AM", + "userId" : "1139254", + "content" : "Hi Simone, I have sent you a internal contact request so we can keep working on this. The original design team have moved to new roles since the release of this part and it will take more time to work through this. I will close this post and we can stay in contact by email. Regards Peter" + }, { + "contentId" : "3323992", + "userName" : "Simone Mazzer", + "rankPoints" : "35", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 8:47 AM", + "userId" : "4438938", + "content" : "Hi Peter, I've just accepted your request. Thank you. Simone" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC28180" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897989.json b/data/json/DLP/897989.json new file mode 100644 index 0000000000000000000000000000000000000000..6aba7759d3adccdd36eea86517536c2719b690c8 --- /dev/null +++ b/data/json/DLP/897989.json @@ -0,0 +1,87 @@ +{ + "ticketNumber" : "897989", + "reporterName" : "Julio AFA", + "rankPoints" : "2455", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS2491: Unexpected shutdown?", + "rankName" : "Intellectual", + "replies" : " 9", + "views" : " 66", + "queryText" : "Part Number: TPS2491 Team, The description in the datasheet indicates to use a gate drive resistor of 10 Ohms if CISS is above 200pF. The MOSFET we have chosen is the FDP036N10A which has a very large CISS (5485pF). For this size of MOSFET, is it necessary to have a lower gate drive resistance? The second query we have is related to an unexpected shutdown that we are seeing. After the FET is fully enhanced, our system begins to draw power and we observe the gate on the FET start to drop unexpectedly. This is not a hard turn-off as seen in other situations. The gate takes about 1.5msec to drop to a point where current is shut off. Do you have any suggestions for what may be happening here?", + "partNumber" : " TPS2491", + "allResponseList" : [ { + "contentId" : "3320139", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 18, 2020 1:38 AM", + "userId" : "4743883", + "content" : "Hi Julio, 10 Ohm gate drive resistor is enough. Can you please share me the schematic and filled up design sheet for review. The design sheet is available at /product/TPS2490/toolssoftware What is the type of load ? Is it pulsed in nature which momentarily exceeding the set current limit ? Can you share the test waveforms Vin, Vout, Timer, GATE Vout, GATE, Timer, input current Best Regards, Rakesh" + }, { + "contentId" : "3321409", + "userName" : "Matthew Swanson", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 2:54 PM", + "userId" : "4361114", + "content" : "Rakesh, I can comment as this was the issue that I raised. I've attached the schematic and some scope captures below: The load is a ramp of current up to a steady-state value. The issue occurs during the ramp. I have a few scope captures that show the waveforms you are looking for. The first shot below shows an overview of the issue with the input and output voltage (yellow is input voltage, green is output voltage, blue is input current). The gate voltage (yellow) can be seen in this next image to drop just before the output voltage drops (green). The next scope shot includes the timer cap voltage and shows the same condition (yellow is timer capacitor voltage, green is output voltage, blue is input current). Since the timer capacitor is not pulsing when the controller first shuts off, I'm assuming it is not in a current limit or power limit scenario. I have been able to run in other scenarios with higher current than what is shown here without the controller shutting down. In this case, the controller seems to be shutting down near 5A with the current limit at 25A. Is there a state of the controller that would allow the gate to drop in such a slow manner? Thanks for the confirmation on the gate drive resistance. Matthew Swanson" + }, { + "contentId" : "3321412", + "userName" : "Matthew Swanson", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 2:55 PM", + "userId" : "4361114", + "content" : "Rakesh, Adding the completed worksheet as well. 3007.TPS249x_8x_Design_Calculator_REV_B.xlsx Matt" + }, { + "contentId" : "3322390", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 6:36 AM", + "userId" : "4743883", + "content" : "Hi Matt, Thanks for the details. The controller pulls down the GATE for overload event. Why there is so much noise on the input voltage ? Have you checked by shorting L13 and L39 ? What load is used for testing ? Is it e-load ? In your test waveform, to which node (pink) the channel-4 corresponds to ? Best Regards, Rakesh" + }, { + "contentId" : "3322774", + "userName" : "Matthew Swanson", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 12:57 PM", + "userId" : "4361114", + "content" : "Rakesh, Thank you for the response. The red signal is a high-frequency load that I was monitoring and is the source of the current draw on the input. The final load is a resistor. I have not tried shorting L39 as it is blocking switching noise from a higher power converter downstream. The output side of the controller (P60V) net has about 66uF of bulk shown on a different page. I have also not tried shorting the input common-mode chokes. Most of the noise is due to my sensing method. I had a rather large loop on my probe when I was measuring. I apologize for the fuzzy plots. You've hit on one of the thoughts we have about this issue. It is placed in close proximity to a high-power switching converter that drives the load. From what I understand of the part, the 'timer' capacitor charges when in current limit or in power limit mode. However, at the initial drop in the gate voltage, the timer capacitor is not charging. i.e. I assume the part does not think it is in power limit or current limit mode. Have you any experience with these parts exhibiting strange behavior in the presence of noise? If so, would you recommend any changes to our design that may help? I have attempted adding extra bulk at the input near R928 (per datasheet recommendation) and a small capacitor in parallel with R984. Thanks for the help! Matthew Swanson" + }, { + "contentId" : "3323239", + "userName" : "Matthew Swanson", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 5:52 PM", + "userId" : "4361114", + "content" : "Rakesh, One other plot that may be of use is the following one I took with the output ramping very slowly. In the image below, the gate (yellow) can be seen to drop very slowly in the time span of ~2 seconds. After this, the gate snaps back up to near where it should be and repeats the sequence. The output voltage is in green, the input current is in blue and the 'timer' capacitor is in red. This seems to indicate that something is either drawing down the gate or the gate is no longer being charged by the controller during this time frame. Thanks! Matthew Swanson" + }, { + "contentId" : "3323783", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 5:03 AM", + "userId" : "4743883", + "content" : "Hi Matt, In case of pulsed load at the output, the Vout ripple can couple to the GATE of the external MOSFET through Cgs and can load the GATE node. Can you add capacitance at the source of the MOSFET (100uF electrolytic + 1uF ceramic) and check. If it does not help, add 10nF between GATE to source and check. Best Regards, Rakesh" + }, { + "contentId" : "3327517", + "userName" : "Matthew Swanson", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 8:18 PM", + "userId" : "4361114", + "content" : "Rakesh, Thanks for the tip! This got us moving in the right direction. We found that current was leaking through the Zener D75 and also had an internal path through the hot-swap controller (U231) due to the noise from our downstream power stages. This leakage exceeded the 22uA (nominal) capability of the hot-swap controller. Our fix was to add a 100pF in parallel with D75 and a 220pF from pin 8 of the hot-swap controller (U231) to LGND. Have a great weekend! Matthew Swanson" + }, { + "contentId" : "3328297", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 5:19 AM", + "userId" : "4743883", + "content" : "Hi Matt, Good to hear that. Let me know if you have any more questions. Regards, Rakesh" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS2491" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/897990.json b/data/json/DLP/897990.json new file mode 100644 index 0000000000000000000000000000000000000000..1bae0f11d58084869db7194c9bc143fb0b4738b6 --- /dev/null +++ b/data/json/DLP/897990.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "897990", + "reporterName" : "Jeremy Hills", + "rankPoints" : "40", + "resolutionStatus" : "", + "ticketName" : "TPS3103: Issues with /RESET output on TPS3103", + "rankName" : "Prodigy", + "replies" : " 6", + "views" : " 29", + "queryText" : "Part Number: TPS3103 I'm hoping you can help - we've seen some strange behaviour from the TPS3103 chip. Although this state is rare we have measured, with a DVM, that the output voltage is measuring at 0.97V and holding the device in a reset state even though Vdd = 3.27V /MR = 3.26V . This effect recovers and then hasn't occurred since but would like to understand possible reasons for this behaviour. Any help appreciated.", + "partNumber" : " TPS3103", + "allResponseList" : [ { + "contentId" : "3320031", + "userName" : "Marcoo Z", + "rankPoints" : "12020", + "rankName" : "Genius", + "date" : "Apr 17, 2020 9:51 PM", + "userId" : "4617794", + "content" : "Hi Jeremy, Can you share your schematic?" + }, { + "contentId" : "3320214", + "userName" : "Jeremy Hills", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 18, 2020 8:42 AM", + "userId" : "6319113", + "content" : "No problem -please find below" + }, { + "contentId" : "3324453", + "userName" : "Jeremy Hills", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 2:55 PM", + "userId" : "6319113", + "content" : "H Marcoo did you have any update on this one? thanks" + }, { + "contentId" : "3324820", + "userName" : "Marcoo Z", + "rankPoints" : "12020", + "rankName" : "Genius", + "date" : "Apr 22, 2020 7:14 PM", + "userId" : "4617794", + "content" : "Hi Jeremy, I do not see an issue with the schematic. I would isolate the TPS3103 and see if you see the issue isolated. So TPS3103 + R83. Is there a chance that the RESET line is being pulled down externally? Like leakage through another pin?" + }, { + "contentId" : "3324867", + "userName" : "Jeremy Hills", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 8:10 PM", + "userId" : "6319113", + "content" : "Thanks, We can try this, the fact it seems to come and go with very distinct voltage level differences makes me doubt a passive type of failure- but worth ruling out for sure. One aspect we were unsure of is the /MR input voltage. If this went slightly higher than Vdd, either transient or DC, could we see behaviour like this?" + }, { + "contentId" : "3324961", + "userName" : "Marcoo Z", + "rankPoints" : "12020", + "rankName" : "Genius", + "date" : "Apr 22, 2020 10:39 PM", + "userId" : "4617794", + "content" : "Hi Jeremy, Jeremy Hills One aspect we were unsure of is the /MR input voltage. If this went slightly higher than Vdd, either transient or DC, could we see behaviour like this? The MR is only rated up to VDD. We do not recommend having an MR higher than VDD. I am unsure on what happens if MR > VDD. If you suspect this might happen, we do have devices where MR and VDD should be independent." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS3103" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898000.json b/data/json/DLP/898000.json new file mode 100644 index 0000000000000000000000000000000000000000..a7720c30d0f479069a9f2ae1ebb167589e524023 --- /dev/null +++ b/data/json/DLP/898000.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "898000", + "reporterName" : "Praveen Pitchai", + "rankPoints" : "60", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ27750: Number of Reset Register", + "rankName" : "Prodigy", + "replies" : " 6", + "views" : " 47", + "queryText" : "Part Number: BQ27750 Hello, I am trying to find out if there are any registers in the part which stores the number of resets taken by the device? I see that the Operation Status has a BIT 24: Initialization after Full Reset. Does this Bit get enabled when the device comes out of reset? Thank you, Sincerely, Praveen", + "partNumber" : " BQ27750", + "allResponseList" : [ { + "contentId" : "3319990", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 17, 2020 8:55 PM", + "userId" : "1864278", + "content" : "Hi Praveen, See my answers below. I am trying to find out if there are any registers in the part which stores the number of resets taken by the device? Yes. However, these registers are not open to customers. I see that the Operation Status has a BIT 24: Initialization after Full Reset. Does this Bit get enabled when the device comes out of reset? That bit should clear when the initialization is complete. Andy" + }, { + "contentId" : "3320011", + "userName" : "Praveen Pitchai", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 17, 2020 9:21 PM", + "userId" : "5993778", + "content" : "Hello Andy, Thank you for the response: Is there no way to access these registers to find out if there was a reset? When you say, \"That bit should clear when the initialization is complete.\", what exactly does this mean? Does it mean that when the gauge comes back on, and we try to read the Operation Status register this Bit will be cleared? Thank you, Sincerely, Praveen" + }, { + "contentId" : "3321773", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 6:22 PM", + "userId" : "1864278", + "content" : "Hi Praveen, The one byte at the data flash address 0x4209 should be the number of full resets recorded by the gauge device. Note that you need to enable Lifetimes. Andy" + }, { + "contentId" : "3323558", + "userName" : "Praveen Pitchai", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 11:28 PM", + "userId" : "5993778", + "content" : "Hello Andy, Thank you for your response. This register does give me the reset count. A follow on question: 1. If the gauge takes a soft reset, does this register increment? Are there any other registers we can read from the data flash that tells us, if a soft reset occurred, vs a hard reset? Thank you, Sincerely, Praveen" + }, { + "contentId" : "3323789", + "userName" : "Praveen Pitchai", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 5:21 AM", + "userId" : "5993778", + "content" : "Also, is this only one byte? What happens when the number of resets > 255? Does the register roll over?" + }, { + "contentId" : "3324917", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 9:22 PM", + "userId" : "1864278", + "content" : "That register should increment when a RESET command is sent or a POR occurs. Also, the max value of that register is 255. It will not roll over. I suggest double check using an EVM. Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ27750" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898005.json b/data/json/DLP/898005.json new file mode 100644 index 0000000000000000000000000000000000000000..a296e96e7001068ff4a0560b732fd2270459a03f --- /dev/null +++ b/data/json/DLP/898005.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898005", + "reporterName" : "Alejandro Cabrerizo", + "rankPoints" : "20", + "resolutionStatus" : "", + "ticketName" : "BQ24195: BQ24195 Not charging", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 22", + "queryText" : "Part Number: BQ24195 Hello, I recently built a prototype board where the BQ24195 charges a Lion cell and also boosts the voltage to be outputted. I can write and read its registers from the MCU but I am unable to get it to start charging. Registers: register 0: 10 register 1: 25 register 2: 52 register 3: 17 register 4: 174 register 5: 154 register 6: 3 register 7: 75 register 8: 4 register 9: 4 Any clue on why is that happening? Schematic: https://imgur.com/15RwhoF Thank you", + "partNumber" : " BQ24195", + "allResponseList" : [ { + "contentId" : "3320105", + "userName" : "Ning T", + "rankPoints" : "15365", + "rankName" : "Genius", + "date" : "Apr 17, 2020 11:54 PM", + "userId" : "145100", + "content" : "Hi, Please visit /support/power-management/f/196/t/877725 for BQ2419X: Schematic Review and PCB Layout Design Tips and /support/power-management/f/196/t/875388 for BQ2419X/2429x FAQs. BQ24195 is similar to BQ24190. Please check the register readings and see if there's any faults or DPM etc , especially for REG07, REG08 and REG09. Thanks, Ning." + }, { + "contentId" : "3320172", + "userName" : "Alejandro Cabrerizo", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 18, 2020 4:37 AM", + "userId" : "6326899", + "content" : "Hi, Thank you for answering. It seems like there are no faults and it is not in DMP mode (The register values when the IC should start charging are posted in the original post) From the schematic checklist, there are 2 things that seems like I didn't follow: 1. The D+ and D- pins are floating instead of connected together. 2. The OTG pin is always pulled HIGH. Do you think that any of those things might prevent the IC from starting the charge cycle? Thank you" + }, { + "contentId" : "3326608", + "userName" : "Ning T", + "rankPoints" : "15365", + "rankName" : "Genius", + "date" : "Apr 24, 2020 4:23 AM", + "userId" : "145100", + "content" : "Hi, Not sure yet. What are your test conditions such as VBUS (voltage at VBUS pin), VBAT (voltage at BAT pin), IBAT, VSYS, ISYS? Thanks, Ning." + } ], + "tags" : [ "/support/power-management/f/196/tags/bq24195" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898017.json b/data/json/DLP/898017.json new file mode 100644 index 0000000000000000000000000000000000000000..fc9e2d43dacdd3a2a12fef00d2433f196da08ff5 --- /dev/null +++ b/data/json/DLP/898017.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "898017", + "reporterName" : "Domenic Diolaiti", + "rankPoints" : "30", + "resolutionStatus" : "", + "ticketName" : "TPS22990: TPS22990 circuit design related questions.", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 26", + "queryText" : "Part Number: TPS22990 I am using the TPS22920 load switch part in a design of mine. That switch is difficult to solder, and seems prone to damage due to reverse current from Vout > Vin on shutdwon. So I decided to replace it with the TPS22990 load switch, and I have some questions: 1) I want to keep the rise time as close as possible between the two designs. I find myself using values of between 33nF-47nF for the CT part. So I assume that a long rise time could affect the thermal aspect of the TPS22990, since the internal FET has an SOA that needs to be respected. How would I go about determining if this is an issue? 2) Regarding reverse current due to body diode, I see that the TPS22990 does not have an absolute maximum rating which states that that Vout <= Vin. So does that mean that it is less susceptible to reverse current through the body diode? (I only need to verify the current in a power shutdown condition.) How much current can the body diode take before damage? Do I need to add extra bleeders in order to mitigate this issue? Can I use the PG pin to bleed, and if so what is the maximum current that it can sink?", + "partNumber" : " TPS22990", + "allResponseList" : [ { + "contentId" : "3319969", + "userName" : "Andy Robles", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 17, 2020 8:32 PM", + "userId" : "6043129", + "content" : "Hi Domenic, Welcome to E2E! Before going into the questions I would like to mention that both of these devices do not have a reverse current blocking feature. Without reverse current blocking both of devices can be damaged by the effects of VOUT bring greater than VIN. For this reason we recommend using an input capacitor that is greater than the output capacitor. A 10 to 1 ratio is typically recommended in the datasheet. Regarding the questions on the TPS22990, when using a large CT capacitor to turn on the device onto a large capacitive load, the power dissipation will cause the device to heat up. The longer the rise time, the longer the device will be exposed to this power dissipation. As this device was not tested with higher CT capacitance than the ones listed in the datasheet, the only indications would be size of the output capacitance and the load current. Additionally the device would have to be tested to observe the behavior under your loading conditions. The TPS22990 will also be susceptible to damage by reverse current through the device for which the 10:1 ratio on the input to output capacitor is recommended. Adding extra bleeders could be an option to mitigate the device, but the 10:1 ratio from input to output capacitor should be enough to eliminate this problem during power down. The PG pin was not tested to sink current from the output, so it would not be recommended. What is the output capacitance of the device? What is the input capacitance? Best regards, Andy Robles" + }, { + "contentId" : "3320102", + "userName" : "Domenic Diolaiti", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 17, 2020 11:52 PM", + "userId" : "5257873", + "content" : "Hi Andy, Thanks for the answers. So the question of how much capacitance does not have a clear cut answer. We have a massive plane with tons of capacitors spread all around. We also have some local capacitance at the input of the TPS22920 device. So overall on the PCB Cin > 10x Cout, but locally there are about equal. I have not performed an impedance simulation to see the effects of the ratio. However it is my understanding that the body diode could handle some current for some time, no? Here is what we see, Vout vs Vin" + }, { + "contentId" : "3321803", + "userName" : "Domenic Diolaiti", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 6:42 PM", + "userId" : "5257873", + "content" : "Hi, So i think i understand now, given that there is a slew rate the inrush current will be constant during startup. Even if I have 30-60nF of CT value, and output capacitance of 100uF-200uF on a 3.3V rail, the inrsuh current would only be in the hundreds on mA. I would assume that since the device can handle 10A @125oC Junction, even if my ambient temperature is 85oC, a few hundred mA at startup would not be an issue. Thanks" + }, { + "contentId" : "3321934", + "userName" : "Andy Robles", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 20, 2020 8:34 PM", + "userId" : "6043129", + "content" : "Hi Domenic, For this device, the integrity of the body diode was not tested. We would not be able to guarantee that the device won't get damaged when VOUT>VIN. A device with reverse current blocking would be needed in order to guarantee the device won't get damaged. What are some key care-about characteristics for the load switch so I may suggest a device with reverse current blocking? You may also visit the product page on this link, and select reverse current blocking on the function tab to view the devices with reverse current blocking in our portfolio. Let me know if you have any questions. Andy Robles" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS22920", "/support/power-management/f/196/tags/TPS22990" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898019.json b/data/json/DLP/898019.json new file mode 100644 index 0000000000000000000000000000000000000000..cbc3b1680a5acd1227820b7c5c3e611dc544dc89 --- /dev/null +++ b/data/json/DLP/898019.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "898019", + "reporterName" : "Can Kosar", + "rankPoints" : "60", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS65150: Ref. voltage much lower than in specs: All output voltages at 60%", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 24", + "queryText" : "Part Number: TPS65150 I'm designing a board including a LCD power BIAS supply using TPS65150 based on its reference design. However all output voltages are about 60-70% of the calculated values. I measure on the reference voltage pin Vref 0.768V , much lower than the specified as 1.213V in the datasheet. Calculated Measured VGH 23 13.2 VGL -6 -4.1 VA 9.6 6.7 VCOM 2.9 2.9 Input voltage Vin=3.3V I only changed the feedback resistor values in the reference design to meet my voltage requirements: What is the reason of this heavy drop of reference voltage and how can I fix it?", + "partNumber" : " TPS65150", + "allResponseList" : [ { + "contentId" : "3319821", + "userName" : "Aaron Goodson", + "rankPoints" : "5630", + "rankName" : "Expert", + "date" : "Apr 17, 2020 5:36 PM", + "userId" : "4719001", + "content" : "Hi, I have notified our expert regarding this topic. Please expect a response by 4/22/20. Thanks, Aaron" + }, { + "contentId" : "3322061", + "userName" : "Liaqat Khan", + "rankPoints" : "7780", + "rankName" : "Expert", + "date" : "Apr 20, 2020 11:04 PM", + "userId" : "291526", + "content" : "Hello, I reviewed schematics and see couple of issues with it. 1. A 220nF capacitor is required from REF pin 20 to GND not from FBN to GND as your schematics shows. 2. Since LCD_AVDD is 9.6V and it appears that your LCD_VGH is ~19V (although you mentioned it to be 23V in the table above), you will likely need to use two stages of positive charge pump (charge pump tripler circuit to achieve the proper LCD_VGH voltage instead of a charge pump doubler that you currently have). Please see figure 34 in the datasheet for a charge pump trippler configuration. Please make the change I suggested in point 1 above first and see if its impact. As a second step, use charge pump trippler circuit and as described in my point 2. These two suggestions should resolve the issues with your design. Kind Regards, Liaqat" + }, { + "contentId" : "3324798", + "userName" : "Can Kosar", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 6:45 PM", + "userId" : "5247701", + "content" : "Hello Liaqat, thank you very much for inspecting the schematics and finding my fault. The point 1 resolved my issue! I was just too blind and put the capacitor in the wrong place. Now I fixed it and get correct gate voltages. But one more question: I don't understand how to configure the VGH. You said, I have a \"charge pump doubler\". So V_GH=2*V_VS ? What part of circuit does that? Best regards Can" + }, { + "contentId" : "3324962", + "userName" : "Liaqat Khan", + "rankPoints" : "7780", + "rankName" : "Expert", + "date" : "Apr 22, 2020 10:40 PM", + "userId" : "291526", + "content" : "Hello Can, Configuring VGH depends on your VGH voltage needs (set by the resistor dividers 1M and 68K at pin 12 and please see datasheet on how to calculate these resistor divider) and LCD_AVDD voltage from boost converter. A single stage of charge pump (two diodes two capacitors) as shown on you schematics would theoretically generate 2*LCD_AVDD but there are voltage drop across diodes and internal switches so actual charge pump output voltage will be somewhat lower, say approx 2V lower. I believe your LCD_AVDD is set to ~9.6V so you will get approx. (2*9.6)-2V at the charge pump output no matter what you set with the resistor divider. To get any higher voltage, you will need to use one more stage of charge pump as shown in figure 34 of the datasheet. Kind Regards, Liaqat" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS65150", "/support/power-management/f/196/tags/reference%2bvoltage", "/support/power-management/f/196/tags/power%2bsupply", "/support/power-management/f/196/tags/voltage%2bdrop" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898025.json b/data/json/DLP/898025.json new file mode 100644 index 0000000000000000000000000000000000000000..701f0008adf315460107681ed05e18423654f10e --- /dev/null +++ b/data/json/DLP/898025.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "898025", + "reporterName" : "Kuerbis", + "rankPoints" : "2500", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS65910: The recommended connection for AM3352 RTC feature disabled mode", + "rankName" : "Intellectual", + "replies" : " 4", + "views" : " 31", + "queryText" : "Part Number: TPS65910 Hi Team, Would you please teach me the recommended connection for AM3352 RTC feature disabled mode? The device is as below. AM3352BZCZ60 TPS65910AA1RSL I checked the following document. But I couldn’t AM335x RTC related pin connections and the connection with TPS65910AA1 for RTC feature disabled mode. TPS65910Ax User's Guide for AM335x Processors http://www.tij.co.jp/jp/lit/ug/swcu093f/swcu093f.pdf AM335x Schematic Checklist /.../sprabn2a.pdf TPS65910x Schematic Checklist /.../swca139b.pdf Thanks and Best regards, Kuerbis", + "partNumber" : " TPS65910", + "allResponseList" : [ { + "contentId" : "3319953", + "userName" : "Brian Berner", + "rankPoints" : "26215", + "rankName" : "Mastermind", + "date" : "Apr 17, 2020 8:18 PM", + "userId" : "1859421", + "content" : "Kuerbis, When the RTC is un-used, the TPS65910 Schematic Checklist says how to terminate the pins of the PMIC. OSC32KIN = GND (internal RC wiring) OSC32KOUT = Floating (internal RC wiring) VRRTC = Connect to a 2.2-µF filter capacitor (cannot be left NC) GPIO_CKSYNC = Floating CLK32KOUT = Floating I cannot tell you how to wire the AM3352 for RTC disable using TPS65910x, so I will need to re-assign this post to the Sitara processor team." + }, { + "contentId" : "3320177", + "userName" : "Biser Gatchev-XID", + "rankPoints" : "391175", + "rankName" : "Guru", + "date" : "Apr 18, 2020 4:59 AM", + "userId" : "1607373", + "content" : "Hi, On AM335x side the required connections are listed in the AM335x Schematic Checklist (/lit/an/sprabn2a/sprabn2a.pdf), section 2.14, Table 2, and section 2.14.1." + }, { + "contentId" : "3320676", + "userName" : "Kuerbis", + "rankPoints" : "2500", + "rankName" : "Intellectual", + "date" : "Apr 20, 2020 3:35 AM", + "userId" : "22357", + "content" : "HI Biser, AM335x Schematic Checklist used have section 2.14, Table 2, and section 2.14.1 for RTC. But it was removed in the latest version. So i'm in trouble Would you please tell me which document should I refer to?. Thanks and Best regards, Kuerbis" + }, { + "contentId" : "3327153", + "userName" : "Kuerbis", + "rankPoints" : "2500", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 2:56 PM", + "userId" : "22357", + "content" : "HI Biser, Do you have any update for this? Thanks and Best regards, Kuerbis" + } ], + "tags" : [ "/support/power-management/f/196/tags/AM3352", "/support/power-management/f/196/tags/TPS65910" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898055.json b/data/json/DLP/898055.json new file mode 100644 index 0000000000000000000000000000000000000000..f8465c5f8dc93c492ea367125ae5f965fe616a54 --- /dev/null +++ b/data/json/DLP/898055.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "898055", + "reporterName" : "digilog", + "rankPoints" : "70", + "resolutionStatus" : "", + "ticketName" : "OPT3101EVM: No data stream when running Latte", + "rankName" : "Prodigy", + "replies" : " 12", + "views" : " 62", + "queryText" : "Part Number: OPT3101EVM I am having problem with streaming data from my OPT3101EVM kit. I am able to start Latte and it finds the EVM device OK but when I click on the \"Start Capture\" button I do not get any data streaming and after a couple of seconds the Log window displays: \"Capture data from EVM timed out -- no data received from EVM. Stopping capture\" I have tried everything as specified in the user manual and Windows 7 correctly displays the Control and Data com ports when the EVM is plugged in. Apart from an \"operation Flash read Failed\" error Latte does not report any other errors when loading. What am I missing here. I have tried everything I can think of and still no data stream.", + "partNumber" : " OPT3101EVM", + "allResponseList" : [ { + "contentId" : "3321235", + "userName" : "Alex Bhandari-Young", + "rankPoints" : "15670", + "rankName" : "Genius", + "date" : "Apr 20, 2020 1:30 PM", + "userId" : "4691324", + "content" : "Hi, When you open latte it will open a black command prompt window that will stay in the background. Have you checked that for errors? If any errors printing there can you supply these? Best, Alex" + }, { + "contentId" : "3321996", + "userName" : "digilog", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 9:40 PM", + "userId" : "95145", + "content" : "Hi Alex, No there are no errors reported. See window contents below. I have also installed the EVM on another Windows 7 computer and I get the same result. [1240] PyInstaller Bootloader 3.x [1240] LOADER: executable is C:\\Program Files\\customer organization\\Latte\\bin\\latte. exe [1240] LOADER: homepath is C:\\Program Files\\customer organization\\Latte\\bin [1240] LOADER: _MEIPASS2 is NULL [1240] LOADER: archivename is C:\\Program Files\\customer organization\\Latte\\bin\\latte .exe [1240] LOADER: No need to extract files to run; setting extractionpath to homepa th [1240] LOADER: SetDllDirectory(C:\\Program Files\\customer organization\\Latte\\bin) [1240] LOADER: Already in the child - running user's code. [1240] LOADER: Python library: C:\\Program Files\\customer organization\\Latte\\bin\\pyth on27.dll [1240] LOADER: Loaded functions from Python library. [1240] LOADER: Manipulating environment (sys.path, sys.prefix) [1240] LOADER: sys.prefix is C:\\PROGRA~1\\TEXASI~1\\Latte\\bin [1240] LOADER: Setting runtime options [1240] LOADER: Initializing python [1240] LOADER: Overriding Python's sys.path [1240] LOADER: Post-init sys.path is C:\\Program Files\\customer organization\\Latte\\bi n [1240] LOADER: Setting sys.argv [1240] LOADER: setting sys._MEIPASS [1240] LOADER: importing modules from CArchive [1240] LOADER: extracted struct [1240] LOADER: callfunction returned... [1240] LOADER: extracted pyimod01_os_path [1240] LOADER: callfunction returned... [1240] LOADER: extracted pyimod02_archive [1240] LOADER: callfunction returned... [1240] LOADER: extracted pyimod03_importers [1240] LOADER: callfunction returned... [1240] LOADER: Installing PYZ archive with Python modules. [1240] LOADER: PYZ archive: latte [1240] LOADER: Running pyiboot01_bootstrap.py [1240] LOADER: Running pyi_rth_mplconfig.py [1240] LOADER: Running pyi_rth_mpldata.py [1240] LOADER: Running pyi_rth_traitlets.py [1240] LOADER: Running pyi_rth_multiprocessing.py [1240] LOADER: Running pyi_rth_win32comgenpy.py [1240] LOADER: Running pyi_rth_pkgres.py [1240] LOADER: Running pyi_rth__tkinter.py [1240] LOADER: Running pyi_rth_qt4plugins.py [1240] LOADER: Running latteExec.py C:\\Users\\Digilog02\\Documents\\customer organization\\Latte\\projects\\ Regards Dave" + }, { + "contentId" : "3325002", + "userName" : "digilog", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 11:58 PM", + "userId" : "95145", + "content" : "Hi Alex, Are you able to help me out with this problem? If I can't get it to work I may have to try and find another technology for my project which would be a shame as I think this may fit well but I need to get the EVM going in order to evaluate the device for my application. I really don't have any other ideas to try to get this working. Regards DAve" + }, { + "contentId" : "3325041", + "userName" : "Alex Bhandari-Young", + "rankPoints" : "15670", + "rankName" : "Genius", + "date" : "Apr 23, 2020 12:58 AM", + "userId" : "4691324", + "content" : "Hi Dave, Sure thing. I understand you are under a time crunch so will try to get this resolved ASAP. Can you send hardware IDs for both com ports EVM shows up as? Can you also check control and data ports in command line of latte and send (see below) Can you also swap the USB cable and try with a fresh one to check that as well? Best, Alex" + }, { + "contentId" : "3325286", + "userName" : "digilog", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 6:21 AM", + "userId" : "95145", + "content" : "Hi Alex, Thanks for your reply. I have attached info as requested. I have also tried a new USB cable but this did not solve the problem. By the way how do you attach screen shots. When I try and paste a screen shot of my PC from Word it does not attach to the post. Regards Dave OPT3101 Control ID (COMM12) USB\\VID_2047&PID_0A3C&REV_0200&MI_00 USB\\VID_2047&PID_0A3C&MI_00 OPT3101 Data ID (COMM13) USB\\VID_2047&PID_0A3C&REV_0200&MI_02 USB\\VID_2047&PID_0A3C&MI_02 mEVMSelector.EVMSelector instance at 0x000000000EAACA08 #====== [u'COM12'] #====== [u'COM13'] #======" + }, { + "contentId" : "3326025", + "userName" : "Alex Bhandari-Young", + "rankPoints" : "15670", + "rankName" : "Genius", + "date" : "Apr 23, 2020 5:13 PM", + "userId" : "4691324", + "content" : "Thanks for this. I will review and get back. For pictures use the left button in the blue circle. To add files use the right in the circle. You'll have to save the pictures to a file and then upload. Unfortunately paste does not work :(" + }, { + "contentId" : "3327697", + "userName" : "digilog", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 25, 2020 12:33 AM", + "userId" : "95145", + "content" : "Hi Alex, A further update. I have just tried installing the EVM system onto a Windows 10 PC and unfortunately I am getting exactly the same result. It appears to me that unless the Latte program does not work at all there maybe a problem with the EVM hardware? What can I do to check this out? Thanks. Dave" + }, { + "contentId" : "3327720", + "userName" : "Alex Bhandari-Young", + "rankPoints" : "15670", + "rankName" : "Genius", + "date" : "Apr 25, 2020 1:39 AM", + "userId" : "4691324", + "content" : "Hi Dave, Can you send the full output in the log window where you saw the read from flash error? Can you also use the following in the command line and let me know the result? This will test the I2C - but this seems to be working okay dev._i2c_en.getValue() dev._num_avg_sub_frames.getValue() Can you also share a picture of the EVM or confirm it matches the one here /tool/OPT3101EVM To check what state the device is in you can look on the LED switching node with a scope probe to look for the 10MHz switching You can also probe the data_ready line that is brought out to one of the headers (see schematic in users guide). The MSP430 is looking for this pulse to send data to the PC. If we still can't get to the bottom of this I will look into how we can ship you another one. I agree this may be some hardware issue. Checking the I2C in the commands and probing the signals I mentioned above should help us see if that is the case. Best, Alex" + }, { + "contentId" : "3327781", + "userName" : "digilog", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 25, 2020 5:28 AM", + "userId" : "95145", + "content" : "Hi Alex, I have had a probe around with an oscilloscope and there isn't any data_ready signal (the line is low) and there is no signal on the LED (permanently high). There is also no slave I2C signals. I have done the measurement with and without running the Capture button in Latte and there is no difference. I have attached the log data file with the commands you requested and the flash error is on line 61 of the log file. I have also attached a photo of the EVM. Regards Dave" + }, { + "contentId" : "3327785", + "userName" : "digilog", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 25, 2020 5:33 AM", + "userId" : "95145", + "content" : "Hi Alex, I was unable to send the last reply with the log file so listed below is the file contents. The Flash error is highlighted in red. The last 4 lines in the log are the results of the following commands: dev._i2c_en.getValue() dev._num_avg_sub_frames.getValue() #====== #Executing .. OPT3101/OPT3101EVMrevE3_Demo/devInit.py #Start Time 2020-04-25 16:38:38.400000 Registers View - Reset property was not found #================ ERRORS:0, WARNINGS:1 ================# #================ ERRORS:0, WARNINGS:0 ================# DEVR; Sending reset pulse to device Internal electrical Crosstalk Correction REGWx80x004E1E; dev.tg_en=0 REGWx2Ax784920; dev.en_adaptive_hdr=0 REGWx14x000000; dev.en_sequencer=0 REGWx14x000000; dev.en_processor_values=0 REGWx80x004E1F; dev.tg_en=1 REGWx2Ex8001A0; dev.use_xtalk_reg_int=0 REGWx2Ex8001B0; dev.int_xtalk_calib=1 REGWx2Ex8001A0; dev.int_xtalk_calib=0 REGWx2Ex8001A0; dev.iq_read_data_sel=0 REGWx2Ex8001A0; dev.iq_read_data_sel=0 Internal Crosstalk, Amp:00000 codes ,Phase:0.0 degrees REGWx80x004E1E; dev.tg_en=0 REGWx2Ax784920; dev.en_adaptive_hdr=0 REGWx14x000000; dev.en_sequencer=0 REGWx14x000000; dev.en_processor_values=0 REGWx80x004E1F; dev.tg_en=1 Loading register map based on flash : Register Count 01 Reg Address: 0x0B Value:0x00110009 Loading register map based on flash : Register Count 02 Reg Address: 0x0C Value:0x00990000 Loading register map based on flash : Register Count 03 Reg Address: 0x29 Value:0x003F9C41 Loading register map based on flash : Register Count 04 Reg Address: 0x2B Value:0x00016978 Loading register map based on flash : Register Count 05 Reg Address: 0x2C Value:0x0000186A Loading register map based on flash : Register Count 06 Reg Address: 0x2D Value:0x00533586 Loading register map based on flash : Register Count 07 Reg Address: 0x2E Value:0x002207A0 Loading register map based on flash : Register Count 08 Reg Address: 0x2F Value:0x00490DBD Loading register map based on flash : Register Count 09 Reg Address: 0x30 Value:0x00800312 Loading register map based on flash : Register Count 10 Reg Address: 0x31 Value:0x000013A5 Loading register map based on flash : Register Count 11 Reg Address: 0x32 Value:0x0000005B Loading register map based on flash : Register Count 12 Reg Address: 0x33 Value:0x000026E6 Loading register map based on flash : Register Count 13 Reg Address: 0x34 Value:0x0000FCE7 Loading register map based on flash : Register Count 14 Reg Address: 0x35 Value:0x00005A19 Loading register map based on flash : Register Count 15 Reg Address: 0x36 Value:0x0000F857 Loading register map based on flash : Register Count 16 Reg Address: 0x38 Value:0x00000000 Loading register map based on flash : Register Count 17 Reg Address: 0x39 Value:0x00000000 Loading register map based on flash : Register Count 18 Reg Address: 0x3A Value:0x004F0000 Loading register map based on flash : Register Count 19 Reg Address: 0x41 Value:0x008F8010 Loading register map based on flash : Register Count 20 Reg Address: 0x42 Value:0x00004528 Loading register map based on flash : Register Count 21 Reg Address: 0x43 Value:0x009B0083 Loading register map based on flash : Register Count 22 Reg Address: 0x45 Value:0x00000570 Loading register map based on flash : Register Count 23 Reg Address: 0x47 Value:0x009B08F0 Loading register map based on flash : Register Count 24 Reg Address: 0x48 Value:0x009B08E8 Loading register map based on flash : Register Count 25 Reg Address: 0x49 Value:0x009B08F0 Loading register map based on flash : Register Count 26 Reg Address: 0x51 Value:0x00003D49 Loading register map based on flash : Register Count 27 Reg Address: 0x52 Value:0x0000339B Loading register map based on flash : Register Count 28 Reg Address: 0x53 Value:0x00002BCE Loading register map based on flash : Register Count 29 Reg Address: 0x5E Value:0x00000000 Loading register map based on flash : Register Count 30 Reg Address: 0x5F Value:0x00000039 Loading register map based on flash : Register Count 31 Reg Address: 0x60 Value:0x00130000 Loading register map based on flash : Register Count 32 Reg Address: 0x71 Value:0x00000000 Loading register map based on flash : Register Count 33 Reg Address: 0xB4 Value:0x00E1E1CE Loading register map based on flash : Register Count 34 Reg Address: 0xB5 Value:0x00000001 Loading register map based on flash : Register Count 35 Reg Address: 0xB8 Value:0x00018026 Loading register map based on flash : Register Count 36 Reg Address: 0xB9 Value:0x00000478 Operation Flash read Failed. #================ ERRORS:1, WARNINGS:1 ================# REGWx89x001B58; dev.tg_ovl_window_start=7000 REGWx6Ex0A1CE2; dev.en_temp_conv=1 REGWx07x800000; dev.config_tillum_msb=8 REGWx0Dx806000; dev.en_tillum_12b=1 REGWx02x92A448; dev.tsens_slave1=72 REGWx02xB2A448; dev.en_tillum_read=1 REGWx02x32A448; dev.temp_avg_illum=0 REGWx01x120140; dev.frame_vd_trig=1 REGWx01x1A0140; dev.i2c_en=1 REGWx01x1A0140; dev.i2c_rw=1 REGWx07x810000; dev.i2c_num_bytes_tran1=1 REGWx50x200101; dev.clip_mode_fc=1 REGWx2Ex2207A0; dev.iq_read_data_sel=3 REGWx78x001000; dev.gpio1_obuf_en=1 REGWx78x001080; dev.gpo1_mux_sel=2 REGWx0Bx110009; dev.dig_gpo_sel0=9 REGWx78x001080; dev.gpio2_obuf_en=0 REGWx78x011080; dev.gpio2_ibuf_en=1 REGWx9Fx000001; dev.num_sub_frames=1 REGWx9Fx001001; dev.num_avg_sub_frames=1 REGWx2Ex9207A0; dev.xtalk_filt_time_const=9 REGWx14x000000; dev.en_processor_values=0 REGWx2Bx016978; dev.hdr_thr_high=27000 REGWx2Cx001405; dev.hdr_thr_low=5125 REGWx2Ax78C920; dev.en_adaptive_hdr=1 REGWxB9x000478; dev.en_tx1_on_tx0=1 REGWxB9x000478; dev.en_tx2_on_tx0=0 REGWx85x00267A; dev.tg_seq_int_start=9850 REGWx86x002682; dev.tg_seq_int_end=9858 REGWx97x000001; dev.tg_seq_int_mask_start=1 REGWx97x001001; dev.tg_seq_int_mask_end=1 REGWx13x036B00; dev.compare_reg1=28000 REGWx14x00101D; dev.compare_reg2=4125 REGWx13x036B00; dev.mux_sel_compin=0 REGWx15x101108; dev.command0=264 REGWx15xB02108; dev.command1=2818 REGWx16x400100; dev.command2=256 REGWx16xC00100; dev.command3=3072 REGWx14x01101D; dev.en_sequencer=1 REGWx14x03101D; dev.en_processor_values=1 REGWx10x00C000; dev.en_cont_fcalib=1 REGWx0Fx154C4B; dev.start_freq_calib=1 REGWx0Fx954C4B; dev.en_freq_corr=1 REGWx0Fx914C4B; dev.sys_clk_divider=8 REGWx0Fx915000; dev.ref_count_limit=20480 REGWx0FxD15000; dev.en_floop=1 REGWx0FxF15000; dev.en_auto_freq_count=1 REGWx0FxF15000; dev.en_freq_corr=1 REGWx0FxF15000; dev.start_freq_calib=1 REGWx80x004E1F; dev.tg_en=1 #================ ERRORS:0, WARNINGS:0 ================# REGWx43x9B0083; dev.scale_phase_temp_coeff=2 REGWx45x000566; dev.temp_coeff_main_hdr0_tx0=1382 REGWx2Dx53357C; dev.temp_coeff_main_hdr1_tx0=1404 REGWx2Dx52957C; dev.temp_coeff_main_hdr0_tx1=1321 REGWx30x000312; dev.temp_coeff_main_hdr1_tx1=1168 REGWx2Fx490DBD; dev.temp_coeff_main_hdr1_tx1=73 REGWx46x000000; dev.temp_coeff_illum_hdr0_tx0=0 REGWx52x00339B; dev.temp_coeff_illum_hdr1_tx0=0 REGWx51x003D49; dev.temp_coeff_illum_hdr1_tx0=0 REGWx54x000000; dev.temp_coeff_illum_hdr0_tx1=0 REGWx53x002BCE; dev.temp_coeff_illum_hdr0_tx1=0 REGWx56x000000; dev.temp_coeff_illum_hdr1_tx1=0 REGWx55x000000; dev.temp_coeff_illum_hdr1_tx1=0 REGWxB5x000001; dev.scale_amb_phase_corr_coeff=1 REGWx0CxA00000; dev.amb_phase_corr_pwl_coeff0=160 REGWxB4xE1E1CE; dev.amb_phase_corr_pwl_coeff1=206 REGWxB4xE1E1CE; dev.amb_phase_corr_pwl_coeff2=225 REGWxB4xE1E1CE; dev.amb_phase_corr_pwl_coeff3=225 REGWxB8x01801B; dev.amb_phase_corr_pwl_x0=27 REGWxB8x01801B; dev.amb_phase_corr_pwl_x1=96 REGWxB9x000478; dev.amb_phase_corr_pwl_x2=120 #================ ERRORS:0, WARNINGS:0 ================# #================ ERRORS:0, WARNINGS:0 ================# #Done executing .. OPT3101/OPT3101EVMrevE3_Demo/devInit.py #End Time 2020-04-25 16:38:48.720000 #Execution Time = 10.3199999332 s #================ ERRORS:0, WARNINGS:0 ================# DEVB 1; Setting Device to 2 register mode REGWx80x004E1E; dev.tg_en=0 REGWx9Fx001001; dev.num_avg_sub_frames=1 REGWx80x004E1F; dev.tg_en=1 REGWx9Fx001001; dev.num_sub_frames=1 REGWx97x001001; dev.tg_seq_int_mask_start=1 REGWx97x001001; dev.tg_seq_int_mask_end=1 REGWx80x004E1E; dev.tg_en=0 REGWx14x02101D; dev.en_sequencer=0 REGWx14x00101D; dev.en_processor_values=0 REGWx2Ax784920; dev.en_adaptive_hdr=0 REGWx2Ax784922; dev.sel_tx_ch=1 REGWx2Ax794922; dev.sel_hdr_mode=1 REGWx80x004E1F; dev.tg_en=1 REGWx80x004E1E; dev.tg_en=0 REGWx9Fx000001; dev.num_avg_sub_frames=0 REGWx80x004E1F; dev.tg_en=1 REGWx80x004E1E; dev.tg_en=0 REGWx9Fx000000; dev.num_sub_frames=0 REGWx80x004E1F; dev.tg_en=1 REGWx9Fx000000; dev.num_sub_frames=0 REGWx97x001000; dev.tg_seq_int_mask_start=0 REGWx97x000000; dev.tg_seq_int_mask_end=0 CAPS; Sending command to start capture Capture data from EVM timed out -- no data received from EVM. Stopping capture. CAPE; Sending command to stop capture True #====== 0 #======" + } ], + "tags" : [ "/support/sensors/f/1023/tags/OPT3101EVM" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898104.json b/data/json/DLP/898104.json new file mode 100644 index 0000000000000000000000000000000000000000..dccbf6fbc9e0f69929a90d7c8d62837ab2fcf408 --- /dev/null +++ b/data/json/DLP/898104.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "898104", + "reporterName" : "Mathias Hansen", + "rankPoints" : "40", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS54308: Noise/ripple + DC level issues on VOUT with increasing VIN", + "rankName" : "Prodigy", + "replies" : " 5", + "views" : " 37", + "queryText" : "Part Number: TPS54308 Hi. I'm have some of the same issues as /support/power-management/f/196/t/858796, however I'm only doing a single supply. 4,5V-26,4V to 3,3V. I followed the WEBENCH design (and have the same design as the 3,3V design in the above link). I have not tried replacing with a TPS54302. Let my try to explain what I'm seeing. From VIN = 4,3V-8,5V everything seems good. VOUT and SW looks reasonable. VOUT = 3,26V and 100mV peak-peak ripple (could be better according to simulations). Image 1: VOUT @ VIN = 8,4V Image 2: SW @ VIN = 8,4V Raising VIN seems to increase ripple on VOUT and SW begins to look wrong. Image 3: VOUT @ VIN = 8,7V Image 4: SW @ VIN = 8,7V Image 5: VOUT @ VIN = 11,7V Image 6: SW @ VIN = 11,7V Image 7: VOUT @ VIN = 15,7V Image 8: SW @ VIN = 15,7V Image 9: VOUT @ VIN = 20,2V Image 10: SW @ VIN = 20,2V As you can see ripple increases significantly. This proceeds until VIN = 20,4V. Around 20,4V a very high audible noise occurs. Above this, the signals look nice again, and power consumption drops to ~50% just after the signals look nice again. Image 11: VOUT @ VIN = 20,5V Image 12: SW @ VIN = 20,5V Image 13: VOUT @ VIN = 23,6V Image 14: SW @ VIN = 23,6V Some observations: 1. VOUT drop when increasing VIN. VOUT = 3,24V @ VIN = 4,7V /\\ VOUT = 3,08V @ VIN = 23,6V 2. During the middle phase (8,6V - 20,4V) current consumption stays the same indicating poor performance from the regulator. In the outer phases were everything seems good we are pulling ~400mW. 4,7V VIN = 0,08mA 8,7V VIN = 0,06mA 11,7V VIN = 0,06mA 15,7V VIN = 0,06mA 18,7V VIN = 0,06mA 20,1V VIN = 0,06mA 20,7V VIN = 0,02mA This is mounted on a PCB from a PCB manufacturer. I have double checked all solderings and on a second board manually double soldered all solderings. This issue persists across 3 different prototypes. See below for schematic and PCB of circuit. Image 15: Schematic of circuit. Image 16: PCB layout of circuit. I'd appreciate some assistance ASAP as this product is pending my approval for he manufacturer to continue. Regards Mathias", + "partNumber" : " TPS54308", + "allResponseList" : [ { + "contentId" : "3320517", + "userName" : "Mathias Hansen", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 19, 2020 6:47 PM", + "userId" : "4830049", + "content" : "Hi again, Seemed that the issue was caused by unfiltered feedback. Placed a 100pF from VOUT to FEEDBACK (across R20 in above schematic) and everything seems to works as expected. Webench doesn't suggest this, and the TPS54308EVM-876 suggests not to place one either, however, not doing so resulted in the above scenario. TPS54302EVM-716 on the other hand suggests the filter capacitor. Regards Mathias" + }, { + "contentId" : "3321347", + "userName" : "Ryan Hu (BSR-MV)", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 20, 2020 2:30 PM", + "userId" : "4779079", + "content" : "Hi Mathias, The CFF cap is used to boost the phase at the crossing frequency. It's not a must but an option. The root cause to the issue might result from the board layout. Findings on the layout. 1. The FB trace is too close to the SW signal around the FB resistor of R20. 2. Inductor is too close to the IC. Leave some space margin would be better for the IC avoid noise from the inductor. 3. Suggest the trace on the D64 a little far away from the FB network resistors. 4. Suggest one 0.1uF cap at the input cap to filter high frequency noise." + }, { + "contentId" : "3323349", + "userName" : "Mathias Hansen", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 7:20 PM", + "userId" : "4830049", + "content" : "Hi Ryan, Thanks a lot for the reply. Makes sense and will be taken into consideration in future designs. Is there any formula or procedure to tuning the CFF cap size for optimum results? Regards Mathias" + }, { + "contentId" : "3325174", + "userName" : "Ryan Hu (BSR-MV)", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 3:16 AM", + "userId" : "4779079", + "content" : "Hi Mathias, The eq. 16 in the datasheet shows how to calculate the feed forward cap." + }, { + "contentId" : "3325600", + "userName" : "Mathias Hansen", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 12:50 PM", + "userId" : "4830049", + "content" : "Hi Ryan.. Thanks for stating the obvious. Must have overlooked that. Sorry for wasting your time. Regards Mathias" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS54308", "/support/power-management/f/196/tags/TPS54302" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898105.json b/data/json/DLP/898105.json new file mode 100644 index 0000000000000000000000000000000000000000..d565843c0e844b425214a72aaf53dd6e3d453be2 --- /dev/null +++ b/data/json/DLP/898105.json @@ -0,0 +1,71 @@ +{ + "ticketNumber" : "898105", + "reporterName" : "Tajpeer H", + "rankPoints" : "500", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "HDC2010: Getting wrong value of temperature for the first sample alone", + "rankName" : "Intellectual", + "replies" : " 7", + "views" : " 58", + "queryText" : "Part Number: HDC2010 Hello All, I am using MSP432P401R launchpad and using HDC2010 EVM kit to work on the sensor code. I have written a code which configures 1 sample per second and even with 5 samples per second. I am getting the data w.r.t the configurations. But the issue is with the first sample from the sensor which always gets wrong and that too for only temperature value. Humidity is getting correct. I am giving 1 sec delay before reading the data. Not sure what is happening with the first sample. I have iterated multiple times but same issue. Even the same issue when manually reading the data through I2C. Wondering why only Temperature data? PLease help. I2C Initialized! HDC2010: HDC2010_SoftwReset executed! HDC2010: Sample:0 HDC2010: hdc20100Temp = 32 hdc20100TempAsCelsius = -39.9194 HDC2010: hdc20100Hum = 30976 hdc20100HumAsRelative = 47.2656 HDC2010: Test case FAIL! HDC2010: Sample:1 HDC2010: hdc20100Temp = 28195 hdc20100TempAsCelsius = 30.9865 HDC2010: hdc20100Hum = 30995 hdc20100HumAsRelative = 47.2946 HDC2010: Test case PASS! HDC2010: Sample:2 HDC2010: hdc20100Temp = 28200 hdc20100TempAsCelsius = 30.9991 HDC2010: hdc20100Hum = 31008 hdc20100HumAsRelative = 47.3144 HDC2010: Test case PASS! HDC2010: Sample:3 HDC2010: hdc20100Temp = 28199 hdc20100TempAsCelsius = 30.9966 HDC2010: hdc20100Hum = 30979 hdc20100HumAsRelative = 47.2702 HDC2010: Test case PASS! HDC2010: Sample:4 HDC2010: hdc20100Temp = 28198 hdc20100TempAsCelsius = 30.9941 HDC2010: hdc20100Hum = 30990 hdc20100HumAsRelative = 47.2869 HDC2010: Test case PASS!", + "partNumber" : " HDC2010", + "allResponseList" : [ { + "contentId" : "3320304", + "userName" : "Josh Wyatt", + "rankPoints" : "61360", + "rankName" : "Guru", + "date" : "Apr 18, 2020 2:53 PM", + "userId" : "614", + "content" : "Dear Tajpeer - i think the only way this could happen is if, after the very first 'start conversion' command is sent, you are not waiting long enough to read out the temperature registers 0x00 and 0x01. Because you get the %RH value back correctly, this indicates you are reading the registers 0x02 and 0x03 back separately, and after the correct amount of time has elapsed. I would recommend here that you look at I2C lines, from power up, to see what the actual behavior is of your code. FAQ on this topic is here: /support/sensors/f/1023/t/878721?tisearch=e2e-sitesearch&keymatch=HDC2010 and FYI, this is slightly different, because the example reads out temp and humidity registers all together, but will show you what to look at. I would also recommend that you don't use the SW reset (wasted clock cycles) and also to read out the 0x04 register in your code for 0x80, (after sending the start conversion and waiting at least 1.3mSec, if using the default 14 bit resolution settings) then if that passes, to then read out the registers 0x00 through 0x03 all at once. This will guarantee you get good data, from the start, as it will force your code to wait long enough." + }, { + "contentId" : "3320307", + "userName" : "Tajpeer H", + "rankPoints" : "500", + "rankName" : "Intellectual", + "date" : "Apr 18, 2020 3:27 PM", + "userId" : "6095119", + "content" : "Hello Wyatt, Thanks for the reply. I have tried multiple iterations. and with each iteration, I had tried with different time delays like starting from 0.5 ms till 30 ms. But it fails to get the first sample. I even tried first getting the Humidity value ahead of Temperature value. And it fails to get correct values for both for first sample. As you suggested, I even tried with DataReady status with below code. i am reading the data only when this returns 1. This returns 1 but still got the wrong value. /* HDC2010 IsDataReady function to check DRDY_STATUS flag */ bool HDC2010_IsDataReady(void) { uint8_t txBuf[1]; uint8_t rxBuf[1]; uint8_t busId_1; /* I2C bus id */ uint8_t devAddr_1; /* Sensor address on the I2C bus */ bool isDataReady = 0; /* Default, data is not ready */ /* I2C bus ID */ busId_1 = 0; /* Sensor address on the I2C bus - ADR grounded*/ devAddr_1 = HDC2010_SLAVE_ADDRESS; /* Write Configuration Register */ txBuf[0] = HDC2010_INT_DRDY; mcu_i2cTransfer(busId_1, devAddr_1, txBuf, 1, rxBuf, 1); if(rxBuf[0] & 0x80) isDataReady = 1; Display_printf(display, 0, 0, \"HDC2010: HDC2010_IsDataReady executed!\"); return isDataReady; }" + }, { + "contentId" : "3320308", + "userName" : "Josh Wyatt", + "rankPoints" : "61360", + "rankName" : "Guru", + "date" : "Apr 18, 2020 3:33 PM", + "userId" : "614", + "content" : "Dear Tajpeer - Please put o'scope or logic analyzer on your hardware and capture, from power up - this will show us exactly what is happening." + }, { + "contentId" : "3320310", + "userName" : "Tajpeer H", + "rankPoints" : "500", + "rankName" : "Intellectual", + "date" : "Apr 18, 2020 3:36 PM", + "userId" : "6095119", + "content" : "Hello Wyatt, I don't have oscilloscope with me now to capture the signals, due to covid-19. Let me trigger this thread once I get the proper signals to show and discuss." + }, { + "contentId" : "3320321", + "userName" : "Josh Wyatt", + "rankPoints" : "61360", + "rankName" : "Guru", + "date" : "Apr 18, 2020 4:12 PM", + "userId" : "614", + "content" : "OK - will wait on you then - in the meantime, would recommend you check out examples we have on sysconfig or resource explorer, as they might also help you out, in finding your timing issue, in the absence of you having the equipment to troubleshoot with. I would also recommend getting a logic analyzer (which you might be able to order and receive via mail during these time) - these are infinitely helpful - i personally recommend the Saleae devices, in all my years of dealing with various protocols, this is the best one i have ever used, and I did order and receive one about a week ago, as i wanted to upgrade from their previous model, to include analog sampling ability." + }, { + "contentId" : "3326640", + "userName" : "Tajpeer H", + "rankPoints" : "500", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 5:28 AM", + "userId" : "6095119", + "content" : "Till we get actual signals from logiz analyzer, I just want to show my code how I tried with different delays for getting the first sample from HCD2010 strating from 100Microseconds to 10ms. But with all the timing delays, we got the same results. Please suggest if you are getting anythign from the code below, =============================================================== void mcu_msWait(unsigned long msWait) { static delay = 1; /* * Add MCU specific wait loop for msWait. The unit is in milli-seconds */ // Delay(); usleep(delay*100); // In microseconds //usleep(msWait*1000); // ~2 ms delay++; Display_printf(display, 0, 0, \"HDC2010: mcu_msWait: %d Microseconds\", (delay*100)); } =============================================================== uint32_t HDC2010_tempread(HDC2010_Handle sensor) { uint8_t txBuf[2]; uint8_t rxBuf[1]; uint8_t tHigh; uint8_t tLow; uint32_t tmp; /* If AMM is disabled trigger conversion */ if (!(sensor->config & HDC2010_CONFIG_AMM_MASK)) { /* Reset AMM to start measurement */ txBuf[0] = HDC2010_MEAS_CONFIG; txBuf[1] = sensor->measConfig | HDC2010_MEAS_CONFIG_MEAS_TRIG_START; mcu_i2cTransfer(sensor->busId, sensor->devAddr, txBuf, 2, rxBuf, 0); /* Wait for conversion to complete */ mcu_msWait(sensor->convWaitTemp); } /* Read temperature register high byte */ txBuf[0] = HDC2010_TEMP_HIGH; mcu_i2cTransfer(sensor->busId, sensor->devAddr, txBuf, 1, rxBuf, 1); tHigh = rxBuf[0]; /* Read temperature register low byte */ txBuf[0] = HDC2010_TEMP_LOW; mcu_i2cTransfer(sensor->busId, sensor->devAddr, txBuf, 1, rxBuf, 1);= rxBuf[0]; /* Sign extend and combine */ tmp = ((uint32_t)tHigh << 8) | tLow; return (tmp); }" + }, { + "contentId" : "3327007", + "userName" : "Josh Wyatt", + "rankPoints" : "61360", + "rankName" : "Guru", + "date" : "Apr 24, 2020 12:53 PM", + "userId" : "614", + "content" : "Dear Tajpeer - the wait time you need to adjust is between you writing register 0x0F with 0x01 and reading back the results. In this case, I would recommend you do one or more of these suggestions. 1. Implement one shot mode to reveal to yourself how the delay needs to occur between the start of conversion and reading back the registers - if in default mode, you need at least 1300mSec between issuance of 0x01 to 0x0F register and expecting new values Here is a flow chart for you to follow: /cfs-file/__key/communityserver-discussions-components-files/1023/ONE_5F00_SHOT_5F00_HDC20x0_5F00_FIRMWARE_5F00_FLOW.pdf 2. Make a flow chart of your own code (since you are wanting to do automatic mode) and compare to these (this is with using DRDY/INT line and also without - two pages, two separate flow charts) /cfs-file/__key/communityserver-discussions-components-files/1023/AUTO_5F00_HDC20x0_5F00_FIRMWARE_5F00_FLOW.pdf you can also review this document, too ==> /lit/an/snaa312/snaa312.pdf" + } ], + "tags" : [ "/support/sensors/f/1023/tags/HDC2010", "/support/sensors/f/1023/tags/MSP432P401R" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898115.json b/data/json/DLP/898115.json new file mode 100644 index 0000000000000000000000000000000000000000..ad79a42001cdb3284076697ee06a32a0a20488a8 --- /dev/null +++ b/data/json/DLP/898115.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "898115", + "reporterName" : "zoujiangyilang", + "rankPoints" : "4045", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "1kw half brick DC / DC analog power supply scheme selection", + "rankName" : "Genius", + "replies" : " 2", + "views" : " 23", + "queryText" : "Seniors: Hello, Recently, I received a case of input voltage 100V, output power 1000W (24V / 42A), efficiency not less than 95%, half brick size (61 * 57.9 * 12.7mm). Is there any suitable circuit scheme recommended? I hope the circuit is simple, and analog control power is appropriate. Thank you.", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3321060", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 11:15 AM", + "userId" : "1139254", + "content" : "Hi zoujiangyilangcompany has two full bridge controllers which maybe of interest. LM5045 which is designed for telecoms input voltage range but can work up to 100V and I have see it designed into 800W and 1.4Kw designs. The other part is the UCC28951 which is a phase shifted full bridge controller, I have attached a schematic for a design example for UCC28950 which is a pin to pin compatible predecessor of the UCC28951.PMP4584_Rev_A_SCH.pdf Regards Peter" + }, { + "contentId" : "3323857", + "userName" : "zoujiangyilang", + "rankPoints" : "4045", + "rankName" : "Genius", + "date" : "Apr 22, 2020 6:28 AM", + "userId" : "4431587", + "content" : "Thank you very much." + } ], + "tags" : [ "/support/power-management/f/196/tags/1kw%2bhalf%2bbrick%2bDC%2b_2F00_%2bDC%2banalog%2bpower%2bsupply%2bscheme%2bselection" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898121.json b/data/json/DLP/898121.json new file mode 100644 index 0000000000000000000000000000000000000000..32dc96976e569ae7d3c6282263932ce366b772c2 --- /dev/null +++ b/data/json/DLP/898121.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898121", + "reporterName" : "Ponsonby Rivers", + "rankPoints" : "460", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM5170-Q1: Gain and phase graph calculations", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 23", + "queryText" : "Part Number: LM5170-Q1 After entering the appropriate data in the LM5170DESIGN-CALC spreadsheet found in snvc205, I have determined the Buck and Boost mode voltage loop compensation parameters as given in Section 11 and Section 12 of the spreadsheet respectively. This has allowed me to find the digital coefficients by using the Bilinear transformation which is required since we're using a microcontroller to perform the duties of the analog compensator. (1) Is this the recommended/correct approach? (2) The Buck and Boost mode voltage loop graphs shown in the LM5170DESIGN-CALC spreadsheet show the gain and phase margins. Can you share how this was determined as I'd like to understand the correlation between the information entered into the spreadsheet and the graphs. Where can I find the calculations which produces these graphs? (3) The loads of our system will naturally vary. Would it be suggested to have coefficients at one particular condition or to have multiple coefficients for different conditions and select the most appropriate?", + "partNumber" : " LM5170-Q1", + "allResponseList" : [ { + "contentId" : "3322074", + "userName" : "Youhao Xi", + "rankPoints" : "39085", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 11:24 PM", + "userId" : "1880260", + "content" : "Hi Ponsonby, Thank you for your interests in the LM5170. (1) You approach sound right. (2) There are two loops: the inner current loop and the output voltage loop. The inner voltage loop calculation is described in the datasheet section 9.12. The voltage loop is also a simple 1st order system if you put the loop crossover frequency at 1/10 or lower of the inner current loop crossover frequency. The transfer function can be obtained from Figure 53: when closing the voltage loop, the inner current loop is closed and the LM5170 is basically a current source. Not that the boost loop may have the right half-plan zero, as predicted in conventional boost circuit. (3) the circuit can be made stable over the entire load range with one compensation. However, this circuit has a diode emulation mode and in DCM (light load) the gain does drop and you may change the compensation in your digital algorithm to better improve the loop response. You may have two to three additional coefficients to cover shallow and deep DCM conditions. Thanks, Youhao Xi, Applications Engineering" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM5170_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898126.json b/data/json/DLP/898126.json new file mode 100644 index 0000000000000000000000000000000000000000..c4a4c4169943581e555a423237c5db491f7e8998 --- /dev/null +++ b/data/json/DLP/898126.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "898126", + "reporterName" : "zoujiangyilang", + "rankPoints" : "4045", + "resolutionStatus" : "Resolved", + "ticketName" : "LM5035: LM5035 is used for 100V Vin power supply，Will the HO port be damaged？", + "rankName" : "Genius", + "replies" : " 2", + "views" : " 18", + "queryText" : "Part Number: LM5035 Hello there I see that the withstand voltage of the HO port of the LM5035 is 105V. If the power supply Vin is 100V and the PWM drive voltage is 10V, then the maximum voltage of the HO port will reach 110V, will it damage the HO port？ So how can the LM5035 be used to ensure that the PWM drive voltage reaches 10V when Vin is 100V?", + "partNumber" : " LM5035", + "allResponseList" : [ { + "contentId" : "3321095", + "userName" : "John Griffin1", + "rankPoints" : "32175", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 11:46 AM", + "userId" : "1693693", + "content" : "Hello zoujiangyilang, Yes you are correct. The maximum ratings for high side gate driver output are listed in the Absolute Maximum Ratings table in the data sheet The HB pin is rated at 118V HS is rated at 105V Regards John" + }, { + "contentId" : "3323853", + "userName" : "zoujiangyilang", + "rankPoints" : "4045", + "rankName" : "Genius", + "date" : "Apr 22, 2020 6:25 AM", + "userId" : "4431587", + "content" : "Thank you" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM5035%2bis%2bused%2bfor%2b100V%2bVin%2bpower%2bsupply_0CFF_Will%2bthe%2bHO%2bport%2bbe%2bdamaged", "/support/power-management/f/196/tags/lm5035" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898130.json b/data/json/DLP/898130.json new file mode 100644 index 0000000000000000000000000000000000000000..11c97bd8d929acda0d976fe49adb47cd25f6db1d --- /dev/null +++ b/data/json/DLP/898130.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898130", + "reporterName" : "Nikos Antoniou", + "rankPoints" : "310", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ27421-G1: Fuel Gauge Reading/Writting", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 28", + "queryText" : "Part Number: BQ27421-G1 Hi everyone, I've included the bq27421-G1 into my prototype design and I want to read and write on the chip. Do you have any driver or any c code for this chip? Thanks in advance Nick", + "partNumber" : " BQ27421-G1", + "allResponseList" : [ { + "contentId" : "3321528", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 3:50 PM", + "userId" : "1864278", + "content" : "See the cod below. Andy" + }, { + "contentId" : "3322320", + "userName" : "Nikos Antoniou", + "rankPoints" : "310", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 5:35 AM", + "userId" : "6003360", + "content" : "Thank you Andy, Are there any drivers for windows machines? Nick" + }, { + "contentId" : "3323440", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 8:43 PM", + "userId" : "1864278", + "content" : "As far as I know, no. Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/bq27421_2D00_G1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898138.json b/data/json/DLP/898138.json new file mode 100644 index 0000000000000000000000000000000000000000..50475e280f3f8468f237294e6333abc5f50b644a --- /dev/null +++ b/data/json/DLP/898138.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "898138", + "reporterName" : "Lauri Viitas", + "rankPoints" : "110", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "AWR2243: Which power rails and signals reference Analog ground (VSSA)?", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 38", + "queryText" : "Part Number: AWR2243 I am trying to clarify, which power rails and signals reference Analog ground (VSSA) for layout and decoupling purposes? Thanks, Lauri", + "partNumber" : " AWR2243", + "allResponseList" : [ { + "contentId" : "3320824", + "userName" : "Vivek Dham", + "rankPoints" : "30420", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 6:46 AM", + "userId" : "333578", + "content" : "Hello Lauri, all the 1.8V supplies and 1V supplies are referenced to VSSA. But we recommend using a single solid ground on the board, ie shorting VSS and VSSA to solid gnd plans on the PCB. Regards, Vivek" + }, { + "contentId" : "3327871", + "userName" : "Lauri Viitas", + "rankPoints" : "110", + "rankName" : "Prodigy", + "date" : "Apr 25, 2020 3:59 PM", + "userId" : "6314030", + "content" : "Dear Vivek, Here's a list of \"Analog\" rails and signals, I have compiled based on your comment and datasheet. Please correct, if I missed any below referencing VSSA: VIN_18BB, VIN_18VCO, VOUT_14APLL, VOUT_14SYNTH, VOUT_PA, VIN_13RF1, VIN_13RF2 RX1-4, TX1-4, FM_CW_CLKOUT, FM_CW_SYNCOUT, FM_CW_SYNCIN1, FM_CW_SYNCIN2, CLKP, CLKM, OSC_CLKOUT. Thanks, Lauri" + }, { + "contentId" : "3328413", + "userName" : "Vivek Dham", + "rankPoints" : "30420", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 7:19 AM", + "userId" : "333578", + "content" : "Hello Lauri, Also the XTAL pins are referenced to VSSA. But could you clarify your intent here? Are you planning to separate the VSS and VSSA on the board? Regards, Vivek" + }, { + "contentId" : "3329126", + "userName" : "Lauri Viitas", + "rankPoints" : "110", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 4:21 PM", + "userId" : "6314030", + "content" : "Dear Vivek, I had the XTAL pins already listed. I'd need the list of rails and signals to be accurate as yes, I am planning to separate the references on the board. The VSS and VSSA will have the same DC potential. Thanks, Lauri" + } ], + "tags" : [ "/support/sensors/f/1023/tags/AWR2243", "/support/sensors/f/1023/tags/awr20_5F00_p2_5F00_hwa20_5F00_power" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898142.json b/data/json/DLP/898142.json new file mode 100644 index 0000000000000000000000000000000000000000..ade93634455590ac8924fdb18503681198cee66c --- /dev/null +++ b/data/json/DLP/898142.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "898142", + "reporterName" : "Aneesh TS", + "rankPoints" : "1500", + "resolutionStatus" : "Resolved", + "ticketName" : "UCC28950: Clarification required for Coss_QA_AVG value of spp20n60cfd Mosfet in SLUA560B document", + "rankName" : "Expert", + "replies" : " 4", + "views" : " 20", + "queryText" : "Part Number: UCC28950 Dearcompany Experts, In SLUA560B document Coss_QA_SPEC of spp20n60cfd is given as 780pF at 25V. And Coss_QA_AVG value calculated as 193pF.But in the datasheet of spp20n60cfd in Page number 8, there is a Coss Vs Voltage curve, if you read Coss at 400V which gives around 70pF which is too far than 190pF calculated.So what is the right value of Coss needs to consider in our design? Regards Aneesh", + "partNumber" : " UCC28950", + "allResponseList" : [ { + "contentId" : "3321015", + "userName" : "Colin Gillmor", + "rankPoints" : "22565", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 10:19 AM", + "userId" : "1139376", + "content" : "HI Aneesh The problem is that it is very difficult to predict the effective stray capacitance at the switched node. First of course is the Coss of the MOSFET. The infineon data sheet gives a figure of 780pF at Vds of 25V but you can of course see that this capacitance is very non-linear as the drain / source voltage changes. The data sheet calculation tries to compensate for this by assuming that the capacitance vs voltage curve follows a square law (hence the square root in eq. 56 in the data sheet), but the result is of course an estimate. Possibly a better estimate would be to use the Co(er) specification in the MOSFET DS (83pF) to calculate the energy needed to achieve ZVS and to use the Co(tr) (160pF) value when calculating the delay times. Please remember that there will be additional stray capacitances at the switched node due to PCB tracks, MOSFET Tab to heatsink and especially transformer self capacitances. This is the main reason why it is difficult to know in advance what the capacitances will be - and why it is only when you have hardware available that you can fine tune the shim inductor and delay times. Regards Colin" + }, { + "contentId" : "3321016", + "userName" : "Colin Gillmor", + "rankPoints" : "22565", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 10:19 AM", + "userId" : "1139376", + "content" : "HI Aneesh The problem is that it is very difficult to predict the effective stray capacitance at the switched node. First of course is the Coss of the MOSFET. The infineon data sheet gives a figure of 780pF at Vds of 25V but you can of course see that this capacitance is very non-linear as the drain / source voltage changes. The data sheet calculation tries to compensate for this by assuming that the capacitance vs voltage curve follows a square law (hence the square root in eq. 56 in the data sheet), but the result is of course an estimate. Possibly a better estimate would be to use the Co(er) specification in the MOSFET DS (83pF) to calculate the energy needed to achieve ZVS and to use the Co(tr) (160pF) value when calculating the delay times. Please remember that there will be additional stray capacitances at the switched node due to PCB tracks, MOSFET Tab to heatsink and especially transformer self capacitances. This is the main reason why it is difficult to know in advance what the capacitances will be - and why it is only when you have hardware available that you can fine tune the shim inductor and delay times. Regards Colin" + }, { + "contentId" : "3322300", + "userName" : "Aneesh TS", + "rankPoints" : "1500", + "rankName" : "Expert", + "date" : "Apr 21, 2020 5:04 AM", + "userId" : "3729355", + "content" : "Dear Colin, Thanks for clarifying my doubt. Regards Aneesh" + }, { + "contentId" : "3322569", + "userName" : "Colin Gillmor", + "rankPoints" : "22565", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 9:27 AM", + "userId" : "1139376", + "content" : "Hi Aneesh That's excellent - I'm going to close this thread. Regards Colin" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC28950" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898159.json b/data/json/DLP/898159.json new file mode 100644 index 0000000000000000000000000000000000000000..124a854a33f222f66e1b113e9732380f27306997 --- /dev/null +++ b/data/json/DLP/898159.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "898159", + "reporterName" : "Michael Black2", + "rankPoints" : "80", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC28600: Reference Schematic Question", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 33", + "queryText" : "Part Number: UCC28600 Hello, I am using the UCC28600 to design a power supply with a 19V, 5A output. I came across the PMP5029 reference design which features a 19V, 2.2A output. First Question: Is the PMP5029 capable of outputting 5A? Second Question: What controls the output current capabilities of a flyback converter? is it just based on the input voltage and the switching frequency of the flyback controller? Attached is the PMP5029 schematic for reference/ slur385.pdf", + "partNumber" : " UCC28600", + "allResponseList" : [ { + "contentId" : "3321299", + "userName" : "Mike O'", + "rankPoints" : "27215", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 2:08 PM", + "userId" : "10947", + "content" : "Hello, I don't believe the UCC28600 is capable of handling 5A. However, to get more power out of it you would have to redesign the transformer for more storage energy by increasing the primary magnetizing inductance. You can either use the excel design tool or webench to calculate the primary magnetizing inductance. You would have to increase your input and output capacitor bank by a factor of 5/2 and adjust the current sense resistor. This can be also verified and calculated with the webench tool or excel design tool. Regards," + }, { + "contentId" : "3321958", + "userName" : "Michael Black2", + "rankPoints" : "80", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 8:55 PM", + "userId" : "6240994", + "content" : "Ok, thank you. That is the conclusion I came to as well. I am a little confused when you say \"I don't believe the UCC28600 is capable of handling 5A\". I thought all that mattered was the amount of energy stored in the core? Doesn't the UCC28600 just try to maintain a certain voltage drop across the load? Edit: What section of the datasheet has the maximum Current, Voltage, Power ratings of a particular controller? Edit 2: There are some graphs on the UCC28600 that have data at > 5A such as efficiency vs output load, voltage vs current." + } ], + "tags" : [ "/support/power-management/f/196/tags/PMP5029", "/support/power-management/f/196/tags/UCC28600" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898174.json b/data/json/DLP/898174.json new file mode 100644 index 0000000000000000000000000000000000000000..045b13061ef1697ff9ce9844635abb78b0a1d2ed --- /dev/null +++ b/data/json/DLP/898174.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898174", + "reporterName" : "sneha gourishetty", + "rankPoints" : "40", + "resolutionStatus" : "Resolved", + "ticketName" : "TL431: Negative reference voltage generation using tl431", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 26", + "queryText" : "Part Number: TL431 Hii Recently i went through a circuit using tl431. I have -5V input need to generate -3V constant reference voltage. Can i use tl431 to generate -3V constant. Trying to simulate the circuit but not working. How to calculate the resistor values Regards", + "partNumber" : " TL431", + "allResponseList" : [ { + "contentId" : "3320718", + "userName" : "Trailokya Rai", + "rankPoints" : "1365", + "rankName" : "Intellectual", + "date" : "Apr 20, 2020 4:42 AM", + "userId" : "4730524", + "content" : "Hi Sneha I simulated your circuit incompany TINA tool as follow - Resistor calculation equation will be same as specified in figure 21 in the data sheet. Vout = VKA (1 + R1 / R2) Vout = 3V and VKA ≈ 2.5 . You can put the values in the equation and find out the ration of R1 and R2. Please keep R2 min = 10k and make sure TL431 is getting Imin current as specified in the data sheet. Regards Trailokya" + }, { + "contentId" : "3328023", + "userName" : "sneha gourishetty", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 26, 2020 8:15 AM", + "userId" : "6327434", + "content" : "Hii Thanks for the reply. I would like to know what is the max value of c1 can be kept. Also if I want to draw an output current of 100mA. Will this support by changing the r3 value." + }, { + "contentId" : "3328313", + "userName" : "Trailokya Rai", + "rankPoints" : "1365", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 5:45 AM", + "userId" : "4730524", + "content" : "Sneha You can refer figure 16 in the data sheet for cap selection. VKA = 3 V will be equivalent to curve A . For 100mA current, cap range (1nF , 10nF ) and (2uF , 10uF ) are stable. Cap range (20nF , 1uF) is unstable. Value of R3 will be 20 ohms for 100mA current. It should work fine. The data sheet plot for stability is given with R3 = 150 ohms. My recommendation is to put CL either near to 1nF or near to 10uF to make sure the circuit is always stable. Regards Trailokya" + } ], + "tags" : [ "/support/power-management/f/196/tags/TL431" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898178.json b/data/json/DLP/898178.json new file mode 100644 index 0000000000000000000000000000000000000000..ec558af826b68060521c494489d7a7fe94021d63 --- /dev/null +++ b/data/json/DLP/898178.json @@ -0,0 +1,79 @@ +{ + "ticketNumber" : "898178", + "reporterName" : "Vern", + "rankPoints" : "50", + "resolutionStatus" : "", + "ticketName" : "TPS6594-Q1: PMIC-WDG", + "rankName" : "Prodigy", + "replies" : " 8", + "views" : " 64", + "queryText" : "Part Number: TPS6594-Q1 Hi TI， My board has been restarting all the time. I have not used GPIO8 on the hardware. I disabled both WD_EN and WD_RST_EN in the software, but WDG is still not disabled. What is the way to disable WDG in the software? In addition, I still need to use the WDG function in the later period. The WDG I used to feed the dog through a timer, but this WDG seems to be a little different. I want to know what the dog feeding is in Trigger Mode and Q & A Mode. It is best to have demo code for reference. Rgds， Vern", + "partNumber" : " TPS6594-Q1", + "allResponseList" : [ { + "contentId" : "3320661", + "userName" : "Phil Yi40", + "rankPoints" : "5835", + "rankName" : "Expert", + "date" : "Apr 20, 2020 3:16 AM", + "userId" : "8412", + "content" : "Hi, Vern, When the device releases the nRSTOUT pin, the watchdog starts with the Long Window. This Long Window has a time interval (tLONG_WINDOW) which is has a default value of 12 minutes set in bits WD_LONGWIN[7:0] (default value 0xFF). As long as the watchdog is in the Long Window, the MCU can either clear bit WD_EN to disable the watchdog, or configure the watchdog through the following register bits: • WD_LONGWIN[7:0] to configure the duration of the Long-Window time-interval • WD_MODE_SELECT to select the Watchdog mode (Trigger mode or Q&A Mode) • WD_PWRHOLD to activate the Watchdog Disable function (more detail in Section 5.3.10.4) • WD_RETURN_LONGWIN to return to Long-Window after completion of the current watchdog sequence (more detail in Section 5.3.10.4) • WD_WIN1[6:0] to configure the duration of the Window-1 time-interval • WD_WIN2[6:0] to configure the duration of the Window-2 time-interval • WD_RST_EN to enable/disable the watchdog-reset function • WD_EN to enable/disable the watchdog • WD_FAIL_TH[2:0] to configure the Watchdog-Fail threshold • WD_RST_TH[2:0] to configure the Watchdog-Reset threshold • WD_QA_FDBK[1:0] to configure the settings for the reference answer-generation • WD_QA_LFSR[1:0] to configure the settings for the question-generation • WD_QUESTION_SEED[3:0] to configure the starting-point for the 1st question-generation • WD_QA_CFG for watchdog in Q&A Mode" + }, { + "contentId" : "3322141", + "userName" : "Vern", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 1:19 AM", + "userId" : "6304346", + "content" : "Hi Phil, My hardware is not using GPIO8, GPIO8 is in float state, so how can I disable the reset function of WDG, I tried to disable WD_EN or WD_RST_EN, but it has no effect, what should I do to disable WDG? Do you have any WDG related demo code to share with me? Rgds， Vern" + }, { + "contentId" : "3322230", + "userName" : "Phil Yi40", + "rankPoints" : "5835", + "rankName" : "Expert", + "date" : "Apr 21, 2020 2:57 AM", + "userId" : "8412", + "content" : "Hi, Vern, You need to disable watchdog in the Long Window (default value is 12 minutes?) by setting WD_EN=0b , or other ways in the Long Window. I don't have WDG related demo code so far." + }, { + "contentId" : "3322324", + "userName" : "Vern", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 5:40 AM", + "userId" : "6304346", + "content" : "Hi Phil， Can I understand this way? If I set the WD_PWRHOLD bit to 1, and then clear WD_EN to 0, then the WDG function can be disabled.If yes, I proceeded as above, and WDG still did not ban it. Is this what is the reason? There is still a question, how to confirm whether it is in a long window, or how to enter a long window? Rgds， Vern" + }, { + "contentId" : "3324623", + "userName" : "Phil Yi40", + "rankPoints" : "5835", + "rankName" : "Expert", + "date" : "Apr 22, 2020 4:26 PM", + "userId" : "8412", + "content" : "Hi, Vern, The Long Window starts from device releases the nRSTOUT pin. It's maybe helpful to check if anything else is resetting the device; since the device keeps resetting and you think disabling the watchdog should fix this. But there could also be another issue that is resetting the device. Also, how fast does the board reset? If it is shorter than 12 minutes, then it is probably not from watchdog." + }, { + "contentId" : "3325040", + "userName" : "Vern", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 12:51 AM", + "userId" : "6304346", + "content" : "Hi Phil， When the GPIO8 pin of PMIC is pulled up, there will be no restart, but this is how the hardware disables WDG. The restart time of my machine is not a fixed time, but it is less than 12 minutes, what other circumstances will this PMIC cause restart? Rgds， Vern" + }, { + "contentId" : "3327807", + "userName" : "Vern", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 25, 2020 8:14 AM", + "userId" : "6304346", + "content" : "Hi Phil， If tps659411 and tps659413 are used together, is it necessary to disable both WDG when disabling WDG? If I only use I2C_1, how do I select the register on page 4? As described in the following manual, the two least significant bits change the page selection, so you can only select up to page 3, how do I select page 4 to operate the WDG register? 5.5.2 I2C-Compatible Interface The default I2C1 7-bit slave device address of the TPS6594-Q1 device is set to 0x48 (0b1001000 in binary), while the two least-significant bits can be changed for alternative page selection listed under Section 5.6.1. The default 7-bit slave device address for the Q&A WatchDog I2C2 interface is set to 0x12. The I2C1_ID and I2C2_ID register bits can be used to reconfigure the 7-bit default slave address for the corresponding I2C interface. Rgds， Vern" + }, { + "contentId" : "3329791", + "userName" : "Phil Yi40", + "rankPoints" : "5835", + "rankName" : "Expert", + "date" : "Apr 28, 2020 2:42 AM", + "userId" : "8412", + "content" : "Hi, Vern, Please read through the user guide in the link below; you should find the answers to your questions: /lit/ug/slvubr0/slvubr0.pdf?ts=1588041622135" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS6594_2D00_Q1", "/support/power-management/f/196/tags/PMIC_2D00_WDG" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898197.json b/data/json/DLP/898197.json new file mode 100644 index 0000000000000000000000000000000000000000..b22cdab730ae959f7c31ed768a488c6e42e09c28 --- /dev/null +++ b/data/json/DLP/898197.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "898197", + "reporterName" : "Henk Rode", + "rankPoints" : "155", + "resolutionStatus" : "Resolved", + "ticketName" : "UCC28950: Powering and Grounding Issue", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 39", + "queryText" : "Part Number: UCC28950 Hello , I'm designing a system wich has a 40V output voltage , but I could not understand where to connect the GND of the IC GND is connected to the output voltage in the reference design like in the picture below. So this is the reason that I'm confused. Normally I wanted to feed the controller's VDD and GND with a flyback converter wich has 12V output. But now also do I have to connect the GND of the Flyback converter to the power stage wich has 40V output? I will be happy if you help me. Thanks Henk", + "partNumber" : " UCC28950", + "allResponseList" : [ { + "contentId" : "3320990", + "userName" : "Colin Gillmor", + "rankPoints" : "22565", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 9:46 AM", + "userId" : "1139376", + "content" : "Hi Henk The short answer to your question is - YES - here's a markup of the schematic showing where the output of the Flyback goes. BTW - I'd suggest you use the UCC28951 instead of the UCC28950 The UCC28951 device is an enhanced version of the UCC28950. It is a fully compatible drop-in replacement for the UCC28950. Refer to application note SLUA853 at /lit/an/slua853/slua853.pdf for more details. The UCC28951 is typically the better choice, especially for applications where the system may have to operate simultaneously at a duty cycle> 90% and current limit. I don't know if you already have a Flyback design in mind but the PMP8787 reference design might be of interest - /tool/PMP8787 Regards Colin" + }, { + "contentId" : "3324026", + "userName" : "Henk Rode", + "rankPoints" : "155", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 9:28 AM", + "userId" : "6283260", + "content" : "Thank you for the quick response. No , I dont have a flyback design now. Can I use this flyback controller for more outputs? like to supply to re-inforced igbt/mosfet drivers and the ucc28950 controller." + }, { + "contentId" : "3324049", + "userName" : "Colin Gillmor", + "rankPoints" : "22565", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 9:49 AM", + "userId" : "1139376", + "content" : "Hi Henk The reference design is a single output 12V at 500mA - that should be enough to supply the controller and driver current. If you need multiple, isolated outputs then you would need to redesign the transformer, adding a winding, a diode and output cap for the second output. You could use Webench to increase the power output if 500mA were not enough - /design-resources/design-tools-simulation/webench-power-designer.html?utm_source=google&utm_medium=cpc&utm_campaign=app-null-null-WEBENCH_Ad-cpc-lp-google-wwe&utm_content=WEBENCH_Ad&ds_k=power+supply+design+tool&DCM=yes&gclid=EAIaIQobChMIn5XXzOD76AIVUKWaCh3K-wcuEAAYASAAEgJ_4PD_BwE&gclsrc=aw.ds Let us know if you have any other questions. Regards Colin" + }, { + "contentId" : "3327573", + "userName" : "Henk Rode", + "rankPoints" : "155", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 9:32 PM", + "userId" : "6283260", + "content" : "Thank you for the suggestions and fast response, Have a good day." + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC28950" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898205.json b/data/json/DLP/898205.json new file mode 100644 index 0000000000000000000000000000000000000000..c679275fedd802def8eafc8ae8b5b6efeb4a3682 --- /dev/null +++ b/data/json/DLP/898205.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "898205", + "reporterName" : "Onur Guzeldemirci", + "rankPoints" : "90", + "resolutionStatus" : "Resolved", + "ticketName" : "Compiler/DLP-ALC-LIGHTCRAFTER-SDK: Create Gray Patterns", + "rankName" : "Prodigy", + "replies" : " 6", + "views" : " 101", + "queryText" : "Part Number: DLP-ALC-LIGHTCRAFTER-SDK Tool/software:company C/C++ Compiler Hicompany I want to create gray patterns horizontal and vertical for structered light with dlp4500 evm but I can't use samples codes(generate_gary_code_patterns) which is in dlp-sdk?", + "partNumber" : " DLP-ALC-LIGHTCRAFTER-SDK", + "allResponseList" : [ { + "contentId" : "3320555", + "userName" : "Fizix", + "rankPoints" : "25980", + "rankName" : "Mastermind", + "date" : "Apr 19, 2020 11:10 PM", + "userId" : "15396", + "content" : "Hello Onur, I am going to get this to the team that supports the DLP4500. Fizix" + }, { + "contentId" : "3320556", + "userName" : "Vivek Thakur", + "rankPoints" : "9880", + "rankName" : "Genius", + "date" : "Apr 19, 2020 11:19 PM", + "userId" : "9052", + "content" : "Hello Onur, This SDK is not supported on DLP4500 /DLPC350. Please use the GUI to generate the pattern and drive the EVM. The other option is to use DLP3010-LC and DLP2010EVM-LC /tool/DLP2010EVM-LC or DLP3010EVM-LC with API library. regards, Vivek" + }, { + "contentId" : "3321615", + "userName" : "Onur Guzeldemirci", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 4:38 PM", + "userId" : "6300307", + "content" : "I tried but when I want to create an output image, the output image is only black. You can see this in the video recording I shot" + }, { + "contentId" : "3327239", + "userName" : "Hirak Biswas", + "rankPoints" : "8360", + "rankName" : "Expert", + "date" : "Apr 24, 2020 3:53 PM", + "userId" : "5511518", + "content" : "Hi Onur, Could you kindly provide the image to us so that we can test on our side? Thanks & Regards. Hirak." + }, { + "contentId" : "3327330", + "userName" : "Onur Guzeldemirci", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 4:55 PM", + "userId" : "6300307", + "content" : "Thank You, I solved my problem from TI's youtube videos." + }, { + "contentId" : "3327410", + "userName" : "Vivek Thakur", + "rankPoints" : "9880", + "rankName" : "Genius", + "date" : "Apr 24, 2020 6:05 PM", + "userId" : "9052", + "content" : "Onur, I am glad to hear that issue is resolved. regards, Vivek" + } ], + "tags" : [ "/support/dlp/f/94/tags/DLP4500", "/support/dlp/f/94/tags/_2300_DLP%2b%2b_2300_4500%2b_2300_DMD%2b_2300_DLP2010%2b_2300_DLP2010EVM", "/support/dlp/f/94/tags/_2300_%2bpatterns", "/support/dlp/f/94/tags/TI%2bC_2F00_C_2B002B00_%2bCompiler", "/support/dlp/f/94/tags/_2300_%2bDLP", "/support/dlp/f/94/tags/DLP_2D00_ALC_2D00_LIGHTCRAFTER_2D00_SDK" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898207.json b/data/json/DLP/898207.json new file mode 100644 index 0000000000000000000000000000000000000000..ee29f1a055909694ef6645cc1e87d4ff2ec1793c --- /dev/null +++ b/data/json/DLP/898207.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "898207", + "reporterName" : "Spider", + "rankPoints" : "330", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ27750: Some times lost control of external FETs", + "rankName" : "Intellectual", + "replies" : " 10", + "views" : " 58", + "queryText" : "Part Number: BQ27750 Hello! I has build LiPo batteris packs controlled by BQ27750. It was a big mistake to use the 27750, but it’s too late to change anything. Device work, but some times disconnect batteris from charge or from load OR from both charge and load. When I connect BQ studio to batterie pack BQ27750 says that all fine and FETs are switched on. But if I try measure resistence of external FETs - them are \"closed\" (switched off) and on GATE pin of FETs is around 2-3 volts. Nothing indicates this condition in BQ Studio. To make device back to life I sending Reset device command to BQ27750 from BQ Studio. And after this action all work fine again.... some time.... I have more than 2000 pcs devices with this problem. Problem became SOMETIMES. I can't find conditios of this. What I do wrong? And how to resolve this problem?", + "partNumber" : " BQ27750", + "allResponseList" : [ { + "contentId" : "3321797", + "userName" : "Eric Vos24", + "rankPoints" : "3585", + "rankName" : "Expert", + "date" : "Apr 20, 2020 6:39 PM", + "userId" : "3440231", + "content" : "Spider, The bq27750 can disable the FETS for numerous reasons. If after a reset the FETS are enabled then switch to disabled this leads me to believe you are triggering a time based protection event. If you want to investigate yourself, please make sure you are refreshing the registers screen in bqStudio so you can see updates as they happen. Pay specical attention to the \"Protection Status\" registers. Please provide a log file from bqStudio and a GG file from the data memory. Thanks, Eric Vos" + }, { + "contentId" : "3322261", + "userName" : "Spider", + "rankPoints" : "330", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 3:43 AM", + "userId" : "4644730", + "content" : "Ok. I'll make log when it happen again. Why voltage at Gate pins is around 2-3 volts? When FETs is off- this value is ZERO, when is on - around 12V. Why sometimes is 3v?" + }, { + "contentId" : "3324486", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 22, 2020 3:16 PM", + "userId" : "3528441", + "content" : "Hello Spider, Can you provide a scope shot and also where you are measuring? Gate pins should be zero with respect from the gate to source (in this case pack+), can you measure that voltage? I believe if the protection FETs are off, that voltage should be zero." + }, { + "contentId" : "3325502", + "userName" : "Spider", + "rankPoints" : "330", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 10:46 AM", + "userId" : "4644730", + "content" : "Before Reset but with Closed FETs: After reset and with Opened FETs (see to Log panel): xxxxx.log" + }, { + "contentId" : "3325810", + "userName" : "Eric Vos24", + "rankPoints" : "3585", + "rankName" : "Expert", + "date" : "Apr 23, 2020 3:14 PM", + "userId" : "3440231", + "content" : "Spider, In the above bqStudio image you have CUV tripeed which would cause the discharge FET to turn off. in the 2nd plot it is not set, I believe you are tripping the protection which is killing the FETS. Thanks, Eric Vos" + }, { + "contentId" : "3326549", + "userName" : "Spider", + "rankPoints" : "330", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 2:58 AM", + "userId" : "4644730", + "content" : "I understand this. But how charge device when both FETs are closed? Be careful! At above bqStudio images Charge FET are opened, BUT in real it is Closed. You can see that on photos. That is my problem! :facepalm:" + }, { + "contentId" : "3326551", + "userName" : "Eric Vos24", + "rankPoints" : "3585", + "rankName" : "Expert", + "date" : "Apr 24, 2020 3:04 AM", + "userId" : "3440231", + "content" : "Spider, this is an issue with your configuration if you are triggering a CTO and CUV. You should change CUV to recover when a charger is detected thus the CUV event will release when charging starts. I suspect the CTO timeout is way too low. this should be in 1000's of seconds. Thanks, Eric Vos" + }, { + "contentId" : "3326554", + "userName" : "Spider", + "rankPoints" : "330", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 3:07 AM", + "userId" : "4644730", + "content" : "Manual control of FETs from bqStudio not work too. In GUI I see that FET is ON but in real it is closed. It is normal?" + }, { + "contentId" : "3326585", + "userName" : "Eric Vos24", + "rankPoints" : "3585", + "rankName" : "Expert", + "date" : "Apr 24, 2020 3:48 AM", + "userId" : "3440231", + "content" : "Spider, You should not be manually controlling the FETS, but instead let the gauge do the control. You writing to manually control would not work with protection activated. Thanks, Eric Vos" + }, { + "contentId" : "3326594", + "userName" : "Spider", + "rankPoints" : "330", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 3:56 AM", + "userId" : "4644730", + "content" : "Where you see that protection is activated? I see that Charge FET is ON on first screenshot of bqStudio. But really FET is OFF." + } ], + "tags" : [ "/support/power-management/f/196/tags/_2300_bq27750", "/support/power-management/f/196/tags/_2300_fet", "/support/power-management/f/196/tags/BQ27750" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898211.json b/data/json/DLP/898211.json new file mode 100644 index 0000000000000000000000000000000000000000..5a417cf9c601b7a32f9e06a958807bf9c378b18b --- /dev/null +++ b/data/json/DLP/898211.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898211", + "reporterName" : "alikaan", + "rankPoints" : "810", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS62180: TPS62180 Step Model", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 34", + "queryText" : "Part Number: TPS62180 Hi there, I would like to use the TPS62180 IC for my power application. For layout design, I need to use the STEP model for pcb library. There is no STEP model for it. If possible, would you send it to me ? Thanks!", + "partNumber" : " TPS62180", + "allResponseList" : [ { + "contentId" : "3321379", + "userName" : "Anthony F", + "rankPoints" : "30845", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 2:42 PM", + "userId" : "1559531", + "content" : "Hi Ali, I do not see a step model available on in the tools and software page so I will see if we have one somewhere else. /product/TPS62180/toolssoftware Anthony" + }, { + "contentId" : "3323455", + "userName" : "Anthony F", + "rankPoints" : "30845", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 8:56 PM", + "userId" : "1559531", + "content" : "Hi Ali, There wasn't one existing so I have submitted a request for this to be created and will share it once I have it." + }, { + "contentId" : "3324446", + "userName" : "Anthony F", + "rankPoints" : "30845", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 2:53 PM", + "userId" : "1559531", + "content" : "STEP file is attached. Let me know if you any further help. /cfs-file/__key/communityserver-discussions-components-files/196/IC_5F00_TPS62180YZFR_5F00_DSBGA24.STEP" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS62180" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898214.json b/data/json/DLP/898214.json new file mode 100644 index 0000000000000000000000000000000000000000..003a38c77e7e15a9fe31f96c68bc258719d254e3 --- /dev/null +++ b/data/json/DLP/898214.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898214", + "reporterName" : "Kubendran G1", + "rankPoints" : "270", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM5030: Push pull converter Application circuit", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 23", + "queryText" : "Part Number: LM5030 Hicompany Team, I have below query in LM5030 Current mode push pull converter application circuit. 1)Zero frequency (Fz) formed by R14 and C18 for cancel opto pole? 2)How plant and opto pole compensated by error op amp? Regards, Kubendran", + "partNumber" : " LM5030", + "allResponseList" : [ { + "contentId" : "3321108", + "userName" : "John Griffin1", + "rankPoints" : "32175", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 11:57 AM", + "userId" : "1693693", + "content" : "Hello Kubendran G1 Your question refers to Figure 8 of the LM5030 data sheet. R14 and C18 is a high frequency filter that is placed to eliminate any switching noise pickup on the COMP input. Its function is to filter out any parasitic noise pickup due to pcb layout. It is not part of the classical feedback network. Your question on the compensation method use in this application can best be answered by studying any or all of thecompany seminary papers. These papers are located here. Regards John" + }, { + "contentId" : "3322618", + "userName" : "Kubendran G1", + "rankPoints" : "270", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 10:16 AM", + "userId" : "6226009", + "content" : "Hi Sir, Thank you for your reply. Please share any specific document for opto coupler based loop compensation. I searched slope compensation like UC1846 which is differently implemented than LM5030. For additional slope compensation how to calculate required resistor value to avoid oscillation ? Regards, Kubendran" + }, { + "contentId" : "3322915", + "userName" : "John Griffin1", + "rankPoints" : "32175", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 2:14 PM", + "userId" : "1693693", + "content" : "Hello, Please check the reference I have provided for the required information. Regards John" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM5030" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898232.json b/data/json/DLP/898232.json new file mode 100644 index 0000000000000000000000000000000000000000..886214b4dabf0e60073728d812b3fa8a23d2a814 --- /dev/null +++ b/data/json/DLP/898232.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "898232", + "reporterName" : "LIN SUN", + "rankPoints" : "310", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS61193-Q1: fault will not be triggered when SW pin exceeds max current", + "rankName" : "Intellectual", + "replies" : " 5", + "views" : " 60", + "queryText" : "Part Number: TPS61193-Q1 Dear expert: It’s found that fault will not be triggered when SW pin exceeds max current. Since application condition where the 2A limit is exceeded continuously is not allowed, does tps61193 has any mechanism to protect against this case? BTW, how to understand OCP described in “extensive fault detection feature”？", + "partNumber" : " TPS61193-Q1", + "allResponseList" : [ { + "contentId" : "3320691", + "userName" : "Charles-Chen", + "rankPoints" : "5435", + "rankName" : "Expert", + "date" : "Apr 20, 2020 3:51 AM", + "userId" : "6102657", + "content" : "Hi Lin, I have following questions according to your description. How long does your current of SW exceeds 2A last? Can you provide any waveforms?" + }, { + "contentId" : "3321033", + "userName" : "LIN SUN", + "rankPoints" : "310", + "rankName" : "Intellectual", + "date" : "Apr 20, 2020 10:42 AM", + "userId" : "5125235", + "content" : "Hi Charles To separate UVLO and OCP, my Vin is supplied by 12V, and DCDC inductor is supplied by 4V, respectively. When this 4V is decreased slowly to 2.5V, no fault is triggered. This illustrates that pin SW over current will not trigger fault. Moreover, Vin is supplied by 4V, and DCDC inductor is supplied by 12V, respectively. When this 4V is decreased to 3.95V, fault is triggered immediately. This illustrates that pin UVLO will trigger fault. So there’s no need to provide waveform. Looking forward for your reply and thanks!" + }, { + "contentId" : "3322169", + "userName" : "Charles-Chen", + "rankPoints" : "5435", + "rankName" : "Expert", + "date" : "Apr 21, 2020 1:51 AM", + "userId" : "6102657", + "content" : "Hi Lin, BTW, how to understand OCP described in “extensive fault detection feature”？ When the transient SW DC current exceeds 2A, it will lasts for 1.5s and then the current limit is automatically increased to 2.5 A for a short period of 1.5s. And then this total 3s periods repeats until thermal shutdown. To ensure the SW DC current exceeds 2A, please also provide your load current and the value of inductor when the input voltage is decreased slowly to 2.5V. I suggest that you measure the current actually. Please also note that the table 3, the SW DC current OCP is not included in the fault detection. However, if the SW DC current OCP happens, the behavior of chip is described in my first reply to your question. You can check this by measure the inductor current through current probe. Hope this helps." + }, { + "contentId" : "3325268", + "userName" : "LIN SUN", + "rankPoints" : "310", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 5:58 AM", + "userId" : "5125235", + "content" : "Hi charles Thanks a lot! Surely SW current decreases and backlight darkened as VIN decreased to 2.5V, as you said. OCP is not triggered because no thermal down happened in my application." + }, { + "contentId" : "3325273", + "userName" : "Charles-Chen", + "rankPoints" : "5435", + "rankName" : "Expert", + "date" : "Apr 23, 2020 6:06 AM", + "userId" : "6102657", + "content" : "Hi Lin, Great! Please click the \"resolved\" and I will close this thread." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS61193", "/support/power-management/f/196/tags/TPS61193_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898236.json b/data/json/DLP/898236.json new file mode 100644 index 0000000000000000000000000000000000000000..1c6b842db37ac8f4b829e099f753db668b40cb84 --- /dev/null +++ b/data/json/DLP/898236.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "898236", + "reporterName" : "Andrew Dunlop", + "rankPoints" : "120", + "resolutionStatus" : "Resolved", + "ticketName" : "LM5119: Odd behavoiur in interleaved mode", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 17", + "queryText" : "Part Number: LM5119 I have an LM5119 based design, with interleaved operation (single output). The output is well regulated and stable and the switching waveforms look good. However, I notice that that side 2 of the converter stops switching when the input voltage goes above 50V. When the input voltage is reduced below 50V, side 2 starts switching again. Side 1 does not exhibit this behaviour. The EN2 pin is NC (so side 2 is always enabled). These tests are being performed at no load. What are possible reasons that this could occur? I ask, because this behaviour is eventually followed by catastrophic failure of the LM5119, and I am suspicious that this unexpected behaviour is a clue as to what is going on. Catastrophic failure always occurs at higher voltages, although I have now seen it at 50V input voltage. The switch node ringing is well controlled and does not go anywhere near the device's 65V rating. Kind regards, Andrew", + "partNumber" : " LM5119", + "allResponseList" : [ { + "contentId" : "3321198", + "userName" : "Qian Chen", + "rankPoints" : "21370", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 1:08 PM", + "userId" : "1501908", + "content" : "Hi Andrew, Can you provide schematic in pdf file? Thanks Qian" + }, { + "contentId" : "3322238", + "userName" : "Andrew Dunlop", + "rankPoints" : "120", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 3:11 AM", + "userId" : "3221373", + "content" : "Hi Qian, Thanks for responding so quickly. I have found the problem. I have an extra resistor feeding the summing node at the centre of the potential divider that drives the FB node. This is driven by a D2A and allows mer to pull the voltage. Because it comes from a long trace, I thought it would be wise to have a capacitor to ground at the end of this line, just before the extra summing resistor. Unfortunately the ground I chose was close to of one of the half-bridges, and therefore subject to high current, and was probably introducing switching noise into the summing node. I suspect that this is what was causing the odd behavior. When I removed the capacitor, the whole system became docile again and no further catastrophic events have been observed, even at maximum input voltage with large step changes from the D2A. It would seem to be far better to (a) not introduce noise at this rather critical point in the circuit, and (b) allow the loop filter to do its job. Kind regards, Andrew" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM5119" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898256.json b/data/json/DLP/898256.json new file mode 100644 index 0000000000000000000000000000000000000000..689b4116c1e3615c70608ac6299494885d0843e9 --- /dev/null +++ b/data/json/DLP/898256.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898256", + "reporterName" : "user4657807", + "rankPoints" : "40", + "resolutionStatus" : "Resolved", + "ticketName" : "UCC28950：Output short circuit protection and over current protection", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 43", + "queryText" : "Part Number: UCC28950 Can this IC provide DCDC output short-circuit protection and over-current protection? What is achieved by? Is it achieved by cycle-by-cycle current limit or peak-current mode control?", + "partNumber" : " UCC28950", + "allResponseList" : [ { + "contentId" : "3320948", + "userName" : "Colin Gillmor", + "rankPoints" : "22565", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 8:53 AM", + "userId" : "1139376", + "content" : "Hello The UCC28950 and UCC28951 both provide over current and short circuit protection. Please have a look at the section of the Data Sheet dealing with this topic - I've included the most relevant information below. If the signal at the CS pin plus the added slope compensation ramp (see Fig 36 in the DS) reaches 2V the Cycle-by-Cycle ILIM comparator trips and terminates the switching cycle. As this overload condition persists then the SS/EN pin is discharged and switching stops once the SS/EN pin drops below the Hiccup threshold (typ 3.6V). Note that this mechanism is active in both Voltage Control Mode and in Peak Current Control mode. Regards Colin" + }, { + "contentId" : "3323874", + "userName" : "user4657807", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 6:48 AM", + "userId" : "4657807", + "content" : "Alright, thank you very much. It's just not quite certain that short circuit protection can be achieved by primary limitation. In my understanding, secondary direct shutdown is reliable. Now I'm sure." + }, { + "contentId" : "3323917", + "userName" : "Colin Gillmor", + "rankPoints" : "22565", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 7:36 AM", + "userId" : "1139376", + "content" : "Hello Output SHORT CIRCUIT protection using the primary current works and is effective and uses the primary current sensing network which is needed in any case for peak current mode control (PCM) or for current limiting (Voltage Mode) so that there are no added circuit components. Hiccup modes reduce the average power dissipation while in short circuit but if you are using the primary current to control the output then the currents during the active part of the hiccup will be larger as Vin increases and smaller as Vin decreases. Normally Vin is from a PFC stage so Vin is relatively fixed so this behaviour is not a problem. If Vin varies over a wide range then it might be necessary to add a separate output current limiting circuit, but you will still need to sense the primary current for control purposes. Regards Colin" + } ], + "tags" : [ "/support/power-management/f/196/tags/HSA", "/support/power-management/f/196/tags/UCC28950" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898258.json b/data/json/DLP/898258.json new file mode 100644 index 0000000000000000000000000000000000000000..ff4f883849cf837c039932187c515376155f0e32 --- /dev/null +++ b/data/json/DLP/898258.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898258", + "reporterName" : "Mitchel Szazynski", + "rankPoints" : "170", + "resolutionStatus" : "", + "ticketName" : "MMWAVE-STUDIO: FTDI Drivers refuse to install (AWR1642 BOOST)", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 41", + "queryText" : "Part Number: MMWAVE-STUDIO Hello, I am trying to download MMWave studio, and I keep getting the \"FTDI drivers not installed\" error. I see on a previous forum question, that someone managed to get around this issue by deactivating windows driver signature... is this still the only way to fix the issue? I have never done that before and am slightly concerned about the ramifications, and whether IT will allow it.", + "partNumber" : " MMWAVE-STUDIO", + "allResponseList" : [ { + "contentId" : "3320789", + "userName" : "Jitendra Gupta", + "rankPoints" : "33995", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 6:18 AM", + "userId" : "1717369", + "content" : "Hello Mitchel, You can refer below thread- /support/sensors/f/1023/p/857683/3171986#3171986 Regards, Jitendra" + }, { + "contentId" : "3324793", + "userName" : "Mitchel Szazynski", + "rankPoints" : "170", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 6:37 PM", + "userId" : "4896878", + "content" : "Thanks--can you give a quick word of instruction on how to install? I tried dragging the ftdi folder in the zip provided on here into the mmwave studio folder under the C/Ti to replace the old FTDI folder, but when I ran the install package again, it still gave the same error." + }, { + "contentId" : "3329276", + "userName" : "Lenio Cacula", + "rankPoints" : "12660", + "rankName" : "Genius", + "date" : "Apr 27, 2020 5:47 PM", + "userId" : "1938487", + "content" : "Mitchel, after copying the files over, have you tried updating the driver through Device Manager? Just right click on the device and follow the instructions to point to the location where they are saved. Lenio" + } ], + "tags" : [ "/support/sensors/f/1023/tags/AWR1642", "/support/sensors/f/1023/tags/MMWAVE_2D00_STUDIO", "/support/sensors/f/1023/tags/awr20_5F00_p2_5F00_hwa20_5F00_ftdi" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898265.json b/data/json/DLP/898265.json new file mode 100644 index 0000000000000000000000000000000000000000..6207234286067f9b8dd4f5e4bd613b39a76a1089 --- /dev/null +++ b/data/json/DLP/898265.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "898265", + "reporterName" : "user6060721", + "rankPoints" : "345", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "PGA460: Capture Analog echo data form PGA460", + "rankName" : "Intellectual", + "replies" : " 11", + "views" : " 79", + "queryText" : "Part Number: PGA460 How many ways to Capture Analog echo data form PGA460? I want to extract eigenvalues of echo data,and process the echo data. 1) Test pin? What is the abbreviation of ASC 2)Echo data dump from UART? 3)Echo data dump from USART? How can I set and operate?", + "partNumber" : " PGA460", + "allResponseList" : [ { + "contentId" : "3321709", + "userName" : "Akeem Whitehead", + "rankPoints" : "21215", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 5:33 PM", + "userId" : "3766999", + "content" : "user6060721, There are three methods of extracting the echo envelope data from the PGA460 as you've noted: 1) Analog output: If you want to use your own ADC to capture the amplified analog output, then set the TEST_MUX value to 0x01, and capture from the TEST pin. 2) Echo data dump: The PGA460 stores 128 bytes of the echo envelope time of flight activity. This is a heavily down sampled version of the digital signal processed output to help users to locally set the threshold values. If you don't require a high resolution capture of the post-DSP output, then use this output. You will need to set DATADUMP_EN=1, send a Preset 1 or 2 burst//listen command (CMD 0-3), wait the equivalent record length time, then read back the Echo data dump by sending CMD 7. This can be done through UART, USART (SPI), or OWU. 3) Direct data burst capture (USART/SPI only): This mode can provide the ADC output at an 8-bit 1MHZ rate or 12-bit 500kHz rate. The PGA460 does not locally buffer any of the direct data burst, so you will need an MCU or external memory to store the clocked out data in real time. This mode is recommended for users that intend on applying their own DSP routine. This is similar to the analog output, but will be digitized for you by the PGA460, removing the need for an external ADC. This mode will require you to send a Preset 1 or 2 burst/listen command through SPI, then immediately afterwards continuously send an 8MHz clock signal the SPI-SCLK pin to get envelope data from the SPI-MISO pin." + }, { + "contentId" : "3322178", + "userName" : "user6060721", + "rankPoints" : "345", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 2:00 AM", + "userId" : "6060721", + "content" : "Thanks. When we use debug tool PGA460-Q1 EVM，the tool used Echo data dump through UART to capture the Echo envelope. Is this right?" + }, { + "contentId" : "3322207", + "userName" : "user6060721", + "rankPoints" : "345", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 2:31 AM", + "userId" : "6060721", + "content" : "What is the signal path of Echo data dump，thanks" + }, { + "contentId" : "3322309", + "userName" : "Akeem Whitehead", + "rankPoints" : "21215", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 5:22 AM", + "userId" : "3766999", + "content" : "user6060721, Yes, the PGA460-Q1 EVM GUI defaults to displaying the Echo Data Dump plot through UART, which is the output stage of the nonlinear scaling block (last stage of DSP) from Figure 35. To change the GUI graph mode to the Direct Data Burst (USART/SPI) output, you can go to Data Monitor --> Graph --> Graph Mode, and select which Direct Data Burst output stage you want to display (ADC output or a DSP stage). Note, the GUI takes a couple of seconds to capture the Direct Data Burst data, so please wait and don't think the GUI has crashed. The longer the record length time, the longer the update time after clicking START." + }, { + "contentId" : "3324070", + "userName" : "user6060721", + "rankPoints" : "345", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 10:17 AM", + "userId" : "6060721", + "content" : "When I debug my own PGA460 device. After I load memory Map,I can not connect PGA460 through OWU interface. memory map is the attachment. GRID_USER_MEMSPACE-2020-03-13_audiowell_58K_280cm.txt" + }, { + "contentId" : "3324172", + "userName" : "user6060721", + "rankPoints" : "345", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 12:07 PM", + "userId" : "6060721", + "content" : "And when I load memory map successfully，the threshold is wrong. So,I have two confuse： 1.What is the right procedure of connect PGA460 through OWU 2.When debug through OWU，can I load or save memory map，how is the right procedure？ The user guide is very brief about OWU debug， thanks" + }, { + "contentId" : "3326070", + "userName" : "Akeem Whitehead", + "rankPoints" : "21215", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 5:42 PM", + "userId" : "3766999", + "content" : "user6060721, When I checked your register map text file, I found that address 0x1E is set to a value of 0x0F. You need to change this value to 0x8F so that the IO_IF_SEL bit is set to '1' for One-Wire UART mode. Right now it is indicating to use IO-TCI mode, which is why you may be experiencing difficulties loading the file. You can save and load the register map text file by OWU through the Memory Map page just as you would in UART mode. Please see the PGA460-Q1 EVM GUI's OWI Evaluation for an External Module (Video Demonstration): PGA460-EVM-GUI-OWIEvaluation-VideoDemo.zip on the PGA460 E2E FAQ.page for additional details on running the GUI in OWU mode." + }, { + "contentId" : "3326956", + "userName" : "user6060721", + "rankPoints" : "345", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 11:53 AM", + "userId" : "6060721", + "content" : "Akeem Whitehead: I can read EDD through OWU.My GUI is Rev.1.0.2.0 But when I reload my memory map(the memory map is saved by OWU mode in GUI),but GUI display incorrect. especially the Theshold，can not load from the memory map.When I click T-to-U，there is an error. GRID_USER_MEMSPACE-2020-04-24_194009.txt" + }, { + "contentId" : "3327694", + "userName" : "Akeem Whitehead", + "rankPoints" : "21215", + "rankName" : "Mastermind", + "date" : "Apr 25, 2020 12:24 AM", + "userId" : "3766999", + "content" : "user6060721, Note that the \"T-to-U\" button means \"copy threshold register values to USER_DATAx register values\". You don't want to use this button if you are attempting to load the threshold values to the Threshold tab of the GUI. When you load the memory map txt file, the Threshold tab values should update automatically, though you may have found a GUI bug. Try these steps: When you first start the OWI mode of the GUI, the first thing you should do is toggle any of the threshold values under the Threshold tab. For example, click up or down on P1 Time 1. Run burst/listen command using the RUN button. The echo data dump and thresholds should now be displayed. The threshold will be random since the threshold values have been properly loaded yet. After the first burst/listen command, then try loading the txt file in the Memory Map page. The correct threshold time and level values should now show under the Threshold tab. Let me know if this works. I will check my GUI code to see where a potential bug may exist." + }, { + "contentId" : "3327932", + "userName" : "user6060721", + "rankPoints" : "345", + "rankName" : "Intellectual", + "date" : "Apr 26, 2020 1:59 AM", + "userId" : "6060721", + "content" : "Akeem Whitehead, 1.When I first start the OWI,I adjust threshlod P1 time1 from 600 to 1400, 2.After run burst and listen,threshold change to 1400 all. 3.After I Load memory map,there is a note,I clicked yes. 4.After restart,the threshold is wrong 5.Attachment is my memory mapGRID_USER_MEMSPACE-2020-04-24_194009_OWU.txt" + } ], + "tags" : [ "/support/sensors/f/1023/tags/PGA460" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898268.json b/data/json/DLP/898268.json new file mode 100644 index 0000000000000000000000000000000000000000..79541b7eb2c5fd88f83f5c6d846e511ea508bce3 --- /dev/null +++ b/data/json/DLP/898268.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898268", + "reporterName" : "Vu Tran27", + "rankPoints" : "335", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ28Z610: Learning cycle for battery replacement?", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 24", + "queryText" : "Part Number: BQ28Z610 Hello, My product has a removable battery pack, and the bq28z610 is mounted on the application side. What should I do if I don't want to reprogram the golden file every time the battery is replaced? Can I instruct the customers to run a full discharge-relax-charge-relax-discharge-relax cycle after replacing the battery (Qmax would be capped by the Qmax delta I guess)? Or can I write some parameters (just the Qmax Cells and Qmax Pack are needed to change right?) to the bq28z610 data memory (customers can only replace with new batteries in this case)? Thanks.", + "partNumber" : " BQ28Z610", + "allResponseList" : [ { + "contentId" : "3321564", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 4:12 PM", + "userId" : "1864278", + "content" : "The bq28z610 is a pack side gauge. It should reside within the battery pack or on the main board of the system with non-removable batteries. You need to use a system side gauge for a removable battery pack. I would suggest you program the golden file since your customers replace the batteries with new ones. Andy" + }, { + "contentId" : "3321687", + "userName" : "Vu Tran27", + "rankPoints" : "335", + "rankName" : "Intellectual", + "date" : "Apr 20, 2020 5:15 PM", + "userId" : "5355007", + "content" : "Is the option to rewrite specific parameters to bq28z610 data memory feasible? If yes, what parameters should I rewrite?" + }, { + "contentId" : "3323522", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 10:20 PM", + "userId" : "1864278", + "content" : "I would suggest you dump a dt.fs file and then program this file to the gauge device. Bascially, you just program the entire data flash. Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ28Z610" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898269.json b/data/json/DLP/898269.json new file mode 100644 index 0000000000000000000000000000000000000000..43c27aa5326cc04a757b7e27ff3e184dcd42b862 --- /dev/null +++ b/data/json/DLP/898269.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898269", + "reporterName" : "Sajna K", + "rankPoints" : "170", + "resolutionStatus" : "", + "ticketName" : "TPS62007: Can i connect 100uF at the output", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 26", + "queryText" : "Part Number: TPS62007 hi i have a requirement that Vin 5V, Vout 3.3V, Io 375mA I have a load which is having 100uF at its input. this Buck converter output is given to the load. my Buck converter should have current limiting property to avoid inrush current. Also it should not have output discharge function. Because input to the load should stay for min 500ms through the 100uF. i have selected TPS62007. can i connect 100uF at its output? if you have any other solution let me know", + "partNumber" : " TPS62007", + "allResponseList" : [ { + "contentId" : "3320918", + "userName" : "Excel Regidor", + "rankPoints" : "4000", + "rankName" : "Expert", + "date" : "Apr 20, 2020 8:26 AM", + "userId" : "5934704", + "content" : "Hi Sajna, If you intend to use 100uF output capacitor, please check the phase margin and it should be higher or equal to 40 deg. at minimum and max ambient temperature to ensure the control loop is stable. Best regards, Excel " + }, { + "contentId" : "3320928", + "userName" : "Sajna K", + "rankPoints" : "170", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 8:32 AM", + "userId" : "6015227", + "content" : "Thank you for the reply :) Do you have any application note to calculate the phase margin as you mentioned? Also Do you have any suggestion on othercompany parts ,which is suitable to my application?" + }, { + "contentId" : "3322663", + "userName" : "Excel Regidor", + "rankPoints" : "4000", + "rankName" : "Expert", + "date" : "Apr 21, 2020 11:31 AM", + "userId" : "5934704", + "content" : "Hi Sajna, There is no calculation to determine the phase margin. It requires actual bode plot measurement (see attached file). 3326.bode plot measurement_snva364a.pdf Are you looking for a P2P replacement or as long as it fits requirement? Please provide your key parameters/specs so I can provide a suitable alternate part. Best regards, Excel" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS62007" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898271.json b/data/json/DLP/898271.json new file mode 100644 index 0000000000000000000000000000000000000000..42a4c5e36eeb0b9b7c3d864dfd5485425086c15f --- /dev/null +++ b/data/json/DLP/898271.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "898271", + "reporterName" : "user6294971", + "rankPoints" : "60", + "resolutionStatus" : "", + "ticketName" : "TPS61236P: The output can't reach the set value", + "rankName" : "Prodigy", + "replies" : " 10", + "views" : " 55", + "queryText" : "Part Number: TPS61236P Hi, I have built a li-ion to 5V @ 4A constant current DC converter using TPS61236P (the circuit and most of the resistor and capacitor values come from WEBENCH while some changed a little) but it turned out that the output can't reach the set value. I connected a 3.33Ohm resistor as a load, and the current should be 1.5A, but the output current was around 1A and the voltage was around 3.3V ---- even lower than the 3.8V input! The schematic and both side of the layout are attached. Thank you so much.", + "partNumber" : " TPS61236P", + "allResponseList" : [ { + "contentId" : "3320739", + "userName" : "Zack Liu", + "rankPoints" : "12495", + "rankName" : "Genius", + "date" : "Apr 20, 2020 5:25 AM", + "userId" : "4961181", + "content" : "Hi, Have you tried applied the 3.3ohm resistor load after the Vout reaches 5V? It may triggers the pre-charger current limit during startup. That's why the Vout is clamped at low level. Besides that, the output capacitor C4 placement is not recommended. The IC GND pin is not connected to C4 GND pad directly." + }, { + "contentId" : "3321007", + "userName" : "user6294971", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 10:04 AM", + "userId" : "6294971", + "content" : "Hi Zack Liu, Thank you so much for quick reply. I applied the 3.33ohm resistor load after the Vout did reach 5V really. Actually, I always apply load to the converter several seconds or longer after the converter is powered. As for the output capacitor C4, did you mean that three 22uF replaced by one 100uF is not recommended? As for the GND pad layout, I will fix it later. Thanks a lot." + }, { + "contentId" : "3321026", + "userName" : "user6294971", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 10:31 AM", + "userId" : "6294971", + "content" : "By the way, the output behavior is same when I disable CC by shorting C1 & R3." + }, { + "contentId" : "3322248", + "userName" : "Zack Liu", + "rankPoints" : "12495", + "rankName" : "Genius", + "date" : "Apr 21, 2020 3:26 AM", + "userId" : "4961181", + "content" : "Hi, So you mean if no load the Vout is correct of 5V. When the 3.33 ohm is applied at output, the Vout drops to 3.3V? Please make sure the input 3.8V has enough current capability. For this case, the input current should be at least 5V*4A/3.8V/0.9=5.05A. What's the part number of this 100uF capacitor? Usually paralleling three ceramic capacitors would have lower ESR and ESL, so the output voltage ripple would smaller. But this should not be the root cause of the output voltage drop. Please also let me know the part number of inductor. Thanks." + }, { + "contentId" : "3322614", + "userName" : "user6294971", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 10:11 AM", + "userId" : "6294971", + "content" : "Hi Zack Liu, Zack Liu So you mean if no load the Vout is correct of 5V. When the 3.33 ohm is applied at output, the Vout drops to 3.3V? Yes, so as you said. As for the 3.8V power supply, whether it can output 5A has not been tested. But when I apply 3.33ohm to the converter, no significant voltage drop of 3.8V power supply was found. It seemed that its current capability is enough, but maybe only for the 3.33ohm load. The 100uF capacitor is made by TAIYO YUDEN and its part number is JMK316BJ107ML-T. The inductor is made by TDG (not TDK! ) and its part number is TMAX-0630-1R0-M. Thanks a lot." + }, { + "contentId" : "3323708", + "userName" : "Zack Liu", + "rankPoints" : "12495", + "rankName" : "Genius", + "date" : "Apr 22, 2020 2:59 AM", + "userId" : "4961181", + "content" : "Hi, For a boost converter, the output voltage is higher than input voltage so the input current needs to be higher than output current. In your case, like I said, the input power supply should have 5A capability. If you test it with a 3.33ohm, you only approve it can output 3.8V/3.33=1.14A. You can use a external power supply to test the board first. Secondly, the 100uF capacitor JMK316BJ107ML-T voltage rating is only 6.3V. By searching the capacitor datasheet, the effective capacitance is only (1-70%)*100uF=30uF. It's OK for this application. But ripple may be high. If possible, use three 10V voltage rating capacitors in parallel so that total effective capacitance is higher. The inductor is OK. If the Vout still drops when a 3.33ohm load is applied, can you probe the SW, Vout, Vin with digital oscilloscope and share the waveform. Thanks." + }, { + "contentId" : "3328199", + "userName" : "Zack Liu", + "rankPoints" : "12495", + "rankName" : "Genius", + "date" : "Apr 27, 2020 1:35 AM", + "userId" : "4961181", + "content" : "Hi, Is there any update?" + }, { + "contentId" : "3328277", + "userName" : "user6294971", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 4:54 AM", + "userId" : "6294971", + "content" : "Hi Zack Liu, I've got the waveforms of different loads, from 10 ohm to 2 ohm. The channel 1 is Vout and the channel 2 is the SW. At this time, things are a little different. When the load resistance is 3.33 ohm or higher, the waveforms were basically good, while the load was 2 ohm, Vout dropped to nearly 2.5V and the waveform became abnormal. The power supply had been replaced by a Li-ion battery which is used for drones before this test. It can output dozens of amps and I believe it's enough. The waveform are attached below. Thanks a lot." + }, { + "contentId" : "3328285", + "userName" : "user6294971", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 5:08 AM", + "userId" : "6294971", + "content" : "Errata: user6294971 The channel 1 is Vout and the channel 2 is the SW. The channel 0 is Vout and the channel 1 is the SW. By the way, the parts of the circuit had not been changed, including C4." + }, { + "contentId" : "3328319", + "userName" : "Zack Liu", + "rankPoints" : "12495", + "rankName" : "Genius", + "date" : "Apr 27, 2020 5:50 AM", + "userId" : "4961181", + "content" : "Hi, Thanks for sharing the test waveform. The main reason would be the output capacitor layout, like I said in the first reply one week ago. The test waveform shows the device would work with no issue at low load current condition.But when load current is high, during switching, the output capacitor charging path is too long shown in below picture. The current will flow through Vout pin, Cout C4, and back to GND pin through a very long trace. This will introduce a big PCB parasitic inductance and cause device works abnormally. Thus, the feedback network R4, R5, C2 placement is not good. These components should be placed close to IC with short trace because FB pin is very sensitive to noise." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS61236P" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898272.json b/data/json/DLP/898272.json new file mode 100644 index 0000000000000000000000000000000000000000..01c82354ead195a056d8bf7e34be758224a2c7a4 --- /dev/null +++ b/data/json/DLP/898272.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "898272", + "reporterName" : "svgl", + "rankPoints" : "90", + "resolutionStatus" : "", + "ticketName" : "BQ2060A: Control external FET switches for power using CFC and DFC", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 24", + "queryText" : "Part Number: BQ2060A Hi. I'm planning to use BQ2060A integrated circuit in my design. However, I couldn't see any reference design that shows how to control external FET switches for power mosfets to protect IC. Are there any information about switching power mosfets or any reference design? Thanks in advance.", + "partNumber" : " BQ2060A", + "allResponseList" : [ { + "contentId" : "3321659", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 5:02 PM", + "userId" : "1864278", + "content" : "The BQ2060A is an old device. I would suggest you use a newer device instead(e.g. bq4050), which has better EVM, software and firmware support. Andy" + }, { + "contentId" : "3322369", + "userName" : "svgl", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 6:16 AM", + "userId" : "6158204", + "content" : "I could not change my system that use BQ2060A. My design is based on BQ2060A so I need to use another IC to control power mosfets and cell balancing etc. Would it be a problem if I use BQ2060A and BQ78Z100 (as controller and protector) together? Thanks." + }, { + "contentId" : "3323366", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 7:33 PM", + "userId" : "1864278", + "content" : "These two are both gauges. I don't think it is a good idea to use two gauges at the same time. Andy" + }, { + "contentId" : "3323831", + "userName" : "svgl", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 6:13 AM", + "userId" : "6158204", + "content" : "As I said before I can't change BQ2060A. What would you offer to protect 2 series Li-ion battery with cell balancing support?" + } ], + "tags" : [ "/support/power-management/f/196/tags/bq2060A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898274.json b/data/json/DLP/898274.json new file mode 100644 index 0000000000000000000000000000000000000000..ca20e9df0aec1565e84d382f840d7851ac4cf486 --- /dev/null +++ b/data/json/DLP/898274.json @@ -0,0 +1,87 @@ +{ + "ticketNumber" : "898274", + "reporterName" : "user3498266", + "rankPoints" : "70", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS659411EVM: PMIC TPS65941X", + "rankName" : "Prodigy", + "replies" : " 9", + "views" : " 45", + "queryText" : "Part Number: TPS659411EVM Hi all, I am designing the J7 platform base on SOC:DRA829 and PMICA:TPS659413 and PMICB:TPS659411, we are designing the SOP products, there is something need your help: 1 What is the timing sequence between VCCA(3V3),nPWRON/ENABLE of PMICA and VOUT_LDOVINT of PMICA? since I think the input signal nPWRON/ENABLE will be behind the output signal VOUT_LDOVINT which will ensure the synchronization of PMICA and PMICB, can you provide me with the exactly number of the time sequency? 2 According tocompany reference design: J7 EVM board, only PMICA have the wakeup function from GPIO4, and PMICB will follow the standard startup sequence process(like high level input signal on nPWRON/ENABLE) , my quension is that in real SOP product is the PMICB in this design can will be wakeup from the LP_standby state?we need to meet the quiescent current requirement. thanks! Best Regards,", + "partNumber" : " TPS659411EVM", + "allResponseList" : [ { + "contentId" : "3321469", + "userName" : "Nastasha", + "rankPoints" : "6780", + "rankName" : "Expert", + "date" : "Apr 20, 2020 3:21 PM", + "userId" : "4056350", + "content" : "Hi, VCCA is the power for PMIC A and PMIC B. Once this pin is supplied, the device internal regulators will also be supplied (LDOVINT and LDOVRTC). Then, the PMIC will load the default NVM settings from memory and wait in STANDBY mode. For the devices to turn on, use the ENABLE pin of PMIC A. This will cause both PMIC devices output rails to execute the power sequence to supply the Jacinto 7 processor. The PMIC A and PMIC B devices stay in sync through their SPMI communication (connecting GPIO_5 and GPIO_6 between the two devices). For full features of the power architecture for Jacinto 7, see our user guide: /lit/pdf/slvubr0 Thanks, Nastasha" + }, { + "contentId" : "3322489", + "userName" : "user3498266", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 8:08 AM", + "userId" : "3498266", + "content" : "Nastasha, Thanks for you answer! I have look through the document, there is someting useful for me, but I still has some questions. I would like to disscuss with your for the following 3 conditions, 1 First Startup( from power off to power on) 2 Wakeup(from LP_standby mode to normal mode) 3 Power off(From normal mode to LP_standby mode) I want to know the timing relationship of EN, LDOVINT of both PMICA and PMICB as well as the data communication state duing the change of the state of EN, LDOVINT in the 3 conditions each other! The figure description is preferred. thanks! Best Regards," + }, { + "contentId" : "3323123", + "userName" : "Nastasha", + "rankPoints" : "6780", + "rankName" : "Expert", + "date" : "Apr 21, 2020 4:08 PM", + "userId" : "4056350", + "content" : "Hi, We have a diagram in the datasheet that is called \"Device Startup Timing\". This refers to the times that it takes to startup. These values depicted in the diagram are also specified in the specs section of the datasheet. Note that these specs will tell you the time from OFF to STANDBY. OFF to ACTIVE timing depends on how and when you are enabling the transition to the active state with the ENABLE pin. LDOVINT and LDOVRTC are included in this diagram. Power off timing will depend on the power sequence executing (whether it is an immediate or sequenced power down event). These timing are depicted in the user guide I previously shared. LP_STANDBY to STANDBY will go through BIST before going into the standby state, so only that timing will need to be considered to go to standby state. STANDBY to ACTIVE state timing is dependent on the power up sequence timing shown in the user guide. Please let me know if this helps. Thanks, Nastasha" + }, { + "contentId" : "3323961", + "userName" : "user3498266", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 8:14 AM", + "userId" : "3498266", + "content" : "Nastasha, The Figure 5-5 solved my first question of first start up timing sequence, but I haven't see the wakeup timing sequence since in wakeup state it is something different from first startup, eg., the VCCA is always on, when the CAN wakup signal in, the system will execute the NVM first or wakeup the VINT & VRTC first? And at this time when will the Valid On Request signal be active? before NVM or after NVM? Thanks! Best Regards," + }, { + "contentId" : "3324773", + "userName" : "Nastasha", + "rankPoints" : "6780", + "rankName" : "Expert", + "date" : "Apr 22, 2020 6:17 PM", + "userId" : "4056350", + "content" : "Hi, I think I understand your question. This is how you turn on the system: 1. VCCA is powered 2. CAN event turns on the PMICs (pulls ENABLE pin high or uses GPIO wakeup functionality) Please let me know if I interpreted this correctly. In this case, once VCCA is powered, LDOVINT and LDOVRTC will be immediately powered. Then, NVM will load. Then BIST will run. Then, the device will wait for the CAN event. Once the CAN event occurs, the power sequence will start immediately. If the CAN event happens earlier, the device will wait until the previous steps are done, and then begin powering up. The first steps take 5-10ms (each step is more precisely defined in the datasheet). Then the power sequence takes ~15ms. If the CAN event happens at least 5ms after power is supplied to the PMIC, then there shouldn't be any delay. The only exception is if the CAN is waking up the device from LP_STANDBY. Then, the device will go through BIST before powering up. There is a figure in the datasheet (5-38) that may also help explain these scenarios. Let me know if this helps! Thanks, Nastasha" + }, { + "contentId" : "3325546", + "userName" : "user3498266", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 11:47 AM", + "userId" : "3498266", + "content" : "Nastasha, Thanks for your reply. As for this scenaria- Wakeup from LP_STANDBY state, my understanding is firstly the CAN_WAKEUP signal will be asserted, then system of PMICA will go through NVM and BIST before powering up, then LDOVINT active, then PMICB Enable(at the same time the PMICA will be also enable by an external control signal), then PMICB go through NVM and BIST, then by comunication of SPMI(I2C) the two PMICs will work synchronous,is it right? Best Regards," + }, { + "contentId" : "3326964", + "userName" : "user3498266", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 11:59 AM", + "userId" : "3498266", + "content" : "Nastasha, Could you help to check if my understanding is right or wrong? Thanks! Best Regards," + }, { + "contentId" : "3327466", + "userName" : "Nastasha", + "rankPoints" : "6780", + "rankName" : "Expert", + "date" : "Apr 24, 2020 7:00 PM", + "userId" : "4056350", + "content" : "Hi, When waking up from LP_STANDBY, the LDOVINT of PMIC A will turn on immediately, which will also enable PMIC B (since LDOVINT of PMIC A is connected to ENABLE of PMIC B). Then, both devices will load NVM and complete BIST in parallel. Then, through SPMI communication they will start the power up sequence together. Hope this helps! thanks, Nastasha" + }, { + "contentId" : "3327688", + "userName" : "user3498266", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 25, 2020 12:07 AM", + "userId" : "3498266", + "content" : "Nastasha, Thanks! Best Regards," + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS659411EVM" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898285.json b/data/json/DLP/898285.json new file mode 100644 index 0000000000000000000000000000000000000000..b62eee306bc3d9396830a7e85fb61d0276209e16 --- /dev/null +++ b/data/json/DLP/898285.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898285", + "reporterName" : "Shaquille Chen", + "rankPoints" : "1530", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS62130: What's the negative transient spec for SW node", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 19", + "queryText" : "Part Number: TPS62130 Dear Team, Customer want to know what's the negative transient spec for SW node. TPS62130 datasheet only have constant voltage spec. They are looking for transient spec. like shown in TPS53318. ( -7V, <20ns) Shaq", + "partNumber" : " TPS62130", + "allResponseList" : [ { + "contentId" : "3321151", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Apr 20, 2020 12:37 PM", + "userId" : "24596", + "content" : "Shaq, Unfortunately, it is not specified. If you post a waveform, I can give you my opinion." + }, { + "contentId" : "3321302", + "userName" : "Shaquille Chen", + "rankPoints" : "1530", + "rankName" : "Intellectual", + "date" : "Apr 20, 2020 2:11 PM", + "userId" : "4475474", + "content" : "Hi Tucker, Here is customer's waveform. There are 6.5ns duration lower than -0.3V." + }, { + "contentId" : "3322067", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Apr 20, 2020 11:11 PM", + "userId" : "24596", + "content" : "Shaq, That looks about normal. If you use a differential probe (preferred method) you will see it significantly reduced." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS62130", "/support/power-management/f/196/tags/tps53318" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898296.json b/data/json/DLP/898296.json new file mode 100644 index 0000000000000000000000000000000000000000..4fc1b8dd9938e5a6d31acab6c434ee8970020928 --- /dev/null +++ b/data/json/DLP/898296.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898296", + "reporterName" : "Kazuki Kitajima", + "rankPoints" : "770", + "resolutionStatus" : "Resolved", + "ticketName" : "LM2596: feedforward capacitor selection", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 19", + "queryText" : "Part Number: LM2596 Hello team! I got the question for \"cff\" from the customer. The datasheet shows Equation6 and uses the 15.4k for R2 for example. However, the calculated value and the recommended value look different... Which value should we use for the actual design? Best Regards, Kazuki Kitajima", + "partNumber" : " LM2596", + "allResponseList" : [ { + "contentId" : "3320966", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 20, 2020 9:19 AM", + "userId" : "3498075", + "content" : "Hi Kazuki, I will check and update you later. B R Andy" + }, { + "contentId" : "3321432", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 3:03 PM", + "userId" : "1881345", + "content" : "The equation is mostly an approximation to get a starting value for the CFF. The values in the table have been tested for best overall performance. I would plan on using the values in the table. However, the point of the equation is to ensure that the user leaves a footprint on the PCB for a feed-forward capacitor if needed. The actual value can be adjusted to optimize performance in the actual application." + }, { + "contentId" : "3322280", + "userName" : "Kazuki Kitajima", + "rankPoints" : "770", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 4:21 AM", + "userId" : "5298707", + "content" : "Andy-san, Frank-san, Thank you for your advice! I'll let the customer know table3 value should be good for. Best Regards, Kazuki Kitajima" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM2596" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898303.json b/data/json/DLP/898303.json new file mode 100644 index 0000000000000000000000000000000000000000..8d64f7b3912f8bcde904959e5f0c13f6938076c1 --- /dev/null +++ b/data/json/DLP/898303.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "898303", + "reporterName" : "Michiaki Tanii", + "rankPoints" : "1600", + "resolutionStatus" : "Resolved", + "ticketName" : "UC3525A: Regarding RT, CT and RD", + "rankName" : "Intellectual", + "replies" : " 5", + "views" : " 29", + "queryText" : "Part Number: UC3525A Hi team, Could you kindly advise the below inquires form customer ? 1. Why the charge time at CT 0.1uF in Fig 1 is longer than at CT 0.02uF ? It seems the number of CT get be smaller and smaller and charge time get be longer as well. 2. What is charge time ? - What should customer consider from Fig 1 ? - It looks different that charge time is switching frequency since switching frequency is provided by equation f = 1/CT(0.7RT + 3RD) Is the time until full charge of CT ? 3. Regarding fig 2 What can customer find from Fig 2 ? When customer configured RD = 100 ohm, how long will dead time take ? 4. Could you kindly provide the behavior if sync is used ? Customer would like to know the relation between internal clock and external clock. Thank you and best regards, Michiaki", + "partNumber" : " UC3525A", + "allResponseList" : [ { + "contentId" : "3322411", + "userName" : "Teng Feng", + "rankPoints" : "9390", + "rankName" : "Genius", + "date" : "Apr 21, 2020 6:53 AM", + "userId" : "5617595", + "content" : "Hi Machiaki, 1./ It should be a writing mistake in figure 1, it is 0.1uf rather than 0.01uf. With the same RT, the larger CT, the longer charger time. 2./ Figure 1 is the charge time, not switching period, the switching period should be the sum of charging time and discharging time. The equation f = 1/CT(0.7RT + 3RD) can be used to approximately calculated the frequency. 3./ According figure 2, if CT is defined, then we can configure RD to get the desired dead time (discharging time). 4./ If synchronization is used, the sync signal will force to arrive the internal discharging threshold earlier. The PWM is allowed to run at the frequency set by RT, CT and RD until the sync pulse appears. Generally, the free frequency must be set to a lower frequency than the sync pulse, typically 15%. Regards, Teng" + }, { + "contentId" : "3323657", + "userName" : "Michiaki Tanii", + "rankPoints" : "1600", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 2:05 AM", + "userId" : "6119109", + "content" : "Hi Teng, Could you kindly advise how we can see the figure 1? Thank you and best regards, Michiaki" + }, { + "contentId" : "3323863", + "userName" : "Teng Feng", + "rankPoints" : "9390", + "rankName" : "Genius", + "date" : "Apr 22, 2020 6:31 AM", + "userId" : "5617595", + "content" : "Hi Michiaki, The device uses an external resistor to set the charging current for the external capacitor, which determines the oscillator frequency.company recommends timing resistor values from 2 kΩ to 150 kΩ and timing capacitor values from 0.001 uF to 0.01 uF. See Figure 1 for component values for setting the charging time (oscillator frequency). And see Figure 2 for dead time resister value for setting the discharging time (dead time), and dead time resister value from 0 to 500 Ω. Because resistors are available in more precise increments, typically 1%, and capacitors are only available in 5% accuracy, it might be more practical to select the closest capacitor value first and then select the timing resistor value next according the figure 1 and figure 2. Regards, Teng" + }, { + "contentId" : "3323980", + "userName" : "Michiaki Tanii", + "rankPoints" : "1600", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 8:33 AM", + "userId" : "6119109", + "content" : "Hi Teng, Could you kindly advise why the charge time is longer as CT is smaller ? Thank you and best regards, Michiaki" + }, { + "contentId" : "3324006", + "userName" : "Teng Feng", + "rankPoints" : "9390", + "rankName" : "Genius", + "date" : "Apr 22, 2020 9:02 AM", + "userId" : "5617595", + "content" : "Hi Michiaki, The charging time should be the larger, as the CT increases. There is a mistake in figure 1, please exchange the position of 0.01 uF and 0.1 uF. Regards, Teng" + } ], + "tags" : [ "/support/power-management/f/196/tags/UC3525A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898317.json b/data/json/DLP/898317.json new file mode 100644 index 0000000000000000000000000000000000000000..63d3f77aec1122a1d9ee95c0a22adf3ee7c57f9f --- /dev/null +++ b/data/json/DLP/898317.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "898317", + "reporterName" : "Hector Ta", + "rankPoints" : "670", + "resolutionStatus" : "Resolved", + "ticketName" : "IWR6843: Modify GUI sample code to adapt with UART crash", + "rankName" : "Intellectual", + "replies" : " 11", + "views" : " 60", + "queryText" : "Part Number: IWR6843 Sometimes when the IWR6843 sends data to PC via UART, it got crashed and GUI stops working. With the current GUI version, we must reset both GUI and IWR6843. But my customers may think that device has problem. I want to modify the GUI code to make it work normally without having to reset device, so my customers will believe that problem comes from UART, not from device. We only need to re-open GUI and enter COM port, then data continue transfer. Please tell me which part in python code of GUI can be modified to meet this requirement.", + "partNumber" : " IWR6843", + "allResponseList" : [ { + "contentId" : "3321537", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 3:58 PM", + "userId" : "5118664", + "content" : "Hi Hector, Please see the file gui_main.py. When the send cfg button is pressed, you will see that it does two things: Tells the parser object to send the configuration Starts a timer with duration frame period, which calls the parse function periodically. For your application needs, you will need to add a button that does #2 above. See the sendCfg() function in gui_main.py - essentially you have to have a button activated function that calls the following line: self.parseTimer.start(self.frameTime) self.frameTime is set when the configuration is loaded into the gui, you may need to set it to 50 as default (this is 50 ms). If you are getting an error message when the GUI crashes, can you send a picture? Regards, Justin" + }, { + "contentId" : "3322558", + "userName" : "Hector Ta", + "rankPoints" : "670", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 9:21 AM", + "userId" : "6292133", + "content" : "Hi Justin, GUI only stopped frame numbers and target tracking when it crashed. I don't have any error message. I'll think of the way you mentioned and ask you more later." + }, { + "contentId" : "3325483", + "userName" : "Hector Ta", + "rankPoints" : "670", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 10:27 AM", + "userId" : "6292133", + "content" : "Hi Justin, I'm not sure what you mean. sendCfg() is made a button in setConfigLayout() as self.sendConfig.clicked.connect(self.sendCfg). Why do I need to make another button? Do you mean by setting self.frameTime = 50, even if GUI crashes, I don't need to reset device, only re-open GUI and can keep getting data? Just simple like that? Please enlighten me if my understanding is wrong." + }, { + "contentId" : "3325852", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 3:34 PM", + "userId" : "5118664", + "content" : "Hi Hector, Your initial problem is that the gui is crashing, but the device is not - correct? So if GUI crashes, you have to restart the gui. Currently, there is no option to start parsing the UART with sending a config to the device (which will usually crash the device, behavior is undefined). So my suggestion is to add an option in the gui to restart the UART parsing without sending a configuration. Regards, Justin" + }, { + "contentId" : "3325954", + "userName" : "Hector Ta", + "rankPoints" : "670", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 4:22 PM", + "userId" : "6292133", + "content" : "Hi Justin, So the reason why I had to reset device even though it's still ok because current GUI version only can parse data after sending Cfg? If we skip it, there's no need to reset device anymore, right? But I think self.parseTimer.start() as you mentioned is only to set timing to parse data after we sent Cfg, not to skip sending Cfg after re-open GUI. Is there any other function in python code I need to notice?" + }, { + "contentId" : "3326174", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 7:42 PM", + "userId" : "5118664", + "content" : "Hi Hector, When the timer ticks to 0, it automatically calls the parse thread, and the rest of the gui will do what its supposed to after that. So really the only function to worry about is starting the timer. Regards, Justin" + }, { + "contentId" : "3326742", + "userName" : "Hector Ta", + "rankPoints" : "670", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 7:09 AM", + "userId" : "6292133", + "content" : "Hi Justin, 1. I made GUI work normally without resetting device after GUI crashes. But the fact is, the 1st time I power on the device and send Cfg, I see a boundary box simulating the space we want limit for tracking (room's size, I think). my new GUI can re-open and work well, but I don't see boundary box anymore. Please tell me which part to modify for boundary display after re-open GUI. I think it's in parseCfg(), please tell me more details for it. 2. I attach my video here. You can see there's no boundary after re-open GUI. Besides, another problem is: If I rebuild 3D people count in toolbox and flash program again, the device didn't work. Then, I modified toolbox code a little, now it can work but you can see in the video the tracking box flickering (target number switch between 0 & 1 continuously). This problem doesn't happen if I flash prebuilt bin file from TI, only happen when I rebuild toolbox code. Please see video below and tell me solution for GUI optimization and tracking box flickering problem. https://youtu.be/cn2H3XIp7dI" + }, { + "contentId" : "3326743", + "userName" : "Hector Ta", + "rankPoints" : "670", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 7:09 AM", + "userId" : "6292133", + "content" : "Hi Justin, 1. I made GUI work normally without resetting device after GUI crashes. But the fact is, the 1st time I power on the device and send Cfg, I see a boundary box simulating the space we want limit for tracking (room's size, I think). my new GUI can re-open and work well, but I don't see boundary box anymore. Please tell me which part to modify for boundary display after re-open GUI. I think it's in parseCfg(), please tell me more details for it. 2. I attach my video here. You can see there's no boundary after re-open GUI. Besides, another problem is: If I rebuild 3D people count in toolbox and flash program again, the device didn't work. Then, I modified toolbox code a little, now it can work but you can see in the video the tracking box flickering (target number switch between 0 & 1 continuously). This problem doesn't happen if I flash prebuilt bin file from TI, only happen when I rebuild toolbox code. Weirdly, my manager used the same toolbox version and rebuilt code, ha can do tracking normally. But my PC can't track target, only see point cloud. He said maybe CCS , SDK or other software on my PC are not suitable. I installed all the same as his PC but still has weird status. Previously, I could track normally. But after I flashed another program of HVAC, I couldn't track 3D people count correctly as before. Please see video below and tell me solution for GUI optimization and tracking box flickering problem. Here're 2 versions of my code that does not track normally File 1. Tracking box flickering (file name 3D_4.2) 3D_4.2 toolbox.zip File 2. Tracking ok on my manager PC but only see point cloud without tracking box on my PC (file name 3D_4.2.1) 3D_4.2.1.zip Please tell me if I need to modify any environment settings on PC to get tracking normally as before." + }, { + "contentId" : "3327231", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 3:49 PM", + "userId" : "5118664", + "content" : "Hi Hector, For the issue of the boundary box not appearing, when you reopen the gui, just check the boundary box option \"Enable Box\" and make sure the right values are set in the menu. These are automatically set when the config is loaded, so if you are reloading the config you have to set it yourself. For the issue of the tracks disappearing - the gui is fairly dumb, it only shows exactly what the device tells it. With this is mind, it is possible that your PC is missing the occasional frame of data - since the gui doesn't get the frame info, it may not draw the track, leading to a flicker. However, it is also possible that somehow the wrong tracker got linked. Do you know how to check the linker settings in CCS? Please ensure that the gtrack library from the 3D People Counting lab is being linked in the linker settings. Regards, Justin" + }, { + "contentId" : "3329069", + "userName" : "Hector Ta", + "rankPoints" : "670", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 3:54 PM", + "userId" : "6292133", + "content" : "Hi Justin, I checked linker library pathin CCS. It linked to toolbox->lab->3D count. It should be correct. But it can't get normal tracking as before. About Enable Box, is there any way to make box automatically enabled without having to click on that check-box?" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR6843", "/support/sensors/f/1023/tags/_2300_GUI" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898319.json b/data/json/DLP/898319.json new file mode 100644 index 0000000000000000000000000000000000000000..0f0a0836ea5c1cfe36d7b7c2d1929af05187a5a4 --- /dev/null +++ b/data/json/DLP/898319.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898319", + "reporterName" : "Taoran Jiang", + "rankPoints" : "730", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ27220: Flags()[ITPOR] missing", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 19", + "queryText" : "Part Number: BQ27220 Hi team, My customer now uses BQ27220 and they want to use Flags()[ITPOR] bit to flag if RAM configuration is reset to default configuration. But we can't find the address of this bit in Batterystatus(). So please help me find out where and how to read this bit? Thank you! Gary", + "partNumber" : " BQ27220", + "allResponseList" : [ { + "contentId" : "3321653", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 4:57 PM", + "userId" : "1864278", + "content" : "As far as I know, that bit doesn't exist. See the following thread. /support/power-management/f/196/p/765496/2839734?tisearch=e2e-sitesearch&keymatch=bq27220%2520ITPOR#2839734 Andy" + }, { + "contentId" : "3322175", + "userName" : "Taoran Jiang", + "rankPoints" : "730", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 1:56 AM", + "userId" : "6107027", + "content" : "Hi Andy, If so, my customer now wants to know when the RAM is reset to default configuration as soon as possible(ITPOR function). Can you recommend some good solution on BQ27220? Many thanks! Gary" + }, { + "contentId" : "3324988", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 11:34 PM", + "userId" : "1864278", + "content" : "Hi Gary, I have not seen a bit that can serve that purpose yet. How does the customer program their configurations to the gauge device? Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ27220" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898343.json b/data/json/DLP/898343.json new file mode 100644 index 0000000000000000000000000000000000000000..78c7f571c9ab9041c420a0e4a03042d598d61cbf --- /dev/null +++ b/data/json/DLP/898343.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "898343", + "reporterName" : "Jimmy Lai", + "rankPoints" : "30", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS54821: Value of OVP", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 28", + "queryText" : "Part Number: TPS54821 Hi Team Our customer want to know the value of OVP I can't find the value of OVP on the datasheet. The spec of circuit as follow Vin = 12V Vout = 3.3V Iout = 4.83A What is the value of OVP, I would like to suggest to the guests. Please explain how to know the value of OVP or Can I have information for reference? Thank you!", + "partNumber" : " TPS54821", + "allResponseList" : [ { + "contentId" : "3321351", + "userName" : "Yuchang Zhang", + "rankPoints" : "8080", + "rankName" : "Expert", + "date" : "Apr 20, 2020 2:31 PM", + "userId" : "4780235", + "content" : "Hi, we will check and give you feedback these two days. Yuchang" + }, { + "contentId" : "3323771", + "userName" : "Yuchang Zhang", + "rankPoints" : "8080", + "rankName" : "Expert", + "date" : "Apr 22, 2020 4:35 AM", + "userId" : "4780235", + "content" : "Jimmy, Typically it is 106%*Vref. Yuchang" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS54821" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898344.json b/data/json/DLP/898344.json new file mode 100644 index 0000000000000000000000000000000000000000..19cfb61fc824c08ac7f8a9cec75bfdc6d453925e --- /dev/null +++ b/data/json/DLP/898344.json @@ -0,0 +1,71 @@ +{ + "ticketNumber" : "898344", + "reporterName" : "Ernie", + "rankPoints" : "120", + "resolutionStatus" : "Resolved", + "ticketName" : "CCS/IWR6843ISK-ODS: mmwave studio LUA shell RSTD.NetStart issue", + "rankName" : "Prodigy", + "replies" : " 7", + "views" : " 42", + "queryText" : "Part Number: IWR6843ISK-ODS Tool/software: Code Composer Studio Hi When I try to use RSTD.NetStart instruction in LUA shell. It returns a message as following: I also modify the mmWaveStudio.exe.config line 5 from name=\"RTTT.Properties.Settings to name=\"RSTD.Properties.Settings, but the error still exists. How should I do for this issue? Ernie", + "partNumber" : " IWR6843ISK-ODS", + "allResponseList" : [ { + "contentId" : "3321617", + "userName" : "AmandaN", + "rankPoints" : "11910", + "rankName" : "Genius", + "date" : "Apr 20, 2020 4:38 PM", + "userId" : "5084791", + "content" : "Hello, Can you please try the latest version of Studio 2.1? I have tested it and RSTD.NetStart() is called in the Startup script automatically. You do not need to enter it in the LUA shell. In the output window you can see: RstdNet: Port 2777: Listening.. as the response after launch mmWave Studio. Amanda" + }, { + "contentId" : "3321627", + "userName" : "Ernie", + "rankPoints" : "120", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 4:43 PM", + "userId" : "6250631", + "content" : "Hi But the version of Radar board is ES1.0. The Studio 1.0 seems that only support ES2.0? Ernie" + }, { + "contentId" : "3321671", + "userName" : "AmandaN", + "rankPoints" : "11910", + "rankName" : "Genius", + "date" : "Apr 20, 2020 5:08 PM", + "userId" : "5084791", + "content" : "Ernie, I was able to use v 2.0 with modification to the .config file. As specified in this thread: /.../2627526 I've attached the file I used.6747.mmWaveStudio.exe.config Can you replace it and see if it works for you. You should see the RstdNet: Port 2777: Listening.. response in the output panel after giving the command in the Lua Shell. Please provide the message shown in the output panel if you are still not able to get it to work. AManda" + }, { + "contentId" : "3322225", + "userName" : "Ernie", + "rankPoints" : "120", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 2:54 AM", + "userId" : "6250631", + "content" : "Hi Amanda I have replaced the mmWaveStudio configure file on my PC. However, the mmWave Studio can't be used after replacing the configure file. The attachment is my configure file. The difference between our configure is from line 71. 0121.mmWaveStudio.exe.config Ernie" + }, { + "contentId" : "3322702", + "userName" : "AmandaN", + "rankPoints" : "11910", + "rankName" : "Genius", + "date" : "Apr 21, 2020 12:23 PM", + "userId" : "5084791", + "content" : "Hello Ernie, Can you try uninstall and then reinstall mmWave Studio and then replacing the file or making the changes as I have in my attached file? Make sure you manually delete the RSTD folder as a whole present in the C:\\Users\\\\AppData\\Roaming location before you reinstall. Amanda" + }, { + "contentId" : "3326746", + "userName" : "Ernie", + "rankPoints" : "120", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 7:11 AM", + "userId" : "6250631", + "content" : "Hi I try to uninstall and then reinstall mmWave Studio and then replacing the file or making the changes as you mention above, and I also try the issue as follows: /support/sensors/f/1023/t/671275?tisearch=e2e-quicksearch&keymatch=awr1243boost:%20Radar%20studio%20automation But the error still exists, the return is the same as >RSTD.NetStart ans=Lua511.LuaCSFunction Does it mean the function has a problem? or the port 2777 has been used so I can't use it? Ernie" + }, { + "contentId" : "3327257", + "userName" : "AmandaN", + "rankPoints" : "11910", + "rankName" : "Genius", + "date" : "Apr 24, 2020 3:58 PM", + "userId" : "5084791", + "content" : "You need to be invoking it as a function RSTD.NetStart(); you're using only RSTD.NetStart" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR6843%2bMMWaveStudio%2bRSTD-NetStart", "/support/sensors/f/1023/tags/code%2bComposer%2bstudio", "/support/sensors/f/1023/tags/IWR6843ISK_2D00_ODS" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898351.json b/data/json/DLP/898351.json new file mode 100644 index 0000000000000000000000000000000000000000..501d88ac718b792afdf6cf2a8fd30b768573de05 --- /dev/null +++ b/data/json/DLP/898351.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "898351", + "reporterName" : "M.A.M", + "rankPoints" : "7280", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS61178: Spike on SW node", + "rankName" : "Expert", + "replies" : " 2", + "views" : " 18", + "queryText" : "Part Number: TPS61178 Hi, My customer see very short (~10ns) spikes exceeding Abs max on the SW pin with about 3V. I would like to share and discuss their material offline. Please reach out to me via email. Thanks. B.r M.A.M", + "partNumber" : " TPS61178", + "allResponseList" : [ { + "contentId" : "3322185", + "userName" : "Minqiu Xie", + "rankPoints" : "12515", + "rankName" : "Genius", + "date" : "Apr 21, 2020 2:06 AM", + "userId" : "5303427", + "content" : "Hi M.A.M Sorry that I can't find the email informantion. Could you send to me? Thank you!" + }, { + "contentId" : "3322420", + "userName" : "M.A.M", + "rankPoints" : "7280", + "rankName" : "Expert", + "date" : "Apr 21, 2020 7:06 AM", + "userId" : "5909", + "content" : "Thanks. I will contact you. B.r M.A.M" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS61178" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898364.json b/data/json/DLP/898364.json new file mode 100644 index 0000000000000000000000000000000000000000..79d3d516ca66ba417f35be3e569e6b6ec0e42179 --- /dev/null +++ b/data/json/DLP/898364.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "898364", + "reporterName" : "Michiaki Tanii", + "rankPoints" : "1600", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UC3825: Switching frequency", + "rankName" : "Intellectual", + "replies" : " 5", + "views" : " 34", + "queryText" : "Part Number: UC3825 Hi team, Could you provide the equation for frequency configuration with RT, CT ? And are there any application report to know more detail to design circuit with UC3825 ? Thank you and best regards, Michiaki", + "partNumber" : " UC3825", + "allResponseList" : [ { + "contentId" : "3322449", + "userName" : "Teng Feng", + "rankPoints" : "9390", + "rankName" : "Genius", + "date" : "Apr 21, 2020 7:26 AM", + "userId" : "5617595", + "content" : "Hi Michiaki, I didn't find a equation for the frequency of UC3825, you can design the frequency according the figure of \"Timing Resistance vs Frequency \" in page 6 of datasheet. It is more accurate than the equation. I only found one UC3825 application note for your reference, /lit/an/slua053/slua053.pdf but I think it is more like a power note. If you want to verify the calculation and design, it is a good solution to use a simulation module which is available online. /product/UC3825/toolssoftware Regards, Teng" + }, { + "contentId" : "3323669", + "userName" : "Michiaki Tanii", + "rankPoints" : "1600", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 2:20 AM", + "userId" : "6119109", + "content" : "Hi Teng, Does customer need cut and try on TINA and design without equation ? Thank you and best regards, Michiaki" + }, { + "contentId" : "3323871", + "userName" : "Teng Feng", + "rankPoints" : "9390", + "rankName" : "Genius", + "date" : "Apr 22, 2020 6:40 AM", + "userId" : "5617595", + "content" : "Hi Michiaki, Yes, customer can select the RT and CT according the figure of \"Timing Resistance vs Frequency \" in page 6 of datasheet. And I recommend to use a simulation to rectify the result if they want. Regards, Teng" + }, { + "contentId" : "3324470", + "userName" : "Michiaki Tanii", + "rankPoints" : "1600", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 3:07 PM", + "userId" : "6119109", + "content" : "Hi Teng, Could you kindly advise what difference is between UC3825 and UC3825A/B ? We can find the more detail in the datasheet of UC3825A/B. Should we recommend UC3825A/B instead of UC3825? Thank you and best regards, Michiaki" + }, { + "contentId" : "3325153", + "userName" : "Teng Feng", + "rankPoints" : "9390", + "rankName" : "Genius", + "date" : "Apr 23, 2020 2:50 AM", + "userId" : "5617595", + "content" : "Hi Michiaki, In most applications, the UC3825A/B devices are enhanced drop-in replacements for UC3825a/B high speed PWMs. We can recommend UC3825A/B to customer instead of UC3825. The differences can be easily found in the attached document. And also datasheet. /lit/an/slua125/slua125.pdf Regards, Teng" + } ], + "tags" : [ "/support/power-management/f/196/tags/UC3825" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898379.json b/data/json/DLP/898379.json new file mode 100644 index 0000000000000000000000000000000000000000..f15ac239af8e3593315b374c0fcdbc544f6549b9 --- /dev/null +++ b/data/json/DLP/898379.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898379", + "reporterName" : "Lee Jeff", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS55330: TPS55330 work abnormal, does not match the formula", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 16", + "queryText" : "Part Number: TPS55330 Hi I got a problem Calculate according to the formula Input 12V, require output 16V, circuit as picture But the output is 19V, no matter if R175 is 120K or 100K Where is the problem? Thank you 1.229V x (R175/R177 +1)", + "partNumber" : " TPS55330", + "allResponseList" : [ { + "contentId" : "3321062", + "userName" : "Zack Liu", + "rankPoints" : "12495", + "rankName" : "Genius", + "date" : "Apr 20, 2020 11:16 AM", + "userId" : "4961181", + "content" : "Hi Jeff, Can you share the layout? Have you tried applying a load at output? Will the output voltage sitill be 19V?" + }, { + "contentId" : "3322342", + "userName" : "Lee Jeff", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 5:55 AM", + "userId" : "6328260", + "content" : "In fact, I made a mistake. My original design is wrong. So change to external parts for experiment. Layout as picture. Thanks" + }, { + "contentId" : "3322363", + "userName" : "Zack Liu", + "rankPoints" : "12495", + "rankName" : "Genius", + "date" : "Apr 21, 2020 6:08 AM", + "userId" : "4961181", + "content" : "Hi Jeff, I didn't find the detailed datasheet for inductor MSPI0530-1R0M, please make sure the inductor has enough saturation current spec. The shared layout picture doesn't show me the position of output capacitors. Please make a note on above picture. Below is the recommended layout in datasheet. The output capacitors are suggested to put close to cathode of Schottky diode and IC PGND pins so that the PCB parasitic inductance is the minimum. Meanwhile, the power traces should be wide enough. Lastly, check the FB pin voltage to AGND with a DMM. It should be 1.244V." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS55330" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898382.json b/data/json/DLP/898382.json new file mode 100644 index 0000000000000000000000000000000000000000..308f164bfb2ba6186eb82d79adfbff14ba9776f3 --- /dev/null +++ b/data/json/DLP/898382.json @@ -0,0 +1,87 @@ +{ + "ticketNumber" : "898382", + "reporterName" : "Hector Ta", + "rankPoints" : "670", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "CCS/IWR6843: SPI test compile error", + "rankName" : "Intellectual", + "replies" : " 9", + "views" : " 86", + "queryText" : "Part Number: IWR6843 Tool/software: Code Composer Studio I'm trying to test SPI function on IWR6843. After finished pinmux settings, I modified the mss_main.c code of 3D people counting and added the SPI test code based on sample code in the path: C:\\ti\\mmwave_sdk_03_03_00_03\\packages\\ti\\drivers\\spi\\test\\xwr68xx I already done SPI_init(), SPI_Params_init(¶ms); But there were many errors occurred. Please explain (something like 3D_people_count_68xx_mss.xe4f not built, other errors and help me solve it. Here's the code I used void Test_spiSlaveWithPC(void)\n{\n SPI_Params params;\n SPI_Handle handle;\n spiTestMsg* pTestMsg;\n uint16_t retry=0;\n uint16_t msgSeqNo = 0;\n uint32_t loop;\n volatile uint32_t cycles;\n float throughput;\n uint32_t totalLoop;\n\n /* Setup the default SPI Parameters */\n SPI_Params_init(¶ms);\n\n params.mode = SPI_SLAVE;\n params.frameFormat = SPI_POL0_PHA1;\n params.pinMode = SPI_PINMODE_4PIN_CS;\n params.shiftFormat = SPI_MSB_FIRST;\n\n /* When communicating with PC through FTDI, it is difficult to toggle CS for every two bytes, hence set csHold to 1.\n In this mode, the highest working SPI clock is 2MHz */\n params.csHold = 1;\n\n /* Enable DMA and set DMA channels */\n params.dmaEnable = 1;\n params.dmaHandle = gDmaHandle;\n params.u.slaveParams.dmaCfg.txDmaChanNum =1U;\n params.u.slaveParams.dmaCfg.rxDmaChanNum =0U;\n\n handle = SPI_open(0, ¶ms);\n if (handle == NULL)\n {\n System_printf(\"Error: Unable to open the SPI Instance\\n\");\n MCPI_setFeatureTestResult (\"SPI Slave with PC \", MCPI_TestResult_FAIL);\n return;\n }\n\n memset((void *)txBuf, 0x55, SPI_TEST_MSGLEN);\n\n System_printf(\"Debug: SPI Instance %p has been reopened in SLAVE mode successfully for 4pin FTDI testing\\n\", handle);\n gXWR1xxxSlaveReady = true;\n\n while(1)\n {\n Test_spiRead(handle, SPI_TEST_MSGLEN, (void *)rxBuf, 0U);\n\n pTestMsg = (spiTestMsg*)&rxBuf[0];\n if(pTestMsg->magicNumber != SWAP_BYTES(MAGIC_NUMBER))\n {\n System_printf(\"incorrect magic Number: 0x%x 0x%x\\n\", pTestMsg->magicNumber, SWAP_BYTES(MAGIC_NUMBER));\n continue;\n }\n\n if((pTestMsg->dataLen != SWAP_BYTES(SPI_TEST_SYNC_MSGLEN)) || (pTestMsg->seqNo != 0))\n {\n System_printf(\"incorrect datalen(%d), seqNo= %d\\n\", pTestMsg->dataLen, pTestMsg->seqNo);\n continue;\n }\n\n /* Got the correct sync message, send back the message */\n msgSeqNo = SWAP_BYTES(pTestMsg->seqNo);\n pTestMsg->seqNo = SWAP_BYTES(msgSeqNo+1);\n\n /* Read two byte , send it back */\n Test_spiWrite(handle, SPI_TEST_MSGLEN, (void *)pTestMsg, 0U);\n\n break;\n }\n\n /* Save the Sync message for re-sent */\n memcpy((void *)txBuf, (void *)pTestMsg, SPI_TEST_MSGLEN);\n\n /* Got the Sync message, waiting for next test message */\n msgSeqNo += 2;\n\n /* Test loop count from first 16 bits of Sync message */\n loop = pTestMsg->data[0] * 256 + pTestMsg->data[1] ;\n System_printf(\"Test loop=%d, bufferLen=%d\\n\", loop, SPI_TEST_MSGLEN);\n totalLoop = loop;\n\n while(loop)\n {\n /* Read two byte , send it back */\n Test_spiRead(handle, SPI_TEST_MSGLEN, (void *)rxBuf, 0U);\n\n if(pTestMsg->magicNumber != SWAP_BYTES(MAGIC_NUMBER))\n {\n continue;\n }\n\n if((pTestMsg->seqNo == 0) && (pTestMsg->dataLen == SWAP_BYTES(SPI_TEST_SYNC_MSGLEN)))\n {\n /* Re-sent the Sync message */\n Test_spiWrite(handle, SPI_TEST_MSGLEN, (void *)txBuf, 0U);\n continue;\n }\n\n /* Receive Last message */\n if(pTestMsg->seqNo == SWAP_BYTES(msgSeqNo - 2))\n {\n Test_spiWrite(handle, SPI_TEST_MSGLEN, (void *)txBuf, 0U);\n retry++;\n\n continue;\n }\n\n /* Incorrect seqNo, drop the message */\n if(pTestMsg->seqNo != SWAP_BYTES(msgSeqNo))\n {\n retry++;\n continue;\n }\n\n if(loop == totalLoop)\n {\n // Start the counter after receive the first message\n Test_benchmarkStart(0);\n }\n\n retry = 0;\n loop--;\n\n /* Receive the message with correct header, increment the seq Number */\n pTestMsg->seqNo = SWAP_BYTES(SWAP_BYTES(pTestMsg->seqNo) + 1);\n\n Test_spiWrite(handle, SPI_TEST_MSGLEN, (void *)pTestMsg, 0U);\n\n msgSeqNo += 2;\n }\n // Stop the counter\n cycles = Test_benchmarkStop(0);\n\n // Calculate and print the count\n throughput = 8.0 * SPI_TEST_MSGLEN * totalLoop * VBUSP_FREQ / cycles;\n System_printf(\"Debug: throughput overall = %.2f Mbps\\n\", throughput);\n\n MCPI_setFeatureTestResult (\"SPI Slave with PC \", MCPI_TestResult_PASS);\n}\n\n/**\n * @b Description\n * @n\n * System Initialization Task which initializes the various\n * components in the system.\n *\n * @retval\n * Not Applicable.\n */\nstatic void Pcount3DDemo_initTask(UArg arg0, UArg arg1)\n{\n int32_t errCode;\n MMWave_InitCfg initCfg;\n UART_Params uartParams;\n Task_Params taskParams;\n Semaphore_Params semParams;\n DPM_InitCfg dpmInitCfg;\n DMA_Params dmaParams;\n DMA_Handle dmaHandle;\n\tSPI_Params \t\tparams;\n SPI_Handle \t\thandle;\n\tSOC_Handle \tsocHandle;\n spiTestMsg* \t\tpTestMsg;\n\tint32_t \tretVal = 0;\n\t\n\t/* Get SOC driver Handle */\n socHandle = (SOC_Handle) arg0;\n\n DPC_ObjectDetectionRangeHWA_InitParams objDetInitParams;\n// int32_t i;\n\n /* Debug Message: */\n System_printf(\"Debug: Launched the Initialization Task\\n\");\n\t\n\t/* Initialize MCPI logger framework */\n MCPI_Initialize ();\n\n /*****************************************************************************\n * Initialize the mmWave SDK components:\n *****************************************************************************/\n /* Initialize the UART */\n UART_init();\n\n /* Initialize the DMA for UART */\n DMA_init ();\n\t\n\t/* Open DMA driver instance 0 for SPI test */\n gDmaHandle = DMA_open(0, &dmaParams, &retVal);\n\n if(gDmaHandle == NULL)\n {\n printf(\"Open DMA driver failed with error=%d\\n\", retVal);\n return;\n }\n\t\n\t/* Initialize the SPI */\n SPI_init();\n\t/* Setup the default SPI Parameters */\n SPI_Params_init(¶ms);\n\t\n\t/**************************************************************************\n * Test: One instace API test - SPIA\n **************************************************************************/\n Test_spiAPI_oneInstance(0);\n System_printf(\"Debug: Finished API Test for SPIA!\\n\");\n\n /**************************************************************************\n * Test: One instace API test - SPIB\n **************************************************************************/\n Test_spiAPI_oneInstance(1);\n System_printf(\"Debug: Finished API Test for SPIB!\\n\");\n\n /**************************************************************************\n * Test: two instaces API test - SPIA & SPIB\n **************************************************************************/\n Test_spiAPI_twoInstance();\n System_printf(\"Debug: Finished API Test for SPIA + SPIB!\\n\");\n\t\n\tif(gXWR1xxxSlaveWithFTDITest)\n {\n /* Enable output control for SPIA in 4Pin mode */\n if(SOC_SPIOutputCtrl(socHandle, 0U, 0U, &errCode) < 0)\n {\n /* Debug Message: */\n System_printf (\"Debug: SOC_SPIOutputCtrl failed with Error [%d]\\n\", errCode);\n return;\n }\n\n Test_spiSlaveWithPC();\n }\n\n /* Open the DMA Instance */\n DMA_Params_init(&dmaParams);\n dmaHandle = DMA_open(0, &dmaParams, &errCode);\n if (dmaHandle == NULL)\n {\n printf (\"Error: Unable to open the DMA Instance [Error code %d]\\n\", errCode);\n return;\n }\n\n /* Initialize the GPIO */\n GPIO_init();\n\n /* Initialize the Mailbox */\n Mailbox_init(MAILBOX_TYPE_MSS);\n\n /* Platform specific configuration */\n Pcount3DDemo_platformInit(&gMmwMssMCB.cfg.platformCfg);\n\n /*****************************************************************************\n * Open the mmWave SDK components:\n *****************************************************************************/\n /* Setup the default UART Parameters */\n UART_Params_init(&uartParams);\n uartParams.clockFrequency = gMmwMssMCB.cfg.platformCfg.sysClockFrequency;\n uartParams.baudRate = gMmwMssMCB.cfg.platformCfg.commandBaudRate;\n uartParams.isPinMuxDone = 1;\n\n /* Open the UART Instance */\n gMmwMssMCB.commandUartHandle = UART_open(0, &uartParams);\n if (gMmwMssMCB.commandUartHandle == NULL)\n {\n Pcount3DDemo_debugAssert (0);\n return;\n }\n\n /* Setup the default UART Parameters */\n UART_Params_init(&uartParams);\n uartParams.writeDataMode = UART_DATA_BINARY;\n uartParams.readDataMode = UART_DATA_BINARY;\n uartParams.clockFrequency = gMmwMssMCB.cfg.platformCfg.sysClockFrequency;\n uartParams.baudRate = gMmwMssMCB.cfg.platformCfg.loggingBaudRate;\n uartParams.isPinMuxDone = 1U;\n\n uartParams.dmaHandle = dmaHandle;\n uartParams.txDMAChannel = UART_DMA_TX_CHANNEL; \n uartParams.rxDMAChannel = UART_DMA_RX_CHANNEL; \n\n /* Open the Logging UART Instance: */\n gMmwMssMCB.loggingUartHandle = UART_open(1, &uartParams);\n if (gMmwMssMCB.loggingUartHandle == NULL)\n {\n System_printf(\"Error: Unable to open the Logging UART Instance\\n\");\n Pcount3DDemo_debugAssert (0);\n return;\n }\n\n /* Create binary semaphores which is used to signal DPM_start/DPM_stop/DPM_ioctl is done\n * to the sensor management task. The signalling (Semaphore_post) will be done\n * from DPM registered report function (which will execute in the DPM execute task context). */\n Semaphore_Params_init(&semParams);\n semParams.mode = Semaphore_Mode_BINARY;\n gMmwMssMCB.DPMstartSemHandle = Semaphore_create(0, &semParams, NULL);\n gMmwMssMCB.DPMstopSemHandle = Semaphore_create(0, &semParams, NULL);\n gMmwMssMCB.DPMioctlSemHandle = Semaphore_create(0, &semParams, NULL);\n\n /* Open EDMA driver */\n Pcount3DDemo_edmaInit(&gMmwMssMCB.dataPathObj, DPC_OBJDET_R4F_EDMA_INSTANCE);\n\n /* Use EDMA instance 0 on MSS */\n Pcount3DDemo_edmaOpen(&gMmwMssMCB.dataPathObj, DPC_OBJDET_R4F_EDMA_INSTANCE);\n\n Pcount3DDemo_hwaInit(&gMmwMssMCB.dataPathObj);\n Pcount3DDemo_hwaOpen(&gMmwMssMCB.dataPathObj, gMmwMssMCB.socHandle);\n\n /*****************************************************************************\n * mmWave: Initialization of the high level module\n *****************************************************************************/\n\n /* Initialize the mmWave control init configuration */\n memset ((void*)&initCfg, 0 , sizeof(MMWave_InitCfg));\n\n /* Populate the init configuration: */\n initCfg.domain = MMWave_Domain_MSS;\n initCfg.socHandle = gMmwMssMCB.socHandle;\n initCfg.eventFxn = Pcount3DDemo_eventCallbackFxn;\n initCfg.linkCRCCfg.useCRCDriver = 1U;\n initCfg.linkCRCCfg.crcChannel = CRC_Channel_CH1;\n initCfg.cfgMode = MMWave_ConfigurationMode_FULL;\n initCfg.executionMode = MMWave_ExecutionMode_ISOLATION;\n\n /* Initialize and setup the mmWave Control module */\n gMmwMssMCB.ctrlHandle = MMWave_init (&initCfg, &errCode);\n if (gMmwMssMCB.ctrlHandle == NULL)\n {\n /* Error: Unable to initialize the mmWave control module */\n System_printf (\"Error: mmWave Control Initialization failed [Error code %d]\\n\", errCode);\n Pcount3DDemo_debugAssert (0);\n return;\n }\n System_printf (\"Debug: mmWave Control Initialization was successful\\n\");\n\n /* Synchronization: This will synchronize the execution of the control module\n * between the domains. This is a prerequiste and always needs to be invoked. */\n if (MMWave_sync (gMmwMssMCB.ctrlHandle, &errCode) < 0)\n {\n /* Error: Unable to synchronize the mmWave control module */\n System_printf (\"Error: mmWave Control Synchronization failed [Error code %d]\\n\", errCode);\n Pcount3DDemo_debugAssert (0);\n return;\n }\n System_printf (\"Debug: mmWave Control Synchronization was successful\\n\");\n\t\n\t// Create a task to do SPI \n/*\tTask_Params_init(&taskParams);\n taskParams.stackSize = 6*1024;\n taskParams.arg0 = (UArg)socHandle;\n Task_create(Test_initTask, &taskParams, NULL);*/\n\n /*****************************************************************************\n * Launch the mmWave control execution task\n * - This should have a higher priroity than any other task which uses the\n * mmWave control API\n *****************************************************************************/\n Task_Params_init(&taskParams);\n taskParams.priority = MMWDEMO_MMWAVE_CTRL_TASK_PRIORITY;\n taskParams.stackSize = 2800;\n gMmwMssMCB.taskHandles.mmwaveCtrl = Task_create(Pcount3DDemo_mmWaveCtrlTask, &taskParams, NULL);\n\n\n /*****************************************************************************\n * Create a task to do DMA based UART data transfer\n *****************************************************************************/\n /* Create a binary semaphore for application task to pend */\n Semaphore_Params_init(&semParams);\n semParams.mode = Semaphore_Mode_BINARY;\n gMmwMssMCB.uartTxSemHandle = Semaphore_create(0, &semParams, NULL);\n\n Task_Params_init(&taskParams);\n taskParams.priority = MMWDEMO_UARTTX_TASK_PRIORITY;\n taskParams.stackSize = 800;\n Task_create(MmwDemo_uartTxTask, &taskParams, NULL);\n\n /*****************************************************************************\n * Initialization of the DPM Module:\n *****************************************************************************/\n memset ((void *)&objDetInitParams, 0, sizeof(DPC_ObjectDetectionRangeHWA_InitParams));\n\n /* Note this must be after Pcount3DDemo_dataPathOpen() above which opens the hwa */\n objDetInitParams.L3ramCfg.addr = (void *)&gMmwL3[0];\n objDetInitParams.L3ramCfg.size = sizeof(gMmwL3);\n objDetInitParams.CoreLocalRamCfg.addr = &gDPCTCM[0];\n objDetInitParams.CoreLocalRamCfg.size = sizeof(gDPCTCM);\n objDetInitParams.edmaHandle = gMmwMssMCB.dataPathObj.edmaHandle;\n objDetInitParams.hwaHandle = gMmwMssMCB.dataPathObj.hwaHandle;\n\n /* DPC Call-back config */\n objDetInitParams.processCallBackFxn.processInterFrameBeginCallBackFxn =\n Pcount3DDemo_DPC_ObjectDetection_processInterFrameCallBackFxn;\n\n objDetInitParams.processCallBackFxn.processFrameBeginCallBackFxn =\n Pcount3DDemo_DPC_ObjectDetection_processFrameBeginCallBackFxn;\n\n /* Setup the configuration: */\n memset ((void *)&dpmInitCfg, 0, sizeof(DPM_InitCfg));\n dpmInitCfg.socHandle = gMmwMssMCB.socHandle;\n dpmInitCfg.ptrProcChainCfg = &gDPC_ObjDetRangeHWACfg;;\n dpmInitCfg.instanceId = DPC_OBJDET_R4F_INSTANCEID;\n dpmInitCfg.domain = DPM_Domain_DISTRIBUTED;\n dpmInitCfg.reportFxn = Pcount3DDemo_DPC_ObjectDetection_reportFxn;\n dpmInitCfg.arg = &objDetInitParams;\n dpmInitCfg.argSize = sizeof(DPC_ObjectDetectionRangeHWA_InitParams);\n\n /* Initialize the DPM Module: */\n gMmwMssMCB.objDetDpmHandle = DPM_init (&dpmInitCfg, &errCode);\n if (gMmwMssMCB.objDetDpmHandle == NULL)\n {\n System_printf (\"Error: Unable to initialize the DPM Module [Error: %d]\\n\", errCode);\n Pcount3DDemo_debugAssert (0);\n return;\n }\n\n /* Synchronization: This will synchronize the execution of the datapath module\n * between the domains. This is a prerequiste and always needs to be invoked. */\n while (1)\n {\n int32_t syncStatus;\n\n /* Get the synchronization status: */\n syncStatus = DPM_synch (gMmwMssMCB.objDetDpmHandle, &errCode);\n if (syncStatus < 0)\n {\n /* Error: Unable to synchronize the framework */\n System_printf (\"Error: DPM Synchronization failed [Error code %d]\\n\", errCode);\n Pcount3DDemo_debugAssert (0);\n return;\n }\n if (syncStatus == 1)\n {\n /* Synchronization acheived: */\n break;\n }\n /* Sleep and poll again: */\n Task_sleep(1);\n }\n\n#ifdef TRACKERPROC_EN\n /*****************************************************************************\n * Create a task to run tracker DPU at lower priority than HWA DPC\n *****************************************************************************/\n /* Create a binary semaphore for application task to pend */\n Semaphore_Params_init(&semParams);\n semParams.mode = Semaphore_Mode_BINARY;\n gMmwMssMCB.trackerDPUSemHandle = Semaphore_create(0, &semParams, NULL);\n\n Task_Params_init(&taskParams);\n taskParams.priority = MMWDEMO_TRACKERDPU_TASK_PRIORITY;\n taskParams.stackSize = 7*1024;\n Task_create(MmwDemo_trackerDPUTask, &taskParams, NULL);\n#endif\n\n /* Launch the DPM Task */\n Task_Params_init(&taskParams);\n taskParams.priority = MMWDEMO_DPC_OBJDET_DPM_TASK_PRIORITY;\n taskParams.stackSize = 7*1024;\n gMmwMssMCB.taskHandles.objDetDpmTask = Task_create(mmwDemo_mssDPMTask, &taskParams, NULL);\n\n /*****************************************************************************\n * Initialize the Profiler\n *****************************************************************************/\n Cycleprofiler_init();\n\n /*****************************************************************************\n * Initialize the CLI Module:\n *****************************************************************************/\n Pcount3DDemo_CLIInit(MMWDEMO_CLI_TASK_PRIORITY);\n\n return;\n}\n\nint main(void)\n{\n /*=======================================\n * Setup the PINMUX to bring out the MibSpiA\n *=======================================*/\n /* NOTE: Please change the following pin configuration according\n to EVM used for the test */\n\n /* SPIA_MOSI */\n Pinmux_Set_OverrideCtrl(SOC_XWR68XX_PIND13_PADAD, PINMUX_OUTEN_RETAIN_HW_CTRL, PINMUX_INPEN_RETAIN_HW_CTRL);\n Pinmux_Set_FuncSel(SOC_XWR68XX_PIND13_PADAD, SOC_XWR68XX_PIND13_PADAD_SPIA_MOSI);\n\n /* SPIA_MISO */\n Pinmux_Set_OverrideCtrl(SOC_XWR68XX_PINE14_PADAE, PINMUX_OUTEN_RETAIN_HW_CTRL, PINMUX_INPEN_RETAIN_HW_CTRL);\n Pinmux_Set_FuncSel(SOC_XWR68XX_PINE14_PADAE, SOC_XWR68XX_PINE14_PADAE_SPIA_MISO);\n\n /* SPIA_CLK */\n Pinmux_Set_OverrideCtrl(SOC_XWR68XX_PINE13_PADAF, PINMUX_OUTEN_RETAIN_HW_CTRL, PINMUX_INPEN_RETAIN_HW_CTRL);\n Pinmux_Set_FuncSel(SOC_XWR68XX_PINE13_PADAF, SOC_XWR68XX_PINE13_PADAF_SPIA_CLK);\n\n /* SPIA_CS */\n Pinmux_Set_OverrideCtrl(SOC_XWR68XX_PINE15_PADAG, PINMUX_OUTEN_RETAIN_HW_CTRL, PINMUX_INPEN_RETAIN_HW_CTRL);\n Pinmux_Set_FuncSel(SOC_XWR68XX_PINE15_PADAG, SOC_XWR68XX_PINE15_PADAG_SPIA_CSN);\n\n /* SPI_HOST_INTR - not used, reference code */\n Pinmux_Set_OverrideCtrl(SOC_XWR68XX_PINP13_PADAA, PINMUX_OUTEN_RETAIN_HW_CTRL, PINMUX_INPEN_RETAIN_HW_CTRL);\n Pinmux_Set_FuncSel(SOC_XWR68XX_PINP13_PADAA, SOC_XWR68XX_PINP13_PADAA_SPI_HOST_INTR);\n\n /*=======================================\n * Setup the PINMUX to bring out the MibSpiB\n *=======================================*/\n /* NOTE: Please change the following pin configuration according\n to EVM used for the test */\n\n /* Setup the PINMUX to bring out the MibSpiB */\n Pinmux_Set_OverrideCtrl(SOC_XWR68XX_PINF13_PADAH, PINMUX_OUTEN_RETAIN_HW_CTRL, PINMUX_INPEN_RETAIN_HW_CTRL);\n Pinmux_Set_FuncSel(SOC_XWR68XX_PINF13_PADAH, SOC_XWR68XX_PINF13_PADAH_SPIB_MOSI);\n\n Pinmux_Set_OverrideCtrl(SOC_XWR68XX_PING14_PADAI, PINMUX_OUTEN_RETAIN_HW_CTRL, PINMUX_INPEN_RETAIN_HW_CTRL);\n Pinmux_Set_FuncSel(SOC_XWR68XX_PING14_PADAI, SOC_XWR68XX_PING14_PADAI_SPIB_MISO);\n\n Pinmux_Set_OverrideCtrl(SOC_XWR68XX_PINF14_PADAJ, PINMUX_OUTEN_RETAIN_HW_CTRL, PINMUX_INPEN_RETAIN_HW_CTRL);\n Pinmux_Set_FuncSel(SOC_XWR68XX_PINF14_PADAJ, SOC_XWR68XX_PINF14_PADAJ_SPIB_CLK);\n\n Pinmux_Set_OverrideCtrl(SOC_XWR68XX_PINH14_PADAK, PINMUX_OUTEN_RETAIN_HW_CTRL, PINMUX_INPEN_RETAIN_HW_CTRL);\n Pinmux_Set_FuncSel(SOC_XWR68XX_PINH14_PADAK, SOC_XWR68XX_PINH14_PADAK_SPIB_CSN);\n\n\n /* SPIB signals are connected to PMIC and XDS110 , unless the connection is removed on XWR16\n EVM, SPI signals can not be enabled as output. */\n#if 0\n /* Enable output control for SPIB */\n if(SOC_SPIOutputCtrl(socHandle, 1U, 1U, &errCode) < 0)\n {\n /* Debug Message: */\n System_printf (\"Debug: SOC_SPIOutputCtrl failed with Error [%d]\\n\", errCode);\n goto Exit;\n }\n#endif\n\n /* SPIA DMA and interrupt signals are muxed with other IPs in the SOC.\n * Map them to SPIA.\n */\n if (SOC_selectDMARequestMapping(socHandle, SOC_MODULE_SPIA, &errCode) < 0)\n {\n /* Debug Message: */\n System_printf (\"Debug: SOC_selectDMARequestMapping (SPIA) failed with Error [%d]\\n\", errCode);\n goto Exit;\n }\n if (SOC_selectInterruptRequestMapping(socHandle, SOC_MODULE_SPIA, &errCode) < 0)\n {\n /* Debug Message: */\n System_printf (\"Debug: SOC_selectInterruptRequestMapping (SPIA) failed with Error [%d]\\n\", errCode);\n goto Exit;\n }\n\n /* Debug Message: */\n System_printf (\"**********************************************\\n\");\n System_printf (\"Debug: Launching the MMW Demo on MSS\\n\");\n System_printf (\"**********************************************\\n\");\n\n /* Initialize the Task Parameters. */\n Task_Params_init(&taskParams);\n gMmwMssMCB.taskHandles.initTask = Task_create(Pcount3DDemo_initTask, &taskParams, NULL);\n\n /* Start BIOS */\n BIOS_start();\nExit:\n return 0; \n}", + "partNumber" : " IWR6843", + "allResponseList" : [ { + "contentId" : "3321552", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 4:07 PM", + "userId" : "5118664", + "content" : "Hi Hector, Your errors are all unresolved symbols. This means the linker cannot find a compiled version of the functions you are trying to use. For example, one of your errors is \"Unresolved Symbol: SPI_init()\" - this means that the SPI library isn't properly included or linked. Please check the following: SPI and other new libraries are included in the relevant files SPI and other new libraries have a path in linker properties. Right click on the CCS project Select Properties at the bottom Select linker on the left Ensure there is a path in the linker setting to spi lib Regards, Justin" + }, { + "contentId" : "3322235", + "userName" : "Hector Ta", + "rankPoints" : "670", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 3:03 AM", + "userId" : "6292133", + "content" : "Hi Justin, I added spi lib path to the project but compile still got the same error. Please show me how to solve it with illustration photo." + }, { + "contentId" : "3322329", + "userName" : "Hector Ta", + "rankPoints" : "670", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 5:49 AM", + "userId" : "6292133", + "content" : "Hi Justin, I also tried another method to add library by clicking to mss project ->Properties->Add files. Then I chose libspi_xwr68xx.aer4f in the path C:\\ti\\mmwave_sdk_03_03_00_03\\packages\\ti\\drivers\\spi\\lib. But it still showed #10010 null: errors encountered during linking; \"3D_people_count_68xx_mss.xer4f\" not built 3D_people_count_68xx_mss C/C++ Problem null: unresolved symbols remain 3D_people_count_68xx_mss C/C++ Problem Import a library should be easy. I don't know why it failed. Here's the message when I tried to add lib file to project" + }, { + "contentId" : "3322364", + "userName" : "Hector Ta", + "rankPoints" : "670", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 6:09 AM", + "userId" : "6292133", + "content" : "Hi Justin, I got less compiling error by adding xwr68xx_spi_mss.xer4f in the path C:\\ti\\mmwave_sdk_03_03_00_03\\packages\\ti\\drivers\\spi\\test\\xwr68xx to the project. Previously, I got 13 compile errors. After added xwr68xx_spi_mss.xer4f, now I only see 4 errors. Not sure whether this is better or not. But even if I don't use SPI function and remove all SPI commands, I still have these 4 errors after adding xwr68xx_spi_mss.xer4f to my project. If I don't add it, I only got compile error when I use SPI commands. How to solve it? I expect I can use SPI/I2C within this week, but I got stuck at library linking even though it seems to be easy. 1. Here's the error after I added xwr68xx_spi_mss.xer4f error: \"could not be statically or dynamically linked null: file \"C:/ti/mmwave_sdk_03_03_00_03/packages/ti/drivers/spi/test/xwr68xx/xwr68xx_spi_mss.xer4f\" could not be statically or dynamically linked 3D_people_count_68xx_mss C/C++ Problem 2. Here's the error without xwr68xx_spi_mss.xer4f, I only added libspi_xwr68xx.aer4f in the path C:\\ti\\mmwave_sdk_03_03_00_03\\packages\\ti\\drivers\\spi\\lib" + }, { + "contentId" : "3323015", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 3:08 PM", + "userId" : "5118664", + "content" : "Hi Hector, You are linking the test library, instead you need to link the functional library. It is at: C:\\ti\\mmwave_sdk_03_03_00_03\\packages\\ti\\drivers\\spi\\lib You can read mmWave SDK module documentation here: C:\\ti\\mmwave_sdk_03_03_00_03\\docs\\mmwave_sdk_module_documentation.html - if you go through the SPI documentation, you can see all external functions, which are the ones you should be using. Do not use the \"Test\" functions unless you are specifically trying to test the functionality of the module. Regards, Justin" + }, { + "contentId" : "3323937", + "userName" : "Hector Ta", + "rankPoints" : "670", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 7:54 AM", + "userId" : "6292133", + "content" : "Hi Justin, 1. I modified my code, there's no compile error now. But I'm not sure how to test SPI function with UART GUI. As my understanding, we must connect PC to FTDI port on MMWAVEICBOOST in order to use SPI, right? If it's right, do I need to change S1 switch as below to use FTDI? The problem is: after I switched as above and connect PC to FTDI port, I don't see any port number on PC Device Manager to connect device to GUI even though I installed FTDI driver on Windows. How to connect? 2. I see in test_common.c in the path C:\\ti\\mmwave_sdk_03_03_00_03\\packages\\ti\\drivers\\spi\\test\\common has a function MCPI_setFeatureTestResult ((const char *)&testCase[0], MCPI_TestResult_PASS); I think it's to test whether SPI pass or not. But I can't find where its declaration located. Please tell me more about MCPI_setFeatureTestResult if it's really used to test SPI. 3. How can we send data from IWR6843 to MMWAVEICBOOST via SPI, then send to PC via UART and display on GUI? Below is some basic SPI function in my code, but I don't know how to combine it with UART data transfer to check whether SPI works well and display tracking on GUI correctly. static int32_t Test_spiReadWrite(const SPI_Handle handle, uint32_t dataLen, void* inBuffer, void* outBuffer, uint8_t slaveIndex)\n{\n SPI_Transaction transaction;\n\n /* Configure Data Transfer */\n transaction.count = dataLen;\n transaction.txBuf = outBuffer;\n transaction.rxBuf = inBuffer;\n transaction.slaveIndex = slaveIndex;\n\n /* Start Data Transfer */\n if (SPI_transfer(handle, &transaction) != true)\n {\n return -1;\n }\n return 0;\n}\n\nvoid MmwDemo_mssInitTask(UArg arg0, UArg arg1)\n{\n// UART function\n\n UART_init();\n}\n\nint main(void)\n{\n //handle = SPI_open(someSPI_configIndexValue, ¶ms);\n handle = SPI_open(0, ¶ms);\n if (!handle) {\n System_printf(\"SPI did not open\");\n }\n\n /* Initialize the Task Parameters. */\n Task_Params_init(&taskParams);\n taskParams.priority = 3;\n taskParams.stackSize = 4*1024;\n Task_create(MmwDemo_mssInitTask, &taskParams, NULL);\n}" + }, { + "contentId" : "3324499", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 3:19 PM", + "userId" : "5118664", + "content" : "Hi Hector, The FTDI port on the ICBOOST is only for mmWave studio direct control. We don't provide a driver for SPI to windows PC interface. To use the SPI connection, you will need to set the device in 40 Pin BP/LP mode, then connect some other device (like a beagle bone raspberry pi) to SPI pins. Regarding test code - these are unit tests that can be used to ensure the SPI driver is functioning correctly. Unit test documentation is here: /docs/mmwave_sdk_unit_test_procedure.pdf You should not be using any of the test functions in your application. Regards, Justin" + }, { + "contentId" : "3325456", + "userName" : "Hector Ta", + "rankPoints" : "670", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 9:45 AM", + "userId" : "6292133", + "content" : "Hi Justin, I checked mmwave_sdk_unit_test_procedure.pdf as you said. It mentions we can test SPI on PC via FTDI port by setting gXWR1xxxSlaveWithFTDITest = 1. But I'm still unclear how to check whether SPI function works well in this case. If I write SPI transfer function correctly, and connect IWR6843 EVM from FTDI port to PC USB port. Thencompany GUI can still display tracking ? Orcompany GUI for IWR6843 3D people counting is only to demo via UART on XDS110 port and can't read SPI data from FTDI port?" + }, { + "contentId" : "3327244", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 3:54 PM", + "userId" : "5118664", + "content" : "Hi Hector, I believe Charles answered your questions here: /support/sensors/f/1023/t/897434 - SPI will come out, but we don't have applications that support it, so you will have to find a python library that parses SPI. Regards, Justin" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR6843", "/support/sensors/f/1023/tags/code%2bComposer%2bstudio", "/support/sensors/f/1023/tags/_2300_SPI" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898385.json b/data/json/DLP/898385.json new file mode 100644 index 0000000000000000000000000000000000000000..c7a260b1fd0ef59def4320bfaaa8eaf509b33aa0 --- /dev/null +++ b/data/json/DLP/898385.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "898385", + "reporterName" : "Amruta T", + "rankPoints" : "120", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "WEBENCH® Tools/PGA400-Q1: Not able to download GUI for PGA400-Q1 IC", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 51", + "queryText" : "Part Number: PGA400-Q1 Tool/software: WEBENCH® Design Tools Hi, I'm not able to download GUI of PGA400-Q1. From where i can download its GUI? Thanks & Regards, Amruta", + "partNumber" : " PGA400-Q1", + "allResponseList" : [ { + "contentId" : "3321642", + "userName" : "Scott Cummins", + "rankPoints" : "22105", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 4:53 PM", + "userId" : "3747857", + "content" : "Hello Amruta, Please go to the PGA400 page here: https:///product/PGA400-Q1 Under \"More Information\" click to request the datasheet. Once you have been approved, the GUI is available in the mySecure Software page for the PGA400. Regards," + }, { + "contentId" : "3325417", + "userName" : "Amruta T", + "rankPoints" : "120", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 8:50 AM", + "userId" : "6022830", + "content" : "Hello Scott, Thanks for the reply. Also can i get sample program and programming guide for this IC which will accelerate our development process? Thanks & Regards, Amruta Tundurwar" + }, { + "contentId" : "3326120", + "userName" : "Scott Cummins", + "rankPoints" : "22105", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 6:23 PM", + "userId" : "3747857", + "content" : "Hi Amruta, Can you please give some more details about your application? Is this used for a pressure or current sensing application? Or some capacitive sensing? For pressure sensing in an automotive environment where Q1 qualification is needed I recommend looking into the PGA302 instead. It is currently only available in a commercial version, but an automotive qualified version is planned to be released this year. There will also be a PGA902 which uses the same analog front end and output stage but allows for programming of an internal M0 microcontroller with user-created firmware. The PGA305, PGA300, and PGA900 are all also good options for a pressure sensing application if automotive qualification is not needed. E2E support for firmware development for the PGA400 is limited at this point. There is some example code posted in this earlier thread on E2E: /support/data-converters/f/73/t/687713 but we cannot currently provide any additional development support outside of what is included in that package, and the PGA400 documentation already available on . Regards," + }, { + "contentId" : "3327786", + "userName" : "Amruta T", + "rankPoints" : "120", + "rankName" : "Prodigy", + "date" : "Apr 25, 2020 5:57 AM", + "userId" : "6022830", + "content" : "Hi Scott, It is for current sensing application. We are using SPI communication for it. But i'm not getting any SPI sequence writing sequence for programming PGA400Q1 IC. Also i'm not able to download the GUI for it. Please help me with it. Thanks & Regards, Amruta Tundurwar" + } ], + "tags" : [ "/support/sensors/f/1023/tags/WEBENCH_AE00_%2bDesign%2bTools", "/support/sensors/f/1023/tags/PGA400_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898389.json b/data/json/DLP/898389.json new file mode 100644 index 0000000000000000000000000000000000000000..ae806d8cc679e364a4fc80c735c15cc9e6ee38f5 --- /dev/null +++ b/data/json/DLP/898389.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "898389", + "reporterName" : "Nithin HS", + "rankPoints" : "30", + "resolutionStatus" : "", + "ticketName" : "BQ34210-Q1: Calibration validation", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 25", + "queryText" : "Part Number: BQ34210-Q1 1). What does Coulomb counter offset(CC offset) mean and what would be the expected offset value?, when should we do this calibration?(Is it while charging or discharging) 2). What does Board offset mean and what would be the expected offset value ?, when should we do this calibration? 3).Whenever we write a CC gain register ,CC delta value automatically updates(is this expected), also if we try writing the CC Delta value it will not get updated. 4).As per the CC gain calibration section discharge current will be positive is what is written but we get negative raw current while discharging please clarify the polarity. 5).What is the impact of above calibrations on SOC value? Resource for calibration used:- /lit/pdf/SLUA640", + "partNumber" : " BQ34210-Q1", + "allResponseList" : [ { + "contentId" : "3321621", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 4:41 PM", + "userId" : "1864278", + "content" : "Can you upload the image again? Andy" + }, { + "contentId" : "3322293", + "userName" : "Nithin HS", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 4:51 AM", + "userId" : "6317832", + "content" : "" + }, { + "contentId" : "3323385", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 7:46 PM", + "userId" : "1864278", + "content" : "The image never shows. Can you double-check? Andy" + }, { + "contentId" : "3323798", + "userName" : "Nithin HS", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 5:33 AM", + "userId" : "6317832", + "content" : "Ok looks like some issue with image uploading, I will give you reference to the document please refer 2nd comment in the flowchart of 9th section i.e current calibration in this document /.../SLUA640" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ34210_2D00_Q1", "/support/power-management/f/196/tags/BQ34210_2D00_Q1%2b_2D00_%2bCalibration%2bvalidation" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898402.json b/data/json/DLP/898402.json new file mode 100644 index 0000000000000000000000000000000000000000..9f565725d2f5bfc42e4229cb6e35388270366803 --- /dev/null +++ b/data/json/DLP/898402.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "898402", + "reporterName" : "Tommy Tzeng", + "rankPoints" : "1320", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ27750: Chemistry ID selection", + "rankName" : "Expert", + "replies" : " 4", + "views" : " 30", + "queryText" : "Part Number: BQ27750 Hi Team, question for BQ27750 chemistry ID selection. 1. Battery Pack: Charge Voltage: 4.35V，Discharge Cut-off Voltage: Cut-off 3.0V 2.how to choose many suitable chemical ID of GPCCHEM?(same capacity? material and voltage?) 3.please kindly help to select the applicable chemistry ID,thsnk. 4.Attachment is Config-report: GPCCHEM return data and Polymer 955255: Cell Spec. 0602.Config-report.zip 955255-4200mAh-3.8V电芯规格书 A0 20190910.pdf", + "partNumber" : " BQ27750", + "allResponseList" : [ { + "contentId" : "3321510", + "userName" : "Rushi Dalal38", + "rankPoints" : "210", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 3:44 PM", + "userId" : "4375016", + "content" : "Hi Tommy, Please refer to: /lit/an/slva725a/slva725a.pdf Typically recommend to use a ChemID that have <3% error match. Thanks, Rushi" + }, { + "contentId" : "3321512", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 3:45 PM", + "userId" : "1864278", + "content" : "Hi Tommy, You can use the best matching id 1216 that is already recommended in the GPC report. Andy" + }, { + "contentId" : "3321884", + "userName" : "Rushi Dalal38", + "rankPoints" : "210", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 7:48 PM", + "userId" : "4375016", + "content" : "Tommy, ChemID 3162 appears to be a closer match in regards to charging voltage and capacity. Thanks, Rushi" + }, { + "contentId" : "3323763", + "userName" : "Tommy Tzeng", + "rankPoints" : "1320", + "rankName" : "Expert", + "date" : "Apr 22, 2020 4:19 AM", + "userId" : "5169797", + "content" : "Hi Rushi & Andy, thanks for your suggestion and grest support, if we still have question, we will provide again,thanks." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ27750", "/support/power-management/f/196/tags/GPCCHEM" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898407.json b/data/json/DLP/898407.json new file mode 100644 index 0000000000000000000000000000000000000000..f94077646a868f50349398b9e39ac43a1b6b104f --- /dev/null +++ b/data/json/DLP/898407.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "898407", + "reporterName" : "Amelie Zheng", + "rankPoints" : "3660", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ24196: Why Sys has a drop voltage", + "rankName" : "Expert", + "replies" : " 2", + "views" : " 10", + "queryText" : "Part Number: BQ24196 Hi Team, My customer now use BQ24196. When they connected with battery, it is normal and no voltage dropped. When they don't connect with battery, SYS has a voltage dropped when 3.3V power up but no load in 3.3V. I asked them to add SYS output cap bigger. Do you have more suggestion？ Thanks！", + "partNumber" : " BQ24196", + "allResponseList" : [ { + "contentId" : "3322115", + "userName" : "Ning T", + "rankPoints" : "15365", + "rankName" : "Genius", + "date" : "Apr 21, 2020 12:37 AM", + "userId" : "145100", + "content" : "Hi, What is channel 3 (blue)? BTW, Please visit /support/power-management/f/196/t/877725 for BQ2419X: Schematic Review and PCB Layout Design Tips and /support/power-management/f/196/t/875388 for BQ2419X/2429x FAQs.BQ24196 is similar to BQ24192. Thanks, Ning." + }, { + "contentId" : "3329857", + "userName" : "Ning T", + "rankPoints" : "15365", + "rankName" : "Genius", + "date" : "Apr 28, 2020 4:04 AM", + "userId" : "145100", + "content" : "Hi, We haven’t heard back from you for a while, the thread is considered solved and closed. Thanks, Ning." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24196" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898415.json b/data/json/DLP/898415.json new file mode 100644 index 0000000000000000000000000000000000000000..652183aed979aae0a1e0fd813cce022c21bae009 --- /dev/null +++ b/data/json/DLP/898415.json @@ -0,0 +1,71 @@ +{ + "ticketNumber" : "898415", + "reporterName" : "Devayani Bodar", + "rankPoints" : "85", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ76940: BQ76940 used for 12 cell configuration : charge discharge Mosfet ON /OFF issue due to UV", + "rankName" : "Prodigy", + "replies" : " 7", + "views" : " 27", + "queryText" : "Part Number: BQ76940 Dear Team, We wanted to use BQ76940 used for 12 cell configuration : we are facing problem with charge & discharge Mosfet ON /OFF due to UV. we are able to read all the cell voltage as per cell shorted 12 Series configuration. no issue in cell reading. whatever cells are shorted are reading as 0.050V and it is as expected. We are able to turn on Charge Mosfet but discharge mosfet is not turning on due to again and again fault is getting generated due to UV. 1. How we can avoid UV problem, what will be setting in SW registers? 2. can we turn on both mosfet during charging & discharging? 3. As per my understanding if voltage below 0.5V will not be considered as UV fault, is this understanding correct? Thanks, Devayani", + "partNumber" : " BQ76940", + "allResponseList" : [ { + "contentId" : "3321534", + "userName" : "Matt Sunna", + "rankPoints" : "24930", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 3:55 PM", + "userId" : "269312", + "content" : "Hi Devayani, The UV problem is likely caused by the low cell reading issue you are investigating in the other thread: /support/power-management/f/196/t/894969 Solving that issue will most likely solve the UV issue you are seeing as well. I will continue to support you in the other thread and close this one. Best regards, Matt" + }, { + "contentId" : "3322646", + "userName" : "Devayani Bodar", + "rankPoints" : "85", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 11:01 AM", + "userId" : "4478295", + "content" : "Dear Matt, Other thread , I have closed, because that issue is resolved. can you help for this issue of UV and turning on MOSFET for CHG and DSCG. Now All Cell voltage readings are stable with 10mV accuracy, that is really good. Thanks, Devayani" + }, { + "contentId" : "3323145", + "userName" : "Matt Sunna", + "rankPoints" : "24930", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 4:33 PM", + "userId" : "269312", + "content" : "Hi Devayani, Now that the cell voltages are reading correctly, the UV fault should only occur if the cell voltage is truly low. The under-voltage setting can be adjusted in the UV_TRIP register. An under-voltage condition on one of the cells will always cause the DSG FET to open. If the CHG FET is opening, it may be because of a different fault, so you should read the SYS_STAT register to see which fault is occurring. You can enable the FETs using the SYS_CTRL2 register. Best regards, Matt" + }, { + "contentId" : "3323742", + "userName" : "Devayani Bodar", + "rankPoints" : "85", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 3:50 AM", + "userId" : "4478295", + "content" : "Hi Matt, Thanks for feedback. We will test based on your feedback today and update you further progress. Just for an information: we are reading 0.050V cell voltage (All three group 4th cell reading) which is externally shorted at input side to make 12 cell configuration. Meanwhile please clarify below questions; 1. As per our understanding if cell voltage below 0.5V read by BQ then BQ will not trigger UV fault, is this understanding correct? 2. What is minimum voltage limit set in BQ for under-voltage trigger? 3. How BQ will understand that externally 15Cell or 12Cells are connected physically or different cell configuration as per data sheet? , and trigger UV fault? 4. if we do any wrong calculation (adding off set, ADC gain etc..) in CRC while reading cell voltage, is there any chance to trigger UV fault? Thanks, Devayani" + }, { + "contentId" : "3324473", + "userName" : "Matt Sunna", + "rankPoints" : "24930", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 3:08 PM", + "userId" : "269312", + "content" : "Hi Devayani, That is correct - if the voltage is below an ADC reading of 0x0518 (which is around 0.5V), the device will consider this a shorted connection and not a real cell. If you made the shorted connections after connecting the cells, the device may need to be reset. You can either cycle power or send the commands to put the device into SHIP mode, then toggle the TS1 pin to boot the device. Best regards, Matt" + }, { + "contentId" : "3325517", + "userName" : "Devayani Bodar", + "rankPoints" : "85", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 11:10 AM", + "userId" : "4478295", + "content" : "Hi Matt, We will test and update you as per your suggestion. meanwhile please answer below questions; 2. What is minimum voltage limit set in BQ for under-voltage trigger? 3. How BQ will understand that externally 15Cell or 12Cells are connected physically or different cell configuration as per data sheet? , and trigger UV fault? 4. if we do any wrong calculation (adding off set, ADC gain etc..) in CRC while reading cell voltage, is there any chance to trigger UV fault? Thanks, Devayani" + }, { + "contentId" : "3325862", + "userName" : "Matt Sunna", + "rankPoints" : "24930", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 3:37 PM", + "userId" : "269312", + "content" : "Hi Devayani, I believe these questions are all answered in the datasheet - see page 25 where there is a detailed discussion on setting under-voltage and over-voltage thresholds. This will answer questions #2, #3, and #4. (See the NOTE in the middle of the page which directly answers question #3). Matt" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ76940" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898417.json b/data/json/DLP/898417.json new file mode 100644 index 0000000000000000000000000000000000000000..1a35265810f11466b7c9c5c3211bd4ee4e774bd2 --- /dev/null +++ b/data/json/DLP/898417.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898417", + "reporterName" : "Howard Zou", + "rankPoints" : "8315", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS54620: how to calculate the power dissipation of the device?", + "rankName" : "Expert", + "replies" : " 3", + "views" : " 30", + "queryText" : "Part Number: TPS54620 Hi, there is an app note that tells us how to calculate efficiency and it's written based on TPS54620 /lit/an/slva390a/slva390a.pdf On page 5 equation (16), P=Io*Io*Rdcr=4A*4A*0.104ohm=166.4mW which is wrong, it should be 1.664W. If it's 1.664W, then equation (17) other losses would be negative. So I would like to know where is wrong? Further more, I ask this question because my customer would like to calculate the junction temperature By using Tj= Ttop+ ψJT*(power dissipation on device). Then we need to calculate the power dissipation on device. But how can we calculate that? Is it (Pfet+other losses) described in the app note above SLVA390A?", + "partNumber" : " TPS54620", + "allResponseList" : [ { + "contentId" : "3321208", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Apr 20, 2020 1:13 PM", + "userId" : "24596", + "content" : "Howard, The mistake is in the inductor DCR. It should be 10.4 mohm, not 0.104 ohm." + }, { + "contentId" : "3321408", + "userName" : "Anthony F", + "rankPoints" : "30845", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 2:54 PM", + "userId" : "1559531", + "content" : "Hi Howard, Is the customer trying to estimate the junction temperature based on some ambient temperature condition or is the customer trying to calculate the junction temperature based on a measurement? The Psi JT number is used for estimating the junction temperature based on a measurement of the temperature at the top of the IC package. As this is a measurement, the customer could measure the efficiency or power loss at the same time the temperature is measured. The DC and AC power loss in the inductor should be subtracted from the total power loss. Additionally, as Psi JT number is generally very small, the junction temperature is very close to the temperature at the top of the IC package." + }, { + "contentId" : "3326357", + "userName" : "Gerold Dhanabalan - Online Design Tools", + "rankPoints" : "8770", + "rankName" : "Expert", + "date" : "Apr 23, 2020 10:48 PM", + "userId" : "1132529", + "content" : "Hi Howard, Just trying to follow up on Anthony's question. Regards, Gerold" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS54620" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898419.json b/data/json/DLP/898419.json new file mode 100644 index 0000000000000000000000000000000000000000..8b58c8b7ef746ba645d7179ddf0a0eb7b6833f36 --- /dev/null +++ b/data/json/DLP/898419.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898419", + "reporterName" : "Sander Baten NL", + "rankPoints" : "30", + "resolutionStatus" : "", + "ticketName" : "BQ24210: VBat 0V even with 5V input and ~EN tied to ~PG.", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 50", + "queryText" : "Part Number: BQ24210 Hello, We have a problem with the BQ24210. We use the following schematic: Whenever we connect a USB wall charger we measure Vbus = 5V, ~EN = ~PG = 0V (J8 is mounted) but the battery(1S2P or 1S3P), connected to K6, is not being charged. Vbat = 0V, due to the battery being in protection mode. Protection mode will release when a charger is connected. This is tested; applying a positive voltage to the battery + terminal releases the protection. VDPM, ~PG(and so ~EN_CHR) and ~CHG are connected to high impedance uC inputs. Can someone please advise on this? If needed, I can provide additional measurement data, please let me know. Thanks in advance, Sander Baten Embedded System Engineer", + "partNumber" : " BQ24210", + "allResponseList" : [ { + "contentId" : "3322298", + "userName" : "Bill Johns", + "rankPoints" : "46985", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 5:02 AM", + "userId" : "244698", + "content" : "Hello Sander When you apply USB power (+5V) do you see any voltage out? If viewed with a scope do you seen voltage increase at all? Unit should enter battery detect mode and try to apply power. The device has a battery short protection feature, if the battery voltage is below 0.8V output current is limited to 17mA. If OUT / Battery has a load on it during start up that draws more than 17mA voltage will not increase and output will remain at 0V." + }, { + "contentId" : "3322851", + "userName" : "Sander Baten NL", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 1:33 PM", + "userId" : "6255985", + "content" : "Hello Bill, Thanks for your answers. I measured at the Vbat, and there was no rise in voltage. However, we found out that there is a voltage present in both of the following situations: - Attaching USB Power - OR Connect VDPM to VSS for short time - OR Connect Vbus to Vbat for a short time As long as we don't disconnect the VBus, the systems keeps delivering power, even without battery. Can you explain this? Triggering VDPM every time a battery is 0V could be an option for the on-board controller, but we would like to know what is going on to make sure we do the right thing. Sander" + }, { + "contentId" : "3324367", + "userName" : "Sander Baten NL", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 2:08 PM", + "userId" : "6255985", + "content" : "Hi Bill, We have changed our PCB layout to support the VDPM tying to VSS with the microcontroller to start the system when this situation occurs. We can program this, but we want to make sure that this is not causing any other problems or that the problem is caused by something else. Hoping to hear from you soon, Sander Baten" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24210" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898425.json b/data/json/DLP/898425.json new file mode 100644 index 0000000000000000000000000000000000000000..2c744ce8226ee210238827dd9e3cef660a78654b --- /dev/null +++ b/data/json/DLP/898425.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898425", + "reporterName" : "5949651", + "rankPoints" : "80", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ4050: LED Display, Auto Start of FETs, SMB Bus connection", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 25", + "queryText" : "Part Number: BQ4050 I have a custom board with BQ4050 and BQ25703a and an EV2400 for development purpose. So far everything works as expected but I do have some minor issues/questions: I have the /DISP pin shortened to GND. Is it still possible to drive the LEDs to indicate SOC? I plan for a battery that is NR, and the NR bit is set. However, for development purposes I can disconnect the battery over a connector to power the system off. Whenever I connect the battery to the system, the FETs won't turn on, I have to frist put in the power adapter and then the FETs turn on. Is there a way to turn on FETs automatically when BQ4050 detects a battery? Note: PRES is permanently connected to GND. I can read the BQ4050 registers with ESP32. However, after a couple of minutes I cannot read certain values (e.g. cell voltages) anymore, althought some value are still readable (e.g. SOC). Any ideas on this issue?", + "partNumber" : " BQ4050", + "allResponseList" : [ { + "contentId" : "3321618", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 4:38 PM", + "userId" : "1864278", + "content" : "See my answers below. I have the /DISP pin shortened to GND. Is it still possible to drive the LEDs to indicate SOC? [Andy]No. As you see in the TRM, the bq4050 device has an LED display that shows various status information when a high-to-low transition of the DISP pin is detected. I plan for a battery that is NR, and the NR bit is set. However, for development purposes I can disconnect the battery over a connector to power the system off. Whenever I connect the battery to the system, the FETs won't turn on, I have to frist put in the power adapter and then the FETs turn on. Is there a way to turn on FETs automatically when BQ4050 detects a battery? Note: PRES is permanently connected to GND. [Andy] No. The gauge assumes it works in the NON-REMOVABLE mode since the NR bit has been set. I can read the BQ4050 registers with ESP32. However, after a couple of minutes I cannot read certain values (e.g. cell voltages) anymore, althought some value are still readable (e.g. SOC). Any ideas on this issue? [Andy]Try bqStudio and see if you can see the same problem." + }, { + "contentId" : "3321732", + "userName" : "5949651", + "rankPoints" : "80", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 5:50 PM", + "userId" : "5949651", + "content" : "Thank you. I would have another 2 question: When is a secondary cell voltage monitor (e.g. bq294502) necessary in addition to bq4050 and bq25703a? Is there any further reading available on this topic? It seems like bq28z610 would be a suitable replacement for my application, as it has a lower external component count and I only have a 2s config. Would this be an appropriate replacement? Are there any drawbacks (e.g. more effort to calibrate or set up)?" + }, { + "contentId" : "3323376", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 7:40 PM", + "userId" : "1864278", + "content" : "See my comments below. 1) See this thread /support/power-management/f/196/t/616636. 2) BQ4050 a CEDV based gauge while BQ28z610 is an Impedance Track gauge. Normally, bq28z610 is able to provide more accurate SoC prediction. In addition, bq28z610 needs a correct chemistry id to work properly and also a learning cycle needs to be done. Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25703A", "/support/power-management/f/196/tags/BQ4050", "/support/power-management/f/196/tags/EV2400" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898434.json b/data/json/DLP/898434.json new file mode 100644 index 0000000000000000000000000000000000000000..a24b01407d9873d4899cd4483d61bbcdf8f2e578 --- /dev/null +++ b/data/json/DLP/898434.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "898434", + "reporterName" : "user6306860", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCD9248： three UCD9248 can’t be scanned at the same time", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 36", + "queryText" : "Part Number: UCD9248 I am usingcompany 's software Fusion Digital Power Designer to configure UCD9248. My hardware schematic is same with the Xilinx KC705 board. There are three UCD9248 on my board. When I connect the PC and my board with TI's USB-to-GPIO, the three UCD9248 can’t be scanned at the same time, and in most cases only one UCD9248 is scanned. In the kc705 board, the 1-pin voltage of the transistor FCX491A is 4.0v, and the 3-pin voltage is 3.3v, but the measured results of our board are 3.3v and 2.7v respectively.According to the UCD9248 datasheet, the voltage of V33FB port is 4-4.6v, and the voltage of V33D port is 3.3-3.6v. At first, I thought that the voltage of the my board was insufficient to supply UCD9248, so it could not be scanned. Therefore, the power supply circuit of the first UCD9248 was adjusted. When the resistance R3 was changed to 2K, the same voltage value as Xilinx KC705 board could be obtained. However, the scan results did not change. The second question is when the first chip is scanned, the address is not the same as the theoretical value. The addr-0 and addr-1 pins are connected with 75K resistors . The theoretical address value is 52, but when it is scanned, the address value is 42. The address values of the other two UCD9248 are the same as the theoretical values. Please give me some suggestions. Thank you very much.", + "partNumber" : " UCD9248", + "allResponseList" : [ { + "contentId" : "3321794", + "userName" : "Qian Chen", + "rankPoints" : "21370", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 6:37 PM", + "userId" : "1501908", + "content" : "Hello, Which Fusion version are you using? Thanks Qian" + }, { + "contentId" : "3322210", + "userName" : "user6306860", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 2:33 AM", + "userId" : "6306860", + "content" : "Hello,Qian,we use Fusion Digital Power Designer 7.2.1. Thanks." + }, { + "contentId" : "3324340", + "userName" : "Qian Chen", + "rankPoints" : "21370", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 1:55 PM", + "userId" : "1501908", + "content" : "Hi, I don't know why address 52 is scanned as 42. Can you double check the resistor value? For the issue that Fusion can not find all devices, I'm checking with Fusion team if they have any idea. As a work around solution, you can let Fusion to scan device at particular address. By this way, they can find device at any address. For example, at below screenshot, the Fusion will only scan the part at address 52." + }, { + "contentId" : "3326034", + "userName" : "Anne Ngo77", + "rankPoints" : "2310", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 5:21 PM", + "userId" : "1433683", + "content" : "Hi, 1. The issue with scanning 3 devices at the same time and can only detect one: might due to devices' addresses (#2 below) => communication issue. Try fixing #2 and see if #1 is also fixed. 2. The issue with device's theoretical address (52) being scanned as 42 might due to resistor tolerance. Try using different resistors, avoid using resistor at the boundary such as 75 kOhm. Due to resistor tolerance and voltage level, address bin might be 4, or 5, or 3. Try, for example, resistor 68 kOhm (between 75K and 64.9K) and see if it fix the issue. Regards Anne Ngo customer organization" + } ], + "tags" : [ "/support/power-management/f/196/tags/HSA", "/support/power-management/f/196/tags/UCD9248", "/support/power-management/f/196/tags/USB_2D00_to_2D00_GPIO" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898441.json b/data/json/DLP/898441.json new file mode 100644 index 0000000000000000000000000000000000000000..df2c8e25569df7d3a157d9bc9ad6b982a4592ce2 --- /dev/null +++ b/data/json/DLP/898441.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898441", + "reporterName" : "Zhanpeng Li", + "rankPoints" : "570", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ25890: several quesions in bq25890", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 25", + "queryText" : "Part Number: BQ25890 Hi team, this is brandon. i'm facing several question related to register. 1) while we almost finish charging process, the charger IC would report interrupt information interimittent. we also faced this situation, when cell was almost finish charging, if we pulg in the adapter for charging, the charger IC would constantly report interrupt; sometimes the VSYS_Regulation Status would set to 1; 2) when the system shut off, if we plug in TYPE-C to restart the system, whether should we reset the register first? how long should we wait when the register would update the value?(sometimes we found that when plug in TYPE-C to restart the system, the battery was not in charging state, during this time, the VBUS_STAT was 00, and CHRG_STAT was 0); BR Brandon.", + "partNumber" : " BQ25890", + "allResponseList" : [ { + "contentId" : "3322142", + "userName" : "Ning T", + "rankPoints" : "15365", + "rankName" : "Genius", + "date" : "Apr 21, 2020 1:20 AM", + "userId" : "145100", + "content" : "Brandon, 1) The following events will generate 256-µs INT pulse including charge complete and adaptor plugging in. • USB/adapter source identified (through PSEL or DPDM detection, with OTG pin) • Good input source detected – VBUS above battery (not in sleep) – VBUS below VACOV threshold – VBUS above VVBUSMIN (typical 3.8 V) when IBADSRC (typical 30 mA) current is applied (not a poor source) • Charge Complete • Input removed • Any FAULT event in REG0C 2) a. If there are no valid VBUS and VBAT, the device will power-on-reset when plugging in valid adaptor. And all the registers are reset to default value. b. If valid VBAT is present, then plugging in valid adaptor, after the Input Source Type Detection is done, an INT pulse is asserted to the host. In addition, the following registers including Input Current Limit register (IINLIM), VBUS_STAT, SDP_STAT and Input Voltage Limit (VINDPM) etc are updated, other writable registers should be unchanged. Thanks, Ning" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25890" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898446.json b/data/json/DLP/898446.json new file mode 100644 index 0000000000000000000000000000000000000000..63c09af7670c22a7c797689214decb0ad58ca538 --- /dev/null +++ b/data/json/DLP/898446.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "898446", + "reporterName" : "John LaGreca", + "rankPoints" : "60", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ28Z610: Unable to write to Data Flash memory using Advanced Communication tab.", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 37", + "queryText" : "Part Number: BQ28Z610 Attempting to write to the Data Flash section of the device. I am successfully able to write to a Data Flash location to modify a parameter using the Data Memory tab of BQ Studio but am unable to perform this write executing the identical bus sequence with the Advanced Communication tab (nor in code as well). I have verified the bus sequences are identical using an I2C protocol analyzer yet when I write with the Advanced Com tab in BQ Studio the flash write does not persist when I read back the value (old value remains). Other than timing perhaps, what would be the difference between using the Data Memory tab vs the Advanced Com tab to perform the Data Flash write even though the bus sequences are identical?", + "partNumber" : " BQ28Z610", + "allResponseList" : [ { + "contentId" : "3321519", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 3:47 PM", + "userId" : "1864278", + "content" : "Take a look a the following thread. /support/power-management/f/196/t/738029 Andy" + }, { + "contentId" : "3322084", + "userName" : "John LaGreca", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 11:40 PM", + "userId" : "3866203", + "content" : "Thank you Andy for your prompt reply. This thread solved my issues. It was related to checksum and length. I will flag as resolved. One other question: Is it true that in order to simply read the data flash the device must have unsealed access? It seems this is true. I find this very, very unfortunate as just to check if a feature is enabled/disabled the risk of unsealing the device is required. Is there any work-around for this?" + }, { + "contentId" : "3323193", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 5:11 PM", + "userId" : "1864278", + "content" : "No. In SEALED mode, standard register information is accessible. Extended MAC Commands functions and data flash are NOT accessible." + }, { + "contentId" : "3323213", + "userName" : "John LaGreca1", + "rankPoints" : "35", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 5:25 PM", + "userId" : "6328474", + "content" : "This is most unfortunate that there is not a method to simply check if a feature is enabled/disabled without unsealing. I feel at a MINIMUM the Manufacturer Info Block data should be readable while unsealed so you could at least flag if you have previously enabled/disabled a setting. Thank you." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ28Z610", "/support/power-management/f/196/tags/BQ28Z610%2bDataFlash" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898459.json b/data/json/DLP/898459.json new file mode 100644 index 0000000000000000000000000000000000000000..4c49d3e9cbc48a1492732a620165f67d533f82b7 --- /dev/null +++ b/data/json/DLP/898459.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "898459", + "reporterName" : "Robert Finger", + "rankPoints" : "13190", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC12040: EMI radiation data", + "rankName" : "Genius", + "replies" : " 4", + "views" : " 39", + "queryText" : "Part Number: UCC12040 Team, Do we have EMI measurements of how the UCC12040 behaves? A customer of mine would like to see some real measurements done on a reference board. Thanks, Robert", + "partNumber" : " UCC12040", + "allResponseList" : [ { + "contentId" : "3322513", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 8:47 AM", + "userId" : "1139254", + "content" : "Hi Robert, I will need to ask my colleagues in the US. I hope to have a response later today. Regards Peter" + }, { + "contentId" : "3325478", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 10:23 AM", + "userId" : "1139254", + "content" : "Hi Robert, I have attached for the UCC12050 which will have the same behaviour as the UCC12040. Regards PeterRE All 30-1000MHz Magneto SSM2Layer 50 ohm Load_Graph_Horizontal.pdfRE All 30-1000MHz Magneto SSM2Layer 50 ohm Load_Graph_Vertical.pdfRE All 30-1000MHz Magneto SSM2Layer 50 ohm Load_Table_Horizontal Pre-Sc....pdfRE All 30-1000MHz Magneto SSM2Layer 50 ohm Load_Table_Vertical Pre-Scan....pdf Regards Peter" + }, { + "contentId" : "3326175", + "userName" : "Robert Finger", + "rankPoints" : "13190", + "rankName" : "Genius", + "date" : "Apr 23, 2020 7:43 PM", + "userId" : "29333", + "content" : "Thanks Peter! But there is an additional question. In All 30-1000MHz Magneto SSM2Layer 50 ohm Load_Graph_Horizontal.pdf the first peak at 38.23 MHz is only 5 dB below the limit. Looks like a 50 Ohm resistive load was used. Would be better to use an 'artifical Hand' (220pF + 510Ω) to GND, as this is what regulations like EN 60601-1-2 ask for. Do we also have such measurements? Best regards, Robert" + }, { + "contentId" : "3327281", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 4:13 PM", + "userId" : "1139254", + "content" : "Hi Robert, That is all that we have, I will feed your comments back to the team it looks like EN 60601-1-2 is targeted to medical devices, I think the team are probably focused on the industrial market in the first instance so the requirements may be different. How much margin are you looking for from the limit line? Regards Peter" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC12040" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898468.json b/data/json/DLP/898468.json new file mode 100644 index 0000000000000000000000000000000000000000..c8e81ac107904fb3a73a6946512ee102331b0836 --- /dev/null +++ b/data/json/DLP/898468.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898468", + "reporterName" : "Toyota-1", + "rankPoints" : "810", + "resolutionStatus" : "", + "ticketName" : "CCS/IWR6843: HAVC Tuning Question", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 22", + "queryText" : "Part Number: IWR6843 Tool/software: Code Composer Studio Dearcompany We have scan SNR value of HAVC lab with our in-house design module with 6843 as below. 1 Our question why have this SNR result ? What is the root cause ? Antenna design or DOA setting issue ? 2 DOA parameter how to setting ? We can not find any user guide for tuning . 3. SNR how to improve ? 4. It's a big issue at people counting have different region SNR . Any suggestion ? doaCfg.estAngleRange = (float) atoi (argv[1]) * 0.1f; doaCfg.estAngleResolution = (float) atoi (argv[2]) * 0.001f; doaCfg.gamma = (float) atoi (argv[3]) * 0.001f; doaCfg.clutterRemovalFlag = (uint8_t) atoi (argv[4]); doaCfg.dopplerOversampleFactor = (uint8_t) atoi (argv[5]); doaCfg.useCFAR4DopDet = (uint8_t) atoi (argv[6]); doaCfg.dopCfarThr = (float) atoi (argv[7]) * 0.1f; doaCfg.dopCfarGuardLen = (uint8_t) atoi (argv[8]); doaCfg.scaleDopCfarOutCFAR = (uint8_t) atoi (argv[9]);", + "partNumber" : " IWR6843", + "allResponseList" : [ { + "contentId" : "3321547", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 4:01 PM", + "userId" : "5118664", + "content" : "Hi Toyota, I want to confirm that the issue you are seeing is different SNR at different locations in the scene. This can be caused by more than the signal chain. In a reflective environment, or an environment with many people, or other situations, you will have higher noise, which will result in a lower SNR. The doaCfg effects the Angle of Arrival function, and has a high memory impact when it is changed, so I don't recommend changing it at this time. Its parameters are specific to the antenna design. Regards, Justin" + }, { + "contentId" : "3321723", + "userName" : "Toyota-1", + "rankPoints" : "810", + "rankName" : "Intellectual", + "date" : "Apr 20, 2020 5:43 PM", + "userId" : "5242701", + "content" : "Dear Justin We are testing at outdoor . it no noise issue . We observe SNR impact this people counting tuning it's key issue for this application. (Very Very Hard to tuning at different environment ) EVB have average SNR map but can't meet customer spec now. , if SNR map is caused by antenna design this source code architecture will need adding calibration part for it we will try fully testing with freq and record total SNR map with people field test. . BR" + }, { + "contentId" : "3329031", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 3:33 PM", + "userId" : "5118664", + "content" : "Hi Toyota, I apologize for the late reply. Can you send me a picture of the antenna you are using? Regards, Justin" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR6843", "/support/sensors/f/1023/tags/code%2bComposer%2bstudio" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898480.json b/data/json/DLP/898480.json new file mode 100644 index 0000000000000000000000000000000000000000..ab01cdff2133177630a81306dbd7e62fd3c4b630 --- /dev/null +++ b/data/json/DLP/898480.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "898480", + "reporterName" : "Antonio Faggio", + "rankPoints" : "3705", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS62810-Q1: Power Good", + "rankName" : "Expert", + "replies" : " 5", + "views" : " 32", + "queryText" : "Part Number: TPS62810-Q1 Hi, I understand that the PG only responds to a variation of the voltage regulated downwards. Consequently, if the voltage rises in a worrying way, I could not know this by only monitoring the PG. Correct? I do see that the IC has UVP and also OVP Power Good so I might be wrong for the above? For example let's assume that the PGOOD is not monitored and therefore has no way of understanding if everything is in order. If an external entity forced the regulated voltage to a value greater or less than the nominal one, would the IC would continue to work as if nothing had happened or would switch off? Obviously, being protected from short circuit, the integrated will respond if the output is brought to ground. But for intermediate values or higher than the nominal one? Many Thanks, Antonio", + "partNumber" : " TPS62810-Q1", + "allResponseList" : [ { + "contentId" : "3322586", + "userName" : "Dorian Brillet de Cande", + "rankPoints" : "5365", + "rankName" : "Expert", + "date" : "Apr 21, 2020 9:44 AM", + "userId" : "5350960", + "content" : "Hello Antonio, As you can see with UVP and OVP, PG states the good regulation of the output voltage at the intended value if VOUT is between UVP and OVP window. PG is an indicator which in TPS62810-Q1 is providing a binary output state. If VOUT was regulated at intended value within UVP and OVP window, PG=VOUT (referring to schematic page 1 of D/S). Then if the voltage rises above OVP as you mentioned, PG=0 if voltage at feedback is reaching 110% (raising typical value) of VOUT. If an external entity forced the regulated voltage to a value greater or less than the nominal one. The TPS62810-Q1 would try to regulate the output, you would need to refer to the Current limit section (9.4.4 and 9.4.5 topic in Datasheet). Let me know if you have any further questions. Thanks a lot! Regards, Dorian" + }, { + "contentId" : "3322968", + "userName" : "Antonio Faggio", + "rankPoints" : "3705", + "rankName" : "Expert", + "date" : "Apr 21, 2020 2:45 PM", + "userId" : "4653985", + "content" : "Hi Dorian, Ok, thank you clear. The assumptions, however, were that pin was not monitored. Without relying on the PG signal, I seem to understand that in the event of \"external forcing\" (therefore of bad regulation) the IC continues to work trying to regulate the output. At that point, the only parameter we can rely on is the current, or rather the over-current protection system. In the event that the output is brought to GND, it is easy to guess that the protection takes over and we are all safe. It is more difficult to understand what would happen if the output were forced, let's say 130% of the nominal value. I know it is perhaps a stupid question because this is highly unlikely to happen, but perhaps not too much. Take for example the LM46002 (I guess it has similar logic) to generate the 5V for the USB HOST device. This voltage is brought to the outside through the connector and the PGOOD is not connected to the enable of the uC to prevent a problem on USB from turning off everything. Suppose someone connects 6V ... what would then happen here? Many Thanks, Antonio" + }, { + "contentId" : "3324141", + "userName" : "Dorian Brillet de Cande", + "rankPoints" : "5365", + "rankName" : "Expert", + "date" : "Apr 22, 2020 11:40 AM", + "userId" : "5350960", + "content" : "Hello Antonio, I would like to understand how this 130% of output voltage could happen, are you referring to someone forcing a voltage at the output? How would behave the TPS62810-Q1? The following App-Note is a good read on this question: /lit/an/slyt689/slyt689.pdf Your device should then be used in PFM to prevent Boost behavior at the input or use an additional diode. Was is the question you are asking here? Thank you, Dorian" + }, { + "contentId" : "3325636", + "userName" : "Antonio Faggio", + "rankPoints" : "3705", + "rankName" : "Expert", + "date" : "Apr 23, 2020 1:20 PM", + "userId" : "4653985", + "content" : "Hi Dorian, Thanks a lot for the answer. The suggested document is interesting. Your interpretation is correct. The question is \"what happens if someone forces the Vout beyond a certain threshold?\". More than the solution, I would like to understand what would happen to the IC in these conditions if kept in Forced PWM mode and in the absence of a diode. But I guess it's not easy to say. Many Thanks, Antonio" + }, { + "contentId" : "3326767", + "userName" : "Dorian Brillet de Cande", + "rankPoints" : "5365", + "rankName" : "Expert", + "date" : "Apr 24, 2020 7:35 AM", + "userId" : "5350960", + "content" : "Hello Antonio, I think this is answered in the same App Note (section 6. Prohibit the bosst mode of step-down converters), if you force Vout beyond a certain threshold with IC in FPWM. Then your IC can behave like a boost converter, which you want to avoid. Current might flow from output to input, and enable IC which will start to act like a boost converter as inductor would be at the input of that system. Does this answer your question? Thanks a lot! Regards, Dorian" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS62810_2D00_Q1", "/support/power-management/f/196/tags/short%2bcircuit", "/support/power-management/f/196/tags/power%2bgood", "/support/power-management/f/196/tags/Protecton" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898482.json b/data/json/DLP/898482.json new file mode 100644 index 0000000000000000000000000000000000000000..f7d20777a01db73d1b1be1e258180870c935f9ef --- /dev/null +++ b/data/json/DLP/898482.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "898482", + "reporterName" : "Feng bin Su", + "rankPoints" : "1505", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS65150: Abnormally spike at voffset of TPS65150 without load", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 15", + "queryText" : "Part Number: TPS65150 Hi team, My customer is using our TPS65150 and see an unpredictable behavior since no load condition. Please refer the below waveform and schematic. We found that there is a SPIKE with a waveform of about 11.41V on VOFFSET as below figure. This SPIKE occurred when VREST reached -14V. Is there any work around or any suggestions to prevent it. Currently, this The waveform is measured without load. Thanks.", + "partNumber" : " TPS65150", + "allResponseList" : [ { + "contentId" : "3321496", + "userName" : "Costin Cazana", + "rankPoints" : "4080", + "rankName" : "Expert", + "date" : "Apr 20, 2020 3:36 PM", + "userId" : "18391", + "content" : "Hello, I have notified our expert regarding this topic. Please expect a response by 4/24/20. Thanks, Costin" + }, { + "contentId" : "3324940", + "userName" : "Liaqat Khan", + "rankPoints" : "7780", + "rankName" : "Expert", + "date" : "Apr 22, 2020 10:05 PM", + "userId" : "291526", + "content" : "Hello Feng, Can you please measure current on the VOFFSET supply to see if there is a big current step? I suggest to remove C9815 and disconnect U9805 circuits from VRESET to see if these circuits are causing a big current step on VOFFSET. A big current step on OFFSET is the likely cause of the this spike so you can try to debug it further from this point of view. Kind Regards, Liaqat" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS65150" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898488.json b/data/json/DLP/898488.json new file mode 100644 index 0000000000000000000000000000000000000000..5ac7bf4b02b1e57d564fbe4d7a37cfafd620b5ef --- /dev/null +++ b/data/json/DLP/898488.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "898488", + "reporterName" : "Hans Georg Wolf", + "rankPoints" : "30", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS55340: Isolated Continuous Conduction Mode Flyback Using the TPS55340- SLVA559– January2013", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 21", + "queryText" : "Part Number: TPS55340 In SLVA559 a circuit with a TPS55340 for an isolated flyback is presented. It seems that the circuit (Figure1. Reference Design Schematic) was drawn with TINA. Is the TINA-TI Refernce design (TSC-file) available for download? Kind Regards Hans", + "partNumber" : " TPS55340", + "allResponseList" : [ { + "contentId" : "3321553", + "userName" : "Yinsong Cai1", + "rankPoints" : "950", + "rankName" : "Intellectual", + "date" : "Apr 20, 2020 4:07 PM", + "userId" : "6183682", + "content" : "Hi Hans, Thanks for your interest in TPS55340. I believe it is. Please check the model in /product/TPS55340/toolssoftware Thanks, Yinsong" + }, { + "contentId" : "3322650", + "userName" : "Hans Georg Wolf", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 11:06 AM", + "userId" : "5149905", + "content" : "Hi Yinsong, Thank you for your quick reply. Under the link i found the TINA transient model for the TSP55340 and a reference design for a boost converter. But i am looking for the reference design in figure 1 presented in SLVA559 for an isolated flyback. Is this flyback reference design available for TINA or webench power designer? Thanks in advance and kind regards Hans" + }, { + "contentId" : "3323007", + "userName" : "Yinsong Cai1", + "rankPoints" : "950", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 3:05 PM", + "userId" : "6183682", + "content" : "Hi Hans, Sorry I thought you just want a model for the flyback. Right now we only have boost reference design. But the transient model is good for simulation in flyback. Thanks, Yinsong" + }, { + "contentId" : "3324722", + "userName" : "Hans Georg Wolf", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 5:35 PM", + "userId" : "5149905", + "content" : "Hi Yinsong, Thank you for your response. Then I will try my luck with the transient model. Kind Regards Hans" + } ], + "tags" : [ "/support/power-management/f/196/tags/tina_2D00_ti", "/support/power-management/f/196/tags/TPS55340" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898494.json b/data/json/DLP/898494.json new file mode 100644 index 0000000000000000000000000000000000000000..86a7a6f4911a058b7e1598c81ab56129ff699d04 --- /dev/null +++ b/data/json/DLP/898494.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898494", + "reporterName" : "Troyson Li", + "rankPoints" : "2040", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS61089: How to improve the performance of load transient", + "rankName" : "Expert", + "replies" : " 3", + "views" : " 21", + "queryText" : "Part Number: TPS61089 Hicompany team , My customer used TPS61089 which comp circuit is the same as Typical Application in specfication. But they found the load transmit are not both quickly and good(Test conditons:0A@ 0.5ms ->2A @ 0.5ms) And there is a huge voltage-drop like the following picture. we will appreciate ifcompany can give some advice to improve performance of load transient.Thank you!", + "partNumber" : " TPS61089", + "allResponseList" : [ { + "contentId" : "3322311", + "userName" : "Helen chen", + "rankPoints" : "32965", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 5:26 AM", + "userId" : "4197150", + "content" : "Dear Sir, We need to know Vin, Vo and your current schematic." + }, { + "contentId" : "3322451", + "userName" : "Troyson Li", + "rankPoints" : "2040", + "rankName" : "Expert", + "date" : "Apr 21, 2020 7:28 AM", + "userId" : "5985182", + "content" : "Hi Helen , The VIn is 7.2V and the OUT is 12V/3A. The attachment is their sch. Thank you!" + }, { + "contentId" : "3322780", + "userName" : "Helen chen", + "rankPoints" : "32965", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 12:59 PM", + "userId" : "4197150", + "content" : "I found you use a 0.1uF VCC cap, please change it to 2.2uF/16V rating cap. 0.1uF is really too small. But this may not the root cause of the output voltage drop. You can increase the Rcomp=30k, ccomp=2.2nF for a double check, by the way, what is the output cap effective capacitance under 12VDC bias?" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS61089" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898496.json b/data/json/DLP/898496.json new file mode 100644 index 0000000000000000000000000000000000000000..0bf60c5831e6295818460720a94553e270f80d98 --- /dev/null +++ b/data/json/DLP/898496.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898496", + "reporterName" : "houdali nabil", + "rankPoints" : "10", + "resolutionStatus" : "", + "ticketName" : "TPS54531: Unencrypted TPS54531 model", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: TPS54531 Hellon I would like to simulate a design of TPS54531 on LTSPICE XVII, but it doesn't work. This error appears when I launch the simulation \"too few nodes\", probably that comming from the TPS54531 model. Do you have any idea? Thanks in advance Kind regards", + "partNumber" : " TPS54531", + "allResponseList" : [ { + "contentId" : "3322378", + "userName" : "Ryan Hu (BSR-MV)", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 6:28 AM", + "userId" : "4779079", + "content" : "Hi Houdali, You need unencrypted model for the simulation with LTSPICE XVII. But currently, the unencrypted model is not published for non-NDA customers. Sorry for the inconvenient." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS54531" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898501.json b/data/json/DLP/898501.json new file mode 100644 index 0000000000000000000000000000000000000000..0708584f656351c60007bf06df741e3970b5cb3a --- /dev/null +++ b/data/json/DLP/898501.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898501", + "reporterName" : "ReedKacz", + "rankPoints" : "1595", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS61023: Calculating Feedforward Cap", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 16", + "queryText" : "Part Number: TPS61023 Hi Team, When looking at the TPS61023 datasheet, there are two conditions for what frequency to select the Cff value to make a zero frequency (pasted below): For large output capacitance more than 40 μF application,company recommends a feedforward capacitor to set the zero frequency (fFFZ) to 1 kHz. As for the input voltage lower than 1-V application,company recommends to use the effective output capacitance is about 100 µF and set the zero frequency (fFFZ) to 1 kHz. Are both of these supposed to be 1kHz? When looking at the TPS61022 datasheet it has a similar statement but with two different frequencies, see below: For large output capacitance more than 40 μF application,company recommends a feedforward capacitor to set the zero frequency (fFFZ) to 2 kHz. As for the input voltage lower than 2-V application,company recommends setting the zero frequency (fFFZ) to 20 kHz when the effective output capacitance is less than 40 μF. Thank you! Reed", + "partNumber" : " TPS61023", + "allResponseList" : [ { + "contentId" : "3322159", + "userName" : "Zack Liu", + "rankPoints" : "12485", + "rankName" : "Genius", + "date" : "Apr 21, 2020 1:37 AM", + "userId" : "4961181", + "content" : "Hi ReedKacz, For the first conditions of large output capacitance more than 40uF, setting the zero at 1kHz and 2kHz are the same. For the second condition, in TPS61023 datasheet, it is low Vin and large Cout, so the datasheet recommends setting the zero to 1kHz. in TPS61022 datasheet, it is low Vin and low Cout, so the power stage pole 2/(2pi*Rout*Cout) is high, the zero frequency(fFFZ) doesn't need to be at 2kHZ. But if Cout is also large, I would suggest set the fFFZ at around 1~2kHz. You can use TPS61023 calculation tool to look at the bode plot: /product/TPS61023/toolssoftware" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS61023", "/support/power-management/f/196/tags/TPS61022" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898504.json b/data/json/DLP/898504.json new file mode 100644 index 0000000000000000000000000000000000000000..2ae2c38e0430aeff351d5470a9436c418c86e317 --- /dev/null +++ b/data/json/DLP/898504.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898504", + "reporterName" : "John Hamilton2", + "rankPoints" : "80", + "resolutionStatus" : "", + "ticketName" : "BQ76930: 9 cell pack - Last Cell in Pack over charges.", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: BQ76930 I have designed a 9 cell Battery Pack using the bq76930. It pretty much works except I am running across one problem. Cell 9 will charge faster (3 different battery packs). I can see the bleed resistor turn on (100 ohms) when it tries to balance and the cell 9 doesn't seem to care it just keeps charging. I tried 50 ohms too. This is the last cell in the pack and I know there are a few items that must be taken care of to make it work. I am using the EM as a design reference. I have removed the cap between VC9 and VC8 and replaced it with a 0 ohm resistor, I have removed R23 and R33, I have shorted C9 and C8 together and have cell 9 connected between C8 and C10. Most of the cells get to 3.35V to 3.36 and stop, but cell 9 will go up to 3.6 where the Micro will stop the charging. Am I just trying to over charge the cells? LiFePo3 A123 2665. Nominal is 3.3V Charging Voltage is 3.6.", + "partNumber" : " BQ76930", + "allResponseList" : [ { + "contentId" : "3321986", + "userName" : "Matt Sunna", + "rankPoints" : "24930", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 9:25 PM", + "userId" : "269312", + "content" : "Hi John, We haven't seen this specific issue before. Can you try moving the top cell to another position to see if the problem follows the cell? Just thinking through this, if the top input were damaged, it might report a low voltage causing the MCU to balance down the other cells causing the top to overcharge. However, the MCU is controlling the balancing and is seeing the higher voltage reading on this cell, right? It seems strange that cell 9 would be the only cell to overcharge since the charge current should go through all cells. Regards, Matt" + } ], + "tags" : [ "/support/power-management/f/196/tags/9%2bcells", "/support/power-management/f/196/tags/charging", "/support/power-management/f/196/tags/BQ76930" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898505.json b/data/json/DLP/898505.json new file mode 100644 index 0000000000000000000000000000000000000000..5de0f767f7afdb3bfbd979b8f2ad17935025ca8a --- /dev/null +++ b/data/json/DLP/898505.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898505", + "reporterName" : "Goekhan Kaya", + "rankPoints" : "40", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS61022: Higher Vin_min at higher loads?", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 16", + "queryText" : "Part Number: TPS61022 Hello, The PMP30528 suggests that Vout goes to zero when Vin is below 1.8V at 2A load (see 2.4.1 and 2.4.2 in test report of PMP30528). Is that a general behavior of the TPS61022? Regards", + "partNumber" : " TPS61022", + "allResponseList" : [ { + "contentId" : "3322166", + "userName" : "Zack Liu", + "rankPoints" : "12485", + "rankName" : "Genius", + "date" : "Apr 21, 2020 1:48 AM", + "userId" : "4961181", + "content" : "Hi Kaya, TPS61022 Vout should be at 3.9V when Vin is at around 1.8V because TPS61022 switch valley current limit is at least 6.5A. I'll contact this PMP designer to discuss this behavior. Thanks for reminding it." + } ], + "tags" : [ "/support/power-management/f/196/tags/PMP30528", "/support/power-management/f/196/tags/TPS61022" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898507.json b/data/json/DLP/898507.json new file mode 100644 index 0000000000000000000000000000000000000000..0a9eaad8841a4110a7f4646fa8b47c77dbdb89d6 --- /dev/null +++ b/data/json/DLP/898507.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "898507", + "reporterName" : "Jared Becker", + "rankPoints" : "7875", + "resolutionStatus" : "Resolved", + "ticketName" : "Competitive Device against PESD0402-140", + "rankName" : "Expert", + "replies" : " 2", + "views" : " 19", + "queryText" : "Hi Team, Is there a competitive device we have in our portfolio to compete with the PESD0402-140? Thanks, Jared", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3321950", + "userName" : "Andy Robles", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 20, 2020 8:51 PM", + "userId" : "6043129", + "content" : "Hi Jared, The PESD0402-140 is an ESD device with a working voltage of up to 14V. At that high voltage the only devices we have is our TVS family of devices. For bidirectional protection at a 14V range I would suggest the TVS1401. However, this device does have a much higher capacitance, which could be a problem if used in high speed data lines. What would be the application for this device? (i.e. voltage range, data speed) Best regards, Andy Robles" + }, { + "contentId" : "3323253", + "userName" : "Jared Becker", + "rankPoints" : "7875", + "rankName" : "Expert", + "date" : "Apr 21, 2020 6:03 PM", + "userId" : "4295103", + "content" : "Hello Andy, Thank you for the quick reply! I do not have those details readily available, but will let you know if I have further questions. Thanks! -Jared" + } ], + "tags" : [ ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898509.json b/data/json/DLP/898509.json new file mode 100644 index 0000000000000000000000000000000000000000..83e9e6cea5450b0f763660e99bb9f4527587ef87 --- /dev/null +++ b/data/json/DLP/898509.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "898509", + "reporterName" : "Jared Becker", + "rankPoints" : "7875", + "resolutionStatus" : "Resolved", + "ticketName" : "Competitive Device against PGB1010603NR", + "rankName" : "Expert", + "replies" : " 2", + "views" : " 18", + "queryText" : "Hi Team, Do we have a competitive device to compete against the PGB1010603NR? Thank you, Jared", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3321960", + "userName" : "Andy Robles", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 20, 2020 8:58 PM", + "userId" : "6043129", + "content" : "Hi Jared, The PGB1010603NR is an ESD device with a working voltage of up to 24V. At that high voltage the only devices we have is our TVS family of devices. For bidirectional protection at a 24V range I would suggest the TVS2701. However, this device does have a much higher capacitance, which could be a problem if used in high speed data lines. What would be the application for this device? (i.e. voltage range, data speed) Best regards, Andy Robles" + }, { + "contentId" : "3323255", + "userName" : "Jared Becker", + "rankPoints" : "7875", + "rankName" : "Expert", + "date" : "Apr 21, 2020 6:04 PM", + "userId" : "4295103", + "content" : "Hello Andy, Thank you for the quick reply! I do not have those details readily available, but will let you know if I have further questions. Thanks! -Jared" + } ], + "tags" : [ ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898512.json b/data/json/DLP/898512.json new file mode 100644 index 0000000000000000000000000000000000000000..448be614bd222144cb2b3b969bac0575c5b77131 --- /dev/null +++ b/data/json/DLP/898512.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "898512", + "reporterName" : "Ramachandran Sivanehru", + "rankPoints" : "75", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM5069: Reverse current during motor Regen", + "rankName" : "Prodigy", + "replies" : " 5", + "views" : " 21", + "queryText" : "Part Number: LM5069 Hi, I am going to use this device as the application note suggested, but the information is not clear about the reverse current. During the reverse current the source voltage go higher than the gate (or enough to turn off the MOSFET). So the reverse current will flow through the MOSFET body diode for a shorter period, until the drain voltage (Vin) equal (one diode drop less) to the source to turn on the MOSFET again. Does it going to cause any issues. Hot swap circuit in my application is situated between the motor and the load dump, the current flows in reverse direction when the motor in Regen mode. Thank you Siva", + "partNumber" : " LM5069", + "allResponseList" : [ { + "contentId" : "3321661", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 5:02 PM", + "userId" : "4743883", + "content" : "Hi Siva, If the LM5069 stays in enabled state, the external MOSFET remains in fully enhanced state and allows reverse current to flow from Source to the Drain. You have to make sure that the input is capable to absorb the energy (i.e., enough capacitance or supply having sinking capability). Let me know if it is not clear. Best Regards, Rakesh" + }, { + "contentId" : "3323130", + "userName" : "Ramachandran Sivanehru", + "rankPoints" : "75", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 4:11 PM", + "userId" : "6123230", + "content" : "Hi Rakesh, Thanks for the info. Yes we dump this energy using the load dump. How the MOSFET remains in conduction even the source voltage goes above the gate voltage. Do you mean as I have mentioned the body diode makes the Vin to go high, so keep the Vgs in biasing region. Regards Siva" + }, { + "contentId" : "3323775", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 4:41 AM", + "userId" : "4743883", + "content" : "Hi Siva, Under this condition, the drain voltage follows the source voltage (through body diode or though the MOSFET channel if the MOSFET is already in ON condition). The controller biases the GATE potential at Vin+12V always unless the controller sees OV, UV fault. You can use simulation tools to verify /product/LM5069/toolssoftware Best Regards, Rakesh" + }, { + "contentId" : "3323946", + "userName" : "Ramachandran Sivanehru", + "rankPoints" : "75", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 8:00 AM", + "userId" : "6123230", + "content" : "Hi Rakesh, Thanks for the info. Does these TINA models work in LTSpice. Regards Siva" + }, { + "contentId" : "3324098", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 10:48 AM", + "userId" : "4743883", + "content" : "Hi Siva, You can use unencrypted PSpice model in LTSpice. I have sent you private message. Please reach me for the same. Best Regards, Rakesh" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM5069" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898516.json b/data/json/DLP/898516.json new file mode 100644 index 0000000000000000000000000000000000000000..ae4b26e85bbbe49f782c5db665f9a972c4e2b32c --- /dev/null +++ b/data/json/DLP/898516.json @@ -0,0 +1,71 @@ +{ + "ticketNumber" : "898516", + "reporterName" : "Steve Widener", + "rankPoints" : "5545", + "resolutionStatus" : "", + "ticketName" : "TPS25982: Body diode current rating", + "rankName" : "Expert", + "replies" : " 7", + "views" : " 37", + "queryText" : "Part Number: TPS25982 What are the ratings (especially the peak current) for the intrinsic body diode from OUT to IN on this device? For instance, if there is a short applied to the input of the TPS25982, any charge on the output capacitors will discharge backwards through the part - possibly with a high peak current. Please advise the maximum current ratings for the body diode of the pass mosfet.", + "partNumber" : " TPS25982", + "allResponseList" : [ { + "contentId" : "3322299", + "userName" : "Praveen GD", + "rankPoints" : "9575", + "rankName" : "Genius", + "date" : "Apr 21, 2020 5:03 AM", + "userId" : "4421098", + "content" : "Hi Steve, We generally do not characterize the body diode of the internal FET as it is not intended to carry current. I need to check with our team internally to see if we have any data available for the body diode. Let me check and get back to you within a couple of days." + }, { + "contentId" : "3326892", + "userName" : "Praveen GD", + "rankPoints" : "9575", + "rankName" : "Genius", + "date" : "Apr 24, 2020 10:11 AM", + "userId" : "4421098", + "content" : "Hi Steve, I don't think there should be a problem in discharging the output capacitors to the input vis the body diode. There would be a problem if the current flowing the body diode is continuous. Are you looking at protecting the body diode only in this condition (input short and output cap discharging through body diode) or do you have any other scenario ?" + }, { + "contentId" : "3327015", + "userName" : "Steve Widener", + "rankPoints" : "5545", + "rankName" : "Expert", + "date" : "Apr 24, 2020 12:57 PM", + "userId" : "542370", + "content" : "Praveen - The primary concern is discharging the output cap when the input is shorted. This is for a critical design review so we need numeric guidance please." + }, { + "contentId" : "3327092", + "userName" : "Praveen GD", + "rankPoints" : "9575", + "rankName" : "Genius", + "date" : "Apr 24, 2020 2:05 PM", + "userId" : "4421098", + "content" : "Hi Steve, Can you share with us the following details, Output Capacitance Value Maximum Output/Input Voltage Minimum Impedance across input when input is short circuited" + }, { + "contentId" : "3328679", + "userName" : "Steve Widener", + "rankPoints" : "5545", + "rankName" : "Expert", + "date" : "Apr 27, 2020 12:22 PM", + "userId" : "542370", + "content" : "Output Capacitance Value = 338uF Maximum Output/Input Voltage = 13.8V Minimum Impedance across input when input is short circuited = 0" + }, { + "contentId" : "3328815", + "userName" : "Praveen GD", + "rankPoints" : "9575", + "rankName" : "Genius", + "date" : "Apr 27, 2020 1:45 PM", + "userId" : "4421098", + "content" : "Hi Steve, There should be absolutely no problem for TPS25982 in discharging 338 uF through its body diode. We have customers successfully using it for few mF's of capacitors." + }, { + "contentId" : "3328885", + "userName" : "Steve Widener", + "rankPoints" : "5545", + "rankName" : "Expert", + "date" : "Apr 27, 2020 2:24 PM", + "userId" : "542370", + "content" : "What is the basis for this? Where does the diode fail for instance (what peak current?) It's good to know that other customers have discharged a few mF but there isn't guidance on what the ESR of those caps where or what the shorting impedance is in those cases so we really can't say what margin is available before something fails. I did look up a typical NEXFET rated for similar voltages & rdson (CSD17575Q3) - the diode looks like ~ 0.4V + 13mOhms (roughly). If the TPS25982 had a similar internal body diode, the maximum peak current would be (13.8V - 0.4V)/13mOhms = 1000A. That seems like a lot and would likely not be seen due to inductances, cap ESR etc. but can we say that a 1000A pulse would not damage the part?" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS25982" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898520.json b/data/json/DLP/898520.json new file mode 100644 index 0000000000000000000000000000000000000000..401a46f933afe811d0c5629f3eb4e613dafcef55 --- /dev/null +++ b/data/json/DLP/898520.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898520", + "reporterName" : "Lindsey Fike", + "rankPoints" : "485", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS54308: Switching current to flow under the device", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: TPS54308 Hello! The datasheet says not to allow switching to flow under the device. Is this a suggestion or a hard rule? I have a customer that is far into their design that includes the switch node coming out from under the device, passing by the ground pin. I can send their layout privately if helpful. Thanks!", + "partNumber" : " TPS54308", + "allResponseList" : [ { + "contentId" : "3322136", + "userName" : "Ryan Hu (BSR-MV)", + "rankPoints" : "2730", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 1:12 AM", + "userId" : "4779079", + "content" : "Hi Lindsey, Generally speaking, the SW is not allowed to be routed under the IC. GND trace is ok. You can also follow the layout example of TPS56339EVM. This layout is better than the TPS54308." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS54308" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898527.json b/data/json/DLP/898527.json new file mode 100644 index 0000000000000000000000000000000000000000..4adb0f0331f6c92dbe0c1f4997e0d65012eb17b6 --- /dev/null +++ b/data/json/DLP/898527.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "898527", + "reporterName" : "Lutz Naumann", + "rankPoints" : "4925", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ34Z100-G1: Training material for the golden unit", + "rankName" : "Expert", + "replies" : " 4", + "views" : " 25", + "queryText" : "Part Number: BQ34Z100-G1 Dear team, our customer is developing his own battery pack based on 5S NiMH cells. The battery cell planned is VH1800AA. They selected BQ34Z100-G1 The customer told me they did not receive the chemistry files from the cell manufacturer and will have to create their own golden image file. (Or can we look up this type of battery in BQ Studio?) The customer is wondering if there was training material he could follow to do create the golden image. He would also want to have design reviewed. I do have the schematic and battery information under NDA but this needs to be done offline. How can we do this? Would BQ34Z100-G1 be the best part or should they move to BQ34110 or some other part? There will be a MCU in the pack as the customer has his own LED indication scheme - so no use of the LED feature of BQ34Z100-G1. many thanks Lutz", + "partNumber" : " BQ34Z100-G1", + "allResponseList" : [ { + "contentId" : "3321899", + "userName" : "Dominik Hartl11", + "rankPoints" : "35875", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 7:57 PM", + "userId" : "9849", + "content" : "Please use the instructions from /tool/GPCCHEM to find a ChemID. Make sure that the charge termination configuration is appropriate for NiMH cells (see TRM, 3.2.16 Charge Efficiency and 3.7 Charging and Charge Termination Indication). For a golden image, you must configure the ChemID, charge termination, system parameters (e.g. Terminate Voltage, load configuration, discharge/charge/quit thresholds) and then run a learning cycle: /how-perform-successful-learning-cycle-gauges" + }, { + "contentId" : "3322854", + "userName" : "Lutz Naumann", + "rankPoints" : "4925", + "rankName" : "Expert", + "date" : "Apr 21, 2020 1:35 PM", + "userId" : "471914", + "content" : "Thanks Dominik, this is very helpful. We will go a ahead an create try to create the golden image. Could you also comment on the question if BQ34Z100 is the better choice over BQ34110 or are both equal options? Also how could we check the customer's schematic offline. Should I just send it to you? thanks Lutz" + }, { + "contentId" : "3322977", + "userName" : "Dominik Hartl11", + "rankPoints" : "35875", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 2:51 PM", + "userId" : "9849", + "content" : "These two gauges use totally different gauging algorithms. It depends on the application which one is better. In general, the bq34z100 is likely to handle more applications over larger temperatures. The bq34110 is better suited for rarely discharged applications and has the ability to estimate cell deterioration even without full discharges." + }, { + "contentId" : "3323084", + "userName" : "Lutz Naumann", + "rankPoints" : "4925", + "rankName" : "Expert", + "date" : "Apr 21, 2020 3:41 PM", + "userId" : "471914", + "content" : "OK, I see, many thanks, I will discuss with the customer. Lutz" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ34110", "/support/power-management/f/196/tags/BQ34Z100_2D00_G1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898538.json b/data/json/DLP/898538.json new file mode 100644 index 0000000000000000000000000000000000000000..207d1cd2d70620a32bf4514fc07e9ec4420fb933 --- /dev/null +++ b/data/json/DLP/898538.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "898538", + "reporterName" : "SHH", + "rankPoints" : "23800", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "Asking for the power switch recommendation", + "rankName" : "Mastermind", + "replies" : " 5", + "views" : " 34", + "queryText" : "Hi Team, Customer is designing new project with power switch Would you please provide recommend the p2p solution to replace the following two parts? G517D1T11U G524B1T11U BR, SHH", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3322154", + "userName" : "Andy Robles", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 1:32 AM", + "userId" : "6043129", + "content" : "Hi SHH, Welcome to E2E! We do not have P2P solutions for these devices, but have some devices that offer similar functionality. The G517D1T11U and G524B1T11U are both devices with reverse current blocking and over current protection. These functionalities are offered in the TPS22948, but the TPS22948 can only handle 240mA typical. We also have the TPS22919 which offers short circuit protection, but does not have reverse current blocking. What are the key specs that the customer likes from these two devices? Best regards, Andy Robles" + }, { + "contentId" : "3322267", + "userName" : "SHH", + "rankPoints" : "23800", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 3:59 AM", + "userId" : "1862964", + "content" : "Hi Andy, thanks for feedback. customer design this in the USB port for OCP protection. BR, SHH" + }, { + "contentId" : "3324299", + "userName" : "Andy Robles", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 1:31 PM", + "userId" : "6043129", + "content" : "Hi SHH, I will be re-assigning the thread to a team I believe would have similar devices to the ones you mentioned. Someone will get back to you shortly. Best regards, Andy Robles" + }, { + "contentId" : "3325199", + "userName" : "Ziv Zhang", + "rankPoints" : "4685", + "rankName" : "Expert", + "date" : "Apr 23, 2020 4:14 AM", + "userId" : "5039499", + "content" : "Hi SHH, Please check TPS25221. For G524, can you help tell me the package? For TI's policy, I will first click resolved button. If you have any other concern, contact me any time. If you think resolved, please help click 'Issue is solved button'. Thanks." + }, { + "contentId" : "3325202", + "userName" : "Ziv Zhang", + "rankPoints" : "4685", + "rankName" : "Expert", + "date" : "Apr 23, 2020 4:21 AM", + "userId" : "5039499", + "content" : "Hi SHH, Also check TPS2065 and TPS2069. For TI's policy, I will first click resolved button. If you have any other concern, contact me any time. If you think resolved, please help click 'Issue is solved button'. Thanks." + } ], + "tags" : [ ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898540.json b/data/json/DLP/898540.json new file mode 100644 index 0000000000000000000000000000000000000000..1446c05ab4d0df9e2f0314790c7bd0ac35dfcbc4 --- /dev/null +++ b/data/json/DLP/898540.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898540", + "reporterName" : "Alpha H", + "rankPoints" : "10145", + "resolutionStatus" : "Resolved", + "ticketName" : "UCC38C44: SLUA274A app note questions", + "rankName" : "Genius", + "replies" : " 1", + "views" : " 16", + "queryText" : "Part Number: UCC38C44 Hi team, I had a few questions regarding the SLUA274A app note in relation to the UCC38C44. In section 2.5, under the equation for the snubber calulcation, equation 13 has a variable labeled \"T\". What does this refer to, turns ratio? Equations 12, 13, 14 for snubber calc are not the same as in SLUA086 pages 14 and 15. Both give similar capacitor and resistor values but very different resistor power dissipation. The difference between the 2 different equations is in SLUA274A the Rpri-clamp term divides into the entire rest of the equation while in SLUA086 it only divides into the last “V” = N(Vo+Vd) term. Can you tell me which equation is preferred? I appreciate the help! Thanks, AH", + "partNumber" : " UCC38C44", + "allResponseList" : [ { + "contentId" : "3322484", + "userName" : "Teng Feng", + "rankPoints" : "9390", + "rankName" : "Genius", + "date" : "Apr 21, 2020 7:57 AM", + "userId" : "5617595", + "content" : "Hi AH, T is the switching period. The equation 34 in SLUA086 is right. Regards, Teng" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC38C44" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898544.json b/data/json/DLP/898544.json new file mode 100644 index 0000000000000000000000000000000000000000..a9f9bdd0889721b94a90a70788542e2ca861657e --- /dev/null +++ b/data/json/DLP/898544.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898544", + "reporterName" : "Lauren Mayfield", + "rankPoints" : "2220", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ24780S: What is the minimum headroom required for this part? Is it a requirement to have 2V minimum voltage difference between the input and output?", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 10", + "queryText" : "Part Number: BQ24780S Our host has a 17V DC input for the built-in charger, which uses bq24780S. Currently, wehave a battery with 15V charging voltage. But what is we use a battery that has a higher charging voltage? We want to know the minimum headroom required for this part. The charging current is around 1.5A.", + "partNumber" : " BQ24780S", + "allResponseList" : [ { + "contentId" : "3322007", + "userName" : "Steve Preissig", + "rankPoints" : "4610", + "rankName" : "Expert", + "date" : "Apr 20, 2020 9:50 PM", + "userId" : "8914", + "content" : "Hi Lauren, Theoretically, as the battery voltage approaches the adapter voltage, the duty cycle approaches 100%. However, two things get in the way of this. Firstly, the conductive loss creates a voltage drop, so that whatever is your conductive loss voltage drop, that is the voltage differential where you would actually hit 100% duty cycle. Secondly,BQ24780s drives NFET switches using charge pump built with the BTST capacitor. Even if you try to drive at 100% duty cycle you won't quite get there because there is a forced refresh pulse on the BTST circuit. I can't really give you an exact cutoff for the device, because it is very dependent on external components. The BQ24780s does not have an enforced duty cycle cutoff, so you will see it switch right up to the point that it reaches that almost-100% duty cycle point. On the EVM at 800 kHz, this is generally around 0.8-1V for 2A. But keep in mind that as you approach this 0.8-1 V point, you will start to see increased ripple at the input. Around 1.3-1.5V the input ripple will start to increase and it will get worse and worse until you reach that 0.8 - 1.0V point. If you need a really tight dropout, I would recommend that you move to the BQ24800, which has options for 300kHz and 400 kHz switching. The lower switching frequencies give you a little more headroom (maybe 200 mV.) The BQ24800 also has some improvements to reduce the ripple at very high duty cycle. Since there isn't really a hard cut-off, I really think the best way to answer the question is to experiment with the EVM, keeping in mind that changing the external components may change the results slightly in the final system. Regards, Steve" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24780S" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898549.json b/data/json/DLP/898549.json new file mode 100644 index 0000000000000000000000000000000000000000..2e9c962c45c32a88efb1781fe4ebb759eaa877d3 --- /dev/null +++ b/data/json/DLP/898549.json @@ -0,0 +1,87 @@ +{ + "ticketNumber" : "898549", + "reporterName" : "Sarah Barnes", + "rankPoints" : "50", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ27542-G1: Tracking charge of a primary battery", + "rankName" : "Prodigy", + "replies" : " 9", + "views" : " 41", + "queryText" : "Part Number: BQ27542-G1 Hi, I have a primary battery (non-rechargeable) and would like to track how much charge has been used to calculate remaining battery capacity. What is the best way to do this with this particular fuel gauge? I have looked in depth at the data sheet and reference manual and do see that there are many available commands. Are there any commands that can provide the information I am looking for? Thank you", + "partNumber" : " BQ27542-G1", + "allResponseList" : [ { + "contentId" : "3321886", + "userName" : "Dominik Hartl11", + "rankPoints" : "35875", + "rankName" : "Mastermind", + "date" : "Apr 20, 2020 7:50 PM", + "userId" : "9849", + "content" : "The bq27542 is intended for rechargeable batteries. There is no direct way to read the coulomb count from the bq27542. There's PassedCharge() but this will be cleared during relax and the gauge can adjust this not just by coulomb count but also when it tries to measure cell impedance and needs to correct the coulomb count.company has the bq35100 for primary cells. This one uses a coulomb counter to determine remaining capacity." + }, { + "contentId" : "3323347", + "userName" : "Sarah Barnes", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 7:20 PM", + "userId" : "6328685", + "content" : "Thank you for your response. I appreciate the feedback. The BQ27542-G1 Fuel Gauge was selected in the early design process and has already been implemented in circuitry. Due to budget concerns, we are hoping to not have to make a design change by replacing the BQ27542 with the BQ35100, which would require ordering new boards. Is there anyway to get a measurement that would be close to what we are looking for? You mentioned using the PassedCharge() command as a potential option. Our previous approach was going to be to read the NomAvailableCapacity() with the assumption that this is relative to the design capacity stored in Flash. We are willing to make the change to the BQ35100 if there are absolutely no other options, but we are looking to explore any options that might be available with the BQ27542 first." + }, { + "contentId" : "3323371", + "userName" : "Dominik Hartl11", + "rankPoints" : "35875", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 7:36 PM", + "userId" : "9849", + "content" : "If the OCV curve (OCV vs. depth of discharge) is steep enough that the gauge can take accurate DOD vs. OCV lookup for your primary cell, then the impedance tracking gauge may still give you good results. If the OCV vs. DOD curve is flat then it's probably futile to try to make this gauge work well. One work-around would be to use PassedCharge() as a coulomb count information source and disregard all other gauging information from the gauge. On your uC, add code that detects if PassedCharge was reset (or the absolute value dropped) and accumulate the true coulomb count since start of use of the primary cell. You'd have to catch the point when the gauge sets PassedCharge to 0 to make this reliable. Passed Charge = 10, 20, 30, 40, 0, 5, 6, 17... Accumulated charge = 10, 20, 30, 40, 45, 46, 57... With this you'd effectively reduce the gauge to a coulomb counter." + }, { + "contentId" : "3324594", + "userName" : "Sarah Barnes", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 4:08 PM", + "userId" : "6328685", + "content" : "A few questions: 1. Our OCV curve is flat. Are you saying that the PassedCharge() could be a work around either way, steep OCV curve or flat? Or would this work around only be applicable if our OCV curve were steep? 2. For PassedCharge(), you mentioned that is cleared during relax. Is there a way to force reset of PassedCharge() so that it happens at a known time? 3. Also, is there a way to know when cell impedance is being measured or to prevent it from being measured at all? 4 Going back to the NomAvailableCapacity() command. What are the specific concerns with using this approach? Could you provide more detail on why this would or wouldn't work? 5. Another concern we have is that the maximum value of Design Capacity that can be stored according to the datasheet is 14,500 mAh, while our selected battery has a capacity of 19,000 mAh. What impact would this have, if any, on the available measurements? Thank you" + }, { + "contentId" : "3324691", + "userName" : "Dominik Hartl11", + "rankPoints" : "35875", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 5:12 PM", + "userId" : "9849", + "content" : "#1: If the OCV curve is flat then trying to shoehorn the IT algorithm is not going to work. This algorithm doesn't just use coulomb count but discharge simulations that depend on depth of discharge calculations which rely on OCV measurements and an OCV curve that is steep enough for the voltage measurement accuracy of the gauge hardware. If you are able to write your driver to accumulate the passed charge (which the IT algorithm will reset to 0 during relax if cell voltage is not drifting) then you can use the total accumulated passed charge in your driver to estimate how much is left in your primary cell. You would effectively only use the coulomb counter of the gauge and ignore all other gauging results (like RM, FCC, SOC etc - none of these will return accurate values for your primary cell). This is independent from OCV curve shape. #2: Yes, issue IT_ENABLE. This will restart the gauging process and should reset the passed charge. #3: Cell impedance won't be measured until the gauge measured QMax. The gauge indicates Ra learning in Update Status and with bit RUPDIS #4: The IT algorithm won't work with a primary cell that has a flat OCV because every time the cell relaxes long enough, the algorithm will calculate DOD based on OCV and if that is flat, the gauge will have a large DOD error which will affect all capacity simulations. So all you can do with a cell like that is move to a gauge that was developed for a primary cell or use the coulomb counter approach / workaround as described in this thread. Nominal Available Capacity still relies on accurate DOD. #5: As you effectively have to discard the IT algorithm and only use the coulomb counter via PassedCharge(), DesignCapacity won't matter. You really can't use the gauging algorithm for this type of cell - the meaningful gauge info for this type of cell is current, voltage, temperature and passed charge. All other Impedance Tracking data is meaningless for a primary cell with flat OCV." + }, { + "contentId" : "3324791", + "userName" : "Sarah Barnes", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 6:33 PM", + "userId" : "6328685", + "content" : "Thank you. Yes, we have the capability to write our own driver to track the passed charge. Would it be possible to get valid PassedCharge() readings without ever enabling the IT algorithm? That way QEN would not be set, and in turn QMax would never be updated?" + }, { + "contentId" : "3327603", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 24, 2020 9:57 PM", + "userId" : "3528441", + "content" : "Hello Sarah, I think this has been tried before. You may want to test this on an EVM. I don't know if there's a global 5 hour reset time for the gauge even without QEN. When Dominik gets back next week, I'll check with him on this." + }, { + "contentId" : "3329370", + "userName" : "Sarah Barnes", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 7:07 PM", + "userId" : "6328685", + "content" : "Thank you, please let me know any additional information you find out" + }, { + "contentId" : "3329700", + "userName" : "Dominik Hartl11", + "rankPoints" : "35875", + "rankName" : "Mastermind", + "date" : "Apr 28, 2020 1:07 AM", + "userId" : "9849", + "content" : "The QMax timer will expire after 5 hours in relax regardless of IT_ENABLE status. You'll have to write code on the host controller / driver to accumulate all passed charge. The gauge will eventually reset the passed charge counter based on relax conditions / timing." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ27542_2D00_G1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898550.json b/data/json/DLP/898550.json new file mode 100644 index 0000000000000000000000000000000000000000..310f7878084fcde6c613d3b6b74240c09645200e --- /dev/null +++ b/data/json/DLP/898550.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "898550", + "reporterName" : "Isaac Parsons", + "rankPoints" : "450", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ24650: intermittent charging", + "rankName" : "Intellectual", + "replies" : " 5", + "views" : " 19", + "queryText" : "Part Number: BQ24650 Hi there, I'm working on a charger for one of our products and I'm having issues with the BQ24650. The input to this device is a 9V wall wart going into VIN, instead of a solar panel output. the mosfets I am using are NVTFS5C471NLWFTAG and the inductor is ETQ-P8M4R7JFA The battery is a CAM72F (https://www.evwest.com/catalog/product_info.php?products_id=301) For MPPSET I did not populate R7 and used a 10k resistor for R3, so MPPSET should be pulled up to 9V and thus will always be on, correct? When I attempt to charge the battery, the device works intermittently. I.e. it charges for 5 seconds and then turns off for 5 seconds. When I put an oscilliscope at the input I notice that its very noisy and rises slowly until it turns off, so I assume that its reaching the overvoltage cut off value. I'm just not sure why this would be happening, so any help would be greatly appreciated Also, I replaced the 10k NTC at R4 for a fixed resistor that sets the voltage within the range specified in the datasheet, so I dont believe its anything temperature related. Thanks", + "partNumber" : " BQ24650", + "allResponseList" : [ { + "contentId" : "3321891", + "userName" : "Kedar Manishankar", + "rankPoints" : "9290", + "rankName" : "Genius", + "date" : "Apr 20, 2020 7:54 PM", + "userId" : "4996925", + "content" : "Hi Isaac, MPPSET is the setpoint at which the charger will enter its input voltage regulation loop. When using solar panels you are meant to set it at 80% of OCV so that the input voltage gets regulated at the point, which usually corresponds to the maximum power point. Not meant to be set at your input voltage." + }, { + "contentId" : "3321898", + "userName" : "Isaac Parsons", + "rankPoints" : "450", + "rankName" : "Intellectual", + "date" : "Apr 20, 2020 7:57 PM", + "userId" : "5812259", + "content" : "But since Im not using solar panels, does it matter? Do I still need to set it at 80% of the maximum input voltage?" + }, { + "contentId" : "3321907", + "userName" : "Kedar Manishankar", + "rankPoints" : "9290", + "rankName" : "Genius", + "date" : "Apr 20, 2020 8:06 PM", + "userId" : "4996925", + "content" : "When you enter the input voltage regulation loop, the charge current will be decreased to maintain the input voltage at that point. When you have input current it will cause a small voltage drop (cables from supply to board/EVM, trace impedance) before being sensed by the IC at VCC, which means that odds are you aren't sourcing exactly 9V on VCC of the IC. So if you have your setpoint at your input voltage, the charger will keep trying to regulate the input current to reduce the voltage drop so that the MPPSET voltage is maintained. The solar panel is an example of how MPPSET/input voltage regulation is meant to be used, and not that this feature is only meant to be used with solar panels. A sanity check would be to check STAT1 STAT2 status when you see that there is no charging. If STAT1 is lit, the just change the MPPSET threshold lower, as this is indicating charge in progress and that there is no fault, meaning you are most likely entering and exiting the MPPSET loop cyclically. If neither STAT1 or STAT2 are lit, then there is a fault condition and it will change my assumption." + }, { + "contentId" : "3321912", + "userName" : "Isaac Parsons", + "rankPoints" : "450", + "rankName" : "Intellectual", + "date" : "Apr 20, 2020 8:10 PM", + "userId" : "5812259", + "content" : "Just tried it and neither are lit" + }, { + "contentId" : "3321915", + "userName" : "Kedar Manishankar", + "rankPoints" : "9290", + "rankName" : "Genius", + "date" : "Apr 20, 2020 8:16 PM", + "userId" : "4996925", + "content" : "Please capture VCC, SRN, STAT1 and PH on a waveform and capture the intermittent charging. As we are entering a fault condition this will give us more information." + } ], + "tags" : [ "/support/power-management/f/196/tags/bq24650" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898551.json b/data/json/DLP/898551.json new file mode 100644 index 0000000000000000000000000000000000000000..13d5104d73e1a05f491169b5b0d80195698c3b13 --- /dev/null +++ b/data/json/DLP/898551.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "898551", + "reporterName" : "Ryan McGarty", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "IWR6843ISK: 68XX Long Range People Detection - What is the visualizer used in the Overview?", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 31", + "queryText" : "Part Number: IWR6843ISK The 68XX Long Range People Detection lab runs fine, and we get a 3d plot from the visualizer tool when setup per the user guide, however what we would like to see is the output as shown in the Overview section of the userguide. This appears to show a realtime pointcloud output along with a cumulative point cloud output and gating / association data... what visualizer is this that is being displayed?", + "partNumber" : " IWR6843ISK", + "allResponseList" : [ { + "contentId" : "3322989", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 2:56 PM", + "userId" : "5118664", + "content" : "Hi Ryan, Unfortunately, this visualizer does not work with real time data. The data output format of the device is described in the user's guide, you can use that to add a cumulative plot to the gui. Regards, Justin" + }, { + "contentId" : "3323040", + "userName" : "Akash Gondalia", + "rankPoints" : "39385", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 3:23 PM", + "userId" : "4768107", + "content" : "Hi Ryan, Is this the GUI you are asking about? Let me look into this. Regards, AG" + }, { + "contentId" : "3323090", + "userName" : "Ryan McGarty", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 3:45 PM", + "userId" : "3618510", + "content" : "Yes, this is the visualizer I'm looking for" + }, { + "contentId" : "3327254", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 3:58 PM", + "userId" : "5118664", + "content" : "Hi Ryan, We have a similar visualizer included in the older toolboxes - see toolbox 3.6.2. You will still have to add a cumulative point cloud. Regards, Justin" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR6843ISK" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898562.json b/data/json/DLP/898562.json new file mode 100644 index 0000000000000000000000000000000000000000..5f590599a94b6789cef5142f8e4da423a02633ac --- /dev/null +++ b/data/json/DLP/898562.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898562", + "reporterName" : "Carlo Cabaccan", + "rankPoints" : "2530", + "resolutionStatus" : "", + "ticketName" : "TPS3808-EP: Coefficient of thermal expansion (CTE)", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 10", + "queryText" : "Part Number: TPS3808-EP Hi team, Good day. What is the CTE of the following devices? TPS3808G01MDBVTEP TPS386000RGP Regards, Carlo", + "partNumber" : " TPS3808-EP", + "allResponseList" : [ { + "contentId" : "3321998", + "userName" : "Michael_DeSando", + "rankPoints" : "12320", + "rankName" : "Genius", + "date" : "Apr 20, 2020 9:43 PM", + "userId" : "3482499", + "content" : "Hi Carlo, We are working with our package team to gather this information. I will update you once we have an answer. Thank you for your patience." + } ], + "tags" : [ "/support/power-management/f/196/tags/tps3808_2D00_ep" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898565.json b/data/json/DLP/898565.json new file mode 100644 index 0000000000000000000000000000000000000000..65c018fa90063663ab1bbc3bbcaa7504328fb274 --- /dev/null +++ b/data/json/DLP/898565.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "898565", + "reporterName" : "Talon Forman", + "rankPoints" : "20", + "resolutionStatus" : "Resolved", + "ticketName" : "CSD86360Q5D: Recommended Driver IC", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 12", + "queryText" : "Part Number: CSD86360Q5D Hello, In the recommended applications there is a driver IC shown next to the CSD86360Q5D. Doescompany have a device that fits this roll that can be powered by a 3.3V PWM signal? The reference design has uses the TPS40322. However the application has us using a particular Infineon controller, as the load is an AMD SVI2 based processor. The controller outputs a 3.3V PWM signal that our \"Driver IC\" would convert to the upper and lower gate controls. Essentially the sample TPS40322 device is too complex and we need a simpler gate-driver circuit, an 8-pin device like what is shown in the datasheet would be excellent. Thanks, Talon", + "partNumber" : " CSD86360Q5D", + "allResponseList" : [ { + "contentId" : "3321947", + "userName" : "John Wallace1", + "rankPoints" : "9460", + "rankName" : "Genius", + "date" : "Apr 20, 2020 8:48 PM", + "userId" : "3502056", + "content" : "Hi Talon, Thanks for the inquiry. I'm am the applications engineer forcompany discrete FETs and power blocks (like the CSD86360Q5D). I am going to have to redirect this to the appropriate product line. Are you looking for a gate driver IC such as the TPS51604 or a PWM controller with integrated gate drivers? I'm assuming your application is a synchronous buck converter. Is it a single phase or multiphase converter? These questions will help me determine the appropriate product line to send your inquiry." + }, { + "contentId" : "3321962", + "userName" : "Talon Forman", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 20, 2020 9:01 PM", + "userId" : "6223004", + "content" : "Thanks for the quick response John, it is for a synchronous buck converter. We are stepping down a 12V input to our card down to a SVI2 controlled 0.7V-0.9V. Our plan is to use two of these in dual phase to power the main rail, and another to power a secondary VDDCI rail. Normally we would use a uModule for something like this, but the AMD processor we are powering uses a proprietary interface, SVI2. The controller, the IR3567B, takes in the SVI2 bus signals (similar to an IIC bus), and outputs several PWM signals that can be used by gate driver ICs to switch the FETs. It also has current and voltage sense inputs so that it can properly control the voltages. So we have two of the three parts identified for the system, the controller (IR3567), the FETs (CSD86360Q5D), and need the intermediate gate driver IC that can convert our PWM signals to the corresponding high and low side gate controls. The TPS51604 looks promising, thank you for that recommendation." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS40322", "/support/power-management/f/196/tags/gate", "/support/power-management/f/196/tags/PWM", "/support/power-management/f/196/tags/Driver", "/support/power-management/f/196/tags/IC", "/support/power-management/f/196/tags/CSD86360Q5D", "/support/power-management/f/196/tags/Gate_2D00_Driver", "/support/power-management/f/196/tags/SVI2", "/support/power-management/f/196/tags/Controller" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898568.json b/data/json/DLP/898568.json new file mode 100644 index 0000000000000000000000000000000000000000..e9c9e9217ebd2fc50eeb6f18db26319084f65513 --- /dev/null +++ b/data/json/DLP/898568.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898568", + "reporterName" : "Rubeena Parveez", + "rankPoints" : "200", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ76PL455EVM: Cell Balancing commands", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 22", + "queryText" : "Part Number: BQ76PL455EVM Hi, I am controlling the BQ76PL455A-Q1 EVM through the TMS320F28379D launch pad. I am trying to performing balancing by sending balancing commands to the required cells(Similar to GUI - Balancing enable for those cells that need balancing). I using Simulink to control the EVM via the launchpad. The software reference design does not have any examples for passive balancing commands as it dies for other scenarios. Can you please share some documents/commands that I can you for balancing each cell individually?", + "partNumber" : " BQ76PL455EVM", + "allResponseList" : [ { + "contentId" : "3322471", + "userName" : "Andy Li55", + "rankPoints" : "2320", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 7:44 AM", + "userId" : "5768349", + "content" : "Hello User, If you can successfully use GUI to enable cell balancing on EVM, then it should be the problem of your source code. Please refer to section 7.3.7 Passive Balancing. The squeeze (OWD) function must be disabled for correct balancing operation by setting TSTCONFIG[EQ_SQUEEZE_EN] = 0. If CBCONFIG[BAL_CONTINUE] is set to '0', then when there is a FAULT the bq76PL455A disables balancing. The CBENBL register bits clear to indicate this event. BAL_CONTINUE = 0: CBENBL is set to 0 and balancing is disabled until the fault and fault status bits are cleared. Information about what was being balanced is discarded. No change is made to the BAL_TIME bits in CBCONFIG. The CBENBL register must then be rewritten with the desired balancing action. BAL_CONTINUE = 1: There is no effect on CBENBL and CBCONFIG and any balancing in progress continues. Thanks! Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/passive%2bcell%2bbalancing", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2bLaunchPad", "/support/power-management/f/196/tags/BQ76PL455A_2D00_Q1", "/support/power-management/f/196/tags/BQ76PL455EVM", "/support/power-management/f/196/tags/TMS320F28379D" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898579.json b/data/json/DLP/898579.json new file mode 100644 index 0000000000000000000000000000000000000000..a53d39004bc0e277eab6acaec82196940062deda --- /dev/null +++ b/data/json/DLP/898579.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898579", + "reporterName" : "Mitchell", + "rankPoints" : "3755", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS6594-Q1: Linux Driver", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: TPS6594-Q1 Hi Team, This might be a stretch but my customer is looking for an associated firmware driver for the TPS6594-Q1 that they can run on Linux / RTOS style. Is this something we have? Thanks, Mitchell", + "partNumber" : " TPS6594-Q1", + "allResponseList" : [ { + "contentId" : "3322805", + "userName" : "Chris Sterzik", + "rankPoints" : "38920", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 1:08 PM", + "userId" : "14446", + "content" : "Mitchell, This is under development and not currently available. Regards, Chris" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS6594_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898582.json b/data/json/DLP/898582.json new file mode 100644 index 0000000000000000000000000000000000000000..f89b0d493a4b37cecddbd943da74ffe133b77989 --- /dev/null +++ b/data/json/DLP/898582.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898582", + "reporterName" : "Stephanie Fung", + "rankPoints" : "10", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "PID UV Krypton Bulb High Voltage Power Supply", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 26", + "queryText" : "I am designing a flyback topology supply to power a PID UV krypton bulb. The supply is designed to ramp up to 1400VDC for bulb ignition, and then lowers the voltage (~700VDC) to become current controlled (0.5mA). I have attached a spec sheet for similar bulbs for reference, ours is most similar to the PKS 106. This is very similar to powering CCFL but DC is required rather than AC. Could you comment on whether there is a better suited topology and also recommendcompany parts that might be suitable for this design? I have a design in progress with an ADI part, but am running into trouble with flyback transformer specs. Thank you, Stephanieheraeus_pid_lamps.pdf", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3322522", + "userName" : "Teng Feng", + "rankPoints" : "9390", + "rankName" : "Genius", + "date" : "Apr 21, 2020 8:55 AM", + "userId" : "5617595", + "content" : "Hi Stephanie, Sorry we don't have the related devices and designs for this application area. I am not familiar with this Photoionisation Detector Lamps, if you can provide the detail spec, the topology, or a ready released design solution, maybe then I can recommend a device. Regards, Teng" + } ], + "tags" : [ ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898591.json b/data/json/DLP/898591.json new file mode 100644 index 0000000000000000000000000000000000000000..ef5c49b543f53e1a2e112a27d669101451db4e5a --- /dev/null +++ b/data/json/DLP/898591.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898591", + "reporterName" : "Zoubida AZAIZIA", + "rankPoints" : "90", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM3880", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 20", + "queryText" : "Hi, I want to insert a voltage divider at the EN validation input of the LM3880 sequencer. To do this, I need the maximum value of the resistances of the divider? This was not mentioned in its datasheet. Thanks.", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3323420", + "userName" : "yihe", + "rankPoints" : "23920", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 8:20 PM", + "userId" : "303879", + "content" : "Hi There is 7uA current source at EN pin, please consider this when sizing the resistor Vccenable=1.22V[1+(Ren1/Ren2)] - 7uARen1 Regards Yihe" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM3880" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898599.json b/data/json/DLP/898599.json new file mode 100644 index 0000000000000000000000000000000000000000..2945c7b7e1c930a7a5e55e5c08de94da29866fa5 --- /dev/null +++ b/data/json/DLP/898599.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898599", + "reporterName" : "user777540", + "rankPoints" : "550", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ25898D: About AUTO_DPDM function", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 11", + "queryText" : "Part Number: BQ25898D hello, An interrupt is output by USB / adapter source identified. Interrupts are output due to various factors. Where does USB / adapter source identified mean which register should be checked? If I check with VBUS Status register, how should I distinguish the result detected in the past from the result detected by AUTO_DPDM function? best regards", + "partNumber" : " BQ25898D", + "allResponseList" : [ { + "contentId" : "3322269", + "userName" : "Ning T", + "rankPoints" : "15365", + "rankName" : "Genius", + "date" : "Apr 21, 2020 4:04 AM", + "userId" : "145100", + "content" : "Hi, Referring to 9.2.3.3 Input Source Type Detection on the d/s, After input source type detection, an INT pulse is asserted to the host. In addition, the following registers and pin are changed: 1. Input Current Limit (IINLIM) register is changed to set current limit 2. PG_STAT bit is set 3. PG pin goes low (bq25898) When AUTO_DPDM_EN is disabled, the Input Source Type Detection is bypassed. The Input Current Limit (IINLIM) register, VBUS_STAT, and SPD_STAT bits are unchanged from previous values. Thanks, Ning." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25898D" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898601.json b/data/json/DLP/898601.json new file mode 100644 index 0000000000000000000000000000000000000000..a21bc81ed9d27c2e02dda873a96cb11de0f38b5a --- /dev/null +++ b/data/json/DLP/898601.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898601", + "reporterName" : "Stanley Dai", + "rankPoints" : "180", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM5116: Forward Crossing Phenomenon in Bolt Plot", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 12", + "queryText" : "Part Number: LM5116 Hi Team, Can you please make comments for below questions? Below is the screenshot of bode plot from customer side. The system working condition is: Vin= 58V, Vout=48V, Iout<=0.2A. Customer found there is forward crossing, which is abnormal and unfamiliar for them. Do you think this abnormal forward crossing indicates system is instable or not, and why? If yes, are there something customer can do to improve system stability? B&R Stanley", + "partNumber" : " LM5116", + "allResponseList" : [ { + "contentId" : "3322226", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 21, 2020 2:55 AM", + "userId" : "3498075", + "content" : "Hi Stanley, Do you mean the forward cross at about 80KHz? What's switching freq of LM5116? normally only need to scan freq range below Fsw /2. is it working at Fully Sync mode? LM5116 is controller, circuit may works at DCM mode if load <0.2A. customer need to test loop response at CCM mode. B R Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM5116" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898619.json b/data/json/DLP/898619.json new file mode 100644 index 0000000000000000000000000000000000000000..e5964751268690120a5fbc7387cabaf11058068d --- /dev/null +++ b/data/json/DLP/898619.json @@ -0,0 +1,71 @@ +{ + "ticketNumber" : "898619", + "reporterName" : "Harikrishnan Srinivasa pillai", + "rankPoints" : "70", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ25898: BQ25898", + "rankName" : "Prodigy", + "replies" : " 7", + "views" : " 37", + "queryText" : "Part Number: BQ25898 Hi, I am trying to validate the charger Bq25898 used in one of our design. This device is connected to BMS tool through I2C interface of 1.8V logic. After the connection checked the Device ACK is OKAY from BMS tool. The EV2400 emulator was connected. During the device selection I have chosen \"bq25898.bqz\" file. But in the window it shows as \"bq24298 Default view\" Not sure whether its still okay. When I read the register values its reading only the default values, not seeing any appropriate load current values. I have the following questions., 1. Does EV2400 supports \"Bq25898\" device ? 2. When load the charger configuration for \"bq25898\" why it shoes as\"bq24298 default view\" although on top it still shows as \"Bq25898.bqz\" 3. Why the register read values are not appropriate or not updating according to my input charger current or output load current increases? 4. I am looking for the following registers, can you please let me know the exact register number to read them? a: Input charge current register b. Output discharge current register. c. Charge current regulation. Thanks, Harikrishnan", + "partNumber" : " BQ25898", + "allResponseList" : [ { + "contentId" : "3323031", + "userName" : "Jeff F", + "rankPoints" : "88360", + "rankName" : "Guru", + "date" : "Apr 21, 2020 3:22 PM", + "userId" : "8433", + "content" : "Hi Harikrishnan, The EV2400 I2C output lines are internally pulled up to 3.3V I have never tested with two different voltage level pull ups on the I2C lines. Regarding 1 and 2, the BQ24298 tab headers are a typo. The BQ25898.bqz supports the device. Regarding 3, if you select Field View (far right) and then click Read Register and not have Device ACK Error as below, the registers should update. Regarding 4, input current register is REG00, charge current register is REG04, control of output discharge current is not an IC feature. There is an over discharge current clamp that has a fixed value. If you use Field View, you do not need to know the register numbers. Regards, Jeff" + }, { + "contentId" : "3323227", + "userName" : "Harikrishnan Srinivasa pillai", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 5:38 PM", + "userId" : "6321028", + "content" : "Hi Jeff, I had gone through the schematics of EV2400 emulator. As per the design, it supports all the I2C logic level. Because the design can be I2C specification compatible like 1.8V/2.5V/3.3V. Since I2C is open-drain based specification, so the designer has a choice of connecting the pull-up with any of these logic levels. I had checked the reference design of EV2400 as well and its logic is defined based the logic level read from the SDA and SCL lines from the DUT. You may be double confirm from your end. My DUT interface is currently connected to 1.8V. So in my understanding that should not be a problem. I have also able see \"DEVICE ACK OKAY\" when i connect the EV2400 with my DUT. My concern is why the register values are not getting updated when I read from the register? Thanks, Harikrishnan" + }, { + "contentId" : "3324732", + "userName" : "Harikrishnan Srinivasa pillai", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 5:39 PM", + "userId" : "6321028", + "content" : "Hi Jeff, In addition, I have also probed the SDA and SCL signal after connecting the EV2400 and found that signal quality is fine and it stays at 1.8V logic level. There is no logic conflict. The device address is also fine for this device. Please let me know your thoughts. Thanks, Harikrishnan" + }, { + "contentId" : "3324737", + "userName" : "Jeff F", + "rankPoints" : "88360", + "rankName" : "Guru", + "date" : "Apr 22, 2020 5:42 PM", + "userId" : "8433", + "content" : "Harikrishnan, did you disable the watchdog timer? If not, the registers reset to defaults after the timer expires. Jeff" + }, { + "contentId" : "3324742", + "userName" : "Harikrishnan Srinivasa pillai", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 5:47 PM", + "userId" : "6321028", + "content" : "Hi Jeff, Can you please let me know more on this watchdog timer? Do you mean there is some option from BMS tool to disable the watchdog timer of bq25898? I am not sure if there is a watchdog timer exist on this device. Please elaborate. Thanks, Harikrishnan" + }, { + "contentId" : "3324749", + "userName" : "Jeff F", + "rankPoints" : "88360", + "rankName" : "Guru", + "date" : "Apr 22, 2020 5:56 PM", + "userId" : "8433", + "content" : "Harikrishnan, All of our chargers have a watchdog timer bit (REG03b6) that the host must write to before it expires. If not the registers reset to default as a safety feature. You can change the timer expiration time or disable using REG07b4:5. Regards, Jeff" + }, { + "contentId" : "3324765", + "userName" : "Harikrishnan Srinivasa pillai", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 6:06 PM", + "userId" : "6321028", + "content" : "Hi Jeff, Thank you for the register details. I need to check on this from my Firmware team on the watchdog register value. On the quick check even if the watchdog timer was not disabled it should reflect the current value for 40 Sec (default timer). Which is huge time for human to see the values getting changed and reset to default value after 40 sec. But in my case the values are not getting updated at all. It stays some default value irrespective of the input current change or the Load current change. I am not able to attach the screen shot of register read values at this place. Thanks, Harikrishnan" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25898", "/support/power-management/f/196/tags/BQ24298", "/support/power-management/f/196/tags/Bq25898%2b_2D00_%2bcharger%2bregister%2bread%2bis%2bnot%2bappropriate%2bvalues", "/support/power-management/f/196/tags/EV2400" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898629.json b/data/json/DLP/898629.json new file mode 100644 index 0000000000000000000000000000000000000000..e6106ea6242a20ff50a5a7fad0b23e930f7f61a6 --- /dev/null +++ b/data/json/DLP/898629.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898629", + "reporterName" : "user4345157", + "rankPoints" : "290", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS2514: Use questions", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 13", + "queryText" : "Part Number: TPS2514 Our company now uses the tps2514dbvr chip. Now in the process of using it, we find that it can support Android phones when charging mobile phones, 但是不能支持苹果手机充电. But it can't support Apple mobile phone charging（IOS） 请问一下：这款IC原理上支持苹果手机吗？是否需要苹果授权之类？理论上是否现在支持苹果等手机充电， Excuse me: does this IC support Apple phones in principle? Do you need an apple license or something? In theory, does it support charging of mobile phones such as apple, 是不是以后都没有问题？不管是否出现新款的手机或IOS系统。 Is there no problem in the future? Whether or not there is a new mobile phone or IOS system. 另外再问一下：TPS2514ADBVR和TPS2514DBVR这两个料有些什么区别？ What's the difference between tps2514adbvr and tps2514dbvr?", + "partNumber" : " TPS2514", + "allResponseList" : [ { + "contentId" : "3322749", + "userName" : "Adam Mc Gaffin", + "rankPoints" : "13080", + "rankName" : "Genius", + "date" : "Apr 21, 2020 12:44 PM", + "userId" : "4996939", + "content" : "Hello, Yes, the TPS2514 supports the apple divider charging schemes. To determine which divider mode is negotiated, you must measure the voltage on DP/DM. If apple continues to support their legacy charging in their new phones it should not be a problem. However, if they do change their charger detection, then yes that would be a problem but there would be no way for us to know or control that." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS2514", "/support/power-management/f/196/tags/TPS2514_3A00_" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898631.json b/data/json/DLP/898631.json new file mode 100644 index 0000000000000000000000000000000000000000..6e057212e30514a3a58cfaca7885ee20c6cef55f --- /dev/null +++ b/data/json/DLP/898631.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898631", + "reporterName" : "Hugo Liu", + "rankPoints" : "5095", + "resolutionStatus" : "", + "ticketName" : "BQ24196: BQ24196 discharge issue.", + "rankName" : "Genius", + "replies" : " 1", + "views" : " 16", + "queryText" : "Part Number: BQ24196 Hi Sir, Our customer used the BQ24196RGER for charger application, The RD setting Charge Voltage is 4.35V, But they are measure 4.1V discharge the battery. Could you please support this issue? Hugo", + "partNumber" : " BQ24196", + "allResponseList" : [ { + "contentId" : "3323579", + "userName" : "Ning T", + "rankPoints" : "15365", + "rankName" : "Genius", + "date" : "Apr 22, 2020 12:24 AM", + "userId" : "145100", + "content" : "Hugo, What are your test conditions such as VBUS (voltage at VBUS pin), IBUS, VBAT (voltage at BAT pin), IBAT, VSYS, ISYS? Could you please provide all register values of the charger? Thanks, Ning" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24196" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898635.json b/data/json/DLP/898635.json new file mode 100644 index 0000000000000000000000000000000000000000..198ffc2bdd300fe910229e684665c553812f6f95 --- /dev/null +++ b/data/json/DLP/898635.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898635", + "reporterName" : "user6052098", + "rankPoints" : "70", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ25710: Pass through mode entry and exit", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: BQ25710 Device will be transition from normal Buck-Boost operation to PTM operation by: ? Set REG0x31[7] = 0, to disable the EN_EXITILIM. ? Set REG0x30[8] = 1. ? Set REG0x30[2] = 1. ? Ground ILIM_HIZ pin. Device will transition out of PTM mode with host control by: ? Set REG0x30[2] = 0. ? Pull ILIM_HIZ pin to high. ? Device exits PTM to buck-boost operation if tripping VinDPM. ? Device exits PTM to buck-boost operation under fault conditions (for examples ACOC, TSHUT, BATOC, BATOV). 1、According to the above from datasheet, need host a GPIO control to change ILIM_HIZ PIN low or high to eanble or disable PTM Mode? Can BQ25710 control this PIN by setting reg? 2、Should the charge bat function be enable during PTM mode? Ps: system input 19V，Bat 4cell。", + "partNumber" : " BQ25710", + "allResponseList" : [ { + "contentId" : "3323241", + "userName" : "Tiger Zhou", + "rankPoints" : "610", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 5:53 PM", + "userId" : "1451791", + "content" : "Hi, there, 1. You need to pull the ILIM_HIZ pin to ground by a GPIO or a jumper. 2. It is not suggested to charge the battery during PTM mode." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25710" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898637.json b/data/json/DLP/898637.json new file mode 100644 index 0000000000000000000000000000000000000000..1182e02f50b4a092b119b4df93fcae664aec415f --- /dev/null +++ b/data/json/DLP/898637.json @@ -0,0 +1,71 @@ +{ + "ticketNumber" : "898637", + "reporterName" : "Nam, Dino", + "rankPoints" : "3425", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS610982: Input capacitor short failure", + "rankName" : "Expert", + "replies" : " 7", + "views" : " 30", + "queryText" : "Part Number: TPS610982 Dear team, My customer are using TPS610982 at their application. but there is some issue. If the input capacitor(C27,28,29) is shorted to GND due to crack or something, Can this give a damage to the device like leakage current? I think the reverse current would give a damage to internal switch under input short status. what do you think? Thank you.", + "partNumber" : " TPS610982", + "allResponseList" : [ { + "contentId" : "3324056", + "userName" : "Minqiu Xie", + "rankPoints" : "12515", + "rankName" : "Genius", + "date" : "Apr 22, 2020 10:00 AM", + "userId" : "5303427", + "content" : "Hi Dino: Firstly, please allow me check if the battery is still connected when Vin shorted?" + }, { + "contentId" : "3324063", + "userName" : "Minqiu Xie", + "rankPoints" : "12515", + "rankName" : "Genius", + "date" : "Apr 22, 2020 10:12 AM", + "userId" : "5303427", + "content" : "Hi Dino: About your question, the IC won't damage if just short the VIN to ground. But I afraid the power supply will damaged." + }, { + "contentId" : "3324126", + "userName" : "Nam, Dino", + "rankPoints" : "3425", + "rankName" : "Expert", + "date" : "Apr 22, 2020 11:28 AM", + "userId" : "3645424", + "content" : "Hi Minqiu, Thank you for your reply. Do you mean the IC won't damage if just short the VIN to ground although the battery is still connected? If the VIN(battery) is suddenly short to GND during operation, I am concerned about damage by reverse current. Let me know your opinion. Thank you." + }, { + "contentId" : "3324500", + "userName" : "Minqiu Xie", + "rankPoints" : "12515", + "rankName" : "Genius", + "date" : "Apr 22, 2020 3:20 PM", + "userId" : "5303427", + "content" : "Hi Dino: The High side FET will turn off once detect reverse current. And if the Vout drop a lot, the converter will disable, and all FET turn off. There is no route for reverse current. And the leakage current is small and won't damage the IC." + }, { + "contentId" : "3324522", + "userName" : "Nam, Dino", + "rankPoints" : "3425", + "rankName" : "Expert", + "date" : "Apr 22, 2020 3:30 PM", + "userId" : "3645424", + "content" : "Hi Minqiu, Thank you for your help. To clarify, \"And if the Vout drop a lot, the converter will disable, and all FET turn off.\" ==> Vout drop??, do you mean Vin drop? due to short the VIN to ground. Is it right? Thank you." + }, { + "contentId" : "3324579", + "userName" : "Minqiu Xie", + "rankPoints" : "12515", + "rankName" : "Genius", + "date" : "Apr 22, 2020 4:00 PM", + "userId" : "5303427", + "content" : "Hi Dino: If the Vin is short to ground, it can't supply the load anymore. So the Vout will drop, and cause the IC back to start. (Sorry, I shouldn't call it disable before) Is there any power supply for Vout?" + }, { + "contentId" : "3324611", + "userName" : "Nam, Dino", + "rankPoints" : "3425", + "rankName" : "Expert", + "date" : "Apr 22, 2020 4:18 PM", + "userId" : "3645424", + "content" : "Hi Minqiu, There is no additional supply for Vout. There is only Vin(VBAT) connected battery. Thank you for your opinion. The customer wanted to know if Vin is short to GND could cause IC damage(leakage current).Your reply was very helpful. I will reply to the customer as follows. \"The IC won't damage if just short the VIN to ground. But I afraid the power supply will damaged. Thank you." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS610982" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898646.json b/data/json/DLP/898646.json new file mode 100644 index 0000000000000000000000000000000000000000..a5d51b2ffa9ed90a4a386cb3be3e6803c55250e2 --- /dev/null +++ b/data/json/DLP/898646.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898646", + "reporterName" : "Yuan_1980", + "rankPoints" : "100", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM5050-1: How to adjust Vgs?", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 11", + "queryText" : "Part Number: LM5050-1 Hi experts, I want to adjust Vgs to 8V, Could you please suggest how to do this？ I tried to modify below R1, but no use.", + "partNumber" : " LM5050-1", + "allResponseList" : [ { + "contentId" : "3323273", + "userName" : "Karikalan Selvaraj", + "rankPoints" : "13870", + "rankName" : "Genius", + "date" : "Apr 21, 2020 6:20 PM", + "userId" : "1601212", + "content" : "Hi Gate voltage of MOSFET is controlled by LM5050-1 based on the load current. At light load, gate voltage will be close to MOSFET Vth and at high load current, gate voltage will be high. This is due to the linear regulation control mechanism. It is not possible to fix the gate voltage to 8V at all conditions. If you wish to clamp gate voltage to 8V, you can add a zener clamp from gate to IN pin to clamp it to a known maximum value. Regards, Kari." + } ], + "tags" : [ "/support/power-management/f/196/tags/LM5050_2D00_1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898651.json b/data/json/DLP/898651.json new file mode 100644 index 0000000000000000000000000000000000000000..c7662b1ce5077b0ab8538b1c2d9c486a5b7e9949 --- /dev/null +++ b/data/json/DLP/898651.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "898651", + "reporterName" : "Kazuki Kitajima", + "rankPoints" : "770", + "resolutionStatus" : "Resolved", + "ticketName" : "LM2596: Inductor Selection", + "rankName" : "Intellectual", + "replies" : " 5", + "views" : " 25", + "queryText" : "Part Number: LM2596 Hello team! I got the question about Inductor selection from the customer. Could you tell me how to select the inductor if the current is below 0.6A? For the reference, the power line is 24Vin to 5Vout/0.2A. WEBENCH recommended 330uH for this line. But I would appreciate if your team have any advice for inductor selection. Best Regards, Kazuki Kitajima", + "partNumber" : " LM2596", + "allResponseList" : [ { + "contentId" : "3322308", + "userName" : "Kazuki Kitajima", + "rankPoints" : "770", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 5:18 AM", + "userId" : "5298707", + "content" : "Hello team, Sorry for posting again. But could you tell me one more thing about inductor selection? In the DS figure8, L38 section. Inductor would be 68uH/3.1A. I'm assuming the current value 3.1A is selected because of the margin. Is it okay to use an inductor which has lower current value in case of lower load current? The customer would try to use 68uH / 2.5A conductor for 1.67A line. Best Regards, Kazuki Kitajima" + }, { + "contentId" : "3322959", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 21, 2020 2:43 PM", + "userId" : "3498075", + "content" : "Hi Kazuki, Pls follow the instruction on data sheet for inductor selection as the inductor and Cout value are critical for loop stability. LM2596 is over capability for 0.2A load current, the inductor also require high saturation current to work with a 3A converter even load is 0.2A. can customer try latest LMR33610 or TPS560430 ? B R Andy" + }, { + "contentId" : "3323621", + "userName" : "Kazuki Kitajima", + "rankPoints" : "770", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 1:15 AM", + "userId" : "5298707", + "content" : "Hello Andy-san, Thank you for your reply. LM2596's inductor selection section looks different as the latest devices... The DS indicates that inductor value should be selected from the metrics in the DS which doesn't include below 0.6A. I understand this device is very old and we have better devices but I would really appreciate it if you would provide some advice for that. Also thank you for recommending those devices. I'm going to send an e-mail to you directly to explain the customer situation. Best Regards, Kazuki Kitajima" + }, { + "contentId" : "3323652", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 22, 2020 1:56 AM", + "userId" : "3498075", + "content" : "Hi Kazuki, Pls select inductor based on 0.6A load current. If design inductor based on 0.2A load current, it maybe 3X bigger than 0.6A load condition, the too big inductor will cause loop stability issue. B R Andy" + }, { + "contentId" : "3323717", + "userName" : "Kazuki Kitajima", + "rankPoints" : "770", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 3:06 AM", + "userId" : "5298707", + "content" : "Andy-san, Thank you for your reply! I'll tell the customer to refer to the 0.6A point in the figure. Best Regards, Kazuki Kitajima" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM2596" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898657.json b/data/json/DLP/898657.json new file mode 100644 index 0000000000000000000000000000000000000000..025a3eb919aab50656ee0480d01057963965fde6 --- /dev/null +++ b/data/json/DLP/898657.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898657", + "reporterName" : "PAN-M", + "rankPoints" : "7410", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS51604: Output drive current", + "rankName" : "Mastermind", + "replies" : " 1", + "views" : " 13", + "queryText" : "Part Number: TPS51604 Dear all. Would you please teach me about DRVH and DRVL output current of TPS51604? Regards, PAN-M", + "partNumber" : " TPS51604", + "allResponseList" : [ { + "contentId" : "3322718", + "userName" : "Qian Chen", + "rankPoints" : "21370", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 12:32 PM", + "userId" : "1501908", + "content" : "Hi PAN-M, The sourcing and sink resistance of gate drive is available in spec table on datasheet page 4. The sourcing and sink current can be calculated as (VDD-Vgate)/Rgate For example, the typical sourcing resistance of DRVL is 1.5ohm, the VDD voltage is 5V, the initial gate voltage is 0V. Then the initial sourcing current is (5V-0V)/1.5ohm=3.33A. With gate voltage increases, the sourcing current decrease. Thanks Qian" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS51604" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898660.json b/data/json/DLP/898660.json new file mode 100644 index 0000000000000000000000000000000000000000..6b46267f0e6c9d516a6bf76ff5d16c6ecc7530f7 --- /dev/null +++ b/data/json/DLP/898660.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898660", + "reporterName" : "Wesley Lai", + "rankPoints" : "220", + "resolutionStatus" : "Resolved", + "ticketName" : "LM3410: Drive high-current LEDs through the LM3410", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 15", + "queryText" : "Part Number: LM3410 Dear Sir, I have a project need 1000 lm or more. My setting conditions are as follows: LED : OSRAM LED (Vf 2.7V-3.0V / If 700mA ). LED Q'ty : 4 pcs LED / 1 serial (the voltage is 10.8V-12V and the current is 700mA). Power : Li-poly battery (3.7V / 5000 mA). Dimming : PWM signal from Arduino. If I use LM3410 to drive it, is it ok ? If not, please give me some suggestion. Thank you.", + "partNumber" : " LM3410", + "allResponseList" : [ { + "contentId" : "3322788", + "userName" : "Irwin Nederbragt", + "rankPoints" : "20765", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 1:02 PM", + "userId" : "1880111", + "content" : "Hello Wesley, This will exceed the peak switch current minimum of 2.1A. At 3.7V input, 12V output at 700 mA the average on time current of the LM3410 would be 2.35A. This is including 0.4V for the boost diode. This does not include current ripple or efficiency. This part doesn't quite have the capability you are looking for especially if your input voltage can drop. You can try it knowing this limitation. Note that your design will need low inductor current ripple and will need good heatsinking for the LM3410. We don't have a part for low input voltage and higher output power like this. Best Regards," + } ], + "tags" : [ "/support/power-management/f/196/tags/LM3410" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898661.json b/data/json/DLP/898661.json new file mode 100644 index 0000000000000000000000000000000000000000..16a2663490dbfa22ac5367080846723ba9edcfca --- /dev/null +++ b/data/json/DLP/898661.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898661", + "reporterName" : "MINKYUNG KIM", + "rankPoints" : "170", + "resolutionStatus" : "", + "ticketName" : "ZU19EG reference design", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 28", + "queryText" : "Hi, Is there any update for this thread? I also need a power reference design for ZU19EG, but I cannot find it out in . Otherwise, can you recommend any reference design for other FPGA models which are similar to ZU19EG so that I can refer to that? Thank you for your prompt response!", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3323415", + "userName" : "LeonardEllis", + "rankPoints" : "52175", + "rankName" : "Guru", + "date" : "Apr 21, 2020 8:17 PM", + "userId" : "584482", + "content" : "Hello Minkyung, Please use the Xylinx FPGA Power page and search for relevant designs: /design-resources/design-tools-simulation/processor-fpga-power/xilinx.html . You will see these selections to explore. If you have any questions about any of these designs, please post a new inquiry with the part number in the description. Regards, ~Leonard" + } ], + "tags" : [ ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898664.json b/data/json/DLP/898664.json new file mode 100644 index 0000000000000000000000000000000000000000..12dfe08a04c99e601e012cee8d1907182910780f --- /dev/null +++ b/data/json/DLP/898664.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "898664", + "reporterName" : "Koji Hayashi92", + "rankPoints" : "4905", + "resolutionStatus" : "Resolved", + "ticketName" : "The charge cycle", + "rankName" : "Genius", + "replies" : " 4", + "views" : " 30", + "queryText" : "Part Number: BQ24105-Q1 Hi TI-team My customer have question. /support/power-management/f/196/p/881153/3269081#3269081 Regarding the answer to the above URL. What does \"the charge cycle (and in this part's case, the entire state machine) \"mean ? What is the harmful effect of being reset ? Best Regards, Koji Hayashi", + "partNumber" : " BQ24105-Q1", + "allResponseList" : [ { + "contentId" : "3323429", + "userName" : "Michael Emanuel35", + "rankPoints" : "2055", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 8:34 PM", + "userId" : "4996893", + "content" : "Dear Koji, The charger follows a specific algorithm about when to start charging based upon the state of the battery and various other conditions specified in the datasheet. The state machine refers to the algorithm. What reset are you talking about specifically? Thanks, Mike Emanuel Please click \"This resolved my issue\" button if this post answers your question." + }, { + "contentId" : "3323630", + "userName" : "Koji Hayashi92", + "rankPoints" : "4905", + "rankName" : "Genius", + "date" : "Apr 22, 2020 1:31 AM", + "userId" : "4971279", + "content" : "Hi Mike-san Thank you for quick response. Is there a description in the data sheet about \"algorithm\" ? >What reset are you talking about specifically? ”it resets the charge cycle (and in this part's case, the entire state machine)\" What are the harmful effects of the above resets ? Best Regards, Koji Hayashi" + }, { + "contentId" : "3324653", + "userName" : "Michael Emanuel35", + "rankPoints" : "2055", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 4:48 PM", + "userId" : "4996893", + "content" : "Koji-san, The operational flow chart on page 10 of the datasheet describes the state machine in detail. Toggling the CE pin will reset the state machine. Thanks, Mike Emanuel Please click \"This resolved my issue\" button if this post answers your question." + }, { + "contentId" : "3328270", + "userName" : "Koji Hayashi92", + "rankPoints" : "4905", + "rankName" : "Genius", + "date" : "Apr 27, 2020 4:27 AM", + "userId" : "4971279", + "content" : "Hi Mike-san Thank you for quick response. I understand. I will answer to my customer. Best Regards, Koji Hayashi" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24105_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898667.json b/data/json/DLP/898667.json new file mode 100644 index 0000000000000000000000000000000000000000..24588834bf3355605bc645f1d67b4c2a883707f2 --- /dev/null +++ b/data/json/DLP/898667.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "898667", + "reporterName" : "kaipeng chu", + "rankPoints" : "130", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LDC2112: Minimum Gap between Inductive sensing and PCBA’s IC", + "rankName" : "Prodigy", + "replies" : " 6", + "views" : " 62", + "queryText" : "Part Number: LDC2112 Dear Sir, I updated our product structure, please see attached JPG file. We have two questions about the LDC2112 design that show as below, please help confirm. 1.The Minimum Gap between Inductive sensing and PCBA’s IC. We have used ferrite sheet, what is the minimum distance between PCBA’s IC and sensor coil? Are there related documents mentioning the conditions for our design? Can you provide a suggested distance. 2.How to choose the material and thickness of Ferrite? Are there any relevant documents for reference? Or provide the recommended material. B.R. Ken", + "partNumber" : " LDC2112", + "allResponseList" : [ { + "contentId" : "3322609", + "userName" : "kaipeng chu", + "rankPoints" : "130", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 10:04 AM", + "userId" : "6300042", + "content" : "Dear sir, Update the questions, We have 4 questions about the LDC2112 design that show as below, please help confirm. 1.The Minimum Gap between ferrite sheet and PCBA’s IC. We have used ferrite sheet, what is the minimum distance between PCBA’s IC and sensor coil? 2.The Minimum Gap between Inductive sensing and PCBA’s IC. We don't have used ferrite sheet, what is the minimum distance between PCBA’s IC and sensor coil? Are there related documents mentioning the conditions for our design? Can you provide a suggested distance. 3.How to choose the material and thickness of Ferrite? also check the Permeability VS Frequency? Are there any relevant documents for reference? Or provide the recommended material. B.R. Ken" + }, { + "contentId" : "3323668", + "userName" : "Arjun_Prakash", + "rankPoints" : "3090", + "rankName" : "Expert", + "date" : "Apr 22, 2020 2:19 AM", + "userId" : "1287488", + "content" : "Hello Ken, Thank you for your post. Our expert Engineer will get back to you very shortly on this." + }, { + "contentId" : "3323706", + "userName" : "Kristin Jones93", + "rankPoints" : "15785", + "rankName" : "Genius", + "date" : "Apr 22, 2020 2:57 AM", + "userId" : "4996845", + "content" : "Hi Ken, Questions 1 and 2 are primarily mechanical questions. I don't have an exact number to give you, but I can give you guidelines to think about: The sensor coil should move as little as possible. FPC sensors should have a support structure and a stiffener to immobilize the sensor coil as much as possible, especially during button presses. The button response will be reduced if the sensor moves away from the coil during a button press, and this can lead to long-term reliability issues. From a mechanical standpoint, you only need enough space so that the sensor coil and its support structure will not touch the ICs, including manufacturing tolerances. From an electrical standpoint, the sensor coil will be radiating an electromagnetic field at the sensor's resonant frequency. With the ferrite layer in between the ICs and the sensor, this radiation may not be an issue. I would not suggest placing sensitive ICs below the sensor without ferrite shielding. For question 3, we have this blog post that discusses ferrite shielding. I suggest browsing through similar products to see what thicknesses are available that could work for your stackup. The permeability information will be available in the product's datasheet. Finally, please note that you do need to have space for the metal target to deform, so the target cannot be touching the sensor coil. I realize that this may be a simplified drawing, but I just wanted to make it clear that there needs to be space between the target and coil. Best Regards," + }, { + "contentId" : "3323933", + "userName" : "kaipeng chu", + "rankPoints" : "130", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 7:51 AM", + "userId" : "6300042", + "content" : "Hi Kristin, Yes, this is only a simplified drawing, we have noticed this space for the metal target to deform. About electromagnetic field, do you mean that the electromagnetic field generated by the sensor coil will affect the sensitive ICs on the PCBA? Best Regards, Ken" + }, { + "contentId" : "3328273", + "userName" : "kaipeng chu", + "rankPoints" : "130", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 4:42 AM", + "userId" : "6300042", + "content" : "Hi Kristin, About electromagnetic field, do you mean that the electromagnetic field generated by the sensor coil will affect the sensitive ICs on the PCBA? or the sensor coil affected by other devices? Best Regards, Ken" + }, { + "contentId" : "3329494", + "userName" : "Kristin Jones93", + "rankPoints" : "15785", + "rankName" : "Genius", + "date" : "Apr 27, 2020 8:56 PM", + "userId" : "4996845", + "content" : "Hi Ken, It's more likely that the sensor coil's radiated field could impact the ICs. If they are not sensitive to the sensor frequency, then it may not be an issue, but it is safer to keep the ICs away from the coil. Unless the ICs are radiating a frequency within the narrow pass-band of the LC tank, they should not impact the sensor. Best Regards," + } ], + "tags" : [ "/support/sensors/f/1023/tags/LDC2112" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898669.json b/data/json/DLP/898669.json new file mode 100644 index 0000000000000000000000000000000000000000..d6ee8dd0c0225713cd7b47de33613bbce053b02e --- /dev/null +++ b/data/json/DLP/898669.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "898669", + "reporterName" : "Koji Hayashi92", + "rankPoints" : "4905", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ24105-Q1: Precharge Charging Time", + "rankName" : "Genius", + "replies" : " 2", + "views" : " 17", + "queryText" : "Part Number: BQ24105-Q1 Hi TI-team. My customer's perception, the precharge charging time is 1440s to 2160s regardless of the capacitance value of the TTC pin capacitor. Is this perception correct ? Best Regards, Koji Hayashi", + "partNumber" : " BQ24105-Q1", + "allResponseList" : [ { + "contentId" : "3323435", + "userName" : "Michael Emanuel35", + "rankPoints" : "2055", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 8:39 PM", + "userId" : "4996893", + "content" : "Koji, TTC affects the charge timer only. The precharge timer is a fixed specification. Thanks, Mike Emanuel Please click \"This resolved my issue\" button if this post answers your question." + }, { + "contentId" : "3323634", + "userName" : "Koji Hayashi92", + "rankPoints" : "4905", + "rankName" : "Genius", + "date" : "Apr 22, 2020 1:38 AM", + "userId" : "4971279", + "content" : "Hi Mike-san Thank you for quick response. I understand. Best Regards, Koji Hayashi" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24105_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898678.json b/data/json/DLP/898678.json new file mode 100644 index 0000000000000000000000000000000000000000..9581c3d42c6764f326be3839334b2e4c70ed248e --- /dev/null +++ b/data/json/DLP/898678.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "898678", + "reporterName" : "Koji Hayashi92", + "rankPoints" : "4905", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ24105-Q1: Discharging while charging", + "rankName" : "Genius", + "replies" : " 4", + "views" : " 26", + "queryText" : "Part Number: BQ24105-Q1 Hi TI-team. My customer have question. Can the BQ24105-Q1 discharge the battery while charging? Best Regards, Koji Hayashi", + "partNumber" : " BQ24105-Q1", + "allResponseList" : [ { + "contentId" : "3323439", + "userName" : "Michael Emanuel35", + "rankPoints" : "2055", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 8:42 PM", + "userId" : "4996893", + "content" : "Dear Koji, The battery is a two terminal device. Current either goes in (charging) or charge current comes out (discharging). Thanks, Mike Emanuel Please click \"This resolved my issue\" button if this post answers your question." + }, { + "contentId" : "3323646", + "userName" : "Koji Hayashi92", + "rankPoints" : "4905", + "rankName" : "Genius", + "date" : "Apr 22, 2020 1:46 AM", + "userId" : "4971279", + "content" : "Hi Mike-san Thank you for quick response. Does this mean that the IC can discharge the battery while charging ? Best Regards, Koji Hayashi" + }, { + "contentId" : "3324642", + "userName" : "Michael Emanuel35", + "rankPoints" : "2055", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 4:41 PM", + "userId" : "4996893", + "content" : "Koji-san, The IC cannot both simultaneously discharge the battery and charge the battery. Both of these states are mutually exclusive. In fact, there are three basic states: charging, discharging, and not charging. You cannot be in more than one of these states at a time. Thanks, Mike Emanuel Please click \"This resolved my issue\" button if this post answers your question." + }, { + "contentId" : "3325352", + "userName" : "Koji Hayashi92", + "rankPoints" : "4905", + "rankName" : "Genius", + "date" : "Apr 23, 2020 7:32 AM", + "userId" : "4971279", + "content" : "Hi Mike-san Thank you for quick response. We will answer to my customer. Best Regards, Koji Hayashi" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24105_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898681.json b/data/json/DLP/898681.json new file mode 100644 index 0000000000000000000000000000000000000000..6304efa1380161718c9b500320cb68f872a6d3e1 --- /dev/null +++ b/data/json/DLP/898681.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898681", + "reporterName" : "Vladimir Kristalny", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS65287: TPS65287", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 13", + "queryText" : "Part Number: TPS65287 Dear, Mr I didn't find the maximum input current of the TPS65287 in the data sheet. Please, advise. I'm going to use the TPS65287 in mode: - Vin =+12V; - Vout1=+3.3V (about 3A); - Vout2=+5V (about 2A); - Vout3=+10 (about 1.5A). Is it right? Best regards. Vladimir", + "partNumber" : " TPS65287", + "allResponseList" : [ { + "contentId" : "3322621", + "userName" : "Zhao Ma", + "rankPoints" : "7070", + "rankName" : "Expert", + "date" : "Apr 21, 2020 10:20 AM", + "userId" : "4727719", + "content" : "Hi, Vladimir I afraid TPS65287 cannot support your application. The big concern is IC's temperature. Below is package dissipation, at 25C, IC only can bear 3.33W. For 3.3Vout1, assume the Eff is about 90%, then the Pd=1.1W. For 5Vout2, assume the Eff is about 85%, then the Pd=1.76W. For 10Vout3, assume the Eff is 75%, then the Pd=5W. The total Pd=7.86W, which will cause IC triggers over temperature protection." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS65287" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898684.json b/data/json/DLP/898684.json new file mode 100644 index 0000000000000000000000000000000000000000..228ef6e1e45f81651edceec6e2307e62e0d18054 --- /dev/null +++ b/data/json/DLP/898684.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "898684", + "reporterName" : "Ty12199", + "rankPoints" : "50", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LMR14050: LMR14050: Part getting too hot.", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 20", + "queryText" : "Part Number: LMR14050 So I am thinking maybe I need to go to a higher power part, but just want to check if there is anything I can do otherwise. I have a design that takes in 20V from a battery and drops it down to 12V to a 3.5A blower fan. So the part is getting very hot and I was thinking I wasn't that close to the 5A max, but maybe because of the voltages I am using it dissipates too much power. I also only have a 2 layer board and didn't realize they were assuming you use 4 layers. Layout.", + "partNumber" : " LMR14050", + "allResponseList" : [ { + "contentId" : "3322573", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 21, 2020 9:32 AM", + "userId" : "3498075", + "content" : "Hi, The PCB layout design is not optimized for thermal, even a 5A regulator will also be very hot with this design: Pls arrange it as below if you want to re-design it:" + }, { + "contentId" : "3323562", + "userName" : "Ty12199", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 11:34 PM", + "userId" : "1267189", + "content" : "Thank you i make those changes on my next prototype and I was looking at maybe adding a heat sink to the back side for good measure." + } ], + "tags" : [ "/support/power-management/f/196/tags/LMR14050" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898689.json b/data/json/DLP/898689.json new file mode 100644 index 0000000000000000000000000000000000000000..436d20b1130d3ea9296ebdc744c809c70525049b --- /dev/null +++ b/data/json/DLP/898689.json @@ -0,0 +1,71 @@ +{ + "ticketNumber" : "898689", + "reporterName" : "Koji Hayashi92", + "rankPoints" : "4905", + "resolutionStatus" : "", + "ticketName" : "BQ24105-Q1: Items listed in the data sheet", + "rankName" : "Genius", + "replies" : " 7", + "views" : " 36", + "queryText" : "Part Number: BQ24105-Q1 Hi TI-team. My customer has some questions about the items mentioned in the data sheet. Would you give me an answer ? 1, In the data sheet, VI (BAT) and VIBAT are written, but are these words having different meanings ? 2, VOREG voltage is the recognition that it is the charging voltage to the battery. Is it correct ? 3, How should the voltage of VOREG be determined ? For example, if the full charge voltage of the battery used is 3.9V/3Cell, set the VOREG voltage to 3.9V as well ? 4, The VOREG-VRCH voltage is listed on the recharge voltage and data sheet. Therefore, my understanding, when the battery is fully charged, the recharge threshold is set so that VOREG-VRCH \"TS Pin in LTF to TCO Range ?\" -> \"FSTCHG Timer Expired ?\" -> \"VBAT \"ITERM detection ?\" are continued until \"POR\" ？ Best Regards, Koji Hayashi", + "partNumber" : " BQ24105-Q1", + "allResponseList" : [ { + "contentId" : "3323469", + "userName" : "Michael Emanuel35", + "rankPoints" : "2055", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 9:08 PM", + "userId" : "4996893", + "content" : "Dear Koji, 1. This part of the flowchart demonstrates that if the FSTCHG timer has not expired, the state machine will next see if the battery is below VLOWV. If it is, pre-charge will restart. If it is not, the part will try and detect termination. 2. If the part dips below the recharge threshold, the charger will return to the start of the flow. 3. All of the \"Suspend charge\" refer to temperature qualification. This time is not fixed and charge will remain suspended until the voltage on the TS pin returns to the correct level. 4. If termination is not detected, the part will continue to charge until it does following the blocks you indicated. It will then stay in \"Charge Complete\" until the voltage drops below the recharge threshold. Thanks, Mike Emanuel Please click \"This resolved my issue\" button if this post answers your question." + }, { + "contentId" : "3326832", + "userName" : "Koji Hayashi92", + "rankPoints" : "4905", + "rankName" : "Genius", + "date" : "Apr 24, 2020 8:58 AM", + "userId" : "4971279", + "content" : "Hi Mike-san Customer have a question about answer 1. Please see OPERATIONAL FLOW CHART.xlsx. OPERATIONAL FLOW CHART.xlsx The condition of \"VBAT> VLOWV\" has already been met in the precharge flow in the red line, but why do FST charge until the ICHARGE current becomes \"VBAT> VLOWV\" in the flow in the blue line ? Since the condition of \"VBAT> VLOWV\" cannot be satisfied within 30 min in the precharge flow, it can be understood if it is charged until \"VBAT> VLOWV\" in the quick charge flow, but this flow does it haven't. In the data sheet, VLOWV is described as \"Transition voltage threshold from precharge to fast charge\". Since it has already switched to quick charge, isn't it different to judge the completion of charging by the threshold of VLOWV ? Best Regards, Koji Hayashi" + }, { + "contentId" : "3327677", + "userName" : "Michael Emanuel35", + "rankPoints" : "2055", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 11:43 PM", + "userId" : "4996893", + "content" : "Koji-san, The first check of the box \"VBATVLOWV. If you are in the blue line, the pre-charge timer does not apply and only the fast-charge timer applies. The completion of fast-charging is not determined by VLOWV, it is determined by the termination detection. Thanks, Mike Emanuel Please click \"This resolved my issue\" button if this post answers your question." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24105_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898715.json b/data/json/DLP/898715.json new file mode 100644 index 0000000000000000000000000000000000000000..455bd96b1a5edd0a95a9fd788887596c3ea36815 --- /dev/null +++ b/data/json/DLP/898715.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898715", + "reporterName" : "Koji Hayashi92", + "rankPoints" : "4905", + "resolutionStatus" : "", + "ticketName" : "BQ24105-Q1: Schematic confirm", + "rankName" : "Genius", + "replies" : " 1", + "views" : " 20", + "queryText" : "Part Number: BQ24105-Q1 Hi TI-team Please confirm if my customer's schematic works according to the charging flow. I will show you the circuit diagram by applying for friendship or telling me your E-mail address. Best Regards, Koji Hayashi", + "partNumber" : " BQ24105-Q1", + "allResponseList" : [ { + "contentId" : "3323524", + "userName" : "Michael Emanuel35", + "rankPoints" : "2055", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 10:22 PM", + "userId" : "4996893", + "content" : "Koji, You can add me for support. Thanks, Mike Emanuel" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24105_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898717.json b/data/json/DLP/898717.json new file mode 100644 index 0000000000000000000000000000000000000000..449ba78e19c359c1f80b47caa2b77389b4efb179 --- /dev/null +++ b/data/json/DLP/898717.json @@ -0,0 +1,79 @@ +{ + "ticketNumber" : "898717", + "reporterName" : "user4782171", + "rankPoints" : "1170", + "resolutionStatus" : "Resolved", + "ticketName" : "UCC27511: max. junction temperature", + "rankName" : "Intellectual", + "replies" : " 8", + "views" : " 45", + "queryText" : "Part Number: UCC27511 Hi Team, My customer would like to know UCC27511 max junction temperature spec. Would you please help for it? Or can I assume and use 150°C for the Tj max. Note. From datasheet that one list the recommend Operating junction temperature range is –40°C to 140°C and Tstg is –65°C to 150°C. Best regards, Albert Lee.", + "partNumber" : " UCC27511", + "allResponseList" : [ { + "contentId" : "3322737", + "userName" : "Mamadou Diallo", + "rankPoints" : "7305", + "rankName" : "Expert", + "date" : "Apr 21, 2020 12:38 PM", + "userId" : "4708570", + "content" : "Hello Albert, Please refer to Table 7.3 Recommended Operating Conditions and 7.1 Abs Max table in the datasheet. Regards, -Mamadou" + }, { + "contentId" : "3323673", + "userName" : "Don Dapkus", + "rankPoints" : "174575", + "rankName" : "Guru", + "date" : "Apr 22, 2020 2:23 AM", + "userId" : "1027", + "content" : "Hi, Albert, I got a weird email from the system. Did you need more help with this issue? Let Mamadou and me know if so!" + }, { + "contentId" : "3323676", + "userName" : "user4782171", + "rankPoints" : "1170", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 2:28 AM", + "userId" : "4782171", + "content" : "Hi Mamadou, thanks but can't find the table 7.3, and I know the recommended operating conditions is –40°C to 140°C which listed in 8.3 (page 7) and Tstg is –65°C to 150°C in 8.2 (page 7) as I previous mentioned . In 8.1 Absolute Maximum Ratings didn't have the max junction temperature information also. Best regards, Albert Lee." + }, { + "contentId" : "3323677", + "userName" : "user4782171", + "rankPoints" : "1170", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 2:33 AM", + "userId" : "4782171", + "content" : "Hi Don Dapkus, It seems caused by E2E locked. Anyway, the datasheet you listed is UCC23511 but what I want have is UCC27511. Would you please check for it Or I can use 150deg.C as max junction temperature for UCC27511. Best regards, Albert Lee." + }, { + "contentId" : "3323688", + "userName" : "Don Dapkus", + "rankPoints" : "174575", + "rankName" : "Guru", + "date" : "Apr 22, 2020 2:45 AM", + "userId" : "1027", + "content" : "Hi, Albert, I've asked Mamadou to follow-up with you on this question. Sorry for the confusion!" + }, { + "contentId" : "3323689", + "userName" : "Mamadou Diallo", + "rankPoints" : "7305", + "rankName" : "Expert", + "date" : "Apr 22, 2020 2:45 AM", + "userId" : "4708570", + "content" : "Albert, As mentioned in previous email, please refer to the Tables in d/s below. /lit/ds/symlink/ucc27511.pdf I hope this addresses your question. Regards, -Mamadou" + }, { + "contentId" : "3323719", + "userName" : "user4782171", + "rankPoints" : "1170", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 3:07 AM", + "userId" : "4782171", + "content" : "Hi Mamadou, Thanks but can't it didn't have the max. junction temperature as previous mentioned. I know the recommended operating conditions is –40°C to 140°C which listed in 8.3 (page 7) and Tstg is –65°C to 150°C in 8.2 (page 7). But it's a recommended operating temperature not absolute max rating, isn't it? In 8.1 Absolute Maximum Ratings didn't have the max junction temperature information also. Can I use Tj max is 150deg.C for it? Best regards, Albert Lee." + }, { + "contentId" : "3324736", + "userName" : "Mamadou Diallo", + "rankPoints" : "7305", + "rankName" : "Expert", + "date" : "Apr 22, 2020 5:42 PM", + "userId" : "4708570", + "content" : "Albert, Please use 150C for max junction temperature. Regards, -Mamadou" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC27511" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898720.json b/data/json/DLP/898720.json new file mode 100644 index 0000000000000000000000000000000000000000..29cde3d472f7c22d2fe3bc93c540424044313a4a --- /dev/null +++ b/data/json/DLP/898720.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898720", + "reporterName" : "Tak", + "rankPoints" : "150", + "resolutionStatus" : "Resolved", + "ticketName" : "UCC28780: Tips on transformer design", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: UCC28780 To all concerned I would like some advice on the transformer design when using the UCC28780. For high frequency switching (over 400kHz), we are thinking of using RM8 (corresponding to material N49) as the core. In fact, the ON Semiconductor NCP1568 application note recommends N49 (or ML29D) and shape is RM8. (I think the UCC28780 and NCP1568 are competing devices) However, there is one question. Both your evaluation board (UCC28780) and NCP1568 evaluation board directly take out the wire on the secondary side without using a bobbin. Why are you directly using the wire without using the bobbin? Is it because it cannot be cleared from the viewpoint of safety standards? Or is there another reason? Due to the small size of the core, it makes sense to use triple insulated litz wire. Please tell me any other useful tips for transformer design. Also, I will get all the pins from the bobbin. Do you need shielded wires? Considering Lp = 40uH, I feel that Ls = 3uH has a slightly larger leakage inductance. Is sandwich winding recommended? For now, I would like to use RM8 or EER25.　　 (200W / 32V / 85V to 276V, single output) B.R. Tak", + "partNumber" : " UCC28780", + "allResponseList" : [ { + "contentId" : "3322954", + "userName" : "Hong Huang", + "rankPoints" : "18085", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 2:38 PM", + "userId" : "616779", + "content" : "The secondary output with flying leads is mainly with consideration of size. If you are ok on size, it is no problem to put the secondary leads on bobbin. On transformer design in switching mode applications, can you find a book to read? There are also many articles. You find these tricks over there. There is no shortcut to handle the tricks with a few points. So please just go ahead to study a book as well as other published articles." + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC28780" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898723.json b/data/json/DLP/898723.json new file mode 100644 index 0000000000000000000000000000000000000000..55e1fdb3513b91bf7eb738217dbffc9004cd345c --- /dev/null +++ b/data/json/DLP/898723.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898723", + "reporterName" : "Damith Pavithra", + "rankPoints" : "710", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC28704: About encrypted models", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 21", + "queryText" : "Part Number: UCC28704 Hello I was searching for a flyback controllar which have a spice model or something for simulation purpose. I found the device ucc28704 which have a pspice model. But when im going to import the model into TINA TI, it said \"invalid device\" at this line $CDNENCSTART. When i searched for that, i found that the \"$CDNENCSTART\" line has something to do with encryption. So. Is this means i cant use this in TINA TI.? Who make these models?. Can anyone give a TINAcompany model for this device. OR Can anyone suggest a PSR FLYBACK controller which have TINAcompany model. Thank you", + "partNumber" : " UCC28704", + "allResponseList" : [ { + "contentId" : "3322924", + "userName" : "Hong Huang", + "rankPoints" : "18085", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 2:19 PM", + "userId" : "616779", + "content" : "PSR flyback controller with TINA-TI model examples include UCC28700 and UCC28710." + }, { + "contentId" : "3323740", + "userName" : "Damith Pavithra", + "rankPoints" : "710", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 3:44 AM", + "userId" : "5328582", + "content" : "Thanks for the information There were several reference designs in those device pages. But when i click the design document link under KEY DOCUMENT heading, it downloads a document called test report which have nothing but test graphs. Full design detail document is nowhere to be found. For example /tool/PMP30428 Why is that happens. Where can i download the detailed design document." + }, { + "contentId" : "3324481", + "userName" : "Hong Huang", + "rankPoints" : "18085", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 3:11 PM", + "userId" : "616779", + "content" : "All design files are there. What else do you need? If you want to make design you can use the excel design tool." + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC28704" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898724.json b/data/json/DLP/898724.json new file mode 100644 index 0000000000000000000000000000000000000000..43972d9db8fe580f36a88732c375e1e159728391 --- /dev/null +++ b/data/json/DLP/898724.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898724", + "reporterName" : "NOBUO FUJIHARA", + "rankPoints" : "5125", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS62150A-Q1: Question about UVLO", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 11", + "queryText" : "Part Number: TPS62150A-Q1 Hi team, My customer asked question about UVLO. Q.1) In Table.2, it describes \"0.7 V < VIN < VUVLO\". Does \"0.7V\" meand 0.7xVin, or simply 0.7V? Q.2) Customer want to toggle PG when Vin goes down to 6V. Is it possible to control PG threshold as required? Best regards,", + "partNumber" : " TPS62150A-Q1", + "allResponseList" : [ { + "contentId" : "3322862", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Apr 21, 2020 1:41 PM", + "userId" : "24596", + "content" : "Fujihara-san, A.1) 0.7 V means 0.7 V (dc voltage) A.2) The power good function senses the output voltage, not the input voltage. You will need a separate supervisor circuit to monitor VIN." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS62150A_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898732.json b/data/json/DLP/898732.json new file mode 100644 index 0000000000000000000000000000000000000000..bfbaebe0aeb14f56d1ece7746368c597a59a3eba --- /dev/null +++ b/data/json/DLP/898732.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898732", + "reporterName" : "Enrico Carmisin", + "rankPoints" : "15", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ78350-R1: R1 to R2 device programming for production", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: BQ78350-R1 I have the same problem as other users, I have to automate programing srec to update the R1 using the R2 firmware. Is the protocol for programming device firmware documented anyway? While it can be done from BQ studio I'd like to have this fully automated by our production test software. Is there a way to interact with BQ studio and EV2400 without operator intervention? This would be useful to automate loading defualt BQ78350 configuration and calibration data. Thanks for help, E. Carmisin", + "partNumber" : " BQ78350-R1", + "allResponseList" : [ { + "contentId" : "3323150", + "userName" : "Matt Sunna", + "rankPoints" : "24930", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 4:36 PM", + "userId" : "269312", + "content" : "Hi Enrico, I have some example code I can share with you for loading an srec file for this device. There is also an updater tool I can share that may be easier if you can call it from your production software. Send me a private message and I can share both software options with you. Thanks, Matt" + } ], + "tags" : [ "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2b%2bBQstudio", "/support/power-management/f/196/tags/_2300_%2bBQ78350_2D00_R1", "/support/power-management/f/196/tags/bq78350", "/support/power-management/f/196/tags/BQ78350_2D00_R1", "/support/power-management/f/196/tags/EV2400" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898734.json b/data/json/DLP/898734.json new file mode 100644 index 0000000000000000000000000000000000000000..a4caa0ad9f0eb75797a13a3f6e5cfd7818138076 --- /dev/null +++ b/data/json/DLP/898734.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "898734", + "reporterName" : "Dan1", + "rankPoints" : "520", + "resolutionStatus" : "", + "ticketName" : "LM3017: Boost converter with True Shutdown used as High Side Switch", + "rankName" : "Intellectual", + "replies" : " 4", + "views" : " 39", + "queryText" : "Part Number: LM3017 Hi, Can LM3017 be used as a high side switch with True Shutdown? In our application, we really need to minimise shutdown current and keep it in the nanoamp range. My thoughts are as follows. Remove L1 and D1 (from the typical application circuit). Keep Enable ≤ 0.4V for shutdown mode. Keep Enable ≥ 2.6 V for passthrough mode. But What should we do with the Feedback pin? How can we disable current limiting so that this high side switch can work with a high current power FET (N-channel) ? Or can we trick it into never seeing overcurrent? Will any of the above have a negative effect on shutdown and operating/quiescent current? The 40nA shutdown current is far too good to pass up. However, the 1µA maximum is enough to rule it out. Can you please tell me what factors could cause LM3017 to go from 40nA to 1µA in shutdown so that we can evaluate where it would mostly sit? Please know that I'm still going to continue my other thread about high side switches because something better may still come from it. If I'm wrong about how LM3017 works then I don't want to derail that thread since I still need help. /support/power-management/f/196/t/895959", + "partNumber" : " LM3017", + "allResponseList" : [ { + "contentId" : "3322633", + "userName" : "Jasper Li", + "rankPoints" : "37445", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 10:38 AM", + "userId" : "3706612", + "content" : "Hi Dan, what is the voltage range the VIN? could you just use a P-MOSFET instead of the LM3017?" + }, { + "contentId" : "3322969", + "userName" : "Dan1", + "rankPoints" : "520", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 2:45 PM", + "userId" : "6255688", + "content" : "Hi Jasper, V(in) = V(out) = between 9V-14V V(logic/enable) = 3.3V We have a 100A N-channel MOSFET in the BOM so we were hoping to use that with LM3017 as the gate driver. Either way, the problem is with the shutdown current of actual gate drivers. Below 500nA is ideal and above 1μA is too much. The LM3017 boost converter has a typical shutdown current of 40nA. Although, the confusing part is that the characteristics table says it's 25nA. As for operating current, we are considering up to 1mA. Or 10mA as a last resort. Microamps would be better. Kind regards," + }, { + "contentId" : "3323984", + "userName" : "Zack Liu", + "rankPoints" : "12485", + "rankName" : "Genius", + "date" : "Apr 22, 2020 8:39 AM", + "userId" : "4961181", + "content" : "Hi Dan, I could use the EVM to run a bench test to see if this device works as a load switch controller. It may take some days because I'm applying the EVM fromcompany store. Meanwhile, I can ask somebody why the shutdown current maximum spec is up to 1uA." + }, { + "contentId" : "3325015", + "userName" : "Dan1", + "rankPoints" : "520", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 12:16 AM", + "userId" : "6255688", + "content" : "Hi Zack, Both of those things would be incredibly helpful. Thank you so much! Kind regards," + } ], + "tags" : [ "/support/power-management/f/196/tags/True%2bshutdown", "/support/power-management/f/196/tags/High_2D00_Side", "/support/power-management/f/196/tags/high%2bside%2bswitch", "/support/power-management/f/196/tags/High%2bCurrent", "/support/power-management/f/196/tags/battery", "/support/power-management/f/196/tags/nanoamp", "/support/power-management/f/196/tags/LM3017", "/support/power-management/f/196/tags/power%2bfet" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898735.json b/data/json/DLP/898735.json new file mode 100644 index 0000000000000000000000000000000000000000..d9d78ed1c0a5ad8d9251fbd42958348717d83c98 --- /dev/null +++ b/data/json/DLP/898735.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "898735", + "reporterName" : "Neal Zhu", + "rankPoints" : "990", + "resolutionStatus" : "", + "ticketName" : "AWR1642: two antennas are transmitted separately", + "rankName" : "Intellectual", + "replies" : " 6", + "views" : " 47", + "queryText" : "Part Number: AWR1642 Hi， At 2T (the two antennas are transmitted separately), this situation will occur in the Angle test, as shown in the figure below， What could be the reason？ At 1T (1 antenna is transmitted in time), the Angle test will not be a problem, as shown in the following figure", + "partNumber" : " AWR1642", + "allResponseList" : [ { + "contentId" : "3322575", + "userName" : "Vivek Dham", + "rankPoints" : "30420", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 9:32 AM", + "userId" : "333578", + "content" : "Hello Neal, This could occur if there is a phase mismatch between the two transmitters. That would need to be corrected for. If you keep an strong object at exactly zero deg (right in front of the radar) the phase of the signal from both the Tx should be the same. If there is a mismatch there would be a phase difference and you need to correct for this phase error in your angle estimation. regards, Vivek" + }, { + "contentId" : "3326869", + "userName" : "Neal Zhu", + "rankPoints" : "990", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 9:43 AM", + "userId" : "5946274", + "content" : "Hi Yes,phase mismatch,At 2T (the two antennas are transmitted separately), Phase at the beginning OK, a few minutes later, phase mismatch, what could be the reason? We can't find the reason for the phase mismatch, please help? Thanks!" + }, { + "contentId" : "3326998", + "userName" : "Vivek Dham", + "rankPoints" : "30420", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 12:43 PM", + "userId" : "333578", + "content" : "Hello Neal, Which SDK version are you using ? Regards, Vivek" + }, { + "contentId" : "3327729", + "userName" : "Neal Zhu", + "rankPoints" : "990", + "rankName" : "Intellectual", + "date" : "Apr 25, 2020 2:08 AM", + "userId" : "5946274", + "content" : "Hi， SDK version 2.0.0.4 Thanks！" + }, { + "contentId" : "3328346", + "userName" : "Vivek Dham", + "rankPoints" : "30420", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 6:20 AM", + "userId" : "333578", + "content" : "If I understood correctly in the start of the sensor the angle estimation is good but when you start changing the temperature the angle estimation goes bad? For the angle estimation are you processing the data across multiple frames or are you using only one frame? Regards, Vivek" + }, { + "contentId" : "3328759", + "userName" : "Neal Zhu", + "rankPoints" : "990", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 1:15 PM", + "userId" : "5946274", + "content" : "Hi, It doesn't have anything to do with temperature, it happens at any temperature, angle estimation are using only one frame. Thanks!" + } ], + "tags" : [ "/support/sensors/f/1023/tags/AWR1642" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898737.json b/data/json/DLP/898737.json new file mode 100644 index 0000000000000000000000000000000000000000..4e5be3126c96a8ec1e7b12ea5dba1fb5813e201c --- /dev/null +++ b/data/json/DLP/898737.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898737", + "reporterName" : "Christopher Hay", + "rankPoints" : "10", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ25895MEVM-664: BQ25895 Vs BQ25895", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 9", + "queryText" : "Part Number: BQ25895MEVM-664 What is the difference between the BQ25895 and BQ25895M. the data sheets appear identical apart from some minor places. What have i missed ? Also the Eval kits BQ25895MEVM-664 seem interchangeable BQ25895EVM-664 (If the BQ25895 or BQ25895M function is the same). Regards Chris", + "partNumber" : " BQ25895MEVM-664", + "allResponseList" : [ { + "contentId" : "3323037", + "userName" : "Jeff F", + "rankPoints" : "88360", + "rankName" : "Guru", + "date" : "Apr 21, 2020 3:23 PM", + "userId" : "8433", + "content" : "Christoper, The key difference is 895M default constant voltage is 4.35V while 895 default constant voltage is 4.2V. Regards, Jeff" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25895", "/support/power-management/f/196/tags/BQ25895MEVM_2D00_664", "/support/power-management/f/196/tags/BQ25895EVM_2D00_664", "/support/power-management/f/196/tags/BQ25895M" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898738.json b/data/json/DLP/898738.json new file mode 100644 index 0000000000000000000000000000000000000000..32a64fa05a1ff6e19f4b5ba5b0cffbe0bbbb4acf --- /dev/null +++ b/data/json/DLP/898738.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "898738", + "reporterName" : "Navin Kumar2", + "rankPoints" : "200", + "resolutionStatus" : "", + "ticketName" : "UCC2897A: Unstable output at higher load", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 26", + "queryText" : "Part Number: UCC2897A I am using UCC2897A control chip for converting 80-120 V input to 12V output, and a maximum load of 25A. My schematic diagram is shown below: - My output is going unstable when I am loading 12A at 120V or 15A at 100V. This is happening because the SS_SD pin is discharging and charging as shown below. (Green is the SS_SD voltage and Blue one is the output) I am not able to understand why my SS_sd pin is even discharging when VDD pin is stable at 12.8V, Vref is stable at 5V. LINEOV is also in the limit. This is happening at different load condition at different input. (120V input and 12A output or 100V input and 15A output). Please suggest us with probable reasons for this.", + "partNumber" : " UCC2897A", + "allResponseList" : [ { + "contentId" : "3322564", + "userName" : "John Griffin1", + "rankPoints" : "32175", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 9:24 AM", + "userId" : "1693693", + "content" : "Have you looked at the CS signal ? Regards John" + }, { + "contentId" : "3323795", + "userName" : "Navin Kumar2", + "rankPoints" : "200", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 5:29 AM", + "userId" : "6125865", + "content" : "Hi John! I have looked at the CS signal as well at two different sense resistors. Below are the voltage signals for two 17.5mohm and 35mohm sense resistors respectively. None of them is exceeding the limit." + }, { + "contentId" : "3324575", + "userName" : "John Griffin1", + "rankPoints" : "32175", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 3:57 PM", + "userId" : "1693693", + "content" : "Hi Navin, It looks like you have excessive switching noise on the CS input and this may be triggering an overcurrent Please make sure the filter cap on CS is placed directly across pin 8 and pin 9. This should eliminate any switching noise interference Regards John" + }, { + "contentId" : "3327003", + "userName" : "Navin Kumar2", + "rankPoints" : "200", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 12:48 PM", + "userId" : "6125865", + "content" : "Hello John, CS pin is controlling the current by cycle by cycle current limit or by hiccup mode. But in the Functional block diagram of the control chip, the voltage at the CS pin is not responsible for the discharge of the capacitor at the SS/SD pin. Am I correct? If I am correct, then what could be the reason for the discharge of capacitor at SS/SD pin?" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC2897A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898739.json b/data/json/DLP/898739.json new file mode 100644 index 0000000000000000000000000000000000000000..cc28d9aadf1d1b622b0142b60e116c4e88f3981f --- /dev/null +++ b/data/json/DLP/898739.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898739", + "reporterName" : "teritama", + "rankPoints" : "360", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS3808: About delay time with CT pin @TPS3808", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 9", + "queryText" : "Part Number: TPS3808 Hi team. Our customer use this device setting 10s delay with CT pin. In datasheet, RESET delay time is 0.7s~1.7s at typ 1.2s.(About ±40% error) Do you think there will be a similar error for 10s? Best regards teritama.", + "partNumber" : " TPS3808", + "allResponseList" : [ { + "contentId" : "3323436", + "userName" : "Michael_DeSando", + "rankPoints" : "12320", + "rankName" : "Genius", + "date" : "Apr 21, 2020 8:40 PM", + "userId" : "3482499", + "content" : "Teritama, In Section 8.3.2 of the datasheet, the recommended program time is between 1.25 ms and 10 seconds so I believe the 10 second delay will have similar error. The important note is the type of capacitor used. Note that a low-leakage type capacitor such as a ceramic should be used, and that stray capacitance around this pin may cause errors in the reset delay time. If the capacitor has error tolerance or parasitic leakage, this adds to the reset delay error." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS3808" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898746.json b/data/json/DLP/898746.json new file mode 100644 index 0000000000000000000000000000000000000000..0a01c7c3d31474beffeecc9c305c29268ee15800 --- /dev/null +++ b/data/json/DLP/898746.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898746", + "reporterName" : "Soeren Juul", + "rankPoints" : "10", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC5390ECDWVEVM: Current consumption of the UVLO pin (GND2)", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 15", + "queryText" : "Part Number: UCC5390ECDWVEVM Hi TI. I am currently working on a split power supply for a gatedrive, but I need to know how much current that will flow out/in of the GND2 pin of the UCC5390ECDWV. Please also take max temperature into account. Thank you!", + "partNumber" : " UCC5390ECDWVEVM", + "allResponseList" : [ { + "contentId" : "3322763", + "userName" : "Don Dapkus", + "rankPoints" : "174575", + "rankName" : "Guru", + "date" : "Apr 21, 2020 12:52 PM", + "userId" : "1027", + "content" : "Hi, Soren, Welcome to e2e, and thanks for your interest in our products! For the UCC5390E GND2 pin, as you noted, it is used as a reference for the UVLO circuitry to accommodate split-supply operation. Since it is used as a sensing reference, very little current will flow in/out of it. We don't specify this, but you can assume it will be on the order of tens of microamps if used as shown in in Figure 4 of the users guide. NOTE: R2 is zero ohms, and R3 is open, thus tying the GND2 pin to ground as shown in Table 1. Let us know if you have further questions." + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC5390ECDWVEVM" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898752.json b/data/json/DLP/898752.json new file mode 100644 index 0000000000000000000000000000000000000000..c0b15b336d8414cbd48c8adbab5075a095b4b728 --- /dev/null +++ b/data/json/DLP/898752.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898752", + "reporterName" : "Gary DeWitt", + "rankPoints" : "30", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ24210: Use of Two Solar Panels and USB Like Input", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 43", + "queryText" : "Part Number: BQ24210 Hello, I am using the BQ24210 as a charging circuit for a 5000 mAH battery in my application using 2 solar panels and/or a USB type input as the power source. I utilized the BQ24210EVM to develop my application and it is working well. The three inputs each feed into the VBUS through a Schottky diode (3 diodes). The only jumpers I have set on the EVM board are JP4 (LPCM) closed and JP1 (iSET to 500 mA) closed. One primary objective is to have the current coming in from the solar panels be additive. That is, due to sun angles, if one solar panel is exposed to produce 150 mA of charge current out of the BAT output and the other panel is exposed to produce 50 mA at the BAT output, the total charge current will add up to 200 mA for the battery charge current. Using this approach works fine with using the BQ24210EVM prototyping board in my large prototype of the system. I can place one panel in full sun and the other covered and get 150 mA of charge. Covering the first panel and exposing the second panel also produces the expected 150 mA of charge. Exposing both at the same time produces the desired 300 mA of charge to the battery. The EVM circuit was duplicated (without all of the extra option components) on a PCB with the connections the same as if the JP1 and JP4 connections are closed. During test, the input of each panel works fine but they are not additive. Whichever panel has the larger current drives the output BAT current. Using the example above, illuminating one panel at a time results in each producing 150 mA on its own but with both exposed the output is still only 150 mA. Here is an extract from my PCB schematic. The large blue lines were added during debug. The one marked 1 goes to an ADC to determine input current value and the /EN input comes from the output of a GPIO pin on a processor. The USB like input is from a 12V input stepped down through a 5 volt regulator - this is not connected during the above testing. However, it was previously tested without the panels exposed to sunlight and the charge current varies based on charge level of the battery during the life cycle of the LPCM type charge. LPCM was chosen since we are only interested in trickle type charging from the solar panels and 12v input. Do I need to set a bias on VDPM or the TS/VTSB inputs?", + "partNumber" : " BQ24210", + "allResponseList" : [ { + "contentId" : "3323277", + "userName" : "Nick Brylski", + "rankPoints" : "340", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 6:21 PM", + "userId" : "5338371", + "content" : "Hi Gary, This is most likely due to issues with ORing of the diodes. See section 3 of this document explains what is happening. \"Forward voltage drop of the schottky diode has a negative temperature co-efficient and it reduces with increasing temperature. This can lead to situation where a single supply carries the entire load current though second supply is still present and results in increased junction temperature TJ .\" Section 8 of document explains how this issue can be resolved by using an ideal diode controller like LM74700-Q1 instead of normal shottky diode. Best," + }, { + "contentId" : "3325784", + "userName" : "Gary DeWitt", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 2:57 PM", + "userId" : "3973458", + "content" : "Hi Nick, Thank you very much for the rapid response - it was a pleasant surprise after some of the experiences I have had with other Forums. I followed up with your suggestion and reviewed the LM74700-Q1. That was a fairly complex change to add for each input. I further investigated the documentation on both the BQ24210 device and the associated EVM. I found a note hidden in a cell of a row in one of the tables that VBUS expects both a 10 uF and 0.1 uF capacitor at the VBUS input (no explanation of why). Even though I doubted that would work, I tacked those devices onto the PCB and the function is now working as desired (the inputs are additive in current flow). Again, I appreciate your support and will get back to you if there are any other questions. Best regards, Gary DeWitt" + }, { + "contentId" : "3326163", + "userName" : "Nick Brylski", + "rankPoints" : "340", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 7:19 PM", + "userId" : "5338371", + "content" : "Hi Gary, The 0.1 uF cap is for high frequency noise filtering. It is optional and will depend on noise coming from source and noise requirement of load. Best," + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24210", "/support/power-management/f/196/tags/BQ24210%2b%2b%2bSolarPanel" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898755.json b/data/json/DLP/898755.json new file mode 100644 index 0000000000000000000000000000000000000000..06cadecad802ed82600209fe8ed5cd97d94ec17e --- /dev/null +++ b/data/json/DLP/898755.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898755", + "reporterName" : "KevinMEL", + "rankPoints" : "50", + "resolutionStatus" : "Resolved", + "ticketName" : "How to measure Loop Gain and Phase of switching power supply", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 29", + "queryText" : "Hello, I have read the Application Report \"Optimizing Transient Response of Internally Compensated dc-dc Converters With Feedforward Capacitor\" SLVA289B to measure and optimize the phase margin of my design. In section 2.3 \"Determining the Crossover Frequency Using Frequency Analysis\" How the loop Gain and Phase are measured ? The only solution is the FRA technique ? Best Regard's,", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3323302", + "userName" : "Garrett Roecker", + "rankPoints" : "18240", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 6:46 PM", + "userId" : "3456925", + "content" : "Hi KevinMEL Thanks for reaching out with your questions. Using a frequency response analyzer is the easiest way to measure the loop. However if there you don't have access to this piece of equipment a function generator, oscilloscope and transformer can be used to measure the loop. Please take a look at this application note to help implement the measurements. -Garrett" + }, { + "contentId" : "3323305", + "userName" : "Youhao Xi", + "rankPoints" : "39085", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 6:47 PM", + "userId" : "1880260", + "content" : "Hi Kevin, Basically you need a frequency response analyzer to measure the Bode Plots. There are many vendors producing the analyzer, including Keysight, Venable and Ridley, different vendors but the method is the same. For your reference, you can read the article at the below link for the loop measurement. http://www.ridleyengineering.com/hardware/ap310-analyzer/ap300-application/ap300-measurement-techniques.html Another method, which is for experienced engineer without an frequency response analyzer, is presented in the article below. /lit/an/snva364a/snva364a.pdf Thanks, Youhao Xi, Applications Engineer" + }, { + "contentId" : "3323779", + "userName" : "KevinMEL", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 4:53 AM", + "userId" : "4854786", + "content" : "Hello, Thank you for your useful informations Best Regard's," + } ], + "tags" : [ ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898756.json b/data/json/DLP/898756.json new file mode 100644 index 0000000000000000000000000000000000000000..465e5386965fc3446625c18d4023d3860c684341 --- /dev/null +++ b/data/json/DLP/898756.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "898756", + "reporterName" : "Kerem Oktem", + "rankPoints" : "240", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ76PL455A: Battery Charger System with Offline Power Supply", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 17", + "queryText" : "Part Number: BQ76PL455A I am trying to design a system for charging a Battery Pack. The batttery pack consists of ~75 cells of AgZnO chemistry cells, whose voltage is 2.1V when FULL and 0V when EMPTY. The battery pack shall be charged with CONSTANT CURRENT using a dedicated battery charger with either 10A or 5A according to the avarage cell voltages. The battery charge current is controlled using RS232. The Battery charger is only activated when charging is required. I am considering usingcompany battery monitors BQ76PL455A, BQ76940. For the control of battery charging I shall use MSP432 with ETHERNET control interface. The control interface shall ALWAYS be ON. I need to know ONLY the voltage of each cell. The battery pack shall be replacable and I want to be able to measure even when the cells are EMPTY (0 Volts). I am confused about the power supply input of these BMS ICs. The 'TOP' pin is shown in the datasheets, should be conntected the most positive voltage in each battery pack within the BMS. My interpretation of this is that, when the cells are totally EMPTY and the charger is not activated, not POWERED, I can not measure the cell voltages because the TOP pin voltage is 0V. I want to be able to measure the cell voltages while charging and while not charging when the charger is OFF. Is there a way to power the stacked BMS with an external supply? In section 6.3 it is stated Vtop could be between 12V and 79.2V. But Vsense16 = TOP. To my understanding means that supply of the BMS is again the battery pack. Again if the batteries are EMPTY or there are NO INSTALLED batteries I can not see 0V or that there are no batteries. I am attaching a block diagram of the system I am considering. I would be glad if you could help me. Kind Regards", + "partNumber" : " BQ76PL455A", + "allResponseList" : [ { + "contentId" : "3323055", + "userName" : "Taylor Vogt", + "rankPoints" : "6625", + "rankName" : "Expert", + "date" : "Apr 21, 2020 3:29 PM", + "userId" : "4375069", + "content" : "Hi Kerem, It is possible to power using an external supply although that is not typical use and how we tested so there can be situations to watch out for like in below question: /support/power-management/f/196/t/852651?tisearch=e2e-sitesearch&keymatch=bq76pl455a%25252525252520external%25252525252520supply Another point to keep in mind is that the Vmin of the input cell voltages is 1V so when the cells go below that you may not have good measurements. Typically we work with LI-ion solutions that are 3.7V nominal. Regards, Taylor" + }, { + "contentId" : "3324028", + "userName" : "Kerem Oktem", + "rankPoints" : "240", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 9:31 AM", + "userId" : "657539", + "content" : "thank you so much for your reply. This IC would not be suitable for my applications unfortunately" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ76940", "/support/power-management/f/196/tags/BQ76PL455A", "/support/power-management/f/196/tags/BMS", "/support/power-management/f/196/tags/Battery%2bManagement%2bSytem" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898758.json b/data/json/DLP/898758.json new file mode 100644 index 0000000000000000000000000000000000000000..bce7688cae3c6e12d90fdbfc3b56676fbabd58ca --- /dev/null +++ b/data/json/DLP/898758.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "898758", + "reporterName" : "Shota Mago", + "rankPoints" : "2355", + "resolutionStatus" : "Resolved", + "ticketName" : "TLC5947: Max # of multiple devices", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 27", + "queryText" : "Part Number: TLC5947 Hi team, My customer considers to use 10pcs of TLC5947. Figure.23 shows that the device can be connected by daisy chain. How many devices can be connected and what is factor of the limitation? I'm looking forward to hearing back from you. Best regards, Shota Mago", + "partNumber" : " TLC5947", + "allResponseList" : [ { + "contentId" : "3322593", + "userName" : "Shota Mago", + "rankPoints" : "2355", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 9:48 AM", + "userId" : "4957008", + "content" : "Hi Hardy, Thanks for your quick response and answer! Best regards, Shoat Mago" + }, { + "contentId" : "3322615", + "userName" : "Hardy Wu", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 10:11 AM", + "userId" : "4961195", + "content" : "Hi Shota, Sorry that I deleted the reply by mistake, so I re-post it again. In theory the cascade number should be infinite. But due to the limitation of data transmission speed, the display may have synchronous issue between beginning ICs with end ICs, in large amounts applications. It was limited by customer's MCU GPIO speed. I think 10pcs is totally OK." + } ], + "tags" : [ "/support/power-management/f/196/tags/TLC5947" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898759.json b/data/json/DLP/898759.json new file mode 100644 index 0000000000000000000000000000000000000000..7f0067bcfaf4bfe42665cbee42eb21cec451195d --- /dev/null +++ b/data/json/DLP/898759.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "898759", + "reporterName" : "Bhanuprakash Nayak51", + "rankPoints" : "70", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LMG3410R050: GaN VDS minimum required", + "rankName" : "Prodigy", + "replies" : " 5", + "views" : " 31", + "queryText" : "Part Number: LMG3410R050 What is the minimum VDS in which GaN can operate ? We will have voltage of around 0.75V to 1.5V on the drain terminal. What is the max Drain to source current I can drive from LMG3410R050 GaN device ? Regards, Bhanuprakash Nayak", + "partNumber" : " LMG3410R050", + "allResponseList" : [ { + "contentId" : "3323393", + "userName" : "Yichi Zhang.", + "rankPoints" : "870", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 7:50 PM", + "userId" : "5338385", + "content" : "Hi Bhanuprakash Thanks for contacting us. For our device there is no minimum VDS requirement. However, I think it is an overkill to use our 600V device on this application. As for the maximum Ids, if it is the DC current, then it should be lower than 12A for long time operation. During transient, the current can go to 27A assuming junction temperature of 100 degree. Also it can withstand current up to 130A if the pulse is <1us. If it is AC current, then the 12V limit will be applied to the average current. As for the RMS current, the thermal is limiting factor, and the max current should be under the 27A as well. May I know what the application is for and why are you considering GaN here (what are the benefits you are trying to get out of it)? Thanks! Regards," + }, { + "contentId" : "3323596", + "userName" : "Bhanuprakash Nayak51", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 12:44 AM", + "userId" : "4454848", + "content" : "Thank a lot for your quick response Yichi. We are planning to design a new tool which can validate the our mother boards Voltage regulators. We sink current through this GaN to emulate the processor behavior. So that platform VRs can be validated. We will have VDD of around 0.75V to 1.5V and current of around 220A max. We can consider doing parallelization here. What's the resolution I can achieve with this GaN, let's say if I am planning to drive 1A to 1.005A. Can this small step be achieved ? Prime reason of considering GaN is that we need very high rise time requirement, more current and lesser real estate. Thanks and Regards, Bhanuprakash Nayak" + }, { + "contentId" : "3324809", + "userName" : "Yichi Zhang.", + "rankPoints" : "870", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 7:00 PM", + "userId" : "5338385", + "content" : "Hello Bhanuprakash, Is the current going to be just one short pulse? How long the 220A current will last per pulse? Yes 1A to 1.005A is achievable. I think that has more to do how you control your supply, since once GaN is on, it can drive whatever current go through it. For our GaN, we can achieve around 100V/ns slew rate. What is your rise time requirement? Also I am not sure about the more current and lesser real estate statements here. Can you elaborate on those? Regards," + }, { + "contentId" : "3325221", + "userName" : "Bhanuprakash Nayak51", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 4:56 AM", + "userId" : "4454848", + "content" : "Hi Yichi, It is not going to be a short pulse. This is the continues current. We also have pulsed current requirement but my understanding is that GaN can very well manage that. When you siad \"Yes 1A to 1.005A is achievable. I think that has more to do how you control your supply\", Do you mean all the current flown along from Drain to Source is solely dependent on the Gate Drive and not on what voltage the VDD is tied to ? 100V/ns is more than sufficient for our design. We are currently using MOSFETs now and it takes more area and current limit is lesser. And we use OP-AMPs to drive the gate of the FET. In the SOA graph the spec is defined upto 600V and lower voltage values are not very clear. My understanding is that VDS solely depends on the current flown across the RDS-ON. Then how can one reach 600V across VDS ? We will have aroudn 1V connected to VDD, Gate will be driven by OP-AMP, Can I drive 12A continues current ? Thanks and Regards, Bhanuprakash Nayak" + }, { + "contentId" : "3326185", + "userName" : "Yichi Zhang.", + "rankPoints" : "870", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 7:53 PM", + "userId" : "5338385", + "content" : "Hello Bhanuprakash, We usually refer Vdd as supply voltage for GaN device. When you say Vdd, you meant the bus voltage applied to the drain right? The 600V (should be under 480V according to SOA for safe operation) Vds datasheet is referring to is the voltage across the device when the GaN is off. This is the maximum voltage you can apply the bus voltage across the GaN device for it to hold off. While device is on, the Vds will be Rdson*Ids. Say your bus voltage is 1.5V, and the current is 1A, then while device is on, the voltage at the source of the GaN will be 1.5-1*0.05=1.45V. Again, amount of current you are supplying depends on your application. Also 12A continuous current is okay. Regards," + } ], + "tags" : [ "/support/power-management/f/196/tags/lmg3410r050" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898767.json b/data/json/DLP/898767.json new file mode 100644 index 0000000000000000000000000000000000000000..dcc5e2a3a0988addb2eea45fea14ef7dfb260981 --- /dev/null +++ b/data/json/DLP/898767.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "898767", + "reporterName" : "Holger Zinke", + "rankPoints" : "30", + "resolutionStatus" : "", + "ticketName" : "TPS63061: Fault - no output voltage and death of TPS63061", + "rankName" : "Prodigy", + "replies" : " 5", + "views" : " 29", + "queryText" : "Part Number: TPS63061 Hi Support Team, we have a few faults (no output voltage + death) of TPS63061 in the schematic below. Do you have any reference of failure cause or suggestion to optimize the curcuit? Thank you", + "partNumber" : " TPS63061", + "allResponseList" : [ { + "contentId" : "3323555", + "userName" : "Milos", + "rankPoints" : "7260", + "rankName" : "Expert", + "date" : "Apr 21, 2020 11:26 PM", + "userId" : "5692358", + "content" : "Hi Holger, Thank you for reaching out. Could you please give us more details about the failed devices: Did the failed devices never manage to start, or did they failed after some time operating under certain (which?) conditions? Can you please share your PCB layout? If this is sensitive you can send it to me in a private message. Best regards, Milos" + }, { + "contentId" : "3323977", + "userName" : "Holger Zinke", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 8:30 AM", + "userId" : "5324784", + "content" : "Hi Milos, thank you for fast reply. 1. The faulty devices work well for a few month. Most of them has no Problem any time. But some are faulty. At some ICs you can see a \"blowhole\" on the housing The detailed condition at the time of failure is unclear. The Input voltage is normally 4,8V (battery Operation 4x1,2 NiMH) or operation with a external power supply with 9,0V. 2. PCB Layout: Best regards, Holger" + }, { + "contentId" : "3324125", + "userName" : "Milos", + "rankPoints" : "7260", + "rankName" : "Expert", + "date" : "Apr 22, 2020 11:27 AM", + "userId" : "5692358", + "content" : "Hi Holger, Thank you for the additional info. It is difficult to pinpoint the problem since the device worked for some time before failing. My guess would be either overvoltage or overtemperature induced failure. I overlooked that on the schematic you have only around 2 μF on the input side. We recommend at least 20 μF. It is important to have enough capacitance to support switching pulses, and it also helps for point 1 below. How far is the input power supply (the batteries or the external 9 V) for the TPS63061? If the device turns off due to overtemperature, it could create a voltage spike due to parasitic inductance on the input side if the line from the batteries to the TPS63061 is long. If the input supply is located more than 10 cm from the TPS63060, additional bulk capacitance should be added, for example a 47-100 μF electrolytic/tantalum capacitor. Can you please show us the photo of one of the blown devices so we can see which part might have failed internally? Is there a GND plane that is not shown in the above image? In general, the layout looks good, but if the device operates at high output currents, there should be more GND vias close to the device PGND pins and close to the GND ends of input/output capacitors. Please refer to the recommended PCB design below. Is there anything else connected to the input side of the TPS63061 that could be a source of voltage spikes? Best regards, Milos" + }, { + "contentId" : "3326658", + "userName" : "Holger Zinke", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 5:50 AM", + "userId" : "5324784", + "content" : "Hi Milos, thank you for the detailed statement. 1. the Input power supply is ~5cm far away from the device. There is a curcuit with fuse, inverse polarity protection, filters, capacitors (as well 220uF), 2. please find here a picture of a damaged TPS63061. Other faulty units have no visible damage. 3. All Vias are connect to the GND plane layer. (complete plane of PCB) 4. The power supply circuit from 9V input and batterie a connected to the U2 voltage. In Addition there is parallel a second power supply device for 3,3V (MCP1703T). Do you have any concluding recommendation ? If it is helpfull, i can send you the complete part from the power supply of the schematic to your private address. How can a send a private message ? Best regards, Holger" + }, { + "contentId" : "3327271", + "userName" : "Milos", + "rankPoints" : "7260", + "rankName" : "Expert", + "date" : "Apr 24, 2020 4:07 PM", + "userId" : "5692358", + "content" : "Hi Holger, The damage occurs where the buck stage is. I assume this is an overvoltage, and would like to see the schematic of the power part if possible. You can send me the files in a private message after you accept my friend request. Best regards, Milos" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS63061" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898770.json b/data/json/DLP/898770.json new file mode 100644 index 0000000000000000000000000000000000000000..9d4732c70746b4cb95dc1a1331ab3af25b671b2f --- /dev/null +++ b/data/json/DLP/898770.json @@ -0,0 +1,71 @@ +{ + "ticketNumber" : "898770", + "reporterName" : "LIN SUN", + "rankPoints" : "310", + "resolutionStatus" : "", + "ticketName" : "LM74610-Q1: T0/T1 time", + "rankName" : "Intellectual", + "replies" : " 7", + "views" : " 42", + "queryText" : "Part Number: LM74610-Q1 Dear expert: I’m using 4.7uF Vcap according to reference design. When my probe is placed at net VBAT_F, T0/T1 are 33ms/2464ms, respectively. However, according to formula1 of spec page10, T0/T1 should be 100ms/5.7s, respectively. Why my result is so different from spec calculated? BTW, When my probe is placed at net VBAT_F, and another probe is also placed at LM74610 pin 7 (VCAPH), T0/T1 are 33ms/830ms, respectively. It seems that VCAP discharge time is largely reduced due to probe. Can you share me some precious suggestions please?", + "partNumber" : " LM74610-Q1", + "allResponseList" : [ { + "contentId" : "3323285", + "userName" : "Karikalan Selvaraj", + "rankPoints" : "13870", + "rankName" : "Genius", + "date" : "Apr 21, 2020 6:26 PM", + "userId" : "1601212", + "content" : "Hi Probing VCAPH (Pin 7) with reference to GND will add leakage path for charge pump and would discharge VCAPH. This would reduce turn on time. However if VBAT_F is probed it should not reduce the turn on time so much. We will review and get back to you later this week, but is this happening on one IC or more than one IC? Regards, Kari." + }, { + "contentId" : "3324136", + "userName" : "LIN SUN", + "rankPoints" : "310", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 11:36 AM", + "userId" : "5125235", + "content" : "Dear expert Kari Two boards and three LM74610 are tested. Same results are found. Hoping for your reply and thanks!" + }, { + "contentId" : "3325427", + "userName" : "Karikalan Selvaraj", + "rankPoints" : "13870", + "rankName" : "Genius", + "date" : "Apr 23, 2020 9:06 AM", + "userId" : "1601212", + "content" : "Hi LIN SUN, We are investigating the variation observed on VBAT_F ON time and would require some time until early next week to get back on this. In the meantime, if can share the variation in 4.7uF capacitance, that will help to debug faster. Regards, Kari." + }, { + "contentId" : "3325450", + "userName" : "LIN SUN", + "rankPoints" : "310", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 9:40 AM", + "userId" : "5125235", + "content" : "Hi kari 4.7uF_±10%_25V_X5R_0603 is used, supplier P/N is CL10A475KA8NQNC and specification attached.CL10A475KA8NQNC.pdf" + }, { + "contentId" : "3327774", + "userName" : "Karikalan Selvaraj", + "rankPoints" : "13870", + "rankName" : "Genius", + "date" : "Apr 25, 2020 5:12 AM", + "userId" : "1601212", + "content" : "HI Lin, We have looked at this isssue in detail now. One reason where this can happen is due to increase in leakage current across VCAPH and VCAPL pins. Can you please remove the IC and measure the leakage across the 4.7uF capacitor (VCAPH to VCAPL) by connecting a 1V source and measuring the current through. Any leakage current of about 200nA to 300nA can cause this issue. Regards, Kari." + }, { + "contentId" : "3328326", + "userName" : "LIN SUN", + "rankPoints" : "310", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 6:01 AM", + "userId" : "5125235", + "content" : "HI KARI Leakage current cannot be measured, because my power supply has no such high precision. Can you share your experience with me please? I cannot understand it well. Thanks!" + }, { + "contentId" : "3329151", + "userName" : "Karikalan Selvaraj", + "rankPoints" : "13870", + "rankName" : "Genius", + "date" : "Apr 27, 2020 4:37 PM", + "userId" : "1601212", + "content" : "HI Can you use a power supply and ammeter(digital multimeter) in series to measure? Regards, Kari." + } ], + "tags" : [ "/support/power-management/f/196/tags/LM74610_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898773.json b/data/json/DLP/898773.json new file mode 100644 index 0000000000000000000000000000000000000000..681e56b90c71a4f3b3c8864487abedaa04d80617 --- /dev/null +++ b/data/json/DLP/898773.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898773", + "reporterName" : "user5146792", + "rankPoints" : "10", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "CSD95490Q5MC: Need full data sheet and other detailed information of CSD95490Q5MC", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 15", + "queryText" : "Part Number: CSD95490Q5MC Hello ; working for high current source and i want use CSD95490Q5MC.. Full data sheet and other detailed information of CSD95490Q5MC. How to calculate LSET resistor & inductor. What about voltage output of IOUT & TAO", + "partNumber" : " CSD95490Q5MC", + "allResponseList" : [ { + "contentId" : "3322693", + "userName" : "Brett Barr1", + "rankPoints" : "18020", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 12:14 PM", + "userId" : "1781410", + "content" : "Berat, Thank you for posting. I see you also already reached out to us on the list serve so I am going to continue this conversation offline over there." + } ], + "tags" : [ "/support/power-management/f/196/tags/Need%2bfull%2bdata%2bsheet%2band%2bother%2bdetailed%2binformation%2bof%2bCSD95490Q5MC", "/support/power-management/f/196/tags/CSD95490Q5MC" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898774.json b/data/json/DLP/898774.json new file mode 100644 index 0000000000000000000000000000000000000000..068ff1a9f861f26157d45504a995a591b5065747 --- /dev/null +++ b/data/json/DLP/898774.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "898774", + "reporterName" : "Kazuya Nakai59", + "rankPoints" : "12210", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM1085: Do you have any graph of ESR range for LM1085 like Figure 16 in AN-1148 application report?", + "rankName" : "Guru", + "replies" : " 4", + "views" : " 27", + "queryText" : "Part Number: LM1085 Hello guys, One of my customers is going to use LM1085 for their new products. At this time, they have the following questions. Could you please give my you reply? Q1. Doescompany have any graph of ESR range for LM1085 like Figure 16 in AN-1148 application report? AN-1148 /lit/an/snva020b/snva020b.pdf Q2. Doescompany have any graph of ESR range for LM1085 in 10uF, 22uF, 33uF case? Ifcompany doesn't have, could you please tell me how to calcurate ESR for each capacitance case? Your reply would be much appreciated. Best regards, Kazuya.", + "partNumber" : " LM1085", + "allResponseList" : [ { + "contentId" : "3324695", + "userName" : "Stephen Ziel", + "rankPoints" : "5640", + "rankName" : "Expert", + "date" : "Apr 22, 2020 5:15 PM", + "userId" : "6127804", + "content" : "Hi Kazuya, We don't have ESR plots for this device like Figure 16 in AN-1148 application report. Please review the following E2E post, which is very similar to your question. /support/power-management/f/196/t/895870 If after review of this post, you still need assistance, please reply and let me know. Thanks, - Stephen" + }, { + "contentId" : "3328828", + "userName" : "Kazuya Nakai59", + "rankPoints" : "12210", + "rankName" : "Guru", + "date" : "Apr 27, 2020 1:53 PM", + "userId" : "6002742", + "content" : "Hi Stephan, Thank you very much for your reply. The customer checked LM1085IS-3.3 output waveform on their own PCB with several POSCAP as the below. Cout(uF) ESR(mohm) Fzero(kHz) (@500kHz) (Fzero=1/(2pi*Cout*ESR)) CAP1: 47 41 82.6 CAP2: 33 53.3 90.5 CAP3: 22 44.1 164 CAP4: 10 48 331.6 CAP5: 5.6 66.5 427.4 As the result, CAP1 case was most stable output voltage and CAP5 was most unstable. ( Output waveform stable CAP1 > CAP2 > CAP3 > CAP4 > CAP5 unstable) In case of CAP5, the output voltage was oscilated with 100kHz and 70mVp-p at light load. In case of CAP1, the output voltage was stabled at the light load. The customer though CAP5 case is most stable because the E2E post you wrote said Fzero should be set to 500kHz for LM1085. But the customer experiment result showed CAP1 is the best for output voltage stability and CAP5 is the worst. My questions are... 1. Is 500kHz for LM1085 Fzero correct? May lower frequency than 500kHz be actual Fzero? 2. If 500kHz is not correct, what is the actual Fzero. Which frequency is recommended for LM1085 Fzero? Could you please give me your reply? Thank you again and best regards, Kazuya." + }, { + "contentId" : "3328896", + "userName" : "Stephen Ziel", + "rankPoints" : "5640", + "rankName" : "Expert", + "date" : "Apr 27, 2020 2:27 PM", + "userId" : "6127804", + "content" : "Hi Kazuya, Thank you for the detailed information and post. I need some additional information before I can fully reply to the customers concerns. Was the test at room temperature? Can the customer provide the specific manufacturing part numbers of each capacitor, as well as their output voltage? If so, we can do a review of the capacitance including bias effects, which will change the actual capacitor value. Can the customer provide an oscilloscope plot showing the condition where the linear regulator was unstable (Cap 5 with 100kHz frequency oscillation)? What load is considered light load to the customer? Thanks, - Stephen" + }, { + "contentId" : "3328948", + "userName" : "Kazuya Nakai59", + "rankPoints" : "12210", + "rankName" : "Guru", + "date" : "Apr 27, 2020 2:53 PM", + "userId" : "6002742", + "content" : "Hi Stephen, Thank you very much for the pronmpt reply. >Was the test at room temperature? >Can the customer provide the specific manufacturing part numbers of each capacitor, as well as their output voltage? Yes. The test was at room temperature and each capacitor part number is the follow. CAP1: Panasonic 10TPB47M CAP2: Panasonic 10TPB33M CAP3: Panasonic 8TPC22M CAP4: Panasonic 8TPC22M CAP5: Panasonic 25TQC5R6M >Can the customer provide an oscilloscope plot showing the condition where the linear regulator was unstable (Cap 5 with 100kHz frequency oscillation)? >What load is considered light load to the customer? The customer don't want to disclosed the waveform they took to E2E. If it is no problem, could you please tell me your e-mail address? Thank you again and best regards, Kazuya." + } ], + "tags" : [ "/support/power-management/f/196/tags/LM1085" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898776.json b/data/json/DLP/898776.json new file mode 100644 index 0000000000000000000000000000000000000000..e6b304cb60bcdf90c0ffc9e8dcc8f81b0b59f1f4 --- /dev/null +++ b/data/json/DLP/898776.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "898776", + "reporterName" : "Dan Ringger", + "rankPoints" : "1360", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "CSD19536KCS: Parameters needed not found in DS", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 16", + "queryText" : "Part Number: CSD19536KCS Hello - We are looking for these parameters and we weren't able to find them in the DS: E_on Vs I_D E_off Vs I_D V_on Vs I_on at different temperatures Various R and C values for thermal impedance and test conditions for all the above data. Thank you", + "partNumber" : " CSD19536KCS", + "allResponseList" : [ { + "contentId" : "3322833", + "userName" : "John Wallace1", + "rankPoints" : "9460", + "rankName" : "Genius", + "date" : "Apr 21, 2020 1:22 PM", + "userId" : "3502056", + "content" : "Hi Dan, Thanks for the inquiry. These are parameters that we do not spec or test for our FETs. If you can share more information about the application, I can try to help you out. If you're not comfortable sharing the details on this public forum, please send me a note on my email." + }, { + "contentId" : "3324281", + "userName" : "John Wallace1", + "rankPoints" : "9460", + "rankName" : "Genius", + "date" : "Apr 22, 2020 1:18 PM", + "userId" : "3502056", + "content" : "Hi Dan, I'm going to close out this e2e thread since we're discussing via regular email." + } ], + "tags" : [ "/support/power-management/f/196/tags/CSD19536KCS" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898778.json b/data/json/DLP/898778.json new file mode 100644 index 0000000000000000000000000000000000000000..e8a5e66128905dd0c4026d02dad952819aa5ad33 --- /dev/null +++ b/data/json/DLP/898778.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "898778", + "reporterName" : "K.Shidara", + "rankPoints" : "2025", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS65130: Vneg max current", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 15", + "queryText" : "Part Number: TPS65130 Hi Team Would you advise my customer's question of Vneg max current at Vin = 3.15V, Vout = - 6.7V? Because max current is difficult to estimate from the below graph in datasheet. Thanks Best regards, Shidara", + "partNumber" : " TPS65130", + "allResponseList" : [ { + "contentId" : "3323041", + "userName" : "Aaron Goodson", + "rankPoints" : "5630", + "rankName" : "Expert", + "date" : "Apr 21, 2020 3:23 PM", + "userId" : "4719001", + "content" : "Hi, I have notified our expert regarding this topic. Please expect a response by 4/23/20. Thanks, Aaron" + }, { + "contentId" : "3324951", + "userName" : "Liaqat Khan", + "rankPoints" : "7780", + "rankName" : "Expert", + "date" : "Apr 22, 2020 10:23 PM", + "userId" : "291526", + "content" : "Hello Shidara-san, Maximum load current is dependent on input voltage, output voltage, load current and converter efficiency. Basically, in the case of TPS65130/131 it is limited by internal switch current limit. Theoretical max current at Vin=3.15V, Vout=-6.7V should be ~160mA for TPS65130. If customer is concerned about max current margin, I would suggest to use TPS65131 instead of TPS65130 because it has a much higher internal switch current limit and hence can support much higher load current. Kind Regards, Liaqat" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS65130" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898780.json b/data/json/DLP/898780.json new file mode 100644 index 0000000000000000000000000000000000000000..541607dac4345f13e31dcce8c1873083a847fe48 --- /dev/null +++ b/data/json/DLP/898780.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "898780", + "reporterName" : "Yuto Sakai", + "rankPoints" : "5515", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS659037: Vcc slew rate and LDORTC OFF period", + "rankName" : "Genius", + "replies" : " 5", + "views" : " 24", + "queryText" : "Part Number: TPS659037 Hi, Application note (SWCA302) describes Vcc slew rate and LDOVRTC_OFF condition for POR generation. Our customers designed this application note before it was released. Therefore, they do not consider those conditions. I understand that if those conditions are not met, the POR will not generate successfully. What issue does that cause? Best regards, Yuto Sakai", + "partNumber" : " TPS659037", + "allResponseList" : [ { + "contentId" : "3323128", + "userName" : "Nastasha", + "rankPoints" : "6780", + "rankName" : "Expert", + "date" : "Apr 21, 2020 4:11 PM", + "userId" : "4056350", + "content" : "Sakai-san, If the VCCA slew rate or VRTC discharge level was not considered at time of design, there is the chance for the device to not turn back on during fast off/on conditions. One of these conditions must be met to guarantee a POR event in fast off/on events. Please note that the TPS659037 is changing silicon revision over the next year (part number staying the same) that will resolve this issue for future builds and designs. Thanks, Nastasha" + }, { + "contentId" : "3323956", + "userName" : "Yuto Sakai", + "rankPoints" : "5515", + "rankName" : "Genius", + "date" : "Apr 22, 2020 8:12 AM", + "userId" : "4748671", + "content" : "Hi Nastasha-san, Thank you for your reply. How fast is \"fast off / on\"? If either Vcc slew rate or LDOVRTC_OFF condition is met, is the POR event guaranteed? Best regards, Yuto Sakai" + }, { + "contentId" : "3324766", + "userName" : "Nastasha", + "rankPoints" : "6780", + "rankName" : "Expert", + "date" : "Apr 22, 2020 6:07 PM", + "userId" : "4056350", + "content" : "Sakai-san, The timing of the fast on/off if system dependent, based off your VCCA slew rate (which may not be linear and depends on your board loading and capacitance). The POR detection mechanism samples every 1ms. If the VCCA supply falls faster than 90mV/ms between 1.9V and 1.8V, than the POR may not be detected. The LDOVRTC discharging can also allow the device to detect POR if it discharges below 300mV. Depending on how long your system takes to reach that voltage after an off event, you will have an idea of how fast the off/on timing can be for your system. Any off/on event that is faster than the discharge time of the LDOVRTC if your VCCA is dropping too fast, could cause a POR to not be detected. Thanks, Nastasha" + }, { + "contentId" : "3325125", + "userName" : "Yuto Sakai", + "rankPoints" : "5515", + "rankName" : "Genius", + "date" : "Apr 23, 2020 2:20 AM", + "userId" : "4748671", + "content" : "Hi Nastasha-san, Thank you for your support. Let me ask you an additional question. What's the problem caused by missing POR events? Best regards, Yuto Sakai" + }, { + "contentId" : "3327459", + "userName" : "Nastasha", + "rankPoints" : "6780", + "rankName" : "Expert", + "date" : "Apr 24, 2020 6:54 PM", + "userId" : "4056350", + "content" : "Sakai-san, If the POR event is not detected, the device will not start up. It will need to be reset again. Thanks, Nastasha" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS659037" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898782.json b/data/json/DLP/898782.json new file mode 100644 index 0000000000000000000000000000000000000000..6505c448b9085874d6d38adb6137985b49f3b429 --- /dev/null +++ b/data/json/DLP/898782.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898782", + "reporterName" : "K.Shidara", + "rankPoints" : "2025", + "resolutionStatus" : "", + "ticketName" : "TPS63700: Vneg max current", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 11", + "queryText" : "Part Number: TPS63700 Hi Team Would you advise my customer's question of Vneg max current at Vin = 3.15V, Vout = - 6.7V? Because max current is difficult to estimate from the below graph in datasheet. Thanks Best regards Shidara", + "partNumber" : " TPS63700", + "allResponseList" : [ { + "contentId" : "3323624", + "userName" : "Milos", + "rankPoints" : "7260", + "rankName" : "Expert", + "date" : "Apr 22, 2020 1:21 AM", + "userId" : "5692358", + "content" : "Hi Shidara, Looking at the graph, I would say at least 200 mA. We can also measure it in the lab, but due to the limited lab access this might take a few days, and the results would anyway have at least 10% uncertainty due to device tolerances. Best regards, Milos" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS63700" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898784.json b/data/json/DLP/898784.json new file mode 100644 index 0000000000000000000000000000000000000000..205ea1e99b1972102a0dcc70d58ca6f0ab280aa6 --- /dev/null +++ b/data/json/DLP/898784.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898784", + "reporterName" : "Gerasimos Maroulis", + "rankPoints" : "60", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC28711: Problem with the control response of the IC", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 11", + "queryText" : "Part Number: UCC28711 Hello, I designed a flyback converter using the UCC28711. The DC input voltage ranges from 150V-1000V and the output voltage consists of 2 outputs of 17V each. Unfortunately, the circuit does not respond as expected. I observe different responses of the control law of the IC according to the input votlage. In particular, when the for input voltage is: up to 270V, the output is correct. (file name: 270V.pdf) From 270V-300V, the control law reduces the frequency and the duty cycle discharging the output up to 13.5V. Then it increases the frequency and the duty cycle again, until the output becomes 17V. After that, it repeats again the process. Thus, the output voltage, looks more like a sawtooth. (file name: 300V.pdf) For output voltage close to 320V, all of a sudden the output becomes 12.37V. (file name:330V.pdf) In general, the level of input voltage at which the changes happen depends on the load, but overal the pattern is the same. Have you seen anything similar in other applications? In the following pdf you can find attached the waveforms of important parameters. Blue:Vdd Red:DRV Green: voltage on the anode of the auxiliary winding diode Yellow: Output270V.pdf 300V.pdf 330V.pdf Thank you.", + "partNumber" : " UCC28711", + "allResponseList" : [ { + "contentId" : "3322941", + "userName" : "Hong Huang", + "rankPoints" : "18085", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 2:33 PM", + "userId" : "616779", + "content" : "I suggest you to take a look trouble shooting steps from the below link. /.../slua783 Also, you may make one output debugging and leave the other one no load." + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC28711" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898785.json b/data/json/DLP/898785.json new file mode 100644 index 0000000000000000000000000000000000000000..6c03bfcd7f22b371b7fb896c94c46d1ab4addec4 --- /dev/null +++ b/data/json/DLP/898785.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898785", + "reporterName" : "alikaan", + "rankPoints" : "810", + "resolutionStatus" : "", + "ticketName" : "BQ40Z80: bq40z80 discharge current error", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 11", + "queryText" : "Part Number: BQ40Z80 Hi everyone, I noticed some issues when I working on my custom board. When I connect the 6S battery to the DC load, I'm getting some changes on the bqstudio screen for charge&discharge FET status. When I adjust the discharge current limit to the 4 Amper, my FET status changing. Also FETs are not turning off. My setting screen and bqstudio screen attached also. Actually I really don't understand why my status is changing.", + "partNumber" : " BQ40Z80", + "allResponseList" : [ { + "contentId" : "3323111", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 4:00 PM", + "userId" : "1864278", + "content" : "Can you share your gg file and also a bqStudio log file? Thanks. Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/bqStudio", "/support/power-management/f/196/tags/bq40z80" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898786.json b/data/json/DLP/898786.json new file mode 100644 index 0000000000000000000000000000000000000000..0a5b8684a2b399ff5cca8c565ef10dac6359eea2 --- /dev/null +++ b/data/json/DLP/898786.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "898786", + "reporterName" : "user4451984", + "rankPoints" : "740", + "resolutionStatus" : "Resolved", + "ticketName" : "WEBENCH® Tools/LM3481: Simulation with WEBENCH of a SEPIC circuit with an LM3481", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 15", + "queryText" : "Part Number: LM3481 Tool/software: WEBENCH® Design Tools Hello, I have simulated a converter with WEBENCH, I have attached the simulation. The inductor suggested is a DRQ127-3R3-R, datasheet report for the series configuration a max Irms = 5.23 A and Isatpeak=10.8A. looking the graphics for Lin (see below) it seems that the current can be higher than 5.23A. Are my considerations wrong ? Can I use that inductor even if Vin=4V and Iout = 3A, as required in my simulation ? Best regards Riccardo WBDesign17.pdf", + "partNumber" : " LM3481", + "allResponseList" : [ { + "contentId" : "3323022", + "userName" : "Yinsong Cai1", + "rankPoints" : "950", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 3:15 PM", + "userId" : "6183682", + "content" : "Hi Riccardo, Thanks for your interest in LM3481. The Irms current rating is the current of 40degree C temperature increase. For example, if your ambient temperature is 25 C, the inductor would becomes 65 deg C theoretically, which should be fine. That being said, if you have high ambient temperature or you want a better thermal condition for the inductor, you will need to find a better inductor. Please let me know if you have further questions. Thanks, Yinsong" + }, { + "contentId" : "3323027", + "userName" : "user4451984", + "rankPoints" : "740", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 3:19 PM", + "userId" : "4451984", + "content" : "Thanks a lot" + } ], + "tags" : [ "/support/power-management/f/196/tags/WEBENCH_AE00_%2bDesign%2bTools", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2bregulator%2boutputs", "/support/power-management/f/196/tags/_2300_%2bSEPIC", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2bDC_2F00_DCconverter", "/support/power-management/f/196/tags/_2300_LM3481", "/support/power-management/f/196/tags/LM3481" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898788.json b/data/json/DLP/898788.json new file mode 100644 index 0000000000000000000000000000000000000000..f9553954cdac6d8f73fa7febe8f5e982244d8022 --- /dev/null +++ b/data/json/DLP/898788.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898788", + "reporterName" : "user5093836", + "rankPoints" : "40", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "Compiler/BQ40Z50: BQ40Z50问题汇总", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 16", + "queryText" : "Part Number: BQ40Z50 Tool/software:company C/C++ Compiler 对于BQ40Z50有如何的几个问题： 1、当Qmax的设置数值比DC容量低的时候，SOH会降低。 2，温度对SOH,SOC的影响，但是没有看到实际数据的影响；能讲下吗? 3，对于电池类型的选择，会产生什么影响；或者说会导入那些数据", + "partNumber" : " BQ40Z50", + "allResponseList" : [ { + "contentId" : "3323051", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 3:26 PM", + "userId" : "1864278", + "content" : "Please post your questions in English. Thanks. Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/bq40z50", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2bSTAT1", "/support/power-management/f/196/tags/TI%2bC_2F00_C_2B002B00_%2bCompiler" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898789.json b/data/json/DLP/898789.json new file mode 100644 index 0000000000000000000000000000000000000000..85d9a315c9fbc65f8b4be010c44a7f56a4415ce1 --- /dev/null +++ b/data/json/DLP/898789.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898789", + "reporterName" : "Weinan Ji", + "rankPoints" : "265", + "resolutionStatus" : "", + "ticketName" : "BQ51050B: Lower voltage limit for battery?", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 9", + "queryText" : "Part Number: BQ51050B Does anyone know if there is a lower limit for how much voltage of the battery needs to have before the charging could work properly? In a few cases, the battery is fully discharged, meaning the protection circuit stopped the battery output for under voltage lockout. Could the device bring it back to life again? I noticed that there is short circuit voltage rated as 0.8V, referred to page 7 (battery short protection) of datasheet. Does it mean the battery could not be discharged lowered than 0.8V? Could the battery be fully discharged to 0V? Thanks in advance!", + "partNumber" : " BQ51050B", + "allResponseList" : [ { + "contentId" : "3322877", + "userName" : "Bill Johns", + "rankPoints" : "46985", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 1:51 PM", + "userId" : "244698", + "content" : "Hello \"In a few cases, the battery is fully discharged, meaning the protection circuit stopped the battery output for under voltage lockout. Could the device bring it back to life again?\" -- Bill J - For Li-Ion or Li-Pol battery the protect circuit will prevent deep discharge by disconnecting the cell. Typically this point is about 3V but could be lower depending on the cell. The battery charger should reset the protection circuit when it starts charge. \"Does it mean the battery could not be discharged lowered than 0.8V? Could the battery be fully discharged to 0V?\" -- Bill J - If the battery voltage is 0V to 0.8V it is probably damaged. The battery short protection is a safety feature that will limit current during a possible hazardous condition." + } ], + "tags" : [ "/support/power-management/f/196/tags/bq51050B" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898791.json b/data/json/DLP/898791.json new file mode 100644 index 0000000000000000000000000000000000000000..c6ab3b130c5d3cc92b975bf5ee40cf293a6a8f30 --- /dev/null +++ b/data/json/DLP/898791.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898791", + "reporterName" : "Andre Stelzer", + "rankPoints" : "10", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ28Z610-R1: I2C PullUp , internal pin construction", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 19", + "queryText" : "Part Number: BQ28Z610-R1 Hello, a want to use the BQ28Z610-R1. At the moment i have some problems with the I2C pins. Based on this: /support/power-management/f/196/t/625940?tisearch=e2e-sitesearch&keymatch=BQ28Z610%2525252525252520i2c /support/power-management/f/196/t/624959?tisearch=e2e-sitesearch&keymatch=BQ28Z610%252525252520i2c it was said that the mentioned 3,3 kR pulldown resistor is wrong. But the newest datasheet still have the resistor entry: So the question is: is this still wrong and the I2C pins are simple open-drain pins without any pullup/pulldown resistor? Best regards Andre", + "partNumber" : " BQ28Z610-R1", + "allResponseList" : [ { + "contentId" : "3323185", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 5:06 PM", + "userId" : "1864278", + "content" : "Hi Andre, The 3.3k pulldown resistance should be still an error. The I2C pins are open-drain pins and need pull-up resistors. Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ28Z610", "/support/power-management/f/196/tags/BQ28Z610_2D00_R1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898793.json b/data/json/DLP/898793.json new file mode 100644 index 0000000000000000000000000000000000000000..20ebb82da89a4c93eb660cf1f9eb132dd2e3cf80 --- /dev/null +++ b/data/json/DLP/898793.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898793", + "reporterName" : "ghasem aghdam", + "rankPoints" : "315", + "resolutionStatus" : "Resolved", + "ticketName" : "UC3875: Input filter capacitor", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 12", + "queryText" : "Part Number: UC3875 Hi there, I'm trying to find some guidelines for choosing an input capacitor for regular phase-shifted full bridge (PSFB) topology. Do you have something (any documents/ANs) to share with me? Any help you could provide would be much appreciated. Looking forward to hearing from you. Thanks & BR, Ghasem", + "partNumber" : " UC3875", + "allResponseList" : [ { + "contentId" : "3322758", + "userName" : "John Griffin1", + "rankPoints" : "32175", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 12:50 PM", + "userId" : "1693693", + "content" : "Hello Ghasem, The capacitor needs to be able to supply the input current switching wave shape to the converter whether it is a PSFB or any other kind of converter. So you can calculate the RMS input current and ensure that the input capacitor is rated for this value. That is the minimum input capacitor requirement. The actual value used will normally exceed this number. In practice because the power rating is proportional to the input capacitance times the input voltage squared then the amount of input capacitance is proportional to W/(V^2). So for example the UCC28950EVM has an input voltage of 390V with a power rating of 600W and it uses 330uF input capacitance. This is sort of a rule of thumb used for the initial prototype design. Your next step would perhaps be to simulate your design with Power Stage Designer tool and this will accurately calculate the capacitor ripple current and voltage. You will then be able to check the effects of increasing or decreasing the capacitor value. Your final design will be limited by the volume of space available for Cin and EMI considerations since differential mode noise is minimized by increasing Cin. There also may be a requirement for a holdup time for the converter and the value of input capacitance may be determined solely by the operating range of input voltage and the hold up time. Hope this helps . Regards John" + } ], + "tags" : [ "/support/power-management/f/196/tags/UC3875" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898794.json b/data/json/DLP/898794.json new file mode 100644 index 0000000000000000000000000000000000000000..ad49a4f0d06d1edaa2ec2cc2bbdcec65776b0cf6 --- /dev/null +++ b/data/json/DLP/898794.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "898794", + "reporterName" : "Hisao Uchikoshi", + "rankPoints" : "10050", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS65131: Inductance calculation for 60mA load current", + "rankName" : "Genius", + "replies" : " 2", + "views" : " 19", + "queryText" : "Part Number: TPS65131 Hi Experts, We are calculating the inductance L1 and L2 based on below formula described on page 13 of the data sheet. In our usage model, the load current is less than 60mA. If we calculate L1 and L2 with the load current as 60mA, L1 and L2 are calculated as below. L1 = 45.37uH L2 = 228.7uH There is an explanation on page 14 as below. My question is if we can ignore above inductor recommendation value and can use TPS65131 with light load current as 60mA. Regards, Uchikoshi", + "partNumber" : " TPS65131", + "allResponseList" : [ { + "contentId" : "3323044", + "userName" : "Aaron Goodson", + "rankPoints" : "5630", + "rankName" : "Expert", + "date" : "Apr 21, 2020 3:24 PM", + "userId" : "4719001", + "content" : "Hi, I have notified our expert regarding this topic. Please expect a response by 4/23/20. Thanks, Aaron" + }, { + "contentId" : "3326304", + "userName" : "Liaqat Khan", + "rankPoints" : "7780", + "rankName" : "Expert", + "date" : "Apr 23, 2020 10:04 PM", + "userId" : "291526", + "content" : "Hello Uchikoshi-san, 4.7uH inductor has been used on the TPS65131EVM and most validation was done with this value at light as well as heavier load. So I would suggest to stay with 4.7uH for both boost and inverting converter but if customer must increase inductance, to perhaps reduce ripple, I would not suggest to go beyond 10uH because higher inductance value will reduce loop stability margin. Customer should measure and ensure that there is enough phase/gain margin for loop stability. Kind Regards, Liaqat" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS65131" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898805.json b/data/json/DLP/898805.json new file mode 100644 index 0000000000000000000000000000000000000000..5ded8326a564f6023c79d8ce6fff81f55cd28de1 --- /dev/null +++ b/data/json/DLP/898805.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "898805", + "reporterName" : "Danil Koshelev", + "rankPoints" : "230", + "resolutionStatus" : "", + "ticketName" : "BQ27750: Gas Gauging", + "rankName" : "Prodigy", + "replies" : " 11", + "views" : " 64", + "queryText" : "Part Number: BQ27750 Dear TI, I use BQ27750 for 36Ah battery ( 4 Ah*9 Cells ). For FCC and RM registers limit is 32767. As result of this I need calibrate current like 1:2 ( real : variable ). Means +1 A charge shows on BQStudio like +500 mA. At first, I was charging the battery until full charge statement, and then start discharge with constant current -1A ( for microcontroller -500mA ). At the end of the test (after 35h.) I compare result from discharge machine and from BQ27750. Discharge machine shows 35 Ah. But on the BQ27750 ( if calculate: RMCapacity_0h – RMCapacity_35h ) = 16.2 *2 = 32.4 Ah. If I manualy intergrate data CoulombCounter from BQStudio, I have the same result like discharge machine 17.5*2 = 35 Ah! Correct value! Means, measuring CoulombCounter of BQ27750 is perfect. Also Qmax Cell1 calculation is correct. But Impedance Track algorithm calculation of RMCapacity is wrong ( also FCC after updating ). I make that test at two types of discharge machines with few a batteries at min. 4 cycles – the same result. And my question – what can be wrong at ITrack settings? From «Theory and Implementation of Impedance Track Battery Fuel-Gauging Algorithm» document I can see BQStudio «indirectly» measuring internal resistance of battery, but there is not information how? If R = deltaU / I, BQ27750 ITrack algorithm «doesn’t know» about scaling factor of current and calculate internal resistance ( impedance ) is wrong. As a result is not correct correction of capacity. Does this sound like the truth? Best regards, Danil", + "partNumber" : " BQ27750", + "allResponseList" : [ { + "contentId" : "3323350", + "userName" : "Dominik Hartl11", + "rankPoints" : "35875", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 7:22 PM", + "userId" : "9849", + "content" : "Did you run a learning cycle where the gauge measured the (scaled) impedance? How does Ra change over the 4 cycles? What is your ChemID?" + }, { + "contentId" : "3323375", + "userName" : "Danil Koshelev", + "rankPoints" : "230", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 7:39 PM", + "userId" : "5202536", + "content" : "Dear Dominik, I have ChemID = 0x1636. I have not information at datalog about Ra. I didn't run the \"special\" learning cycle, just made a few cycles of full charge/discharge without interrupt. Does it enough for learning system or necesasry to go at special learning mode by I2C command or something like this? Best regards, Danil" + }, { + "contentId" : "3323383", + "userName" : "Dominik Hartl11", + "rankPoints" : "35875", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 7:44 PM", + "userId" : "9849", + "content" : "The gauge will update Ra automatically in regular use. A learning cycle is just a well controlled charge/relax/discharge/relax cycle. If the gauge hasn't learned Ra yet, then you don't have to do anything via I2C. /lit/an/slua777/slua777.pdf Please read the Ra table and attach it to this thread. I'd like to compare this to the default from ChemID 1636" + }, { + "contentId" : "3324311", + "userName" : "Danil Koshelev", + "rankPoints" : "230", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 1:39 PM", + "userId" : "5202536", + "content" : "Ok, please give me time to get information about Ra. But please answer for a two important questions: 1) Is it possible if I calibrate current with factor ( 1:2 ), at this case corelation part of IT algorithm ( depend of Ra = deltaU/I ) make a wrong calculation? 2) If gauge has already updated the information about Ra, how to start the update again? Best regards, Danil" + }, { + "contentId" : "3324639", + "userName" : "Dominik Hartl11", + "rankPoints" : "35875", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 4:40 PM", + "userId" : "9849", + "content" : "#1: It will calculate scaled impedance, which will result in the same IR drop with your scaled current so this is usually not an issue. #2: The gauge will continuously update Ra but with different filter settings between first and subsequent updates. You can manually change Update Status to 0x04 to reset this." + }, { + "contentId" : "3324799", + "userName" : "Danil Koshelev", + "rankPoints" : "230", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 6:45 PM", + "userId" : "5202536", + "content" : "#1: You know BQ27750 there is not \"Scale Factor\" register ( as opposed to BQ78350)? How algorithm to know about I_real = I_measuring *2 and as result Ra_measuring = Ra_real/2 ? #2: Thank you!" + }, { + "contentId" : "3327600", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 24, 2020 9:55 PM", + "userId" : "3528441", + "content" : "There's no scale factor here." + }, { + "contentId" : "3328120", + "userName" : "Danil Koshelev", + "rankPoints" : "230", + "rankName" : "Prodigy", + "date" : "Apr 26, 2020 4:40 PM", + "userId" : "5202536", + "content" : "Dear all, I made \"clean\" test, - used original firmware file \"bq27750_v0_05_build_13.srec\", not changed any parameters and made learning cycle (charge/relax/discharge/relax): 1) with 1:1 current calibration 2) with 1:2 current calibration Result: Impedance Track™ algorithm make correct calculation in both cases! Resume: I was wrong! Really Impedance Track™ independent of current calibration! Now my opinion: According to \"The Impedance Track Theory\" document the OCV correction is based on the impedance from the table Ra and calculated by formula: OCV` = OCV-I * R. And Ra table is updated based on the current and the difference between the actual voltage and the voltage of the corresponding DOD (from table): R(DOD) = ( V – OCV(DOD,T) ) / I. If a current with the same calibration factor is used in these calculations, as a result calibration factor does not matter. //************************************************************************************************* #1: But why Ra table on batteries with the different calibration factors is the same??? //************************************************************************************************* 1:1 current calibration Ra Table after learning cycle 1:2 current calibration Ra Table after learning cycle" + }, { + "contentId" : "3329407", + "userName" : "Danil Koshelev", + "rankPoints" : "230", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 7:41 PM", + "userId" : "5202536", + "content" : "Dear Dominik, above I show Ra table after 4 cycles ( two types calibration ) Please your comment! I do not understand why the Ra tables has the same values? Maybe that not update. Chemisty of my last test CH_ID = 0x3142. Thank you!" + }, { + "contentId" : "3329702", + "userName" : "Dominik Hartl11", + "rankPoints" : "35875", + "rankName" : "Mastermind", + "date" : "Apr 28, 2020 1:09 AM", + "userId" : "9849", + "content" : "Did the gauge set the RDIS bit at any time during your discharge test? What was your load (in C rate) during the learning cycle?" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ27750", "/support/power-management/f/196/tags/bqStudio" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898806.json b/data/json/DLP/898806.json new file mode 100644 index 0000000000000000000000000000000000000000..ba3a419c3d2bf191c7b1055f696e7854584674ed --- /dev/null +++ b/data/json/DLP/898806.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898806", + "reporterName" : "Kuan Wei Chen (Kevin Chen)", + "rankPoints" : "8330", + "resolutionStatus" : "Resolved", + "ticketName" : "LMZ31530: Thermal Performance", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 15", + "queryText" : "Part Number: LMZ31530 Dear Team Can you base on the below schematic to calculate the temperature on the case? It should related to power loss and Junction-to-case (top) thermal resistance, right? BR Kevin", + "partNumber" : " LMZ31530", + "allResponseList" : [ { + "contentId" : "3322819", + "userName" : "Kris F", + "rankPoints" : "14480", + "rankName" : "Genius", + "date" : "Apr 21, 2020 1:15 PM", + "userId" : "3795855", + "content" : "Hi Kevin, Yes, case temp will be related to the power loss and thermal resistances. The customer design appears to be set to fsw = 650kHz, but Figure 3 in the datasheet should give a good indication of expected power loss with the Vin=12V Vout=0.9V Fsw = 500kHz power dissipation curve. It looks like there will be about 4.9W of dissipation at 25A With this power dissipation and the thermal resistances in the Thermal Information table and assuming we have an ambient temperature of, say, 30°C, and natural convection conditions, we can estimate that junction temperature will be about Tj = Ta + Pd*ThetaJA --> 30°C + 4.9W*8.6°C/W = 72.1°C. Case temperature will be lower than this by Pd*PsiJT or 4.9W*1.6°C/W = 7.84°C. In other words, estimated case temperature will be around 64.3°C. I hope this helps, Kris" + } ], + "tags" : [ "/support/power-management/f/196/tags/LMZ31530" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898811.json b/data/json/DLP/898811.json new file mode 100644 index 0000000000000000000000000000000000000000..3d9a3194d7dcb93342ad6cdb984dc9df95c8815d --- /dev/null +++ b/data/json/DLP/898811.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898811", + "reporterName" : "Yoshiki Ochi", + "rankPoints" : "1150", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC21222-Q1: How does propagation delay affect dead time max/min value and dead time matching?", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 27", + "queryText" : "Part Number: UCC21222-Q1 Hi team, How does propagation delay affect dead time max/min value and dead time matching? Datasheet says dead time range when RDT=20k is 160ns~240ns. Also dead time matching is 20ns max. Do they include propagation delay, whose max value is 40ns? Also do they include propagation delay matching, whose max value is 5ns? In addition, how should we design dead time with including propagation delay? Regards, Ochi", + "partNumber" : " UCC21222-Q1", + "allResponseList" : [ { + "contentId" : "3323217", + "userName" : "Dimitri James", + "rankPoints" : "1185", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 5:29 PM", + "userId" : "6285312", + "content" : "Ochi-san, The dead-time is defined as the time when neither ChA nor ChB are on/conducting. Propagation delay itself doesn't necessarily affect deadtime if everything is well-matched. If the propagation delay varies between turn-on and turn-off or channel to channel, and prop delay matching is not totally perfect from channel to channel, then dead-time is needed to avoid short-circuit. Regarding your question about whether dead-time figure includes the prop delay / matching: The dead time is enforced between the rising and falling edge of output as in the Figure 30 below. The operation of dead-time waveform is shown in this figure of the datasheet To design dead-time, the basic principle is to find the minimum off time you need to ensure that both channels will never be switched on, plus some margin/headroom. This can be done by: sum pulse-width distortion, channel to channel delay matching, and difference of rise and fall time for a channel. For accuracy the rise and fall time should be based on the load that will be driven. I hope this helps. Let me know if you have more questions. Best Dimitri" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC21222_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898814.json b/data/json/DLP/898814.json new file mode 100644 index 0000000000000000000000000000000000000000..4cb2748fe4b9823f2c7c485440d9f7aa4a703da9 --- /dev/null +++ b/data/json/DLP/898814.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898814", + "reporterName" : "Rob Warburton", + "rankPoints" : "30", + "resolutionStatus" : "Resolved", + "ticketName" : "LM76005-Q1: Production ready schedule?", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 19", + "queryText" : "Part Number: LM76005-Q1 Hello, I am designing a system and the LM76005 is a suitable and preferred part, however the device's status is only 'Preview' instead of 'Active'. Do you know when this part might become available? Thanks, Rob", + "partNumber" : " LM76005-Q1", + "allResponseList" : [ { + "contentId" : "3323042", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 3:23 PM", + "userId" : "1881345", + "content" : "Hello I will speak to the marketing team for this device and get back to you as soon as possible. Thanks" + }, { + "contentId" : "3323156", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 4:42 PM", + "userId" : "1881345", + "content" : "Hello The LM76005-Q1 and the commercial LM76005 are planned to be \"active\" in Q3CY20 Samples and EVMs are available now. Thanks" + }, { + "contentId" : "3323205", + "userName" : "Rob Warburton", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 5:18 PM", + "userId" : "3334976", + "content" : "Thank you for the swift response." + } ], + "tags" : [ "/support/power-management/f/196/tags/LM76005", "/support/power-management/f/196/tags/_2300_Preview", "/support/power-management/f/196/tags/_2300_DCDC", "/support/power-management/f/196/tags/LM76005_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898815.json b/data/json/DLP/898815.json new file mode 100644 index 0000000000000000000000000000000000000000..9fe32e5bacd8b9f92dca6ae346765d984897710b --- /dev/null +++ b/data/json/DLP/898815.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898815", + "reporterName" : "yi xiao", + "rankPoints" : "3675", + "resolutionStatus" : "", + "ticketName" : "UCC38C43: how to determine MOSFET gate drive peak current", + "rankName" : "Genius", + "replies" : " 3", + "views" : " 34", + "queryText" : "Part Number: UCC38C43 Hi there, I consider to use UCC38C43 in simple flyback design to drive Vishay mosfet SIR872A, and have some questions about how can we calculate the peak and average gate current of the mosfet. Design Spec: Vdrv(3843) =12V, Fs=80KHZ, Rgate=10ohm, Vin=20V, Vout=60V, turns-ration=1:1. DCM. Duty cyle = 10%~40%. The breif sch of drive part and mosfet part is as below : I learned that driving mosfet is mainly about quickly provide Qg(tot) and peak current capability is important for driver IC selection. Here are some of my thoughts and calculation on peak and gate current. 1. The max. current should be limited by R(Hi_3843) + Rgate, approx. 12V/(10ohm+10ohm) = 0.6A. 2. Igate(average) ≈ Q(tot) * Fs = 47nC*80Khz = 3.76mA, which means 3843 itself actually provides quite small power, so most of the transit large gate drive current (charges) should be provided by C_bypass of 3843 VDD pin. Based on this conclusion, if 3843 VDD pin is not properly decoupled, 3843 may not capable of outputing large peak current as high as 1A. 3. bycompany slua618 equation(18), we can calculate C_bypass value without knowing the gate peak current. C_bypass = [(0.1mA*40%/80KHZ) + 47nC] / (5%*12V) = 80nF, so 1uF ceramic should be far enough. 4. Finally, one of my confusion is, how shold we calculate (or estimate as precise as possible) the Igate(peak) value? Or is it necessary to do this ? Someone on internet recommends taking 1/100*Ts as the turn-on transition process time t-on, then derive Igate(peak) = Q(tot) / ton_transistion, and I think we should also minus the mosfet turn-on delay time (or rising time??) based on this. In my design this would be Igate(peak) ≈ 47nF/ [0.01*12.5us - 30ns(max)] = 0.497A < 0.6A < 1A(3843 capability). But I am not sure whether this \"1/100*Ts ≈ turon on transition time\" is reasonable or not, in other word, how could we determine the transition time requirement? 5. Ps: Onecompany note slua882 does mentioned a simplified way to get Igate(peak), but I think the assumption and simplifications may be kind of rough.... I hopecompany experts could help review my thinking process of peak and gate gate current, any corrections and advice are appreciated. Thanks!", + "partNumber" : " UCC38C43", + "allResponseList" : [ { + "contentId" : "3324008", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 9:05 AM", + "userId" : "1139254", + "content" : "Hi Yi, You can measure the gate drive current by measuring the differential voltage across the gate drive resistor, either with a differential scope probe or by using the maths function on the scope to subtract Ch1 from Ch2. The other point is that it appears that you are using a Vcc and hence gate voltage of 20V, this will increase the gate drive power loss and its also the max rating for the Vgs of the mosfet. Looking at the mosfet datasheet the Rds on of mosfet is characterised at 10V, driving the device at higher gate drive voltages brings no benefit in terms of power dissipation. Regards Peter" + }, { + "contentId" : "3324031", + "userName" : "yi xiao", + "rankPoints" : "3675", + "rankName" : "Genius", + "date" : "Apr 22, 2020 9:33 AM", + "userId" : "1453327", + "content" : "Hi peter, my questions are about how to calculate the peak gate current at design phase rather than testing / measuring. And my VDD for 3843 is 12V, not 20V. Thanks." + }, { + "contentId" : "3326944", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 11:40 AM", + "userId" : "1139254", + "content" : "Hi Yi, 12 V Vcc is good. The peak current can be calculated from the rise and fall times in the datasheet as well. During electrical test Vcc is 15V and Cap load on the driver is 1nF, rise time is 25ns typical and fall time is 20ns typical. This gives 0.6A turn on current and 0.75A turn off current. The difficult piece here is estimating the internal resistance of the mosfets in the internal gate driver. One assumption we could make is that the rise and fall times with the 1nF cap load are limited by the Rds-on of the turn on and turn off mosfets inside the IC. This would give us a Rdson of for turn of about 25R and for turn of of 20R. The problem is that this Rdson varies with the gate drive of the internal devices as they are being switched. If you are using an external Rgate of 10R with a 12V Vcc and given the fact that the likely internal Rds of the gate drive mosfets are in the region of 20R, then I think you can safely say that the peak current will be well within the 1A rating. Regards Peter" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC38C43" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898823.json b/data/json/DLP/898823.json new file mode 100644 index 0000000000000000000000000000000000000000..25ccd00dfd5ac2ee37a70aebdc4f0b1963d2a239 --- /dev/null +++ b/data/json/DLP/898823.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898823", + "reporterName" : "Mike Rankin", + "rankPoints" : "30", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ2970: Battery protection design not working", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 13", + "queryText" : "Part Number: BQ2970 Can someone please tell me what I did wrong on my battery protection design? The 18650 battery charges normally measuring around 4v or so but VBAT always measures around 1.4v. It is possible the dual mosfets are the wrong type but they have a Vgs of 1v. Parts used are:company BQ29700DSER: www.digikey.com/.../5973209 Vishay SI1922EDH-T1-GE3: www.digikey.com/.../3679992", + "partNumber" : " BQ2970", + "allResponseList" : [ { + "contentId" : "3323515", + "userName" : "WM5295", + "rankPoints" : "39810", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 10:15 PM", + "userId" : "17523", + "content" : "Hi Mike, I don't recognize a problem.company recommends the Rgs resistors but the part works without them. Check that the layout put the pins where you expect for all the chips. When charging be sure COUT goes high, check that the charger takes GND below VSS of U3. Shorting across the FETs should also put the part in normal operation mode. Watch what happens to COUT and DOUT when the charger is disconnected. A transient could but the BQ2970 in fault mode, but it would seem unlikely. If it is a new build try another board, if it is one of a kind, try different parts to see if it might be a damaged part in handling or assembly. Monitoring the circuit is interesting as the BQ2970 has voltages defined from VSS, most of the system sees voltages with respect to GND." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ2970" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898825.json b/data/json/DLP/898825.json new file mode 100644 index 0000000000000000000000000000000000000000..f7277bdd3dcf68dfd44ae3cfddf1e1ee910e3414 --- /dev/null +++ b/data/json/DLP/898825.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "898825", + "reporterName" : "J Luo1", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LMG5200: SPICE model gives error in mixed simulation modula of Altium designer", + "rankName" : "Prodigy", + "replies" : " 5", + "views" : " 19", + "queryText" : "Part Number: LMG5200 Hi everyone, I am interested in using the LMG5200 for a full bridge application. I have downloaded the unencrypted spice model of LMG5200 and converted it into a CKT model file that can be read by the Altium designer simulation module. I made a very simple connection as below so to try out. HI_signal and LI_signal are simply two 10V pulses with 180 phase difference, each of them have a 25% duty cycle. Vin= 80V, Vcc=5V. The simulation results generated report partially shown as below: finally a error at the end: then the simulation is aborted. The transient analysis setup is set as below, I don't the time step problem comes from the setup. I My knowledge of SPICE is not well enough to diagnose the cause, so I hope someone can be so kind to give me some advice on solving this. Thank you in advance! PS: This is where I downloaded the model Kind regards, S.suns", + "partNumber" : " LMG5200", + "allResponseList" : [ { + "contentId" : "3323438", + "userName" : "Yichi Zhang.", + "rankPoints" : "870", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 8:42 PM", + "userId" : "5338385", + "content" : "Hello, Thanks for reaching out regarding the LMG5200 model. The model is used by other customers and has not shown an issue. I suspect it's more likely to be an issue during the format conversion. Could you please try the model in other SPICE tool which does not require conversion and let us know if you still encounter problems. Regards," + }, { + "contentId" : "3324043", + "userName" : "J Luo1", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 9:47 AM", + "userId" : "4896561", + "content" : "Hi Yichi, Thanks for your reply! As for the conversion, I didn't change the content in the spice model file, I only opened it with Notepad and saved it as a .ckt file. In Altium designer the underlying engine is NGSPICE, do you think that is the reason? As the provided one is PSPICE model. Thank you! Kind regards, S.suns" + }, { + "contentId" : "3324324", + "userName" : "Yichi Zhang.", + "rankPoints" : "870", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 1:46 PM", + "userId" : "5338385", + "content" : "Hello Suns, Let me check with my team to see if they have experience converting .lib to .ckt. Meanwhile, could you verify the functionality of the model in SPICE tool such as PSPICE? Thanks! Regards," + }, { + "contentId" : "3326748", + "userName" : "J Luo", + "rankPoints" : "10", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 7:11 AM", + "userId" : "6295040", + "content" : "Hi Yichi, Thanks for your reply, please let me know once you and your team have any conclusion on the conversion problem. Meanwhile, I have tried the TINA-TI model on TINA-TI platform, and it works perfectly :) My circuit is quite simple so to use this component, I will work with TINA-TI for now. Kind regards, Suns" + }, { + "contentId" : "3327112", + "userName" : "Yichi Zhang.", + "rankPoints" : "870", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 2:21 PM", + "userId" : "5338385", + "content" : "Sounds good Suns! I will update on this posts if any more info on the conversion comes up. Regards," + } ], + "tags" : [ "/support/power-management/f/196/tags/LMG5200", "/support/power-management/f/196/tags/SPICE%2bsimulation" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898831.json b/data/json/DLP/898831.json new file mode 100644 index 0000000000000000000000000000000000000000..96a169f30e21631c53d6ebee27bc8dcabbc24a24 --- /dev/null +++ b/data/json/DLP/898831.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "898831", + "reporterName" : "David Bleakley", + "rankPoints" : "110", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS2546: Remote panel dual USB 2.0 charging device", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 21", + "queryText" : "Part Number: TPS2546 Hi, I have a remote panel with 2 USB ports. The USB2.0 port hub is located on the main board and already has current limiting devices providing 1.16-1.74A to each remote USB rail. I would like to add something like the TPS2546 to the remote rail. I do not have additional signals to enable or detect faults. Auto detection of charging mode would be ideal. USB 2.0 communication would need to remain functional (unless a fault condition occurs). If a TFT display powered by USB is connected without a charging protocol, would the device limit to 500mA? What do you suggest?", + "partNumber" : " TPS2546", + "allResponseList" : [ { + "contentId" : "3322723", + "userName" : "David Bleakley", + "rankPoints" : "110", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 12:35 PM", + "userId" : "1146335", + "content" : "I also have i2c on the remote panel" + }, { + "contentId" : "3322919", + "userName" : "Adam Mc Gaffin", + "rankPoints" : "13080", + "rankName" : "Genius", + "date" : "Apr 21, 2020 2:15 PM", + "userId" : "4996939", + "content" : "The TPS2546 does not support I2C. I would still recommend this device based on your other system needs. I recommend reading up on the BC1.2 standard as it can be helpful to have a good understanding of this charging standard which the TPS2546 is based on. As far as the TPS2546 limiting the current for a TFT display, no it will not limit the current unless you actively change which ILIM resistor it references. Let me know if you have any other questions." + }, { + "contentId" : "3323172", + "userName" : "David Bleakley", + "rankPoints" : "110", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 4:50 PM", + "userId" : "1146335", + "content" : "Thans so much for your answer. I wont be able to dynamically control the device control pins, just set it up and leave it. I don't see an auto mode that will attempt different modes. Is my understanding correct?" + }, { + "contentId" : "3324238", + "userName" : "Adam Mc Gaffin", + "rankPoints" : "13080", + "rankName" : "Genius", + "date" : "Apr 22, 2020 12:56 PM", + "userId" : "4996939", + "content" : "No there is no way for the TPS2546 to dynamically control its own control pins. The closest thing is setting the device in DCP_Auto mode that will advertise and establish different charging contract depending on the device that is connected. However, this either shorts together the DP/DM lines or adds a voltage, so data transmission is not possible in these modes. If you need data transmission, CDP and SDP are the modes that you want to use." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS2546" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898841.json b/data/json/DLP/898841.json new file mode 100644 index 0000000000000000000000000000000000000000..d2e11d08c0be2b06bb00389abf28c03336972957 --- /dev/null +++ b/data/json/DLP/898841.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898841", + "reporterName" : "Minqi Zhao", + "rankPoints" : "1100", + "resolutionStatus" : "", + "ticketName" : "LM5155: parameter design to improve loop stablity", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: LM5155 Dear expert, My customer is using LM5155, but find loop is unstable. 1. Vin=9～36V，output 5V/6A(30W)； 2.Due to the PCB size limit, the output capacitor is 100uF*3 MLCC, Lp=9～11uH； 3.When debugging，if current sense resistor R12=0.003R then loop is always unstable. If R12=0.015R then the loop performance is better, however still can't carry full load at 9Vin； 4.When slow down the loop (C25=C26=0.33uF，R20=200R，C23=0.033uF，C24=0.01uF，R21=1K), then the load capacity is better, but still not complete stable and dynamic performance is bad. Please see their schematic as below. Could you help to share a better parameter design? Thanks for your support.", + "partNumber" : " LM5155", + "allResponseList" : [ { + "contentId" : "3323295", + "userName" : "Garrett Roecker", + "rankPoints" : "18240", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 6:36 PM", + "userId" : "3456925", + "content" : "Hi Minqi, Thanks for reaching out with your question and for using the LM5155 in your design. Can you please let me know what transformer is being used? Is the customer just modifying the EVM for the test? I suggest running through the LM5155 flyback quick-start calculator to help with the component selection. If you have any questions please feel free to contact me directly. Thanks, Garrett" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM5155" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898844.json b/data/json/DLP/898844.json new file mode 100644 index 0000000000000000000000000000000000000000..ef4b9e0a0a1a53536a60a1aeb920ddc1038dfa10 --- /dev/null +++ b/data/json/DLP/898844.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898844", + "reporterName" : "Franz Schellhase", + "rankPoints" : "1420", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ20Z655-R1: Similar new device with exactly the same host communication", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 10", + "queryText" : "Part Number: BQ20Z655-R1 Hi team, A customer is looking for BQ20Z655 / BQ20Z655-R1 in their design to make sure they are using the newest device and minimizing the risk of having to replace it in the next 10 years. Is there a similar new device that communicates with a host in exactly the same way (same registers etc.)? The PCB of the battery is going to get adjusted but the software of the separate host product will not be updated. This is to ensure battery downward compatibility to old hosts without update capability in the field. Thank you, Franz", + "partNumber" : " BQ20Z655-R1", + "allResponseList" : [ { + "contentId" : "3323313", + "userName" : "Rushi Dalal38", + "rankPoints" : "210", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 6:51 PM", + "userId" : "4375016", + "content" : "Hi Franz, We don't have a new device that has exactly the same registers. We will continue to manufacture BQ20z655-R1, customer can continue using it! When the customer decides to update their design, we highly recommend migrating to BQ40z50-R2 because this gauge has the latest HW and FW. Regards, Rushi" + } ], + "tags" : [ "/support/power-management/f/196/tags/bq20z655_2D00_r1", "/support/power-management/f/196/tags/bq20z655" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898848.json b/data/json/DLP/898848.json new file mode 100644 index 0000000000000000000000000000000000000000..8bd8c77e8ab090bd9f0ebaafc44d404ac363d799 --- /dev/null +++ b/data/json/DLP/898848.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "898848", + "reporterName" : "Neal Zhu", + "rankPoints" : "990", + "resolutionStatus" : "", + "ticketName" : "BQ24105-Q1: bq24105-q1 3 questions,output voltage,sleep mode,VTSB PIN", + "rankName" : "Intellectual", + "replies" : " 6", + "views" : " 45", + "queryText" : "Part Number: BQ24105-Q1 Hi, 1. Charging NIMH with bq24105-q1, 3 units in series with 1.2v, the theoretical calculation is 5.1v to charge the battery, but now it has been 4.6v, what is the possible reason? 2. Now the IC is charging the battery all the time and seems not to be in sleep mode. How to judge? 3. When PIN 16 is given to EN signal,VTSB PIN voltage is 3.8v; when PIN 16 is not given to EN signal,VTSB PIN is 3.3v, but the specification defines it as 3.15v. What is the reason? Thanks!", + "partNumber" : " BQ24105-Q1", + "allResponseList" : [ { + "contentId" : "3323517", + "userName" : "Michael Emanuel35", + "rankPoints" : "2055", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 10:16 PM", + "userId" : "4996893", + "content" : "Dear Neal, I see two issues. First, how long is your connection to the battery? To me this sounds like this connection is too long. Your charger is charging the BAT pin to the correct voltage. It then stops the current, the BAT pin relaxes to the real battery voltage (which is not fully charged), and charging resumes. This process occurs all the time, which is why the part is not in sleep mode. Second, if you to charge 3 1.2 V batteries, why are you using 5.1 V for regulation? For your VTSB question, I am worried you are connecting your thermistor wrong. What is the purpose of C914? For the correct operation, one resistor is connected between VTSB and TS. Another resistor is connected from TS to ground, and the thermistor is connected in parallel to that to ground. Thanks, Mike Emanuel Please click \"This resolved my issue\" button if this post answers your question." + }, { + "contentId" : "3325459", + "userName" : "Neal Zhu", + "rankPoints" : "990", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 9:45 AM", + "userId" : "5946274", + "content" : "Hi, Second, if you to charge 3 1.2 V batteries, why are you using 5.1 V for regulation? In the data,the following figure, 3. C914 and R924 are removed, the phenomenon is the same, there is no change, 4. CE enabled or disabled, VTSB TS voltage is variable, that is, the controlled OUT output is not controlled, connected to the battery is 4.6V." + }, { + "contentId" : "3325984", + "userName" : "Michael Emanuel35", + "rankPoints" : "2055", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 4:37 PM", + "userId" : "4996893", + "content" : "Dear Neal, It appears from your schematic that you sense resistor is 3 Ohm. Following the equations in the \"Battery Charge Current\" on page 13 of the datasheet, your charging current is 49 mA. Your VIREG is 147 mV (within the range). Your precharge current is 27 mA. Is this your desired charge current and what is the capacity of the batteries? Thanks, Mike Emanuel Please click \"This resolved my issue\" button if this post answers your question." + }, { + "contentId" : "3327745", + "userName" : "Hill", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 25, 2020 3:19 AM", + "userId" : "4385172", + "content" : "Dear Mike, I am the actual user. My desired charge current is 50mA, and the capacity of the battery is 500mAh. We ecpect the charge time over 10hous. By your suggestion, I notice Iocharge is 150mA ~ 2000mA. Is my desired charge current too small, leading to charge completion? But the indicated leds don't satify datasheet: stat1 and stat2 leds off, PG led on. The battery is charged for 10hours+." + }, { + "contentId" : "3327754", + "userName" : "Hill", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 25, 2020 3:53 AM", + "userId" : "4385172", + "content" : "Neal Zhu Hi, Second, if you to charge 3 1.2 V batteries, why are you using 5.1 V for regulation? In the data,the following figure, 3. C914 and R924 are removed, the phenomenon is the same, there is no change, 4. CE enabled or disabled, VTSB TS voltage is variable, that is, the controlled OUT output is not controlled, connected to the battery is 4.6V. sorry, my description is not inaccurate for Neal 4. CE enabled or disabled, VTSB TS voltage is variable, that is, the controlled OUT output is not controlled.Sense resistor near inductance side is 4.6V, Battery voltage is 3.1~4.2V" + }, { + "contentId" : "3329089", + "userName" : "Michael Emanuel35", + "rankPoints" : "2055", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 4:04 PM", + "userId" : "4996893", + "content" : "Your programmed charge time is for 14.3 hours, which is outside the range of the charge timer. Can you confirm the voltage of STAT1 and STAT2 when the battery voltage stops at 4.6 V? A waveform of STAT1, STAT2, BAT, and IBAT would be helpful. I am wondering if the maximum charge timer of 9.5 hours expired before full voltage is reached because the charge current is too low. The value of the STAT1 and STAT2 pins reported suggest that there is a timer fault. Can you try to increase the charge current such that the charge is finished before expiration of the charge timer and see if regulation charge voltage is reached? As a side note, if you remove R924 and C914, your TS pin will be biased at roughly 86% of bias, suspending charge. Thanks, Mike Emanuel Please click \"This resolved my issue\" button if this post answers your question." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24105_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898849.json b/data/json/DLP/898849.json new file mode 100644 index 0000000000000000000000000000000000000000..f4f1fdf697d9c03e5d90d5c705587cfb3ddee86a --- /dev/null +++ b/data/json/DLP/898849.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "898849", + "reporterName" : "Hide", + "rankPoints" : "17290", + "resolutionStatus" : "Resolved", + "ticketName" : "UCC28070: About QVFF levels(circuit)", + "rankName" : "Guru", + "replies" : " 2", + "views" : " 19", + "queryText" : "Part Number: UCC28070 Hi Team, We have two questions for QVFF levels(circuit). [Q1] We understand that QVFF levels is changed by VINAC peak. When QVFF levels is changed (From level2 to level1), does any problem occur (for example, switching stops etc.)? [Q2] If we change \"VIN\" slowly (“From 85VAC to 265VAC” or “From 265VAC to 85VAC”), Does the change of QVFF levels adversely affect UCC28070 operation (for example, switching stops etc.)? Regards, Hide", + "partNumber" : " UCC28070", + "allResponseList" : [ { + "contentId" : "3323978", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 8:30 AM", + "userId" : "1139254", + "content" : "Hi Hide, The update of the QVFF table does not cause any disruption in the operation of the UCC28070 device.The update will also not be affect by slow varaitions in the input voltage from 85Vac to 265Vac. Page 20, Section 7.3.10 of the datasheet describes the QVFF operation and the advantages it confers over a continuous VFF system. Regards Peter" + }, { + "contentId" : "3324246", + "userName" : "Hide", + "rankPoints" : "17290", + "rankName" : "Guru", + "date" : "Apr 22, 2020 12:59 PM", + "userId" : "1939929", + "content" : "Hi Peter-san, Thank you for your prompt reply. I greatly appreciate your cooperation. Regards, Hide" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC28070" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898852.json b/data/json/DLP/898852.json new file mode 100644 index 0000000000000000000000000000000000000000..a245ab5568105f48173f645728df03293e7a9d49 --- /dev/null +++ b/data/json/DLP/898852.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898852", + "reporterName" : "Sebastian Brueckner", + "rankPoints" : "235", + "resolutionStatus" : "Resolved", + "ticketName" : "AWR1843: Read GPADC without chirping", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 24", + "queryText" : "Part Number: AWR1843 Hi all, we can read the GPADC values by enabling the appropriate monitor and getting an async event after the monitor has run - after e.g. one radar cycle. We need to implement an idle mode where the radar is not chirping (to converse power). Is it possible to still get data from the GPADC? Best regards Sebastian", + "partNumber" : " AWR1843", + "allResponseList" : [ { + "contentId" : "3322904", + "userName" : "Cesar", + "rankPoints" : "52960", + "rankName" : "Guru", + "date" : "Apr 21, 2020 2:08 PM", + "userId" : "20288", + "content" : "Hi The GPADC can perform only ONE MEASURE / Frame during the Frame Idle Time. When the frames are stopped, you can measure the GPADC more often. Thank you Cesar" + }, { + "contentId" : "3324082", + "userName" : "Sebastian Brueckner", + "rankPoints" : "235", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 10:34 AM", + "userId" : "4883331", + "content" : "Hi Cesar, here is my new understanding of how the different GPADC APIs work: rlSetGpAdcConfig() can be used to start an AD conversion while the sensor is not chirping. One async message will be generated per function call. To continuously monitor an external voltage, the API has to be called periodically. While the sensor is chirping, rlSetGpAdcConfig() can not be used (?). Instead rlRfExtAnaSignalsMonConfig() and rlRfAnaMonConfig() are used to enable one AD conversion per monitoring time period. It is not possible to read the GPADCs more than once per monitoring time period. Is this understanding correct? Are there any other ways to access GPADC values that I missed? Thanks!" + }, { + "contentId" : "3328372", + "userName" : "Vivek Dham", + "rankPoints" : "30420", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 6:42 AM", + "userId" : "333578", + "content" : "Hello Sebastian, rlSetGpAdcConfig() can be used once the BSS is powered up. It can be used while frames have not been triggered or frames have been triggered, either cases will work. Once the frames have started the temperature read will happen only during the inter frame time, not while an active chirp is ongoing. Also when frames are started this API is updated only once is a frame. Regards, Vivek" + } ], + "tags" : [ "/support/sensors/f/1023/tags/GPADC%2bmmwavelink", "/support/sensors/f/1023/tags/awr20_5F00_p1_5F00_hwa20_5F00_other", "/support/sensors/f/1023/tags/AWR1843" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898859.json b/data/json/DLP/898859.json new file mode 100644 index 0000000000000000000000000000000000000000..3674543256f55475473f6abf4b8d4f51c2255082 --- /dev/null +++ b/data/json/DLP/898859.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898859", + "reporterName" : "Andy_Lin", + "rankPoints" : "1670", + "resolutionStatus" : "", + "ticketName" : "12 or 48V dual input current balance solution", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 30", + "queryText" : "Hi Team, As title , my customer is surveying the solution as subject for server system application , the spec as below There are two 12 or 48V adapters provide power into system, and customer want to balance these two adapters loading. Adapter 1: 280W, 12 or 48Vout ±5% Adapter 2: 280W, 12 or 48Vout ±5% System: 450W, 48Vin or 12Vin customer original used LTC4370 in as previous project's solution , the previous system adapter is 12Vin, for the new project in needed to support 450W in total , and the Vin might be 48V, Please kindly help to suggest the solution if we have any, 12V or 48Vin are both ok, thanks!", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3324173", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 12:08 PM", + "userId" : "1139254", + "content" : "Hi Andy, Thecompany load share controller, UCC39002, is a different type of controller to the LTC4370. The UCC39002 needs access to the remote sense pins of the output voltage to actively trim the output voltage of Unit A and B to ensure load sharing. Please review the datasheet and see if this is likely to meet the application requirement. Regards Peter" + }, { + "contentId" : "3326816", + "userName" : "Jan Bob", + "rankPoints" : "270", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 8:37 AM", + "userId" : "1687095", + "content" : "Dear Peter, UCC39002 looks good, but can it be used for 48V Vin? Its ADJ pin seem have to link to S+ directly? Best regards, Bob Jan" + }, { + "contentId" : "3326864", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 9:40 AM", + "userId" : "1139254", + "content" : "Hi Bob, I have attached a summary of how the UCC29002 can be used. I slide 8 you can see how the UCC29002 can be used with a higher output voltage. Note the use of resistive dividers will increase the tolerance so the current sharing may have more imbalance. Regards PeterUCC29002 summary.pdf" + } ], + "tags" : [ ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898865.json b/data/json/DLP/898865.json new file mode 100644 index 0000000000000000000000000000000000000000..47ea8dd368225e02f09e024bbe69a3339b52025e --- /dev/null +++ b/data/json/DLP/898865.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898865", + "reporterName" : "Andy_Lin", + "rankPoints" : "1670", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM5050-1: solution ask", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 22", + "queryText" : "Part Number: LM5050-1 Hi Team, my customer is looking for a solution which can fit their system spec as below There will be two input source on system , and will be two spec 1. Vin 12V±5% x2 , Iout 37.5A or 2. Vin 35~60V x2 , Iout 9.375A I think using 2 * LM5050-1 might work for both 2 spec above as this device can support up to 75V, and for the current it needed customer to choose the MOSFET which can support up to 37.5V for spec 1 , 9.375A for spec 2. Not sure if my assume is correct or not , please kindly help for suggestion , thanks! Andy", + "partNumber" : " LM5050-1", + "allResponseList" : [ { + "contentId" : "3323288", + "userName" : "Karikalan Selvaraj", + "rankPoints" : "13870", + "rankName" : "Genius", + "date" : "Apr 21, 2020 6:29 PM", + "userId" : "1601212", + "content" : "Hello Lin, Yes, LM5050-1 would work for both the case for redundancy, please confirm this is for redundancy only and not sharing loads. However for the second case, you mentioned that VIN can vary from 35V to 60V? Can one supply be at 35V and other at 60V? Regards, Kari." + }, { + "contentId" : "3325423", + "userName" : "Andy_Lin", + "rankPoints" : "1670", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 9:01 AM", + "userId" : "5344588", + "content" : "Hi Kari, thanks for reply! For the question you ask, the typ Vin is 48V , 35 and 60V is min and max value." + }, { + "contentId" : "3327773", + "userName" : "Karikalan Selvaraj", + "rankPoints" : "13870", + "rankName" : "Genius", + "date" : "Apr 25, 2020 5:07 AM", + "userId" : "1601212", + "content" : "HI Andy, LM5050-1 or LM5050-2 can both work. If using LM5050-1, connecting Vs pin to IN pin side is recommended, to avoid leakage current flowing from OUT to IN when Vs is connected to OUT pin side. However for high current support, we recommend LM74700-Q1 also (65V maximum rating). Regards, Kari" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM5050_2D00_1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898867.json b/data/json/DLP/898867.json new file mode 100644 index 0000000000000000000000000000000000000000..7fe574f58c403360b05c26c63a10d39148226fed --- /dev/null +++ b/data/json/DLP/898867.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898867", + "reporterName" : "Dylan Zheng", + "rankPoints" : "410", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC2897A: How to understand SS and FB?", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 15", + "queryText" : "Part Number: UCC2897A Hi team, As the datasheet shown, the amplifier output will be the lower voltage of VFB and Vss. How to understand the this amplifier configuration work principle? Thanks", + "partNumber" : " UCC2897A", + "allResponseList" : [ { + "contentId" : "3323126", + "userName" : "John Griffin1", + "rankPoints" : "32175", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 4:10 PM", + "userId" : "1693693", + "content" : "Hi Dylan, The simplified block schematic is intended to show that the output of the opamps is which ever is the lower value of FB or SS/SD pins. I added the resistors (marked in blue) to the block schematic and this is intended to show that the negative input of the top opamp and the positive input of the lower opamp will force the corresponding input to equal the output. Hopefully this gives helps. Remember this is only a visual block schematic of the actual ic design Regards John" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC2897A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898874.json b/data/json/DLP/898874.json new file mode 100644 index 0000000000000000000000000000000000000000..92c6be461406b83245ed0eaea93fd88e97b765be --- /dev/null +++ b/data/json/DLP/898874.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898874", + "reporterName" : "David Guest1", + "rankPoints" : "10", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "WEBENCH® Tools/BQ25892: Webench not recognising part number", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 9", + "queryText" : "Part Number: BQ25892 Tool/software: WEBENCH® Design Tools WEBench doesn't recognise the part", + "partNumber" : " BQ25892", + "allResponseList" : [ { + "contentId" : "3323755", + "userName" : "Ning T", + "rankPoints" : "15365", + "rankName" : "Genius", + "date" : "Apr 22, 2020 4:11 AM", + "userId" : "145100", + "content" : "Hi, Webench tools for battery chargers have been discontinued. Please refer to /support/tools/sim-hw-system-design/f/234/t/857843 for the details. Thanks, Ning." + } ], + "tags" : [ "/support/power-management/f/196/tags/WEBENCH_AE00_%2bDesign%2bTools", "/support/power-management/f/196/tags/BQ25892" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898880.json b/data/json/DLP/898880.json new file mode 100644 index 0000000000000000000000000000000000000000..30abea48e0da4564f8e58051b584d654d738238b --- /dev/null +++ b/data/json/DLP/898880.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "898880", + "reporterName" : "Mark Ackerson", + "rankPoints" : "9465", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ2060: EV2200-60 Software Download", + "rankName" : "Genius", + "replies" : " 6", + "views" : " 31", + "queryText" : "Part Number: BQ2060 Customer needs EV2200-60 software specified in bq2060 EVM (Rev. A) user manual. Please advise. Regards, Mark", + "partNumber" : " BQ2060", + "allResponseList" : [ { + "contentId" : "3323091", + "userName" : "Shirish", + "rankPoints" : "2420", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 3:46 PM", + "userId" : "28063", + "content" : "I have notified the DM team about the missing software on the product page." + }, { + "contentId" : "3326139", + "userName" : "Mark Ackerson", + "rankPoints" : "9465", + "rankName" : "Genius", + "date" : "Apr 23, 2020 6:37 PM", + "userId" : "1823646", + "content" : "Hi Shirish, Any update on the BQ2060 software? Thanks, Mark" + }, { + "contentId" : "3327623", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 24, 2020 10:11 PM", + "userId" : "3528441", + "content" : "Mark, Shirish is trying to work on this with FW team. I'll ping him again on Monday." + }, { + "contentId" : "3327627", + "userName" : "Shirish", + "rankPoints" : "2420", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 10:15 PM", + "userId" : "28063", + "content" : "With help from the DM team, i was able to trace the literature number. We have associated it with the bq2060 product page. The software download link should show up on the product page in 24-48 hours." + }, { + "contentId" : "3327631", + "userName" : "Shirish", + "rankPoints" : "2420", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 10:17 PM", + "userId" : "28063", + "content" : "Hi Mark, Please note that the bq2060 software is 16-bit software and may not run on Windows 10." + }, { + "contentId" : "3328716", + "userName" : "Mark Ackerson", + "rankPoints" : "9465", + "rankName" : "Genius", + "date" : "Apr 27, 2020 12:51 PM", + "userId" : "1823646", + "content" : "Thank Shirish! Regards, Mark" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ2060" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898881.json b/data/json/DLP/898881.json new file mode 100644 index 0000000000000000000000000000000000000000..64ea343a6efe9cf2e5020424dc3ff3324e2b40dc --- /dev/null +++ b/data/json/DLP/898881.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898881", + "reporterName" : "Elisha Tarroza71", + "rankPoints" : "3585", + "resolutionStatus" : "Resolved", + "ticketName" : "UCC28064A: Min and max switching frequency", + "rankName" : "Expert", + "replies" : " 3", + "views" : " 23", + "queryText" : "Part Number: UCC28064A Hello and good day. Is it possible to request for expected the minimum and maximum switching frequency of UCC28064A? The datasheet doesn't seem to have specs. We've found 45kHz in the design requirements as the minimum. But, if I'm not mistaken, this is a user-defined value. May we please request for the expected minimum and maximum limits? Thank you. Regards, Elisha", + "partNumber" : " UCC28064A", + "allResponseList" : [ { + "contentId" : "3323073", + "userName" : "Hong Huang", + "rankPoints" : "18085", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 3:37 PM", + "userId" : "616779", + "content" : "You may look at page 16 of the datasheet to find maximum frequency setup." + }, { + "contentId" : "3324321", + "userName" : "Elisha Tarroza71", + "rankPoints" : "3585", + "rankName" : "Expert", + "date" : "Apr 22, 2020 1:46 PM", + "userId" : "5934597", + "content" : "Thank you, may I ask about the minimum achievable switching frequency as well?" + }, { + "contentId" : "3324403", + "userName" : "Hong Huang", + "rankPoints" : "18085", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 2:28 PM", + "userId" : "616779", + "content" : "Min fsw is based on maximum MOSFET on time. You can refer the datasheet page 8 for these specs and figure out which one is for your design. The converter is in transition mode so you will be able to get min fsw from the IC specs and your converter design results." + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC28064A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898882.json b/data/json/DLP/898882.json new file mode 100644 index 0000000000000000000000000000000000000000..1a042f759b46c3558ae2829dc436eb200c82d0c8 --- /dev/null +++ b/data/json/DLP/898882.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "898882", + "reporterName" : "Serge Maloizel", + "rankPoints" : "380", + "resolutionStatus" : "", + "ticketName" : "BQ34110: bq34110", + "rankName" : "Intellectual", + "replies" : " 5", + "views" : " 24", + "queryText" : "Part Number: BQ34110 Hello My intend is to use bq34110 to do the gas gauge of a 10S NiMH battery. To have the CEDV parameters, I made characterization of my battery and record time, voltage, temperature and current with data logger. Then I put these data in a GPCpackager (File VHTF_10S_GPCPackager attached below) as you request on your web site. Then you send back Gauging Parameter Calculator report but in this report you wrote: \"The following errors were reported by the calculation engine: Accuracy Error: Deviation is so high that it is most likely due to anomaly in the data. Please check that data files have recommended format, units and test schedule\". I checked the data files and as I didn't find what is wrong, I ask for your help. VHTF_10S_GPCPackager.zip", + "partNumber" : " BQ34110", + "allResponseList" : [ { + "contentId" : "3323075", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 3:37 PM", + "userId" : "1864278", + "content" : "We will take a look at your data and then get back to you. Andy" + }, { + "contentId" : "3323182", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 5:04 PM", + "userId" : "1864278", + "content" : "Can you also share the GPC report you have received? Thanks. Andy" + }, { + "contentId" : "3325288", + "userName" : "Serge Maloizel", + "rankPoints" : "380", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 6:21 AM", + "userId" : "4295504", + "content" : "Hello Attached GPC Report VHTF_10S_GPCPackager-report.zip" + }, { + "contentId" : "3326302", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 10:03 PM", + "userId" : "1864278", + "content" : "Thanks for the GPC report. I have been quite busy this week. Allow me to spend some time on your issue. I should be able to provide my feedback early next week. Thanks. Andy" + }, { + "contentId" : "3326721", + "userName" : "Serge Maloizel", + "rankPoints" : "380", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 6:47 AM", + "userId" : "4295504", + "content" : "Hello OK I understand, with COVID-19, thinks are less simple. Be in good health Serge" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ34110" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898883.json b/data/json/DLP/898883.json new file mode 100644 index 0000000000000000000000000000000000000000..a7683b9871435de817bfb14f510a0a3f85160265 --- /dev/null +++ b/data/json/DLP/898883.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898883", + "reporterName" : "Jieyi Zhu", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM5122-Q1: Can this IC operate with 5V steady state VCC voltage?", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 22", + "queryText" : "Part Number: LM5122-Q1 Hello, Can this IC operate with 5V Steady state VCC voltage? The purpose is using this IC directly driving GaN FETs. Is VIN pin allowed not to connect to the real input voltage but connect together with the VCC Pin to an external 5V or 5.5V VCC voltage? Thank you very much. Best Regards Jieyi Zhu", + "partNumber" : " LM5122-Q1", + "allResponseList" : [ { + "contentId" : "3323546", + "userName" : "Richard Fu22", + "rankPoints" : "2925", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 11:07 PM", + "userId" : "5003147", + "content" : "Hi Jieyi, VIN pin is used as the input to the internal VCC regulator. It can be connected to a voltage higher than what the VCC regulator will output, which is part of the intended operation. The other outcome is powering VCC from a voltage in between 9V - 14.5V in series with a diode, with a blocking diode in series from the VIN supply to VIN pin. For your case, I would not recommend shorting VIN and VCC together. Thanks, Richard" + }, { + "contentId" : "3326886", + "userName" : "Jieyi Zhu", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 10:00 AM", + "userId" : "5197634", + "content" : "Hi Richard, Thank you for your answer. I understand the function of the VIN pin. When I use external VCC supply only, is actually VIN pin not really necessary. And I also don't want let it Floating. That's why I would like to short it to VCC pin. In this way, can I just externally supply 5V/ 5.5V DC voltage to VCC Pin? Would this IC operate correctly? Thank you. BR Jieyi" + }, { + "contentId" : "3329212", + "userName" : "Richard Fu22", + "rankPoints" : "2925", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 5:08 PM", + "userId" : "5003147", + "content" : "Hi Jieyi, In order to disable the internal regulator, you must supply a voltage higher than VCC regulation target (9V/lit/an/slua779b/slua779b.pdf?ts=1587746038475 I'm glad you've figured it out." + } ], + "tags" : [ "/support/power-management/f/196/tags/UCD3138A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898898.json b/data/json/DLP/898898.json new file mode 100644 index 0000000000000000000000000000000000000000..60d6c659ffb59970bbea39215f1d89b8620df861 --- /dev/null +++ b/data/json/DLP/898898.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898898", + "reporterName" : "David Smedberg", + "rankPoints" : "30", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC28730: won't start switching and regulating the output", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 12", + "queryText" : "Part Number: UCC28730 Hello, I'm currently trying to implement the UCC28730 circuit in to the acompany reference design 40V-1000Vin 15 Vout but modified to 24 V output instead. I have changed resistor values to match the datasheet of UCC28730 but it won't start switching when I connect 300 V to HV. I saw that VDD needs to be 21 V to keep the switching going after startup. But it seems like the controller don't start switching at all so it won't give a VDD voltage from the AUX on the transformer. I was reading on a troubleshoot document (/lit/an/slua783/slua783.pdfAlso, do I have to use the wakeup circuit UCC24650 to be able to use UCC28730? Because I am working with a company on my bachelor thesis on this I don't know if I can share the circuit here on an open forum. Any help would mean very much! Best regards David", + "partNumber" : " UCC28730", + "allResponseList" : [ { + "contentId" : "3323229", + "userName" : "Hong Huang", + "rankPoints" : "18085", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 5:39 PM", + "userId" : "616779", + "content" : "You do not have to use UCC24650 together with UCC28730. When VDD reaches its on voltage, you should see three pulses on DRV. If you do not see the three pulses on DRV, your circuit has connection problem so you need to find out. You can follow the trouble shooting notes. It is better you get an EVM to help you learn and understand how the IC works." + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC24650", "/support/power-management/f/196/tags/UCC28730" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898899.json b/data/json/DLP/898899.json new file mode 100644 index 0000000000000000000000000000000000000000..bf01614085d371faf41ef1182d56def0ac59cd9b --- /dev/null +++ b/data/json/DLP/898899.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898899", + "reporterName" : "Josef Alt", + "rankPoints" : "320", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS4H160-Q1: Best High Side Switch for 24V/1A", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 11", + "queryText" : "Part Number: TPS4H160-Q1 My customer is looking for a 4 x 24V High-Side Switch with 1A current limit (better: adjustable). It seems our TPS4H160-Q1 is the best possible option. Or do you have a better idea? Best Regards Josef", + "partNumber" : " TPS4H160-Q1", + "allResponseList" : [ { + "contentId" : "3323426", + "userName" : "Anthony P Pham", + "rankPoints" : "1890", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 8:33 PM", + "userId" : "6169362", + "content" : "Hi Josef, With the information given, the TPS4H160 should be fine. I can verify if there's more inform about the loads on each channel but assuming loads carrying less than 1A, the device will work." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS4H160_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898900.json b/data/json/DLP/898900.json new file mode 100644 index 0000000000000000000000000000000000000000..9b2f094362100a8843628c4800bc50c9d7308195 --- /dev/null +++ b/data/json/DLP/898900.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898900", + "reporterName" : "Cun Lee", + "rankPoints" : "260", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS54202: the VOUT and GND of TPS54202 is shorted immediately when 24V plug in sometimes", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 33", + "queryText" : "Part Number: TPS54202 Hicompany I use TPS54202 to buck from 24V to 5V with about 1A. And now we see some failures that the VOUT and GND of TPS54202 is shorted immediately when 24V plug in sometimes. this failue is not happened at the first Previous times， means those failure boards are worked before. this failure is not happened when 24V is already power on. means those failure boards worked normally if 24V can power oon successfully at that time. So, Could you please help me to check the schematic and layout below? 5V_EN_CTRL is always enable in this discussion. the red is top layer and blue is bottom. Thanks", + "partNumber" : " TPS54202", + "allResponseList" : [ { + "contentId" : "3324652", + "userName" : "Bruce Lu (MCP)", + "rankPoints" : "780", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 4:47 PM", + "userId" : "5032350", + "content" : "Hi Cun, Could you please capture the input voltage waveforms near the IC to check if any overspike during the hot-plug in process? The over spike during the hot-plug-in process may damage IC. You can refer the appnote for more detailed analysis on the overspike during hot-plug in process: Adding a TVS diode and an electrolytic capacitor with more ESR should be the solutions here. For the layout review, I would like to recommend you referring the example below: The input capacitor should be placed as close to the device as possible to minimize trace impedance The 0.1-µF ceramic bypass capacitor should be as close as possible to VIN and GND pins. Keep complete ground plane under the IC Keep the SW trace as physically short and wide as practical to minimize radiated emissions. Thanks." + }, { + "contentId" : "3324709", + "userName" : "Cun Lee", + "rankPoints" : "260", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 5:22 PM", + "userId" : "4953534", + "content" : "Hi Bruce Thanks for you reply I will check the power when plug in and the capacitor also. for Ground, my board is a 6 layer board, and the layer 2 and 5 are both whole Ground plan, so I think the ground is strong enough. From you view, my IND which on bottom side is not a high risk, but the capacitor and something near the VIN should be high risk in my design, right?" + }, { + "contentId" : "3325778", + "userName" : "Bruce Lu (MCP)", + "rankPoints" : "780", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 2:56 PM", + "userId" : "5032350", + "content" : "Hi Cun, Please check my inputs below: SW trace should not route under the IC, or IC will be more easily coupled by this high frequency high dv/dt signal FB trace should keep away from high frequency high dv/dt signal--SW/BST trace. SW trace is too narrow and long, which will lead bad thermal and EMI performance. Keep VIN trace and GND trace wider and closer to IC for small parasitic parameters. I strongly recommend using the layout i attached before. Thanks." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS54202" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898905.json b/data/json/DLP/898905.json new file mode 100644 index 0000000000000000000000000000000000000000..80abf79df147e8edddd813be34a5e00fa643a3cb --- /dev/null +++ b/data/json/DLP/898905.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898905", + "reporterName" : "Matthieu REMY", + "rankPoints" : "10", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UC1525B: Spice model", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 10", + "queryText" : "Part Number: UC1525B Hi, We would like to simulate the stability of our feedback loop. Do you have a Spice model of the UC1525B for that? Regards Matthieu", + "partNumber" : " UC1525B", + "allResponseList" : [ { + "contentId" : "3324167", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 12:04 PM", + "userId" : "1139254", + "content" : "Hi Matthieu, I am sorry to say thatcompany does not have a SPICE model for the UC1525B. The LM25037 is another dual output controller that has SPICE models and may be useful if you need to simulate the power stage operation. /.../toolssoftware Regards Peter" + } ], + "tags" : [ "/support/power-management/f/196/tags/UC1525B" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898906.json b/data/json/DLP/898906.json new file mode 100644 index 0000000000000000000000000000000000000000..91fe9c98030483784b9ebc02f5cf89b63aeed531 --- /dev/null +++ b/data/json/DLP/898906.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898906", + "reporterName" : "junia george", + "rankPoints" : "10", + "resolutionStatus" : "", + "ticketName" : "UCC2897A: UCC2897", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 10", + "queryText" : "Part Number: UCC2897A i tried simulating the below circuit. but Vout is dropping down to zero. Can you please check whether any error is there. the design values are as per WEBENCH.", + "partNumber" : " UCC2897A", + "allResponseList" : [ { + "contentId" : "3324162", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 11:59 AM", + "userId" : "1139254", + "content" : "Hi Junia, Can you print the circuit into a pdf file and post it to the forum. I cannot zoom into see the connections. I would also check the signals around the control loop to see if the COMP pin signal is been driven high when the output voltage falls below the regulation value. Regards Peter" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC2897A", "/support/power-management/f/196/tags/UCC2897" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898911.json b/data/json/DLP/898911.json new file mode 100644 index 0000000000000000000000000000000000000000..aa4574a72b1e59a5e66622927cb0a37553abea94 --- /dev/null +++ b/data/json/DLP/898911.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "898911", + "reporterName" : "Bartosz Reichel1", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS61196: TPS61196 not start correctly with 12V", + "rankName" : "Prodigy", + "replies" : " 17", + "views" : " 56", + "queryText" : "Part Number: TPS61196 Dearcompany Team, Hi, I have question about UVLO and problem with startup. I build device from proposed schematic, everything works perfectly, start nice at around 21V. But if I would like to go down with supply voltage to 12V I have problems. When I have resistors r1 r2 r5 100k 24,9k 100k still everything works correctly (I increment by 1 voltage thus start at around 13V). when I change resistors to r1 r2 r5 100k 24k,9 82k nothing happens, even when I rise voltage up to 21V (enable checked, 33k/10k divider enough for 12V, Voltage on UVLO also), Adding additional capacitor (1uF) refine a little bit more and sometimes TPS start, but sometimes is not acceptable. Should be used other set of resistors (eg. 10k 2.4k 8.2k ?) or ??? Thank you for help.", + "partNumber" : " TPS61196", + "allResponseList" : [ { + "contentId" : "3323686", + "userName" : "Sean Zhou", + "rankPoints" : "17030", + "rankName" : "Genius", + "date" : "Apr 22, 2020 2:43 AM", + "userId" : "3704", + "content" : "Hi Bartosz, Please use our equation 2 in the datasheet to choose the right resistor for the UVLO configuration. What the resistor you have chosen is not right. BR Sean" + }, { + "contentId" : "3324396", + "userName" : "Bartosz Reichel", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 2:25 PM", + "userId" : "1952586", + "content" : "I read, this. What I paste was the last test. Ok new one, calculate from equation for Vstart Vstop 10 8,96 266,666666666666 [k] R1+R5 37,3655607494394 R2 So I choose for R5 200k, 33kx2 for R1 and 37.4k for R2 Starts, but also sometimes (if I \"power\" twice etc.). What I observed when I start them work perfectly if I not discharge (leave for longer time, disconnect from other devices - power supply). Eg. I could block output on power supllay switch of function generator, works till I unplug from PS and Generator. It starts quite good (better but not aceptable) if start voltage is set to 14V or higger If I exchange R1 to 182k like in proposed schematic, start always from around 14V. What should I check ? Thank you Bartosz Reichel" + }, { + "contentId" : "3324454", + "userName" : "Sean Zhou", + "rankPoints" : "17030", + "rankName" : "Genius", + "date" : "Apr 22, 2020 2:55 PM", + "userId" : "3704", + "content" : "Hi Bartosz, The calculate method seems ok, I guess the reason is that it may trigger the current limit with the low input voltage. I think you can check the waveform on \"ISNS\" pin whether it triggers current limit under low supply voltage. BR Sean" + }, { + "contentId" : "3325367", + "userName" : "Bartosz Reichel", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 7:47 AM", + "userId" : "1952586", + "content" : "On ISNS I have puls around 200mV then start oscialtion (in 14V case) in 12V case have pulse also around 200mV and nothing, but when I start with 14V and goes down to 12V everything looks similar like for 14V." + }, { + "contentId" : "3325494", + "userName" : "Sean Zhou", + "rankPoints" : "17030", + "rankName" : "Genius", + "date" : "Apr 23, 2020 10:36 AM", + "userId" : "3704", + "content" : "Hi Bartosz, There is two suggestion for the test: 1. Decrease the PWM duty cycle for the test to achieve a light load to check whether it starts normally; 2. Decrease the LED counts for the test. The suggestion that I proposed is to create a light load condition to check whether it triggers something wrong. BR Sean" + }, { + "contentId" : "3325523", + "userName" : "Bartosz Reichel", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 11:24 AM", + "userId" : "1952586", + "content" : "Thank you, PWN not help (start from 10%) but decresing count helps (start from half, but works with more, now only test chain to prepare / understoot for final one ). Which parameter should be trim in this case (R7 ?). ISET have around 150k now (and fit to this LED). Best Regards Bartosz" + }, { + "contentId" : "3325771", + "userName" : "Sean Zhou", + "rankPoints" : "17030", + "rankName" : "Genius", + "date" : "Apr 23, 2020 2:52 PM", + "userId" : "3704", + "content" : "Hi Bartosz, What's the LED configuration for your test set up? I'm considering maybe it has triggered maximum duty cycle limitation for low Vin and high Vout. Your ISET is too high, and you have set the current to about 32mA for each channel? You 'd better change the output current of each channel above 50mA. Have triy with ISET=98k. BR Sean" + }, { + "contentId" : "3326826", + "userName" : "Bartosz Reichel", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 8:48 AM", + "userId" : "1952586", + "content" : "OK, I made next test, I back to proposed in DS values (200k/182k/24.9k) for which my test setup work. Exchange resistor to 74.5k to have 65mA and plug one of the finall led string which works under 65mA and 47V, nothing happen (old one also with this resistor still works). PWM duty 50%, 5V, 222Hz." + }, { + "contentId" : "3326937", + "userName" : "Sean Zhou", + "rankPoints" : "17030", + "rankName" : "Genius", + "date" : "Apr 24, 2020 11:31 AM", + "userId" : "3704", + "content" : "Hi Bartosz, This is really strange and I don't have much more comments now and please do more test and hope you can find that something that leads to this issue. Anny update please let me know. BR Sean" + }, { + "contentId" : "3326989", + "userName" : "Bartosz Reichel", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 12:34 PM", + "userId" : "1952586", + "content" : "Thank you, next test. I build string array with +/- same voltage. Try to start => nothing. But when I take half, TPS start, then I take next and next and finally whole string works. Then change to final leds and also strart. But if discharge (eg touch output by finger), nope. Where could be a probem ? I try with differ inductor (~ same value, but I start from cheap one then use let say better). Power supply (standard lab ax-6003p) ? Any other idea of test will be welcome ! Best Reagrds Bartosz Reichel" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS61196" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898915.json b/data/json/DLP/898915.json new file mode 100644 index 0000000000000000000000000000000000000000..30db6c056d002ad65fbb8f662183e652f9106759 --- /dev/null +++ b/data/json/DLP/898915.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898915", + "reporterName" : "Edward Lee", + "rankPoints" : "840", + "resolutionStatus" : "", + "ticketName" : "TPS65094: TPS650942 RSMRSTB output glitch", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: TPS65094 Hi Sir, My customer recently encountered a problem with the RSMRSTB output. During startup, there will be a glitch at the RSMRSTB output of TPS650942. They found that it is related to the delay between the supply volage (VSYS) and the enable (PMICEN). If the PMICEN is asserted high right after the rising of VSYS, the glitch occurs. If adding a delay after the rising of VSYS, the glitch disappears. Are there specific timeing requirements beween the supply voltage and the PMICEN? Thanks Sincerely, Edward", + "partNumber" : " TPS65094", + "allResponseList" : [ { + "contentId" : "3323660", + "userName" : "Brian Berner", + "rankPoints" : "26215", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 2:08 AM", + "userId" : "1859421", + "content" : "Edward, When is power applied to V5ANA? There is strict timing requirement between V5ANA and VSYS, but I cannot see in your scope shots when any of the input signals are applied. Please share scope shot using all 4 channels: RSMRSTB VSYS PMICEN V5ANA And then I can provide feedback on what might be causing your issue." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS65094" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898920.json b/data/json/DLP/898920.json new file mode 100644 index 0000000000000000000000000000000000000000..9b5358fcd75651d9584198dfd516f0730ed39396 --- /dev/null +++ b/data/json/DLP/898920.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898920", + "reporterName" : "Danilo Austria", + "rankPoints" : "1030", + "resolutionStatus" : "", + "ticketName" : "TPS61178: Temperature of IC", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 21", + "queryText" : "Part Number: TPS61178 Hi Team, A customer wants to know the temperature of the TPS61178 when charging 2 cells of 3400mAh li-ion battery. The input voltage is 6V to 8.4V, output voltage is 12V and 20V, charging current is between 1.5A to 2A and power output of 20W-30W. Regards, Danilo", + "partNumber" : " TPS61178", + "allResponseList" : [ { + "contentId" : "3324062", + "userName" : "Minqiu Xie", + "rankPoints" : "12515", + "rankName" : "Genius", + "date" : "Apr 22, 2020 10:08 AM", + "userId" : "5303427", + "content" : "Hi Danilo： Please allow me check the system at first. The input is bettery, but they want to charge the battery. Do you mean the system need TPS61178 operate with the reserve current?" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS61178" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898921.json b/data/json/DLP/898921.json new file mode 100644 index 0000000000000000000000000000000000000000..336e053dca786c6336015934b7d75b83380e1bd8 --- /dev/null +++ b/data/json/DLP/898921.json @@ -0,0 +1,71 @@ +{ + "ticketNumber" : "898921", + "reporterName" : "Charles Hymowitz1", + "rankPoints" : "40", + "resolutionStatus" : "", + "ticketName" : "TPS7H2201-SP: TPS7H2201", + "rankName" : "Prodigy", + "replies" : " 7", + "views" : " 25", + "queryText" : "Part Number: TPS7H2201-SP We are evaluating the power integrity on several rails which use the TPS7H2201 in-line. I have checked the model and it does not really have any inductance to speak of in the Vin-Vout path. Can you please tell me the total inductance from the input to the output (Vin to Vout)?", + "partNumber" : " TPS7H2201-SP", + "allResponseList" : [ { + "contentId" : "3323396", + "userName" : "Daniel Hartung", + "rankPoints" : "11030", + "rankName" : "Genius", + "date" : "Apr 21, 2020 7:52 PM", + "userId" : "4713414", + "content" : "Hey Charles, The TPS7H2201-SP inline parasitic inductance isn't something that can be disclosed. Are you seeing issues with ringing on the input or output? I imagine that the resistance of the device dampens the ringing you would generally see from the parasitic inductance from the device. Thanks, Daniel" + }, { + "contentId" : "3323437", + "userName" : "Charles Hymowitz1", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 8:40 PM", + "userId" : "6129460", + "content" : "Daniel Thanks for your quick response, but I am not sure I am conveying the ramifications or question. First, the parameter I am looking for I can simply measure in the on state (impedance). I was hoping to not have to sacrifice a device to get the data. So, I am not what you mean by can't be disclosed (given it can be measured). Second, since this is an inline device its total inductance is critical to the power integrity assessment and the PDN impedance flatness and therefore the entire power rail impedance performance. Really, this parameter should be in the datasheet since to use it a designer needs that number." + }, { + "contentId" : "3324784", + "userName" : "Daniel Hartung", + "rankPoints" : "11030", + "rankName" : "Genius", + "date" : "Apr 22, 2020 6:25 PM", + "userId" : "4713414", + "content" : "Hey Charles, I will be more clear on why my initial response was we can't disclose that information publicly. The way that I would think of to find the parasitic inductance of the device while still being able to neglect the parasitic of any layout/board/trim would reveal quite a bit about the internals of the device. This was the first method I thought of as measuring parasitic inductance with the device not on a board, but turned on seems difficult. If you are okay with us measuring the parasitic inductance with the device on a board, that is more achievable, but given how small I expect it to be I would imagine the sources of error we would encounter would be large. (I'm also moderately curious how difficult this would be with both powering my board while trying to use the large device I have to measure the impedance) The short of it is a question and a comment; Q: Are you okay with the device impedance being measured on the board? C: Make sure to understand if we do measure this, it will be specific to that layout/board/trim. (I would use the EVM for the part if you want to see what the board would look like) Thanks, Daniel" + }, { + "contentId" : "3324960", + "userName" : "Charles Hymowitz1", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 10:33 PM", + "userId" : "6129460", + "content" : "Daniel A measurement would be great. so thank you. Yes, it has to be with a board and the EVM is fine. We will have to de-embed the measurement so if you could send us the measurement and either the board or (preferably) the EVM ODB++ files, so we could do the de-embedding." + }, { + "contentId" : "3326169", + "userName" : "Daniel Hartung", + "rankPoints" : "11030", + "rankName" : "Genius", + "date" : "Apr 23, 2020 7:31 PM", + "userId" : "4713414", + "content" : "Hey Charles, I unfortunately found out the instrument I planned to use wouldn't work while the device was one, however I was able to get an agreement that we would be able to disclose an approximation of the parasitic inductance from our design simulations. We found there to be approximately (but less than) 20 nH of parasitic inductance using the trim and form specification used with the attached ODB Hopefully this is sufficient. Thanks, DanielSLHR008A_ODB.zip" + }, { + "contentId" : "3326224", + "userName" : "Charles Hymowitz1", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 8:43 PM", + "userId" : "6129460", + "content" : "20nH is a bit more than we expected but ok. Can you explain how you got 20nH a bit better? You say you have the inductance based on simulations but then you say \"We found there to be approximately (but less than) 20 nH of parasitic inductance using the trim and form specification used with the attached ODB.\" where on the PDB are the from/to points? Is it from the Vin lead end to Vout lead end?" + }, { + "contentId" : "3326230", + "userName" : "Daniel Hartung", + "rankPoints" : "11030", + "rankName" : "Genius", + "date" : "Apr 23, 2020 8:50 PM", + "userId" : "4713414", + "content" : "Hey Charles, This is the VIN trimmed lead end to VOUT trimmed lead end. As I said I am only able to provide an approximation, but we were able to find the value based on our internal package models. These models include lead length + bond wires + die when we run them. There is an actual value it gave us, but since I am unable to give that number I have to say \"less than 20 nH\" Thanks, Daniel" + } ], + "tags" : [ "/support/power-management/f/196/tags/Parasitic%2bInductance", "/support/power-management/f/196/tags/power%2bintegrity", "/support/power-management/f/196/tags/TPS7H2201_2D00_SP" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898922.json b/data/json/DLP/898922.json new file mode 100644 index 0000000000000000000000000000000000000000..160dd747ff9de176ca93ee965ca3805c351911ea --- /dev/null +++ b/data/json/DLP/898922.json @@ -0,0 +1,71 @@ +{ + "ticketNumber" : "898922", + "reporterName" : "user6329412", + "rankPoints" : "40", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS63802: Can't make this part work.", + "rankName" : "Prodigy", + "replies" : " 7", + "views" : " 38", + "queryText" : "Part Number: TPS63802 Hello, I've designed a board that uses a TPS63802. Its input is the output of a BQ24073, which, as I'm sure you already know, is a battery management IC able to automatically adjust the power path depending if the battery is charging or not. From the voltage output of the BQ24073, which may be 3.7V or 4.8V from USB, I need to get 5V. I've chosen the TPS63802 because the max input would be too close from the desired output for a boost regulator to work. Thing is, I've already burnt 6 pieces of it. No matter what I do, the moment I pull the EN pin high, the IC gets instantly hot and the output fixes at 0.4V. I've checked solders, the rest of the circuit, etc. and even done several tests on a naked board where I only soldered this IC an related passives, all with the same results. This is the layout (please note it's the bottom layer of the PCB): Note VOUT_BAT net is the output of the BQ24073. Feedback resistor values are 806k and 91k respectively, as the datasheet states. Inductor is LQH32PNR47NNCL from Murata, I believe it meets the requirements. Input and output caps are CC0603MRX6S5BB226 from Yageo, 22uF. Can anyone lend a hand? I'm really desperate about this :( Best regards, Enrique", + "partNumber" : " TPS63802", + "allResponseList" : [ { + "contentId" : "3323576", + "userName" : "Milos", + "rankPoints" : "7260", + "rankName" : "Expert", + "date" : "Apr 22, 2020 12:14 AM", + "userId" : "5692358", + "content" : "Hi Enrique, Thank you for reaching out. Just to double check, this is the bottom layer seen from top? I see two potential causes for the device to fail: The minimum recommended output capacitance for Vout = 5 V is 7 μF. For CC0603MRX6S5BB226, the effective capacitance at 5 V is only 6.6 μF, which is below the minimum recommended. For Vout = 5 V we recommend using 2x 22 μF. Otherwise the device can become unstable, leading to oscillations and failure, especially when coupled with the second point below. The PCB layout, or the GND routing to be precise, needs significant improvements. Please see the recommended layout in the datasheet and try to follow it as close as possible. In short: First place the input and output capacitors as close as possible to the device. Connect the GND ends of the input/output capacitors, GND and AGND pins directly, under the device. Adding multiple vias is recommended to improve the GND plane impedance and thermals. Place and route the feedback divider. Route all other signals like PG, EN etc. in the end, these are not critical. We cannot stress enough how important is the PCB design for switch-mode converters. Here are some guidelines for a proper PCB layout for boost converters, the same is valid for a buck-boost converter that will operate in boost mode for the most of the time: /lit/an/slva773/slva773.pdf Best regards, Milos" + }, { + "contentId" : "3324104", + "userName" : "user6329412", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 10:52 AM", + "userId" : "6329412", + "content" : "Hi Milos, thanks your your answer. It has given us a bit of insight about this. I've done a few more tests on the PCB I have before making a new one. I've put 4 capacitors on the output and 2 on the input, and found the IC did not burn and gave a fixed voltage of 0.81V (couldn't check the ripple with an oscilloscope because of the Covid lockdown, it's in our lab and I can't get it). Since that was even more strange, I checked the values of the feedback resistors. It seems there was a mix up with the bags and instead of 806k there was a 56k one mounted, so, using the output voltage formula present on page 19 of the datasheet, it gives 0.8076V. It matches with the test. I replaced the 56k resistor for the correct 806k one and... the IC burned again. It really seems like an stability problem, so I decided to use another, lower value resistor to try to get a lower output than 5V. I used 499k, that should give a voltage pretty close to 3.3V. The result was that the IC did NOT get destroyed, but the output was oscillating between 2.6 and 2.8V. Another important thing I forgot to mention, all this tests have been done without any load. The expected load on the final circuit should be on the hundreds of milliamps at peak (maybe 500 - 600 mA), and an average of 50 - 60 mA. Maybe it's the inductor? Do you think we should replace it for another? In any case, I will redo the layout improving the grounding so you can kindly check it before manufacturing. Best regards, Enrique" + }, { + "contentId" : "3324152", + "userName" : "Milos", + "rankPoints" : "7260", + "rankName" : "Expert", + "date" : "Apr 22, 2020 11:48 AM", + "userId" : "5692358", + "content" : "Hi Enrique, Thanks for the additional info. I doubt that the inductor is the issue here. We have tested the device with lower Isat and higher DCR inductors, and did not see any problems, except for the lower efficiency or lower maximum output current. Could you please show us the output voltage oscillations that you mentioned? Note that in power-save mode (MODE pin set to low, see section 8.4.2 of the datasheet) you should expect the output voltage ripple of around 100 mV. If this is critical, you should operate the part in forced-PWM mode (MODE pin set to high). You can also change the mode during operation, and switch between high efficiency and low noise. And yes, also please send is the updated PCB layout for review. Best regards, Milos" + }, { + "contentId" : "3324416", + "userName" : "user6329412", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 2:35 PM", + "userId" : "6329412", + "content" : "Dear Milos, I've redesigned the layout. Please check if it seems better: I placed GND plane + vias under the IC, removed the copper between the inductor's pads, added an extra footprint for a second output capacitor and moved them right at the output of the IC. I also moved the feedback network. Regarding MODE pad, I've put a closed solder bridge to GND so I can test if it behaves better on power safe or continous PWM mode. Thank you, Enrique" + }, { + "contentId" : "3324431", + "userName" : "Milos", + "rankPoints" : "7260", + "rankName" : "Expert", + "date" : "Apr 22, 2020 2:44 PM", + "userId" : "5692358", + "content" : "Hi Enrique, Looks much better now. Additionally, I would rotate the input capacitor and move it close to the IC. This will reduce the input current loop, which is important when the device operates in buck or buck-boost mode. Best regards, Milos" + }, { + "contentId" : "3328629", + "userName" : "user6329412", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 11:22 AM", + "userId" : "6329412", + "content" : "Hi Milos, I've just received the modified PCBs and wanted to let you know it all works as intended. It was the first time I worked with this type of regulators, so I'm taking it as a lesson learned. Thank you again, Enriquue" + }, { + "contentId" : "3328695", + "userName" : "Milos", + "rankPoints" : "7260", + "rankName" : "Expert", + "date" : "Apr 27, 2020 12:38 PM", + "userId" : "5692358", + "content" : "Hi Enrique, I'm glad it worked out in the end. Let us know if you need any further help. Best Regards, Milos" + } ], + "tags" : [ "/support/power-management/f/196/tags/bq24073", "/support/power-management/f/196/tags/TPS63802" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898926.json b/data/json/DLP/898926.json new file mode 100644 index 0000000000000000000000000000000000000000..1c561e2f54d88dc3fbe76d3818fe062776cb2aeb --- /dev/null +++ b/data/json/DLP/898926.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898926", + "reporterName" : "Larry Larson", + "rankPoints" : "10", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ25505: Ultra-low power operation", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 13", + "queryText" : "Part Number: BQ25505 We designed an energy harvesting device that will generate 0.6V at 100nA (similar to another question on the forum). We could stack several devices to get >2V but are not sure if we can support the BQ25505's total power input requirements. Have several questions about the quiescent current, Vin and Pin. Quiescent current: Average is 325-400nA when Vin is 0V, and Vstor is 2.1V. Over what time period is the 325nA average taken? Is this current approximately continuous or is there a duty cycle? If duty cycle, is it fixed or programmable? Does the BQ circuitry draw that current from any source tied to Vstor (such as a supercap on VBAT_SEC meant to service the load)? If VSTOR < VSTOR_CHGEN, and Vin is 0 or <100mV, how does this affect quiescent current? Is the circuitry effectively ‘off’ at this point until Vin>Vin(CS)? If the circuitry draws current from VSTOR, and the circuit is effectively off when VSTORVSTOR_CHGEN and Vin=0? Quiescent Current Range: With the duty cycle time in ms, my assumption is that the quiescent current draw is effectively 325nA, but what is the actual range of the quiescent current (0-1uA for example)? We could handle 1uA, for example, with a very low duty cycle (e.g., 1% or less). What is the duration of the current draw at the high end of that range (for example, 0.2ms at 1uA)? Datasheet changes The datasheet for the BQ25505 for the evaluation board we bought has been revised since then (version dated September 2013). The most recent revision (Rev F dated March 2019) has some important differences. Vin for cold start changed from 330mV(MIN) to 600mV(TYP)/700mV(MAX). Does this reflect a correction to the specifications or is it a design change? If we order more chips, will they have a 700mV worse case for cold start/normal charging? Same question for minimum power input for cold start and normal charging. Old Pin was 5uW, but the most recent version says it’s 15uW. Voltage and Power Requirements: To make sure I fully understand the Vin and Pin requirements - The Rev F datasheet states Vin of 600mV (TYP). However, my BQ25505 evaluation board successfully enters the cold start and booster charging state with just 340mV. So, again, does the datasheet change reflect a correction to the cold start Vin voltage spec or is this a chip design change (i.e., higher cold start V) that must be considered if we use current production BQ25505 chips? Is the Pin minimum of 15uW (per new DS) a hard number? For example, 15uW would require Iin of 45uA @ 330mV. If we managed to design with an input of >0.6V but with current less than 300nA, could we still meet the Pin requirements using the formula in the datasheet? If 15uW is a hard minimum for Pin, then that is effectively an Iin minimum of 8uA (or 25uA new) @ 0.6V. Thanks for your help in understanding how the BQ chip works and if we can utilize it in our design.", + "partNumber" : " BQ25505", + "allResponseList" : [ { + "contentId" : "3323545", + "userName" : "Jeff F", + "rankPoints" : "88360", + "rankName" : "Guru", + "date" : "Apr 21, 2020 11:06 PM", + "userId" : "8433", + "content" : "Hi Larry, Regarding 1, average time for the Iq measurement is about 2-3 seconds. All measurements are for the boost converter not switching. Regarding 2, measured Iq includes the VRDIV sampling for 4ms every 64ms, during which time the Iq is slightly higher. Otherwise, Iq is constant. Regarding 3, yes, VSTOR powers the chip from whatever source is at VSTOR = VBAT if the internal PFET is closed. Regarding 4, when VSTOR < VSTOR_CHGEN, the main boost circuitry is off so VSTOR doesn't pull Iq. The charger tries to raise VSTOR and VBAT through the internal PFET body diode to VSTOR_CHGEN using the cold start circuit, which is a very low efficiency boost converter. We did not characterize its Iq. Regarding 5, when VSTOR>VSTOR_CHGEN>VBAT_UV, the PFET between VSTOR and VBAT automatically turns on and allows the storage element at VBAT_SEC to power whatever load is at VSTOR, including the IC itself. Regarding Iq range, see d/s figures 8 and 9 for average Iq range. Keep in mind these are for the boost converter not operating (i.e. no input power source). When switching due to input power source, the Iq is higher in order to drive the boost converter FETs. Regarding datasheet change and VIN, PIN requirements, there was no spec change. We found an error in our production testing and discovered we can not consistently produce devices that startup with cold start down to 330mV and with such low PIN. Some devices operate down to 600mV in cold start, especially after sitting for long periods without power, but we cannot warranty that all devices will. The PIN_CS number is typical value and is not tested in production. I have seen the device operate in cold start with much less than 15uW. The value is more of practical number in order for cold start to raise VSTOR =VBAT_SEC to VSTOR_CHGEN in a reasonable time frame. In order to exit cold start (i.e. charge VSTOR up to VSTOR_CHGEN) I always recommend to isolate any resistive loads connected at VSTOR using an external PFET with gate drive by /VB_SEC_ON. Also, you have to consider the leakage current of your storage element, especially if it is a super cap. Regards, Jeff" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25505" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898927.json b/data/json/DLP/898927.json new file mode 100644 index 0000000000000000000000000000000000000000..d8ca502c27e92f96b914751f03a03d25b5c9fef6 --- /dev/null +++ b/data/json/DLP/898927.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "898927", + "reporterName" : "Dudi Sasson", + "rankPoints" : "10", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM61460-Q1: Design calculator", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 11", + "queryText" : "Part Number: LM61460-Q1 Hi, I`ve worked with the document TPS2663x _TPS1663x_Design_Calculator_revB and I wanted to know if there is a similar design calculator for \"LM61460-Q1\". Thanks, Dudi.", + "partNumber" : " LM61460-Q1", + "allResponseList" : [ { + "contentId" : "3323326", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 7:01 PM", + "userId" : "1881345", + "content" : "Hello We have a calculator tool for this product under development at this time. I will ask the engineer responsible when this tool will be available and get back to you shortly. Thanks" + }, { + "contentId" : "3325997", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 4:50 PM", + "userId" : "1881345", + "content" : "Hello I have attached the calculator here. Thanks LM61460 Design Tool.xlsm" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM61460_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898930.json b/data/json/DLP/898930.json new file mode 100644 index 0000000000000000000000000000000000000000..a1df70ed0830ae96e746c9334a08812c26fa8571 --- /dev/null +++ b/data/json/DLP/898930.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "898930", + "reporterName" : "James Morrison30", + "rankPoints" : "230", + "resolutionStatus" : "Resolved", + "ticketName" : "LM3410: LM3410 VFB is Low", + "rankName" : "Prodigy", + "replies" : " 12", + "views" : " 45", + "queryText" : "Part Number: LM3410 Hello, Exact p/n: LM3410XMYE/NOPB in MSOP-8 with thermal pad. I am having issues getting this circuit to behave as expected. I have checked for shorts between each of the pins, and that seems OK. Vin = 3V with Vf(min) = 5V for the LED. For now, the protection circuit has been removed (R13 = 0R, D3 is removed). I notice that Vled measures as 5V (so it is boosting) but the current draw isn't right. With Rfb=390mOhm I would expect that Iled=500mA. But I'm seeing a total current draw of 120mA, including all the other circuitry on the board. So something isn't working right. And I measure about 15mV at pin 5 (FB). I believe that should be around 200mV. How could that be lower? P3 is a 2-pin jumper, right now shorted out. Eventually, I'll use that to verify the LED current. Here is a screenshot of the schematic: Below is a scope shot of the inductor voltage (pin 7): Any pointers on where to look to figure out why the current isn't right? James.", + "partNumber" : " LM3410", + "allResponseList" : [ { + "contentId" : "3323316", + "userName" : "James Morrison30", + "rankPoints" : "230", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 6:52 PM", + "userId" : "645755", + "content" : "Images didn't get pasted in. Here they are again... Inductor Current: Schematic Snippet And R15 is NOT installed..." + }, { + "contentId" : "3323421", + "userName" : "Irwin Nederbragt", + "rankPoints" : "20765", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 8:24 PM", + "userId" : "1880111", + "content" : "Hello, Are you measuring fb from the IC GND to pin 5? Have you looked at the input voltage to make sure it is not drooping? The switching frequency is below 800 KHz, something isn't right there either. Does you layout have a solid ground plane? What is the ground connection on the LED? If that is the heatsink pad check to see if it is isolated. I don't see anything wrong schematic wise. What is LED ON/OFF doing? Best Regards," + }, { + "contentId" : "3323476", + "userName" : "James Morrison30", + "rankPoints" : "230", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 9:15 PM", + "userId" : "645755", + "content" : "Yes, measuring FB to GND measures about 15-20mV when the device is on. LED_ON/OFF is generally static, though there is a case where it's on for 4 seconds then off for 4 seconds. Driving with GPIO of MCU, going pretty close to rail-to-rail when driven. Yes, all routing on top layer. Bottom layer is solid GND. 5 GND vias on center pad to get heat to 2oz bottom plane, though there isn't much of that right now. The LED seems to be connected correctly with GND connections actually connected to GND. Right now I am powering from a power supply with current limit set to 1A. Just tried setting the current limit to 2A, in case there was some sort of spike of current required. But same behaviour -- takes about 100mA @3.5V, where it should take somewhere around 2.5-4W for the LED (0.5mA @ 5-7V). I double checked the pinout in the routing, to make sure pin numbers didn't get messed up on the PCB, but that all looks good too. James." + }, { + "contentId" : "3323493", + "userName" : "Irwin Nederbragt", + "rankPoints" : "20765", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 9:38 PM", + "userId" : "1880111", + "content" : "Hello James, On the LED there is a ground connection per the schematic. The anode and cathode are not tied to ground that's what I was asking, is the GND connection isolated from the other two connections? You can try increasing the input voltage to 4V or so just to see if it behaves different. Are you measuring the voltage at the input of the LM3410? How is the supply connected to the board? Are you using an oscilloscope to measure FB or something else? Best Regards," + }, { + "contentId" : "3323670", + "userName" : "James Morrison30", + "rankPoints" : "230", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 2:21 AM", + "userId" : "645755", + "content" : "Hi Irwin, Yes, that middle connection on the LED is a thermal pad that is electrically isolated from the rest of the part. Right now the LED is right off the board, soldered with wires, so the middle pad is not connected at all. So that's not involved here I don't think. I tried bringing VIN all the way up to 5V without any real difference in results. I thought if maybe the inductor was saturating and that a higher input voltage would reduce the current required. But no luck. And yes, I am measuring at the input of the LM3410. The cable to my power supply isn't too long or skinny, and distribution on the PCB is good, certainly good enough for just ~1A expected in worst case. But good question. I've measured the FB with both oscilloscope and multi-meter. Both give values around the same value. And I've confirmed that I have the part I think I do soldered on. The markings are SSXB which, according to the datasheet, is the LM3410XMY that I intend. Attached is a scope shot of the FB node, with very short ground loop so as to not induce extra ringing. This is with DC coupling, so you can see the average is about 23mV, but there is a very definite noise pattern: Strange indeed." + }, { + "contentId" : "3323672", + "userName" : "James Morrison30", + "rankPoints" : "230", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 2:23 AM", + "userId" : "645755", + "content" : "I should mention, that this last scope shot was with a 6.8uH inductor that is rated up to 3.9A (XAL4030). It has a higher current rating then then 10uH I was using and I think that's a better value anyways. But I still can't get more than about 100mA out of it and the FB voltage is messed up." + }, { + "contentId" : "3323691", + "userName" : "James Morrison30", + "rankPoints" : "230", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 2:46 AM", + "userId" : "645755", + "content" : "I just removed the LED, R12, and R13 and confirmed that the FB node is not shorted to GND (hard to tell with 0.39 ohm resistor). Then soldered back on the components one by one and ensured there is no hard short. Next step is to replace the LM3410. Maybe I connected or removed P3 jumper live during debugging and fried the circuit ??? Not sure what else to try at this point." + }, { + "contentId" : "3323702", + "userName" : "Irwin Nederbragt", + "rankPoints" : "20765", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 2:54 AM", + "userId" : "1880111", + "content" : "Hello James, I would recommend turning the band width limiter off though that is not your problem. I don't think the inductor is saturating, I checked the part and it seemed okay from a quick look. I may go back and check the part out better since I haven't used that inductor family before. The last waveform doesn't make sense from both the frequency and also the wave shape, it should be current ramping up and down, triangular (though that can be from the output capacitor). One thing you can try is to increase the current sense resistor value up to regulate a much lower current to see if it starts to regulate and switch at the correct frequency. One other thing, is the LED emitting light? What is the part number of the LED or if you have the datasheet? Perhaps the load is an issue? Best Regards," + }, { + "contentId" : "3324418", + "userName" : "James Morrison30", + "rankPoints" : "230", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 2:35 PM", + "userId" : "645755", + "content" : "So I swapped out the LM3410 with a new device and things make a lot more sense. Turning on the LED causes Vf~7.5V (which is expected) with a current draw at the power supply of ~1.2A (so ~4.5W). My conclusion is the LM3410 device was damaged. Likely from dynamically removing the jumper while the LM3410 was on. Thanks for your help." + }, { + "contentId" : "3324439", + "userName" : "Irwin Nederbragt", + "rankPoints" : "20765", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 2:50 PM", + "userId" : "1880111", + "content" : "Hello, Yes, that would damage the part, hence the OVP zener for OVP protection. Best Regards," + } ], + "tags" : [ "/support/power-management/f/196/tags/LM3410" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898931.json b/data/json/DLP/898931.json new file mode 100644 index 0000000000000000000000000000000000000000..95b152bb9315ff38268f65121d28611d6a9dc042 --- /dev/null +++ b/data/json/DLP/898931.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898931", + "reporterName" : "MEDJEK Arezki", + "rankPoints" : "100", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM3880: LM3880", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 11", + "queryText" : "Part Number: LM3880 i wanna ask you guys about the resistor devider that could placed with the EN pin. what it is for ? how do we choose the values efficiently ?", + "partNumber" : " LM3880", + "allResponseList" : [ { + "contentId" : "3323416", + "userName" : "yihe", + "rankPoints" : "23920", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 8:19 PM", + "userId" : "303879", + "content" : "Hi There is 7uA current source at the EN pin, you have to take this into consideration when selecting the resistor to ensure that Vcc_enable=1.22V[1+(Ren1/Ren2)] - 7uARen1 Regards Yihe" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM3880" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898944.json b/data/json/DLP/898944.json new file mode 100644 index 0000000000000000000000000000000000000000..88d4617e336e333662af02cbb23045f7562d2065 --- /dev/null +++ b/data/json/DLP/898944.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "898944", + "reporterName" : "Michael Bendzick1", + "rankPoints" : "40", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ27750EVM-837: Reliable source of bqz / srec files for bq27750?", + "rankName" : "Prodigy", + "replies" : " 5", + "views" : " 33", + "queryText" : "Part Number: BQ27750EVM-837 I'm trying to get up and running with the BQ27750EVM-837 for a design with the bq27750, but it has been very frustrating so far. I can find bits of pieces from forum posts with attached bqz or srec files, but nothing on the actual product page. The EVM user guide says \"the user can update the firmware using the latest .srec file for the device downloadable from the product folder of the gauge at \"", + "partNumber" : " BQ27750EVM-837", + "allResponseList" : [ { + "contentId" : "3323388", + "userName" : "Michael Bendzick1", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 7:47 PM", + "userId" : "6273943", + "content" : "Looks like the forum cut off some of my post for some reason. Can someone point me to a regular download place for the bqz and srec files? I also found a link on to bq27750FirmwareBundle-0.05-windows-installer.exe , but Windows doesn't want to run that for me because it is apparently unsigned. Running an unsigned EXE posted to a forum sounds like the beginning of a bad day." + }, { + "contentId" : "3324620", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 4:23 PM", + "userId" : "1864278", + "content" : "As far as I know, these firmware bundle installers in are all not signed. Andy" + }, { + "contentId" : "3325667", + "userName" : "Michael Bendzick1", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 1:51 PM", + "userId" : "6273943", + "content" : "Andy Liu (BMS) As far as I know, these firmware bundle installers in are all not signed. Andy I would feel better if the link to it was on a regularcompany product page instead of just being attached to the forum. Not saying you have any role in the post I saw or control over the website. Just appealing tocompany to make these files easier to find and more trustworthy when found." + }, { + "contentId" : "3326323", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 10:19 PM", + "userId" : "1864278", + "content" : "I see my colleagues are working to add a link to the firmware in the product folder." + }, { + "contentId" : "3329321", + "userName" : "Michael Bendzick1", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 6:26 PM", + "userId" : "6273943", + "content" : "I don't see the bqz or srec files posted to the product page yet, so I don't think this issue can be marked as resolved yet." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ27750", "/support/power-management/f/196/tags/BQ27750EVM_2D00_837" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898945.json b/data/json/DLP/898945.json new file mode 100644 index 0000000000000000000000000000000000000000..67aa5dbea05a91ec432c9e9c879d2f2dc49353cd --- /dev/null +++ b/data/json/DLP/898945.json @@ -0,0 +1,87 @@ +{ + "ticketNumber" : "898945", + "reporterName" : "Ahmet BURMA", + "rankPoints" : "210", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ20Z655-R1: BQ20Z655-R1 charge and discharge control.", + "rankName" : "Prodigy", + "replies" : " 9", + "views" : " 62", + "queryText" : "Part Number: BQ20Z655-R1 Hi guys. I want to ask something. I am using BQ20Z655R1 and i did the following steps in order; 1- Select the .SENC file. 2- Configure the data flash. 3- Calibrate the board without battery pack. 4- Connect battery pack. 5- Enter QMAX value (I know QMAX value). 6- Enable IT. 7- Charge the pack to full !!! But at this point I got stuck. I can't charge the pack. I don't understand what to do. Does the BQ20Z655 have a battery charging feature? if so, is it necessary to apply a constant voltage (between 6V and 25V according to the application note) between p + and p-? I tried this, but I cannot charge the batteries. Charging fet do not turn on. I also cannot discharge the battery. I am connecting a constant load between p+ and p-. But discharge does not start. I think the system doesn't wake up from shutdown mode. I had previously opened a topic. Schema, pcb and other information can be found here. /support/power-management/f/196/t/872879 Could you please, an you help me? Best regards.", + "partNumber" : " BQ20Z655-R1", + "allResponseList" : [ { + "contentId" : "3323479", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 9:18 PM", + "userId" : "1864278", + "content" : "Hi Ahmet, Could you update a screenshot of the SBS tab? I want to see the Flag / Status Bits. Thanks. Andy" + }, { + "contentId" : "3323486", + "userName" : "Ahmet BURMA", + "rankPoints" : "210", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 9:32 PM", + "userId" : "1466441", + "content" : "Hi Andy. This is a SBS table ==> https://imgur.com/98jgTkh" + }, { + "contentId" : "3323535", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 10:48 PM", + "userId" : "1864278", + "content" : "The OT2D bit in Safety Status 2 is set. I see you left the TS2 pin float. Try setting the OT2 Chg Time zero. Andy" + }, { + "contentId" : "3323988", + "userName" : "Ahmet BURMA", + "rankPoints" : "210", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 8:40 AM", + "userId" : "1466441", + "content" : "Hi Andy. You are right. Discharge time of 2nd thermistor (OT2 DSG Time) is set to 2. I changed to \"0\". New SBS table is here ==> https://imgur.com/68D2NVK But I set the temp1 and temp0 (Operation CFG A) bits so that only the 1st thermistor was on. In this case, shouldn't TS2 be passive? ==> https://imgur.com/eCd7kYh But the problem is still not solved. I can not charge and discharge. I set the NR bit in Operation CFG B register and deactivated the PRES pin in first data flash arrangements. Not worked. Then I activated the press pin and tried again. But not worked again." + }, { + "contentId" : "3324789", + "userName" : "Ahmet BURMA", + "rankPoints" : "210", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 6:32 PM", + "userId" : "1466441", + "content" : "Hi Andy. Discharge is working. I changed the operation CFG B bits. NRCHG ==> 1 and NR ==> 1 But charge is not working. I am using max1737 battery charge control IC. Can there be a mismatch? Second problem, I connected a 2 amp load between p + and p-.It worked for about 1 hour and 15 minutes and the battery was completely exhausted. But the discharge did not stop. Finally, the CUV error was activated. I did not fully understand this part. Shouldn't the discharge stop at a certain point (for example. %5 capacity) ? bq20Z655 does not control this situation? Best regards. Edit note: I still could not find how to stop the discharge at the point I want (eg 10%). But I realized that, there are \"TDA Set %\" and \"FD Set %\" variables in SBS Configuration. These variables are as follows; TDA Set % ==> 6 TDA Clear % ==> 10 FD Set % ==> 2 FD Set % ==> 5 While discharging the batteries, i saw that the \"TDA\" bit in \"Battery Status\" is active when the battery capacity drops to 6%. But discharge did not stop. On the other hand, there is a \"CHGFET\" bit inside the \"Operation CFG B variable. With this bit, we can link the charge fet's response to the TCA alarm. If this bit is set, the charge FET turns off when the TCA alarm is active. In any way, can we connect the discharge fet to the TDA alarm?" + }, { + "contentId" : "3326320", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 10:16 PM", + "userId" : "1864278", + "content" : "The discharge FET will not turn off to stop the discharge since the discharge current is high. Are you doing the learning cycle? I suggest you disconnect the load when the terminate voltage is hit. Andy" + }, { + "contentId" : "3326352", + "userName" : "Ahmet BURMA", + "rankPoints" : "210", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 10:42 PM", + "userId" : "1466441", + "content" : "Hi Andy. I don't know what the learning cycle is. I just follow the steps in the application notes. 1- Select the .SENC file. 2- Configure the data flash. 3- Calibrate the board without battery pack. 4- Connect battery pack. 5- Enter QMAX value (I know QMAX value). 6- Enable IT. 7- Charge the pack to full. 8- Let it relax for 2 hours. 9- Discharge the pack to the minimum acceptable voltage. 10- Let it relax for 5 hours. 11- Repeat steps 7 through 10 to achieve maximum impedance table accuracy. Is this learning cycle? You also said \"I suggest you disconnect the load when the terminate voltage is hit\". Did you mean \"Term Voltage\"? If yes, Term voltage is 12000mV. How do i stop the discharge using this?" + }, { + "contentId" : "3327609", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 24, 2020 10:02 PM", + "userId" : "3528441", + "content" : "Hello, Please use GPCCHEM as a first step. Then refer to learning cycle app note on for the second step. Thanks!" + }, { + "contentId" : "3328089", + "userName" : "Ahmet BURMA", + "rankPoints" : "210", + "rankName" : "Prodigy", + "date" : "Apr 26, 2020 1:41 PM", + "userId" : "1466441", + "content" : "Hi kang. You said that; \"Please use GPCCHEM as a first step.\" is this step used to determine the chemical data of the battery? I'm just asking because I'm curious.I have the battery's technical document and MSDS reports. I am using the LG ICR18650 battery and chemical ID code is 0100. Should I still create a data og file using GPCChem? If your answer is yes, I will prepare and send the necessary files (config.txt and romtemp_rel_dis_rel.csv)." + } ], + "tags" : [ "/support/power-management/f/196/tags/bq20z655_2D00_r1", "/support/power-management/f/196/tags/bq20z655" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898947.json b/data/json/DLP/898947.json new file mode 100644 index 0000000000000000000000000000000000000000..14400829a864fd2a0912f2a693acfc023579c64d --- /dev/null +++ b/data/json/DLP/898947.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "898947", + "reporterName" : "Zhihan Zhang", + "rankPoints" : "170", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ40Z50-R2: BQ40Z50-R2 Average Current", + "rankName" : "Prodigy", + "replies" : " 6", + "views" : " 33", + "queryText" : "Part Number: BQ40Z50-R2 Hi, I'm having some questions about the average current measurement. What is the sample period or number for AverageCurrent() measurement? Or how many Current() values if used are contribute to the AverageCurrent() measurement? Another question is for Avg I Last Run. Is this the average current of entire last discharge period or just the last updated average current? Thanks, Zhihan", + "partNumber" : " BQ40Z50-R2", + "allResponseList" : [ { + "contentId" : "3323460", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 9:03 PM", + "userId" : "1864278", + "content" : "Hi Zhihan, Let me take a look at the firmware code and then get back to you. Andy" + }, { + "contentId" : "3323518", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 10:16 PM", + "userId" : "1864278", + "content" : "Hi Zhihan, See my answers below. What is the sample period or number for AverageCurrent() measurement? Or how many Current() values if used are contribute to the AverageCurrent() measurement? [Andy] The AverageCurrent() is based on the Current() and is calculated once per second. A filter like the one below is applied to the Current() to get the AverageCurrent(). y[n] = α y[n - 1] + (1 - α) x[n] Another question is for Avg I Last Run. Is this the average current of entire last discharge period or just the last updated average current? [Andy] It should be the average current from the last discharge cycle. Andy" + }, { + "contentId" : "3323539", + "userName" : "Zhihan Zhang", + "rankPoints" : "170", + "rankName" : "Prodigy", + "date" : "Apr 21, 2020 10:52 PM", + "userId" : "6031918", + "content" : "Hi Andy, Thank you very much for your answers! For the equation, y[n] = α y[n - 1] + (1 - α) x[n], I assume y[n] would be the AverageCurrent() of current second, y[n-1] is AverageCurrent() of previous second, and x[n] is Current() of the current second, right? For Avg I Last Run, is this value related to AverageCurrent() algorithm? Let's say from last cycle, we have 100 Current() and AverageCurrent() values. So for Avg I Last Run, the value would be Sum[Current]/100 or the 100th AverageCurrent() value? Or maybe neither? Thanks, Zhihan" + }, { + "contentId" : "3325000", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 11:57 PM", + "userId" : "1864278", + "content" : "See my comments below. For the equation, y[n] = α y[n - 1] + (1 - α) x[n], I assume y[n] would be the AverageCurrent() of current second, y[n-1] is AverageCurrent() of previous second, and x[n] is Current() of the current second, right? [Andy] Correct. For Avg I Last Run, is this value related to AverageCurrent() algorithm? Let's say from last cycle, we have 100 Current() and AverageCurrent() values. So for Avg I Last Run, the value would be Sum[Current]/100 or the 100th AverageCurrent() value? Or maybe neither? [Andy] Sum[Current]/100." + }, { + "contentId" : "3325999", + "userName" : "Zhihan Zhang", + "rankPoints" : "170", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 4:53 PM", + "userId" : "6031918", + "content" : "Hi Andy, Thank you so much for your answer! I have one more question about the AverageCurrent() algorithm. According to SMBus Data Specification v1.1, AverageCurrent() is returning 1 minute rolling average based on current, which seems to be different from the filter you gave me. Is there any particular reason that you decide use a different filter from SMB data spec? Thanks again for you help! Really appreciate it! Zhihan" + }, { + "contentId" : "3326312", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 10:08 PM", + "userId" : "1864278", + "content" : "Hi Zhihan, Unfortunately, I don't have a good answer to that question. As far as I can tell, the algorithm that calculates the AverageCurrent() is not invented for this part. The same implementation is probably inherited from some old parts. Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ40Z50_2D00_R2" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898948.json b/data/json/DLP/898948.json new file mode 100644 index 0000000000000000000000000000000000000000..b84a1f7fa2f7902486b18568957772d6093d90c4 --- /dev/null +++ b/data/json/DLP/898948.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898948", + "reporterName" : "Louis Han15", + "rankPoints" : "2970", + "resolutionStatus" : "", + "ticketName" : "TPS23521: Request a Design review.", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 24", + "queryText" : "Part Number: TPS23521 Hello I Request a Design review for TPS23521 Attached Schematic File. could you review the layout when providing the layout file? The TPS23521 have Letch protection? TPS23521 Circuit.pdf Best Regards", + "partNumber" : " TPS23521", + "allResponseList" : [ { + "contentId" : "3323765", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 4:23 AM", + "userId" : "4743883", + "content" : "Hi Louis, Thanks for reaching out! There are four sections in the schematic. Are all of them identical ? What kind of transients are expected at the input ? Is input supply is a power supply ? Can you share filled up design sheet /product/TPS23521/toolssoftware to review the design. Best Regards, Rakesh" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS23521" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898955.json b/data/json/DLP/898955.json new file mode 100644 index 0000000000000000000000000000000000000000..581304fc5100b8449508b655eb3827d47f60b671 --- /dev/null +++ b/data/json/DLP/898955.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "898955", + "reporterName" : "Art Mecina", + "rankPoints" : "2950", + "resolutionStatus" : "Resolved", + "ticketName" : "TPPM0301: Similar device", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 19", + "queryText" : "Part Number: TPPM0301 Hello Guys, Good day. Our customer is looking for a device similar to TPPM0301 but has output current of 1.0 to 1.5A and has multiple input VIN too. For the multiple input VIN, I think he is referring to the 5VAUX and 3.3VAUX input sources of the device. There are a lot of LDO that meets his output current requirement but i can't seem to find one that has multiple input VIN. I would appreciate it if you can lend your assistance regarding this. Thanks in advance! Art", + "partNumber" : " TPPM0301", + "allResponseList" : [ { + "contentId" : "3324939", + "userName" : "Wilson Fwu", + "rankPoints" : "1860", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 10:05 PM", + "userId" : "4768114", + "content" : "Hi Art, Unfortunately we don't have anything in in that current range that can support 1-1.5A with multiple input and 1 output A possible option is to use our new TLV752 device which can support 1A and has separate EN pins. You could toggle between the two channels with a FET. Or to use two single LDOs - TLV757P. regards, Wilson" + }, { + "contentId" : "3326219", + "userName" : "Art Mecina", + "rankPoints" : "2950", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 8:28 PM", + "userId" : "5915265", + "content" : "Thanks Wilson! Art" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPPM0301" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898956.json b/data/json/DLP/898956.json new file mode 100644 index 0000000000000000000000000000000000000000..acd9bcb9587795ef7d67fb7761e8b809d61fe4d4 --- /dev/null +++ b/data/json/DLP/898956.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898956", + "reporterName" : "Louis Han15", + "rankPoints" : "2970", + "resolutionStatus" : "", + "ticketName" : "BQ25703A: Recommendation for using Lead Acid Battery", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 23", + "queryText" : "Part Number: BQ25703A Hello we will design a lead acid battery charging schematic using bq25703A. The lead acid battery is HRL1234W.(Attached the Datasheet) Is it available to design a HRL1234W charging circuit with bq25703A? if available, could you provide References Data for lead acid battery? HRL1234W.pdf Best Regards.", + "partNumber" : " BQ25703A", + "allResponseList" : [ { + "contentId" : "3324986", + "userName" : "Tiger Zhou", + "rankPoints" : "610", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 11:30 PM", + "userId" : "1451791", + "content" : "Yes, BQ25703A can be used as lead-acid battery charger. Sorry, we don't have reference data." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25703A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898957.json b/data/json/DLP/898957.json new file mode 100644 index 0000000000000000000000000000000000000000..2f4378f27a82412ea124157282a65e2829db9416 --- /dev/null +++ b/data/json/DLP/898957.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "898957", + "reporterName" : "Tim Grossen", + "rankPoints" : "130", + "resolutionStatus" : "", + "ticketName" : "UCC28630: When using the UCC28630 in a 24VDC supply, increasing the output load shuts the output down.", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 18", + "queryText" : "Part Number: UCC28630 150 ohm load start up 150 ohm load running 10 ohm load- output I changed the mosfet sense resistor from .12 ohm, to .10 ohm. Now output just jumps up then down.", + "partNumber" : " UCC28630", + "allResponseList" : [ { + "contentId" : "3324247", + "userName" : "Eric Faraci", + "rankPoints" : "7685", + "rankName" : "Expert", + "date" : "Apr 22, 2020 12:59 PM", + "userId" : "3729643", + "content" : "Tim If you did not, we recommend you use our excel design calculator /lit/zip/sluc537 to verify that this design can support the entire desired operating range. Table 3. (page 42) of the UCC28630 datasheet has a list of all fault conditions that UCC28630 measures for. If any of them are triggered, UCC28630 will stop operation. Depending on the fault, it will either be a latch fault response (where VDD needs to be removed, which is done by removing the AC input) or auto restart (where once VDD discharges to VDD(reset) (5V typ) before attempting to start up again. When you start up into a 10Ω load, one of these faults may be triggering. I recommend that you measure the key pins during this undesired startup operation to see which one is triggering the fault. Once you identify which fault is being triggered, you can adjust the components that connect to the pin to prevent it from triggering fault shutdown. Best Regards, Eric" + }, { + "contentId" : "3327172", + "userName" : "Tim Grossen", + "rankPoints" : "130", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 3:14 PM", + "userId" : "6315951", + "content" : "We have changed components from the original design : R24= .10 ohm C3/C4= 220 uf (one cap) 22K DRV pull down R18= 28K R30= 32.4K R29= 2.2M Here is the original design schematic: I then did plots of the DC Output, VDD, and CS pins at 150 ohm and 10 ohm load. See the plots below: Then removed R21:" + }, { + "contentId" : "3327405", + "userName" : "Eric Faraci", + "rankPoints" : "7685", + "rankName" : "Expert", + "date" : "Apr 24, 2020 6:02 PM", + "userId" : "3729643", + "content" : "Tim How did you determine these new component values? If you did not, we recommend you use our excel design calculator /lit/zip/sluc537 to calculate what the component values should be. If you have any concerns about using the excel design calculator, we recommend that you use our webench calculator (on the right side of this page /product/UCC28630) to determine what the recommended external component values are. We recommend that you verify all the components you use match the recommendation. Best Regards, Eric" + }, { + "contentId" : "3327420", + "userName" : "Tim Grossen", + "rankPoints" : "130", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 6:12 PM", + "userId" : "6315951", + "content" : "These values are from the Web Bench simulator, 24VDC @ 6A entered in." + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC28630", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2bVout" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898960.json b/data/json/DLP/898960.json new file mode 100644 index 0000000000000000000000000000000000000000..e98efd7c29de9ee31d97be5e95d3a7804dfef981 --- /dev/null +++ b/data/json/DLP/898960.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898960", + "reporterName" : "Vu Tran27", + "rankPoints" : "335", + "resolutionStatus" : "", + "ticketName" : "BQ28Z610: Why does Qmax Pack equal Qmax Cells?", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 24", + "queryText" : "Part Number: BQ28Z610 Hello, I have 2 questions regarding the Qmax after the learning cycle: 1. As in the title, I noticed that the Qmax Pack is the same as Qmax Cell 1 and 2 after the learning cycle. Isn't it should be the sum of Qmax Cell 1 & 2? Is there anything I did wrong here? 2. The Qmax Cells after the learning cycle is about 15% higher than the design capacity of the battery. Is that normal? Thank you!", + "partNumber" : " BQ28Z610", + "allResponseList" : [ { + "contentId" : "3323483", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 21, 2020 9:28 PM", + "userId" : "1864278", + "content" : "See my answers below. a) QMax Pack is the QMax of the whole stack, NOT the sum of Qmax Cell 1 & 2. b) Yes, that is normal. Andy" + }, { + "contentId" : "3323500", + "userName" : "Vu Tran27", + "rankPoints" : "335", + "rankName" : "Intellectual", + "date" : "Apr 21, 2020 9:50 PM", + "userId" : "5355007", + "content" : "a/ Can you explain why the Qmax of the whole stack is different than the sum of Qmax of cell 1 & 2? Because for my case, after learning cycle, as Qmax Pack = Qmax Cell 1 = Qmax Cell 2, the StateOfHealth() = 50% for brand new battery, which is obviously wrong. I am using 2s1p battery." + }, { + "contentId" : "3324954", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 10:25 PM", + "userId" : "1864278", + "content" : "Before the learning cycle, you need to set Qmax Pack, Qmax Cell 1, and Qmax Cell 2 to the design capacity multiplied by the number of parallel cells. After the learning cycle is done, the Qmax Pack should be the smaller value of Qmax Cell 1 and Qmax Cell 2. Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ28Z610" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898964.json b/data/json/DLP/898964.json new file mode 100644 index 0000000000000000000000000000000000000000..863819021232547837cf9b714451b15da5edc1fb --- /dev/null +++ b/data/json/DLP/898964.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898964", + "reporterName" : "Lenio Cacula", + "rankPoints" : "12660", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS2051B: reliability with external 5VDC applied to the output", + "rankName" : "Genius", + "replies" : " 1", + "views" : " 12", + "queryText" : "Part Number: TPS2051B Can the TPS2051B be potentially damaged when 5VDC is applied to its outputs and the device is not powered? I am curious for the transitions not only on the output, but also on the power of the TPS2051B itself. Could there be any specific case that could create a damaging operating condition for the device? I understand that the TPS2051B may or may not prevent reverse current in case the outputs have 5VDC applied to them (it will depend on the enable pin). That is not a concern for this application however. Thank you!", + "partNumber" : " TPS2051B", + "allResponseList" : [ { + "contentId" : "3323682", + "userName" : "Ziv Zhang", + "rankPoints" : "4685", + "rankName" : "Expert", + "date" : "Apr 22, 2020 2:37 AM", + "userId" : "5039499", + "content" : "Hi, The ABS of TPS2051B is 6V. It will not break the part with 5V at output. 1. Don't be out of the range of spec. 2. Input and output cap should be added as required by datasheet. For TI's policy, I will first click resolved button. If you have any other concern, contact me any time. If you think resolved, please help click 'Issue is solved button'. Thanks." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS2051B" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898966.json b/data/json/DLP/898966.json new file mode 100644 index 0000000000000000000000000000000000000000..24d24e3f09049842a691b9572ac01cc15b3d3704 --- /dev/null +++ b/data/json/DLP/898966.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898966", + "reporterName" : "Thomas Relling", + "rankPoints" : "50", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC24612: Gate - Source Waveform from controller", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 13", + "queryText" : "Part Number: UCC24612 Why is the gate - source voltage > 20 V in the SIMPLIS simulation when The Functional Block Diagram shows the highest voltage is 9.5V due to a linear regulator? Why can't SIMPLIS complete a POP Analysis with the UCC24612? I get an error saying there is a problem with a C10 internal to the UCC24612. See the attached PowerPoint for the details. Thanks!Errors with UCC24612 Simulation.pptx", + "partNumber" : " UCC24612", + "allResponseList" : [ { + "contentId" : "3325518", + "userName" : "Ulrich Goerke", + "rankPoints" : "11470", + "rankName" : "Genius", + "date" : "Apr 23, 2020 11:11 AM", + "userId" : "637353", + "content" : "Hello Thomas, Thank you for your interest in the UCC24612 SR controller. The gate drive gets its charge from the REG node inside the IC, and is normally 9.5V. In your simulation set-up, however, you have set an initial condition of 22V on the REG filter cap C3. So the VG output will follow the REG voltage from 22V down to 9.5V eventually, as the charge is transferred from C3 to the Fet gate over many switching cycles. I recommend that you set IC for C3 to 8V, and IC for C1 to 10V (which is your bias source voltage). The POP error message indicates that it is unable to find a repetitive value for an internal capacitor C10. I was able to investigate this cap and found that it is a timer cap of 1pF charged by a 1uA current source to a 2.2V threshold on a comparator that discharges it with a 1-ohm transistor. I believe that this sub-circuit can achieve a periodic value but requires more than 20 cycles to settle to the satisfy the POP accuracy criteria. These criteria can be changed in the POP analysis dialog box. I recommend that you either increase the number of cycles allowed to find the POP or reduce the required accuracy of the repeating value, or both. Regards, Ulrich" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC24612" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898974.json b/data/json/DLP/898974.json new file mode 100644 index 0000000000000000000000000000000000000000..fabfec2c182f2d7abfe42f026313f89705f59390 --- /dev/null +++ b/data/json/DLP/898974.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898974", + "reporterName" : "PACKIA RAJ", + "rankPoints" : "10", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ76940EVM: Schematic ,PCB Editable file is required", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 13", + "queryText" : "Part Number: BQ76940EVM EVM SCHEMATIC , PCB and Gerber editable file is required.", + "partNumber" : " BQ76940EVM", + "allResponseList" : [ { + "contentId" : "3324356", + "userName" : "WM5295", + "rankPoints" : "39810", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 2:03 PM", + "userId" : "17523", + "content" : "Hi Packia, The BQ76940EVM files are available as TIDA-00255 the design files are available as a starting point for a design." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ76940EVM" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898975.json b/data/json/DLP/898975.json new file mode 100644 index 0000000000000000000000000000000000000000..c3e50fdbde4eb69b21b38d2a9788fe7ec75df881 --- /dev/null +++ b/data/json/DLP/898975.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "898975", + "reporterName" : "Takashi Kamijo", + "rankPoints" : "180", + "resolutionStatus" : "", + "ticketName" : "LP38692: Reliability data for LP38692MP-2.5/NOPB", + "rankName" : "Prodigy", + "replies" : " 5", + "views" : " 33", + "queryText" : "Part Number: LP38692 I have a request. I want the reliability data of LP38692MP-2.5 / NOPB. There was no information on thecompany website. /.../home Will you provide it? best regards.", + "partNumber" : " LP38692", + "allResponseList" : [ { + "contentId" : "3323753", + "userName" : "Jason Song", + "rankPoints" : "12645", + "rankName" : "Genius", + "date" : "Apr 22, 2020 4:10 AM", + "userId" : "1505435", + "content" : "Hi Kamijo-san, I have also noticed that the qualification summary for this device is missing, please allow me to investigate and I will get back to you by 4/24. Regards, Jason Song" + }, { + "contentId" : "3323764", + "userName" : "Takashi Kamijo", + "rankPoints" : "180", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 4:22 AM", + "userId" : "1133750", + "content" : "Hi Jason Song-san, I understand. I am waiting for your answer. best regards." + }, { + "contentId" : "3326216", + "userName" : "Jason Song", + "rankPoints" : "12645", + "rankName" : "Genius", + "date" : "Apr 23, 2020 8:24 PM", + "userId" : "1505435", + "content" : "Hi Takashi-san, We have finished our investigation, unfortunately, the qualification data for this device is missing and we could not locate it in the system. Due to the age of the device >10 years, we may not be able to provide the qualification data. Will you please discuss this with your customer and explain the situation and let me know how they say. Regards, Jason Song" + }, { + "contentId" : "3326292", + "userName" : "Takashi Kamijo", + "rankPoints" : "180", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 9:50 PM", + "userId" : "1133750", + "content" : "Hi Jason Song-san It is a problem thatcompany does not provide reliability data. Customers stop using LP38692MP-2.5 / NOPB. Another product has reliability data for a product that is over 10 years old. Isn't it wrong? best regards." + }, { + "contentId" : "3327498", + "userName" : "Jason Song", + "rankPoints" : "12645", + "rankName" : "Genius", + "date" : "Apr 24, 2020 7:44 PM", + "userId" : "1505435", + "content" : "Hi Takashi-san, I apologize but this is not common, all devices are supposed to have qualification data, but for some reason, this particular device's qual data is missing. Is there a particular qualification item that the customer is concerned about? Are they open to a different device? Regards, Jason Song" + } ], + "tags" : [ "/support/power-management/f/196/tags/LP38692", "/support/power-management/f/196/tags/https_3A002F002F00_www-ti-com_2F00_qualificationsummary_2F00_qualsumm_2F00_home_3F00_actionId_3D00_2800_2600_amp_3B00_partNumber_3D00_LP38692MP_2D00_2-5_2F00_NOPB" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898979.json b/data/json/DLP/898979.json new file mode 100644 index 0000000000000000000000000000000000000000..fd75e4f38a8de07c443d674e84c860351f871217 --- /dev/null +++ b/data/json/DLP/898979.json @@ -0,0 +1,79 @@ +{ + "ticketNumber" : "898979", + "reporterName" : "Mark Schulte", + "rankPoints" : "50", + "resolutionStatus" : "", + "ticketName" : "BQ78350-R2-DEVICE-FW: IPSCALE Impact on Current Coulomb Deadband Configuration", + "rankName" : "Prodigy", + "replies" : " 8", + "views" : " 56", + "queryText" : "Part Number: BQ78350-R2-DEVICE-FW We have configured our BQ78350-R2 device to use IPSCALE: 1. However, when the current drops below ~60mA (we noticed this on a change from 100mA -> 60mA), our battery state of charge stays constant, even as battery voltage steadily declines with a near constant current draw. Do we need to scale the following setting as well? Calibration | Current Deadband | 0x4319 | Coulomb Counter Deadband | U1 | 0 | 255 | 38 | 264 nV To set the deadband to 8mA given a 1.25 mOhm resistor, should we set this to the Coulomb Counter Deadband to 4 because 4*10*264nanovolts/1.25milliohms = 8.4milliamps? Thank you! Related: /support/power-management/f/196/t/855302", + "partNumber" : " BQ78350-R2-DEVICE-FW", + "allResponseList" : [ { + "contentId" : "3324463", + "userName" : "Matt Sunna", + "rankPoints" : "24930", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 3:02 PM", + "userId" : "269312", + "content" : "Hi Mark, The Current Deadband does need to be scaled, but not the Coulomb Counter Deadband. All of the data flash parameters that are in units of current (mA, uA) or capacity (mAh, cWh) will need to be scaled. Best regards, Matt" + }, { + "contentId" : "3324637", + "userName" : "Mark Schulte", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 4:38 PM", + "userId" : "5787889", + "content" : "Hi Matt, Thanks for the response. Are there any theories then why \"relative state of charge\" would not be changing when we drop our current draw from 110mA -> 60mA. I've attached two graphs that show the data we're observing. SoC and Voltage with 60mA Draw SoC and Voltage with 110mA Draw I've confirmed our \"current coulomb deadband\" is configured to 38 (0x26) (reading 1 byte from address 0x4319), which I believes should put the current coulomb deadband at about 8mA, given a 1.25milliohm resistor. Thank you!" + }, { + "contentId" : "3324810", + "userName" : "Matt Sunna", + "rankPoints" : "24930", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 7:01 PM", + "userId" : "269312", + "content" : "Hi Mark, After you update the IPSCALE and other parameters that are in units of current/capacity, it is important to run calibration. If the current offset is not calibrated, the problem is 10x worse with the scaling. When you collected this data, did you also read the Current() reported by the device to see if it was accurate? Regards, Matt" + }, { + "contentId" : "3324928", + "userName" : "Mark Schulte", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 9:52 PM", + "userId" : "5787889", + "content" : "Thanks Matt! Yes, we do have the Current() reported. It's showing what we believe to be an accurate measurement of between 30-70mA, with most of the readings reporting 60mA." + }, { + "contentId" : "3325847", + "userName" : "Matt Sunna", + "rankPoints" : "24930", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 3:30 PM", + "userId" : "269312", + "content" : "That's good. I suggest updating all of the current and capacity parameters to incorporate the 10x scaling and then running calibration. If this still does not resolve the issue, I suggest adjusting to Coulomb Counter Deadband to see if it makes a difference. I do not expect it to make a difference if the current offset is calibrated, but it will provide additional clues to see the result. Thanks, Matt" + }, { + "contentId" : "3327708", + "userName" : "Mark Schulte", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 25, 2020 12:52 AM", + "userId" : "5787889", + "content" : "Thanks Matt. I do believe we incorporated 10x scaling in all of our current and capacity parameters. I was not able to run calibration on the units yet, but we did try adjusting the Coulomb Counter Deadband. Upon adjust the Coulomb Counter Deadband, the devices did start properly decreasing State Of Charge. I will continue to collect data on that so we can be sure. Thanks! Mark" + }, { + "contentId" : "3328244", + "userName" : "Mark Schulte", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 3:29 AM", + "userId" : "5787889", + "content" : "Just to follow-up from the previous email, here's some data showing the battery SoC vs. voltage again. This graph is showing the voltage of a single system with three different batteries placed on it. The first battery is from time 0 to the first drop in voltage (teal line) around 1300 minutes. The second battery was from 1300 minutes to second (smaller) drop in voltage (teal line) around 3150 minutes. And the third battery was measured from 3150 minutes to the end. The first battery had \"38\" as the Coulomb Counter Deadband setting, and \"3\" (scaled to 30) as the Current Deadband. The second battery had \"4\" as the Coulomb Counter Deadband setting, and \"1\" (scaled to 10) as the Current Deadband. It was the identical battery as the first battery, with just the two settings changed. The third battery had \"38\" as the Coulomb Counter Deadband setting, and \"3\" (scaled to 30) as the Current Deadband. It was a wholly different battery than the first two in this test. As you can see, the SoC seems to track well on the second battery, with the modified setting, but not track on batteries 1 and 3. Thanks!" + }, { + "contentId" : "3328769", + "userName" : "Matt Sunna", + "rankPoints" : "24930", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 1:21 PM", + "userId" : "269312", + "content" : "Thanks Mark. It will be interesting to see if the Coulomb Counter Deadband adjustment is still needed after the current offset is calibrated. If it still shows the same result after calibration, I will need to ask the firmware engineer to investigate why. Thanks, Matt" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ78350_2D00_R2_2D00_DEVICE_2D00_FW" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898982.json b/data/json/DLP/898982.json new file mode 100644 index 0000000000000000000000000000000000000000..63aaeb8dd6e8439f4c9620f71c5bd0de30419944 --- /dev/null +++ b/data/json/DLP/898982.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "898982", + "reporterName" : "Jonathan Geronga", + "rankPoints" : "3280", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BOOSTXL-TUSS4470: Confirm if this device can detect impurities in milk products and other beverages", + "rankName" : "Expert", + "replies" : " 3", + "views" : " 45", + "queryText" : "Part Number: BOOSTXL-TUSS4470 Hi Team, Our customer is interested in ordering BOOSTXL-TUSS4470 but would like to know if the following application is possible for this device: Does BOOSTXL-TUSS4470 can be used for milk impurities, if yes \"How to select the frequency\" The second question is can we also do the same for \"impurities in beverages\" The customer application is related to this link below but they will use it for milk and beverage products: https://www.youtube.com/watch?v=3rxHC4dU77c&feature=youtu.be Please let me know if you have other questions for the customer. Thanks! Jonathan", + "partNumber" : " BOOSTXL-TUSS4470", + "allResponseList" : [ { + "contentId" : "3325770", + "userName" : "Akeem Whitehead", + "rankPoints" : "21215", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 2:52 PM", + "userId" : "3766999", + "content" : "Jonathan, Yes, in general, the TUSS4470 can be used for concentration / impurity measurements. This type of measurement is achieved by mounting the transducer on the side of the container, and making a side-to-side fixed distance measurement to monitor changes in the the time of flight. The time of flight changes due to the transmission medium properties. In this case, milk is the transmission medium, and the addition or lack of impurities will either increase or reduce the speed of sound, thus affecting the time-of-flight. The longer the fixed distance measurement, the more accurate the measurement will be. Using a high-frequency transducer (>200kHz to 1MHz) is required for this type of application since the measurement distance is assumed to be relatively short (<1m). What are the expected impurities in milk? It is important to understand ahead of time if the amount of impurity and the impurity type itself will yield a significant enough of a change in the speed of sound for a time of flight change. If the impurity has identical transmission medium properties (i.e. same speed of sound as milk), then ultrasonic cannot be used for milk impurity detection." + }, { + "contentId" : "3326562", + "userName" : "Tadilo Bogale", + "rankPoints" : "10", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 3:18 AM", + "userId" : "5964542", + "content" : "Thank you so much for the response. It is indeed helpful. In general, we do not want to limit the impurity type here. We would like to keep it more general (typical ones are if the milk viscosity is modified or solid material is there). Should we use closer to 1M or 200k or should be somewhere in the middle is there. If I am not wrong, sound \\lambda (wavelength) decreases as we increase frequency (speed of sound = lambda * frequency). Is there any advantage to select a particular range of frequencies? (Also how do we select the pulse width)? Any advice on the rule of thumb is indeed useful? We may also need to buy the corresponding transducer? Should we select any arbitrary transducer in (>200k and <1M)? Any information regarding this is really helpful? Thank you" + }, { + "contentId" : "3327693", + "userName" : "Akeem Whitehead", + "rankPoints" : "21215", + "rankName" : "Mastermind", + "date" : "Apr 25, 2020 12:16 AM", + "userId" : "3766999", + "content" : "Tadilo, We don't have enough expertise in this particular application to recommend a specific transducer frequency. In general, as the transducer frequency increases, the accuracy increases, but so does the rate of attenuation. Thus, high frequency transducers are ideal for short range high accuracy applications. Depending on how large your container is, you may want to start with a 200 to 500 kHz option to ensure you are able to maximize the detectable range. Try contacting some transducer manufacturers to request their support/recommendation based on your application, as some transducers are designed for specific applications. Here is a list of example transducer part numbers and manufacturers: PGA460 Transducer & Transformer Listing" + } ], + "tags" : [ "/support/sensors/f/1023/tags/BOOSTXL_2D00_TUSS4470" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898988.json b/data/json/DLP/898988.json new file mode 100644 index 0000000000000000000000000000000000000000..749d4889ac8e00fb60dbb6a4b25862b12327c104 --- /dev/null +++ b/data/json/DLP/898988.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "898988", + "reporterName" : "Scott H.", + "rankPoints" : "30", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ24770: 1S clamped current", + "rankName" : "Prodigy", + "replies" : " 6", + "views" : " 61", + "queryText" : "Part Number: BQ24770 Hello, We have a 1S configuration. We would like to charge at high current when BAT is below BATLOWV threshold, bypassing pre-charge and fast-charge clamps. Can we do this by setting SYSMIN (min sys voltage). If not, is there another register setting for this? From datasheet section 8.6.6, for reference: For 1s charging, the charge current is clamped at 384 mA when battery is below BATLOWV threshold. When battery is between BATLOWV and SYSMIN, the charging current is clamped at 2 A. When battery is above SYSMIN, the charging current follows register setting. Thank you.", + "partNumber" : " BQ24770", + "allResponseList" : [ { + "contentId" : "3324882", + "userName" : "Angelo Zhang87", + "rankPoints" : "6530", + "rankName" : "Expert", + "date" : "Apr 22, 2020 8:31 PM", + "userId" : "5346700", + "content" : "Hi Scott, Unfortunately, there is no clean way to do this. With a 1s configuration, when VBAT < BATLOWV, the pre-charge current is clamped to 384 mA. How high of a pre-charge current do you need, and may I ask why your application requires this? Our charger ICs use a lower pre-charge current in order to safely charge a deeply discharged battery. In many applications, the battery pack has a protector circuit which opens when the battery voltage falls below ~3 V anyway, so the battery should only spend a short time in the pre-charge phase before being fast charged. Best regards, Angelo" + }, { + "contentId" : "3324976", + "userName" : "Scott. H.", + "rankPoints" : "10", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 11:12 PM", + "userId" : "5232466", + "content" : "Hi Angelo, Thank you for writing back. We have a LiFePO4 cell that may get introduced to the charger at 2.5V (Also our protection ckt. limit). We need 4A to charge the cell in our required time, and also need the flexibility to increase the rate in certain situations. Any pre-charge would need to be short lived and as high as possible. The BQ24770 fast charge stage (2A) is too low as well. The trip from 2.5V to BATLOWV then to SYSMIN kills our time budget. Feel free to ask any more questions. Thank you, Scott" + }, { + "contentId" : "3325874", + "userName" : "Angelo Zhang87", + "rankPoints" : "6530", + "rankName" : "Expert", + "date" : "Apr 23, 2020 3:43 PM", + "userId" : "5346700", + "content" : "Hi Scott, Understood, thank you for explaining this. It sounds like a different charger IC may be a better fit for your requirements. Can you please answer the questions below so I can provide further suggestions? Need to charge a 1s LiFePO4 battery At least 4 A charge current Must charge as fast as possible even when the battery voltage is only 2.5 V Charger IC should be host-controlled in order to flexibly change charging parameters on the fly. Do you have a preference between I2C and SMBus communication? What will be the input voltage to the charger IC? Will there be a system load connected to the charger IC output? If so, how much voltage and current will it draw? Any other requirements? Best regards, Angelo" + }, { + "contentId" : "3326532", + "userName" : "Scott H.", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 2:34 AM", + "userId" : "4757229", + "content" : "Hi Angelo, Need to charge a 1s LiFePO4 battery YES At least 4 A charge current YES; 8A MAX Must charge as fast as possible even when the battery voltage is only 2.5 V YES Charger IC should be host-controlled in order to flexibly change charging parameters on the fly. Do you have a preference between I2C and SMBus communication? Host-controlled for charge, charger/host \"left behind\" when load on battery power. SMBus preferred, not critical. What will be the input voltage to the charger IC? 12VDC Will there be a system load connected to the charger IC output? If so, how much voltage and current will it draw? YES: Switcher capable of 2V-5V IN; 3.3V out, 40mW max. load. Thank you again for your attention on this. Scott" + }, { + "contentId" : "3327289", + "userName" : "Angelo Zhang87", + "rankPoints" : "6530", + "rankName" : "Expert", + "date" : "Apr 24, 2020 4:19 PM", + "userId" : "5346700", + "content" : "Hi Scott, Thanks for the information. I believe the simplest solution for your application is a charger from the BQ2419x family, such as the BQ24193. The charge profile is shown below. Here are some key BQ24193 parameters that are relevant to your application: Maximum input operating voltage = 17 V Max charge current = 4.544 A Max precharge current = 2.048 A VREG can be set as low as 3.5 V to accommodate LiFePO4 batteries. The Default BAT_LOWV threshold is 3 V, but this can be changed to 2.8 V through I2C control. Therefore, the BQ24193 will apply the 2 A precharge current until your battery rises above 2.8 V, at which point the full fast-charge current will be applied. The NVDC topology makes it easy to regulate the VSYS rail for your system load. With a traditional topology charger, VSYS can go as high as your adapter voltage (12 V), so you would need a separate buck converter to step VSYS below 5 V. Best regards, Angelo" + }, { + "contentId" : "3328869", + "userName" : "Scott H.", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 2:14 PM", + "userId" : "4757229", + "content" : "Thank you for your help Angelo, we will look into the device family you recommended. Scott" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24770" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898990.json b/data/json/DLP/898990.json new file mode 100644 index 0000000000000000000000000000000000000000..d562da1dfa9a8721b971cf9d280ee2d20c99a9b8 --- /dev/null +++ b/data/json/DLP/898990.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898990", + "reporterName" : "Amelie Zheng", + "rankPoints" : "3660", + "resolutionStatus" : "", + "ticketName" : "TPS61093: How could TPS61093 realize the overvoltage protection？", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 16", + "queryText" : "Part Number: TPS61093 Hi Team, In TPS61093 datasheet, it could realize the overcurrent and overvoltage protection. As for overvoltage protection, how could it realize?", + "partNumber" : " TPS61093", + "allResponseList" : [ { + "contentId" : "3324068", + "userName" : "Minqiu Xie", + "rankPoints" : "12515", + "rankName" : "Genius", + "date" : "Apr 22, 2020 10:16 AM", + "userId" : "5303427", + "content" : "Hi Amelie: Nice to meet you~ :-) When the output voltage exceeds the overvoltage protection (OVP) threshold, the power switch turns off until VO drops below the overvoltage protection hysteresis. There is an detect circuit internal. May I know what's your concern?" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS61093" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898992.json b/data/json/DLP/898992.json new file mode 100644 index 0000000000000000000000000000000000000000..ab87cb6a7505fd261ef9c236a7f58ca97b6b9516 --- /dev/null +++ b/data/json/DLP/898992.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898992", + "reporterName" : "Roy Chou1", + "rankPoints" : "1580", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS63805: Layout for AGND and PGND", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 13", + "queryText" : "Part Number: TPS63805 Hi Team, If we only use double layer to achieve TPS63805 and there is AGND and PGND in the schematic. What is more appropriate layout method? 1. Use ferrite bead to connect AGND and PGND(same layer) , if it's appropriate, what is the appropriate value? 2. Keep AGND in the top layer and use via to connect to bottom layer. (top layer is Power layer V+) Or any suggestion if only use double layer board. Roy", + "partNumber" : " TPS63805", + "allResponseList" : [ { + "contentId" : "3323636", + "userName" : "Milos", + "rankPoints" : "7260", + "rankName" : "Expert", + "date" : "Apr 22, 2020 1:39 AM", + "userId" : "5692358", + "content" : "Hi Roy, I would recommend connecting AGND to the GND star point through vias and a line in the bottom layer, as shown below: Best regards, Milos" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS63805" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898993.json b/data/json/DLP/898993.json new file mode 100644 index 0000000000000000000000000000000000000000..9133eb7d9eca8b934534093ae1d919497fd27659 --- /dev/null +++ b/data/json/DLP/898993.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "898993", + "reporterName" : "Sunny Qin", + "rankPoints" : "4150", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS794: How to make TPS794 output 1.2V", + "rankName" : "Expert", + "replies" : " 4", + "views" : " 22", + "queryText" : "Part Number: TPS794 HI team, How to make TPS794 output 1.2V, there is no description on how to configure R1 R2 and C1 when need output 1.2V. Could you help to share some comments? Thanks. Regards, Sunny", + "partNumber" : " TPS794", + "allResponseList" : [ { + "contentId" : "3323746", + "userName" : "Jason Song", + "rankPoints" : "12645", + "rankName" : "Genius", + "date" : "Apr 22, 2020 3:57 AM", + "userId" : "1505435", + "content" : "Hi Sunny, In the datasheet, on Page 9, equation 2 provides R1 and R2 calculation and the table in Figure 23 also provides two examples for 1.8V and 3.6V outputs. Please let me know if you are having trouble finding the information. Regards, Jason Song" + }, { + "contentId" : "3323824", + "userName" : "Sunny Qin", + "rankPoints" : "4150", + "rankName" : "Expert", + "date" : "Apr 22, 2020 6:03 AM", + "userId" : "3779149", + "content" : "Hi Jason, THansk for for comments, but for 1.2V output, as it`s same with REF, so is it just should output to FB, and then remove R2 and C1? we need your comfrim. Thanks. Regards, Sunny" + }, { + "contentId" : "3324967", + "userName" : "Jason Song", + "rankPoints" : "12645", + "rankName" : "Genius", + "date" : "Apr 22, 2020 10:53 PM", + "userId" : "1505435", + "content" : "Hi Sunny, To get the reference voltage at the output pin, you may simply short FB to the Output, you don't need to put a resistor(R1) in between. So R1, R2, C1 all can be removed once FB is shorting to OUT. Regards, Jason Song" + }, { + "contentId" : "3325097", + "userName" : "Sunny Qin", + "rankPoints" : "4150", + "rankName" : "Expert", + "date" : "Apr 23, 2020 1:55 AM", + "userId" : "3779149", + "content" : "HI Jason, Thanks. Regards, Sunny" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS794" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/898995.json b/data/json/DLP/898995.json new file mode 100644 index 0000000000000000000000000000000000000000..90de58284b7e2795e47e009015f1f4b7ba794cfe --- /dev/null +++ b/data/json/DLP/898995.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "898995", + "reporterName" : "user777540", + "rankPoints" : "550", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ25898D: About ADC Conversion Rate Selection", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: BQ25898D hello, Is the current consumption of the IC different between One shot and 1s Continuous? If the current consumption is different, which one has the higher current consumption? In that case, how much mA will increase? best regards", + "partNumber" : " BQ25898D", + "allResponseList" : [ { + "contentId" : "3324887", + "userName" : "Ning T", + "rankPoints" : "15365", + "rankName" : "Genius", + "date" : "Apr 22, 2020 8:43 PM", + "userId" : "145100", + "content" : "Hi, Please refer to Thanks, Ning." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25898D" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899008.json b/data/json/DLP/899008.json new file mode 100644 index 0000000000000000000000000000000000000000..d44ad5f3330e1e10b90fcd6601d4a9132d5b74b4 --- /dev/null +++ b/data/json/DLP/899008.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899008", + "reporterName" : "Yunkwon Jung", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "IWR1443: IWR1443 SDK 2.o", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 25", + "queryText" : "Part Number: IWR1443 Hello, I'd like to inquire about an incomprehensible phenomenon regarding the internal temperature sensor value of IWR1443. Reading the internal temperature with SDK 2.0 at room temperature, the value of DIG0 is found to be 90℃, which is much higher than other sensors values. All other sensors have values of less than 55℃. Is it normal that the temperature difference is greater than 35℃ at the same Die? If this is normal, we cannot adopt this chip in our application because it easily exceeds the junction temperature 105 ℃ at an ambient temperature of 45 ℃ or more. Best Regards,", + "partNumber" : " IWR1443", + "allResponseList" : [ { + "contentId" : "3324518", + "userName" : "Akash Gondalia", + "rankPoints" : "39385", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 3:29 PM", + "userId" : "4768107", + "content" : "Hi Yunkwon, I believe this is a known issue. We will have more information for you in a few days. Regards, AG" + }, { + "contentId" : "3324541", + "userName" : "CHETHAN KUMAR Y.B.", + "rankPoints" : "11635", + "rankName" : "Genius", + "date" : "Apr 22, 2020 3:36 PM", + "userId" : "75569", + "content" : "Yunkwon Jung, This is not expected, It is not normal to have temperate difference greater than 35 Deg C within the die for a typical chirp configuration, Do you see this phenomenon on other IWR1443 devices? or only on one device? We could expect few degree variations across the die, and it could have different values based on number of Tx and Rx configuration and Chirp configurations. It would be good to take average value the all the temperature sensors. Thanks and regards, CHETHAN KUMAR Y.B." + }, { + "contentId" : "3326430", + "userName" : "Yunkwon Jung", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 12:43 AM", + "userId" : "6248192", + "content" : "Dear CHETHAN KUMAR Y.B., Thank you for your comment. We have checked 4 IWR1443 samples at room temperature.. Two samples have temperature difference of 35℃. Another one has 28℃ difference (DIG0 & DIG1 :82℃, the other sensors : less than 54℃). The last one has 21℃ difference (DIG0 & DIG1 :74℃, the other sensors : less than 53℃). Best Regards, YK Jung" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR1443", "/support/sensors/f/1023/tags/_2300_%2b%2b%2b%2b%2bHardware%2bproblem", "/support/sensors/f/1023/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2bsensor%2boutputs" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899010.json b/data/json/DLP/899010.json new file mode 100644 index 0000000000000000000000000000000000000000..3471878715d6a98518fa52a24ef674f705804904 --- /dev/null +++ b/data/json/DLP/899010.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899010", + "reporterName" : "GARAM AN", + "rankPoints" : "965", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS1HB08-Q1: About TPS1HB08-Q1 Current Limit and Thermal Shutdown", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 28", + "queryText" : "Part Number: TPS1HB08-Q1 Hello all, I could find current limit at 70A and thermal shutdown at 150 degree. When I calculate Junction temp with instruction on the datasheet, Tj = Temp + 32.6 * I * I * Ron = 25 + 32.6 * 20 * 20 * 8m = 170 When peak current is 20A, Junction Temp is over than shutdown limit. Cannot the current be over than 20A?", + "partNumber" : " TPS1HB08-Q1", + "allResponseList" : [ { + "contentId" : "3324672", + "userName" : "Anthony P Pham", + "rankPoints" : "1890", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 4:59 PM", + "userId" : "6169362", + "content" : "Hi, The thermal value RθJA is based on DC values. You mentioned that you were calculating with peak current which may give you inaccurate values for seeing if the operation is valid on the device. So it is correct that if you kept it at 20A, the device would shut off unless the 20A is for a short duration as in the case of inrush currents or short-to-ground which is what allows the device to have high current limits such as 70A. We also recommend using the max RON value when looking at calculating junction temperature (which in the TPS1HB08-Q1’s case is 16-mOhm)" + }, { + "contentId" : "3325018", + "userName" : "GARAM AN", + "rankPoints" : "965", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 12:17 AM", + "userId" : "6098866", + "content" : "So, when I recalculate this, 1. At temp=25 Tj = Temp + 32.6 * I * I * Ron = 25 + 32.6 * 15 * 15 * 16m = 142 The limit that device do not shut off is when current I = 15A? 2. At temp=70 Tj = Temp + 32.6 * I * I * Ron = 70 + 32.6 * 12 * 12 * 16m = 145 The limit that device do not shut off is when current I = 12A? Are those correct? Thank you" + }, { + "contentId" : "3325905", + "userName" : "Anthony P Pham", + "rankPoints" : "1890", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 3:55 PM", + "userId" : "6169362", + "content" : "Hi, Yes, these would be correct (I calculated about 15.48A at 25C and 12.38A at 70C) assuming that these are will be your steady state current loads." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS1HB08_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899019.json b/data/json/DLP/899019.json new file mode 100644 index 0000000000000000000000000000000000000000..43cb4080a989f6882d279946aa3b4e0502a00167 --- /dev/null +++ b/data/json/DLP/899019.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899019", + "reporterName" : "Danny Kwon", + "rankPoints" : "1880", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS62080A: recommend new device which is pin to pin with TPS62080ADSGR", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 13", + "queryText" : "Part Number: TPS62080A Team Can you recommend new device which is pin to pin with TPS62080ADSGR ?", + "partNumber" : " TPS62080A", + "allResponseList" : [ { + "contentId" : "3323932", + "userName" : "Excel Regidor", + "rankPoints" : "4000", + "rankName" : "Expert", + "date" : "Apr 22, 2020 7:50 AM", + "userId" : "5934704", + "content" : "Hi Danny, There is NO P2P alternative for TPS62080ADSGR. But, you can consider TPS62821/822 as a possible options. Best regards, Excel tps6282x.pdf" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS62080A", "/support/power-management/f/196/tags/buck" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899021.json b/data/json/DLP/899021.json new file mode 100644 index 0000000000000000000000000000000000000000..074600ec67c980c44e1cc7b818f6ca36cb656fff --- /dev/null +++ b/data/json/DLP/899021.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899021", + "reporterName" : "Yue TANG", + "rankPoints" : "4690", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ76942: where to find the .bqz file for BQ76942 and 952", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 13", + "queryText" : "Part Number: BQ76942 Hi, My customer can't find the device support from bqstudio, according to the EVM user guide, there is a .bqz file as below capture img. but I can't find this anywhere, would you please help on this , thansk.", + "partNumber" : " BQ76942", + "allResponseList" : [ { + "contentId" : "3324138", + "userName" : "David Hien", + "rankPoints" : "8175", + "rankName" : "Expert", + "date" : "Apr 22, 2020 11:37 AM", + "userId" : "1054107", + "content" : "Hi Yue, You need to use the proper bqStudio version aka BQSTUDIO-TEST. If you click on “get software”, you will see the list of supported devices. BTW another post covered this topic." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ76942", "/support/power-management/f/196/tags/bqStudio" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899023.json b/data/json/DLP/899023.json new file mode 100644 index 0000000000000000000000000000000000000000..cc5c71bf554f6d1da746fc5922034b0efc932c00 --- /dev/null +++ b/data/json/DLP/899023.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899023", + "reporterName" : "dimitry chen", + "rankPoints" : "575", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS61196: what is the minmux duty cycle", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 9", + "queryText" : "Part Number: TPS61196 Hi I want to know what is the minimum duty cycle for PWM I see it can achieve 0.1 Dimming in figure 12. Does the limitation is on ton(min) = 200 ns ?", + "partNumber" : " TPS61196", + "allResponseList" : [ { + "contentId" : "3323687", + "userName" : "Sean Zhou", + "rankPoints" : "17030", + "rankName" : "Genius", + "date" : "Apr 22, 2020 2:44 AM", + "userId" : "3704", + "content" : "Hi Chen, Yes, the minimum PWM pulse is 200ns for TPS61196. BR Sean" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS61196" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899025.json b/data/json/DLP/899025.json new file mode 100644 index 0000000000000000000000000000000000000000..ecd3b74f865ba7313ec3d74e67aa2f35348362cf --- /dev/null +++ b/data/json/DLP/899025.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899025", + "reporterName" : "Songzhen Guo", + "rankPoints" : "550", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM74700-Q1: Application Evaluation for LM74700-Q1", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: LM74700-Q1 Hi Team, LM74700-Q1 is evaluating in customer side. But it's not a regular application scenario, here is the simple schematic: Could you evaluate this for us? Thanks. BR Songzhen Guo", + "partNumber" : " LM74700-Q1", + "allResponseList" : [ { + "contentId" : "3324012", + "userName" : "Karikalan Selvaraj", + "rankPoints" : "13870", + "rankName" : "Genius", + "date" : "Apr 22, 2020 9:10 AM", + "userId" : "1601212", + "content" : "HI LM74700-Q1 can not drive MOSFET in the orientation shared above. This is because, MOSFET is turned off by shorting ANODE to GATE pins. Now ANODE will be DRAIN and shorting DRAIN to GATE , means MOSFET will not be fully off when turned off using enable pin. LM5060 is more suitable for this case. Can you please have a look at LM5060-Q1? Regards, Kari." + } ], + "tags" : [ "/support/power-management/f/196/tags/LM74700_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899031.json b/data/json/DLP/899031.json new file mode 100644 index 0000000000000000000000000000000000000000..175b344721300cf010625d030bd1b2aaaa148035 --- /dev/null +++ b/data/json/DLP/899031.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899031", + "reporterName" : "user4350698", + "rankPoints" : "30", + "resolutionStatus" : "", + "ticketName" : "WEBENCH® Tools/BQ25703A: BQ25703 design issues", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 11", + "queryText" : "Part Number: BQ25703A Tool/software: WEBENCH® Design Tools BQ25703 design issues: 1. Can the maximum input current of BQ25703 be set to 6A? We can only input a maximum current of 4A, and cannot increase the input current. 2. Can BQ25703 achieve the following process: (1) Adapter 12V is connected to the system, when the battery is not connected, VSYS needs to output 12.6V / 4A; (2) Adapter 12V is connected to the system, the battery (3 batteries in series) is also connected to the system, VBAT charges the battery (charge Current 2A, the battery does not supply power to the load), and VSYS supplies 12.6V / 4A to the load; (3) The 12V power of the adapter is cut off, and the load is powered by the battery.", + "partNumber" : " BQ25703A", + "allResponseList" : [ { + "contentId" : "3325009", + "userName" : "Tiger Zhou", + "rankPoints" : "610", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 12:09 AM", + "userId" : "1451791", + "content" : "BQ25703A is a battery charge controller. The maximum input current setting is 6350mA, with max 64mV across ACP and ACN pin, however, the maximum available current may be reduced due to inductor ripple. BQ25703A can support 1) system power without battery 2) system power and battery charging and 3) power up from battery without DC source." + } ], + "tags" : [ "/support/power-management/f/196/tags/WEBENCH_AE00_%2bDesign%2bTools", "/support/power-management/f/196/tags/BQ25703A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899035.json b/data/json/DLP/899035.json new file mode 100644 index 0000000000000000000000000000000000000000..3066e0e0d2139712ec110dd0bfc3e0f736e2246b --- /dev/null +++ b/data/json/DLP/899035.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899035", + "reporterName" : "Liu Yang", + "rankPoints" : "1490", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "PT6304B: device marking", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 13", + "queryText" : "Hi Team, What's the difference between the two PT6304Bs on the picture? More specifically, what's the meaning of 0113XD37 and 04G5059? Best Regards, Tom Liu", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3323754", + "userName" : "LeonardEllis", + "rankPoints" : "52175", + "rankName" : "Guru", + "date" : "Apr 22, 2020 4:10 AM", + "userId" : "584482", + "content" : "Hello Tom, Those would be the LotCode/DateCode markings. For this 20+ year old obsolete power module, there is no documentation available for further interpretation. Regards, ~Leonard" + } ], + "tags" : [ ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899036.json b/data/json/DLP/899036.json new file mode 100644 index 0000000000000000000000000000000000000000..18562f653f76b54be3795b224d559541a667d9a0 --- /dev/null +++ b/data/json/DLP/899036.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "899036", + "reporterName" : "yi xiao", + "rankPoints" : "3675", + "resolutionStatus" : "Resolved", + "ticketName" : "UCC3809-1: diode selection question in flyback slua086 (U-165)", + "rankName" : "Genius", + "replies" : " 6", + "views" : " 26", + "queryText" : "Part Number: UCC3809-1 Hi there, I am learningcompany slua086 , p7-8 talks about three parameters to consider on diode selection in flyback. I have some questions to consult. (1) Quote page8 \"The peak repetitive forward current is equal to the reflected primary peak current. An MBR2535CTL\" . I think when the diode conducting, primay side mosfet is OFF and there should be no primary current, therefore where the \"reflected primary peak current\" comes from? I am confused. (2) some notes said Trr (reverse recovery time) is also important for flyback didoe, but it seems not mentioned in diode section of thi paper. Wouldcompany has any advice ? Thank you!", + "partNumber" : " UCC3809-1", + "allResponseList" : [ { + "contentId" : "3324059", + "userName" : "Colin Gillmor", + "rankPoints" : "22565", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 10:06 AM", + "userId" : "1139376", + "content" : "Hello Yi 1/ \"The peak repetitive forward current is equal to the reflected primary peak current\" and you are of course correct that the two currents do not flow at the same time. Let's say you have 1A peak current in the primary, then the secondary current would be 1*Np/Ns. Here's a diagram - showing a typical primary waveform (blue) and a secondary one (red) - the duty cycle is about 50% and the turns ratio is 2:1 so the secondary current peak is twice that of the primary. Regards Colin" + }, { + "contentId" : "3325035", + "userName" : "yi xiao", + "rankPoints" : "3675", + "rankName" : "Genius", + "date" : "Apr 23, 2020 12:45 AM", + "userId" : "1453327", + "content" : "Thanks Colin, I understand. By the way, do you have any advice on my question 2 ?" + }, { + "contentId" : "3325359", + "userName" : "Colin Gillmor", + "rankPoints" : "22565", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 7:38 AM", + "userId" : "1139376", + "content" : "Hello Yi My apologies - I missed that one. The reverse recovery of the diode comes into play when the MOSFET is turned on and the diode current drops to zero while the MOSFET current increases - at the time arrowed below. It's all very difficult to analyse fully but the basic message is that 'Faster is Better'. When the MOSFET turns on the voltage on the diode reverses. The diode will conduct in the reverse direction for a little while. The losses associated with this can be significant because the reverse voltage across the diode is high. So - 'Faster is Better' - typically one would use so-called 'Fast' or 'Ultra Fast' diodes as the 'default' option (trr < 50ns). At low output voltages Schottky diodes are a good choice - like the MBR2535CTL device you mentioned. The reason is that they are majority carrier devices with very fast reverse recovery. At high voltages you can consider wide bandgap devices like SiC Regards Colin" + }, { + "contentId" : "3326525", + "userName" : "yi xiao", + "rankPoints" : "3675", + "rankName" : "Genius", + "date" : "Apr 24, 2020 2:22 AM", + "userId" : "1453327", + "content" : "Hi Colin, thanks for helping us on this forum for more than once ." + }, { + "contentId" : "3326528", + "userName" : "yi xiao", + "rankPoints" : "3675", + "rankName" : "Genius", + "date" : "Apr 24, 2020 2:25 AM", + "userId" : "1453327", + "content" : "By the way , should you have spare time, would you please help take a look at this thread on my confusions about flyback mosfet drive peak current, and maybe share some of your insights? Thanks again. /support/power-management/f/196/t/898815" + }, { + "contentId" : "3326754", + "userName" : "Colin Gillmor", + "rankPoints" : "22565", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 7:18 AM", + "userId" : "1139376", + "content" : "Hi Yi We can deal with the query about gate drive peak current in the other thread so I will close this one. Regards Colin" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC3809_2D00_1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899040.json b/data/json/DLP/899040.json new file mode 100644 index 0000000000000000000000000000000000000000..4f4a27cf7fd91fab059474e1b8b7b21f0e012955 --- /dev/null +++ b/data/json/DLP/899040.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899040", + "reporterName" : "Vincent Chen64988", + "rankPoints" : "3175", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS62866: TPS628660BYCG sample", + "rankName" : "Expert", + "replies" : " 2", + "views" : " 21", + "queryText" : "Part Number: TPS62866 Hi Team, My customer is design TPS628660BYCG in his SCH but I cannot apply sample incompany Store and this part is still in preview state. 1. When the sample will be ready for applying? 2. What is the MP schedule? Its a emergence case, if we cannot provide above schedule or the sample/MP schedule cannnot meet customer project's schedule then R&D will choose competitor's solution. Please response this questions asap since R&D have to make the final decision by this Friday. Besides, there are two questions need team's comment. 1. Power good is low active, PG pin outputs to high level right after VIN is supplied, correct? 2. After enabling this part, why PG drop to low level for a while before Vout is established? Thanks a lot. Vincent Chen", + "partNumber" : " TPS62866", + "allResponseList" : [ { + "contentId" : "3323997", + "userName" : "Dorian Brillet de Cande", + "rankPoints" : "5365", + "rankName" : "Expert", + "date" : "Apr 22, 2020 8:54 AM", + "userId" : "5350960", + "content" : "Hello Vincent, I will contact you directly via email for further discussion on sampling dates. Thank you very much! Regards, Dorian" + }, { + "contentId" : "3324036", + "userName" : "Dorian Brillet de Cande", + "rankPoints" : "5365", + "rankName" : "Expert", + "date" : "Apr 22, 2020 9:37 AM", + "userId" : "5350960", + "content" : "Hello Vincent, Regarding PG waveform, the pin where this waveform is probed is called VSET/PG/. VSET will allow customer to set output voltage to specific value by populating a certain resistor value. (see details in Table 1 of datasheet). What happens before startup is, a current is sent from VSET to GND through R1. A voltage will result from that, to make sure TPS62866 is doing a proper reading of the outside resistor to set correct output voltage, two current levels are used to double check this value and make sure correct output voltage is supplied. What you see on PG waveform is this behavior, with two voltage levels induced by the two current levels used for reading. Thanks a lot! Regards, Dorian" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS62866" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899044.json b/data/json/DLP/899044.json new file mode 100644 index 0000000000000000000000000000000000000000..88101c64909cad260309c058fed5b7b64fae44ad --- /dev/null +++ b/data/json/DLP/899044.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899044", + "reporterName" : "2018", + "rankPoints" : "2330", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ25611D: Some questions about the D+/D- of BQ25611D?", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 13", + "queryText" : "Part Number: BQ25611D Some questions about the D+/D- of BQ25611D? 1. When plugged into the 25ms of USB, what actions will the D+/D- of BQ25611D make? 2. If BQ25611D can be connected to D+/D- only after 25ms is inserted into the USB, Then will the delay of 25ms affect the normal operation of BQ25611D? 3. When plugged into the USB, how long does BQ25611D need to occupy D+/D- (MAX)? 4. After the end of occupying the USB, will D+/D- still be used in the charging process (unplugged USB or software mandatory configuration)?", + "partNumber" : " BQ25611D", + "allResponseList" : [ { + "contentId" : "3324950", + "userName" : "Hong Mao", + "rankPoints" : "4010", + "rankName" : "Expert", + "date" : "Apr 22, 2020 10:22 PM", + "userId" : "4779728", + "content" : "BQ25611D builds in D+/D- detection. 25ms delay time on D+/D- may be tolerable after VBUS is inserted. After the detection is complete, D+/D- pin inputs are in high impedance mode. Suggest leave 1.5 second for the worst case detection to be complete. After the detection is complete, D+/D- is not occupied any longer." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25611D" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899053.json b/data/json/DLP/899053.json new file mode 100644 index 0000000000000000000000000000000000000000..3653f82629fc427b3fce43ce8da64336835dbc12 --- /dev/null +++ b/data/json/DLP/899053.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899053", + "reporterName" : "YUTAKA CHIBA", + "rankPoints" : "130", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS40210-Q1: TPS40210QDGQRQ1_Confirmation of influence on other pins", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 13", + "queryText" : "Part Number: TPS40210-Q1 Hi Team, I have a question for my customer's request. Please answer to me ASAP. The voltage of 9PIN (VBP) of TPS40210QDGQRQ1 is generated from the internal LDO. Is it possible that the output of this LDO affects other pins? I know that it affects 8PIN (GDRV), but will it affect other pins? Best Regards,", + "partNumber" : " TPS40210-Q1", + "allResponseList" : [ { + "contentId" : "3326377", + "userName" : "Richard Fu22", + "rankPoints" : "2925", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 11:14 PM", + "userId" : "5003147", + "content" : "Hi Yutaka, Sorry for the delayed reply. Regulator output is used in calculating soft-start time and overcurrent start-up. Are there any other pieces of information that can be used for more context? Thanks, Richard" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS40210_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899063.json b/data/json/DLP/899063.json new file mode 100644 index 0000000000000000000000000000000000000000..3ae26d7cda985f7bd68845f6c1b22aa24fcb7e21 --- /dev/null +++ b/data/json/DLP/899063.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899063", + "reporterName" : "Takashi Shinde", + "rankPoints" : "90", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS7A49: Power PAD size", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 11", + "queryText" : "Part Number: TPS7A49 Hello, Based on the data sheet on TPS7A49, I can see 2 types of the power PAD size. Page #33 is 1.89(max)x1.57(max), page #36 is 2.15(max)x1.846(max). Which size should we design the land pattern of PCB? Please advice. regards, Takashi Shinde", + "partNumber" : " TPS7A49", + "allResponseList" : [ { + "contentId" : "3324319", + "userName" : "JCHK", + "rankPoints" : "27915", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 1:46 PM", + "userId" : "1108707", + "content" : "HI Shinde-san, Please use the layout on Page #36. I have submitted a request to clarify the datasheet. Regards," + }, { + "contentId" : "3324996", + "userName" : "Takashi Shinde", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 11:51 PM", + "userId" : "531236", + "content" : "Thanks a lot." + } ], + "tags" : [ "/support/power-management/f/196/tags/tps7a49" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899064.json b/data/json/DLP/899064.json new file mode 100644 index 0000000000000000000000000000000000000000..f55e541ab7f9b7cfd1280f102767aeaa649666bf --- /dev/null +++ b/data/json/DLP/899064.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899064", + "reporterName" : "PAN-M", + "rankPoints" : "7410", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS51604: Output drive current (MAX)", + "rankName" : "Mastermind", + "replies" : " 2", + "views" : " 13", + "queryText" : "Part Number: TPS51604 Hi, Do you have minimum value of resistance? Ex, the typical resistance level of DRVL is 1.5ohm, but there is no mention of the minimum. Regards, PAN-M", + "partNumber" : " TPS51604", + "allResponseList" : [ { + "contentId" : "3324206", + "userName" : "Qian Chen", + "rankPoints" : "21370", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 12:32 PM", + "userId" : "1501908", + "content" : "Hi PAN-M Below is the minimum gate drive resistance. DRVH sourcing resistance: 3ohm DRVH sink resistance: 0.41ohm DRVL sourcing resistance: 0.95ohm DRVL sink resistance: 0.21ohm Thanks Qian" + }, { + "contentId" : "3325044", + "userName" : "PAN-M", + "rankPoints" : "7410", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 1:00 AM", + "userId" : "550882", + "content" : "Thank you for support." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS51604" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899065.json b/data/json/DLP/899065.json new file mode 100644 index 0000000000000000000000000000000000000000..9188793c6f9f1aa1917b0217eb39e1b900ea1942 --- /dev/null +++ b/data/json/DLP/899065.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899065", + "reporterName" : "Mojo", + "rankPoints" : "1480", + "resolutionStatus" : "", + "ticketName" : "TPS62420: output voltage problem on one channel", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 17", + "queryText" : "Part Number: TPS62420 Hello we designed 3.3V and 1.2V for a Delfino uC input voltages. channel 1 is the 3.3V - we get 1.25V channel 2 is the 1.2V - we get 1.2V the diode D8 is to match as much as possible the rise of the voltages for the uC. another point to mention - when power is off, we see a short circuit between the outputs (using buzzer function on a Fluke) - even if we remove the diode D8. The output voltages are pretty smooth without any spikes. the question is how can we debug this device? here is the schematic: In another thread on e2e I saw that it might be an issue of the device itself...here's the device. can you please confirm the marking is ok and this is an original part of TI? Thanks a lot!", + "partNumber" : " TPS62420", + "allResponseList" : [ { + "contentId" : "3324079", + "userName" : "Tanvee", + "rankPoints" : "2555", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 10:28 AM", + "userId" : "5332788", + "content" : "Hi Mojo, The device marking looks okay. A diode used in the schematic is causing a short circuit between two rails. Could you ditch output rails from controller and diode and measure the output voltage of both rails. I need more information on the layout and operating conditions and if possible the waveform of output voltage, inductor current during operation. This iscompany part and this device doesn't have a problem with voltage regulations. Best regards, Tanvee" + } ], + "tags" : [ "/support/power-management/f/196/tags/tps62420%2boutput%2bvoltage", "/support/power-management/f/196/tags/TPS62420" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899067.json b/data/json/DLP/899067.json new file mode 100644 index 0000000000000000000000000000000000000000..7661eede7fc9dec42a1c42a73d74f392f0997399 --- /dev/null +++ b/data/json/DLP/899067.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899067", + "reporterName" : "Mihir Gupta65", + "rankPoints" : "2135", + "resolutionStatus" : "", + "ticketName" : "LM74700-Q1: -48V ORing?", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 11", + "queryText" : "Part Number: LM74700-Q1 Team, Can the LM74700-Q1 drive FETs in a -48V configuration. The customer wants to replace the GE PIM400. See blockdiagram below: Regards Mihir", + "partNumber" : " LM74700-Q1", + "allResponseList" : [ { + "contentId" : "3323860", + "userName" : "Karikalan Selvaraj", + "rankPoints" : "13870", + "rankName" : "Genius", + "date" : "Apr 22, 2020 6:29 AM", + "userId" : "1601212", + "content" : "Hi LM74700 is not suitable for negative ORing, but LM5051 is negative ORing controller. But if you wish to use LM74700-Q1 on the GND side with -48V common bus then it can work. Could you share more light on this one? Regards, Kari." + } ], + "tags" : [ "/support/power-management/f/196/tags/LM74700_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899068.json b/data/json/DLP/899068.json new file mode 100644 index 0000000000000000000000000000000000000000..fd40a275616c7ff703759cf3753748f074a0eafb --- /dev/null +++ b/data/json/DLP/899068.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899068", + "reporterName" : "Dejan Hrovatin", + "rankPoints" : "350", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ76920: some type of isolation needed?", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 11", + "queryText" : "Part Number: BQ76920 Hello, below is attached simplified schematic how to use BQ76920: Because I don't need to use CHG/DSG and current measure functionality, can I left pins CHG, DSG, SRP and SRN pins just floating or do you recommend to use external pull down resistor (for ex. 1 MOhm)? Consequently this means that PACK- symbol on schematic above will be connected directly to GND (the same as GND of mCU, BQ76920 and GND of first battery cell). Exactly - for measurements balancer connector of LiPo battery will be used, the load will be then connected to the main wires of the battery. But because the GND in balancer connector is on the same potencal as GND which is part of battery main connection, I'm worry that some type of return current path will establish also via GND line (and will affect with the measurements) which goes through balancer connector. Please note that mCU which will be in use for communication with BQ76920, will be also in use for controling the main load. Would you suggest to use some type of isolation here (I2C isolation) to disconnect GND which comes from balancer connector from GND which comes around via main wires? - in that example GND of first cell and of BQ76920 will come through the balancer connector, the other part of circuit will be isolated via I2C isolation. Many thanks!", + "partNumber" : " BQ76920", + "allResponseList" : [ { + "contentId" : "3324405", + "userName" : "WM5295", + "rankPoints" : "39810", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 2:28 PM", + "userId" : "17523", + "content" : "Hi Dejan, SRP and SRN are inputs and should be connected to VSS of the IC. Normally you can route these directly to VSS, if you have a long routing path and expect a large signal may be coupled onto the traces 100 ohm as shown in the diagram is ok. DSG and CHG are outputs and may be left open, they will be pulled low by the driver when the part is on. If you keep the part in shutdown and are concerned about signals induced on the pins a 1M pull down to VSS is ok. Shorting the outputs directly to VSS is not usually recommended since it will draw a lot of current if software ever turned on the pins. The pins can be safely shorted and software should never turn them on if you do choose to short them. Isolation may be required by your system specifications, or from desire to control currents as you describe. In low voltage systems it is often avoided unless necessary since it adds cost and current consumption which is undesired in a battery powered system. Check your regulatory requirements, but in general I would expect your GND connection may be low resistance. If the MCU is referenced to the system load the I2C lines may be modulated by the current in the return path. When tolerable this is often allowed to reduce the voltage margin on the interface. If it is large enough to induce communication errors then isolation may be desired." + } ], + "tags" : [ "/support/power-management/f/196/tags/isolation", "/support/power-management/f/196/tags/BQ76920" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899069.json b/data/json/DLP/899069.json new file mode 100644 index 0000000000000000000000000000000000000000..3f1d3c191ae46c42f95e070f4a044ee023ec506b --- /dev/null +++ b/data/json/DLP/899069.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899069", + "reporterName" : "Manfred Weiskopf", + "rankPoints" : "20", + "resolutionStatus" : "Resolved", + "ticketName" : "WEBENCH® Tools/LMR14206: Cboot: Voltage ?", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 13", + "queryText" : "Part Number: LMR14206 Tool/software: WEBENCH® Design Tools Hello, on the Demoboards and in the Webbench Designercompany recomments for the Cboot-Capacitor Parts with max. voltages from 10V to 16V. All Designs work with Inputvoltages greater 20V The Cboot is connected to the SW-Output. At the SW-Output you measure voltage differences from appoximately the Vin-Voltage, >20V. Questions: Which max. voltages do you measure accross Cboot ? Should the max. voltage for the CB-Capacitor be greater than the voltage of Vin (example 35V or 50V) ?? Kind regards Manfred", + "partNumber" : " LMR14206", + "allResponseList" : [ { + "contentId" : "3324328", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 22, 2020 1:49 PM", + "userId" : "3498075", + "content" : "Hi Manfred, There is internal comparator monitoring the voltage on Cboot, once it charged up to about 5V, the internal charging switch will be turn-off immediately. So the Cboot voltage rating 10V--16V is good enough. Cboot will not short to Vin voltage at any time, any voltage >7V on Cboot will damage CB pin B R Andy" + }, { + "contentId" : "3328274", + "userName" : "Manfred Weiskopf", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 4:43 AM", + "userId" : "159353", + "content" : "Hello Andy, thanks for the fast response. Kind regards Manfred" + } ], + "tags" : [ "/support/power-management/f/196/tags/WEBENCH_AE00_%2bDesign%2bTools", "/support/power-management/f/196/tags/LMR14206" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899070.json b/data/json/DLP/899070.json new file mode 100644 index 0000000000000000000000000000000000000000..6d39dfa57c92a40277c4e7383ac9456d7e99b9dd --- /dev/null +++ b/data/json/DLP/899070.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899070", + "reporterName" : "Albert Chuang", + "rankPoints" : "80", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "IPM Solution replace ON SEMI FNC42060F2 and Mitsubishi PSS20S92F6-AG", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 23", + "queryText" : "Hi Tier, Could you please recommend an IPM to replace ON SEMI FNC42060F2 and Mitsubishi PSS20S92F6-AG? No need to Pin to Pin, Only need the near spec and the sample function. Thank you.", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3324505", + "userName" : "Don Dapkus", + "rankPoints" : "174575", + "rankName" : "Guru", + "date" : "Apr 22, 2020 3:25 PM", + "userId" : "1027", + "content" : "Hi, Albert, This is not a spacecompany has devices for. We do sell gate drivers that could be coupled with discrete FETs from another vendor to provide an alternate solution. That would be about the closest we would have. If this answered your question, please press the Green button, otherwise, let us know if you have further questions on this topic." + } ], + "tags" : [ ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899071.json b/data/json/DLP/899071.json new file mode 100644 index 0000000000000000000000000000000000000000..bd13b3b83d41551c4ba835da080dc3f6d09db6c3 --- /dev/null +++ b/data/json/DLP/899071.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899071", + "reporterName" : "Sammi Shang", + "rankPoints" : "2880", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TL494: TL494 for invertor application", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 23", + "queryText" : "Part Number: TL494 Dear team, I wonder if TL494 could used for 100W, DCAC application. Customer need 12V vin, 110AC(sine wave) output. I see we have a reference design TIDA-01426 could applied for 1W application. Please help confirm if TL494 could be used or any other device could be recommended. Thanks. Best regards, Sammi", + "partNumber" : " TL494", + "allResponseList" : [ { + "contentId" : "3324337", + "userName" : "Colin Gillmor", + "rankPoints" : "22565", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 1:54 PM", + "userId" : "1139376", + "content" : "Hello Sammi I don't think the TL494 will work. It lacks the ability to produce a bipolar output easily. You can see that the TIDA-01426 design uses the TL494 to generate a high voltage DC and a linear amplifier to produce the sinusoid - it would not be practical to use this arrangement at 100W. I was able to find only a few DC/AC inverter designs in our reference designs library - please give me a few days to ask some colleagues for their opinions. Regards Colin" + }, { + "contentId" : "3324357", + "userName" : "Sammi Shang", + "rankPoints" : "2880", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 2:03 PM", + "userId" : "4661579", + "content" : "Hi Colin, Thanks for your response. Please kindly help check if TL494 or other device could support >30W application. Customer choose TL494 because they saw an article that describe TL494 are used in automobile charger or cigarette lighter that could support 30W. But as the article is chinese and not wrotten by Tiers, so I hope product line could help give some suggestion. Thanks. Best regards, Sammi" + }, { + "contentId" : "3326863", + "userName" : "Colin Gillmor", + "rankPoints" : "22565", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 9:38 AM", + "userId" : "1139376", + "content" : "Hi Sammi The TL494 can be used in the way that the customer schematic shows - one TL494 device producing a high voltage and the other TL494 producing an alternating square wave at 50Hz through a pair of totem pole MOSFET switches. We'll continue the conversation via email and I'll close this thread. Regards Colin" + } ], + "tags" : [ "/support/power-management/f/196/tags/TIDA_2D00_01426", "/support/power-management/f/196/tags/TL494" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899074.json b/data/json/DLP/899074.json new file mode 100644 index 0000000000000000000000000000000000000000..11f7840cfd7ef99869b3f196089345ff0dcb81ef --- /dev/null +++ b/data/json/DLP/899074.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "899074", + "reporterName" : "Allan Fan", + "rankPoints" : "2380", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS23751: Detect Active and Passive PSE", + "rankName" : "Intellectual", + "replies" : " 6", + "views" : " 40", + "queryText" : "Part Number: TPS23751 Hi Expert, Do we have any way to detect active or passive PSE or other companion part to do it? Thanks. Allan", + "partNumber" : " TPS23751", + "allResponseList" : [ { + "contentId" : "3324488", + "userName" : "Michael Pahl", + "rankPoints" : "4915", + "rankName" : "Expert", + "date" : "Apr 22, 2020 3:16 PM", + "userId" : "6102321", + "content" : "Hello Allan, My understanding of active vs passive PSE is this: active PSE's follow the IEEE 802.3 af, at or bt standards. Passive PSEs do not follow any standard, and does not negotiate power. Passive PoE is \"Always On\" You could use the T2P pin, since it will not activate if an .at or .bt handshake is not detected. But this assumes the PSE's will not be .at. If this post answers your question, please indicate so by marking this thread as resolved. Thank you. Regards, Michael P. Applications Engineer customer organization" + }, { + "contentId" : "3324634", + "userName" : "Allan Fan", + "rankPoints" : "2380", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 4:35 PM", + "userId" : "3540836", + "content" : "Hi Michael, \"assumes the PSE's will not be .at.\" I am a little bit confused. Do you mean \".af\", correct? Thanks, Allan" + }, { + "contentId" : "3324739", + "userName" : "Michael Pahl", + "rankPoints" : "4915", + "rankName" : "Expert", + "date" : "Apr 22, 2020 5:43 PM", + "userId" : "6102321", + "content" : "Yes, sorry I meant the PSE's can't be .af Thanks! If this post answers your question, please indicate so by marking this thread as resolved. Thank you. Regards, Michael P. Applications Engineer customer organization" + }, { + "contentId" : "3325212", + "userName" : "jerry zhang1", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 4:43 AM", + "userId" : "6330749", + "content" : "hi, michael we know T2P, and implemented. But the question is there any way to seperate .af and the passive(non-standard)? Because .3af won't provide sufficent power budget, and will lead to the system unstable. thanks Jerry" + }, { + "contentId" : "3326088", + "userName" : "Michael Pahl", + "rankPoints" : "4915", + "rankName" : "Expert", + "date" : "Apr 23, 2020 5:58 PM", + "userId" : "6102321", + "content" : "Hello Jerry, There is no way outright to do it on the TPS23751. If you were willing to switch devices to a device with PPD, then you could do it. Alternatively, if the Active PSEs were only on one pair set (ex. 1&2, and 3&6) and the Passive PSEs were on a different pairset (ex. 4&5, and 7&8). Then you could tell the difference, but you would have to force this configuration. If this post answers your question, please indicate so by marking this thread as resolved. Thank you. Regards, Michael P. Applications Engineer customer organization" + }, { + "contentId" : "3326499", + "userName" : "jerry zhang1", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 1:49 AM", + "userId" : "6330749", + "content" : "as i checked, the PPD is to detect the low voltage of power source but our application is 48V... Anyway , thanks for the answer." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS23751" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899075.json b/data/json/DLP/899075.json new file mode 100644 index 0000000000000000000000000000000000000000..ed3acc06ced6f3eda2125c8cae8abb6be7646b47 --- /dev/null +++ b/data/json/DLP/899075.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899075", + "reporterName" : "Takashi Yamaguchi", + "rankPoints" : "3960", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS54202: temperature range", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 23", + "queryText" : "Part Number: TPS54202 Hi team, I received a question about TPS54202 temp range. Could you support the question below? The d/s mentions that the operating junction temp range is 125C(max). On the other hand, the app note SPRA953C (/lit/an/spra953c/spra953c.pdf) mentions that Ta(ambient temp) is 85C(max) in the section \"6 Industrial and Commercial Temperature Ranges\". Should customer keep the Ta=85degC even if the Tj is less than 125degC? For instance, Tj is 120degC, but Ta is 90degC. Is that acceptable? Regards, Yamaguchi", + "partNumber" : " TPS54202", + "allResponseList" : [ { + "contentId" : "3324699", + "userName" : "Bruce Lu (MCP)", + "rankPoints" : "780", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 5:17 PM", + "userId" : "5032350", + "content" : "Hi Yamaguchi-san, The -40degC-85degC ambient temperature range is the standard requirement of industrial applications, which means that products for industrial applications must work normally at the condition of -40degC-85degC. For TPS54202, the operation junction temperature range is -40degC-125degC, which means that TPS54202 can work normaly at the condition of -40degC-125degC junction temperature. Obviously, 85degC Ta is the requirement for industrial, not for TPS54202. There is no risk for TPS54202 as long as the junction temperature is at the range of -40degC-125degC. So, No risk if the Ta is 90degC, while Tj is 120degC(which means when Ta is 85degC, Tj should be around 115degC. It is even safer at actual industrial applications)." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS54202" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899079.json b/data/json/DLP/899079.json new file mode 100644 index 0000000000000000000000000000000000000000..2f0a30dea830ed21475781f392bb640f3a89a711 --- /dev/null +++ b/data/json/DLP/899079.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899079", + "reporterName" : "Damith Pavithra", + "rankPoints" : "710", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC28710: About design calculator spreadsheet", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 12", + "queryText" : "Part Number: UCC28710 Hello Can someone give me the password to unprotect this design calculator sheet.. Thank you", + "partNumber" : " UCC28710", + "allResponseList" : [ { + "contentId" : "3324266", + "userName" : "Eric Faraci", + "rankPoints" : "7685", + "rankName" : "Expert", + "date" : "Apr 22, 2020 1:11 PM", + "userId" : "3729643", + "content" : "Damith We do NOT recommend that you change any of the equations in the excel design calculator. Many of the values from equations are used in subsequent calculations, so any change can cause errors. We recommend that you use the unlocked tool to just see what equations are used for various calculations. I've attached an unprotected version of this UCC28710 excel design calculator. Best Regards, Eric UCC28710-16 Excel Design Tool 9 29 15.xlsx" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC28710" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899080.json b/data/json/DLP/899080.json new file mode 100644 index 0000000000000000000000000000000000000000..2ca4e73b61b2afb8f85a64b5ac0a1c77174a245e --- /dev/null +++ b/data/json/DLP/899080.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899080", + "reporterName" : "tony gima", + "rankPoints" : "20", + "resolutionStatus" : "", + "ticketName" : "BQ24650: charge current 30A", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 20", + "queryText" : "Part Number: BQ24650 Hi, I am designing a solar charger for 1s 18650 lithium battery for a gateway sensor. The calculated current for the batteries to be charged within 3.1 hrs of sunlight, autonomy of 7 days is around 30A. The nominal voltage for the battery is 3.7V and I need 30 batteries in parallel for it to supply voltage to the sensor. Is bq24650 is capable of supplying the current and can be used to charge the batteries for this design? Tony", + "partNumber" : " BQ24650", + "allResponseList" : [ { + "contentId" : "3325118", + "userName" : "Kedar Manishankar", + "rankPoints" : "9290", + "rankName" : "Genius", + "date" : "Apr 23, 2020 2:15 AM", + "userId" : "4996925", + "content" : "Hi Tony, 30A charge current is very high for BQ24650. The reason we spec it for 10A even though it is a charge controller, is due to the limitations of the internal gate drive strength that is used to drive the switching FETs. For 30A the FET required should be larger to account for the increased current which results in a higher Qg of the FET. As these FET are driven at the 600kHz switching frequency, this would result in large gate drive losses which are not feasible. ACP-ACN and SRP-SRN max differential voltage is 100mV, normally 10mOhm for 10A max, 5mOhm can support 20A max etc. The issue with paralleling multiple BQ24650 to achieve 30A, is during termination, as the Constant Voltage loop of the different BQ24650 IC will try to regulate the same output. For 30A layout is extremely critical as well. One possible solution is to use an external gate driver to boost the internal gate drive strength and reduce gate driver losses, provided the input voltage is within recommended operating conditions of BQ24650. We do not have a reference design for such a system, and have not evaluated this solution so support is limited." + }, { + "contentId" : "3325209", + "userName" : "tony gima", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 4:39 AM", + "userId" : "6313311", + "content" : "Hi Kedar, Thank you for the feedback. I am planning to parallel bq24650 and reduce the current to 20A, based on what you said, I will still have an issue with constant voltage loop trying regulate the current. With your suggestion of adding an external gate driver? is there any similar designs that I can have a look at to give me some ideas on how to implement it in my design? I was thinking of just changing the Rsr resistor to get the 30A should be ok for what i'm doing. Thank you again, hope to hear from you soon. Regards, Tony" + } ], + "tags" : [ "/support/power-management/f/196/tags/bq24650" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899101.json b/data/json/DLP/899101.json new file mode 100644 index 0000000000000000000000000000000000000000..0ac9a9906d6b36d66d0c180b00a46f9121e348a6 --- /dev/null +++ b/data/json/DLP/899101.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899101", + "reporterName" : "Sean Wu1", + "rankPoints" : "10", + "resolutionStatus" : "", + "ticketName" : "WEBENCH® Tools/UCD3138064A: Design UCD3138 as AC-DC 1000W", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 7", + "queryText" : "Part Number: UCD3138064A Tool/software: WEBENCH® Design Tools Hi Gents, I only get info that UCD3138 can design as 2 phase interleave PFC or LLC DC-DC converter, but I want to select one UCD3138 design combine PFC circuit like AC to DC 12V/1000W.", + "partNumber" : " UCD3138064A", + "allResponseList" : [ { + "contentId" : "3324475", + "userName" : "Sean Xu", + "rankPoints" : "3120", + "rankName" : "Expert", + "date" : "Apr 22, 2020 3:10 PM", + "userId" : "689742", + "content" : "Hello, Sean, If you want to use one chip for two power stages, UCD3138 is doable. But there is a lot of isolation barriers such as voltage feedback and monitoring, and current measurement, and so on. A common solution is to use two small packages of UCD to control primary side and secondary side. Regards, Sean" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCD3138064A", "/support/power-management/f/196/tags/WEBENCH_AE00_%2bDesign%2bTools", "/support/power-management/f/196/tags/UCD3138" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899104.json b/data/json/DLP/899104.json new file mode 100644 index 0000000000000000000000000000000000000000..56a0b90ff0721401dd45515ed03076bb6b67d4a1 --- /dev/null +++ b/data/json/DLP/899104.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899104", + "reporterName" : "user5150089", + "rankPoints" : "75", + "resolutionStatus" : "", + "ticketName" : "MMWCAS-DSP-EVM: where can I find tiduen5.pdf and signal_processing_4chip_cascade.pdf", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 33", + "queryText" : "Part Number: MMWCAS-DSP-EVM Hi I read the mmwave_studio_cascade_user_guide.pdf in mmwave_studio docs. In section 8.3 link of tiduen5.pdf is invalid. I also can't find doc signal_processing_4chip_cascade.pdf in \"MatlabExamples\". Can you privde these two documents?", + "partNumber" : " MMWCAS-DSP-EVM", + "allResponseList" : [ { + "contentId" : "3324262", + "userName" : "Cesar", + "rankPoints" : "52960", + "rankName" : "Guru", + "date" : "Apr 22, 2020 1:09 PM", + "userId" : "20288", + "content" : "Hi, For the \"signal_processing_4chip_cascade.pdf\" document I need to check with cascade team and get back to you thank you Cesar" + }, { + "contentId" : "3325149", + "userName" : "user5150089", + "rankPoints" : "75", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 2:45 AM", + "userId" : "5150089", + "content" : "Thank you very much" + }, { + "contentId" : "3326612", + "userName" : "user5150089", + "rankPoints" : "75", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 4:25 AM", + "userId" : "5150089", + "content" : "Hi, thanks for your reply, can you provide signal_processing_4chip_cascade.pdf ?" + } ], + "tags" : [ "/support/sensors/f/1023/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2bcascaded%2bimaging%2bradar", "/support/sensors/f/1023/tags/MMWCAS_2D00_DSP_2D00_EVM", "/support/sensors/f/1023/tags/awr20_5F00_p2_5F00_swa20_5F00_cascade%2b%2b%2bradar" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899108.json b/data/json/DLP/899108.json new file mode 100644 index 0000000000000000000000000000000000000000..a9b1428f058cd9dd9ecc422074ca8557b98ce073 --- /dev/null +++ b/data/json/DLP/899108.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "899108", + "reporterName" : "Tommy Tzeng", + "rankPoints" : "1320", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS53219A: switch phase node issue", + "rankName" : "Expert", + "replies" : " 4", + "views" : " 34", + "queryText" : "Part Number: TPS53219A Hi Team, currently testing 0A~12A,phase node waveform is ok, but at 13A~17A began to appear double plus(switch phase node) and jitter state, may i know what kind the possible cause? please kindly refer the attachment the schematic and waveform test.SCHEMATIC1 _ 077_+V5A_+V5S.pdf RX621C_+V5A.docx", + "partNumber" : " TPS53219A", + "allResponseList" : [ { + "contentId" : "3325614", + "userName" : "David_Daniels", + "rankPoints" : "2325", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 1:00 PM", + "userId" : "14529", + "content" : "We are reviewing and will get back shortly." + }, { + "contentId" : "3325968", + "userName" : "Peter James Miller", + "rankPoints" : "19805", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 4:28 PM", + "userId" : "8518", + "content" : "Tommy Tzeng The TPS53219A uses TI's D-CAP mode control, which is derived from Constant On-Time (COT) control. COT control relies on the sensed output voltage (FB pin for the TPS53219A) rising during the On-time and falling during the Off-time. Since output capacitors with very low ESR create a phase-shift between the On/Off time of the switching node and the rise and fall of the output voltage, they can require additional sensed output voltage ripple to stabilize the switching frequency and avoid the 2 switching frequency operation that you see in your waveforms. The switching frequency appears to be 750kHz. At 750kHz, the 6.04k + 100nF ripple injection circuit adds 6.4mV of ripple at feedback. Due to the 100pF C1351, this injected ripple represents only 1.6mOhms of ESR at the sensed output. While that should be sufficient to stabilize a loop with 2x 560uF + 2x 10uF output capacitors, the low ripple injection amplitude will make it sensitive to noise. I would recommend: Decrease C1341 from 100nF to 47nF or 33nF to increase the injected ripple voltage and provide a more stable switching frequency. Since D-CAP mode control is a ripple valley regulation control, this increased ripple will increase the average feedback voltage, and thus output voltage in regulation. With a 600mV reference voltage, changing C1341 to 47nF should increase the output voltage approximately 1% and decreasing C1341 to 33nF should increase the output voltage approximately 2% To compensate for this change, you can update the value for R914 replacing the 0.6V reference voltage with 0.606 for a 47nF capacitor or 0.609 for a 33nF capacitor." + }, { + "contentId" : "3328457", + "userName" : "Tommy Tzeng", + "rankPoints" : "1320", + "rankName" : "Expert", + "date" : "Apr 27, 2020 7:56 AM", + "userId" : "5169797", + "content" : "Hi Peter James miller, got it,thanks for your great support, but i have a question. but the output has use POSCAP also need to be application like DCR compensation? because R1519&C1340&C1340 has no componebt on the board, is option." + }, { + "contentId" : "3328777", + "userName" : "Peter James Miller", + "rankPoints" : "19805", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 1:26 PM", + "userId" : "8518", + "content" : "Tommy Tzeng It really depends on the phase-angle of the output voltage ripple, and the amplitude.company recommends a minimum of 10mV of ripple at the feedback node to minimize the jitter and maintain a stable switching frequency. It's likely that under heavy load there just isn't enough ESR ripple on POSCaps that you have to overcome the switching noise, so it's triggering an On-time to increase the ramp amplitude. If the existing circuit is using POSCaps and is only going into this mode at 13A, try sizing the R-C for about 5mV pk to pk injection to add to the ESR ripple. Reduce the C to the output node of the inductor to 22nF and size R: Cc1 = (Vin-Vout) * (Vout/Vin) * 1/Fsw * 1 / (5mV x 22nF) That should get you 5mV of pk to pk ripple from the injected RC. That will add to the ESR ripple at FB and help stabilize your switching frequency without slowing down the transient response." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS53219A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899114.json b/data/json/DLP/899114.json new file mode 100644 index 0000000000000000000000000000000000000000..1e1b7a95fe30c54d15c8543a6af8eb54bac64604 --- /dev/null +++ b/data/json/DLP/899114.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899114", + "reporterName" : "Pradeep Kumar68", + "rankPoints" : "410", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS7A4701-EP: Sink current", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 8", + "queryText" : "Part Number: TPS7A4701-EP HI TI, I am using TPS7A4701RGWR for RF application, where I generate 28V from 28.5V. This RF circuit has few Pin diode Switches. Since I have PIN DIODE this LDO might have to sink -100mA current, So what is the sink current capability of TPS7A4701RGWR??", + "partNumber" : " TPS7A4701-EP", + "allResponseList" : [ { + "contentId" : "3324381", + "userName" : "JCHK", + "rankPoints" : "27915", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 2:16 PM", + "userId" : "1108707", + "content" : "Hi Pradeep, Most positive LDO's only have the ability to source current. They do not normally have the ability to sink current. If VOUT happens to be higher than the intended regulation voltage, the LDO simply stops sourcing current to the load. I hope this answers your question." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS7A4701_2D00_EP" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899116.json b/data/json/DLP/899116.json new file mode 100644 index 0000000000000000000000000000000000000000..7d61d1e10ea729be2abf71003d68285f6d364a69 --- /dev/null +++ b/data/json/DLP/899116.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899116", + "reporterName" : "Aki Li", + "rankPoints" : "4080", + "resolutionStatus" : "Resolved", + "ticketName" : "UCC39002: can it support 50V DCDC module?", + "rankName" : "Expert", + "replies" : " 2", + "views" : " 14", + "queryText" : "Part Number: UCC39002 Customer is looking for a load sharing solution in their DCDC brick module with 50V output. Could you please help check whether UCC39002 can support it? If not, is any other solution for them? Thank you.", + "partNumber" : " UCC39002", + "allResponseList" : [ { + "contentId" : "3324007", + "userName" : "John Griffin1", + "rankPoints" : "32175", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 9:02 AM", + "userId" : "1693693", + "content" : "Hello Aki Li. The answer is yes . The UCC39002 can operate with 50V output power modules. This is described in the data sheet aand also in the attached document. 8475.UCC29002_REF.pdf Regards John" + }, { + "contentId" : "3324021", + "userName" : "Aki Li", + "rankPoints" : "4080", + "rankName" : "Expert", + "date" : "Apr 22, 2020 9:20 AM", + "userId" : "5303453", + "content" : "John, Thank you for the prompt support." + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC39002" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899127.json b/data/json/DLP/899127.json new file mode 100644 index 0000000000000000000000000000000000000000..63cf079f08dce37a30b5356816bcb17a9276c708 --- /dev/null +++ b/data/json/DLP/899127.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899127", + "reporterName" : "user6251517", + "rankPoints" : "10", + "resolutionStatus" : "", + "ticketName" : "TPS650864: TPS6508640 BUCK2_POWER GOOD", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 16", + "queryText" : "Part Number: TPS650864 I have one question about TPS6508640: We know, TPS6508640 has been programed by a default configuration before delivery to the customer. the power up sequence is about: LDO5 & LDO3P3-------> BUCK2 output +0V85 when CTL3 is high level--------------> other bucks output when CTL4 is high level. in my design, CL4 is connected to GPO1_BUCK2_PG, Now, LDO5 & LDO3P3 have no problem, output normally, and CTL3 is always high level, but , the power good output of BUCK2 has some questions, GPO1_BUCK2_PG will turn to low level and will keep 912uS low level after a 17ms high level. if we cut off the load and we got the same result. so, we think, there is some problem with TPS6508640. it is hard for us to know why 0.85V will be powered down for about 912us and then will power up for about 17ms, then power down again for 912uS, and then power up and keep about 17ms...... Could you please help us about this question?", + "partNumber" : " TPS650864", + "allResponseList" : [ { + "contentId" : "3324512", + "userName" : "Kevin LaRosa", + "rankPoints" : "13725", + "rankName" : "Genius", + "date" : "Apr 22, 2020 3:27 PM", + "userId" : "3460140", + "content" : "Hello, You appear to be describing emergency shutdown followed by restart. The TPS650864 / TPS650861 family will initiate an emergency shutdown if any of the enabled voltage rails does not reach the target voltage within 10 ms. I would recommend going through the power up sequence described in Figure 6-4. TPS6508640 Power-Up Sequence in the datasheet and identifying if there is a power rails which is not reaching the target voltage as expected. An example of this behavior is in this E2E post where they figured out that they did not connect V5ANA so BUCK4 (the first of them to power on) was not stable: /support/power-management/f/196/t/893163 Your case is likely to be a different power regulator. There are many possibilities. If you have not populated any of the external components for an \"unused\" power rail that is still being enabled by the sequencer, that would be a likely candidate. We have seen many cases where someone is not using one of the BUCKs and does not populate the inductor / capacitor. In that case the PMIC will see this as a power fault and do an emergency shutdown. If you are not able to identify the problem regulator, please post the screenshots of the power up sequence and we can analyze to see if there is anything you missed." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS650864" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899136.json b/data/json/DLP/899136.json new file mode 100644 index 0000000000000000000000000000000000000000..769a5df4adcba0b0e3fd49f990a8385b00104887 --- /dev/null +++ b/data/json/DLP/899136.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899136", + "reporterName" : "user5244356", + "rankPoints" : "40", + "resolutionStatus" : "", + "ticketName" : "IWR1642: I can't download flash in IWR1642.", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 24", + "queryText" : "Part Number: IWR1642 I have some Radar Modules that are made of IWR1642. Some of them can't be downloaded firmware. Full part number is IWR1642AQAGABL. I tried to measure with oscilloscope. Upon downloading with Uniflash, it was confirmed that the RS232_RX Pin was low and fixed. Other boards are downloaded normally. Why is this problem happening?", + "partNumber" : " IWR1642", + "allResponseList" : [ { + "contentId" : "3324818", + "userName" : "Charles Oladimeji", + "rankPoints" : "26350", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 7:14 PM", + "userId" : "4461477", + "content" : "Hi, Can you please provide some more information about the issue? There is no way to say why its happening with the available information using an oscilloscope can you confirm that the SOP lines are settling at 3V3 before nreset crosses 1v5? What is the difference between the working and failing board? BR, Charles O" + }, { + "contentId" : "3328172", + "userName" : "user5244356", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 26, 2020 11:51 PM", + "userId" : "5244356", + "content" : "Level of SOP2 & NRESET are 3V3. There is no difference between working board and failing board The two boards are circuitly same board. I only saw this on boards with IWR1642. I haven't seen it in XWR1243, XWR1443, XWR6843 and AWR1642. Of course I used the IWR1642 the most, but I haven't seen any other chips firmware download yet." + } ], + "tags" : [ "/support/sensors/f/1023/tags/UniFlash", "/support/sensors/f/1023/tags/IWR1642" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899139.json b/data/json/DLP/899139.json new file mode 100644 index 0000000000000000000000000000000000000000..c3ae35f301a6c6cb8ec5a5524419a3149ead3d60 --- /dev/null +++ b/data/json/DLP/899139.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899139", + "reporterName" : "Electrobud", + "rankPoints" : "2125", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS62135: Heat Isssues faced for TPS62135", + "rankName" : "Expert", + "replies" : " 3", + "views" : " 16", + "queryText" : "Part Number: TPS62135 Hi, Kindly please help to advise as I am currently facing high heat issues during switching on the TPS62135, the temperature rises continuously until it cuts off and it's around 120degC. Below are the operating requirements. Vin: 13.5V Vout: (application is USB type C charger) 12V 1.5A, 9V 2.0A, 5V 3.0A Please help to advise on the design improvement which is needed to bring down the heat.", + "partNumber" : " TPS62135", + "allResponseList" : [ { + "contentId" : "3324274", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Apr 22, 2020 1:15 PM", + "userId" : "24596", + "content" : "Electrobud, You state Vout is 5, 9 or 12 V. However your resistor FB divider yields 5.13 V as the output. I do not see an output capacitor on your schematic. Can you provide it? There is a duplicate post with the TPS56339 in the title, but the schematic is for TPS62135. Should I delete that post?" + }, { + "contentId" : "3324316", + "userName" : "Electrobud", + "rankPoints" : "2125", + "rankName" : "Expert", + "date" : "Apr 22, 2020 1:45 PM", + "userId" : "4668160", + "content" : "John, Yes you may close the duplicate thread. Can you provide me your email so that I can share you full schematic." + }, { + "contentId" : "3324330", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Apr 22, 2020 1:51 PM", + "userId" : "24596", + "content" : "Electrobud, j(dash)tucker(at)ti(dot)com Since we are taking this off line, I will close this thread." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS62135" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899146.json b/data/json/DLP/899146.json new file mode 100644 index 0000000000000000000000000000000000000000..d53379e989448613ee1e3ef1eaffe577a65b0aed --- /dev/null +++ b/data/json/DLP/899146.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899146", + "reporterName" : "Hero Chen", + "rankPoints" : "20", + "resolutionStatus" : "", + "ticketName" : "BQ24133: Use 19V to be Input Voltage Issue", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 13", + "queryText" : "Part Number: BQ24133 Dear expert, I have the question about input voltage written in datasheet(4.5V to 17V). My battery is 3-Cell 12.6V. Now, I am using 15V 2A adpator. If I use 19V 2A adaptor with input, are there any damage on this charger IC? Or, it just has bad performance such as efficiency... Please kindly share some suggestions. Thanks.", + "partNumber" : " BQ24133", + "allResponseList" : [ { + "contentId" : "3324630", + "userName" : "Michael Emanuel35", + "rankPoints" : "2055", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 4:32 PM", + "userId" : "4996893", + "content" : "Hero, In the datasheet, it says that the AVCC input voltage operating range during charging is 4.5 V to 17 V. The entire electrical characteristics depends on this range. I would not recommend using a 19 V adapter. Thanks, Mike Emanuel Please click \"This resolved my issue\" button if this post answers your question." + } ], + "tags" : [ "/support/power-management/f/196/tags/bq24133" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899154.json b/data/json/DLP/899154.json new file mode 100644 index 0000000000000000000000000000000000000000..69ec6bb16800c718102ac5e90287e268b9fe1c16 --- /dev/null +++ b/data/json/DLP/899154.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899154", + "reporterName" : "CHOI SEUNG WON", + "rankPoints" : "640", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC2808-2: Wrong information in UCC2808 PDF?", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 10", + "queryText" : "Part Number: UCC2808-2 Dearcompany I think ucc2808a pdf has a wrong information in table 1. Second line , UCCx808A-1 --> UCCx808A-2?? Best regards Choi", + "partNumber" : " UCC2808-2", + "allResponseList" : [ { + "contentId" : "3324181", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 12:12 PM", + "userId" : "1139254", + "content" : "Hi Choi, Thanks for bringing this to our attention. The last line in the table should be UCC2808A-2. We will add this to the documentation queue to update the datasheet. Regards Peter" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC2808_2D00_2" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899155.json b/data/json/DLP/899155.json new file mode 100644 index 0000000000000000000000000000000000000000..ad26110a76477348d679a16a0de2acee1fb25b52 --- /dev/null +++ b/data/json/DLP/899155.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899155", + "reporterName" : "Christopher Richardson", + "rankPoints" : "320", + "resolutionStatus" : "", + "ticketName" : "LM5115: Sub-harmonic oscillation at high VIN and with higher output currents", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 25", + "queryText" : "Part Number: LM5115 Dear E2E, I'm testing an LM5115 operating as an SSPR where the main converter is an active clamp forward. The VIN to the forward is 38V to 140V, and the forward xfmr has a 2:1 ratio. The output voltage of the forward converter is 12V. The output voltage of the SSPR is 5.2V, and the maximum output current is 8.0A. I have taken great care to make sure that none of the abs max limits of the LM5115's pins are violated. At no-load, the SSPR works properly over the complete VIN range. Once I increase the load to about 2.5A, though, the SSPR's duty cycle shows a sub-harmonic oscillation that begins as VIN increases past around 125V, and then doesn't stop until VIN has been decreased back down below about 100V. At the maximum load of 8A, the sub-harmonic oscillation begins as VIN increases past around 100V and doesn't go back to regular pulse widths until VIN has dropped below around 80V. In the following plots, SW1 is the \"phase\" signal as it's referred to in the LM5115 datasheet, and SW3 is the switch node of the SSPR itself. So far, I've confirmed to my satisfaction that the outer voltage control loop is not at fault, as about one year ago David Baba sent me a MathCAD model, and with this I was able to set the control loop compensation, and the load step response looks fine: I have also tried added filtering on the current sense inputs, as well as reducing the current sense resistance to 1/2 of its normal value, and none of these things change the sub-harmonic oscillation. Therefore, I have discounted the current limit as a possible culprit. I'm not sure how to test to see if the negative current limit could be at fault. Is it possible that 600 ns is around the minimum stable on-time? I'm not allowed to post the actual schematic in a public forum, however using this one from the datasheet: My values are: fsw = 136 kHz, VBIAS from regulated 10V source, C4 = 470 pF, current sense = 3 mohm, R4 = 499k, added 220 pF from CO to GND, C7 = 22 nF, R3 = 33k, L1 = 8.2 uH, total Cout = 940 uF and total ESR around 8 mohm Any other possible causes of this sub-harmonic oscillation? Thanks, Chris", + "partNumber" : " LM5115", + "allResponseList" : [ { + "contentId" : "3324341", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 22, 2020 1:56 PM", + "userId" : "3498075", + "content" : "Hi Chris, Can you upload the image again? B R Andy" + }, { + "contentId" : "3325508", + "userName" : "Christopher Richardson", + "rankPoints" : "320", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 10:55 AM", + "userId" : "3679624", + "content" : "PID sub-harmonic oscillation 2020-04-21.pdf Hi Andy, All the images were in a PDF, so I've attached that, and I hope it comes through properly. While I'm writing, let me clarify that the schematic I'm using for your reference is Figure 21 on p.16 of the LM5115 datasheet. I forgot to note the output resistor divider values and they're critical for the control loop compensation. Those are: R12 = 18kohm, R13 = 3kohm Thanks, chris" + }, { + "contentId" : "3330017", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 28, 2020 7:16 AM", + "userId" : "3498075", + "content" : "Hi Chris, Unstable switching should be caused by noise or unstable control loop. I roughly check your external components and have below suggestions: 1. C4 390pF 2. C7 47nF ? do you have estimation of your primary converter loop cross over freq? 3. What's saturation current of L1? it shoul be >15A if Rsense=3mohm. 4. what's output capacitor combination? ceramic cap voltage rating>=16V 5. can you upload PCB layout? screen short image is OK. B R Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM5115", "/support/power-management/f/196/tags/Sub_2D00_harmonic" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899156.json b/data/json/DLP/899156.json new file mode 100644 index 0000000000000000000000000000000000000000..05315c612b78f2cfab08ed7dfdccfd30dd5be050 --- /dev/null +++ b/data/json/DLP/899156.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899156", + "reporterName" : "Faisal Kabir", + "rankPoints" : "10", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ40Z50-R1: Guidance on how to fix values of over voltage, under voltage etc threshold.", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 11", + "queryText" : "Part Number: BQ40Z50-R1 Hi! i am a student currently working on 4S4P battery pack. i want some guidance on how to fix overvoltage, undervoltage etc values. are these fixed via hardware or software and how? also, i would be grateful if some basic level literature on use of BQ40z50 (apart from datasheet) is shared.", + "partNumber" : " BQ40Z50-R1", + "allResponseList" : [ { + "contentId" : "3324915", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 9:18 PM", + "userId" : "1864278", + "content" : "Hi Faisal, I would suggest you take a look at the Technical Reference and you will see many details there. Are you using bq40z50-R1? I would suggest you use bq40z50-r3 since it has the latest firmware. Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/bq40z50", "/support/power-management/f/196/tags/bq40z50_2D00_r1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899171.json b/data/json/DLP/899171.json new file mode 100644 index 0000000000000000000000000000000000000000..b6ed96d55da04c35b6bdb972e0acf81115696c08 --- /dev/null +++ b/data/json/DLP/899171.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "899171", + "reporterName" : "yi xiao", + "rankPoints" : "3675", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS7A47: adjustable Vout=Vin-0.3V LDO power design with TPS7A4701", + "rankName" : "Genius", + "replies" : " 5", + "views" : " 23", + "queryText" : "Part Number: TPS7A47 Hi there, We met some trouble when design a special LDO power as follow. This specific LDO circuit is placed right after power-in port (battery or adaptor) and is aimed to suppress 800KHZ switching noise generated from other DC/DC modules in system. (1)Vin = 14.4V(battery) or 19V(adaptor), (2)Vout is required to approximately follow Vin: Vout = Vin - V_drop, V_drop should be small to reduce power loss, and is expected to limite within (0.2~0.4V), the exact number is not important, but we sat its typical. = 0.3V. (3)I_load max = 1A or so. (4) PSRR > 40dB at 800KHZ We built an LDO prototype with discrete components (mosfet and amplifier) , but the PSRR is not as good as expected. And we think better to use off-the-shell LDO IC to do this. Hopecompany experts could help on this. Thanks very much!", + "partNumber" : " TPS7A47", + "allResponseList" : [ { + "contentId" : "3324366", + "userName" : "JCHK", + "rankPoints" : "27915", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 2:07 PM", + "userId" : "1108707", + "content" : "Hi Yi, The TPS7A47 has really good PSRR across a wide bandwidth, However, for minimizing V_drop, any LDO's PSRR performance degrades. See the below plot from the TPS7A47: When an LDO gets into dropout, it is working like a load switch. In this mode of operation, the only filtering it can provide is a function of the effective resistance of the LDO and COUT. So maintaining a V_drop of ~800mV would help to get the filtering you are looking for. Note: Thermally at 1A with a 500mV drop, there is 500mW of power dissipation. The thermal performance of the TPS7A47 is quite good so with a TJA of 32.5C/W. The temp rise of the die would only be 0.5*32.5 or ~16.3C rise above the PCB ambient. I hope this answers your question." + }, { + "contentId" : "3325038", + "userName" : "yi xiao", + "rankPoints" : "3675", + "rankName" : "Genius", + "date" : "Apr 23, 2020 12:49 AM", + "userId" : "1453327", + "content" : "Thanks, John, you infomation on PSRR vs V_drop is helpful. Do you have any suggestion on how to implement setting Vout = Vin - 0.5V (or 0.8V) ? Becasue Vin can battery=14.4V or adaptor=19V, connecting the FB pin seems a little tricky. Thanks." + }, { + "contentId" : "3325920", + "userName" : "JCHK", + "rankPoints" : "27915", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 4:05 PM", + "userId" : "1108707", + "content" : "Hi Yi, Something like a tracking LDO seems like what you are looking for. The TPS7B4254 regulates to the applied reference. Here is a quick schematic and simulation: I will have to check with design to see if the NR pin of the TPS7A47 can be over-ridden to turn it into a tracking LDO." + }, { + "contentId" : "3326596", + "userName" : "yi xiao", + "rankPoints" : "3675", + "rankName" : "Genius", + "date" : "Apr 24, 2020 3:58 AM", + "userId" : "1453327", + "content" : "Hi John , thanks for introducing trakcing LDO. I will wait for you info about whether NR pin of the TPS7A47 can be over-ridden to turn it into a tracking LDO." + }, { + "contentId" : "3327538", + "userName" : "JCHK", + "rankPoints" : "27915", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 8:55 PM", + "userId" : "1108707", + "content" : "Hi Yi, I confirmed with our design team that the device will operate if you drive the reference externally as described above. We have not tested this configuration so not sure at all as to how well it will perform. Do you have an EVM that you can try? Regards," + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS7a47" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899188.json b/data/json/DLP/899188.json new file mode 100644 index 0000000000000000000000000000000000000000..1372b0dffb89b5fe32951c029dfabef1c9a50945 --- /dev/null +++ b/data/json/DLP/899188.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899188", + "reporterName" : "Arvind Singh1", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LP8863EVM: LP8863EVM | Linux Kernel support | How to configure/communicate using I2C.", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: LP8863EVM Hicompany Team, I am doing an Internal POC where in i am considering to use LP8863EVM for controller the brightness of the Display. I can see there is a software \"setup_LP8863_EVM_1.0.0\" which can be used to configure it. But my requirement is to control the display brightness while the display is powered on and running . My host is running with linux kernel 4.14. Can you please suggest how can i achieve it. Any suggestions will be greatly appreciated. Thanks, Arvind Singh", + "partNumber" : " LP8863EVM", + "allResponseList" : [ { + "contentId" : "3324093", + "userName" : "Charles-Chen", + "rankPoints" : "5435", + "rankName" : "Expert", + "date" : "Apr 22, 2020 10:42 AM", + "userId" : "6102657", + "content" : "Hi Arvind, You have post another thread similar to this and I will reply to you in another thread." + } ], + "tags" : [ "/support/power-management/f/196/tags/LP8863EVM" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899191.json b/data/json/DLP/899191.json new file mode 100644 index 0000000000000000000000000000000000000000..b5c2bb0a0d8d756eee5de5fabe79928b3c4e5c26 --- /dev/null +++ b/data/json/DLP/899191.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899191", + "reporterName" : "Shenhua Zhang", + "rankPoints" : "520", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS24740: VIMON & VIMONBUF", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: TPS24740 Hi Expert, Does it mean VIMONBUF=3*VIMON? (DC value, not AC value)", + "partNumber" : " TPS24740", + "allResponseList" : [ { + "contentId" : "3324174", + "userName" : "Praveen GD", + "rankPoints" : "9575", + "rankName" : "Genius", + "date" : "Apr 22, 2020 12:08 PM", + "userId" : "4421098", + "content" : "Hi Shenhua, Yes, it simply means that the voltage on IMONBUF=3 x IMON The IMONBUF takes the IMON signal and buffers it 3x. This introduces more error, but the output is low impedance, has a larger full scale range, and can drive up to 100pF of capacitance." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS24740" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899192.json b/data/json/DLP/899192.json new file mode 100644 index 0000000000000000000000000000000000000000..00b8aa126a588d1c9d2d76ef06c059e170d20496 --- /dev/null +++ b/data/json/DLP/899192.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899192", + "reporterName" : "Tak", + "rankPoints" : "150", + "resolutionStatus" : "Resolved", + "ticketName" : "UCC28780: Output Filter Calculation", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 23", + "queryText" : "Part Number: UCC28780 I am now reading the UCC28780 data sheet. I have a question about LC filter design. You are using ceramic capacitors 33uF / 25V in parallel. It also states that the ESR should be very low. However, the actual capacitance value is several uF. ‥ Since I design Vout at 32V, I need a ceramic capacitor of 35V or more. If the requirements are only a few uF and low ESR, how about using the MU series (35V, 4.7uF) of POLYMER MULTI-LAYER CAPACITORS (RUBICON) as an alternative to ceramic capacitors? (MU35 / 4.7 ≈ Ceracon 33uF × 2) Of course, it is not as low ESR as Ceracon, but it is also stated in the manufacturer's HP that it is quite small. We believe that alternatives will contribute to downsizing. Ceramic capacitors also care about destruction due to mechanical (shock) cracks. Please give us your opinion. B.R. Tak", + "partNumber" : " UCC28780", + "allResponseList" : [ { + "contentId" : "3325533", + "userName" : "Ulrich Goerke", + "rankPoints" : "11470", + "rankName" : "Genius", + "date" : "Apr 23, 2020 11:39 AM", + "userId" : "637353", + "content" : "Hello Tak-san, Thank you for your interest in the UCC28780 ACF controller. In my opinion, I see no reason to not consider any type of capacitor for use in this application as long as it can reliably withstand the operating conditions for the expected life of the product. In other words, you can certainly evaluate the MU series as a resonance capacitor, provided that the component ratings are not violated. In the MU datasheet there are graphs of \"Permissible Current for Frequency\" which peak near 2.2Arms at 200kHz for 10uF, 35-V rating. In the notes for \"Caution for Use\" file, Rubycon warns about non-sinusoidal currents and internal self-heating limits (as well as limits on hand-soldering, etc). They recommend to contact the factory for non-sinusoidal ratings. Provided that these limits are not violated, I think these capacitors can work in this application. But consider that for most power levels where ACF is appropriate (25W+) the resonance current rms value may be several times the average output current, so I expect that more than one capacitor may need to be paralleled to meet the Arms/Hz and temperature rise limits. These parts may be more applicable to higher voltage, lower current designs, but can be evaluated (at least on paper) for any design. Thank you for bringing this option to our attention. Regards, Ulrich" + }, { + "contentId" : "3326609", + "userName" : "Tak", + "rankPoints" : "150", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 4:23 AM", + "userId" : "4369382", + "content" : "Thank you for useful tips . I will evaluate carefully." + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC28780" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899194.json b/data/json/DLP/899194.json new file mode 100644 index 0000000000000000000000000000000000000000..7e97e69b86b1f24e8b4a577b61cc8052647a10af --- /dev/null +++ b/data/json/DLP/899194.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899194", + "reporterName" : "Jeff Chen71", + "rankPoints" : "1345", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS53622: Can I short all TSEN pin together ?", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 9", + "queryText" : "Part Number: TPS53622 Hi, In customer's board there are two TPS53622 and one TPS53679 on board. As below picture,do you suggest connect all TSEN pin together? Jeff Chen", + "partNumber" : " TPS53622", + "allResponseList" : [ { + "contentId" : "3324250", + "userName" : "Chasel Chen", + "rankPoints" : "4335", + "rankName" : "Expert", + "date" : "Apr 22, 2020 1:02 PM", + "userId" : "3828515", + "content" : "Hi Jeff, No, please connect TSEN to corresponding controller. Thanks" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS53622", "/support/power-management/f/196/tags/TPS53679" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899199.json b/data/json/DLP/899199.json new file mode 100644 index 0000000000000000000000000000000000000000..02f4167958856b3670f45e8a9a7e87326450ff60 --- /dev/null +++ b/data/json/DLP/899199.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899199", + "reporterName" : "user4819317", + "rankPoints" : "160", + "resolutionStatus" : "", + "ticketName" : "BQ25150: Current ADC data", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 17", + "queryText" : "Part Number: BQ25150 Greetings， Reading the BQ25150 Datasheet, the current ADC only support charging current, not support discharging current detect? and the datasheet says BQ2510 has integrated low IQ gauge, how can customer read battery capacity information? Thanks,", + "partNumber" : " BQ25150", + "allResponseList" : [ { + "contentId" : "3324904", + "userName" : "Nick Brylski", + "rankPoints" : "340", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 9:01 PM", + "userId" : "5338371", + "content" : "Hello, BQ25150 does not support direct measurement of discharging current. However, with use of ADCIN & BAT pin, a sense resistor can be used to measure charging and discharging current. Voltage divider to ADCIN would need to be used because max voltage on pin is 1.2V. Battery capacity can be estimated using a voltage based gauging scheme with look up table. Battery first needs to be characterized by an accurate gauge. We are currently investigating this and hope to have more details released in future. Best," + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25150" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899202.json b/data/json/DLP/899202.json new file mode 100644 index 0000000000000000000000000000000000000000..cd9836a7bdfd178d7925e0529809136a8930b11a --- /dev/null +++ b/data/json/DLP/899202.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899202", + "reporterName" : "Arvind Singh1", + "rankPoints" : "20", + "resolutionStatus" : "", + "ticketName" : "LP8863EVM: LP8863EVM | Hw Compatibility | How to configure/communicate using I2C.", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 17", + "queryText" : "Part Number: LP8863EVM Hicompany Experts, I am planning to use 2 ofcompany EVM's for my internal POC Project. 1. DS90UH928QEVM 2. LP8863EVM Below is the block diagram of by Hardware set-up. 1. Here Harman Cockpit h/w will be running with Android 9, and Display Panel is of Innolux , So in order to interface it and control its Display backlight i came across LP8863EVM. My query is 1. will this EVM can be used for my Project. 2. Is it possible that we can control display brightness using \"Harman Cockpit H/w\" by connecting in between LP8863EVM. Any suggestions will be greatly appreciated. Best Regards, Arvind Singh", + "partNumber" : " LP8863EVM", + "allResponseList" : [ { + "contentId" : "3324122", + "userName" : "Charles-Chen", + "rankPoints" : "5435", + "rankName" : "Expert", + "date" : "Apr 22, 2020 11:19 AM", + "userId" : "6102657", + "content" : "Hi Arvind, I am not familiar with linux kernel and \"Harman Cockpit H/w\". Let me check whether I understand your question correctly or not. Do you want to control the brightness of LP8863-Q1 according to the commands produced by Innolux Display? I have checked with my team that we don't have software driver or SDK for Linux kernel and the only source is the GUI that you can download from the website. I have the following advice for you temporarily. USB2ANY+LP8863-Q1, while USB2ANY is an interface adaptor that is intended to allow a device to control EVM via a USB connection. And what you need to do is to write code for USB2ANY in your Linux kernal. You could find detailed information about USB2ANY in this link. And the Q3 in this FAQ may also be helpful to you. You can also use adaptor similar with USB2ANY that you are more familiar with in your system to achieve this. Try to use your system to generate a PWM signal and the duty cycle of PWM is produced according to the commands from Linux kernel. The PWM pin of LP8863-Q1 can be used to control the brightness of LED. Using DSP,MCU, FPGA,CPLD or processor to communicate with LP8863-Q1 through SPI or I2C directly and change information with your system. Hope this helps." + } ], + "tags" : [ "/support/power-management/f/196/tags/LP8863EVM", "/support/power-management/f/196/tags/DS90UH928QEVM" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899204.json b/data/json/DLP/899204.json new file mode 100644 index 0000000000000000000000000000000000000000..6a6bb253498d7de7b67536418fce130f71b54245 --- /dev/null +++ b/data/json/DLP/899204.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899204", + "reporterName" : "cyan zhou", + "rankPoints" : "900", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS2546: About Current-Limit Settings", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 10", + "queryText" : "Part Number: TPS2546 Hicompany Expert, we are now using BC1.2 TPS2546, and have a question here. About Current-Limit Settings, ILIM_HI setting is easy to understand. Could you help to give an easy-to-understand explanation, what is meaning of ILIM_LO setting? What does this value do? What are the conditions for setting value. Thanks and wait for your reply. Cyan", + "partNumber" : " TPS2546", + "allResponseList" : [ { + "contentId" : "3324230", + "userName" : "Adam Mc Gaffin", + "rankPoints" : "13080", + "rankName" : "Genius", + "date" : "Apr 22, 2020 12:51 PM", + "userId" : "4996939", + "content" : "Hello, There is a pin called ILIM_SEL which gives the user the ability to determine which current limit resistor (ILIM_HI or ILIM_LO) is referenced. If you look at Table 3 in the datasheet, it shows that the CTL pins change the charging mode that the TPS2546 is advertising, and the ILIM_SEL pin allows control of what the current limit is set to" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS2546" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899211.json b/data/json/DLP/899211.json new file mode 100644 index 0000000000000000000000000000000000000000..ca6dd4c8c60c67ce61dfa4a4be058f54d485fc93 --- /dev/null +++ b/data/json/DLP/899211.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899211", + "reporterName" : "sangeetha s1", + "rankPoints" : "110", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS7A85: VBIAS supply threshold", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 12", + "queryText" : "Part Number: TPS7A85 Hi Team, We are using the TPS7A8500 LDO in our application.Find the following requirements, 1. Vin : 2.2V & Vout: 1.9V , Iout : 2.6A 2.Vin : 1.4V & Vout: 1.1V,Iout : 3.7A We dont have 5V supply in our board,Shall we give 3.3V for Vbias supply,If we provide 3.3V how much noise/ripple characterstics and AC/DC performance will be affteced for the output? Kindly confirm the same for design clearance.", + "partNumber" : " TPS7A85", + "allResponseList" : [ { + "contentId" : "3324339", + "userName" : "JCHK", + "rankPoints" : "27915", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 1:54 PM", + "userId" : "1108707", + "content" : "Hi Sangeetha, The TPS7A85 has an internal charge pump (CP) that attempts to double VIN (Internally it is clamped as not to exceed the absolute maximum rating of the device). So for your cases above: 1, With VIN=2.2V, the internal CP would be providing 4.4V for the gate Bias. In this case, the external 3.3V has no impact. 2. With VIN=1.4V, the internal CP would be providing 2.8V. So in this case, the external 3.3V on VBIAS would improve the headroom which will help with PSRR. I hope this clarifies the issue for you." + }, { + "contentId" : "3324715", + "userName" : "sangeetha s1", + "rankPoints" : "110", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 5:28 PM", + "userId" : "6225355", + "content" : "Hi John, Thank you for reply," + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS7A85" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899213.json b/data/json/DLP/899213.json new file mode 100644 index 0000000000000000000000000000000000000000..d6670b4bf2ced980e274844b948e40aa23366391 --- /dev/null +++ b/data/json/DLP/899213.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899213", + "reporterName" : "Kaji@PAN", + "rankPoints" : "3240", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ21061: Questions about operation", + "rankName" : "Genius", + "replies" : " 3", + "views" : " 21", + "queryText" : "Part Number: BQ21061 Hi, I am considering using the BQ21061 device. I would like to ask the following questions about device behavior. 1.About MR function Is the following operation when waking up from Ship Mode? When the button is pressed (wake1), PMID is output and at the same time interrupts the MCU. Then, the active mode is maintained by the I2C control from the MCU. If VBAT is present / VIN is not present within Wake2, will it remain in Ship Mode? 2.How to enter Ship Mode, but do not want to enter it by long pressing the button. Can I select it in I2C settings? 3.When LDO / LS is not used, what should be done for VINLS pin and LS / LDO pin? 4.Does the overcurrent protection work when the battery is being charged? Or is the battery discharging? 5.The data sheet reads \"Note that the flag bit will be reset when the bit is read by the host even if the fault has not been cleared.\" If CE is not turned off even if it is reset, I think that the safety timer is in the operating state. Is the flag on I2C gone? 6.Is there a battery overvoltage protection function? 7.Is charging continued during Battery Supplement Mode? 8.Regarding battery tracking, what kind of control does it have when there is only VBAT? 9.[No termination will occur if the charge current reaches ITERM while VINDPM or DPPM is active as well as the thermal regulation loop.] Is described in the data sheet. Even if the charging current reaches the end current due to thermal regulation during charging, is it possible to mean that it will not be fully charged? 10.It has a function to control the charging current by the load current. Is this patented by TI? Other manufacturers also have similar functions. Best regards,", + "partNumber" : " BQ21061", + "allResponseList" : [ { + "contentId" : "3324934", + "userName" : "Raheem", + "rankPoints" : "16655", + "rankName" : "Genius", + "date" : "Apr 22, 2020 9:59 PM", + "userId" : "4697250", + "content" : "Hello, 1) When /MR is pressed to exit shipmode, the device waits for the twake1 timer to exppire. After this, PMID is turned on but there is no interrupt since PMID or LDO typically powers the MCU. SHipmode exits is only dependent on Wake1 so the device will stil exit shipmode even if /MR is held till wake2. VBAT or VIN has to be present to power the device. The device automatically exits shipmode upon VIN plugin. 2) Yes. You can enter shipmode through I2C setting B7 in reg 0x35 to 1 3) You can ground both VINLS and LDO pins. 4)As long as the battery is being discharged, the overcurrent protection is active. 5)Flag bits are cleared upon read even if the fault remains. So the timer fault flag will be reset after read. 6) The battery voltage regulation loop works as the overvoltage protection. The charger ensures the battery doesnt get charged above the VBATREG setting. There is overvoltage protection on the input. 7) No. CHarging will stop if the device enters supplement mode because battery current will be needed to supplement input current. 8) What do you mean by control? The only difference with battery tacking is that the output voltage follows the battery voltage with a 4.7% offset. 9) Typically, charging current is reduced when in DPPM or VINDPM loop so proper charging cannot occur. Hence the device will wait until this loop is no longer active to properly terminate charge. 10) Please reach out to thecompany legal team for any patent questions." + }, { + "contentId" : "3325099", + "userName" : "Kaji@PAN", + "rankPoints" : "3240", + "rankName" : "Genius", + "date" : "Apr 23, 2020 1:57 AM", + "userId" : "4834730", + "content" : "Thank you for your reply. Regarding the content of the 8th question, what kind of voltage is output from PMID when there is no IN and only BAT when battery tracking is set? Is the BAT voltage output to PMID as is? Best regards," + }, { + "contentId" : "3326167", + "userName" : "Raheem", + "rankPoints" : "16655", + "rankName" : "Genius", + "date" : "Apr 23, 2020 7:25 PM", + "userId" : "4697250", + "content" : "when VIN is not present, PMID will be battery voltage." + } ], + "tags" : [ "/support/power-management/f/196/tags/bq21061" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899216.json b/data/json/DLP/899216.json new file mode 100644 index 0000000000000000000000000000000000000000..356d02a85a80d323cd31bb256791ee988e9ba4bd --- /dev/null +++ b/data/json/DLP/899216.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "899216", + "reporterName" : "Tom Lightning", + "rankPoints" : "240", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS55165-Q1: Layout Considerations", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 24", + "queryText" : "Part Number: TPS55165-Q1 Hi, since my last layout for the TPS55165-Q1 didn't work well, i'm trying to develop a new layout. Regarding the layout of the TPS55165Q1 in almost all threads are mentioned the pcb layout of the evaluation board and the application note SLVAEJ2. Due to the difference between the layouts of the evaluation board and the layout of fig. 4 and 6 from the application note, I do not know which layout i should consider for my own layout. So should i rather use the layout of the evaluation board or the other one? In my opinion the design mentioned in the application note manages the PGND and GND connection better than the evaluation board, because the analog ground is exclusively connected to the power ground by the power pad. In order to achieve a good performance I should consider at least two solid GND copper planes in addition to the quite solid gnd area on the side on which the TPS55165Q1 is placed, am I getting this right? Best regards, Tom", + "partNumber" : " TPS55165-Q1", + "allResponseList" : [ { + "contentId" : "3325067", + "userName" : "Helen chen", + "rankPoints" : "32965", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 1:28 AM", + "userId" : "4197150", + "content" : "Dear Sir, EVM and the app note from different author. For the AGND/PGND, Vreg/Vreg-q connection, you can refer to the app note." + }, { + "contentId" : "3328482", + "userName" : "Tom Lightning", + "rankPoints" : "240", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 8:26 AM", + "userId" : "4553773", + "content" : "Okay. I have done a new layout, which can be seen in the following figures. The green and brown copper planes are on GND potential. Is it permitted to route the VINL and IGN signal like this? Or should the VINL be routed separatley? Do you have any further advise regarding to the layout? Thanks!" + }, { + "contentId" : "3329782", + "userName" : "Helen chen", + "rankPoints" : "32965", + "rankName" : "Mastermind", + "date" : "Apr 28, 2020 2:33 AM", + "userId" : "4197150", + "content" : "Dear Sir, Your VINL VINP connection looks strange You can refer to the App note figure3. VINP is power pin, you pour it with power while VINL need to be carefully single point connected. TPS55165 is very sensitive. especially when it works in the boost mode. currently output cap connection is a little bit strange. I posted the EVM sch and pcb. Please strictly lay the pcb according to it if you put the inductor and boot strap cap on the top layer.1541.HVL143B_Main.SchDoc8168.HVL143B_PCB.PcbDoc" + }, { + "contentId" : "3330041", + "userName" : "Tom Lightning", + "rankPoints" : "240", + "rankName" : "Prodigy", + "date" : "Apr 28, 2020 7:42 AM", + "userId" : "4553773", + "content" : "Hello, what looks strange about the VINL connection? To me it is connected to the VINP potential in one single point. Or should I route the IGN signal separately from the VINL signal? I can't redesign the layout of the evaluation board, because the trace to the VINL signal would violate rules regarding to clearence. Furthermore I am not allowed to use caps larger than 0805, because the risk of cracks in the ceramic is increased. Therefore I can't design the output capacitors one to one to the evaluation board. Best regards, Tom" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS55165_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899218.json b/data/json/DLP/899218.json new file mode 100644 index 0000000000000000000000000000000000000000..35857a9be6dbd79957f6ca4526ee99987a397280 --- /dev/null +++ b/data/json/DLP/899218.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899218", + "reporterName" : "Umang Joshi", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "AWR1843BOOST: Hardware not connected; waiting for data", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 28", + "queryText" : "Part Number: AWR1843BOOST Hi, I am a new user of AWR1843BOOST and the device is not getting connected to the mmWave demo visualizer. Here are the steps that I followed: Installed mmWave SDK 3.3 and XDS EMU pack. Flashed the demo code on the hardware through the online UniFlash tool. The image was taken as specified in the user guide \"xwr18xx_mmw_demo.bin\" located in \"C:\\ti\\mmwave_sdk_03_03_00_03\\packages\\ti\\demo\\xwr18xx\\mmw\". Kept the evaluation board in flash programming mode through the SOP jumpers in the configuration of SOP1 in OFF state and SOP2 & SOP0 in ON state. While flashing, the CFG_port was selected as the target COM port in the \"Settings and Utilities\" section. The COM port number \"XDS110 Class Application/ User UART\" is selected as \"CFG_port\". Switched the board OFF and changed the SOP jumpers back for functional mode i.e. SOP0 is in ON state and SOP2 & SOP1 are in OFF state. Powered ON the device (including a click on the NRST button to boot the device properly as stated in the user guide) and plugged the USB into the PC. The device manager recognizes the XDS in its two COM ports named \"XDS110 Class Application/ User UART\" and \"XDS110 Class Auxiliary Data port\". Opened mmWave Demo Visualizer and selected the appropriate COM ports for DATA_port and CFG_port as mentioned in the user guide and default baud rates. Also the When clicked \"Ok\" it starts connecting to the device but only 1 out of 2 targets gets connected i.e. the CFG_port and for the DATA_port it is constantly showing \"waiting for data\". When Clicked on the bottom left icon then it shows \"Hardware not connected\". Could someone please help in debugging this error? I believe I have followed every step as per the user guides. Thanks, Umang", + "partNumber" : " AWR1843BOOST", + "allResponseList" : [ { + "contentId" : "3324312", + "userName" : "Jitendra Gupta", + "rankPoints" : "33995", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 1:41 PM", + "userId" : "1717369", + "content" : "Hello Umang, After the step 9, did you try sending CLI commands to device. Waiting for data: means it is waiting for object data from the device and that happens only after you send CLI commands. (send config to mmwave sensor : button OR load config from PC button) Regards, Jitendra" + }, { + "contentId" : "3326780", + "userName" : "Umang Joshi", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 7:52 AM", + "userId" : "6330004", + "content" : "Hello Jitendra, Thank you for your response. No, as soon as I click \"Ok\" after writing the correct COM ports to be connected, it starts to connect with the hardware. I suppose there should be a handshake required between the PC and the device so as to start communicating but the device is not acknowledging back. Best, Umang" + }, { + "contentId" : "3327121", + "userName" : "Kyle Cousino", + "rankPoints" : "19220", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 2:29 PM", + "userId" : "4381542", + "content" : "Umag, Did you at least try clicking on the \"Send Config to mmWave Device?\" It does not appear that you have attempted to send a configuration file to the device. Regards, Kyle" + } ], + "tags" : [ "/support/sensors/f/1023/tags/AWR1843BOOST", "/support/sensors/f/1023/tags/UniFlash", "/support/sensors/f/1023/tags/awr20_5F00_p2_5F00_swa20_5F00_sdk" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899219.json b/data/json/DLP/899219.json new file mode 100644 index 0000000000000000000000000000000000000000..71bef4b7ad3b39c569f619e0ec36d8963947ffa3 --- /dev/null +++ b/data/json/DLP/899219.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899219", + "reporterName" : "David Trotter", + "rankPoints" : "520", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM25122-Q1: LM25122-Q1 PCB layout", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 13", + "queryText" : "Part Number: LM25122-Q1 I have a question about PCB layout for the LM25122-Q1. On the reference designs /lit/df/tidrvn6/tidrvn6.pdf A copper area under and around the LO switching MOSFETS Q3 Q4 Q7 and Q8 is present through all the layers including the ground plane and stitched together with VIAs. Is this recommended? Surely a complete ground plane layer is beneficial for reducing EM emissions. What is the reason for this large copper area on all layers? Thanks David", + "partNumber" : " LM25122-Q1", + "allResponseList" : [ { + "contentId" : "3326431", + "userName" : "Youhao Xi", + "rankPoints" : "39085", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 12:45 AM", + "userId" : "1880260", + "content" : "Hi David, Thank you for consider the LM25122 solutions. These are for head dissipation through the PCB. Without them, you may have to add heatsink to the FETs. You are right that the FET drain pad is the switch node and it can affect EMI, and it can be mitigated by applying additional shielding. Anyway, for you final product, you need to trade off between EMI and thermal management. Thanks, Youhao Xi, Applications Engineering" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM25122_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899222.json b/data/json/DLP/899222.json new file mode 100644 index 0000000000000000000000000000000000000000..203fcd6603feb71ff496f75b76da7f918d9f946c --- /dev/null +++ b/data/json/DLP/899222.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899222", + "reporterName" : "Wayne Wang20", + "rankPoints" : "2175", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS564201: What if a -12V is applied to TPS564201", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 11", + "queryText" : "Part Number: TPS564201 Hi team, My customer is using TPS564201 and the project is in MP stage. But in the test process in the production line, customer mistakenly apply a -12V to TPS564201 input and the -12V input last for 2mins. So with a -12V input for 2mins, will the device 100% get damaged or it may have a chance to survive in the -12V condition without any damage? Thanks. Best regards, Wayne", + "partNumber" : " TPS564201", + "allResponseList" : [ { + "contentId" : "3324640", + "userName" : "Bruce Lu (MCP)", + "rankPoints" : "780", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 4:41 PM", + "userId" : "5032350", + "content" : "Hi Wayne, When a negative voltage is applied to the input pin, there should be negative current flow from GND to Vin pin through internal body diodes. If no current limit on the negative voltage, there is a risk that IC may be damaged or it can survive but its reliability may be affected. Thanks." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS564201" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899228.json b/data/json/DLP/899228.json new file mode 100644 index 0000000000000000000000000000000000000000..96339023fda34a8778cb7556f3a65bf58e8d61fd --- /dev/null +++ b/data/json/DLP/899228.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899228", + "reporterName" : "Zhanpeng Li", + "rankPoints" : "570", + "resolutionStatus" : "", + "ticketName" : "TPS53681: Vout dropp and Mfr:Fault", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 13", + "queryText" : "Part Number: TPS53681 Hi team, [case]： 矿机策略.docx when change the Vout-droop to 1m, the output voltage can back to normal. Why is that happen? but the system also shows that Mfr:Fault could you help check the relationship between Vout droop and Mfr:Fault? BR Brandon.", + "partNumber" : " TPS53681", + "allResponseList" : [ { + "contentId" : "3324254", + "userName" : "Chasel Chen", + "rankPoints" : "4335", + "rankName" : "Expert", + "date" : "Apr 22, 2020 1:05 PM", + "userId" : "3828515", + "content" : "Hi, Can you click the STATUS page to see the detail? Thanks" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS53681" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899239.json b/data/json/DLP/899239.json new file mode 100644 index 0000000000000000000000000000000000000000..bfcac2301e8b6a583447d0ef7bfe7521844a7740 --- /dev/null +++ b/data/json/DLP/899239.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899239", + "reporterName" : "Eric Danoy", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS2663: TPS2663 : Connecting 2 TPS2663 in parallel", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 16", + "queryText" : "Part Number: TPS2663 Hi I'm working on a new design and I intend to use a TPS2663 to protect the primary DC/Dc of my design. I need protection for reverese polarity, and overvoltage.. I also need protection for load dump but I will USe TVS diode before the TPS2663I also need to limit the inrush current. The system is an emebdedded system for automotive and railwau application. The system shall work in the range of 12 to 36 V DC (24 V DC nominal voltage trough a battery) and the maximal input current (nominal case) will be 10 A. The TPS2663 seems to be a good cadidate excpet for the max current. It seems I can use 2 TPS266 in parallel but is there any specific way to connect the 2 TPS2663. Another solution could be the use off a LM74700-Q1 with a high side switch . Thanks for your answer rRgards Eric", + "partNumber" : " TPS2663", + "allResponseList" : [ { + "contentId" : "3324228", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 12:49 PM", + "userId" : "4743883", + "content" : "Hi Eric, Thanks for reaching out! Doesn't you need automotive grade part ? LM74700-Q1 cannot be used as a high-side switch. Please look at LM5060-Q1 for automotive applications and let me know your thoughts. What is the max load current ? Best Regards, Rakesh" + }, { + "contentId" : "3324598", + "userName" : "Eric Danoy", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 4:10 PM", + "userId" : "6330196", + "content" : "Hi Rakesh Thanks for your quick answer I don't really need automotive grade components I know that LM747000 is not a high side switch, I just want to use it to protect the system from reverse battery connection. The Idea is to use a LM747000 to protect frombattery reverse connection followed by 2 x TPS2663 in parallel. The transcient protection will be done using TVS diode in front of the LM747000. Do you think this could be a good solution? If so can you please explain me how to configure the TPS2663 to make them work in parallel (just connecting the 2 out together? Or is there any specific way to do that?). The maximum nominal load current will be 10 A and I can limit the inrush current to a very close value of that max nominal current because the max load current when power supply is on will be less than 2A. I have a look at the LM5060 data sheet perhaps it can satisfy my requirements. In fact I need to protect the font DC/DC converter of my system from reverse battery connection and for overvoltage. I also need to limit the inrush current to approximatively 15 A during 1 second. As I understand the LM5060 doesn't limit the current it shuts down if there is an overcurrent so it's not really a current limitation for inrush current. I also don't understand how the current limit value is set on this device. Best regards ERic" + }, { + "contentId" : "3325203", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 4:21 AM", + "userId" : "4743883", + "content" : "Hi Eric, TPS2663 can be used in parallel configuration following the concept discussed in app note /lit/an/slva836/slva836.pdf however we need to yet evaluate it. I have attached the circuit configuration. You would need single BFET (external FET) capable of handling full load current and then parallel TPS2663. Connect IN, OUT, IN_SYS, UVLO, OVP, dVdT, ILIM, IMON pins together for time synchronization and uniform reference settings. TPS2663_parallel_config.docx Best Regards, Rakesh" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM74700_2D00_Q1", "/support/power-management/f/196/tags/TPS2663" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899247.json b/data/json/DLP/899247.json new file mode 100644 index 0000000000000000000000000000000000000000..3c5d1d6228f1a47a300079dcb122d604fee4e7be --- /dev/null +++ b/data/json/DLP/899247.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899247", + "reporterName" : "Akshay Patil1", + "rankPoints" : "170", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ25150: How to detect battery charge current in pre-charging mode", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 21", + "queryText" : "Part Number: BQ25150 Hello , I want to read battery charging current in pre-charging mode. In BQ25150's data sheet, the formule is as -> %ICHARGE = (ADCDATA_ICHG*100)/0.8*65536. But this is for fast charging current. Battery charge current in PRE = 22.5 mA & In FAST = 110 mA. Pre-to fast threshold = 3 V. If battery voltage is 2.8 then it gave 110mA.why ?? How to detect battery charge current in pre-charging mode ?? /Akshay P", + "partNumber" : " BQ25150", + "allResponseList" : [ { + "contentId" : "3324703", + "userName" : "Raheem", + "rankPoints" : "16655", + "rankName" : "Genius", + "date" : "Apr 22, 2020 5:18 PM", + "userId" : "4697250", + "content" : "Hello, The charge current equation is the same for pre charge and fast charge. Since the value returns a percentage, you should get back the percentage of the pre-charge current setting." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25150" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899251.json b/data/json/DLP/899251.json new file mode 100644 index 0000000000000000000000000000000000000000..28137a5404fae8b5097d97526c5234c7d62f6937 --- /dev/null +++ b/data/json/DLP/899251.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899251", + "reporterName" : "MEDJEK Arezki", + "rankPoints" : "100", + "resolutionStatus" : "Resolved", + "ticketName" : "LM3880: LM3880", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 16", + "queryText" : "Part Number: LM3880 when simulating the LM3880 sequecner i obtained those results , i was supposed to have three power-up sequences after 10ms because the value of C1 is designed such as the EN pin set on after 10ms according to the datasheet of LM3880. i did the right schematic circuit as in the datasheet . why didn't i obtained the right results ?", + "partNumber" : " LM3880", + "allResponseList" : [ { + "contentId" : "3324508", + "userName" : "yihe", + "rankPoints" : "23920", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 3:26 PM", + "userId" : "303879", + "content" : "Hello With 56uf cap, the delay is 10s instead of 10ms T = 1.25*C/7uA. Regards Yihe" + }, { + "contentId" : "3324774", + "userName" : "MEDJEK Arezki", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 6:17 PM", + "userId" : "6302613", + "content" : "i did the simulation again with C1 = 0.056uF which correspond to 10ms delay on EN voltage , but as you can see neither EN voltage signal is delayed nor the sequence Flag1 is set correctly , it should waits 10ms after the EN voltage is set , which means 20ms for Flag1 to be released, help me get the right sequence signals please" + }, { + "contentId" : "3324842", + "userName" : "yihe", + "rankPoints" : "23920", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 7:41 PM", + "userId" : "303879", + "content" : "Hi The EN comes with VCC together therefore it violates the device function spec Could you just run the default model without any modification to see whether you can get correct output? Regards Yihe" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM3880" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899255.json b/data/json/DLP/899255.json new file mode 100644 index 0000000000000000000000000000000000000000..8bf675b15e1ece7c1a751a2fa71f61d3d4abf6fc --- /dev/null +++ b/data/json/DLP/899255.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899255", + "reporterName" : "Akash S", + "rankPoints" : "185", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS2372: PMP21115: Schematics", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 10", + "queryText" : "Part Number: TPS2372 Hi, Can you please support with the schematics of the reference design.", + "partNumber" : " TPS2372", + "allResponseList" : [ { + "contentId" : "3324447", + "userName" : "Michael Pahl", + "rankPoints" : "4915", + "rankName" : "Expert", + "date" : "Apr 22, 2020 2:53 PM", + "userId" : "6102321", + "content" : "Hello Akash, Please accept my connect request and we can continue this conversation in private messenger. Additionally we have a dual PoE with Redundancy on the web: If this post answers your question, please indicate so by marking this thread as resolved. Thank you. Regards, Michael P. Applications Engineer customer organization" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS2372" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899265.json b/data/json/DLP/899265.json new file mode 100644 index 0000000000000000000000000000000000000000..a81203d91718eb8f64dc849ed2302c7a5d5346da --- /dev/null +++ b/data/json/DLP/899265.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899265", + "reporterName" : "Downey Kim", + "rankPoints" : "735", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ25601EVM-877: Can you provide EVM schematic file?", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 22", + "queryText" : "Part Number: BQ25601EVM-877 Hicompany team, Can you provide EVM schematic file? (ALTIUM) Please check.. Thanks, Downey KIM.", + "partNumber" : " BQ25601EVM-877", + "allResponseList" : [ { + "contentId" : "3325123", + "userName" : "Kedar Manishankar", + "rankPoints" : "9290", + "rankName" : "Genius", + "date" : "Apr 23, 2020 2:19 AM", + "userId" : "4996925", + "content" : "Hi Downey, Page 15 of the BQ25601 user guide shows the full schematic of the EVM: /lit/ug/sluubl4a/sluubl4a.pdf This is exported directly from Altium and shows the exact same information as the altium schematic src file." + }, { + "contentId" : "3325211", + "userName" : "Downey Kim", + "rankPoints" : "735", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 4:40 AM", + "userId" : "6095174", + "content" : "Hi Kedar, The circuit diagram in the Guide document was checked. I requested a scr file to facilitate circuit design. could you provide the altium schematic src file? My e-mail address is below. downey.kim@arrow.com Thanks." + }, { + "contentId" : "3329049", + "userName" : "Kedar Manishankar", + "rankPoints" : "9290", + "rankName" : "Genius", + "date" : "Apr 27, 2020 3:45 PM", + "userId" : "4996925", + "content" : "Thread resolved offline." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25601EVM_2D00_877" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899270.json b/data/json/DLP/899270.json new file mode 100644 index 0000000000000000000000000000000000000000..527706f5f801203dc6f9b3a9cc7d7e00c7787dc1 --- /dev/null +++ b/data/json/DLP/899270.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899270", + "reporterName" : "Giulio Zoppi", + "rankPoints" : "70", + "resolutionStatus" : "", + "ticketName" : "TPS57114-Q1: Question about the position of the sense resistor in relation to the regulator's feedback loop", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 16", + "queryText" : "Part Number: TPS57114-Q1 Hello, I am involved in the design of a configurable power management which current and voltage telemetry. For that we are exploiting a digipot in the voltage divider and a sense resistor (10m Ohm) connected to your INA3221 (voltage and current monitor). I have a question about the position of the feedback loop related to sense resistor and load (a digital device with an highly variable current profile). I believe that the optimal position for the feedback tap would be between the sense resistor and the load in order to compensate the sag that we otherwise would have if we put the sense resistor outside the feedback tap. Can you see any drawback with this solution? What if we put the sense resistor and hence the voltage and current sense very close to the loading device? would thet be ok?", + "partNumber" : " TPS57114-Q1", + "allResponseList" : [ { + "contentId" : "3324694", + "userName" : "Dorian Brillet de Cande", + "rankPoints" : "5365", + "rankName" : "Expert", + "date" : "Apr 22, 2020 5:13 PM", + "userId" : "5350960", + "content" : "Hello Giulio, I want to make sure I understand your system right. Can you share a schematic of what you are trying to achieve? Thank you. Regards, Dorian" + }, { + "contentId" : "3325400", + "userName" : "Giulio Zoppi", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 8:26 AM", + "userId" : "4888674", + "content" : "Hello Dorian, thanks for your fast reply. Please give a look at the pictures below with options 1 and 2. Case 2 should guarantee the regulation at the load (node B) with less ripple. thanks G" + }, { + "contentId" : "3326776", + "userName" : "Dorian Brillet de Cande", + "rankPoints" : "5365", + "rankName" : "Expert", + "date" : "Apr 24, 2020 7:43 AM", + "userId" : "5350960", + "content" : "Hello Giulio, Unfortunately I cannot see the picture, I send you a request to have a private conversation. Once you accept I will come back to you as soon as possible. Thanks a lot! Regards, Dorian" + } ], + "tags" : [ "/support/power-management/f/196/tags/INA3221", "/support/power-management/f/196/tags/TPS57114_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899273.json b/data/json/DLP/899273.json new file mode 100644 index 0000000000000000000000000000000000000000..315875d2890b20ce72eafd788edbefdafcbc6565 --- /dev/null +++ b/data/json/DLP/899273.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899273", + "reporterName" : "Pavels Ivanovs", + "rankPoints" : "80", + "resolutionStatus" : "", + "ticketName" : "BQ27530-G1: BQ27530-G1 Charge current temperature control, JEITA-like specifications.", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 18", + "queryText" : "Part Number: BQ27530-G1 Hi everyone, I've tried to set the charge current limits basing on the battery temperature using Charge Current Tn parameters of the Fuel Gauge registers, but it seems like their values don't limit the charge current at all. I've played with different values, even tried to limit the charge current to 5% of the designed capacity value for all temeperature ranges. The only value of Charge Current Tn parameters that seems to affect the charge current is 0 because at this value the charge current drops to 0A. How do I make this system to actually limit the charge current basing on these Charge Current Tn parameters? Regards, Pavels P.S. I'm using bqstudio 1.3.86 for changing these paramers and to see the measured battery charge current. The system consists of BQ27530-G1 that controls BQ24161 battery charger. Golden Image file is attached to this message. Fuel Gauge Registers.gg.csv", + "partNumber" : " BQ27530-G1", + "allResponseList" : [ { + "contentId" : "3324930", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 9:53 PM", + "userId" : "1864278", + "content" : "We will take a look and get back to you. Andy" + }, { + "contentId" : "3327599", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 24, 2020 9:54 PM", + "userId" : "3528441", + "content" : "Hello Pavels, The gauge only passively reports values in the charge current and charge voltage registers. Your host will have to send the commands to the charger to limit unless you are using the gauge in BMU fashion through the BSCL,BSDA." + }, { + "contentId" : "3328386", + "userName" : "Pavels Ivanovs", + "rankPoints" : "80", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 6:52 AM", + "userId" : "5244747", + "content" : "Yes, but that's the thing, the fuel gauge is already configured to control the charger through these BSCL and BSDA lines. However, it doesn't seem to work only when it comes to limiting the charge current basing on the ambient temperature.8270.Battery Charger.pdf" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ27530_2D00_G1%2bCharge%2bTemperature%2bControl", "/support/power-management/f/196/tags/BQ27530_2D00_G1", "/support/power-management/f/196/tags/BQ24161", "/support/power-management/f/196/tags/bqStudio" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899275.json b/data/json/DLP/899275.json new file mode 100644 index 0000000000000000000000000000000000000000..93254fadd30fef5a9f858e8ccb7ab7fffc317fd1 --- /dev/null +++ b/data/json/DLP/899275.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899275", + "reporterName" : "Revanth A1", + "rankPoints" : "170", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ25616: No Battery condition", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 9", + "queryText" : "Part Number: BQ25616 Hi, Iam planning to use BQ25616 battery management IC in my design with input volatge 5 - 12V at 2A, In my design sometimes there wont be battery available but input power supply will be there in that case will I get output from the SYS Pin? what will be the voltage i will be getting as output if battery is not there?", + "partNumber" : " BQ25616", + "allResponseList" : [ { + "contentId" : "3325152", + "userName" : "Kedar Manishankar", + "rankPoints" : "9290", + "rankName" : "Genius", + "date" : "Apr 23, 2020 2:46 AM", + "userId" : "4996925", + "content" : "Hi Revanth, When there is no battery connected AND charge is enabled, the device tries to regulate VBAT to charging voltage (VREG) then terminate. After certain time, VBAT may drop below recharge threshold and the device charges VBAT to charging voltage again. So the charger status switches between charging in progress and charging complete and STAT pin blinks. As battery is absent, the output capacitor is being charged, so the cyclic transition is a function of recharge and termination deglitch timers, as the small output capacitance will charge quickly compared to a real battery. Section 9.3.6.1 Narrow VDC Architecture describes behavior of VSYS w.r.t VBAT. As VBAT (when battery is floating) is around the VREG voltage (> VSYSMIN) BATFET is fully on and the voltage difference between the system and battery is the VDS of the BATFET, so VSYS will also track VBAT as VBAT behavior is described above." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25616%2bbattery", "/support/power-management/f/196/tags/BQ25616" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899277.json b/data/json/DLP/899277.json new file mode 100644 index 0000000000000000000000000000000000000000..06f5b57a0db04e2e9f2a53388049265cd6552826 --- /dev/null +++ b/data/json/DLP/899277.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899277", + "reporterName" : "Needhu Gunasegaran", + "rankPoints" : "2175", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ7718: Replacement protector for Lithium Titanium Cells", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 17", + "queryText" : "Part Number: BQ7718 Hello Team, One of my customer had the following question. we would like to use the BQ40Z80 also for lithium titanate cells, therefor we need a battery protector similar to BQ7718 with 2.9V cut off, doescompany has something like that? Two questions from my side. Is BQ77915 the best Protector replacement? (that's what i proposed him, BQ7791500 to be precise) Would the BQ40Z80 work here? (Stupid question probably but, do we need special FW for different Cell chemistry?) Thanks and Best Regards, Needhu", + "partNumber" : " BQ7718", + "allResponseList" : [ { + "contentId" : "3324556", + "userName" : "Matt Sunna", + "rankPoints" : "24930", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 3:43 PM", + "userId" : "269312", + "content" : "Hi Needhu, The BQ77915 is factory programmed and available versions only have OV down to 3800mV. If a new part number was created, the lowest OV voltage possible to program is 3000mV. So I do not think this would work for this application. The BQ40Z80 might work here. The protection thresholds are programmable and could be configured for this battery type. It also has secondary protection features, so some users use it as the primary and secondary protector (although some users like to have a separate device). Since this might be the only option for this application, I suggest creating a new E2E question on the BQ40Z80 - this way it will be assigned to a gauge expert that can answer all of the questions about this device. Best regards, Matt" + }, { + "contentId" : "3325892", + "userName" : "Needhu Gunasegaran", + "rankPoints" : "2175", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 3:51 PM", + "userId" : "4861431", + "content" : "Hi Matt, Thanks for the feedback. Best Regards, Needhu" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ7718", "/support/power-management/f/196/tags/BQ77915", "/support/power-management/f/196/tags/bq40z80" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899286.json b/data/json/DLP/899286.json new file mode 100644 index 0000000000000000000000000000000000000000..9699e4256f6306de202d8ea71b038805fad49c09 --- /dev/null +++ b/data/json/DLP/899286.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899286", + "reporterName" : "Manuel Haag", + "rankPoints" : "20", + "resolutionStatus" : "", + "ticketName" : "BQ34110: EOS learning never reach relaxation", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 19", + "queryText" : "Part Number: BQ34110 Hi I am using the BQ34110 gas gauge for our backup battery system an got some problems with the EOS learning cycle. First some application information. The Battery: acid lead 1200mAh 12 Cell 24V nominal voltage gg-File: Steps already done: Calibrate voltage, current and temperature Configure the date flash for our application (see gg-file) Generate a CEDV-profile with the GPC tool Learned FFC with a learning cycle Verified SOC with different loads. Tried to start a EOS learning cycle without success About the EOS-learning problem: We are using discharge before charge (LSM = 1), because the charger is usually connected to the battery (floating). We disconect the charger. The system is then supplied with the external supply. After that we trigger a learning cycle with the EOS_START_LEARN() or EOS_RCELL_RRATE_LEARN() command. LCMD and LRLX get set However, we never reach the relaxation condition. Therefore, the cycle does not start. Relaxation Condition according to the TM: If the change in the consecutive 100-s averages of Voltage() is less than 4 μV, then relaxation is deemed achieved. We never reach this condition. The RXLX never gets 0 and the LDSG never get 1. There is no discharge through the battery. Questions: Is there something wrong with our setup? Is it possible to change the 4uV over 100s? It is clear that in the beginning (when disconnecting the charger) the voltage is decreasing slowly. But how long do I have to wait? Is the 4uV per cell or pack? Are there other issues that I don’t see? Thank you in advanced.", + "partNumber" : " BQ34110", + "allResponseList" : [ { + "contentId" : "3324617", + "userName" : "Manuel Haag", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 4:21 PM", + "userId" : "6307938", + "content" : "Here is the gg-file if needed: bq34110.gg.csv" + }, { + "contentId" : "3324966", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 10:50 PM", + "userId" : "1864278", + "content" : "We will take a look and get back to you. Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ34110", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2b%2bBQstudio", "/support/power-management/f/196/tags/_2300_bq34110", "/support/power-management/f/196/tags/_2300_EOS" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899288.json b/data/json/DLP/899288.json new file mode 100644 index 0000000000000000000000000000000000000000..e3ca1bc727e37a2b1d7ab7d4afa35bda8e087ac7 --- /dev/null +++ b/data/json/DLP/899288.json @@ -0,0 +1,71 @@ +{ + "ticketNumber" : "899288", + "reporterName" : "Shenhua Zhang", + "rankPoints" : "520", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS544C20: Two issues in latest 7.2.1 GUI", + "rankName" : "Prodigy", + "replies" : " 7", + "views" : " 40", + "queryText" : "Part Number: TPS544C20 Hi expert, Please help confirm below two issues in 7.2.1 GUI. Issue 1: When customer creates one off-line project, their choice is as shown. There is one error, for TPS544X20’s package is LQFN. Issue 2: Here comes the question: The revision in GUI is 0x2, but in datasheet is 0x3. Obviously, it only supports to read.", + "partNumber" : " TPS544C20", + "allResponseList" : [ { + "contentId" : "3326333", + "userName" : "Gerold Dhanabalan - Online Design Tools", + "rankPoints" : "8770", + "rankName" : "Expert", + "date" : "Apr 23, 2020 10:28 PM", + "userId" : "1132529", + "content" : "Hi Shenhua, Thanks for bringing this to our attention. We will confirm it and get back to you. regards, Gerold" + }, { + "contentId" : "3326555", + "userName" : "Peter James Miller", + "rankPoints" : "19805", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 3:09 AM", + "userId" : "8518", + "content" : "Shenhau Zheng, The revision code in the TPS544C20 project file is likely from a pre-release version of the TPS544C20 and has not been updated to align with the release version. It will not affect the functionality of the project file as the revision code will be masked out during device identification when loading the project file. As for the packages, I will review them with the FUSION team and see if we can get them updated and aligned prior to the next FUSION release." + }, { + "contentId" : "3326569", + "userName" : "haojie tian", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 3:26 AM", + "userId" : "6331603", + "content" : "Hi Peter, Different revison code will cause different Devide_code, and Devide_code is just for reading. I don't know if it will bring new problems if someone use .csv files, because for now we have ignored Device_code in our verification. Thanks, Haojie" + }, { + "contentId" : "3326583", + "userName" : "Peter James Miller", + "rankPoints" : "19805", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 3:46 AM", + "userId" : "8518", + "content" : "haojie tian I will check on the programming script file, but most likely it does not contain verification of DEVICE_CODE because it is read-only. When loading a project file, FUSION does not ignore the DEVICE_CODE, only the lower 4 bits that make up the REVISION_CODE, bit 15:4 are still used." + }, { + "contentId" : "3326597", + "userName" : "haojie tian", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 4:02 AM", + "userId" : "6331603", + "content" : "Thanks Peter! If you think it's OK to keep no change about revison 0x2 in FUSION, we are OK. As I know, before generating the script file, it could choose not check the box of 'including the device_code'. And in the script file, it does not contain verification of Device_code. The reason why I ask this is: #1. I checked the box of 'including the device_code' #2. Our former code checked all READBYTE/READWORD lines in the script file, now we just check the READBYTE/READWORD lines the same as script does - check the lines below 'pause'. Now it could pass." + }, { + "contentId" : "3326606", + "userName" : "Peter James Miller", + "rankPoints" : "19805", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 4:17 AM", + "userId" : "8518", + "content" : "I will check with the FUSION team in the morning, we should be able to get this fixed in the next release, but it has most likely been this way since the TPS544C20 released in 2014." + }, { + "contentId" : "3326607", + "userName" : "haojie tian", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 4:22 AM", + "userId" : "6331603", + "content" : "Understand, it's up to your side. Thanks!" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS544C20" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899291.json b/data/json/DLP/899291.json new file mode 100644 index 0000000000000000000000000000000000000000..c8df58fe7ebbaf3d6752639bb53bbabca09aca48 --- /dev/null +++ b/data/json/DLP/899291.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899291", + "reporterName" : "Manimaran Kanesan", + "rankPoints" : "340", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS63070: Do a second regulator needed for with along with TPS63070?", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 24", + "queryText" : "Part Number: TPS63070 Dear TI, I am currently using TPS63070 for my wireless board, where TPS63070 regulates USB supply for RF Front End to maintain 5V. Another reason TPS63070 was used for different battery voltages. Initially I had other issue where COM port resets when RF Front End supplied from TPS63070, but now this issue solved. But I suppose there is a switching delay with TPS63070, this need further confirmation on my side. Question: Is TPS63070 is appropriate regulator to use to regulate USB supply, and able to support fast WiFi RF transmission, if not, I am planning to split power management a per below, a. When USB plugged in, I can usecompany TPS7A52, and TPS63070 can be off, b. When USB unplugged and board running on battery, TPS7A52 can be off and TPS63070 on and supply the entire board. Is this a good approach to go and please comment or recommend where needed. BRgds Manimaran Kanesan", + "partNumber" : " TPS63070", + "allResponseList" : [ { + "contentId" : "3324707", + "userName" : "Milos", + "rankPoints" : "7260", + "rankName" : "Expert", + "date" : "Apr 22, 2020 5:21 PM", + "userId" : "5692358", + "content" : "Hi Manimaran, Thanks for reaching out. Just to confirm first, what are your input and output voltages, and what is the output current? Best regards, Milos" + }, { + "contentId" : "3325749", + "userName" : "Manimaran Kanesan", + "rankPoints" : "340", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 2:42 PM", + "userId" : "4602090", + "content" : "Hi Milos, Thanks for the reply, The input voltage is USB 5V, for output, a. RF Front End need 5V typical (Min 4.75 and Max 5.15). b. For Host 3.3V, I have regulator for this. When USb unplugged, then using battery, is from 3V to 7.4V (two cell), but the design Max for 12V input. W Total current Max current is 750mA. BRgds Manimaran" + }, { + "contentId" : "3325915", + "userName" : "Milos", + "rankPoints" : "7260", + "rankName" : "Expert", + "date" : "Apr 23, 2020 4:03 PM", + "userId" : "5692358", + "content" : "Hi Manimaran, The TPS63070 can handle both the battery and the USB input. Just note that the output current is limited during startup. But once the device starts up, it can support your full load. Best regards, Milos" + } ], + "tags" : [ "/support/power-management/f/196/tags/USB", "/support/power-management/f/196/tags/TPS63070", "/support/power-management/f/196/tags/RFPA", "/support/power-management/f/196/tags/TPS7A52" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899292.json b/data/json/DLP/899292.json new file mode 100644 index 0000000000000000000000000000000000000000..9f22492072f35fbca3fc213e4b70562063287736 --- /dev/null +++ b/data/json/DLP/899292.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899292", + "reporterName" : "Wayne Eckertson", + "rankPoints" : "160", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS27S100: Can I AND the FLT# with EN", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 18", + "queryText" : "Part Number: TPS27S100 I would like to quicken the short circuit response time of my TPS27S100 based circuit and am considering placing an AND gate at the enable pin. The inputs to the AND gate would be the FLT# and an enable driven by a microprocessor. I assume this would create some type of oscillation due to the time delays of circuit but I am hopeful it will keep my current spike amplitude lower. The microprocessor will eventually respond to the FLT# and deassert the enable. See embedded image below. Can you see any flaws in my plan or recommend any other way of quickening the short circuit response of the TPS27S100? I am currently seeing ~170us current pulse when I assert the enable with a short to ground on the output. The datasheet claims it will shut down in less than 1us but I am not seeing that.", + "partNumber" : " TPS27S100", + "allResponseList" : [ { + "contentId" : "3324964", + "userName" : "Timothy Logan", + "rankPoints" : "5600", + "rankName" : "Expert", + "date" : "Apr 22, 2020 10:45 PM", + "userId" : "1849899", + "content" : "Hello Wayne, The 1uS number is the specification for if the device is already enabled and a short-to-ground condition occurs. Chances are you would not gain too much time with this logic as there is an inherent latency from when the device turns on to when a fault is reported on the FLT line- which is the 170uS you are seeing on the line. By connecting this to the AND gate you would likely be aggregating the latency on the additional latency required to deassert the pin via the AND gate." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS27S100" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899296.json b/data/json/DLP/899296.json new file mode 100644 index 0000000000000000000000000000000000000000..c8102d49a18668da036d2546418994c38be2b490 --- /dev/null +++ b/data/json/DLP/899296.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899296", + "reporterName" : "Wing Ng1", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC21222: Output spikes", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 19", + "queryText" : "Part Number: UCC21222 Hi I am trying to simulate a very basic Class D audio power amplifier. My problem I have is there appears to be shoot through current between my two swtiching nmos mosfets. I tried avoiding the shoot through current by implementing the dead time control, but it doesn't seem to stop the shoot through currents. An example is when output A is and output B pulses high, output A tends to have a tiny spike has output B pulses high. This tiny spike causes the two nmos mosfets to turn on at the same time causing a shoot through current. Is there anything I am doing wrong that I have done that would the low output to have a tiny spike when the other output goes high?", + "partNumber" : " UCC21222", + "allResponseList" : [ { + "contentId" : "3324614", + "userName" : "Don Dapkus", + "rankPoints" : "174575", + "rankName" : "Guru", + "date" : "Apr 22, 2020 4:19 PM", + "userId" : "1027", + "content" : "Hi, Wing, Is this a simulation?" + }, { + "contentId" : "3324760", + "userName" : "Wing Ng1", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 6:02 PM", + "userId" : "6330352", + "content" : "yes this is a simulation in ltspice of the gate driver" + }, { + "contentId" : "3326350", + "userName" : "Don Dapkus", + "rankPoints" : "174575", + "rankName" : "Guru", + "date" : "Apr 23, 2020 10:41 PM", + "userId" : "1027", + "content" : "Hi, Wing, I would try adding a gate resistor of 10-33 ohms from the output of the driver to the MOSFETs. Let me know if this helps the situation." + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC21222" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899297.json b/data/json/DLP/899297.json new file mode 100644 index 0000000000000000000000000000000000000000..15f1c7aa19100495614695446a2b04a1c0c5748c --- /dev/null +++ b/data/json/DLP/899297.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899297", + "reporterName" : "Saumil Shah60", + "rankPoints" : "365", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ24192: BQ24192 default register settings and autonomous mode understanding", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 9", + "queryText" : "Part Number: BQ24192 Hi Ning, I have tricky questions on this Watchdog functionality. 1. We are successfully able to run the charging cycle by Host and for that, we are using the Watchdog Timer disable functionality and we are selecting the Charging current by our Own. 2. We have created Some Voltage loops in that we are reading the Voltage from Fuel gauge and we are deciding on the charging current for the Battery charger. 3. For 2.8V to 3.2V, we are supplying the 140mA current for charging. 4. We have one Power ON/OFF button as well that can turn off the Host but battery can still remain present and connected with the Battery Charger. 5. Now, my query is that if the Charger is in 140mA charging current state and we are disabling the Watchdog timer also and if the user has turned off the host via Power ON/OFF button, then Charger may remain present in this 140mA state only or is there any way such that charger may start functioning with the fast charge current as well automatically? Thanks Saumil", + "partNumber" : " BQ24192", + "allResponseList" : [ { + "contentId" : "3325166", + "userName" : "Ning T", + "rankPoints" : "15365", + "rankName" : "Genius", + "date" : "Apr 23, 2020 3:07 AM", + "userId" : "145100", + "content" : "Saumil, As long as VBUS stays above VVBUS_UVLOZ or VBAT stays above VBAT_UVLOZ, and watchdog timer is disabled, charge current settings for fast charge and precharge should not change if the host is turned off. Thanks, Ning." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24192" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899298.json b/data/json/DLP/899298.json new file mode 100644 index 0000000000000000000000000000000000000000..5f20767b199f131c96d19291afff4f37afe0b20f --- /dev/null +++ b/data/json/DLP/899298.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899298", + "reporterName" : "Penn Zhang", + "rankPoints" : "850", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ24780S: Register default", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 18", + "queryText" : "Part Number: BQ24780S Hello Expert, In BQ24781 datasheet table 4 default register, 0x3BH is 0XC210H, but in the datasheet, it should be 0xC200H, could you help confirm which one is right? thanks.", + "partNumber" : " BQ24780S", + "allResponseList" : [ { + "contentId" : "3324893", + "userName" : "Tiger Zhou", + "rankPoints" : "610", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 8:48 PM", + "userId" : "1451791", + "content" : "Hi, Penn, 0xC210H is the default value." + }, { + "contentId" : "3325029", + "userName" : "Penn Zhang", + "rankPoints" : "850", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 12:39 AM", + "userId" : "5617536", + "content" : "Thanks, Tiger." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24780S" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899299.json b/data/json/DLP/899299.json new file mode 100644 index 0000000000000000000000000000000000000000..3b8706abb7db10800193585a453cfb3ce6aa0b5a --- /dev/null +++ b/data/json/DLP/899299.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899299", + "reporterName" : "Gene Qiu", + "rankPoints" : "890", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM5050-1: LM5050-1 gate driving capability", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 13", + "queryText" : "Part Number: LM5050-1 Hi Team, I have a 1000W power project using lm5050. Because this IC is used for the first time, please help me to have a look. The schematic diagram is as follows, There are two power supplys, so 2pcs lm5050 are used like datasheet), one power supply is 27V 1000W, another is 24V lead-acid battery, power 1000W, current more than 40A. Each LM5050 drives 2 pairs back-to-back N-MOS, which means 4 N-MOS q23, q24, q25 and q26 in picture above. MOSFET is AOTL66608 like below Could you help me to double check below:ow: Question 1: Is the LM5050-1 gate driving capability sufficient to dirve 4N-MOS? Question 2: When the output voltage is higher than the input voltage, whether the IC can shut down MOS normally with this Back-to-back structure? Question 3: Is there any difference or preferance for VS connected to input or the output? Thank you very much! Best Regards", + "partNumber" : " LM5050-1", + "allResponseList" : [ { + "contentId" : "3324826", + "userName" : "Karikalan Selvaraj", + "rankPoints" : "13870", + "rankName" : "Genius", + "date" : "Apr 22, 2020 7:20 PM", + "userId" : "1601212", + "content" : "Hi LM5050 can not be used to drive two back-back NMOS due to the gate drive. Because, MOSFET is turned off by connecting Gate to IN. For the first MOSFET, this means Gate-Drain is short, so this MOSFET will not be turned off. We recommend to use LM5060 along with LM5050 or LM74700. Regards, Kari." + } ], + "tags" : [ "/support/power-management/f/196/tags/LM5050_2D00_1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899300.json b/data/json/DLP/899300.json new file mode 100644 index 0000000000000000000000000000000000000000..45abacc98ed8f37dd9a59b2dd00dc36e54c11ab4 --- /dev/null +++ b/data/json/DLP/899300.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899300", + "reporterName" : "Jordan Berke", + "rankPoints" : "65", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LDC1614: Using multiple coils to remove external interference", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 32", + "queryText" : "Part Number: LDC1614 My LDC1614 implementation uses three coils to sense a single target. Since we have multiple coils, we can compare them to remove ambient interference. I'm wondering if there is a best practice approach for this, as I can see drawbacks in the methods that we're currently using. I'm attaching pictures pre and post-filtering. Graph 1: Graph 2: Here are my questions: 1. Is this an expected amount of interference? I've done extensive prototyping on the EVM and I never saw as much as I'm seeing in graph 1. The EVM essentially looked exactly like graph 2 without special settings or math. That makes me think there's some functionality on the LDC side that I'm unfamiliar with, that is already filtering some or all of this interference. 2. If there is no internal interference subtraction with reference coils, is there a best practice approach to this? If we use LDC1 as a baseline and do a diff, we're essentially operating such that the system is at most as reliable as LDC1. If we do the following: LDC1filtered = LDC1raw - LDC2raw LDC2filtered = LDC2raw - LDC3raw LDC3filtered = LDC3raw - LDC1raw Each sensor is only taking advantage of one reference sensor at any time. In both calculations, as the target approaches any one coil, that signal will be subtracted from the other coils as well. That's the source of the big difference in the shape of each of these curves between graphs.", + "partNumber" : " LDC1614", + "allResponseList" : [ { + "contentId" : "3324984", + "userName" : "Kristin Jones93", + "rankPoints" : "15785", + "rankName" : "Genius", + "date" : "Apr 22, 2020 11:26 PM", + "userId" : "4996845", + "content" : "Hi Jordan, It would help me answer your questions if I had some additional information about your setup: Are all of your coils the same size? Are they they same distance from the target? What is the target? How does it move in relation to the coils? Are you using the internal oscillator or an external oscillator? Are you trying to sense the absolute position of the target? General information about your application would also be helpful. Best Regards," + }, { + "contentId" : "3327485", + "userName" : "Jordan Berke", + "rankPoints" : "65", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 7:28 PM", + "userId" : "4649027", + "content" : "Hi Kristin, thanks for your reply. I sent you a DM with some specifics but I'll put the general answers here. 1. Yes, all 10mm 4 layer coils. The target moves closer and further from each of the coils as its position moves. Almost like triangulation. 2. The target moves at an angle closer and further from the coils. 3. Internal 4. Trying to sense the angle of the target, so essentially yes the position of the centroid of where the target interacts with the inductive field. But more generally, we're seeing a very clear noise signal that impacts all coils the same. You can see essentially each peak in the graphs above are shared between all signals. That's why when we do a simple diff, we get such clean signal. What I'm trying to figure out is: 1. How should I go about diagnosing the source of this noise? Where would you personally begin? My coils are relatively simple, and do not result in this interference pattern when connected to the EVM. The noise exists when the target is stationary. 2. What methodologies can be used in firmware to remove noise that is so clearly impacting all sensors? It all seems like very low frequency noise, so I'm not sure if we can identify and remove similar frequencies." + }, { + "contentId" : "3327550", + "userName" : "Kristin Jones93", + "rankPoints" : "15785", + "rankName" : "Genius", + "date" : "Apr 24, 2020 9:11 PM", + "userId" : "4996845", + "content" : "Hi Jordan, Thanks for providing the requested information. I'll respond to your private message as well. I think the biggest source of your noise is the internal oscillator. We use an external oscillator on the EVM that has less jitter, and we recommend that all precision applications use an external oscillator. The noise in your first measurement looks fairly typical of the internal oscillator, which is why I asked about it. If you have a footprint available for an external oscillator, I suggest populating it. If not, I suggest continuing your testing with the EVM until you can create another iteration of your board. The best way to remove this noise is to use an external oscillator. If you need to remove noise due to changing temperature as well, I suggest using a ratiometric approach instead of a differential approach with your reference sensor. Instead of LDC1filtered = LDC1 - LDC2 you would use LDC1filtered = LDC1/LDC2 Best Regards," + } ], + "tags" : [ "/support/sensors/f/1023/tags/LDC1614" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899303.json b/data/json/DLP/899303.json new file mode 100644 index 0000000000000000000000000000000000000000..5b1b1efd687297fb9d947d3347a494ddca6bb503 --- /dev/null +++ b/data/json/DLP/899303.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899303", + "reporterName" : "Adrian Ymeraj", + "rankPoints" : "3490", + "resolutionStatus" : "Resolved", + "ticketName" : "FET with dual side cooling", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 18", + "queryText" : "Hi team, do we have any Mosfet 60V (N-Channel) dual side cooling con Rds(on) <1mOhm, like the ones from VISHAY? Thank you and best regards, Adrian", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3324808", + "userName" : "John Wallace1", + "rankPoints" : "9460", + "rankName" : "Genius", + "date" : "Apr 22, 2020 6:53 PM", + "userId" : "3502056", + "content" : "Hi Adrian, Thanks for the inquiry. The only dual cool partscompany offers are the CSD88584Q5DC and CSD88559Q5DC power blocks. We previously EOL'd all of our discrete FETs in dual cool packages." + } ], + "tags" : [ ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899315.json b/data/json/DLP/899315.json new file mode 100644 index 0000000000000000000000000000000000000000..173febeb0d0a68c4647622771610840cba50f2dc --- /dev/null +++ b/data/json/DLP/899315.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899315", + "reporterName" : "Michael T Schneider", + "rankPoints" : "2255", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS7A88-Q1: foldback current limit profile", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 17", + "queryText" : "Part Number: TPS7A88-Q1 Team, I am working with the TPS7A88-q1. I was wondering if you could help me get some information on the foldback current limit profile. Is there some kind of equation or method that we could use to estimate the output current limit as a function of output voltage? Thanks!", + "partNumber" : " TPS7A88-Q1", + "allResponseList" : [ { + "contentId" : "3324953", + "userName" : "Kyle Van Renterghem", + "rankPoints" : "4860", + "rankName" : "Expert", + "date" : "Apr 22, 2020 10:23 PM", + "userId" : "1091764", + "content" : "Hi Michael, I don't have an equation for you but below is a graph showing the current the LDO provides when a certain percentage of the nominal output voltage is forced on the output pin. In case it is helpful, I've also attached the data used to create that graph. TPS7A88 Foldback Current Limit Data.xlsx" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS7A88_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899319.json b/data/json/DLP/899319.json new file mode 100644 index 0000000000000000000000000000000000000000..2bbe66bddc90a65e895151de8aae188d57a7406e --- /dev/null +++ b/data/json/DLP/899319.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899319", + "reporterName" : "Jim Albert", + "rankPoints" : "240", + "resolutionStatus" : "Resolved", + "ticketName" : "UCC28600: Can Pin1 Soft Start be used to shut the device off?", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 13", + "queryText" : "Part Number: UCC28600 As the title suggests my question is; Can I use the Soft Start, pin 1, to turn the UCC28600 controller on and off? It works on the bench but wonder if this is OK to do or will there be a problem doing this? My intention is to use a switch on the secondary side then opto-isolate the switch to the primary side to pull pin 1 low. In this way I can turn the power supply on and off with the mains voltage still applied. Thanks for your help.", + "partNumber" : " UCC28600", + "allResponseList" : [ { + "contentId" : "3324910", + "userName" : "Eric Faraci", + "rankPoints" : "7685", + "rankName" : "Expert", + "date" : "Apr 22, 2020 9:07 PM", + "userId" : "3729643", + "content" : "Jim Yes you can. There is no concern fromcompany about having you pull SS pin to GND to disable operation as you have done. Best Regards, Eric" + }, { + "contentId" : "3324921", + "userName" : "Jim Albert", + "rankPoints" : "240", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 9:24 PM", + "userId" : "1594745", + "content" : "Eric, Thank you for confirming this. Best, Jim" + } ], + "tags" : [ "/support/power-management/f/196/tags/Soft%2bStart", "/support/power-management/f/196/tags/Flyback", "/support/power-management/f/196/tags/UCC28600", "/support/power-management/f/196/tags/Controller" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899320.json b/data/json/DLP/899320.json new file mode 100644 index 0000000000000000000000000000000000000000..3bb68976b0ef3d0f679e04772e37c52891715005 --- /dev/null +++ b/data/json/DLP/899320.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899320", + "reporterName" : "Franco Giangregorio1", + "rankPoints" : "10", + "resolutionStatus" : "", + "ticketName" : "TPS650250: Any known input vulnerabilities ?", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 13", + "queryText" : "Part Number: TPS650250 Dear TI, we are using TPS650250RHBT to power a AM3352-based design, very similar to the BeagleBone. We are experiencing about a 10% failure rate in the field, where the TPS650250 dies / fails to start up / regulate - its switching output(s) stay around 0.8V - the LDO outputs make 1V8 correctly. The TPS650250RHBT is fed by 5V from a LM22670MR-5.0 circuit. Are there any know issues, such as input spikes below 0V or other transient effects that might damage regulator? Why are one or more of the switching outputs affected? (usually only one of the 3 switching outputs is damaged, in our case, it is the output configured for 3V3). Can you advise what to investigate? I look forward to your reply. Thank you. Franco", + "partNumber" : " TPS650250", + "allResponseList" : [ { + "contentId" : "3325748", + "userName" : "Brian Berner", + "rankPoints" : "26215", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 2:41 PM", + "userId" : "1859421", + "content" : "Franco, Which BeagleBone are you using? The BeagleBone Black (BEAGLEBK) uses the TPS65217 PMIC. I was not aware of a BeagleBone that is using the TPS650250, but I know there are other reference designs using TPS650250 to power AM335x. Either way, if you are having issues please provide the following: Schematic (searchable PDF, not a JPG image) Oscilloscope captures showing the issue occurring We cannot debug an issue based solely on the description of an issue." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS650250" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899323.json b/data/json/DLP/899323.json new file mode 100644 index 0000000000000000000000000000000000000000..1cef0fba1b521eebbdd1b61776cde6243af35fcb --- /dev/null +++ b/data/json/DLP/899323.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899323", + "reporterName" : "Zhihan Zhang", + "rankPoints" : "170", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ40Z50-R2: BQ40Z50-R2 Sample Rate", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 23", + "queryText" : "Part Number: BQ40Z50-R2 Hicompany team, I have couple questions about measurement for BQ40Z50-R2. For example, I have a pulse discharge with 15mA of 1s, 100mA of 0.1s, 150mA of 0.2s, and 200mA of 0.7s. The total period is 2s. Will the IC be able to measure every peak of the discharge current per period for current measurement? With such discharge rate, will the fuel gauge be able to account all peaks per period for capacity measurement? Or will the fuel gauge accuracy be decreased for such discharge? Thanks in advance! Best Regards, Zhihan", + "partNumber" : " BQ40Z50-R2", + "allResponseList" : [ { + "contentId" : "3325956", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 4:22 PM", + "userId" : "1864278", + "content" : "I have assigned your question to my colleague and we will get back to you. Andy" + }, { + "contentId" : "3327606", + "userName" : "Eric Vos24", + "rankPoints" : "3585", + "rankName" : "Expert", + "date" : "Apr 24, 2020 9:59 PM", + "userId" : "3440231", + "content" : "Zhihan, Does this load profile repeat continuously? The issue will be getting resistance updates if this is a pulse and rest for a long time. For resistance to update you need to be in discharge mode for an extended time. The gauge will capture all of the charge from this pulse, so your passed charge will be accurate. thanks, Eric Vos" + }, { + "contentId" : "3327646", + "userName" : "Zhihan Zhang", + "rankPoints" : "170", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 10:39 PM", + "userId" : "6031918", + "content" : "Hi Eric, Thank you for your help! Yes, the load will be repeated every 2s until fully discharged. So regardless the resistance, the fuel gauge will just account every peak right? The resistance here you mean the resistance of the cell right? Another question is what if I lower the dsg threshold to force to stay in discharge mode, what may be the good or bad impacts for the fuel gauge? Thanks again, Zhihan" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ40Z50_2D00_R2" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899326.json b/data/json/DLP/899326.json new file mode 100644 index 0000000000000000000000000000000000000000..fc96e512339068a3e1a88c9d7bef49421a49fabe --- /dev/null +++ b/data/json/DLP/899326.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899326", + "reporterName" : "Alan Rosenberg", + "rankPoints" : "10", + "resolutionStatus" : "", + "ticketName" : "LM2577: LM2577S-ADJ/NOPB", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 24", + "queryText" : "Part Number: LM2577 Hi, We are noticing a discoloration of the exposed metal only on this particular part after Reflow soldering. This is evident in the picture below when comparing the lead color to that of other components. There is no issue with the solder wetting to the component leads. We have confirmed that the peak temperature reached during reflow is 224c. First we want to make sure that the actual component markings on the parts properly correlate to the different part number markings on the bag label and that we do have the correct parts and that they are RoHS. Second we would like to know if we need to be concerned about the discoloration or can ignore it? We are using a lead free SAC305 water soluble flux type solder paste.", + "partNumber" : " LM2577", + "allResponseList" : [ { + "contentId" : "3326344", + "userName" : "Richard Fu22", + "rankPoints" : "2925", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 10:37 PM", + "userId" : "5003147", + "content" : "Hi Alan, Let me talk to our product engineer and I will get back to you. Thanks, Richard" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM2577" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899334.json b/data/json/DLP/899334.json new file mode 100644 index 0000000000000000000000000000000000000000..d746a628884b5ba916b1af4ac35777f3ffbef524 --- /dev/null +++ b/data/json/DLP/899334.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899334", + "reporterName" : "Nathan Gartner", + "rankPoints" : "30", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS2511EVM-141: Snubber Circuit to reduce EMI", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: TPS2511EVM-141 I utilized the TPS2511EVM-141 components and layout in a design with a BLE connected device and the Circuit is failing radio emissions testing due to EMI created by the switching regulator, TPS54240. On the EVM board there is a flyback diode, D3. In other designs I have seen a snubber circuit utilized in parallel with this diode to minimize any ringing that may occour. I would like to know if there are any recommendations for values of a capacitor and resistor series to go in parallel with D3 as a snubber circuit for use with the components and respective values in on the EVM board that will effectively reduce ringing on the output of the TPS54240 and minimize EMI. See attached Data sheet, schematic on PG 4. Thank youTPS2511EVM-141.userGuide.pdf", + "partNumber" : " TPS2511EVM-141", + "allResponseList" : [ { + "contentId" : "3325607", + "userName" : "Adam Mc Gaffin", + "rankPoints" : "13080", + "rankName" : "Genius", + "date" : "Apr 23, 2020 12:53 PM", + "userId" : "4996939", + "content" : "Hello, D3 on the EVM is a Schottky diode, and on this system, it is used to prevent the possibility of large ground currents into the TPS2511 during sudden disconnects due to inductive effects in a cable. I do not have any recommendations for a snubber circuit to help with EMI as the TPS2511 is just a load switch and not designed to reduce EMI from upstream devices. I recommend reaching out to the TPS54240 team to see if they have any recommendations on a filter or how to make the output of the TPS54240 more stable. Post a new question, but put the TPS54240 as the part in question. This will assign it to the proper team." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS2511EVM_2D00_141", "/support/power-management/f/196/tags/BLE", "/support/power-management/f/196/tags/snubber%2bcircuit", "/support/power-management/f/196/tags/EMI", "/support/power-management/f/196/tags/Switch%2bMode%2bPower%2bSupply", "/support/power-management/f/196/tags/TPS54240" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899337.json b/data/json/DLP/899337.json new file mode 100644 index 0000000000000000000000000000000000000000..9fe39928d88f72ad92ae5f55a1dc21bba3fee640 --- /dev/null +++ b/data/json/DLP/899337.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899337", + "reporterName" : "CharliePE", + "rankPoints" : "195", + "resolutionStatus" : "Resolved", + "ticketName" : "UCC21710-Q1: How to connect OC for desaturation and CLMPI for active miller clamp when BJT current buffer is used", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 21", + "queryText" : "Part Number: UCC21710-Q1 Hi, When the BJT current buffer (shown on page 46 of the datasheet of UCC21710-Q1 and the E2E post /.../798930 is used to increase the driving current capacity, how should the two pins OC and CLMPI be connected to accomplish desaturation and active miller clamp? Should we still use the circuit shown on page 41 of the datasheet to connect pin OC for desaturation, and directly link the gate of the MOSFET (the actual switching component being driven by the BJT current buffer) to CLMPI pin for active miller clamp? Also the post for soft-turn-off circuit in the E2E post shown above is no longer available. Can you show details of how to design the soft-turn-off with a resistor and capacitor between the base of the transistor and VEE? Thanks.", + "partNumber" : " UCC21710-Q1", + "allResponseList" : [ { + "contentId" : "3324852", + "userName" : "Audrey Dearien7", + "rankPoints" : "4345", + "rankName" : "Expert", + "date" : "Apr 22, 2020 7:52 PM", + "userId" : "5003116", + "content" : "Hello, Yes, both functions are implemented with the same connection as given in the datasheet. The buffer only presents some difference in the STO circuitry because the buffer is driven with OUTL (instead of OUTL directly connected to the MOSFET gate), thus OUTL cannot control the STO current successfully unless there are some added components. The Miller clamp pin, CLMPI, must still be directly connected to the gate of the MOSFET in order to provide a low-impedance path to VEE in order to prevent false turn-on. The DESAT circuit with OC pin is also same as shown in the datasheet. Please see the datasheet section entitled \"Higher Output Current Using an External Current Buffer\" for choosing the R and C value for controlling STO when using an external BJT buffer. Additionally, see the XL Calculator tool here that also has a sheet for calculating the R/C values for STO with Buffer and the resistors for DESAT circuit using the OC protection. Regards, Audrey Please click the green button if I answered your questions!" + }, { + "contentId" : "3324906", + "userName" : "CharliePE", + "rankPoints" : "195", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 9:02 PM", + "userId" : "4474492", + "content" : "Hi Audrey, Thank you very much for providing insightful, accurate, and prompt reply. Your help is highly appreciated. Have a great day, Guanghui" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC21710_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899340.json b/data/json/DLP/899340.json new file mode 100644 index 0000000000000000000000000000000000000000..f2a36c9c8ec5a64ee60c54a195dd1b9ad95fc782 --- /dev/null +++ b/data/json/DLP/899340.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899340", + "reporterName" : "Kannan Sockalingam", + "rankPoints" : "270", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS794: TPS79433DCQR operating temp range?", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 15", + "queryText" : "Part Number: TPS794 Hi team, what is the operating temp range of this device? The Electrical Characteristics table says \"Over Recommended operating temp range (Tj=-40C to 125C)\" but the orderable tables at the end of the datasheet says Op Temp ('C) of -40C to 85C. Is it 85C or 125C at the top end?", + "partNumber" : " TPS794", + "allResponseList" : [ { + "contentId" : "3324971", + "userName" : "Jason Song", + "rankPoints" : "12645", + "rankName" : "Genius", + "date" : "Apr 22, 2020 10:58 PM", + "userId" : "1505435", + "content" : "Hi Kannan, Thanks for pointing this out, as the part EC table has data up to 125C, I would use 125C for the top end. The orderable tables are wrong. Regards, Jason Song" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS794" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899341.json b/data/json/DLP/899341.json new file mode 100644 index 0000000000000000000000000000000000000000..6d15bcda323797a990b45ed8c06e2f281ff76ecc --- /dev/null +++ b/data/json/DLP/899341.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899341", + "reporterName" : "Dave Young", + "rankPoints" : "370", + "resolutionStatus" : "", + "ticketName" : "TPS63802: Current-Feedback buck-boost converter", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 17", + "queryText" : "Part Number: TPS63802 Hi There- I'm working on a circuit which can charge a 1-cell LiIon battery (2.5-4.2V) from a primary battery (configuration TBD, ranging from 0.8V - 3.8V). I'm planning on using a buck-boost TPS63802 as the power converter. Instead of being a voltage-regulated output, I would like to have the circuit be current-regulated to deliver 150mA of current whenever enabled. I have designed a current-sense resistor (R28) which is amplified by a non-inverting op amp (U7) to deliver a feedback signal to the TPS63802 (U6). The parts are on the way for prototyping. But I was hoping someone would have some time to review the attached schematic. I'm particularly concerned about the control system and making sure everything is stable. Thanks so much!", + "partNumber" : " TPS63802", + "allResponseList" : [ { + "contentId" : "3325476", + "userName" : "Milos", + "rankPoints" : "7260", + "rankName" : "Expert", + "date" : "Apr 23, 2020 10:19 AM", + "userId" : "5692358", + "content" : "Hi Dave, Thanks for reaching out. In principle this should work as a constant current source. I would suggest reducing C?, to 10n or so, and make sure your opamp inputs can go down to ground. However... I strongly recommend using a proper battery charger IC for several reasons: A charger IC will terminate the charging precisely at 4.2 V. In the above circuit there is no voltage limiting. You will overcharge and damage the battery, and most likely something or someone else as well. A charger IC performs a proper CC/CV charging, with a precharge cycle if the battery is empty. Charging an empty battery with the nominal charge current can damage the battery. A charger IC will have some additional safety features, such as a charge timer, input for temperature measurement etc. Best regards, Milos" + } ], + "tags" : [ "/support/power-management/f/196/tags/buck_2D00_boost", "/support/power-management/f/196/tags/current%2bfeedback", "/support/power-management/f/196/tags/TPS63802" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899344.json b/data/json/DLP/899344.json new file mode 100644 index 0000000000000000000000000000000000000000..fbe3fdad67be55fe39471bca4d1a710689f2079b --- /dev/null +++ b/data/json/DLP/899344.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899344", + "reporterName" : "Abhishek singh", + "rankPoints" : "1040", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LMT70A: Suggestion for temeperature monitoring wearable band", + "rankName" : "Expert", + "replies" : " 2", + "views" : " 26", + "queryText" : "Part Number: LMT70A Hi Team We are making a wearable band withing the range of +-0.1 degree centigrade to measure body temperature by sensing temperature on wrist. 1) Doescompany has any design for same/ Similar application? 2) Please suggest which part we should proceed as we have to make very cheap band 3) We are thinking of mounting a metal part/ thick pogo pin on bottom side PCB in such a manner that it come out of mechanical surface and tough skin. Do you have any suggestion for such part ? Doescompany used any such part off the shelf part in there internal testing while making probe of any wearable heart rate monitor/ECG, if so please suggest part no 4) while going through /lit/an/snia021b/snia021b.pdf on page no 4 it is mentioned that \"Better results can be obtained if underfill material is added surrounding the LMT70 die (package) as shown in Figure 4.\" Can you please tell any example of material which can be used ? 5) We have one concern that suppose user didn't tied his wearable we may not able to measure temp properly . Do you have any suggestion how we can give notification that probe not properly touching hand ? we are thinking of proximity sensor( not sure about sensitivity) and SPO2 sensor (disadvantage is high current consumption and cost ). 6) How sweat under the probe can impact temperature measurement. Consider use case person is in 40 degree ambient and we need to measure temperature every 30 min.", + "partNumber" : " LMT70A", + "allResponseList" : [ { + "contentId" : "3324958", + "userName" : "David Vaseliou", + "rankPoints" : "4830", + "rankName" : "Expert", + "date" : "Apr 22, 2020 10:31 PM", + "userId" : "4910861", + "content" : "Hi Abhishek, Below is my feedback. 1) Doescompany has any design for same/ Similar application? Please see this FAQ for design information on this topic. /.../895494 2) Please suggest which part we should proceed as we have to make very cheap band For 0.1 °C applications I would suggest either TMP117 or LMT70. 3) We are thinking of mounting a metal part/ thick pogo pin on bottom side PCB in such a manner that it come out of mechanical surface and tough skin. Do you have any suggestion for such part ? Doescompany used any such part off the shelf part in there internal testing while making probe of any wearable heart rate monitor/ECG, if so please suggest part no Please see these reference designs for reference: 4) while going through /.../snia021b.pdf on page no 4 it is mentioned that \"Better results can be obtained if underfill material is added surrounding the LMT70 die (package) as shown in Figure 4.\" Can you please tell any example of material which can be used ? Let me check to see what underfill material was used in that app note. 5) We have one concern that suppose user didn't tied his wearable we may not able to measure temp properly . Do you have any suggestion how we can give notification that probe not properly touching hand ? we are thinking of proximity sensor( not sure about sensitivity) and SPO2 sensor (disadvantage is high current consumption and cost ). You could try usingcompany CapTIvate technologies for low power contact detection: 6) How sweat under the probe can impact temperature measurement. Consider use case person is in 40 degree ambient and we need to measure temperature every 30 min. Sweat will have a different thermal conductivity than your skin, but as long as there is a good thermal path from the wrist to the temperature sensor and the temperature sensor is not exposed to sweat directly there shouldn't be any concerns." + }, { + "contentId" : "3327021", + "userName" : "David Vaseliou", + "rankPoints" : "4830", + "rankName" : "Expert", + "date" : "Apr 24, 2020 1:03 PM", + "userId" : "4910861", + "content" : "Hi Abhishek, As for the underfill, E1216M is a common underfill material that is used in assembly houses. Thanks, David" + } ], + "tags" : [ "/support/sensors/f/1023/tags/LMT70A", "/support/sensors/f/1023/tags/LMT70" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899346.json b/data/json/DLP/899346.json new file mode 100644 index 0000000000000000000000000000000000000000..2e58fee70821371d657c793516614a01da31e39f --- /dev/null +++ b/data/json/DLP/899346.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899346", + "reporterName" : "Maker Marc", + "rankPoints" : "10", + "resolutionStatus" : "", + "ticketName" : "BQ40Z50-R1: Is there a way to detect mains power is connected when not charging?", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 9", + "queryText" : "Part Number: BQ40Z50-R1 Hi Folks, I am already able to detect if a device is charging, but is there a method to detect a device is connected to external power but not charging? Some examples: Battery is 100% charged, and connected to an external power source. Battery is <100% charged, and connected to external power, but not charging. Thanks for your suggestions.", + "partNumber" : " BQ40Z50-R1", + "allResponseList" : [ { + "contentId" : "3324944", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 22, 2020 10:11 PM", + "userId" : "1864278", + "content" : "You can check the OperationStatus()[XCHG] bit, ChargingCurrent() and ChargingVoltage(). 100% RSOC usually occurs when a valid charge termination is detected and then the CHG FET turns off. OperationStatus()[XCHG] will be set to 1, which means charging is disabled. Both ChargingCurrent() and ChargingVoltage() should return 0. Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/charging", "/support/power-management/f/196/tags/bq40z50_2D00_r1", "/support/power-management/f/196/tags/external%2bpower", "/support/power-management/f/196/tags/mains%2bpower", "/support/power-management/f/196/tags/charger" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899353.json b/data/json/DLP/899353.json new file mode 100644 index 0000000000000000000000000000000000000000..dea5b4823090930c60e8decb098fac0bf88fdf07 --- /dev/null +++ b/data/json/DLP/899353.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899353", + "reporterName" : "Michael Black2", + "rankPoints" : "80", + "resolutionStatus" : "Resolved", + "ticketName" : "UCC28600: Flyback Transformer Help", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 15", + "queryText" : "Part Number: UCC28600 Hello, I am designing a flyback converter with a 19V, 5A output, and I am having some trouble finding a transformer for my application. I am pretty sure I will have to essentially make my own transformer custom transformer, but I am not sure where to begin with that. Below are some parameters that I think are relevant. Voltage on the primary side - 170VDC (literally just rectified 120VAC) Peak current on the primary side - 3.8A (based on an 80KHz switching frequency, and a primary inductance of 155uH) Np:Ns - 13:1 (primary : secondary winding ratio) Np:Naux 26:1 (primary : auxiliary winding ratio) I am just looking for some resources that will help me get what I need to make this transformer. Best,", + "partNumber" : " UCC28600", + "allResponseList" : [ { + "contentId" : "3324903", + "userName" : "Eric Faraci", + "rankPoints" : "7685", + "rankName" : "Expert", + "date" : "Apr 22, 2020 8:59 PM", + "userId" : "3729643", + "content" : "Michael Typically for AC/DC designs that use a flyback converter the transformer is a custom design for the specific application. As a result, many magnetic vendors, such as Wurth or Renco, can quickly build a transformer based on few key electrical parameters for your design. I recommend reaching out to these vendors to confirm what exactly they need, but in general they require max operating frequency, desired inductance, input voltage range, output voltage (including auxiliary to power UCC28600), output current on each output and isolation rating. If you have not already, we recommend that you use our excel design calculator /lit/zip/slvc104 to determine the circuit parameters that the magnetics vendor needs to start their design. Best Regards, Eric" + }, { + "contentId" : "3324920", + "userName" : "Michael Black2", + "rankPoints" : "80", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 9:23 PM", + "userId" : "6240994", + "content" : "Hey Eric, Thank you so much, this is exactly what I needed!" + } ], + "tags" : [ "/support/power-management/f/196/tags/Transformer", "/support/power-management/f/196/tags/UCC28600" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899355.json b/data/json/DLP/899355.json new file mode 100644 index 0000000000000000000000000000000000000000..44ae45ee6ca3b796f378ae86177dcc175a3d7493 --- /dev/null +++ b/data/json/DLP/899355.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899355", + "reporterName" : "Sara Jia", + "rankPoints" : "2835", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS23753A: if TPS23753A supports non-isolated application?", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 8", + "queryText" : "Part Number: TPS23753A HI team, if TPS23753A supports non-isolated application asTPS23750 , I have not found in datasheet. Thanks. BR Sara", + "partNumber" : " TPS23753A", + "allResponseList" : [ { + "contentId" : "3324898", + "userName" : "Brett Colteaux", + "rankPoints" : "1795", + "rankName" : "Intellectual", + "date" : "Apr 22, 2020 8:53 PM", + "userId" : "4406190", + "content" : "Hi Sara, Thank you for your question. Yes, the TPS23753A can be used in non-isolated applications. You can take a look at our PM40355 reference design which uses the TPS23753A in a class 3 non-isolated design: /tool/PMP40355 If you would like to provide the system level specifications for this design (output voltage/current, key care abouts: size, cost, efficiency, etc.) than I may be able to help recommend a reference design to meet your system level needs. Please let me know if you have any questions. Thank you! Best Regards, Brett Colteaux PoE Product Marketing Engineer" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS23753A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899365.json b/data/json/DLP/899365.json new file mode 100644 index 0000000000000000000000000000000000000000..8ec2d425421efcae3832922da89d6105d2a062ca --- /dev/null +++ b/data/json/DLP/899365.json @@ -0,0 +1,71 @@ +{ + "ticketNumber" : "899365", + "reporterName" : "Wayne Eckertson", + "rankPoints" : "160", + "resolutionStatus" : "", + "ticketName" : "TPS27S100: Circuit Breaker Mode", + "rankName" : "Prodigy", + "replies" : " 7", + "views" : " 35", + "queryText" : "Part Number: TPS27S100 The training video imaged below talks about two modes of operation for TI's High Side Switches at minute 15:00. What is used to enable the Circuit Breaker mode in the TPS27S100? It appears that this would be able to catch a short circuit condition in ~20us. My circuit is shutting down in 170us when I am using the external current limiter resistor and ~160 us with the internal current limiter (ILIM pin tied to ground). With my external currently limiter set to 820-ohm for 3A, I am seeing a 3.3A square pulse. With the internal current limiter I am seeing a square pulse of 9A. Wayne", + "partNumber" : " TPS27S100", + "allResponseList" : [ { + "contentId" : "3324969", + "userName" : "Timothy Logan", + "rankPoints" : "5600", + "rankName" : "Expert", + "date" : "Apr 22, 2020 10:55 PM", + "userId" : "1849899", + "content" : "Hello Wayne, It appears that the image you are linking to is broken. Do you have a hard link? The square pulses you are seeing sounds like thermal shutdown is happening, the device cools off, and then the device turns on again (causing a square wave). The values seem a little strange though as during thermal shutdown with the external current limit the current should be clamped to 50% of the set value and for the internal current limit mode it should be set to 5A. Do you have a schematic of how the TPS27S100 is connected or a scope shot of the signals?" + }, { + "contentId" : "3324989", + "userName" : "Wayne Eckertson", + "rankPoints" : "160", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 11:39 PM", + "userId" : "4657062", + "content" : "I can't find a hard link to the video but it is located in the /product/TPS27S100/support Here are some schematic sections. Wayne" + }, { + "contentId" : "3324993", + "userName" : "Wayne Eckertson", + "rankPoints" : "160", + "rankName" : "Prodigy", + "date" : "Apr 22, 2020 11:47 PM", + "userId" : "4657062", + "content" : "The web editor did not like my last post; it cut out most of my text and one image. In case you can not see the previous post's image of the video, the name of the video is \"Industrial Smart High Side Switch Solutions\". The scope shot in the prior post is of the internal limit (Ilim grounded). Output is connected to a solenoid. The scope shot below shows the 3A external limit and the input voltage on the input. The rest of my system can not handle the 3.3A spike and is in the process of shutting down. Output is connected to a solenoid. Wayne" + }, { + "contentId" : "3325944", + "userName" : "Timothy Logan", + "rankPoints" : "5600", + "rankName" : "Expert", + "date" : "Apr 23, 2020 4:16 PM", + "userId" : "1849899", + "content" : "Hello Wayne, I see the scope shot. Essentially what I thought was happening was that the TPS27S100 was going into thermal shutdown mode. At 3.3A though this shouldn't be the case as even if this was DC operation (and not ~150uS like you're seeing) the junction temperature should only heat up 77.19C above ambient (and unless you are running in a heat chamber this probably won't reach the 150C max junction temperature). Is it possible the 3.3A vs. 3.0A is causing the upstream power to turn off? The 3.3A current limit for a 3.0A current limit is within the accuracy range. At that current range (Ilimit ≥ 1.6 A, -40°C < TJ < 25°C) you are looking at a +/- 18% accuracy range for the current limit plus whatever tolerance you have on your resistor. The common strategy here is to look at the worst case current limit after the accuracy spec and the resistor tolerance and design with that current limit. What is the nominal current limit for your application? What is the inductance value on your solenoid? I'll take a look at the training video and get back to you shortly." + }, { + "contentId" : "3326079", + "userName" : "Wayne Eckertson", + "rankPoints" : "160", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 5:48 PM", + "userId" : "4657062", + "content" : "There were two posts I made yesterday; one at 11:39 and another at 11:47. Is sounds like you only saw the 11:47. The 11:39 post has second o-scope shot and two schematic snippits. My solenoid has a resistance of 14-ohms +/-10% and an inductance of 10mH. I am seeing 2.53A during normal operation of my solenoid and 2.80A at worst case. Worst case is implemented by paralleling 162-ohm with the solenoid to get to the -10%. I agree that the upstream power supplies are shutting down with the 3.3A pulse. Due to the wording of the datasheet, I was expecting the TPS27S100 to detect the short condition in less than 1us. Page 17 of the datasheet states \"The fast-trip response time is less than 1 μs, typically.\" I did not expect the external current limit to come into play with with a short circuit event. Therefore, I have not designed my upstream power supplies to handle that amount of current. I was hoping that the circuit breaker mode discussed in the training video would get me closer to the 1us time. My power supplies should be able to handle a current spike in the tens of microseconds. But if the TPS27S100 needs to deal with hundreds of microseconds, I will be forced to beef up my power supplies." + }, { + "contentId" : "3327601", + "userName" : "Timothy Logan", + "rankPoints" : "5600", + "rankName" : "Expert", + "date" : "Apr 24, 2020 9:56 PM", + "userId" : "1849899", + "content" : "Wayne, Have you tried to measure the short circuit latency when the device is already on and then a short occurs? This is what the 1uS time spec'ed in the datasheet is referring to. When the EN pin is asserted there is an inherent turn-on delay time associated with the device (specified as td(on) in the datasheet). What you are seeing is essentially the delay time coupled together with the time it takes the diagnostics to settle in the device." + }, { + "contentId" : "3327648", + "userName" : "Wayne Eckertson", + "rankPoints" : "160", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 10:40 PM", + "userId" : "4657062", + "content" : "I have not measured the response time of a short circuit when the driver it turned on. That is not a fault condition that concerns us and I don't have a safe way (spark free way) of implementing that test. Were you able to get the details on the circuit breaker mode? Does the TPS27S100 support it?" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS27S100" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899371.json b/data/json/DLP/899371.json new file mode 100644 index 0000000000000000000000000000000000000000..5c327f0ecf0afc79acb0d90c6d64288edc429581 --- /dev/null +++ b/data/json/DLP/899371.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899371", + "reporterName" : "Alex Fields", + "rankPoints" : "60", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ24707A: IFAULT not tripping when conditions met", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 16", + "queryText" : "Part Number: BQ24707A My Ifault pin is pulled up through a 100k resistor to 3.3V. When I apply a dummy load of 3A from ACN to GND, well above the 128mA input current limit of the 0x3f register (by setting 0x3f to 0x0100. nothing causes a trip. is there something wrong with my setyup? here are my registers in format: register: High byte, low byte 0x12: 0x19, 0x04 0x14: 0x08, 0x00 0x15: 0x32, 0x00 0x3f: 0x01, 0x00 because of these register values, acoc should be enabled. I draw 1amp of current, way above 2x the limit of acoc, and the ifault doesn't trip. I've also noticed that the outside pin is exactly correct when charge current is chosen (200mV @ 1A), but the iout pin is wildly inaccurate when input current is chosen (75mV @ 1A charging). this doesnt make sense because the input current is the charging current plus what it takes to run the ic. I've verified we are using a 10m resistor between acn and acp.", + "partNumber" : " BQ24707A", + "allResponseList" : [ { + "contentId" : "3325821", + "userName" : "Angelo Zhang87", + "rankPoints" : "6530", + "rankName" : "Expert", + "date" : "Apr 23, 2020 3:17 PM", + "userId" : "5346700", + "content" : "Hi Alex, Thanks for the information! To keep the forum organized, I have replied to your original thread and will continue the discussion there: /support/power-management/f/196/t/897804 Best regards, Angelo" + } ], + "tags" : [ "/support/power-management/f/196/tags/bq24707a" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899373.json b/data/json/DLP/899373.json new file mode 100644 index 0000000000000000000000000000000000000000..58f6884f3a3be1437c94ef4b58bc413afce52d7b --- /dev/null +++ b/data/json/DLP/899373.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899373", + "reporterName" : "Gregg Haensgen", + "rankPoints" : "40", + "resolutionStatus" : "", + "ticketName" : "BQ51013B: Qi parts listing", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 16", + "queryText" : "Part Number: BQ51013B Where can a person find a good parametric comparison of all your Qi parts? I've yet to be able to find anything that easily lists them by themselves and as I research your options more I keep running into new part numbers that support Qi. I'd like to see all the options so I can make sure I pick the right part. For example, what options are there out there for adjustable or output voltages of less than 5V? I'd recommend a separate category for wireless power/qi to make this easier unless I'm just missing it completely. I'm hoping to move forward on a design quickly so would appreciate anything to show me all the options.", + "partNumber" : " BQ51013B", + "allResponseList" : [ { + "contentId" : "3325080", + "userName" : "Bill Johns", + "rankPoints" : "46985", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 1:40 AM", + "userId" : "244698", + "content" : "Hellocompany wireless power devices are limited to receiver side. 1.) BQ51013B and BQ51003 -- 5V output devices the 13B is up to 1A output and 003 is 500mA output. 2.) BQ5105XB -- Direct wireless power to battery charger, up to 1A output current. 3.) BQ51021 / 020 -- Are higher efficiency device with adjustable output (4.5V to 8V). the 021 has I2C interface." + } ], + "tags" : [ "/support/power-management/f/196/tags/bq51013B" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899375.json b/data/json/DLP/899375.json new file mode 100644 index 0000000000000000000000000000000000000000..7dc3202aa284744c34060e1e15e373b5956437b7 --- /dev/null +++ b/data/json/DLP/899375.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899375", + "reporterName" : "Joshua Redstone", + "rankPoints" : "60", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ25713: Cheapest or simplest 3s LiPo boost charger and balancer?", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 14", + "queryText" : "Part Number: BQ25713 Hi, I'm thinking of using the BQ25713 to charge a 3s Lipo pack from USB. My circuit involves a microcontroller that will control the BQ25713 using I2C. I'm wondering what's the least expensive way to add cell balancing logic? I saw the BQ76920, but was wondering if there's anything simpler or less expensive. Or, is there another boost lipo charge chip that includes balancing? System load will be up to 13 watts. Thanks, Josh", + "partNumber" : " BQ25713", + "allResponseList" : [ { + "contentId" : "3327427", + "userName" : "Tiger Zhou", + "rankPoints" : "610", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 6:17 PM", + "userId" : "1451791", + "content" : "Sorry, we don't have a battery charger integrated with cell balancer right now." + }, { + "contentId" : "3327634", + "userName" : "Joshua Redstone", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 10:22 PM", + "userId" : "6326024", + "content" : "Ok, thanks. J" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25713", "/support/power-management/f/196/tags/LiPo", "/support/power-management/f/196/tags/BQ76920", "/support/power-management/f/196/tags/balancing", "/support/power-management/f/196/tags/USB%2bcharging" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899379.json b/data/json/DLP/899379.json new file mode 100644 index 0000000000000000000000000000000000000000..0ad6c77dedc0ec155f2c0337f0207fe3301c8d5b --- /dev/null +++ b/data/json/DLP/899379.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899379", + "reporterName" : "Mike Brady", + "rankPoints" : "205", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ76930EVM: Evaluation software fails to detect connected device", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 18", + "queryText" : "Part Number: BQ76930EVM Just realised the image I posted shows the cable connected to SMBus... I posted the wrong image, the correct one should show it connected to I2C. Hi I'm hitting a problem when I try to open the evaluation software. It throws up an error message which reads 'Unable to read ADC Gain and Offset from connected device. Please ensure a powered bq789X0 is connected to the I2C communications lines on the communication adapter...etc, etc'. What is particularly frustrating is that I have had this working cleanly in the past - I have just resurrected this project and have now hit this problem so it's quite likely it's caused by something I've got configured wrong. I'm powering the board using an external power supply, providing around 30V and the board is connected (via I2C) to an EV2400. I've attached a picture of the board showing its configuration - ignore the cable in the shot, it's for connecting my battery but is currently disconnected. Any ideas on what might be wrong here? Cheers, Mike", + "partNumber" : " BQ76930EVM", + "allResponseList" : [ { + "contentId" : "3326244", + "userName" : "WM5295", + "rankPoints" : "39810", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 8:58 PM", + "userId" : "17523", + "content" : "Hi Mike, The LED is lit so the board has power, You are using an EV2400 so you don't want the pull up shunts, they are removed. As you note, in the picture the SMBus connector is used, move to the I2C. Also be sure to move the EV2400 end to the I2C connector. Be sure to boot the board with the pushbutton left of the PACK- terminal in the picture. Check that REGOUT has gone high, then you may need to check continuity on the I2C lines from the EV2400, The connector pins or the cable are the most likely to open, Inspect at various points with a scope while trying the read. You might unplug the EV2400 & restart the software also. Be sure there is no another instance of the software or a BQStudio running which has claimed the interface." + }, { + "contentId" : "3327768", + "userName" : "Mike Brady", + "rankPoints" : "205", + "rankName" : "Prodigy", + "date" : "Apr 25, 2020 4:40 AM", + "userId" : "6003575", + "content" : "Hi WM5295 Thanks for providing your checklist. I worked through it and it is now working once again. I had mistakenly been pressing the button labelled Display and not the Boot button. Cheers, Mike" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ76930EVM", "/support/power-management/f/196/tags/EV2400" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899385.json b/data/json/DLP/899385.json new file mode 100644 index 0000000000000000000000000000000000000000..bebead004bd94429f89b9b155699e265bf413601 --- /dev/null +++ b/data/json/DLP/899385.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899385", + "reporterName" : "Mason Noh", + "rankPoints" : "2470", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS55288: TPS55288 Standalone operation", + "rankName" : "Expert", + "replies" : " 3", + "views" : " 19", + "queryText" : "Part Number: TPS55288 Hi TI, TPS55288 can be used without I2C Control?", + "partNumber" : " TPS55288", + "allResponseList" : [ { + "contentId" : "3325068", + "userName" : "Helen chen", + "rankPoints" : "32965", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 1:30 AM", + "userId" : "4197150", + "content" : "Dear Sir, You can choose TPS552882 non-I2C version." + }, { + "contentId" : "3325213", + "userName" : "Mason Noh", + "rankPoints" : "2470", + "rankName" : "Expert", + "date" : "Apr 23, 2020 4:44 AM", + "userId" : "4307536", + "content" : "Dear chen, TPS552882 can't be searched on website. Has it not been released yet?" + }, { + "contentId" : "3326444", + "userName" : "Helen chen", + "rankPoints" : "32965", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 1:00 AM", + "userId" : "4197150", + "content" : "Yes, this part hasn't been published yet. You can contact with the product line marketing for the samples." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS55288" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899389.json b/data/json/DLP/899389.json new file mode 100644 index 0000000000000000000000000000000000000000..d489c5f9ef1b6fc91692410ea8c81cd5fd8d19ad --- /dev/null +++ b/data/json/DLP/899389.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899389", + "reporterName" : "user4774907", + "rankPoints" : "70", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM5017: Can UVLO pin connect to GND while measuring the shutdown current ?", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 15", + "queryText" : "Part Number: LM5017 The datasheet say \" When the UVLO pin voltage is below 0.66 V, the regulator is in a low current shutdown mode \". So can we connect the UVLO to GND for measuring the shutdown current ?", + "partNumber" : " LM5017", + "allResponseList" : [ { + "contentId" : "3325154", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 23, 2020 2:51 AM", + "userId" : "3498075", + "content" : "Hi, Yes, pls take account of bias current by resistor connected to VIN rail. B R Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM5017" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899390.json b/data/json/DLP/899390.json new file mode 100644 index 0000000000000000000000000000000000000000..1e49587cf31f283f6c15f8386ccb813e8edd038d --- /dev/null +++ b/data/json/DLP/899390.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899390", + "reporterName" : "kura", + "rankPoints" : "3295", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS1HB08-Q1: 24V Operation", + "rankName" : "Genius", + "replies" : " 1", + "views" : " 26", + "queryText" : "Part Number: TPS1HB08-Q1 When my customer use TPS1HB08A-Q1 in 24V VBB operation,we found following description in datasheet. VBB Extended supply voltage(2) 3 - 28 V (2)Device will function within extended operating range, however some parametric values might not apply Do you have any parameter list at 24V operation. regards,", + "partNumber" : " TPS1HB08-Q1", + "allResponseList" : [ { + "contentId" : "3325979", + "userName" : "Timothy Logan", + "rankPoints" : "5600", + "rankName" : "Expert", + "date" : "Apr 23, 2020 4:35 PM", + "userId" : "1849899", + "content" : "Hello Kura-san, Above the 18V nominal operating voltage if a short-to-ground fault occurs the device is not guaranteed to survive. Additionally the only parameter that is specified above 18V is the on-resistance. Other parameters are only specified VBB = 6 V to 18 V." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS1HB08_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899395.json b/data/json/DLP/899395.json new file mode 100644 index 0000000000000000000000000000000000000000..042f84a7b8f914fe51b39240e9c53055adff9c95 --- /dev/null +++ b/data/json/DLP/899395.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899395", + "reporterName" : "Mark0007", + "rankPoints" : "945", + "resolutionStatus" : "Resolved", + "ticketName" : "LM134: Temperature stabilized current source", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 15", + "queryText" : "Part Number: LM134 Hi sir, I'm looking for a constant current source with the following properties: - output current ideally in the 50mA range, but 10mA could work too - the precision doesn't matter so much (100ppm is plenty), but it's more important for the current to be stable over temperature - operational temperature up to 125C The application is in-circuit temperature sensing by measuring changes to the resistance of copper. The current source drives some long, intentional copper traces and we measure the voltage across the long trace. I'm looking for something that can deliver a relatively stable current over a wide temperature range. The LM134 has an output current drift of 0.3%/C, or equivalently 3000ppm/C. I'm interested in something that's closer to the 3 or 30ppm/C range, so that the total fluctuation between 25C and 125C is ~3000ppm. Thank u. Regards,", + "partNumber" : " LM134", + "allResponseList" : [ { + "contentId" : "3326178", + "userName" : "Marcoo Z", + "rankPoints" : "12020", + "rankName" : "Genius", + "date" : "Apr 23, 2020 7:46 PM", + "userId" : "4617794", + "content" : "Are you open to using a discrete solution? The LM4051-N is a high precision voltage reference that can be configured to be a current source as per fig 29 on the DS. This can achieve a higher precision than the LM134. The total temperature fluctuation of the LM4051-N is around 3300ppm." + }, { + "contentId" : "3326726", + "userName" : "Mark0007", + "rankPoints" : "945", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 6:52 AM", + "userId" : "6175619", + "content" : "Great helpful, thank u so much." + } ], + "tags" : [ "/support/power-management/f/196/tags/LM134" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899399.json b/data/json/DLP/899399.json new file mode 100644 index 0000000000000000000000000000000000000000..fa183a39df53823e0dfe13e21fb124984878a5fe --- /dev/null +++ b/data/json/DLP/899399.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899399", + "reporterName" : "D.R.", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS23754: Wrong PoE classification TPS23754 with 802.3at GLOBTEK GT-96300-3656-T3-AP PoE injector - resolved TPS23754: Wrong PoE classification TPS23754 with 802.3at GLOBTEK GT-96300-3656-T3-AP PoE injector//support/power-management/f/196/t/784349", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 15", + "queryText" : "Part Number: TPS23754 I'm trying to reply to the posting: TPS23754: Wrong PoE classification TPS23754 with 802.3at GLOBTEK GT-96300-3656-T3-AP PoE injector//support/power-management/f/196/t/784349 GlobTek was made aware of this issue and the product GLOBTEK GT-96300-3656-T3-AP PoE injector, the only Level VI Efficient POE injector on the market, has been updated to fix this issue of improper handshake and class 2 communication. All new production incorporates this fix. Sorry for the trouble! Thanks!", + "partNumber" : " TPS23754", + "allResponseList" : [ { + "contentId" : "3326054", + "userName" : "Michael Pahl", + "rankPoints" : "4915", + "rankName" : "Expert", + "date" : "Apr 23, 2020 5:33 PM", + "userId" : "6102321", + "content" : "D.R. , Thank you very much for the update! I am glad to hear things got fixed. Can you mark this thread as resolved? Thank you! Regards, Michael Pahl" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS23754" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899409.json b/data/json/DLP/899409.json new file mode 100644 index 0000000000000000000000000000000000000000..c0acaca5f4a1934fb61d769789dc206bb4b2de75 --- /dev/null +++ b/data/json/DLP/899409.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899409", + "reporterName" : "xingquan liu", + "rankPoints" : "50", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ27426: BQ27426 application circuit confirmation", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 17", + "queryText" : "Part Number: BQ27426 Hi there, I have a question about the application circuit of BQ27426. According to the datasheet, the charging current is opposite to the battery discharging current, My question is : When the charging circuit works, does the reverse voltage drop on the 10 mΩ sense resistor(SRN-SRP) affect the chip? Subsequent question is: In the case of charging, can the IC also complete the charging current detection. Datasheet recommended applications are as follows, Thanks for your help.", + "partNumber" : " BQ27426", + "allResponseList" : [ { + "contentId" : "3325998", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 4:52 PM", + "userId" : "1864278", + "content" : "See my comments below. When the charging circuit works, does the reverse voltage drop on the 10 mΩ sense resistor(SRN-SRP) affect the chip? [Andy] No. The current flows in different directions during charge and discharge. In the case of charging, can the IC also complete the charging current detection? [Andy] What do you mean by \"charging current detection\". The current is always monitored by the gauge." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ27426" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899418.json b/data/json/DLP/899418.json new file mode 100644 index 0000000000000000000000000000000000000000..d2a6b1a6aadc3719b1e3b1d7fc3166dc23c57e08 --- /dev/null +++ b/data/json/DLP/899418.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899418", + "reporterName" : "Alice_chen", + "rankPoints" : "80", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ24780S: The selection of RC on ACDEC/ACDRV pin", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 16", + "queryText" : "Part Number: BQ24780S Hi team: I want to know the specific function of C1 C2，what’s the effect if I remove them? What are the requirements for their (C1 C2 R3 R4 )selection of value? Thanks! Alice", + "partNumber" : " BQ24780S", + "allResponseList" : [ { + "contentId" : "3326155", + "userName" : "Steve Preissig", + "rankPoints" : "4610", + "rankName" : "Expert", + "date" : "Apr 23, 2020 7:09 PM", + "userId" : "8914", + "content" : "Hi Alice, C1 and C2 are used to control the turn-on speed of Q1 and Q2. If the turn-on speed is too fast, there is a large inrush current into the system capacitors and this could cause the adapter voltage to crash, which would be sensed as a disconnect at ACDET pin. If the turn-on speed is too slow, there is more heat generated and there is a danger of damaging the Q1 and Q2 FETs. Since different adapters have different capabilities and different FETs have different safe operating curves, the optimal turn-on speed is system dependent, but these capacitor values form a good balance. I would say that you might reasonably half or double them, but going outside that range has a good chance of causing one of the problems mentioned above. The R3 and R4 serve a different purpose. They limit current to protect the CMSRC and ACDRV pins during plugin transients. These values should not be modified. Regards, Steve" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24780S" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899421.json b/data/json/DLP/899421.json new file mode 100644 index 0000000000000000000000000000000000000000..32ff2b4afe2cece7f1c6b0b0d72820cc85173060 --- /dev/null +++ b/data/json/DLP/899421.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899421", + "reporterName" : "Tommy Tzeng", + "rankPoints" : "1320", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS546D24A: A version", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 34", + "queryText" : "Part Number: TPS546D24A Hi Team, what is the difference between TPS546D24 and TPS546D24A ? exactly the same?", + "partNumber" : " TPS546D24A", + "allResponseList" : [ { + "contentId" : "3325769", + "userName" : "Peter James Miller", + "rankPoints" : "19805", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 2:52 PM", + "userId" : "8518", + "content" : "Tommy Tzeng No, the TPS546D24 and the TPS546D24A are not exactly the same. They are pin to pin compatible, use the same power path components and the same control loop architecture. They also share most of the same PMBus commands along with using the same data format and structure for all common commands, but there are a few minor differences. The TPS546D24A is the newer part and should be selected for new designs. What is the TPS546D24A? The TPS546D24A is an improved and updated version of the TPS546D24. What has remained the same? The TPS546D24A is pin to pin and layout compatible with the TPS546D24 All pin functions on the TPS546D24A remain the same as they were on the TPS546D24 All pin interfaces on the TPS546D24A remain the same as they were on the TPS546D24 All pin programmable functions on the TPS546D24A use the same pins for programming as the TPS546D24 All resistorless programming options (Short / Float) on the TPS546D24A program the same PMBus values as the TPS546D24 The TPS546D24A is PMBus Compatible with the TPS546D24 All PMBus Commands supported by the TPS546D24 are supported by the TPS546D24A What needs to change? Non Zero Resistors from the 4 Pin Programming pins (MSEL1, MSEL2, VSEL, and ADRSEL) to BP1V5 or AGND will need to use updated values per the TPS546D24A programming table. No non-zero values remain unchanged. Readback verification of IC_DEVICE_ID and IC_DEVICE_REV over PMBus will need to be updated to include the correct readback values for the TPS546D24A Device IC_DEVICE_ID IC_DEVICE_REV TPS546D24 54 49 54 6D 24 00 20 00 TPS546D24A 54 49 54 6D 24 41 40 00 TPS546B24A 54 49 54 6B 24 41 40 00 TPS546A24A 54 49 54 6A 24 41 40 00 With the following exceptions, every pin programmable option available on the TPS546D24 is available as a pin programmable option on the TPS546D24A, though some single-resistor options available on the TPS546D24 require both a resistor to ground and a resistor to BP1V5 on the TPS546D24A. PMBus Addresses 32d – 47d with Phase shift 0 degrees and Sync Config Auto-detect are not available for Pin Programming on the TPS546D24A. List of Changes and Improvements Pin Strap Improvement. Pin Strap Functionality rated over full temp range (-40 to 125C) and product life. Requires BOM change (See Above) Remap Pin Detection All PMBus functions are programed by the same pin (MSEL1, MSEL2, VSEL, and ADRSEL) All PMBus options from TPS546D24 are mapped to TPS546D24A Except: SYNC Auto-detect w/ PMBus Address 32d – 47d Some TPS546D24 Single Resistor options require 2 resistors in TPS546D24A. PGOOD release on VOUT_OV_WARN/VOUT_UV_WARN Correctly release PGOOD (allow to rise high) following an output voltage OV or UV warning that does not trigger an OV or UV fault without issuing a CLEAR_FAULTS command. Improved Robustness. Improved protection from improper PMBus commands. Prevent Rail shut-down due to BCX_CLK short to ground Improved cold-temperature, high frequency operation. Eliminate possibility that second Warning or second Fault in quick succession is not reported by PMBus STATUS. EN/UVLO leak current improved to prevent “Drift-on” with floating EN/UVLO pin. Add PMBus Command Enabled Internal Pull-up for RESET_B to VDD5 to eliminate need for external pull-up resistor. Start Switching at end of TON_RISE if VOUT greater than VOUT_COMMAND to discharge > 100% pre-biased outputs. Maintain Free Running Oscillator Frequency when SYNC_CONFIG changed to SYNC_OUT while output is disabled. Block Setting PMBus SLAVE ADDRESS command programming to Addresses: 0x8, 0x37, 0x0C, 0x61 Eliminate VOUT OV/UV WARN LIMIT “Walking” on repeated STORE/RESTORE cycles Eliminate need to READ individual telemetry values before using READ_ALL Add “Ignore Fault on Margin” support in OPERAITON command Add MFR_ID command support 3-byte User Programmed ID value stored in NVM. Add READ_VIN and Enable READ_VIN bytes of READ_ALL, TELEMETRY_CONFIG Add PVIN telemetry. Add STATUS_PHASE command support Identifies which slave within a stacked device is reporting an Over Current or Over Temperature warning or fault condition. Add VIN_OV_FAULT_LIMIT and VIN_UV_WARN_LIMIT command support Warn of low PVIN and stop switching in case of high PVIN Allow READ_VOUT to report VOSNS of Slave device in Stack Makes VOSNS telemetry of slave devices in multi-phase stacks available for telemetry via the READ_VOUT function. Force 20C OT_FAULT hysteresis when OT_WARN_LIMIT > OT_FAULT_LIMIT" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS546D24A", "/support/power-management/f/196/tags/tps546d24" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899422.json b/data/json/DLP/899422.json new file mode 100644 index 0000000000000000000000000000000000000000..da6b63d589f3ce39e059187b6aa719f92457fc46 --- /dev/null +++ b/data/json/DLP/899422.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "899422", + "reporterName" : "Happy Debugging", + "rankPoints" : "40", + "resolutionStatus" : "", + "ticketName" : "TLC5947: TLC5947 Cascading - outputs shut down at different voltage levels", + "rankName" : "Prodigy", + "replies" : " 6", + "views" : " 67", + "queryText" : "Part Number: TLC5947 Have a few TLC5947 off the shelf boards with the same circuitry as he Adafruit to kick off work with the TLC5947. These boards have a header on each side where all signal (Vdd, Gnd, Latch, clk) are connected together except for Data In/Out of-course, blank is pulled down with an R to ground. These board have an onboard regulator of 5V to the TLC5947 while the connected input voltage is directly supplied to the LED outputs. Interestingly, the boards work when supplied with 3.3 or 5V as well. An RPI 3 is used to control the board using bit-bang I/O and the boards are fed with an exterrnal power supply (78xx regulators) independently from the RPI, RPI and the boards share a common ground. The R is set for 15mA CC. When the boards are in parallel (all boards get Data In from the same wire form RPI) this works all well and stable at 3.3, 5V and 9V input voltages. For all transactions, all lights all have the same color repeatedly tested in a loop for several hours for many different colors settings. In cascading (serial) changing the DATA Out to from one to another board's DIN,it works fine and stable as well for hours at 3.3V. However changing the voltage to 5V or 9V to the board, all LED outputs immediately shut down (no LED signal). This happens already with 2 boards and currently using 3 LEDs per board. when removing the DIO to DIN wire, the first board continues to work normally. Swapping the boards has the same effect. Lowering down the clock speed to very slow frequency has no effect either. It does not look like this is related parasitic capacitance . Somehow connecting anything to DIO causes this problem. Is there something in particular to consider when cascading ?", + "partNumber" : " TLC5947", + "allResponseList" : [ { + "contentId" : "3326521", + "userName" : "Hardy Wu", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 2:12 AM", + "userId" : "4961195", + "content" : "Hi, Could you help to share the schematic with me? You mentioned that here is an onboard regulator of 5V for TLC5947. This regulator supply for both VCC and VLED?" + }, { + "contentId" : "3326649", + "userName" : "Happy Debugging", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 5:40 AM", + "userId" : "5269192", + "content" : "Hi, the schematic is in this document:. The regulator is for the TLC5947 only, VIN is directly connected to the LEDs V+ outputs and the regulator input. Testing this a bit more I am concerned if this is a ground loop issue using multiple boards. The boards just have a GND pin and connecting more boards may be an issue (?) Experimented with the ground wiring a bit and could get it to run at 5V once with the external psup. I am going to test this further with a simple MCU controller (using basic bit bagingt ) instead of the RPI Writing some code for this now. Perhaps it wasn't a good idea using these boards for a cascaded situation but hoped to use them as a quick evaluation of the design. cdn-learn.adafruit.com/.../tlc5947-tlc59711-pwm-led-driver-breakout.pdf" + }, { + "contentId" : "3328040", + "userName" : "Hardy Wu", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 26, 2020 8:54 AM", + "userId" : "4961195", + "content" : "Hi, Sorry that we also did not try using discrete boards for a cascaded structure before. Based your description, GND loop may be a problem. Could you measure the VCC/GND/VIREF voltage of TLC5947 in 2nd board and also capture the SIN/SCLK/XLAT/BLANK to see if control signal is right?" + }, { + "contentId" : "3328103", + "userName" : "Happy Debugging", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 26, 2020 3:07 PM", + "userId" : "5269192", + "content" : "Hi I do not have a scope on hand right now. The Vcc is 3.3V on the TLC5947 (output of the regulator). I ported the code from RPI to a small micro-controller with 4 boards in cascade now on an soldered experiment board instead of a breadboard before. All LEDS work now in cascade and do not shutdown. Though, it was only error free at 3.3V Vin to the boards and LED anode. With 5V to the boards and to the anode of the LEDS was very unstable (often wrong LEDs on/off, most on 4th and sometimes on on 3rd board) . After moving the CLK and DATA lines away and changing the way GND was connected from power and the MCU board, it became much better, about 1 error in 10 transactions. With 9V to the boards and anodes all the light colors were very bright and constantly wrong on all the boards. A solder wired board is not ideal but have not had much issues. with other SPI chips such as SPI LCDs, sensors' and many others. The CLK and DATA lines seem extremely sensitive, just touching with them with hand and it all goes wrong. at 5 (3.3V is ok) Perhaps need to shield the wires or some form of signal conditioning. For my design I cannot permit one error as it would immediately cause a poor user experience. Here is a high level diagram of the setup. Note that blank is internally pulled down on the board itself. @3.3 one error in ~100 transactions, @5.5 1 error in 20 transactions @9V, all transactions wrong outputs. Powering the LED anodes and boards from separate regulators (but common ground) give the same result." + }, { + "contentId" : "3328562", + "userName" : "Hardy Wu", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 9:54 AM", + "userId" : "4961195", + "content" : "Hi, I think the drive capability of SOUT may not strong enough to exclude parasitic parameters and noise caused by distributed boards. The transmit signal may be not established well. Do you have any logic buffer IC in hand can be connected between two boards?" + }, { + "contentId" : "3328836", + "userName" : "Happy Debugging", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 1:57 PM", + "userId" : "5269192", + "content" : "Hi Thanks, I was afraid of that. I will try that but it may take me a few days to get to that. I also will add a 10uF cap on the board and use a ground shielded connected cable for CLK and DAT. Vref = 1.19V at 3.3, 5 and 9V input voltages on all boards.. Vcc pin on tthe TLC5947 is 3.0V @ 3.3V input and 4.7@ 5V and 9V input." + } ], + "tags" : [ "/support/power-management/f/196/tags/TLC5947" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899423.json b/data/json/DLP/899423.json new file mode 100644 index 0000000000000000000000000000000000000000..98ecd83f770f510d071b0c2e9fe8fe932158078f --- /dev/null +++ b/data/json/DLP/899423.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "899423", + "reporterName" : "Brad S", + "rankPoints" : "40", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ25713: I2C - debug lack of answer?", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 29", + "queryText" : "Part Number: BQ25713 Hi, Any ideas whats going wrong here trying to get I2C communication working with the charger IC? suggestions? Using the EVM board, but not the usb-i2c connector or your software (do not have them). so our microcontroller and our code. the trace is taken at the EVM jumper for SDA and SCL. EVM has power. On the right of the below trace i expect manuf ID 0x40, not 0xFF (its reading 2 bytes for no good reason). Same result for ChargeOption0 To go through the test from left to right The board address is 6B ->D6,D7. register 0x14 does not exist to test for NACK . register 0x2E should return manufacture id 0x40. register 0x00 ChargeOption0 should default to 0xE60E. thanks in advance", + "partNumber" : " BQ25713", + "allResponseList" : [ { + "contentId" : "3327439", + "userName" : "Tiger Zhou", + "rankPoints" : "610", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 6:24 PM", + "userId" : "1451791", + "content" : "Hi, Brad, Could you capture another waveform usingcompany connector andcompany software? so we can compare both waveforms and find the differences." + }, { + "contentId" : "3327718", + "userName" : "Brad S", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 25, 2020 1:33 AM", + "userId" : "6308198", + "content" : "As written in the original post I do not have them (i.e. no EV2400). By the time I realised the EVM had been ordered without it, we didnt want to wait for Covid time frame ordering so wrote the I2C code (TI could replicate reasonably easily with the 2 registers shown in the main post)" + }, { + "contentId" : "3329644", + "userName" : "Tiger Zhou", + "rankPoints" : "610", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 11:56 PM", + "userId" : "1451791", + "content" : "Hi, Brad, I am not a digital engineer. I checked the pulse train when reading 0x2E, it returns 0x40 correctly. I can see there is another Start signal in the second byte. The pulses are \"S 1101 0110 A 0010 1110 A S 1101 0111 A 0100 0000 1 P\"" + }, { + "contentId" : "3329952", + "userName" : "Brad S", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 28, 2020 6:10 AM", + "userId" : "6308198", + "content" : "Tiger Zhou I am not a digital engineer me neither :) thankyou for picking that up. The missing start signal was required from master. now seeing the expected manufacturer id 0x40 and device 0x88" + } ], + "tags" : [ "/support/power-management/f/196/tags/_2300_%2b%2b%2bi2c", "/support/power-management/f/196/tags/BQ25713", "/support/power-management/f/196/tags/_2300_%2bbattery%2bmanagement%2band%2bcharger%2bLi_2D00_ion" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899424.json b/data/json/DLP/899424.json new file mode 100644 index 0000000000000000000000000000000000000000..8c4263f21b3cf8b1032c9f9e33bba9cc3c295bb5 --- /dev/null +++ b/data/json/DLP/899424.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "899424", + "reporterName" : "Dan1", + "rankPoints" : "520", + "resolutionStatus" : "Resolved", + "ticketName" : "LM3880: Shutdown current", + "rankName" : "Intellectual", + "replies" : " 4", + "views" : " 25", + "queryText" : "Part Number: LM3880 What is the shutdown current of LM3880?", + "partNumber" : " LM3880", + "allResponseList" : [ { + "contentId" : "3325707", + "userName" : "yihe", + "rankPoints" : "23920", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 2:19 PM", + "userId" : "303879", + "content" : "Hi Could you please be more specific about shutdown current? Regards Yihe" + }, { + "contentId" : "3325935", + "userName" : "Dan1", + "rankPoints" : "520", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 4:12 PM", + "userId" : "6255688", + "content" : "Hi Yihe, The total current consumed by LM3880 while powered, but when the enable pin is unasserted. We are trying to optimise battery life. Kind regards," + }, { + "contentId" : "3325987", + "userName" : "yihe", + "rankPoints" : "23920", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 4:39 PM", + "userId" : "303879", + "content" : "Hi If you try to saving the battery life, the pull up souce of the flag output shall not be the same source to power LM3880. otherwise, the current consumption would be much higher than EN pin is asserted case. if the EN is de-asserted and flags have pull up from other source, the total current is very close to the operating quiescent case. Regards Yihe" + }, { + "contentId" : "3326448", + "userName" : "Dan1", + "rankPoints" : "520", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 1:03 AM", + "userId" : "6255688", + "content" : "Thanks Yihe" + } ], + "tags" : [ "/support/power-management/f/196/tags/sleep", "/support/power-management/f/196/tags/current", "/support/power-management/f/196/tags/LM3880", "/support/power-management/f/196/tags/battery", "/support/power-management/f/196/tags/sequencer", "/support/power-management/f/196/tags/consumption", "/support/power-management/f/196/tags/power", "/support/power-management/f/196/tags/Shutdown" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899427.json b/data/json/DLP/899427.json new file mode 100644 index 0000000000000000000000000000000000000000..f59e204a0e1b329708f160c9b07b632d4d88cf1e --- /dev/null +++ b/data/json/DLP/899427.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899427", + "reporterName" : "Vincent Chen64988", + "rankPoints" : "3175", + "resolutionStatus" : "", + "ticketName" : "ULN2003A: Damage issue", + "rankName" : "Expert", + "replies" : " 3", + "views" : " 16", + "queryText" : "Part Number: ULN2003A Hi Team, My customer uses ULN2003ADR to drive relays for PLC DO application, they received failure units returned from their end customer and the root cause of TI's FA report is always EIPD, although the fail rate is quite low that few units per year. So, customer is asking any suggestion on circuit that can improve their system's robustness, below is customer's circuit. Add some information, DO has two types module, relay and MOSFET. The failure units almost from relay type module. Regarding +24V1 power rail, customer have also placed TVS, line filter, XY capacitor to filter other unexpected noise or sipke. Thanks a lot. Vincent Chen", + "partNumber" : " ULN2003A", + "allResponseList" : [ { + "contentId" : "3325893", + "userName" : "Andy Robles", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 3:51 PM", + "userId" : "6043129", + "content" : "Hi Vincent, Welcome to E2E! This looks like a typical application of the ULN2003 device, and I don't see any concerns with the circuitry. I do have a couple questions concerning the output of the ULN2003. How much current is going through the channels for the relays? Are all the channels being used at the same time? What is the duty cycle of channels? (i.e. do they have PWM signal or stay always on, 100% duty cycle, when enabled?) Best regards, Andy Robles" + }, { + "contentId" : "3326552", + "userName" : "Vincent Chen64988", + "rankPoints" : "3175", + "rankName" : "Expert", + "date" : "Apr 24, 2020 3:05 AM", + "userId" : "1472430", + "content" : "Hi Andy, Thanks a lot for checking customer's circuit and application, please find customer's reply below and give us your comment. How much current is going through the channels for the relays? [Customer] The resistance of relay coil is about 5.2KΩ, the current is 4.52mA for single channel Are all the channels being used at the same time? [Customer] Yes, that’s possible, depend on customer’s application What is the duty cycle of channels? (i.e. do they have PWM signal or stay always on, 100% duty cycle, when enabled?) [Customer] The maximum frequency of relay output was limited at 1Hz, i.e the fastest response time is 0.5s to transfer next status. there exist the 100% duty cycle situation, also depend on customer’s application. Besides, one question from customer who is wondering if E pin(its connected to ground) experiences a large ground bouncing that will damage input side via internal diode? Thanks very much. Vincent Chen" + }, { + "contentId" : "3327544", + "userName" : "Andy Robles", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 9:05 PM", + "userId" : "6043129", + "content" : "Hi Vincent, Application wise the ULN2003 is not being electrically stressed by the configuration or by any load currents that are being pulled by the coils. Circuit wise there isn't anything to my knowledge that could further increase the robustness of this part of the system. Having said that, there could be other overall system events that could damage the device if anything exceeds the abs max electrical specifications of the device. One thing you mentioned was the ground bouncing which would be a system event on the ground plane of the PCB that could cause this, but that would be external to the circuit implementation of the ULN2003. Since the nature of the event seems to be random and only happen in a few units per year there isn't a way to further troubleshoot this unless the customer has scope shots at the time the event happens that over stresses the device with key signals from the circuit(i.e. input, output, VCC, GND). Best regards, Andy Robles" + } ], + "tags" : [ "/support/power-management/f/196/tags/ULN2003A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899430.json b/data/json/DLP/899430.json new file mode 100644 index 0000000000000000000000000000000000000000..6139516210682786e5855a2748048d7feb7a4aaa --- /dev/null +++ b/data/json/DLP/899430.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899430", + "reporterName" : "Jacky Wang(QD)", + "rankPoints" : "7205", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS56637: Question for TPS56637 maximum output voltage", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 12", + "queryText" : "Part Number: TPS56637 Hi Experts, From the datasheet of TPS56637, we mentioned the recommended maximum output voltage is 13V as below. We want to know what's the limitation behind this specification? Can you use this device to output 16V from 18V input? If we used the Toff_min to calculate the Dmax, it is around 85% maximum duty cycle: Dmax=Fsw*(1/Fsw-Toff_min) Thanks.", + "partNumber" : " TPS56637", + "allResponseList" : [ { + "contentId" : "3325262", + "userName" : "Yuchang Zhang", + "rankPoints" : "8080", + "rankName" : "Expert", + "date" : "Apr 23, 2020 5:54 AM", + "userId" : "4780235", + "content" : "Hi Jacky, it can't support 16V/18V application since the output voltage is limited by some internal compensation net circuits, if over 13V, unstable will happen. not related to the max duty. Yuchang" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS56637" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899431.json b/data/json/DLP/899431.json new file mode 100644 index 0000000000000000000000000000000000000000..fe99b808c63ea120ff5ad18a039e75ab2a4a47f5 --- /dev/null +++ b/data/json/DLP/899431.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "899431", + "reporterName" : "Oliver Ou", + "rankPoints" : "2550", + "resolutionStatus" : "", + "ticketName" : "TPS24742: delay time from OV recovery to Gate driver output", + "rankName" : "Intellectual", + "replies" : " 5", + "views" : " 19", + "queryText" : "Part Number: TPS24742 Hi Customer wants to know the delay time from OV recovery to the hotswap get driver starts on TPS24742. Could you give a comment? Thanks.", + "partNumber" : " TPS24742", + "allResponseList" : [ { + "contentId" : "3325290", + "userName" : "Praveen GD", + "rankPoints" : "9575", + "rankName" : "Genius", + "date" : "Apr 23, 2020 6:23 AM", + "userId" : "4421098", + "content" : "Hi Oliver, Does customer wants to know the time when Gate of TPS24742 starts to rampup again after an over voltage event ?" + }, { + "contentId" : "3326334", + "userName" : "Oliver Ou", + "rankPoints" : "2550", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 10:28 PM", + "userId" : "1117254", + "content" : "Hi Praveen ， Yes, this data is helpful for Priority Muxing desgin. By the way, We found at hotswap+oring design， the middle point may goes lower for freewheel current when hotswap shut down. if the middle point is lower than 0V, hotswap would have several glitch before restart normal. is it right? Add a schottky diode in middle point to clamp the negative voltage would be helpful? Thanks." + }, { + "contentId" : "3328898", + "userName" : "Praveen GD", + "rankPoints" : "9575", + "rankName" : "Genius", + "date" : "Apr 27, 2020 2:28 PM", + "userId" : "4421098", + "content" : "Hi Oliver, The gate of the TPS24742 starts to rampup after an over voltage event within few micro seconds. he actual time taken by the gate to rampup will depend on the current limit and power limit loops. When both the hotswap and ORIng FET's (which are in series) are turned OFF there would be no current flow in the path. Can you explain your question in more detail, probably with pictorial representation ?" + }, { + "contentId" : "3329790", + "userName" : "Oliver Ou", + "rankPoints" : "2550", + "rankName" : "Intellectual", + "date" : "Apr 28, 2020 2:42 AM", + "userId" : "1117254", + "content" : "Hi Praveen, Customer uses below circuit, hotswap then oring. When hotsap is shuttled down by control signal, the freewheel current will still go though body diode of OringFET and may cause middle point goes lower than zero. Customer has putted D2 to clamp it but still can see a small negative voltage. How about the delay time from OV recovery to hotswap circuit is ready to send gate driver signal? Thanks." + }, { + "contentId" : "3329977", + "userName" : "Praveen GD", + "rankPoints" : "9575", + "rankName" : "Genius", + "date" : "Apr 28, 2020 6:33 AM", + "userId" : "4421098", + "content" : "Hi Oliver, When the Hotswap FET is OFF and the body diodes are connected back-to-back, I don't see any current path from Vin to Vout or from Vout to Vin. I am sorry, I couldn't get the path of the freewheeling current. Can you please help me understand the path of the freewheeling current ? If there is an inductance in the output path , the inductance creates a -ve voltage at Vout during fast-trip events and this is why the schottky diode is placed at the output (to clamp the -ve voltages at the output)." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS24742" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899449.json b/data/json/DLP/899449.json new file mode 100644 index 0000000000000000000000000000000000000000..baca2e69a62bc3294722d223ba93717127c3a1b8 --- /dev/null +++ b/data/json/DLP/899449.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899449", + "reporterName" : "Kane Wan88", + "rankPoints" : "360", + "resolutionStatus" : "Resolved", + "ticketName" : "3A 27V Synchronous Buck Converter", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 29", + "queryText" : "Dear team, Could you please help to find the most suitable solution for below requirements? Thank you. Kane", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3325791", + "userName" : "Bruce Lu (MCP)", + "rankPoints" : "780", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 3:00 PM", + "userId" : "5032350", + "content" : "Hi Kane, TPS54302, 4.5V-28V, 3A, SOT23-6 package should be the device you want. Thanks." + } ], + "tags" : [ ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899450.json b/data/json/DLP/899450.json new file mode 100644 index 0000000000000000000000000000000000000000..46e7a4888c971533e3a314a332e2e0a2e45e9e15 --- /dev/null +++ b/data/json/DLP/899450.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "899450", + "reporterName" : "wenyu Ben", + "rankPoints" : "320", + "resolutionStatus" : "", + "ticketName" : "IWR6843ISK-ODS: IWR6843ISK-ODS： mmWave Demo Visualizer 1.0.0 problem , \"There is no response object in the Plots \"", + "rankName" : "Intellectual", + "replies" : " 4", + "views" : " 43", + "queryText" : "Part Number: IWR6843ISK-ODS Hi sir, I have been trying my hands on the mmWaveBoost+IWR6843ISK-ODS by running the basic ODS Point Cloud Demo. I followed all the instructions which were mentioned in thecompany Resource Explorer. and I have flashed the the binary firmware into the EVM as well. All the Software setup are as lists: -EVM: mmWaveBoost card + IWR6843ISK-ODS (ES2 device) -Toolbox: mmwave_industrial_toolbox_4_2_1 - GUI: mmWave Demoe Visualizer V1.0.0 (IR6843AOP) - Binary file: ods_point_cloud_68xx.bin @mmwave_industrial_toolbox_4_2_1\\labs\\out_of_box_demo\\68xx_ods_point_cloud_demo\\prebuilt_binaries - Config file: profile_iwr6843_ods_3d.cfg @mmwave_industrial_toolbox_4_2_1\\labs\\out_of_box_demo\\68xx_ods_point_cloud_demo\\chirp_configs Also , I have \"connected the serial port\" and \"Load the Config file\" successfully but I can't see any response object in the Plot view and he status bar , Uart port showed Hardware Connected but data port still waiting the data . I also provide the console log , please help us to see this problem and give the suggestion , thanks! --------------------------------------------------------------------------- Console Log : --------------------------------------------------------------------------- mmwDemo:/>% Carrier frequency GHz 60 Skipped mmwDemo:/>% Ramp Slope MHz/us 156 Skipped mmwDemo:/>% Num ADC Samples 256 Skipped mmwDemo:/>% ADC Sampling Rate Msps 12.5 Skipped mmwDemo:/>% ADC Collection Time us 20.48 Skipped mmwDemo:/>% Extra ramp time required (start time) us 3 Skipped mmwDemo:/>% Chirp time (end time - start time) us 21 Skipped mmwDemo:/>% Chirp duration (end time) us 24 Skipped mmwDemo:/>% Sweep BW (useful) MHz 3194.88 Skipped mmwDemo:/>% Total BW MHz 3744 Skipped mmwDemo:/>% Max beat freq (80% of ADC sampling rate) MHz 10 Skipped mmwDemo:/>% Max distance (80%) m 9.62 Skipped mmwDemo:/>% Range resolution m 0.047 Skipped mmwDemo:/>% Range resolution (meter per 1D-FFT bin) m/bin 0.047 Skipped mmwDemo:/>% Skipped mmwDemo:/>% Inter-chirp duration us 7 Skipped mmwDemo:/>% Number of chirp intervals in frame - 96 Skipped mmwDemo:/>% Number of TX (TDM MIMO) 3 Skipped mmwDemo:/>% Number of Tx elevation antennas 0 Skipped mmwDemo:/>% Number of RX channels - 4 Skipped mmwDemo:/>% Max umambiguous relative velocity kmph 48.19 Skipped mmwDemo:/>% mileph 30.12 Skipped mmwDemo:/>% Max extended relative velocity kmph 144.56 Skipped mmwDemo:/>% mileph 90.35 Skipped mmwDemo:/>% Frame time (total) ms 2.976 Skipped mmwDemo:/>% Frame time (active) ms 2.304 Skipped mmwDemo:/>% Range FFT size - 256 Skipped mmwDemo:/>% Doppler FFT size - 32 Skipped mmwDemo:/>% Radar data memory required KB 400 Skipped mmwDemo:/>% Velocity resolution m/s 0.84 Skipped mmwDemo:/>% Velocity resolution (m/s per 2D-FFT bin) m/s/bin 0.84 Skipped mmwDemo:/>% Velocity Maximum m/s 13.39 Skipped mmwDemo:/>% Extended Maximum Velocity m/s 40.16 Skipped mmwDemo:/>% Maximum sweep accorss range bins range bin 0.85 Skipped mmwDemo:/>% Skipped mmwDemo:/>sensorStop Ignored: Sensor is already stopped Done mmwDemo:/>flushCfg Done mmwDemo:/>dfeDataOutputMode 1 Done mmwDemo:/>channelCfg 15 7 0 Done mmwDemo:/>adcCfg 2 1 Done mmwDemo:/>adcbufCfg -1 0 1 1 1 Done mmwDemo:/>lowPower 0 0 Done mmwDemo:/>profileCfg 0 60 7 3 24 0 0 156 1 256 12500 0 0 30 Done mmwDemo:/>chirpCfg 0 0 0 0 0 0 0 1 Done mmwDemo:/>chirpCfg 1 1 0 0 0 0 0 2 Done mmwDemo:/>chirpCfg 2 2 0 0 0 0 0 4 Done mmwDemo:/>frameCfg 0 2 32 0 100 1 0 Done mmwDemo:/>guiMonitor -1 1 1 1 0 0 1 Done mmwDemo:/>cfarCfg -1 0 2 8 4 3 0 15.0 0 Done mmwDemo:/>cfarCfg -1 1 0 4 2 3 1 15.0 0 Done mmwDemo:/>multiObjBeamForming -1 1 0.5 Done mmwDemo:/>calibDcRangeSig -1 0 -5 8 256 Done mmwDemo:/>clutterRemoval -1 0 Done mmwDemo:/>compRangeBiasAndRxChanPhase 0.0 -1 0 1 0 1 0 -1 0 -1 0 1 0 1 0 -1 0 -1 0 1 0 1 0 -1 0 Done mmwDemo:/>measureRangeBiasAndRxChanPhase 0 1. 0.2 Done mmwDemo:/>aoaFovCfg -1 -90 90 -90 90 Done mmwDemo:/>cfarFovCfg -1 0 0.25 15 Done mmwDemo:/>cfarFovCfg -1 1 -13.39 13.39 Done mmwDemo:/>extendedMaxVelocity -1 0 Done mmwDemo:/>CQRxSatMonitor 0 3 4 63 0 Done mmwDemo:/>CQSigImgMonitor 0 127 4 Done mmwDemo:/>analogMonitor 0 0 Done mmwDemo:/>lvdsStreamCfg -1 0 0 0 Done mmwDemo:/>sensorStart Debug: Init Calibration Status = 0x1e ---------------------------------------------------------------------------", + "partNumber" : " IWR6843ISK-ODS", + "allResponseList" : [ { + "contentId" : "3325863", + "userName" : "Connor Desmond", + "rankPoints" : "410", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 3:38 PM", + "userId" : "6287558", + "content" : "Dear Wenyu: With other demos I have had similar issues with the point clouds not appearing after what appears to be a successful configuration. From my experience this points to an issue with the COM ports. I would suggest for right now that you go through all the steps in the demo's user guide and take extra precaution with regards to making sure that you use the Device Manager in Windows to make sure that you know which COM port is for configuration ( 115200 baud rate) and which one is for data ( 921600 baud rate) and see where this lands you. If this does not work reply to this post and we can adjust how we tackle your issue. Best regards, Connor Desmond" + }, { + "contentId" : "3326533", + "userName" : "wenyu Ben", + "rankPoints" : "320", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 2:37 AM", + "userId" : "5868080", + "content" : "Hi Desmond , Thank for your reply , I tried your suggest steps and check the COM port setting use the Device Manager in Windows . - COM46 is CFGPort with 115200 baud rate -COM45 is DataPort with 9600 baud rate. (It's not recommend 921600 , and there is no 921600 option) so I tried running the Demo to connect data port(COM45) with 9600 , the issue still present. then also adjust to 115200 in the Device Manager , and running the Demo data port with 115200, the issue still present. If you have any idea , please also give us the recommand baudrate setting in Device Manager when your next suggestion way , thanks." + }, { + "contentId" : "3327324", + "userName" : "Connor Desmond", + "rankPoints" : "410", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 4:50 PM", + "userId" : "6287558", + "content" : "Dear Wenyu: By default if you go into the COM port properties and check the baud rate it will be at 9600. All the that the Device Manager is needed for is so that you know which port is for configuration and which one is for data e.g. COM46 and COM 45. What is important is on the visualizer COM port setup. The CFG_port_transport and DATA_port_transport should show in the visualizer as 115200 and 921600. Once you get there check to see if any points are being displayed. If not then we can try some other things, but use the Point Cloud Demo for the 68xx ODS and follow instructions thoroughly. Also check to see if you have the SOP2 is in functional mode, and you cycle power after changing SOP2. Let me know how it goes. Best regards, Connor Desmond" + }, { + "contentId" : "3328229", + "userName" : "wenyu Ben", + "rankPoints" : "320", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 3:01 AM", + "userId" : "5868080", + "content" : "Hi Connor , I know the COM port which one is for data and which one is for configuration and I think the COM port Nubmer there in visualizer setting I choose with no problem (with the default recommend baudrate). I did and followed by the instruction on document .Also I take the picture of the board below. SOP2 set to be opened (function mode ). The problem now is at DATA PORT showed Connecting (COM45,921600 , waiting for data) , we got no data . Please help guide us quick rule out this problem . thank you." + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR6843", "/support/sensors/f/1023/tags/IWR6843ISK_2D00_ODS" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899453.json b/data/json/DLP/899453.json new file mode 100644 index 0000000000000000000000000000000000000000..24fd1934a23de16e290924761b0c608f5e3bed17 --- /dev/null +++ b/data/json/DLP/899453.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899453", + "reporterName" : "Lukas Herrmann", + "rankPoints" : "130", + "resolutionStatus" : "", + "ticketName" : "CCS/IWR6843ISK: Bypass CLI in MMWave Demo", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 34", + "queryText" : "Part Number: IWR6843ISK Tool/software: Code Composer Studio Hi Experts, I tried to modify the MMWave Demo to bypass the CLI configuration and use a fixed configuartion. I followed the “How to bypass CLI” steps from the SDK ... /ti/mmwave_sdk_03_02_00_04/packages/ti/demo/xwr64xx/mmw/docs/doxygen/html/index.html I haven't been able to get it to work yet because the given description of the different steps are very rudimental and difficult to implement. Do you have a more detailed explanation or maybe an example code? For example, the guidance says \"call MmwDemo_openSensor\" and then \"call MmeDemo_startSensor\". Is this correct? In my opinion the config_Sensor has to be called in between. By the way I have some debug issues which makes it even more difficult to analyze the code. I turned the optimization level to zero but the debugger still does not halt at breakpoints. Thaks, Lukas", + "partNumber" : " IWR6843ISK", + "allResponseList" : [ { + "contentId" : "3326684", + "userName" : "Akash Gondalia", + "rankPoints" : "39385", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 6:12 AM", + "userId" : "4768107", + "content" : "Hi Lukas, I would recommend looking at the Gesture Recognition Lab on the Resource Explorer. This Lab does use a hard-coded configuration which is in the cli.c file. Let me know if you have more questions on this. For debugging capability you will need to remake the CLI utility or the driver you are working after first removing the \"-O3\" optimizations from the .mak file. Simply remove the -O3 and then run a gmake clean all and then you should be able to step through code in the utility/driver in CCSTUDIO. If you need clarification on any of the above items please let me know. Regards, AG" + }, { + "contentId" : "3326750", + "userName" : "Lukas Herrmann", + "rankPoints" : "130", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 7:14 AM", + "userId" : "6136534", + "content" : "Hi Akash, thaks for your reply. Your link to the gesture recognition lab does not work. Anyway, I have taken a look into the gesture recognition lab from my SDK but the mmw_cli.c is not with a hardcoded configuartion. For debugging I tried the steps you mentioned but it still does not stop. I turned the optimizatin off in the properties and added gmake clean to the build properties. Maybe I did anything wrong. Can you please give a step by step advice. Kind regards, Lukas" + } ], + "tags" : [ "/support/sensors/f/1023/tags/code%2bComposer%2bstudio", "/support/sensors/f/1023/tags/IWR6843ISK" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899457.json b/data/json/DLP/899457.json new file mode 100644 index 0000000000000000000000000000000000000000..0a32ee10ac332d72b8ac4879c53cc95fc031f236 --- /dev/null +++ b/data/json/DLP/899457.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "899457", + "reporterName" : "Kazuki Kitajima", + "rankPoints" : "770", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS54302: Soft Start Time & Discharge Function", + "rankName" : "Intellectual", + "replies" : " 6", + "views" : " 33", + "queryText" : "Part Number: TPS54302 Hello team, I got a question from the customer. Could you please tell me the min/max spec for soft-start if your team has this info? Also, I would like to confirm the discharge time. This device doesn't have discharge function and discharge time would change depending on load. Is my understanding correct? Thank you for your support. Best Regards, Kazuki Kitajima", + "partNumber" : " TPS54302", + "allResponseList" : [ { + "contentId" : "3325501", + "userName" : "Ryan Hu (BSR-MV)", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 10:45 AM", + "userId" : "4779079", + "content" : "Hi Kazuki, The soft start time variation as below. This part has no discharge function, so the discharge time depends on the output capacitance and the loading. Temperature Min Avg Max 25 4.16 4.78 5.47 85 4.47 5.03 5.86 125 4.66 5.31 6.30 -40 3.90 4.63 5.39 150 4.90 5.54 6.47" + }, { + "contentId" : "3326476", + "userName" : "Kazuki Kitajima", + "rankPoints" : "770", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 1:31 AM", + "userId" : "5298707", + "content" : "Hi Ryan-san, Thank you for providing the SS time. Is this measurement value or sim value? Best Regards, Kazuki Kitajima" + }, { + "contentId" : "3326511", + "userName" : "Ryan Hu (BSR-MV)", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 2:02 AM", + "userId" : "4779079", + "content" : "Hi Kazuki, Those are ATE char data with three lots silicon." + }, { + "contentId" : "3326518", + "userName" : "Kazuki Kitajima", + "rankPoints" : "770", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 2:10 AM", + "userId" : "5298707", + "content" : "Ryan-san, Understood. Thank you for your support! Best Regards, Kazuki Kitajima" + }, { + "contentId" : "3326557", + "userName" : "Kazuki Kitajima", + "rankPoints" : "770", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 3:09 AM", + "userId" : "5298707", + "content" : "Hi Ryan-san, Sorry, I thought this case is closed, but could you tell me 3 things below which are additional questions from the customer? 1: ATE Input voltage setting: voltage level and start uptime(I assume SS time isn't affected by the Input voltage) 2: Definition of SS time: e.g. start point is 0V to the endpoint is the output voltage 3: SS time variation perspective: The temperature is the most dominant spec for SS? Best Regards, Kazuki Kitajima" + }, { + "contentId" : "3326787", + "userName" : "Ryan Hu (BSR-MV)", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 8:05 AM", + "userId" : "4779079", + "content" : "Hi Kazuki-san, 1. ATE data considered the VIN of 4.5V to 28V, if they input was fixed, the variation should be narrower than the above table range. 2. This is ATE data, not bench data. On bench test, some buck defines 0%-90% of Vo, some buck defines 0%-100% of Vo. 3. Yes, temperature is the main factor the variation." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS54302" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899459.json b/data/json/DLP/899459.json new file mode 100644 index 0000000000000000000000000000000000000000..abdd7eb2518ff310f2799fd251d5fa2424b7a316 --- /dev/null +++ b/data/json/DLP/899459.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899459", + "reporterName" : "Raymond He", + "rankPoints" : "460", + "resolutionStatus" : "", + "ticketName" : "BQ25703A: BQ25703A reference Code", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: BQ25703A dear BQ25703A has reference code for evaluate? thanks in advance", + "partNumber" : " BQ25703A", + "allResponseList" : [ { + "contentId" : "3327440", + "userName" : "Tiger Zhou", + "rankPoints" : "610", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 6:28 PM", + "userId" : "1451791", + "content" : "Hi, Raymond, We developed a BQ25703A-EVM for customer evaluation. It is available on the website. /tool/BQ25703AEVM-732" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25703A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899461.json b/data/json/DLP/899461.json new file mode 100644 index 0000000000000000000000000000000000000000..ab092e9700865dedb8ae1c43509fe7e588b26d28 --- /dev/null +++ b/data/json/DLP/899461.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "899461", + "reporterName" : "Aleksey Makarov", + "rankPoints" : "40", + "resolutionStatus" : "", + "ticketName" : "UCC256301: X-capacitor discharge feature getting turned on while input voltage still present", + "rankName" : "Prodigy", + "replies" : " 5", + "views" : " 59", + "queryText" : "Part Number: UCC256301 Hi! I am trying to develop PSU that converts 220V to 48V, using a design similar to TIDA-010015. I have a problem of instability of PSU - it starts up fine, does switching fine, but may shutdown unexpectedly in a few minutes under no load or under small load (1A). Under small load it turns off faster (though there is not exact time for this). Then it shuts down similar to any fault - switching stops, output voltage drops. Interestingly, it does not get turned on after. output voltage stays down, thougn 400V from PFC is present and UCC256301 kind of tries to turn on - I see voltage rise on VCC pin, I see long pulse on LO pin, but switching does not start again. When in such condition UCC256301 stops switching, I also see a sudden change in HV pin series resistor current (measuring voltage on one 1.5 kOhm resistor of three resistors) - curent from less than 1 mA will change to about 10 mA. I can't be sure if it happens before the switching stops, at the same time or right after as I don't know how to synchronize switching with this current. It happens at around the same time, so I assume it to happen right before switching stops. My undestanding of what's happening: in one random moment of working UCC256301 somehow decides that input voltage 220V absent (even though it is still present) and starts discharging X-capacitor, almost instantly overheats and goes out with OTP fault (wild guess). After that it can't restart due to that overheating, which is renewed by charging VCC voltage (and current through HV pin). I can't verify overheating due to being afraid to short something on PCB without a way to fix firmly thermocouple on UCC256301. I also see zero crossing on HV pin (measuring voltage between HV and GND) while UCC256301 is still switching, happening once in around 700 ms (due to the test current, which is happening with that period, according to datasheet). But if I look at the current on one of HV pin series resistors, I see always the same (kind of) triangular signal as on the left side of the picture above. But perhaps the change in current once in 700 ms is just too small for me to see. So, I guess, my questions are: 1. Is there any activity on HV pin during or after any FAULT condition? Just so we could rule out the possibility of X-cap discharge function not being the cause of PSU shut down. 2. What could be the reasons for X-cap discharge function happening wuth input voltage still present? If that is the case at all. I am also aware of other versions of UCC25630, which do not have this X-cap discharge function, but it would be nice to have it working as it is, without changing to other IC.", + "partNumber" : " UCC256301", + "allResponseList" : [ { + "contentId" : "3326386", + "userName" : "Ulrich Goerke", + "rankPoints" : "11470", + "rankName" : "Genius", + "date" : "Apr 23, 2020 11:28 PM", + "userId" : "637353", + "content" : "Hello Aleksey, Thank you for your interest in the UCC256301 LLC controller. I discussed this issue with another engineer and he suggests that the high HV current that you measured may be due to restart of the IC after VDD voltage fell to the UVLO shutdown threshold. You say your design is \"similar\" to TIDA-010015. This design uses 3 1K resistors in series with HV, your design uses 3 1.5K resistors. This deviation does not account for the restart, but I mention it because there may be other difference between the TIDA design and your design that may be pertinent to the issue. Is it possible for you to provide an up-to-date schematic of your LLC section? There may be more clues as to what is happening there. If you don't wish to make it public, you can send it to my email: ulrich_goerke@. Meanwhile, please probe the VDD voltage and see if the spike in HV current corresponds to the UVLO threshold of the VDD input. If it does, we'll need to find out why the VDD capacitance is inadequate to keep Vvdd above this threshold. Regards, Ulrich" + }, { + "contentId" : "3326671", + "userName" : "Aleksey Makarov", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 6:06 AM", + "userId" : "6241807", + "content" : "Hello Ulrich! Thank you for answer. I sent the schematic to your email. There are some changes to it, marked by crossed out components or value of component. Also note that R78 (RF1 for TIDA-010015) is shorted out now. Also at the time of writing this post resistors R1-R3 (R10, R22, R31 for TIDA-010015) were 1.5 kOhm, but after that I changed them to 1 kOhm each. Following pictures were taken with R1-R3 = 1 kOhm. Also I forgot to change the value on schematic of R43 (R43 for TIDA-010015) - it is actually 182 kOhms, sorry for the mess. I didn't really understood what you meant by \"VDD\" - was it VCC pin or RVCC? Only RVCC has UVLO, as far as I know. So I measured both, there seems to be nothing wrong with them. Blue signal is VCC voltage at the time when switching stops. Yellow signal is SW voltage. Blue signal is RVCC voltage at the time when switching stops. Yellow signal is SW voltage. Measurements have different time scales, but I think that voltage drop enough for UVLO would be noticeable in both scales. There are some spikes on the VCC and RVCC voltages that are probably due to the probes of oscilloscope (I noticed earlier that if i take measurements of, for example, ISNS voltage, it has multiple spikes on it if I measure both ISNS and SW signals, but has far lesser spikes when measuring only ISNS voltage). Blue signal is BLK voltage at the time when switching stops. Yellow is SW voltage. For this measurements i loaded the PSU for 1A and waited for about 15-20 seconds until switching stopped." + }, { + "contentId" : "3326819", + "userName" : "Aleksey Makarov", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 8:40 AM", + "userId" : "6241807", + "content" : "Adding a measurement of ISNS for PSU that stopped switching at the load of 1.1A. Adding a measurement of BW for PSU that stopped switching at the load of 1.1A. Both pictures are the same, one is just with turned off channel 1. Yellow - SW, blue - BW." + }, { + "contentId" : "3327396", + "userName" : "Ulrich Goerke", + "rankPoints" : "11470", + "rankName" : "Genius", + "date" : "Apr 24, 2020 5:54 PM", + "userId" : "637353", + "content" : "Hello Aleksey, Thank you for providing your schematic by email. I se that it is very similar to the TIDA010015 except output voltage is increased to 48V. I assume that the power level is still the same as the TIDA design, at 480W, which means the output current would be cut in half. (I further assume that the transformer T1, although drawn the same as in the TIDA schematic (including incorrect polarity marks), has been modified for the higher voltage, lower current of your design.) Your latest waveforms indicate that the converter appears to be happily converting, then just stop suddenly. I agree, the VCC, RVCC and BLK voltages all look good. In your design, the output current sense circuits involving DA3 and DA1 use the same supporting component values as in the TIDA. Specifically, R8, R23, and R24 set up a ~0.1V threshold to trigger driving V1 optocoupler to adjust the LL burst mode threshold. Based on DA3 gain of 200V/V and 0.0005R sense resistor, this threshold would be met at about 1~1.1A output current. It is my suspicion that your R17 may not be 487K, but something much less and when Iout = ~1A, V1 is driven to adjust LL, but I think it is being pulled low enough to shut off operation. This does not completely match your original symptom descriptions for loads < 1A or no-load, but it may be possible that switching noise or some other effect serves to trigger this threshold. I suggest to depopulate R17, to make sure this circuit has no influence on the LLC controller. Then, if the LLC converter operates successfully for long periods at higher current, you can investigate the current-sense circuits to debug them. If removing R17 does not improve things, then we'll have to think further. For instance, from the primary-side \"point-of view\", all of the thresholds and protections are based on the 24V/20A of the TIDA design. WIth your 48V output, all these thresholds and protections will occur at 1/2 of the current of the TIDA design (except for opto V1,which has direct sensing at R37). If this is not what you intend, then some primary-side parameter adjustments will be needed. Regards, Ulrich" + }, { + "contentId" : "3328552", + "userName" : "Aleksey Makarov", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 9:38 AM", + "userId" : "6241807", + "content" : "Hello, Ulrich. Thank you very much for your help with this. Yes, the DA1, DA3 circuit does exactly that in practice (adjusting burst mode to 1-1.1A). As you can see in pictures below, removing R17 (R70 in TIDA-010015) did not play any role in changing LL/SS voltage. I also remember about current threshold, but for the time being it should not matter, because with components that are placed in circuit now I should be able to get about 7.5A of output, but can't get it working to even half that current. Sometime ago among other problems I already met this issue with current of 1.7A approximately. When I changed R22 (R3 in TIDA-010015) to 150 Ohms, this issue started occuring at around 3A. But while I was debugging it, PCB was fried from working for 7-8 minutes at that current (I waited for the issue to happen). It was with different VT3-VT4 (Q2-Q3 in TIDA-010015), when R19 (R38 in TIDA-010015) was 330 Ohms, and perhaps with another PCB, hard to tell now. I had problems with overshoots on VT3-VT4 (Q2-Q3 in TIDA-010015) due to diodes reverse recovery damage, first \"solved\" with enlarging of value of R19 (R38 in TIDA-010015) (which probably led to heating problem), that really solved with changing MOSFET to the ones with lesser reverse recovery charge. Anyhow, at only slightly different version of my PCB I had way more stable operation at the same load. And also important fact, that by adjusting ISNS resistor we can change current at which circuit operates successfully, though it happens far from predictable values. Perhaps noise could be the reason for ISNS tripping? Filtering capacitor is placed quite far from UCC256301 ISNS pin, but if placed right on top of UCC256301 changes nothing. Also tried putting 22 pF capacitor on top of UCC256301, but didn't see any change, still stops switching prematurely. OVP protection from BW does not seem to trip, BLK seems normal, VCR does not exceed its maximum voltage (look at pictures below), VCC and RVCC are good. My thoughts that it could be: 1. Some feedback problem which leads to UCC256301 stopping switching. Feedback I can't really debug, because TL431 starts oscillating if I try to measure something at R12, R42, R41 (due to noise from wires used to connect oscilloscope to those points or from probe's capacitance). Also if i try to measure signal at R87, output behaves very strangely (similar to oscillating of TL431 probably). Though I can measure FB signal just fine. I would probably like to change TL431 to LMV431, which needs lesser amount of current flowing through it to operate reliably, but it will lead to many changes in feedback circuit, so I don't want to do that without absolute necessity. 2. Strange activity on HV pin. Perhaps, as I first suggested, X-cap discharge gets tripped somehow when 220V are still connected, which leads to overheating of UCC256301, which in turn leads to OTP tripping and stopping of switching? It is the only thing (in my mind at least) that can explain the fact, that, once stopped, switching will not reoccur while 220V are still connected (though VCC gets charged through HV pin all over again and I even see long pulse at LO pin, which usually preceeds switching start). 3. Noise tripping OCP1 or any other FAULT. I am concerned about switching not starting after it stopped as much as I am concerned about it stopping. Perhaps it is a hint, which could lead us to fixing this issue. Particularly considering the fact, that if switching stopped not because of that issue (for example, OCP1 tripping during first few cycles, which happens often), it is then restarted after 1 second. I am loading PSU using electronic load AKTAKOM AEL-8321. Measuring signals with oscilloscope Tektronix TDS2012. LL/SS (blue), SW (yellow) at the moment when switching stopped, which happened at 0.9A (I was slowly turning load up) with R17 still attached. LL/SS (blue), SW (yellow) at the moment when switching stopped, which happened at 1A after 30-60 seconds of work.Happened with R17 absent. At other time at the same conditions stopped switching at 0.2A of load. VCR signal at the moment when switching stopped, which happened at 0.6A. R17 is absent. Regards, Aleksey." + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC256301", "/support/power-management/f/196/tags/TIDA_2D00_010015" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899463.json b/data/json/DLP/899463.json new file mode 100644 index 0000000000000000000000000000000000000000..84b8e77ed3c844193b65b287da86368a7eae16ba --- /dev/null +++ b/data/json/DLP/899463.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "899463", + "reporterName" : "user6005362", + "rankPoints" : "560", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "IWR6843: For IWR6843 ISK z-axis data", + "rankName" : "Intellectual", + "replies" : " 5", + "views" : " 29", + "queryText" : "Part Number: IWR6843 Dear TechnicalSupport I use IWR6843 ISK(ES2.0) following FW was burned. C:\\ti\\mmwave_industrial_toolbox_4_2_1\\labs\\people_counting\\68xx_3D_people_counting\\prebuilt_binaries\\3D_people_count_68xx_demo.bin Install the radar at a height of 2.5m as shown below. I walked a distance of 15m from right below in the y-axis direction. The result is that the point cloud looks above the person's head. Is there any correction applied to the z-axis direction? Also, in 3D People Counting incompany Resource Explorer The name of the folder is ODS. But, In the user guide, the supported device is written as ISK. Is it correct that I can use it for both ODS and ISK? I plan to use the below FW in the future, but I would like to check the validity of the data I have acquired. C:\\ti\\mmwave_industrial_toolbox_4_2_1\\labs\\long_range_people_detection\\68xx_long_range_people_det\\prebuilt_binaries\\long_range_people_det_68xx_demo.bin Best Regards", + "partNumber" : " IWR6843", + "allResponseList" : [ { + "contentId" : "3325848", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 3:31 PM", + "userId" : "5118664", + "content" : "Hi User, This lab supports both ISK and ODS. There is point cloud correction being done - the sensor is given an azimuth tilt (with respect to wall behind it) and an elevation tilt (with respect to the ground). By default, the sensor is assumed to be downtilted 15 degrees, so point cloud is shift 15 degrees up. If the device is not tilted down in your test, points should appear above the person, and get farther above the person as the person gets farther from the device. You can change the downtilt setting in the gui - see the sensor position arguments on the bottom left panel. Regards, Justin" + }, { + "contentId" : "3326558", + "userName" : "user6005362", + "rankPoints" : "560", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 3:09 AM", + "userId" : "6005362", + "content" : "Dear Justin Thank you for your reply. To correct point cloud is in GUI software isn't it? The data for this experiment is a direct TLV packet extraction and analysis from UART. Actually, the radar device was tilted by 10 ° and measured, so as you say, the point cloud shifts downward when corrected. However, considering that my height is 1.7m, it still seems that the point cloud appears above the head. Best Regards" + }, { + "contentId" : "3327221", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 3:43 PM", + "userId" : "5118664", + "content" : "Hi, Actually, the point cloud correction happens on the device before the tracker is run. This is so that the tracker can filter points based on their location. However, you can simply reverse the transform on your collected data set. Since the device is down-tilted 10 degrees and the setting is 15 degrees, try removing 5 degrees from each point's elevation value. There may also be some ghost points, you can try removing points from the set with low SNR. Regards, Justin" + }, { + "contentId" : "3328241", + "userName" : "user6005362", + "rankPoints" : "560", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 3:28 AM", + "userId" : "6005362", + "content" : "Dear Justin Thank you for your reply. Is it right to understand that the point cloud that can be acquired by TLV is already corrected? As you say, it sholud be corrected to 5 ° upwards, so It looks as follow. (The color of the graph represents SNR, and remove low SNR point) Point cloud is shifted higher. I could see the point cloud where the building exists. But, as you say it's SNR is low. So, I also think this is ghost. Could you tell me the location of the source code that actually performs the 15 ° correction process? If I extract only the high SNR and point cloud is not corrected in the device, it is still consistent with the actual movement. I really want to make sure the correction is done on the device. Best Regards" + }, { + "contentId" : "3329007", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 3:26 PM", + "userId" : "5118664", + "content" : "Hi, You can find the correction in \\labs\\common\\src\\dpu\\trackerproc_capon\\src\\trackerproc_3d.c, line 465. Are you setting the elevation tilt as positive or negative? Regards, Justin" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR6843", "/support/sensors/f/1023/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2bIWR6843" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899464.json b/data/json/DLP/899464.json new file mode 100644 index 0000000000000000000000000000000000000000..9f6af10fbe539d305a5a67b5bee920fdf02e33b8 --- /dev/null +++ b/data/json/DLP/899464.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899464", + "reporterName" : "Sanghyun JOO", + "rankPoints" : "140", + "resolutionStatus" : "", + "ticketName" : "BQ25570EVM-206 : BQ25570 Rin Q&A", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 11", + "queryText" : "Part Number: BQ25570EVM-206 I have a question about the Rin on the bq25570 evmboard. I think the value of Rin, the resistance to the VIN_DC terminal on the board, is 2.27k ohms. I want to know exactly how much this is.", + "partNumber" : " BQ25570EVM-206", + "allResponseList" : [ { + "contentId" : "3326075", + "userName" : "Jeff F", + "rankPoints" : "88360", + "rankName" : "Guru", + "date" : "Apr 23, 2020 5:45 PM", + "userId" : "8433", + "content" : "Hi Sanghyun, Are you referring to the resistance from VIN_DC pin to GND when VSTOR=0V? We haven't characterized that value. Keep in mind, there is an NFET from VIN_DC to ground that turns on if VIN_DC=VMPP > VBAT_OV to prevent over-voltage on the storage element. Regards, Jeff" + } ], + "tags" : [ "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2b%2bBQ25570", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2b%2bplease%2bhelp", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2bplease%2bhelp", "/support/power-management/f/196/tags/BQ25570", "/support/power-management/f/196/tags/BQ25570EVM_2D00_206" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899467.json b/data/json/DLP/899467.json new file mode 100644 index 0000000000000000000000000000000000000000..f8a7a326559f6016ba140b31b06fa3af7006865b --- /dev/null +++ b/data/json/DLP/899467.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "899467", + "reporterName" : "Spec Pro", + "rankPoints" : "40", + "resolutionStatus" : "Resolved", + "ticketName" : "LMZM33606: Circuit designed to output 12V is only outputting 1V", + "rankName" : "Prodigy", + "replies" : " 5", + "views" : " 53", + "queryText" : "Part Number: LMZM33606 Hi All, This is my first step down converter design using SMD parts. So I'm not sure whether its the design or if I am doing something wrong during mounting the SMD parts with a hot air gun. Hope someone can give some advice and point me in the right direction. The circuit is designed to output 12V from a 15V input (well that was the intention anyway). Reading the voltage output on the scope only indicates 1V. I've attached the schematic, board, BOM and also scope readout for reference. Greatly appreciate the help!", + "partNumber" : " LMZM33606", + "allResponseList" : [ { + "contentId" : "3326082", + "userName" : "Jimmy Hua", + "rankPoints" : "17640", + "rankName" : "Genius", + "date" : "Apr 23, 2020 5:51 PM", + "userId" : "4798049", + "content" : "Hi Spec, Can you check if FB is shorted to VOUT? The internal voltage reference is 1V and if FB is somehow shorted to VOUT it can force VOUT to be 1V as well. Try probing your board and reading out the voltage measurements to check for any abnormal voltages. Also can you try removing the CFF capacitor and retest board operation? Lastly if you can provide a waveform of VIN, VOUT, and SW that would help troubleshoot the problem. The SW can be accessed on the side of the power module through the SW pins (1-6, 31). Regards, Jimmy" + }, { + "contentId" : "3326625", + "userName" : "Spec Pro", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 5:00 AM", + "userId" : "6248785", + "content" : "Dear Jimmy, Thanks for the detail pointers. When I set the multimeter to continuity test and probe the FB and VOUT points the sound emitted indicated that those two points are connected. On my actual board as well as my design the FB is connected indirectly to the VOUT through the RFBB, CFF and RFBT and the VOUT plane which the VOUT is connected to. Is this why the FB and VOUT are shorted? When I look back at the reference design in the datasheet it does appear that the FB is connected to VOUT through those resistors and caps. I didn't use a AGND plane in my design so everything is connected to the PGND, perhaps that is why the short between FB and VOUT is happening? FYI, on another prototype the VOUT was fluctuating between 0 V and 2.xx V and did go up to 12V at one point but mostly stayed between 0, 1.xx and 2.xx V. Wonder if this is indicative of the same problem above? Thanks again for your help and looking forward to your feedback. Best Regards, S." + }, { + "contentId" : "3326970", + "userName" : "Spec Pro", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 12:03 PM", + "userId" : "6248785", + "content" : "Hi, Jimmy. Here are the waveforms: 1) VOUT: 2) VIN: 3) SW: SW Frequency of peak to peak SMD Solder Paste - just wondering if the solder paste is fully melting?" + }, { + "contentId" : "3327674", + "userName" : "Jimmy Hua", + "rankPoints" : "17640", + "rankName" : "Genius", + "date" : "Apr 24, 2020 11:38 PM", + "userId" : "4798049", + "content" : "Hi Spec Pro, Looking the exposed pads of the power module on your PCB, it looks like the solder paste has not completely melted and reflowed properly. A proper reflow of the solder paste should result in the thermal pads being shiny and metallic looking. I would suspect that the device that was on your board didn't have all pins connected and would suggest running the reflow at a hotter temperature to ensure the solder paste is completely dissolved and properly coats the exposed pads. Can you try doing this with a new unit and retest for operation? Regards, Jimmy" + }, { + "contentId" : "3328173", + "userName" : "Spec Pro", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 26, 2020 11:54 PM", + "userId" : "6248785", + "content" : "Paste is now fully melted and the board is able to convert 15V to 12V. Turns out that heating both sides of the board is necessary to get the paste on the hidden pads to melt as well. Thanks for your help Jimmy!" + } ], + "tags" : [ "/support/power-management/f/196/tags/LMZM33606" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899473.json b/data/json/DLP/899473.json new file mode 100644 index 0000000000000000000000000000000000000000..accb00b3ef107f8ca7a7bd780dfb0eaac61d7eab --- /dev/null +++ b/data/json/DLP/899473.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "899473", + "reporterName" : "Kok Khuan P'ng", + "rankPoints" : "430", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC256404: Excel Design Spreadsheet", + "rankName" : "Intellectual", + "replies" : " 4", + "views" : " 30", + "queryText" : "Part Number: UCC256404 Hi TI, I have several questions on UCC25640x Design Calculator as below. For LL/SS, why actual Vssinit in cell - 'C208' is 0V? Although it is Option 5 where LL/SS pin is pulled down by internal 1.2kOhm, it should not get 0V. With 13V of Vrvcc, the actual Vssinit = 13 x 1.2k//316k / (1.2k//316k + 549k) = 0.0282V. Can you enable the \"table and calculation\" tab? I am in a 'black box' in LL/SS calculation. Issup value in cell - 'C197' is 37.5uA while it is 36uA in its datasheet. Which value should we follow? 4. Equation in cell - 'C193' involves actual OVP value, which is incorrect, right? The actual OVP value in cell - 'C192' should be the Upper resistor value in cell - 'C188', right? 5. Would it be OK if switching frequency at no load based on Mg_ꚙ on Mg vs fN curve is more than maximum switching frequency since it would enter burst mode at low load? 6. Is UCC256404 max switching frequency 350kHz? Regards, KK", + "partNumber" : " UCC256404", + "allResponseList" : [ { + "contentId" : "3326154", + "userName" : "Ulrich Goerke", + "rankPoints" : "11470", + "rankName" : "Genius", + "date" : "Apr 23, 2020 7:07 PM", + "userId" : "637353", + "content" : "VHello KK, Thank you for your interest in the UCC256404 LLC controller. Here are responses to your questions: 1. It was deemed that the Vssinit voltage was close enough to zero to simply initialize C208 to 0V. 2. The hidden tab contains background calculations and is not well organized because it was not expected to be shown. If you have a question about some specific LL/SS calculation we can help you with that. 3. The nominal value of Issup was originally 37.5uA, but changed to 36uA before release. The calculator tool missed this change. 36uA is the correct value. 4. You are correct; there is an erroneous cell reference. It should be to the Upper resistor in cell C188. 5. Yes, this is okay. 6. The UCC25640x series is capable of switching up to 1Mhz, but usually is used lower than this. A full-load steady-state frequency of 350kHz is comfortable upper design target limit to allow for higher frequencies during start-up, light loads, and transients. Thank you for helping us find these errors. We'll be upgrading the calculator tool shortly, though I cannot predict when the new version will become available. Hopefully very soon. Regards, Ulrich" + }, { + "contentId" : "3326741", + "userName" : "Kok Khuan P'ng", + "rankPoints" : "430", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 7:07 AM", + "userId" : "1842892", + "content" : "Hi Ulrich, Thank you for your answers. I have further question on previous item-1 and other questions With Vssinit = 0V, VTH value cannot be acquired according to above equation captured from UCC25640x datasheet (Equation-76). Is Vssinit= 0V correct? Since VTH value cannot be acquired, LL/SS Upper & Lower Resistance values cannot be acquired according to Equation-78 and -79 in its datasheet. If Vssinit is not 0V, what should we do to get LL/SS Upper & Lower Resistance values for Option-5? The suggested range is 3V and 4.5V according to its datasheet instead of between 3V and 5.5V according tocompany Design Calculator for VCR pin voltage peak to peak. Which is correct? The common mode voltage of VCP pin from datasheet is 3V while is 3.02V from Design Calculator. Which is correct? Regards, KK" + }, { + "contentId" : "3327435", + "userName" : "Ulrich Goerke", + "rankPoints" : "11470", + "rankName" : "Genius", + "date" : "Apr 24, 2020 6:22 PM", + "userId" : "637353", + "content" : "Hello KK, 1. I've been informed that the calculations for the Upper and Lower LL/SS resistors proceeds with the value that Vssinit would be as if Option 5 was not selected. 2. 3V to 5.5V is okay for the suggested range. 3. The Vcm is 3.00V. The typical value in the datasheet specification table was adjusted slightly from a previous 3.02V after the calculator had been developed. This 20mV offset from typical makes less than 1% difference in the results. Regards, Ulrich" + }, { + "contentId" : "3327797", + "userName" : "Kok Khuan P'ng", + "rankPoints" : "430", + "rankName" : "Intellectual", + "date" : "Apr 25, 2020 7:13 AM", + "userId" : "1842892", + "content" : "Hi Ulrich, Cancompany share the calculation details on cells - 'C202, 'C204, 'C205', 'C208' and 'C209'? Regards, KK" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC256404" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899475.json b/data/json/DLP/899475.json new file mode 100644 index 0000000000000000000000000000000000000000..93ab293e121400cba139141f65e6709b5a3543d8 --- /dev/null +++ b/data/json/DLP/899475.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899475", + "reporterName" : "user5263859", + "rankPoints" : "160", + "resolutionStatus" : "", + "ticketName" : "AWR1642: AWR1642 Close range index jamming", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 23", + "queryText" : "Part Number: AWR1642 HI: in the 2d ffd , we found some jamming the the index 0-4 . How can we reduce it？", + "partNumber" : " AWR1642", + "allResponseList" : [ { + "contentId" : "3325946", + "userName" : "Cesar", + "rankPoints" : "52960", + "rankName" : "Guru", + "date" : "Apr 23, 2020 4:18 PM", + "userId" : "20288", + "content" : "Hi, Is this observed on a custom board? Thank you Cesar" + }, { + "contentId" : "3328411", + "userName" : "Vivek Dham", + "rankPoints" : "30420", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 7:17 AM", + "userId" : "333578", + "content" : "Hello , Close to DC bins there will be signal present due to Tx to Rx antenna coupling. You could possibly try to cancel this signal in your processing by reading the coupled signal and cancelling this signal from all data after that. Regards, Vivek" + } ], + "tags" : [ "/support/sensors/f/1023/tags/AWR1642", "/support/sensors/f/1023/tags/AWR1642%2b%2bjamming", "/support/sensors/f/1023/tags/awr20_5F00_p2_5F00_hwa20_5F00_other" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899480.json b/data/json/DLP/899480.json new file mode 100644 index 0000000000000000000000000000000000000000..c97a3089e520e7ddfe5acc464cfe3f44ea2ec6ee --- /dev/null +++ b/data/json/DLP/899480.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899480", + "reporterName" : "Geert Jacobs", + "rankPoints" : "110", + "resolutionStatus" : "", + "ticketName" : "TPS65381A-Q1: AMUX signal order problem", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 32", + "queryText" : "Part Number: TPS65381A-Q1 We are testing the AMUX signals on our own board (TMS570LS1224 + TPS65381A). When testing the AMUX voltages in the order as recommended in the TPS datasheet (A.8 – A.7 – A.1 – A.2 – A.3 – A.5 – A.6 – A.4.), we see that A1 (VDD5) and A2 (VDD6) are not measured within range, even with very large stabilization delays to have the voltages settle. However, when testing testing the A1 (VDD5) or the A2 individually(VDD6) in single measurement (so no in a sequential measurement), they are in range. We have disabled pullups/pulldown on the digital input that is also connected. Measurements before and after our AMUX RC filter are identical, so the filter seems to have no negative influence. Is there a reason why the order of measurement can have this effect?", + "partNumber" : " TPS65381A-Q1", + "allResponseList" : [ { + "contentId" : "3326632", + "userName" : "Kevin LaRosa", + "rankPoints" : "13725", + "rankName" : "Genius", + "date" : "Apr 24, 2020 5:14 AM", + "userId" : "3460140", + "content" : "Hello Geert, Our TPS65381A-Q1 engineer will respond tomorrow." + }, { + "contentId" : "3327762", + "userName" : "Kevin LaRosa", + "rankPoints" : "13725", + "rankName" : "Genius", + "date" : "Apr 25, 2020 4:18 AM", + "userId" : "3460140", + "content" : "Hi Geert, Sorry for the delay here. What voltage are you measuring during A.1 and A.2 test after A.7? In particular, is it measuring higher than expected? Does it happen when doing just A.7 -> A.1 or does it require A.8 -> A.7 -> A.1? Could you provide a scope shot the pin to show the transition from A.7 --> A.1?" + }, { + "contentId" : "3328843", + "userName" : "Geert Jacobs", + "rankPoints" : "110", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 2:02 PM", + "userId" : "5232117", + "content" : "Hello Kevin, These are two screenshots of the A8-A7-A1-.... sequence. Voltages In green: Voltages in yellow: We will get an A7-A1 measurement to you tomorrow. Regards, Geert" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS65381A_2D00_Q1", "/support/power-management/f/196/tags/TMS570LS1224" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899484.json b/data/json/DLP/899484.json new file mode 100644 index 0000000000000000000000000000000000000000..f5d0bcb8dd4b42d5916989d62c164cee08958fb8 --- /dev/null +++ b/data/json/DLP/899484.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "899484", + "reporterName" : "Peter Tseng", + "rankPoints" : "2755", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS54201: 10KHz noise of TPS54201 output .....", + "rankName" : "Expert", + "replies" : " 6", + "views" : " 29", + "queryText" : "Part Number: TPS54201 Dear Sirs, My customer found their TPS54201 output will have 10KHz noise sound. The sound seem came from inductor or capacitor! Below is schematics and waveform. Customer use DC 3.3V for PWM input for test now. Can you help to advice which point we can pay attention? Thanks.", + "partNumber" : " TPS54201", + "allResponseList" : [ { + "contentId" : "3325490", + "userName" : "Sean Zhou", + "rankPoints" : "17030", + "rankName" : "Genius", + "date" : "Apr 23, 2020 10:33 AM", + "userId" : "3704", + "content" : "Hi Peter, So you have used a pure DV voltage level instead of PWM signal to dimming? You can try to increase the capacitor value between LEDs. What's the cap value that you used? It is not clear in the picture. Another suggestion is increasing the cap value connected to FB pin. BR Sean" + }, { + "contentId" : "3328192", + "userName" : "Sean Zhou", + "rankPoints" : "17030", + "rankName" : "Genius", + "date" : "Apr 27, 2020 1:07 AM", + "userId" : "3704", + "content" : "Hi Peter, Is there any update? Have you found the root cause? BR Sean" + }, { + "contentId" : "3328330", + "userName" : "Peter Tseng", + "rankPoints" : "2755", + "rankName" : "Expert", + "date" : "Apr 27, 2020 6:04 AM", + "userId" : "1806737", + "content" : "Hi Sean, 1. update clear schematics. 2. already have 2x22uF caps in parallel between LED. what value will you suggest to use? (in red circle) 3. had test 1uF cap connect to FB pin but still fail! Is there any suggest else? Thanks." + }, { + "contentId" : "3328492", + "userName" : "Sean Zhou", + "rankPoints" : "17030", + "rankName" : "Genius", + "date" : "Apr 27, 2020 8:40 AM", + "userId" : "3704", + "content" : "Hi Peter, Since there is no 10kHz signal inside of TPS54201, I guess it may come from the power supply, so can you try with a 12V DC power to test? And what's the frequency of the PWM dimming signal? It is 10kHz? We recommend >50kHz. BR Sean" + }, { + "contentId" : "3328508", + "userName" : "Peter Tseng", + "rankPoints" : "2755", + "rankName" : "Expert", + "date" : "Apr 27, 2020 8:58 AM", + "userId" : "1806737", + "content" : "Hi Sean, OK! i will check with customer and make sure the 12V input is from DC power supply and try again! BTW, the PWM signal that customer use for testing now is pure DC level.(3.3V)." + }, { + "contentId" : "3328535", + "userName" : "Sean Zhou", + "rankPoints" : "17030", + "rankName" : "Genius", + "date" : "Apr 27, 2020 9:20 AM", + "userId" : "3704", + "content" : "Hi Peter, Yes, please try again and give me an update later. BR Sean" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS54201" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899485.json b/data/json/DLP/899485.json new file mode 100644 index 0000000000000000000000000000000000000000..b8cc9b131678546787a6fb117fe28e1ec9985a07 --- /dev/null +++ b/data/json/DLP/899485.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "899485", + "reporterName" : "Ayushya Pare", + "rankPoints" : "50", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "OPT3101EVM: OPT3101 EVM Emitter modulation", + "rankName" : "Prodigy", + "replies" : " 6", + "views" : " 32", + "queryText" : "Part Number: OPT3101EVM Hello Support, I am using an OPT3101 EVM module and want to know if the emitted light signal can in any way be modulated from my side. Is it possible to emit sinusoidally modulated light signal from the emitter? Even with external modulation? Thanks in advance. best regards, Ayushya", + "partNumber" : " OPT3101EVM", + "allResponseList" : [ { + "contentId" : "3326029", + "userName" : "Alex Bhandari-Young", + "rankPoints" : "15670", + "rankName" : "Genius", + "date" : "Apr 23, 2020 5:16 PM", + "userId" : "4691324", + "content" : "Hi, What is the reason for doing this? OPT3101 already modulates the emitter with a 10MHz square wave. Are you trying to add a lower frequency component on top of this? Can you also give some background on your application and use-case here for me to better understand? Best, Alex" + }, { + "contentId" : "3326033", + "userName" : "Ayushya Pare", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 5:21 PM", + "userId" : "6320003", + "content" : "Hello Alex, Thanks for your reply. I want to modulate the emitter with a sinusoidal wave, although with the same amplitude and frequency. Best, Ayushya" + }, { + "contentId" : "3326037", + "userName" : "Alex Bhandari-Young", + "rankPoints" : "15670", + "rankName" : "Genius", + "date" : "Apr 23, 2020 5:22 PM", + "userId" : "4691324", + "content" : "Hi, You cannot change the 10MHz modulation to a sine wave. Best, Alex" + }, { + "contentId" : "3327138", + "userName" : "Ayushya Pare", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 2:41 PM", + "userId" : "6320003", + "content" : "Hello Alex, Thanks for your reply. So, is there any way that I can attempt to emit a sinusoidally modulated light signal from the LED and then receive the reflected light (which will also be sine) by the Photodiode? Any assistence is hugely appreciated. Best regards Ayushya" + }, { + "contentId" : "3327430", + "userName" : "Alex Bhandari-Young", + "rankPoints" : "15670", + "rankName" : "Genius", + "date" : "Apr 24, 2020 6:18 PM", + "userId" : "4691324", + "content" : "Hi Ayushya, Is this question different from what I answered above? If so I will need more details of what you are trying to do. Best, Alex" + }, { + "contentId" : "3327528", + "userName" : "Ayushya Pare", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 8:29 PM", + "userId" : "6320003", + "content" : "Hi Alex, thanks again. My project is based on distance measurement using time of flight. In this, an emitter transmits a sinusoidally modulated light signal in NIR range, and based on the phase shift of the reflected sinusoidal light signal, the distance is measured. There is an algorithm to be developed which will remove the Multipath Interference from the received light signal. See image : I was initially hoping that the OPT3101EVM might be useful in collecting the received signal from the sensor and also that the LED can be supplied with a sinusoidal signal. Please let me know if there is more information I can provide on this. Thanks and regards Ayushya" + } ], + "tags" : [ "/support/sensors/f/1023/tags/OPT3101EVM", "/support/sensors/f/1023/tags/OPT3101" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899486.json b/data/json/DLP/899486.json new file mode 100644 index 0000000000000000000000000000000000000000..123afff4b839c54618156199cb24dda172b41833 --- /dev/null +++ b/data/json/DLP/899486.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899486", + "reporterName" : "Akash Gupta1", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS7A4501-SP: Stability and Power Dissipation", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 16", + "queryText" : "Part Number: TPS7A4501-SP 1) I have put 10uF capacitors at the input and output end of the LDO TPS7A4501-SP. What value of capacitor (between Vout and ADJ) is required to get better phase margin and reduced noise? 2) What is the maximum power dissipation of the device TPS7A4501-SP?", + "partNumber" : " TPS7A4501-SP", + "allResponseList" : [ { + "contentId" : "3325598", + "userName" : "Wade Vonbergen", + "rankPoints" : "56470", + "rankName" : "Guru", + "date" : "Apr 23, 2020 12:48 PM", + "userId" : "8007", + "content" : "Akash, 1) There is a section in the datasheet that discusses compensation and the calculations associated with it for your particular requirements. See 9.2.2.2. 9.2.2.1 also has good information regarding the choice of capacitor. 2) There are several sections of the datasheet that are pertinent for managing thermal performance of the device. Key points. Recommended operating junction maximum temperature is 125c. So, this is the value you must design to to insure device is operating under warranted specifications. The HKU packaged device has a thermal landing that is necessary to electrically and thermally connect to the board. This improves the devices ability to dissipate heat to the board. There is a table of thermal properties for each of the 2 package types in section 7.4. Use the appropriate value depending on your package. From this table, use the information in section 11.3. to calculate the maximum junction temperature with your configuration. (Vin, Vout, Iout, case temp, ...) This will take into account the amount of power that is required to be dissipated internally due to device being a linear regulator. Additionally, there is general information on the thermal metrics and calculations in this application note. This application note is linked in the datasheet in the Thermal information table section 7.4. If this answers your question, please click \"This Resolved My Issue\" Regards, Wade" + }, { + "contentId" : "3328599", + "userName" : "Akash Gupta1", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 10:49 AM", + "userId" : "6314535", + "content" : "In datasheet section 9.2.2.2, the second pole and zero frequency is calculated using C3=470pF. But how to know the phase margin is improved using 470pF capacitor and what is the first pole frequency. Also how it reduce the output noise? How to know that 470pF will work or any other value is required?" + }, { + "contentId" : "3329325", + "userName" : "Wade Vonbergen", + "rankPoints" : "56470", + "rankName" : "Guru", + "date" : "Apr 27, 2020 6:30 PM", + "userId" : "8007", + "content" : "Akash, The datasheet does not go into detail on optimization of the Cff capacitance. This application note describes equation to optimize Cff based on centering the pole an zero around the non Cff response. See With respect to quantifying the noise improvement. I do not have any data that would help quantifying Cff selection for improved noise response. An estimate of phase margin improvement can be ascertained by utilizing the WCA models and fine tuning the Cff as most appropriate for your design. The WCA model for pspice is available in the product folder. If this answers your question, please click \"This Resolved My Issue\" Regards, Wade" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS7A4501_2D00_SP" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899489.json b/data/json/DLP/899489.json new file mode 100644 index 0000000000000000000000000000000000000000..7d52f9efebe89c10dfbff29354cecadff94b5cd8 --- /dev/null +++ b/data/json/DLP/899489.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "899489", + "reporterName" : "Yue TANG", + "rankPoints" : "4690", + "resolutionStatus" : "Resolved", + "ticketName" : "4 direction detector consultation", + "rankName" : "Expert", + "replies" : " 5", + "views" : " 62", + "queryText" : "Hi, My customer require an alternative solution for below 4 direction detectors. Can you please suggest ifcompany has a similar solution? thanks. RPI-1035_tilt_Sensor.pdf", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3326188", + "userName" : "AmandaN", + "rankPoints" : "11910", + "rankName" : "Genius", + "date" : "Apr 23, 2020 7:54 PM", + "userId" : "5084791", + "content" : "Hello, Generally mmWave sensors are used for sensing the environment around the sensor for example tracking motion of cars or people. Generally it would not be used determine the tilt or orientation of the sensor itself. Amanda" + }, { + "contentId" : "3326250", + "userName" : "JD Crutchfield", + "rankPoints" : "18390", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 9:02 PM", + "userId" : "1786037", + "content" : "Hey Yue, Honestly, from that datasheet I can't even tell what a 4 direction detector sensor is. What is the application? Thanks, JD" + }, { + "contentId" : "3326362", + "userName" : "JD Crutchfield", + "rankPoints" : "18390", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 10:54 PM", + "userId" : "1786037", + "content" : "Hey Yue, After some searching, I was able to find this page that explains what a 4 direction sensor does: https://www.parallax.com/product/28036 Basically, it just detects what side is \"Up.\" I don't thinkcompany makes anything like this, but I'll try and loop the sensing groups in to confirm. Thanks, JD" + }, { + "contentId" : "3326570", + "userName" : "Yue TANG", + "rankPoints" : "4690", + "rankName" : "Expert", + "date" : "Apr 24, 2020 3:30 AM", + "userId" : "1993972", + "content" : "for vacuum cleaner." + }, { + "contentId" : "3328258", + "userName" : "Arjun_Prakash", + "rankPoints" : "3090", + "rankName" : "Expert", + "date" : "Apr 27, 2020 3:55 AM", + "userId" : "1287488", + "content" : "Hello Yue, Its a bot unclear on what is needed here. Based on the little information if the requirement is for a vacuum cleaner. I am not sure if you are talking about a robotic vacuum cleaner. If its yes then I recommend a technote on using ultrasonics /lit/an/slaa909/slaa909.pdf?ts=1587959566069 for object detection. but on the previous research I would be more inclined towards an optical solution." + } ], + "tags" : [ ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899490.json b/data/json/DLP/899490.json new file mode 100644 index 0000000000000000000000000000000000000000..36b1e0dd25cdef4422f63eb9d05e7c318001ad09 --- /dev/null +++ b/data/json/DLP/899490.json @@ -0,0 +1,79 @@ +{ + "ticketNumber" : "899490", + "reporterName" : "Y.Ottey", + "rankPoints" : "3030", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS61087: LED PWM dimming using TPS61087", + "rankName" : "Genius", + "replies" : " 8", + "views" : " 38", + "queryText" : "Part Number: TPS61087 Dear all I would like to ask questions about LED PWM dimming using TPS61087. Our customer is trying to do LED dimming by inputting a 200Hz pulse signal to the EN pin as in the following application example (listed in the TPS61087 data sheet). I would like to know about the following contents. ①By checking the above circuit example, I think that the above dimming is possible. Is this possible even if the conditions such as input / output voltage change? * By the way, our customers are trying to implement under the following conditions. Vin = 3.0V-4.2V Vout = 6.5V (or 6.0V) Iout = 1.0A Fsw = 650kHz ② Is there any concern when dimming the LED by inputting a pulse signal to the EN pin as in the above circuit example? （I think it is necessary to pay attention to the responsiveness such as making the value of Rcomp larger than the calculated value of the data sheet.） Best Regards, Y.Ottey", + "partNumber" : " TPS61087", + "allResponseList" : [ { + "contentId" : "3326457", + "userName" : "Helen chen", + "rankPoints" : "32965", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 1:13 AM", + "userId" : "4197150", + "content" : "Dear Sir, It is very corner. They need to choose a very small sense resistor Like 0.1-0.2 ohm. So can't output such big current." + }, { + "contentId" : "3328195", + "userName" : "Y.Ottey", + "rankPoints" : "3030", + "rankName" : "Genius", + "date" : "Apr 27, 2020 1:24 AM", + "userId" : "6052437", + "content" : "Dear Helen Thank you for your reply. \"It is very corner. They need to choose a very small sense resistor Like 0.1-0.2 ohm. So can't output such big current.\" If you place Rsense as you say, what is the maximum output current that is possible under the following conditions? Vin = 3.0V-4.2V Vout = 6.5V (or 6.0V) Fsw = 650kHz Regards, ]Y.Ottey" + }, { + "contentId" : "3328299", + "userName" : "Helen chen", + "rankPoints" : "32965", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 5:24 AM", + "userId" : "4197150", + "content" : "Dear Sir, It is 1A maximum based on >85% efficiency. If the efficiency is lower than 85% because of bad layout , poor inductor, then only 0.8- 0.9A maximum depend on the efficiency. You can refer to thecompany design PMP15037 for the circuit design." + }, { + "contentId" : "3328459", + "userName" : "Y.Ottey", + "rankPoints" : "3030", + "rankName" : "Genius", + "date" : "Apr 27, 2020 7:57 AM", + "userId" : "6052437", + "content" : "Dear Helen Thank you for your reply. I have additional questions. \" They need to choose a very small sense resistor Like 0.1-0.2 ohm\" You are saying that you need to place 0.1 to 0.2mΩ on Rsense to output 1A as above. However, if 1A flows to Rsense 0.1 to 0.2Ω, the voltage applied to the FB pin will be 0.1 to 0.2V. This conflicts with the FB pin voltage of TPS61087 typ 1.238V. Please explain why Rsense needs 0.1 to 0.2Ω. (I would be glad if you could share any reference material.) Regards, Y.Ottey" + }, { + "contentId" : "3328583", + "userName" : "Helen chen", + "rankPoints" : "32965", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 10:24 AM", + "userId" : "4197150", + "content" : "Please check the calculation in the PMP15037. They need to change the circuit similar to PMP15037. Need to re calculate the dividing resistor and Rlimit." + }, { + "contentId" : "3329764", + "userName" : "Y.Ottey", + "rankPoints" : "3030", + "rankName" : "Genius", + "date" : "Apr 28, 2020 2:14 AM", + "userId" : "6052437", + "content" : "Dear Helen Thank you for your reply. I have a question about the calculation in PMP15037. 1. I think that the dimming at the EN pin this time can be calculated by the resistance value in the circuit example below. Is this correct? (I think that R12 = Rlimit and Rs = Rsense.) ※ There was no circuit example for dimming with the EN pin on the PMP15037. If the question in 2.1. Is OK, there is no R11 in the application example in the datasheet. Do you need this resistance? Also, what happens to the calculation of R12 and Rs when R11 is not needed? 3. Is the Rsense value as small as 0.1 to 0.2Ω when the LED in the circuit diagram of the TPS61087 data sheet Figure.21 is replaced with one LED with Vf = 6.15V and If = 1A?" + }, { + "contentId" : "3329813", + "userName" : "Helen chen", + "rankPoints" : "32965", + "rankName" : "Mastermind", + "date" : "Apr 28, 2020 3:08 AM", + "userId" : "4197150", + "content" : "Hi Ottey, The aim of PMP15037 is to reduce the loss across the Rsense, without R11, the voltage across Rs should reach Vref in order to regulate. So Rsense need to be higher than 1 ohm, results in a >1W loss with 1A LED current. You can ask the customer read the PMP15037 in detail, it is easy to be understand. If they have MCU generate PWM signal, it is better to use the method in PMP15037. It has nothing to do with the one LED or multi LED ." + }, { + "contentId" : "3329909", + "userName" : "Y.Ottey", + "rankPoints" : "3030", + "rankName" : "Genius", + "date" : "Apr 28, 2020 5:19 AM", + "userId" : "6052437", + "content" : "Hi Helen Thank you for your reply. Let me check one thing. I understand that the purpose you proposed the PMP15037 is to reduce losses in Rsense. Is Rsense = 0.1-0.2Ω that you were doing recognized as the value after placing R11 and R12 in the circuit diagram below? If it is not necessary to consider loss (efficiency), is there any problem if Rsense is set to 1Ω or more and a 200kHz pulse is input to the EN pin without R11 and R12?" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS61087" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899493.json b/data/json/DLP/899493.json new file mode 100644 index 0000000000000000000000000000000000000000..45dac03dac4ac3d851ace63e89fb7d49a03eee11 --- /dev/null +++ b/data/json/DLP/899493.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899493", + "reporterName" : "Kami Huang60", + "rankPoints" : "2370", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS92602-Q1: TPS92602 car light design", + "rankName" : "Expert", + "replies" : " 3", + "views" : " 33", + "queryText" : "Part Number: TPS92602-Q1 Dear Sir/Ms. My customer ask forcompany reference design(Turn Key Solution) for following 2 spec. Spec. 1 (Head Light , High Beam + Low Beam) Input: 9V~16V, 13.5V Normal , Chanel 1 Vout 13.5V/1A Chanel 2 Vout 13.5V/0.8A Channel 1 Low Beam Spec. parameter unit LED VF TYP. 6.75 V LED VF TYP. 1 A LED Total # 2 PCS LED Steam 2 PCS LED Parallel 1 PCS Total Output Voltage 13.5 V Output Current 1 A Output Power 13.5 W Typical Input Voutage 13.5 V Channel 2 High Beam Spec. parameter unit LED VF TYP. 6.75 V LED VF TYP. 0.8 A LED Total # 2 PCS LED Steam 2 PCS LED Parallel 1 PCS Total Output Voltage 13.5 V Output Current 0.8 A Output Power 10.8 W Typical Input Voutage 13.5 V Spec. 2 (Head Light, DRL & Position) Input: 9V~16V, 13.5V Normal , Chanel 1: Vout 46.2V/0.1A PWM Dimming to 0.02A Chanel 2: Vout 64.2V/0.1A PWM Dimming to 0.02A Channel 1 DRL/Position Driver parameter unit LED VF TYP. 3.3 V LED Current TYP. (PWM DIMMING) 0.1/0.02 A LED Total # 14 PCS LED Steam 14 PCS LED Parallel 1 PCS Total Output Voltage 46.2 V Output Current 0.1/0.02 A Output Power 4.62/0.924 W Typical Input Voutage 13.5 V Channel 2 DRL/Position Driver parameter unit LED VF TYP. 3.3 V LED Current TYP. (PWM DIMMING) 0.1/0.02 A LED Total # 14 PCS LED Steam 14 PCS LED Parallel 1 PCS Total Output Voltage 46.2 V Output Current 0.1/0.02 A Output Power 4.62/0.924 W Typical Input Voutage 13.5 V Do you have suitable design? Best Regards, Kami Huang", + "partNumber" : " TPS92602-Q1", + "allResponseList" : [ { + "contentId" : "3325529", + "userName" : "Frank Qiu", + "rankPoints" : "3995", + "rankName" : "Expert", + "date" : "Apr 23, 2020 11:29 AM", + "userId" : "6106883", + "content" : "We don’t have similar reference design. But customer could reference as a example" + }, { + "contentId" : "3328037", + "userName" : "Kami Huang60", + "rankPoints" : "2370", + "rankName" : "Expert", + "date" : "Apr 26, 2020 8:43 AM", + "userId" : "5177582", + "content" : "Hello Frank, Do you have TPS92602 reference design of SEPIC/Buck-boost topology? I may suggest customer base on the reference design? Best Regards, Kami Huang" + }, { + "contentId" : "3328194", + "userName" : "Frank Qiu", + "rankPoints" : "3995", + "rankName" : "Expert", + "date" : "Apr 27, 2020 1:15 AM", + "userId" : "6106883", + "content" : "Kami, We don't have a reference design, please reference the circuit below" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS92602_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899501.json b/data/json/DLP/899501.json new file mode 100644 index 0000000000000000000000000000000000000000..b330aba52c853f6e7f579d13784f6fc9317669ac --- /dev/null +++ b/data/json/DLP/899501.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899501", + "reporterName" : "Isabel Driscoll", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "IWR1443BOOST: Heart rate monitoring in small animals", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 25", + "queryText" : "Part Number: IWR1443BOOST Hi, I recently came across your mmWave for vital signs monitoring. Thecompany general support team suggested I ask my question here. I am a PhD student at the University of Zurich studying wild meerkats. I was wondering if this technology could potentially be used as part of my research to record meerkats heart rate in the field? Ideally the device could be incorporated into a collar worn by the individual. I look forward to hearing from you. All the best, Isabel", + "partNumber" : " IWR1443BOOST", + "allResponseList" : [ { + "contentId" : "3326321", + "userName" : "Akash Gondalia", + "rankPoints" : "39385", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 10:16 PM", + "userId" : "4768107", + "content" : "Hi Isabel, It seems very challenging.The Vital Signs Monitoring Lab on thecompany Resource Explorer requires the subject to be seated still at a distance less than 1.5 m from the sensor. Would you be able to at least have the meerkats be completely still? Regards, AG" + }, { + "contentId" : "3326791", + "userName" : "Isabel Driscoll", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 8:10 AM", + "userId" : "6330285", + "content" : "Hi Ag, Thank you very much for your reply. As they are wild and this would be conducted in the field, it would not be possible to keep them still. The ideal scenario would be that the meerkats could wear a device and it capture their heart rate while moving. I know this is a big ask. I have seen some commercially available pet collars which use UWB to monitor heart rate in active animals, unfortunately due to the meerkats small size these collars will not work for them. Thanks, Isabel" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR1443BOOST" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899505.json b/data/json/DLP/899505.json new file mode 100644 index 0000000000000000000000000000000000000000..c996c12e243c4701f0e7ca821b91fa06c675af52 --- /dev/null +++ b/data/json/DLP/899505.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899505", + "reporterName" : "Masatoshi Oguri", + "rankPoints" : "3110", + "resolutionStatus" : "", + "ticketName" : "TPS62260-Q1: Why 2 package schematics?", + "rankName" : "Expert", + "replies" : " 3", + "views" : " 18", + "queryText" : "Part Number: TPS62260-Q1 Hello, There are 2 package schematics for SON in the datasheet. DRV0006A and DRV0006D. Why 2? And which package is for which product? Thanks! Regards, Oguri (TIJ automotive FAE)", + "partNumber" : " TPS62260-Q1", + "allResponseList" : [ { + "contentId" : "3325595", + "userName" : "Tanvee", + "rankPoints" : "2555", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 12:43 PM", + "userId" : "5332788", + "content" : "Hi Oguri, Both packages are the same there is no difference from a technical point. DRV package drawing is for the WSON package and the DDC package drawing is for the SOT23 package. Best regards, Tanvee" + }, { + "contentId" : "3326412", + "userName" : "Masatoshi Oguri", + "rankPoints" : "3110", + "rankName" : "Expert", + "date" : "Apr 24, 2020 12:16 AM", + "userId" : "1878258", + "content" : "Hi Tanvee, There is obvious difference between them. Please make it clear which one of the packages is for each of the below devices. The customer will examine the devices when they receive to confirm if the correct ones are delivered. When they are found different, they will be rejected. Currently there is no information to determine which one of them is for each device. The information they are technically the same is meaningless here. The difference is obvious. Thank you. Regards, Oguri ・TPS62260TDRVRQ1 ・TPS62262TDRVRQ1" + }, { + "contentId" : "3327317", + "userName" : "Tanvee", + "rankPoints" : "2555", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 4:38 PM", + "userId" : "5332788", + "content" : "Hi Oguri, I am discussing it with the packaging team and will get back to you by next week. Best regards, Tanvee" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS62263", "/support/power-management/f/196/tags/TPS62260_2D00_Q1", "/support/power-management/f/196/tags/TPS62261", "/support/power-management/f/196/tags/TPS62262" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899506.json b/data/json/DLP/899506.json new file mode 100644 index 0000000000000000000000000000000000000000..008c77a19312ae7ac85899269c1f9930be6bce9b --- /dev/null +++ b/data/json/DLP/899506.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899506", + "reporterName" : "yan", + "rankPoints" : "20", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ34Z100-G1: self-learning ra flag shows 5555", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 29", + "queryText" : "Part Number: BQ34Z100-G1 Golden learning for the gas gauge chip. Qmax sucessful update. During ra table updata period (discharging), Ra table keeps updating, but Ra_a0 flag shows 5555. I notcie that normally this ra flag should begin with ff or 00. Is that correct that ra_flag shows 5555? what does this ra_a0 flag mean? Thank you very much!", + "partNumber" : " BQ34Z100-G1", + "allResponseList" : [ { + "contentId" : "3325964", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 4:27 PM", + "userId" : "1864278", + "content" : "Has your leaning cycle done yet? 0x5555 should mean that the resistance update is still in progress. Andy" + }, { + "contentId" : "3328007", + "userName" : "yan", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 26, 2020 7:34 AM", + "userId" : "6292367", + "content" : "hi andy, thank you for your reply. Understand that 5555 means under updating. but unfortunately i still failed the learning. the ra flag never changed to 0055 until the battery finished discharge. May i know that how can i start another learning cycle? just restart the learning by RESET--DISCHARGE--RELAX--CHARGE--RELAX---DISCHARGE? Do i have to reinstal the firmware?" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ34Z100_2D00_G1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899508.json b/data/json/DLP/899508.json new file mode 100644 index 0000000000000000000000000000000000000000..dd92dd0f45af2e4931aea2b84ec098030eb7ae82 --- /dev/null +++ b/data/json/DLP/899508.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899508", + "reporterName" : "user6316336", + "rankPoints" : "70", + "resolutionStatus" : "", + "ticketName" : "Compiler/IWR1642: Programmable Built-In Self-Test (PBIST) and Self-Test Controller (STC)", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 15", + "queryText" : "Part Number: IWR1642 Tool/software:company C/C++ Compiler Hello, I have a question about 28 Safety in the Technical Reference Manual. Are Programmable Built-In Self-Test (PBIST) and Self-Test Controller (STC) included in the software provided by TI? I think the functions of PBIST and STC are in the chip, but do I have to create the software myself?", + "partNumber" : " IWR1642", + "allResponseList" : [ { + "contentId" : "3325757", + "userName" : "Yogesh Siraswar", + "rankPoints" : "4025", + "rankName" : "Expert", + "date" : "Apr 23, 2020 2:45 PM", + "userId" : "52043", + "content" : "Hi, Yes, PBIST and STC is not part of SDK. Thanks Yogesh" + }, { + "contentId" : "3326747", + "userName" : "user6316336", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 7:11 AM", + "userId" : "6316336", + "content" : "Thanks for the answer. Is there any documentation or software to help me create the software myself?" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR1642", "/support/sensors/f/1023/tags/TI%2bC_2F00_C_2B002B00_%2bCompiler" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899515.json b/data/json/DLP/899515.json new file mode 100644 index 0000000000000000000000000000000000000000..add49e607e630fa9f7b662858d44b01344f12062 --- /dev/null +++ b/data/json/DLP/899515.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "899515", + "reporterName" : "user6004348", + "rankPoints" : "80", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC28950EVM-442: UCC28950 EVM-442 light load efficiency poor", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 31", + "queryText" : "Part Number: UCC28950EVM-442 HI sir I tested the demo board data and found that the efficiency is poor at light load . Because my design that fan is not working at light load In this case,the Phase-Shifted Full-Bridge MOS loss is very larger and breaking The actual test is as follows. Is there any way to improve it? Test data: Pin :17.4W Vout/Iout:12V/0.1A Pin :18.7W Vout/Iout:12V/0.2A Pin :19.8W Vout/Iout:12V/0.3A Pin :20.6W Vout/Iout:12V/0.4A Pin :21.6W Vout/Iout:12V/0.5A TKS", + "partNumber" : " UCC28950EVM-442", + "allResponseList" : [ { + "contentId" : "3325511", + "userName" : "Colin Gillmor", + "rankPoints" : "22565", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 11:00 AM", + "userId" : "1139376", + "content" : "Hello The UCC28950 (and UCC28951) has a burst mode to reduce dissipation at light loads. Please check that the EVM is operating in Burst Mode at light loads. Also, check that the SR drives are disabled (OUTE = OUTF = 0V). You can increase the TMIN threshold so that the controller enters burst mode at a higher current level. I have run my EVM in my lab at no load continuously without any problems so your unit is behaving a little differently. Please check the above items and let us know how you get on. Regards Colin" + }, { + "contentId" : "3326465", + "userName" : "user6004348", + "rankPoints" : "80", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 1:23 AM", + "userId" : "6004348", + "content" : "HI Colin I have recheck EVM that has a burst mode and the SR drive is disable at light load(0.1A~0.5A) THE EVM at no load is no problem ,but if add load at 01~0.5A,you will be find that input w is very large and efficiency is poor Pls be check your EVM at 0.1~0.5 load Finally I will try to adjust the TMIN to improve it ?" + }, { + "contentId" : "3326755", + "userName" : "Colin Gillmor", + "rankPoints" : "22565", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 7:22 AM", + "userId" : "1139376", + "content" : "Hello If you increase the Tmin value then that will increase the power level at which the EVM enters burst mode - Due to Covid-19 restrictions here in Ireland I won't be able to get into the lab for the forseeable future but I'd expect that my EVM behaves the same as yours. Let me know how you get on Regards Colin" + }, { + "contentId" : "3330053", + "userName" : "Colin Gillmor", + "rankPoints" : "22565", + "rankName" : "Mastermind", + "date" : "Apr 28, 2020 7:54 AM", + "userId" : "1139376", + "content" : "Hello Just wondering if you had been able to make any progress on this - Regards Colin" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC28950", "/support/power-management/f/196/tags/UCC28950EVM_2D00_442" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899522.json b/data/json/DLP/899522.json new file mode 100644 index 0000000000000000000000000000000000000000..ea6f1d3ad37fc6567557729c160af0a9b897979a --- /dev/null +++ b/data/json/DLP/899522.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899522", + "reporterName" : "JIYEON PARK", + "rankPoints" : "100", + "resolutionStatus" : "Resolved", + "ticketName" : "IWR6843ISK-ODS: Azimuth range heatmap", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 23", + "queryText" : "Part Number: IWR6843ISK-ODS Hi, When \"Remove Static Clutter\" in mmWave Demo Visualizer, Azimuth-Range Heatmap is stopped. Could you check what is problem? Below is my setting. - SDK 3.3 version - mmWave Demo Visualizer configuration - Results Before \"Remove Static Clutter\", Azimuth -Range Heatmap looks fine.", + "partNumber" : " IWR6843ISK-ODS", + "allResponseList" : [ { + "contentId" : "3325958", + "userName" : "AmandaN", + "rankPoints" : "11910", + "rankName" : "Genius", + "date" : "Apr 23, 2020 4:24 PM", + "userId" : "5084791", + "content" : "Hello, The azimuth range heatmap being shown is the Zero doppler (static) heatmap. When you use static clutter removal you are essentially removing the majority of the static signal. This is why you don't see any information in the azimuth-range heatmap. If you look at range-doppler heatmap you should be able to see data related to movement in the scene. Amanda" + }, { + "contentId" : "3326432", + "userName" : "JIYEON PARK", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 12:47 AM", + "userId" : "6295437", + "content" : "Hi, There are 3 static clutter removal options in SDK. - AoAProcDSP_clutterRemoval which called from AoAProcDSP_RangeAzimuthHeatmap - AoAProcDSP_clutterRemoval which called from AoAProcDSP_processMultipleVirtualAntennas - DPU_DopplerProcDSP_clutterRemoval All three are executed by \"clutterRemoval\" command. If there will be no information in azimuth-range heat map when use \"clutterRemoval\", why AoAProcDSP_clutterRemoval is implemented? And when I comment-out DPU_DopplerProcDSP_clutterRemoval function, still I can't see any information in the azimuth-range heat map. Could you recommend me how to implement both removing static clutter and seeing information in azimuth-range heat map?" + }, { + "contentId" : "3326529", + "userName" : "AmandaN", + "rankPoints" : "11910", + "rankName" : "Genius", + "date" : "Apr 24, 2020 2:30 AM", + "userId" : "5084791", + "content" : "What are you trying to see in the azimuth range heatmap? The azimuth range heatmap is plotting the zero Doppler, Static signal. It is not possible to have useful information in that Static azimuth range heatmap and use static clutter removal. You are removing all the static objects from a plot that is supposed to show static objects." + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR6843ISK_2D00_ODS" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899523.json b/data/json/DLP/899523.json new file mode 100644 index 0000000000000000000000000000000000000000..1bdb11963ee6d783b54e73243e794209035fd42b --- /dev/null +++ b/data/json/DLP/899523.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899523", + "reporterName" : "zeliha kaygun", + "rankPoints" : "20", + "resolutionStatus" : "", + "ticketName" : "EV2400: bq76930 evm", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 12", + "queryText" : "Part Number: EV2400 HI; ı am woeking bq76930 evm sor 10 series ı have been using ev2400 for monitoring with bq769x0 evaluation software but recently ı have errors and ı understand it is comminication issues.there was no problem till yesterday.how can i solve this problem? I added the data I saved to the registers recently while working and the error image. Thanks in advance for your help.", + "partNumber" : " EV2400", + "allResponseList" : [ { + "contentId" : "3325843", + "userName" : "Matt Sunna", + "rankPoints" : "24930", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 3:27 PM", + "userId" : "269312", + "content" : "Hi Zeliha, I'm not sure why the communication would stop working if it was working before, but here are a few things you can try: Make sure to follow all of the steps in the EVM User Guide Quick Start section like: The shunts from the headers connecting the AFE to the gauge should be removed. These are located in the upper left-hand corner of the EVM. 4-pin cable is connected between EV2400 and EVM I2C connector USB cable connected from PC to EV2400. Three green LEDs should be on for the EV2400 Ensure power supply is connected to EVM BATT terminals Press and release the BOOT switch on the EVM to wake up the BQ76930 If the EV2400 is suspected, you can re-program the EV2400 firmware. The latest firmware and the instruction for installing are located in the EV2400 product folder. I hope this helps you to find the issue. Best regards, Matt" + }, { + "contentId" : "3325973", + "userName" : "zeliha kaygun", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 4:31 PM", + "userId" : "6306580", + "content" : "Thank you Matt Sunna ; I tried but it can not be help. Is it possible that the device shifted to ship mode ; if it is so what can ı do then? Because I cant reach SHUT_A and SHUT_B registers to achieve and ı supplied with approximately 1.5 V TS1 pin to wake up device and still didnt work.I am working with BQSTUDİO simultanously by the way; and same problem was there so I cant used commond SHUTDOWN disable. Sincerely.." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ76930", "/support/power-management/f/196/tags/EV2400" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899527.json b/data/json/DLP/899527.json new file mode 100644 index 0000000000000000000000000000000000000000..6188f84e45e1e16b599e36f95c58eb47f7d14e41 --- /dev/null +++ b/data/json/DLP/899527.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899527", + "reporterName" : "Michiaki Tanii", + "rankPoints" : "1600", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM2940-N: Thermal shutdown down", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 9", + "queryText" : "Part Number: LM2940-N Hi team, Does the device go into shutdown if exceeding Tj ? or does the device have the other number for the temperature of thermal shutdown ? Thank you and best regards, Michiaki", + "partNumber" : " LM2940-N", + "allResponseList" : [ { + "contentId" : "3326022", + "userName" : "JCHK", + "rankPoints" : "27915", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 5:10 PM", + "userId" : "1108707", + "content" : "Hi Tanii-san, The LM2960-N is guaranteed to work up to TJ of 125C. While the datasheet does not state it, most thermal shutdowns occur somewhere between 150 and 160C. I hope this answers your question." + } ], + "tags" : [ "/support/power-management/f/196/tags/LM2940_2D00_N" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899531.json b/data/json/DLP/899531.json new file mode 100644 index 0000000000000000000000000000000000000000..77a509fd0cbf0d54dc888d7b79b7231e71d822ff --- /dev/null +++ b/data/json/DLP/899531.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899531", + "reporterName" : "byeung tak woo", + "rankPoints" : "20", + "resolutionStatus" : "Resolved", + "ticketName" : "UCC28950 :I don't understand the calculation formula.", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 18", + "queryText" : "Part Number: UCC28950 I don't understand the calculation formula. I don't understand the calculation formula.", + "partNumber" : " UCC28950", + "allResponseList" : [ { + "contentId" : "3325460", + "userName" : "Teng Feng", + "rankPoints" : "9390", + "rankName" : "Genius", + "date" : "Apr 23, 2020 9:46 AM", + "userId" : "5617595", + "content" : "Hello, Could you describe the question more clearly, where you don't understand? Regards, Teng" + }, { + "contentId" : "3328422", + "userName" : "byeung tak woo", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 7:26 AM", + "userId" : "6327223", + "content" : "이것은" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC28950" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899534.json b/data/json/DLP/899534.json new file mode 100644 index 0000000000000000000000000000000000000000..9e9f9efa329401f1d5868ebce2150844ed93e552 --- /dev/null +++ b/data/json/DLP/899534.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899534", + "reporterName" : "Emil Bonnevie", + "rankPoints" : "30", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TLV700: Reverse current issue", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 29", + "queryText" : "Part Number: TLV700 Hey E2E I have a situation where a battery is directly tied (with a MOSFET in series, to prevent charging) to Vout of the TLV700. Normally a 5V PSU is tied through a diode to V_in of the LDO, but in this test there is no input source. So when I attach this battery to V_out I see 40mA going into the LDO. I tried pulling CTRL of the LDO down, and it got me to 30mA. According to my measurements all the current is flowing in the LDO only, since I have isolated the circuit from the other parts. I am using a keysight N6705C for the current measurements. Is this normal behaviour? I placed a diode in series with the LDO to avoid back current - but I did not anticipate the LDO to drain all this current by itself!", + "partNumber" : " TLV700", + "allResponseList" : [ { + "contentId" : "3326202", + "userName" : "Kyle Van Renterghem", + "rankPoints" : "4860", + "rankName" : "Expert", + "date" : "Apr 23, 2020 8:13 PM", + "userId" : "1091764", + "content" : "Hi Emil, Yes, what you seem to be describing is normal, however it is important to note that it can damage the LDO. When Vout>Vin+0.3V this can cause reverse current (flowing from Vout to Vin) through an internal parasitic diode. This current is not limited by the LDO so this current can cause damage if too much current flows from Vout to Vin. For more information on reverse current please see the following blog post: /blogs_/b/powerhouse/archive/2018/07/25/ldo-basics-preventing-reverse-current-in-ldos" + }, { + "contentId" : "3326739", + "userName" : "Emil Bonnevie", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 7:04 AM", + "userId" : "5605050", + "content" : "Yes I have followed that document, and chose \"Use a diode before the LDO\". If I have that, what kind of current should I expect to be drawn into the LDO (feedback resistors for example) if CTRL=OFF?" + }, { + "contentId" : "3327361", + "userName" : "Kyle Van Renterghem", + "rankPoints" : "4860", + "rankName" : "Expert", + "date" : "Apr 24, 2020 5:21 PM", + "userId" : "1091764", + "content" : "Hi Emil, I'm sorry I misunderstood and thought the diode was added after you found this issue. I have a few questions to help clarify a few things: When you mention pulling CTRL down, are you referring to the enable (EN) pin? When this occurs is the LDO in dropout?" + } ], + "tags" : [ "/support/power-management/f/196/tags/LDO", "/support/power-management/f/196/tags/tlv700", "/support/power-management/f/196/tags/reverse%2bcurrent" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899536.json b/data/json/DLP/899536.json new file mode 100644 index 0000000000000000000000000000000000000000..67fab63c6c7d4e4482d2ce9f543a661f184817d2 --- /dev/null +++ b/data/json/DLP/899536.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "899536", + "reporterName" : "liwei qi", + "rankPoints" : "945", + "resolutionStatus" : "Resolved", + "ticketName" : "CCS/UCD3138A: question about DPWM3 Interrupt", + "rankName" : "Intellectual", + "replies" : " 4", + "views" : " 26", + "queryText" : "Part Number: UCD3138A Tool/software: Code Composer Studio The DPWM3 initialized code as follow: // Control-0 Dpwm3Regs.DPWMCTRL0.bit.PWM_EN = 1; // Enable, wait for Global En Dpwm3Regs.DPWMCTRL0.bit.CLA_EN = 0; // CLA Disabled, using curr limit to chop Dpwm3Regs.DPWMCTRL0.bit.PWM_MODE = 0; // Set mode: 0 - Normal Dpwm3Regs.DPWMCTRL0.bit.MSYNC_SLAVE_EN = 1; // slave Dpwm3Regs.DPWMCTRL0.bit.CBC_ADV_CNT_EN = 0; // Adv cnt limit enabled Dpwm3Regs.DPWMCTRL0.bit.CBC_PWM_AB_EN = 0; // Current limit enabled for AB outputs Dpwm3Regs.DPWMCTRL0.bit.PWM_A_INTRA_MUX = 0; Dpwm3Regs.DPWMCTRL0.bit.PWM_B_INTRA_MUX = 0; Dpwm3Regs.DPWMCTRL0.bit.BLANK_A_EN = 1; // Control-1 Dpwm3Regs.DPWMCTRL1.bit.HIRES_DIS = 1; //Dpwm3Regs.DPWMCTRL1.bit.ALL_PHASE_CLK_ENA = 1; Dpwm3Regs.DPWMCTRL1.bit.CHECK_OVERRIDE = 1; Dpwm3Regs.DPWMCTRL1.bit.EVENT_UP_SEL = 1; // UPdate end of period Dpwm3Regs.DPWMEV1.all = DPWM3_EVT1; Dpwm3Regs.DPWMEV2.all = DPWM3_EVT2; Dpwm3Regs.DPWMEV3.all = DPWM3_EVT3; Dpwm3Regs.DPWMEV4.all = DPWM3_EVT4; Dpwm3Regs.DPWMPRD.all = (PWM_PERIOD>>1); Dpwm3Regs.DPWMINT.bit.PRD_INT_SCALE = 2; //every 4 cycles primary(PRD_INT_SCALE = 2) Dpwm3Regs.DPWMINT.bit.PRD_INT_EN = 1; But I find that the dpwm3 interrupt don't happen. I use the PMbus protocol and debug_IO toggle to see it. The fir number is 26 in the fast interrupt. It need your help. Thanks!", + "partNumber" : " UCD3138A", + "allResponseList" : [ { + "contentId" : "3325741", + "userName" : "Yitzhak Bolurian", + "rankPoints" : "9475", + "rankName" : "Genius", + "date" : "Apr 23, 2020 2:37 PM", + "userId" : "350348", + "content" : "Hi Liwei, In order for interrupt to work you need to enable it in 3 levels. 1) In the peripheral (DPWM3) level (You are already showing this part being done) 2) In the CIM level by calling the two functions: //Configure IRQ write_reqmask(CIMINT_ALL_PWM2_COMP | CIMINT_ALL_DPWM3); //Configure FIQ write_firqpr(CIMINT_ALL_DPWM3); 3) And finally at the global (ARM7) level by calling the two functions: //Enable interrupts enable_fast_interrupt(); enable_interrupt(); So please first verify that all 3 steps are complete. If all the above does not work, please check fiq number 27 instead of 26. Regards, Yitzhak" + }, { + "contentId" : "3326722", + "userName" : "liwei qi", + "rankPoints" : "945", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 6:47 AM", + "userId" : "5298010", + "content" : "Hi, Yitzhak: Thank you very much! You are right. I forget to set the register of IRQ. I change the firmware, but only set the IRQ and not set the FIQ. Then UCD3138 could not program again. I write 0x5a5a with command 0xD8 to it. It return NACK. Why? How can I save UCD3138 to program again?" + }, { + "contentId" : "3327013", + "userName" : "Yitzhak Bolurian", + "rankPoints" : "9475", + "rankName" : "Genius", + "date" : "Apr 24, 2020 12:56 PM", + "userId" : "350348", + "content" : "Hi Liwei, Glad it helped. If you mean to write into IRQ register, this can only be done in ARM7 privileged mode and not in user mode. That is why the \"functions\" write_firqpr() and write_reqmask() are implemented by software interrupt and not as ordinary functions. Just change the parameters in the calls to the above two functions instead. Regards," + }, { + "contentId" : "3328048", + "userName" : "liwei qi", + "rankPoints" : "945", + "rankName" : "Intellectual", + "date" : "Apr 26, 2020 9:27 AM", + "userId" : "5298010", + "content" : "Hi,Yitzhak: Thank you!" + } ], + "tags" : [ "/support/power-management/f/196/tags/code%2bComposer%2bstudio", "/support/power-management/f/196/tags/UCD3138A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899542.json b/data/json/DLP/899542.json new file mode 100644 index 0000000000000000000000000000000000000000..53178c8d663ca3a60435f095738c527cf985a954 --- /dev/null +++ b/data/json/DLP/899542.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899542", + "reporterName" : "Kazuki Itoh", + "rankPoints" : "1990", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "WEBENCH® Tools/TPSM846C24: Input Capacitor Selection", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 27", + "queryText" : "Part Number: TPSM846C24 Tool/software: WEBENCH® Design Tools Hi team, My customer wants to replace D/S recommended 330uF input bulk capacitor to MLCC due to availability issue. He wants to know if it is OK to replace bulk cap by 47uF x7 (329uF) MLCC, or fewer. 47uF MLCC will be 16V rated and it is going to decrease -30% - -53% capacitance due to DC bias. My customer don't want to use neither aluminum cap nor tantalum cap. Please help us move forward with 47uF MLCC. Regards, Itoh", + "partNumber" : " TPSM846C24", + "allResponseList" : [ { + "contentId" : "3326111", + "userName" : "Kris F", + "rankPoints" : "14480", + "rankName" : "Genius", + "date" : "Apr 23, 2020 6:12 PM", + "userId" : "3795855", + "content" : "Hi Itoh-san, It should be fine to use ceramic capacitors but some considerations should be kept in mind. What are the input voltage ripple and transient requirements? Does the proposed total ceramic input cap with derating due to DC bias still allow them to meet their input ripple requirements? You can refer to this app note for guidance on determining cap value. The other consideration is what the input source inductance is. If the input supply is coming in through long inductive leads or if an input filter inductor is used before the TPSM846C24, then this L-C can have high a high Q that can lead to input ringing, especially if all ceramic capacitors are used. The higher ESR of an aluminum/tantalum helps dampen out this resonance and is why we often include a bulk cap on our EVMs and other boards where the input is coming from a bench supply. If all ceramic input cap is used with an inductive source, then other methods may be needed to dampen the effective input filter as discussed in this app note on input filter design." + } ], + "tags" : [ "/support/power-management/f/196/tags/WEBENCH_AE00_%2bDesign%2bTools", "/support/power-management/f/196/tags/TPSM846C24" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899543.json b/data/json/DLP/899543.json new file mode 100644 index 0000000000000000000000000000000000000000..3b29624f80b65aca42293842a689ebb4ac076bad --- /dev/null +++ b/data/json/DLP/899543.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "899543", + "reporterName" : "Jerry Chen82343", + "rankPoints" : "3020", + "resolutionStatus" : "", + "ticketName" : "TPS3705: WDO pull high mechanism", + "rankName" : "Expert", + "replies" : " 4", + "views" : " 25", + "queryText" : "Part Number: TPS3705 Hi there, My customer is using WDO to pull down MR to reset the processor itself which stopped feed WDI. In the WDO output, there is a 0.1uF capacitor that prevents MR pulled low to its threshold to trigger reset. After removing the capacitor, the issue is closed as reset function works as wanted. However, in this issue with 0.1uF, we saw something interesting. WDO couldn't go low enough to MR threshold, and it was pulled up after a short time. We don't know how it be pulled up, as no WDI signal(always pulled high in last figure) and it couldn't be the internal 14kohm pull-up resister of MR. I would like to if there is other mechanism to pull WDO high. Thanks.", + "partNumber" : " TPS3705", + "allResponseList" : [ { + "contentId" : "3326519", + "userName" : "Abhinav.Sharma", + "rankPoints" : "6855", + "rankName" : "Expert", + "date" : "Apr 24, 2020 2:10 AM", + "userId" : "4691355", + "content" : "Hi Jerry, In reference to your second statement: However, in this issue with 0.1uF, we saw something interesting. WDO couldn't go low enough to MR threshold, and it was pulled up after a short time. We don't know how it be pulled up, as no WDI signal(always pulled high in last figure) and it couldn't be the internal 14kohm pull-up resister of MR. How long after did WDO go back high? Was this oscillating behavior? Thanks, Abhinav." + }, { + "contentId" : "3326534", + "userName" : "Jerry Chen82343", + "rankPoints" : "3020", + "rankName" : "Expert", + "date" : "Apr 24, 2020 2:38 AM", + "userId" : "1818729", + "content" : "Hi Abhinav, You could see in the second figure. WDO was pull low from Point A to B then return to high(Point C). In the third figure, you could see the time interval between each WDO spurs is 1.6s, which is exactly the watchdog response time. But, there is no WDI signal to change the WDO status. It would be something internal to pull it back to high then repeat the some action after every 1.6s." + }, { + "contentId" : "3327810", + "userName" : "Abhinav.Sharma", + "rankPoints" : "6855", + "rankName" : "Expert", + "date" : "Apr 25, 2020 8:46 AM", + "userId" : "4691355", + "content" : "Hi Jerry, I think there is some confusion here. Are you under the impression that while there is a WDI fault, WDO should stay low continuously? Thanks, Abhinav." + }, { + "contentId" : "3328266", + "userName" : "Jerry Chen82343", + "rankPoints" : "3020", + "rankName" : "Expert", + "date" : "Apr 27, 2020 4:17 AM", + "userId" : "1818729", + "content" : "Hi Abhinav, In Figure 3, WDI shops toggling and remain high, at this time , there are spurs in WDO. Zoom in the spur in Figure 2, you could see WDO doesn't go low enough to MR threshold then pulled up by something unknown. It happens only when the 0.1uF cap presents." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS3705" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899547.json b/data/json/DLP/899547.json new file mode 100644 index 0000000000000000000000000000000000000000..4093a4b3a77e2cbe0ead39892fa40772712d6f20 --- /dev/null +++ b/data/json/DLP/899547.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899547", + "reporterName" : "Astghik Chalyan", + "rankPoints" : "70", + "resolutionStatus" : "", + "ticketName" : "DLP2010NIR: Diffraction efficiency plots of DLP2010 and DLP2010NIR", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 49", + "queryText" : "Part Number: DLP2010NIR Dear All, I am using DLP2010 and DLP2010NIR for my research. I found from your webpage handy document \"DMD Optical Efficiency for Visible Wavelengths\" /lit/an/dlpa083a/dlpa083a.pdf. On the 13th page of the material is a Figure 4-6. 5.4 µm Pitch DMD Mirror Calculated Diffraction Efficiency, for the wavelength range from 400nm to 700nm. I am wondering what is the DMD Mirror Calculated Diffraction Efficiency in the range from 350nm till 750nm. Could you please provide any information about the behaviour of the DMD for the mentioned range? I was also searching that type of document for the DLP2010NIR, but unfortunately I could not find. If you have, could you please provide diffraction efficiency plot or numerical data for the DLP2010NIR? Thank you in advance. Best regards, Astghik", + "partNumber" : " DLP2010NIR", + "allResponseList" : [ { + "contentId" : "3326587", + "userName" : "Vivek Thakur", + "rankPoints" : "9880", + "rankName" : "Genius", + "date" : "Apr 24, 2020 3:52 AM", + "userId" : "9052", + "content" : "Hello Astghik, Is there a specific wavelength and F/# of interest? I will reach to my colleague and try to get you the answer. regards, Vivek" + }, { + "contentId" : "3326894", + "userName" : "Astghik Chalyan", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 10:13 AM", + "userId" : "6083321", + "content" : "Dear Vivek, Thank you for your reply. For the DLP2010, I am interested in the region from 350 nm to 750 nm. For the DLP2010NIR, I am interested in the region from 650 nm to 2500 nm. At this moment, I do not specify F/# for my system. Thank you in advance. I hope to hear from you soon. Best regards, Astghik" + }, { + "contentId" : "3328178", + "userName" : "Vivek Thakur", + "rankPoints" : "9880", + "rankName" : "Genius", + "date" : "Apr 27, 2020 12:14 AM", + "userId" : "9052", + "content" : "Hello Asghik, I will work on it and it will take some time. Meanwhile, it will be very helpful if you could share what application or problem you are trying to address? regards, Vivek" + } ], + "tags" : [ "/support/dlp/f/94/tags/diffraction%2befficiency%2bplot", "/support/dlp/f/94/tags/DLP2010NIR", "/support/dlp/f/94/tags/DLP2010" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899549.json b/data/json/DLP/899549.json new file mode 100644 index 0000000000000000000000000000000000000000..1e07b578fa8d5076a7dd6d2106328152ece7a3f7 --- /dev/null +++ b/data/json/DLP/899549.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899549", + "reporterName" : "Jamie Tseng", + "rankPoints" : "1290", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS23754: Dual input solutions? (one is PoE and the other is 5V adapter)", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 21", + "queryText" : "Part Number: TPS23754 Hi Team, My customer applies TPS23754 in their new project (output 5V/5A). And they have dual input, one is from PoE and the other is 5V adapter. May I know how to achieve disable TPS23754 when 5V adapter plug-in and connect the power path right directly to the output load (5V)? Is this function achievable? Thanks and best regards, Jamie", + "partNumber" : " TPS23754", + "allResponseList" : [ { + "contentId" : "3326043", + "userName" : "Michael Pahl", + "rankPoints" : "4915", + "rankName" : "Expert", + "date" : "Apr 23, 2020 5:26 PM", + "userId" : "6102321", + "content" : "Hello Jamie, Yes this is possible. Please refer to Option 3 in the following paper: /lit/an/slva306a/slva306a.pdf The challenge is to turn off the PoE when adapter is present. The paper outlines how to do this by disabling detection. If this post answers your question, please indicate so by marking this thread as resolved. Thank you. Regards, Michael P. Applications Engineer customer organization" + }, { + "contentId" : "3328571", + "userName" : "Jamie Tseng", + "rankPoints" : "1290", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 10:04 AM", + "userId" : "5839773", + "content" : "Hi Michael, Could I send the schematic to you so you could help to check if there is a problem? Thanks for your kindly support. Best regards, Jamie" + }, { + "contentId" : "3329489", + "userName" : "Michael Pahl", + "rankPoints" : "4915", + "rankName" : "Expert", + "date" : "Apr 27, 2020 8:53 PM", + "userId" : "6102321", + "content" : "Hello Jamie, I will support this request through email. Thank you! Regards, Michael Pahl" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS23754" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899559.json b/data/json/DLP/899559.json new file mode 100644 index 0000000000000000000000000000000000000000..fe29f0301f7af82f05e636fb0c74734a77699b4a --- /dev/null +++ b/data/json/DLP/899559.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899559", + "reporterName" : "d_zero", + "rankPoints" : "1965", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM5175: Inductor selection", + "rankName" : "Expert", + "replies" : " 3", + "views" : " 28", + "queryText" : "Part Number: LM5175 Dear *, inductor selection for LM5175, different value from calculator and equation in datasheet eg. Vinmin =9V, Vinnom = 12V, Vinmax=27V, Vout=9V, Iout=2A, fsw=490kHz also eg. Vinmin =9V, Vinnom = 12V, Vinmax=27V, Vout=48V, Iout=0.5A, fsw=490kHz Calculator output L recommended 25.2uH -> equation (14) in Ds L=14.02uH why is this so, is there a error in calculator? Best Regards.", + "partNumber" : " LM5175", + "allResponseList" : [ { + "contentId" : "3326471", + "userName" : "Youhao Xi", + "rankPoints" : "39085", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 1:26 AM", + "userId" : "1880260", + "content" : "Hi d_zero, Thank you for your interests in the LM5175. These equations are used to help find the required inductance per ripple current limit (40% ripple current is used in the example), since the ripple current will change with duty cycle, this is why you get two different results. Then, you need to do a trade-off to make your final decision. The selected inductance is usually between eq (13) and (14) results. In your case, eq (13) does not apply. Therefore, the calculator choose a value for you. It calculates the inductance per eq (14) for min, typical and max input voltage, and choose the mean value among them. It ends up to ~25uH. Hope this clarifies. Thanks, Youhao Xi, Applications Engineering" + }, { + "contentId" : "3326898", + "userName" : "d_zero", + "rankPoints" : "1965", + "rankName" : "Expert", + "date" : "Apr 24, 2020 10:17 AM", + "userId" : "4376384", + "content" : "Hi Youhao, 1) if i understand correctly if booth equations 13 and 14 are apply, the output voltage can be buck, buck-boost or boost regarding to Vinmin, Vintyp and Vinmax then the read off is made regarding to eq 13 and eq 14 is that correct? 2) if only one of the eq13 or eq14 applies then the output voltage is either buck or boost regarding to Vinmin, Vintyp and Vinmax , and then i have to calculate the eq13 or eq14 with all Vinmin, Vintyp and Vinmax and do a mean value? 3) can you tell why 40% ripple current is chosen in DS, on what does depend this? Ho does the ripple current change regarding to duty-cycle? How is the duty cycle calculated for LM5175, also how it is calculated in CCM and DCM mode? 4) Regarding the inductor tread off, what is the tread-off if i choose bigger or smaller inductance value? Also does this depend on CCM and DCM mode of operation? 5) i'm trying to calculate inductor for Vinmin = 9V Vinmax = 27V Vintyp = 12V or 24V But i want have adjustable Vout with DAC from 3V to 48V ( Pmax 24W, Ioutmax 2A) i cant do this with your calculator so i made an excel, please can you look at it and what do you think it is a good thing to go with 10uH inductor? Vin min 9 V diL 0.4 Vin 12 V Vin 24 V Vin max 27 V Rt calc 49.751793 kOhm Rt 49.9 kOmh fsw calc 488.6869 kHz fsw 490 kHz Vout [V] 3 6 9 12 15 18 21 24 27 36 48 Iout max [A] 2 2 2 2 1.6 1.333333 1.142857 1 0.888889 0.666667 0.5 Lrec [uH] (company calculator) 5.1 6.4 3.8 7 9.7 11.6 11.5 10.3 7.3 17.5 25.3 L_buck_vin_min 5.11575 5.11575 0 -10.2315 -31.9734 -69.0626 -125.336 -204.63 -310.782 -828.752 -2128.15 L_buck_vin_12V 5.7552188 7.673625 5.755219 0 -11.99 -34.5313 -70.5014 -122.778 -194.239 -552.501 -1473.34 L_buck_vin_24V 6.7144219 11.51044 14.38805 15.34725 17.98506 17.26566 11.75024 0 -19.4239 -138.125 -491.112 L_buck_vin_max (eq13) 6.821 11.93675 15.34725 17.0525 21.31563 23.02088 20.88931 13.642 0 -92.0835 -381.976 L_boost_vin_min (eq14) -138.1253 -17.2657 0 4.316414 6.906263 8.632828 9.866089 10.79104 11.51044 12.94924 14.02835 L_boost_vin_12V -368.334 -61.389 -13.642 0 6.1389 10.2315 13.15479 15.34725 17.0525 20.463 23.02088 L_boost_vin_24V -3437.784 -736.668 -272.84 -122.778 -73.6668 -40.926 -17.5397 0 13.642 40.926 61.389 L_boost_vin_max -4972.509 -1087.74 -414.376 -194.239 -124.313 -77.6955 -44.3974 -19.4239 0 38.84773 67.98352 L_select 10 10 10 10 10 10 10 10 10 10 10 eff 0.9 iLmax (eq15) 0.7407407 1.481481 2.222222 2.962963 2.962963 2.962963 2.962963 2.962963 2.962963 2.962963 2.962963 iLpeak (eq16) -1.100929 1.021064 2.222222 3.193172 3.331297 3.42338 3.489154 3.538485 3.576853 3.653589 3.711141 iLsat (eq17) -1.651394 1.531596 3.333333 4.789758 4.996945 5.135071 5.233732 5.307727 5.365279 5.480384 5.566712 Best Regards." + }, { + "contentId" : "3327497", + "userName" : "Youhao Xi", + "rankPoints" : "39085", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 7:40 PM", + "userId" : "1880260", + "content" : "My answers: (1) Yes (2) Yes (3) It is a general good practice. You can also choose 10% to 60%. The ideal inductor will have 0% ripple current but you cannot have it in reality. If the ripple current is too high, you are more easily running into DCM at reduced load. (4) The results under different conditions require different values. The trade off is not to go extreme. You should choose one to be fair with all these conditions. (5) Our calculator is set for a single Vout level. What you calculated looks fine. You effort can be saved if you run our calculator for different Vout and Iout conditions and get a list of recommended inductor, then choose a mean value like said in (4). You should conclude to the same. Thanks Youhao" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM5175" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899560.json b/data/json/DLP/899560.json new file mode 100644 index 0000000000000000000000000000000000000000..97583fa657373b9883f5ef1cc14b0cb81fcda3e8 --- /dev/null +++ b/data/json/DLP/899560.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899560", + "reporterName" : "Amelie Zheng", + "rankPoints" : "3660", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS61087-Q1: DRC0010R and DRC0010J", + "rankName" : "Expert", + "replies" : " 3", + "views" : " 15", + "queryText" : "Part Number: TPS61087-Q1 Hi Team, What is the difference between DRC0010R and DRC0010J? If customer need to draw the package, which one should they draw, R or J? There are two types of thermal resistance, but there is indeed only one type of package VSON. Is there any difference between the two types of thermal resistance in the shape of chip?", + "partNumber" : " TPS61087-Q1", + "allResponseList" : [ { + "contentId" : "3326462", + "userName" : "Helen chen", + "rankPoints" : "32965", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 1:20 AM", + "userId" : "4197150", + "content" : "Amelie, No big difference, either package is OK." + }, { + "contentId" : "3326495", + "userName" : "Amelie Zheng", + "rankPoints" : "3660", + "rankName" : "Expert", + "date" : "Apr 24, 2020 1:45 AM", + "userId" : "5617644", + "content" : "Hi Helen, Thanks for your reply. Which package do you recommend? It seems WDR has better thermal performance. So the 2nd one TPS61087QWDRCRQ1 is the better choice?" + }, { + "contentId" : "3326500", + "userName" : "Helen chen", + "rankPoints" : "32965", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 1:51 AM", + "userId" : "4197150", + "content" : "Amelie, I replied you by email. it depend on the customer. if they want to check the soldering by eye, then they can use WDRC, this is a new package generated last year. while the other is old one. WDRC is more expensive. Some high-level automotive customer likes it. While DRC is cheap and most customer choose this one." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS61087_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899566.json b/data/json/DLP/899566.json new file mode 100644 index 0000000000000000000000000000000000000000..d011079aa80f85adf3216413895708191a355f50 --- /dev/null +++ b/data/json/DLP/899566.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899566", + "reporterName" : "Jimmy Lai", + "rankPoints" : "30", + "resolutionStatus" : "", + "ticketName" : "UCC28C43: Sometimes can't boost to 54V", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 16", + "queryText" : "Part Number: UCC28C43 Hi Team The customer's project circuit specifications are as follows: Vin = 12V Vout = 54V Iout = 0.6A and customer has a issue that sometimes the circuit can't boost up to 54V Ouput voltage is 54V 、24V and 0V Please refer to the schematic as below May I ask what could cause such a problem? Can you please double confirm the schematic ? thank you very much!", + "partNumber" : " UCC28C43", + "allResponseList" : [ { + "contentId" : "3326872", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 9:46 AM", + "userId" : "1139254", + "content" : "Hi Jimmy, Can you attach a pdf of the schematic to the post, it is not possible to read the component values from the image on the forum. Can the you also attached waveforms of the output voltage and the CS and COMP pin when the output voltage starts to decreases. Thanks Peter" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC28C43" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899569.json b/data/json/DLP/899569.json new file mode 100644 index 0000000000000000000000000000000000000000..cbbc65bbc07f8968f00b47d8f241a25c680f9dfc --- /dev/null +++ b/data/json/DLP/899569.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899569", + "reporterName" : "Cedrick Jimenez", + "rankPoints" : "1675", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ35100: Chemistry ID", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 22", + "queryText" : "Part Number: BQ35100 Hi, Good day. I hope everything is fine at your place. Our customer tried to find the cell that they will use in the chemistry table in BQStudio and they didn't find it. The table is updated (786). The cell is the \"ER34615M\" from ULTRALIFE. The nearest one is the number Chem ID 0622. Is that the good one ? I would appreciate your support for this. Thank you and have a great day. Regards, Cedrick 001007605-da-01-en-ULTRALIFE_LITHIUM_BATTERIE_ER34615M_D.pdf", + "partNumber" : " BQ35100", + "allResponseList" : [ { + "contentId" : "3326303", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 10:04 PM", + "userId" : "1864278", + "content" : "I have assigned this issue to my colleague and he will get back to you. Andy" + }, { + "contentId" : "3327589", + "userName" : "Eric Vos24", + "rankPoints" : "3585", + "rankName" : "Expert", + "date" : "Apr 24, 2020 9:44 PM", + "userId" : "3440231", + "content" : "Cedrick, Unfortunately there is currently no way to match a primary cell to one listed in our database. A new ChemID would be needed. I will start a private thread to get you connected to the correct person. Thanks, Eric Vos" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ35100", "/support/power-management/f/196/tags/bqStudio" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899574.json b/data/json/DLP/899574.json new file mode 100644 index 0000000000000000000000000000000000000000..488a0d4e3a2235ce6b8d7fef5c57e70409c04d34 --- /dev/null +++ b/data/json/DLP/899574.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899574", + "reporterName" : "Stefano Cirelli", + "rankPoints" : "180", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "IWR6843ISK-ODS: Some question about unit test of mmwave library (SDK3.3.0.03)", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 29", + "queryText" : "Part Number: IWR6843ISK-ODS Hi all, I have some doubts about the tests inside the packages\\ti\\control\\mmwave of SDK3.3.0.03. YFI, I use an environment with a IWR6843ISK-ODS installed on a MMWAVEICBOOST. 1 - The 4 tests in minimal are the same included in the full tests? 2 - The last print of the test is \"Feature: MMWave MSS Deinitialized: Passed\". Is it correct? I expekt a conclusion like the other test: ****************************************** Debug: MmwaveLink Test completed ****************************************** 3 - To running a test I have to set the gTestSelection global variable in MSS and DSS also. For the MSS I use the console windows in CCS. Instead for the DSS I have to use the \"expressions\" windows. Is this the correct way to work? 4 - I have some problem after each test of \"Calibration Data Save/Restore\". After these tests I cannot launch another test correctly, even if I reset the MMWAVEICBOOST with NRST button. The error happens when I running the DSS: [C674X_0] ti.sysbios.heaps.HeapMem: line 429: assertion failure: A_invalidFree: Invalid free xdc.runtime.Error.raise: terminating execution The unique way that I have found to fix this problem is to power down and power up the board. Regards, Stefano", + "partNumber" : " IWR6843ISK-ODS", + "allResponseList" : [ { + "contentId" : "3326392", + "userName" : "Nitin Sakhuja", + "rankPoints" : "21725", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 11:38 PM", + "userId" : "1602842", + "content" : "Hi Stefano, 1. As the name suggests, the tests under minimal configure the mmWave library in MINIMAL config mode while those in under full configure it in FULL config mode. Please refer to the mode definition MMWave_ConfigurationMode_e in C:\\ti\\mmwave_sdk_03_03_00_03\\packages\\ti\\control\\mmwave\\mmwave.h 2. Please allow me a few days to check the expected output and get back to you on this. 3. Looking at the code for MMWaveLink_initTask in main_full_dss.c and main_full_mss.c, this is expected behavior. MSS reads the testSelection variable from stdin (concole) while DSS uses the global directly as shown below main_full_dss.c /* We are waiting for the test selection to be entered by the MSS. The DSS and MSS need\n * to work in cojunction with each other. */\n System_printf (\"***************************************************\\n\");\n System_printf (\"Waiting for the test selection to be entered by MSS\\n\");\n System_printf (\"In CCS: Set the Global Variable 'gTestSelection'\\n\");\n System_printf (\"***************************************************\\n\");\n while (1)\n {\n if ((gTestSelection >= 1) && (gTestSelection <= 9))\n break;\n Task_sleep(1);\n } main_full_mss.c System_printf (\"8. [Cooperative Mode] MSS Calibration Data Save/Restore\\n\");\n System_printf (\"9. [Cooperative Mode] DSS Calibration Data Save/Restore\\n\");\n System_printf (\"*************************************************\\n\");\n System_printf (\"Enter your choice: \");\n if (gMCPIEnable == 0) /* Run test from CCS */\n {\n fgets (inputString, 3U, stdin);\n gTestSelection = inputString[0] - '0';\n } 4. Please allow me a few days to check on this. I will get back to you on items 2 and 4 next week. Regards -Nitin" + } ], + "tags" : [ "/support/sensors/f/1023/tags/SYSBIOS", "/support/sensors/f/1023/tags/IWR6843ISK_2D00_ODS", "/support/sensors/f/1023/tags/MMWAVEICBOOST" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899576.json b/data/json/DLP/899576.json new file mode 100644 index 0000000000000000000000000000000000000000..554e38128ca87f64c26defd46f9760f2ca1a2d82 --- /dev/null +++ b/data/json/DLP/899576.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899576", + "reporterName" : "David Naviaux", + "rankPoints" : "360", + "resolutionStatus" : "Resolved", + "ticketName" : "LM3409: Can I drive a single LED?", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 14", + "queryText" : "Part Number: LM3409 Hi, I would like to use the LM3409 to drive a single LED with a forward voltage as low as 1.5V but as high as 6.2V with in input voltage of 24V. The output LED current will range from 250mA to 4A. Can I use a fixed off-time by using a fixed voltage at Roff, Coff network instead of Vo? Thank you, David", + "partNumber" : " LM3409", + "allResponseList" : [ { + "contentId" : "3325615", + "userName" : "Irwin Nederbragt", + "rankPoints" : "20765", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 1:01 PM", + "userId" : "1880111", + "content" : "Hello David, Yes you can drive that load, you just have to make sure the minimum on-time doesn't get reached. This means the switching frequency cannot be on the high end. Ton of 211 ns is the maximum Tonmin. (Vout/Vin)*1/Fsw needs to stay above this where Vout is the lowest voltage. The off time can be generated from an external voltage however the off time compensation for keeping the current ripple constant will not be functioning. To mitigate this as much as possible is to minimize the current ripple (higher inductor value) since the LM3409 regulates peak current and the current ripple will change with change in output voltage. If your input voltage is fixed at 24 volts you can even use that for the Roff. Another option is figure 27, page 17 of the datasheet which is used for shunt FET dimming. This also works for low output voltages and start-up issues with low output voltage and high output capacitance. Since your output voltage range is very low the off-time compensation will not be that accurate regardless since it's based on charging an RC to 1.243V. Best Regards," + }, { + "contentId" : "3325622", + "userName" : "David Naviaux", + "rankPoints" : "360", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 1:09 PM", + "userId" : "51079", + "content" : "Hi Irwin, Thank you for your quick response. Regards, David" + } ], + "tags" : [ "/support/power-management/f/196/tags/LED", "/support/power-management/f/196/tags/LM3409" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899580.json b/data/json/DLP/899580.json new file mode 100644 index 0000000000000000000000000000000000000000..b674fa8e57c6a2a79eae916cbddd1b00d71cec76 --- /dev/null +++ b/data/json/DLP/899580.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899580", + "reporterName" : "JeongKi Park", + "rankPoints" : "20", + "resolutionStatus" : "", + "ticketName" : "MMWCAS-DSP-EVM: I have question about setting up TDA Capture Card", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 34", + "queryText" : "Part Number: MMWCAS-DSP-EVM Hi. I have AWR1243p cascade evm and TDA2 Cascade Radar Host Board. Reading the mmwave_studio_cascade_user_guide, I follow the step. I have some questions 1. I have flashed the TDA firmware to SD card which is located in processor_sdk_cascade_radar_03_08_00_00_Binaries/vision_sdk/prebuilt/windows/sdimage.img.xz Is it right? 2. After flashing the firmware, I put that SD card to TDA2 Cascade Radar Host Board. Then using teraterm, I booted the EVM. However, there were errors which says \"Failed to start load kernel modules\", \"Failed to synchronize system and MW clocks\"... How can I fix it? 3. Although there were errors, the IP address is correctly identified after entering the command \"ifconfig\" Please Help me.", + "partNumber" : " MMWCAS-DSP-EVM", + "allResponseList" : [ { + "contentId" : "3325923", + "userName" : "Cesar", + "rankPoints" : "52960", + "rankName" : "Guru", + "date" : "Apr 23, 2020 4:05 PM", + "userId" : "20288", + "content" : "Hi, Can you please let us know where did you find this information \". I have flashed the TDA firmware to SD card which is located in processor_sdk_cascade_radar_03_08_00_00_Binaries/vision_sdk/prebuilt/windows/sdimage.img.xz\" I have checked the mmwave_studio_cascade_user_guide but did not mention the sdimage.img.xz Thank you Cesar" + }, { + "contentId" : "3326524", + "userName" : "JeongKi Park", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 2:22 AM", + "userId" : "6284170", + "content" : "Sorry I was confused. I have flashed the TDA firmware to SD card which is located in mmwave_studio_02_01_00_00/mmwavestudio/PlatformBinaries/TDA2Firmware/sdiamge.img.xz following the 4.2 step." + }, { + "contentId" : "3329491", + "userName" : "Randy Rosales", + "rankPoints" : "5580", + "rankName" : "Expert", + "date" : "Apr 27, 2020 8:56 PM", + "userId" : "1068709", + "content" : "Hi JeongKi, I am assigning this thread to the TDA2/ProcessorsSDK support team to help you out further. Thank you, -Randy" + } ], + "tags" : [ "/support/sensors/f/1023/tags/awr20_5F00_p2_5F00_swa20_5F00_cascade", "/support/sensors/f/1023/tags/MMWCAS_2D00_DSP_2D00_EVM" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899581.json b/data/json/DLP/899581.json new file mode 100644 index 0000000000000000000000000000000000000000..be555a2d31b3151459408571d0679cc0a43897a8 --- /dev/null +++ b/data/json/DLP/899581.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "899581", + "reporterName" : "user6300248", + "rankPoints" : "70", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ27520EVM: battery SOC suddenly drops to 0", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 32", + "queryText" : "Hello technical support： At present, we have successfully learned the battery charge curve on the bq27520evm. Were also strictly according to the learning cycle document and get the dffs with STATUS = 2. When we use the EVM to test the accuracy of the battery charge curve , we found that if we use a larger load (2A) , the SOC will directly jump value to 0 from a large value . The watch log is shown in the figure below. The log and ggfile of the whole process are also provided in the attachment, please help to check this problem. Thanks ! 200423.rar", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3325974", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 4:32 PM", + "userId" : "1864278", + "content" : "We will take a look and get back to you. Andy" + }, { + "contentId" : "3326160", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 7:16 PM", + "userId" : "1864278", + "content" : "I see in your gg file, the chemistry id 3359 is used. It is for a battery that operates from 4.35V to 3.0V. Did you use the GPCCHEM tool to find out this chemistry id? Can I see your GPC report? Also, did you see the same issue when you did the learning cycle? Thanks. Andy" + }, { + "contentId" : "3326675", + "userName" : "user6300248", + "rankPoints" : "70", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 6:06 AM", + "userId" : "6300248", + "content" : "Hi andy, Thank you for your review and reply！ I have used the GPC tool to conduct two chemical ID evaluations. One of the original data was generated by the battery manufacturer's charge and discharge test , and the other one was generated from bqstudio . Both two tests are strictly followed the GPC data collection document. Could you please help me to see if these two chemical IDs can be used , will it cause the above problems? Do I need to learn chemistry ID again ? Reports are in the attachment. data-report1.zipdata-report0.zip In addition, we use 1 / 7C discharge rate training (900ma) in the learning cycle, but the discharge current of the typical application is about 2A. Is this the main reason cause above problems? Do we need to use 2A discharge current during the constant current discharge step during learning? But I worry that may cause a fail learning due to the discharge rate recommended in official document is 0.1C ~ 0.2C." + }, { + "contentId" : "3327632", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 24, 2020 10:18 PM", + "userId" : "3528441", + "content" : "Yes, you can increase the rate so that we need to be above 0.1 C for learning cycle." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ27520EVM" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899582.json b/data/json/DLP/899582.json new file mode 100644 index 0000000000000000000000000000000000000000..055c7710b830e4157ef0b7118c1ed7fa4bbee5ff --- /dev/null +++ b/data/json/DLP/899582.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899582", + "reporterName" : "Eggsy Pang", + "rankPoints" : "4525", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS54325: Input 5V power up, sometimes TPS54325 do not output.", + "rankName" : "Expert", + "replies" : " 3", + "views" : " 16", + "queryText" : "Part Number: TPS54325 Hi team, My customer used TPS54325 for 5V input to 1.2V output. If the 5V power up slowly up to 16ms, TPS54325 don't ouput 1.2V, like shutdown. If the 5V power up quicker up to 5ms, TPS54325 work normally and have 1.2V output. Do you know why? Below waveform show 1.2V shutdown", + "partNumber" : " TPS54325", + "allResponseList" : [ { + "contentId" : "3326200", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Apr 23, 2020 8:11 PM", + "userId" : "24596", + "content" : "Eggsy, TPS54325 has latching under voltage protection. If the input voltage rises too slowly and the output is not within 70% of the set value after 1.7 X the slow start time, the device will latch off. See section 8.3.5 in the datasheet." + }, { + "contentId" : "3326591", + "userName" : "Eggsy Pang", + "rankPoints" : "4525", + "rankName" : "Expert", + "date" : "Apr 24, 2020 3:56 AM", + "userId" : "4736150", + "content" : "Hi John, DO you see the waveform blue one. We can see the FB pin voltage go up and go down. Do you know why? Thanks!" + }, { + "contentId" : "3326759", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Apr 24, 2020 7:26 AM", + "userId" : "24596", + "content" : "Eggsy, The scope shot is too low resolution. I cannot read anything from it. What are the voltage scales?" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS54325" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899586.json b/data/json/DLP/899586.json new file mode 100644 index 0000000000000000000000000000000000000000..cabd8ce4da6edb62942850643855062f2305d46e --- /dev/null +++ b/data/json/DLP/899586.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "899586", + "reporterName" : "user5958722", + "rankPoints" : "60", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ25703A: protect circuit", + "rankName" : "Prodigy", + "replies" : " 5", + "views" : " 33", + "queryText" : "Part Number: BQ25703A Hicompany engineer, I am in a puzzle about the schematic in PMP40294 Reference Design Board. It's protect circuit has NetLable named GG_CHG and GG_DSG, they don't have a corresponding lable in the schematic. Could you please explain a little about the working principle of the circuit in the picture below? especially why choose the CELL1 as the Q12's Grid, and how GG_CHG or GG_DSG refluce the charge and discharge process. Thanks a lot!", + "partNumber" : " BQ25703A", + "allResponseList" : [ { + "contentId" : "3327470", + "userName" : "Tiger Zhou", + "rankPoints" : "610", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 7:05 PM", + "userId" : "1451791", + "content" : "It looks like part of the schematic is missing. Let me check with the circuit designer." + }, { + "contentId" : "3327724", + "userName" : "Richard Yin", + "rankPoints" : "230", + "rankName" : "Prodigy", + "date" : "Apr 25, 2020 1:52 AM", + "userId" : "5786078", + "content" : "Hi, The designer of this project was no longer in TI. Let me look for other guy to figure it out. Will reply you once I got it. Regards, Richard" + }, { + "contentId" : "3327860", + "userName" : "user5958722", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 25, 2020 2:34 PM", + "userId" : "5958722", + "content" : "Thank you for taking the time out of your busy schedule to help me answer my doubts . Thanks again!" + }, { + "contentId" : "3328260", + "userName" : "David Ji", + "rankPoints" : "500", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 3:58 AM", + "userId" : "3497304", + "content" : "Hi, Friend, If we see the schematic, this block is connected to battery pack. Usually, this block will contain gas gauge IC, back-to-back FET, and battery. Original design is planning to add the circuit of gas gauge IC, back-to-back FET. With some reason the designer removed this part(U7 is not soldered on the board). However, it doesn't affect us to evaluate the whole system. The below reserved schematic will help you understand how these block work. Hope this will help. If you are interested in the gas gauge part, please check the BQ3060." + }, { + "contentId" : "3328616", + "userName" : "user5958722", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 11:05 AM", + "userId" : "5958722", + "content" : "Thank you very much. I have learned a lot from this schematic.company engineers are awesome！" + } ], + "tags" : [ "/support/power-management/f/196/tags/PMP40294", "/support/power-management/f/196/tags/BQ25703A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899604.json b/data/json/DLP/899604.json new file mode 100644 index 0000000000000000000000000000000000000000..7bc7a9428e529d71c0c4ddc2439b7de44571a147 --- /dev/null +++ b/data/json/DLP/899604.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899604", + "reporterName" : "HS WG-FAE", + "rankPoints" : "24290", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS92830-Q1: TPS92830 with 4 channels", + "rankName" : "Mastermind", + "replies" : " 1", + "views" : " 16", + "queryText" : "Part Number: TPS92830-Q1 Hello, customer is searching for a RGBW LED driver like the TPS92830 but with 4 channels for RGB + W. Regards, Holger", + "partNumber" : " TPS92830-Q1", + "allResponseList" : [ { + "contentId" : "3326475", + "userName" : "Frank Qiu", + "rankPoints" : "3995", + "rankName" : "Expert", + "date" : "Apr 24, 2020 1:31 AM", + "userId" : "6106883", + "content" : "Hi Holger, TPS92830-Q1 is a 3 channel LED controller. And we only have one controller in road map. i recommend you to notice TP292638-Q1 and 4 pcs of TPS9261X-Q1 to individually control." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS92830_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899611.json b/data/json/DLP/899611.json new file mode 100644 index 0000000000000000000000000000000000000000..77ddc13d12e51da5a92b18693c788f54551c6cb2 --- /dev/null +++ b/data/json/DLP/899611.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899611", + "reporterName" : "sammy mcdup", + "rankPoints" : "60", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS55165Q1-EVM: How to enable IGN_PWRL function and SS_EN", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 24", + "queryText" : "Part Number: TPS55165Q1-EVM I want to use the TPS55165Q1 IC with the following settings: 1- Normal Mode ( Always ) with output 12v fixed. 2- Power latch on ( always on even if battery voltage drop during crank ) , without external micro-controller signal if possible . using a pull up or pull down is preferred . 3- with Spread-Spectrum enabled to reduce EMI . Problem 1: I have problem understanding how to connect IGN_PWRL IN TPS55165Q1-EVM (SLVUAY1) The schematic shows that inorder to enable the Power latch , the jumper should be connected to GND. while in datasheet it says in the pin description of IGN_PWRL:\" Logic-level IGN power-latch signal. The IGN pin is latched when this pin is high (1) and is not latched when this pin is low (0). So what is the correct way of connecting this pin ? Problem 2: SS_En The datasheet and EVM document states that: This feature can only be enabled when the device is in normal mode with step-down operation. So if i leave this pin unconnected ( SS enabled ) Does this means that during operation in boost mode ( Vin < 12v) this feature is disable automatically and the device continue working normally ? Or Does it mean that when operating in boost mode ( Vin < 12v) this device will be disable because SS is enabled ?", + "partNumber" : " TPS55165Q1-EVM", + "allResponseList" : [ { + "contentId" : "3326480", + "userName" : "Helen chen", + "rankPoints" : "32965", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 1:33 AM", + "userId" : "4197150", + "content" : "Dear Sir. 1. For the feature of IGN_PWRL, please check datasheet \"8.4.3 Power-Up and Power-Down Sequences\", it is easy for you to understand it; 2. SS_En: Yes, the frequency dithering function only valid in buck mode. The frequency will keep unchanged when Vin you can use 10k-100k ohm, either one is OK. b) you didn't acknowledge why does the EVM has Latch jumper connect to GND , to enable this feature . --> Sorry for the confusion, this is a mistake in the schematic. It should be marked as unlatch. 2. SS_EN , when you said \" The frequency will keep unchanged when Vin Yes, the device will work properly but at a fixed frequency." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS55165Q1_2D00_EVM", "/support/power-management/f/196/tags/power" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899614.json b/data/json/DLP/899614.json new file mode 100644 index 0000000000000000000000000000000000000000..a306a2e5ecd4aaf71334add49e3d053b50cd93e9 --- /dev/null +++ b/data/json/DLP/899614.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899614", + "reporterName" : "Yoshiki Ochi", + "rankPoints" : "1150", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS55332EVM: How we calculate C10 and R10 value for loop stability?", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 21", + "queryText" : "Part Number: TPS55332EVM Hi team, Could you tell me how we calculate and modify C10 and R10 value for loop stability in TPS55332EVM datasheet? I added large input capacitor (for Vbat) and large output capacitor (for Vout). Then TPS55332EVM does not work and COMP pin oscillated. I guess it is due to loop stability. Regards, Ochi", + "partNumber" : " TPS55332EVM", + "allResponseList" : [ { + "contentId" : "3327482", + "userName" : "Youhao Xi", + "rankPoints" : "39085", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 7:22 PM", + "userId" : "1880260", + "content" : "Hi Ochi-san, I notify our expert who is in a different time zone where is already the weekend now. The datasheet gives instruction of these component selection in section 8.2.2.8, in which C8 corresponds to C10 of the EVM. R10 is to introduce additional zero but it seems not needed according to datasheet discussion on the example design. Hope this clarifies. Thanks, Youhao Xi, Applications Engineering" + }, { + "contentId" : "3328315", + "userName" : "Yoshiki Ochi", + "rankPoints" : "1150", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 5:46 AM", + "userId" : "5987528", + "content" : "Hello Xi, Could you please explain how we use/understand below figure? I am lack of knowledge for pole, zero, and compensation circuit. Could you give me training resources for them? Regards, Ochi" + }, { + "contentId" : "3329498", + "userName" : "Youhao Xi", + "rankPoints" : "39085", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 9:00 PM", + "userId" : "1880260", + "content" : "Hi Ochi-san, There iscompany online training course at the following link. /control-smps-loop-transfer-functions?keyMatch=LOOP%20COMPENSATION&tisearch=Search-EN-everything You may also refer to a control theory text book to get some fundamental theory. Best Regards, Youhao" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS55332EVM" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899617.json b/data/json/DLP/899617.json new file mode 100644 index 0000000000000000000000000000000000000000..f5834b2c21fb6ae9d1a77462b33635f247236623 --- /dev/null +++ b/data/json/DLP/899617.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "899617", + "reporterName" : "ravi yadav", + "rankPoints" : "60", + "resolutionStatus" : "", + "ticketName" : "TPS54824: Interpretation of the Transient Analysis", + "rankName" : "Prodigy", + "replies" : " 5", + "views" : " 93", + "queryText" : "Part Number: TPS54824 I have been trying to predict the Phase margin for my design, Came across App note /.../slva381 The note describes to verify Phase margin of Regulator by counting the number of Bumps in the Step response. So, I got Transient model of the part TPS54284 and simulated the step response. The step response looks like Now, This Step response don't have any Bumps and As per the App note the Phase Margin should be >50 degrees (1 bump or less). But, When i got the average model and simulated, the Phase margin, I got is in 20s of degrees. So,My question are 1. On the model itself, Is the result are due to discrepancy in the Transient and Average models of the part (i simulated using TINA TI) ? 2. What should be inferred, the whole process of verifying the bumps is not accurate,(difference in phase margin is in range of at least 30 degrees) ? 3. Could the Transient behavior (more intuitive) which looks free of any ringing be taken as final word, although the Average model predicts low (23 degrees)phase margin ?", + "partNumber" : " TPS54824", + "allResponseList" : [ { + "contentId" : "3326078", + "userName" : "Anthony F", + "rankPoints" : "30845", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 5:48 PM", + "userId" : "1559531", + "content" : "Hi Ravi, I'm surprised to see such a big discrepancy between the models. Could you send me the files you used for this simulation?" + }, { + "contentId" : "3326096", + "userName" : "ravi yadav", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 6:02 PM", + "userId" : "4586776", + "content" : "Hi Anthony, I'm afraid i can't send you the files as it's controlled. However, If you could share your email, perhaps i could provide some inputs. Thanks Ravi" + }, { + "contentId" : "3326358", + "userName" : "Gerold Dhanabalan - Online Design Tools", + "rankPoints" : "8770", + "rankName" : "Expert", + "date" : "Apr 23, 2020 10:49 PM", + "userId" : "1132529", + "content" : "Hi Ravi, You can send it to me at g-dhanabalan@ and I will loop Anthony in. Regards, Gerold" + }, { + "contentId" : "3326674", + "userName" : "ravi yadav", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 6:06 AM", + "userId" : "4586776", + "content" : "Thank you Gerold. Dropped you mail on this. Regards Ravi" + }, { + "contentId" : "3327080", + "userName" : "Gerold Dhanabalan - Online Design Tools", + "rankPoints" : "8770", + "rankName" : "Expert", + "date" : "Apr 24, 2020 1:58 PM", + "userId" : "1132529", + "content" : "Thanks Ravi. Got your email and looped Anthony in. Regards, Gerold" + } ], + "tags" : [ "/support/power-management/f/196/tags/gain_2F00_phase%2bmargin", "/support/power-management/f/196/tags/Transient%2bModel", "/support/power-management/f/196/tags/TPS54824", "/support/power-management/f/196/tags/average%2bmodel", "/support/power-management/f/196/tags/ringing" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899620.json b/data/json/DLP/899620.json new file mode 100644 index 0000000000000000000000000000000000000000..48a8d97d6cd7d2caf3b3acd6d7fddce937289574 --- /dev/null +++ b/data/json/DLP/899620.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899620", + "reporterName" : "Stephen Craig", + "rankPoints" : "380", + "resolutionStatus" : "", + "ticketName" : "DLP2010: Shifted image on powerup.", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 44", + "queryText" : "Part Number: DLP2010 Hi, Our current setup is a third-party projector using a DLP2010 DMD, being driven by thecompany LightCrafter EVM (DLPDLCR2010EVM, using DLPC3435, DLPA2010 chip-set). The projector is connected to the LightCrafter with a customer connector. We've also been able to reproduce the issue in another setup, using our own hardware, which use the DLPC3430, and DLPA2000 chip-set (which do not use the custom connector I previously mentioned). The issue is that when we continually re-power / reset the device we are seeing a missing column of data, and the image is shifted but still in the correct order. When we change the image, this artifact remains. I've included two pictures, from the Lightcrafter setup. The first picture is the correct test pattern, which was shown on reset. The second image is the what was displayed when we reset again. The issue does not occur all the time. It takes several resets to reproduce the issue. Please let me know if you have any questions, or if there is any more information that I can provide. Thank you very much for your time. Kind Regards, Stephen Craig Design Engineer Avalon Holographics stephen.craig@avalonholographics.com Correct Test Pattern Test Pattern with Error", + "partNumber" : " DLP2010", + "allResponseList" : [ { + "contentId" : "3326238", + "userName" : "Vivek Thakur", + "rankPoints" : "9880", + "rankName" : "Genius", + "date" : "Apr 23, 2020 8:57 PM", + "userId" : "9052", + "content" : "Hello Stephen, I have several follow-up questions: 1. What version of firmware you are using? 2. How is test pattern sent? 3. Is missing column in same location or changes? Does it happy with any test pattern? If yes, could you please run experiment with checker board pattern? 4. you wrote - \"The issue is that when we continually re-power / reset the device we are seeing a missing column of data, and the image is shifted but still in the correct order. When we change the image, this artifact remains. \" Once this problem occurs, it behaves same way for all inputs i.e one column is missing all the time. regards, Vivek" + }, { + "contentId" : "3328116", + "userName" : "Stephen Craig", + "rankPoints" : "380", + "rankName" : "Intellectual", + "date" : "Apr 26, 2020 4:16 PM", + "userId" : "5308943", + "content" : "Hi Vivek, I'm still waiting to here he firmware version from one of my colleagues. To answer the rest of your questions: 2. The test pattern shown is the default splash screen that comes up with the projector is powered on. 3. The missing column location does remain the same. 4. Yes, when we power up and the error condition is present it remains there until the projector is powered down. I will get back to you as soon as I know the firmware revision number. Kind Regards, Steve C." + }, { + "contentId" : "3328862", + "userName" : "Navneet Singh", + "rankPoints" : "4275", + "rankName" : "Expert", + "date" : "Apr 27, 2020 2:10 PM", + "userId" : "4730519", + "content" : "Hi Steve, Can you send me the patterns in a zip file, i will try to do the same at my end. How many splash images you are adding in the firmware ? How you are updating the splash images in firmware? Thanks, Navneet" + } ], + "tags" : [ "/support/dlp/f/94/tags/DLPA2000", "/support/dlp/f/94/tags/DLPDLCR2010EVM", "/support/dlp/f/94/tags/DLPC3435", "/support/dlp/f/94/tags/DLP2010", "/support/dlp/f/94/tags/DLPC3430" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899625.json b/data/json/DLP/899625.json new file mode 100644 index 0000000000000000000000000000000000000000..ecd1b37ae2daf18fd75c0c5cf068134801f39949 --- /dev/null +++ b/data/json/DLP/899625.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899625", + "reporterName" : "Taoran Jiang", + "rankPoints" : "730", + "resolutionStatus" : "", + "ticketName" : "BQ24725A: High side MOS Vgs rises abnormally", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: BQ24725A Hi team, My customer now uses BQ24725A and find that when Vgs ramp up, the waveform is not one-way up. Please see the following waveform. The purple one is the Vgs,and the yellow is the voltage of BSTS pin and PHASE pin. And the boot cap value they use is 47nF. Can you help me with this issue? Thanks!", + "partNumber" : " BQ24725A", + "allResponseList" : [ { + "contentId" : "3326227", + "userName" : "Angelo Zhang87", + "rankPoints" : "6530", + "rankName" : "Expert", + "date" : "Apr 23, 2020 8:45 PM", + "userId" : "5346700", + "content" : "Hi, Thanks for the question. I'd like to gather some more information to help investigate this further: Can you please share the schematic? What is the adapter voltage, and what are the load conditions (battery voltage, battery current, and is there a system load connected)? Can you please capture two waveforms showing BTST, PHASE, HIDRV, and LODRV? It would be helpful to see a slightly zoomed out waveform showing several switching cycles, as well as a zoomed in waveform which clearly shows the glitch (similar to the waveform you sent). Despite the glitch in the rising edge, it looks like the converter is still switching successfully. Is the charger working as expected aside from this glitch? Best regards, Angelo" + } ], + "tags" : [ "/support/power-management/f/196/tags/bq24725A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899631.json b/data/json/DLP/899631.json new file mode 100644 index 0000000000000000000000000000000000000000..07f874da0e7c10b8dc594a44a1312dc80a3b1c96 --- /dev/null +++ b/data/json/DLP/899631.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899631", + "reporterName" : "LEANDRO SCHMITZ", + "rankPoints" : "170", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS2HB35-Q1: PWM Max frequency", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 26", + "queryText" : "Part Number: TPS2HB35-Q1 Hello, I'd like to use TPS2HB35-Q1 to control a hydraulic proportional valve. And I'd like to know how is the maximum frequency for PWM My idea is to apply a 1KHz PWM and use internal current sense as the input of a PID to control the current and oil flow through the valve. Thank you for help.", + "partNumber" : " TPS2HB35-Q1", + "allResponseList" : [ { + "contentId" : "3325873", + "userName" : "Anthony P Pham", + "rankPoints" : "1890", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 3:43 PM", + "userId" : "6169362", + "content" : "Hi Leandro, The maximum frequency will depend on your load. I won't be able to give you the proper maximum frequency as I do not have that information. Unfortunately, some calculations show that you won't be able use a 1kHz frequency PWM with this device. If you do need 1 kHz and can provide more information about your load, I can potentially give you a different 2CH device recommendation." + }, { + "contentId" : "3326173", + "userName" : "LEANDRO SCHMITZ", + "rankPoints" : "170", + "rankName" : "Prodigy", + "date" : "Apr 23, 2020 7:41 PM", + "userId" : "5796586", + "content" : "The actual system work with 2 types of valves, one of 1.2A and other with 3A. It uses a discrete low side with 1KHz of PWM for 1.2A and a lower frequency for 3A valve. The current monitor is done with a shunt resistor and a current sense amplifier. 1- 1.2A Coil Valve 2- 3A Coil Valve I'd like to do the current control with a high side, max current of 4A. I appreciate your recommendation. Thank you" + }, { + "contentId" : "3327527", + "userName" : "Anthony P Pham", + "rankPoints" : "1890", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 8:29 PM", + "userId" : "6169362", + "content" : "Hi Leandro, Thanks for the information. If you have just one channel at 1kHz, this will do much better. You'll be able to work with the TPS2HB35-Q1 devices with your 3A valve at 90Hz with your 1.2A valve at 1kHz if you need the 4A limit Another device that could work is the TPS2HB16 if you're ok with a typical current limit of 4.1A. This'll bring your frequency on the 3A to 400Hz. These recommendations are based on calculations you can find in this app note and assumed an ambient temperature of 105C. If you have more information about your load conditions such as ambient temperature that the device will be operating in, I can adjust the calculations for you." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS2HB35_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899632.json b/data/json/DLP/899632.json new file mode 100644 index 0000000000000000000000000000000000000000..964f732304a03e30b4626908a5cbae09c60c2f03 --- /dev/null +++ b/data/json/DLP/899632.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "899632", + "reporterName" : "David Naviaux", + "rankPoints" : "360", + "resolutionStatus" : "", + "ticketName" : "LM3409: Shunt MOSFET PWM with output capacitor", + "rankName" : "Intellectual", + "replies" : " 4", + "views" : " 18", + "queryText" : "Part Number: LM3409 Hi, I have an application that requires a very fast turn-on and turn-off time (<20us ideally) but also a very low LED ripple current (< 30mA at 4A LED current). To get that low of a ripple, I think that I will need to use an output capacitor. However, that presents a problem with using a shunt MOSFET for PWM dimming. Does anyone out there of some suggestions? Thank you, David", + "partNumber" : " LM3409", + "allResponseList" : [ { + "contentId" : "3325651", + "userName" : "Irwin Nederbragt", + "rankPoints" : "20765", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 1:35 PM", + "userId" : "1880111", + "content" : "Hello David, One thing this will depend on is Shunt FET dimming frequency. There can be an output capacitor when Shunt FET dimming, it becomes switching loss for the Shunt FET. It will also cause a turn-on delay when recharging the capacitor. Larger inductor value will make lower current ripple requiring less capacitance. The other option is to use standard PWM with a lower inductor value. The turn-on time will be V = L * (di/dt), where V = Vin - Vled. The turn-off will be the same equation where V = Vled. If this is your low output voltage application the turn-off will be longer then you turn-on. What is your PWM frequency? Output voltage? Output current range? Input voltage? Best Regards," + }, { + "contentId" : "3325691", + "userName" : "David Naviaux", + "rankPoints" : "360", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 2:08 PM", + "userId" : "51079", + "content" : "Hi Irwin, The PWM frequency has not been specified by my client, but earlier versions of similar products can be switched at frequencies > 10kHz with a turn-on time < 10us. I expect that a switching frequency of a few kHz would be okay. The design specifications are as follows: Programmable current range: 250mA to 4A LED voltage range: 1.5V to 6.5V (at 90% efficiency, a duty cycle range of 6.6% to 30%) Input voltage: 24V ± 5% Maximum turn-on/off times need to be < 20 us or so. My PWM frequency would be limited to < 300 kHz or so due to the 210 nS minimum on time of the LM3409. Thank you, David" + }, { + "contentId" : "3325919", + "userName" : "Irwin Nederbragt", + "rankPoints" : "20765", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 4:04 PM", + "userId" : "1880111", + "content" : "Hello David, I don't see the LM3409 reaching 90% efficiency with low output voltages. This part become efficient when Vout approaches Vin. A synchronous part makes more sense for this however the part we have, TPS92641, has the current sense on the low side. You mentioned synchronous with the LM3409, since it is a P-channel drive referenced to Vin the gate drive circuit becomes a little more complicated. I don't see an easy solution yet. Best Regards," + }, { + "contentId" : "3325971", + "userName" : "David Naviaux", + "rankPoints" : "360", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 4:31 PM", + "userId" : "51079", + "content" : "Hi Irwin, I'll put some design effort into coming up with an appropriate driver for the diode replacement MOSFET and see what I can come up with. Thanks, David" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM3409" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899641.json b/data/json/DLP/899641.json new file mode 100644 index 0000000000000000000000000000000000000000..a053ead9dfd79c85fffba352415df8b11539f860 --- /dev/null +++ b/data/json/DLP/899641.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899641", + "reporterName" : "HS WG-FAE", + "rankPoints" : "24290", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS65218D0: TPS65218D0 off-state problem", + "rankName" : "Mastermind", + "replies" : " 2", + "views" : " 10", + "queryText" : "Part Number: TPS65218D0 Hello, my customer is using PMIC TPS65218 in their application and it was running well. He switched to the new TPS65218D0 now and got into a problem which stopped the production! The problem is that in a specific configuration when the application is switched off still a parasitic current occurs on the BIAS and DCDC input terminals of the PMIC (see attachment). Now the D0 PMIC is going into the OFF state after a period of 1-20s and states there, no chance leave this state. Only the push button or a reset helps. The non-D0 version wasn't going into this OFF state. - Is there a difference in the D0 and non-D0 version which leads to this problem? - To ensure that the PMIC comes out of the off-state the customer has to make sure that DCDC5 and DCDC6 are also active in the off state. To do so the FSEAL- bit has to be configured. Is this possible withouth a Coil Cell Supply or is the bit reseted in the off-state. Regards, Holger", + "partNumber" : " TPS65218D0", + "allResponseList" : [ { + "contentId" : "3325809", + "userName" : "Brian Berner", + "rankPoints" : "26215", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 3:13 PM", + "userId" : "1859421", + "content" : "Holger, Sorry, but what am I looking at in this scope shot? What pin are you probing and when are you probing it? I don't really have a point of reference here. It would be nice to see PWR_EN pin and at least one DCDCx output voltage in the same capture. If you are saying keeping DCDC5/6 on helps, it would also be helpful to show DCDC5 or DCDC6 (a) when you are experiencing the issue, and (b) when there is no issue. Please use all 4 channels on the scope to provide some context. Leaving the OFF state depends on 4 events: VIN_BIAS > (VUVLO + hysteresis) & (PB low || AC_DET low || PWR_EN = high) In order to determine if the issue you are seeing is expected behavior, I need to know the state of these 4 pins at the time when you expect the PMIC to turn back on." + }, { + "contentId" : "3325831", + "userName" : "Brian Berner", + "rankPoints" : "26215", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 3:20 PM", + "userId" : "1859421", + "content" : "Holger, To answer your questions: HS WG-FAE - Is there a difference in the D0 and non-D0 version which leads to this problem? No, feel free to review the TPS65218 (-B1) to TPS65218D0 changes, attached here and also in our FAQ section. 2577.TPS65218xx_Rev_history.pdf HS WG-FAE Is this possible withouth a Coil Cell Supply or is the bit reseted in the off-state. If there is no voltage present on the CC pin, it will reset to 0b automatically after you set to 1b. However, a physical coin cell is not required. You can also use a resistor divider to generate 3V nominal at the CC pin from the main input voltage. 3V = 5V*R2/(R1 + R2) --> R2 = 100k, R1 = 67k" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS65218", "/support/power-management/f/196/tags/TPS65218D0" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899642.json b/data/json/DLP/899642.json new file mode 100644 index 0000000000000000000000000000000000000000..6443445c86b2b23b90e7d8850be4f703e71e6181 --- /dev/null +++ b/data/json/DLP/899642.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "899642", + "reporterName" : "Ian Wang", + "rankPoints" : "15535", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM3646: LM3646", + "rankName" : "Genius", + "replies" : " 12", + "views" : " 35", + "queryText" : "Part Number: LM3646 Hi Sir, My customer looking for IR LED driver, control by Flash. Could you pls advise if LM3646 is suitable one? Thanks. Vendor OSRAM OSRAM P/N SFH 4725AS A01 SFH 4180S Forward voltage(V) 2.65(@1A), 3.65max 2.95(@1A), 3.3max Usage amount 3PCS 4~6PCS Thanks, Ian.", + "partNumber" : " LM3646", + "allResponseList" : [ { + "contentId" : "3325690", + "userName" : "Sean Zhou", + "rankPoints" : "17030", + "rankName" : "Genius", + "date" : "Apr 23, 2020 2:07 PM", + "userId" : "3704", + "content" : "Hi Ian, For IR LED driver application with a fast response time requirement, I strongly recommend our LM3643/LM3644(two-channel) or LM36010/LM36011(single channel). Because those device has integrated the IR mode which can respond with the \"STROBE\" pin very quickly. It means that you put the trigger signal to the \"STROBE\" pin and it can respond very quickly. BR Sean" + }, { + "contentId" : "3326900", + "userName" : "Ian Wang", + "rankPoints" : "15535", + "rankName" : "Genius", + "date" : "Apr 24, 2020 10:19 AM", + "userId" : "12993", + "content" : "Hi Sean, Some questions as following, IR mode which can respond with the \"STROBE\" pin very quickly Q. What is the raising and falling time? 2. For SFH 4725AS 3PCS use a LM3644, and a LM36011 is OK. Q. customer will need to use 2 LM3644, and 2 LM36011, if there are two I2C address for each part? 3. There are three mode in IR Mode: Boost, Pass Only, Timeout Q. Timeout mode is not suitable for customer . What is the difference between Boost and Pass Only mode? Thanks, Ian." + }, { + "contentId" : "3326941", + "userName" : "Sean Zhou", + "rankPoints" : "17030", + "rankName" : "Genius", + "date" : "Apr 24, 2020 11:36 AM", + "userId" : "3704", + "content" : "Hi Ian, Here is a great AN that can answer your most questions. /lit/an/snva773/snva773.pdf For LM3644, you can use LM3644+LM3644TT they have different addresses, but for LM36010, there is only one I2C address. Boost mode means it will switch and Vin is not enough to driver output LED under a special current. Pass mode is like LDO mode which means the Vin is higher than Vout and internal switched will not switch. BR Sean" + }, { + "contentId" : "3328239", + "userName" : "Ian Wang", + "rankPoints" : "15535", + "rankName" : "Genius", + "date" : "Apr 27, 2020 3:26 AM", + "userId" : "12993", + "content" : "Hi Sean, We can find the i2c slave address of LM3644(0x63),but cannot find address of LM3644TT. What is the address of LM3644TT? 2. 3PCS SFH 4725AS is OK for driven by LM3644+ LM36011 But SFH 4180S just only can drive 5PCS by LM3644+ LM3644TT +LM36011, do you have any countermeasure? Vendor OSRAM OSRAM P/N SFH 4725AS SFH 4180S Forward voltage(V) 2.9(@1A), 3.4max 2.95(@1A), 3.3max Usage amount 3PCS 6PCS Thanks,Ian." + }, { + "contentId" : "3328503", + "userName" : "Sean Zhou", + "rankPoints" : "17030", + "rankName" : "Genius", + "date" : "Apr 27, 2020 8:51 AM", + "userId" : "3704", + "content" : "Hi Ian, 1. I'm sorry that LM3644TT has the same I2C address with LM3644, But you can try with LM3643 and LM3643A which has the different I2C address wit LM3643; 2. LM3643+LM3643A+LM36011 may be a good solution for 5 pcs LEDs. BR Sean" + }, { + "contentId" : "3329921", + "userName" : "Ian Wang", + "rankPoints" : "15535", + "rankName" : "Genius", + "date" : "Apr 28, 2020 5:34 AM", + "userId" : "12993", + "content" : "Hi Sean, Thanks. Do you have solution for 6PCS IR LED SFH 4180S? Vendor OSRAM P/N SFH 4180S Forward voltage(V) 2.95(@1A), 3.3max Usage amount 6PCScompany solutions ? Thanks, Ian." + }, { + "contentId" : "3329938", + "userName" : "Sean Zhou", + "rankPoints" : "17030", + "rankName" : "Genius", + "date" : "Apr 28, 2020 5:52 AM", + "userId" : "3704", + "content" : "Hi Ian, What's the supply voltage? And how about the LED configuration? All serially connected or can be connected parallelly? I would recommend TPS54201 first. BR Sean" + }, { + "contentId" : "3329978", + "userName" : "Ian Wang", + "rankPoints" : "15535", + "rankName" : "Genius", + "date" : "Apr 28, 2020 6:33 AM", + "userId" : "12993", + "content" : "Hi Sean, Serially is better, but can also consider others. supply voltage is 3.2~5CV. TPS54201 is still the better solution? Thanks, Ian." + }, { + "contentId" : "3329985", + "userName" : "Sean Zhou", + "rankPoints" : "17030", + "rankName" : "Genius", + "date" : "Apr 28, 2020 6:44 AM", + "userId" : "3704", + "content" : "Hi Ian, No, TPS54201 is a buck topology LED driver, for this kind of high current application, usually, it will use buck topology. If you are considering the boost LED driver, it may need a LED controller, from our team, you can try with TPS61500. BR Sean" + }, { + "contentId" : "3329992", + "userName" : "Ian Wang", + "rankPoints" : "15535", + "rankName" : "Genius", + "date" : "Apr 28, 2020 6:48 AM", + "userId" : "12993", + "content" : "Hi Sean, Thanks for information You means use TPS61500 be a solution for 6PCS IR LED SFH 4180S? Thanks, Ian." + } ], + "tags" : [ "/support/power-management/f/196/tags/LM3646" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899643.json b/data/json/DLP/899643.json new file mode 100644 index 0000000000000000000000000000000000000000..2723823a13ae34947d2347f7b02a2069a2bcedd5 --- /dev/null +++ b/data/json/DLP/899643.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "899643", + "reporterName" : "David Naviaux", + "rankPoints" : "360", + "resolutionStatus" : "", + "ticketName" : "LM3409: Can I replace the recirculating diode with a MOSFET?", + "rankName" : "Intellectual", + "replies" : " 6", + "views" : " 25", + "queryText" : "Part Number: LM3409 Hi, For power efficiency, I would like to replace the recirculating diode with a MOSFET. I realize that I would have to derive a safe gate drive to that mosfet observing proper synchronization and deadtime. Assuming that I can do that, would the controller work properly since now we will always be in CCM (forced CCM when it would normally be operating in DCM)? Thank you, David", + "partNumber" : " LM3409", + "allResponseList" : [ { + "contentId" : "3325671", + "userName" : "Irwin Nederbragt", + "rankPoints" : "20765", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 1:57 PM", + "userId" : "1880111", + "content" : "Hello David, It could work (the LM3409 wouldn't know the difference since it's regulating peak current) however I would look at the TPS92641 if you are considering this. There are a lot of operating conditions to check if doing this. Shunt FET dimming operation would need a close look at on-time/off-time to prevent current runaway. I would have to find out about negative voltage on the current sense. Best Regards," + }, { + "contentId" : "3325731", + "userName" : "David Naviaux", + "rankPoints" : "360", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 2:32 PM", + "userId" : "51079", + "content" : "Thank you again Irwin, I'll look into the TPS92641. Regards, David" + }, { + "contentId" : "3325822", + "userName" : "David Naviaux", + "rankPoints" : "360", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 3:18 PM", + "userId" : "51079", + "content" : "Hello Irwin, I have examined the TPS92641 but the current sense resistor must be grounded which prevents me from driving the cathode grounded LEDs in my application. I know that maybe with an additional, high speed high-common mode differential amplifier, I might be able to move the CS resistor from the cathode to the LED anode, but there are several design issues that would have to be addressed and my application is very cost sensitive. My design will include 20 independant LED drivers (each with their own controller and separate iAdj inputs). All LEDs will be turned on/off at the same time, if PWM control is to be used. The design will be air cooled (with a fan) and cannot have any additional heat sink. Each driver will be capable of outputting 26W (4A at 6.5V) and must turn on/off within 20us. I was trying to avoid the recirculating diode because of the high power dissipation (4A * 0.6V or so, about 2.2W at my lowest duty cycle of 7%). The diode alone reduces the efficiency by about 8% and will require some very thoughtful thermal management. I could parallel two diodes at a minimum risk of thermal runaway since they will be sharing heat, but at an increased cost and PCB real estate. The two-diode solution would still dissipate about 1.6W total. Do have any thoughts about this? Thanks, David" + }, { + "contentId" : "3325901", + "userName" : "Irwin Nederbragt", + "rankPoints" : "20765", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 3:54 PM", + "userId" : "1880111", + "content" : "Hello David, Unfortunately a non-synchronous buck running at low output voltage and low duty cycle will have lower efficiency because of the freewheel diode Vf. I'm not sure of your input voltage range, if it is fixed at 24V I would consider looking for a low Vf 30V diode or diode pair. Vf can be around 0.3V, as it heats Vf will drop however reverse leakage goes up so looking at all operating ranges is important. Letting the diodes run at higher temperature is a way to improve efficiency. Adding the synchronous MOSFET (and additional circuitry) will add cost as well. Do you have a switching frequency range you are considering for this? LM3409 is variable switching frequency. Best Regards," + }, { + "contentId" : "3325966", + "userName" : "David Naviaux", + "rankPoints" : "360", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 4:28 PM", + "userId" : "51079", + "content" : "Irwin, The switching frequency has not been specified, but because of the 1.5V minimum output voltage and 24V input requirements, the minimum Ton time of 210ns limits the maximum frequency to about 300 kHz. I also realize that the variation in output voltage will result in a frequency change that is dependent on the output voltage (which can be from 1.5V to 6.5V). With a few calculations and a fixed Toff time of 3us, the switching frequency would be between 230kHz and 310kHz, depending on the output voltage. I will plan on using two parallel diodes and with PCB testing, maybe I could DNP one of them. My original design was using a sync. buck voltage mode controller (as opposed to a peak current model controller) with LED current as feedback. But I was not able to meet the turn-on/off time requirement and there was a lot of analog \"glue\" circuitry and control loop compensation issues that added cost and PCB real estate. The final PCB will drive 20 independant LEDs. I'm not sure about interference between the drivers since there is not synchronization on their load of the input power (I had all 20 drivers interleaved in my previous design). The only other issue is that I must be able to parallel the outputs of all drivers (i.e. 80A output into an array of paralleled LEDs). I didn't see an issue with that concerning the LM3409, but maybe I am missing something. Thank you, David" + }, { + "contentId" : "3326004", + "userName" : "Irwin Nederbragt", + "rankPoints" : "20765", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 4:58 PM", + "userId" : "1880111", + "content" : "Hello David, The LM3409 is a current source, you should be able to parallel them. The current sense is before the inductor feeding a fixed voltage so there should be no issue if they aren't synchronized though the ripple current in the LEDs may look a bit odd. Best Regards," + } ], + "tags" : [ "/support/power-management/f/196/tags/LM3409" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899646.json b/data/json/DLP/899646.json new file mode 100644 index 0000000000000000000000000000000000000000..a8216067b58c71ae36357d7fb73ba3f96b8ba1aa --- /dev/null +++ b/data/json/DLP/899646.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899646", + "reporterName" : "sayyad dhalayat", + "rankPoints" : "10", + "resolutionStatus" : "", + "ticketName" : "TPS22916: TPS22916", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 7", + "queryText" : "Part Number: TPS22916 I'm unable to access the TPS22196 Tina Schematic available in the website. How can i get this schematic? Plz help me to get it", + "partNumber" : " TPS22916", + "allResponseList" : [ { + "contentId" : "3326209", + "userName" : "Andy Robles", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 8:18 PM", + "userId" : "6043129", + "content" : "Hi, Welcome to E2E! For this device a TINA-TI schematic was not created. What is available on the product folder will be the PSPICE model of all the different versions of the device. I hope this helps! Best regards, Andy Robles" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS22916" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899649.json b/data/json/DLP/899649.json new file mode 100644 index 0000000000000000000000000000000000000000..3261084040175bc544afd222480a337d0fe7d982 --- /dev/null +++ b/data/json/DLP/899649.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899649", + "reporterName" : "Sunset", + "rankPoints" : "11860", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS3890: TPS389018 - MR pin voltage while Vdd is floating/not available", + "rankName" : "Genius", + "replies" : " 1", + "views" : " 21", + "queryText" : "Part Number: TPS3890 Hello Team, does the TPS389018 have problems if the MR pin get 3.3V while Vdd is not yet getting 3.3V? In particular Vdd and MR voltages, come from two different power supplies. MR gets for short time 3.3V at low impedance (without a pull up resistor), while Vdd is not yet there. By measuring the MR current it looks that only 10uA flows at 3.5V, thus it looks ok. Nevertheless the TPS389018 ESD structure is not clear and is not sure if 10uA will always be that and not higher. Currently a redesign would be needed if a resistor or diode will be added in serie with MR to avoid the problem. can you confirm that 3.3V on MR, without Vdd is not a problem? If a resistor to limit the current is required, to which value must be that current be limited? Thanks for the follow up, SunSet", + "partNumber" : " TPS3890", + "allResponseList" : [ { + "contentId" : "3326708", + "userName" : "Abhinav.Sharma", + "rankPoints" : "6855", + "rankName" : "Expert", + "date" : "Apr 24, 2020 6:35 AM", + "userId" : "4691355", + "content" : "Hi Sunset, /MR should be okay being initiated before Vdd. The RESET will then obviously not be impacted by MR until VDD reaches VDD(min), but there should be non-significant amounts of current sink in this case. This case has not to my knowledge been tested by our team however, so I would ask the customer to verify currents on each pin during operation. Since MR does not require a pullup resistor, it should not in this case as well. Let me know if you have additional thoughts. Thanks, Abhinav." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS3890" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899661.json b/data/json/DLP/899661.json new file mode 100644 index 0000000000000000000000000000000000000000..30104c43eaf0f1e41d1363b7d8ea1ea4fe77fa01 --- /dev/null +++ b/data/json/DLP/899661.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899661", + "reporterName" : "Agate", + "rankPoints" : "790", + "resolutionStatus" : "", + "ticketName" : "CCS/IWR6843: mmWave sensors carrier card platform with ISK6843", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 19", + "queryText" : "Part Number: IWR6843 Tool/software: Code Composer Studio Dearcompany SPI and I2C driving code development with FTDI port ofcompany mmwave carrier board question . We driving SPI or I2C device code of 6843 and will take use the FTDI port ofcompany mmwave carrier board tocompany visualizer GUI for driving code verify . If this method is ok we need to modfiy GUI code or something ? Have some input　？　 BR", + "partNumber" : " IWR6843", + "allResponseList" : [ { + "contentId" : "3326398", + "userName" : "Charles Oladimeji", + "rankPoints" : "26350", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 11:42 PM", + "userId" : "4461477", + "content" : "Hi, You will need to have both Data and User UART COM port to connect with the visualizer. How do you intend to this? BR, Charles O" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR6843", "/support/sensors/f/1023/tags/code%2bComposer%2bstudio" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899669.json b/data/json/DLP/899669.json new file mode 100644 index 0000000000000000000000000000000000000000..f798d3993afe63cddf358e46aae2ea00d3f550b1 --- /dev/null +++ b/data/json/DLP/899669.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899669", + "reporterName" : "Julio AFA", + "rankPoints" : "2455", + "resolutionStatus" : "", + "ticketName" : "TPS40200: Switching frequency variation?", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 9", + "queryText" : "Part Number: TPS40200 Team, We are using the TPS40200DRBT in a current design (36V to 12V buck converter application), and I have a question about switching frequency variability. I have R_rc set as 60.4k and C_rc set as 330pF. The output is stable at 12V, but the switching frequency is ~ 406kHz (I was expecting a switching frequency closer to 477kHz). How much variability can I expect when setting the switching frequency with this part", + "partNumber" : " TPS40200", + "allResponseList" : [ { + "contentId" : "3325992", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 4:45 PM", + "userId" : "1881345", + "content" : "Hello Based on the data sheet it looks like the tolerance could be as high as +/- 15%. However, I would double check your RC components values and tolerance. And also be sure that switching is stable and the device is not in a protection mode such as current limit. Thanks" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS40200" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899672.json b/data/json/DLP/899672.json new file mode 100644 index 0000000000000000000000000000000000000000..eebf4c08c06c3dd7e85948f63f0adaaf58b04936 --- /dev/null +++ b/data/json/DLP/899672.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899672", + "reporterName" : "Lakhal Mohammed", + "rankPoints" : "10", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ24075: general Questions", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 13", + "queryText" : "Part Number: BQ24075 Hi we are using a BQ24075 charger and BQ27441 Fuel Gauge for charge and manage the battery in our application. I have some questions please: 1) can we charge the battery with using only BQ24075 charger (without Fuel gauge)? 2) is the BQ42075 able to stop charging of the battery if it is full charged? or we must use BQ27441 Fuel gauge for that? Thank you", + "partNumber" : " BQ24075", + "allResponseList" : [ { + "contentId" : "3326165", + "userName" : "Raheem", + "rankPoints" : "16655", + "rankName" : "Genius", + "date" : "Apr 23, 2020 7:22 PM", + "userId" : "4697250", + "content" : "Hello, 1) Yes. You can charge the battery without a gauge. 2) Yes. The battery stops charging automatically when the charge current crosses the termination point." + } ], + "tags" : [ "/support/power-management/f/196/tags/bq24075" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899676.json b/data/json/DLP/899676.json new file mode 100644 index 0000000000000000000000000000000000000000..2818de4cc9211cb5e81c134ca2bb810e646072bf --- /dev/null +++ b/data/json/DLP/899676.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "899676", + "reporterName" : "Sajna K", + "rankPoints" : "170", + "resolutionStatus" : "", + "ticketName" : "TPS63020: Need solution for output current 3A", + "rankName" : "Prodigy", + "replies" : " 5", + "views" : " 17", + "queryText" : "Part Number: TPS63020 hi, i have the following buck -boost requirement Vin = 4.5 to 5.5 V Vout=5V Iout 3A. can i use the part TPS63020 with 1uH inductor? if not kindly suggest me a solution", + "partNumber" : " TPS63020", + "allResponseList" : [ { + "contentId" : "3326084", + "userName" : "Milos", + "rankPoints" : "7260", + "rankName" : "Expert", + "date" : "Apr 23, 2020 5:55 PM", + "userId" : "5692358", + "content" : "Hi Sajna, The TPS63020 cannot support 3 A under those conditions. The TPS63802 can, but thermally it might get a bit tight. Is the 3-A output current continuous or in pulses? Best regards, Milos" + }, { + "contentId" : "3326590", + "userName" : "Sajna K", + "rankPoints" : "170", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 3:55 AM", + "userId" : "6015227", + "content" : "Hi Milos, Thank you for the prompt response. 3A is continous. Datasheet of TPS63020 says it supports 4A of switching current. Hence it is supposed to support 3A of load current right? Correct me if i am wrong. i have also checked the datasheet of TPS63802, which says it will supports upto 2A. can you please confirm?. it would be helpful if you confirm me a part for my requirement" + }, { + "contentId" : "3326807", + "userName" : "Milos", + "rankPoints" : "7260", + "rankName" : "Expert", + "date" : "Apr 24, 2020 8:29 AM", + "userId" : "5692358", + "content" : "Hi Sajna, It depends on the device how the switch current limit translates to the maximum output current. The TPS63802 is a newer device, with a higher switch current limit, lower switch Rds,on and better thermal properties than the TPS63020. The TPS63020 cannot support the continuous output current shown in its datasheet in Figure 1. The TPS63802 can support continuous output current shown in its datasheet in Figure 14. However note that this is measured on the TPS63802 EVM at room temperature and with the recommended layout. The TPS63806 can support a bit more current, but it comes in a BGA package. Best regards, Milos" + }, { + "contentId" : "3326821", + "userName" : "Sajna K", + "rankPoints" : "170", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 8:42 AM", + "userId" : "6015227", + "content" : "hi Milos, what would be maximum current TPS63020 would support for 5V output Input is in the range 4.5V to 5.5V. im in the middle of my design with TPS63020 for 2.7A output. Shall i proceed? or need to switch my design to TPS63806? Regards sajna" + }, { + "contentId" : "3326876", + "userName" : "Milos", + "rankPoints" : "7260", + "rankName" : "Expert", + "date" : "Apr 24, 2020 9:49 AM", + "userId" : "5692358", + "content" : "Hi Sajna, At Vin = 4.5 V (worst case), Vout = 5 V, the maximum output current for the TPS63020 is around 2.5 A. The TPS63806 can support 3 A for Vin = 4.5-5.5 V, Vout = 5 V. Best regards, Milos" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS63020" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899681.json b/data/json/DLP/899681.json new file mode 100644 index 0000000000000000000000000000000000000000..45c1110d9a199ad16c49064957fe6e1618976efe --- /dev/null +++ b/data/json/DLP/899681.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899681", + "reporterName" : "Jonathan Geronga", + "rankPoints" : "3280", + "resolutionStatus" : "", + "ticketName" : "TPS65400: TPS65400 VREF Configuration in Fusion Digital Power Designer tool", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 18", + "queryText" : "Part Number: TPS65400 Hi Team, Our customer is having trouble below to configure the default Vref voltage of the device TPS65400 regulator in hid customer board using the Fusion Digital Power Designer tool 1. TPS65400RGZR IC employed on one of the design boards reads a wrong I2C address for a resistor value of 82KOhm. 2. The default Vref voltage is 1.355V instead of 0.8V. I did try to program the IC to default values but of no use though the tool fusion digital power designer tool says successful in storing to NVM. Here's what the customer has done to configure TPS65400 VREF: - connect the device, the tool recognizes the device with the right I2C address - then customer click on the option - click to configure device followed by changing the write protect mode to 0X00 - change the Vref to what's required- write to hardware and then store config to NVM - It says saving device config(RAM) to flash memory - but customer sees the default value even post configuration of the device Let me know if you need more clarification with the customer inquiry. Thanks. Jonathan", + "partNumber" : " TPS65400", + "allResponseList" : [ { + "contentId" : "3326706", + "userName" : "Zhao Ma", + "rankPoints" : "7070", + "rankName" : "Expert", + "date" : "Apr 24, 2020 6:34 AM", + "userId" : "4727719", + "content" : "Hi, Jonathan 1. The issue happened on EVM or customer board?? I ever verified the fusion tool on EVM, it can write/change register successfully by importing .csv file. And I also remember I could change register value manually. I attach a procedure for your reference. And suggest to take a try on another board. 2. And suggest to change I2C address, set I2C ADDR resistor (22.1kohm), then test again. 3. If customer is testing EVM by USB2ANY, there is another file: Fusion verify for TPS65400 report, in page 5, we should set EN2,EN3,EN4 enable on. Fusion verify for TPS65400 report.pptx Fusion import csv file.docx" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS65400" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899687.json b/data/json/DLP/899687.json new file mode 100644 index 0000000000000000000000000000000000000000..73077aa3ffc22ae26305bfe90a068616147ccd16 --- /dev/null +++ b/data/json/DLP/899687.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899687", + "reporterName" : "Kazuhiko Hirano", + "rankPoints" : "4565", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS543C20A: A couple of general questions", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 15", + "queryText" : "Part Number: TPS543C20A Hello, I have a couple of questions about TPS543C20A as follows. Q1: Datasheet says KIND must be kept between 0.1 and 0.3 for balanced performance. However, KIND can be 0 – 200% at WeBench. If KIND is > 0.3, for example KIND is 2.0, what would be wrong? Q2: IOCP is defined as the valley inductor current? So, actual maximum DC current limit is IOCP + 1/2*(Inductor current ripple)? Best regards, K.Hirano", + "partNumber" : " TPS543C20A", + "allResponseList" : [ { + "contentId" : "3326252", + "userName" : "Kris F", + "rankPoints" : "14480", + "rankName" : "Genius", + "date" : "Apr 23, 2020 9:04 PM", + "userId" : "3795855", + "content" : "Hi Hirano-san, A1: Higher Kind, or lower inductor value, is often desirable to allow a physically smaller inductor to be chosen and to improve transient response, since it is easier to slew the inductor current in response to a load transient step with lower inductance. However, lowering the inductance increases the inductor current ripple which will lead to higher output voltage ripple and require more output capacitance to reduce. In addition, the higher inductor current ripple can mean higher AC/core losses, though that may be offset by the lower DCR of smaller inductance. The inductance also shouldn't be so small that the peak current hits the fixed high-side short circuit protection fault threshold (IHSOC) and negative valley current limit (IOCP_N) in normal conditions. A2: IOCP is defined for average inductor current, not valley current, at which OCP will trigger. Equation 3 is subtracting half the inductor current ripple from the peak current limit defined by RILIM resistor. Regards, Kris" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS543C20A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899689.json b/data/json/DLP/899689.json new file mode 100644 index 0000000000000000000000000000000000000000..bcb1e3119ea55e16b31afc1d2edb205a0ae51a32 --- /dev/null +++ b/data/json/DLP/899689.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899689", + "reporterName" : "John LaGreca1", + "rankPoints" : "35", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ28Z610: Reading OperationStatus MAC (0x0054) after seal/unseal minimum delay specification.", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 16", + "queryText" : "Part Number: BQ28Z610 I am performing seals/unseals of the device and upon querrying the OperationStatus MAC (0x0054) after the read to validate the SEC0 SEC1 states to determine the seal/unseal state I require a delay. The minimums I have found are 100ms for seal and 500ms for unseal. The interesting thing is that I have 3 retries on the seal/unseal and the read back of the OperationStatus SEC1 SEC0 . So it seems even if you write the seal/unseal with no state change (sealing a sealed device or unsealing an unsealed device) the security status bits still go into some state of flux. Can you confirm the minimum propagation delay for stable SEC1 SEC0 in OperationStatus after a seal and an unseal is performed?", + "partNumber" : " BQ28Z610", + "allResponseList" : [ { + "contentId" : "3326346", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 10:38 PM", + "userId" : "1864278", + "content" : "Hi John, I don't think we have a spec for that. I suggest you use some empirical data, like what you have found. Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ28Z610" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899692.json b/data/json/DLP/899692.json new file mode 100644 index 0000000000000000000000000000000000000000..a0621171c95560478374b7316917ecd15dad42b8 --- /dev/null +++ b/data/json/DLP/899692.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899692", + "reporterName" : "Renan Santos Adriano", + "rankPoints" : "2795", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS22916: PSPICE .tsc file missing", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 13", + "queryText" : "Part Number: TPS22916 Hi Team, Good day. My customer is looking for the .tsc file of TPS22916C, do we have this file? Thanks in advance. Regards, Renan", + "partNumber" : " TPS22916", + "allResponseList" : [ { + "contentId" : "3326217", + "userName" : "Andy Robles", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 8:27 PM", + "userId" : "6043129", + "content" : "Hi Renan, Welcome to E2E! The .tsc file is for a TINA-TI schematic with the model. For this device a TINA-TI schematic with a model was not created. What is available in the product folder is the PSPICE models for use in the PSPICE software tool. Best regards, Andy Robles" + }, { + "contentId" : "3326731", + "userName" : "Renan Santos Adriano", + "rankPoints" : "2795", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 6:55 AM", + "userId" : "5915270", + "content" : "Hi Andy, Thank you for this response. I apologize for the subject of this e2e thread, it is my mistake of adding the word PSPICE. It seems that my customer will stick to what is available on the website. He really wanted to have the .tsc file for TINA if possible. Regards, Renan" + }, { + "contentId" : "3327266", + "userName" : "Andy Robles", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 4:05 PM", + "userId" : "6043129", + "content" : "Hi Renan, I understand. Unfortunately we did not create the TINA model, but the PSPICE documents should help with all modeling needs. Best regards, Andy Robles" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS22916" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899695.json b/data/json/DLP/899695.json new file mode 100644 index 0000000000000000000000000000000000000000..d12651bf4ede9c745ac08661b092bdeb0284b421 --- /dev/null +++ b/data/json/DLP/899695.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899695", + "reporterName" : "Terry Weng1", + "rankPoints" : "20", + "resolutionStatus" : "", + "ticketName" : "TPS62740: Excess current", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 17", + "queryText" : "Part Number: TPS62740 The part could still work but it could have excess 2 mA or up sleep current for known reason. Reflow or Replace with a new part will solve the excess current issue. Any known failure mechanism?", + "partNumber" : " TPS62740", + "allResponseList" : [ { + "contentId" : "3326896", + "userName" : "Febin", + "rankPoints" : "1450", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 10:15 AM", + "userId" : "5781698", + "content" : "Hi Terry, I could not understand your problem clearly. Could you please rephrase your question? Regards, Febin" + }, { + "contentId" : "3327461", + "userName" : "Terry Weng1", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 6:55 PM", + "userId" : "6331206", + "content" : "We found that there is extra current (varying from +2mA to +10s' mA) at the regulator even at its sleep stage. The extra current can almost always be resolved by replacing or reflowing the regulator. The issue could relate to our layout. My guess is that there are short circuit (from the pads under the chip or) between some pins or some damage to the chip. However there still was proper output voltage from the \"problematic\" regulators though. That's why we need your insight to help us to improve our design so the issue can be avoided. Thank you." + }, { + "contentId" : "3329118", + "userName" : "Febin", + "rankPoints" : "1450", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 4:17 PM", + "userId" : "5781698", + "content" : "Hi Terry, I understand that you see excess input current drawn (varying from +2mA to +10s' mA). I would be curious to know about your measurement setup and exact probing points. Please specify all the conditions like Vin, Vout, Iin, Iout, etc. when you measured. It would be also better to measure SW node before and after the IC is replaced with the same conditions. Please share all the measurement results and we can analyse further. Regards, Febin" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS62740" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899699.json b/data/json/DLP/899699.json new file mode 100644 index 0000000000000000000000000000000000000000..32c3fff7f803c76a96e39e454887a4f96f5af12c --- /dev/null +++ b/data/json/DLP/899699.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899699", + "reporterName" : "Heba Badr", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM5122: Lm5122", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 23", + "queryText" : "Part Number: LM5122 I want use Lm5122 with boost converter. I have voltage input 3v and input current 50 ampere. My output voltage is 24v (battery) with output current 6.25. I want make several dc-dc converter by using LM5122. How I can connect them together. Is there any recommendations or tip for this specification", + "partNumber" : " LM5122", + "allResponseList" : [ { + "contentId" : "3326384", + "userName" : "Richard Fu22", + "rankPoints" : "2925", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 11:27 PM", + "userId" : "5003147", + "content" : "Hi Heda, LM5122 supports interleaved, and multiple-phase configuration. You can see this in LM5122 datasheet section 8.1.3, with figure 31, 32, and 33. Thanks, Richard" + }, { + "contentId" : "3327428", + "userName" : "Heba Badr", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 6:18 PM", + "userId" : "6282800", + "content" : "Thanks for your help. I will look for your tips." + } ], + "tags" : [ "/support/power-management/f/196/tags/LM5122" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899700.json b/data/json/DLP/899700.json new file mode 100644 index 0000000000000000000000000000000000000000..67aad5df3d939b2c6ee6e1efac69ebac0ba54ad5 --- /dev/null +++ b/data/json/DLP/899700.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899700", + "reporterName" : "Jim Brinkhurst1", + "rankPoints" : "39195", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LMZ14203H: Need worst case Gain/Phase margin analysis including temperature range and EOL aging", + "rankName" : "Mastermind", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: LMZ14203H Hi Power Team! My customer has an LMZ14203H circuit and needs to know the worst case stability over the following conditions: 1. Vout : 12V 2. Load: Nominal 0.2A, Max: 0.75A (if going in pulse skipping, what freq and ripple voltage) 3. Vin: 24V 4. Worst case phase margin (temp (-40deg to 85 deg, aging – BOL, EOL) 5. Worst case Gain margin (temp (-40deg to 85 deg, aging – BOL, EOL) 6. Input filter: Pi filter : 22uF – 10uH -22 uF (X7R caps) 7. Output filter: 3*10uF IIel 22uF (All ceramics) Can you help with this analysis? I don't know how to configure the WEBENCH Power Designer Tools to provide the needed stability analysis with these components. Best regards, Jim B", + "partNumber" : " LMZ14203H", + "allResponseList" : [ { + "contentId" : "3326197", + "userName" : "Jimmy Hua", + "rankPoints" : "17640", + "rankName" : "Genius", + "date" : "Apr 23, 2020 8:03 PM", + "userId" : "4798049", + "content" : "Hi Jim, This request sounds like quite a bit of bench test including thermal stream control. I don't think there is a way to simulate this. Webench does not account for thermal shifts. As note that thecompany Santa Clara site is still close for the upcoming pandemic future. Because of this, I have limited to almost no access to the lab. I would suggest providing the customer with an evaluation board to test their specific condition. I would also like to mention that the part is expected to be stable as long as the output capacitance and ESR range are met over temperature. The table in Figure 43 provides the typical recommended component selection, capacitor ESR, and input/output range for a stable operation. Regard, Jimmy" + } ], + "tags" : [ "/support/power-management/f/196/tags/LMZ14203H" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899702.json b/data/json/DLP/899702.json new file mode 100644 index 0000000000000000000000000000000000000000..24ccdae258c79ee34a828462bef5b42eefd43eb9 --- /dev/null +++ b/data/json/DLP/899702.json @@ -0,0 +1,71 @@ +{ + "ticketNumber" : "899702", + "reporterName" : "Sepeedah Zadeh", + "rankPoints" : "1850", + "resolutionStatus" : "", + "ticketName" : "TPS51604: Dead time variation", + "rankName" : "Intellectual", + "replies" : " 7", + "views" : " 32", + "queryText" : "Part Number: TPS51604 Hello team, How is the dead time for TPS51604 calculated? We are seeing variability in dead time across different units which makes it unpredictable for product performance (per datasheet shows 20-35ns range). Is there an alternate IC suggestion to have more predictable/less distributed dead time performance? Thanks!", + "partNumber" : " TPS51604", + "allResponseList" : [ { + "contentId" : "3326153", + "userName" : "Qian Chen", + "rankPoints" : "21370", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 7:05 PM", + "userId" : "1501908", + "content" : "Hi Sepeedah, TPS51604 use adaptive dead-time control to minimize low-side body diode conduction time. This information is available on datasheet page 12. Due to variation of gate drive strength and gate capacitance of MOSFET, the dead time may vary part to part because it use adaptive control, not fixed dead time. Btw, this part has been released for many years and no customer report these is dead-time issue. Thanks Qian" + }, { + "contentId" : "3326254", + "userName" : "Sepeedah Zadeh", + "rankPoints" : "1850", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 9:05 PM", + "userId" : "4798046", + "content" : "Thanks Qian. I understand the part supports adaptive dead-time, but we are needing something that lets the user set dead time, like UCC21520 using DT pin. But that part is overkill of course. Do we have anything similar to TPS51604 that lets the user set dead time?" + }, { + "contentId" : "3326266", + "userName" : "Qian Chen", + "rankPoints" : "21370", + "rankName" : "Mastermind", + "date" : "Apr 23, 2020 9:22 PM", + "userId" : "1501908", + "content" : "Hi Sepeedah, Why does customer have to set dead time? The adaptive dead time scheme prevents short through. My product line does not have other part that dead time can be set externally. Thanks Qian" + }, { + "contentId" : "3326329", + "userName" : "Sepeedah Zadeh", + "rankPoints" : "1850", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 10:23 PM", + "userId" : "4798046", + "content" : "Quin, They are driving two coils, the dead time (phase shift) between the two creates a common mode voltage which in turn creates EMI issues. If they can predict this commode mode voltage, then they can take care of the EMI issue. Given the variable nature right now, it is hard to do that. Hence, asking if there is a solution that lets the user set a predefined dead time." + }, { + "contentId" : "3328714", + "userName" : "Qian Chen", + "rankPoints" : "21370", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 12:50 PM", + "userId" : "1501908", + "content" : "Hi Sepeedah, Understood. The work around solution is to add below circuit between DRVH/DRVL and MOSFET gate to set the dead time." + }, { + "contentId" : "3329229", + "userName" : "Sepeedah Zadeh", + "rankPoints" : "1850", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 5:18 PM", + "userId" : "4798046", + "content" : "Thanks Quin! That's very helpful. Right now the connection between DRVH/DRVL and MOSFET has a reverse schottky diode in parallel with a resistor. Therefore, we need to add the cap and the forward diode to the resistor branch, correct? Is there a document that details the function of the circuit and how to appropriately size the components?" + }, { + "contentId" : "3329246", + "userName" : "Qian Chen", + "rankPoints" : "21370", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 5:28 PM", + "userId" : "1501908", + "content" : "Hi Sepeedah, The idea of the circuit is to add a delay during turn-on only, the turn-off is not affected. By this way the dead time between gate signals is created. Usually the capacitor value is fixed at a few hundred pF such as 100pF or 220pF. Vary resistor value until desired dead time is achieved. Thanks Qian" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS51604" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899715.json b/data/json/DLP/899715.json new file mode 100644 index 0000000000000000000000000000000000000000..c5000de8976a773406f08da17320561bc19b5b73 --- /dev/null +++ b/data/json/DLP/899715.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899715", + "reporterName" : "Jejomar Iidefonso", + "rankPoints" : "1695", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS3808: Minimum VIT pin Hysteresis", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 12", + "queryText" : "Part Number: TPS3808 Hi Team, Do we have data on the VIT pin minimum hysteresis? This is for the G01 variant. Our customer needs this for proper determination of voltage limits within their power supply design. As far as I know hysteresis generally do not vary that much from the nominal value. Do we have data for a more defined minimum value? Thanks in advance! Kind Regards, Jejomar", + "partNumber" : " TPS3808", + "allResponseList" : [ { + "contentId" : "3326707", + "userName" : "Abhinav.Sharma", + "rankPoints" : "6855", + "rankName" : "Expert", + "date" : "Apr 24, 2020 6:34 AM", + "userId" : "4691355", + "content" : "Hi Jejomar, We do not specify minimum hysteresis for this device, and in general for a lot of our devices. In this case, as you can see by the variation of the maximum band, minimum hysteresis is \"theoretically\" zero. You're right in assuming that hysteresis does not usually vary much itself, it is rather a factor of the variation of the voltage level. Due to this, we also do not have characterization data on the subject. We do not guarantee any sort of minimum hysteresis for the TPS3808. We do spec it, however, on the similar TPS3890. Thanks, Abhinav." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS3808" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899717.json b/data/json/DLP/899717.json new file mode 100644 index 0000000000000000000000000000000000000000..8b0006ab917ae31c281078795364f29f8fb0c8a5 --- /dev/null +++ b/data/json/DLP/899717.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899717", + "reporterName" : "Steve Widener", + "rankPoints" : "5545", + "resolutionStatus" : "", + "ticketName" : "TPS7A7300: Power Good default state", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 10", + "queryText" : "Part Number: TPS7A7300 I have a question regarding the differences between the two power supplies TPS7A7100 and 300. Besides the current rating, are there any differences? The behavior of the PG output seems to differ between the two. I have a previous design using the 100 that is using the PG output to pull down an enable rail for the next power supply in the sequence. The 100 pulls down the rail when it is unpowered which is the desired behavior. In the latest design, I changed out the 100 for the 300. Now the PG rail of the 300 seems to go high z when it is unpowered (different from the 100). Can you confirm the PG of the 300 goes high z when unpowered and that the PG of the 100 will crowbar to ground when unpowered? Also, is there a variant of the 300 available that will crowbar the PG to ground when unpowered?", + "partNumber" : " TPS7A7300", + "allResponseList" : [ { + "contentId" : "3326119", + "userName" : "Jason Song", + "rankPoints" : "12645", + "rankName" : "Genius", + "date" : "Apr 23, 2020 6:23 PM", + "userId" : "1505435", + "content" : "Hi Steve, I cannot say they don't have any other differences, but the PG functions between the two are the same. For your questions, when there is not enough Vin to power on the internal logic, the PG pin could be in either high Z or low impedance mode. In your application, which rail did you use to pull the PG to? Regards, Jason Song" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS7A7300" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899720.json b/data/json/DLP/899720.json new file mode 100644 index 0000000000000000000000000000000000000000..d728d891e018a22c6e82f8795fae0f18bad66d25 --- /dev/null +++ b/data/json/DLP/899720.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899720", + "reporterName" : "priyanka s", + "rankPoints" : "1030", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "CCS/IWR6843ISK-ODS: IWR 6843 ISK-ODS Device: Booting issues", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 20", + "queryText" : "Part Number: IWR6843ISK-ODS Tool/software: Code Composer Studio Hi, I am using the IWR 6843 ISK - ODS device for more than 2 months. There is booting issues with the Sensor, after flashing the .bin image. When i run the Demo Application(matlab GUI ),sensor start is not happening and it is not provided the frame Numbers. And one more issue is, antenna color has changed due to more heat. Attaching the sensor image below FYI. Here i will attach the power supply image also. Please guide me whether this power supply range is sufficient or more than that. Help me out to resolve the problem. -Regards, Priyanka.", + "partNumber" : " IWR6843ISK-ODS", + "allResponseList" : [ { + "contentId" : "3326829", + "userName" : "CHETHAN KUMAR Y.B.", + "rankPoints" : "11635", + "rankName" : "Genius", + "date" : "Apr 24, 2020 8:52 AM", + "userId" : "75569", + "content" : "Hello Priyanka, Board image you have posted is not of IWR6843ISK-ODS but regular IWR6843ISK, It need to be plugged with MMWAVEICBOOST board to work. Power adapter used seem to be fine. Is the problem is present on IWR6843ISK or IWR6843ISK-ODS board? Could you please post the image of the both the boards together under powered on condition when it does't work? Does out of box demo application run correctly? Thanks and regards, CHETHAN KUMAR Y.B." + } ], + "tags" : [ "/support/sensors/f/1023/tags/code%2bComposer%2bstudio", "/support/sensors/f/1023/tags/IWR6843ISK_2D00_ODS" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899721.json b/data/json/DLP/899721.json new file mode 100644 index 0000000000000000000000000000000000000000..bc695fd3bf867ff02bfff9d57f27deeb3174e1f8 --- /dev/null +++ b/data/json/DLP/899721.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899721", + "reporterName" : "Alper Fatih", + "rankPoints" : "810", + "resolutionStatus" : "Resolved", + "ticketName" : "AWR1642BOOST: +DCA 1000 EVM ::::: Use of USB and Ethernet extension cables", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 31", + "queryText" : "Part Number: AWR1642BOOST Hi, I am using a AWR1642BOOST + DCA1000 EVM. I am collecting raw 2x complex ADC data through these two EVMs and I am using mmwave Studio 2.0.0.2 also. There was some problem of getting LVDS data from DCA 1000 EVM on Ethernet cable on my old laptop. Therefore, I bought a 100/1000 Gigabit Ethernet adapter (with USB hub). Now I have a newer laptop but I prefer to use USB hub with Gigabit Ethernet adapter for less hassle in the experimental setup. I have plugged-in the following in the USB hub + Gigabit Ethernet adapter (2 in 1) - One TI-provided USB cable from AWR1642BOOST EVM - One USB cable from DCA1000 EVM (dont remeber if it came with a USB cable or not ? - One TI-provided ethernet cable from DCA1000 EVM There is one single USB cable (15cm) output going from the above USB + Ethernet hub, into my laptop and things are working fine. I wish to extend the length of this above USB cable from USB hub to my laptop. My questions are : 1) Considering that I am already using a USB hub (with built in gigabit ethernet adapter) with 15cm USB cable, how much maximum length of additional USB extension cable I can use without (severely) effecting signal integrity ? 2) What is the trade off on LVDS transfer rate of DCA1000EVM (maximum is 600Mbps) , when using the ethernet cable in a USB hub instead of directly using it in the ehternet (Rj-45) adapter of laptop ? 3) Is there a speed and / or signal integrity trade off if the two USB cables (one from AWR1642BOOST and one from DCA1000) are used as: --- 2 USB cables used in single USB slot of laptop through a USB hub ---- 2 USB cables used in a USB hub with builtin additional gigabit ethernet adapter Thanks and regards", + "partNumber" : " AWR1642BOOST", + "allResponseList" : [ { + "contentId" : "3326414", + "userName" : "Kyle Cousino", + "rankPoints" : "19220", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 12:18 AM", + "userId" : "4381542", + "content" : "Alper, I would need to see a picture of your physical setup. A setup using a USB hub that includes a Gigabit Ethernet adapter has not be verified by TI, so there is no guarantee that this setup would even work. The setup for the DCA1000EVM is specified in the User's Guide and the DCA1000EVM Quick Start Guide. Quick Start Guide: /lit/pdf/spruik7 User Guide: /lit/pdf/spruij4 Regards, Kyle" + }, { + "contentId" : "3326849", + "userName" : "Alper Fatih", + "rankPoints" : "810", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 9:22 AM", + "userId" : "5854646", + "content" : "Hi Kyle, I am attaching the picture of the setup. Please have a look at it and then please read my questions again. I hope you will understand my query better. This setup is working fine as far as I think and as far as I am experiencing. Then, please advise about question 1, 2 and 3 of my above post. Thanks and regards." + }, { + "contentId" : "3327133", + "userName" : "Kyle Cousino", + "rankPoints" : "19220", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 2:37 PM", + "userId" : "4381542", + "content" : "Alper, The underlying issue is that you are attempting to use a setup thatcompany has not verified so we cannot comment at this time on the various trade offs you are asking about. The recommend setup for using the DCA1000EVM is as follows: - 2 USB cables (each plugged into a different USB port on the PC) - 1 Ethernet cable (plugged into the RJ-45 connector on the PC) I have used 15 foot USB cables in the past without issue. I have also used a similar length Ethernet cable without issue. Regards, Kyle" + } ], + "tags" : [ "/support/sensors/f/1023/tags/DCA1000EVM", "/support/sensors/f/1023/tags/AWR1642BOOST" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899743.json b/data/json/DLP/899743.json new file mode 100644 index 0000000000000000000000000000000000000000..a85dd6a6c954b9237fbda30111517740c380de40 --- /dev/null +++ b/data/json/DLP/899743.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899743", + "reporterName" : "ShawnSan", + "rankPoints" : "10", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "AWR1642: Raw data transfer without DCA1000", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 21", + "queryText" : "Part Number: AWR1642 I am seeking to capture raw data and transfer it to MATLAB for post processing & analysis. Is this possible without using additional hardware such as the DCA 1000 or TWR ?", + "partNumber" : " AWR1642", + "allResponseList" : [ { + "contentId" : "3327057", + "userName" : "Jitendra Gupta", + "rankPoints" : "33995", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 1:40 PM", + "userId" : "1717369", + "content" : "Hello Shawn, Currently there are no other ways to capture the raw ADC data from AWR1642 than using DCA1000/TSW1400. Regards, Jitendra" + } ], + "tags" : [ "/support/sensors/f/1023/tags/AWR1642", "/support/sensors/f/1023/tags/DCA1000EVM", "/support/sensors/f/1023/tags/awr20_5F00_a_5F00_hwa20_5F00_dca1000" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899752.json b/data/json/DLP/899752.json new file mode 100644 index 0000000000000000000000000000000000000000..f0fb10e91e1978bc74010edd01a25d35bac5cf47 --- /dev/null +++ b/data/json/DLP/899752.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "899752", + "reporterName" : "Zhaohong Zhang1", + "rankPoints" : "110", + "resolutionStatus" : "", + "ticketName" : "BQ25703A: bq25703A intermittently stopped charging in the middle", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 26", + "queryText" : "Part Number: BQ25703A We use bq256703A to route USB type C power to our system and charging a 3-cell battery. The setup works well in general. However, we observed that bq25703A could intermittently stop charging battery. The issue have been observed with multiple system and batteries. The fail scenario are very similar. The charging starts at 10V battery voltage. With a volt meter, we can see that the battery voltage increasing to about 10.6V. The voltage gradually dropped to about 10.2V and stayed there. Our system can read the bq25703A internal registers. The charge status register at 0x20/21 has value of 0xa000. the bq25703A registers also show that VBus is 19.2V. Vsys is 10.432V, and Vbat is 10.240V. Those values are the same in all our tests (different boards and battery) showing the failure. Given the value of the charging status, we are not able to tell which charging mode bq25703A is in. Also, the battery changing complete correctly for most of our charging/discharging test. Although the occurrence of the failure is intermittent, the signature of the failure is consistent. Did someone report similar issue in the past? Would additional information do you need? Thanks, Zhaohong", + "partNumber" : " BQ25703A", + "allResponseList" : [ { + "contentId" : "3327486", + "userName" : "Tiger Zhou", + "rankPoints" : "610", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 7:28 PM", + "userId" : "1451791", + "content" : "It looks like an application issue. Please follow our EVM on schematic and layout." + }, { + "contentId" : "3327574", + "userName" : "Zhaohong Zhang1", + "rankPoints" : "110", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 9:32 PM", + "userId" : "6013487", + "content" : "Tiger, Thanks for the reply. Unfortunately, our further testing indicated that it is either a bug or an undocumented behavior of bq25703A. The issue is related to POR, watchdog timer, and ADC. We revised the test so that the test 100% repeatable in the following process. A completely depleted battery is used to start the test. Connect the charger (POR) -> Disable watchdog timer -> Set up charging current and voltage -> Enable ADC for continuous operation -> (after 175sec)->charging stopped. At this stage we can resume charging by disconnect and reconnect the charger. The charging goes to completion correctly. If we do not enable ADC in the above process, the battery is always charged from completely depleted to full charged without issue. The above indicates that the wachdog time is re-enabled by enabling the ADC. We solved the problem by the following process. Connect the charger (POR) -> Disable watchdog timer -> Set up charging current and voltage -> Enable ADC for continuous operation -> Disable watchdog timer After the change, we have not observed any issue. Would you please confirm the above behavior from silicon design perspective? We need to make sure that our solution is a valid one since our testing is limited. Once more, this issue is only observed when starting charging from a completely depleted battery. A POR will occur when the charger is connected. Is there a document about configuration sequence or behaviors not described in the datasheet? Would you please also provide more details about the issue discussed in this post ()? In our application, the ADC is configured in the continuous mode. The charger can be connected and disconnected randomly. Thanks, Zhaohong" + }, { + "contentId" : "3329365", + "userName" : "Zhaohong Zhang1", + "rankPoints" : "110", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 7:05 PM", + "userId" : "6013487", + "content" : "Tiger, Any update about this issue? We did some more testing. Our tests indicated that bq25703A does not take the first I2C write correctly after bq25703A POR (power on with fully depleted battery). In our new test, the bq25703A watchdog is enabled by default. We write to the charge current register every 87.5 sec to update the watchdog using the following sequence. Sequence for initializing bq25703A: I2C_Master_WriteBy2(CHG_ADDR, 0x02, 0x0800); //Configure current I2C_Master_WriteBy2(CHG_ADDR, 0x0A, 0x1200); //Configure input voltage I2C_Master_WriteBy2(CHG_ADDR, 0x3A, 0xE0FF); //Continuous ADC conversion, all 8 channels enabled resetElapseTimer(&ChgWatchDogtimer); Update the bq25703A watchdog every 87.5sec. if (elapsed(&ChgWatchDogtimer) > (uint32_t)87500000 ) { I2C_Master_WriteBy2(CHG_ADDR, 0x02, 0x0800); //Configure current to reset bq25703A watchdog resetElapseTimer(&ChgWatchDogtimer); //reset the timer } With the above configuration sequence, charging starts about 87.5sec after the power is applied to bq25703A. The move on successfully. If we change the the configuration as follows. I2C_Master_WriteBy2(CHG_ADDR, 0x02, 0x0800); //Configure current I2C_Master_WriteBy2(CHG_ADDR, 0x0A, 0x1200); //Configure input voltage I2C_Master_WriteBy2(CHG_ADDR, 0x3A, 0xE0FF); //Continuous ADC conversion, all 8 channels enabled I2C_Master_WriteBy2(CHG_ADDR, 0x02, 0x0800); //Configure current resetElapseTimer(&ChgWatchDogtimer); The charging starts immediately after the power is applied to bq259703A. Would you please contact your design and validation teams to confirm this behavior: bq25703A does not take the first I2C write correctly after bq25703A POR (power on with fully depleted battery).? Thanks, Zhaohong" + }, { + "contentId" : "3329779", + "userName" : "Tiger Zhou", + "rankPoints" : "610", + "rankName" : "Prodigy", + "date" : "Apr 28, 2020 2:30 AM", + "userId" : "1451791", + "content" : "Hi, Zhaohong, Thanks for the detailed report. I tried to confirm the scenario \"Connect the charger (POR) -> Disable watchdog timer -> Set up charging current and voltage -> Enable ADC for continuous operation -> (after 175sec)->charging stopped.\" But my EVM watchdog timer remained disable for the rest of time. You also mentioned your first write after POR may be unsuccessful. This maybe the reason. Anyway, the watchdog timer needs reset before it expires." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25703A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899755.json b/data/json/DLP/899755.json new file mode 100644 index 0000000000000000000000000000000000000000..fd6a030b8873cbf8084a7277d37abbb4f92568fe --- /dev/null +++ b/data/json/DLP/899755.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899755", + "reporterName" : "Mark Guastaferro", + "rankPoints" : "8880", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TL1963A: Thermal design help", + "rankName" : "Expert", + "replies" : " 3", + "views" : " 18", + "queryText" : "Part Number: TL1963A Customer wants to convert Vin = 10.8V to 13.2V to Vout = 9V using multiple TL1963A. Output load = 1.2A. Tambient = 45degC. One approach is to cascade two TL1963A LDOs (in KTT package) in series to share the power dissipation. Both LDOs would share a thermal pad on the topside of the board just large enough to encase the two packages. The pad would have about 20 thermal vias down to layer 7 of an 8 layer board. Layer 7 is almost all ground plane (>2500 sqmm). An alternate approach would be to use three TL1963A devices in parallel to share the load. All three would handle the full In/Output drop, but would output to different circuits so no load ballast is required. Each LDO would handle about 400 mA load current. Topside thermal pad would be just large enough to hold all three LDOs. Which approach would we recommend? Customer would like to get away with just two LDOs for area reasons. Seems like using three LDOs would reduce junction temp of the LDOs, but may be largest solution considering size of device and needed input/output caps. Its not clear how to model the thermal plan of the PCB. Will the thermal vias be enough to keep the topside thermal pad at a reasonable temp?", + "partNumber" : " TL1963A", + "allResponseList" : [ { + "contentId" : "3326403", + "userName" : "Kyle Van Renterghem", + "rankPoints" : "4860", + "rankName" : "Expert", + "date" : "Apr 23, 2020 11:54 PM", + "userId" : "1091764", + "content" : "Hey Mark, It's great to hear they are already planning for multiple thermal vias, this is often missed by customers and has a significant effect. If the max ambient temperature is 45C, then they can probably get away with two LDO's in series. I'd recommend setting the first Vout to 10.2 so the min Vin-Vout=600mV which would keep it out of dropout and will reduce the power dissipation of the first stage when Vin increases to 13.2V. So using worst case we'd have 2.4W of dissipation (1.2A*[13.2V-10.2V]) and the Rja is 32.9C/W for the JEDEC high-k board. So using Tj=Ta+Pd*Rja this would result in a max junction temperature of 124C keeping it just below the max operating temp. However, the description of their board sounds like it'll probably be better than the JEDEC high-k board and we have data showing that with a good thermal layout the Rja can be reduced by ~30% (see this app note if you're interested). While it would be better if the thermal vias were electrically connected to more metal, if the internal layers have a large amount of metal in and around the vias that metal will still help offload heat. Assuming the 30% improvement would result in a max junction temp of 99C. So their max junction temp should be between 99C-124C, keeping them within the specification. The last thing to consider is how often the LDOs are going to be running at these extended temperatures (this would be a combination of how often the 1.2A at Vin=13.2V is being applied and how often the ambient temp is at the max of 45C). Catalog IC's are qualified using the JEDEC standards JESD22-A108 and JESD85 which ensures IC's can operate at Tj=55C for approximately 9 years but the lifetime decreases as the temperature increases (which is often overlooked). Just to give you a sense of the effect junction temp has on IC lifetime below is a graph showing the minimum lifetime vs junction temp based on the JEDEC standards. Let me know if you have any other questions." + }, { + "contentId" : "3326603", + "userName" : "Mark Guastaferro", + "rankPoints" : "8880", + "rankName" : "Expert", + "date" : "Apr 24, 2020 4:15 AM", + "userId" : "3851", + "content" : "Hi Kyle, Thanks for the thorough analysis and comments. This is really helpful. However, there may be an error in the calculations. Under the worst case of Vin = 13.2V, the power dissipation in the first LDO would be 1.2A(13.2-10.2) = 3.6W instead of 2.4W. Under the RjA assumption of 32.9 degC/W, this results in a much higher junction temp (163C). Even with a 30% improvement in Rja, the junction temp might exceed 125C. Did I overlook something when I was going through this?" + }, { + "contentId" : "3327295", + "userName" : "Kyle Van Renterghem", + "rankPoints" : "4860", + "rankName" : "Expert", + "date" : "Apr 24, 2020 4:25 PM", + "userId" : "1091764", + "content" : "Hey Mark, Sorry about that, some how I made a silly error and miscalculated the power dissipation, you are right it should be 3.6W which takes it ~1 degree beyond the rated junction temperature (126C) even with the best PCB layout case. So if they really optimize the board for thermals they'll be right at or above the max junction temperature which wouldn't really result in much of a difference from a performance point of view however it makes the comments I made previously on minimum lifetime even more relevant. So they'll need to do the analysis themselves to determine how they'd like to proceed however I'd suggest going with the three parallel LDOs. This topology would burn 1.2W of power dissipation per LDO and if we assume the PCB is only as good as the JEDEC board then we'd expect a max junction temp of ~83C so there is a significant amount of margin with this design." + } ], + "tags" : [ "/support/power-management/f/196/tags/TL1963A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899758.json b/data/json/DLP/899758.json new file mode 100644 index 0000000000000000000000000000000000000000..1c3551459f66fb27dbe6525d5639e0de80c79f6f --- /dev/null +++ b/data/json/DLP/899758.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899758", + "reporterName" : "Duncan MacGregor", + "rankPoints" : "350", + "resolutionStatus" : "Resolved", + "ticketName" : "LP38798: Minimum Iout Required?", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 22", + "queryText" : "Part Number: LP38798 Is there any minimum current output requirement for this device? I don't see this specifically addressed in the data sheet. Appreciate your help.", + "partNumber" : " LP38798", + "allResponseList" : [ { + "contentId" : "3326380", + "userName" : "Jason Song", + "rankPoints" : "12645", + "rankName" : "Genius", + "date" : "Apr 23, 2020 11:19 PM", + "userId" : "1505435", + "content" : "Hi Duncan, I have reviewed the datasheet. The datasheet does not specify a minimum load current for the part to work, but the product specification table and characteristics curves were all taken at higher than 10mA. If your load current is higher than 10mA, you should be good; if not, to achieve the datasheet performance, you will need to burn additional power to have at least 10mA of load current. Regards, Jason Song" + }, { + "contentId" : "3326394", + "userName" : "Duncan MacGregor", + "rankPoints" : "350", + "rankName" : "Intellectual", + "date" : "Apr 23, 2020 11:40 PM", + "userId" : "395541", + "content" : "Jason, Thanks for the quick response. In normal use we will always be above the 10 mA (more like 100 mA or above) threshold so that should be OK. There are some circumstances where the external load would not be connected so we just want to make sure that's not an issue. Without the load connected we're really not too concerned about the output performance but want to make sure it's not an issue for the LP38978. Sounds like this should be OK. Thanks - Duncan PS - I like this answer better than the other one for the LP5907 input voltage headroom :)!" + }, { + "contentId" : "3327476", + "userName" : "Jason Song", + "rankPoints" : "12645", + "rankName" : "Genius", + "date" : "Apr 24, 2020 7:11 PM", + "userId" : "1505435", + "content" : "Lol, thank you. It should be fine as your stable load condition is higher than 10mA. Thanks for your feedback on the LP5907 one; if you have any concerns or additional questions, please do not hesitate to let me know." + } ], + "tags" : [ "/support/power-management/f/196/tags/LP38798" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899766.json b/data/json/DLP/899766.json new file mode 100644 index 0000000000000000000000000000000000000000..b5dc3fc299f67dbed3f87bac6fa89281637e3797 --- /dev/null +++ b/data/json/DLP/899766.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899766", + "reporterName" : "Duncan MacGregor", + "rankPoints" : "350", + "resolutionStatus" : "Resolved", + "ticketName" : "LP5907: Minimum Vin for 4.5V Vout?", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 18", + "queryText" : "Part Number: LP5907 We have an application where we are considering the LP5907 as a low-noise supply for a 4.5V rail with a 20-40 mA load. The input voltage is planned to be 5V which appears to meet the 250 mV max drop-out voltage spec. However in the data sheet there is an application note (section 9) \"To ensure that the LP5907 output voltage is well regulated and dynamic performance is optimum, the input supply must be at least VOUT + 1 V.\" If that is true then we would need at least a 5.5V supply input. The +1V statement appears to conflict with a specified maximum drop-out voltage of 250 mV. Can you clarify the input voltage requirement? Thanks - appreciate your help.", + "partNumber" : " LP5907", + "allResponseList" : [ { + "contentId" : "3326378", + "userName" : "Jason Song", + "rankPoints" : "12645", + "rankName" : "Genius", + "date" : "Apr 23, 2020 11:14 PM", + "userId" : "1505435", + "content" : "Hi Duncan, The headroom between Vin and Vout needs to be higher than the dropout for the LDO to regulate, but the higher margin is needed to achieve good PSRR and noise performance. That's why we recommend having higher than dropout headroom. Regards, Jason Song" + } ], + "tags" : [ "/support/power-management/f/196/tags/LP5907" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899768.json b/data/json/DLP/899768.json new file mode 100644 index 0000000000000000000000000000000000000000..a0420cfb57d9137529dd1a82a7d31b4a3cbfac85 --- /dev/null +++ b/data/json/DLP/899768.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899768", + "reporterName" : "Ved Soni1", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ25618EVM: Charge Current higher than specified", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 15", + "queryText" : "Part Number: BQ25618EVM Hello everyone! I am using a BQ25618EVM charger IC for Li-ion battery charging. While testing the IC using an electronic load instead of a battery and setting the input current via the EV2400 I2C interface, I found that when I set the charging current to 60 mA using BQStudio, the measured current supplied to the electronic load is 80 mA. This trend existed even when I increased the current until 160 mA. However, upon increasing the current beyond 200 mA, the measured and set current values matched again. Also, when I set the current to 40 mA, the measured current was recorded as 40 mA. I have multiple units of BQ25618EVM and I found this issue only with 2 out of 10 units. Also, I tried testing these ICs again using actual batteries and the same trend existed. Moreover, I checked the startup register settings of this IC, and it matched the default settings mentioned in the BQ25618 IC datasheet. So why is the measured current different than the set current in some of the ICs? Please let me know how I can troubleshoot this issue.", + "partNumber" : " BQ25618EVM", + "allResponseList" : [ { + "contentId" : "3327378", + "userName" : "Hong Mao", + "rankPoints" : "4010", + "rankName" : "Expert", + "date" : "Apr 24, 2020 5:36 PM", + "userId" : "4779728", + "content" : "Hi Ved: I think this could be setup issue. Did you use electronic load alone to simulate battery? When you do that, do you have additional power supply in parallel? Need to understand more about your setup. When you use real battery, how did you measure charge current? What is the battery voltage? Adding resistance between the charger and battery may reduce charge current. Regards, Hong" + }, { + "contentId" : "3329378", + "userName" : "Ved Soni1", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 7:14 PM", + "userId" : "6330571", + "content" : "Yes, I only used a constant voltage electronic load to simulate the battery. The voltage was set to 3.7 V which is the operating voltage of the battery. The voltage range of the actual battery is 3 to 4.2 V. With the battery connected, I measured the charge current using a DMM and also using a current sensor. This same setup when tested with other units of BQ25618EVM in my possession do not show a higher measured charge current when I set the registers to 60 mA." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25618EVM", "/support/power-management/f/196/tags/charge%2bcurrent", "/support/power-management/f/196/tags/BQ25618", "/support/power-management/f/196/tags/Battery%2bCharging", "/support/power-management/f/196/tags/EV2400", "/support/power-management/f/196/tags/bqStudio", "/support/power-management/f/196/tags/Charger%2bIC" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899770.json b/data/json/DLP/899770.json new file mode 100644 index 0000000000000000000000000000000000000000..99f3d87c1084f2d304c37b2da5e239cfc1c12168 --- /dev/null +++ b/data/json/DLP/899770.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899770", + "reporterName" : "Lauren Mayfield", + "rankPoints" : "2220", + "resolutionStatus" : "", + "ticketName" : "UCC28070A: Need help selecting component values for different modes", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 17", + "queryText" : "Editing to remove confidential information", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3326890", + "userName" : "Peter Meaney", + "rankPoints" : "29475", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 10:07 AM", + "userId" : "1139254", + "content" : "Hi Lauren, The UCC28070 is not designed to run from DC. The UCC28070 updates its QVFF table during the zero crossings of the AC line, VINAC pin goes to 0V. When operated from DC the QVFF table does not get updated and the controller will not operate correctly. Some customers have been successful in using the UCC28070 from DC but it requires an external circuit to pull the VINAC pin to ground periodically to trigger the update of the QVFF table. The input voltage and output voltage sense chains will have to be dynamically switched between the two modes. I suggest you run the excel design calculator to see how close the boost inductor values. Thecompany power stage designer tool may also be useful in comparing the two modes of operation from a power stage perspective. Regards Peter" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC28070A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899771.json b/data/json/DLP/899771.json new file mode 100644 index 0000000000000000000000000000000000000000..e8e2239adeb40ea159c9fc43b2c59a486e762e2a --- /dev/null +++ b/data/json/DLP/899771.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899771", + "reporterName" : "Huss_Shar", + "rankPoints" : "20", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ79606EVM-897: CAD Files", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 19", + "queryText" : "Part Number: BQ79606EVM-897 Hi, Are Altium design files for this evaluation kit available? Regards,", + "partNumber" : " BQ79606EVM-897", + "allResponseList" : [ { + "contentId" : "3327369", + "userName" : "Taylor Vogt", + "rankPoints" : "6625", + "rankName" : "Expert", + "date" : "Apr 24, 2020 5:26 PM", + "userId" : "4375069", + "content" : "Hi Huss, I will check on why the EVM files are not in the folder, but in the meantime you can use the reference design guide files for our reference design: /tool/TIDA-01537. Regards, Taylor" + }, { + "contentId" : "3328191", + "userName" : "Huss_Shar", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 1:06 AM", + "userId" : "6322032", + "content" : "Thanks Taylor." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ79606EVM_2D00_897" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899772.json b/data/json/DLP/899772.json new file mode 100644 index 0000000000000000000000000000000000000000..2f014f326131a842e5c73e4579ce3db3504dcba8 --- /dev/null +++ b/data/json/DLP/899772.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899772", + "reporterName" : "Jonathan Geronga", + "rankPoints" : "3280", + "resolutionStatus" : "", + "ticketName" : "LM3410: LED Driver that can pulse a string of LEDs for an industrial vision processing application", + "rankName" : "Expert", + "replies" : " 3", + "views" : " 23", + "queryText" : "Part Number: LM3410 Hi Team, The product above is for attention use only. Since I can't locate a useful product for the customer on our website, I would like to get some help if we have something to offer with the customer request below: The customer is looking for LED driver IC that can pulse a string of LEDs for an industrial vision processing application. In order to get the intensity of lighting the customer is looking for, He needs an LED driver capable of pulsing LEDs at higher currents while the shutter is open Requirements: Around 20-25v at 160mA to drive the LEDs 10ish LEDs with v_f of 2-2.5V Running around 100 hertz pulses source voltage for driving the leds will be 5-18v Let me know if you need more information. Thanks! Jonathan", + "partNumber" : " LM3410", + "allResponseList" : [ { + "contentId" : "3326433", + "userName" : "Irwin Nederbragt", + "rankPoints" : "20765", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 12:48 AM", + "userId" : "1880111", + "content" : "Hello, As you stated, 'The product above is for attention use only.' Yes, the LM3410 input range will not work. This is a boost requirement. You can look at the TPS92691 or TPS92692. The input voltage really wants to be 6.5V or higher but will work to lower voltages (designed for cold crank on automotive). So if 5V is the end of battery life this may still be okay. As for 100 Hz pulses, is the duration and timing critical? What is the pulse waveform? Best Regards," + }, { + "contentId" : "3327669", + "userName" : "Jonathan Geronga", + "rankPoints" : "3280", + "rankName" : "Expert", + "date" : "Apr 24, 2020 11:24 PM", + "userId" : "5915268", + "content" : "Hi Irwin, Thank you for your support and answer in my inquiry above and also suggesting acompany product. Regarding your question: As for 100 Hz pulses, is the duration and timing critical? >> Customer answer is Yes. What is the pulse waveform? >> Square wave Let me know if the products you suggested above still fits the customer needs base on his answer. Regards, Jonathan" + }, { + "contentId" : "3327673", + "userName" : "Irwin Nederbragt", + "rankPoints" : "20765", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 11:35 PM", + "userId" : "1880111", + "content" : "Hello Jonathan, I would say yes however I don' t have enough information. If it is PWM dimming at 100 Hz it should be good to use. It depends on the detail of what they are trying to do. Best Regards," + } ], + "tags" : [ "/support/power-management/f/196/tags/LM3410" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899773.json b/data/json/DLP/899773.json new file mode 100644 index 0000000000000000000000000000000000000000..c3c71833e2121ab949e7937216e861e4f0c822e8 --- /dev/null +++ b/data/json/DLP/899773.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899773", + "reporterName" : "Jonathan Geronga", + "rankPoints" : "3280", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ24072T: Confirm if BQ2407xT family IC can be used for harvesting purposes", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: BQ24072T Hi Team, Our customer would like to confirm if our BQ2407xT family IC can be used for harvesting purposes. The intention of harvesting in the customer application is to supply a device with a battery and use solar panels to charger it. The customer is aware that this device has no feature for harvesting but would to confirm if he connects a solar panel in the BQ2407xT input, the battery will be charged with any problem? If the device above and the customer design plan is not possible above, do we have an IC that can suits the customer requirement below: 28V input voltage, power path and battery charger features with 5V/3A output The nearest possible I saw so far is BQ24650. But base on the customer, if he will be using BQ24650, the questions is, do they have to add some circuitry to supply their load with battery while it chargers? Let me know if you need clarification in the above inquiry. Thanks! Jonathan", + "partNumber" : " BQ24072T", + "allResponseList" : [ { + "contentId" : "3327521", + "userName" : "Raheem", + "rankPoints" : "16655", + "rankName" : "Genius", + "date" : "Apr 24, 2020 8:24 PM", + "userId" : "4697250", + "content" : "Hello, The BQ24072T can be used with an energy harvesting device as long as the energy harvester can supply 5V to the input." + } ], + "tags" : [ "/support/power-management/f/196/tags/bq24072T", "/support/power-management/f/196/tags/bq24650" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899774.json b/data/json/DLP/899774.json new file mode 100644 index 0000000000000000000000000000000000000000..94a204f21e6d12b7c969e916642257c2e1cce521 --- /dev/null +++ b/data/json/DLP/899774.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "899774", + "reporterName" : "Hirokazu Takahashi", + "rankPoints" : "7090", + "resolutionStatus" : "", + "ticketName" : "LM61495-Q1: 15V/10A", + "rankName" : "Expert", + "replies" : " 4", + "views" : " 21", + "queryText" : "Part Number: LM61495-Q1 Hello support team We are studying below power lines. Vin : 22~30V Vout : 19V/4A, 12V/6A, 15V/10A We could find below products at as the possibility product for above requirements. 1) 19V/4A : LM61440-Q1 2) 12V/6A : LM61460-Q1 3) 15V/10A : LM61495-Q1 And then, my question is below. Q1. Do you think my selection products will be acceptable for each power lines? If you have other recommended products, please let me know. Q2. I guess that LM61495-Q1 will be able to cover all conditions. Is it better way to use different products for each power lines than LM61495-Q1 at all power lines at total efficiency point of view? Q3. How much heat radiation area is required when using LMH61495-Q1 at 15V / 10A? Q4. Do you have other options or recommended products for reducing the mount area on PCB? Best Regards, Hirokazu Takahashi", + "partNumber" : " LM61495-Q1", + "allResponseList" : [ { + "contentId" : "3326548", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 24, 2020 2:58 AM", + "userId" : "3498075", + "content" : "Hi Hirokazu, Can you provide more information for estimation: 1. Max ambient temp 2. PCB size and layers? 3. Prefer switching freq? 4. the load current is transient peak? or nominal value? B R Andy" + }, { + "contentId" : "3328561", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 27, 2020 9:51 AM", + "userId" : "3498075", + "content" : "Hi Hirokazu, I will close this thread if you have no more inquiry. B R Andy" + }, { + "contentId" : "3328627", + "userName" : "Hirokazu Takahashi", + "rankPoints" : "7090", + "rankName" : "Expert", + "date" : "Apr 27, 2020 11:20 AM", + "userId" : "465788", + "content" : "Hello Andy-san I'll put my answer for your question below. 1. Max ambient temp -> Ta=40C 2. PCB size and layers? -> It hasn't been fixed yet. We want to investigate PCB size to achive 3 kind of power lines. We plan to use 4 layers PCB. 3. Prefer switching freq? -> It hasn't been fixed yet. Could you suggest better solution at points of view with thermal, PCB size and FET switching loss? 4. the load current is transient peak? or nominal value? -> It is transient peak. Best Regards, Hirokazu Takahashi" + }, { + "contentId" : "3330025", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 28, 2020 7:24 AM", + "userId" : "3498075", + "content" : "Hi Hirokazu For LM61460, you can simulate the application in Webench with Fsw=400KHz to check the thermal performance. For LM61495, I will check it's possible load current for 15V out. B R Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM61495_2D00_Q1", "/support/power-management/f/196/tags/LM61440_2D00_Q1", "/support/power-management/f/196/tags/LM61460_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899777.json b/data/json/DLP/899777.json new file mode 100644 index 0000000000000000000000000000000000000000..bba013ec784523720e30af96af420cd950e30762 --- /dev/null +++ b/data/json/DLP/899777.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899777", + "reporterName" : "Takatoshi Tsuji", + "rankPoints" : "600", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "MMWAVEICBOOST: JTAG connection through XDS110 USB port", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 23", + "queryText" : "Part Number: MMWAVEICBOOST Hello , According to mmwave_sdk_68xx_hwa_user_guide.pdf, JTAG connection seems available through XDS110 USB port. I would like to connect JTAG through the USB port if it is possible to connect with just USB cable. Best regards, Taka", + "partNumber" : " MMWAVEICBOOST", + "allResponseList" : [ { + "contentId" : "3327526", + "userName" : "Charles Oladimeji", + "rankPoints" : "26350", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 8:29 PM", + "userId" : "4461477", + "content" : "Hi, Can you clarify your question? The JTAG connection is already through the USB cable. BR, Charles O" + }, { + "contentId" : "3327761", + "userName" : "Takatoshi Tsuji", + "rankPoints" : "600", + "rankName" : "Intellectual", + "date" : "Apr 25, 2020 4:16 AM", + "userId" : "6160823", + "content" : "Hello Charles, We have ordered TMDSEMU110-U but it would take some weeks for the delivery currently. I am wondering if it is possible to communicate JTAG through J11 USB port (w/o the JIG). If it is possible, we could start debugging before the JIG is arrived. Best regards, Taka" + }, { + "contentId" : "3329334", + "userName" : "Charles Oladimeji", + "rankPoints" : "26350", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 6:37 PM", + "userId" : "4461477", + "content" : "HI, You can debug using the MMWAVEICBOOST which i assume you already have. Please see link below for steps on debugging the OOB demo using the MMWAVEICBOOST BR, Charles O" + } ], + "tags" : [ "/support/sensors/f/1023/tags/MMWAVEICBOOST" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899778.json b/data/json/DLP/899778.json new file mode 100644 index 0000000000000000000000000000000000000000..a367f5e6bdcb8ca17d9e617d9fc2b00037248ab0 --- /dev/null +++ b/data/json/DLP/899778.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899778", + "reporterName" : "Ralph Germain", + "rankPoints" : "10", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC25600EVM: HAP410A DRAWING", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: UCC25600EVM Is there an available drawing for HPA410A ? It looks like the daughter card has a VDD ref... where does it come from ? Thanks, Ralph", + "partNumber" : " UCC25600EVM", + "allResponseList" : [ { + "contentId" : "3327383", + "userName" : "Eric Faraci", + "rankPoints" : "7685", + "rankName" : "Expert", + "date" : "Apr 24, 2020 5:45 PM", + "userId" : "3729643", + "content" : "Ralph Figure 26 (page 17) of the UCC25600EVM User Guide /lit/ug/sluu361a/sluu361a.pdf is the schematic and Figure 24 and Figure 25 (page 16) are the copper layers for HPA410 daughter card. You can refer to the pin designators on Figure 1 (page 4) schematic to determine how the various pins are connected. Please note that UCC25600EVM comes default populated with diode rectifier, so the logic VDD, GND and SYNC pins are not needed. If the HPA410 daughter cards are replaced with an SR controller like UCC24624 or UCC24612 then these logic pins would be used. Best Regards, Eric" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC25600EVM" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899779.json b/data/json/DLP/899779.json new file mode 100644 index 0000000000000000000000000000000000000000..a37065196a968721e08f28a093e8e8a5c3d65673 --- /dev/null +++ b/data/json/DLP/899779.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899779", + "reporterName" : "Jalen Tate89", + "rankPoints" : "2900", + "resolutionStatus" : "Resolved", + "ticketName" : "[FAQ] TMP61/TMP63/TMP64 - Can the TMP61, TMP63, TMP64 be soldered to an Aluminum PCB (IMS)?", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 30", + "queryText" : "Can the TMP61, TMP63, TMP64 be soldered to an Aluminum PCB (IMS)?", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3326450", + "userName" : "Jalen Tate89", + "rankPoints" : "2900", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 1:04 AM", + "userId" : "4697232", + "content" : "Aluminum PCB's (so called IMS, Insulated Metal Substrate) have different mechanical stretch properties when compared with FR4 PCB's. This leads to an effective method of heat dissipation across the circuit board. Circuit designers may find difficulty selecting SMD components that do not crack after reflow due to the different thermal expansion. However, the DYA (0603) package of the TMP6x family of devices can be used for the application. The DYA package can be soldered on IMS because the package leads have a tendency to allow for flexing. There still needs to be consideration to the layout. Care should be taken to have a balanced amount of copper on either sides to ensure one side does not cool much faster than another and to have proper thermal expansion." + } ], + "tags" : [ "/support/sensors/f/1023/tags/TMP61_2D00_Q1", "/support/sensors/f/1023/tags/TMP63", "/support/sensors/f/1023/tags/TMP64_2D00_Q1", "/support/sensors/f/1023/tags/TMP63_2D00_Q1", "/support/sensors/f/1023/tags/TMP64", "/support/sensors/f/1023/tags/TMP61" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899780.json b/data/json/DLP/899780.json new file mode 100644 index 0000000000000000000000000000000000000000..99a1e40d99151462613617f6045e7bf779c9112a --- /dev/null +++ b/data/json/DLP/899780.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899780", + "reporterName" : "Tonyx.wu", + "rankPoints" : "45", + "resolutionStatus" : "", + "ticketName" : "pls provide datasheets for part : TPS65994ACYBGR DID：9389285", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 15", + "queryText" : "Dears, pls provide datasheets for part : TPS65994ACYBGR DID：9389285 Because there is no datesheet, our material is blocked in the customs. Please provide it immediately. Thank you very much!", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3326714", + "userName" : "Prajith Cheerakkoda", + "rankPoints" : "2180", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 6:40 AM", + "userId" : "6129930", + "content" : "Hi Tony, I've sent you a request. Please accept it. Thanks Prajith" + } ], + "tags" : [ "/support/power-management/f/196/tags/pls%2bprovide%2bdatasheets%2bfor%2bpart%2b_3A00_%2bTPS65994ACYBGR%2b%2bDID_1AFF_9389285" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899789.json b/data/json/DLP/899789.json new file mode 100644 index 0000000000000000000000000000000000000000..b93dee884db933b641532c535496f00cb25b1792 --- /dev/null +++ b/data/json/DLP/899789.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899789", + "reporterName" : "Bill Toohey", + "rankPoints" : "20", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ35100: Does Lifetime Data Collection work in Accumulator mode?", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 14", + "queryText" : "Part Number: BQ35100 I'm trying to get Lifetime Data Collection to work while gauging in ACC mode, to get a simple view of voltage sag during a short current spike. I have not yet configured EOS mode. LF_EN is 1 in Operation Config A LT_EN command was sent (0x002E) LTEN bit is set in CONTROL_STATUS I turn the gauge on for ~4 seconds then turn it off, wait til G_DONE is set and read the LTFlash registers, and they do not move from their default values.", + "partNumber" : " BQ35100", + "allResponseList" : [ { + "contentId" : "3327583", + "userName" : "Eric Vos24", + "rankPoints" : "3585", + "rankName" : "Expert", + "date" : "Apr 24, 2020 9:41 PM", + "userId" : "3440231", + "content" : "Bill, Yes lifetime should work in ACC mode. When you say \"turn it off\" are you issuing the Gauge stop command. Lifetime is only committed to flash when the gauge stop command is issued, Thanks, Eric Vos" + }, { + "contentId" : "3328360", + "userName" : "Bill Toohey", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 6:30 AM", + "userId" : "5800839", + "content" : "Thanks for the fast reply. Several features don't work (or work differently) in ACC mode, so I'm glad I asked. Upon further investigation and increased logs, I discovered I'd left a debug flag on in our firmware which never issued GAUGE_STOP. Embarrassing, but great to have a resolution!" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ35100" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899790.json b/data/json/DLP/899790.json new file mode 100644 index 0000000000000000000000000000000000000000..89958910577efc05abaaa14254318d7eea4a63fa --- /dev/null +++ b/data/json/DLP/899790.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899790", + "reporterName" : "PYTsai", + "rankPoints" : "5780", + "resolutionStatus" : "Resolved", + "ticketName" : "LMR34215-Q1: How to measure the IQ-nonSW ?", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: LMR34215-Q1 Hi We are using LMR34215FSC5RNXRQ1, may i know how to measure the IQ-nonSW (the test set up) ?", + "partNumber" : " LMR34215-Q1", + "allResponseList" : [ { + "contentId" : "3326541", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 24, 2020 2:46 AM", + "userId" : "3498075", + "content" : "Hi PY, You need to use a DC power supply to bias Pin7 FB at any voltage between 1.2V--3.3V, then measure input current on VIN pin B R Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/LMR34215_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899799.json b/data/json/DLP/899799.json new file mode 100644 index 0000000000000000000000000000000000000000..b2624ec9fa19fd2e2bdd2ea6d0e34c4694b8f379 --- /dev/null +++ b/data/json/DLP/899799.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899799", + "reporterName" : "haojie tian", + "rankPoints" : "50", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS544C20: mask setting issue in power image", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 20", + "queryText" : "Part Number: TPS544C20 About mask setting in TPS544C20 power image: Dongle downloading: There is a setting to mask SMBALERT(MFR_23), I checked some boxes in the image and downloaded it to the controller by the dongle. But after power cycle, I read the configuration, there is no mask except EEPROM backup. We want to check if it’s the correct logic for TPS544C20, after power cycle MFR_23 refresh again. Thanks, Haojie", + "partNumber" : " TPS544C20", + "allResponseList" : [ { + "contentId" : "3327033", + "userName" : "Peter James Miller", + "rankPoints" : "19805", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 1:15 PM", + "userId" : "8518", + "content" : "haojie tian The only bit in MASK SMB ALERT that has NVM support is the Enable Auto ARA bit. All other MASK bits will revert to their default \"0b\" setting during Power On Reset. If you are looking for a device with NVM support for the SMB_ALERT mask functions, consider the TPS544C25, TPS546C23, or TPS546D24A" + }, { + "contentId" : "3327078", + "userName" : "haojie tian", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 1:56 PM", + "userId" : "6331603", + "content" : "Got it, thanks Peter !" + }, { + "contentId" : "3327091", + "userName" : "Peter James Miller", + "rankPoints" : "19805", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 2:05 PM", + "userId" : "8518", + "content" : "haojie tian You are most welcome. I am glad that I could help." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS544C20" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899800.json b/data/json/DLP/899800.json new file mode 100644 index 0000000000000000000000000000000000000000..97e6cfac6abd202670742a99fada173dc71a37f3 --- /dev/null +++ b/data/json/DLP/899800.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899800", + "reporterName" : "Dongbao Zhou", + "rankPoints" : "2360", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS92515AHV-Q1: difference with TPS92515HV-Q1", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: TPS92515AHV-Q1 Hi, I got a request from my customer to recommend a solution for automotive fog lamp driver, powered by 24V bat, 4*LED with 1.1A output current. I am considering to position TPS92515HV-Q1 or TPS92515AHV-Q1, could you let me the difference and what are the impacts for customer's design? Thanks. Dongbao", + "partNumber" : " TPS92515AHV-Q1", + "allResponseList" : [ { + "contentId" : "3327034", + "userName" : "Irwin Nederbragt", + "rankPoints" : "20765", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 1:16 PM", + "userId" : "1880111", + "content" : "Hello Dongbao, The TPS92515HV has a turn-on calibration which will make the current regulation set-point more accurate. The downside to this is during power on, on some devices near the 5 mV threshold it can be set to one current or another, basically a bit changing in the turn-on calibration. This will cause a 5 mV change in the current sense regulation point. At full current this is fairly insignificant. If deep analog dimming it can become noticeable during power cycles. The TPS92515AHV removes this calibration circuit so it will always power on at the same set-point. The set-point accuracy will we lower with this part since it is not calibrating during turn-on. The advantage for this is at low dimming, while not as accurate, it will not change during a power cycle. Look at the regulation accuracy between the two parts in the datasheet. It depends on what is preferred for their design. The good thing is the layout is the same for both so they can both be tested. Note that the bit changing during power on is a small percentage of parts where the IC operation is near a bit change during turn-on, most parts will not do this. Best Regards," + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS92515HV_2D00_Q1", "/support/power-management/f/196/tags/TPS92515AHV_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899801.json b/data/json/DLP/899801.json new file mode 100644 index 0000000000000000000000000000000000000000..edf08c62b65e242823a19c7a300be3f304d54a41 --- /dev/null +++ b/data/json/DLP/899801.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899801", + "reporterName" : "venkataseshathri sundaram", + "rankPoints" : "10", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "CSD19536KTT: Recommended operating condition Junction tempertature..", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 8", + "queryText" : "Part Number: CSD19536KTT Hi, CSD19536KTT - Data sheet does not specified \"the recommended operating Conditions Junction temperature value\". Please provide the value. Note:- In Datasheet maximum junction temperature specified in absolute maximum value only. Regards, Venkata Seshathri.S", + "partNumber" : " CSD19536KTT", + "allResponseList" : [ { + "contentId" : "3327041", + "userName" : "John Wallace1", + "rankPoints" : "9460", + "rankName" : "Genius", + "date" : "Apr 24, 2020 1:27 PM", + "userId" : "3502056", + "content" : "Hello Venkata, Thanks for the inquiry. You are correct. The maximum specified operating junction temperature for the CSD19536KTT is 175degC. Typically, you would not operate the device at this temperature continuously and would want to derate for reliability purposes. The exact amount of derating is based on the customer requirements. Typically, I have seen derating in the 15degC to 25degC range from TJmax specified in the datasheet. As a general rule of thumb, the FIT rate is reduced approximately by half for every 10degC reduction in temperature." + } ], + "tags" : [ "/support/power-management/f/196/tags/CSD19536KTT" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899804.json b/data/json/DLP/899804.json new file mode 100644 index 0000000000000000000000000000000000000000..a66f01d0f6b56f4d4b6f4994e320c1ef945d7365 --- /dev/null +++ b/data/json/DLP/899804.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899804", + "reporterName" : "user6256355", + "rankPoints" : "120", + "resolutionStatus" : "Resolved", + "ticketName" : "IWR6843ISK-ODS: Sensors forum", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 20", + "queryText" : "Part Number: IWR6843ISK-ODS i am following the people counting lab to do some experiments, but i meet some problems. i want to know whether the 68xx_3D_people_counting demo support IWR6843ODS, or it only support IWR6843ISK ?", + "partNumber" : " IWR6843ISK-ODS", + "allResponseList" : [ { + "contentId" : "3327193", + "userName" : "user6256355", + "rankPoints" : "120", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 3:27 PM", + "userId" : "6256355", + "content" : "。" + }, { + "contentId" : "3327261", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 4:02 PM", + "userId" : "5118664", + "content" : "Yes, it runs on ISK or ODS, as described in the user's guide. Regards, Justin" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR6843ISK", "/support/sensors/f/1023/tags/IWR6843ISK_2D00_ODS" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899806.json b/data/json/DLP/899806.json new file mode 100644 index 0000000000000000000000000000000000000000..d00bae54b3ca85a2050f470cec3f04aded37f38a --- /dev/null +++ b/data/json/DLP/899806.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899806", + "reporterName" : "Roy Chou1", + "rankPoints" : "1580", + "resolutionStatus" : "", + "ticketName" : "TPS2592BL: Latched response", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 10", + "queryText" : "Part Number: TPS2592BL Hi Team, I would like to know the IC response of below 4 condition 1. When voltage < Under voltage, does it has output voltage in output side? does it have delay for reponse? 2. When voltage > Over voltage clamp, does it has output voltage in output side? does it have delay for reponse? 3. When Io > Ilim, does it has output voltage in output side? does it have delay for reponse? 4. When Io > Ilim, how does current shut down? thermal shut down ? Regards, Roy", + "partNumber" : " TPS2592BL", + "allResponseList" : [ { + "contentId" : "3326663", + "userName" : "Praveen GD", + "rankPoints" : "9575", + "rankName" : "Genius", + "date" : "Apr 24, 2020 5:57 AM", + "userId" : "4421098", + "content" : "Hi Roy, Before I comment on your questions, I would like to let you know that this part is NOT recommended for new designs and is replaced by TPS25923 which is an EXACT EQUIVALENT in functionality and parametrics to TPS2592BL. You can also consider using our latest parts like TPS2595 which are more cost effective, smaller in size and have better performance. 1. When voltage < Under voltage, does it has output voltage in output side? does it have delay for reponse? When voltage applied on Enable pin is less than EN Threshold voltage, falling the internal FET in turned OFF. There is no flow of current from VIN to OUT. The output voltage depends on the output capacitance and the load value. There can be a small delay as mentioned in datasheet, tOFFdly = 0.4 us. 2. When voltage > Over voltage clamp, does it has output voltage in output side? does it have delay for reponse? When Input voltage > Over voltage threshold, (6.75 V) the device starts to regulate the gate of the internal FET such that the output voltage is clamped to 6.1V (typical voltage). The output voltage is maintained at 6.1V as long as the temperature of the FET internal does not reach the Thermal shut down threshold. You can expect a few micro seconds of delay here. 3. When Io > Ilim, does it has output voltage in output side? does it have delay for reponse? When the device is in current limit mode, the output voltage is decided by the output resistance (Vout = Ilim x Rload). You can expect a few micro seconds of delay in current limit response time. 4. When Io > Ilim, how does current shut down? thermal shut down ? Please refer to section 9.3.6 in the datasheet for more clear explanation." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS2592BL" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899809.json b/data/json/DLP/899809.json new file mode 100644 index 0000000000000000000000000000000000000000..d9c1f995e547758fdd3fb4344eb2fa4471f04e56 --- /dev/null +++ b/data/json/DLP/899809.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899809", + "reporterName" : "Lakshminarayana", + "rankPoints" : "3635", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS63802: Step file request", + "rankName" : "Genius", + "replies" : " 2", + "views" : " 13", + "queryText" : "Part Number: TPS63802 Is it possible to get a step file(3D Model) of TPS63802?", + "partNumber" : " TPS63802", + "allResponseList" : [ { + "contentId" : "3326715", + "userName" : "Milos", + "rankPoints" : "7260", + "rankName" : "Expert", + "date" : "Apr 24, 2020 6:41 AM", + "userId" : "5692358", + "content" : "Hi Lakshminarayana, Attached is the step file. Let us know if you need further help. DLA0010A.stp Best regards, Milos" + }, { + "contentId" : "3326778", + "userName" : "Lakshminarayana", + "rankPoints" : "3635", + "rankName" : "Genius", + "date" : "Apr 24, 2020 7:51 AM", + "userId" : "5809383", + "content" : "Thank you, Milos." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS63802" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899813.json b/data/json/DLP/899813.json new file mode 100644 index 0000000000000000000000000000000000000000..e33f2110dbc1d1ad3dbb33f60d1d06f8869bd4e0 --- /dev/null +++ b/data/json/DLP/899813.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899813", + "reporterName" : "Jamie Tseng", + "rankPoints" : "1290", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ30Z554-R1: BQ30Z55DBTR-R3", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: BQ30Z554-R1 Hi Team, May I know the change list of BQ30Z55DBTR-R3 between R1? Are there any ECN? My customer is applying R3 version in their project, but I cannot find BQ30Z55DBTR-R3 information on . Please kindly help. Thanks and best regards, Jamie", + "partNumber" : " BQ30Z554-R1", + "allResponseList" : [ { + "contentId" : "3327561", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 24, 2020 9:25 PM", + "userId" : "3528441", + "content" : "Hello Jamie, This is a custom part number, please go through business team." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ30Z554_2D00_R1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899816.json b/data/json/DLP/899816.json new file mode 100644 index 0000000000000000000000000000000000000000..8f6dd41f949278b7486ec6df59325d129a9b3efd --- /dev/null +++ b/data/json/DLP/899816.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899816", + "reporterName" : "user6126338", + "rankPoints" : "30", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "AWR1443BOOST: the size of adcData?", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 13", + "queryText" : "Part Number: AWR1443BOOST i follow the guide and i use matalb code to read adc_data.bin why the size of adcData become 4*262144 ? i know the ''4''meaning ,they have four Rx and i get chirp ADC_sample is 256 so 262144/256 =1024 ,this might be the number of chirp i think is my idea right? if yes,where to set the number of chirp in mmwave studio? and if i get the first 256 samples >>>> like this adcData (1:4,1:256) %% i know the chirp is emanated by Tx0 and Tx1 tx1 phase difference in Rx is like [0w 1w 2w 3w] tx2 phase difference in Rx is like [4w 5w 6w 7w] if i want the angle of target ,how to use Φ = 2π/λ ΔR = 2π/λ dsinθ i mean that if i take tx0 and tx1 Φ will be 1w-0w or 5w-4w or 5w -0w or 1w-4w ,and the answer will be different . How to fix it?", + "partNumber" : " AWR1443BOOST", + "allResponseList" : [ { + "contentId" : "3327111", + "userName" : "Kyle Cousino", + "rankPoints" : "19220", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 2:20 PM", + "userId" : "4381542", + "content" : "The ADC file size is determined by the following calculation: ADC_Data_Size_per_Frame = sizeof(real_part) * sizeof(imaginary_part) * num_adc_samples * num_chirps * num_TX * num_RX The assumption here is that you configure the ADC in Complex Mode. The real and imaginary values are each 2 bytes. When configured in complex mode, each sample will have a size of 4 bytes. When configured in real mode, each sample will have a size of 2 bytes. The key parameters that determine the file size are: ADC mode (complex or real mode) - this means either 4 bytes or 2 bytes per sample Number of ADC samples per chirp Number of chirps per frame Number of TX antennas Number of TX antennas Regards, Kyle" + } ], + "tags" : [ "/support/sensors/f/1023/tags/AWR1443BOOST" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899819.json b/data/json/DLP/899819.json new file mode 100644 index 0000000000000000000000000000000000000000..79d364c8230da96c50054814da607693c44ed2ce --- /dev/null +++ b/data/json/DLP/899819.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899819", + "reporterName" : "Michiaki Tanii", + "rankPoints" : "1600", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS562201: RDS_ON @ Ta = 120℃", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 17", + "queryText" : "Part Number: TPS562201 Hi Team, Could you kindly share the value of RDS_ON @ Ta =120℃ ? Thank you and best regards, Michiaki", + "partNumber" : " TPS562201", + "allResponseList" : [ { + "contentId" : "3326782", + "userName" : "Ryan Hu (BSR-MV)", + "rankPoints" : "2730", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 7:56 AM", + "userId" : "4779079", + "content" : "Hi Michiaki, Please refer to Figure 5 and 6 of the TPS562201 datasheet." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS562201" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899820.json b/data/json/DLP/899820.json new file mode 100644 index 0000000000000000000000000000000000000000..1c43275401e6e49f50d0ebde6a7dda429b57d5f7 --- /dev/null +++ b/data/json/DLP/899820.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899820", + "reporterName" : "Michael Javitt", + "rankPoints" : "10", + "resolutionStatus" : "", + "ticketName" : "HDC1080: Excessive current consumption and partial I2C", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 12", + "queryText" : "Part Number: HDC1080 We have had a number of parts where after assembling the current is significantly higher than the datasheet (up 50+mA). In some cases the I2C works partially, i.e. device ID/manufacture ID and configuration register are readable but measurements return either all zeros or full scale values. There is a delay of 25ms between measurement command and read result so that should not be the issue and as I said some I2C communication works correcly even for these defective devices so there does not to be an issue in the readout circuit. Properly functioning devices are read correctly. What kind of event could cause this type of failure? I will add that the I2C lines have ESD diodes (D5V0F2U3LP) and the device is powered by an on-board 3.3V regulator. Thanks", + "partNumber" : " HDC1080", + "allResponseList" : [ { + "contentId" : "3326953", + "userName" : "Josh Wyatt", + "rankPoints" : "61360", + "rankName" : "Guru", + "date" : "Apr 24, 2020 11:51 AM", + "userId" : "614", + "content" : "Dear Michael - Please post your schematic." + } ], + "tags" : [ "/support/sensors/f/1023/tags/HDC1080" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899825.json b/data/json/DLP/899825.json new file mode 100644 index 0000000000000000000000000000000000000000..3d9461a2a7f2010a15bbd182bcf6abcb2c781a1d --- /dev/null +++ b/data/json/DLP/899825.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899825", + "reporterName" : "balasubramani r", + "rankPoints" : "1140", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "IWR6843ISK: Longevity information", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 17", + "queryText" : "Part Number: IWR6843ISK Hi Team, Could you confirm the longevity of this IWR6843ISK antenna board? I have noticed OBSOLETE in digikey website and i couldnt see any info regarding longevity incompany website itself.", + "partNumber" : " IWR6843ISK", + "allResponseList" : [ { + "contentId" : "3327522", + "userName" : "Charles Oladimeji", + "rankPoints" : "26350", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 8:26 PM", + "userId" : "4461477", + "content" : "Hi, We are working on rectifying this. The EVM is not and should not be listed as OBSOLETE. BR, Charles O" + } ], + "tags" : [ "/support/sensors/f/1023/tags/_2300_%2b%2b%2bTexas%2bInstruments", "/support/sensors/f/1023/tags/IWR6843ISK" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899826.json b/data/json/DLP/899826.json new file mode 100644 index 0000000000000000000000000000000000000000..967c5b11c1679f7d9e6de08cee4951feeeff2019 --- /dev/null +++ b/data/json/DLP/899826.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899826", + "reporterName" : "Michiaki Tanii", + "rankPoints" : "1600", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LMR36520: Schematic review", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 11", + "queryText" : "Part Number: LMR36520 Hi team, I got the schematic from customer. Could you kindly review it ? If yes, please send me email and let me share the schematic internally. Thank you and best regards, Michiaki", + "partNumber" : " LMR36520", + "allResponseList" : [ { + "contentId" : "3326851", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 24, 2020 9:24 AM", + "userId" : "3498075", + "content" : "Hi Tanii, Pls send email to me at andy.chen@. I will close this thread and discuss it by email. B R Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/LMR36520" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899830.json b/data/json/DLP/899830.json new file mode 100644 index 0000000000000000000000000000000000000000..2c826a8c4a5d7d7c79a4fd0f6054ab7104e23c1d --- /dev/null +++ b/data/json/DLP/899830.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899830", + "reporterName" : "Jamie Tseng", + "rankPoints" : "1290", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ24610EVM: How to choose D1?", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 12", + "queryText" : "Part Number: BQ24610EVM Hi Team, Could you kindly recommend how to choose D1 with the max 1.05A charging current for 3s? Thanks and best regards, Jamie", + "partNumber" : " BQ24610EVM", + "allResponseList" : [ { + "contentId" : "3327424", + "userName" : "Kedar Manishankar", + "rankPoints" : "9290", + "rankName" : "Genius", + "date" : "Apr 24, 2020 6:16 PM", + "userId" : "4996925", + "content" : "Hi Jamie, Charge current and output voltage don't matter too much when selecting the bootstrap diode For D1 bootstrap diode, choose diode with the following: DC blocking voltage rated higher than supply voltage (VCC) with some margin. You want to account for the ringing in your system you would see when HSFET turns on, as when HSFET (Q3) turns on, the bootstrap diode will reverse bias to prevent reverse discharge into REGN. For the EVM, as BQ24610 is rated for 28V input (max recommended operating input voltage), a D1 diode with DC blocking voltage of 40V was used. Use sckottky diode Both the diode conduction losses and reverse recovery losses contribute to the total losses in the gate driver and must be considered in calculating the gate driver IC power dissipation. Choose diode with low forward voltage to reduce conduction losses (schottky has lower forward voltage drop) Scottky diodes offer fast recovery time. This means small amount of stored charge can be used for high speed switching applications. Peak current through the bootstrap diode is when LSFET is on, and REGN charges the bootstrap capacitor, and is given by Ipeak = Cboot * dV/dt Cboot = 0.1uF dV = 6V (REGN is charging the boostrap capacitor) dt = switching frequency You can choose a bootstrap diode with forward rating current roughly more than this ideal peak current calculation. D1 uses 480mA forward current rating which is fine." + } ], + "tags" : [ "/support/power-management/f/196/tags/bq24610evm" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899841.json b/data/json/DLP/899841.json new file mode 100644 index 0000000000000000000000000000000000000000..db18fbe8f182672ec0907827d38890af622a5bd2 --- /dev/null +++ b/data/json/DLP/899841.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899841", + "reporterName" : "Yumiko hayashi", + "rankPoints" : "150", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ24070: Inquiry about datasheet", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 16", + "queryText" : "Part Number: BQ24070 Hi Sir, BQ24070RHLR I have some questions in datasheet, please help me clarify it. What is meant of POR? What is the \"POR\" condition drawn in the starting point of the flow chart in page 16 ? Input voltage to IN pin? Input voltage to BAT pin? The other question is sleep mode in chapter \"8.4.1 Sleep Mode of page 14. Does Q2 ON in sleep mode work even if the POR * of the IC has never worked? In other words, if the IC has no IN input even once and there is a battery connection, will the IC output battery voltage to the OUT pin via Q2? Thank u. Regards,", + "partNumber" : " BQ24070", + "allResponseList" : [ { + "contentId" : "3327241", + "userName" : "Raheem", + "rankPoints" : "16655", + "rankName" : "Genius", + "date" : "Apr 24, 2020 3:54 PM", + "userId" : "4697250", + "content" : "Hello Yumiko-San, POR means power on reset. This just means the device get resets on power on. At POR, the input voltage will be regulated to 4.4V and battery is regulated to 4.2V. Yes the battery voltage will be on OUT when VIN is not present." + }, { + "contentId" : "3329895", + "userName" : "Yumiko hayashi", + "rankPoints" : "150", + "rankName" : "Prodigy", + "date" : "Apr 28, 2020 4:57 AM", + "userId" : "6150008", + "content" : "One more Question, When VIN of BQ24070 is not present and BQ24070 is sleep mode, do the TS pin output the current(100uA) or voltage? If the TS pin does not output any current, is it no probrem that the TS pin is applied voltage(3.3V)?" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24070" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899844.json b/data/json/DLP/899844.json new file mode 100644 index 0000000000000000000000000000000000000000..fc581666603ae9c644f3afc8f0f058cae71924c2 --- /dev/null +++ b/data/json/DLP/899844.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899844", + "reporterName" : "gr", + "rankPoints" : "50", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ25710EVM-017: No voltage reading from eval circuit.", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 18", + "queryText" : "Part Number: BQ25710EVM-017 Hi I am in the process of setting up an eval. environment to understand the function of the different registers in BQ25710. The end application will be a portable device with a 4S battery. After setting up the eval board everything seems to work fine, I can read and write the different registers, set charging current and so on, but when reading register 0x26, \"System and Battery Voltage Readback\", I only get 0000. This is the case whether if I try with only the battery connected, in which case I can measure battery voltage on both Vbat and Vsys connectors, or with only power supply connected, in which case there is only voltage on the Vsys connector, or both. Am I missing something here? Is there a register that has to be set to read the voltage, or is there something wrong with my eval board? Regards Gunnar", + "partNumber" : " BQ25710EVM-017", + "allResponseList" : [ { + "contentId" : "3327508", + "userName" : "Tiger Zhou", + "rankPoints" : "610", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 8:00 PM", + "userId" : "1451791", + "content" : "Hi, Gunnar, ADC is disabled in low power mode. Before enabling ADC, low power mode should be disabled first." + }, { + "contentId" : "3328344", + "userName" : "gr", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 6:18 AM", + "userId" : "3321325", + "content" : "Hi, thanks for your reply. I already tried setting bit 15, reg. 12h to 0, which should disable low power mode, but still no voltage reading. Any more bits to set? Regards Gunnar" + }, { + "contentId" : "3328528", + "userName" : "gr", + "rankPoints" : "50", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 9:15 AM", + "userId" : "3321325", + "content" : "OK I figured it out. You also have to set the ADC options in reg.35h Regards Gunnar" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25710", "/support/power-management/f/196/tags/BQ25710EVM_2D00_017" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899846.json b/data/json/DLP/899846.json new file mode 100644 index 0000000000000000000000000000000000000000..605725a87c1f2e1683ec83a51e3f339fd1534c3f --- /dev/null +++ b/data/json/DLP/899846.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899846", + "reporterName" : "Star Xu", + "rankPoints" : "2065", + "resolutionStatus" : "", + "ticketName" : "BQ21040: BQ21040 charge current drop", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 22", + "queryText" : "Part Number: BQ21040 Hi For the abnormal charging current describe as below: 1. VBUS = 5V, VBAT = 3.13V, charging current 615mA, the charging current in the constant current stage has not reached the design value 800mA. 2. VBUS = 5V, VBAT = 4V, the charging current starts to decrease, and the constant voltage stage is not entered at this time. 3. VBUS = 5.3V, VBAT = 4V, the charging current is restored to 800mA, what is the requirement for VBUS input voltage to maintain the maximum current charging? The voltage and current test data are as follows: VBUS(v) VBAT(v) Ibat(mA)-D2002在位 Ibat(mA)-去掉D2002 5 3.13 615 537 5 3.23 671 565 5 3.33 735 600 5 3.43 808 639 5 3.54 808 685 5 3.65 808 741 5 3.74 790 803 5 3.83 732 808 5 3.96 674 807 5 4.03 600 782 5 4.16 539 723 5 4.2 471 434 The Schematic as below: Thanks Star", + "partNumber" : " BQ21040", + "allResponseList" : [ { + "contentId" : "3327454", + "userName" : "Nick Brylski", + "rankPoints" : "340", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 6:44 PM", + "userId" : "5338371", + "content" : "Hi Star, At low VBAT, the voltage drop within charger is highest, so charging may not be reaching 800mA due to hitting thermal regulation. At higher VBAT, it could be limitation of the VIN to VBAT drop which could be causing drop in current. The charger needs enough headroom for best performance as the battery voltage goes high. Typical dropout voltage for charger is 325mV at 500mA charging. Dropout at 800mA will need to be even higher than this. What is BQ21040 VIN pin voltage during these tests? I suspect it is lower than 5V as there are diodes in input path. Best," + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ21040" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899849.json b/data/json/DLP/899849.json new file mode 100644 index 0000000000000000000000000000000000000000..ec49444efc6503eeaf5aecb4e19c334b4e917c67 --- /dev/null +++ b/data/json/DLP/899849.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899849", + "reporterName" : "Vicent Climent14", + "rankPoints" : "190", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LP87564-Q1: Remote sensing", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 30", + "queryText" : "Part Number: LP87564-Q1 Dearcompany members, We are currently using your LP87564 to supply a TDA2p processor. Due to some EMC problems we have found that we need to add ferrite beads at each one of the LP87564 outputs, just after the LC filter. But this solution is generating a new issue. The high current demanded by some of the TDA2p voltage rails is generating a voltage drop in those ferrite beads, which is getting more critical at high temperatures. We have tried to do a remote sensing of the DC signal by connecting FB pin after the ferrite bead. This seams to be functional at least in room conditions, but if we check the switching signal of the buck converter we can see that the PWM is not stable in the first seconds after power up and DC regulation is not very precise. It looks like the inductive part of the ferrite bead is affecting the feedback and it takes some time to adjust and lock the feedback loop. Do you know if it is possible to adjust the LP87564 to perform this remote sensing? Do you know if the AVS and other power management tools of the TDA2p would be able dynamically compensate this voltage drop? BR, Vicent Climent", + "partNumber" : " LP87564-Q1", + "allResponseList" : [ { + "contentId" : "3327758", + "userName" : "Kevin LaRosa", + "rankPoints" : "13725", + "rankName" : "Genius", + "date" : "Apr 25, 2020 4:12 AM", + "userId" : "3460140", + "content" : "Hi Vicent, The engineer will respond on Monday EU time." + }, { + "contentId" : "3328292", + "userName" : "Tomi Koskela", + "rankPoints" : "4310", + "rankName" : "Expert", + "date" : "Apr 27, 2020 5:16 AM", + "userId" : "1887680", + "content" : "Hello Vincent, The control loop for LP87564 is not designed for secondary L in the output and it will cause stability issues. So if the feedback is taken after the ferrite bead, the phase/gain margin will be poor and cause oscillation. Also the load transient response for the buck will be poor if ferrites are added to the output, so there's also affects to the dynamic performance, not only the DC drop. So I would suggest trying some other methods for solving the EMC problems. Usually the layout is the first one to check. There's general guidance for it in the datasheet application section. Are you using snubbers on the SW nodes? Fine tuning those values can help with the EMC as well. Do you have EMI filters on the input side? In the LP8756 EVM we have used ferrites in the input side if you would like to check. That usually requires quite a lot bulk capacitance after the ferrite to have the input voltage stable after the filter(s). Thanks. Regards. Tomi Koskela" + }, { + "contentId" : "3328442", + "userName" : "Vicent Climent14", + "rankPoints" : "190", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 7:40 AM", + "userId" : "4972158", + "content" : "Hi Tomi, Thank you very much for your answer. I general we have taken a big effort to make sure that the power supply layout is properly done. Could it be possible for your experts to take a look on our layout implementation of the LP87564? Regarding the snubber, we have it mounted but didn't do a fine tune on it. We can check on that. What might be a bit point here is the EMI filter you have in the input of the LP87564 EVM. Ours is right now much smaller as we are not placing that big capacitors (100uF) and the ferrite bead in the LP87564 input (I took for reference the following doc /lit/ug/snvu632/snvu632.pdf?ts=1587968020541). We will test this solution and get back to you with new results. Thx and BR, Vicent Climent." + } ], + "tags" : [ "/support/power-management/f/196/tags/LP87564_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899850.json b/data/json/DLP/899850.json new file mode 100644 index 0000000000000000000000000000000000000000..84f135191304ef05acdc3456b47f22f23b0a77ef --- /dev/null +++ b/data/json/DLP/899850.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899850", + "reporterName" : "Dinesh S1", + "rankPoints" : "160", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "IWR6843ISK: Soft reset DSS, BSS and MSS", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 18", + "queryText" : "Part Number: IWR6843ISK Hello Team, I would like to implement a software controlled reboot on my RADAR chip. I need to disable all three subsystem and restart the subsystems. I have tried using soft-reset API from SOC driver and integrated with CLI command. It restarts only the MSS. I wasn't able to find a feature to power-down BSS. So, I tried using the halt BSS API and then soft-reset the MSS. The board went into an unknown state and I had to power cycle it. In case of DSS I have found a power down sequence in your TRM, but no available API in your SDK. Is there any software document or code snippets that explain/assist in implementing this feature by ensuring all that BSS and DSS is completely shutdown before restarting the MSS ? It would be better if we can give the control over to the primary boot-loader and start everything again. Thanks, Dinesh", + "partNumber" : " IWR6843ISK", + "allResponseList" : [ { + "contentId" : "3327752", + "userName" : "Akash Gondalia", + "rankPoints" : "39385", + "rankName" : "Mastermind", + "date" : "Apr 25, 2020 3:50 AM", + "userId" : "4768107", + "content" : "Hi Dinesh, You have outlined the full extent of power-down functions, as outlined in the TRM. This all that we can provide at this time. Regards, AG" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR6843ISK" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899852.json b/data/json/DLP/899852.json new file mode 100644 index 0000000000000000000000000000000000000000..d71ccd6fa4e1617038f8426c538fd064ae1a47cb --- /dev/null +++ b/data/json/DLP/899852.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899852", + "reporterName" : "user5150089", + "rankPoints" : "75", + "resolutionStatus" : "", + "ticketName" : "MMWCAS-RF-EVM: User case1 :Test Source failed problem", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 38", + "queryText" : "Part Number: MMWCAS-RF-EVM Hi, I used mmwave_studio 2.1 , MMWCAS-RF-EVM (2243)and MMWCAS-DSP-EVM. when I execute the Test Souce script Cascade_Configuration_TestSourceDragonsoft.lua and Cascade_CaptureDragonsoft.lua ---- --[[ Sequence being followed A. CONFIGURATION 1. Connecting to TDA 1. Configuring Master from SOP till Channel Config 2. Configuring Slave (i) sequentially from SOP till SPI Connect. i = 1, 2, 3 3. Configuring Slaves together from F/W download till Channel Config 4. Configuring all devices together from LDO Bypass till Frame Config NOTE: Update the following in the script accordingly before running 1. metaImage F/W path on line 33 2. TDA Host Board IP Address on line 38 --]] ----------------------------------------User Constants---------------------------------------------------- dev_list = {1, 2, 4, 8} -- Device map RadarDevice = {1, 1, 1, 1} -- {dev1, dev2, dev3, dev4}, 1: Enable, 0: Disable cascade_mode_list = {1, 2, 2, 2} -- 0: Single chip, 1: Master, 2: Slave -- F/W Download Path -- Uncomment the next line if you wish to pop-up a dialog box to select the firmware image file -- Otherwise, hardcode the path to the firmware metaimage below -- By default, the firmware filename is: xwr12xx_metaImage.bin -- -- metaImagePath = RSTD.BrowseForFile(RSTD.GetSettingsPath(), \"bin\", \"Browse to .bin file\") -- metaImagePath = \"D:\\\\ti\\\\mmwave_dfp_01_02_05_01\\\\firmware\\\\xwr12xx_metaImage.bin\" metaImagePath = \"D:\\\\ti\\\\mmwave_dfp_02_01_05_03\\\\firmware\\\\xwr22xx_metaImage.bin\" -- IP Address for the TDA2 Host Board -- Change this accordingly for your setup TDA_IPAddress = \"192.168.33.180\" -- Device map of all the devices to be enabled by TDA -- 1 - master ; 2- slave1 ; 4 - slave2 ; 8 - slave3 deviceMapOverall = RadarDevice[1] + (RadarDevice[2]*2) + (RadarDevice[3]*4) + (RadarDevice[4]*8) deviceMapSlaves = (RadarDevice[2]*2) + (RadarDevice[3]*4) + (RadarDevice[4]*8) -- Enable/Disable Test Source -- This is useful during bringup test_source_enable = 1 -- 0: Disable, 1: Enable ------------------------------------------- Sensor Configuration ------------------------------------------------ -- The sensor configuration consists of 3 sections: -- 1) Profile Configuration (common to all 4 AWR devices) -- 2) Chirp Configuration (common to all 4 AWR devices) -- 3) Frame Configuration (common to all 4 AWR devices, except for the trigger mode for the master) -- Change the values below as needed. -- Profile configuration local profile_indx = 0 local start_freq = 77 -- GHz local slope = 79 -- MHz/us local idle_time = 5 -- us local adc_start_time = 6 -- us local adc_samples = 256 -- Number of samples per chirp local sample_freq = 8000 -- ksps local ramp_end_time = 40 -- us local rx_gain = 48 -- dB local tx0OutPowerBackoffCode = 0 local tx1OutPowerBackoffCode = 0 local tx2OutPowerBackoffCode = 0 local tx0PhaseShifter = 0 local tx1PhaseShifter = 0 local tx2PhaseShifter = 0 local txStartTimeUSec = 0 local hpfCornerFreq1 = 0 -- 0: 175KHz, 1: 235KHz, 2: 350KHz, 3: 700KHz local hpfCornerFreq2 = 0 -- 0: 350KHz, 1: 700KHz, 2: 1.4MHz, 3: 2.8MHz -- Frame configuration local start_chirp_tx = 0 local end_chirp_tx = 11 local nchirp_loops = 64 -- Number of chirps per frame local nframes_master = 10 -- Number of Frames for Master local nframes_slave = 10 -- Number of Frames for Slaves local Inter_Frame_Interval = 100 -- ms local trigger_delay = 0 -- us local nDummy_chirp = 0 local trig_list = {1,2,2,2} -- 1: Software trigger, 2: Hardware trigger ------------------------------------------- API Configuration ------------------------------------------------ -- 1. Connection to TDA. 2. Selecting Cascade/Single Chip. 3. Selecting 2-chip/4-chip WriteToLog(\"Setting up Studio for Cascade started..\\n\", \"blue\") if(0 == ar1.ConnectTDA(TDA_IPAddress, 5001, deviceMapOverall)) then WriteToLog(\"ConnectTDA Successful\\n\", \"green\") else WriteToLog(\"ConnectTDA Failed\\n\", \"red\") return -1 end if(0 == ar1.selectCascadeMode(1)) then WriteToLog(\"selectCascadeMode Successful\\n\", \"green\") else WriteToLog(\"selectCascadeMode Failed\\n\", \"red\") return -1 end WriteToLog(\"Setting up Studio for Cascade ended..\\n\", \"blue\") --Master Initialization -- SOP Mode Configuration if (0 == ar1.SOPControl_mult(1, 4)) then WriteToLog(\"Master : SOP Reset Successful\\n\", \"green\") else WriteToLog(\"Master : SOP Reset Failed\\n\", \"red\") return -1 end -- SPI Connect if (0 == ar1.PowerOn_mult(1, 0, 1000, 0, 0)) then WriteToLog(\"Master : SPI Connection Successful\\n\", \"green\") else WriteToLog(\"Master : SPI Connection Failed\\n\", \"red\") return -1 end -- Firmware Download. (SOP 4 - MetaImage) if (0 == ar1.DownloadBssFwOvSPI_mult(1, metaImagePath)) then WriteToLog(\"Master : FW Download Successful\\n\", \"green\") else WriteToLog(\"Master : FW Download Failed\\n\", \"red\") return -1 end -- RF Power Up if (0 == ar1.RfEnable_mult(1)) then WriteToLog(\"Master : RF Power Up Successful\\n\", \"green\") else WriteToLog(\"Master : RF Power Up Failed\\n\", \"red\") return -1 end -- Channel & ADC Configuration if (0 == ar1.ChanNAdcConfig_mult(1,1,1,1,1,1,1,1,2,1,0,1)) then WriteToLog(\"Master : Channel & ADC Configuration Successful\\n\", \"green\") else WriteToLog(\"Master : Channel & ADC Configuration Failed\\n\", \"red\") return -2 end -- Slaves Initialization for i=2,table.getn(RadarDevice) do local status = 0 if ((RadarDevice[1]==1) and (RadarDevice[i]==1)) then -- SOP Mode Configuration if (0 == ar1.SOPControl_mult(dev_list[i], 4)) then WriteToLog(\"Device \"..i..\" : SOP Reset Successful\\n\", \"green\") else WriteToLog(\"Device \"..i..\" : SOP Reset Failed\\n\", \"red\") return -1 end -- SPI Connect if (0 == ar1.AddDevice(dev_list[i])) then WriteToLog(\"Device \"..i..\" : SPI Connection Successful\\n\", \"green\") else WriteToLog(\"Device \"..i..\" : SPI Connection Failed\\n\", \"red\") return -1 end end end -- Firmware Download. (SOP 4 - MetaImage) if (0 == ar1.DownloadBssFwOvSPI_mult(deviceMapSlaves, metaImagePath)) then WriteToLog(\"Slaves : FW Download Successful\\n\", \"green\") else WriteToLog(\"Slaves : FW Download Failed\\n\", \"red\") return -1 end -- RF Power Up if (0 == ar1.RfEnable_mult(deviceMapSlaves)) then WriteToLog(\"Slaves : RF Power Up Successful\\n\", \"green\") else WriteToLog(\"Slaves : RF Power Up Failed\\n\", \"red\") return -1 end -- Channel & ADC Configuration if (0 == ar1.ChanNAdcConfig_mult(deviceMapSlaves,1,1,1,1,1,1,1,2,1,0,2)) then WriteToLog(\"Slaves : Channel & ADC Configuration Successful\\n\", \"green\") else WriteToLog(\"Slaves : Channel & ADC Configuration Failed\\n\", \"red\") return -2 end -- All devices together -- Including this depends on the type of board being used. -- LDO configuration if (0 == ar1.RfLdoBypassConfig_mult(deviceMapOverall, 3)) then WriteToLog(\"LDO Bypass Successful\\n\", \"green\") else WriteToLog(\"LDO Bypass failed\\n\", \"red\") return -2 end -- Low Power Mode Configuration if (0 == ar1.LPModConfig_mult(deviceMapOverall,0, 0)) then WriteToLog(\"Low Power Mode Configuration Successful\\n\", \"green\") else WriteToLog(\"Low Power Mode Configuration failed\\n\", \"red\") return -2 end -- Miscellaneous Control Configuration if (0 == ar1.SetMiscConfig_mult(deviceMapOverall, 1)) then WriteToLog(\"Misc Control Configuration Successful\\n\", \"green\") else WriteToLog(\"Misc Control Configuration failed\\n\", \"red\") return -2 end -- Edit this API to enable/disable the boot time calibration. Enabled by default. -- RF Init Calibration Configuration if (0 == ar1.RfInitCalibConfig_mult(deviceMapOverall, 1, 1, 1, 1, 1, 1, 1, 65537)) then WriteToLog(\"RF Init Calibration Successful\\n\", \"green\") else WriteToLog(\"RF Init Calibration failed\\n\", \"red\") return -2 end -- RF Init if (0 == ar1.RfInit_mult(deviceMapOverall)) then WriteToLog(\"RF Init Successful\\n\", \"green\") else WriteToLog(\"RF Init failed\\n\", \"red\") return -2 end ---------------------------Data Configuration---------------------------------- -- Data path Configuration if (0 == ar1.DataPathConfig_mult(deviceMapOverall, 0, 1, 0)) then WriteToLog(\"Data Path Configuration Successful\\n\", \"green\") else WriteToLog(\"Data Path Configuration failed\\n\", \"red\") return -3 end -- Clock Configuration if (0 == ar1.LvdsClkConfig_mult(deviceMapOverall, 1, 1)) then WriteToLog(\"Clock Configuration Successful\\n\", \"green\") else WriteToLog(\"Clock Configuration failed\\n\", \"red\") return -3 end -- CSI2 Configuration if (0 == ar1.CSI2LaneConfig_mult(deviceMapOverall, 1, 0, 2, 0, 4, 0, 5, 0, 3, 0)) then WriteToLog(\"CSI2 Configuration Successful\\n\", \"green\") else WriteToLog(\"CSI2 Configuration failed\\n\", \"red\") return -3 end ----------------------------Test Source Configuration------------------------------ -- This is useful for initial bringup. -- Each device is configured with a test object at a different location. if(test_source_enable == 1) then if(RadarDevice[1] == 1) then -- Object at 5 m with x = 4m and y = 3m if (0 == ar1.SetTestSource_mult(1, 4, 3, 0, 0, 0, 0, -327, 0, -327, 327, 327, 327, -2.5, 327, 327, 0, 0, 0, 0, -327, 0, -327, 327, 327, 327, -95, 0, 0, 0.5, 0, 1, 0, 1.5, 0, 0, 0, 0, 0, 0,0)) then WriteToLog(\"Device 1 : Test Source Configuration Successful\\n\", \"green\") else WriteToLog(\"Device 1 : Test Source Configuration failed\\n\", \"red\") return -3 end end -- if(RadarDevice[2] == 1) then -- Object at 5 m with x = 3m and y = 4m -- if (0 == ar1.SetTestSource_mult(2, 3, 4, 0, 0, 0, 0, -327, 0, -327, 327, 327, 327, -2.5, 327, 327, 0, 0, 0, 0, -327, 0, -327, 327, 327, 327, -95, 0, 0, 0.5, 0, 1, 0, 1.5, 0, 0, 0, 0, 0, 0,0)) then --WriteToLog(\"Device 2 : Test Source Configuration Successful\\n\", \"green\") -- else -- WriteToLog(\"Device 2 : Test Source Configuration failed\\n\", \"red\") -- return -3 -- end --end --if(RadarDevice[3] == 1) then -- Object at 13 m with x = 12m and y = 5m --if (0 == ar1.SetTestSource_mult(4, 12, 5, 0, 0, 0, 0, -327, 0, -327, 327, 327, 327, -2.5, 327, 327, 0, 0, 0, 0, -327, 0, -327, 327, 327, 327, -95, 0, 0, 0.5, 0, 1, 0, 1.5, 0, 0, 0, 0, 0, 0,0)) then --WriteToLog(\"Device 3 : Test Source Configuration Successful\\n\", \"green\") --else --WriteToLog(\"Device 3 : Test Source Configuration failed\\n\", \"red\") --return -3 --end --end --if(RadarDevice[4] == 1) then -- Object at 13 m with x = 5m and y = 12m --if (0 == ar1.SetTestSource_mult(8, 5, 12, 0, 0, 0, 0, -327, 0, -327, 327, 327, 327, -2.5, 327, 327, 0, 0, 0, 0, -327, 0, -327, 327, 327, 327, -95, 0, 0, 0.5, 0, 1, 0, 1.5, 0, 0, 0, 0, 0, 0,0)) then --WriteToLog(\"Device 4 : Test Source Configuration Successful\\n\", \"green\") --else --WriteToLog(\"Device 4 : Test Source Configuration failed\\n\", \"red\") --return -3 --end --end end ---------------------------Sensor Configuration------------------------- -- Profile Configuration if (0 == ar1.ProfileConfig_mult(deviceMapOverall, 0, start_freq, idle_time, adc_start_time, ramp_end_time, 0, 0, 0, 0, 0, 0, slope, 0, adc_samples, sample_freq, 0, 0, rx_gain)) then WriteToLog(\"Profile Configuration successful\\n\", \"green\") else WriteToLog(\"Profile Configuration failed\\n\", \"red\") return -4 end -- Chirp Configuration -- Chirp 0 if (0 == ar1.ChirpConfig_mult(deviceMapOverall, start_chirp_tx, end_chirp_tx, 0, 0, 0, 0, 0, 1, 1, 0)) then WriteToLog(\"Chirp 0 Configuration successful\\n\", \"green\") else WriteToLog(\"Chirp 0 Configuration failed\\n\", \"red\") return -4 end -- Enabling/ Disabling Test Source if(test_source_enable == 1) then ar1.EnableTestSource_mult(deviceMapOverall, 1) WriteToLog(\"Enabling Test Source Configuration successful\\n\", \"green\") end -- Frame Configuration -- Master if (0 == ar1.FrameConfig_mult(1,start_chirp_tx,end_chirp_tx,nframes_master, nchirp_loops, Inter_Frame_Interval, 0, 0, 1)) then WriteToLog(\"Master : Frame Configuration successful\\n\", \"green\") else WriteToLog(\"Master : Frame Configuration failed\\n\", \"red\") end -- Slaves if (0 == ar1.FrameConfig_mult(deviceMapSlaves,start_chirp_tx,end_chirp_tx,nframes_slave, nchirp_loops, Inter_Frame_Interval, 0, 0, 2)) then WriteToLog(\"Slaves : Frame Configuration successful\\n\", \"green\") else WriteToLog(\"Slaves : Frame Configuration failed\\n\", \"red\") end ---- after this do PostProc in mmwavestudio 2.1 ,the result was: there were so many target in the result , in my test script in lua , I just define one target. How can I solve these problem ?", + "partNumber" : " MMWCAS-RF-EVM", + "allResponseList" : [ { + "contentId" : "3327839", + "userName" : "Cesar", + "rankPoints" : "52960", + "rankName" : "Guru", + "date" : "Apr 25, 2020 11:25 AM", + "userId" : "20288", + "content" : "Hi We will be able to get back to you early next week Thank you Cesar" + } ], + "tags" : [ "/support/sensors/f/1023/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2bcascaded%2bimaging%2bradar", "/support/sensors/f/1023/tags/MMWCAS_2D00_DSP_2D00_EVM", "/support/sensors/f/1023/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2bTDA2xx", "/support/sensors/f/1023/tags/MMWCAS_2D00_RF_2D00_EVM" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899855.json b/data/json/DLP/899855.json new file mode 100644 index 0000000000000000000000000000000000000000..e51e3d5d8140f7d302c2f7fbf287d05e7574daeb --- /dev/null +++ b/data/json/DLP/899855.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899855", + "reporterName" : "Star Xu", + "rankPoints" : "2065", + "resolutionStatus" : "", + "ticketName" : "BQ25886: BQ25886 can not charge", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 15", + "queryText" : "Part Number: BQ25886 Hi Attached the schematic for your reference. Connect to the USB of the computer to charge, R19, R21, R22 are not soldered. After connecting the USB, the PG output is low (green light is on) for more than 1 second, and the red light is off (STAT output is high), REGN, SYS, BAT There is no output voltage. Soldering 5 boards, all the same problem, try to remove all other unnecessary devices on the periphery, it is still the same problem, the reason is not clear, I feel that the booster circuit does not start, or where the problem is detected during the startup process . Switch a regulated power supply for charging, short-circuit D + and D-, and ILIM to GND. Connect the battery first, and then connect the regulated power supply. There is no response and the indicator is off. Instead of connecting the regulated power supply first, the battery is not connected. The green light is always on and the red light flashes. Measure the voltage at the BAT terminal and jump around 5.4V. After connecting the battery, the red and green lights are off and there is still no charging. The battery voltage used in the test is 6.2V. Please help check the schematic. Thanks Star", + "partNumber" : " BQ25886", + "allResponseList" : [ { + "contentId" : "3327655", + "userName" : "Michael Emanuel35", + "rankPoints" : "2055", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 10:59 PM", + "userId" : "4996893", + "content" : "Dear Star, Can you please check the voltage of /CE when these problems are occurring? A high STAT pin, meaning no red light, indicates charge complete, sleep mode, or charge disabled. A valid VBUS eliminates sleep and charging isn't complete, so I think charging is not enabled. In addition, can you capture some waveforms of VBUS, SW, BAT, and IBAT? Thanks, Mike Emanuel Please click \"This resolved my issue\" button if this post answers your question." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25886" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899867.json b/data/json/DLP/899867.json new file mode 100644 index 0000000000000000000000000000000000000000..d4c3c765ed2262c7868f94678689bfd38a240013 --- /dev/null +++ b/data/json/DLP/899867.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899867", + "reporterName" : "vtolent", + "rankPoints" : "30", + "resolutionStatus" : "Resolved", + "ticketName" : "LM5023: Problem with startup circuit", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 33", + "queryText" : "Part Number: LM5023 Hello, I have an ACDC converter which uses the LM5023 as the flyback controller and UCC24612 as the secondary rectifier. Even though the flyback controller is supplied with the required voltage, neither its gate driver (out pin) nor its soft start pin seem to be working as expected – They are always low. Already at start-up, the circuit seems to be operating in an overload scenario, as the VSD pin intermittently controls the charging (12.5V) and discharging (7.5V) of the VCC cap as depicted in the attached image, which leads me to believe that the internal logic is actually working. The same behaviour repeats itself in two different samples, so I assume it is a systematic error and since the schematic is very much similar to the reference design one, I wonder what went wrong. Attached is the schematic and the measurement results. Any help is appreciated. ACDC_Schematic_V1.pdf", + "partNumber" : " LM5023", + "allResponseList" : [ { + "contentId" : "3327058", + "userName" : "Mike O'", + "rankPoints" : "27215", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 1:41 PM", + "userId" : "10947", + "content" : "Hello, LM5023 has OVP and OCP protection. If either of these get triggered the device will cycle VCC on and off. You just might not be seeing the gate drive pulses because you resolution is no high enough. The aux winding will trigger and OVP trips when VS is roughly 3V. If there is too much ringing on the Aux winging it can trigger an OVP. This can happen any time while the flyback is delivering energy. If this is the case putting a snubber across the output rectifier will help resolve this issue. There is an evaluation module for the UCC24612 that has a user guide that describes how to set up an RC snubber for this purpose in section 7. The users guide can be found at the following link. /lit/ug/sluubp3/sluubp3.pdf Regards," + }, { + "contentId" : "3327083", + "userName" : "vtolent", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 1:58 PM", + "userId" : "6091695", + "content" : "Hello, I found out the problem, which was actually related to the under voltage shutdown circuit, which was affecting the soft start. Now the board is at least starting up. Thanks, Victor" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC24612", "/support/power-management/f/196/tags/LM5023", "/support/power-management/f/196/tags/Startup" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899869.json b/data/json/DLP/899869.json new file mode 100644 index 0000000000000000000000000000000000000000..e5feb2ee4eb5d9b3a5a038c11470d515bf67b83a --- /dev/null +++ b/data/json/DLP/899869.json @@ -0,0 +1,15 @@ +{ + "ticketNumber" : "899869", + "reporterName" : "Bharath Krishna", + "rankPoints" : "60", + "resolutionStatus" : "", + "ticketName" : "TIDEP-01012: Two Sensor application", + "rankName" : "Prodigy", + "replies" : " 0", + "views" : " 28", + "queryText" : "Part Number: TIDEP-01012 Hi Team, We have gone through the design guide of TIDEP-01012,from our understanding the board can be configured to 2 chip Cascade mode instead of 4 radar sensors.Below are a few queries on this: 1)Which two radar sensors will be active ,as sensor#1 is called master? 2)Assuming only two of the four CSI-4 lanes being active,kindly let us know which CSI-4 lanes are to be considered(In two sensor mode)? 3)Will the TIDEP-01012 board work if only one connector(Either J4 or J5) is connected? Also please let us knowcompany EVM's using two or three cascaded radars max. Thanks in advance. Bharath", + "partNumber" : " TIDEP-01012", + "allResponseList" : [ ], + "tags" : [ "/support/sensors/f/1023/tags/TIDEP_2D00_01012" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899877.json b/data/json/DLP/899877.json new file mode 100644 index 0000000000000000000000000000000000000000..5e5f37e6af13636330eb4ac2285a8f75c044dd9b --- /dev/null +++ b/data/json/DLP/899877.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899877", + "reporterName" : "Koji Hayashi92", + "rankPoints" : "4905", + "resolutionStatus" : "", + "ticketName" : "BQ24105-Q1: When Input power supply (VCC, IN) is cut off during charging", + "rankName" : "Genius", + "replies" : " 1", + "views" : " 12", + "queryText" : "Part Number: BQ24105-Q1 Hi TI-team If the input power supply (VCC, IN) is cut off during charging, charging is stopped and the battery is discharged. Is this perception correct ? Best Regards, Koji Hayashi", + "partNumber" : " BQ24105-Q1", + "allResponseList" : [ { + "contentId" : "3327657", + "userName" : "Michael Emanuel35", + "rankPoints" : "2055", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 11:04 PM", + "userId" : "4996893", + "content" : "Dear Koji, On Page 15 of the datasheet under \"Sleep Mode,\" it states that if VCC is cut off, the part will enter sleep mode and prevent the battery from discharging. Thanks, Mike Emanuel Please click \"This resolved my issue\" button if this post answers your question." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24105_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899881.json b/data/json/DLP/899881.json new file mode 100644 index 0000000000000000000000000000000000000000..a606bdcf1f0c116276941d4d81b25f13cd344e82 --- /dev/null +++ b/data/json/DLP/899881.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899881", + "reporterName" : "Charles-Chen", + "rankPoints" : "5435", + "resolutionStatus" : "Resolved", + "ticketName" : "LM74700-Q1: How to understand the parameters provided in \"Functional Safety FIT Rate, Failure Mode Distribution LM74700-Q1\" document?", + "rankName" : "Expert", + "replies" : " 2", + "views" : " 13", + "queryText" : "Part Number: LM74700-Q1 Hi team, I want to know the meaning of parameters provided in the document \"Functional Safety FIT Rate, Failure Mode Distribution LM74700-Q1\". Can you email some corresponding materials or documents to me? For example, what's the meaning of table \"FIT Siemens Norm SN29500 (2)\"? How to calculate the MTBF according to the different Fit rate of all components? You can reply to me through emails. Thanks.", + "partNumber" : " LM74700-Q1", + "allResponseList" : [ { + "contentId" : "3327304", + "userName" : "Karikalan Selvaraj", + "rankPoints" : "13870", + "rankName" : "Genius", + "date" : "Apr 24, 2020 4:33 PM", + "userId" : "1601212", + "content" : "Hi Yes, I will get back by email on the functional safety FIT rate on LM74700-Q1. Regards, Kari." + }, { + "contentId" : "3328321", + "userName" : "Karikalan Selvaraj", + "rankPoints" : "13870", + "rankName" : "Genius", + "date" : "Apr 27, 2020 5:53 AM", + "userId" : "1601212", + "content" : "Hi Charles, Due to the type of content, I think we may have to take this thread discussion offline over email. I have sent an email to you. Regards, Kari." + } ], + "tags" : [ "/support/power-management/f/196/tags/LM74700_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899888.json b/data/json/DLP/899888.json new file mode 100644 index 0000000000000000000000000000000000000000..e1c09001264c1774a0f21892dfe23005d79d94c1 --- /dev/null +++ b/data/json/DLP/899888.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899888", + "reporterName" : "user5850147", + "rankPoints" : "250", + "resolutionStatus" : "Resolved", + "ticketName" : "CCS/IWR1642BOOST: AWR1642: Create a new array and assign the starting address", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 22", + "queryText" : "Part Number: IWR1642BOOST Tool/software: Code Composer Studio Hi， In the mmwave_sdk_user_guide.pdf (Version : 02_00_00_04), a method about how to add a .const (table) beyond L3 heap in mmW demo where overlay is enabled is introduced: But I met a new problem.When I created an array, its data address overlapped with the obj->radarcube. This situation will cause errors in subsequent calculations. Therefore, I need to assign an appropriate starting address to this new array, but I don't know how to do that . Function MMW_ALLOC_BUF can assign an address to an array, while the array has to be a member of structure MmwDemo_DSS_DataPathObj. Thanks!", + "partNumber" : " IWR1642BOOST", + "allResponseList" : [ { + "contentId" : "3327709", + "userName" : "Nitin Sakhuja", + "rankPoints" : "21705", + "rankName" : "Mastermind", + "date" : "Apr 25, 2020 12:52 AM", + "userId" : "1602842", + "content" : "Hello, As mentioned in the SDK 2.1 user guide (section 6.9) , overlays are used for overlaying one time execute (initialization) code with data memory. You cannot overlay an array that you want to use at runtime with Radar cube without reducing the size of Radar Cube first. You need to reduce the size of the Radar cube by the amount needed for your const buffer and then use the linker option (HIGH) as shown in the example to make sure that the const buffer is allocated at a high address so as not to overlap with the Radar Cube. Please make sure you are following the example correctly and also refer to the Linker command file resources mentioned in the following thread: Linker command file:company Linker Command File Primer Linker command file (advanced): Advanced Linker Techniques for Convenient and Efficient Memory Usage Regards -Nitin" + } ], + "tags" : [ "/support/sensors/f/1023/tags/AWR1642", "/support/sensors/f/1023/tags/IWR1642BOOST", "/support/sensors/f/1023/tags/code%2bComposer%2bstudio" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899889.json b/data/json/DLP/899889.json new file mode 100644 index 0000000000000000000000000000000000000000..ecd3ba60c60ce78d9cc110a245ec40b73724894a --- /dev/null +++ b/data/json/DLP/899889.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899889", + "reporterName" : "user4773172", + "rankPoints" : "1380", + "resolutionStatus" : "", + "ticketName" : "TPS25940: Inquire internal MOSFET Ids spec and SOA curve", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 14", + "queryText" : "Part Number: TPS25940 Hi Sir, May I know the TPS25940 internal back to back MOSFET Ids spec and SOA curve? Please feel free to contact me via mail. Thank you. Edward Chen", + "partNumber" : " TPS25940", + "allResponseList" : [ { + "contentId" : "3326798", + "userName" : "Praveen GD", + "rankPoints" : "9575", + "rankName" : "Genius", + "date" : "Apr 24, 2020 8:20 AM", + "userId" : "4421098", + "content" : "Hi Edward, Can you let us know why you need the internal FET parameters. The maximum current limit setting for this device is 5.2A which allows user to use this device for a maximum load current of 4.78 A. Regarding the FET SOA, the device is designed to operate always under its SOA and protect itself wit the help of Thermal Shut Down feature as long as the device is used under its recommended operating conditions." + }, { + "contentId" : "3326802", + "userName" : "user4773172", + "rankPoints" : "1380", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 8:24 AM", + "userId" : "4773172", + "content" : "Hi Praveen, Customer would like to test short circuit test and need to make sure the current spike will not over TPS25940 Ids spec, do you think we can provide that data to them? Thank you. Edward Chen" + }, { + "contentId" : "3326895", + "userName" : "Praveen GD", + "rankPoints" : "9575", + "rankName" : "Genius", + "date" : "Apr 24, 2020 10:13 AM", + "userId" : "4421098", + "content" : "Hi Edward, As long as the voltage applied to the efuse is within the Recommended Operating Condition, the efuse will limit its current to a safe value and make sure the internal FET is operated under its SOA with the help of thermal shutdown. So, customer need not worry about the FET SOA as we guarantee its protection under fault conditions." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS25940" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899892.json b/data/json/DLP/899892.json new file mode 100644 index 0000000000000000000000000000000000000000..b68234a8f7e8a7d45a08edc969dcd8f3a48f176f --- /dev/null +++ b/data/json/DLP/899892.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899892", + "reporterName" : "Wenhao Wu", + "rankPoints" : "1260", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS2359: A question about current limit timer", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 19", + "queryText" : "Part Number: TPS2359 Hi Team, My customer is using TPS2359 widely in their system. The llimit is 8A and fault timer is 5.4mS for period when Vgs lower than 6V. My customer's question is: if i exert a 10A 5ms and 0A 5ms square wave load on output, the TPS2359 would not protect MOS anymore. Because when 10A is making Vgs drops for 5ms, it drops to 0A before timer terminates. Then timer releases to 0ms. The upcoming 5ms 0A is not enough for mos to dissipate heat. Therefore, the mos will accumulate heat until it is damaged. See below for how the waveform looks like. Could you please tell me if there is a status bit in register that indicates TPS2359 has started current limit? From hardware point of view, do you know if it is possible to do some workaround to protect MOS from over-heat? Thank you! -Wenhao", + "partNumber" : " TPS2359", + "allResponseList" : [ { + "contentId" : "3326854", + "userName" : "Praveen GD", + "rankPoints" : "9575", + "rankName" : "Genius", + "date" : "Apr 24, 2020 9:26 AM", + "userId" : "4421098", + "content" : "Hi Wenhao, Shorter fault times reduce the stresses imposed on the pass FETs under fault conditions. So, it is recommended to select the shortest fault times sufficient to allow down-stream loads and bulk capacitors to charge. Unfortunately, fault is reported only after fault timer runs out, and channel turned off." + }, { + "contentId" : "3326857", + "userName" : "Wenhao Wu", + "rankPoints" : "1260", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 9:28 AM", + "userId" : "5617526", + "content" : "Hi Praveen, Shorter timer will fail start-up. They have tried. Based on situation, is there a hardware way for us to ease the heat stress in this corner case? -Wenhao" + }, { + "contentId" : "3326859", + "userName" : "Praveen GD", + "rankPoints" : "9575", + "rankName" : "Genius", + "date" : "Apr 24, 2020 9:32 AM", + "userId" : "4421098", + "content" : "Hi Wenhao, One option here is to replace the FET with another one which has better SOA. Most of the FET's are pin to pin." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS2359" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899893.json b/data/json/DLP/899893.json new file mode 100644 index 0000000000000000000000000000000000000000..9ed54ae8cd68a44db7f57c51b033d2910146d0b6 --- /dev/null +++ b/data/json/DLP/899893.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899893", + "reporterName" : "Koji Hayashi92", + "rankPoints" : "4905", + "resolutionStatus" : "", + "ticketName" : "BQ24105-Q1: About OPERATIONAL FLOW CHART \"FSTCHG Timer Expired ？\"", + "rankName" : "Genius", + "replies" : " 1", + "views" : " 13", + "queryText" : "Part Number: BQ24105-Q1 Hi TI-team About the timer of timer charging the following is the customer's recognition. It is not a timer that charges for a fixed time, but a timer for judging that charging is completed if charging is completed within the specified time and abnormal if charging is not completed. Is this correct? Best Regards, Koji Hayashi", + "partNumber" : " BQ24105-Q1", + "allResponseList" : [ { + "contentId" : "3327661", + "userName" : "Michael Emanuel35", + "rankPoints" : "2055", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 11:10 PM", + "userId" : "4996893", + "content" : "Dear Koji, On page 14 of the datasheet, under \"Charge Termination and Recharge\" it states that the part provides a programmable charge timer. The user can set this timer. If the timer expires before termination occurs, charging will stop. Charging will resume based upon \"Timer Fault Recovery\" on page 16. Thanks, Mike Emanuel Please click \"This resolved my issue\" button if this post answers your question." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24105_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899896.json b/data/json/DLP/899896.json new file mode 100644 index 0000000000000000000000000000000000000000..6f638d24ba8997d416eb622b0981c6d06a62a5aa --- /dev/null +++ b/data/json/DLP/899896.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899896", + "reporterName" : "Masazumi Ishii", + "rankPoints" : "3910", + "resolutionStatus" : "", + "ticketName" : "TPS7A39: TPS7A3901 about INN pin", + "rankName" : "Genius", + "replies" : " 2", + "views" : " 11", + "queryText" : "Part Number: TPS7A39 Hello. I have a question about TPS7A3901. For details, please check the attached materials. Thank you. TPS7A3901-3.pdf", + "partNumber" : " TPS7A39", + "allResponseList" : [ { + "contentId" : "3327194", + "userName" : "JCHK", + "rankPoints" : "27915", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 3:29 PM", + "userId" : "1108707", + "content" : "HI Ishii-san, Can you capture a scope trace of the INP and INN pin with respect to GND during this power-up procedure? Your detailed power-on procedure mentions that power is OFF before the CN4 connection, is there any chance it was ON before the connection? Also, you mention that you have 4 TPS7A39's in parallel. Are the failures at the same location or is it random? I have not seen the TPS7A39 fail before so I would like to get more information to help understand what might be happening." + }, { + "contentId" : "3329715", + "userName" : "Masazumi Ishii", + "rankPoints" : "3910", + "rankName" : "Genius", + "date" : "Apr 28, 2020 1:27 AM", + "userId" : "17437", + "content" : "Hello Thank you for your reply. The input waveform is attached. The cause is unknown, but there seems to be a problem with the input waveform. Thank you. TPS7A3901-4.pdf" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS7A39" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899901.json b/data/json/DLP/899901.json new file mode 100644 index 0000000000000000000000000000000000000000..367ccfccf7fc016604f741d7b3da419829872509 --- /dev/null +++ b/data/json/DLP/899901.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899901", + "reporterName" : "Kaji@PAN", + "rankPoints" : "3240", + "resolutionStatus" : "Resolved", + "ticketName" : "UCC28070: Current detection method", + "rankName" : "Genius", + "replies" : " 1", + "views" : " 15", + "queryText" : "Part Number: UCC28070 Hi, I am considering using UCC28070 device. Regarding the current detection method of UCC28070, I would like to detect the current by inserting a low resistance on the source side of the FET as shown below, instead of the current transformer method of the recommended circuit. Is such a method of current detection possible? If so, is there acompany current sense amplifier that is the best choice for sensing? I am going to use the VCC of UCC28070 (I plan to set it to 13V) for the amplifier power supply. Best regards,", + "partNumber" : " UCC28070", + "allResponseList" : [ { + "contentId" : "3326915", + "userName" : "John Griffin1", + "rankPoints" : "32175", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 10:47 AM", + "userId" : "1693693", + "content" : "Hello Kaji, Yes it is possible to control the UCC28070 with resistor sensing of the boost FET current. Attached is a schematic which shows how to modify the UCC28070 EVM by replacing the current transformers with shunt resistors on the source connection of the FETs. 7120.TIDA-0130A(001)_Sch.PDF Regards John" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC28070" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899902.json b/data/json/DLP/899902.json new file mode 100644 index 0000000000000000000000000000000000000000..0e5021550764737773b2c852aa8e65ff03f13fab --- /dev/null +++ b/data/json/DLP/899902.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899902", + "reporterName" : "Sumangala Shivanna", + "rankPoints" : "150", + "resolutionStatus" : "Resolved", + "ticketName" : "LM22674: Vin_min requirement", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 17", + "queryText" : "Part Number: LM22674 Hi, I want to use LM22674 regulator in my design to convert 9V from a battery to 5V. I calculated the Vin_min as per datasheet and and a value of 7.6V for I_out = 500 mA. But when simulated in webench, its taking Vin till 6.5 V. Since it is battery sourced, cutting off supply at 7 V is like wasting the power left in battery. Can you please help me out here? What should be the minimum input voltage for V_out = 5V? Thank you!", + "partNumber" : " LM22674", + "allResponseList" : [ { + "contentId" : "3326848", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 24, 2020 9:22 AM", + "userId" : "3498075", + "content" : "Hi Sumangala, I recommend TPS560430 for your application. LM22674 is old part which may not support high duty cycle operation while Vin close to Vout B R Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM22674" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899904.json b/data/json/DLP/899904.json new file mode 100644 index 0000000000000000000000000000000000000000..2a9dab30ddbd80ac973b0f2c621d195aa134082a --- /dev/null +++ b/data/json/DLP/899904.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899904", + "reporterName" : "Tom Rahav", + "rankPoints" : "20", + "resolutionStatus" : "Resolved", + "ticketName" : "Enquiry regarding pico-projection module for a new product", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 48", + "queryText" : "Hello, For a new project we are working on we require a pico-projector that is capable of projecting on various surfaces and in various conditions. Here are the main characteristics / requirements: Module size: the projection module shall be as small (and as light) as possible because the end-product will be portable. The smaller and lighter, the better. Temperature range: the end-product shall be functional in temperature range of -10oC to 50oC Durability: the end-product will be used outdoor in various conditions. We don’t need a military-grade resistance, but certain shock resistance is need. Image definition and resolution: the information that will be projected is relatively simple and will be projected from a distance of 1~2 meters away from the surface. The idea is to have an image of 50-100cm wide maximum. There is no need for high-definition or super high resolution for that matter. Lighting conditions: the device will potentially be used at all times, so the projected image shall be clear enough in both bright daylight and dark conditions. Focal point: The projection will be done while the end-product is moving, so the distance from the projection module and the surface can vary +/- 30cm. The projection unit shall be capable to compensate for these variations by auto-focusing. Projection surface: the image shall be projected on various surfaces, not necessarily smooth. The surfaces will remain mostly flat, but some of them might be slightly curved. Electricity: the projection module will be fed by another, separate, module that will include a battery. Data transfer: the information to be projected will come from the user’s mobile phone. Ideally, the projection module will include a Bluetooth interface that allows this data exchange. Otherwise, the battery module will handle the data exchange with the mobile phone and then transfer the information to be displayed to the projection module via physical cables. Please advise ifcompany has a suitable product and contact me for further discussion. Thank you.", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3327356", + "userName" : "Vivek Thakur", + "rankPoints" : "9880", + "rankName" : "Genius", + "date" : "Apr 24, 2020 5:17 PM", + "userId" : "9052", + "content" : "Hello Tom, Welcome to DLP forum and thank you for your interest in DLP technology. Appreciate the detailed description of your requirements. I would like to clarify thatcompany manufactures and markets only electronic components. We have extensive ecosystem of optical engine manufactures and system integrators who provide an optical engine or a finished product. I would like to recommend that you review the application note \"TI DLP® System Design: Brightness Requirements and Trade-offs\". /lit/an/dlpa068b/dlpa068b.pdf?ts=1587746857718 This application note will be helpful in finalizing your brightness requirement. Are you looking for finished Pico projector or want to buy an optical engine and integrate into your product by building your own electronics? If you are looking for an optical engine, please use \"DLP® Products optical module search tool\" to identify readily available optical engines from our ecosystem of optical engine manufacturers. /tool/DLP-OMM-SEARCH However, if you are looking for a complete pico projector ,please reach out optical engine manufacturers like Young Optics, coretornic they may be able to provide you a finished product. Please let us know if you have any follow-up question. regards, Vivek" + }, { + "contentId" : "3327795", + "userName" : "Tom Rahav", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 25, 2020 6:53 AM", + "userId" : "6328578", + "content" : "Dear Vivek, Thank you very much for the valuable reply. I will explore further the resources you provided and will contact you again if needed." + } ], + "tags" : [ ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899905.json b/data/json/DLP/899905.json new file mode 100644 index 0000000000000000000000000000000000000000..a8672d0e8ebffb74c9705ea8ff1a1cbac91a4b73 --- /dev/null +++ b/data/json/DLP/899905.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "899905", + "reporterName" : "Jack Tan80", + "rankPoints" : "5635", + "resolutionStatus" : "Resolved", + "ticketName" : "UCD3138: enable dflash option in multi-image firmware download", + "rankName" : "Genius", + "replies" : " 4", + "views" : " 18", + "queryText" : "Part Number: UCD3138 Dear UCD friends, Hope everything is doing good with you and your family. Currently I have a project that both primary side and secondary side are using UCD3138, and UART interface was used to communicate those 2 devices. There is a requirements that update primary side UCD3138 firmware from the secondary side pmbus interface. First, host send primary side data to secondary side UCD3138 via pmbus, and then secondary side ucd3138 send those data to primary side via UART. Here I came up with a idea using multiimage option in GUI for testing my firmware, and use multi-image firmware download for updating the pflash and dflash contents, and when I click on read multiimage parameter on GUI, I saw there are Data flash parameter, can you please help me know how to enable to update dflash via multiimage downlaod option?", + "partNumber" : " UCD3138", + "allResponseList" : [ { + "contentId" : "3327039", + "userName" : "Ian Bower", + "rankPoints" : "9985", + "rankName" : "Genius", + "date" : "Apr 24, 2020 1:23 PM", + "userId" : "178868", + "content" : "We haven't written code to support the data flash write on the multi-image code. Generally for downloading new versions of code in the field, the data flash holds calibration data, so you don't want to change that. If you want to calculate and store new data flash data, that needs to be done as part of the version switching process. It shouldn't be too hard for you to add a data flash write to the state machine. I think you could just add support for the data flash addresses to the existing state machine. I think that the GUI will just give you the address for the data flash. You will have to look at the address and decide what key to write to the flash key register. I am looking to find out the message format for the multiimage parameters. They added a byte for data flash download with the boot flash, and if the GUI sees the extra byte, it gets the extra data. I'll try to get that to you soon." + }, { + "contentId" : "3327075", + "userName" : "Ian Bower", + "rankPoints" : "9985", + "rankName" : "Genius", + "date" : "Apr 24, 2020 1:55 PM", + "userId" : "178868", + "content" : "Jack, here is the command. Note that the current multiimage code only supports up to the erase page size, and the GUI will support that version as well. 0 is a 4 byte checksum, and 1 is an 8 byte checksum. For number of devices, 0 = 1 device, 1 = 2 devices, and so on." + }, { + "contentId" : "3327077", + "userName" : "Ian Bower", + "rankPoints" : "9985", + "rankName" : "Genius", + "date" : "Apr 24, 2020 1:56 PM", + "userId" : "178868", + "content" : "Also, you will have to decide how much data flash you want to erase when you get the erase command for the inactive block." + }, { + "contentId" : "3327750", + "userName" : "Jack Tan80", + "rankPoints" : "5635", + "rankName" : "Genius", + "date" : "Apr 25, 2020 3:44 AM", + "userId" : "4842904", + "content" : "Hi Ian, Thanks for supporting here. I've tried your solution of reading the dflash start&end address to GUI, this will insert GUI to start to downloading dflash. It works now. Thanks..." + } ], + "tags" : [ "/support/power-management/f/196/tags/UCD3138" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899906.json b/data/json/DLP/899906.json new file mode 100644 index 0000000000000000000000000000000000000000..e140a04a6e45425e32255adc5e3a4dece5b25ea2 --- /dev/null +++ b/data/json/DLP/899906.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899906", + "reporterName" : "Sammi Shang", + "rankPoints" : "2880", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ24296M: bq24296m driver for linux", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 7", + "queryText" : "Part Number: BQ24296M Dear team, Could you provide the c code for bq24296M RTOS driver or Linux driver? Thanks. Best regards, Sammi", + "partNumber" : " BQ24296M", + "allResponseList" : [ { + "contentId" : "3327117", + "userName" : "Ning T", + "rankPoints" : "15365", + "rankName" : "Genius", + "date" : "Apr 24, 2020 2:23 PM", + "userId" : "145100", + "content" : "Sammi, Please visit /support/power-management/f/196/t/878463 for BQ2429X: Schematic Review and PCB Layout Design Tips and /support/power-management/f/196/t/875388 for BQ2419X/2429x FAQs. FAQ #6 answers your question. Thanks, Ning." + } ], + "tags" : [ "/support/power-management/f/196/tags/bq24296M" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899908.json b/data/json/DLP/899908.json new file mode 100644 index 0000000000000000000000000000000000000000..67c59f4bb6f3d396ea8fdb3c13d07ccbbb53e7b5 --- /dev/null +++ b/data/json/DLP/899908.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899908", + "reporterName" : "user4773172", + "rankPoints" : "1380", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM5170EVM-BIDIR: Inquire Buck(CC) and Boost(CV) control circuit", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 8", + "queryText" : "Part Number: LM5170EVM-BIDIR Hi Sir, May I learn from you does LM5170 can be used on below application? 1. In normal condition, from input to output is Boost topology and CV control. 2. If output higher than input, then change to Buck topology and CC control. Do we have reference circuit can achieve this feature? Thank you. Edward Chen", + "partNumber" : " LM5170EVM-BIDIR", + "allResponseList" : [ { + "contentId" : "3327475", + "userName" : "Youhao Xi", + "rankPoints" : "39085", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 7:10 PM", + "userId" : "1880260", + "content" : "Hi User, From your description, what you need is a buck-boost circuit. To use the LM5170, you can refer to /tool/PMP15035, using two stage to implement the buck-boost function. You can control CC and CV for the output stage. By controlling ISETA, you can implement CC. You may also consider LM5176 four switch buck-boost, and the CC is implemented with ISNS(+) nd ISNS(-). Thanks, Youhao Xi, Applications ENgineering" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM5170EVM_2D00_BIDIR", "/support/power-management/f/196/tags/LM5170" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899910.json b/data/json/DLP/899910.json new file mode 100644 index 0000000000000000000000000000000000000000..a07be12578e2c291b14a3b3a0cd1365aba62e40a --- /dev/null +++ b/data/json/DLP/899910.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899910", + "reporterName" : "Rui Zhang35", + "rankPoints" : "30", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM2733: alternative for LM2733 and MC33063A", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 10", + "queryText" : "Part Number: LM2733 Hi Team, Is there any nex gen or alternative for LM2733 or MC33063A?", + "partNumber" : " LM2733", + "allResponseList" : [ { + "contentId" : "3326835", + "userName" : "Zack Liu", + "rankPoints" : "12495", + "rankName" : "Genius", + "date" : "Apr 24, 2020 9:00 AM", + "userId" : "4961181", + "content" : "Hi Rui, Please share the Vin range, Vout, Iout specifications so that we can suggest acompany boost device for you." + } ], + "tags" : [ "/support/power-management/f/196/tags/lm2733", "/support/power-management/f/196/tags/MC33063A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899913.json b/data/json/DLP/899913.json new file mode 100644 index 0000000000000000000000000000000000000000..1a26ac201c249d9148d963468b13d36c6dd8fc79 --- /dev/null +++ b/data/json/DLP/899913.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899913", + "reporterName" : "Ming Zhang2", + "rankPoints" : "40", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "IWR6843: regard antenna design", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 13", + "queryText" : "Part Number: IWR6843 Good day. Is there any design guide or requirement for antenna? thanks.", + "partNumber" : " IWR6843", + "allResponseList" : [ { + "contentId" : "3327296", + "userName" : "zigang Yang", + "rankPoints" : "7975", + "rankName" : "Expert", + "date" : "Apr 24, 2020 4:25 PM", + "userId" : "44611", + "content" : "HI, Ming: For iwr6843, two type antenna modules are available. They are ISK module and ODS module. The ISK module has narrower FOV on elevation direction and stronger gain on the azimuth direction, it also has better angle resolution in azimuth direction. On the other hand, ODS has wide FOV on both elevation and azimuth direction. And it has lower gain. In the system level, it is more of a tradeoff between FOV, gain, and angle resolution. Users can design the antenna based on their needs. The following document has some details on different antenna modules. /lit/ug/swru546b/swru546b.pdf?ts=1587744972526 Best, Zigang" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR6843" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899914.json b/data/json/DLP/899914.json new file mode 100644 index 0000000000000000000000000000000000000000..a943396d38193e0aa6912ab0c72bd207b493363a --- /dev/null +++ b/data/json/DLP/899914.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899914", + "reporterName" : "cyan zhou", + "rankPoints" : "900", + "resolutionStatus" : "Resolved", + "ticketName" : "LM75A: LM75AIM/NOPB: About Powe on sequential", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 29", + "queryText" : "Part Number: LM75A Hicompany expert, We are now using LM75AIM/NOPB, here is a question, please help to check it. If the time interval from power-on to start access is less than about 120ms, it is possible that the device will enter shutdown mode and fail to read the register values properly (readable, all the value is 0). Do the Device have the power on sequential? How can this be avoided. thanks. Cyan", + "partNumber" : " LM75A", + "allResponseList" : [ { + "contentId" : "3327029", + "userName" : "David Vaseliou", + "rankPoints" : "4830", + "rankName" : "Expert", + "date" : "Apr 24, 2020 1:10 PM", + "userId" : "4910861", + "content" : "Hi Cyan, You must wait until at least one conversion cycle is completed before polling the device (min of 300ms). Please see see table note 3 on page 4 of the datasheet. \"When the LM75A is accessed, the conversion that is in process will be interrupted and it will be restarted after the end of the communication. Accessing the LM75A continuously without waiting at least one conversion time between communications will prevent the device from updating the Temperature Register with a new temperature conversion result. Consequently, the LM75A should not be accessed continuously with a wait time of less than 300ms\". Thanks, David" + }, { + "contentId" : "3327872", + "userName" : "cyan zhou", + "rankPoints" : "900", + "rankName" : "Intellectual", + "date" : "Apr 25, 2020 4:06 PM", + "userId" : "4226617", + "content" : "David I've seen that, thanks very much." + } ], + "tags" : [ "/support/sensors/f/1023/tags/LM75A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899916.json b/data/json/DLP/899916.json new file mode 100644 index 0000000000000000000000000000000000000000..ff62fb805b7468036ca10fba8545aee4ccb8ee09 --- /dev/null +++ b/data/json/DLP/899916.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899916", + "reporterName" : "Wei Zhang6", + "rankPoints" : "120", + "resolutionStatus" : "", + "ticketName" : "BQ51050B: There is no PCB Project file and other files in the TIDA-00669 Altium compressed package", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 25", + "queryText" : "Part Number: BQ51050B Hi, I got a problem of TIDA-00669 Altium compressed package. There is no PCB Project file and other files in the TIDA-00669 Altium compressed package. Could you please give a complete version of the TIDA-00669 Altium file compressed package to me? Thank you. Kind regards, Hubery", + "partNumber" : " BQ51050B", + "allResponseList" : [ { + "contentId" : "3327664", + "userName" : "Bill Johns", + "rankPoints" : "46985", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 11:13 PM", + "userId" : "244698", + "content" : "Hello Yes a PrjPCB file is not included with TIDA-00669, create a new project and import PCB and schematic in." + } ], + "tags" : [ "/support/power-management/f/196/tags/bq51050B", "/support/power-management/f/196/tags/TIDA_2D00_00669" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899919.json b/data/json/DLP/899919.json new file mode 100644 index 0000000000000000000000000000000000000000..0178d1b2d11e47cd3ca961247d5cf70aae38870a --- /dev/null +++ b/data/json/DLP/899919.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899919", + "reporterName" : "George Sephton1", + "rankPoints" : "20", + "resolutionStatus" : "", + "ticketName" : "TPS2112: TPS2112 Quiescent Currents", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 10", + "queryText" : "Part Number: TPS2112 Hi, I have the following circuit: With 3V from VCELL going into IN2 and 0V on USB_VBUS_3V3, the TPS2112 is adding an extra 35-40uA onto the total current draw. Is there any way to reduce this down to around 2 or 3 uA? Cheers", + "partNumber" : " TPS2112", + "allResponseList" : [ { + "contentId" : "3327305", + "userName" : "Andy Robles", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 4:33 PM", + "userId" : "6043129", + "content" : "Hi George, The TPS2112 will always consume some amount of current to operate through either channel. This current is found to be 55uA typical with an input supply of 5.5V. With an input of 3V you will see a decrease in current to consumption to operate which is what I believe is the 35-40uA you are seeing. Since this is the current the device is consuming to operate there is no way of reducing this current to 2-3uA. Is the 35-40uA of current the overall current consumption from the switch you are observing or is it 35-40uA on top of the 55uA typical current consumption of the switch? Best regards, Andy Robles" + }, { + "contentId" : "3329986", + "userName" : "George Sephton1", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 28, 2020 6:45 AM", + "userId" : "6331865", + "content" : "Hi Andy, Thanks for the response. The 35-40uA is the current draw from the TPS2112 alone so I guess this just isn't suitable for my application. Do you have any alternate solutions for switching between a battery source and a USB source where current consumption is in the region of a few uA? My battery is a coin cell so a small current draw is crucial. I need a switching circuit so that when the user connects a USB cable, the power is pulled from USB in order to conserve battery life, but when the USB cable is removed, the power will revert to being drawn from the cell. Many thanks, George." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS2112", "/support/power-management/f/196/tags/Quiescent%2bcurrent", "/support/power-management/f/196/tags/current%2bdraw" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899929.json b/data/json/DLP/899929.json new file mode 100644 index 0000000000000000000000000000000000000000..9444aed271310d2a808ccc9c413cf5e40cdde5d2 --- /dev/null +++ b/data/json/DLP/899929.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899929", + "reporterName" : "Minqi Zhao", + "rankPoints" : "1100", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ25616: Type C charger solution", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 16", + "queryText" : "Part Number: BQ25616 Dear expert, My customer need a 1s fast charger IC that support Type C standard. Besides 5V3A, they may also consider 9V/12V PD protocol so the current on cable can be reduced. Now customer selected BQ25616, but their board is small so they concerned about thermal problem. Could you share some suggestions about their design? Besides, our charger device don't have charging port controller. Now I recommend TUSB321 and TPS65988, do you have some insight about the compatible protocol IC with BQ25616? Thanks.", + "partNumber" : " BQ25616", + "allResponseList" : [ { + "contentId" : "3327359", + "userName" : "Hong Mao", + "rankPoints" : "4010", + "rankName" : "Expert", + "date" : "Apr 24, 2020 5:21 PM", + "userId" : "4779728", + "content" : "Hi Minqi: BQ25616 can take up 13.5V input voltage. So there is no problem to support 9V or 12V input. The maximum charge current is 3A. Depending on the charge current, the board can be sized properly based on power loss on the board. The customer may look up the efficiency and calculated total power loss on inductor and IC. The IC temperature rise can be estimated. BQ25616 is a standard alone charger. It should be working with other PD controller. Regards, Hong" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS65988", "/support/power-management/f/196/tags/BQ25616", "/support/power-management/f/196/tags/TUSB321" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899930.json b/data/json/DLP/899930.json new file mode 100644 index 0000000000000000000000000000000000000000..c6fb07ffdfbbb96a66c31b5c2e5f0a598c84e468 --- /dev/null +++ b/data/json/DLP/899930.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899930", + "reporterName" : "Kris Lin", + "rankPoints" : "725", + "resolutionStatus" : "Resolved", + "ticketName" : "AWR1642: Question about warm-reset feature that use external watch dog ?", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 17", + "queryText" : "Part Number: AWR1642 Hi, I have used the ext. WDT to implement warm-reset. As far as I know, the warm-reset would be triggered if MSS, DSS or BSS fails. My question is that if DSS or BSS is crashed, will a warm-reset be triggered? Thanks.", + "partNumber" : " AWR1642", + "allResponseList" : [ { + "contentId" : "3327062", + "userName" : "Jitendra Gupta", + "rankPoints" : "33995", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 1:47 PM", + "userId" : "1717369", + "content" : "Hello Kris, Warm reset can be triggered via internal WDT expire and with the specific code also MSS can trigger the warm reset to the device. BSS sends CPU/ESM fault async-event to MSS over mailbox based on which MSS application can trigger the warm reset or let WDT expired. Same way you can implement for DSS crash as well where if DSS can send a specific crash message over mailbox to MSS to notify about the fault. Or if DSS doesn't send periodic object result within specific interval then MSS can trigger the warm reset/ or let WDT expired. Regards, Jitendra" + } ], + "tags" : [ "/support/sensors/f/1023/tags/awr20_5F00_p1_5F00_swa20_5F00_warmreset", "/support/sensors/f/1023/tags/AWR1642" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899937.json b/data/json/DLP/899937.json new file mode 100644 index 0000000000000000000000000000000000000000..3db5d9b29aa20efaddff70e952fc9b72997c7312 --- /dev/null +++ b/data/json/DLP/899937.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899937", + "reporterName" : "Emma Wang_DELL EMC", + "rankPoints" : "655", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "CCS/BQ40Z60: lifetime unit and", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 10", + "queryText" : "Part Number: BQ40Z60 Tool/software: Code Composer Studio 1, STL and STH unit in sluuao4d is 2 hours. But in .gg file, STL and STH unit in dataflash lifetime section is h. Could you help check which one is right?5707.7_19_6_3 version.gg.csv 2, Does data come from RAM lifetime data or lifetime data in dataflash lifetime esction when I use ManufacturerAccess() 0x0060 Lifetime Data Block 1,2, 3, 4, and 5 to get lifetime data? Thanks!", + "partNumber" : " BQ40Z60", + "allResponseList" : [ { + "contentId" : "3327575", + "userName" : "Eric Vos24", + "rankPoints" : "3585", + "rankName" : "Expert", + "date" : "Apr 24, 2020 9:34 PM", + "userId" : "3440231", + "content" : "Emma, Reading the command will return the RAM contents. RAM is written to flash every 10hours. If a reset occurs during the 10 hours the RAM will be lost and will be re-initialized to the last flash write. Thanks, Eric Vos" + } ], + "tags" : [ "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2b%2bBQstudio", "/support/power-management/f/196/tags/code%2bComposer%2bstudio", "/support/power-management/f/196/tags/bq40z60" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899938.json b/data/json/DLP/899938.json new file mode 100644 index 0000000000000000000000000000000000000000..26ea0298196a9a0875f73fe280ecf065537d5ee7 --- /dev/null +++ b/data/json/DLP/899938.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899938", + "reporterName" : "Yusuke Mukuno", + "rankPoints" : "3545", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "CSD25501F3: Gate resistance and Td spec", + "rankName" : "Expert", + "replies" : " 3", + "views" : " 21", + "queryText" : "Part Number: CSD25501F3 Hi Expert, CSD25501F3 has Gate resistance Rc(10kohm) + Rg(33ohm) between G pin to Gate. Customer feels, it is too big. they think, the Raising time and the Falling time will become longer than datasheet spec. Is the following figure correct? Could you please let me know about Min value and Max value for the following Td parameters? Thanks Muk", + "partNumber" : " CSD25501F3", + "allResponseList" : [ { + "contentId" : "3327157", + "userName" : "John Wallace1", + "rankPoints" : "9460", + "rankName" : "Genius", + "date" : "Apr 24, 2020 2:59 PM", + "userId" : "3502056", + "content" : "Hello Muk san, Thanks for promotingcompany FETs at your customer. The switching times are only measured on samples from 3 lots at characterization during product development and we do not spec or guarantee min or max values. You can find more details under the Support & training tab on the MOSFET landing page on . Click on Understanding MOSFET data sheets and you will see a link for Switching Parameters. I cannot share the characterization data here but will send you more details in an email." + }, { + "contentId" : "3328183", + "userName" : "Yusuke Mukuno", + "rankPoints" : "3545", + "rankName" : "Expert", + "date" : "Apr 27, 2020 12:37 AM", + "userId" : "1293847", + "content" : "Hi John-san, Thank you for your answer! I received your e-mail. Thanks. Could you please give me your comment for 10kohm Gate resistance? Muk" + }, { + "contentId" : "3328735", + "userName" : "John Wallace1", + "rankPoints" : "9460", + "rankName" : "Genius", + "date" : "Apr 27, 2020 1:02 PM", + "userId" : "3502056", + "content" : "Hi Muk san, The 10kohm gate clamping resistor allows this device to have an abs max VGS rating of -20V. The gate-source ESD diode acts a zener with a breakdown voltage of ~6V. The 10kohm resistor limits the current and therefore power dissipated in the gate-source clamping diode." + } ], + "tags" : [ "/support/power-management/f/196/tags/CSD25501F3" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899945.json b/data/json/DLP/899945.json new file mode 100644 index 0000000000000000000000000000000000000000..f77e33910fd44fb5d3d4fa3f4c9de275d1ba03d4 --- /dev/null +++ b/data/json/DLP/899945.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899945", + "reporterName" : "Penn Zhang", + "rankPoints" : "850", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ21061: I2C reset", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 15", + "queryText" : "Part Number: BQ21061 Hello Expert, Could you help explain more details about tI2CRESET I 2C interface inactive reset timer 500ms? As the picture below, I can't find more in the datasheet. Thanks.", + "partNumber" : " BQ21061", + "allResponseList" : [ { + "contentId" : "3328002", + "userName" : "Penn Zhang", + "rankPoints" : "850", + "rankName" : "Intellectual", + "date" : "Apr 26, 2020 7:21 AM", + "userId" : "5617536", + "content" : "Hello, In my opinion, Twatchdog means we need to write watchdog within every 50s, otherwise, all settings will be set to default. Ti2crest limited I2C need to active every 500ms? what does the definition of inactive? Thanks." + }, { + "contentId" : "3329417", + "userName" : "Raheem", + "rankPoints" : "16655", + "rankName" : "Genius", + "date" : "Apr 27, 2020 7:48 PM", + "userId" : "4697250", + "content" : "Hello, It is a timer to prevent I2C hangup. If any transaction takes longer, the I2C is reset." + } ], + "tags" : [ "/support/power-management/f/196/tags/bq21061" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899946.json b/data/json/DLP/899946.json new file mode 100644 index 0000000000000000000000000000000000000000..6430e9ae52f62da9feb8c2df4c1ca3b809365878 --- /dev/null +++ b/data/json/DLP/899946.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899946", + "reporterName" : "Ramesh V", + "rankPoints" : "10", + "resolutionStatus" : "", + "ticketName" : "PTH04T260W: Thermal data", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 9", + "queryText" : "Part Number: PTH04T260W Please provide values of thermal resistance between junction and board (theta JB) and thermal resistance between junction and case (theta JC).These values are required for thermal simulation", + "partNumber" : " PTH04T260W", + "allResponseList" : [ { + "contentId" : "3327017", + "userName" : "Chris Glaser", + "rankPoints" : "131565", + "rankName" : "Guru", + "date" : "Apr 24, 2020 12:58 PM", + "userId" : "1090425", + "content" : "Hi Ramesh, This is quite an old, large, and expensive device. What key feature does it have that you need? We have the TPS82085, TPSM82810/3, and LMZ30604 as alternates for a 3A/4A module." + } ], + "tags" : [ "/support/power-management/f/196/tags/PTH04T260W" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899947.json b/data/json/DLP/899947.json new file mode 100644 index 0000000000000000000000000000000000000000..a1fbed1c9e683d16f0fe537a898ae1b50b723456 --- /dev/null +++ b/data/json/DLP/899947.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899947", + "reporterName" : "user5863743", + "rankPoints" : "120", + "resolutionStatus" : "", + "ticketName" : "WEBENCH® Tools/LM25117: LM25117QPMH", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 10", + "queryText" : "Part Number: LM25117 Tool/software: WEBENCH® Design Tools LM25117QPMH: IN:20-32V ； out：12V10A； No load, the voltage down slowly，about 0.001/5 seconds ，The final voltage drift。 please help me to solve the question。thanks", + "partNumber" : " LM25117", + "allResponseList" : [ { + "contentId" : "3327251", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 3:57 PM", + "userId" : "1881345", + "content" : "Hello Please send your schematics and a view of your PCB layout. Also, any wave-forms of the switch node and inductor current you may have. How far does the voltage drift? If the drift is very slow, it may be a thermal issue. Thanks" + }, { + "contentId" : "3329956", + "userName" : "user5863743", + "rankPoints" : "120", + "rankName" : "Prodigy", + "date" : "Apr 28, 2020 6:14 AM", + "userId" : "5863743", + "content" : "THE LM25117QPMH is your company 's products?" + } ], + "tags" : [ "/support/power-management/f/196/tags/WEBENCH_AE00_%2bDesign%2bTools", "/support/power-management/f/196/tags/LM25117" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899949.json b/data/json/DLP/899949.json new file mode 100644 index 0000000000000000000000000000000000000000..b0609899bcedab7a864ca880449d75600f7e612e --- /dev/null +++ b/data/json/DLP/899949.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899949", + "reporterName" : "Andy_Lin", + "rankPoints" : "1670", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS546C20A: parallel 2 TPS546C20A", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 14", + "queryText" : "Part Number: TPS546C20A Hi Team, I would like to have a quick check on TPS546C20A , per d/s says, this device can be paralleled together to provide up to 70-A load. for the 70A load , it means continue load current , not peak current , is that correct?", + "partNumber" : " TPS546C20A", + "allResponseList" : [ { + "contentId" : "3327000", + "userName" : "Peter James Miller", + "rankPoints" : "19805", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 12:45 PM", + "userId" : "8518", + "content" : "Andy_Lin The TPS546C20A is rated for 35A continuous current. It's Peak current is limited by the programmable range of its current limit functions. However, as with any converter, the continuous thermal current rating may also be limited by the available air-flow, ambient air-temperature and the device's safe operating area due to the resulting die temperature. See figures 20, 21, and 22 on page 13 of the datasheet for more guidance: /lit/ds/symlink/tps546c20a.pdf#page=13 If you need more current capability than the TPS546C20A can provide, I would suggest reviewing the TPS546D24A, a 40A Integrated FET converter that also has PMBus and is stackable upto 4 devices. /product/tps546d24a" + }, { + "contentId" : "3328822", + "userName" : "Andy_Lin", + "rankPoints" : "1670", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 1:49 PM", + "userId" : "5344588", + "content" : "Hi Peter , thanks for your detail feedback. customer would like to used 2 of TPS546C20A in parallel , and provide around 45 A(continuous) for their chips as supply, that's why it has this question . Looks its OK to used it this way , and the current limit can set through PMbus , I will let customer know the comment and see if there's more questions to check. thanks again!! Andy" + }, { + "contentId" : "3329043", + "userName" : "Peter James Miller", + "rankPoints" : "19805", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 3:39 PM", + "userId" : "8518", + "content" : "You are most welcome Andy_Lin I am glad that I could help." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS546C20A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899951.json b/data/json/DLP/899951.json new file mode 100644 index 0000000000000000000000000000000000000000..283a89267ba6a08145f3ae52bbe7b40b9c509d9b --- /dev/null +++ b/data/json/DLP/899951.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899951", + "reporterName" : "Mehmet ERCAN", + "rankPoints" : "10", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ78PL116:BQ78PL116 software", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 7", + "queryText" : "Part Number: BQ78PL116 /support/power-management/f/196/t/73237?bqWizard-3-0-16 I need BQWIZARD 3.0 software for BQ78PL116 product. Could you help?", + "partNumber" : " BQ78PL116", + "allResponseList" : [ { + "contentId" : "3327565", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 24, 2020 9:26 PM", + "userId" : "3528441", + "content" : "Hello, This is on the product page. Please install from there. Again this is NRND part, please refer to bq40z50 and bq34z100." + } ], + "tags" : [ "/support/power-management/f/196/tags/bqWizard", "/support/power-management/f/196/tags/bq78PL116" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899954.json b/data/json/DLP/899954.json new file mode 100644 index 0000000000000000000000000000000000000000..4193e7bc747bc7eb4158c07246c8df844692cf80 --- /dev/null +++ b/data/json/DLP/899954.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899954", + "reporterName" : "Roy Chou1", + "rankPoints" : "1580", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "DC/DC Layout Guide", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 11", + "queryText" : "Hi Team, Do we have Layout guide APP note for DC/DC converter like buck/boost/buck-boost? I know we have layout guideline in each IC datasheet, but I would like to know if we have general layout guideline. Thanks. Regards, Roy", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3326951", + "userName" : "Milos", + "rankPoints" : "7260", + "rankName" : "Expert", + "date" : "Apr 24, 2020 11:45 AM", + "userId" : "5692358", + "content" : "Hi Roy, Here are some guidelines: /lit/slva773 /lit/slyt614 /lit/snva638 Best regards, Milos" + } ], + "tags" : [ ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899960.json b/data/json/DLP/899960.json new file mode 100644 index 0000000000000000000000000000000000000000..4a99e935ce1040e891a010ae5b6829d62e0152ae --- /dev/null +++ b/data/json/DLP/899960.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899960", + "reporterName" : "Tsukui Yusuke", + "rankPoints" : "18635", + "resolutionStatus" : "", + "ticketName" : "BQ25703A: About AUTO_WAKEUP_EN function", + "rankName" : "Guru", + "replies" : " 1", + "views" : " 15", + "queryText" : "Part Number: BQ25703A Hi, Could you tell me about AUTO_WAKEUP_EN? If the charging current is changed when the AUTO_WAKEUP_EN function is activated, which current has priority? (Charge Option 0 is the default setting status.) Customer sets MinSystem Voltage to 12V, If the voltage obtained from the gas gauge is less than 12V, CHARGE CURRENT is set to 250mA. Which does bq25703A prioritize, 128 mA or 250 mA? Best regards, Yusuke", + "partNumber" : " BQ25703A", + "allResponseList" : [ { + "contentId" : "3327514", + "userName" : "Tiger Zhou", + "rankPoints" : "610", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 8:12 PM", + "userId" : "1451791", + "content" : "The host can overwrite the charge current to 250mA and take the priority." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25703A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899966.json b/data/json/DLP/899966.json new file mode 100644 index 0000000000000000000000000000000000000000..154781abb449965285aad4242d31889e4014f5ee --- /dev/null +++ b/data/json/DLP/899966.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899966", + "reporterName" : "Keiju Nakano", + "rankPoints" : "10", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM3488: with out soft start", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 8", + "queryText" : "Part Number: LM3488 i did design SEPIC with LM3488 for UPS board, but that need more quick startup for power source transient. i want compatible IC without soft start , or adjustable. is it in lineup?", + "partNumber" : " LM3488", + "allResponseList" : [ { + "contentId" : "3327747", + "userName" : "Richard Fu22", + "rankPoints" : "2925", + "rankName" : "Intellectual", + "date" : "Apr 25, 2020 3:22 AM", + "userId" : "5003147", + "content" : "Hi Keiju, Thank you for using the LM3488 in your design. Unfortunately, LM3488 does not appear to have adjustable soft-start. I would recommend looking at the newer IC's, such as the LM5155. The LM5155 can be thought of as an upgrade to the LM3488 with lower quiescent current, higher efficiency, and more features than that of the LM3488 including adjustable soft-start. Thanks, Richard" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM3488", "/support/power-management/f/196/tags/SEPIC" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899971.json b/data/json/DLP/899971.json new file mode 100644 index 0000000000000000000000000000000000000000..ff4e591ae1a2693abad15072ec54753a91c1ed3e --- /dev/null +++ b/data/json/DLP/899971.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899971", + "reporterName" : "Kao Mick", + "rankPoints" : "130", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS548B22: TPS548B22 switch node negative Spike", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 28", + "queryText" : "Part Number: TPS548B22 HI SIR We use tps548B22 to design 12V to 0.8V_14A, and measure the switch node negative Spike beyond the maximum value. We have been very close to the ic body to measure this voltage waveform. We want to confirm whether such a situation will cause damage? Can we use RC snubber or TVS to suppress this phenomenon? The equipment we use is as follows ~~ Tektronix P5205A-2 High Voltage Differential Probe 100MHz 50X Bandwidth no limit Oscilloscope: Tektronix DPO5104B 1 GHz digital 4 ch Bandwidth: 1GHz", + "partNumber" : " TPS548B22", + "allResponseList" : [ { + "contentId" : "3326992", + "userName" : "Peter James Miller", + "rankPoints" : "19805", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 12:36 PM", + "userId" : "8518", + "content" : "Kao Mick While this is unlikely to cause damage, it is always recommended to keep the device within its listed datasheet maximums. Yes, you can use a snubber from the SW not to PGND node. I would recommend starting with a 1nF snubber with a 1-Ohm resistor and working from there. Layout of a snubber is critical to keep the loop inductance as short as possible so that the snubber is effective at ~120MHz where this ringing is occurring. A small, ultra-fast rectifier diode directly between the SW node and PGND may be able to react fast enough to shunt some of the current and reduce the negative peak, but I would not recommend a TVS diode as a TVS diode is unlikely to react fast enough to provide much peak suppression You can also try changing C29 from 100nF to 10nF. These smaller capacitor values in 0402 packages offer lower ESL and the ability to suppress higher frequency noise. We have seen significant SW ringing improvement placing a 2.2nF - 10nF 0402 capacitor from VIN to GND under the VIN pins on the backside of the board when there are vias available to connect VIN and the thermal pad to the backside of the PBC. By providing a separate, parallel path from the main power path, this helps reduce the inductance and high-frequency performance of the bypassing." + }, { + "contentId" : "3328216", + "userName" : "Kao Mick", + "rankPoints" : "130", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 2:12 AM", + "userId" : "6238161", + "content" : "Hi SIR Would you recommend bootstrap to connect 0.1uF in series with 4.7 ohms?" + }, { + "contentId" : "3329124", + "userName" : "Peter James Miller", + "rankPoints" : "19805", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 4:21 PM", + "userId" : "8518", + "content" : "Kao Mick You can add a resistor upto 4.7-ohm in series with the boot strap capacitor (C311 in your schematic) to slow-down the turn-on of the high-side FET and reduce overshoot ringing on the SW node on its rising edge, but the turn-off of the high-side FET does not drive current through the BOOT pin, so it will have minimal effect on the speed of the turn-off. With an external FET controller, adding a resistor in series with the gate drive signal would help reduce the turn-off rate, but with internal drivers and FETs, there is no access to the FET turn-off driver path. You can try replacing D25 with a high-speed rectifier diode, or an R-C snubber to reduce the negative peak on the falling edge of the switching node." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS548B22" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899972.json b/data/json/DLP/899972.json new file mode 100644 index 0000000000000000000000000000000000000000..4452a11821f4f379d750ebdec285d281fe86a117 --- /dev/null +++ b/data/json/DLP/899972.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "899972", + "reporterName" : "user1365602", + "rankPoints" : "20", + "resolutionStatus" : "", + "ticketName" : "BQ27531-G1: the learning cycle does not start because update status is not set", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 17", + "queryText" : "Part Number: BQ27531-G1 Hello, I try to do a learning cycle with the bq27531 on my own board. Therefore I use the bqStudio withe the BQ27GDK000EVM and conected both with my board. I used the application note SLUA903 and carried out all the steps described. But after starting the leraning cycle (sending IT Enable and Reset), the update status did not change. It remains still 0x00. Nevertheless, I started to discharge and charge the battery. Still no change in update status. When charging, I also noticed that FC is not set. To verify this I started another charging cycle (Stopcondition: FC is set). The bit was also not set during the test. Taper current was reached and the Voltage was higher than charging voltage minus taper voltage. However, I do not know whether the capacity requirement has been met. There are two different explanations in SLUUA96A. Chapter 6.6.1.: \"accumulated change in capacity>Min TaperCharge\" Chapter 6.10.1.2.2.: \"Accumulated change in capacity min taper capacity. Can you attach a gg file and log file? FC bit needs to be set here. That's the easiest way to tell if full charge has been reached." + }, { + "contentId" : "3328439", + "userName" : "user1365602", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 7:39 AM", + "userId" : "1365602", + "content" : "Hello Kang, Thanks for your reply. I have only a gg file and log file for the charging cycle. I attached thes two files. I'm going to log the learning cycle as soon as possible. (We use a Panasonic NCR18650B) Thanks, SteveLogFile_Charging.csvGG_File.gg.csv" + }, { + "contentId" : "3329338", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 6:40 PM", + "userId" : "1864278", + "content" : "Hi Steve, Let me know if you can provide a bqStudio log fo the entire learning cycle. Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ27531_2D00_G1", "/support/power-management/f/196/tags/bqStudio" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899973.json b/data/json/DLP/899973.json new file mode 100644 index 0000000000000000000000000000000000000000..68566f25b13a6e419c52095cce42244fe919e162 --- /dev/null +++ b/data/json/DLP/899973.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899973", + "reporterName" : "Pavaman Panchamukhi", + "rankPoints" : "30", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC2897A: Gerber/CAD Files", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 9", + "queryText" : "Part Number: UCC2897A Hi Can you please provide me with Gerber / CAD files for UCC2897A part . We are using VQFN package. It would be helpful if the Gerber / CAD files are of VQFN. BR Pavaman P", + "partNumber" : " UCC2897A", + "allResponseList" : [ { + "contentId" : "3327053", + "userName" : "Sonal Singh", + "rankPoints" : "5240", + "rankName" : "Expert", + "date" : "Apr 24, 2020 1:36 PM", + "userId" : "4787382", + "content" : "Hello Pavaman, Please download the CAD file from the link below: This is available on the product page: https:///product/UCC2897A/toolssoftware Regards, Sonal" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC2897A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899974.json b/data/json/DLP/899974.json new file mode 100644 index 0000000000000000000000000000000000000000..cd24ff9faeda51b147444cd3c50c4ad43f161d16 --- /dev/null +++ b/data/json/DLP/899974.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899974", + "reporterName" : "Kao Mick", + "rankPoints" : "130", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS54425: TPS54425 Switch node negative Spik", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 28", + "queryText" : "Part Number: TPS54425 HI SIR We use tps54425 to design 12V to 1.0V_4A, and measure the switch node negative Spike beyond the maximum value. We have been very close to the ic body to measure this voltage waveform. We want to confirm whether such a situation will cause damage? Can we use RC snubber or TVS to suppress this phenomenon? The equipment we use is as follows ~~ Tektronix P5205A-2 High Voltage Differential Probe 100MHz 50X Bandwidth no limit Oscilloscope: Tektronix DPO5104B 1 GHz digital 4 ch Bandwidth: 1GHz", + "partNumber" : " TPS54425", + "allResponseList" : [ { + "contentId" : "3327005", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Apr 24, 2020 12:50 PM", + "userId" : "24596", + "content" : "Kao, That is barely measuring past -3 V. The most accurate measurement will require a differential probe. I think you will find that if you measure it properly with a differential probe, the negative excursion will be well within specification." + }, { + "contentId" : "3328218", + "userName" : "Kao Mick", + "rankPoints" : "130", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 2:13 AM", + "userId" : "6238161", + "content" : "HI SIR Would you recommend bootstrap to connect 0.1uF in series with 3.3 ohms?" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS54425" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899983.json b/data/json/DLP/899983.json new file mode 100644 index 0000000000000000000000000000000000000000..7fe5d6d669008cafa7190608e953908b70f4e386 --- /dev/null +++ b/data/json/DLP/899983.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899983", + "reporterName" : "user6305027", + "rankPoints" : "10", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "DLP4500NIR: Beam shaping algorithm", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 53", + "queryText" : "Part Number: DLP4500NIR I want to accomplish the laser beam shaping through some algorithm including Lee holography,GS algorithm and so on,but I have some questions for this: 1、 Can I accomplish the only-phase modulation through the holography? Because I had seen a paper shown the only-phase modulation by using DMD 2、Docompany have some example for accomplish beam shaping including Gaussian beam into Laguerre-Gaussian beam or Flat-Top beam", + "partNumber" : " DLP4500NIR", + "allResponseList" : [ { + "contentId" : "3327404", + "userName" : "Vivek Thakur", + "rankPoints" : "9880", + "rankName" : "Genius", + "date" : "Apr 24, 2020 6:01 PM", + "userId" : "9052", + "content" : "Hello, Welcome DLP forum and thank you for your interest in DLP technology. I will ask around with my colleagues and get back. regards, Vivek" + }, { + "contentId" : "3328131", + "userName" : "Vivek Thakur", + "rankPoints" : "9880", + "rankName" : "Genius", + "date" : "Apr 26, 2020 6:16 PM", + "userId" : "9052", + "content" : "Hello, Yes, it should be possible to shape a laser beam arbitrarily with a phase-only SLM. We don't have any past work insidecompany on this subject. There are are several papers that discuss how to do it. One such reference would be a PhD Thesis ; \"Novel implementation of a phase-only spatial light modulator for laser beam shaping\" byLiesl Burger. Department of Laser Physics, University of Stellenbosch, Private Bag X1, Matieland 7602, South Africa. Please let us know if you have any further questions. regards, Vivek" + } ], + "tags" : [ "/support/dlp/f/94/tags/Beam%2bShaping", "/support/dlp/f/94/tags/DLP4500NIR" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899985.json b/data/json/DLP/899985.json new file mode 100644 index 0000000000000000000000000000000000000000..7eaeb96279ea7cfae112935d91ddbf51cd7c35af --- /dev/null +++ b/data/json/DLP/899985.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899985", + "reporterName" : "Giacomo Pirinoli", + "rankPoints" : "40", + "resolutionStatus" : "Resolved", + "ticketName" : "IWR1642: Coordinates data extraction", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 18", + "queryText" : "Part Number: IWR1642 Hi, in my application I am trying to get XY coordinates from IWR1642 device, reading from DATA_port UART; I am able to read and deserialize header (for example coherent magicword=0102-0304-0506-0708, version=02000004, platform=000a1642, TLVtype=1, Z=0, etc; hence I would exclude endianness issue) but the strange fact is that I am not getting any X negative value. Conversely, while running DemoVisualizer I actually have some negative X points: am I missing any additional transformation/conversion? Example: ...[4F][01][28][01][00][00]...-> X=335,Y=296,Z=0 (int16) X=0.6542969,Y=0.578125,Z=0 (float)", + "partNumber" : " IWR1642", + "allResponseList" : [ { + "contentId" : "3327250", + "userName" : "Giacomo Pirinoli", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 3:56 PM", + "userId" : "6326693", + "content" : "Hi, my bad! I was reading from the serial in string format with wrong encoding, leading to byte truncation; after moving to explicit byte reading everything is smooth and clean. Regards," + }, { + "contentId" : "3327277", + "userName" : "Akash Gondalia", + "rankPoints" : "39385", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 4:10 PM", + "userId" : "4768107", + "content" : "Hi Giacomo, I'm glad you were ableto resolve it. If you have more questions feel free to open up a new thread! Regards, AG" + } ], + "tags" : [ "/support/sensors/f/1023/tags/_2300_%2b%2b%2b%2b%2bIWR", "/support/sensors/f/1023/tags/coordinates", "/support/sensors/f/1023/tags/IWR1642" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899988.json b/data/json/DLP/899988.json new file mode 100644 index 0000000000000000000000000000000000000000..14ef8f86d989cc143561d31ca2a6af144a1d51f1 --- /dev/null +++ b/data/json/DLP/899988.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899988", + "reporterName" : "Kazuki Itoh", + "rankPoints" : "1990", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS56339: Adjusting UVLO Threshold", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 24", + "queryText" : "Part Number: TPS56339 Hi team, I know TPS56339 can change UVLO threshold higher by using EN. Can TPS56339 adjust UVLO threshold lower? Regards, Itoh", + "partNumber" : " TPS56339", + "allResponseList" : [ { + "contentId" : "3327865", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Apr 25, 2020 3:10 PM", + "userId" : "24596", + "content" : "Itoh-san, The EN pin control is independent of the internal UVLO for VIN. The device will not turn on if VIN is below the UVLO voltage regardless of the state of EN." + }, { + "contentId" : "3328188", + "userName" : "Kazuki Itoh", + "rankPoints" : "1990", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 1:00 AM", + "userId" : "5298712", + "content" : "Thanks!" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS56339" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899990.json b/data/json/DLP/899990.json new file mode 100644 index 0000000000000000000000000000000000000000..408deec6b653e4045a1b038738809b6ed8689daf --- /dev/null +++ b/data/json/DLP/899990.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899990", + "reporterName" : "Cyril AUGU", + "rankPoints" : "10", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ40Z80: How to write SREC", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: BQ40Z80 Hellocompany Guys, We have exactly the same problem as this previous post : /.../851756 but with the part number BQ40Z80. We are searching a solution for write the file SREC without BqStudio because we dont want any operator interaction in our production system. We didn't find in BqStudio a way to create a golden image and it seems that we are not the only ones : /support/power-management/f/196/t/865061. So my question is the same that the first post link : Doescompany have a solution that writes the entire SREC to a Bq40z80 with minimal operator intervention? Thanks in advance for your help.", + "partNumber" : " BQ40Z80", + "allResponseList" : [ { + "contentId" : "3327570", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 24, 2020 9:29 PM", + "userId" : "3528441", + "content" : "Hello Cyril, We do have a bqTools SDK, but you will need to go through acompany local sales rep." + } ], + "tags" : [ "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2bBQ40Z80", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2bfirmware", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2b%2bplease%2bhelp", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2bplease%2bhelp", "/support/power-management/f/196/tags/bqStudio", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2bflashing", "/support/power-management/f/196/tags/bq40z80" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899993.json b/data/json/DLP/899993.json new file mode 100644 index 0000000000000000000000000000000000000000..0c9555886ee4c2fc767639e99aefab261295fb1b --- /dev/null +++ b/data/json/DLP/899993.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "899993", + "reporterName" : "Michael Gilge", + "rankPoints" : "1500", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS2662: Schematic review", + "rankName" : "Expert", + "replies" : " 2", + "views" : " 14", + "queryText" : "Part Number: TPS2662 Hi, we are having problems getting the below schematic to work robustly. The idea is to have a PoE-PD and divert the 48-56VDC from the PoE switch to a remote sink. So for 802.3at app. 2-3W would be fed into the flyback and converted down to 12V for local supply. The remaining power would be fed from the PoE rail (48-56VDC) via the eFuse to a remote sink. We were hoping the eFuse would switch on only after the PoE switch is supplying the full voltage and also provide power in a controlled way. However, we have already destroyed 3 pieces of TPS26621 just by connecting the load to the output. The destroyed ICs all show an internal closed circuit. Have we overlooked something in the application design? Best regards, Michael", + "partNumber" : " TPS2662", + "allResponseList" : [ { + "contentId" : "3327047", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 1:31 PM", + "userId" : "4743883", + "content" : "Hi Michael, Can you please share the full schematic and system block diagram. If confidential, please send me in private. Are the failures happened during turn-off ? What is the Cout on eFuse? and the type of load you are using for test. Best Regards, Rakesh" + }, { + "contentId" : "3329958", + "userName" : "Rakesh", + "rankPoints" : "39750", + "rankName" : "Mastermind", + "date" : "Apr 28, 2020 6:14 AM", + "userId" : "4743883", + "content" : "Hi Michael, Thanks for sharing the schematic over email. As discussed, please check on the transient voltages on the output side and use TPS26625. Please revert back if there are any followup questions. Best Regards, Rakesh" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS2662" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/899994.json b/data/json/DLP/899994.json new file mode 100644 index 0000000000000000000000000000000000000000..fbc8aab1621208e8cb93c2ec0ac7154394988f0c --- /dev/null +++ b/data/json/DLP/899994.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "899994", + "reporterName" : "user6213604", + "rankPoints" : "60", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UC1846: Circuit configuration for constant voltage control", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 28", + "queryText" : "Part Number: UC1846 Hello. I use the UC1846 to design a push-pull boost up converter with an input voltage of 28V, an output voltage of 500V, and an output current of 1mA to 30mA. I would like to stabilize the output voltage to 500V ± 10V against fluctuations in the output current of 1mA to 30mA. Please tell me the circuit configuration of the error amplifier to satisfy this. Also, please tell me the circuit configuration to apply the current limit (maximum 30mA). Thanking you in advance.", + "partNumber" : " UC1846", + "allResponseList" : [ { + "contentId" : "3330010", + "userName" : "Teng Feng", + "rankPoints" : "9390", + "rankName" : "Genius", + "date" : "Apr 28, 2020 7:08 AM", + "userId" : "5617595", + "content" : "Hello, This is current mode controller, there is a PWM comparator which also provides limit peak-switch primary currents on a pulse-by-pulse current limit control. But if you want to limit the output current, a shutdown circuit is required to provide protection circuitry and remote shutdown functions. A voltage transferred from output current larger than 350-mV applying to shutdown pin can disable the device." + } ], + "tags" : [ "/support/power-management/f/196/tags/UC1846", "/support/power-management/f/196/tags/UC1846%2bconstant%2bvoltage%2bcontrol" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900000.json b/data/json/DLP/900000.json new file mode 100644 index 0000000000000000000000000000000000000000..a859eecd2d3c2311ac24c6c09d5d6f3d61ba8051 --- /dev/null +++ b/data/json/DLP/900000.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "900000", + "reporterName" : "Skandashree A V", + "rankPoints" : "30", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ76PL455A-Q1: BQ76PL455A", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 18", + "queryText" : "Part Number: BQ76PL455A-Q1 Can BQ76PL455A measure voltage below 1 V? Because in section 7.3.3.4 it say it can measure in the range of 1V to 4.95V", + "partNumber" : " BQ76PL455A-Q1", + "allResponseList" : [ { + "contentId" : "3327372", + "userName" : "Taylor Vogt", + "rankPoints" : "6625", + "rankName" : "Expert", + "date" : "Apr 24, 2020 5:28 PM", + "userId" : "4375069", + "content" : "Hi Skandashree, The datasheet is correct, 1V is the min voltage for each cell that was tested to meet accuracy specs. Regards, Taylor" + }, { + "contentId" : "3328600", + "userName" : "Skandashree A V", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 10:50 AM", + "userId" : "5831653", + "content" : "Hi Taylor, But if the cell is giving around 0.5V Can it measure?" + }, { + "contentId" : "3329013", + "userName" : "Taylor Vogt", + "rankPoints" : "6625", + "rankName" : "Expert", + "date" : "Apr 27, 2020 3:27 PM", + "userId" : "4375069", + "content" : "Hi Skandashree, As mentioned we cannot recommend this although it may be possible to get an inaccurate measurement. If you rely on sub 1V then we cannot guarantee datasheet specs and you would also need to ensure you stay above 12V minimum voltage to power IC via VTOP which would be difficult if your cells are going below 1V each. Regards, Taylor" + }, { + "contentId" : "3330027", + "userName" : "Skandashree A V", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 28, 2020 7:25 AM", + "userId" : "5831653", + "content" : "Hi Taylor, Thank you so much for clarifying! Regards, A V Skandashree" + } ], + "tags" : [ "/support/power-management/f/196/tags/_2300_%2bBQ76PL455A", "/support/power-management/f/196/tags/BQ76PL455A", "/support/power-management/f/196/tags/BQ76PL455A_2D00_Q1", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2bADC" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900005.json b/data/json/DLP/900005.json new file mode 100644 index 0000000000000000000000000000000000000000..2dd0e6a42de09c32df7d6e8cdb9d4531fd426da2 --- /dev/null +++ b/data/json/DLP/900005.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900005", + "reporterName" : "Jason Dai", + "rankPoints" : "2790", + "resolutionStatus" : "", + "ticketName" : "LM5019: P2P replace LM5017 for lower Iout requirement?", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 10", + "queryText" : "Part Number: LM5019 Hello E2E, May I have your support to take a look whether customer could directly replace lm5017 by using lm5019 on PMP7383 reference design? Customer only require 3v3/0.1A at isolated channel output and keep 3v3/0.05A at non-isolated channel output. /tool/PMP7383 Sincerely, Jason", + "partNumber" : " LM5019", + "allResponseList" : [ { + "contentId" : "3327284", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 4:14 PM", + "userId" : "1881345", + "content" : "Hello The two devices are very similar. Please consult the data sheet for both devices and also use the calculator tool on the product folder to help with your design. If you have any specific questions, please let us know. Thanks" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM5019", "/support/power-management/f/196/tags/LM5017", "/support/power-management/f/196/tags/PMP7383" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900006.json b/data/json/DLP/900006.json new file mode 100644 index 0000000000000000000000000000000000000000..b6a8388effa2838379f30e55ccba1693267207b0 --- /dev/null +++ b/data/json/DLP/900006.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900006", + "reporterName" : "soun schuller", + "rankPoints" : "20", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS61221: Tina spice model for TPS61221DCKR is crypted", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 14", + "queryText" : "Part Number: TPS61221 Hello, I'm using Tina for simulated my circuit. I taked the spice model oncompany site here: /product/TPS61221/toolssoftware But it seems to be encrypted, some know how to decrypt it. soun", + "partNumber" : " TPS61221", + "allResponseList" : [ { + "contentId" : "3327975", + "userName" : "Minqiu Xie", + "rankPoints" : "12515", + "rankName" : "Genius", + "date" : "Apr 26, 2020 5:23 AM", + "userId" : "5303427", + "content" : "Hi Soun: You could export from Webex to TINA. Here is a guidance I made before. /support/power-management/f/196/p/884700/3271822#3271822" + }, { + "contentId" : "3327998", + "userName" : "soun schuller", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 26, 2020 7:15 AM", + "userId" : "504437", + "content" : "Hi Minqiu, Thank for your reply it's great. I tried it and it's ok . Thank you so much have a good day" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS61221", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2bDC_2F00_DCconverter" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900007.json b/data/json/DLP/900007.json new file mode 100644 index 0000000000000000000000000000000000000000..da766dfb0cd57bceb47076e9c678c2d005d469c2 --- /dev/null +++ b/data/json/DLP/900007.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900007", + "reporterName" : "Michael9q", + "rankPoints" : "190", + "resolutionStatus" : "Resolved", + "ticketName" : "LDC1101: Length of SPI connection for reading and setting registers.", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 18", + "queryText" : "Part Number: LDC1101 Hello there, I would like to ask for recommendation of connection distances of entire sensor system? As recommended in multiple LDC manuals it is best to place capacitor as close as possible to sensor coil. LDC should be also as close as possible to LC circuit. Ideally on the back of the coil. L to C max 1\", LDC to LC max 1\". How far can be place MCU which sets registers and receives data from LDC? SPI runs at 8MHz. I know that SPI is mainly for short distance, the closer the better but would it work reliably with shielded cables even on distance +-3 fl ? Here is the schematics: Thank you. Best Regards, Michael", + "partNumber" : " LDC1101", + "allResponseList" : [ { + "contentId" : "3327220", + "userName" : "Scott Bryson", + "rankPoints" : "505", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 3:41 PM", + "userId" : "1253127", + "content" : "Michael, Thanks for your question. As you point out, higher transmission rates become more difficult at increasing lengths. The maximum distance you can achieve will depend on a number of design factors such as impedance matching and routing techniques to limit coupling with other signals on your PCB. You will want to carefully consider these as you plan your design. Another option would be to insert serial buffers periodically to help limit reflections and maintain signal integrity. You might consider using a device such as SN74AUC125. There are a handful of documents that may prove useful when considering your design that could help limit the need for extra components and give you a bit more guidance what can be achieved when driving SPI signals: Extending the SPI Bus for Long Distance Communication: /lit/an/slyt441/slyt441.pdf Extending SPI and McBSP with Differential Interface Products /lit/an/slla142/slla142.pdf How to Extend an SPI Bus Through a Differential Interface /blogs_/b/analogwire/archive/2015/02/13/extending-spi-with-differential-signaling-technology High Speed Layout Guidelines /lit/an/scaa082a/scaa082a.pdf" + } ], + "tags" : [ "/support/sensors/f/1023/tags/LDC1101EVM", "/support/sensors/f/1023/tags/LDC1101" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900011.json b/data/json/DLP/900011.json new file mode 100644 index 0000000000000000000000000000000000000000..968a5a0f31d63228947b5cf29f0a90a4c99521c7 --- /dev/null +++ b/data/json/DLP/900011.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900011", + "reporterName" : "Stefano Cirelli", + "rankPoints" : "180", + "resolutionStatus" : "Resolved", + "ticketName" : "MMWAVE-SDK: Unit test for drivers SOC and OSAL", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 20", + "queryText" : "Part Number: MMWAVE-SDK Hi @all, I see in the sdk3.3.0.03 that the folder \"test\" inside the drivers SOC and OSAL are not present. Is there a way to test these drivers? Thanks BR, Stefano", + "partNumber" : " MMWAVE-SDK", + "allResponseList" : [ { + "contentId" : "3327162", + "userName" : "Kyle Cousino", + "rankPoints" : "19220", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 3:02 PM", + "userId" : "4381542", + "content" : "Stefano, These drivers are tested within a specific use case context. The following drivers do not include a unit test. The reason they are not included is listed next to each driver. SOC The SOC driver is a collection of bits for influencing device behavior There is no targeted unit test but almost all APIs get tested through the mmWave OOB demo or other drivers OSAL The OSAL driver is tested via all driver unit tests ESM The ESM driver is tested through the watchdog unit test This is the only identified use case of ESM within the SDK context Pinmux The Pinmux driver is tested by all of the peripheral tests and the mmWave OOB demo Regards, Kyle" + } ], + "tags" : [ "/support/sensors/f/1023/tags/MMWAVE_2D00_SDK" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900012.json b/data/json/DLP/900012.json new file mode 100644 index 0000000000000000000000000000000000000000..1e1bf30cd1decc308a23a1f5b11d83d8495affef --- /dev/null +++ b/data/json/DLP/900012.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900012", + "reporterName" : "Walter Hayden", + "rankPoints" : "10", + "resolutionStatus" : "", + "ticketName" : "TPS7H1101A-SP: Part Weight", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: TPS7H1101A-SP Please supply a weight for the TPS7H1101A-SP LDO", + "partNumber" : " TPS7H1101A-SP", + "allResponseList" : [ { + "contentId" : "3327224", + "userName" : "Wade Vonbergen", + "rankPoints" : "56470", + "rankName" : "Guru", + "date" : "Apr 24, 2020 3:45 PM", + "userId" : "8007", + "content" : "Walter, I am researching this, and will get back with you on package weight, or timeline to obtain it. Thanks, Wade" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS7H1101A_2D00_SP" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900015.json b/data/json/DLP/900015.json new file mode 100644 index 0000000000000000000000000000000000000000..fd367321b738a6b2ecf5cfb32e68645b6e13bf5a --- /dev/null +++ b/data/json/DLP/900015.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900015", + "reporterName" : "luke myles", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS2044B: TPS2044BDG4", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 13", + "queryText" : "Part Number: TPS2044B Hello I need the IBIS model for this part please? TPS2044B: TPS2044BDG4", + "partNumber" : " TPS2044B", + "allResponseList" : [ { + "contentId" : "3327933", + "userName" : "Ziv Zhang", + "rankPoints" : "4685", + "rankName" : "Expert", + "date" : "Apr 26, 2020 2:02 AM", + "userId" : "5039499", + "content" : "Hi Sir, Don't have this file. For TI's policy, I will first click resolved button. If you have any other concern, contact me any time. If you think resolved, please help click 'Issue is solved button'. Thanks." + } ], + "tags" : [ "/support/power-management/f/196/tags/tps2044B", "/support/power-management/f/196/tags/IBIS%2bmodel%2bibis%2bMODEL%2bTPS2044B" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900019.json b/data/json/DLP/900019.json new file mode 100644 index 0000000000000000000000000000000000000000..e1566cc1236685ccd18158e82406c379c5ac34c8 --- /dev/null +++ b/data/json/DLP/900019.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900019", + "reporterName" : "luke myles", + "rankPoints" : "20", + "resolutionStatus" : "", + "ticketName" : "TPS22965: IBIS Model?", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 9", + "queryText" : "Part Number: TPS22965 Hello I need the IBIS model for this part please?TPS22965DS thanks", + "partNumber" : " TPS22965", + "allResponseList" : [ { + "contentId" : "3327507", + "userName" : "Andy Robles", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 8:00 PM", + "userId" : "6043129", + "content" : "Hi Luke, Welcome to E2E! IBIS models are created to allow for a quick simulations to see what the output would be for certain inputs. It can be thought of as a set of outputs for given inputs, but it does not model the internal circuitry response of the load switches. Although some devices in our portfolio have IBIS models, an IBIS model for the TPS22965 was not created. The only models available for this device would be the ones found in the product page which would include the TINA-TI and PSPICE models. Best regards, Andy Robles" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS2044BDG4", "/support/power-management/f/196/tags/TPS22965" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900022.json b/data/json/DLP/900022.json new file mode 100644 index 0000000000000000000000000000000000000000..0a47b90353c6118e9d9fc3eededa04df24461029 --- /dev/null +++ b/data/json/DLP/900022.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900022", + "reporterName" : "rahul ps", + "rankPoints" : "10", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TI IWR6843 people counting linux support", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 13", + "queryText" : "HI , i am trying to load people counting binary to the IWR6843ISK board (no problem in loading) ,i have downloaded the INDUSTRIAL_TOOL_BOX_4_2_1 but when i move into the directory labs/people_count/visualizer i am unable to find visualizer exe for linux only windows is preset,if there is a visualizer for linux (apart from demo visualizer) for people counting let me know ,or if there is an alternate way please let me know. Thanking you", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3327280", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 4:12 PM", + "userId" : "5118664", + "content" : "Hi Rahul, The installer only supports Windows. However, you can just run the program using python - python3 gui_main.py. You will have to install some packages, these are listed in setUpEnvironment.bat Regards, Justin" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR6843", "/support/sensors/f/1023/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2bIWR1642BOOST", "/support/sensors/f/1023/tags/IWR6843ISK" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900024.json b/data/json/DLP/900024.json new file mode 100644 index 0000000000000000000000000000000000000000..7d4e1b0d02d5d6e9c1b2e3c3980dcb6fcee50954 --- /dev/null +++ b/data/json/DLP/900024.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900024", + "reporterName" : "analog06", + "rankPoints" : "60", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC28950: how to sımulate ucc28950 for pspıce model", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 34", + "queryText" : "Part Number: UCC28950 hello how to simulate ucc28950 integration in pspice, I tried, but I failed thank you", + "partNumber" : " UCC28950", + "allResponseList" : [ { + "contentId" : "3327238", + "userName" : "Sonal Singh", + "rankPoints" : "5240", + "rankName" : "Expert", + "date" : "Apr 24, 2020 3:52 PM", + "userId" : "4787382", + "content" : "Hello, If you download the Pspice model for the device from thecompany webpage link below, it works alright for me. /product/UCC28950/toolssoftware Regards, Sonal" + }, { + "contentId" : "3327303", + "userName" : "analog06", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 4:30 PM", + "userId" : "6178086", + "content" : "hello, I downloaded it and I've been trying to simulate it for a few days and I don't know the library and I can't solve this error I'm looking for a document describing how to include the library in pspice or your suggestion ?" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC28950" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900030.json b/data/json/DLP/900030.json new file mode 100644 index 0000000000000000000000000000000000000000..b7e6d62e2f1c3d09a93940fcbf2ecc50bfb56194 --- /dev/null +++ b/data/json/DLP/900030.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900030", + "reporterName" : "robert hoff", + "rankPoints" : "200", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "AWR2243: Cascade Data Valid Signal", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 20", + "queryText" : "Part Number: AWR2243 Hello, We are trying to capture data from the AWR2243 Cascade board over LVDS instead of the default CSI interface. We have the data lines hooked up to an external FPGA board, but are still using the stockcompany board and LUA scripts for setup. Once we have the board set up, we change the data mode to LVDS using the GUI. We are not seeing the Data Valid line toggle. We ran the same test with the AWR2243Boost board, and were able to use the Data Valid line as a trigger for data capture. Is there a reason that the cascade system when in LVDS mode would not trigger this Data Valid line? Is there another signal we can configure to trigger data capture? Thanks, Rob", + "partNumber" : " AWR2243", + "allResponseList" : [ { + "contentId" : "3329534", + "userName" : "Randy Rosales", + "rankPoints" : "5580", + "rankName" : "Expert", + "date" : "Apr 27, 2020 9:32 PM", + "userId" : "1068709", + "content" : "Hi Robert, For options like the LVDS/CSI2 lane configuration, I believe these can only be configured once without a device reset. At least that is my experience with the lua API/mmWave Studio and these options. In my normal usage of our single-device and cascaded EVM, I typically limit reconfiguration or looping of parameters only to the SensorConfig tab options (chirp profiles, chirp configs, frame config). I would also recommend modifying the setup script to select the exact options you need. The lines to modify for the ADC datapath are below. There are a few general ways we typically use in mmWave Studio to figure out the exact API options we want when setting up a new script: The lua API generally follows the actual AWRx ICD SPI API command set – so usually the functions and commands are similar You can look-up the full lua API parameter set from within mmWave Studio by using the Lua Shell and typing help and then the command. For example: You can also use the GUI selection and then read off the Output log window to find the function and parameters you need. For example clicking the Set button in the Data Path Configuration pane of the DataConfig tab results in the following API command being executed. Please let me know if that helps." + } ], + "tags" : [ "/support/sensors/f/1023/tags/AWR2243", "/support/sensors/f/1023/tags/AWR2243BOOST" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900035.json b/data/json/DLP/900035.json new file mode 100644 index 0000000000000000000000000000000000000000..20de7757b468fb875881930740645ff196b70fdd --- /dev/null +++ b/data/json/DLP/900035.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900035", + "reporterName" : "Delia Brick", + "rankPoints" : "10", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "DLP2010: Small, bright projector system with short throw ratio", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 32", + "queryText" : "Part Number: DLP2010 Hello, could you recommend a complete projector system with a throw ratio around 1, and bright enough to use it in a bright environment? what would be the smallest possible option? Thank you very much for your help", + "partNumber" : " DLP2010", + "allResponseList" : [ { + "contentId" : "3327381", + "userName" : "Vivek Thakur", + "rankPoints" : "9880", + "rankName" : "Genius", + "date" : "Apr 24, 2020 5:44 PM", + "userId" : "9052", + "content" : "Hello Delia, Welcome to DLP forum and thank you for your interest in DLP technology. I would like to suggest that you review the application notes on \"TI DLP® System Design: Brightness Requirements and Tradeoffs\" /lit/an/dlpa068b/dlpa068b.pdf?ts=1587746857718 This will help you finalize the specification of the projector which best meets your requirement considering image size & ambient environment etc. You may also want to visit website of some of Pico projector manufacturer to explore the DLP pico projector which best meets your requirement. Few of such manufactures are: https://miroirusa.com/ https://www.aaxatech.com/products/consumer.htm The projector central website also has list and reviews of the DLP pico projectors available in the market regards, Vivek." + } ], + "tags" : [ "/support/dlp/f/94/tags/DLP2010" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900041.json b/data/json/DLP/900041.json new file mode 100644 index 0000000000000000000000000000000000000000..9a322bbd63db04df31d00df209904e3302c64712 --- /dev/null +++ b/data/json/DLP/900041.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900041", + "reporterName" : "Ross Johnson", + "rankPoints" : "160", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ27520-G4: Unable to set a design capacity above 15400 mAh", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 30", + "queryText" : "Part Number: BQ27520-G4 Hello, We have recently decided to increase the battery pack size of one of our products, using 21700 cells. The new design capacity should be 19600 mAh. I am not able to get Gauge Studio to accept a capacity above 15400 mAh. I notice that when the datasheet was revised to B, one of the changes was to reduce the capacity to 14500 mAh. However, 32Ah still appears widely in the datasheet and indeed on the product page of TI's web site. So I'm not clear if this is a bug in Gauge Studio, or am I hitting a poorly documented limit of the part. Any advice would be greatly appreciated. Just out of curiosity, if I were to set the design capacity to 15400, how would that affect the behavior of the gauging? Would it even pass a learn cycle? Thanks, Ross", + "partNumber" : " BQ27520-G4", + "allResponseList" : [ { + "contentId" : "3327567", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 24, 2020 9:28 PM", + "userId" : "3528441", + "content" : "Hello Ross, I don't recommend going above 15400 mAh, that will cause the energy calculations to over flow potentially. I would say you can try to calibrate the sense resistor such that 2 A = 1 A reported. that will apply 1/2 scale. You will need to scale taper current, qmax, design capacity, any mAh measures to 1/2 as well. Thanks" + }, { + "contentId" : "3327660", + "userName" : "Ross Johnson", + "rankPoints" : "160", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 11:09 PM", + "userId" : "1240238", + "content" : "Thanks Kang for the suggestion. Is this something you are aware has been done by someone else previously? I assume when you list those parameters above you simply mean that ALL current (mA) settings and results will need to be scaled? What about power (mW/cW) settings and results? I operate the gauge in 'current load' mode and don't use any of the 'power' related results. Can I safely ignore these? Cheers, Ross" + }, { + "contentId" : "3328068", + "userName" : "Ross Johnson", + "rankPoints" : "160", + "rankName" : "Prodigy", + "date" : "Apr 26, 2020 11:48 AM", + "userId" : "1240238", + "content" : "Hi Kang, I found the Application Report (SLUA760) \"bq34z100-G1 High Cell Count and High Capacity Applications\" which gives a pretty good run down on the subject of scaling for large packs. I also found Application Report (SLUA792) \"Enhanced Resolution Gauging for Low Current Applications Using Scaling\" which addresses the same thing but for the opposite reason (i.e. small packs). I'm running a learning cycle now so fingers crossed! /Ross" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ27520_2D00_G4" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900043.json b/data/json/DLP/900043.json new file mode 100644 index 0000000000000000000000000000000000000000..bdb82d36e818312fa49b19af8dce01d5e96dc508 --- /dev/null +++ b/data/json/DLP/900043.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900043", + "reporterName" : "Shraddha", + "rankPoints" : "100", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "IWR6843ISK-ODS: Unable to parse TLV's from UART Data for 3D People Counting Demo", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 25", + "queryText" : "Part Number: IWR6843ISK-ODS Hicompany Team, We have written one c application which reads data coming from device and parse the TLV's. We are using IWR6843ISK-ODS antenna and Sense and Direct HVAC control demo. Our application is able to parse the TLV's for Sense and Direct HVAC Control Demo with the same antenna. We tried to modify the application for 3D people counting demo but everytime the header comparison is getting failed so we are not able to parse the TLV's for it. Following is the snippet for reading data coming from UART , parsing the header and comparing it with expected Header. uint16_t magic[4] = {0x0102,0x0304, 0x0506, 0x0708}; // expected Header while (1) { memset(&newdata, 0 , sizeof(dataPacket_t)); memset(buff, 0, sizeof(buff)); readBytes = read(g_mmw.datacom_fd, &buff, 1500); if (memcmp(buff, magic, 8) == 0) { // when expected header received in data memset(header, 0, HEADERLEN); memcpy(header, buff, HEADERLEN); while (readBytes < (header->totalPacketLen)) { bufPos = readBytes; numPendBytes = header->totalPacketLen - readBytes; memset(tmpbuf, 0, sizeof(tmpbuf)); tempBytes = read(g_mmw.datacom_fd, &tmpbuf, numPendBytes); readBytes += tempBytes; memcpy((buff+bufPos), tmpbuf,tempBytes); } } else { continue; } May i learn any difference in header format for Sense_and_Direct_HVAC Control and 3D People Counting Demo? Could you please assist regarding this ? Thanks Shraddha", + "partNumber" : " IWR6843ISK-ODS", + "allResponseList" : [ { + "contentId" : "3327278", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 4:10 PM", + "userId" : "5118664", + "content" : "Hi Shradda, Please see the file in the visualizer source - oob_parser.py. This file contains code that parses the header of both the 3D People Counting demo, and the HVAC demo. You can see the differences in parsing there. Regards, Justin" + }, { + "contentId" : "3328347", + "userName" : "Shraddha", + "rankPoints" : "100", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 6:20 AM", + "userId" : "6321932", + "content" : "Hi Justin, We checked the oob_parser.py file, there is no difference in the magic comparison, only the difference with header members (in sequence), we have modified the header format accordingly and checked. We observed that the baudrate for data COM port is different for 3D-people counting Demo , we modified it accordingly and checked. cfsetispeed(&SerialPortSettings,921600*2); cfsetospeed(&SerialPortSettings,921600*2); But still magic comparison is failing always, so it is not able to parse any TLV's. please find the magic comparison snippet as shown : char buff[1500] = {0}; uint16_t magic[4] = {0x0102,0x0304, 0x0506, 0x0708}; while (1) { memset(buff, 0, sizeof(buff)); readBytes = read(g_mmw.datacom_fd, &buff, 1500); i = 0; while (i < readBytes) { if (memcmp(buff+i, magic, 8) == 0) { printf(\"Magic Found i = %d\\n\", i); printf(\" %hx %hx %hx %hx %x %x\\n\", *(buff+i), *(buff+i+2), *(buff+i+4), *(buff+i+6), *(buff+i+10), *(buff+i+14)); break; } i++; } } we are able to observe the readbytes, but magic comparison is always failing. Could you please assist us regarding this issue ? Thanks Shraddha" + }, { + "contentId" : "3328980", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 3:13 PM", + "userId" : "5118664", + "content" : "Hi Shradda, Because thecompany device is Little Endian, the Magic word will be output as: x0201 x0403 x0605 x0807 I noticed you have a printf statement in you source, what does this show when you see the magic word? Regards, Justin" + } ], + "tags" : [ "/support/sensors/f/1023/tags/_2300_%2b%2b%2b%2b%2b%2bUART", "/support/sensors/f/1023/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2bplease%2bhelp", "/support/sensors/f/1023/tags/IWR6843ISK_2D00_ODS", "/support/sensors/f/1023/tags/_2300_%2b%2b%2b%2b%2bIWR6843", "/support/sensors/f/1023/tags/_2300_%2b%2b%2b%2b_2300_%2b%2bIWR6843ISK" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900046.json b/data/json/DLP/900046.json new file mode 100644 index 0000000000000000000000000000000000000000..e5a1075dbb96fce9d8f1a95afe6be84c9bac2a72 --- /dev/null +++ b/data/json/DLP/900046.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900046", + "reporterName" : "Jeyaprakash K", + "rankPoints" : "140", + "resolutionStatus" : "Resolved", + "ticketName" : "UCC25705: Switching Frequency", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 27", + "queryText" : "Part Number: UCC25705 Hi, I want to operate my buck converter at 100KHz with UCC25705 PWM controller. Is this possible? I came across UCC35075 is used one of the evaluation board at 500KHz switching frequency. Hence, I hope UCC25705 also can be used at 100KHz. Can you please confirm? Thanks, Jeyaprakash K", + "partNumber" : " UCC25705", + "allResponseList" : [ { + "contentId" : "3327191", + "userName" : "Sonal Singh", + "rankPoints" : "5240", + "rankName" : "Expert", + "date" : "Apr 24, 2020 3:27 PM", + "userId" : "4787382", + "content" : "Hello Jeyaprakash, You can use the UCC25705 in a 100kHz design, please use the calculator tool provided below to cross-check your values: Regards, Sonal" + }, { + "contentId" : "3327820", + "userName" : "Jeyaprakash K", + "rankPoints" : "140", + "rankName" : "Prodigy", + "date" : "Apr 25, 2020 10:08 AM", + "userId" : "5119442", + "content" : "Thanks Sonal for your prompt response!" + }, { + "contentId" : "3327921", + "userName" : "senthil kumar92", + "rankPoints" : "10", + "rankName" : "Prodigy", + "date" : "Apr 26, 2020 1:22 AM", + "userId" : "5092974", + "content" : "hi, just for clarification, then why data sheet specifies only in the region between 0.9Mhz to 1Mhz." + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC25705" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900048.json b/data/json/DLP/900048.json new file mode 100644 index 0000000000000000000000000000000000000000..7d7c7ecb0440411f99f461df77c977e632bf8f48 --- /dev/null +++ b/data/json/DLP/900048.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900048", + "reporterName" : "Nishanth Muthusamy", + "rankPoints" : "100", + "resolutionStatus" : "", + "ticketName" : "BQ4050 Cell Balancing and BQ25703 Battery Charger Schematic Review request", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 18", + "queryText" : "Dear Team, We are using Cell Balancer IC: BQ4050RSMR and Battery charger IC: BQ25703ARSNT. We have followed the EVK reference schematics in our design, But we are using 2S Lithium Batteries (Battery Part: 18650). So we would like to request you to review our schematics and finalize our design. Please consider our request and do the needful. Also to start with the board bring up what are the necessary programmers to buy and methods to follow while doing the firmware flash. Thank you and please help us in this regard. Let us know if you need any further information. Awaiting early response. Regards, NishanthBattery Charger & Cell Balancer.pdf", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3327641", + "userName" : "Damian Lewis", + "rankPoints" : "33210", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 10:34 PM", + "userId" : "69960", + "content" : "We will have someone take a look at your schematic and get back to you next week." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ4050" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900049.json b/data/json/DLP/900049.json new file mode 100644 index 0000000000000000000000000000000000000000..2989c32694f1f20ed65deb922b4c9528e0a61871 --- /dev/null +++ b/data/json/DLP/900049.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "900049", + "reporterName" : "Viktorija Cecil", + "rankPoints" : "15585", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS62132: Is 2012 Errata still applicable?", + "rankName" : "Genius", + "replies" : " 4", + "views" : " 22", + "queryText" : "Part Number: TPS62132 Team, Is 2012 errata still applicable for this device family? I see the PCN showing die change to rev F, does that mean all errata items were resolved? Customer is looking to reuse this part on a new design, and would like a confirmation. If you would like to recommend an alternative as well, please let me know. TPS6213x D2 Errata Sept7.pdf Thanks Viktorija", + "partNumber" : " TPS62132", + "allResponseList" : [ { + "contentId" : "3327581", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Apr 24, 2020 9:40 PM", + "userId" : "24596", + "content" : "Viktorija, We did not support theses parts until last year. Since the die revision is now F, I suspect it has all the fixes, but I will have to research it. The support person for TPS62132 is out with COVID19. I am backing him up temporarily, but I have quite a bit in my queue so it may be mid/late next week before I can find out for sure." + }, { + "contentId" : "3328778", + "userName" : "Viktorija Cecil", + "rankPoints" : "15585", + "rankName" : "Genius", + "date" : "Apr 27, 2020 1:26 PM", + "userId" : "643353", + "content" : "Thanks, John." + }, { + "contentId" : "3329002", + "userName" : "JohnTucker", + "rankPoints" : "189830", + "rankName" : "Guru", + "date" : "Apr 27, 2020 3:24 PM", + "userId" : "24596", + "content" : "Viktorija, So far as we know all those issues plus some others have been fixed for several years now." + }, { + "contentId" : "3329486", + "userName" : "Viktorija Cecil", + "rankPoints" : "15585", + "rankName" : "Genius", + "date" : "Apr 27, 2020 8:51 PM", + "userId" : "643353", + "content" : "Thanks, John." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS62132" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900050.json b/data/json/DLP/900050.json new file mode 100644 index 0000000000000000000000000000000000000000..a64cd319ff66141cde884930378c53c5efad68f8 --- /dev/null +++ b/data/json/DLP/900050.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900050", + "reporterName" : "Matthew Force104227", + "rankPoints" : "110", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ24195: VSYS / PMID Operation", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 17", + "queryText" : "Part Number: BQ24195 I have a fundamental question about operation that I was not able to glean from the datasheet. I want to understand the relationship to VSYS and PMID for the 4 following cases: 1) If powered from 5V on VBUS and VBAT = 3.8V: PMID = 5V (follows VBUS) and VSYS = ~3.8V (follows battery) 2) If powered from 5V on VBUS and VBAT = 3.0V: PMID = 5V (follows VBUS) and VSYS = ~3.5V (boost to Vsys_min) 3) If VBUS is not present and VBAT = 3.8V: PMID = 5.1V (boost) and VSYS = ~3.8V (follows battery) 4) If VBUS is not present and VBAT = 3.0V: PMID = 5.1V (boost) and VSYS = ??? (does it follow the battery or maintain the 3.5V Vsys_min) If case 4), can the device boost both PMID and VSYS from a battery below Vsys_min?", + "partNumber" : " BQ24195", + "allResponseList" : [ { + "contentId" : "3327711", + "userName" : "Ning T", + "rankPoints" : "15365", + "rankName" : "Genius", + "date" : "Apr 25, 2020 12:53 AM", + "userId" : "145100", + "content" : "Hi, 1) Yes if VBAT > the minimum system voltage setting. 2) VSYS should be the minimum system voltage setting +150mV. 3) Yes. 4) VSYS still follows VBAT. In boost mode, VBAT (VSYS as well) is the input and PMID is the output. VBAT needs to be above BATLOWV threshold (VBATLOWV set by REG04[1]) in order to support boost mode. If only battery is present and the voltage is above depletion threshold (VBAT_DEPL), the BATFET turns on and connects battery to system, then VSYS follows VBAT. It is highly recommended to get familiar with the BQ24195 charger operation by evaluating the BQ24195 EVM before working on your own design. Thanks, Ning." + } ], + "tags" : [ "/support/power-management/f/196/tags/bq24195" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900052.json b/data/json/DLP/900052.json new file mode 100644 index 0000000000000000000000000000000000000000..83161527cc941355ecfa1ce525acb4748db1c6bb --- /dev/null +++ b/data/json/DLP/900052.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900052", + "reporterName" : "Marc Derrien", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "DLP3010: Frustrated TIR", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 56", + "queryText" : "Part Number: DLP3010 In paragraph 3.1.6 of the document DLPA022.pdf you indicate a problem concerning the frustated-TIR. Can you give me how you get to calculate this parameter and get the curve in figure 8? I know that the frustrated TIR is due to evanscent wave and the very thin air thickness between the two prisms. Then an R-TIR prism should not pose this kind of problem since one can introduce a greater air thickness? What is the minimum thickness to avoid this kind of problem in the case of a TIR prism? In order to obtain the best possible contrast which prism is the best? TIR prism or R-TIR prism? Marc", + "partNumber" : " DLP3010", + "allResponseList" : [ { + "contentId" : "3327389", + "userName" : "Vivek Thakur", + "rankPoints" : "9880", + "rankName" : "Genius", + "date" : "Apr 24, 2020 5:49 PM", + "userId" : "9052", + "content" : "Hello Marc, Welcome to DLP forum and thank you for your interest in DLP technology. I will follow-up with our optical expert and get back to you on this. regards, Vivek" + }, { + "contentId" : "3328135", + "userName" : "Vivek Thakur", + "rankPoints" : "9880", + "rankName" : "Genius", + "date" : "Apr 26, 2020 6:43 PM", + "userId" : "9052", + "content" : "Hello Marc, Your observation is correct . The frustrated TIR effect is due to evanescent wave in the thin air gap. The RTIR does not pose the same kind of problem, for two reasons. 1. There is still an evanescent wave at the critical angle in the RTIR prism, but there is no air gap to another element at that surface, so there is no “leakage” of the evanescent wave back into the optical path. 2. The air gap in the RTIR prism is in the illumination path, and both surfaces of the gap are in transmission, not TIR. So, there is no evanescent wave issue at any thickness of air gap in the RTIR design. The thickness can be relatively large, even up to 1mm or so, and therefore the two prisms do not have to be cemented together in close alignment. This eliminates a costly assembly process relative to the TIR prism. The minimum air thickness in a TIR prism is really just a manufacturing issue; some manufacturers can supply prisms with an air gap down to 5 micron reliably. I could not find reference on how to “calculate” the evanescent effect, but I am sure it is well described in a textbook somewhere. The point is that it will be there, unavoidably, because the air gap in a TIR prism has to be very thin in order to prevent astigmatic distortion in the projected image. The smaller the pixel, the smaller the gap has to be to avoid significant MTF degradation due to astigmatism from the air gap. That is one advantage of the RTIR prism in that there is no air gap in the projection path, unlike the TIR prism. Not only that, but the air gap in a RTIR configuration does not cause any evanescent wave issues. Any image distortion issues due to the air gap in a RTIR configuration are in the illumination path, not projection path, so the effects of the distortion are orders of magnitude less evident or critical in the illumination path. When done well, there is little difference in the contrast achievable with either prism type. In both cases, extra attention must be paid to getting the OFF-state light out of the prism without secondary reflections or scattering off prism surfaces or edges that can get back into the projection pupil. Prism edges are notorious scattering surfaces that will essentially become new lambertian light sources when illuminated by OFF-state light. There are more challenges in managing the OFF-state light and the many possible secondary reflections it may have in the prism as well as in the optical engine mechanics for a RTIR prism vs. a TIR prism, but it can be done. regards, Vivek" + }, { + "contentId" : "3328542", + "userName" : "Marc Derrien", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 9:28 AM", + "userId" : "6332064", + "content" : "Hello Vivek, Thank you for your quick reply. To limit the stray light would it not be appropriate to use absorbent paints on the non-useful faces of the prism which can be in addition to grind surfaces to increase the absorption area.Do you have references of such paintings? I have another question regarding the DLP3010 : on page 18 of the datasheet in paragraph 6.11, I don't understand what the tilt angle error of +/- 1.4 ° corresponds to? Finally, can you tell me where I can find the 3D files (STEP or IGES) of the DLP3010? The exact shape and position of the opening (detail F and G in the package option addendum of the technical sheet) could be useful, as well as its size to add my optical illumination and projection system with sufficient space between the components Regards, Marc" + } ], + "tags" : [ "/support/dlp/f/94/tags/TIR%2bR_2D00_TIR%2bprism", "/support/dlp/f/94/tags/DLP3010" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900055.json b/data/json/DLP/900055.json new file mode 100644 index 0000000000000000000000000000000000000000..d7edaf4c6ee3cb8ecdc1ab483d822ecc44ecde5f --- /dev/null +++ b/data/json/DLP/900055.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900055", + "reporterName" : "Renan Santos Adriano", + "rankPoints" : "2795", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM5122: External VCC bias Supply", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 11", + "queryText" : "Part Number: LM5122 Hi Team, The customer would like to know if he still needs to connect the VIN when using external VCC bias? isn't external VCC bias sufficient for operation? Figure 19 on page 17 for example, there is an external VCC supply, but the pin \"VIN\" is connected to the voltage \"VIN\". Why is VIN also needed, isn't VCC sufficient for operation? Checking the Functional Block Diagram on page 14 there is only the regulator connected to VIN. Thank in advance. Regards, Renan", + "partNumber" : " LM5122", + "allResponseList" : [ { + "contentId" : "3327744", + "userName" : "Richard Fu22", + "rankPoints" : "2925", + "rankName" : "Intellectual", + "date" : "Apr 25, 2020 3:17 AM", + "userId" : "5003147", + "content" : "Hi Renan, If VCC supply is between 9V to 14V, then the internal regulator is disabled. Therefore, VIN is not needed here. However, during start-up, depending on how the customer sets up their system, the VCC external supply may not be there. VCC will need a way to generate the needed voltage, hence VIN as an input to the regulator. Thanks, Richard" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM5122" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900056.json b/data/json/DLP/900056.json new file mode 100644 index 0000000000000000000000000000000000000000..008b123822d6ddb61af696f1c91378eae48c7dff --- /dev/null +++ b/data/json/DLP/900056.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900056", + "reporterName" : "Adrian Ymeraj", + "rankPoints" : "3490", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM5121: recommended boost", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 15", + "queryText" : "Part Number: LM5121 Hello team, for a new project I'm looking for a boost powered by a battery, specs are Vin=14V, Vout=24V P=90W and I noticed the LM5121 and the 5122 without disconnection switch. Would there be a multi-phase controller (I would like to make my converter with 2 phases) that also manages synchronous rectification (therefore with integrated boostrap)? Even one without synchronous rectification could work for me. I would prefer to have a controller with integrated peak current mode. Please let me know what your suggestions are. Thanks and best regards, Adrian", + "partNumber" : " LM5121", + "allResponseList" : [ { + "contentId" : "3327739", + "userName" : "Richard Fu22", + "rankPoints" : "2925", + "rankName" : "Intellectual", + "date" : "Apr 25, 2020 3:00 AM", + "userId" : "5003147", + "content" : "Hi Adrian, The 5122 is a synchronous controller and can implement dual-phase interleaved boost. It also utilizes peak current mode control. Please see section 8.1.3 of LM5122 datasheet for interleaved operation. This reference design (/tool/PMP9309) may be a starting point for your application. Keep in mind that you do not need to have the op-amp circuit as noted in the design. Thanks, Richard" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM5121" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900058.json b/data/json/DLP/900058.json new file mode 100644 index 0000000000000000000000000000000000000000..4e718074ca9ed21d8fdffb54164d4722d0449c32 --- /dev/null +++ b/data/json/DLP/900058.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900058", + "reporterName" : "Jeff Krupp", + "rankPoints" : "10", + "resolutionStatus" : "Resolved", + "ticketName" : "UCC2800: Error amplifier current limit range - 0.9V to 1.1V?", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 11", + "queryText" : "Part Number: UCC2800 Hello. I see the CS pin has a range of 0.9V to 1.1V range for current limiting operation, but this amounts to a large range of load current in the end product. Am I missing something? If not, is there a tighter tolerance chip that would limit the range better? Thanks.", + "partNumber" : " UCC2800", + "allResponseList" : [ { + "contentId" : "3327267", + "userName" : "Sonal Singh", + "rankPoints" : "5240", + "rankName" : "Expert", + "date" : "Apr 24, 2020 4:05 PM", + "userId" : "4787382", + "content" : "Hello Jeff, The maximum amplitude of the CS pin is 1V; at this voltage the controller will start current limiting. The 0.9V and 1.1V are the values including factors like: the -55deg to 125deg spread of temperature, unit to unit variation, some hysteresis on the internal comparator etc. I hope this answer your question. Regards, Sonal" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC2800" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900063.json b/data/json/DLP/900063.json new file mode 100644 index 0000000000000000000000000000000000000000..84adb8562c488049c8ec7542c6a8c11148e743d9 --- /dev/null +++ b/data/json/DLP/900063.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "900063", + "reporterName" : "Alex K16", + "rankPoints" : "160", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ24620: ISET Voltage Jump", + "rankName" : "Prodigy", + "replies" : " 6", + "views" : " 27", + "queryText" : "Part Number: BQ24620 Hi, We have a BQ24620 board design that closely follows thecompany demo board. We are setting the charge current to 1.25A and the voltage to 14.4V. During testing we are getting some strange results on the ISET pin. As long as the R18 is below 7KOhms, all works exactly as expected. At or above 7KOhms ISET voltage makes a sudden jump: R18=5KOhms, V=0.16V R18=6KOhms, V=0.19V R18=7KOhms, V=0.35V R18=8KOhms, V=0.38V R18=9KOhms, V=0.41V R18=10KOhms, V=0.43V R18=18KOhms, V=0.60V Our R21 is set to 100KOhms and our sense resistor is set to 0.01 Ohms. Thanks, Alex", + "partNumber" : " BQ24620", + "allResponseList" : [ { + "contentId" : "3327269", + "userName" : "Kedar Manishankar", + "rankPoints" : "9290", + "rankName" : "Genius", + "date" : "Apr 24, 2020 4:06 PM", + "userId" : "4996925", + "content" : "Hi Alex, I am a little confused what you mean by ISET voltage jumps. This voltage is sourced externally by the user, through the use of an external voltage source, or to use a resistor divider from an available rail like VREF. The main point is that this is set externally by the user. The only issue you would run into is if you try to source more than 2V, as that is the max voltage that can be applied to this pin, but you are not exceeding this. From your measured values, the resistor divider is giving incorrect results for R18 = 7k and above. (5k and 6k are correct). To verify if the BQ24620 is operating correctly, we can check the measured charge current, according to what voltage is being sourced on VISET (can also use an external voltage on this pin to make testing easier.) For above results, also log the measured VREF. If there is an issue with charge current based on sourced VISET, or the VREF value then we can debug as this would be an issue with BQ24620. However if above is all valid, and the voltage from the voltage divider is incorrect, then this is a board issue not related to BQ24620 performance." + }, { + "contentId" : "3327387", + "userName" : "Alex K16", + "rankPoints" : "160", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 5:47 PM", + "userId" : "4537710", + "content" : "Hi Kedar, Here is the new testing data: R18=6KOhms, VISET=0.19V, VREF=3.3V, Current=0.9A R18=8KOhms, VISET=0.38V, VREF=3.3V, Current=2.2A R18=10KOhms, VISET=0.44V, VREF=3.3V, Current=2.3A R18=14KOhms, VISET=0.49V, VREF=3.3V, Current=1.6A R18=18KOhms, VISET=0.60V, VREF=3.3V, Current=2.2A What do you think? Alex" + }, { + "contentId" : "3327446", + "userName" : "Kedar Manishankar", + "rankPoints" : "9290", + "rankName" : "Genius", + "date" : "Apr 24, 2020 6:36 PM", + "userId" : "4996925", + "content" : "Hi Alex, Your measured results are interesting, as the charge current does not correlate even to what ISET voltage you are measuring. I suspect something regarding layout. Are you able to share your layout and schematic with me regarding the BQ24620 portion of your system with me so I can review and take a quick look? I have sent you a friend request through which you can share it privately." + }, { + "contentId" : "3327458", + "userName" : "Alex K16", + "rankPoints" : "160", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 6:52 PM", + "userId" : "4537710", + "content" : "Hi Kedar, Here is the photo of the board. Thanks, Alex" + }, { + "contentId" : "3328133", + "userName" : "Alex K16", + "rankPoints" : "160", + "rankName" : "Prodigy", + "date" : "Apr 26, 2020 6:29 PM", + "userId" : "4537710", + "content" : "Hi Kedar I did some more testing and have some more data. The original observation of the strange change in the board functions looks like was caused by the mode change from non-synchronous to the synchronous. Here are the gate signals for the HI and LOW FETs in the non-synchronous mode (taken separately): Later, I also changed the sense resistor from 0.01Ohms to 0.05Ohms, limiting the maximum current to 2 Amps, but also boosting the resolution. I took some readings in the synchronous mode. The LOW FET gate signal was 0V all the time in this mode (no PWM). Here is the gate signal for the HI FETs in the synchronous mode with 0.05Ohm sense resistor, 84K-100K divider configuration and the VISET at 1.5V: With the divider at 40K-100K, VISET at 0.94V and the 0.05Ohm sense resistor the HIGH FET gate looks like this: I will provide more data tomorrow. Thanks, Alex" + }, { + "contentId" : "3329056", + "userName" : "Alex K16", + "rankPoints" : "160", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 3:48 PM", + "userId" : "4537710", + "content" : "Hi Kedar, Here are some additional observations. The first image below is showing the HI (yellow) and LOW (green) FET gate signals. The second image is showing the BTST (yellow) and PH (green) signals. What I do not yet understand, if the LO FET never opens, how does the PH go to 0V on every PWM cycle and how does the capacitor keep 6V? Thanks, Alex" + } ], + "tags" : [ "/support/power-management/f/196/tags/bq24620" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900064.json b/data/json/DLP/900064.json new file mode 100644 index 0000000000000000000000000000000000000000..fe49f314d0825763fc5d245fa6c7f29b100c2041 --- /dev/null +++ b/data/json/DLP/900064.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900064", + "reporterName" : "Renan Santos Adriano", + "rankPoints" : "2795", + "resolutionStatus" : "", + "ticketName" : "TPS25924: Current limiting setting vary over temperature", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 18", + "queryText" : "Part Number: TPS25924 Hi Team, My Customer created a set-up to test the current limit over temperature for TPS259241 and TPS25921A. Using TPS259241 and TPS25921A efuse's and the datasheet circuit configuration. The TPS259241 current limit, which is set to 2.5A, is varying a lot over temperature. While this behavior is not present with the TPS25921A Can you explain why or make suggestions to improve this? Regards, Renan", + "partNumber" : " TPS25924", + "allResponseList" : [ { + "contentId" : "3327285", + "userName" : "Praveen GD", + "rankPoints" : "9575", + "rankName" : "Genius", + "date" : "Apr 24, 2020 4:15 PM", + "userId" : "4421098", + "content" : "Hi Renan, The current limit variation specified in the datasheet is guaranteed across temperature, process and voltage. Can you share the customer schematic and details about test setup." + }, { + "contentId" : "3328396", + "userName" : "Renan Santos Adriano", + "rankPoints" : "2795", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 7:02 AM", + "userId" : "5915270", + "content" : "Hello Praveen, Thank you for your response. My customer provided this information: Temperature are measured with a thermocouple glued to the top of the package. The temperature of both rapidly rises to 100- 110C during current limiting Voltage is 5.8V and he is using an electronic load to vary the current and a lab power supply for the voltage source. The circuit was taken directly from our datasheet. Regards, Renan" + }, { + "contentId" : "3328864", + "userName" : "Praveen GD", + "rankPoints" : "9575", + "rankName" : "Genius", + "date" : "Apr 27, 2020 2:11 PM", + "userId" : "4421098", + "content" : "Hi Renan, It is not recommended to use electronic load for testing efuse current limit functionality. Always use resistive loads to evaluate eFuse devices. With resistive loads, the output operating point will be decided by the eFuse in current limit mode of operation. In case of active loads (e-load), the output voltage & current will be decided by both the e-load characteristics and eFuse characteristics in current limit mode. So, load current cannot be limited by the set current limit of the eFuse. You will observation different current than the current limit value. Alternate explanation: When the eFuse device reaches current limit, the device acts as a current source. If an electronic load is used for testing in CC mode, which turns out to be placing two current sources in series in the network. When the electronic CC load exceeds set current limit of eFuse device, the electronic load tries to pull down the output voltage and shifts the operating current other than the current limit value." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS25921A", "/support/power-management/f/196/tags/TPS25924" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900076.json b/data/json/DLP/900076.json new file mode 100644 index 0000000000000000000000000000000000000000..0dbe9e17b98342dac66b7b6ab2e0af6433356877 --- /dev/null +++ b/data/json/DLP/900076.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900076", + "reporterName" : "Edward Lee", + "rankPoints" : "840", + "resolutionStatus" : "", + "ticketName" : "TPS51225C: The output voltage increase with temperature", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 25", + "queryText" : "Part Number: TPS51225C Hi Sir, My customer recently encountered a problem with TPS51225C (generating 3.3V and 5V from 12V). The output voltage increases about 0.8~1V as the temperature rises from 25 degree to 60 degree. They have checked the following items but found nothing anomaly. 1. The voltage level at VFB1 and VFB2 - > Stable and no deviation 2. The voltage at VIN of IC and synchronous mosfet -> Stable 3. The phases at SW1 and SW2 -> Stable and no obvious jitters as temperature rises. 4. The voltage at VREG3 and VREG5 -> As the output voltage increases with temperature, the voltage at VREG5 rises too (switchover) while the voltage at VREG3 does not change too much (about 3.4V) It would be kind of you to give us some directions. Thanks Sincerely, Edward", + "partNumber" : " TPS51225C", + "allResponseList" : [ { + "contentId" : "3327525", + "userName" : "Gerold Dhanabalan - Online Design Tools", + "rankPoints" : "8770", + "rankName" : "Expert", + "date" : "Apr 24, 2020 8:29 PM", + "userId" : "1132529", + "content" : "Hi Edward, What is the temperature grade of the feedback resistors used? If the feed resistors change too much, then Vout will also change but you will not see anything change with Vfb. That does not explain why Vreg5 changes. Can you please share some more information on how much change in Vreg 5 you see? Regards, Gerold" + }, { + "contentId" : "3327978", + "userName" : "Yuchang Zhang", + "rankPoints" : "8080", + "rankName" : "Expert", + "date" : "Apr 26, 2020 5:34 AM", + "userId" : "4780235", + "content" : "Hi Edward, Check PGOOD is high or not while the output gets 0.8V~1V increase, I suppose the Vout is set 5V, and if Vout get 0.8V~1V higher, it may trigger PG rising fault or even OV protection. but if the reason is caused by feedback resistor change as Gerold mentioned, which will cause the target Vout change, Vout OV will not happen and PG should keep high. you can check FB resistors based on this. Vreg5 will switchover from 5Vout, so it makes sense 5Vout higher cause Vre5 higher, and Vreg3 is linear regulated from VO1, so it will not be changed. BTW, you said SW jitter is stable, Did you compare the duty cycle between 25C and 60C? is it match with the corresponding Vout value? Upload your schematic and waveforms for review. Yuchang" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS51225C" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900078.json b/data/json/DLP/900078.json new file mode 100644 index 0000000000000000000000000000000000000000..0dc211f85d1ecd07ecb1a1339f7343563eb3158f --- /dev/null +++ b/data/json/DLP/900078.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900078", + "reporterName" : "Agate", + "rankPoints" : "790", + "resolutionStatus" : "Resolved", + "ticketName" : "CCS/IWR6843AOPEVM: 6843 EVM Can't work vital sign lab", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 18", + "queryText" : "Part Number: IWR6843AOPEVM Tool/software: Code Composer Studio Dearcompany We run vital sign lab on 6843AOP EVB but always NG . We don't change any thing and this module can run other labs normally . We show some information for reference . Can help to find out what is the root cause ? IC issue or application lab sensitive to use ? Our boss try many module for verifyt his but vital sign lab is sensitive to PCB hardware. , now we verifycompany mmwave AOP EVM the result is can't work , It's means vital sign only for demo use ? Error message shows at mss line 635 . BR", + "partNumber" : " IWR6843AOPEVM", + "allResponseList" : [ { + "contentId" : "3328249", + "userName" : "Akash Gondalia", + "rankPoints" : "39385", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 3:39 AM", + "userId" : "4768107", + "content" : "Hi Agate, The IWR6843AoP version of the Vital Signs lab requires the mmWaveICBOOST in order to run. Please note that support for this lab is limited on E2E Forums. Regards AG" + }, { + "contentId" : "3328379", + "userName" : "Toyota-1", + "rankPoints" : "810", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 6:49 AM", + "userId" : "5242701", + "content" : "Dearcompany Why need mmwaveICBOOST to run? We are step by step key in cfg setting to module , the message show mss error at line 637. BR" + } ], + "tags" : [ "/support/sensors/f/1023/tags/code%2bComposer%2bstudio", "/support/sensors/f/1023/tags/IWR6843AOPEVM" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900080.json b/data/json/DLP/900080.json new file mode 100644 index 0000000000000000000000000000000000000000..f34b7c542d522c9afa418cd4488e51660426050f --- /dev/null +++ b/data/json/DLP/900080.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900080", + "reporterName" : "Neal Reda", + "rankPoints" : "55", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS1HB16-Q1: DIA_EN PULLED HIGH", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 30", + "queryText" : "Part Number: TPS1HB16-Q1 Is it okay to just pull the DIA_EN pin high and still be able to use the diagnostic functions of the chip. We don't have enough pins left on our microcontroller and want to make sure the part will still work correctly if we do this. The data sheet says this pin is active high and as far as we can tell, it doesn't explicitly say that the part needs to see a transition from low to high on this signal. But we wanted to confirm this. Thank you.", + "partNumber" : " TPS1HB16-Q1", + "allResponseList" : [ { + "contentId" : "3327391", + "userName" : "Timothy Logan", + "rankPoints" : "5600", + "rankName" : "Expert", + "date" : "Apr 24, 2020 5:52 PM", + "userId" : "1849899", + "content" : "Neal, Yes. It is OK to pull the DIA_EN pin high for this device. Not when diagnostics are enabled the current consumption will be slightly higher on the device." + }, { + "contentId" : "3327455", + "userName" : "Neal Reda", + "rankPoints" : "55", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 6:48 PM", + "userId" : "4210048", + "content" : "Hi Timothy, Thank you for the quick reply and for pointing out the increased current consumption. One other question we have is if it would be okay to tie ENABLE and LATCH together? Thank you, Neal" + }, { + "contentId" : "3327554", + "userName" : "Timothy Logan", + "rankPoints" : "5600", + "rankName" : "Expert", + "date" : "Apr 24, 2020 9:14 PM", + "userId" : "1849899", + "content" : "Hello Neal, You should be able to connect ENABLE and LATCH together- although there is a caveaut. The LATCH pin is used to reset the device when an over current event occurs (such as a short-to-ground). If you pull the pin high and are unable to control it from your MCU you cannot \"reset\" the switch in case of a fault condition." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS1HB16_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900086.json b/data/json/DLP/900086.json new file mode 100644 index 0000000000000000000000000000000000000000..f93a8d1c8b3a6b817776d4e96d1f2c224d468300 --- /dev/null +++ b/data/json/DLP/900086.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900086", + "reporterName" : "Troyson Li", + "rankPoints" : "2040", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ25306: Can offer the full datasheet?", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 13", + "queryText" : "Part Number: BQ25306 Hi team , My customer just find a simple datasheet of BQ25306 in . Can you offer the full datasheet ? Thank you!", + "partNumber" : " BQ25306", + "allResponseList" : [ { + "contentId" : "3327965", + "userName" : "ezhao", + "rankPoints" : "7380", + "rankName" : "Expert", + "date" : "Apr 26, 2020 4:25 AM", + "userId" : "1056261", + "content" : "Troyson,Please go to /product/BQ25306?qgpn=bq25306 Scroll down and you will find: Request samples and more Information Full data sheet is available. Request now" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25306" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900089.json b/data/json/DLP/900089.json new file mode 100644 index 0000000000000000000000000000000000000000..b9c683e19d24151510819a1ec7b47fec765080d0 --- /dev/null +++ b/data/json/DLP/900089.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900089", + "reporterName" : "Troyson Li", + "rankPoints" : "2040", + "resolutionStatus" : "", + "ticketName" : "BQ25883: Why the charge current is not change after writing the value into REG01 successfully?", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: BQ25883 Hi team , My customer found that they can write current value into REG01 successfully. But the fast charge current is not changed and it still is default value. Can you help to solve it? Thank you! The following attachment is their setting of register. M12_BQ25883_Configuration_20200303.txt", + "partNumber" : " BQ25883", + "allResponseList" : [ { + "contentId" : "3327671", + "userName" : "Michael Emanuel35", + "rankPoints" : "2055", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 11:32 PM", + "userId" : "4996893", + "content" : "Dear Troyson, Can you provide some more information on the setup, such as a schematic? Waveforms of VBUS, SW, BAT, and IBAT would be helpful. What do they mean they can successfully write but it doesn't change? The registers indicate no IINPDM, VINDPM, nor TREG. There should be nothing preventing a write to the register and from the charger demonstrating that change. Thanks, Mike Emanuel Please click \"This resolved my issue\" button if this post answers your question." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25883" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900092.json b/data/json/DLP/900092.json new file mode 100644 index 0000000000000000000000000000000000000000..d0295533478b4a72f380ddcd62206b675d19d879 --- /dev/null +++ b/data/json/DLP/900092.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900092", + "reporterName" : "apullin", + "rankPoints" : "575", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC23511: Driving MOSFET pair as SSR ; simplifying TIDUC87A?", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 24", + "queryText" : "Part Number: UCC23511 Can UCC23511 (or similar) be used along with 2 N-MOSFETS to get a simple, isolated SSR replacement? Assuming that the gate-side supply is provided through other means and is also isolated from the control domain. I am looking at the TIDUC87A app note for SSR replacements, but the isolated control and gate drive block shown in Fig 11 does have quite a few parts. In my application, this will be repeated x8, so reducing complexity and part count is of interest (and, hopefully, simplicity of hardware verification), even if it is slightly more expensive. If this appears in any existingcompany reference designs or app notes, please let me know.", + "partNumber" : " UCC23511", + "allResponseList" : [ { + "contentId" : "3327513", + "userName" : "Don Dapkus", + "rankPoints" : "174575", + "rankName" : "Guru", + "date" : "Apr 24, 2020 8:11 PM", + "userId" : "1027", + "content" : "Hi, Apullin, Yes, you can, the only trick is you need an isolated power supply to drive the UCC23511. Here is an example of one: Just drive your two fets source to source and connect the common point from the driver to that note and you will be all set. If this answered your question, please press the Green button. If you have further questions, let us know!" + }, { + "contentId" : "3327612", + "userName" : "apullin", + "rankPoints" : "575", + "rankName" : "Intellectual", + "date" : "Apr 24, 2020 10:04 PM", + "userId" : "1182329", + "content" : "Great! I can eliminate ~100 parts from the BOM with this. One follow-on question: The SLLU282A note you provide uses SN6505B and a transformer for a truly galvanically isolated supply. Could an implementation follow TIDUC91, where the isolated-side VCC of the UCC23511 could be \"self-powered\" from the load domain, especially given that it is already LV AC (HVAC)? (assuming a complete supply there, e.g. rectification, vreg, uv lockout) However, I do see the potential advantage of using a single transformer + driver to make an isolated supply that could drive the whole gang of 8 drivers on a single dedicated supply. The hesitance to do that is adding a wound transformer to the board is not easy due to the part height and footprint." + }, { + "contentId" : "3329087", + "userName" : "Don Dapkus", + "rankPoints" : "174575", + "rankName" : "Guru", + "date" : "Apr 27, 2020 4:03 PM", + "userId" : "1027", + "content" : "Hi, Apullin, Let me ask my colleague to comment on TIDUC91 for you." + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC23511" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900095.json b/data/json/DLP/900095.json new file mode 100644 index 0000000000000000000000000000000000000000..8bf485e12fdf5b989145eca1ed935010604bd9c4 --- /dev/null +++ b/data/json/DLP/900095.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "900095", + "reporterName" : "user6310179", + "rankPoints" : "40", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ24765EVM: ac power problem", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 31", + "queryText" : "Part Number: BQ24765EVM Hello, I am following the user manual for BQ 24765 on page 6. /lit/ug/sluu415a/sluu415a.pdf?ts=1587751942176 When I turn PS 1 on the diode D7 lights up. However, when I turn on PS 1 D5 does not turn on. Neither does any of the other diodes and the voltages are not correct. For instance, V(TP(ACIN)is -0.4V. The voltage reaches J1 on the circuit board but nothing else. Is this definitely related to the board and could this be a problem with the board? Thank You", + "partNumber" : " BQ24765EVM", + "allResponseList" : [ { + "contentId" : "3327649", + "userName" : "Angelo Zhang87", + "rankPoints" : "6530", + "rankName" : "Expert", + "date" : "Apr 24, 2020 10:48 PM", + "userId" : "5346700", + "content" : "Hi, Based on your observation that ACIN = -0.4 V, it definitely sounds like something is wrong with the hardware - perhaps a broken trace or an un-soldered pad. The ACIN voltage is set by a resistor divider from the adapter to ACIN to GND. The ACOK LED (D5) cannot turn on unless ACIN > 2.4 V. Can you please check to see whether the adapter voltage reaches TP2 (VIN)? If it does, then can you check the soldering for R2 and R3 to see why the ACIN voltage is incorrect? Best regards, Angelo" + }, { + "contentId" : "3327654", + "userName" : "Steve Preissig", + "rankPoints" : "4610", + "rankName" : "Expert", + "date" : "Apr 24, 2020 10:56 PM", + "userId" : "8914", + "content" : "Hi there, Can you confirm that the board's jumper configuration is in the factory default state as per the table of section 1.4 in the EVM user guide? The ACIN Test Point (TP3) is in the middle of a resistor divider directly between J1 PWR and GND, so it is a good starting point to debug. Do you have a way to measure the input current at J1 and can you confirm that it is less than an amp (assuming you don't have a load applied at J10 connector and aren't charging.) Do you measure the J1 voltage at TP2? If you have a multimeter that can measure resistance, can you remove the power from the board and measure the resistance from TP2 to TP3 and then from TP3 to TP1 (GND)? The first measurement should be close to 430K and the second should be close to 66.5K. If you can let me know what you measure at some of these points, we should be able to narrow down the source of the issue. If you are measuring 20V at TP2 and -0.4V at TP3, then I don't see an explanation other than R2 is open, R3/C4 is shorted, or the IC is damaged (the ACIN pin should be high impedance.) Regards, Steve" + }, { + "contentId" : "3328943", + "userName" : "user6310179", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 2:52 PM", + "userId" : "6310179", + "content" : "Hello Angelo, Thanks for your help. TP2 is the same voltage as Vin. R2 and R3 seem to be the problem. After writing the previous sentences, I touched the multimeter probe a few more times to R2 and R3 and their voltages changed and the LEDs came on. Other than that I changed nothing. Maybe I wiped off some material on the resistors. I am confused but it works now. Thank You, Brendan" + }, { + "contentId" : "3328958", + "userName" : "Angelo Zhang87", + "rankPoints" : "6530", + "rankName" : "Expert", + "date" : "Apr 27, 2020 3:00 PM", + "userId" : "5346700", + "content" : "Hi Brendan, Great, thanks for the update! I'm glad the issue is resolved. I will close this thread for now, but feel free to let us know if you run into any other issues. Best regards, Angelo" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24765EVM" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900101.json b/data/json/DLP/900101.json new file mode 100644 index 0000000000000000000000000000000000000000..ffa49741e98dd7ed4660515a0b04ed8eda5473cf --- /dev/null +++ b/data/json/DLP/900101.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900101", + "reporterName" : "senthil kumar4", + "rankPoints" : "10", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC25705: switching freqency", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 8", + "queryText" : "Part Number: UCC25705 is this ic will work at lower switching frequency like less than 100Khz. just i need to select the Rt and Ct value like other controllers to achieve 100khz", + "partNumber" : " UCC25705", + "allResponseList" : [ { + "contentId" : "3329751", + "userName" : "Teng Feng", + "rankPoints" : "9390", + "rankName" : "Genius", + "date" : "Apr 28, 2020 2:05 AM", + "userId" : "5617595", + "content" : "Hello, You can use the UCC25705 in a 100kHz design, please use the calculator tool provided below to cross-check your values: /.../slvc008 Regards, Teng" + } ], + "tags" : [ "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2bDC_2F00_DCconverter", "/support/power-management/f/196/tags/UCC25705" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900102.json b/data/json/DLP/900102.json new file mode 100644 index 0000000000000000000000000000000000000000..e2b5194d3c9a62c8cbd1dc9340525e9859a29f98 --- /dev/null +++ b/data/json/DLP/900102.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900102", + "reporterName" : "Winfield Hill", + "rankPoints" : "70", + "resolutionStatus" : "", + "ticketName" : "TPS62203: Startup from USB power, 100mA max", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 17", + "queryText" : "Part Number: TPS62203 In a system that's powered from USB, the TPS62203 is creating 3.3 volts, which powers a CPU, that then seeks and gets permission to draw up to 500mA. But prior to that time, we're only allowed to draw 100mA. What inductor and output capacitor values will guarantee that 3.3-volts is reached during the 60mA soft-start time? How long is the 60mA time?", + "partNumber" : " TPS62203", + "allResponseList" : [ { + "contentId" : "3328122", + "userName" : "Febin", + "rankPoints" : "1450", + "rankName" : "Intellectual", + "date" : "Apr 26, 2020 4:59 PM", + "userId" : "5781698", + "content" : "Hi Winfield, In general, soft start depends on total capacitance on the output as well as the load current during start up. Since we do not have characterization data for all measurement conditions readily available, I recommend to follow the datasheet specifications. You could start with the BOM used in the EVM and see if you achieve the desired output voltage in your application. Regards, Febin" + } ], + "tags" : [ "/support/power-management/f/196/tags/Soft%2bStart", "/support/power-management/f/196/tags/USB%2bcurrent%2blimit", "/support/power-management/f/196/tags/TPS62203" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900103.json b/data/json/DLP/900103.json new file mode 100644 index 0000000000000000000000000000000000000000..dfdb26f5e7953e7734b3febf101657766e85e88b --- /dev/null +++ b/data/json/DLP/900103.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900103", + "reporterName" : "Nathan Gartner", + "rankPoints" : "30", + "resolutionStatus" : "", + "ticketName" : "TPS54240: Snubber Circuit to reduce EMI", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 31", + "queryText" : "Part Number: TPS54240 Hello, I utilized the TPS2511EVM-141 components and layout in a design with a BLE connected device and the Circuit is failing radio emissions testing due to EMI created by the switching regulator, TPS54240. We have high frequency ringing around 180MHz. I would like to know if there are any recommendations for a snubber circuit or any kind of filtering for use with the components and respective values in on the EVM board that will effectively reduce ringing on the output of the TPS54240 and minimize EMI so we can pass our EMC testing See attached Data sheet, schematic on PG 4.5516.TPS2511EVM-141.userGuide.pdf Thank you", + "partNumber" : " TPS54240", + "allResponseList" : [ { + "contentId" : "3327815", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 25, 2020 9:28 AM", + "userId" : "3498075", + "content" : "Hi Nathan, Did you mean the circuit pass CE and failed RE test at 180MHz? do you have chance to upgrade the design withcompany latest converter which has better EMI performance? You try something below on present circuit: 1. add 4.7--22 ohm in series with BOOT cap 2. Add snubber on PH pin----refer to Application note: /lit/an/slua831a/slua831a.pdf SLUA831A B R Andy" + }, { + "contentId" : "3329285", + "userName" : "Nathan Gartner", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 5:53 PM", + "userId" : "6329656", + "content" : "Thank you for the reply Andy, 1. I will modify and test this 2. I have added a snubber cicuit on the PH Pin and noticed a reduction in frequency from 180MHz to 42MHz. How can I tell if the part I am using is the latest converter from TI? I am using: TPS54240DGQR Thank you. Nathan" + }, { + "contentId" : "3329811", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 28, 2020 3:04 AM", + "userId" : "3498075", + "content" : "Hi Nathan, Pls check latest LMR63625 which has much better EMI performance. B R Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS2511EVM_2D00_141", "/support/power-management/f/196/tags/EMI%2bFilter", "/support/power-management/f/196/tags/High%2bFrequency%2bRinging", "/support/power-management/f/196/tags/snubber%2bcircuit", "/support/power-management/f/196/tags/TPS54240" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900105.json b/data/json/DLP/900105.json new file mode 100644 index 0000000000000000000000000000000000000000..9d7e5058c12c52ccf9addd1eaa282f45355fe22f --- /dev/null +++ b/data/json/DLP/900105.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900105", + "reporterName" : "Arief Hernadi", + "rankPoints" : "17155", + "resolutionStatus" : "Resolved", + "ticketName" : "LM2594: LM2594 / LM2594HV Protection Features: Current Limit and Thermal Shutdown", + "rankName" : "Genius", + "replies" : " 2", + "views" : " 13", + "queryText" : "Part Number: LM2594 Dear Sir /Madam, Would you mind elaborating more on the LM2594Protection Features such as Current Limit and Thermal Shutdown? Does the device recover itself and continue normal operation after detecting such fault? Or does it require a power cycle to get back to normal? Thank you -Arief", + "partNumber" : " LM2594", + "allResponseList" : [ { + "contentId" : "3327479", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 7:18 PM", + "userId" : "1881345", + "content" : "Hello Thank you for choosingcompany as your component supplier of choice, and thank you for reaching out to us with your questions regarding the LM2594 family of DC/DC converters. Let me try to answer your questions as best as I can. 1. The LM2594 has thermal shutdown, current limit and short circuit protection. 2. Unfortunately, we do not have data for the exact values of the TSD trip points. However, I would guess that they are in the region of shutdown at 150°C and recovery at 140°C. The recovery is automatic and requires no power cycle, etc. 3. The current limit is cycle-by-cycle. Once the inductor current hits the current limit, that switching cycle is terminated. The next clock cycle will turn the power switch back on. This is your typical cycle-by-cycle current limit operation that is common to many buck regulators; no power cycle, etc. is required. 4. The short circuit protection begins to operate at approximately 10% above the first current limit level, mentioned above. With very heavy overloads, and/or short circuit on the output, the inductor current can exceed the first current limit threshold. This can occur due to inductor saturation and/or delays in the current limit comparator. If the inductor current reaches the +10% level, then the switching frequency will begin to fold back. This will help to give the inductor more time to release its stored energy and prevent inductor current run-away. Once the overload is removed, the device will function normally; no power cycle, etc. is required. This method is also commonly found in many DC/DC converters. 5. Of course, all of these protection methods cannot ensure that the device will be \"bullet proof\" against all types of abuse. However, they are most effective when the device is used within the recommendations and guidelines provided in the device data sheet and any pertinent app notes. 6. All of the above applies to the LM2595 and LM2596 family of devices as well. I hope that this has helped to answer your questions. If I can help you with anything else, please do not hesitate to ask. Again, thank you for choosing TI,and have a nice day. Sincerely, Frank D" + }, { + "contentId" : "3327593", + "userName" : "Arief Hernadi", + "rankPoints" : "17155", + "rankName" : "Genius", + "date" : "Apr 24, 2020 9:52 PM", + "userId" : "1949787", + "content" : "Hello Sir, Thank you for a very detailed answer on the protection features on LM2594. This will be a very useful information for all customer using the LM2594 / LM2594 HV Thank you -Arief" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM2594", "/support/power-management/f/196/tags/LM2594HV" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900106.json b/data/json/DLP/900106.json new file mode 100644 index 0000000000000000000000000000000000000000..719ff37116712ab39c1fddb2e69ef1553ad69c89 --- /dev/null +++ b/data/json/DLP/900106.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "900106", + "reporterName" : "Jonathan Geronga", + "rankPoints" : "3280", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC256404: Using this part for multiple outputs", + "rankName" : "Expert", + "replies" : " 6", + "views" : " 35", + "queryText" : "Part Number: UCC256404 Hi Team, I am posting this inquiry on the customer's behalf. The customer would like to use UCC256404 in his new design (changing the UCC256301 to UCC256404 because their power requirements increased) in the image below: Here's the question from the customer: The customer plan on having 4x outputs. One 40V output that the voltage feedback will sense. A 400V output, and two housekeeping outputs. There are conditions where the 400V output will need +700W while the 40V output is essentially unloaded. They are curious about cross regulation performance with multiple outputs for the LLC controller. Specifically, concerned about how the control loop will respond as the loads change on the various outputs. Also, curious about how the control loops handle transients and steady state operations when supplying power to multiple transformer outputs. If the control loop regulates the voltage based on an unloaded output, what happens to the other outputs when they're at full power? Please let me know if you need more information. Thanks! Jonathan", + "partNumber" : " UCC256404", + "allResponseList" : [ { + "contentId" : "3327540", + "userName" : "Hong Huang", + "rankPoints" : "18085", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 8:56 PM", + "userId" : "616779", + "content" : "What is the 40V output load range? In general, the feedback should be from the highest rated load output, especially when considering the transient. The output with feedback loop connection will be regulated and compensated by the loop either in steady state or transient, other outputs are cross-regulated. The cross-regulated outputs may not have good regulation and transient response if the leakage inductance is high." + }, { + "contentId" : "3327552", + "userName" : "Scott Jensen1", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 9:14 PM", + "userId" : "4823661", + "content" : "The 40V supply load range is 0-10A. There's also the possibility that charge will be dumped onto the 40V rail from the load, which would raise the voltage. The 40V rail powers a motor that can do regenerative braking." + }, { + "contentId" : "3327582", + "userName" : "Hong Huang", + "rankPoints" : "18085", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 9:41 PM", + "userId" : "616779", + "content" : "Which output needs most accurate regulation and minimum undershoot/overshoot? After you decide this, you should put the feedback loop to that output. You can also use weighted feedback if both 40V and 400V share the same output ground." + }, { + "contentId" : "3327584", + "userName" : "Hong Huang", + "rankPoints" : "18085", + "rankName" : "Mastermind", + "date" : "Apr 24, 2020 9:42 PM", + "userId" : "616779", + "content" : "If both 40V and 400V outputs require very good regulation, you can have a post regulation on 40V." + }, { + "contentId" : "3327592", + "userName" : "Scott Jensen1", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 24, 2020 9:51 PM", + "userId" : "4823661", + "content" : "Would the SIMPLIS model give me accurate results for what the control loops will do when I have transients on the outputs? I understand the leakage of the various outputs will have a strong effect on the cross regulation performance. I'm more concerned about the IC entering into a skip mode when the 40V output is unloaded (or has charge dumped onto it), while the 400V rail is outputting maximum power." + }, { + "contentId" : "3327834", + "userName" : "Hong Huang", + "rankPoints" : "18085", + "rankName" : "Mastermind", + "date" : "Apr 25, 2020 10:58 AM", + "userId" : "616779", + "content" : "It will depend on how you model the leakage inductance which may not reflect reality of your transformer. You can list each output regulation requirement, transient requirement, load range, then decide to use the most required output for your feedback loop. If you have two outputs with similar requirements, you need to consider additional techniques such as weighted feedback or post regulation." + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC256301", "/support/power-management/f/196/tags/UCC256404" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900114.json b/data/json/DLP/900114.json new file mode 100644 index 0000000000000000000000000000000000000000..1f6f3b2b502d156592a8735a12d8d7da02208a0a --- /dev/null +++ b/data/json/DLP/900114.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900114", + "reporterName" : "bbrienzo", + "rankPoints" : "90", + "resolutionStatus" : "", + "ticketName" : "LM5166: Selecting a current limit", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 22", + "queryText" : "Part Number: LM5166 Hi, As I understand it, there are discrete current limit thresholds on the LM5166. The datasheet gives specific resistor values to connect to the ILIM pin to select one of them. What is the tolerance on those resistor values? If I wanted the 300mA out limit, for example, would I be okay using a 50k resistor? What would be the dangers of not using the exact values? Ben", + "partNumber" : " LM5166", + "allResponseList" : [ { + "contentId" : "3327817", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 25, 2020 9:39 AM", + "userId" : "3498075", + "content" : "Hi, Tolerance 1% is OK. For 300mA at OCT mode, the Rlim should be open or >=100Kohm B R Andy" + }, { + "contentId" : "3328928", + "userName" : "bbrienzo", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 2:41 PM", + "userId" : "1510417", + "content" : "Sorry I didn't clarify, I'm running the chip in PFM mode. If I want 300mA out how close to the 56.2k do I need to be? Will a 50k work? I didn't see any spec's or explanation for how the Ilim selection works. Ben" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM5166" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900120.json b/data/json/DLP/900120.json new file mode 100644 index 0000000000000000000000000000000000000000..3e2f5cc38eb48fb69665efc1dce4a0e9d0dc6100 --- /dev/null +++ b/data/json/DLP/900120.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900120", + "reporterName" : "Steve Allen", + "rankPoints" : "40", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS55288: Looking for detailed data sheet showing efficiency curve over load and voltage", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 16", + "queryText" : "Part Number: TPS55288 Looking for detailed data sheet for the pre-release of the TPS55288. The efficiency of 97% isn't really backed up in the data that is present on the web.", + "partNumber" : " TPS55288", + "allResponseList" : [ { + "contentId" : "3328423", + "userName" : "Helen chen", + "rankPoints" : "32965", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 7:26 AM", + "userId" : "4197150", + "content" : "Dear Sir, What is the Vin, Vo and the Io? We can discuss it by email." + }, { + "contentId" : "3328608", + "userName" : "Steve Allen", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 10:57 AM", + "userId" : "6243745", + "content" : "Helen, Looking for efficiency curve not just raw numbers. Sometimes these types of devices have peak efficiencies at one operating point only and fall off to sub 90% efficiency outside of this operating point. The preliminary datasheet only specifies one operating point where it's 97% efficient. Is that in buck or boost mode? I'm also a little puzzled why the two external FETs needed for the buck leg. Typically an internal FET design one would see the FETs all internal or external and then called a controller. In the particular configuration I'm interested in the working parameters would be: 9V to 30V input Variable output voltage (5v, 9V, 12v, 18v) in various use cases Current would be 1.5A to 3A for the above use cases. Could you provide efficiency numbers for these four voltage outputs at 1.5, 2.0, 2.5 and 3.0 amp loads under a 9 to 30V input? Many thanks." + }, { + "contentId" : "3329788", + "userName" : "Helen chen", + "rankPoints" : "32965", + "rankName" : "Mastermind", + "date" : "Apr 28, 2020 2:41 AM", + "userId" : "4197150", + "content" : "Dear Sir, The BUCK FET is a must because of the logic requirement. Please check the attached ppt for the eff curve. Not have Vo=18V data. But it is between Vo=15V and Vo=20V. 400kHz_IPZ40N04S5L-4R8_nosnubber.pptx" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS55288" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900121.json b/data/json/DLP/900121.json new file mode 100644 index 0000000000000000000000000000000000000000..89cdfd42f54d303aaad32336623fc53ea40fa3d6 --- /dev/null +++ b/data/json/DLP/900121.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900121", + "reporterName" : "Eduardo Estrada1", + "rankPoints" : "20", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS25926: How to reversed bias to generate heat", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 15", + "queryText" : "Part Number: TPS25926 Hellocompany Team, We are developing a thermal validation vehicle. We do not expect the board to be functional. The goal is to replicate the power dissipation of the main ingredients of the production board. To do so we are applying reversed bias connection to some devices like voltage regulators, so the body diode of the FET generates heat. We would like to do the same to the by applying power to the TPS259261 by: Applying 12V to OUT pins (8,7,6) and GND (Thermal Pad -11) Apply Ground to VIN pins (5,4,3) We would be using a controlled power supply to limit the current so we just to generate the expected power per our thermal simulations. Do you think is this doable? Are these the right pins to be connected, is there any other pin termination we should take into account? Thanks in advance -Eduardo", + "partNumber" : " TPS25926", + "allResponseList" : [ { + "contentId" : "3328331", + "userName" : "Praveen GD", + "rankPoints" : "9575", + "rankName" : "Genius", + "date" : "Apr 27, 2020 6:06 AM", + "userId" : "4421098", + "content" : "Hi Eduardo, Welcome to e2e forum ! Both the methods that you intend to use below are not recommended operating conditions in general. Since you intend the boards not to be functional and just replicate the power dissipation of the IC. I would recommend you go with the following approach but please make sure the continuous current flowing in the body diode is not greater than 0.5 A (you can set a current limit to the power supply). Applying 12V to OUT pins (8,7,6) and GND (Thermal Pad -11)" + }, { + "contentId" : "3329035", + "userName" : "Eduardo Estrada1", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 3:35 PM", + "userId" : "6332280", + "content" : "Hi Praveen, Thanks a lot for your answer. This solves our issue." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS25926" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900124.json b/data/json/DLP/900124.json new file mode 100644 index 0000000000000000000000000000000000000000..007849032e691be9728618a69179350f44afeb4c --- /dev/null +++ b/data/json/DLP/900124.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900124", + "reporterName" : "Neal Reda", + "rankPoints" : "55", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS1HB16-Q1: ENABLE and LATCH", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 23", + "queryText" : "Part Number: TPS1HB16-Q1 Hi Timothy, Thank you for the quick reply and for pointing out the increased current consumption. One other question we have is if it would be okay to tie ENABLE and LATCH together? Thank you, Neal", + "partNumber" : " TPS1HB16-Q1", + "allResponseList" : [ { + "contentId" : "3327553", + "userName" : "Timothy Logan", + "rankPoints" : "5600", + "rankName" : "Expert", + "date" : "Apr 24, 2020 9:14 PM", + "userId" : "1849899", + "content" : "Hello Neal, You should be able to connect ENABLE and LATCH together- although there is a caveaut. The LATCH pin is used to reset the device when an over current event occurs (such as a short-to-ground). If you pull the pin high and are unable to control it from your MCU you cannot \"reset\" the switch in case of a fault condition." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS1HB16_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900125.json b/data/json/DLP/900125.json new file mode 100644 index 0000000000000000000000000000000000000000..17341f25eadb061f5a43c510613bf0b2a956d978 --- /dev/null +++ b/data/json/DLP/900125.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900125", + "reporterName" : "Anne Adamczyk", + "rankPoints" : "65", + "resolutionStatus" : "Resolved", + "ticketName" : "LDC2112: Plan for automotive qualification?", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 25", + "queryText" : "Part Number: LDC2112 I like the ability of the LDC2112 to operate in stand-alone mode without an external MCU. My application is automotive. From what I can see, the only automotive-qualified LDCs are LDC1612/4 and LDC1312/4, neither of which can operate in stand-alone mode. Are there plans (and maybe a timeline) to have an automotive-qualified LDC2112 or similar part? Thank you, Anne", + "partNumber" : " LDC2112", + "allResponseList" : [ { + "contentId" : "3327571", + "userName" : "Kristin Jones93", + "rankPoints" : "15785", + "rankName" : "Genius", + "date" : "Apr 24, 2020 9:31 PM", + "userId" : "4996845", + "content" : "Hi Anne, Can you send me a private message so we can discuss the LDC roadmap offline? Also, please note that the LDC2112 registers do need to be programmed by an MCU whenever it powers on; after this the MCU can be put in sleep mode and the LDC2112 will operate independently. Best Regards," + }, { + "contentId" : "3328605", + "userName" : "Anne Adamczyk", + "rankPoints" : "65", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 10:53 AM", + "userId" : "5121089", + "content" : "Thank you! I guess I didn't read far enough into the data sheet to realize it needed to be programmed at power-on. I was hoping to reduce cost in the circuit. I'll send you a message about the roadmap. Anne" + } ], + "tags" : [ "/support/sensors/f/1023/tags/LDC1312", "/support/sensors/f/1023/tags/LDC2112", "/support/sensors/f/1023/tags/LDC1612" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900129.json b/data/json/DLP/900129.json new file mode 100644 index 0000000000000000000000000000000000000000..1bf18f42a1a6dd4f6ed056ab013075776207c2e2 --- /dev/null +++ b/data/json/DLP/900129.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "900129", + "reporterName" : "Will Brown", + "rankPoints" : "200", + "resolutionStatus" : "Resolved", + "ticketName" : "LM5050-1: Connecting \"IN\" further upstream to reduce losses", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 27", + "queryText" : "Part Number: LM5050-1 The LM5050 datasheet says that it is designed to regulate the voltage across the MOSFET to 22mV if possible. Otherwise it will saturate the gate voltage to about 12V. When using a low Rds MOSFET (1m Ohm), it seems the LM5050 will be holding the MOSFET Vds at 22mV for currents less than 22A, when the MOSFET could achieve lower Vds if the gate was driven harder. At a nominal current of 10A (with Rds = 1m Ohm), forcing Vds=22mV creates about 0.22W of power dissipation, when it may be as low at 0.1W if the gate was driven hard enough. In the example circuit shown here (TPS2493 followed by an LM5050) are there any drawbacks to moving the connection of the \"IN\" pin of the LM5050 directly to the source voltage, so that the drop across the 1m Ohm sense resistor and the hot-swap MOSFET are combined in to the 22mV that the LM5050 is trying to servo? Thanks for any insights, Will", + "partNumber" : " LM5050-1", + "allResponseList" : [ { + "contentId" : "3327771", + "userName" : "Karikalan Selvaraj", + "rankPoints" : "13870", + "rankName" : "Genius", + "date" : "Apr 25, 2020 5:03 AM", + "userId" : "1601212", + "content" : "HI Will, Connecting IN before Hot-Swap is not recommended, because when hot-swap is off, IN-OUT voltage would be higher than normal operation. IN-OUT is not rated more than 2V drop in the forward direction. Regards, Kari." + }, { + "contentId" : "3327780", + "userName" : "Will Brown", + "rankPoints" : "200", + "rankName" : "Prodigy", + "date" : "Apr 25, 2020 5:26 AM", + "userId" : "5920759", + "content" : "Hi Kari, Thanks for the quick reply and concise answer. Is this 2V rating listed in the datasheet or some app note? I don't recall running across the 2V rating. Thanks, Will" + }, { + "contentId" : "3328440", + "userName" : "Karikalan Selvaraj", + "rankPoints" : "13870", + "rankName" : "Genius", + "date" : "Apr 27, 2020 7:39 AM", + "userId" : "1601212", + "content" : "Hi 2V rating is not listed in the datasheet or an app note. Regards, Kari." + }, { + "contentId" : "3328674", + "userName" : "Will Brown", + "rankPoints" : "200", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 12:15 PM", + "userId" : "5920759", + "content" : "Kari, Thanks for the followup. Will" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM5050_2D00_1", "/support/power-management/f/196/tags/TPS2493" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900133.json b/data/json/DLP/900133.json new file mode 100644 index 0000000000000000000000000000000000000000..9219a2eaaceb16345cd28f5c1e546ce96bc8412d --- /dev/null +++ b/data/json/DLP/900133.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900133", + "reporterName" : "Vu Tran27", + "rankPoints" : "335", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ28Z610: What is the condition to clear GaugingStatus[BAL_EN] flag?", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 15", + "queryText" : "Part Number: BQ28Z610 Hello, What could be the reason GaugingStatus[BAL_EN] flag is cleared? I tried testing the cell balancing function by using 2 cell batteries with different voltages. I noticed that after a while, GaugingStatus[BAL_EN] becomes low although QEN flag and GAUGE_EN flag are still high. If I send a GAUGE_EN() command from bqstudio, QEN flag and GAUGE_EN flag become low and BAL_EN goes high. I want to know if I can rely on bq28z610 to do cell balancing automatically or I have to periodically check the BAL_EN flag and take action accordingly. I have looked at the TRM but there is no mention on the condition of BAL_EN flag. Thank you.", + "partNumber" : " BQ28Z610", + "allResponseList" : [ { + "contentId" : "3327619", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 24, 2020 10:08 PM", + "userId" : "3528441", + "content" : "Please refer to the cell balancing section in the TRM. Thanks!" + }, { + "contentId" : "3327960", + "userName" : "Vu Tran27", + "rankPoints" : "335", + "rankName" : "Intellectual", + "date" : "Apr 26, 2020 3:48 AM", + "userId" : "5355007", + "content" : "I did and there is no mention of BAL_EN bit in that section at all." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ28Z610", "/support/power-management/f/196/tags/bqStudio" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900134.json b/data/json/DLP/900134.json new file mode 100644 index 0000000000000000000000000000000000000000..ddbacee84a5f77f965141e5befb03a8d628ae2e3 --- /dev/null +++ b/data/json/DLP/900134.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900134", + "reporterName" : "GregoireGentil", + "rankPoints" : "1655", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ27542-G1: 1500uA current leak incompany battery gauge", + "rankName" : "Expert", + "replies" : " 3", + "views" : " 14", + "queryText" : "Part Number: BQ27542-G1 Hello, I have a standalone / removable battery pack with: - the battery chemistry, Poly 3.7V one-cell 1000mAh - a battery protection IC DW01-P from Chinese Fortune - a battery charger LTC4067 from Linear - a battery gauge BQ27542. Without thecompany battery gauge BQ27542, the current leak (the current measured at the pin + of the battery chemistry) is around 150 uA. With thecompany battery gauge BQ27542, the current leak is around 1750uA. So BQ27542 is using around 1.5mA which is a lot. It will drain the battery in one month. And it's what I'm seeing. Is it normal to have such high current leak for BQ27542? Is there a way (software settings) to lower that amount? PS: I can provide the schematics in a private message.", + "partNumber" : " BQ27542-G1", + "allResponseList" : [ { + "contentId" : "3327618", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 24, 2020 10:08 PM", + "userId" : "3528441", + "content" : "Hello Gregoire, Sure, please request me as a friend. You need to check the pull up resistors for comms. It may not be the gauge pulling but other external networks." + }, { + "contentId" : "3327624", + "userName" : "GregoireGentil", + "rankPoints" : "1655", + "rankName" : "Expert", + "date" : "Apr 24, 2020 10:12 PM", + "userId" : "1236594", + "content" : "You mean the pull-up resistor on the I2C line? There is none in the battery pack. It's on the device side when the battery is inserted. Also, the current measurement seems pretty accurate as it's done with the \"Current Ranger\" tool." + }, { + "contentId" : "3327628", + "userName" : "Kang Kang", + "rankPoints" : "17055", + "rankName" : "Genius", + "date" : "Apr 24, 2020 10:15 PM", + "userId" : "3528441", + "content" : "Okay, I've sent you a message. Closing this thread out." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ27542_2D00_G1", "/support/power-management/f/196/tags/battery%2bleak", "/support/power-management/f/196/tags/current%2bleak", "/support/power-management/f/196/tags/BQ27542", "/support/power-management/f/196/tags/bqStudio" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900135.json b/data/json/DLP/900135.json new file mode 100644 index 0000000000000000000000000000000000000000..c58d33b98186d8a5a0d7d06dd4b96ab228fd6588 --- /dev/null +++ b/data/json/DLP/900135.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900135", + "reporterName" : "Jonathan Geronga", + "rankPoints" : "3280", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS4H160-Q1: Diagnostics issue with TPS4H160-Q1 version A", + "rankName" : "Expert", + "replies" : " 3", + "views" : " 29", + "queryText" : "Part Number: TPS4H160-Q1 Hi Team, We have a customer with a custom board that uses TPS4H160-Q1 version A and they are having trouble with the diagnostics. The status pins are acting unexpectedly. the product should report faults individually on each channel but they seem to all trip under overcurrent conditions. The customer is mainly concern with the diagnostics of this device. There seem to be some unexpected results when the current limit is exceeded. The customer wants to know any issues with the diagnostic STx pins for this device because they can't seem to get the device to report faults independently from the other channels Some other questions: If they exceed the external current limit on the device on one channel, should the device indicate a fault on that same channel? And how long should it take for the device to automatically recover from this fault condition? Let me know if you have any questions with the customer. Thanks, Jonathan", + "partNumber" : " TPS4H160-Q1", + "allResponseList" : [ { + "contentId" : "3327645", + "userName" : "Timothy Logan", + "rankPoints" : "5600", + "rankName" : "Expert", + "date" : "Apr 24, 2020 10:39 PM", + "userId" : "1849899", + "content" : "Hello Jonathan, Without any scope shots or schematics we cannot really determine what the fault line is indicating. The fault table is listed below in the datasheet: So it really could be any one of these or a combination of all. To answer your questions... On the A version of the device there are four different open drain ST pins that will report the fault condition independent of what the other channels are doing (assuming that the entire device didn't hit thermal shutdown). On the B version this is reported through the current sense pin and all channels are ORed together. It really depends on the fault condition. If it is thermal studown then the device will recover when it cools down enough to the reset level (155C). If it is an open load then the fault will be cleared when a load is attached. It really depends on the setup." + }, { + "contentId" : "3329539", + "userName" : "Jeffrey King", + "rankPoints" : "10", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 9:40 PM", + "userId" : "6332289", + "content" : "Hello Timothy, Thank you for your time and thoughtful response. I apologize for my tardy response, I needed to clear the release of information with my teammates. Your component is connected to 8 micro-controller output pins. The schematic below displays how it is connected on the PCB: The external current limit is set at 400 mA as shown above, the output voltage delivered to the load is 24V, and an adjustable power resistor (~60 ohm) was used to test the load conditions. For the sake of being thorough, this device is also connected to a level shifter to adjust the logic voltages (measurements collected for scope pictures) from 1.8V to 3.3V. These schematics are displayed below: The first round of testing was performed without a load attached and was designed to test the logic signals that the device was generating before delivering power. This waveform is what I would expect during normal operation: The second test displays the full recording of the operation test when the status pins have not been stressed by an overload condition. The erratic behavior of the status signals is associated with the programming of the FPGA in Vivado. The third test was the first overload test condition. In this example, the erratic behavior is gone during the FPGA programming and all of the status pins are driven low immediately. Only the LSB signal [3] was stressed with this condition. The biggest problem that I have encountered with this condition is that once the status signals are triggered, it is exceptionally difficult to them to reset out of the fault condition. On multiple occasions, I have not been able to to get the device out of fault for an entire day. Sometimes it resets on my first attempt at testing during a day, but I also left it all last weekend and it was still in fault this morning. I have never been able to see a transition in the status signal; it is either 0 or f for the duration of the experiment (aside from the erroneous programming behavior). Any help you could offer would be much appreciated. If you have any other questions, or my response needs any clarification, please feel free to reach out. I am at my wits end here.. ~Jeff" + }, { + "contentId" : "3329591", + "userName" : "Jonathan Geronga", + "rankPoints" : "3280", + "rankName" : "Expert", + "date" : "Apr 27, 2020 10:48 PM", + "userId" : "5915268", + "content" : "Hi Timothy, Thank you for your support and answer to my above question. Our customer sends a response with their schematic design and measurement. Due to the document is private. I hope it is okay with you to discuss this offline. Regards, Jonathan" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS4H160_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900145.json b/data/json/DLP/900145.json new file mode 100644 index 0000000000000000000000000000000000000000..233f2c3cbb329731b4fa7e9b48c8af0854f746cb --- /dev/null +++ b/data/json/DLP/900145.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900145", + "reporterName" : "Ming Zhang2", + "rankPoints" : "40", + "resolutionStatus" : "", + "ticketName" : "IWR6843: issue of 3D people count in toolbox 4.2.1", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 13", + "queryText" : "Part Number: IWR6843 Hello, i am evaluting IWR6843 module from Jorjin, MT5B9S-01-DTS. when trying 3D people count in toolbox 4.2.1, only cloud points seen in visulizer and cannot see any tracking box. ISK_6m_default.cfg used for chirp config. anything wrong for my operation? thanks.", + "partNumber" : " IWR6843", + "allResponseList" : [ { + "contentId" : "3329020", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 3:30 PM", + "userId" : "5118664", + "content" : "Hi, Can you send a picture of the antenna? Thanks, Justin" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR6843" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900146.json b/data/json/DLP/900146.json new file mode 100644 index 0000000000000000000000000000000000000000..513eb444846c3113a919fe582654bd47d61ec6ff --- /dev/null +++ b/data/json/DLP/900146.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900146", + "reporterName" : "Andrew West", + "rankPoints" : "10", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM317: Driving output above regulation setpoint voltage", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 16", + "queryText" : "Part Number: LM317 I have a need for a circuit that typically is operated from an adjustable regulated source, but occasionally needs to be connected to an alternate supply at a voltage higher than the regulated source output. Regulation is not critical when driven from the alternate supply. Many topologies could allow this, but for simplicity I wish to simply connect the higher-voltage supply to the load in parallel with the regulator output (as per the diagram below) if this is acceptable. From the information in the data sheets and application notes, it appears that the LM317 can source (but not sink) current and this will be OK as long as the LM317 output voltage remains below the input voltage (and other maxima are not exceeded). As the LM317 does not sink current, I expect the output voltage to rise above the regulation voltage when the alternate supply is connected. In some respects, this seems similar to operating the LM317 with insufficient output load current to maintain regulation. The external D1 protects the LM317 if Vout > Vin. My question: Is it correct that the LM317 should not be damaged by raising the output voltage above the regulation set-point voltage, as long as Vout does not exceed Vin, and therefore this kind of operation is acceptable? Are there any issues with this kind of approach? Thank you for your consideration.", + "partNumber" : " LM317", + "allResponseList" : [ { + "contentId" : "3329372", + "userName" : "Stephen Ziel", + "rankPoints" : "5640", + "rankName" : "Expert", + "date" : "Apr 27, 2020 7:08 PM", + "userId" : "6127804", + "content" : "Hi Andrew, On the surface, it looks like this design approach might work, as long as the abs max conditions are not violated as you have mentioned. It is not something we have prototyped so you may want to obtain an evaluation board and test the theory prior to placing it into your application. Another option is to use a diode-OR approach for both power sources if you can tolerate the small diode drop. Yes, linear regulators cannot usually sink current, only source it as you have mentioned. Some modern linear regulators have an internal pull down circuit on the output to keep the output from overshooting too much. I don't believe that circuit exists in these older devices, such as the LM317, so you should be safe from that aspect. I wanted to mention this just in case you decide you need a newer device. If so, you should look for a device without that feature listed in the datasheet. Thanks, - Stephen" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM317" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900150.json b/data/json/DLP/900150.json new file mode 100644 index 0000000000000000000000000000000000000000..87d3b5684ff48b7e6bf95e9b73dcd9039e36dc2e --- /dev/null +++ b/data/json/DLP/900150.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900150", + "reporterName" : "Ryan Rutledge57", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LP5569: Is the V1P8 pin really just a logic reference?", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 11", + "queryText" : "Part Number: LP5569 I started with the LP55231 on my project but realized I needed a sinking driver instead, so I ended up at the LP5569. There are many similarities but the most notable exception is V1P8 on the LP5569. The datasheet says it is the \"Input power for digital circuitry\" but with current draw under 200 µA and none of the digital inputs limited to a value relative to V1P8, is it really just a logic reference for the digital circuitry rather than an actual power supply? To make a long story short, I'll power the LP5569 from a 5V rail and I'm considering using a super cheap 1.8V reference for the V1P8 pin rather than a regulator, and leaving the I2C lines pulled up to the MCU's 3.3V logic. Is there any issue with this approach?", + "partNumber" : " LP5569", + "allResponseList" : [ { + "contentId" : "3327936", + "userName" : "Hardy Wu", + "rankPoints" : "2740", + "rankName" : "Intellectual", + "date" : "Apr 26, 2020 2:04 AM", + "userId" : "4961195", + "content" : "Hi Ryan, Yes it is OK. V1P8 is the power line for internal digital circuits but the VIH and VIL for SCL/SDA pins is set at a fixed value. Just make sure your logic supply follow the requirement at datasheet section 7.8 Logic Interface Characteristics." + } ], + "tags" : [ "/support/power-management/f/196/tags/LP55231", "/support/power-management/f/196/tags/LP5569" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900156.json b/data/json/DLP/900156.json new file mode 100644 index 0000000000000000000000000000000000000000..b21d0bfe99497d0be04b88b5a97f52c02d7255fa --- /dev/null +++ b/data/json/DLP/900156.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900156", + "reporterName" : "K.Shidara", + "rankPoints" : "2025", + "resolutionStatus" : "", + "ticketName" : "TPS24750: IMON inquiry", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 25", + "queryText" : "Part Number: TPS24750 Hi Team, Would you advise below three questions about IMON? (Question) 1. Are you assuming an application in which an AD converter is externally connected to the IMON pin of the TPS24750 to detect the current value of the SENSE resistor? If possible, could you provide an application example? 2. I could not find the relational expression to derive the current value flowing in the SENSE resistor from the IMON terminal voltage value from the datasheet and other technical data. If you have any of the above application examples, would you kindly let me know? 3. Also, if I have an AD converter connected to the IMON pin and monitor the current value, please let me know if there are any points to be aware of. Thanks Best regards, Shidara", + "partNumber" : " TPS24750", + "allResponseList" : [ { + "contentId" : "3328318", + "userName" : "Praveen GD", + "rankPoints" : "9575", + "rankName" : "Genius", + "date" : "Apr 27, 2020 5:49 AM", + "userId" : "4421098", + "content" : "Hi Shidara, You can easily understand the current limit and monitor circuit operation of TPS24750 with the help of the circuit highlighted below, From the above highlighted circuit you can deduce below two equations, 1. Iimon = Iset 2. Iset x Rset = Iload x Rsense (Applying KVL in the loop) From the above you can derive, Iimon = Iset = (Iload x Rsense) / Rset Voltage on the IMON pin, Vimon = Iimon x Rimon Therefore for a fixed value of Rsense and Rset you can see the voltage on the IMON pin is proportional to the load current , Iload. One more important point to note here is that when the efuse is in current limit mode, the voltage across IMON is regulated at 675 mV. This is how the following equation is derived. Unfortunately, we do not have a reference circuit for the ADC but you can consider the below points before selecting an ADC, Voltage range of IMON pin Minimum current that needs to be measured. ADC full scale range. This is important to understand if you will require a gain stage in between." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS24750" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900165.json b/data/json/DLP/900165.json new file mode 100644 index 0000000000000000000000000000000000000000..9ce6a6e673e9fb7b0839f3f98363d1709e1b8453 --- /dev/null +++ b/data/json/DLP/900165.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900165", + "reporterName" : "Rohit Kadecha", + "rankPoints" : "440", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ76940: Balancing", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: BQ76940 Hi, I wanted to know on balancing, Balance condition any cell > than 4.0vdc. One of cell reaches unbalancing and shows volts of 4.3vdc, and rest of the cell @3.9vdc. So balancing will start now, to balance 4.3vdc cell and will bring it to less than 4.0vdc , now here once cell volt is reduced to 3.9vd, do programmer have to stop balancing or how will the balancing will be stopped? Rohit", + "partNumber" : " BQ76940", + "allResponseList" : [ { + "contentId" : "3327916", + "userName" : "Matt Sunna", + "rankPoints" : "24930", + "rankName" : "Mastermind", + "date" : "Apr 26, 2020 1:06 AM", + "userId" : "269312", + "content" : "Hi Rohit, The host controls when to enable and disable cell balancing on each cell. Matt" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ76940" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900166.json b/data/json/DLP/900166.json new file mode 100644 index 0000000000000000000000000000000000000000..37d017a20936ab96e950292e29227b6102fa102f --- /dev/null +++ b/data/json/DLP/900166.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900166", + "reporterName" : "Nikos Antoniou", + "rankPoints" : "310", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ25505: Choosing vibration element", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 19", + "queryText" : "Part Number: BQ25505 Hi everyone, We are designing a smart insole and we are willing to integrate energy harvesting (through step foot) as an auxiliary charging system. We have chosen the bq25505 charger and now we are investigating for vibration elements. We are looking for piezoelectric modules. Do you have to suggest as any piezoelectric module for our application that would be compatible with bq25505? As I mentioned this is going to be just an auxiliary charging system and we're not looking to cover our full power load. Thanks in advance Nick", + "partNumber" : " BQ25505", + "allResponseList" : [ { + "contentId" : "3328139", + "userName" : "Jeff F", + "rankPoints" : "88360", + "rankName" : "Guru", + "date" : "Apr 26, 2020 8:03 PM", + "userId" : "8433", + "content" : "Hi Nick, Unfortunately, I do not have a specific vibration element. Keep in mind the charger must always boost so the VMPP << VBAT_OV<5.5Vmax. You will likely have to use a zener clamp on the element to protect the BQ25505 input. Regards, Jeff" + }, { + "contentId" : "3328581", + "userName" : "Nikos Antoniou", + "rankPoints" : "310", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 10:18 AM", + "userId" : "6003360", + "content" : "Hi jeff, First of all, thank you for your response!! However, I have some additional questions. 1. What you mean \"charger must always boost\"? 2. VMPP is the VOC_SAMP isn't it? 3. How did you choose Rsumoc = 20MΩ? 4. How did you choose VREF_SAMP = 0.14V? Thanks in advance Nick" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25505" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900169.json b/data/json/DLP/900169.json new file mode 100644 index 0000000000000000000000000000000000000000..6c02fa7fd2e4cc59e9928b12fbefc294e22431ae --- /dev/null +++ b/data/json/DLP/900169.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900169", + "reporterName" : "user6248656", + "rankPoints" : "180", + "resolutionStatus" : "", + "ticketName" : "AWR2243: How to make TXBF work correctly?", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 39", + "queryText" : "Part Number: AWR2243 Hi， I am using TXBF usecase in 2243 cascade and encountered difficulties. 1. The phase calibration of Tx and Rx arrays does not seem to be stable. The results of two times of phase calibration have great variation. As I think, the phase difference compared with the reference antenna( usually the first one) should be a certain value. Does that right? How to get the actual phase mismatch value stably? 2. According to the technical documentation\"tiduen5-Imaging Radar Using Cascaded mmWave Sensor\", the four devices or sensors in 2243 cascade is named of Master1, Slave2, Slave3, Slave4. Does the data is captured and arranged as the same order? Or arranged in the order of Slave4, Master1, Slave3, Slave2, which is from left to right on the board? This is very important and it seems better when I change the order as follow, because the DBF algorithm is done from the left antenna RX13 to the right antenna RX8. /* the original code inside AlgorithmFxn_RadarDspPhaseCorrect_Four() in the file named radarDspTxBeamForm.c */ inputAddr1 = (UInt32)&inputBuf[0][offsetIdx] + offsetIn; inputAddr2 = (UInt32)&inputBuf[1][offsetIdx] + offsetIn; inputAddr3 = (UInt32)&inputBuf[2][offsetIdx] + offsetIn; inputAddr4 = (UInt32)&inputBuf[3][offsetIdx] + offsetIn; /*the change I made */ inputAddr1 = (UInt32)&inputBuf[3][offsetIdx] + offsetIn; inputAddr2 = (UInt32)&inputBuf[0][offsetIdx] + offsetIn; inputAddr3 = (UInt32)&inputBuf[2][offsetIdx] + offsetIn; inputAddr4 = (UInt32)&inputBuf[1][offsetIdx] + offsetIn; 3. The struct rlRfPhaseShiftCfg_t contains follow members: rlUInt8_t tx0PhaseShift; /** * @brief TX1 phase shift definition \\n [b1:0] reserved (set it to 0b00) \\n [b7:2] TX1 phase shift value \\n 1 LSB = 360/2^6 = 5.625 degrees\\n Valid range: 0 to 63 \\n */ rlUInt8_t tx1PhaseShift; /** * @brief TX2 phase shift definition \\n [b1:0] reserved (set it to 0b00) \\n [b7:2] TX2 phase shift value \\n 1 LSB = 360/2^6 = 5.625 degrees\\n Valid range: 0 to 63 \\n */ rlUInt8_t tx2PhaseShift; As the comment said, the b0 and b1 is not used. But I have printed the tx0PhaseShift value inside Chains_ar12xxSetTxPhaseShifter() function in the file named \"chains_common_ar12xx.c\" and found its value just vary from 0 to 63. Does it right? Whether should I do the following opertion: tx1PhaseShift = tx1PhaseShift << 2? 4. The caculation of phase slope inside Chains_ar12xxSetCascadePhaseShifterBeamForm() function in the file named \"chains_common_cascade_ar12xx_config_bf.c\" is as follow: slope1[j][i] = sin(gSweepAngles[i]*PI/180)*j* CHAINS_CASCADE_BF_RADAR_NUM_TX_ANTENNA_TI_BOARD_SEPARATION*180; But it seems to be: slope1[j][i] = sin(gSweepAngles[i]*PI/180) * (CHAINS_CASCADE_BF_RADAR_NUM_TX_ANTENNA_TI_BOARD - 1 - j) * CHAINS_CASCADE_BF_RADAR_NUM_TX_ANTENNA_TI_BOARD_SEPARATION*180; Because Tx4 is the first used TX antenna, not the Tx12. Am I right? Your rapid reply is greatly appreciated. Best regards, Wallace", + "partNumber" : " AWR2243", + "allResponseList" : [ { + "contentId" : "3327838", + "userName" : "Cesar", + "rankPoints" : "52960", + "rankName" : "Guru", + "date" : "Apr 25, 2020 11:21 AM", + "userId" : "20288", + "content" : "Hi We are in the process of providing more collateral for cascade calibration. We may be able to provide you some information before this is released. We will get back to you early next week. Thank you Cesar" + }, { + "contentId" : "3327985", + "userName" : "user6248656", + "rankPoints" : "180", + "rankName" : "Prodigy", + "date" : "Apr 26, 2020 6:31 AM", + "userId" : "6248656", + "content" : "Hi, Cesar It is exciting to hear that. Our project is stucked by these problems so we are just waiting for your reply. Thank you very much. Regards, Wallace" + } ], + "tags" : [ "/support/sensors/f/1023/tags/AWR2243" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900175.json b/data/json/DLP/900175.json new file mode 100644 index 0000000000000000000000000000000000000000..f017f44f00062f8b6fdd9dc3545d7fdda90df590 --- /dev/null +++ b/data/json/DLP/900175.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900175", + "reporterName" : "David Smedberg", + "rankPoints" : "30", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC28730: Does not switch as expected, too low output voltage", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 18", + "queryText" : "Part Number: UCC28730 Hello, Im trying to implement UCC28730 into a design. The input voltage should be 270 Vdc - 600 Vdc and output should be 24 Vdc. Im currently using the MOSFET C2M0280120 and the WA8759-al transformer. I have followed the calculation formulas in the UCC28730 datasheet, but still won't get the right output voltage or expected switching characteristics. Below are some photos on the circuity, scope on the gate of the MOSFET Any help on what could solve my problems here would be great. Best regards, David", + "partNumber" : " UCC28730", + "allResponseList" : [ { + "contentId" : "3327884", + "userName" : "David Smedberg", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 25, 2020 6:15 PM", + "userId" : "6315164", + "content" : "Considering the layout guidelines on the datasheet, I soldered the parts together like this: and got these results: Gate on mosfet: Source on mosfet: AUX1: VDD on UCC28730: Secondary side: Is this right behaviour? When I loaded the secondary side the MOSFET started switching faster. After this the circuit spontaneously failed and I think it was the UCC28730 that broke. When powered on VDD is now 0 V." + }, { + "contentId" : "3329355", + "userName" : "Mike O'", + "rankPoints" : "27215", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 6:56 PM", + "userId" : "10947", + "content" : "Hello, Most likely you are shutting down due to a fault. One thing I would recommend is moving away from a TVS switch node clamp. I would recommend and RCD clamp on the switch node. Just put a 511K ohm and 1 nF capacitor across the 3 170V diodes. This should help reduce ringing. This design if you are not using the UCC24650 wake up chip will require at least 2 to 3 ma of preloading to keep in regulation under no load condition. You can just use a resistor for this on the output. Double check your transformer polarity to make sure it is correct for a flyback converter. The UCC28730 is trying to startup and it is given 3 gate pulses and it is not starting up due to the following. Input voltage is too low input under voltage Output voltage is to high triggering over voltage protection. Over current protection. The data sheet describes when fault conditions occur. You are correct that using a proto board to wire you power supply is not a good idea. You also appear to be using wire wound resistors. I would avoid doing that as well because they have large inductance. If they are low inductance you should be fine. I do have some recommendations for you. 1. Order the UCC28730 evaluation module so you can evaluate the power supply operation. The following link will get to the User's guide. /lit/ug/sluub75/sluub75.pdf?ts=1588013518855 2. Their is an application for troubleshooting PSR flyback converter at the following link that you may also find helpful. Regards," + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC28730" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900183.json b/data/json/DLP/900183.json new file mode 100644 index 0000000000000000000000000000000000000000..c56cc5d52ce9eb824733e23ed3fe3efec5da4ac2 --- /dev/null +++ b/data/json/DLP/900183.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900183", + "reporterName" : "daniel Kim", + "rankPoints" : "320", + "resolutionStatus" : "Resolved", + "ticketName" : "AWR2243: AWR2243 can supply to use the measure the distance?", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 17", + "queryText" : "Part Number: AWR2243 Hi Our application is not an automobile. We use this ic to the industrial measuring system. If our application is not automotive, we can't receive this IC? We have to measure the distance up to 220 ~ 350M. Is it possible? Safe Stay!", + "partNumber" : " AWR2243", + "allResponseList" : [ { + "contentId" : "3328563", + "userName" : "Jitendra Gupta", + "rankPoints" : "33995", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 9:58 AM", + "userId" : "1717369", + "content" : "This IC can be used non-automotive area as well. But that depends on the usecase and its requirement for safety or non-safety compliances. AWR2243BOOST can get the object around 180-245m and depends on the type of object (truck/car/human etc). Again max range can be enhanced further by using a high gain antenna. Regards, Jitendra" + } ], + "tags" : [ "/support/sensors/f/1023/tags/AWR2243", "/support/sensors/f/1023/tags/awr20_5F00_p2_5F00_hwa20_5F00_antenna" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900184.json b/data/json/DLP/900184.json new file mode 100644 index 0000000000000000000000000000000000000000..0dc1426a5f4ac4642107edf367f415d2b078d5ed --- /dev/null +++ b/data/json/DLP/900184.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900184", + "reporterName" : "daniel Kim", + "rankPoints" : "320", + "resolutionStatus" : "Resolved", + "ticketName" : "AWR2243: 1Tx, 1Rx antenna can be used?", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 17", + "queryText" : "Part Number: AWR2243 HI One more question. To make narrow-angle, we will design the antenna by 1Tx, 1Rx. This antenna can be applied to the AWR2243? Stay Safe!", + "partNumber" : " AWR2243", + "allResponseList" : [ { + "contentId" : "3328648", + "userName" : "Vivek Dham", + "rankPoints" : "30420", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 11:46 AM", + "userId" : "333578", + "content" : "Hello Daniel, 1Tx, 1Rx configuration could be done in 2243. But in this case there will be no angle estimation possible. Regards, Vivek" + } ], + "tags" : [ "/support/sensors/f/1023/tags/AWR2243", "/support/sensors/f/1023/tags/awr20_5F00_p2_5F00_hwa20_5F00_antenna" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900187.json b/data/json/DLP/900187.json new file mode 100644 index 0000000000000000000000000000000000000000..4e269a65b807bf24e1df9863bfb1ca9b3a400de8 --- /dev/null +++ b/data/json/DLP/900187.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "900187", + "reporterName" : "Troyson Li", + "rankPoints" : "2040", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM3630A: Why the inductance exists whistle ?", + "rankName" : "Expert", + "replies" : " 5", + "views" : " 33", + "queryText" : "Part Number: LM3630A Hicompany team, My customer used LM3630A for Led driver . The Vin of LM3630A in their borad is 3.6V-4.3V and the number of led which maxium current is 10mA is 8. They found that the inductance exists whistle once the led lights. We will be appreciate ifcompany can help us to solve the whistle issue . Thank you! By the way. The following picture is their schematic.", + "partNumber" : " LM3630A", + "allResponseList" : [ { + "contentId" : "3327922", + "userName" : "Sean Zhou", + "rankPoints" : "17030", + "rankName" : "Genius", + "date" : "Apr 26, 2020 1:22 AM", + "userId" : "3704", + "content" : "Hi Troyson, For your schematic, you have floated the \"PWM\" pin? How to achieve dimming? You need to connect the\"PWM\" pin to achieve the current dimming. ( Or connect the \"PWM\" pin to a high level) Are you toggling the \"HW_EN\" pin? And since you just use one channel, have you disabled another channel? BR Sean" + }, { + "contentId" : "3328486", + "userName" : "Troyson Li", + "rankPoints" : "2040", + "rankName" : "Expert", + "date" : "Apr 27, 2020 8:30 AM", + "userId" : "5985182", + "content" : "Hi Troyson, For your schematic, you have floated the \"PWM\" pin? How to achieve dimming? You need to connect the\"PWM\" pin to achieve the current dimming. ( Or connect the \"PWM\" pin to a high level) The dimming is controlled by I2C(Register_. Brightness A) Are you toggling the \"HW_EN\" pin? Yes.Customer input high level to enable the device . And since you just use one channel, have you disabled another channel? They do not connect the another chanel ,The led2 is floating Besides, we have tesed some waveforms. Hope it's good for you . We can find the frequency in Picture.1 & Picture.1 is <20khz which may cause the sounds Picture.1 The waveform in D3 (Diode)-2 pin Picture.2 The waveform in ILD1 pin Picture.3 The waveform in SW pin Picture.4 The waveform in SW pin Picture.5 The SCH" + }, { + "contentId" : "3328499", + "userName" : "Sean Zhou", + "rankPoints" : "17030", + "rankName" : "Genius", + "date" : "Apr 27, 2020 8:47 AM", + "userId" : "3704", + "content" : "Hi Troyson, Picture 1-3 can't show now and you need to disable the channel two with the regs. reg0x00= 0x84; reg0x01=0x08. And have you read the reg0x0B? this is a fault register that may have some information. BR Sean" + }, { + "contentId" : "3328598", + "userName" : "Troyson Li", + "rankPoints" : "2040", + "rankName" : "Expert", + "date" : "Apr 27, 2020 10:49 AM", + "userId" : "5985182", + "content" : "Hi Sean ， OK. Customer just used LED1.But they enable the 2 led chanel . So If customer float the LED2 pin .The deveice will work abnormally?" + }, { + "contentId" : "3329962", + "userName" : "Sean Zhou", + "rankPoints" : "17030", + "rankName" : "Genius", + "date" : "Apr 28, 2020 6:21 AM", + "userId" : "3704", + "content" : "Hi Troyson, No, it will detect the open led and works abnormally. Please disable the LED2 with regs if they don't use this channel. BR Sean" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM3630A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900188.json b/data/json/DLP/900188.json new file mode 100644 index 0000000000000000000000000000000000000000..8b34b0a8148f2924ed0ab302845e7bd50efd2ea0 --- /dev/null +++ b/data/json/DLP/900188.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900188", + "reporterName" : "alikaan", + "rankPoints" : "810", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "CSD18540Q5B: Looking for pin to pin replacement mosfet like CSD18540Q5B", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 12", + "queryText" : "Part Number: CSD18540Q5B Hi everyone, I'm using NVMTS0D4N04C mosfet for my application, but I need to change this mosfet with pin to pin mosfet. I would like to use the CSD18540Q5B mosfet but it is not pin to pin. If you have similar product, please let me know. Thanks!", + "partNumber" : " CSD18540Q5B", + "allResponseList" : [ { + "contentId" : "3328724", + "userName" : "John Wallace1", + "rankPoints" : "9460", + "rankName" : "Genius", + "date" : "Apr 27, 2020 12:56 PM", + "userId" : "3502056", + "content" : "Hi Ali, Thanks for your interest incompany FETs. Unfortunately, we do not make any FETs in the same 8 x 8mm (POWER 88) package. You would need to change your board layout to accommodate either a 5 x 6mm SON or D2PAK device." + }, { + "contentId" : "3328742", + "userName" : "alikaan", + "rankPoints" : "810", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 1:04 PM", + "userId" : "4863378", + "content" : "Hi John, Thank you for the reply. If you have any part number for pin to pin connection, I would like to use it for my PCB. Then I can change the layout for revision 2. Same footprint is not important for my test." + } ], + "tags" : [ "/support/power-management/f/196/tags/CSD18540Q5B" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900195.json b/data/json/DLP/900195.json new file mode 100644 index 0000000000000000000000000000000000000000..629a752157294ab1fa66eadcd4463040e45dff7c --- /dev/null +++ b/data/json/DLP/900195.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "900195", + "reporterName" : "Pablo Liberman", + "rankPoints" : "120", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS61027: Is pin FB exposed in fixed version?", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 28", + "queryText" : "Part Number: TPS61027 Hi, I would like to know if pin 3 (FB) is connected to the internal resistor divider in the 5V fixed version TPS61027. The functional block diagram in page 9 of datasheet only shows the adjustable version. If not connected to the internal resistor divider, could be connected to GND or VOUT? I am designing an intrinsically safe sensor so I need to be sure that the IC never exceeds 5V. Thanks!", + "partNumber" : " TPS61027", + "allResponseList" : [ { + "contentId" : "3327909", + "userName" : "Jasper Li", + "rankPoints" : "37445", + "rankName" : "Mastermind", + "date" : "Apr 25, 2020 11:31 PM", + "userId" : "3706612", + "content" : "Hi Pablo, the FB should be floating in fixed version device. and the internal feedback resistor set the output to 5V. what is the input/output in your application? the TPS61027 is quite old device, maybe there is better solution." + }, { + "contentId" : "3327914", + "userName" : "Pablo Liberman", + "rankPoints" : "120", + "rankName" : "Prodigy", + "date" : "Apr 26, 2020 12:23 AM", + "userId" : "479093", + "content" : "Hi Jasper, Thank you for your promt response. Jasper Li the FB should be floating in fixed version device. and the internal feedback resistor set the output to 5V. Yes, but my question is if the internal feedback resistors is connected to FB pin internally, so if there is a shortcircuit between FB and GND the output voltage will increase. If the FB is unconnected internally, I'll be sure there isn't any failure that could increase the output voltage. Jasper Li what is the input/output in your application? the TPS61027 is quite old device, maybe there is better solution. The requirements are: Voltage Input: 2.3 to 3.7V Voltage Output: 5V Load current: 5mA Fixed frequency (>1Mhz), Low noise PWM mode (no pulse-skip mode or power save mode), anti-ringing, fixed output, low quiescent current. I searched in boost converter section ofcompany website but I couldn't find another converter. Please let me know if you need further information. Best regards, Pablo" + }, { + "contentId" : "3328304", + "userName" : "Jasper Li", + "rankPoints" : "37445", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 5:31 AM", + "userId" : "3706612", + "content" : "Pablo, i need times to check the connection of the FB pin. however, this device is not 1MHz. what about the TPS61253A with 3.8MHz if the BGA package is acceptable. anti-ring is not used in force PWM condition." + }, { + "contentId" : "3329662", + "userName" : "Pablo Liberman", + "rankPoints" : "120", + "rankName" : "Prodigy", + "date" : "Apr 28, 2020 12:18 AM", + "userId" : "479093", + "content" : "Hi Jasper, Thank you for your advice. I think TPS61253A is a good choice for my project. Best regards, Pablo" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS61027", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2bTPS61027" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900196.json b/data/json/DLP/900196.json new file mode 100644 index 0000000000000000000000000000000000000000..119c6bdf1b1e12808ee3c5beb93884c034976d70 --- /dev/null +++ b/data/json/DLP/900196.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900196", + "reporterName" : "user744376", + "rankPoints" : "270", + "resolutionStatus" : "", + "ticketName" : "LMR33620: LMR33620", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 23", + "queryText" : "Part Number: LMR33620 LMR33620 In my design the LMR33620 charge a SuperCapacitor bank thrug a shottky diode. In order to have a precise voltage at the S-Caps the voltage divider sense the voltage directly across the S-Caps. Question: When ther is no voltage applied to the Vin pin of LMR33620 how many mA is allowed as backdrive into the FB pin of the IC ? br Jørgen", + "partNumber" : " LMR33620", + "allResponseList" : [ { + "contentId" : "3327956", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 26, 2020 3:12 AM", + "userId" : "3498075", + "content" : "Hi Jorgen FB pin is high impedance pin which only sink current below uA even DC voltage is applied on FB pin directly. Do NOT apply voltage over -03V~+5.5V range. B R Andy" + }, { + "contentId" : "3327999", + "userName" : "user744376", + "rankPoints" : "270", + "rankName" : "Intellectual", + "date" : "Apr 26, 2020 7:18 AM", + "userId" : "744376", + "content" : "Hi Andy, Thank you for your promt reply. See the attached: SLYA014A - May 2000 Latch-Up, ESD, and Other Phenomena Please if possible contact the Chip Designer and let me know how many mA the that can be accepted into the the FB pin without this result in latch-up or degradation in the chip. BR Jørgen slya014a.pdf" + }, { + "contentId" : "3330035", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 28, 2020 7:33 AM", + "userId" : "3498075", + "content" : "Hi Jorgen, After checking with designer, the FB pin has no latch up issue no matter what VIN pin voltage is (0V--36V range). the FB sink current below uA even it's biased with DC power source directly. B R Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/LMR33620%2bFB%2bbackdrive%2bcurrent", "/support/power-management/f/196/tags/LMR33620" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900199.json b/data/json/DLP/900199.json new file mode 100644 index 0000000000000000000000000000000000000000..37fb957c8f7836b5af2417d95509bf36b521c930 --- /dev/null +++ b/data/json/DLP/900199.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900199", + "reporterName" : "user1387741", + "rankPoints" : "20", + "resolutionStatus" : "Resolved", + "ticketName" : "PGA411-Q1: angle register", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 39", + "queryText" : "Part Number: PGA411-Q1 Hi, I used PGA411-EVM to read DEV_STAT5. I found ORDANGLE bits can only display 0 to 0x3FF, how can GUI display the 0degree to 360degree? Using Equation 11 in datasheet, I can only get 0degree to 90degree. thanks.", + "partNumber" : " PGA411-Q1", + "allResponseList" : [ { + "contentId" : "3327881", + "userName" : "Josh Wyatt", + "rankPoints" : "61360", + "rankName" : "Guru", + "date" : "Apr 25, 2020 5:45 PM", + "userId" : "614", + "content" : "Dear user1387741 - I don't work on this part, but i was curious about your question - it looks to me like if you are getting max 0x3FF from this register (bits 0-9 are 1b), you are/must be in 10bit mode and equation 10 applies, which would give you 359.6484 degrees you would need to be in 12 bit mode to get 0x7FF from this register, then apply equation 11, when in that mode, to get same Check the BMODE0 pin status, if low, then you are in 10-bit mode, if high, then you are in 12 bit mode and someone from this product group will correct me." + }, { + "contentId" : "3328078", + "userName" : "user1387741", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 26, 2020 12:37 PM", + "userId" : "1387741", + "content" : "Hi Josh, Thank you , you are right！ It's OK now." + } ], + "tags" : [ "/support/sensors/f/1023/tags/PGA411_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900200.json b/data/json/DLP/900200.json new file mode 100644 index 0000000000000000000000000000000000000000..cf9b6a933a8e8eb652a8e11801623b819f59a3fa --- /dev/null +++ b/data/json/DLP/900200.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900200", + "reporterName" : "Jason Sylvestre", + "rankPoints" : "260", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS40211-Q1: TPS4021x-Q1 Datasheet Error?", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 13", + "queryText" : "Part Number: TPS40211-Q1 Hello, I'm designing a boost converter similar to the one described in Typical Application 8.2 on page 26 of the datasheet for the TPS40210. I was going through the calculations and am having trouble with Equation 59. When I put this into MATLAB with the typical application numbers, I get 0.2087. I checked with a colleague and he also gets this. Can you verify that this calculation is correct? /lit/ds/symlink/tps40211-q1.pdf?ts=1587768910081 Thanks!", + "partNumber" : " TPS40211-Q1", + "allResponseList" : [ { + "contentId" : "3329312", + "userName" : "Richard Fu22", + "rankPoints" : "2925", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 6:22 PM", + "userId" : "5003147", + "content" : "Hi Jason, Thanks for using the TPS40210. The equation is correct based on the model that output impedance looks like a current source flowing into the output impedance (Rout) in parallel with output capacitor in series with its equivalent resistance (Cout+R_esr). Output impedance looks like [(R_esr+1/(s*C_out)]||R_out]. I think in this design, this could be thought of a scaling factor or through experimental results. Ideally, you would get the value around 0.2 through the equation above, but empirical results will give another value. The equations given here can be thought of as a guideline based on some approximation/model, but will need tweaking or testing in order to produce optimal results. Thanks, Richard" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS40210", "/support/power-management/f/196/tags/TPS40211_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900203.json b/data/json/DLP/900203.json new file mode 100644 index 0000000000000000000000000000000000000000..ca825f25fe5e2ef54fe49fec64df5a9c821dbc64 --- /dev/null +++ b/data/json/DLP/900203.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900203", + "reporterName" : "Ameet Haware", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS786: TPS78601KTTRG3", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 11", + "queryText" : "Part Number: TPS786 I have a basic doubt. Suppose I am using TPS78601KTTRG3 to generate an output of 3.3 V and the voltage at input pin number 2 is connected to a battery of range 4.2 V (Max, when full charge) to 2.8 V (Min). Also 3.3 V is connected to many active ICs whose total current will be 435 mA. My doubt to you is that will the input current (current through pin number 2) be always greater than output current,i.e., 435 mA), when the battery discharges slowly from 4.2 V to 2.8 V. Also note that my EN pin is connected to IN pin. So how much will be the EN current be, when the battery discharges slowly from 4.2 V to 2.8 V. TPS78601KTTRG3", + "partNumber" : " TPS786", + "allResponseList" : [ { + "contentId" : "3329418", + "userName" : "Jason Song", + "rankPoints" : "12645", + "rankName" : "Genius", + "date" : "Apr 27, 2020 7:49 PM", + "userId" : "1505435", + "content" : "Hi Ameet, The UVLO for TPS786 has a maximum value of 2.65V, which means for your Vin at 2.8V, the LDO is on and in dropout. During dropout, the pass-FET switch of the LDO will be on to allow current flowing from Vin to the Vout. You will have some current flowing from Vin to Ground at the same time, so the input current will be higher than your load current during the process that the battery voltage drops from 4.2V to 2.8V. For voltage higher than 1.7V, the EN signal will turn on the part, so the EN will not affect the LDO running in dropout when the input voltage drops to the point it's no longer in regulation. Regards, Jason Song" + } ], + "tags" : [ "/support/power-management/f/196/tags/tps786" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900204.json b/data/json/DLP/900204.json new file mode 100644 index 0000000000000000000000000000000000000000..e3157d821a47eeccdf483744da421c0c54f9f18d --- /dev/null +++ b/data/json/DLP/900204.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900204", + "reporterName" : "Ameet Haware", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS756: TPS75633KTTT", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 11", + "queryText" : "Part Number: TPS756 I have a basic doubt. Suppose I am using TPS75633KTTT to generate an output of 3.3 V and the voltage at input pin number 2 is connected to a battery of range 4.2 V (Max, when full charge) to 2.8 V (Min). Also 3.3 V is connected to many active ICs whose total current will be 1.173 A. My doubt to you is that will the input current (current through pin number 2) be always greater than output current,i.e., 1.173 A), when the battery discharges slowly from 4.2 V to 2.8 V. Also note that my EN pin is connected to IN pin. So how much will be the EN current be, when the battery discharges slowly from 4.2 V to 2.8 V.", + "partNumber" : " TPS756", + "allResponseList" : [ { + "contentId" : "3329414", + "userName" : "Jason Song", + "rankPoints" : "12645", + "rankName" : "Genius", + "date" : "Apr 27, 2020 7:48 PM", + "userId" : "1505435", + "content" : "Hi Ameet, The UVLO for TPS756 has a maximum value of 2.75V, which means for your Vin at 2.8V, the LDO is on and in dropout. During dropout, the pass-FET switch of the LDO will be on to allow current flowing from Vin to the Vout. You will have some current flowing from Vin to Ground at the same time, so the input current will be higher than your load current during the process that the battery voltage drops from 4.2V to 2.8V. For voltage higher than 2V, the EN signal will turn on the part, so the EN will not affect the LDO running in dropout when the input voltage drops to the point it's no longer in regulation. Regards, Jason Song" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS756" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900207.json b/data/json/DLP/900207.json new file mode 100644 index 0000000000000000000000000000000000000000..2d63722386c253b3b90c35af962c9232fce51d6a --- /dev/null +++ b/data/json/DLP/900207.json @@ -0,0 +1,15 @@ +{ + "ticketNumber" : "900207", + "reporterName" : "Shaokai Lin", + "rankPoints" : "30", + "resolutionStatus" : "", + "ticketName" : "DCA1000EVM: mmWave Studio Phase Stability Calculation", + "rankName" : "Prodigy", + "replies" : " 0", + "views" : " 11", + "queryText" : "Part Number: DCA1000EVM Hi everyone, I am currently using mmWave Studio to collect ADC samples using IWR1443Boost & DCA1000EVM. In the postprocessing step, I notice that there is a \"Phase Stability\" graph generated by the Matlab script. I am wondering how the phase stability is calculated in this case? Why is it measured at a particular distance? As I am trying to process the raw ADC samples in a similar way, it would be tremendously helpful if you can kindly give me some pointers to replicate this process. Thanks! Shaokai", + "partNumber" : " DCA1000EVM", + "allResponseList" : [ ], + "tags" : [ "/support/sensors/f/1023/tags/DCA1000EVM", "/support/sensors/f/1023/tags/IWR1443BOOST" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900212.json b/data/json/DLP/900212.json new file mode 100644 index 0000000000000000000000000000000000000000..5581d2027fd28a014a7a7ac2c6d62b503c28decd --- /dev/null +++ b/data/json/DLP/900212.json @@ -0,0 +1,95 @@ +{ + "ticketNumber" : "900212", + "reporterName" : "Brandon Biodrowski", + "rankPoints" : "60", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LP8553: LP8553: Issues with Low Input Voltage application", + "rankName" : "Prodigy", + "replies" : " 10", + "views" : " 53", + "queryText" : "Part Number: LP8553 I have my circuit connected in the same way as the Typical Application for Low Input Voltage on Page 2 of the datasheet as I am using 5V input on Vbatt, Vin, Vldo. I have a 160Hz PWM input to the PWM input pin. However, I am seeing an UVLO fault in register 02h as bit 0 is set to 1. I have not changed any default settings. The output voltage shows 10.1V, current is at about 140mA (shown from power supply), but there is no output PWM through the LED string. Are there any settings I have to set in the EEPROM or other registers to get the low input voltage application to function? Any ideas as to why the LEDs aren't turned on?", + "partNumber" : " LP8553", + "allResponseList" : [ { + "contentId" : "3327925", + "userName" : "Sean Zhou", + "rankPoints" : "17030", + "rankName" : "Genius", + "date" : "Apr 26, 2020 1:32 AM", + "userId" : "3704", + "content" : "Hi Brandon, For the VLDO, you need to connect a cap to ground, but you have connected to the \"Vin\" this LDO is internal output, please modify the schematic and try again. BR Sean" + }, { + "contentId" : "3328021", + "userName" : "Brandon Biodrowski", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 26, 2020 8:09 AM", + "userId" : "6280728", + "content" : "In the datasheet in shows connecting the VLDO to Vin as I have in my schematic. Since VBATT is 5V in my schematic, I connected VLDO & VIN together to VBATT." + }, { + "contentId" : "3328038", + "userName" : "Sean Zhou", + "rankPoints" : "17030", + "rankName" : "Genius", + "date" : "Apr 26, 2020 8:47 AM", + "userId" : "3704", + "content" : "Hi Sir, Yes, that is ok, but you can try with a higher input voltage source and check the fault regs since you have a UVLO fault now, And when you try with higher supply voltage, please don't connect the “VLDO\" pin to Vin. BR Sean" + }, { + "contentId" : "3328158", + "userName" : "Brandon Biodrowski", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 26, 2020 10:29 PM", + "userId" : "6280728", + "content" : "Okay so essentially you're asking me to connect the chip in the same way as shown here?" + }, { + "contentId" : "3328160", + "userName" : "Brandon Biodrowski", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 26, 2020 10:36 PM", + "userId" : "6280728", + "content" : "Also, do I need to connect a 5V source to VLDO (with a cap to ground)?" + }, { + "contentId" : "3328193", + "userName" : "Sean Zhou", + "rankPoints" : "17030", + "rankName" : "Genius", + "date" : "Apr 27, 2020 1:09 AM", + "userId" : "3704", + "content" : "Hi Sir, Yes, please try with a higher input voltage, and since the supply voltage will exceed 5V, so don't connect the \"VLDO\" to the \"Vin\" and just connect a cap between \"VLDO\" and ground. BR Sean" + }, { + "contentId" : "3328275", + "userName" : "Brandon Biodrowski", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 4:44 AM", + "userId" : "6280728", + "content" : "Why does the data sheet show 5V on the VLDO pin? Does that indicate that the VLDO pin outputs 5V?" + }, { + "contentId" : "3328295", + "userName" : "Sean Zhou", + "rankPoints" : "17030", + "rankName" : "Genius", + "date" : "Apr 27, 2020 5:18 AM", + "userId" : "3704", + "content" : "Yes, you are correct, this is an internal LDO which output 5V for internal power supply. BR Sean" + }, { + "contentId" : "3329678", + "userName" : "Brandon Biodrowski", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 28, 2020 12:38 AM", + "userId" : "6280728", + "content" : "Hi, I am still in process of having my boards modded to try and separate VLDO and VIN. However, this would still not solve my problem in that I only have 5V available to power this driver. Would there be any other reasons my schematic could have issues?" + }, { + "contentId" : "3329947", + "userName" : "Sean Zhou", + "rankPoints" : "17030", + "rankName" : "Genius", + "date" : "Apr 28, 2020 5:57 AM", + "userId" : "3704", + "content" : "Hi Brandon, Since the problem is UVLO, you need to increase the power supply voltage or you need to decrease the LED counts or decrease the output current. BR Sean" + } ], + "tags" : [ "/support/power-management/f/196/tags/LP8553" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900213.json b/data/json/DLP/900213.json new file mode 100644 index 0000000000000000000000000000000000000000..642cef0a57174606b76152ae8fe66c4ce0daf207 --- /dev/null +++ b/data/json/DLP/900213.json @@ -0,0 +1,79 @@ +{ + "ticketNumber" : "900213", + "reporterName" : "Andrei Marinescu", + "rankPoints" : "80", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS549B22: Reference Voltage Programming", + "rankName" : "Prodigy", + "replies" : " 8", + "views" : " 38", + "queryText" : "Part Number: TPS549B22 Hi, I need to program the TPS549B22's reference voltage to 0.75000V using the PMBUS (USB Interface Adapter) and the Fusion Digital Power Designer software. I cannot find the reference voltage selection on the software. Thanks", + "partNumber" : " TPS549B22", + "allResponseList" : [ { + "contentId" : "3329158", + "userName" : "Anthony F", + "rankPoints" : "30845", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 4:41 PM", + "userId" : "1559531", + "content" : "Hi Andrei, For the TPS549B22, the VOUT_COMMAND command should be used to program the reference voltage. This has a max of 1.2V, like when configuring with VSEL, so an external resistor divider is required for higher output voltages. Let me know if you have any further questions. Anthony" + }, { + "contentId" : "3329233", + "userName" : "Andrei Marinescu", + "rankPoints" : "80", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 5:22 PM", + "userId" : "6201335", + "content" : "Hi Anthony, I am using the TPS549B22EVM development board. I swapped out the sensing resistors on the board with a 10kOhm and 15kOhm resistor and set the reference voltage (VOUT_COMMAND) to 0.75000V. According to the datasheet, this should output 1.25V. Unfortunately, the output voltage is identical to the reference voltage (VOUT_COMMAND). Here is my understanding of the RSP/RSN Remote Sensing Functionality: The TPS549B22 uses TI's D-CAP3 control mode, which is a variation of Constant On-Time (COT) control. The TPS549B22 will adjust its operating frequency to attempt to regulate the voltage between the Remote Sense Positive pin (RSP) and the Remote Sense Negative pin (RSN) to be equal to the internal reference voltage (which is set through an external voltage divider connected to the VSEL pin of the TPS549B22). See Figure 30. The resistor ratio is R1 / R2 = (Vout/Vref - 1) where R1 is the resistor from VOSNS to RSP and R2 is the resistor from RSP to RSN. Using Table 2 (Page 20) of the TPS549B22 datasheet, I set the reference voltage (VOUT_COMMAND) to 0.75000V and physically swapped out the resistors to output 1.25V. With a reference voltage of 0.75000V, R1 = 10kOhm and R2 = 15kOhm. Thank you for your help." + }, { + "contentId" : "3329264", + "userName" : "Peter James Miller", + "rankPoints" : "19805", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 5:39 PM", + "userId" : "8518", + "content" : "Andrei Marinescu The TPS549B22EVM-847 Users Guide contains details of using the FUSION GUI with the TPS549B22 and the TP549B22EVM-847 evaluation board. /lit/ug/sluubn2/sluubn2.pdf#page=22 Figure 24 on page 23 shows the \"All Config\" tab of the Configuration page. First, select \"Configuration on the lower left of the screen\" The Reference voltage is programmed through PMBus via the VOUT_COMMAND. Since the TPS549B22 does not support the command VOUT_SCALE_LOOP, the user will need to program the desired reference voltage into the VOUT_COMMAND value. Note: The VSEL pin-strapping will override the VOUT_COMMAND value stored in NVM by the STORE_DEFAULT_ALL command unless one of the 4 0.975V options are selected. I would recommend using either the \"OPEN\" (pin pulled to BP) or SHORT (Pin shorted to ground) options, depending on the fault response option desired, Hiccup or Latch-Off. See Datasheet page 20 /lit/ds/symlink/tps549b22.pdf#page=20 for more details." + }, { + "contentId" : "3329281", + "userName" : "Peter James Miller", + "rankPoints" : "19805", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 5:50 PM", + "userId" : "8518", + "content" : "Andrei Marinescu If you attempted to change the resistor divider to VOSNS to RSP = 10k Ohms and RSP to RSN = 15k Ohms, and the output voltage is directly tracking the reference voltage of 0.75V instead of 1.25V, either the RSP to RSN connection is open, or the VOSNS to RSP resistor is shorted. The schematic is on page 6 /lit/ug/sluubn2/sluubn2.pdf#page=6 Change R10 to 15kOhms and R8 to 10kOhms. I know it's a little complicated in there with the extra components to allow for D-CAP mode with RCC injection, so double check the resistor placement." + }, { + "contentId" : "3329286", + "userName" : "Peter James Miller", + "rankPoints" : "19805", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 5:57 PM", + "userId" : "8518", + "content" : "Andrei Marinescu Here is the location of R15 and R8 on the PCB:" + }, { + "contentId" : "3329324", + "userName" : "Andrei Marinescu", + "rankPoints" : "80", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 6:30 PM", + "userId" : "6201335", + "content" : "Hi Peter, I replaced R8 with a 10kOhm resistor and R15 with a 15kOhm resistor. I also desoldered R23 and left the circuit OPEN as shown in Table 2. I set VOUT_COMMAND to 0.75000V, but the development board is still outputting the same voltage as VOUT_COMMAND. The only thing I am unsure about is the resistance across R15. When I check the resistance of R15 it reads between 6-12kOhm even though it is a 15kOhm resistor. Is this my problem? Thanks for your help." + }, { + "contentId" : "3329512", + "userName" : "Peter James Miller", + "rankPoints" : "19805", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 9:09 PM", + "userId" : "8518", + "content" : "Andrei Marinescu Measuring the resistance of R8 or R15 in circuit is going to be problematic because there is enough capacitance in Cout to look like a short circuit to many Ohm-meters, so you're likely to measure R8 and R18 in parallel when you measurement them in-circuit. If the output voltage you are measuring is equal to VOUT_COMMAND, then it is likely that one of the resistors is not corrected correctly. Turn the output on, measure VOUT with your volt meter, then measure the voltage across R15 and the voltage across R8. If the divider is set-up correctly the voltage drop across R15 should be equal to the VOUT_COMMAND value and the voltage drop across R8 should be equal to 2/3 of that (R8 / R15 = 10/15 = 2/3). If the voltage drop across R8 is near 0V, then check to see if the pads for C31, C32, or C36 are shorted out and let me know what the results are." + }, { + "contentId" : "3329589", + "userName" : "Andrei Marinescu", + "rankPoints" : "80", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 10:45 PM", + "userId" : "6201335", + "content" : "When I try to measure the voltage across these resistors, the output goes to 0V. Once the power supply is 0V, it does not return to the 0.75000V until I power the board off and on again." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS549B22" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900216.json b/data/json/DLP/900216.json new file mode 100644 index 0000000000000000000000000000000000000000..0b179f4b36f03ddb32e2dc3d24fec2db81998f38 --- /dev/null +++ b/data/json/DLP/900216.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900216", + "reporterName" : "6332797", + "rankPoints" : "10", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "Lost of 3D sync using DLP-Link on a laser projector", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 37", + "queryText" : "I'm having problems locking to a 3D movie image with active 3D glasses (XPAND & Ultra-clear DLP glasses) and a blue laser projector using RGBY wheel. I tried to find help info on DLP-Link, but find that this mode is proprietary with TI. Projector produces correct double image (left & right eye mixed) on screen, but glasses drift in sync about every 4-5 minutes. I'm wondering about the DLP white flash might be from the \"Y\" part of the wheel and there may need to be a color filter over the sensor in the glasses. illumination from the projector is between 3500 to 4000 lumens onto a 8 foot wide screen in 1920x1080 resolution. Previous projector before the upgrade to a laser model worked fine in 3D with a RGBCMY wheel, but was only 1200 to 1800 lumens. Any ideas to solve this problem? Please advise.", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3327966", + "userName" : "Gary S", + "rankPoints" : "670", + "rankName" : "Prodigy", + "date" : "Apr 26, 2020 4:26 AM", + "userId" : "1571137", + "content" : "I am not aware of any particular color sensitivity in any DLP® Link(TM) glasses. There isn't any reason that they should have a sensitivity to yellow. DLP Link is not color dependent. DLP Link pulses are typically red or blue, although they can be any color. I would not expect yellow to be a problem. If you want to know more about how it works, please see this post; there is a reference there to details on DLP link. /support/dlp/f/94/t/663116 . Hopefully that is helpful. - Gary" + } ], + "tags" : [ ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900218.json b/data/json/DLP/900218.json new file mode 100644 index 0000000000000000000000000000000000000000..1f0449feba771589c70f4650f8ea9b7809e2676a --- /dev/null +++ b/data/json/DLP/900218.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900218", + "reporterName" : "John LaGreca1", + "rankPoints" : "35", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ28Z610: Unable to write MAC 0x004C Manufacturer Name", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 17", + "queryText" : "Part Number: BQ28Z610 I am able to write to the Serial Number MAC (0x004E) successfully, but am unable to use the same procedure to write to the Manufacturer Name MAC (0x004C). Both regs are listed as R/W, available unsealed, the device is unsealed however. Successful write to 0x004E: Advanced Comm Transaction Log RW Addr Reg Len Data Wr , aa , 3E , 02 , 4E 00 // Set address and read 36 bytes. Rd , aa , 3E , 36 , 4E 00 EA 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 C5 06 Wr , aa , 3E , 04 , 4E 00 EA 03 // Change the 2nd byte of the serial number to 0x03 and write it. Wr , aa , 60 , 02 , C4 06 // Write the checksum and length. Wr , aa , 3E , 02 , 4E 00 // Read back 36 bytes and see the 2nd SNum byte has changed to 0x03. Rd , aa , 3E , 36 , 4E 00 EA 03 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 C4 06 Unsuccessful write to 0x004C: Advanced Comm Transaction Log RW Addr Reg Len Data Wr , aa , 3E , 02 , 4C 00 // Set address and read 36 bytes. Rd , aa , 3E , 36 , 4C 00 42 30 31 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 10 07 Wr , aa , 3E , 05 , 4C 00 42 32 31 // Change the 2nd byte of the MFG Name to 0x32 and write it. Wr , aa , 60 , 02 , 0E 07 // Write the checksum and length. Wr , aa , 3E , 02 , 4C 00 // Read back 36 bytes and note the 2nd byte has remains at 0x30. Rd , aa , 3E , 36 , 4C 00 42 30 31 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 10 07 Is there something I am missing in the process with respect to writing string vs numeric data? I have tried 21 bytes with no success as well (field is S21).", + "partNumber" : " BQ28Z610", + "allResponseList" : [ { + "contentId" : "3329231", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 5:19 PM", + "userId" : "1864278", + "content" : "Hi John, Try to write to the Manufacturer Name in the data flash directly. The slides below how to update the data flash in detail. BQ28z610 Data Flash - Device Name.pdf Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ28Z610" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900224.json b/data/json/DLP/900224.json new file mode 100644 index 0000000000000000000000000000000000000000..d1b5cf9514316564de4a274274818e2addddbea0 --- /dev/null +++ b/data/json/DLP/900224.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900224", + "reporterName" : "Henrique Reis", + "rankPoints" : "130", + "resolutionStatus" : "", + "ticketName" : "TPS61099: Using the TPS610995DRV with a wide ranging load", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 16", + "queryText" : "Part Number: TPS61099 We are considering the TPS610995DRV to provide 3.6V to a cellular cat-m1 module. The module will ask for 60ma to 250ma during normal operation but may peak to 600mA in small bursts. Also, when we put the cellular module to sleep, it may consume only 10uA....but we still need voltage to be supplied We are supplying the Boost converter with 2.5V (can up that if we need to) We ran some simulations and studied the datasheet but are wondering if this module will be capable of this wide range? To make it work, is there anything we should consider? Thanks.", + "partNumber" : " TPS61099", + "allResponseList" : [ { + "contentId" : "3327976", + "userName" : "Minqiu Xie", + "rankPoints" : "12515", + "rankName" : "Genius", + "date" : "Apr 26, 2020 5:26 AM", + "userId" : "5303427", + "content" : "Hi Henrique: May I check the Vin, Vout, and load condition with you? The heaviest situation is Vin=2.5V, Vout=3.6V, Io=0.6A? Could you accept if Vout drops with 600mA load?" + }, { + "contentId" : "3328092", + "userName" : "Henrique Reis", + "rankPoints" : "130", + "rankName" : "Prodigy", + "date" : "Apr 26, 2020 1:58 PM", + "userId" : "5275426", + "content" : "No that’s too much unfortunately. Is there another product that’s more suitable?" + }, { + "contentId" : "3328269", + "userName" : "Minqiu Xie", + "rankPoints" : "12515", + "rankName" : "Genius", + "date" : "Apr 27, 2020 4:27 AM", + "userId" : "5303427", + "content" : "Hi Henrique: TPS61099x can supoort your normal load as 3.6V/250mA, but hard to support 600mA with Vin=2.5V. I'll suggest TPS61023 to cover the heavry loading." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS61099" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900225.json b/data/json/DLP/900225.json new file mode 100644 index 0000000000000000000000000000000000000000..ff61efeacc2ca0e9b716b016971f1c193a1037fb --- /dev/null +++ b/data/json/DLP/900225.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900225", + "reporterName" : "Ahanu Banerjee", + "rankPoints" : "20", + "resolutionStatus" : "Resolved", + "ticketName" : "LMP91000: Glucose sensor", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 20", + "queryText" : "Part Number: LMP91000 Hi, I am designing circuitry for a 2-electrode glucose sensor requiring bias voltage around 600mV with current typically between 2-10 nA. Measurements are conducted with DC amperometry. I am evaluating whether LMP91000 would be an appropriate choice for the potentiostat. On page 5 of the LMP91000 datasheet, \"minimum operating current capability\" ICE is listed as 750µA and further states \"At such currents no accuracy of the output voltage can be expected\". For some reason, I am having trouble understanding the meaning of this. Can you please clarify its significance and if it precludes the suitability of this AFE for my design? Thank you!", + "partNumber" : " LMP91000", + "allResponseList" : [ { + "contentId" : "3328784", + "userName" : "Gordon Varney", + "rankPoints" : "3740", + "rankName" : "Expert", + "date" : "Apr 27, 2020 1:30 PM", + "userId" : "1059916", + "content" : "Ahanu, When reading the data sheet be a little more through and read the description about how the device works. The statement \"At such currents no accuracy of the output voltage can be expected\" is a note attached to the charge current of 10mA. This means that when first charging your sensor the max current may reach 10mA. The charge bias voltage cannot be controlled if max charge current is reached. The bias voltage will be ramping as if it were in current mode. Once your sensor is charged (powered up) the current will drop below 10mA and the bias voltage will return to normal. The ICE can operate between –750 μA ≤ICE ≤ 750 μA. You should not have any problems with your sensor working on the LMP91000." + }, { + "contentId" : "3329758", + "userName" : "Ahanu Banerjee", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 28, 2020 2:11 AM", + "userId" : "1714154", + "content" : "Gordon, Thank you for that clarification. I had, in fact, misread the datasheet. Warm regards, -Ahanu" + } ], + "tags" : [ "/support/sensors/f/1023/tags/glucose%2bsensor", "/support/sensors/f/1023/tags/Glucometer", "/support/sensors/f/1023/tags/LMP91000" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900227.json b/data/json/DLP/900227.json new file mode 100644 index 0000000000000000000000000000000000000000..58ede750ab65800d0f46174a7379febbf6a0e0ac --- /dev/null +++ b/data/json/DLP/900227.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900227", + "reporterName" : "Emma Wang_DELL EMC", + "rankPoints" : "655", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "CCS/BQ40Z60: lifetime RTL RTH unit", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 10", + "queryText" : "Part Number: BQ40Z60 Tool/software: Code Composer Studio 1, STL and STH unit in sluuao4d is 2 hours. But in .gg file, STL and STH unit in dataflash lifetime section is h. Could you help check which one is right?5707.7_19_6_3 version.gg.csv Is STL and STH unit 2h or h? Thanks!", + "partNumber" : " BQ40Z60", + "allResponseList" : [ { + "contentId" : "3328861", + "userName" : "Damian Lewis", + "rankPoints" : "33210", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 2:10 PM", + "userId" : "69960", + "content" : "Hello Emma, The native unit is 2h. I will check why the gg.csv file displays unit in h." + }, { + "contentId" : "3329457", + "userName" : "Damian Lewis", + "rankPoints" : "33210", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 8:24 PM", + "userId" : "69960", + "content" : "Hello Emma, I was trying to figure out how your gg.csv file has h instead of 2h as the unit. Based on the FW version the unit should be also 2h. It's possible that the gg.csv file was edited. Please export a recent gg.csv yourself to confirm that the unit is 2h." + } ], + "tags" : [ "/support/power-management/f/196/tags/code%2bComposer%2bstudio", "/support/power-management/f/196/tags/bq40z60" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900238.json b/data/json/DLP/900238.json new file mode 100644 index 0000000000000000000000000000000000000000..d0f3180f03d2a36d9ea84adecc19563d6383072d --- /dev/null +++ b/data/json/DLP/900238.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900238", + "reporterName" : "Derlin Chow", + "rankPoints" : "360", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "CCS/DLP4710EVM-LC: How can I use JTAG to upload MSP430 code to DLP4710 EVM-LC", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 33", + "queryText" : "Part Number: DLP4710EVM-LC Tool/software: Code Composer Studio Hi TI, I asked a question a while ago regarding Cypress chip on 4710 EVM-LC can not be detected by GUI and believed the MSP430 code might be corrupted. I bought a JTAG fromcompany and have searched a guide to upload the code using JTAG but could not found a clear clue. Could anyone help me or point me a link? Thanks! Derlin", + "partNumber" : " DLP4710EVM-LC", + "allResponseList" : [ { + "contentId" : "3328017", + "userName" : "Navneet Singh", + "rankPoints" : "4275", + "rankName" : "Expert", + "date" : "Apr 26, 2020 7:59 AM", + "userId" : "4730519", + "content" : "Hi Derlin, You need to install the Code composer studio for building the MSP430 SW code. MSP430 SW is available at evm home page : /tool/DLP4710EVM-LC You can connect MSP430 JTAG programmer to EVM and using code composer tool you can build and download the firmware. Thanks, Navneet If a post answers your question, please click the \"Verify Answer\" button." + }, { + "contentId" : "3328125", + "userName" : "Derlin Chow", + "rankPoints" : "360", + "rankName" : "Intellectual", + "date" : "Apr 26, 2020 5:27 PM", + "userId" : "4365459", + "content" : "Hi Navneet, I already have CCS 8.7 and DLP4710 MSP430 code (PICO-FLA7-PAD3005-TI-EVM-Modify-Devasys) in my computer. But I heard I need to setup JTAG while installing CCS. Is that true? I don't have JTAG experience. Thanks! Derlin" + }, { + "contentId" : "3328804", + "userName" : "Navneet Singh", + "rankPoints" : "4275", + "rankName" : "Expert", + "date" : "Apr 27, 2020 1:40 PM", + "userId" : "4730519", + "content" : "Hi Derlin, You need not to have the JTAG at the time of installation. You can connect the JTAG now with your PC and EVM. Open code composer studio -> import the project in code composer studio from the MSP430 code -> build -> run. Let me know if you see any issue. Thanks, Navneet If a post answers your question, please click the \"Verify Answer\" button." + } ], + "tags" : [ "/support/dlp/f/94/tags/DLP4710EVM_2D00_LC%2b%2bUSB%2bconnection%2bfails_2E00_", "/support/dlp/f/94/tags/DLP4710", "/support/dlp/f/94/tags/code%2bComposer%2bstudio", "/support/dlp/f/94/tags/DLP4710EVM_2D00_LC" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900247.json b/data/json/DLP/900247.json new file mode 100644 index 0000000000000000000000000000000000000000..dbf83e82aaea30d2643ff23b78701e2f630bc41c --- /dev/null +++ b/data/json/DLP/900247.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900247", + "reporterName" : "chunjie wang", + "rankPoints" : "130", + "resolutionStatus" : "", + "ticketName" : "TPS650864: SW2 does not work correctly", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: TPS650864 Dear expert, Months ago, thanks to your help, we found the soldering issue for our TPS650864 evaluation board through this thread /support/power-management/f/196/t/875459. After re-soldering the board, we got the new board. In the test, LDO5V5, and LDO3V3 are both correct. When probing the SW2 output, which is expected to give 0.85V, it seems not to work correctly. The output voltage is not stable, jumping from 0.5V to 4V, back and forth and the total current varies from 0.1A to 0.4A with the input voltage being 12V. And the chip is kind of hot. Due to the SW2 unnormal state, the other power rails have no output. My questions are as follows: 1. What factors may lead to SW2 unnormal state? As a newbie to the TPS650864 chip, any advice is welcome. 2. If we would like to cut off the SW2 and let the other power rails work, how to achieve it? We had a try, in order to make SW1 work, pull high on CTL4 alone, but it does not work. 3. Could you help to check the circuits about SW2 as the following schematic? Thanks ahead", + "partNumber" : " TPS650864", + "allResponseList" : [ { + "contentId" : "3328153", + "userName" : "Kevin LaRosa", + "rankPoints" : "13725", + "rankName" : "Genius", + "date" : "Apr 26, 2020 9:53 PM", + "userId" : "3460140", + "content" : "Hello, The BUCK2 output could be unstable for a few reasons. I will try to list a few as well as a few ways to debug them. I always recommend posting the oscilloscope shots of the output. It it hard to provide any guidance without being able to see the specific behavior ocurring. Make sure it is BUCK2 that is the problem - we have seen many cases where we think it is one regulator when it turns out to be unrelated. Example 1 - I don't think it applies here, but the most common issue we see is that one of the other regulators does not have its proper external components populated and that is causing a power fault that shuts down all regulators. Any time any regulator in the chip has a power fault, the PMIC does emergency shutdown which disables every voltage regulator. So if LDOA1 for example was missing an output cap, that could explain shutting down. It would not lead to BUCK2 > 0.85 V though. Debug steps - take scope shots of the full sequence shown in Figure 6-4 and identify which rail is not powering up as expected. For your case, I would not start here but look at other items first. Example 2 - Another external regulator voltage is leaking onto the FBVOUT2 net. Debug steps - Take a scope shot of the BUCK2 SW2 and FBVOUT2 during start-up. For TPS6508640, this would be after setting CTL3 high. Keep CTL4 low to ensure no other regulators are enabled. If there is voltage on FBVOUT2 before the buck is enabled, or if there is a sudden spike well after start-up, this would suggest an external voltage is backfeeding the PMIC. This is usually through some unexpected path in one of the ICs on the board. Soldering issue - we discussed this in previous thread but if any of the pins are shorted to any of the other pins, abnormal behavior will occur. The CSD87381P has best in class performance due to its unique package, but I've had several EVM builds come back with improper soldering of this FET. Debug steps - when powered off, check the resistance between all of the pin combinations for shorts: DRVL, DRVH, BOOT, SW, FBVOUT, FBGND2 (so check DRVL - DRVH, DRVL - BOOT, DRVL - SW, etc) - it's a lot of tests but it's something the board manufacturer normally does. Current Limit at Low Negative Current - For cases where the voltage is rising above expected value, I typically look at current limit first. The peak current limit also serves as a negative current limit to protect the LS FET from being damaged. For cases where the overall current is fairly low, the negative current limit should be taken into account. It is detailed in Section 6.7.5 Current Limit of the datasheet, near the bottom. Debug steps - remove the ILIM resistor and see if the issues is fixed. If so, increase the ILIM resistance or reduce the ripple current Note: PGNDSNS being connected to the power pad instead of the LS FET GND is a common layout mistake that results in less accurate current limit sensing. Too little capacitance - If there is not sufficient capacitance on the output, even a few pulses of the HS FET can cause significant overshoot. It depends on the inductance as well, but it has been an issue. I think the schematic shows 100 uF which seems fine. I don't like that it is after the 0 ohm resistor though, the FBVOUT may be very noisy. Debug steps - look at the SW node and FBVOUT2 waveform. If a single pulse causes the voltage on the output to jump, then there is probably too little capacitance. Layout - Hard to quantify, but if there is bad Vin or GND connection on the FET or SW to inductor connection, then the regulation could fail. Soldering issues could also be due to incorrect footprints / solder mask, etc. Debug steps - make sure the connections for each of these are very solid Insufficient supply - if any of the input supplies are failing, the regulation will not work Debug steps - check the input voltage to the FET as well as VSYS pin of PMIC and DRV_x_x pin on oscilloscope while observing SWx failing. Good luck and feel free to post updates for us to provide feedback." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS650864" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900248.json b/data/json/DLP/900248.json new file mode 100644 index 0000000000000000000000000000000000000000..738481ce1c8bb3906ae0eb9bee3e1c66862d8239 --- /dev/null +++ b/data/json/DLP/900248.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900248", + "reporterName" : "xu frank", + "rankPoints" : "70", + "resolutionStatus" : "", + "ticketName" : "TPS61220: Unencrypted spice model for TPS61220", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 9", + "queryText" : "Part Number: TPS61220 Dearcompany Team, We are doing a simulation on component basis right now for TPS61220 which is integrated in our end product design. Can you provide unencrypted spice model for TPS61220 that we will use in LTSpice, please? Kind regards Frank", + "partNumber" : " TPS61220", + "allResponseList" : [ { + "contentId" : "3328005", + "userName" : "Minqiu Xie", + "rankPoints" : "12515", + "rankName" : "Genius", + "date" : "Apr 26, 2020 7:29 AM", + "userId" : "5303427", + "content" : "Hi Frank: The TPS61220 unencrypted pspice model is not public till now. Please leave an email here and I'll check if it's available for you." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS61220", "/support/power-management/f/196/tags/power%2bmanagement", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2bDC_2F00_DCconverter", "/support/power-management/f/196/tags/DCDC" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900250.json b/data/json/DLP/900250.json new file mode 100644 index 0000000000000000000000000000000000000000..6c617ab1b16c7affe38ab4d895c3fb00a3f6df7d --- /dev/null +++ b/data/json/DLP/900250.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900250", + "reporterName" : "user4134045", + "rankPoints" : "130", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ40Z50-R2: sleep mode to normal mode configure", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 12", + "queryText" : "Part Number: BQ40Z50-R2 Hello Sir If bq40z50 is configure as \"CHG off DSG on no SBS communication\" during our device's shipping mode to save power. How to change gauge status to normal mode? Need our SW to configure that or plug in AC source can recover to normal mode automatic? Yihung", + "partNumber" : " BQ40Z50-R2", + "allResponseList" : [ { + "contentId" : "3329102", + "userName" : "Damian Lewis", + "rankPoints" : "33210", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 4:10 PM", + "userId" : "69960", + "content" : "Yihung, Unfortunately, to achieve the low power mode the processor and SMBus engine is shutdown. It requires a voltage on PACK pin in order to exit shutdown. You can trying using a switch with current limiting resistor to apply BAT voltage to PACK." + }, { + "contentId" : "3330069", + "userName" : "user4134045", + "rankPoints" : "130", + "rankName" : "Prodigy", + "date" : "Apr 28, 2020 8:04 AM", + "userId" : "4134045", + "content" : "Damian 1. If gauge is in shutdown mode, need apply a battery voltage in PACK pin to wakeup gaue, I think this is what you tell me. 2. For my question, If gauge is in sleep mode, \"CHG off DSG on\" since DSG is on, there should be a battery votlage on PACK pin already, right? In this case, how to configure gauge back to normal mode? 3. In your gauge IC spec, in sleep mode \"CHG off DSG off\" gauge IC still consume 52uA, does this means your processor engine is still alive and consume 52uA? Yihung" + } ], + "tags" : [ "/support/power-management/f/196/tags/bq40z50", "/support/power-management/f/196/tags/BQ40Z50_2D00_R2" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900253.json b/data/json/DLP/900253.json new file mode 100644 index 0000000000000000000000000000000000000000..2d91c04418ccf2def9785a781785899e707f9706 --- /dev/null +++ b/data/json/DLP/900253.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900253", + "reporterName" : "mahesh kumar1", + "rankPoints" : "10", + "resolutionStatus" : "", + "ticketName" : "CSD87501L: Difference Between the TPS65994 and TPS 65988", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 7", + "queryText" : "Part Number: CSD87501L what is the difference between thecompany Power delivery product's 65994 vs 65988 series ? could you share the datasheet of 65994-?", + "partNumber" : " CSD87501L", + "allResponseList" : [ { + "contentId" : "3329540", + "userName" : "Qian Chen", + "rankPoints" : "21370", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 9:40 PM", + "userId" : "1501908", + "content" : "Hi Mahesh, We will check and reply to you. Thanks Qian" + } ], + "tags" : [ "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2bI2C%2b%2b%2b%2b_2300_UCD3138064", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2bfirmware", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2bdatasheet", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2bdebug", "/support/power-management/f/196/tags/CSD87501L", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2b%2bnew%2buser", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2bIoT", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2bHardware%2bTrace%2bAnalyzer", "/support/power-management/f/196/tags/Type%2bC%2bPD", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2b%2bplease%2bhelp", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2bI2C", "/support/power-management/f/196/tags/_2300_%2b%2b%2b%2b%2bImplementation" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900254.json b/data/json/DLP/900254.json new file mode 100644 index 0000000000000000000000000000000000000000..b1eea5c5e645bbdd499a32002788edf8d727b0bb --- /dev/null +++ b/data/json/DLP/900254.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900254", + "reporterName" : "Given Ding", + "rankPoints" : "1660", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS61256A: OVP function", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 10", + "queryText" : "Part Number: TPS61256A Hi Team, Just want to check if TPS61256A has the OVP function. Thanks. BRs Given", + "partNumber" : " TPS61256A", + "allResponseList" : [ { + "contentId" : "3328025", + "userName" : "Zack Liu", + "rankPoints" : "12485", + "rankName" : "Genius", + "date" : "Apr 26, 2020 8:23 AM", + "userId" : "4961181", + "content" : "Hi Given, TPS61256A doesn't have OVP function." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS61256A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900255.json b/data/json/DLP/900255.json new file mode 100644 index 0000000000000000000000000000000000000000..d71fbb4779117f891c483f1e84a6c5cc55f827eb --- /dev/null +++ b/data/json/DLP/900255.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900255", + "reporterName" : "user4134045", + "rankPoints" : "130", + "resolutionStatus" : "", + "ticketName" : "BQ25700A: Low power mode power consumption", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 10", + "queryText" : "Part Number: BQ25700A Hello Sir In spec, page 10, quiescent current, when VBAT = 18 V, REG0x12[15]= 1, in low power mode battery quiescent current is between 22 ~45 μA in page 26, 8.3.8.1 PROCHOT During Low Power Mode During low power mode (REG0x12[15] = 1), the charger offers a low quiescent current (~150 μA) Low power PROCHOT function uses the independent comparator to monitor battery discharge current and system voltage, and assert PROCHOT to CPU. The quiescent current is different in these two description, can you let me know which one is correct? Yihung", + "partNumber" : " BQ25700A", + "allResponseList" : [ { + "contentId" : "3329426", + "userName" : "Tiger Zhou", + "rankPoints" : "610", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 7:54 PM", + "userId" : "1451791", + "content" : "Hi, Yihung, Both are correct. As stated in the test conditions, the first is with all the comparators disabled, while the second is with independent comparator ON." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25700A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900258.json b/data/json/DLP/900258.json new file mode 100644 index 0000000000000000000000000000000000000000..469e430dbbe69b7f06d5f429aa98e4be6e5ac205 --- /dev/null +++ b/data/json/DLP/900258.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900258", + "reporterName" : "Yang Wu", + "rankPoints" : "1360", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS53819A: How does OCP TPS53819A work", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 17", + "queryText" : "Part Number: TPS53819A Hi team, I have a question about the OCP functionality. The DS says \" TPS53819A has cycle-by-cycle overcurrent limiting control. The inductor current is monitored during the OFF state.\" My question is that how the device decides that OCP should be triggered? Or say what's the exact time that the inductor current is monitored? One idea is that, the device will monitor the inductor current during the whole OFF period, the OCP will be triggered only if inductor current of the whole OFF period is larger than OCP trip level. Another idea is the device will monitor the inductor current during the whole OFF period, but the OCP will be triggered only needs the vally point of inductor current is larger than OCP trip level. thanks a lot. Yang", + "partNumber" : " TPS53819A", + "allResponseList" : [ { + "contentId" : "3329303", + "userName" : "Peter James Miller", + "rankPoints" : "19805", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 6:16 PM", + "userId" : "8518", + "content" : "Yang Wu The TPS53819A uses a cycle by cycle, Off-time, valley current limit mechanism that limits the inductor current and places the converter into a constant output current mode until the load current decreases or the output voltage drops sufficiently to trigger the output under voltage protection fault. After an On-time completes, the highside FET turns off and the low-side FET turns on, there are 3 signals gating the start of a new On-time. When all 3 conditions are met, a new on-time starts. 1) Minimum Off-time of 320ns (typ). This ensures enough time for the On-time energy to be reflected on the output voltage and for the current sense on the low-side FET to stabilize. 2) Current Limit programmed by the TRIP pin. The voltage on the SW pin during the on-time is compared to a scaled version of the voltage on the TRIP pin to set the current limit. If the negative voltage on switch pin exceeds the current limit threshold, the Off-time will be extended until the inductor current drops below the current limit, limiting the inductor valley current during the off-time. 3) The Reference Voltage. This generates a new on-time when the output voltage is below the target output voltage as long as the minimum off-time has been met and the inductor current is less than the current limit. OCP is \"triggered\" when Conditions 1 and 3 are met, but Condition 2 is not because the inductor current is still above the Over Current Limit threshold when the reference attempts to trigger a new on-time. So, the current is actually sensed continuously during the low-side FET on-time, but it only affects operation when the inductor current exceeds the current-limit when a new on-time would be created. By extending the off-time to limit the inductor current, the duty cycle is increased, reducing the output voltage until it triggers under-voltage protection. This ensures a smooth transition from D-CAP regulation to pulse by pulse valley current limit while limiting the inductor current to protect against saturation and allowing the output capacitors to help ride through a momentary over-current condition, such as exceeding the current limit during a load-step recovery response." + }, { + "contentId" : "3329796", + "userName" : "Yang Wu", + "rankPoints" : "1360", + "rankName" : "Intellectual", + "date" : "Apr 28, 2020 2:45 AM", + "userId" : "5617579", + "content" : "Hi Peter, Thanks for your detailed reply, it's very clear. One more thing, in the (2) condition, it says \"The voltage on the SW pin during the on-time is compared to a scaled version of the voltage on the TRIP pin to set the current limit\". Do you mean the low-side FET on time? In my opinion, it looks like low-side on-time since it says \"If the negative voltage on switch....\". Thanks a lot. Best regards, Yang" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS53819A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900260.json b/data/json/DLP/900260.json new file mode 100644 index 0000000000000000000000000000000000000000..b86aef345d213a05e44b55a2ff0c4c9a94379805 --- /dev/null +++ b/data/json/DLP/900260.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900260", + "reporterName" : "Wayne Wang20", + "rankPoints" : "2175", + "resolutionStatus" : "", + "ticketName" : "LM25118: Vin current comsumption when Vout is no load", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 9", + "queryText" : "Part Number: LM25118 Hi team, My customer is using LM25118 in a demo board. Input is 8V~14V and output is 12V. When we test the demo in the condition that Vin=14V, Vout=12V without any load, VCCX=0V, EN=H, we found that the current on Vin is about 14mA. In our datasheet, it listed a Vin current of 4.5mA. But the datasheet test condition is no load on LO and HO which is different with customer's test condition. So could you please help evaluate if the 14mA input current value is normal based on customer's test condition. Thanks. Best regards, Wayne", + "partNumber" : " LM25118", + "allResponseList" : [ { + "contentId" : "3329545", + "userName" : "Garrett Roecker", + "rankPoints" : "18240", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 9:44 PM", + "userId" : "3456925", + "content" : "Wayne, Thanks for reaching out with your question and for considering the LM5118 in your design. The operating current of the LM5118 is when current sunk by the VIN pin. The specification is assuming there is no switching of the MOSFETs during this time. This condition can be tested by setting the UVLO pin voltage below 1.23V and besting the EN pin to 5V. Note that the specification is only for the VIN pin current. This doesn't include any external voltage dividers of the leakage current of other components. Please feel free to contact me directly if you have any questions. Thanks, Garrett" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM25118" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900266.json b/data/json/DLP/900266.json new file mode 100644 index 0000000000000000000000000000000000000000..9b59db9dffdb756ed3d6ccbaead46283f2120c1b --- /dev/null +++ b/data/json/DLP/900266.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900266", + "reporterName" : "Jacky Wang(QD)", + "rankPoints" : "7205", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC27524A: Question for ucc27524a input to output propagation delay specification", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 12", + "queryText" : "Part Number: UCC27524A Hi Experts, Our customer is curious about the input to output propagation delay specification for UCC27524A. In our datasheet, we stated that the min is 6ns, max is 23ns. If we look into the datasheet Figure 2, you will see we define the tD1 from input 90% High Level to output 10% High Level. So customer's questions are: 1. Can we explain it a little bit more details about the input to output propagation delay for this device? What's the major factor for this delay? 2. Is the tD1 equal to tD2 typically? In customer's real test, the tD1 is much longer than tD2, what's the influence in here? 3. What's the consideration for the tD1 and tD2 definition with input 90% High Level and output 10% High Level? As our understanding, it could be input 90% High Level and output 90% High Level.", + "partNumber" : " UCC27524A", + "allResponseList" : [ { + "contentId" : "3328071", + "userName" : "Don Dapkus", + "rankPoints" : "174575", + "rankName" : "Guru", + "date" : "Apr 26, 2020 11:54 AM", + "userId" : "1027", + "content" : "Hi, Jackie, I will follow up with you via email. Please mark this thread as Resplved by pressing the Green button." + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC27524A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900271.json b/data/json/DLP/900271.json new file mode 100644 index 0000000000000000000000000000000000000000..06dd7dc4f83e4718314a6557b9616bc29595cc5c --- /dev/null +++ b/data/json/DLP/900271.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900271", + "reporterName" : "majd ghadab", + "rankPoints" : "60", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TMP411: Sensors forum", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 12", + "queryText" : "Part Number: TMP411 Hello, I want to measure the temperature of some mosfets mounted on a heat sink as accurate as possible. I would send the Temperature to MCU, my Question ist: If I used the Tmp411 with pnp Transistor, I want to connect the ground of Mosfet with the Collector of the pnp transistor so it could have a better heat transfer. But in the datasheet, Figure 11 shows the use of arrow symbol on the Collector of the pnp transistor which is in the Figure is different from ground and is not shown as it is connected to ground of the Chip. So can I make this connection from Collector of PNP to ground? If its not possible, is there another solution to measure the temperature of Mosfet but with a direct connection to the heatsink. I thought it would be better to use a transistor with TO-220 Package so I would mount it directly on the heat sink but in the datasheet it recommends MMBT3906LP so I don't know which transistor would be the best to use with TO-220! Please help and thanks in Advance.", + "partNumber" : " TMP411", + "allResponseList" : [ { + "contentId" : "3328713", + "userName" : "David Vaseliou", + "rankPoints" : "4830", + "rankName" : "Expert", + "date" : "Apr 27, 2020 12:49 PM", + "userId" : "4910861", + "content" : "Hi, Connecting the collector of the PNP to ground should be okay as long as there is little ground noise. For BJT recommendations please see the below FAQ post. /support/sensors/f/1023/t/892887?-FAQ-Remote-Temperature-Sensors-What-remote-BJT-Thermal-diode-should-I-use- Thanks, David" + } ], + "tags" : [ "/support/sensors/f/1023/tags/Transistor%2bGround", "/support/sensors/f/1023/tags/TMP411" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900272.json b/data/json/DLP/900272.json new file mode 100644 index 0000000000000000000000000000000000000000..b428a370bb2104f6c5aaa7df5a18133422986a17 --- /dev/null +++ b/data/json/DLP/900272.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900272", + "reporterName" : "sneha gourishetty", + "rankPoints" : "40", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "Negative supply generation", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 27", + "queryText" : "Hii I have a requirment of negative supply voltage generating from input -15V to output -6V or -7.5V,1.5A or 2A for one of my application. I cannot use LDO since losses will be high can u suggest any switcher IC for the same. Regards", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3328203", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 27, 2020 1:48 AM", + "userId" : "3498075", + "content" : "Hi Sneha, You need a boost regulator for -15V to -6V conversion. I will forward your inquiry to other production line. B R Andy" + }, { + "contentId" : "3328364", + "userName" : "Helen chen", + "rankPoints" : "32965", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 6:35 AM", + "userId" : "4197150", + "content" : "Dear Sir, Please refer to SLVA985 and PMP9624 for a referecne. For the SLVA985, you just need to change TPS61088-Q to TPS61175 or TPS61178." + } ], + "tags" : [ ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900278.json b/data/json/DLP/900278.json new file mode 100644 index 0000000000000000000000000000000000000000..3c9683b3823636c32cd62396cf2185c258c7e4dc --- /dev/null +++ b/data/json/DLP/900278.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900278", + "reporterName" : "Hagen Wegner", + "rankPoints" : "60", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ79616-Q1: problem with auto addressing", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 16", + "queryText" : "Part Number: BQ79616-Q1 Hi, I am having problems with auto addressing a 616 with a bq79600 bridge. The data sheets of the 600 and the 616 do not agree how this is done but I tried both methods (and hundreds others) without success. To simplify things at the moment I have a 600 followed by a single 616. Below is a software trace of the messages sent and received. The reading back of the addresses after the auto addressing sequence (the 616 data sheet version shown) fails, neither the 600 nor the 616 is responding. reading register 0x2001 from the 600 works though (bottom). bq79616.c frm_snd(sng wri, adr 0, reg 0x0309, len 1) 0x90 0x00 0x03 0x09 0x20 0x13 0x95\nbq79616.c ret 7 bytes sent\nbq79616.c frm_snd(brc wri, adr 0, reg 0x034c, len 1) 0xd0 0x03 0x4c 0x00 0xfc 0x24\nbq79616.c ret 6 bytes sent\nbq79616.c frm_snd(brc wri, adr 0, reg 0x0309, len 1) 0xd0 0x03 0x09 0x01 0x0f 0x74\nbq79616.c ret 6 bytes sent\nbq79616.c frm_snd(brc wri, adr 0, reg 0x0306, len 1) 0xd0 0x03 0x06 0x00 0xcb 0x44\nbq79616.c ret 6 bytes sent\nbq79616.c frm_snd(brc wri, adr 0, reg 0x0306, len 1) 0xd0 0x03 0x06 0x01 0x0a 0x84\nbq79616.c ret 6 bytes sent\nbq79616.c frm_snd(brc wri, adr 0, reg 0x0308, len 1) 0xd0 0x03 0x08 0x02 0x4e 0xe5\nbq79616.c ret 6 bytes sent\nbq79616.c frm_snd(sng wri, adr 0, reg 0x0308, len 1) 0x90 0x00 0x03 0x08 0x00 0x13 0xdd\nbq79616.c ret 7 bytes sent\nbq79616.c frm_snd(sng wri, adr 1, reg 0x0308, len 1) 0x90 0x01 0x03 0x08 0x03 0x52 0x20\nbq79616.c ret 7 bytes sent\nbq79616.c reg_rea(brc rea, adr 0, reg 0x034c, len 0)\nbq79616.c ret 0 bytes received\nbq79616.c frm_snd(sng rea, adr 0, reg 0x0306, len 1) 0x80 0x00 0x03 0x06 0x00 0xd6 0x7e\nbq79616.c ret 7 bytes sent\nbq79616.c reg_rea(sng rea, adr 0, reg 0x0306, len 1)\nbq79616.c ret 0 bytes received\nbq79616.c address 0 read 0 response 0xff\nbq79616.c frm_snd(sng rea, adr 1, reg 0x0306, len 1) 0x80 0x01 0x03 0x06 0x00 0xd7 0x82\nbq79616.c ret 7 bytes sent\nbq79616.c reg_rea(sng rea, adr 1, reg 0x0306, len 1)\nbq79616.c ret 0 bytes received\nbq79616.c address 1 read 0 response 0xff\nbq79616.c frm_snd(sng rea, adr 0, reg 0x2001, len 1) 0x80 0x00 0x20 0x01 0x00 0x25 0x84\nbq79616.c ret 7 bytes sent\nbq79616.c reg_rea(sng rea, adr 0, reg 0x2001, len 1) 0x00 0x00 0x20 0x01 0x14 0x24 0x55\nbq79616.c ret 7 bytes received\nbq79616.c rea: 7\nbq79616.c frm: 0x00 0x00 0x20 0x01 0x14 0x24 0x55\n What have I missed? Regards, Hagen .", + "partNumber" : " BQ79616-Q1", + "allResponseList" : [ { + "contentId" : "3328124", + "userName" : "Taylor Vogt", + "rankPoints" : "6625", + "rankName" : "Expert", + "date" : "Apr 26, 2020 5:21 PM", + "userId" : "4375069", + "content" : "Hi Hagen, These parts are under NDA so we need to support this in private chat or email instead of E2E forum, the short answer is we provide sample code/guide and GUI after NDA is setup to reference. Can you identify and contact thecompany contact used to get the parts? Regards, Taylor" + }, { + "contentId" : "3328394", + "userName" : "Hagen Wegner", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 7:01 AM", + "userId" : "6020148", + "content" : "Hi Taylor, how can I send you an email? Regards, Hagen ." + }, { + "contentId" : "3329004", + "userName" : "Taylor Vogt", + "rankPoints" : "6625", + "rankName" : "Expert", + "date" : "Apr 27, 2020 3:24 PM", + "userId" : "4375069", + "content" : "Hagen, Please provide your email, and I will contact you. Kindly resolve this thread afterwards. Thanks, Taylor" + } ], + "tags" : [ "/support/power-management/f/196/tags/bq79616%2bauto%2baddressing", "/support/power-management/f/196/tags/BQ79616_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900279.json b/data/json/DLP/900279.json new file mode 100644 index 0000000000000000000000000000000000000000..41a1b64c8602fcfe50f4f93e678cc641e5b7d455 --- /dev/null +++ b/data/json/DLP/900279.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900279", + "reporterName" : "Ranveersinh jadav", + "rankPoints" : "20", + "resolutionStatus" : "", + "ticketName" : "WEBENCH® Tools/LM2621: lm2621", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 12", + "queryText" : "Part Number: LM2621 Tool/software: WEBENCH® Design Tools Hello, I am not getting LM2621 in Tina-Ti software component list. How to get .lib file or schematic file for simulation in Tina-Ti software? Can you help me out for this ?", + "partNumber" : " LM2621", + "allResponseList" : [ { + "contentId" : "3328046", + "userName" : "Zack Liu", + "rankPoints" : "12485", + "rankName" : "Genius", + "date" : "Apr 26, 2020 9:07 AM", + "userId" : "4961181", + "content" : "Hi Ranveersinh, I'm afraid there is no TINA or Spice Model available for LM2621 because this is a really old device. You can choose other Boost Converters here: /power-management/non-isolated-dc-dc-switching-regulators/step-up-boost/boost-converters-integrated-switch/products.html" + }, { + "contentId" : "3328737", + "userName" : "Ranveersinh jadav", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 1:03 PM", + "userId" : "6331119", + "content" : "Hello, Thank you for your answer. How to open step model(.stp ) file or cad file in Tina-ti Simulator to check silulation? Why thiscompany circuit not available in Tina-ti Simulator directly? How can or where can I simulate (LM2621 or LM2623). Can you guide me for that. CAD File (.bxl) STEP Model (.stp) Regards, Ranveersinh jadav" + }, { + "contentId" : "3329915", + "userName" : "Zack Liu", + "rankPoints" : "12485", + "rankName" : "Genius", + "date" : "Apr 28, 2020 5:26 AM", + "userId" : "4961181", + "content" : "Hi Jadav, Not allcompany device has TINA simulation models. The cad file is not for simulation. If you hope to simulate the boost converter in TINA, you can select another onecompany boost converter. Or tell me the Vin range, Vout, Iout specifications so that I can help you find a suitable one." + } ], + "tags" : [ "/support/power-management/f/196/tags/WEBENCH_AE00_%2bDesign%2bTools", "/support/power-management/f/196/tags/_2300_lm2621%2b_2300_tina_2D00_ti", "/support/power-management/f/196/tags/tina_2D00_ti", "/support/power-management/f/196/tags/LM2621" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900280.json b/data/json/DLP/900280.json new file mode 100644 index 0000000000000000000000000000000000000000..eb482c74e326735377ef45e21aaf25f9af029ed9 --- /dev/null +++ b/data/json/DLP/900280.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900280", + "reporterName" : "Ming Zhang2", + "rankPoints" : "40", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "IWR6843: moving poeple stand there and the tracking lost", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 18", + "queryText" : "Part Number: IWR6843 Hello, i tired industrial_toolbox_4_0_0, 2D people counting lab. when i stand there, the tracking is lost. any parameter i can change to keep tracking? thanks.", + "partNumber" : " IWR6843", + "allResponseList" : [ { + "contentId" : "3328251", + "userName" : "Akash Gondalia", + "rankPoints" : "39385", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 3:42 AM", + "userId" : "4768107", + "content" : "Hi Ming, Are you using the customization guide that is in the 'docs' folder of the People Counting Lab? I've looped in an expert to provide more specific tuning information. Regards, AG" + }, { + "contentId" : "3329036", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 3:36 PM", + "userId" : "5118664", + "content" : "Hi Ming Zhang, I recommend moving to the latest industrial toolbox version available, and using the \"Sense and Direct: HVAC Control\" demo for this purpose. Regards, Justin" + }, { + "contentId" : "3329756", + "userName" : "Ming Zhang2", + "rankPoints" : "40", + "rankName" : "Prodigy", + "date" : "Apr 28, 2020 2:08 AM", + "userId" : "6297144", + "content" : "Hi, Justin, i will try Sense and Direct: HVAC Control. its guide said up to 8 peoples, any issues for more than 8 peoples? thanks." + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR6843", "/support/sensors/f/1023/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2bIWR6843" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900283.json b/data/json/DLP/900283.json new file mode 100644 index 0000000000000000000000000000000000000000..9f4032b6d43c20bd9ed9257be1506ecdddb33860 --- /dev/null +++ b/data/json/DLP/900283.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900283", + "reporterName" : "user6222316", + "rankPoints" : "30", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS63020-Q1: Some questions about using TPS63020 as a TEC driver", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 19", + "queryText" : "Part Number: TPS63020-Q1 I use TPS63020 as a TEC drvier。 I use the Equations in the article SLVA677 to calculate the value of the R1，R2 and R3 。 I want to understand the relationship between the TEC current and the frequency, amplitude and duty cycle of the Vcrtl.", + "partNumber" : " TPS63020-Q1", + "allResponseList" : [ { + "contentId" : "3328130", + "userName" : "Milos", + "rankPoints" : "7260", + "rankName" : "Expert", + "date" : "Apr 26, 2020 6:14 PM", + "userId" : "5692358", + "content" : "Hi user6222316, Thanks for reaching out. First you need to see how Vctrl changes the output voltage. You can find this in several application notes, for example: /blogs_/b/powerhouse/archive/2020/02/18/adjusting-vout-in-usb-type-c-and-wireless-charging-applications-part-2 /lit/an/slyt777/slyt777.pdf The TEC current is then simply (Vin-Vout)/Rtec. Best regards, Milos" + }, { + "contentId" : "3328473", + "userName" : "user6222316", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 8:11 AM", + "userId" : "6222316", + "content" : "thanks，:-)" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS63020", "/support/power-management/f/196/tags/TPS63020_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900285.json b/data/json/DLP/900285.json new file mode 100644 index 0000000000000000000000000000000000000000..e312ca78e9a0cae78f2ebf8766fe890ac40dc571 --- /dev/null +++ b/data/json/DLP/900285.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900285", + "reporterName" : "Aneesh TS", + "rankPoints" : "1500", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "Design Equations used incompany Power stage designer", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 12", + "queryText" : "Hicompany Experts, I have seen a Power stage designer tool fromcompany in which all topologies can be simulated easily. Can anybody provide me the design equations used incompany Power stage designer at a one place. I mean design equation for turns ratio calculation, Inductor , RMS Mosfet and diode current etc.....for all topologies in a single place. Regards Aneesh", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3328171", + "userName" : "Benjamin Lough", + "rankPoints" : "22025", + "rankName" : "Mastermind", + "date" : "Apr 26, 2020 11:39 PM", + "userId" : "4369191", + "content" : "Hi Aneesh, The equations for power stage designer are documented here:/seclit/ug/slyu036/slyu036.pdf?ts=1587944240013 Best Regards, Ben Lough" + } ], + "tags" : [ ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900286.json b/data/json/DLP/900286.json new file mode 100644 index 0000000000000000000000000000000000000000..8543a16a50be1b5992a2558903a82479665b5063 --- /dev/null +++ b/data/json/DLP/900286.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900286", + "reporterName" : "user6333045", + "rankPoints" : "10", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "PGU lumens budget calculator for AR-HUD", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 23", + "queryText" : "Where could I find the PGU lumens budget calculator for AR-HUD? Need this calculator to do the conceptual design for our customer application in Automotive business based on DLP technology. What is the maximum resolution that can be supported bycompany DLP DMD device?", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3328768", + "userName" : "Fizix", + "rankPoints" : "25980", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 1:19 PM", + "userId" : "15396", + "content" : "Hello User, Welcome to the DLP section of the TI-E2E community. I have forwarded your question to the team most familiar with your type of application. Fizix" + }, { + "contentId" : "3328870", + "userName" : "Jackson Thomas", + "rankPoints" : "640", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 2:14 PM", + "userId" : "4406159", + "content" : "Hello, The AR HUD Lumen Budget Estimation Calculator can be found at the link below. /tool/DLP-HUD-LUMEN-CALC There are two automotive qualified DMDs for AR-HUD applications. The DLP3030-Q1 offers an output resolution of 864x480. The DLP5530-Q1 offers and output resolution of 1152x576. Best Regards, Jackson" + } ], + "tags" : [ "/support/dlp/f/94/tags/Brightness", "/support/dlp/f/94/tags/ARHUD", "/support/dlp/f/94/tags/dlp", "/support/dlp/f/94/tags/pico", "/support/dlp/f/94/tags/DMD" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900287.json b/data/json/DLP/900287.json new file mode 100644 index 0000000000000000000000000000000000000000..e25fc1ff085f37d142e2775157466b21b83ef38c --- /dev/null +++ b/data/json/DLP/900287.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900287", + "reporterName" : "Jacky Wang(QD)", + "rankPoints" : "7205", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ25890H: bq25890H bqStudio Software", + "rankName" : "Expert", + "replies" : " 2", + "views" : " 11", + "queryText" : "Part Number: BQ25890H Hi Experts, Our customer wants to evaluate the bq25890H charger, but we can not find the bqStudio software for this device. We have already downloaded the latest BatteryManagementStudio software, but can not find it. Where we can get it? Thanks.", + "partNumber" : " BQ25890H", + "allResponseList" : [ { + "contentId" : "3328882", + "userName" : "Ning T", + "rankPoints" : "15365", + "rankName" : "Genius", + "date" : "Apr 27, 2020 2:23 PM", + "userId" : "145100", + "content" : "Hi, Please use BQ25890 instead. It is similar. Please visit for BQ25890H TIDA design. Thanks, Ning." + }, { + "contentId" : "3329694", + "userName" : "Jacky Wang(QD)", + "rankPoints" : "7205", + "rankName" : "Expert", + "date" : "Apr 28, 2020 12:57 AM", + "userId" : "3497291", + "content" : "Hi Ning, The bq25890H has the different registers compared with bq25890, especially for the DP/DM DAC control, and customer needs them to simulate the QC3.0 protocol. I'm not sure how to control it if we have no PC software for bq25890H, can you help to double check it again? Also, can you help to check if we have the Linux drivers for bq25890H for QC3.0 simulation through DP/DM DAC control? Thanks a lot!" + } ], + "tags" : [ "/support/power-management/f/196/tags/bq25890H", "/support/power-management/f/196/tags/bqStudio" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900290.json b/data/json/DLP/900290.json new file mode 100644 index 0000000000000000000000000000000000000000..0983aacfdb3ba96af6dce01635fef93da7846b44 --- /dev/null +++ b/data/json/DLP/900290.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900290", + "reporterName" : "Jacky Wang(QD)", + "rankPoints" : "7205", + "resolutionStatus" : "", + "ticketName" : "LM27761: Question for LM27761 input and output range", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 10", + "queryText" : "Part Number: LM27761 Hi experts, Our customer is evaluating the LM27761 for 3.3V input to -4V output application, but having some issues for the output voltage. From the datasheet design example, looks like we can support this use case, do you know what's the problem in here? What's the minimum negative voltage we can get from 3.3V input for this device?", + "partNumber" : " LM27761", + "allResponseList" : [ { + "contentId" : "3328115", + "userName" : "Febin", + "rankPoints" : "1450", + "rankName" : "Intellectual", + "date" : "Apr 26, 2020 4:07 PM", + "userId" : "5781698", + "content" : "Hi Jacky, If I understand correctly, the customer wants a Vout of -4V when Vin is 3.3V. This is not possible with this device. It is a voltage inverter and the efficiency of this device is also not very high. Hence, the output voltage will be definitely less than 3.3V and this value is solely dependent on the customer application, load conditions, etc. It is not possible to determine an exact voltage threshold. Regards, Febin" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM27761" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900291.json b/data/json/DLP/900291.json new file mode 100644 index 0000000000000000000000000000000000000000..0d47de03f445dc589a398434e28f949a03e155c7 --- /dev/null +++ b/data/json/DLP/900291.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900291", + "reporterName" : "Victor Levy", + "rankPoints" : "240", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS56637: Design questions by customer", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 12", + "queryText" : "Part Number: TPS56637 Hello, I have a customer asking the following: In my new design I use DC/DC (12V to 1V/6A) TPS56637RPAR. According to Datasheet and Evaluation Board Guideline The AGND should be designed separated from PGND and connected at one point. Are this must or as a option? What purpose of this recommendation? Is this recommendation could be to my detriment when used 8 layers PCB and many high speed ICs? Thermal problems? Report_12V_to_1V_5A.pdf Thanks in advance", + "partNumber" : " TPS56637", + "allResponseList" : [ { + "contentId" : "3328073", + "userName" : "Yuchang Zhang", + "rankPoints" : "8080", + "rankName" : "Expert", + "date" : "Apr 26, 2020 12:02 PM", + "userId" : "4780235", + "content" : "Hi, it is not a must, but doing this is just helpful to provide a clean reference ground for quiet analog signal.so it is recommended, not related to thermal performance. Yuchang" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS56637" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900293.json b/data/json/DLP/900293.json new file mode 100644 index 0000000000000000000000000000000000000000..a24fa29de1897f8a621d6a396830d3df5d801acc --- /dev/null +++ b/data/json/DLP/900293.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900293", + "reporterName" : "Dejan Hrovatin", + "rankPoints" : "350", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "INA233 input filter", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 43", + "queryText" : "Hello, I'm planning to use INA233AIDGST in my application. According to Figure 1: Frequency response (attached below) from datasheet of INA233, we can see that bandwith of diff. amp. is around 300 Hz. I try to calculate input filter (suggested on page 15, figure 25) consist of two 10R resistor and 100n capacitors. It must be around 160 kHz. (fc=1/(2*pi*R*C)). With INA233 I would like to measure current and voltage at switcher regulator input and output with switching frequency 120k or 215kHz (I will decide later). I think that it is better to use filter capacitor with higher value. 470n will bring cut off frequency of around 39 kHz which sounds better (120k of switcher is 3 times higher). What do you think? You reccomend to use filter resistor no large than 10R - is this value connected to current flowing in to IN+/IN- input of INA? How is the frequency bandwith of INA233 (which is around 300 Hz) connected to cut off frequency of external filter? I can not imagine how much the filter with much higher cut off frequency helps here? Doest the INA260 consist of INA233 with 2mR resistor integrated in reality? Many thanks!", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3329366", + "userName" : "Peter Iliya", + "rankPoints" : "10710", + "rankName" : "Genius", + "date" : "Apr 27, 2020 7:05 PM", + "userId" : "4768104", + "content" : "Hey Dejan, We recommend the input resistors to be less or equal than 10-Ohm because of an imbalance in IB+ and IB- due to input differential impedance of around 10 kOhm. As described in section 7.4.4, the input filter/resistors are only really needed if there are load current transients that occurs at the device’s sampling frequency (500kHz +/-10%) or if there are fast common-mode voltage transients at the input pins. In the latter scenario, the input resistors help limit any input ESD conduction current. Yes, the INA260 is essentially an INA223, but with an integrated 2mOhm shunt resistor. Sincerely, Peter" + } ], + "tags" : [ "/support/sensors/f/1023/tags/INA233", "/support/sensors/f/1023/tags/frequency%2bbandwith", "/support/sensors/f/1023/tags/input%2bfiltering", "/support/sensors/f/1023/tags/INA260" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900301.json b/data/json/DLP/900301.json new file mode 100644 index 0000000000000000000000000000000000000000..e0f569869a3f809bca458fdeaeeb52bbc63e52c6 --- /dev/null +++ b/data/json/DLP/900301.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900301", + "reporterName" : "kuro", + "rankPoints" : "60", + "resolutionStatus" : "", + "ticketName" : "BQ25887: Audible noise can be heard near the IC when taper charging.", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 26", + "queryText" : "Part Number: BQ25887 Audible noise can be heard near the IC when taper charging. Is there a cause and solution? The frequency of the audible noise is about 6.7 kHz. The schematics and constants are basically created by referring to datasheets and EVMs. When it shifts to tapered charge, the I2C control squeezes the charge current to make it inaudible. If this problem can be solved by replacing the value or variety of the parts, I would prefer that. File attached. Thank you very much. schematic_bq25887.pdf", + "partNumber" : " BQ25887", + "allResponseList" : [ { + "contentId" : "3328996", + "userName" : "Michael Emanuel35", + "rankPoints" : "2055", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 3:22 PM", + "userId" : "4996893", + "content" : "Can you provide me with the register setting of REG02? I am worried that Out of Audio PFM is disabled. Can you provide waveforms of the BAT current, BAT voltage, SW node, and VBUS when this is occurring? Also, I am having trouble understanding your issue. You say there is audible noise, but that the \"I2C control squeezes the charge current to make it inaudible.\" What conditions result in audible situations and what conditions result in inaudible situations? Can you please provide the above waveforms for each case? Thanks, Mike Emanuel Please click \"This resolved my issue\" button if this post answers your question." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25887" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900305.json b/data/json/DLP/900305.json new file mode 100644 index 0000000000000000000000000000000000000000..1392c6f80f2ce6b815a1cad3f36094163175eda2 --- /dev/null +++ b/data/json/DLP/900305.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900305", + "reporterName" : "Minqi Zhao", + "rankPoints" : "1100", + "resolutionStatus" : "", + "ticketName" : "BQ24105: NiMH charging solution of Type C and solar panel", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 10", + "queryText" : "Part Number: BQ24105 Dear experts, My customer is looking for a 3s NiMH cell (4.5-5.4V) charging solution, need to meet their demand as below: 1.Temperature protection. The temperature range is -20-50C; 2.Power path. The system load is a buzzer, load current is 20-200mA; 3.The input source is first USB Type C(3A fast charging), then switch to the solar panels(6-8V 20-100mA) to slowly charge the battery and power the system load. The charge current is <600mA. I chose BQ24105 for and wonder is it the best choice? And my second question is how to switch from Type C to solar panel charging? Do they need to add a charging port controller IC, and do you have some recommendations and suggestions? Thanks.", + "partNumber" : " BQ24105", + "allResponseList" : [ { + "contentId" : "3329063", + "userName" : "Jeff F", + "rankPoints" : "88360", + "rankName" : "Guru", + "date" : "Apr 27, 2020 3:52 PM", + "userId" : "8433", + "content" : "Hi Minqi, Unfortunately,company doesn't have a single IC solution that meets all of the requirements below: 1. boost charge from 5V USB to 5.4V - most of our chargers are buck converter based 2. adjustable charge termination timer - NiMH charge termination by safety timer timeout is generally okay for charger currents < 0.5C. For higher currents, i.e. faster charging, it is generally recommended to terminate using either dV/dt or dT/dt. The onlycompany charger with this type of termination is BQ2000 buck family. 3. adjustable charge regulation voltage - Most ofcompany chargers are designed for LiIon. Those that are host controlled will default to some multiple of 4.2V but can be adjusted via I2C register. The few standalone versions with adjustable charge regulation voltage (like BQ24105) use external resistor divider to set the voltage. 4. adjustable VINDPM to prevent collapsing the highZ solar panel - Same comment as above regarding adjustable VINDPM (to set MPP) between I2C vs standalone. Are you open to a 2 or more chip solution? Do you have a host processor capable of I2C commands or do you want standalone (resistor/capacitor) settable solution? Regards, Jeff" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ24105" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900310.json b/data/json/DLP/900310.json new file mode 100644 index 0000000000000000000000000000000000000000..be45da4ba42a4bd9263d01765405bce42b4be94a --- /dev/null +++ b/data/json/DLP/900310.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "900310", + "reporterName" : "Zt Liu", + "rankPoints" : "90", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS8804EVM: Question concerning TPS8804EVM AGND pin and its layout", + "rankName" : "Prodigy", + "replies" : " 6", + "views" : " 37", + "queryText" : "Part Number: TPS8804EVM Dearcompany team, Just got the lovely TPS8804EVM. Before doing the experiments, I have some question about the AGND pin and its layout . 1. Is AGND (pin 5) already internally connected to the DGND pin (pin32) and/or thermal pad and/or PGND pin (pin 17)? 2. Why in the layout of TPS8804EVM, AGND pin externally connects to nothing but only an isolated place. (see belowed) Why can't this pin connect externally to the thermal pad? Or do I make any mistake? 3. In the Datasheet, AGND (pin 5) is described as \"Analog ground. Connect to ground plane.\" Does this statement contradict to the layout of EVM board? (I've measured that there is no significant resistance between this isolated AGND plane and other ground plane.) (Top side of the board) (Bottom side of the board) Looks like that at least the AGND Pin is internally connected to the thermal pad. And I am not sure about why the pin 4 is left in an isolated plane externally. Thanks for reading this post, and hope someone will answer my question. Zt.", + "partNumber" : " TPS8804EVM", + "allResponseList" : [ { + "contentId" : "3328123", + "userName" : "Aaron Goodson", + "rankPoints" : "5630", + "rankName" : "Expert", + "date" : "Apr 26, 2020 5:00 PM", + "userId" : "4719001", + "content" : "Hi, I have notified our expert regarding this topic. Please expect a response by 4/29/20. Thanks, Aaron" + }, { + "contentId" : "3329487", + "userName" : "Grant Falkenburg", + "rankPoints" : "1730", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 8:51 PM", + "userId" : "5070306", + "content" : "Hi Zt., Thanks for your question. The AGND, DGND, PGND, and thermal pad are all isolated. The connection from all of these to a central ground reference needs to be done on the PCB. This assessment is accurate given the information you have. However, the PCB is 4-layer and an internal layer connects AGND to the GND plane and thermal pad. It is good to connect AGND directly to the thermal pad similar to the DGND connection. It is connected on the EVM (see #2). I understand how these layout diagrams can be confusing given that two of them are missing. I will look into updating the user guide with the internal layers. Let me know if you have any other questions. Best regards, Grant" + }, { + "contentId" : "3329569", + "userName" : "Zt Liu", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 10:27 PM", + "userId" : "6326104", + "content" : "Thank you so much, Grant! I didn't know that it's a four layer board. That really answered my question. I am wondering if we can have the design file of TPS8804EVM, or at least the gerber files? In case we have more questions like this. Best regards, Zt" + }, { + "contentId" : "3329723", + "userName" : "Grant Falkenburg", + "rankPoints" : "1730", + "rankName" : "Intellectual", + "date" : "Apr 28, 2020 1:35 AM", + "userId" : "5070306", + "content" : "Hi Zt, Here are some images of the inner layers. I can send you the Gerber files if needed but it will take a few days to get the files ready. Best regards, Grant" + }, { + "contentId" : "3329844", + "userName" : "Zt Liu", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 28, 2020 3:45 AM", + "userId" : "6326104", + "content" : "Thank you so so much, Grant! Please send me gerber files, there is so much we can learn from your design! zhihtailiu@gmail.com Best Regards, Zt." + }, { + "contentId" : "3329847", + "userName" : "Grant Falkenburg", + "rankPoints" : "1730", + "rankName" : "Intellectual", + "date" : "Apr 28, 2020 3:50 AM", + "userId" : "5070306", + "content" : "Hi Zt, No problem at all. I will prepare the files and will let you know when they're ready. Please be patient as it can take a few days. Best regards, Grant" + } ], + "tags" : [ "/support/sensors/f/1023/tags/TPS8804EVM" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900311.json b/data/json/DLP/900311.json new file mode 100644 index 0000000000000000000000000000000000000000..cb5436828480ffbeccb19b541f9cdfbdde71e98c --- /dev/null +++ b/data/json/DLP/900311.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900311", + "reporterName" : "Alex Lai70", + "rankPoints" : "140", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS784-Q1: TPS784-Q1 output voltage", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 11", + "queryText" : "Part Number: TPS784-Q1 Hello, if i want to set Vout-=1.25V, how to decide the value of R1/R2 since R2 need to be samller than 80K?", + "partNumber" : " TPS784-Q1", + "allResponseList" : [ { + "contentId" : "3329408", + "userName" : "Jason Song", + "rankPoints" : "12645", + "rankName" : "Genius", + "date" : "Apr 27, 2020 7:42 PM", + "userId" : "1505435", + "content" : "Hi Alex, You first pick your R2, and it needs to be smaller than 80K. You will then use Equation 2 and 3 on Page 14 to pick R1. Please let me know if you still have trouble getting the R1. Regards, Jason Song" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS784_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900313.json b/data/json/DLP/900313.json new file mode 100644 index 0000000000000000000000000000000000000000..08fc58a2e18cfcd62529ac3d0fe683e9c9325043 --- /dev/null +++ b/data/json/DLP/900313.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900313", + "reporterName" : "Kailyn Chen", + "rankPoints" : "4410", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LDC1614: LDC1614EVM GUI", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: LDC1614 Hello, Why installed the LDC1614EVM GUI, but when connected the EVM , the GUI appeared LDC1101 instead of LDC1614? Best regards Kailyn", + "partNumber" : " LDC1614", + "allResponseList" : [ { + "contentId" : "3328240", + "userName" : "Arjun_Prakash", + "rankPoints" : "3090", + "rankName" : "Expert", + "date" : "Apr 27, 2020 3:28 AM", + "userId" : "1287488", + "content" : "Hi Kailyn, The LDC1101 and LDC1614EVM GUIs are completely run on different version of software. The LDC1101 requires a labview installation where as the LDC1614 requires the sensing solution GUI. The GUI does not appear by itself unless the executable is clicked. Can you please make sure the Sensing Solution GUI is invoked when connecting to a LDC1614EVM ? Thanks." + } ], + "tags" : [ "/support/sensors/f/1023/tags/LDC1614EVM", "/support/sensors/f/1023/tags/LDC1614", "/support/sensors/f/1023/tags/LDC1101" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900314.json b/data/json/DLP/900314.json new file mode 100644 index 0000000000000000000000000000000000000000..8f2ea06d5be9e49de7d6b806060bf24d6f6a05d0 --- /dev/null +++ b/data/json/DLP/900314.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900314", + "reporterName" : "user6256355", + "rankPoints" : "120", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "IWR6843ISK-ODS: IWR6843ISK-ODS", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 19", + "queryText" : "Part Number: IWR6843ISK-ODS hello， i am developing on the IWR6843, and the 3DPeoplecountingDemo_ConfigurationDetails.pdf show that 68xxChirpParams_Classifierdemo.xlsx provides some information, but i can't find it. can you please send me the link. Thank you very much.", + "partNumber" : " IWR6843ISK-ODS", + "allResponseList" : [ { + "contentId" : "3328252", + "userName" : "Akash Gondalia", + "rankPoints" : "39385", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 3:44 AM", + "userId" : "4768107", + "content" : "Hi User, Can you clarify which version of the Industrial Toolbox you are using? Regards, AG" + }, { + "contentId" : "3328256", + "userName" : "user6256355", + "rankPoints" : "120", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 3:54 AM", + "userId" : "6256355", + "content" : "hi, I'm using the mmwave_industrial_toolbox_4_2_1 and 68xx_3D_people_counting project. Best wishes." + }, { + "contentId" : "3329033", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 3:34 PM", + "userId" : "5118664", + "content" : "Hi, Aplogize, I guess the name is wrong - see the file 3DPeoplecountingDemo_ConfigurationDetails.pdf in the 3D People Counting Docs folder. Regards, Justin" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR6843", "/support/sensors/f/1023/tags/IWR6843ISK_2D00_ODS" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900315.json b/data/json/DLP/900315.json new file mode 100644 index 0000000000000000000000000000000000000000..dabf48703771b2d1ca36bc48a26557172e550fd0 --- /dev/null +++ b/data/json/DLP/900315.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900315", + "reporterName" : "Frank Xiao", + "rankPoints" : "8890", + "resolutionStatus" : "", + "ticketName" : "UCD9090A: error loading and runing when open the Fusion software", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 10", + "queryText" : "Part Number: UCD9090A Hi team, My customer is testing the UCD9090A, but meet the issue below when install and open the software. ‘error loading and runing.....’ Do you have some ideas about the phenomenon? Thanks.", + "partNumber" : " UCD9090A", + "allResponseList" : [ { + "contentId" : "3328696", + "userName" : "Qian Chen", + "rankPoints" : "21370", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 12:38 PM", + "userId" : "1501908", + "content" : "HI Frank, Can you ask customer the install the Fusion to a different folder. Please refer to below post. Thanks Qian" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCD9090A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900322.json b/data/json/DLP/900322.json new file mode 100644 index 0000000000000000000000000000000000000000..643b240b4cf73415c45edd899797fe4add4d6d87 --- /dev/null +++ b/data/json/DLP/900322.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900322", + "reporterName" : "hai tu", + "rankPoints" : "10", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCD90124A: FAN_FAULT alarms GUI not working", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 9", + "queryText" : "Part Number: UCD90124A I tried to have GPO which ANDED all 4 fans fault alarms. From the GUI Status: FAN_FAULT showed all 4 fans, and I checked all Enable boxes. When saved \"write to Hardware\", only FAN1 fault was saved, and the other 3 fans were not. I am using latest Fusion GUI. Any advice ? Thanks!", + "partNumber" : " UCD90124A", + "allResponseList" : [ { + "contentId" : "3328698", + "userName" : "Qian Chen", + "rankPoints" : "21370", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 12:39 PM", + "userId" : "1501908", + "content" : "Hi Hai, We will check and reply to you. Thanks Qian" + }, { + "contentId" : "3328820", + "userName" : "yihe", + "rankPoints" : "23920", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 1:48 PM", + "userId" : "303879", + "content" : "Hi Hai We had communicated this issue over email and will have it fixed in the next release. Regards Yihe" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCD90124A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900323.json b/data/json/DLP/900323.json new file mode 100644 index 0000000000000000000000000000000000000000..bc28adfa1b5e6b28e1897b74544443d268dbc901 --- /dev/null +++ b/data/json/DLP/900323.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900323", + "reporterName" : "Shenhua Zhang", + "rankPoints" : "520", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS56637: OCP limit for 20V input and 5V output condition", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 20", + "queryText" : "Part Number: TPS56637 Hi Expert, 1. Can below circuit continuously output 5V/6A(30W), when input is 20V? What will the thermal performance be with 5V/6A under nature cooling and typical layout condition? 2. What is the output current OCP limitation for below schematic? How to calculate and modify? 3. How will the converter respond when OCP happens?", + "partNumber" : " TPS56637", + "allResponseList" : [ { + "contentId" : "3328179", + "userName" : "Yuchang Zhang", + "rankPoints" : "8080", + "rankName" : "Expert", + "date" : "Apr 27, 2020 12:16 AM", + "userId" : "4780235", + "content" : "Hi, 1, it support this application, you can use webench to evaluate the thermal. 2, OCP is fixed value, can’t be changed, you can check page5 “current limitation” to get. 3, When hit OCP, current will be limited and then Vout will drop to hit UVP, then happen hiccups, you can check page15 datasheet for details. Yuchang" + }, { + "contentId" : "3328525", + "userName" : "Shenhua Zhang", + "rankPoints" : "520", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 9:13 AM", + "userId" : "5617559", + "content" : "Hi Expert, Thanks for the info, however I cannot find thermal performance(tested thermal image) anywhere, no matter in EVM user's guide, or in Webench. Please help check." + }, { + "contentId" : "3329875", + "userName" : "Bruce Lu (MCP)", + "rankPoints" : "780", + "rankName" : "Intellectual", + "date" : "Apr 28, 2020 4:33 AM", + "userId" : "5032350", + "content" : "Hi Shenhua, Just refer to the thermal picture below from EVM for reference: 19V-5V/6A,15mins, Ta=25degC: Tc = 78.5degC 24V-5V/6A, 15mins, Ta=25degC: Tc = 85.6degC Thanks very much. Bruce" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS56637" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900324.json b/data/json/DLP/900324.json new file mode 100644 index 0000000000000000000000000000000000000000..a074d6cc3f4463db25e7c3ca0c65c0a7d0b7cd0f --- /dev/null +++ b/data/json/DLP/900324.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900324", + "reporterName" : "Andre Dias", + "rankPoints" : "10", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "AWR1642BOOST: Access to the People Counting demo bin file", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 9", + "queryText" : "Part Number: AWR1642BOOST Good afternoon, I'm using Linux and I have install the SDK mmwave_sdk_02_01_00_04-Linux-x86-Install and after install I haven't found the demo project for People Counting. Can you provide me the file or the procedure to obtain? Thanks Best Regards André Dias", + "partNumber" : " AWR1642BOOST", + "allResponseList" : [ { + "contentId" : "3328254", + "userName" : "Akash Gondalia", + "rankPoints" : "39385", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 3:48 AM", + "userId" : "4768107", + "content" : "Hi Andre, The People Counting Lab has not been supported on AWR1642 in several months, you will need to find an older version of the mmWave Industrial Toolbox and download it. I believe any version prior to 3.6.2 will have a compatible version of the People Counting Lab. Moving forward we recommend People Counting on the IWR6843. For further queries on People Counting please open up a new thread and we can put you in touch with acompany Expert. Regards, AG" + } ], + "tags" : [ "/support/sensors/f/1023/tags/AWR1642BOOST" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900327.json b/data/json/DLP/900327.json new file mode 100644 index 0000000000000000000000000000000000000000..4328e6d8d9d10c1d2b8f2f917aafeb15ec6affe6 --- /dev/null +++ b/data/json/DLP/900327.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900327", + "reporterName" : "Manoj Hiwarkar85", + "rankPoints" : "510", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "COVID-19?", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 88", + "queryText" : "Do you have any technology which can be used with CCTV camera to detect COVID-19?", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3329555", + "userName" : "Vivek Thakur", + "rankPoints" : "9880", + "rankName" : "Genius", + "date" : "Apr 27, 2020 10:14 PM", + "userId" : "9052", + "content" : "Hello Manoj, I am not aware a DLP reference solution which can be used to detect COVID-19 in a CCTV camera. The DLP technology is used for spectral sensing. It can be used to detect a spectrum signature. However, signal strength and noise will be an issue in such large view (CCTV) application. Spectral analysis using DLP will be more suitable for handheld or desk top application i.e sample is closely placed against a detector. The DLP chip-set can be used to detect up to 2500 nm wavelength . /dlp-chip/advanced-light-control/near-infrared/overview.html regards, Vivek" + } ], + "tags" : [ ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900334.json b/data/json/DLP/900334.json new file mode 100644 index 0000000000000000000000000000000000000000..47359d37ab5f10add6c5e67fcf98304c3d1d37e8 --- /dev/null +++ b/data/json/DLP/900334.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "900334", + "reporterName" : "Tim Minke1", + "rankPoints" : "30", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "WEBENCH® Tools/TPS92515HV-Q1: Designing a driver with EMI filtering for driving high current leds", + "rankName" : "Prodigy", + "replies" : " 5", + "views" : " 29", + "queryText" : "Part Number: TPS92515HV-Q1 Tool/software: WEBENCH® Design Tools Unfortunately, the Webench tool is not available for this part. I'm looking to use this part in a circuit with CISPR 25 Class 5 Noise filtering for driving 9 high power LEDs @ 2A the LED's Vf range: Forward Voltage VF min 2.3 | 3.0 | 3.0 | 3.0 V V VF max 3.6 | 3.9 | 3.9 | 3.9 V V total 31.5|34.2|34.2|34.2 V They're multi-die LEDs and I know I'll have to have 4 individual drivers and 2 designs they are tested with a 20ms pulse. I want to use an AVR (ATmega328P) to control the driver and blink the LEDs in different fashions I'm still a student and trying to make my mark in the industry with an amazing product. Thanks in advance!", + "partNumber" : " TPS92515HV-Q1", + "allResponseList" : [ { + "contentId" : "3328228", + "userName" : "Irwin Nederbragt", + "rankPoints" : "20765", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 2:56 AM", + "userId" : "1880111", + "content" : "Hello, CISPR 25 level 5 is difficult to reach. Look at PMP15004. This design meets CISPR 25 level 3. I placed an enclosure around it, bypassed the input and output and reached CISPR 25 Class 5 with our internal testing. Your input voltage must be higher since the output voltage is much higher. If your design is run at 100% duty cycle it will be a difficult task. Also, what duty cycle are you pulsing at? What is your input voltage range? The more information the better we can help. Best Regards," + }, { + "contentId" : "3328234", + "userName" : "Tim Minke1", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 3:16 AM", + "userId" : "6333217", + "content" : "The Voltage range is an Automotive 12Vdc so a range from Vmin ~11V up to Vmax~14Vdc I'm open to other IC suggestions I need min CISPR class 3 filtering but the higher the better. Each led needs 2A. so the theoretical options are: A) Drive them in series and have 2A @ 31.5v (R) / 34.2v (W,B,G) B) Drive them in parallel and have 18A @ 3.5v (R)/ 3.8 V (W,B,G) C) Drive them series parallel 3x3 and have 6A @ 10.2v (R)/11.4v (W,B,G) I'm learning more every day! recently turned my life around and am committed to this project! your time will never be wasted! Thanks again!" + }, { + "contentId" : "3329288", + "userName" : "Irwin Nederbragt", + "rankPoints" : "20765", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 5:59 PM", + "userId" : "1880111", + "content" : "Hello Tim, I would look at the TPS92691 or TPS92692 used as a boost converter for 31.5V or 34.2V at 2A. Probably the best route as long as the input voltage cannot go higher than the output. The LM3409 can be used at 6A as a buck converter though I don't see this as being a viable solution since the output can be higher voltage than the input. Also there are tolerances and temperature to take into account, the LED isn't a fixed voltage drop, it will go up at colder temperatures. The TPS92640/641 can be used at 18A as a buck converter, this design will be a bit more difficult since the currents are high. If it is automotive the TPS92640/641 is not automotive grade. Best Regards," + }, { + "contentId" : "3329477", + "userName" : "Tim Minke1", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 8:40 PM", + "userId" : "6333217", + "content" : "I'm going to give the TPS92692 a shot! do you have any ready-made filtered circuits that I can use for now until I put together my own detailed one? Do I need/ would it be helpful to have a voltage regulator on in Vin to bring the 11v-14v to a stable 12vdc?" + }, { + "contentId" : "3329541", + "userName" : "Irwin Nederbragt", + "rankPoints" : "20765", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 9:42 PM", + "userId" : "1880111", + "content" : "Hello Tim, If you read through the datasheet you will see this part was intended to run from a car battery including cold crank. Pre-regulating at that level will not buy you anything except added complexity. The TPS92692 EVM has filtering to meet Class 3 CISPR 25, this is without an enclosure. Most likely you will need an enclosure to pass Class 5, especially at you power level. If you look at some of the TIDAs they have filters that can meet CISPR 25 Class 5 levels. Check TPS92682 for this. This part has SPI interface so it requires communication however, the power designs are boost, boost to battery which should yield similar EMI results. Note as the power level goes up the filtering for the fundamental frequency will also have to go up. Best Regards," + } ], + "tags" : [ "/support/power-management/f/196/tags/WEBENCH_AE00_%2bDesign%2bTools", "/support/power-management/f/196/tags/TPS92515HV_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900335.json b/data/json/DLP/900335.json new file mode 100644 index 0000000000000000000000000000000000000000..d7673ed399826c8a73a746fdb85b6e8cb587ce3d --- /dev/null +++ b/data/json/DLP/900335.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900335", + "reporterName" : "Nedd Bki", + "rankPoints" : "135", + "resolutionStatus" : "", + "ticketName" : "BQ25703A: Charging issue after self discharge", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 12", + "queryText" : "Part Number: BQ25703A Hi, I'm reaching a problem with bq25703a. I have already designed Li-Ion battery charging station(adapter input energy always ON) which will charge 2 series li-ion battery. It works good but there is a problem. Lithium-ion batteries self discharging after period of time (Example 3 months, 10% capacity drop). I want battery to recharge after it goes down to a charge voltage threshold.(Note: During this time, the adapter/input is always ON). Charging starts when the battery voltage level drops below the charge voltage threshold. But the problem is here. Unfortunately, charge is never stop. It does not switch to constant voltage(CV) mode. It continues to charge with constant current(CC). This is very dangerous for li-ion batteries. NOTE: For test, after the fully charge termination I discharged a battery with resistor when battery still stay in the charge station. (For minimum charge voltage threshold) I hope you understand the system. Do you have any suggestions? How can I solve this issue with the software? Thanks a lot", + "partNumber" : " BQ25703A", + "allResponseList" : [ { + "contentId" : "3329490", + "userName" : "Tiger Zhou", + "rankPoints" : "610", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 8:54 PM", + "userId" : "1451791", + "content" : "Hi, Nedd, BQ25703A needs to interface with a host controller to set its charge current and charge voltage. Did the battery reach your preset charge voltage during CC charging? Charging safety is our utmost concern. There are multiple levels of protection mechanism inside the part. Please follow our schematic checklist below. /support/power-management/f/196/t/871078" + } ], + "tags" : [ "/support/power-management/f/196/tags/Recharge", "/support/power-management/f/196/tags/selfdischarge", "/support/power-management/f/196/tags/BQ25703A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900337.json b/data/json/DLP/900337.json new file mode 100644 index 0000000000000000000000000000000000000000..5a3c7ebed769120a13f7925c8578f03495d17985 --- /dev/null +++ b/data/json/DLP/900337.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900337", + "reporterName" : "Manimaran Kanesan", + "rankPoints" : "340", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS3840: Need voltage supervisor to support 700mA.", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 16", + "queryText" : "Part Number: TPS3840 Dear TI, I need to disable the TPS63070 when battery voltage VBAT drop below 2.9V. The board also powered by USB (when connected to USB and VBAT is disabled), and VUSB connected to EN to the TPS63070. When no USB the board powered by VBAT. Question is the board need 700mA, if TPS3840 Input pin connected to VBAT and RESET pin connected to VIN pin and EN pin of TPS63070, can TPS3840 handle 700mA of load. No to confuse, can TPS3840 handle 700mA passthru current from battery to load? Can you recommend other part if this part is not suitable. BRgds Manimaran", + "partNumber" : " TPS3840", + "allResponseList" : [ { + "contentId" : "3328164", + "userName" : "Marcoo Z", + "rankPoints" : "12020", + "rankName" : "Genius", + "date" : "Apr 26, 2020 11:07 PM", + "userId" : "4617794", + "content" : "Hi Manimaran, The TPS3840 cannot handle 700mA because it is not pass through device. I would recommend a supervisor like the TPS3840 to monitor the voltage for 2.9 UV and a load switch such as the TPS22919 that can pass through the current. A supervisor can control the EN switch on the TPS22919." + }, { + "contentId" : "3329835", + "userName" : "Manimaran Kanesan", + "rankPoints" : "340", + "rankName" : "Intellectual", + "date" : "Apr 28, 2020 3:35 AM", + "userId" : "4602090", + "content" : "Hi Marcoo, Thanks for this info, the load switch could be a solution for my application. But if you have a device similar to load switch but has two inputs and one output, the input each has enable pin or one enable pin control both inputs is great. For example the device need to be, when VBAT and VUSB is high, the single Enable if high VBAT will be the output and when Enable is low, VUSB is the output. Again the load will be 700mA. BRgds" + }, { + "contentId" : "3329926", + "userName" : "Marcoo Z", + "rankPoints" : "12020", + "rankName" : "Genius", + "date" : "Apr 28, 2020 5:37 AM", + "userId" : "4617794", + "content" : "Then your device will be something like the TPS2121. I will connect you with the team for further support." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS3840", "/support/power-management/f/196/tags/TPS63070" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900346.json b/data/json/DLP/900346.json new file mode 100644 index 0000000000000000000000000000000000000000..8265134bda6aba4d2118a56cfd6f6830b1964ca6 --- /dev/null +++ b/data/json/DLP/900346.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900346", + "reporterName" : "Lukas Brchl", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ25155: TS pin accidentally left floating instead of GND when we don't plan to use it", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 19", + "queryText" : "Part Number: BQ25155 Hi, in the latest revision of our product, we accidentally left TS pin floating and the battery management started to behave strangely. When no battery is inserted and we plug in USB to power up the VIN, the MR pin quickly goes up and then falls to the low, which means that the device won't boot because it is in the reset state. However, when we plug in the battery and USB, everything works as expected. All power rails all good no matter if the battery is inserted or not. The MR pin is weird only without the battery and we hadn't this trouble in the last revision where we had the TS pin grounded. I suppose that the TS pin needs to be grounded to be able to operate the BQ25155 without a battery. Could you please confirm this information? Best regards, Lukas", + "partNumber" : " BQ25155", + "allResponseList" : [ { + "contentId" : "3328880", + "userName" : "Raheem", + "rankPoints" : "16655", + "rankName" : "Genius", + "date" : "Apr 27, 2020 2:21 PM", + "userId" : "4697250", + "content" : "Hello, The /MR pin is pulled up to VBAT and since the battery is absent, you'll see the capacitor on battery pin get charged and discharged. This will also be seen on /MR. The VDD and PMID pins should be powered when on VIN plugin only." + }, { + "contentId" : "3328908", + "userName" : "Lukas Brchl", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 2:34 PM", + "userId" : "6092778", + "content" : "Hi, > The /MR pin is pulled up to VBAT and since the battery is absent, you'll see the capacitor on battery pin get charged and discharged Yeah, this is the expected behavior we saw on our previous revisions. The /MR was oscillating between 1.5 and 4.2 V. But we have now new revision, where we forget to ground the TS pin, and when the battery is removed the /MR is permanently pulled low (not oscillating). Could you please confirm this could be caused by TS pin grounded? Thanks, Lukas" + }, { + "contentId" : "3328970", + "userName" : "Raheem", + "rankPoints" : "16655", + "rankName" : "Genius", + "date" : "Apr 27, 2020 3:05 PM", + "userId" : "4697250", + "content" : "Hello, Can you share your schematic? What is VDD and PMID voltage when you have only VIN present? If you can write to the registers, can you try disabling the TS function and see if the behavior changes?" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25155" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900347.json b/data/json/DLP/900347.json new file mode 100644 index 0000000000000000000000000000000000000000..aa6ac8eccd9032f473a31a6daa988886325c2dd8 --- /dev/null +++ b/data/json/DLP/900347.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "900347", + "reporterName" : "Steve Green", + "rankPoints" : "340", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS7B69-Q1: TPS7B69 model", + "rankName" : "Intellectual", + "replies" : " 5", + "views" : " 19", + "queryText" : "Part Number: TPS7B69-Q1 I would also like the Tina spice macro model. I couldn't seem to do anything with the transient models listed. Steve", + "partNumber" : " TPS7B69-Q1", + "allResponseList" : [ { + "contentId" : "3329272", + "userName" : "Aaron Paxton", + "rankPoints" : "1895", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 5:45 PM", + "userId" : "3507752", + "content" : "Hey Steve, Have you tried importing the unencrypted PSPICE model into Tina? I know it's not the same level of polish but should be able to get the job done. ~ Aaron" + }, { + "contentId" : "3329388", + "userName" : "Steve Green", + "rankPoints" : "340", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 7:25 PM", + "userId" : "658090", + "content" : "I brought the files in and tried to use as a macro, but there was no TSM file. I then tried to import from the folder but nothing happened. How do I use this SIM file? Also, I downloaded the complete library. Is there anyway to imprt the whole thing without unzipping each folder and installing separately. Thanks, Steve" + }, { + "contentId" : "3329409", + "userName" : "Steve Green", + "rankPoints" : "340", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 7:43 PM", + "userId" : "658090", + "content" : "I just found where in brought in a LIB file, but I can't find a way to use it. Steve" + }, { + "contentId" : "3329415", + "userName" : "Steve Green", + "rankPoints" : "340", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 7:48 PM", + "userId" : "658090", + "content" : "OOPS. I just remembered that you use a LIB to make a macro. Success! Thanks for jogging my memory Steve" + }, { + "contentId" : "3329478", + "userName" : "Aaron Paxton", + "rankPoints" : "1895", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 8:40 PM", + "userId" : "3507752", + "content" : "Hey Steve, Glad it worked. Let me know if you run into any other roadblocks. ~ Aaron" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS7B69", "/support/power-management/f/196/tags/TPS7B69_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900348.json b/data/json/DLP/900348.json new file mode 100644 index 0000000000000000000000000000000000000000..a1031655a0e0d2106cdcc39a5e0d559310344b20 --- /dev/null +++ b/data/json/DLP/900348.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900348", + "reporterName" : "Oscar Mitchell66", + "rankPoints" : "60", + "resolutionStatus" : "", + "ticketName" : "TPS54821: Discontinuous mode existence (indicated by TINA-TI)", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 39", + "queryText" : "Part Number: TPS54821 The part's datasheet says: 7.3.2 Continuous Current Mode Operation (CCM) As a synchronous buck converter, the device normally works in CCM (Continuous Conduction Mode) under all load conditions. In Webench I can't have Vout=0.9V with Vin=8.4V at 1.25 MHz switching frequency (and a 3A load) because of the minimum on time (per 8.2.2.9.1 Minimum Output Voltage) I then export the design from Webench to TINA-TI for simulation. When I operate with Vin=5V, Vout=0.9V and 1.25MHz switching frequency the simulation runs and it appears to be operating in CCM. Great. If I increase the input voltage to 8.4V (no other changes) then the simulation runs and inspection of the inductor current shows it be operating in DCM. This would be marvelous if it really can do that, if it can't I have to do more work. I don't think this is due to Over Voltage Protection per '7.4.9 Output Overvoltage Protection (OVP)' because DCM appears to be present in the simulation well before the feedback pin reaches 0.6V So the question is: Will it behave per the TINA-TI simulation and do both CCM and DCM as required?", + "partNumber" : " TPS54821", + "allResponseList" : [ { + "contentId" : "3328430", + "userName" : "Lishuang Zhao", + "rankPoints" : "1160", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 7:30 AM", + "userId" : "4627148", + "content" : "Hi, When minimum on time is triggered, IC will turn on high side with minimum on time. Then the energy with minimum on time is larger than the needed. So the Vout will rise and trigger OVP. As datasheet metioned, \"If the VSENSE pin voltage is greater than the OVP threshold the high-side MOSFET is turned off preventing current from flowing to the output and minimizing output overshoot. When the VSENSE voltage drops lower than the OVP threshold, the high-side MOSFET is allowed to turn on at the next clock cycle.\" So i think your \"DCM\" is due to OVP. But this is not a traditional DCM. Thanks, Lishuang" + }, { + "contentId" : "3329299", + "userName" : "Oscar Mitchell66", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 6:12 PM", + "userId" : "5316715", + "content" : "But, in the TINA-TI simulation: a) this apparent DCM is exhibited in the simulation well before VSENSE approaches 0.6V b) the output voltage ends up at exactly the set voltage c) the VSENSE pin ends up at exactly 0.6V A lot of parameters appear to be passed to the macro like output voltage and switching frequency from the high level so I have no idea what is going on inside. I guess the bottom line is that I will have to limit the input voltage with a LDO since the power source is a battery that can reach well above 7.6V. (reluctance is due to there being no good fit for this and a discrete one isn't trivial) Not sure this can be marked as 'resolved' because I perceive it is currently more 'no high confidence explanation available so work around it'" + }, { + "contentId" : "3329993", + "userName" : "Lishuang Zhao", + "rankPoints" : "1160", + "rankName" : "Intellectual", + "date" : "Apr 28, 2020 6:49 AM", + "userId" : "4627148", + "content" : "Hi Oscar, For your application, can you decrease your frequency from 1.2MHz to 700KHz? If so, it will not trigger minimum on time. It can work normally when input voltage within 8.4V. Thanks, Lishuang" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS54821", "/support/power-management/f/196/tags/WEBENCH", "/support/power-management/f/196/tags/tina_2D00_ti" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900352.json b/data/json/DLP/900352.json new file mode 100644 index 0000000000000000000000000000000000000000..a863ec421951a60e717a8199f2741ea1ea59a9a4 --- /dev/null +++ b/data/json/DLP/900352.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900352", + "reporterName" : "John Pan", + "rankPoints" : "320", + "resolutionStatus" : "", + "ticketName" : "LMT86-Q1: RC selection", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 24", + "queryText" : "Part Number: LMT86-Q1 Hello, I am wondering how R and C were selected for the temperature sensor LMT86/87 output circuit in different TIDA? 1) TIDA-00774 specifies RC values as R42=10K, and C=0.1 uF 2) TIDA-00901 only has a C=0.1 uF 3) TIDA-00281 doesn't specify R and C Q1: Is the selection designed to filter noise caused by the MOSFET switching? If yes, could you please provide a guideline on how small the cutoff frequency should be compared to the switching frequency? 2) Is the selection designed to filter noise to microcontroller? If yes, could you please provide a guideline on how the time constant calculated from the RC values in relation to the sample time found in the microcontroller datasheet? I will appreciate you could provide the reasoning for this selection? I see other design applications using much lower R value (say 100 ohms instead of 10k) and much lower C value (say 3300 pF). Thanks, John", + "partNumber" : " LMT86-Q1", + "allResponseList" : [ { + "contentId" : "3329523", + "userName" : "Jalen Tate89", + "rankPoints" : "2900", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 9:18 PM", + "userId" : "4697232", + "content" : "John, For the LMT8x-Q1 device, the RC filter depends on your application. What is your expected capacitive load on the temperature sensor output? Referencing section 8.4.3 of the datasheet, the RC filter is only needed when the capacitive load (Cload) is > 1100 pF. This is to due to output limitations of the LMT8x-Q1 device. You can follow the recommended series resistance values in Table 4 for the Rs value. Jalen" + }, { + "contentId" : "3329560", + "userName" : "John Pan", + "rankPoints" : "320", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 10:19 PM", + "userId" : "6231803", + "content" : "Hi Jalen, Thank you very much for your reply. However, I feel that my question has not been addressed. My questions are why three different TIDAs chose three different R and C and how they chose these values. Thanks, John" + } ], + "tags" : [ "/support/sensors/f/1023/tags/TIDA_2D00_00901", "/support/sensors/f/1023/tags/TIDA_2D00_00774", "/support/sensors/f/1023/tags/LMT86", "/support/sensors/f/1023/tags/TIDA_2D00_00281", "/support/sensors/f/1023/tags/LMT86_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900361.json b/data/json/DLP/900361.json new file mode 100644 index 0000000000000000000000000000000000000000..aeb7c0fe83099831a4db13d8fb6c68dce5e53eba --- /dev/null +++ b/data/json/DLP/900361.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900361", + "reporterName" : "user6204093", + "rankPoints" : "30", + "resolutionStatus" : "", + "ticketName" : "TPS63070: Vin (min)", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 30", + "queryText" : "Part Number: TPS63070 Hi, Could you tell me about Vin(min) ? - once started Vout>=3.0 V --> 2.0 V min - once started Vout<3.0 V --> ??? - for start-up Vout<3.0 V --> 3.0 V min - for start-up Vout>3.0 V --> ??? Regards, Tomoya", + "partNumber" : " TPS63070", + "allResponseList" : [ { + "contentId" : "3328407", + "userName" : "Milos", + "rankPoints" : "7260", + "rankName" : "Expert", + "date" : "Apr 27, 2020 7:13 AM", + "userId" : "5692358", + "content" : "Hi Tomoya, Thank you for reaching out. Could you please clarify the question? Best regards, Milos" + } ], + "tags" : [ "/support/power-management/f/196/tags/start_2D00_up", "/support/power-management/f/196/tags/TPS63070", "/support/power-management/f/196/tags/VIN" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900370.json b/data/json/DLP/900370.json new file mode 100644 index 0000000000000000000000000000000000000000..410ba3802350e055a255254825f1719d9fcd3e1f --- /dev/null +++ b/data/json/DLP/900370.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900370", + "reporterName" : "Eddie Chou", + "rankPoints" : "1170", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM74: LM74 temperature sensor accuracy issue", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 23", + "queryText" : "Part Number: LM74 Hi Team, My customer happened LM74 accuracy issue, they test LM74 at ambient 25 degree but LM74 output value is higher than sensor case and PCB (under sensor) 2.5 deg. customer working temperature range is (-10˚C to +65 ˚C) and the accuracy should under 1.25 degree. Does 2.5 degree higher than test temperature is normal? Thanks & Regards Eddie", + "partNumber" : " LM74", + "allResponseList" : [ { + "contentId" : "3328222", + "userName" : "Josh Wyatt", + "rankPoints" : "61360", + "rankName" : "Guru", + "date" : "Apr 27, 2020 2:32 AM", + "userId" : "614", + "content" : "Eddie - That measurement (+2.5C) would exceed the part spec in that operating range - would you please help get the details of how they arrived at this conclusion and would you please get the schematic and layout of the customer implementation for us?" + }, { + "contentId" : "3328886", + "userName" : "Josh Wyatt", + "rankPoints" : "61360", + "rankName" : "Guru", + "date" : "Apr 27, 2020 2:24 PM", + "userId" : "614", + "content" : "Eddie - closing this post, as you moved this to email, due to the confidential nature of the customer drawings." + } ], + "tags" : [ "/support/sensors/f/1023/tags/LM74" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900375.json b/data/json/DLP/900375.json new file mode 100644 index 0000000000000000000000000000000000000000..8ef269a87f62fcb9d6ff5e72e5213fde14dc5069 --- /dev/null +++ b/data/json/DLP/900375.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900375", + "reporterName" : "Tommy Tzeng", + "rankPoints" : "1320", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ27542-G1: discharge issue at -20 degree", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 13", + "queryText" : "Part Number: BQ27542-G1 Hi Team, we use GPC to get the report,but the pack directly discharge RSOC at -20 degrees,and the RSOC is about 8x% and directly to 0%, and the customer system can not turn on at -20 degree,so what happen to cause this problem? there problem with the battery specificaion? please kindly refer the attached. ICP535172AWRU pre spec_STD(4.4V)160928.pdf AKH08-20200422.gg.csv AKH08-(-20C)放置LOG.xlsx AKH08_GPC_Rb.zip AKH08_GPC_Chem ID.zip AKH08_GPC_Chem ID-report.zip AKH08_GPC_Rb-report.zip", + "partNumber" : " BQ27542-G1", + "allResponseList" : [ { + "contentId" : "3329085", + "userName" : "Damian Lewis", + "rankPoints" : "33210", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 4:02 PM", + "userId" : "69960", + "content" : "Hello Tommy, The drop to 0% is because Terminate Voltage 3200mV was reached. We need to understand why the SOC was being overestimated. Can you log the data with FCC, Rem Cap and True/unfiltered SOC being reported." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ27542_2D00_G1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900378.json b/data/json/DLP/900378.json new file mode 100644 index 0000000000000000000000000000000000000000..2e1691906ffccf2deaa1c0c6809d0039106e7f48 --- /dev/null +++ b/data/json/DLP/900378.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900378", + "reporterName" : "Yumiko hayashi", + "rankPoints" : "150", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS61170: Phantom power application circuit", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 23", + "queryText" : "Part Number: TPS61170 Hi sir, I am puzzled on 48v phantom power circuit. I found in this product's datasheet a schematic to boost up to 48V for phantom power. I'm a little confused though because it lists a maximum output voltage of 38V. I tried to create the schematic in webench but it again wouldn't let me use a voltage higher than 38. The schematic appears to have additional capacitors and diodes than a typical boost topology. Could you explain how those are used to achieve a voltage higher than the listed maximum output voltage? Also, do you have any other DC-DC converters you would recommend for phantom power applications? Thank you.", + "partNumber" : " TPS61170", + "allResponseList" : [ { + "contentId" : "3328414", + "userName" : "Helen chen", + "rankPoints" : "32965", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 7:20 AM", + "userId" : "4197150", + "content" : "Dear Sir, Please check Figure 20. It use a charge pump circuit to achieve 48V output." + }, { + "contentId" : "3328451", + "userName" : "Yumiko hayashi", + "rankPoints" : "150", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 7:52 AM", + "userId" : "6150008", + "content" : "Thank u for your Response. do you have any other DC-DC converters you would recommend for phantom power applications?" + }, { + "contentId" : "3329771", + "userName" : "Helen chen", + "rankPoints" : "32965", + "rankName" : "Mastermind", + "date" : "Apr 28, 2020 2:17 AM", + "userId" : "4197150", + "content" : "Dear Sir, It depend on your output power. You can also choose TPS61175 with charge pump circuit. Or choose LM5001 if the output power is not big." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS61170" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900381.json b/data/json/DLP/900381.json new file mode 100644 index 0000000000000000000000000000000000000000..966e0fdbdd43114fb250c83b8c33e2bfb48af267 --- /dev/null +++ b/data/json/DLP/900381.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900381", + "reporterName" : "Darren (FAE)", + "rankPoints" : "510", + "resolutionStatus" : "", + "ticketName" : "TPS51218: Help with Preset Switching Frequency", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 26", + "queryText" : "Part Number: TPS51218 I have a customer asking about using Rrf values different from those shown in Table 1 in the DS. The DS specifies 4 different resistances to achieve 4 different switching frequency \"presets\" Would changing the Rrf to GND resistor to a value not in the table, change the switching frequency to a value not in the table? IE, Table 1 says 470kΩ = Fsw of 290kHz, then 200kΩ = Fsw of 340kHz, etc... Would a resistor value of 330kΩ for example, still have a Fsw of 290kHz, or 340kHz? or would it be different? Also, page 4 of the DS shows for Fsw, that with a 470kΩ resistor, Fsw = 266kHz to 314kHz....But this was measured at 25℃...so is there that much discrepancy in the Fsw setting? In short, could you clarify what the \"preset\" definition is, and what happens if a different resistor value is used that those listed in Table 1? Thanks! Darren", + "partNumber" : " TPS51218", + "allResponseList" : [ { + "contentId" : "3328553", + "userName" : "Yuchang Zhang", + "rankPoints" : "8080", + "rankName" : "Expert", + "date" : "Apr 27, 2020 9:40 AM", + "userId" : "4780235", + "content" : "Hi, As you may know this is an old part, sorry I checked we have no related data with different RF resistors, can you just recommend customer to follow the table to make it? I think the preset table value should be verified a lot. and also as you know, Dcap mode is with pseudo-constant frequency, which is related to VIN/Vout, so some variation happen is normal. Yuchang" + }, { + "contentId" : "3328982", + "userName" : "Darren (FAE)", + "rankPoints" : "510", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 3:16 PM", + "userId" : "5987539", + "content" : "Hi Yuchang, Let me try again. The datasheet says: \"The first 250 μs calibrates the switching frequency setting resistance attached at RF to GND and stores the switching frequency code in internal registers.\" My question is, does the RF input have some kind of comparator setup that looks at voltage at the pin, and stores the comparator result in internal registers (4 options means 2 bits? 00, 01, 10, 11) which is what is used to decide the switching frequency? If you can't find this info for this device (it is old), many other devices have similar tables where Rrf and Fsw are given. Are these inputs comparators as well, to store the result? Regards, Darren" + }, { + "contentId" : "3329942", + "userName" : "Yuchang Zhang", + "rankPoints" : "8080", + "rankName" : "Expert", + "date" : "Apr 28, 2020 5:54 AM", + "userId" : "4780235", + "content" : "Darren, I know what you mean, but so far I have no files to confirm this, I will try to check with design team, maybe tomorrow or later I can give some feedback. before this, please just follow the table to do it. Yuchang" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS51218" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900384.json b/data/json/DLP/900384.json new file mode 100644 index 0000000000000000000000000000000000000000..6c9492a5c5f0e96cb8642c4011ccc992a5f3d101 --- /dev/null +++ b/data/json/DLP/900384.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900384", + "reporterName" : "Mark0007", + "rankPoints" : "945", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS61170: Max output voltage", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 19", + "queryText" : "Part Number: TPS61170 Hi sir, I can find max Vout is 38V in datasheet. TPS61170 - 1.2A Switch, 38V High Voltage Boost Converter in 2x2mm QFN Package however I can find 48-V Phantom Power Application Circuit in page22. /lit/ds/symlink/tps61170.pdf?ts=1587955799541 Can this device output 48V voltage? But I can not create a 48V output circuit by webench. I am a little confused on this. your suggestion will be appreciated. Thank u. Regards,", + "partNumber" : " TPS61170", + "allResponseList" : [ { + "contentId" : "3328418", + "userName" : "Helen chen", + "rankPoints" : "32965", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 7:23 AM", + "userId" : "4197150", + "content" : "Dear Sir, Please check Figure 20. it achieves 48V output by a charge pump circuit." + }, { + "contentId" : "3329665", + "userName" : "Mark0007", + "rankPoints" : "945", + "rankName" : "Intellectual", + "date" : "Apr 28, 2020 12:21 AM", + "userId" : "6175619", + "content" : "very helpful, thank u." + }, { + "contentId" : "3329792", + "userName" : "Helen chen", + "rankPoints" : "32965", + "rankName" : "Mastermind", + "date" : "Apr 28, 2020 2:43 AM", + "userId" : "4197150", + "content" : "You're welcome. Good Luck!" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS61170" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900385.json b/data/json/DLP/900385.json new file mode 100644 index 0000000000000000000000000000000000000000..c9067bce4e5f4d60dbfdd5167261b080320d0d46 --- /dev/null +++ b/data/json/DLP/900385.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900385", + "reporterName" : "Xing He", + "rankPoints" : "360", + "resolutionStatus" : "Resolved", + "ticketName" : "UCC27524: Pulled Low of OUTA and INA", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 9", + "queryText" : "Part Number: UCC27524 Hi Team, I only use one channel OUBT of UCC27524. I don't need to use output channel A of UCC27524. Do I need to pull both OUTA and INA low? What I need to for this two Pins? Thank you.", + "partNumber" : " UCC27524", + "allResponseList" : [ { + "contentId" : "3328668", + "userName" : "Don Dapkus", + "rankPoints" : "174575", + "rankName" : "Guru", + "date" : "Apr 27, 2020 12:06 PM", + "userId" : "1027", + "content" : "Hi, Xing, Best practice would be to pull INA low, and leave OUTA open. If this answered your question, please press the Green button." + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC27524" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900388.json b/data/json/DLP/900388.json new file mode 100644 index 0000000000000000000000000000000000000000..0ac7ee17caf4ccf6622af963e28e64ef6c7f8953 --- /dev/null +++ b/data/json/DLP/900388.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900388", + "reporterName" : "Greg", + "rankPoints" : "1205", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS4H160-Q1: TPS4H160 driven by an MCU on a decoupled ground", + "rankName" : "Expert", + "replies" : " 2", + "views" : " 34", + "queryText" : "Part Number: TPS4H160-Q1 Hicompany Support, I plan to use a common mode choke to filter the incoming 24V power. The amperage rating of the choke is less than the expected draw from the loads on multiple TPS4H160 power switches, so I would like to supply the TPS4H160 switches with the non-filtered incoming 24V supply. But since the grounds of the MCU and TPS4H160 circuits would not be exactly the same, I am wondering if it will work, and if there are any precautions I need to take. At DC, the grounds are essentially the same since the DC resistance of the common mode choke is about 65 mOhms per coil. But there is significant impedance to AC waveforms. The inductance of each coil is about 470 uH. Here is a simplified schematic showing the circuit with the grounds and supplies. I've shown example circuits for both the A and B versions of the TPS4H160. In particular, please consider the following questions: 1. Since the frequency of switching is very low, will the TPS4H160 behave properly given the ground differences I've outlined? The rising edge of the control input is an AC waveform, but only for the duration of the leading and trailing edges. The circuit should stabilize before the next edge occurs. Will the inductance of the choke cause problems with overshoot and undershoot? If so, can this be mitigated by slowing down the edges, or are there components I can add to clamp them? 2. Are there any issues with +5V and its ground supplying DIAG_EN, THER, SEH/SEL, or the fault LEDs? 3. The B version has the additional issue of the MCU accurately measuring the Current Sense (CS pin) output. Is the CS output a current source? If so, would it be permissible to connect that output to the MCU's ground? If it is truly a current source, wouldn't the voltage dropped across the resistor be accurate even though the grounds are dissimilar? But since the grounds are connected to each other via a 470 uH inductor, I assume the frequency response would be affected and the inductance could affect the current source circuit. If this is a dicey configuration, I won't do it and I will need to isolate the circuit. Or I could use a much beefier common mode choke and supply the TPS4H160 drivers with filtered 24V. Thank you very much for the help. Regards, Greg", + "partNumber" : " TPS4H160-Q1", + "allResponseList" : [ { + "contentId" : "3329496", + "userName" : "Timothy Logan", + "rankPoints" : "5600", + "rankName" : "Expert", + "date" : "Apr 27, 2020 8:57 PM", + "userId" : "1849899", + "content" : "Greg, Could you elaborate on what exactly the 5V DC Switcher is and what its function is here? Generally we discourage having separate ground planes as they tend to be a bit unpredictable and would not represent a use case that we have tested or validated with the device's use case. It's an interesting approach, however I would say the safe approach here would be to isolate your circuit. The 5V into the control pins generally will not be an issue. The pins are rated for an absolute max of 7V. If there is anything weird going on with the ground pins though that would cause the potential to rise above the absolute max relatively it would cause problems. The CS pin is a current source. Essentially what happens is there is a current mirror inside the device that scales down the output current and outputs it to the CS pin. That current is run over an external resistor to convert it to a voltage and then the MCU's ADC is able to sample it to determine what the output current of the device is (see /lit/an/slvae08/slvae08.pdf?ts=1588020757581 for a bunch of detail on the inner workings). The inductively connected grounds here will cause some uncertainty with this pin though as any slight current variation on that pin will cause an inaccurate current reading (we are talking about mA coming out of the pin). Will it work? Maybe- however I can't really guarantee it. Probably not the answer you were looking for but the safer and more robust solution here would be to isolate your circuit." + }, { + "contentId" : "3329606", + "userName" : "Greg", + "rankPoints" : "1205", + "rankName" : "Expert", + "date" : "Apr 27, 2020 10:58 PM", + "userId" : "675313", + "content" : "Hi Timothy, I included the 5V switcher in the schematic to show how the MCU was powered. Yeah, it wasn't the answer I was hoping for, but I thought I might as well ask just in case it was possible. I can see the possibility of inductive bounce causing a difference between the two grounds that could be destructive to those inputs. Thanks for the link to the app report on current sense in high-side switches. I'm sure I'll enjoy reading it. Thank you for the help. Regards, Greg" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS4H160_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900390.json b/data/json/DLP/900390.json new file mode 100644 index 0000000000000000000000000000000000000000..80449b7b96cdd8c404b14be8348093d4c339c1bd --- /dev/null +++ b/data/json/DLP/900390.json @@ -0,0 +1,79 @@ +{ + "ticketNumber" : "900390", + "reporterName" : "Agate", + "rankPoints" : "790", + "resolutionStatus" : "", + "ticketName" : "CCS/IWR1843BOOST: The cloud point question ( people counting lab)", + "rankName" : "Intellectual", + "replies" : " 8", + "views" : " 24", + "queryText" : "Part Number: IWR1843BOOST Tool/software: Code Composer Studio Dearcompany The below diagram shows the cloud point range , how to wider this region ? It's effected by which parameters ? Why some module the direction is different with the same code ? BR", + "partNumber" : " IWR1843BOOST", + "allResponseList" : [ { + "contentId" : "3328990", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 3:19 PM", + "userId" : "5118664", + "content" : "Hi Agate, That is a strange FOV, typically it would be centered around X = 0. In general, all of our EVMs have about 120 degrees of Azimuth FOV, with variable elevation FOV. What demo are you running, and what EVM are you using? Regards, Justin" + }, { + "contentId" : "3329028", + "userName" : "Agate", + "rankPoints" : "790", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 3:32 PM", + "userId" : "6220574", + "content" : "Dearcompany It's the same setting but the board it's a type of our design , Antenna will effect this FOV performance ? Customer don't agree antenna and IC in the same side we need to try more and different hardware to our customers . BR" + }, { + "contentId" : "3329041", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 3:37 PM", + "userId" : "5118664", + "content" : "Hi Agate, The Antenna will effect the performance. Specifically, the layout effects the Angle of Arrival function - if you change the layout without changing AoA in software, you will get strange results like the ones above. Can you confirm that the Virtual Antenna pattern is the same as ISK? Regards, Justin" + }, { + "contentId" : "3329050", + "userName" : "Agate", + "rankPoints" : "790", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 3:45 PM", + "userId" : "6220574", + "content" : "Dearcompany Becuase we are focus on non-automotive market , every customer have their requirement , especial the hardware layout . So 100% the hardware layout will be changed , The AOA we are keep the demo setting becuase we don;t how to change with hardware Can help us how to change these setting. ? The virtual channel setting are follow ISK but AOA keep the same. Our Antenna Pattern is 90% the same withcompany antenna performance and gain & bandwidth is large thancompany BR" + }, { + "contentId" : "3329058", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 3:49 PM", + "userId" : "5118664", + "content" : "Hi Agate, If the antenna layout is the same as thecompany layout, the AOA algorithm will work, regardless of hardware or antenna gain. Which software are you running on device? Are you able to show the antenna layout? Regards, Justin" + }, { + "contentId" : "3329080", + "userName" : "Agate", + "rankPoints" : "790", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 4:01 PM", + "userId" : "6220574", + "content" : "Dearcompany The antenna layout we have discussed . I don't know how to setting AOA part. 　　 　　show two layout for you to reference. Our customer side suggestion much configuration . now we are try run some type only but performance not good now. 　 BR" + }, { + "contentId" : "3329094", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 4:06 PM", + "userId" : "5118664", + "content" : "You are using 3D People Counting, correct? Do you have the antenna geometry configurations set properly for these as discussed in the other thread? Regards, Justin" + }, { + "contentId" : "3329115", + "userName" : "Agate", + "rankPoints" : "790", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 4:15 PM", + "userId" : "6220574", + "content" : "Dearcompany We have use 3D people counting and HAVC . antenna geometry we understand how to setting , you have teach us but AOA we don't know how to fit antenna . BR" + } ], + "tags" : [ "/support/sensors/f/1023/tags/code%2bComposer%2bstudio", "/support/sensors/f/1023/tags/IWR1843BOOST" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900392.json b/data/json/DLP/900392.json new file mode 100644 index 0000000000000000000000000000000000000000..db9fabbf79c9b3f6f923d224e077939b373e82e9 --- /dev/null +++ b/data/json/DLP/900392.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900392", + "reporterName" : "Agate", + "rankPoints" : "790", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "CCS/IWR6843ISK: CFAR Range vs CFAR Azimuth ( People Counintg)", + "rankName" : "Intellectual", + "replies" : " 3", + "views" : " 13", + "queryText" : "Part Number: IWR6843ISK Tool/software: Code Composer Studio Dearcompany Could give some more description for these two parameters ? Which setting is the best ? What the impact of these ? We only can tuning hihger and lower only ? BR", + "partNumber" : " IWR6843ISK", + "allResponseList" : [ { + "contentId" : "3328987", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 3:17 PM", + "userId" : "5118664", + "content" : "Hi, CFAR is a comparative algorithm that looks at energy in a current Range/Azimuth bin and compares it to the average energy of the bins around it. This is first done in the range direction, then done in the Angle direction. A bin has to pass both checks to become a point. The larger a CFAR threshold is, the stronger a reflection has to be to count as a point. We think the default values are best - otherwise we would have different defaults. Regards, Justin" + }, { + "contentId" : "3329042", + "userName" : "Agate", + "rankPoints" : "790", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 3:39 PM", + "userId" : "6220574", + "content" : "Dearcompany Default values is best for EVB only , we are try more type of our design but every type are different . Product design for end user need follow customer spec . only less information is hard to reach customer spec. and requirements If have tuning guide for product design will shorten time to market period. BR" + }, { + "contentId" : "3329051", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 3:45 PM", + "userId" : "5118664", + "content" : "Hi Agate, In that case - there isn't a single best value, but for people counting, you need to understand the following on CFAR: 1. In the ideal case, you will see a point cloud roughly the size of the person when they are moving through the area - otherwise you won't get detected points, or you will get a few detected points when the person is sitting/laying/standing still. 2. You want to remove noise from other sources in the point cloud. Essentially, you want to tune CFAR so that by looking at the point cloud, you can tell where a person is when they are walking around. Before you dive too deep into this, we need to resolve the other thread you have open on the point cloud FOV. Regards, Justin" + } ], + "tags" : [ "/support/sensors/f/1023/tags/code%2bComposer%2bstudio", "/support/sensors/f/1023/tags/IWR6843ISK" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900393.json b/data/json/DLP/900393.json new file mode 100644 index 0000000000000000000000000000000000000000..e9b6d7db0e5b0373a9036173afa4030c6a4f1b9f --- /dev/null +++ b/data/json/DLP/900393.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900393", + "reporterName" : "Ian Wang", + "rankPoints" : "15535", + "resolutionStatus" : "", + "ticketName" : "TPS74801-Q1: TPS74801-Q1", + "rankName" : "Genius", + "replies" : " 2", + "views" : " 12", + "queryText" : "Part Number: TPS74801-Q1 Hi Sir, My customer looking for LDO with below condition, Input: 2.5V~5V Output: 0.9V/1.5A Q-Grade I suggest using TPS74801-Q1 for them, pls help for questions from customer as below, When Vin 3.3V, Vout 0.9V/1A, TA=85℃, How about power consumption and temperature of TPS74801? Is it workable? Thanks, Ian.", + "partNumber" : " TPS74801-Q1", + "allResponseList" : [ { + "contentId" : "3329275", + "userName" : "Aaron Paxton", + "rankPoints" : "1895", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 5:46 PM", + "userId" : "3507752", + "content" : "Hey Ian, Given that's 2.4W of dissipation, I think you will have trouble with that configuration. Is it possible to use regulate from a lower voltage rail in the system to limit the dissipation across the device? ~ Aaron" + }, { + "contentId" : "3329757", + "userName" : "Ian Wang", + "rankPoints" : "15535", + "rankName" : "Genius", + "date" : "Apr 28, 2020 2:11 AM", + "userId" : "12993", + "content" : "Hi Aaron, Thanks, or do we have suitable solution for these condition? Input: 2.5V~5V Output: 0.9V/1.5A Q-Grade Thanks, Ian." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS74801_2D00_Q1", "/support/power-management/f/196/tags/TPS74801" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900399.json b/data/json/DLP/900399.json new file mode 100644 index 0000000000000000000000000000000000000000..07a4dd75da67102a7fbba29e4968214ac3e93469 --- /dev/null +++ b/data/json/DLP/900399.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900399", + "reporterName" : "oM", + "rankPoints" : "70", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM22674: LM22674-5 Ripple Voltage", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 8", + "queryText" : "Part Number: LM22674 Hi, Could anyone share the peak to peak ripple voltage of LM22674-5. Couldn't found out from datasheet. Kindly reply. Warm regards, Monisha O M", + "partNumber" : " LM22674", + "allResponseList" : [ { + "contentId" : "3328557", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 27, 2020 9:44 AM", + "userId" : "3498075", + "content" : "Hi Monisha, Please simulate your circuit in Webench for detail performance data B R Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM22674" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900402.json b/data/json/DLP/900402.json new file mode 100644 index 0000000000000000000000000000000000000000..61d4c55e6dcfb2d91a8303edf3df9149635356c9 --- /dev/null +++ b/data/json/DLP/900402.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900402", + "reporterName" : "Roy Chou1", + "rankPoints" : "1580", + "resolutionStatus" : "", + "ticketName" : "LM25180-Q1: Device suggestion.", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 11", + "queryText" : "Part Number: LM25180-Q1 Hi Team, My customer is searching device which could meet EN50155 spec. (isolation) and Vin = 13V-36V Could you help suggest device which could meet below requirement? 1. Vout = 24V/4A 2. Vout = 12V/3A 3. Vout = 5V/0.5A Regards, Roy", + "partNumber" : " LM25180-Q1", + "allResponseList" : [ { + "contentId" : "3328320", + "userName" : "Roy Chou1", + "rankPoints" : "1580", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 5:51 AM", + "userId" : "6162312", + "content" : "attached power tree" + }, { + "contentId" : "3328558", + "userName" : "Andy Chen", + "rankPoints" : "10805", + "rankName" : "Genius", + "date" : "Apr 27, 2020 9:47 AM", + "userId" : "3498075", + "content" : "Hi Roy, LM25180 can support 5V/0.4A output, for load up to 4A, you may checkcompany flyback controller B R Andy" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM25180_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900404.json b/data/json/DLP/900404.json new file mode 100644 index 0000000000000000000000000000000000000000..77a1ddb433b0828cdcf309868558c8d2ce32914f --- /dev/null +++ b/data/json/DLP/900404.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900404", + "reporterName" : "THOMAS RANZ", + "rankPoints" : "30", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ77905: Is the BQ77905 series battery protection chips directly compatible with the BQ76200 high-side driver chip?", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 11", + "queryText" : "Part Number: BQ77905 Hi: I am still looking at using the BQ77905 battery protection chip for a pack-side project. Are the BQ77905 battery protector and 76200 high-side mosfet driver fully compatible? I need a simple solution with minimum parts count and low power drain. Thnaks, Tom", + "partNumber" : " BQ77905", + "allResponseList" : [ { + "contentId" : "3328912", + "userName" : "WM5295", + "rankPoints" : "39810", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 2:36 PM", + "userId" : "17523", + "content" : "Hi Thomas, Yes and no. The BQ77905 CHG and DSG will drive the CHG_EN and DSG_EN inputs, check the voltage levels, a series resistor or even a divider may be desired for the maximum conditions. The BQ76200 will add quiescent current, as will the divider on the inputs if you use it. Being a simple low power protector the BQ77905 supports low side switching, the LD input is intended for low side switching. If your configuration needs LD for fault recovery you will need to design some method to control the pin. That might be a transistor with pull ups, they will take some bias current, or your system may have some other mechanism available for control." + }, { + "contentId" : "3329318", + "userName" : "THOMAS RANZ", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 6:25 PM", + "userId" : "4925388", + "content" : "Looking further at the BQ76200 specs I see that the minimum Batt voltage is +8.... that could be a problem when a pack is deep discharged. I am currently using a ABLIC S-8254AAW chip, it uses p-channel mosfets to control the charging and discharging. Would it not be possible to use transistors and the BQ77905 to control p-channel fets in a similar fashion? If anyone has done this please give an example circuit or description of how it was accomplished. Tom" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ76200", "/support/power-management/f/196/tags/_2300_%2bBQ77905%2b_2300_%2bBQ76200", "/support/power-management/f/196/tags/BQ77905" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900409.json b/data/json/DLP/900409.json new file mode 100644 index 0000000000000000000000000000000000000000..bfb70eacf5c83f1687269d5809daef70dfeffc32 --- /dev/null +++ b/data/json/DLP/900409.json @@ -0,0 +1,15 @@ +{ + "ticketNumber" : "900409", + "reporterName" : "Ian Wang", + "rankPoints" : "15535", + "resolutionStatus" : "", + "ticketName" : "BQ24259: bq24259", + "rankName" : "Genius", + "replies" : " 0", + "views" : " 5", + "queryText" : "Part Number: BQ24259 Hi Sir, My customer using bq24259 measure change curve, It will drop to re-change voltage after stop change few minutes, then repeat it. Does it make sense?", + "partNumber" : " BQ24259", + "allResponseList" : [ ], + "tags" : [ "/support/power-management/f/196/tags/BQ24259" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900412.json b/data/json/DLP/900412.json new file mode 100644 index 0000000000000000000000000000000000000000..196a53c4e300773e7988012e282c3fc31094568f --- /dev/null +++ b/data/json/DLP/900412.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900412", + "reporterName" : "Rich templeton", + "rankPoints" : "60", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ27750: How to select battery chemistry on BQ studio?", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 9", + "queryText" : "Part Number: BQ27750 I am connecting the BQ27750 to a LP735977JH( https://www.jauch.com/downloadfile/5c651f00637eeb997b85c8a1241fde6d5/product_safety_data_sheet_lpxxxxxxjh_1s1p_3.7v_2019_.pdf) battery. In BQstudio I think that this battery chemistry corresponds to \"0100 LiCoO2/graphitized carbon\" is this correct? Also why is there different model numbers on the \"Chemistry Programming\" section of BQStudio? Does it matter which one I select? Thanks for your help!", + "partNumber" : " BQ27750", + "allResponseList" : [ { + "contentId" : "3329222", + "userName" : "Rushi Dalal38", + "rankPoints" : "210", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 5:13 PM", + "userId" : "4375016", + "content" : "Hi Rich, Please use GPC Chem tool to find the closest chemistry match in our database. This tool will help you find the closest chemistry model to the battery you wish to use. Information can be found at this link: /tool/GPCCHEM There is a useful video on this page that can walk you through the process. Thanks, Rushi" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ27750", "/support/power-management/f/196/tags/bqStudio" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900413.json b/data/json/DLP/900413.json new file mode 100644 index 0000000000000000000000000000000000000000..db141a557470f6438ff1904f66a647281d412e95 --- /dev/null +++ b/data/json/DLP/900413.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900413", + "reporterName" : "Hemon Dey1", + "rankPoints" : "30", + "resolutionStatus" : "", + "ticketName" : "TPS1H100-Q1: OUT voltage not present despite VS receiving power", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 17", + "queryText" : "Part Number: TPS1H100-Q1 Greetings TI, I have a design that utilises the TPS1H100BQPWPRQ1 as shown below: The input voltage can go as high as 36V before the OVP circuit cuts in, and I have verified that VS pins 8,9,10 have voltage present. However pins OUT 5,6,7 don't appear to be energised and I'm confused. Is there something in the schematic that isn't right? I thought that perhaps I have a fault in the Ground network, so I replaced R25 with a direct short to GND, but still no output. The current limit has been set to 1.8A using R10. The voltage on CS appears to be 0V, which is confusing as well. Can you please help? Best regards, Hemon Dey Quantum Sensing Limited", + "partNumber" : " TPS1H100-Q1", + "allResponseList" : [ { + "contentId" : "3328926", + "userName" : "Anthony P Pham", + "rankPoints" : "1890", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 2:41 PM", + "userId" : "6169362", + "content" : "Hi Hemon, Welcome to E2E! The CS voltage being a very load voltage indicates an open load or a short to battery battery. Would you be able to try out a test load and check for any shorts?" + }, { + "contentId" : "3329620", + "userName" : "Hemon Dey1", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 11:20 PM", + "userId" : "6333549", + "content" : "Hi Anthony, Thanks for your prompt reponse. Anthony P Pham Would you be able to try out a test load and check for any shorts? Yes, I am able to bypass the current limiter and power the board, and it powers up just fine and works. However with the current limiter in place, the voltage just never makes its way to the OUT pins. Any ideas I can try? Regards, Hemon" + }, { + "contentId" : "3330099", + "userName" : "Hemon Dey1", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 28, 2020 8:54 AM", + "userId" : "6333549", + "content" : "I think I worked out why the IC is misbehaving in this way. There are two issues here, which I'm hoping you can verify: 1/ I think the Ground Network is an issue, as the IC behaves a lot more predictably when R25 is replaced with a zero ohm link. I suspect this is because R10 and R23 are not referencing the the IC ground, but going via the Ground Network. This could have the offset voltage from D11 in its path, which could throw off the thresholds?? I understand that this Ground Network is for detecting ground disconnections, is that right? In our case this IC is feeds the rest of the circuit, and really unlikely to ever have the ground disconnected - so is it safe for R25 to be zero linked all the time? 2/ The IN signal is connected to 5V line, which is only energised when the OUT signal is energised (via a buck regulator on the main circuit, post this IC). I'm using this current limiter as a gateway device into the board, rather than a current limit controller out of the board. Unfortunately the IN signal can only tolerate voltages up to 7V abs max. Do you have any suggestions as to how this IN pin can be configured so that it defaults to ON when the VS voltage is present? Unfortunately for us, this IC is already part of our 2nd generation PCB - is there some simple way the IN signal can be asserted without putting excessive voltage on it from VS? .... I'm thinking perhaps a 5V zener with series resistor might do the trick, but am I missing something here? Regards, Hemon" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS1H100_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900416.json b/data/json/DLP/900416.json new file mode 100644 index 0000000000000000000000000000000000000000..e735eed15d60289897705a21ea811a9a14c9e30a --- /dev/null +++ b/data/json/DLP/900416.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900416", + "reporterName" : "Chester Nepomuceno", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC29002: High Voltage, High-side Current Sensing Application for Load Share Controller", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 35", + "queryText" : "Part Number: UCC29002 Hi, I am working on a project that will be using the UCC29002 on a 24V power stage. Referring from the datasheet, figure 5 suggests a circuit configuration for high voltage application, however this recommended circuit is not applicable in my project because the 24V power stage shares the same ground with the 5.1V and 3.3V power stages. That means I have to place the sense resistor along the positive 24V rail and I need to do some workaround to maintain safe voltage levels on the CS+, CS- and ADJ pins. I have a couple of questions: 1. Can you give me a recommendation on a circuit configuration that will input safe voltage levels on CS+ and CS- from a sense resistor along the positive 24V rail? I am planning to insert the INA139 current shunt monitor across the sense resistor and make its output enter the current sense amplifier of the UCC29002 in non-inverting amplifier configuration. Is this a good idea? 2. The 24V power stage has a feedback circuit based on TL431 and an optocoupler combination. I would like to ask on how to effectively attach the ADJ pin on this kind of high voltage feedback circuit. Is there a way to do this? Thanks, Chester", + "partNumber" : " UCC29002", + "allResponseList" : [ { + "contentId" : "3328619", + "userName" : "John Griffin1", + "rankPoints" : "32175", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 11:12 AM", + "userId" : "1693693", + "content" : "Hello Chester Attached is a reference document that details suggestions for application issues with the UCC29002 load share controller.. Page 8 shows a recommended circuit for high side current sensing with a high voltage output. You can set the CS+,CS- input levels to be within the operating voltage range for the CS amplifier and there should be no need to use a part like the INA1139. All of the applications I am familiar with use a resistor current shunt with the internal current sense amplifier. I dont understand your second question. The power module you are controlling is required to have separate output and sense lines. There is a small resistor (usually 100 Ohms or so) between Vout and Sense +. The UCC29002 controls the signal on S+ . This controls the feedback signal within the power module and raises or lowers Vout accordingly. Using a TL431 with optocoupler may be part of this feeback loop and the UCC290002 is designed to operate in such a system. Regards John0726.UCC29002_REF.pdf" + }, { + "contentId" : "3329935", + "userName" : "Chester Nepomuceno", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 28, 2020 5:49 AM", + "userId" : "6333440", + "content" : "Hi John, Thanks for the suggestion on the input of the CS+ and CS- pins. I tried the configuration shown on page8 before but the voltage from the resistor dividers are higher than 4V. Since the voltage on CS pins must not exceed 4V as recommended, I will try this again with around 2V from the dividers and check the response. I hope I will get a better result this time. Referring to page8 circuit, can you please enlighten me about the following: 1. What is the purpose of the NPN BJT connected to ADJ pin5? 2. How will the trace +SENSE connect to the power module? In my project's case, the 24V power stage (full-bridge LLC) being controlled by UCC25600. 3. Is there a load share controller more suitable for high voltage application available in your portfolio of products that is similar in pin configuration? Thanks and regards, Chester" + } ], + "tags" : [ "/support/power-management/f/196/tags/INA139", "/support/power-management/f/196/tags/TL431", "/support/power-management/f/196/tags/UCC29002" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900419.json b/data/json/DLP/900419.json new file mode 100644 index 0000000000000000000000000000000000000000..e630709f7d43e352409db0b1d3b430b4a57afde8 --- /dev/null +++ b/data/json/DLP/900419.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900419", + "reporterName" : "Kenny xiong", + "rankPoints" : "10", + "resolutionStatus" : "", + "ticketName" : "What materials can be used to make the temperature sensor housing?", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 12", + "queryText" : "I have been studying temperature sensors recently, and I want to know which materials the temperature sensor housing can be made of. What is the best temperature sensor housing? I originally contacted a company that made sensor housings elsewhere, called Suzhou Santian Precision Mould Manufacturing Co., Ltd. They told me that the plastic housing is the best among the temperature sensor housings. I am not very convinced, and I want to find more professional staff to help me answer. Does anyone know anything about the temperature sensor housing?", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3328791", + "userName" : "Josh Wyatt", + "rankPoints" : "61360", + "rankName" : "Guru", + "date" : "Apr 27, 2020 1:35 PM", + "userId" : "614", + "content" : "Kenny - Would you please clarify exactly what you mean by housing? Do you mean the packaging or the IC (part) or the enclosure of a finished product?" + } ], + "tags" : [ "/support/sensors/f/1023/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2bplease%2bhelp" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900420.json b/data/json/DLP/900420.json new file mode 100644 index 0000000000000000000000000000000000000000..ad2748edd327ac6c5bad113f16e45e86d20b2aca --- /dev/null +++ b/data/json/DLP/900420.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900420", + "reporterName" : "raghu M K", + "rankPoints" : "10", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "OPT3001: We are looking for ip65 outdoor LuX level transmitter/sensor..", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 7", + "queryText" : "Part Number: OPT3001 HI , Could you please suggest us the END USER for Complete Sensor model based on Texas controller OPT3001… We would like buy the complete sensor Unit .. Please share the contacts who manufactures or at least same IC would purchasing fromcompany , Such that it would help us to contact .", + "partNumber" : " OPT3001", + "allResponseList" : [ { + "contentId" : "3328986", + "userName" : "Alex Bhandari-Young", + "rankPoints" : "15670", + "rankName" : "Genius", + "date" : "Apr 27, 2020 3:17 PM", + "userId" : "4691324", + "content" : "Hi, I do not have any end user enclosures for sale meeting ip65 to recommend here. Best, Alex" + } ], + "tags" : [ "/support/sensors/f/1023/tags/OPT3001" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900426.json b/data/json/DLP/900426.json new file mode 100644 index 0000000000000000000000000000000000000000..ad310b85f2f02fd21a4ef8ee1f61e6a206c7141a --- /dev/null +++ b/data/json/DLP/900426.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900426", + "reporterName" : "KenF", + "rankPoints" : "1800", + "resolutionStatus" : "Resolved", + "ticketName" : "AWR1843: BIST time", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 14", + "queryText" : "Part Number: AWR1843 Hi Experts, How long does it take to complete boot time BIST on AWR1843? Best regards, Ken", + "partNumber" : " AWR1843", + "allResponseList" : [ { + "contentId" : "3328555", + "userName" : "Jitendra Gupta", + "rankPoints" : "33995", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 9:41 AM", + "userId" : "1717369", + "content" : "Hello Ken, Many of BIST test are done during the boot up time. And bootup time can be read from BSS using rlGetRfBootupStatus API. All the BIST test which it does will be within the bootup time received in above API response. Regards, Jitendra" + }, { + "contentId" : "3328736", + "userName" : "Raghunandan Kamath", + "rankPoints" : "20850", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 1:03 PM", + "userId" : "3451481", + "content" : "Ken, Boottime for BSS is ~10ms Boot time for MSS is dependent on: SFLASH based boot/SPI based boot Secure vs non-secure device Application Image size etc.. The boot time of ~100ms for a AWR1843 device boot . BR, Raghu" + } ], + "tags" : [ "/support/sensors/f/1023/tags/AWR1843", "/support/sensors/f/1023/tags/awr20_5F00_p1_5F00_swa20_5F00_sdk" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900430.json b/data/json/DLP/900430.json new file mode 100644 index 0000000000000000000000000000000000000000..ee2269a8d60211a03db1cc06498e842de8b48eb9 --- /dev/null +++ b/data/json/DLP/900430.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900430", + "reporterName" : "Ryan Delfino", + "rankPoints" : "30", + "resolutionStatus" : "", + "ticketName" : "LM3492: Use this chip as Buck (Step-down)", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 10", + "queryText" : "Part Number: LM3492 Hi, I want to use LED driver LM3492HC two drive to LED strings in my design. The spec says that it is a boost, but I would like to use it as a step down (buck) Example: 48V input with 35V output driving 200mA. I asked Customer Support about this but they suggested to post my query in this forum instead. Looking forward for some advice. Thanks. Regards, Ryan", + "partNumber" : " LM3492", + "allResponseList" : [ { + "contentId" : "3328700", + "userName" : "Irwin Nederbragt", + "rankPoints" : "20765", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 12:42 PM", + "userId" : "1880111", + "content" : "Hello Ryan, This is a boost with an internal MOSFET pulling to ground. There is no easy way to use this as a buck. Are you driving two LED strings? If so what are the operating conditions for your output? What are you planning on using this for? Best Regards," + }, { + "contentId" : "3328866", + "userName" : "Ryan Delfino", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 2:13 PM", + "userId" : "1868658", + "content" : "Hi Irwin, Thanks for your feedback, I appreciate it. Yes, I plan to drive two LED strings. Each string contains 28 LEDs with each string voltage equal 36V. We plan to use this in light therapy application Regards, Ryan" + }, { + "contentId" : "3329278", + "userName" : "Irwin Nederbragt", + "rankPoints" : "20765", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 5:48 PM", + "userId" : "1880111", + "content" : "Hello Ryan, You could look at using two TPS92515AHV LED drivers. Best Regards," + } ], + "tags" : [ "/support/power-management/f/196/tags/LM3492HC", "/support/power-management/f/196/tags/lm3492" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900434.json b/data/json/DLP/900434.json new file mode 100644 index 0000000000000000000000000000000000000000..e2a31d96978cfc7be811c6b5de95958682d67746 --- /dev/null +++ b/data/json/DLP/900434.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900434", + "reporterName" : "Austin Huang", + "rankPoints" : "400", + "resolutionStatus" : "", + "ticketName" : "IWR1642BOOST: High Accuracy Lab calibration question in IWR1642", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 18", + "queryText" : "Part Number: IWR1642BOOST Hi About High Accuracy sample in IWR1642. I am confused about calibration the offset issue. there are few link. but those didn't have detail information and doc about calibration. /support/sensors/f/1023/t/699928 /support/sensors/f/1023/t/737693 and below link mentioned \"the Fluid Level Transmitter which has this correction applied.\" /support/sensors/f/1023/t/792177?AWR1642BOOST-High-Accururacy-Range-Measurement-lab-example I tested the same FW and same cfg file in mmwave_industrial_toolbox_4_1_0 with Fluid Level Transmitter Visualizer 1.0 and High_Accuracy_Visualizer 1.2.0. the result 1575 mm is accuracy with real distance. Please share how to do calibration based on High Accuracy sample. Is any configuration setting to improving accuracy?? Austin", + "partNumber" : " IWR1642BOOST", + "allResponseList" : [ { + "contentId" : "3329597", + "userName" : "Akash Gondalia", + "rankPoints" : "39385", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 10:53 PM", + "userId" : "4768107", + "content" : "Hi Austin, I believe the other visualizer might have had some offset applied as an earlier version of the demo had a constant offset. I don't believe that is the case any more though. Would you be able to discuss your results? Regards, AG" + }, { + "contentId" : "3329830", + "userName" : "Austin Huang", + "rankPoints" : "400", + "rankName" : "Intellectual", + "date" : "Apr 28, 2020 3:28 AM", + "userId" : "3505488", + "content" : "Hi AG: According my testing result. there is about 8cm offset with real distance. You mentioned there is constant offset in visualizer(High Accuracy and Fluid Level Transmitter Visualizer). Could you point out where is it? I just confused. In mass production and with High Accuracy application. 1. Should we calibration for each mmWave device?? 2.if we need to calibration for each mmWave device. how to do that? and which parameter need to save and where can save the calibration data?? 3.if we don't need to do calibration. The offset is constant value under same manufacture/SMT condition?? 4. if we don't need to calibrate for mmWave device. if possible make parameter to make result same as or close real distance. Austin" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR1642BOOST", "/support/sensors/f/1023/tags/IWR1642", "/support/sensors/f/1023/tags/_2300_iwr1642", "/support/sensors/f/1023/tags/_2300_High%2bAccuracy" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900439.json b/data/json/DLP/900439.json new file mode 100644 index 0000000000000000000000000000000000000000..bf416ddd969c9cdab3d20e65149d134e2aace734 --- /dev/null +++ b/data/json/DLP/900439.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900439", + "reporterName" : "Yumiko hayashi", + "rankPoints" : "150", + "resolutionStatus" : "Resolved", + "ticketName" : "DRV5032: Product recommended", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 16", + "queryText" : "Part Number: DRV5032 Hi sir, Can you give me some Suggestion on product selection? Requirement: Hall sensor switch Hall sensor PCB system which have 8*8 hall sensor matrix Pieces should be detected only at particular height Output signal: Digital pulse Height of detection : within 6mm from the surface Power: 3.3~5v Neodymium magnet detection : N42 6mm*1.5mm cylindrical size thank u, Regards,", + "partNumber" : " DRV5032", + "allResponseList" : [ { + "contentId" : "3329057", + "userName" : "Scott Bryson", + "rankPoints" : "505", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 3:48 PM", + "userId" : "1253127", + "content" : "Hayashi-San, Could you clarify which length is the diameter of the magnet? The two geometries will behave differently. I assume there is an existing system and placement of the sensor cannot be adjusted much? There is a calculator tool available on each of the DRV5032, DRV5023, or DRV5021 landing pages that can help with this sort of activity. It allows the user to enter magnet dimensions and it will report the distances to trigger BOP and BRP for the various sensitivities. DRV5032 DRV5021 DRV5023 In the above cases, the calculator shows the maximum BOP points for the magnet settings provided. The closest device to the specific distance provided would be DRV5021A3. In all of the cases above this value is based on the datasheet maximum value for BOP to ensure all device would trip by the advertised distance." + } ], + "tags" : [ "/support/sensors/f/1023/tags/DRV5032" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900457.json b/data/json/DLP/900457.json new file mode 100644 index 0000000000000000000000000000000000000000..72c3f248879e8243b23fa34c03cca9c9011c7d93 --- /dev/null +++ b/data/json/DLP/900457.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900457", + "reporterName" : "Hector Ta", + "rankPoints" : "670", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "IWR6843: HVAC GUI error - visualizer in 4.2.1 toolbox", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 19", + "queryText" : "Part Number: IWR6843 I can use GUI at HVAC mode normally by installing the visualizer incompany toolbox, but when I generate an exe file from gui_main.py to run GUI, it always closed immediately after 1 frame of data. This problem happened with updated GUI python program. When I used the old version of GUI, I generated my own exe file without any problem. Due to the lack of HVAC mode in the old GUI version, so I must use an updated GUI. But this updated GUI python program makes me can't run GUI by my own exe file anymore. Please tell me the root cause and solution.", + "partNumber" : " IWR6843", + "allResponseList" : [ { + "contentId" : "3328974", + "userName" : "Justin Curewitz", + "rankPoints" : "23615", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 3:09 PM", + "userId" : "5118664", + "content" : "Hi Hector, With the older gui, you can use IFDM or Indoor False Detection Mitigation with the HVAC demo. Regards, Justin" + }, { + "contentId" : "3330000", + "userName" : "Hector Ta", + "rankPoints" : "670", + "rankName" : "Intellectual", + "date" : "Apr 28, 2020 6:56 AM", + "userId" : "6292133", + "content" : "Hi Justin, 1. I ran new GUI after modified it to re-open GUI without having to reset device. But now, when I run HVAC mode, GUI has green light flashing. I tried both baud rate at 921600 and 921600*2 but i still happened. What's the cause? 2. So I only need to modify GUI python code Indoor False Detection Mitigation to a new name as HVAC, will it work normally without green light flashing as in the video below? Please help me solve the green light flashing issue with updated 4.2.1 toolbox GUI or GUI old version for HVAC, and point out the part that caused this issue. Below is the video and my GUI python code after modified gui_main2.zip https://www.youtube.com/watch?v=z1xVYQ8kgMw&feature=youtu.be" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR6843", "/support/sensors/f/1023/tags/_2300_GUI" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900464.json b/data/json/DLP/900464.json new file mode 100644 index 0000000000000000000000000000000000000000..a456cb8f2852dea3998e0e30a382e5bc329d04ef --- /dev/null +++ b/data/json/DLP/900464.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900464", + "reporterName" : "Andy_Lin", + "rankPoints" : "1670", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS2546: does this part have reverse current blocking function?", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 9", + "queryText" : "Part Number: TPS2546 Hi Team, quick check , as title , does this part have reverse current blocking function? my customer is asking this question , and per my check on d/s this part didn't have the function above, just wanted to have a quick sync on this to confirm if my understanding is correct, thanks!", + "partNumber" : " TPS2546", + "allResponseList" : [ { + "contentId" : "3328750", + "userName" : "Adam Mc Gaffin", + "rankPoints" : "13080", + "rankName" : "Genius", + "date" : "Apr 27, 2020 1:07 PM", + "userId" : "4996939", + "content" : "Hi Andy, No the TPS2546 does not offer any RCP functionality. However, it may not necessarily be needed as the application a TPS2546 is used in should not have another voltage presented on VBUS. If you do want protection, you can use a device like the TPD1S514-1 connected to the TPS2546 which will protect against over voltage events on VBUS." + }, { + "contentId" : "3328790", + "userName" : "Andy_Lin", + "rankPoints" : "1670", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 1:35 PM", + "userId" : "5344588", + "content" : "Hi Adam, Thanks for the check and reply. I would like check one more function on TPS2546 , the EN(enable) function customer wanted to know, the enable pin on TPS2546 will turn on/off the power and signal path together , is that correct? I would say this is correct , and customer can see from the d/s pin define(figure below), customer have this doubt is due to the block diagram(d/s 8.2) only show the enable of power path but not signal path, I assume the block diagram just only the simplified schemaitc, not the detail internal circuit." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS2546" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900473.json b/data/json/DLP/900473.json new file mode 100644 index 0000000000000000000000000000000000000000..930eee70c5fba3d9f501384163919bfbeda0a670 --- /dev/null +++ b/data/json/DLP/900473.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900473", + "reporterName" : "PAN-M", + "rankPoints" : "7410", + "resolutionStatus" : "", + "ticketName" : "BQ25882: Out of range when termination current at 50mA setting", + "rankName" : "Mastermind", + "replies" : " 2", + "views" : " 25", + "queryText" : "Part Number: BQ25882 Hi, It is written in the datasheet that an error when I set a termination current to 50mA is ±40%. Therefore, the upper side is 70mA. I measured termination current in two following environment. 1) BQ25882EVM-001 + 2cell Battery + Ammeter (BAT+ <-Meter-> Battery) 2) BQ25882EVM-001 + 2cell Battery + Voltage Meter (both end of R6(10mohm)) Even if several times of results measured termination current, it exceed 80mA. Is this problem of device or EVM or setting? In any event, please teach me the reason because I want to reappear. Best Regards, PAN-M", + "partNumber" : " BQ25882", + "allResponseList" : [ { + "contentId" : "3329794", + "userName" : "Michael Emanuel35", + "rankPoints" : "2055", + "rankName" : "Intellectual", + "date" : "Apr 28, 2020 2:43 AM", + "userId" : "4996893", + "content" : "Hi PAN-M, We have verified the termination current is within the specification under the given conditions before. The possible discrepancy could be related to the setup or measurement accuracy. For setup 1, we don’t recommend putting a meter within the loop as it changes the loop characteristic. For setup 2, minimizing the connection of the impedance and making sure the calibrated meter has the expected capability (10 µV represents 1 mA) are important. Thanks, Mike Emanuel" + }, { + "contentId" : "3329876", + "userName" : "PAN-M", + "rankPoints" : "7410", + "rankName" : "Mastermind", + "date" : "Apr 28, 2020 4:35 AM", + "userId" : "550882", + "content" : "Mike-san Thank you for support. In the case of 2, the measuring instrument is connected to resistance in parallel. A resistance level must be high to misread a current value highly. How should this point intend? bq25882_E2E.pdf Best Regards, PAN-M" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25882", "/support/power-management/f/196/tags/BQ25882EVM_2D00_001" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900476.json b/data/json/DLP/900476.json new file mode 100644 index 0000000000000000000000000000000000000000..5e8f781860dc0aeed24c30fbd1be653b4bc74bdc --- /dev/null +++ b/data/json/DLP/900476.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "900476", + "reporterName" : "Guillermo Corrales", + "rankPoints" : "175", + "resolutionStatus" : "", + "ticketName" : "TPS43351-Q1: Behaviour doubts", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 14", + "queryText" : "Part Number: TPS43351-Q1 Hi All, I'm designing the power supply of a Jacinto6-based board and I'm using the TPS43331-Q1 as a first-stage regulator to provide 3V3 and 5V0 to my circuit. Unfortunately, after reviewing the datasheet I still have some doubts I hope you can help me with: ENA/ENB Regarding its VIH(th )and VIL(th).... which one of the following assumptions are correct? Assumption 1 Being ENA/ENB HIGH, It will remains HIGH until the voltage decreases to VIL,th = 0.7V Being ENA/ENB LOW, It will remains LOW until the voltage increases to VIH,th = 1.7V Assumption 2 Being ENA/ENB HIGH, It will remains HIGH until the voltage decreases to VIH,th = 1.7V Being ENA/ENB LOW, It will remains LOW until the voltage increases to VIL,th = 0.7V If neither of the above assumptions are correct, then How is the exact behaviour of these thresholds? Regarding its relation with PGA/PGB... What happens when a ENABLE pin is asserted LOW? Is the regulated output immediately turned OFF or is there any delay present? Is the Power Good output immediately turned OFF or is it affected by the tdelay delay? VIN(Min) and VIN(Threshold) According to the datasheet, the OPERATING voltage range (after initial start-up) is 4V - 40V and the UNDERVOLTAGE limit is 3.6V. With this information what I understand is: The buck regulators will work in the range 4V - 40V. Below 4V it will stop regulating (bucks will shutdown -> PGA/B asserted low INMEDIATELY, no voltage in the regulated outputs) The rest of the internal functions of the chip will work up to 3.6V However, In the \"7.3.5 UVLO and Overvoltage protection\" section it specifies the following: \"Once it has started up, the device OPERATES down to a VIN voltage of 3.6 V; below this voltage level, the undervoltage lockout disables the device.\" With this explanation what I understand is: The buck regulators will work in the range 3.6V - 40V instead of the defined 4V - 40V because it says the device will OPERATE down to 3.6V And in the \"5 Pin Configuration and Functions\" section it specifies the following related with PGA/PGB: \"An internal power-good comparator monitors the voltage at the feedback pin and pulls this output low when the output voltage falls below 93% of the set value or if either VIN or VBAT drops below its respective undervoltage threshold\" With this explanation what I understand is The buck regulators will work in the range 3.6V - 40V instead of the defined 4V - 40V because it says its PG outputs will be asserted low when the UVLO is reached instead of VIN,min. So in the end, Which voltage range is the real one? And if neither of my assumptions are correct, then Which ones are the exact differences between VIN,min and VIN,th regarding the behavior of the device? PGA/PGB Regarding its tdelay... Does this delay only affect the PGA/PGB outputs? What is the meaning of the following explanation given in the \"7.3.1.8 Power-Good Outputs and Filter Delays\" section? \"Use of this delay can pauses the delay of the reset\" Which delay is that \"delay of the reset\"? Which functions are affected by this delay? Operating point doubts Finally, In order to fully understand the behaviour of the device in my design, I have some doubts related with some specific operating points.Let's assume the device is working under an initial VIN = 24V and then the power supply is abruptly removed from the circuit so the VIN voltage starts decreasing quickly. What would happen with... 3V3 buck regulated output 3V3 buck PG 5V buck regulated output 5V buck PG ... in the following situations? VIN = 5.5V VIN = 5V VIN = 4.6V VIN = 4V VIN = 3.8V VIN = 3.6V VIN = 3.3V VIN = 2V NOTE: The TPS43351-Q1 schema used is the same that is present in J6-plus EVM Thank you very much in advance for your valuable help!", + "partNumber" : " TPS43351-Q1", + "allResponseList" : [ { + "contentId" : "3328688", + "userName" : "Krishnamurthy Hegde", + "rankPoints" : "6190", + "rankName" : "Expert", + "date" : "Apr 27, 2020 12:30 PM", + "userId" : "1929317", + "content" : "Hi, I have forwarded your request to the responsible Applications Engineer in US time zone and we will get back to you in a day or two. Regards, Murthy." + }, { + "contentId" : "3328868", + "userName" : "AClemotte", + "rankPoints" : "770", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 2:14 PM", + "userId" : "5773310", + "content" : "This question is related to /.../3156870" + }, { + "contentId" : "3329516", + "userName" : "Mahmoud Harmouch", + "rankPoints" : "17810", + "rankName" : "Genius", + "date" : "Apr 27, 2020 9:11 PM", + "userId" : "9125", + "content" : "Hello and thanks for reaching out! ENA/ENB 1- ENA and ENB logic levels are as defined in the spec. EN > 1.7V threshold means the BUCK is guaranteed to turn on. EN < 0.7V threshold means the BUCK is guaranteed to turn off. That means the signal, driving ENA and ENB, should meet VOL < 0.7V and VOH > 1.7V 2- Regarding its relation with PGA/PGB. When ENA/B is asserted low, the BUCKA/B turns off immediately with no delay. The delay still valid for PGA/B. VIN(Min) and VIN(Threshold) The 4V to 40V range spec is not defined with precision. The UVLO falling threshold is 3.6V typical. That means the BUCK circuit is functional down to 3.6V on VIN. The BUCK output depends on the external components and load conditions. The PG is responding to output voltage set as long as the circuit is functioning (VIN > UVLO). Once VIN < UVLO, PG is asserted low. PGA/PGB The PG signal is the RESET. There is internally programmed delay in the order of few micro-seconds. The PG signal (RESET) is asserted low if BUCK output is out of regulation or VIN is below UVLO. I believe this sentence \"Use of this delay can pauses the delay of the reset\" means adding external capacitor will override the internally programmed delay. Operating point doubts When the device is operation in the low supply voltage range, the BUCK output can be out of regulation but the level depends on the external circuitry and the load conditions. I hope this answers you questions and please let me know for further support. Regards, Mahmoud" + }, { + "contentId" : "3330023", + "userName" : "Guillermo Corrales", + "rankPoints" : "175", + "rankName" : "Prodigy", + "date" : "Apr 28, 2020 7:23 AM", + "userId" : "6211156", + "content" : "Dear Mahmoud, Thank you very much for your detailed answer! So regarding the ENA/ENB doubt, just to confirm: in the range 0.7V < ENA/ENB < 1.7Vcompany does NOT guarantee the behaviour of the logic. There is no hysteresis, right? Best regards," + } ], + "tags" : [ "/support/power-management/f/196/tags/powergood", "/support/power-management/f/196/tags/VIN_2800_min_2900_", "/support/power-management/f/196/tags/VIN_2800_threshold_2900_", "/support/power-management/f/196/tags/delay", "/support/power-management/f/196/tags/enable", "/support/power-management/f/196/tags/TPS43331_2D00_Q1", "/support/power-management/f/196/tags/VIN", "/support/power-management/f/196/tags/PGA_2F00_B", "/support/power-management/f/196/tags/ENA_2F00_B", "/support/power-management/f/196/tags/TPS43351_2D00_Q1", "/support/power-management/f/196/tags/threshold" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900483.json b/data/json/DLP/900483.json new file mode 100644 index 0000000000000000000000000000000000000000..eb0850d8df3801ad3c406b6f705820479b37aa0b --- /dev/null +++ b/data/json/DLP/900483.json @@ -0,0 +1,63 @@ +{ + "ticketNumber" : "900483", + "reporterName" : "Chun Youngsu", + "rankPoints" : "2485", + "resolutionStatus" : "", + "ticketName" : "TPS61236P: TPS61236P Output Voltage Issue.", + "rankName" : "Expert", + "replies" : " 6", + "views" : " 21", + "queryText" : "Part Number: TPS61236P Dearcompany Team, If the difference between the input voltage and the output voltage of the TPS61236P is designed below 0.5V, can you know what kind of damage it does to the IC? VIN: 4.2V Vout: 4.5V 1A In the above design, short defects of SW pin and VOUT pin occur about 5%. (Chip Only Impedance SW to VOUT pin: about 22ohm) I want to check if the cause of the defect is due to the voltage difference between Vin and Vout. Best Regards, Thanks.", + "partNumber" : " TPS61236P", + "allResponseList" : [ { + "contentId" : "3329726", + "userName" : "Zack Liu", + "rankPoints" : "12485", + "rankName" : "Genius", + "date" : "Apr 28, 2020 1:40 AM", + "userId" : "4961181", + "content" : "Hi Youngsu, Per datasheet part 7.3. The maximum input voltage should be 0.6V lower than the output voltage. You may choose another boost device which can support Vout-Vin<0.5V. For example, TPS61022 is a good choice." + }, { + "contentId" : "3329732", + "userName" : "Chun Youngsu", + "rankPoints" : "2485", + "rankName" : "Expert", + "date" : "Apr 28, 2020 1:45 AM", + "userId" : "4692027", + "content" : "Hi Liu, We confirmed that the design is not satisfactory. I want to know what can happen if the voltage difference between Vin and Vout is less than 0.6V. Thanks." + }, { + "contentId" : "3329744", + "userName" : "Zack Liu", + "rankPoints" : "12485", + "rankName" : "Genius", + "date" : "Apr 28, 2020 1:57 AM", + "userId" : "4961181", + "content" : "Hi Youngsu, During CV operation, the maximum VIN should be 0.6-V below VOUT to keep the output voltage well regulated. The TPS6123x may enter into pass-through operation prematurely when VIN is close to but still below VOUT, and exists when VIN is below the threshold with a hysteresis. When in pass-through operation, the boost converter stops switching and keeps the rectifying switch on, so the input voltage can pass through the external inductor and internal rectifying switch to the output. The output current capability becomes lower and is limited by the precharge current limit ILIM_pre of the rectifying switch. More than 0.4-V under-voltage of VOUT may occur due to the premature pass-through operation and the hysteresis of existing. If the under-voltage is not acceptable, the maximum VIN should be limited to 0.6-V below VOUT , which gives enough margin to avoid the pass-through operation. To find the root cause of short defects of SW pin and Vout pin, please share the schematic and layout. Also share the key waveforms if you have," + }, { + "contentId" : "3329783", + "userName" : "Chun Youngsu", + "rankPoints" : "2485", + "rankName" : "Expert", + "date" : "Apr 28, 2020 2:36 AM", + "userId" : "4692027", + "content" : "Hi Liu, Share the layout." + }, { + "contentId" : "3329907", + "userName" : "Zack Liu", + "rankPoints" : "12485", + "rankName" : "Genius", + "date" : "Apr 28, 2020 5:15 AM", + "userId" : "4961181", + "content" : "Hi Youngsu, The layout is not good. 1) The output capacitors placement is not recommended.company suggests place the output capacitors close to the IC. The capacitors are directly connected to Vout pin and GND pin so that the PCB parasitic inductance is the minimum. With the below placement, the big parasitic inductance will cause high spikes at SW nodes and even cause damge. 2) The FB gnd should be the AGND. Why do you say TPS61022 is not satifactory?" + }, { + "contentId" : "3330039", + "userName" : "Chun Youngsu", + "rankPoints" : "2485", + "rankName" : "Expert", + "date" : "Apr 28, 2020 7:40 AM", + "userId" : "4692027", + "content" : "Hi Liu, Thank you for your confirmation. MP starts and cannot be changed. I am considering a way to increase the output voltage. Best Regards, Thanks." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS61236P" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900487.json b/data/json/DLP/900487.json new file mode 100644 index 0000000000000000000000000000000000000000..8e4521e646f57cc652bb821b0a8ed88609350263 --- /dev/null +++ b/data/json/DLP/900487.json @@ -0,0 +1,15 @@ +{ + "ticketNumber" : "900487", + "reporterName" : "Aanund Storhaug", + "rankPoints" : "10", + "resolutionStatus" : "", + "ticketName" : "DCA1000EVM: Failing, reading output file adc_data_0.bin", + "rankName" : "Prodigy", + "replies" : " 0", + "views" : " 5", + "queryText" : "Part Number: DCA1000EVM Hi, We have an IWR6843 radar card we run together with the raw data capture device DCA1000EVM. We run it through mmWaveStudio version 2.1.0. To read the data after it has been through the reorder zero fill function in the post process functionality in mmWaveStudio, we use the Matlab function described in the document, Mmwave Radar Device ADC Raw Data Capture section 9.2. Adjusting the parameters according to our configuration. This works fine as long as data capturing should stop after a certain number of frames is selected in the mmWaveStudio. Resulting in a adc_data.bin file less than or equal to max size. If the parameter No. of Frames is set to 0 (means continuously data capture), the same reading functionality fails. The data file are divided in files named adc_data_0.bin, adc_data_1.bin and so on. Size of one file shown in Windows explorer is 1 048 576 KB . The file size lacks 32 complex double values to match a complete set of chirps/frames. The fileSize = size(adcData, 1); returns the size 536870880. This does not match an integer when numChirps is defined. Setting No. of Frames to 512 file size becomes 536870912 which is 32 complex values larger than when automatic stop of file is set, the reading functions works fine. What is the problem? Is the data files cut off in the middle of a chirp so I have to append more data files and make a restructuring of the data my selves? Regards Aanund Storhaug", + "partNumber" : " DCA1000EVM", + "allResponseList" : [ ], + "tags" : [ "/support/sensors/f/1023/tags/_2300_%2b%2b%2bDCA1000", "/support/sensors/f/1023/tags/IWR6843", "/support/sensors/f/1023/tags/DCA1000EVM", "/support/sensors/f/1023/tags/_2300_%2b%2b%2bEVM", "/support/sensors/f/1023/tags/_2300_%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2b%2bIWR6843" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900489.json b/data/json/DLP/900489.json new file mode 100644 index 0000000000000000000000000000000000000000..5e44ae1259d3c4f729c651ebb70b4934a04fb2b0 --- /dev/null +++ b/data/json/DLP/900489.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900489", + "reporterName" : "SHH", + "rankPoints" : "23800", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "Asking for the HDC2021 & TMP75AIDGKR reliability test report", + "rankName" : "Mastermind", + "replies" : " 3", + "views" : " 16", + "queryText" : "Hi Team, Customer is designing HDC2021 & TMP75AIDGKR. Would you please let me know where can download the HDC2021 & TMP75AIDGKR reliability test report? BR, SHH", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3328730", + "userName" : "David Vaseliou", + "rankPoints" : "4830", + "rankName" : "Expert", + "date" : "Apr 27, 2020 12:59 PM", + "userId" : "4910861", + "content" : "Hi SHH, Quality and reliability information can be found here: /support-quality/quality-reliability.html HDC2021 is still \"in preview\" and may not have all data available on . Thanks, David" + }, { + "contentId" : "3328805", + "userName" : "SHH", + "rankPoints" : "23800", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 1:41 PM", + "userId" : "1862964", + "content" : "Hi David, I went into the site you provided. I did not see search function to search TMP75 and HDC2021. Can you help? BR, SHH" + }, { + "contentId" : "3328821", + "userName" : "David Vaseliou", + "rankPoints" : "4830", + "rankName" : "Expert", + "date" : "Apr 27, 2020 1:48 PM", + "userId" : "4910861", + "content" : "SHH, The panel on the left hand has different links for different qualification and reliability information. Qualification Report: /qualificationsummary/qualsumm/home?actionId=2800 Material Content Report: /materialcontent/home Moisture Sensitivity Level: /packaging/docs/mslsearch.tsp Thanks, David" + } ], + "tags" : [ "/support/sensors/f/1023/tags/HDC2021" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900492.json b/data/json/DLP/900492.json new file mode 100644 index 0000000000000000000000000000000000000000..1da68d219e279e09e75f95c50928b528f8c7d09d --- /dev/null +++ b/data/json/DLP/900492.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900492", + "reporterName" : "Abyl Ikhsanov", + "rankPoints" : "90", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "IWR1443BOOST: Where can I find a timmwave_ros_pkg?", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 22", + "queryText" : "Part Number: IWR1443BOOST Hi, I went to thecompany developer hub and went to the folder containing ROS PointCloud visualizer but for some reason there is no source code but only the documentation. Where can I find that package?", + "partNumber" : " IWR1443BOOST", + "allResponseList" : [ { + "contentId" : "3329340", + "userName" : "Charles Oladimeji", + "rankPoints" : "26350", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 6:41 PM", + "userId" : "4461477", + "content" : "Hi, Please see TIREX for ROS examples BR, Charles O" + }, { + "contentId" : "3329354", + "userName" : "Abyl Ikhsanov", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 6:53 PM", + "userId" : "5946676", + "content" : "But again, there are no source files." + }, { + "contentId" : "3329357", + "userName" : "Charles Oladimeji", + "rankPoints" : "26350", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 6:57 PM", + "userId" : "4461477", + "content" : "Hi Please download and install the toolbox. the source is included in the robotics folder. BR, Charles O" + } ], + "tags" : [ "/support/sensors/f/1023/tags/IWR1443BOOST", "/support/sensors/f/1023/tags/ROS", "/support/sensors/f/1023/tags/_2300_%2b%2b%2b%2bAWR1443BOOST", "/support/sensors/f/1023/tags/_2300_%2b%2b%2b%2b%2bIWR6843" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900493.json b/data/json/DLP/900493.json new file mode 100644 index 0000000000000000000000000000000000000000..9bfad191d5ece3ae76276da19502c60d423e7d0d --- /dev/null +++ b/data/json/DLP/900493.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900493", + "reporterName" : "Jejomar Iidefonso", + "rankPoints" : "1695", + "resolutionStatus" : "", + "ticketName" : "UCC2813-4: Thresholds at 70V VCC", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 11", + "queryText" : "Part Number: UCC2813-4 Hello Team, Good day! Need your inputs on this. Our customer wants to operate the UCC2813-4 at 70V and 60V VCC as the turn-on and off threshold respectively. Is it possible to do this through a voltage divider configuration at the supply stage? This is also while ensuring the given threshold value range and ICC at 30mA through the current limiting resistor. If so, are there any other conditions to be considered? Thanks in advance! Kind Regards, Jejomar", + "partNumber" : " UCC2813-4", + "allResponseList" : [ { + "contentId" : "3330109", + "userName" : "Teng Feng", + "rankPoints" : "9390", + "rankName" : "Genius", + "date" : "Apr 28, 2020 9:06 AM", + "userId" : "5617595", + "content" : "Hi Jejomar, UCC2813-4 does't have input ON_OFF function. I think if you want to feature input ON_OFF with hysteresis, a hysteresis voltage comparator circuit should be required to added in the circuit to control the COMP. Regards, Teng" + }, { + "contentId" : "3330115", + "userName" : "Jejomar Iidefonso", + "rankPoints" : "1695", + "rankName" : "Intellectual", + "date" : "Apr 28, 2020 9:15 AM", + "userId" : "5925422", + "content" : "Hello Teng, Thanks for looking into this. What I meant was the UVLO threshold of the UCC2813-4. Our customer wants to utilize the threshold in a way that a 70V supply would turn on and 60V would turn the device off through UVLO. We're trying to look at a voltage divider in the supply stage to achieve the required thresholds on the input pin while maintaining the supply current through the current limiting resistor. Would this be applicable or do we have to consider other conditions? Kind Regards, Jejomar" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC2813_2D00_4" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900494.json b/data/json/DLP/900494.json new file mode 100644 index 0000000000000000000000000000000000000000..d29493fd6309ed37c9482a3cf78f1bdeedfbd586 --- /dev/null +++ b/data/json/DLP/900494.json @@ -0,0 +1,15 @@ +{ + "ticketNumber" : "900494", + "reporterName" : "user5241150", + "rankPoints" : "10", + "resolutionStatus" : "", + "ticketName" : "TPS561208EVM-896: High current consumption without connected load", + "rankName" : "Prodigy", + "replies" : " 0", + "views" : " 3", + "queryText" : "Part Number: TPS561208EVM-896 Hello, I measure the current consumption of the TPS56108EVM-896 without load (converter is active, 12V Input, 3,3V Output) and the current consumption is 20.8mA. Is that correct? The current consumption of the TPS562201EVM-715 is only 0.45mA.", + "partNumber" : " TPS561208EVM-896", + "allResponseList" : [ ], + "tags" : [ "/support/power-management/f/196/tags/TPS561208EVM_2D00_896", "/support/power-management/f/196/tags/TPS562201EVM_2D00_715" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900502.json b/data/json/DLP/900502.json new file mode 100644 index 0000000000000000000000000000000000000000..4469a7de0eaaa57c0189aa9b0fd14dce4c4444a9 --- /dev/null +++ b/data/json/DLP/900502.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900502", + "reporterName" : "Shunsuke Nagata", + "rankPoints" : "7080", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "CSD87381P: Q1 Control FET / Q2 Sync FET", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 5", + "queryText" : "Part Number: CSD87381P Hi, Could you please let me confirm about Control FET and Sync FET? Datasheet doesn't explain what they are. But I guess - Q1 Control FET -> High side FET - Q2 Sync FET -> Low side FET Is my understanding correct? Regards, Nagata.", + "partNumber" : " CSD87381P", + "allResponseList" : [ { + "contentId" : "3328746", + "userName" : "John Wallace1", + "rankPoints" : "9460", + "rankName" : "Genius", + "date" : "Apr 27, 2020 1:05 PM", + "userId" : "3502056", + "content" : "Hello Nagata san, Thanks for the inquiry. Your interpretation is correct. Q1 (control FET) is the high side FET and Q2 (sync FET) is the low side FET in a half bridge configuration optimized for synchronous buck converter." + } ], + "tags" : [ "/support/power-management/f/196/tags/CSD87381P" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900503.json b/data/json/DLP/900503.json new file mode 100644 index 0000000000000000000000000000000000000000..7446219ce4ae476a6deb20795b991512aef561b6 --- /dev/null +++ b/data/json/DLP/900503.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900503", + "reporterName" : "Alberto Riera", + "rankPoints" : "110", + "resolutionStatus" : "", + "ticketName" : "TPIC71004-Q1: I cannot configure Counter set of Registers (ZCNT and TOCNT)", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 12", + "queryText" : "Part Number: TPIC71004-Q1 HEllo, I'm trying to configure this IC following the DAta Sheet instructions: So at first I assert the TZ0 and IWD lines Then I Move the FSM to IM1 (STATUS register) Then I configure the DAC (Firing configuration) Then I try to set ZCNT and TO CNT registers When I read back all the set of TPIC registers I see that the STATUS and DAC are properly written to my desired values but the counters are all set to their default values: STATUS = 0x40 DAC = 0x10 ZCNT[0:3] = 0x0A TOCNT[0:3] = 0xBB Finally when I setup the Firing sequence I see the counters to go down, ZCNT arrives to zero, so my guess is that the READ works properly and the issue is that OI cannot write such registers. Am I missing some step in the configuration sequence? why the TPIC does not let me to change the default values?", + "partNumber" : " TPIC71004-Q1", + "allResponseList" : [ { + "contentId" : "3328960", + "userName" : "Costin Cazana", + "rankPoints" : "4080", + "rankName" : "Expert", + "date" : "Apr 27, 2020 3:00 PM", + "userId" : "18391", + "content" : "Hi, I have notified our expert regarding this topic. Please expect a response by 4/30/20. Regards, Costin" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPIC71004", "/support/power-management/f/196/tags/TPIC71004_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900505.json b/data/json/DLP/900505.json new file mode 100644 index 0000000000000000000000000000000000000000..745465d301ab41ec3e70079910294fce0fd67160 --- /dev/null +++ b/data/json/DLP/900505.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900505", + "reporterName" : "Tuan Le1", + "rankPoints" : "20", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS53915EVM-587: Non-matching between schematic and layout on the TPS53915EVM-587 board", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 16", + "queryText" : "Part Number: TPS53915EVM-587 Q1) I found that in the schematic is AGND (pin 22) connected to PGND via resistor R8 = 0R but in the top layer, I saw that pin 22 (AGND) connected directly to IC's Thermal Pad. So that I get confused about this connection. Which one is correct? Q2) Can R8 change be to ferrite bead? and Can you recommend the part number? I also attached the picture for more details. Thanks a lot Tuan Le", + "partNumber" : " TPS53915EVM-587", + "allResponseList" : [ { + "contentId" : "3329055", + "userName" : "Peter James Miller", + "rankPoints" : "19805", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 3:46 PM", + "userId" : "8518", + "content" : "Tuan Le1 Q1) I will check on why the schematic and the layers are out of SYNC. They Layout appears to be using a \"net-tie\" to directly connect the pin to the thermal pad without using a resistor. This is preferred over connecting the AGND pin to the thermal pad through a resistor. Q2) R8 (AGND to PGND) should not be a ferrite bead. The high impedance at high frequency between AGND and PGND could interfer with the IC's functionality as digital signals cross from the Analog Ground to Power Ground domains within the chip." + }, { + "contentId" : "3329961", + "userName" : "Tuan Le1", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 28, 2020 6:21 AM", + "userId" : "6135323", + "content" : "Dear Peter Thank you for your reply soon I have another question according to Q1. In my project I already used TPS53915 to convert from 12V to 1.8V/7A. But when I measured signals as power good, SM Bus and Address pins then I saw that they have some noise. After check layout in my board, I see it different with TPS53915EVM-587 at pin 22 connected directly to thermal pad. I asume that this is reason why my board have noise. If correct, could you explain this one? I will explain about layout in my board, I drew pin 22 (AGND) via from Top layer to Bottom after that connect to resistor R8 = 0R to PGND at bottom and via from bottom to Top layer to connect to IC's Thermal pad. I also attached picture for more details Thanks Tuan Le" + } ], + "tags" : [ "/support/power-management/f/196/tags/tps53915", "/support/power-management/f/196/tags/TPS53915EVM_2D00_587" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900510.json b/data/json/DLP/900510.json new file mode 100644 index 0000000000000000000000000000000000000000..4626acfac96bc8d05132bc17ae05444caddcc1f5 --- /dev/null +++ b/data/json/DLP/900510.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900510", + "reporterName" : "Yoshiki Ochi", + "rankPoints" : "1150", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "FDC2214-Q1: How can we decide sensing length?", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 16", + "queryText" : "Part Number: FDC2214-Q1 Hi team, I would like to use proximity sensor to detect human hand and measurement range is 4cm ~ 9cm. How can we decide sensing length? Is it related to how large sensor plate is? Also, could you tell me the difference and benefits between capacitive sensing method and inductive sensing method? Regards, Ochi", + "partNumber" : " FDC2214-Q1", + "allResponseList" : [ { + "contentId" : "3329059", + "userName" : "Kristin Jones93", + "rankPoints" : "15785", + "rankName" : "Genius", + "date" : "Apr 27, 2020 3:49 PM", + "userId" : "4996845", + "content" : "Hello Ochi, Yes, the sensing range is based on the area of the sensor plate. This application note gives guidelines about the sensing distance for various sensor plate sizes. If the target is metal, we almost always recommend using inductive sensing. This is because inductive sensing is immune to the effects of non-conductive targets, so there are fewer possible environmental disturbances. We recommend capacitive sensing if the target is unsuitable for inductive sensing (like a human hand). Both the FDC2x1y devices and the LDC devices use the resonant sensing approach that makes them immune to broadband noise. Best Regards," + }, { + "contentId" : "3329650", + "userName" : "Yoshiki Ochi", + "rankPoints" : "1150", + "rankName" : "Intellectual", + "date" : "Apr 28, 2020 12:01 AM", + "userId" : "5987528", + "content" : "Hi Jones, Thank you for your explanation. I understood I can use FDC devise for capasitive sensing. I wonder if is it possible to detect lower than 10cm with FDC device. Figure.3 in application note looks that the detection range is above 15cm. Could you tell me whether it is possible or not? If possible, how can we achieve that> Regards, Ochi" + } ], + "tags" : [ "/support/sensors/f/1023/tags/FDC2214_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900512.json b/data/json/DLP/900512.json new file mode 100644 index 0000000000000000000000000000000000000000..5deaa07d9678896aa02ea88c519950f559923da5 --- /dev/null +++ b/data/json/DLP/900512.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900512", + "reporterName" : "Gary Teng", + "rankPoints" : "2410", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS543B20: TPS543B20 transient performance issue", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 14", + "queryText" : "Part Number: TPS543B20 Hi all, My customer want to improve TPS543B20 transient performance to compete with IR3895 and they try to modify RAMP circuit as EVM. Would you please helping to provide calculation tool so customer can modify evm's setting to test? Thanks. VIN 12 V VOUT 5 V D 0.416667 IOUT 15 A FSW 500 KHZ Best regards, Gary Teng gary.teng@arrowasia.com", + "partNumber" : " TPS543B20", + "allResponseList" : [ { + "contentId" : "3328994", + "userName" : "Peter James Miller", + "rankPoints" : "19805", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 3:21 PM", + "userId" : "8518", + "content" : "Gary Teng The TPS543B20 ramp selection resistor table is on page 16 of the datasheet - /lit/ds/symlink/tps543b20.pdf#page=16 The larger Cramp, the smaller the internal ramp will be and the faster the transient response will be. Including a voltage feedforward capacitor (C22 in the above schematic) will impose more of the output voltage directly on the feedback pin, also increasing the transient response, this is especially effective for a 5V output that would have a large Vout to RSP divider ratio. Rramp = 187kOhms is the second highest Cramp value. Furthering increasing the loop response will require removing the Ramp resistor (R2) to select the largest Cramp capacitor, or reducing the inductor value to speed up the loop response." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS543B20" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900515.json b/data/json/DLP/900515.json new file mode 100644 index 0000000000000000000000000000000000000000..ecc6a99c3811199787c835f982092481117dd2f0 --- /dev/null +++ b/data/json/DLP/900515.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900515", + "reporterName" : "Yeh Ting Shao", + "rankPoints" : "20", + "resolutionStatus" : "", + "ticketName" : "AWR1843BOOST: How to communication the AWR1843BOOST Board without USB cable", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 14", + "queryText" : "Part Number: AWR1843BOOST Hi everyone, I'm using [Automotive Toolbox / Labs / Obstacle Detection] for practice, to learn how to use AWR1843BOOST Board. And I'm wondering \"how to use PC to control AWR1843BOOST without Micro USB Cable?\" (maybe Bluetooth or else) Please tell me how should I do. Thanks a lot!", + "partNumber" : " AWR1843BOOST", + "allResponseList" : [ { + "contentId" : "3328989", + "userName" : "Kyle Cousino", + "rankPoints" : "19220", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 3:18 PM", + "userId" : "4381542", + "content" : "Yeh, The communication method between the AWR1843BOOST and a PC is UART over USB. Bluetooth is not a supported interface/peripheral on AWR1843BOOST. You would need to connect to the AWR1843BOOST to an external Bluetooth device. Regards, Kyle" + }, { + "contentId" : "3329711", + "userName" : "Yeh Ting Shao", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 28, 2020 1:21 AM", + "userId" : "6310806", + "content" : "Kyle, Is there any suggestion that what external Bluetooth device should I use? I'm looking for a Bluetooth device so that AWR1843BOOST and a PC can transmit to each other for more than 15 meters. Thanks a lot!" + } ], + "tags" : [ "/support/sensors/f/1023/tags/AWR1843BOOST", "/support/sensors/f/1023/tags/bluetooth", "/support/sensors/f/1023/tags/wireless" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900518.json b/data/json/DLP/900518.json new file mode 100644 index 0000000000000000000000000000000000000000..2fdae37a5d1ec8de3b8c7ddc3af10784f7209db5 --- /dev/null +++ b/data/json/DLP/900518.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900518", + "reporterName" : "ACGUY", + "rankPoints" : "8155", + "resolutionStatus" : "", + "ticketName" : "LM74670-Q1: Bridged circuit for AC24Vin", + "rankName" : "Mastermind", + "replies" : " 2", + "views" : " 23", + "queryText" : "Part Number: LM74670-Q1 Hello E2E, Our customer are considering using the LM74670 for AC24Vin block on during to developing equipment. I obtained the capture of schematic from them. Couldcompany engineers check this schematic? Best regards, ACGUY", + "partNumber" : " LM74670-Q1", + "allResponseList" : [ { + "contentId" : "3329150", + "userName" : "Karikalan Selvaraj", + "rankPoints" : "13870", + "rankName" : "Genius", + "date" : "Apr 27, 2020 4:36 PM", + "userId" : "1601212", + "content" : "Hi Thank you for posting question on AC full bridge rectification. Let me review the schematic and get back to you. Is the maximum current limited to 8A from the DC load side? Regards, Kari." + }, { + "contentId" : "3329701", + "userName" : "ACGUY", + "rankPoints" : "8155", + "rankName" : "Mastermind", + "date" : "Apr 28, 2020 1:09 AM", + "userId" : "4372849", + "content" : "Hi, Thank you for your comment, Output current is limited by DC/DC in the latter stage. And, customer will add the inrush current limiting circuit. Best regards, ACGUY" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM74670_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900519.json b/data/json/DLP/900519.json new file mode 100644 index 0000000000000000000000000000000000000000..8f09c1a10115e695f9f060914d9cda1bea391384 --- /dev/null +++ b/data/json/DLP/900519.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900519", + "reporterName" : "ACGUY", + "rankPoints" : "8155", + "resolutionStatus" : "", + "ticketName" : "UCC28019A: for AC24Vin", + "rankName" : "Mastermind", + "replies" : " 2", + "views" : " 36", + "queryText" : "Part Number: UCC28019A Hello E2E, Our customer are considering using the UCC28019A for AC24Vin block on during to developing equipment. I obtained the capture of schematic from them. Couldcompany engineers check this schematic? Best regards, ACGUY", + "partNumber" : " UCC28019A", + "allResponseList" : [ { + "contentId" : "3328643", + "userName" : "John Griffin1", + "rankPoints" : "32175", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 11:42 AM", + "userId" : "1693693", + "content" : "Hello ACGUY, It is unusual to use the smart diode controller LM74670 and synchronous rectification on a pfc stage. The very low input impedance into the large bus capacitance may cause a very large inrush current at start up and failure of a component unless some inrush protection is added to the pfc. I think a startup resistor is required to pre charge the output capacitors. Normally you would short out this resistor after a pre determined time and then enable the pfc. The design should give excellent efficiency but it needs to be protected from transient conditions. Im not sure what value of inductance is used but it needs to be 160uH or greater for this application. Those are my only comments." + }, { + "contentId" : "3329704", + "userName" : "ACGUY", + "rankPoints" : "8155", + "rankName" : "Mastermind", + "date" : "Apr 28, 2020 1:13 AM", + "userId" : "4372849", + "content" : "Hello John, Thank you for your comment. About settings RC value, does this schematic have any mistake? Best regards, ACGUY" + } ], + "tags" : [ "/support/power-management/f/196/tags/ucc28019A" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900529.json b/data/json/DLP/900529.json new file mode 100644 index 0000000000000000000000000000000000000000..1184fa73cb39279fd52790b70059a4f5b10dcba6 --- /dev/null +++ b/data/json/DLP/900529.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900529", + "reporterName" : "AMARNATH M", + "rankPoints" : "155", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS3702-Q1: SET pin open", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 8", + "queryText" : "Part Number: TPS3702-Q1 Hi, Please let me know is it mandatory to connect SET pin. What will happen if it is floating? Regards, Amar.", + "partNumber" : " TPS3702-Q1", + "allResponseList" : [ { + "contentId" : "3329870", + "userName" : "Abhinav.Sharma", + "rankPoints" : "6855", + "rankName" : "Expert", + "date" : "Apr 28, 2020 4:26 AM", + "userId" : "4691355", + "content" : "Hi Amar, It is mandatory to connect the SET pin on this device to select the threshold level. The device requires an accuracy band to be set to be able to trip at the correct voltage level. If the pin is floating, it will not be able to correctly distinguish between the desired levels on the device. Thanks, Abhinav." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS3702_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900530.json b/data/json/DLP/900530.json new file mode 100644 index 0000000000000000000000000000000000000000..a277a8fe43b638e3383a2af110191b1306ba707b --- /dev/null +++ b/data/json/DLP/900530.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900530", + "reporterName" : "Tasos karanikas", + "rankPoints" : "15", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ25570EVM-206: BQ25570EVM-206", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 12", + "queryText" : "Part Number: BQ25570EVM-206 Hi, I have the above evaluation board, and for the purpose of my master thesis i must do calculation with simulink or pspice. Is there any model existed for the above ic?", + "partNumber" : " BQ25570EVM-206", + "allResponseList" : [ { + "contentId" : "3329070", + "userName" : "Jeff F", + "rankPoints" : "88360", + "rankName" : "Guru", + "date" : "Apr 27, 2020 3:54 PM", + "userId" : "8433", + "content" : "Tasos, Unfortunately, there is no Simulink model. There is an older, no longer supported PSpice (TI-Tina spice) model for BQ25504 and possibly BQ25505 but those are scheduled for web removal soon. The models are very simplified and do not account for all operating conditions. Regards, Jeff" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25570%2bPSPICE", "/support/power-management/f/196/tags/SIMULINK%2bMODEL", "/support/power-management/f/196/tags/BQ25570EVM_2D00_206" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900538.json b/data/json/DLP/900538.json new file mode 100644 index 0000000000000000000000000000000000000000..1c82f86d970ecc2b3ae04df024a2568bc594e4b6 --- /dev/null +++ b/data/json/DLP/900538.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900538", + "reporterName" : "Klaus Produktionstechnik", + "rankPoints" : "140", + "resolutionStatus" : "", + "ticketName" : "BQ2085-V1P3: Flashing Default senc file to BQ2085", + "rankName" : "Prodigy", + "replies" : " 3", + "views" : " 20", + "queryText" : "Part Number: BQ2085-V1P3 Hallo experts, How can I flash the default senc file mentioned in this thread? -> Should I use the bq2083 EVSW ? Thanks for helping us.", + "partNumber" : " BQ2085-V1P3", + "allResponseList" : [ { + "contentId" : "3329293", + "userName" : "Shirish", + "rankPoints" : "2420", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 6:07 PM", + "userId" : "28063", + "content" : "Have you tried with the bq2085 EVSW? There is no need to program the whole senc file. Just a .dfi or .rom file is sufficient. Is there a specific reason to program the whole senc file?" + }, { + "contentId" : "3329998", + "userName" : "Klaus Produktionstechnik", + "rankPoints" : "140", + "rankName" : "Prodigy", + "date" : "Apr 28, 2020 6:55 AM", + "userId" : "3583489", + "content" : "Hi Shirish, thanks for your answer. How can I generate a *.dfi or a *.rom. I know these files only from bq20z95 or 20z65 with the the bq Evaluation Software (/tool/BQ20Z65-R1_BQEVSW-SW). For the bq2085 I have to use the bqEVSW, isn´t it? Where can I read back a *.dfi? Is there a other EVSW for the bq2085? The reason why I do this is because I want to understand the bq2085 better. We have some old products that may need a cell change. Thanks for helping us." + }, { + "contentId" : "3330011", + "userName" : "Klaus Produktionstechnik", + "rankPoints" : "140", + "rankName" : "Prodigy", + "date" : "Apr 28, 2020 7:08 AM", + "userId" : "3583489", + "content" : "Hi Shirish, thanks for your answer. I am using the bq2083 Evaluation Software Version 2.5.0 How can I generate with this Software a *.dfi or *.rom? I know these files only from the bq20z90 or bq20z65 with the bqEvaluation Software (). Thanks for helping us." + } ], + "tags" : [ "/support/power-management/f/196/tags/bq2085", "/support/power-management/f/196/tags/bq2085_2D00_V1P3" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900547.json b/data/json/DLP/900547.json new file mode 100644 index 0000000000000000000000000000000000000000..f714ee8c3d9c3930cdd67784a712359404747d37 --- /dev/null +++ b/data/json/DLP/900547.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900547", + "reporterName" : "Dinesh S1", + "rankPoints" : "160", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "IWR6843ISK: Boot IWRxxxx chip into the primary boot-loader from application", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 12", + "queryText" : "Part Number: IWR6843ISK Hello Team, I'm developing an interface in the RTOS application to boot into the primary boot-loader on soft-reset. As per my study, the MSS R4F processor has been enabled to boot from TCMA region and the MSS_TCMA_ROM section seems to be eclipsed by bootrom code. Only the post-eclipse view with MSS_TCMA_RAM remapped to 0x00000000 is visible to the application. I would like to disable ROM eclipsing, retain the pre-eclipse view for my use case or restore pre-eclipse view by fetching the ROM code into the TCMA RAM and remap the address table if that is possible. Could you please suggest on feasibility of disabling the ROM eclipsing in the ROM code via some commands or developer details on fetching the bootrom code into TCMA RAM. Thanks, Dinesh", + "partNumber" : " IWR6843ISK", + "allResponseList" : [ { + "contentId" : "3329705", + "userName" : "Nitin Sakhuja", + "rankPoints" : "21725", + "rankName" : "Mastermind", + "date" : "Apr 28, 2020 1:13 AM", + "userId" : "1602842", + "content" : "Hi Dinesh, ROM Eclipsing is performed by the Bootrom itself and hence it is not possible to disable this functionality and/or fetch the bootrom code in software. Could you provide some details on your use case and what you are trying to achieve? Thanks -Nitin" + } ], + "tags" : [ "/support/sensors/f/1023/tags/bootROM", "/support/sensors/f/1023/tags/primary%2bbootloader", "/support/sensors/f/1023/tags/IWR6843ISK", "/support/sensors/f/1023/tags/ROM%2bEclipsing" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900550.json b/data/json/DLP/900550.json new file mode 100644 index 0000000000000000000000000000000000000000..2580635bc357efc9295c19df1092e6216adb99e3 --- /dev/null +++ b/data/json/DLP/900550.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900550", + "reporterName" : "Ted Mawson 3.0", + "rankPoints" : "1785", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC256403: Best Devices for Bench Power Supply with multiple Isolated Outputs", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 11", + "queryText" : "Part Number: UCC256403 I am coming up with a multi-output bench PSU design that's inspired by Linear's reference design here. The requirement is for a 3 channel PSU with isolated outputs: two would be 0-32V at 6A and one would be 0-6V at 6A. That Linear (now AD) design pre regulates the incoming voltage with a SMPS which tracks the output voltage +1.7V thus minimizing the power dissipated in the linear stage. I was looking for a suitablecompany part to mimic the functionality of the LT8612 in that design. There are a few questions I have: 1. What IC would match the LT8612 but ideally also add isolation? I put the UCC25640-3DDBR in this thread as this is a part that I got from a WEbench design for a 40-50V input, 5V 6A isolated output design but maybe that won't be a good choice as, I'd like to be able to vary the SMPS output between 1.7 and 33,7 V and there's no way to specifiy that in WEbench that I can see. 2. The Linear reference design uses a 40V DC input which could be met by a frame SMPS at 48V, 400W. The idea did occur to me that I could have the switcher circuit in item 1 above regulate all the way from the rectified AC input down to 1.7V (doing away with the need for the frame PSU) but this is probably impractical at the currents I want plus I would still need 3 circuits to get isolation between channels and my PCB would end up having 400V DC on it! 3. Those isolated designs in WEbench give part numbers for cores and a turns ratio for primary and secondaries but, where can I get practical guidance for actual wire gage and number of turns? Thanks in advance.", + "partNumber" : " UCC256403", + "allResponseList" : [ { + "contentId" : "3329389", + "userName" : "Mike O'", + "rankPoints" : "27215", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 7:25 PM", + "userId" : "10947", + "content" : "Hello LLC, Converters operate extremally well with an input off less then two to 1. Or a varying output of two one that being said I would recommend against using the UCC256403 for this application. Be cause you have one output that is going to vary 1.7V to 33V and the other output is 0 to 6V. You might want to use a UCC28C42 for a simple fly back for each at those power levels. Regards, Mike" + } ], + "tags" : [ "/support/power-management/f/196/tags/SMPS", "/support/power-management/f/196/tags/UCC256403" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900553.json b/data/json/DLP/900553.json new file mode 100644 index 0000000000000000000000000000000000000000..739f9e8c6db818f5873e2b0dbd5cb6331293d2fe --- /dev/null +++ b/data/json/DLP/900553.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900553", + "reporterName" : "Roy Chou1", + "rankPoints" : "1580", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM5155-Q1: buck-boost mode in flyback", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 8", + "queryText" : "Part Number: LM5155-Q1 Hi Team, My customer is finding the isolated DC/DC solution and below is the spec. Vin = 13V-36V (nominal = 24V) Vout = 24V Iout = 4A I find that LM5155-Q1 could meet their requirement. Do you have any more appropriate solution? Thank you for your support. Regards, Roy", + "partNumber" : " LM5155-Q1", + "allResponseList" : [ { + "contentId" : "3329476", + "userName" : "Garrett Roecker", + "rankPoints" : "18240", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 8:39 PM", + "userId" : "3456925", + "content" : "Hi Roy, Thanks for reaching out with your questions and for considering the LM5155 in your design For a flyback converter 100W is achievable but will need to ensure the output diode isn't too hot at full load. To work around this the UCC24612 can used to make the flyback a synchronous topology as shown in PMP40569. A good staring point for this design is PMP22151. Please let me know if you have any questions. Thanks, Garret" + }, { + "contentId" : "3329829", + "userName" : "Roy Chou1", + "rankPoints" : "1580", + "rankName" : "Intellectual", + "date" : "Apr 28, 2020 3:27 AM", + "userId" : "6162312", + "content" : "Hi Garrett, Thank you for your comments. In addition, the customer would concern the efficiency of light load, do we have more appropriate solution? Regards, Roy" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM5155_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900554.json b/data/json/DLP/900554.json new file mode 100644 index 0000000000000000000000000000000000000000..c414693a2d43fd01360f1deebc810c6ea13036c2 --- /dev/null +++ b/data/json/DLP/900554.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900554", + "reporterName" : "Tony xiong", + "rankPoints" : "530", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC256402: How is OCP validated and tested", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 11", + "queryText" : "Part Number: UCC256402 Hi Friends: I want to verify OCP's functionality. Is there any way to verify OCP's functionality? OCP1 / OCP2 / OCP3, what are the methods of verification respectively; Thank you", + "partNumber" : " UCC256402", + "allResponseList" : [ { + "contentId" : "3329403", + "userName" : "Mike O'", + "rankPoints" : "27215", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 7:38 PM", + "userId" : "10947", + "content" : "Hello, Sure there is adjust the output current and monitor the ISNS, DRV, HO and lower pins and vary the load on the output just make sure the device does what is supposed to based on the block diagram, the capacitor dividers and the VISNSE_OCP1/2/3 thresholds specified in the data sheet. I would also recommend that your resonant capacitor, VCR and ISNS dividers are setup correctly for this as well. You can use the equations in the data sheet or the excel design tool that can be found at the following link. /lit/zip/sluc675 Regards," + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC256402" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900555.json b/data/json/DLP/900555.json new file mode 100644 index 0000000000000000000000000000000000000000..cdbcf97d0750aaf8b90d5f8470ea6d41d8860144 --- /dev/null +++ b/data/json/DLP/900555.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900555", + "reporterName" : "Will Jarrett", + "rankPoints" : "1560", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ40Z80: Update the QMAX and RA tables during rest cycles", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 16", + "queryText" : "Part Number: BQ40Z80 Can you link me to the documentation or describe the process to update the QMAX and RA tables of the Bq40Z80 during rest cycles? I have a customer that is able to implement the process, but not consistently. I'd like to make sure he is checking all of the boxes for the process. Thank you!", + "partNumber" : " BQ40Z80", + "allResponseList" : [ { + "contentId" : "3328891", + "userName" : "Damian Lewis", + "rankPoints" : "33210", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 2:26 PM", + "userId" : "69960", + "content" : "Hello Will, here's the learning cycle document for bq40z80. /lit/an/slua848/slua848.pdf" + } ], + "tags" : [ "/support/power-management/f/196/tags/bq40z80" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900556.json b/data/json/DLP/900556.json new file mode 100644 index 0000000000000000000000000000000000000000..811f4a450c890d6e93d5da667299649145f1803c --- /dev/null +++ b/data/json/DLP/900556.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900556", + "reporterName" : "Tak", + "rankPoints" : "150", + "resolutionStatus" : "", + "ticketName" : "UCC28780: About the calculation formula of ΔB", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 8", + "queryText" : "Part Number: UCC28780 The calculation formula of ΔB is described in P40 of the data sheet. (8.2.2.2.3-2) Is this formula true for all output conditions? For example, consider a rated output of 192W (32V, 6A). In that case, I think I should enter 192 in Po (fl). As a result, I think Im +, ΔB, Fsw, D, etc. will be calculated. If I want to know Im +, ΔB, Fsw, D under the condition of 14W (1 / 8Po (fl)), should I input 14 to Po (fl)? Also, can I think of it as a formula that can be applied to both AAM and ABM? Also, please advise us about the air gap of the transformer used for the evaluation board. When I use the small core (RM8), the gap is over 1mm. If the inductance value is set to about 30uH, it will be about 1.5mm. I'm worried that it's too big, but is it acceptable for a small high-frequency flyback? (Please tell us the common air gap value. If it is a normal flyback (100 kHz or less), I will redesign it if it becomes 1 mm or more) However, if the leakage inductance is intentionally used in this circuit method, is it OK to consider a large gap value? There is a concern that the gap exceeds 1 mm, but if there is a tendency peculiar to this circuit, prototype it and evaluate it. Of course, if you recommend a gap of 1 mm or less, redesign. (Increase the core size, etc.) B.R.Tak", + "partNumber" : " UCC28780", + "allResponseList" : [ { + "contentId" : "3329423", + "userName" : "Mike O'", + "rankPoints" : "27215", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 7:53 PM", + "userId" : "10947", + "content" : "Hello, I just wanted to let you know that an applications engineer is looking into this and will get back to you within the next two days. Regards," + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC28780" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900564.json b/data/json/DLP/900564.json new file mode 100644 index 0000000000000000000000000000000000000000..f28541ad784fe8cdabb91e1c8b2f4011fb0c05e2 --- /dev/null +++ b/data/json/DLP/900564.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900564", + "reporterName" : "Klaus Moelholm65", + "rankPoints" : "130", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS55160-Q1: Higher input voltage capability", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 7", + "queryText" : "Part Number: TPS55160-Q1 Hi I consider using a LM5176 with an input voltage down to 3.6V and it will therefore need a 9V bias voltage. For this task TPS55160-Q1 was suggested but the issue with this part is that the max input voltage is 36V and the abs. max. is 40V. But in my application we have the following specifications: Nominal Input voltage: 3.6 to 36V Input overvoltage TVS protection = TPSMA6L36A: VbrMax = 44.2V @ It = 1mA Output voltage: 9V Output current: 4mA Ambient temperature: The board will be mounted inside a box with no air flow and the temperature inside the box is estimated to be up to about 83C and down do -40C. The building height should be kept below 4mm where possible, and the absolute max building height is 8 mm. If You have any suggestion for a similar part that can handle higher voltages, it would be a big help. Best regards Klaus", + "partNumber" : " TPS55160-Q1", + "allResponseList" : [ { + "contentId" : "3329805", + "userName" : "Helen chen", + "rankPoints" : "32965", + "rankName" : "Mastermind", + "date" : "Apr 28, 2020 2:53 AM", + "userId" : "4197150", + "content" : "Dear Sir, The closest part is TPS55160-Q1, but you need to clamp the maximum input at 36V . Ensure it will never exceed this value. LM5176 is OK, but it is a little bit over design. You can also use LM5001 in Sepic topology." + }, { + "contentId" : "3329975", + "userName" : "Klaus Moelholm65", + "rankPoints" : "130", + "rankName" : "Prodigy", + "date" : "Apr 28, 2020 6:32 AM", + "userId" : "4608119", + "content" : "Dear Helen, I agree that a LM5176 design would be to big. LM5001 looks more tempting but when I try to enter my requirements in WEBENCH I get different error messages when Try to update my design. Best regards Klaus" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM5176", "/support/power-management/f/196/tags/TPS55160_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900566.json b/data/json/DLP/900566.json new file mode 100644 index 0000000000000000000000000000000000000000..37758d7fbec300bde0addeb15d8643af7a11eb11 --- /dev/null +++ b/data/json/DLP/900566.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "900566", + "reporterName" : "ibrahim Toy", + "rankPoints" : "220", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "PGA300EVM-034: PGA", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 27", + "queryText" : "Part Number: PGA300EVM-034 Hi Guys, I have got a problem about PGA300 calibration. The error is in the below. Thank you for your help, Best Regards", + "partNumber" : " PGA300EVM-034", + "allResponseList" : [ { + "contentId" : "3328823", + "userName" : "Scott Cummins", + "rankPoints" : "22105", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 1:49 PM", + "userId" : "3747857", + "content" : "Hello Ibrahim, After what step in the calibration do you see the error? The most likely reason is that there is something incorrect in the configuration file. Can you share the configuration file you used for this calibration? Thanks," + }, { + "contentId" : "3328840", + "userName" : "ibrahim Toy", + "rankPoints" : "220", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 2:01 PM", + "userId" : "5998602", + "content" : "Hello Scott, I get the error after activating OWI in \"Guided Calibration\". The Calibration file is in the attachment. Thanks, Calibration Settings - 3P1T - Voltage Mode - 0 to 10.ini" + }, { + "contentId" : "3328949", + "userName" : "Scott Cummins", + "rankPoints" : "22105", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 2:53 PM", + "userId" : "3747857", + "content" : "Hi Ibrahim, It looks like the problem is in the configuration file. You currently have your Calibration Mode set to 3P-1T. However, for your Temperature Points and your Pressure Points you have 4 points each. If you would like to use 4 temperature and 4 pressure points, you should set the calibration mode to 4P-4T. Additionally, for the DAC data, you only have 3 output points. Typically you would use 4 points if you have 4 pressure points. Each DAC data point will correspond to one of your pressure points. If the number of points is mismatched you will not be able to perform the calibration. Regads," + }, { + "contentId" : "3329931", + "userName" : "ibrahim Toy", + "rankPoints" : "220", + "rankName" : "Prodigy", + "date" : "Apr 28, 2020 5:45 AM", + "userId" : "5998602", + "content" : "Thank you for your reply, I tried it but the status is unsuccesful. Could you send any running calibration file as example ? Best Regards," + } ], + "tags" : [ "/support/sensors/f/1023/tags/PGA300", "/support/sensors/f/1023/tags/PGA300EVM_2D00_034" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900568.json b/data/json/DLP/900568.json new file mode 100644 index 0000000000000000000000000000000000000000..d0975bdbada075d2b852db483334c19046e332fb --- /dev/null +++ b/data/json/DLP/900568.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "900568", + "reporterName" : "Onur Guzeldemirci", + "rankPoints" : "90", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "Compiler/DLPLCR4500EVM: DLP4500 Doesn't take any action", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 100", + "queryText" : "Part Number: DLPLCR4500EVM Tool/software:company C/C++ Compiler . I can't take any action, it remained like this I can choose the 'Led Selection' It worked fine 3 days ago Although I upload the firmware(DLPR350PROM_v4.0 - /DLPR350PROM_v4.1) In addition, in video mode not set image from flash. Nothing happens, the pattern in the picture LED under the board lights red for a while and then green and stays that way.", + "partNumber" : " DLPLCR4500EVM", + "allResponseList" : [ { + "contentId" : "3329392", + "userName" : "Onur Guzeldemirci", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 7:26 PM", + "userId" : "6300307", + "content" : "connecting cable which is a band plug with copper encrusted disscontected, I put the cable back in But I'm having this problem now There are 3 horizontal spaces" + }, { + "contentId" : "3329594", + "userName" : "Philippe Dollo", + "rankPoints" : "15915", + "rankName" : "Genius", + "date" : "Apr 27, 2020 10:51 PM", + "userId" : "4731135", + "content" : "Onur, For the first image, it looks like you have a faulty connection to the DMD. Was that the problem? As for the second image, is this a result of booting or after sending a command to the system. If so, which commands? Regards, Philippe Dollo" + }, { + "contentId" : "3329605", + "userName" : "Onur Guzeldemirci", + "rankPoints" : "90", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 10:58 PM", + "userId" : "6300307", + "content" : "For the first image, yes I solved that problem. I'm not sending a command. in addition, 3 horizontal spaces are flashing. Pressing lightly on the socket of the DMD connecting cable by hand causes the device to turn off and on again." + }, { + "contentId" : "3329881", + "userName" : "Vivek Thakur", + "rankPoints" : "9880", + "rankName" : "Genius", + "date" : "Apr 28, 2020 4:40 AM", + "userId" : "9052", + "content" : "Closing this thread. It is being answered in the following thread. /support/dlp/f/94/p/900690/3329880#3329880 regards, Vivek" + } ], + "tags" : [ "/support/dlp/f/94/tags/DLP4500", "/support/dlp/f/94/tags/_2300_dlp%2b%2b_2300_lightcrafter%2b_2300_EVM%2b_2300_dlp4500", "/support/dlp/f/94/tags/_2300_%2bFLASH", "/support/dlp/f/94/tags/DLPLCR4500EVM", "/support/dlp/f/94/tags/TI%2bC_2F00_C_2B002B00_%2bCompiler", "/support/dlp/f/94/tags/_2300_%2bDLP", "/support/dlp/f/94/tags/_2300_DLP%2b%2b_2300_4500%2b_2300_DMD%2b_2300_luminance" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900576.json b/data/json/DLP/900576.json new file mode 100644 index 0000000000000000000000000000000000000000..9c086f4794f33a76f87dca0b4cf45b415c34278a --- /dev/null +++ b/data/json/DLP/900576.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900576", + "reporterName" : "Maverick_1984", + "rankPoints" : "405", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "PTD08A020W: Two PTD08A020W parallel connection", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 15", + "queryText" : "Part Number: PTD08A020W I use UCD9248 as power controller and PTD08A020W as power stage. One PTD08A020W module is not enough to supply current considering my application. I use 2 PTD08A020W modules in parallel connection source up to 40A current. I am not sure how to connect the modules in parallel. Can I just connect the VOUT of the two stage? The datasheet shows connecting VOUT is OK. But I am worried if two stages output voltage with a slight difference, the power stage outputing a higher voltage will source the power stage outputing a lower stage.", + "partNumber" : " PTD08A020W", + "allResponseList" : [ { + "contentId" : "3329213", + "userName" : "iAlejandro", + "rankPoints" : "2390", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 5:08 PM", + "userId" : "5259049", + "content" : "Hi Maverick, As you mentioned, connecting the VOUT of the two stages like in Figure 19 of datasheet should be okay. Your concern over the two power stages connected like this is reasonable, due to all identical DC/DC converters will not have symmetrical output. But, that is where this particular controller comes in. The controller integrates multi-loop management with sequencing, margin, tracking and intelligent phase management to optimize for total system efficiency. In other words, the controller provides the right protection over your concern. Regards, Alejandro" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCD9248", "/support/power-management/f/196/tags/PTD08A020W" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900578.json b/data/json/DLP/900578.json new file mode 100644 index 0000000000000000000000000000000000000000..8a6cf2a2954edb106d186596381ecec12b994c10 --- /dev/null +++ b/data/json/DLP/900578.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900578", + "reporterName" : "Viktorija Cecil", + "rankPoints" : "15585", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TPS1H100-Q1: Sizing of ground resistor and diode", + "rankName" : "Genius", + "replies" : " 1", + "views" : " 7", + "queryText" : "Part Number: TPS1H100-Q1 Regarding the GND pin> Do you have a guide how to size the RGND resistor and the diode? Can this pin be connected directly to GND? Thanks Viktorija", + "partNumber" : " TPS1H100-Q1", + "allResponseList" : [ { + "contentId" : "3328978", + "userName" : "Anthony P Pham", + "rankPoints" : "1890", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 3:11 PM", + "userId" : "6169362", + "content" : "Hi Viktorija, The recommended resistor is a 1-kOhm resistor in parallel with a diode with a forward current greater than 100-mA diode. If you have upstream power protection such as an ideal diode on the VS pin, you can tie it directly to GND." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS1H100_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900579.json b/data/json/DLP/900579.json new file mode 100644 index 0000000000000000000000000000000000000000..eb6de3cc6c373be5f37cc02644643109bfec3d7a --- /dev/null +++ b/data/json/DLP/900579.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900579", + "reporterName" : "Zhanpeng Li", + "rankPoints" : "570", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "BQ25970: How to calculate the resistance in bq25970 while fast charging", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 11", + "queryText" : "Part Number: BQ25970 Hi team, How to calculate the resistance in bq25970 while fast charging? do we have any guideline? BR brandon.", + "partNumber" : " BQ25970", + "allResponseList" : [ { + "contentId" : "3329613", + "userName" : "Angelo Zhang87", + "rankPoints" : "6530", + "rankName" : "Expert", + "date" : "Apr 27, 2020 11:08 PM", + "userId" : "5346700", + "content" : "Hi Brandon, Please check your email. I just sent you detailed BQ25970 information regarding your question. Thanks! Best regards, Angelo" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ25970" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900580.json b/data/json/DLP/900580.json new file mode 100644 index 0000000000000000000000000000000000000000..cd7a6a54a1c14031444be1f4db20806d009843d4 --- /dev/null +++ b/data/json/DLP/900580.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900580", + "reporterName" : "Jitendra Singh7", + "rankPoints" : "1095", + "resolutionStatus" : "", + "ticketName" : "BQ27220: Drastic drop in battery percentage read by gauge", + "rankName" : "Expert", + "replies" : " 2", + "views" : " 15", + "queryText" : "Part Number: BQ27220 Hello, This is in reference to below discussion. /support/power-management/f/196/t/882904 After updating the Hold time for EDV0, EDV1 and EDV2. The issue is rarely reproduced. But the issue still occurs. After reconfiguring the gauge the gauge starts giving correct readings. 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[2020-04-16 06:12:24.883] [I] [CTRL] GAUGE READ SUCCESS: 1Percent 3561mV -58mA 33C [2020-04-16 06:17:24.903] [I] [CTRL] GAUGE READ SUCCESS: 1Percent 3561mV -58mA 33C [2020-04-16 06:22:24.919] [I] [CTRL] GAUGE READ SUCCESS: 1Percent 3560mV -58mA 33C [2020-04-16 06:27:24.935] [I] [CTRL] GAUGE READ SUCCESS: 1Percent 3560mV -58mA 33C [2020-04-16 06:32:24.951] [I] [CTRL] GAUGE READ SUCCESS: 1Percent 3559mV -58mA 33C [2020-04-16 06:37:24.972] [I] [CTRL] GAUGE READ SUCCESS: 1Percent 3559mV -58mA 33C [2020-04-16 06:42:24.989] [I] [CTRL] GAUGE READ SUCCESS: 1Percent 3559mV -58mA 33C [2020-04-16 06:47:25.004] [I] [CTRL] GAUGE READ SUCCESS: 1Percent 3558mV -58mA 33C Below is the confiruration i am writing: W:AA3E0200 C:AA3E020002200003 W:AA3EB491FEFC000300000000CBD41A05D4864AC6B4C26E2B037C0148FDA3F67512582DB7 W:AA606524 X:10 W:AA3EB491 C:AA3EB491FEFC000300000000CBD41A05D4864AC6B4C26E2B037C0148FDA3F67512582DB7 W:AA3ED4911C9802D3FFB9300100EF0511 W:AA602310 X:10 W:AA3ED491 C:AA3ED4911C9802D3FFB9300100EF0511 W:AA3E809100000BD67E760098930BF2AF W:AA604210 X:10 W:AA3E8091 C:AA3E809100000BD67E760098930BF2AF W:AA3EF591000001C2003200C81068 W:AA60440E X:10 W:AA3EF591 C:AA3EF591000001C2003200C81068 W:AA3E01920064 W:AA600806 X:10 W:AA3E0192 C:AA3E01920064 W:AA3E329202260201F40258020226F6 W:AA60A20F X:10 W:AA3E3292 C:AA3E329202260201F40258020226F6 W:AA3E069204841000 W:AA60CF08 X:10 W:AA3E0692 C:AA3E069204841000 W:AA3E0B92010900009600AF W:AA60130B X:10 W:AA3E0B92 C:AA3E0B92010900009600AF W:AA3E12920220 W:AA603906 X:10 W:AA3E1292 C:AA3E12920220 W:AA3E1792000A05003201C21414 W:AA602A0D X:10 W:AA3E1792 C:AA3E1792000A05003201C21414 W:AA3E2892003C004B0028003C3C01 W:AA601D0E X:10 W:AA3E2892 C:AA3E2892003C004B0028003C3C01 W:AA3E40920C4E020CB2 W:AA601309 X:10 W:AA3E4092 C:AA3E40920C4E020CB2 W:AA3E7F920C8C8C0BB80C1C000510681004645F0C800CE4060810681004645F W:AA60B21F X:10 W:AA3E7F92 C:AA3E7F920C8C8C0BB80C1C000510681004645F0C800CE4060810681004645F W:AA3E9A9200102A29042904 W:AA603F0B X:10 W:AA3E9A92 C:AA3E9A9200102A29042904 W:AA3E8F4100 W:AA602F05 X:10 W:AA3E8F41 C:AA3E8F4100 W:AA3E7D925A W:AA609605 X:10 W:AA3E7D92 C:AA3E7D925A W:AA3E519202BC W:AA605E06 X:10 W:AA3E5192 C:AA3E519202BC W:AA3E5B9277 W:AA609B05 X:10 W:AA3E5B92 C:AA3E5B9277 W:AA3E649205DC W:AA602806 X:10 W:AA3E6492 C:AA3E649205DC W:AA3E689214000000C800006464080E7400641F40 W:AA601414 X:10 W:AA3E6892 C:AA3E689214000000C800006464080E7400641F40 W:AA3EA3920E7400640E9F009503630FBE013C0900000BD7C80D39C80DADC8104D0FCB0F55 W:AA605424 X:10 W:AA3EA392 C:AA3EA3920E7400640E9F009503630FBE013C0900000BD7C80D39C80DADC8104D0FCB0F55 W:AA3EC3920EED0E8D0E480E230DFE0DBB0D6F0A99 W:AA609B14 X:10 W:AA3EC392 C:AA3EC3920EED0E8D0E480E230DFE0DBB0D6F0A99 W:AA3E7B92023C W:AA60B406 X:10 W:AA3E7B92 C:AA3E7B92023C Regards", + "partNumber" : " BQ27220", + "allResponseList" : [ { + "contentId" : "3329470", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 8:35 PM", + "userId" : "1864278", + "content" : "Hi Jitendra, Could you please export a gg file in the bqStudio so that we can check your configurations? Also, your log file doesn't have enough information we are looking for. Please share a bqStudio log file which has quite a lot of run-time information. Andy" + }, { + "contentId" : "3329513", + "userName" : "Jitendra Singh7", + "rankPoints" : "1095", + "rankName" : "Expert", + "date" : "Apr 27, 2020 9:10 PM", + "userId" : "4773733", + "content" : "Hi Andy, I will provide you the gg file tomorrow. The logs are from the devices in field. This issue is rarely reproduced. Thats the reason the logs do not have details. But i can dump the content of gauge when this issue occurs. Can you point out any reason for this? I have already set edv timeout to 200 seconds. I need one more clearity. What is the correct sequence before pushing data memory config to bq27220. Sometimes it is observed that the configuration fails if the host tries to configure gauge back to back. I checked in bq studio in case of failure, cfgupdate flag is set but gauge was not in unsealed full access mode. Please peovide me sequence of commands with delay between them required before sending the configuration." + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ27220" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900582.json b/data/json/DLP/900582.json new file mode 100644 index 0000000000000000000000000000000000000000..3d03c7bf321bf0b4a12a994e7ceffc148a2ae886 --- /dev/null +++ b/data/json/DLP/900582.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900582", + "reporterName" : "user6333891", + "rankPoints" : "10", + "resolutionStatus" : "", + "ticketName" : "BQ76942EVM: BQ7642EVM", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 5", + "queryText" : "Part Number: BQ76942EVM Dear Madam or Mister, I search a battery monitor and I interest by the BQ76952. I would like used the BQ76952EVM to test with a test bench many algortihm about state of battery. I have some questions: Can I customize the software to upload some algorithm in the microcontroller ? Can I use this EVM with Master and Slave configuration for an addition of two packs in serie or in parallele ? Thank you in advance for your attention Sincerely, Jérémy", + "partNumber" : " BQ76942EVM", + "allResponseList" : [ { + "contentId" : "3328867", + "userName" : "David Hien", + "rankPoints" : "8175", + "rankName" : "Expert", + "date" : "Apr 27, 2020 2:13 PM", + "userId" : "1054107", + "content" : "Salut Jérémy, Thank you for your interest in BQ76952 (or was it BQ76942?). You will need to use an MCU connected to the BQ76952EVM and run your algorithms on the MCU based on the data measured by BQ76952. I do not understand your second question: can you rephrase?" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ76952", "/support/power-management/f/196/tags/BQ76942EVM", "/support/power-management/f/196/tags/BQ76952EVM" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900587.json b/data/json/DLP/900587.json new file mode 100644 index 0000000000000000000000000000000000000000..60e8dbf0d4dce78ddb8f9237cdedae8ce5f3aa1c --- /dev/null +++ b/data/json/DLP/900587.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900587", + "reporterName" : "Zhanpeng Li", + "rankPoints" : "570", + "resolutionStatus" : "", + "ticketName" : "TPS40428: output voltage of BP3/BP5 is wrong", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 8", + "queryText" : "Part Number: TPS40428 Hi team, what will cause the output voltage of BP3/BP5 wrong. VDD=11.7V VBP3=0.83V VBP5=2.58V.", + "partNumber" : " TPS40428", + "allResponseList" : [ { + "contentId" : "3329282", + "userName" : "Qian Chen", + "rankPoints" : "21370", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 5:52 PM", + "userId" : "1501908", + "content" : "HI Zhanpeng, I don't see anything in schematic that can cause this problem. Can you check if there is any external circuit connected to BP3 or BP5 not shown in schematic. Also, check if there is any soldering issue. Some other comments: The resistor (R113) between CS1P and CS1N should not be populated. Power stage FCCM should be floating or pulled to VDD_5V. DCM is not supported by TPS40428. Thanks Qian" + }, { + "contentId" : "3329948", + "userName" : "Zhanpeng Li", + "rankPoints" : "570", + "rankName" : "Prodigy", + "date" : "Apr 28, 2020 6:07 AM", + "userId" : "6114388", + "content" : "Hi Qian, I don't see any external circuit around BP3/BP5. I also attached the full schematic of TPS40428 as follow: 1856.power.pdf could you help check the schematic? also, our customer were tested under no-live load, does this effect the voltage of BP3/BP5? customer also used 2pcs of TPS40428 in 4 phase application. BR Brandon." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS40428" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900589.json b/data/json/DLP/900589.json new file mode 100644 index 0000000000000000000000000000000000000000..2af18721777432727b9690b7de787663891e7c3d --- /dev/null +++ b/data/json/DLP/900589.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900589", + "reporterName" : "Hide", + "rankPoints" : "17290", + "resolutionStatus" : "Resolved", + "ticketName" : "UCC27714: About 4A Peak Output", + "rankName" : "Guru", + "replies" : " 2", + "views" : " 9", + "queryText" : "Part Number: UCC27714 Hi Team, I understand that “4A peak Output ” is HO and LO total current. (I referred to \"IOUT of Absolute Maximum Ratings\" and \"IGPK of OUTPUT BLOCK\".) -OK case: HO peak output current is 4A, LO peak output current is 0A (Total 4A peak output and PW <100ns) -OK case: HO peak output current is 2A, LO peak output current is 2A (Total 4A peak output and PW < 10us) -NG case: HO peak output current is 3A, LO peak output current is 3A (Total 6A peak output) Is my understanding correct? Regards, Hide", + "partNumber" : " UCC27714", + "allResponseList" : [ { + "contentId" : "3328944", + "userName" : "Richard Herring", + "rankPoints" : "9680", + "rankName" : "Genius", + "date" : "Apr 27, 2020 2:52 PM", + "userId" : "618157", + "content" : "Hello Hide, The UCC27714 driver HO and LO outputs are rated at 4A typical on each channel. Each driver output is capable of the 4A peak output even if both outputs are active at the same time. There is a limitation of the average, or DC current of 250mA on each output, which is usually not a concern when switching MOSFET Vgs as the peak gate currents are very low duty cycle. Confirm if this addresses your questions, or you can post additional questions on this thread. Regards," + }, { + "contentId" : "3329658", + "userName" : "Hide", + "rankPoints" : "17290", + "rankName" : "Guru", + "date" : "Apr 28, 2020 12:11 AM", + "userId" : "1939929", + "content" : "Hi Richard-san, Thank you for your prompt reply and information. I greatly appreciate your cooperation. Regards, Hide" + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC27714" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900596.json b/data/json/DLP/900596.json new file mode 100644 index 0000000000000000000000000000000000000000..1271c482d3e432d1abc31e7c3e730951d7007eb9 --- /dev/null +++ b/data/json/DLP/900596.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "900596", + "reporterName" : "JoeP", + "rankPoints" : "60", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "TMP102: TMP102", + "rankName" : "Prodigy", + "replies" : " 5", + "views" : " 21", + "queryText" : "Part Number: TMP102 I've downloaded the tmp102.c file (drivers/hwmon/tmp102.c) and I want to use it in an Eclipse project, details below... Eclipse IDE for C/C++ Developers Version: 2019-09 R (4.13.0) Build id: 20190917-1200 OS: Linux, v.4.19.0-6-amd64, x86_64 / gtk 3.24.5 Java version: 11.0.4 If I check the Linux device tree documentation on thecompany tmp102 page (...I2C/trivial-devices.txt) it says the path's not found. If I check Other Files on thecompany tmp102 page (Documentation/hwmon/tmp102) it says the path's not found. So, I've started a new c project withthe tmp102.c file, but I've got a problem that Eclipse reports fatal errors since it doesn't know where some of the Linux headers are installed, see below... Can you please advise where I'd find these headers? Thanks", + "partNumber" : " TMP102", + "allResponseList" : [ { + "contentId" : "3329027", + "userName" : "Josh Wyatt", + "rankPoints" : "61360", + "rankName" : "Guru", + "date" : "Apr 27, 2020 3:32 PM", + "userId" : "614", + "content" : "Dear JoeP - I see what you mean - it looks like the paths that cannot be found were changed to: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/devicetree/bindings/trivial-devices.yaml and https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/hwmon/tmp102.rst" + }, { + "contentId" : "3329096", + "userName" : "JoeP", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 4:07 PM", + "userId" : "1093934", + "content" : "Hi Josh, First thanks for your quick reply. The link you sent me is for \"Trivial I2C and SPI devices that have simple device tree bindings\" it looks like a it's a list of programs that people have written to help them use these devices quickly - nice idea, but it doesn't help me in specifying where Eclipse can go to find the .h files that are missing. Any ideas? Thanks" + }, { + "contentId" : "3329106", + "userName" : "Josh Wyatt", + "rankPoints" : "61360", + "rankName" : "Guru", + "date" : "Apr 27, 2020 4:11 PM", + "userId" : "614", + "content" : "also, found this here for you https://github.com/torvalds/linux/blob/master/drivers/hwmon/tmp102.c" + }, { + "contentId" : "3329139", + "userName" : "JoeP", + "rankPoints" : "60", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 4:28 PM", + "userId" : "1093934", + "content" : "Hi Josh, thanks the file you found is just the tmp102.c file again. If you see from the top of the file there's lots of #include files - my problem is I don't know where these files are - so I can't specify the path for the compiler JoeP" + }, { + "contentId" : "3329177", + "userName" : "Josh Wyatt", + "rankPoints" : "61360", + "rankName" : "Guru", + "date" : "Apr 27, 2020 4:51 PM", + "userId" : "614", + "content" : "Dear JoeP - all of the listed include files are in the kernel, located here: https://github.com/torvalds/linux/tree/master/include/linux" + } ], + "tags" : [ "/support/sensors/f/1023/tags/TMP102" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900597.json b/data/json/DLP/900597.json new file mode 100644 index 0000000000000000000000000000000000000000..7ea3a3cc0935c91c80cb2a5909a9a70a5de22c35 --- /dev/null +++ b/data/json/DLP/900597.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900597", + "reporterName" : "Daniel Cook1", + "rankPoints" : "110", + "resolutionStatus" : "", + "ticketName" : "LM3914: LM3914VX Bank Issue", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 11", + "queryText" : "Part Number: LM3914 Hi, I'm trying to use the new generation of the LM3914VX device, we have used the older 18 pin dip device. When we try and use the pins 14 thru 18 we have an issue with the sinking of the voltage for LED use. The other bank for pins 12 and 13 and bank for 20, 19 and pin 1 work well. This acts like the bank is not connected. We have tried 3 units with the same result. Thank You Daniel Cook", + "partNumber" : " LM3914", + "allResponseList" : [ { + "contentId" : "3328962", + "userName" : "Costin Cazana", + "rankPoints" : "4080", + "rankName" : "Expert", + "date" : "Apr 27, 2020 3:01 PM", + "userId" : "18391", + "content" : "Hi, I have notified our expert regarding this topic. Please expect a response by 430/20. Regards, Costin" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM3914VX", "/support/power-management/f/196/tags/LM3914" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900600.json b/data/json/DLP/900600.json new file mode 100644 index 0000000000000000000000000000000000000000..38b54d2907ce6f6a756d5d84f28e0c1905a13dd4 --- /dev/null +++ b/data/json/DLP/900600.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900600", + "reporterName" : "JOHNSE MATHEW", + "rankPoints" : "10", + "resolutionStatus" : "", + "ticketName" : "DLP NIRscan Nano GUI (Windows) : Possibility to install in network", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 9", + "queryText" : "I would like to know if it is possible to install the DLP NIRscan Nano GUI (Windows) (version 2.1.0 )in a network and be accesed by multiple users.", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3329561", + "userName" : "Vivek Thakur", + "rankPoints" : "9880", + "rankName" : "Genius", + "date" : "Apr 27, 2020 10:19 PM", + "userId" : "9052", + "content" : "Hello Johnse, Welcome to DLP forum and thank you for your interest in DLP technology. Could you please explain how to do you intend to use the DLP NIRScan Nano EVM? How will it be connected? regards, Vivek" + } ], + "tags" : [ "/support/dlp/f/94/tags/license" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900606.json b/data/json/DLP/900606.json new file mode 100644 index 0000000000000000000000000000000000000000..f5758ce6c91b1f201a29495fcf98b4f418a02be4 --- /dev/null +++ b/data/json/DLP/900606.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900606", + "reporterName" : "Shen Yik Chua", + "rankPoints" : "10", + "resolutionStatus" : "", + "ticketName" : "UCC28710: Unexpected simulation results with PMP9087", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 15", + "queryText" : "Part Number: UCC28710 Dear Team, I am trying to simulate the reference design PMP9087 with TINA-TI but the results are wrong. It seems like the UCC28710 spice model does not start up properly and thus the output voltage is only few millivolts. I have tried to add the DC input for VDD but it remained the same. Therefore I would want to know is this a design error of PMP9087 or is it the software simulation error? Regards, ChuaPower_Supply_Sim.TSC", + "partNumber" : " UCC28710", + "allResponseList" : [ { + "contentId" : "3329427", + "userName" : "Mike O'", + "rankPoints" : "27215", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 7:55 PM", + "userId" : "10947", + "content" : "Hello, Just wanted to let you know acompany applications engineer is looking into this for you and will get back to you within the next 3 days. Regards," + } ], + "tags" : [ "/support/power-management/f/196/tags/PMP9087", "/support/power-management/f/196/tags/UCC28710", "/support/power-management/f/196/tags/tina_2D00_ti" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900608.json b/data/json/DLP/900608.json new file mode 100644 index 0000000000000000000000000000000000000000..3a3110aeea91587dd3baa22d89e539b7fa6141d9 --- /dev/null +++ b/data/json/DLP/900608.json @@ -0,0 +1,55 @@ +{ + "ticketNumber" : "900608", + "reporterName" : "Gustavo Belbruno", + "rankPoints" : "35", + "resolutionStatus" : "Resolved", + "ticketName" : "BQ25616: BQ25606 vs BQ25616. I don't found the difference.", + "rankName" : "Prodigy", + "replies" : " 5", + "views" : " 20", + "queryText" : "Part Number: BQ25616 First I want to apologize if this question seems silly. But I was analyzing the datasheets of both components and I don't find a substantial difference between both components. I clearly understand that the BQ25616 is a higher version than the BQ25606, but I can't find the improvement. If someone helps me I would be very grateful. Gustavo", + "partNumber" : " BQ25616", + "allResponseList" : [ { + "contentId" : "3329024", + "userName" : "Kedar Manishankar", + "rankPoints" : "9290", + "rankName" : "Genius", + "date" : "Apr 27, 2020 3:32 PM", + "userId" : "4996925", + "content" : "Hi Gustavo, Below are some of the differences: BQ25616 has optional external OVPFET control to provide an extra layer of protection against input voltage transients, and is controlled by ACDRV pin. This has a fast response of 130ns turn off time. Note this can be disabled if not needed as well. BQ25616 employs HOT/COLD temperature charging profile, while BQ25606 uses JEITA. The BQ25616J is equivalent to BQ25616 but charges according to JEITA vs HOT/COLD Both spins support 4.2V and 4.35V VBATREG, but BQ25616 also supports 4.1V VBATREG, while BQ25606 supports 4.4V VBATREG. BQ25616 has improved lower battery only leakage/discharge current (<10uA) compared to ~57uA battery discharge/leakage current of the BQ25606." + }, { + "contentId" : "3329062", + "userName" : "Gustavo Belbruno", + "rankPoints" : "35", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 3:50 PM", + "userId" : "6333936", + "content" : "Thank you very much. Now, seeing that you understand enough about charging, I take the opportunity to ask you: If my device is in an environment below 0ºC (therefore my battery also), will charging never start?" + }, { + "contentId" : "3329088", + "userName" : "Kedar Manishankar", + "rankPoints" : "9290", + "rankName" : "Genius", + "date" : "Apr 27, 2020 4:03 PM", + "userId" : "4996925", + "content" : "Hi Gustavo, That's correct if you are using the temperature charging profile, as a TS fault would be detected and charging would be suspended. The temperature of the battery is sensed on the TS pin as a voltage, with the use of an external thermistor, so the resultant resistor divider on TS will change the voltage depending on the resistance of the thermistor (changes with temp, use NTC). If you do not want to use the HOT/COLD or JEITA functionality, you can tie the TS pin to a fixed DC voltage that corresponds to the normal temp range. This will always let you charge and essentially ignore temperature, but you lose the HOT/COLD, JEITA functionality. Note that you will have to check with battery vendor if this is a safe charging environment for the battery you use." + }, { + "contentId" : "3329142", + "userName" : "Hong Mao", + "rankPoints" : "4010", + "rankName" : "Expert", + "date" : "Apr 27, 2020 4:30 PM", + "userId" : "4779728", + "content" : "Hi Gustavo: On page 4 of BQ25616 datasheet, there is device comparison table, which compares BQ25606, BQ25616 and BQ25616J. Regards, Hong" + }, { + "contentId" : "3329205", + "userName" : "Gustavo Belbruno", + "rankPoints" : "35", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 5:02 PM", + "userId" : "6333936", + "content" : "Thank you very much Kedar :)" + } ], + "tags" : [ "/support/power-management/f/196/tags/BQ2561", "/support/power-management/f/196/tags/BQ25606", "/support/power-management/f/196/tags/BQ2560", "/support/power-management/f/196/tags/BQ25616" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900611.json b/data/json/DLP/900611.json new file mode 100644 index 0000000000000000000000000000000000000000..ffec7bf265ebe9c3fc62f9b8e611ebc25ccee448 --- /dev/null +++ b/data/json/DLP/900611.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900611", + "reporterName" : "Adam Shepherd", + "rankPoints" : "10", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "mmWave usage around people.", + "rankName" : "Prodigy", + "replies" : " 1", + "views" : " 15", + "queryText" : "Is there any documentation that shows that mmWave is safe to use with people? I'm working on research project for mmWave and I need to have sort of documentation showing that it's safe to use around people.", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3329326", + "userName" : "Kyle Cousino", + "rankPoints" : "19220", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 6:31 PM", + "userId" : "4381542", + "content" : "Adam, Please refer to section 7, \"Regulatory Information\" in the User's Guide for our AWR1642BOOST EVM. /lit/ug/swru508b/swru508b.pdf?ts=1588012115016 Regards, Kyle" + } ], + "tags" : [ "/support/sensors/f/1023/tags/mmWave" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900615.json b/data/json/DLP/900615.json new file mode 100644 index 0000000000000000000000000000000000000000..f4101944ff27d016baaa67454698380f33c670e9 --- /dev/null +++ b/data/json/DLP/900615.json @@ -0,0 +1,15 @@ +{ + "ticketNumber" : "900615", + "reporterName" : "EdWalker", + "rankPoints" : "19510", + "resolutionStatus" : "", + "ticketName" : "TPS650002-Q1: PLease provide FMEA for this device", + "rankName" : "Mastermind", + "replies" : " 0", + "views" : " 9", + "queryText" : "Part Number: TPS650002-Q1 Please provide FMEA for this device.", + "partNumber" : " TPS650002-Q1", + "allResponseList" : [ ], + "tags" : [ "/support/power-management/f/196/tags/TPS650002_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900617.json b/data/json/DLP/900617.json new file mode 100644 index 0000000000000000000000000000000000000000..613629d5001b551a4434074e2c42aee6cf0a8070 --- /dev/null +++ b/data/json/DLP/900617.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900617", + "reporterName" : "EdWalker", + "rankPoints" : "19510", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM53600-Q1: PLease provide FMEA for this device", + "rankName" : "Mastermind", + "replies" : " 1", + "views" : " 8", + "queryText" : "Part Number: LM53600-Q1 Please provide FMEA for this device.", + "partNumber" : " LM53600-Q1", + "allResponseList" : [ { + "contentId" : "3329122", + "userName" : "Frank De Stasi", + "rankPoints" : "25130", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 4:19 PM", + "userId" : "1881345", + "content" : "Hello Please find pin FMEA for LM53600 attached. Thank you LM53600_01_Q1Pin.FMEA.pdf" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM53600_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900618.json b/data/json/DLP/900618.json new file mode 100644 index 0000000000000000000000000000000000000000..7a4ae9986c01992e355a9f4e7738c49559550f30 --- /dev/null +++ b/data/json/DLP/900618.json @@ -0,0 +1,39 @@ +{ + "ticketNumber" : "900618", + "reporterName" : "Jared Becker", + "rankPoints" : "7875", + "resolutionStatus" : "Resolved", + "ticketName" : "Device to compete against MAX20047", + "rankName" : "Expert", + "replies" : " 3", + "views" : " 15", + "queryText" : "Hi Team, Is there a device in our portfolio to compete against the MAX20047? Thanks, Jared", + "partNumber" : "NA", + "allResponseList" : [ { + "contentId" : "3329110", + "userName" : "Jeff F", + "rankPoints" : "88360", + "rankName" : "Guru", + "date" : "Apr 27, 2020 4:12 PM", + "userId" : "8433", + "content" : "Hi Jared, Currently, we do not have such device. We are in the process of spec'ing one. Can you provide more details on the exact application? Thanks. Jeff" + }, { + "contentId" : "3329425", + "userName" : "Jared Becker", + "rankPoints" : "7875", + "rankName" : "Expert", + "date" : "Apr 27, 2020 7:54 PM", + "userId" : "4295103", + "content" : "Hi Jeff, I cannot disclose specific details of the application on the forums. However, the system does have two USB ports that require charging capability. Would two TPS25840-Q1 devices do the trick? Thanks, Jared" + }, { + "contentId" : "3329483", + "userName" : "Jeff F", + "rankPoints" : "88360", + "rankName" : "Guru", + "date" : "Apr 27, 2020 8:50 PM", + "userId" : "8433", + "content" : "Hi Jared, I misread the datasheet. The MAX20047 is not a battery charger. It creates two \"charging ports\" from the auto battery, apparently. So, this would not be a BCP product. I suggest reposting to the product line that supports TPS25840. Regards, Jeff" + } ], + "tags" : [ ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900619.json b/data/json/DLP/900619.json new file mode 100644 index 0000000000000000000000000000000000000000..792b801d3f74f65562480185d4bcfbc9b63e25aa --- /dev/null +++ b/data/json/DLP/900619.json @@ -0,0 +1,15 @@ +{ + "ticketNumber" : "900619", + "reporterName" : "John Wheway", + "rankPoints" : "60", + "resolutionStatus" : "", + "ticketName" : "TPS50601A-SP: Power management forum", + "rankName" : "Prodigy", + "replies" : " 0", + "views" : " 7", + "queryText" : "Part Number: TPS50601A-SP Is the metal lid of the 5962R1022102VSC (HKH package) internally connected to a pin or is it electrically isolated?", + "partNumber" : " TPS50601A-SP", + "allResponseList" : [ ], + "tags" : [ "/support/power-management/f/196/tags/TPS50601A_2D00_SP" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900622.json b/data/json/DLP/900622.json new file mode 100644 index 0000000000000000000000000000000000000000..24083e04683c358266b1c4fa1def3eb9dacc6307 --- /dev/null +++ b/data/json/DLP/900622.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "900622", + "reporterName" : "Dogan Birdal", + "rankPoints" : "130", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "UCC28710: Hello, i'm trying to design buck converter with ucc28710", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 11", + "queryText" : "Part Number: UCC28710 oncompany web site i found a document about ucc28710 controller using as buck converter input 300 VDC output 22 VDC @ 250 mA. İ want to use this configuration but i need 22 VDC @ 1 Ampere İ modeled it on TINA spice analysis program it doesn't work properly. Attached file you can see reference document and TINA analysis model. Please let me know is it posible to get 22 VDC @ 1 ampere output converter.tidt015.pdf", + "partNumber" : " UCC28710", + "allResponseList" : [ { + "contentId" : "3329001", + "userName" : "Dogan Birdal", + "rankPoints" : "130", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 3:24 PM", + "userId" : "4968001", + "content" : "UCC2871x_TINA-TI_Buck_Converter.TSC" + }, { + "contentId" : "3329003", + "userName" : "Dogan Birdal", + "rankPoints" : "130", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 3:24 PM", + "userId" : "4968001", + "content" : "7103.UCC2871x_TINA-TI_Buck_Converter.TSC" + }, { + "contentId" : "3329420", + "userName" : "Mike O'", + "rankPoints" : "27215", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 7:50 PM", + "userId" : "10947", + "content" : "Hello, I do have a question how did you select your buck inductor and at what switching frequency? This device has limitations on maximum duty cycle of less than 57.5% at the maximum switching. The magnetizing inductance should be selected on this based on minimum input and maximum frequency. Also your VS divider is controlling to 0.47V during the freewheeling period. I reviewed the schematic and your VS divider is not setup correctly for 22V VS will control to 4.06V during the freewheeling period. The other thing that could help is just evaluate with a DC input to start until you the simulation running. Regards," + }, { + "contentId" : "3330012", + "userName" : "Dogan Birdal", + "rankPoints" : "130", + "rankName" : "Prodigy", + "date" : "Apr 28, 2020 7:09 AM", + "userId" : "4968001", + "content" : "Hello, As i said i was just usecompany document pdf that is i sent you former mail. In that document it suggest it work at 22 VDC. Can you please send me a reference document to analyze this model." + } ], + "tags" : [ "/support/power-management/f/196/tags/UCC28710" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900627.json b/data/json/DLP/900627.json new file mode 100644 index 0000000000000000000000000000000000000000..bec40945d3dfb396c92f487f101f8494fce1ccce --- /dev/null +++ b/data/json/DLP/900627.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900627", + "reporterName" : "Tsukui Yusuke", + "rankPoints" : "18635", + "resolutionStatus" : "", + "ticketName" : "TPS25924: About Minimum IOL Calculation", + "rankName" : "Guru", + "replies" : " 2", + "views" : " 6", + "queryText" : "Part Number: TPS25924 Hi, Customer wants to calculate the minimum IOL value according to the ILIM setting. The following calculation formula is described in the data sheet. However, the accuracy information for estimating the minimum value is not considered. 1. Could you tell me the calculation method to estimate the minimum IOL? 2. In the calculation formula, IOL = 3.7A when 100kΩ. However, the typical value of electrical characteristics is 3.75A. Which is the correct spec, 3.7A or 3.75A? And Please tell me the meaning of \"Vvin-vout = 1V\". Best regards, Yusuke", + "partNumber" : " TPS25924", + "allResponseList" : [ { + "contentId" : "3329951", + "userName" : "Praveen GD", + "rankPoints" : "9575", + "rankName" : "Genius", + "date" : "Apr 28, 2020 6:10 AM", + "userId" : "4421098", + "content" : "Hi Yusuke, You can consider 3.75 A to be more accurate current limit value for, Rilm = 100 kohms. This is because the values in the Electrical Characteristics table are actual values measured on bench for devices across process, temperature and voltage. The formula is derived theoretically and there can be very slight variation in theory vs practical. Regarding accuracy you can use the graph provided in the datasheet below," + }, { + "contentId" : "3329953", + "userName" : "Praveen GD", + "rankPoints" : "9575", + "rankName" : "Genius", + "date" : "Apr 28, 2020 6:10 AM", + "userId" : "4421098", + "content" : "Hi Yusuke, You can consider 3.75 A to be more accurate current limit value for, Rilm = 100 kohms. This is because the values in the Electrical Characteristics table are actual values measured on bench for devices across process, temperature and voltage. The formula is derived theoretically and there can be very slight variation in theory vs practical. Regarding accuracy you can use the graph provided in the datasheet below," + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS25924" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900629.json b/data/json/DLP/900629.json new file mode 100644 index 0000000000000000000000000000000000000000..3c3454847fbb1c4b0ca41a023ab19aea3138decb --- /dev/null +++ b/data/json/DLP/900629.json @@ -0,0 +1,15 @@ +{ + "ticketNumber" : "900629", + "reporterName" : "Dongbao Zhou", + "rankPoints" : "2360", + "resolutionStatus" : "", + "ticketName" : "UCC2813-0-Q1: extend soft start time", + "rankName" : "Intellectual", + "replies" : " 0", + "views" : " 8", + "queryText" : "Part Number: UCC2813-0-Q1 Hi, Is there any way to increase the soft start time to limit the inrush current? According to the d/s, the soft time maximum is 10ms but it's not enough. Thanks Dongbao", + "partNumber" : " UCC2813-0-Q1", + "allResponseList" : [ ], + "tags" : [ "/support/power-management/f/196/tags/UCC2813_2D00_0_2D00_Q1" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900640.json b/data/json/DLP/900640.json new file mode 100644 index 0000000000000000000000000000000000000000..fb8d8f3a649da635c354719421199f91b68849ef --- /dev/null +++ b/data/json/DLP/900640.json @@ -0,0 +1,47 @@ +{ + "ticketNumber" : "900640", + "reporterName" : "Basso", + "rankPoints" : "30", + "resolutionStatus" : "", + "ticketName" : "LM3410: Flicker with LM3410", + "rankName" : "Prodigy", + "replies" : " 4", + "views" : " 23", + "queryText" : "Part Number: LM3410 We have a product which has been on the market for a few years using the LM3410. We're finding that when the brightness is turned to max (PWM=100%), some customers are reporting flicker. I think it may be due to the ripple on the power supply caused by the heavy drive, but have't been able to solve it with the addition of extra input capacitance (going from 4.7uF to 22uF) or extra output capacitance. We've also tried adding capacitance across the FB pin, to no avail. The next logical place to look seems like the inductor value. running the calculations, it appears that the minimum inductor value is 6.5uH, and we are using 15uH. We are pondering increasing that to 22uH. Perhaps you could you suggest an approach which might help the flicker. Would a larger inductor help? And would it have any significant impact on our efficiency which is running around 85% (measured) right now? The schematic is attached below. We recently added the over-current protection circuitry, although it had no impact on the flicker either way.", + "partNumber" : " LM3410", + "allResponseList" : [ { + "contentId" : "3329274", + "userName" : "Irwin Nederbragt", + "rankPoints" : "20765", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 5:46 PM", + "userId" : "1880111", + "content" : "Hello Basso, Have you been able to reproduce this? What power supply is driving this? Is it possible the input is dropping out? At low input voltage the source needs to be capable of over 1A. What does the output voltage look like at full current? Is it at 9V? Has this problem always existed? Changing the inductor probably won't change this behavior. Best Regards," + }, { + "contentId" : "3329344", + "userName" : "Basso", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 6:45 PM", + "userId" : "4445788", + "content" : "Thanks for the help. Yes, we have occasionally been able to reproduce the flicker (even once during FCC testing), but it seems to come and go. Some units are rock-solid while others are more prone to it. (They are fabricated in the 1000s with pick-and place, so it is more likely to be some slight component variation.) We are driving this circuit with a 5V 2A USB supply or a 8000mAh Li-Ion battery, depending on whether it's plugged in or not. The issue tends to occur more when plugged in, but we've seen it both ways. The output voltage is a solid 9V at full current. We are seeing a great deal of power supply noise (>1.5Vp-p on the 5V supply) on the Vss bus when full on. The power supply is handling the current requirements without dropout. The battery provides better smoothing, since it's a very big capacitor anyway. We've tried C4 at 22uF and C7/C8 have doubled to 10uF each as well. (C7 and C8 are on opposite sides of the PCB to reduce microphonics. We are basically dividing a 10uF in half and having them cancel each other out. Doing so helps the audio noise quite a bit.) I read another post on this forum which suggested adding a 10nF or 100nF capacitor on the FB resistor. We've tried a 100nF (0.1uF), but nothing smaller. Not quite sure where to turn next. Thank you." + }, { + "contentId" : "3329536", + "userName" : "Irwin Nederbragt", + "rankPoints" : "20765", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 9:34 PM", + "userId" : "1880111", + "content" : "Hello Basso, As you know it will be very hard to figure out what's going on unless you can reproduce it and see what it is doing. I'm not sure what you've tried but you could try reducing the current sense resistor(s) to drive more current to see if it malfunctions more frequently. Or if some other operating condition such as higher temperature makes if more frequent. As for the noise on the input, it it noise, current ripple or? I'm not sure how you are measuring this. If you are using a scope probe with it's ground try looking at the ground connection (probe where the ground is connected) to see if it is real or being picked up in the oscilloscope loop. Best Regards," + }, { + "contentId" : "3329759", + "userName" : "Basso", + "rankPoints" : "30", + "rankName" : "Prodigy", + "date" : "Apr 28, 2020 2:12 AM", + "userId" : "4445788", + "content" : "Thanks, Irwin. I agree that it's difficult to isolate without reproducing it reliably. It may be that our circuit is getting into a state where the PWM varies due to effects on Vss by the LM3410, causing a feedback loop. In other words, Vss noise causes our microprocessor to adjust the PWM to less than 100% (full on), which causes Vss noise. (Ground is measuring dead-flat zero, BTW, so it isn't a scope loop.) I've taken a scope trace of the 2 kHz PWM being sent from our microprocessor to the LM3410 at roughly 66% duty cycle, and the subsequent impact on Vss. The yellow trace is the PWM signal. The blue trace is Vss. Note that scales for the traces are different (Vss is shown at 1V per division to illustrate the impact better). Vss is varying about 1Vp-p. In this case, the \"noise\" is effectively ringing and power supply droop from what I can tell. Thanks for the help." + } ], + "tags" : [ "/support/power-management/f/196/tags/LM3410" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900641.json b/data/json/DLP/900641.json new file mode 100644 index 0000000000000000000000000000000000000000..84d13188a4bef7512a9125333ce850fb4ad12002 --- /dev/null +++ b/data/json/DLP/900641.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900641", + "reporterName" : "Feryanlie Feryanlie", + "rankPoints" : "20", + "resolutionStatus" : "", + "ticketName" : "LM338: IC is broken after continuous 500mA output for 2 hours", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 7", + "queryText" : "Part Number: LM338 Hi, I'm building a simple battery charger for my personal hobby project. The circuit is based on the reference design from the datasheet with input voltage of 15V (initially had been 14V but I changed it afterwards) and output voltage of 13.5V as seen below. My intention is to charge a small car battery with continuous charge of 5A. I've put the IC with a beefy heatsink and a 120mm cooling fan to mitigate power loss. After building the circuit, it was working fine. The output was stable at 13.5V. Then, I tested it to charge an old motorcycle 12V battery with 7Ah capacity and it drew 0.5A current, although there was some fluctuation, between 0.5A up to 1.1A. I let it charge for about 2 hours to see if it really worked. After 2 hours of charge, I turned it off and let it rest for a few hours. After that, when I tried to test it again with better load, the output just stuck at 14.7V. The trimpot doesn't do anything to set the output voltage. Also, when I checked the voltage between the output and the adjust pin, it was 0.5V, way below the intended 1.25V as the datasheet says. I assume that the IC is broken now. What I don't understand how the IC is broken, since the whole 2 hour test, the IC only get a bit warm. Could it be that I get some counterfeit product?", + "partNumber" : " LM338", + "allResponseList" : [ { + "contentId" : "3329192", + "userName" : "Kyle Van Renterghem", + "rankPoints" : "4860", + "rankName" : "Expert", + "date" : "Apr 27, 2020 4:59 PM", + "userId" : "1091764", + "content" : "Hi Feryanlie, It seems strange that this 5A part would have an issue with only 0.5-1.1A. Also did you determine why the current was fluctuating? If anything I'd expect it to start high (when the battery is low on charge) and then decrease as the battery voltage increases. A fluctuating current makes me think that either the LDO was unstable or that the input supply was unable to provide enough current and the input supply was collapsing and recovering . What is providing the 15V input voltage? Is it possible that the input voltage fell momentarily causing Vout>Vin+0.3V? If so this would violate the abs max voltage listed in the datasheet and could damage the LDO resulting in the behavior you're seeing." + }, { + "contentId" : "3329954", + "userName" : "Feryanlie Feryanlie", + "rankPoints" : "20", + "rankName" : "Prodigy", + "date" : "Apr 28, 2020 6:11 AM", + "userId" : "5026796", + "content" : "Hi Kyle, thanks for responding. The 15V input voltage currently is from a bench power supply. It's set to max 2A and 15V. Later, after this test is done, I will use rectified DC from a transformer. Kyle Van Renterghem Also did you determine why the current was fluctuating? I think is caused by faulty battery. I tried charge the battery directly from the bench power supply, and it was also fluctuating also. It would randomly charge at 200mA to up to 1A. Kyle Van Renterghem Is it possible that the input voltage fell momentarily causing Vout>Vin+0.3V? Now you mention it, that is pretty interesting. I haven't put any attention on it when reading the datasheet, but shouldn't putting a blocking Schottky diode would be enough? O yes, I forgot to upload my schematic. Here is my schematic." + } ], + "tags" : [ "/support/power-management/f/196/tags/LM338" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900642.json b/data/json/DLP/900642.json new file mode 100644 index 0000000000000000000000000000000000000000..3ef8e0de857c334d431fc141a00858e81240f2aa --- /dev/null +++ b/data/json/DLP/900642.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900642", + "reporterName" : "Adam Daluga", + "rankPoints" : "1205", + "resolutionStatus" : "TI Thinks Resolved", + "ticketName" : "LM3478: Webench Flyback Simulation", + "rankName" : "Intellectual", + "replies" : " 1", + "views" : " 5", + "queryText" : "Part Number: LM3478 Hi, I’m trying to simulate the LM3478 in webench as a flyback converter. I can only seem to configure it as a boost converter. Can you tell me how to simulate the flyback functionality of it? I am reviewing a design and would like to confirm its operation. Thanks, Adam", + "partNumber" : " LM3478", + "allResponseList" : [ { + "contentId" : "3329133", + "userName" : "Richard Fu22", + "rankPoints" : "2925", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 4:25 PM", + "userId" : "5003147", + "content" : "Hi Adam, You can build a model of the flyback converter using the LM3478 PSPICE transient model. In order to implement a coupled inductor, I would recommend putting the magnetizing inductance in parallel with a transformer that has the desired turn ratio. You can also refer to this application note to double check: /lit/an/snva761a/snva761a.pdf?ts=1588004708306 Thanks, Richard" + } ], + "tags" : [ "/support/power-management/f/196/tags/LM3478" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900658.json b/data/json/DLP/900658.json new file mode 100644 index 0000000000000000000000000000000000000000..0275950289c6981b7df0921195a874d159abc9fb --- /dev/null +++ b/data/json/DLP/900658.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900658", + "reporterName" : "Jorgen Dahlback", + "rankPoints" : "110", + "resolutionStatus" : "Resolved", + "ticketName" : "TPS62823: Short circuit between VIN and VSW", + "rankName" : "Prodigy", + "replies" : " 2", + "views" : " 10", + "queryText" : "Part Number: TPS62823 Hi, We're having some issues with a design with the TPS62823. Before the very first power on of a board, impedances seem to be ok, but after the first power on, a short has developed between the VIN and VSW pins of the TPS62823. I've removed the package from the board, and the short is internal to the IC. This is our schematic: Input voltage is 5.1V max. I believe the routing is fairly close to the recommendations as well: Any ideas how this failure can occur? Best regards, Jørgen", + "partNumber" : " TPS62823", + "allResponseList" : [ { + "contentId" : "3329182", + "userName" : "Jorgen Dahlback", + "rankPoints" : "110", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 4:53 PM", + "userId" : "5936136", + "content" : "Just to add one detail: The EN pin is sequenced by an LM3881, and is pulled up to 5V with a 100k resistor. Jørgen" + }, { + "contentId" : "3329386", + "userName" : "Jorgen Dahlback", + "rankPoints" : "110", + "rankName" : "Prodigy", + "date" : "Apr 27, 2020 7:23 PM", + "userId" : "5936136", + "content" : "Hi again, Never mind! It turned out to be an assembly issue. The inductor was rotated 90 degrees, and shorted across the component footprint. Best regards, Jørgen" + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS62823" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900659.json b/data/json/DLP/900659.json new file mode 100644 index 0000000000000000000000000000000000000000..dfd04ba0fc9fb2e17233281420aa82658457e65b --- /dev/null +++ b/data/json/DLP/900659.json @@ -0,0 +1,31 @@ +{ + "ticketNumber" : "900659", + "reporterName" : "gilles MICHEL40", + "rankPoints" : "380", + "resolutionStatus" : "", + "ticketName" : "BQ40Z50-R1: Faulty current information from BQ40Z50", + "rankName" : "Intellectual", + "replies" : " 2", + "views" : " 12", + "queryText" : "Part Number: BQ40Z50-R1 Hi guys, I made a drawing of the strange case we get on a BQ40Z50R1 + BQ24610 design. We have 2 version of MotherBoard using 2 types of power architecture to generate 3v3, 12v and 5v One of them (our new motherboard design) have a strange behaviour when reading data from BQ40Z50R1. Charging and discharging the battery works well, system is correctly powered from battery but the data read from BQ40Z50 are not relevant Using EV2400, Current displayed = 0 when battery is discharging (remenber: battery powered correctly the system) Current displayed = 20mA when battery is charging. (remenber battery is correctly charged after 2 hours) and others parameters are also not relevant : For example : 'time to full' is very long (because current charge is 20mA) But in real , current charge is 1.6A I can provide schematics of the 3 systems Any idea to help ? Regards Gilles", + "partNumber" : " BQ40Z50-R1", + "allResponseList" : [ { + "contentId" : "3329218", + "userName" : "Andy Liu (BMS)", + "rankPoints" : "42410", + "rankName" : "Mastermind", + "date" : "Apr 27, 2020 5:11 PM", + "userId" : "1864278", + "content" : "How many units with this issue have you seen? Does it happen to only one unit? Andy" + }, { + "contentId" : "3329396", + "userName" : "gilles MICHEL40", + "rankPoints" : "380", + "rankName" : "Intellectual", + "date" : "Apr 27, 2020 7:29 PM", + "userId" : "5350393", + "content" : "Hi Andy, We have manufacture a set of 100 Battery pack + BMS. and 100 MotherBoards All of them have the same problem. Gilles" + } ], + "tags" : [ "/support/power-management/f/196/tags/bq40z50", "/support/power-management/f/196/tags/bq40z50_2D00_r1", "/support/power-management/f/196/tags/bq24610", "/support/power-management/f/196/tags/EV2400" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/json/DLP/900663.json b/data/json/DLP/900663.json new file mode 100644 index 0000000000000000000000000000000000000000..65b6d197e7152d86303dbc3e73f0465a21318df9 --- /dev/null +++ b/data/json/DLP/900663.json @@ -0,0 +1,23 @@ +{ + "ticketNumber" : "900663", + "reporterName" : "Keith Keller", + "rankPoints" : "4610", + "resolutionStatus" : "", + "ticketName" : "TPS65400: Radiated EMI Performance", + "rankName" : "Expert", + "replies" : " 1", + "views" : " 9", + "queryText" : "Part Number: TPS65400 Hello, We have a new design we're working on with the TPS65400. The output of the design runs for a significant distance. From our first radiated test results we’re getting significant fails at certain frequencies. Could we please share our schematic and layout with you to better understand the results and how we can improve performance? Thank you, Keith", + "partNumber" : " TPS65400", + "allResponseList" : [ { + "contentId" : "3329686", + "userName" : "Zhao Ma", + "rankPoints" : "7070", + "rankName" : "Expert", + "date" : "Apr 28, 2020 12:50 AM", + "userId" : "4727719", + "content" : "Hi, Keith Sure, please share the schematic and layout." + } ], + "tags" : [ "/support/power-management/f/196/tags/TPS65400" ], + "fourmType" : "TI" +} \ No newline at end of file diff --git a/data/text/DLP1/899371 b/data/text/DLP1/899371 new file mode 100644 index 0000000000000000000000000000000000000000..368cbb8dadd3ae442b42893e0418e7f1f64e5f92 --- /dev/null +++ b/data/text/DLP1/899371 @@ -0,0 +1,6 @@ +BQ24707A: IFAULT not tripping when conditions met + +Part Number: BQ24707A My Ifault pin is pulled up through a 100k resistor to 3.3V. When I apply a dummy load of 3A from ACN to GND, well above the 128mA input current limit of the 0x3f register (by setting 0x3f to 0x0100. nothing causes a trip. is there something wrong with my setyup? here are my registers in format: register: High byte, low byte 0x12: 0x19, 0x04 0x14: 0x08, 0x00 0x15: 0x32, 0x00 0x3f: 0x01, 0x00 because of these register values, acoc should be enabled. I draw 1amp of current, way above 2x the limit of acoc, and the ifault doesn't trip. I've also noticed that the outside pin is exactly correct when charge current is chosen (200mV @ 1A), but the iout pin is wildly inaccurate when input current is chosen (75mV @ 1A charging). this doesnt make sense because the input current is the charging current plus what it takes to run the ic. I've verified we are using a 10m resistor between acn and acp. + +Hi Alex, Thanks for the information! To keep the forum organized, I have replied to your original thread and will continue the discussion there: /support/power-management/f/196/t/897804 Best regards, Angelo + diff --git a/data/text/DLP1/899375 b/data/text/DLP1/899375 new file mode 100644 index 0000000000000000000000000000000000000000..ae536b44a5f48c429831d13b62c8eb06fb824dbd --- /dev/null +++ b/data/text/DLP1/899375 @@ -0,0 +1,8 @@ +BQ25713: Cheapest or simplest 3s LiPo boost charger and balancer? + +Part Number: BQ25713 Hi, I'm thinking of using the BQ25713 to charge a 3s Lipo pack from USB. My circuit involves a microcontroller that will control the BQ25713 using I2C. I'm wondering what's the least expensive way to add cell balancing logic? I saw the BQ76920, but was wondering if there's anything simpler or less expensive. Or, is there another boost lipo charge chip that includes balancing? System load will be up to 13 watts. Thanks, Josh + +Sorry, we don't have a battery charger integrated with cell balancer right now. + +Ok, thanks. J + diff --git a/data/text/DLP1/899379 b/data/text/DLP1/899379 new file mode 100644 index 0000000000000000000000000000000000000000..e6ee47dd7fc71316c09c45f36ef9ec421b49420b --- /dev/null +++ b/data/text/DLP1/899379 @@ -0,0 +1,8 @@ +BQ76930EVM: Evaluation software fails to detect connected device + +Part Number: BQ76930EVM Just realised the image I posted shows the cable connected to SMBus... I posted the wrong image, the correct one should show it connected to I2C. Hi I'm hitting a problem when I try to open the evaluation software. It throws up an error message which reads 'Unable to read ADC Gain and Offset from connected device. Please ensure a powered bq789X0 is connected to the I2C communications lines on the communication adapter...etc, etc'. What is particularly frustrating is that I have had this working cleanly in the past - I have just resurrected this project and have now hit this problem so it's quite likely it's caused by something I've got configured wrong. I'm powering the board using an external power supply, providing around 30V and the board is connected (via I2C) to an EV2400. I've attached a picture of the board showing its configuration - ignore the cable in the shot, it's for connecting my battery but is currently disconnected. Any ideas on what might be wrong here? Cheers, Mike + +Hi Mike, The LED is lit so the board has power, You are using an EV2400 so you don't want the pull up shunts, they are removed. As you note, in the picture the SMBus connector is used, move to the I2C. Also be sure to move the EV2400 end to the I2C connector. Be sure to boot the board with the pushbutton left of the PACK- terminal in the picture. Check that REGOUT has gone high, then you may need to check continuity on the I2C lines from the EV2400, The connector pins or the cable are the most likely to open, Inspect at various points with a scope while trying the read. You might unplug the EV2400 & restart the software also. Be sure there is no another instance of the software or a BQStudio running which has claimed the interface. + +Hi WM5295 Thanks for providing your checklist. I worked through it and it is now working once again. I had mistakenly been pressing the button labelled Display and not the Boot button. Cheers, Mike + diff --git a/data/text/DLP1/899385 b/data/text/DLP1/899385 new file mode 100644 index 0000000000000000000000000000000000000000..b4085d9e724261a91f96bf578c32ebbe1af92289 --- /dev/null +++ b/data/text/DLP1/899385 @@ -0,0 +1,10 @@ +TPS55288: TPS55288 Standalone operation + +Part Number: TPS55288 Hi TI, TPS55288 can be used without I2C Control? + +Dear Sir, You can choose TPS552882 non-I2C version. + +Dear chen, TPS552882 can't be searched on website. Has it not been released yet? + +Yes, this part hasn't been published yet. You can contact with the product line marketing for the samples. + diff --git a/data/text/DLP1/899389 b/data/text/DLP1/899389 new file mode 100644 index 0000000000000000000000000000000000000000..2f310c2069976c9911b5504dbf983c750eeabef8 --- /dev/null +++ b/data/text/DLP1/899389 @@ -0,0 +1,6 @@ +LM5017: Can UVLO pin connect to GND while measuring the shutdown current ? + +Part Number: LM5017 The datasheet say " When the UVLO pin voltage is below 0.66 V, the regulator is in a low current shutdown mode ". So can we connect the UVLO to GND for measuring the shutdown current ? + +Hi, Yes, pls take account of bias current by resistor connected to VIN rail. B R Andy + diff --git a/data/text/DLP1/899390 b/data/text/DLP1/899390 new file mode 100644 index 0000000000000000000000000000000000000000..602ead9363449dd7d3497932ed096dccf5889596 --- /dev/null +++ b/data/text/DLP1/899390 @@ -0,0 +1,6 @@ +TPS1HB08-Q1: 24V Operation + +Part Number: TPS1HB08-Q1 When my customer use TPS1HB08A-Q1 in 24V VBB operation,we found following description in datasheet. VBB Extended supply voltage(2) 3 - 28 V (2)Device will function within extended operating range, however some parametric values might not apply Do you have any parameter list at 24V operation. regards, + +Hello Kura-san, Above the 18V nominal operating voltage if a short-to-ground fault occurs the device is not guaranteed to survive. Additionally the only parameter that is specified above 18V is the on-resistance. Other parameters are only specified VBB = 6 V to 18 V. + diff --git a/data/text/DLP1/899395 b/data/text/DLP1/899395 new file mode 100644 index 0000000000000000000000000000000000000000..5ef00d2720c402614ad8f845957fa1e39d072891 --- /dev/null +++ b/data/text/DLP1/899395 @@ -0,0 +1,8 @@ +LM134: Temperature stabilized current source + +Part Number: LM134 Hi sir, I'm looking for a constant current source with the following properties: - output current ideally in the 50mA range, but 10mA could work too - the precision doesn't matter so much (100ppm is plenty), but it's more important for the current to be stable over temperature - operational temperature up to 125C The application is in-circuit temperature sensing by measuring changes to the resistance of copper. The current source drives some long, intentional copper traces and we measure the voltage across the long trace. I'm looking for something that can deliver a relatively stable current over a wide temperature range. The LM134 has an output current drift of 0.3%/C, or equivalently 3000ppm/C. I'm interested in something that's closer to the 3 or 30ppm/C range, so that the total fluctuation between 25C and 125C is ~3000ppm. Thank u. Regards, + +Are you open to using a discrete solution? The LM4051-N is a high precision voltage reference that can be configured to be a current source as per fig 29 on the DS. This can achieve a higher precision than the LM134. The total temperature fluctuation of the LM4051-N is around 3300ppm. + +Great helpful, thank u so much. + diff --git a/data/text/DLP1/899399 b/data/text/DLP1/899399 new file mode 100644 index 0000000000000000000000000000000000000000..9968aad4a5f13cc8c253f1cfb7df30916d5369c8 --- /dev/null +++ b/data/text/DLP1/899399 @@ -0,0 +1,6 @@ +TPS23754: Wrong PoE classification TPS23754 with 802.3at GLOBTEK GT-96300-3656-T3-AP PoE injector - resolved TPS23754: Wrong PoE classification TPS23754 with 802.3at GLOBTEK GT-96300-3656-T3-AP PoE injector//support/power-management/f/196/t/784349 + +Part Number: TPS23754 I'm trying to reply to the posting: TPS23754: Wrong PoE classification TPS23754 with 802.3at GLOBTEK GT-96300-3656-T3-AP PoE injector//support/power-management/f/196/t/784349 GlobTek was made aware of this issue and the product GLOBTEK GT-96300-3656-T3-AP PoE injector, the only Level VI Efficient POE injector on the market, has been updated to fix this issue of improper handshake and class 2 communication. All new production incorporates this fix. Sorry for the trouble! Thanks! + +D.R. , Thank you very much for the update! I am glad to hear things got fixed. Can you mark this thread as resolved? Thank you! Regards, Michael Pahl + diff --git a/data/text/DLP1/899409 b/data/text/DLP1/899409 new file mode 100644 index 0000000000000000000000000000000000000000..f20b0e3f651b34a880b77645a089f84acfb95ff4 --- /dev/null +++ b/data/text/DLP1/899409 @@ -0,0 +1,6 @@ +BQ27426: BQ27426 application circuit confirmation + +Part Number: BQ27426 Hi there, I have a question about the application circuit of BQ27426. According to the datasheet, the charging current is opposite to the battery discharging current, My question is : When the charging circuit works, does the reverse voltage drop on the 10 mΩ sense resistor(SRN-SRP) affect the chip? Subsequent question is: In the case of charging, can the IC also complete the charging current detection. Datasheet recommended applications are as follows, Thanks for your help. + +See my comments below. When the charging circuit works, does the reverse voltage drop on the 10 mΩ sense resistor(SRN-SRP) affect the chip? [Andy] No. The current flows in different directions during charge and discharge. In the case of charging, can the IC also complete the charging current detection? [Andy] What do you mean by "charging current detection". The current is always monitored by the gauge. + diff --git a/data/text/DLP1/899418 b/data/text/DLP1/899418 new file mode 100644 index 0000000000000000000000000000000000000000..1e8491386b94d49e810d0eccaa87fe71e99fb6fb --- /dev/null +++ b/data/text/DLP1/899418 @@ -0,0 +1,6 @@ +BQ24780S: The selection of RC on ACDEC/ACDRV pin + +Part Number: BQ24780S Hi team: I want to know the specific function of C1 C2，what’s the effect if I remove them? What are the requirements for their (C1 C2 R3 R4 )selection of value? Thanks! Alice + +Hi Alice, C1 and C2 are used to control the turn-on speed of Q1 and Q2. If the turn-on speed is too fast, there is a large inrush current into the system capacitors and this could cause the adapter voltage to crash, which would be sensed as a disconnect at ACDET pin. If the turn-on speed is too slow, there is more heat generated and there is a danger of damaging the Q1 and Q2 FETs. Since different adapters have different capabilities and different FETs have different safe operating curves, the optimal turn-on speed is system dependent, but these capacitor values form a good balance. I would say that you might reasonably half or double them, but going outside that range has a good chance of causing one of the problems mentioned above. The R3 and R4 serve a different purpose. They limit current to protect the CMSRC and ACDRV pins during plugin transients. These values should not be modified. Regards, Steve + diff --git a/data/text/DLP1/899421 b/data/text/DLP1/899421 new file mode 100644 index 0000000000000000000000000000000000000000..8b9cb9a5614e4047e06e9810b941589cc5a1dd2a --- /dev/null +++ b/data/text/DLP1/899421 @@ -0,0 +1,6 @@ +TPS546D24A: A version + +Part Number: TPS546D24A Hi Team, what is the difference between TPS546D24 and TPS546D24A ? exactly the same? + +Tommy Tzeng No, the TPS546D24 and the TPS546D24A are not exactly the same. They are pin to pin compatible, use the same power path components and the same control loop architecture. They also share most of the same PMBus commands along with using the same data format and structure for all common commands, but there are a few minor differences. The TPS546D24A is the newer part and should be selected for new designs. What is the TPS546D24A? The TPS546D24A is an improved and updated version of the TPS546D24. What has remained the same? The TPS546D24A is pin to pin and layout compatible with the TPS546D24 All pin functions on the TPS546D24A remain the same as they were on the TPS546D24 All pin interfaces on the TPS546D24A remain the same as they were on the TPS546D24 All pin programmable functions on the TPS546D24A use the same pins for programming as the TPS546D24 All resistorless programming options (Short / Float) on the TPS546D24A program the same PMBus values as the TPS546D24 The TPS546D24A is PMBus Compatible with the TPS546D24 All PMBus Commands supported by the TPS546D24 are supported by the TPS546D24A What needs to change? Non Zero Resistors from the 4 Pin Programming pins (MSEL1, MSEL2, VSEL, and ADRSEL) to BP1V5 or AGND will need to use updated values per the TPS546D24A programming table. No non-zero values remain unchanged. Readback verification of IC_DEVICE_ID and IC_DEVICE_REV over PMBus will need to be updated to include the correct readback values for the TPS546D24A Device IC_DEVICE_ID IC_DEVICE_REV TPS546D24 54 49 54 6D 24 00 20 00 TPS546D24A 54 49 54 6D 24 41 40 00 TPS546B24A 54 49 54 6B 24 41 40 00 TPS546A24A 54 49 54 6A 24 41 40 00 With the following exceptions, every pin programmable option available on the TPS546D24 is available as a pin programmable option on the TPS546D24A, though some single-resistor options available on the TPS546D24 require both a resistor to ground and a resistor to BP1V5 on the TPS546D24A. PMBus Addresses 32d – 47d with Phase shift 0 degrees and Sync Config Auto-detect are not available for Pin Programming on the TPS546D24A. List of Changes and Improvements Pin Strap Improvement. Pin Strap Functionality rated over full temp range (-40 to 125C) and product life. Requires BOM change (See Above) Remap Pin Detection All PMBus functions are programed by the same pin (MSEL1, MSEL2, VSEL, and ADRSEL) All PMBus options from TPS546D24 are mapped to TPS546D24A Except: SYNC Auto-detect w/ PMBus Address 32d – 47d Some TPS546D24 Single Resistor options require 2 resistors in TPS546D24A. PGOOD release on VOUT_OV_WARN/VOUT_UV_WARN Correctly release PGOOD (allow to rise high) following an output voltage OV or UV warning that does not trigger an OV or UV fault without issuing a CLEAR_FAULTS command. Improved Robustness. Improved protection from improper PMBus commands. Prevent Rail shut-down due to BCX_CLK short to ground Improved cold-temperature, high frequency operation. Eliminate possibility that second Warning or second Fault in quick succession is not reported by PMBus STATUS. EN/UVLO leak current improved to prevent “Drift-on” with floating EN/UVLO pin. Add PMBus Command Enabled Internal Pull-up for RESET_B to VDD5 to eliminate need for external pull-up resistor. Start Switching at end of TON_RISE if VOUT greater than VOUT_COMMAND to discharge > 100% pre-biased outputs. Maintain Free Running Oscillator Frequency when SYNC_CONFIG changed to SYNC_OUT while output is disabled. Block Setting PMBus SLAVE ADDRESS command programming to Addresses: 0x8, 0x37, 0x0C, 0x61 Eliminate VOUT OV/UV WARN LIMIT “Walking” on repeated STORE/RESTORE cycles Eliminate need to READ individual telemetry values before using READ_ALL Add “Ignore Fault on Margin” support in OPERAITON command Add MFR_ID command support 3-byte User Programmed ID value stored in NVM. Add READ_VIN and Enable READ_VIN bytes of READ_ALL, TELEMETRY_CONFIG Add PVIN telemetry. Add STATUS_PHASE command support Identifies which slave within a stacked device is reporting an Over Current or Over Temperature warning or fault condition. Add VIN_OV_FAULT_LIMIT and VIN_UV_WARN_LIMIT command support Warn of low PVIN and stop switching in case of high PVIN Allow READ_VOUT to report VOSNS of Slave device in Stack Makes VOSNS telemetry of slave devices in multi-phase stacks available for telemetry via the READ_VOUT function. Force 20C OT_FAULT hysteresis when OT_WARN_LIMIT > OT_FAULT_LIMIT + diff --git a/data/text/DLP1/899423 b/data/text/DLP1/899423 new file mode 100644 index 0000000000000000000000000000000000000000..8f7cd4fee3cc0147750db5448bd61392a026f5cd --- /dev/null +++ b/data/text/DLP1/899423 @@ -0,0 +1,12 @@ +BQ25713: I2C - debug lack of answer? + +Part Number: BQ25713 Hi, Any ideas whats going wrong here trying to get I2C communication working with the charger IC? suggestions? Using the EVM board, but not the usb-i2c connector or your software (do not have them). so our microcontroller and our code. the trace is taken at the EVM jumper for SDA and SCL. EVM has power. On the right of the below trace i expect manuf ID 0x40, not 0xFF (its reading 2 bytes for no good reason). Same result for ChargeOption0 To go through the test from left to right The board address is 6B ->D6,D7. register 0x14 does not exist to test for NACK . register 0x2E should return manufacture id 0x40. register 0x00 ChargeOption0 should default to 0xE60E. thanks in advance + +Hi, Brad, Could you capture another waveform usingcompany connector andcompany software? so we can compare both waveforms and find the differences. + +As written in the original post I do not have them (i.e. no EV2400). By the time I realised the EVM had been ordered without it, we didnt want to wait for Covid time frame ordering so wrote the I2C code (TI could replicate reasonably easily with the 2 registers shown in the main post) + +Hi, Brad, I am not a digital engineer. I checked the pulse train when reading 0x2E, it returns 0x40 correctly. I can see there is another Start signal in the second byte. The pulses are "S 1101 0110 A 0010 1110 A S 1101 0111 A 0100 0000 1 P" + +Tiger Zhou I am not a digital engineer me neither :) thankyou for picking that up. The missing start signal was required from master. now seeing the expected manufacturer id 0x40 and device 0x88 + diff --git a/data/text/DLP1/899424 b/data/text/DLP1/899424 new file mode 100644 index 0000000000000000000000000000000000000000..0f918fe1e27fe30db0ecc7e181813e7feebeb54f --- /dev/null +++ b/data/text/DLP1/899424 @@ -0,0 +1,12 @@ +LM3880: Shutdown current + +Part Number: LM3880 What is the shutdown current of LM3880? + +Hi Could you please be more specific about shutdown current? Regards Yihe + +Hi Yihe, The total current consumed by LM3880 while powered, but when the enable pin is unasserted. We are trying to optimise battery life. Kind regards, + +Hi If you try to saving the battery life, the pull up souce of the flag output shall not be the same source to power LM3880. otherwise, the current consumption would be much higher than EN pin is asserted case. if the EN is de-asserted and flags have pull up from other source, the total current is very close to the operating quiescent case. Regards Yihe + +Thanks Yihe + diff --git a/data/text/DLP1/899430 b/data/text/DLP1/899430 new file mode 100644 index 0000000000000000000000000000000000000000..32406c7dfd3e29c406992ca0f969310a841eaa52 --- /dev/null +++ b/data/text/DLP1/899430 @@ -0,0 +1,6 @@ +TPS56637: Question for TPS56637 maximum output voltage + +Part Number: TPS56637 Hi Experts, From the datasheet of TPS56637, we mentioned the recommended maximum output voltage is 13V as below. We want to know what's the limitation behind this specification? Can you use this device to output 16V from 18V input? If we used the Toff_min to calculate the Dmax, it is around 85% maximum duty cycle: Dmax=Fsw*(1/Fsw-Toff_min) Thanks. + +Hi Jacky, it can't support 16V/18V application since the output voltage is limited by some internal compensation net circuits, if over 13V, unstable will happen. not related to the max duty. Yuchang + diff --git a/data/text/DLP1/899449 b/data/text/DLP1/899449 new file mode 100644 index 0000000000000000000000000000000000000000..049c2a1d0731592519e8952e3afe582e59e0debf --- /dev/null +++ b/data/text/DLP1/899449 @@ -0,0 +1,6 @@ +3A 27V Synchronous Buck Converter + +Dear team, Could you please help to find the most suitable solution for below requirements? Thank you. Kane + +Hi Kane, TPS54302, 4.5V-28V, 3A, SOT23-6 package should be the device you want. Thanks. + diff --git a/data/text/DLP1/899457 b/data/text/DLP1/899457 new file mode 100644 index 0000000000000000000000000000000000000000..07d082875cdb623d83895ea0deaa99ce3fc7a8a2 --- /dev/null +++ b/data/text/DLP1/899457 @@ -0,0 +1,16 @@ +TPS54302: Soft Start Time & Discharge Function + +Part Number: TPS54302 Hello team, I got a question from the customer. Could you please tell me the min/max spec for soft-start if your team has this info? Also, I would like to confirm the discharge time. This device doesn't have discharge function and discharge time would change depending on load. Is my understanding correct? Thank you for your support. Best Regards, Kazuki Kitajima + +Hi Kazuki, The soft start time variation as below. This part has no discharge function, so the discharge time depends on the output capacitance and the loading. Temperature Min Avg Max 25 4.16 4.78 5.47 85 4.47 5.03 5.86 125 4.66 5.31 6.30 -40 3.90 4.63 5.39 150 4.90 5.54 6.47 + +Hi Ryan-san, Thank you for providing the SS time. Is this measurement value or sim value? Best Regards, Kazuki Kitajima + +Hi Kazuki, Those are ATE char data with three lots silicon. + +Ryan-san, Understood. Thank you for your support! Best Regards, Kazuki Kitajima + +Hi Ryan-san, Sorry, I thought this case is closed, but could you tell me 3 things below which are additional questions from the customer? 1: ATE Input voltage setting: voltage level and start uptime(I assume SS time isn't affected by the Input voltage) 2: Definition of SS time: e.g. start point is 0V to the endpoint is the output voltage 3: SS time variation perspective: The temperature is the most dominant spec for SS? Best Regards, Kazuki Kitajima + +Hi Kazuki-san, 1. ATE data considered the VIN of 4.5V to 28V, if they input was fixed, the variation should be narrower than the above table range. 2. This is ATE data, not bench data. On bench test, some buck defines 0%-90% of Vo, some buck defines 0%-100% of Vo. 3. Yes, temperature is the main factor the variation. + diff --git a/data/text/DLP1/899463 b/data/text/DLP1/899463 new file mode 100644 index 0000000000000000000000000000000000000000..d82b983903240f6bcd2aa005c1ada05083d4d73c --- /dev/null +++ b/data/text/DLP1/899463 @@ -0,0 +1,14 @@ +IWR6843: For IWR6843 ISK z-axis data + +Part Number: IWR6843 Dear TechnicalSupport I use IWR6843 ISK(ES2.0) following FW was burned. C:\ti\mmwave_industrial_toolbox_4_2_1\labs\people_counting\68xx_3D_people_counting\prebuilt_binaries\3D_people_count_68xx_demo.bin Install the radar at a height of 2.5m as shown below. I walked a distance of 15m from right below in the y-axis direction. The result is that the point cloud looks above the person's head. Is there any correction applied to the z-axis direction? Also, in 3D People Counting incompany Resource Explorer The name of the folder is ODS. But, In the user guide, the supported device is written as ISK. Is it correct that I can use it for both ODS and ISK? I plan to use the below FW in the future, but I would like to check the validity of the data I have acquired. C:\ti\mmwave_industrial_toolbox_4_2_1\labs\long_range_people_detection\68xx_long_range_people_det\prebuilt_binaries\long_range_people_det_68xx_demo.bin Best Regards + +Hi User, This lab supports both ISK and ODS. There is point cloud correction being done - the sensor is given an azimuth tilt (with respect to wall behind it) and an elevation tilt (with respect to the ground). By default, the sensor is assumed to be downtilted 15 degrees, so point cloud is shift 15 degrees up. If the device is not tilted down in your test, points should appear above the person, and get farther above the person as the person gets farther from the device. You can change the downtilt setting in the gui - see the sensor position arguments on the bottom left panel. Regards, Justin + +Dear Justin Thank you for your reply. To correct point cloud is in GUI software isn't it? The data for this experiment is a direct TLV packet extraction and analysis from UART. Actually, the radar device was tilted by 10 ° and measured, so as you say, the point cloud shifts downward when corrected. However, considering that my height is 1.7m, it still seems that the point cloud appears above the head. Best Regards + +Hi, Actually, the point cloud correction happens on the device before the tracker is run. This is so that the tracker can filter points based on their location. However, you can simply reverse the transform on your collected data set. Since the device is down-tilted 10 degrees and the setting is 15 degrees, try removing 5 degrees from each point's elevation value. There may also be some ghost points, you can try removing points from the set with low SNR. Regards, Justin + +Dear Justin Thank you for your reply. Is it right to understand that the point cloud that can be acquired by TLV is already corrected? As you say, it sholud be corrected to 5 ° upwards, so It looks as follow. (The color of the graph represents SNR, and remove low SNR point) Point cloud is shifted higher. I could see the point cloud where the building exists. But, as you say it's SNR is low. So, I also think this is ghost. Could you tell me the location of the source code that actually performs the 15 ° correction process? If I extract only the high SNR and point cloud is not corrected in the device, it is still consistent with the actual movement. I really want to make sure the correction is done on the device. Best Regards + +Hi, You can find the correction in \labs\common\src\dpu\trackerproc_capon\src\trackerproc_3d.c, line 465. Are you setting the elevation tilt as positive or negative? Regards, Justin + diff --git a/data/text/DLP1/899467 b/data/text/DLP1/899467 new file mode 100644 index 0000000000000000000000000000000000000000..0582319eef03ad060e87180279827986593b4f45 --- /dev/null +++ b/data/text/DLP1/899467 @@ -0,0 +1,14 @@ +LMZM33606: Circuit designed to output 12V is only outputting 1V + +Part Number: LMZM33606 Hi All, This is my first step down converter design using SMD parts. So I'm not sure whether its the design or if I am doing something wrong during mounting the SMD parts with a hot air gun. Hope someone can give some advice and point me in the right direction. The circuit is designed to output 12V from a 15V input (well that was the intention anyway). Reading the voltage output on the scope only indicates 1V. I've attached the schematic, board, BOM and also scope readout for reference. Greatly appreciate the help! + +Hi Spec, Can you check if FB is shorted to VOUT? The internal voltage reference is 1V and if FB is somehow shorted to VOUT it can force VOUT to be 1V as well. Try probing your board and reading out the voltage measurements to check for any abnormal voltages. Also can you try removing the CFF capacitor and retest board operation? Lastly if you can provide a waveform of VIN, VOUT, and SW that would help troubleshoot the problem. The SW can be accessed on the side of the power module through the SW pins (1-6, 31). Regards, Jimmy + +Dear Jimmy, Thanks for the detail pointers. When I set the multimeter to continuity test and probe the FB and VOUT points the sound emitted indicated that those two points are connected. On my actual board as well as my design the FB is connected indirectly to the VOUT through the RFBB, CFF and RFBT and the VOUT plane which the VOUT is connected to. Is this why the FB and VOUT are shorted? When I look back at the reference design in the datasheet it does appear that the FB is connected to VOUT through those resistors and caps. I didn't use a AGND plane in my design so everything is connected to the PGND, perhaps that is why the short between FB and VOUT is happening? FYI, on another prototype the VOUT was fluctuating between 0 V and 2.xx V and did go up to 12V at one point but mostly stayed between 0, 1.xx and 2.xx V. Wonder if this is indicative of the same problem above? Thanks again for your help and looking forward to your feedback. Best Regards, S. + +Hi, Jimmy. Here are the waveforms: 1) VOUT: 2) VIN: 3) SW: SW Frequency of peak to peak SMD Solder Paste - just wondering if the solder paste is fully melting? + +Hi Spec Pro, Looking the exposed pads of the power module on your PCB, it looks like the solder paste has not completely melted and reflowed properly. A proper reflow of the solder paste should result in the thermal pads being shiny and metallic looking. I would suspect that the device that was on your board didn't have all pins connected and would suggest running the reflow at a hotter temperature to ensure the solder paste is completely dissolved and properly coats the exposed pads. Can you try doing this with a new unit and retest for operation? Regards, Jimmy + +Paste is now fully melted and the board is able to convert 15V to 12V. Turns out that heating both sides of the board is necessary to get the paste on the hidden pads to melt as well. Thanks for your help Jimmy! + diff --git a/data/text/DLP1/899473 b/data/text/DLP1/899473 new file mode 100644 index 0000000000000000000000000000000000000000..0fdefca3af8137dd23bdef5f097d3c44086f1271 --- /dev/null +++ b/data/text/DLP1/899473 @@ -0,0 +1,12 @@ +UCC256404: Excel Design Spreadsheet + +Part Number: UCC256404 Hi TI, I have several questions on UCC25640x Design Calculator as below. For LL/SS, why actual Vssinit in cell - 'C208' is 0V? Although it is Option 5 where LL/SS pin is pulled down by internal 1.2kOhm, it should not get 0V. With 13V of Vrvcc, the actual Vssinit = 13 x 1.2k//316k / (1.2k//316k + 549k) = 0.0282V. Can you enable the "table and calculation" tab? I am in a 'black box' in LL/SS calculation. Issup value in cell - 'C197' is 37.5uA while it is 36uA in its datasheet. Which value should we follow? 4. Equation in cell - 'C193' involves actual OVP value, which is incorrect, right? The actual OVP value in cell - 'C192' should be the Upper resistor value in cell - 'C188', right? 5. Would it be OK if switching frequency at no load based on Mg_ꚙ on Mg vs fN curve is more than maximum switching frequency since it would enter burst mode at low load? 6. Is UCC256404 max switching frequency 350kHz? Regards, KK + +VHello KK, Thank you for your interest in the UCC256404 LLC controller. Here are responses to your questions: 1. It was deemed that the Vssinit voltage was close enough to zero to simply initialize C208 to 0V. 2. The hidden tab contains background calculations and is not well organized because it was not expected to be shown. If you have a question about some specific LL/SS calculation we can help you with that. 3. The nominal value of Issup was originally 37.5uA, but changed to 36uA before release. The calculator tool missed this change. 36uA is the correct value. 4. You are correct; there is an erroneous cell reference. It should be to the Upper resistor in cell C188. 5. Yes, this is okay. 6. The UCC25640x series is capable of switching up to 1Mhz, but usually is used lower than this. A full-load steady-state frequency of 350kHz is comfortable upper design target limit to allow for higher frequencies during start-up, light loads, and transients. Thank you for helping us find these errors. We'll be upgrading the calculator tool shortly, though I cannot predict when the new version will become available. Hopefully very soon. Regards, Ulrich + +Hi Ulrich, Thank you for your answers. I have further question on previous item-1 and other questions With Vssinit = 0V, VTH value cannot be acquired according to above equation captured from UCC25640x datasheet (Equation-76). Is Vssinit= 0V correct? Since VTH value cannot be acquired, LL/SS Upper & Lower Resistance values cannot be acquired according to Equation-78 and -79 in its datasheet. If Vssinit is not 0V, what should we do to get LL/SS Upper & Lower Resistance values for Option-5? The suggested range is 3V and 4.5V according to its datasheet instead of between 3V and 5.5V according tocompany Design Calculator for VCR pin voltage peak to peak. Which is correct? The common mode voltage of VCP pin from datasheet is 3V while is 3.02V from Design Calculator. Which is correct? Regards, KK + +Hello KK, 1. I've been informed that the calculations for the Upper and Lower LL/SS resistors proceeds with the value that Vssinit would be as if Option 5 was not selected. 2. 3V to 5.5V is okay for the suggested range. 3. The Vcm is 3.00V. The typical value in the datasheet specification table was adjusted slightly from a previous 3.02V after the calculator had been developed. This 20mV offset from typical makes less than 1% difference in the results. Regards, Ulrich + +Hi Ulrich, Cancompany share the calculation details on cells - 'C202, 'C204, 'C205', 'C208' and 'C209'? Regards, KK + diff --git a/data/text/DLP1/899484 b/data/text/DLP1/899484 new file mode 100644 index 0000000000000000000000000000000000000000..fcf594738d0b35a3f76d9ab5504ba852e2655d7d --- /dev/null +++ b/data/text/DLP1/899484 @@ -0,0 +1,16 @@ +TPS54201: 10KHz noise of TPS54201 output ..... + +Part Number: TPS54201 Dear Sirs, My customer found their TPS54201 output will have 10KHz noise sound. The sound seem came from inductor or capacitor! Below is schematics and waveform. Customer use DC 3.3V for PWM input for test now. Can you help to advice which point we can pay attention? Thanks. + +Hi Peter, So you have used a pure DV voltage level instead of PWM signal to dimming? You can try to increase the capacitor value between LEDs. What's the cap value that you used? It is not clear in the picture. Another suggestion is increasing the cap value connected to FB pin. BR Sean + +Hi Peter, Is there any update? Have you found the root cause? BR Sean + +Hi Sean, 1. update clear schematics. 2. already have 2x22uF caps in parallel between LED. what value will you suggest to use? (in red circle) 3. had test 1uF cap connect to FB pin but still fail! Is there any suggest else? Thanks. + +Hi Peter, Since there is no 10kHz signal inside of TPS54201, I guess it may come from the power supply, so can you try with a 12V DC power to test? And what's the frequency of the PWM dimming signal? It is 10kHz? We recommend >50kHz. BR Sean + +Hi Sean, OK! i will check with customer and make sure the 12V input is from DC power supply and try again! BTW, the PWM signal that customer use for testing now is pure DC level.(3.3V). + +Hi Peter, Yes, please try again and give me an update later. BR Sean + diff --git a/data/text/DLP1/899485 b/data/text/DLP1/899485 new file mode 100644 index 0000000000000000000000000000000000000000..9ea7b34528e82449eb04ebe7ba1828eeed5c817e --- /dev/null +++ b/data/text/DLP1/899485 @@ -0,0 +1,16 @@ +OPT3101EVM: OPT3101 EVM Emitter modulation + +Part Number: OPT3101EVM Hello Support, I am using an OPT3101 EVM module and want to know if the emitted light signal can in any way be modulated from my side. Is it possible to emit sinusoidally modulated light signal from the emitter? Even with external modulation? Thanks in advance. best regards, Ayushya + +Hi, What is the reason for doing this? OPT3101 already modulates the emitter with a 10MHz square wave. Are you trying to add a lower frequency component on top of this? Can you also give some background on your application and use-case here for me to better understand? Best, Alex + +Hello Alex, Thanks for your reply. I want to modulate the emitter with a sinusoidal wave, although with the same amplitude and frequency. Best, Ayushya + +Hi, You cannot change the 10MHz modulation to a sine wave. Best, Alex + +Hello Alex, Thanks for your reply. So, is there any way that I can attempt to emit a sinusoidally modulated light signal from the LED and then receive the reflected light (which will also be sine) by the Photodiode? Any assistence is hugely appreciated. Best regards Ayushya + +Hi Ayushya, Is this question different from what I answered above? If so I will need more details of what you are trying to do. Best, Alex + +Hi Alex, thanks again. My project is based on distance measurement using time of flight. In this, an emitter transmits a sinusoidally modulated light signal in NIR range, and based on the phase shift of the reflected sinusoidal light signal, the distance is measured. There is an algorithm to be developed which will remove the Multipath Interference from the received light signal. See image : I was initially hoping that the OPT3101EVM might be useful in collecting the received signal from the sensor and also that the LED can be supplied with a sinusoidal signal. Please let me know if there is more information I can provide on this. Thanks and regards Ayushya + diff --git a/data/text/DLP1/899486 b/data/text/DLP1/899486 new file mode 100644 index 0000000000000000000000000000000000000000..049b39ec04e256bdde0b7be576055c2b29e0cfdb --- /dev/null +++ b/data/text/DLP1/899486 @@ -0,0 +1,10 @@ +TPS7A4501-SP: Stability and Power Dissipation + +Part Number: TPS7A4501-SP 1) I have put 10uF capacitors at the input and output end of the LDO TPS7A4501-SP. What value of capacitor (between Vout and ADJ) is required to get better phase margin and reduced noise? 2) What is the maximum power dissipation of the device TPS7A4501-SP? + +Akash, 1) There is a section in the datasheet that discusses compensation and the calculations associated with it for your particular requirements. See 9.2.2.2. 9.2.2.1 also has good information regarding the choice of capacitor. 2) There are several sections of the datasheet that are pertinent for managing thermal performance of the device. Key points. Recommended operating junction maximum temperature is 125c. So, this is the value you must design to to insure device is operating under warranted specifications. The HKU packaged device has a thermal landing that is necessary to electrically and thermally connect to the board. This improves the devices ability to dissipate heat to the board. There is a table of thermal properties for each of the 2 package types in section 7.4. Use the appropriate value depending on your package. From this table, use the information in section 11.3. to calculate the maximum junction temperature with your configuration. (Vin, Vout, Iout, case temp, ...) This will take into account the amount of power that is required to be dissipated internally due to device being a linear regulator. Additionally, there is general information on the thermal metrics and calculations in this application note. This application note is linked in the datasheet in the Thermal information table section 7.4. If this answers your question, please click "This Resolved My Issue" Regards, Wade + +In datasheet section 9.2.2.2, the second pole and zero frequency is calculated using C3=470pF. But how to know the phase margin is improved using 470pF capacitor and what is the first pole frequency. Also how it reduce the output noise? How to know that 470pF will work or any other value is required? + +Akash, The datasheet does not go into detail on optimization of the Cff capacitance. This application note describes equation to optimize Cff based on centering the pole an zero around the non Cff response. See With respect to quantifying the noise improvement. I do not have any data that would help quantifying Cff selection for improved noise response. An estimate of phase margin improvement can be ascertained by utilizing the WCA models and fine tuning the Cff as most appropriate for your design. The WCA model for pspice is available in the product folder. If this answers your question, please click "This Resolved My Issue" Regards, Wade + diff --git a/data/text/DLP1/899489 b/data/text/DLP1/899489 new file mode 100644 index 0000000000000000000000000000000000000000..30196944a5ce4989534b18370971828015bda532 --- /dev/null +++ b/data/text/DLP1/899489 @@ -0,0 +1,14 @@ +4 direction detector consultation + +Hi, My customer require an alternative solution for below 4 direction detectors. Can you please suggest ifcompany has a similar solution? thanks. RPI-1035_tilt_Sensor.pdf + +Hello, Generally mmWave sensors are used for sensing the environment around the sensor for example tracking motion of cars or people. Generally it would not be used determine the tilt or orientation of the sensor itself. Amanda + +Hey Yue, Honestly, from that datasheet I can't even tell what a 4 direction detector sensor is. What is the application? Thanks, JD + +Hey Yue, After some searching, I was able to find this page that explains what a 4 direction sensor does: https://www.parallax.com/product/28036 Basically, it just detects what side is "Up." I don't thinkcompany makes anything like this, but I'll try and loop the sensing groups in to confirm. Thanks, JD + +for vacuum cleaner. + +Hello Yue, Its a bot unclear on what is needed here. Based on the little information if the requirement is for a vacuum cleaner. I am not sure if you are talking about a robotic vacuum cleaner. If its yes then I recommend a technote on using ultrasonics /lit/an/slaa909/slaa909.pdf?ts=1587959566069 for object detection. but on the previous research I would be more inclined towards an optical solution. + diff --git a/data/text/DLP1/899490 b/data/text/DLP1/899490 new file mode 100644 index 0000000000000000000000000000000000000000..8df8faa1ef5e510e3ab4f69066362d2198533745 --- /dev/null +++ b/data/text/DLP1/899490 @@ -0,0 +1,20 @@ +TPS61087: LED PWM dimming using TPS61087 + +Part Number: TPS61087 Dear all I would like to ask questions about LED PWM dimming using TPS61087. Our customer is trying to do LED dimming by inputting a 200Hz pulse signal to the EN pin as in the following application example (listed in the TPS61087 data sheet). I would like to know about the following contents. ①By checking the above circuit example, I think that the above dimming is possible. Is this possible even if the conditions such as input / output voltage change? * By the way, our customers are trying to implement under the following conditions. Vin = 3.0V-4.2V Vout = 6.5V (or 6.0V) Iout = 1.0A Fsw = 650kHz ② Is there any concern when dimming the LED by inputting a pulse signal to the EN pin as in the above circuit example? （I think it is necessary to pay attention to the responsiveness such as making the value of Rcomp larger than the calculated value of the data sheet.） Best Regards, Y.Ottey + +Dear Sir, It is very corner. They need to choose a very small sense resistor Like 0.1-0.2 ohm. So can't output such big current. + +Dear Helen Thank you for your reply. "It is very corner. They need to choose a very small sense resistor Like 0.1-0.2 ohm. So can't output such big current." If you place Rsense as you say, what is the maximum output current that is possible under the following conditions? Vin = 3.0V-4.2V Vout = 6.5V (or 6.0V) Fsw = 650kHz Regards, ]Y.Ottey + +Dear Sir, It is 1A maximum based on >85% efficiency. If the efficiency is lower than 85% because of bad layout , poor inductor, then only 0.8- 0.9A maximum depend on the efficiency. You can refer to thecompany design PMP15037 for the circuit design. + +Dear Helen Thank you for your reply. I have additional questions. " They need to choose a very small sense resistor Like 0.1-0.2 ohm" You are saying that you need to place 0.1 to 0.2mΩ on Rsense to output 1A as above. However, if 1A flows to Rsense 0.1 to 0.2Ω, the voltage applied to the FB pin will be 0.1 to 0.2V. This conflicts with the FB pin voltage of TPS61087 typ 1.238V. Please explain why Rsense needs 0.1 to 0.2Ω. (I would be glad if you could share any reference material.) Regards, Y.Ottey + +Please check the calculation in the PMP15037. They need to change the circuit similar to PMP15037. Need to re calculate the dividing resistor and Rlimit. + +Dear Helen Thank you for your reply. I have a question about the calculation in PMP15037. 1. I think that the dimming at the EN pin this time can be calculated by the resistance value in the circuit example below. Is this correct? (I think that R12 = Rlimit and Rs = Rsense.) ※ There was no circuit example for dimming with the EN pin on the PMP15037. If the question in 2.1. Is OK, there is no R11 in the application example in the datasheet. Do you need this resistance? Also, what happens to the calculation of R12 and Rs when R11 is not needed? 3. Is the Rsense value as small as 0.1 to 0.2Ω when the LED in the circuit diagram of the TPS61087 data sheet Figure.21 is replaced with one LED with Vf = 6.15V and If = 1A? + +Hi Ottey, The aim of PMP15037 is to reduce the loss across the Rsense, without R11, the voltage across Rs should reach Vref in order to regulate. So Rsense need to be higher than 1 ohm, results in a >1W loss with 1A LED current. You can ask the customer read the PMP15037 in detail, it is easy to be understand. If they have MCU generate PWM signal, it is better to use the method in PMP15037. It has nothing to do with the one LED or multi LED . + +Hi Helen Thank you for your reply. Let me check one thing. I understand that the purpose you proposed the PMP15037 is to reduce losses in Rsense. Is Rsense = 0.1-0.2Ω that you were doing recognized as the value after placing R11 and R12 in the circuit diagram below? If it is not necessary to consider loss (efficiency), is there any problem if Rsense is set to 1Ω or more and a 200kHz pulse is input to the EN pin without R11 and R12? + diff --git a/data/text/DLP1/899493 b/data/text/DLP1/899493 new file mode 100644 index 0000000000000000000000000000000000000000..f2a45af5e792d49cbba1e9f98e6af0a1784a2da5 --- /dev/null +++ b/data/text/DLP1/899493 @@ -0,0 +1,10 @@ +TPS92602-Q1: TPS92602 car light design + +Part Number: TPS92602-Q1 Dear Sir/Ms. My customer ask forcompany reference design(Turn Key Solution) for following 2 spec. Spec. 1 (Head Light , High Beam + Low Beam) Input: 9V~16V, 13.5V Normal , Chanel 1 Vout 13.5V/1A Chanel 2 Vout 13.5V/0.8A Channel 1 Low Beam Spec. parameter unit LED VF TYP. 6.75 V LED VF TYP. 1 A LED Total # 2 PCS LED Steam 2 PCS LED Parallel 1 PCS Total Output Voltage 13.5 V Output Current 1 A Output Power 13.5 W Typical Input Voutage 13.5 V Channel 2 High Beam Spec. parameter unit LED VF TYP. 6.75 V LED VF TYP. 0.8 A LED Total # 2 PCS LED Steam 2 PCS LED Parallel 1 PCS Total Output Voltage 13.5 V Output Current 0.8 A Output Power 10.8 W Typical Input Voutage 13.5 V Spec. 2 (Head Light, DRL & Position) Input: 9V~16V, 13.5V Normal , Chanel 1: Vout 46.2V/0.1A PWM Dimming to 0.02A Chanel 2: Vout 64.2V/0.1A PWM Dimming to 0.02A Channel 1 DRL/Position Driver parameter unit LED VF TYP. 3.3 V LED Current TYP. (PWM DIMMING) 0.1/0.02 A LED Total # 14 PCS LED Steam 14 PCS LED Parallel 1 PCS Total Output Voltage 46.2 V Output Current 0.1/0.02 A Output Power 4.62/0.924 W Typical Input Voutage 13.5 V Channel 2 DRL/Position Driver parameter unit LED VF TYP. 3.3 V LED Current TYP. (PWM DIMMING) 0.1/0.02 A LED Total # 14 PCS LED Steam 14 PCS LED Parallel 1 PCS Total Output Voltage 46.2 V Output Current 0.1/0.02 A Output Power 4.62/0.924 W Typical Input Voutage 13.5 V Do you have suitable design? Best Regards, Kami Huang + +We don’t have similar reference design. But customer could reference as a example + +Hello Frank, Do you have TPS92602 reference design of SEPIC/Buck-boost topology? I may suggest customer base on the reference design? Best Regards, Kami Huang + +Kami, We don't have a reference design, please reference the circuit below + diff --git a/data/text/DLP1/899501 b/data/text/DLP1/899501 new file mode 100644 index 0000000000000000000000000000000000000000..92d7f568ae1450afcedf5ecdf7a6db17df38759c --- /dev/null +++ b/data/text/DLP1/899501 @@ -0,0 +1,8 @@ +IWR1443BOOST: Heart rate monitoring in small animals + +Part Number: IWR1443BOOST Hi, I recently came across your mmWave for vital signs monitoring. Thecompany general support team suggested I ask my question here. I am a PhD student at the University of Zurich studying wild meerkats. I was wondering if this technology could potentially be used as part of my research to record meerkats heart rate in the field? Ideally the device could be incorporated into a collar worn by the individual. I look forward to hearing from you. All the best, Isabel + +Hi Isabel, It seems very challenging.The Vital Signs Monitoring Lab on thecompany Resource Explorer requires the subject to be seated still at a distance less than 1.5 m from the sensor. Would you be able to at least have the meerkats be completely still? Regards, AG + +Hi Ag, Thank you very much for your reply. As they are wild and this would be conducted in the field, it would not be possible to keep them still. The ideal scenario would be that the meerkats could wear a device and it capture their heart rate while moving. I know this is a big ask. I have seen some commercially available pet collars which use UWB to monitor heart rate in active animals, unfortunately due to the meerkats small size these collars will not work for them. Thanks, Isabel + diff --git a/data/text/DLP1/899506 b/data/text/DLP1/899506 new file mode 100644 index 0000000000000000000000000000000000000000..015b2a974ce06d8a70a99d0bb4994661976e73b3 --- /dev/null +++ b/data/text/DLP1/899506 @@ -0,0 +1,8 @@ +BQ34Z100-G1: self-learning ra flag shows 5555 + +Part Number: BQ34Z100-G1 Golden learning for the gas gauge chip. Qmax sucessful update. During ra table updata period (discharging), Ra table keeps updating, but Ra_a0 flag shows 5555. I notcie that normally this ra flag should begin with ff or 00. Is that correct that ra_flag shows 5555? what does this ra_a0 flag mean? Thank you very much! + +Has your leaning cycle done yet? 0x5555 should mean that the resistance update is still in progress. Andy + +hi andy, thank you for your reply. Understand that 5555 means under updating. but unfortunately i still failed the learning. the ra flag never changed to 0055 until the battery finished discharge. May i know that how can i start another learning cycle? just restart the learning by RESET--DISCHARGE--RELAX--CHARGE--RELAX---DISCHARGE? Do i have to reinstal the firmware? + diff --git a/data/text/DLP1/899515 b/data/text/DLP1/899515 new file mode 100644 index 0000000000000000000000000000000000000000..43bcc54fa6e4df0eb4edd9eba303bdfad6d9caad --- /dev/null +++ b/data/text/DLP1/899515 @@ -0,0 +1,12 @@ +UCC28950EVM-442: UCC28950 EVM-442 light load efficiency poor + +Part Number: UCC28950EVM-442 HI sir I tested the demo board data and found that the efficiency is poor at light load . Because my design that fan is not working at light load In this case,the Phase-Shifted Full-Bridge MOS loss is very larger and breaking The actual test is as follows. Is there any way to improve it? Test data: Pin :17.4W Vout/Iout:12V/0.1A Pin :18.7W Vout/Iout:12V/0.2A Pin :19.8W Vout/Iout:12V/0.3A Pin :20.6W Vout/Iout:12V/0.4A Pin :21.6W Vout/Iout:12V/0.5A TKS + +Hello The UCC28950 (and UCC28951) has a burst mode to reduce dissipation at light loads. Please check that the EVM is operating in Burst Mode at light loads. Also, check that the SR drives are disabled (OUTE = OUTF = 0V). You can increase the TMIN threshold so that the controller enters burst mode at a higher current level. I have run my EVM in my lab at no load continuously without any problems so your unit is behaving a little differently. Please check the above items and let us know how you get on. Regards Colin + +HI Colin I have recheck EVM that has a burst mode and the SR drive is disable at light load(0.1A~0.5A) THE EVM at no load is no problem ,but if add load at 01~0.5A,you will be find that input w is very large and efficiency is poor Pls be check your EVM at 0.1~0.5 load Finally I will try to adjust the TMIN to improve it ? + +Hello If you increase the Tmin value then that will increase the power level at which the EVM enters burst mode - Due to Covid-19 restrictions here in Ireland I won't be able to get into the lab for the forseeable future but I'd expect that my EVM behaves the same as yours. Let me know how you get on Regards Colin + +Hello Just wondering if you had been able to make any progress on this - Regards Colin + diff --git a/data/text/DLP1/899522 b/data/text/DLP1/899522 new file mode 100644 index 0000000000000000000000000000000000000000..f777f3a1f14387a6896719bf282bbbec12a80e8c --- /dev/null +++ b/data/text/DLP1/899522 @@ -0,0 +1,10 @@ +IWR6843ISK-ODS: Azimuth range heatmap + +Part Number: IWR6843ISK-ODS Hi, When "Remove Static Clutter" in mmWave Demo Visualizer, Azimuth-Range Heatmap is stopped. Could you check what is problem? Below is my setting. - SDK 3.3 version - mmWave Demo Visualizer configuration - Results Before "Remove Static Clutter", Azimuth -Range Heatmap looks fine. + +Hello, The azimuth range heatmap being shown is the Zero doppler (static) heatmap. When you use static clutter removal you are essentially removing the majority of the static signal. This is why you don't see any information in the azimuth-range heatmap. If you look at range-doppler heatmap you should be able to see data related to movement in the scene. Amanda + +Hi, There are 3 static clutter removal options in SDK. - AoAProcDSP_clutterRemoval which called from AoAProcDSP_RangeAzimuthHeatmap - AoAProcDSP_clutterRemoval which called from AoAProcDSP_processMultipleVirtualAntennas - DPU_DopplerProcDSP_clutterRemoval All three are executed by "clutterRemoval" command. If there will be no information in azimuth-range heat map when use "clutterRemoval", why AoAProcDSP_clutterRemoval is implemented? And when I comment-out DPU_DopplerProcDSP_clutterRemoval function, still I can't see any information in the azimuth-range heat map. Could you recommend me how to implement both removing static clutter and seeing information in azimuth-range heat map? + +What are you trying to see in the azimuth range heatmap? The azimuth range heatmap is plotting the zero Doppler, Static signal. It is not possible to have useful information in that Static azimuth range heatmap and use static clutter removal. You are removing all the static objects from a plot that is supposed to show static objects. + diff --git a/data/text/DLP1/899527 b/data/text/DLP1/899527 new file mode 100644 index 0000000000000000000000000000000000000000..a60905960afa9197da825b745dde2da7f87f617a --- /dev/null +++ b/data/text/DLP1/899527 @@ -0,0 +1,6 @@ +LM2940-N: Thermal shutdown down + +Part Number: LM2940-N Hi team, Does the device go into shutdown if exceeding Tj ? or does the device have the other number for the temperature of thermal shutdown ? Thank you and best regards, Michiaki + +Hi Tanii-san, The LM2960-N is guaranteed to work up to TJ of 125C. While the datasheet does not state it, most thermal shutdowns occur somewhere between 150 and 160C. I hope this answers your question. + diff --git a/data/text/DLP1/899531 b/data/text/DLP1/899531 new file mode 100644 index 0000000000000000000000000000000000000000..32f0a99e74dffe0450bbb1de9205834484dc056d --- /dev/null +++ b/data/text/DLP1/899531 @@ -0,0 +1,8 @@ +UCC28950 :I don't understand the calculation formula. + +Part Number: UCC28950 I don't understand the calculation formula. I don't understand the calculation formula. + +Hello, Could you describe the question more clearly, where you don't understand? Regards, Teng + +이것은 + diff --git a/data/text/DLP1/899534 b/data/text/DLP1/899534 new file mode 100644 index 0000000000000000000000000000000000000000..7d65730d62385273c44b2bcda5da94544d9cb277 --- /dev/null +++ b/data/text/DLP1/899534 @@ -0,0 +1,10 @@ +TLV700: Reverse current issue + +Part Number: TLV700 Hey E2E I have a situation where a battery is directly tied (with a MOSFET in series, to prevent charging) to Vout of the TLV700. Normally a 5V PSU is tied through a diode to V_in of the LDO, but in this test there is no input source. So when I attach this battery to V_out I see 40mA going into the LDO. I tried pulling CTRL of the LDO down, and it got me to 30mA. According to my measurements all the current is flowing in the LDO only, since I have isolated the circuit from the other parts. I am using a keysight N6705C for the current measurements. Is this normal behaviour? I placed a diode in series with the LDO to avoid back current - but I did not anticipate the LDO to drain all this current by itself! + +Hi Emil, Yes, what you seem to be describing is normal, however it is important to note that it can damage the LDO. When Vout>Vin+0.3V this can cause reverse current (flowing from Vout to Vin) through an internal parasitic diode. This current is not limited by the LDO so this current can cause damage if too much current flows from Vout to Vin. For more information on reverse current please see the following blog post: /blogs_/b/powerhouse/archive/2018/07/25/ldo-basics-preventing-reverse-current-in-ldos + +Yes I have followed that document, and chose "Use a diode before the LDO". If I have that, what kind of current should I expect to be drawn into the LDO (feedback resistors for example) if CTRL=OFF? + +Hi Emil, I'm sorry I misunderstood and thought the diode was added after you found this issue. I have a few questions to help clarify a few things: When you mention pulling CTRL down, are you referring to the enable (EN) pin? When this occurs is the LDO in dropout? + diff --git a/data/text/DLP1/899536 b/data/text/DLP1/899536 new file mode 100644 index 0000000000000000000000000000000000000000..6a2078a154d08640c9a6a2536ad82fdd02b3677d --- /dev/null +++ b/data/text/DLP1/899536 @@ -0,0 +1,12 @@ +CCS/UCD3138A: question about DPWM3 Interrupt + +Part Number: UCD3138A Tool/software: Code Composer Studio The DPWM3 initialized code as follow: // Control-0 Dpwm3Regs.DPWMCTRL0.bit.PWM_EN = 1; // Enable, wait for Global En Dpwm3Regs.DPWMCTRL0.bit.CLA_EN = 0; // CLA Disabled, using curr limit to chop Dpwm3Regs.DPWMCTRL0.bit.PWM_MODE = 0; // Set mode: 0 - Normal Dpwm3Regs.DPWMCTRL0.bit.MSYNC_SLAVE_EN = 1; // slave Dpwm3Regs.DPWMCTRL0.bit.CBC_ADV_CNT_EN = 0; // Adv cnt limit enabled Dpwm3Regs.DPWMCTRL0.bit.CBC_PWM_AB_EN = 0; // Current limit enabled for AB outputs Dpwm3Regs.DPWMCTRL0.bit.PWM_A_INTRA_MUX = 0; Dpwm3Regs.DPWMCTRL0.bit.PWM_B_INTRA_MUX = 0; Dpwm3Regs.DPWMCTRL0.bit.BLANK_A_EN = 1; // Control-1 Dpwm3Regs.DPWMCTRL1.bit.HIRES_DIS = 1; //Dpwm3Regs.DPWMCTRL1.bit.ALL_PHASE_CLK_ENA = 1; Dpwm3Regs.DPWMCTRL1.bit.CHECK_OVERRIDE = 1; Dpwm3Regs.DPWMCTRL1.bit.EVENT_UP_SEL = 1; // UPdate end of period Dpwm3Regs.DPWMEV1.all = DPWM3_EVT1; Dpwm3Regs.DPWMEV2.all = DPWM3_EVT2; Dpwm3Regs.DPWMEV3.all = DPWM3_EVT3; Dpwm3Regs.DPWMEV4.all = DPWM3_EVT4; Dpwm3Regs.DPWMPRD.all = (PWM_PERIOD>>1); Dpwm3Regs.DPWMINT.bit.PRD_INT_SCALE = 2; //every 4 cycles primary(PRD_INT_SCALE = 2) Dpwm3Regs.DPWMINT.bit.PRD_INT_EN = 1; But I find that the dpwm3 interrupt don't happen. I use the PMbus protocol and debug_IO toggle to see it. The fir number is 26 in the fast interrupt. It need your help. Thanks! + +Hi Liwei, In order for interrupt to work you need to enable it in 3 levels. 1) In the peripheral (DPWM3) level (You are already showing this part being done) 2) In the CIM level by calling the two functions: //Configure IRQ write_reqmask(CIMINT_ALL_PWM2_COMP | CIMINT_ALL_DPWM3); //Configure FIQ write_firqpr(CIMINT_ALL_DPWM3); 3) And finally at the global (ARM7) level by calling the two functions: //Enable interrupts enable_fast_interrupt(); enable_interrupt(); So please first verify that all 3 steps are complete. If all the above does not work, please check fiq number 27 instead of 26. Regards, Yitzhak + +Hi, Yitzhak: Thank you very much! You are right. I forget to set the register of IRQ. I change the firmware, but only set the IRQ and not set the FIQ. Then UCD3138 could not program again. I write 0x5a5a with command 0xD8 to it. It return NACK. Why? How can I save UCD3138 to program again? + +Hi Liwei, Glad it helped. If you mean to write into IRQ register, this can only be done in ARM7 privileged mode and not in user mode. That is why the "functions" write_firqpr() and write_reqmask() are implemented by software interrupt and not as ordinary functions. Just change the parameters in the calls to the above two functions instead. Regards, + +Hi,Yitzhak: Thank you! + diff --git a/data/text/DLP1/899542 b/data/text/DLP1/899542 new file mode 100644 index 0000000000000000000000000000000000000000..fd4384fc78a26b0a765a7a42aa574b406e74fc71 --- /dev/null +++ b/data/text/DLP1/899542 @@ -0,0 +1,6 @@ +WEBENCH® Tools/TPSM846C24: Input Capacitor Selection + +Part Number: TPSM846C24 Tool/software: WEBENCH® Design Tools Hi team, My customer wants to replace D/S recommended 330uF input bulk capacitor to MLCC due to availability issue. He wants to know if it is OK to replace bulk cap by 47uF x7 (329uF) MLCC, or fewer. 47uF MLCC will be 16V rated and it is going to decrease -30% - -53% capacitance due to DC bias. My customer don't want to use neither aluminum cap nor tantalum cap. Please help us move forward with 47uF MLCC. Regards, Itoh + +Hi Itoh-san, It should be fine to use ceramic capacitors but some considerations should be kept in mind. What are the input voltage ripple and transient requirements? Does the proposed total ceramic input cap with derating due to DC bias still allow them to meet their input ripple requirements? You can refer to this app note for guidance on determining cap value. The other consideration is what the input source inductance is. If the input supply is coming in through long inductive leads or if an input filter inductor is used before the TPSM846C24, then this L-C can have high a high Q that can lead to input ringing, especially if all ceramic capacitors are used. The higher ESR of an aluminum/tantalum helps dampen out this resonance and is why we often include a bulk cap on our EVMs and other boards where the input is coming from a bench supply. If all ceramic input cap is used with an inductive source, then other methods may be needed to dampen the effective input filter as discussed in this app note on input filter design. + diff --git a/data/text/DLP1/899549 b/data/text/DLP1/899549 new file mode 100644 index 0000000000000000000000000000000000000000..9c18f46a32c5cd04b19babeb091056be10f56d7a --- /dev/null +++ b/data/text/DLP1/899549 @@ -0,0 +1,10 @@ +TPS23754: Dual input solutions? (one is PoE and the other is 5V adapter) + +Part Number: TPS23754 Hi Team, My customer applies TPS23754 in their new project (output 5V/5A). And they have dual input, one is from PoE and the other is 5V adapter. May I know how to achieve disable TPS23754 when 5V adapter plug-in and connect the power path right directly to the output load (5V)? Is this function achievable? Thanks and best regards, Jamie + +Hello Jamie, Yes this is possible. Please refer to Option 3 in the following paper: /lit/an/slva306a/slva306a.pdf The challenge is to turn off the PoE when adapter is present. The paper outlines how to do this by disabling detection. If this post answers your question, please indicate so by marking this thread as resolved. Thank you. Regards, Michael P. Applications Engineer customer organization + +Hi Michael, Could I send the schematic to you so you could help to check if there is a problem? Thanks for your kindly support. Best regards, Jamie + +Hello Jamie, I will support this request through email. Thank you! Regards, Michael Pahl + diff --git a/data/text/DLP1/899559 b/data/text/DLP1/899559 new file mode 100644 index 0000000000000000000000000000000000000000..1f17b4d3a20cf80dbca4a3cbb16dfdc3dbe424c2 --- /dev/null +++ b/data/text/DLP1/899559 @@ -0,0 +1,10 @@ +LM5175: Inductor selection + +Part Number: LM5175 Dear *, inductor selection for LM5175, different value from calculator and equation in datasheet eg. Vinmin =9V, Vinnom = 12V, Vinmax=27V, Vout=9V, Iout=2A, fsw=490kHz also eg. Vinmin =9V, Vinnom = 12V, Vinmax=27V, Vout=48V, Iout=0.5A, fsw=490kHz Calculator output L recommended 25.2uH -> equation (14) in Ds L=14.02uH why is this so, is there a error in calculator? Best Regards. + +Hi d_zero, Thank you for your interests in the LM5175. These equations are used to help find the required inductance per ripple current limit (40% ripple current is used in the example), since the ripple current will change with duty cycle, this is why you get two different results. Then, you need to do a trade-off to make your final decision. The selected inductance is usually between eq (13) and (14) results. In your case, eq (13) does not apply. Therefore, the calculator choose a value for you. It calculates the inductance per eq (14) for min, typical and max input voltage, and choose the mean value among them. It ends up to ~25uH. Hope this clarifies. Thanks, Youhao Xi, Applications Engineering + +Hi Youhao, 1) if i understand correctly if booth equations 13 and 14 are apply, the output voltage can be buck, buck-boost or boost regarding to Vinmin, Vintyp and Vinmax then the read off is made regarding to eq 13 and eq 14 is that correct? 2) if only one of the eq13 or eq14 applies then the output voltage is either buck or boost regarding to Vinmin, Vintyp and Vinmax , and then i have to calculate the eq13 or eq14 with all Vinmin, Vintyp and Vinmax and do a mean value? 3) can you tell why 40% ripple current is chosen in DS, on what does depend this? Ho does the ripple current change regarding to duty-cycle? How is the duty cycle calculated for LM5175, also how it is calculated in CCM and DCM mode? 4) Regarding the inductor tread off, what is the tread-off if i choose bigger or smaller inductance value? Also does this depend on CCM and DCM mode of operation? 5) i'm trying to calculate inductor for Vinmin = 9V Vinmax = 27V Vintyp = 12V or 24V But i want have adjustable Vout with DAC from 3V to 48V ( Pmax 24W, Ioutmax 2A) i cant do this with your calculator so i made an excel, please can you look at it and what do you think it is a good thing to go with 10uH inductor? Vin min 9 V diL 0.4 Vin 12 V Vin 24 V Vin max 27 V Rt calc 49.751793 kOhm Rt 49.9 kOmh fsw calc 488.6869 kHz fsw 490 kHz Vout [V] 3 6 9 12 15 18 21 24 27 36 48 Iout max [A] 2 2 2 2 1.6 1.333333 1.142857 1 0.888889 0.666667 0.5 Lrec [uH] (company calculator) 5.1 6.4 3.8 7 9.7 11.6 11.5 10.3 7.3 17.5 25.3 L_buck_vin_min 5.11575 5.11575 0 -10.2315 -31.9734 -69.0626 -125.336 -204.63 -310.782 -828.752 -2128.15 L_buck_vin_12V 5.7552188 7.673625 5.755219 0 -11.99 -34.5313 -70.5014 -122.778 -194.239 -552.501 -1473.34 L_buck_vin_24V 6.7144219 11.51044 14.38805 15.34725 17.98506 17.26566 11.75024 0 -19.4239 -138.125 -491.112 L_buck_vin_max (eq13) 6.821 11.93675 15.34725 17.0525 21.31563 23.02088 20.88931 13.642 0 -92.0835 -381.976 L_boost_vin_min (eq14) -138.1253 -17.2657 0 4.316414 6.906263 8.632828 9.866089 10.79104 11.51044 12.94924 14.02835 L_boost_vin_12V -368.334 -61.389 -13.642 0 6.1389 10.2315 13.15479 15.34725 17.0525 20.463 23.02088 L_boost_vin_24V -3437.784 -736.668 -272.84 -122.778 -73.6668 -40.926 -17.5397 0 13.642 40.926 61.389 L_boost_vin_max -4972.509 -1087.74 -414.376 -194.239 -124.313 -77.6955 -44.3974 -19.4239 0 38.84773 67.98352 L_select 10 10 10 10 10 10 10 10 10 10 10 eff 0.9 iLmax (eq15) 0.7407407 1.481481 2.222222 2.962963 2.962963 2.962963 2.962963 2.962963 2.962963 2.962963 2.962963 iLpeak (eq16) -1.100929 1.021064 2.222222 3.193172 3.331297 3.42338 3.489154 3.538485 3.576853 3.653589 3.711141 iLsat (eq17) -1.651394 1.531596 3.333333 4.789758 4.996945 5.135071 5.233732 5.307727 5.365279 5.480384 5.566712 Best Regards. + +My answers: (1) Yes (2) Yes (3) It is a general good practice. You can also choose 10% to 60%. The ideal inductor will have 0% ripple current but you cannot have it in reality. If the ripple current is too high, you are more easily running into DCM at reduced load. (4) The results under different conditions require different values. The trade off is not to go extreme. You should choose one to be fair with all these conditions. (5) Our calculator is set for a single Vout level. What you calculated looks fine. You effort can be saved if you run our calculator for different Vout and Iout conditions and get a list of recommended inductor, then choose a mean value like said in (4). You should conclude to the same. Thanks Youhao + diff --git a/data/text/DLP1/899560 b/data/text/DLP1/899560 new file mode 100644 index 0000000000000000000000000000000000000000..821e740812baafa11f57e0468dd4c6a67d4bca4e --- /dev/null +++ b/data/text/DLP1/899560 @@ -0,0 +1,10 @@ +TPS61087-Q1: DRC0010R and DRC0010J + +Part Number: TPS61087-Q1 Hi Team, What is the difference between DRC0010R and DRC0010J? If customer need to draw the package, which one should they draw, R or J? There are two types of thermal resistance, but there is indeed only one type of package VSON. Is there any difference between the two types of thermal resistance in the shape of chip? + +Amelie, No big difference, either package is OK. + +Hi Helen, Thanks for your reply. Which package do you recommend? It seems WDR has better thermal performance. So the 2nd one TPS61087QWDRCRQ1 is the better choice? + +Amelie, I replied you by email. it depend on the customer. if they want to check the soldering by eye, then they can use WDRC, this is a new package generated last year. while the other is old one. WDRC is more expensive. Some high-level automotive customer likes it. While DRC is cheap and most customer choose this one. + diff --git a/data/text/DLP1/899569 b/data/text/DLP1/899569 new file mode 100644 index 0000000000000000000000000000000000000000..2725c29e2a75c48e75c072a75c12f9e975609034 --- /dev/null +++ b/data/text/DLP1/899569 @@ -0,0 +1,8 @@ +BQ35100: Chemistry ID + +Part Number: BQ35100 Hi, Good day. I hope everything is fine at your place. Our customer tried to find the cell that they will use in the chemistry table in BQStudio and they didn't find it. The table is updated (786). The cell is the "ER34615M" from ULTRALIFE. The nearest one is the number Chem ID 0622. Is that the good one ? I would appreciate your support for this. Thank you and have a great day. Regards, Cedrick 001007605-da-01-en-ULTRALIFE_LITHIUM_BATTERIE_ER34615M_D.pdf + +I have assigned this issue to my colleague and he will get back to you. Andy + +Cedrick, Unfortunately there is currently no way to match a primary cell to one listed in our database. A new ChemID would be needed. I will start a private thread to get you connected to the correct person. Thanks, Eric Vos + diff --git a/data/text/DLP1/899574 b/data/text/DLP1/899574 new file mode 100644 index 0000000000000000000000000000000000000000..f06daafde7ab44f5b3de8b3366b690a8b13af7ad --- /dev/null +++ b/data/text/DLP1/899574 @@ -0,0 +1,25 @@ +IWR6843ISK-ODS: Some question about unit test of mmwave library (SDK3.3.0.03) + +Part Number: IWR6843ISK-ODS Hi all, I have some doubts about the tests inside the packages\ti\control\mmwave of SDK3.3.0.03. YFI, I use an environment with a IWR6843ISK-ODS installed on a MMWAVEICBOOST. 1 - The 4 tests in minimal are the same included in the full tests? 2 - The last print of the test is "Feature: MMWave MSS Deinitialized: Passed". Is it correct? I expekt a conclusion like the other test: ****************************************** Debug: MmwaveLink Test completed ****************************************** 3 - To running a test I have to set the gTestSelection global variable in MSS and DSS also. For the MSS I use the console windows in CCS. Instead for the DSS I have to use the "expressions" windows. Is this the correct way to work? 4 - I have some problem after each test of "Calibration Data Save/Restore". After these tests I cannot launch another test correctly, even if I reset the MMWAVEICBOOST with NRST button. The error happens when I running the DSS: [C674X_0] ti.sysbios.heaps.HeapMem: line 429: assertion failure: A_invalidFree: Invalid free xdc.runtime.Error.raise: terminating execution The unique way that I have found to fix this problem is to power down and power up the board. Regards, Stefano + +Hi Stefano, 1. As the name suggests, the tests under minimal configure the mmWave library in MINIMAL config mode while those in under full configure it in FULL config mode. Please refer to the mode definition MMWave_ConfigurationMode_e in C:\ti\mmwave_sdk_03_03_00_03\packages\ti\control\mmwave\mmwave.h 2. Please allow me a few days to check the expected output and get back to you on this. 3. Looking at the code for MMWaveLink_initTask in main_full_dss.c and main_full_mss.c, this is expected behavior. MSS reads the testSelection variable from stdin (concole) while DSS uses the global directly as shown below main_full_dss.c /* We are waiting for the test selection to be entered by the MSS. The DSS and MSS need + * to work in cojunction with each other. */ + System_printf ("***************************************************\n"); + System_printf ("Waiting for the test selection to be entered by MSS\n"); + System_printf ("In CCS: Set the Global Variable 'gTestSelection'\n"); + System_printf ("***************************************************\n"); + while (1) + { + if ((gTestSelection >= 1) && (gTestSelection <= 9)) + break; + Task_sleep(1); + } main_full_mss.c System_printf ("8. [Cooperative Mode] MSS Calibration Data Save/Restore\n"); + System_printf ("9. [Cooperative Mode] DSS Calibration Data Save/Restore\n"); + System_printf ("*************************************************\n"); + System_printf ("Enter your choice: "); + if (gMCPIEnable == 0) /* Run test from CCS */ + { + fgets (inputString, 3U, stdin); + gTestSelection = inputString[0] - '0'; + } 4. Please allow me a few days to check on this. I will get back to you on items 2 and 4 next week. Regards -Nitin + diff --git a/data/text/DLP1/899576 b/data/text/DLP1/899576 new file mode 100644 index 0000000000000000000000000000000000000000..20538c66f4a82d274e99f2334b2154850a77b73d --- /dev/null +++ b/data/text/DLP1/899576 @@ -0,0 +1,8 @@ +LM3409: Can I drive a single LED? + +Part Number: LM3409 Hi, I would like to use the LM3409 to drive a single LED with a forward voltage as low as 1.5V but as high as 6.2V with in input voltage of 24V. The output LED current will range from 250mA to 4A. Can I use a fixed off-time by using a fixed voltage at Roff, Coff network instead of Vo? Thank you, David + +Hello David, Yes you can drive that load, you just have to make sure the minimum on-time doesn't get reached. This means the switching frequency cannot be on the high end. Ton of 211 ns is the maximum Tonmin. (Vout/Vin)*1/Fsw needs to stay above this where Vout is the lowest voltage. The off time can be generated from an external voltage however the off time compensation for keeping the current ripple constant will not be functioning. To mitigate this as much as possible is to minimize the current ripple (higher inductor value) since the LM3409 regulates peak current and the current ripple will change with change in output voltage. If your input voltage is fixed at 24 volts you can even use that for the Roff. Another option is figure 27, page 17 of the datasheet which is used for shunt FET dimming. This also works for low output voltages and start-up issues with low output voltage and high output capacitance. Since your output voltage range is very low the off-time compensation will not be that accurate regardless since it's based on charging an RC to 1.243V. Best Regards, + +Hi Irwin, Thank you for your quick response. Regards, David + diff --git a/data/text/DLP1/899581 b/data/text/DLP1/899581 new file mode 100644 index 0000000000000000000000000000000000000000..14403a0815e70099d3f878f63bc9b35f0fefbeea --- /dev/null +++ b/data/text/DLP1/899581 @@ -0,0 +1,12 @@ +BQ27520EVM: battery SOC suddenly drops to 0 + +Hello technical support： At present, we have successfully learned the battery charge curve on the bq27520evm. Were also strictly according to the learning cycle document and get the dffs with STATUS = 2. When we use the EVM to test the accuracy of the battery charge curve , we found that if we use a larger load (2A) , the SOC will directly jump value to 0 from a large value . The watch log is shown in the figure below. The log and ggfile of the whole process are also provided in the attachment, please help to check this problem. Thanks ! 200423.rar + +We will take a look and get back to you. Andy + +I see in your gg file, the chemistry id 3359 is used. It is for a battery that operates from 4.35V to 3.0V. Did you use the GPCCHEM tool to find out this chemistry id? Can I see your GPC report? Also, did you see the same issue when you did the learning cycle? Thanks. Andy + +Hi andy, Thank you for your review and reply！ I have used the GPC tool to conduct two chemical ID evaluations. One of the original data was generated by the battery manufacturer's charge and discharge test , and the other one was generated from bqstudio . Both two tests are strictly followed the GPC data collection document. Could you please help me to see if these two chemical IDs can be used , will it cause the above problems? Do I need to learn chemistry ID again ? Reports are in the attachment. data-report1.zipdata-report0.zip In addition, we use 1 / 7C discharge rate training (900ma) in the learning cycle, but the discharge current of the typical application is about 2A. Is this the main reason cause above problems? Do we need to use 2A discharge current during the constant current discharge step during learning? But I worry that may cause a fail learning due to the discharge rate recommended in official document is 0.1C ~ 0.2C. + +Yes, you can increase the rate so that we need to be above 0.1 C for learning cycle. + diff --git a/data/text/DLP1/899582 b/data/text/DLP1/899582 new file mode 100644 index 0000000000000000000000000000000000000000..c9c833dda0d569d105c071aef831dec0b093e90c --- /dev/null +++ b/data/text/DLP1/899582 @@ -0,0 +1,10 @@ +TPS54325: Input 5V power up, sometimes TPS54325 do not output. + +Part Number: TPS54325 Hi team, My customer used TPS54325 for 5V input to 1.2V output. If the 5V power up slowly up to 16ms, TPS54325 don't ouput 1.2V, like shutdown. If the 5V power up quicker up to 5ms, TPS54325 work normally and have 1.2V output. Do you know why? Below waveform show 1.2V shutdown + +Eggsy, TPS54325 has latching under voltage protection. If the input voltage rises too slowly and the output is not within 70% of the set value after 1.7 X the slow start time, the device will latch off. See section 8.3.5 in the datasheet. + +Hi John, DO you see the waveform blue one. We can see the FB pin voltage go up and go down. Do you know why? Thanks! + +Eggsy, The scope shot is too low resolution. I cannot read anything from it. What are the voltage scales? + diff --git a/data/text/DLP1/899586 b/data/text/DLP1/899586 new file mode 100644 index 0000000000000000000000000000000000000000..2816b69e49d0940b6ce7d554d753585f253a95c5 --- /dev/null +++ b/data/text/DLP1/899586 @@ -0,0 +1,14 @@ +BQ25703A: protect circuit + +Part Number: BQ25703A Hicompany engineer, I am in a puzzle about the schematic in PMP40294 Reference Design Board. It's protect circuit has NetLable named GG_CHG and GG_DSG, they don't have a corresponding lable in the schematic. Could you please explain a little about the working principle of the circuit in the picture below? especially why choose the CELL1 as the Q12's Grid, and how GG_CHG or GG_DSG refluce the charge and discharge process. Thanks a lot! + +It looks like part of the schematic is missing. Let me check with the circuit designer. + +Hi, The designer of this project was no longer in TI. Let me look for other guy to figure it out. Will reply you once I got it. Regards, Richard + +Thank you for taking the time out of your busy schedule to help me answer my doubts . Thanks again! + +Hi, Friend, If we see the schematic, this block is connected to battery pack. Usually, this block will contain gas gauge IC, back-to-back FET, and battery. Original design is planning to add the circuit of gas gauge IC, back-to-back FET. With some reason the designer removed this part(U7 is not soldered on the board). However, it doesn't affect us to evaluate the whole system. The below reserved schematic will help you understand how these block work. Hope this will help. If you are interested in the gas gauge part, please check the BQ3060. + +Thank you very much. I have learned a lot from this schematic.company engineers are awesome！ + diff --git a/data/text/DLP1/899604 b/data/text/DLP1/899604 new file mode 100644 index 0000000000000000000000000000000000000000..af81aea51a4b6a2bf5cad3ff461982fa2fc9a6a1 --- /dev/null +++ b/data/text/DLP1/899604 @@ -0,0 +1,6 @@ +TPS92830-Q1: TPS92830 with 4 channels + +Part Number: TPS92830-Q1 Hello, customer is searching for a RGBW LED driver like the TPS92830 but with 4 channels for RGB + W. Regards, Holger + +Hi Holger, TPS92830-Q1 is a 3 channel LED controller. And we only have one controller in road map. i recommend you to notice TP292638-Q1 and 4 pcs of TPS9261X-Q1 to individually control. + diff --git a/data/text/DLP1/899611 b/data/text/DLP1/899611 new file mode 100644 index 0000000000000000000000000000000000000000..d526b4b3a48edd595e961d724c97dbfb5200fcd8 --- /dev/null +++ b/data/text/DLP1/899611 @@ -0,0 +1,10 @@ +TPS55165Q1-EVM: How to enable IGN_PWRL function and SS_EN + +Part Number: TPS55165Q1-EVM I want to use the TPS55165Q1 IC with the following settings: 1- Normal Mode ( Always ) with output 12v fixed. 2- Power latch on ( always on even if battery voltage drop during crank ) , without external micro-controller signal if possible . using a pull up or pull down is preferred . 3- with Spread-Spectrum enabled to reduce EMI . Problem 1: I have problem understanding how to connect IGN_PWRL IN TPS55165Q1-EVM (SLVUAY1) The schematic shows that inorder to enable the Power latch , the jumper should be connected to GND. while in datasheet it says in the pin description of IGN_PWRL:" Logic-level IGN power-latch signal. The IGN pin is latched when this pin is high (1) and is not latched when this pin is low (0). So what is the correct way of connecting this pin ? Problem 2: SS_En The datasheet and EVM document states that: This feature can only be enabled when the device is in normal mode with step-down operation. So if i leave this pin unconnected ( SS enabled ) Does this means that during operation in boost mode ( Vin < 12v) this feature is disable automatically and the device continue working normally ? Or Does it mean that when operating in boost mode ( Vin < 12v) this device will be disable because SS is enabled ? + +Dear Sir. 1. For the feature of IGN_PWRL, please check datasheet "8.4.3 Power-Up and Power-Down Sequences", it is easy for you to understand it; 2. SS_En: Yes, the frequency dithering function only valid in buck mode. The frequency will keep unchanged when Vin you can use 10k-100k ohm, either one is OK. b) you didn't acknowledge why does the EVM has Latch jumper connect to GND , to enable this feature . --> Sorry for the confusion, this is a mistake in the schematic. It should be marked as unlatch. 2. SS_EN , when you said " The frequency will keep unchanged when Vin Yes, the device will work properly but at a fixed frequency. + diff --git a/data/text/DLP1/899614 b/data/text/DLP1/899614 new file mode 100644 index 0000000000000000000000000000000000000000..5bab2d43a42ae136da0511d23d57dec9f44caceb --- /dev/null +++ b/data/text/DLP1/899614 @@ -0,0 +1,10 @@ +TPS55332EVM: How we calculate C10 and R10 value for loop stability? + +Part Number: TPS55332EVM Hi team, Could you tell me how we calculate and modify C10 and R10 value for loop stability in TPS55332EVM datasheet? I added large input capacitor (for Vbat) and large output capacitor (for Vout). Then TPS55332EVM does not work and COMP pin oscillated. I guess it is due to loop stability. Regards, Ochi + +Hi Ochi-san, I notify our expert who is in a different time zone where is already the weekend now. The datasheet gives instruction of these component selection in section 8.2.2.8, in which C8 corresponds to C10 of the EVM. R10 is to introduce additional zero but it seems not needed according to datasheet discussion on the example design. Hope this clarifies. Thanks, Youhao Xi, Applications Engineering + +Hello Xi, Could you please explain how we use/understand below figure? I am lack of knowledge for pole, zero, and compensation circuit. Could you give me training resources for them? Regards, Ochi + +Hi Ochi-san, There iscompany online training course at the following link. /control-smps-loop-transfer-functions?keyMatch=LOOP%20COMPENSATION&tisearch=Search-EN-everything You may also refer to a control theory text book to get some fundamental theory. Best Regards, Youhao + diff --git a/data/text/DLP1/899631 b/data/text/DLP1/899631 new file mode 100644 index 0000000000000000000000000000000000000000..44e97f313226bd10b8ddf9c612c794b700c761b6 --- /dev/null +++ b/data/text/DLP1/899631 @@ -0,0 +1,10 @@ +TPS2HB35-Q1: PWM Max frequency + +Part Number: TPS2HB35-Q1 Hello, I'd like to use TPS2HB35-Q1 to control a hydraulic proportional valve. And I'd like to know how is the maximum frequency for PWM My idea is to apply a 1KHz PWM and use internal current sense as the input of a PID to control the current and oil flow through the valve. Thank you for help. + +Hi Leandro, The maximum frequency will depend on your load. I won't be able to give you the proper maximum frequency as I do not have that information. Unfortunately, some calculations show that you won't be able use a 1kHz frequency PWM with this device. If you do need 1 kHz and can provide more information about your load, I can potentially give you a different 2CH device recommendation. + +The actual system work with 2 types of valves, one of 1.2A and other with 3A. It uses a discrete low side with 1KHz of PWM for 1.2A and a lower frequency for 3A valve. The current monitor is done with a shunt resistor and a current sense amplifier. 1- 1.2A Coil Valve 2- 3A Coil Valve I'd like to do the current control with a high side, max current of 4A. I appreciate your recommendation. Thank you + +Hi Leandro, Thanks for the information. If you have just one channel at 1kHz, this will do much better. You'll be able to work with the TPS2HB35-Q1 devices with your 3A valve at 90Hz with your 1.2A valve at 1kHz if you need the 4A limit Another device that could work is the TPS2HB16 if you're ok with a typical current limit of 4.1A. This'll bring your frequency on the 3A to 400Hz. These recommendations are based on calculations you can find in this app note and assumed an ambient temperature of 105C. If you have more information about your load conditions such as ambient temperature that the device will be operating in, I can adjust the calculations for you. + diff --git a/data/text/DLP1/899641 b/data/text/DLP1/899641 new file mode 100644 index 0000000000000000000000000000000000000000..4776943995869d5c438def2591670fbc3bf9335d --- /dev/null +++ b/data/text/DLP1/899641 @@ -0,0 +1,8 @@ +TPS65218D0: TPS65218D0 off-state problem + +Part Number: TPS65218D0 Hello, my customer is using PMIC TPS65218 in their application and it was running well. He switched to the new TPS65218D0 now and got into a problem which stopped the production! The problem is that in a specific configuration when the application is switched off still a parasitic current occurs on the BIAS and DCDC input terminals of the PMIC (see attachment). Now the D0 PMIC is going into the OFF state after a period of 1-20s and states there, no chance leave this state. Only the push button or a reset helps. The non-D0 version wasn't going into this OFF state. - Is there a difference in the D0 and non-D0 version which leads to this problem? - To ensure that the PMIC comes out of the off-state the customer has to make sure that DCDC5 and DCDC6 are also active in the off state. To do so the FSEAL- bit has to be configured. Is this possible withouth a Coil Cell Supply or is the bit reseted in the off-state. Regards, Holger + +Holger, Sorry, but what am I looking at in this scope shot? What pin are you probing and when are you probing it? I don't really have a point of reference here. It would be nice to see PWR_EN pin and at least one DCDCx output voltage in the same capture. If you are saying keeping DCDC5/6 on helps, it would also be helpful to show DCDC5 or DCDC6 (a) when you are experiencing the issue, and (b) when there is no issue. Please use all 4 channels on the scope to provide some context. Leaving the OFF state depends on 4 events: VIN_BIAS > (VUVLO + hysteresis) & (PB low || AC_DET low || PWR_EN = high) In order to determine if the issue you are seeing is expected behavior, I need to know the state of these 4 pins at the time when you expect the PMIC to turn back on. + +Holger, To answer your questions: HS WG-FAE - Is there a difference in the D0 and non-D0 version which leads to this problem? No, feel free to review the TPS65218 (-B1) to TPS65218D0 changes, attached here and also in our FAQ section. 2577.TPS65218xx_Rev_history.pdf HS WG-FAE Is this possible withouth a Coil Cell Supply or is the bit reseted in the off-state. If there is no voltage present on the CC pin, it will reset to 0b automatically after you set to 1b. However, a physical coin cell is not required. You can also use a resistor divider to generate 3V nominal at the CC pin from the main input voltage. 3V = 5V*R2/(R1 + R2) --> R2 = 100k, R1 = 67k + diff --git a/data/text/DLP1/899642 b/data/text/DLP1/899642 new file mode 100644 index 0000000000000000000000000000000000000000..d6237f3c6ee03d8d90d5db704b0df4b46dc1d4c7 --- /dev/null +++ b/data/text/DLP1/899642 @@ -0,0 +1,24 @@ +LM3646: LM3646 + +Part Number: LM3646 Hi Sir, My customer looking for IR LED driver, control by Flash. Could you pls advise if LM3646 is suitable one? Thanks. Vendor OSRAM OSRAM P/N SFH 4725AS A01 SFH 4180S Forward voltage(V) 2.65(@1A), 3.65max 2.95(@1A), 3.3max Usage amount 3PCS 4~6PCS Thanks, Ian. + +Hi Ian, For IR LED driver application with a fast response time requirement, I strongly recommend our LM3643/LM3644(two-channel) or LM36010/LM36011(single channel). Because those device has integrated the IR mode which can respond with the "STROBE" pin very quickly. It means that you put the trigger signal to the "STROBE" pin and it can respond very quickly. BR Sean + +Hi Sean, Some questions as following, IR mode which can respond with the "STROBE" pin very quickly Q. What is the raising and falling time? 2. For SFH 4725AS 3PCS use a LM3644, and a LM36011 is OK. Q. customer will need to use 2 LM3644, and 2 LM36011, if there are two I2C address for each part? 3. There are three mode in IR Mode: Boost, Pass Only, Timeout Q. Timeout mode is not suitable for customer . What is the difference between Boost and Pass Only mode? Thanks, Ian. + +Hi Ian, Here is a great AN that can answer your most questions. /lit/an/snva773/snva773.pdf For LM3644, you can use LM3644+LM3644TT they have different addresses, but for LM36010, there is only one I2C address. Boost mode means it will switch and Vin is not enough to driver output LED under a special current. Pass mode is like LDO mode which means the Vin is higher than Vout and internal switched will not switch. BR Sean + +Hi Sean, We can find the i2c slave address of LM3644(0x63),but cannot find address of LM3644TT. What is the address of LM3644TT? 2. 3PCS SFH 4725AS is OK for driven by LM3644+ LM36011 But SFH 4180S just only can drive 5PCS by LM3644+ LM3644TT +LM36011, do you have any countermeasure? Vendor OSRAM OSRAM P/N SFH 4725AS SFH 4180S Forward voltage(V) 2.9(@1A), 3.4max 2.95(@1A), 3.3max Usage amount 3PCS 6PCS Thanks,Ian. + +Hi Ian, 1. I'm sorry that LM3644TT has the same I2C address with LM3644, But you can try with LM3643 and LM3643A which has the different I2C address wit LM3643; 2. LM3643+LM3643A+LM36011 may be a good solution for 5 pcs LEDs. BR Sean + +Hi Sean, Thanks. Do you have solution for 6PCS IR LED SFH 4180S? Vendor OSRAM P/N SFH 4180S Forward voltage(V) 2.95(@1A), 3.3max Usage amount 6PCScompany solutions ? Thanks, Ian. + +Hi Ian, What's the supply voltage? And how about the LED configuration? All serially connected or can be connected parallelly? I would recommend TPS54201 first. BR Sean + +Hi Sean, Serially is better, but can also consider others. supply voltage is 3.2~5CV. TPS54201 is still the better solution? Thanks, Ian. + +Hi Ian, No, TPS54201 is a buck topology LED driver, for this kind of high current application, usually, it will use buck topology. If you are considering the boost LED driver, it may need a LED controller, from our team, you can try with TPS61500. BR Sean + +Hi Sean, Thanks for information You means use TPS61500 be a solution for 6PCS IR LED SFH 4180S? Thanks, Ian. + diff --git a/data/text/DLP1/899649 b/data/text/DLP1/899649 new file mode 100644 index 0000000000000000000000000000000000000000..b894aa6a6ba1643ed4d4827eec72ec89bb590ea1 --- /dev/null +++ b/data/text/DLP1/899649 @@ -0,0 +1,6 @@ +TPS3890: TPS389018 - MR pin voltage while Vdd is floating/not available + +Part Number: TPS3890 Hello Team, does the TPS389018 have problems if the MR pin get 3.3V while Vdd is not yet getting 3.3V? In particular Vdd and MR voltages, come from two different power supplies. MR gets for short time 3.3V at low impedance (without a pull up resistor), while Vdd is not yet there. By measuring the MR current it looks that only 10uA flows at 3.5V, thus it looks ok. Nevertheless the TPS389018 ESD structure is not clear and is not sure if 10uA will always be that and not higher. Currently a redesign would be needed if a resistor or diode will be added in serie with MR to avoid the problem. can you confirm that 3.3V on MR, without Vdd is not a problem? If a resistor to limit the current is required, to which value must be that current be limited? Thanks for the follow up, SunSet + +Hi Sunset, /MR should be okay being initiated before Vdd. The RESET will then obviously not be impacted by MR until VDD reaches VDD(min), but there should be non-significant amounts of current sink in this case. This case has not to my knowledge been tested by our team however, so I would ask the customer to verify currents on each pin during operation. Since MR does not require a pullup resistor, it should not in this case as well. Let me know if you have additional thoughts. Thanks, Abhinav. + diff --git a/data/text/DLP1/899672 b/data/text/DLP1/899672 new file mode 100644 index 0000000000000000000000000000000000000000..494242aef4f68cf290948273463167fc39acdc45 --- /dev/null +++ b/data/text/DLP1/899672 @@ -0,0 +1,6 @@ +BQ24075: general Questions + +Part Number: BQ24075 Hi we are using a BQ24075 charger and BQ27441 Fuel Gauge for charge and manage the battery in our application. I have some questions please: 1) can we charge the battery with using only BQ24075 charger (without Fuel gauge)? 2) is the BQ42075 able to stop charging of the battery if it is full charged? or we must use BQ27441 Fuel gauge for that? Thank you + +Hello, 1) Yes. You can charge the battery without a gauge. 2) Yes. The battery stops charging automatically when the charge current crosses the termination point. + diff --git a/data/text/DLP1/899687 b/data/text/DLP1/899687 new file mode 100644 index 0000000000000000000000000000000000000000..683df2c5ba7504478fd0e2dd16aa740083c31efa --- /dev/null +++ b/data/text/DLP1/899687 @@ -0,0 +1,6 @@ +TPS543C20A: A couple of general questions + +Part Number: TPS543C20A Hello, I have a couple of questions about TPS543C20A as follows. Q1: Datasheet says KIND must be kept between 0.1 and 0.3 for balanced performance. However, KIND can be 0 – 200% at WeBench. If KIND is > 0.3, for example KIND is 2.0, what would be wrong? Q2: IOCP is defined as the valley inductor current? So, actual maximum DC current limit is IOCP + 1/2*(Inductor current ripple)? Best regards, K.Hirano + +Hi Hirano-san, A1: Higher Kind, or lower inductor value, is often desirable to allow a physically smaller inductor to be chosen and to improve transient response, since it is easier to slew the inductor current in response to a load transient step with lower inductance. However, lowering the inductance increases the inductor current ripple which will lead to higher output voltage ripple and require more output capacitance to reduce. In addition, the higher inductor current ripple can mean higher AC/core losses, though that may be offset by the lower DCR of smaller inductance. The inductance also shouldn't be so small that the peak current hits the fixed high-side short circuit protection fault threshold (IHSOC) and negative valley current limit (IOCP_N) in normal conditions. A2: IOCP is defined for average inductor current, not valley current, at which OCP will trigger. Equation 3 is subtracting half the inductor current ripple from the peak current limit defined by RILIM resistor. Regards, Kris + diff --git a/data/text/DLP1/899689 b/data/text/DLP1/899689 new file mode 100644 index 0000000000000000000000000000000000000000..75ac3ded9e1507ffc8ece7f3aa821441b2d0aab5 --- /dev/null +++ b/data/text/DLP1/899689 @@ -0,0 +1,6 @@ +BQ28Z610: Reading OperationStatus MAC (0x0054) after seal/unseal minimum delay specification. + +Part Number: BQ28Z610 I am performing seals/unseals of the device and upon querrying the OperationStatus MAC (0x0054) after the read to validate the SEC0 SEC1 states to determine the seal/unseal state I require a delay. The minimums I have found are 100ms for seal and 500ms for unseal. The interesting thing is that I have 3 retries on the seal/unseal and the read back of the OperationStatus SEC1 SEC0 . So it seems even if you write the seal/unseal with no state change (sealing a sealed device or unsealing an unsealed device) the security status bits still go into some state of flux. Can you confirm the minimum propagation delay for stable SEC1 SEC0 in OperationStatus after a seal and an unseal is performed? + +Hi John, I don't think we have a spec for that. I suggest you use some empirical data, like what you have found. Andy + diff --git a/data/text/DLP1/899692 b/data/text/DLP1/899692 new file mode 100644 index 0000000000000000000000000000000000000000..c4f8be7f9a67c43ebe24dcba590b312fb05d7b25 --- /dev/null +++ b/data/text/DLP1/899692 @@ -0,0 +1,10 @@ +TPS22916: PSPICE .tsc file missing + +Part Number: TPS22916 Hi Team, Good day. My customer is looking for the .tsc file of TPS22916C, do we have this file? Thanks in advance. Regards, Renan + +Hi Renan, Welcome to E2E! The .tsc file is for a TINA-TI schematic with the model. For this device a TINA-TI schematic with a model was not created. What is available in the product folder is the PSPICE models for use in the PSPICE software tool. Best regards, Andy Robles + +Hi Andy, Thank you for this response. I apologize for the subject of this e2e thread, it is my mistake of adding the word PSPICE. It seems that my customer will stick to what is available on the website. He really wanted to have the .tsc file for TINA if possible. Regards, Renan + +Hi Renan, I understand. Unfortunately we did not create the TINA model, but the PSPICE documents should help with all modeling needs. Best regards, Andy Robles + diff --git a/data/text/DLP1/899699 b/data/text/DLP1/899699 new file mode 100644 index 0000000000000000000000000000000000000000..ef14eb1650ef2c0e2538cb6009bf4d277b7c2b50 --- /dev/null +++ b/data/text/DLP1/899699 @@ -0,0 +1,8 @@ +LM5122: Lm5122 + +Part Number: LM5122 I want use Lm5122 with boost converter. I have voltage input 3v and input current 50 ampere. My output voltage is 24v (battery) with output current 6.25. I want make several dc-dc converter by using LM5122. How I can connect them together. Is there any recommendations or tip for this specification + +Hi Heda, LM5122 supports interleaved, and multiple-phase configuration. You can see this in LM5122 datasheet section 8.1.3, with figure 31, 32, and 33. Thanks, Richard + +Thanks for your help. I will look for your tips. + diff --git a/data/text/DLP1/899700 b/data/text/DLP1/899700 new file mode 100644 index 0000000000000000000000000000000000000000..d0e8d3bae5598d5ec57719db3129a185113f6ba7 --- /dev/null +++ b/data/text/DLP1/899700 @@ -0,0 +1,6 @@ +LMZ14203H: Need worst case Gain/Phase margin analysis including temperature range and EOL aging + +Part Number: LMZ14203H Hi Power Team! My customer has an LMZ14203H circuit and needs to know the worst case stability over the following conditions: 1. Vout : 12V 2. Load: Nominal 0.2A, Max: 0.75A (if going in pulse skipping, what freq and ripple voltage) 3. Vin: 24V 4. Worst case phase margin (temp (-40deg to 85 deg, aging – BOL, EOL) 5. Worst case Gain margin (temp (-40deg to 85 deg, aging – BOL, EOL) 6. Input filter: Pi filter : 22uF – 10uH -22 uF (X7R caps) 7. Output filter: 3*10uF IIel 22uF (All ceramics) Can you help with this analysis? I don't know how to configure the WEBENCH Power Designer Tools to provide the needed stability analysis with these components. Best regards, Jim B + +Hi Jim, This request sounds like quite a bit of bench test including thermal stream control. I don't think there is a way to simulate this. Webench does not account for thermal shifts. As note that thecompany Santa Clara site is still close for the upcoming pandemic future. Because of this, I have limited to almost no access to the lab. I would suggest providing the customer with an evaluation board to test their specific condition. I would also like to mention that the part is expected to be stable as long as the output capacitance and ESR range are met over temperature. The table in Figure 43 provides the typical recommended component selection, capacitor ESR, and input/output range for a stable operation. Regard, Jimmy + diff --git a/data/text/DLP1/899715 b/data/text/DLP1/899715 new file mode 100644 index 0000000000000000000000000000000000000000..1ccdc4d5af8fdf9be97fa76dcdec342c0b3306a8 --- /dev/null +++ b/data/text/DLP1/899715 @@ -0,0 +1,6 @@ +TPS3808: Minimum VIT pin Hysteresis + +Part Number: TPS3808 Hi Team, Do we have data on the VIT pin minimum hysteresis? This is for the G01 variant. Our customer needs this for proper determination of voltage limits within their power supply design. As far as I know hysteresis generally do not vary that much from the nominal value. Do we have data for a more defined minimum value? Thanks in advance! Kind Regards, Jejomar + +Hi Jejomar, We do not specify minimum hysteresis for this device, and in general for a lot of our devices. In this case, as you can see by the variation of the maximum band, minimum hysteresis is "theoretically" zero. You're right in assuming that hysteresis does not usually vary much itself, it is rather a factor of the variation of the voltage level. Due to this, we also do not have characterization data on the subject. We do not guarantee any sort of minimum hysteresis for the TPS3808. We do spec it, however, on the similar TPS3890. Thanks, Abhinav. + diff --git a/data/text/DLP1/899720 b/data/text/DLP1/899720 new file mode 100644 index 0000000000000000000000000000000000000000..602a18e8ef536c34d49867623d93899bd67351f9 --- /dev/null +++ b/data/text/DLP1/899720 @@ -0,0 +1,6 @@ +CCS/IWR6843ISK-ODS: IWR 6843 ISK-ODS Device: Booting issues + +Part Number: IWR6843ISK-ODS Tool/software: Code Composer Studio Hi, I am using the IWR 6843 ISK - ODS device for more than 2 months. There is booting issues with the Sensor, after flashing the .bin image. When i run the Demo Application(matlab GUI ),sensor start is not happening and it is not provided the frame Numbers. And one more issue is, antenna color has changed due to more heat. Attaching the sensor image below FYI. Here i will attach the power supply image also. Please guide me whether this power supply range is sufficient or more than that. Help me out to resolve the problem. -Regards, Priyanka. + +Hello Priyanka, Board image you have posted is not of IWR6843ISK-ODS but regular IWR6843ISK, It need to be plugged with MMWAVEICBOOST board to work. Power adapter used seem to be fine. Is the problem is present on IWR6843ISK or IWR6843ISK-ODS board? Could you please post the image of the both the boards together under powered on condition when it does't work? Does out of box demo application run correctly? Thanks and regards, CHETHAN KUMAR Y.B. + diff --git a/data/text/DLP1/899721 b/data/text/DLP1/899721 new file mode 100644 index 0000000000000000000000000000000000000000..0445d107fa40d87487c07519f0e5dea9819cd175 --- /dev/null +++ b/data/text/DLP1/899721 @@ -0,0 +1,10 @@ +AWR1642BOOST: +DCA 1000 EVM ::::: Use of USB and Ethernet extension cables + +Part Number: AWR1642BOOST Hi, I am using a AWR1642BOOST + DCA1000 EVM. I am collecting raw 2x complex ADC data through these two EVMs and I am using mmwave Studio 2.0.0.2 also. There was some problem of getting LVDS data from DCA 1000 EVM on Ethernet cable on my old laptop. Therefore, I bought a 100/1000 Gigabit Ethernet adapter (with USB hub). Now I have a newer laptop but I prefer to use USB hub with Gigabit Ethernet adapter for less hassle in the experimental setup. I have plugged-in the following in the USB hub + Gigabit Ethernet adapter (2 in 1) - One TI-provided USB cable from AWR1642BOOST EVM - One USB cable from DCA1000 EVM (dont remeber if it came with a USB cable or not ? - One TI-provided ethernet cable from DCA1000 EVM There is one single USB cable (15cm) output going from the above USB + Ethernet hub, into my laptop and things are working fine. I wish to extend the length of this above USB cable from USB hub to my laptop. My questions are : 1) Considering that I am already using a USB hub (with built in gigabit ethernet adapter) with 15cm USB cable, how much maximum length of additional USB extension cable I can use without (severely) effecting signal integrity ? 2) What is the trade off on LVDS transfer rate of DCA1000EVM (maximum is 600Mbps) , when using the ethernet cable in a USB hub instead of directly using it in the ehternet (Rj-45) adapter of laptop ? 3) Is there a speed and / or signal integrity trade off if the two USB cables (one from AWR1642BOOST and one from DCA1000) are used as: --- 2 USB cables used in single USB slot of laptop through a USB hub ---- 2 USB cables used in a USB hub with builtin additional gigabit ethernet adapter Thanks and regards + +Alper, I would need to see a picture of your physical setup. A setup using a USB hub that includes a Gigabit Ethernet adapter has not be verified by TI, so there is no guarantee that this setup would even work. The setup for the DCA1000EVM is specified in the User's Guide and the DCA1000EVM Quick Start Guide. Quick Start Guide: /lit/pdf/spruik7 User Guide: /lit/pdf/spruij4 Regards, Kyle + +Hi Kyle, I am attaching the picture of the setup. Please have a look at it and then please read my questions again. I hope you will understand my query better. This setup is working fine as far as I think and as far as I am experiencing. Then, please advise about question 1, 2 and 3 of my above post. Thanks and regards. + +Alper, The underlying issue is that you are attempting to use a setup thatcompany has not verified so we cannot comment at this time on the various trade offs you are asking about. The recommend setup for using the DCA1000EVM is as follows: - 2 USB cables (each plugged into a different USB port on the PC) - 1 Ethernet cable (plugged into the RJ-45 connector on the PC) I have used 15 foot USB cables in the past without issue. I have also used a similar length Ethernet cable without issue. Regards, Kyle + diff --git a/data/text/DLP1/899743 b/data/text/DLP1/899743 new file mode 100644 index 0000000000000000000000000000000000000000..a3ee7ad03b3756cf48e2482143f5c15fb4a9cb77 --- /dev/null +++ b/data/text/DLP1/899743 @@ -0,0 +1,6 @@ +AWR1642: Raw data transfer without DCA1000 + +Part Number: AWR1642 I am seeking to capture raw data and transfer it to MATLAB for post processing & analysis. Is this possible without using additional hardware such as the DCA 1000 or TWR ? + +Hello Shawn, Currently there are no other ways to capture the raw ADC data from AWR1642 than using DCA1000/TSW1400. Regards, Jitendra + diff --git a/data/text/DLP1/899755 b/data/text/DLP1/899755 new file mode 100644 index 0000000000000000000000000000000000000000..0da4a7e6509a539bbde234968ddbde2a40ebd782 --- /dev/null +++ b/data/text/DLP1/899755 @@ -0,0 +1,10 @@ +TL1963A: Thermal design help + +Part Number: TL1963A Customer wants to convert Vin = 10.8V to 13.2V to Vout = 9V using multiple TL1963A. Output load = 1.2A. Tambient = 45degC. One approach is to cascade two TL1963A LDOs (in KTT package) in series to share the power dissipation. Both LDOs would share a thermal pad on the topside of the board just large enough to encase the two packages. The pad would have about 20 thermal vias down to layer 7 of an 8 layer board. Layer 7 is almost all ground plane (>2500 sqmm). An alternate approach would be to use three TL1963A devices in parallel to share the load. All three would handle the full In/Output drop, but would output to different circuits so no load ballast is required. Each LDO would handle about 400 mA load current. Topside thermal pad would be just large enough to hold all three LDOs. Which approach would we recommend? Customer would like to get away with just two LDOs for area reasons. Seems like using three LDOs would reduce junction temp of the LDOs, but may be largest solution considering size of device and needed input/output caps. Its not clear how to model the thermal plan of the PCB. Will the thermal vias be enough to keep the topside thermal pad at a reasonable temp? + +Hey Mark, It's great to hear they are already planning for multiple thermal vias, this is often missed by customers and has a significant effect. If the max ambient temperature is 45C, then they can probably get away with two LDO's in series. I'd recommend setting the first Vout to 10.2 so the min Vin-Vout=600mV which would keep it out of dropout and will reduce the power dissipation of the first stage when Vin increases to 13.2V. So using worst case we'd have 2.4W of dissipation (1.2A*[13.2V-10.2V]) and the Rja is 32.9C/W for the JEDEC high-k board. So using Tj=Ta+Pd*Rja this would result in a max junction temperature of 124C keeping it just below the max operating temp. However, the description of their board sounds like it'll probably be better than the JEDEC high-k board and we have data showing that with a good thermal layout the Rja can be reduced by ~30% (see this app note if you're interested). While it would be better if the thermal vias were electrically connected to more metal, if the internal layers have a large amount of metal in and around the vias that metal will still help offload heat. Assuming the 30% improvement would result in a max junction temp of 99C. So their max junction temp should be between 99C-124C, keeping them within the specification. The last thing to consider is how often the LDOs are going to be running at these extended temperatures (this would be a combination of how often the 1.2A at Vin=13.2V is being applied and how often the ambient temp is at the max of 45C). Catalog IC's are qualified using the JEDEC standards JESD22-A108 and JESD85 which ensures IC's can operate at Tj=55C for approximately 9 years but the lifetime decreases as the temperature increases (which is often overlooked). Just to give you a sense of the effect junction temp has on IC lifetime below is a graph showing the minimum lifetime vs junction temp based on the JEDEC standards. Let me know if you have any other questions. + +Hi Kyle, Thanks for the thorough analysis and comments. This is really helpful. However, there may be an error in the calculations. Under the worst case of Vin = 13.2V, the power dissipation in the first LDO would be 1.2A(13.2-10.2) = 3.6W instead of 2.4W. Under the RjA assumption of 32.9 degC/W, this results in a much higher junction temp (163C). Even with a 30% improvement in Rja, the junction temp might exceed 125C. Did I overlook something when I was going through this? + +Hey Mark, Sorry about that, some how I made a silly error and miscalculated the power dissipation, you are right it should be 3.6W which takes it ~1 degree beyond the rated junction temperature (126C) even with the best PCB layout case. So if they really optimize the board for thermals they'll be right at or above the max junction temperature which wouldn't really result in much of a difference from a performance point of view however it makes the comments I made previously on minimum lifetime even more relevant. So they'll need to do the analysis themselves to determine how they'd like to proceed however I'd suggest going with the three parallel LDOs. This topology would burn 1.2W of power dissipation per LDO and if we assume the PCB is only as good as the JEDEC board then we'd expect a max junction temp of ~83C so there is a significant amount of margin with this design. + diff --git a/data/text/DLP1/899758 b/data/text/DLP1/899758 new file mode 100644 index 0000000000000000000000000000000000000000..dd411f4d1b729d1f975d3a8024f31c917de18ea0 --- /dev/null +++ b/data/text/DLP1/899758 @@ -0,0 +1,10 @@ +LP38798: Minimum Iout Required? + +Part Number: LP38798 Is there any minimum current output requirement for this device? I don't see this specifically addressed in the data sheet. Appreciate your help. + +Hi Duncan, I have reviewed the datasheet. The datasheet does not specify a minimum load current for the part to work, but the product specification table and characteristics curves were all taken at higher than 10mA. If your load current is higher than 10mA, you should be good; if not, to achieve the datasheet performance, you will need to burn additional power to have at least 10mA of load current. Regards, Jason Song + +Jason, Thanks for the quick response. In normal use we will always be above the 10 mA (more like 100 mA or above) threshold so that should be OK. There are some circumstances where the external load would not be connected so we just want to make sure that's not an issue. Without the load connected we're really not too concerned about the output performance but want to make sure it's not an issue for the LP38978. Sounds like this should be OK. Thanks - Duncan PS - I like this answer better than the other one for the LP5907 input voltage headroom :)! + +Lol, thank you. It should be fine as your stable load condition is higher than 10mA. Thanks for your feedback on the LP5907 one; if you have any concerns or additional questions, please do not hesitate to let me know. + diff --git a/data/text/DLP1/899766 b/data/text/DLP1/899766 new file mode 100644 index 0000000000000000000000000000000000000000..8e46e60ba2a2ed074b72bad8eae28a5f09b9c036 --- /dev/null +++ b/data/text/DLP1/899766 @@ -0,0 +1,6 @@ +LP5907: Minimum Vin for 4.5V Vout? + +Part Number: LP5907 We have an application where we are considering the LP5907 as a low-noise supply for a 4.5V rail with a 20-40 mA load. The input voltage is planned to be 5V which appears to meet the 250 mV max drop-out voltage spec. However in the data sheet there is an application note (section 9) "To ensure that the LP5907 output voltage is well regulated and dynamic performance is optimum, the input supply must be at least VOUT + 1 V." If that is true then we would need at least a 5.5V supply input. The +1V statement appears to conflict with a specified maximum drop-out voltage of 250 mV. Can you clarify the input voltage requirement? Thanks - appreciate your help. + +Hi Duncan, The headroom between Vin and Vout needs to be higher than the dropout for the LDO to regulate, but the higher margin is needed to achieve good PSRR and noise performance. That's why we recommend having higher than dropout headroom. Regards, Jason Song + diff --git a/data/text/DLP1/899768 b/data/text/DLP1/899768 new file mode 100644 index 0000000000000000000000000000000000000000..9321f4e63d9abe917a22b944260f7a1a4a48042c --- /dev/null +++ b/data/text/DLP1/899768 @@ -0,0 +1,8 @@ +BQ25618EVM: Charge Current higher than specified + +Part Number: BQ25618EVM Hello everyone! I am using a BQ25618EVM charger IC for Li-ion battery charging. While testing the IC using an electronic load instead of a battery and setting the input current via the EV2400 I2C interface, I found that when I set the charging current to 60 mA using BQStudio, the measured current supplied to the electronic load is 80 mA. This trend existed even when I increased the current until 160 mA. However, upon increasing the current beyond 200 mA, the measured and set current values matched again. Also, when I set the current to 40 mA, the measured current was recorded as 40 mA. I have multiple units of BQ25618EVM and I found this issue only with 2 out of 10 units. Also, I tried testing these ICs again using actual batteries and the same trend existed. Moreover, I checked the startup register settings of this IC, and it matched the default settings mentioned in the BQ25618 IC datasheet. So why is the measured current different than the set current in some of the ICs? Please let me know how I can troubleshoot this issue. + +Hi Ved: I think this could be setup issue. Did you use electronic load alone to simulate battery? When you do that, do you have additional power supply in parallel? Need to understand more about your setup. When you use real battery, how did you measure charge current? What is the battery voltage? Adding resistance between the charger and battery may reduce charge current. Regards, Hong + +Yes, I only used a constant voltage electronic load to simulate the battery. The voltage was set to 3.7 V which is the operating voltage of the battery. The voltage range of the actual battery is 3 to 4.2 V. With the battery connected, I measured the charge current using a DMM and also using a current sensor. This same setup when tested with other units of BQ25618EVM in my possession do not show a higher measured charge current when I set the registers to 60 mA. + diff --git a/data/text/DLP1/899771 b/data/text/DLP1/899771 new file mode 100644 index 0000000000000000000000000000000000000000..b0bca449824da3dc2e6033c07bd909ddfa889a7a --- /dev/null +++ b/data/text/DLP1/899771 @@ -0,0 +1,8 @@ +BQ79606EVM-897: CAD Files + +Part Number: BQ79606EVM-897 Hi, Are Altium design files for this evaluation kit available? Regards, + +Hi Huss, I will check on why the EVM files are not in the folder, but in the meantime you can use the reference design guide files for our reference design: /tool/TIDA-01537. Regards, Taylor + +Thanks Taylor. + diff --git a/data/text/DLP1/899773 b/data/text/DLP1/899773 new file mode 100644 index 0000000000000000000000000000000000000000..3d276d4f8b2ecb530337221df90a3f5de8d7c24c --- /dev/null +++ b/data/text/DLP1/899773 @@ -0,0 +1,6 @@ +BQ24072T: Confirm if BQ2407xT family IC can be used for harvesting purposes + +Part Number: BQ24072T Hi Team, Our customer would like to confirm if our BQ2407xT family IC can be used for harvesting purposes. The intention of harvesting in the customer application is to supply a device with a battery and use solar panels to charger it. The customer is aware that this device has no feature for harvesting but would to confirm if he connects a solar panel in the BQ2407xT input, the battery will be charged with any problem? If the device above and the customer design plan is not possible above, do we have an IC that can suits the customer requirement below: 28V input voltage, power path and battery charger features with 5V/3A output The nearest possible I saw so far is BQ24650. But base on the customer, if he will be using BQ24650, the questions is, do they have to add some circuitry to supply their load with battery while it chargers? Let me know if you need clarification in the above inquiry. Thanks! Jonathan + +Hello, The BQ24072T can be used with an energy harvesting device as long as the energy harvester can supply 5V to the input. + diff --git a/data/text/DLP1/899777 b/data/text/DLP1/899777 new file mode 100644 index 0000000000000000000000000000000000000000..691d3b2abff567f98c8314cf2c12447d8ff2e5bf --- /dev/null +++ b/data/text/DLP1/899777 @@ -0,0 +1,10 @@ +MMWAVEICBOOST: JTAG connection through XDS110 USB port + +Part Number: MMWAVEICBOOST Hello , According to mmwave_sdk_68xx_hwa_user_guide.pdf, JTAG connection seems available through XDS110 USB port. I would like to connect JTAG through the USB port if it is possible to connect with just USB cable. Best regards, Taka + +Hi, Can you clarify your question? The JTAG connection is already through the USB cable. BR, Charles O + +Hello Charles, We have ordered TMDSEMU110-U but it would take some weeks for the delivery currently. I am wondering if it is possible to communicate JTAG through J11 USB port (w/o the JIG). If it is possible, we could start debugging before the JIG is arrived. Best regards, Taka + +HI, You can debug using the MMWAVEICBOOST which i assume you already have. Please see link below for steps on debugging the OOB demo using the MMWAVEICBOOST BR, Charles O + diff --git a/data/text/DLP1/899778 b/data/text/DLP1/899778 new file mode 100644 index 0000000000000000000000000000000000000000..b09f9593750425b874cb722e418b0fb8d7121b0d --- /dev/null +++ b/data/text/DLP1/899778 @@ -0,0 +1,6 @@ +UCC25600EVM: HAP410A DRAWING + +Part Number: UCC25600EVM Is there an available drawing for HPA410A ? It looks like the daughter card has a VDD ref... where does it come from ? Thanks, Ralph + +Ralph Figure 26 (page 17) of the UCC25600EVM User Guide /lit/ug/sluu361a/sluu361a.pdf is the schematic and Figure 24 and Figure 25 (page 16) are the copper layers for HPA410 daughter card. You can refer to the pin designators on Figure 1 (page 4) schematic to determine how the various pins are connected. Please note that UCC25600EVM comes default populated with diode rectifier, so the logic VDD, GND and SYNC pins are not needed. If the HPA410 daughter cards are replaced with an SR controller like UCC24624 or UCC24612 then these logic pins would be used. Best Regards, Eric + diff --git a/data/text/DLP1/899779 b/data/text/DLP1/899779 new file mode 100644 index 0000000000000000000000000000000000000000..7a2d279bc11e909a8b8546fe91e0b38d3171217d --- /dev/null +++ b/data/text/DLP1/899779 @@ -0,0 +1,6 @@ +[FAQ] TMP61/TMP63/TMP64 - Can the TMP61, TMP63, TMP64 be soldered to an Aluminum PCB (IMS)? + +Can the TMP61, TMP63, TMP64 be soldered to an Aluminum PCB (IMS)? + +Aluminum PCB's (so called IMS, Insulated Metal Substrate) have different mechanical stretch properties when compared with FR4 PCB's. This leads to an effective method of heat dissipation across the circuit board. Circuit designers may find difficulty selecting SMD components that do not crack after reflow due to the different thermal expansion. However, the DYA (0603) package of the TMP6x family of devices can be used for the application. The DYA package can be soldered on IMS because the package leads have a tendency to allow for flexing. There still needs to be consideration to the layout. Care should be taken to have a balanced amount of copper on either sides to ensure one side does not cool much faster than another and to have proper thermal expansion. + diff --git a/data/text/DLP1/899789 b/data/text/DLP1/899789 new file mode 100644 index 0000000000000000000000000000000000000000..0e09d9de60d8effedc0df501526fc30241ed6831 --- /dev/null +++ b/data/text/DLP1/899789 @@ -0,0 +1,8 @@ +BQ35100: Does Lifetime Data Collection work in Accumulator mode? + +Part Number: BQ35100 I'm trying to get Lifetime Data Collection to work while gauging in ACC mode, to get a simple view of voltage sag during a short current spike. I have not yet configured EOS mode. LF_EN is 1 in Operation Config A LT_EN command was sent (0x002E) LTEN bit is set in CONTROL_STATUS I turn the gauge on for ~4 seconds then turn it off, wait til G_DONE is set and read the LTFlash registers, and they do not move from their default values. + +Bill, Yes lifetime should work in ACC mode. When you say "turn it off" are you issuing the Gauge stop command. Lifetime is only committed to flash when the gauge stop command is issued, Thanks, Eric Vos + +Thanks for the fast reply. Several features don't work (or work differently) in ACC mode, so I'm glad I asked. Upon further investigation and increased logs, I discovered I'd left a debug flag on in our firmware which never issued GAUGE_STOP. Embarrassing, but great to have a resolution! + diff --git a/data/text/DLP1/899790 b/data/text/DLP1/899790 new file mode 100644 index 0000000000000000000000000000000000000000..ca5721a0de7bda70443530be48b08182bd8c888d --- /dev/null +++ b/data/text/DLP1/899790 @@ -0,0 +1,6 @@ +LMR34215-Q1: How to measure the IQ-nonSW ? + +Part Number: LMR34215-Q1 Hi We are using LMR34215FSC5RNXRQ1, may i know how to measure the IQ-nonSW (the test set up) ? + +Hi PY, You need to use a DC power supply to bias Pin7 FB at any voltage between 1.2V--3.3V, then measure input current on VIN pin B R Andy + diff --git a/data/text/DLP1/899799 b/data/text/DLP1/899799 new file mode 100644 index 0000000000000000000000000000000000000000..94444c62e7d122995f0ee0d4df1a628c1895e0e9 --- /dev/null +++ b/data/text/DLP1/899799 @@ -0,0 +1,10 @@ +TPS544C20: mask setting issue in power image + +Part Number: TPS544C20 About mask setting in TPS544C20 power image: Dongle downloading: There is a setting to mask SMBALERT(MFR_23), I checked some boxes in the image and downloaded it to the controller by the dongle. But after power cycle, I read the configuration, there is no mask except EEPROM backup. We want to check if it’s the correct logic for TPS544C20, after power cycle MFR_23 refresh again. Thanks, Haojie + +haojie tian The only bit in MASK SMB ALERT that has NVM support is the Enable Auto ARA bit. All other MASK bits will revert to their default "0b" setting during Power On Reset. If you are looking for a device with NVM support for the SMB_ALERT mask functions, consider the TPS544C25, TPS546C23, or TPS546D24A + +Got it, thanks Peter ! + +haojie tian You are most welcome. I am glad that I could help. + diff --git a/data/text/DLP1/899800 b/data/text/DLP1/899800 new file mode 100644 index 0000000000000000000000000000000000000000..829a52f47e2612e71ffde1123a14ab263526d753 --- /dev/null +++ b/data/text/DLP1/899800 @@ -0,0 +1,6 @@ +TPS92515AHV-Q1: difference with TPS92515HV-Q1 + +Part Number: TPS92515AHV-Q1 Hi, I got a request from my customer to recommend a solution for automotive fog lamp driver, powered by 24V bat, 4*LED with 1.1A output current. I am considering to position TPS92515HV-Q1 or TPS92515AHV-Q1, could you let me the difference and what are the impacts for customer's design? Thanks. Dongbao + +Hello Dongbao, The TPS92515HV has a turn-on calibration which will make the current regulation set-point more accurate. The downside to this is during power on, on some devices near the 5 mV threshold it can be set to one current or another, basically a bit changing in the turn-on calibration. This will cause a 5 mV change in the current sense regulation point. At full current this is fairly insignificant. If deep analog dimming it can become noticeable during power cycles. The TPS92515AHV removes this calibration circuit so it will always power on at the same set-point. The set-point accuracy will we lower with this part since it is not calibrating during turn-on. The advantage for this is at low dimming, while not as accurate, it will not change during a power cycle. Look at the regulation accuracy between the two parts in the datasheet. It depends on what is preferred for their design. The good thing is the layout is the same for both so they can both be tested. Note that the bit changing during power on is a small percentage of parts where the IC operation is near a bit change during turn-on, most parts will not do this. Best Regards, + diff --git a/data/text/DLP1/899801 b/data/text/DLP1/899801 new file mode 100644 index 0000000000000000000000000000000000000000..30ed48b35883227dc8c51618808e2afd20a22c52 --- /dev/null +++ b/data/text/DLP1/899801 @@ -0,0 +1,6 @@ +CSD19536KTT: Recommended operating condition Junction tempertature.. + +Part Number: CSD19536KTT Hi, CSD19536KTT - Data sheet does not specified "the recommended operating Conditions Junction temperature value". Please provide the value. Note:- In Datasheet maximum junction temperature specified in absolute maximum value only. Regards, Venkata Seshathri.S + +Hello Venkata, Thanks for the inquiry. You are correct. The maximum specified operating junction temperature for the CSD19536KTT is 175degC. Typically, you would not operate the device at this temperature continuously and would want to derate for reliability purposes. The exact amount of derating is based on the customer requirements. Typically, I have seen derating in the 15degC to 25degC range from TJmax specified in the datasheet. As a general rule of thumb, the FIT rate is reduced approximately by half for every 10degC reduction in temperature. + diff --git a/data/text/DLP1/899804 b/data/text/DLP1/899804 new file mode 100644 index 0000000000000000000000000000000000000000..2bab09b3eab6f6441d534cb4a6de5ec66953f49f --- /dev/null +++ b/data/text/DLP1/899804 @@ -0,0 +1,8 @@ +IWR6843ISK-ODS: Sensors forum + +Part Number: IWR6843ISK-ODS i am following the people counting lab to do some experiments, but i meet some problems. i want to know whether the 68xx_3D_people_counting demo support IWR6843ODS, or it only support IWR6843ISK ? + +。 + +Yes, it runs on ISK or ODS, as described in the user's guide. Regards, Justin + diff --git a/data/text/DLP1/899809 b/data/text/DLP1/899809 new file mode 100644 index 0000000000000000000000000000000000000000..ea5471cb540f539d8340f52a75f0dc00cc54cc71 --- /dev/null +++ b/data/text/DLP1/899809 @@ -0,0 +1,8 @@ +TPS63802: Step file request + +Part Number: TPS63802 Is it possible to get a step file(3D Model) of TPS63802? + +Hi Lakshminarayana, Attached is the step file. Let us know if you need further help. DLA0010A.stp Best regards, Milos + +Thank you, Milos. + diff --git a/data/text/DLP1/899813 b/data/text/DLP1/899813 new file mode 100644 index 0000000000000000000000000000000000000000..7dcb1da62aee9adbed25c3610f7df1a849e50eaf --- /dev/null +++ b/data/text/DLP1/899813 @@ -0,0 +1,6 @@ +BQ30Z554-R1: BQ30Z55DBTR-R3 + +Part Number: BQ30Z554-R1 Hi Team, May I know the change list of BQ30Z55DBTR-R3 between R1? Are there any ECN? My customer is applying R3 version in their project, but I cannot find BQ30Z55DBTR-R3 information on . Please kindly help. Thanks and best regards, Jamie + +Hello Jamie, This is a custom part number, please go through business team. + diff --git a/data/text/DLP1/899816 b/data/text/DLP1/899816 new file mode 100644 index 0000000000000000000000000000000000000000..44eb3a672e181a91d6b1823d17d2852bf7da8129 --- /dev/null +++ b/data/text/DLP1/899816 @@ -0,0 +1,6 @@ +AWR1443BOOST: the size of adcData? + +Part Number: AWR1443BOOST i follow the guide and i use matalb code to read adc_data.bin why the size of adcData become 4*262144 ? i know the ''4''meaning ,they have four Rx and i get chirp ADC_sample is 256 so 262144/256 =1024 ,this might be the number of chirp i think is my idea right? if yes,where to set the number of chirp in mmwave studio? and if i get the first 256 samples >>>> like this adcData (1:4,1:256) %% i know the chirp is emanated by Tx0 and Tx1 tx1 phase difference in Rx is like [0w 1w 2w 3w] tx2 phase difference in Rx is like [4w 5w 6w 7w] if i want the angle of target ,how to use Φ = 2π/λ ΔR = 2π/λ dsinθ i mean that if i take tx0 and tx1 Φ will be 1w-0w or 5w-4w or 5w -0w or 1w-4w ,and the answer will be different . How to fix it? + +The ADC file size is determined by the following calculation: ADC_Data_Size_per_Frame = sizeof(real_part) * sizeof(imaginary_part) * num_adc_samples * num_chirps * num_TX * num_RX The assumption here is that you configure the ADC in Complex Mode. The real and imaginary values are each 2 bytes. When configured in complex mode, each sample will have a size of 4 bytes. When configured in real mode, each sample will have a size of 2 bytes. The key parameters that determine the file size are: ADC mode (complex or real mode) - this means either 4 bytes or 2 bytes per sample Number of ADC samples per chirp Number of chirps per frame Number of TX antennas Number of TX antennas Regards, Kyle + diff --git a/data/text/DLP1/899819 b/data/text/DLP1/899819 new file mode 100644 index 0000000000000000000000000000000000000000..4254a5c60a75cb2f69e67ce46c7d585bb12f7dc4 --- /dev/null +++ b/data/text/DLP1/899819 @@ -0,0 +1,6 @@ +TPS562201: RDS_ON @ Ta = 120℃ + +Part Number: TPS562201 Hi Team, Could you kindly share the value of RDS_ON @ Ta =120℃ ? Thank you and best regards, Michiaki + +Hi Michiaki, Please refer to Figure 5 and 6 of the TPS562201 datasheet. + diff --git a/data/text/DLP1/899825 b/data/text/DLP1/899825 new file mode 100644 index 0000000000000000000000000000000000000000..521eaf455961267a52eff41ee5256f5b3b878743 --- /dev/null +++ b/data/text/DLP1/899825 @@ -0,0 +1,6 @@ +IWR6843ISK: Longevity information + +Part Number: IWR6843ISK Hi Team, Could you confirm the longevity of this IWR6843ISK antenna board? I have noticed OBSOLETE in digikey website and i couldnt see any info regarding longevity incompany website itself. + +Hi, We are working on rectifying this. The EVM is not and should not be listed as OBSOLETE. BR, Charles O + diff --git a/data/text/DLP1/899826 b/data/text/DLP1/899826 new file mode 100644 index 0000000000000000000000000000000000000000..387370acd7ce1f2e1caf89b02f3a2f19b4b10feb --- /dev/null +++ b/data/text/DLP1/899826 @@ -0,0 +1,6 @@ +LMR36520: Schematic review + +Part Number: LMR36520 Hi team, I got the schematic from customer. Could you kindly review it ? If yes, please send me email and let me share the schematic internally. Thank you and best regards, Michiaki + +Hi Tanii, Pls send email to me at andy.chen@. I will close this thread and discuss it by email. B R Andy + diff --git a/data/text/DLP1/899830 b/data/text/DLP1/899830 new file mode 100644 index 0000000000000000000000000000000000000000..0055ee52e6d610d14893868cb6af1b607a06ec22 --- /dev/null +++ b/data/text/DLP1/899830 @@ -0,0 +1,6 @@ +BQ24610EVM: How to choose D1? + +Part Number: BQ24610EVM Hi Team, Could you kindly recommend how to choose D1 with the max 1.05A charging current for 3s? Thanks and best regards, Jamie + +Hi Jamie, Charge current and output voltage don't matter too much when selecting the bootstrap diode For D1 bootstrap diode, choose diode with the following: DC blocking voltage rated higher than supply voltage (VCC) with some margin. You want to account for the ringing in your system you would see when HSFET turns on, as when HSFET (Q3) turns on, the bootstrap diode will reverse bias to prevent reverse discharge into REGN. For the EVM, as BQ24610 is rated for 28V input (max recommended operating input voltage), a D1 diode with DC blocking voltage of 40V was used. Use sckottky diode Both the diode conduction losses and reverse recovery losses contribute to the total losses in the gate driver and must be considered in calculating the gate driver IC power dissipation. Choose diode with low forward voltage to reduce conduction losses (schottky has lower forward voltage drop) Scottky diodes offer fast recovery time. This means small amount of stored charge can be used for high speed switching applications. Peak current through the bootstrap diode is when LSFET is on, and REGN charges the bootstrap capacitor, and is given by Ipeak = Cboot * dV/dt Cboot = 0.1uF dV = 6V (REGN is charging the boostrap capacitor) dt = switching frequency You can choose a bootstrap diode with forward rating current roughly more than this ideal peak current calculation. D1 uses 480mA forward current rating which is fine. + diff --git a/data/text/DLP1/899841 b/data/text/DLP1/899841 new file mode 100644 index 0000000000000000000000000000000000000000..3d29729e8a2f5ce38bc15da7d6d12898bc5f08a7 --- /dev/null +++ b/data/text/DLP1/899841 @@ -0,0 +1,8 @@ +BQ24070: Inquiry about datasheet + +Part Number: BQ24070 Hi Sir, BQ24070RHLR I have some questions in datasheet, please help me clarify it. What is meant of POR? What is the "POR" condition drawn in the starting point of the flow chart in page 16 ? Input voltage to IN pin? Input voltage to BAT pin? The other question is sleep mode in chapter "8.4.1 Sleep Mode of page 14. Does Q2 ON in sleep mode work even if the POR * of the IC has never worked? In other words, if the IC has no IN input even once and there is a battery connection, will the IC output battery voltage to the OUT pin via Q2? Thank u. Regards, + +Hello Yumiko-San, POR means power on reset. This just means the device get resets on power on. At POR, the input voltage will be regulated to 4.4V and battery is regulated to 4.2V. Yes the battery voltage will be on OUT when VIN is not present. + +One more Question, When VIN of BQ24070 is not present and BQ24070 is sleep mode, do the TS pin output the current(100uA) or voltage? If the TS pin does not output any current, is it no probrem that the TS pin is applied voltage(3.3V)? + diff --git a/data/text/DLP1/899844 b/data/text/DLP1/899844 new file mode 100644 index 0000000000000000000000000000000000000000..c7a177c9a9a08f08ab452cf99aac67cc68103404 --- /dev/null +++ b/data/text/DLP1/899844 @@ -0,0 +1,10 @@ +BQ25710EVM-017: No voltage reading from eval circuit. + +Part Number: BQ25710EVM-017 Hi I am in the process of setting up an eval. environment to understand the function of the different registers in BQ25710. The end application will be a portable device with a 4S battery. After setting up the eval board everything seems to work fine, I can read and write the different registers, set charging current and so on, but when reading register 0x26, "System and Battery Voltage Readback", I only get 0000. This is the case whether if I try with only the battery connected, in which case I can measure battery voltage on both Vbat and Vsys connectors, or with only power supply connected, in which case there is only voltage on the Vsys connector, or both. Am I missing something here? Is there a register that has to be set to read the voltage, or is there something wrong with my eval board? Regards Gunnar + +Hi, Gunnar, ADC is disabled in low power mode. Before enabling ADC, low power mode should be disabled first. + +Hi, thanks for your reply. I already tried setting bit 15, reg. 12h to 0, which should disable low power mode, but still no voltage reading. Any more bits to set? Regards Gunnar + +OK I figured it out. You also have to set the ADC options in reg.35h Regards Gunnar + diff --git a/data/text/DLP1/899849 b/data/text/DLP1/899849 new file mode 100644 index 0000000000000000000000000000000000000000..13f544c6946b6dbd8fd0919a1bb09cc56cc3cfe3 --- /dev/null +++ b/data/text/DLP1/899849 @@ -0,0 +1,10 @@ +LP87564-Q1: Remote sensing + +Part Number: LP87564-Q1 Dearcompany members, We are currently using your LP87564 to supply a TDA2p processor. Due to some EMC problems we have found that we need to add ferrite beads at each one of the LP87564 outputs, just after the LC filter. But this solution is generating a new issue. The high current demanded by some of the TDA2p voltage rails is generating a voltage drop in those ferrite beads, which is getting more critical at high temperatures. We have tried to do a remote sensing of the DC signal by connecting FB pin after the ferrite bead. This seams to be functional at least in room conditions, but if we check the switching signal of the buck converter we can see that the PWM is not stable in the first seconds after power up and DC regulation is not very precise. It looks like the inductive part of the ferrite bead is affecting the feedback and it takes some time to adjust and lock the feedback loop. Do you know if it is possible to adjust the LP87564 to perform this remote sensing? Do you know if the AVS and other power management tools of the TDA2p would be able dynamically compensate this voltage drop? BR, Vicent Climent + +Hi Vicent, The engineer will respond on Monday EU time. + +Hello Vincent, The control loop for LP87564 is not designed for secondary L in the output and it will cause stability issues. So if the feedback is taken after the ferrite bead, the phase/gain margin will be poor and cause oscillation. Also the load transient response for the buck will be poor if ferrites are added to the output, so there's also affects to the dynamic performance, not only the DC drop. So I would suggest trying some other methods for solving the EMC problems. Usually the layout is the first one to check. There's general guidance for it in the datasheet application section. Are you using snubbers on the SW nodes? Fine tuning those values can help with the EMC as well. Do you have EMI filters on the input side? In the LP8756 EVM we have used ferrites in the input side if you would like to check. That usually requires quite a lot bulk capacitance after the ferrite to have the input voltage stable after the filter(s). Thanks. Regards. Tomi Koskela + +Hi Tomi, Thank you very much for your answer. I general we have taken a big effort to make sure that the power supply layout is properly done. Could it be possible for your experts to take a look on our layout implementation of the LP87564? Regarding the snubber, we have it mounted but didn't do a fine tune on it. We can check on that. What might be a bit point here is the EMI filter you have in the input of the LP87564 EVM. Ours is right now much smaller as we are not placing that big capacitors (100uF) and the ferrite bead in the LP87564 input (I took for reference the following doc /lit/ug/snvu632/snvu632.pdf?ts=1587968020541). We will test this solution and get back to you with new results. Thx and BR, Vicent Climent. + diff --git a/data/text/DLP1/899850 b/data/text/DLP1/899850 new file mode 100644 index 0000000000000000000000000000000000000000..2db12a6359c7208fc35951ca6fef6108d232769c --- /dev/null +++ b/data/text/DLP1/899850 @@ -0,0 +1,6 @@ +IWR6843ISK: Soft reset DSS, BSS and MSS + +Part Number: IWR6843ISK Hello Team, I would like to implement a software controlled reboot on my RADAR chip. I need to disable all three subsystem and restart the subsystems. I have tried using soft-reset API from SOC driver and integrated with CLI command. It restarts only the MSS. I wasn't able to find a feature to power-down BSS. So, I tried using the halt BSS API and then soft-reset the MSS. The board went into an unknown state and I had to power cycle it. In case of DSS I have found a power down sequence in your TRM, but no available API in your SDK. Is there any software document or code snippets that explain/assist in implementing this feature by ensuring all that BSS and DSS is completely shutdown before restarting the MSS ? It would be better if we can give the control over to the primary boot-loader and start everything again. Thanks, Dinesh + +Hi Dinesh, You have outlined the full extent of power-down functions, as outlined in the TRM. This all that we can provide at this time. Regards, AG + diff --git a/data/text/DLP1/899867 b/data/text/DLP1/899867 new file mode 100644 index 0000000000000000000000000000000000000000..69cd4911f421e083bffa318e2224376394b041d9 --- /dev/null +++ b/data/text/DLP1/899867 @@ -0,0 +1,8 @@ +LM5023: Problem with startup circuit + +Part Number: LM5023 Hello, I have an ACDC converter which uses the LM5023 as the flyback controller and UCC24612 as the secondary rectifier. Even though the flyback controller is supplied with the required voltage, neither its gate driver (out pin) nor its soft start pin seem to be working as expected – They are always low. Already at start-up, the circuit seems to be operating in an overload scenario, as the VSD pin intermittently controls the charging (12.5V) and discharging (7.5V) of the VCC cap as depicted in the attached image, which leads me to believe that the internal logic is actually working. The same behaviour repeats itself in two different samples, so I assume it is a systematic error and since the schematic is very much similar to the reference design one, I wonder what went wrong. Attached is the schematic and the measurement results. Any help is appreciated. ACDC_Schematic_V1.pdf + +Hello, LM5023 has OVP and OCP protection. If either of these get triggered the device will cycle VCC on and off. You just might not be seeing the gate drive pulses because you resolution is no high enough. The aux winding will trigger and OVP trips when VS is roughly 3V. If there is too much ringing on the Aux winging it can trigger an OVP. This can happen any time while the flyback is delivering energy. If this is the case putting a snubber across the output rectifier will help resolve this issue. There is an evaluation module for the UCC24612 that has a user guide that describes how to set up an RC snubber for this purpose in section 7. The users guide can be found at the following link. /lit/ug/sluubp3/sluubp3.pdf Regards, + +Hello, I found out the problem, which was actually related to the under voltage shutdown circuit, which was affecting the soft start. Now the board is at least starting up. Thanks, Victor + diff --git a/data/text/DLP1/899881 b/data/text/DLP1/899881 new file mode 100644 index 0000000000000000000000000000000000000000..309027baacdc9a264c7e15dfeda257f5fb207ffc --- /dev/null +++ b/data/text/DLP1/899881 @@ -0,0 +1,8 @@ +LM74700-Q1: How to understand the parameters provided in "Functional Safety FIT Rate, Failure Mode Distribution LM74700-Q1" document? + +Part Number: LM74700-Q1 Hi team, I want to know the meaning of parameters provided in the document "Functional Safety FIT Rate, Failure Mode Distribution LM74700-Q1". Can you email some corresponding materials or documents to me? For example, what's the meaning of table "FIT Siemens Norm SN29500 (2)"? How to calculate the MTBF according to the different Fit rate of all components? You can reply to me through emails. Thanks. + +Hi Yes, I will get back by email on the functional safety FIT rate on LM74700-Q1. Regards, Kari. + +Hi Charles, Due to the type of content, I think we may have to take this thread discussion offline over email. I have sent an email to you. Regards, Kari. + diff --git a/data/text/DLP1/899888 b/data/text/DLP1/899888 new file mode 100644 index 0000000000000000000000000000000000000000..6de41d910d279d2ad0a53b8eb3a5c4905bc9f25d --- /dev/null +++ b/data/text/DLP1/899888 @@ -0,0 +1,6 @@ +CCS/IWR1642BOOST: AWR1642: Create a new array and assign the starting address + +Part Number: IWR1642BOOST Tool/software: Code Composer Studio Hi， In the mmwave_sdk_user_guide.pdf (Version : 02_00_00_04), a method about how to add a .const (table) beyond L3 heap in mmW demo where overlay is enabled is introduced: But I met a new problem.When I created an array, its data address overlapped with the obj->radarcube. This situation will cause errors in subsequent calculations. Therefore, I need to assign an appropriate starting address to this new array, but I don't know how to do that . Function MMW_ALLOC_BUF can assign an address to an array, while the array has to be a member of structure MmwDemo_DSS_DataPathObj. Thanks! + +Hello, As mentioned in the SDK 2.1 user guide (section 6.9) , overlays are used for overlaying one time execute (initialization) code with data memory. You cannot overlay an array that you want to use at runtime with Radar cube without reducing the size of Radar Cube first. You need to reduce the size of the Radar cube by the amount needed for your const buffer and then use the linker option (HIGH) as shown in the example to make sure that the const buffer is allocated at a high address so as not to overlap with the Radar Cube. Please make sure you are following the example correctly and also refer to the Linker command file resources mentioned in the following thread: Linker command file:company Linker Command File Primer Linker command file (advanced): Advanced Linker Techniques for Convenient and Efficient Memory Usage Regards -Nitin + diff --git a/data/text/DLP1/899892 b/data/text/DLP1/899892 new file mode 100644 index 0000000000000000000000000000000000000000..18edf04a0e91ef368ba12995177d179ba6e9f181 --- /dev/null +++ b/data/text/DLP1/899892 @@ -0,0 +1,10 @@ +TPS2359: A question about current limit timer + +Part Number: TPS2359 Hi Team, My customer is using TPS2359 widely in their system. The llimit is 8A and fault timer is 5.4mS for period when Vgs lower than 6V. My customer's question is: if i exert a 10A 5ms and 0A 5ms square wave load on output, the TPS2359 would not protect MOS anymore. Because when 10A is making Vgs drops for 5ms, it drops to 0A before timer terminates. Then timer releases to 0ms. The upcoming 5ms 0A is not enough for mos to dissipate heat. Therefore, the mos will accumulate heat until it is damaged. See below for how the waveform looks like. Could you please tell me if there is a status bit in register that indicates TPS2359 has started current limit? From hardware point of view, do you know if it is possible to do some workaround to protect MOS from over-heat? Thank you! -Wenhao + +Hi Wenhao, Shorter fault times reduce the stresses imposed on the pass FETs under fault conditions. So, it is recommended to select the shortest fault times sufficient to allow down-stream loads and bulk capacitors to charge. Unfortunately, fault is reported only after fault timer runs out, and channel turned off. + +Hi Praveen, Shorter timer will fail start-up. They have tried. Based on situation, is there a hardware way for us to ease the heat stress in this corner case? -Wenhao + +Hi Wenhao, One option here is to replace the FET with another one which has better SOA. Most of the FET's are pin to pin. + diff --git a/data/text/DLP1/899901 b/data/text/DLP1/899901 new file mode 100644 index 0000000000000000000000000000000000000000..31df859dd73a59310fe0ba5b587a79478306ea1c --- /dev/null +++ b/data/text/DLP1/899901 @@ -0,0 +1,6 @@ +UCC28070: Current detection method + +Part Number: UCC28070 Hi, I am considering using UCC28070 device. Regarding the current detection method of UCC28070, I would like to detect the current by inserting a low resistance on the source side of the FET as shown below, instead of the current transformer method of the recommended circuit. Is such a method of current detection possible? If so, is there acompany current sense amplifier that is the best choice for sensing? I am going to use the VCC of UCC28070 (I plan to set it to 13V) for the amplifier power supply. Best regards, + +Hello Kaji, Yes it is possible to control the UCC28070 with resistor sensing of the boost FET current. Attached is a schematic which shows how to modify the UCC28070 EVM by replacing the current transformers with shunt resistors on the source connection of the FETs. 7120.TIDA-0130A(001)_Sch.PDF Regards John + diff --git a/data/text/DLP1/899902 b/data/text/DLP1/899902 new file mode 100644 index 0000000000000000000000000000000000000000..7b02787b9a5cf6d31ab9656bf0ca867f1b900f8c --- /dev/null +++ b/data/text/DLP1/899902 @@ -0,0 +1,6 @@ +LM22674: Vin_min requirement + +Part Number: LM22674 Hi, I want to use LM22674 regulator in my design to convert 9V from a battery to 5V. I calculated the Vin_min as per datasheet and and a value of 7.6V for I_out = 500 mA. But when simulated in webench, its taking Vin till 6.5 V. Since it is battery sourced, cutting off supply at 7 V is like wasting the power left in battery. Can you please help me out here? What should be the minimum input voltage for V_out = 5V? Thank you! + +Hi Sumangala, I recommend TPS560430 for your application. LM22674 is old part which may not support high duty cycle operation while Vin close to Vout B R Andy + diff --git a/data/text/DLP1/899904 b/data/text/DLP1/899904 new file mode 100644 index 0000000000000000000000000000000000000000..2b7e3635bb511bd38370e6c94f81fc8359879e57 --- /dev/null +++ b/data/text/DLP1/899904 @@ -0,0 +1,8 @@ +Enquiry regarding pico-projection module for a new product + +Hello, For a new project we are working on we require a pico-projector that is capable of projecting on various surfaces and in various conditions. Here are the main characteristics / requirements: Module size: the projection module shall be as small (and as light) as possible because the end-product will be portable. The smaller and lighter, the better. Temperature range: the end-product shall be functional in temperature range of -10oC to 50oC Durability: the end-product will be used outdoor in various conditions. We don’t need a military-grade resistance, but certain shock resistance is need. Image definition and resolution: the information that will be projected is relatively simple and will be projected from a distance of 1~2 meters away from the surface. The idea is to have an image of 50-100cm wide maximum. There is no need for high-definition or super high resolution for that matter. Lighting conditions: the device will potentially be used at all times, so the projected image shall be clear enough in both bright daylight and dark conditions. Focal point: The projection will be done while the end-product is moving, so the distance from the projection module and the surface can vary +/- 30cm. The projection unit shall be capable to compensate for these variations by auto-focusing. Projection surface: the image shall be projected on various surfaces, not necessarily smooth. The surfaces will remain mostly flat, but some of them might be slightly curved. Electricity: the projection module will be fed by another, separate, module that will include a battery. Data transfer: the information to be projected will come from the user’s mobile phone. Ideally, the projection module will include a Bluetooth interface that allows this data exchange. Otherwise, the battery module will handle the data exchange with the mobile phone and then transfer the information to be displayed to the projection module via physical cables. Please advise ifcompany has a suitable product and contact me for further discussion. Thank you. + +Hello Tom, Welcome to DLP forum and thank you for your interest in DLP technology. Appreciate the detailed description of your requirements. I would like to clarify thatcompany manufactures and markets only electronic components. We have extensive ecosystem of optical engine manufactures and system integrators who provide an optical engine or a finished product. I would like to recommend that you review the application note "TI DLP® System Design: Brightness Requirements and Trade-offs". /lit/an/dlpa068b/dlpa068b.pdf?ts=1587746857718 This application note will be helpful in finalizing your brightness requirement. Are you looking for finished Pico projector or want to buy an optical engine and integrate into your product by building your own electronics? If you are looking for an optical engine, please use "DLP® Products optical module search tool" to identify readily available optical engines from our ecosystem of optical engine manufacturers. /tool/DLP-OMM-SEARCH However, if you are looking for a complete pico projector ,please reach out optical engine manufacturers like Young Optics, coretornic they may be able to provide you a finished product. Please let us know if you have any follow-up question. regards, Vivek + +Dear Vivek, Thank you very much for the valuable reply. I will explore further the resources you provided and will contact you again if needed. + diff --git a/data/text/DLP1/899905 b/data/text/DLP1/899905 new file mode 100644 index 0000000000000000000000000000000000000000..488693ebccbb9f35f6b5fd4734d26dbff4f259a8 --- /dev/null +++ b/data/text/DLP1/899905 @@ -0,0 +1,12 @@ +UCD3138: enable dflash option in multi-image firmware download + +Part Number: UCD3138 Dear UCD friends, Hope everything is doing good with you and your family. Currently I have a project that both primary side and secondary side are using UCD3138, and UART interface was used to communicate those 2 devices. There is a requirements that update primary side UCD3138 firmware from the secondary side pmbus interface. First, host send primary side data to secondary side UCD3138 via pmbus, and then secondary side ucd3138 send those data to primary side via UART. Here I came up with a idea using multiimage option in GUI for testing my firmware, and use multi-image firmware download for updating the pflash and dflash contents, and when I click on read multiimage parameter on GUI, I saw there are Data flash parameter, can you please help me know how to enable to update dflash via multiimage downlaod option? + +We haven't written code to support the data flash write on the multi-image code. Generally for downloading new versions of code in the field, the data flash holds calibration data, so you don't want to change that. If you want to calculate and store new data flash data, that needs to be done as part of the version switching process. It shouldn't be too hard for you to add a data flash write to the state machine. I think you could just add support for the data flash addresses to the existing state machine. I think that the GUI will just give you the address for the data flash. You will have to look at the address and decide what key to write to the flash key register. I am looking to find out the message format for the multiimage parameters. They added a byte for data flash download with the boot flash, and if the GUI sees the extra byte, it gets the extra data. I'll try to get that to you soon. + +Jack, here is the command. Note that the current multiimage code only supports up to the erase page size, and the GUI will support that version as well. 0 is a 4 byte checksum, and 1 is an 8 byte checksum. For number of devices, 0 = 1 device, 1 = 2 devices, and so on. + +Also, you will have to decide how much data flash you want to erase when you get the erase command for the inactive block. + +Hi Ian, Thanks for supporting here. I've tried your solution of reading the dflash start&end address to GUI, this will insert GUI to start to downloading dflash. It works now. Thanks... + diff --git a/data/text/DLP1/899906 b/data/text/DLP1/899906 new file mode 100644 index 0000000000000000000000000000000000000000..e4c713580f6bf48d0b184ce8ce448fa495becc65 --- /dev/null +++ b/data/text/DLP1/899906 @@ -0,0 +1,6 @@ +BQ24296M: bq24296m driver for linux + +Part Number: BQ24296M Dear team, Could you provide the c code for bq24296M RTOS driver or Linux driver? Thanks. Best regards, Sammi + +Sammi, Please visit /support/power-management/f/196/t/878463 for BQ2429X: Schematic Review and PCB Layout Design Tips and /support/power-management/f/196/t/875388 for BQ2419X/2429x FAQs. FAQ #6 answers your question. Thanks, Ning. + diff --git a/data/text/DLP1/899908 b/data/text/DLP1/899908 new file mode 100644 index 0000000000000000000000000000000000000000..bd0ee95d5e168078fd7c0ab8b6accaab13605fa2 --- /dev/null +++ b/data/text/DLP1/899908 @@ -0,0 +1,6 @@ +LM5170EVM-BIDIR: Inquire Buck(CC) and Boost(CV) control circuit + +Part Number: LM5170EVM-BIDIR Hi Sir, May I learn from you does LM5170 can be used on below application? 1. In normal condition, from input to output is Boost topology and CV control. 2. If output higher than input, then change to Buck topology and CC control. Do we have reference circuit can achieve this feature? Thank you. Edward Chen + +Hi User, From your description, what you need is a buck-boost circuit. To use the LM5170, you can refer to /tool/PMP15035, using two stage to implement the buck-boost function. You can control CC and CV for the output stage. By controlling ISETA, you can implement CC. You may also consider LM5176 four switch buck-boost, and the CC is implemented with ISNS(+) nd ISNS(-). Thanks, Youhao Xi, Applications ENgineering + diff --git a/data/text/DLP1/899910 b/data/text/DLP1/899910 new file mode 100644 index 0000000000000000000000000000000000000000..d48c76ebd1bde9a499f62fbf733dcebbf77235f2 --- /dev/null +++ b/data/text/DLP1/899910 @@ -0,0 +1,6 @@ +LM2733: alternative for LM2733 and MC33063A + +Part Number: LM2733 Hi Team, Is there any nex gen or alternative for LM2733 or MC33063A? + +Hi Rui, Please share the Vin range, Vout, Iout specifications so that we can suggest acompany boost device for you. + diff --git a/data/text/DLP1/899913 b/data/text/DLP1/899913 new file mode 100644 index 0000000000000000000000000000000000000000..4be8738280cb4973686740aa9f995d191d4db758 --- /dev/null +++ b/data/text/DLP1/899913 @@ -0,0 +1,6 @@ +IWR6843: regard antenna design + +Part Number: IWR6843 Good day. Is there any design guide or requirement for antenna? thanks. + +HI, Ming: For iwr6843, two type antenna modules are available. They are ISK module and ODS module. The ISK module has narrower FOV on elevation direction and stronger gain on the azimuth direction, it also has better angle resolution in azimuth direction. On the other hand, ODS has wide FOV on both elevation and azimuth direction. And it has lower gain. In the system level, it is more of a tradeoff between FOV, gain, and angle resolution. Users can design the antenna based on their needs. The following document has some details on different antenna modules. /lit/ug/swru546b/swru546b.pdf?ts=1587744972526 Best, Zigang + diff --git a/data/text/DLP1/899914 b/data/text/DLP1/899914 new file mode 100644 index 0000000000000000000000000000000000000000..82c8148edbb32109b948ed709a1b6cb5e002bd06 --- /dev/null +++ b/data/text/DLP1/899914 @@ -0,0 +1,8 @@ +LM75A: LM75AIM/NOPB: About Powe on sequential + +Part Number: LM75A Hicompany expert, We are now using LM75AIM/NOPB, here is a question, please help to check it. If the time interval from power-on to start access is less than about 120ms, it is possible that the device will enter shutdown mode and fail to read the register values properly (readable, all the value is 0). Do the Device have the power on sequential? How can this be avoided. thanks. Cyan + +Hi Cyan, You must wait until at least one conversion cycle is completed before polling the device (min of 300ms). Please see see table note 3 on page 4 of the datasheet. "When the LM75A is accessed, the conversion that is in process will be interrupted and it will be restarted after the end of the communication. Accessing the LM75A continuously without waiting at least one conversion time between communications will prevent the device from updating the Temperature Register with a new temperature conversion result. Consequently, the LM75A should not be accessed continuously with a wait time of less than 300ms". Thanks, David + +David I've seen that, thanks very much. + diff --git a/data/text/DLP1/899929 b/data/text/DLP1/899929 new file mode 100644 index 0000000000000000000000000000000000000000..b2cae4fd8f69903ecb66823411e746a62230b33e --- /dev/null +++ b/data/text/DLP1/899929 @@ -0,0 +1,6 @@ +BQ25616: Type C charger solution + +Part Number: BQ25616 Dear expert, My customer need a 1s fast charger IC that support Type C standard. Besides 5V3A, they may also consider 9V/12V PD protocol so the current on cable can be reduced. Now customer selected BQ25616, but their board is small so they concerned about thermal problem. Could you share some suggestions about their design? Besides, our charger device don't have charging port controller. Now I recommend TUSB321 and TPS65988, do you have some insight about the compatible protocol IC with BQ25616? Thanks. + +Hi Minqi: BQ25616 can take up 13.5V input voltage. So there is no problem to support 9V or 12V input. The maximum charge current is 3A. Depending on the charge current, the board can be sized properly based on power loss on the board. The customer may look up the efficiency and calculated total power loss on inductor and IC. The IC temperature rise can be estimated. BQ25616 is a standard alone charger. It should be working with other PD controller. Regards, Hong + diff --git a/data/text/DLP1/899930 b/data/text/DLP1/899930 new file mode 100644 index 0000000000000000000000000000000000000000..6c923796ecbf3617652d72ffda0a88a704a0a834 --- /dev/null +++ b/data/text/DLP1/899930 @@ -0,0 +1,6 @@ +AWR1642: Question about warm-reset feature that use external watch dog ? + +Part Number: AWR1642 Hi, I have used the ext. WDT to implement warm-reset. As far as I know, the warm-reset would be triggered if MSS, DSS or BSS fails. My question is that if DSS or BSS is crashed, will a warm-reset be triggered? Thanks. + +Hello Kris, Warm reset can be triggered via internal WDT expire and with the specific code also MSS can trigger the warm reset to the device. BSS sends CPU/ESM fault async-event to MSS over mailbox based on which MSS application can trigger the warm reset or let WDT expired. Same way you can implement for DSS crash as well where if DSS can send a specific crash message over mailbox to MSS to notify about the fault. Or if DSS doesn't send periodic object result within specific interval then MSS can trigger the warm reset/ or let WDT expired. Regards, Jitendra + diff --git a/data/text/DLP1/899937 b/data/text/DLP1/899937 new file mode 100644 index 0000000000000000000000000000000000000000..fabd8ddc0751b59f80289620385260874a058fde --- /dev/null +++ b/data/text/DLP1/899937 @@ -0,0 +1,6 @@ +CCS/BQ40Z60: lifetime unit and + +Part Number: BQ40Z60 Tool/software: Code Composer Studio 1, STL and STH unit in sluuao4d is 2 hours. But in .gg file, STL and STH unit in dataflash lifetime section is h. Could you help check which one is right?5707.7_19_6_3 version.gg.csv 2, Does data come from RAM lifetime data or lifetime data in dataflash lifetime esction when I use ManufacturerAccess() 0x0060 Lifetime Data Block 1,2, 3, 4, and 5 to get lifetime data? Thanks! + +Emma, Reading the command will return the RAM contents. RAM is written to flash every 10hours. If a reset occurs during the 10 hours the RAM will be lost and will be re-initialized to the last flash write. Thanks, Eric Vos + diff --git a/data/text/DLP1/899938 b/data/text/DLP1/899938 new file mode 100644 index 0000000000000000000000000000000000000000..9e4778436390df217ff981f3bc5ca10755c35e90 --- /dev/null +++ b/data/text/DLP1/899938 @@ -0,0 +1,10 @@ +CSD25501F3: Gate resistance and Td spec + +Part Number: CSD25501F3 Hi Expert, CSD25501F3 has Gate resistance Rc(10kohm) + Rg(33ohm) between G pin to Gate. Customer feels, it is too big. they think, the Raising time and the Falling time will become longer than datasheet spec. Is the following figure correct? Could you please let me know about Min value and Max value for the following Td parameters? Thanks Muk + +Hello Muk san, Thanks for promotingcompany FETs at your customer. The switching times are only measured on samples from 3 lots at characterization during product development and we do not spec or guarantee min or max values. You can find more details under the Support & training tab on the MOSFET landing page on . Click on Understanding MOSFET data sheets and you will see a link for Switching Parameters. I cannot share the characterization data here but will send you more details in an email. + +Hi John-san, Thank you for your answer! I received your e-mail. Thanks. Could you please give me your comment for 10kohm Gate resistance? Muk + +Hi Muk san, The 10kohm gate clamping resistor allows this device to have an abs max VGS rating of -20V. The gate-source ESD diode acts a zener with a breakdown voltage of ~6V. The 10kohm resistor limits the current and therefore power dissipated in the gate-source clamping diode. + diff --git a/data/text/DLP1/899945 b/data/text/DLP1/899945 new file mode 100644 index 0000000000000000000000000000000000000000..1746f194cc871488848240beef541f3b95e8f19f --- /dev/null +++ b/data/text/DLP1/899945 @@ -0,0 +1,8 @@ +BQ21061: I2C reset + +Part Number: BQ21061 Hello Expert, Could you help explain more details about tI2CRESET I 2C interface inactive reset timer 500ms? As the picture below, I can't find more in the datasheet. Thanks. + +Hello, In my opinion, Twatchdog means we need to write watchdog within every 50s, otherwise, all settings will be set to default. Ti2crest limited I2C need to active every 500ms? what does the definition of inactive? Thanks. + +Hello, It is a timer to prevent I2C hangup. If any transaction takes longer, the I2C is reset. + diff --git a/data/text/DLP1/899949 b/data/text/DLP1/899949 new file mode 100644 index 0000000000000000000000000000000000000000..95126083b9ce2c81e7b4e7833349e6f2d47be4b8 --- /dev/null +++ b/data/text/DLP1/899949 @@ -0,0 +1,10 @@ +TPS546C20A: parallel 2 TPS546C20A + +Part Number: TPS546C20A Hi Team, I would like to have a quick check on TPS546C20A , per d/s says, this device can be paralleled together to provide up to 70-A load. for the 70A load , it means continue load current , not peak current , is that correct? + +Andy_Lin The TPS546C20A is rated for 35A continuous current. It's Peak current is limited by the programmable range of its current limit functions. However, as with any converter, the continuous thermal current rating may also be limited by the available air-flow, ambient air-temperature and the device's safe operating area due to the resulting die temperature. See figures 20, 21, and 22 on page 13 of the datasheet for more guidance: /lit/ds/symlink/tps546c20a.pdf#page=13 If you need more current capability than the TPS546C20A can provide, I would suggest reviewing the TPS546D24A, a 40A Integrated FET converter that also has PMBus and is stackable upto 4 devices. /product/tps546d24a + +Hi Peter , thanks for your detail feedback. customer would like to used 2 of TPS546C20A in parallel , and provide around 45 A(continuous) for their chips as supply, that's why it has this question . Looks its OK to used it this way , and the current limit can set through PMbus , I will let customer know the comment and see if there's more questions to check. thanks again!! Andy + +You are most welcome Andy_Lin I am glad that I could help. + diff --git a/data/text/DLP1/899951 b/data/text/DLP1/899951 new file mode 100644 index 0000000000000000000000000000000000000000..bc4724e94d1ecfd88a5731e2baa3a8f8407f1882 --- /dev/null +++ b/data/text/DLP1/899951 @@ -0,0 +1,6 @@ +BQ78PL116:BQ78PL116 software + +Part Number: BQ78PL116 /support/power-management/f/196/t/73237?bqWizard-3-0-16 I need BQWIZARD 3.0 software for BQ78PL116 product. Could you help? + +Hello, This is on the product page. Please install from there. Again this is NRND part, please refer to bq40z50 and bq34z100. + diff --git a/data/text/DLP1/899954 b/data/text/DLP1/899954 new file mode 100644 index 0000000000000000000000000000000000000000..acfe82964685fe355df61e6067c5576ea04b202a --- /dev/null +++ b/data/text/DLP1/899954 @@ -0,0 +1,6 @@ +DC/DC Layout Guide + +Hi Team, Do we have Layout guide APP note for DC/DC converter like buck/boost/buck-boost? I know we have layout guideline in each IC datasheet, but I would like to know if we have general layout guideline. Thanks. Regards, Roy + +Hi Roy, Here are some guidelines: /lit/slva773 /lit/slyt614 /lit/snva638 Best regards, Milos + diff --git a/data/text/DLP1/899966 b/data/text/DLP1/899966 new file mode 100644 index 0000000000000000000000000000000000000000..be68146bf12c7d45815234238d4a9c680bf57a6b --- /dev/null +++ b/data/text/DLP1/899966 @@ -0,0 +1,6 @@ +LM3488: with out soft start + +Part Number: LM3488 i did design SEPIC with LM3488 for UPS board, but that need more quick startup for power source transient. i want compatible IC without soft start , or adjustable. is it in lineup? + +Hi Keiju, Thank you for using the LM3488 in your design. Unfortunately, LM3488 does not appear to have adjustable soft-start. I would recommend looking at the newer IC's, such as the LM5155. The LM5155 can be thought of as an upgrade to the LM3488 with lower quiescent current, higher efficiency, and more features than that of the LM3488 including adjustable soft-start. Thanks, Richard + diff --git a/data/text/DLP1/899971 b/data/text/DLP1/899971 new file mode 100644 index 0000000000000000000000000000000000000000..bd12c36708d22400d314ac99899015a5c95bbda0 --- /dev/null +++ b/data/text/DLP1/899971 @@ -0,0 +1,10 @@ +TPS548B22: TPS548B22 switch node negative Spike + +Part Number: TPS548B22 HI SIR We use tps548B22 to design 12V to 0.8V_14A, and measure the switch node negative Spike beyond the maximum value. We have been very close to the ic body to measure this voltage waveform. We want to confirm whether such a situation will cause damage? Can we use RC snubber or TVS to suppress this phenomenon? The equipment we use is as follows ~~ Tektronix P5205A-2 High Voltage Differential Probe 100MHz 50X Bandwidth no limit Oscilloscope: Tektronix DPO5104B 1 GHz digital 4 ch Bandwidth: 1GHz + +Kao Mick While this is unlikely to cause damage, it is always recommended to keep the device within its listed datasheet maximums. Yes, you can use a snubber from the SW not to PGND node. I would recommend starting with a 1nF snubber with a 1-Ohm resistor and working from there. Layout of a snubber is critical to keep the loop inductance as short as possible so that the snubber is effective at ~120MHz where this ringing is occurring. A small, ultra-fast rectifier diode directly between the SW node and PGND may be able to react fast enough to shunt some of the current and reduce the negative peak, but I would not recommend a TVS diode as a TVS diode is unlikely to react fast enough to provide much peak suppression You can also try changing C29 from 100nF to 10nF. These smaller capacitor values in 0402 packages offer lower ESL and the ability to suppress higher frequency noise. We have seen significant SW ringing improvement placing a 2.2nF - 10nF 0402 capacitor from VIN to GND under the VIN pins on the backside of the board when there are vias available to connect VIN and the thermal pad to the backside of the PBC. By providing a separate, parallel path from the main power path, this helps reduce the inductance and high-frequency performance of the bypassing. + +Hi SIR Would you recommend bootstrap to connect 0.1uF in series with 4.7 ohms? + +Kao Mick You can add a resistor upto 4.7-ohm in series with the boot strap capacitor (C311 in your schematic) to slow-down the turn-on of the high-side FET and reduce overshoot ringing on the SW node on its rising edge, but the turn-off of the high-side FET does not drive current through the BOOT pin, so it will have minimal effect on the speed of the turn-off. With an external FET controller, adding a resistor in series with the gate drive signal would help reduce the turn-off rate, but with internal drivers and FETs, there is no access to the FET turn-off driver path. You can try replacing D25 with a high-speed rectifier diode, or an R-C snubber to reduce the negative peak on the falling edge of the switching node. + diff --git a/data/text/DLP1/899973 b/data/text/DLP1/899973 new file mode 100644 index 0000000000000000000000000000000000000000..459e1f789a5a3f03029fa676ec527df533c7c065 --- /dev/null +++ b/data/text/DLP1/899973 @@ -0,0 +1,6 @@ +UCC2897A: Gerber/CAD Files + +Part Number: UCC2897A Hi Can you please provide me with Gerber / CAD files for UCC2897A part . We are using VQFN package. It would be helpful if the Gerber / CAD files are of VQFN. BR Pavaman P + +Hello Pavaman, Please download the CAD file from the link below: This is available on the product page: https:///product/UCC2897A/toolssoftware Regards, Sonal + diff --git a/data/text/DLP1/899974 b/data/text/DLP1/899974 new file mode 100644 index 0000000000000000000000000000000000000000..546632350a33ac688c8cb039e945505f18e4ed00 --- /dev/null +++ b/data/text/DLP1/899974 @@ -0,0 +1,8 @@ +TPS54425: TPS54425 Switch node negative Spik + +Part Number: TPS54425 HI SIR We use tps54425 to design 12V to 1.0V_4A, and measure the switch node negative Spike beyond the maximum value. We have been very close to the ic body to measure this voltage waveform. We want to confirm whether such a situation will cause damage? Can we use RC snubber or TVS to suppress this phenomenon? The equipment we use is as follows ~~ Tektronix P5205A-2 High Voltage Differential Probe 100MHz 50X Bandwidth no limit Oscilloscope: Tektronix DPO5104B 1 GHz digital 4 ch Bandwidth: 1GHz + +Kao, That is barely measuring past -3 V. The most accurate measurement will require a differential probe. I think you will find that if you measure it properly with a differential probe, the negative excursion will be well within specification. + +HI SIR Would you recommend bootstrap to connect 0.1uF in series with 3.3 ohms? + diff --git a/data/text/DLP1/899983 b/data/text/DLP1/899983 new file mode 100644 index 0000000000000000000000000000000000000000..95b90d106ca4f33a375f5e76398db51520633a9f --- /dev/null +++ b/data/text/DLP1/899983 @@ -0,0 +1,8 @@ +DLP4500NIR: Beam shaping algorithm + +Part Number: DLP4500NIR I want to accomplish the laser beam shaping through some algorithm including Lee holography,GS algorithm and so on,but I have some questions for this: 1、 Can I accomplish the only-phase modulation through the holography? Because I had seen a paper shown the only-phase modulation by using DMD 2、Docompany have some example for accomplish beam shaping including Gaussian beam into Laguerre-Gaussian beam or Flat-Top beam + +Hello, Welcome DLP forum and thank you for your interest in DLP technology. I will ask around with my colleagues and get back. regards, Vivek + +Hello, Yes, it should be possible to shape a laser beam arbitrarily with a phase-only SLM. We don't have any past work insidecompany on this subject. There are are several papers that discuss how to do it. One such reference would be a PhD Thesis ; "Novel implementation of a phase-only spatial light modulator for laser beam shaping" byLiesl Burger. Department of Laser Physics, University of Stellenbosch, Private Bag X1, Matieland 7602, South Africa. Please let us know if you have any further questions. regards, Vivek + diff --git a/data/text/DLP1/899985 b/data/text/DLP1/899985 new file mode 100644 index 0000000000000000000000000000000000000000..d2569899b0556cf73276fc8857bb07258077669e --- /dev/null +++ b/data/text/DLP1/899985 @@ -0,0 +1,8 @@ +IWR1642: Coordinates data extraction + +Part Number: IWR1642 Hi, in my application I am trying to get XY coordinates from IWR1642 device, reading from DATA_port UART; I am able to read and deserialize header (for example coherent magicword=0102-0304-0506-0708, version=02000004, platform=000a1642, TLVtype=1, Z=0, etc; hence I would exclude endianness issue) but the strange fact is that I am not getting any X negative value. Conversely, while running DemoVisualizer I actually have some negative X points: am I missing any additional transformation/conversion? Example: ...[4F][01][28][01][00][00]...-> X=335,Y=296,Z=0 (int16) X=0.6542969,Y=0.578125,Z=0 (float) + +Hi, my bad! I was reading from the serial in string format with wrong encoding, leading to byte truncation; after moving to explicit byte reading everything is smooth and clean. Regards, + +Hi Giacomo, I'm glad you were ableto resolve it. If you have more questions feel free to open up a new thread! Regards, AG + diff --git a/data/text/DLP1/899988 b/data/text/DLP1/899988 new file mode 100644 index 0000000000000000000000000000000000000000..e1c92f9eee893b83a29bc87d23e259d0dc5be5da --- /dev/null +++ b/data/text/DLP1/899988 @@ -0,0 +1,8 @@ +TPS56339: Adjusting UVLO Threshold + +Part Number: TPS56339 Hi team, I know TPS56339 can change UVLO threshold higher by using EN. Can TPS56339 adjust UVLO threshold lower? Regards, Itoh + +Itoh-san, The EN pin control is independent of the internal UVLO for VIN. The device will not turn on if VIN is below the UVLO voltage regardless of the state of EN. + +Thanks! + diff --git a/data/text/DLP1/899990 b/data/text/DLP1/899990 new file mode 100644 index 0000000000000000000000000000000000000000..7fdbc0fe3bac0230c508f91bbc84188cde737136 --- /dev/null +++ b/data/text/DLP1/899990 @@ -0,0 +1,6 @@ +BQ40Z80: How to write SREC + +Part Number: BQ40Z80 Hellocompany Guys, We have exactly the same problem as this previous post : /.../851756 but with the part number BQ40Z80. We are searching a solution for write the file SREC without BqStudio because we dont want any operator interaction in our production system. We didn't find in BqStudio a way to create a golden image and it seems that we are not the only ones : /support/power-management/f/196/t/865061. So my question is the same that the first post link : Doescompany have a solution that writes the entire SREC to a Bq40z80 with minimal operator intervention? Thanks in advance for your help. + +Hello Cyril, We do have a bqTools SDK, but you will need to go through acompany local sales rep. + diff --git a/data/text/DLP1/899993 b/data/text/DLP1/899993 new file mode 100644 index 0000000000000000000000000000000000000000..755bfba55c8e529aa811b39a8fb730aaa588a88f --- /dev/null +++ b/data/text/DLP1/899993 @@ -0,0 +1,8 @@ +TPS2662: Schematic review + +Part Number: TPS2662 Hi, we are having problems getting the below schematic to work robustly. The idea is to have a PoE-PD and divert the 48-56VDC from the PoE switch to a remote sink. So for 802.3at app. 2-3W would be fed into the flyback and converted down to 12V for local supply. The remaining power would be fed from the PoE rail (48-56VDC) via the eFuse to a remote sink. We were hoping the eFuse would switch on only after the PoE switch is supplying the full voltage and also provide power in a controlled way. However, we have already destroyed 3 pieces of TPS26621 just by connecting the load to the output. The destroyed ICs all show an internal closed circuit. Have we overlooked something in the application design? Best regards, Michael + +Hi Michael, Can you please share the full schematic and system block diagram. If confidential, please send me in private. Are the failures happened during turn-off ? What is the Cout on eFuse? and the type of load you are using for test. Best Regards, Rakesh + +Hi Michael, Thanks for sharing the schematic over email. As discussed, please check on the transient voltages on the output side and use TPS26625. Please revert back if there are any followup questions. Best Regards, Rakesh + diff --git a/data/text/DLP1/899994 b/data/text/DLP1/899994 new file mode 100644 index 0000000000000000000000000000000000000000..cd05db7af97d9f8d3f7b97e3c3f0f8adb7dfd1d6 --- /dev/null +++ b/data/text/DLP1/899994 @@ -0,0 +1,6 @@ +UC1846: Circuit configuration for constant voltage control + +Part Number: UC1846 Hello. I use the UC1846 to design a push-pull boost up converter with an input voltage of 28V, an output voltage of 500V, and an output current of 1mA to 30mA. I would like to stabilize the output voltage to 500V ± 10V against fluctuations in the output current of 1mA to 30mA. Please tell me the circuit configuration of the error amplifier to satisfy this. Also, please tell me the circuit configuration to apply the current limit (maximum 30mA). Thanking you in advance. + +Hello, This is current mode controller, there is a PWM comparator which also provides limit peak-switch primary currents on a pulse-by-pulse current limit control. But if you want to limit the output current, a shutdown circuit is required to provide protection circuitry and remote shutdown functions. A voltage transferred from output current larger than 350-mV applying to shutdown pin can disable the device. + diff --git a/data/text/DLP1/900000 b/data/text/DLP1/900000 new file mode 100644 index 0000000000000000000000000000000000000000..112784bef80f5831fd2da8bb6bf59ccd2dd45e00 --- /dev/null +++ b/data/text/DLP1/900000 @@ -0,0 +1,12 @@ +BQ76PL455A-Q1: BQ76PL455A + +Part Number: BQ76PL455A-Q1 Can BQ76PL455A measure voltage below 1 V? Because in section 7.3.3.4 it say it can measure in the range of 1V to 4.95V + +Hi Skandashree, The datasheet is correct, 1V is the min voltage for each cell that was tested to meet accuracy specs. Regards, Taylor + +Hi Taylor, But if the cell is giving around 0.5V Can it measure? + +Hi Skandashree, As mentioned we cannot recommend this although it may be possible to get an inaccurate measurement. If you rely on sub 1V then we cannot guarantee datasheet specs and you would also need to ensure you stay above 12V minimum voltage to power IC via VTOP which would be difficult if your cells are going below 1V each. Regards, Taylor + +Hi Taylor, Thank you so much for clarifying! Regards, A V Skandashree + diff --git a/data/text/DLP1/900006 b/data/text/DLP1/900006 new file mode 100644 index 0000000000000000000000000000000000000000..b5348d51d08ed0eddba466e2432a0648b26224cb --- /dev/null +++ b/data/text/DLP1/900006 @@ -0,0 +1,8 @@ +TPS61221: Tina spice model for TPS61221DCKR is crypted + +Part Number: TPS61221 Hello, I'm using Tina for simulated my circuit. I taked the spice model oncompany site here: /product/TPS61221/toolssoftware But it seems to be encrypted, some know how to decrypt it. soun + +Hi Soun: You could export from Webex to TINA. Here is a guidance I made before. /support/power-management/f/196/p/884700/3271822#3271822 + +Hi Minqiu, Thank for your reply it's great. I tried it and it's ok . Thank you so much have a good day + diff --git a/data/text/DLP1/900007 b/data/text/DLP1/900007 new file mode 100644 index 0000000000000000000000000000000000000000..bcab61f820ac6edeb8d8f2dc549ecde4fe89e2b6 --- /dev/null +++ b/data/text/DLP1/900007 @@ -0,0 +1,6 @@ +LDC1101: Length of SPI connection for reading and setting registers. + +Part Number: LDC1101 Hello there, I would like to ask for recommendation of connection distances of entire sensor system? As recommended in multiple LDC manuals it is best to place capacitor as close as possible to sensor coil. LDC should be also as close as possible to LC circuit. Ideally on the back of the coil. L to C max 1", LDC to LC max 1". How far can be place MCU which sets registers and receives data from LDC? SPI runs at 8MHz. I know that SPI is mainly for short distance, the closer the better but would it work reliably with shielded cables even on distance +-3 fl ? Here is the schematics: Thank you. Best Regards, Michael + +Michael, Thanks for your question. As you point out, higher transmission rates become more difficult at increasing lengths. The maximum distance you can achieve will depend on a number of design factors such as impedance matching and routing techniques to limit coupling with other signals on your PCB. You will want to carefully consider these as you plan your design. Another option would be to insert serial buffers periodically to help limit reflections and maintain signal integrity. You might consider using a device such as SN74AUC125. There are a handful of documents that may prove useful when considering your design that could help limit the need for extra components and give you a bit more guidance what can be achieved when driving SPI signals: Extending the SPI Bus for Long Distance Communication: /lit/an/slyt441/slyt441.pdf Extending SPI and McBSP with Differential Interface Products /lit/an/slla142/slla142.pdf How to Extend an SPI Bus Through a Differential Interface /blogs_/b/analogwire/archive/2015/02/13/extending-spi-with-differential-signaling-technology High Speed Layout Guidelines /lit/an/scaa082a/scaa082a.pdf + diff --git a/data/text/DLP1/900011 b/data/text/DLP1/900011 new file mode 100644 index 0000000000000000000000000000000000000000..54f2fee97f353589842c8e05958f9caec4da0426 --- /dev/null +++ b/data/text/DLP1/900011 @@ -0,0 +1,6 @@ +MMWAVE-SDK: Unit test for drivers SOC and OSAL + +Part Number: MMWAVE-SDK Hi @all, I see in the sdk3.3.0.03 that the folder "test" inside the drivers SOC and OSAL are not present. Is there a way to test these drivers? Thanks BR, Stefano + +Stefano, These drivers are tested within a specific use case context. The following drivers do not include a unit test. The reason they are not included is listed next to each driver. SOC The SOC driver is a collection of bits for influencing device behavior There is no targeted unit test but almost all APIs get tested through the mmWave OOB demo or other drivers OSAL The OSAL driver is tested via all driver unit tests ESM The ESM driver is tested through the watchdog unit test This is the only identified use case of ESM within the SDK context Pinmux The Pinmux driver is tested by all of the peripheral tests and the mmWave OOB demo Regards, Kyle + diff --git a/data/text/DLP1/900015 b/data/text/DLP1/900015 new file mode 100644 index 0000000000000000000000000000000000000000..448901a39aa700700d45442740db3c5bfca3787a --- /dev/null +++ b/data/text/DLP1/900015 @@ -0,0 +1,6 @@ +TPS2044B: TPS2044BDG4 + +Part Number: TPS2044B Hello I need the IBIS model for this part please? TPS2044B: TPS2044BDG4 + +Hi Sir, Don't have this file. For TI's policy, I will first click resolved button. If you have any other concern, contact me any time. If you think resolved, please help click 'Issue is solved button'. Thanks. + diff --git a/data/text/DLP1/900022 b/data/text/DLP1/900022 new file mode 100644 index 0000000000000000000000000000000000000000..1d65a65c90047cf40b2ead2b0841b35b1b2ce4d8 --- /dev/null +++ b/data/text/DLP1/900022 @@ -0,0 +1,6 @@ +TI IWR6843 people counting linux support + +HI , i am trying to load people counting binary to the IWR6843ISK board (no problem in loading) ,i have downloaded the INDUSTRIAL_TOOL_BOX_4_2_1 but when i move into the directory labs/people_count/visualizer i am unable to find visualizer exe for linux only windows is preset,if there is a visualizer for linux (apart from demo visualizer) for people counting let me know ,or if there is an alternate way please let me know. Thanking you + +Hi Rahul, The installer only supports Windows. However, you can just run the program using python - python3 gui_main.py. You will have to install some packages, these are listed in setUpEnvironment.bat Regards, Justin + diff --git a/data/text/DLP1/900024 b/data/text/DLP1/900024 new file mode 100644 index 0000000000000000000000000000000000000000..85798d07d290b936b6bc4843f028d3f1382d31c3 --- /dev/null +++ b/data/text/DLP1/900024 @@ -0,0 +1,8 @@ +UCC28950: how to sımulate ucc28950 for pspıce model + +Part Number: UCC28950 hello how to simulate ucc28950 integration in pspice, I tried, but I failed thank you + +Hello, If you download the Pspice model for the device from thecompany webpage link below, it works alright for me. /product/UCC28950/toolssoftware Regards, Sonal + +hello, I downloaded it and I've been trying to simulate it for a few days and I don't know the library and I can't solve this error I'm looking for a document describing how to include the library in pspice or your suggestion ? + diff --git a/data/text/DLP1/900030 b/data/text/DLP1/900030 new file mode 100644 index 0000000000000000000000000000000000000000..36eadbe4553a79dd53d94c52bc43ba0a1281b491 --- /dev/null +++ b/data/text/DLP1/900030 @@ -0,0 +1,6 @@ +AWR2243: Cascade Data Valid Signal + +Part Number: AWR2243 Hello, We are trying to capture data from the AWR2243 Cascade board over LVDS instead of the default CSI interface. We have the data lines hooked up to an external FPGA board, but are still using the stockcompany board and LUA scripts for setup. Once we have the board set up, we change the data mode to LVDS using the GUI. We are not seeing the Data Valid line toggle. We ran the same test with the AWR2243Boost board, and were able to use the Data Valid line as a trigger for data capture. Is there a reason that the cascade system when in LVDS mode would not trigger this Data Valid line? Is there another signal we can configure to trigger data capture? Thanks, Rob + +Hi Robert, For options like the LVDS/CSI2 lane configuration, I believe these can only be configured once without a device reset. At least that is my experience with the lua API/mmWave Studio and these options. In my normal usage of our single-device and cascaded EVM, I typically limit reconfiguration or looping of parameters only to the SensorConfig tab options (chirp profiles, chirp configs, frame config). I would also recommend modifying the setup script to select the exact options you need. The lines to modify for the ADC datapath are below. There are a few general ways we typically use in mmWave Studio to figure out the exact API options we want when setting up a new script: The lua API generally follows the actual AWRx ICD SPI API command set – so usually the functions and commands are similar You can look-up the full lua API parameter set from within mmWave Studio by using the Lua Shell and typing help and then the command. For example: You can also use the GUI selection and then read off the Output log window to find the function and parameters you need. For example clicking the Set button in the Data Path Configuration pane of the DataConfig tab results in the following API command being executed. Please let me know if that helps. + diff --git a/data/text/DLP1/900035 b/data/text/DLP1/900035 new file mode 100644 index 0000000000000000000000000000000000000000..331ce64c52b1ea9e7de015290f6d7081ef568c00 --- /dev/null +++ b/data/text/DLP1/900035 @@ -0,0 +1,6 @@ +DLP2010: Small, bright projector system with short throw ratio + +Part Number: DLP2010 Hello, could you recommend a complete projector system with a throw ratio around 1, and bright enough to use it in a bright environment? what would be the smallest possible option? Thank you very much for your help + +Hello Delia, Welcome to DLP forum and thank you for your interest in DLP technology. I would like to suggest that you review the application notes on "TI DLP® System Design: Brightness Requirements and Tradeoffs" /lit/an/dlpa068b/dlpa068b.pdf?ts=1587746857718 This will help you finalize the specification of the projector which best meets your requirement considering image size & ambient environment etc. You may also want to visit website of some of Pico projector manufacturer to explore the DLP pico projector which best meets your requirement. Few of such manufactures are: https://miroirusa.com/ https://www.aaxatech.com/products/consumer.htm The projector central website also has list and reviews of the DLP pico projectors available in the market regards, Vivek. + diff --git a/data/text/DLP1/900041 b/data/text/DLP1/900041 new file mode 100644 index 0000000000000000000000000000000000000000..6d9cb71412a3f3ed43d2ade2b173d09a20336c9e --- /dev/null +++ b/data/text/DLP1/900041 @@ -0,0 +1,10 @@ +BQ27520-G4: Unable to set a design capacity above 15400 mAh + +Part Number: BQ27520-G4 Hello, We have recently decided to increase the battery pack size of one of our products, using 21700 cells. The new design capacity should be 19600 mAh. I am not able to get Gauge Studio to accept a capacity above 15400 mAh. I notice that when the datasheet was revised to B, one of the changes was to reduce the capacity to 14500 mAh. However, 32Ah still appears widely in the datasheet and indeed on the product page of TI's web site. So I'm not clear if this is a bug in Gauge Studio, or am I hitting a poorly documented limit of the part. Any advice would be greatly appreciated. Just out of curiosity, if I were to set the design capacity to 15400, how would that affect the behavior of the gauging? Would it even pass a learn cycle? Thanks, Ross + +Hello Ross, I don't recommend going above 15400 mAh, that will cause the energy calculations to over flow potentially. I would say you can try to calibrate the sense resistor such that 2 A = 1 A reported. that will apply 1/2 scale. You will need to scale taper current, qmax, design capacity, any mAh measures to 1/2 as well. Thanks + +Thanks Kang for the suggestion. Is this something you are aware has been done by someone else previously? I assume when you list those parameters above you simply mean that ALL current (mA) settings and results will need to be scaled? What about power (mW/cW) settings and results? I operate the gauge in 'current load' mode and don't use any of the 'power' related results. Can I safely ignore these? Cheers, Ross + +Hi Kang, I found the Application Report (SLUA760) "bq34z100-G1 High Cell Count and High Capacity Applications" which gives a pretty good run down on the subject of scaling for large packs. I also found Application Report (SLUA792) "Enhanced Resolution Gauging for Low Current Applications Using Scaling" which addresses the same thing but for the opposite reason (i.e. small packs). I'm running a learning cycle now so fingers crossed! /Ross + diff --git a/data/text/DLP1/900043 b/data/text/DLP1/900043 new file mode 100644 index 0000000000000000000000000000000000000000..d508779ed06196ccc957d21416471db33b44706c --- /dev/null +++ b/data/text/DLP1/900043 @@ -0,0 +1,10 @@ +IWR6843ISK-ODS: Unable to parse TLV's from UART Data for 3D People Counting Demo + +Part Number: IWR6843ISK-ODS Hicompany Team, We have written one c application which reads data coming from device and parse the TLV's. We are using IWR6843ISK-ODS antenna and Sense and Direct HVAC control demo. Our application is able to parse the TLV's for Sense and Direct HVAC Control Demo with the same antenna. We tried to modify the application for 3D people counting demo but everytime the header comparison is getting failed so we are not able to parse the TLV's for it. Following is the snippet for reading data coming from UART , parsing the header and comparing it with expected Header. uint16_t magic[4] = {0x0102,0x0304, 0x0506, 0x0708}; // expected Header while (1) { memset(&newdata, 0 , sizeof(dataPacket_t)); memset(buff, 0, sizeof(buff)); readBytes = read(g_mmw.datacom_fd, &buff, 1500); if (memcmp(buff, magic, 8) == 0) { // when expected header received in data memset(header, 0, HEADERLEN); memcpy(header, buff, HEADERLEN); while (readBytes < (header->totalPacketLen)) { bufPos = readBytes; numPendBytes = header->totalPacketLen - readBytes; memset(tmpbuf, 0, sizeof(tmpbuf)); tempBytes = read(g_mmw.datacom_fd, &tmpbuf, numPendBytes); readBytes += tempBytes; memcpy((buff+bufPos), tmpbuf,tempBytes); } } else { continue; } May i learn any difference in header format for Sense_and_Direct_HVAC Control and 3D People Counting Demo? Could you please assist regarding this ? Thanks Shraddha + +Hi Shradda, Please see the file in the visualizer source - oob_parser.py. This file contains code that parses the header of both the 3D People Counting demo, and the HVAC demo. You can see the differences in parsing there. Regards, Justin + +Hi Justin, We checked the oob_parser.py file, there is no difference in the magic comparison, only the difference with header members (in sequence), we have modified the header format accordingly and checked. We observed that the baudrate for data COM port is different for 3D-people counting Demo , we modified it accordingly and checked. cfsetispeed(&SerialPortSettings,921600*2); cfsetospeed(&SerialPortSettings,921600*2); But still magic comparison is failing always, so it is not able to parse any TLV's. please find the magic comparison snippet as shown : char buff[1500] = {0}; uint16_t magic[4] = {0x0102,0x0304, 0x0506, 0x0708}; while (1) { memset(buff, 0, sizeof(buff)); readBytes = read(g_mmw.datacom_fd, &buff, 1500); i = 0; while (i < readBytes) { if (memcmp(buff+i, magic, 8) == 0) { printf("Magic Found i = %d\n", i); printf(" %hx %hx %hx %hx %x %x\n", *(buff+i), *(buff+i+2), *(buff+i+4), *(buff+i+6), *(buff+i+10), *(buff+i+14)); break; } i++; } } we are able to observe the readbytes, but magic comparison is always failing. Could you please assist us regarding this issue ? Thanks Shraddha + +Hi Shradda, Because thecompany device is Little Endian, the Magic word will be output as: x0201 x0403 x0605 x0807 I noticed you have a printf statement in you source, what does this show when you see the magic word? Regards, Justin + diff --git a/data/text/DLP1/900046 b/data/text/DLP1/900046 new file mode 100644 index 0000000000000000000000000000000000000000..ee02eb6a11cc6209374843c7d6b61caf8d8c4c64 --- /dev/null +++ b/data/text/DLP1/900046 @@ -0,0 +1,10 @@ +UCC25705: Switching Frequency + +Part Number: UCC25705 Hi, I want to operate my buck converter at 100KHz with UCC25705 PWM controller. Is this possible? I came across UCC35075 is used one of the evaluation board at 500KHz switching frequency. Hence, I hope UCC25705 also can be used at 100KHz. Can you please confirm? Thanks, Jeyaprakash K + +Hello Jeyaprakash, You can use the UCC25705 in a 100kHz design, please use the calculator tool provided below to cross-check your values: Regards, Sonal + +Thanks Sonal for your prompt response! + +hi, just for clarification, then why data sheet specifies only in the region between 0.9Mhz to 1Mhz. + diff --git a/data/text/DLP1/900049 b/data/text/DLP1/900049 new file mode 100644 index 0000000000000000000000000000000000000000..3e9eb876c39c890ee72fba5f20b6b9216895d1f4 --- /dev/null +++ b/data/text/DLP1/900049 @@ -0,0 +1,12 @@ +TPS62132: Is 2012 Errata still applicable? + +Part Number: TPS62132 Team, Is 2012 errata still applicable for this device family? I see the PCN showing die change to rev F, does that mean all errata items were resolved? Customer is looking to reuse this part on a new design, and would like a confirmation. If you would like to recommend an alternative as well, please let me know. TPS6213x D2 Errata Sept7.pdf Thanks Viktorija + +Viktorija, We did not support theses parts until last year. Since the die revision is now F, I suspect it has all the fixes, but I will have to research it. The support person for TPS62132 is out with COVID19. I am backing him up temporarily, but I have quite a bit in my queue so it may be mid/late next week before I can find out for sure. + +Thanks, John. + +Viktorija, So far as we know all those issues plus some others have been fixed for several years now. + +Thanks, John. + diff --git a/data/text/DLP1/900050 b/data/text/DLP1/900050 new file mode 100644 index 0000000000000000000000000000000000000000..60e7a5239b7299f0fb21d75ce6662e15d96b79b7 --- /dev/null +++ b/data/text/DLP1/900050 @@ -0,0 +1,6 @@ +BQ24195: VSYS / PMID Operation + +Part Number: BQ24195 I have a fundamental question about operation that I was not able to glean from the datasheet. I want to understand the relationship to VSYS and PMID for the 4 following cases: 1) If powered from 5V on VBUS and VBAT = 3.8V: PMID = 5V (follows VBUS) and VSYS = ~3.8V (follows battery) 2) If powered from 5V on VBUS and VBAT = 3.0V: PMID = 5V (follows VBUS) and VSYS = ~3.5V (boost to Vsys_min) 3) If VBUS is not present and VBAT = 3.8V: PMID = 5.1V (boost) and VSYS = ~3.8V (follows battery) 4) If VBUS is not present and VBAT = 3.0V: PMID = 5.1V (boost) and VSYS = ??? (does it follow the battery or maintain the 3.5V Vsys_min) If case 4), can the device boost both PMID and VSYS from a battery below Vsys_min? + +Hi, 1) Yes if VBAT > the minimum system voltage setting. 2) VSYS should be the minimum system voltage setting +150mV. 3) Yes. 4) VSYS still follows VBAT. In boost mode, VBAT (VSYS as well) is the input and PMID is the output. VBAT needs to be above BATLOWV threshold (VBATLOWV set by REG04[1]) in order to support boost mode. If only battery is present and the voltage is above depletion threshold (VBAT_DEPL), the BATFET turns on and connects battery to system, then VSYS follows VBAT. It is highly recommended to get familiar with the BQ24195 charger operation by evaluating the BQ24195 EVM before working on your own design. Thanks, Ning. + diff --git a/data/text/DLP1/900052 b/data/text/DLP1/900052 new file mode 100644 index 0000000000000000000000000000000000000000..51a2fa1be6563576dd6f8c841bf24ff5d4751669 --- /dev/null +++ b/data/text/DLP1/900052 @@ -0,0 +1,10 @@ +DLP3010: Frustrated TIR + +Part Number: DLP3010 In paragraph 3.1.6 of the document DLPA022.pdf you indicate a problem concerning the frustated-TIR. Can you give me how you get to calculate this parameter and get the curve in figure 8? I know that the frustrated TIR is due to evanscent wave and the very thin air thickness between the two prisms. Then an R-TIR prism should not pose this kind of problem since one can introduce a greater air thickness? What is the minimum thickness to avoid this kind of problem in the case of a TIR prism? In order to obtain the best possible contrast which prism is the best? TIR prism or R-TIR prism? Marc + +Hello Marc, Welcome to DLP forum and thank you for your interest in DLP technology. I will follow-up with our optical expert and get back to you on this. regards, Vivek + +Hello Marc, Your observation is correct . The frustrated TIR effect is due to evanescent wave in the thin air gap. The RTIR does not pose the same kind of problem, for two reasons. 1. There is still an evanescent wave at the critical angle in the RTIR prism, but there is no air gap to another element at that surface, so there is no “leakage” of the evanescent wave back into the optical path. 2. The air gap in the RTIR prism is in the illumination path, and both surfaces of the gap are in transmission, not TIR. So, there is no evanescent wave issue at any thickness of air gap in the RTIR design. The thickness can be relatively large, even up to 1mm or so, and therefore the two prisms do not have to be cemented together in close alignment. This eliminates a costly assembly process relative to the TIR prism. The minimum air thickness in a TIR prism is really just a manufacturing issue; some manufacturers can supply prisms with an air gap down to 5 micron reliably. I could not find reference on how to “calculate” the evanescent effect, but I am sure it is well described in a textbook somewhere. The point is that it will be there, unavoidably, because the air gap in a TIR prism has to be very thin in order to prevent astigmatic distortion in the projected image. The smaller the pixel, the smaller the gap has to be to avoid significant MTF degradation due to astigmatism from the air gap. That is one advantage of the RTIR prism in that there is no air gap in the projection path, unlike the TIR prism. Not only that, but the air gap in a RTIR configuration does not cause any evanescent wave issues. Any image distortion issues due to the air gap in a RTIR configuration are in the illumination path, not projection path, so the effects of the distortion are orders of magnitude less evident or critical in the illumination path. When done well, there is little difference in the contrast achievable with either prism type. In both cases, extra attention must be paid to getting the OFF-state light out of the prism without secondary reflections or scattering off prism surfaces or edges that can get back into the projection pupil. Prism edges are notorious scattering surfaces that will essentially become new lambertian light sources when illuminated by OFF-state light. There are more challenges in managing the OFF-state light and the many possible secondary reflections it may have in the prism as well as in the optical engine mechanics for a RTIR prism vs. a TIR prism, but it can be done. regards, Vivek + +Hello Vivek, Thank you for your quick reply. To limit the stray light would it not be appropriate to use absorbent paints on the non-useful faces of the prism which can be in addition to grind surfaces to increase the absorption area.Do you have references of such paintings? I have another question regarding the DLP3010 : on page 18 of the datasheet in paragraph 6.11, I don't understand what the tilt angle error of +/- 1.4 ° corresponds to? Finally, can you tell me where I can find the 3D files (STEP or IGES) of the DLP3010? The exact shape and position of the opening (detail F and G in the package option addendum of the technical sheet) could be useful, as well as its size to add my optical illumination and projection system with sufficient space between the components Regards, Marc + diff --git a/data/text/DLP1/900055 b/data/text/DLP1/900055 new file mode 100644 index 0000000000000000000000000000000000000000..ca2dfc37bbb2a734d1896151dd0b3e1fa687027f --- /dev/null +++ b/data/text/DLP1/900055 @@ -0,0 +1,6 @@ +LM5122: External VCC bias Supply + +Part Number: LM5122 Hi Team, The customer would like to know if he still needs to connect the VIN when using external VCC bias? isn't external VCC bias sufficient for operation? Figure 19 on page 17 for example, there is an external VCC supply, but the pin "VIN" is connected to the voltage "VIN". Why is VIN also needed, isn't VCC sufficient for operation? Checking the Functional Block Diagram on page 14 there is only the regulator connected to VIN. Thank in advance. Regards, Renan + +Hi Renan, If VCC supply is between 9V to 14V, then the internal regulator is disabled. Therefore, VIN is not needed here. However, during start-up, depending on how the customer sets up their system, the VCC external supply may not be there. VCC will need a way to generate the needed voltage, hence VIN as an input to the regulator. Thanks, Richard + diff --git a/data/text/DLP1/900056 b/data/text/DLP1/900056 new file mode 100644 index 0000000000000000000000000000000000000000..bc0a5c7ad3a70531b310ac2cf45d181dcdbb00da --- /dev/null +++ b/data/text/DLP1/900056 @@ -0,0 +1,6 @@ +LM5121: recommended boost + +Part Number: LM5121 Hello team, for a new project I'm looking for a boost powered by a battery, specs are Vin=14V, Vout=24V P=90W and I noticed the LM5121 and the 5122 without disconnection switch. Would there be a multi-phase controller (I would like to make my converter with 2 phases) that also manages synchronous rectification (therefore with integrated boostrap)? Even one without synchronous rectification could work for me. I would prefer to have a controller with integrated peak current mode. Please let me know what your suggestions are. Thanks and best regards, Adrian + +Hi Adrian, The 5122 is a synchronous controller and can implement dual-phase interleaved boost. It also utilizes peak current mode control. Please see section 8.1.3 of LM5122 datasheet for interleaved operation. This reference design (/tool/PMP9309) may be a starting point for your application. Keep in mind that you do not need to have the op-amp circuit as noted in the design. Thanks, Richard + diff --git a/data/text/DLP1/900058 b/data/text/DLP1/900058 new file mode 100644 index 0000000000000000000000000000000000000000..0d12259d4daefbacc5b772bfba1f9702a64d9271 --- /dev/null +++ b/data/text/DLP1/900058 @@ -0,0 +1,6 @@ +UCC2800: Error amplifier current limit range - 0.9V to 1.1V? + +Part Number: UCC2800 Hello. I see the CS pin has a range of 0.9V to 1.1V range for current limiting operation, but this amounts to a large range of load current in the end product. Am I missing something? If not, is there a tighter tolerance chip that would limit the range better? Thanks. + +Hello Jeff, The maximum amplitude of the CS pin is 1V; at this voltage the controller will start current limiting. The 0.9V and 1.1V are the values including factors like: the -55deg to 125deg spread of temperature, unit to unit variation, some hysteresis on the internal comparator etc. I hope this answer your question. Regards, Sonal + diff --git a/data/text/DLP1/900063 b/data/text/DLP1/900063 new file mode 100644 index 0000000000000000000000000000000000000000..2f74d01a5776700d339c3b14a70ecfd23d4bd3c9 --- /dev/null +++ b/data/text/DLP1/900063 @@ -0,0 +1,16 @@ +BQ24620: ISET Voltage Jump + +Part Number: BQ24620 Hi, We have a BQ24620 board design that closely follows thecompany demo board. We are setting the charge current to 1.25A and the voltage to 14.4V. During testing we are getting some strange results on the ISET pin. As long as the R18 is below 7KOhms, all works exactly as expected. At or above 7KOhms ISET voltage makes a sudden jump: R18=5KOhms, V=0.16V R18=6KOhms, V=0.19V R18=7KOhms, V=0.35V R18=8KOhms, V=0.38V R18=9KOhms, V=0.41V R18=10KOhms, V=0.43V R18=18KOhms, V=0.60V Our R21 is set to 100KOhms and our sense resistor is set to 0.01 Ohms. Thanks, Alex + +Hi Alex, I am a little confused what you mean by ISET voltage jumps. This voltage is sourced externally by the user, through the use of an external voltage source, or to use a resistor divider from an available rail like VREF. The main point is that this is set externally by the user. The only issue you would run into is if you try to source more than 2V, as that is the max voltage that can be applied to this pin, but you are not exceeding this. From your measured values, the resistor divider is giving incorrect results for R18 = 7k and above. (5k and 6k are correct). To verify if the BQ24620 is operating correctly, we can check the measured charge current, according to what voltage is being sourced on VISET (can also use an external voltage on this pin to make testing easier.) For above results, also log the measured VREF. If there is an issue with charge current based on sourced VISET, or the VREF value then we can debug as this would be an issue with BQ24620. However if above is all valid, and the voltage from the voltage divider is incorrect, then this is a board issue not related to BQ24620 performance. + +Hi Kedar, Here is the new testing data: R18=6KOhms, VISET=0.19V, VREF=3.3V, Current=0.9A R18=8KOhms, VISET=0.38V, VREF=3.3V, Current=2.2A R18=10KOhms, VISET=0.44V, VREF=3.3V, Current=2.3A R18=14KOhms, VISET=0.49V, VREF=3.3V, Current=1.6A R18=18KOhms, VISET=0.60V, VREF=3.3V, Current=2.2A What do you think? Alex + +Hi Alex, Your measured results are interesting, as the charge current does not correlate even to what ISET voltage you are measuring. I suspect something regarding layout. Are you able to share your layout and schematic with me regarding the BQ24620 portion of your system with me so I can review and take a quick look? I have sent you a friend request through which you can share it privately. + +Hi Kedar, Here is the photo of the board. Thanks, Alex + +Hi Kedar I did some more testing and have some more data. The original observation of the strange change in the board functions looks like was caused by the mode change from non-synchronous to the synchronous. Here are the gate signals for the HI and LOW FETs in the non-synchronous mode (taken separately): Later, I also changed the sense resistor from 0.01Ohms to 0.05Ohms, limiting the maximum current to 2 Amps, but also boosting the resolution. I took some readings in the synchronous mode. The LOW FET gate signal was 0V all the time in this mode (no PWM). Here is the gate signal for the HI FETs in the synchronous mode with 0.05Ohm sense resistor, 84K-100K divider configuration and the VISET at 1.5V: With the divider at 40K-100K, VISET at 0.94V and the 0.05Ohm sense resistor the HIGH FET gate looks like this: I will provide more data tomorrow. Thanks, Alex + +Hi Kedar, Here are some additional observations. The first image below is showing the HI (yellow) and LOW (green) FET gate signals. The second image is showing the BTST (yellow) and PH (green) signals. What I do not yet understand, if the LO FET never opens, how does the PH go to 0V on every PWM cycle and how does the capacitor keep 6V? Thanks, Alex + diff --git a/data/text/DLP1/900078 b/data/text/DLP1/900078 new file mode 100644 index 0000000000000000000000000000000000000000..f9d2858e22e4e771c70a23289e0533888d57dd2b --- /dev/null +++ b/data/text/DLP1/900078 @@ -0,0 +1,8 @@ +CCS/IWR6843AOPEVM: 6843 EVM Can't work vital sign lab + +Part Number: IWR6843AOPEVM Tool/software: Code Composer Studio Dearcompany We run vital sign lab on 6843AOP EVB but always NG . We don't change any thing and this module can run other labs normally . We show some information for reference . Can help to find out what is the root cause ? IC issue or application lab sensitive to use ? Our boss try many module for verifyt his but vital sign lab is sensitive to PCB hardware. , now we verifycompany mmwave AOP EVM the result is can't work , It's means vital sign only for demo use ? Error message shows at mss line 635 . BR + +Hi Agate, The IWR6843AoP version of the Vital Signs lab requires the mmWaveICBOOST in order to run. Please note that support for this lab is limited on E2E Forums. Regards AG + +Dearcompany Why need mmwaveICBOOST to run? We are step by step key in cfg setting to module , the message show mss error at line 637. BR + diff --git a/data/text/DLP1/900080 b/data/text/DLP1/900080 new file mode 100644 index 0000000000000000000000000000000000000000..28a5050e4edd1b374487a5362097c2850341f6c0 --- /dev/null +++ b/data/text/DLP1/900080 @@ -0,0 +1,10 @@ +TPS1HB16-Q1: DIA_EN PULLED HIGH + +Part Number: TPS1HB16-Q1 Is it okay to just pull the DIA_EN pin high and still be able to use the diagnostic functions of the chip. We don't have enough pins left on our microcontroller and want to make sure the part will still work correctly if we do this. The data sheet says this pin is active high and as far as we can tell, it doesn't explicitly say that the part needs to see a transition from low to high on this signal. But we wanted to confirm this. Thank you. + +Neal, Yes. It is OK to pull the DIA_EN pin high for this device. Not when diagnostics are enabled the current consumption will be slightly higher on the device. + +Hi Timothy, Thank you for the quick reply and for pointing out the increased current consumption. One other question we have is if it would be okay to tie ENABLE and LATCH together? Thank you, Neal + +Hello Neal, You should be able to connect ENABLE and LATCH together- although there is a caveaut. The LATCH pin is used to reset the device when an over current event occurs (such as a short-to-ground). If you pull the pin high and are unable to control it from your MCU you cannot "reset" the switch in case of a fault condition. + diff --git a/data/text/DLP1/900086 b/data/text/DLP1/900086 new file mode 100644 index 0000000000000000000000000000000000000000..9241eeda0c909cc634c4029b67ecab9c1c921bd9 --- /dev/null +++ b/data/text/DLP1/900086 @@ -0,0 +1,6 @@ +BQ25306: Can offer the full datasheet? + +Part Number: BQ25306 Hi team , My customer just find a simple datasheet of BQ25306 in . Can you offer the full datasheet ? Thank you! + +Troyson,Please go to /product/BQ25306?qgpn=bq25306 Scroll down and you will find: Request samples and more Information Full data sheet is available. Request now + diff --git a/data/text/DLP1/900092 b/data/text/DLP1/900092 new file mode 100644 index 0000000000000000000000000000000000000000..7475d0182ab98cb84dc0bd4c928ae4d1dd57cf3f --- /dev/null +++ b/data/text/DLP1/900092 @@ -0,0 +1,10 @@ +UCC23511: Driving MOSFET pair as SSR ; simplifying TIDUC87A? + +Part Number: UCC23511 Can UCC23511 (or similar) be used along with 2 N-MOSFETS to get a simple, isolated SSR replacement? Assuming that the gate-side supply is provided through other means and is also isolated from the control domain. I am looking at the TIDUC87A app note for SSR replacements, but the isolated control and gate drive block shown in Fig 11 does have quite a few parts. In my application, this will be repeated x8, so reducing complexity and part count is of interest (and, hopefully, simplicity of hardware verification), even if it is slightly more expensive. If this appears in any existingcompany reference designs or app notes, please let me know. + +Hi, Apullin, Yes, you can, the only trick is you need an isolated power supply to drive the UCC23511. Here is an example of one: Just drive your two fets source to source and connect the common point from the driver to that note and you will be all set. If this answered your question, please press the Green button. If you have further questions, let us know! + +Great! I can eliminate ~100 parts from the BOM with this. One follow-on question: The SLLU282A note you provide uses SN6505B and a transformer for a truly galvanically isolated supply. Could an implementation follow TIDUC91, where the isolated-side VCC of the UCC23511 could be "self-powered" from the load domain, especially given that it is already LV AC (HVAC)? (assuming a complete supply there, e.g. rectification, vreg, uv lockout) However, I do see the potential advantage of using a single transformer + driver to make an isolated supply that could drive the whole gang of 8 drivers on a single dedicated supply. The hesitance to do that is adding a wound transformer to the board is not easy due to the part height and footprint. + +Hi, Apullin, Let me ask my colleague to comment on TIDUC91 for you. + diff --git a/data/text/DLP1/900095 b/data/text/DLP1/900095 new file mode 100644 index 0000000000000000000000000000000000000000..4fe4c1de174a544fa1f77e75513148706efd5d8a --- /dev/null +++ b/data/text/DLP1/900095 @@ -0,0 +1,12 @@ +BQ24765EVM: ac power problem + +Part Number: BQ24765EVM Hello, I am following the user manual for BQ 24765 on page 6. /lit/ug/sluu415a/sluu415a.pdf?ts=1587751942176 When I turn PS 1 on the diode D7 lights up. However, when I turn on PS 1 D5 does not turn on. Neither does any of the other diodes and the voltages are not correct. For instance, V(TP(ACIN)is -0.4V. The voltage reaches J1 on the circuit board but nothing else. Is this definitely related to the board and could this be a problem with the board? Thank You + +Hi, Based on your observation that ACIN = -0.4 V, it definitely sounds like something is wrong with the hardware - perhaps a broken trace or an un-soldered pad. The ACIN voltage is set by a resistor divider from the adapter to ACIN to GND. The ACOK LED (D5) cannot turn on unless ACIN > 2.4 V. Can you please check to see whether the adapter voltage reaches TP2 (VIN)? If it does, then can you check the soldering for R2 and R3 to see why the ACIN voltage is incorrect? Best regards, Angelo + +Hi there, Can you confirm that the board's jumper configuration is in the factory default state as per the table of section 1.4 in the EVM user guide? The ACIN Test Point (TP3) is in the middle of a resistor divider directly between J1 PWR and GND, so it is a good starting point to debug. Do you have a way to measure the input current at J1 and can you confirm that it is less than an amp (assuming you don't have a load applied at J10 connector and aren't charging.) Do you measure the J1 voltage at TP2? If you have a multimeter that can measure resistance, can you remove the power from the board and measure the resistance from TP2 to TP3 and then from TP3 to TP1 (GND)? The first measurement should be close to 430K and the second should be close to 66.5K. If you can let me know what you measure at some of these points, we should be able to narrow down the source of the issue. If you are measuring 20V at TP2 and -0.4V at TP3, then I don't see an explanation other than R2 is open, R3/C4 is shorted, or the IC is damaged (the ACIN pin should be high impedance.) Regards, Steve + +Hello Angelo, Thanks for your help. TP2 is the same voltage as Vin. R2 and R3 seem to be the problem. After writing the previous sentences, I touched the multimeter probe a few more times to R2 and R3 and their voltages changed and the LEDs came on. Other than that I changed nothing. Maybe I wiped off some material on the resistors. I am confused but it works now. Thank You, Brendan + +Hi Brendan, Great, thanks for the update! I'm glad the issue is resolved. I will close this thread for now, but feel free to let us know if you run into any other issues. Best regards, Angelo + diff --git a/data/text/DLP1/900101 b/data/text/DLP1/900101 new file mode 100644 index 0000000000000000000000000000000000000000..5731b41265dbb04d0ff02aa331c58b53aa142111 --- /dev/null +++ b/data/text/DLP1/900101 @@ -0,0 +1,6 @@ +UCC25705: switching freqency + +Part Number: UCC25705 is this ic will work at lower switching frequency like less than 100Khz. just i need to select the Rt and Ct value like other controllers to achieve 100khz + +Hello, You can use the UCC25705 in a 100kHz design, please use the calculator tool provided below to cross-check your values: /.../slvc008 Regards, Teng + diff --git a/data/text/DLP1/900105 b/data/text/DLP1/900105 new file mode 100644 index 0000000000000000000000000000000000000000..6d4e5d022fc08ecffdbed033fb929886c33fae81 --- /dev/null +++ b/data/text/DLP1/900105 @@ -0,0 +1,8 @@ +LM2594: LM2594 / LM2594HV Protection Features: Current Limit and Thermal Shutdown + +Part Number: LM2594 Dear Sir /Madam, Would you mind elaborating more on the LM2594Protection Features such as Current Limit and Thermal Shutdown? Does the device recover itself and continue normal operation after detecting such fault? Or does it require a power cycle to get back to normal? Thank you -Arief + +Hello Thank you for choosingcompany as your component supplier of choice, and thank you for reaching out to us with your questions regarding the LM2594 family of DC/DC converters. Let me try to answer your questions as best as I can. 1. The LM2594 has thermal shutdown, current limit and short circuit protection. 2. Unfortunately, we do not have data for the exact values of the TSD trip points. However, I would guess that they are in the region of shutdown at 150°C and recovery at 140°C. The recovery is automatic and requires no power cycle, etc. 3. The current limit is cycle-by-cycle. Once the inductor current hits the current limit, that switching cycle is terminated. The next clock cycle will turn the power switch back on. This is your typical cycle-by-cycle current limit operation that is common to many buck regulators; no power cycle, etc. is required. 4. The short circuit protection begins to operate at approximately 10% above the first current limit level, mentioned above. With very heavy overloads, and/or short circuit on the output, the inductor current can exceed the first current limit threshold. This can occur due to inductor saturation and/or delays in the current limit comparator. If the inductor current reaches the +10% level, then the switching frequency will begin to fold back. This will help to give the inductor more time to release its stored energy and prevent inductor current run-away. Once the overload is removed, the device will function normally; no power cycle, etc. is required. This method is also commonly found in many DC/DC converters. 5. Of course, all of these protection methods cannot ensure that the device will be "bullet proof" against all types of abuse. However, they are most effective when the device is used within the recommendations and guidelines provided in the device data sheet and any pertinent app notes. 6. All of the above applies to the LM2595 and LM2596 family of devices as well. I hope that this has helped to answer your questions. If I can help you with anything else, please do not hesitate to ask. Again, thank you for choosing TI,and have a nice day. Sincerely, Frank D + +Hello Sir, Thank you for a very detailed answer on the protection features on LM2594. This will be a very useful information for all customer using the LM2594 / LM2594 HV Thank you -Arief + diff --git a/data/text/DLP1/900106 b/data/text/DLP1/900106 new file mode 100644 index 0000000000000000000000000000000000000000..894f9d93a81ca74e812b179abc043c8f999b26a6 --- /dev/null +++ b/data/text/DLP1/900106 @@ -0,0 +1,16 @@ +UCC256404: Using this part for multiple outputs + +Part Number: UCC256404 Hi Team, I am posting this inquiry on the customer's behalf. The customer would like to use UCC256404 in his new design (changing the UCC256301 to UCC256404 because their power requirements increased) in the image below: Here's the question from the customer: The customer plan on having 4x outputs. One 40V output that the voltage feedback will sense. A 400V output, and two housekeeping outputs. There are conditions where the 400V output will need +700W while the 40V output is essentially unloaded. They are curious about cross regulation performance with multiple outputs for the LLC controller. Specifically, concerned about how the control loop will respond as the loads change on the various outputs. Also, curious about how the control loops handle transients and steady state operations when supplying power to multiple transformer outputs. If the control loop regulates the voltage based on an unloaded output, what happens to the other outputs when they're at full power? Please let me know if you need more information. Thanks! Jonathan + +What is the 40V output load range? In general, the feedback should be from the highest rated load output, especially when considering the transient. The output with feedback loop connection will be regulated and compensated by the loop either in steady state or transient, other outputs are cross-regulated. The cross-regulated outputs may not have good regulation and transient response if the leakage inductance is high. + +The 40V supply load range is 0-10A. There's also the possibility that charge will be dumped onto the 40V rail from the load, which would raise the voltage. The 40V rail powers a motor that can do regenerative braking. + +Which output needs most accurate regulation and minimum undershoot/overshoot? After you decide this, you should put the feedback loop to that output. You can also use weighted feedback if both 40V and 400V share the same output ground. + +If both 40V and 400V outputs require very good regulation, you can have a post regulation on 40V. + +Would the SIMPLIS model give me accurate results for what the control loops will do when I have transients on the outputs? I understand the leakage of the various outputs will have a strong effect on the cross regulation performance. I'm more concerned about the IC entering into a skip mode when the 40V output is unloaded (or has charge dumped onto it), while the 400V rail is outputting maximum power. + +It will depend on how you model the leakage inductance which may not reflect reality of your transformer. You can list each output regulation requirement, transient requirement, load range, then decide to use the most required output for your feedback loop. If you have two outputs with similar requirements, you need to consider additional techniques such as weighted feedback or post regulation. + diff --git a/data/text/DLP1/900120 b/data/text/DLP1/900120 new file mode 100644 index 0000000000000000000000000000000000000000..b71185a940d7f8ce5a4d28957a2648128370c052 --- /dev/null +++ b/data/text/DLP1/900120 @@ -0,0 +1,10 @@ +TPS55288: Looking for detailed data sheet showing efficiency curve over load and voltage + +Part Number: TPS55288 Looking for detailed data sheet for the pre-release of the TPS55288. The efficiency of 97% isn't really backed up in the data that is present on the web. + +Dear Sir, What is the Vin, Vo and the Io? We can discuss it by email. + +Helen, Looking for efficiency curve not just raw numbers. Sometimes these types of devices have peak efficiencies at one operating point only and fall off to sub 90% efficiency outside of this operating point. The preliminary datasheet only specifies one operating point where it's 97% efficient. Is that in buck or boost mode? I'm also a little puzzled why the two external FETs needed for the buck leg. Typically an internal FET design one would see the FETs all internal or external and then called a controller. In the particular configuration I'm interested in the working parameters would be: 9V to 30V input Variable output voltage (5v, 9V, 12v, 18v) in various use cases Current would be 1.5A to 3A for the above use cases. Could you provide efficiency numbers for these four voltage outputs at 1.5, 2.0, 2.5 and 3.0 amp loads under a 9 to 30V input? Many thanks. + +Dear Sir, The BUCK FET is a must because of the logic requirement. Please check the attached ppt for the eff curve. Not have Vo=18V data. But it is between Vo=15V and Vo=20V. 400kHz_IPZ40N04S5L-4R8_nosnubber.pptx + diff --git a/data/text/DLP1/900121 b/data/text/DLP1/900121 new file mode 100644 index 0000000000000000000000000000000000000000..019a0c2cc636207043eb8e54ebd1b86cb3a93ca4 --- /dev/null +++ b/data/text/DLP1/900121 @@ -0,0 +1,8 @@ +TPS25926: How to reversed bias to generate heat + +Part Number: TPS25926 Hellocompany Team, We are developing a thermal validation vehicle. We do not expect the board to be functional. The goal is to replicate the power dissipation of the main ingredients of the production board. To do so we are applying reversed bias connection to some devices like voltage regulators, so the body diode of the FET generates heat. We would like to do the same to the by applying power to the TPS259261 by: Applying 12V to OUT pins (8,7,6) and GND (Thermal Pad -11) Apply Ground to VIN pins (5,4,3) We would be using a controlled power supply to limit the current so we just to generate the expected power per our thermal simulations. Do you think is this doable? Are these the right pins to be connected, is there any other pin termination we should take into account? Thanks in advance -Eduardo + +Hi Eduardo, Welcome to e2e forum ! Both the methods that you intend to use below are not recommended operating conditions in general. Since you intend the boards not to be functional and just replicate the power dissipation of the IC. I would recommend you go with the following approach but please make sure the continuous current flowing in the body diode is not greater than 0.5 A (you can set a current limit to the power supply). Applying 12V to OUT pins (8,7,6) and GND (Thermal Pad -11) + +Hi Praveen, Thanks a lot for your answer. This solves our issue. + diff --git a/data/text/DLP1/900124 b/data/text/DLP1/900124 new file mode 100644 index 0000000000000000000000000000000000000000..2290102126c2fc9cf7383a3875495e87e68c5538 --- /dev/null +++ b/data/text/DLP1/900124 @@ -0,0 +1,6 @@ +TPS1HB16-Q1: ENABLE and LATCH + +Part Number: TPS1HB16-Q1 Hi Timothy, Thank you for the quick reply and for pointing out the increased current consumption. One other question we have is if it would be okay to tie ENABLE and LATCH together? Thank you, Neal + +Hello Neal, You should be able to connect ENABLE and LATCH together- although there is a caveaut. The LATCH pin is used to reset the device when an over current event occurs (such as a short-to-ground). If you pull the pin high and are unable to control it from your MCU you cannot "reset" the switch in case of a fault condition. + diff --git a/data/text/DLP1/900125 b/data/text/DLP1/900125 new file mode 100644 index 0000000000000000000000000000000000000000..f9e73588919bd4ed21ab27513d5ebebb7818cb98 --- /dev/null +++ b/data/text/DLP1/900125 @@ -0,0 +1,8 @@ +LDC2112: Plan for automotive qualification? + +Part Number: LDC2112 I like the ability of the LDC2112 to operate in stand-alone mode without an external MCU. My application is automotive. From what I can see, the only automotive-qualified LDCs are LDC1612/4 and LDC1312/4, neither of which can operate in stand-alone mode. Are there plans (and maybe a timeline) to have an automotive-qualified LDC2112 or similar part? Thank you, Anne + +Hi Anne, Can you send me a private message so we can discuss the LDC roadmap offline? Also, please note that the LDC2112 registers do need to be programmed by an MCU whenever it powers on; after this the MCU can be put in sleep mode and the LDC2112 will operate independently. Best Regards, + +Thank you! I guess I didn't read far enough into the data sheet to realize it needed to be programmed at power-on. I was hoping to reduce cost in the circuit. I'll send you a message about the roadmap. Anne + diff --git a/data/text/DLP1/900129 b/data/text/DLP1/900129 new file mode 100644 index 0000000000000000000000000000000000000000..0eff9e6fa285be1a0b280c87f16394587972e42d --- /dev/null +++ b/data/text/DLP1/900129 @@ -0,0 +1,12 @@ +LM5050-1: Connecting "IN" further upstream to reduce losses + +Part Number: LM5050-1 The LM5050 datasheet says that it is designed to regulate the voltage across the MOSFET to 22mV if possible. Otherwise it will saturate the gate voltage to about 12V. When using a low Rds MOSFET (1m Ohm), it seems the LM5050 will be holding the MOSFET Vds at 22mV for currents less than 22A, when the MOSFET could achieve lower Vds if the gate was driven harder. At a nominal current of 10A (with Rds = 1m Ohm), forcing Vds=22mV creates about 0.22W of power dissipation, when it may be as low at 0.1W if the gate was driven hard enough. In the example circuit shown here (TPS2493 followed by an LM5050) are there any drawbacks to moving the connection of the "IN" pin of the LM5050 directly to the source voltage, so that the drop across the 1m Ohm sense resistor and the hot-swap MOSFET are combined in to the 22mV that the LM5050 is trying to servo? Thanks for any insights, Will + +HI Will, Connecting IN before Hot-Swap is not recommended, because when hot-swap is off, IN-OUT voltage would be higher than normal operation. IN-OUT is not rated more than 2V drop in the forward direction. Regards, Kari. + +Hi Kari, Thanks for the quick reply and concise answer. Is this 2V rating listed in the datasheet or some app note? I don't recall running across the 2V rating. Thanks, Will + +Hi 2V rating is not listed in the datasheet or an app note. Regards, Kari. + +Kari, Thanks for the followup. Will + diff --git a/data/text/DLP1/900133 b/data/text/DLP1/900133 new file mode 100644 index 0000000000000000000000000000000000000000..c631207dae89ead785d6e878713c2354fd753726 --- /dev/null +++ b/data/text/DLP1/900133 @@ -0,0 +1,8 @@ +BQ28Z610: What is the condition to clear GaugingStatus[BAL_EN] flag? + +Part Number: BQ28Z610 Hello, What could be the reason GaugingStatus[BAL_EN] flag is cleared? I tried testing the cell balancing function by using 2 cell batteries with different voltages. I noticed that after a while, GaugingStatus[BAL_EN] becomes low although QEN flag and GAUGE_EN flag are still high. If I send a GAUGE_EN() command from bqstudio, QEN flag and GAUGE_EN flag become low and BAL_EN goes high. I want to know if I can rely on bq28z610 to do cell balancing automatically or I have to periodically check the BAL_EN flag and take action accordingly. I have looked at the TRM but there is no mention on the condition of BAL_EN flag. Thank you. + +Please refer to the cell balancing section in the TRM. Thanks! + +I did and there is no mention of BAL_EN bit in that section at all. + diff --git a/data/text/DLP1/900134 b/data/text/DLP1/900134 new file mode 100644 index 0000000000000000000000000000000000000000..589cbfb85d4a59072b3fc928f378bdad775db5b7 --- /dev/null +++ b/data/text/DLP1/900134 @@ -0,0 +1,10 @@ +BQ27542-G1: 1500uA current leak incompany battery gauge + +Part Number: BQ27542-G1 Hello, I have a standalone / removable battery pack with: - the battery chemistry, Poly 3.7V one-cell 1000mAh - a battery protection IC DW01-P from Chinese Fortune - a battery charger LTC4067 from Linear - a battery gauge BQ27542. Without thecompany battery gauge BQ27542, the current leak (the current measured at the pin + of the battery chemistry) is around 150 uA. With thecompany battery gauge BQ27542, the current leak is around 1750uA. So BQ27542 is using around 1.5mA which is a lot. It will drain the battery in one month. And it's what I'm seeing. Is it normal to have such high current leak for BQ27542? Is there a way (software settings) to lower that amount? PS: I can provide the schematics in a private message. + +Hello Gregoire, Sure, please request me as a friend. You need to check the pull up resistors for comms. It may not be the gauge pulling but other external networks. + +You mean the pull-up resistor on the I2C line? There is none in the battery pack. It's on the device side when the battery is inserted. Also, the current measurement seems pretty accurate as it's done with the "Current Ranger" tool. + +Okay, I've sent you a message. Closing this thread out. + diff --git a/data/text/DLP1/900135 b/data/text/DLP1/900135 new file mode 100644 index 0000000000000000000000000000000000000000..fce9e6bab108cf1f2523b5c944780f3d67ee657c --- /dev/null +++ b/data/text/DLP1/900135 @@ -0,0 +1,10 @@ +TPS4H160-Q1: Diagnostics issue with TPS4H160-Q1 version A + +Part Number: TPS4H160-Q1 Hi Team, We have a customer with a custom board that uses TPS4H160-Q1 version A and they are having trouble with the diagnostics. The status pins are acting unexpectedly. the product should report faults individually on each channel but they seem to all trip under overcurrent conditions. The customer is mainly concern with the diagnostics of this device. There seem to be some unexpected results when the current limit is exceeded. The customer wants to know any issues with the diagnostic STx pins for this device because they can't seem to get the device to report faults independently from the other channels Some other questions: If they exceed the external current limit on the device on one channel, should the device indicate a fault on that same channel? And how long should it take for the device to automatically recover from this fault condition? Let me know if you have any questions with the customer. Thanks, Jonathan + +Hello Jonathan, Without any scope shots or schematics we cannot really determine what the fault line is indicating. The fault table is listed below in the datasheet: So it really could be any one of these or a combination of all. To answer your questions... On the A version of the device there are four different open drain ST pins that will report the fault condition independent of what the other channels are doing (assuming that the entire device didn't hit thermal shutdown). On the B version this is reported through the current sense pin and all channels are ORed together. It really depends on the fault condition. If it is thermal studown then the device will recover when it cools down enough to the reset level (155C). If it is an open load then the fault will be cleared when a load is attached. It really depends on the setup. + +Hello Timothy, Thank you for your time and thoughtful response. I apologize for my tardy response, I needed to clear the release of information with my teammates. Your component is connected to 8 micro-controller output pins. The schematic below displays how it is connected on the PCB: The external current limit is set at 400 mA as shown above, the output voltage delivered to the load is 24V, and an adjustable power resistor (~60 ohm) was used to test the load conditions. For the sake of being thorough, this device is also connected to a level shifter to adjust the logic voltages (measurements collected for scope pictures) from 1.8V to 3.3V. These schematics are displayed below: The first round of testing was performed without a load attached and was designed to test the logic signals that the device was generating before delivering power. This waveform is what I would expect during normal operation: The second test displays the full recording of the operation test when the status pins have not been stressed by an overload condition. The erratic behavior of the status signals is associated with the programming of the FPGA in Vivado. The third test was the first overload test condition. In this example, the erratic behavior is gone during the FPGA programming and all of the status pins are driven low immediately. Only the LSB signal [3] was stressed with this condition. The biggest problem that I have encountered with this condition is that once the status signals are triggered, it is exceptionally difficult to them to reset out of the fault condition. On multiple occasions, I have not been able to to get the device out of fault for an entire day. Sometimes it resets on my first attempt at testing during a day, but I also left it all last weekend and it was still in fault this morning. I have never been able to see a transition in the status signal; it is either 0 or f for the duration of the experiment (aside from the erroneous programming behavior). Any help you could offer would be much appreciated. If you have any other questions, or my response needs any clarification, please feel free to reach out. I am at my wits end here.. ~Jeff + +Hi Timothy, Thank you for your support and answer to my above question. Our customer sends a response with their schematic design and measurement. Due to the document is private. I hope it is okay with you to discuss this offline. Regards, Jonathan + diff --git a/data/text/DLP1/900146 b/data/text/DLP1/900146 new file mode 100644 index 0000000000000000000000000000000000000000..9a1317597fe5478632010437f548ef164ca8540a --- /dev/null +++ b/data/text/DLP1/900146 @@ -0,0 +1,6 @@ +LM317: Driving output above regulation setpoint voltage + +Part Number: LM317 I have a need for a circuit that typically is operated from an adjustable regulated source, but occasionally needs to be connected to an alternate supply at a voltage higher than the regulated source output. Regulation is not critical when driven from the alternate supply. Many topologies could allow this, but for simplicity I wish to simply connect the higher-voltage supply to the load in parallel with the regulator output (as per the diagram below) if this is acceptable. From the information in the data sheets and application notes, it appears that the LM317 can source (but not sink) current and this will be OK as long as the LM317 output voltage remains below the input voltage (and other maxima are not exceeded). As the LM317 does not sink current, I expect the output voltage to rise above the regulation voltage when the alternate supply is connected. In some respects, this seems similar to operating the LM317 with insufficient output load current to maintain regulation. The external D1 protects the LM317 if Vout > Vin. My question: Is it correct that the LM317 should not be damaged by raising the output voltage above the regulation set-point voltage, as long as Vout does not exceed Vin, and therefore this kind of operation is acceptable? Are there any issues with this kind of approach? Thank you for your consideration. + +Hi Andrew, On the surface, it looks like this design approach might work, as long as the abs max conditions are not violated as you have mentioned. It is not something we have prototyped so you may want to obtain an evaluation board and test the theory prior to placing it into your application. Another option is to use a diode-OR approach for both power sources if you can tolerate the small diode drop. Yes, linear regulators cannot usually sink current, only source it as you have mentioned. Some modern linear regulators have an internal pull down circuit on the output to keep the output from overshooting too much. I don't believe that circuit exists in these older devices, such as the LM317, so you should be safe from that aspect. I wanted to mention this just in case you decide you need a newer device. If so, you should look for a device without that feature listed in the datasheet. Thanks, - Stephen + diff --git a/data/text/DLP1/900150 b/data/text/DLP1/900150 new file mode 100644 index 0000000000000000000000000000000000000000..e7b13e996a9efe9e94d2eb26dd928c1910124f26 --- /dev/null +++ b/data/text/DLP1/900150 @@ -0,0 +1,6 @@ +LP5569: Is the V1P8 pin really just a logic reference? + +Part Number: LP5569 I started with the LP55231 on my project but realized I needed a sinking driver instead, so I ended up at the LP5569. There are many similarities but the most notable exception is V1P8 on the LP5569. The datasheet says it is the "Input power for digital circuitry" but with current draw under 200 µA and none of the digital inputs limited to a value relative to V1P8, is it really just a logic reference for the digital circuitry rather than an actual power supply? To make a long story short, I'll power the LP5569 from a 5V rail and I'm considering using a super cheap 1.8V reference for the V1P8 pin rather than a regulator, and leaving the I2C lines pulled up to the MCU's 3.3V logic. Is there any issue with this approach? + +Hi Ryan, Yes it is OK. V1P8 is the power line for internal digital circuits but the VIH and VIL for SCL/SDA pins is set at a fixed value. Just make sure your logic supply follow the requirement at datasheet section 7.8 Logic Interface Characteristics. + diff --git a/data/text/DLP2/748143 b/data/text/DLP2/748143 new file mode 100644 index 0000000000000000000000000000000000000000..120a729e94920fa54bf9f4a387ac8a8d9bcca242 --- /dev/null +++ b/data/text/DLP2/748143 @@ -0,0 +1,6 @@ +[FAQ] Ultrasonic Sensors + +Ultrasonic sensing uses the propagating sound waves at a frequency above the range of human hearing (>20kHz) that can travel through a wide variety of mediums (air, fluid, or solid) to detect objects, measure distance, or track disturbances. Ultrasonic sensors can be used to detect a wide variety of materials regardless of shape, transparency, or color. For an overview on ultrasonic sensing fundamentals,company recommends you begin by reading the Ultrasonic Sensing Basics application note.company offers a variety of ultrasonic sensing ICs. The objective of this FAQ is to help recommend a specificcompany ultrasonic sensing device based on the application use-case and system requirements. Ultrasonic Sensing Application Measure Distance and Proximity Measure Level or Height of Liquid or Solid Measure Flow Rate and Direction of Liquid, Gas, or Heat Measure Concentration and Material Identification Object Tracking and Mapping Material Thickness and Flaw Detection Monitor Changes to Environment Description Use a single sensor to both generate and capture a round-trip time-of-flight echo to measure the distance between the sensor and the targeted object. Use a single sensor to both generate and capture a round-trip time-of-flight echo to measure the distance between the sensor and the targeted object. Use two sensors to capture the difference of transit time propagating in and against the flow direction as an independent upstream and downstream measurement. Use a single sensor to both generate and capture a round-trip time-of-flight echo to measure the changes in the speed of sound based on a fixed-known distance. Use at least two transducers with a fixed-known distance between on another. One transducer must always be used to generate and capture a round-trip time-of-flight echo, while the other transducers must only capture the round-trip time-of-flight echo. By comparing the resulting time of flight differences through triangulation. Use a single sensor to both generate and capture a round-trip time-of-flight to measure the thickness of a solid object, and determine if there are any voids within the solid. The transducer face must be made to couple to the solid material type for direct transducer to solid contact. Use two transducers, one to continuously generate the ultrasonic echo, and the other to continuously capture the difference in return echo zero-crossing frequency (Doppler shift).company Top Device Pick PGA460 TUSS4470 MSP430FR6047 TUSS4470 TUSS4470 TUSS4440 TUSS4470 Why Top Pick The PGA460 was designed specifically to measure distance using ultrasonic time-of-flight. The integrated driver, receiver, ADC, and digital signal processing logic simplifies the steps required to capture this time-of-flight data. The TUSS4470 supports the widest range of transducer frequencies from 30kHz to 1MHz to measure height from the top pointed down through air, or from the bottom pointed up through liquid. The customer organization MSP430FR604x and MSP430FR603x family of ultrasonic sensing and measurement SoCs are powerful, highly integrated microcontrollers (MCUs) that are optimized for water and heat meters. The TUSS4470 supports the widest range of transducer frequencies from 30kHz to 1MHz to properly couple the transducer and enable this measurement through nearly all gases, liquids, or solids. Multiple TUSS4470 devices can be easily synchronized due to the device’s ability to independently enable the receiver path regardless of the driver block’s state. This means the start of the pulse generation can be used as the sole time-of-flight origin reference for all devices. To propagate sound waves through a solid, a large amount of sound pressure must be generated by using a transformer driver. The TUSS4440 is able to generate hundreds of volts to excite transducer, while normalizing the time-of-flight echo response regardless of the flaw dimensions. The TUSS4470’s built-in zero-crossing feature allows the receiver to continuously monitor the incoming echo frequency. If the object is approaching the sensor, the zero-crossing frequency will increase, while an object leaving will cause the zero-crossing frequency to decease. Recommended Evaluation Tool BOOSTXL-PGA460 BOOSTXL-TUSS4470 EVM430-FR6047 BOOSTXL-TUSS4470 BOOSTXL-TUSS4470 BOOSTXL-TUSS4440 BOOSTXL-TUSS4470 Notes Enable near 0mm detection by using a bi-static transducer pair for a separate transducer to generate the echo, and another transducer to capture the round-trip time-of-flight. For top-down level sensing, use lower frequency transducers. For bottom-up level sensing, use higher frequency transducers.company no longer recommends using the TDC1000 for flow rate application due to known stability and accuracy issues of the device’s STOP pulse generation. Enable one-way measurements by using a bi-static transducer pair facing each other for a separate transducer to generate the echo, and another transducer to capture the one-way time-of-flight As transducers are added to the receiver array, the accuracy and addition details of the object to be tracked or mapped are increased. It is important to use a contact transducer acoustic matched to the solid you are measuring the thickness of. Improper transducer face type or poor mounting will result in invalid results. Monitoring the Doppler shift of the return echo is one method of seeking changes to the environment. Capturing the echo envelope over time per time-of-flight measurement is another way to monitor environmental changes by comparing the latest record cycle to the previous record cycle.company Ultrasonic Sensing IC Device Comparison: TUSS4470 TUSS4440 PGA460 MSP430FR6047 TDC1011 / TDC1000 Device type Analog front-end Analog front-end Analog front-end + digital signal processor (integrated) Analog front-end + digital signal processor (integrated) Analog front-end Supported transducer frequencies 40 kHz – 1 MHz 40 – 440 kHz (pre-drive) 40 – 500 kHz 30 – 80 kHz & 180 – 480 kHz 50 kHz – 2.5 MHz 31.25 kHz – 4 MHz Channel count 1 Channel 1 Channel 1 Channel 2 Channel TDC1011: 1 Channel TDC1000: 2 Channel Drive topology - Direct drive (max 36 V) - Pre-drive Transformer drive - Transformer drive - Direct drive with added FETs Direct drive (max 3.3V) Direct drive (max 5V) Gain stage 86 dB logarithmic amplifier 86 dB logarithmic amplifier 6 point time-varying gain (32 to 90 dB) Fixed gain (6.5 to 30.8 dB) Fixed gain (20 to 41 dB) Outputs - Analog echo envelope - Zero crossing - Envelope threshold detect - Analog echo envelope - Zero crossing - Envelope threshold detect - DSP processed output (time-of-flight, amplitude, width) - Echo data dump (down-sampled echo envelope) - Raw digital data path (ADC, bandpass filter, rectifier, lowpass filter) - Flow rate - DSP processed output (time-of-flight) - Zero crossing - Echo start and stop pulse Temperature sensor No No On-chip temperature sensor On-chip temperature sensor Interface to RTD Diagnostics SPI diagnostics SPI diagnostics - System diagnostics (frequency, decay, excitation voltage) - Supply diagnostics (overvoltage) Programmable None Automotive qualified device N/A N/A PGA460-Q1 N/A TDC1011-Q1 TDC1000-Q1 Output interface - SPI for programming - Analog output - SPI for programming - Analog output - USART (UART + SPI) - OWU - TCI - UART - I2C - SPI SPI The following collateral will be available on E2E until officially released to the product page: TUSS44x0 E2E Content: BOOST-TUSS44x0 EVM-GUI Overview and Quick Start Video: Ultrasonic FAQ Archives: PGA460: /support/sensors/f/1023/t/640810 TDC1000: /support/sensors/f/1023/t/724028 TDC1000 no longer recommended for accurate flow metering. Please consider using the TUSS4470 as an alternative to the TDC1000 for all ultrasonic applications. + +If you have any questions regarding this post or its linked content, start a new E2E discussion or thread. + diff --git a/data/text/DLP2/753020 b/data/text/DLP2/753020 new file mode 100644 index 0000000000000000000000000000000000000000..5f15c13ed9d1eebe843f62ecfa58c5179680f104 --- /dev/null +++ b/data/text/DLP2/753020 @@ -0,0 +1,6 @@ +[FAQ] BQ24040 and BQ2404X family Charge Complete Pin Behavior, /CHG + +The BQ2404X family of charger has a charge complete pin, /CHG to indicate charge in progress or complete. But under some conditions the battery charge has stopped (no current to battery) but /CHG indicates charge. In other case the battery is charging (current to battery) but /CHG does not indicate charge in progress. + +This also applies to BQ21040, BQ24050, BQ24090 and BQ25100 family of devices. The /CHRG pin in an open drain output used to indicate that a battery charge cycle is in progress. The pin will go low when the device detects a valid power supply and starts charging the battery. The pin will go high impedance when the device detects that the battery is fully charged (Change Complete/ Termination). In order to optimize end user experience the charger behavior under the particular cases below is as follows: 1.) If TS (NTC) pin indicates an over temp condition charge is suspended, but the /CHG pin will remain low since termination or charge complete has not been detected. Charge will resume when temp is reduced and the /CHG pin will remain low. 2.) The BQ2404X will automatically restart charge if after termination/charge complete the battery voltage drops to Recharge (V-RCH). This is done to maintain the battery fully charged. In this case the /CHG pin will remain high-Z after termination even if the recharge has started. 3.) During OVP shutdown or Charge Timer Fault /CHG is high –Z Note on First Charge Cycle-- will start when power is applied, disable / enable using TS pin or detect battery insertion, /CHG is low. Start charge cycle but not First charge cycle exiting TTDM mode or battery voltage below V-RCH. Additional info see BQ24040 Data Sheet Charge Complete Data Sheet section 8.3.7 also see Table in section 8.4.1. Note -- Updated section 2 May 20, 2019 -- To remain high-Z + diff --git a/data/text/DLP2/762756 b/data/text/DLP2/762756 new file mode 100644 index 0000000000000000000000000000000000000000..028bcf30d5caea69ec303e9c06602e337e978c35 --- /dev/null +++ b/data/text/DLP2/762756 @@ -0,0 +1,6 @@ +[FAQ] BQ24040 and BQ2404X family TS pin configuration of NTC and TTDM mode + +The TS pin has multiple ways that it can be configured. What is the best way to connect it and how? + +Hello This also applies to BQ21040, BQ24050 and BQ24090 family of devices. The TS pin options and configurations, the best arrangement will depend on the system requirements. Below is a summary of the modes and configurations. Normal battery Charge -- Connected to NTC thermistor in battery pack to monitor battery temp. 50uA current source will develop a voltage that is monitored by internal voltage comparators. Charge is suspended above 1230mV and below 178mV. If NTC is not used a 10k resistor will enable normal operation. Shutdown – Pull TS pin low to will disable charge. Termination and Timer Disable Mode (TTDM) – Float or drive high to enter TTDM. This mode is similar to a power supply mode. After charge is complete the voltage will remain applied to battery. TTDM Disable – Connect a 237k resistor to ground to disable the TTDM mode. Intended for battery pack removed and TTDM mode in not needed. In this condition charge is suspended and no voltage present. The typical configuration is to connect an NTC / 10k resistor to TS. If the battery pack is removable then TTDM mode to power the device is an option. For additional information see section 8.4.8 and 8.4.9 in data sheet. + diff --git a/data/text/DLP2/763227 b/data/text/DLP2/763227 new file mode 100644 index 0000000000000000000000000000000000000000..ec2d656212dcdd0ebc6ff020f59a586594918267 --- /dev/null +++ b/data/text/DLP2/763227 @@ -0,0 +1,6 @@ +[FAQ] BQ24040 and BQ2404X family Trouble Shooting Tips, No Output, Charge Current Low, Early Termination and Others. + +What are some trouble shooting recommendation if we are seeing problems with the BQ24040 or similar devices. + +This also applies to BQ21040, BQ24050 and BQ24090 family of devices. Some Trouble Shooting tip for the device family If the device does not start charge, no current to battery check: TS pin voltage needs to be between 278mV and 790mV for normal operation Check that input voltage is below OVP, 6.6V. Double check ISET and PRETERM resistors, low charge current could cause problems. Charge will start but current to battery is low of target: TS pin voltage needs to be in the normal range. At low temp half charge will reduce current TS between 790mV and 1230mV ISET2 pin, Float will limit current to 100mA Input voltage low, need 700mV to 1000mV drop across the device for full output current. Internal thermal limit, if the die temp reaches 125C output current is reduced to control thermal rise. The Charge May Terminate Early or at lower voltage: TS pin voltage needs to be in normal range. At hot temp charge voltage is reduce to 4.06V TS between 278mV and 178mV. Resistance between the battery and charger will increase voltage at BAT terminal and appear as higher battery voltage. Also: Battery or battery simulator required for test standard load will not work. CHG and PG pin will give some insight into condition of device. Check the voltage at ISET, it should be proportional to output current reduced by 400. Iout/400 * R-ISET. Voltage at ISET represents output current and voltage at PRETERM represents termination point. Battery voltage for normal charge current needs to be between 2.5V and 4.1V. Below or above and current is reduced. + diff --git a/data/text/DLP2/787791 b/data/text/DLP2/787791 new file mode 100644 index 0000000000000000000000000000000000000000..14d5c06b465e288242262b064cd86ac736561d67 --- /dev/null +++ b/data/text/DLP2/787791 @@ -0,0 +1,6 @@ +[FAQ] BQ24040: BQ2404X Family Devices Schematic and Layout Review + +Part Number: BQ24040 Hello Team I have completed my design and layout can someone review it for me? + +BQ24040 and BQ2404X family Checklist for Schematic and Layout Review. This also applies to BQ21040, BQ24050 and BQ24090 family of devices. Below items are good points to check during schematic and layout review for device. Note that some points may not apply to your specific device. Schematic / Layout: Pin 1 – IN, input filter capacitor 1uF to 10uF range required. Locate close to the device. Should be ceramic (MLCC) with good high frequency response. Voltage on the input may have a wide range size to match possible voltage range. Pin 2 – ISET, Resistor to ground to set output current should be located near the device with good return back to thermal pad. Pin 3 – VSS, Ground to thermal pad Pin 4 – PRETERM, Resistor to ground to set pre-charge and termination current should be located near the device with good return back to thermal pad. Pin 5 -- /PG, Open collector output pull up required. OK to float if not used. Pin 6 – NC (No Connect) – Open Pin 7 – ISET2, USB100/500 select pin pull high, low or float. Pin 8 -- /CHG, Open collector output pull up required. OK to float if not used. Pin 9 – TS, Connect to NTC resistor in battery pack or on board to limit temperature range of charge. Ground with 10k if not used. Note if used with removable battery pack protection from ESD or additional filtering is recommended. Pin 10 -- OUT, output filter capacitor 1uF to 10uF range required. Locate close to the device. Should be ceramic (MLCC) with good high frequency response. Voltage will be regulated to 4.2V lower voltage rating than input can be used. Thermal Pad – Linear regulators can have high power dissipation. Connect to thermal plane with mult vias. Power dissipation on ISET and PRETERM resistor is very low and can be small package. Also see layout section of Data Sheet, section 11. + diff --git a/data/text/DLP2/815766 b/data/text/DLP2/815766 new file mode 100644 index 0000000000000000000000000000000000000000..9f89ff2a73359b6f1aab2d8fa656f87f4691279a --- /dev/null +++ b/data/text/DLP2/815766 @@ -0,0 +1,6 @@ +[FAQ] OPT3101: What are the resourcescompany provides for developing with OPT3101? + +Part Number: OPT3101 + +Getting started Training videos: /zero-hero-time-flight-training-series Device datasheet: /lit/ds/symlink/opt3101.pdf Evaluation OPT3101EVM is available here: /tool/OPT3101EVM Device is pre-calibrated and ready for use. EVM demonstrates using OPT3101 for long range single channel ToF distance measurements. TIDA010021 is a reference design demonstrating OPT3101 used for wide field-of-view with multiple zones of detection. It is available here: /tool/TIDA-010021 System level design (component selection and board design) System design involves optical component selection and board design and layout. The system design guide provides all the necessary theory and instructions for this process. The estimator tool helps with selecting optical emitters and photodiodes and estimating performance, range, and accuracy for these components. system design guide: /lit/ug/sbau305b/sbau305b.pdf system estimator tool: /tool/OPT3101ESTIMATOR-SW Calibration Tools The SDK tool provides all C++ functions needed for calibration. This can be integrated to an existing system or run on any host with C++ compiler (microprocessor, linux PC, windows, etc.). It can also be used in calibration tool mode on acompany MSP430 launchpad to speed calibration process which requires no coding and simply commenting a line of code per calibration step and compiling the code in Code Composer Studio. Details of this method are run through step-by-step in the SDK user guide document included in the SDK. SDK: /tool/OPT3101-SDK The configurator tool is a graphical interface for selecting the OPT3101 settings to use for the design. It generates an SDK configuration file with register settings that can be imported to the SDK and eliminates the need to select individual register settings. Configurator tool: /tool/OPT3101CONFIG-SW Documents How to calibrate doc: /lit/pdf/slau791 Register level calibration doc: /lit/pdf/sbau310 App notes We have a number of app notes that give more details on a variety of topics. These are available here: /product/OPT3101/technicaldocuments#doctype1 Overview of collateral /product/OPT3101#design-resources-for-you + diff --git a/data/text/DLP2/816332 b/data/text/DLP2/816332 new file mode 100644 index 0000000000000000000000000000000000000000..ea93c088bed8d83c0fb1881f9aa87122fe33127e --- /dev/null +++ b/data/text/DLP2/816332 @@ -0,0 +1,8 @@ +[FAQ] IWR6843 Antenna-on-Package (AoP) Frequently Asked Questions + +Hello Everyone, Please see the below Frequently Asked Questions on the IWR6843 AoP Device and IWR6843AOPEVM. Cheers, Akash + +Thanks for the information. -Nitin + +Frequently Asked Questions on the IWR6843AoPEVM: Antenna Questions: Q: How deep in the chip is the antenna located (in order to find proper distance for cover placement)? Is there any material interface (through which waves are passing) on the top of the chip that should be taken in account? A: Antenna is located on the Top side of the Package itself. There is no material interface, Antennas are located on the top surface of the package. Hence for the distance measurement you could consider top side of the package. Q: Is it possible to place cover directly in contact with the chip front? Or should there be at least half wavelength gap? A: It's recommended to keep at-least multiple of half wavelength distance. Please refer to this app-note section 5. Q: How does Angular Resolution compare from AoP to ISK antenna? A: IWR6843AOP has different antenna configuration, hence it has equal angular resolution both in Azimuth and Elevation direction. Q: What is the antenna pattern for IWR6843AoPEVM? A: Rx Pattern: Tx Pattern: Q: What is the arrangement of Transmitters and Receivers on IWR6843AOPEVM? Below diagram has the antenna placement and positions of virtual Antenna pairs. Schematics: Q: Are schematics of the IWR6843AOPEVM available? A: Yes they are! You can find schematic, assembly, and BOM on the IWR6843AOP Landing Page under the Design Files Section. Visualizer Error: Q: When I am trying to connect send config to mmWave device, then it is showing an error "Selected Platform [xWR68xx_AOP] not matching that reported by target [xWR68xx]". A: This error occurs when the AoP EVM has been flashed with binaries from the Non-AoP SDK. You should instead flash the EVM with 64xx_AoP binary from the appropriate AoP SDK. EVM Questions: Q: Do I need to purchase an MMWAVEICBOOST Carrier card with my AoP EVM? A: The MMWAVEICBOOST is highly recommend for development and debug purposes. The board provides debug, raw data capture connectivity, SPI and interface to the antenna board peripherals etc. whereas in standalone mode you have access to UART, you can flash the EVM and get data out of the UART port. Q: Is Heat Sink necessary for IWR6843AoPEVM? A: Heat sink is not a mandatory requirement for the EVM. However, EVM comes with the example heat sink option for the EVM, Heat sink helps in reducing the junction temperature. Below curve shows duty-cycle vs temperature in deg centigrade. There are four curves two of them shows temperature difference with and without heat sink options. Other two curves are best fit linear trend lines for the with and without heat sink options. Below graph is specific example of heat sink and customers could choose to design their own heat sink depending upon their application needs. Also customers could choose to operate different duty-cycle options depending upon the application requirements.care need to be taken not to exceed the junction temperature beyond 105 deg C. Q: What other boards do I need to use IWR6843AoPEVM AoPEVM could be used standalone configuration, in this case one could flash the EVM and run demo applications. Extended section of the EVM allows connectivity to other chipsets such as Bluetooth, 9-Axis sensor, LCD interfaces. Note that some of these components are not pre-mounted along with the EVM, customer need to mount these components. 60Pin connector on the back side of the board allows connectivity to MMWAVEICBOOST from which customers could connect to XDS110 interface/14 pin/60 pin MIPI connector for JTAG and other advanced debugging options. With the help of Carrier board (MMWAVEICBOOST, DCA1000 and IWR6843AoPEVM) raw ADC data could be captured using mmWave studio application. For more details please refer to EVM user-guide. Q: How can I use the break out board part of the IWR6843AoPEVM and implications? EVM is designed for form-factor usage, Customers could choose to breakout section to separate the EVMs into two pieces. Once EVMs are separated it cannot be joined together. After the break-away EVM module would be 23 x 22 mm size. This section offers one USB connector and slide switch for flashing mode and default functional mode options. Care need to be taken on the thermal heat dissipation, at higher duty-cycle heat sink option need to be considered so that junction temperature should not exeeded 105 deg C. Q: What Demos are available for IWR6843AoPEVM ? The following demos are available for IWR6843AOPEVM MMWAVE SDK Demo - 68xx AOP 68xx - Area Scanner ROS Point Cloud Visualizer Autonomous Robotics with ROS for mmWave Multiple Gesture and Motion Detection Lab - 68xx Q: Can I run IWR6843ISK code on IWR6843AoPEVM ? How? Compared to the IWR6843ISK, the IWR6843AOPEVM has a different antenna design and this requires modifications to the angle of arrival computation corresponding to the IWR6843AOPEVM virtual antenna array. To develop basic understanding of virtual antenna arrays and angle of arrival estimation concepts, refer to the following resources mmWave Training Series training video: Intro to mmWave Sensing – Angle Estimation MIMO Radar app note The IWR6843AOPEVM is supported by mmWave SDK 3.2.0.x_AOP which provides the 2D AoA DPU (Data Processing Unit) for angle of arrival estimation on the AOP device. This AoA technique is not supported in mmWave SDK 3.2.0.x for IWR6843ISK so the user will need to modify/replace the angle of arrival code in the ISK based application according to the AoA technique demonstrated in the 2D AoA DPU used in the IWR6843AOP out of box demo. Please refer to the following documentation resources included in mmWave SDK 3.2.0.x_AOP to understand the IWR6843AOP out of box demo and the 2D AoA technique. MMWAVE-SDK 3.2.0.6 Module Documentation. AOP Out of box demo: xwr64xx mmw Demo (for IWR6xxx ISK and AOP platforms) 2D AoA DPU: AoA (angle of arrival) using 2D FFT method + diff --git a/data/text/DLP2/837889 b/data/text/DLP2/837889 new file mode 100644 index 0000000000000000000000000000000000000000..188dce287f65ccde38dfd46180990120e6f11e0a --- /dev/null +++ b/data/text/DLP2/837889 @@ -0,0 +1,8 @@ +[FAQ] CCS/LP5036: How to master LP50xx device within five minutes? Please provide the quick start guide of LP5009, LP5012, LP5018, LP5024, LP5030, LP5036 device. + +Part Number: LP5036 Tool/software: Code Composer Studio Q1: What’s the right direction when USB2ANY module is connected to the LP50xx EVM? Q2: What is the purpose of color mixing? Is it similar with brightness control? Why there is no individual brightness control for each output channel? Q3: How to achieve a user-defined dynamic lighting pattern with LP50xx device? Q4: How to control the color temperature of RGB- LEDs using LP50xx device? Q5: How to estimate the junction temperatures of LP50xx device? + +Q1: What’s the right direction when USB2ANY module is connected to the LP50xx EVM? Fig.1 shows the right direction when the USB2ANY module is connected to the LP50xx EVM. Please pay attention to the part marked in the blue block. For more details concerning hardware setup of LP50xx EVM, please refer to the corresponding user’s guide. I provide a link here to download the user’s guide of LP5024. Fig.1 Q2: What is the purpose of color mixing? Is it similar with brightness control? Why there is no individual brightness control for each output channel? Color-mixing means that different color can be decomposed of different proportions of RGB. You can configure the proportions of RGB to get desired colors. The proportions of RGB are controlled by configuring the brightness of each R,G and B LEDs. The PWM duty ratio control is related to the brightness of each channel. As shown in Fig.2, PWM duty cycle is defined as the product obtained by multiplying the color-mixing register value (Outx_color) by the related intensity-control register value (LEDx_Brightness). Actually brightness of each output channel can be controlled by the register OUTx_Color individually. However, the value of OUTx_Color will affect the proportions of RGB. When color is fixed, the independent intensity control (LEDx_Brightness) is used to achieve accurate and flexible dimming control for every RGB LED module. Besides, OUTx_Color register can be used to adjust the brightness independently for single color LEDs. Fig.2 Q3: How to make a user-defined dynamic lighting pattern with LP50xx device? Can you provide the sample code and Linux driver? Actually, you have two choices to achieve user-defined dynamic lighting pattern with LP50xx device. Choice A: You can use micro controller, such as MCU or DSP, to control the LP50XX to achieve a user-defined dynamic lighting pattern. I provide the links here to download the sample code and Linux driver. Choice B: You can initialize, set up and play with the LEDs from a C program through USB2ANY SDK. For more details concerning USB2ANY SDK, such as code example, please refer to this thread. + +Q4: How to control the color temperature of RGB- LEDs using LP50xx device? Fig.3 Let (xi, yi, i=R, G, B) denote the CIE 1931 chromaticity coordinates and (Φi, i=R, G, B) denote the luminous flux of the light emitted by the ith LEDs. (x, y) represents the color coordinates of light synthesized by RGB-LEDs. CCT means correlated color temperature. Since variations of the (xi, yi, i=R, G, B) are relatively small, the CCT synthesized by RGB-LEDs can be expressed as a function of the flux ratios Φi/ ΦB. Hence, you can control the color temperature by adjusting the proportions of RGB by OUTx_color according to the formulas shown in Fig.3. Q5: How to estimate the junction temperatures of LP50xx device? Since there is only a very small percentage of heat energy in a typical plastic package is convected and radiated off the top surface of the package. Hence, if one assumes the entire power is dissipated by the top surface, the junction temperature calculated by RθJC is higher than reality. This limitation of RθJC is overcome by the new thermal metric, ΨJT. ΨJT is recommended to estimate the junction temperatures. For calculation of Pd (power dissipation), please refer to the training video here. For more details about ΨJT, You can refer to the application report of "Semiconductor and IC Package Thermal Metrics". + diff --git a/data/text/DLP2/871078 b/data/text/DLP2/871078 new file mode 100644 index 0000000000000000000000000000000000000000..eadc344d83d99d4fe57d4bc17d11c1c386fe2207 --- /dev/null +++ b/data/text/DLP2/871078 @@ -0,0 +1,6 @@ +[FAQ] BQ25710, BQ25713, BQ25713B, BQ25700A, BQ25703A, BQ25708 - Schematic Review Design Tips + +The following document shows key considerations when choosing external components for your BQ25710, BQ25713, BQ25713B, BQ25700A, BQ25703A, BQ25708 design, as well as the tradeoffs. The BQ257xx family of devices are 1-4 cell buck-boost charge controllers that require a host via SMBus or I2C to operate. The attached document is a checklist for reviewing the design of this particular family of devices. It details the external component selection and pin connections, as well as minimum requirements for proper operation of the charger. Components are numbered to match the BQ25710EVM and BQ25713EVM reference design schematic component designators. The component selection is details in the following four categories: Required - Absolutely required for proper operation Recommended - Recommended to optimize performance Recommended-DNP - Recommend as a non-populated component footprints to improve performance post-fabrication Optional - Optional componetns Using this information, customer can reduce external components based on their application, as well as use this document to help in assisting with schematic reviews. Regards, Joel H + +6712.BQ2571X_SchematicChecklist_CalculationTool.pdf + diff --git a/data/text/DLP2/872937 b/data/text/DLP2/872937 new file mode 100644 index 0000000000000000000000000000000000000000..75fc9c9c0c0fd1ddbd885c4445a99cf6e53b7ec3 --- /dev/null +++ b/data/text/DLP2/872937 @@ -0,0 +1,6 @@ +[FAQ] TPS23882: Is the TPS23882 Type-3 2-pair IEEE 802.3bt (30W/15.4W) compliant? Where can I find TPS23882 passing Sifos conformance test reports to be certain? + +Part Number: TPS23882 Is the TPS23882 Type-3 2-pair IEEE 802.3bt (30W/15.4W) compliant? Where can I find TPS23882 passing Sifos conformance test reports to be certain? + +The TPS23882 is Type-3 2-pair IEEE 802.3bt (30W/15.4W) compliant and has received an interoperability score of 100% on Sifos IEEE 802.3bt 2-pair conformance test suite version 5.1.company has passing Sifos test reports for the TPS23882 under various configurations. The configuration of the TPS23882 when these reports were generated is shown in the table below: Report Name 2-Pair Allocated Power Device Mode of Operation Memory Utilization: ROM or SRAM Version Hardware Required GUI Used for Configuration PSA_report_T3_15W_x82_P5_AUTO.xlsm 15.4W Autonomous ROM TPS23882EVM-008 + BOOST-PSEMTHR8-097 N/A – Autonomous operation resistor for 15.4W ( = 124 kΩ) utilized. PSA_report_T3_30W_x82_P5_AUTO.xlsm 30W Autonomous ROM TPS23882EVM-008 + BOOST-PSEMTHR8-097 N/A - Autonomous operation resistor for 30W ( = 62 kΩ) utilized. PSA_report_T3_15W_x82_P5_ROM.xlsm 15.4W Auto ROM TPS23882EVM-008 + BOOST-PSEMTHR8-097 TPS2388x EVM GUI PSA_report_T3_30W_x82_P5_ROM.xlsm 30W Auto ROM TPS23882EVM-008 + BOOST-PSEMTHR8-097 TPS2388x EVM GUI PSA_report_T3_15W_x82_P5_FWv0x03.xlsm 15.4W Auto SRAM version 0x03 TPS23882EVM-008 + BOOST-PSEMTHR8-097 TPS2388x EVM GUI PSA_report_T3_30W_x82_P5_FWv0x03.xlsm 30W Auto SRAM version 0x03 TPS23882EVM-008 + BOOST-PSEMTHR8-097 TPS2388x EVM GUI PSA_report_T3_15W_P1_x82_FirmPSE_v00.01.33.00.xlsm 15.4W Semi-Auto SRAM version 0x03 FIRMPSEEVM2P-BDL (TPS23882EVM-084 + PSEMCUDAUEVM-082 + PSEMTHR24EVM-081 bundle) TI’s FirmPSE PSE system firmware version 00.01.33.00 PSA_report_T3_30W_P1_x82_FirmPSE_v00.01.33.00.xlsm 30W Semi-Auto SRAM version 0x03 FIRMPSEEVM2P-BDL (TPS23882EVM-084 + PSEMCUDAUEVM-082 + PSEMTHR24EVM-081 bundle) TI’s FirmPSE PSE system firmware version 00.01.33.00 The above mentioned reports can be found in the following zip file for reference: 1212.TPS23882 Sifos Test Reports.zip IEEE 802.3bt Interoperability Note IEEE 802.3bt compliant devices are backwards compatible with IEEE 802.3at and IEEE 802.3af compliant devices. For example, an IEEE 802.3at compliant PD and/or IEEE 802.3af compliant PD will interoperate with an IEEE 802.3bt compliant PSE.company believes it is advantageous to design with IEEE 802.3bt compliant devices moving forward for 4-Pair and 2-Pair operation due to the benefits that the .bt standard offers over previous standards such as the new MPS signature, autoclass, power demotion, and more. Additional Resources Get started on your 2-Pair Ethernet Switch design with TI’s 24-Port (2-pair) power sourcing equipment reference design for multi-port applications and FirmPSE PSE system firmware. For 4-pair Ethernet Switch designs, consider TI’s 24-Port (4-pair) power sourcing equipment reference design for multi-port applications and FirmPSE PSE system firmware. Check out TI’s PoE Training Portal to learn about PoE fundamentals and the new .bt standard. Watch the training video IEEE 802.3btcompany PSE New Features to learn about PSE features introduced in the .bt standard. + diff --git a/data/text/DLP2/879951 b/data/text/DLP2/879951 new file mode 100644 index 0000000000000000000000000000000000000000..a303720616cf4ec5d2f619fed5946df0d42b5969 --- /dev/null +++ b/data/text/DLP2/879951 @@ -0,0 +1,24 @@ +PTD08D210W: UCD9248 controled by PTD08D210 problem + +Part Number: PTD08D210W Hi, I found that PTD08D210 is generating a voltage of 5.9V even when the UCD9248 is not configured. PTD08D210 has two power output and this problem is seen only in one channel, I even erased the UCD Flasmemory and confirmed that no PWM is going to PTD08D210 but still i see 5.9V in one of the channel. Note: My evel board has 4 PTD08D210 which means 8 o/p voltage channels and 2 UCD9248 to control it , out of which in only one channel i have this problem. Is it the problem with the PTD08D210 , it was working fine only suddenly in one day this problem happened. + +Hi Revanth, If comfortable, can you provide more information about your application? Application conditions: Input and Output voltage, output current? (the device is rated to provide an output range from 0.7 V to 3.6 V) Perhaps we can take a look at your circuit schematic? Thanks, Alejandro + +Hi, Alejandro Kindly look into thje attached pdf zc702_Schematic_xtp185_rev1_0.pdfPage 43, U19 The output is rated at 1.5V and 3.3V for this particular PTD in which the 1.5V channel is having the problem + +Hi Revanth, I reviewed your schematic and everything seems okay. You mentioned that it was working before and eventually something happened; Can you tell me more details about that? Did it involve updating anything on the UCD? Regards, Alejandro + +Hi, Alejandro One sudden day we noticed our DDR Not working, then when we checked the voltage going to DDR section from PTD it was 2.5 V instead of 1.5 V, then when we isolated the DDR , WE found that the voltage from PTD IS 5.6 V half of the input voltage to PTD AND UCD., We earsed the UCD Flash memory to and even when no PWM IS going to PTD it generates 5.9 V. I just thinking to change the PTD and see. + +Hi Revanth, Is there an update on this? If you were to swap out the PTD08D210 for a new one, does the problem still occur? How many of these failures have you seen occur in your application? Regards, Jimmy + +Hi, Jimmy Just now received the components and will update the status once the rework has been done. In our application we have faced these issue two times (at rail 1.5V and at Rail 3.3V). + +Hi Revanth, Please keep Alejandro and I updated on your additional testing at your earliest convenience. Regards, Jimmy + +Hi Revanth, Do you have any updates for both Alejandro and I? Regards, Jimmy + +Hi, Jimmy we tried replacing the IC which was available in the PTD , instead of replacing the whole PTD but it dint workout, now we have sent our board to remove the whole PTD (Since the ground thermal pads are thick it difficult to remove easily). but now due the situation due to COVID-19 , most of the companies are shutdown now and it will take some time to receive our board. I will let yu know once we receive and test it. Thanks! + +Hi Revanth, Sorry I missed your reply and thank you for the update. It is unfortunate that we are in the COVID-19 predicament and I hope all is well on your end. I will keep this thread up on place it under "Waiting for Customer" status and will ping me when you reply back with more information on this. Regards, Jimmy + diff --git a/data/text/DLP2/881174 b/data/text/DLP2/881174 new file mode 100644 index 0000000000000000000000000000000000000000..a824f695fb9930a119e8b8fbe2507d5a9124bf3c --- /dev/null +++ b/data/text/DLP2/881174 @@ -0,0 +1,24 @@ +BQ30Z554-R1: bq30z55DBTRRR3 DFW issue + +Part Number: BQ30Z554-R1 Hi Team, i have a problem,cusotmer use BQ30Z55DBTR-R3 for battery pack solution has been M/P,but DFW issue occur random. was started by DFW, we have reset IC to clear the PF flag but DFW still happen, how can i avoid this problem? or have any idea and suggestion for us. attachment is schematic. JM2SP068PPV600A_schematic (003).pdf + +Hello Tommy, Sorry, can you clarify, what is DFW? + +Hi Kang Kang, FYI. + +Hi Kang Kang, have any idea or suggestion? + +Hello Tommy, Can you check the cycle count and attach the gg file? The DF flash write not successful may mean that the flash is worn out. If this is the case, we should see a high cycle count number in the gg file. + +Hi Kang Kang, but will this this complete charge and discharge increase once? does this have anything to do with the number of write? because we have confirmed that the cycle count of the PACK returned by DFW is more 100 and more than 200,but there are also less than 100, so i don't see this kind of problem appear in the datasheet after using DF flash write many times, so could you help confirm this issue?or is there any way to avoid this kind of problem. + +Hello Tommy, This most likely means a dataflash is worn out. I am just wondering how many times this has been out in the field. I'll check the conditions for this bit setting. + +Hello Tommy, During firmware operation, the gauge will try to update Ra tables or Qmax or lifetimes or some other impedance tracking parameter. The bit is set because when the gauge writes to flash, it will try to read back what it wrote. In this case, if the read back is different, the DFW bit is set. The most likely reason would be dataflash is worn out. Can you provide more information on how many packs are experiencing this failure? It could be that some of these packs may have been subject to multiple host side writes and caused the flash to wear out and gauge to unable to write to flash. Who is the end customer? + +Hi Kang Kang, Can you provide more information on how many packs are experiencing this failure? ans:11/55000 failure rate 0.02%, end custimer is Pegatron. if have DFW problem issue, will it cause IC damage? ic function be normal? as attached is customer the gg file, please reference. JS4HS002P1542000101.txt + +Hello Tommy, This does look like a potential flash corruption. Are you able to still communicate with the "DFW bit set packs"? + +Hi Kang Kang, if DFW is turn off(n/a), what other offect will it have? + diff --git a/data/text/DLP2/882868 b/data/text/DLP2/882868 new file mode 100644 index 0000000000000000000000000000000000000000..9d9ad7a102c90997e172f2376f95dc35e2a5c265 --- /dev/null +++ b/data/text/DLP2/882868 @@ -0,0 +1,24 @@ +IWR6843ISK: Unable to connect to Demo Visualizer using IWR6843ISK + +Part Number: IWR6843ISK Hi there， I am unable to connect my IWR6843ISK to the demo visualizer.I am able to use uniflash to flash the pplcount lab xwr68x.bin file of iwr6843isk in the lab, and then use the pplcount gui.exe program to get the point cloud map.During the setup of the IWR6843ISK i have correctly using the correct serial port. But whenever i press "send config to the mmwave device" it will show that com port 50 and com port 51 is "waiting for data". I hope I can get help, thank you very much, looking forward to your reply. Thanks. + +Hi, You are using the wrong visualizer. Please read the manual. Regards, Justin + +Hi,Justin . I am able to use uniflash to flash the 3D_people_count_68xx_demo.bin file of iwr6843isk in the lab, and then run the mmWave_People_Counting_GUISetup.exe program.But when I successfully connected to the serial port and pressed "send configuration", nothing happened to 3d plot.Even as I walked around the sensor's detection area, he still had no data changes.I sincerely hope to get your advice and reply. Thank you very much. + +Hi,Justin . I am able to use uniflash to flash the 3D_people_count_68xx_demo.bin file of iwr6843isk in the lab, and then run the mmWave_People_Counting_GUISetup.exe program.But when I successfully connected to the serial port and pressed "send configuration", nothing happened to 3d plot.Even as I walked around the sensor's detection area, he still had no data changes.I sincerely hope to get your advice and reply. Thank you very much. thanks ! + +Hi, Your device is probably not responding to the configuration file. First, lets confirm that is true without the gui: Connect you device to an application like Tera Term (tera term works well on windows for this) Connect to the UART Com port, set baud rate to 115200 If you reset the device, you should see output similar to this: If you do get output, you can try sending the config to the device using tera term. Set the newline delay to be 100 msec Open another tera term terminal on the DATA Com port - if you see random data coming across, then the device is sending data LED on the device should blink if it is tracking someone. If you get to step 3 and do not see any message in tera term the device is not booting properly. It is usually one of these issues: Power Supply is not compatible (need 5V 3A) - values too high or too low can cause the board to function improperly Device is not set to functional mode (make sure to remove SOP2 and hit the reset button) Device is ES1 - see the user's guide to determine revision Let me know if you need more help. Regards, Justin + +Hi,Justin . First, I determined that my power supply was 5V 3A and my device was ES2. 1. I used uniflash to put 3d_people_count_68xx_demo.bin file flash into iwr6843isk evm, and removed the sop2 jumper and clicked reset button to enter function mode.Start the Tera Term program to connect to the UART COM port, set the baud rate to 115200, press the reset button of the device, and there is no response in the display window of Tera Term. 2. In order to eliminate the problem of the device itself, I burned down the previous pplcount_lab_xwr68xx.bin file and did the same operation as above, and found that the Tera Term display window responded. thanks! + +Hi, Justin. I really need your help. How do you configure a device to use tera or other serial port tool terms?Are there any relevant documents and codes for reference? I sincerely hope to get your advice and reply. Thank you very much. thanks. + +Hi, Tera term is really just a serial port utility - you can use it to send or receive data - its useful for debugging. You can configure the device with it if you want to, just paste the configuration file into it. Back to your problem - the prebuilt binary should work since the device is ES2 and has the correct power supply. I would recommend using Code Composer Studio to rebuild the binary incase there was some corruption during the install process of the toolbox. Regards, Justin + +Hi,Justin . I really need your help. I tried to rebuild the.bin file using Code Composer Studio 8.1.0 or reinstall the toolkit, but still could not get the image data correctly. This time I chose the configuration document, but every time I pressed the "send configuration" button, the visualizer failed to respond. thanks！ + +Hi,Justin . I really need your help. I want to use IWR6843ISK EVM flash tida-010022 pc_lab_xwr68xx.bin file and run it successfully on the device, hoping to solve the following two problems. 1. Which visualizer should I use to observe the trajectory and point cloud map of the human body? When I used mmwave_people_counting_guisetu.exe, the result was the same as before, even without the GUI. 2. Can use serial port tool to send commands, configure relevant parameters, start sensors and read data. Is there any relevant document for reference? I am currently using: IWR6843ISK (ES2.0) + MMWAVEICBOOST Code Composer Studio 8.1.0 mmwave_industrial_toolbox_4_1_0 mmwave_industrial_toolbox_4_2_0 mmwave_sdk_03_03_00_03 uniflash_5.2.0 mmWave_Demo_Visualizer 3.3.0 MATLAB Runtime 2017a(9.2) I sincerely hope to get your advice and reply. Thank you very much. thanks！ + +Hi, I can think of a few potential issues: The com ports you have entered may be flipped. The computer is blocking access to the com ports, so that the gui application cannot use them. This is common with unregistered software, and can usually be fixed by running as admin. The wrong configuration is being sent (I think you already confirmed you were using the correct configuration and setup) To use the TIDA-01022, please download an older version of the toolbox. Version 4.0.0 is best. You can select different version of the toolbox from thecompany Resource Explorer page. Once you have this, run lab "68xx_people_counting" - this is the same software used in TIDA-01022. This comes with a Matlab gui - see if this one works for you. Regards, Justin + diff --git a/data/text/DLP2/883046 b/data/text/DLP2/883046 new file mode 100644 index 0000000000000000000000000000000000000000..dcdecc6395d999597616144c4a9bc9e60f32ad98 --- /dev/null +++ b/data/text/DLP2/883046 @@ -0,0 +1,24 @@ +UCC28600: TINA example model setup, changing the transformer to a coupled inductor + +Part Number: UCC28600 Hi, I would like to design a multi-ouput flyback converter based on UCC28600 controller IC. I would also like to simulate the circuit, therefore I was trying to change the transformer to a coupled inductor (because later I will need more than one output) in the given TINA example model to see if it is even possible to simulate the same system but with a coupled inductor with the same properties used with the transformer. Unfortunately, if I use a coupled inductor, the simulation result is completely different than before. Is there any way to change the transformer to component with which I would be able to simulate successfully a multi-output flyback topology? Thank you in advance! Bálint + +I suggest you simulate just with single output. Then you use cross regulation to understand other output. It is mainly a transformer simulation which you need to build your own model. Basically just to find out the leakages and coupling factors + +Hey, First, I really appreciate your answer, thank you very much! I took your advice and I was trying to simulate the circuit only with one output. Right now, all of the component values have been calculated but the circuit either works in a really weird way, or I get the infamous convergence problem. For example, the weird thing is that voltage top of the current sense resistor has a waveform which is far from ideal, it doesn't have the ramp increase, instead the voltage changes instantly. If the current source is around 4 A, than the duty cycle of the OUT pin looks strange as well. It has a kind of a normal cycle, after that some really thin pulses and it keeps repeating. I attached the current version. Do you have an idea why is it working like this? Edit.: I left the given transformer model in the simulation, I just changed its values based on my calculations. mine.TSC + +It looks some setup not good. Can you start with the TINA design (attached here, "slum608.TSC") fromcompany web and change one thing at a time to see which change causing the convergence problem? I just ran "slum608.TSC" and it worked ok. slum608.TSC + +Hi, Since then I did what you suggested, and the main reason why the circuit was not working is the incorrect secondary diode I've chosen. My problem now is the following: The attached simulation works as expected until 1.4A of load. The problem is, if I go higher than this value, the controller is unable to hold the output voltage on the desired 12V, even though all the values (OVP, current sense etc) have been calculated for 197W output power with 85% efficiency, therefore if the output current would be around 16A, it still should be able to work. Now I'm a bit stucked. I think the chosen OVP resistor values and current sense protection (Rcs and Rpl) have been calculated correctly, I don't really see why the controller stops the operation. Unfortunately, I don't know TINA that well, but my first thought was maybe the diode on the output causes some problems, as the current one is able to handle 1A maximum forward current, but changing that value doesn't help. Maybe somehow the state machine starts to work incorrectly? May I ask your help in this regard? Thank you in advance!step_by_step.tsc + +Can you probe each node to see if any hint? Also, when 12V is not held, does it drop or shutdown? If it drops, which means some setup is likely saturated. If shutdown, it means some fault triggered. You need to check one at time. + +12V slowly drops, it is quite clear that the controller doesn't put energy from the primary side, so the capacitor on the secondary side just loses its charges and the voltage drops in the same ratio. This is how it looks the drop after the load reaches the problematic level. And there are weird spikes in the current signal after the 2ms mark if I zoom in. This happens at 2A of load. This thing goes even more weird, if I change the load to 16A. In that case the controller keeps the primary side transistor open, and although the voltage on the output drops, the waveforms look really strange after the load goes on. + +Can you compare your simulation circuit and the original? My review of your circuit looks you removed the feedback loop compensation components on TL431 so your circuit cannot make correct loop compensation. + +I added the loop compensation as you suggested by following the steps in the "Compensation Design With TL431 for UCC28600" (SLUA671) document. The circuit unfortunately still doesn't work as expected. I can go a bit higher with the current up to around 4A (you can see a picture about a simulation with 1.6A load below), but it is still far from the final 16A. A was also trying to add the Zener network later before Rled, but it didn't help either. Based on the transfer characteristics, the compensation network should do the work, I changed the crossover frequency to 3kHz of Vo/Vcomp, it also meets with all the stability conditions. The other really weird thing for me (although maybe I just misunderstood something) is the switching frequency. Shouldn't it work with at least 40kHz bursts? Right now, depending on the load, the switching frequency varies between ~3kHz - 7kHz. And the pictures: Unfortunately it is quite hard to figure out if it reaches 12V or not, because the simulation stops with convergence problem a lot of times. Sometimes pressing 'retry' works, but I don't know how accurate the result going to be after this error. Also if I don't change anything in the example simulation, but I change the simulation time to 30ms, it doesn't run. It quits with convergence error. So back to my circuit: It reaches the target output voltage @1.6A, but during the simulation I had to press 'retry' on the convergence error once. At 3.5A at the start it looks like the system operates in CCM, but the controller is a DCM one, so it shouldn't happen right? The Bode of Vo/Vcomp I also attached the updated simulation circuit. 5824.step_by_step.tsc + +How did you decide the loop compensation? How did you design your converter parameter values? + +For the loop compensation as I said I followed the method presented in SLUA671. The following MATLAB code shows my implementation s = tf('s'); Rd = 8; ESR = 50e-3; Rcs = 151e-3; Vtl431min = 2.5; Vdd = 5; Vcesat = 0.3; Vf = 0.7; Ibias = 1e-3; CTRmin = 0.4; Rpullup = 20e3; Rledmax = (Vout-Vf-Vtl431min)/(Vdd-Vcesat+Ibias*CTRmin*Rpullup)*CTRmin*Rpullup; R1 = 10e3; Vsample = 2.5; Rlower = R1*Vsample/(Vout-Vsample); Vin = 325; Voutmax = 13; Nps = 15.27; D = Nps*Voutmax/(Vin+Nps*Voutmax); H = Nps*D/(5*Rcs)*Rd*(ESR+1/(s*Co))/(Rd+ESR+1/(s*Co)); %transfer function of Vo/Vcomp bode(H); Gmid = 10^(12.65/20); %to have 3kHz as cross-over frequency Rled = 499; R2 = Gmid*R1*Rled/(Rpullup*CTRmin); [z,p,k] = zpkdata(H); p = cell2mat(p); fz = abs(p(2,1)); fp1 = 40e3; %suggested pole fp2 = fp1; C2 = 1/(2*pi*R2*fz); C1 = 1/(2*pi*R2*fp1); C3 = 1/(2*pi*Rpullup*fp2); Copto = 2e-9; F = (s*R2*C2+1)/(s*R1*C2*(s*R2*C1+1))*(1/(1+s*Rpullup*(C3*Copto/(C3+Copto))))*Rpullup/Rled*CTRmin; %transfer function of compensation network bode(F); bode(H*F); Are you curious about all the converter parameters (transformer parameters etc), or only the ones which needed for the controller (OVP, current sense, Css etc)? + diff --git a/data/text/DLP2/885747 b/data/text/DLP2/885747 new file mode 100644 index 0000000000000000000000000000000000000000..aa9dd6c530f8087a50528539663dd3e90dda8cd9 --- /dev/null +++ b/data/text/DLP2/885747 @@ -0,0 +1,22 @@ +The question of function(clusteringDBscan_findNeighbors2Fixed) parameters + +Hello,TI's engineers.I use ti's IWR1642BOOST and want to develop SRR radar, so i read the demo of short_range_radar(SRR).When i read the clusteringDBscanRun, and see the function of clusteringDBscan_findNeighbors2Fixed(this function is first time appear in clusteringDBscan.c file, line 124),one parameter is confused me. neighCount = clusteringDBscan_findNeighbors2Fixed( detObj2D, point, neighLast, numPoints, epsilon2fixed, epsilonfixed, weight, vFactorfixed,inst->scope, &newCount, inst->dBScanNeighbourLim); The third parameter of neighLast whether the correct?I think this parameter should be neighCurrent.I don't know whether my understanding is wrong, so askcompany engineers can you help me to answer? Can you give me some clusteringDBscan data to better learn. Thanks a lot!!! + +Hi, For this question we need to check with algorithm developer. We should be able to get a response by early next week thank you Cesar + +HI, neighCurrent is a pointer pointing to the beginning of the neighbor list for the current scan. And neightLast is a pointer pointing to the end of neighbor list for the current scan. So, neighCurrent is not moving and neightLast is kept moving. And the delta is used to calculate the length of the neighbors founded for the current scan. Hope it helps, Zigang + +Hi，ti’ engineer！the function of clusteringDBscan_findNeighbors2Fixed is appear twice，first is find original point’s neighbor, the second is find neighbor’ s neighbor.When we find the neighbor’s neighbor, According to code comments we should compared neighbor’s neighbor’s speed with original point’s speed.If less than vfactor, so we think they are the same class.However, in srr code,your code still use original point’s speed compared with its neighbor’s speed,this compared is finished in the first function of clusteringDBscan_findNeighbors2Fixed, According to your code, the neighbors' neighbors will must be in the same class，This should not be the intent of your code itself.Can you check the function of clusteringDBscanRun，I think there is a logical problem with this function？ + +Hi, I have talked with algorithm developer. We have reviewed the code but we did not see any bug. Could you please provide more information with the code lines you are analyzing? Please provide the code lines you have question about. This will help us understand if there is a bug thank you Cesar + +Hello,Cesar! I think my previous question was not clearly stated.and i think the function of clusteringDBscanRun has some problem not clusteringDBscan_findNeighbors2Fixed .In clusteringDBscanRun.c file and the 167~175 lines,you find the original obj's neibor,then you should find original obj's neibor's neibor.if find it,we should take the original obj's neibor's neibor's speed compare with the original obj's speed,but the demo code still use the obj's neibor's speed compare with the original obj's speed.So the neighbors' neighbors and original obj's will must be in the same class.Please check it again. the code is in clusteringDBscanRun.c file and the 167~175 lines: if(neighCount >= inst->minPointsInCluster) { int32_t speed = (int32_t) detObj2D[point].speed; /* Check if the new point's velocity is the same velocity as the * clusterOriginator. */ if (_abs(detObj2D[member].speed - speed) < vFactorfixed) { for (ind = 0; ind < newCount; ind ++) { member = neighLast[ind]; inst->scope[member] = POINT_VISITED; } neighLast += newCount; /* Member is a core point, and its neighborhood is added to the cluster */ } } Thanks a lot! + +HI, Within the while loop, we will find all the neighbor's neighbor, neighbor's neighbor's neighbor and etc. Every time, when the function clusteringDBscan_findNeighbors2Fixed is called inside the "while Loop", the neighLast will grow longer and the new neighbor's neighbor will become member to be checked. Therefore, the if condition you mentioned below if (_abs(detObj2D[member].speed - speed) < vFactorfixed) will check all the neighbor, neighbor's neighbor and neighbor's neighbor's neighbor with the clusterOriginator. Best, Zigang + +hi,Zigang! The demo code's purpose is compare neighbor's neighbor's speed with the clusterOriginator's speed,and if in the vFactorfixed then think it is in the same clusterId.And your code comment is also point that:"/* Check if the new point's velocity is the same velocity as the clusterOriginator. */" However, in code the member is still the clusterOriginator's neighbor's index, i think it should be clusterOriginator's neighbor's neighbor's index.So the clusterOriginator's neighbor's neighbor must be in the same clusterId,even thought Within the while loop we will find all the neighbor's neighbor, neighbor's neighbor's neighbor and etc as you said.Please check it again.Thanks! + +HI, In this following if condition: if (_abs(detObj2D[member].speed - speed) < vFactorfixed) speed is the speed of the clusterOriginator. detObj2D[member].speed is the speed of new points, including: the neighbor, neighbor's neighbor and neighbor's neighbor's neighbor and etc. Therefore, we are checking the new points's velocity with the velocity of the clusterOrginator. Please let me know where did I misunderstand. Best, Zigang + +Hello,zigang Yang! In function of clusteringDBscanRun,you call the function of clusteringDBscan_findNeighbors2Fixed twice.First time you want to find the clusterOrginator's neibor,and the second time you want to find clusterOrginator's neibor's neibor and clusterOrginator's neighbor's neighbor's neighbor and etc.And you will put the neibor in the inst->neighbors in turn.We look the code behind: while (neighCurrent != neighLast) // neigh shall be at least minPoints in front of neighborhood pointer { // Explore the neighborhood member = *neighCurrent++; // Take point from the neighborhood output->IndexArray[member] = clusterId; // All points from the neighborhood also belong to this cluster inst->visited[member] = POINT_VISITED; neighCount = clusteringDBscan_findNeighbors2Fixed( detObj2D, member, neighLast, numPoints, epsilon2fixed, epsilonfixed, weight, vFactorfixed, inst->scope, &newCount, inst->dBScanNeighbourLim); if(neighCount >= inst->minPointsInCluster) { int32_t speed = (int32_t) detObj2D[point].speed; /* Check if the new point's velocity is the same velocity as the * clusterOriginator. */ if (_abs(detObj2D[member].speed - speed) < vFactorfixed) { for (ind = 0; ind < newCount; ind ++) { member = neighLast[ind]; inst->scope[member] = POINT_VISITED; } neighLast += newCount; /* Member is a core point, and its neighborhood is added to the cluster */ } } } The member is clusterOrginator's neibor,and then you take it compare with the clusterOriginator's speed,this is compared in the first call the function of clusteringDBscan_findNeighbors2Fixed,so the condition: if (_abs(detObj2D[member].speed - speed) < vFactorfixed) will must established, and then you take the new points(clusterOrginator's neibor's neibor) add in the inst->neighbors. I think the member in if condition(if (_abs(detObj2D[member].speed - speed) < vFactorfixed)) should be the clusterOrginator's neibor's neibor, not the clusterOrginator's neibor. Please check it again. Thanks a lot! + diff --git a/data/text/DLP2/886080 b/data/text/DLP2/886080 new file mode 100644 index 0000000000000000000000000000000000000000..b691e8baf86b9414586b068dee78cf40b52bacc8 --- /dev/null +++ b/data/text/DLP2/886080 @@ -0,0 +1,22 @@ +BQ40Z80: 7th cell calibration problem. + +Part Number: BQ40Z80 Hi everyone. I have a problem with cell calibration by battery management studio 1.3.86. I set each of 7 cells to 4V on resistors voltage divider. I eter the values for calibration (see attached picture). But I always get 7th cell near 3940mV ad not near 4000mV. All other cells are near 4000mV. Only if I manually adjust VC7 Sense Gain I achieve desired 4000mV at 7th cell. Does anyone had the same problem with calibration by battery management studio 1.3.86.??? Is there any solution to this? I attache 2 gg files with manual and battery studio calibration. bq studio calibration.gg.csv manual calibration.gg.csv + +Hello Maxim I'm assigning this to device expert. Expecta response within 2 days. + +I forgot to mention when I adjust manually VC7 Sense Gain the BAT pin voltage get adjusted correspondingly but it still inside 1% battery voltage error range. I get the same phenomenon on my design and on evaluation board. + +The Cell 7 voltage is handled differently from the voltage of other cells. Let me try my EVM and see if there is a way to help you. + +Please try on the test version (1.3.100), I believe this issue should be resolved. Thanks! + +I have tried 1.3.100 version of bq Studio. The problem still exist. + +Hi Maxim, I guess what you try is to follow the steps in Section 2.2 of the following app note and see if you can have better calibration results. /lit/an/slua868/slua868.pdf Andy + +slua868.pdf describe how to calculate the calibration coefficients. I am doing it myself to correct wrong calibration by Battery Management Studio program. My problem is the wrong calibration by Battery Management Studio. + +I will report this issue to my software team so that they can double-check if it is necessary to update their existing code. Andy + +Do you get the same result in bqStudio if you uncheck "Calibrate Pack Voltage"? + diff --git a/data/text/DLP2/886270 b/data/text/DLP2/886270 new file mode 100644 index 0000000000000000000000000000000000000000..6b8d38441aa91def8b5121c7c6f12fec818440c7 --- /dev/null +++ b/data/text/DLP2/886270 @@ -0,0 +1,24 @@ +BQ35100: BQ35100 + +Part Number: BQ35100 Hi, There is a customed board with BQ35100 and MCU. I setup BQ35100 in EOS mode (reg. 0x41b1), and modified R Data Seconds (reg. 0x4255) setup 1 second. To get data (voltage, current, temperature) the following sequence is used: 1. Enable BQ; 2. Start BQ (send start command); 3. Read data(voltage or current or temperature); 4. Stop BQ (send stop command); 5. wait for timeout specified in R Data Seconds (expected 1 s) wait until G_DONE bit is set; 6. Disable BQ; The problem is that actually it takes about 4 min (instead of expected 1 s) to wait G_DONE is set. Do I need to send some other command to activate the setting? thanks + +I've pinged the device expert, please expect a response within two business days. + +Lurii, I have not seen this and programmed a value of 1 myself to test. Are you sure the gauge is receiving the [Gauge Stop] command? The [GA] bit should clear if so. I also don't recommend a value of 1 second. the gauge needs time to fill in the voltage sampling buffer to accurately calculate the measuredZ. Thanks, Eric Vos + +Thanks for reply. Regarding "the gauge is receiving Stop command" i'm not sure, i need to verify this with logic analyzer. 1. As far as, I get it the GA bit should be cleared after Stop command is received properly (correct me if I'm wrong). So, should I check GA bit instead of G_DONE in the Control_Status? What is the purpose of G_DONE bit? 2. What is the minimum value of R data seconds reg. to get accurate value of voltage, current and temperature? This is quite weird behavior, because at the first i used the default value of R Data Seconds (15 sec) and the following sequence: - enable BQ; - start BQ (send command and wait until bit GA is set); - stop BQ (send command and wait until bit G_DONE is set); - read data form BQ; - disable BQ; In this case it takes around 15 sec. to read data from BQ (as expected according to datasheet). Then I tried to reduce R Data Seconds to less value (1 sec, 5 sec, 10 sec), but instead of reducing response time it takes unexpected ~4 min to read data (to wait until G_DONE is set). Perhaps the right sequence should be the following: - enable BQ; - start BQ (send command and wait until bit GA is set); - stop BQ (send command and wait until bit GA is clear); - read data (); - disable BQ; Please, provide me a feedback. Thanks. + +1) yes sending Gauge_Stop should set GA =0 if it was received properly by the gauge. 2) The minimum we recommend is 15Sec which is why it is our default. If it needs to be lower testing should be done on your side to make sure results are consistent. Both procedures should work, but since measuredZ and SOH are updated after GDone. I would follow - enable BQ; - start BQ (send command and wait until bit GA is set); - stop BQ (send command and verify bit GA is clear); -Wait until GDONE = 1 - read data (); - disable BQ; + +hi, followed the recommendation of Eric Vos24 and figured out that after sending STOP command the [GA] bit is still set and furthermore waiting for bit [G_DONE] to be set never happens (it is 0 for a very long time). It seems that there is a problem with STOP command. I tried to set R Data Seconds reg. to different values (1 sec, 5 sec, 15 sec), but the result is the same (wait bit [G_DONE] set for a very long time). What might be the problem with STOP command (other command seems to work properly)? + +Hello Iurii, Can you wait for a while longer prior to sending STOP? Say 2 more seconds? + +Hi, yes I tried this, but result is the same (bit GA is still set after STOP command has been sent). After START has been sent MCU waits for [GA] bit is set (first line on the Logic analyzer log: 0x81) then MCU wait for 2000 ms and sends STOP command (0x12 line 5), then MCU check [GA] bit, but it is still 1 (last but one line 0x81) + +Hi, yes I tried this, but result is the same (bit GA is still set after STOP command has been sent). After START has been sent MCU waits for [GA] bit is set (first line on the Logic analyzer log: 0x81) then MCU wait for 2000 ms and sends STOP command (0x12 line 5), then MCU check [GA] bit, but it is still 1 (last but one line 0x81) + +Hi, yes I tried this, but result is the same (bit GA is still set after STOP command has been sent). After START has been sent MCU waits for [GA] bit is set (first line on the Logic analyzer log: 0x81) then MCU wait for 2000 ms and sends STOP command (0x12 line 5), then MCU check [GA] bit, but it is still 1 (last but one line 0x81) + +It most likely might be that your voltage is not stable yet. Can you provide us a bqStudio log file? + diff --git a/data/text/DLP2/886577 b/data/text/DLP2/886577 new file mode 100644 index 0000000000000000000000000000000000000000..7a013dff270d61b4ebab51e40b77c1ecaf71dba3 --- /dev/null +++ b/data/text/DLP2/886577 @@ -0,0 +1,24 @@ +BQ27Z561: BQ27z561 - Battery SOC suddenly jumps from 100 to 0 in few seconds + +Part Number: BQ27Z561 Hi, We are using BQ27z561 for battery management in our product. Recently we have seen instances where in the battery SOC suddenly jumps from 100 to 50 and sometimes from 100 to 0 within 1 seconds. After this, this the fuel gauge reports LOW battery warning. When the device is kept for charging, the SOC suddenly jumps to 100% within 10 minutes. Regards, JIju Chacko + +Hi JIju, Did you guys choose a proper chemistry id to match your battery? Did you successfully run the learning cycle? Andy + +Hi Andy, Yes. the configuration are proper and the device works as expected in our testing environment. The issue reported is from the field testing. With the help of few field engineers we got the know the root cause of the issue. The battery is getting disconnected temporarily and this reboots the device. On the next boot the SOC reading get jumbled up. Currently we have BQFS, GMFS and SREC files generated from the Battery Management Studio application. Do we need to write these files again? What will be the process to calibrate the fuel gauge when connecting and new battery? + +The files can be used for mass production. Basically, you program one of these files to a fresh device. Regarding the calibration process, please see the Calibration section of bq27z561 TRM. + +Hi Andy, I think there is a confusion in understanding the issue. We have followed the steps of calibration from the TRM as you stated. And the device with the battery connected works perfectly as per requirement. In our design, the battery gauge is directly powered from battery. In this case, if the battery is removed for some reason. then on connecting the battery again we see a difference in the battery SOC. I understand there will be some difference as the battery gets relaxed in removal of load. But still the difference of ~70% capacity is not expected. My question is, in case of new battery connection or intermediate battery removal and insertion, do we need to perform any steps in the fuel gauge ? + +Try sending a RESET command to the gauge device. The SoC should be updated again. Andy + +Hi Andy, We are using below commands from the driver. We added a custom SYSFS entry which will reset the device after power cycle or during battery replacement. case POWER_SUPPLY_PROP_ENABLE_IT: { if(val->intval){ fg_enable_gauge_it(bq); fg_reset(bq); } break; } Just want to confirm if these are the only required steps and we don't need to perform any other operation. Regards, Jiju Chacko + +Unfortunately, there is no way for me to verify your code. Here is my suggestion. Basically, make sure that the gauge device is NOT in the SEALED mode before sending the RESET command. + +Hi Andy, As you can see below. Even in cases where the battery is not removed, we see difference in the battery SOC reported by the fuel gauge. As per our conversation earlier, we added command to set GAUGE_EN=1 and then send a reset command. [ 20.760000] [bq27z561] fg_irq_thread: RSOC:7, Volt:3704, Current:0, Temperature:371 [ 20.770000] [bq27z561] fg_irq_thread: VOLT_HI clear [ 20.780000] [bq27z561] fg_irq_thread: TEMP_HI set [ 20.780000] [bq27z561] fg_irq_thread: VOLT_LOW clear [ 20.790000] [bq27z561] fg_irq_thread: TEMP_LOW clear [ 20.790000] [bq27z561] fg_interrupt_event_provider: status = 4, bq->cache_hi_temp = 0x0, bq->high_temp_threshold_status = 0x0 [ 20.800000] [bq27z561] fg_interrupt_event_provider: Low temperature interrupt received via high temperature threshold set [ 20.820000] [bq27z561] fg_interrupt_event_provider: Low temp condition is cleared, setting current to 960mA [ 20.830000] bq25601_set_charge_current called via fuel gauge= 0x10 [ 22.530000] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 28.620000] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 32.030000] IPv6: ADDRCONF(NETDEV_UP): usb0: link is not ready [ 34.160000] [bq27z561] fg_unseal_complete_access: FG is unsealed [ 34.160000] [bq27z561] fg_enable_gauge_it: Data flash unsealed [ 34.470000] power_supply bms: driver failed to report `voltage_now' property: -1 [ 34.510000] power_supply bms: driver failed to report `voltage_now' property: -1 [ 36.960000] Battery charging disabled [ 36.990000] Battery charging enabled [ 43.740000] [bq27z561] fg_irq_thread: RSOC:14, Volt:3869, Current:960, Temperature:359 [ 43.740000] [bq27z561] fg_irq_thread: VOLT_HI clear [ 43.750000] [bq27z561] fg_irq_thread: TEMP_HI clear [ 43.750000] [bq27z561] fg_irq_thread: VOLT_LOW clear [ 43.760000] [bq27z561] fg_irq_thread: TEMP_LOW clear Regards, Jiju Chacko + +Hi Jiju, If the battery hasn't been removed, I will suggest you NOT send the RESET command to the gauge device. Here is my suggestion. After the battery is connected to the gauge and your system, don't power on your system. Instead, let the battery relax for two hours and then power on. I believe you will read back accurate RSOC readings. The purpose of the 2-hour relaxation time is to let the gauge take an OCV measurement and update the FCC, RemCap, and RSOC. Andy + +Hi Andy, 2 hours is too long. I was expecting this time to be in seconds. Can you tell me if there is procedure to forcefully calculate battery OCV. Regards, Jiju Chacko + diff --git a/data/text/DLP2/887030 b/data/text/DLP2/887030 new file mode 100644 index 0000000000000000000000000000000000000000..5aaa0f3534b48d6b5def794482451e432ad864b0 --- /dev/null +++ b/data/text/DLP2/887030 @@ -0,0 +1,22 @@ +UC2526: Regulated PWM Output + +Part Number: UC2526 Dear Sir, We are using UC2526 to control the Buck output voltage as per the attached schematic. Pin no: 1 of UC2526 error amplifier is set to 5V as a fixed reference. Pin no: 2 of UC2526 error amplifier is connected to 4N35 Collector (will vary based on feedback from 0 to 5V). we are using Type II Compensator to stabilize to loop External feed back input signal pass through LM358, BC547 and 4N35 to the Pin no: 2 of UC2526 error amplifier. Output signal from 4N35 output will be square wave (not pure analog signal) will this flow of schematic attached will adjust the duty cycle to regulate the output voltage ??. Please verify the schematic and suggets the your Valued inputs to achive the regulated PWM. Regards Murthy + +Hi Murthy, The schematic appears to be incomplete and I cant read it clearly from the post. Can you post it as a PDF. What is you end application? Thanks Peter + +Dear Sir, please find the attached Schematic for industrial use Regards Murthy Test Schematic.pdf + +Hi Murthy, Thanks for the pdf schematic, from what I can see there are no components on the CT or RD pins of the controller so it will not oscillate and there will be no PWM output. Have you looked at the UCC28C4x family of devices they have PSPICE and TINA models that you can use to simulate your circuit. They have variants that do 50% or 100% duty cycle and are only 8 pin devices. Regards Peter + +Dear Sir, Please find the attached schematic.1057.Test Schematic.pdf I have checked UCC28C4x IC TINA model. Please Suggest if any changes required. I need to control step down chopper + +Hi Murthy, When you say you want to design a step down chopper do you mean buck stage? Thecompany Webench tool will give you a complete schematic for a buck circuit. Regards Peter + +Hi Peter, Can you share your mail ID. I will share schematic with you. As you Know i am Using PWM IC UC2526 with reference previous posts Problem No 1: My PWM Pulses are missing after certain time period. Because i am using reset pin for my closed loop control using Optocoupler. But i don't what will be the adverse effect of missing PWM pulses on Buck Converter especially Inductor. I Want to resolve this problem.so that's why i am approaching you.By using this my output regulation is good.i testes the system by continuously running for 4 hours.Nothing is happened. But i heard sound from inductor apart from switching noise from starting till 4 Hours. Sounding like tak...after 2 or 3 sec....tak....after 2 or 3 sec....tak....I think these is happened because of missing pulses.Please confirm that this is not a big problem from experts in Power Electronics people from customer organization. Actions from my side: I tried by connecting optocoupler output to Inverting PIN and Comp Pin of UC2526. I am not getting PWM pulses output from UC2526 in closed loop.i think this is happened because of Compensation.if possible can you share closed loop control of Buck Converter application circuit using UC2526. it would be helpful. I Have some queries Question No:1 Comparator output connected 0 to 5V through optocoupler can be connected Invertering pin UC2526. Here i am attaching missing PWM pulses .JPG Hope you will help in solving my problem Regards Murthy + +Hi Murthy, I am closing this post as we have moved support to email, please respond to my last email so we continue to work on this problem. Regards Peter + +Dear Sir, I replied to your last mail with PDF document & Schematic Regards Murthy + +Hi Murthy, Since we are communicating by email I am going to close this post. Regards Peter + diff --git a/data/text/DLP2/887655 b/data/text/DLP2/887655 new file mode 100644 index 0000000000000000000000000000000000000000..145e4479bea26894b62fa3e706485d0a096c68d7 --- /dev/null +++ b/data/text/DLP2/887655 @@ -0,0 +1,24 @@ +UCC28251: Queries about PSpice Average Model + +Part Number: UCC28251 Hi Team, In UCC28251 average model (slum358.zip), the DC value of output keeps at 90.2V regardless of the change of Vin (200~800V). Is it as expected? Thanks Hongjia + +Hi Hongjia, The circuit has a closed loop feedback circuit U7 and U5 that should maintain a constant output voltage over the full input voltage range so I think the circuit is behaving as expected. U7 is essentially the voltage loop error amplifier, the output voltage is divided down by R33 and R34 principally. If the voltage at the REF pin of the TL431 exceed 2.5V the TL431 will start to shunt current and pull current through the diode of the opto-coupler. This in turn will demand a lower duty cycle to maintain a constant output voltage. Regards Peter + +Hi Peter, Actually, I am the designer of this half bridge power supply, the operation conditions are as below: Switching frequency:100 kHZ Input voltage: 200~800 Vdc Output voltage: 24 Vdc Output power: 180W Rated,216W Max, XFMR turn ratio: 3.714, Primary inductance:1000uH typical, Input voltage feedward used, voltage mode, Primary side control, use diodes as secondary side rectifier, Type III compensation network with TL431B and Zener. This power supply works fine in the steady state, but when I test the load transient capability(1A to 9A,1A/us max), I find the voltage at the pin ILIM will exceed 0.5V for a certain time, the higher slew rate of load transient, the longer overcurrent lasting time; the higher load transient, the longer overcurrent lasting time.(9Amps load is still below steady state OCP setpoint).Also, during the load transient, the waveform ILIM shows imbalanced primary current, but it will recover balanced in the end. 0A to 5A load transient 0A to 5A load transient2 if the overcurrent lasting time is longer than the OC delay time set by the cap at the pin HICC, UCC28251 will shut down the output and enter into hiccup protection mode, if I want to improve the load transient capability, I have to increase the OC delay time. when I test 2A to 7.5A load transient, the output voltage fluctuation seems acceptable. My question is: 1. why does the voltage at ILIM exceed 0.5V and the imbalanced primary current happen when load transient? is it due to loop instability (phase margin and gain margin are not enough) or is it the inherent characteristics of half bridge power supply or the issue of UCC28251 or something else? 2. Cancompany provide a unencrypted transient pspice model of UCC28251 so that I run the transient simulation in the LTSpice? Best regards, Chengjun Wang + +Hi Chengiun, It looks like a control loop instability from looking at the ch 4 which i assume is the output voltage, have you tried reducing the gain by a factor of 10 in the control loop to see what effect it has? When you say primary side control do you mean that the controller is on the primary side and that the feedback signal is been fed back through an opto-coupler from the secondary side where the voltage error amplifier is located? Regards Peter + +Hi Peter, The CH4 is the output voltage with measured by AC coupling, so it should be the ripple voltage. why do you think it is a control loop instability? How to reduce the gain by factor 10 in the control loop and why does it help? The controller is on the primary side, the feedback signal is fed back through an opto-coupler CNY17-3 from secondary side. Best regards, Chengjun Wang + +Hi Chengjun, Sorry for the late response here, to decrease the gain I would increase the value of R5o from 1k to 4k7 or 10k. I would also DC couple the scope probe when measuring Vout during the load transient and offset the 0V level so the signal is still displayed on the screen. Regards Peter + +Hi Peter, Thanks for your reply. I will try to increase R50 value in the real test, but it seems no big difference from the average model simulation. R50=1K R50=4.7K R50=10K also, the load transient waveform i shared in the previous reply was captured at the load side so that we see the DC level of voltage (AC coupled) is changing. here i attach the load transient waveform (AC coupled) which is close to the power supply output, i think it is good from the perspective of loop stability. 630Vin 2A to 7.5A_P24 ripple voltage The below is P24 voltage fluctuation (DC coupled) during load transient from 1A to 9A succefully, 630Vin_1A to 9A_P24 And the next chart show the failed load transient, you can see P24 doesn't drop too much during load transient, but due to the voltage of ILIM pin exceeds 0.5 more than 7.52ms, it shuts down the gating signals. 565Vin_1A to 9A_P24_failed Best regards, Chengjun + +Hi Chengjun The load transient wave appears to be underdamped, reducing the gain will help reduce the overshoot when recovering but it will increase the initial dip or overshoot voltage. Have you tried to change the gain on the board? Thanks Peter + +Hi Chengiun, I hope you have made some progress in the meantime. Since there has been no reply to my last post for nearly a week I am going to close this post. Please open a new post if you have more questions. Regards Peter + +Hi Peter, Sorry for delay reply. i have tried to change R50 to 10k, and the test results showed that this power supply will still enter into hiccup mode when load transient from 1A to 9A with 12A/ms slew rate. Also I compared the load transient result with R50 =1k versus 10k, it seemed that the voltage overshoot and undershoot at R50 = 10k was worse. 630V_2 to 7.5A_ R50=1k （please ignore the first step since it is from 0A to 7.5A and UCC28251 enters into OCP mode） 630V_2 to 7.5A_ R50 = 10K Best regards, Chengjun + +Hi Chengjun The change in the transient response with the larger value of resistance in series with the opto-coupler is as expected. The gain will be lower and the output voltage deviation during the load transient will be higher. I was hoping that the lower gain and slower response may help the imbalance during the load transient. The OUTA and OUTB PWM should be matched to ensure equal volts-seconds across the transformer so eliminate saturation. Can you check the COMP signal, and OUTA and OUTB pulse width during the load transient when the imbalance occurs. Maybe there is noise on the COMP pin signal that is causing and issue.You will need to use a timebase of 5us/div to capture the signals with good definition. Regards Peter + diff --git a/data/text/DLP2/887790 b/data/text/DLP2/887790 new file mode 100644 index 0000000000000000000000000000000000000000..b1dd7bcdc3a6fc73d4e635b581026d929b23b350 --- /dev/null +++ b/data/text/DLP2/887790 @@ -0,0 +1,24 @@ +SM72442: question of I2C write data sequence. + +Part Number: SM72442 in the datasheet of SM72442, for I2C write sequence there is 8 data bytes from frame 4 to frame 11. if frame 4 is data 1, why frame 11 is data 7(it should be data 8)? ,and one of I2C registers is 7 bytes long, why write 8 bytes data? + +Hi i think it should be a typo. the data bytes is 7 instead of 8 from frames 5 to 11. I don't have EVM as it is quite old device. do you have an IC to try? + +thank you so much. I am writing the software , so should i think the frame 11 is no need. please check page 14 of the datasheet of SM72442, NOW the hardware is not ready ,so i cannot test on the software ,but i want to write the right sofeware. + +Hi, i think you are right. the data is from frame 4~ frame 10. I will also try this after getting the EVM. + +Hi User, sorry for the late, but i'm still waiting for the EVM. thanks for your understanding. + +Hi User, i got the EVM, and will try the I2C. what is the status in your side? + +Hi, your understanding is correct. the data frame should be from 4 to 10. the 11 is not need. let me know you see issue. + +THANK YOU for your work, I think this problem is fixed, now I change this chip to 72445 , 72442 need so high frequency PWM ， my NMOS can not work well, MY another question ,do you have saw it? + +Hi Sorry, which question do you refer to? + +IT is difficult to Calculate the value of inductance and capacitance, I have find the ripple of No load output Voltage achieved 20%, the inductance is 22UH capacitance is one single Electrolytic capacitor of 330uf。 the load is BLDC motor ， not charge for battery, is some problem ?? can you check for me ,of course if you have time, thank you if you have time I will send to the Schematic diagram, now I hope you just give some advice about how to select the inductance and capacitance. best regard + +could you share the schematic? also share the VIN and VOUT waveform to show that your observation. + diff --git a/data/text/DLP2/887810 b/data/text/DLP2/887810 new file mode 100644 index 0000000000000000000000000000000000000000..64c477b6b4b64e79644e22b0776d002c00adac8e --- /dev/null +++ b/data/text/DLP2/887810 @@ -0,0 +1,24 @@ +How to Use LOW_POWER mode of Tas2559 + +Hi: 1、requirement info: system: linux , and use iic to connect tas2559,use 1.1、When there is no player to play music ,and the speaker to be silence , I need to set tas2559 to be a low power mode . 1.2、When Player is playing music，I need to resume tas2559 to normal mode. 2、I read the pdf 3、I get the info : "9.6.2.35 LOW_POWER (book=0x00 page=0x00 address=0x79) [reset=0h] " 3.1、low power mode :I set iic from user space { 0x00, 0x00 }, { 0x7f, 0x00 }, { 0x79, 0x80 }, if I set this data to tas2559 , I can not hear sound . 3.2、normal mode :I set iic from user space { 0x00, 0x00 }, { 0x7f, 0x00 }, { 0x79, 0x00 }, after I set step 3.1 , then I set this data to tas2559 ,the sound cat not resume , I can not hear sound too. So I will never Hear sound unless to reboot system; (Please help me check the step 3.1 and 3.2 , is that right ? can I use the reg to get low power mode ) 4、when I read driver source , and find "#define TAS2559_SLEEPMODE_CTL_REG TAS2559_REG(0, 2, 7)" then I can not find info from PDF。Can this reg set the device to be a sleep mode ?if can ,then how can i use it , set which date to tas2559 ,let it switch between low power mode and normal mode . can you give me a demo. thanks! + +Hi Zhijain, Could you try to send these commands after step 3.2? These are taken from device data sheet, power up and unmute sequence: ################### CHANNEL POWER UP #################################################### w 98 05 A3 # Power up Analog Blocks w 98 04 B8 # Power up DSP and clock dividers w 98 07 00 # Unmute Analog Blocks w 98 7f 64 # switch to book100 w 98 07 00 # Soft stepped unmute of audio playback ############################################################################################ I'll double check on my side if these are required when toggling bit 7 from register 0x79. Best regards, -Ivan Salazar Applications Engineer - Low Power Audio & Actuators + +0x4e is my iic address. and I can hear sound ,then to set regs : step 3.1: # i2cset -f -y 1 0x4e 0 0 # i2cset -f -y 1 0x4e 0x7f 0 # i2cset -f -y 1 0x4e 0x79 0x80 Now I cant not hear sound . step 3.2: # i2cset -f -y 1 0x4e 0 0 # i2cset -f -y 1 0x4e 0x7f 0 # i2cset -f -y 1 0x4e 0x79 0 # i2cset -f -y 1 0x4e 0x05 0xa3 # i2cset -f -y 1 0x4e 0x04 0xb8 # i2cset -f -y 1 0x4e 0x07 0x0 # i2cset -f -y 1 0x4e 0x7f 0x64 # i2cset -f -y 1 0x4e 0x07 0x0 but after I set these regs , There is no sound , the speaker is still silence + +Zhijain, Writing into register 0x79 is similar to using the software shutdown, so the device has to be re-initialized when coming back from low-power mode. For sleep mode you can use the recommendations from section 9.5.3 from the data sheet. You can also take a look at this previous post about TAS2557, but it also applies to TAS2559. Best regards, -Ivan Salazar Applications Engineer - Low Power Audio & Actuator + +Hi: 1、please help me check the script . 2、Can we save more power in the sleep mode . The sleep mode :I execute the script "sleep.sh", and then the device is no sound. sleep.sh: i2cset -f -y 1 0x4e 0x07 0x01 sleep 2 i2cset -f -y 1 0x4e 0x7f 0x00 i2cset -f -y 1 0x4e 0x07 0x03 i2cset -f -y 1 0x4e 0x04 0x20 i2cset -f -y 1 0x4e 0x05 0x00 i2cset -f -y 1 0x4e 0x00 0x00 i2cset -f -y 1 0x4e 0x04 0x00 i2cset -f -y 1 0x4e 0x00 0x00 i2cset -f -y 1 0x4e 0x7f 0x00 The powerup mode : I execute the script "powerup.sh", and then the device has sound . powerup.sh: i2cset -f -y 1 0x4e 0x00 0x00 i2cset -f -y 1 0x4e 0x7f 0x00 i2cset -f -y 1 0x4e 0x05 0xa0 i2cset -f -y 1 0x4e 0x04 0xf8 i2cset -f -y 1 0x4e 0x07 0x00 i2cset -f -y 1 0x4e 0x7f 0x64 i2cset -f -y 1 0x4e 0x07 0x00 this table is test by our hw engineer for the device in the sleep mode . In sleep mode the power of "DVDD" is high, Can this power be lower? we find in specifications 7.5 of , + +the table here ! + +Hi Zhijain, I expect to be able to run some tests on the low-power mode by the end of this week. I'll provide you some updates as soon as possible. Best regards, -Ivan Salazar Applications Engineer - Low Power Audio & Actuator + +Hi Ivan : I use this device In linux system, driver file :. I think I shuld modify the driver source to sw sleep mode and powerup mode instend of use "i2cset" cmd to set iic . So I want to know How to modify the driver source of tas2559: 1.Let the driver automatic get into the sleep mode (auto set the registers in driver ) When there is no music playing in the system . 2.Let the driver automatic get into the powerup mode (auto set the registers in driver ) while there is some music playing in the system . thanks 1 + +Zhijain, I'm unable to answer driver related questions, please let me communicate your questions to our SW team and get back with further comments. Best regards, -Ivan Salazar Applications Engineer - Low Power Audio & Actuator + +Zhijain, Some comments from our software team: The sleep and powerup feature is available in TAS2562 onwards. We don’t have auto Power up and power down of amplifier based on I2S clocks. In tas2559, the only way is to explicitely powerup the device using i2c when music is available to be played. Best regards, -Ivan Salazar Applications Engineer - Low Power Audio & Actuator + +Hi Ivan: Thanks ! Count you check the messages ,I sent it to you at "Mar 16, 2020 8:58 AM" . 1、please help me check the script ,"sleep.sh" and "powerup.sh" . 2、Can we save more power in the sleep mode . + diff --git a/data/text/DLP2/888430 b/data/text/DLP2/888430 new file mode 100644 index 0000000000000000000000000000000000000000..f72283e7e95d9792ac0e045f6387a7817ad5e138 --- /dev/null +++ b/data/text/DLP2/888430 @@ -0,0 +1,22 @@ +LMZM23600: Output voltage too low + +Part Number: LMZM23600 We are using the LMZM23600V5SILT on a prototype to generate a 5 volt output from a 20 volt input. With an approximately 2 mA load (the minimum feasible at this time), the output on the prototype is slightly less than 3 volts; adding a 100 ohm resistor load reduces the output to around 2 volts. With the minimal load, the output voltage appears stable on the oscilloscope; with the 100 ohm load, the output is erratically varying by 250 mV. The circuit diagram is the same as Figure 37 with the exception that feedback is directly connected to the output without any resistors. Cin (C1102) is 10 uF 50 v X7R and Cout (C1101) is 47 uF 16 v X5R. The board layout is approximately the same as that shown in Figure 82 of the data sheet. The differences for the layout are: 1. Footprint pad size is 0.45 x 0.8 (recommended footprint has 0.3 x 0.65) 2. FB and OUT are both connected directly to a component side power plane 3. Under component ground plane fill has 0.225 gap to component pads. Are these differences likely to account for the problem? Are there exposed pads on the underside of the component that could be shorting to the ground fill under the component? Or does it seem more likely that either the component is bad or there is a solder bridge between pins? Thank you for your help. + +Hi J A Valina, Can you probe the SW node to check the switching frequency of the part? This can be done by probing the top side of the exposed inductor. Please be careful when probing the exposed terminal and make sure not to accidentally short it to GND. Doing so will damage the part. Additionally can you read out the voltage measurements on each pin? As for the PCB layout, generally I would recommend having a small thin trace connecting feedback to VOUT. The feedback pin is generally considered a sensitive node since it can couple noise if there is a large enough plane. This may result in output voltage regulation issues. Note that Figure 82 also shows the thin feedback connection to VOUT power plane. Another thing you can do is try to mechanically press on the part and check regulation. This will exercise if there is any pin connectivity issue which would point to solder voids/ no connects. You can reflow the part off your prototype board and examine both the part and your board to see if there are any solder bridges. Regards, Jimmy + +Hi Jimmy, Here's the SW node trace: It appears to be oscillating at 754 kHz (the frequency shown in the image above is incorrect). I cannot probe most of the pins since the pads are concealed by the module, but Vin is 20.43 v and Vout is 2.94 v. Pressing down on the module had no effect. I will alter the PCB layout of the FB pin for the next prototype. Thanks for your help! Jay + +Hi Jay, If you are using a fixed output power module (LMZM23600V3 or LMZM23600V5) then the switching frequency is expected to be typical at 750kHz. However, the switch node doesn't look like a square-wave. As previously mentioned, please try to reduce the parasitic inductance on FB node by having a thin dedicated trace to VOUT for fixed output option. Let me know if you have any additional questions on this. I will close this thread for now. Regards, Jimmy + +Hi Jimmy, Do you think that having the solid connection from FB to VOUT is the cause of the problem? It seems to me that connecting FB to VOUT by a thin trace would increase rather than decrease the inductance. Thanks for your help! Jay + +Hi Jay, Let me redact what I said previous, for some reason during the explanation I was thinking adjustable when you are using fixed. Actually when you are using the fixed version, the feedback resistors should be internal. This means the sensitive node is protected and accounted for internally. I don't think I asked this, how many of your boards experienced this failure? Also was the part hand soldered onto your prototype or did it have a control reflow profile? Again the switch node is abnormal and should be a clean square wave. Can you do a ABBA test on two prototype boards to see if the failure follows the part? Regards, Jimmy + +Hi Jay, Can I get an update on the questions above? What is the progress of the ABBA test? Does the failure move with the unit? Additionally what are you power downstream? If possible try to isolate the circuit by disconnecting the downstream system and retest troubleshooting with either a load resistor or E-LOAD to check operation of the LMZM23600 alone. Regards, Jimmy + +Hi Jay, Can you give an update to the ABBA testing? Have you tried continuity test? You can probe the voltage measurements between all pins and ground to get an understanding if there is any shorts or abnormal voltage. Also I have a few more questions about this condition: Just to reconfirm you application condition: VIN = 20V; VOUT = 5V; IOUT = ~50mA; Tambient = 25degC (room temperature) What peak temperature was the device reflowed at? Was the device hand soldered or did it go through a controlled reflow process? Can you provide the date and lot code for these parts? This information is usually detailed in the shipping label on the package. How many failures has this been observed on? I'm guessing this failure is seen on the same site on different boards? Regards, Jimmy + +Hi Jay, Any updates on the testing and feedback for my questions? Again I'd like to reiterate that the switching waveform that you measured is not characteristic of a switching converter (generally square wave). I'd like to see the same test done on a new unit on the same PCB layout to confirm issue is preserved. Regards, Jimmy + +Hi, I have not heard back from you for some time and will assume you were able to close this issue on your end. Because of this, I will be closing this thread for now. If you have any further questions on this, please reply back to this and the thread will reopen for further discussion. Regards, Jimmy + diff --git a/data/text/DLP2/888827 b/data/text/DLP2/888827 new file mode 100644 index 0000000000000000000000000000000000000000..4f6197604674aab0548ec8b6176fa5ab112a8024 --- /dev/null +++ b/data/text/DLP2/888827 @@ -0,0 +1,24 @@ +LM5041: Feedback loop Compensation + +Part Number: LM5041 Hi Every one: I need to clarify LM5041 application circuit compensation design. Application circuit error opamp pole and zero placed below freq. Error op amp zero 1 placed by R35,C36 @ 1.326KHz Error op amp zero 2 placed by R32,C40 @ 22.9KHz Error op amp pole 1 placed by R42,C40 @96.7KHz Error op amp pole 2 placed by R35,C35 @279KHz My question 1) Op amp first zero placed in plant double pole L=60uH, Cout: 932uH F=673Hz? 2)Op amp second zero placed freq where should get? 3) I dint find Cout ESR value. Pole 1 placed in plant zero? I think Pole 2 placed almost in buck switching freq.LM5041..docx 3) How to compensate opto pole by error opamp in this application? 4)Kindly share any document available for compensation design for this application. (Opto coupler feedback with external opamp) 5) R11 and C11 form the opto pole? Kindly reply as soon as possible. Regards, Kubendran + +Hellocompany Team, I am expecting your valuable reply. Regards, Kubendran + +Hellocompany Team, We are facing loop compensation and buck switching node voltage oscillation issue with respect to LM 5041 application circuit design. Always i seen LM5041 related query response very delayed. Kindly reply previous query. Regards, Kubendran + +Hi Kubendran, Sorry for the delay, the office that supports this controller was on public holiday, I have assigned an AE to this post. Regards Peter + +Hi Peter, When will i expect the reply. Regards, Kubendran + +Hellocompany team, No reply? Regards, Kubendran + +Hi Kubendran, My mistake, there was a mistake in the email address for the AE in the system and this post did not appear on his list. I am checking if the AE assigned can support if not I will assign a new AE to help. I should have an update tomorrow. Regards Peter + +Hi Kubendran, Unfortunate, I didn't find any document for the compensation design of this application. In this application, the designer used much complex two stage network with two LM6132 op amps and a LM4041 reference. I guess this circuit demonstrates the flexibility that can be used in electronic circuit design. I think it can be designed simpler with only one amplifier LM6132 and one reference LM4041. Since in this application, there is no internal error amplifier used, so it relies on the designer to add the error amplifier. It is targeted at isolated designs the error amp is usually on the secondary side driving an opto-coupler through the isolation barrier to the control pin. The schematic in page 14 of the LM5041 datasheet shows such a scheme. U4A is the error amplifier. C35, R35, C36, R42, C40 and R32 make up the type III compensation network. Regards, Teng + +Hi Sir, Please read carefully my previous query. What you are said error op amp R and C value corresponding pole and zero frequency already calculated. My question how you are placed compensator pole,zero and opto coupler pole to the plant response. If i consider plant is double pole that value not matched with actually what you are used in compensator pole and zero. Actually current mode plant having one pole and one zero. In this way also checked compensator value did not matched. Kindly look this one serious and give best solution.I am facing converter output oscillating issue. Regards, Kubendran + +Hi Kubendaran, Did you made a measurement of the gain, phase or if you have done a load transient test and measured the response of the output voltage waveform to see if the response with well damped or under damped. I don't think we can get a final value through calculation, actually it is complected and difficult to establish the signal model. My suggestion is: please adjust the compensation according the measured transient performance. Regards, Teng + +Hi Sir, I will share the waveform to your mail. Please reply. Regards, Kubendran. + diff --git a/data/text/DLP2/889755 b/data/text/DLP2/889755 new file mode 100644 index 0000000000000000000000000000000000000000..cdfb424b476dae154f99e37dcabf1c92c4d74e1d --- /dev/null +++ b/data/text/DLP2/889755 @@ -0,0 +1,12 @@ +AWR1642: AWR1642 Radar Monitoring Asynchronous Events lost + +Part Number: AWR1642 I set 8 Radar monitoring items, Temperature, Rx Gain Phase, Rx Noise Figure, IF stage, Tx0 power, Tx1 power, Tx0 ballbreak, Tx1 ballbreak, In MmwDemo_mssMmwaveEventCallbackFxn, I can not get the msgId (RL_RF_AE_MON_TEMPERATURE_REPORT_SB and RL_RF_AE_MON_RX_GAIN_PHASE_REPORT) but the other I can get correctly. What's wrong with this? Should I change rlRfCalMonTimeUntConf_t.calibMonTimeUnit? My SDK is mmwave_sdk_02_00_00_04 Thank You Liang-Yu + +Hi, The monitors may not be supported in the firmware version you are using. Please refer to the documentation of the firmware release. (Radar Interface Document in the DFP release) You probably should upgrade your application to use the latest firmware provided with SDK 3.3 thank you Cesar + +Hi, I have upgraded FW to the latest version (SDK 3.3), but MmwDemo_mssMmwaveEventCallbackFxn still does not have the Temperature and Rx Gain Phase report. How to fix this? Thank you Liang - Yu + +Hello Liang - Yu, Could you refer mmwavelink test application from mmWave SDK which tests these two features. control\mmwavelink\test Regards, Jitendra + +Hi In mmwave Demo's dss_main.c, I add these functions ( rlRfTempMonConfig, rlRfRxGainPhMonConfig, ， rlRfRxNoiseMonConfig, rlRfRxIfStageMonConfig, rlRfTxPowrMonConfig, rlRfTxBallbreakMonConfig) in MmwDemo_dssDataPathConfigCQ. I still can't get temperature and Rx gain phase, but the other items can be received by MmwDemo_mssMmwaveEventCallbackFxn in mss_main.c. Is it correct to add these functions in here? Thank You Liang-Yu + diff --git a/data/text/DLP2/890211 b/data/text/DLP2/890211 new file mode 100644 index 0000000000000000000000000000000000000000..2015b4c54fab72118ac3f8520c43af22a60e0b19 --- /dev/null +++ b/data/text/DLP2/890211 @@ -0,0 +1,24 @@ +TPS2493EVM-002: IMON spurious output + +Part Number: TPS2493EVM-002 I am evaluating the TSP2493 using the EVM-002 board. We plan to use the part with an MCU and monitor the output current, and use the UVEN line to control the output. During my testing, using the ENA/DIS switch on the PCB, I noted that sometimes the IMON output would go to full scale for about 200uS immediately after being enabled. To speed testing and eliminate any variables due to manual switching, I connected a signal generator to the UVEN line (see attached PDF). For this testing, no load was attached to the PCB. The only circuit elements present on VOUT are C3, C9 and D2 as indicated in the EVM schematic. What I then observed, is that depending on the PRF (repetition frequency), IMON either glitches, or does not glitch, immediately after UVEN goes high. For example, at 5.0Hz PRF, IMON behaves correctly when UVEN is asserted. At 5.1Hz, IMON goes full-scale for 200uS every time UVEN is asserted. I observed this behavior from as low as 0.7Hz, to as high as 20Hz, with variations in PRF from 0.01 to 0.1Hz causing a change in IMON behavior. There are 3 scope plots in the attached PDF. The two plots that show IMON indicate a small damped hump starting about 400uS after UVEN is asserted. This is the charging current of the capacitor(s) on VOUT. The third plot shows that VOUT has not begun to turn on yet when IMON goes full scale. All other signals (FAULT, PG, TIMER), maintain a steady value throughout the ON period. In other words, no other operation anomalies are observed, it seems that the IMON output is the only affected signal. TPS2493_IMON_Glitch.pdf Thanks for any insights, Will + +Hi Will, Thanks for reaching out! We have never observed that kind of behavior. Can you capture Vout, input current, UVEN, IMON in a single scope shot for the second test scenario where IMON pulse is observed and share it with us Thanks, Rakesh + +Thank you for the quick reply. I apologize that I do not have the appropriate test equipment to perform the measurement as requested. I have one additional piece of information which I dismissed but in retrospect may be important, and why you've never seen this. During my very initial tests, using just a power supply and active load, one of the two MOSFETS failed. It failed shorted Drain-Source (Gate/Source and Gate/Drain did not show a short). I desoldered the failed MOSFET, and have been testing since using the remaining MOSFET. The gate drive seems fine. I cannot explain what happened that cause the MOSFET to fail. It actually blew a blob of solder out from underneath it, when it heated quickly and then presumably failed. Part of the thermal pad appeared discolored... perhaps the part had a coating flaw or contamination causing lack of reflow to the land, and subsequent hot-spot. I assumed the TPS2493 was unaffected after this event, but perhaps whatever happened compromised the part somehow. + +I should add that though I currently cannot capture 4 channels at once, the behavior I observe on the scope is very repeatable. For example Vout looks the same the entire time the PRF is set to cause the IMON glitch. How do you propose I measure the input current? I assume you mean a direct measurement using a current probe? + +Hi Will, Thanks for the additional background details. Do you have another TSP2493 device to replace on EVM and to check whether the behavior is repeatable or not? By this, we can also rule out that partial unknown damage for the original unit is not the cause. If you have current probe, measure the input current along with the IMON voltage to check whether they follow in time Best Regards, Rakesh + +Hi Rakesh, I will order a few new parts, or another EVM altogether, and report back. Continued testing shows everything else works as advertised (power limiting during startup, etc) Will + +Hi Will, What are your target specs and requirements. ? Can you have a look at TPS25982, TPS1663x devices and let me know what you think. Regards, Rakesh + +Hi Rakesh, Thanks for the recommendations. Based on our requirements, it doesn't appear either are suitable unfortunately. We are looking to run between 24-48V (surge to 50V), with up to 20A continuous current, with hardware-based fast transient overload protection, with slower MCU-based eFusing (i2t behavior). The application will have about 20 of these output channels, so keeping power dissipation low per channel is important for passive heat rejection which is also a requirement for us. I am looking at using the TPS2493 (or something equivalent) with an LM5050 ideal diode output in series (and a suitable TVS on the final output), with both controllers using NVMFS5C604NLWFAFT1G as the pass element. I am open to other topology or part number suggestions. This is what I've come up with after going through a previous design and prototype iteration, and new requirements being added (higher voltage, higher current, faster performance). Also perhaps worth mentioning, I am looking to protect the main power input using an LM5060 and 4x parallel of the above listed MOSFETs, to provide OVP shutdown and gross overcurrent protection, with 100A steady-state pass current. I just tested the LM5060 EVM and was happy with the performance. Thanks, Will + +Hi Will, LM5069 would be preferred over LM5060 device. LM5069 provides accurate overload protection, FET SOA protection (power limiting feature) and fast shutdown during short circuit events. The LM5060 is intended for applications where precise current sensing is not required, but some level of fault protection is needed. Examples are applications where inductance or impedance in the power path limits the current rise in a short circuit condition. Please refer 8.1.5 Overcurrent Fault in the datasheet. Please refer /lit/an/snva683/snva683.pdf for configuring the device for surge support Best Regards, Rakesh + +Hi Rakesh, I initially downselected to the 5060 vs the 5069 to eliminate the sense resistor, at the expense of a more uncontrolled current limit. I will re-evaluate based on your recommendation. Also, I have replacement TPS2493 parts coming, in addition to a new EVM. I will post results once they arrive and I can repeat the tests. Thanks Will + +Hi Rakesh, Sorry for the delay in getting back. There was an issue getting the package delivered with the current state of affairs. The new EVM behaves with the same spurious IMON output. I will attach a PDF with a graph of all the parameters of interest. Since I do not have a good way to probe the input current, I inserted a 10 Ohm resistor in series with Vin, and the measurement Vin represents the power supply output, and Vin' represents the input voltage to the TPS2493EVM board. As in my original post, I can elicit this response by actuating the ENABLE switch on the PCB. For my testing, I connected a signal generator to UV(EN), adjusted the frequency until the problem arose, and then performed scope captures at each point in the circuit, at all times monitoring IMON to ensure the behavior was still present. TPS2493_EVM.pdf Also attached is the Excel file with the raw data I collected. TPS2493_EVM.xlsx Thank you for any insights, Will + diff --git a/data/text/DLP2/890514 b/data/text/DLP2/890514 new file mode 100644 index 0000000000000000000000000000000000000000..3308c9835c2b09ad50cdd4cced56990625c8cd95 --- /dev/null +++ b/data/text/DLP2/890514 @@ -0,0 +1,24 @@ +BQ34110: initial steps to start communication with MCU + +Part Number: BQ34110 I am using BQ34110 ic for two LI-ion batteries. I am not getting any data for the commands such as DeviceType() , DeviceName() etc registers. Is there any configuration settings to be done before this. It would be helpful if I get complete step by step procedure to interface it as I wanted to have voltage, current , SOH, SOC information regarding my batteries. + +I would suggest you take a look at the app note below. /lit/an/slua790/slua790.pdf Andy + +Thank you for quick reply. When I am trying to read DeviceType() data,it is showing only 0000 values than 0110. Can you send the implementation function of atleast single control command on stm32 micro controller ? + +Sorry, we don't provide the code. I would suggest you use the bqStudio to communicate with the gauge device, capture the sequence using a logic analyzer and implement the same sequence in your microcontroller. Andy + +Can I get the flowchart or any algorithm to get at least DeviceType() or DeviceName()? I had made successful communication with bq34110 ic but when i was trying to get DeviceType() , the responce should be 0x1001 in little endien format, but I don't get response like that. Also, I am confused that when I send 0X01 data to 0x00 control register address and 0x00 data to 0x01 control register address, I should get its respective DeviceType() response at 0x40 /0x41 address. Please correct me if I am wrong. This is the sequence I am following in my implementation. + +We already provided all the details in the app note I provided before. Make sure you read through that app note and make good of the Advanced Coom tab to test the sequence. To get the right response for the DeviceType() MAC Subcommand, follow the steps below. ENTER: Start Register 3E, Bytes to Write 0100 and PRESS the Write button. The I2C words occur in the following order in the data stream: AA, 3E, 01, 00. ENTER: Start Register 40, Number of Bytes to Read 2 and PRESS the Read button. The I2C words occur in the following order in the data stream: AA, 40, AB, 10, 01 + +Hi Andy I followed steps given by you and got response as expected 0x0110 but when I tried for another sub command that is device name response is 00 D4 0B A9 0B FF FF in hex format and C C C C C C C in char format can u tell what is exactly missing here? also I dont have BQstudio with me . I am doing all my interfacing using i2c communication. Can I get default response values when perticular subcommand is used to cross check weather we are getting correct response or not + +I can read back the correct device name in the bqStudio, which is the same as the ASCII characters mentioned in the TRM. You would need to check your code. + +Hi Andy I will again check it considering your suggestions. I have some basic queries which are not cleared through TRM 1. Can we access consecutive sub commands one after other in a sequence? If yes then is there any delay to be added in between? 2. Is it mandatory to perform factory calibration before accessing any sub command also? I understood that it is important for voltage ,current , temp, SOH etc commands. 3. Without doing any setting what is default state of ic (sealed or unsealed) and mode (normal, snooze, shutdown) ? 4. How to check default configuration status in IC before writing for any command? Thanks in advance. + +See my comments below. 1. Can we access consecutive sub commands one after other in a sequence? If yes then is there any delay to be added in between? [Andy] Yes. I would suggest you add a short delay (e.g. 3ms). 2. Is it mandatory to perform factory calibration before accessing any sub command also? I understood that it is important for voltage ,current , temp, SOH etc commands. [Andy] No. However, if you want the voltage, current or temperature readings to be accurate. I would suggest you do the calibration first. 3. Without doing any setting what is default state of ic (sealed or unsealed) and mode (normal, snooze, shutdown) ? 4. How to check default configuration status in IC before writing for any command? [Andy] I would suggest you get an EV2400 and use bqStudio to check the default configurations. With the proper tool and software, it is much easier to work the gauge device. Andy + +Hello Andy, Thank you . Your suggestions was very helpful. With that reference, Can you help me more in things as bq34110 I2C note don't have that details: 1. I had evaluated default values of Pin control, Operation config A and design capacity registers as per guidelines. And now I wanted to change its values as per my design. I had followed following sequence: ------- calibration start ------- Data Flash Access Commands to Change the Pin control register as per bq34110 I2C note. ------- calibration end I wanted to check weather the new value is stored accurately or not, What sequence should I follow ? 2. What I learnt from TRM is that factory calibration is necessary to read voltage value, Do I need to set Pin control, Operation config A and design capacity etc before Board Offset, temp, voltage, current calibration? 3. Minimum which registers and parameters required to get at least voltage reading? If possible, please recommend page number of document where all these details are mentioned. Thanks in Advance. + diff --git a/data/text/DLP2/890598 b/data/text/DLP2/890598 new file mode 100644 index 0000000000000000000000000000000000000000..1870f1f81e50ebf5c560001c8a68e43654169c21 --- /dev/null +++ b/data/text/DLP2/890598 @@ -0,0 +1,20 @@ +BQ27441-G1: Average current and SOC measured by BQ27441 is not accurate + +Part Number: BQ27441-G1 Hi, I have a power section which is using BQ27441 as the fuel gauge to measure the status of a LiPo battery that has 4400 mAh capacity in total. The 4400 mAh capacity is achieved by connecting two identical 2200 mAh batteries in parallel. By the datasheet of the battery, the Maximum voltage is about 4.2V, the nominal voltage is 3.7V and the discharge cutoff voltage is 2.7V. The system parameters are listed below: Maximum charging current: 2.4A Maximum discharge current: 2A Minimum running voltage: 3.4V Maximum battery voltage: 4.2V Cutoff current: 160 mA the current sense resistor is 10 mOhm For this system we configured the following parameters in the fuel guage: BATTERY_CAPACITY = 4400 //4400 mAh battery will be connected TERMINATE_VOLTAGE = 3400 // 3400mV terminate voltage DESIGN_ENERGY = 16280 //16280 mWh design energy TAPER_RATE =275 FC set = 92% full charge set FC clear = 90% full charge clear TAPER_VOLTAGE =4160 Fortunately, the fuel gauge is measuring battery voltage and temperature at much better accuracy but it is not for average current and capacity. I am listing my issues and questions below: Issue 1: The current (Both Discharging and charging) measured by the fuel gauge was having an error of more than 8% (more than 200 mA), but after manually changing the CC gain from0.237 to 0.205 it is working properly now. but in the case of the remaining capacity and percentage of charge the there is a huge margin of error is there. Issue 2: The fuel gauge is showing 100 % of charge while charging even it is only at 3881 mAh and 0% before it is reaching the Terminate voltage (3.4V) Question1: I need to measure the capacity of the battery with much accuracy(less 1% error), what is the step for setting up the proper configuration for the fuel gauge to get the proper remaining capacity and percentage of charge? + +Hi Sanjin, I guess you should have received a report from the GPCCHEM. Could you share it with me? Thanks. Andy + +Hi Andy, Thank you for the reply. I am attaching the report with this mail please have a look4380.GPC_report.txt + +Hello Sajin, This is a ROM based gauge. There is no method to change the chemID. Are you able to upgrade to a bq27z561 flash based gauge that supports chemID programming? + +Hi kang, Thank you for your reply and sorry to say that we can't change the fuel gauge right now, we already manufactured some large quantities of boards. Is there any other way to optimize the SOC? + +By the datasheet, the total capacity of the battery is 4400 mAh, 16280 mWh and the cut off voltage is 2.7V and we are setting the same for the configuration of BQ27441, but for our design, we can't go up to 2.7V, we are stoping the discharge when the voltage reaches only 3.4V thereby we are not using the total 4400mAh or 16280 mWh. Will it be the cause for the issue? + +Hello Sajin, You will need to look at the Qpass register during the discharge. If it is not even 90% of the discharge vs. design capacity, I would recommend setting the terminate voltage to 3.4 volts if that's your system shutdown voltage. + +Hi Kang, We will test that thing that you have said about the Qpass register and update it with you. I have one more doubt is there, It is about the CC_GAIN. We had a current measurement accuracy issue previously and it was solved by altering the value in CC_GAIN register. But by going through the datasheet I got to know that CC_GAIN is no for customer usage and it is only for debugging purposes, so is that mean we can't alter the CC_GAIN value? Is it not the proper way to tackle the error in current sensing? If so what is the proper method? + +You can change CC_GAIN. It is not restricted to debugging only. About gauge accuracy: The gauge uses the built in ChemID to run discharge simulations. You must complete a successful learning cycle where the gauge can measure QMax and cell impedance. This requires accurate current measurements. A learning cycle is basically a series of controlled charge/relax/discharge/relax sequences. See /how-perform-successful-learning-cycle-gauges Once the gauge learned these properties, it will be as accurate as the built-in ChemID allows for the cell that you use. Make sure that you configure charge termination correctly (you use C/27.5 but a C/25 with a taper rate of 250 is more appropriate for your taper current - the guideline is 15% more current than your taper current to make sure that the gauge detects charge termination reliably). Also verify that the discharge/charge and quit current thresholds are compatible with your application. The gauge must be in the correct state (charge/discharge/relax) for this to work. + diff --git a/data/text/DLP2/890620 b/data/text/DLP2/890620 new file mode 100644 index 0000000000000000000000000000000000000000..2f62c362f4f3969dc75ef405a025d8b78b901b35 --- /dev/null +++ b/data/text/DLP2/890620 @@ -0,0 +1,6 @@ +[FAQ] Ambient Light Sensors: List of all FAQs + + + +Comparing Devices [FAQ] OPT3004: OPT3001 vs OPT3004, what is the difference? [FAQ] OPT3001: OPT3001 vs OPT3002 Optics [FAQ] OPT3001: OPT300X Family Parts: Industrial design of light sensor with cover glass/window opening [FAQ] OPT3001: What is the f1' value of the OPT3001? [FAQ] OPT3001: What is important and what are some key care-abouts when I design a light-sensitive user interface? Electrical [FAQ] OPT3001: Is there leakage on SDA and SCL if the pull-up supply is active and the power supply is not? Software [FAQ] OPT300X Family Parts: What are the available drivers for TI's family of ambient light sensors? [FAQ] OPT3001: Is there example raspberry pi code for the OPT3001? [FAQ] OPT3001: Do Linux/Android drivers exist for the OPT3001? [FAQ] OPT3001: Is there MSP430 code for use with the OPT3001? Mechanical/Assembly ALS OPT300x Handling Instructions [FAQ] OPT3001: Where is the STEP model (.STP) for the OPT3001? Performance/Accuracy [FAQ] OPT3001: What is the performance under flickering LED Light [FAQ] OPT3001: What is the accuracy of an OPT300x part? [FAQ] OPT3001: Why does the OPT3001 not have any data taken outside, under sunlight? [FAQ] OPT3001: Why does the OPT3001 not have a range that measures full sunlight at 130Klux? EVM [FAQ] OPT3001: Are the OPT3001EVM PCB files available? [FAQ] OPT3001: Debugging connection issues with the OPT3001EVM + diff --git a/data/text/DLP2/890626 b/data/text/DLP2/890626 new file mode 100644 index 0000000000000000000000000000000000000000..e2b3f0e435929b0d9d585c48d998440bca2181fc --- /dev/null +++ b/data/text/DLP2/890626 @@ -0,0 +1,6 @@ +[FAQ] BQ25606: Schematic Review and PCB Layout Design Tips + +Part Number: BQ25606 Please refer to the document below for Schematic Review and PCB Layout Design Tips for BQ25606. The selection of an external component can be either Required or Optional: Required - Absolutely required for proper operation Optional - Optional components Using this information, customer can reduce external components based on their application, as well as use this document to help in assisting with schematic reviews. + +BQ25606_SchematicChecklist V1p0.pdf Thank you very much, Ning. + diff --git a/data/text/DLP2/890672 b/data/text/DLP2/890672 new file mode 100644 index 0000000000000000000000000000000000000000..2647772c68c9f1452554e921934873f4fc9bb773 --- /dev/null +++ b/data/text/DLP2/890672 @@ -0,0 +1,16 @@ +BQ25713: Charger can’t charge continuously + +Part Number: BQ25713 Hi dear I am using BQ25713 in order to charge 4 cell battery with 5v USB power banks All default values of registers are fine to me. I just want to charge cells with 1.2 ampere and be able to charge again when adapter is removed and plugged again. I just set my desired current to 0x02 and 0x03 and charger starts to charge but after less than a second charger stops charging. Here are my questions: 1) i was not able to do previously described procedure with 5v USB power bank and i did it with power supply. Why is that ? As i understood charger had to set all offsets and initializes with respect to input voltage without help of host. So why it didn’t charge cells with 5v? 2) did i something wrong to charge with 1.2A ? And why charger stops charging fast + +When i put charge current at almost 100mA it works but for greater currents charger stops charging in less than a second + +Please take into account that i didn’t change any register after POR and just updated charge current register. I assumed that charger will update input voltage and current limit registers automatically when an adapter plugged vmax charge and vmin sys default values are ok to me. Is there a way to disable DPM mode that decrease charge current to give priority to system load. Because i think problem is related to this issue. But on the other hand i am testing IC at no load so there is no load to draw current from VSYS. I am completely confused Please help + +Hey Reza, We need a register dump the moment before and the moment after the charger stops charging. A waveform is also necessary, showing VBUS, IBUS, SW2, and VSRN. Regards, Joel H + +Dear Joel hi, thanks for reply unfortunately i am not able to check waveform and share with you but i have found out that when i write some values to charge current register BQ doesn't charge batteries but for some other values it starts charging but also in this way charging current is not same as i wrote it. which registers do you want to know before and after. just let me know thanks again best regards + +Hey reza, I would like to see all charger registers before an after. Regards, Joel H + +Hi! Check the watchdog timer in ChargeOption0 register (I2C address = 01/00h) - WDTMR_ADJ. The default setting stops charging after 175s without repeatedly sending the charge current. You can disable the watchdog by setting 00 for bits 6-5 - then the charging will not stop when you don't send the current register. Best, P + diff --git a/data/text/DLP2/890769 b/data/text/DLP2/890769 new file mode 100644 index 0000000000000000000000000000000000000000..3f6516fee0d43533febb49e9e12afaa8507410d9 --- /dev/null +++ b/data/text/DLP2/890769 @@ -0,0 +1,24 @@ +BQ24070: BQ24070: No charge termination status is activated and interference with step-up converter on payload side + +Part Number: BQ24070 Hello! 1. Please can you help me to check my schematic and understand BQ24070 behavior in charge termination mode? The problem is charge termination status is not activated for hours (checked for 10h at least) on fully charged battery or w/o battery connected. I didn't ever saw any other status than STAT1=ON and STAT2=OFF. Control resistors are adjusted to the values: Rdppm=37k, Rset=3.54k, Rtmr=50k. Voltage at ISET1 pin and battery charge current are goes to zero at the end of charge and Vbat is 4.21V if no load connected (as red cross on the drawing show). 2. When I add a payload with a step-up converter (U2 L6920D) I also faced with a sort of interference on BQ24070. I get a voltage drop about 0.4V at BQ24070 OUT pin at each step-up converter cycle (see the diagram below). In that case, I have a noise about 50mV at ISET1 pin and battery final voltage increase on 0.01V. And I have no idea how to handle with that voltage drops caused by step-up converter. Please give me a guess. Best regards, Dmitry + +Hi Dmitry, Just to get a better understanding of your problem, is the information you provided for when ISET2 and MODE are HIGH or LOW? + +Hi Anthony, thank you for reply! ISET2 and MODE are both HIGH for my setup. Best regards, Dmitry + +Hello, WHat is the state of MOde and ISET2? + +Hi Raheem, thank you for reply! ISET2 and MODE are both HIGH for my setup. Best regards, Dmitry + +Hi Dmitry, Just to check that the device is operating correctly, as I don't think I see any problems with your schematic, does the device show proper current when in fast charge mode (for instance when the battery is a 3.5V)? + +Hi Anthony, yes it is. I have discharge my battery down to 3.4V, switch on DC supply, and check battery charge current. It was constant 0.3A as it should be for my Rset value, till ~4V at the battery. I left my setup switched on during the night and have found at the next morning both status LEDs are off, so finally charging was stopped by timer for the first time. But I still had a small charging current about 1mA at my battery and voltage was about 4.3V. Then I made just an off-on cycle at DC supply and have got STAT1=ON signal again for a whole day as usual. But charge current is zero now. It looks like completely broken logic, but I can't understand why. I'm continue some more experiments... Best regards, Dmitry + +Dmitry, Would you be able to monitor the voltage TMR pin and see how that is operating as the current drops below 30mA (calculated termination current)? Do you also see the same behavior with higher RSET values? + +Anthony, I repeated a charge cycle today (but disconnected a payload from BQ24070 now, pure charger). Voltage at TMR pin was 2.51V from the beginning of current regulation phase till Vbat rised about 4.1V and then it began to drop down to 722mV on fully charged battery. V_TMR was 725mV when charge current dropped below 30mA. In this cycle STAT1 signal stalled again, I waited 12 hours and it still show charging, but charge current is zero now. I will increase charge current from 0.3A to 0.6A tomorrow and test it again. UPDATE: I have increased charge current twice to 0.6A - absolutely the same voltage at TMR pin as I described above. STAT1 signal went OFF after 10 hours indicating charge time is out. Charge current is zero. No indication of finished charge by STAT2. Best Regards, Dmitry + +Hello, Can you swap out the battery and use a sourcemeter instead on BAT pin WHat voltage do you measure on ISET1 pin when the battery voltage is around 4.2V? Also, can you try removing the C4 capacitor and see if that makes a difference? From the schematic, can you have the LEDs be pulled up to OUT instead of IN + +Hello, Raheem! Can you swap out the battery and use a sourcemeter instead on BAT pin Sorry, I don't have this type of tool. But I checked charge cycle with two different batteries: 1000mAh flat LiPo protected cell and 18650 2200mAh unprotected NCM cell. In both cases BQ behaves absolutely same. WHat voltage do you measure on ISET1 pin when the battery voltage is around 4.2V? 0V (zero) Also, can you try removing the C4 capacitor and see if that makes a difference? No difference. From the schematic, can you have the LEDs be pulled up to OUT instead of IN I just performed this modification: nothing changed. Best regards, Dmitry + diff --git a/data/text/DLP2/891022 b/data/text/DLP2/891022 new file mode 100644 index 0000000000000000000000000000000000000000..90de3a03e9c30f4b7a043a8e8cee784782ca2b56 --- /dev/null +++ b/data/text/DLP2/891022 @@ -0,0 +1,24 @@ +BQ20Z655-R1: Voltage Error + +Part Number: BQ20Z655-R1 Customer is bringing up 4S1P battery pack design using BQ20Z655-R1. They are seeing the voltage reading on each of the 4 cells droop in software (BQ Evaluation Software). Each cell is at 3.43V (all within 5mV). When they do a software reset (Manuf Access Code 0x41), then SW will read the appropriate voltage, but quickly droop to something like 2V on an exponential decay. Even when overriding FETs to allow 1A charge, they still see the individual cell voltages drop after a reset. They confirmed cell measurements (and at input to IC) are all consistent with 3.43V (under rest) and >3.5V charging. Customer is using BQ20Z655-R1 on 3S1P pack and it works fine. To note, they have not written the GG file yet, but am working on that now. Any guidance you can provide would be greatly appreciated! Regards, Mark + +Hi Mark, Did the customer use an EVM? Did they do the calibration? Andy + +Hi Andy, Apparently EVMs are no longer available. That was our first thought. What’s the easiest method for doing the calibration? Regards, Mark + +Hi Mark, See Section 9 of the bq20z655EVM User's Guide. Andy + +Thanks Andy! + +Hi Andy, The customer tried calibrating albeit with cells attached and monitoring the overall voltage (each cell is pretty tightly balanced). And immediately after calibration, voltages seemed okay, but again drifted apart. I’m curious how calibration might resolve the voltage decay issue. What else should we try? BQ20Z655EVM is EOL. Please advise. Thanks, Mark + +Hello Mark, Can the customer send a log file of the voltage drift after calibration? + +Hi Kang, Attached is the log from immediately after calibrating. Regards, Mark voltage testing.log + +Hi Mark, I would suggest your customer try a resistor cell simulator instead of battery cells and see if the same issue still occurs. See the screenshot below. Andy + +Hi Andy, Sorry for the delay in responding. The customer tested using 10K resistors, but guessing that shouldn’t matter. What else can they try? Do you notice anything unusual in the logs? Regards, Mark + +I also checked the log file. Besides the voltages that drop, there isn't anything in the log that sticks out. But yes, these voltages are troublesome. Is that just on one board or is that a problem with several boards/gauges? + diff --git a/data/text/DLP2/891226 b/data/text/DLP2/891226 new file mode 100644 index 0000000000000000000000000000000000000000..21cc07a31da95e82f463c06431105f1634efbe52 --- /dev/null +++ b/data/text/DLP2/891226 @@ -0,0 +1,8 @@ +BQ24773: BATPRES PIN connection + +Part Number: BQ24773 Hi team, According to the datasheet, the PIN 15 of BQ24773 "BATPRES" is input signal PIN, but in the EVM I've found it seems to be output PIN. If customer want to connect this pin to the MCU to indicate whether if the battery is present, how should they do? Thanks. + +Hello James, The /BATPRES signal on BQ2477x is always an input signal. The reason that it behaves like an output signal on the EVM is because there is an external comparator (U2) that generates a /BATPRES signal from the battery voltage. If the battery pack your customer is using does not have a signal that can be connected to the MCU for this purpose, then an external comparator such as used on the EVM can be used. Note that the BQ2477x also has an independent comparator that can be used to detect battery presence as well. You can refer to the BQ24780s EVM for an example of how the independent comparator can be used instead of an external comparator, saving cost and board space. (BQ24780s EVM has an external comparator as well, but there are jumper options to select between using the external comparator or independent comparator for /BATPRES) Regards, Steve + +Hi Steve, Thanks for the comments. I have more questions as below: 1. Is PIN 15 BATPRES the only way to detect if battery present in BQ24773? could we just read one of the register and get this information? 2. Could we left BATPRES PIN open, not connecting to anything? Would this has any risk? Please let me know if you have any ideas, thanks! + diff --git a/data/text/DLP2/891261 b/data/text/DLP2/891261 new file mode 100644 index 0000000000000000000000000000000000000000..9f54401f71c88000bc0ceba196ecd38a78b07545 --- /dev/null +++ b/data/text/DLP2/891261 @@ -0,0 +1,10 @@ +TL494: Frequency configuration + +Part Number: TL494 Hi Referring 9.3.2 Oscillator, the equation is f = 1/(RT x CT) but TYP frequency is 10kHz at CT = 0.01uF, RT = 12k ohm in the 7.6 Electrical Characteristics, Oscillator Section. Could you kindly advise how customer should consider the frequency configuration ? Thank you and best regards, Michiaki + +Hello Michiaki, This is some anomaly in the datasheet that goes all through revisions from Rev A to the present Rev H. Please use the curves in Figure 1 or the equation 3 in the datasheet to calculate the oscillator frequency. Thank you for pointing out this anomaly and I will try to find out why the test circuit uses a 12k resistor for Rt instead of a 10k. Regards John + +Hi John, > I will try to find out why the test circuit uses a 12k resistor for Rt instead of a 10k. Regarding on the above, could you kindly update latest situation ? Thank you and best regards, Michiaki + +Hello Michiaki, I will let you know when I have an update Regards John + diff --git a/data/text/DLP2/891457 b/data/text/DLP2/891457 new file mode 100644 index 0000000000000000000000000000000000000000..8ab0a138038f0b5be8f5b688e3ff4b34d7d7396f --- /dev/null +++ b/data/text/DLP2/891457 @@ -0,0 +1,24 @@ +TPS62745: TPS62745 + +Part Number: TPS62745 Hello, We are facing similar situation. Vsel was connected to Vin (design error), powered by batteries higher than 6V and some devices are damaged. Would be possible to share the squematic internally and go deeper on the severity of this problem? Thanks in advance. BRs, + +Igor, It is probably difficult at this time. We can only recommend that teh abs max rating be observed. I will contact our design team about internal details. For sure it will require an NDA to share any details. + +Igor, These pins connect two to pieces of internal circuitry: 5V ESD clamp, and inputs of 5V CMOS logic gates running on an internal rail. The obvious mechanisms of damage that I can foresee from over-voltage on these pins include: · Damage to pin metallization or ESD clamp due to triggering of ESD cell. This could cause functional issues with the VSEL signaling, as well as other possible issues if reflowed metal shorts to nearby circuitry. This type of failure would be immediate when the overstress occurs. In my estimation the risk of this kind of failure is low if the pin voltage stays below 7V, since the nominal trigger point for the ESD clamp is above 11V. · Damage to the gate oxide of the ESD cell or the CMOS logic gates. This could cause functional issues with the VSEL signaling, as well as other possible issues if the high current flowing through the failed oxide loaded down the internal rail or caused reflowed metal shorts to nearby circuitry. This type of failure has increasing probability of occurring as the time of exposure to over-stress increases. The risk for this failure is also low if the pin voltage stays below 7V. Our model for this kind of failure mechanism predicts less than 1 failed unit per billion after 100k operating hours at the worst case temp of 150C as long as the voltage never exceeds 7V (including transients, ringing, etc). Of course, this assessment should not be taken as any kind of guarantee of results for the customer. I have considered the most apparent mechanisms of failure under this application’s conditions, but this kind of analysis isn’t foolproof. It’s possible that there could be another mechanism or issue that I have not caught, which is why we qualify and specify the components and circuits within a given range. That more rigorous process yielded the abs max specs that are being violated. + +Thanks for your complete and so deep reply John. It seems that our board don´t have to face many problems working below 7V (maximum 1 per billion). After your answer, we have tested today 200 boards, just connecting 6,3 V Lithium battery, and 28 units are damaged, so current consumption increases 10-100 times. After changing TPS62745 regulator it works fine returning to the normal current consumption. So, do you think there is another possible problem, maybe on our schematic? Or could be possible to be a batch problem on these regulator, I don´t think so, but do you have any information about it? Thanks in advance. + +Igor, There are no lot quality issues that I am aware of. + +Hello John, Thanks for your answer. So, if we are working under any probed specifications, there is no explanation for having to replace your regulators on some of our devices in order to work properly. If you are able we can share our schematic with you, maybe there is something wrong that we cannot detect. BRs, + +Igor, if you post your schematic, I will review it. + +Hello John, Attached you can find schematic referred to TPS62745. Where D1, D2 and T4 are not mounted. So J2-battery power go directly to R2 0 ohm. 6V lithium battery is connected to J2 in normal activity (initially 6,5 V). In parallel 3V3 are applied to Vout from TC1 connector when device is programming. Sometimes could be 3,4 - 3,5 V. Can you see any issue on that schematic? Thanks in advance. BRs, + +Igor, If you apply an external 3.3 V to the output of the TPS62745, and the battery is not connected the high side body diode can conduct and you may possibly have enough voltage at the input to allow the device to start switching. Can you check it in that condition? + +Hello John, I have checked what you said and there are 0,25 V on the high side body diode along the range of 2-4V applied externally on Vout / SW pins. So, in normal situation, when we apply external 3,3 V at the V output we have 3,05 V at Vin pin. If we apply external 3,4 --> 3,15 V at Vin If we apply external 3,5 --> 3,25 V at Vin So, it could be a problem to damage the chip? Thanks BRs, Igor + +Igor, Do you see any switching activity on the SW pin? Is EN tied low? + diff --git a/data/text/DLP2/891745 b/data/text/DLP2/891745 new file mode 100644 index 0000000000000000000000000000000000000000..4ea97ffc9be746d782edd8a761cafade553b5663 --- /dev/null +++ b/data/text/DLP2/891745 @@ -0,0 +1,6 @@ +[FAQ] Do you have any guidance as to how I should choose my PoE PD IC? + +Do you have any guidance as to how I should choose my PoE PD IC? + +Great question! Please see the below flowchart that provides general guidance as to how to choose one of TI's PoE PD ICs: Best Regards, Brett Colteaux PoE Product Marketing Engineer + diff --git a/data/text/DLP2/892345 b/data/text/DLP2/892345 new file mode 100644 index 0000000000000000000000000000000000000000..21ed2f8c3879d22ecc156eb76f275ded860dfe33 --- /dev/null +++ b/data/text/DLP2/892345 @@ -0,0 +1,24 @@ +LM5066IEVM-626: UVLO Gate Masking Behaviour + +Part Number: LM5066IEVM-626 Hi, We seem to be experiencing some unexpected behaviour with the above part: We have tied UVLO/EN to GND to ensure the mosfet defaults off when the device is powered up. In order to turn on the mosfet, we are gate masking the UVLO which works as expected. However, we are now seeing that the OC/OP protection is not latching off. We do not believe the culprit is !RETRY since we have it tied to VCC and the device is configured to use pin cfg for RETRY. Mosfet switches off when there is a short or OC, but immediately turns back on when short or load is removed. Can anyone explain this behaviour? Is the masking of UVLO and connecting it to GND causing faults to be unintentionally reset and the mosfet switched back on? Daniel + +Hi Daniel, Thanks for reaching out! I will go through the above one and get back early next week. Hope this is fine for you. Best Regards, Rakesh + +Hi Daniel, Masking the GATE for any fault event will reset the GATE. It should be avoided in normal operation. Caution: Enabling gate masking may result in pass FET damage during fault conditions. Gate masking should only be used during system debugging. Let us know if there are any followup questions. Best Regards, Rakesh + +Hi Rakesh, Just to confirm what you mean: By masking the GATE for any fault event - will this reset the gate repeatedly or only once when masked? The reason I ask is because we are experiencing some undocumented behaviour. By keeping UVLO tied low and gate masking the fault, the LM5066I repeatedly retries to turn on the mosfet after 1 timer timeout (20ms period on the EVAL board). This leads to what I said earlier - any fault condition is not latched (i.e. OC or OP). A completely different set of behaviour is experienced when using the OLVO fault to ensure the mosfet is off at power up, by connecting OVLO to Vcc. In this case, when the OVLO fault is masked, OC and OP faults thereafter are in fact latched and the mosfet is not repeatedly turned on. I have attached scope traces showing the gate and timer pin behaviour for both cases during a short circuit. Can you explain to me why there is a difference in behaviour between masking UVLO and OVLO, and why when masking the UVLO fault, it repeatedly resets all faults and prevents latching? Kind Regards Daniel UVLO Gate Masked (and tied low), Retries set to 0: UVLO Gate Masked (and tied low), Retries set to Infinite: OVLO Gate Masked (and tied high), Retries set to 0: + +Hi Daniel, This is not the common use case in general. Can you help us understand the purpose of GATE masking in your system. This would help our designers to analyze the issue as we don't have much validation details for this rare use case. Best Regards, Rakesh + +Hi Rakesh, We are trying to ensure that the mosfet is off at power up. To do so we tie UVLO low, then when configuring the LM5066I, the UVLO fault can be gate masked and the rest of the hotswap functionality is as expected. But by doing it this way we lose the latching functionality of the OC and OP faults. An alternative method is to tie OVLO high and gate mask it. This does not prevent the OC and OP fault from latching and the hotswap controller functions as expected. Is this the best way to achieve our requirement of ensuring the mosfet is off at power up? Can you recommend another method? Kind Regards Daniel + +Hi Daniel, One way is to pull the UVLO/EN pin LOW as shown in Figure-16 in the datasheet The other method is to issue OPERATION command 00h immediately after powerup (before the insertion time expires, refer Figure 13) to keep the system in disable state. These two are widely used and proven methods. Best Regards, Rakesh + +Hi Daniel, Do you have any followup questions.? Best Regards, Rakesh + +Hi Rakesh, Background: I can provide a bit more background. We are using the LM5066 to provide soft-start, short circuit protection, & diagnostic functionality on several power outputs (16 outputs). As Daniel mentioned we want these outputs to be off on startup. Hence artificially causing a lockout with UVLO/EN then masking the error once we have software control. An additional complication is these LM5066 are on different electrically isolated sections. I2C control is very convenient as it only requires 2 signals to cross isolation. Finally we are using the dV/dT startup configuration to allow large capacitance to be turned ON but with a fast fault timer in case of problems (Fault = 0.5ms) Problem: The fault mask register provides the ability to mask individual errors. Table 33 list all the errors which can be individually masked. It has undocumented effect on the UVLO/EN pin, this pin affects ALL faults including the overcurrent AND circuit breaker faults. Internally it appears to clear the fault in a way that makes the system detect an EN toggle (which clears all faults). e.g the mask affects both UVLO and EN part of the UVLO/EN signal internally. OVLO fault masking appears to work more as intended and only affects itself. Keeping MOSFET OFF at TurnON Optionscompany Suggestion: One way is to pull the UVLO/EN pin LOW as shown in Figure-16 in the datasheet Our Comment: We are doing that by keeping UVLO tied low. Unfortunately we cannot release it as per figure 16 since that would require an additional signal to cross electrical isolation, for each LM5066. (we are using 16).company Suggestion:The other method is to issue OPERATION command 00h immediately after powerup. Our Comment: Good idea, we did not consider this. Timing constraints will very tight as our 10nF timer capacitor would give us about 7.8ms startup time. Realistically i dont think we can guarantee having communicated to all LM5066 with-in that time 7ms. Follow Up Question: 1. Would you be in a position to confirm the exact behaviour of the UVLO/EN mask and how it affects all other faults? 2. With UVLO masked it appears to clear ALL faults either every ~100ms or ~20ms depending on the retry setting(retry, or not) but we have been unable to relate either time to the timer capacitor setting. Is it a hard-coded internal retry period? 3. Able to confirm this issue is confined to the UVLO/EN fault and that OVLO will work as documented? + +Hi Daniel, John, I understood the challenges in using the UVLO/EN pin for control or the OPERATION command 00h in your system. I need to verify the behavior and discuss with our design team to find the root-cause. Please allow some time. Best Regards, Rakesh + +Hi Daniel, John, I am yet to visit lab for bench verification. How critical is it at your end ? Have you explored any alternate ways to realize this function at your system level ? I just want to inform you that I can make some progress in the next week. Best Regards, Rakesh + diff --git a/data/text/DLP2/892352 b/data/text/DLP2/892352 new file mode 100644 index 0000000000000000000000000000000000000000..23522f6b4c119e718d8f5eb8b7f23ea10db0b4d4 --- /dev/null +++ b/data/text/DLP2/892352 @@ -0,0 +1,12 @@ +TPS23755: start current of TPS23755 + +Part Number: TPS23755 Hi team, we want to check how much the startup current? I find that TPS23755 use advance startup, and integrate the current source. + +Hello Betty, The EVM has a startup waveform that shows the input current on page 6: That will include the current used in advanced startup. If this post answers your question, please indicate so by marking this thread as resolved. Thank you. Regards, Michael P. Applications Engineer customer organization + +hi Michael, I sitll not clear about the startup current. In the page 6, the Iin is the startup current,right? And, why it have a step and then spike? The startup current is less than 50mA? + +Betty, The current shown in page 6 is the input current for the board. This will include the current in the startup circuit. Or, are you needing the specific current associated with the internal current source? If so, why is that number needed versus the overall input current required? The large current spike is inrush, which is limited by the IC. If this post answers your question, please indicate so by marking this thread as resolved. Thank you. Regards, Michael P. Applications Engineer customer organization + +Hello, This thread has been inactive for many weeks now. I am going to close it, but feel free to reopen it or start a new thread. Thank you. Regards, Michael Pahl + diff --git a/data/text/DLP2/892440 b/data/text/DLP2/892440 new file mode 100644 index 0000000000000000000000000000000000000000..78db1b770e57eb4b0a6565a38fbb31c43d24ba59 --- /dev/null +++ b/data/text/DLP2/892440 @@ -0,0 +1,118 @@ +BQ35100: Flash stream file parsing fails on a comapare, resulting in bricked bq35100 chip + +Part Number: BQ35100 Hello, We have implemented flash stream parser based on the code described in slua801. we tested the parser and it parses the flash stream file as per specifications (flash stream specification file attached1856.Flash Stream File Format.pdf). During our tests with the bq35100 device we found that firmware revision that was read and compared against a known value was failing. When using bqstudio reading of ID and version was working correctly. In order to do the same with flash streamer file to read id and fimware version, we had to add 100ms delay after i2cwrite command (see below routine). char *BQ35100_execute_fs(char *pFS) +{ + int nLength = strlen(pFS); + int nDataLength; + char pBuf[16]; + char pData[32]; + int n, m; + char *pEnd = NULL; + char *pErr; + bool bWriteCmd = false; + bool bReadCmd = false; + bool bCompareCmd = false; + unsigned char nRegister; + + m = 0; + for (n = 0; n < nLength; n++) + if (pFS[n] != ' ') pFS[m++] = pFS[n]; + pEnd = pFS + m; + pEnd[0] = 0; + + do + { + switch (*pFS) + { + case ';': + break; + case 'W': + case 'C': + case 'R': + bWriteCmd = *pFS == 'W'; + bReadCmd = *pFS == 'R'; + bCompareCmd = *pFS == 'C'; + pFS++; + if ((*pFS) != ':') goto exit_parse; + pFS++; + n = 0; + while ((pEnd - pFS > 2) && (n < sizeof(pData) + 2) &&(*pFS != '\n')) + { + pBuf[0] = *(pFS++); + pBuf[1] = *(pFS++); + pBuf[2] = 0; + m = strtoul(pBuf, &pErr, 16); + if (*pErr) return (pFS - 2); + if (n == 0) deviceAddress = m; + if (n == 1) nRegister = m; + if (n > 1) pData[n - 2] = m; + n++; + } + if (n < 3) goto exit_parse; + nDataLength = n - 2; + if (bWriteCmd) + { + BQ35100_dump_data("Write", nRegister, pData, nDataLength); + i2cWriteBytes(nRegister, (uint8_t *)pData, nDataLength); + /* Adding a delay giving bq35100 device sometime to put register value on I2C bus before we read it. */ + DelayMs(100); + } + + if (bCompareCmd || bReadCmd) + { + char pDataFromGauge[nDataLength]; + i2cReadBytes(nRegister, (uint8_t *)pDataFromGauge, nDataLength); + if (bCompareCmd) + { + BQ35100_dump_data("Read", nRegister, pDataFromGauge, nDataLength); + BQ35100_dump_data("Compare", nRegister, pData, nDataLength); + if (memcmp(pData, pDataFromGauge, nDataLength)) + { + DEBUG_PRINTF("%s: Memory comparison action failed, exiting...\r\n", __func__); + goto exit_parse; + } + } + else + BQ35100_dump_data("Read", nRegister, pDataFromGauge, nDataLength); + } + break; + case 'X': + pFS++; + if ((*pFS) != ':') goto exit_parse; + pFS++; + n = 0; + while ((pFS != pEnd) && (*pFS != '\n') &&(n /lit/an/spra953c/spra953c.pdf As specified in the datasheet, –40°C to 125°C is the Junction temperature range. If this post answers your question, please indicate so by marking this thread as resolved. Thank you. Regards, Michael P. Applications Engineer customer organization + +Michael, I understand how to calculate Tj using thermal resistance. Is it diffcult to know TPS23758 power consumption becasue of internal MOS ? Thanks Hector + +Hello Hector, The power consumption of the IC is discussed in this other post. Since they already discuss it, I just attach the link: /support/power-management/f/196/t/820034?TPS23755-TPS23755-IC-Power-Dissipation-Calculation The calculation includes an assumption about the power loss through the internal FET gate because the direct gate capacitance cannot be measured. However, we can estimate the power loss through there because all the power for the gate is coming from VCC so that is how we calculate it. If this post answers your question, please indicate so by marking this thread as resolved. Thank you. Regards, Michael P. Applications Engineer customer organization + +Hi Michael, The calculation shown in /support/power-management/f/196/t/820034?TPS23755-TPS23755-IC-Power-Dissipation-Calculation The power dissipated by the IC will be the power at the pass FET (IRTN*IRTN*RDSon) and the power to drive the gate of the switching FET (VCC*ICC) and conduction loss of the switching FET (RDSonFET*Irms*Irms). Can we ignore switching loss of the switching FET ? + +Hello Hector, Yes that is correct. If this post answers your question, please indicate so by marking this thread as resolved. Thank you. Regards, Michael P. Applications Engineer customer organization + +Hi Michael, Here is current measurment of the switching MOS in TPS23758. Calculated conduction loss of the MOS is 0.08W. Total power loss of TPS23758 would be too low to match case temperture measurment on TPS23758 itself. Why can we ignore switching loss of the switching MOS ? Thanks. + +Hello Hector, The switching loss is estimated by the power to drive the gate of the switching FET (VCC*ICC). The traditional way to calculate the switching loss is not possible with the FET internal to the part. If this post answers your question, please indicate so by marking this thread as resolved. Thank you. Regards, Michael P. Applications Engineer customer organization + diff --git a/data/text/DLP2/893179 b/data/text/DLP2/893179 new file mode 100644 index 0000000000000000000000000000000000000000..0714f7c0630ae201ee67d4d1bce5a687491e34d6 --- /dev/null +++ b/data/text/DLP2/893179 @@ -0,0 +1,24 @@ +LM5146-Q1: How to add over current protection for a particular current + +Part Number: LM5146-Q1 Hi TI, i am using a Buck converter using LM546-Q1 .I have design for 8 amp out, for 13.5V Input 30-60V input . i am using RDSon for current limit sense . But in the datasheet it is not clear how ILIM pin save the circut for overcurrent protection please explain. . The issue i am facing with surge current.it is working fine while i am incresing the current from 0-1-2-3---8 up to 8 amp but while i am suddenly add load the circut went to hiccup mode as like short circuit. Please let me know how to resolve the issue, Is the anyway i can limit the current for 10 amp max? if i will use ILIM pin for 10amp limit the current, curcuit not able to take surge current. Please provide some suggestion . + +Hi Dinesh, Unfortunately, I was not able to see the component values for the schematic that you have. You can check the component selection values with the calculator located at the bottom of this page /product/LM5146-Q1/toolssoftware Also the layout will play an important role in order to sense the current limit correctly. You can follow the layout guidelines here /lit/ds/symlink/lm5146-q1.pdf#page=48 Thanks -Arief + +Hi Arif, Please explain How ILIM pin works? also please let me know how to switch off the converter if someone tries to take more current ? for example i have design the converter for 8 amp if somone tries to take 10 amp i wants to switch off at that moment so please let me know your suggestion. do i need to add another opamp or use another technique. Thanks Dinesh + +Hello Arif, i am waiting for reply please explain . Best Regards, Dinesh Gread + +Hi, I think the explanation of the current limit is located here /lit/ds/symlink/lm5146-q1.pdf#page=23 I dont think the device will shutdown if the current limit is achieved. If you want the part to shutdown then you have to use maybe an external current sense amplifier and set it such that it will disable the part when the desired current is reached. Thanks -Arief + +Hi Dinesh, The LM5146-Q1 will enter hiccup mode if the current limit condition persists. Once the current limit is removed, normal operation resumes. Regards, Tim + +Hi Arif, will you please suggest any circuit which i can use for current limit. Best Regards, DInesh Gread + +Hi Dinesh, The inrush current is it due to charging to the output capacitor? If that is true then you can use a larger SS capacitor and slow down the rise time of the output such that the inrush current will not be too big and trigger the current limit Thanks -Arief + +Hi Arif, i have made this circuit for 8 amp out. i want this circuit to limit the current at 9-10amp more than that it shoud not provide. the short circuit condition is fine it enter in hiccup mode but i want that if i design this circuit for 8 amp it should not provide more that that . can you please suggest any circuit by use of that i can limit the current . Also please let me know how to reduse the no load current currently the circut works on 400Khz and take 40ma and it is just waste can you please let me know how to minimize it. i dont have control on EN pin i.e this circuit will not off any time but load can be off so that i wants to reduse the no load current also. please suggest + +Hicompany Team, i am waiting for your inputs . Best Regards, Dinesh Gread + +HI Dinesh, You can use diode emulation mode (with SYNCIN tied low) to reduce the no-load input current. In terms of overcurrent protection (OCP). the setpoint is typically defined using the ILIM resistor at 130-150% of nominal full load current. This is because the inductor current overshoots during load transients and may inadvertently trip OCP. Please fill out the LM5146-Q1 quickstart file and send to us for review. Also, the schematic values above are unreadable, so please forward a higher res version if possible PS: Your design seems similar to the LM5146-Q1 EVM with 12V/8A output. Regards, Tim + diff --git a/data/text/DLP2/893357 b/data/text/DLP2/893357 new file mode 100644 index 0000000000000000000000000000000000000000..f9a49419295008ae45d3ed8a249608ff3880f509 --- /dev/null +++ b/data/text/DLP2/893357 @@ -0,0 +1,24 @@ +BQ34Z100-G1: Stops taking OCV measurements after a time + +Part Number: BQ34Z100-G1 Hi, We have succesfully gone through a learning cycle and Update Status is 0x6. A few cycles after the learning cycle was complete, OCV readings stopped being taken and QMAX & DOD values stopped updating, with their respective counters just increasing above 100hrs even though we cycled the cells multiple times. My assumptions is that OCV readings should occur every time the fuel gauge enters relax? Interestingly when we reset the fuel guage and then do a few cycles OCV readings do occur for the first few times. Then they stop again. Why would this be happening? Is it normal behaviour? Will the fuel gauge decide to take readings after 200hrs or somthing? Thanks James + +Hello James, Can you show me the test using a bqStudio log file? + +Hi, It is very difficult as the fuel gauge is floating at high volts. I can give you all the register values if that helps? But I think it easiest first to answer my initial question, should the fuel gauge take OCV measurement and update DOD/QMax on every cycle? Or does it only do it every 10 cycles or something?. Thanks, James + +Hello James, OCV measurements are taken when the stack voltage reaches a dv/dt condition of < 1 uV/s. It does not do it via cycle count. + +Hi Kang, Ok, thanks. Any ideas why it would take a few OCV readings after a reset and then never take any more? Would it be helpful to do a charge to 100% then turn off the charger and begin the bqstudio log file? All it will show is no OCV measurement is ever taken. Or would you like the register values? We have a second unit programmed with the golden file from the 1st unit and it does the same thing. Thanks James + +Hello James, It depends on how stable the voltage is and whether or not IT is enabled. Yes, I think you should log a bqStudio file for us. I would like to look at the voltage and a few other debug registers such as DOD0. bqStudio logs all these by default. + +Hi Kang, I have attached the log file. I started it a few minutes after full charge was reached. It ran overnight and no DOD0 or Qmax updates were seen. Our system is 16 x 100Ah 3.2V LIFEPO4 cells in series I notice that the voltage fluctuates by one ADC sample which equals 16mV for our system (16 cells in series). This can't be the issue can it? Cheers James + +log after charge 4-14-20.zip + +Hi Kang, Do you need me to collect any more information? We are almost ready to release our product and this is holding us up. We would really appreciate some help Thanks James + +Hello James, Thank you for the log files. Can you send me the bqz file you are using in bqStudio? The default directory is C:\ti\BatteryManagementStudio\config\ We may need to open up a parameter for you to modify. If it is the default bqz, just let me know. + +2728.0100_0_16-bq34z100G1.zip + diff --git a/data/text/DLP2/893362 b/data/text/DLP2/893362 new file mode 100644 index 0000000000000000000000000000000000000000..935a3d4f1293f62ffa53290e032150399c367868 --- /dev/null +++ b/data/text/DLP2/893362 @@ -0,0 +1,12 @@ +TPSM53602: Environmental information + +Part Number: TPSM53602 Hi team, Could you kindly advise we could provide the material related environmental information ? (e.g RoHS, REACH, PFOS&PFOA etc…) In the website of material content search, we couldn’t see the information RoHS and REACH as below. Thank you and best regards, Michiaki + +Hi Michiaki, I have received a few E2E post about this recently. I have brought this up to the product compliance team and they have been looking into my request. I expect this to be processed and resolved several weeks from now since there are paperwork and an internal process flow to go through to get this approved and reflected on the product folder view you see there. Regards, Jimmy + +Hi Jimmy, Could you kindly share the latest situation of environmental information ? I would much appreciate when you will update the status on the website. Looking at the website but the status is not changed yet. Thank you and best regards, Michiaki + +Hi Michiaki, I am going to ping the assigned analyst for this request to see the status on it. Additionally, I will try to find any documentation that shows RoHS certification if that helps you in any way. Unfortunately with the current global situation we are in, it can take some time to get the request resolved. However, rest assured that I will continually push with a sense of urgency to resolve this request. Thank you for your patience. I will try to reply back by end of today if I get any additional information on the matter, Regards, Jimmy + +I was able to get information back from the product engineer. Attached is a material content report for the TPSM53602 power module. Let me know if you have any other questions about this device. I'll be closing this thread now. Regards, Jimmy (RoHS Material Content)_Disclosure_Report_TPSM53602RDAR_4_8_2020_10_31_21_PM (2).xlsx + diff --git a/data/text/DLP2/893399 b/data/text/DLP2/893399 new file mode 100644 index 0000000000000000000000000000000000000000..0e6f97cd8927c4cce136af627a8f05c7d7dea4da --- /dev/null +++ b/data/text/DLP2/893399 @@ -0,0 +1,6 @@ +[FAQ] UCC27712-Q1: Why should I replace 3-phase bridge drivers with half-bridge drivers in automotive AC compressor modules? + +Part Number: UCC27712-Q1 I am currently using 3-phase bridge drivers for the IGBTs of the inverter stage of a BLDC motor. Why should I consider a gate driver to replace the 3-phase bridge driver in my existing solution? What are some performance advantages of the half-bridge gate drivers over my current solution? + +Why should I replace 3-phase bridge drivers with half-bridge drivers in automotive AC compressor modules? High-voltage 3-phase BLDC motors are used to drive the AC compressor in high-voltage HEV/EV. HVAC compressors, which can require 10 kW of power, are second only to traction motors in terms of power consumption. Figure 1 shows a typical AC compressor module block diagram with IGBTs as the inverter stage to drive the 3-phase BLDC motor. An inverter stage consists of three pairs of high-side and low-side IGBTs configured in half-bridge topology. Figure 1: Block diagram of an automotive high voltage HVAC compressor module As shown in Figure 2, designers have the choice of using 3-phase bridge drivers IC’s to drive the IGBT’s of the inverter stage. However, because of their low drive strength of <500 mA, 3-phase bridge driver solutions typically require additional buffers to act as a current booster. This means additional components, which translates into additional cost, system PCB size increase and performance degradation (EMI risks and increased propagation delays) of the overall system as a result of parasitics from a non-ideal PCB layout. Figure 2: Driving the inverter stage with 3-phase gate drivers To help minimize switching losses from the IGBTs and reduce EMI for higher system efficiency, designers have the choice of using half-bridge gate drivers to drive each phase of the inverter stage instead. That is, the 3-phase bridge drivers depicted in Figure 2 are increasingly being replaced with half-bridge drivers such as UCC27712-Q1 as shown in Figure 3. Figure 3: Driving the inverter stage with three half-bridge gate drivers The following are the reasons for usingcompany half-bridge drivers to drive the IGBTs: From a gate driver standpoint, EMI is often associated with overshoot at the gate. The configuration shown in Figure 2 leads to complex PCB layout including long PCB traces from the 3-phase driver switch node pin to the IGBTs, which could cause more EMI challenges. UCC27712-Q1 based approach shown in Figure 3 allows removal of extra components, reduces the complexity of the PCB layout because the driver IC can be placed very close to the IGBTs while also confining the switch node to minimal area. All this leads to less challenges with EMI. Does not require external booster stage to amplify the gate drive current as the IC can achieve 1.8A/2.8-A source and sink current. Interlock and dead time functions protect half-bridges from shoot-through by preventing both outputs from being turned on simultaneously. Wide VDD range 22V offers sufficient margin to effectively drive the IGBTs. The IC is in a 6.0-mm x 4.9-mm package saving significant PCB area as opposed to 3-phase bridge drivers where the ICs often have bulky dimensions (17.9 mm x 10.3 mm in some cases). This smaller size and reduced number of ICs and associated passives components leads to smaller PCB area needed for the circuits to drive IGBTs. Table 1 below highlights some of the key performance advantages of the UCC27712-Q1 half-bridge gate driver over some 3-phase bridge drivers. UCC27712-Q1 Common 3-phase bridge drivers Peak output current (A) >1 <0.5 Rise time (ns) <20 >100 Fall time (ns) <20 >50 Prop delay (ns) <110 >500 Iq (uA) <300 >2500 Operating temperature range (C) Down to -65C Limited to -55C Abs max Package group SOIC | 8 SOIC | 28 Table 1: Performance advantages of the UCC27712-Q1 References: For further information on gate drivers, please see /gatedrivers. Review the automotive HVAC compressor module interactive system block diagram See the automotive high-voltage, high-power motor drive reference design Learn more about the UCC27712-Q1 + diff --git a/data/text/DLP2/893414 b/data/text/DLP2/893414 new file mode 100644 index 0000000000000000000000000000000000000000..3d55f922e150b44f06d5ab729638200120867e7b --- /dev/null +++ b/data/text/DLP2/893414 @@ -0,0 +1,12 @@ +TPS92640: start up issue with low analog dimming + +Part Number: TPS92640 Hello experts, I got question about start up with low analog dimming from customer. My customer can't start up well when they set low analog dimming. In datasheet P14, I found the discription related with proper start up as below; Vcs should be greater than 10mV. Also, in equation (4), Vcs is defines as Viadj/10. Is this possible to be related with low analog dimming? I'm sorry I'm not clear about relation between Vcs and low analog dimming. I would appreciate if you would give me advice. Thanks and best regards, Ryo Akashi + +Hello Ryo, Have they implemented the offset resistor as described in the datasheet? What are the steps they are taking and when does the issue arise? Are they dimming down via Iadj until the LEDs extinguish? Best Regards, + +Hello Ryo, I haven’t heard back from you, I’m assuming you were able to resolve your issue. If not, just post a reply below (or create a new thread if the thread has locked due to time-out) Best Regards, + +Hello Irwin-san, I'm sorry for my late reply. I am confirming with customer, let me ask later. Sorry for making you wait. Thanks and best regards, Ryo Akashi + +Hello Ryo, I'm going to close this since we are working on this issue via email. Best Regards, + diff --git a/data/text/DLP2/893589 b/data/text/DLP2/893589 new file mode 100644 index 0000000000000000000000000000000000000000..6260d6c1e24ebcfef8c782ed9888aa2dcdbb75b3 --- /dev/null +++ b/data/text/DLP2/893589 @@ -0,0 +1,24 @@ +BQ34Z100-G1: updating calibration data after learning + +Part Number: BQ34Z100-G1 Hi, I have been doing 10 golden images for different batteries we can use in our products. All batteries are LiFePO4 batteries from the same manufacturer, 5 of them are 4SNP (12.8V nominal voltage) and the 5 other are 8SNP (25.6V nominal voltage) otherwise only the capacity is changing (from 27Ah to 96Ah). I thus have all the gg.csv files exported after the learning cycle that I used to generate the golden images files. However I now realize that the calibration data I used for these learning cycles were not optimum and I would like to modify them to increase precision. As you can guess performing again these 10 learning cycles is not an option Is it possible to modify (slightly, let say +/-5%) the calibration values in the gg.csv file before exporting again the golden image files? What could be the drawbacks of this method? Looking forward to your insights. Best regards, Jeremie + +Hi Jeremie, There's no harm in modifying the calibration after learning cycle +/-5%, since the gauge will continue learning in the field and can adjust the learned resistance with previous calibration value by up to 15% during one discharge cycle. + +Hi Damian, Great! Thank you for your quick answer on that topic. Best regards, Jérémie + +Hi Damian, I am realizing all the possibilities my end application has to get data from the gauge, either from the golden image flash stream or from the gauge itself. I could configure my battery charger directly from these data instead of using separate parameters in my host microcontroller. However I would have to modify additional parameters in the gg.csv after learning, such as Configuration>Data>Cell Charge Voltages, Configuration>Data>Charge Currents, Configuration>Data>JEITA Temperatures... Basically could you indicate which parameters are safe to modify after learning and which should remain unchanged? Best regards, Jérémie + +Hello Jeremie, You can always configure the gauge features to match your application after the learning cycle. The learning cycle is related to the battery cell properties. As long as you don't change the battery chemistry that was used for the learning cycle, you're ok configuring the gauging features and tweaking parameters after the learning cycle. + +Hi Damian, Thank you for your quick answer. More than the chem ID, I bet the Ra tables should not be tinkered with either, are you sure there is no other register that should be preserved? (e.g. end of charge taper conditions) I want to make sure I won't jeopardize my learning. Best regards, Jérémie + +Hi Jeremie, That's correct. The Ra and Qmax is part of the chem ID and what are learned during the learning cycle. + +Hi Damian, Thank you for this clarification. I read that as part of the golden image generation process it was advisable to average the calibration values over several boards (This i why I started asking about calibration modification after learning). Following the same reasoning, is it safe (or even advisable as well) to average Ra tables and Qmax values over several learning cycles of different production grade batteries ? Looking forward on your insight. Best regards, Jérémie + +Hi Jeremie, user5014632 Following the same reasoning, is it safe (or even advisable as well) to average Ra tables and Qmax values over several learning cycles of different production grade batteries ? No you don't have to average Ra or Qmax because it's learned and updated in the field. The recommendation is to run an optimization cycle once you have your prototype build, if you want to do due diligence. + +Hi Damian, Since these values are learned and updated in the field I am wondering whether the learning cycle is really necessary. Actually I do have access to the real capacity (Qmax) of my batteries, and I notice that across different number of series cell and capacities the Ra tables are pretty similar (see below) Would it be possible in that context (same battery manufacturer, same cell model) to "build" a golden image by setting the Ra table, Ra flag and Qmax in the gg.csv file without performing a learning cycle? Best regards, Jérémie + +Jeremie, I would recommend doing a learning cycle one of the cell first then you can fan it out appropriately to other cell configurations. The reason for this even though learning is done in the field it's filtered/limited. The resistance isn't allowed to change more that 15% per discharge cycle whereas learning cycle is unfiltered and without the restrictions. + diff --git a/data/text/DLP2/893724 b/data/text/DLP2/893724 new file mode 100644 index 0000000000000000000000000000000000000000..c8423cb3c53946e29029a4870d7d36da0a4e8878 --- /dev/null +++ b/data/text/DLP2/893724 @@ -0,0 +1,14 @@ +BQ27510-G3: Low Current Application + +Part Number: BQ27510-G3 A product that I am working on is using the BQ27510-G3. It has been observed that the fuel gauge has reported incorrectly in the following instance. When testing the device's battery life in shelf mode, the device did not report a linear discharge, which was expected. The reported discharge was closer to an exponential trend line. Current draw while in shelf mode is in the range of 50 - 100 uA. The biggest difference observed between expected and actual SoC was roughly 20%. It seems that the BQ27510 relies on open circuit voltage (OCV) measurements when the current is low. Is it possible that there is something in the implementation of the BQ27510 that would cause the OCV measurements to be off? + +Do both filtered and unfiltered RM and both smoothed SOC and true SOC change unexpectedly or only the filtered/smoothed values? + +The SOC value I was referring to is shown below. RM was not being used. The SOC value appears to not be smoothed. See below the data returned from a read of OpConfig D register. b + +Hello Andrew, Can you provide a bqStudio log file and your gg.csv file at the beginning of the test? What do you mean the SOC is not being smoothed? + +There is no log file for the test because the test was ran on a fully assembled device to determine the shelf mode battery life. I have attached the gg.csv file. Regarding the SOC not being smoothed, the previous reply shows 00 at register 5E. This seems to show that bit6 (SMTHEN) is low, meaning that the SOC value is not being smoothed/filtered. See picture below taken from SLUUA97. 2337.0510_4_00-bq27510G3.gg.csv + +In order to further debug, is it possible to take the battery out and put it on EV2400 + bqStudio to get a log file to look at RSOC performance? + diff --git a/data/text/DLP2/893860 b/data/text/DLP2/893860 new file mode 100644 index 0000000000000000000000000000000000000000..f8dba4d4ae6478c5888c8d6e9e173e13d4887b57 --- /dev/null +++ b/data/text/DLP2/893860 @@ -0,0 +1,24 @@ +BQ27750: Question regarding remaining energy in cWh + +Part Number: BQ27750 Hello, in our device we're using a LiPo battery pack with BQ27750 fuelgauge chip. We want to use the remaining energy in cWh and a constant power consumption value to calculate and display the remaining runtime of our device. In several logs of discharging our device we were facing a non-linearity of the remaining energy value after about 100 minutes of device runtime. Attached you will find a typical log file where you can see in column "Z" the remaining energy in cWh which is descending from line to line in a linear way. In line 83 you can see that the remaining energy value jumps from 558 to 570 cWh without any change of the load. This behavior is the same in all log files and for different battery packs + devices and leads to an increase of remaining runtime of about 15 minutes which will be displayed during discharge process. We want to understand why the the remaining energy is jumping all the time after more or less the same device runtime (after about 100 minutes) and if there is a way to prevent this jumps. Thanks in advance! Best regards, Marcel fuelgauge_COM14_20200325.csv + +Can you also provide your gg file? Thanks. + +Hi Andy, you will find the corresponding gg-File attached. Thanks and best regards, Marcel BQ27750_gg-File_clean.gg.csv + +Hi Marcel, I have checked your log file and it doesn't seem like a bqStudio log. I would need your help to provide a bqStudio file so that I can see much more detailed information. Also, make sure you set the log interval to 3 or 4 seconds. Andy + +Hi Andy, first of all sorry for my late reply - I was on vacation in the meanwhile. You're right that it's not a log file which was written from bqStudio. The log file was directly written by a script which operates with our device. That's also the reason why I can't provide you a bqStudio log, because we need to discharge the battery pack in our device. I cannot reproduce exactly the same load for the battery pack when logging with bqStudio. But you can find all relevant registers from BQ27750 chip in the given log file. Best regards, Marcel + +Hi Marcel, The bq27750 has a lot of run-time information. Without sufficient data, it is almost impossible for me to tell you the cause. That's why I require a bqStudio log file. Andy + +Hi Andy, I'm currently trying a test setup where the battery pack I2C terminals are connected to bqStudio which is logging every 3000ms. The plus/minus terminals are connected to our device for discharging the battery pack. The only problem is that our device now doesn't know that it will be powered with a battery pack because there is no I2C communication available. The load should be the same but the battery pack will be discharged until cut-off voltage now. Normally our device shutdown and stops discharging in a controlles manner with a certain reserve of remaining capacity. I'll let you know tomorrow if it worked well. BR's Marcel + +Hi Andy, attached you will find the bqStudio log file. You can see in line 1881 that "TrueRemE" jumps from 596 cWh to 609 cWh during discharging process without any changes of the load. That's not really nice because it leads to a suddenly increased displayed remaining runtime during discharging process. BR's Marcel EDIT: It seems that the remaining energy after about 100 minutes of device runtime (after the jump) is more reliable regarding the calculation of the remaining runtime. bqStudio_log_FMO1_clean.log + +Marcel, TrueRemCap and TrueRemE will change anytime the gauge triggers a new simulation. Each simulation is run with a different set of inputs. Rate, Resistance, and temperature all all things that change. The amplitude of the change depends greatly on the new conditions. The jump you see if most likely a small resistance update and is expected behavior. If you want the value to not change please use the "Smoothed" value. This will remain constant but would makeup and delta over the remaining section of the discharge. Thanks, Eric Vos + +Hi Eric, thanks for your reply. We don't get what you mean with "smoothed" value ? Where can we get it and what does it make ? We're also wondering why the simulation seems to start everytime after about 100 minutes of device runtime. There is no change of temperature or anything else. Is there a way to let the gauge trigger a new simulation after some seconds of device runtime ? Best regards, Marcel + +Marcel, During discharge the gauge will hit points that we call grid points which will trigger a simulation. This is where resistance is calculated and gets updated. If you have [SMOOTH] enabled in the settings DataMemory page then the gauge will report a filtered FCC and remcap on [Full Charge Capacity] and [Remaining Capacity]. In addition, [Flt Remcap] and [Flt FCC] are also reported. Thanks, Eric Vos + diff --git a/data/text/DLP2/893973 b/data/text/DLP2/893973 new file mode 100644 index 0000000000000000000000000000000000000000..3d59afee25e5ea5fac79f077d782f1f3b7ccee68 --- /dev/null +++ b/data/text/DLP2/893973 @@ -0,0 +1,8 @@ +TPS23756: CS communication failed + +Part Number: TPS23756 Hi Sir, My ctm uses tps23756 as their poe source. when start poe func, the cs mesh port communicates failed. we doubt because of the unsuitable design of the voltage transformer,would you pls give some recommendations on this issue? BR Sara + +Hello Sara, I can speak to the operation of the TPS23756. I cannot speak to the data or communication protocols. At a high level, if the power path is interrupting the data path, it sounds like there is an isolation issue. Whether that is grounding, signal path or some sort of coupling would take some debug work to validate. One way to control the ramp is to increase the input bulk capacitance, which will slow down the turn on time. I would encourage you to work with the PHY vendor support system as well to get multiple debug angles on it. If this post answers your question, please indicate so by marking this thread as resolved. Thank you. Regards, Michael P. Applications Engineer customer organization + +Hello, This thread has not had a post in a few weeks. I am going to close it, but feel free to reopen it by posting a reply. Or, you can open a new thread. Thank you. Regards, Michael Pahl + diff --git a/data/text/DLP2/894069 b/data/text/DLP2/894069 new file mode 100644 index 0000000000000000000000000000000000000000..5665f7b43222fa4789848d9235da4e6a57bd3793 --- /dev/null +++ b/data/text/DLP2/894069 @@ -0,0 +1,16 @@ +On the problem of the output voltage instability of LM25145 + +Our company is using this power solution for the first time. There are two power supplies on the module, 24V power supply, one design output 3V, one design output 4V, the following problems exist: 1. The output of 3V, the actual output is 2.8V, with a 1A constant resistance load, the output voltage drops to about 1V; 2. The output 4V, without load, the output voltage is 1.8V; 3. Remove the capacitor connected to the soft-start pin SS. The two outputs return to normal and the load is normal. Hopecompany can provide a solution, thank you. + +HI user, I recommend completing the LM25145 quickstart file to check compensation values. The file can be downloaded from the product folder. Please send this completed file and your PCB layout for review. Note that a SS cap is required here as it is also used for stability of the SS-to-FB clamp amplifier. It should be connected close to the SS and AGND pins. Also, what FETs are used here? REgards, Tim + +UNI-FSDB01-V1.1-R SCH.pdf + +UNI-FSDB01-V1.1-R PCB.pdf + +Thanks for sending the schematic and PCB. Please send a completed LM25145 quickstart file: /tool/LM25145DESIGN-CALC Regards, Tim + +Here are some notes on the schematic: Input UVLO divider should be taken directly form the input bus (not the VIN pin of the controller). Check stability using the quickstart calculator (see link above) at the two output voltage settings. Use the effective value for output capacitance (derated for Vout). NC pin 9 can be tied to the DAP on the PCB. Regards, Tim + +In terms of the layout, app note SNVA803 specifies best practices for the power stage. This includes tight input capacitor placement to keep the switching loop parasitic inductance as low as possible. Also, the copper area for SW should be as small as possible to mitigate EMI (no vias to inner layers either). Gate drive traces should be short and direct (at least 25 mils wide) and HO and SW should be routed as a diff pair. The high-side FET is the hotspot, so use VIN copper for heatsinking. For the controller layout, consider adding an AGND island, similar to that used in the LM5145 and LM5146-Q1 EVMs, and place the lower FB resistor directly from FB to AGND close to the pins. See the controller datasheet PCB layout guidelines for more detail. + diff --git a/data/text/DLP2/894089 b/data/text/DLP2/894089 new file mode 100644 index 0000000000000000000000000000000000000000..49cbc539bd14ae69aa399c9158d8d1083cdbe9ce --- /dev/null +++ b/data/text/DLP2/894089 @@ -0,0 +1,22 @@ +BQ24650: Replace UC2906DW with BQ24650 + +Part Number: BQ24650 Hello at the Moment i design a new system with lead acid batteries. My System hat 24 V DC Supply an 2 Leadacid batteries in Series. At the Moment i use the compination Step up converter and UC2906DW. I like to change the batterie charger to the BQ24650. I guess that i did not need a step up converter. Know my Question: Can the BQ24650 charger two lead acid batteries in Series? Every Battery has 12 C DC. At the moment i Charger with 27.6 V If the Power is lost i switch a Relais to supply from the batteries. Can some help me in this case? Kind Regards Oliver + +Hi, BQ24650 has a recommended maximum input voltage rating of 28V, and supports a battery voltage of upto 26V. As this is a buck charger, it requires an input voltage higher than the output voltage and the minimum threshold is defined by the SLEEP comparator, which can be found in the EC table of the datasheet. If you are not using a solar panel as your input source it is recommended to use BQ24610 instead, as the mechanism to charge the lead acid batteries is the same for 610 as it is for 650. + +Hello Thanks for your answer. I think i have to discripe my problem one more time. I search for a Solution without step up. So my first idea was the BQ24650 i think there is a step up funktion includet. I made a drawing for better discusionBRN3C2AF4CED649_000008.pdf + +Hi, I cannot read the text for what is in between output of BQ24650 and SYSTEM. This is a valid way of using BQ24650, as you can refer to the user guide which contains the EVM schematic where this configuration is implemented. in the EVM a simple diode is placed between the battery and SYS, so that when input adapter is present, the diode will reverse bias and adapter will solely provide SYS, and when adapter is removed, the diode will forward bias and battery will provide SYS. + +Hello Between the BQ24650 an the System is relay. In Case the external 24V supply has a breakdown, the relay switch the battreries to the system. I do not use a diode, cause my normal voltage is 24 Volt an not 27,6 V. I have a solution with the UC2906 but i think this IC is very old an the new one is better. + +Hi User, What is the maximum charge voltage of your batteries? What value will you be looking to configure the charge regulation voltage of the BQ24650 to? + +Hello the maximum charge voltage of the Batteries is 28,2 Volt. I will set it to 27.6 Volt. My Inputvoltage for the charger is24 Volts. Kind regards Oliver + +Hi Oliver, This is not a possible use case for BQ24650. BQ24650 is a buck charger, which means it steps down the input voltage to the output voltage, and needs an input voltage higher than the output voltage. The SLEEP specification in the datasheet is the minimum difference between input and output voltage that the charger needs to remain operational. In SLEEP mode the charger is disabled and enters a low quiescent current mode, so for your system the charger would be disabled as battery nears full charge. For such a system you would need to incorporate a buck-boost charger, which could handle buck charging when battery is discharged, and boost charging when battery is near full charge (higher than input voltage). This is what I referenced in the first response as well. For buck-boost portfolio you can refer to BQ25713 or BQ25710 depending on communication interface preference SMBus vs I2C. There is no standalone buck-boost charger. + +Hello i think the bestway is a step up converter to 32 Volt. For charging i think the best Way ist to use UC2906DW or BQ24450. So i can use a standart applikation. + +Hi, The issue with BQ24650 is that the max recommended operating condition is for a 28V max input voltage, so stepping up 24V input adapter to 32V would not be feasible. Even though the abs max is rated higher than this, we do not recommend using larger than a 28V input voltage applied to VCC of BQ24650. This is not enough headroom for your charge regulation voltage, for the charger to be able to operate correctly. I am not familiar with the UC2906DW so I cannot comment on that + diff --git a/data/text/DLP2/894115 b/data/text/DLP2/894115 new file mode 100644 index 0000000000000000000000000000000000000000..e2b8a0d792b3f4dc474f87096bc2df259849e001 --- /dev/null +++ b/data/text/DLP2/894115 @@ -0,0 +1,18 @@ +UCD90120A: Potential data flash corruption + +Part Number: UCD90120A I have a board with UCD90120A being used as power sequencer. The UCD90120A has been programmed to control the power sequencing of multiple ICs on the board. The board has been working properly for about 4 months and went thru multiple power cycle during this period. However, it was observed that the board is no longer functioning out of sudden. After investigation, apparently the UCD90120A is faulty where the part is now back to the default configuration for some reason. Once we reprogrammed the UCD90120A, the board recovers. My questions are 1) What could possibly cause this problem? 2) Is it possible the internal flash got corrupted and therefore it is back to default configuration? 3) How do we know for sure the flash got corrupted before? 4) Is this a common or known issue? Is there any way to prevent this from happening again? + +Hello Could you please share your schematics and project configuration file so that we can review? if you have concerns to share on the E2E forum, you can ask yourcompany representative to forward. Thanks Yihe + +Hi Yihe, We've send the information to thecompany representative to forward to you. Thanks + +Hi Thank you for the updates. Once receiving the materials, we will review and update you. Regards Yihe + +Hi Yihe, Any update on this? Hope to hear from you soon. Regards, Faidzul + +Hello We have updated ourcompany reprehensive and he will forward the responses. Regards Yihe + +Are there any general technical details around this issue/resolution that can be shared? Thanks, Stephen + +Hi A brownout circuit described in the datasheet will solve this issue. Regards Yihe + diff --git a/data/text/DLP2/894164 b/data/text/DLP2/894164 new file mode 100644 index 0000000000000000000000000000000000000000..3556e303a8f0f848638098b755bca2ab793dbe5a --- /dev/null +++ b/data/text/DLP2/894164 @@ -0,0 +1,14 @@ +BQ25713: 1 cell buck charger with boost operation + +Part Number: BQ25713 We are looking for Li-ion 1 cell buck charger with boost operation. Vin: USB 5V VCHG: programable, typ 4.2V ICHG: up to about 5A Boost operation: 12Vout, 2.3A from battery power I think bq25713 can meet these requirement, is this right? Please let me know if you have any other devices. If bq25713 is best device, can we use bq25713 with 2 switch circuit? In this use case, bq27513 is used only as buck charger and boost converter. So I think Q3 and Q4 is not needed. Best Regards, Kohei Sasaki + +Hi, Kohei, That is right. BQ25713 is our latest device in the switch-mode buck-boost charger family, however, BQ25713 does not support 2-switch buck-only circuit. Regards, Tiger Please click "This resolved my issue" button if this post answers your question. + +Tiger-san, OK, I understand. Doesn't bq25713 support 2-switch buck circuit because it has not been verified? Do you have no other optimal device? Best Regards, Kohei Sasaki + +Please take a look at our newly released BQ24800 for your application. + +Tiger-san, Thank you for your reply. I could checked bq24800 datasheet. Is there any other internal FET version device of bq24800? And furthermore, 5V output is required in battery only boost mode. I think bq24800 cannot out 5V in battery only boost mode. Best Regards, Kohei Sasaki + +I don't have other suggestions. + diff --git a/data/text/DLP2/894250 b/data/text/DLP2/894250 new file mode 100644 index 0000000000000000000000000000000000000000..b4fe3d05515eea0868603bc65ff947c0f303857d --- /dev/null +++ b/data/text/DLP2/894250 @@ -0,0 +1,33 @@ +TPS7A4501-SP: Current Limit Response. + +Part Number: TPS7A4501-SP Hi, Good day. Our customer wants to know if we have an information about the response speed of the current limiter of TPS7A4501-SP. I would appreciate if you can share this information with us. Thank you. Regards, Cedrick + +Cedrick, Let me research this and reply back. Hopefully should have data early next week. Regards, Wade + +Hello Wade, Thank you for your support. I'll be waiting for the data. Regards, Cedrick + +Hello Wade, I would like to know if there's an update for this request? Thank you and have a great day. Regards, Cedrick + +Cedrick, I was able to locate some scope shots of the overcurrent response. Unfortunately, the timescale is fairly large 400ms/division. However, the results show that the current hits a peak, then decays slowly to either steady state or thermal trip. The steady decay is due to self heating as most of the power is dissipated across the output transistor. Based on this time scale, I don't see a higher peak other than the initial peak. I will be attempting to get into the lab next week, and I can take some zoomed in shots to verify. The below scope shot is result 12V output with direct short to ground. This plot was taken at cold, and in this case it does not reach thermal limit within scope capture. Let me know if this is sufficient to resolve the question with the customer. Regards, Wade + +Thank you for the effort Wade, I understand that it might be difficult to measure things at them moment. (And I'm not in any rush. :) ) Assuming I understood the datasheet correctly, the current limiter isn't tested post-production, which is probably why no specific (range of) numbers are defined for its behaviour? But based on the scope screenshot, it would seem that the spice model is reasonably close to reality, so that's a comfort. I was indeed specifically interested in the section at the start, since I'm trying to work out the current limitation behaviour in slightly more detail. Since there is a current limiter upstream which has a response time of <100 µs, and it would be preferable if the local one activates before the global one in most instances (skimming over a whole list of other reasons). At the same time, I was also somewhat curious about the startup behaviour, simulations seem to indicate that the regulator might go through quite a few on-off cycles around an input voltage of 1.1 V if starting slowly with a large capacitive load. However, since LTspice seems to have some issues with this model, I was wondering if this is normal/expected behaviour or a peculiarity caused by by the way the regulator was modelled. Kind regards, Bart + +Bart, I was able to test 2 different scenarios with 2 significantly different results. Both are supplied with 7V input, and 5V output. The first scenario has the device power up and regulating with no load, then a very low resistive short is applied to the output. The EVM has 22.1uF that is charged up in this configuration. The peak current reached 18.8A in approx 4uS, then dropping back in another 16uS or so. The second configuration is with device input powered, but in shutdown. In this case the output caps are not charged. In this case, the overshoot is very limited, and the device will current limit within 16uS or so with peak at 2.7A. I am not familiar with what you are describing for start up behavior. I can try to duplicate your startup simulation and verify model behavior with pspice. How much capacitive load? What ramp rate for Vin? Shutdown tied to Vin? I am assuming that you are using the unencrypted pspice transient model? Regards, Wade + +Updating to add the graphs that did not make it last time. Test 1 Test 2 Regards, Wade + +Hello Wade, Those numbers seem to agree reasonably well with what I see from the simulation. That's one less possible issue to worry about, thank you! But in terms of spice, yes I'm currently using the unencrypted PSpice model. I heavily suspect the source of the problem is a minor non-linearity in the model, hence why I initially asked your colleague if it's possible to acquire a non-encrypted version of the encrypted PSpice model (e.g. under NDA). What I see would be easily explained by there being a threshold somewhere that activates the output, sudden activation would cause the voltage to drop again because of the capacitance, deactivating the regulator. Sadly the issue is a bit capricious to replicate, but an easy way to consistently get it in LTspice is the following setup: R1 N003 N004 2.2k +R2 N004 0 1k +XU1 N004 N002 N002 N003 0 TPS7A4501_TRANS +R4 N004 0 2.37k +C1 N003 N004 22p Rser=10 +C2 N003 0 22µ Rser=0.08 +C3 N002 0 1µ Rser=0.05 +R77 N002 N001 0.05 +V1 N001 0 PWL(0 0 100m 6.3) Rser=0.1 +R3 N003 0 10 +.tran 0.8 +.lib TPS7A4501_TRANS.LIB +.backanno +.end Voltage rise times in the order of 5V/100ms seem to consistently do the trick in fact. This is what it looks like in LTspice: Detail of the problematic activation of the regulator: It's purely the activation of the regulator that seems to be the source of the issue, skipping it by applying a quick voltage rise between 0.9 and 1.2V seems to entirely remove the problem: Best regards, Bart + diff --git a/data/text/DLP2/894306 b/data/text/DLP2/894306 new file mode 100644 index 0000000000000000000000000000000000000000..7d2e6f49aee279b1923f4196633be48194014215 --- /dev/null +++ b/data/text/DLP2/894306 @@ -0,0 +1,24 @@ +TPS23523: How to invert the PowerGood pins when also using an Oring-FET? + +Part Number: TPS23523 Hi, we've done a design based on the spec (9.2.2.10 Power Good Interface to Downstream DC/DC) to deactivate the downstream brick of the design. However, we needed to tweak it a bit to get it work because we need to invert the PGb signal. Here is what my design should have : Hotswap GOOD PGb = 0 Brick Enable pin = open Hotswap NOT OK PGb = Open Brick Enable pin = 0 On my design the issue I just found is that the voltage divider at VEE is not working when PGb is floating because VEE became floating also because of the oring-FET! By comparison with the hotswap spec (9.2.2.10 Power Good Interface to Downstream DC/DC) , on my design I also have an o-ringFET on the left…which disconnect VEE so the voltage divider is no longer working between RTN and VEE…My FET is then having 48V at his gate which failed the Vgs spec of 20V and burn it I guess… Does we can use another pin as a references to do that? like Vref or something else? Or any other idea? Thanks for your help! David TPS23523PWT_Nutaq.pdf + +Hi David, Thanks for reaching out! The circuit mentioned in Section 9.2.2.10 Power Good Interface to Downstream DC/DC of the datasheet should work even if you use ORing-FET. Have you tried that ? Regards, Rakesh + +Hi Rakesh, I didn't try the circuit in section 9.2.2.10 because on my side it's preferable that the enable of the brick is floating instead of pullin up. that way when PGb is floating, I need the transistor to be activated to put a 0 and deactivate the Brick instead of a pulldown, like in my schematic added. But by doing that VEE is disconnected to the voltage divider is not working. Does any other pin can serve as a reference instead of VEE? I'm doing some calculation to use exactly like the section 9.2.2.1, but that's tricky as the brick outputs also a voltage on his enable pin when enabled...that's why it's better to make it floating to put it ON. Thanks + +Hi David, You can consider using optocoupler as below. When PGb=OPEN, photo-diode conducts to pull down the brick enable pin to LOW. similarly, it eaves the brick enable pin OPEN if PGb=0. Best Regards, Rakesh + +Hi Rakesh, thanks for this update. This way seems similar of what I've done in my schematic But on my side I also have an oring FET on the "left" of VEE pin, so when PGb is floating, this FET will also be OFF and we will lost again the references of the photo-diode, like I've done in my schematic... If connecting it directly at -48V input, I will lost the oring-fet protection... That's seems difficult to find a solution… Does the gate of the FET can be used as a reference instead? does it keeps it's references to RTN when gates are OFF? Thanks + +Hi David, VEE of TPS2352x is the only reference available. Regards, Rakesh + +Ok, so what are my other options? I assume that when the oring FET gate and the others FET gates are off, the chip is still alive from RTN and -48V input...so any pin referenced to RTN would work no? I wonder now how the OV and UVEN pins are still working when the oring-FET is deactivated thus losing the VEE connection from -Vin48? Does it takes the references from somewhere else inside the chip? (like Neg48?) If OV and UVEN are still good, I wonder why my schematic is not working unless there is something different internally? Thanks for the clarifications + +Hi David, The system will have reference through the body diode of ORing FET to -48V. Regards, Rakesh + +Hi David, Can you provide test waveforms of the highlighted nodes with respect to VEE during startup. The drain potential of the hot-swap FET varies during turn-ON and turn-OFF. As you mentioned above, this would be the reason for the FET Q5 damage. Best Regards, Rakesh + +Hi Rakesh, you mean having the GND of the oscilloscope probe on VEE on the bottom or on the -48V input before the oring FET on the left? (not in the picture) I will try it at VEE. Regards, + +Hi Rakesh, I've taken multiple screenshots, and it seems that the bug comes from the gate that is referenced to VEE, and the Source at -Vout. I wonder if it would be better to reference the voltage divider of the gate to -Vout instead of VEE? like the Source pin? Thanks for your input RTN is following always the input supply, even if the voltage is below the threshold UVEN. OringFET never turn OFF? + diff --git a/data/text/DLP2/894554 b/data/text/DLP2/894554 new file mode 100644 index 0000000000000000000000000000000000000000..57c0932b8c6d9c1703de13f5fd9012968d42f8b1 --- /dev/null +++ b/data/text/DLP2/894554 @@ -0,0 +1,24 @@ +BQ40Z80: the learning cycle fail. + +Part Number: BQ40Z80 hello, i made the battery packs, 6S2P and 6S4P Lipo battery pack. and i have done learning cycle. 6S2P was done well. but 6S4P isn't done. (Norminal Vol : 21.6, Capacity : 13,400mAh) my learning cylce step below. 1. Check and write proper value of Register, Chem, Calibration. 2. After Checking, Set Gauge_EN and RDIS and Clear VOK. 3. After step 2, fully discharging battery pack. 4. Take a rest time, 5 hours (the Rest flag should be set) 5. after rest ttme, fully charge battery pack. at that time, Lstatus : 0x04. 6. Take a rest time, 2 hours in this step, Lstatus should be 0x05. but my 6S4P Pack's Lstatus is 0x06. what is wrong my steps? ref > How to Complete a Successful Learning Cycle for the bq40z80 + +Can you provide a bqStudio log file for your learning cycle so that I can check if there was something wrong with your learning cycle? Also, make sure your chemistry id is proper and discharge the battery cell to the minimum voltage of the battery as specified in the manufacturer’s data sheet. Andy + +Thank you for reply. this is my log file. please check detached file.200407_LearningCycle_CHG.xlsx + +I have checked your log file and I cannot tell whether the battery cells were discharged to empty and relaxed. Do you have a continuous bqStudio log for your entire learning cycle? Andy + +Dear Andy. hello, you mean if there are somthings wrong, example Lstatus 0x06 at Charging step, i will continue learning cycle? i stop the learning cylce when there are somethings wrong. Unfortunately, there are almost same. after charging and taking the rest time, the Lstatus is 0x06. so, if i ignore it, i can log the whole learning cycle. please wait a few day. i will log whole cycle. thank you + +If the LStauts() is already 0x06, it means a QMax update and resistance update are both done. I would suggest you run the learning cycle again so that the LStatus() changes to 14 (0x0E). You can find these details in the app note you already have. + +Dear Andy i got it. but i don't understand. i know that Lstatus = 0x05 -> first Qmax update occur i think Lstatus should be 0x05 at first charging step. so i changed the Qmax cycle to 0, when learning cycle failed. once i follow your idea that don't care about 0x05. thank you + +As I mentioned before, I don't have your continuous bqStudio log so I cannot tell what happened to your learning cycle. If the LStatus() was only updated by the gauge itself and you never updated the LStatus manually, your learning cycle seems done since the LStatus() is already 0x06. I would suggest you run the learning cycle again to see whether the LStatus() can change to 14 (0x0E). + +i got what you mean. i think it maybe mix two battery pack(6S2P and 6S4P). how i can reset the learning cycle done? are there any way to reset learning cycle? thank you, Andy. + +I would suggest you dump a srec file before you start the learning cycle next time. If you want to redo the learning cycle, just program the srec file to bq40z80. I guess you probably have not done it yet. I would suggest you program the default srec file to bq40z80, have the necessary settings configured (e.g. chemistry id) and then do the learning cycle again. Andy + +Dear Andy i am doing new learning cycle. after downloading default firmware, i am followed the reference step. but, it doesn't work. at this challenge, i have some questions. 1. after downloading default firmware, the 'Full charge capacity' didn't match. So, i have to change some register. a. setting -> SOC Flag Config B : 0x99 : default setting make me can't charge my battery pack. because it isn't matched to set FC flag. So, i change the standard of FC set to Voltage level, not percentage. b. protection -> OC : Threshold : 10000mAh : default setting make me can't charge. after a little while of charging, OC Flag should set. because of capacity. 2. after changing some parameter, i was doing learning cycle. but, in step 3, REST and VOK never clear. i don't know why. could you tell me the way how i match the capacity? thank you Best Regard + diff --git a/data/text/DLP2/894562 b/data/text/DLP2/894562 new file mode 100644 index 0000000000000000000000000000000000000000..edf92c4c1506b8e908d489f0baa3ba3cd9dbbf3e --- /dev/null +++ b/data/text/DLP2/894562 @@ -0,0 +1,18 @@ +AWR1843: Is there a possibility of BPM transmission for 3Txs + +Part Number: AWR1843 Hi, I am using AWR1843 (mmWave Studio 2.0.0.2 and sdk_02_01_00_04), with which I have a couple of questions to be asked. 1. Is there a possibility for simultaneous transmission of 3 Txs (in BPM mode) and how can it be done? 2. Making use of 3 Txs, can I make use of a configuration as follows: BPM mode for Tx1 and Tx2, in order to obtain Azimutal information. i.e., Tx1 and Tx2 with 0 phase, then Tx1 and Tx2 with 180 phase and later make use of Tx3 alone for elevation purpose. Regards, Rohit + +Hello Rohit, 1. Yes. You can use all three Tx at a time. You need to select all the tx for select chirp in rlSetChirpConfig API and set the required BPM. 2. Requested feature set is possible to configure AWR1843 device where each chirp index you need to set with the selected Tx phase. You can refer MRR ver2.0 which has feature of beam forming where it uses similar features. Regards, Jitendra + +Hello Jitendra, Thanks a lot for the inputs. Well, I have tried the 3Txs in BPM mode (for each chirp having 64 samples) and was able to collect the data with the help of DCA1000. But, I wanted to confirm the way that it is done. I have set the BPM config tab in such way that I transmit T1+T2+T3 in 1st chirp, then T1-T2+T3 in 2nd chirp and T1+T2-T3 in 3rd chirp. For 1st chirp transmission, I SET the start & end chirp to 0 in sensor config tab and jumped to bpm config tab. I had start and end index as 0(by default) and set the TX Off and TX On for ALL the Txs to be 0. Then, clicked on SET and ACTIVATE. For 2nd chirp transmission, I SET the start and end chirp to 1 in sensor config tab, and came to the bpm config tab. I have the following picture attached. I found the Start and End index to be changed by itself to 511. I made changes only with the TX Off, TX ON for ALL Txs as follows. Then, clicked SET and ACTIVATE. For 3rd chirp transmission, I SET the start and end chirp to 2 in sensor config tab, and came to the bpm config tab. I have the following picture attached. I found the Start and End index to be same as previous by itself. I made changes only with the TX Off, TX ON for ALL Txs as follows. Then, clicked SET and ACTIVATE. Doing the further steps in Sensor config, I was able to collect the data. My questions are: 1. What's the importance of Start and End Index in BPM config tab, how do I make use of it? 2. Is the phase part done correctly as per the configuration that I wanted i.e., wrt to TX Off and TX ON? 3. After I click ACTIVATE, I find the tool to be in "Not Responding" state for sometime. Does it happen that way or have I missed anything to change? 4. How can I confirm that the hardware is transmitting in BPM? Regards, Rohit + +Hi Rohit, Thanks for your patience. 1 & 2. The start index and the end index have the same meaning as in the "SensorConfig" tab. You can configure different BPM values for each of the chirps or a set of chirps using the "start" and "end" index entry. For this, you have to manually set that value according to your configuration. The default values are just a limit for your programmed configuration. 3. You can press “Set” for sending one set of chirp start index and end index along with its info present in the GUI. Then you can do “Activate” for sending all the configured sets of chirp start index and end index along with its info at one shot. It takes a little while to send this configuration to the device. 4. You can confirm that from the post proccesing plots of the mmWave studio. The "Phase Stability across chirps" plot shows you the correlation for each chirp, and to verify, you can use one Tx per chirp Regards, Ishita + +Hello Ishita, I appreciate your inputs, they were very informative. Just had one more thing to get it clarified regarding the BPM Compensation (decoding part). Currently, I am making use of the ADC data for my algorithm. So, do I have to make use of BPM compensation in my Pre-processing algo or is the BPM compensation already done in the H/w or mmWave tool. Because, by observing the data I find that they have already been compensated in the H/w or tool. It would be helpful if you could confirm me on the same. Regards, Rohit + +Hi Rohit, Raw ADC is sent from device with the Phase rotation (BPM). So you should be able see each successive chirp with the programmed phase. Say for example, if you've programmed the BPM code to be alternate for each chirp (i.e 10101010), you will see the next chirp 180 degrees rotated and so on. Regards, Ishita + +Hello Ishita, Thank you for your response. we were using the AWR1642 EVM in BPM mode, but I missed the following points. Our understanding was that in first chirp TxA will be “0”, TxB will be “0” and in second chirp TxA will be “0” and TxB will be “1”. So we did using bpmCfg 0 0 0 1 in the Config file. We didn’t check " " in MmwDemo_CLIBpmCfg. So according to the config we have disabled the BPM, so we didn’t see much change in output, now we shifted to AWR1843. In AWR1843 EVM we are having 3 Tx that are to be working together. Now once we started doing change to cli.c file in MSS we came across the mistake. So we added another field chirp2Idx " " But when we collected the BPM data we followed the pattern as described in above conversation i.e chirp1: 000 (TxA+TxB+TxC), chirp2: 010 (TxA-TxB+TxC), chirp3: 001 (TxA+TxB-Txc). My question is how to configure the hardware in CCS and what could be appropriate command line that can e used. Currently I have added bpmCfg -1 1 0 0 0 and the system is running like it was working for TDM mode. I am sure this is not the correct way. Regards Praveen Mogre + +Hello Praveen, If you trying xWR18xx mmw demo then it doesn't support BPM feature in this application. You need to modify the application for BPM support. You can take reference from xWR16xx mmw demo for BPM implementation but that has BPM for two Tx only. Regards, Jitendra + diff --git a/data/text/DLP2/894596 b/data/text/DLP2/894596 new file mode 100644 index 0000000000000000000000000000000000000000..fe36a84a6b259c30914cc422604e51ff8f294bc7 --- /dev/null +++ b/data/text/DLP2/894596 @@ -0,0 +1,12 @@ +TPS22920: TINA transient analysis + +Part Number: TPS22920 Hello, My customer is facing a couple of issues at TINA transient analysis as follows. At TPS22920_old_sch.tsc, VIN oscillates as framed with RED circle.What’s wrong? TPS22920_old_sch.tsc And at TPS22920_new_sch.tsc, my customer gets the following error when load R2>5ohms. What’s wrong? TPS22920_new_sch.tsc Best regards, K.Hirano + +Hi Hirano, Welcome to E2E! In the old schematic one mistake I see is that they have VIN connected directly to the ON pin of the device. I attached an RC delay to the old schematic an acquired the following behavior. For new schematic follow these steps: 1. On the Analysis tab go to Set Analysis Parameter 2. On the bottom right corner click on the hand and select open. 3. Find the Transient Convergence Solutions.PRM file and open. 4. Select okay. Analysis should be able to run. Let me know if you have any questions. Best regards, Andy Robles + +Andy, Thank you for your responses. My customer was able to solve the issues, but still has a new question. At the TPS22920_new_sch_1st.tsc, my customer deleted U2 once and then undo it, TPS22920_new_sch_2nd.tsc. Then he got an error as follows. He just delete U2 and undo it, so the two .tsc files should be identical. Why he got the error? What’s wrong?TPS22920_new_sch_1st.tsc TPS22920_new_sch_2nd.TSC Best regards, K.Hirano + +Hi Hirano, When the component was deleted something within the code must have changed, and when they undid the deletion the code might've not updated the same way. Did the customer do anything else after they deleted the component? When I open the file that works and try to recreate what the customer did I do not get the same error that the customer is seeing. In my case when I undo the deletion the simulation still works fine. I only see the error when I open the second model attached, so there has to be something different within the codes of the simulations. Since the first simulation still works fine I would discard the second simulation and continue tests on the first file. Best regards, Andy Robles + +Hi Hirano, Andy, I have seen this before. This is caused by the "Post-processor" tool. When you deleted and re-added the component, the post-processor lost its reference to the nodes of that component. You can fix this by deleting all curves from the Post-processor window and then re-running the simulation. I did this on the attached file and the error goes away. Unfortunately you will have to set up any post-processed curves again. TPS22920_new_sch_1st_fixed.TSC Best regards, Ian Williams Applications Manager Current Sensing + diff --git a/data/text/DLP2/894616 b/data/text/DLP2/894616 new file mode 100644 index 0000000000000000000000000000000000000000..f48d03fa3e1f191b2826a3003110133185a3806b --- /dev/null +++ b/data/text/DLP2/894616 @@ -0,0 +1,24 @@ +UCC28950: UCC28950 TINAcompany Steady State Reference Design Simulation + +Part Number: UCC28950 Hello Dear Experts, I am working on UCC28950 Steady State Reference Desing simulation and I try to simulate my 2kW dc dc converter design using this reference design simulation. Here I have a question about UCC28950 Steady State Reference Desing . - In the output of dc dc converter, there are output inductor(Lout) and capacitors(Cout). These capacitors and inductor have IC value . For example , (Lout= 2U DCR=0.75M IC=20) -What is the IC ? -What is the importance of IC value for bobin and capacitors? I attached below related circuit picture from UCC28950 Steady State Reference Desing simulation circuit. + +Hello Bilgin In this context 'IC' means Initial Condition. This is the value that the simulator assigns to the component at the beginning of the simulation. It means that the simulation gets close to its steady state condition more quickly than it would if the initial condition were set to zero. Normally one would set the IC for the capacitor to be the regulated output voltage and the IC for the inductor to be the load current. Regards Colin + +Hello Colin Thanks for your reply. For example , in my 2kW dc-dc converter design at full load output is 32V ,62 A. -In this case my Cout capacitor has IC=32 , at full load my Lout bobin has IC=62 . Is it OK? Also,when I simulate the transformer in steady state solver , this simulation results are changes and results(Vout,Iload) nearly equals to zero. I know UCC28950 model is transient model and it can be simulated in transient mode but, I have a question. - How can I simulate this circuit correctly in steady state solver or steady - state mode? Thanks. + +Hi Bilgin Your IC values are correct - I'm not sure what you mean about simulating the transformer - can you post your sim file here and I'll have a look at it. Regards Colin + +Hi Colin I wrote 'transformer' by mistake . I wanted to write "Circuit" instead of 'transformer'. Sorry . I am working on PMP8740 reference desing dc-dc converter circuit. I want to simulate this circuit and understand working principle. I used almost the same values in PMP8740 dc-dc converter circuit schematic except for voltage and current loop . Also, Using this simulation I want to learn full bridge main transformer technical specs. Now, in simulation output voltage about 24 volt and output current is about 44 amper at full load. But my expectation is 32V and 60A at full load. What is this circuit problem I don't know. I attached my simulation file. Please can you help me ? Thanks.2kW dc-dc converter.TSC + +HI Bilgin I've been able to run your sim file and it looks like the controller is running in current limit. COMP is high which is due to the output voltage not being at the set point. I reduced the CT burden resistor form 22R to 11R and the output voltage increased significantly but only to about 28V. (I changed the reset resistor (R2) from 4.8k to 1k too. I'll continue to work on this but it's slow because I can't spend 100% of my time on it. The basic message is that this sim can be made to work, we just need to do a bit more debug on it. Regards Colin + +Hi Colin Thanks a lot for your help . I understood the problem . I changed the resistor values and I saw the your results.(Vout=28V approx , I load= 53A approx) I am also working on simulation. If I get important changes in results , I will get back to you. + +Hi Bilgin I noticed that the inductor IC doesn't work - it makes no difference whether you set 60A or 0A. I also think that the loop response is relatively slow so you see some damped oscillations in the output - you may want to look at the sim from 9ms to 10ms rather than 500us to give it time to settle down. I reduced the dead times you were using to the minimum value because the original values were significantly reducing the available duty cycle. Changed R3 from 49.9k to 13k. DELAB time was 1us. Changed R4 from 49.9k to 13k. DELCD time was 1us. Changed R4 from 49.9k to 13k. I increased the input and output capacitances proportionally - this didn't make much if any difference Increased C2_2 from 0.47u to 1.5u Increased C3_2 from 330u to 1000u Reduced R1_2 from 22R to 7R Reduced R2_2 from 4.87k to 700R The system seemed to be locked out at Dmax so i reduced the primary turns from 19 to 17 get more volts on the secondary. This may or may not be needed but it didn't help. The primary leakage inductance should be reduced because the primary current at 1600W is 2.5 times greater than at 600W (EVM) to keep the time needed to reverse the primary current when the primary changes polarity - (dt = l di/V) Changed L2 from 10uH to 1uH and DCR from 0.2 to 0.002 - this helped a little. The IC for the inductor models seems not to work - the workaround is to run the sim for longer Set IC for L2 to 0 For some reason I don't seem to be getting Dmax even although COMP is locked high (at around 4V or so) which would normally generate Dmax. I'm going to look at that now. Regards Colin + +Hi Bilgin I checked that the controller model will run from Dmin to Dmax so there should be no reason why it is the cause of the problems. I't suggest that you double check the component values - especially those of Lout and the current transformer burden resistor. You should also look at the values of leakage inductance in both the shim inductor and the transformer primary. The leakage inductance determines how long it takes for the current in the primary to switch direction when the transformer primary polarity changes. No energy is transferred from primary to secondary during this process and it can be a significant part of the duty cycle. You will almost certainly need to run the sim out to 10ms or maybe even longer to allow Vout to settle at its final value - Monday is a public holiday in Ireland - I'll be back at work on Tuesday 14th. Do please let me know how you get on. Regards Colin + +Hi Colin Thanks a lot for your valuable informations. I changed dead times , input and output capacitances and L2 values according to your values . I looked at the sim file 9ms to 10ms time period. Finally , output voltage is between 31.36 V and 31.42 Volt and Load current is between 59.28A and 59.37A. I've been able to run my sim for my desired output voltage and current level. Thanks for your help. As far as I understood , the main problems are in Lout , current burden resistor and both the shim inductor and the transformer primary leakage inductance. In PM8740 dc- dc converter schematic , CT burden resistor is 16,2 ohm and reset resistor is 100k. When I used these values output voltage and load current are significantly reduced. I have question about CT burden resistor and reset resistor . How do you calculate CT burden resistor 7R and reset resistor 700R values? Also , Full bridge transformer and shim inductor are custom design transformers and I have no informations about their leakage inductances. How can I adjust these values ? I attached the my sim file results and pmp8740 dc-dc converter currrent sense transformer circuit below. Thanks. . + +Hi Bilgin It's great that you have made some progress. I put in 7R as a burden as a guess to get the sim running and it worked. I'm still trying to figure out a couple of things - and I'll post here later. If you get a chance, can you post your sim file here too so that I can run it for myself. Thanks Colin + diff --git a/data/text/DLP2/894810 b/data/text/DLP2/894810 new file mode 100644 index 0000000000000000000000000000000000000000..ededf63e95c681f3f8a964eedab67e3c468b67fd --- /dev/null +++ b/data/text/DLP2/894810 @@ -0,0 +1,24 @@ +TPS65400: Error Amplifier Gain-BW + +Part Number: TPS65400 What is the Unity Gain Bandwidth of the internal error amplifiers for this device? The data sheet does not specify. and I suspect we might be BW limiting with higher Rcomp values. + +Hi, Kurt The internal error amplifier is OTA, the trans-conductance amplifier, the GBW = Gm/Ccomp, it is related with compensation capacitor at COMPx pin. (Its own capacitance at COMPx is very small, it is about 10pF, it can be ignored.) + +Thank you for the rapid response Zhao Ma as I am working a time-critical problem. For that theoretical equation is the result in radians or Hz? And what does it typically measure on a real device? On the actual part I am seeing much less than theoretical even with no Chf cap. + +Hi, Kurt 1. The unit is radians. 2. Just for OTA itself, usually it is a single pole system, so the GBW=Gm/Cc is to calculate the bandwidth for OTA itself. For the buck converter system, there are other poles and zeros, the bandwidth of converter cannot be calculated by this equation. And you can refer the calculation in page 24 of datasheet: Feedback Compensation. Usually we don't care about the OTA's GBW, we care about the whole system stability, so usually we should measure the Bode plot for the whole buck converter system. 3. What is the " Chf cap"? + +Thanks Zhao Ma, This is not my first time working with SMPS stability; I am very familiar with the topic. We measured the loop response of our design and found we couldn't get our desired crossover frequency. When I looked at why, it appeared as if the OTA may have insufficient BW. So I want to verify my hypothesis. To answer your last question, what I call Chf is what figure 17 in the data sheet calls Croll. 2.) GBW for an ideal OTA is Gm/Ccomp but the OTA inside the TPS65400 is not ideal. You said there is about 10pF of stray capacitance on the COMP pin. So using your numbers the GBW should be (120uA/10pF)/(2*pi) = 1.9MHz. But there is no way this OTA has 1.9MHz of bandwidth. I measured the error amplifier response on the EVM (from TP2 to the COMP pin) with the mid-band gain set near 0db (Rc=15.4k and Cc=4700pF) with Croll=0 (not loaded.) I got the response shown below. You can see that with only the 10pF stray on COMP the OTA is already rolling off at 60kHz (-3dB point.) So my original question: what is the GBW of the OTA inside the TPS65400 with 10pF Cc? Or asked a different way, what is Gm(f)? Gm has to have some dependency on frequency. A related question: What is the output resistance (Rea measured from COMP to ground) for the OTA? This will tell me what the open loop gain of the OTA is at DC. The reason this is important is we are using the TPS65400 to develop 1.1V @ 1.5A from a 12V input with very high output capacitance (200-400uF). The switching frequency is 600kHz with a 6.8uH inductor. In this case we need to get more than 20dB of mid-band gain that is flat out to about 150kHz to be able to get the crossover frequency up to 1/10th of Fsw. But it looks like the OTA is running out of BW down near 60kHz. To make matters worse, I can't use the type 3 cap (C1 in figure 17) to counteract the rolloff because the step-down ratio is high. The zero created by C1 is passive so I can't even get 3dB out of it before it flattens out. I have a few other observations and questions but let's start with the OTA BW first. Thank you for as rapid a reply as you can give. + +Hi, Kurt 1. As i know, there is no limitation for OTA's GBW in TPS65400. Just only for OTA, usually Cstray comes from the parasitic capacitance at output node of OTA, the Cstray is not big, usually it is about 10pF ~ 30pF. The output impedance of OTA (Rea) is usually about 1Meg~30Megohm. Since there are other poles in OTA itself, we cannot use Gm/Cstray to calculate the GBW for OTA itself. We can use this equation to calculate the GBW only for single pole system. 2. What is your configuration when testing Bode plot? did you remove the Ccomp (4.7nF)? From your bode plot, apparently there is a dominant pole in low-band, it looks like you didn't remove the Ccomp, did you? 3. I think GBW of the OTA itself inside is bigger than 200kHz. Usually we can think Gm doesn't depend on frequency, it is almost fixed at steady state. 4. For the whole converter system in TPS65400, we usually set the GBW to ~50KHz, you cannot get flat mid-band gain to 150kHz. And you can use type 3 cap(C1) to enlarge GBW slightly. BTW, I am not a designer for this part, i cannot get these specific parameters. Suggest to test the Bode plot for whole converter system directly, and check the pole and zero location. + +Hello Zhao Ma, You stated, "1. As i know, there is no limitation for OTA's GBW in TPS65400." If this was true then you would never say in point 4 below that "you cannot get flat mid-band gain to 150kHz," because if the GBW of just the OTA was not limited we most certainly could get flat gain to 150kHz. Way beyond 150kHz in fact. You stated, "Since there are other poles in OTA itself, we cannot use Gm/Cstray to calculate the GBW for OTA itself." If there are other poles inside the OTA these will limit the GBW of the OTA. You said it was not limited but now say there are poles in the OTA and poles by definition will limit the BW. This is contradictory. As I have been saying from the start, the OTA does have limited BW. You can see it in the transfer function measurement I posted above. Cstray will limit it as will the physical limits of the silicon. All I was asking is, what is the internal limit? You asked, "2. What is your configuration when testing Bode plot? did you remove the Ccomp (4.7nF)? From your bode plot, apparently there is a dominant pole in low-band, it looks like you didn't remove the Ccomp, did you?" That is a plot of just the Error Amp transfer function (from the feedback network to the COMP pin.) That is not a dominant low-band pole it is a dominant zero; And yes it is caused by Ccomp. But that is okay because the BW of the Error Amp will not be limited by Ccomp. Ccomp is what sets the zero to create a portion of flat mid-band gain. Croll will limit the BW but I have removed it. It is the pole near 60kHz (with no Croll loaded, just the Cstray) that tells me the OTA is nearing its BW limit. You stated, "3. I think GBW of the OTA itself inside is bigger than 200kHz." Answers that begin with "I think" are not engineering answers and are not helpful to our customers. My measurements show it is approximately 160kHz. I would expect this information to be in the original device characterization data. Can you let me know who can access this data? You state, "Usually we can think Gm doesn't depend on frequency, it is almost fixed at steady state." This is only true over a range from DC to some usable BW of the amplifier. In fact, the spec on the data sheet has to have been measured at, or over a range of, some conditions (e.g., voltage, temperature, Rload, Vin, frequency, ...) I would expect this to also be in the initial characterization data. Regardless, whether it is the Gm that is decreasing with frequency or a fixed Gm interacting with internal or stray C to create a pole, the OTA does have a GBW limit. You state, "4. For the whole converter system in TPS65400, we usually set the GBW to ~50KHz, you cannot get flat mid-band gain to 150kHz." Thank you for confirming my initial point. There is indeed a BW limit in the Error Amplifier. It is not unlimited as initially stated but is in fact something less than 200kHz. This fact appears to severely limits the use of this converter in high-frequency switchers with large output capacitance that also require a crossover frequency above 10kHz- 20kHz (for example we desire Fsw=600kHz, Vin=12V, Vout = 1.1V, Iout = 1.5A, Cout = 250uF, Lout = 6.8uH or 2.2uH, Fc=60kHz.) The pole created by Cout and Rout rolls off the power stage transfer function such that more than 20dB of mid-band gain is needed out past 100kHz+ to get a loop crossover at 60kHz. You state, "And you can use type 3 cap(C1) to enlarge GBW slightly." I almost never need to use type 3 compensation in a typical CM buck. The fact that it is needed at all with most TPS65400 designs is because the error amplifier BW is limited. Even then, the benefit is limited because type 3 uses a passive zero. It has no additional gain or phase increase once the feedback network reaches unity gain. Further, the lower the output voltage (1.1V in our case) the less benefit this passive zero contributes. When Vout = Vref it can't contribute anything. You state, "Suggest to test the Bode plot for whole converter system directly, and check the pole and zero location." I have done this. The loop is stable. But I cannot move the error amp pole high enough to get a crossover frequency much above 20kHz. Hence my initial statement "I suspect we might be BW limiting with higher Rcomp values." Can you tell me who can access the characterization data? Or who is more knowledgeable on this part? I can contact them directly. Respectfully, Kurt + +Hi, Kurt Sorry for confusion, some clarifications: 1. I said "there is no limitation for OTA's GBW" --> I wanted to say there is no intentional limitation, sorry, I didn't express cautiously. I believe any OTAs have internal limitation: the high frequency poles which are generated by Cstray in the middle path of signal transmission, the OTA in TPS65400 is no exception. 2. Ccomp and Rea(output impedance of EA) form the dominant pole for converter, Ccomp value definitely can impact the bandwidth of converter. Rcomp and Ccomp form a Zero which can impact the gain of mid-band. Could you let me know the schematic? Rcomp=?, Comp=? 3. Sorry for "I think". 4. Agree with you, the Gm only keeps constant over a range from DC to some usable BW of the amplifier. 5. We can use the zero formed by Rcomp and Ccomp to compensate the pole formed by Rload and Cout. For your application, appropriate compensation cam make the converter's crossover frequency larger than 20kHz, and close to 50kHz based on my experience. 6. Agree with you, when output voltage is low, the benefit of Cff will be smaller. 7. Please reduce Comp and increase Rcomp to enlarge the converter's crossover frequency, try to make the Zero compensate Pole (Rload and Cout). 8. I can access the characterization data if it is tested by ATE, what characterization data do you want to know? If you want to know the parameters related with design, I can help to contact the designer. Anyway, what problems did the customer encounter? stability? load transient performance? And could you send me the customer's schematic? + +Contacting you directly by email. We can post the solution/issue here once we resolve it. + +Hi, Kurt Attach the test results here. You are correct, there is another pole locates at ~30kHz which limits the overall BW. I need to close this question now, further more questions, we can talk by emails. TPS65400_1p1V_600kHz.xlsx + +Thanks for working with me on this. From your measurements and mine it looks like the typical unity gain BW of the error amplifier lies somewhere between 100kHz and 160kHz depending on conditions of Rcomp and Ccomp. Inductors with values above 1uH under my operating condition pull the inductor pole (Km*Ri/L) down in frequency to where its phase impact is near to where the error amp phase is beginning to roll off due to limited BW. This can make it impossible to get sufficient phase margin for stability above 10-20kHz or so. My recommendations for anyone designing with this part under conditions similar to mine (actually all conditions for that matter) are as follows: 1. Keep L small. No more than 2.2uH under most conditions and 1uH or less with high capacitive, low-Vout, high Iout designs. This will keep the inductor pole as far away from crossover as possible (remember that the phase of a pole starts showing up a full decade below the actual pole frequency.) Ignore the guidelines for delta_IL (i.e., the ratio of inductor ripple current to total current.) With ceramic capacitors and single digit load currents, there really is no reason to try to keep the delta_Il at 30-40% maximum; Let it go to 100%-150% or more if necessary. Use the smallest value for slope compensation you can. This moves the inductor pole frequency up slightly. Increasing Gmps lowers the pole frequency but decreasing it lowers the power stage gain. So there is a point where making it too low requires even more gain from the already taxed error amplifier and a point where making it too high lowers the inductor pole too much. Experiment but I found the optimal number across different designs was usually 10A/V. 2. Use type II equations to compute Rc and Cc. But be aware that values of Rcomp much above 50-60 kohm will not yield the computed gain at crossovers much above 10kHz.. The error amplifier simply cannot deliver. 3. Leave Croll open; There is already 10pF stray capacitance present per your comment above, and there is no reason to add further roll-off to the error amplifier. It is doing this all on its own. 4. Place the Cff zero for maximum phase boost somewhere between the crossover frequency (this may not be the same as placing the zero at Fc) and the frequency of the inductor pole depending on performance. I have experimented with both. But be aware that the available phase-and-gain boost is limited the lower Vout goes (i.e, the closer Vout gets to Vref) because type III compensation uses a passive zero. There is no active gain behind it as would be the case with an OpAmp. If you can lower the Vref in your application then do it as this will add to the available passive phase/gain boost. A 1.1V output with a 0.6V reference yields almost 6dB of additional gain compared to a 1.1V output with a 0.8V reference. 5. If you get 45 degrees of phase margin you have done well. This is acceptable under many conditions. 6. Build, test, and tweak. Linear circuits are not linear when operated near BW or V-I limits. So be aware of relying on standard equations, of relying on equations that don't account for the inductor pole, of relying on equations that don't account for the limits of type III compensation, and of over-driving the injection signal when using a vector analyzer to measure transfer functions. + diff --git a/data/text/DLP2/894847 b/data/text/DLP2/894847 new file mode 100644 index 0000000000000000000000000000000000000000..018cef2e4ccf450e3dde9adfbffd8bfca2b8ebf6 --- /dev/null +++ b/data/text/DLP2/894847 @@ -0,0 +1,24 @@ +WEBENCH® Tools/TPS40400: Vout Calibration Function + +Part Number: TPS40400 Tool/software: WEBENCH® Design Tools Calibrate output voltage and use the method as follow: VOUT_CAL_GAIN = 100*[(Vout1-Vout2)/(Read_vout1-Read_vout2)-1]. VOUT_CAL_OFFSET = Vout3 - Read_Vout3. For meet the requirement, set the load to 6A and the full load is 12A. But I found that the gain whcih I calculate is not in the limit. The limit in the datasheet is -0.125---+0.121%. Why? + +The LSB is 0.4%. The range is -12.5% to 12.1% + +I know the information which you gave. I want to know why I calculate VOUT_CAL_GAIN out of the limit? The TPS40400 is with default value. + +What values do you have for vout1, vout2, read_vout1 and read_vout2? And what gain value are you calculating? + +@12Vin 6A Load vout1 = 0.584V Vout2 = 4.88V Read_vout1 = 0.625V Read_vout2 = 5.07813V Vout_cal = 100*[(4.88-0.584)/(5.07813-0.625) - 1] = 100*0.009207007 = 0.920700721 As you can see, vout_cal is out of limit. Does the formula need to multiply by 100? which parameter I can write to GUI? Thank you very much! + +How are you getting the wide output voltage range? Are you changing the external feedback divider? I am discussing this challenge with my team's pmbus specialist and I will get back too you on Monday. + +I use an external resistor in my circuit for get the wide output voltage rang. Different resistor can get differernt output voltage. Thank you very much! + +I emailed my colleague that works with PMBus and asked for an example on how to use VOUT_CAL_GAIN. He emailed me the typical calibration process outlined below. I think the difference in your scenario and the below is the example below is using 1 external divider gain. Since you have two different gains with the feedback divider, can you use two different vout_cal_gain. 1) Calibrate VOUT_SCALE_LOOP a. After Power-up, b. Set VOUT_SCALE_LOOP to match the nominal voltage divider from DIFFO to FB c. Set IOUT_CAL_GAIN to match the nominal DCR of the inductor + any current sense resistor used d. Set 2 different output voltages via VOUT_COMMAND, measure the real voltage they generate and read the READ_VOUT value. e. Adjust VOUT_SCALE_LOOP to correct the gain error from VOUT_COMMAND to Vout. i. VOUT_SCALE_LOOP (trimmed) = VOUT_COMMAND(pre-trim) x (VOUT1– VOUT2) / (VOUT_COMMAND1 – VOUT_COMMAND2) 2) Calibate VOUT_TRIM a. After trimming VOUT_SCALE_LOOP, set a new voltage and measure the real output voltage b. Adjust VOUT_TRIM i. VOUT_TRIM = VOUT_COMMAND – VOUT 3) Calibrate VOUT_CAL_GAIN a. Adjust VOUT_CAL_GAIN i. VOUT_CAL_GAIN = 1 – (READ_VOUT1-READ_VOUT2) / (VOUT1 – VOUT2) 4) Calibrate IOUT_CAL_GAIN a. Force 2 reference currents on the output and read READ_IOUT b. Adjust IOUT_CAL_GAIN i. IOUT_CAL_GAIN(trimed) = IOUT_CAL_GAIN(pre-trim) x (ILOAD1 – ILOAD2) / (READ_IOUT1 – READ_IOUT2) 5) Calibrate IOUT_CAL_OFFSET a. Force another reference current on the output b. Adjust IOUT_CAL_OFFSET i. IOUT_CAL_OFFSET = IOUT – READ_IOUT + +HI,David Daniels: In fact, I don't know what is meaning? This method is different which your colleague tell me. VOUT_CAL_GAIN = 100*[(Vout1-Vout2)/(Read_vout1-Read_vout2)-1]. + +liwei qi vout1 = 0.584V Vout2 = 4.88V Read_vout1 = 0.625V Read_vout2 = 5.07813V Based on this data, the READ_VOUT function is reporting a -4.45313V (READ_VOUT1 - READ_VOUT2) change when the output voltage is actually changing -4.296V (4.88 - 0.584V) so the READ_VOUT/VOUT ratio is -4.4513/-4.296 = 1.036576 1 - 1.036576 = -0.036576 or -3.6576%. With an LSB of 0.4, you'll write a value of -9 into the register to reduce all of the READ_VOUT values by 3.6%. READ_VOUT1 will become 0.6025 READ_VOUT2 will become 4.895317 That's still showing an 18mV offset error at 0.584V and a 3mV gain error over the 4.296V range, but you can see that the gain factor has been significantly improved by trimming the READ_VOUT gain. For the decimal value to be written into the VOUT_CAL_GAIN register: VOUT_CAL_GAIN (integer) = ROUND( 100 * ( [ 1 - (READ_VOUT1 - READ_VOUT2) / (VOUT1 - VOUT2) ] / 0.004) ) The converts from the decimal ratio of Delta READ_VOUT / Delta Vout to the LSB with step-size 0.4%. + +Using your equation and the values of your variables, i calculate -3.5%, Using my colleagues equation I get -0.036 or -3.6%. If I did the conversion correctly, write C409h to D5h will give a READ _ VOUT _ CAL _ GAIN of -3.6%. + diff --git a/data/text/DLP2/894934 b/data/text/DLP2/894934 new file mode 100644 index 0000000000000000000000000000000000000000..e0777505557625a1478aba2576bfc26e26a6aa57 --- /dev/null +++ b/data/text/DLP2/894934 @@ -0,0 +1,20 @@ +UCC28056: for 24V-AC input + +Part Number: UCC28056 Hello E2E, Our customer is considering that to use the UCC28056 for 24V-AC input power supply. Doescompany have any similar precedent for example of use? or cancompany introduce us to other recommended devices? The outline are following; : 24V-AC input is secondary side, final output power is 35V-DC/8A_max. : composition　 [24C-AC] -> [Ideal FET bridge(LM74670*4)] -> [PFC(UCC28xxx)] -> [DC/DC->35V] Regards, ACGUY + +Do you mean PFC for 24VAC input? Can you describe what is your input AC voltage and output DC voltage? + +The attached file is idea from customer,I think that it works fine. But, I have not conviction, so please let me know your suggestion. B.R ACGUY + +Its concept should be ok. But since the voltage is low the current becomes high for the same power. Even with close to 1 PF, its power losses will be high. Also for high current the size may become bigger. Not sure if this is a worth trying idea. But theoretically the idea can work. It is better to understand the benefit from this idea. + +Also, does the load require energy holdup - if so its PFC capacitance will be high. In short, you may ask your customer why doing this to move on. The IC should be ok to make control just it looks with high power losses and bigger PFC bulk capacitors which may make a bulky design. What is the frequency of AC100 to AC24, if 50 to 60Hz, the transformer will be "huge" comparing to one with high switching frequency. + +Hi, AC frequency is 50/60Hz, it's from general AC input voltage. If you designer, which will you choose DCM(QRM) or CCM for PFC? Please let me know your opinion. Regards, ACGUY + +You will need to try each to see which one is better and in terms of what you defined. As I am not understanding any benefit from this idea, I cannot provide my opinion as some criteria need to set up first before pick up what best to be. You need to tell me what benefit the design wants to achieve in order to see what to be the best or better trade-offs. This idea looks to me bulky and big, heavier, high cost, and more power losses. You need to ask why you need such a design and share it, before you ask opinions from others. + +Hi, I change the words for question. Do you know the PFC-controller that can operation on AC-24V input bycompany solution? Regards, ACGUY + +No we never have such an application and cannot comment. You need make research to get your own solution. + diff --git a/data/text/DLP2/894969 b/data/text/DLP2/894969 new file mode 100644 index 0000000000000000000000000000000000000000..c78305ae9ec5f0085e61927927ae57fd67f8b332 --- /dev/null +++ b/data/text/DLP2/894969 @@ -0,0 +1,16 @@ +BQ76940: BQ76940 to design the 15S BMS. I have one problem.cell 10,11,12,13 and 14 cell reading zero value + +Part Number: BQ76940 Dear Team I am using the BQ76940 to design the 15S BMS. I have one problem. We connected Cell 0 to 14 in series , through resistor divider networks series resistors of 100E (to work as cell simulator), VBAT=36V all cell are reading ok except cell 10,11,12,13 and 14 cell reading is sowing half of actual. it looks problem with 3rd bank of BQ IC. Two banks 1 & 2 (Group of 5 cell each bank ) of BQ is reading perfectly. We also connected TS1 , TS2, TS3 with 10K Resistors. it is not floating. Please let us know the solution. Thanks Devayani + +Hi Davayani, This is not a normal behavior, so I am not sure what would cause the issue you are seeing. There are a number of important connections in the schematic that can be a little tricky. I recommend going through this video to see if it helps reveal anything: /how-create-schematic-bq76920-bq76930-and-bq76940 After going through the video, let me know if you are still not able to find the issue. Best regards, Matt + +Dear Matt, Thanks for feedback. We have gone through video and verified all the connection as per guideline. We have connected battery pack with 12Cell configuration and now we are able to read cell voltage as expected except cell 11,12 and 13 - we are reading 0.7V instead of 3.3V. rest of all cell voltage we are able to read properly using micro controller i2C line. We have not turned on cell balancing yet. just we are reading cell voltage. Please let me know what will be the issue, We wanted to start production once this issue is resolved, we are really struggling to resolve this issue, Thanks, Devayani + +Hi Davayani, If you can send your schematic, I can check it for connection issues. As I said, this is not normal behavior for the device, so there is likely an issue causing the upper cell group to not report voltages correctly. Best regards, Matt + +Schematic Page-1.pdfSchematic Page-2.pdf Dear Matt, Please find attached schematic for your review. after review can you conclude like area of problem . Hardware side or software side any improvements etc.. Thanks, Devayani Bodar + +Hi Devayani, In your schematic it does not look like you are connecting unused cells as recommended by the datasheet. Please see Table 26 in the datasheet for how to connect a 12-cell application. Regards, Matt + +Dear Matt, We again verified connections as per your suggestions, now issue is resolved. Thanks, Devayani + diff --git a/data/text/DLP2/895075 b/data/text/DLP2/895075 new file mode 100644 index 0000000000000000000000000000000000000000..0741a2f1c40798231a58f1ac2836dab17f6881c3 --- /dev/null +++ b/data/text/DLP2/895075 @@ -0,0 +1,10 @@ +TPS7A85: Shottky Diode for reverse current protection + +Part Number: TPS7A85 Hi I would like to understand how to choose the shottky diode for reverse current protection: From the data sheet, there is a recommendation to use a shottky diode for reverse current protection: (Figure 57) /tool/TPS7A85EVM-754?keyMatch=TPS7A85%20&tisearch=Search-EN-everything&usecase=part-number I would like to know if there is a recommendation bycompany to such a diode (what they used in order to verify it). In the EVB: /lit/ug/sbvu029/sbvu029.pdf I didn’t find this implementation. Regards Omer + +Hi Omer, I would recommend picking a diode that can handle the worst-case peak current based on how much output capacitance you have at VOUT. The worst-case scenario for reverse current is when the regulator is actively regulating and the input voltage is suddenly shorted. I hope this helps. + +Dear John Meaning if I plan for a 4[A] maximum current from the LDO - the diode needs to have this limit as well? Regards Omer + +Hi Omer, No. The diode is only providing a path to discharge VOUT to VIN in the event that VIN is suddently shorted. Assuming you have a 47uF capacitor at COUT and VOUT is 3.3V, then the amount of energy stored on the capacitor is 1/2CV^2. or 255mW. if the load was drawing essential no power and VIN is shorted, this is the amount of energy that would be dissipated by the diode. In this case something like this could be sufficient. I hope this helps to clarify. + diff --git a/data/text/DLP2/895086 b/data/text/DLP2/895086 new file mode 100644 index 0000000000000000000000000000000000000000..9b5c3a0a8054c8080da2b7a4fe009641cb96b00c --- /dev/null +++ b/data/text/DLP2/895086 @@ -0,0 +1,18 @@ +BQ40Z80: Parameter setting : Enable permanent failures PF A . Why doescompany technical reference does not recommend Enable any of failure mode( QIM, OTF,COVL,SOT,SOC,SOCC,SOV,SUV) ? Is there an issue with the IC function? + +Part Number: BQ40Z80 Parameter setting : Enable permanent failures PF A . Why doescompany technical reference does not recommend Enable any of failure mode( QIM, OTF,COVL,SOT,SOC,SOCC,SOV,SUV) ? Is there an issue with the IC function? + +Hello Jim, Let me check with the folks that wrote the TRM. + +In the mean time, can you provide me which parameters you need or want to use? + +i want to use the SOV , SOCD and SOCC functions + +Hello JDo, The TRM recommends a 0 (default) value because this setting will blow a fuse. If a customer does not really mean to enable this feature without understanding how it works, then it adds more complexity if something does go wrong. + +Hi Kang, I understand there are two options to set the packs to a permanent failure mode and trigger the chemfuse if the condition meet ( ie.SOV safety over voltage occurred) . Could you go over a quick review of my settings before I release the design? I can send it directly to your email + +Hello Jim, I suggest testing/validation of the settings on your end in particular to system performance as these things often are hard to test by inspection of the gg file. Thanks + +Thanks Kang + diff --git a/data/text/DLP2/895117 b/data/text/DLP2/895117 new file mode 100644 index 0000000000000000000000000000000000000000..dcd6cb34d0e020d4358bd97adf87b51cfea8032d --- /dev/null +++ b/data/text/DLP2/895117 @@ -0,0 +1,20 @@ +HDC1080: Sample reading and setup + +Part Number: HDC1080 Hi I am currently using the HDC1080 and would like to know the following so i can optimise the best way of using it? 1. What is the purpose or correct way to use the heater? Is there away on power up to detect the necessity of heater ? Under what circumstance would we need to use it? 2. There is RST bit in the configuration what is the purpose of it? 3. Once a minute i am reading temperature/humidity sample. Is once sample reading enough, or should i be reading it multiple times within that minute for an average? As the output is digital data, i though averaging might not be necessary? 4. Can the size of GND plane or GND pour have any effect on the results. At times two device next to each other would have few degrees for temperature or % for humidity difference. Is this acceptable? If one the PCB is charging a PCB the sensor does show about 5-6 degree extra on that. 5. I manually soldered the IC using hot air, i then cleaned the board to remove all the flux. Can this effect the readings? Thank You Regards DJ + +Hi I have recently noticed that i was to take my unit from indoors to outdoors, the temperature starts increasing even though the temperature is much lower outside. Can condensation cause such effect? Thanks DJ + +Hi Dharmesh, Thank you for your post. Dharmesh Joshi 1. What is the purpose or correct way to use the heater? Is there away on power up to detect the necessity of heater ? Under what circumstance would we need to use it? The heater is used to drive condensate that builds up over time off of the device. You could apply the heater regularly (say briefly at startup), or use it conditionally if condensation is known to have occurred. Dharmesh Joshi 2. There is RST bit in the configuration what is the purpose of it? This triggers a soft reset of the device, restoring it to the default settings. You can also do this by switching the supply, but having a soft reset available is often more convenient. Dharmesh Joshi 3. Once a minute i am reading temperature/humidity sample. Is once sample reading enough, or should i be reading it multiple times within that minute for an average? As the output is digital data, i though averaging might not be necessary? That depends largely on your application. You don't need to average to meet the datasheet specifications of the device, so in general I would say not to bother averaging the readings. It may be true that you see smoother "jumps" in the returned data if you choose to average it, but that doesn't necessarily mean the returned data is more accurate. Dharmesh Joshi 4. Can the size of GND plane or GND pour have any effect on the results. At times two device next to each other would have few degrees for temperature or % for humidity difference. Is this acceptable? If one the PCB is charging a PCB the sensor does show about 5-6 degree extra on that. It makes sense that your charging PCB would be hotter. When not charging, the difference you are observing is not uncommon. There is likely to be some difference in temperature between two boards even if they are in close proximity to each other. This difference will likely reduce in a chamber, and would be even smaller in an oilbath. When in open air, things like handling the boards, and the presence of air currents can account for these differences. Dharmesh Joshi 5. I manually soldered the IC using hot air, i then cleaned the board to remove all the flux. Can this effect the readings? A hot air reflow isn't generally an issue, but no-clean flux should be used for the HDC part. Flux cleaners are likely to affect the humidity readings. You can see our guidance on assembly and handling here: /support/sensors/f/1023/t/879064. Dharmesh Joshi I have recently noticed that i was to take my unit from indoors to outdoors, the temperature starts increasing even though the temperature is much lower outside. Can condensation cause such effect? Condensation could have this effect if it was causing the board to draw more power via a short, but I wouldn't expect it as a rule of thumb. If the device was in direct contact with condensation than the effects would be somewhat unpredictable. If you were recently handling the board and device, body heat could also be the culprit. Please let me know if you have any additional questions. Best Regards, Brandon Fisher + +Dear Brandon Thank You for your reply, very sorry for that late response. Is there away to work out when to use the heater? We would prefer to do this automatically,but can always allow users to manually send a command to the PCB to start it. What would be the max duration? RST makes sense now, its purpose is to set it back to the default reg values. I presume if you know the default values then this RST bit would not really be required? Once the Rst bit is set do you need to release it to stop any further resets from happening? I will keep my sample to once a minute. When a board is charging the difference to another board close it it is about 3.8 degrees The aim is the measure atmosphere temperature/ humidity for agriculture/green houses. Does it make a difference if sensor is on the PCB inside an enclosure or another PCB hanging outside the enclosure? What is the difference between HDC1080 and HDC 2080? Is there more superior IC to use for my application ?. In regards to taking my device in the outdoors i released that my enclosure top is clear, and was causing the temperature to rise, so it was not caused by condensation. In regards condensation , could it be possible that an issue would arise if during the day time it was hot and during the night temperature were to drop? + +Hi Dharmesh, This thread provides some guidance on how to use the heater of the HDC1080. The max duration would depend on multiple factors for the HDC1080, because the heater only actually runs during conversion. Typically this would be very long. Dharmesh Joshi RST makes sense now, its purpose is to set it back to the default reg values. I presume if you know the default values then this RST bit would not really be required? Once the Rst bit is set do you need to release it to stop any further resets from happening? You don't have to use the soft reset bit ever if you don't want to, and the reset bit will not trigger multiple resets, it will simply return to 0 after the reset is performed. Dharmesh Joshi The aim is the measure atmosphere temperature/ humidity for agriculture/green houses. Does it make a difference if sensor is on the PCB inside an enclosure or another PCB hanging outside the enclosure? You typically do not want the PCB with the HDC device sitting entirely exposed, inside a case is better. That case should have some ventilation to allow for exchange of air between the ambient environment and the inside of the case. Dharmesh Joshi What is the difference between HDC1080 and HDC 2080? Is there more superior IC to use for my application ?. I would only use the HDC1080 if you need to operate at 5V, otherwise I would recommend using the HDC2080. The HDC2080 is newer and has better performance. Dharmesh Joshi In regards to taking my device in the outdoors i released that my enclosure top is clear, and was causing the temperature to rise, so it was not caused by condensation. That makes sense, I hadn't considered that as a possibility, but good catch. Dharmesh Joshi In regards condensation , could it be possible that an issue would arise if during the day time it was hot and during the night temperature were to drop? Yes, it is possible for condensation to occur due to day/night temperature cycles. You might have to consider designing with the HDC2021, and doing a board conformal coating if you can't reliably prevent condensation in your environment. Conformal coating will protect the rest of your board from moisture Please let me know if you have any more questions. Best Regards, Brandon Fisher + +Hi Brendon I am using the hdc1080 with 3.3v, what effect would that have? I am also working on a N02 gas sensor that also needs to monitor temperature near the sensor. Could these sensors be ok or would a pt1000 be better as I would need about 5cm wiring. How many hdc2021 can I connect on one i2c bus? + +Hi Dharmesh, The HDC1080 will be fine with 3.3V, but I typically recommend the HDC20XX family of sensors since they are newer, and have better RH accuracy. If you just need the temperature sensing element this sensor would be fine. I can't guarantee that the RH sensor wouldn't be affected by anything else in your application environment, the only way to test that may be to take an EVM and try it out. 5 cm of cable also shouldn't be an issue with an I2C sensor provided you don't have any large unusual sources of capacitance on the bus. Dharmesh Joshi How many hdc2021 can I connect on one i2c bus? You could use 2 HDC2021's without additional hardware. If you wanted more than two you would need to use an I2C Mux or a separate I2C channel to avoid address overlap. Best Regards, Brandon Fisher + +Hi Brandon Thanks We will use HDC2021 for all new designs, how does this differ to the HDC2080? Is it possible to have samples of HDC2021 ? As it seems to be a very new. We would also use HDC2021 for all new production runs for all old PCB designs, this way we only need to purchase HDC2021. I believe the firmware would be identical subject to the HDC1080? And would be pin compatible as my old boards have pin 3 and 4 not connected to anything? + +Dharmesh - The HDC2021 is basically the same as the HDC2080 from a pinout and firmware perspective. This device has a removable tape cover and the opening in the device was moved to the center, to allow the tape to adhere to the package. The preview product page for the HDC2021 is here: /product/HDC2021 and from here on that page you can either request samples (middle of the row) or order some (red button on the left in that row) /product/HDC2021#order-quality The firmware is not the same as the HDC1080, Please see this FAQ post which covers this topic in detail /support/sensors/f/1023/t/878712 The board layout for the HDC1080 will support the HDC20xx devices, as the pins 3 and 4 are no connects for the HDC1080 and the three parts (HDC1080, HDC2080 and HDC2021) have same default I2C address, however, if you have the opportunity to update your board at some point, you could connect pin 4 to interruptible GPIO on your MCU, to take advantage of the DRDY/INT feature the newer parts add. + diff --git a/data/text/DLP2/895133 b/data/text/DLP2/895133 new file mode 100644 index 0000000000000000000000000000000000000000..d03593a774424bb80b85542ecec5aa86fcc76124 --- /dev/null +++ b/data/text/DLP2/895133 @@ -0,0 +1,10 @@ +TLV62090: Internal capacitance between FB and VOS + +Part Number: TLV62090 Hello, I will use this product for DC voltage converter. Is there internal capacitance between FB and VOS? If so, would you tell me that capacity? Best regards, Kenichi + +Hi Kenichi, I am not sure if there is any physical capacitor connected between the two pins. Any valuable information that is not confidential can be found in the datasheet. Based on the block diagram below, I do not see any capacitor connected between the pins. Can you share the reason why you ask? I might be able to help further. Thanks, Zain Riaz + +Hi Zain Riaz, Thank you for your reply. An abnormal output problem has occurred due to the mismatch between the internal capacitance and the external resistance with other company 's power IC. Other company 's IC has internal capacitance by design. So we wanted to know that. Regards, Kenichi + +Hi Kenichi, Thanks for sharing the information. If you like I can look at the schematic diagram and any waveforms that show the output problem. Looking forward to your reply. Best Regards, Zain + diff --git a/data/text/DLP2/895140 b/data/text/DLP2/895140 new file mode 100644 index 0000000000000000000000000000000000000000..1acecfe3c2cf9a76521bd92a1bdd78de1412c2b5 --- /dev/null +++ b/data/text/DLP2/895140 @@ -0,0 +1,6 @@ +[FAQ] What are the differences between ISO5851, ISO5852S, ISO5451 and ISO5452? + +Part Number: ISO5851, ISO5852S, ISO5451, ISO5452 What are the differences between ISO5851, ISO5852S, ISO5451, and ISO5452? For what applications do the different features matter? + +What are the Shared Features? ISO5451, ISO5452, ISO5851, ISO5852S are a family of single-channel isolated gate drivers targeting IGBT & SiC applications. They are also offered in AEC-Q100 qualified variants. These devices are 2.5A/5A single channel isolated gate drivers with 5.7kVrms reinforced isolation Their shared feature set includes: DESAT protection w/ Fault alarm Miller clamp Output Short-circuit clamp Input & Output UVLO w/ “Power Good” ready indication How do the differences affect my choice? The specification differences are detailed in the table below. ISO5451 ISO5452 ISO5851 ISO5852S Output type Single Split-outputs Single Split-outputs VIORM Max Repetitive Peak voltage 1420 VPK 2121 VPK VIOWM Max Working Voltage 1420 VDC 2121 VDC 1000 VRMS 1500 VRMS VIOTM Max Transient Isolation Voltage 8000 VPK VIOSM Max Surge Isolation Voltage 6250 VPK 8000 VPK Minimum CMTI 50-kV/μs 100-kV/μs Soft turn-off on DESAT Detection No Yes No Yes AEC-Q100 Available Yes Split Outputs ISO5852S and ISO5452 split the turn-on and turn-off paths while ISO5451 and ISO5851 are single-output drivers. With split outputs, separate external gate resistors can be used for each path without requiring the addition of a diode. This feature is especially beneficial for driving SiC FETs. Isolation Ratings ISO5851 & ISO5852S are rated to withstand higher working and repetitive peak voltages than ISO5451 & ISO5452. The choice depends on the bus voltage in the system. CMTI CMTI is an important parameter that affects every switching cycle. ISO5851 and ISO5852S are High-CMTI rated >100kV/us. This effectively increases resiliency against large dv/dt transients caused by hard switching. Soft turn-off ISO5452 & ISO5852S have STO on DESAT detection. During a short-circuit event, fast turn-off of the IGBT can cause a spike in VCE due to parasitic inductances. This VCE transient can be large enough to cause failure of the IGBT. STO “softly” pulls the gate low over 2us to prevent damage. STO is most effective when driving high-power IGBTs with longer short circuit withstand times Additional Resources: SiC & IGBT Gate Driver Fundamentals Intro to Isolation Ratings & Standards + diff --git a/data/text/DLP2/895164 b/data/text/DLP2/895164 new file mode 100644 index 0000000000000000000000000000000000000000..993eec6a88ac6185c331d5d9752d8b8925350fb8 --- /dev/null +++ b/data/text/DLP2/895164 @@ -0,0 +1,24 @@ +UCC28251: Minimum on time and EN control discussion + +Part Number: UCC28251 Hi team, My customer whas two questions about this device, 1.Do we have some solution to use external circuit to limit UCC28251 minimum on time? They want to limit the minimu on time to 500ns. 2. When customer want to turn off this IC in OCP event, they pull down EN and SS pin, SS pin connect BC817 to GND. But they can still detect PWM signal. Do you think what is the root cause? Yellow: SS pink: PWM Output Thanks. BR, CL + +Hi Charles， I will reply to you tomorrow. —— Teng + +Hi Teng, Do you have any updates about this question? Thanks. BR, CL + +Hi Charles, Sorry I don't have such circuit that can limit the minimum on-time less than 500 ns. It is very strange why PWM still has output when SS pin is pulled to ground. Can you test that will the controller shout down when pulling SS pin to ground externally during normal operation. Regards, Teng + +Hi Feng, This waveform is tested during normal operation. And I saw there is another thread below may have the same issue. Could you please help explain more? Thanks. BR, CL + +Hi Feng, Could you please help share some of your comments here? This is urgent case for my customer. Thanks. BR, CL + +Hi Feng, I do not see any response to this problem. Would appreciate it if you can share your comments by April 20th. Thanks. BR, CL + +Hi Charles, Sorry for the delay, since I just received the EVM. See the attached oscilloscope picture I tested by shorting SS to ground directly on the EVM, it shows pulling SS to ground can disable device and terminate PWM immediately. Could you advice customer try to shorting SS ground directly and share me the schematic at teng-feng@ Besides, the device can also be disabled by controlling EN pin. + +Hi Teng, Thank you for your response here. Customer cannot share schematic to us, for this is confidential information for them. They still have two questions about this device, 1. Do you pull EN pin to GND when you pull down the SS signal in the waveform you shared here? 2. Why output is not in the max duty in the SS stage? For COMP voltage is higher than RAMP here. CH1 COMP; CH2 RAMP; CH3 OUTPUT; BR, CL + +Hi Charles, 1./ I only pulled the SS pin to ground in the testing. Could customer try to short SS pin to ground directly? and they can only share a part of schematic. 2./ we can find there is an internal voltage offset at RAMP/CS pin from the block diagram. Regards, Teng + +Hi Teng, Thank you for your response here. 1.See SS control circuit from customer. Customer redo the test again, and they found that when pull down SS pin ,the output will be zero after 58ms. Do you have some explanation about this waveform? 2. What is the internal voltage offset value? I cannot find it in our datasheet. Thanks. BR, CL + diff --git a/data/text/DLP2/895167 b/data/text/DLP2/895167 new file mode 100644 index 0000000000000000000000000000000000000000..58f6d2b8c0af4bb3879e9f580a201127ad6a98d9 --- /dev/null +++ b/data/text/DLP2/895167 @@ -0,0 +1,24 @@ +BQ34Z100: BQ34Z100 + +Part Number: BQ34Z100 1. I test the voltage,when VCC is 3.3V,then REGIN is 2.1V,but BQ34Z100 need 2.7~4.5V for REGIN, BQ34Z100 does't work. Could I delete R75,D13 and Q15 ? 2. The same I2C line is pulled up to 3.3V, will it impact BQ34Z100 communicate through EV2400 to computer? + +There is no need to add mosfet between VCC and REGIN ,3.3V VCC is the same as 1-cell voltage,is it right? + +1. I test the voltage,when VCC is 3.3V,then REGIN is 2.1V,but BQ34Z100 need 2.7~4.5V for REGIN, BQ34Z100 does't work. Could I delete R75,D13 and Q15 ? Can you share your latest schematic? 2. The same I2C line is pulled up to 3.3V, will it impact BQ34Z100 communicate through EV2400 to computer? It should not. Have you seen any issues? Andy + + + +Here the consumption current into REGIN is too much. When B7-B- voltage is 25V, VCC-B- is 3.3V, the consumption current into REGIN is 2.5mA and it will always be so much. + +Hi, You mean you already remove the R75,D13 and Q15, and test the REGIN is 2.1V, consumption current is 2.5mA? Thanks. Best regards Mason + +remove the R75,D13 and Q15, and test the REGIN is 3.3V, consumption current is 2.5mA It's so big that I have to delete BQ34Z100 and use other solution to solve my trouble. + +Hi, How did you measure the consumption current? By the pull-up resistor? Best regards Mason + +YES + +Can we get a scope capture of the current waveform across that resistor? Is this a continuous 2 mA? + +Hi, We would recommend you to remove the R55, When VEN output low, there will be a voltage drop on R55. That might cause current up to 2.5mA. Thanks. Best regards Mason + diff --git a/data/text/DLP2/895325 b/data/text/DLP2/895325 new file mode 100644 index 0000000000000000000000000000000000000000..0869e8e6f56b4ac788c22ee585182362a9219510 --- /dev/null +++ b/data/text/DLP2/895325 @@ -0,0 +1,22 @@ +BQ40Z60EVM-578: Charging with BQ40Z60 does not working + +Part Number: BQ40Z60EVM-578 Hi there, Steps that i have done: choose the chemID 2059 for INR18650MJ1 configure the "Data Memory" run the "Calibration" – Current Calibration and Voltage Calibration, Temperature Calibration was not done start a "Learning Cycle" DISCHARGING when "Learning Cycle" was started -> press GAUGE_EN and RESET at "Commands" view, so that QEN = high/red and RDIS = high/red start discharging DC load relaxing after discharging or wait until REST = high/red I'm performing a learning cycle with a batterypack (2S2P of INR18650MJ1 chemid 2059) and it seems that step 4. a. - DISCHARGING was succesfully (but something strange happens – while Discharging NSFM was high/red in IT Status (low) register). Now the learning cycle says "Charge Mode - Connect charger now.", so i connect my lab power supply (9V@3,4A) and the message does not changed. Then i'm looked at the "DashBoard" and see there is no current flowing. The "Registers" view show that the bit ACLW at "Operation Status A" Register is high/red. After changing the voltage at 9,7V the bit ACLW at "Operation Status A" Register is low/green and the ACFET is high/red, the bit CHGR at "Charger Status" register change from low/green to high/red. At the "Registers" view i'm observing that the "AC Adapter voltage" is 6149mV. 1. Question: What does NSFM or Negative Ra Scale Factor Mode mean? Was step 4. a. successfully? 2. Question: Why the gauge does not charge the batterypack? Is the data memory not configured properly? Could someone help me please? here a screenshot and some data Data-Memory-Config.gg.csv RegisterLogFolder.zip DataMemoryLogFolder.zip kind regards and thanks + +Your log file shows that Vacp is erratic when you try to charge. The gauge will only allow charging if Vacp > (vBAT + VacpHysteresis). VacpHysteresis is 0mV by default so you must make sure the Vacp > vBAT and that it stays above vBAT. + +The learning cycle has two modes, which are Manual Mode or Automation Mode? Have you tried the Manual Mode? Andy + +I'm using the manual mode. + +The erratic voltage is my debt. Should i measure the voltage between VSYS to PGND or between the psu voltage for calibrating the "Applied Pack Voltage"? When i'm using the voltage displayed on my psu for calibrating the voltage corresponds to the "Registers" view (AC Adapter voltage). When i'm using the voltage between VSYS to PGND the voltage is different from the psu one. + +See 3.3.1 Voltage Calibration of bq40z60 EVM user's guide. I would suggest you follow the instructions there. Andy + +I followed the instructions of the document SLUUB71, but without any successful result. thanks for your response Riccardo + +Which register should be set of the gauge, when the gauge is charging? Could I start manually a charging cycle? + +The gauge indicates with ChargerStatus() CHRG that the charger is enabled. ChargingStatus() gives you clues what is currently happening with the charger. If the AC FET is on and you apply a voltage that is high enough for charging to ACP/VAC and all conditions for charging (CHG FET is on, all protection parameters are ok) then the bq40z60 will charge the cells. There is no need to manually start this. + +Thank you very much for your answer. This does not solve the problem. I have now loaded an old configuration with different parameters and charging works now, but I can not understand why? I have specifically changed the values in "Advanced Charge Algorithm" in the subsection "Voltage Range" and "Charger" and set the bit in SOC Flag Config A & B for TC and FC this seems that does the job. But the termination of the charging process seems not to work correctly and the "VCT" bit of the "Charging Status(low)" register is not set. It toggles between charge and charging termination. Is that a normal behaviour? The datasheet "bq40z60 Programmable Battery Pack Manager Technical Reference Manual Literature Number: SLUUA04D" says that the condition is: All of the following conditions must occur for two consecutive 40-s periods: Charging (that is, BatteryStatus[DSG] = 0) AND AverageCurrent() < Charge Term Taper Current AND Max cell voltage1..4 + Charge Term Voltage ≥ ChargingVoltage() / number of cells in series AND The accumulated change in capacity > 0.25 mAh. Then there is an other problem that in "Safety Alert C+D(low)" the OC bit is set. Which parameter is responsible for the "OC" bit? Finally, my working configuration for which it is of interest. Data-Memory-Config-working.gg.csv old one: Data-Memory-Config-old.gg.csv + diff --git a/data/text/DLP2/895343 b/data/text/DLP2/895343 new file mode 100644 index 0000000000000000000000000000000000000000..1955eac8f16ef63d01bdca8bb0e1dcd00382ca45 --- /dev/null +++ b/data/text/DLP2/895343 @@ -0,0 +1,8 @@ +TPS54560: the selection of inductor saturation current + +Part Number: TPS54560 Hello E2E, I would like to consult how to correct to select the inductor's saturation current. The OCP of TPS54560 is fixed. Assume the maximum load current is just 1.5A and due to PCB size limitation, could user use the lower saturation current than OCP but higher than maximum current rating? Jason + +It is always best to design the inductor for the current limit of the device. However, it is OK to use an inductor with a saturation current less than the current limit. Some inductors have a very hard saturation characteristic. That means that the inductance will drop to a very low value when saturation is reached. That kind of inductor should be avoided. Most inductors will exhibit a gradual drop in inductance as saturation is approached. I would use one of these. If you need 1.5A of load, I would look for an inductor rated for at least 2A of rated current. Then find one with the highest saturation current that will fit on your PCB. The larger the current rating, the lower will be the resistance and the better will be your efficiency. If all you need is 1.5A of load, you may want to use a regulator with lower current capability. + +Hello I will close this post due to inactivity. Thanks + diff --git a/data/text/DLP2/895371 b/data/text/DLP2/895371 new file mode 100644 index 0000000000000000000000000000000000000000..5c708b2e33c834d6d0be4d8adbfc16ae6cba347f --- /dev/null +++ b/data/text/DLP2/895371 @@ -0,0 +1,14 @@ +UCC28711: Intermittent operation of Flyback Converter + +Part Number: UCC28711 Hello, I designed a flyback converter using the UCC28711. The DC input voltage ranges from 150V-1000V. And the output voltage consists of 2 outputs of 17V each. Unfortunately, the circuit does not respond as expected. In particular, the constant voltage regulation does not stop on the desired voltage. Even though, the calculations of Rs1 & Rs2 are correct (the voltage on Vs is 4.05 when the output voltage is 17V), the IC keeps charging the output until 22V, then it stops and when the output discharges to 10V in starts charging again until it reaches 23V. At this point the overvoltage protection is activated and the IC swithces off, until Vdd reaches the Vdd turn-off threshold (8.1V). Then, the process starts again with the aforementioned pattern. Is it possible that the problems occur because the NTC pin is left floating? Can the ripple on the Vauxiliary create confusion to the Vs pin during the sampling time? The following pdf files include the waveforms of the converter: Blue=Vdd pin-Channel A Red=DRV pin-Channel B Green=Vauxiliary-Channel C Yellow=Output Voltage-Channel D The file ti1 presents the waveforms of the above measured signals. At 1.712ms is the point where the IC detects the overvoltage, even though it reaches the desired regulated voltage at 0.462ms The file ti2 presents the same waveforms but zoomed in to the moment where the output voltage reaches 17V. I would liek to hear your opinion regarding the shape of Vauxiliary (Green) and how it can affect the sampling of the Vs pin. ti1.pdfti2.pdf Thanks in advance. + +Gerasimos If you are not using NTC pin function we recommend to leave it floating as you have already done. If you have not already, we recommend you use the excel design calculator /lit/zip/sluc590 to verify that all the external components in your design are correct. Please note that for VS pin measurement we don't recommend probing the pin directly. We recommend that you measure the aux winding voltage. The parasitic capacitance on a probe can interfere with operation if directly connected to VS pin. From your waveforms it looks like the waveform that the VS pin is measuring looks to be incorrect. The waveform should look like figure 14 (page 13) of the UCC28711 datasheet. The turn on point is not always on the valley as expected, and instead varies from cycle to cycle. Below are a few recommendations to improve VS waveform among others. It is recommended to have <4pF of capacitance on VS pin. Remove any external capacitor if there is one. Verify that the transformer design follows best recommended practice for multiple output, coupling thru - see details in this video /multiple-output-flybacks-how-improve-cross-regulation?context=1134585-1139235-1134623 Verify that layout follows recommendation in section 11.2 (page 25) of the UCC28711 datasheet. If it does not noise can be injected into the key nodes which will interfere with operation. Increase output capacitance - there may be insufficient output capacitance which is causing the output voltage to overshoot Best Regards, Eric + +Dear Eric, Thank you for your quick reply. I do not measure the Vs pin. I measure the Anode of the Auxiliary winding diode (Vauxiliary-Green). In the file ti2.pdf that I sent you can see that there is something weird with the Vauxiliary (Green). In particular, various oscillations take place after the switch-off of the mosfet. Have you ever seen something similar? Best Regards. + +Gerasimos Thank you for clarifying how you measured VS waveform. Vauxiliary waveform does not look correct. It should look like Figure 14 (page 13) of the UCC28711 datasheet. The turn on point does not track the valley. Typically distortion such as this is caused by excessive leakage inductance in the transformer or layout error that injects excessive noise. If you continue to have issues with your design, we recommend that you use an RCD snubber instead of a Zener clamp (this app note has details on how to design the clamp /lit/an/snva744/snva744.pdf). I recommend you verify your design using the steps I highlighted earlier to identify what is causing this signal to be distorted. If you cannot resolve the issue, please share your schematic and PCB layout. Best Regards, Eric + +Dear Eric, Thank you for your usefull advices so far. I changed the snubber circuit to RC snubber (previously it was Diode-Zener), and there was some progress. Specifically, when I changed the ultrafast diode of the snubber to a standard, the chip stopped guiding the converter to output overvoltage which led to switch-off until the undervoltage lockout of 8V in Vdd and then switching on again through the HV pin. Nevertheless, now I face different problems. In particular, as you can see in the files that I have attached, when the output reaches the desirable limit (18V) the IC stops regulating for a long period. In the meantime the output discharges a lot. Some times it discharges to 16V, others to 13V and some others even lower to 7.68V, without any particular pattern. Have you ever faced a similar problem? The following files include the waveforms : Blue: Vdd Red: IC driver pin (DRV) Green: Voltage on the auxilliary winding, on the anode of the auxiliary winding diode Yellow: Output voltage As you can observe in the first file, the IC sends pulses until the voltage reaches the desirable value of 18V. Then it stops for along period, usually until the voltage goes to 8V. It is clear that the there is no OverVoltage Protection, since the Vdd is not let to discharge until the Undervoltage lockout of 8V, restarting the HV circuit. 4331.ti1.pdf The secomd file presents the same waveforms as the first file, but in more detail, zooming in. 0777.ti2.pdf Thanks in advance for your time and your useful advices. + +Gerasimos In your zoomed in waveform from the file "0777.ti2.pdf" it is not zoomed in enough to verify that the aux winding signal is now correct. In the earlier waveform you shared the turn on point is not always on the valley as expected, and instead varies from cycle to cycle. This is incorrect, it should look like figure 14 (page 13) of the UCC28711 datasheet. If the waveform is incorrect, UCC28711 may think the output voltage is at a different point than it is actually at, which may cause the improper behavior that you are seeing. Another recommendation is to verify that you have sufficient output capacitance. Generally we recommend 100uF/W of capacitance to insure stability Best Regards, Eric + diff --git a/data/text/DLP2/895384 b/data/text/DLP2/895384 new file mode 100644 index 0000000000000000000000000000000000000000..3fccae747294eda68b6f9c537f59737fcf9a07d1 --- /dev/null +++ b/data/text/DLP2/895384 @@ -0,0 +1,24 @@ +TPS54160: Desired output voltage not reached at no load + +Part Number: TPS54160 Hello everybody, i hope this further question will be linked to the original thread. I tried the Additional solutions (1-4) from chapter 4 of the recommended document "SLVA547A". I used a Schottky-Diode BAT54. For Solution (3) I tried different capacitors from 100 nF up to 1 uF. But the output voltage still looks like a sawtooth when input voltage is less than about 5 V. So is there another possibility to reach input voltage down to 3.5 V? Best regards, Alexander + +It may not be possible to get to such a low drop-out with this device. I would suggest using one of our synchronous devices (those without a diode). Those devices will be able to get down to lower input voltages. You might look at LMR33630 or LMR23630 or one of the members of those families. + +Hey Frank, thank you for your reply. So the datasheet says that Input Voltage range is from 3.5 V to 60 V. Which conditions are needed to reach 3.5 V input voltage? Best regards, Alexander + +That lower voltage in that specification indicates the voltage at which the device will still be switching and will not shut itself off. The higher voltage in that specification indicates the voltage at which the device will be switching and will not be damaged. The specification does not imply that every application will run satisfactorily within that entire range. As an example, if you were to convert from 36Vin to 1Vout, most devices would either automatically reduce the switching frequency or skip pulses to remain in regulation. The data sheet of any given device will explain the limitations for a particular input, output and load combination. + +Hello Frank, would you please be so kind and tell me where I can find this explanation in the datasheet. So far I didn´t understand which specific factor is responsible that the actual design is not working. Figure 26 describes the minimum current needed to Start which is about 6 mA at 4V. But I cannot get lower than 4.9 V. The actual design needs output current of minimum 35 mA (intense oscillation) in case of failure. Best regards, Alexander + +Hello When converting from 3.5Vin to 3.3Vout, the device is in drop-out mode. In this mode the duty cycle = D = Vout/Vin is about 0.94; or very close to 1. Under these conditions the parameters of interest are the "maximum duty cycle" or sometimes called the "maximum on-time" or "minimum off-time". With our older devices, these specifications are sometimes not included in the data sheet; such as the TPS54160. Most of our newer devices will include these specifications to make it easier to determine the drop-out behavior. You can approximate the minimum input voltage by: Vin=Vout/Dmax. Where Dmax will come from the data sheet or Dmax=Tonmax*Frequency; where Tonmax also comes from the data sheet. The minimum input voltage will also depend on the load and the resistance of the inductor and of the MOSFET switches. Of course the minimum input voltage can not be lower than the minimum input voltage specification in the "operating conditions" of the data sheet. I can provide a spread sheet that will help to calculate the minimum input voltage for a given device and operating conditions if you wish. Thanks + +Hello Frank, thank you for the explanation. Would you please send me the spread sheet to calculate minimum input voltage? Best regards, Alexander + +Hello I have attached. Please keep in mind that the calculations are approximate. The best way to ensure that you get the performance you need is by testing. Thanks 8004.Drop_out_calc_revA.xlsx + +Thanks for the document. The regulator can provide 100% duty cycle, but when Vin is below 5V, the voltage at Boot-Capacitor still looks like the voltage in attached picture. Due to the calculation sheet, the 3.5 V input voltage are possible (Drop-out voltage = 0,2 V). I cannot find the parameter "Toffmin" in the datasheet, so I used D = 1. Is there anything else what we can do or check to get this regulator working below 5V Vin? + +Hello Since the regulator you are using has a diode, it will be very difficult to get to near 100% duty cycle. As mentioned previously, I would choose a synchronous type of regulator that can get closer to 100% duty for improved drop-out performance. Thanks + +Hello I will close this post due to inactivity. Thanks + diff --git a/data/text/DLP2/895427 b/data/text/DLP2/895427 new file mode 100644 index 0000000000000000000000000000000000000000..7ae9f30149be3e3c04e2075e4e99d5ce20699e2c --- /dev/null +++ b/data/text/DLP2/895427 @@ -0,0 +1,16 @@ +LM25576: Unable to change output voltage regardless of feedback + +Part Number: LM25576 Hello, I am trying to adjust the output voltage of the LM25576, circuit attached. It runs off +/-16V, and boosts up to a high voltage, however the regulator main output needs to be 12V Unfortunately the output is fixed to around 5.6-5.9V no matter how much I change the feedback voltage divider. HV SMPS0.4.pdf Have I done something stupid? Thanks in advance Charlie + +It looks like you are trying to convert +16V to a -16V using the LM25576 as an inverting buck boost; true? You also have some kind of charge pump on the switch. Your FB divder is set to give an output of 6.95V=1.22*(1+4.7K/1k) You will need 16V=1.22(1+12.1K/1k) + +Hello, Sorry the schematic was not very well labelled. The regulator is referenced to -16V, so I am trying to get -4V from +16V (+12V referenced to -16V). The attached was my original design that I used to make 6V output, but just wanted to increase this. The circuit off the switch creates a HV 1mA supply for a tube. However, no matter what feedback resistor I put into the circuit, the regulator output is always around 5.5-6V. I tried values all the way up to 20K and there was no change. I guess if there is nothing essentially wrong with the topology I must have done something wrong with the build or PCB...? Thanks for your help. + +I would double check you values with the calculator tool on thecompany website. And also check your PCB layout. If you are still having trouble you could temporarily disconnect the charge pump and see if that changes anything. + +Hello I am closing this post due to inactivity. Thanks + +Hello, The issue was with my build. I used a 1000uF cap instead of the 470uF I planned to as the initial load of the regulator. I checked in the datasheet and didn't see anything about a maximum load capacitance, did I miss something? Thanks for your help + +Hello Thanks for the update. I don't think that the maximum output capacitance is explicitly stated in the data sheet. However, 1000uF is a bit large for most DC/DC converters. Thanks + diff --git a/data/text/DLP2/895515 b/data/text/DLP2/895515 new file mode 100644 index 0000000000000000000000000000000000000000..4c813cfb160bf77823aa5cd99895bddd04f026a8 --- /dev/null +++ b/data/text/DLP2/895515 @@ -0,0 +1,22 @@ +Suggestion on dual power source design + +Hi I am now developing a system as the following figure, and the slave device part is what I am doing right now. The slave device has a battery and could operate as a standalone device on its own. The load electronics(MCU, Sensor, etc.) need 3.3v and 5v, so I use two regulators to have these two voltage supply. The slave device could also connect to a host device. With different host devices, the host device could possibly provide 3v or 5v. I would like to use the power provided by the host device while connected to share the current of the load system to extend the battery life of the slave device. Could I naively connect the outputs of TPS63030 and TPS62291 together? Thanks in advance. + +Hi Jay, I would not recommend it, since both devices can sink the output current and operate in reverse, if they start fighting for control. The safest way would be to add ideal diodes. Or a switch on the TPS62291 output at least. When disabled, the TPS63030 disconnects the output from the input, which might not be the case for the TPS62291. Best regards, Milos + +Hi Milos, I added two LM66100 to the power block as the following figure: Does it inline with what you suggested? Will the output of two LM66100 still be 3.3V? Would it effectively share the current load between the two 3.3v supply? Thanks a lot. + +Milos, Generally it is not advised to use the LM66100 in a dual ORing configuration like then when both of the supply voltages are the same. The LM66100 is a make-before-break topology so if both supply voltages are the same there is a chance that the outputs will switch rapidly or both will be off. In this use case a power mux like the TPS2121 in a seamless switchover mode would likely be the better fit. See the below diagram taken from the datasheet: There is also a really goodcompany design that explains a good switchover example similar to your scenario .cn/cn/lit/ug/tidue50/tidue50.pdf + +Hi Timothy, Thank you for the correction! Best regards, Milos + +Hi Milos, Yes, the TPS62291 device does not have a reverse current protection feature. The simple diode will help to protect to eliminate the reverse current here. Best regards, Tanvee + +Hi Timothy, Thanks for sharing the solution. One little question that TPS2121 is a power mux, it should only use one input source at a time. Will it help to balance and share the current load between two input sources? Thanks in advance. + +Jay Yeh, Maybe I am misunderstanding the application here- however the way the LM66100s are setup in the original diagram was an ORing configuration where only one supply was present at a time. The TPS2121 will be a similar operation where there is one primary supply and then the other auxillary supply is switched to once the primary supply falls below a certain voltage range. No supply balancing is done here. + +Hi Timothy, Any suggestion on the system design if the goal is to have load sharing? Thanks in advance. + +Jay Yeh, I have moved this over to the load sharing forum and one of the engineers that work on our load sharing controllers may be able to give a suggestion. + diff --git a/data/text/DLP2/895593 b/data/text/DLP2/895593 new file mode 100644 index 0000000000000000000000000000000000000000..413e45b6ddea9bfc55a76652d05826f3d2fd69de --- /dev/null +++ b/data/text/DLP2/895593 @@ -0,0 +1,8 @@ +TPSM53602: Output voltage 1.1V or 1.2V + +Part Number: TPSM53602 Hi team, I get a WEBENCH alert at following configuration: Vin 4.1V -5.5V Vout 1.2V (or 1.1V) Iout 1A WEBENCH Power Designer reports:The TPSM53602 device may not be stable when operating under PFM Mode With Iout = 2A: I get the WEBENCH message that the design cannot be created: Your preferred device does not work with the inputs you selected. This design is not stable due phase margin either smaller than 35 or greater than 120. But according to the data sheet, this configuration should work, right? (With TPSM53603 I get the same messages) Best Regards + +Hi Dieter, The datasheet has lab measurements using the EVM for 5V input / 1V output. In your design conditions you are running between 4.1V - 5V. If you were to change the Vin_min and Vin_max to 5V - 5.5V the simulation will converge with a stable design. Again these simulation are based on calculated and theoretical values. I would suggest taking a TPSM53602EVM and testing for your application. It may turn out that at such a low output voltage, you will have large output capacitance that will result in a lower cross-over frequency and PM below standard 45-50. An alternative power module that can meet your requirement is the TPSM82822 and the TPSM82084. Regards, Jimmy + +Hi Jimmy, we start our design with TPS82085 Thanks & Regards Dieter + diff --git a/data/text/DLP2/895597 b/data/text/DLP2/895597 new file mode 100644 index 0000000000000000000000000000000000000000..f140b49ee21fa85bd8b808081669f31fdebcd047 --- /dev/null +++ b/data/text/DLP2/895597 @@ -0,0 +1,22 @@ +LM2576HV: High spark with high voltage IC-LM2576HV + +Part Number: LM2576HV High spark with high voltage IC-LM2576HV Hi I use a LM2576HV IC at an input voltage of up to 60 volts, a output of 5 volts and 1 amp. Output capacitor 470uf, input capacitors 100uf, inductor 100uh and 3amp schattky diode. When I connect voltages above 50 volts to the input, it ignites for a moment, drawing a high instantaneous current from the power supply. With load or without load. What do you think I should do to reduce the first time spark? To test the capacitor, I reduced the input to 22uf, but with a 55V connection to the input of the IC, the water burned LM2576HV. Is it okay to put one series inductor in the entrance? How much should it be? + +Hi Reza, Pls upload your circuit and PCB layout for more detail checking. B R Andy + +Hi Reza, How about your application issue? Pls upload circuit and PCB layout for more detail checking if problem still existing. B R Andy + +schematic and pcb of my converter Reza sD Part Number: LM2576HV High spark with high voltage IC-LM2576HV Hi I use a LM2576HV IC at an input voltage of up to 60 volts, a output of 5 volts and 1 amp. Output capacitor 470uf, input capacitors 100uf, inductor 100uh and 3amp schattky diode. When I connect voltages above 50 volts to the input, it ignites for a moment, drawing a high instantaneous current from the power supply. With load or without load. What do you think I should do to reduce the first time spark? To test the capacitor, I reduced the input to 22uf, but with a 55V connection to the input of the IC, the water burned LM2576HV. Is it okay to put one series inductor in the entrance? How much should it be? + +We added schaemtic and pcb photos. Please help Our problem was not resolved + +Hi Reza, Per data sheet Fig24, the inductor should be H330 for 50V to 5V/1A. so please try 330uH 3A choke in your application. Another issue is D3 position, pls change it as below: + +Hello Thanks for your reply Yes we change location of schottky diode. but for choke L; if we use a voltage input lower than 50v, 330uh is not a problems? for example, we connect 24v or 48v or 55v for Vin. + +Hi Reza, 330uH also can be used for Vin below 50V. Pay attention on inductor saturation current B R Andy + +Hello We test with 330uH. Then we announce the result. Is it true that the larger the inductance L in a step down converter, the better? But the problem is to increase the inductor resistance, increase the dimensions of the inductor and reduce its saturation current? + +Hi Reza, You have right sense on inductor size, we normally suggest 20%--40% inductor ripple current in buck application to balance inductor size and output ripple. the inductor current ripple is 23% for 24V to 5V/1A at 52KHz, B R Andy + diff --git a/data/text/DLP2/895632 b/data/text/DLP2/895632 new file mode 100644 index 0000000000000000000000000000000000000000..078c51dbecc517e0135d109b12498f86696efb0e --- /dev/null +++ b/data/text/DLP2/895632 @@ -0,0 +1,24 @@ +UCD3138: Question of PMBUS with ACK and clock stretching + +Part Number: UCD3138 Hicompany experts, I use UCD3138 test PMBUS write with microchip pickit serial analyzer. UCD3138 is slave, microchip pickit serial analyzer is master. I found if UCD3138 pull low clock before the ACK, the ACK clock is short. This condition only happened at every 4 byte(Not including address). please see the waveform as below, ex: write data [S_][B6][48][D0][39][4D][2E][53][41][30][35][P_] So I want to implement that UCD3138 don't pull low clock before the ACK, how can I do? And I want to implement PMBUS with interrupt, how to configure the register and firmware? Thanks! + +It's very difficult to prevent some clock stretching. The stretch is caused by the hardware waiting for the firmware to take the data from the receive buffer and ACK it. You only have half a PMBus clock cycle to respond, if you want to do so. I can't really tell what your clock frequency is - can you tell me what the time scale is on the zoomed in screen? At 100 kHz, you only have 5 microseconds. At 400 kHz, you only have 1.25 microseconds. With the need to have fast interrupts for other things, this means that you really can't avoid at least some clock stretching. Most micro controller systems have to have clock stretching. It doesn't seem to cause any issues with the communication anyway. I think that the short clock is something caused by the way the Microchip handles the clock, since the UCD releases the clock when it gets the ACK from the firmware. Without knowing the PMBus clock speed and the Microchip requirements, it's hard for me to say whether the short clock is dangerous or not. One thing I would suggest is using a pull up resistor of about 1.5 Kohm. Your rising edges look like they may be a little slow. We have found that a 1.5 kOhm resistor is good for protecting the PMBus from noise and other issues. + +Hi Ian, Thank you for supporting. The clock is 100KHz. I think to configure the fast interrupt with trigger DATA_RDY to take the data from the receive buffer to reduce the clock stretching, is the method possible to implement? Thanks! + +Tina, if you can dedicate the fast interrupt to PMBus only, you still may not be able to avoid the clock stretching entirely. And you will sometimes slow down the standard interrupt response, especially if there are things which are called by the PMBus function that are complicated. The PMBus functions are not written to go into the fast interrupt, and it would be relatively difficult to put them there. To try to make if fast enough, you will need to precalculate all monitoring information, and have the fast interrupt just return the pre-calculated values. You may also need to take all commands that change things in the UCD and put their code in a state machine in background, with the PMBus fast interrupt just setting a bit and storing information to tell the background what to do. If you are using the fast interrupt for other things, it won't be interruptible, so in that case you will still get clock stretching whenever the PMBus occurs with the fast interrupt. Also note that our PMBus functions are not designed to work from interrupt, so there may be issues if you use the PMBus interrupt to generate the fast interrupt. In addition, adding any additional interrupt function adds to the possibility of having broken writes and other asynchronous conflicts between the different interrupt levels. These are very hard to test for, and very hard to debug, as they only occur when two levels of code interact at exactly the wrong point in time. The interrupt has to occur while the lower priority task is in the middle of modifying the same thing. Unless there is a real problem with clock stretching, we do not recommend an interrupt driven PMBus. It doesn't seem that there is a real problem. + +Hi Ian, I only use PMBus interrupt in boot code, so I don't need other standard interrupt and other fast interrupt. I use the microchip pickit serial analyzer to test pmbus wirte that cause SDA timeout because the ACK clock is short. See the waveform as below, CH1: Master SDA, CH2: Master SCL, CH3: UCD3138 SCL I know that the short clock is caused by the way the Microchip handles the clock, but I need to use the microchip pickit serial analyzer to implement firmware upgrades. I configure the PMBus interrupt, but it isn't interruptible. Where do I ignore? What register is PMBus interrupt flag? And how to use the PMBus interrupt flag to enable and clear the PMBus interrupt? Thanks! + +Tina, I'm not sure what's going on there. What address are you using for the UCD. Make sure that you don't use address 0xFF, that can cause problems somtimes, and it's not permitted under PMBus. If you really want to use interrupts for PMBus, you need to look at the UCD3138 Technical Reference Manual in the PMBus section. You'll see the PMBINTM register where you can enable the interrupts. + +Hi Ian, I want to use fast interrupt in boot code, but I can't implement. I find the boot sample code load_64.asm is different with the AP code. I think I can't implement fast interrupt in boot code because load_64.asm don't configure fast interrupt. How can I configure the boot code? Thanks! d1d4 boot flash 001.zip + +The only thing the load.asm does is to link the vector for the fast interrupt to the fast interrupt function. But that is going to be a problem for you. Because the boot flash normally links the fast interrupt to the fast interrupt in the main program. .sect ".vectors" .state32 B c_int00 B vec_2 B vec_3 B vec_4 B vec_5 B vec_6 B vec_7 B vec_8 The normal load.asm links to the fast interrupt directly: .sect ".vectors" .state32 B c_int00 B _undefined_instruction_exception B _software_interrupt B _abort_prefetch_exception B _abort_data_fetch_exception B _abort_prefetch_exception B _standard_interrupt B _fast_interrupt So you'll have to put the branch to fast interrupt in the boot vectors. Which means that the fast interrupt will have to go into the boot area as well. but you still need to support the fast interrupt in the main program as well. So you really need to vector to a location which has a RAM vector which you load to branch either to the fast interrupt in the boot flash, or to vec8. This will slow down your fast interrupt. I know that you are seeing the issue after a clock stretch, but I'm still not convinced that this is the root cause. i would suggest that you put in a low value resistor, maybe a 100 ohm, in the data and clock lines between the two chips. That way you can tell which device is pulling the line down. Also, please try 1.5 Kohm pullups as well. What pullup resistor are you using now? + +Hi Ian, Thank you for supporting. The pullup resistor is 10 Kohm. I try 4.75 Kohm that can improve. But the pullup resistor 10 Kohm is defined by our customer, I can't change the pullup resistor. + +Tina, the UCD will definitely not work with a 10 K Ohm resistor. We recommend at least down to 1.5 Kohm. 10K may work with some devices, under some conditions, but for reliable operation under all conditions, and with all UCD devices we recommend a lower value. It cannot be solved with fast interrupt. + +I'll assume this is resolved. + diff --git a/data/text/DLP2/895633 b/data/text/DLP2/895633 new file mode 100644 index 0000000000000000000000000000000000000000..dac1c76c0709c15abfb2d5adf06c1a6dd96a88a8 --- /dev/null +++ b/data/text/DLP2/895633 @@ -0,0 +1,10 @@ +TPS40210: LM5022 PCB check + +Part Number: TPS40210 Hi again Richard, I also decided to send you the finished circuit board to check for gross discrepancies. When you find the time, look at it.PowerBoard_V1.0_All.PDF + +Hi Tsvetan, Thanks for sending the files. I can get back to you by next week since tomorrow is US holiday. Thanks, Richard + +Hi Tsvetan, Generally looks fine. I would add a placeholder capacitor in parallel to R20 and C24. Additionally, I would change R18 to 100 Ohm to minimize the time-constant so you don't delay the current sense signal. Thanks, Richard + +Hi Richard, I made the changes for which you wrote. Soon I will let the board for production and then will hear again. Thanks for the helpful tips and suggestions. Regards, Tsvetan + diff --git a/data/text/DLP2/895679 b/data/text/DLP2/895679 new file mode 100644 index 0000000000000000000000000000000000000000..619bd6083dcdb1438a27fab05321c775679ef88c --- /dev/null +++ b/data/text/DLP2/895679 @@ -0,0 +1,12 @@ +WEBENCH® Tools/LM5122ZA: LM5122ZA frequency setting + +Part Number: LM5122ZA Tool/software: WEBENCH® Design Tools Hi, LM5122ZA Feature shows frequency up to 1 MHz, why I cant simulate over 352.94 1KHz? So I setting Rt as 18 KOhm, the frequency is 500 KHz, but it shows an alert M1 Tj:341.27 °C Specification: <150.00 °C M1 MOSFET junction temperature is too high Suggested:<150.00 °C This may lead to a device malfunction or breakdown. Some possible solutions are below: Decrease Switching Frequency to decrease MOSFET or Diode switching losses Decrease ambient temperature Decrease thermal resistance by adding a heat sink if feasible Increase the copper area and thickness of the board I'd change many MOSFET with low Ciss/Coss, low Qrr. It still shows this alert. I have size issue, can't design the frequency under 500 KHz. Here is my setting specification as below: Vin=19V, Vout=60V, Iout=1.6A (Pin = 100W) Frequency = 500 to 800 KHz One more question about current limit I want set Ipeak=7A, according to section 7.3.10, Rs=10 mOhm According to section 8.1.4, if I want to use Rdcr of inductor, how to calculating 7A limit? + +Hi Nick, Sorry to hear you are having troubles. I can get back to you by next week since Friday is US holiday. Thanks, Richard + +Hi Nick, To answer each of your questions: 1) I'm able to build the circuit using the LM5122 model. What you should do is follow the attachment below: I believe there were some initial WeBench issues that may have prevented you from accessing this, but it seems to work for 500KHz. Additionally, if you are having more trouble getting WeBench to work, I would recommend using the LM5122 quick-start calculator here: /product/LM5122ZA/toolssoftware 2) If you want to implement DCR sensing, your peak current limit is ideally based on the inductor's dc resistance. The resistor and capacitor that you see in that scheme is to make sure that the time constants of the LR network and the RC network match. Thanks, Richard + +Hi Richard, Thanks for reply ! For the (2) question, for example According to section 8.1.4 of datasheet, I can calculate a value for LR and RC matching. But how could I know about my current limiting value? If my Iin_max = 5A, I want to set the current limiting at 7A. The only is changing my inductor's DCR to 10 mOhm? If my inductor's DCR is 20 mOhm, is there anyway to set the current limiting to 7A without a external sense resistor ? Thank you. + +Hi Nick, The peak inductor current is determined as the sum of your average input current (worse-case) and half of your inductor peak-peak ripple. Your current limit value is determined by the DCR resistance, so if you wanted to set an exact current limit, you would need to change the inductor's resistance to match. In fact, a better solution is to select an inductor with a DCR such that your IL_pk*DCR does not trip current limit. Additionally, you could add a resistor in parallel to C_dcr to increase your current limit, but this may require more calculations and an extra component. This second method can only increase your current limit. Thanks, Richard + diff --git a/data/text/DLP2/895692 b/data/text/DLP2/895692 new file mode 100644 index 0000000000000000000000000000000000000000..617a288f0ab4749fff23ce24621c2e23c504458e --- /dev/null +++ b/data/text/DLP2/895692 @@ -0,0 +1,10 @@ +Lead Acid Battery Charger for 2 serial 12V Lead Acid Batterys + +Hello at all I am locking für a lead Acid Batterie Charger for 2 serial 12V Lead Acid Batteries. My Charg Current must between 150 mA to 500mA. My Supply Voltage is from a step up and can change between 24V and 33V. Which is the right choice for my charging Point. Kind Regards Olli + +Hi, UC2906 is linear charger controller of external pass FET that can operate up to 40V input. BQ24610 is switching charge controller of external switching FETs that can operate up to 28V input. It will need a few modifications for optimal lead acid charger as documented in the app not at . Regards, Jeff + +Hello Jeff is it possible to use the BQ24450 for my problem. I will use a step up from 24 V to 32V, after that i like to use the BQ24450 for my Batteries. What do you think about that. Regards Oliver + +Oliver, Yes, you can boost the input and use the BQ24450. Please be aware of external pass element power dissipation. I recommend boosting only high enough to prevent the pass element from entering dropout, in order to minimize heating due to power dissipation. Regards, Jeff + diff --git a/data/text/DLP2/895721 b/data/text/DLP2/895721 new file mode 100644 index 0000000000000000000000000000000000000000..7b3b7c2c1eea06095056edfe5366362acf3952dd --- /dev/null +++ b/data/text/DLP2/895721 @@ -0,0 +1,12 @@ +BOOSTXL-PGA460: Using two PGA460 EVMs for Indoor Positioning System + +Part Number: BOOSTXL-PGA460 Hi I would like to evaluate the PGA460 for use in an ultrasonic indoor positioning system. In the end, there will be one mobile sender and multiple receivers, but for now evaluation of one sender and one receiver would be ok as well. Sender and receiver will be up to 5 meters apart, but never closer than about 0.5m. Is there any way I can set this up with one or more PGA460 EVM? The struggle will be to synchronize both evalkits to the same time source. Even if there are cables which will limit the distance two EVMs can be apart, but is there a way at all to test this with the kits? + +Hi Stefanie, Yes, it is possible to configure one PGA460 as a transmitter, and the other as a receiver. Yes, you can use two BOOSTXL-PGA460 EVMs to synchronize the two PGA460s devices using the broadcast burst-and-listen command. Please refer to the PGA460 Array of Ultrasonic Transducers for Triangulation and Tracking ( /lit/an/slaa783/slaa783.pdf ) app report for a detailed explanation on synchronizing multiple PGA460 devices. You don't need to add the triangulation algorithm for your application, unless you need position tracking. In short, one of the EVMs will only be connected to the driver (OUTA and OUTB pins), while the other EVM is only connected to the receiver (INP and INN pins). This way, when you send a broadcast burst/listen command to all PGA460s on the same UART/SPI bus, all devices will be synchronized, but only the driver-EVM will burst, and only the receiver-EVM will listen due to the hardware configuration. You can then add up to a total of eight PGA460 devices (one transmitter, seven receivers) to expand the number of receivers using the same approach since the PGA460 uses a three-bit address (UART_ADDR = 0h to 7h). + +Hi Akeem Thank you for the answers and the link, the SLAA783 is what I was looking for. But it does not provide details about the hardware setup. Is the demo application GUI used as a platform and the commands are issued using the "Interface Mode" tab? Meaning that the GUI will broadcast by sending a message out to all serial connectors available at the same time? Is it possible to communicate to the PGA460 that is sitting on top of the MSP430 using the serial COM port on the computer? What are the prerequisites? Can I have the GUI running at the same time or would it block the COM port? I will try to use multiple PGA460 as I will use trilateration for this setup: one receiver (the moving robot in the field with only a small battery) and multiple transmitters at fixed locations. + +Hi Stefanie, Yes, you can use the GUI's Interface page to send broadcast commands to all PGA460 devices connected to the same UART bus of the MSP-EXP430F5229LP. Afterwards, you would then use the Interface page to send a single address command to read back the ultrasonic measurement result or echo data dump data of the receiving PGA460s. Remember, you will need to pre-program the UART_ADDR to different values on all the PGA460s individually (using the GUI) before you connect them all to the same UART bus. It is possible to program the MSP-EXP430F5229LP to work in a serial USB-CDC COM terminal mode, but you will not be able to use both the GUI and a COM terminal simultaneously. The GUI requires the MSP430 to programmed with proprietary USB2ANY firmware that runs in a USB-HID mode. For an example of using the same PGA460-Q1 EVM hardware (MSP-EXP430F5529LP and BOOSTXL-PGA460) in a serial COM port mode, please refer to the PGA460 Energia Library and Code Example (Version 1.0.9) (Rev. I). This download actually includes a triangulation example (Triangulation.ino), which you can repurpose for the already implemented broadcast burst/listen command and ultrasonic measurement result readback. You would just need to remove the post-processing triangulation function. This example uses UART_ADDR address '0' as the transmitter/transceiver module, and address '1' as the receive-only module. Do not connect the transducer to the driver pins (OUTA/OUTB) on the receive-only module. + +Hi Akeem I have now worked with the Energia library extensively and am ready to connect multiple PGA460 daughterboards to the same MSP430 launch pad. Can I just stack the daughter cards on top of each other, meaning all IO Pins going from the MSP430 launchpad to the PGA460 will be in bus mode and be connected to all PGA460 in my setup? Or do I only connect certain pins of the launchpad in a bus topology to the PGA daughter cards? + diff --git a/data/text/DLP2/895771 b/data/text/DLP2/895771 new file mode 100644 index 0000000000000000000000000000000000000000..4919ca766d500dd84444d59f6f380481a4f72437 --- /dev/null +++ b/data/text/DLP2/895771 @@ -0,0 +1,12 @@ +LMR23610: Current Draw instability + +Part Number: LMR23610 Hello, I have been investigating this issue more. By increasing the inductance from 15uH to 22uH the current draw is stabilized. Reading the datasheet it shows that 15uH is recommended for 3.3V outputs. Attached is a schematic of the circuit in question. buck page.pdf + +Hello If the 22uH works for you, then that value should be OK. Thanks + +Frank, Is there any reason that the 15uH would cause unstable current draw. If so why would it be suggested in the datasheet. It is only a very few LMR23610 chips that seem to have this behavior with the 15uH inductors. Does any one have any insight as to why there would be a difference between chips? Anthony + +Hello There will always be difference between devices due to normal manufacturing tolerances. For this device the inductor value will have a small influence on the full load performance but more influence at light loads. If you can give us your schematic and your input, output, and load conditions, along with wave-forms of the input current for both "bad" and "good" conditions then we may be able to help explain further. Thanks + +Hello I will close this post due to inactivity. Thanks + diff --git a/data/text/DLP2/895784 b/data/text/DLP2/895784 new file mode 100644 index 0000000000000000000000000000000000000000..6e7eb3e4972b254aaf02d9a6ddfdd53f54f39649 --- /dev/null +++ b/data/text/DLP2/895784 @@ -0,0 +1,14 @@ +BQ24070: BQ24070 STAT1 is blinking + +Part Number: BQ24070 Hi Sir, My customer encountered a problem with the behavior of pin STAT1. When the charger IC fully charged the battery and continued to operate overnight (maybe up to 8~10hours), they found the pin STAT1 will start to blink. This does not happen in all the cards with BQ24070, only a few of them. Once this phenomenon occurs, it can be solved by replacing with another BQ24070. Would you kindly advise how to solve the problem? Thanks Sincerely, Edward + +Hello Edward, When this occurs, do you see a difference between the voltage on the BAT pin and the battery before termination occurs? + +Hi Raheem, Just want to check again about the voltage difference. Did you mean the voltage difference between the good one and the blinking one? Since the pin BAT1/BAT2 are short to output of battery, there seems to be no voltage difference between them. Thanks Edward + +Hello, There's some trace impedance between the BAT pin and the battery which can cause the voltage on the BAT pin to be higher than the actual battery voltage. + +Hello, Any updates here? + +Hi Raheem, For now it's hard to reproduce the issue after replacing the charger IC with new one. May I close the thread first and open a new one once it happens again? Thanks Sincerely, Edward + diff --git a/data/text/DLP2/895821 b/data/text/DLP2/895821 new file mode 100644 index 0000000000000000000000000000000000000000..52e5b61220680b63ff2b36855a39853b20954aff --- /dev/null +++ b/data/text/DLP2/895821 @@ -0,0 +1,12 @@ +BQ24195: REGN and PMID definitions + +Part Number: BQ24195 Q1. I've looked all over and can't find what REGN and PMID stand for. Q2. In section 5 of the datasheet (SLUSB97A) the last sentence of the 4th paragraph states"When the full battery falls below the recharge threshold, the charger will automatically start another charging cycle." and in section 8.3.3.1 the last sentence of the paragraph under the bullets states "When a full battery voltage is discharged below recharge threshold (REG04[0]), the bq24195L, bq24195 automatically starts another charging cycle." The Battery Recharge Threshold (VRECHG) can be set to 100 or 300 mV with the default being 100 mV. What is the 100 or 300 mV referenced to? It can't be referenced to ground or the recharge cycle wouldn't start until way below 3.0 V. I'm using a LiCoO2, 2000 mAh, 3.7 V battery. Thanks Much! + +Hi, 1. REGN is internal LDO regulator. PM100mV ID is the direct power input for the charger. 2. 100mV or 300mV is referenced to VREG (REG04[7:2]). Thanks, Ning. + +Hi Ning, Thanks for responding! I should have asked differently and I apologize for any confusion. 1) What do the letters stand for? Example: POR stands for Power On Reset 2) I was really asking multiple questions here so please allow me to clarify: 2.1.a "When the full battery falls below the recharge threshold, the charger will automatically start another charging cycle." 1 2.1.b "When a full battery voltage is discharged below recharge threshold (REG04[0]), the bq24195L, bq24195 automatically starts another charging cycle." 2 The term “full battery” is what’s throwing me off and of the two statements here, the second statement, while self contradicting, makes more sense that the first sentence. My rationale for saying this is that, referring to 2.1.a, a "full battery" will have a voltage around 4.1 to 4.2 V and never fall below the VRECHG threshold, therefore it shouldn’t be referred to as a “full battery”. The statement in 2.1.b again uses the phrase “full battery”, but this time adds the fact that the battery has been “discharged”, however it says that when the battery voltage drops below the VRECHG threshold another charging cycle is initiated. You stated that VRECHG threshold (100 mV or 300 mV) is referenced to VREG (REG04[7:2]). This means if VREG is set to 4.208 V (default) and VRECHG is set to 100 mV (default) the recharge cycle will initiate when the battery voltage drops below 4.108. VREG (4.208 V) - VRECHG (100 mV) = 4.108 V therefore VRECHG can’t be referenced to VREG or to GND as I stated in my original query. 2.1) The PCM on my battery has an Overdischarge threshold of 2.50 V and I want my battery recharge cycle to initiate at 3.0 V so how do I achieve this? 2.2) Does or can the phrase “full battery” mean something other than a battery that is full? Please note this is just a confusing/irritating point for me considering my background in Metrology where accuracy and precision are the order of the day. References are within Datasheet SLUSB97A 1 section 5 the last sentence of the 4th 2 section 8.3.3.1 the last sentence of the paragraph under the bullets Thanks Much, Vernon + +Veron, 1) The pin names are inherited from earlier products. 2.1) The host may disable charge when needed, but separate battery monitoring circuitry is needed. You may consider BQ25895 which has integrated battery monitoring function. 2.2) Full battery means the battery voltage has reached VREG (e.g. 4.208V), i.e. the battery is charged to full. Thanks, Ning. + +Hi Ning, I've been working with the bq27441 Fuel Gage, however a cursory look at the bq25895 looks very promising. Thank you so much for the help! Stay Safe! Vernon + diff --git a/data/text/DLP2/895920 b/data/text/DLP2/895920 new file mode 100644 index 0000000000000000000000000000000000000000..8855cc59d73e1ec275dec2cc9d2f8d3832ceb028 --- /dev/null +++ b/data/text/DLP2/895920 @@ -0,0 +1,8 @@ +BQ21040: When the charging current of 0.8a is output by BQ21040 and the ambient temperature is 25 degrees, what degree will the IC reach? + +Part Number: BQ21040 When the charging current of 0.8a is output by BQ21040 and the ambient temperature is 25 degrees, what degree will the IC reach? How to calculate the NTC of BQ21040?Do you have a spreadsheet? Does BQ21040 support 100K NTC? + +With 5V input, an estimate of junction temperature would be (max dropout voltage) * 0.8 A * RθJB + 25C = (5-2.5V) * .8A * 45.5 C/W + 25 C = 116 C. This also depends on board layout. The IC temperature is not recommended to be measured with the TS pin, the device has internal thermal regulation when it approaches 125C. The TS pin is intended to measure the temperature of the battery pack. We do not recommend you use a 100k NTC as this would put the temperature range of the device outside normal range. We suggest a 10K NTC such as SEMITEC 103AT-2. This gives the normal operation of 0 - 45C. What temperature range are you trying to achieve here? Best, + +Hi there, I haven’t heard back from you, I’m assuming you were able to resolve your issue. If not, just post a reply below or create a new thread if the thread has locked due to time-out. Regards, + diff --git a/data/text/DLP2/895945 b/data/text/DLP2/895945 new file mode 100644 index 0000000000000000000000000000000000000000..379ff623f8a942bd51d42dc8c4ffd5e898f15449 --- /dev/null +++ b/data/text/DLP2/895945 @@ -0,0 +1,14 @@ +TPS3850-Q1: /RESER and /WD tie together + +Part Number: TPS3850-Q1 Hi team, I would like to tie /RESET and /WD together to make MCU in reset state when either OV/UV or Watchdog time out error occurs. Is there any concern using these functions tie together? If this is possible, pull up resister values should be same as I use these pins separately, since /WD is in high impedance while /RESET is low, correct? regards, + +Hi Shinji, Have you looked at a device such as the TPS3813-Q1 that combines these functions into a single RESET output? Thanks, Abhinav. + +Hi Abhinav, Thank you. I will look into this. But what about the operation of the TPS3850-Q1? Is it possible to use TPS3850-Q1 in this use case? regards, + +Hi Shinji, I believe by tying two equivalent pullup resistors here, it should still operate as intended. This use case, however, is not guaranteed in the datasheet. It must be tested. Thanks, Abhinav. + +Hi Abhinav, Since /WD is in high impedance when /RESET is pulled Low, I think pull up resistor only requires 1, correct? regards, + +Shinji, Yes, sorry, I meant two rails to one pullup resistor. Thanks, Abhinav. + diff --git a/data/text/DLP2/895959 b/data/text/DLP2/895959 new file mode 100644 index 0000000000000000000000000000000000000000..b224c167eeb63709dd5ccc6f70372b8b3987110e --- /dev/null +++ b/data/text/DLP2/895959 @@ -0,0 +1,24 @@ +High Side Switch with Ultra Low Power + +Hi, Is there a high side switch that can run off a 9-14V battery pack with a 3.3V enable? It will essentially be used as a gate driver for an N-channel FET that is switching high current loads. We are specifically looking for something with the lowest possible quiescent and shutdown currents; preferably in the nanoamps. I haven't found any in thecompany parametric search since I can't search by Iq. Kind regards, + +Hello Dan, We do have a pretty sizable portfolio of High Side Switches depending on what the application needs. You mentioned 'high current' any chance you can share with us what type of load you are driving, peak/ nominal current profile? Before I can answer the question on Iq, I'd like to double check and make sure we are looking at the right portfolio: Do you need: 1. A solution with an integrated FET that provides on/off control for off-board load driving, <<70-90A -> If yes, this is the high side switch Specific product: TPS1HB08-Q1 2. Do you plan to use an external FET and you only need a gate drive to turn on/off FET -> If yes, then you may need to look into the Ideal Diode Controller family. Our lowest Iq device in this family is the LM74700 Both families listed above are AECQ100 qualified and work across the car battery voltage range. On Iq, are you referring to the quiescent current when the device is enabled (operating quiescent current when enable=high) ; or in shutdown mode? Thanks for providing clarity, so we can get you to the right products. -Priya + +Thanks Priya, Sorry about the delayed reply. I had some time off work. I don’t think I’m reading the TPS1HB08-Q1 datasheet correctly. Why is the output leakage in standby (0.5µA @ 25°C) greater than the total output current in standby (0.1µA @ 25°C) ? I took the total output current in standby to mean leakage also because there shouldn't be any output in standby mode. Peak would be around 50A, and the normal would be < 32A. We’re still working on the first prototype so it would be better to overestimate. The purpose of this FET is to disable most of the board to allow the product to hibernate We are looking for a solution with an external FET. We are open to integrated FETs but didn’t think this would be viable. We already include STL180N6F7 in our BOM so we would prefer to use that in order to reduce the number of unique components. On Iq, We would like shutdown mode to be in the nanoamps to extend battery life. The lower the better. The shutdown current of LM74700-Q1 (0.9-1.5µA) is better than most but we would still like something lower. The operating quiescent is less important but we would prefer something less than a few µA. The operating quiescent current of TPS1HB08-Q1 (6mA) may be too high. Kind regards, + +Dan, The LM74700-Q1 will likely be your best bet here as an ideal diode controller. It will be limited on the sort of diodnostics it can provide, however will offer the least quiescent current. I will loop in someone from the team who will be able to provide more intimate technical details about the part. + +Hi Dan, If you are looking for low Iq Ideal diode controller, then LM74700-Q1 is the best fit. But however you are looking for high-side switch which you would like to turn on the loads when disabled. LM74700-Q1 can not be used in these applications, because even if it turned off body diode of external MOSFET is going to conduct. LM5060-Q1 is another device which controls the MOSFET in a high-side switch type of functionality. This is more suitable than LM74700-Q1. Regards, Kari. + +Thanks Timothy and Kari, We are looking for a high side switch. I suspect that what I'm looking for may not exist. We have relaxed the spec but we still need to preserve battery life while the FET is disabled. This product will sleep for months between short bursts of high power consumption. Unfortunately, LM5060 still doesn't meet our requirements because of it's 15µA max shutdown current. Do you have anything that matches the following relaxed requirements? Total shutdown current is by far the most important parameter. Total ISHUTDOWN Prefer ≤ 1µA Accept ≤ 10µA (only if we really have no choice) Total IOPERATING Prefer ≤ 1mA (the lower the better) Accept ≤ 10mA (only if we really have no choice) VLOGIC Must be compatible with 3.3V micro VSUPPLY Must run on 9-14V supply The unlikely exception is if it can run on a 3.3V supply and drive an N channel FET from 9-14V without compromising shutdown current by adding the additional supply. FET configuration Must be high side Prefer external but will accept internal FET of ≥ 80A. Prefer N channel. P channel alternatives would need to beat the N channel drivers by enough to justify the additional reel. Kind regards, + +Hi Iq reduction is possible with LM5060 by adding a MOSFET between IC GND and external GND. This GND side MOSFET can be disabled during shutdown mode. Rakesh will share more in this solution. Regards, Kari. + +Hi Dan, A signal FET between device ground and the system ground like below can help to meet the target shutdown current spec. Let me know if you have any followup questions. Best Regards, Rakesh + +Thanks Rakesh and Kari, Using that solution, how low will the shutdown current be? Will it just be the sum of the IDS leakage from the low side small signal FET and high side power FET? Can the overcurrent detection be disabled so that we can use it at 80A through the power FET? We already have overcurrent protection closer to the supply anyway. Kind regards, + +Hi Dan, We have not characterized the leakage current but it should just be the leakage through the external FET (Drain-to-Source leakage). As you see, the ground disconnect FET leaves all the external biasing components around LM5060-Q1 OPEN and hence no shunt leakage at the input. The overcurrent function can be disabled by connecting the TIMER pin directly to the device GND. Best Regards, Rakesh + +Thanks Rakesh, I am very excited about this solution. When I took it to the rest of the team for review, a few questions came back. When LM5060 is disabled through the enable pin, and through the shutdown pin, what is to stop the enable pin from floating higher than 3.3V and frying the microcontroller on the other side? From the block diagram in the datasheet, it looks like the enable pin may actually end up being pulled to the now floating GND which could potentially be at the same level as the 9V-14V input. Is there anything else on the PG pin that we would need to worry about in the same way as the enable pin? It looks like it would be safe, assuming that the block diagram is complete. The signal FET that I intend to use for disconnecting the device ground has a VDS leakage of 100nA. It could be replaced with something that has better leakage, but what will this leakage do to the LM5060? e.g. if GND floats around 5V or 16V when the supply is 9V-14V, will it cause the LM5060 to do unpredictable things with the power FET? Kind regards, + diff --git a/data/text/DLP2/896070 b/data/text/DLP2/896070 new file mode 100644 index 0000000000000000000000000000000000000000..32eeccc581a6d15e8d1811acf183f900f971c238 --- /dev/null +++ b/data/text/DLP2/896070 @@ -0,0 +1,24 @@ +BQ24650: BQ24650RVAT: Maximum Charge Current + +Part Number: BQ24650 Am thinking about using this part to charge lead acid batteries with a maximum charge current of 10A. Usingcompany CSD18502Q5B MOSFETS and Coilcraft SER2915 series inductor. Will this work? Thanks! + +Nicholas, The BQ24650 HI and LO gate drivers should be able to drive the FETs hard enough to get 10A. With the correctly sized inductor for the VBUS to VBAT delta and desired current, and related, voltage ripple, that inductor should work. I recommend reading the two appnotes below if the application is for solar charging: Regards, Jeff + +Thanks! + +Asking a related question: I want to implement the charging circuit in figure 2 of appnote SLVA437SA "Using the bq24650 to Charge a Sealed, Lead-Acid Battery" 1) If I were to power my system load directly from the battery pack e.g. the node of D3, R6, R23, etc, would this confuse the charging process by drawing too much load current through R6 (Rsr)? 2) If I power my system load from the recommended node, it looks as though the load powers from Vin when Vin > Vbattery pack and from Vbatterypack otherwise. How can I assure that the load power is uninterrupted when near the transition? + +Hi Nicolas. Regarding 1, the charger limits the output current to the programmed value per RSR. If your load load connected in parallel with the battery draws all of that current, then the battery will not charge. Also, with an almost charged battery, the charger will not be able to distinguish between load and termination current so the charger will likely never report charger termination correctly. Regarding 2, if the VIN and battery nodes are properly diode ORd, the transition is seamless. Regards, Jeff + +Got it, thanks! + +Another related question! If I were to use my host processor to monitor battery voltage and charge current while controlling the MPPSET pin. I could implement the pulse charging algorithm as described in the appnote for charging lead acid batteries without the added components. My ideal goal is to power my load directly from the battery while charging while eliminating the ORing diodes in the process.is this feasible? + +Nicolas, Yes! Regards, Jeff + +Thanks again, that's a huge plus that will help this part fit perfectly in my design + +One more... The example ckt on p23 has D2 as a BAT54C which is a dual diode. Am assuming that the 2nd diode is unused and just want to confirm. + +Hi Nicholas, I think the part number is a typo. It should be the single diode version of the BAT54. Regards, Jeff + diff --git a/data/text/DLP2/896167 b/data/text/DLP2/896167 new file mode 100644 index 0000000000000000000000000000000000000000..9c566967761bf8fdc6327b42459a1121bf32e07d --- /dev/null +++ b/data/text/DLP2/896167 @@ -0,0 +1,14 @@ +BQ4050: A giant skip of a smart battery using bq4050 gague in low temperature(-20℃) + +Part Number: BQ4050 Hello,experts of TI, There is a urgent issue need to solve. Battery using a bq4050 gague . During the test in normal temperature(25℃),there is a 5% skip of the battery capacity; During the test in low temperature(-20℃),there is a 85 % skip of the battery capacity; During the test in high temperature(55℃),there is a 7% skip of the battery capacity; So,I wanna know that how to fix the battery discharge curve so that battery capacity has a acceptable performance among normal/low/high temperature. THANKS. + +My colleague will take a look and get back to you. Andy + +Please clarify, is this the bq4050 or the bq40z50? + +Thanks for your reply. And as my title said, the gauge IC is bq4050. Thanks. + +The bq4050 uses CEDV, which relies on accurate learned FCC with qualified discharges. See 6.3 in the TRM for details. A qualified discharge to update FCC has, among other rules, a limit on temperature, which is 11.9C by default. A battery will have vastly reduced capacity at -20C and depending on the load, FCC can be significantly less than FCC that was learned above 11.9C. Therefore it is possible that the gauge will calculate incorrect SOC at -20C because it will use FCC that is too high for this temperature. There is a limitation of the CEDV algorithm. The bq40z50 does not have this restriction. If you observe a jump in SOC at room temperature then the previously learned FCC is not indicative of the conditions that were present. For example, the load may have increased. That's why it is important for the gauge to learn FCC through regular discharges with a typical load at temperatures above 11.9C. The CEDV algorithm has the ability to adjust EDV2/1 voltages based on load and temperature (but not down to -20C) to mitigate SOC jumps. This requires that you program the gauge CEDV parameters based on: /tool/GPCCEDV + +Thanks. And I'll have a try as you told. + diff --git a/data/text/DLP2/896197 b/data/text/DLP2/896197 new file mode 100644 index 0000000000000000000000000000000000000000..356bd01766a66a813d536cf391a858a1cad57ee3 --- /dev/null +++ b/data/text/DLP2/896197 @@ -0,0 +1,16 @@ +UCC21710-Q1: time delay before OC pin is activated + +Part Number: UCC21710-Q1 Hicompany engineers, I have a question about time delay of OC-pin. According to the datasheet, "The OC pin is in high-impedance state when the output is in high state, which means the overcurrent and short circuit protection feature only works when the power semiconductor is in on state." I am wondering whether "OC pin becomes Hi-Z" and "output becomes high state" occur simultaneous or not? If "OC pin becomes Hi-Z" occurs after "output becomes high state" with some time delay, and then how much the time delay is? Appreciate any information you can provide. Many thanks. Zack + +Hi, Zach, Welcome to e2e, and thanks for your interest in our products. Check out Figure 36, this shows how the over-current protection works. Figures 24 and 26 include timing information as well. Let us know if you have further questions. + +Hi Don Dapkus, Many thanks for your reply. In fact, I was confused by the difference of datasheet figure and the simulation results. According to the datasheet, it seems that there is a tiny time delay to release oc pin after gate increases. In fact, I am not very clear about the meaning of "Gate" here. Is it the gate voltage across the gate-source terminals of the mosfets, or the voltage of OUTH/OUTL pins of this IC. Or maybe there is no big difference for them. However, according to the simulation results. there is a more than 250ns time delay, which is too large for my application. Please see the following picture. I used the UCC21710 Unencrypted PSPICE Transient Model provided bycompany and then converted it into LTspice simulation to get the below results. Is this 270ns time delay true for ucc21710? or is it possible for ucc21732 since there is 2L soft turn-off in the vgs waveforms, which is consistent with the characteristics of ucc21732. And another question about UCC21710 Unencrypted PSPICE Transient Model, why dose this model have the 2L soft turn-off characteristics of ucc21732? Is that right? Appreciate any help you can give. Many thanks. Bests, Zack + +Hello Zack, There is no internal delay for the OC pin to begin rising. It is able to track the voltage applied to the pin within a few tens of nanoseconds of the OUTH pin going high. The Gate signal is denoting the actual voltage of the IGBT or SiC MOSFET. This is different than OUTH/OUTL when there is a gate resistor present. The reason the figure shows a small delay between Gate going high and OC going high is representing the time before the Gate reaches the threshold voltage of the IGBT or SiC MOSFET. The current through the device will not begin to rise until this threshold is met. Thus, the OC voltage does not sense the current until the Gate voltage is high enough to allow current to flow (through the sense resistor or other means of connecting the OC pin). Whatever is causing the delay in your simulation should not be due to the IC. Can you share a snapshot of the circuit? I do not see the 2LTO behavior in my simulation model. It is the STO behavior. It is hard to see from the waveform you share whether the turn-off exhibits STO or 2LTO behavior. Additionally, if you are simulating with a power device model, you may see a plateau voltage due to the power switch characteristics itself during STO, rather than a plateau voltage induced by the gate driver. Regards, Audrey + +Hi Audrey， Many thanks for your quick reply. Now I am clear about timing question. Then let's focus on the simulation issues. First, here gives the circuit and simulation results of ucc21710 with VDD=15V. This is a single switch hard-switching short-circuit fault testing. The model of mosfet tested is from Wolfspeed. For the waveforms, the sequence follows: vds: drain-source voltage of mosfet; iL1 is the short circuit current. voc: the voltage on oc pin. vgs: gate-source voltage mosfet, vpwm_in: pwm signal input. Overall, the simulation results are strange, I think. When the fault is detected, vgs is still at high output for long time, which is even longer than the pwm signal. It is amazing. In order to illustrate the possible 2LTO, I increased the value of VDD, then you can notice the change of vgs during fault condition. It looks like the 2LTO. I also find another interesting thing about ucc21732. I just replace above ucc21710 LTpsice model with ucc21732 LTspice model and add the external mosfet for clamping function. The left circuits remains the same with the above ones (VDD=15V). From ucc21732's results, vgs can be shut down normally, but there is no any 2LTO waveforms as datasheet mentions. It looks like that these two models swap their fault turn-off characteristics. For ucc21710 and ucc21732, I just used online unencrypted models, and converted them into LTspice to get simulations. Many thanks for your time and hep. Bests, Zack. + +Hi Audrey， I just modified my simulation setup and then find something to clear some of my questions. I put the rest signals to clear fault signals and thus I can obtain the multiple and continuous short-circuit behaviors. I found that after the first two abnormal events, the vgs looks normal at the third pulse. You can see the following the pictures. The first picture is about ucc21710 and the second one is about ucc21732. For ucc21710, the vgs will be shunt down at the third fault pulse, which is different from the first two pulses. And there is no 2LTO for the normal waveforms. For ucc21732. the vgs will reobtain the 2LTO function at the third fault pulse, which is different from the first two pulses. So I guess the previous simulation may be related to the start-up process? Since it is just my guessing, I still want to get your comments and suggestions. Many thanks. Appreciate the discussion with you. Bests, Zack + +Hello Zack, The VDD UVLO delay to Output High is 5us and the VCC UVLO delay to Output High is 37.8us. It does not look like UVLO startup delay since the output follows the input from the first pulse. This is unusual behavior and I will need some time to check the model and your circuit more closely. If you delay the start of the simulation (after 10us) does the behavior persists? Additionally, what is your command statement "ic. v(C1)=0"? Regards, Audrey + diff --git a/data/text/DLP2/896239 b/data/text/DLP2/896239 new file mode 100644 index 0000000000000000000000000000000000000000..2db745ff75609534c4be4f4928de028f574f487d --- /dev/null +++ b/data/text/DLP2/896239 @@ -0,0 +1,10 @@ +TPS53355: What is the voltage of 'PGOOD' pin? + +Part Number: TPS53355 Customer connects TPS53355 'PGOOD' to 'MODE', by a 100kohm resistor to select FCC mode. So based on this kind of connection below, how to calculate 'PGOOD' signal voltage? is it 4.5V? + +Hi Shenhua, The VREG voltage range is from 4.77 to 5.36V with a nominal voltage of 5V. Using that, when PGOOD is high, the 10K and 100K will form a potential divider and will give you an approximate voltage of 4.5V (for a nominal 5V of VREG) on PGOOD pin. When PGOOD is pulled low, it would be having an on resistance between 15 ohm to 55 ohm. So would give a logic low voltage of 27mV for 55 ohm forming the resistor divider with 10k for a 5V Vreg. Please refer to the electrical characteristics table for ranges of VREG and PGOOD on-resistance. Regards, Gerold + +Hi Gerold, When PGOOD is high, there is a 10k&100K divider from VREG; When PGOOD is low, there is a 10K&55ohm divider from VREG; Is it correct? If yes, when PGOOD is high, Mode pin should be 0v, right? Then PGOOD forms by 10k and 100K divider from VREG. + +Hi Shenhua, When PGOOD is high, there is a 10k&100K divider from VREG; Answer is Yes When PGOOD is low, there is a 10K&55ohm divider from VREG; Answer is Yes MODE pin senses 2 things: The first is the resistor connected to the pin during start-up to determin soft start time. The second is the voltage on the pin to determin Auto skip or FCCM. Before startup, it senses the resistor and for a 100k resistor it startup with a 1.4ms soft start time. The PGOOD voltage remains low during start up. So the MODE will be low. So, the part will be auto-skip mode during start-up. After the start-up completes, PGOOD will go high and the MODE pin will also go high. So the part will toggle from auto-skip mode to FCCM mode. Please refer to this section in the datasheet /lit/ds/symlink/tps53355.pdf#page=20 Regards, Gerold + diff --git a/data/text/DLP2/896245 b/data/text/DLP2/896245 new file mode 100644 index 0000000000000000000000000000000000000000..8940f7ad2cb6caf997e34e7b616a7f68f0d9a77c --- /dev/null +++ b/data/text/DLP2/896245 @@ -0,0 +1,24 @@ +AWR2243: MINO Antenna layout pattern in the reference document: Design Guide TIDEP-01012 + +Part Number: AWR2243 Hi, About the question for the antenna configuration at the page 9 of the document, Design Guide TIDEP-01012, Why the distance between the RX Array- B and RX Array-C is 4 lamdas, and the distance between RX Array-C and RX Array-A is 16 lamdas ? Thanks Michael Su + +Hello Michael, The antenna array spacing is set to get the virtual receiver antenna array as shown in page 10. If the spacing is reduced this azimuth array spacing, which is presently 86 lamda/2 , will reduce, reducing the azimuth angular resolution. Regards, Vivek + +Hi Vivek, For application of cascade two AWr2243 chips, no elevation angle is considered that means the 6 TXs are positioned at the same level, in order to get the maximum virtual RX antenna, what the distance between the RX Array- B and RX Array-C should be spaced ? ( the space bewteen RX in the same group is 0.5 lamda, the space between TX antenna is 2 lamdas) Another question, For same application, how to calculate the angular resolution in the TX beamforming mode ? Why it said the angular resolution in these two operation mode ( TX beamforming mode and MIMO mode) are equivalent in the document: Design Guide: TIDEP-01012 Thanks Michael Su + +Hi Vivek, Any updaate ? Thanks Michael Su + +Hello Michael, If you want to use uniform antenna spacing and get good angular resolution in the azimuth angle, without any overlap antennas, then you can have a 48 element virtual Rx array (6 Tx and 8Rx) , with all virtual Rx spaced by Lamda/2 spacing. The angular resolution depends on the virtual receive antenna array , you can refer to some of the training material we have online for more details: /sites/default/files/docs/mmwaveSensing-FMCW-offlineviewing_4.pdf Regards, Vivek + +Hi Vivek, I know the angular resolution is prportional to RX antenna number, The total RX antenna number of the TX beamforming mode should be smaller than the MIMO mode, but why it said the the receiver angle resolution in these two operation modes (TX beamforming mode and MIMO mode) are equivalent in the paragraph 3.4.2 of the document, TIDUEN5A ? Thanks Michael Su + +Hi Vivek, Any update ? Thanks Michael Su + +Hello Michael, The results in section 3.4.2 of the user guide are with stitched TX beam forming, that is multiple readings taken with beam steered at different angles. That is how the aperture is the same as MIMO and hence the angular resolution in this case is similar. If you have only one measurement with beam steered at one angle only then the angular resolution would be poorer. Regards, vivek + +Hi Vivek, 1. For application, the two AWR2243 chips are cascaded, in order to get the more azimuth virtual antenna ( remove the overlapped antenna), the distance between RX array-B and RX array-C will be increased in the documen, TIDUEN5A, will it get any sid effect ? will the overlapped antenna be necessary ? what is your recommendation ? 2. In the document, TIDUEN5A, why the virtual RX antenna is 7 for elevation plane? how to calculate them? 3. For LRR application, if the azimuth FOV is +- 9 degree, the antenna configuration is 6TX + 8RX, what the azimuth angular resolution should be in the TX beamforming mode ? Thanks Michael Su + +Hi Vivek, Any update ? Thanks Michael Su + +Hi Vivek, Any comment or any update ? Thanks Michael Su + diff --git a/data/text/DLP2/896249 b/data/text/DLP2/896249 new file mode 100644 index 0000000000000000000000000000000000000000..af6a793968dd90dbf38b658fe0a39fbf4b1b9869 --- /dev/null +++ b/data/text/DLP2/896249 @@ -0,0 +1,24 @@ +IWR1443BOOST: IWR1443BOOST Heatmap + +Part Number: IWR1443BOOST trying to get the heatmap data from the IWR1443Boost demo board. Is the FFT bin number by default 256? Any way to change it to 512 or 1024? Henry + +Hi Henry, Are you working with the standard Out of Box Demo or a different software set? We'll need a few days to respond to the rest of your question. Regards, AG + +Hi AG, I am using the default, preloaded software of the demo board and I am using Python to get data from the comm port using the CLI commands. Thanks a lot, Henry + +Hi, Henry: Which SDK version you are using? And are you talking about range-Doppler heatmap? If so, the range-Doppler heatmap size is determined by the number of ADC samples (range FFT size) per chirp and the number of chirps (Doppler FFT size) in one frame. You can search for profileCfg and frameCfg inside the SDK users guide to understand how to change them in CLI control interface. The SDK users guide is located at: C:\ti\mmwave_sdk_xx_xx_xx_xx\docs\mmwave_sdk_user_guide.pdf. The range of ADC samples is below 1024, which can be found below: file:///C:/ti/mmwave_sdk_03_03_00_03/packages/ti/control/mmwavelink/docs/doxygen/html/structrl_profile_cfg__t.html#a9448ecc83ce18857f1f1efba82af3d72 The range of number of loops is below 255 , which can be found below: file:///C:/ti/mmwave_sdk_03_03_00_03/packages/ti/control/mmwavelink/docs/doxygen/html/structrl_frame_cfg__t.html#a6f3cf525d5792d9f906c72cd7e76f66d In addition there is limitation of the max value of (range FFT size * Doppler FFT size * number of antenna pair), which is below 96K complex samples per frame for IWR1443. In addition, you may limited by UART speed, so please adjust the frame periodicity accordingly. Best, Zigang + +Hi Zigang, It is MMWAVE SDK 2.1.0.4 and I am doing the Azimuth heatmap. Thanks a lot, Henry + +Hi, Henry: The Range-Azimuth heatmap is generated from the zero Doppler bins. The zero Doppler bins is calculated inside radar sensor and with size (number of range FFT * number of visual antenna), then the actual heatmap is calculated inside the visualizer instead of the radar sensor. I will reach out to find out the size of this heatmap in angle domian and get back to you. Best, Zigang + +Hi Zigang, What is the number of range FFT? Thanks a lot, Henry + +HI, Henry: Range FFT information can be configured through profileCfg as number of ADC samples. You can search for profileCfg inside the SDK users guide to understand how to change them in CLI control interface. The SDK users guide is located at this relative directory: C:\ti\mmwave_sdk_xx_xx_xx_xx\docs\mmwave_sdk_user_guide.pdf. The maximum number of ADC samples is below 1024. In addition there is limitation of the max value of (range FFT size * Doppler FFT size * number of antenna pair), which is below 96K complex samples per frame for IWR1443. Best, Zigang + +Hi Zigang, Fully understood now. Really appreciate for the help. Henry + +Hi Zigang, Actually, I have two more questions: 1. I am trying to do the calculation on the angle of arrival based on the heatmap data. What is the FFT bin to do the AOA? I am using 8 which is the number of virtual antenna. But I looked at the code of mmWave Demo Visualizer, it seems using a bin of 64. 2.I am using 2 TX and 4 RX antennas for MiMo, would the virtual antenna sequence be in the heatmap data as: virtual antenna 1, virtual antenna 2 .... virtual antenna 8. If we do FFT on that and find the the first peak at sequence number 5, is the object at the azimuth angle of 90 degrees? Thanks a lot, Henry + +Hi, Henry: 1) The FFT bin used for angle estimation can be decided by users depends on available MIPS and memory. A size of 32 or more will be suggested. After FFT operation, the peak will be detected. If the FFT size is small, then the peak location will not be very accurate. 2) If you apply fftshift to your FFT output, then the index w = (-NFFT/2:NFFT/2-1)*2*pi/NFFT; So in your example, let us assume the peak of FFT output (before fftshift) is index 5, and the FFT size is 8 as you suggested in your question, then your w_peak is actually -pi; then the peak angle is actually: theta = asin (w_peak/pi) = -90 degree. You can find some basic angle estimation training at: /sites/default/files/docs/mmwaveSensing-FMCW-offlineviewing_4.pdf Best, Zigang + diff --git a/data/text/DLP2/896252 b/data/text/DLP2/896252 new file mode 100644 index 0000000000000000000000000000000000000000..61b84eae0fdd5bc527f0b3358bf021b6013cc3c3 --- /dev/null +++ b/data/text/DLP2/896252 @@ -0,0 +1,20 @@ +LP38502-ADJ: Can this part support 4.85V/600mA output from 5V/900mA input? + +Part Number: LP38502-ADJ TI, I am looking at this part LP38502-ADJ, Linear Voltage Regulator IC 1 Output 1.5A 8-WSON. This part is recommended be WEBench and other TPS parts. Can this part support 600mA and 4.85V output current and voltage from an input of 5V and 900mA?From the datasheet it seems able to support this spec but like to confirm this viable. Or do you recommend any other part? no switcher pls. What is the voltage dropout at this output? And what is the different between TPS and LP parts? BRgds + +HI Manimaran, Looking at the datasheet, this 5 to 4.85V at 600mA, would be marginal, and the device would be in Drop-out which means it would not have any effective PSRR. Our new TPS7A52 has a much lower drop-out and might be a better choice for this application. Under your load conditions, the drop-out would be ~67mV with the TPS7A52 (it is 150mV with the LP38502). The LP parts are a series of parts we inherited after acquiring National Instruments. The TPS parts are all designed and developed by TI. I hope this helps. + +Hi John, Thanks for the reply and the suggested part. TPS7A52 seems suite the design. There is charge pump in the LDO and this is the need for large cap (47uF). The LDO for WiFi an BT application, the concern is, is there any charge discharge time for the cap that can effect the supply to the RF Front end transmission. (Is this part suitable to power RF Front End?) The part is not available in Mouser or Digikey, am I correct on this? there is direct but from TI. BRgds + +Hi Manimaran, We designed this low noise part for RF power. So yes it is suitable. As for charging up the output capacitor, We have the following equation to estimate the startup time: We do have a PG pin that can be used to enable the RF circuit once the voltage is in regulation. As for discharge, It really depends on your circuit and load. I hope this helps. + +Hi John, All good, just on the Digikey and Mouser availability, do yo know when it will be available? BRgds + +Hi Manimaran, The RSP package just released a few weeks ago and currently only available on . The good news is thecompany now offers direct pricing so the pricing you see on should be cheaper than any of our distribution partners. Regards, + +Thanks John for the good info. I will close this discussion. + +Hi John, Sorry I thought I can close this, do you have Altium footprint and schematic symbol for this part, TPS7A52 . BRgds Manimaran + +HI Manimran, Here is what I could find. You may need to modify it. TPS7A52_RPS_package.intlib.zip I hope this helps. + diff --git a/data/text/DLP2/896276 b/data/text/DLP2/896276 new file mode 100644 index 0000000000000000000000000000000000000000..4436bf48e3398ab07084982bbb597a0b2ab07b52 --- /dev/null +++ b/data/text/DLP2/896276 @@ -0,0 +1,10 @@ +BQ28Z610: BQstudio shows not compatible + +Part Number: BQ28Z610 Dears, I use BQ Studio(1.3.86) and EV2300 to connect BQ28Z610. 2S battery, 8.4V DC source. Auto Detected Device shows NONE. If select target manually, it tell me: The detected device is not compatible with this application! Some actions could cause the device to lose communication permanently and enter an unrecoverable state. If I click OK and keep proceeding, my battery voltage can be read back, but when I try to change register value, shows target no ACK. I try bothcompany EVK and my own board, same issue. Did I miss any thing? Thank you. + +You would need to wake up the BQ28z610 device on the EVM. Press the button on the EVM before you launch the bqStudio. Andy + +Thanks Andy, I will try it. + +Hi Andy, I use another version of BQ28Z610 and problem solved, thanks. + diff --git a/data/text/DLP2/896284 b/data/text/DLP2/896284 new file mode 100644 index 0000000000000000000000000000000000000000..b806d8bf176ba6ed099d1785dcbae439ac1b0f6d --- /dev/null +++ b/data/text/DLP2/896284 @@ -0,0 +1,10 @@ +BQ40Z50-R1: The actual discharge overcurrent delay time is inconsistent with the set value, what is the problem? + +Part Number: BQ40Z50-R1 Hello: The actual discharge overcurrent delay time is inconsistent with the set value, what is the problem? + +Hi Can you help to check what is the discrepancy? it is possible for software overcurrent delay has 1 or 2 s discrepancy with the set value. + +The difference between the set value and the actual value is 1 second. Can the discharge overcurrent automatically recover the threshold through time? + +Hello User, I believe it can, can you refer to the TRM on the OCD protection recovery section? + diff --git a/data/text/DLP2/896391 b/data/text/DLP2/896391 new file mode 100644 index 0000000000000000000000000000000000000000..9081a0cfaa47886ac5b26e7216cd72e4ca40e45d --- /dev/null +++ b/data/text/DLP2/896391 @@ -0,0 +1,10 @@ +UCC28070: How to test loop current gain and phase + +Part Number: UCC28070 HI sir If I want to test Figure 6. Current Loop Gain (TdB (f)) and Figure 7. Current Loop Phase (qc (f)) in SLUA479A The Schematic(page 2) in SLUA479A ,How to point cconnection TKS UCC28070 Design Review 300W Interleaved PFC- slua479.pdf + +hi you can insert the signal in the attached. + +HI David Follow your suggestions，I actually tested it, please refer to the attachment for the results TKSUCC28070EVM current loop gain and phase measurement.docx + +HI Davin reminder + diff --git a/data/text/DLP2/896397 b/data/text/DLP2/896397 new file mode 100644 index 0000000000000000000000000000000000000000..8fb0dca0cc9f5fe7b9cf0ab1bf543b21aaba00a9 --- /dev/null +++ b/data/text/DLP2/896397 @@ -0,0 +1,12 @@ +TPS22912C: Land pattern + +Part Number: TPS22912C Hi, Would you tell me the information of land pattern and solder mask for TPS22912CYZVR ? There are no information on the datasheet. Datasheet: TPS22912C Regards, + +Hi, Welcome to E2E! I am currently looking for a land pattern example that can be used for the TPS22912C. I will post the information as soon as I receive it. Best regards, Andy Robles + +Hi, I was able to find a similar package, but in order to confirm if we can use the same land pattern I had to request some information that will take 2-3 days to get the data. I will get back to you as soon as I get the information. In the mean time I would like to promote on of our newer devices, the TPS22916C, which is very similar to the TPS22912C. The TPS22916C has a lower current consumption than the TPS22912C and offers an internal smart-on pin pull down resistor feature making an external pull down resistor necessary on the on-pin, which will reduce the BOM of the switching solution. In addition the TPS22916C has a similar RON values and similar rise time to support high capacitive loads. Let me know what you think. Best regards, Andy Robles + +Hi, For the TPS22912C you may use the landing pattern found on the datasheet of the TPS22908. Let me know if you have any questions! Best regards, Andy Robles + +Andy-san, Thank you for your information. I use the landing pattern on TPS22908 dataheet. Regards, Takashi Murakami + diff --git a/data/text/DLP2/896417 b/data/text/DLP2/896417 new file mode 100644 index 0000000000000000000000000000000000000000..dba403efc70491b7ec0694aed470ff8cbc3215bc --- /dev/null +++ b/data/text/DLP2/896417 @@ -0,0 +1,8 @@ +BQ21061: Safety timer function + +Part Number: BQ21061 Hello Team, I set Charger safety timer is 3H for a test after 3H charger stopped, but SAFETY_TMR_FAULT_FLAG is not set to 1. As figure below. If we want to get the sign when safety timer expires, how to deal with this register? Also I have some guessing and questions below, Please help comments. 1. From the figure above, Mask3 register is 0xde as the figure, it is 1101 1110, SAFETY_TMR_FAULT_M ASK is 0, so it means the interrupt is Masked, so the interrupt will never send. How about the register, will the register also mask and will never change? 2.Interrupt trigger based on status bit change is rising edge, does this mean the interrupt will send during this bit rising edge? 3. I guess the Safety tmr fault flag is be cleared, but I'm not sure when it be cleared, could you give your suggestions. Thank you very much. + +Hello Penn, The SAFETY_TMR_FAULT_FLAG is cleared after read. Are you sure the register was not read before the register dump? Mask3 being 0xDE means the safety timer Interrupt is NOT masked so the interrupt should be sent. The interrupt will be triggered when the flag is set. + +Hi Raheem Thanks a lot. + diff --git a/data/text/DLP2/896492 b/data/text/DLP2/896492 new file mode 100644 index 0000000000000000000000000000000000000000..27654da1b4fd7ac0c2803a2e5a96c8f9d5bd44a8 --- /dev/null +++ b/data/text/DLP2/896492 @@ -0,0 +1,10 @@ +TPS62060: Any concern on Low value of feedback resistors + +Part Number: TPS62060 Hi, According to TPS62060 datasheet P. 11, "To minimize the current through the feedback divider network, R2 should be within the range of 120 kΩ to 360 kΩ. The sum of R1 and R2 should not exceed ~1 MΩ, to keep the network robust against noise." If R2 is less than 120kohm, Please let us know what is concern. Thanks and best regards, M.HATTORI. + +Hi Hattori, When R2 is lower obviously there's an increase in current in the feedback loop and it is not desirable. Is there a specific reason to choose a lower value? May be if you could share more details on the application, it would be easier to understand. In any case, I would strongly recommend to follow datasheet specifications. Regards, Febin + +Hi Hattori, I hope I could answer your question. Please let me know if you need any further support. Regards, Febin + +Hi Hattori, I hope you could solve the issue. I will close this post due to inactivity. Please feel free to contact us for any technical support. Regards, Febin + diff --git a/data/text/DLP2/896560 b/data/text/DLP2/896560 new file mode 100644 index 0000000000000000000000000000000000000000..ae86c8fd507fa6c42d9a8870701b2379db0fc366 --- /dev/null +++ b/data/text/DLP2/896560 @@ -0,0 +1,8 @@ +LM5032: space EP or alternative + +Part Number: LM5032 Hello. Could you please advice, if there is a variant of LM5032 for using in space? Or could you please recommend any similar product, which has a space grade? Thank you. + +Hi Slava, I don't find the dual interleaved PWM controller with space grade standard. May I know what's converter specs, would you like to use other topology? Regards, Teng + +Hi Slave, I haven’t heard back from you for quite sometime, I’m assuming you were able to resolve your issue. If not, just post a reply below (or create a new thread if the thread has locked due to time-out) – thanks, Teng + diff --git a/data/text/DLP2/896622 b/data/text/DLP2/896622 new file mode 100644 index 0000000000000000000000000000000000000000..dbcd8f7902fcb2f9b87e84f2d099a81ce4d3d078 --- /dev/null +++ b/data/text/DLP2/896622 @@ -0,0 +1,20 @@ +DCA1000EVM: Difficulty connecting to device in mmWaveStudio GUI with AWR1642BOOST board + +Part Number: DCA1000EVM Hello, I am having a little difficulty with the DCA1000EVM. I am using it alongside the AWR1642BOOST EVM with the ultimate goal of vital detection. I would like to access the ADC data stream in MATLAB, however am having difficulty properly setting up the ADC1000 in the provided GUI first. I tried to follow the instructions outlined in the training video (/dca1000-training-video) but am having trouble with the Set Up DCA1000 feature on the left-hand side of the GUI (describe at 12:00). When I try to press ‘Connect, Reset and Configure’ I get the following error message in the output: This occurs when I press 'connect, reset and configure' in the following (note the lack of FPGA Version #): Additional information on my current configuration: The device also gets extremely warm very quickly . Does the board have any heatsinks? If not, should I be running it with a fan? I am concerned that this is related to the issues I am seeing above. Any insight you can provide into these issues will be much appreciated! Hope you are doing well during these crazy times. Warm Regards, -Amir Levine + +Amir, Did you make sure to set the IP address in the Network Connections part of the Control Panel in Windows? Can you also check all of your cable connections. You should have two power cables, two USB cables, and one Ethernet cable. You can refer to the DCA1000EVM Quick Start Guide: /lit/ml/spruik7/spruik7.pdf Ensure that your physical setup matches the one in the quick start guide. If you are using a laptop with a docking station, you will need to plug the Ethernet cable into the docking station. The preference would be to use the laptop disconnected from the docking station as it makes it easier to determine the correct Ethernet connection to changes in the Control Panel. Regards, Kyle + +Hi Kyle, Thank you for your response. I have connected the device with 2 microUSBs, 2 power supplies and an ethernet cable. I am also seeing all these ports appearing (with FTDI drivers installed) in the device manager. I have tried to configure the IP address as shown in the video (192.168.33.30 subnet 255.255.255.0) however I am unable to ping the device afterwards, making me suspect the issue exists here as you suggested. I am using a docking station (Ethernet to USB3.0), how will this change this process? Also, I was still wondering about the temperature issue? I am hesitant to play with the device too much as it heats up very quickly (too hot to touch in less than 30min). I was wondering if you could provide any normal/expected temperature behavior for the DCA1000EVM? Best Regards, -Amir + +Just a quick update- I am suspicious the issue is with the ethernet connection. The LEDs on the port do not light up and my computer shows "no ethernet connection"- Any suggestions as to what may be causing this? All other LEDs seem to be operating fine (according to /support/sensors/f/1023/t/747769?tisearch=e2e-sitesearch&keymatch=DCA1000EVM). I am using the following Ethernet docking station (works with my wifi router): https://www.amazon.com/AmazonBasics-1000-Gigabit-Ethernet-Adapter/dp/B00M77HMU0/ref=sr_1_1_sspa?crid=616QMOCM5KAT&keywords=ethernet+to+usb+adapter&qid=1583799551&s=electronics&sprefix=ethernet+to+u%2Celectronics%2C211&sr=1-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUFGR1JQMk03N0JNQTcmZW5jcnlwdGVkSWQ9QTA2Mjg4NDgzRlI0M1JCU1JJQUxTJmVuY3J5cHRlZEFkSWQ9QTAzNDQwMjkzSkxJQ0o4UkNWTjVUJndpZGdldE5hbWU9c3BfYXRmJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ== Thanks in advance -Amir + +mir, When it comes to configuring the IP address for use with the DCA1000EVM, you need to make sure you configure the right network connection. For example, on my PC, I see the following setup: In my case, I would modify the "Ethernet" connection. In the case where you have a USB to Ethernet adapter and you are connecting the DCA1000 to this adapter, your Network Connections panel might look like this: In this case, we would modify the "Ethernet 2" connection. This is because you are using the adapter to connect your PC to the DCA1000 and not the Ethernet adapter on your PC, should your PC have a Ethernet connector built in. I realize that not all laptops come with them. But use the example above for guidance. Please reply to this thread if you have been able to successfully resolve this issue or if there are additional questions. Regards, Kyle + +Hi Kyle, My machine does not have an ethernet port. Here is the network connections tab normally (without the adapter connected): With the adapter connected: This is also how the control panel looks when I connect the ethernet tothe DCA1000. For some reason, the "Network cable unplugged" does not change with everything powered up and connected. The LED on the ethernet port on the DCA1000 does not light up. I do not suspect the adapter nor cable- when I connect to my wifi modem using them, the modem registers and the cable status updates. I am not quite sure how/why this is happening, any troubleshooting suggestions are greatly appreciated! Best, -Amir + +Amir, At this point, you need to right click on the "Ethernet 5" connection and modify the IPv4 address to 192.168.33.30 and set the DNS to automatic. These steps are laid out in the DCA1000 Quick Start Guide found here: /lit/ml/spruik7/spruik7.pdf Please refer to these steps. The IP address should be hard coded before connecting the DCA10000EVM to your PC and powering it on. Regards, Kyle + +Hi Kyle, I have already configured the IP address, here's a screenshot of what it looks like on my end: I do not have the option to obtain DNS server automatically although it seems the same as in page 3 of the PDF you sent. I made sure to have this hardcoded before powering up the device as well. Please let me know of anything else to try. Best Regards, -Amir + +Amir, Your screen looks fine. You should try running the demo capture script that is included in mmWave Studio. You can find this script at this file location: C:\ti\mmwave_studio_02_01_00_00\mmWaveStudio\Scripts\DataCaptureDemo_xWR.lua Regards, Kyle + diff --git a/data/text/DLP2/896636 b/data/text/DLP2/896636 new file mode 100644 index 0000000000000000000000000000000000000000..0f73dc0ef9791c99e10ca06f9f8d5a32815367db --- /dev/null +++ b/data/text/DLP2/896636 @@ -0,0 +1,16 @@ +IWR1843BOOST: Traffic Monitoring Demo Crash + +Part Number: IWR1843BOOST Hi, We are evaluating IW1843 3D Traffic Monitoring demo and we found out it always crashes after running for some time (half an hour to two hours). Powerdown recovers it. We used the demo in mmwave_industrial_toolbox_4_2_0. Do you have any idea about what causes the crashes? Thanks + +I would like to add. We are also encountering a more serious issue wherein the sensor doesn't start after successfully sending the CFG file. The sensorStart command seems like breaks the USB connection and will reconnect. And then the matlab GUI will crash after this. Even if we power down the device multiple times, it cannot for a while. Note that we are using thecompany default config and demo. Is it somehow related to hardware? + +Hello Mary, Can you provide the log txt file from a time when it crashed after 30 min? Can you also provide the log txt frile from thwen the sensor doesn't start after sending the cfg file? In the case of not starting after sending the cfg file: Are you using executable pre-compiled GUI or the MATLAB source? It may be the case that in the executable if for some reason you had an issue where it crashed previously then the GUI was not able to release the data COM port correctly as it would after a normal exit. Then the COM port would be unavailable and cause the GUI to crash. If this occurs can you try restarting your PC (which forces all ports to be released) and starting the demo again Amanda + +Hello, I'm using the pre-compiled GUI. Attached is the log file when it crashed after running for some time. We've also noticed that crash will occur when initially we have the demo running with the device facing up, and when we move it try to move the device to face sideways and the gui will hang up. The log file doesn't log this error though. It will just completely stop. This is repatable. I also tried not running the GUI and just stream the data output in realterm. When we move the device, the data streamout in realterm will stop. So I guess, it's the firmware that crashes.For the USB issue, I will get back to you.5807.tm_console_log_21042020.txt + +I managed to find the line of code (CCS project) where the device hangs up when it is moved. It's the lines: objectdetection.c 1986: DPC_Objdet_Assert(objDetObj->dpmHandle, (objDetObj->interSubFrameProcToken == 0)); and objdetrangehwa.c 646: DPC_Objdet_Assert(objDetObj->dpmHandle, (objDetObj->interSubFrameProcToken == 0)); To quickly check, I tried to skip these assert lines by modifying objectdetectioninternal.h into: #define DPC_Objdet_Assert(handle, expression) //#define DPC_Objdet_Assert(handle, expression) { \ // _DPC_Objdet_Assert(handle, expression, \ // __FILE__, __LINE__); \ // DebugP_assert(expression); \ // } Somehow, it still looks like the demo works even though I move the device and the crash will not occur. I haven't tested the long time run yet (the other issue that I mentioned). However, I'm not sure if this is a deployable solution or how skipping this line affects other functionalities. Please help. + +The issue causing the crash was when you're moving the sensor yourself there are too many points being generated because to the sensor it appears the entire scene is moving. When there are too many points you may run out of time to complete the processing and output by UART before the chirping and processing begins for the next frame. You've removed the check that the processing has completed before beginning the next frame. I would recommend instead that you issue a sensorStop before moving the sensor so that this error doesn't occur or increase the available time by increasing the frame period or reducing the maximum number of detected points. Amanda + +Thanks for your suggestions. I will try that. In limiting the number of points, I want to confirm that you are referring to this line in the config file: trackingCfg 1 2 1000 20 67 105 50 How is the device selecting the X number of points to process in a given scene with a lot more points than the limit? By distance, snr, etc? + diff --git a/data/text/DLP2/896658 b/data/text/DLP2/896658 new file mode 100644 index 0000000000000000000000000000000000000000..e1c31cba94360f981aba78f869c15f04dab51840 --- /dev/null +++ b/data/text/DLP2/896658 @@ -0,0 +1,10 @@ +BQ25890H: BQ25890H USE？ + +Part Number: BQ25890H Our company USES TI's charging chip model BQ25890H, According to the design, the NTC is 10K, and the NTC resistance used by our battery is 100K The specification states that the values of RT1 and RT2 can be calculated to match the resistance of NTC, Please provide the resistance values of RT1 and RT2 at NTC=100K. I want to konw the formula is fixed，I just change the valve NTC？ others：can you provide the value of Vregn？ + +Hi, For RT1 and RT2 calculation, please refer to the calculator at /lit/zip/slurax7 and plug in the specified thermistor information accordingly. Thanks, Ning. + +sorry i can open it，Can you provide additional links or solutions？ + +Hi, Please refer to the attached. bq2589x calculation tools_1V1.xls Thanks, Ning. + diff --git a/data/text/DLP2/896725 b/data/text/DLP2/896725 new file mode 100644 index 0000000000000000000000000000000000000000..d78ba02bd13c7279f35db71126425c916af504e6 --- /dev/null +++ b/data/text/DLP2/896725 @@ -0,0 +1,10 @@ +BQ25896: BQ25896 I2C + +Part Number: BQ25896 Hi Sir, If MCU working voltage is 2.0V, Can BQ25896 support I2C interface? Thanks, Ian. + +Ian, When VBUS rises above VVBUS_UVLOZ (3.6V minimum) or BAT rises above VBAT_UVLOZ (2.3V minimum), the sleep comparator, battery depletion comparator and BATFET driver are active. I 2C interface is ready for communication and all the registers are reset to default value. Thanks, Ning. + +Hi Guy, Below Pin voltage level is based on VCC2 (2.0V), is it? STAT, /PG,SCL,SDA,CHG_INT + +Ian, VCC2 is the pull-up source. The BQ25896 needs valid power either at VBUS or VBAT as the specs shown in the earlier message in order to support I2C communication. Thanks, Ning. + diff --git a/data/text/DLP2/896752 b/data/text/DLP2/896752 new file mode 100644 index 0000000000000000000000000000000000000000..8b021e91d080913d097b5ae3a0453f20cb6467ea --- /dev/null +++ b/data/text/DLP2/896752 @@ -0,0 +1,24 @@ +TPS62175: Fail to output 5V + +Hi, I use TPS62175DQCR converting 24V DC to 5V DC to power the RS-485 signal chain block with reference to TIDM-1005 REV E1. It doesn't work. I measured voltages at different pins. The voltages at pins of VIN and EN are 24.35V. The voltages at pins of VOS and SLEEP are 0.08V. I can not find the reason. Please help me to find out something wrong or missing in my design. My schematic chart and pcb layout are shown as below. best regards Datïan + +Datian, The layout is not sufficient for a switching power supply. It will need to be re-done. Please see the layout guidelines and example in the datasheet. + +Hi John, Many thanks for your help. I'm a newbie to this work. Do you mean I need to make my layout as identical as possible to the recommend example illustrated as figure 62 in datasheet of shown as below? And do you think my schematic is correct, especially the resistors connected to pin of FB ? The value of resistors are 787K and 150K ohm in section 9.3.3.1 of data-sheet. However, the respective value of resistors are 2M and 383K ohm in schematic of TIDM-1005 REV E1. kind regards Datïan + +Datian, Yes you should follow those layout guidelines. Switching converters require a specific layout technique of both component placement and routing of traces and copper pour areas. In addition to the above picture, you should also include a dedicated ground plane on an internal or bottom side layer. Make sure to include some thermal bias for the thermal pad to connect to this GND plane. Please see the EVM users guide for more details /.../SLVU743. Your schematic looks ok. + +John, Thank you very much. I'll redo it. Warm Regards Datïan + +Hi John, I'v redone my layout for a small part of TPS62175 in my original design. Would you mind to have a glance at my layout ? Regards Datïan + +Data, It is probably much better, but it is difficult to tell from the individual pictures. Can you stack them? + +John, Thank you very much. Do you think it is necessary to enlarge the area of copper on top layer ? The size of this two-layer board is 6cm * 6cm. The thickness of copper is 1 oz. Best Regards Datïan + +Datian, I think that all looks ok. Let me know how it works when you get it built. + +John, Sure, I will. Looks like weekend can not stop you from work as me :p Best Regards Datïan + +Hi John, It works. The leds are lighted by 5V. Thank you very much for your powerful help. Do you think it is possible to reduce the area of copper if I choose 2oz as thickness of copper ? + diff --git a/data/text/DLP2/896786 b/data/text/DLP2/896786 new file mode 100644 index 0000000000000000000000000000000000000000..c4b941a37f6ff350d93088da27fa0ca15b1badac --- /dev/null +++ b/data/text/DLP2/896786 @@ -0,0 +1,16 @@ +LM74670-Q1: Replacement from diode bridge for low voltage (AC24V) input + +Part Number: LM74670-Q1 Hello E2E, We suggested the LM74670 to customer for change from diode bridge. The input voltage of target equipment is 24V-AC. Customer was drew schematic on TINA-TI, but it's can't runing. Doescompany have a simulation file for AC input bridge circuit? or, Cancompany point out the mistakes on the file? Regards, ACGUY test-2.TSC + +Hello, Thank you for your interest in LM74670-Q1 for diode bridge rectifier. I am looking into the TINA-TI simulation file, but would need some of the application information to simulate. What is maximum AC voltage and frequency of interest? Due to heavy influx of questions, allow us time till end of the week to get back. However, if you are really in a hurry, let us know we will try our best to support. Regards, Kari. + +Hello, I am working on this simulation and will get back as communicated by end of this week. Regards, Kari. + +Hello, I am able to run the simulation using the TINA file you have shared, but it is taking longer time due to 1uF used for VCAP. For the MOSFET chosen, 100nF can be used for C1,C2,C3 and C4. C5 capacitor also need to sized based on the maximum and minimum AC frequency and load current (maximum) Can you share the details, so that we can recommend C5? Regards, Kari. + +Hello Kari, Thank you for your reply. Application is power supply unit for amusement equipment. Related information and idea circuit block can be found at the following URL. /.../894934 Maximum input voltage is 26V that the voltage was changed by transformer from generally AC-inputted. Maximum output power is 300W. I want to replace from diode to LM74670 on customer's board. Please your cooperation. Best regards, ACGUY + +Hello, For 50/60Hz, LM74670 would work and can drive MOSFETs capable of handling 300W maximum power. Let me get back on the minimum hold up capacitance required at the output after the diode rectifier. Regards, Kari. + +Hi For 300W rectification on 24V AC supply, minimum 5mF of output capacitance is required after diode bridge when using LM74670-Q1 for rectification to work. Regards, Kari. + diff --git a/data/text/DLP2/896830 b/data/text/DLP2/896830 new file mode 100644 index 0000000000000000000000000000000000000000..aa2e6c0fe698ec8488bc4668b7fa2511567b25fc --- /dev/null +++ b/data/text/DLP2/896830 @@ -0,0 +1,12 @@ +WEBENCH® Tools/TPSM53603: TPSM53603 Simulation models + +Part Number: TPSM53603 Tool/software: WEBENCH® Design Tools Hicompany team! I know TPSM53603 simulation models are not available. Now I'm confused for 28V to 3.3V/3A,Which one i should use TPSM53603 or LMZM33603. Can i got simulation models of TPSM53603. I know w.r.t. size TPSM53603 is better. Please guide me with respect to EMI which one is better LMZM33603 or TPSM53603 because LMZM33603 is operating at low frequency than TPSM53603.So I think LMZM33603 is better w.r.t. EMI. Please guide me. Thanks and regards + +Hi Ahsan, If we were to compare the TPSM53603 (Figure 48) radiated EMI with the LMZM33603 (Figure 43) radiated EMI, the assumption that the LMZM33603 has better EMI performance than the TPSM53603 can be made since as you pointed out the LMZM33603 is operating at a lower frequency. There is no way to simulate EMI other than to base the assertion on the datasheet specifications. These radiated EMI result are from the actual standard EVM and tested at a local EMI chamber for accuracy. For thermals and size, I would suggest using the TPSM53603. You can also put a LDO at the end of the TPSM53603 to provide a clean output voltage with low noise. Here is an app note for reference. Regards, Jimmy + +Thank you Jimmy for your reply. But can I access any simulation models of TPSM53603? Thanks and regards + +There may be some work being done on the TPSM53603 device on WEBENCH designer to accurately match the datasheet component selection recommendation. This may be the reason why you are not able to simulate on WEBENCH designer right now. I would give this some time for the internal WEBENCH team to fix. It should be back up soon for simulation purposes. Regards, Jimmy + +Hi Ahsan, I haven't heard back from the team yet. I have pinged the again to get a status update on this. If I get any more information, I'll let you know. Regards, Jimmy + diff --git a/data/text/DLP2/896834 b/data/text/DLP2/896834 new file mode 100644 index 0000000000000000000000000000000000000000..c5a86c406056149f350800a3584f076bf35e5200 --- /dev/null +++ b/data/text/DLP2/896834 @@ -0,0 +1,12 @@ +Request informations difference of devices + +Hello I need a clarification on a device, we are currently using a device code: TPS2041AD I saw on the site that you give the code: TPS2042BD as an alternative to this. Do you have a document where it describes the main differences? I need to understand if I can use TPS2042BD on my application which previously provided the TPS2041AD many thanks Riccardo + +Hi Riccardo, TPS2042AD is NRND which means off shelf. You can use TPS2042BD instead which only the craft difference. For TI's policy, I will first click resolved button. If you have any other concern, contact me any time. If you think resolved, please help click 'Issue is solved button'. Thanks. + +Thanks for the replies the answers are enough thanks. I decided to try the device in modod id to be sure that I have no problems. Is it possible to have a TPS2042BD sampling so that I can verify it? On the website I searched but the samples did not find I could order them. thanks a lot Riccardo + +Hi Riccardo, See below link: https://tisamples./order/tisamples/en/search/?text=TPS2042BD&searchType= /store/ti/en/p/product/?p=TPS2042BD + +Ok perfect i have order the device perfect thanks + diff --git a/data/text/DLP2/896948 b/data/text/DLP2/896948 new file mode 100644 index 0000000000000000000000000000000000000000..ca0d04356b91b78e105d66606359b4e0621604a4 --- /dev/null +++ b/data/text/DLP2/896948 @@ -0,0 +1,12 @@ +TPS2121: Using this for selecting 2 different 24V supply voltages + +Part Number: TPS2121 The absolute ratings for TPS2121 indicates maximum input voltages of 24V. However, the recommended operational maximum voltage is 22V. I want to use this device to switch between two 24V power supplies with device configured for automatic switchover to power supply on input 2 in case of failure or removal of power supply on input 1. Will this be safe to do in the long run? The continuous load current will be around 3A, which can intermittently go upto 4A for few hundred milliseconds. The device is expected to power a medical device with expected continuous operation of many days. Thanks. Utpal + +Hi Utpal, As 24V is exceeding the recommended operating conditions of the device I would not recommend using it in your application. Operating the device at the absolute maximum rating conditions for extended periods may affect device reliability. I believe we may have an e-fuse device, TPS2663, than may be able to handle this application with integrated MOSFETs. I will reassign the thread and someone will get back to you on the possible implementation of the TPS2663 in your application. Best regards, Andy Robles + +Hi Utpal, TPS2663 can be used as per Figure 53 in the datasheet for power muxing two supply rails. Regards, Rakesh + +Thanks, I have designed circuit accordingly. Both my VIN and VSYS24 is 24V. Can you let me know what are design requirements for components marked in red circle. I am assuming when my main supply VIN is available you are putting the eFuse of auxillary supply (VSYS24) in overvoltage protection state, there by switching that power off from VOUT. Correct? + +Hi Utpal, Thanks for considering TPS2663. Yes, Your understanding is correct, OVP is used to keep the auxiliary power path in OFF mode. The VGS rating for Q3, Q5 should be 20V. Please refer Section "10.2.2.6 Selecting Q1, Q2 and TVS Clamp for Surge Protection" in the datasheet. The Q1 FET in your schematic works as source follower of the dVdT voltage of channel-1 (U2). The Vds rating of Q1 should be > max operating voltage of VSYS24. I suggest to use 50V rated FET. Regarding R13:- Higher value would help reduce the shunt current from VSYS24. Use 100kOhm for R13. Regards, Rakesh + diff --git a/data/text/DLP2/896982 b/data/text/DLP2/896982 new file mode 100644 index 0000000000000000000000000000000000000000..5b2a953ce67ac608678ba9994f6955ee63ec6ee5 --- /dev/null +++ b/data/text/DLP2/896982 @@ -0,0 +1,12 @@ +LM25180: I can't get it to function properly + +Part Number: LM25180 There is something wrong with the circuit but I cannot figure out what. The expected output voltage is 15V but the output i have is unregulated and changes based on the input voltage. (When the input voltage is 12V the output voltage is 10V) The switching frequency is stuck at 10-12 kHz. (It causes an audible high pitch) When i add a load of 220 ohm the output stops working . I have the same behaviour with all 3 of the modules I made. Can somebody help me? Below is my schematic: Below is the wave measured on the SW pin. + +Hi Floris, Did you design the circuit based on LM25180 Calculator: /tool/LM25180DESIGN-CALC Did you design the PCB layout by referring to LM25180EVM? I suggest you to apply one EVM and modify the circuit for your application. B R Andy + +Yes I designed the circuit based on the calculator I did not follow the evaluation module for the evaulaution module. But i did try to make de high-frequency signal paths short and keep de capacitors close. I worked with a bottom grondplane, maybe that is the problem? + +Hi Floris, The layout is not bad. Do you use MBR0520 on D6? this diode will block Vin-max plus Vout if XFMR has 1:1 ratio, so it should be 50V diode at Vin=24V, pls try it with 0.5A 100V diode. B R Andy + +Hi Floris, As Andy mentioned, the flyback diode should be higher voltage rating, either 60V or 100V (also depending on the leakage ringing). Also, the LM25180 has a peak current limit of 1.5A typical, hence why we recommend using a transformer with 2A sat current. In addition, 1uF is quite low for the input cap, try 10uF/50V. The output power is quite low here, 1.5W, so the LM5181 is generally more suitable (the peak primary current is 50% or 0.75A). In fact, the LM5181 is more aligned with your existing transformer with high mag inductance of 60uH and sat current of 1A. Take a look at the datasheet and quickstart calculator for that part - it is pin compatible with the LM25180. Regards, Tim + diff --git a/data/text/DLP2/896999 b/data/text/DLP2/896999 new file mode 100644 index 0000000000000000000000000000000000000000..4b33a1f959733744ea5ece24f6758961bfebf76c --- /dev/null +++ b/data/text/DLP2/896999 @@ -0,0 +1,8 @@ +UCC2897A: Control driven rectification + +Part Number: UCC2897A Hi, We are going to use PMP4844 design for our power requirement Vin 20-32V vout:24V Iout:5A. In PMP4844 control driven rectification is used. I am calculated the sync rectifier's power loss calculation and no of mosfets to be used based on the below link. /lit/an/slua535a/slua535a.pdf . This design guide have only self driver rectifier calculation, if I calculate the no of mosfet with is formulas, i get value like <0.5, but in the design 2 mosfets are used. Is there any separate power loss calculation for control driven sync rectification? + +Hi Sarumathi I don't know of any design guides that directly answer your question but you might take a look at https://www.infineon.com/dgdl/Infineon-MOSFET_OptiMOS_improving_efficiency_of_synchronous_rectification_by_analysis_of_the_MOSFET_power_loss_mechanism-AN-v03_00-EN.pdf?fileId=db3a304320d39d590121a671f2d90c38 which is an analysis of the MOSFET losses. The losses in the driver can be calculated according to the information in the DS - for example if you use the TPS28225 device Figure15 is a graph of driver Dissipated Power vs Switching Frequency. Hope this helps - please let us know if you have any further questions. Regards Colin + +Hi Sarumathi It's been a while since we heard from you so I'll assume you have been able to resolve your issue and I'm closing this post. You can always open a new, linked post if you wish to. Regards Colin + diff --git a/data/text/DLP2/897004 b/data/text/DLP2/897004 new file mode 100644 index 0000000000000000000000000000000000000000..8df19d6698adb37864453fdd7700fa25ee35e561 --- /dev/null +++ b/data/text/DLP2/897004 @@ -0,0 +1,14 @@ +BQ25611D: We ran into this problem when using the TINA simulation tool to simulate bq25611d (ERC error specification check, kept warning this error) and could not simulate + +Part Number: BQ25611D We ran into this problem when using the TINA simulation tool to simulate bq25611d (ERC error specification check, kept warning this error) and could not simulate + +Hi, may I ask where you got this tool? + +Hi, the tool is not supported with this device. Thanks. + +I now need the macro model of BQ25661D + +Did you mean BQ25611D? BQ25611D TINA simulation is not supported. + +BQ25611D SPICE model is not available. Battery chargers are very complicated with many control loops and operating modes. And the charger behaviors also dependent on battery characteristics. It is more efficient to do hardware evaluation. We will provide the technical support for the hardware development if there are questions. + diff --git a/data/text/DLP2/897006 b/data/text/DLP2/897006 new file mode 100644 index 0000000000000000000000000000000000000000..0e06963026cb2c927579574a7a9f7b8ef1d5ec98 --- /dev/null +++ b/data/text/DLP2/897006 @@ -0,0 +1,20 @@ +CCS/LM34936: PD charge fail on 5370 of Dell and Y9000K of Lenovo + +Part Number: LM34936 Tool/software: Code Composer Studio Hi,TI's expert: we're run into a trouble for the output capacitor choose and confirm the RC network of comp pin of LM34936 becuase it's PD charge fail on Dell_5370(inrush issue,see the capture1) when using low ESR(30mR) capacitor or re-work the RC network(R683 to 3.3K ,C482 to 300pF of comp pin , special the temperature rise to 57°C,the issue more terrible. if change the E- capacitor(EC13 on our shcematic) to above ESR.150mR, the 5370 of NB charge normal.but the Y9000K(Y900K,20V/5A) fail(detail see the below captures) i tried tune the RT/SYNC pin and COMP pin on LM34936,but get the result didn't compatibility them（Dell_5370 and Lenovo_Y9000K). as below circuit show to you reference. kindly advise you give me some comment or solution for the issue. thanks! 5370 of Dell charge OK when using the E-cap of Higher ESR(above 150mR) Y9000K charge fail when change E-cap of High ESR(above 150mR) on output power path. the Y9000K of NB charge OK when re-work the RC network of Comp pin of LM34936 and E-cap of Higher ESR(above 150mR) or change the E-cap of Lower ESR(30mR),it's same as effect(charge OK) the 5370 of NB charge fail when re-work the RC network of Comp pin of LM34936 and E-cap of Higher ESR(above 150mR) or change the E-cap of Lower ESR(30mR),it's same as effect(charge fail) + +Hi,TI's Expert: our PD solution has TPS65987D, the interal power switch was withsatand 10A inrush max. the spec,you can download it from as below link. thanks! + +Hi,TI's expert: sorry for lost the schematic upload. + +Hi Jianping, Sorry to hear you are having issue with your schematic. I have a few questions that should help me understand what is happening. 1. What is the input voltage during this operation? 2. Please confirm the switching frequency of the LM34936. It looks like there might be a few options. 3. What is the maximum load current for each of the 4 output voltages in the application Thanks, Garrett + +Hi,Garrett: thanks you reply! 1. the input voltage has 19v DC from adaptor. 2. the frequency be follow EVM of LM34936, it's 300K.(but i chang it to 380K if fix the issue) 3. the 5V,9V,12V 15V maximum current 3A; the 20V loading max 5A; + +Hi,Garrett: do you have any updated for the issue? + +Hi Jianping, I have been working with your localcompany field engineer on this issue. As to not duplicate the effort I am going to close this thread. From the LM34936 stand point it looked like the loop compensation needed tuned for the application. Thanks, Garrett + +Hi,Grrett: may you share the AE information to me for contact them? regarding loop compensation tune methodology, could you share some document of LM34936 to us for study ? thanks! + +Hi Jianping, I am working with Antony Lin. To estimate the loop of the LM34936, I suggest using the LM5176 quick-start calculator The LM5176 and LM34936 have have the same control loop architecture so the quick-start calculator can be used interchangeably. Thanks, Garrett + diff --git a/data/text/DLP2/897029 b/data/text/DLP2/897029 new file mode 100644 index 0000000000000000000000000000000000000000..da82adfa0866a873d22d334627ff95f4d3dad934 --- /dev/null +++ b/data/text/DLP2/897029 @@ -0,0 +1,12 @@ +IWR1843: Can SCI B used for both transmit and receive? + +Part Number: IWR1843 I want to use both SCI-A and SCI-B as standard UART interface for transmit and receive. But when I check the UART driver in mmwave_sdk_03_03_00_03, it mentioned: SCIB can only used as TX-only. see below for your reference. I want to ask whether this is only "driver" limitation? or the silicon has some physical limitation, like SCIB do not contains receive block inside. If it is "driver" limitation, can I just simpliy modify SCIB to UartSci_Duplexity_FULL, and rebuild the driver. Then I could use SCIB as RX as well? Thanks and Best Regards Dong /** * @brief This is the XWR18xx MSS specific UART configuration. There are * 2 UART instances available on the MSS. UART1 is tied to SCI-A and UART3 is * tied to SCI-B. This should *NOT* be modified by the customer. */ UartSci_HwCfg gUartSciHwCfg[2] = { /* UART1 Hardware configuration: * - Capable of sending and receiving data * - PIN MUX is required */ { ((volatile SCIRegs*)SOC_XWR18XX_MSS_SCI_A_BASE_ADDRESS), UartSci_Duplexity_FULL, UartSci_PinMux_REQUIRED, SOC_XWR18XX_MSS_SCIA_LVL0_INT, SOC_XWR18XX_MSS_SCIA_TX_DMA_REQ, SOC_XWR18XX_MSS_SCIA_RX_DMA_REQ, &UartSci_openDMA, &UartSci_closeDMA, &UartSci_isDMAEnabled, &UartSci_initiateRxDMA, &UartSci_initiateTxDMA }, /* UART3 Hardware configuration: * - Capable of only sending data * - PIN MUX is required */ { ((volatile SCIRegs*)SOC_XWR18XX_MSS_SCI_B_BASE_ADDRESS), UartSci_Duplexity_TX_ONLY, UartSci_PinMux_REQUIRED, SOC_XWR18XX_MSS_SCIB_LVL0_INT, SOC_XWR18XX_MSS_SCIB_TX_DMA_REQ, SOC_XWR18XX_MSS_SCIB_RX_DMA_REQ, &UartSci_openDMA, &UartSci_closeDMA, &UartSci_isDMAEnabled, &UartSci_initiateRxDMA, &UartSci_initiateTxDMA } }; + +Hi, I need to look into this, however can you provide some more details about your use case? how do you intend to send Data if you are re-purposing the data UART? BR, Charles O + +Thanks for the response. Charles. In my current system structure, I plan to use SCIA as a debugger inferface during code development, but use SCIB as communication interface between IWR1843 with application board. Application board will issue "customerized command" to IWR1843, it will reply back with the measurement result. IWR1843 does not need to send back all the measurement data per frame as the demo does. But only reponse based on the "query command". Best Regards Dong + +Hi, Table 4.4 page 22 of the datasheet shows both TX and RX for UART A and B, so you should be able to configure the pinmux to use multiple UART. You will have update the driver to support full duplex on SCIB. BR, Charles O + +Thanks. Charles. Got it. + diff --git a/data/text/DLP2/897042 b/data/text/DLP2/897042 new file mode 100644 index 0000000000000000000000000000000000000000..d7e43a3697c1204923f64d626f35b4de7f969ec4 --- /dev/null +++ b/data/text/DLP2/897042 @@ -0,0 +1,22 @@ +BQ34Z100-G1: AUTOCALIBRATION + +Part Number: BQ34Z100-G1 Hi, I am using a BQ34z100-g1 with an 8s2p LiFePO4 batteries. The nominal capacity of the battery is 3200mAh. My question is about the autocalibration of the bq34z100-g1. Here is what the datasheet says about it The gas gauge performs a single offset calibration when: OPTION 1 1. The interface lines stay low for a minimum of Bus Low Time and 2. VSR > Deadband. OPTION 2 1. The condition of AverageCurrent() ≤ Autocal Min Current and 2. {Voltage change since last offset calibration ≥ Delta Voltage} or {temperature change since last offset calibration is greater than Delta Temperature for ≥ Autocal Time}. My question is about the following parameters: - Bus Low Time - Autocal Min Current - Delta Voltage - Autocal Time Where are these parameters specified in the datahseet? what are its default values? Thank you very much, Best regards, + +Hi Gorka, As far as I can tell, all the parameters should be private and that's why you cannot see them in the datasheet or TRM. Bus Low Time should 5 seconds. I need to check internally and see if can find the default values of other parameters. Andy + +Hi Andy, Ok, check that please. I am very interested in knowing when autocalibration occurs. I have small fixes in current (current droping form 25mA to 20mA) around 1 minute after powering the device and I want to know if it is due to autocalibration. Can you confirm me this point? Best regards, + +Nobody?? + +Hi Gorka, Can you provide a bqStudio log file so that we can check to see whether it is due to autocalibration? Andy + +Hi Andy, I can not do that log in this moment but I can confirm you that after this "current adjustment" the value of the CC offset value has changed. The rest of the calibration parameters (CC Gain, CC Delta and Board offset) remains unchanged. Is this due to an autocalibration process? I need to know that, it is very important to know the value of this parameters - Autocal Min Current - Delta Voltage - Autocal Time Can you please provide me these parameters values? Regards, + +The autocalibration will be performed when these conditions are met. 1. AverageCurrent() < 100 mA for 60 s 2. Voltage change since last offset calibration ≥ 256 mV for ≥60s OR Temperature change since last offset calibration is greater than 8°C for ≥ 60 s Andy + +Thanks Andy, I still have a doubt of how autocalibrations is performed. 1. First condition is clear. 2. Second condition is not so clear for me. What I can read in the TRM is "voltage offset error across SRP and SRN from time-to-time as operating conditions change. It subtracts the resulting offset error from normal sense resistor voltage, VSR, for maximum measurement accuracy." What does the bq34z100-g1 exactly do? Takes measurements in SRP and SRN, ok, but what does it do with them? Imagine current is 20mA, with a sensor resistor of 10mOhms we have theoretically 0V (the measurement will not be exactly 0) in SRN and 0.2mV in SRP. How this autocalibration use these values? Regards, + +Andy? anybody else? + +Gorka, When the gauge does an AutoCalibration it internally shorts the SRN/SRP pins to measure any offset. since we are internally shorting the pins the ADC raw counts should return as 0. anything at that point would be calibrated out. If you see the CC offset value update a CC cal was performed. Thanks, Eric Vos + diff --git a/data/text/DLP2/897068 b/data/text/DLP2/897068 new file mode 100644 index 0000000000000000000000000000000000000000..463b8ad6cc0de92534daf0cfd9724f704598da4f --- /dev/null +++ b/data/text/DLP2/897068 @@ -0,0 +1,8 @@ +BQ21040: when I switched the input to 25V, I broke the BQ21040, When the input voltage is 30V, what is the test condition? + +Part Number: BQ21040 The parameters in the BQ21040 specification book indicate that the maximum input voltage can reach 30V, But when I switched the input to 25V, I broke the BQ21040, When the input voltage is 30V, what is the test condition? + +Is it possible that a transient over 30 V occurred during the test? The input capacitor used also needs to be appropriately rated to handle 25V. Best, + +Hi there, I haven’t heard back from you, I’m assuming you were able to resolve your issue. If not, just post a reply below or create a new thread if the thread has locked due to time-out. Regards, + diff --git a/data/text/DLP2/897076 b/data/text/DLP2/897076 new file mode 100644 index 0000000000000000000000000000000000000000..4232c77692e0dc5ad01d9f907076cb5300cee7eb --- /dev/null +++ b/data/text/DLP2/897076 @@ -0,0 +1,16 @@ +UCC27211: About capacitor between HB pin and HS pin + +Part Number: UCC27211 Hi, I am considering a circuit that uses the UCC27211 device. I ask about the capacitance of the capacitor connected between the HB and HS pins. The data sheet states that for this capacitance, a capacitance of 0.022uF to 0.1uF should be used. However, since I want to drive the High Side Switch on for a longer time, I want to use the capacitance of 4.7uF. Is it okay to use 4.7uF? Best regards, + +Hello Kaji, It is OK to use larger HB-HS capacitance than is listed in the datasheet typical value range. There are however important considerations using large boot capacitance values. It takes a longer time to charge the boot capacitor initially when the converter starts the 1st cycles, when the HB capacitor is charged initially, the charge is supplied by the VDD capacitor so the VDD capacitor needs to be sized to minimize the voltage drop. We usually recommend VDD cap 10x the boot capacitance. In this application is the switching frequency always low, which requires the long HO on time? I would recommend calculating the required boot capacitance using the design procedure in the UCC27282 datasheet section 8.2.2. The datasheet can be found here: /lit/ds/symlink/ucc27282.pdf The process is based on VDD and the switching frequency, and takes into account the quiescent current of the HO driver. For the UCC27211 use an IHB of 0.1mA to calculate the boot capacitance. If a lower HB capacitance can be used, we recommend that to allow faster charging of the HB capacitance on start up. Confirm if this addresses your questions, or you can post additional questions on this thread. Regards, + +Thank you for your reply. I would like to ask you an additional question. I understand that the device of UCC27211 can use 4.7uF. Is this understanding correct? It has been pointed out that the problem that the voltage drop of the VDD capacitor becomes large at startup, but the problem that the inrush current of the bootstrap diode becomes large at startup is not pointed out. The larger the capacitor, the larger the current flowing in the device's built-in bootstrap diode. How do you deal with diodes? Is there a margin in the current capacity of the diode? Best regards, + +Hello Kaji, The UCC27211 can have a larger boot capacitor than the typical suggested range. The boot diode is capable of high peak currents, and this high current should only happen on the initial cycle(s) when charging the boot capacitor from 0V. I do suggest you look at the boot capacitor value based on my previous post, to see if you need this large value capacitance. I assume your application will be running at low frequency (<40kHz), can you confirm your operating frequency? We would not suggest, or do you need a large boot capacitance with higher switching frequencies such as in power convertors. If you desire, I can provide the required capacitance if you can provide me the following: VDD voltage, MOSFET part number (# number of devices in parallel), switching frequency, and HO expected maximum duty cycle. Regards, + +Could you please activate this thread for additional questions? I got the following answer from you. We would not suggest, or do you need a large boot capacitance with higher switching frequencies such as in power convertors. Please provide details on why you are not recommended for the above content. Is it because the large capacitance has a large ESR? In that case, can it be solved by connecting an additional small capacitance with low ESR in parallel? I have already shipped the product, so I would like to proceed with the current circuit constants. Boot capacitance 4.7uF, operating frequency 10kHz. Best regards, + +Part Number: UCC27211 Hi, I previously got the following answer in this thread. “I don't recommend if you have a high switching frequency like a power converter and you need a large boot capacitance.” Please provide details on why the above content is not recommended. Isn't it recommended to use a large capacitance because the ESR becomes large? If so, can this be solved by adding an additional small capacitor with low ESR in parallel? I have already shipped the product, so I would like to proceed with the current circuit constants. Current constants: boot capacitance 4.7uF, operating frequency 10kHz. Best regards, + +Hello Kaji, With your application with switching frequency of 10kHz, the use of a larger boot capacitance will be OK. The concern I mention before, if you have higher switching frequency, as in a power converter, with a large boot capacitance it will take more time for the boot capacitor to charge on the initial cycles. Also with higher switching frequencies you should not need a larger boot capacitance since the HO on times will not be long duration. Confirm if this addresses your question, or you can post additional questions on this thread. Regards, + diff --git a/data/text/DLP2/897077 b/data/text/DLP2/897077 new file mode 100644 index 0000000000000000000000000000000000000000..001d42e9101a927913346d6851ce1c62f1de275d --- /dev/null +++ b/data/text/DLP2/897077 @@ -0,0 +1,16 @@ +UCC3895: UCC3895DW + +Part Number: UCC3895 Hi, We have just bought 1000 pcs of this IC. They were made in a Malaysia factory with seal date 05.24.18. MSL 2 is the code, we received these unsealed, when where they opened ? The production code for these is "85Z04NV". "85" is date code, May 2018. But what about the rest ? We have earlier tried to unrole a whole roll of ic's and seen that the production code changes inside the roll, not the first two digits indicating year and month but one of the following digits, therefore the question. We have previously purchased this IC in whole rolls, rolls made in Malaysia and rolls made in Taiwan. There is a huge difference in the appearance of the ICs. The ICs from Taiwan have a pin 1 dot in the molding and the printed text includes a Texax logo, the IC's from Malaysia has not. Why this difference ? Thanks. With best regards Carsten Bruun Technician Horsodan Elektronik A/S + +Hi Casten I'll have to do some checking on this - please bear with me for a few days and I'll get back to you. Regards Colin + +Hi Carsten I had to pass on this question to another department - they had a question - as follows. Can you get the picture please ? 'PDC has replied they used MSL 2 zip lock bags. Can you please ask customer to provide us the picture?' Thanks Colin + +Hi Colin, Attached is a picture of the two versions. With best regards Carsten./cfs-file/__key/communityserver-discussions-components-files/196/UCC3895DWTaiwan_2D00_Malaysia.pdf + +Hi Carsten Unfortunately, I got an error when I tried to follow the link. Probably the best thing to do is for you to email the images to me directly at colingillmor@ Regards Colin + +Hi Carsten Thanks for emailing me the pictures - I've passed them on. My contact here asked for a picture of the zip lok bags rather than the ICs themselves - is there any chance that you could take a picture of the bags please. given the previous experience, can you email the images to me directly at colingillmor@ Thanks + +Hi Carsten We have decided to continue this topic via email and I'm closing this thread. Thanks for the picture of the Zip-Lok (MSL2) bag that you sent to me. I've replied via email back to you and to our Customer Quality Engineer. Regards Colin + diff --git a/data/text/DLP2/897100 b/data/text/DLP2/897100 new file mode 100644 index 0000000000000000000000000000000000000000..dbcb94492b66d95e39df7d9c642539cf5936774b --- /dev/null +++ b/data/text/DLP2/897100 @@ -0,0 +1,12 @@ +PCB Layout Guidelines for Merging High Voltage and DC Signal in single Board. + +Hi, In our Project, we are using Input Voltage 230V line having Common mode choke, differential noise removal and filter. We are generating Voltage 24V @ 2A. From 24V ---> 5V ---->3.3V ------> 1.5V -----> 1.1V. The voltage rails 5V, 1.5V,3.3V and 1.1V are going for Digital IC and Digital section. Questions : 1. PCB Layout guidelines for combining the High voltage AC and DC in a single board? Please provide resources ( layout files, schematics) for merging the boards. 2. What are the challenges and how to overcome challenges involved in " PCB Layout guidelines for combining the High voltage AC and DC in a single board"?Combination of the High Voltage and Digital Board 3. How to isolate the High Voltage and Low voltage rails in Board? The High voltage AC should add noise and disturb the Digital lines 4. How to choose the Stack up of PCB for the Merging High Voltage and DC Signal board? + +Shreyas For the AC/DC power conversion a design like PMP9041. This design uses our offline flyback controller UCC28710 to step the high voltage AC down to a low voltage DC while providing galvanic isolation. Please refer to this reference design for PCB layout example. It's recommended to keep physical separation between high voltage and low voltage circuits across the isolation boundary to prevent interference. Below are some additional collateral we recommend reviewing to learn fundamentals of AC/DC power conversion Video on flyback basics /understanding-basics-flyback-converter PCB layout techniques - recommendations on how to minimize noise coupling to digital lines Part 1: /pcb-layout-smps-part-1-2?context=1134585-1139234-1136886 Part 2: /pcb-layout-smps-part-2-2?context=1134585-1139234-1136887 PSDS papers on flyback converters /seclit/ml/slup261/slup261.pdf /seclit/ml/slup302/slup302.pdf Best Regards, Eric + +Hi Eric Faraci, Thanks I went through PCB layout techniques for SMPS and flyback converters papers that you mentioned. I need information on PCB Stackup considerations for Merging the Digital circuit (Digital signal of IC like MCU and other IC's) and High Voltage (440V). I want info on how to merge the boards not information on individual topics like PCB layout of SMPS or Digital circuit. Please answer on Merging the High Voltage (440V) and digital circuit on a Single PCB . + +Shreyas We recommend that you use an isolated switched mode power supply, like a flyback with UCC28742, to convert 440V to low voltage DC. This flyback power stage will provide galvanic isolation. On the low voltage DC side, the voltage will be low enough to power your digital circuit and not corrupt signal quality. To insure that there is no coupling of high voltage signals to the low voltage side it's recommended that the PCB layout is designed in such a way where there is a physical line between HV and LV sides. Only components that cross the isolation boundary, such as the transformer, y-capacitor and optocoupler cross this boundary. Best Regards, Eric + +Hi Eric, In our project, we are using an isolated Flyback converter only. 1. Can you please elaborate and explain the statement " To ensure that there is no coupling of high voltage signals to the low voltage side it's recommended that the PCB layout is designed in such a way where there is a physical line between HV and LV sides. " ?. 2. Please give some reference designs and reference PCB layout to understand the above statement (Point 1)? 3. Do you think the stack-up of the PCB for high voltage and low voltage (Digital IC's like MCU, Processor) is the same ? Like, when we are talking about Multilayer board in terms of Layers, like FR4 material and Core in PCB is it same for even High Voltage also? 4. Please tell me what is stack-up (PCB) to be considered ( in terms of layer guidelines) for merging High voltage and low voltage circuit section? + diff --git a/data/text/DLP2/897117 b/data/text/DLP2/897117 new file mode 100644 index 0000000000000000000000000000000000000000..8e325874a193d2563ee1ad77dfcb7e5293bdbf24 --- /dev/null +++ b/data/text/DLP2/897117 @@ -0,0 +1,24 @@ +IWR6843ISK: How can I reduce the baud rate of the data output serial port? + +Part Number: IWR6843ISK Hi there, Right now, I'm using the MCU to communicate with the IWR6843ISK EVM to configure and retrieve data.After referring to the evm guide, I put the IWR6843ISK evm in the "Position for 40 pin LP/BP" mode. I sent the pin configuration instruction to the J5 of IWR6843ISK evm board through the MCU serial port 1. After the configuration, the data should be output from the MSS LOGGER(pin 9) of J6. According to the IWR6843ISK EVM program, the baud rate of the data output serial port is 921600. But my MCU can only receive 115200 baud at most. How can I reduce the baud rate of the data output serial port? I hope I can get help, thank you very much, looking forward to your reply. Thanks! + +Hi, Please source code for the demo you are running, you should be able to change the baud rate in Main.C /support/sensors/f/1023/t/866693 BR, Charles O + +Hi,Charles O . I used the ES2.0 version of IWR6843ISK EVM and the C:\ti\mmwave_industrial_toolbox_4_1_0__win\mmwave_industrial_toolbox_4_1_0\labs\people_counting\68xx_people_counting\prebuilt_binaries\pplcount_lab_xwr68xx.bin file was flash memory. Download the firmware according to the Developer's Guide of the pplcount_user_guide.pdf document, use the Code Composer Studio version 8.1.0, want to change the baud rate in main.c. However, the following error occurred at the beginning of the import. I hope to get your help. Thank you very much. Thanks! + +Hi, Did you try updating CCS as it says in the error? Also for debug you need to flash the debug bin, not the prebuilt bin. Please follow the right process as noted in the TIREX page you referenced. BR, Charles O + +Hi, Charles O. Yes, the problem of not being able to import the project after the CSS update has been resolved. For the baud rate you described for modifying the data serial port in the main file, I imported and rebuilt the CSS and MSS projects as described in the user guide. Then I changed the baud rate of the data serial port in the mss_main.c file in the 68xx_pplcount_mss project from 921600 to 115200, and rebuilt to generate the new pplcount_lab_xwr68xx.bin file. 1. Is it as long as I rebuild it? Bin file flash into iwr6843isk evm, iwr6843isk evm can achieve data serial port to 115200 output? 3. During the flash drive of the pplcount_lab_xwr68xx.bin file to the iwr6843isk evm board, my UniFlash 6.0.0 remained stuck on the "connected to com port" while executing the flash command (that is, after pressing the button).How can I solve this problem? (I've also had good success with UniFlash recently.) I hope to get your help. Thank you very much. Thanks! + +Hi, Do you have other programs running that could be using the COM Port? Also see related link below about UART Function BR, Charles O + +Hi,Charles O. I tried to restart the computer, but the error still occurred while making sure no program was using the serial port. I've also tried to write on other PCS or laptops, and this has happened. Therefore, I am very distressed. I hope I can get your help to find the problem as soon as possible. I am looking forward to your reply. Thank you for your help! + +Hi,Charles O. According to your description, I tried to restart the PC computer (under the condition that no com port was occupied), and re-used uniflash for flash storage. The flash process was still stuck in "Connected to com port", and the flash could not be successfully applied.Using a laptop to do the same thing also doesn't work with flash memory. I really look forward to your help, I will be very grateful! I am looking forward to your reply. Thank you for your help! + +Hi,Charles O. First, I rebooted the laptop (win7_64-bit) and connected the usb to the computer port. I charged the IWR6843ISK EVM device and pressed the NRST button to reset it. Then, after ensuring that the device manager has recognized the xds110 uart port and xds110 data port, open the Uniflash 6.0.0 flash pplcount_lab_xwr68xx.bin file, the flash will still be stuck in the "Connected to com port" in the flash process, and the flash cannot succeed. But, will pop up a "FlashPythonSubprocess. Exe has stopped working" prompt dialog box. I'm not sure if this is the reason I can't flash. I really look forward to your help, I will be very grateful! I am looking forward to your reply. Thank you for your help! + +Hi,Charles O. First, I rebooted the laptop (win7_64-bit) and connected the usb to the computer port. I charged the IWR6843ISK EVM device and pressed the NRST button to reset it. Then, after ensuring that the device manager has recognized the xds110 uart port and xds110 data port, open the Uniflash 6.0.0 flash pplcount_lab_xwr68xx.bin file, the flash will still be stuck in the "Connected to com port" in the flash process, and the flash cannot succeed. But, will pop up a "FlashPythonSubprocess. Exe has stopped working" prompt dialog box. I'm not sure if this is the reason I can't flash. I really look forward to your help, I will be very grateful! I am looking forward to your reply. Thank you for your help! + +Hi, Can you try installing UNIFLASH on a different PC? it appears uniflash isn't working properly on your PC. BR, Charles O + diff --git a/data/text/DLP2/897136 b/data/text/DLP2/897136 new file mode 100644 index 0000000000000000000000000000000000000000..f5574c452c76c5e7d1b46a41c910cdc9a5b9c743 --- /dev/null +++ b/data/text/DLP2/897136 @@ -0,0 +1,10 @@ +How to combine High and Low Voltage in a Single Design + +Hi, In our Project, we are using Input Voltage 230V line having Common mode choke, differential noise removal and filter. We are generating Voltage 24V @ 2A. From 24V ---> 5V ---->3.3V ------> 1.5V -----> 1.1V. The voltage rails 5V, 1.5V,3.3V and 1.1V are going for Digital IC and Digital section. Questions : 1. PCB Layout guidelines for combining the High voltage AC and DC in a single board? Please provide resources ( layout files, schematics) for merging the boards. 2. What are the challenges and how to overcome challenges involved in " PCB Layout guidelines for combining the High voltage AC and DC in a single board"?Combination of the High Voltage and Digital Board 3. How to isolate the High Voltage and Low voltage rails in Board? The High voltage AC should add noise and disturb the Digital lines 4. How to choose the Stack up of PCB for the Merging High Voltage and DC Signal board? + +Sereyas I see that you have asked this question in two separate E2E posts. I will respond to this question in the other post here /support/power-management/f/196/t/897100 Best Regards, Eric + +Hi Eric Faraci, Thanks I went through PCB layout techniques for SMPS and flyback converters papers that you mentioned. I need information on PCB Stackup considerations for Merging the Digital circuit (Digital signal of IC like MCU and other IC's) and High Voltage (440V). I want info on how to merge the boards not information on individual topics like PCB layout of SMPS or Digital circuit. Please answer on Merging the High Voltage (440V) and digital circuit on a Single PCB . + +Sereyas You have asked this question in two separate E2E posts. I will respond to this question in the other post here /support/power-management/f/196/t/897100 In the future we recommend that you post just one E2E thread per question. Best Regards, Eric + diff --git a/data/text/DLP2/897169 b/data/text/DLP2/897169 new file mode 100644 index 0000000000000000000000000000000000000000..93b70fcf73f967a4d0e0b102d2a07c47e67bfebb --- /dev/null +++ b/data/text/DLP2/897169 @@ -0,0 +1,14 @@ +CSD19536KTT: Qoss Calculation and check from datasheet + +Part Number: CSD19536KTT Hi, I am trying to calculate Qoss value from datasheet for type number is Csd19536ktt Mosfet. Could you please inform me about below subject? Qoss is 335nC for 50V according to the datasheet. But when I tried to calculate that value from Figure-5, I find it about 250nc. Which value is correct? And how do I calculate Qoss? Regards Onur + +Hi Onur, Thanks for your interest incompany FETs. I'm looking into this one and have an email into a colleague. It should be relatively simple to calculate Qoss from the Coss curve in Figure 5 of the datasheet. I'm not certain why you're getting a discrepancy. I will update you as soon as I have more information. + +Hi Onur, I checked with the engineer who made the Coss and Qoss measurements for the values in the datasheet. I do not want to share this on e2e as it is a public forum. I am going to send you a friend request and will share this information with you in a private message after you accept the request. + +Hi John, Thank you so much for your interest. + +Hi Onur, Thanks again for your interest incompany FETs. Following up to see if we have resolved your issues. + +Thank you for your interest. + diff --git a/data/text/DLP2/897225 b/data/text/DLP2/897225 new file mode 100644 index 0000000000000000000000000000000000000000..2b1184f90be4eceb7115c232442442893d30220b --- /dev/null +++ b/data/text/DLP2/897225 @@ -0,0 +1,12 @@ +BQ35100: Sense resistor value check? + +Part Number: BQ35100 The datasheet in the 8.2.2.5 Current Sense Resistor Selection says "The BQ35100 device calculates current through measuring a voltage across a small resistor in series with the battery. The default value is 100 mΩ. To maximize current measurement accuracy, the ideal value is calculated as: RSENSE (mΩ) = V(SR)Max / Peak Load Current (mA) Where V(SR) MAX = 125 mV" I am concerned that we may not have a sufficient voltage drop to make this chip work correctly as we have a buck/boost converter between the battery and the comms module that shapes the current we sample. We are transmitting for 80-100ms with ~190mA current sourced from the buck/boost and its Vout caps. The buck/boost will reduce this current value on its Vin input which is connected to the battery. What minimum voltage drop across the sense resistor would still work for the BQ35100 chip? Shall we use an op-amp to boost the Rsense volage or stay with 100 mΩ ? + +Julio, There is no magic number we need to see because as you say the senseR value can change and we can calibrate to it. What is the current that you expect to see across the senseR through the buck/boost? ideally we would like to size the senseR to exercise as much of the ADC's full range as we can. I would not add an op-amp to the RSense at this point. you should be able to size correctly to measure. Thanks, Eric Vos + +Thanks Eric, We see 80mA to 100mA peak current. See the image below. Is 0.1 ohm sensing resistor going to work then? + +Julio, The amplitude should be fine. At 80-100mA the gauge will be able to measure that accurately. The issue with the image you provided is the duration. The load must be at least 32mSec long. It is also critical the battery voltage drops at least 50mV under load Thanks, Eric Vos + +Eric, Thanks for the feedback, it will use the following battery : https://www.ultralifecorporation.com/ECommerce/product/er34615m/batt-li-socl2dsshr The load will jump from 0.15mA to the pulse shown in the plot above. It appears will be ok with the 50mV drop. The load + diff --git a/data/text/DLP2/897239 b/data/text/DLP2/897239 new file mode 100644 index 0000000000000000000000000000000000000000..10003a13b4b94d4f09452e5b253d743c552931b6 --- /dev/null +++ b/data/text/DLP2/897239 @@ -0,0 +1,18 @@ +LM46002: OV detection function + +Part Number: LM46002 Hi team, Could you kindly advise for more detail of the OV detection function of LM46002 ? Our customer is looking for the devices with OVP function. Thank you and best regards, Michiaki + +Hello This device has an OVP function that will shut off the switching when the power good upper threshold is reached. Thanks + +Hi I couldn’t see there is shutdown mode at OV condition in the datasheet. Could you kindly advise where there is description. In my understanding, LM46002 has OV detection but only turn on PGOOD switch. Thank you and best regards, Michiaki. + +Hello The description of this feature is not in the data sheet. However, the functionality is in the regulator. Thanks + +Hi Could you share the timing chart at OVP protection ? Thank you and best regards, Michiaki + +Hello I am not sure that we have details about the timing of the OVP function. However, once the output voltage reaches Vpgood-high and after a delay of Tpgood-rise, the device should stop switching. The same should occur at the falling edge. If this function is critical for your application, then you will need to test it on the bench with an EVM. Thanks + +Hi Could you look into the detail of the timing of the OVP function ? And our customer requested us to describe the OVP function in the datasheet. Our customer is concerned about the misleading because there is no description about LM46002 should be shutdown at overvoltage state in the datasheet. Your understanding would be highly appreciated. Thank you and best regards, Michiaki + +Hello We are working on this through direct email. I will close this post Thanks + diff --git a/data/text/DLP2/897242 b/data/text/DLP2/897242 new file mode 100644 index 0000000000000000000000000000000000000000..ee6b447c59050a424635ea0864b06b3094cfbd79 --- /dev/null +++ b/data/text/DLP2/897242 @@ -0,0 +1,14 @@ +TPS254900-Q1: IMON pin float if not used + +Part Number: TPS254900-Q1 Hi Team, It is acceptable for the IMON pin to be left floating if not used? Thank you! Jared + +Hey Becker, It suggest short this pin to ground if you don't use this pin. + +Hi Michael, Thank you for the quick reply. Should an resistor be placed between the pin and ground or is it acceptable to short the pin directly to ground with no resistance? -Jared + +Hi Jared, You can short this pin directly to GND not need to add a resistor. + +Hi Michael, Thank you for your help on this! One more question for you.. tying the IMON pin directly to ground will increase current consumption in the device slightly. Therefore, are there any negative consequences from leaving the IMON pin floating if not used? What are the side effects of leaving the pin open? Thank you, Jared + +Hi Jared, This pin is use for internal feedback voltage sensing. If you let this pin open, there will be noise sensitive. The pin current is very small less then 100uA. You should not consider the current consumption for this small current. + diff --git a/data/text/DLP2/897250 b/data/text/DLP2/897250 new file mode 100644 index 0000000000000000000000000000000000000000..e63342c36d0b3198cf95d10d5b6a028773730695 --- /dev/null +++ b/data/text/DLP2/897250 @@ -0,0 +1,14 @@ +AWR1642BOOST: External Clock Implementation: Will a 10 MHz external clock frequency function properly as an external clock input to the AWR? Or is 40 MHz necessary? + +Part Number: AWR1642BOOST Hi, I am currently working with three AWR1642's in a network (multistatic mode). Right now, they are hardware synchronized together in the network. I have worked hard to software synchronize them, but with clock drift among the radars (inaccuracy in clocks during test), I have not been able to solve this (recommendations?). Recently, I found a possible solution through a fellow lab at MIT (called AirShare, documentation attached). In short, AirShare has two components: a clock emitter and a clock recipient. The emitter transmits two tones, f1 and f2, that are separated by the desired clock frequency. The AirShre implementation has a bandpass filter that creates a desired input clock frequency of 10 MHz. Will a 10 MHz external clock frequency function properly as an external clock input to the AWR? On the AWR1642 device documentation, it denotes the external clock should be connected to CLKP pin at 40 MHz. Documentation below. Any help would be greatly appreciated... thank you! George -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- AirShare Documentation: AirShare.pdfcompany AWR1642 Documentation on External Clock:company External Clock Documentation.pdf + +Hello George, AWR device cannot work with 10Mhz clock, it needs a 40Mhz clock. You could use a TCXO clock source instead of the xtal , this would allow for very low ppm frequency error (< 5ppm) across temperature. This should solve the frequency error problem If you are looking at timing synchronization for the frames , there is a digital synchronization signal called Dig SYNCIN. If you configure the device in hardware triggered mode the frame will be aligned to the pulse edge on the SYNC IN signal. So if you use the same signal (delay matched) to trigger all the devices they would be timing synchronized. Regards, Vivek + +Hi Vivek, Thank you so much for your response. It helped me with understanding that I need to have an input of 40MHz clock rather than 10 MHz. Can you confirm that the external clock, like the one described by AirShare, would be inputted at CLKP pin? Or somewhere else? I was slightly confused by your Dig SYNCIN comment. Thank you! George + +Hello George, From the document I am not clear on the amplitude of the clock signal finally received at the wireless node and what is the "quality" of the clock in terms of jitter/phase noise. We need minimum 700 mVpp swing of the clock at the CLK P pin of our device. The phase noise requirements are also mentioned. Regarding the Dig SYNCIN, this is a digital signal to which the radar frame of the AWR device can be synchronized to. That will ensure the two AWr devices trigger the frame on the same signal and hence the same time. Regards, Vivek + +Hi Vivek, Thank you for your response. I am talking to one of the authors next week about the paper and I will ask the questions you prompted in your first paragraph. When you talk about the Dig SYNCIN, is this digital signal hardware based (like tethering the two AWR's together with wire to provide this signal or can it be provided through software/digitally)? I want to start moving the nodes around the environment so having them not tethered together with wire (which provides the Dig SYNCIN signal) will be really beneficial. Any clarification would be greatly appreciated! George + +Hello George, The dig SYNC IN signal is a physical hardware signal to be fed to a partical pin. So yes, its a wire connection provided to both the AWRs. If you do not want a hardware connection I am not sure if there would be any other way to synchronize them. If you can have a smaller MCU that could receive a wireless signal and provide this HW signal to the AWR device at a predictable time after it receives a command over wireless communication? Regards, Vivek + diff --git a/data/text/DLP2/897260 b/data/text/DLP2/897260 new file mode 100644 index 0000000000000000000000000000000000000000..927e59a4aba157d3d9b328c5ca4cd8a7f938baa4 --- /dev/null +++ b/data/text/DLP2/897260 @@ -0,0 +1,10 @@ +LM340: NDE .vs. NDG PACKAGE STYLES + +Part Number: LM340 Sir, I need to understand what is the difference between the package styles called NDE (LM340AT-5.0/NOPB) and NDG (LM340T-5.0/LF01). both appear to be thru hole? Does one stands vertical (NDE) and the other comes with pre-bent legs for thru-hole or SMT pads (NDG)? can I get a footprint for each? I am using the OrCAD PCB Editor ver 17.2 can I get a 3D model for each. thank you, Steve Dunn Nuvo-Group HW Engineer Yigal Alon 94. St, Alon Tower 1, Tel Aviv 6789155 T: +972.765321622 M: +972.53.779.1610 www.nuvocares.com steve.dunn@nuvocares.com + +Hi Steven, In the datasheet, please see NDE drawing on Page 31 and NDG drawing on Page 33. As the drawing shows, the NDG is not through holes and with pre-bent legs while the NDE is through-hole. We use Altium to manage package drawings, please allow 1-2 business days for me to investigate if I could export the drawings and the 3d models to Orcad as you requested. Regards, Jason Song + +Hi Steven, Sorry for the late reply. Here is the link with all the available output options that the Altium allows to export. Will you help to review the list and let me know which one would you like? I am not sure if I could concert the 3D but I am willing to try. https://techdocs.altium.com/display/ADOH/Importing%2Band%2BExporting%2BDesign%2BFiles Regards, Jason Song + +Ok ok + diff --git a/data/text/DLP2/897290 b/data/text/DLP2/897290 new file mode 100644 index 0000000000000000000000000000000000000000..23e8fdc1b1fada35bd0958a64b5dfdc06bf5ee71 --- /dev/null +++ b/data/text/DLP2/897290 @@ -0,0 +1,10 @@ +BQ25505: BQ25505 with 1V 100 nA input + +Part Number: BQ25505 With regard to my previous question about the BQ25505, will it still work if I have a 100nA input current at 1V? + +Hi Adwaya, With a charged storage element >1.8V at BAT, yes. If VSTOR < 1.8V, in cold start mode, it is unlikely that the inefficient cold start boost converter will be able to raise VSTOR to 1.8V due to the IC's Iq being in the 100nA range. If it works, it would only work in bursts as the input capacitor charges up, converter operate, stops, repeat. Regards, Jeff + +So if I have a power supply of 2.0V, 100nA, will it be able to charge a supercap (that is initially not charged), from empty to full? + +Adwaya, If VSTOR < VSTOR=CHGEN~=1.8V, the charger is in cold start. Cold start boost circuit is very inefficient boost converter. It is intended as a last resort. We do not have efficiency data for cold start operation. Based on your input power = 200nW, the cold start circuit will have difficultly functioning. The cold start circuit will likely operate in infrequent bursts as the input capacitor charges above 600mV. However, the super capacitor and chip dc leakage current, plus any resistive load at VSTOR will prevent the supercapacitor from charging above 1.8V. Your 2.0V could be applied directly to VSTOR via a PFET but the chip's Iq is >> 100nA. Regards, Jeff + diff --git a/data/text/DLP2/897291 b/data/text/DLP2/897291 new file mode 100644 index 0000000000000000000000000000000000000000..8f885ebec31319ab9916709547726c320da3b582 --- /dev/null +++ b/data/text/DLP2/897291 @@ -0,0 +1,24 @@ +LMG5200: LMG5200 Reliability at Very Low Switching Frequencies: + +Part Number: LMG5200 Hello, I am seeing occasional failures of the LMG5200 in my application: I am using the LMG5200 in a low-frequency PWM application with pure resistive loads. My pulse widths can vary from 200uS to 100mS, with the pulse-widths changing at most a percent or two from cycle to cycle. The resistive load can vary from 10 to 30 Ohms, but are constant in a given application configuration. Delivered power is well within spec limits, maximum 6 Amps through either the low side or high side switch, Vin < 40 Volts. I originally sized the bootstrap cap to 100uF for the maximum 100mS pulse width, but found experimentally that 10uF works adequately. My real application is functional, but occasionally, one of the LMG5200 driver fails (permanent short of Vin & SW & PGND and either HI or LI pins): I setup a test to isolate the failures: 1 KHz input on HI pin, the LI pin grounded, 20 Ohm load from SW to PGND. Vin=30V: I was able to catch one of the failures on the o-scope, showing the failure happens on the rising edge of SW as the high-side switch is turning on: The failure happened about 30 minutes after starting the test. The failing part shows VIN & PGND & SW all shorted together. Here are my questions: 1) Is there a maximum value of the bootstrap cap that the internal circuitry can safely charge? Or is it just a simple voltage charge through a current limiting resistor, no maximum limits on the bootstrap cap? 2) Is there a maximum value of the bootstrap cap that the high-side OV clamp can safely and quickly discharge? Is it possible that if the bootstrap cap gets excessive charge on it, the high-side clamp can't discharge it fast enough and damages the high-side switch? 3) Is there any possible issue with driving pure resistive loads? Is it possible that the faster rise time of SW (as compared to that using inductive loads) could pull the low-side gate high through the miller capacitor, causing momentary shoot-through and failure? 4) What are the most common failure modes of the LMG2500? Is there an application note describing all failure modes and how to prevent them? 5) Does customer organization know of any customer successfully using the LMG5200 at very low frequencies and/or with purely resistive loads? Thanks for your help! -James + +Hello James, Thanks for contacting us. Here are some comments: 1. The clamp will be un-affected by the large bootstrap capacitor because it works by stopping the charging of the cap, not by clamping the voltage. 2. I don't see problem with this circuit. Since you are not switching the low-side in this test, the circuit effectively has the load resistance in series with the bootstrap charging path. I don’t suspect damage to the bootstrap diode. 3. Because of the in-package bootstrap cap, it is very difficult to screw up the bootstrap inductance loop. The damage could be caused by the power loop. 4. Could you please zoom in to the switching node waveform to observe the overshoot? 5. While you are capturing the switching node waveform, can you capture the HB pin waveform as well? Thanks! Regards, + +Thank you Yichi, I increased the power loop capacitance from VIN to PGND, and the ringing/overshoot displayed in my previous post cleaned up nicely and went away. :-) I thought the problem was solved, but unfortunately this morning, another LMG5200 driver popped. I was running at low power levels (30V Input, 40 Ohm Load, 10 KHz @ 50% duty cycle). I am starting to suspect another possibility: The LMG5200 spec indicates that PGND and AGND are totally isolated inside the part and recommends keeping them isolated on the PCB, which I did. Yet when I measure the resistance between PGND and AGND on a new LMG5200 part fresh out of the vacuum packed bag, unconnected to anything other than the Ohmmeter, I measure 0 Ohms, a 100% short INSIDE THE PART. Question for you: How are PGND and AGND isolated inside the LMG5200? Does the isolation depend on power being applied? Thanks so much for your help. + +Hello James, Where did you see from the datasheet that AGND and PGND is isolated? AGND and PGND should be electrically shorted together. AGND and PGND are there for separations so that the signals not be interfered by the power switching currents. Regards, + +Hi Yichi, Thanks for your help! The LMG5200 datasheet, on page 16, specifically says to NOT short AGND and PGND together on the PCB, implying that they are electrically isolated inside the LMG5200, and one must not short them on the PCB: But my measurements with an Ohm meter across AGND and PGND on a brand new LMG5200 shows that these two pins are shorted together INSIDE THE PART. If the are shorted together inside the part, what is preventing some of the power current from being shunted out through the AGND pin? Could you please confirm if AGND and PGND are electrically shorted inside the LMG5200 or not? Thanks so much for your help! -James + +Hello James, On the datasheet PGND pin description, the PGND and AGND are electrically shorted. The layout guide is saying that for the signals, the grounds for them should be connected to AGND instead of PGND because there will be a lot of noise from the high frequency switching. AGND and PGND should be separated for power/signals. Please let me know if this makes sense. Regards, + +Thanks Yichi, With AGND and PGND shorted, what is preventing some of the high amperage power current from shunting out through AGND? To illustrate my point, here is a test setup with the low-side switch ON and the high-side switch OFF. I connect a 20 Ohm load across the SW pin and a 40V supply to produce 2 Amps of current. With 4 ammeters connected to VCC, VIN, AGND and PGND, what determines the value of the current through AGND and PGND? If they are truly "electrically shorted", should we get 1/2 through one and 1/2 through the other? 1 Amp through AGND and 1 Amp through PGND? Would this damage the part? There is no specification for AGND max current that I know of. + +Hi James, We DO NOT want AGND to take half of the current. Although the PGND and AGND are connected together internally, if the PGND and AGND are separated on the PCB and not connected together, the power loop will not go through AGND since there is no closed path for it. Ideally, the current should all go through PGND, and only control signals should go through AGND. Please let me know if this makes sense. Regards, + +Hi Yichi, Yes, that makes perfect sense, and I agree with you that all the power-loop current should exit PGND. But that is not what I am measuring in the lab: I have discovered a failure mode of the LMG5200 that is reproducible, and I now know an apparent solution (both presented below) What I am asking from you Yichi, is to provide me more detail about this "electrical connection" between AGND and PGND so I can make sure this failure mode is not possible in the final system design and setup. Below is the reproducible failure mode. I am measuring significant power-loop current shunting out through the AGND pin. The LMG5200 will last in this state for 30-60 minutes before failing. When the failure occurs, you can actually here a *POP*, the power supply voltage drops low and goes into a current-limit state. After removal of the LMG5200 from the PCB, VIN, SW and PGND pins are all shorted together internally. Notice above that both of my supplies have the floating negative terminals shorted to the common earth ground. Thus the supplies are no longer floating. The solution is to simply float both of the supplies, disconnecting each negative terminal from the common earth ground: With that simple setup change, 100% of the power-loop current exits correctly out through the PGND pin, as it should: Thus it seems that whatever this "electrical connection" is between AGND and PGND it requires a slight voltage bias of a few milliVolts to properly close off the path from the power loop to AGND. Without this slight voltage bias, the path opens up and power-loop current is shunted out through AGND, and eventually destroys the part. Any further information you can provide on the inner details of whatever it is between AGND and PGND that can cause the power loop path to open up to AGND is what I am looking for to close this ticket out and go into production with the LMG5200, confident that this failure mode will never happen on a customer site. Thank you so much Yichi! :-) -James + +Hi James, Let me check back with the team to see what information is available to provide. Thanks, + +Thanks so much for your help Yichi! I did find this post by one of your co-workers, Lixing Fu: /support/tools/sim-hw-system-design/f/234/t/760440?TIDA-00913-Questions-about-Connecting-AGND-to-PGND-of-LMG5200 He mentions a "Kelvin" connection between AGND and PGND. Is this a small current sense resistor? What is the nominal value? The details of this internal connection is critical to my application because I am measuring current through the PGND connection using a 15 mOhm sense resistor, and I have a total of 6 LMG5200's on my PCB all sharing the same PGND and AGND ground planes. I will make a schematic picture of my concerns today so you can visualize what I am talking about. Thanks again, -James + diff --git a/data/text/DLP2/897319 b/data/text/DLP2/897319 new file mode 100644 index 0000000000000000000000000000000000000000..e68e49e406d58a0bfd68d2cc3f1cfc365dc00bd5 --- /dev/null +++ b/data/text/DLP2/897319 @@ -0,0 +1,6 @@ +UCC29910A: Design Tool Questions + +Part Number: UCC29910A Greetings, Short background on the application: I am creating a 90-528 VAC input, 24V 150W output PFC power supply. I'm looking at a buck-boost topology for this to regulate Vbulk at around 400V regardless of input. Because I cannot find a buck-boost PFC controller (please let me know if you have one available or know of one), I am utilizing the UCC29910 and an additional unchosen PFC boost controller with additional circuitry to control which one is active, etc. I'm looking at the UCC29910A Design Calculator (rev A) (SLUC265) and have a couple of questions. 1. For the 'minimum AC input' field, should this number be the minimum AC input voltage that could ever be present or the minimum AC input voltage where the controller should be running? There is a distinct difference in my design because from 90-282 VAC input I will want to boost to 400V and from 283-528 VAC input I want the UCC29910 active. The 282/283 crossover range is flexible if you have a better suggestion, it's just right at the 400V mark. 2. What does the 'boundary AC input voltage' field refer to? Thank you for your time, Carter + +1. For the 'minimum AC input' field, should this number be the minimum AC input voltage that could ever be present or the minimum AC input voltage where the controller should be running? There is a distinct difference in my design because from 90-282 VAC input I will want to boost to 400V and from 283-528 VAC input I want the UCC29910 active. The 282/283 crossover range is flexible if you have a better suggestion, it's just right at the 400V mark. Minimum AC input is the minimum input when you want to UCC29910A to operate. If you want UCC29910A to start operate from 282Vac, that is min. 2. What does the 'boundary AC input voltage' field refer to? Your UCC29910A operation is between 282Vac and 528Vac, you can pick up some voltage in between to make design. In the design sheet, 160Vac is about in the middle of 90Vac to 264Vac. + diff --git a/data/text/DLP2/897340 b/data/text/DLP2/897340 new file mode 100644 index 0000000000000000000000000000000000000000..625361cfe977a8c01ac7bda372811a010b96bd64 --- /dev/null +++ b/data/text/DLP2/897340 @@ -0,0 +1,18 @@ +BQ34Z100-G1: Learning Cycle not converging + +Part Number: BQ34Z100-G1 I've been trying to run the learning cycle on a Samsung li-ion cell and have not had any luck getting it to converge. I've included my log here for review. Please advise on what I should try next. I've gone through 4 charge discharge cycles and the learning mode is still stuck on 4 instead of changing to 2 and then 6. learning_cycle.log + +Hi Nikhil, Please share your srec file before you did the learning cycle. Andy + +Here is the .srec file. Is there anyway to skip the learning cycle? The Ra table should mostly be sufficient since I'm using an off-the-shelf cell with an existing chem ID. I'd like to just manually set the Qmax based on some separate cycling I've done on these cells. Also, won't the Qmax already update continuously while cycling during normal use? 5228.0100_0_16-bq34z100G1.srec.txt + +I just look at the log file. All the voltage readings don't seem right to me. I would suggest you double check. Andy + +Can you please be more specific? Which voltages should I be checking? This is for a 4s lithium ion pack + +Check the Voltage column in the log you uploaded. All the voltage readings are below 2V. They don't seem right for a 4s pack. The chemistry id you are using is for a battery that operates from 4.2V to 2.5V. The voltage reading should be over 10V. Andy + +Which values in the log file should I be looking at? I'm seeing values that are in line with the pack voltage. It starts at a 1568 mV and ends at 1180 mV. I don't see anything that shows lower than 2V on the log. I've also tried again, this time doing an IT_ENABLE command once discharge has occurred and the OCVTAKEN bit has turned high in order to set a DOD0 reference point. I got this from the steps listed here: /support/power-management/f/196/t/300700. My taper current is set at 100 mA, but I still do not see the FC bit turn high during charge. The latest log is attached here. 50elearningcycle33333.log I'm not sure what else I can try here. I've tried with multiple packs and various ICs and nothing seems to work. + +See my comments below. It starts at a 1568 mV and ends at 1180 mV. I don't see anything that shows lower than 2V on the log. [Andy] 1568mV = 1.568V and 1180mV = 1.18V. See both are below 2V. + diff --git a/data/text/DLP2/897377 b/data/text/DLP2/897377 new file mode 100644 index 0000000000000000000000000000000000000000..ed2b55810d68c0e03c16c2ec27dac4c1b8d09a29 --- /dev/null +++ b/data/text/DLP2/897377 @@ -0,0 +1,10 @@ +TLV62095: schematic check + +Part Number: TLV62095 Hi team, Could you please help review the schematic as attached? Thank you! + +Hello Zoe, Schematic is looking good to me. Nothing to add from my side. Let me know if you have any other questions. Thanks a lot! Regards, Dorian + +Hello Zoe, I haven't heard back from you, I will close this thread due to inactivity. If you have any other questions on this topic or device, please reply below. Thanks a lot! Regards, Dorian + +Hi Dorian, Many thanks!!! + diff --git a/data/text/DLP2/897383 b/data/text/DLP2/897383 new file mode 100644 index 0000000000000000000000000000000000000000..701dce32ea94168b9d732721c3531940b0cf8716 --- /dev/null +++ b/data/text/DLP2/897383 @@ -0,0 +1,12 @@ +BQ4050: Fuel gauge that can work with BQ25700A/ BQ25710 w/o host controller. + +Part Number: BQ4050 Hi Team, I'm looking for a Fuel Gauge that can work (independently w/o host controller) over SMBus with battery charger BQ25700A/ BQ25710. My intention is to design a smart charger without Host controller. Thanks Prajith + +Hi Prajith, I assume you are working on a multi-cell application. BQ40z50 is a flash gauge and supports SMBus and it can work alone without a host controller. Andy + +Hi Andy, Thanks for your reply. I noticed that the part mentioned in your reply is BQ40z50, but my query was on BQ4050. Any specific reason? as per my understanding both of them are capable for SMBus master operation. Yes, battery configuration is 3s. May i know whether we have tested BQ40z50 with BQ25700A/ BQ25710? One more question, Is BQ4050 capable of multi-master operation? Thanks Prajith + +Hi Prajith, Ses my comments below. a) BQ40z50 and BQ4050 are using different algorithms. If you are looking for accurate SoC readings, BQ40z50 is better. b) I have seen other customers use bq40z50 with bq25710 before. c) It should be. I would suggest you get an EVM and double check. Andy + +Hi Andy, Thanks for your reply. Regards Prajith + diff --git a/data/text/DLP2/897434 b/data/text/DLP2/897434 new file mode 100644 index 0000000000000000000000000000000000000000..3f6bee46422c6851e7976931cb09d201315b61f7 --- /dev/null +++ b/data/text/DLP2/897434 @@ -0,0 +1,24 @@ +IWR6843: Pinmux settings & device coding for I2C/SPI usage + +Part Number: IWR6843 I'm using mmWave IWR6843. I saw incompany website has PixMux software but Windows OS does not allow me to install it, so I may need to use Cloud PinMux Tool. But I see no tutorial of Cloud PixMux Tool and the correlation between PinMux tool setting and device code. 1. Is it necessary to write some register codes or hardware modification related to pinMux in order to use SPI, I2C? I checked the document swru546b, but there's no information about it. As I know, if we do wrong on pinMux, the board will be broken. Please provide me with documents and share real application experience on it, I read IWR6843 datasheet and see some infor such as PINCNTL ADDRESS I2C_SCL is 0xFFFFEA74 I2C_SDA is 0xFFFFEA78 SPIA_CLK is 0xFFFFEA14, SPIA_CS_N, SPIB_CLK... Are SPIA & SPIB 2 SPI ports? Are these 2 SPI ports initially enabled ready for use or we have to do something to enable it? I checked SPI & I2C reference code in SDK, but I don't see any correlation between pinmux and SPI, I2C. Please explain in more details. Based on PINCNTL ADDRESS, please show me how to write code for SPI/I2C corresponding to PinMux settings. 2. By the way, can u introduce me any adapter device (SPI/I2C to USB converter) to connect IWR6843 to PC via SPI/I2C pins? I found some FTDI ICs FT2232C (for SPI), FT232H (for I2C). Is it better to connect IWR6843 to Rapsberry Pi 3 via SPI/I2C directly rather than using SPI/I2C-to-USB converter to general-purpose PC? If I connect IWR6843 to Rapsberry Pi 3 model B+ via SPI/I2C, the voltages are the same to connect without having to use any adapter, right? 3. If I use FTDI IC for SPI/I2C to USB converter, how can I send data from IWR6843 to PC through FTDI IC? Do I need to write my own code for FTDI IC or there's an API? If I don't care the IC brand, can you suggest me some SPI/I2C to USB converter which provides me with full source code to send data? 4. If I use Rapsberry Pi 3 to get data from IWR6843 via SPI/I2C, is there any difference betweencompany SDK in Windows OS and Linux? Can I use the samecompany source code on different OS? If not, please give me link to download SDK, and allcompany required tools on Linux in order to test with Rapsberry Pi 3. + +Hi, Please download and install MMWAVE SDK. In the path below in the SDK directory, there are examples you can review to understand how to setup the peripherals. mmwave_sdk_03_xx_xx_xx\packages\ti\drivers the appnote linked below also has SPI implemented in the SW package /lit/ug/tidud26b/tidud26b.pdf. Charles O + +Hi Charles, 1. Because UART data transfer rate is low, so I want to connect radar board to PC via SPI/I2C for higher speed. But if we still use MSP432 to connect to PC via UART port, PC still receive data as slow as UART rate, right? So it's not different from connecting IWR6843 directly to PC via UART. Since IWR6843 also has UART port, what's the point of using MSP432 as a bridge between IWR6843 & PC if it does not help increase data transfer rate than UART? 2. I see incompany SDK has spiTest.cpp, it mentions FTDI Spi interface. Do I need to write code separately for FTDI IC? Please tell me how to connect IWR6843 to PC by using FTDI SPI/I2C. 3. Besides, you haven't replied my question about the correlation between pinmux setting and SPI/I2C device code and the way of assigning register address for SPI/I2C pins in device code. + +Hector Ta 1. Because UART data transfer rate is low, so I want to connect radar board to PC via SPI/I2C for higher speed. But if we still use MSP432 to connect to PC via UART port, PC still receive data as slow as UART rate, right? So it's not different from connecting IWR6843 directly to PC via UART. Since IWR6843 also has UART port, what's the point of using MSP432 as a bridge between IWR6843 & PC if it does not help increase data transfer rate than UART? if the intention is to connect to the PC directly via SPI, you can use the other USB port on the MMWAVEICBOOST. Please see section 2.4.1 of the users guide. /lit/ug/swru546b/swru546b.pdf Please not that the OOB demo, mmWave visualizer and other applications we provide currently only support UART, Hector Ta 2. I see incompany SDK has spiTest.cpp, it mentions FTDI Spi interface. Do I need to write code separately for FTDI IC? Please tell me how to connect IWR6843 to PC by using FTDI SPI/I2C. When the FTDI is connected using the USB shown above, it appears on the device manager as a COM port. The FTDI on the MMWAVEICBOOST is programmed, you only need to install the driver in other to see the COM port Hector Ta 3. Besides, you haven't replied my question about the correlation between pinmux setting and SPI/I2C device code and the way of assigning register address for SPI/I2C pins in device code. Please reviews the examples in the SDK, it shows how to setup the pinmux and various peripherals. + +Hi Charles, I modified mss_main.c code, then added SPI lib to mss project path but the compile still got error. Please tell me a way to solve it. + +Hi Charles, I got less compiling error by adding xwr68xx_spi_mss.xer4f in the path C:\ti\mmwave_sdk_03_03_00_03\packages\ti\drivers\spi\test\xwr68xx to the project. Previously, I got 13 compile errors. After added xwr68xx_spi_mss.xer4f, now I only see 4 errors. Not sure whether this is better or not. But even if I don't use SPI function and remove all SPI commands, I still have these 4 errors after adding xwr68xx_spi_mss.xer4f to my project. If I don't add it, I only got compile error when I use SPI commands. How to solve it? I expect I can use SPI/I2C within this week, but I got stuck at library linking even though it seems to be easy. 1. Here's the error after I added xwr68xx_spi_mss.xer4f error: "could not be statically or dynamically linked null: file "C:/ti/mmwave_sdk_03_03_00_03/packages/ti/drivers/spi/test/xwr68xx/xwr68xx_spi_mss.xer4f" could not be statically or dynamically linked 3D_people_count_68xx_mss C/C++ Problem 2. Here's the error without xwr68xx_spi_mss.xer4f, I only added libspi_xwr68xx.aer4f in the path C:\ti\mmwave_sdk_03_03_00_03\packages\ti\drivers\spi\lib + +Are you trying to build the SPI test code, or are you trying to link the SPI driver into an existing CCS project? Nothing within the SDK builds within CCS by default - only gmake makefiles are used. The SDK user guide gives full instructions on how to build via gmake. So if you want to rebuild the SPI test code, use gmake. If you are trying to include the SPI driver into your CCS project, then I question why are you trying to include SPI test code? -dave + +Hi woodall, My Manager wants me to prove that I can make SPI function works well on IWR6843 EVM. So I need to demo it on a PC, maybe via GUI or data stored in csv/excel. But GUI provided bycompany can only demo via UART, so I guess it's not suitable for my purpose. So I have these questions: 1. Is there any way to test SPI function of IWR6843 EVM and still connect its XDS110 port to PC USB port to show a demo of SPI read/write? 2. If it's mandatory to use a bridge circuit board? I read TIDEP-0091 that described connection between IWR1443 & MSP430 launchpad, but I don't have MSP430 now. Is there any document or sample code to communicate Raspberry Pi, Arduino with IWR6843? 3. In the future, I may purchase MSP432 launchpad, please share me the SPI communication code and UART GUI for the project demo similar to TIDEP-0091.pdf file. + +>1. Is there any way to test SPI function of IWR6843 EVM and still connect its XDS110 port to PC USB port to show a demo of SPI read/write? Sure, you can simply flash the pre-built SPI example program. The program uses the USB UART to display information and to request sub-test numbers. What test(s) you can run depends on what you connect to the carrier card. Probably the easiest way to show the SPI is working is by using an SPI protocol tester. You can also edit/rebuild the example code to only perform the tests you are interested in, and in the SPI mode you are interested in. >2. If it's mandatory to use a bridge circuit board? I read TIDEP-0091 that described connection between IWR1443 & MSP430 launchpad, but I don't have MSP430 now. Is there any document or sample code to communicate Raspberry Pi, Arduino with IWR6843? No, but you do need something that understands SPI. I have used two 6843 EVMs, and connected the two carrier cards with breadboard jumper wires. TIDEP-0091 uses an MSP432. You can also use any other kind of board such as a Raspberry Pi or Beagle Bone, you just need to find out how to connect the wires and configure the device for an SPI mode that is compatible with the SPI mode used on the 6843 EVM. Here are the carrier card connections. You can refer to the board schematics to see which pins are which: >3. In the future, I may purchase MSP432 launchpad, please share me the SPI communication code and UART GUI for the project demo similar to TIDEP-0091.pdf file. This code is already available with the design guide material here: www./.../tidcde2 + +Hi woodall, 1. Can you give me the SPI code to read/write data between 2 IWR6843 EVM? I'm doing 3D people counting. It'd be great if you have SPI code for 2 IWR6843 EVMs or similar EVM for my application. If SPI data transfer is successful, we can still display tracking on GUI via UART of 1 EVM without having to design new GUI or write SPI code on MSP432/Pi. Anyways, I'm still concerned about the way to demo on GUI. e.g. We have EVM A & B. We write data from A to B via SPI. After B finished SPI reading, B send data to PC via UART. How can I know that B didn't send tracking data by itself? Because both boards are working. Maybe SPI write from A was failed but GUI still get data from B. Do I need to store SPI data read in a buffer then send it from B to GUI to know whether SPI works well? 2. The link you sent to me is not available to download. Please upload on Dropbox or Google Drive and send me another link. Of course, if you can send me code as #1 query, I don't need to use MSP432 anymore. But it's still good to have both solution. + +Attached are two zip files. xwr6843_mmw_spi_demo_src.zip provides files to drop into the 68xx mmw demo MSS folder (MSS only). xwr68xx_spi_slave_testcode_src.zip contains files to drop into C:\ti\mmwave_sdk_03_0x_0x_0x\packages\ti\drivers\spi\test\xwr68xx. I strongly suggest making copies of the original files so that you can compare them to see the differences. You will need to rebuild both the demo, which sends demo output to SPI, and the test code, which receives the SPI transfers and displays counts of received messages. Follow the SDK user guide's instructions to build. xwr6843_mmw_spi_demo_src.zip xwr68xx_spi_slave_testcode_src.zip + diff --git a/data/text/DLP2/897436 b/data/text/DLP2/897436 new file mode 100644 index 0000000000000000000000000000000000000000..42a0a5ae54c5da74d1f4ddabedfddb89e8a50006 --- /dev/null +++ b/data/text/DLP2/897436 @@ -0,0 +1,10 @@ +BQ25895: Voltage Drop Vsys, Maximum Ouput Current Vsys durring charging and standalone with battery only, Output Voltage 4.2V, 5V (DC/DC TPS61230DRCD PTN04050CAH ) + +Part Number: BQ25895 Hello, first of all thanks for the useful informations here in this forum. After reading different threads a decided to use the BQ25895 for a portable reader device with a lipo battery (should read with bat only or with vbus) and made a pcb with it. Now I have some question after testing the BQ25895 with the reader device because I have some voltage drops at the output of Vsys with fully charged lipo. Currently I design the version 2 of the pcb and here I use different dc/dc converters to handle the voltage drop and get the specified (max) voltages for the different devices: Reader: 3.2-5.25V, 8W (5V @ 1.6A) DC/DC @ Vsys: PTN04050CAH (5V, 2.4A) GSM: 3.4-4.4V, (2A in Burst Mode for a short time) DC/DC @ Vsys: TPS61230DRCD (4.2V, 2.1A) GPS: 3.3V, (100mA) LDO @ 5V 1.) The max. Isys current is 5A so with Vsys,min = 3.7V we should have enough power at Vsys? 2.) Durring charging the battery I also have the 5A @ Isys? 3.) Are there other power management chips (DC/DC, LDO, ...) which handle the different voltages better? It is the first time I used this chip and hopefully you can help me with your experience. Thanks Andi Settings: Ilim = 2900A, Vsys,min = 3,7V, Vreg = 4.208V + +Hi, Please visit /support/power-management/f/196/t/874557 for BQ2589X: Schematic Review and PCB Layout Design Tips and /support/power-management/f/196/t/875386 for BQ2589x/BQ25898x FAQs. 1) Please refer to FAQ #3. 2) BQ25895 is a 5-A charger. It can handle up to 5A total current, i.e. the sum of the charging current and the system current. If there's no battery, the maximum system current can be 5A. Please note that the max input current limit is 3.25A, the system current and/or may also be limited by the input power. 3) If a fix SYS voltage is preferred, it is better to use DC/DC. This is charger support. Please submit a separate thread about DC/DC and DC/DC expert will help. Thanks, Ning. + +Thanks for your fast answer. So if the BQ25895 could handle up to 5A total, would it be possible to connect the devices (DC/DC) directly to the VBAT because I want always supply the devices and if there is any current "left" the battery should be charged? Would this go? I don't use the OTG functionality and so the pin PMID is floating or do I need the 40uF cap also? + +Hi, 1. It is ok to lease SYS open (i.e. no SYS load) and charge the battery only. Then the max charge current will be 5A. 2. If OTG is not used, the minimum capacitance required on PMID to PGND is 8.2 μF. Thanks, Ning. + diff --git a/data/text/DLP2/897452 b/data/text/DLP2/897452 new file mode 100644 index 0000000000000000000000000000000000000000..ba4080d1783ddfb5bbc71b7173ba984181e52e41 --- /dev/null +++ b/data/text/DLP2/897452 @@ -0,0 +1,10 @@ +UCD3138: Missing Factory Trim during download + +Part Number: UCD3138 Hi Experts, - I encounter an err message (shown below) while downloading firmware. I've read the post. (Description of trim value invalid from Ian) - In the last part of the post, it says "it(if) the part gets really mishandled, it can happen. ". Is there any idea of "mishandled" may refer to..? - Any ideas would help. Thanks. + +Normally the mishandling involves lots of repeated quick resets, and a noisy power supply. If the rise time on the power supply is slower than recommended on the Practical Design Guidelines, and the Reset pin isn't being held down it can happen. /lit/an/slua779b/slua779b.pdf + +Hi Ian, - Thank you very much. I'll check the 3V3 slew rate and RESET pin with design guideline. + +Great, glad to help. + diff --git a/data/text/DLP2/897460 b/data/text/DLP2/897460 new file mode 100644 index 0000000000000000000000000000000000000000..2989ab019369d1b66de83b7ea8f84954fedee3f5 --- /dev/null +++ b/data/text/DLP2/897460 @@ -0,0 +1,12 @@ +BQ34Z100-G1: TrueRC and TrueFCC sudden jump in low temperature discharge ,then SOC drop quickly + +Part Number: BQ34Z100-G1 Please see attched gg , log and srec files. TrueRC, TrueFCC all drop in value during discharge in low temperature.lowtemp test.rar TrueRC drops from 10024 to 3062. TrueFCC drops from 11154 to 4203,then SOC drop quickly. Why this phenomenon occurs?Pls help me.Thanks. + +Hi Meijie, I would need to take a close look at the log file. Will let you know if I need other information from you. Andy + +Hi Meijie, Hid you choose the chemistry id? Did you use the GPCCHEM tool to find the best matching id? Andy + +Hi Andy, I use the best chemical ID and I have complete the RB experiment. I want to know which may the phenomenon occurs.Please give me some advices. + +Hello Miejie, It could be temperature change or dynamic loading conditions. + diff --git a/data/text/DLP2/897477 b/data/text/DLP2/897477 new file mode 100644 index 0000000000000000000000000000000000000000..f9d72ab849a7fd52b9c7fb660f04bcaf01c29bbb --- /dev/null +++ b/data/text/DLP2/897477 @@ -0,0 +1,8 @@ +UCD9090: watch dog invalid during all voltage monitor rail faults + +Part Number: UCD9090 Hi team, In the application of watchdog, ucd9090, we found that when all rails shutdown due to a fault, watchdog would be invalid also, is this normal reaction for ucd9090? To be specific, our FPGA had an output to toggle ucd9090’s WDI to reset the watchdog counter within the reset period we set, when a fault happened (one rail shorted) then all rails turned off, so FPGA would not toggle WDI in time and WDO should be active, however, what we observed is WDO was not active. Also, UCD9090's power supply is on our permanent domain, it was not turned off. Actually, I was able to monitor the status of all rails in real time via usb adapter on Fusion when all rails shutdown. I can confirm that the watchdog was configured well, and I have verified that by stopping the toggle, which can trigger watchdog normally when all rails were up. So why when all rails turned off then WDO was not active? + +Hello Could you provide their project file? Do they have the "Disable until System Reset release" feature set under system watchdog setting? Regards Yihe + +Hi This issues had been addressed in the email. The watchdog disable is due to that it watches SYSTEM RESET signal. I will close this. Regards Yihe + diff --git a/data/text/DLP2/897478 b/data/text/DLP2/897478 new file mode 100644 index 0000000000000000000000000000000000000000..b6860d6f392120dabae9123670711ea5919e8716 --- /dev/null +++ b/data/text/DLP2/897478 @@ -0,0 +1,16 @@ +BQ27542-G1: Getting Error: VOK not cleared during the Battery Learning cycle + +Part Number: BQ27542-G1 Hi, I am getting an Error: VOK not cleared during the Battery Learning cycle and the cycle was cancelled. Cycle started with Discharge-Relax-Charge-Relax- (ERROR: VOK not Cleared and cycle stopped) In the Bqstudio, Register status VOK is LOW after the relax. But still the error was VOK not cleared after relax and because of this the cycle was cancelled. I am attaching the screenshots for your reference. Kindly suggest me the answer for this. Thanks in advance. Regards, Shambavi + +Please share a bqStudio log and the srec file before you did the learning cycle. Andy + +Hi Andy, Thanks for the reply. I am sharing the bqStudio log which is generated during ChemID selection process and the srec file. (During the learning cycle, it was not possible to collect the log).1538.final_chemID-report.zipmonday chemid log (1) (1).zipmonday chemid log.zip8780.0542_2_01-bq27542G1_Hamdy_1000mah_LC1.zip Also I'm attaching the GPC report which is generated for the bqStudio log (I have programmed the best matching ChemID 452 from the GPC report). Thanks in advance. Regards, Shambavi + +Hi Shambavi, The bqStudio log you submitted to the GPCCHEM tool is NOT what I am looking for. I would suggest you not use the Leaning Cycle tab. Instead, follow the app note below to manually run the learning cycle step by step and then you will able to capture a bqStudio log file. Andy + +Hi Andy, I followed your manual for my learning cycle. Charging was completed when the battery reached 97%, the voltage was 4132mV and the FC bit was NOT set so not able to complete the learning cycle. Initially Maximum battery voltage was 4200mV, since the charging was not reaching to 100%, we changed the maximum battery voltage to 4100mV and tried again, But still battery voltage is not reaching to 100% and FC bit is not set. I have set the following parameters in the Data memory section of bqStudio. Maximum battery voltage:4100mV Design capacity:1100mA Design Voltage:3.7V Charge Term taper current:100mA Dsg current threshold:90mA Charge current threshold:40mA Quit current:10mA Term voltage:3000mV Please find the attached screenshot and autogenerated file log. Thanks in advance. Regards, Shambaviautogeneratedfile.gg.csv + +The chemistry id you are using is an obsolete one. I would suggest you use another chemistry id mentioned in the GPC report (e.g. 2603). Also, please share a continuous bqStudio log file for the learning cycle you did. I will take a look and see what might be wrong. Andy + +Thanks Andy, I will change the ChemID. Please find the attached bqStudio log file. Regards, Shambavi23rd second trial.log + diff --git a/data/text/DLP2/897480 b/data/text/DLP2/897480 new file mode 100644 index 0000000000000000000000000000000000000000..2832eac50a76900af509cc5814f41180507b94bb --- /dev/null +++ b/data/text/DLP2/897480 @@ -0,0 +1,16 @@ +UCC27517: operating ambient temperature range of UCC27517DBVT + +Part Number: UCC27517 Dear Specialists, My customer is considering UCC27517DBVT and has questions. I would be grateful if you could advise. --- Thermal information, Could you please let me know (1)detail of evaluation board of si-taJA and si-taJC(top) and si-taJC(bot) 1p or 2S2P, board dimension,board material, copper thickness etc. (2)How could I think about operating temperature range. The datasheet says only junction temperature range. --- I appreciate your great help in advance. Best regards, Shinichi + +Hello Shinichi, Thanks for reaching out. 1. The link below discusses thermal considerations ofcompany devices. /lit/an/spra953c/spra953c.pdf 2. The junction temperature range in the datasheet represent the operating conditions of the device as switching transitions cause power dissipation across the driver, which induce a temperature which must be within this specified junction. Using the link below, you can extract your max ambient temperature at a given switching frequency, VDD, load, etc... /support/power-management/f/196/p/788867/2917563#2917563 Regards, -Mamadou + +Hi Mamadou, Thank you for your reply. Could you please advise more detail. --- 1. According to the SPRA953C, two thermal resistance values of 1s and 2s2p are shown. 1S and 2S2P are understood as the measured board conditions specified by JEDEC. On the other hand, the UCC27517 data sheet does not clearly state which board, 1S or 2S2P, was used. Please let us know which board was used, 1S or 2S2P, in UCC27517, including the board size and copper thickness. The customer'd like to know the information. 2, The operating ambient temperature range is not specified. It is necessary to calculate by device power dissipation, si-taJA and junction temperature. My understandig is correct? --- I appreciate your great help and cooperation. Best regards, Shinichi + +Hello Shinichi, 1. We use a 2s2p board in the simulations to determine thermal. 2. The operating ambient temperature is not specified because our drivers specifications are based on the junctions operating conditions that we control. Calculating power dissipation will give a more accurate ambient temperature. Regards, -Mamadou + +Hi Mamadow, Thank you for your reply. We understand 2S2P board is used for determining thermal data. I could find an application note(SZZA017A) described 2S2P boards. It is described Trace thickness, Trace length, PCB thickness, PCB width, PCB length and Power/ground-plane thickness. /lit/an/szza017a/szza017a.pdf Could we introduce this document to the customer as the measurement condition of thermal resistance. I appreciate your great help and cooperation. Best regards, Shinichi + +Shinichi, THe document is available on therefore you may share with customer. Regards, -Mamadou + +Hi Madadou, Thank you for your reply. We'll share your answer and the application note with the customer. We appreciate your great help and cooperation. Best regards, Shinichi + diff --git a/data/text/DLP2/897481 b/data/text/DLP2/897481 new file mode 100644 index 0000000000000000000000000000000000000000..cd902faed13949cf90740487b3f6f570952e89ef --- /dev/null +++ b/data/text/DLP2/897481 @@ -0,0 +1,20 @@ +TPS61041: TPS61041DBVR： About Material content of this device. + +Part Number: TPS61041 Hicompany Expert, We are now using TPS61041DBVR, we want to know its material content: here is the search result on /materialcontent/en/search?partType=tiPartNumber&partNumber=TPS61041DBVR Below is the result with two different mass, we have a question: what's the difference between them? How can we distinguish from them? We can only get the informations from IC MARKING and package Label. + +Hi Cyan, Both these two devices would commit the EC table specs. The only difference is they are built in twocompany sites so there is a little difference with Mass weight. You can buy either one. + +Hi Zack which one should I download from the multi-item and mail to customer? It Cannot be identified from the same Part Number. + +Hi Zack, Thanks for your reply. which one should I download from the multi-item and mail to customer? It Cannot be identified from the same Part Number. We must ensure the exact device that which one is we bought? + +Hi Cyan, Oncompany store if you input TPS61041DBVR, there is only one showing up. That's the one you buy. + +Hello Zack, We need to know, which one is bought? 18.5mg? or 20.3mg? How to distinguish? Are these two devices shipped at random? this is, in short, customer bought TPS61041DBVR from Arrow, then they need the Material content of this device. Whick one is the exact value? Can we distinguish by the information ofcompany Sites? + +Hi Cyan, OK. Got your meaning. If you can provide the label of the box, we can search where it is manufactured. + +Hi Cyan, Is there any update? + +Hi Zack, Thanks for your support. I think we have get your meaning. you can close this case. thanks. Cyan + diff --git a/data/text/DLP2/897497 b/data/text/DLP2/897497 new file mode 100644 index 0000000000000000000000000000000000000000..3599d0e695871d6d1e7f9f9e7a72d82e409e57de --- /dev/null +++ b/data/text/DLP2/897497 @@ -0,0 +1,10 @@ +BQ25606: BQ25606 + +Part Number: BQ25606 Nice to meet you. We create BQ25606 charge IC schematic. See attachment. We would like to have battery charging mode and Boost mode in our design. We have one question. If we do not use MCU to control OTG pin, Can you suggest a design to control OTG? And then BQ25606 can automatically change between boost mode (no USB adaptor plugin) and buck mode(USB adaptor is pluging).If OTG pin pull high anytime and USB is no plugin, it is in boost mode(VBUS = 5.15v). Thanks in advance.Power_v1_3.pdf + +Hi, Please visit /support/power-management/f/196/t/890626 for BQ25606: Schematic Review and PCB Layout Design Tips. Additional Information including FAQs is available /lit/an/slva924/slva924.pdf Designing A Standalone Single Cell 3-A Charger with the bq25606. Referring to 8.3.3 Boost Mode Operation From Battery on the d/s, if the OTG pin is pulled high all the time, the boost operation can be enabled automatically if the conditions are valid: 1. BAT above VOTG_BAT 2. VBUS less than BAT+VSLEEP (in sleep mode) 3. Voltage at TS (thermistor) pin as a percentage of VREGN is within acceptable range (VBHOT < VTS < VBCOLD) 4. After 30-ms delay from boost mode enable Thanks, Ning. + +Do you have any suggestion to design a schematic to control OTG pin in ordering that BQ25606 IC can automatically switch to boost mode (no USB adpator plugin) and buck mode( USB adpator plugin)? + +Hi, If the OTG pin is pulled high, the device may automatically enter buck or boost mode when the corresponding conditions are met. Thanks, Ning. + diff --git a/data/text/DLP2/897529 b/data/text/DLP2/897529 new file mode 100644 index 0000000000000000000000000000000000000000..7f40840a556684b8aea75466315946cbd5b4f60d --- /dev/null +++ b/data/text/DLP2/897529 @@ -0,0 +1,12 @@ +BQ76930: Current calibration needed and temperature & voltage too + +Part Number: BQ76930 Dear All, I had build Bq76930 based 20s Bms , but now problem is calibration , can some one please help with logic of how to do calibration? My Load current maximum is 60A, @ 10Ampere actual measured current is some time 8A or 12A, where as @ 60A it is either 65 or 55A. I mean to say is current variation from measured to actual is non linear. Request some one to help resolve it. Similarly am facing issue with temperature calibration and cell voltage calibration, please share logic for calibration. Also wanted to share that if i my load current deviates by 5-6A after 4 hours of continous operation, and i had used mosfets as a switch in BMS. Actually it should remain stable through out operation, but it keeps on varying with time and may be temperature by 5-6A from actual, whihc am unable to understand why? Please comment or help to resolve it. I have CAN in my project fro external communication. Rohit + +Hi Rohit, The coulomb counter is typically very linear through midrange (around 0) and may roll off near full scale. Note the CCRANGE is less than the CCFSR. If you are seeing a non-linearity in the current which varies quickly with current or time, look for a temperature coefficient of the sense resistor, solder for the sense resistor, or traces on the board at the connection for the sense resistor. As the component and interconnect heats the voltage and apparent current change. The BQ76930EVM for example has a sense resistor with a large temperature coefficient. A 4 terminal sense resistor can be used to sense the voltage on the resistor avoiding the heating of the interconnect, but is more costly. Also consider the sense resistor value you are using, a small sense resistor is desired to keep the power dissipation down inside the BMS, but it gives a coarse resolution and a small change in resistance may represent a large current. BQ76930 current calibration is typically 2 stages, first to remove the offset with 0 current, second to apply a reasonably identifiable current to calibrate gain. This gives the best accuracy over most of the range. This may be good for a system which operates over a variety of currents with occasional peaks. If you calibrate at or near full scale, gain will be accurate there but may have larger error than the other method over most of the useful range. This may be good for a system which comes on and operates at full (peak) current until the pack is depleted. Select the method which best suits your system use. + +Hi , Thanks for revert. Temperature coefficient of my sense resistor is 75 ppm/degree centigrade, and Tida 01093 is having TCR of 75 ppm/degree centigrade. It means we have better TCR compared to what TIDA has used, in such case current variation should happen is less. But it is not the case. So please suggest what else could be the reason for current drift? Secondly regarding Current calibration am unable to understand what u saying, please share some methos algorithm if possible or some link to understand it better. Also i was wondering if i can remove controller from my BMS board keeping just Bq76940 chip, but than how to configure it every time i wan to change some configurations? Is their any App available fromcompany to do configuation ? Also i assume that Bqstudio is their but it is used along with Gauge chip , which i do not have in my design currently. So suggest appropriate Application. Rohit + +My Shunt resistor Part number:- WSLP3921, WSLP5931 (75 ppm/c). Tida SHunt PArt NUmber:- WSR21L000FEA (TCR-750 ppm/c). + +Hi Rohit, It sounds like your resistor should be capable, check the ratings of the specific part you are using. If you are using a 1 mOhm, you will have 3.6 W at 60A. See what temperature rise you are getting on the resistor. Measure the voltage across the resistor and measure the voltage at the SRP/SRN pins to the BQ76930 with the current, see how it changes. I can't recall a calibration document for CC. The BQStudio calibration tool for BQ78350-R1 shows a CC offset and current gain calibration. Calibrate offset first. The technical reference manual may have some description. The BQ76940 Evaluation software will use the same interface adapter as BQStudio, but it is a separate software. See the BQ76930 product folder Software development section /product/BQ76930#design-development or /lit/zip/sluc539 . The EV2400 has pull ups to 3.3V, disconnect a sensitive MCU before connecting onto the bus with the MCU. + diff --git a/data/text/DLP2/897545 b/data/text/DLP2/897545 new file mode 100644 index 0000000000000000000000000000000000000000..b4c77ae0b11465a3e72c86f12728b8585c453975 --- /dev/null +++ b/data/text/DLP2/897545 @@ -0,0 +1,14 @@ +TPS2663: Threshold for POR + +Part Number: TPS2663 Hello, what are the threshold voltages for POR (TPS2663, not in data sheet) + +Hi Dieter, 4.5V is the minimum operating voltage. Let me check on Vin POR hysteriss and thresholds? By the way, what is your application ? Do you want to use it for 5V rail ? Regards, Rakesh + +Hi Rakesh, POR hysteresis and thresholds are very important for our design, cause we have some voltage drops from the power supply to the TPS2663. Yes, we want to use it for 5V rail. Regard, Dieter + +Hi Dieter, I am checking whether we have data for that parameter. Any specific reason to use 60V rated device for 5V rail ? we have TPS2595, TPS25982 which are more suitable for 5V rail application. Regards, Rakesh + +Hi Dieter, The typical values of Vin_POR_rising threshold is 4.3 V and falling threshold is 4.2V. So, the typical POR hysteresis is 100mV Regards, Rakesh + +Hi Rakesh, thank your for this information. We start our design with TPS2595 Thanks & Regards Dieter + diff --git a/data/text/DLP2/897553 b/data/text/DLP2/897553 new file mode 100644 index 0000000000000000000000000000000000000000..0ad982a4b22a82d926db3ccf9f9dbc381fdb9c29 --- /dev/null +++ b/data/text/DLP2/897553 @@ -0,0 +1,12 @@ +TL7702B: Vit- internal circuit + +Part Number: TL7702B Hi, Could you please give me advice about TL7702B, TL7705B and TL7733B? My customer would like to adjust voltage divider rate which consists R1 and R2 by adding series resister at SENSE pin. Then, he would like to know below information . 1. Is the Vx made from Vcc? or made from Reference Voltage 1 (REF)? Vx voltage is higher than REF. I guess Vx made from Vcc. Is it correct? 2. Could you please give me R1 and R2 information for TL7702B, TL7705B and TL7733B? I found application note (http://www.tij.co.jp/jp/lit/an/slvae04/slvae04.pdf) There are TL7702 and TL7705 information. But are these data same as TL7702B and TL7705B? And could you please let me know R1 and R2 data of TL7733B? 3. Do you have reference schematic which adjust divider rate of R1 and R2 by adding resister at SENSE pin? Regards, Nagata. + +Nagata, I was able to locate old version datasheet for TL7702B and TL7705B. 1. From block diagram, Vx comes from the reference voltage and reference voltage comes from Vcc. But the Vx voltage is not directly equal to reference voltage which is why there is the adjustable resistor symbol in between the reference and Vx. This indicates the Vx changes depending on the device variant. 2. From previous revision of datasheet beforecompany switched to new format for datasheets, I found the schematic attached. 3. We typically don't recommend adding series resistor to change voltage threshold because the additional resistor provides more inaccuracy because of the tolerance of the external resistors and also the internal resistors have tolerance. A resistor divider is usually a more accurate approach but I think a series resistor can also work since the internal resistor value estimates are known. If you can tell me more about the application, I can recommend a newer and better device with the correct threshold. + +Hi, Michael Thank you very much for your support. Could you please let me check about your #1 comment? Is the resister which is for Vx connected between Vcc and GND? Regards, Nagata. + +Hi, Michael, Could you please let me know the your recommend device which user can adjust threshold voltage via SENSE? Regards, Nagata. + +Nagata, The Vx value is shown above in Note A for each device variant. For TL7702B, Vx = Vref. For TL7705B and TL7733B, Vx ~1.43V. Our top devices with separate adjustable SENSE pin, please try TPS3890 (smaller SON package, adjustable to monitor any voltage of 1.15V or higher) or TPS3808 (SOT23 package, adjustable to monitor any voltage of 0.4V or higher). + diff --git a/data/text/DLP2/897578 b/data/text/DLP2/897578 new file mode 100644 index 0000000000000000000000000000000000000000..2b2e0e9230a8bd466f3eca72408b823d137c3f57 --- /dev/null +++ b/data/text/DLP2/897578 @@ -0,0 +1,18 @@ +UCC27710: About operation. + +Part Number: UCC27710 Hi team. My customer uses only high side of UCC27710. However, it starts and stops repeatedly. Could you tell me what kind of factor causes it to stop? The waveform is follow. Vout is across the capacitor. If you need additional waveforms, please let me provide details. Sincerely. Kengo. + +Hello Kengo, Thank you for supporting the UCC27710 with your customer. It looks like there is an issue with the HB-HS high side bias maintaining voltage during the long periods. The boot capacitor is charged from VDD when the switch node switches to ground, since this is a high side only driver there is no low side FET to guarantee the switch node will switch close to ground. Depending on the power train loading, the switch node may transition to ground or may not. To minimize the HB bias drop, make sure there is not a low value gate to source resistance on the high side FET, this will discharge the HB capacitor when the HO is high. Refer to the UCC27710 datasheet section 9.2 to size the HB-HS capacitor based on the MOSFET and lowest switching frequency. It will help to see the HS waveform to see if it is switching close to ground. Regards, + +Hi Richard. Thank you very much for your kind instruction. My customer used the diode for low side. So, HSpin is at GND level. They reviewed the boot capacitor and changed it to 0.22uF. However, it will start and stop. Could you give me your advice? Sincerely. Kengo. + +Hello Kengo, Thank you for the update. The first thing to confirm, is to monitor the HB-HS bias voltage with a differential probe and confirm the HB bias is always above the UVLO threshold. We recommend an operating voltage of 10V minimum from HB-HS, the voltage should be maintained above 8.5V to avoid UVLO possible shutdown. Does the boot diode have some resistance in series? Confirm the boot diode resistance, if the resistance is too high it may prevent proper HB capacitor charging. We ususally recommend a 2.2 to 10 Ohm range as a typical value. Regards, + +Hi Richard. Thank you for your comment. I got the waveform that is the HB-HS(=V-Cboot) bias voltage with a differential probe. There is sufficient voltage, but it has turned off when the target voltage is reached. And then, the Rboot already used 2.2Ω. Are there any other comment you care about? Sincerely. Kengo. + +Hello Kengo, It looks like at a certain point the HB-HS capacitor is not being recharged and drops to 0V. Can you confirm with the HB-HS differential probe as in the last plot, and add the HS switch node to confirm the supply is switching, and the UCC27710 HI driver input to see if the controller is stopping the switching operation? It may be that the controller is stopping switching, for some reason, or maybe the switch node stops switching close to ground, which may happen in certain load conditions. Regards + +Hi Richard. I confirmed the waveform(bellow), but it also stopped switching. Is there any reason why switching stops? Sincerely. Kengo. + +If the VDD is above the UVLO threshold, HB-HS is above the UVLO threshold, and the driver input is active the driver output should respond. It does look like the switch node is going close to ground based on this plot, but can you also confirm, that the controller is providing the signal to the driver IC when the driver switching stops. That is one signal I want to confirm. Regards, + diff --git a/data/text/DLP2/897593 b/data/text/DLP2/897593 new file mode 100644 index 0000000000000000000000000000000000000000..3c9f41b13f271bdba46ac92bfb4a988b0ec43ab6 --- /dev/null +++ b/data/text/DLP2/897593 @@ -0,0 +1,6 @@ +LP5907-Q1: LP5907 IEC62380 classification + +Part Number: LP5907-Q1 Hi all, Can someone please provide me the input parameters necessary for FIT rate calculations based on IEC 62380? for example number of transistors inside the IC, technological structure( MOS? BICMOS?) , lambda3 classification(SO?), etc... device is LP5907QMFX-3.3Q1 to be specific. Thank you in advance! Best regards, Stefano + +Hi Stefano, Sorry for the slow response. This information comes from a look up table in a reliability handbook. To get the values out of this table we provide them with functional block diagrams so they can look at the basic components that make up the device (op-amp, voltage reference, pass transistor, etc.) and we also provide them with the component count of the design, that breaks down which transistors are included how many of each type etc. Let me know if there is anything else that you want to know about this process. Regards, Mark + diff --git a/data/text/DLP2/897608 b/data/text/DLP2/897608 new file mode 100644 index 0000000000000000000000000000000000000000..4b6d3413b5a21fd98a43d982f8d3c255e72db21a --- /dev/null +++ b/data/text/DLP2/897608 @@ -0,0 +1,12 @@ +BQ34210-Q1: Fuel gauge takes over 15 minutes to go into relaxation mode + +Part Number: BQ34210-Q1 Hallo, I have a BQ34210-Q1 on a custom board with a CC2652R. I'm trying to get the StateOfCharge and StateOfHealth from a battery. But i'm running into an issue when trying to get the initial RRate and RCell. It seems to take more then 15 minutes for the fuel gauge to get into the relaxation mode. I added a screenshot of bqstudio. The manual says that it look at voltage() for 100 seconds but voltage hasn't changed for 15 minutes. I also wait for the Charge Management Controller on the board a MCP73833 to charge the battery to full before sending the EOS_RCELL_RRATE_LEARN subcommand. Is there a way I can make sure the battery get into Relaxation mode? It also seems that LTI bit is set right after I set the EOS_EN bit. How would I be able to prevent this. + +Hi Frank, Could you provide your gg file? I would like to check your configurations. Andy + +This is my configuration: settings.gg.csv + +Hello Frank, It depends on the battery voltage settle time here to really be in relax mode. + +Was there anything you could find within the configuration? + diff --git a/data/text/DLP2/897623 b/data/text/DLP2/897623 new file mode 100644 index 0000000000000000000000000000000000000000..61d827b7b015ea32f15dc72d22db14571380f149 --- /dev/null +++ b/data/text/DLP2/897623 @@ -0,0 +1,16 @@ +TPS62170-Q1: TPS62170: FIT Rate input parameters + +Part Number: TPS62170-Q1 Hi all, Can someone please provide me the input parameters necessary for FIT rate calculations based on IEC 62380? for example number of transistors inside the IC, technological structure( MOS? BICMOS?) , lambda3 classification(SO?), etc... device is TPS62170QDSGRQ1 to be specific. Thank you in advance! Best regards, Stefano + +Stefano, You can get the FIT rate data here: /.../estimator.tsp + +Hi, I have seen FIT estimator that you have suggested but it doesn't consider mission profile and other parameter. We are analysing ASIL level of our board using IEC-62380 and it requires more parameters fro each components. for example number of transistors inside the IC, technological structure( MOS? BICMOS?) , lambda3 classification(SO?), etc... Could you share TPS62170 parameter for IEC-62380? Best regards Stefano + +Stefano, The information I provided is what we have. I do not personally have anything additional. I will reach out to our quality team and get their feedback. It may take some time under the circumstances. + +Stefano, Usually you would provide an excel or word file for us to complete. Also, we need your company information and end equipment details. + +Design is for a new control unit. It will have a mission profile as you can see in attached file More information are reserved. Thank you Best regards Stefano + +Stefano, The Quality team is investigating. I'll post when I hear something. + diff --git a/data/text/DLP2/897628 b/data/text/DLP2/897628 new file mode 100644 index 0000000000000000000000000000000000000000..3e084de3b89fb477f166acee950fda82bda2db00 --- /dev/null +++ b/data/text/DLP2/897628 @@ -0,0 +1,10 @@ +TPS65130: voltage accuracy inquiry + +Part Number: TPS65130 Hi Team, Would you advise my customer's Vout accuracy question. There is voltage accuracy specification below, Is the total accuracy ±3% + divider resistor tolerance correct? What factor is included in Total output accuracy of 3% because Vfbp or Vfbn tolerance is only 2%? + +Hi, I have notified our expert regarding this topic. Please expect a response by 4/21/20. Thanks, Aaron + +Hello, Correct, total accuracy is +/-3% + divider resistor tolerance. Total accuracy of 3% consists of 2% for VFBP/VFBN + 1% for Vref. Kind Regards, Liaqat + +Hi Liaqat-san Thank you so much for your answer. Best regards, Shidara + diff --git a/data/text/DLP2/897644 b/data/text/DLP2/897644 new file mode 100644 index 0000000000000000000000000000000000000000..17cee9dd7dd52764d2183d476cd865206fadce00 --- /dev/null +++ b/data/text/DLP2/897644 @@ -0,0 +1,12 @@ +TPS25982: doesn't power up with load + +Part Number: TPS25982 Hello, I have problem with TPS259827LNRGET. It doesn't power up with any load current, even small like 1A (still retries, NRETRY connected to GND), but there is no problem with powering up without load (which can be applied after). Vin is 24V and max current is 6.5A (about 1A during powering up), load capacitance 100-200 uF. More details: LDSTR connected to GND, EN pulled up to external 3V3 with 10kOhm resistor, retry_dly cap 2n2, Rilim 191R, Rimon 1k69, Cdvdt 2n2, Citimer 4n7, PG puled up to external 3V3 via 100kOhm. The question is, what is wrong? I was using your dedicated calculator, but I still don't understand why it doesn't work. + +Hi, The maximum recommended operating voltage of TPS25982 is 24V. We don't recommend using this device for 24V nominal voltage as the maximum input voltage can be > 24V. Can you please share the design calculator with your design parameters filled in and your schematic for review. + +Hi Praveen, Schematic is following: Where RmaxCurrent is ~250R (270R probably) and Rimon is 2k2. For Cdvdt = 2n2 fuse powers up with max 0.8 A current load. It's not enough. In the table on p.9 in datasheet margins are wider. In the excel file I'm setting 10R load at start-up. Anyway, I minimized dvdt time (removed C150) and here we have another problem. As you can see, I'm trying to control EN line from MCU. When I'm setting low state (connecting to GND) on this pin during efuse operation with some load, after reset try, it destabilizes and falls into infinite reset cycles. I'm getting voltage on the output only if I turn off the load. Here is efuse power up with no load (blue - EN pin, pink - output voltage): I thought the problem can be with the external 3V3 source (it's coming from DC converter which is powering from 12V, which in turn come from 24V). I've noticed that if I turn off 24V power supply and turn it on fast enough (so supply on EN pin won't fall under ~1.2V) efuse will power up with load. Below is oscillogram. Second channel div is 1 V (EN pin) and third one 10 V (output voltage). First rising edge is the first PCB start-up - fuse is resetting all the time. I'm turning the power supply off and turning it on fast - fuse works fine. The third rising edge shows the situation when I let 3V3 on EN pin fall too much - efuse is resetting again. It doesn't make any sense - how EN function suppose to work if I can't set low state on this pin (<1V2)? PG pin works correctly - high state if fuse power up and low if not (reset cycles). I was trying also to use a voltage divider instead of using external 3V3. According to your eval board schematic it looked following: I've changed R2 to 60k, so EN voltage was ~1.35V. When I was switching line to GND to reset fuse, it didn't power up correctly and was resetting infinitely, again. Still under the load of course. While fuse is resetting we can observe voltage peaks on IMON pin (current load 2.9A, Rimon 2k2): What is wrong here and how can I solve this problem? I've attached excel file. Regards, Margo + +Hi Margo, It is possible that the device TPS259827L does not start with load when you are operating at 24V. This is because of the following reasons, As the input voltage is high, the power dissipation across the FET will be high for smaller current as well. The total current in the efuse will be sum of load current + current flowing into the output capacitors. As you can see in cell D7 of the attached design calculator, the design will not have a succeful startup with 24V and 10 ohms load during startup and 2.2nF dvdt cap. 8053.TPS25982xx_Design_Calculator_RevA.xlsm The design calculator takes into consideration the 'Time to Thermal Shutdown vs Power dissipation' curve/data which is taken on the device EVM. The EVM can have different RQJA when compared to your system and most probably the RQJA on your system would be less than that of the EVM. In this case, the device will take even less time to hit thermal shutdown and hence will support less load current than what the design calculator suggests. As I mentioned earlier, this device is not suitable for operating at 24V nominal voltage. As your system specs are 24V and 6A, you can consider using TPS2663. The TPS2663x devices are easy to use, positive 60 V and 6-A eFuse with a 31-mΩ integrated FET Product Folder: /product/TPS2663 + +Hi Margo, Hope your questions are answered. In case you do not have any other questions, can we close this thread ? + diff --git a/data/text/DLP2/897648 b/data/text/DLP2/897648 new file mode 100644 index 0000000000000000000000000000000000000000..1ae204478cfb68281540f910bdca4a43b99566ac --- /dev/null +++ b/data/text/DLP2/897648 @@ -0,0 +1,10 @@ +BQ24617: How to avoid entering sleep mode when using 5V adapter? + +Part Number: BQ24617 Hi Teams, My customer applies BQ24617 in their project. The use case is Lithium battery 1S3P with charge voltage 4.35V/ charge current 3A. They have two kinds of input voltage,12VIN and 5VIN. When Vin=12V, everything goes well. But when Vin=5V, the BQ24617 stop charging until the battery is discharged. We know that BQ2461X series Vcc must be at least 500mV higher than SRN to avoid entering sleep mode. Due to the customer must have 5V and 12V input voltage in their application, do you have any suggestions to solve this problem? If BQ24617 cannot meet this requirement, could you kindly recommend a suitable device for this application? Thanks and best regards, Jamie + +Hi Jamie, As BQ24617 is a charge controller, customer has more flexibility in choosing external components as well as layout. It is critical to minimize trace length (impedance) between adapter plug in and VCC of the IC, and to account for voltage drop across the input reverse blocking FETs (minimize RDSon of these PFETs). When monitoring for SLEEP mode, measure VCC and SRN as close to IC as possible. If you are looking for standalone part you can take a look at BQ25606 as well which is more integrated. + +Hi Kedar, I'll send you the layout file and schematic privately, could you kindly help on how to improve the voltage drop and let the device not to enter sleep mode when 5VIN? Thanks and best regards, Jamie + +Thread resolved offline. + diff --git a/data/text/DLP2/897674 b/data/text/DLP2/897674 new file mode 100644 index 0000000000000000000000000000000000000000..86e84caf5381e19bb9357be7c1a4f053e85801c4 --- /dev/null +++ b/data/text/DLP2/897674 @@ -0,0 +1,14 @@ +IWR6843ISK: Mounting structure for sensor and camera + +Part Number: IWR6843ISK Hi In the lab of Sense and Direct HVAC Control with IWR68xx, you overlay the radar sensor data together with the camera data. I was wondering if you could recommend a mounting structure that is able to hold the sensor and camera at the same time. Thanks! Kai + +Hi Kai, Typically you can find a tripod mount that will hold both the camera and the EVM. Regards, Justin + +Hi Justin Thanks for your quick reply! The tripod mount I found can only hold one object, the sensor or camera. Any links on the mount that can hold both? Thanks! Kai + +Hi Kai, Something like this will work fine: https://www.amazon.com/Neewer-20-3cm-Bracket-Stereoscopic-Photography/dp/B00PAG93ES Regards, Justin + +Hi Justin Have you ever overlay the sensor output with the camera image in the same plot? If so, how did you calibrate the extrinsic parameters? Thanks! Kai + +Hi Kai, I haven't done this - I am closing the thread as this is off topic. Regards, Justin + diff --git a/data/text/DLP2/897683 b/data/text/DLP2/897683 new file mode 100644 index 0000000000000000000000000000000000000000..1879b070a5461d468002ff1451cf7d1be8e45cee --- /dev/null +++ b/data/text/DLP2/897683 @@ -0,0 +1,10 @@ +AWR1642BOOST: Code Division Multiplexing? // MIMO Network where transmitters are not colocated. + +Part Number: AWR1642BOOST Hi, I have two AWR1642 sensors located in two different places throughout the environment. I am trying to figure out a way to have them both transmit at the same time and allow each of the other radars in the network collect their transmissions as well. With the hardware provided in the AWR, how do you recommend completing this? Is a code division multiplexing strategy feasible? Here are the avenues I have tried out so far: Shift the frequency bands for each node/AWR transmitter, but an AWR can only transmit one band of frequency at once. (Therefore, it cannot transit a second band for the IF signal to be realized.) Do a Binary Phase Shift Keying, but there is not a phase changer (per the block diagram below from your website) before the signal is transmitted. Also, how would one differentiate node 1's BPM signal on node 2 if the distance (therefore, phase of the incoming received wave) is not known. Therefore, I am wondering if there is another way to do this with the hardware provided on an AWR1642. CDM? Thank you! George + +Hello George, If both of AWR1642 are at a reachable distance then frame can be trigger using hardware trigger mode. In this case, one device can drive GPIO pulse which is connected to itself on AR_SYNC_IN line and on the same line of other AWR1642. This way both devices transmit frames at the same time (considering other device get GPIO pulse at same time as first device). Regards, Jitendra + +Hi Jitendra, Thank you so much for getting back to me with all your answers. As of right now, I have implemented what you described above. My question, though, is about interference avoidance in this hardware (or even one day hopefully, software) synchronized setting. Say I have 3 radars in a network. Right now, only Radar 1 transmits, while Radar 2 and Radar 3 receive the reflected Radar 1 signal. Now I want to implement a system where two radars transmit and receive all signals. So Radar 1 and Radar 2 transmit, and all three Radars collect their transmitted signal, mix, process, etc. I am doing the processing offline so no need to consider the onboard DSP chain. Here is the issue I am running into. If two hardware triggered AWR1642's trigger at once and we want to use their spatial differences in a multistatic mode (mode described above), we need a way to do interference avoidance. As described in more detail in original post, I tried BPM (Radar 1 transmits at 0 degrees and Radar 2 transmits at 180 degrees) and shifting the frequency bands (radar 1 transmits a band of 77GHz-79 GHz and radar 2 transmits at 79-81GHz), but because there is only one synthesizer and no phase changers on the AWR, I am unsure these two avenues will work (since each radar will need to mix the differing received signals on their device to get an IF signal). Do you have any other recommendations on how to accomplish interference avoidance while also being able to receive the bistatic signal from the other radars in the network? Thank you very much Jitendra, and I look forward to hearing back from you! George + +Hi George, There is no way to acheive proper bi-static operation with AWR1642. If one AWR1642 receives reflected signals generated from another AWR1642, the 'phase noise/chirp linearity' performance of the radar is degraded drastically. The one caveat to the above statement is the method of cascading radars where one chip (called the master) provides the rest of the devices (called slaves) with the 20 Ghz synthesizer signal. In this mode, both master and slave are generating near identical chirps, and so every radar in a cascaded setup will be able to recieve and 'mix down correctly' signals transmitted by other radars. That being said, the only available solution to solving the problem of interference for your problem is BPM. BPM is simply a phase change on the RF signal (not a frequency change) so the mixers will be able to down convert the signal without issue. Then using the ADC data, you should be able to separate the signals from different devices. In fact, note that AWR1642 has itself 2 transmitters with independent BPM controls, so you should be able to do the BPM test using one device with two transmitters transmitting simultaneously. Regards Anil + diff --git a/data/text/DLP2/897711 b/data/text/DLP2/897711 new file mode 100644 index 0000000000000000000000000000000000000000..772abce1e39be65fda75cd8d979047dd824103ce --- /dev/null +++ b/data/text/DLP2/897711 @@ -0,0 +1,10 @@ +TPS61096A: netlist + +Part Number: TPS61096A Good Morning, would it be possible to have the netlist for this component to simulate it in ltspice? thank you. Matilde + +Hi Matilde: To simulate in LTspice, it need uncrypted model, which is not pubilic yet. May you share email with me? So that I can touch you and check if it's available. + +Hi Mingiu, matildemaria.pavese@studenti.polito.it is my email Hope to hear back from you soon, Matilde + +Hi Matilde: As I catched you via email, please allow me close this post. Thanks for your kind understanding. + diff --git a/data/text/DLP2/897714 b/data/text/DLP2/897714 new file mode 100644 index 0000000000000000000000000000000000000000..2a1653a8dc7324f431d8f597c451775e1f003945 --- /dev/null +++ b/data/text/DLP2/897714 @@ -0,0 +1,18 @@ +BQ34Z100-G1: Configuration with a heating mat before discharge in low temperature + +Part Number: BQ34Z100-G1 Hello, I have to set up a battery that will be more on a constant power. the battery will run from -30°C to 60°C, at -30°C, there is a heating mat that will be activated for 1 hour. For GCPB learning, should heating be used or not? Which mode load mode and load select it to use knowing that I want to read the remaining energy? I can convert the capacity into energy by multiplying it by the voltage but would I have a good result? What error of imprecision should I expect following what you will recommend to me? Tanks, Best Regards Micou + +Hi Micou, What do you mean by GCPB learning? Are you talking about this /tool/GPCRB tool? Andy + +Hi Andy, Yes this is the GPCRB. Micou + +Hi Micou, -30C is very challenging for most batteries. I would suggest you check the performance of these batteries -30C first. Usually, most batteries can have little useable capacity at that low temperature. In addition, the test procedure mentioned in the GPCRB instruction manual requires that the low temperature of your choice should be constant. You should follow the test procedure, whether you use the heating mat or not. Andy + +Hi Andy, Thanks for your response. What is the behaviour if the temperature is negative and the battery is heated by a heating cloth before having a discharge? I want to know the remaining energy, what is the best mode to use to do it? the battery has a li-ion chemistry in 7S or 27V with 20Ah. Best Regards, Micou + +Hi Micou, What is the behaviour if the temperature is negative and the battery is heated by a heating cloth before having a discharge? [Andy] The gauge device provides SOC production base on the temperature, voltage, and current measurements. It still works in this case. I would suggest you do your own experiment to check the SOC accuracy by yourself.' I want to know the remaining energy, what is the best mode to use to do it? the battery has a li-ion chemistry in 7S or 27V with 20Ah. [Andy] What do you mean by "best mode"? Andy Andy + +Hi Andy, I want to have the remaining energy, but I have a microcontroller that can calculate the proportion of voltage by remaining capacity. is it better to use current model or constant-power model for the Load mode? And what is the Load select value can I use? I have a power that is not identical to every cycle. Thanks, Best Regards. Micou + +Hi Micou, I would suggest you select a Load Mode that is closer to your application. I guess you may want to start with Load Mode = 1 (Constant Power) and Load Select (default). Andy + diff --git a/data/text/DLP2/897735 b/data/text/DLP2/897735 new file mode 100644 index 0000000000000000000000000000000000000000..49375661bf4fa87bdfb60b7bcdf8dacc0647d6ef --- /dev/null +++ b/data/text/DLP2/897735 @@ -0,0 +1,12 @@ +Gate driver for Cuk Converter + +Hi team, Good day. Our customer is looking for a gate driver with spice model available to be used for Cuk Converter. Here are the requirements: Vcc = 30 to 60V Channels = 1 Switch Type = MOSFET Driver Topology = Low side Output = 1kW, 45V I have checked our product list, however, it seems that the maximum input supply of our gate drivers is up to 40V only. Looking into our reference designs for Cuk Converter, supply is within 40V only. /tool/PMP30487 /tool/PMP8639 Do you have any recommendations for this? Thank you in advance for your help. Regards, Carlo + +Hi, Carlo, The parts used in the PMPs you referenced aren't gate drivers, they are controllers made by a different group. Let me re-assign your post to that group for comment. + +Hi Carlo. 1kW sounds excessive for a Cuk converter. Anyway, most of our boost controllers can implement a Cuk. However, this 1kW makes our controlles' internal drive insufficient. You should employ an external driver, either consisting of discrete driver like two FETs in totem pole, or a driver IC like the LM51xx type, along with our boost controllers like the LM5155 for the PWM control. Hope this clarifies. Thanks, Youhao Xi, Applications Engineering + +Hi Youhao, From my understanding, since the LM5155 has an internal PWM, does it mean that I don't need to set a PWM to drive the gate while using this IC? Regards, Carlo + +Hi Carlo, If I understand you correctly: The LM5155 will handle the PWM, and you need to use the GATE pin signal of the LM5155 as the input signal to your external driver. Thanks, Youhao + diff --git a/data/text/DLP2/897746 b/data/text/DLP2/897746 new file mode 100644 index 0000000000000000000000000000000000000000..68978c23cec831a97f10df71fabd07cac8e52b2b --- /dev/null +++ b/data/text/DLP2/897746 @@ -0,0 +1,16 @@ +BQ34110EVM-796: Current sense is inverted, discharging sets the BatteryStatus.CHG bit. + +Part Number: BQ34110EVM-796 The current sensing polarity is inverted. Charging is Negative current and Discharging is positive current. I have battery and load (resistor) connected as in Figure 1 of the bq34110EVM Quick Start Guide. I replaced the bq34111 IC. During charging the BQ34110 [DSG] flag is set and the gauge indicates a negative current in bqStudio 1.3.86. Similarly to charging, discharging incorrectly causes the [CHG] flag to set. When I apply a 350mA load for calibration, specifying -350 mA applied current results in the gauge adjusting to +350 mA. I do believe I initially set current Positive during calibration, but now when I do calibration with a negative current (and discharging), it will not return to normal. I have tried re-flashing firmware (bq34110_v0_02_build_9.srec) twice; no change. + +Hi Jeremy, Are you using a bq34110 EVM? If not, make sure the sense resistor on your board has the correct connection. Also, follow the instructions in the EVM user's guide to do the calibration. Andy + +Yes. Using the b134110 EVM. No changes made to the sense resistor. Yes. Have successfully completed the calibration and it has not resolved my issue. + +Hi Jeremy, I have checked my EVM and not seen that issue. This EVM has been used by quite a few customers and I have not heard the same issue. Please follow the instructions in the EVM user's guide and make sure all the connections are correct. Andy + +I found this to be the same as I am experiencing. /support/power-management/f/196/t/654601?tisearch=e2e-sitesearch&keymatch=BQ34110EVM-796 1. Replaced a broken bq34110 2. Used incorrect polarity for initial Calibrations. 3. Charge/Discharge indicators are incorrect. 4.company could not help resolve the problem. The post states that the EV board or bq34110 was replaced. Is thatcompany recommendation? connected according to Fig 1 of the bq34110EVM Quick Start Guide + +I would suggest trying another new bq34110 device. Don't download the firmware or do the calibration. Just check the discharge current or charge current and see if they make sense. Andy + +Same setup for battery/power supply with resistor as a load. A new bq34110 registers a negative current as a discharge. Charging is a positive current. So the conclusion is that when doing the Calibration, use a Negative current or else it won't be correctable. A ROM firmware load does not correct this either. The only option in this case was to replace the bq34110 part. + diff --git a/data/text/DLP2/897752 b/data/text/DLP2/897752 new file mode 100644 index 0000000000000000000000000000000000000000..52066ba6a4acaf21bd7b6dfd4e14028f693cd8a4 --- /dev/null +++ b/data/text/DLP2/897752 @@ -0,0 +1,16 @@ +BQ20Z655-R1: DSG FET Drive Problem + +Part Number: BQ20Z655-R1 Hi, I made a battery pack that has Li-Ion cells. When the cells are nominal voltage level, I measured 4.5VDC (reference point is BAT+) at gate of DSG FET. During discharge, this drive voltage goes through lower voltage levels. But voltage of CHG drive pin is always 10.58VDC (reference point is PACK+). First, I susptected from IC. Maybe IC's charge pump has problem, I can change and try it to measure again. But still the same problem. After that I susptected from capacitors that feeds charge pump circuit. Measured with LCR meter. Values are OK. By the way, I removed reverse protection and pre-charge circuit. Maybe they are cause of this. But anything did not change. My questions are, Does IC have independent charge pump for DSG and CHG pins? If yes, so I think I need to change again, maybe it is victim of ESD. If no, I need to change my FET. 2.Can you tell me please which capacitor is helping to voltage rise from drive pins? So maybe I can try different capacitances at there. Thank you. Best regards. + +I have assigned your question to my colleague and he will get back to you later. Andy + +Can you share your schematics? The DSG FET gate drive is approx. 12V. + +Hello, 1) yes there are separate drivers for the CHG and Dsg pins. The Firmware will disable the FETS do to safety events are you sure you have not triggered a reason for the Dsg FET to be off? Thanks, Eric Vos + +Hi, I checked from software. IC is driving CHG and DSG pins. You can see my DSG FET drive SCH. + +CHG and DSG will drive the FETs in this chip. + +I have finaly solved my problem. Problem occured from my schematic. When I edited the SCH for the BoM, I changed the value of IC's PACK pin current limiter resistor value 1k to 100k. So this mistake helps me to understand how to DSG pin work. IC has independent FET drive circuits. This means every circuit can be supply from other pins. I think, this is why I see very normal voltage between CHG and source of CHG FET. Using 100k instead of 1k for PACK pin occurs low current supply for DSG pin drive circuit. Therefore I couldn't see the normal voltage value of DSG pin. This little mistake made unimaginable problems. Thank you for your kindly interest. + diff --git a/data/text/DLP2/897766 b/data/text/DLP2/897766 new file mode 100644 index 0000000000000000000000000000000000000000..37ae8ea8a32972ee454be76a79b9d3d218544fad --- /dev/null +++ b/data/text/DLP2/897766 @@ -0,0 +1,10 @@ +TPS24710: Request a design review + +Part Number: TPS24710 Hello, Please review the attacted TPS24710 design files. Thanks a lot.tps24710.zip + +Hi Shin, Thanks for sharing the design files for review. I will come back with my review comments before coming Monday. + +Hi Praveen, Thanks for your help. Are there any updates ? I'm still waiting for your reply. Regards, JH + +Hi JH, Attached is the updated design calculator. Please see my comments below, Copy of Copy of TPS24710_Design_Calculator_REV_E.xlsx The schematic seems to have 4 mOhms of sense resistor but the design calculator has 3 mohms entered. I have taken 3 mohms into consideration. The Power limit resistance values are different from the design calculator and Schematic. Make sure the timer value is > Target Timer (1.5x typical) I don't see Schottky diode at the output of Hotswap Controller. You may be required to use one to suppress negative voltage transients during events like Fast-trip. Please go through the videos in below link to get more understanding on how to use the Design Calculator. /node/1133677 /node/1133673 /node/1133664 /node/1133681 Apologies for the delay in response. + diff --git a/data/text/DLP2/897780 b/data/text/DLP2/897780 new file mode 100644 index 0000000000000000000000000000000000000000..31a4d6fed36ad5381d1e107b2afa40c59b0d8fe1 --- /dev/null +++ b/data/text/DLP2/897780 @@ -0,0 +1,10 @@ +TPS25921A: TPS25921A monitor the current？ + +Part Number: TPS25921A My customer now uses ac-dc12v to supply power to the system. The current of DC12V can be brought to 2.5A. The 12V of the system will supply power to external sensors through several sockets, Now the problem is: when the external probe is short circuited, pull off the whole system. I hope there is a chip to monitor the current. When the external probe is short circuited or overloaded, cut off the 12V supplied to the external to ensure that my system will not restart or be pulled off. Does ti's tps25921adr or tps2490 meet our needs, Or you have better recommendations. + +Hi Kevin, Yes, TI's efuse devices detect a short at the output and turn off immediately. TPS25921A also has short circuit protection but I would recommend you to consider our latest and cost competitive devices TPS2596 or TPS2595 for your application. The short circuit response time of these efuses is few micro seconds. + +Hi Kevin, Hope your issue is resolved. In case, you do not have further questions, can we close this thread ? + +Praveen:thank you! + diff --git a/data/text/DLP2/897784 b/data/text/DLP2/897784 new file mode 100644 index 0000000000000000000000000000000000000000..cb45cea0bfc6a58ca97a7963e4353ef7b0b07d07 --- /dev/null +++ b/data/text/DLP2/897784 @@ -0,0 +1,10 @@ +TPS2660: About reverse polarity protection on UVLO pin + +Part Number: TPS2660 Hello, Regarding to reverse polarity protection on TPS2660, my customer is asking a question. According to datasheet page 21, reverse polarity protection is described as following. “In the applications where reverse polarity protection is required connect a minimum of 300-kΩ resistor between UVLO and IN_SYS.” (Question) Could you please tell me why 300-kΩ resistor can protect to reverse polarity( min -60V)? (The reason of why the resistor is 300kΩ minimum.) Regards, Tao_2199 + +Hi Tao, UVLO is rated to -0.3V on the negative side. So, min 300kOhm is recommended to protect UVLO pin under reverse polarity condition. Best Regards, Rakesh + +Hello Rakesh. Thank you for reply. I have additional question. ･Why 300-kΩ resistor can protect from -0.3V(UVLO minimum rate)? Does this device protect UVLO pin by internal protect diode? Or is it related with UVLO Input leakage current? Could you please tell us theoretical explanation more detail? Regards, Tao_2199 + +Hi Tao, As you know, each pin has ESD diodes. These diodes get forward biased under reverse polarity condition and excessive currents could flow leading to the damage. To avoid that, -0.3V limit is imposed in the spec. The other way is to use a resistor in the path to limit the currents (under few mA) through the ESD diode under reverse polarity condition. This is what the 300-kΩ resistor does here. Best Regards, Rakesh + diff --git a/data/text/DLP2/897797 b/data/text/DLP2/897797 new file mode 100644 index 0000000000000000000000000000000000000000..76a0113722305c3646ad10c3a9faae896ab77b38 --- /dev/null +++ b/data/text/DLP2/897797 @@ -0,0 +1,10 @@ +LM5146-Q1: LM5146 input filter + +Part Number: LM5146-Q1 Dear: When I used LM5146 for 72V turn 5V, when hot plus, the input surge will up to 100V, so the LM5146 would be damaged. I want to used a R+C parallel to the ground, i think this has some effect on the absorption of spikes, the circuit as below: no 12V, the maxim input is 72V. How to choose the resistance value and power value of the Rin? Or there are other recommendations for absorbing spikes? Thanks! + +HI Eric, My understanding is you're asking about input filter damping. The damping cap (electrolytic) is 4x the input cap value (and take the effective value if ceramic). Then the resistor is R = SQRT(L/C) where L is the input filter inductance or the parasitic line inductance and C is the input cap value. If you need further support, please send the schematic and a completed LM5146-Q1 quickstart calculator (available by download from the product folder). Regards, Tim + +Hi Tim: Thanks! Whether the resistance power is required? Such as 1/4 W, 1/2 W? + +Hi Eric, You mean the power rating of the damping resistor? If yes, then a standard 0805 resistor should be fine. If there is an AC voltage superimposed on the DC input, then the power rating requirement may be higher. Regards, Tim + diff --git a/data/text/DLP2/897827 b/data/text/DLP2/897827 new file mode 100644 index 0000000000000000000000000000000000000000..0cda904bd4c3f49c5d1d664b334c366a9105066a --- /dev/null +++ b/data/text/DLP2/897827 @@ -0,0 +1,10 @@ +BQ78350-R1: CEDV Load Profile + +Part Number: BQ78350-R1 Hi, I am using BQ76930 and BQ78350 for my battery pack. And I will use CEDV function but I have issue about the log files which I have to upload GPCPackager for CEDV fuction. I will use my battery from -20°C to 30°C. And my load is not constant. Which 3 temperature level should I apply ? I am thinking to apply -20°C, 10°C and 30°C. My repeater load profile is; 300W 100ms 150W 500ms 200W 40s 150W 10s 50W 5s This load profile repeats until SOC gets down %0. I need to apply 2 load profile for CEDV. Should I apply half and full of this profile values? + +Hi, The temperature levels you selected are good for the temperature range of your application. For the load, I suggest full load and half load. When you collect the logs, make sure you set your protection thresholds wider than normal so that protections FETs do not open before reaching your terminate voltage. This will help the GPCCEDV tool to calculate parameters with better accuracy. Best regards, Matt + +Matt Sunna When you collect the logs, make sure you set your protection thresholds wider than normal so that protections FETs do not open before reaching your terminate voltage. This will help the GPCCEDV tool to calculate parameters with better accuracy. Thank you Matt. I have set current and temperature thresholds wider than normal conditions. There is no issue about current and temperature protections. But I confused about voltage protection thresholds. I set CUV thresholds to 2500mV. I will use my cells between 4.2V to 2.5V. Is it okey for GPCCEDV tool to calculate parameters with better accuracy? + +These voltages should be okay. Regards, Matt + diff --git a/data/text/DLP2/897848 b/data/text/DLP2/897848 new file mode 100644 index 0000000000000000000000000000000000000000..c51beb1dd9397ee920f362dfa452f9e5218e3b14 --- /dev/null +++ b/data/text/DLP2/897848 @@ -0,0 +1,16 @@ +AWR1243： Some questions about the collected dataof AWR1243 + +Part Number: AWR1243 Hi, Based on the example provided by TI, we designed a cascade mmwave radar system using AWR1243 ES3.0. According to the "mmWave-Radar-Interface-Control", I completed the configuration of all the chips and was able to get the data with the correct CP header. But I found that some of the data was wrong. The figure below is the absolute value of the collected data for all channels. The X-axis is the channel number. The Y-axis is the index value of the sample point. I found that some of the channel data was wrong, such as the acquisition of a period of noise. Through analysis, it is found that all the channels in question are the data received by the master chip. I wrote the firmware into FLASH. The path of the firmware is "C:\ti\mmwave_dfp_01_02_05_01\firmware\xwr12xx_metaImage.bin". Can you help me to analyze the cause of this problem ? Thank you very much! + +Hi, A cascade system is very complex and there could be multiple root causes to this problem. Have you tried testing with one chip only? Do you see same behavior? thank you Cesar + +Hi Xane, At this time the CP and CQ data are not supported in the MMWCAS-DSP-EVM data captures with mmWave Studio. Thank you, -Randy + +Hi Randy, Thank you for your reply. I used the FPGA system designed by myself for data acquisition, instead of MMWCAS-DSP-EVM. Here are some of the parameters I set, Data Path : LVDS Packet 0 : CP_ADC Packet 1 : Suppress Packet Lane Clock : SDR Clock Data Rate : 300Mbps ADC Samples : 1024 The manual mentions a maximum sample point of 1024 for the Complex2x mode. You mean that Packet0 should be configured as ADC_ONLY? Thank you + +Hi Cesar, Thank you for your reply. I think I should follow your advice. I'll try testing with one chip only. Thank you + +Hi Zane, Thank you for clarifying that this is not using the MMWCAS-DSP-EVM. You should not have any limitations then. But for debugging a new ADC sample receiver system, as Cesar as recommend, please incrementally add features in the simplest state first. Please let us know what you find. Thank you, -Randy + +Hi Randy, According to the manual for MIMO radar calibration provided by TI, I think the problem is the hardware design differences between the chips and the lack of system correction. When I have done amplitude and phase correction according to the solution in the manual, I got a result that met my expectations. The manual I refer to is TIDEP-01012, this may help more people. Thank you + diff --git a/data/text/DLP2/897850 b/data/text/DLP2/897850 new file mode 100644 index 0000000000000000000000000000000000000000..5ef45f28d313499441574c05feabc95ef42f7873 --- /dev/null +++ b/data/text/DLP2/897850 @@ -0,0 +1,12 @@ +TPS65381-Q1: How to shutdown the Charger pump + +Part Number: TPS65381-Q1 Hi Team, TPS65381-Q1 was used in customer's project. They have several EMI problem. Customer want to shutdown Charger pump to improve the EMI performance. But the device is out of work when capacitor was remove from board. Could you help us to find a way to shut charger pump down? Thanks. BR Songzhen Guo + +Hi Songzhen, The charge pump cannot be enable/disable manually. As described in section 5.3.6 of the datasheet the charge pump is automatically turned off once the CP_OV is set. CP_OV is typically set when VCP is above (VBAT + 12 V). Removing the capacitor between CP1 and CP2 will disable the charge pump but will also cause no overdrive voltage for internal VDD6 FET which will cause VMON to detect an undervoltage condition. Could you please confirm your customer is following the TPS65381-Q1 and TPS65381A-Q1 Design Checklist (/lit/an/slva611a/slva611a.pdf)? Regards, Ivan + +Hi Ivan, Thank you so much for you feedback. I have confirmed the checklist with customer, they followed the checklist. Could you share the layout file(Project file) of TPS65381EVM with customer? Is there any other device recommendation for this kind of application that without charger pump？ If this file is NDA, please sent it to me thought E-mail. I will check the NDA with customer. Thanks. BR Songzhen Guo + +Hi Team， Could you provide the layout of TPS65381EVM (Project File) for customer? Thanks. BR Songzhen Guo + +Hi Songzhen Guo, I will close this thread since we have switch to email communication. Regards, Ivan + diff --git a/data/text/DLP2/897859 b/data/text/DLP2/897859 new file mode 100644 index 0000000000000000000000000000000000000000..90753f5ee68088b44a89b8dac42fcc38857f1820 --- /dev/null +++ b/data/text/DLP2/897859 @@ -0,0 +1,10 @@ +TPS40322: EN control of TPS40322 + +Part Number: TPS40322 Customer wants to control sequence through EN pin. For TPS40322, we can pull EN to GND to disable IC, and float to enable, but we cannot pull EN to 3.3V to enable IC, right? + +Hi Shenhua, That's right. We can not pull EN to 3.3V to enable IC. Customer can also use UVLO pin to turn on/off the part. Thanks Qian + +Hi Qian, I want to add pull down resistor at EN pin to ensure the TPS40322 stays disabled, can you suggest resistor value? or any other method to to ensure TPS40322 stays disabled? + +Hello, I suggest to use a small FET to pull EN pin low to ensure the part stay disabled. By releasing EN pin, the rail will start up. Thanks Qian + diff --git a/data/text/DLP2/897885 b/data/text/DLP2/897885 new file mode 100644 index 0000000000000000000000000000000000000000..e2180309aa3e3d7f334093747a2cc04bef7bebb4 --- /dev/null +++ b/data/text/DLP2/897885 @@ -0,0 +1,10 @@ +LMR33610: Current limit spec + +Part Number: LMR33610 Hi, Could you please let me know the LMR33610 current limit spec(Max, Typ)? I don't find the current limit spec in the datasheet.... Thanks Muk + +Hi Mukuno, Let me check with team and update you later. B R Andy + +Hi Mukuno, LMR33610 current limit is same as LMR33620 spec. we will revise data sheet later. B R Andy + +Hi Andy-san, Thank you for your answer! Muk + diff --git a/data/text/DLP2/897902 b/data/text/DLP2/897902 new file mode 100644 index 0000000000000000000000000000000000000000..1683e1a9b5aa866341269a75deb69552fb9d97c5 --- /dev/null +++ b/data/text/DLP2/897902 @@ -0,0 +1,14 @@ +TPS1H100-Q1: DIAG_EN pin connect + +Part Number: TPS1H100-Q1 Hello team, My customer want to use the TPS1H100B-Q1 for current limit protection only without using other diagnostics. Is it O.K. to connect the DIAG_EN pin to device GND in this case also as attached schematic below? Best regards, DY + +Hi, Yes, if you do not need the current sense analog output from the current sense pin, you can short the DIAG_EN pin to GND. + +Hi Anthony, Thanks for your quick response. You mean the TPS1H100B-Q1 can suport the current limit protection by setting the current limit threshold(my customer's case: 2.466A) with exteral 1 kohm resistor at CL pin even though the DIAG_EN pin is connected to GND. Am I understanding correctly? Best regards, DY + +Hi DY, With a 1kOhm resistor, the calculated current limit is 3.0825A. If you'd like to set the current limit to 2.466A, you should use the closest resistor value to 1.25-kOhms. In regards to your question, yes, the device can support current limit protection with the DIAG_EN pin connected to ground. The DIAG_PIN when pulled high enables diagnostics, which in the case of the B version, allows for measuring the current as a voltage level using an external resistor. If you do not need external current measurents, then it is fine to pull the DIAG_EN pin to ground. + +Hi Anthony, Thank you. But I don't understand why the 1.25 kohm was recommended, instead 1kohm. Because the calculated resistor value was 1 kohm for 2.466A current limit threshold based on the equation (12) as below in the datasheet. Best regards, DY + +Oh yes, my mistake it looks like I had incorrectly referenced a number. The 1-kOhm is correct. My apologies. + diff --git a/data/text/DLP2/897958 b/data/text/DLP2/897958 new file mode 100644 index 0000000000000000000000000000000000000000..9e86ed07e37a43b02968e74130aefbbec7628cf9 --- /dev/null +++ b/data/text/DLP2/897958 @@ -0,0 +1,14 @@ +BQ34Z100: Not enable CALEN register bit in FULL ACCESS SEALED state + +Part Number: BQ34Z100 Hi Teams, It is an issue from my customer. BQ34Z100 will not enable CALEN register bit in FULL ACCESS SEALED state. This issue has happen when all the register R/W is done though I2C communication with MCU. Do you ever meet some similar problems? All your comments are highly welcomed. Thank you. + +The CONTROL_STATUS[CALEN] is a status bit. Your customer should not write to it. Did your customer use bqStuidio to double check? Andy + +Hi Andy Actually, they only read the CALEN, After set CAL_ENABLE, reading the CANLEN, find can't calculate successfully. 1. Write Control(): 0x00 CAL_ENABLE 0x002D 2. Write Control(): 0x00 ENTER_CAL 0x0081 3. Read CONTROL_STATUS， if CALEN =0，repear 1,2,3 CONTROL_STATUS is always 0x4004. Besides they have use the bqStuidio to double check. Below is the situation use baStuidio, l write in Chinese. 目前遇到的情况，程序中对bq34z100 id的读取逻辑是先读取DEVICE_TYPE，然后写入Hardware Revision寄存器，在从Hardware Revision读取出来比对正常情况下，MCU可以读取34z100的DEVICE_NAME pylon_debug>ti2c @ id: 256 name: bq34z100-G1 bq34z100 id : 0x100 OK eeprom magic : 0x20200313 OK Test result:pass Command completed successfully! 用bqstudio连接后，进行电流校准，电流校准失败，bqstudio断开连接，关机重启都无法继续连接上 MCU读取设备名出现如下情况。 pylon_debug>ti2c @ id: 256 name: , bq34z100 id : 0xf0 NG eeprom magic : 0x20200313 OK Test result:fail They set the calculate current -1A . Can you help to find the reason for failing of the current calculate? Best regards, He Xing + +Hi Team, Any feedback? Best Regards, He Xing + +Does every unit fail the current calibration? I would suggest your customer program their srec file to a BQ34z100 EVM and follow the instructions in the EVM user's guide to do the current calibration. Andy + +Taken offline. + diff --git a/data/text/DLP2/897970 b/data/text/DLP2/897970 new file mode 100644 index 0000000000000000000000000000000000000000..2487615d05540ef98ebb40076b0ce5a20e6869e4 --- /dev/null +++ b/data/text/DLP2/897970 @@ -0,0 +1,22 @@ +BQ500212A: In the reference design of 500212A, the versions of Gerber files and CAD files of TIDA-00334 are different + +Part Number: BQ500212A Hi, In the reference design of 500212A, the versions of Gerber files and CAD files of TIDA-00334 are different (as shown below). The provided Gerber files are the E1 version, and the provided CAD files are the E2 version. Prepare for proofing test, could you please give the latest problem-free files with the same version (CAD files, Gerber files, and NC Drill files) to me？ Thanks. Kind regards, Hubery + +Hello Hubery Note that allcompany Wireless Power device are NRND and support is very limited. TIDA-00334 is based on an older generation of IC, BQ500212A with high external parts count. We are reviewing the status of this design. A bettercompany Design to consider is the TIDA-00623 base on BQ50002A / 511A. + +Hello Bill Johns, Thank you for your reply. So now I want to know when you could finish the reviewing of this design, and give the needed files to me? Thank you. Kind regards, Hubery. + +Hi Hubery The PCB and Gerber file did not change between E1 and E2. This was a Bill of Material change only. See page 10 of test report, Document History list changes. E1 Gerber files are were use in the build and test of unit and are the best to use. Also this IC (BQ500212A) is NRND and the we are reviewing if this reference design is needed and should remain on the web. + +Hi Bill Johns, I found that exporting NC Drill files with the E2 version of the PCB did not match the E1 version of Gerber. The E1 version is missing NC Drill files. Could you please give the E1 version NC files to me? Thank you. Best wishes, Hubery + +See attached file NC Drill.zip + +Thank you. Best regard, Hubery + +Hi, There are dislocations between the NC Drill files you sent and the Drill Guide layer of the Gerber files of the E1 version (as shown below). Could you please solve this problem? Thank you. Best regards, Hubery + +Hi Hubery, Please find the gerber and drill files attached on here. Let us know if you have any questions. Regards, Gautham Gerber_NCDRILL.zip + +Hi Gautham, Thank you for your reply. But I got new problems when opening the Gerber files and NC drill files, how are these 8 options set (as shown below)? Thank you. Best regards, Hubery + diff --git a/data/text/DLP2/897980 b/data/text/DLP2/897980 new file mode 100644 index 0000000000000000000000000000000000000000..45d1ff9145760a48d645cfd7e8002ee53b52fade --- /dev/null +++ b/data/text/DLP2/897980 @@ -0,0 +1,12 @@ +UCC28180: clarifications about the M3 gain and on the signals transfers + +Part Number: UCC28180 Hello I recall this old discussion for which no answer was given regarding the nonlinear gain parameter M3 introduced and calculated in the datasheet. Its origin is particularly mysterious: I would like to point out two critical points: The piecewise interpolant function reported in datasheet (latest review D) / application notes seems to be totally wrong. See following pictures: The plotted PW Function M3(V_COMP) I would not agree at all with the transfer function reported in datasheet. This point is the most important one. Unfortunately, to clarify my question, I'll have to go into a brief mathematical discussion of the PFC. Since is not an easy task to accomplish by writing in plain text, I've prepared a PDF document...I'd appreciate it if you could take a look at it. 2870.TI_ucc28180.pdf Thank you in advance. Simone + +I would also like to point out that the M1M2(VCOMP) curve reported in the datasheet and the one graphed in the .xls design file file downloadable in the appropriate section of the site (/lit/zip/sluc506 , are in disagreement at leaest for high values of VCOMP. I think that all these curve should be reviewed and clarified. EDIT: Sorry, please don't consider this. I've looked in detail at the excel sheet, and the curve plotted in this last one was for a different frequency with respect to the one reported in the datasheet. My first question instead is valid, I kindly await your feedback. Simone + +Hi Simone, It will take a couple of days to review the curves, I hope to be able to give you an update then. Regards Peter + +Hi Simone, I have sent you a internal contact request so we can keep working on this. The original design team have moved to new roles since the release of this part and it will take more time to work through this. I will close this post and we can stay in contact by email. Regards Peter + +Hi Peter, I've just accepted your request. Thank you. Simone + diff --git a/data/text/DLP2/897989 b/data/text/DLP2/897989 new file mode 100644 index 0000000000000000000000000000000000000000..0b291fa057728ae96d7dfdcbb96084bfff18a042 --- /dev/null +++ b/data/text/DLP2/897989 @@ -0,0 +1,22 @@ +TPS2491: Unexpected shutdown? + +Part Number: TPS2491 Team, The description in the datasheet indicates to use a gate drive resistor of 10 Ohms if CISS is above 200pF. The MOSFET we have chosen is the FDP036N10A which has a very large CISS (5485pF). For this size of MOSFET, is it necessary to have a lower gate drive resistance? The second query we have is related to an unexpected shutdown that we are seeing. After the FET is fully enhanced, our system begins to draw power and we observe the gate on the FET start to drop unexpectedly. This is not a hard turn-off as seen in other situations. The gate takes about 1.5msec to drop to a point where current is shut off. Do you have any suggestions for what may be happening here? + +Hi Julio, 10 Ohm gate drive resistor is enough. Can you please share me the schematic and filled up design sheet for review. The design sheet is available at /product/TPS2490/toolssoftware What is the type of load ? Is it pulsed in nature which momentarily exceeding the set current limit ? Can you share the test waveforms Vin, Vout, Timer, GATE Vout, GATE, Timer, input current Best Regards, Rakesh + +Rakesh, I can comment as this was the issue that I raised. I've attached the schematic and some scope captures below: The load is a ramp of current up to a steady-state value. The issue occurs during the ramp. I have a few scope captures that show the waveforms you are looking for. The first shot below shows an overview of the issue with the input and output voltage (yellow is input voltage, green is output voltage, blue is input current). The gate voltage (yellow) can be seen in this next image to drop just before the output voltage drops (green). The next scope shot includes the timer cap voltage and shows the same condition (yellow is timer capacitor voltage, green is output voltage, blue is input current). Since the timer capacitor is not pulsing when the controller first shuts off, I'm assuming it is not in a current limit or power limit scenario. I have been able to run in other scenarios with higher current than what is shown here without the controller shutting down. In this case, the controller seems to be shutting down near 5A with the current limit at 25A. Is there a state of the controller that would allow the gate to drop in such a slow manner? Thanks for the confirmation on the gate drive resistance. Matthew Swanson + +Rakesh, Adding the completed worksheet as well. 3007.TPS249x_8x_Design_Calculator_REV_B.xlsx Matt + +Hi Matt, Thanks for the details. The controller pulls down the GATE for overload event. Why there is so much noise on the input voltage ? Have you checked by shorting L13 and L39 ? What load is used for testing ? Is it e-load ? In your test waveform, to which node (pink) the channel-4 corresponds to ? Best Regards, Rakesh + +Rakesh, Thank you for the response. The red signal is a high-frequency load that I was monitoring and is the source of the current draw on the input. The final load is a resistor. I have not tried shorting L39 as it is blocking switching noise from a higher power converter downstream. The output side of the controller (P60V) net has about 66uF of bulk shown on a different page. I have also not tried shorting the input common-mode chokes. Most of the noise is due to my sensing method. I had a rather large loop on my probe when I was measuring. I apologize for the fuzzy plots. You've hit on one of the thoughts we have about this issue. It is placed in close proximity to a high-power switching converter that drives the load. From what I understand of the part, the 'timer' capacitor charges when in current limit or in power limit mode. However, at the initial drop in the gate voltage, the timer capacitor is not charging. i.e. I assume the part does not think it is in power limit or current limit mode. Have you any experience with these parts exhibiting strange behavior in the presence of noise? If so, would you recommend any changes to our design that may help? I have attempted adding extra bulk at the input near R928 (per datasheet recommendation) and a small capacitor in parallel with R984. Thanks for the help! Matthew Swanson + +Rakesh, One other plot that may be of use is the following one I took with the output ramping very slowly. In the image below, the gate (yellow) can be seen to drop very slowly in the time span of ~2 seconds. After this, the gate snaps back up to near where it should be and repeats the sequence. The output voltage is in green, the input current is in blue and the 'timer' capacitor is in red. This seems to indicate that something is either drawing down the gate or the gate is no longer being charged by the controller during this time frame. Thanks! Matthew Swanson + +Hi Matt, In case of pulsed load at the output, the Vout ripple can couple to the GATE of the external MOSFET through Cgs and can load the GATE node. Can you add capacitance at the source of the MOSFET (100uF electrolytic + 1uF ceramic) and check. If it does not help, add 10nF between GATE to source and check. Best Regards, Rakesh + +Rakesh, Thanks for the tip! This got us moving in the right direction. We found that current was leaking through the Zener D75 and also had an internal path through the hot-swap controller (U231) due to the noise from our downstream power stages. This leakage exceeded the 22uA (nominal) capability of the hot-swap controller. Our fix was to add a 100pF in parallel with D75 and a 220pF from pin 8 of the hot-swap controller (U231) to LGND. Have a great weekend! Matthew Swanson + +Hi Matt, Good to hear that. Let me know if you have any more questions. Regards, Rakesh + diff --git a/data/text/DLP2/898000 b/data/text/DLP2/898000 new file mode 100644 index 0000000000000000000000000000000000000000..84d3b5ac690742112b59d9de6a4fa3b393de062e --- /dev/null +++ b/data/text/DLP2/898000 @@ -0,0 +1,16 @@ +BQ27750: Number of Reset Register + +Part Number: BQ27750 Hello, I am trying to find out if there are any registers in the part which stores the number of resets taken by the device? I see that the Operation Status has a BIT 24: Initialization after Full Reset. Does this Bit get enabled when the device comes out of reset? Thank you, Sincerely, Praveen + +Hi Praveen, See my answers below. I am trying to find out if there are any registers in the part which stores the number of resets taken by the device? Yes. However, these registers are not open to customers. I see that the Operation Status has a BIT 24: Initialization after Full Reset. Does this Bit get enabled when the device comes out of reset? That bit should clear when the initialization is complete. Andy + +Hello Andy, Thank you for the response: Is there no way to access these registers to find out if there was a reset? When you say, "That bit should clear when the initialization is complete.", what exactly does this mean? Does it mean that when the gauge comes back on, and we try to read the Operation Status register this Bit will be cleared? Thank you, Sincerely, Praveen + +Hi Praveen, The one byte at the data flash address 0x4209 should be the number of full resets recorded by the gauge device. Note that you need to enable Lifetimes. Andy + +Hello Andy, Thank you for your response. This register does give me the reset count. A follow on question: 1. If the gauge takes a soft reset, does this register increment? Are there any other registers we can read from the data flash that tells us, if a soft reset occurred, vs a hard reset? Thank you, Sincerely, Praveen + +Also, is this only one byte? What happens when the number of resets > 255? Does the register roll over? + +That register should increment when a RESET command is sent or a POR occurs. Also, the max value of that register is 255. It will not roll over. I suggest double check using an EVM. Andy + diff --git a/data/text/DLP2/898019 b/data/text/DLP2/898019 new file mode 100644 index 0000000000000000000000000000000000000000..da4bc76f8a0aee23d98dff0f96f4335b62853fb8 --- /dev/null +++ b/data/text/DLP2/898019 @@ -0,0 +1,12 @@ +TPS65150: Ref. voltage much lower than in specs: All output voltages at 60% + +Part Number: TPS65150 I'm designing a board including a LCD power BIAS supply using TPS65150 based on its reference design. However all output voltages are about 60-70% of the calculated values. I measure on the reference voltage pin Vref 0.768V , much lower than the specified as 1.213V in the datasheet. Calculated Measured VGH 23 13.2 VGL -6 -4.1 VA 9.6 6.7 VCOM 2.9 2.9 Input voltage Vin=3.3V I only changed the feedback resistor values in the reference design to meet my voltage requirements: What is the reason of this heavy drop of reference voltage and how can I fix it? + +Hi, I have notified our expert regarding this topic. Please expect a response by 4/22/20. Thanks, Aaron + +Hello, I reviewed schematics and see couple of issues with it. 1. A 220nF capacitor is required from REF pin 20 to GND not from FBN to GND as your schematics shows. 2. Since LCD_AVDD is 9.6V and it appears that your LCD_VGH is ~19V (although you mentioned it to be 23V in the table above), you will likely need to use two stages of positive charge pump (charge pump tripler circuit to achieve the proper LCD_VGH voltage instead of a charge pump doubler that you currently have). Please see figure 34 in the datasheet for a charge pump trippler configuration. Please make the change I suggested in point 1 above first and see if its impact. As a second step, use charge pump trippler circuit and as described in my point 2. These two suggestions should resolve the issues with your design. Kind Regards, Liaqat + +Hello Liaqat, thank you very much for inspecting the schematics and finding my fault. The point 1 resolved my issue! I was just too blind and put the capacitor in the wrong place. Now I fixed it and get correct gate voltages. But one more question: I don't understand how to configure the VGH. You said, I have a "charge pump doubler". So V_GH=2*V_VS ? What part of circuit does that? Best regards Can + +Hello Can, Configuring VGH depends on your VGH voltage needs (set by the resistor dividers 1M and 68K at pin 12 and please see datasheet on how to calculate these resistor divider) and LCD_AVDD voltage from boost converter. A single stage of charge pump (two diodes two capacitors) as shown on you schematics would theoretically generate 2*LCD_AVDD but there are voltage drop across diodes and internal switches so actual charge pump output voltage will be somewhat lower, say approx 2V lower. I believe your LCD_AVDD is set to ~9.6V so you will get approx. (2*9.6)-2V at the charge pump output no matter what you set with the resistor divider. To get any higher voltage, you will need to use one more stage of charge pump as shown in figure 34 of the datasheet. Kind Regards, Liaqat + diff --git a/data/text/DLP2/898025 b/data/text/DLP2/898025 new file mode 100644 index 0000000000000000000000000000000000000000..15fb61a4d118f336bc0abb76ed1053bf74ade687 --- /dev/null +++ b/data/text/DLP2/898025 @@ -0,0 +1,12 @@ +TPS65910: The recommended connection for AM3352 RTC feature disabled mode + +Part Number: TPS65910 Hi Team, Would you please teach me the recommended connection for AM3352 RTC feature disabled mode? The device is as below. AM3352BZCZ60 TPS65910AA1RSL I checked the following document. But I couldn’t AM335x RTC related pin connections and the connection with TPS65910AA1 for RTC feature disabled mode. TPS65910Ax User's Guide for AM335x Processors http://www.tij.co.jp/jp/lit/ug/swcu093f/swcu093f.pdf AM335x Schematic Checklist /.../sprabn2a.pdf TPS65910x Schematic Checklist /.../swca139b.pdf Thanks and Best regards, Kuerbis + +Kuerbis, When the RTC is un-used, the TPS65910 Schematic Checklist says how to terminate the pins of the PMIC. OSC32KIN = GND (internal RC wiring) OSC32KOUT = Floating (internal RC wiring) VRRTC = Connect to a 2.2-µF filter capacitor (cannot be left NC) GPIO_CKSYNC = Floating CLK32KOUT = Floating I cannot tell you how to wire the AM3352 for RTC disable using TPS65910x, so I will need to re-assign this post to the Sitara processor team. + +Hi, On AM335x side the required connections are listed in the AM335x Schematic Checklist (/lit/an/sprabn2a/sprabn2a.pdf), section 2.14, Table 2, and section 2.14.1. + +HI Biser, AM335x Schematic Checklist used have section 2.14, Table 2, and section 2.14.1 for RTC. But it was removed in the latest version. So i'm in trouble Would you please tell me which document should I refer to?. Thanks and Best regards, Kuerbis + +HI Biser, Do you have any update for this? Thanks and Best regards, Kuerbis + diff --git a/data/text/DLP2/898104 b/data/text/DLP2/898104 new file mode 100644 index 0000000000000000000000000000000000000000..c420597210020b6529d2c7fa7a373c8b202b1025 --- /dev/null +++ b/data/text/DLP2/898104 @@ -0,0 +1,14 @@ +TPS54308: Noise/ripple + DC level issues on VOUT with increasing VIN + +Part Number: TPS54308 Hi. I'm have some of the same issues as /support/power-management/f/196/t/858796, however I'm only doing a single supply. 4,5V-26,4V to 3,3V. I followed the WEBENCH design (and have the same design as the 3,3V design in the above link). I have not tried replacing with a TPS54302. Let my try to explain what I'm seeing. From VIN = 4,3V-8,5V everything seems good. VOUT and SW looks reasonable. VOUT = 3,26V and 100mV peak-peak ripple (could be better according to simulations). Image 1: VOUT @ VIN = 8,4V Image 2: SW @ VIN = 8,4V Raising VIN seems to increase ripple on VOUT and SW begins to look wrong. Image 3: VOUT @ VIN = 8,7V Image 4: SW @ VIN = 8,7V Image 5: VOUT @ VIN = 11,7V Image 6: SW @ VIN = 11,7V Image 7: VOUT @ VIN = 15,7V Image 8: SW @ VIN = 15,7V Image 9: VOUT @ VIN = 20,2V Image 10: SW @ VIN = 20,2V As you can see ripple increases significantly. This proceeds until VIN = 20,4V. Around 20,4V a very high audible noise occurs. Above this, the signals look nice again, and power consumption drops to ~50% just after the signals look nice again. Image 11: VOUT @ VIN = 20,5V Image 12: SW @ VIN = 20,5V Image 13: VOUT @ VIN = 23,6V Image 14: SW @ VIN = 23,6V Some observations: 1. VOUT drop when increasing VIN. VOUT = 3,24V @ VIN = 4,7V /\ VOUT = 3,08V @ VIN = 23,6V 2. During the middle phase (8,6V - 20,4V) current consumption stays the same indicating poor performance from the regulator. In the outer phases were everything seems good we are pulling ~400mW. 4,7V VIN = 0,08mA 8,7V VIN = 0,06mA 11,7V VIN = 0,06mA 15,7V VIN = 0,06mA 18,7V VIN = 0,06mA 20,1V VIN = 0,06mA 20,7V VIN = 0,02mA This is mounted on a PCB from a PCB manufacturer. I have double checked all solderings and on a second board manually double soldered all solderings. This issue persists across 3 different prototypes. See below for schematic and PCB of circuit. Image 15: Schematic of circuit. Image 16: PCB layout of circuit. I'd appreciate some assistance ASAP as this product is pending my approval for he manufacturer to continue. Regards Mathias + +Hi again, Seemed that the issue was caused by unfiltered feedback. Placed a 100pF from VOUT to FEEDBACK (across R20 in above schematic) and everything seems to works as expected. Webench doesn't suggest this, and the TPS54308EVM-876 suggests not to place one either, however, not doing so resulted in the above scenario. TPS54302EVM-716 on the other hand suggests the filter capacitor. Regards Mathias + +Hi Mathias, The CFF cap is used to boost the phase at the crossing frequency. It's not a must but an option. The root cause to the issue might result from the board layout. Findings on the layout. 1. The FB trace is too close to the SW signal around the FB resistor of R20. 2. Inductor is too close to the IC. Leave some space margin would be better for the IC avoid noise from the inductor. 3. Suggest the trace on the D64 a little far away from the FB network resistors. 4. Suggest one 0.1uF cap at the input cap to filter high frequency noise. + +Hi Ryan, Thanks a lot for the reply. Makes sense and will be taken into consideration in future designs. Is there any formula or procedure to tuning the CFF cap size for optimum results? Regards Mathias + +Hi Mathias, The eq. 16 in the datasheet shows how to calculate the feed forward cap. + +Hi Ryan.. Thanks for stating the obvious. Must have overlooked that. Sorry for wasting your time. Regards Mathias + diff --git a/data/text/DLP2/898105 b/data/text/DLP2/898105 new file mode 100644 index 0000000000000000000000000000000000000000..9271c8e87a4ef93c67b8fa0172de578bddef2f1a --- /dev/null +++ b/data/text/DLP2/898105 @@ -0,0 +1,18 @@ +HDC2010: Getting wrong value of temperature for the first sample alone + +Part Number: HDC2010 Hello All, I am using MSP432P401R launchpad and using HDC2010 EVM kit to work on the sensor code. I have written a code which configures 1 sample per second and even with 5 samples per second. I am getting the data w.r.t the configurations. But the issue is with the first sample from the sensor which always gets wrong and that too for only temperature value. Humidity is getting correct. I am giving 1 sec delay before reading the data. Not sure what is happening with the first sample. I have iterated multiple times but same issue. Even the same issue when manually reading the data through I2C. Wondering why only Temperature data? PLease help. I2C Initialized! HDC2010: HDC2010_SoftwReset executed! HDC2010: Sample:0 HDC2010: hdc20100Temp = 32 hdc20100TempAsCelsius = -39.9194 HDC2010: hdc20100Hum = 30976 hdc20100HumAsRelative = 47.2656 HDC2010: Test case FAIL! HDC2010: Sample:1 HDC2010: hdc20100Temp = 28195 hdc20100TempAsCelsius = 30.9865 HDC2010: hdc20100Hum = 30995 hdc20100HumAsRelative = 47.2946 HDC2010: Test case PASS! HDC2010: Sample:2 HDC2010: hdc20100Temp = 28200 hdc20100TempAsCelsius = 30.9991 HDC2010: hdc20100Hum = 31008 hdc20100HumAsRelative = 47.3144 HDC2010: Test case PASS! HDC2010: Sample:3 HDC2010: hdc20100Temp = 28199 hdc20100TempAsCelsius = 30.9966 HDC2010: hdc20100Hum = 30979 hdc20100HumAsRelative = 47.2702 HDC2010: Test case PASS! HDC2010: Sample:4 HDC2010: hdc20100Temp = 28198 hdc20100TempAsCelsius = 30.9941 HDC2010: hdc20100Hum = 30990 hdc20100HumAsRelative = 47.2869 HDC2010: Test case PASS! + +Dear Tajpeer - i think the only way this could happen is if, after the very first 'start conversion' command is sent, you are not waiting long enough to read out the temperature registers 0x00 and 0x01. Because you get the %RH value back correctly, this indicates you are reading the registers 0x02 and 0x03 back separately, and after the correct amount of time has elapsed. I would recommend here that you look at I2C lines, from power up, to see what the actual behavior is of your code. FAQ on this topic is here: /support/sensors/f/1023/t/878721?tisearch=e2e-sitesearch&keymatch=HDC2010 and FYI, this is slightly different, because the example reads out temp and humidity registers all together, but will show you what to look at. I would also recommend that you don't use the SW reset (wasted clock cycles) and also to read out the 0x04 register in your code for 0x80, (after sending the start conversion and waiting at least 1.3mSec, if using the default 14 bit resolution settings) then if that passes, to then read out the registers 0x00 through 0x03 all at once. This will guarantee you get good data, from the start, as it will force your code to wait long enough. + +Hello Wyatt, Thanks for the reply. I have tried multiple iterations. and with each iteration, I had tried with different time delays like starting from 0.5 ms till 30 ms. But it fails to get the first sample. I even tried first getting the Humidity value ahead of Temperature value. And it fails to get correct values for both for first sample. As you suggested, I even tried with DataReady status with below code. i am reading the data only when this returns 1. This returns 1 but still got the wrong value. /* HDC2010 IsDataReady function to check DRDY_STATUS flag */ bool HDC2010_IsDataReady(void) { uint8_t txBuf[1]; uint8_t rxBuf[1]; uint8_t busId_1; /* I2C bus id */ uint8_t devAddr_1; /* Sensor address on the I2C bus */ bool isDataReady = 0; /* Default, data is not ready */ /* I2C bus ID */ busId_1 = 0; /* Sensor address on the I2C bus - ADR grounded*/ devAddr_1 = HDC2010_SLAVE_ADDRESS; /* Write Configuration Register */ txBuf[0] = HDC2010_INT_DRDY; mcu_i2cTransfer(busId_1, devAddr_1, txBuf, 1, rxBuf, 1); if(rxBuf[0] & 0x80) isDataReady = 1; Display_printf(display, 0, 0, "HDC2010: HDC2010_IsDataReady executed!"); return isDataReady; } + +Dear Tajpeer - Please put o'scope or logic analyzer on your hardware and capture, from power up - this will show us exactly what is happening. + +Hello Wyatt, I don't have oscilloscope with me now to capture the signals, due to covid-19. Let me trigger this thread once I get the proper signals to show and discuss. + +OK - will wait on you then - in the meantime, would recommend you check out examples we have on sysconfig or resource explorer, as they might also help you out, in finding your timing issue, in the absence of you having the equipment to troubleshoot with. I would also recommend getting a logic analyzer (which you might be able to order and receive via mail during these time) - these are infinitely helpful - i personally recommend the Saleae devices, in all my years of dealing with various protocols, this is the best one i have ever used, and I did order and receive one about a week ago, as i wanted to upgrade from their previous model, to include analog sampling ability. + +Till we get actual signals from logiz analyzer, I just want to show my code how I tried with different delays for getting the first sample from HCD2010 strating from 100Microseconds to 10ms. But with all the timing delays, we got the same results. Please suggest if you are getting anythign from the code below, =============================================================== void mcu_msWait(unsigned long msWait) { static delay = 1; /* * Add MCU specific wait loop for msWait. The unit is in milli-seconds */ // Delay(); usleep(delay*100); // In microseconds //usleep(msWait*1000); // ~2 ms delay++; Display_printf(display, 0, 0, "HDC2010: mcu_msWait: %d Microseconds", (delay*100)); } =============================================================== uint32_t HDC2010_tempread(HDC2010_Handle sensor) { uint8_t txBuf[2]; uint8_t rxBuf[1]; uint8_t tHigh; uint8_t tLow; uint32_t tmp; /* If AMM is disabled trigger conversion */ if (!(sensor->config & HDC2010_CONFIG_AMM_MASK)) { /* Reset AMM to start measurement */ txBuf[0] = HDC2010_MEAS_CONFIG; txBuf[1] = sensor->measConfig | HDC2010_MEAS_CONFIG_MEAS_TRIG_START; mcu_i2cTransfer(sensor->busId, sensor->devAddr, txBuf, 2, rxBuf, 0); /* Wait for conversion to complete */ mcu_msWait(sensor->convWaitTemp); } /* Read temperature register high byte */ txBuf[0] = HDC2010_TEMP_HIGH; mcu_i2cTransfer(sensor->busId, sensor->devAddr, txBuf, 1, rxBuf, 1); tHigh = rxBuf[0]; /* Read temperature register low byte */ txBuf[0] = HDC2010_TEMP_LOW; mcu_i2cTransfer(sensor->busId, sensor->devAddr, txBuf, 1, rxBuf, 1);= rxBuf[0]; /* Sign extend and combine */ tmp = ((uint32_t)tHigh << 8) | tLow; return (tmp); } + +Dear Tajpeer - the wait time you need to adjust is between you writing register 0x0F with 0x01 and reading back the results. In this case, I would recommend you do one or more of these suggestions. 1. Implement one shot mode to reveal to yourself how the delay needs to occur between the start of conversion and reading back the registers - if in default mode, you need at least 1300mSec between issuance of 0x01 to 0x0F register and expecting new values Here is a flow chart for you to follow: /cfs-file/__key/communityserver-discussions-components-files/1023/ONE_5F00_SHOT_5F00_HDC20x0_5F00_FIRMWARE_5F00_FLOW.pdf 2. Make a flow chart of your own code (since you are wanting to do automatic mode) and compare to these (this is with using DRDY/INT line and also without - two pages, two separate flow charts) /cfs-file/__key/communityserver-discussions-components-files/1023/AUTO_5F00_HDC20x0_5F00_FIRMWARE_5F00_FLOW.pdf you can also review this document, too ==> /lit/an/snaa312/snaa312.pdf + diff --git a/data/text/DLP2/898115 b/data/text/DLP2/898115 new file mode 100644 index 0000000000000000000000000000000000000000..b8911abc94a6c9c30a985fe320c0b5cfdfa0161b --- /dev/null +++ b/data/text/DLP2/898115 @@ -0,0 +1,8 @@ +1kw half brick DC / DC analog power supply scheme selection + +Seniors: Hello, Recently, I received a case of input voltage 100V, output power 1000W (24V / 42A), efficiency not less than 95%, half brick size (61 * 57.9 * 12.7mm). Is there any suitable circuit scheme recommended? I hope the circuit is simple, and analog control power is appropriate. Thank you. + +Hi zoujiangyilangcompany has two full bridge controllers which maybe of interest. LM5045 which is designed for telecoms input voltage range but can work up to 100V and I have see it designed into 800W and 1.4Kw designs. The other part is the UCC28951 which is a phase shifted full bridge controller, I have attached a schematic for a design example for UCC28950 which is a pin to pin compatible predecessor of the UCC28951.PMP4584_Rev_A_SCH.pdf Regards Peter + +Thank you very much. + diff --git a/data/text/DLP2/898121 b/data/text/DLP2/898121 new file mode 100644 index 0000000000000000000000000000000000000000..6850bfd974040026784395da7f2bc79fc28fdc73 --- /dev/null +++ b/data/text/DLP2/898121 @@ -0,0 +1,6 @@ +LM5170-Q1: Gain and phase graph calculations + +Part Number: LM5170-Q1 After entering the appropriate data in the LM5170DESIGN-CALC spreadsheet found in snvc205, I have determined the Buck and Boost mode voltage loop compensation parameters as given in Section 11 and Section 12 of the spreadsheet respectively. This has allowed me to find the digital coefficients by using the Bilinear transformation which is required since we're using a microcontroller to perform the duties of the analog compensator. (1) Is this the recommended/correct approach? (2) The Buck and Boost mode voltage loop graphs shown in the LM5170DESIGN-CALC spreadsheet show the gain and phase margins. Can you share how this was determined as I'd like to understand the correlation between the information entered into the spreadsheet and the graphs. Where can I find the calculations which produces these graphs? (3) The loads of our system will naturally vary. Would it be suggested to have coefficients at one particular condition or to have multiple coefficients for different conditions and select the most appropriate? + +Hi Ponsonby, Thank you for your interests in the LM5170. (1) You approach sound right. (2) There are two loops: the inner current loop and the output voltage loop. The inner voltage loop calculation is described in the datasheet section 9.12. The voltage loop is also a simple 1st order system if you put the loop crossover frequency at 1/10 or lower of the inner current loop crossover frequency. The transfer function can be obtained from Figure 53: when closing the voltage loop, the inner current loop is closed and the LM5170 is basically a current source. Not that the boost loop may have the right half-plan zero, as predicted in conventional boost circuit. (3) the circuit can be made stable over the entire load range with one compensation. However, this circuit has a diode emulation mode and in DCM (light load) the gain does drop and you may change the compensation in your digital algorithm to better improve the loop response. You may have two to three additional coefficients to cover shallow and deep DCM conditions. Thanks, Youhao Xi, Applications Engineering + diff --git a/data/text/DLP2/898126 b/data/text/DLP2/898126 new file mode 100644 index 0000000000000000000000000000000000000000..4b40a4bd38a0f40630c5881a26650bd11f1dc5c1 --- /dev/null +++ b/data/text/DLP2/898126 @@ -0,0 +1,8 @@ +LM5035: LM5035 is used for 100V Vin power supply，Will the HO port be damaged？ + +Part Number: LM5035 Hello there I see that the withstand voltage of the HO port of the LM5035 is 105V. If the power supply Vin is 100V and the PWM drive voltage is 10V, then the maximum voltage of the HO port will reach 110V, will it damage the HO port？ So how can the LM5035 be used to ensure that the PWM drive voltage reaches 10V when Vin is 100V? + +Hello zoujiangyilang, Yes you are correct. The maximum ratings for high side gate driver output are listed in the Absolute Maximum Ratings table in the data sheet The HB pin is rated at 118V HS is rated at 105V Regards John + +Thank you + diff --git a/data/text/DLP2/898130 b/data/text/DLP2/898130 new file mode 100644 index 0000000000000000000000000000000000000000..ca4bccb55bf7850fac5ee9beff5893aba24cfa2a --- /dev/null +++ b/data/text/DLP2/898130 @@ -0,0 +1,10 @@ +BQ27421-G1: Fuel Gauge Reading/Writting + +Part Number: BQ27421-G1 Hi everyone, I've included the bq27421-G1 into my prototype design and I want to read and write on the chip. Do you have any driver or any c code for this chip? Thanks in advance Nick + +See the cod below. Andy + +Thank you Andy, Are there any drivers for windows machines? Nick + +As far as I know, no. Andy + diff --git a/data/text/DLP2/898138 b/data/text/DLP2/898138 new file mode 100644 index 0000000000000000000000000000000000000000..3d1405355083196b1b84f75abc2556b39bf93285 --- /dev/null +++ b/data/text/DLP2/898138 @@ -0,0 +1,12 @@ +AWR2243: Which power rails and signals reference Analog ground (VSSA)? + +Part Number: AWR2243 I am trying to clarify, which power rails and signals reference Analog ground (VSSA) for layout and decoupling purposes? Thanks, Lauri + +Hello Lauri, all the 1.8V supplies and 1V supplies are referenced to VSSA. But we recommend using a single solid ground on the board, ie shorting VSS and VSSA to solid gnd plans on the PCB. Regards, Vivek + +Dear Vivek, Here's a list of "Analog" rails and signals, I have compiled based on your comment and datasheet. Please correct, if I missed any below referencing VSSA: VIN_18BB, VIN_18VCO, VOUT_14APLL, VOUT_14SYNTH, VOUT_PA, VIN_13RF1, VIN_13RF2 RX1-4, TX1-4, FM_CW_CLKOUT, FM_CW_SYNCOUT, FM_CW_SYNCIN1, FM_CW_SYNCIN2, CLKP, CLKM, OSC_CLKOUT. Thanks, Lauri + +Hello Lauri, Also the XTAL pins are referenced to VSSA. But could you clarify your intent here? Are you planning to separate the VSS and VSSA on the board? Regards, Vivek + +Dear Vivek, I had the XTAL pins already listed. I'd need the list of rails and signals to be accurate as yes, I am planning to separate the references on the board. The VSS and VSSA will have the same DC potential. Thanks, Lauri + diff --git a/data/text/DLP2/898142 b/data/text/DLP2/898142 new file mode 100644 index 0000000000000000000000000000000000000000..73aee7a2f8c5a6a8bcf58fcb4335f15c13cafc1f --- /dev/null +++ b/data/text/DLP2/898142 @@ -0,0 +1,12 @@ +UCC28950: Clarification required for Coss_QA_AVG value of spp20n60cfd Mosfet in SLUA560B document + +Part Number: UCC28950 Dearcompany Experts, In SLUA560B document Coss_QA_SPEC of spp20n60cfd is given as 780pF at 25V. And Coss_QA_AVG value calculated as 193pF.But in the datasheet of spp20n60cfd in Page number 8, there is a Coss Vs Voltage curve, if you read Coss at 400V which gives around 70pF which is too far than 190pF calculated.So what is the right value of Coss needs to consider in our design? Regards Aneesh + +HI Aneesh The problem is that it is very difficult to predict the effective stray capacitance at the switched node. First of course is the Coss of the MOSFET. The infineon data sheet gives a figure of 780pF at Vds of 25V but you can of course see that this capacitance is very non-linear as the drain / source voltage changes. The data sheet calculation tries to compensate for this by assuming that the capacitance vs voltage curve follows a square law (hence the square root in eq. 56 in the data sheet), but the result is of course an estimate. Possibly a better estimate would be to use the Co(er) specification in the MOSFET DS (83pF) to calculate the energy needed to achieve ZVS and to use the Co(tr) (160pF) value when calculating the delay times. Please remember that there will be additional stray capacitances at the switched node due to PCB tracks, MOSFET Tab to heatsink and especially transformer self capacitances. This is the main reason why it is difficult to know in advance what the capacitances will be - and why it is only when you have hardware available that you can fine tune the shim inductor and delay times. Regards Colin + +HI Aneesh The problem is that it is very difficult to predict the effective stray capacitance at the switched node. First of course is the Coss of the MOSFET. The infineon data sheet gives a figure of 780pF at Vds of 25V but you can of course see that this capacitance is very non-linear as the drain / source voltage changes. The data sheet calculation tries to compensate for this by assuming that the capacitance vs voltage curve follows a square law (hence the square root in eq. 56 in the data sheet), but the result is of course an estimate. Possibly a better estimate would be to use the Co(er) specification in the MOSFET DS (83pF) to calculate the energy needed to achieve ZVS and to use the Co(tr) (160pF) value when calculating the delay times. Please remember that there will be additional stray capacitances at the switched node due to PCB tracks, MOSFET Tab to heatsink and especially transformer self capacitances. This is the main reason why it is difficult to know in advance what the capacitances will be - and why it is only when you have hardware available that you can fine tune the shim inductor and delay times. Regards Colin + +Dear Colin, Thanks for clarifying my doubt. Regards Aneesh + +Hi Aneesh That's excellent - I'm going to close this thread. Regards Colin + diff --git a/data/text/DLP2/898159 b/data/text/DLP2/898159 new file mode 100644 index 0000000000000000000000000000000000000000..a6357d77cf227d41e1c594bfafd3574658be3106 --- /dev/null +++ b/data/text/DLP2/898159 @@ -0,0 +1,8 @@ +UCC28600: Reference Schematic Question + +Part Number: UCC28600 Hello, I am using the UCC28600 to design a power supply with a 19V, 5A output. I came across the PMP5029 reference design which features a 19V, 2.2A output. First Question: Is the PMP5029 capable of outputting 5A? Second Question: What controls the output current capabilities of a flyback converter? is it just based on the input voltage and the switching frequency of the flyback controller? Attached is the PMP5029 schematic for reference/ slur385.pdf + +Hello, I don't believe the UCC28600 is capable of handling 5A. However, to get more power out of it you would have to redesign the transformer for more storage energy by increasing the primary magnetizing inductance. You can either use the excel design tool or webench to calculate the primary magnetizing inductance. You would have to increase your input and output capacitor bank by a factor of 5/2 and adjust the current sense resistor. This can be also verified and calculated with the webench tool or excel design tool. Regards, + +Ok, thank you. That is the conclusion I came to as well. I am a little confused when you say "I don't believe the UCC28600 is capable of handling 5A". I thought all that mattered was the amount of energy stored in the core? Doesn't the UCC28600 just try to maintain a certain voltage drop across the load? Edit: What section of the datasheet has the maximum Current, Voltage, Power ratings of a particular controller? Edit 2: There are some graphs on the UCC28600 that have data at > 5A such as efficiency vs output load, voltage vs current. + diff --git a/data/text/DLP2/898174 b/data/text/DLP2/898174 new file mode 100644 index 0000000000000000000000000000000000000000..ce17b80cd2104f04509bac85926cd5b447f02e35 --- /dev/null +++ b/data/text/DLP2/898174 @@ -0,0 +1,10 @@ +TL431: Negative reference voltage generation using tl431 + +Part Number: TL431 Hii Recently i went through a circuit using tl431. I have -5V input need to generate -3V constant reference voltage. Can i use tl431 to generate -3V constant. Trying to simulate the circuit but not working. How to calculate the resistor values Regards + +Hi Sneha I simulated your circuit incompany TINA tool as follow - Resistor calculation equation will be same as specified in figure 21 in the data sheet. Vout = VKA (1 + R1 / R2) Vout = 3V and VKA ≈ 2.5 . You can put the values in the equation and find out the ration of R1 and R2. Please keep R2 min = 10k and make sure TL431 is getting Imin current as specified in the data sheet. Regards Trailokya + +Hii Thanks for the reply. I would like to know what is the max value of c1 can be kept. Also if I want to draw an output current of 100mA. Will this support by changing the r3 value. + +Sneha You can refer figure 16 in the data sheet for cap selection. VKA = 3 V will be equivalent to curve A . For 100mA current, cap range (1nF , 10nF ) and (2uF , 10uF ) are stable. Cap range (20nF , 1uF) is unstable. Value of R3 will be 20 ohms for 100mA current. It should work fine. The data sheet plot for stability is given with R3 = 150 ohms. My recommendation is to put CL either near to 1nF or near to 10uF to make sure the circuit is always stable. Regards Trailokya + diff --git a/data/text/DLP2/898197 b/data/text/DLP2/898197 new file mode 100644 index 0000000000000000000000000000000000000000..00e55b875c9b9ffd9da6b650500e65e47ed161ac --- /dev/null +++ b/data/text/DLP2/898197 @@ -0,0 +1,12 @@ +UCC28950: Powering and Grounding Issue + +Part Number: UCC28950 Hello , I'm designing a system wich has a 40V output voltage , but I could not understand where to connect the GND of the IC GND is connected to the output voltage in the reference design like in the picture below. So this is the reason that I'm confused. Normally I wanted to feed the controller's VDD and GND with a flyback converter wich has 12V output. But now also do I have to connect the GND of the Flyback converter to the power stage wich has 40V output? I will be happy if you help me. Thanks Henk + +Hi Henk The short answer to your question is - YES - here's a markup of the schematic showing where the output of the Flyback goes. BTW - I'd suggest you use the UCC28951 instead of the UCC28950 The UCC28951 device is an enhanced version of the UCC28950. It is a fully compatible drop-in replacement for the UCC28950. Refer to application note SLUA853 at /lit/an/slua853/slua853.pdf for more details. The UCC28951 is typically the better choice, especially for applications where the system may have to operate simultaneously at a duty cycle> 90% and current limit. I don't know if you already have a Flyback design in mind but the PMP8787 reference design might be of interest - /tool/PMP8787 Regards Colin + +Thank you for the quick response. No , I dont have a flyback design now. Can I use this flyback controller for more outputs? like to supply to re-inforced igbt/mosfet drivers and the ucc28950 controller. + +Hi Henk The reference design is a single output 12V at 500mA - that should be enough to supply the controller and driver current. If you need multiple, isolated outputs then you would need to redesign the transformer, adding a winding, a diode and output cap for the second output. You could use Webench to increase the power output if 500mA were not enough - /design-resources/design-tools-simulation/webench-power-designer.html?utm_source=google&utm_medium=cpc&utm_campaign=app-null-null-WEBENCH_Ad-cpc-lp-google-wwe&utm_content=WEBENCH_Ad&ds_k=power+supply+design+tool&DCM=yes&gclid=EAIaIQobChMIn5XXzOD76AIVUKWaCh3K-wcuEAAYASAAEgJ_4PD_BwE&gclsrc=aw.ds Let us know if you have any other questions. Regards Colin + +Thank you for the suggestions and fast response, Have a good day. + diff --git a/data/text/DLP2/898205 b/data/text/DLP2/898205 new file mode 100644 index 0000000000000000000000000000000000000000..390a3afc7f540c40ecb68639206af28506aace38 --- /dev/null +++ b/data/text/DLP2/898205 @@ -0,0 +1,16 @@ +Compiler/DLP-ALC-LIGHTCRAFTER-SDK: Create Gray Patterns + +Part Number: DLP-ALC-LIGHTCRAFTER-SDK Tool/software:company C/C++ Compiler Hicompany I want to create gray patterns horizontal and vertical for structered light with dlp4500 evm but I can't use samples codes(generate_gary_code_patterns) which is in dlp-sdk? + +Hello Onur, I am going to get this to the team that supports the DLP4500. Fizix + +Hello Onur, This SDK is not supported on DLP4500 /DLPC350. Please use the GUI to generate the pattern and drive the EVM. The other option is to use DLP3010-LC and DLP2010EVM-LC /tool/DLP2010EVM-LC or DLP3010EVM-LC with API library. regards, Vivek + +I tried but when I want to create an output image, the output image is only black. You can see this in the video recording I shot + +Hi Onur, Could you kindly provide the image to us so that we can test on our side? Thanks & Regards. Hirak. + +Thank You, I solved my problem from TI's youtube videos. + +Onur, I am glad to hear that issue is resolved. regards, Vivek + diff --git a/data/text/DLP3/898207 b/data/text/DLP3/898207 new file mode 100644 index 0000000000000000000000000000000000000000..7d949f2e5c5b91a7ce3ab6b77d1c7ebe1c68660d --- /dev/null +++ b/data/text/DLP3/898207 @@ -0,0 +1,24 @@ +BQ27750: Some times lost control of external FETs + +Part Number: BQ27750 Hello! I has build LiPo batteris packs controlled by BQ27750. It was a big mistake to use the 27750, but it’s too late to change anything. Device work, but some times disconnect batteris from charge or from load OR from both charge and load. When I connect BQ studio to batterie pack BQ27750 says that all fine and FETs are switched on. But if I try measure resistence of external FETs - them are "closed" (switched off) and on GATE pin of FETs is around 2-3 volts. Nothing indicates this condition in BQ Studio. To make device back to life I sending Reset device command to BQ27750 from BQ Studio. And after this action all work fine again.... some time.... I have more than 2000 pcs devices with this problem. Problem became SOMETIMES. I can't find conditios of this. What I do wrong? And how to resolve this problem? + +Spider, The bq27750 can disable the FETS for numerous reasons. If after a reset the FETS are enabled then switch to disabled this leads me to believe you are triggering a time based protection event. If you want to investigate yourself, please make sure you are refreshing the registers screen in bqStudio so you can see updates as they happen. Pay specical attention to the "Protection Status" registers. Please provide a log file from bqStudio and a GG file from the data memory. Thanks, Eric Vos + +Ok. I'll make log when it happen again. Why voltage at Gate pins is around 2-3 volts? When FETs is off- this value is ZERO, when is on - around 12V. Why sometimes is 3v? + +Hello Spider, Can you provide a scope shot and also where you are measuring? Gate pins should be zero with respect from the gate to source (in this case pack+), can you measure that voltage? I believe if the protection FETs are off, that voltage should be zero. + +Before Reset but with Closed FETs: After reset and with Opened FETs (see to Log panel): xxxxx.log + +Spider, In the above bqStudio image you have CUV tripeed which would cause the discharge FET to turn off. in the 2nd plot it is not set, I believe you are tripping the protection which is killing the FETS. Thanks, Eric Vos + +I understand this. But how charge device when both FETs are closed? Be careful! At above bqStudio images Charge FET are opened, BUT in real it is Closed. You can see that on photos. That is my problem! :facepalm: + +Spider, this is an issue with your configuration if you are triggering a CTO and CUV. You should change CUV to recover when a charger is detected thus the CUV event will release when charging starts. I suspect the CTO timeout is way too low. this should be in 1000's of seconds. Thanks, Eric Vos + +Manual control of FETs from bqStudio not work too. In GUI I see that FET is ON but in real it is closed. It is normal? + +Spider, You should not be manually controlling the FETS, but instead let the gauge do the control. You writing to manually control would not work with protection activated. Thanks, Eric Vos + +Where you see that protection is activated? I see that Charge FET is ON on first screenshot of bqStudio. But really FET is OFF. + diff --git a/data/text/DLP3/898211 b/data/text/DLP3/898211 new file mode 100644 index 0000000000000000000000000000000000000000..a3746e14b836390c762fc376ad5272a62ed7111a --- /dev/null +++ b/data/text/DLP3/898211 @@ -0,0 +1,10 @@ +TPS62180: TPS62180 Step Model + +Part Number: TPS62180 Hi there, I would like to use the TPS62180 IC for my power application. For layout design, I need to use the STEP model for pcb library. There is no STEP model for it. If possible, would you send it to me ? Thanks! + +Hi Ali, I do not see a step model available on in the tools and software page so I will see if we have one somewhere else. /product/TPS62180/toolssoftware Anthony + +Hi Ali, There wasn't one existing so I have submitted a request for this to be created and will share it once I have it. + +STEP file is attached. Let me know if you any further help. /cfs-file/__key/communityserver-discussions-components-files/196/IC_5F00_TPS62180YZFR_5F00_DSBGA24.STEP + diff --git a/data/text/DLP3/898214 b/data/text/DLP3/898214 new file mode 100644 index 0000000000000000000000000000000000000000..af0d98fde96439b93d6d4932796977e565230026 --- /dev/null +++ b/data/text/DLP3/898214 @@ -0,0 +1,10 @@ +LM5030: Push pull converter Application circuit + +Part Number: LM5030 Hicompany Team, I have below query in LM5030 Current mode push pull converter application circuit. 1)Zero frequency (Fz) formed by R14 and C18 for cancel opto pole? 2)How plant and opto pole compensated by error op amp? Regards, Kubendran + +Hello Kubendran G1 Your question refers to Figure 8 of the LM5030 data sheet. R14 and C18 is a high frequency filter that is placed to eliminate any switching noise pickup on the COMP input. Its function is to filter out any parasitic noise pickup due to pcb layout. It is not part of the classical feedback network. Your question on the compensation method use in this application can best be answered by studying any or all of thecompany seminary papers. These papers are located here. Regards John + +Hi Sir, Thank you for your reply. Please share any specific document for opto coupler based loop compensation. I searched slope compensation like UC1846 which is differently implemented than LM5030. For additional slope compensation how to calculate required resistor value to avoid oscillation ? Regards, Kubendran + +Hello, Please check the reference I have provided for the required information. Regards John + diff --git a/data/text/DLP3/898232 b/data/text/DLP3/898232 new file mode 100644 index 0000000000000000000000000000000000000000..e927fab793d2ddf49b475af3a4e8d8928437565f --- /dev/null +++ b/data/text/DLP3/898232 @@ -0,0 +1,14 @@ +TPS61193-Q1: fault will not be triggered when SW pin exceeds max current + +Part Number: TPS61193-Q1 Dear expert: It’s found that fault will not be triggered when SW pin exceeds max current. Since application condition where the 2A limit is exceeded continuously is not allowed, does tps61193 has any mechanism to protect against this case? BTW, how to understand OCP described in “extensive fault detection feature”？ + +Hi Lin, I have following questions according to your description. How long does your current of SW exceeds 2A last? Can you provide any waveforms? + +Hi Charles To separate UVLO and OCP, my Vin is supplied by 12V, and DCDC inductor is supplied by 4V, respectively. When this 4V is decreased slowly to 2.5V, no fault is triggered. This illustrates that pin SW over current will not trigger fault. Moreover, Vin is supplied by 4V, and DCDC inductor is supplied by 12V, respectively. When this 4V is decreased to 3.95V, fault is triggered immediately. This illustrates that pin UVLO will trigger fault. So there’s no need to provide waveform. Looking forward for your reply and thanks! + +Hi Lin, BTW, how to understand OCP described in “extensive fault detection feature”？ When the transient SW DC current exceeds 2A, it will lasts for 1.5s and then the current limit is automatically increased to 2.5 A for a short period of 1.5s. And then this total 3s periods repeats until thermal shutdown. To ensure the SW DC current exceeds 2A, please also provide your load current and the value of inductor when the input voltage is decreased slowly to 2.5V. I suggest that you measure the current actually. Please also note that the table 3, the SW DC current OCP is not included in the fault detection. However, if the SW DC current OCP happens, the behavior of chip is described in my first reply to your question. You can check this by measure the inductor current through current probe. Hope this helps. + +Hi charles Thanks a lot! Surely SW current decreases and backlight darkened as VIN decreased to 2.5V, as you said. OCP is not triggered because no thermal down happened in my application. + +Hi Lin, Great! Please click the "resolved" and I will close this thread. + diff --git a/data/text/DLP3/898236 b/data/text/DLP3/898236 new file mode 100644 index 0000000000000000000000000000000000000000..b36053098db3aa5131b144a4c1308d45a24657b3 --- /dev/null +++ b/data/text/DLP3/898236 @@ -0,0 +1,8 @@ +LM5119: Odd behavoiur in interleaved mode + +Part Number: LM5119 I have an LM5119 based design, with interleaved operation (single output). The output is well regulated and stable and the switching waveforms look good. However, I notice that that side 2 of the converter stops switching when the input voltage goes above 50V. When the input voltage is reduced below 50V, side 2 starts switching again. Side 1 does not exhibit this behaviour. The EN2 pin is NC (so side 2 is always enabled). These tests are being performed at no load. What are possible reasons that this could occur? I ask, because this behaviour is eventually followed by catastrophic failure of the LM5119, and I am suspicious that this unexpected behaviour is a clue as to what is going on. Catastrophic failure always occurs at higher voltages, although I have now seen it at 50V input voltage. The switch node ringing is well controlled and does not go anywhere near the device's 65V rating. Kind regards, Andrew + +Hi Andrew, Can you provide schematic in pdf file? Thanks Qian + +Hi Qian, Thanks for responding so quickly. I have found the problem. I have an extra resistor feeding the summing node at the centre of the potential divider that drives the FB node. This is driven by a D2A and allows mer to pull the voltage. Because it comes from a long trace, I thought it would be wise to have a capacitor to ground at the end of this line, just before the extra summing resistor. Unfortunately the ground I chose was close to of one of the half-bridges, and therefore subject to high current, and was probably introducing switching noise into the summing node. I suspect that this is what was causing the odd behavior. When I removed the capacitor, the whole system became docile again and no further catastrophic events have been observed, even at maximum input voltage with large step changes from the D2A. It would seem to be far better to (a) not introduce noise at this rather critical point in the circuit, and (b) allow the loop filter to do its job. Kind regards, Andrew + diff --git a/data/text/DLP3/898256 b/data/text/DLP3/898256 new file mode 100644 index 0000000000000000000000000000000000000000..b8bd099a7d7c9a614ba790f8cbb01f964a1a306a --- /dev/null +++ b/data/text/DLP3/898256 @@ -0,0 +1,10 @@ +UCC28950：Output short circuit protection and over current protection + +Part Number: UCC28950 Can this IC provide DCDC output short-circuit protection and over-current protection? What is achieved by? Is it achieved by cycle-by-cycle current limit or peak-current mode control? + +Hello The UCC28950 and UCC28951 both provide over current and short circuit protection. Please have a look at the section of the Data Sheet dealing with this topic - I've included the most relevant information below. If the signal at the CS pin plus the added slope compensation ramp (see Fig 36 in the DS) reaches 2V the Cycle-by-Cycle ILIM comparator trips and terminates the switching cycle. As this overload condition persists then the SS/EN pin is discharged and switching stops once the SS/EN pin drops below the Hiccup threshold (typ 3.6V). Note that this mechanism is active in both Voltage Control Mode and in Peak Current Control mode. Regards Colin + +Alright, thank you very much. It's just not quite certain that short circuit protection can be achieved by primary limitation. In my understanding, secondary direct shutdown is reliable. Now I'm sure. + +Hello Output SHORT CIRCUIT protection using the primary current works and is effective and uses the primary current sensing network which is needed in any case for peak current mode control (PCM) or for current limiting (Voltage Mode) so that there are no added circuit components. Hiccup modes reduce the average power dissipation while in short circuit but if you are using the primary current to control the output then the currents during the active part of the hiccup will be larger as Vin increases and smaller as Vin decreases. Normally Vin is from a PFC stage so Vin is relatively fixed so this behaviour is not a problem. If Vin varies over a wide range then it might be necessary to add a separate output current limiting circuit, but you will still need to sense the primary current for control purposes. Regards Colin + diff --git a/data/text/DLP3/898265 b/data/text/DLP3/898265 new file mode 100644 index 0000000000000000000000000000000000000000..0e64213b604060029d287eece9b3bfe73f04763c --- /dev/null +++ b/data/text/DLP3/898265 @@ -0,0 +1,24 @@ +PGA460: Capture Analog echo data form PGA460 + +Part Number: PGA460 How many ways to Capture Analog echo data form PGA460? I want to extract eigenvalues of echo data,and process the echo data. 1) Test pin? What is the abbreviation of ASC 2)Echo data dump from UART? 3)Echo data dump from USART? How can I set and operate? + +user6060721, There are three methods of extracting the echo envelope data from the PGA460 as you've noted: 1) Analog output: If you want to use your own ADC to capture the amplified analog output, then set the TEST_MUX value to 0x01, and capture from the TEST pin. 2) Echo data dump: The PGA460 stores 128 bytes of the echo envelope time of flight activity. This is a heavily down sampled version of the digital signal processed output to help users to locally set the threshold values. If you don't require a high resolution capture of the post-DSP output, then use this output. You will need to set DATADUMP_EN=1, send a Preset 1 or 2 burst//listen command (CMD 0-3), wait the equivalent record length time, then read back the Echo data dump by sending CMD 7. This can be done through UART, USART (SPI), or OWU. 3) Direct data burst capture (USART/SPI only): This mode can provide the ADC output at an 8-bit 1MHZ rate or 12-bit 500kHz rate. The PGA460 does not locally buffer any of the direct data burst, so you will need an MCU or external memory to store the clocked out data in real time. This mode is recommended for users that intend on applying their own DSP routine. This is similar to the analog output, but will be digitized for you by the PGA460, removing the need for an external ADC. This mode will require you to send a Preset 1 or 2 burst/listen command through SPI, then immediately afterwards continuously send an 8MHz clock signal the SPI-SCLK pin to get envelope data from the SPI-MISO pin. + +Thanks. When we use debug tool PGA460-Q1 EVM，the tool used Echo data dump through UART to capture the Echo envelope. Is this right? + +What is the signal path of Echo data dump，thanks + +user6060721, Yes, the PGA460-Q1 EVM GUI defaults to displaying the Echo Data Dump plot through UART, which is the output stage of the nonlinear scaling block (last stage of DSP) from Figure 35. To change the GUI graph mode to the Direct Data Burst (USART/SPI) output, you can go to Data Monitor --> Graph --> Graph Mode, and select which Direct Data Burst output stage you want to display (ADC output or a DSP stage). Note, the GUI takes a couple of seconds to capture the Direct Data Burst data, so please wait and don't think the GUI has crashed. The longer the record length time, the longer the update time after clicking START. + +When I debug my own PGA460 device. After I load memory Map,I can not connect PGA460 through OWU interface. memory map is the attachment. GRID_USER_MEMSPACE-2020-03-13_audiowell_58K_280cm.txt + +And when I load memory map successfully，the threshold is wrong. So,I have two confuse： 1.What is the right procedure of connect PGA460 through OWU 2.When debug through OWU，can I load or save memory map，how is the right procedure？ The user guide is very brief about OWU debug， thanks + +user6060721, When I checked your register map text file, I found that address 0x1E is set to a value of 0x0F. You need to change this value to 0x8F so that the IO_IF_SEL bit is set to '1' for One-Wire UART mode. Right now it is indicating to use IO-TCI mode, which is why you may be experiencing difficulties loading the file. You can save and load the register map text file by OWU through the Memory Map page just as you would in UART mode. Please see the PGA460-Q1 EVM GUI's OWI Evaluation for an External Module (Video Demonstration): PGA460-EVM-GUI-OWIEvaluation-VideoDemo.zip on the PGA460 E2E FAQ.page for additional details on running the GUI in OWU mode. + +Akeem Whitehead: I can read EDD through OWU.My GUI is Rev.1.0.2.0 But when I reload my memory map(the memory map is saved by OWU mode in GUI),but GUI display incorrect. especially the Theshold，can not load from the memory map.When I click T-to-U，there is an error. GRID_USER_MEMSPACE-2020-04-24_194009.txt + +user6060721, Note that the "T-to-U" button means "copy threshold register values to USER_DATAx register values". You don't want to use this button if you are attempting to load the threshold values to the Threshold tab of the GUI. When you load the memory map txt file, the Threshold tab values should update automatically, though you may have found a GUI bug. Try these steps: When you first start the OWI mode of the GUI, the first thing you should do is toggle any of the threshold values under the Threshold tab. For example, click up or down on P1 Time 1. Run burst/listen command using the RUN button. The echo data dump and thresholds should now be displayed. The threshold will be random since the threshold values have been properly loaded yet. After the first burst/listen command, then try loading the txt file in the Memory Map page. The correct threshold time and level values should now show under the Threshold tab. Let me know if this works. I will check my GUI code to see where a potential bug may exist. + +Akeem Whitehead, 1.When I first start the OWI,I adjust threshlod P1 time1 from 600 to 1400, 2.After run burst and listen,threshold change to 1400 all. 3.After I Load memory map,there is a note,I clicked yes. 4.After restart,the threshold is wrong 5.Attachment is my memory mapGRID_USER_MEMSPACE-2020-04-24_194009_OWU.txt + diff --git a/data/text/DLP3/898268 b/data/text/DLP3/898268 new file mode 100644 index 0000000000000000000000000000000000000000..5a8c4fbc784c9c971866d7016aac1eb876d16610 --- /dev/null +++ b/data/text/DLP3/898268 @@ -0,0 +1,10 @@ +BQ28Z610: Learning cycle for battery replacement? + +Part Number: BQ28Z610 Hello, My product has a removable battery pack, and the bq28z610 is mounted on the application side. What should I do if I don't want to reprogram the golden file every time the battery is replaced? Can I instruct the customers to run a full discharge-relax-charge-relax-discharge-relax cycle after replacing the battery (Qmax would be capped by the Qmax delta I guess)? Or can I write some parameters (just the Qmax Cells and Qmax Pack are needed to change right?) to the bq28z610 data memory (customers can only replace with new batteries in this case)? Thanks. + +The bq28z610 is a pack side gauge. It should reside within the battery pack or on the main board of the system with non-removable batteries. You need to use a system side gauge for a removable battery pack. I would suggest you program the golden file since your customers replace the batteries with new ones. Andy + +Is the option to rewrite specific parameters to bq28z610 data memory feasible? If yes, what parameters should I rewrite? + +I would suggest you dump a dt.fs file and then program this file to the gauge device. Bascially, you just program the entire data flash. Andy + diff --git a/data/text/DLP3/898274 b/data/text/DLP3/898274 new file mode 100644 index 0000000000000000000000000000000000000000..f616e88f1382a4deeec33e8897e5fa98523289aa --- /dev/null +++ b/data/text/DLP3/898274 @@ -0,0 +1,22 @@ +TPS659411EVM: PMIC TPS65941X + +Part Number: TPS659411EVM Hi all, I am designing the J7 platform base on SOC:DRA829 and PMICA:TPS659413 and PMICB:TPS659411, we are designing the SOP products, there is something need your help: 1 What is the timing sequence between VCCA(3V3),nPWRON/ENABLE of PMICA and VOUT_LDOVINT of PMICA? since I think the input signal nPWRON/ENABLE will be behind the output signal VOUT_LDOVINT which will ensure the synchronization of PMICA and PMICB, can you provide me with the exactly number of the time sequency? 2 According tocompany reference design: J7 EVM board, only PMICA have the wakeup function from GPIO4, and PMICB will follow the standard startup sequence process(like high level input signal on nPWRON/ENABLE) , my quension is that in real SOP product is the PMICB in this design can will be wakeup from the LP_standby state?we need to meet the quiescent current requirement. thanks! Best Regards, + +Hi, VCCA is the power for PMIC A and PMIC B. Once this pin is supplied, the device internal regulators will also be supplied (LDOVINT and LDOVRTC). Then, the PMIC will load the default NVM settings from memory and wait in STANDBY mode. For the devices to turn on, use the ENABLE pin of PMIC A. This will cause both PMIC devices output rails to execute the power sequence to supply the Jacinto 7 processor. The PMIC A and PMIC B devices stay in sync through their SPMI communication (connecting GPIO_5 and GPIO_6 between the two devices). For full features of the power architecture for Jacinto 7, see our user guide: /lit/pdf/slvubr0 Thanks, Nastasha + +Nastasha, Thanks for you answer! I have look through the document, there is someting useful for me, but I still has some questions. I would like to disscuss with your for the following 3 conditions, 1 First Startup( from power off to power on) 2 Wakeup(from LP_standby mode to normal mode) 3 Power off(From normal mode to LP_standby mode) I want to know the timing relationship of EN, LDOVINT of both PMICA and PMICB as well as the data communication state duing the change of the state of EN, LDOVINT in the 3 conditions each other! The figure description is preferred. thanks! Best Regards, + +Hi, We have a diagram in the datasheet that is called "Device Startup Timing". This refers to the times that it takes to startup. These values depicted in the diagram are also specified in the specs section of the datasheet. Note that these specs will tell you the time from OFF to STANDBY. OFF to ACTIVE timing depends on how and when you are enabling the transition to the active state with the ENABLE pin. LDOVINT and LDOVRTC are included in this diagram. Power off timing will depend on the power sequence executing (whether it is an immediate or sequenced power down event). These timing are depicted in the user guide I previously shared. LP_STANDBY to STANDBY will go through BIST before going into the standby state, so only that timing will need to be considered to go to standby state. STANDBY to ACTIVE state timing is dependent on the power up sequence timing shown in the user guide. Please let me know if this helps. Thanks, Nastasha + +Nastasha, The Figure 5-5 solved my first question of first start up timing sequence, but I haven't see the wakeup timing sequence since in wakeup state it is something different from first startup, eg., the VCCA is always on, when the CAN wakup signal in, the system will execute the NVM first or wakeup the VINT & VRTC first? And at this time when will the Valid On Request signal be active? before NVM or after NVM? Thanks! Best Regards, + +Hi, I think I understand your question. This is how you turn on the system: 1. VCCA is powered 2. CAN event turns on the PMICs (pulls ENABLE pin high or uses GPIO wakeup functionality) Please let me know if I interpreted this correctly. In this case, once VCCA is powered, LDOVINT and LDOVRTC will be immediately powered. Then, NVM will load. Then BIST will run. Then, the device will wait for the CAN event. Once the CAN event occurs, the power sequence will start immediately. If the CAN event happens earlier, the device will wait until the previous steps are done, and then begin powering up. The first steps take 5-10ms (each step is more precisely defined in the datasheet). Then the power sequence takes ~15ms. If the CAN event happens at least 5ms after power is supplied to the PMIC, then there shouldn't be any delay. The only exception is if the CAN is waking up the device from LP_STANDBY. Then, the device will go through BIST before powering up. There is a figure in the datasheet (5-38) that may also help explain these scenarios. Let me know if this helps! Thanks, Nastasha + +Nastasha, Thanks for your reply. As for this scenaria- Wakeup from LP_STANDBY state, my understanding is firstly the CAN_WAKEUP signal will be asserted, then system of PMICA will go through NVM and BIST before powering up, then LDOVINT active, then PMICB Enable(at the same time the PMICA will be also enable by an external control signal), then PMICB go through NVM and BIST, then by comunication of SPMI(I2C) the two PMICs will work synchronous,is it right? Best Regards, + +Nastasha, Could you help to check if my understanding is right or wrong? Thanks! Best Regards, + +Hi, When waking up from LP_STANDBY, the LDOVINT of PMIC A will turn on immediately, which will also enable PMIC B (since LDOVINT of PMIC A is connected to ENABLE of PMIC B). Then, both devices will load NVM and complete BIST in parallel. Then, through SPMI communication they will start the power up sequence together. Hope this helps! thanks, Nastasha + +Nastasha, Thanks! Best Regards, + diff --git a/data/text/DLP3/898285 b/data/text/DLP3/898285 new file mode 100644 index 0000000000000000000000000000000000000000..8a88d513a7ac751f1df23b119cf5d25ec876a4e5 --- /dev/null +++ b/data/text/DLP3/898285 @@ -0,0 +1,10 @@ +TPS62130: What's the negative transient spec for SW node + +Part Number: TPS62130 Dear Team, Customer want to know what's the negative transient spec for SW node. TPS62130 datasheet only have constant voltage spec. They are looking for transient spec. like shown in TPS53318. ( -7V, <20ns) Shaq + +Shaq, Unfortunately, it is not specified. If you post a waveform, I can give you my opinion. + +Hi Tucker, Here is customer's waveform. There are 6.5ns duration lower than -0.3V. + +Shaq, That looks about normal. If you use a differential probe (preferred method) you will see it significantly reduced. + diff --git a/data/text/DLP3/898296 b/data/text/DLP3/898296 new file mode 100644 index 0000000000000000000000000000000000000000..12fc29c6376ba6f0e09c390f2e47c3bf667c17ab --- /dev/null +++ b/data/text/DLP3/898296 @@ -0,0 +1,10 @@ +LM2596: feedforward capacitor selection + +Part Number: LM2596 Hello team! I got the question for "cff" from the customer. The datasheet shows Equation6 and uses the 15.4k for R2 for example. However, the calculated value and the recommended value look different... Which value should we use for the actual design? Best Regards, Kazuki Kitajima + +Hi Kazuki, I will check and update you later. B R Andy + +The equation is mostly an approximation to get a starting value for the CFF. The values in the table have been tested for best overall performance. I would plan on using the values in the table. However, the point of the equation is to ensure that the user leaves a footprint on the PCB for a feed-forward capacitor if needed. The actual value can be adjusted to optimize performance in the actual application. + +Andy-san, Frank-san, Thank you for your advice! I'll let the customer know table3 value should be good for. Best Regards, Kazuki Kitajima + diff --git a/data/text/DLP3/898303 b/data/text/DLP3/898303 new file mode 100644 index 0000000000000000000000000000000000000000..b80babd3135bd7f99f90e9d3bfaa501441567b6c --- /dev/null +++ b/data/text/DLP3/898303 @@ -0,0 +1,14 @@ +UC3525A: Regarding RT, CT and RD + +Part Number: UC3525A Hi team, Could you kindly advise the below inquires form customer ? 1. Why the charge time at CT 0.1uF in Fig 1 is longer than at CT 0.02uF ? It seems the number of CT get be smaller and smaller and charge time get be longer as well. 2. What is charge time ? - What should customer consider from Fig 1 ? - It looks different that charge time is switching frequency since switching frequency is provided by equation f = 1/CT(0.7RT + 3RD) Is the time until full charge of CT ? 3. Regarding fig 2 What can customer find from Fig 2 ? When customer configured RD = 100 ohm, how long will dead time take ? 4. Could you kindly provide the behavior if sync is used ? Customer would like to know the relation between internal clock and external clock. Thank you and best regards, Michiaki + +Hi Machiaki, 1./ It should be a writing mistake in figure 1, it is 0.1uf rather than 0.01uf. With the same RT, the larger CT, the longer charger time. 2./ Figure 1 is the charge time, not switching period, the switching period should be the sum of charging time and discharging time. The equation f = 1/CT(0.7RT + 3RD) can be used to approximately calculated the frequency. 3./ According figure 2, if CT is defined, then we can configure RD to get the desired dead time (discharging time). 4./ If synchronization is used, the sync signal will force to arrive the internal discharging threshold earlier. The PWM is allowed to run at the frequency set by RT, CT and RD until the sync pulse appears. Generally, the free frequency must be set to a lower frequency than the sync pulse, typically 15%. Regards, Teng + +Hi Teng, Could you kindly advise how we can see the figure 1? Thank you and best regards, Michiaki + +Hi Michiaki, The device uses an external resistor to set the charging current for the external capacitor, which determines the oscillator frequency.company recommends timing resistor values from 2 kΩ to 150 kΩ and timing capacitor values from 0.001 uF to 0.01 uF. See Figure 1 for component values for setting the charging time (oscillator frequency). And see Figure 2 for dead time resister value for setting the discharging time (dead time), and dead time resister value from 0 to 500 Ω. Because resistors are available in more precise increments, typically 1%, and capacitors are only available in 5% accuracy, it might be more practical to select the closest capacitor value first and then select the timing resistor value next according the figure 1 and figure 2. Regards, Teng + +Hi Teng, Could you kindly advise why the charge time is longer as CT is smaller ? Thank you and best regards, Michiaki + +Hi Michiaki, The charging time should be the larger, as the CT increases. There is a mistake in figure 1, please exchange the position of 0.01 uF and 0.1 uF. Regards, Teng + diff --git a/data/text/DLP3/898317 b/data/text/DLP3/898317 new file mode 100644 index 0000000000000000000000000000000000000000..10df0bc6e26d10757152f100ae890be0b518509c --- /dev/null +++ b/data/text/DLP3/898317 @@ -0,0 +1,24 @@ +IWR6843: Modify GUI sample code to adapt with UART crash + +Part Number: IWR6843 Sometimes when the IWR6843 sends data to PC via UART, it got crashed and GUI stops working. With the current GUI version, we must reset both GUI and IWR6843. But my customers may think that device has problem. I want to modify the GUI code to make it work normally without having to reset device, so my customers will believe that problem comes from UART, not from device. We only need to re-open GUI and enter COM port, then data continue transfer. Please tell me which part in python code of GUI can be modified to meet this requirement. + +Hi Hector, Please see the file gui_main.py. When the send cfg button is pressed, you will see that it does two things: Tells the parser object to send the configuration Starts a timer with duration frame period, which calls the parse function periodically. For your application needs, you will need to add a button that does #2 above. See the sendCfg() function in gui_main.py - essentially you have to have a button activated function that calls the following line: self.parseTimer.start(self.frameTime) self.frameTime is set when the configuration is loaded into the gui, you may need to set it to 50 as default (this is 50 ms). If you are getting an error message when the GUI crashes, can you send a picture? Regards, Justin + +Hi Justin, GUI only stopped frame numbers and target tracking when it crashed. I don't have any error message. I'll think of the way you mentioned and ask you more later. + +Hi Justin, I'm not sure what you mean. sendCfg() is made a button in setConfigLayout() as self.sendConfig.clicked.connect(self.sendCfg). Why do I need to make another button? Do you mean by setting self.frameTime = 50, even if GUI crashes, I don't need to reset device, only re-open GUI and can keep getting data? Just simple like that? Please enlighten me if my understanding is wrong. + +Hi Hector, Your initial problem is that the gui is crashing, but the device is not - correct? So if GUI crashes, you have to restart the gui. Currently, there is no option to start parsing the UART with sending a config to the device (which will usually crash the device, behavior is undefined). So my suggestion is to add an option in the gui to restart the UART parsing without sending a configuration. Regards, Justin + +Hi Justin, So the reason why I had to reset device even though it's still ok because current GUI version only can parse data after sending Cfg? If we skip it, there's no need to reset device anymore, right? But I think self.parseTimer.start() as you mentioned is only to set timing to parse data after we sent Cfg, not to skip sending Cfg after re-open GUI. Is there any other function in python code I need to notice? + +Hi Hector, When the timer ticks to 0, it automatically calls the parse thread, and the rest of the gui will do what its supposed to after that. So really the only function to worry about is starting the timer. Regards, Justin + +Hi Justin, 1. I made GUI work normally without resetting device after GUI crashes. But the fact is, the 1st time I power on the device and send Cfg, I see a boundary box simulating the space we want limit for tracking (room's size, I think). my new GUI can re-open and work well, but I don't see boundary box anymore. Please tell me which part to modify for boundary display after re-open GUI. I think it's in parseCfg(), please tell me more details for it. 2. I attach my video here. You can see there's no boundary after re-open GUI. Besides, another problem is: If I rebuild 3D people count in toolbox and flash program again, the device didn't work. Then, I modified toolbox code a little, now it can work but you can see in the video the tracking box flickering (target number switch between 0 & 1 continuously). This problem doesn't happen if I flash prebuilt bin file from TI, only happen when I rebuild toolbox code. Please see video below and tell me solution for GUI optimization and tracking box flickering problem. https://youtu.be/cn2H3XIp7dI + +Hi Justin, 1. I made GUI work normally without resetting device after GUI crashes. But the fact is, the 1st time I power on the device and send Cfg, I see a boundary box simulating the space we want limit for tracking (room's size, I think). my new GUI can re-open and work well, but I don't see boundary box anymore. Please tell me which part to modify for boundary display after re-open GUI. I think it's in parseCfg(), please tell me more details for it. 2. I attach my video here. You can see there's no boundary after re-open GUI. Besides, another problem is: If I rebuild 3D people count in toolbox and flash program again, the device didn't work. Then, I modified toolbox code a little, now it can work but you can see in the video the tracking box flickering (target number switch between 0 & 1 continuously). This problem doesn't happen if I flash prebuilt bin file from TI, only happen when I rebuild toolbox code. Weirdly, my manager used the same toolbox version and rebuilt code, ha can do tracking normally. But my PC can't track target, only see point cloud. He said maybe CCS , SDK or other software on my PC are not suitable. I installed all the same as his PC but still has weird status. Previously, I could track normally. But after I flashed another program of HVAC, I couldn't track 3D people count correctly as before. Please see video below and tell me solution for GUI optimization and tracking box flickering problem. Here're 2 versions of my code that does not track normally File 1. Tracking box flickering (file name 3D_4.2) 3D_4.2 toolbox.zip File 2. Tracking ok on my manager PC but only see point cloud without tracking box on my PC (file name 3D_4.2.1) 3D_4.2.1.zip Please tell me if I need to modify any environment settings on PC to get tracking normally as before. + +Hi Hector, For the issue of the boundary box not appearing, when you reopen the gui, just check the boundary box option "Enable Box" and make sure the right values are set in the menu. These are automatically set when the config is loaded, so if you are reloading the config you have to set it yourself. For the issue of the tracks disappearing - the gui is fairly dumb, it only shows exactly what the device tells it. With this is mind, it is possible that your PC is missing the occasional frame of data - since the gui doesn't get the frame info, it may not draw the track, leading to a flicker. However, it is also possible that somehow the wrong tracker got linked. Do you know how to check the linker settings in CCS? Please ensure that the gtrack library from the 3D People Counting lab is being linked in the linker settings. Regards, Justin + +Hi Justin, I checked linker library pathin CCS. It linked to toolbox->lab->3D count. It should be correct. But it can't get normal tracking as before. About Enable Box, is there any way to make box automatically enabled without having to click on that check-box? + diff --git a/data/text/DLP3/898319 b/data/text/DLP3/898319 new file mode 100644 index 0000000000000000000000000000000000000000..a3b4da50857a561e7824197065017432828c3e98 --- /dev/null +++ b/data/text/DLP3/898319 @@ -0,0 +1,10 @@ +BQ27220: Flags()[ITPOR] missing + +Part Number: BQ27220 Hi team, My customer now uses BQ27220 and they want to use Flags()[ITPOR] bit to flag if RAM configuration is reset to default configuration. But we can't find the address of this bit in Batterystatus(). So please help me find out where and how to read this bit? Thank you! Gary + +As far as I know, that bit doesn't exist. See the following thread. /support/power-management/f/196/p/765496/2839734?tisearch=e2e-sitesearch&keymatch=bq27220%2520ITPOR#2839734 Andy + +Hi Andy, If so, my customer now wants to know when the RAM is reset to default configuration as soon as possible(ITPOR function). Can you recommend some good solution on BQ27220? Many thanks! Gary + +Hi Gary, I have not seen a bit that can serve that purpose yet. How does the customer program their configurations to the gauge device? Andy + diff --git a/data/text/DLP3/898343 b/data/text/DLP3/898343 new file mode 100644 index 0000000000000000000000000000000000000000..b11a1c2fa778645819f08cbb510f15c32e9b8c0b --- /dev/null +++ b/data/text/DLP3/898343 @@ -0,0 +1,8 @@ +TPS54821: Value of OVP + +Part Number: TPS54821 Hi Team Our customer want to know the value of OVP I can't find the value of OVP on the datasheet. The spec of circuit as follow Vin = 12V Vout = 3.3V Iout = 4.83A What is the value of OVP, I would like to suggest to the guests. Please explain how to know the value of OVP or Can I have information for reference? Thank you! + +Hi, we will check and give you feedback these two days. Yuchang + +Jimmy, Typically it is 106%*Vref. Yuchang + diff --git a/data/text/DLP3/898344 b/data/text/DLP3/898344 new file mode 100644 index 0000000000000000000000000000000000000000..b0cb96dd307c2a1012cd194bfa2d5b153fd8d481 --- /dev/null +++ b/data/text/DLP3/898344 @@ -0,0 +1,18 @@ +CCS/IWR6843ISK-ODS: mmwave studio LUA shell RSTD.NetStart issue + +Part Number: IWR6843ISK-ODS Tool/software: Code Composer Studio Hi When I try to use RSTD.NetStart instruction in LUA shell. It returns a message as following: I also modify the mmWaveStudio.exe.config line 5 from name="RTTT.Properties.Settings to name="RSTD.Properties.Settings, but the error still exists. How should I do for this issue? Ernie + +Hello, Can you please try the latest version of Studio 2.1? I have tested it and RSTD.NetStart() is called in the Startup script automatically. You do not need to enter it in the LUA shell. In the output window you can see: RstdNet: Port 2777: Listening.. as the response after launch mmWave Studio. Amanda + +Hi But the version of Radar board is ES1.0. The Studio 1.0 seems that only support ES2.0? Ernie + +Ernie, I was able to use v 2.0 with modification to the .config file. As specified in this thread: /.../2627526 I've attached the file I used.6747.mmWaveStudio.exe.config Can you replace it and see if it works for you. You should see the RstdNet: Port 2777: Listening.. response in the output panel after giving the command in the Lua Shell. Please provide the message shown in the output panel if you are still not able to get it to work. AManda + +Hi Amanda I have replaced the mmWaveStudio configure file on my PC. However, the mmWave Studio can't be used after replacing the configure file. The attachment is my configure file. The difference between our configure is from line 71. 0121.mmWaveStudio.exe.config Ernie + +Hello Ernie, Can you try uninstall and then reinstall mmWave Studio and then replacing the file or making the changes as I have in my attached file? Make sure you manually delete the RSTD folder as a whole present in the C:\Users\\AppData\Roaming location before you reinstall. Amanda + +Hi I try to uninstall and then reinstall mmWave Studio and then replacing the file or making the changes as you mention above, and I also try the issue as follows: /support/sensors/f/1023/t/671275?tisearch=e2e-quicksearch&keymatch=awr1243boost:%20Radar%20studio%20automation But the error still exists, the return is the same as >RSTD.NetStart ans=Lua511.LuaCSFunction Does it mean the function has a problem? or the port 2777 has been used so I can't use it? Ernie + +You need to be invoking it as a function RSTD.NetStart(); you're using only RSTD.NetStart + diff --git a/data/text/DLP3/898351 b/data/text/DLP3/898351 new file mode 100644 index 0000000000000000000000000000000000000000..f53197b0207d475566c03019908c6dbcd67a85fa --- /dev/null +++ b/data/text/DLP3/898351 @@ -0,0 +1,8 @@ +TPS61178: Spike on SW node + +Part Number: TPS61178 Hi, My customer see very short (~10ns) spikes exceeding Abs max on the SW pin with about 3V. I would like to share and discuss their material offline. Please reach out to me via email. Thanks. B.r M.A.M + +Hi M.A.M Sorry that I can't find the email informantion. Could you send to me? Thank you! + +Thanks. I will contact you. B.r M.A.M + diff --git a/data/text/DLP3/898364 b/data/text/DLP3/898364 new file mode 100644 index 0000000000000000000000000000000000000000..74b83f20d3d1cabe3541e67af6c8fa23323bfdb3 --- /dev/null +++ b/data/text/DLP3/898364 @@ -0,0 +1,14 @@ +UC3825: Switching frequency + +Part Number: UC3825 Hi team, Could you provide the equation for frequency configuration with RT, CT ? And are there any application report to know more detail to design circuit with UC3825 ? Thank you and best regards, Michiaki + +Hi Michiaki, I didn't find a equation for the frequency of UC3825, you can design the frequency according the figure of "Timing Resistance vs Frequency " in page 6 of datasheet. It is more accurate than the equation. I only found one UC3825 application note for your reference, /lit/an/slua053/slua053.pdf but I think it is more like a power note. If you want to verify the calculation and design, it is a good solution to use a simulation module which is available online. /product/UC3825/toolssoftware Regards, Teng + +Hi Teng, Does customer need cut and try on TINA and design without equation ? Thank you and best regards, Michiaki + +Hi Michiaki, Yes, customer can select the RT and CT according the figure of "Timing Resistance vs Frequency " in page 6 of datasheet. And I recommend to use a simulation to rectify the result if they want. Regards, Teng + +Hi Teng, Could you kindly advise what difference is between UC3825 and UC3825A/B ? We can find the more detail in the datasheet of UC3825A/B. Should we recommend UC3825A/B instead of UC3825? Thank you and best regards, Michiaki + +Hi Michiaki, In most applications, the UC3825A/B devices are enhanced drop-in replacements for UC3825a/B high speed PWMs. We can recommend UC3825A/B to customer instead of UC3825. The differences can be easily found in the attached document. And also datasheet. /lit/an/slua125/slua125.pdf Regards, Teng + diff --git a/data/text/DLP3/898379 b/data/text/DLP3/898379 new file mode 100644 index 0000000000000000000000000000000000000000..7348f153537f2356eceb589d7be7ee39dceff71e --- /dev/null +++ b/data/text/DLP3/898379 @@ -0,0 +1,10 @@ +TPS55330: TPS55330 work abnormal, does not match the formula + +Part Number: TPS55330 Hi I got a problem Calculate according to the formula Input 12V, require output 16V, circuit as picture But the output is 19V, no matter if R175 is 120K or 100K Where is the problem? Thank you 1.229V x (R175/R177 +1) + +Hi Jeff, Can you share the layout? Have you tried applying a load at output? Will the output voltage sitill be 19V? + +In fact, I made a mistake. My original design is wrong. So change to external parts for experiment. Layout as picture. Thanks + +Hi Jeff, I didn't find the detailed datasheet for inductor MSPI0530-1R0M, please make sure the inductor has enough saturation current spec. The shared layout picture doesn't show me the position of output capacitors. Please make a note on above picture. Below is the recommended layout in datasheet. The output capacitors are suggested to put close to cathode of Schottky diode and IC PGND pins so that the PCB parasitic inductance is the minimum. Meanwhile, the power traces should be wide enough. Lastly, check the FB pin voltage to AGND with a DMM. It should be 1.244V. + diff --git a/data/text/DLP3/898382 b/data/text/DLP3/898382 new file mode 100644 index 0000000000000000000000000000000000000000..3a36bb2e384296ad41349315f76b272153a954ff --- /dev/null +++ b/data/text/DLP3/898382 @@ -0,0 +1,619 @@ +CCS/IWR6843: SPI test compile error + +Part Number: IWR6843 Tool/software: Code Composer Studio I'm trying to test SPI function on IWR6843. After finished pinmux settings, I modified the mss_main.c code of 3D people counting and added the SPI test code based on sample code in the path: C:\ti\mmwave_sdk_03_03_00_03\packages\ti\drivers\spi\test\xwr68xx I already done SPI_init(), SPI_Params_init(¶ms); But there were many errors occurred. Please explain (something like 3D_people_count_68xx_mss.xe4f not built, other errors and help me solve it. Here's the code I used void Test_spiSlaveWithPC(void) +{ + SPI_Params params; + SPI_Handle handle; + spiTestMsg* pTestMsg; + uint16_t retry=0; + uint16_t msgSeqNo = 0; + uint32_t loop; + volatile uint32_t cycles; + float throughput; + uint32_t totalLoop; + + /* Setup the default SPI Parameters */ + SPI_Params_init(¶ms); + + params.mode = SPI_SLAVE; + params.frameFormat = SPI_POL0_PHA1; + params.pinMode = SPI_PINMODE_4PIN_CS; + params.shiftFormat = SPI_MSB_FIRST; + + /* When communicating with PC through FTDI, it is difficult to toggle CS for every two bytes, hence set csHold to 1. + In this mode, the highest working SPI clock is 2MHz */ + params.csHold = 1; + + /* Enable DMA and set DMA channels */ + params.dmaEnable = 1; + params.dmaHandle = gDmaHandle; + params.u.slaveParams.dmaCfg.txDmaChanNum =1U; + params.u.slaveParams.dmaCfg.rxDmaChanNum =0U; + + handle = SPI_open(0, ¶ms); + if (handle == NULL) + { + System_printf("Error: Unable to open the SPI Instance\n"); + MCPI_setFeatureTestResult ("SPI Slave with PC ", MCPI_TestResult_FAIL); + return; + } + + memset((void *)txBuf, 0x55, SPI_TEST_MSGLEN); + + System_printf("Debug: SPI Instance %p has been reopened in SLAVE mode successfully for 4pin FTDI testing\n", handle); + gXWR1xxxSlaveReady = true; + + while(1) + { + Test_spiRead(handle, SPI_TEST_MSGLEN, (void *)rxBuf, 0U); + + pTestMsg = (spiTestMsg*)&rxBuf[0]; + if(pTestMsg->magicNumber != SWAP_BYTES(MAGIC_NUMBER)) + { + System_printf("incorrect magic Number: 0x%x 0x%x\n", pTestMsg->magicNumber, SWAP_BYTES(MAGIC_NUMBER)); + continue; + } + + if((pTestMsg->dataLen != SWAP_BYTES(SPI_TEST_SYNC_MSGLEN)) || (pTestMsg->seqNo != 0)) + { + System_printf("incorrect datalen(%d), seqNo= %d\n", pTestMsg->dataLen, pTestMsg->seqNo); + continue; + } + + /* Got the correct sync message, send back the message */ + msgSeqNo = SWAP_BYTES(pTestMsg->seqNo); + pTestMsg->seqNo = SWAP_BYTES(msgSeqNo+1); + + /* Read two byte , send it back */ + Test_spiWrite(handle, SPI_TEST_MSGLEN, (void *)pTestMsg, 0U); + + break; + } + + /* Save the Sync message for re-sent */ + memcpy((void *)txBuf, (void *)pTestMsg, SPI_TEST_MSGLEN); + + /* Got the Sync message, waiting for next test message */ + msgSeqNo += 2; + + /* Test loop count from first 16 bits of Sync message */ + loop = pTestMsg->data[0] * 256 + pTestMsg->data[1] ; + System_printf("Test loop=%d, bufferLen=%d\n", loop, SPI_TEST_MSGLEN); + totalLoop = loop; + + while(loop) + { + /* Read two byte , send it back */ + Test_spiRead(handle, SPI_TEST_MSGLEN, (void *)rxBuf, 0U); + + if(pTestMsg->magicNumber != SWAP_BYTES(MAGIC_NUMBER)) + { + continue; + } + + if((pTestMsg->seqNo == 0) && (pTestMsg->dataLen == SWAP_BYTES(SPI_TEST_SYNC_MSGLEN))) + { + /* Re-sent the Sync message */ + Test_spiWrite(handle, SPI_TEST_MSGLEN, (void *)txBuf, 0U); + continue; + } + + /* Receive Last message */ + if(pTestMsg->seqNo == SWAP_BYTES(msgSeqNo - 2)) + { + Test_spiWrite(handle, SPI_TEST_MSGLEN, (void *)txBuf, 0U); + retry++; + + continue; + } + + /* Incorrect seqNo, drop the message */ + if(pTestMsg->seqNo != SWAP_BYTES(msgSeqNo)) + { + retry++; + continue; + } + + if(loop == totalLoop) + { + // Start the counter after receive the first message + Test_benchmarkStart(0); + } + + retry = 0; + loop--; + + /* Receive the message with correct header, increment the seq Number */ + pTestMsg->seqNo = SWAP_BYTES(SWAP_BYTES(pTestMsg->seqNo) + 1); + + Test_spiWrite(handle, SPI_TEST_MSGLEN, (void *)pTestMsg, 0U); + + msgSeqNo += 2; + } + // Stop the counter + cycles = Test_benchmarkStop(0); + + // Calculate and print the count + throughput = 8.0 * SPI_TEST_MSGLEN * totalLoop * VBUSP_FREQ / cycles; + System_printf("Debug: throughput overall = %.2f Mbps\n", throughput); + + MCPI_setFeatureTestResult ("SPI Slave with PC ", MCPI_TestResult_PASS); +} + +/** + * @b Description + * @n + * System Initialization Task which initializes the various + * components in the system. + * + * @retval + * Not Applicable. + */ +static void Pcount3DDemo_initTask(UArg arg0, UArg arg1) +{ + int32_t errCode; + MMWave_InitCfg initCfg; + UART_Params uartParams; + Task_Params taskParams; + Semaphore_Params semParams; + DPM_InitCfg dpmInitCfg; + DMA_Params dmaParams; + DMA_Handle dmaHandle; + SPI_Params params; + SPI_Handle handle; + SOC_Handle socHandle; + spiTestMsg* pTestMsg; + int32_t retVal = 0; + + /* Get SOC driver Handle */ + socHandle = (SOC_Handle) arg0; + + DPC_ObjectDetectionRangeHWA_InitParams objDetInitParams; +// int32_t i; + + /* Debug Message: */ + System_printf("Debug: Launched the Initialization Task\n"); + + /* Initialize MCPI logger framework */ + MCPI_Initialize (); + + /***************************************************************************** + * Initialize the mmWave SDK components: + *****************************************************************************/ + /* Initialize the UART */ + UART_init(); + + /* Initialize the DMA for UART */ + DMA_init (); + + /* Open DMA driver instance 0 for SPI test */ + gDmaHandle = DMA_open(0, &dmaParams, &retVal); + + if(gDmaHandle == NULL) + { + printf("Open DMA driver failed with error=%d\n", retVal); + return; + } + + /* Initialize the SPI */ + SPI_init(); + /* Setup the default SPI Parameters */ + SPI_Params_init(¶ms); + + /************************************************************************** + * Test: One instace API test - SPIA + **************************************************************************/ + Test_spiAPI_oneInstance(0); + System_printf("Debug: Finished API Test for SPIA!\n"); + + /************************************************************************** + * Test: One instace API test - SPIB + **************************************************************************/ + Test_spiAPI_oneInstance(1); + System_printf("Debug: Finished API Test for SPIB!\n"); + + /************************************************************************** + * Test: two instaces API test - SPIA & SPIB + **************************************************************************/ + Test_spiAPI_twoInstance(); + System_printf("Debug: Finished API Test for SPIA + SPIB!\n"); + + if(gXWR1xxxSlaveWithFTDITest) + { + /* Enable output control for SPIA in 4Pin mode */ + if(SOC_SPIOutputCtrl(socHandle, 0U, 0U, &errCode) < 0) + { + /* Debug Message: */ + System_printf ("Debug: SOC_SPIOutputCtrl failed with Error [%d]\n", errCode); + return; + } + + Test_spiSlaveWithPC(); + } + + /* Open the DMA Instance */ + DMA_Params_init(&dmaParams); + dmaHandle = DMA_open(0, &dmaParams, &errCode); + if (dmaHandle == NULL) + { + printf ("Error: Unable to open the DMA Instance [Error code %d]\n", errCode); + return; + } + + /* Initialize the GPIO */ + GPIO_init(); + + /* Initialize the Mailbox */ + Mailbox_init(MAILBOX_TYPE_MSS); + + /* Platform specific configuration */ + Pcount3DDemo_platformInit(&gMmwMssMCB.cfg.platformCfg); + + /***************************************************************************** + * Open the mmWave SDK components: + *****************************************************************************/ + /* Setup the default UART Parameters */ + UART_Params_init(&uartParams); + uartParams.clockFrequency = gMmwMssMCB.cfg.platformCfg.sysClockFrequency; + uartParams.baudRate = gMmwMssMCB.cfg.platformCfg.commandBaudRate; + uartParams.isPinMuxDone = 1; + + /* Open the UART Instance */ + gMmwMssMCB.commandUartHandle = UART_open(0, &uartParams); + if (gMmwMssMCB.commandUartHandle == NULL) + { + Pcount3DDemo_debugAssert (0); + return; + } + + /* Setup the default UART Parameters */ + UART_Params_init(&uartParams); + uartParams.writeDataMode = UART_DATA_BINARY; + uartParams.readDataMode = UART_DATA_BINARY; + uartParams.clockFrequency = gMmwMssMCB.cfg.platformCfg.sysClockFrequency; + uartParams.baudRate = gMmwMssMCB.cfg.platformCfg.loggingBaudRate; + uartParams.isPinMuxDone = 1U; + + uartParams.dmaHandle = dmaHandle; + uartParams.txDMAChannel = UART_DMA_TX_CHANNEL; + uartParams.rxDMAChannel = UART_DMA_RX_CHANNEL; + + /* Open the Logging UART Instance: */ + gMmwMssMCB.loggingUartHandle = UART_open(1, &uartParams); + if (gMmwMssMCB.loggingUartHandle == NULL) + { + System_printf("Error: Unable to open the Logging UART Instance\n"); + Pcount3DDemo_debugAssert (0); + return; + } + + /* Create binary semaphores which is used to signal DPM_start/DPM_stop/DPM_ioctl is done + * to the sensor management task. The signalling (Semaphore_post) will be done + * from DPM registered report function (which will execute in the DPM execute task context). */ + Semaphore_Params_init(&semParams); + semParams.mode = Semaphore_Mode_BINARY; + gMmwMssMCB.DPMstartSemHandle = Semaphore_create(0, &semParams, NULL); + gMmwMssMCB.DPMstopSemHandle = Semaphore_create(0, &semParams, NULL); + gMmwMssMCB.DPMioctlSemHandle = Semaphore_create(0, &semParams, NULL); + + /* Open EDMA driver */ + Pcount3DDemo_edmaInit(&gMmwMssMCB.dataPathObj, DPC_OBJDET_R4F_EDMA_INSTANCE); + + /* Use EDMA instance 0 on MSS */ + Pcount3DDemo_edmaOpen(&gMmwMssMCB.dataPathObj, DPC_OBJDET_R4F_EDMA_INSTANCE); + + Pcount3DDemo_hwaInit(&gMmwMssMCB.dataPathObj); + Pcount3DDemo_hwaOpen(&gMmwMssMCB.dataPathObj, gMmwMssMCB.socHandle); + + /***************************************************************************** + * mmWave: Initialization of the high level module + *****************************************************************************/ + + /* Initialize the mmWave control init configuration */ + memset ((void*)&initCfg, 0 , sizeof(MMWave_InitCfg)); + + /* Populate the init configuration: */ + initCfg.domain = MMWave_Domain_MSS; + initCfg.socHandle = gMmwMssMCB.socHandle; + initCfg.eventFxn = Pcount3DDemo_eventCallbackFxn; + initCfg.linkCRCCfg.useCRCDriver = 1U; + initCfg.linkCRCCfg.crcChannel = CRC_Channel_CH1; + initCfg.cfgMode = MMWave_ConfigurationMode_FULL; + initCfg.executionMode = MMWave_ExecutionMode_ISOLATION; + + /* Initialize and setup the mmWave Control module */ + gMmwMssMCB.ctrlHandle = MMWave_init (&initCfg, &errCode); + if (gMmwMssMCB.ctrlHandle == NULL) + { + /* Error: Unable to initialize the mmWave control module */ + System_printf ("Error: mmWave Control Initialization failed [Error code %d]\n", errCode); + Pcount3DDemo_debugAssert (0); + return; + } + System_printf ("Debug: mmWave Control Initialization was successful\n"); + + /* Synchronization: This will synchronize the execution of the control module + * between the domains. This is a prerequiste and always needs to be invoked. */ + if (MMWave_sync (gMmwMssMCB.ctrlHandle, &errCode) < 0) + { + /* Error: Unable to synchronize the mmWave control module */ + System_printf ("Error: mmWave Control Synchronization failed [Error code %d]\n", errCode); + Pcount3DDemo_debugAssert (0); + return; + } + System_printf ("Debug: mmWave Control Synchronization was successful\n"); + + // Create a task to do SPI +/* Task_Params_init(&taskParams); + taskParams.stackSize = 6*1024; + taskParams.arg0 = (UArg)socHandle; + Task_create(Test_initTask, &taskParams, NULL);*/ + + /***************************************************************************** + * Launch the mmWave control execution task + * - This should have a higher priroity than any other task which uses the + * mmWave control API + *****************************************************************************/ + Task_Params_init(&taskParams); + taskParams.priority = MMWDEMO_MMWAVE_CTRL_TASK_PRIORITY; + taskParams.stackSize = 2800; + gMmwMssMCB.taskHandles.mmwaveCtrl = Task_create(Pcount3DDemo_mmWaveCtrlTask, &taskParams, NULL); + + + /***************************************************************************** + * Create a task to do DMA based UART data transfer + *****************************************************************************/ + /* Create a binary semaphore for application task to pend */ + Semaphore_Params_init(&semParams); + semParams.mode = Semaphore_Mode_BINARY; + gMmwMssMCB.uartTxSemHandle = Semaphore_create(0, &semParams, NULL); + + Task_Params_init(&taskParams); + taskParams.priority = MMWDEMO_UARTTX_TASK_PRIORITY; + taskParams.stackSize = 800; + Task_create(MmwDemo_uartTxTask, &taskParams, NULL); + + /***************************************************************************** + * Initialization of the DPM Module: + *****************************************************************************/ + memset ((void *)&objDetInitParams, 0, sizeof(DPC_ObjectDetectionRangeHWA_InitParams)); + + /* Note this must be after Pcount3DDemo_dataPathOpen() above which opens the hwa */ + objDetInitParams.L3ramCfg.addr = (void *)&gMmwL3[0]; + objDetInitParams.L3ramCfg.size = sizeof(gMmwL3); + objDetInitParams.CoreLocalRamCfg.addr = &gDPCTCM[0]; + objDetInitParams.CoreLocalRamCfg.size = sizeof(gDPCTCM); + objDetInitParams.edmaHandle = gMmwMssMCB.dataPathObj.edmaHandle; + objDetInitParams.hwaHandle = gMmwMssMCB.dataPathObj.hwaHandle; + + /* DPC Call-back config */ + objDetInitParams.processCallBackFxn.processInterFrameBeginCallBackFxn = + Pcount3DDemo_DPC_ObjectDetection_processInterFrameCallBackFxn; + + objDetInitParams.processCallBackFxn.processFrameBeginCallBackFxn = + Pcount3DDemo_DPC_ObjectDetection_processFrameBeginCallBackFxn; + + /* Setup the configuration: */ + memset ((void *)&dpmInitCfg, 0, sizeof(DPM_InitCfg)); + dpmInitCfg.socHandle = gMmwMssMCB.socHandle; + dpmInitCfg.ptrProcChainCfg = &gDPC_ObjDetRangeHWACfg;; + dpmInitCfg.instanceId = DPC_OBJDET_R4F_INSTANCEID; + dpmInitCfg.domain = DPM_Domain_DISTRIBUTED; + dpmInitCfg.reportFxn = Pcount3DDemo_DPC_ObjectDetection_reportFxn; + dpmInitCfg.arg = &objDetInitParams; + dpmInitCfg.argSize = sizeof(DPC_ObjectDetectionRangeHWA_InitParams); + + /* Initialize the DPM Module: */ + gMmwMssMCB.objDetDpmHandle = DPM_init (&dpmInitCfg, &errCode); + if (gMmwMssMCB.objDetDpmHandle == NULL) + { + System_printf ("Error: Unable to initialize the DPM Module [Error: %d]\n", errCode); + Pcount3DDemo_debugAssert (0); + return; + } + + /* Synchronization: This will synchronize the execution of the datapath module + * between the domains. This is a prerequiste and always needs to be invoked. */ + while (1) + { + int32_t syncStatus; + + /* Get the synchronization status: */ + syncStatus = DPM_synch (gMmwMssMCB.objDetDpmHandle, &errCode); + if (syncStatus < 0) + { + /* Error: Unable to synchronize the framework */ + System_printf ("Error: DPM Synchronization failed [Error code %d]\n", errCode); + Pcount3DDemo_debugAssert (0); + return; + } + if (syncStatus == 1) + { + /* Synchronization acheived: */ + break; + } + /* Sleep and poll again: */ + Task_sleep(1); + } + +#ifdef TRACKERPROC_EN + /***************************************************************************** + * Create a task to run tracker DPU at lower priority than HWA DPC + *****************************************************************************/ + /* Create a binary semaphore for application task to pend */ + Semaphore_Params_init(&semParams); + semParams.mode = Semaphore_Mode_BINARY; + gMmwMssMCB.trackerDPUSemHandle = Semaphore_create(0, &semParams, NULL); + + Task_Params_init(&taskParams); + taskParams.priority = MMWDEMO_TRACKERDPU_TASK_PRIORITY; + taskParams.stackSize = 7*1024; + Task_create(MmwDemo_trackerDPUTask, &taskParams, NULL); +#endif + + /* Launch the DPM Task */ + Task_Params_init(&taskParams); + taskParams.priority = MMWDEMO_DPC_OBJDET_DPM_TASK_PRIORITY; + taskParams.stackSize = 7*1024; + gMmwMssMCB.taskHandles.objDetDpmTask = Task_create(mmwDemo_mssDPMTask, &taskParams, NULL); + + /***************************************************************************** + * Initialize the Profiler + *****************************************************************************/ + Cycleprofiler_init(); + + /***************************************************************************** + * Initialize the CLI Module: + *****************************************************************************/ + Pcount3DDemo_CLIInit(MMWDEMO_CLI_TASK_PRIORITY); + + return; +} + +int main(void) +{ + /*======================================= + * Setup the PINMUX to bring out the MibSpiA + *=======================================*/ + /* NOTE: Please change the following pin configuration according + to EVM used for the test */ + + /* SPIA_MOSI */ + Pinmux_Set_OverrideCtrl(SOC_XWR68XX_PIND13_PADAD, PINMUX_OUTEN_RETAIN_HW_CTRL, PINMUX_INPEN_RETAIN_HW_CTRL); + Pinmux_Set_FuncSel(SOC_XWR68XX_PIND13_PADAD, SOC_XWR68XX_PIND13_PADAD_SPIA_MOSI); + + /* SPIA_MISO */ + Pinmux_Set_OverrideCtrl(SOC_XWR68XX_PINE14_PADAE, PINMUX_OUTEN_RETAIN_HW_CTRL, PINMUX_INPEN_RETAIN_HW_CTRL); + Pinmux_Set_FuncSel(SOC_XWR68XX_PINE14_PADAE, SOC_XWR68XX_PINE14_PADAE_SPIA_MISO); + + /* SPIA_CLK */ + Pinmux_Set_OverrideCtrl(SOC_XWR68XX_PINE13_PADAF, PINMUX_OUTEN_RETAIN_HW_CTRL, PINMUX_INPEN_RETAIN_HW_CTRL); + Pinmux_Set_FuncSel(SOC_XWR68XX_PINE13_PADAF, SOC_XWR68XX_PINE13_PADAF_SPIA_CLK); + + /* SPIA_CS */ + Pinmux_Set_OverrideCtrl(SOC_XWR68XX_PINE15_PADAG, PINMUX_OUTEN_RETAIN_HW_CTRL, PINMUX_INPEN_RETAIN_HW_CTRL); + Pinmux_Set_FuncSel(SOC_XWR68XX_PINE15_PADAG, SOC_XWR68XX_PINE15_PADAG_SPIA_CSN); + + /* SPI_HOST_INTR - not used, reference code */ + Pinmux_Set_OverrideCtrl(SOC_XWR68XX_PINP13_PADAA, PINMUX_OUTEN_RETAIN_HW_CTRL, PINMUX_INPEN_RETAIN_HW_CTRL); + Pinmux_Set_FuncSel(SOC_XWR68XX_PINP13_PADAA, SOC_XWR68XX_PINP13_PADAA_SPI_HOST_INTR); + + /*======================================= + * Setup the PINMUX to bring out the MibSpiB + *=======================================*/ + /* NOTE: Please change the following pin configuration according + to EVM used for the test */ + + /* Setup the PINMUX to bring out the MibSpiB */ + Pinmux_Set_OverrideCtrl(SOC_XWR68XX_PINF13_PADAH, PINMUX_OUTEN_RETAIN_HW_CTRL, PINMUX_INPEN_RETAIN_HW_CTRL); + Pinmux_Set_FuncSel(SOC_XWR68XX_PINF13_PADAH, SOC_XWR68XX_PINF13_PADAH_SPIB_MOSI); + + Pinmux_Set_OverrideCtrl(SOC_XWR68XX_PING14_PADAI, PINMUX_OUTEN_RETAIN_HW_CTRL, PINMUX_INPEN_RETAIN_HW_CTRL); + Pinmux_Set_FuncSel(SOC_XWR68XX_PING14_PADAI, SOC_XWR68XX_PING14_PADAI_SPIB_MISO); + + Pinmux_Set_OverrideCtrl(SOC_XWR68XX_PINF14_PADAJ, PINMUX_OUTEN_RETAIN_HW_CTRL, PINMUX_INPEN_RETAIN_HW_CTRL); + Pinmux_Set_FuncSel(SOC_XWR68XX_PINF14_PADAJ, SOC_XWR68XX_PINF14_PADAJ_SPIB_CLK); + + Pinmux_Set_OverrideCtrl(SOC_XWR68XX_PINH14_PADAK, PINMUX_OUTEN_RETAIN_HW_CTRL, PINMUX_INPEN_RETAIN_HW_CTRL); + Pinmux_Set_FuncSel(SOC_XWR68XX_PINH14_PADAK, SOC_XWR68XX_PINH14_PADAK_SPIB_CSN); + + + /* SPIB signals are connected to PMIC and XDS110 , unless the connection is removed on XWR16 + EVM, SPI signals can not be enabled as output. */ +#if 0 + /* Enable output control for SPIB */ + if(SOC_SPIOutputCtrl(socHandle, 1U, 1U, &errCode) < 0) + { + /* Debug Message: */ + System_printf ("Debug: SOC_SPIOutputCtrl failed with Error [%d]\n", errCode); + goto Exit; + } +#endif + + /* SPIA DMA and interrupt signals are muxed with other IPs in the SOC. + * Map them to SPIA. + */ + if (SOC_selectDMARequestMapping(socHandle, SOC_MODULE_SPIA, &errCode) < 0) + { + /* Debug Message: */ + System_printf ("Debug: SOC_selectDMARequestMapping (SPIA) failed with Error [%d]\n", errCode); + goto Exit; + } + if (SOC_selectInterruptRequestMapping(socHandle, SOC_MODULE_SPIA, &errCode) < 0) + { + /* Debug Message: */ + System_printf ("Debug: SOC_selectInterruptRequestMapping (SPIA) failed with Error [%d]\n", errCode); + goto Exit; + } + + /* Debug Message: */ + System_printf ("**********************************************\n"); + System_printf ("Debug: Launching the MMW Demo on MSS\n"); + System_printf ("**********************************************\n"); + + /* Initialize the Task Parameters. */ + Task_Params_init(&taskParams); + gMmwMssMCB.taskHandles.initTask = Task_create(Pcount3DDemo_initTask, &taskParams, NULL); + + /* Start BIOS */ + BIOS_start(); +Exit: + return 0; +} + +Hi Hector, Your errors are all unresolved symbols. This means the linker cannot find a compiled version of the functions you are trying to use. For example, one of your errors is "Unresolved Symbol: SPI_init()" - this means that the SPI library isn't properly included or linked. Please check the following: SPI and other new libraries are included in the relevant files SPI and other new libraries have a path in linker properties. Right click on the CCS project Select Properties at the bottom Select linker on the left Ensure there is a path in the linker setting to spi lib Regards, Justin + +Hi Justin, I added spi lib path to the project but compile still got the same error. Please show me how to solve it with illustration photo. + +Hi Justin, I also tried another method to add library by clicking to mss project ->Properties->Add files. Then I chose libspi_xwr68xx.aer4f in the path C:\ti\mmwave_sdk_03_03_00_03\packages\ti\drivers\spi\lib. But it still showed #10010 null: errors encountered during linking; "3D_people_count_68xx_mss.xer4f" not built 3D_people_count_68xx_mss C/C++ Problem null: unresolved symbols remain 3D_people_count_68xx_mss C/C++ Problem Import a library should be easy. I don't know why it failed. Here's the message when I tried to add lib file to project + +Hi Justin, I got less compiling error by adding xwr68xx_spi_mss.xer4f in the path C:\ti\mmwave_sdk_03_03_00_03\packages\ti\drivers\spi\test\xwr68xx to the project. Previously, I got 13 compile errors. After added xwr68xx_spi_mss.xer4f, now I only see 4 errors. Not sure whether this is better or not. But even if I don't use SPI function and remove all SPI commands, I still have these 4 errors after adding xwr68xx_spi_mss.xer4f to my project. If I don't add it, I only got compile error when I use SPI commands. How to solve it? I expect I can use SPI/I2C within this week, but I got stuck at library linking even though it seems to be easy. 1. Here's the error after I added xwr68xx_spi_mss.xer4f error: "could not be statically or dynamically linked null: file "C:/ti/mmwave_sdk_03_03_00_03/packages/ti/drivers/spi/test/xwr68xx/xwr68xx_spi_mss.xer4f" could not be statically or dynamically linked 3D_people_count_68xx_mss C/C++ Problem 2. Here's the error without xwr68xx_spi_mss.xer4f, I only added libspi_xwr68xx.aer4f in the path C:\ti\mmwave_sdk_03_03_00_03\packages\ti\drivers\spi\lib + +Hi Hector, You are linking the test library, instead you need to link the functional library. It is at: C:\ti\mmwave_sdk_03_03_00_03\packages\ti\drivers\spi\lib You can read mmWave SDK module documentation here: C:\ti\mmwave_sdk_03_03_00_03\docs\mmwave_sdk_module_documentation.html - if you go through the SPI documentation, you can see all external functions, which are the ones you should be using. Do not use the "Test" functions unless you are specifically trying to test the functionality of the module. Regards, Justin + +Hi Justin, 1. I modified my code, there's no compile error now. But I'm not sure how to test SPI function with UART GUI. As my understanding, we must connect PC to FTDI port on MMWAVEICBOOST in order to use SPI, right? If it's right, do I need to change S1 switch as below to use FTDI? The problem is: after I switched as above and connect PC to FTDI port, I don't see any port number on PC Device Manager to connect device to GUI even though I installed FTDI driver on Windows. How to connect? 2. I see in test_common.c in the path C:\ti\mmwave_sdk_03_03_00_03\packages\ti\drivers\spi\test\common has a function MCPI_setFeatureTestResult ((const char *)&testCase[0], MCPI_TestResult_PASS); I think it's to test whether SPI pass or not. But I can't find where its declaration located. Please tell me more about MCPI_setFeatureTestResult if it's really used to test SPI. 3. How can we send data from IWR6843 to MMWAVEICBOOST via SPI, then send to PC via UART and display on GUI? Below is some basic SPI function in my code, but I don't know how to combine it with UART data transfer to check whether SPI works well and display tracking on GUI correctly. static int32_t Test_spiReadWrite(const SPI_Handle handle, uint32_t dataLen, void* inBuffer, void* outBuffer, uint8_t slaveIndex) +{ + SPI_Transaction transaction; + + /* Configure Data Transfer */ + transaction.count = dataLen; + transaction.txBuf = outBuffer; + transaction.rxBuf = inBuffer; + transaction.slaveIndex = slaveIndex; + + /* Start Data Transfer */ + if (SPI_transfer(handle, &transaction) != true) + { + return -1; + } + return 0; +} + +void MmwDemo_mssInitTask(UArg arg0, UArg arg1) +{ +// UART function + + UART_init(); +} + +int main(void) +{ + //handle = SPI_open(someSPI_configIndexValue, ¶ms); + handle = SPI_open(0, ¶ms); + if (!handle) { + System_printf("SPI did not open"); + } + + /* Initialize the Task Parameters. */ + Task_Params_init(&taskParams); + taskParams.priority = 3; + taskParams.stackSize = 4*1024; + Task_create(MmwDemo_mssInitTask, &taskParams, NULL); +} + +Hi Hector, The FTDI port on the ICBOOST is only for mmWave studio direct control. We don't provide a driver for SPI to windows PC interface. To use the SPI connection, you will need to set the device in 40 Pin BP/LP mode, then connect some other device (like a beagle bone raspberry pi) to SPI pins. Regarding test code - these are unit tests that can be used to ensure the SPI driver is functioning correctly. Unit test documentation is here: /docs/mmwave_sdk_unit_test_procedure.pdf You should not be using any of the test functions in your application. Regards, Justin + +Hi Justin, I checked mmwave_sdk_unit_test_procedure.pdf as you said. It mentions we can test SPI on PC via FTDI port by setting gXWR1xxxSlaveWithFTDITest = 1. But I'm still unclear how to check whether SPI function works well in this case. If I write SPI transfer function correctly, and connect IWR6843 EVM from FTDI port to PC USB port. Thencompany GUI can still display tracking ? Orcompany GUI for IWR6843 3D people counting is only to demo via UART on XDS110 port and can't read SPI data from FTDI port? + +Hi Hector, I believe Charles answered your questions here: /support/sensors/f/1023/t/897434 - SPI will come out, but we don't have applications that support it, so you will have to find a python library that parses SPI. Regards, Justin + diff --git a/data/text/DLP3/898385 b/data/text/DLP3/898385 new file mode 100644 index 0000000000000000000000000000000000000000..a2d687f33691e77d836e944bb30b2e349cafeeb0 --- /dev/null +++ b/data/text/DLP3/898385 @@ -0,0 +1,12 @@ +WEBENCH® Tools/PGA400-Q1: Not able to download GUI for PGA400-Q1 IC + +Part Number: PGA400-Q1 Tool/software: WEBENCH® Design Tools Hi, I'm not able to download GUI of PGA400-Q1. From where i can download its GUI? Thanks & Regards, Amruta + +Hello Amruta, Please go to the PGA400 page here: https:///product/PGA400-Q1 Under "More Information" click to request the datasheet. Once you have been approved, the GUI is available in the mySecure Software page for the PGA400. Regards, + +Hello Scott, Thanks for the reply. Also can i get sample program and programming guide for this IC which will accelerate our development process? Thanks & Regards, Amruta Tundurwar + +Hi Amruta, Can you please give some more details about your application? Is this used for a pressure or current sensing application? Or some capacitive sensing? For pressure sensing in an automotive environment where Q1 qualification is needed I recommend looking into the PGA302 instead. It is currently only available in a commercial version, but an automotive qualified version is planned to be released this year. There will also be a PGA902 which uses the same analog front end and output stage but allows for programming of an internal M0 microcontroller with user-created firmware. The PGA305, PGA300, and PGA900 are all also good options for a pressure sensing application if automotive qualification is not needed. E2E support for firmware development for the PGA400 is limited at this point. There is some example code posted in this earlier thread on E2E: /support/data-converters/f/73/t/687713 but we cannot currently provide any additional development support outside of what is included in that package, and the PGA400 documentation already available on . Regards, + +Hi Scott, It is for current sensing application. We are using SPI communication for it. But i'm not getting any SPI sequence writing sequence for programming PGA400Q1 IC. Also i'm not able to download the GUI for it. Please help me with it. Thanks & Regards, Amruta Tundurwar + diff --git a/data/text/DLP3/898402 b/data/text/DLP3/898402 new file mode 100644 index 0000000000000000000000000000000000000000..58367fa366ddfcb2cb6714ced3976fc81ecee6cb --- /dev/null +++ b/data/text/DLP3/898402 @@ -0,0 +1,12 @@ +BQ27750: Chemistry ID selection + +Part Number: BQ27750 Hi Team, question for BQ27750 chemistry ID selection. 1. Battery Pack: Charge Voltage: 4.35V，Discharge Cut-off Voltage: Cut-off 3.0V 2.how to choose many suitable chemical ID of GPCCHEM?(same capacity? material and voltage?) 3.please kindly help to select the applicable chemistry ID,thsnk. 4.Attachment is Config-report: GPCCHEM return data and Polymer 955255: Cell Spec. 0602.Config-report.zip 955255-4200mAh-3.8V电芯规格书 A0 20190910.pdf + +Hi Tommy, Please refer to: /lit/an/slva725a/slva725a.pdf Typically recommend to use a ChemID that have <3% error match. Thanks, Rushi + +Hi Tommy, You can use the best matching id 1216 that is already recommended in the GPC report. Andy + +Tommy, ChemID 3162 appears to be a closer match in regards to charging voltage and capacity. Thanks, Rushi + +Hi Rushi & Andy, thanks for your suggestion and grest support, if we still have question, we will provide again,thanks. + diff --git a/data/text/DLP3/898407 b/data/text/DLP3/898407 new file mode 100644 index 0000000000000000000000000000000000000000..0d3dc4a6b14cacbc215bf8bd5ac7b3a445cf616d --- /dev/null +++ b/data/text/DLP3/898407 @@ -0,0 +1,8 @@ +BQ24196: Why Sys has a drop voltage + +Part Number: BQ24196 Hi Team, My customer now use BQ24196. When they connected with battery, it is normal and no voltage dropped. When they don't connect with battery, SYS has a voltage dropped when 3.3V power up but no load in 3.3V. I asked them to add SYS output cap bigger. Do you have more suggestion？ Thanks！ + +Hi, What is channel 3 (blue)? BTW, Please visit /support/power-management/f/196/t/877725 for BQ2419X: Schematic Review and PCB Layout Design Tips and /support/power-management/f/196/t/875388 for BQ2419X/2429x FAQs.BQ24196 is similar to BQ24192. Thanks, Ning. + +Hi, We haven’t heard back from you for a while, the thread is considered solved and closed. Thanks, Ning. + diff --git a/data/text/DLP3/898415 b/data/text/DLP3/898415 new file mode 100644 index 0000000000000000000000000000000000000000..1c3ebd42196116b73e8d9169a763f25cdd65c860 --- /dev/null +++ b/data/text/DLP3/898415 @@ -0,0 +1,18 @@ +BQ76940: BQ76940 used for 12 cell configuration : charge discharge Mosfet ON /OFF issue due to UV + +Part Number: BQ76940 Dear Team, We wanted to use BQ76940 used for 12 cell configuration : we are facing problem with charge & discharge Mosfet ON /OFF due to UV. we are able to read all the cell voltage as per cell shorted 12 Series configuration. no issue in cell reading. whatever cells are shorted are reading as 0.050V and it is as expected. We are able to turn on Charge Mosfet but discharge mosfet is not turning on due to again and again fault is getting generated due to UV. 1. How we can avoid UV problem, what will be setting in SW registers? 2. can we turn on both mosfet during charging & discharging? 3. As per my understanding if voltage below 0.5V will not be considered as UV fault, is this understanding correct? Thanks, Devayani + +Hi Devayani, The UV problem is likely caused by the low cell reading issue you are investigating in the other thread: /support/power-management/f/196/t/894969 Solving that issue will most likely solve the UV issue you are seeing as well. I will continue to support you in the other thread and close this one. Best regards, Matt + +Dear Matt, Other thread , I have closed, because that issue is resolved. can you help for this issue of UV and turning on MOSFET for CHG and DSCG. Now All Cell voltage readings are stable with 10mV accuracy, that is really good. Thanks, Devayani + +Hi Devayani, Now that the cell voltages are reading correctly, the UV fault should only occur if the cell voltage is truly low. The under-voltage setting can be adjusted in the UV_TRIP register. An under-voltage condition on one of the cells will always cause the DSG FET to open. If the CHG FET is opening, it may be because of a different fault, so you should read the SYS_STAT register to see which fault is occurring. You can enable the FETs using the SYS_CTRL2 register. Best regards, Matt + +Hi Matt, Thanks for feedback. We will test based on your feedback today and update you further progress. Just for an information: we are reading 0.050V cell voltage (All three group 4th cell reading) which is externally shorted at input side to make 12 cell configuration. Meanwhile please clarify below questions; 1. As per our understanding if cell voltage below 0.5V read by BQ then BQ will not trigger UV fault, is this understanding correct? 2. What is minimum voltage limit set in BQ for under-voltage trigger? 3. How BQ will understand that externally 15Cell or 12Cells are connected physically or different cell configuration as per data sheet? , and trigger UV fault? 4. if we do any wrong calculation (adding off set, ADC gain etc..) in CRC while reading cell voltage, is there any chance to trigger UV fault? Thanks, Devayani + +Hi Devayani, That is correct - if the voltage is below an ADC reading of 0x0518 (which is around 0.5V), the device will consider this a shorted connection and not a real cell. If you made the shorted connections after connecting the cells, the device may need to be reset. You can either cycle power or send the commands to put the device into SHIP mode, then toggle the TS1 pin to boot the device. Best regards, Matt + +Hi Matt, We will test and update you as per your suggestion. meanwhile please answer below questions; 2. What is minimum voltage limit set in BQ for under-voltage trigger? 3. How BQ will understand that externally 15Cell or 12Cells are connected physically or different cell configuration as per data sheet? , and trigger UV fault? 4. if we do any wrong calculation (adding off set, ADC gain etc..) in CRC while reading cell voltage, is there any chance to trigger UV fault? Thanks, Devayani + +Hi Devayani, I believe these questions are all answered in the datasheet - see page 25 where there is a detailed discussion on setting under-voltage and over-voltage thresholds. This will answer questions #2, #3, and #4. (See the NOTE in the middle of the page which directly answers question #3). Matt + diff --git a/data/text/DLP3/898417 b/data/text/DLP3/898417 new file mode 100644 index 0000000000000000000000000000000000000000..fed9e0250eacd69cb21e10ba149535d880942417 --- /dev/null +++ b/data/text/DLP3/898417 @@ -0,0 +1,10 @@ +TPS54620: how to calculate the power dissipation of the device? + +Part Number: TPS54620 Hi, there is an app note that tells us how to calculate efficiency and it's written based on TPS54620 /lit/an/slva390a/slva390a.pdf On page 5 equation (16), P=Io*Io*Rdcr=4A*4A*0.104ohm=166.4mW which is wrong, it should be 1.664W. If it's 1.664W, then equation (17) other losses would be negative. So I would like to know where is wrong? Further more, I ask this question because my customer would like to calculate the junction temperature By using Tj= Ttop+ ψJT*(power dissipation on device). Then we need to calculate the power dissipation on device. But how can we calculate that? Is it (Pfet+other losses) described in the app note above SLVA390A? + +Howard, The mistake is in the inductor DCR. It should be 10.4 mohm, not 0.104 ohm. + +Hi Howard, Is the customer trying to estimate the junction temperature based on some ambient temperature condition or is the customer trying to calculate the junction temperature based on a measurement? The Psi JT number is used for estimating the junction temperature based on a measurement of the temperature at the top of the IC package. As this is a measurement, the customer could measure the efficiency or power loss at the same time the temperature is measured. The DC and AC power loss in the inductor should be subtracted from the total power loss. Additionally, as Psi JT number is generally very small, the junction temperature is very close to the temperature at the top of the IC package. + +Hi Howard, Just trying to follow up on Anthony's question. Regards, Gerold + diff --git a/data/text/DLP3/898425 b/data/text/DLP3/898425 new file mode 100644 index 0000000000000000000000000000000000000000..c3e23ff3ec74cccd5d309bf86e8e5b2522a132d9 --- /dev/null +++ b/data/text/DLP3/898425 @@ -0,0 +1,10 @@ +BQ4050: LED Display, Auto Start of FETs, SMB Bus connection + +Part Number: BQ4050 I have a custom board with BQ4050 and BQ25703a and an EV2400 for development purpose. So far everything works as expected but I do have some minor issues/questions: I have the /DISP pin shortened to GND. Is it still possible to drive the LEDs to indicate SOC? I plan for a battery that is NR, and the NR bit is set. However, for development purposes I can disconnect the battery over a connector to power the system off. Whenever I connect the battery to the system, the FETs won't turn on, I have to frist put in the power adapter and then the FETs turn on. Is there a way to turn on FETs automatically when BQ4050 detects a battery? Note: PRES is permanently connected to GND. I can read the BQ4050 registers with ESP32. However, after a couple of minutes I cannot read certain values (e.g. cell voltages) anymore, althought some value are still readable (e.g. SOC). Any ideas on this issue? + +See my answers below. I have the /DISP pin shortened to GND. Is it still possible to drive the LEDs to indicate SOC? [Andy]No. As you see in the TRM, the bq4050 device has an LED display that shows various status information when a high-to-low transition of the DISP pin is detected. I plan for a battery that is NR, and the NR bit is set. However, for development purposes I can disconnect the battery over a connector to power the system off. Whenever I connect the battery to the system, the FETs won't turn on, I have to frist put in the power adapter and then the FETs turn on. Is there a way to turn on FETs automatically when BQ4050 detects a battery? Note: PRES is permanently connected to GND. [Andy] No. The gauge assumes it works in the NON-REMOVABLE mode since the NR bit has been set. I can read the BQ4050 registers with ESP32. However, after a couple of minutes I cannot read certain values (e.g. cell voltages) anymore, althought some value are still readable (e.g. SOC). Any ideas on this issue? [Andy]Try bqStudio and see if you can see the same problem. + +Thank you. I would have another 2 question: When is a secondary cell voltage monitor (e.g. bq294502) necessary in addition to bq4050 and bq25703a? Is there any further reading available on this topic? It seems like bq28z610 would be a suitable replacement for my application, as it has a lower external component count and I only have a 2s config. Would this be an appropriate replacement? Are there any drawbacks (e.g. more effort to calibrate or set up)? + +See my comments below. 1) See this thread /support/power-management/f/196/t/616636. 2) BQ4050 a CEDV based gauge while BQ28z610 is an Impedance Track gauge. Normally, bq28z610 is able to provide more accurate SoC prediction. In addition, bq28z610 needs a correct chemistry id to work properly and also a learning cycle needs to be done. Andy + diff --git a/data/text/DLP3/898434 b/data/text/DLP3/898434 new file mode 100644 index 0000000000000000000000000000000000000000..c982b40e3764e0ed0fa4f38e682bd07ab49de4cc --- /dev/null +++ b/data/text/DLP3/898434 @@ -0,0 +1,12 @@ +UCD9248： three UCD9248 can’t be scanned at the same time + +Part Number: UCD9248 I am usingcompany 's software Fusion Digital Power Designer to configure UCD9248. My hardware schematic is same with the Xilinx KC705 board. There are three UCD9248 on my board. When I connect the PC and my board with TI's USB-to-GPIO, the three UCD9248 can’t be scanned at the same time, and in most cases only one UCD9248 is scanned. In the kc705 board, the 1-pin voltage of the transistor FCX491A is 4.0v, and the 3-pin voltage is 3.3v, but the measured results of our board are 3.3v and 2.7v respectively.According to the UCD9248 datasheet, the voltage of V33FB port is 4-4.6v, and the voltage of V33D port is 3.3-3.6v. At first, I thought that the voltage of the my board was insufficient to supply UCD9248, so it could not be scanned. Therefore, the power supply circuit of the first UCD9248 was adjusted. When the resistance R3 was changed to 2K, the same voltage value as Xilinx KC705 board could be obtained. However, the scan results did not change. The second question is when the first chip is scanned, the address is not the same as the theoretical value. The addr-0 and addr-1 pins are connected with 75K resistors . The theoretical address value is 52, but when it is scanned, the address value is 42. The address values of the other two UCD9248 are the same as the theoretical values. Please give me some suggestions. Thank you very much. + +Hello, Which Fusion version are you using? Thanks Qian + +Hello,Qian,we use Fusion Digital Power Designer 7.2.1. Thanks. + +Hi, I don't know why address 52 is scanned as 42. Can you double check the resistor value? For the issue that Fusion can not find all devices, I'm checking with Fusion team if they have any idea. As a work around solution, you can let Fusion to scan device at particular address. By this way, they can find device at any address. For example, at below screenshot, the Fusion will only scan the part at address 52. + +Hi, 1. The issue with scanning 3 devices at the same time and can only detect one: might due to devices' addresses (#2 below) => communication issue. Try fixing #2 and see if #1 is also fixed. 2. The issue with device's theoretical address (52) being scanned as 42 might due to resistor tolerance. Try using different resistors, avoid using resistor at the boundary such as 75 kOhm. Due to resistor tolerance and voltage level, address bin might be 4, or 5, or 3. Try, for example, resistor 68 kOhm (between 75K and 64.9K) and see if it fix the issue. Regards Anne Ngo customer organization + diff --git a/data/text/DLP3/898441 b/data/text/DLP3/898441 new file mode 100644 index 0000000000000000000000000000000000000000..14bad6d5da1a3158e036a213e687e237fa1b8767 --- /dev/null +++ b/data/text/DLP3/898441 @@ -0,0 +1,6 @@ +BQ25890: several quesions in bq25890 + +Part Number: BQ25890 Hi team, this is brandon. i'm facing several question related to register. 1) while we almost finish charging process, the charger IC would report interrupt information interimittent. we also faced this situation, when cell was almost finish charging, if we pulg in the adapter for charging, the charger IC would constantly report interrupt; sometimes the VSYS_Regulation Status would set to 1; 2) when the system shut off, if we plug in TYPE-C to restart the system, whether should we reset the register first? how long should we wait when the register would update the value?(sometimes we found that when plug in TYPE-C to restart the system, the battery was not in charging state, during this time, the VBUS_STAT was 00, and CHRG_STAT was 0); BR Brandon. + +Brandon, 1) The following events will generate 256-µs INT pulse including charge complete and adaptor plugging in. • USB/adapter source identified (through PSEL or DPDM detection, with OTG pin) • Good input source detected – VBUS above battery (not in sleep) – VBUS below VACOV threshold – VBUS above VVBUSMIN (typical 3.8 V) when IBADSRC (typical 30 mA) current is applied (not a poor source) • Charge Complete • Input removed • Any FAULT event in REG0C 2) a. If there are no valid VBUS and VBAT, the device will power-on-reset when plugging in valid adaptor. And all the registers are reset to default value. b. If valid VBAT is present, then plugging in valid adaptor, after the Input Source Type Detection is done, an INT pulse is asserted to the host. In addition, the following registers including Input Current Limit register (IINLIM), VBUS_STAT, SDP_STAT and Input Voltage Limit (VINDPM) etc are updated, other writable registers should be unchanged. Thanks, Ning + diff --git a/data/text/DLP3/898446 b/data/text/DLP3/898446 new file mode 100644 index 0000000000000000000000000000000000000000..883d41ea9f77c1e9ceeae3f7c9ae48477d67085c --- /dev/null +++ b/data/text/DLP3/898446 @@ -0,0 +1,12 @@ +BQ28Z610: Unable to write to Data Flash memory using Advanced Communication tab. + +Part Number: BQ28Z610 Attempting to write to the Data Flash section of the device. I am successfully able to write to a Data Flash location to modify a parameter using the Data Memory tab of BQ Studio but am unable to perform this write executing the identical bus sequence with the Advanced Communication tab (nor in code as well). I have verified the bus sequences are identical using an I2C protocol analyzer yet when I write with the Advanced Com tab in BQ Studio the flash write does not persist when I read back the value (old value remains). Other than timing perhaps, what would be the difference between using the Data Memory tab vs the Advanced Com tab to perform the Data Flash write even though the bus sequences are identical? + +Take a look a the following thread. /support/power-management/f/196/t/738029 Andy + +Thank you Andy for your prompt reply. This thread solved my issues. It was related to checksum and length. I will flag as resolved. One other question: Is it true that in order to simply read the data flash the device must have unsealed access? It seems this is true. I find this very, very unfortunate as just to check if a feature is enabled/disabled the risk of unsealing the device is required. Is there any work-around for this? + +No. In SEALED mode, standard register information is accessible. Extended MAC Commands functions and data flash are NOT accessible. + +This is most unfortunate that there is not a method to simply check if a feature is enabled/disabled without unsealing. I feel at a MINIMUM the Manufacturer Info Block data should be readable while unsealed so you could at least flag if you have previously enabled/disabled a setting. Thank you. + diff --git a/data/text/DLP3/898459 b/data/text/DLP3/898459 new file mode 100644 index 0000000000000000000000000000000000000000..0a570090e28ce12b1fa90a8276335db962423f7a --- /dev/null +++ b/data/text/DLP3/898459 @@ -0,0 +1,12 @@ +UCC12040: EMI radiation data + +Part Number: UCC12040 Team, Do we have EMI measurements of how the UCC12040 behaves? A customer of mine would like to see some real measurements done on a reference board. Thanks, Robert + +Hi Robert, I will need to ask my colleagues in the US. I hope to have a response later today. Regards Peter + +Hi Robert, I have attached for the UCC12050 which will have the same behaviour as the UCC12040. Regards PeterRE All 30-1000MHz Magneto SSM2Layer 50 ohm Load_Graph_Horizontal.pdfRE All 30-1000MHz Magneto SSM2Layer 50 ohm Load_Graph_Vertical.pdfRE All 30-1000MHz Magneto SSM2Layer 50 ohm Load_Table_Horizontal Pre-Sc....pdfRE All 30-1000MHz Magneto SSM2Layer 50 ohm Load_Table_Vertical Pre-Scan....pdf Regards Peter + +Thanks Peter! But there is an additional question. In All 30-1000MHz Magneto SSM2Layer 50 ohm Load_Graph_Horizontal.pdf the first peak at 38.23 MHz is only 5 dB below the limit. Looks like a 50 Ohm resistive load was used. Would be better to use an 'artifical Hand' (220pF + 510Ω) to GND, as this is what regulations like EN 60601-1-2 ask for. Do we also have such measurements? Best regards, Robert + +Hi Robert, That is all that we have, I will feed your comments back to the team it looks like EN 60601-1-2 is targeted to medical devices, I think the team are probably focused on the industrial market in the first instance so the requirements may be different. How much margin are you looking for from the limit line? Regards Peter + diff --git a/data/text/DLP3/898480 b/data/text/DLP3/898480 new file mode 100644 index 0000000000000000000000000000000000000000..42b05849c9d0a7f25a820879127f2052939b73e4 --- /dev/null +++ b/data/text/DLP3/898480 @@ -0,0 +1,14 @@ +TPS62810-Q1: Power Good + +Part Number: TPS62810-Q1 Hi, I understand that the PG only responds to a variation of the voltage regulated downwards. Consequently, if the voltage rises in a worrying way, I could not know this by only monitoring the PG. Correct? I do see that the IC has UVP and also OVP Power Good so I might be wrong for the above? For example let's assume that the PGOOD is not monitored and therefore has no way of understanding if everything is in order. If an external entity forced the regulated voltage to a value greater or less than the nominal one, would the IC would continue to work as if nothing had happened or would switch off? Obviously, being protected from short circuit, the integrated will respond if the output is brought to ground. But for intermediate values or higher than the nominal one? Many Thanks, Antonio + +Hello Antonio, As you can see with UVP and OVP, PG states the good regulation of the output voltage at the intended value if VOUT is between UVP and OVP window. PG is an indicator which in TPS62810-Q1 is providing a binary output state. If VOUT was regulated at intended value within UVP and OVP window, PG=VOUT (referring to schematic page 1 of D/S). Then if the voltage rises above OVP as you mentioned, PG=0 if voltage at feedback is reaching 110% (raising typical value) of VOUT. If an external entity forced the regulated voltage to a value greater or less than the nominal one. The TPS62810-Q1 would try to regulate the output, you would need to refer to the Current limit section (9.4.4 and 9.4.5 topic in Datasheet). Let me know if you have any further questions. Thanks a lot! Regards, Dorian + +Hi Dorian, Ok, thank you clear. The assumptions, however, were that pin was not monitored. Without relying on the PG signal, I seem to understand that in the event of "external forcing" (therefore of bad regulation) the IC continues to work trying to regulate the output. At that point, the only parameter we can rely on is the current, or rather the over-current protection system. In the event that the output is brought to GND, it is easy to guess that the protection takes over and we are all safe. It is more difficult to understand what would happen if the output were forced, let's say 130% of the nominal value. I know it is perhaps a stupid question because this is highly unlikely to happen, but perhaps not too much. Take for example the LM46002 (I guess it has similar logic) to generate the 5V for the USB HOST device. This voltage is brought to the outside through the connector and the PGOOD is not connected to the enable of the uC to prevent a problem on USB from turning off everything. Suppose someone connects 6V ... what would then happen here? Many Thanks, Antonio + +Hello Antonio, I would like to understand how this 130% of output voltage could happen, are you referring to someone forcing a voltage at the output? How would behave the TPS62810-Q1? The following App-Note is a good read on this question: /lit/an/slyt689/slyt689.pdf Your device should then be used in PFM to prevent Boost behavior at the input or use an additional diode. Was is the question you are asking here? Thank you, Dorian + +Hi Dorian, Thanks a lot for the answer. The suggested document is interesting. Your interpretation is correct. The question is "what happens if someone forces the Vout beyond a certain threshold?". More than the solution, I would like to understand what would happen to the IC in these conditions if kept in Forced PWM mode and in the absence of a diode. But I guess it's not easy to say. Many Thanks, Antonio + +Hello Antonio, I think this is answered in the same App Note (section 6. Prohibit the bosst mode of step-down converters), if you force Vout beyond a certain threshold with IC in FPWM. Then your IC can behave like a boost converter, which you want to avoid. Current might flow from output to input, and enable IC which will start to act like a boost converter as inductor would be at the input of that system. Does this answer your question? Thanks a lot! Regards, Dorian + diff --git a/data/text/DLP3/898482 b/data/text/DLP3/898482 new file mode 100644 index 0000000000000000000000000000000000000000..5d733e69187f3c4df77696d0c4a1fc6b0beef671 --- /dev/null +++ b/data/text/DLP3/898482 @@ -0,0 +1,8 @@ +TPS65150: Abnormally spike at voffset of TPS65150 without load + +Part Number: TPS65150 Hi team, My customer is using our TPS65150 and see an unpredictable behavior since no load condition. Please refer the below waveform and schematic. We found that there is a SPIKE with a waveform of about 11.41V on VOFFSET as below figure. This SPIKE occurred when VREST reached -14V. Is there any work around or any suggestions to prevent it. Currently, this The waveform is measured without load. Thanks. + +Hello, I have notified our expert regarding this topic. Please expect a response by 4/24/20. Thanks, Costin + +Hello Feng, Can you please measure current on the VOFFSET supply to see if there is a big current step? I suggest to remove C9815 and disconnect U9805 circuits from VRESET to see if these circuits are causing a big current step on VOFFSET. A big current step on OFFSET is the likely cause of the this spike so you can try to debug it further from this point of view. Kind Regards, Liaqat + diff --git a/data/text/DLP3/898488 b/data/text/DLP3/898488 new file mode 100644 index 0000000000000000000000000000000000000000..c2f0accba73540275c1f52f91974b3190e27dd65 --- /dev/null +++ b/data/text/DLP3/898488 @@ -0,0 +1,12 @@ +TPS55340: Isolated Continuous Conduction Mode Flyback Using the TPS55340- SLVA559– January2013 + +Part Number: TPS55340 In SLVA559 a circuit with a TPS55340 for an isolated flyback is presented. It seems that the circuit (Figure1. Reference Design Schematic) was drawn with TINA. Is the TINA-TI Refernce design (TSC-file) available for download? Kind Regards Hans + +Hi Hans, Thanks for your interest in TPS55340. I believe it is. Please check the model in /product/TPS55340/toolssoftware Thanks, Yinsong + +Hi Yinsong, Thank you for your quick reply. Under the link i found the TINA transient model for the TSP55340 and a reference design for a boost converter. But i am looking for the reference design in figure 1 presented in SLVA559 for an isolated flyback. Is this flyback reference design available for TINA or webench power designer? Thanks in advance and kind regards Hans + +Hi Hans, Sorry I thought you just want a model for the flyback. Right now we only have boost reference design. But the transient model is good for simulation in flyback. Thanks, Yinsong + +Hi Yinsong, Thank you for your response. Then I will try my luck with the transient model. Kind Regards Hans + diff --git a/data/text/DLP3/898494 b/data/text/DLP3/898494 new file mode 100644 index 0000000000000000000000000000000000000000..1c98901b0817b57838726aff4b0466c95ed74013 --- /dev/null +++ b/data/text/DLP3/898494 @@ -0,0 +1,10 @@ +TPS61089: How to improve the performance of load transient + +Part Number: TPS61089 Hicompany team , My customer used TPS61089 which comp circuit is the same as Typical Application in specfication. But they found the load transmit are not both quickly and good(Test conditons:0A@ 0.5ms ->2A @ 0.5ms) And there is a huge voltage-drop like the following picture. we will appreciate ifcompany can give some advice to improve performance of load transient.Thank you! + +Dear Sir, We need to know Vin, Vo and your current schematic. + +Hi Helen , The VIn is 7.2V and the OUT is 12V/3A. The attachment is their sch. Thank you! + +I found you use a 0.1uF VCC cap, please change it to 2.2uF/16V rating cap. 0.1uF is really too small. But this may not the root cause of the output voltage drop. You can increase the Rcomp=30k, ccomp=2.2nF for a double check, by the way, what is the output cap effective capacitance under 12VDC bias? + diff --git a/data/text/DLP3/898501 b/data/text/DLP3/898501 new file mode 100644 index 0000000000000000000000000000000000000000..b405c5fc3cf58c26d2b95234bf615a95656aa19c --- /dev/null +++ b/data/text/DLP3/898501 @@ -0,0 +1,6 @@ +TPS61023: Calculating Feedforward Cap + +Part Number: TPS61023 Hi Team, When looking at the TPS61023 datasheet, there are two conditions for what frequency to select the Cff value to make a zero frequency (pasted below): For large output capacitance more than 40 μF application,company recommends a feedforward capacitor to set the zero frequency (fFFZ) to 1 kHz. As for the input voltage lower than 1-V application,company recommends to use the effective output capacitance is about 100 µF and set the zero frequency (fFFZ) to 1 kHz. Are both of these supposed to be 1kHz? When looking at the TPS61022 datasheet it has a similar statement but with two different frequencies, see below: For large output capacitance more than 40 μF application,company recommends a feedforward capacitor to set the zero frequency (fFFZ) to 2 kHz. As for the input voltage lower than 2-V application,company recommends setting the zero frequency (fFFZ) to 20 kHz when the effective output capacitance is less than 40 μF. Thank you! Reed + +Hi ReedKacz, For the first conditions of large output capacitance more than 40uF, setting the zero at 1kHz and 2kHz are the same. For the second condition, in TPS61023 datasheet, it is low Vin and large Cout, so the datasheet recommends setting the zero to 1kHz. in TPS61022 datasheet, it is low Vin and low Cout, so the power stage pole 2/(2pi*Rout*Cout) is high, the zero frequency(fFFZ) doesn't need to be at 2kHZ. But if Cout is also large, I would suggest set the fFFZ at around 1~2kHz. You can use TPS61023 calculation tool to look at the bode plot: /product/TPS61023/toolssoftware + diff --git a/data/text/DLP3/898505 b/data/text/DLP3/898505 new file mode 100644 index 0000000000000000000000000000000000000000..8e53c037f55a33714ce141aa4559f928d3e16e06 --- /dev/null +++ b/data/text/DLP3/898505 @@ -0,0 +1,6 @@ +TPS61022: Higher Vin_min at higher loads? + +Part Number: TPS61022 Hello, The PMP30528 suggests that Vout goes to zero when Vin is below 1.8V at 2A load (see 2.4.1 and 2.4.2 in test report of PMP30528). Is that a general behavior of the TPS61022? Regards + +Hi Kaya, TPS61022 Vout should be at 3.9V when Vin is at around 1.8V because TPS61022 switch valley current limit is at least 6.5A. I'll contact this PMP designer to discuss this behavior. Thanks for reminding it. + diff --git a/data/text/DLP3/898507 b/data/text/DLP3/898507 new file mode 100644 index 0000000000000000000000000000000000000000..a34adc50980bd1bee9603fb33f4e4de74c116578 --- /dev/null +++ b/data/text/DLP3/898507 @@ -0,0 +1,8 @@ +Competitive Device against PESD0402-140 + +Hi Team, Is there a competitive device we have in our portfolio to compete with the PESD0402-140? Thanks, Jared + +Hi Jared, The PESD0402-140 is an ESD device with a working voltage of up to 14V. At that high voltage the only devices we have is our TVS family of devices. For bidirectional protection at a 14V range I would suggest the TVS1401. However, this device does have a much higher capacitance, which could be a problem if used in high speed data lines. What would be the application for this device? (i.e. voltage range, data speed) Best regards, Andy Robles + +Hello Andy, Thank you for the quick reply! I do not have those details readily available, but will let you know if I have further questions. Thanks! -Jared + diff --git a/data/text/DLP3/898509 b/data/text/DLP3/898509 new file mode 100644 index 0000000000000000000000000000000000000000..b43e2ff2ddb0334cb54ec34bd116e2bc555f4556 --- /dev/null +++ b/data/text/DLP3/898509 @@ -0,0 +1,8 @@ +Competitive Device against PGB1010603NR + +Hi Team, Do we have a competitive device to compete against the PGB1010603NR? Thank you, Jared + +Hi Jared, The PGB1010603NR is an ESD device with a working voltage of up to 24V. At that high voltage the only devices we have is our TVS family of devices. For bidirectional protection at a 24V range I would suggest the TVS2701. However, this device does have a much higher capacitance, which could be a problem if used in high speed data lines. What would be the application for this device? (i.e. voltage range, data speed) Best regards, Andy Robles + +Hello Andy, Thank you for the quick reply! I do not have those details readily available, but will let you know if I have further questions. Thanks! -Jared + diff --git a/data/text/DLP3/898512 b/data/text/DLP3/898512 new file mode 100644 index 0000000000000000000000000000000000000000..f285859595522e35f073dfe40b1e831e8a7a4c66 --- /dev/null +++ b/data/text/DLP3/898512 @@ -0,0 +1,14 @@ +LM5069: Reverse current during motor Regen + +Part Number: LM5069 Hi, I am going to use this device as the application note suggested, but the information is not clear about the reverse current. During the reverse current the source voltage go higher than the gate (or enough to turn off the MOSFET). So the reverse current will flow through the MOSFET body diode for a shorter period, until the drain voltage (Vin) equal (one diode drop less) to the source to turn on the MOSFET again. Does it going to cause any issues. Hot swap circuit in my application is situated between the motor and the load dump, the current flows in reverse direction when the motor in Regen mode. Thank you Siva + +Hi Siva, If the LM5069 stays in enabled state, the external MOSFET remains in fully enhanced state and allows reverse current to flow from Source to the Drain. You have to make sure that the input is capable to absorb the energy (i.e., enough capacitance or supply having sinking capability). Let me know if it is not clear. Best Regards, Rakesh + +Hi Rakesh, Thanks for the info. Yes we dump this energy using the load dump. How the MOSFET remains in conduction even the source voltage goes above the gate voltage. Do you mean as I have mentioned the body diode makes the Vin to go high, so keep the Vgs in biasing region. Regards Siva + +Hi Siva, Under this condition, the drain voltage follows the source voltage (through body diode or though the MOSFET channel if the MOSFET is already in ON condition). The controller biases the GATE potential at Vin+12V always unless the controller sees OV, UV fault. You can use simulation tools to verify /product/LM5069/toolssoftware Best Regards, Rakesh + +Hi Rakesh, Thanks for the info. Does these TINA models work in LTSpice. Regards Siva + +Hi Siva, You can use unencrypted PSpice model in LTSpice. I have sent you private message. Please reach me for the same. Best Regards, Rakesh + diff --git a/data/text/DLP3/898520 b/data/text/DLP3/898520 new file mode 100644 index 0000000000000000000000000000000000000000..64037fe04fee4db2d67a131ded4361d53889e417 --- /dev/null +++ b/data/text/DLP3/898520 @@ -0,0 +1,6 @@ +TPS54308: Switching current to flow under the device + +Part Number: TPS54308 Hello! The datasheet says not to allow switching to flow under the device. Is this a suggestion or a hard rule? I have a customer that is far into their design that includes the switch node coming out from under the device, passing by the ground pin. I can send their layout privately if helpful. Thanks! + +Hi Lindsey, Generally speaking, the SW is not allowed to be routed under the IC. GND trace is ok. You can also follow the layout example of TPS56339EVM. This layout is better than the TPS54308. + diff --git a/data/text/DLP3/898527 b/data/text/DLP3/898527 new file mode 100644 index 0000000000000000000000000000000000000000..b474130794f9e90b4550522bf25e4a8c23651680 --- /dev/null +++ b/data/text/DLP3/898527 @@ -0,0 +1,12 @@ +BQ34Z100-G1: Training material for the golden unit + +Part Number: BQ34Z100-G1 Dear team, our customer is developing his own battery pack based on 5S NiMH cells. The battery cell planned is VH1800AA. They selected BQ34Z100-G1 The customer told me they did not receive the chemistry files from the cell manufacturer and will have to create their own golden image file. (Or can we look up this type of battery in BQ Studio?) The customer is wondering if there was training material he could follow to do create the golden image. He would also want to have design reviewed. I do have the schematic and battery information under NDA but this needs to be done offline. How can we do this? Would BQ34Z100-G1 be the best part or should they move to BQ34110 or some other part? There will be a MCU in the pack as the customer has his own LED indication scheme - so no use of the LED feature of BQ34Z100-G1. many thanks Lutz + +Please use the instructions from /tool/GPCCHEM to find a ChemID. Make sure that the charge termination configuration is appropriate for NiMH cells (see TRM, 3.2.16 Charge Efficiency and 3.7 Charging and Charge Termination Indication). For a golden image, you must configure the ChemID, charge termination, system parameters (e.g. Terminate Voltage, load configuration, discharge/charge/quit thresholds) and then run a learning cycle: /how-perform-successful-learning-cycle-gauges + +Thanks Dominik, this is very helpful. We will go a ahead an create try to create the golden image. Could you also comment on the question if BQ34Z100 is the better choice over BQ34110 or are both equal options? Also how could we check the customer's schematic offline. Should I just send it to you? thanks Lutz + +These two gauges use totally different gauging algorithms. It depends on the application which one is better. In general, the bq34z100 is likely to handle more applications over larger temperatures. The bq34110 is better suited for rarely discharged applications and has the ability to estimate cell deterioration even without full discharges. + +OK, I see, many thanks, I will discuss with the customer. Lutz + diff --git a/data/text/DLP3/898538 b/data/text/DLP3/898538 new file mode 100644 index 0000000000000000000000000000000000000000..37539abd7917f4779bb0cb7d509caa9e32f49f7c --- /dev/null +++ b/data/text/DLP3/898538 @@ -0,0 +1,14 @@ +Asking for the power switch recommendation + +Hi Team, Customer is designing new project with power switch Would you please provide recommend the p2p solution to replace the following two parts? G517D1T11U G524B1T11U BR, SHH + +Hi SHH, Welcome to E2E! We do not have P2P solutions for these devices, but have some devices that offer similar functionality. The G517D1T11U and G524B1T11U are both devices with reverse current blocking and over current protection. These functionalities are offered in the TPS22948, but the TPS22948 can only handle 240mA typical. We also have the TPS22919 which offers short circuit protection, but does not have reverse current blocking. What are the key specs that the customer likes from these two devices? Best regards, Andy Robles + +Hi Andy, thanks for feedback. customer design this in the USB port for OCP protection. BR, SHH + +Hi SHH, I will be re-assigning the thread to a team I believe would have similar devices to the ones you mentioned. Someone will get back to you shortly. Best regards, Andy Robles + +Hi SHH, Please check TPS25221. For G524, can you help tell me the package? For TI's policy, I will first click resolved button. If you have any other concern, contact me any time. If you think resolved, please help click 'Issue is solved button'. Thanks. + +Hi SHH, Also check TPS2065 and TPS2069. For TI's policy, I will first click resolved button. If you have any other concern, contact me any time. If you think resolved, please help click 'Issue is solved button'. Thanks. + diff --git a/data/text/DLP3/898540 b/data/text/DLP3/898540 new file mode 100644 index 0000000000000000000000000000000000000000..5818849f7b6ade63f95821579dadd0abbb50b576 --- /dev/null +++ b/data/text/DLP3/898540 @@ -0,0 +1,6 @@ +UCC38C44: SLUA274A app note questions + +Part Number: UCC38C44 Hi team, I had a few questions regarding the SLUA274A app note in relation to the UCC38C44. In section 2.5, under the equation for the snubber calulcation, equation 13 has a variable labeled "T". What does this refer to, turns ratio? Equations 12, 13, 14 for snubber calc are not the same as in SLUA086 pages 14 and 15. Both give similar capacitor and resistor values but very different resistor power dissipation. The difference between the 2 different equations is in SLUA274A the Rpri-clamp term divides into the entire rest of the equation while in SLUA086 it only divides into the last “V” = N(Vo+Vd) term. Can you tell me which equation is preferred? I appreciate the help! Thanks, AH + +Hi AH, T is the switching period. The equation 34 in SLUA086 is right. Regards, Teng + diff --git a/data/text/DLP3/898544 b/data/text/DLP3/898544 new file mode 100644 index 0000000000000000000000000000000000000000..fb540d41841f50f503d441567fc84e72fe3e7c02 --- /dev/null +++ b/data/text/DLP3/898544 @@ -0,0 +1,6 @@ +BQ24780S: What is the minimum headroom required for this part? Is it a requirement to have 2V minimum voltage difference between the input and output? + +Part Number: BQ24780S Our host has a 17V DC input for the built-in charger, which uses bq24780S. Currently, wehave a battery with 15V charging voltage. But what is we use a battery that has a higher charging voltage? We want to know the minimum headroom required for this part. The charging current is around 1.5A. + +Hi Lauren, Theoretically, as the battery voltage approaches the adapter voltage, the duty cycle approaches 100%. However, two things get in the way of this. Firstly, the conductive loss creates a voltage drop, so that whatever is your conductive loss voltage drop, that is the voltage differential where you would actually hit 100% duty cycle. Secondly,BQ24780s drives NFET switches using charge pump built with the BTST capacitor. Even if you try to drive at 100% duty cycle you won't quite get there because there is a forced refresh pulse on the BTST circuit. I can't really give you an exact cutoff for the device, because it is very dependent on external components. The BQ24780s does not have an enforced duty cycle cutoff, so you will see it switch right up to the point that it reaches that almost-100% duty cycle point. On the EVM at 800 kHz, this is generally around 0.8-1V for 2A. But keep in mind that as you approach this 0.8-1 V point, you will start to see increased ripple at the input. Around 1.3-1.5V the input ripple will start to increase and it will get worse and worse until you reach that 0.8 - 1.0V point. If you need a really tight dropout, I would recommend that you move to the BQ24800, which has options for 300kHz and 400 kHz switching. The lower switching frequencies give you a little more headroom (maybe 200 mV.) The BQ24800 also has some improvements to reduce the ripple at very high duty cycle. Since there isn't really a hard cut-off, I really think the best way to answer the question is to experiment with the EVM, keeping in mind that changing the external components may change the results slightly in the final system. Regards, Steve + diff --git a/data/text/DLP3/898549 b/data/text/DLP3/898549 new file mode 100644 index 0000000000000000000000000000000000000000..f4eaadc724ff7e956a627004e1becf3702effdd1 --- /dev/null +++ b/data/text/DLP3/898549 @@ -0,0 +1,22 @@ +BQ27542-G1: Tracking charge of a primary battery + +Part Number: BQ27542-G1 Hi, I have a primary battery (non-rechargeable) and would like to track how much charge has been used to calculate remaining battery capacity. What is the best way to do this with this particular fuel gauge? I have looked in depth at the data sheet and reference manual and do see that there are many available commands. Are there any commands that can provide the information I am looking for? Thank you + +The bq27542 is intended for rechargeable batteries. There is no direct way to read the coulomb count from the bq27542. There's PassedCharge() but this will be cleared during relax and the gauge can adjust this not just by coulomb count but also when it tries to measure cell impedance and needs to correct the coulomb count.company has the bq35100 for primary cells. This one uses a coulomb counter to determine remaining capacity. + +Thank you for your response. I appreciate the feedback. The BQ27542-G1 Fuel Gauge was selected in the early design process and has already been implemented in circuitry. Due to budget concerns, we are hoping to not have to make a design change by replacing the BQ27542 with the BQ35100, which would require ordering new boards. Is there anyway to get a measurement that would be close to what we are looking for? You mentioned using the PassedCharge() command as a potential option. Our previous approach was going to be to read the NomAvailableCapacity() with the assumption that this is relative to the design capacity stored in Flash. We are willing to make the change to the BQ35100 if there are absolutely no other options, but we are looking to explore any options that might be available with the BQ27542 first. + +If the OCV curve (OCV vs. depth of discharge) is steep enough that the gauge can take accurate DOD vs. OCV lookup for your primary cell, then the impedance tracking gauge may still give you good results. If the OCV vs. DOD curve is flat then it's probably futile to try to make this gauge work well. One work-around would be to use PassedCharge() as a coulomb count information source and disregard all other gauging information from the gauge. On your uC, add code that detects if PassedCharge was reset (or the absolute value dropped) and accumulate the true coulomb count since start of use of the primary cell. You'd have to catch the point when the gauge sets PassedCharge to 0 to make this reliable. Passed Charge = 10, 20, 30, 40, 0, 5, 6, 17... Accumulated charge = 10, 20, 30, 40, 45, 46, 57... With this you'd effectively reduce the gauge to a coulomb counter. + +A few questions: 1. Our OCV curve is flat. Are you saying that the PassedCharge() could be a work around either way, steep OCV curve or flat? Or would this work around only be applicable if our OCV curve were steep? 2. For PassedCharge(), you mentioned that is cleared during relax. Is there a way to force reset of PassedCharge() so that it happens at a known time? 3. Also, is there a way to know when cell impedance is being measured or to prevent it from being measured at all? 4 Going back to the NomAvailableCapacity() command. What are the specific concerns with using this approach? Could you provide more detail on why this would or wouldn't work? 5. Another concern we have is that the maximum value of Design Capacity that can be stored according to the datasheet is 14,500 mAh, while our selected battery has a capacity of 19,000 mAh. What impact would this have, if any, on the available measurements? Thank you + +#1: If the OCV curve is flat then trying to shoehorn the IT algorithm is not going to work. This algorithm doesn't just use coulomb count but discharge simulations that depend on depth of discharge calculations which rely on OCV measurements and an OCV curve that is steep enough for the voltage measurement accuracy of the gauge hardware. If you are able to write your driver to accumulate the passed charge (which the IT algorithm will reset to 0 during relax if cell voltage is not drifting) then you can use the total accumulated passed charge in your driver to estimate how much is left in your primary cell. You would effectively only use the coulomb counter of the gauge and ignore all other gauging results (like RM, FCC, SOC etc - none of these will return accurate values for your primary cell). This is independent from OCV curve shape. #2: Yes, issue IT_ENABLE. This will restart the gauging process and should reset the passed charge. #3: Cell impedance won't be measured until the gauge measured QMax. The gauge indicates Ra learning in Update Status and with bit RUPDIS #4: The IT algorithm won't work with a primary cell that has a flat OCV because every time the cell relaxes long enough, the algorithm will calculate DOD based on OCV and if that is flat, the gauge will have a large DOD error which will affect all capacity simulations. So all you can do with a cell like that is move to a gauge that was developed for a primary cell or use the coulomb counter approach / workaround as described in this thread. Nominal Available Capacity still relies on accurate DOD. #5: As you effectively have to discard the IT algorithm and only use the coulomb counter via PassedCharge(), DesignCapacity won't matter. You really can't use the gauging algorithm for this type of cell - the meaningful gauge info for this type of cell is current, voltage, temperature and passed charge. All other Impedance Tracking data is meaningless for a primary cell with flat OCV. + +Thank you. Yes, we have the capability to write our own driver to track the passed charge. Would it be possible to get valid PassedCharge() readings without ever enabling the IT algorithm? That way QEN would not be set, and in turn QMax would never be updated? + +Hello Sarah, I think this has been tried before. You may want to test this on an EVM. I don't know if there's a global 5 hour reset time for the gauge even without QEN. When Dominik gets back next week, I'll check with him on this. + +Thank you, please let me know any additional information you find out + +The QMax timer will expire after 5 hours in relax regardless of IT_ENABLE status. You'll have to write code on the host controller / driver to accumulate all passed charge. The gauge will eventually reset the passed charge counter based on relax conditions / timing. + diff --git a/data/text/DLP3/898550 b/data/text/DLP3/898550 new file mode 100644 index 0000000000000000000000000000000000000000..21bf45bddc1b0c918759ebda2eb69a9658db738d --- /dev/null +++ b/data/text/DLP3/898550 @@ -0,0 +1,14 @@ +BQ24650: intermittent charging + +Part Number: BQ24650 Hi there, I'm working on a charger for one of our products and I'm having issues with the BQ24650. The input to this device is a 9V wall wart going into VIN, instead of a solar panel output. the mosfets I am using are NVTFS5C471NLWFTAG and the inductor is ETQ-P8M4R7JFA The battery is a CAM72F (https://www.evwest.com/catalog/product_info.php?products_id=301) For MPPSET I did not populate R7 and used a 10k resistor for R3, so MPPSET should be pulled up to 9V and thus will always be on, correct? When I attempt to charge the battery, the device works intermittently. I.e. it charges for 5 seconds and then turns off for 5 seconds. When I put an oscilliscope at the input I notice that its very noisy and rises slowly until it turns off, so I assume that its reaching the overvoltage cut off value. I'm just not sure why this would be happening, so any help would be greatly appreciated Also, I replaced the 10k NTC at R4 for a fixed resistor that sets the voltage within the range specified in the datasheet, so I dont believe its anything temperature related. Thanks + +Hi Isaac, MPPSET is the setpoint at which the charger will enter its input voltage regulation loop. When using solar panels you are meant to set it at 80% of OCV so that the input voltage gets regulated at the point, which usually corresponds to the maximum power point. Not meant to be set at your input voltage. + +But since Im not using solar panels, does it matter? Do I still need to set it at 80% of the maximum input voltage? + +When you enter the input voltage regulation loop, the charge current will be decreased to maintain the input voltage at that point. When you have input current it will cause a small voltage drop (cables from supply to board/EVM, trace impedance) before being sensed by the IC at VCC, which means that odds are you aren't sourcing exactly 9V on VCC of the IC. So if you have your setpoint at your input voltage, the charger will keep trying to regulate the input current to reduce the voltage drop so that the MPPSET voltage is maintained. The solar panel is an example of how MPPSET/input voltage regulation is meant to be used, and not that this feature is only meant to be used with solar panels. A sanity check would be to check STAT1 STAT2 status when you see that there is no charging. If STAT1 is lit, the just change the MPPSET threshold lower, as this is indicating charge in progress and that there is no fault, meaning you are most likely entering and exiting the MPPSET loop cyclically. If neither STAT1 or STAT2 are lit, then there is a fault condition and it will change my assumption. + +Just tried it and neither are lit + +Please capture VCC, SRN, STAT1 and PH on a waveform and capture the intermittent charging. As we are entering a fault condition this will give us more information. + diff --git a/data/text/DLP3/898551 b/data/text/DLP3/898551 new file mode 100644 index 0000000000000000000000000000000000000000..3bc6b7a93ef7113e44d3393d9f5a8587aba1bb3c --- /dev/null +++ b/data/text/DLP3/898551 @@ -0,0 +1,12 @@ +IWR6843ISK: 68XX Long Range People Detection - What is the visualizer used in the Overview? + +Part Number: IWR6843ISK The 68XX Long Range People Detection lab runs fine, and we get a 3d plot from the visualizer tool when setup per the user guide, however what we would like to see is the output as shown in the Overview section of the userguide. This appears to show a realtime pointcloud output along with a cumulative point cloud output and gating / association data... what visualizer is this that is being displayed? + +Hi Ryan, Unfortunately, this visualizer does not work with real time data. The data output format of the device is described in the user's guide, you can use that to add a cumulative plot to the gui. Regards, Justin + +Hi Ryan, Is this the GUI you are asking about? Let me look into this. Regards, AG + +Yes, this is the visualizer I'm looking for + +Hi Ryan, We have a similar visualizer included in the older toolboxes - see toolbox 3.6.2. You will still have to add a cumulative point cloud. Regards, Justin + diff --git a/data/text/DLP3/898565 b/data/text/DLP3/898565 new file mode 100644 index 0000000000000000000000000000000000000000..0fb6e6977260e013cf31b12f74ca969ec703dd50 --- /dev/null +++ b/data/text/DLP3/898565 @@ -0,0 +1,8 @@ +CSD86360Q5D: Recommended Driver IC + +Part Number: CSD86360Q5D Hello, In the recommended applications there is a driver IC shown next to the CSD86360Q5D. Doescompany have a device that fits this roll that can be powered by a 3.3V PWM signal? The reference design has uses the TPS40322. However the application has us using a particular Infineon controller, as the load is an AMD SVI2 based processor. The controller outputs a 3.3V PWM signal that our "Driver IC" would convert to the upper and lower gate controls. Essentially the sample TPS40322 device is too complex and we need a simpler gate-driver circuit, an 8-pin device like what is shown in the datasheet would be excellent. Thanks, Talon + +Hi Talon, Thanks for the inquiry. I'm am the applications engineer forcompany discrete FETs and power blocks (like the CSD86360Q5D). I am going to have to redirect this to the appropriate product line. Are you looking for a gate driver IC such as the TPS51604 or a PWM controller with integrated gate drivers? I'm assuming your application is a synchronous buck converter. Is it a single phase or multiphase converter? These questions will help me determine the appropriate product line to send your inquiry. + +Thanks for the quick response John, it is for a synchronous buck converter. We are stepping down a 12V input to our card down to a SVI2 controlled 0.7V-0.9V. Our plan is to use two of these in dual phase to power the main rail, and another to power a secondary VDDCI rail. Normally we would use a uModule for something like this, but the AMD processor we are powering uses a proprietary interface, SVI2. The controller, the IR3567B, takes in the SVI2 bus signals (similar to an IIC bus), and outputs several PWM signals that can be used by gate driver ICs to switch the FETs. It also has current and voltage sense inputs so that it can properly control the voltages. So we have two of the three parts identified for the system, the controller (IR3567), the FETs (CSD86360Q5D), and need the intermediate gate driver IC that can convert our PWM signals to the corresponding high and low side gate controls. The TPS51604 looks promising, thank you for that recommendation. + diff --git a/data/text/DLP3/898568 b/data/text/DLP3/898568 new file mode 100644 index 0000000000000000000000000000000000000000..bdfeb96ef9c64c4b77f8495d31d9262a66488847 --- /dev/null +++ b/data/text/DLP3/898568 @@ -0,0 +1,6 @@ +BQ76PL455EVM: Cell Balancing commands + +Part Number: BQ76PL455EVM Hi, I am controlling the BQ76PL455A-Q1 EVM through the TMS320F28379D launch pad. I am trying to performing balancing by sending balancing commands to the required cells(Similar to GUI - Balancing enable for those cells that need balancing). I using Simulink to control the EVM via the launchpad. The software reference design does not have any examples for passive balancing commands as it dies for other scenarios. Can you please share some documents/commands that I can you for balancing each cell individually? + +Hello User, If you can successfully use GUI to enable cell balancing on EVM, then it should be the problem of your source code. Please refer to section 7.3.7 Passive Balancing. The squeeze (OWD) function must be disabled for correct balancing operation by setting TSTCONFIG[EQ_SQUEEZE_EN] = 0. If CBCONFIG[BAL_CONTINUE] is set to '0', then when there is a FAULT the bq76PL455A disables balancing. The CBENBL register bits clear to indicate this event. BAL_CONTINUE = 0: CBENBL is set to 0 and balancing is disabled until the fault and fault status bits are cleared. Information about what was being balanced is discarded. No change is made to the BAL_TIME bits in CBCONFIG. The CBENBL register must then be rewritten with the desired balancing action. BAL_CONTINUE = 1: There is no effect on CBENBL and CBCONFIG and any balancing in progress continues. Thanks! Andy + diff --git a/data/text/DLP3/898579 b/data/text/DLP3/898579 new file mode 100644 index 0000000000000000000000000000000000000000..15ae31068a0344e2e8a05de9648f288ae802bff0 --- /dev/null +++ b/data/text/DLP3/898579 @@ -0,0 +1,6 @@ +TPS6594-Q1: Linux Driver + +Part Number: TPS6594-Q1 Hi Team, This might be a stretch but my customer is looking for an associated firmware driver for the TPS6594-Q1 that they can run on Linux / RTOS style. Is this something we have? Thanks, Mitchell + +Mitchell, This is under development and not currently available. Regards, Chris + diff --git a/data/text/DLP3/898582 b/data/text/DLP3/898582 new file mode 100644 index 0000000000000000000000000000000000000000..798f369b23aa9ab4d13f4dcf705e7a0096773921 --- /dev/null +++ b/data/text/DLP3/898582 @@ -0,0 +1,6 @@ +PID UV Krypton Bulb High Voltage Power Supply + +I am designing a flyback topology supply to power a PID UV krypton bulb. The supply is designed to ramp up to 1400VDC for bulb ignition, and then lowers the voltage (~700VDC) to become current controlled (0.5mA). I have attached a spec sheet for similar bulbs for reference, ours is most similar to the PKS 106. This is very similar to powering CCFL but DC is required rather than AC. Could you comment on whether there is a better suited topology and also recommendcompany parts that might be suitable for this design? I have a design in progress with an ADI part, but am running into trouble with flyback transformer specs. Thank you, Stephanieheraeus_pid_lamps.pdf + +Hi Stephanie, Sorry we don't have the related devices and designs for this application area. I am not familiar with this Photoionisation Detector Lamps, if you can provide the detail spec, the topology, or a ready released design solution, maybe then I can recommend a device. Regards, Teng + diff --git a/data/text/DLP3/898591 b/data/text/DLP3/898591 new file mode 100644 index 0000000000000000000000000000000000000000..fade313c8edd5ac49a2294e3f768b8f5d442b376 --- /dev/null +++ b/data/text/DLP3/898591 @@ -0,0 +1,6 @@ +LM3880 + +Hi, I want to insert a voltage divider at the EN validation input of the LM3880 sequencer. To do this, I need the maximum value of the resistances of the divider? This was not mentioned in its datasheet. Thanks. + +Hi There is 7uA current source at EN pin, please consider this when sizing the resistor Vccenable=1.22V[1+(Ren1/Ren2)] - 7uARen1 Regards Yihe + diff --git a/data/text/DLP3/898599 b/data/text/DLP3/898599 new file mode 100644 index 0000000000000000000000000000000000000000..a16940f02ec45cbef02cf5ef283dd6924fc314b1 --- /dev/null +++ b/data/text/DLP3/898599 @@ -0,0 +1,6 @@ +BQ25898D: About AUTO_DPDM function + +Part Number: BQ25898D hello, An interrupt is output by USB / adapter source identified. Interrupts are output due to various factors. Where does USB / adapter source identified mean which register should be checked? If I check with VBUS Status register, how should I distinguish the result detected in the past from the result detected by AUTO_DPDM function? best regards + +Hi, Referring to 9.2.3.3 Input Source Type Detection on the d/s, After input source type detection, an INT pulse is asserted to the host. In addition, the following registers and pin are changed: 1. Input Current Limit (IINLIM) register is changed to set current limit 2. PG_STAT bit is set 3. PG pin goes low (bq25898) When AUTO_DPDM_EN is disabled, the Input Source Type Detection is bypassed. The Input Current Limit (IINLIM) register, VBUS_STAT, and SPD_STAT bits are unchanged from previous values. Thanks, Ning. + diff --git a/data/text/DLP3/898601 b/data/text/DLP3/898601 new file mode 100644 index 0000000000000000000000000000000000000000..b5c94ecf5fc44735a3187848affca0436bf76762 --- /dev/null +++ b/data/text/DLP3/898601 @@ -0,0 +1,6 @@ +LM5116: Forward Crossing Phenomenon in Bolt Plot + +Part Number: LM5116 Hi Team, Can you please make comments for below questions? Below is the screenshot of bode plot from customer side. The system working condition is: Vin= 58V, Vout=48V, Iout<=0.2A. Customer found there is forward crossing, which is abnormal and unfamiliar for them. Do you think this abnormal forward crossing indicates system is instable or not, and why? If yes, are there something customer can do to improve system stability? B&R Stanley + +Hi Stanley, Do you mean the forward cross at about 80KHz? What's switching freq of LM5116? normally only need to scan freq range below Fsw /2. is it working at Fully Sync mode? LM5116 is controller, circuit may works at DCM mode if load <0.2A. customer need to test loop response at CCM mode. B R Andy + diff --git a/data/text/DLP3/898619 b/data/text/DLP3/898619 new file mode 100644 index 0000000000000000000000000000000000000000..da01380568608de300356d6d3eeb9461e8971bd8 --- /dev/null +++ b/data/text/DLP3/898619 @@ -0,0 +1,18 @@ +BQ25898: BQ25898 + +Part Number: BQ25898 Hi, I am trying to validate the charger Bq25898 used in one of our design. This device is connected to BMS tool through I2C interface of 1.8V logic. After the connection checked the Device ACK is OKAY from BMS tool. The EV2400 emulator was connected. During the device selection I have chosen "bq25898.bqz" file. But in the window it shows as "bq24298 Default view" Not sure whether its still okay. When I read the register values its reading only the default values, not seeing any appropriate load current values. I have the following questions., 1. Does EV2400 supports "Bq25898" device ? 2. When load the charger configuration for "bq25898" why it shoes as"bq24298 default view" although on top it still shows as "Bq25898.bqz" 3. Why the register read values are not appropriate or not updating according to my input charger current or output load current increases? 4. I am looking for the following registers, can you please let me know the exact register number to read them? a: Input charge current register b. Output discharge current register. c. Charge current regulation. Thanks, Harikrishnan + +Hi Harikrishnan, The EV2400 I2C output lines are internally pulled up to 3.3V I have never tested with two different voltage level pull ups on the I2C lines. Regarding 1 and 2, the BQ24298 tab headers are a typo. The BQ25898.bqz supports the device. Regarding 3, if you select Field View (far right) and then click Read Register and not have Device ACK Error as below, the registers should update. Regarding 4, input current register is REG00, charge current register is REG04, control of output discharge current is not an IC feature. There is an over discharge current clamp that has a fixed value. If you use Field View, you do not need to know the register numbers. Regards, Jeff + +Hi Jeff, I had gone through the schematics of EV2400 emulator. As per the design, it supports all the I2C logic level. Because the design can be I2C specification compatible like 1.8V/2.5V/3.3V. Since I2C is open-drain based specification, so the designer has a choice of connecting the pull-up with any of these logic levels. I had checked the reference design of EV2400 as well and its logic is defined based the logic level read from the SDA and SCL lines from the DUT. You may be double confirm from your end. My DUT interface is currently connected to 1.8V. So in my understanding that should not be a problem. I have also able see "DEVICE ACK OKAY" when i connect the EV2400 with my DUT. My concern is why the register values are not getting updated when I read from the register? Thanks, Harikrishnan + +Hi Jeff, In addition, I have also probed the SDA and SCL signal after connecting the EV2400 and found that signal quality is fine and it stays at 1.8V logic level. There is no logic conflict. The device address is also fine for this device. Please let me know your thoughts. Thanks, Harikrishnan + +Harikrishnan, did you disable the watchdog timer? If not, the registers reset to defaults after the timer expires. Jeff + +Hi Jeff, Can you please let me know more on this watchdog timer? Do you mean there is some option from BMS tool to disable the watchdog timer of bq25898? I am not sure if there is a watchdog timer exist on this device. Please elaborate. Thanks, Harikrishnan + +Harikrishnan, All of our chargers have a watchdog timer bit (REG03b6) that the host must write to before it expires. If not the registers reset to default as a safety feature. You can change the timer expiration time or disable using REG07b4:5. Regards, Jeff + +Hi Jeff, Thank you for the register details. I need to check on this from my Firmware team on the watchdog register value. On the quick check even if the watchdog timer was not disabled it should reflect the current value for 40 Sec (default timer). Which is huge time for human to see the values getting changed and reset to default value after 40 sec. But in my case the values are not getting updated at all. It stays some default value irrespective of the input current change or the Load current change. I am not able to attach the screen shot of register read values at this place. Thanks, Harikrishnan + diff --git a/data/text/DLP3/898629 b/data/text/DLP3/898629 new file mode 100644 index 0000000000000000000000000000000000000000..295b4af1f86717193beac5ac5f5ff7b2a54c4c00 --- /dev/null +++ b/data/text/DLP3/898629 @@ -0,0 +1,6 @@ +TPS2514: Use questions + +Part Number: TPS2514 Our company now uses the tps2514dbvr chip. Now in the process of using it, we find that it can support Android phones when charging mobile phones, 但是不能支持苹果手机充电. But it can't support Apple mobile phone charging（IOS） 请问一下：这款IC原理上支持苹果手机吗？是否需要苹果授权之类？理论上是否现在支持苹果等手机充电， Excuse me: does this IC support Apple phones in principle? Do you need an apple license or something? In theory, does it support charging of mobile phones such as apple, 是不是以后都没有问题？不管是否出现新款的手机或IOS系统。 Is there no problem in the future? Whether or not there is a new mobile phone or IOS system. 另外再问一下：TPS2514ADBVR和TPS2514DBVR这两个料有些什么区别？ What's the difference between tps2514adbvr and tps2514dbvr? + +Hello, Yes, the TPS2514 supports the apple divider charging schemes. To determine which divider mode is negotiated, you must measure the voltage on DP/DM. If apple continues to support their legacy charging in their new phones it should not be a problem. However, if they do change their charger detection, then yes that would be a problem but there would be no way for us to know or control that. + diff --git a/data/text/DLP3/898635 b/data/text/DLP3/898635 new file mode 100644 index 0000000000000000000000000000000000000000..d5490011610a6a5b0c470ed6ef495dbd187172d4 --- /dev/null +++ b/data/text/DLP3/898635 @@ -0,0 +1,6 @@ +BQ25710: Pass through mode entry and exit + +Part Number: BQ25710 Device will be transition from normal Buck-Boost operation to PTM operation by: ? Set REG0x31[7] = 0, to disable the EN_EXITILIM. ? Set REG0x30[8] = 1. ? Set REG0x30[2] = 1. ? Ground ILIM_HIZ pin. Device will transition out of PTM mode with host control by: ? Set REG0x30[2] = 0. ? Pull ILIM_HIZ pin to high. ? Device exits PTM to buck-boost operation if tripping VinDPM. ? Device exits PTM to buck-boost operation under fault conditions (for examples ACOC, TSHUT, BATOC, BATOV). 1、According to the above from datasheet, need host a GPIO control to change ILIM_HIZ PIN low or high to eanble or disable PTM Mode? Can BQ25710 control this PIN by setting reg? 2、Should the charge bat function be enable during PTM mode? Ps: system input 19V，Bat 4cell。 + +Hi, there, 1. You need to pull the ILIM_HIZ pin to ground by a GPIO or a jumper. 2. It is not suggested to charge the battery during PTM mode. + diff --git a/data/text/DLP3/898637 b/data/text/DLP3/898637 new file mode 100644 index 0000000000000000000000000000000000000000..51b55298e89a82861ddeceb030f0194e2f395b91 --- /dev/null +++ b/data/text/DLP3/898637 @@ -0,0 +1,18 @@ +TPS610982: Input capacitor short failure + +Part Number: TPS610982 Dear team, My customer are using TPS610982 at their application. but there is some issue. If the input capacitor(C27,28,29) is shorted to GND due to crack or something, Can this give a damage to the device like leakage current? I think the reverse current would give a damage to internal switch under input short status. what do you think? Thank you. + +Hi Dino: Firstly, please allow me check if the battery is still connected when Vin shorted? + +Hi Dino: About your question, the IC won't damage if just short the VIN to ground. But I afraid the power supply will damaged. + +Hi Minqiu, Thank you for your reply. Do you mean the IC won't damage if just short the VIN to ground although the battery is still connected? If the VIN(battery) is suddenly short to GND during operation, I am concerned about damage by reverse current. Let me know your opinion. Thank you. + +Hi Dino: The High side FET will turn off once detect reverse current. And if the Vout drop a lot, the converter will disable, and all FET turn off. There is no route for reverse current. And the leakage current is small and won't damage the IC. + +Hi Minqiu, Thank you for your help. To clarify, "And if the Vout drop a lot, the converter will disable, and all FET turn off." ==> Vout drop??, do you mean Vin drop? due to short the VIN to ground. Is it right? Thank you. + +Hi Dino: If the Vin is short to ground, it can't supply the load anymore. So the Vout will drop, and cause the IC back to start. (Sorry, I shouldn't call it disable before) Is there any power supply for Vout? + +Hi Minqiu, There is no additional supply for Vout. There is only Vin(VBAT) connected battery. Thank you for your opinion. The customer wanted to know if Vin is short to GND could cause IC damage(leakage current).Your reply was very helpful. I will reply to the customer as follows. "The IC won't damage if just short the VIN to ground. But I afraid the power supply will damaged. Thank you. + diff --git a/data/text/DLP3/898646 b/data/text/DLP3/898646 new file mode 100644 index 0000000000000000000000000000000000000000..b01cd8413e07c9d1fe3051305a26b2d0b1095600 --- /dev/null +++ b/data/text/DLP3/898646 @@ -0,0 +1,6 @@ +LM5050-1: How to adjust Vgs? + +Part Number: LM5050-1 Hi experts, I want to adjust Vgs to 8V, Could you please suggest how to do this？ I tried to modify below R1, but no use. + +Hi Gate voltage of MOSFET is controlled by LM5050-1 based on the load current. At light load, gate voltage will be close to MOSFET Vth and at high load current, gate voltage will be high. This is due to the linear regulation control mechanism. It is not possible to fix the gate voltage to 8V at all conditions. If you wish to clamp gate voltage to 8V, you can add a zener clamp from gate to IN pin to clamp it to a known maximum value. Regards, Kari. + diff --git a/data/text/DLP3/898651 b/data/text/DLP3/898651 new file mode 100644 index 0000000000000000000000000000000000000000..72ae41490112e02664e2034681519c78619c4b16 --- /dev/null +++ b/data/text/DLP3/898651 @@ -0,0 +1,14 @@ +LM2596: Inductor Selection + +Part Number: LM2596 Hello team! I got the question about Inductor selection from the customer. Could you tell me how to select the inductor if the current is below 0.6A? For the reference, the power line is 24Vin to 5Vout/0.2A. WEBENCH recommended 330uH for this line. But I would appreciate if your team have any advice for inductor selection. Best Regards, Kazuki Kitajima + +Hello team, Sorry for posting again. But could you tell me one more thing about inductor selection? In the DS figure8, L38 section. Inductor would be 68uH/3.1A. I'm assuming the current value 3.1A is selected because of the margin. Is it okay to use an inductor which has lower current value in case of lower load current? The customer would try to use 68uH / 2.5A conductor for 1.67A line. Best Regards, Kazuki Kitajima + +Hi Kazuki, Pls follow the instruction on data sheet for inductor selection as the inductor and Cout value are critical for loop stability. LM2596 is over capability for 0.2A load current, the inductor also require high saturation current to work with a 3A converter even load is 0.2A. can customer try latest LMR33610 or TPS560430 ? B R Andy + +Hello Andy-san, Thank you for your reply. LM2596's inductor selection section looks different as the latest devices... The DS indicates that inductor value should be selected from the metrics in the DS which doesn't include below 0.6A. I understand this device is very old and we have better devices but I would really appreciate it if you would provide some advice for that. Also thank you for recommending those devices. I'm going to send an e-mail to you directly to explain the customer situation. Best Regards, Kazuki Kitajima + +Hi Kazuki, Pls select inductor based on 0.6A load current. If design inductor based on 0.2A load current, it maybe 3X bigger than 0.6A load condition, the too big inductor will cause loop stability issue. B R Andy + +Andy-san, Thank you for your reply! I'll tell the customer to refer to the 0.6A point in the figure. Best Regards, Kazuki Kitajima + diff --git a/data/text/DLP3/898657 b/data/text/DLP3/898657 new file mode 100644 index 0000000000000000000000000000000000000000..2b09623a038e7cff6a64f27ba32680f538f52156 --- /dev/null +++ b/data/text/DLP3/898657 @@ -0,0 +1,6 @@ +TPS51604: Output drive current + +Part Number: TPS51604 Dear all. Would you please teach me about DRVH and DRVL output current of TPS51604? Regards, PAN-M + +Hi PAN-M, The sourcing and sink resistance of gate drive is available in spec table on datasheet page 4. The sourcing and sink current can be calculated as (VDD-Vgate)/Rgate For example, the typical sourcing resistance of DRVL is 1.5ohm, the VDD voltage is 5V, the initial gate voltage is 0V. Then the initial sourcing current is (5V-0V)/1.5ohm=3.33A. With gate voltage increases, the sourcing current decrease. Thanks Qian + diff --git a/data/text/DLP3/898660 b/data/text/DLP3/898660 new file mode 100644 index 0000000000000000000000000000000000000000..33fb835fb8b5d4d8781afd4395439beecf78b7d8 --- /dev/null +++ b/data/text/DLP3/898660 @@ -0,0 +1,6 @@ +LM3410: Drive high-current LEDs through the LM3410 + +Part Number: LM3410 Dear Sir, I have a project need 1000 lm or more. My setting conditions are as follows: LED : OSRAM LED (Vf 2.7V-3.0V / If 700mA ). LED Q'ty : 4 pcs LED / 1 serial (the voltage is 10.8V-12V and the current is 700mA). Power : Li-poly battery (3.7V / 5000 mA). Dimming : PWM signal from Arduino. If I use LM3410 to drive it, is it ok ? If not, please give me some suggestion. Thank you. + +Hello Wesley, This will exceed the peak switch current minimum of 2.1A. At 3.7V input, 12V output at 700 mA the average on time current of the LM3410 would be 2.35A. This is including 0.4V for the boost diode. This does not include current ripple or efficiency. This part doesn't quite have the capability you are looking for especially if your input voltage can drop. You can try it knowing this limitation. Note that your design will need low inductor current ripple and will need good heatsinking for the LM3410. We don't have a part for low input voltage and higher output power like this. Best Regards, + diff --git a/data/text/DLP3/898664 b/data/text/DLP3/898664 new file mode 100644 index 0000000000000000000000000000000000000000..bf89eee45d1373e34177f754a2f0ac55cdd8a458 --- /dev/null +++ b/data/text/DLP3/898664 @@ -0,0 +1,12 @@ +The charge cycle + +Part Number: BQ24105-Q1 Hi TI-team My customer have question. /support/power-management/f/196/p/881153/3269081#3269081 Regarding the answer to the above URL. What does "the charge cycle (and in this part's case, the entire state machine) "mean ? What is the harmful effect of being reset ? Best Regards, Koji Hayashi + +Dear Koji, The charger follows a specific algorithm about when to start charging based upon the state of the battery and various other conditions specified in the datasheet. The state machine refers to the algorithm. What reset are you talking about specifically? Thanks, Mike Emanuel Please click "This resolved my issue" button if this post answers your question. + +Hi Mike-san Thank you for quick response. Is there a description in the data sheet about "algorithm" ? >What reset are you talking about specifically? ”it resets the charge cycle (and in this part's case, the entire state machine)" What are the harmful effects of the above resets ? Best Regards, Koji Hayashi + +Koji-san, The operational flow chart on page 10 of the datasheet describes the state machine in detail. Toggling the CE pin will reset the state machine. Thanks, Mike Emanuel Please click "This resolved my issue" button if this post answers your question. + +Hi Mike-san Thank you for quick response. I understand. I will answer to my customer. Best Regards, Koji Hayashi + diff --git a/data/text/DLP3/898667 b/data/text/DLP3/898667 new file mode 100644 index 0000000000000000000000000000000000000000..737ca74431e07e59344b6ba33563d995001ef344 --- /dev/null +++ b/data/text/DLP3/898667 @@ -0,0 +1,16 @@ +LDC2112: Minimum Gap between Inductive sensing and PCBA’s IC + +Part Number: LDC2112 Dear Sir, I updated our product structure, please see attached JPG file. We have two questions about the LDC2112 design that show as below, please help confirm. 1.The Minimum Gap between Inductive sensing and PCBA’s IC. We have used ferrite sheet, what is the minimum distance between PCBA’s IC and sensor coil? Are there related documents mentioning the conditions for our design? Can you provide a suggested distance. 2.How to choose the material and thickness of Ferrite? Are there any relevant documents for reference? Or provide the recommended material. B.R. Ken + +Dear sir, Update the questions, We have 4 questions about the LDC2112 design that show as below, please help confirm. 1.The Minimum Gap between ferrite sheet and PCBA’s IC. We have used ferrite sheet, what is the minimum distance between PCBA’s IC and sensor coil? 2.The Minimum Gap between Inductive sensing and PCBA’s IC. We don't have used ferrite sheet, what is the minimum distance between PCBA’s IC and sensor coil? Are there related documents mentioning the conditions for our design? Can you provide a suggested distance. 3.How to choose the material and thickness of Ferrite? also check the Permeability VS Frequency? Are there any relevant documents for reference? Or provide the recommended material. B.R. Ken + +Hello Ken, Thank you for your post. Our expert Engineer will get back to you very shortly on this. + +Hi Ken, Questions 1 and 2 are primarily mechanical questions. I don't have an exact number to give you, but I can give you guidelines to think about: The sensor coil should move as little as possible. FPC sensors should have a support structure and a stiffener to immobilize the sensor coil as much as possible, especially during button presses. The button response will be reduced if the sensor moves away from the coil during a button press, and this can lead to long-term reliability issues. From a mechanical standpoint, you only need enough space so that the sensor coil and its support structure will not touch the ICs, including manufacturing tolerances. From an electrical standpoint, the sensor coil will be radiating an electromagnetic field at the sensor's resonant frequency. With the ferrite layer in between the ICs and the sensor, this radiation may not be an issue. I would not suggest placing sensitive ICs below the sensor without ferrite shielding. For question 3, we have this blog post that discusses ferrite shielding. I suggest browsing through similar products to see what thicknesses are available that could work for your stackup. The permeability information will be available in the product's datasheet. Finally, please note that you do need to have space for the metal target to deform, so the target cannot be touching the sensor coil. I realize that this may be a simplified drawing, but I just wanted to make it clear that there needs to be space between the target and coil. Best Regards, + +Hi Kristin, Yes, this is only a simplified drawing, we have noticed this space for the metal target to deform. About electromagnetic field, do you mean that the electromagnetic field generated by the sensor coil will affect the sensitive ICs on the PCBA? Best Regards, Ken + +Hi Kristin, About electromagnetic field, do you mean that the electromagnetic field generated by the sensor coil will affect the sensitive ICs on the PCBA? or the sensor coil affected by other devices? Best Regards, Ken + +Hi Ken, It's more likely that the sensor coil's radiated field could impact the ICs. If they are not sensitive to the sensor frequency, then it may not be an issue, but it is safer to keep the ICs away from the coil. Unless the ICs are radiating a frequency within the narrow pass-band of the LC tank, they should not impact the sensor. Best Regards, + diff --git a/data/text/DLP3/898669 b/data/text/DLP3/898669 new file mode 100644 index 0000000000000000000000000000000000000000..1517fdab5c6745d589cdb12cd30b72e45f34b590 --- /dev/null +++ b/data/text/DLP3/898669 @@ -0,0 +1,8 @@ +BQ24105-Q1: Precharge Charging Time + +Part Number: BQ24105-Q1 Hi TI-team. My customer's perception, the precharge charging time is 1440s to 2160s regardless of the capacitance value of the TTC pin capacitor. Is this perception correct ? Best Regards, Koji Hayashi + +Koji, TTC affects the charge timer only. The precharge timer is a fixed specification. Thanks, Mike Emanuel Please click "This resolved my issue" button if this post answers your question. + +Hi Mike-san Thank you for quick response. I understand. Best Regards, Koji Hayashi + diff --git a/data/text/DLP3/898678 b/data/text/DLP3/898678 new file mode 100644 index 0000000000000000000000000000000000000000..d0a0838e003bf1a1187633ce2bae54b5f1f0d725 --- /dev/null +++ b/data/text/DLP3/898678 @@ -0,0 +1,12 @@ +BQ24105-Q1: Discharging while charging + +Part Number: BQ24105-Q1 Hi TI-team. My customer have question. Can the BQ24105-Q1 discharge the battery while charging? Best Regards, Koji Hayashi + +Dear Koji, The battery is a two terminal device. Current either goes in (charging) or charge current comes out (discharging). Thanks, Mike Emanuel Please click "This resolved my issue" button if this post answers your question. + +Hi Mike-san Thank you for quick response. Does this mean that the IC can discharge the battery while charging ? Best Regards, Koji Hayashi + +Koji-san, The IC cannot both simultaneously discharge the battery and charge the battery. Both of these states are mutually exclusive. In fact, there are three basic states: charging, discharging, and not charging. You cannot be in more than one of these states at a time. Thanks, Mike Emanuel Please click "This resolved my issue" button if this post answers your question. + +Hi Mike-san Thank you for quick response. We will answer to my customer. Best Regards, Koji Hayashi + diff --git a/data/text/DLP3/898681 b/data/text/DLP3/898681 new file mode 100644 index 0000000000000000000000000000000000000000..a2675b28c94255d8e6d80f5abc4c3eee22354964 --- /dev/null +++ b/data/text/DLP3/898681 @@ -0,0 +1,6 @@ +TPS65287: TPS65287 + +Part Number: TPS65287 Dear, Mr I didn't find the maximum input current of the TPS65287 in the data sheet. Please, advise. I'm going to use the TPS65287 in mode: - Vin =+12V; - Vout1=+3.3V (about 3A); - Vout2=+5V (about 2A); - Vout3=+10 (about 1.5A). Is it right? Best regards. Vladimir + +Hi, Vladimir I afraid TPS65287 cannot support your application. The big concern is IC's temperature. Below is package dissipation, at 25C, IC only can bear 3.33W. For 3.3Vout1, assume the Eff is about 90%, then the Pd=1.1W. For 5Vout2, assume the Eff is about 85%, then the Pd=1.76W. For 10Vout3, assume the Eff is 75%, then the Pd=5W. The total Pd=7.86W, which will cause IC triggers over temperature protection. + diff --git a/data/text/DLP3/898684 b/data/text/DLP3/898684 new file mode 100644 index 0000000000000000000000000000000000000000..eb09024f14f655e84116bc8667b5ef62ffb1b86c --- /dev/null +++ b/data/text/DLP3/898684 @@ -0,0 +1,8 @@ +LMR14050: LMR14050: Part getting too hot. + +Part Number: LMR14050 So I am thinking maybe I need to go to a higher power part, but just want to check if there is anything I can do otherwise. I have a design that takes in 20V from a battery and drops it down to 12V to a 3.5A blower fan. So the part is getting very hot and I was thinking I wasn't that close to the 5A max, but maybe because of the voltages I am using it dissipates too much power. I also only have a 2 layer board and didn't realize they were assuming you use 4 layers. Layout. + +Hi, The PCB layout design is not optimized for thermal, even a 5A regulator will also be very hot with this design: Pls arrange it as below if you want to re-design it: + +Thank you i make those changes on my next prototype and I was looking at maybe adding a heat sink to the back side for good measure. + diff --git a/data/text/DLP3/898695 b/data/text/DLP3/898695 new file mode 100644 index 0000000000000000000000000000000000000000..31ac33732572c85b6f2b6270218ce04a1e9b91b8 --- /dev/null +++ b/data/text/DLP3/898695 @@ -0,0 +1,10 @@ +TPS2372: PMP21115: Non Isolated DC DC converter + +Part Number: TPS2372 Hi, In the reference design PMP21115, can a non isolated DC DC converter be used instead of an isolated one? What is the selection criteria for power converter topology while using POE? + +Hello Akash, PoE can be nonisolated, and we have several reference designs that are non isolated. The PMP21115 design is a dual PoE with smooth transition, which is a more complex design beyond just the DC-DC design. The topology criteria is more related to the overall system. Typically we see flybacks, bucks and forward designs, hence our reference designs mainly fall under these. Topology depends on if the system needs to be isolated, the output voltage/power level, and cost vs size vs efficiency prioritization. Isolation is up to the customer, if they think their end equipment needs to be isolated for end user safety and device safety. Typically, if the device is something a person is going to be touching (ie a phone or something with buttons) we recommend isolation. If it is something like lights on the ceiling, which no one will be touching while they are powered, non isolation can be used. If you are unsure, we recommend isolation since that is safer for both the user and the device. If this post answers your question, please indicate so by marking this thread as resolved. Thank you. Regards, Michael P. Applications Engineer customer organization + +Thanks Michael. Does earthing the product frame/chassis ground has an impact on POE operation? (Assuming the shield ground and chassis ground are connected) + +Hello Akash, The following paper discusses this at length in section 1.9: If this post answers your question, please indicate so by marking this thread as resolved. Thank you. Regards, Michael P. Applications Engineer customer organization + diff --git a/data/text/DLP3/898696 b/data/text/DLP3/898696 new file mode 100644 index 0000000000000000000000000000000000000000..f9a33faa8986d7a4f957426e57e1189cee839315 --- /dev/null +++ b/data/text/DLP3/898696 @@ -0,0 +1,14 @@ +BQ40Z50-R1: BQ40Z50_R1 SOC problem + +Part Number: BQ40Z50-R1 We Use BQ40Z50R1 for 4s LifePO4，After aging, our battery has a charge of 80%, but after standing for a period of time, the SOC of some batteries will become 95%, and some will become 75%, most of which are 80%, and the problematic ratio is 20%. We made ID and mass production documents according to the requirements。What is the problem and how to solve it？ We make the ID on GPC ,our ID is 457: DOD error is 7.44%. + +Could you provide a bqStudio log file and your srec file? In addition, have you guys done the learning cycle? Thanks. Andy + +we have done the learning cycle，attach the gg file.The problem is randomly occurring，I can’t get the log file when the problem is occurring. For problematic batteries，We do a learing cycle，Battery return to normal，I am not sure if there will be an exception。 1245_0531.gg(2).csv + +Without a good bqStudio log file, it is almost impossible to figure out what the root cause is. I would suggest you try to get a bqStudio log file. Andy + +please help us check the gg file ，what problem with our gg file Configuration can cause is.7282.1245_0531.gg(2).csv + +I took a quick look. The gg file seems okay. In addition, you should have completed the leaning cycle successfully and therefore your settings should be fine. Please share a bqStudio log. Andy + diff --git a/data/text/DLP3/898704 b/data/text/DLP3/898704 new file mode 100644 index 0000000000000000000000000000000000000000..b4e9bfc0573183fb0cd3b3f7db13b84d1fe4406c --- /dev/null +++ b/data/text/DLP3/898704 @@ -0,0 +1,10 @@ +BQ40Z50: bq40z50 + +Part Number: BQ40Z50 Hi Sir, Would you pls help for information as below, thanks. 1. OVP/UVP Delay Time 2. OCCP/ODCP Delay Time 3. Short Delay Time Thanks, Ian. + +Hi Ian, What do you want to know about these parameters? Thanks. Andy + +Hi Andy, That's all what customer request. Thanks,Ian. + +Hello Ian, These are described in the TRM in the protection section. Please refer customer there. + diff --git a/data/text/DLP3/898717 b/data/text/DLP3/898717 new file mode 100644 index 0000000000000000000000000000000000000000..13e5abeeb854fa64acc5d5c161b86f5853673a99 --- /dev/null +++ b/data/text/DLP3/898717 @@ -0,0 +1,20 @@ +UCC27511: max. junction temperature + +Part Number: UCC27511 Hi Team, My customer would like to know UCC27511 max junction temperature spec. Would you please help for it? Or can I assume and use 150°C for the Tj max. Note. From datasheet that one list the recommend Operating junction temperature range is –40°C to 140°C and Tstg is –65°C to 150°C. Best regards, Albert Lee. + +Hello Albert, Please refer to Table 7.3 Recommended Operating Conditions and 7.1 Abs Max table in the datasheet. Regards, -Mamadou + +Hi, Albert, I got a weird email from the system. Did you need more help with this issue? Let Mamadou and me know if so! + +Hi Mamadou, thanks but can't find the table 7.3, and I know the recommended operating conditions is –40°C to 140°C which listed in 8.3 (page 7) and Tstg is –65°C to 150°C in 8.2 (page 7) as I previous mentioned . In 8.1 Absolute Maximum Ratings didn't have the max junction temperature information also. Best regards, Albert Lee. + +Hi Don Dapkus, It seems caused by E2E locked. Anyway, the datasheet you listed is UCC23511 but what I want have is UCC27511. Would you please check for it Or I can use 150deg.C as max junction temperature for UCC27511. Best regards, Albert Lee. + +Hi, Albert, I've asked Mamadou to follow-up with you on this question. Sorry for the confusion! + +Albert, As mentioned in previous email, please refer to the Tables in d/s below. /lit/ds/symlink/ucc27511.pdf I hope this addresses your question. Regards, -Mamadou + +Hi Mamadou, Thanks but can't it didn't have the max. junction temperature as previous mentioned. I know the recommended operating conditions is –40°C to 140°C which listed in 8.3 (page 7) and Tstg is –65°C to 150°C in 8.2 (page 7). But it's a recommended operating temperature not absolute max rating, isn't it? In 8.1 Absolute Maximum Ratings didn't have the max junction temperature information also. Can I use Tj max is 150deg.C for it? Best regards, Albert Lee. + +Albert, Please use 150C for max junction temperature. Regards, -Mamadou + diff --git a/data/text/DLP3/898720 b/data/text/DLP3/898720 new file mode 100644 index 0000000000000000000000000000000000000000..89420edef97a3a5351b0189f08750e9e7b723aea --- /dev/null +++ b/data/text/DLP3/898720 @@ -0,0 +1,6 @@ +UCC28780: Tips on transformer design + +Part Number: UCC28780 To all concerned I would like some advice on the transformer design when using the UCC28780. For high frequency switching (over 400kHz), we are thinking of using RM8 (corresponding to material N49) as the core. In fact, the ON Semiconductor NCP1568 application note recommends N49 (or ML29D) and shape is RM8. (I think the UCC28780 and NCP1568 are competing devices) However, there is one question. Both your evaluation board (UCC28780) and NCP1568 evaluation board directly take out the wire on the secondary side without using a bobbin. Why are you directly using the wire without using the bobbin? Is it because it cannot be cleared from the viewpoint of safety standards? Or is there another reason? Due to the small size of the core, it makes sense to use triple insulated litz wire. Please tell me any other useful tips for transformer design. Also, I will get all the pins from the bobbin. Do you need shielded wires? Considering Lp = 40uH, I feel that Ls = 3uH has a slightly larger leakage inductance. Is sandwich winding recommended? For now, I would like to use RM8 or EER25.　　 (200W / 32V / 85V to 276V, single output) B.R. Tak + +The secondary output with flying leads is mainly with consideration of size. If you are ok on size, it is no problem to put the secondary leads on bobbin. On transformer design in switching mode applications, can you find a book to read? There are also many articles. You find these tricks over there. There is no shortcut to handle the tricks with a few points. So please just go ahead to study a book as well as other published articles. + diff --git a/data/text/DLP3/898723 b/data/text/DLP3/898723 new file mode 100644 index 0000000000000000000000000000000000000000..47ae1f959f161eb86d0202da4bab93c112cf5db7 --- /dev/null +++ b/data/text/DLP3/898723 @@ -0,0 +1,10 @@ +UCC28704: About encrypted models + +Part Number: UCC28704 Hello I was searching for a flyback controllar which have a spice model or something for simulation purpose. I found the device ucc28704 which have a pspice model. But when im going to import the model into TINA TI, it said "invalid device" at this line $CDNENCSTART. When i searched for that, i found that the "$CDNENCSTART" line has something to do with encryption. So. Is this means i cant use this in TINA TI.? Who make these models?. Can anyone give a TINAcompany model for this device. OR Can anyone suggest a PSR FLYBACK controller which have TINAcompany model. Thank you + +PSR flyback controller with TINA-TI model examples include UCC28700 and UCC28710. + +Thanks for the information There were several reference designs in those device pages. But when i click the design document link under KEY DOCUMENT heading, it downloads a document called test report which have nothing but test graphs. Full design detail document is nowhere to be found. For example /tool/PMP30428 Why is that happens. Where can i download the detailed design document. + +All design files are there. What else do you need? If you want to make design you can use the excel design tool. + diff --git a/data/text/DLP3/898724 b/data/text/DLP3/898724 new file mode 100644 index 0000000000000000000000000000000000000000..334907f5948102d9469ed05a46007bd7d8ec0674 --- /dev/null +++ b/data/text/DLP3/898724 @@ -0,0 +1,6 @@ +TPS62150A-Q1: Question about UVLO + +Part Number: TPS62150A-Q1 Hi team, My customer asked question about UVLO. Q.1) In Table.2, it describes "0.7 V < VIN < VUVLO". Does "0.7V" meand 0.7xVin, or simply 0.7V? Q.2) Customer want to toggle PG when Vin goes down to 6V. Is it possible to control PG threshold as required? Best regards, + +Fujihara-san, A.1) 0.7 V means 0.7 V (dc voltage) A.2) The power good function senses the output voltage, not the input voltage. You will need a separate supervisor circuit to monitor VIN. + diff --git a/data/text/DLP3/898732 b/data/text/DLP3/898732 new file mode 100644 index 0000000000000000000000000000000000000000..58edb5e866e68c2f1a877f37167ce656adb369ac --- /dev/null +++ b/data/text/DLP3/898732 @@ -0,0 +1,6 @@ +BQ78350-R1: R1 to R2 device programming for production + +Part Number: BQ78350-R1 I have the same problem as other users, I have to automate programing srec to update the R1 using the R2 firmware. Is the protocol for programming device firmware documented anyway? While it can be done from BQ studio I'd like to have this fully automated by our production test software. Is there a way to interact with BQ studio and EV2400 without operator intervention? This would be useful to automate loading defualt BQ78350 configuration and calibration data. Thanks for help, E. Carmisin + +Hi Enrico, I have some example code I can share with you for loading an srec file for this device. There is also an updater tool I can share that may be easier if you can call it from your production software. Send me a private message and I can share both software options with you. Thanks, Matt + diff --git a/data/text/DLP3/898737 b/data/text/DLP3/898737 new file mode 100644 index 0000000000000000000000000000000000000000..45df443e95582124c5c71ff9e3d83c65fbb5329b --- /dev/null +++ b/data/text/DLP3/898737 @@ -0,0 +1,6 @@ +BQ25895MEVM-664: BQ25895 Vs BQ25895 + +Part Number: BQ25895MEVM-664 What is the difference between the BQ25895 and BQ25895M. the data sheets appear identical apart from some minor places. What have i missed ? Also the Eval kits BQ25895MEVM-664 seem interchangeable BQ25895EVM-664 (If the BQ25895 or BQ25895M function is the same). Regards Chris + +Christoper, The key difference is 895M default constant voltage is 4.35V while 895 default constant voltage is 4.2V. Regards, Jeff + diff --git a/data/text/DLP3/898739 b/data/text/DLP3/898739 new file mode 100644 index 0000000000000000000000000000000000000000..8aecabf88e9faa3ca1d5641d4c610f54609ae6e6 --- /dev/null +++ b/data/text/DLP3/898739 @@ -0,0 +1,6 @@ +TPS3808: About delay time with CT pin @TPS3808 + +Part Number: TPS3808 Hi team. Our customer use this device setting 10s delay with CT pin. In datasheet, RESET delay time is 0.7s~1.7s at typ 1.2s.(About ±40% error) Do you think there will be a similar error for 10s? Best regards teritama. + +Teritama, In Section 8.3.2 of the datasheet, the recommended program time is between 1.25 ms and 10 seconds so I believe the 10 second delay will have similar error. The important note is the type of capacitor used. Note that a low-leakage type capacitor such as a ceramic should be used, and that stray capacitance around this pin may cause errors in the reset delay time. If the capacitor has error tolerance or parasitic leakage, this adds to the reset delay error. + diff --git a/data/text/DLP3/898746 b/data/text/DLP3/898746 new file mode 100644 index 0000000000000000000000000000000000000000..56d8556ad2b52b1674c73fb0587e98c4b31771ed --- /dev/null +++ b/data/text/DLP3/898746 @@ -0,0 +1,6 @@ +UCC5390ECDWVEVM: Current consumption of the UVLO pin (GND2) + +Part Number: UCC5390ECDWVEVM Hi TI. I am currently working on a split power supply for a gatedrive, but I need to know how much current that will flow out/in of the GND2 pin of the UCC5390ECDWV. Please also take max temperature into account. Thank you! + +Hi, Soren, Welcome to e2e, and thanks for your interest in our products! For the UCC5390E GND2 pin, as you noted, it is used as a reference for the UVLO circuitry to accommodate split-supply operation. Since it is used as a sensing reference, very little current will flow in/out of it. We don't specify this, but you can assume it will be on the order of tens of microamps if used as shown in in Figure 4 of the users guide. NOTE: R2 is zero ohms, and R3 is open, thus tying the GND2 pin to ground as shown in Table 1. Let us know if you have further questions. + diff --git a/data/text/DLP3/898752 b/data/text/DLP3/898752 new file mode 100644 index 0000000000000000000000000000000000000000..b8cf289d153909f4f0228079734de7d51ee225b0 --- /dev/null +++ b/data/text/DLP3/898752 @@ -0,0 +1,10 @@ +BQ24210: Use of Two Solar Panels and USB Like Input + +Part Number: BQ24210 Hello, I am using the BQ24210 as a charging circuit for a 5000 mAH battery in my application using 2 solar panels and/or a USB type input as the power source. I utilized the BQ24210EVM to develop my application and it is working well. The three inputs each feed into the VBUS through a Schottky diode (3 diodes). The only jumpers I have set on the EVM board are JP4 (LPCM) closed and JP1 (iSET to 500 mA) closed. One primary objective is to have the current coming in from the solar panels be additive. That is, due to sun angles, if one solar panel is exposed to produce 150 mA of charge current out of the BAT output and the other panel is exposed to produce 50 mA at the BAT output, the total charge current will add up to 200 mA for the battery charge current. Using this approach works fine with using the BQ24210EVM prototyping board in my large prototype of the system. I can place one panel in full sun and the other covered and get 150 mA of charge. Covering the first panel and exposing the second panel also produces the expected 150 mA of charge. Exposing both at the same time produces the desired 300 mA of charge to the battery. The EVM circuit was duplicated (without all of the extra option components) on a PCB with the connections the same as if the JP1 and JP4 connections are closed. During test, the input of each panel works fine but they are not additive. Whichever panel has the larger current drives the output BAT current. Using the example above, illuminating one panel at a time results in each producing 150 mA on its own but with both exposed the output is still only 150 mA. Here is an extract from my PCB schematic. The large blue lines were added during debug. The one marked 1 goes to an ADC to determine input current value and the /EN input comes from the output of a GPIO pin on a processor. The USB like input is from a 12V input stepped down through a 5 volt regulator - this is not connected during the above testing. However, it was previously tested without the panels exposed to sunlight and the charge current varies based on charge level of the battery during the life cycle of the LPCM type charge. LPCM was chosen since we are only interested in trickle type charging from the solar panels and 12v input. Do I need to set a bias on VDPM or the TS/VTSB inputs? + +Hi Gary, This is most likely due to issues with ORing of the diodes. See section 3 of this document explains what is happening. "Forward voltage drop of the schottky diode has a negative temperature co-efficient and it reduces with increasing temperature. This can lead to situation where a single supply carries the entire load current though second supply is still present and results in increased junction temperature TJ ." Section 8 of document explains how this issue can be resolved by using an ideal diode controller like LM74700-Q1 instead of normal shottky diode. Best, + +Hi Nick, Thank you very much for the rapid response - it was a pleasant surprise after some of the experiences I have had with other Forums. I followed up with your suggestion and reviewed the LM74700-Q1. That was a fairly complex change to add for each input. I further investigated the documentation on both the BQ24210 device and the associated EVM. I found a note hidden in a cell of a row in one of the tables that VBUS expects both a 10 uF and 0.1 uF capacitor at the VBUS input (no explanation of why). Even though I doubted that would work, I tacked those devices onto the PCB and the function is now working as desired (the inputs are additive in current flow). Again, I appreciate your support and will get back to you if there are any other questions. Best regards, Gary DeWitt + +Hi Gary, The 0.1 uF cap is for high frequency noise filtering. It is optional and will depend on noise coming from source and noise requirement of load. Best, + diff --git a/data/text/DLP3/898755 b/data/text/DLP3/898755 new file mode 100644 index 0000000000000000000000000000000000000000..4cfd212681a378674936f7982f92bb1e359fdb1d --- /dev/null +++ b/data/text/DLP3/898755 @@ -0,0 +1,10 @@ +How to measure Loop Gain and Phase of switching power supply + +Hello, I have read the Application Report "Optimizing Transient Response of Internally Compensated dc-dc Converters With Feedforward Capacitor" SLVA289B to measure and optimize the phase margin of my design. In section 2.3 "Determining the Crossover Frequency Using Frequency Analysis" How the loop Gain and Phase are measured ? The only solution is the FRA technique ? Best Regard's, + +Hi KevinMEL Thanks for reaching out with your questions. Using a frequency response analyzer is the easiest way to measure the loop. However if there you don't have access to this piece of equipment a function generator, oscilloscope and transformer can be used to measure the loop. Please take a look at this application note to help implement the measurements. -Garrett + +Hi Kevin, Basically you need a frequency response analyzer to measure the Bode Plots. There are many vendors producing the analyzer, including Keysight, Venable and Ridley, different vendors but the method is the same. For your reference, you can read the article at the below link for the loop measurement. http://www.ridleyengineering.com/hardware/ap310-analyzer/ap300-application/ap300-measurement-techniques.html Another method, which is for experienced engineer without an frequency response analyzer, is presented in the article below. /lit/an/snva364a/snva364a.pdf Thanks, Youhao Xi, Applications Engineer + +Hello, Thank you for your useful informations Best Regard's, + diff --git a/data/text/DLP3/898756 b/data/text/DLP3/898756 new file mode 100644 index 0000000000000000000000000000000000000000..0614c461a556e621da83023b3dd045629afdec18 --- /dev/null +++ b/data/text/DLP3/898756 @@ -0,0 +1,8 @@ +BQ76PL455A: Battery Charger System with Offline Power Supply + +Part Number: BQ76PL455A I am trying to design a system for charging a Battery Pack. The batttery pack consists of ~75 cells of AgZnO chemistry cells, whose voltage is 2.1V when FULL and 0V when EMPTY. The battery pack shall be charged with CONSTANT CURRENT using a dedicated battery charger with either 10A or 5A according to the avarage cell voltages. The battery charge current is controlled using RS232. The Battery charger is only activated when charging is required. I am considering usingcompany battery monitors BQ76PL455A, BQ76940. For the control of battery charging I shall use MSP432 with ETHERNET control interface. The control interface shall ALWAYS be ON. I need to know ONLY the voltage of each cell. The battery pack shall be replacable and I want to be able to measure even when the cells are EMPTY (0 Volts). I am confused about the power supply input of these BMS ICs. The 'TOP' pin is shown in the datasheets, should be conntected the most positive voltage in each battery pack within the BMS. My interpretation of this is that, when the cells are totally EMPTY and the charger is not activated, not POWERED, I can not measure the cell voltages because the TOP pin voltage is 0V. I want to be able to measure the cell voltages while charging and while not charging when the charger is OFF. Is there a way to power the stacked BMS with an external supply? In section 6.3 it is stated Vtop could be between 12V and 79.2V. But Vsense16 = TOP. To my understanding means that supply of the BMS is again the battery pack. Again if the batteries are EMPTY or there are NO INSTALLED batteries I can not see 0V or that there are no batteries. I am attaching a block diagram of the system I am considering. I would be glad if you could help me. Kind Regards + +Hi Kerem, It is possible to power using an external supply although that is not typical use and how we tested so there can be situations to watch out for like in below question: /support/power-management/f/196/t/852651?tisearch=e2e-sitesearch&keymatch=bq76pl455a%25252525252520external%25252525252520supply Another point to keep in mind is that the Vmin of the input cell voltages is 1V so when the cells go below that you may not have good measurements. Typically we work with LI-ion solutions that are 3.7V nominal. Regards, Taylor + +thank you so much for your reply. This IC would not be suitable for my applications unfortunately + diff --git a/data/text/DLP3/898758 b/data/text/DLP3/898758 new file mode 100644 index 0000000000000000000000000000000000000000..91f118443b9f391e0eb61e48460614fd6a957a50 --- /dev/null +++ b/data/text/DLP3/898758 @@ -0,0 +1,8 @@ +TLC5947: Max # of multiple devices + +Part Number: TLC5947 Hi team, My customer considers to use 10pcs of TLC5947. Figure.23 shows that the device can be connected by daisy chain. How many devices can be connected and what is factor of the limitation? I'm looking forward to hearing back from you. Best regards, Shota Mago + +Hi Hardy, Thanks for your quick response and answer! Best regards, Shoat Mago + +Hi Shota, Sorry that I deleted the reply by mistake, so I re-post it again. In theory the cascade number should be infinite. But due to the limitation of data transmission speed, the display may have synchronous issue between beginning ICs with end ICs, in large amounts applications. It was limited by customer's MCU GPIO speed. I think 10pcs is totally OK. + diff --git a/data/text/DLP3/898759 b/data/text/DLP3/898759 new file mode 100644 index 0000000000000000000000000000000000000000..fd19a2a07b99a346435fdbe6871d99a9cf33ba6c --- /dev/null +++ b/data/text/DLP3/898759 @@ -0,0 +1,14 @@ +LMG3410R050: GaN VDS minimum required + +Part Number: LMG3410R050 What is the minimum VDS in which GaN can operate ? We will have voltage of around 0.75V to 1.5V on the drain terminal. What is the max Drain to source current I can drive from LMG3410R050 GaN device ? Regards, Bhanuprakash Nayak + +Hi Bhanuprakash Thanks for contacting us. For our device there is no minimum VDS requirement. However, I think it is an overkill to use our 600V device on this application. As for the maximum Ids, if it is the DC current, then it should be lower than 12A for long time operation. During transient, the current can go to 27A assuming junction temperature of 100 degree. Also it can withstand current up to 130A if the pulse is <1us. If it is AC current, then the 12V limit will be applied to the average current. As for the RMS current, the thermal is limiting factor, and the max current should be under the 27A as well. May I know what the application is for and why are you considering GaN here (what are the benefits you are trying to get out of it)? Thanks! Regards, + +Thank a lot for your quick response Yichi. We are planning to design a new tool which can validate the our mother boards Voltage regulators. We sink current through this GaN to emulate the processor behavior. So that platform VRs can be validated. We will have VDD of around 0.75V to 1.5V and current of around 220A max. We can consider doing parallelization here. What's the resolution I can achieve with this GaN, let's say if I am planning to drive 1A to 1.005A. Can this small step be achieved ? Prime reason of considering GaN is that we need very high rise time requirement, more current and lesser real estate. Thanks and Regards, Bhanuprakash Nayak + +Hello Bhanuprakash, Is the current going to be just one short pulse? How long the 220A current will last per pulse? Yes 1A to 1.005A is achievable. I think that has more to do how you control your supply, since once GaN is on, it can drive whatever current go through it. For our GaN, we can achieve around 100V/ns slew rate. What is your rise time requirement? Also I am not sure about the more current and lesser real estate statements here. Can you elaborate on those? Regards, + +Hi Yichi, It is not going to be a short pulse. This is the continues current. We also have pulsed current requirement but my understanding is that GaN can very well manage that. When you siad "Yes 1A to 1.005A is achievable. I think that has more to do how you control your supply", Do you mean all the current flown along from Drain to Source is solely dependent on the Gate Drive and not on what voltage the VDD is tied to ? 100V/ns is more than sufficient for our design. We are currently using MOSFETs now and it takes more area and current limit is lesser. And we use OP-AMPs to drive the gate of the FET. In the SOA graph the spec is defined upto 600V and lower voltage values are not very clear. My understanding is that VDS solely depends on the current flown across the RDS-ON. Then how can one reach 600V across VDS ? We will have aroudn 1V connected to VDD, Gate will be driven by OP-AMP, Can I drive 12A continues current ? Thanks and Regards, Bhanuprakash Nayak + +Hello Bhanuprakash, We usually refer Vdd as supply voltage for GaN device. When you say Vdd, you meant the bus voltage applied to the drain right? The 600V (should be under 480V according to SOA for safe operation) Vds datasheet is referring to is the voltage across the device when the GaN is off. This is the maximum voltage you can apply the bus voltage across the GaN device for it to hold off. While device is on, the Vds will be Rdson*Ids. Say your bus voltage is 1.5V, and the current is 1A, then while device is on, the voltage at the source of the GaN will be 1.5-1*0.05=1.45V. Again, amount of current you are supplying depends on your application. Also 12A continuous current is okay. Regards, + diff --git a/data/text/DLP3/898773 b/data/text/DLP3/898773 new file mode 100644 index 0000000000000000000000000000000000000000..d7f1366376384dcb01a71ea2e9d3893a78e93d0b --- /dev/null +++ b/data/text/DLP3/898773 @@ -0,0 +1,6 @@ +CSD95490Q5MC: Need full data sheet and other detailed information of CSD95490Q5MC + +Part Number: CSD95490Q5MC Hello ; working for high current source and i want use CSD95490Q5MC.. Full data sheet and other detailed information of CSD95490Q5MC. How to calculate LSET resistor & inductor. What about voltage output of IOUT & TAO + +Berat, Thank you for posting. I see you also already reached out to us on the list serve so I am going to continue this conversation offline over there. + diff --git a/data/text/DLP3/898774 b/data/text/DLP3/898774 new file mode 100644 index 0000000000000000000000000000000000000000..06e35175ba0e62eea1d3bf2a95c47f3a7deffe59 --- /dev/null +++ b/data/text/DLP3/898774 @@ -0,0 +1,12 @@ +LM1085: Do you have any graph of ESR range for LM1085 like Figure 16 in AN-1148 application report? + +Part Number: LM1085 Hello guys, One of my customers is going to use LM1085 for their new products. At this time, they have the following questions. Could you please give my you reply? Q1. Doescompany have any graph of ESR range for LM1085 like Figure 16 in AN-1148 application report? AN-1148 /lit/an/snva020b/snva020b.pdf Q2. Doescompany have any graph of ESR range for LM1085 in 10uF, 22uF, 33uF case? Ifcompany doesn't have, could you please tell me how to calcurate ESR for each capacitance case? Your reply would be much appreciated. Best regards, Kazuya. + +Hi Kazuya, We don't have ESR plots for this device like Figure 16 in AN-1148 application report. Please review the following E2E post, which is very similar to your question. /support/power-management/f/196/t/895870 If after review of this post, you still need assistance, please reply and let me know. Thanks, - Stephen + +Hi Stephan, Thank you very much for your reply. The customer checked LM1085IS-3.3 output waveform on their own PCB with several POSCAP as the below. Cout(uF) ESR(mohm) Fzero(kHz) (@500kHz) (Fzero=1/(2pi*Cout*ESR)) CAP1: 47 41 82.6 CAP2: 33 53.3 90.5 CAP3: 22 44.1 164 CAP4: 10 48 331.6 CAP5: 5.6 66.5 427.4 As the result, CAP1 case was most stable output voltage and CAP5 was most unstable. ( Output waveform stable CAP1 > CAP2 > CAP3 > CAP4 > CAP5 unstable) In case of CAP5, the output voltage was oscilated with 100kHz and 70mVp-p at light load. In case of CAP1, the output voltage was stabled at the light load. The customer though CAP5 case is most stable because the E2E post you wrote said Fzero should be set to 500kHz for LM1085. But the customer experiment result showed CAP1 is the best for output voltage stability and CAP5 is the worst. My questions are... 1. Is 500kHz for LM1085 Fzero correct? May lower frequency than 500kHz be actual Fzero? 2. If 500kHz is not correct, what is the actual Fzero. Which frequency is recommended for LM1085 Fzero? Could you please give me your reply? Thank you again and best regards, Kazuya. + +Hi Kazuya, Thank you for the detailed information and post. I need some additional information before I can fully reply to the customers concerns. Was the test at room temperature? Can the customer provide the specific manufacturing part numbers of each capacitor, as well as their output voltage? If so, we can do a review of the capacitance including bias effects, which will change the actual capacitor value. Can the customer provide an oscilloscope plot showing the condition where the linear regulator was unstable (Cap 5 with 100kHz frequency oscillation)? What load is considered light load to the customer? Thanks, - Stephen + +Hi Stephen, Thank you very much for the pronmpt reply. >Was the test at room temperature? >Can the customer provide the specific manufacturing part numbers of each capacitor, as well as their output voltage? Yes. The test was at room temperature and each capacitor part number is the follow. CAP1: Panasonic 10TPB47M CAP2: Panasonic 10TPB33M CAP3: Panasonic 8TPC22M CAP4: Panasonic 8TPC22M CAP5: Panasonic 25TQC5R6M >Can the customer provide an oscilloscope plot showing the condition where the linear regulator was unstable (Cap 5 with 100kHz frequency oscillation)? >What load is considered light load to the customer? The customer don't want to disclosed the waveform they took to E2E. If it is no problem, could you please tell me your e-mail address? Thank you again and best regards, Kazuya. + diff --git a/data/text/DLP3/898776 b/data/text/DLP3/898776 new file mode 100644 index 0000000000000000000000000000000000000000..8fe7577f83f2e70558fd70af3e08ffbac28e74b2 --- /dev/null +++ b/data/text/DLP3/898776 @@ -0,0 +1,8 @@ +CSD19536KCS: Parameters needed not found in DS + +Part Number: CSD19536KCS Hello - We are looking for these parameters and we weren't able to find them in the DS: E_on Vs I_D E_off Vs I_D V_on Vs I_on at different temperatures Various R and C values for thermal impedance and test conditions for all the above data. Thank you + +Hi Dan, Thanks for the inquiry. These are parameters that we do not spec or test for our FETs. If you can share more information about the application, I can try to help you out. If you're not comfortable sharing the details on this public forum, please send me a note on my email. + +Hi Dan, I'm going to close out this e2e thread since we're discussing via regular email. + diff --git a/data/text/DLP3/898778 b/data/text/DLP3/898778 new file mode 100644 index 0000000000000000000000000000000000000000..78a5c5bedb77edf3f50474161213d43bcb0da6f5 --- /dev/null +++ b/data/text/DLP3/898778 @@ -0,0 +1,8 @@ +TPS65130: Vneg max current + +Part Number: TPS65130 Hi Team Would you advise my customer's question of Vneg max current at Vin = 3.15V, Vout = - 6.7V? Because max current is difficult to estimate from the below graph in datasheet. Thanks Best regards, Shidara + +Hi, I have notified our expert regarding this topic. Please expect a response by 4/23/20. Thanks, Aaron + +Hello Shidara-san, Maximum load current is dependent on input voltage, output voltage, load current and converter efficiency. Basically, in the case of TPS65130/131 it is limited by internal switch current limit. Theoretical max current at Vin=3.15V, Vout=-6.7V should be ~160mA for TPS65130. If customer is concerned about max current margin, I would suggest to use TPS65131 instead of TPS65130 because it has a much higher internal switch current limit and hence can support much higher load current. Kind Regards, Liaqat + diff --git a/data/text/DLP3/898780 b/data/text/DLP3/898780 new file mode 100644 index 0000000000000000000000000000000000000000..3c29f9fe87863b90553bf48a921a0d9ab324de10 --- /dev/null +++ b/data/text/DLP3/898780 @@ -0,0 +1,14 @@ +TPS659037: Vcc slew rate and LDORTC OFF period + +Part Number: TPS659037 Hi, Application note (SWCA302) describes Vcc slew rate and LDOVRTC_OFF condition for POR generation. Our customers designed this application note before it was released. Therefore, they do not consider those conditions. I understand that if those conditions are not met, the POR will not generate successfully. What issue does that cause? Best regards, Yuto Sakai + +Sakai-san, If the VCCA slew rate or VRTC discharge level was not considered at time of design, there is the chance for the device to not turn back on during fast off/on conditions. One of these conditions must be met to guarantee a POR event in fast off/on events. Please note that the TPS659037 is changing silicon revision over the next year (part number staying the same) that will resolve this issue for future builds and designs. Thanks, Nastasha + +Hi Nastasha-san, Thank you for your reply. How fast is "fast off / on"? If either Vcc slew rate or LDOVRTC_OFF condition is met, is the POR event guaranteed? Best regards, Yuto Sakai + +Sakai-san, The timing of the fast on/off if system dependent, based off your VCCA slew rate (which may not be linear and depends on your board loading and capacitance). The POR detection mechanism samples every 1ms. If the VCCA supply falls faster than 90mV/ms between 1.9V and 1.8V, than the POR may not be detected. The LDOVRTC discharging can also allow the device to detect POR if it discharges below 300mV. Depending on how long your system takes to reach that voltage after an off event, you will have an idea of how fast the off/on timing can be for your system. Any off/on event that is faster than the discharge time of the LDOVRTC if your VCCA is dropping too fast, could cause a POR to not be detected. Thanks, Nastasha + +Hi Nastasha-san, Thank you for your support. Let me ask you an additional question. What's the problem caused by missing POR events? Best regards, Yuto Sakai + +Sakai-san, If the POR event is not detected, the device will not start up. It will need to be reset again. Thanks, Nastasha + diff --git a/data/text/DLP3/898784 b/data/text/DLP3/898784 new file mode 100644 index 0000000000000000000000000000000000000000..af5934ef525fd8f01ae7a7a3b1c0791fe68cc2c7 --- /dev/null +++ b/data/text/DLP3/898784 @@ -0,0 +1,6 @@ +UCC28711: Problem with the control response of the IC + +Part Number: UCC28711 Hello, I designed a flyback converter using the UCC28711. The DC input voltage ranges from 150V-1000V and the output voltage consists of 2 outputs of 17V each. Unfortunately, the circuit does not respond as expected. I observe different responses of the control law of the IC according to the input votlage. In particular, when the for input voltage is: up to 270V, the output is correct. (file name: 270V.pdf) From 270V-300V, the control law reduces the frequency and the duty cycle discharging the output up to 13.5V. Then it increases the frequency and the duty cycle again, until the output becomes 17V. After that, it repeats again the process. Thus, the output voltage, looks more like a sawtooth. (file name: 300V.pdf) For output voltage close to 320V, all of a sudden the output becomes 12.37V. (file name:330V.pdf) In general, the level of input voltage at which the changes happen depends on the load, but overal the pattern is the same. Have you seen anything similar in other applications? In the following pdf you can find attached the waveforms of important parameters. Blue:Vdd Red:DRV Green: voltage on the anode of the auxiliary winding diode Yellow: Output270V.pdf 300V.pdf 330V.pdf Thank you. + +I suggest you to take a look trouble shooting steps from the below link. /.../slua783 Also, you may make one output debugging and leave the other one no load. + diff --git a/data/text/DLP3/898786 b/data/text/DLP3/898786 new file mode 100644 index 0000000000000000000000000000000000000000..3153b41a7f34710d486d0c461186f8092e751511 --- /dev/null +++ b/data/text/DLP3/898786 @@ -0,0 +1,8 @@ +WEBENCH® Tools/LM3481: Simulation with WEBENCH of a SEPIC circuit with an LM3481 + +Part Number: LM3481 Tool/software: WEBENCH® Design Tools Hello, I have simulated a converter with WEBENCH, I have attached the simulation. The inductor suggested is a DRQ127-3R3-R, datasheet report for the series configuration a max Irms = 5.23 A and Isatpeak=10.8A. looking the graphics for Lin (see below) it seems that the current can be higher than 5.23A. Are my considerations wrong ? Can I use that inductor even if Vin=4V and Iout = 3A, as required in my simulation ? Best regards Riccardo WBDesign17.pdf + +Hi Riccardo, Thanks for your interest in LM3481. The Irms current rating is the current of 40degree C temperature increase. For example, if your ambient temperature is 25 C, the inductor would becomes 65 deg C theoretically, which should be fine. That being said, if you have high ambient temperature or you want a better thermal condition for the inductor, you will need to find a better inductor. Please let me know if you have further questions. Thanks, Yinsong + +Thanks a lot + diff --git a/data/text/DLP3/898788 b/data/text/DLP3/898788 new file mode 100644 index 0000000000000000000000000000000000000000..38e7a704cc6cda43c7a17c634d3bf5d49551d2ba --- /dev/null +++ b/data/text/DLP3/898788 @@ -0,0 +1,6 @@ +Compiler/BQ40Z50: BQ40Z50问题汇总 + +Part Number: BQ40Z50 Tool/software:company C/C++ Compiler 对于BQ40Z50有如何的几个问题： 1、当Qmax的设置数值比DC容量低的时候，SOH会降低。 2，温度对SOH,SOC的影响，但是没有看到实际数据的影响；能讲下吗? 3，对于电池类型的选择，会产生什么影响；或者说会导入那些数据 + +Please post your questions in English. Thanks. Andy + diff --git a/data/text/DLP3/898791 b/data/text/DLP3/898791 new file mode 100644 index 0000000000000000000000000000000000000000..4474c8fff043d00c8d2468c2e55094917f27ab7e --- /dev/null +++ b/data/text/DLP3/898791 @@ -0,0 +1,6 @@ +BQ28Z610-R1: I2C PullUp , internal pin construction + +Part Number: BQ28Z610-R1 Hello, a want to use the BQ28Z610-R1. At the moment i have some problems with the I2C pins. Based on this: /support/power-management/f/196/t/625940?tisearch=e2e-sitesearch&keymatch=BQ28Z610%2525252525252520i2c /support/power-management/f/196/t/624959?tisearch=e2e-sitesearch&keymatch=BQ28Z610%252525252520i2c it was said that the mentioned 3,3 kR pulldown resistor is wrong. But the newest datasheet still have the resistor entry: So the question is: is this still wrong and the I2C pins are simple open-drain pins without any pullup/pulldown resistor? Best regards Andre + +Hi Andre, The 3.3k pulldown resistance should be still an error. The I2C pins are open-drain pins and need pull-up resistors. Andy + diff --git a/data/text/DLP3/898793 b/data/text/DLP3/898793 new file mode 100644 index 0000000000000000000000000000000000000000..f24f239c34ce3ef20ea32126a54a18b23fbe5f2d --- /dev/null +++ b/data/text/DLP3/898793 @@ -0,0 +1,6 @@ +UC3875: Input filter capacitor + +Part Number: UC3875 Hi there, I'm trying to find some guidelines for choosing an input capacitor for regular phase-shifted full bridge (PSFB) topology. Do you have something (any documents/ANs) to share with me? Any help you could provide would be much appreciated. Looking forward to hearing from you. Thanks & BR, Ghasem + +Hello Ghasem, The capacitor needs to be able to supply the input current switching wave shape to the converter whether it is a PSFB or any other kind of converter. So you can calculate the RMS input current and ensure that the input capacitor is rated for this value. That is the minimum input capacitor requirement. The actual value used will normally exceed this number. In practice because the power rating is proportional to the input capacitance times the input voltage squared then the amount of input capacitance is proportional to W/(V^2). So for example the UCC28950EVM has an input voltage of 390V with a power rating of 600W and it uses 330uF input capacitance. This is sort of a rule of thumb used for the initial prototype design. Your next step would perhaps be to simulate your design with Power Stage Designer tool and this will accurately calculate the capacitor ripple current and voltage. You will then be able to check the effects of increasing or decreasing the capacitor value. Your final design will be limited by the volume of space available for Cin and EMI considerations since differential mode noise is minimized by increasing Cin. There also may be a requirement for a holdup time for the converter and the value of input capacitance may be determined solely by the operating range of input voltage and the hold up time. Hope this helps . Regards John + diff --git a/data/text/DLP3/898794 b/data/text/DLP3/898794 new file mode 100644 index 0000000000000000000000000000000000000000..518f6331b96cd58777a49dbec8a7d0ed797ae83b --- /dev/null +++ b/data/text/DLP3/898794 @@ -0,0 +1,8 @@ +TPS65131: Inductance calculation for 60mA load current + +Part Number: TPS65131 Hi Experts, We are calculating the inductance L1 and L2 based on below formula described on page 13 of the data sheet. In our usage model, the load current is less than 60mA. If we calculate L1 and L2 with the load current as 60mA, L1 and L2 are calculated as below. L1 = 45.37uH L2 = 228.7uH There is an explanation on page 14 as below. My question is if we can ignore above inductor recommendation value and can use TPS65131 with light load current as 60mA. Regards, Uchikoshi + +Hi, I have notified our expert regarding this topic. Please expect a response by 4/23/20. Thanks, Aaron + +Hello Uchikoshi-san, 4.7uH inductor has been used on the TPS65131EVM and most validation was done with this value at light as well as heavier load. So I would suggest to stay with 4.7uH for both boost and inverting converter but if customer must increase inductance, to perhaps reduce ripple, I would not suggest to go beyond 10uH because higher inductance value will reduce loop stability margin. Customer should measure and ensure that there is enough phase/gain margin for loop stability. Kind Regards, Liaqat + diff --git a/data/text/DLP3/898806 b/data/text/DLP3/898806 new file mode 100644 index 0000000000000000000000000000000000000000..ba84dd7ea370ef18eb7e2411ea432213e367f78f --- /dev/null +++ b/data/text/DLP3/898806 @@ -0,0 +1,6 @@ +LMZ31530: Thermal Performance + +Part Number: LMZ31530 Dear Team Can you base on the below schematic to calculate the temperature on the case? It should related to power loss and Junction-to-case (top) thermal resistance, right? BR Kevin + +Hi Kevin, Yes, case temp will be related to the power loss and thermal resistances. The customer design appears to be set to fsw = 650kHz, but Figure 3 in the datasheet should give a good indication of expected power loss with the Vin=12V Vout=0.9V Fsw = 500kHz power dissipation curve. It looks like there will be about 4.9W of dissipation at 25A With this power dissipation and the thermal resistances in the Thermal Information table and assuming we have an ambient temperature of, say, 30°C, and natural convection conditions, we can estimate that junction temperature will be about Tj = Ta + Pd*ThetaJA --> 30°C + 4.9W*8.6°C/W = 72.1°C. Case temperature will be lower than this by Pd*PsiJT or 4.9W*1.6°C/W = 7.84°C. In other words, estimated case temperature will be around 64.3°C. I hope this helps, Kris + diff --git a/data/text/DLP3/898811 b/data/text/DLP3/898811 new file mode 100644 index 0000000000000000000000000000000000000000..67f0060b000926ed31a1609a8450e42f395d8087 --- /dev/null +++ b/data/text/DLP3/898811 @@ -0,0 +1,6 @@ +UCC21222-Q1: How does propagation delay affect dead time max/min value and dead time matching? + +Part Number: UCC21222-Q1 Hi team, How does propagation delay affect dead time max/min value and dead time matching? Datasheet says dead time range when RDT=20k is 160ns~240ns. Also dead time matching is 20ns max. Do they include propagation delay, whose max value is 40ns? Also do they include propagation delay matching, whose max value is 5ns? In addition, how should we design dead time with including propagation delay? Regards, Ochi + +Ochi-san, The dead-time is defined as the time when neither ChA nor ChB are on/conducting. Propagation delay itself doesn't necessarily affect deadtime if everything is well-matched. If the propagation delay varies between turn-on and turn-off or channel to channel, and prop delay matching is not totally perfect from channel to channel, then dead-time is needed to avoid short-circuit. Regarding your question about whether dead-time figure includes the prop delay / matching: The dead time is enforced between the rising and falling edge of output as in the Figure 30 below. The operation of dead-time waveform is shown in this figure of the datasheet To design dead-time, the basic principle is to find the minimum off time you need to ensure that both channels will never be switched on, plus some margin/headroom. This can be done by: sum pulse-width distortion, channel to channel delay matching, and difference of rise and fall time for a channel. For accuracy the rise and fall time should be based on the load that will be driven. I hope this helps. Let me know if you have more questions. Best Dimitri + diff --git a/data/text/DLP3/898814 b/data/text/DLP3/898814 new file mode 100644 index 0000000000000000000000000000000000000000..a5bca6e64cc0aed4d5692d28c8c35a61b57b339f --- /dev/null +++ b/data/text/DLP3/898814 @@ -0,0 +1,10 @@ +LM76005-Q1: Production ready schedule? + +Part Number: LM76005-Q1 Hello, I am designing a system and the LM76005 is a suitable and preferred part, however the device's status is only 'Preview' instead of 'Active'. Do you know when this part might become available? Thanks, Rob + +Hello I will speak to the marketing team for this device and get back to you as soon as possible. Thanks + +Hello The LM76005-Q1 and the commercial LM76005 are planned to be "active" in Q3CY20 Samples and EVMs are available now. Thanks + +Thank you for the swift response. + diff --git a/data/text/DLP3/898823 b/data/text/DLP3/898823 new file mode 100644 index 0000000000000000000000000000000000000000..c71594d9c3c8a386abfdcbb7fb82a5657541f474 --- /dev/null +++ b/data/text/DLP3/898823 @@ -0,0 +1,6 @@ +BQ2970: Battery protection design not working + +Part Number: BQ2970 Can someone please tell me what I did wrong on my battery protection design? The 18650 battery charges normally measuring around 4v or so but VBAT always measures around 1.4v. It is possible the dual mosfets are the wrong type but they have a Vgs of 1v. Parts used are:company BQ29700DSER: www.digikey.com/.../5973209 Vishay SI1922EDH-T1-GE3: www.digikey.com/.../3679992 + +Hi Mike, I don't recognize a problem.company recommends the Rgs resistors but the part works without them. Check that the layout put the pins where you expect for all the chips. When charging be sure COUT goes high, check that the charger takes GND below VSS of U3. Shorting across the FETs should also put the part in normal operation mode. Watch what happens to COUT and DOUT when the charger is disconnected. A transient could but the BQ2970 in fault mode, but it would seem unlikely. If it is a new build try another board, if it is one of a kind, try different parts to see if it might be a damaged part in handling or assembly. Monitoring the circuit is interesting as the BQ2970 has voltages defined from VSS, most of the system sees voltages with respect to GND. + diff --git a/data/text/DLP3/898825 b/data/text/DLP3/898825 new file mode 100644 index 0000000000000000000000000000000000000000..1c0b73a01ef7925f8c2c2a853f77e9ee2a3ad63e --- /dev/null +++ b/data/text/DLP3/898825 @@ -0,0 +1,14 @@ +LMG5200: SPICE model gives error in mixed simulation modula of Altium designer + +Part Number: LMG5200 Hi everyone, I am interested in using the LMG5200 for a full bridge application. I have downloaded the unencrypted spice model of LMG5200 and converted it into a CKT model file that can be read by the Altium designer simulation module. I made a very simple connection as below so to try out. HI_signal and LI_signal are simply two 10V pulses with 180 phase difference, each of them have a 25% duty cycle. Vin= 80V, Vcc=5V. The simulation results generated report partially shown as below: finally a error at the end: then the simulation is aborted. The transient analysis setup is set as below, I don't the time step problem comes from the setup. I My knowledge of SPICE is not well enough to diagnose the cause, so I hope someone can be so kind to give me some advice on solving this. Thank you in advance! PS: This is where I downloaded the model Kind regards, S.suns + +Hello, Thanks for reaching out regarding the LMG5200 model. The model is used by other customers and has not shown an issue. I suspect it's more likely to be an issue during the format conversion. Could you please try the model in other SPICE tool which does not require conversion and let us know if you still encounter problems. Regards, + +Hi Yichi, Thanks for your reply! As for the conversion, I didn't change the content in the spice model file, I only opened it with Notepad and saved it as a .ckt file. In Altium designer the underlying engine is NGSPICE, do you think that is the reason? As the provided one is PSPICE model. Thank you! Kind regards, S.suns + +Hello Suns, Let me check with my team to see if they have experience converting .lib to .ckt. Meanwhile, could you verify the functionality of the model in SPICE tool such as PSPICE? Thanks! Regards, + +Hi Yichi, Thanks for your reply, please let me know once you and your team have any conclusion on the conversion problem. Meanwhile, I have tried the TINA-TI model on TINA-TI platform, and it works perfectly :) My circuit is quite simple so to use this component, I will work with TINA-TI for now. Kind regards, Suns + +Sounds good Suns! I will update on this posts if any more info on the conversion comes up. Regards, + diff --git a/data/text/DLP3/898831 b/data/text/DLP3/898831 new file mode 100644 index 0000000000000000000000000000000000000000..51fc4205fe6ed5208398f3babaf62bf0b0582064 --- /dev/null +++ b/data/text/DLP3/898831 @@ -0,0 +1,12 @@ +TPS2546: Remote panel dual USB 2.0 charging device + +Part Number: TPS2546 Hi, I have a remote panel with 2 USB ports. The USB2.0 port hub is located on the main board and already has current limiting devices providing 1.16-1.74A to each remote USB rail. I would like to add something like the TPS2546 to the remote rail. I do not have additional signals to enable or detect faults. Auto detection of charging mode would be ideal. USB 2.0 communication would need to remain functional (unless a fault condition occurs). If a TFT display powered by USB is connected without a charging protocol, would the device limit to 500mA? What do you suggest? + +I also have i2c on the remote panel + +The TPS2546 does not support I2C. I would still recommend this device based on your other system needs. I recommend reading up on the BC1.2 standard as it can be helpful to have a good understanding of this charging standard which the TPS2546 is based on. As far as the TPS2546 limiting the current for a TFT display, no it will not limit the current unless you actively change which ILIM resistor it references. Let me know if you have any other questions. + +Thans so much for your answer. I wont be able to dynamically control the device control pins, just set it up and leave it. I don't see an auto mode that will attempt different modes. Is my understanding correct? + +No there is no way for the TPS2546 to dynamically control its own control pins. The closest thing is setting the device in DCP_Auto mode that will advertise and establish different charging contract depending on the device that is connected. However, this either shorts together the DP/DM lines or adds a voltage, so data transmission is not possible in these modes. If you need data transmission, CDP and SDP are the modes that you want to use. + diff --git a/data/text/DLP3/898844 b/data/text/DLP3/898844 new file mode 100644 index 0000000000000000000000000000000000000000..5609c24c6d4209e6541c16f52861b22b3d455384 --- /dev/null +++ b/data/text/DLP3/898844 @@ -0,0 +1,6 @@ +BQ20Z655-R1: Similar new device with exactly the same host communication + +Part Number: BQ20Z655-R1 Hi team, A customer is looking for BQ20Z655 / BQ20Z655-R1 in their design to make sure they are using the newest device and minimizing the risk of having to replace it in the next 10 years. Is there a similar new device that communicates with a host in exactly the same way (same registers etc.)? The PCB of the battery is going to get adjusted but the software of the separate host product will not be updated. This is to ensure battery downward compatibility to old hosts without update capability in the field. Thank you, Franz + +Hi Franz, We don't have a new device that has exactly the same registers. We will continue to manufacture BQ20z655-R1, customer can continue using it! When the customer decides to update their design, we highly recommend migrating to BQ40z50-R2 because this gauge has the latest HW and FW. Regards, Rushi + diff --git a/data/text/DLP3/898849 b/data/text/DLP3/898849 new file mode 100644 index 0000000000000000000000000000000000000000..2644deb9b81e5219cbf42f3316c368eb149e3407 --- /dev/null +++ b/data/text/DLP3/898849 @@ -0,0 +1,8 @@ +UCC28070: About QVFF levels(circuit) + +Part Number: UCC28070 Hi Team, We have two questions for QVFF levels(circuit). [Q1] We understand that QVFF levels is changed by VINAC peak. When QVFF levels is changed (From level2 to level1), does any problem occur (for example, switching stops etc.)? [Q2] If we change "VIN" slowly (“From 85VAC to 265VAC” or “From 265VAC to 85VAC”), Does the change of QVFF levels adversely affect UCC28070 operation (for example, switching stops etc.)? Regards, Hide + +Hi Hide, The update of the QVFF table does not cause any disruption in the operation of the UCC28070 device.The update will also not be affect by slow varaitions in the input voltage from 85Vac to 265Vac. Page 20, Section 7.3.10 of the datasheet describes the QVFF operation and the advantages it confers over a continuous VFF system. Regards Peter + +Hi Peter-san, Thank you for your prompt reply. I greatly appreciate your cooperation. Regards, Hide + diff --git a/data/text/DLP3/898852 b/data/text/DLP3/898852 new file mode 100644 index 0000000000000000000000000000000000000000..bc928fb28d4be568d1109996d69f061ca7178422 --- /dev/null +++ b/data/text/DLP3/898852 @@ -0,0 +1,10 @@ +AWR1843: Read GPADC without chirping + +Part Number: AWR1843 Hi all, we can read the GPADC values by enabling the appropriate monitor and getting an async event after the monitor has run - after e.g. one radar cycle. We need to implement an idle mode where the radar is not chirping (to converse power). Is it possible to still get data from the GPADC? Best regards Sebastian + +Hi The GPADC can perform only ONE MEASURE / Frame during the Frame Idle Time. When the frames are stopped, you can measure the GPADC more often. Thank you Cesar + +Hi Cesar, here is my new understanding of how the different GPADC APIs work: rlSetGpAdcConfig() can be used to start an AD conversion while the sensor is not chirping. One async message will be generated per function call. To continuously monitor an external voltage, the API has to be called periodically. While the sensor is chirping, rlSetGpAdcConfig() can not be used (?). Instead rlRfExtAnaSignalsMonConfig() and rlRfAnaMonConfig() are used to enable one AD conversion per monitoring time period. It is not possible to read the GPADCs more than once per monitoring time period. Is this understanding correct? Are there any other ways to access GPADC values that I missed? Thanks! + +Hello Sebastian, rlSetGpAdcConfig() can be used once the BSS is powered up. It can be used while frames have not been triggered or frames have been triggered, either cases will work. Once the frames have started the temperature read will happen only during the inter frame time, not while an active chirp is ongoing. Also when frames are started this API is updated only once is a frame. Regards, Vivek + diff --git a/data/text/DLP3/898865 b/data/text/DLP3/898865 new file mode 100644 index 0000000000000000000000000000000000000000..c59f0b3bcd4e6cce12d17a46f7766f865389ca1b --- /dev/null +++ b/data/text/DLP3/898865 @@ -0,0 +1,10 @@ +LM5050-1: solution ask + +Part Number: LM5050-1 Hi Team, my customer is looking for a solution which can fit their system spec as below There will be two input source on system , and will be two spec 1. Vin 12V±5% x2 , Iout 37.5A or 2. Vin 35~60V x2 , Iout 9.375A I think using 2 * LM5050-1 might work for both 2 spec above as this device can support up to 75V, and for the current it needed customer to choose the MOSFET which can support up to 37.5V for spec 1 , 9.375A for spec 2. Not sure if my assume is correct or not , please kindly help for suggestion , thanks! Andy + +Hello Lin, Yes, LM5050-1 would work for both the case for redundancy, please confirm this is for redundancy only and not sharing loads. However for the second case, you mentioned that VIN can vary from 35V to 60V? Can one supply be at 35V and other at 60V? Regards, Kari. + +Hi Kari, thanks for reply! For the question you ask, the typ Vin is 48V , 35 and 60V is min and max value. + +HI Andy, LM5050-1 or LM5050-2 can both work. If using LM5050-1, connecting Vs pin to IN pin side is recommended, to avoid leakage current flowing from OUT to IN when Vs is connected to OUT pin side. However for high current support, we recommend LM74700-Q1 also (65V maximum rating). Regards, Kari + diff --git a/data/text/DLP3/898867 b/data/text/DLP3/898867 new file mode 100644 index 0000000000000000000000000000000000000000..3a8db041278816070f28c33fa8cc83e468e443ae --- /dev/null +++ b/data/text/DLP3/898867 @@ -0,0 +1,6 @@ +UCC2897A: How to understand SS and FB? + +Part Number: UCC2897A Hi team, As the datasheet shown, the amplifier output will be the lower voltage of VFB and Vss. How to understand the this amplifier configuration work principle? Thanks + +Hi Dylan, The simplified block schematic is intended to show that the output of the opamps is which ever is the lower value of FB or SS/SD pins. I added the resistors (marked in blue) to the block schematic and this is intended to show that the negative input of the top opamp and the positive input of the lower opamp will force the corresponding input to equal the output. Hopefully this gives helps. Remember this is only a visual block schematic of the actual ic design Regards John + diff --git a/data/text/DLP3/898874 b/data/text/DLP3/898874 new file mode 100644 index 0000000000000000000000000000000000000000..1910ff775e5fddea9adf7286e4bf6cc8f67950d9 --- /dev/null +++ b/data/text/DLP3/898874 @@ -0,0 +1,6 @@ +WEBENCH® Tools/BQ25892: Webench not recognising part number + +Part Number: BQ25892 Tool/software: WEBENCH® Design Tools WEBench doesn't recognise the part + +Hi, Webench tools for battery chargers have been discontinued. Please refer to /support/tools/sim-hw-system-design/f/234/t/857843 for the details. Thanks, Ning. + diff --git a/data/text/DLP3/898880 b/data/text/DLP3/898880 new file mode 100644 index 0000000000000000000000000000000000000000..e218f97578e7ad5d9ce81ffe6830d3b7d7b7152a --- /dev/null +++ b/data/text/DLP3/898880 @@ -0,0 +1,16 @@ +BQ2060: EV2200-60 Software Download + +Part Number: BQ2060 Customer needs EV2200-60 software specified in bq2060 EVM (Rev. A) user manual. Please advise. Regards, Mark + +I have notified the DM team about the missing software on the product page. + +Hi Shirish, Any update on the BQ2060 software? Thanks, Mark + +Mark, Shirish is trying to work on this with FW team. I'll ping him again on Monday. + +With help from the DM team, i was able to trace the literature number. We have associated it with the bq2060 product page. The software download link should show up on the product page in 24-48 hours. + +Hi Mark, Please note that the bq2060 software is 16-bit software and may not run on Windows 10. + +Thank Shirish! Regards, Mark + diff --git a/data/text/DLP3/898881 b/data/text/DLP3/898881 new file mode 100644 index 0000000000000000000000000000000000000000..5b814b8355dfcac6625370977866c9480564dc59 --- /dev/null +++ b/data/text/DLP3/898881 @@ -0,0 +1,10 @@ +UCC28064A: Min and max switching frequency + +Part Number: UCC28064A Hello and good day. Is it possible to request for expected the minimum and maximum switching frequency of UCC28064A? The datasheet doesn't seem to have specs. We've found 45kHz in the design requirements as the minimum. But, if I'm not mistaken, this is a user-defined value. May we please request for the expected minimum and maximum limits? Thank you. Regards, Elisha + +You may look at page 16 of the datasheet to find maximum frequency setup. + +Thank you, may I ask about the minimum achievable switching frequency as well? + +Min fsw is based on maximum MOSFET on time. You can refer the datasheet page 8 for these specs and figure out which one is for your design. The converter is in transition mode so you will be able to get min fsw from the IC specs and your converter design results. + diff --git a/data/text/DLP3/898883 b/data/text/DLP3/898883 new file mode 100644 index 0000000000000000000000000000000000000000..2b61fa44f2f00a8d585f5da0a0a3f9c09b2ad9ac --- /dev/null +++ b/data/text/DLP3/898883 @@ -0,0 +1,10 @@ +LM5122-Q1: Can this IC operate with 5V steady state VCC voltage? + +Part Number: LM5122-Q1 Hello, Can this IC operate with 5V Steady state VCC voltage? The purpose is using this IC directly driving GaN FETs. Is VIN pin allowed not to connect to the real input voltage but connect together with the VCC Pin to an external 5V or 5.5V VCC voltage? Thank you very much. Best Regards Jieyi Zhu + +Hi Jieyi, VIN pin is used as the input to the internal VCC regulator. It can be connected to a voltage higher than what the VCC regulator will output, which is part of the intended operation. The other outcome is powering VCC from a voltage in between 9V - 14.5V in series with a diode, with a blocking diode in series from the VIN supply to VIN pin. For your case, I would not recommend shorting VIN and VCC together. Thanks, Richard + +Hi Richard, Thank you for your answer. I understand the function of the VIN pin. When I use external VCC supply only, is actually VIN pin not really necessary. And I also don't want let it Floating. That's why I would like to short it to VCC pin. In this way, can I just externally supply 5V/ 5.5V DC voltage to VCC Pin? Would this IC operate correctly? Thank you. BR Jieyi + +Hi Jieyi, In order to disable the internal regulator, you must supply a voltage higher than VCC regulation target (9V/lit/an/slua779b/slua779b.pdf?ts=1587746038475 I'm glad you've figured it out. + diff --git a/data/text/DLP3/898898 b/data/text/DLP3/898898 new file mode 100644 index 0000000000000000000000000000000000000000..b24a9c8974db1cd228553a5a55b7e87b79628db8 --- /dev/null +++ b/data/text/DLP3/898898 @@ -0,0 +1,6 @@ +UCC28730: won't start switching and regulating the output + +Part Number: UCC28730 Hello, I'm currently trying to implement the UCC28730 circuit in to the acompany reference design 40V-1000Vin 15 Vout but modified to 24 V output instead. I have changed resistor values to match the datasheet of UCC28730 but it won't start switching when I connect 300 V to HV. I saw that VDD needs to be 21 V to keep the switching going after startup. But it seems like the controller don't start switching at all so it won't give a VDD voltage from the AUX on the transformer. I was reading on a troubleshoot document (/lit/an/slua783/slua783.pdfAlso, do I have to use the wakeup circuit UCC24650 to be able to use UCC28730? Because I am working with a company on my bachelor thesis on this I don't know if I can share the circuit here on an open forum. Any help would mean very much! Best regards David + +You do not have to use UCC24650 together with UCC28730. When VDD reaches its on voltage, you should see three pulses on DRV. If you do not see the three pulses on DRV, your circuit has connection problem so you need to find out. You can follow the trouble shooting notes. It is better you get an EVM to help you learn and understand how the IC works. + diff --git a/data/text/DLP3/898899 b/data/text/DLP3/898899 new file mode 100644 index 0000000000000000000000000000000000000000..17af0acc2f86966472fee543c41b9f6d600925bc --- /dev/null +++ b/data/text/DLP3/898899 @@ -0,0 +1,6 @@ +TPS4H160-Q1: Best High Side Switch for 24V/1A + +Part Number: TPS4H160-Q1 My customer is looking for a 4 x 24V High-Side Switch with 1A current limit (better: adjustable). It seems our TPS4H160-Q1 is the best possible option. Or do you have a better idea? Best Regards Josef + +Hi Josef, With the information given, the TPS4H160 should be fine. I can verify if there's more inform about the loads on each channel but assuming loads carrying less than 1A, the device will work. + diff --git a/data/text/DLP3/898900 b/data/text/DLP3/898900 new file mode 100644 index 0000000000000000000000000000000000000000..ff7cb03b194922b7fcf5967db59de76d1922ab55 --- /dev/null +++ b/data/text/DLP3/898900 @@ -0,0 +1,10 @@ +TPS54202: the VOUT and GND of TPS54202 is shorted immediately when 24V plug in sometimes + +Part Number: TPS54202 Hicompany I use TPS54202 to buck from 24V to 5V with about 1A. And now we see some failures that the VOUT and GND of TPS54202 is shorted immediately when 24V plug in sometimes. this failue is not happened at the first Previous times， means those failure boards are worked before. this failure is not happened when 24V is already power on. means those failure boards worked normally if 24V can power oon successfully at that time. So, Could you please help me to check the schematic and layout below? 5V_EN_CTRL is always enable in this discussion. the red is top layer and blue is bottom. Thanks + +Hi Cun, Could you please capture the input voltage waveforms near the IC to check if any overspike during the hot-plug in process? The over spike during the hot-plug-in process may damage IC. You can refer the appnote for more detailed analysis on the overspike during hot-plug in process: Adding a TVS diode and an electrolytic capacitor with more ESR should be the solutions here. For the layout review, I would like to recommend you referring the example below: The input capacitor should be placed as close to the device as possible to minimize trace impedance The 0.1-µF ceramic bypass capacitor should be as close as possible to VIN and GND pins. Keep complete ground plane under the IC Keep the SW trace as physically short and wide as practical to minimize radiated emissions. Thanks. + +Hi Bruce Thanks for you reply I will check the power when plug in and the capacitor also. for Ground, my board is a 6 layer board, and the layer 2 and 5 are both whole Ground plan, so I think the ground is strong enough. From you view, my IND which on bottom side is not a high risk, but the capacitor and something near the VIN should be high risk in my design, right? + +Hi Cun, Please check my inputs below: SW trace should not route under the IC, or IC will be more easily coupled by this high frequency high dv/dt signal FB trace should keep away from high frequency high dv/dt signal--SW/BST trace. SW trace is too narrow and long, which will lead bad thermal and EMI performance. Keep VIN trace and GND trace wider and closer to IC for small parasitic parameters. I strongly recommend using the layout i attached before. Thanks. + diff --git a/data/text/DLP3/898905 b/data/text/DLP3/898905 new file mode 100644 index 0000000000000000000000000000000000000000..8c1401326950546d1c61a3a9fee9e7c84ec2fc68 --- /dev/null +++ b/data/text/DLP3/898905 @@ -0,0 +1,6 @@ +UC1525B: Spice model + +Part Number: UC1525B Hi, We would like to simulate the stability of our feedback loop. Do you have a Spice model of the UC1525B for that? Regards Matthieu + +Hi Matthieu, I am sorry to say thatcompany does not have a SPICE model for the UC1525B. The LM25037 is another dual output controller that has SPICE models and may be useful if you need to simulate the power stage operation. /.../toolssoftware Regards Peter + diff --git a/data/text/DLP3/898911 b/data/text/DLP3/898911 new file mode 100644 index 0000000000000000000000000000000000000000..6f42e1a532bdd1d8b00417b415d9e22b4cb134e2 --- /dev/null +++ b/data/text/DLP3/898911 @@ -0,0 +1,24 @@ +TPS61196: TPS61196 not start correctly with 12V + +Part Number: TPS61196 Dearcompany Team, Hi, I have question about UVLO and problem with startup. I build device from proposed schematic, everything works perfectly, start nice at around 21V. But if I would like to go down with supply voltage to 12V I have problems. When I have resistors r1 r2 r5 100k 24,9k 100k still everything works correctly (I increment by 1 voltage thus start at around 13V). when I change resistors to r1 r2 r5 100k 24k,9 82k nothing happens, even when I rise voltage up to 21V (enable checked, 33k/10k divider enough for 12V, Voltage on UVLO also), Adding additional capacitor (1uF) refine a little bit more and sometimes TPS start, but sometimes is not acceptable. Should be used other set of resistors (eg. 10k 2.4k 8.2k ?) or ??? Thank you for help. + +Hi Bartosz, Please use our equation 2 in the datasheet to choose the right resistor for the UVLO configuration. What the resistor you have chosen is not right. BR Sean + +I read, this. What I paste was the last test. Ok new one, calculate from equation for Vstart Vstop 10 8,96 266,666666666666 [k] R1+R5 37,3655607494394 R2 So I choose for R5 200k, 33kx2 for R1 and 37.4k for R2 Starts, but also sometimes (if I "power" twice etc.). What I observed when I start them work perfectly if I not discharge (leave for longer time, disconnect from other devices - power supply). Eg. I could block output on power supllay switch of function generator, works till I unplug from PS and Generator. It starts quite good (better but not aceptable) if start voltage is set to 14V or higger If I exchange R1 to 182k like in proposed schematic, start always from around 14V. What should I check ? Thank you Bartosz Reichel + +Hi Bartosz, The calculate method seems ok, I guess the reason is that it may trigger the current limit with the low input voltage. I think you can check the waveform on "ISNS" pin whether it triggers current limit under low supply voltage. BR Sean + +On ISNS I have puls around 200mV then start oscialtion (in 14V case) in 12V case have pulse also around 200mV and nothing, but when I start with 14V and goes down to 12V everything looks similar like for 14V. + +Hi Bartosz, There is two suggestion for the test: 1. Decrease the PWM duty cycle for the test to achieve a light load to check whether it starts normally; 2. Decrease the LED counts for the test. The suggestion that I proposed is to create a light load condition to check whether it triggers something wrong. BR Sean + +Thank you, PWN not help (start from 10%) but decresing count helps (start from half, but works with more, now only test chain to prepare / understoot for final one ). Which parameter should be trim in this case (R7 ?). ISET have around 150k now (and fit to this LED). Best Regards Bartosz + +Hi Bartosz, What's the LED configuration for your test set up? I'm considering maybe it has triggered maximum duty cycle limitation for low Vin and high Vout. Your ISET is too high, and you have set the current to about 32mA for each channel? You 'd better change the output current of each channel above 50mA. Have triy with ISET=98k. BR Sean + +OK, I made next test, I back to proposed in DS values (200k/182k/24.9k) for which my test setup work. Exchange resistor to 74.5k to have 65mA and plug one of the finall led string which works under 65mA and 47V, nothing happen (old one also with this resistor still works). PWM duty 50%, 5V, 222Hz. + +Hi Bartosz, This is really strange and I don't have much more comments now and please do more test and hope you can find that something that leads to this issue. Anny update please let me know. BR Sean + +Thank you, next test. I build string array with +/- same voltage. Try to start => nothing. But when I take half, TPS start, then I take next and next and finally whole string works. Then change to final leds and also strart. But if discharge (eg touch output by finger), nope. Where could be a probem ? I try with differ inductor (~ same value, but I start from cheap one then use let say better). Power supply (standard lab ax-6003p) ? Any other idea of test will be welcome ! Best Reagrds Bartosz Reichel + diff --git a/data/text/DLP3/898922 b/data/text/DLP3/898922 new file mode 100644 index 0000000000000000000000000000000000000000..dd6a8cc31e9df505a9d7a00105d6688e3f207d38 --- /dev/null +++ b/data/text/DLP3/898922 @@ -0,0 +1,18 @@ +TPS63802: Can't make this part work. + +Part Number: TPS63802 Hello, I've designed a board that uses a TPS63802. Its input is the output of a BQ24073, which, as I'm sure you already know, is a battery management IC able to automatically adjust the power path depending if the battery is charging or not. From the voltage output of the BQ24073, which may be 3.7V or 4.8V from USB, I need to get 5V. I've chosen the TPS63802 because the max input would be too close from the desired output for a boost regulator to work. Thing is, I've already burnt 6 pieces of it. No matter what I do, the moment I pull the EN pin high, the IC gets instantly hot and the output fixes at 0.4V. I've checked solders, the rest of the circuit, etc. and even done several tests on a naked board where I only soldered this IC an related passives, all with the same results. This is the layout (please note it's the bottom layer of the PCB): Note VOUT_BAT net is the output of the BQ24073. Feedback resistor values are 806k and 91k respectively, as the datasheet states. Inductor is LQH32PNR47NNCL from Murata, I believe it meets the requirements. Input and output caps are CC0603MRX6S5BB226 from Yageo, 22uF. Can anyone lend a hand? I'm really desperate about this :( Best regards, Enrique + +Hi Enrique, Thank you for reaching out. Just to double check, this is the bottom layer seen from top? I see two potential causes for the device to fail: The minimum recommended output capacitance for Vout = 5 V is 7 μF. For CC0603MRX6S5BB226, the effective capacitance at 5 V is only 6.6 μF, which is below the minimum recommended. For Vout = 5 V we recommend using 2x 22 μF. Otherwise the device can become unstable, leading to oscillations and failure, especially when coupled with the second point below. The PCB layout, or the GND routing to be precise, needs significant improvements. Please see the recommended layout in the datasheet and try to follow it as close as possible. In short: First place the input and output capacitors as close as possible to the device. Connect the GND ends of the input/output capacitors, GND and AGND pins directly, under the device. Adding multiple vias is recommended to improve the GND plane impedance and thermals. Place and route the feedback divider. Route all other signals like PG, EN etc. in the end, these are not critical. We cannot stress enough how important is the PCB design for switch-mode converters. Here are some guidelines for a proper PCB layout for boost converters, the same is valid for a buck-boost converter that will operate in boost mode for the most of the time: /lit/an/slva773/slva773.pdf Best regards, Milos + +Hi Milos, thanks your your answer. It has given us a bit of insight about this. I've done a few more tests on the PCB I have before making a new one. I've put 4 capacitors on the output and 2 on the input, and found the IC did not burn and gave a fixed voltage of 0.81V (couldn't check the ripple with an oscilloscope because of the Covid lockdown, it's in our lab and I can't get it). Since that was even more strange, I checked the values of the feedback resistors. It seems there was a mix up with the bags and instead of 806k there was a 56k one mounted, so, using the output voltage formula present on page 19 of the datasheet, it gives 0.8076V. It matches with the test. I replaced the 56k resistor for the correct 806k one and... the IC burned again. It really seems like an stability problem, so I decided to use another, lower value resistor to try to get a lower output than 5V. I used 499k, that should give a voltage pretty close to 3.3V. The result was that the IC did NOT get destroyed, but the output was oscillating between 2.6 and 2.8V. Another important thing I forgot to mention, all this tests have been done without any load. The expected load on the final circuit should be on the hundreds of milliamps at peak (maybe 500 - 600 mA), and an average of 50 - 60 mA. Maybe it's the inductor? Do you think we should replace it for another? In any case, I will redo the layout improving the grounding so you can kindly check it before manufacturing. Best regards, Enrique + +Hi Enrique, Thanks for the additional info. I doubt that the inductor is the issue here. We have tested the device with lower Isat and higher DCR inductors, and did not see any problems, except for the lower efficiency or lower maximum output current. Could you please show us the output voltage oscillations that you mentioned? Note that in power-save mode (MODE pin set to low, see section 8.4.2 of the datasheet) you should expect the output voltage ripple of around 100 mV. If this is critical, you should operate the part in forced-PWM mode (MODE pin set to high). You can also change the mode during operation, and switch between high efficiency and low noise. And yes, also please send is the updated PCB layout for review. Best regards, Milos + +Dear Milos, I've redesigned the layout. Please check if it seems better: I placed GND plane + vias under the IC, removed the copper between the inductor's pads, added an extra footprint for a second output capacitor and moved them right at the output of the IC. I also moved the feedback network. Regarding MODE pad, I've put a closed solder bridge to GND so I can test if it behaves better on power safe or continous PWM mode. Thank you, Enrique + +Hi Enrique, Looks much better now. Additionally, I would rotate the input capacitor and move it close to the IC. This will reduce the input current loop, which is important when the device operates in buck or buck-boost mode. Best regards, Milos + +Hi Milos, I've just received the modified PCBs and wanted to let you know it all works as intended. It was the first time I worked with this type of regulators, so I'm taking it as a lesson learned. Thank you again, Enriquue + +Hi Enrique, I'm glad it worked out in the end. Let us know if you need any further help. Best Regards, Milos + diff --git a/data/text/DLP3/898926 b/data/text/DLP3/898926 new file mode 100644 index 0000000000000000000000000000000000000000..b474f5f26616a5700d1275a2a31d314e3e5b71a3 --- /dev/null +++ b/data/text/DLP3/898926 @@ -0,0 +1,6 @@ +BQ25505: Ultra-low power operation + +Part Number: BQ25505 We designed an energy harvesting device that will generate 0.6V at 100nA (similar to another question on the forum). We could stack several devices to get >2V but are not sure if we can support the BQ25505's total power input requirements. Have several questions about the quiescent current, Vin and Pin. Quiescent current: Average is 325-400nA when Vin is 0V, and Vstor is 2.1V. Over what time period is the 325nA average taken? Is this current approximately continuous or is there a duty cycle? If duty cycle, is it fixed or programmable? Does the BQ circuitry draw that current from any source tied to Vstor (such as a supercap on VBAT_SEC meant to service the load)? If VSTOR < VSTOR_CHGEN, and Vin is 0 or <100mV, how does this affect quiescent current? Is the circuitry effectively ‘off’ at this point until Vin>Vin(CS)? If the circuitry draws current from VSTOR, and the circuit is effectively off when VSTORVSTOR_CHGEN and Vin=0? Quiescent Current Range: With the duty cycle time in ms, my assumption is that the quiescent current draw is effectively 325nA, but what is the actual range of the quiescent current (0-1uA for example)? We could handle 1uA, for example, with a very low duty cycle (e.g., 1% or less). What is the duration of the current draw at the high end of that range (for example, 0.2ms at 1uA)? Datasheet changes The datasheet for the BQ25505 for the evaluation board we bought has been revised since then (version dated September 2013). The most recent revision (Rev F dated March 2019) has some important differences. Vin for cold start changed from 330mV(MIN) to 600mV(TYP)/700mV(MAX). Does this reflect a correction to the specifications or is it a design change? If we order more chips, will they have a 700mV worse case for cold start/normal charging? Same question for minimum power input for cold start and normal charging. Old Pin was 5uW, but the most recent version says it’s 15uW. Voltage and Power Requirements: To make sure I fully understand the Vin and Pin requirements - The Rev F datasheet states Vin of 600mV (TYP). However, my BQ25505 evaluation board successfully enters the cold start and booster charging state with just 340mV. So, again, does the datasheet change reflect a correction to the cold start Vin voltage spec or is this a chip design change (i.e., higher cold start V) that must be considered if we use current production BQ25505 chips? Is the Pin minimum of 15uW (per new DS) a hard number? For example, 15uW would require Iin of 45uA @ 330mV. If we managed to design with an input of >0.6V but with current less than 300nA, could we still meet the Pin requirements using the formula in the datasheet? If 15uW is a hard minimum for Pin, then that is effectively an Iin minimum of 8uA (or 25uA new) @ 0.6V. Thanks for your help in understanding how the BQ chip works and if we can utilize it in our design. + +Hi Larry, Regarding 1, average time for the Iq measurement is about 2-3 seconds. All measurements are for the boost converter not switching. Regarding 2, measured Iq includes the VRDIV sampling for 4ms every 64ms, during which time the Iq is slightly higher. Otherwise, Iq is constant. Regarding 3, yes, VSTOR powers the chip from whatever source is at VSTOR = VBAT if the internal PFET is closed. Regarding 4, when VSTOR < VSTOR_CHGEN, the main boost circuitry is off so VSTOR doesn't pull Iq. The charger tries to raise VSTOR and VBAT through the internal PFET body diode to VSTOR_CHGEN using the cold start circuit, which is a very low efficiency boost converter. We did not characterize its Iq. Regarding 5, when VSTOR>VSTOR_CHGEN>VBAT_UV, the PFET between VSTOR and VBAT automatically turns on and allows the storage element at VBAT_SEC to power whatever load is at VSTOR, including the IC itself. Regarding Iq range, see d/s figures 8 and 9 for average Iq range. Keep in mind these are for the boost converter not operating (i.e. no input power source). When switching due to input power source, the Iq is higher in order to drive the boost converter FETs. Regarding datasheet change and VIN, PIN requirements, there was no spec change. We found an error in our production testing and discovered we can not consistently produce devices that startup with cold start down to 330mV and with such low PIN. Some devices operate down to 600mV in cold start, especially after sitting for long periods without power, but we cannot warranty that all devices will. The PIN_CS number is typical value and is not tested in production. I have seen the device operate in cold start with much less than 15uW. The value is more of practical number in order for cold start to raise VSTOR =VBAT_SEC to VSTOR_CHGEN in a reasonable time frame. In order to exit cold start (i.e. charge VSTOR up to VSTOR_CHGEN) I always recommend to isolate any resistive loads connected at VSTOR using an external PFET with gate drive by /VB_SEC_ON. Also, you have to consider the leakage current of your storage element, especially if it is a super cap. Regards, Jeff + diff --git a/data/text/DLP3/898927 b/data/text/DLP3/898927 new file mode 100644 index 0000000000000000000000000000000000000000..59979ff5ebe045437fe0b250fab12a94e8fd9fb4 --- /dev/null +++ b/data/text/DLP3/898927 @@ -0,0 +1,8 @@ +LM61460-Q1: Design calculator + +Part Number: LM61460-Q1 Hi, I`ve worked with the document TPS2663x _TPS1663x_Design_Calculator_revB and I wanted to know if there is a similar design calculator for "LM61460-Q1". Thanks, Dudi. + +Hello We have a calculator tool for this product under development at this time. I will ask the engineer responsible when this tool will be available and get back to you shortly. Thanks + +Hello I have attached the calculator here. Thanks LM61460 Design Tool.xlsm + diff --git a/data/text/DLP3/898930 b/data/text/DLP3/898930 new file mode 100644 index 0000000000000000000000000000000000000000..334d065d9375f7ce2715b6a5f4f133517c01a7de --- /dev/null +++ b/data/text/DLP3/898930 @@ -0,0 +1,24 @@ +LM3410: LM3410 VFB is Low + +Part Number: LM3410 Hello, Exact p/n: LM3410XMYE/NOPB in MSOP-8 with thermal pad. I am having issues getting this circuit to behave as expected. I have checked for shorts between each of the pins, and that seems OK. Vin = 3V with Vf(min) = 5V for the LED. For now, the protection circuit has been removed (R13 = 0R, D3 is removed). I notice that Vled measures as 5V (so it is boosting) but the current draw isn't right. With Rfb=390mOhm I would expect that Iled=500mA. But I'm seeing a total current draw of 120mA, including all the other circuitry on the board. So something isn't working right. And I measure about 15mV at pin 5 (FB). I believe that should be around 200mV. How could that be lower? P3 is a 2-pin jumper, right now shorted out. Eventually, I'll use that to verify the LED current. Here is a screenshot of the schematic: Below is a scope shot of the inductor voltage (pin 7): Any pointers on where to look to figure out why the current isn't right? James. + +Images didn't get pasted in. Here they are again... Inductor Current: Schematic Snippet And R15 is NOT installed... + +Hello, Are you measuring fb from the IC GND to pin 5? Have you looked at the input voltage to make sure it is not drooping? The switching frequency is below 800 KHz, something isn't right there either. Does you layout have a solid ground plane? What is the ground connection on the LED? If that is the heatsink pad check to see if it is isolated. I don't see anything wrong schematic wise. What is LED ON/OFF doing? Best Regards, + +Yes, measuring FB to GND measures about 15-20mV when the device is on. LED_ON/OFF is generally static, though there is a case where it's on for 4 seconds then off for 4 seconds. Driving with GPIO of MCU, going pretty close to rail-to-rail when driven. Yes, all routing on top layer. Bottom layer is solid GND. 5 GND vias on center pad to get heat to 2oz bottom plane, though there isn't much of that right now. The LED seems to be connected correctly with GND connections actually connected to GND. Right now I am powering from a power supply with current limit set to 1A. Just tried setting the current limit to 2A, in case there was some sort of spike of current required. But same behaviour -- takes about 100mA @3.5V, where it should take somewhere around 2.5-4W for the LED (0.5mA @ 5-7V). I double checked the pinout in the routing, to make sure pin numbers didn't get messed up on the PCB, but that all looks good too. James. + +Hello James, On the LED there is a ground connection per the schematic. The anode and cathode are not tied to ground that's what I was asking, is the GND connection isolated from the other two connections? You can try increasing the input voltage to 4V or so just to see if it behaves different. Are you measuring the voltage at the input of the LM3410? How is the supply connected to the board? Are you using an oscilloscope to measure FB or something else? Best Regards, + +Hi Irwin, Yes, that middle connection on the LED is a thermal pad that is electrically isolated from the rest of the part. Right now the LED is right off the board, soldered with wires, so the middle pad is not connected at all. So that's not involved here I don't think. I tried bringing VIN all the way up to 5V without any real difference in results. I thought if maybe the inductor was saturating and that a higher input voltage would reduce the current required. But no luck. And yes, I am measuring at the input of the LM3410. The cable to my power supply isn't too long or skinny, and distribution on the PCB is good, certainly good enough for just ~1A expected in worst case. But good question. I've measured the FB with both oscilloscope and multi-meter. Both give values around the same value. And I've confirmed that I have the part I think I do soldered on. The markings are SSXB which, according to the datasheet, is the LM3410XMY that I intend. Attached is a scope shot of the FB node, with very short ground loop so as to not induce extra ringing. This is with DC coupling, so you can see the average is about 23mV, but there is a very definite noise pattern: Strange indeed. + +I should mention, that this last scope shot was with a 6.8uH inductor that is rated up to 3.9A (XAL4030). It has a higher current rating then then 10uH I was using and I think that's a better value anyways. But I still can't get more than about 100mA out of it and the FB voltage is messed up. + +I just removed the LED, R12, and R13 and confirmed that the FB node is not shorted to GND (hard to tell with 0.39 ohm resistor). Then soldered back on the components one by one and ensured there is no hard short. Next step is to replace the LM3410. Maybe I connected or removed P3 jumper live during debugging and fried the circuit ??? Not sure what else to try at this point. + +Hello James, I would recommend turning the band width limiter off though that is not your problem. I don't think the inductor is saturating, I checked the part and it seemed okay from a quick look. I may go back and check the part out better since I haven't used that inductor family before. The last waveform doesn't make sense from both the frequency and also the wave shape, it should be current ramping up and down, triangular (though that can be from the output capacitor). One thing you can try is to increase the current sense resistor value up to regulate a much lower current to see if it starts to regulate and switch at the correct frequency. One other thing, is the LED emitting light? What is the part number of the LED or if you have the datasheet? Perhaps the load is an issue? Best Regards, + +So I swapped out the LM3410 with a new device and things make a lot more sense. Turning on the LED causes Vf~7.5V (which is expected) with a current draw at the power supply of ~1.2A (so ~4.5W). My conclusion is the LM3410 device was damaged. Likely from dynamically removing the jumper while the LM3410 was on. Thanks for your help. + +Hello, Yes, that would damage the part, hence the OVP zener for OVP protection. Best Regards, + diff --git a/data/text/DLP3/898931 b/data/text/DLP3/898931 new file mode 100644 index 0000000000000000000000000000000000000000..1bca1ed80ce93a16b1602fb3adcb4a66146bad69 --- /dev/null +++ b/data/text/DLP3/898931 @@ -0,0 +1,6 @@ +LM3880: LM3880 + +Part Number: LM3880 i wanna ask you guys about the resistor devider that could placed with the EN pin. what it is for ? how do we choose the values efficiently ? + +Hi There is 7uA current source at the EN pin, you have to take this into consideration when selecting the resistor to ensure that Vcc_enable=1.22V[1+(Ren1/Ren2)] - 7uARen1 Regards Yihe + diff --git a/data/text/DLP3/898944 b/data/text/DLP3/898944 new file mode 100644 index 0000000000000000000000000000000000000000..1fce0ceaa2ec154d67fe7cae567bc0949f6cc5e6 --- /dev/null +++ b/data/text/DLP3/898944 @@ -0,0 +1,14 @@ +BQ27750EVM-837: Reliable source of bqz / srec files for bq27750? + +Part Number: BQ27750EVM-837 I'm trying to get up and running with the BQ27750EVM-837 for a design with the bq27750, but it has been very frustrating so far. I can find bits of pieces from forum posts with attached bqz or srec files, but nothing on the actual product page. The EVM user guide says "the user can update the firmware using the latest .srec file for the device downloadable from the product folder of the gauge at " + +Looks like the forum cut off some of my post for some reason. Can someone point me to a regular download place for the bqz and srec files? I also found a link on to bq27750FirmwareBundle-0.05-windows-installer.exe , but Windows doesn't want to run that for me because it is apparently unsigned. Running an unsigned EXE posted to a forum sounds like the beginning of a bad day. + +As far as I know, these firmware bundle installers in are all not signed. Andy + +Andy Liu (BMS) As far as I know, these firmware bundle installers in are all not signed. Andy I would feel better if the link to it was on a regularcompany product page instead of just being attached to the forum. Not saying you have any role in the post I saw or control over the website. Just appealing tocompany to make these files easier to find and more trustworthy when found. + +I see my colleagues are working to add a link to the firmware in the product folder. + +I don't see the bqz or srec files posted to the product page yet, so I don't think this issue can be marked as resolved yet. + diff --git a/data/text/DLP3/898945 b/data/text/DLP3/898945 new file mode 100644 index 0000000000000000000000000000000000000000..525e96933d3c03102ee672e0d18d3fa0d3a3780a --- /dev/null +++ b/data/text/DLP3/898945 @@ -0,0 +1,22 @@ +BQ20Z655-R1: BQ20Z655-R1 charge and discharge control. + +Part Number: BQ20Z655-R1 Hi guys. I want to ask something. I am using BQ20Z655R1 and i did the following steps in order; 1- Select the .SENC file. 2- Configure the data flash. 3- Calibrate the board without battery pack. 4- Connect battery pack. 5- Enter QMAX value (I know QMAX value). 6- Enable IT. 7- Charge the pack to full !!! But at this point I got stuck. I can't charge the pack. I don't understand what to do. Does the BQ20Z655 have a battery charging feature? if so, is it necessary to apply a constant voltage (between 6V and 25V according to the application note) between p + and p-? I tried this, but I cannot charge the batteries. Charging fet do not turn on. I also cannot discharge the battery. I am connecting a constant load between p+ and p-. But discharge does not start. I think the system doesn't wake up from shutdown mode. I had previously opened a topic. Schema, pcb and other information can be found here. /support/power-management/f/196/t/872879 Could you please, an you help me? Best regards. + +Hi Ahmet, Could you update a screenshot of the SBS tab? I want to see the Flag / Status Bits. Thanks. Andy + +Hi Andy. This is a SBS table ==> https://imgur.com/98jgTkh + +The OT2D bit in Safety Status 2 is set. I see you left the TS2 pin float. Try setting the OT2 Chg Time zero. Andy + +Hi Andy. You are right. Discharge time of 2nd thermistor (OT2 DSG Time) is set to 2. I changed to "0". New SBS table is here ==> https://imgur.com/68D2NVK But I set the temp1 and temp0 (Operation CFG A) bits so that only the 1st thermistor was on. In this case, shouldn't TS2 be passive? ==> https://imgur.com/eCd7kYh But the problem is still not solved. I can not charge and discharge. I set the NR bit in Operation CFG B register and deactivated the PRES pin in first data flash arrangements. Not worked. Then I activated the press pin and tried again. But not worked again. + +Hi Andy. Discharge is working. I changed the operation CFG B bits. NRCHG ==> 1 and NR ==> 1 But charge is not working. I am using max1737 battery charge control IC. Can there be a mismatch? Second problem, I connected a 2 amp load between p + and p-.It worked for about 1 hour and 15 minutes and the battery was completely exhausted. But the discharge did not stop. Finally, the CUV error was activated. I did not fully understand this part. Shouldn't the discharge stop at a certain point (for example. %5 capacity) ? bq20Z655 does not control this situation? Best regards. Edit note: I still could not find how to stop the discharge at the point I want (eg 10%). But I realized that, there are "TDA Set %" and "FD Set %" variables in SBS Configuration. These variables are as follows; TDA Set % ==> 6 TDA Clear % ==> 10 FD Set % ==> 2 FD Set % ==> 5 While discharging the batteries, i saw that the "TDA" bit in "Battery Status" is active when the battery capacity drops to 6%. But discharge did not stop. On the other hand, there is a "CHGFET" bit inside the "Operation CFG B variable. With this bit, we can link the charge fet's response to the TCA alarm. If this bit is set, the charge FET turns off when the TCA alarm is active. In any way, can we connect the discharge fet to the TDA alarm? + +The discharge FET will not turn off to stop the discharge since the discharge current is high. Are you doing the learning cycle? I suggest you disconnect the load when the terminate voltage is hit. Andy + +Hi Andy. I don't know what the learning cycle is. I just follow the steps in the application notes. 1- Select the .SENC file. 2- Configure the data flash. 3- Calibrate the board without battery pack. 4- Connect battery pack. 5- Enter QMAX value (I know QMAX value). 6- Enable IT. 7- Charge the pack to full. 8- Let it relax for 2 hours. 9- Discharge the pack to the minimum acceptable voltage. 10- Let it relax for 5 hours. 11- Repeat steps 7 through 10 to achieve maximum impedance table accuracy. Is this learning cycle? You also said "I suggest you disconnect the load when the terminate voltage is hit". Did you mean "Term Voltage"? If yes, Term voltage is 12000mV. How do i stop the discharge using this? + +Hello, Please use GPCCHEM as a first step. Then refer to learning cycle app note on for the second step. Thanks! + +Hi kang. You said that; "Please use GPCCHEM as a first step." is this step used to determine the chemical data of the battery? I'm just asking because I'm curious.I have the battery's technical document and MSDS reports. I am using the LG ICR18650 battery and chemical ID code is 0100. Should I still create a data og file using GPCChem? If your answer is yes, I will prepare and send the necessary files (config.txt and romtemp_rel_dis_rel.csv). + diff --git a/data/text/DLP3/898947 b/data/text/DLP3/898947 new file mode 100644 index 0000000000000000000000000000000000000000..fe2a53b0fddd3f68589b0f197ec75aef594134a3 --- /dev/null +++ b/data/text/DLP3/898947 @@ -0,0 +1,16 @@ +BQ40Z50-R2: BQ40Z50-R2 Average Current + +Part Number: BQ40Z50-R2 Hi, I'm having some questions about the average current measurement. What is the sample period or number for AverageCurrent() measurement? Or how many Current() values if used are contribute to the AverageCurrent() measurement? Another question is for Avg I Last Run. Is this the average current of entire last discharge period or just the last updated average current? Thanks, Zhihan + +Hi Zhihan, Let me take a look at the firmware code and then get back to you. Andy + +Hi Zhihan, See my answers below. What is the sample period or number for AverageCurrent() measurement? Or how many Current() values if used are contribute to the AverageCurrent() measurement? [Andy] The AverageCurrent() is based on the Current() and is calculated once per second. A filter like the one below is applied to the Current() to get the AverageCurrent(). y[n] = α y[n - 1] + (1 - α) x[n] Another question is for Avg I Last Run. Is this the average current of entire last discharge period or just the last updated average current? [Andy] It should be the average current from the last discharge cycle. Andy + +Hi Andy, Thank you very much for your answers! For the equation, y[n] = α y[n - 1] + (1 - α) x[n], I assume y[n] would be the AverageCurrent() of current second, y[n-1] is AverageCurrent() of previous second, and x[n] is Current() of the current second, right? For Avg I Last Run, is this value related to AverageCurrent() algorithm? Let's say from last cycle, we have 100 Current() and AverageCurrent() values. So for Avg I Last Run, the value would be Sum[Current]/100 or the 100th AverageCurrent() value? Or maybe neither? Thanks, Zhihan + +See my comments below. For the equation, y[n] = α y[n - 1] + (1 - α) x[n], I assume y[n] would be the AverageCurrent() of current second, y[n-1] is AverageCurrent() of previous second, and x[n] is Current() of the current second, right? [Andy] Correct. For Avg I Last Run, is this value related to AverageCurrent() algorithm? Let's say from last cycle, we have 100 Current() and AverageCurrent() values. So for Avg I Last Run, the value would be Sum[Current]/100 or the 100th AverageCurrent() value? Or maybe neither? [Andy] Sum[Current]/100. + +Hi Andy, Thank you so much for your answer! I have one more question about the AverageCurrent() algorithm. According to SMBus Data Specification v1.1, AverageCurrent() is returning 1 minute rolling average based on current, which seems to be different from the filter you gave me. Is there any particular reason that you decide use a different filter from SMB data spec? Thanks again for you help! Really appreciate it! Zhihan + +Hi Zhihan, Unfortunately, I don't have a good answer to that question. As far as I can tell, the algorithm that calculates the AverageCurrent() is not invented for this part. The same implementation is probably inherited from some old parts. Andy + diff --git a/data/text/DLP3/898955 b/data/text/DLP3/898955 new file mode 100644 index 0000000000000000000000000000000000000000..a682697a17aa99bcd351ecacbec64afa2aba3051 --- /dev/null +++ b/data/text/DLP3/898955 @@ -0,0 +1,8 @@ +TPPM0301: Similar device + +Part Number: TPPM0301 Hello Guys, Good day. Our customer is looking for a device similar to TPPM0301 but has output current of 1.0 to 1.5A and has multiple input VIN too. For the multiple input VIN, I think he is referring to the 5VAUX and 3.3VAUX input sources of the device. There are a lot of LDO that meets his output current requirement but i can't seem to find one that has multiple input VIN. I would appreciate it if you can lend your assistance regarding this. Thanks in advance! Art + +Hi Art, Unfortunately we don't have anything in in that current range that can support 1-1.5A with multiple input and 1 output A possible option is to use our new TLV752 device which can support 1A and has separate EN pins. You could toggle between the two channels with a FET. Or to use two single LDOs - TLV757P. regards, Wilson + +Thanks Wilson! Art + diff --git a/data/text/DLP3/898964 b/data/text/DLP3/898964 new file mode 100644 index 0000000000000000000000000000000000000000..dc1cc3ffbd4dcfb43c5bc76ba0fb235c0553eb36 --- /dev/null +++ b/data/text/DLP3/898964 @@ -0,0 +1,6 @@ +TPS2051B: reliability with external 5VDC applied to the output + +Part Number: TPS2051B Can the TPS2051B be potentially damaged when 5VDC is applied to its outputs and the device is not powered? I am curious for the transitions not only on the output, but also on the power of the TPS2051B itself. Could there be any specific case that could create a damaging operating condition for the device? I understand that the TPS2051B may or may not prevent reverse current in case the outputs have 5VDC applied to them (it will depend on the enable pin). That is not a concern for this application however. Thank you! + +Hi, The ABS of TPS2051B is 6V. It will not break the part with 5V at output. 1. Don't be out of the range of spec. 2. Input and output cap should be added as required by datasheet. For TI's policy, I will first click resolved button. If you have any other concern, contact me any time. If you think resolved, please help click 'Issue is solved button'. Thanks. + diff --git a/data/text/DLP3/898966 b/data/text/DLP3/898966 new file mode 100644 index 0000000000000000000000000000000000000000..c31f4fb3acbb741e8dd06f163ff4f8027c703a48 --- /dev/null +++ b/data/text/DLP3/898966 @@ -0,0 +1,6 @@ +UCC24612: Gate - Source Waveform from controller + +Part Number: UCC24612 Why is the gate - source voltage > 20 V in the SIMPLIS simulation when The Functional Block Diagram shows the highest voltage is 9.5V due to a linear regulator? Why can't SIMPLIS complete a POP Analysis with the UCC24612? I get an error saying there is a problem with a C10 internal to the UCC24612. See the attached PowerPoint for the details. Thanks!Errors with UCC24612 Simulation.pptx + +Hello Thomas, Thank you for your interest in the UCC24612 SR controller. The gate drive gets its charge from the REG node inside the IC, and is normally 9.5V. In your simulation set-up, however, you have set an initial condition of 22V on the REG filter cap C3. So the VG output will follow the REG voltage from 22V down to 9.5V eventually, as the charge is transferred from C3 to the Fet gate over many switching cycles. I recommend that you set IC for C3 to 8V, and IC for C1 to 10V (which is your bias source voltage). The POP error message indicates that it is unable to find a repetitive value for an internal capacitor C10. I was able to investigate this cap and found that it is a timer cap of 1pF charged by a 1uA current source to a 2.2V threshold on a comparator that discharges it with a 1-ohm transistor. I believe that this sub-circuit can achieve a periodic value but requires more than 20 cycles to settle to the satisfy the POP accuracy criteria. These criteria can be changed in the POP analysis dialog box. I recommend that you either increase the number of cycles allowed to find the POP or reduce the required accuracy of the repeating value, or both. Regards, Ulrich + diff --git a/data/text/DLP3/898974 b/data/text/DLP3/898974 new file mode 100644 index 0000000000000000000000000000000000000000..0aaee3799cae5bd5c4de17e3d1bd2bb183b6877e --- /dev/null +++ b/data/text/DLP3/898974 @@ -0,0 +1,6 @@ +BQ76940EVM: Schematic ,PCB Editable file is required + +Part Number: BQ76940EVM EVM SCHEMATIC , PCB and Gerber editable file is required. + +Hi Packia, The BQ76940EVM files are available as TIDA-00255 the design files are available as a starting point for a design. + diff --git a/data/text/DLP3/898982 b/data/text/DLP3/898982 new file mode 100644 index 0000000000000000000000000000000000000000..b08ca4512ff981aae922a356e1d06b552a9a05e4 --- /dev/null +++ b/data/text/DLP3/898982 @@ -0,0 +1,10 @@ +BOOSTXL-TUSS4470: Confirm if this device can detect impurities in milk products and other beverages + +Part Number: BOOSTXL-TUSS4470 Hi Team, Our customer is interested in ordering BOOSTXL-TUSS4470 but would like to know if the following application is possible for this device: Does BOOSTXL-TUSS4470 can be used for milk impurities, if yes "How to select the frequency" The second question is can we also do the same for "impurities in beverages" The customer application is related to this link below but they will use it for milk and beverage products: https://www.youtube.com/watch?v=3rxHC4dU77c&feature=youtu.be Please let me know if you have other questions for the customer. Thanks! Jonathan + +Jonathan, Yes, in general, the TUSS4470 can be used for concentration / impurity measurements. This type of measurement is achieved by mounting the transducer on the side of the container, and making a side-to-side fixed distance measurement to monitor changes in the the time of flight. The time of flight changes due to the transmission medium properties. In this case, milk is the transmission medium, and the addition or lack of impurities will either increase or reduce the speed of sound, thus affecting the time-of-flight. The longer the fixed distance measurement, the more accurate the measurement will be. Using a high-frequency transducer (>200kHz to 1MHz) is required for this type of application since the measurement distance is assumed to be relatively short (<1m). What are the expected impurities in milk? It is important to understand ahead of time if the amount of impurity and the impurity type itself will yield a significant enough of a change in the speed of sound for a time of flight change. If the impurity has identical transmission medium properties (i.e. same speed of sound as milk), then ultrasonic cannot be used for milk impurity detection. + +Thank you so much for the response. It is indeed helpful. In general, we do not want to limit the impurity type here. We would like to keep it more general (typical ones are if the milk viscosity is modified or solid material is there). Should we use closer to 1M or 200k or should be somewhere in the middle is there. If I am not wrong, sound \lambda (wavelength) decreases as we increase frequency (speed of sound = lambda * frequency). Is there any advantage to select a particular range of frequencies? (Also how do we select the pulse width)? Any advice on the rule of thumb is indeed useful? We may also need to buy the corresponding transducer? Should we select any arbitrary transducer in (>200k and <1M)? Any information regarding this is really helpful? Thank you + +Tadilo, We don't have enough expertise in this particular application to recommend a specific transducer frequency. In general, as the transducer frequency increases, the accuracy increases, but so does the rate of attenuation. Thus, high frequency transducers are ideal for short range high accuracy applications. Depending on how large your container is, you may want to start with a 200 to 500 kHz option to ensure you are able to maximize the detectable range. Try contacting some transducer manufacturers to request their support/recommendation based on your application, as some transducers are designed for specific applications. Here is a list of example transducer part numbers and manufacturers: PGA460 Transducer & Transformer Listing + diff --git a/data/text/DLP3/898988 b/data/text/DLP3/898988 new file mode 100644 index 0000000000000000000000000000000000000000..7c57c5a29f737f809ac11c92d341507463780652 --- /dev/null +++ b/data/text/DLP3/898988 @@ -0,0 +1,16 @@ +BQ24770: 1S clamped current + +Part Number: BQ24770 Hello, We have a 1S configuration. We would like to charge at high current when BAT is below BATLOWV threshold, bypassing pre-charge and fast-charge clamps. Can we do this by setting SYSMIN (min sys voltage). If not, is there another register setting for this? From datasheet section 8.6.6, for reference: For 1s charging, the charge current is clamped at 384 mA when battery is below BATLOWV threshold. When battery is between BATLOWV and SYSMIN, the charging current is clamped at 2 A. When battery is above SYSMIN, the charging current follows register setting. Thank you. + +Hi Scott, Unfortunately, there is no clean way to do this. With a 1s configuration, when VBAT < BATLOWV, the pre-charge current is clamped to 384 mA. How high of a pre-charge current do you need, and may I ask why your application requires this? Our charger ICs use a lower pre-charge current in order to safely charge a deeply discharged battery. In many applications, the battery pack has a protector circuit which opens when the battery voltage falls below ~3 V anyway, so the battery should only spend a short time in the pre-charge phase before being fast charged. Best regards, Angelo + +Hi Angelo, Thank you for writing back. We have a LiFePO4 cell that may get introduced to the charger at 2.5V (Also our protection ckt. limit). We need 4A to charge the cell in our required time, and also need the flexibility to increase the rate in certain situations. Any pre-charge would need to be short lived and as high as possible. The BQ24770 fast charge stage (2A) is too low as well. The trip from 2.5V to BATLOWV then to SYSMIN kills our time budget. Feel free to ask any more questions. Thank you, Scott + +Hi Scott, Understood, thank you for explaining this. It sounds like a different charger IC may be a better fit for your requirements. Can you please answer the questions below so I can provide further suggestions? Need to charge a 1s LiFePO4 battery At least 4 A charge current Must charge as fast as possible even when the battery voltage is only 2.5 V Charger IC should be host-controlled in order to flexibly change charging parameters on the fly. Do you have a preference between I2C and SMBus communication? What will be the input voltage to the charger IC? Will there be a system load connected to the charger IC output? If so, how much voltage and current will it draw? Any other requirements? Best regards, Angelo + +Hi Angelo, Need to charge a 1s LiFePO4 battery YES At least 4 A charge current YES; 8A MAX Must charge as fast as possible even when the battery voltage is only 2.5 V YES Charger IC should be host-controlled in order to flexibly change charging parameters on the fly. Do you have a preference between I2C and SMBus communication? Host-controlled for charge, charger/host "left behind" when load on battery power. SMBus preferred, not critical. What will be the input voltage to the charger IC? 12VDC Will there be a system load connected to the charger IC output? If so, how much voltage and current will it draw? YES: Switcher capable of 2V-5V IN; 3.3V out, 40mW max. load. Thank you again for your attention on this. Scott + +Hi Scott, Thanks for the information. I believe the simplest solution for your application is a charger from the BQ2419x family, such as the BQ24193. The charge profile is shown below. Here are some key BQ24193 parameters that are relevant to your application: Maximum input operating voltage = 17 V Max charge current = 4.544 A Max precharge current = 2.048 A VREG can be set as low as 3.5 V to accommodate LiFePO4 batteries. The Default BAT_LOWV threshold is 3 V, but this can be changed to 2.8 V through I2C control. Therefore, the BQ24193 will apply the 2 A precharge current until your battery rises above 2.8 V, at which point the full fast-charge current will be applied. The NVDC topology makes it easy to regulate the VSYS rail for your system load. With a traditional topology charger, VSYS can go as high as your adapter voltage (12 V), so you would need a separate buck converter to step VSYS below 5 V. Best regards, Angelo + +Thank you for your help Angelo, we will look into the device family you recommended. Scott + diff --git a/data/text/DLP3/898992 b/data/text/DLP3/898992 new file mode 100644 index 0000000000000000000000000000000000000000..d79713834cad34ee73eaff1985df9fdc05fe94fe --- /dev/null +++ b/data/text/DLP3/898992 @@ -0,0 +1,6 @@ +TPS63805: Layout for AGND and PGND + +Part Number: TPS63805 Hi Team, If we only use double layer to achieve TPS63805 and there is AGND and PGND in the schematic. What is more appropriate layout method? 1. Use ferrite bead to connect AGND and PGND(same layer) , if it's appropriate, what is the appropriate value? 2. Keep AGND in the top layer and use via to connect to bottom layer. (top layer is Power layer V+) Or any suggestion if only use double layer board. Roy + +Hi Roy, I would recommend connecting AGND to the GND star point through vias and a line in the bottom layer, as shown below: Best regards, Milos + diff --git a/data/text/DLP3/898993 b/data/text/DLP3/898993 new file mode 100644 index 0000000000000000000000000000000000000000..428a1c8ccadf3c7f5c2f0e1b279535b0e374512d --- /dev/null +++ b/data/text/DLP3/898993 @@ -0,0 +1,12 @@ +TPS794: How to make TPS794 output 1.2V + +Part Number: TPS794 HI team, How to make TPS794 output 1.2V, there is no description on how to configure R1 R2 and C1 when need output 1.2V. Could you help to share some comments? Thanks. Regards, Sunny + +Hi Sunny, In the datasheet, on Page 9, equation 2 provides R1 and R2 calculation and the table in Figure 23 also provides two examples for 1.8V and 3.6V outputs. Please let me know if you are having trouble finding the information. Regards, Jason Song + +Hi Jason, THansk for for comments, but for 1.2V output, as it`s same with REF, so is it just should output to FB, and then remove R2 and C1? we need your comfrim. Thanks. Regards, Sunny + +Hi Sunny, To get the reference voltage at the output pin, you may simply short FB to the Output, you don't need to put a resistor(R1) in between. So R1, R2, C1 all can be removed once FB is shorting to OUT. Regards, Jason Song + +HI Jason, Thanks. Regards, Sunny + diff --git a/data/text/DLP3/898995 b/data/text/DLP3/898995 new file mode 100644 index 0000000000000000000000000000000000000000..b76a13f20341b940ece598dde6fdc5ddf3b45c4e --- /dev/null +++ b/data/text/DLP3/898995 @@ -0,0 +1,6 @@ +BQ25898D: About ADC Conversion Rate Selection + +Part Number: BQ25898D hello, Is the current consumption of the IC different between One shot and 1s Continuous? If the current consumption is different, which one has the higher current consumption? In that case, how much mA will increase? best regards + +Hi, Please refer to Thanks, Ning. + diff --git a/data/text/DLP3/899008 b/data/text/DLP3/899008 new file mode 100644 index 0000000000000000000000000000000000000000..a839cc1a62985319f03074b313e62b2ec8679673 --- /dev/null +++ b/data/text/DLP3/899008 @@ -0,0 +1,10 @@ +IWR1443: IWR1443 SDK 2.o + +Part Number: IWR1443 Hello, I'd like to inquire about an incomprehensible phenomenon regarding the internal temperature sensor value of IWR1443. Reading the internal temperature with SDK 2.0 at room temperature, the value of DIG0 is found to be 90℃, which is much higher than other sensors values. All other sensors have values of less than 55℃. Is it normal that the temperature difference is greater than 35℃ at the same Die? If this is normal, we cannot adopt this chip in our application because it easily exceeds the junction temperature 105 ℃ at an ambient temperature of 45 ℃ or more. Best Regards, + +Hi Yunkwon, I believe this is a known issue. We will have more information for you in a few days. Regards, AG + +Yunkwon Jung, This is not expected, It is not normal to have temperate difference greater than 35 Deg C within the die for a typical chirp configuration, Do you see this phenomenon on other IWR1443 devices? or only on one device? We could expect few degree variations across the die, and it could have different values based on number of Tx and Rx configuration and Chirp configurations. It would be good to take average value the all the temperature sensors. Thanks and regards, CHETHAN KUMAR Y.B. + +Dear CHETHAN KUMAR Y.B., Thank you for your comment. We have checked 4 IWR1443 samples at room temperature.. Two samples have temperature difference of 35℃. Another one has 28℃ difference (DIG0 & DIG1 :82℃, the other sensors : less than 54℃). The last one has 21℃ difference (DIG0 & DIG1 :74℃, the other sensors : less than 53℃). Best Regards, YK Jung + diff --git a/data/text/DLP3/899010 b/data/text/DLP3/899010 new file mode 100644 index 0000000000000000000000000000000000000000..15211d87d532c7ace877cc678b50f1770284da00 --- /dev/null +++ b/data/text/DLP3/899010 @@ -0,0 +1,10 @@ +TPS1HB08-Q1: About TPS1HB08-Q1 Current Limit and Thermal Shutdown + +Part Number: TPS1HB08-Q1 Hello all, I could find current limit at 70A and thermal shutdown at 150 degree. When I calculate Junction temp with instruction on the datasheet, Tj = Temp + 32.6 * I * I * Ron = 25 + 32.6 * 20 * 20 * 8m = 170 When peak current is 20A, Junction Temp is over than shutdown limit. Cannot the current be over than 20A? + +Hi, The thermal value RθJA is based on DC values. You mentioned that you were calculating with peak current which may give you inaccurate values for seeing if the operation is valid on the device. So it is correct that if you kept it at 20A, the device would shut off unless the 20A is for a short duration as in the case of inrush currents or short-to-ground which is what allows the device to have high current limits such as 70A. We also recommend using the max RON value when looking at calculating junction temperature (which in the TPS1HB08-Q1’s case is 16-mOhm) + +So, when I recalculate this, 1. At temp=25 Tj = Temp + 32.6 * I * I * Ron = 25 + 32.6 * 15 * 15 * 16m = 142 The limit that device do not shut off is when current I = 15A? 2. At temp=70 Tj = Temp + 32.6 * I * I * Ron = 70 + 32.6 * 12 * 12 * 16m = 145 The limit that device do not shut off is when current I = 12A? Are those correct? Thank you + +Hi, Yes, these would be correct (I calculated about 15.48A at 25C and 12.38A at 70C) assuming that these are will be your steady state current loads. + diff --git a/data/text/DLP3/899019 b/data/text/DLP3/899019 new file mode 100644 index 0000000000000000000000000000000000000000..5f1dc527edfbb1d9d394f5e1296a5f7c162f577d --- /dev/null +++ b/data/text/DLP3/899019 @@ -0,0 +1,6 @@ +TPS62080A: recommend new device which is pin to pin with TPS62080ADSGR + +Part Number: TPS62080A Team Can you recommend new device which is pin to pin with TPS62080ADSGR ? + +Hi Danny, There is NO P2P alternative for TPS62080ADSGR. But, you can consider TPS62821/822 as a possible options. Best regards, Excel tps6282x.pdf + diff --git a/data/text/DLP3/899021 b/data/text/DLP3/899021 new file mode 100644 index 0000000000000000000000000000000000000000..05bceb8e2762e1fc67fb12233c036a07f4889e1a --- /dev/null +++ b/data/text/DLP3/899021 @@ -0,0 +1,6 @@ +BQ76942: where to find the .bqz file for BQ76942 and 952 + +Part Number: BQ76942 Hi, My customer can't find the device support from bqstudio, according to the EVM user guide, there is a .bqz file as below capture img. but I can't find this anywhere, would you please help on this , thansk. + +Hi Yue, You need to use the proper bqStudio version aka BQSTUDIO-TEST. If you click on “get software”, you will see the list of supported devices. BTW another post covered this topic. + diff --git a/data/text/DLP3/899023 b/data/text/DLP3/899023 new file mode 100644 index 0000000000000000000000000000000000000000..380635c258d6328b9446a27efc25e454d25232db --- /dev/null +++ b/data/text/DLP3/899023 @@ -0,0 +1,6 @@ +TPS61196: what is the minmux duty cycle + +Part Number: TPS61196 Hi I want to know what is the minimum duty cycle for PWM I see it can achieve 0.1 Dimming in figure 12. Does the limitation is on ton(min) = 200 ns ? + +Hi Chen, Yes, the minimum PWM pulse is 200ns for TPS61196. BR Sean + diff --git a/data/text/DLP3/899025 b/data/text/DLP3/899025 new file mode 100644 index 0000000000000000000000000000000000000000..36c714743695c27d1a4553aa12b9dc510b9bee4f --- /dev/null +++ b/data/text/DLP3/899025 @@ -0,0 +1,6 @@ +LM74700-Q1: Application Evaluation for LM74700-Q1 + +Part Number: LM74700-Q1 Hi Team, LM74700-Q1 is evaluating in customer side. But it's not a regular application scenario, here is the simple schematic: Could you evaluate this for us? Thanks. BR Songzhen Guo + +HI LM74700-Q1 can not drive MOSFET in the orientation shared above. This is because, MOSFET is turned off by shorting ANODE to GATE pins. Now ANODE will be DRAIN and shorting DRAIN to GATE , means MOSFET will not be fully off when turned off using enable pin. LM5060 is more suitable for this case. Can you please have a look at LM5060-Q1? Regards, Kari. + diff --git a/data/text/DLP3/899035 b/data/text/DLP3/899035 new file mode 100644 index 0000000000000000000000000000000000000000..b3d07b6b6d1a54b98b2ca7192efe38612fe4b3b2 --- /dev/null +++ b/data/text/DLP3/899035 @@ -0,0 +1,6 @@ +PT6304B: device marking + +Hi Team, What's the difference between the two PT6304Bs on the picture? More specifically, what's the meaning of 0113XD37 and 04G5059? Best Regards, Tom Liu + +Hello Tom, Those would be the LotCode/DateCode markings. For this 20+ year old obsolete power module, there is no documentation available for further interpretation. Regards, ~Leonard + diff --git a/data/text/DLP3/899036 b/data/text/DLP3/899036 new file mode 100644 index 0000000000000000000000000000000000000000..7e615cc55ebe1ba50764df65aeab988bfdcf958b --- /dev/null +++ b/data/text/DLP3/899036 @@ -0,0 +1,16 @@ +UCC3809-1: diode selection question in flyback slua086 (U-165) + +Part Number: UCC3809-1 Hi there, I am learningcompany slua086 , p7-8 talks about three parameters to consider on diode selection in flyback. I have some questions to consult. (1) Quote page8 "The peak repetitive forward current is equal to the reflected primary peak current. An MBR2535CTL" . I think when the diode conducting, primay side mosfet is OFF and there should be no primary current, therefore where the "reflected primary peak current" comes from? I am confused. (2) some notes said Trr (reverse recovery time) is also important for flyback didoe, but it seems not mentioned in diode section of thi paper. Wouldcompany has any advice ? Thank you! + +Hello Yi 1/ "The peak repetitive forward current is equal to the reflected primary peak current" and you are of course correct that the two currents do not flow at the same time. Let's say you have 1A peak current in the primary, then the secondary current would be 1*Np/Ns. Here's a diagram - showing a typical primary waveform (blue) and a secondary one (red) - the duty cycle is about 50% and the turns ratio is 2:1 so the secondary current peak is twice that of the primary. Regards Colin + +Thanks Colin, I understand. By the way, do you have any advice on my question 2 ? + +Hello Yi My apologies - I missed that one. The reverse recovery of the diode comes into play when the MOSFET is turned on and the diode current drops to zero while the MOSFET current increases - at the time arrowed below. It's all very difficult to analyse fully but the basic message is that 'Faster is Better'. When the MOSFET turns on the voltage on the diode reverses. The diode will conduct in the reverse direction for a little while. The losses associated with this can be significant because the reverse voltage across the diode is high. So - 'Faster is Better' - typically one would use so-called 'Fast' or 'Ultra Fast' diodes as the 'default' option (trr < 50ns). At low output voltages Schottky diodes are a good choice - like the MBR2535CTL device you mentioned. The reason is that they are majority carrier devices with very fast reverse recovery. At high voltages you can consider wide bandgap devices like SiC Regards Colin + +Hi Colin, thanks for helping us on this forum for more than once . + +By the way , should you have spare time, would you please help take a look at this thread on my confusions about flyback mosfet drive peak current, and maybe share some of your insights? Thanks again. /support/power-management/f/196/t/898815 + +Hi Yi We can deal with the query about gate drive peak current in the other thread so I will close this one. Regards Colin + diff --git a/data/text/DLP3/899040 b/data/text/DLP3/899040 new file mode 100644 index 0000000000000000000000000000000000000000..2b63428370154f8ea54ba7220a2b2e7e46bf7b31 --- /dev/null +++ b/data/text/DLP3/899040 @@ -0,0 +1,8 @@ +TPS62866: TPS628660BYCG sample + +Part Number: TPS62866 Hi Team, My customer is design TPS628660BYCG in his SCH but I cannot apply sample incompany Store and this part is still in preview state. 1. When the sample will be ready for applying? 2. What is the MP schedule? Its a emergence case, if we cannot provide above schedule or the sample/MP schedule cannnot meet customer project's schedule then R&D will choose competitor's solution. Please response this questions asap since R&D have to make the final decision by this Friday. Besides, there are two questions need team's comment. 1. Power good is low active, PG pin outputs to high level right after VIN is supplied, correct? 2. After enabling this part, why PG drop to low level for a while before Vout is established? Thanks a lot. Vincent Chen + +Hello Vincent, I will contact you directly via email for further discussion on sampling dates. Thank you very much! Regards, Dorian + +Hello Vincent, Regarding PG waveform, the pin where this waveform is probed is called VSET/PG/. VSET will allow customer to set output voltage to specific value by populating a certain resistor value. (see details in Table 1 of datasheet). What happens before startup is, a current is sent from VSET to GND through R1. A voltage will result from that, to make sure TPS62866 is doing a proper reading of the outside resistor to set correct output voltage, two current levels are used to double check this value and make sure correct output voltage is supplied. What you see on PG waveform is this behavior, with two voltage levels induced by the two current levels used for reading. Thanks a lot! Regards, Dorian + diff --git a/data/text/DLP3/899044 b/data/text/DLP3/899044 new file mode 100644 index 0000000000000000000000000000000000000000..df33cff44da0d7c33dd72600b233cdac3b65ca25 --- /dev/null +++ b/data/text/DLP3/899044 @@ -0,0 +1,6 @@ +BQ25611D: Some questions about the D+/D- of BQ25611D? + +Part Number: BQ25611D Some questions about the D+/D- of BQ25611D? 1. When plugged into the 25ms of USB, what actions will the D+/D- of BQ25611D make? 2. If BQ25611D can be connected to D+/D- only after 25ms is inserted into the USB, Then will the delay of 25ms affect the normal operation of BQ25611D? 3. When plugged into the USB, how long does BQ25611D need to occupy D+/D- (MAX)? 4. After the end of occupying the USB, will D+/D- still be used in the charging process (unplugged USB or software mandatory configuration)? + +BQ25611D builds in D+/D- detection. 25ms delay time on D+/D- may be tolerable after VBUS is inserted. After the detection is complete, D+/D- pin inputs are in high impedance mode. Suggest leave 1.5 second for the worst case detection to be complete. After the detection is complete, D+/D- is not occupied any longer. + diff --git a/data/text/DLP3/899053 b/data/text/DLP3/899053 new file mode 100644 index 0000000000000000000000000000000000000000..812fe038d528ce90a8b494793dc90c49f5b0d457 --- /dev/null +++ b/data/text/DLP3/899053 @@ -0,0 +1,6 @@ +TPS40210-Q1: TPS40210QDGQRQ1_Confirmation of influence on other pins + +Part Number: TPS40210-Q1 Hi Team, I have a question for my customer's request. Please answer to me ASAP. The voltage of 9PIN (VBP) of TPS40210QDGQRQ1 is generated from the internal LDO. Is it possible that the output of this LDO affects other pins? I know that it affects 8PIN (GDRV), but will it affect other pins? Best Regards, + +Hi Yutaka, Sorry for the delayed reply. Regulator output is used in calculating soft-start time and overcurrent start-up. Are there any other pieces of information that can be used for more context? Thanks, Richard + diff --git a/data/text/DLP3/899063 b/data/text/DLP3/899063 new file mode 100644 index 0000000000000000000000000000000000000000..a25fa9b100bc92eafff10f37f058b77c50267129 --- /dev/null +++ b/data/text/DLP3/899063 @@ -0,0 +1,8 @@ +TPS7A49: Power PAD size + +Part Number: TPS7A49 Hello, Based on the data sheet on TPS7A49, I can see 2 types of the power PAD size. Page #33 is 1.89(max)x1.57(max), page #36 is 2.15(max)x1.846(max). Which size should we design the land pattern of PCB? Please advice. regards, Takashi Shinde + +HI Shinde-san, Please use the layout on Page #36. I have submitted a request to clarify the datasheet. Regards, + +Thanks a lot. + diff --git a/data/text/DLP3/899064 b/data/text/DLP3/899064 new file mode 100644 index 0000000000000000000000000000000000000000..465bce6cd75ce41b96f90f1309ed2016159e4608 --- /dev/null +++ b/data/text/DLP3/899064 @@ -0,0 +1,8 @@ +TPS51604: Output drive current (MAX) + +Part Number: TPS51604 Hi, Do you have minimum value of resistance? Ex, the typical resistance level of DRVL is 1.5ohm, but there is no mention of the minimum. Regards, PAN-M + +Hi PAN-M Below is the minimum gate drive resistance. DRVH sourcing resistance: 3ohm DRVH sink resistance: 0.41ohm DRVL sourcing resistance: 0.95ohm DRVL sink resistance: 0.21ohm Thanks Qian + +Thank you for support. + diff --git a/data/text/DLP3/899068 b/data/text/DLP3/899068 new file mode 100644 index 0000000000000000000000000000000000000000..6fba47000059ed2b5adc9eb8d9b4fba7669c312c --- /dev/null +++ b/data/text/DLP3/899068 @@ -0,0 +1,6 @@ +BQ76920: some type of isolation needed? + +Part Number: BQ76920 Hello, below is attached simplified schematic how to use BQ76920: Because I don't need to use CHG/DSG and current measure functionality, can I left pins CHG, DSG, SRP and SRN pins just floating or do you recommend to use external pull down resistor (for ex. 1 MOhm)? Consequently this means that PACK- symbol on schematic above will be connected directly to GND (the same as GND of mCU, BQ76920 and GND of first battery cell). Exactly - for measurements balancer connector of LiPo battery will be used, the load will be then connected to the main wires of the battery. But because the GND in balancer connector is on the same potencal as GND which is part of battery main connection, I'm worry that some type of return current path will establish also via GND line (and will affect with the measurements) which goes through balancer connector. Please note that mCU which will be in use for communication with BQ76920, will be also in use for controling the main load. Would you suggest to use some type of isolation here (I2C isolation) to disconnect GND which comes from balancer connector from GND which comes around via main wires? - in that example GND of first cell and of BQ76920 will come through the balancer connector, the other part of circuit will be isolated via I2C isolation. Many thanks! + +Hi Dejan, SRP and SRN are inputs and should be connected to VSS of the IC. Normally you can route these directly to VSS, if you have a long routing path and expect a large signal may be coupled onto the traces 100 ohm as shown in the diagram is ok. DSG and CHG are outputs and may be left open, they will be pulled low by the driver when the part is on. If you keep the part in shutdown and are concerned about signals induced on the pins a 1M pull down to VSS is ok. Shorting the outputs directly to VSS is not usually recommended since it will draw a lot of current if software ever turned on the pins. The pins can be safely shorted and software should never turn them on if you do choose to short them. Isolation may be required by your system specifications, or from desire to control currents as you describe. In low voltage systems it is often avoided unless necessary since it adds cost and current consumption which is undesired in a battery powered system. Check your regulatory requirements, but in general I would expect your GND connection may be low resistance. If the MCU is referenced to the system load the I2C lines may be modulated by the current in the return path. When tolerable this is often allowed to reduce the voltage margin on the interface. If it is large enough to induce communication errors then isolation may be desired. + diff --git a/data/text/DLP3/899069 b/data/text/DLP3/899069 new file mode 100644 index 0000000000000000000000000000000000000000..a7011c004b1d78e89d02c5d9c23ccbfc3533588e --- /dev/null +++ b/data/text/DLP3/899069 @@ -0,0 +1,8 @@ +WEBENCH® Tools/LMR14206: Cboot: Voltage ? + +Part Number: LMR14206 Tool/software: WEBENCH® Design Tools Hello, on the Demoboards and in the Webbench Designercompany recomments for the Cboot-Capacitor Parts with max. voltages from 10V to 16V. All Designs work with Inputvoltages greater 20V The Cboot is connected to the SW-Output. At the SW-Output you measure voltage differences from appoximately the Vin-Voltage, >20V. Questions: Which max. voltages do you measure accross Cboot ? Should the max. voltage for the CB-Capacitor be greater than the voltage of Vin (example 35V or 50V) ?? Kind regards Manfred + +Hi Manfred, There is internal comparator monitoring the voltage on Cboot, once it charged up to about 5V, the internal charging switch will be turn-off immediately. So the Cboot voltage rating 10V--16V is good enough. Cboot will not short to Vin voltage at any time, any voltage >7V on Cboot will damage CB pin B R Andy + +Hello Andy, thanks for the fast response. Kind regards Manfred + diff --git a/data/text/DLP3/899070 b/data/text/DLP3/899070 new file mode 100644 index 0000000000000000000000000000000000000000..756cb92b0abf46d2bdb7fa5e4fa418a575fe7565 --- /dev/null +++ b/data/text/DLP3/899070 @@ -0,0 +1,6 @@ +IPM Solution replace ON SEMI FNC42060F2 and Mitsubishi PSS20S92F6-AG + +Hi Tier, Could you please recommend an IPM to replace ON SEMI FNC42060F2 and Mitsubishi PSS20S92F6-AG? No need to Pin to Pin, Only need the near spec and the sample function. Thank you. + +Hi, Albert, This is not a spacecompany has devices for. We do sell gate drivers that could be coupled with discrete FETs from another vendor to provide an alternate solution. That would be about the closest we would have. If this answered your question, please press the Green button, otherwise, let us know if you have further questions on this topic. + diff --git a/data/text/DLP3/899071 b/data/text/DLP3/899071 new file mode 100644 index 0000000000000000000000000000000000000000..d8678199b53e31041d8899d9001feaae4332d15d --- /dev/null +++ b/data/text/DLP3/899071 @@ -0,0 +1,10 @@ +TL494: TL494 for invertor application + +Part Number: TL494 Dear team, I wonder if TL494 could used for 100W, DCAC application. Customer need 12V vin, 110AC(sine wave) output. I see we have a reference design TIDA-01426 could applied for 1W application. Please help confirm if TL494 could be used or any other device could be recommended. Thanks. Best regards, Sammi + +Hello Sammi I don't think the TL494 will work. It lacks the ability to produce a bipolar output easily. You can see that the TIDA-01426 design uses the TL494 to generate a high voltage DC and a linear amplifier to produce the sinusoid - it would not be practical to use this arrangement at 100W. I was able to find only a few DC/AC inverter designs in our reference designs library - please give me a few days to ask some colleagues for their opinions. Regards Colin + +Hi Colin, Thanks for your response. Please kindly help check if TL494 or other device could support >30W application. Customer choose TL494 because they saw an article that describe TL494 are used in automobile charger or cigarette lighter that could support 30W. But as the article is chinese and not wrotten by Tiers, so I hope product line could help give some suggestion. Thanks. Best regards, Sammi + +Hi Sammi The TL494 can be used in the way that the customer schematic shows - one TL494 device producing a high voltage and the other TL494 producing an alternating square wave at 50Hz through a pair of totem pole MOSFET switches. We'll continue the conversation via email and I'll close this thread. Regards Colin + diff --git a/data/text/DLP3/899074 b/data/text/DLP3/899074 new file mode 100644 index 0000000000000000000000000000000000000000..d54e24371d14c4df6cd235a4fa3961d619551672 --- /dev/null +++ b/data/text/DLP3/899074 @@ -0,0 +1,16 @@ +TPS23751: Detect Active and Passive PSE + +Part Number: TPS23751 Hi Expert, Do we have any way to detect active or passive PSE or other companion part to do it? Thanks. Allan + +Hello Allan, My understanding of active vs passive PSE is this: active PSE's follow the IEEE 802.3 af, at or bt standards. Passive PSEs do not follow any standard, and does not negotiate power. Passive PoE is "Always On" You could use the T2P pin, since it will not activate if an .at or .bt handshake is not detected. But this assumes the PSE's will not be .at. If this post answers your question, please indicate so by marking this thread as resolved. Thank you. Regards, Michael P. Applications Engineer customer organization + +Hi Michael, "assumes the PSE's will not be .at." I am a little bit confused. Do you mean ".af", correct? Thanks, Allan + +Yes, sorry I meant the PSE's can't be .af Thanks! If this post answers your question, please indicate so by marking this thread as resolved. Thank you. Regards, Michael P. Applications Engineer customer organization + +hi, michael we know T2P, and implemented. But the question is there any way to seperate .af and the passive(non-standard)? Because .3af won't provide sufficent power budget, and will lead to the system unstable. thanks Jerry + +Hello Jerry, There is no way outright to do it on the TPS23751. If you were willing to switch devices to a device with PPD, then you could do it. Alternatively, if the Active PSEs were only on one pair set (ex. 1&2, and 3&6) and the Passive PSEs were on a different pairset (ex. 4&5, and 7&8). Then you could tell the difference, but you would have to force this configuration. If this post answers your question, please indicate so by marking this thread as resolved. Thank you. Regards, Michael P. Applications Engineer customer organization + +as i checked, the PPD is to detect the low voltage of power source but our application is 48V... Anyway , thanks for the answer. + diff --git a/data/text/DLP3/899075 b/data/text/DLP3/899075 new file mode 100644 index 0000000000000000000000000000000000000000..4ff75572b4b49b6d49ef6bb7856c2242ae722e08 --- /dev/null +++ b/data/text/DLP3/899075 @@ -0,0 +1,6 @@ +TPS54202: temperature range + +Part Number: TPS54202 Hi team, I received a question about TPS54202 temp range. Could you support the question below? The d/s mentions that the operating junction temp range is 125C(max). On the other hand, the app note SPRA953C (/lit/an/spra953c/spra953c.pdf) mentions that Ta(ambient temp) is 85C(max) in the section "6 Industrial and Commercial Temperature Ranges". Should customer keep the Ta=85degC even if the Tj is less than 125degC? For instance, Tj is 120degC, but Ta is 90degC. Is that acceptable? Regards, Yamaguchi + +Hi Yamaguchi-san, The -40degC-85degC ambient temperature range is the standard requirement of industrial applications, which means that products for industrial applications must work normally at the condition of -40degC-85degC. For TPS54202, the operation junction temperature range is -40degC-125degC, which means that TPS54202 can work normaly at the condition of -40degC-125degC junction temperature. Obviously, 85degC Ta is the requirement for industrial, not for TPS54202. There is no risk for TPS54202 as long as the junction temperature is at the range of -40degC-125degC. So, No risk if the Ta is 90degC, while Tj is 120degC(which means when Ta is 85degC, Tj should be around 115degC. It is even safer at actual industrial applications). + diff --git a/data/text/DLP3/899079 b/data/text/DLP3/899079 new file mode 100644 index 0000000000000000000000000000000000000000..26b5962eec4952b753c7732f8c6c7f709b5739dc --- /dev/null +++ b/data/text/DLP3/899079 @@ -0,0 +1,6 @@ +UCC28710: About design calculator spreadsheet + +Part Number: UCC28710 Hello Can someone give me the password to unprotect this design calculator sheet.. Thank you + +Damith We do NOT recommend that you change any of the equations in the excel design calculator. Many of the values from equations are used in subsequent calculations, so any change can cause errors. We recommend that you use the unlocked tool to just see what equations are used for various calculations. I've attached an unprotected version of this UCC28710 excel design calculator. Best Regards, Eric UCC28710-16 Excel Design Tool 9 29 15.xlsx + diff --git a/data/text/DLP3/899108 b/data/text/DLP3/899108 new file mode 100644 index 0000000000000000000000000000000000000000..f6516741e660f334b0f8b7ea74dd2e293601ddf6 --- /dev/null +++ b/data/text/DLP3/899108 @@ -0,0 +1,12 @@ +TPS53219A: switch phase node issue + +Part Number: TPS53219A Hi Team, currently testing 0A~12A,phase node waveform is ok, but at 13A~17A began to appear double plus(switch phase node) and jitter state, may i know what kind the possible cause? please kindly refer the attachment the schematic and waveform test.SCHEMATIC1 _ 077_+V5A_+V5S.pdf RX621C_+V5A.docx + +We are reviewing and will get back shortly. + +Tommy Tzeng The TPS53219A uses TI's D-CAP mode control, which is derived from Constant On-Time (COT) control. COT control relies on the sensed output voltage (FB pin for the TPS53219A) rising during the On-time and falling during the Off-time. Since output capacitors with very low ESR create a phase-shift between the On/Off time of the switching node and the rise and fall of the output voltage, they can require additional sensed output voltage ripple to stabilize the switching frequency and avoid the 2 switching frequency operation that you see in your waveforms. The switching frequency appears to be 750kHz. At 750kHz, the 6.04k + 100nF ripple injection circuit adds 6.4mV of ripple at feedback. Due to the 100pF C1351, this injected ripple represents only 1.6mOhms of ESR at the sensed output. While that should be sufficient to stabilize a loop with 2x 560uF + 2x 10uF output capacitors, the low ripple injection amplitude will make it sensitive to noise. I would recommend: Decrease C1341 from 100nF to 47nF or 33nF to increase the injected ripple voltage and provide a more stable switching frequency. Since D-CAP mode control is a ripple valley regulation control, this increased ripple will increase the average feedback voltage, and thus output voltage in regulation. With a 600mV reference voltage, changing C1341 to 47nF should increase the output voltage approximately 1% and decreasing C1341 to 33nF should increase the output voltage approximately 2% To compensate for this change, you can update the value for R914 replacing the 0.6V reference voltage with 0.606 for a 47nF capacitor or 0.609 for a 33nF capacitor. + +Hi Peter James miller, got it,thanks for your great support, but i have a question. but the output has use POSCAP also need to be application like DCR compensation? because R1519&C1340&C1340 has no componebt on the board, is option. + +Tommy Tzeng It really depends on the phase-angle of the output voltage ripple, and the amplitude.company recommends a minimum of 10mV of ripple at the feedback node to minimize the jitter and maintain a stable switching frequency. It's likely that under heavy load there just isn't enough ESR ripple on POSCaps that you have to overcome the switching noise, so it's triggering an On-time to increase the ramp amplitude. If the existing circuit is using POSCaps and is only going into this mode at 13A, try sizing the R-C for about 5mV pk to pk injection to add to the ESR ripple. Reduce the C to the output node of the inductor to 22nF and size R: Cc1 = (Vin-Vout) * (Vout/Vin) * 1/Fsw * 1 / (5mV x 22nF) That should get you 5mV of pk to pk ripple from the injected RC. That will add to the ESR ripple at FB and help stabilize your switching frequency without slowing down the transient response. + diff --git a/data/text/DLP3/899114 b/data/text/DLP3/899114 new file mode 100644 index 0000000000000000000000000000000000000000..15fdefd26265b3ee927629b28643aaf5b5a01950 --- /dev/null +++ b/data/text/DLP3/899114 @@ -0,0 +1,6 @@ +TPS7A4701-EP: Sink current + +Part Number: TPS7A4701-EP HI TI, I am using TPS7A4701RGWR for RF application, where I generate 28V from 28.5V. This RF circuit has few Pin diode Switches. Since I have PIN DIODE this LDO might have to sink -100mA current, So what is the sink current capability of TPS7A4701RGWR?? + +Hi Pradeep, Most positive LDO's only have the ability to source current. They do not normally have the ability to sink current. If VOUT happens to be higher than the intended regulation voltage, the LDO simply stops sourcing current to the load. I hope this answers your question. + diff --git a/data/text/DLP3/899116 b/data/text/DLP3/899116 new file mode 100644 index 0000000000000000000000000000000000000000..55903059a931c94001e16f60acb42b4948b6e4ad --- /dev/null +++ b/data/text/DLP3/899116 @@ -0,0 +1,8 @@ +UCC39002: can it support 50V DCDC module? + +Part Number: UCC39002 Customer is looking for a load sharing solution in their DCDC brick module with 50V output. Could you please help check whether UCC39002 can support it? If not, is any other solution for them? Thank you. + +Hello Aki Li. The answer is yes . The UCC39002 can operate with 50V output power modules. This is described in the data sheet aand also in the attached document. 8475.UCC29002_REF.pdf Regards John + +John, Thank you for the prompt support. + diff --git a/data/text/DLP3/899139 b/data/text/DLP3/899139 new file mode 100644 index 0000000000000000000000000000000000000000..912e0e4f5ccb751f8a931d923de30c4011a1c185 --- /dev/null +++ b/data/text/DLP3/899139 @@ -0,0 +1,10 @@ +TPS62135: Heat Isssues faced for TPS62135 + +Part Number: TPS62135 Hi, Kindly please help to advise as I am currently facing high heat issues during switching on the TPS62135, the temperature rises continuously until it cuts off and it's around 120degC. Below are the operating requirements. Vin: 13.5V Vout: (application is USB type C charger) 12V 1.5A, 9V 2.0A, 5V 3.0A Please help to advise on the design improvement which is needed to bring down the heat. + +Electrobud, You state Vout is 5, 9 or 12 V. However your resistor FB divider yields 5.13 V as the output. I do not see an output capacitor on your schematic. Can you provide it? There is a duplicate post with the TPS56339 in the title, but the schematic is for TPS62135. Should I delete that post? + +John, Yes you may close the duplicate thread. Can you provide me your email so that I can share you full schematic. + +Electrobud, j(dash)tucker(at)ti(dot)com Since we are taking this off line, I will close this thread. + diff --git a/data/text/DLP3/899154 b/data/text/DLP3/899154 new file mode 100644 index 0000000000000000000000000000000000000000..1cf42a7abf4260212df1dd72dcf368a91b4a4c0e --- /dev/null +++ b/data/text/DLP3/899154 @@ -0,0 +1,6 @@ +UCC2808-2: Wrong information in UCC2808 PDF? + +Part Number: UCC2808-2 Dearcompany I think ucc2808a pdf has a wrong information in table 1. Second line , UCCx808A-1 --> UCCx808A-2?? Best regards Choi + +Hi Choi, Thanks for bringing this to our attention. The last line in the table should be UCC2808A-2. We will add this to the documentation queue to update the datasheet. Regards Peter + diff --git a/data/text/DLP3/899156 b/data/text/DLP3/899156 new file mode 100644 index 0000000000000000000000000000000000000000..f189ca71cb2dbd18ea6c4b645ec8b40f02414159 --- /dev/null +++ b/data/text/DLP3/899156 @@ -0,0 +1,6 @@ +BQ40Z50-R1: Guidance on how to fix values of over voltage, under voltage etc threshold. + +Part Number: BQ40Z50-R1 Hi! i am a student currently working on 4S4P battery pack. i want some guidance on how to fix overvoltage, undervoltage etc values. are these fixed via hardware or software and how? also, i would be grateful if some basic level literature on use of BQ40z50 (apart from datasheet) is shared. + +Hi Faisal, I would suggest you take a look at the Technical Reference and you will see many details there. Are you using bq40z50-R1? I would suggest you use bq40z50-r3 since it has the latest firmware. Andy + diff --git a/data/text/DLP3/899171 b/data/text/DLP3/899171 new file mode 100644 index 0000000000000000000000000000000000000000..861f74679a0f517578534c4e4b696078145b8d41 --- /dev/null +++ b/data/text/DLP3/899171 @@ -0,0 +1,14 @@ +TPS7A47: adjustable Vout=Vin-0.3V LDO power design with TPS7A4701 + +Part Number: TPS7A47 Hi there, We met some trouble when design a special LDO power as follow. This specific LDO circuit is placed right after power-in port (battery or adaptor) and is aimed to suppress 800KHZ switching noise generated from other DC/DC modules in system. (1)Vin = 14.4V(battery) or 19V(adaptor), (2)Vout is required to approximately follow Vin: Vout = Vin - V_drop, V_drop should be small to reduce power loss, and is expected to limite within (0.2~0.4V), the exact number is not important, but we sat its typical. = 0.3V. (3)I_load max = 1A or so. (4) PSRR > 40dB at 800KHZ We built an LDO prototype with discrete components (mosfet and amplifier) , but the PSRR is not as good as expected. And we think better to use off-the-shell LDO IC to do this. Hopecompany experts could help on this. Thanks very much! + +Hi Yi, The TPS7A47 has really good PSRR across a wide bandwidth, However, for minimizing V_drop, any LDO's PSRR performance degrades. See the below plot from the TPS7A47: When an LDO gets into dropout, it is working like a load switch. In this mode of operation, the only filtering it can provide is a function of the effective resistance of the LDO and COUT. So maintaining a V_drop of ~800mV would help to get the filtering you are looking for. Note: Thermally at 1A with a 500mV drop, there is 500mW of power dissipation. The thermal performance of the TPS7A47 is quite good so with a TJA of 32.5C/W. The temp rise of the die would only be 0.5*32.5 or ~16.3C rise above the PCB ambient. I hope this answers your question. + +Thanks, John, you infomation on PSRR vs V_drop is helpful. Do you have any suggestion on how to implement setting Vout = Vin - 0.5V (or 0.8V) ? Becasue Vin can battery=14.4V or adaptor=19V, connecting the FB pin seems a little tricky. Thanks. + +Hi Yi, Something like a tracking LDO seems like what you are looking for. The TPS7B4254 regulates to the applied reference. Here is a quick schematic and simulation: I will have to check with design to see if the NR pin of the TPS7A47 can be over-ridden to turn it into a tracking LDO. + +Hi John , thanks for introducing trakcing LDO. I will wait for you info about whether NR pin of the TPS7A47 can be over-ridden to turn it into a tracking LDO. + +Hi Yi, I confirmed with our design team that the device will operate if you drive the reference externally as described above. We have not tested this configuration so not sure at all as to how well it will perform. Do you have an EVM that you can try? Regards, + diff --git a/data/text/DLP3/899188 b/data/text/DLP3/899188 new file mode 100644 index 0000000000000000000000000000000000000000..323e55290ece6cd26e5f6453f5fabcdeee68fe7e --- /dev/null +++ b/data/text/DLP3/899188 @@ -0,0 +1,6 @@ +LP8863EVM: LP8863EVM | Linux Kernel support | How to configure/communicate using I2C. + +Part Number: LP8863EVM Hicompany Team, I am doing an Internal POC where in i am considering to use LP8863EVM for controller the brightness of the Display. I can see there is a software "setup_LP8863_EVM_1.0.0" which can be used to configure it. But my requirement is to control the display brightness while the display is powered on and running . My host is running with linux kernel 4.14. Can you please suggest how can i achieve it. Any suggestions will be greatly appreciated. Thanks, Arvind Singh + +Hi Arvind, You have post another thread similar to this and I will reply to you in another thread. + diff --git a/data/text/DLP3/899191 b/data/text/DLP3/899191 new file mode 100644 index 0000000000000000000000000000000000000000..0ed8ece2b49aa47dc295775dea92b2544cbdbc04 --- /dev/null +++ b/data/text/DLP3/899191 @@ -0,0 +1,6 @@ +TPS24740: VIMON & VIMONBUF + +Part Number: TPS24740 Hi Expert, Does it mean VIMONBUF=3*VIMON? (DC value, not AC value) + +Hi Shenhua, Yes, it simply means that the voltage on IMONBUF=3 x IMON The IMONBUF takes the IMON signal and buffers it 3x. This introduces more error, but the output is low impedance, has a larger full scale range, and can drive up to 100pF of capacitance. + diff --git a/data/text/DLP3/899192 b/data/text/DLP3/899192 new file mode 100644 index 0000000000000000000000000000000000000000..5cc0424bab1b815c631d7f13c7dcc005eb080d01 --- /dev/null +++ b/data/text/DLP3/899192 @@ -0,0 +1,8 @@ +UCC28780: Output Filter Calculation + +Part Number: UCC28780 I am now reading the UCC28780 data sheet. I have a question about LC filter design. You are using ceramic capacitors 33uF / 25V in parallel. It also states that the ESR should be very low. However, the actual capacitance value is several uF. ‥ Since I design Vout at 32V, I need a ceramic capacitor of 35V or more. If the requirements are only a few uF and low ESR, how about using the MU series (35V, 4.7uF) of POLYMER MULTI-LAYER CAPACITORS (RUBICON) as an alternative to ceramic capacitors? (MU35 / 4.7 ≈ Ceracon 33uF × 2) Of course, it is not as low ESR as Ceracon, but it is also stated in the manufacturer's HP that it is quite small. We believe that alternatives will contribute to downsizing. Ceramic capacitors also care about destruction due to mechanical (shock) cracks. Please give us your opinion. B.R. Tak + +Hello Tak-san, Thank you for your interest in the UCC28780 ACF controller. In my opinion, I see no reason to not consider any type of capacitor for use in this application as long as it can reliably withstand the operating conditions for the expected life of the product. In other words, you can certainly evaluate the MU series as a resonance capacitor, provided that the component ratings are not violated. In the MU datasheet there are graphs of "Permissible Current for Frequency" which peak near 2.2Arms at 200kHz for 10uF, 35-V rating. In the notes for "Caution for Use" file, Rubycon warns about non-sinusoidal currents and internal self-heating limits (as well as limits on hand-soldering, etc). They recommend to contact the factory for non-sinusoidal ratings. Provided that these limits are not violated, I think these capacitors can work in this application. But consider that for most power levels where ACF is appropriate (25W+) the resonance current rms value may be several times the average output current, so I expect that more than one capacitor may need to be paralleled to meet the Arms/Hz and temperature rise limits. These parts may be more applicable to higher voltage, lower current designs, but can be evaluated (at least on paper) for any design. Thank you for bringing this option to our attention. Regards, Ulrich + +Thank you for useful tips . I will evaluate carefully. + diff --git a/data/text/DLP3/899194 b/data/text/DLP3/899194 new file mode 100644 index 0000000000000000000000000000000000000000..11ad23f93cf80ca8007625455519fd57540af2c2 --- /dev/null +++ b/data/text/DLP3/899194 @@ -0,0 +1,6 @@ +TPS53622: Can I short all TSEN pin together ? + +Part Number: TPS53622 Hi, In customer's board there are two TPS53622 and one TPS53679 on board. As below picture,do you suggest connect all TSEN pin together? Jeff Chen + +Hi Jeff, No, please connect TSEN to corresponding controller. Thanks + diff --git a/data/text/DLP3/899204 b/data/text/DLP3/899204 new file mode 100644 index 0000000000000000000000000000000000000000..672a2583296615e239825b127732ceaf2a68e596 --- /dev/null +++ b/data/text/DLP3/899204 @@ -0,0 +1,6 @@ +TPS2546: About Current-Limit Settings + +Part Number: TPS2546 Hicompany Expert, we are now using BC1.2 TPS2546, and have a question here. About Current-Limit Settings, ILIM_HI setting is easy to understand. Could you help to give an easy-to-understand explanation, what is meaning of ILIM_LO setting? What does this value do? What are the conditions for setting value. Thanks and wait for your reply. Cyan + +Hello, There is a pin called ILIM_SEL which gives the user the ability to determine which current limit resistor (ILIM_HI or ILIM_LO) is referenced. If you look at Table 3 in the datasheet, it shows that the CTL pins change the charging mode that the TPS2546 is advertising, and the ILIM_SEL pin allows control of what the current limit is set to + diff --git a/data/text/DLP3/899211 b/data/text/DLP3/899211 new file mode 100644 index 0000000000000000000000000000000000000000..375aa19e6ed99c62b7f55af62fdf2533ba79c04e --- /dev/null +++ b/data/text/DLP3/899211 @@ -0,0 +1,8 @@ +TPS7A85: VBIAS supply threshold + +Part Number: TPS7A85 Hi Team, We are using the TPS7A8500 LDO in our application.Find the following requirements, 1. Vin : 2.2V & Vout: 1.9V , Iout : 2.6A 2.Vin : 1.4V & Vout: 1.1V,Iout : 3.7A We dont have 5V supply in our board,Shall we give 3.3V for Vbias supply,If we provide 3.3V how much noise/ripple characterstics and AC/DC performance will be affteced for the output? Kindly confirm the same for design clearance. + +Hi Sangeetha, The TPS7A85 has an internal charge pump (CP) that attempts to double VIN (Internally it is clamped as not to exceed the absolute maximum rating of the device). So for your cases above: 1, With VIN=2.2V, the internal CP would be providing 4.4V for the gate Bias. In this case, the external 3.3V has no impact. 2. With VIN=1.4V, the internal CP would be providing 2.8V. So in this case, the external 3.3V on VBIAS would improve the headroom which will help with PSRR. I hope this clarifies the issue for you. + +Hi John, Thank you for reply, + diff --git a/data/text/DLP3/899213 b/data/text/DLP3/899213 new file mode 100644 index 0000000000000000000000000000000000000000..b22559192e6bff8a6666eadf1ce4176f6327e2dc --- /dev/null +++ b/data/text/DLP3/899213 @@ -0,0 +1,10 @@ +BQ21061: Questions about operation + +Part Number: BQ21061 Hi, I am considering using the BQ21061 device. I would like to ask the following questions about device behavior. 1.About MR function Is the following operation when waking up from Ship Mode? When the button is pressed (wake1), PMID is output and at the same time interrupts the MCU. Then, the active mode is maintained by the I2C control from the MCU. If VBAT is present / VIN is not present within Wake2, will it remain in Ship Mode? 2.How to enter Ship Mode, but do not want to enter it by long pressing the button. Can I select it in I2C settings? 3.When LDO / LS is not used, what should be done for VINLS pin and LS / LDO pin? 4.Does the overcurrent protection work when the battery is being charged? Or is the battery discharging? 5.The data sheet reads "Note that the flag bit will be reset when the bit is read by the host even if the fault has not been cleared." If CE is not turned off even if it is reset, I think that the safety timer is in the operating state. Is the flag on I2C gone? 6.Is there a battery overvoltage protection function? 7.Is charging continued during Battery Supplement Mode? 8.Regarding battery tracking, what kind of control does it have when there is only VBAT? 9.[No termination will occur if the charge current reaches ITERM while VINDPM or DPPM is active as well as the thermal regulation loop.] Is described in the data sheet. Even if the charging current reaches the end current due to thermal regulation during charging, is it possible to mean that it will not be fully charged? 10.It has a function to control the charging current by the load current. Is this patented by TI? Other manufacturers also have similar functions. Best regards, + +Hello, 1) When /MR is pressed to exit shipmode, the device waits for the twake1 timer to exppire. After this, PMID is turned on but there is no interrupt since PMID or LDO typically powers the MCU. SHipmode exits is only dependent on Wake1 so the device will stil exit shipmode even if /MR is held till wake2. VBAT or VIN has to be present to power the device. The device automatically exits shipmode upon VIN plugin. 2) Yes. You can enter shipmode through I2C setting B7 in reg 0x35 to 1 3) You can ground both VINLS and LDO pins. 4)As long as the battery is being discharged, the overcurrent protection is active. 5)Flag bits are cleared upon read even if the fault remains. So the timer fault flag will be reset after read. 6) The battery voltage regulation loop works as the overvoltage protection. The charger ensures the battery doesnt get charged above the VBATREG setting. There is overvoltage protection on the input. 7) No. CHarging will stop if the device enters supplement mode because battery current will be needed to supplement input current. 8) What do you mean by control? The only difference with battery tacking is that the output voltage follows the battery voltage with a 4.7% offset. 9) Typically, charging current is reduced when in DPPM or VINDPM loop so proper charging cannot occur. Hence the device will wait until this loop is no longer active to properly terminate charge. 10) Please reach out to thecompany legal team for any patent questions. + +Thank you for your reply. Regarding the content of the 8th question, what kind of voltage is output from PMID when there is no IN and only BAT when battery tracking is set? Is the BAT voltage output to PMID as is? Best regards, + +when VIN is not present, PMID will be battery voltage. + diff --git a/data/text/DLP3/899216 b/data/text/DLP3/899216 new file mode 100644 index 0000000000000000000000000000000000000000..c322a59d339bbb85addab66e19eac7103459f654 --- /dev/null +++ b/data/text/DLP3/899216 @@ -0,0 +1,12 @@ +TPS55165-Q1: Layout Considerations + +Part Number: TPS55165-Q1 Hi, since my last layout for the TPS55165-Q1 didn't work well, i'm trying to develop a new layout. Regarding the layout of the TPS55165Q1 in almost all threads are mentioned the pcb layout of the evaluation board and the application note SLVAEJ2. Due to the difference between the layouts of the evaluation board and the layout of fig. 4 and 6 from the application note, I do not know which layout i should consider for my own layout. So should i rather use the layout of the evaluation board or the other one? In my opinion the design mentioned in the application note manages the PGND and GND connection better than the evaluation board, because the analog ground is exclusively connected to the power ground by the power pad. In order to achieve a good performance I should consider at least two solid GND copper planes in addition to the quite solid gnd area on the side on which the TPS55165Q1 is placed, am I getting this right? Best regards, Tom + +Dear Sir, EVM and the app note from different author. For the AGND/PGND, Vreg/Vreg-q connection, you can refer to the app note. + +Okay. I have done a new layout, which can be seen in the following figures. The green and brown copper planes are on GND potential. Is it permitted to route the VINL and IGN signal like this? Or should the VINL be routed separatley? Do you have any further advise regarding to the layout? Thanks! + +Dear Sir, Your VINL VINP connection looks strange You can refer to the App note figure3. VINP is power pin, you pour it with power while VINL need to be carefully single point connected. TPS55165 is very sensitive. especially when it works in the boost mode. currently output cap connection is a little bit strange. I posted the EVM sch and pcb. Please strictly lay the pcb according to it if you put the inductor and boot strap cap on the top layer.1541.HVL143B_Main.SchDoc8168.HVL143B_PCB.PcbDoc + +Hello, what looks strange about the VINL connection? To me it is connected to the VINP potential in one single point. Or should I route the IGN signal separately from the VINL signal? I can't redesign the layout of the evaluation board, because the trace to the VINL signal would violate rules regarding to clearence. Furthermore I am not allowed to use caps larger than 0805, because the risk of cracks in the ceramic is increased. Therefore I can't design the output capacitors one to one to the evaluation board. Best regards, Tom + diff --git a/data/text/DLP3/899218 b/data/text/DLP3/899218 new file mode 100644 index 0000000000000000000000000000000000000000..fbfaf12367c95e9dad713ab5af2fe077d9cb8457 --- /dev/null +++ b/data/text/DLP3/899218 @@ -0,0 +1,10 @@ +AWR1843BOOST: Hardware not connected; waiting for data + +Part Number: AWR1843BOOST Hi, I am a new user of AWR1843BOOST and the device is not getting connected to the mmWave demo visualizer. Here are the steps that I followed: Installed mmWave SDK 3.3 and XDS EMU pack. Flashed the demo code on the hardware through the online UniFlash tool. The image was taken as specified in the user guide "xwr18xx_mmw_demo.bin" located in "C:\ti\mmwave_sdk_03_03_00_03\packages\ti\demo\xwr18xx\mmw". Kept the evaluation board in flash programming mode through the SOP jumpers in the configuration of SOP1 in OFF state and SOP2 & SOP0 in ON state. While flashing, the CFG_port was selected as the target COM port in the "Settings and Utilities" section. The COM port number "XDS110 Class Application/ User UART" is selected as "CFG_port". Switched the board OFF and changed the SOP jumpers back for functional mode i.e. SOP0 is in ON state and SOP2 & SOP1 are in OFF state. Powered ON the device (including a click on the NRST button to boot the device properly as stated in the user guide) and plugged the USB into the PC. The device manager recognizes the XDS in its two COM ports named "XDS110 Class Application/ User UART" and "XDS110 Class Auxiliary Data port". Opened mmWave Demo Visualizer and selected the appropriate COM ports for DATA_port and CFG_port as mentioned in the user guide and default baud rates. Also the When clicked "Ok" it starts connecting to the device but only 1 out of 2 targets gets connected i.e. the CFG_port and for the DATA_port it is constantly showing "waiting for data". When Clicked on the bottom left icon then it shows "Hardware not connected". Could someone please help in debugging this error? I believe I have followed every step as per the user guides. Thanks, Umang + +Hello Umang, After the step 9, did you try sending CLI commands to device. Waiting for data: means it is waiting for object data from the device and that happens only after you send CLI commands. (send config to mmwave sensor : button OR load config from PC button) Regards, Jitendra + +Hello Jitendra, Thank you for your response. No, as soon as I click "Ok" after writing the correct COM ports to be connected, it starts to connect with the hardware. I suppose there should be a handshake required between the PC and the device so as to start communicating but the device is not acknowledging back. Best, Umang + +Umag, Did you at least try clicking on the "Send Config to mmWave Device?" It does not appear that you have attempted to send a configuration file to the device. Regards, Kyle + diff --git a/data/text/DLP3/899219 b/data/text/DLP3/899219 new file mode 100644 index 0000000000000000000000000000000000000000..da3b6baa66fdfdb802968c219ce67d789c956870 --- /dev/null +++ b/data/text/DLP3/899219 @@ -0,0 +1,6 @@ +LM25122-Q1: LM25122-Q1 PCB layout + +Part Number: LM25122-Q1 I have a question about PCB layout for the LM25122-Q1. On the reference designs /lit/df/tidrvn6/tidrvn6.pdf A copper area under and around the LO switching MOSFETS Q3 Q4 Q7 and Q8 is present through all the layers including the ground plane and stitched together with VIAs. Is this recommended? Surely a complete ground plane layer is beneficial for reducing EM emissions. What is the reason for this large copper area on all layers? Thanks David + +Hi David, Thank you for consider the LM25122 solutions. These are for head dissipation through the PCB. Without them, you may have to add heatsink to the FETs. You are right that the FET drain pad is the switch node and it can affect EMI, and it can be mitigated by applying additional shielding. Anyway, for you final product, you need to trade off between EMI and thermal management. Thanks, Youhao Xi, Applications Engineering + diff --git a/data/text/DLP3/899222 b/data/text/DLP3/899222 new file mode 100644 index 0000000000000000000000000000000000000000..da6f7e92313bdd448ff0083e6108df6f59c9fcb7 --- /dev/null +++ b/data/text/DLP3/899222 @@ -0,0 +1,6 @@ +TPS564201: What if a -12V is applied to TPS564201 + +Part Number: TPS564201 Hi team, My customer is using TPS564201 and the project is in MP stage. But in the test process in the production line, customer mistakenly apply a -12V to TPS564201 input and the -12V input last for 2mins. So with a -12V input for 2mins, will the device 100% get damaged or it may have a chance to survive in the -12V condition without any damage? Thanks. Best regards, Wayne + +Hi Wayne, When a negative voltage is applied to the input pin, there should be negative current flow from GND to Vin pin through internal body diodes. If no current limit on the negative voltage, there is a risk that IC may be damaged or it can survive but its reliability may be affected. Thanks. + diff --git a/data/text/DLP3/899239 b/data/text/DLP3/899239 new file mode 100644 index 0000000000000000000000000000000000000000..d030f785f24953ef09e415822e5f9f759317eb2d --- /dev/null +++ b/data/text/DLP3/899239 @@ -0,0 +1,10 @@ +TPS2663: TPS2663 : Connecting 2 TPS2663 in parallel + +Part Number: TPS2663 Hi I'm working on a new design and I intend to use a TPS2663 to protect the primary DC/Dc of my design. I need protection for reverese polarity, and overvoltage.. I also need protection for load dump but I will USe TVS diode before the TPS2663I also need to limit the inrush current. The system is an emebdedded system for automotive and railwau application. The system shall work in the range of 12 to 36 V DC (24 V DC nominal voltage trough a battery) and the maximal input current (nominal case) will be 10 A. The TPS2663 seems to be a good cadidate excpet for the max current. It seems I can use 2 TPS266 in parallel but is there any specific way to connect the 2 TPS2663. Another solution could be the use off a LM74700-Q1 with a high side switch . Thanks for your answer rRgards Eric + +Hi Eric, Thanks for reaching out! Doesn't you need automotive grade part ? LM74700-Q1 cannot be used as a high-side switch. Please look at LM5060-Q1 for automotive applications and let me know your thoughts. What is the max load current ? Best Regards, Rakesh + +Hi Rakesh Thanks for your quick answer I don't really need automotive grade components I know that LM747000 is not a high side switch, I just want to use it to protect the system from reverse battery connection. The Idea is to use a LM747000 to protect frombattery reverse connection followed by 2 x TPS2663 in parallel. The transcient protection will be done using TVS diode in front of the LM747000. Do you think this could be a good solution? If so can you please explain me how to configure the TPS2663 to make them work in parallel (just connecting the 2 out together? Or is there any specific way to do that?). The maximum nominal load current will be 10 A and I can limit the inrush current to a very close value of that max nominal current because the max load current when power supply is on will be less than 2A. I have a look at the LM5060 data sheet perhaps it can satisfy my requirements. In fact I need to protect the font DC/DC converter of my system from reverse battery connection and for overvoltage. I also need to limit the inrush current to approximatively 15 A during 1 second. As I understand the LM5060 doesn't limit the current it shuts down if there is an overcurrent so it's not really a current limitation for inrush current. I also don't understand how the current limit value is set on this device. Best regards ERic + +Hi Eric, TPS2663 can be used in parallel configuration following the concept discussed in app note /lit/an/slva836/slva836.pdf however we need to yet evaluate it. I have attached the circuit configuration. You would need single BFET (external FET) capable of handling full load current and then parallel TPS2663. Connect IN, OUT, IN_SYS, UVLO, OVP, dVdT, ILIM, IMON pins together for time synchronization and uniform reference settings. TPS2663_parallel_config.docx Best Regards, Rakesh + diff --git a/data/text/DLP3/899247 b/data/text/DLP3/899247 new file mode 100644 index 0000000000000000000000000000000000000000..4d3ffe55e74d9cc39af95f636915a8a0c32a2042 --- /dev/null +++ b/data/text/DLP3/899247 @@ -0,0 +1,6 @@ +BQ25150: How to detect battery charge current in pre-charging mode + +Part Number: BQ25150 Hello , I want to read battery charging current in pre-charging mode. In BQ25150's data sheet, the formule is as -> %ICHARGE = (ADCDATA_ICHG*100)/0.8*65536. But this is for fast charging current. Battery charge current in PRE = 22.5 mA & In FAST = 110 mA. Pre-to fast threshold = 3 V. If battery voltage is 2.8 then it gave 110mA.why ?? How to detect battery charge current in pre-charging mode ?? /Akshay P + +Hello, The charge current equation is the same for pre charge and fast charge. Since the value returns a percentage, you should get back the percentage of the pre-charge current setting. + diff --git a/data/text/DLP3/899251 b/data/text/DLP3/899251 new file mode 100644 index 0000000000000000000000000000000000000000..5fad8361ea6769465ea0c9940cf2c4fb121a920e --- /dev/null +++ b/data/text/DLP3/899251 @@ -0,0 +1,10 @@ +LM3880: LM3880 + +Part Number: LM3880 when simulating the LM3880 sequecner i obtained those results , i was supposed to have three power-up sequences after 10ms because the value of C1 is designed such as the EN pin set on after 10ms according to the datasheet of LM3880. i did the right schematic circuit as in the datasheet . why didn't i obtained the right results ? + +Hello With 56uf cap, the delay is 10s instead of 10ms T = 1.25*C/7uA. Regards Yihe + +i did the simulation again with C1 = 0.056uF which correspond to 10ms delay on EN voltage , but as you can see neither EN voltage signal is delayed nor the sequence Flag1 is set correctly , it should waits 10ms after the EN voltage is set , which means 20ms for Flag1 to be released, help me get the right sequence signals please + +Hi The EN comes with VCC together therefore it violates the device function spec Could you just run the default model without any modification to see whether you can get correct output? Regards Yihe + diff --git a/data/text/DLP3/899255 b/data/text/DLP3/899255 new file mode 100644 index 0000000000000000000000000000000000000000..852b3be5abe28e515a7dfb1a9a03b379fc4c8827 --- /dev/null +++ b/data/text/DLP3/899255 @@ -0,0 +1,6 @@ +TPS2372: PMP21115: Schematics + +Part Number: TPS2372 Hi, Can you please support with the schematics of the reference design. + +Hello Akash, Please accept my connect request and we can continue this conversation in private messenger. Additionally we have a dual PoE with Redundancy on the web: If this post answers your question, please indicate so by marking this thread as resolved. Thank you. Regards, Michael P. Applications Engineer customer organization + diff --git a/data/text/DLP3/899265 b/data/text/DLP3/899265 new file mode 100644 index 0000000000000000000000000000000000000000..285fbd3a6ee9669717ff4f9b8c9c56baa67d1f2b --- /dev/null +++ b/data/text/DLP3/899265 @@ -0,0 +1,10 @@ +BQ25601EVM-877: Can you provide EVM schematic file? + +Part Number: BQ25601EVM-877 Hicompany team, Can you provide EVM schematic file? (ALTIUM) Please check.. Thanks, Downey KIM. + +Hi Downey, Page 15 of the BQ25601 user guide shows the full schematic of the EVM: /lit/ug/sluubl4a/sluubl4a.pdf This is exported directly from Altium and shows the exact same information as the altium schematic src file. + +Hi Kedar, The circuit diagram in the Guide document was checked. I requested a scr file to facilitate circuit design. could you provide the altium schematic src file? My e-mail address is below. downey.kim@arrow.com Thanks. + +Thread resolved offline. + diff --git a/data/text/DLP3/899275 b/data/text/DLP3/899275 new file mode 100644 index 0000000000000000000000000000000000000000..17611affd68abf39262e5539ad831fc916944652 --- /dev/null +++ b/data/text/DLP3/899275 @@ -0,0 +1,6 @@ +BQ25616: No Battery condition + +Part Number: BQ25616 Hi, Iam planning to use BQ25616 battery management IC in my design with input volatge 5 - 12V at 2A, In my design sometimes there wont be battery available but input power supply will be there in that case will I get output from the SYS Pin? what will be the voltage i will be getting as output if battery is not there? + +Hi Revanth, When there is no battery connected AND charge is enabled, the device tries to regulate VBAT to charging voltage (VREG) then terminate. After certain time, VBAT may drop below recharge threshold and the device charges VBAT to charging voltage again. So the charger status switches between charging in progress and charging complete and STAT pin blinks. As battery is absent, the output capacitor is being charged, so the cyclic transition is a function of recharge and termination deglitch timers, as the small output capacitance will charge quickly compared to a real battery. Section 9.3.6.1 Narrow VDC Architecture describes behavior of VSYS w.r.t VBAT. As VBAT (when battery is floating) is around the VREG voltage (> VSYSMIN) BATFET is fully on and the voltage difference between the system and battery is the VDS of the BATFET, so VSYS will also track VBAT as VBAT behavior is described above. + diff --git a/data/text/DLP3/899277 b/data/text/DLP3/899277 new file mode 100644 index 0000000000000000000000000000000000000000..0808419c92daf3677e0e43a374b0895412527703 --- /dev/null +++ b/data/text/DLP3/899277 @@ -0,0 +1,8 @@ +BQ7718: Replacement protector for Lithium Titanium Cells + +Part Number: BQ7718 Hello Team, One of my customer had the following question. we would like to use the BQ40Z80 also for lithium titanate cells, therefor we need a battery protector similar to BQ7718 with 2.9V cut off, doescompany has something like that? Two questions from my side. Is BQ77915 the best Protector replacement? (that's what i proposed him, BQ7791500 to be precise) Would the BQ40Z80 work here? (Stupid question probably but, do we need special FW for different Cell chemistry?) Thanks and Best Regards, Needhu + +Hi Needhu, The BQ77915 is factory programmed and available versions only have OV down to 3800mV. If a new part number was created, the lowest OV voltage possible to program is 3000mV. So I do not think this would work for this application. The BQ40Z80 might work here. The protection thresholds are programmable and could be configured for this battery type. It also has secondary protection features, so some users use it as the primary and secondary protector (although some users like to have a separate device). Since this might be the only option for this application, I suggest creating a new E2E question on the BQ40Z80 - this way it will be assigned to a gauge expert that can answer all of the questions about this device. Best regards, Matt + +Hi Matt, Thanks for the feedback. Best Regards, Needhu + diff --git a/data/text/DLP3/899288 b/data/text/DLP3/899288 new file mode 100644 index 0000000000000000000000000000000000000000..f8cd19cc2ceecf777b5e9ea09c3966f6f81cb898 --- /dev/null +++ b/data/text/DLP3/899288 @@ -0,0 +1,18 @@ +TPS544C20: Two issues in latest 7.2.1 GUI + +Part Number: TPS544C20 Hi expert, Please help confirm below two issues in 7.2.1 GUI. Issue 1: When customer creates one off-line project, their choice is as shown. There is one error, for TPS544X20’s package is LQFN. Issue 2: Here comes the question: The revision in GUI is 0x2, but in datasheet is 0x3. Obviously, it only supports to read. + +Hi Shenhua, Thanks for bringing this to our attention. We will confirm it and get back to you. regards, Gerold + +Shenhau Zheng, The revision code in the TPS544C20 project file is likely from a pre-release version of the TPS544C20 and has not been updated to align with the release version. It will not affect the functionality of the project file as the revision code will be masked out during device identification when loading the project file. As for the packages, I will review them with the FUSION team and see if we can get them updated and aligned prior to the next FUSION release. + +Hi Peter, Different revison code will cause different Devide_code, and Devide_code is just for reading. I don't know if it will bring new problems if someone use .csv files, because for now we have ignored Device_code in our verification. Thanks, Haojie + +haojie tian I will check on the programming script file, but most likely it does not contain verification of DEVICE_CODE because it is read-only. When loading a project file, FUSION does not ignore the DEVICE_CODE, only the lower 4 bits that make up the REVISION_CODE, bit 15:4 are still used. + +Thanks Peter! If you think it's OK to keep no change about revison 0x2 in FUSION, we are OK. As I know, before generating the script file, it could choose not check the box of 'including the device_code'. And in the script file, it does not contain verification of Device_code. The reason why I ask this is: #1. I checked the box of 'including the device_code' #2. Our former code checked all READBYTE/READWORD lines in the script file, now we just check the READBYTE/READWORD lines the same as script does - check the lines below 'pause'. Now it could pass. + +I will check with the FUSION team in the morning, we should be able to get this fixed in the next release, but it has most likely been this way since the TPS544C20 released in 2014. + +Understand, it's up to your side. Thanks! + diff --git a/data/text/DLP3/899291 b/data/text/DLP3/899291 new file mode 100644 index 0000000000000000000000000000000000000000..ceb88b5fc660fa5238658b3aa083eb3c934b389d --- /dev/null +++ b/data/text/DLP3/899291 @@ -0,0 +1,10 @@ +TPS63070: Do a second regulator needed for with along with TPS63070? + +Part Number: TPS63070 Dear TI, I am currently using TPS63070 for my wireless board, where TPS63070 regulates USB supply for RF Front End to maintain 5V. Another reason TPS63070 was used for different battery voltages. Initially I had other issue where COM port resets when RF Front End supplied from TPS63070, but now this issue solved. But I suppose there is a switching delay with TPS63070, this need further confirmation on my side. Question: Is TPS63070 is appropriate regulator to use to regulate USB supply, and able to support fast WiFi RF transmission, if not, I am planning to split power management a per below, a. When USB plugged in, I can usecompany TPS7A52, and TPS63070 can be off, b. When USB unplugged and board running on battery, TPS7A52 can be off and TPS63070 on and supply the entire board. Is this a good approach to go and please comment or recommend where needed. BRgds Manimaran Kanesan + +Hi Manimaran, Thanks for reaching out. Just to confirm first, what are your input and output voltages, and what is the output current? Best regards, Milos + +Hi Milos, Thanks for the reply, The input voltage is USB 5V, for output, a. RF Front End need 5V typical (Min 4.75 and Max 5.15). b. For Host 3.3V, I have regulator for this. When USb unplugged, then using battery, is from 3V to 7.4V (two cell), but the design Max for 12V input. W Total current Max current is 750mA. BRgds Manimaran + +Hi Manimaran, The TPS63070 can handle both the battery and the USB input. Just note that the output current is limited during startup. But once the device starts up, it can support your full load. Best regards, Milos + diff --git a/data/text/DLP3/899292 b/data/text/DLP3/899292 new file mode 100644 index 0000000000000000000000000000000000000000..fc5712b3625a7eb835ff088dbe0c4b08b7c2f38e --- /dev/null +++ b/data/text/DLP3/899292 @@ -0,0 +1,6 @@ +TPS27S100: Can I AND the FLT# with EN + +Part Number: TPS27S100 I would like to quicken the short circuit response time of my TPS27S100 based circuit and am considering placing an AND gate at the enable pin. The inputs to the AND gate would be the FLT# and an enable driven by a microprocessor. I assume this would create some type of oscillation due to the time delays of circuit but I am hopeful it will keep my current spike amplitude lower. The microprocessor will eventually respond to the FLT# and deassert the enable. See embedded image below. Can you see any flaws in my plan or recommend any other way of quickening the short circuit response of the TPS27S100? I am currently seeing ~170us current pulse when I assert the enable with a short to ground on the output. The datasheet claims it will shut down in less than 1us but I am not seeing that. + +Hello Wayne, The 1uS number is the specification for if the device is already enabled and a short-to-ground condition occurs. Chances are you would not gain too much time with this logic as there is an inherent latency from when the device turns on to when a fault is reported on the FLT line- which is the 170uS you are seeing on the line. By connecting this to the AND gate you would likely be aggregating the latency on the additional latency required to deassert the pin via the AND gate. + diff --git a/data/text/DLP3/899296 b/data/text/DLP3/899296 new file mode 100644 index 0000000000000000000000000000000000000000..aa31826d8df7a8605e2b98cb5014945e73f4e072 --- /dev/null +++ b/data/text/DLP3/899296 @@ -0,0 +1,10 @@ +UCC21222: Output spikes + +Part Number: UCC21222 Hi I am trying to simulate a very basic Class D audio power amplifier. My problem I have is there appears to be shoot through current between my two swtiching nmos mosfets. I tried avoiding the shoot through current by implementing the dead time control, but it doesn't seem to stop the shoot through currents. An example is when output A is and output B pulses high, output A tends to have a tiny spike has output B pulses high. This tiny spike causes the two nmos mosfets to turn on at the same time causing a shoot through current. Is there anything I am doing wrong that I have done that would the low output to have a tiny spike when the other output goes high? + +Hi, Wing, Is this a simulation? + +yes this is a simulation in ltspice of the gate driver + +Hi, Wing, I would try adding a gate resistor of 10-33 ohms from the output of the driver to the MOSFETs. Let me know if this helps the situation. + diff --git a/data/text/DLP3/899297 b/data/text/DLP3/899297 new file mode 100644 index 0000000000000000000000000000000000000000..7d108e2610519cd496631f8759ce2c291c4d6bde --- /dev/null +++ b/data/text/DLP3/899297 @@ -0,0 +1,6 @@ +BQ24192: BQ24192 default register settings and autonomous mode understanding + +Part Number: BQ24192 Hi Ning, I have tricky questions on this Watchdog functionality. 1. We are successfully able to run the charging cycle by Host and for that, we are using the Watchdog Timer disable functionality and we are selecting the Charging current by our Own. 2. We have created Some Voltage loops in that we are reading the Voltage from Fuel gauge and we are deciding on the charging current for the Battery charger. 3. For 2.8V to 3.2V, we are supplying the 140mA current for charging. 4. We have one Power ON/OFF button as well that can turn off the Host but battery can still remain present and connected with the Battery Charger. 5. Now, my query is that if the Charger is in 140mA charging current state and we are disabling the Watchdog timer also and if the user has turned off the host via Power ON/OFF button, then Charger may remain present in this 140mA state only or is there any way such that charger may start functioning with the fast charge current as well automatically? Thanks Saumil + +Saumil, As long as VBUS stays above VVBUS_UVLOZ or VBAT stays above VBAT_UVLOZ, and watchdog timer is disabled, charge current settings for fast charge and precharge should not change if the host is turned off. Thanks, Ning. + diff --git a/data/text/DLP3/899298 b/data/text/DLP3/899298 new file mode 100644 index 0000000000000000000000000000000000000000..79b521304d8aa9d3706d69ff5511f788cff94beb --- /dev/null +++ b/data/text/DLP3/899298 @@ -0,0 +1,8 @@ +BQ24780S: Register default + +Part Number: BQ24780S Hello Expert, In BQ24781 datasheet table 4 default register, 0x3BH is 0XC210H, but in the datasheet, it should be 0xC200H, could you help confirm which one is right? thanks. + +Hi, Penn, 0xC210H is the default value. + +Thanks, Tiger. + diff --git a/data/text/DLP3/899299 b/data/text/DLP3/899299 new file mode 100644 index 0000000000000000000000000000000000000000..14d96d244b30e01604c6d3c12bb04ce56affb822 --- /dev/null +++ b/data/text/DLP3/899299 @@ -0,0 +1,6 @@ +LM5050-1: LM5050-1 gate driving capability + +Part Number: LM5050-1 Hi Team, I have a 1000W power project using lm5050. Because this IC is used for the first time, please help me to have a look. The schematic diagram is as follows, There are two power supplys, so 2pcs lm5050 are used like datasheet), one power supply is 27V 1000W, another is 24V lead-acid battery, power 1000W, current more than 40A. Each LM5050 drives 2 pairs back-to-back N-MOS, which means 4 N-MOS q23, q24, q25 and q26 in picture above. MOSFET is AOTL66608 like below Could you help me to double check below:ow: Question 1: Is the LM5050-1 gate driving capability sufficient to dirve 4N-MOS? Question 2: When the output voltage is higher than the input voltage, whether the IC can shut down MOS normally with this Back-to-back structure? Question 3: Is there any difference or preferance for VS connected to input or the output? Thank you very much! Best Regards + +Hi LM5050 can not be used to drive two back-back NMOS due to the gate drive. Because, MOSFET is turned off by connecting Gate to IN. For the first MOSFET, this means Gate-Drain is short, so this MOSFET will not be turned off. We recommend to use LM5060 along with LM5050 or LM74700. Regards, Kari. + diff --git a/data/text/DLP3/899300 b/data/text/DLP3/899300 new file mode 100644 index 0000000000000000000000000000000000000000..250db793c7929de54beb327802506007888d934a --- /dev/null +++ b/data/text/DLP3/899300 @@ -0,0 +1,10 @@ +LDC1614: Using multiple coils to remove external interference + +Part Number: LDC1614 My LDC1614 implementation uses three coils to sense a single target. Since we have multiple coils, we can compare them to remove ambient interference. I'm wondering if there is a best practice approach for this, as I can see drawbacks in the methods that we're currently using. I'm attaching pictures pre and post-filtering. Graph 1: Graph 2: Here are my questions: 1. Is this an expected amount of interference? I've done extensive prototyping on the EVM and I never saw as much as I'm seeing in graph 1. The EVM essentially looked exactly like graph 2 without special settings or math. That makes me think there's some functionality on the LDC side that I'm unfamiliar with, that is already filtering some or all of this interference. 2. If there is no internal interference subtraction with reference coils, is there a best practice approach to this? If we use LDC1 as a baseline and do a diff, we're essentially operating such that the system is at most as reliable as LDC1. If we do the following: LDC1filtered = LDC1raw - LDC2raw LDC2filtered = LDC2raw - LDC3raw LDC3filtered = LDC3raw - LDC1raw Each sensor is only taking advantage of one reference sensor at any time. In both calculations, as the target approaches any one coil, that signal will be subtracted from the other coils as well. That's the source of the big difference in the shape of each of these curves between graphs. + +Hi Jordan, It would help me answer your questions if I had some additional information about your setup: Are all of your coils the same size? Are they they same distance from the target? What is the target? How does it move in relation to the coils? Are you using the internal oscillator or an external oscillator? Are you trying to sense the absolute position of the target? General information about your application would also be helpful. Best Regards, + +Hi Kristin, thanks for your reply. I sent you a DM with some specifics but I'll put the general answers here. 1. Yes, all 10mm 4 layer coils. The target moves closer and further from each of the coils as its position moves. Almost like triangulation. 2. The target moves at an angle closer and further from the coils. 3. Internal 4. Trying to sense the angle of the target, so essentially yes the position of the centroid of where the target interacts with the inductive field. But more generally, we're seeing a very clear noise signal that impacts all coils the same. You can see essentially each peak in the graphs above are shared between all signals. That's why when we do a simple diff, we get such clean signal. What I'm trying to figure out is: 1. How should I go about diagnosing the source of this noise? Where would you personally begin? My coils are relatively simple, and do not result in this interference pattern when connected to the EVM. The noise exists when the target is stationary. 2. What methodologies can be used in firmware to remove noise that is so clearly impacting all sensors? It all seems like very low frequency noise, so I'm not sure if we can identify and remove similar frequencies. + +Hi Jordan, Thanks for providing the requested information. I'll respond to your private message as well. I think the biggest source of your noise is the internal oscillator. We use an external oscillator on the EVM that has less jitter, and we recommend that all precision applications use an external oscillator. The noise in your first measurement looks fairly typical of the internal oscillator, which is why I asked about it. If you have a footprint available for an external oscillator, I suggest populating it. If not, I suggest continuing your testing with the EVM until you can create another iteration of your board. The best way to remove this noise is to use an external oscillator. If you need to remove noise due to changing temperature as well, I suggest using a ratiometric approach instead of a differential approach with your reference sensor. Instead of LDC1filtered = LDC1 - LDC2 you would use LDC1filtered = LDC1/LDC2 Best Regards, + diff --git a/data/text/DLP3/899303 b/data/text/DLP3/899303 new file mode 100644 index 0000000000000000000000000000000000000000..946f9095ee76e6676225a6cad118f4cbabbbf951 --- /dev/null +++ b/data/text/DLP3/899303 @@ -0,0 +1,6 @@ +FET with dual side cooling + +Hi team, do we have any Mosfet 60V (N-Channel) dual side cooling con Rds(on) <1mOhm, like the ones from VISHAY? Thank you and best regards, Adrian + +Hi Adrian, Thanks for the inquiry. The only dual cool partscompany offers are the CSD88584Q5DC and CSD88559Q5DC power blocks. We previously EOL'd all of our discrete FETs in dual cool packages. + diff --git a/data/text/DLP3/899315 b/data/text/DLP3/899315 new file mode 100644 index 0000000000000000000000000000000000000000..a6670205f59ae938e13af740e9af587b3a106576 --- /dev/null +++ b/data/text/DLP3/899315 @@ -0,0 +1,6 @@ +TPS7A88-Q1: foldback current limit profile + +Part Number: TPS7A88-Q1 Team, I am working with the TPS7A88-q1. I was wondering if you could help me get some information on the foldback current limit profile. Is there some kind of equation or method that we could use to estimate the output current limit as a function of output voltage? Thanks! + +Hi Michael, I don't have an equation for you but below is a graph showing the current the LDO provides when a certain percentage of the nominal output voltage is forced on the output pin. In case it is helpful, I've also attached the data used to create that graph. TPS7A88 Foldback Current Limit Data.xlsx + diff --git a/data/text/DLP3/899319 b/data/text/DLP3/899319 new file mode 100644 index 0000000000000000000000000000000000000000..c6d45654698a4d303993394f7fa9f67f6619b69d --- /dev/null +++ b/data/text/DLP3/899319 @@ -0,0 +1,8 @@ +UCC28600: Can Pin1 Soft Start be used to shut the device off? + +Part Number: UCC28600 As the title suggests my question is; Can I use the Soft Start, pin 1, to turn the UCC28600 controller on and off? It works on the bench but wonder if this is OK to do or will there be a problem doing this? My intention is to use a switch on the secondary side then opto-isolate the switch to the primary side to pull pin 1 low. In this way I can turn the power supply on and off with the mains voltage still applied. Thanks for your help. + +Jim Yes you can. There is no concern fromcompany about having you pull SS pin to GND to disable operation as you have done. Best Regards, Eric + +Eric, Thank you for confirming this. Best, Jim + diff --git a/data/text/DLP3/899323 b/data/text/DLP3/899323 new file mode 100644 index 0000000000000000000000000000000000000000..69348d37f37602390a169e424eb496d900ef3167 --- /dev/null +++ b/data/text/DLP3/899323 @@ -0,0 +1,10 @@ +BQ40Z50-R2: BQ40Z50-R2 Sample Rate + +Part Number: BQ40Z50-R2 Hicompany team, I have couple questions about measurement for BQ40Z50-R2. For example, I have a pulse discharge with 15mA of 1s, 100mA of 0.1s, 150mA of 0.2s, and 200mA of 0.7s. The total period is 2s. Will the IC be able to measure every peak of the discharge current per period for current measurement? With such discharge rate, will the fuel gauge be able to account all peaks per period for capacity measurement? Or will the fuel gauge accuracy be decreased for such discharge? Thanks in advance! Best Regards, Zhihan + +I have assigned your question to my colleague and we will get back to you. Andy + +Zhihan, Does this load profile repeat continuously? The issue will be getting resistance updates if this is a pulse and rest for a long time. For resistance to update you need to be in discharge mode for an extended time. The gauge will capture all of the charge from this pulse, so your passed charge will be accurate. thanks, Eric Vos + +Hi Eric, Thank you for your help! Yes, the load will be repeated every 2s until fully discharged. So regardless the resistance, the fuel gauge will just account every peak right? The resistance here you mean the resistance of the cell right? Another question is what if I lower the dsg threshold to force to stay in discharge mode, what may be the good or bad impacts for the fuel gauge? Thanks again, Zhihan + diff --git a/data/text/DLP3/899334 b/data/text/DLP3/899334 new file mode 100644 index 0000000000000000000000000000000000000000..f0859eac3f2ffc5cc3bf4dbb87b7064b644d2a32 --- /dev/null +++ b/data/text/DLP3/899334 @@ -0,0 +1,6 @@ +TPS2511EVM-141: Snubber Circuit to reduce EMI + +Part Number: TPS2511EVM-141 I utilized the TPS2511EVM-141 components and layout in a design with a BLE connected device and the Circuit is failing radio emissions testing due to EMI created by the switching regulator, TPS54240. On the EVM board there is a flyback diode, D3. In other designs I have seen a snubber circuit utilized in parallel with this diode to minimize any ringing that may occour. I would like to know if there are any recommendations for values of a capacitor and resistor series to go in parallel with D3 as a snubber circuit for use with the components and respective values in on the EVM board that will effectively reduce ringing on the output of the TPS54240 and minimize EMI. See attached Data sheet, schematic on PG 4. Thank youTPS2511EVM-141.userGuide.pdf + +Hello, D3 on the EVM is a Schottky diode, and on this system, it is used to prevent the possibility of large ground currents into the TPS2511 during sudden disconnects due to inductive effects in a cable. I do not have any recommendations for a snubber circuit to help with EMI as the TPS2511 is just a load switch and not designed to reduce EMI from upstream devices. I recommend reaching out to the TPS54240 team to see if they have any recommendations on a filter or how to make the output of the TPS54240 more stable. Post a new question, but put the TPS54240 as the part in question. This will assign it to the proper team. + diff --git a/data/text/DLP3/899337 b/data/text/DLP3/899337 new file mode 100644 index 0000000000000000000000000000000000000000..91c43652621cdb1a4ce7bac6c63337dba1a7a142 --- /dev/null +++ b/data/text/DLP3/899337 @@ -0,0 +1,8 @@ +UCC21710-Q1: How to connect OC for desaturation and CLMPI for active miller clamp when BJT current buffer is used + +Part Number: UCC21710-Q1 Hi, When the BJT current buffer (shown on page 46 of the datasheet of UCC21710-Q1 and the E2E post /.../798930 is used to increase the driving current capacity, how should the two pins OC and CLMPI be connected to accomplish desaturation and active miller clamp? Should we still use the circuit shown on page 41 of the datasheet to connect pin OC for desaturation, and directly link the gate of the MOSFET (the actual switching component being driven by the BJT current buffer) to CLMPI pin for active miller clamp? Also the post for soft-turn-off circuit in the E2E post shown above is no longer available. Can you show details of how to design the soft-turn-off with a resistor and capacitor between the base of the transistor and VEE? Thanks. + +Hello, Yes, both functions are implemented with the same connection as given in the datasheet. The buffer only presents some difference in the STO circuitry because the buffer is driven with OUTL (instead of OUTL directly connected to the MOSFET gate), thus OUTL cannot control the STO current successfully unless there are some added components. The Miller clamp pin, CLMPI, must still be directly connected to the gate of the MOSFET in order to provide a low-impedance path to VEE in order to prevent false turn-on. The DESAT circuit with OC pin is also same as shown in the datasheet. Please see the datasheet section entitled "Higher Output Current Using an External Current Buffer" for choosing the R and C value for controlling STO when using an external BJT buffer. Additionally, see the XL Calculator tool here that also has a sheet for calculating the R/C values for STO with Buffer and the resistors for DESAT circuit using the OC protection. Regards, Audrey Please click the green button if I answered your questions! + +Hi Audrey, Thank you very much for providing insightful, accurate, and prompt reply. Your help is highly appreciated. Have a great day, Guanghui + diff --git a/data/text/DLP3/899340 b/data/text/DLP3/899340 new file mode 100644 index 0000000000000000000000000000000000000000..713eaa324349e6cc7a1af099092826e4069ad60d --- /dev/null +++ b/data/text/DLP3/899340 @@ -0,0 +1,6 @@ +TPS794: TPS79433DCQR operating temp range? + +Part Number: TPS794 Hi team, what is the operating temp range of this device? The Electrical Characteristics table says "Over Recommended operating temp range (Tj=-40C to 125C)" but the orderable tables at the end of the datasheet says Op Temp ('C) of -40C to 85C. Is it 85C or 125C at the top end? + +Hi Kannan, Thanks for pointing this out, as the part EC table has data up to 125C, I would use 125C for the top end. The orderable tables are wrong. Regards, Jason Song + diff --git a/data/text/DLP3/899344 b/data/text/DLP3/899344 new file mode 100644 index 0000000000000000000000000000000000000000..71a9c2c8c74ad18d6e1aa4aeb43aec2214ec7415 --- /dev/null +++ b/data/text/DLP3/899344 @@ -0,0 +1,8 @@ +LMT70A: Suggestion for temeperature monitoring wearable band + +Part Number: LMT70A Hi Team We are making a wearable band withing the range of +-0.1 degree centigrade to measure body temperature by sensing temperature on wrist. 1) Doescompany has any design for same/ Similar application? 2) Please suggest which part we should proceed as we have to make very cheap band 3) We are thinking of mounting a metal part/ thick pogo pin on bottom side PCB in such a manner that it come out of mechanical surface and tough skin. Do you have any suggestion for such part ? Doescompany used any such part off the shelf part in there internal testing while making probe of any wearable heart rate monitor/ECG, if so please suggest part no 4) while going through /lit/an/snia021b/snia021b.pdf on page no 4 it is mentioned that "Better results can be obtained if underfill material is added surrounding the LMT70 die (package) as shown in Figure 4." Can you please tell any example of material which can be used ? 5) We have one concern that suppose user didn't tied his wearable we may not able to measure temp properly . Do you have any suggestion how we can give notification that probe not properly touching hand ? we are thinking of proximity sensor( not sure about sensitivity) and SPO2 sensor (disadvantage is high current consumption and cost ). 6) How sweat under the probe can impact temperature measurement. Consider use case person is in 40 degree ambient and we need to measure temperature every 30 min. + +Hi Abhishek, Below is my feedback. 1) Doescompany has any design for same/ Similar application? Please see this FAQ for design information on this topic. /.../895494 2) Please suggest which part we should proceed as we have to make very cheap band For 0.1 °C applications I would suggest either TMP117 or LMT70. 3) We are thinking of mounting a metal part/ thick pogo pin on bottom side PCB in such a manner that it come out of mechanical surface and tough skin. Do you have any suggestion for such part ? Doescompany used any such part off the shelf part in there internal testing while making probe of any wearable heart rate monitor/ECG, if so please suggest part no Please see these reference designs for reference: 4) while going through /.../snia021b.pdf on page no 4 it is mentioned that "Better results can be obtained if underfill material is added surrounding the LMT70 die (package) as shown in Figure 4." Can you please tell any example of material which can be used ? Let me check to see what underfill material was used in that app note. 5) We have one concern that suppose user didn't tied his wearable we may not able to measure temp properly . Do you have any suggestion how we can give notification that probe not properly touching hand ? we are thinking of proximity sensor( not sure about sensitivity) and SPO2 sensor (disadvantage is high current consumption and cost ). You could try usingcompany CapTIvate technologies for low power contact detection: 6) How sweat under the probe can impact temperature measurement. Consider use case person is in 40 degree ambient and we need to measure temperature every 30 min. Sweat will have a different thermal conductivity than your skin, but as long as there is a good thermal path from the wrist to the temperature sensor and the temperature sensor is not exposed to sweat directly there shouldn't be any concerns. + +Hi Abhishek, As for the underfill, E1216M is a common underfill material that is used in assembly houses. Thanks, David + diff --git a/data/text/DLP3/899353 b/data/text/DLP3/899353 new file mode 100644 index 0000000000000000000000000000000000000000..ed0a20d6f412520ee223467df83b0e63f2a25caf --- /dev/null +++ b/data/text/DLP3/899353 @@ -0,0 +1,8 @@ +UCC28600: Flyback Transformer Help + +Part Number: UCC28600 Hello, I am designing a flyback converter with a 19V, 5A output, and I am having some trouble finding a transformer for my application. I am pretty sure I will have to essentially make my own transformer custom transformer, but I am not sure where to begin with that. Below are some parameters that I think are relevant. Voltage on the primary side - 170VDC (literally just rectified 120VAC) Peak current on the primary side - 3.8A (based on an 80KHz switching frequency, and a primary inductance of 155uH) Np:Ns - 13:1 (primary : secondary winding ratio) Np:Naux 26:1 (primary : auxiliary winding ratio) I am just looking for some resources that will help me get what I need to make this transformer. Best, + +Michael Typically for AC/DC designs that use a flyback converter the transformer is a custom design for the specific application. As a result, many magnetic vendors, such as Wurth or Renco, can quickly build a transformer based on few key electrical parameters for your design. I recommend reaching out to these vendors to confirm what exactly they need, but in general they require max operating frequency, desired inductance, input voltage range, output voltage (including auxiliary to power UCC28600), output current on each output and isolation rating. If you have not already, we recommend that you use our excel design calculator /lit/zip/slvc104 to determine the circuit parameters that the magnetics vendor needs to start their design. Best Regards, Eric + +Hey Eric, Thank you so much, this is exactly what I needed! + diff --git a/data/text/DLP3/899355 b/data/text/DLP3/899355 new file mode 100644 index 0000000000000000000000000000000000000000..3abc6c53a79ba184a12cf56342dd2f0d4763b2f0 --- /dev/null +++ b/data/text/DLP3/899355 @@ -0,0 +1,6 @@ +TPS23753A: if TPS23753A supports non-isolated application? + +Part Number: TPS23753A HI team, if TPS23753A supports non-isolated application asTPS23750 , I have not found in datasheet. Thanks. BR Sara + +Hi Sara, Thank you for your question. Yes, the TPS23753A can be used in non-isolated applications. You can take a look at our PM40355 reference design which uses the TPS23753A in a class 3 non-isolated design: /tool/PMP40355 If you would like to provide the system level specifications for this design (output voltage/current, key care abouts: size, cost, efficiency, etc.) than I may be able to help recommend a reference design to meet your system level needs. Please let me know if you have any questions. Thank you! Best Regards, Brett Colteaux PoE Product Marketing Engineer + diff --git a/data/text/DLP4/900165 b/data/text/DLP4/900165 new file mode 100644 index 0000000000000000000000000000000000000000..c19c2e928811788dee1502e3f6e8cb8e6a64a8b3 --- /dev/null +++ b/data/text/DLP4/900165 @@ -0,0 +1,6 @@ +BQ76940: Balancing + +Part Number: BQ76940 Hi, I wanted to know on balancing, Balance condition any cell > than 4.0vdc. One of cell reaches unbalancing and shows volts of 4.3vdc, and rest of the cell @3.9vdc. So balancing will start now, to balance 4.3vdc cell and will bring it to less than 4.0vdc , now here once cell volt is reduced to 3.9vd, do programmer have to stop balancing or how will the balancing will be stopped? Rohit + +Hi Rohit, The host controls when to enable and disable cell balancing on each cell. Matt + diff --git a/data/text/DLP4/900166 b/data/text/DLP4/900166 new file mode 100644 index 0000000000000000000000000000000000000000..eb54e15af4be37d9e696deaf2c1e37be124f0a06 --- /dev/null +++ b/data/text/DLP4/900166 @@ -0,0 +1,8 @@ +BQ25505: Choosing vibration element + +Part Number: BQ25505 Hi everyone, We are designing a smart insole and we are willing to integrate energy harvesting (through step foot) as an auxiliary charging system. We have chosen the bq25505 charger and now we are investigating for vibration elements. We are looking for piezoelectric modules. Do you have to suggest as any piezoelectric module for our application that would be compatible with bq25505? As I mentioned this is going to be just an auxiliary charging system and we're not looking to cover our full power load. Thanks in advance Nick + +Hi Nick, Unfortunately, I do not have a specific vibration element. Keep in mind the charger must always boost so the VMPP << VBAT_OV<5.5Vmax. You will likely have to use a zener clamp on the element to protect the BQ25505 input. Regards, Jeff + +Hi jeff, First of all, thank you for your response!! However, I have some additional questions. 1. What you mean "charger must always boost"? 2. VMPP is the VOC_SAMP isn't it? 3. How did you choose Rsumoc = 20MΩ? 4. How did you choose VREF_SAMP = 0.14V? Thanks in advance Nick + diff --git a/data/text/DLP4/900175 b/data/text/DLP4/900175 new file mode 100644 index 0000000000000000000000000000000000000000..4e169296e2b8e9e7399f9d11a9f8c2e09d8ce9eb --- /dev/null +++ b/data/text/DLP4/900175 @@ -0,0 +1,8 @@ +UCC28730: Does not switch as expected, too low output voltage + +Part Number: UCC28730 Hello, Im trying to implement UCC28730 into a design. The input voltage should be 270 Vdc - 600 Vdc and output should be 24 Vdc. Im currently using the MOSFET C2M0280120 and the WA8759-al transformer. I have followed the calculation formulas in the UCC28730 datasheet, but still won't get the right output voltage or expected switching characteristics. Below are some photos on the circuity, scope on the gate of the MOSFET Any help on what could solve my problems here would be great. Best regards, David + +Considering the layout guidelines on the datasheet, I soldered the parts together like this: and got these results: Gate on mosfet: Source on mosfet: AUX1: VDD on UCC28730: Secondary side: Is this right behaviour? When I loaded the secondary side the MOSFET started switching faster. After this the circuit spontaneously failed and I think it was the UCC28730 that broke. When powered on VDD is now 0 V. + +Hello, Most likely you are shutting down due to a fault. One thing I would recommend is moving away from a TVS switch node clamp. I would recommend and RCD clamp on the switch node. Just put a 511K ohm and 1 nF capacitor across the 3 170V diodes. This should help reduce ringing. This design if you are not using the UCC24650 wake up chip will require at least 2 to 3 ma of preloading to keep in regulation under no load condition. You can just use a resistor for this on the output. Double check your transformer polarity to make sure it is correct for a flyback converter. The UCC28730 is trying to startup and it is given 3 gate pulses and it is not starting up due to the following. Input voltage is too low input under voltage Output voltage is to high triggering over voltage protection. Over current protection. The data sheet describes when fault conditions occur. You are correct that using a proto board to wire you power supply is not a good idea. You also appear to be using wire wound resistors. I would avoid doing that as well because they have large inductance. If they are low inductance you should be fine. I do have some recommendations for you. 1. Order the UCC28730 evaluation module so you can evaluate the power supply operation. The following link will get to the User's guide. /lit/ug/sluub75/sluub75.pdf?ts=1588013518855 2. Their is an application for troubleshooting PSR flyback converter at the following link that you may also find helpful. Regards, + diff --git a/data/text/DLP4/900183 b/data/text/DLP4/900183 new file mode 100644 index 0000000000000000000000000000000000000000..e52edb776f74061b2426fd631aed93f5d735aa4e --- /dev/null +++ b/data/text/DLP4/900183 @@ -0,0 +1,6 @@ +AWR2243: AWR2243 can supply to use the measure the distance? + +Part Number: AWR2243 Hi Our application is not an automobile. We use this ic to the industrial measuring system. If our application is not automotive, we can't receive this IC? We have to measure the distance up to 220 ~ 350M. Is it possible? Safe Stay! + +This IC can be used non-automotive area as well. But that depends on the usecase and its requirement for safety or non-safety compliances. AWR2243BOOST can get the object around 180-245m and depends on the type of object (truck/car/human etc). Again max range can be enhanced further by using a high gain antenna. Regards, Jitendra + diff --git a/data/text/DLP4/900184 b/data/text/DLP4/900184 new file mode 100644 index 0000000000000000000000000000000000000000..30d1acd6826af9014e209f5550c0c96fe9c3738d --- /dev/null +++ b/data/text/DLP4/900184 @@ -0,0 +1,6 @@ +AWR2243: 1Tx, 1Rx antenna can be used? + +Part Number: AWR2243 HI One more question. To make narrow-angle, we will design the antenna by 1Tx, 1Rx. This antenna can be applied to the AWR2243? Stay Safe! + +Hello Daniel, 1Tx, 1Rx configuration could be done in 2243. But in this case there will be no angle estimation possible. Regards, Vivek + diff --git a/data/text/DLP4/900187 b/data/text/DLP4/900187 new file mode 100644 index 0000000000000000000000000000000000000000..531e8b6cf16ad5bb422d21155543d42019875187 --- /dev/null +++ b/data/text/DLP4/900187 @@ -0,0 +1,14 @@ +LM3630A: Why the inductance exists whistle ? + +Part Number: LM3630A Hicompany team, My customer used LM3630A for Led driver . The Vin of LM3630A in their borad is 3.6V-4.3V and the number of led which maxium current is 10mA is 8. They found that the inductance exists whistle once the led lights. We will be appreciate ifcompany can help us to solve the whistle issue . Thank you! By the way. The following picture is their schematic. + +Hi Troyson, For your schematic, you have floated the "PWM" pin? How to achieve dimming? You need to connect the"PWM" pin to achieve the current dimming. ( Or connect the "PWM" pin to a high level) Are you toggling the "HW_EN" pin? And since you just use one channel, have you disabled another channel? BR Sean + +Hi Troyson, For your schematic, you have floated the "PWM" pin? How to achieve dimming? You need to connect the"PWM" pin to achieve the current dimming. ( Or connect the "PWM" pin to a high level) The dimming is controlled by I2C(Register_. Brightness A) Are you toggling the "HW_EN" pin? Yes.Customer input high level to enable the device . And since you just use one channel, have you disabled another channel? They do not connect the another chanel ,The led2 is floating Besides, we have tesed some waveforms. Hope it's good for you . We can find the frequency in Picture.1 & Picture.1 is <20khz which may cause the sounds Picture.1 The waveform in D3 (Diode)-2 pin Picture.2 The waveform in ILD1 pin Picture.3 The waveform in SW pin Picture.4 The waveform in SW pin Picture.5 The SCH + +Hi Troyson, Picture 1-3 can't show now and you need to disable the channel two with the regs. reg0x00= 0x84; reg0x01=0x08. And have you read the reg0x0B? this is a fault register that may have some information. BR Sean + +Hi Sean ， OK. Customer just used LED1.But they enable the 2 led chanel . So If customer float the LED2 pin .The deveice will work abnormally? + +Hi Troyson, No, it will detect the open led and works abnormally. Please disable the LED2 with regs if they don't use this channel. BR Sean + diff --git a/data/text/DLP4/900188 b/data/text/DLP4/900188 new file mode 100644 index 0000000000000000000000000000000000000000..c4e613f8c9783d05a066823c5361a70d7b97497b --- /dev/null +++ b/data/text/DLP4/900188 @@ -0,0 +1,8 @@ +CSD18540Q5B: Looking for pin to pin replacement mosfet like CSD18540Q5B + +Part Number: CSD18540Q5B Hi everyone, I'm using NVMTS0D4N04C mosfet for my application, but I need to change this mosfet with pin to pin mosfet. I would like to use the CSD18540Q5B mosfet but it is not pin to pin. If you have similar product, please let me know. Thanks! + +Hi Ali, Thanks for your interest incompany FETs. Unfortunately, we do not make any FETs in the same 8 x 8mm (POWER 88) package. You would need to change your board layout to accommodate either a 5 x 6mm SON or D2PAK device. + +Hi John, Thank you for the reply. If you have any part number for pin to pin connection, I would like to use it for my PCB. Then I can change the layout for revision 2. Same footprint is not important for my test. + diff --git a/data/text/DLP4/900195 b/data/text/DLP4/900195 new file mode 100644 index 0000000000000000000000000000000000000000..377fe672ccbee84c0bfce769c554d71720f45b78 --- /dev/null +++ b/data/text/DLP4/900195 @@ -0,0 +1,12 @@ +TPS61027: Is pin FB exposed in fixed version? + +Part Number: TPS61027 Hi, I would like to know if pin 3 (FB) is connected to the internal resistor divider in the 5V fixed version TPS61027. The functional block diagram in page 9 of datasheet only shows the adjustable version. If not connected to the internal resistor divider, could be connected to GND or VOUT? I am designing an intrinsically safe sensor so I need to be sure that the IC never exceeds 5V. Thanks! + +Hi Pablo, the FB should be floating in fixed version device. and the internal feedback resistor set the output to 5V. what is the input/output in your application? the TPS61027 is quite old device, maybe there is better solution. + +Hi Jasper, Thank you for your promt response. Jasper Li the FB should be floating in fixed version device. and the internal feedback resistor set the output to 5V. Yes, but my question is if the internal feedback resistors is connected to FB pin internally, so if there is a shortcircuit between FB and GND the output voltage will increase. If the FB is unconnected internally, I'll be sure there isn't any failure that could increase the output voltage. Jasper Li what is the input/output in your application? the TPS61027 is quite old device, maybe there is better solution. The requirements are: Voltage Input: 2.3 to 3.7V Voltage Output: 5V Load current: 5mA Fixed frequency (>1Mhz), Low noise PWM mode (no pulse-skip mode or power save mode), anti-ringing, fixed output, low quiescent current. I searched in boost converter section ofcompany website but I couldn't find another converter. Please let me know if you need further information. Best regards, Pablo + +Pablo, i need times to check the connection of the FB pin. however, this device is not 1MHz. what about the TPS61253A with 3.8MHz if the BGA package is acceptable. anti-ring is not used in force PWM condition. + +Hi Jasper, Thank you for your advice. I think TPS61253A is a good choice for my project. Best regards, Pablo + diff --git a/data/text/DLP4/900199 b/data/text/DLP4/900199 new file mode 100644 index 0000000000000000000000000000000000000000..980d897189ea5cb3505da705e4b39ed1623b0bd6 --- /dev/null +++ b/data/text/DLP4/900199 @@ -0,0 +1,8 @@ +PGA411-Q1: angle register + +Part Number: PGA411-Q1 Hi, I used PGA411-EVM to read DEV_STAT5. I found ORDANGLE bits can only display 0 to 0x3FF, how can GUI display the 0degree to 360degree? Using Equation 11 in datasheet, I can only get 0degree to 90degree. thanks. + +Dear user1387741 - I don't work on this part, but i was curious about your question - it looks to me like if you are getting max 0x3FF from this register (bits 0-9 are 1b), you are/must be in 10bit mode and equation 10 applies, which would give you 359.6484 degrees you would need to be in 12 bit mode to get 0x7FF from this register, then apply equation 11, when in that mode, to get same Check the BMODE0 pin status, if low, then you are in 10-bit mode, if high, then you are in 12 bit mode and someone from this product group will correct me. + +Hi Josh, Thank you , you are right！ It's OK now. + diff --git a/data/text/DLP4/900200 b/data/text/DLP4/900200 new file mode 100644 index 0000000000000000000000000000000000000000..b11c4fb282de6f6cbb13128afb5aa33e8c11e265 --- /dev/null +++ b/data/text/DLP4/900200 @@ -0,0 +1,6 @@ +TPS40211-Q1: TPS4021x-Q1 Datasheet Error? + +Part Number: TPS40211-Q1 Hello, I'm designing a boost converter similar to the one described in Typical Application 8.2 on page 26 of the datasheet for the TPS40210. I was going through the calculations and am having trouble with Equation 59. When I put this into MATLAB with the typical application numbers, I get 0.2087. I checked with a colleague and he also gets this. Can you verify that this calculation is correct? /lit/ds/symlink/tps40211-q1.pdf?ts=1587768910081 Thanks! + +Hi Jason, Thanks for using the TPS40210. The equation is correct based on the model that output impedance looks like a current source flowing into the output impedance (Rout) in parallel with output capacitor in series with its equivalent resistance (Cout+R_esr). Output impedance looks like [(R_esr+1/(s*C_out)]||R_out]. I think in this design, this could be thought of a scaling factor or through experimental results. Ideally, you would get the value around 0.2 through the equation above, but empirical results will give another value. The equations given here can be thought of as a guideline based on some approximation/model, but will need tweaking or testing in order to produce optimal results. Thanks, Richard + diff --git a/data/text/DLP4/900203 b/data/text/DLP4/900203 new file mode 100644 index 0000000000000000000000000000000000000000..5d6aa3c13677ea8c4860bc511cb92ec27dab4a75 --- /dev/null +++ b/data/text/DLP4/900203 @@ -0,0 +1,6 @@ +TPS786: TPS78601KTTRG3 + +Part Number: TPS786 I have a basic doubt. Suppose I am using TPS78601KTTRG3 to generate an output of 3.3 V and the voltage at input pin number 2 is connected to a battery of range 4.2 V (Max, when full charge) to 2.8 V (Min). Also 3.3 V is connected to many active ICs whose total current will be 435 mA. My doubt to you is that will the input current (current through pin number 2) be always greater than output current,i.e., 435 mA), when the battery discharges slowly from 4.2 V to 2.8 V. Also note that my EN pin is connected to IN pin. So how much will be the EN current be, when the battery discharges slowly from 4.2 V to 2.8 V. TPS78601KTTRG3 + +Hi Ameet, The UVLO for TPS786 has a maximum value of 2.65V, which means for your Vin at 2.8V, the LDO is on and in dropout. During dropout, the pass-FET switch of the LDO will be on to allow current flowing from Vin to the Vout. You will have some current flowing from Vin to Ground at the same time, so the input current will be higher than your load current during the process that the battery voltage drops from 4.2V to 2.8V. For voltage higher than 1.7V, the EN signal will turn on the part, so the EN will not affect the LDO running in dropout when the input voltage drops to the point it's no longer in regulation. Regards, Jason Song + diff --git a/data/text/DLP4/900204 b/data/text/DLP4/900204 new file mode 100644 index 0000000000000000000000000000000000000000..adc1a8f2547f8ab663d8f843f48ad57b5267ddcc --- /dev/null +++ b/data/text/DLP4/900204 @@ -0,0 +1,6 @@ +TPS756: TPS75633KTTT + +Part Number: TPS756 I have a basic doubt. Suppose I am using TPS75633KTTT to generate an output of 3.3 V and the voltage at input pin number 2 is connected to a battery of range 4.2 V (Max, when full charge) to 2.8 V (Min). Also 3.3 V is connected to many active ICs whose total current will be 1.173 A. My doubt to you is that will the input current (current through pin number 2) be always greater than output current,i.e., 1.173 A), when the battery discharges slowly from 4.2 V to 2.8 V. Also note that my EN pin is connected to IN pin. So how much will be the EN current be, when the battery discharges slowly from 4.2 V to 2.8 V. + +Hi Ameet, The UVLO for TPS756 has a maximum value of 2.75V, which means for your Vin at 2.8V, the LDO is on and in dropout. During dropout, the pass-FET switch of the LDO will be on to allow current flowing from Vin to the Vout. You will have some current flowing from Vin to Ground at the same time, so the input current will be higher than your load current during the process that the battery voltage drops from 4.2V to 2.8V. For voltage higher than 2V, the EN signal will turn on the part, so the EN will not affect the LDO running in dropout when the input voltage drops to the point it's no longer in regulation. Regards, Jason Song + diff --git a/data/text/DLP4/900212 b/data/text/DLP4/900212 new file mode 100644 index 0000000000000000000000000000000000000000..cd5570cac2cc60bf9795cd0480d07b97d4b74677 --- /dev/null +++ b/data/text/DLP4/900212 @@ -0,0 +1,24 @@ +LP8553: LP8553: Issues with Low Input Voltage application + +Part Number: LP8553 I have my circuit connected in the same way as the Typical Application for Low Input Voltage on Page 2 of the datasheet as I am using 5V input on Vbatt, Vin, Vldo. I have a 160Hz PWM input to the PWM input pin. However, I am seeing an UVLO fault in register 02h as bit 0 is set to 1. I have not changed any default settings. The output voltage shows 10.1V, current is at about 140mA (shown from power supply), but there is no output PWM through the LED string. Are there any settings I have to set in the EEPROM or other registers to get the low input voltage application to function? Any ideas as to why the LEDs aren't turned on? + +Hi Brandon, For the VLDO, you need to connect a cap to ground, but you have connected to the "Vin" this LDO is internal output, please modify the schematic and try again. BR Sean + +In the datasheet in shows connecting the VLDO to Vin as I have in my schematic. Since VBATT is 5V in my schematic, I connected VLDO & VIN together to VBATT. + +Hi Sir, Yes, that is ok, but you can try with a higher input voltage source and check the fault regs since you have a UVLO fault now, And when you try with higher supply voltage, please don't connect the “VLDO" pin to Vin. BR Sean + +Okay so essentially you're asking me to connect the chip in the same way as shown here? + +Also, do I need to connect a 5V source to VLDO (with a cap to ground)? + +Hi Sir, Yes, please try with a higher input voltage, and since the supply voltage will exceed 5V, so don't connect the "VLDO" to the "Vin" and just connect a cap between "VLDO" and ground. BR Sean + +Why does the data sheet show 5V on the VLDO pin? Does that indicate that the VLDO pin outputs 5V? + +Yes, you are correct, this is an internal LDO which output 5V for internal power supply. BR Sean + +Hi, I am still in process of having my boards modded to try and separate VLDO and VIN. However, this would still not solve my problem in that I only have 5V available to power this driver. Would there be any other reasons my schematic could have issues? + +Hi Brandon, Since the problem is UVLO, you need to increase the power supply voltage or you need to decrease the LED counts or decrease the output current. BR Sean + diff --git a/data/text/DLP4/900213 b/data/text/DLP4/900213 new file mode 100644 index 0000000000000000000000000000000000000000..1e55bbefe5cd70722926c2574186a66d49d1bd49 --- /dev/null +++ b/data/text/DLP4/900213 @@ -0,0 +1,20 @@ +TPS549B22: Reference Voltage Programming + +Part Number: TPS549B22 Hi, I need to program the TPS549B22's reference voltage to 0.75000V using the PMBUS (USB Interface Adapter) and the Fusion Digital Power Designer software. I cannot find the reference voltage selection on the software. Thanks + +Hi Andrei, For the TPS549B22, the VOUT_COMMAND command should be used to program the reference voltage. This has a max of 1.2V, like when configuring with VSEL, so an external resistor divider is required for higher output voltages. Let me know if you have any further questions. Anthony + +Hi Anthony, I am using the TPS549B22EVM development board. I swapped out the sensing resistors on the board with a 10kOhm and 15kOhm resistor and set the reference voltage (VOUT_COMMAND) to 0.75000V. According to the datasheet, this should output 1.25V. Unfortunately, the output voltage is identical to the reference voltage (VOUT_COMMAND). Here is my understanding of the RSP/RSN Remote Sensing Functionality: The TPS549B22 uses TI's D-CAP3 control mode, which is a variation of Constant On-Time (COT) control. The TPS549B22 will adjust its operating frequency to attempt to regulate the voltage between the Remote Sense Positive pin (RSP) and the Remote Sense Negative pin (RSN) to be equal to the internal reference voltage (which is set through an external voltage divider connected to the VSEL pin of the TPS549B22). See Figure 30. The resistor ratio is R1 / R2 = (Vout/Vref - 1) where R1 is the resistor from VOSNS to RSP and R2 is the resistor from RSP to RSN. Using Table 2 (Page 20) of the TPS549B22 datasheet, I set the reference voltage (VOUT_COMMAND) to 0.75000V and physically swapped out the resistors to output 1.25V. With a reference voltage of 0.75000V, R1 = 10kOhm and R2 = 15kOhm. Thank you for your help. + +Andrei Marinescu The TPS549B22EVM-847 Users Guide contains details of using the FUSION GUI with the TPS549B22 and the TP549B22EVM-847 evaluation board. /lit/ug/sluubn2/sluubn2.pdf#page=22 Figure 24 on page 23 shows the "All Config" tab of the Configuration page. First, select "Configuration on the lower left of the screen" The Reference voltage is programmed through PMBus via the VOUT_COMMAND. Since the TPS549B22 does not support the command VOUT_SCALE_LOOP, the user will need to program the desired reference voltage into the VOUT_COMMAND value. Note: The VSEL pin-strapping will override the VOUT_COMMAND value stored in NVM by the STORE_DEFAULT_ALL command unless one of the 4 0.975V options are selected. I would recommend using either the "OPEN" (pin pulled to BP) or SHORT (Pin shorted to ground) options, depending on the fault response option desired, Hiccup or Latch-Off. See Datasheet page 20 /lit/ds/symlink/tps549b22.pdf#page=20 for more details. + +Andrei Marinescu If you attempted to change the resistor divider to VOSNS to RSP = 10k Ohms and RSP to RSN = 15k Ohms, and the output voltage is directly tracking the reference voltage of 0.75V instead of 1.25V, either the RSP to RSN connection is open, or the VOSNS to RSP resistor is shorted. The schematic is on page 6 /lit/ug/sluubn2/sluubn2.pdf#page=6 Change R10 to 15kOhms and R8 to 10kOhms. I know it's a little complicated in there with the extra components to allow for D-CAP mode with RCC injection, so double check the resistor placement. + +Andrei Marinescu Here is the location of R15 and R8 on the PCB: + +Hi Peter, I replaced R8 with a 10kOhm resistor and R15 with a 15kOhm resistor. I also desoldered R23 and left the circuit OPEN as shown in Table 2. I set VOUT_COMMAND to 0.75000V, but the development board is still outputting the same voltage as VOUT_COMMAND. The only thing I am unsure about is the resistance across R15. When I check the resistance of R15 it reads between 6-12kOhm even though it is a 15kOhm resistor. Is this my problem? Thanks for your help. + +Andrei Marinescu Measuring the resistance of R8 or R15 in circuit is going to be problematic because there is enough capacitance in Cout to look like a short circuit to many Ohm-meters, so you're likely to measure R8 and R18 in parallel when you measurement them in-circuit. If the output voltage you are measuring is equal to VOUT_COMMAND, then it is likely that one of the resistors is not corrected correctly. Turn the output on, measure VOUT with your volt meter, then measure the voltage across R15 and the voltage across R8. If the divider is set-up correctly the voltage drop across R15 should be equal to the VOUT_COMMAND value and the voltage drop across R8 should be equal to 2/3 of that (R8 / R15 = 10/15 = 2/3). If the voltage drop across R8 is near 0V, then check to see if the pads for C31, C32, or C36 are shorted out and let me know what the results are. + +When I try to measure the voltage across these resistors, the output goes to 0V. Once the power supply is 0V, it does not return to the 0.75000V until I power the board off and on again. + diff --git a/data/text/DLP4/900216 b/data/text/DLP4/900216 new file mode 100644 index 0000000000000000000000000000000000000000..df6c38369f006548e0924c360d72ef6be6e1320a --- /dev/null +++ b/data/text/DLP4/900216 @@ -0,0 +1,6 @@ +Lost of 3D sync using DLP-Link on a laser projector + +I'm having problems locking to a 3D movie image with active 3D glasses (XPAND & Ultra-clear DLP glasses) and a blue laser projector using RGBY wheel. I tried to find help info on DLP-Link, but find that this mode is proprietary with TI. Projector produces correct double image (left & right eye mixed) on screen, but glasses drift in sync about every 4-5 minutes. I'm wondering about the DLP white flash might be from the "Y" part of the wheel and there may need to be a color filter over the sensor in the glasses. illumination from the projector is between 3500 to 4000 lumens onto a 8 foot wide screen in 1920x1080 resolution. Previous projector before the upgrade to a laser model worked fine in 3D with a RGBCMY wheel, but was only 1200 to 1800 lumens. Any ideas to solve this problem? Please advise. + +I am not aware of any particular color sensitivity in any DLP® Link(TM) glasses. There isn't any reason that they should have a sensitivity to yellow. DLP Link is not color dependent. DLP Link pulses are typically red or blue, although they can be any color. I would not expect yellow to be a problem. If you want to know more about how it works, please see this post; there is a reference there to details on DLP link. /support/dlp/f/94/t/663116 . Hopefully that is helpful. - Gary + diff --git a/data/text/DLP4/900218 b/data/text/DLP4/900218 new file mode 100644 index 0000000000000000000000000000000000000000..dea3b4bf8426ca9b5e0b2e850f248122956ce5be --- /dev/null +++ b/data/text/DLP4/900218 @@ -0,0 +1,6 @@ +BQ28Z610: Unable to write MAC 0x004C Manufacturer Name + +Part Number: BQ28Z610 I am able to write to the Serial Number MAC (0x004E) successfully, but am unable to use the same procedure to write to the Manufacturer Name MAC (0x004C). Both regs are listed as R/W, available unsealed, the device is unsealed however. Successful write to 0x004E: Advanced Comm Transaction Log RW Addr Reg Len Data Wr , aa , 3E , 02 , 4E 00 // Set address and read 36 bytes. Rd , aa , 3E , 36 , 4E 00 EA 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 C5 06 Wr , aa , 3E , 04 , 4E 00 EA 03 // Change the 2nd byte of the serial number to 0x03 and write it. Wr , aa , 60 , 02 , C4 06 // Write the checksum and length. Wr , aa , 3E , 02 , 4E 00 // Read back 36 bytes and see the 2nd SNum byte has changed to 0x03. Rd , aa , 3E , 36 , 4E 00 EA 03 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 C4 06 Unsuccessful write to 0x004C: Advanced Comm Transaction Log RW Addr Reg Len Data Wr , aa , 3E , 02 , 4C 00 // Set address and read 36 bytes. Rd , aa , 3E , 36 , 4C 00 42 30 31 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 10 07 Wr , aa , 3E , 05 , 4C 00 42 32 31 // Change the 2nd byte of the MFG Name to 0x32 and write it. Wr , aa , 60 , 02 , 0E 07 // Write the checksum and length. Wr , aa , 3E , 02 , 4C 00 // Read back 36 bytes and note the 2nd byte has remains at 0x30. Rd , aa , 3E , 36 , 4C 00 42 30 31 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 10 07 Is there something I am missing in the process with respect to writing string vs numeric data? I have tried 21 bytes with no success as well (field is S21). + +Hi John, Try to write to the Manufacturer Name in the data flash directly. The slides below how to update the data flash in detail. BQ28z610 Data Flash - Device Name.pdf Andy + diff --git a/data/text/DLP4/900225 b/data/text/DLP4/900225 new file mode 100644 index 0000000000000000000000000000000000000000..73b988179ae344f2570a40aa3a2da4b87ab987f0 --- /dev/null +++ b/data/text/DLP4/900225 @@ -0,0 +1,8 @@ +LMP91000: Glucose sensor + +Part Number: LMP91000 Hi, I am designing circuitry for a 2-electrode glucose sensor requiring bias voltage around 600mV with current typically between 2-10 nA. Measurements are conducted with DC amperometry. I am evaluating whether LMP91000 would be an appropriate choice for the potentiostat. On page 5 of the LMP91000 datasheet, "minimum operating current capability" ICE is listed as 750µA and further states "At such currents no accuracy of the output voltage can be expected". For some reason, I am having trouble understanding the meaning of this. Can you please clarify its significance and if it precludes the suitability of this AFE for my design? Thank you! + +Ahanu, When reading the data sheet be a little more through and read the description about how the device works. The statement "At such currents no accuracy of the output voltage can be expected" is a note attached to the charge current of 10mA. This means that when first charging your sensor the max current may reach 10mA. The charge bias voltage cannot be controlled if max charge current is reached. The bias voltage will be ramping as if it were in current mode. Once your sensor is charged (powered up) the current will drop below 10mA and the bias voltage will return to normal. The ICE can operate between –750 μA ≤ICE ≤ 750 μA. You should not have any problems with your sensor working on the LMP91000. + +Gordon, Thank you for that clarification. I had, in fact, misread the datasheet. Warm regards, -Ahanu + diff --git a/data/text/DLP4/900227 b/data/text/DLP4/900227 new file mode 100644 index 0000000000000000000000000000000000000000..75ec282df02037b94f0792f037f30c6b9b8a100e --- /dev/null +++ b/data/text/DLP4/900227 @@ -0,0 +1,8 @@ +CCS/BQ40Z60: lifetime RTL RTH unit + +Part Number: BQ40Z60 Tool/software: Code Composer Studio 1, STL and STH unit in sluuao4d is 2 hours. But in .gg file, STL and STH unit in dataflash lifetime section is h. Could you help check which one is right?5707.7_19_6_3 version.gg.csv Is STL and STH unit 2h or h? Thanks! + +Hello Emma, The native unit is 2h. I will check why the gg.csv file displays unit in h. + +Hello Emma, I was trying to figure out how your gg.csv file has h instead of 2h as the unit. Based on the FW version the unit should be also 2h. It's possible that the gg.csv file was edited. Please export a recent gg.csv yourself to confirm that the unit is 2h. + diff --git a/data/text/DLP4/900238 b/data/text/DLP4/900238 new file mode 100644 index 0000000000000000000000000000000000000000..2ed49cd80706741302f7430fdfe5e25d3b1d4bdc --- /dev/null +++ b/data/text/DLP4/900238 @@ -0,0 +1,10 @@ +CCS/DLP4710EVM-LC: How can I use JTAG to upload MSP430 code to DLP4710 EVM-LC + +Part Number: DLP4710EVM-LC Tool/software: Code Composer Studio Hi TI, I asked a question a while ago regarding Cypress chip on 4710 EVM-LC can not be detected by GUI and believed the MSP430 code might be corrupted. I bought a JTAG fromcompany and have searched a guide to upload the code using JTAG but could not found a clear clue. Could anyone help me or point me a link? Thanks! Derlin + +Hi Derlin, You need to install the Code composer studio for building the MSP430 SW code. MSP430 SW is available at evm home page : /tool/DLP4710EVM-LC You can connect MSP430 JTAG programmer to EVM and using code composer tool you can build and download the firmware. Thanks, Navneet If a post answers your question, please click the "Verify Answer" button. + +Hi Navneet, I already have CCS 8.7 and DLP4710 MSP430 code (PICO-FLA7-PAD3005-TI-EVM-Modify-Devasys) in my computer. But I heard I need to setup JTAG while installing CCS. Is that true? I don't have JTAG experience. Thanks! Derlin + +Hi Derlin, You need not to have the JTAG at the time of installation. You can connect the JTAG now with your PC and EVM. Open code composer studio -> import the project in code composer studio from the MSP430 code -> build -> run. Let me know if you see any issue. Thanks, Navneet If a post answers your question, please click the "Verify Answer" button. + diff --git a/data/text/DLP4/900250 b/data/text/DLP4/900250 new file mode 100644 index 0000000000000000000000000000000000000000..84c61af1b2359c88a5c45324cd068471a6deb83b --- /dev/null +++ b/data/text/DLP4/900250 @@ -0,0 +1,8 @@ +BQ40Z50-R2: sleep mode to normal mode configure + +Part Number: BQ40Z50-R2 Hello Sir If bq40z50 is configure as "CHG off DSG on no SBS communication" during our device's shipping mode to save power. How to change gauge status to normal mode? Need our SW to configure that or plug in AC source can recover to normal mode automatic? Yihung + +Yihung, Unfortunately, to achieve the low power mode the processor and SMBus engine is shutdown. It requires a voltage on PACK pin in order to exit shutdown. You can trying using a switch with current limiting resistor to apply BAT voltage to PACK. + +Damian 1. If gauge is in shutdown mode, need apply a battery voltage in PACK pin to wakeup gaue, I think this is what you tell me. 2. For my question, If gauge is in sleep mode, "CHG off DSG on" since DSG is on, there should be a battery votlage on PACK pin already, right? In this case, how to configure gauge back to normal mode? 3. In your gauge IC spec, in sleep mode "CHG off DSG off" gauge IC still consume 52uA, does this means your processor engine is still alive and consume 52uA? Yihung + diff --git a/data/text/DLP4/900254 b/data/text/DLP4/900254 new file mode 100644 index 0000000000000000000000000000000000000000..39cea7053b94fea23e3d65f40c7c25efff7f759b --- /dev/null +++ b/data/text/DLP4/900254 @@ -0,0 +1,6 @@ +TPS61256A: OVP function + +Part Number: TPS61256A Hi Team, Just want to check if TPS61256A has the OVP function. Thanks. BRs Given + +Hi Given, TPS61256A doesn't have OVP function. + diff --git a/data/text/DLP4/900258 b/data/text/DLP4/900258 new file mode 100644 index 0000000000000000000000000000000000000000..0c242cc5e0a7553f04be52a7b81c757d828a95e0 --- /dev/null +++ b/data/text/DLP4/900258 @@ -0,0 +1,8 @@ +TPS53819A: How does OCP TPS53819A work + +Part Number: TPS53819A Hi team, I have a question about the OCP functionality. The DS says " TPS53819A has cycle-by-cycle overcurrent limiting control. The inductor current is monitored during the OFF state." My question is that how the device decides that OCP should be triggered? Or say what's the exact time that the inductor current is monitored? One idea is that, the device will monitor the inductor current during the whole OFF period, the OCP will be triggered only if inductor current of the whole OFF period is larger than OCP trip level. Another idea is the device will monitor the inductor current during the whole OFF period, but the OCP will be triggered only needs the vally point of inductor current is larger than OCP trip level. thanks a lot. Yang + +Yang Wu The TPS53819A uses a cycle by cycle, Off-time, valley current limit mechanism that limits the inductor current and places the converter into a constant output current mode until the load current decreases or the output voltage drops sufficiently to trigger the output under voltage protection fault. After an On-time completes, the highside FET turns off and the low-side FET turns on, there are 3 signals gating the start of a new On-time. When all 3 conditions are met, a new on-time starts. 1) Minimum Off-time of 320ns (typ). This ensures enough time for the On-time energy to be reflected on the output voltage and for the current sense on the low-side FET to stabilize. 2) Current Limit programmed by the TRIP pin. The voltage on the SW pin during the on-time is compared to a scaled version of the voltage on the TRIP pin to set the current limit. If the negative voltage on switch pin exceeds the current limit threshold, the Off-time will be extended until the inductor current drops below the current limit, limiting the inductor valley current during the off-time. 3) The Reference Voltage. This generates a new on-time when the output voltage is below the target output voltage as long as the minimum off-time has been met and the inductor current is less than the current limit. OCP is "triggered" when Conditions 1 and 3 are met, but Condition 2 is not because the inductor current is still above the Over Current Limit threshold when the reference attempts to trigger a new on-time. So, the current is actually sensed continuously during the low-side FET on-time, but it only affects operation when the inductor current exceeds the current-limit when a new on-time would be created. By extending the off-time to limit the inductor current, the duty cycle is increased, reducing the output voltage until it triggers under-voltage protection. This ensures a smooth transition from D-CAP regulation to pulse by pulse valley current limit while limiting the inductor current to protect against saturation and allowing the output capacitors to help ride through a momentary over-current condition, such as exceeding the current limit during a load-step recovery response. + +Hi Peter, Thanks for your detailed reply, it's very clear. One more thing, in the (2) condition, it says "The voltage on the SW pin during the on-time is compared to a scaled version of the voltage on the TRIP pin to set the current limit". Do you mean the low-side FET on time? In my opinion, it looks like low-side on-time since it says "If the negative voltage on switch....". Thanks a lot. Best regards, Yang + diff --git a/data/text/DLP4/900266 b/data/text/DLP4/900266 new file mode 100644 index 0000000000000000000000000000000000000000..8ee7151d62eb7096b8381369c88d181537415fac --- /dev/null +++ b/data/text/DLP4/900266 @@ -0,0 +1,6 @@ +UCC27524A: Question for ucc27524a input to output propagation delay specification + +Part Number: UCC27524A Hi Experts, Our customer is curious about the input to output propagation delay specification for UCC27524A. In our datasheet, we stated that the min is 6ns, max is 23ns. If we look into the datasheet Figure 2, you will see we define the tD1 from input 90% High Level to output 10% High Level. So customer's questions are: 1. Can we explain it a little bit more details about the input to output propagation delay for this device? What's the major factor for this delay? 2. Is the tD1 equal to tD2 typically? In customer's real test, the tD1 is much longer than tD2, what's the influence in here? 3. What's the consideration for the tD1 and tD2 definition with input 90% High Level and output 10% High Level? As our understanding, it could be input 90% High Level and output 90% High Level. + +Hi, Jackie, I will follow up with you via email. Please mark this thread as Resplved by pressing the Green button. + diff --git a/data/text/DLP4/900271 b/data/text/DLP4/900271 new file mode 100644 index 0000000000000000000000000000000000000000..7c291b4819c18946790098fb1213c01134bbe0c4 --- /dev/null +++ b/data/text/DLP4/900271 @@ -0,0 +1,6 @@ +TMP411: Sensors forum + +Part Number: TMP411 Hello, I want to measure the temperature of some mosfets mounted on a heat sink as accurate as possible. I would send the Temperature to MCU, my Question ist: If I used the Tmp411 with pnp Transistor, I want to connect the ground of Mosfet with the Collector of the pnp transistor so it could have a better heat transfer. But in the datasheet, Figure 11 shows the use of arrow symbol on the Collector of the pnp transistor which is in the Figure is different from ground and is not shown as it is connected to ground of the Chip. So can I make this connection from Collector of PNP to ground? If its not possible, is there another solution to measure the temperature of Mosfet but with a direct connection to the heatsink. I thought it would be better to use a transistor with TO-220 Package so I would mount it directly on the heat sink but in the datasheet it recommends MMBT3906LP so I don't know which transistor would be the best to use with TO-220! Please help and thanks in Advance. + +Hi, Connecting the collector of the PNP to ground should be okay as long as there is little ground noise. For BJT recommendations please see the below FAQ post. /support/sensors/f/1023/t/892887?-FAQ-Remote-Temperature-Sensors-What-remote-BJT-Thermal-diode-should-I-use- Thanks, David + diff --git a/data/text/DLP4/900272 b/data/text/DLP4/900272 new file mode 100644 index 0000000000000000000000000000000000000000..474c374c292f15ddf9200b7ad56afb62a09b80dc --- /dev/null +++ b/data/text/DLP4/900272 @@ -0,0 +1,8 @@ +Negative supply generation + +Hii I have a requirment of negative supply voltage generating from input -15V to output -6V or -7.5V,1.5A or 2A for one of my application. I cannot use LDO since losses will be high can u suggest any switcher IC for the same. Regards + +Hi Sneha, You need a boost regulator for -15V to -6V conversion. I will forward your inquiry to other production line. B R Andy + +Dear Sir, Please refer to SLVA985 and PMP9624 for a referecne. For the SLVA985, you just need to change TPS61088-Q to TPS61175 or TPS61178. + diff --git a/data/text/DLP4/900278 b/data/text/DLP4/900278 new file mode 100644 index 0000000000000000000000000000000000000000..c051586709b7eba9aa548ab48c22f91c27e60604 --- /dev/null +++ b/data/text/DLP4/900278 @@ -0,0 +1,44 @@ +BQ79616-Q1: problem with auto addressing + +Part Number: BQ79616-Q1 Hi, I am having problems with auto addressing a 616 with a bq79600 bridge. The data sheets of the 600 and the 616 do not agree how this is done but I tried both methods (and hundreds others) without success. To simplify things at the moment I have a 600 followed by a single 616. Below is a software trace of the messages sent and received. The reading back of the addresses after the auto addressing sequence (the 616 data sheet version shown) fails, neither the 600 nor the 616 is responding. reading register 0x2001 from the 600 works though (bottom). bq79616.c frm_snd(sng wri, adr 0, reg 0x0309, len 1) 0x90 0x00 0x03 0x09 0x20 0x13 0x95 +bq79616.c ret 7 bytes sent +bq79616.c frm_snd(brc wri, adr 0, reg 0x034c, len 1) 0xd0 0x03 0x4c 0x00 0xfc 0x24 +bq79616.c ret 6 bytes sent +bq79616.c frm_snd(brc wri, adr 0, reg 0x0309, len 1) 0xd0 0x03 0x09 0x01 0x0f 0x74 +bq79616.c ret 6 bytes sent +bq79616.c frm_snd(brc wri, adr 0, reg 0x0306, len 1) 0xd0 0x03 0x06 0x00 0xcb 0x44 +bq79616.c ret 6 bytes sent +bq79616.c frm_snd(brc wri, adr 0, reg 0x0306, len 1) 0xd0 0x03 0x06 0x01 0x0a 0x84 +bq79616.c ret 6 bytes sent +bq79616.c frm_snd(brc wri, adr 0, reg 0x0308, len 1) 0xd0 0x03 0x08 0x02 0x4e 0xe5 +bq79616.c ret 6 bytes sent +bq79616.c frm_snd(sng wri, adr 0, reg 0x0308, len 1) 0x90 0x00 0x03 0x08 0x00 0x13 0xdd +bq79616.c ret 7 bytes sent +bq79616.c frm_snd(sng wri, adr 1, reg 0x0308, len 1) 0x90 0x01 0x03 0x08 0x03 0x52 0x20 +bq79616.c ret 7 bytes sent +bq79616.c reg_rea(brc rea, adr 0, reg 0x034c, len 0) +bq79616.c ret 0 bytes received +bq79616.c frm_snd(sng rea, adr 0, reg 0x0306, len 1) 0x80 0x00 0x03 0x06 0x00 0xd6 0x7e +bq79616.c ret 7 bytes sent +bq79616.c reg_rea(sng rea, adr 0, reg 0x0306, len 1) +bq79616.c ret 0 bytes received +bq79616.c address 0 read 0 response 0xff +bq79616.c frm_snd(sng rea, adr 1, reg 0x0306, len 1) 0x80 0x01 0x03 0x06 0x00 0xd7 0x82 +bq79616.c ret 7 bytes sent +bq79616.c reg_rea(sng rea, adr 1, reg 0x0306, len 1) +bq79616.c ret 0 bytes received +bq79616.c address 1 read 0 response 0xff +bq79616.c frm_snd(sng rea, adr 0, reg 0x2001, len 1) 0x80 0x00 0x20 0x01 0x00 0x25 0x84 +bq79616.c ret 7 bytes sent +bq79616.c reg_rea(sng rea, adr 0, reg 0x2001, len 1) 0x00 0x00 0x20 0x01 0x14 0x24 0x55 +bq79616.c ret 7 bytes received +bq79616.c rea: 7 +bq79616.c frm: 0x00 0x00 0x20 0x01 0x14 0x24 0x55 + What have I missed? Regards, Hagen . + +Hi Hagen, These parts are under NDA so we need to support this in private chat or email instead of E2E forum, the short answer is we provide sample code/guide and GUI after NDA is setup to reference. Can you identify and contact thecompany contact used to get the parts? Regards, Taylor + +Hi Taylor, how can I send you an email? Regards, Hagen . + +Hagen, Please provide your email, and I will contact you. Kindly resolve this thread afterwards. Thanks, Taylor + diff --git a/data/text/DLP4/900280 b/data/text/DLP4/900280 new file mode 100644 index 0000000000000000000000000000000000000000..924b8caaa120c685336b693b37949404a85049f2 --- /dev/null +++ b/data/text/DLP4/900280 @@ -0,0 +1,10 @@ +IWR6843: moving poeple stand there and the tracking lost + +Part Number: IWR6843 Hello, i tired industrial_toolbox_4_0_0, 2D people counting lab. when i stand there, the tracking is lost. any parameter i can change to keep tracking? thanks. + +Hi Ming, Are you using the customization guide that is in the 'docs' folder of the People Counting Lab? I've looped in an expert to provide more specific tuning information. Regards, AG + +Hi Ming Zhang, I recommend moving to the latest industrial toolbox version available, and using the "Sense and Direct: HVAC Control" demo for this purpose. Regards, Justin + +Hi, Justin, i will try Sense and Direct: HVAC Control. its guide said up to 8 peoples, any issues for more than 8 peoples? thanks. + diff --git a/data/text/DLP4/900283 b/data/text/DLP4/900283 new file mode 100644 index 0000000000000000000000000000000000000000..af414b4423e07de9615e2f58690044735929ba5b --- /dev/null +++ b/data/text/DLP4/900283 @@ -0,0 +1,8 @@ +TPS63020-Q1: Some questions about using TPS63020 as a TEC driver + +Part Number: TPS63020-Q1 I use TPS63020 as a TEC drvier。 I use the Equations in the article SLVA677 to calculate the value of the R1，R2 and R3 。 I want to understand the relationship between the TEC current and the frequency, amplitude and duty cycle of the Vcrtl. + +Hi user6222316, Thanks for reaching out. First you need to see how Vctrl changes the output voltage. You can find this in several application notes, for example: /blogs_/b/powerhouse/archive/2020/02/18/adjusting-vout-in-usb-type-c-and-wireless-charging-applications-part-2 /lit/an/slyt777/slyt777.pdf The TEC current is then simply (Vin-Vout)/Rtec. Best regards, Milos + +thanks，:-) + diff --git a/data/text/DLP4/900285 b/data/text/DLP4/900285 new file mode 100644 index 0000000000000000000000000000000000000000..6e1e6fe2d48f2bba262cf655833be0b438120a9b --- /dev/null +++ b/data/text/DLP4/900285 @@ -0,0 +1,6 @@ +Design Equations used incompany Power stage designer + +Hicompany Experts, I have seen a Power stage designer tool fromcompany in which all topologies can be simulated easily. Can anybody provide me the design equations used incompany Power stage designer at a one place. I mean design equation for turns ratio calculation, Inductor , RMS Mosfet and diode current etc.....for all topologies in a single place. Regards Aneesh + +Hi Aneesh, The equations for power stage designer are documented here:/seclit/ug/slyu036/slyu036.pdf?ts=1587944240013 Best Regards, Ben Lough + diff --git a/data/text/DLP4/900286 b/data/text/DLP4/900286 new file mode 100644 index 0000000000000000000000000000000000000000..5219619672e36abae6e7d75fc874186057d376d7 --- /dev/null +++ b/data/text/DLP4/900286 @@ -0,0 +1,8 @@ +PGU lumens budget calculator for AR-HUD + +Where could I find the PGU lumens budget calculator for AR-HUD? Need this calculator to do the conceptual design for our customer application in Automotive business based on DLP technology. What is the maximum resolution that can be supported bycompany DLP DMD device? + +Hello User, Welcome to the DLP section of the TI-E2E community. I have forwarded your question to the team most familiar with your type of application. Fizix + +Hello, The AR HUD Lumen Budget Estimation Calculator can be found at the link below. /tool/DLP-HUD-LUMEN-CALC There are two automotive qualified DMDs for AR-HUD applications. The DLP3030-Q1 offers an output resolution of 864x480. The DLP5530-Q1 offers and output resolution of 1152x576. Best Regards, Jackson + diff --git a/data/text/DLP4/900287 b/data/text/DLP4/900287 new file mode 100644 index 0000000000000000000000000000000000000000..494f0850b011ad210914a9da8356da2e56172d9d --- /dev/null +++ b/data/text/DLP4/900287 @@ -0,0 +1,8 @@ +BQ25890H: bq25890H bqStudio Software + +Part Number: BQ25890H Hi Experts, Our customer wants to evaluate the bq25890H charger, but we can not find the bqStudio software for this device. We have already downloaded the latest BatteryManagementStudio software, but can not find it. Where we can get it? Thanks. + +Hi, Please use BQ25890 instead. It is similar. Please visit for BQ25890H TIDA design. Thanks, Ning. + +Hi Ning, The bq25890H has the different registers compared with bq25890, especially for the DP/DM DAC control, and customer needs them to simulate the QC3.0 protocol. I'm not sure how to control it if we have no PC software for bq25890H, can you help to double check it again? Also, can you help to check if we have the Linux drivers for bq25890H for QC3.0 simulation through DP/DM DAC control? Thanks a lot! + diff --git a/data/text/DLP4/900291 b/data/text/DLP4/900291 new file mode 100644 index 0000000000000000000000000000000000000000..24aa4adc20c09996cd87cbc2c31c36e561adc392 --- /dev/null +++ b/data/text/DLP4/900291 @@ -0,0 +1,6 @@ +TPS56637: Design questions by customer + +Part Number: TPS56637 Hello, I have a customer asking the following: In my new design I use DC/DC (12V to 1V/6A) TPS56637RPAR. According to Datasheet and Evaluation Board Guideline The AGND should be designed separated from PGND and connected at one point. Are this must or as a option? What purpose of this recommendation? Is this recommendation could be to my detriment when used 8 layers PCB and many high speed ICs? Thermal problems? Report_12V_to_1V_5A.pdf Thanks in advance + +Hi, it is not a must, but doing this is just helpful to provide a clean reference ground for quiet analog signal.so it is recommended, not related to thermal performance. Yuchang + diff --git a/data/text/DLP4/900293 b/data/text/DLP4/900293 new file mode 100644 index 0000000000000000000000000000000000000000..b421f6454a2d5682237a82dd13eeba037741dc6b --- /dev/null +++ b/data/text/DLP4/900293 @@ -0,0 +1,6 @@ +INA233 input filter + +Hello, I'm planning to use INA233AIDGST in my application. According to Figure 1: Frequency response (attached below) from datasheet of INA233, we can see that bandwith of diff. amp. is around 300 Hz. I try to calculate input filter (suggested on page 15, figure 25) consist of two 10R resistor and 100n capacitors. It must be around 160 kHz. (fc=1/(2*pi*R*C)). With INA233 I would like to measure current and voltage at switcher regulator input and output with switching frequency 120k or 215kHz (I will decide later). I think that it is better to use filter capacitor with higher value. 470n will bring cut off frequency of around 39 kHz which sounds better (120k of switcher is 3 times higher). What do you think? You reccomend to use filter resistor no large than 10R - is this value connected to current flowing in to IN+/IN- input of INA? How is the frequency bandwith of INA233 (which is around 300 Hz) connected to cut off frequency of external filter? I can not imagine how much the filter with much higher cut off frequency helps here? Doest the INA260 consist of INA233 with 2mR resistor integrated in reality? Many thanks! + +Hey Dejan, We recommend the input resistors to be less or equal than 10-Ohm because of an imbalance in IB+ and IB- due to input differential impedance of around 10 kOhm. As described in section 7.4.4, the input filter/resistors are only really needed if there are load current transients that occurs at the device’s sampling frequency (500kHz +/-10%) or if there are fast common-mode voltage transients at the input pins. In the latter scenario, the input resistors help limit any input ESD conduction current. Yes, the INA260 is essentially an INA223, but with an integrated 2mOhm shunt resistor. Sincerely, Peter + diff --git a/data/text/DLP4/900310 b/data/text/DLP4/900310 new file mode 100644 index 0000000000000000000000000000000000000000..a6052f5a8305bca7414f39f80c9366284c1f9566 --- /dev/null +++ b/data/text/DLP4/900310 @@ -0,0 +1,16 @@ +TPS8804EVM: Question concerning TPS8804EVM AGND pin and its layout + +Part Number: TPS8804EVM Dearcompany team, Just got the lovely TPS8804EVM. Before doing the experiments, I have some question about the AGND pin and its layout . 1. Is AGND (pin 5) already internally connected to the DGND pin (pin32) and/or thermal pad and/or PGND pin (pin 17)? 2. Why in the layout of TPS8804EVM, AGND pin externally connects to nothing but only an isolated place. (see belowed) Why can't this pin connect externally to the thermal pad? Or do I make any mistake? 3. In the Datasheet, AGND (pin 5) is described as "Analog ground. Connect to ground plane." Does this statement contradict to the layout of EVM board? (I've measured that there is no significant resistance between this isolated AGND plane and other ground plane.) (Top side of the board) (Bottom side of the board) Looks like that at least the AGND Pin is internally connected to the thermal pad. And I am not sure about why the pin 4 is left in an isolated plane externally. Thanks for reading this post, and hope someone will answer my question. Zt. + +Hi, I have notified our expert regarding this topic. Please expect a response by 4/29/20. Thanks, Aaron + +Hi Zt., Thanks for your question. The AGND, DGND, PGND, and thermal pad are all isolated. The connection from all of these to a central ground reference needs to be done on the PCB. This assessment is accurate given the information you have. However, the PCB is 4-layer and an internal layer connects AGND to the GND plane and thermal pad. It is good to connect AGND directly to the thermal pad similar to the DGND connection. It is connected on the EVM (see #2). I understand how these layout diagrams can be confusing given that two of them are missing. I will look into updating the user guide with the internal layers. Let me know if you have any other questions. Best regards, Grant + +Thank you so much, Grant! I didn't know that it's a four layer board. That really answered my question. I am wondering if we can have the design file of TPS8804EVM, or at least the gerber files? In case we have more questions like this. Best regards, Zt + +Hi Zt, Here are some images of the inner layers. I can send you the Gerber files if needed but it will take a few days to get the files ready. Best regards, Grant + +Thank you so so much, Grant! Please send me gerber files, there is so much we can learn from your design! zhihtailiu@gmail.com Best Regards, Zt. + +Hi Zt, No problem at all. I will prepare the files and will let you know when they're ready. Please be patient as it can take a few days. Best regards, Grant + diff --git a/data/text/DLP4/900311 b/data/text/DLP4/900311 new file mode 100644 index 0000000000000000000000000000000000000000..a05470c3a361d153f81f2c68baae3b4b90cf598b --- /dev/null +++ b/data/text/DLP4/900311 @@ -0,0 +1,6 @@ +TPS784-Q1: TPS784-Q1 output voltage + +Part Number: TPS784-Q1 Hello, if i want to set Vout-=1.25V, how to decide the value of R1/R2 since R2 need to be samller than 80K? + +Hi Alex, You first pick your R2, and it needs to be smaller than 80K. You will then use Equation 2 and 3 on Page 14 to pick R1. Please let me know if you still have trouble getting the R1. Regards, Jason Song + diff --git a/data/text/DLP4/900313 b/data/text/DLP4/900313 new file mode 100644 index 0000000000000000000000000000000000000000..8a220468b014e71ba6445cc0ce1a0348b232c089 --- /dev/null +++ b/data/text/DLP4/900313 @@ -0,0 +1,6 @@ +LDC1614: LDC1614EVM GUI + +Part Number: LDC1614 Hello, Why installed the LDC1614EVM GUI, but when connected the EVM , the GUI appeared LDC1101 instead of LDC1614? Best regards Kailyn + +Hi Kailyn, The LDC1101 and LDC1614EVM GUIs are completely run on different version of software. The LDC1101 requires a labview installation where as the LDC1614 requires the sensing solution GUI. The GUI does not appear by itself unless the executable is clicked. Can you please make sure the Sensing Solution GUI is invoked when connecting to a LDC1614EVM ? Thanks. + diff --git a/data/text/DLP4/900314 b/data/text/DLP4/900314 new file mode 100644 index 0000000000000000000000000000000000000000..34a28a2953391394a716ba6f8bc220bc67bd85e7 --- /dev/null +++ b/data/text/DLP4/900314 @@ -0,0 +1,10 @@ +IWR6843ISK-ODS: IWR6843ISK-ODS + +Part Number: IWR6843ISK-ODS hello， i am developing on the IWR6843, and the 3DPeoplecountingDemo_ConfigurationDetails.pdf show that 68xxChirpParams_Classifierdemo.xlsx provides some information, but i can't find it. can you please send me the link. Thank you very much. + +Hi User, Can you clarify which version of the Industrial Toolbox you are using? Regards, AG + +hi, I'm using the mmwave_industrial_toolbox_4_2_1 and 68xx_3D_people_counting project. Best wishes. + +Hi, Aplogize, I guess the name is wrong - see the file 3DPeoplecountingDemo_ConfigurationDetails.pdf in the 3D People Counting Docs folder. Regards, Justin + diff --git a/data/text/DLP4/900322 b/data/text/DLP4/900322 new file mode 100644 index 0000000000000000000000000000000000000000..da24a1e801ee15924bda69dd783fe7567ce95bcb --- /dev/null +++ b/data/text/DLP4/900322 @@ -0,0 +1,8 @@ +UCD90124A: FAN_FAULT alarms GUI not working + +Part Number: UCD90124A I tried to have GPO which ANDED all 4 fans fault alarms. From the GUI Status: FAN_FAULT showed all 4 fans, and I checked all Enable boxes. When saved "write to Hardware", only FAN1 fault was saved, and the other 3 fans were not. I am using latest Fusion GUI. Any advice ? Thanks! + +Hi Hai, We will check and reply to you. Thanks Qian + +Hi Hai We had communicated this issue over email and will have it fixed in the next release. Regards Yihe + diff --git a/data/text/DLP4/900323 b/data/text/DLP4/900323 new file mode 100644 index 0000000000000000000000000000000000000000..4a089dcb43c563b8094e37dd786311dcdbc2d7c0 --- /dev/null +++ b/data/text/DLP4/900323 @@ -0,0 +1,10 @@ +TPS56637: OCP limit for 20V input and 5V output condition + +Part Number: TPS56637 Hi Expert, 1. Can below circuit continuously output 5V/6A(30W), when input is 20V? What will the thermal performance be with 5V/6A under nature cooling and typical layout condition? 2. What is the output current OCP limitation for below schematic? How to calculate and modify? 3. How will the converter respond when OCP happens? + +Hi, 1, it support this application, you can use webench to evaluate the thermal. 2, OCP is fixed value, can’t be changed, you can check page5 “current limitation” to get. 3, When hit OCP, current will be limited and then Vout will drop to hit UVP, then happen hiccups, you can check page15 datasheet for details. Yuchang + +Hi Expert, Thanks for the info, however I cannot find thermal performance(tested thermal image) anywhere, no matter in EVM user's guide, or in Webench. Please help check. + +Hi Shenhua, Just refer to the thermal picture below from EVM for reference: 19V-5V/6A,15mins, Ta=25degC: Tc = 78.5degC 24V-5V/6A, 15mins, Ta=25degC: Tc = 85.6degC Thanks very much. Bruce + diff --git a/data/text/DLP4/900324 b/data/text/DLP4/900324 new file mode 100644 index 0000000000000000000000000000000000000000..3100bb42694b5228d550138c86a3834d6a52402c --- /dev/null +++ b/data/text/DLP4/900324 @@ -0,0 +1,6 @@ +AWR1642BOOST: Access to the People Counting demo bin file + +Part Number: AWR1642BOOST Good afternoon, I'm using Linux and I have install the SDK mmwave_sdk_02_01_00_04-Linux-x86-Install and after install I haven't found the demo project for People Counting. Can you provide me the file or the procedure to obtain? Thanks Best Regards André Dias + +Hi Andre, The People Counting Lab has not been supported on AWR1642 in several months, you will need to find an older version of the mmWave Industrial Toolbox and download it. I believe any version prior to 3.6.2 will have a compatible version of the People Counting Lab. Moving forward we recommend People Counting on the IWR6843. For further queries on People Counting please open up a new thread and we can put you in touch with acompany Expert. Regards, AG + diff --git a/data/text/DLP4/900327 b/data/text/DLP4/900327 new file mode 100644 index 0000000000000000000000000000000000000000..9b2e04bf6701525b9e82f26e1ba63a9e6be4a01a --- /dev/null +++ b/data/text/DLP4/900327 @@ -0,0 +1,6 @@ +COVID-19? + +Do you have any technology which can be used with CCTV camera to detect COVID-19? + +Hello Manoj, I am not aware a DLP reference solution which can be used to detect COVID-19 in a CCTV camera. The DLP technology is used for spectral sensing. It can be used to detect a spectrum signature. However, signal strength and noise will be an issue in such large view (CCTV) application. Spectral analysis using DLP will be more suitable for handheld or desk top application i.e sample is closely placed against a detector. The DLP chip-set can be used to detect up to 2500 nm wavelength . /dlp-chip/advanced-light-control/near-infrared/overview.html regards, Vivek + diff --git a/data/text/DLP4/900334 b/data/text/DLP4/900334 new file mode 100644 index 0000000000000000000000000000000000000000..c7c37ed3565b0b8a9de85c7d478baffe2e7fb517 --- /dev/null +++ b/data/text/DLP4/900334 @@ -0,0 +1,14 @@ +WEBENCH® Tools/TPS92515HV-Q1: Designing a driver with EMI filtering for driving high current leds + +Part Number: TPS92515HV-Q1 Tool/software: WEBENCH® Design Tools Unfortunately, the Webench tool is not available for this part. I'm looking to use this part in a circuit with CISPR 25 Class 5 Noise filtering for driving 9 high power LEDs @ 2A the LED's Vf range: Forward Voltage VF min 2.3 | 3.0 | 3.0 | 3.0 V V VF max 3.6 | 3.9 | 3.9 | 3.9 V V total 31.5|34.2|34.2|34.2 V They're multi-die LEDs and I know I'll have to have 4 individual drivers and 2 designs they are tested with a 20ms pulse. I want to use an AVR (ATmega328P) to control the driver and blink the LEDs in different fashions I'm still a student and trying to make my mark in the industry with an amazing product. Thanks in advance! + +Hello, CISPR 25 level 5 is difficult to reach. Look at PMP15004. This design meets CISPR 25 level 3. I placed an enclosure around it, bypassed the input and output and reached CISPR 25 Class 5 with our internal testing. Your input voltage must be higher since the output voltage is much higher. If your design is run at 100% duty cycle it will be a difficult task. Also, what duty cycle are you pulsing at? What is your input voltage range? The more information the better we can help. Best Regards, + +The Voltage range is an Automotive 12Vdc so a range from Vmin ~11V up to Vmax~14Vdc I'm open to other IC suggestions I need min CISPR class 3 filtering but the higher the better. Each led needs 2A. so the theoretical options are: A) Drive them in series and have 2A @ 31.5v (R) / 34.2v (W,B,G) B) Drive them in parallel and have 18A @ 3.5v (R)/ 3.8 V (W,B,G) C) Drive them series parallel 3x3 and have 6A @ 10.2v (R)/11.4v (W,B,G) I'm learning more every day! recently turned my life around and am committed to this project! your time will never be wasted! Thanks again! + +Hello Tim, I would look at the TPS92691 or TPS92692 used as a boost converter for 31.5V or 34.2V at 2A. Probably the best route as long as the input voltage cannot go higher than the output. The LM3409 can be used at 6A as a buck converter though I don't see this as being a viable solution since the output can be higher voltage than the input. Also there are tolerances and temperature to take into account, the LED isn't a fixed voltage drop, it will go up at colder temperatures. The TPS92640/641 can be used at 18A as a buck converter, this design will be a bit more difficult since the currents are high. If it is automotive the TPS92640/641 is not automotive grade. Best Regards, + +I'm going to give the TPS92692 a shot! do you have any ready-made filtered circuits that I can use for now until I put together my own detailed one? Do I need/ would it be helpful to have a voltage regulator on in Vin to bring the 11v-14v to a stable 12vdc? + +Hello Tim, If you read through the datasheet you will see this part was intended to run from a car battery including cold crank. Pre-regulating at that level will not buy you anything except added complexity. The TPS92692 EVM has filtering to meet Class 3 CISPR 25, this is without an enclosure. Most likely you will need an enclosure to pass Class 5, especially at you power level. If you look at some of the TIDAs they have filters that can meet CISPR 25 Class 5 levels. Check TPS92682 for this. This part has SPI interface so it requires communication however, the power designs are boost, boost to battery which should yield similar EMI results. Note as the power level goes up the filtering for the fundamental frequency will also have to go up. Best Regards, + diff --git a/data/text/DLP4/900337 b/data/text/DLP4/900337 new file mode 100644 index 0000000000000000000000000000000000000000..31eb009e0d979840a541d45b9911f7cc1575903f --- /dev/null +++ b/data/text/DLP4/900337 @@ -0,0 +1,10 @@ +TPS3840: Need voltage supervisor to support 700mA. + +Part Number: TPS3840 Dear TI, I need to disable the TPS63070 when battery voltage VBAT drop below 2.9V. The board also powered by USB (when connected to USB and VBAT is disabled), and VUSB connected to EN to the TPS63070. When no USB the board powered by VBAT. Question is the board need 700mA, if TPS3840 Input pin connected to VBAT and RESET pin connected to VIN pin and EN pin of TPS63070, can TPS3840 handle 700mA of load. No to confuse, can TPS3840 handle 700mA passthru current from battery to load? Can you recommend other part if this part is not suitable. BRgds Manimaran + +Hi Manimaran, The TPS3840 cannot handle 700mA because it is not pass through device. I would recommend a supervisor like the TPS3840 to monitor the voltage for 2.9 UV and a load switch such as the TPS22919 that can pass through the current. A supervisor can control the EN switch on the TPS22919. + +Hi Marcoo, Thanks for this info, the load switch could be a solution for my application. But if you have a device similar to load switch but has two inputs and one output, the input each has enable pin or one enable pin control both inputs is great. For example the device need to be, when VBAT and VUSB is high, the single Enable if high VBAT will be the output and when Enable is low, VUSB is the output. Again the load will be 700mA. BRgds + +Then your device will be something like the TPS2121. I will connect you with the team for further support. + diff --git a/data/text/DLP4/900346 b/data/text/DLP4/900346 new file mode 100644 index 0000000000000000000000000000000000000000..42fd3f117919b2da5328734768a881fc1cd4f5c4 --- /dev/null +++ b/data/text/DLP4/900346 @@ -0,0 +1,10 @@ +BQ25155: TS pin accidentally left floating instead of GND when we don't plan to use it + +Part Number: BQ25155 Hi, in the latest revision of our product, we accidentally left TS pin floating and the battery management started to behave strangely. When no battery is inserted and we plug in USB to power up the VIN, the MR pin quickly goes up and then falls to the low, which means that the device won't boot because it is in the reset state. However, when we plug in the battery and USB, everything works as expected. All power rails all good no matter if the battery is inserted or not. The MR pin is weird only without the battery and we hadn't this trouble in the last revision where we had the TS pin grounded. I suppose that the TS pin needs to be grounded to be able to operate the BQ25155 without a battery. Could you please confirm this information? Best regards, Lukas + +Hello, The /MR pin is pulled up to VBAT and since the battery is absent, you'll see the capacitor on battery pin get charged and discharged. This will also be seen on /MR. The VDD and PMID pins should be powered when on VIN plugin only. + +Hi, > The /MR pin is pulled up to VBAT and since the battery is absent, you'll see the capacitor on battery pin get charged and discharged Yeah, this is the expected behavior we saw on our previous revisions. The /MR was oscillating between 1.5 and 4.2 V. But we have now new revision, where we forget to ground the TS pin, and when the battery is removed the /MR is permanently pulled low (not oscillating). Could you please confirm this could be caused by TS pin grounded? Thanks, Lukas + +Hello, Can you share your schematic? What is VDD and PMID voltage when you have only VIN present? If you can write to the registers, can you try disabling the TS function and see if the behavior changes? + diff --git a/data/text/DLP4/900347 b/data/text/DLP4/900347 new file mode 100644 index 0000000000000000000000000000000000000000..5dc0159c8bad637102513e020d21ba7e47355a0b --- /dev/null +++ b/data/text/DLP4/900347 @@ -0,0 +1,14 @@ +TPS7B69-Q1: TPS7B69 model + +Part Number: TPS7B69-Q1 I would also like the Tina spice macro model. I couldn't seem to do anything with the transient models listed. Steve + +Hey Steve, Have you tried importing the unencrypted PSPICE model into Tina? I know it's not the same level of polish but should be able to get the job done. ~ Aaron + +I brought the files in and tried to use as a macro, but there was no TSM file. I then tried to import from the folder but nothing happened. How do I use this SIM file? Also, I downloaded the complete library. Is there anyway to imprt the whole thing without unzipping each folder and installing separately. Thanks, Steve + +I just found where in brought in a LIB file, but I can't find a way to use it. Steve + +OOPS. I just remembered that you use a LIB to make a macro. Success! Thanks for jogging my memory Steve + +Hey Steve, Glad it worked. Let me know if you run into any other roadblocks. ~ Aaron + diff --git a/data/text/DLP4/900370 b/data/text/DLP4/900370 new file mode 100644 index 0000000000000000000000000000000000000000..2d36ad6471600acff3ef7d28ca1e6720ea7f9db0 --- /dev/null +++ b/data/text/DLP4/900370 @@ -0,0 +1,8 @@ +LM74: LM74 temperature sensor accuracy issue + +Part Number: LM74 Hi Team, My customer happened LM74 accuracy issue, they test LM74 at ambient 25 degree but LM74 output value is higher than sensor case and PCB (under sensor) 2.5 deg. customer working temperature range is (-10˚C to +65 ˚C) and the accuracy should under 1.25 degree. Does 2.5 degree higher than test temperature is normal? Thanks & Regards Eddie + +Eddie - That measurement (+2.5C) would exceed the part spec in that operating range - would you please help get the details of how they arrived at this conclusion and would you please get the schematic and layout of the customer implementation for us? + +Eddie - closing this post, as you moved this to email, due to the confidential nature of the customer drawings. + diff --git a/data/text/DLP4/900375 b/data/text/DLP4/900375 new file mode 100644 index 0000000000000000000000000000000000000000..5fc0593a6ea4893184df4b3106f4424774afe9ba --- /dev/null +++ b/data/text/DLP4/900375 @@ -0,0 +1,6 @@ +BQ27542-G1: discharge issue at -20 degree + +Part Number: BQ27542-G1 Hi Team, we use GPC to get the report,but the pack directly discharge RSOC at -20 degrees,and the RSOC is about 8x% and directly to 0%, and the customer system can not turn on at -20 degree,so what happen to cause this problem? there problem with the battery specificaion? please kindly refer the attached. ICP535172AWRU pre spec_STD(4.4V)160928.pdf AKH08-20200422.gg.csv AKH08-(-20C)放置LOG.xlsx AKH08_GPC_Rb.zip AKH08_GPC_Chem ID.zip AKH08_GPC_Chem ID-report.zip AKH08_GPC_Rb-report.zip + +Hello Tommy, The drop to 0% is because Terminate Voltage 3200mV was reached. We need to understand why the SOC was being overestimated. Can you log the data with FCC, Rem Cap and True/unfiltered SOC being reported. + diff --git a/data/text/DLP4/900378 b/data/text/DLP4/900378 new file mode 100644 index 0000000000000000000000000000000000000000..eb689b784072568fc3356d83a3029b979c425e49 --- /dev/null +++ b/data/text/DLP4/900378 @@ -0,0 +1,10 @@ +TPS61170: Phantom power application circuit + +Part Number: TPS61170 Hi sir, I am puzzled on 48v phantom power circuit. I found in this product's datasheet a schematic to boost up to 48V for phantom power. I'm a little confused though because it lists a maximum output voltage of 38V. I tried to create the schematic in webench but it again wouldn't let me use a voltage higher than 38. The schematic appears to have additional capacitors and diodes than a typical boost topology. Could you explain how those are used to achieve a voltage higher than the listed maximum output voltage? Also, do you have any other DC-DC converters you would recommend for phantom power applications? Thank you. + +Dear Sir, Please check Figure 20. It use a charge pump circuit to achieve 48V output. + +Thank u for your Response. do you have any other DC-DC converters you would recommend for phantom power applications? + +Dear Sir, It depend on your output power. You can also choose TPS61175 with charge pump circuit. Or choose LM5001 if the output power is not big. + diff --git a/data/text/DLP4/900384 b/data/text/DLP4/900384 new file mode 100644 index 0000000000000000000000000000000000000000..bc4a17efdc3c96b4d4462e2819ee3c896b662f89 --- /dev/null +++ b/data/text/DLP4/900384 @@ -0,0 +1,10 @@ +TPS61170: Max output voltage + +Part Number: TPS61170 Hi sir, I can find max Vout is 38V in datasheet. TPS61170 - 1.2A Switch, 38V High Voltage Boost Converter in 2x2mm QFN Package however I can find 48-V Phantom Power Application Circuit in page22. /lit/ds/symlink/tps61170.pdf?ts=1587955799541 Can this device output 48V voltage? But I can not create a 48V output circuit by webench. I am a little confused on this. your suggestion will be appreciated. Thank u. Regards, + +Dear Sir, Please check Figure 20. it achieves 48V output by a charge pump circuit. + +very helpful, thank u. + +You're welcome. Good Luck! + diff --git a/data/text/DLP4/900385 b/data/text/DLP4/900385 new file mode 100644 index 0000000000000000000000000000000000000000..0507dd18cf7ffbd3965333ff24a12a391a4c00ea --- /dev/null +++ b/data/text/DLP4/900385 @@ -0,0 +1,6 @@ +UCC27524: Pulled Low of OUTA and INA + +Part Number: UCC27524 Hi Team, I only use one channel OUBT of UCC27524. I don't need to use output channel A of UCC27524. Do I need to pull both OUTA and INA low? What I need to for this two Pins? Thank you. + +Hi, Xing, Best practice would be to pull INA low, and leave OUTA open. If this answered your question, please press the Green button. + diff --git a/data/text/DLP4/900388 b/data/text/DLP4/900388 new file mode 100644 index 0000000000000000000000000000000000000000..18fe131901be72c733ccd82e5d99b7b7536d2cd0 --- /dev/null +++ b/data/text/DLP4/900388 @@ -0,0 +1,8 @@ +TPS4H160-Q1: TPS4H160 driven by an MCU on a decoupled ground + +Part Number: TPS4H160-Q1 Hicompany Support, I plan to use a common mode choke to filter the incoming 24V power. The amperage rating of the choke is less than the expected draw from the loads on multiple TPS4H160 power switches, so I would like to supply the TPS4H160 switches with the non-filtered incoming 24V supply. But since the grounds of the MCU and TPS4H160 circuits would not be exactly the same, I am wondering if it will work, and if there are any precautions I need to take. At DC, the grounds are essentially the same since the DC resistance of the common mode choke is about 65 mOhms per coil. But there is significant impedance to AC waveforms. The inductance of each coil is about 470 uH. Here is a simplified schematic showing the circuit with the grounds and supplies. I've shown example circuits for both the A and B versions of the TPS4H160. In particular, please consider the following questions: 1. Since the frequency of switching is very low, will the TPS4H160 behave properly given the ground differences I've outlined? The rising edge of the control input is an AC waveform, but only for the duration of the leading and trailing edges. The circuit should stabilize before the next edge occurs. Will the inductance of the choke cause problems with overshoot and undershoot? If so, can this be mitigated by slowing down the edges, or are there components I can add to clamp them? 2. Are there any issues with +5V and its ground supplying DIAG_EN, THER, SEH/SEL, or the fault LEDs? 3. The B version has the additional issue of the MCU accurately measuring the Current Sense (CS pin) output. Is the CS output a current source? If so, would it be permissible to connect that output to the MCU's ground? If it is truly a current source, wouldn't the voltage dropped across the resistor be accurate even though the grounds are dissimilar? But since the grounds are connected to each other via a 470 uH inductor, I assume the frequency response would be affected and the inductance could affect the current source circuit. If this is a dicey configuration, I won't do it and I will need to isolate the circuit. Or I could use a much beefier common mode choke and supply the TPS4H160 drivers with filtered 24V. Thank you very much for the help. Regards, Greg + +Greg, Could you elaborate on what exactly the 5V DC Switcher is and what its function is here? Generally we discourage having separate ground planes as they tend to be a bit unpredictable and would not represent a use case that we have tested or validated with the device's use case. It's an interesting approach, however I would say the safe approach here would be to isolate your circuit. The 5V into the control pins generally will not be an issue. The pins are rated for an absolute max of 7V. If there is anything weird going on with the ground pins though that would cause the potential to rise above the absolute max relatively it would cause problems. The CS pin is a current source. Essentially what happens is there is a current mirror inside the device that scales down the output current and outputs it to the CS pin. That current is run over an external resistor to convert it to a voltage and then the MCU's ADC is able to sample it to determine what the output current of the device is (see /lit/an/slvae08/slvae08.pdf?ts=1588020757581 for a bunch of detail on the inner workings). The inductively connected grounds here will cause some uncertainty with this pin though as any slight current variation on that pin will cause an inaccurate current reading (we are talking about mA coming out of the pin). Will it work? Maybe- however I can't really guarantee it. Probably not the answer you were looking for but the safer and more robust solution here would be to isolate your circuit. + +Hi Timothy, I included the 5V switcher in the schematic to show how the MCU was powered. Yeah, it wasn't the answer I was hoping for, but I thought I might as well ask just in case it was possible. I can see the possibility of inductive bounce causing a difference between the two grounds that could be destructive to those inputs. Thanks for the link to the app report on current sense in high-side switches. I'm sure I'll enjoy reading it. Thank you for the help. Regards, Greg + diff --git a/data/text/DLP4/900392 b/data/text/DLP4/900392 new file mode 100644 index 0000000000000000000000000000000000000000..ef82a414d8a0ac8c670c593995af7dbe7f7f7467 --- /dev/null +++ b/data/text/DLP4/900392 @@ -0,0 +1,10 @@ +CCS/IWR6843ISK: CFAR Range vs CFAR Azimuth ( People Counintg) + +Part Number: IWR6843ISK Tool/software: Code Composer Studio Dearcompany Could give some more description for these two parameters ? Which setting is the best ? What the impact of these ? We only can tuning hihger and lower only ? BR + +Hi, CFAR is a comparative algorithm that looks at energy in a current Range/Azimuth bin and compares it to the average energy of the bins around it. This is first done in the range direction, then done in the Angle direction. A bin has to pass both checks to become a point. The larger a CFAR threshold is, the stronger a reflection has to be to count as a point. We think the default values are best - otherwise we would have different defaults. Regards, Justin + +Dearcompany Default values is best for EVB only , we are try more type of our design but every type are different . Product design for end user need follow customer spec . only less information is hard to reach customer spec. and requirements If have tuning guide for product design will shorten time to market period. BR + +Hi Agate, In that case - there isn't a single best value, but for people counting, you need to understand the following on CFAR: 1. In the ideal case, you will see a point cloud roughly the size of the person when they are moving through the area - otherwise you won't get detected points, or you will get a few detected points when the person is sitting/laying/standing still. 2. You want to remove noise from other sources in the point cloud. Essentially, you want to tune CFAR so that by looking at the point cloud, you can tell where a person is when they are walking around. Before you dive too deep into this, we need to resolve the other thread you have open on the point cloud FOV. Regards, Justin + diff --git a/data/text/DLP4/900399 b/data/text/DLP4/900399 new file mode 100644 index 0000000000000000000000000000000000000000..53530474fc86d651e5e361b18a3765b3d0cec5f0 --- /dev/null +++ b/data/text/DLP4/900399 @@ -0,0 +1,6 @@ +LM22674: LM22674-5 Ripple Voltage + +Part Number: LM22674 Hi, Could anyone share the peak to peak ripple voltage of LM22674-5. Couldn't found out from datasheet. Kindly reply. Warm regards, Monisha O M + +Hi Monisha, Please simulate your circuit in Webench for detail performance data B R Andy + diff --git a/data/text/DLP4/900404 b/data/text/DLP4/900404 new file mode 100644 index 0000000000000000000000000000000000000000..e25c7ed5f77adbbfc627b742a159b30c3edefb83 --- /dev/null +++ b/data/text/DLP4/900404 @@ -0,0 +1,8 @@ +BQ77905: Is the BQ77905 series battery protection chips directly compatible with the BQ76200 high-side driver chip? + +Part Number: BQ77905 Hi: I am still looking at using the BQ77905 battery protection chip for a pack-side project. Are the BQ77905 battery protector and 76200 high-side mosfet driver fully compatible? I need a simple solution with minimum parts count and low power drain. Thnaks, Tom + +Hi Thomas, Yes and no. The BQ77905 CHG and DSG will drive the CHG_EN and DSG_EN inputs, check the voltage levels, a series resistor or even a divider may be desired for the maximum conditions. The BQ76200 will add quiescent current, as will the divider on the inputs if you use it. Being a simple low power protector the BQ77905 supports low side switching, the LD input is intended for low side switching. If your configuration needs LD for fault recovery you will need to design some method to control the pin. That might be a transistor with pull ups, they will take some bias current, or your system may have some other mechanism available for control. + +Looking further at the BQ76200 specs I see that the minimum Batt voltage is +8.... that could be a problem when a pack is deep discharged. I am currently using a ABLIC S-8254AAW chip, it uses p-channel mosfets to control the charging and discharging. Would it not be possible to use transistors and the BQ77905 to control p-channel fets in a similar fashion? If anyone has done this please give an example circuit or description of how it was accomplished. Tom + diff --git a/data/text/DLP4/900412 b/data/text/DLP4/900412 new file mode 100644 index 0000000000000000000000000000000000000000..51cc771e7f6a302b32f81489a0ff0131445a410b --- /dev/null +++ b/data/text/DLP4/900412 @@ -0,0 +1,6 @@ +BQ27750: How to select battery chemistry on BQ studio? + +Part Number: BQ27750 I am connecting the BQ27750 to a LP735977JH( https://www.jauch.com/downloadfile/5c651f00637eeb997b85c8a1241fde6d5/product_safety_data_sheet_lpxxxxxxjh_1s1p_3.7v_2019_.pdf) battery. In BQstudio I think that this battery chemistry corresponds to "0100 LiCoO2/graphitized carbon" is this correct? Also why is there different model numbers on the "Chemistry Programming" section of BQStudio? Does it matter which one I select? Thanks for your help! + +Hi Rich, Please use GPC Chem tool to find the closest chemistry match in our database. This tool will help you find the closest chemistry model to the battery you wish to use. Information can be found at this link: /tool/GPCCHEM There is a useful video on this page that can walk you through the process. Thanks, Rushi + diff --git a/data/text/DLP4/900416 b/data/text/DLP4/900416 new file mode 100644 index 0000000000000000000000000000000000000000..624ca4ba89449fcf380ee2631e69260e75b529fe --- /dev/null +++ b/data/text/DLP4/900416 @@ -0,0 +1,8 @@ +UCC29002: High Voltage, High-side Current Sensing Application for Load Share Controller + +Part Number: UCC29002 Hi, I am working on a project that will be using the UCC29002 on a 24V power stage. Referring from the datasheet, figure 5 suggests a circuit configuration for high voltage application, however this recommended circuit is not applicable in my project because the 24V power stage shares the same ground with the 5.1V and 3.3V power stages. That means I have to place the sense resistor along the positive 24V rail and I need to do some workaround to maintain safe voltage levels on the CS+, CS- and ADJ pins. I have a couple of questions: 1. Can you give me a recommendation on a circuit configuration that will input safe voltage levels on CS+ and CS- from a sense resistor along the positive 24V rail? I am planning to insert the INA139 current shunt monitor across the sense resistor and make its output enter the current sense amplifier of the UCC29002 in non-inverting amplifier configuration. Is this a good idea? 2. The 24V power stage has a feedback circuit based on TL431 and an optocoupler combination. I would like to ask on how to effectively attach the ADJ pin on this kind of high voltage feedback circuit. Is there a way to do this? Thanks, Chester + +Hello Chester Attached is a reference document that details suggestions for application issues with the UCC29002 load share controller.. Page 8 shows a recommended circuit for high side current sensing with a high voltage output. You can set the CS+,CS- input levels to be within the operating voltage range for the CS amplifier and there should be no need to use a part like the INA1139. All of the applications I am familiar with use a resistor current shunt with the internal current sense amplifier. I dont understand your second question. The power module you are controlling is required to have separate output and sense lines. There is a small resistor (usually 100 Ohms or so) between Vout and Sense +. The UCC29002 controls the signal on S+ . This controls the feedback signal within the power module and raises or lowers Vout accordingly. Using a TL431 with optocoupler may be part of this feeback loop and the UCC290002 is designed to operate in such a system. Regards John0726.UCC29002_REF.pdf + +Hi John, Thanks for the suggestion on the input of the CS+ and CS- pins. I tried the configuration shown on page8 before but the voltage from the resistor dividers are higher than 4V. Since the voltage on CS pins must not exceed 4V as recommended, I will try this again with around 2V from the dividers and check the response. I hope I will get a better result this time. Referring to page8 circuit, can you please enlighten me about the following: 1. What is the purpose of the NPN BJT connected to ADJ pin5? 2. How will the trace +SENSE connect to the power module? In my project's case, the 24V power stage (full-bridge LLC) being controlled by UCC25600. 3. Is there a load share controller more suitable for high voltage application available in your portfolio of products that is similar in pin configuration? Thanks and regards, Chester + diff --git a/data/text/DLP4/900420 b/data/text/DLP4/900420 new file mode 100644 index 0000000000000000000000000000000000000000..cb5ec2dc8c6377db077763ab029621adaa5cafaa --- /dev/null +++ b/data/text/DLP4/900420 @@ -0,0 +1,6 @@ +OPT3001: We are looking for ip65 outdoor LuX level transmitter/sensor.. + +Part Number: OPT3001 HI , Could you please suggest us the END USER for Complete Sensor model based on Texas controller OPT3001… We would like buy the complete sensor Unit .. Please share the contacts who manufactures or at least same IC would purchasing fromcompany , Such that it would help us to contact . + +Hi, I do not have any end user enclosures for sale meeting ip65 to recommend here. Best, Alex + diff --git a/data/text/DLP4/900426 b/data/text/DLP4/900426 new file mode 100644 index 0000000000000000000000000000000000000000..4fe46d8c33e2121bf79e588355f109bf6fbd00d3 --- /dev/null +++ b/data/text/DLP4/900426 @@ -0,0 +1,8 @@ +AWR1843: BIST time + +Part Number: AWR1843 Hi Experts, How long does it take to complete boot time BIST on AWR1843? Best regards, Ken + +Hello Ken, Many of BIST test are done during the boot up time. And bootup time can be read from BSS using rlGetRfBootupStatus API. All the BIST test which it does will be within the bootup time received in above API response. Regards, Jitendra + +Ken, Boottime for BSS is ~10ms Boot time for MSS is dependent on: SFLASH based boot/SPI based boot Secure vs non-secure device Application Image size etc.. The boot time of ~100ms for a AWR1843 device boot . BR, Raghu + diff --git a/data/text/DLP4/900439 b/data/text/DLP4/900439 new file mode 100644 index 0000000000000000000000000000000000000000..2791e87448357120594266b90b58b4afc95c14f3 --- /dev/null +++ b/data/text/DLP4/900439 @@ -0,0 +1,6 @@ +DRV5032: Product recommended + +Part Number: DRV5032 Hi sir, Can you give me some Suggestion on product selection? Requirement: Hall sensor switch Hall sensor PCB system which have 8*8 hall sensor matrix Pieces should be detected only at particular height Output signal: Digital pulse Height of detection : within 6mm from the surface Power: 3.3~5v Neodymium magnet detection : N42 6mm*1.5mm cylindrical size thank u, Regards, + +Hayashi-San, Could you clarify which length is the diameter of the magnet? The two geometries will behave differently. I assume there is an existing system and placement of the sensor cannot be adjusted much? There is a calculator tool available on each of the DRV5032, DRV5023, or DRV5021 landing pages that can help with this sort of activity. It allows the user to enter magnet dimensions and it will report the distances to trigger BOP and BRP for the various sensitivities. DRV5032 DRV5021 DRV5023 In the above cases, the calculator shows the maximum BOP points for the magnet settings provided. The closest device to the specific distance provided would be DRV5021A3. In all of the cases above this value is based on the datasheet maximum value for BOP to ensure all device would trip by the advertised distance. + diff --git a/data/text/DLP4/900457 b/data/text/DLP4/900457 new file mode 100644 index 0000000000000000000000000000000000000000..065095320d0be0034cc1063521fbd0f44679cc27 --- /dev/null +++ b/data/text/DLP4/900457 @@ -0,0 +1,8 @@ +IWR6843: HVAC GUI error - visualizer in 4.2.1 toolbox + +Part Number: IWR6843 I can use GUI at HVAC mode normally by installing the visualizer incompany toolbox, but when I generate an exe file from gui_main.py to run GUI, it always closed immediately after 1 frame of data. This problem happened with updated GUI python program. When I used the old version of GUI, I generated my own exe file without any problem. Due to the lack of HVAC mode in the old GUI version, so I must use an updated GUI. But this updated GUI python program makes me can't run GUI by my own exe file anymore. Please tell me the root cause and solution. + +Hi Hector, With the older gui, you can use IFDM or Indoor False Detection Mitigation with the HVAC demo. Regards, Justin + +Hi Justin, 1. I ran new GUI after modified it to re-open GUI without having to reset device. But now, when I run HVAC mode, GUI has green light flashing. I tried both baud rate at 921600 and 921600*2 but i still happened. What's the cause? 2. So I only need to modify GUI python code Indoor False Detection Mitigation to a new name as HVAC, will it work normally without green light flashing as in the video below? Please help me solve the green light flashing issue with updated 4.2.1 toolbox GUI or GUI old version for HVAC, and point out the part that caused this issue. Below is the video and my GUI python code after modified gui_main2.zip https://www.youtube.com/watch?v=z1xVYQ8kgMw&feature=youtu.be + diff --git a/data/text/DLP4/900464 b/data/text/DLP4/900464 new file mode 100644 index 0000000000000000000000000000000000000000..55785fdf62fe9d10028b80980ac2bd5a8f6c0afc --- /dev/null +++ b/data/text/DLP4/900464 @@ -0,0 +1,8 @@ +TPS2546: does this part have reverse current blocking function? + +Part Number: TPS2546 Hi Team, quick check , as title , does this part have reverse current blocking function? my customer is asking this question , and per my check on d/s this part didn't have the function above, just wanted to have a quick sync on this to confirm if my understanding is correct, thanks! + +Hi Andy, No the TPS2546 does not offer any RCP functionality. However, it may not necessarily be needed as the application a TPS2546 is used in should not have another voltage presented on VBUS. If you do want protection, you can use a device like the TPD1S514-1 connected to the TPS2546 which will protect against over voltage events on VBUS. + +Hi Adam, Thanks for the check and reply. I would like check one more function on TPS2546 , the EN(enable) function customer wanted to know, the enable pin on TPS2546 will turn on/off the power and signal path together , is that correct? I would say this is correct , and customer can see from the d/s pin define(figure below), customer have this doubt is due to the block diagram(d/s 8.2) only show the enable of power path but not signal path, I assume the block diagram just only the simplified schemaitc, not the detail internal circuit. + diff --git a/data/text/DLP4/900489 b/data/text/DLP4/900489 new file mode 100644 index 0000000000000000000000000000000000000000..16674a9aa608b9631bcdb2d5746346a6ede8f5d6 --- /dev/null +++ b/data/text/DLP4/900489 @@ -0,0 +1,10 @@ +Asking for the HDC2021 & TMP75AIDGKR reliability test report + +Hi Team, Customer is designing HDC2021 & TMP75AIDGKR. Would you please let me know where can download the HDC2021 & TMP75AIDGKR reliability test report? BR, SHH + +Hi SHH, Quality and reliability information can be found here: /support-quality/quality-reliability.html HDC2021 is still "in preview" and may not have all data available on . Thanks, David + +Hi David, I went into the site you provided. I did not see search function to search TMP75 and HDC2021. Can you help? BR, SHH + +SHH, The panel on the left hand has different links for different qualification and reliability information. Qualification Report: /qualificationsummary/qualsumm/home?actionId=2800 Material Content Report: /materialcontent/home Moisture Sensitivity Level: /packaging/docs/mslsearch.tsp Thanks, David + diff --git a/data/text/DLP4/900492 b/data/text/DLP4/900492 new file mode 100644 index 0000000000000000000000000000000000000000..8a4d6605c64b5a524b372969381acd5f9c8e82f5 --- /dev/null +++ b/data/text/DLP4/900492 @@ -0,0 +1,10 @@ +IWR1443BOOST: Where can I find a timmwave_ros_pkg? + +Part Number: IWR1443BOOST Hi, I went to thecompany developer hub and went to the folder containing ROS PointCloud visualizer but for some reason there is no source code but only the documentation. Where can I find that package? + +Hi, Please see TIREX for ROS examples BR, Charles O + +But again, there are no source files. + +Hi Please download and install the toolbox. the source is included in the robotics folder. BR, Charles O + diff --git a/data/text/DLP4/900502 b/data/text/DLP4/900502 new file mode 100644 index 0000000000000000000000000000000000000000..1d212d4f16cd4b071b6bb18eeca9138b521e27f9 --- /dev/null +++ b/data/text/DLP4/900502 @@ -0,0 +1,6 @@ +CSD87381P: Q1 Control FET / Q2 Sync FET + +Part Number: CSD87381P Hi, Could you please let me confirm about Control FET and Sync FET? Datasheet doesn't explain what they are. But I guess - Q1 Control FET -> High side FET - Q2 Sync FET -> Low side FET Is my understanding correct? Regards, Nagata. + +Hello Nagata san, Thanks for the inquiry. Your interpretation is correct. Q1 (control FET) is the high side FET and Q2 (sync FET) is the low side FET in a half bridge configuration optimized for synchronous buck converter. + diff --git a/data/text/DLP4/900505 b/data/text/DLP4/900505 new file mode 100644 index 0000000000000000000000000000000000000000..a2039d4ee911b7da4496c246668168243fadaab6 --- /dev/null +++ b/data/text/DLP4/900505 @@ -0,0 +1,8 @@ +TPS53915EVM-587: Non-matching between schematic and layout on the TPS53915EVM-587 board + +Part Number: TPS53915EVM-587 Q1) I found that in the schematic is AGND (pin 22) connected to PGND via resistor R8 = 0R but in the top layer, I saw that pin 22 (AGND) connected directly to IC's Thermal Pad. So that I get confused about this connection. Which one is correct? Q2) Can R8 change be to ferrite bead? and Can you recommend the part number? I also attached the picture for more details. Thanks a lot Tuan Le + +Tuan Le1 Q1) I will check on why the schematic and the layers are out of SYNC. They Layout appears to be using a "net-tie" to directly connect the pin to the thermal pad without using a resistor. This is preferred over connecting the AGND pin to the thermal pad through a resistor. Q2) R8 (AGND to PGND) should not be a ferrite bead. The high impedance at high frequency between AGND and PGND could interfer with the IC's functionality as digital signals cross from the Analog Ground to Power Ground domains within the chip. + +Dear Peter Thank you for your reply soon I have another question according to Q1. In my project I already used TPS53915 to convert from 12V to 1.8V/7A. But when I measured signals as power good, SM Bus and Address pins then I saw that they have some noise. After check layout in my board, I see it different with TPS53915EVM-587 at pin 22 connected directly to thermal pad. I asume that this is reason why my board have noise. If correct, could you explain this one? I will explain about layout in my board, I drew pin 22 (AGND) via from Top layer to Bottom after that connect to resistor R8 = 0R to PGND at bottom and via from bottom to Top layer to connect to IC's Thermal pad. I also attached picture for more details Thanks Tuan Le + diff --git a/data/text/DLP4/900510 b/data/text/DLP4/900510 new file mode 100644 index 0000000000000000000000000000000000000000..68f291880fcde4c53da048bdacb65d1f44ba40f9 --- /dev/null +++ b/data/text/DLP4/900510 @@ -0,0 +1,8 @@ +FDC2214-Q1: How can we decide sensing length? + +Part Number: FDC2214-Q1 Hi team, I would like to use proximity sensor to detect human hand and measurement range is 4cm ~ 9cm. How can we decide sensing length? Is it related to how large sensor plate is? Also, could you tell me the difference and benefits between capacitive sensing method and inductive sensing method? Regards, Ochi + +Hello Ochi, Yes, the sensing range is based on the area of the sensor plate. This application note gives guidelines about the sensing distance for various sensor plate sizes. If the target is metal, we almost always recommend using inductive sensing. This is because inductive sensing is immune to the effects of non-conductive targets, so there are fewer possible environmental disturbances. We recommend capacitive sensing if the target is unsuitable for inductive sensing (like a human hand). Both the FDC2x1y devices and the LDC devices use the resonant sensing approach that makes them immune to broadband noise. Best Regards, + +Hi Jones, Thank you for your explanation. I understood I can use FDC devise for capasitive sensing. I wonder if is it possible to detect lower than 10cm with FDC device. Figure.3 in application note looks that the detection range is above 15cm. Could you tell me whether it is possible or not? If possible, how can we achieve that> Regards, Ochi + diff --git a/data/text/DLP4/900512 b/data/text/DLP4/900512 new file mode 100644 index 0000000000000000000000000000000000000000..bda962dbcc1e194c59bb26475150549d6a55e13a --- /dev/null +++ b/data/text/DLP4/900512 @@ -0,0 +1,6 @@ +TPS543B20: TPS543B20 transient performance issue + +Part Number: TPS543B20 Hi all, My customer want to improve TPS543B20 transient performance to compete with IR3895 and they try to modify RAMP circuit as EVM. Would you please helping to provide calculation tool so customer can modify evm's setting to test? Thanks. VIN 12 V VOUT 5 V D 0.416667 IOUT 15 A FSW 500 KHZ Best regards, Gary Teng gary.teng@arrowasia.com + +Gary Teng The TPS543B20 ramp selection resistor table is on page 16 of the datasheet - /lit/ds/symlink/tps543b20.pdf#page=16 The larger Cramp, the smaller the internal ramp will be and the faster the transient response will be. Including a voltage feedforward capacitor (C22 in the above schematic) will impose more of the output voltage directly on the feedback pin, also increasing the transient response, this is especially effective for a 5V output that would have a large Vout to RSP divider ratio. Rramp = 187kOhms is the second highest Cramp value. Furthering increasing the loop response will require removing the Ramp resistor (R2) to select the largest Cramp capacitor, or reducing the inductor value to speed up the loop response. + diff --git a/data/text/DLP4/900529 b/data/text/DLP4/900529 new file mode 100644 index 0000000000000000000000000000000000000000..0a4cff74b7a9a4c8719b1ad6579bf92fa880f4f0 --- /dev/null +++ b/data/text/DLP4/900529 @@ -0,0 +1,6 @@ +TPS3702-Q1: SET pin open + +Part Number: TPS3702-Q1 Hi, Please let me know is it mandatory to connect SET pin. What will happen if it is floating? Regards, Amar. + +Hi Amar, It is mandatory to connect the SET pin on this device to select the threshold level. The device requires an accuracy band to be set to be able to trip at the correct voltage level. If the pin is floating, it will not be able to correctly distinguish between the desired levels on the device. Thanks, Abhinav. + diff --git a/data/text/DLP4/900530 b/data/text/DLP4/900530 new file mode 100644 index 0000000000000000000000000000000000000000..91661a3aebde4be814f6652163603d5c16ee68e5 --- /dev/null +++ b/data/text/DLP4/900530 @@ -0,0 +1,6 @@ +BQ25570EVM-206: BQ25570EVM-206 + +Part Number: BQ25570EVM-206 Hi, I have the above evaluation board, and for the purpose of my master thesis i must do calculation with simulink or pspice. Is there any model existed for the above ic? + +Tasos, Unfortunately, there is no Simulink model. There is an older, no longer supported PSpice (TI-Tina spice) model for BQ25504 and possibly BQ25505 but those are scheduled for web removal soon. The models are very simplified and do not account for all operating conditions. Regards, Jeff + diff --git a/data/text/DLP4/900547 b/data/text/DLP4/900547 new file mode 100644 index 0000000000000000000000000000000000000000..26bca771edb48034f9eb7ff96dcf804b97f7aac7 --- /dev/null +++ b/data/text/DLP4/900547 @@ -0,0 +1,6 @@ +IWR6843ISK: Boot IWRxxxx chip into the primary boot-loader from application + +Part Number: IWR6843ISK Hello Team, I'm developing an interface in the RTOS application to boot into the primary boot-loader on soft-reset. As per my study, the MSS R4F processor has been enabled to boot from TCMA region and the MSS_TCMA_ROM section seems to be eclipsed by bootrom code. Only the post-eclipse view with MSS_TCMA_RAM remapped to 0x00000000 is visible to the application. I would like to disable ROM eclipsing, retain the pre-eclipse view for my use case or restore pre-eclipse view by fetching the ROM code into the TCMA RAM and remap the address table if that is possible. Could you please suggest on feasibility of disabling the ROM eclipsing in the ROM code via some commands or developer details on fetching the bootrom code into TCMA RAM. Thanks, Dinesh + +Hi Dinesh, ROM Eclipsing is performed by the Bootrom itself and hence it is not possible to disable this functionality and/or fetch the bootrom code in software. Could you provide some details on your use case and what you are trying to achieve? Thanks -Nitin + diff --git a/data/text/DLP4/900550 b/data/text/DLP4/900550 new file mode 100644 index 0000000000000000000000000000000000000000..181424b8fc5078bf9a9a9616b624e0611f77257e --- /dev/null +++ b/data/text/DLP4/900550 @@ -0,0 +1,6 @@ +UCC256403: Best Devices for Bench Power Supply with multiple Isolated Outputs + +Part Number: UCC256403 I am coming up with a multi-output bench PSU design that's inspired by Linear's reference design here. The requirement is for a 3 channel PSU with isolated outputs: two would be 0-32V at 6A and one would be 0-6V at 6A. That Linear (now AD) design pre regulates the incoming voltage with a SMPS which tracks the output voltage +1.7V thus minimizing the power dissipated in the linear stage. I was looking for a suitablecompany part to mimic the functionality of the LT8612 in that design. There are a few questions I have: 1. What IC would match the LT8612 but ideally also add isolation? I put the UCC25640-3DDBR in this thread as this is a part that I got from a WEbench design for a 40-50V input, 5V 6A isolated output design but maybe that won't be a good choice as, I'd like to be able to vary the SMPS output between 1.7 and 33,7 V and there's no way to specifiy that in WEbench that I can see. 2. The Linear reference design uses a 40V DC input which could be met by a frame SMPS at 48V, 400W. The idea did occur to me that I could have the switcher circuit in item 1 above regulate all the way from the rectified AC input down to 1.7V (doing away with the need for the frame PSU) but this is probably impractical at the currents I want plus I would still need 3 circuits to get isolation between channels and my PCB would end up having 400V DC on it! 3. Those isolated designs in WEbench give part numbers for cores and a turns ratio for primary and secondaries but, where can I get practical guidance for actual wire gage and number of turns? Thanks in advance. + +Hello LLC, Converters operate extremally well with an input off less then two to 1. Or a varying output of two one that being said I would recommend against using the UCC256403 for this application. Be cause you have one output that is going to vary 1.7V to 33V and the other output is 0 to 6V. You might want to use a UCC28C42 for a simple fly back for each at those power levels. Regards, Mike + diff --git a/data/text/DLP4/900553 b/data/text/DLP4/900553 new file mode 100644 index 0000000000000000000000000000000000000000..57b61a3674df24e5e3f4ea338e216cc6ce95ec0b --- /dev/null +++ b/data/text/DLP4/900553 @@ -0,0 +1,8 @@ +LM5155-Q1: buck-boost mode in flyback + +Part Number: LM5155-Q1 Hi Team, My customer is finding the isolated DC/DC solution and below is the spec. Vin = 13V-36V (nominal = 24V) Vout = 24V Iout = 4A I find that LM5155-Q1 could meet their requirement. Do you have any more appropriate solution? Thank you for your support. Regards, Roy + +Hi Roy, Thanks for reaching out with your questions and for considering the LM5155 in your design For a flyback converter 100W is achievable but will need to ensure the output diode isn't too hot at full load. To work around this the UCC24612 can used to make the flyback a synchronous topology as shown in PMP40569. A good staring point for this design is PMP22151. Please let me know if you have any questions. Thanks, Garret + +Hi Garrett, Thank you for your comments. In addition, the customer would concern the efficiency of light load, do we have more appropriate solution? Regards, Roy + diff --git a/data/text/DLP4/900554 b/data/text/DLP4/900554 new file mode 100644 index 0000000000000000000000000000000000000000..c2e157f2c0cf7a00f4c05d95633a81e28ff9e581 --- /dev/null +++ b/data/text/DLP4/900554 @@ -0,0 +1,6 @@ +UCC256402: How is OCP validated and tested + +Part Number: UCC256402 Hi Friends: I want to verify OCP's functionality. Is there any way to verify OCP's functionality? OCP1 / OCP2 / OCP3, what are the methods of verification respectively; Thank you + +Hello, Sure there is adjust the output current and monitor the ISNS, DRV, HO and lower pins and vary the load on the output just make sure the device does what is supposed to based on the block diagram, the capacitor dividers and the VISNSE_OCP1/2/3 thresholds specified in the data sheet. I would also recommend that your resonant capacitor, VCR and ISNS dividers are setup correctly for this as well. You can use the equations in the data sheet or the excel design tool that can be found at the following link. /lit/zip/sluc675 Regards, + diff --git a/data/text/DLP4/900555 b/data/text/DLP4/900555 new file mode 100644 index 0000000000000000000000000000000000000000..0536280fbbe6e5a2b9b731179af8bc372a4b20d3 --- /dev/null +++ b/data/text/DLP4/900555 @@ -0,0 +1,6 @@ +BQ40Z80: Update the QMAX and RA tables during rest cycles + +Part Number: BQ40Z80 Can you link me to the documentation or describe the process to update the QMAX and RA tables of the Bq40Z80 during rest cycles? I have a customer that is able to implement the process, but not consistently. I'd like to make sure he is checking all of the boxes for the process. Thank you! + +Hello Will, here's the learning cycle document for bq40z80. /lit/an/slua848/slua848.pdf + diff --git a/data/text/DLP4/900564 b/data/text/DLP4/900564 new file mode 100644 index 0000000000000000000000000000000000000000..6eca3894f7b83af52176a6c4421c9b627d372cc2 --- /dev/null +++ b/data/text/DLP4/900564 @@ -0,0 +1,8 @@ +TPS55160-Q1: Higher input voltage capability + +Part Number: TPS55160-Q1 Hi I consider using a LM5176 with an input voltage down to 3.6V and it will therefore need a 9V bias voltage. For this task TPS55160-Q1 was suggested but the issue with this part is that the max input voltage is 36V and the abs. max. is 40V. But in my application we have the following specifications: Nominal Input voltage: 3.6 to 36V Input overvoltage TVS protection = TPSMA6L36A: VbrMax = 44.2V @ It = 1mA Output voltage: 9V Output current: 4mA Ambient temperature: The board will be mounted inside a box with no air flow and the temperature inside the box is estimated to be up to about 83C and down do -40C. The building height should be kept below 4mm where possible, and the absolute max building height is 8 mm. If You have any suggestion for a similar part that can handle higher voltages, it would be a big help. Best regards Klaus + +Dear Sir, The closest part is TPS55160-Q1, but you need to clamp the maximum input at 36V . Ensure it will never exceed this value. LM5176 is OK, but it is a little bit over design. You can also use LM5001 in Sepic topology. + +Dear Helen, I agree that a LM5176 design would be to big. LM5001 looks more tempting but when I try to enter my requirements in WEBENCH I get different error messages when Try to update my design. Best regards Klaus + diff --git a/data/text/DLP4/900566 b/data/text/DLP4/900566 new file mode 100644 index 0000000000000000000000000000000000000000..741aecf528cd24d43f981096b0101921f8c54267 --- /dev/null +++ b/data/text/DLP4/900566 @@ -0,0 +1,12 @@ +PGA300EVM-034: PGA + +Part Number: PGA300EVM-034 Hi Guys, I have got a problem about PGA300 calibration. The error is in the below. Thank you for your help, Best Regards + +Hello Ibrahim, After what step in the calibration do you see the error? The most likely reason is that there is something incorrect in the configuration file. Can you share the configuration file you used for this calibration? Thanks, + +Hello Scott, I get the error after activating OWI in "Guided Calibration". The Calibration file is in the attachment. Thanks, Calibration Settings - 3P1T - Voltage Mode - 0 to 10.ini + +Hi Ibrahim, It looks like the problem is in the configuration file. You currently have your Calibration Mode set to 3P-1T. However, for your Temperature Points and your Pressure Points you have 4 points each. If you would like to use 4 temperature and 4 pressure points, you should set the calibration mode to 4P-4T. Additionally, for the DAC data, you only have 3 output points. Typically you would use 4 points if you have 4 pressure points. Each DAC data point will correspond to one of your pressure points. If the number of points is mismatched you will not be able to perform the calibration. Regads, + +Thank you for your reply, I tried it but the status is unsuccesful. Could you send any running calibration file as example ? Best Regards, + diff --git a/data/text/DLP4/900568 b/data/text/DLP4/900568 new file mode 100644 index 0000000000000000000000000000000000000000..af497446cfe7db22019a4f87016e3dd25082927b --- /dev/null +++ b/data/text/DLP4/900568 @@ -0,0 +1,12 @@ +Compiler/DLPLCR4500EVM: DLP4500 Doesn't take any action + +Part Number: DLPLCR4500EVM Tool/software:company C/C++ Compiler . I can't take any action, it remained like this I can choose the 'Led Selection' It worked fine 3 days ago Although I upload the firmware(DLPR350PROM_v4.0 - /DLPR350PROM_v4.1) In addition, in video mode not set image from flash. Nothing happens, the pattern in the picture LED under the board lights red for a while and then green and stays that way. + +connecting cable which is a band plug with copper encrusted disscontected, I put the cable back in But I'm having this problem now There are 3 horizontal spaces + +Onur, For the first image, it looks like you have a faulty connection to the DMD. Was that the problem? As for the second image, is this a result of booting or after sending a command to the system. If so, which commands? Regards, Philippe Dollo + +For the first image, yes I solved that problem. I'm not sending a command. in addition, 3 horizontal spaces are flashing. Pressing lightly on the socket of the DMD connecting cable by hand causes the device to turn off and on again. + +Closing this thread. It is being answered in the following thread. /support/dlp/f/94/p/900690/3329880#3329880 regards, Vivek + diff --git a/data/text/DLP4/900576 b/data/text/DLP4/900576 new file mode 100644 index 0000000000000000000000000000000000000000..12d38ecb4cc994fdc4e88d2006c05a721a2d9f8b --- /dev/null +++ b/data/text/DLP4/900576 @@ -0,0 +1,6 @@ +PTD08A020W: Two PTD08A020W parallel connection + +Part Number: PTD08A020W I use UCD9248 as power controller and PTD08A020W as power stage. One PTD08A020W module is not enough to supply current considering my application. I use 2 PTD08A020W modules in parallel connection source up to 40A current. I am not sure how to connect the modules in parallel. Can I just connect the VOUT of the two stage? The datasheet shows connecting VOUT is OK. But I am worried if two stages output voltage with a slight difference, the power stage outputing a higher voltage will source the power stage outputing a lower stage. + +Hi Maverick, As you mentioned, connecting the VOUT of the two stages like in Figure 19 of datasheet should be okay. Your concern over the two power stages connected like this is reasonable, due to all identical DC/DC converters will not have symmetrical output. But, that is where this particular controller comes in. The controller integrates multi-loop management with sequencing, margin, tracking and intelligent phase management to optimize for total system efficiency. In other words, the controller provides the right protection over your concern. Regards, Alejandro + diff --git a/data/text/DLP4/900578 b/data/text/DLP4/900578 new file mode 100644 index 0000000000000000000000000000000000000000..62583aaaa91b591e432946b0bbbb846d201060da --- /dev/null +++ b/data/text/DLP4/900578 @@ -0,0 +1,6 @@ +TPS1H100-Q1: Sizing of ground resistor and diode + +Part Number: TPS1H100-Q1 Regarding the GND pin> Do you have a guide how to size the RGND resistor and the diode? Can this pin be connected directly to GND? Thanks Viktorija + +Hi Viktorija, The recommended resistor is a 1-kOhm resistor in parallel with a diode with a forward current greater than 100-mA diode. If you have upstream power protection such as an ideal diode on the VS pin, you can tie it directly to GND. + diff --git a/data/text/DLP4/900579 b/data/text/DLP4/900579 new file mode 100644 index 0000000000000000000000000000000000000000..183dd5329d4cb7c9fd9ef795da654148cbae8d85 --- /dev/null +++ b/data/text/DLP4/900579 @@ -0,0 +1,6 @@ +BQ25970: How to calculate the resistance in bq25970 while fast charging + +Part Number: BQ25970 Hi team, How to calculate the resistance in bq25970 while fast charging? do we have any guideline? BR brandon. + +Hi Brandon, Please check your email. I just sent you detailed BQ25970 information regarding your question. Thanks! Best regards, Angelo + diff --git a/data/text/DLP4/900589 b/data/text/DLP4/900589 new file mode 100644 index 0000000000000000000000000000000000000000..207fbde1b520522b3ca06d69fca93bae80d1c41e --- /dev/null +++ b/data/text/DLP4/900589 @@ -0,0 +1,8 @@ +UCC27714: About 4A Peak Output + +Part Number: UCC27714 Hi Team, I understand that “4A peak Output ” is HO and LO total current. (I referred to "IOUT of Absolute Maximum Ratings" and "IGPK of OUTPUT BLOCK".) -OK case: HO peak output current is 4A, LO peak output current is 0A (Total 4A peak output and PW <100ns) -OK case: HO peak output current is 2A, LO peak output current is 2A (Total 4A peak output and PW < 10us) -NG case: HO peak output current is 3A, LO peak output current is 3A (Total 6A peak output) Is my understanding correct? Regards, Hide + +Hello Hide, The UCC27714 driver HO and LO outputs are rated at 4A typical on each channel. Each driver output is capable of the 4A peak output even if both outputs are active at the same time. There is a limitation of the average, or DC current of 250mA on each output, which is usually not a concern when switching MOSFET Vgs as the peak gate currents are very low duty cycle. Confirm if this addresses your questions, or you can post additional questions on this thread. Regards, + +Hi Richard-san, Thank you for your prompt reply and information. I greatly appreciate your cooperation. Regards, Hide + diff --git a/data/text/DLP4/900596 b/data/text/DLP4/900596 new file mode 100644 index 0000000000000000000000000000000000000000..70682e308b9c37fb62a0f6611a0b76fe83cfb6c8 --- /dev/null +++ b/data/text/DLP4/900596 @@ -0,0 +1,14 @@ +TMP102: TMP102 + +Part Number: TMP102 I've downloaded the tmp102.c file (drivers/hwmon/tmp102.c) and I want to use it in an Eclipse project, details below... Eclipse IDE for C/C++ Developers Version: 2019-09 R (4.13.0) Build id: 20190917-1200 OS: Linux, v.4.19.0-6-amd64, x86_64 / gtk 3.24.5 Java version: 11.0.4 If I check the Linux device tree documentation on thecompany tmp102 page (...I2C/trivial-devices.txt) it says the path's not found. If I check Other Files on thecompany tmp102 page (Documentation/hwmon/tmp102) it says the path's not found. So, I've started a new c project withthe tmp102.c file, but I've got a problem that Eclipse reports fatal errors since it doesn't know where some of the Linux headers are installed, see below... Can you please advise where I'd find these headers? Thanks + +Dear JoeP - I see what you mean - it looks like the paths that cannot be found were changed to: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/devicetree/bindings/trivial-devices.yaml and https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/hwmon/tmp102.rst + +Hi Josh, First thanks for your quick reply. The link you sent me is for "Trivial I2C and SPI devices that have simple device tree bindings" it looks like a it's a list of programs that people have written to help them use these devices quickly - nice idea, but it doesn't help me in specifying where Eclipse can go to find the .h files that are missing. Any ideas? Thanks + +also, found this here for you https://github.com/torvalds/linux/blob/master/drivers/hwmon/tmp102.c + +Hi Josh, thanks the file you found is just the tmp102.c file again. If you see from the top of the file there's lots of #include files - my problem is I don't know where these files are - so I can't specify the path for the compiler JoeP + +Dear JoeP - all of the listed include files are in the kernel, located here: https://github.com/torvalds/linux/tree/master/include/linux + diff --git a/data/text/DLP4/900608 b/data/text/DLP4/900608 new file mode 100644 index 0000000000000000000000000000000000000000..e7b35d6897da05240c92e10af3d7955e0fcb0d84 --- /dev/null +++ b/data/text/DLP4/900608 @@ -0,0 +1,14 @@ +BQ25616: BQ25606 vs BQ25616. I don't found the difference. + +Part Number: BQ25616 First I want to apologize if this question seems silly. But I was analyzing the datasheets of both components and I don't find a substantial difference between both components. I clearly understand that the BQ25616 is a higher version than the BQ25606, but I can't find the improvement. If someone helps me I would be very grateful. Gustavo + +Hi Gustavo, Below are some of the differences: BQ25616 has optional external OVPFET control to provide an extra layer of protection against input voltage transients, and is controlled by ACDRV pin. This has a fast response of 130ns turn off time. Note this can be disabled if not needed as well. BQ25616 employs HOT/COLD temperature charging profile, while BQ25606 uses JEITA. The BQ25616J is equivalent to BQ25616 but charges according to JEITA vs HOT/COLD Both spins support 4.2V and 4.35V VBATREG, but BQ25616 also supports 4.1V VBATREG, while BQ25606 supports 4.4V VBATREG. BQ25616 has improved lower battery only leakage/discharge current (<10uA) compared to ~57uA battery discharge/leakage current of the BQ25606. + +Thank you very much. Now, seeing that you understand enough about charging, I take the opportunity to ask you: If my device is in an environment below 0ºC (therefore my battery also), will charging never start? + +Hi Gustavo, That's correct if you are using the temperature charging profile, as a TS fault would be detected and charging would be suspended. The temperature of the battery is sensed on the TS pin as a voltage, with the use of an external thermistor, so the resultant resistor divider on TS will change the voltage depending on the resistance of the thermistor (changes with temp, use NTC). If you do not want to use the HOT/COLD or JEITA functionality, you can tie the TS pin to a fixed DC voltage that corresponds to the normal temp range. This will always let you charge and essentially ignore temperature, but you lose the HOT/COLD, JEITA functionality. Note that you will have to check with battery vendor if this is a safe charging environment for the battery you use. + +Hi Gustavo: On page 4 of BQ25616 datasheet, there is device comparison table, which compares BQ25606, BQ25616 and BQ25616J. Regards, Hong + +Thank you very much Kedar :) + diff --git a/data/text/DLP4/900611 b/data/text/DLP4/900611 new file mode 100644 index 0000000000000000000000000000000000000000..9d943afc34763212341abc5fe442e795823342ee --- /dev/null +++ b/data/text/DLP4/900611 @@ -0,0 +1,6 @@ +mmWave usage around people. + +Is there any documentation that shows that mmWave is safe to use with people? I'm working on research project for mmWave and I need to have sort of documentation showing that it's safe to use around people. + +Adam, Please refer to section 7, "Regulatory Information" in the User's Guide for our AWR1642BOOST EVM. /lit/ug/swru508b/swru508b.pdf?ts=1588012115016 Regards, Kyle + diff --git a/data/text/DLP4/900617 b/data/text/DLP4/900617 new file mode 100644 index 0000000000000000000000000000000000000000..fa953bc2c64299dec9229570b17112a1da81e6c3 --- /dev/null +++ b/data/text/DLP4/900617 @@ -0,0 +1,6 @@ +LM53600-Q1: PLease provide FMEA for this device + +Part Number: LM53600-Q1 Please provide FMEA for this device. + +Hello Please find pin FMEA for LM53600 attached. Thank you LM53600_01_Q1Pin.FMEA.pdf + diff --git a/data/text/DLP4/900618 b/data/text/DLP4/900618 new file mode 100644 index 0000000000000000000000000000000000000000..9ceeeec757ba74aeea7a5a386e18546711b47e0f --- /dev/null +++ b/data/text/DLP4/900618 @@ -0,0 +1,10 @@ +Device to compete against MAX20047 + +Hi Team, Is there a device in our portfolio to compete against the MAX20047? Thanks, Jared + +Hi Jared, Currently, we do not have such device. We are in the process of spec'ing one. Can you provide more details on the exact application? Thanks. Jeff + +Hi Jeff, I cannot disclose specific details of the application on the forums. However, the system does have two USB ports that require charging capability. Would two TPS25840-Q1 devices do the trick? Thanks, Jared + +Hi Jared, I misread the datasheet. The MAX20047 is not a battery charger. It creates two "charging ports" from the auto battery, apparently. So, this would not be a BCP product. I suggest reposting to the product line that supports TPS25840. Regards, Jeff + diff --git a/data/text/DLP4/900622 b/data/text/DLP4/900622 new file mode 100644 index 0000000000000000000000000000000000000000..4632ded20ee0dd720cd9f92f75456e588dd7d68c --- /dev/null +++ b/data/text/DLP4/900622 @@ -0,0 +1,12 @@ +UCC28710: Hello, i'm trying to design buck converter with ucc28710 + +Part Number: UCC28710 oncompany web site i found a document about ucc28710 controller using as buck converter input 300 VDC output 22 VDC @ 250 mA. İ want to use this configuration but i need 22 VDC @ 1 Ampere İ modeled it on TINA spice analysis program it doesn't work properly. Attached file you can see reference document and TINA analysis model. Please let me know is it posible to get 22 VDC @ 1 ampere output converter.tidt015.pdf + +UCC2871x_TINA-TI_Buck_Converter.TSC + +7103.UCC2871x_TINA-TI_Buck_Converter.TSC + +Hello, I do have a question how did you select your buck inductor and at what switching frequency? This device has limitations on maximum duty cycle of less than 57.5% at the maximum switching. The magnetizing inductance should be selected on this based on minimum input and maximum frequency. Also your VS divider is controlling to 0.47V during the freewheeling period. I reviewed the schematic and your VS divider is not setup correctly for 22V VS will control to 4.06V during the freewheeling period. The other thing that could help is just evaluate with a DC input to start until you the simulation running. Regards, + +Hello, As i said i was just usecompany document pdf that is i sent you former mail. In that document it suggest it work at 22 VDC. Can you please send me a reference document to analyze this model. + diff --git a/data/text/DLP4/900642 b/data/text/DLP4/900642 new file mode 100644 index 0000000000000000000000000000000000000000..2c71b29204341a8a858a1e2a5544ed3cd2dd5465 --- /dev/null +++ b/data/text/DLP4/900642 @@ -0,0 +1,6 @@ +LM3478: Webench Flyback Simulation + +Part Number: LM3478 Hi, I’m trying to simulate the LM3478 in webench as a flyback converter. I can only seem to configure it as a boost converter. Can you tell me how to simulate the flyback functionality of it? I am reviewing a design and would like to confirm its operation. Thanks, Adam + +Hi Adam, You can build a model of the flyback converter using the LM3478 PSPICE transient model. In order to implement a coupled inductor, I would recommend putting the magnetizing inductance in parallel with a transformer that has the desired turn ratio. You can also refer to this application note to double check: /lit/an/snva761a/snva761a.pdf?ts=1588004708306 Thanks, Richard + diff --git a/data/text/DLP4/900658 b/data/text/DLP4/900658 new file mode 100644 index 0000000000000000000000000000000000000000..409341aa0eabd3545fe102a99b43f897dbb92054 --- /dev/null +++ b/data/text/DLP4/900658 @@ -0,0 +1,8 @@ +TPS62823: Short circuit between VIN and VSW + +Part Number: TPS62823 Hi, We're having some issues with a design with the TPS62823. Before the very first power on of a board, impedances seem to be ok, but after the first power on, a short has developed between the VIN and VSW pins of the TPS62823. I've removed the package from the board, and the short is internal to the IC. This is our schematic: Input voltage is 5.1V max. I believe the routing is fairly close to the recommendations as well: Any ideas how this failure can occur? Best regards, Jørgen + +Just to add one detail: The EN pin is sequenced by an LM3881, and is pulled up to 5V with a 100k resistor. Jørgen + +Hi again, Never mind! It turned out to be an assembly issue. The inductor was rotated 90 degrees, and shorted across the component footprint. Best regards, Jørgen +