Industrial/Automotive
Product Guide
Part
NumberCell(s)Description

Package(s)Available(Lead-free)

Page
No.

16 QFN, SOP

5

Analog Front End (AFE)OZ9350

AFE with Cell Balance and I2CInterface

4-7 Cells

Battery Management Units (BMUs) and Gauges (with cell balance)
OZ890

High Power BMU

5-13 Cells

64 LQFP

6

OZ8920High Power BMU

5-8 Cells

48 LQFP

7

OZ8930High Power BMU

3-6 Cells

24 QFN,TSSOP

8OZ8940High Power BMU

6-12 Cells

32 LQFP9

OZ9310SBS Battery Gauge and Protection

3-4 Cells

40 QFN, 38
TSSOP

10

OZ9320/
OZ9324

SBS Battery Gauge and Protection

2 Cells

24 TSSOP/
30 TSSOP

11

OZ9313

Battery Gauge for High Power BMU

Any Cells

30 TSSOP

12

Cell Monitors, BMUs and Gauges (without cell balance)
OZ8800

Monitor and Secondary Protection

3-7 Cells

10 DFN

13

OZ8806

Monitor + High Accuracy Coulomb
Counter

1-2 Cells

10 QFN14

OZ8952

Low Cost Li-Ion BMU

3-4 Cells

16 SOP, SSOP

15

OZ8953

Low Cost Li-Ion BMU

5 Cells

16 SOP, SSOP

16

OZ8955

Low Cost Li-Ion BMU

3-5 Cells

16 SOP, SSOP

17

48 LQFP

18

Hybrid Electric Vehicle (HEV)/Electric Vehicle (EV)OZ8902

Stackable High Power BMU with
Cell Balance

12 Cells

DC/DC Converter Controllers

2

OZ8033

3A Low Dropout Linear Regulator

8 E-SOP

19

OZ8116/
OZ8138Single/Dual Ultra High Efficiency DC/DC

16 QFN/
24 QFN20

Industrial/Automotive
Product Guide
Part
NumberDescription

Package(s) Available(Lead-free)

Page
No.

LED Controller ICs for GENERAL LIGHTING Applications – NON-ISOLATEDOZ8022A/
OZ8022B/
OZ8022M

3-Step DimmingSOT-23-621

OZ8022THigh Power Factor, 3-Step
Dimming

16 QFN22

OZ8022V

High Power Factor

SOT-23-6

23

OZ8024

Continuous Dimming

16 QFN, 8 SOP

24

LED Controller ICs for GENERAL LIGHTING Applications – ISOLATED

3

OZ8027

High Power Factor

8 SOP

25

OZ8027A

High Power Factor, 3-Step
Dimming

8 SOP

26

OZ8023/OZ8025High Power Factor, 3-Step
Dimming for High Power
Applications

8 SOP/SOT-23-6

27

Industrial/Automotive Applications
Mission Statement
Lead the industry as the supplier of highly integrated and efficientIndustrial and Automotive solutions for battery and power management
in electronic products for the Computer, Consumer, Industrial,
Automotive, and Communications markets worldwide.

PRODUCTS
O2Micro’s Intelligent Power for Industrial and Automotive Application
products cross three IC categories – Battery, Power Management,
and Lighting.
Battery Management Unit (BMU)
products are highly integrated, mixed
signal ICs designed with Cool Battery
Technology®. BMUs provide next
generation, safe battery management.
DC/DC Controllers are PowerManagement ICs. Equipped with Constant-Ripple-Current®
technology, they are specially developed to design high efficiency
power supplies.
Lighting LED Drivers, part of theIntelligent Lighting family of ICs,
include patented Free Dimming™
technology for step dimming andcontinuous dimming control.

4OZ9350
FEATURES• Analog Front End (AFE) with Cell Balance and I2C communications with amicrocontroller• Input: 4–7 cells series connected; Lithium Ion (Li-Ion), Li-Polymer,
Phosphate and Lead acid (PbA) battery cells• Output: Multiplexes and level shifts individual cell, battery pack, and chipinternal temperature voltages to an analog output for a host microcontroller• I2C BUS serial communication with host microcontroller• Fast analog: Voltage output stable within 100μs after channel selection• Integrated reverse voltage protection (0.9V typical threshold) to prevent cell
damage• Integrated Under-Voltage Lockout (UVLO) protection• Integrated cell balance drivers eliminate external components• 3.3V LDO with 25mA output drive ability to power microcontroller• Integrated charge MOSFET driver (P-channel in high side or N-channel inlow side) and discharge N-channel MOSFET driver (low side)• Low power consumption modes: Full power < 80μA, Sleep < 10μA (5μA
typical value at 25°C), and Power down < 1μA (0.1μA typical value at 25°C)

GENERAL DESCRIPTIONOZ9350 is an AFE IC for 4-7 cell battery pack applications. It is designed towork with a host microcontroller and it’s Analog-to-Digital Converter (ADC).
OZ9350’s internal analog multiplexer level shifts and conditions the individual
cell voltages becoming a ground referenced signal, that a microcontroller candirectly measure, increasing accuracy, eliminating discrete components andsimplifying analog design.

APPLICATIONSAPPLICATION BLOCK DIAGRAM• Electric Bicycle• Power Tool
• Battery Backup System• Hybrid Vehicle• Portable Test Equipment• Medical System• Military Electronics

U.S. Patent #’s 7,642,750; 8,143,857; 8,143,863; and more patents pending.

5

OZ890FEATURES• High power BMU• Highly integrated battery pack monitor and protection- Li-Ion and Li-Polymer (Co, Mn and FeP chemistries) and NiMH battery cells- 5-13 cells standalone, and addressable up to 208 cells (16 BMU ICs)
- 5-13 voltage channels, 3 external temperature channels and 1 current
channel- Fully EEPROM programmable battery protection parameters- Built-in protection includes: over-voltage, under-voltage, over-current,
short circuit, over-temperature, under-temperature, cell unbalance, andpermanent failure• External and Internal cell balancing• Current measurement for coulomb counting with external microcontroller• Low power consumption

GENERAL DESCRIPTION
OZ890 is a highly integrated IC for battery pack protection and monitoring, used
to manage Li-Ion and Li-Polymer or Nickel Metal Hydride (NiMH) packs with
5-13 series cells.
With an integrated multi-channel, 16-bit Analog-to-Digital Converter (ADC),
OZ890 continuously monitors each cell voltage, charge current, discharge current and pack temperature to provide maximum battery safety. It also provides
a Permanent Failure function that will automatically assert a signal to blow an
external fuse to open the power line or to issue an alarm to the user in extreme
conditions.
OZ890 may be configured to work in standalone “hardware” mode or with amicrocontroller in “software” mode by configuring the EEPROM.

APPLICATIONS		APPLICATION DIAGRAM• Electric Bicycle• Electric Motorcycle• Power Tool
• Uninterruptable Power
Supply (UPS) Backup Battery• Electric Vehicle(EV/HEV/PHEV)

U.S. Patent #’s 6,744,394; 7,081,737; 7,161,520; 7,196,652; 7,352,155; 7,466,104; 7,629,771; 7,642,750; 7,679,324;
7,696,725; 7,701,177; 7,821,229; 7,973,514; 8,004,246; 8,030,895; 8,044,815; and more patents pending.

6

OZ8920FEATURES• High power BMU• Highly integrated battery pack monitor and protection- Li-Ion and Li-Polymer (Co, Mn and FeP chemistries) and NiMH battery cells- 5-8 cells standalone, and addressable up to 144 cells (16 BMU ICs)
- 5-8 voltage channels, 3 external temperature channels and 1 current
channel- Fully EEPROM programmable battery protection parameters- Built-in protection includes: over-voltage, under-voltage, over-current,
short circuit, over-temperature, under-temperature, cell unbalance, andpermanent failure• External and Internal cell balancing• Current measurement for coulomb counting with external microcontroller• Low power consumption

GENERAL DESCRIPTION
OZ8920 is a highly integrated IC for battery pack protection and monitoring,used to manage Li-Ion and Li-Polymer packs with 5-8 series cells.
With an integrated multi-channel 16-bit Analog-to-Digital Converter, OZ8920
continuously monitors each cell voltage, the charge current, discharge current and pack temperature to provide maximum battery safety. It also provides
a Permanent Failure function that will automatically assert a signal to blow an
external fuse to open the power line or to issue an alarm to the user in extreme
conditions.
OZ8920 may be configured to work in standalone “hardware” mode or with amicrocontroller in “software” mode by configuring the EEPROM.

APPLICATIONS		APPLICATION DIAGRAM• Electric Bicycle• Electric Motorcycle• Power Tool
• Energy Storage
System (ESS)/UPS
Backup Battery

U.S. Patent #’s 6,744,394; 7,081,737; 7,161,520; 7,196,652; 7,352,155; 7,466,104; 7,629,771; 7,642,750; 7,679,324;
7,696,725; 7,701,177; 7,821,229; 7,973,514; 8,004,246; 8,030,895; 8,044,815; and more patents pending.

7

OZ8930FEATURES• High power BMU• Highly integrated battery pack monitor and protection- Li-Ion and Li-Polymer, and Phosphate battery cells- 3-6 cells standalone- 3-6 voltage channels, 2 external temperature channels and 1 current
channel- JEITA standard compliant- Self-diagnostics- OTP programmable battery protection parameters- Built-in protection includes: over-voltage, under-voltage, over-current(COC, DOC0, DOC1), short circuit, over-temperature, under-temperature,cell unbalance, and permanent failure• Internal cell balancing• Current measurement for coulomb counting with external microcontroller• Low power consumption

GENERAL DESCRIPTION
OZ8930 is a highly integrated IC for battery pack protection and monitoring,used to manage Li-Ion and Li-Polymer packs with 3-6 series cells.
With an integrated multi-channel 14-bit Analog-to-Digital Converter, OZ8930
continuously monitors each cell voltage, charge current, discharge current andpack temperature to provide maximum battery safety. It also provides a Permanent Failure function that will automatically assert a signal to blow an externalfuse to open the power line or to issue an alarm to the user in extreme conditions.
OZ8930 may be configured to work in standalone “hardware” mode or witha microcontroller in “software” mode by configuring the OTP programmablememory.

APPLICATIONS		APPLICATION DIAGRAM• Power Tool
• Backup Power Supply

U.S. Patent #’s 6,744,394; 7,081,737; 7,161,520; 7,196,652; 7,352,155; 7,466,104; 7,629,771; 7,642,750; 7,696,725;
7,701,177; 7,821,229; 8,004,246; and more patents pending.

8

OZ8940FEATURES• High power BMU• Highly integrated battery pack monitor and protection- Li-Ion and Li-Polymer (Co, Mn and FeP chemistries), NiMH and Fuel cells- 6-12 cells standalone- 6-12 voltage channels, 2 external temperature channels- Fully programmable battery protection parameters- Built-in protection includes: over-voltage, under-voltage, over-current,
short circuit, over-temperature, under-temperature, cell unbalance, andpermanent failure• Internal cell balancing• Low power consumption

GENERAL DESCRIPTIONOZ8940 is a highly integrated IC for battery pack protection and monitoring,used to manage Li-Ion and Li-Polymer packs with 6-12 series cells.
With an integrated multi-channel 12-bit ADC, OZ8940 continuously monitors
each cell voltage and pack temperature to provide maximum battery safety. It
also provides a Permanent Failure function that will automatically assert a signal
to blow an external fuse to open the power line or to signal an alarm to the user.
OZ8940 may be configured to work in standalone “hardware” mode or with amicrocontroller in “software” mode by configuring the EEPROM.

APPLICATIONS		APPLICATION DIAGRAM• Electric Bicycle• Electric Motorcycle• Power Tool
• UPS Backup Battery• Electric Vehicle (EV/HEV/PHEV)• Fuel Cell

U.S. Patent #’s 6,744,394; 7,081,737; 7,161,520; 7,196,652; 7,352,155; 7,466,104; 7,629,771; 7,642,750; 7,696,725;
7,701,177; 7,821,229; 8,004,246; and more patents pending.

9

OZ9310FEATURES• Fully integrated, high accuracy battery gauge with protection functions for 3
and 4 cell Li-Ion and Li-Polymer batteries• Compliant with Smart Battery Specification (SBS) version 1.1, IEEE1625,
and JEITA• Supports Intel NVDC and CBB topology• Battery Gauge with hardware for impedance measurement• Measures charge current and discharge current with a dedicated 16-bit ADC• Monitors individual cell and terminal voltages with up to 15-bit resolution• Integrated cell balancing circuits and temperature sensor• Integrated, multiple-level cell protection includes: over-voltage, undervoltage, over-current, short circuit, over-temperature, under-temperature,cell unbalance, and permanent failure• Embedded flash program and data storage allows flexible support ofbattery changing• Integrated multi-GPIOs; 8-bit PWM with 2-bit pre-scalar (option); 10-bit
PDM controller; 3.3V and 1.8V voltage regulators; and pre-charge, charge
and discharge FET drivers• Low standby current: 20µA typical

GENERAL DESCRIPTIONOZ9310 is a highly integrated battery gauge and protection IC. It measures thestate-of-charge of a Li-Ion or Li-Polymer battery pack and its individual cellswith a highly accurate, low power battery gauge function.
The Battery Gauge software calibrates itself automatically and continuously,
without waiting for a full charge and discharge cycle to occur, significantly
increasing the reliability and accuracy of the battery pack.

APPLICATIONSAPPLICATION DIAGRAM• Notebook Computer• Portable Equipment• Test Equipment

U.S. Patent #’s 6,744,394; 7,081,737; 7,095,221; 7,161,520; 7,196,652; 7,589,499; 7,646,169; 7,667,435; 7,696,725;
8,004,246; 8,030,973; 8,169,249; and more patents pending.

10

OZ9320/9324
FEATURES• Fully integrated, high accuracy battery gauge with protection functions for
2-cell Li-Ion and Li-Polymer batteries• Compliant with SBS version 1.1, IEEE1625, and JEITA• Implements Intel NVDC and CBB topology• Battery Gauge with hardware for impedance detection• Measures charge current and discharge current with a dedicated 16-bit ADC• Monitors individual cell and terminal voltages with up to 15-bit resolution• Integrated cell balancing circuits and temperature sensor• Integrated, multiple-level cell protection includes: over-voltage, undervoltage, over-current, short circuit, over-temperature, under-temperature,cell unbalance, and permanent failure• Embedded flash program and data storage allows flexible support of batterychanging• OZ9320: Integrated multi-GPIOs; 8-bit Pulse Width Modulation (PWM) with
2-bit pre-scalar (option); 10-bit Pulse Density Modulation (PDM) controller;
3.3V and 1.8V voltage regulators; and pre-charge, charge/discharge FET
drivers• OZ9324: Integrated multi-GPIOs; 10-bit PDM controller; 3.3V and 1.8V
voltage regulators; and pre-charge, charge/discharge FET drivers• Low standby current: 20µA typical

GENERAL DESCRIPTIONOZ9320/24 are highly integrated battery gauge and protection ICs for 2-cell battery packs. Each measures the state-of-charge of a Li-Ion or Li-Polymer battery
pack and its individual cells with a highly accurate, low power battery gauge
function.
The Battery Gauge software calibrates itself automatically and continuously,
without waiting for a full charge and discharge cycle to occur, significantly increasing the reliability and accuracy of the battery pack.

APPLICATIONSAPPLICATION DIAGRAM• Netbook/Notebook Computer• Tablet PC• Digital Camcorder/Camera• Portable Equipment

U.S. Patent #’s 6,744,394; 7,081,737; 7,095,221; 7,161,520; 7,196,652; 7,589,499; 7,646,169; 7,667,435; 7,696,725;
8,004,246; 8,030,973; 8,169,249; and more patents pending.

11

OZ9313FEATURES• Integrated, 8-bit microcontroller with high performance and low power
consumption• Integrated, highly accurate ADC with different types of BMU ICs in a highpower battery, providing an accurate state-of-charge:- OZ890 +OZ9313: 5-13 cells- OZ8940 +OZ9313: 6-12 cells- OZ8920 +OZ9313: 5-8 cells		
- Stacked protection ICs + OZ9313• SBS version 1.1 compatible; and supports JEITA• Measures charge and discharge current with a dedicated 16-bit ADC• Monitors individual cell and terminal voltages, and external temperature from
BMU chips• Integrated internal temperature sensor• Programmed to scan BMU protection that includes: over-voltage, undervoltage, over-current, short circuit, over-temperature, and under-temperature• Embedded 64k bytes flash and 1k bytes SRAM to support a variety ofbattery characteristics in high power applications• Integrated 8-bit PWM with 2-bit pre-scalar; multi-GPIOs, 2 GPO; and 1.8V
voltage regulator• Full power and sleep modes; low sleep mode current < 10µA typical

GENERAL DESCRIPTIONOZ9313 is a highly accurate battery gauge designed to work with O2Micro’s highpower battery protection BMU ICs. It directly measures charge and discharge
current using its low power, sigma-delta ADC, resulting in accurate state-ofcharge information.
OZ9313, with proprietary battery gauge software, automatically self-calibrates
without waiting to complete a charge/discharge cycle, significantly increasing
the reliability and accuracy of a variety of high power battery packs.

APPLICATIONSAPPLICATION DIAGRAM• Electric Bicycle• Electric Motorcycle• Power Tool
• Backup Battery Pack

U.S. Patent #’s 6,744,394; 7,095,211; 7,161,520; 7,196,652; and more patents pending.

12

OZ8800
FEATURES• Battery monitor and secondary protection IC for 3-7 cell Li-Ion batteries• High accuracy Over-voltage (OV) protection• Low Active Power and Standby Current consumption• False trigger protection with user-configurable blanking delay• High current output driver for Power PMOS

GENERAL DESCRIPTION
OZ8800 maximizes battery pack safety with precision over-voltage detection for
3-7 cell Li-Ion battery packs.
An OV protection fault is indicated when a cell exceeds the user-set overvoltage threshold. If any one of the cells reach the OV threshold, a time delay
is started. Upon time-out, if the OV condition is still present, this fault condition
turns ON the external PMOS transistor (driven by the OUT pin) to isolate thepath between the charger and the battery, by opening a fuse.
OZ8800 has a user-configurable delay for over-voltage detection time. This
reduces false triggering and inadvertently blowing the Battery Pack protection
fuse.

APPLICATIONS		APPLICATION DIAGRAM• Power Tool
• UPS
• Electric Vehicle(LEV/EV/PHEV)

U.S. Patent #’s 7,683,577; 7,936,151; 7,999,554; and more patents pending.

13

OZ8806
FEATURES• Efficient Smart Phone battery monitor and high accuracy Coulomb Counterfor 1-2 cell batteries• Monitors:- Battery voltage- Temperature- Current for coulomb counting and battery gauge• Resides in either the Host or the Battery Pack
• I2C communication protocol• OCV (Open Circuit Voltage) detection when chip is in start-up and sleep
modes• Low power consumption

GENERAL DESCRIPTION
OZ8806 is a single cell battery monitor chip that works either in the battery packor host. It provides current-flow, voltage, and temperature measurement data to
support battery capacity monitoring in cost-sensitive applications.
Current measurement and coulomb counting is accomplished by monitoring
the voltage drop across an external sense resistor. Voltage measurement is accomplished through a separate voltage-sense input. Two GPIOs may be used todetect battery temperature or for other purposes.

APPLICATIONS		APPLICATION DIAGRAM• Netbook Computer• Tablet• Smart Phone• PDA• Cell Phone• Handheld Rechargeable
Battery

U.S. Patent #’s 6,744,394; 7,095,211; 7,161,520; 7,196,652; 7,218,083; 7,557,540; and more patents pending.

14

OZ8952
FEATURES• 3-4 Cell Monitor and Protection for Li-Ion, Li-Polymer, and Phosphatebatteries• High accuracy over-voltage and under-voltage monitor and protection• Built-in over-voltage, under-voltage, over-current, short circuit, overtemperature protection• Three-level, high accuracy over-current protection (DOC1, DOC2, SC)• Three modes for current fault release- Charger-in release- Load-open release- Timer release (optional)• Indicates OV (Over-voltage) and PF (Permanent Failure)• Low Power Consumption

GENERAL DESCRIPTIONOZ8952 is a highly integrated, low cost, battery pack protection and monitor IC
used to manage Li-Ion and Li-Polymer packs with 3-4 cells.
OZ8952 has high accuracy voltage detection. It uses lower resistance for current sense to reduce power dissipation, while maintaining high accuracy current
detection.

APPLICATIONS		APPLICATION DIAGRAM• Power Tool
• Notebook Computer• UPS• Remote Controlled
VehicleU.S. Patent #’s 7,965,061; 8,058,921; 8,076,959; 8,164,309; and more patents pending.

15

OZ8953
FEATURES• 5 Cell Monitor and Protection for Li-Ion, Li-Polymer, and Phosphate batteries• High accuracy over-voltage and under-voltage protection• Built-in over-voltage, under-voltage, over-current, short circuit, and overtemperature protection• Three-level, high accuracy over-current protection (DOC1, DOC2, SC)• Three modes for current fault release- Charger-in release- Load-open release- Timer release (optional)• Indicates OV (Over-voltage) and PF (Permanent Failure)• Low Power Consumption

GENERAL DESCRIPTIONOZ8953 is a highly integrated, low cost, battery pack protection and monitor IC
used to manage Li-Ion and Li-Polymer packs with 5 cells.
OZ8953 has high accuracy voltage detection. It uses lower resistance for current sense to reduce power dissipation, while maintaining high accuracy current
detection.

APPLICATIONS		APPLICATION DIAGRAM• Power Tool
• Notebook Computer• UPS• Remote Controlled Vehicle

U.S. Patent #’s 7,965,061; 8,058,921; 8,076,959; 8,164,309; and more patents pending.

16

OZ8955
FEATURES• Highly integrated 3-5 Cell Monitor and Protection circuit for Li-Ion and LiPolymer batteries• High accuracy fault protection, with time delay to prevent false trigger- Over-voltage and under-voltage detection- Over-temperature detection- Permanent fault protection- Charging permission check• Self-contained charge/discharge power path control with strong power
MOSFET drivers• Open cell tap and Load (OL) detection• Charger detection• Pre-charge enable• LED alarm indicator• Low power consumption

GENERAL DESCRIPTIONOZ8955 is a highly integrated, low cost, protection and monitoring IC for battery
packs with 3-5 Li-Ion or Li-Polymer cells.
One IC for 12V – 18V power tools results in one PCB design. No software
programming necessary, simply use O2Micro’s PC-based design tool to load parameters; quick easy design. Manufacturing line flexibility for running changes.

APPLICATIONS		APPLICATION DIAGRAM• Power Tool/Appliance• Notebook Computer• UPS• Remote Controlled
VehicleU.S. Patent #’s 7,965,061; 8,058,921; 8,076,959; and more patents pending.

17

OZ8902
FEATURES• Data acquisition for 6-12 cell battery packs using Li-Ion, Li-Polymer,
LiFePO4, and Nickel Metal Hydride (NiMH) battery cells; fuel cells, PbA
batteries, or ultra-capacitors• Compliant with ISO16949 standard• High accuracy cell voltage detection: <+15mV (-40 ~ 105oC)• 12-bit, multi-channel ADC• Trigger scan enables current and voltage measurement synchronization• Embedded, non-volatile memory• Cell integrated balance drivers with high drive capability• Integrated 5.0V voltage regulator• 8-wire SPI Vertical communication bus (V-SPI bus)
• 4-wire SPI Lateral bus (L-SPI bus) to communicate with any SPI bus device(e.g., active balance controller)• Broken cell tap connection detection• Low power modes: Scan, 5.2mA @ full speed [5ms scan cycle], Standby(60µA), and Power down (50µA)

GENERAL DESCRIPTION
OZ8902 is a data acquisition chip, designed for use in the battery management
systems of electric vehicle applications. It monitors the battery module cell voltages and temperatures.
OZ8902 uses Balancing on demand® to achieve cell balancing. Cell balancing iscontrolled by the host by setting the balance registers for cell voltage balance.
Cell balance ensures longer battery life.

APPLICATIONS		APPLICATION DIAGRAM• Electric Bicycle• Electric Motorcycle• UPS Backup Battery• Electric Vehicle(EV/HEV/PHEV)

U.S. Patent #’s 7,081,737; 7,352,155; 7,629,771; 7,679,324; 7,696,725; 7,796,069; 7,973,514; 8,004,246;
8,015,452; 8,022,669; 8,030,895; and more patents pending.

18

OZ8033
FEATURES• Ultra low dropout (LDO) regulator• 170mV dropout• 1.5% Accuracy over Line/Load/Temperature• Fast load Transient Response• Internal soft start function• Protection includes: Over-current (OCP), Output Under-voltage (UVP),
Under-voltage Lockout (UVLO) for VDDA and VIN, and Over-temperature (OTP)

GENERAL DESCRIPTION
OZ8033 is a fast, high current, and ultra low dropout (LDO) regulator designed
for DSP Core, front side bus VTT and other similar applications.
The device uses two power supplies: VIN and VDDA. VIN is the main supply
providing the output current; VDDA is an auxiliary supply for all other internal
circuitry. The voltages of both power supplies are internally monitored by the
Under-voltage Lockout circuitry, which disables the chip when any of these voltages is lower than the safe operation threshold.

APPLICATIONS		• Notebook Computer• Industrial Computer• Automotive Infotainment• FPGA• DSP Core and I/O Voltage• Front Side Bus VTT• Motherboard

U.S. Patent #8,143,872; and more patents pending.

19

APPLICATION DIAGRAM

OZ8116/8138
FEATURES• OZ8116: Single DC/DC SMPS controller with integrated drivers• OZ8138: Dual DC/DC SMPS controller with integrated drivers• Constant-Ripple-Current® control allows designing for optimum inductor size
• High efficiency up to 94%; High light load efficiency >85% at 100mA• VREF accuracy of 1.5%
• Input voltage from 3V to 25V; Output voltage adjustable from 0.5V to 2.75V• Output current – up to 15A• Output protection: latched over- and under-voltage, and over-current• Input protection: under-voltage lockout on VDDA and VIN• Soft start at start-up• Soft stop at shutdown

GENERAL DESCRIPTION
OZ8116/8138 are DC/DC Switched Mode Power Supply (SMPS) controllers
specially developed to provide power control for next generation microprocessors, their peripherals and chipsets.
These ICs step down the high battery voltage to low output voltages in therange of 0.5V to 2.75V. High efficiency, DC accuracy and excellent transient
response make OZ8116/8138 the perfect choice to supply low voltage CPU
peripherals, chipset cores, and graphics processors.

APPLICATIONS		APPLICATION DIAGRAMS• Power Supplies for Notebook
CPU, Microcontrollers andPeripherals• Industrial Computer• GPS

U.S. Patent #’s 6,844,710; 6,965,221; 7,098,642; 7,202,650; 7,466,113; 7,598,718; 7,816,896; and more patents pending.

20

OZ8022A/B/M
FEATURES• 3-level forward analog dimming control using a wall switch• Quasi-resonant converter controller for high-brightness LEDs
• Low start-up current and operating current, maximizing conversion
efficiency• Peak current-mode control simplifies circuit design• Under-voltage lockout with hysteresis• Minimum off-time control for light-load operation, maximizing efficiency• Provides complete protection functions:- OZ8022A/B: Maximum gate drive output at 19.5V- OZ8022M: Maximum gate drive output clamp- Over-voltage for IC bias voltage- Cycle-by-cycle current limit- LED short circuit; output over-voltage; and internal over-temperature

GENERAL DESCRIPTIONThe OZ8022A/B/M are controllers for Buck converters that use quasi-resonant
conversion technology. Each can be used to drive high-brightness LEDs in offline applications.
OZ8022A/B/M provide proprietary patented Free Dimming™ technology tocontrol LED brightness using an ON/OFF wall switch.

APPLICATIONS		APPLICATION DIAGRAM• LED Driver

U.S. Patent #’s 8,044,608; 8,076,867; and more patents pending.

21

OZ8022T
FEATURES• 3-level analog dimming control using a wall switch• Quasi-resonant converter controller for high-brightness LEDs
• Built-in high-voltage startup circuit• Under-voltage lockout with hysteresis• Minimum off-time control for light-load operation, maximizing efficiency• Provides complete protection functions:- Maximum gate drive output clamp- Over-voltage for IC bias voltage- Cycle-by-cycle current limit- LED short circuit; output over-voltage; and internal over-temperature

GENERAL DESCRIPTIONThe OZ8022T is a controller for Buck converters that uses quasi-resonant conversion technology. It can be used to provide regulated current for high-brightness LEDs, with power factor correction, in offline applications.
OZ8022T provides proprietary patented Free Dimming technology to control
LED brightness using an ON/OFF wall switch.

APPLICATIONS		• LED Driver

U.S. Patent #8,044,608; and more patents pending.

22

APPLICATION DIAGRAM

OZ8022VFEATURES• Quasi-resonant converter controller for high-brightness LEDs
• Supports high power factor for LED lighting applications• Low start-up current and operating current, maximizing conversion efficiency• Voltage-mode control simplifies circuit design• Under-voltage lockout with hysteresis• Minimum off-time control for light-load operation, maximizing efficiency• Provides complete protection functions:- Maximum gate drive output clamp- Over-voltage for IC bias voltage- Cycle-by-cycle current limit- LED short circuit; output over-voltage; and internal over-temperature

GENERAL DESCRIPTIONThe OZ8022V is a controller for Buck converters that uses quasi-resonant conversion technology. It can be used to drive high-brightness LEDs, with power
factor correction, in offline applications. The Buck converter operates between
the continuous and discontinuous mode of inductor current.

APPLICATIONS		APPLICATION DIAGRAM• LED Driver

U.S. Patent #’s 8,044,608; 8,076,867; and more patents pending.

23

OZ8024
FEATURES• Proprietary continuous PWM dimming technology using a wall switch• Quasi-resonant converter controller for high-brightness LEDs
• Low stand-by and operating current• Peak current-mode control simplifies circuit design• Under-voltage lockout with hysteresis• Minimum off-time control at high-input voltage operation condition• Provides complete protection functions:- Maximum gate drive output- Over-voltage for IC bias voltage- Cycle-by-cycle current limit- LED short circuit; output over-voltage; and internal over-temperature

GENERAL DESCRIPTIONThe OZ8024 is a controller for Buck converters that uses quasi-resonant conversion technology to provide regulated power for high-brightness LEDs in offline
applications.
It provides a patented technology to control LED brightness using an ON/OFF
wall switch. End-users can simply select a desired LED brightness.

APPLICATIONS		APPLICATION DIAGRAM• LED Driver

U.S. Patent #’s 8,044,608; 8,076,867; and more patents pending.

24

OZ8027
FEATURES• Primary side control, AC/DC converter controller• High power factor with wide range input voltage• Constant current output• Fixed operation frequency• Built-in high-voltage startup circuit• Compatible with neon indicators in wall switch• Provides complete protection functions:- VDD over-voltage- VDD under-voltage lockout with hysteresis- Open and Short LED- Primary side cycle-by-cycle current limit- Maximum gate drive output clamp- Over-temperature

GENERAL DESCRIPTIONThe OZ8027 is a primary side control, LED driver controller. It can be used inhigh power factor AC/DC converter applications.
OZ8027 works with neon indicators in a traditional wall switch, without interference.

APPLICATIONS		• LED Lighting

Patents pending.

25

APPLICATION DIAGRAM

OZ8027AFEATURES• Primary side control, AC/DC converter controller• High power factor with wide range input voltage• Constant current output• 3-level analog dimming control using a wall switch• Fixed operation frequency• Built-in high-voltage startup circuit• Compatible with neon indicators in wall switch• Provides complete protection functions:- VDD over-voltage- VDD under-voltage lockout with hysteresis- Open and Short LED- Primary side cycle-by-cycle current limit- Maximum gate drive output clamp- Over-temperature

GENERAL DESCRIPTIONThe OZ8027A is a primary side control, LED driver controller. It can be used inhigh power factor AC/DC converter applications.
OZ8027A works with neon indicators in a traditional wall switch, without
interference.

APPLICATIONS		APPLICATION DIAGRAM• LED Lighting

U.S. Patent #’s 8,044,608; 8,076,867; and more patents pending.

26

OZ8023/8025
FEATURES – OZ8023

FEATURES – OZ8025• Quasi-resonant converter controller• Built-in high-voltage startup circuit• Voltage-mode control simplifies circuitdesign• Under-voltage lockout with hysteresis• Minimum off-time control for light-load
operation, maximizing efficiency• Excellent line-voltage regulation• Provides complete protection
functions:- Clamped gate drive output- Over-voltage for IC bias voltage- Cycle-by-cycle current limit- Output short circuit; over load;
output over-voltage; and internal
over-temperature• Secondary side LED controller• 3-level analog dimming control
using a wall switch• Low operating current• Provides complete protection
functions:- VDD over-voltage- Output over-voltage- Internal over-temperature

GENERAL DESCRIPTIONThe OZ8023 is a voltage-mode, quasi-resonant converter controller, suitable foroffline, AC/DC flyback converter applications. It can be used as a single-stage
power factor correction controller for an isolated power supply or LED driverapplications.
The OZ8025 is a controller for an isolated LED driver application. It provides a
proprietary 3-level dimming control to LEDs using an ON/OFF wall switch.

APPLICATIONS		• Isolated LED Driver		

U.S. Patent #8,044,608; and more patents pending.

27

APPLICATION DIAGRAMOZ8023/8025

Company Background
Founded in April 1995, O2Micro® International Limited(NASDAQ: OIIM) designs, develops and markets innovative
power management and e-commerce components
for the Computer, Consumer, Industrial/Automotive, andCommunications markets.

O2Micro maintains an extensive portfolio of intellectual
property, and has numerous Trademark Applications and
Copyright Registrations.

The company’s extensive list of customers includes many of
the world’s leading electronics manufacturers.

For additional information, including sales office locations,please visit the O2Micro web site at www.o2micro.com.

Copyright © 2012-13 by O2Micro. All rights reserved.
PO2WER, the O2Micro logo, O2Micro, Cool Battery Technology, Constant-RippleCurrent, Balancing on demand, and combinations thereof are registered trademarks of
O2Micro. Free Dimming and combinations thereof are trademarks of O2Micro.
All other trademarks are the property of their respective owners.

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