WS2815B

Intelligent control LED
integrated light sourceFeatures and Benefits


The control circuit and RGB chip are integrated in a 5050 components, to form an external control pixel.
12V DC power supply, can effectively reduce the operating current of the pixel LED, and decrease the voltage-dropof the PCB, this is to advance the consistency of the mixed lights for long-distance transmission.
Using the built-in signal reshaping circuit to achieve the signal waveform shaping, and no distortion of waveform ofsignal takes place.
The gray levels of each pixel are of 256 levels, which achieves “256*256*256=16777216” full-color display, andthe refresh frequency reaches to 2KHz.
Serial cascade interface, data receiving and decoding depend on just one signal line.
Dual-signal wires version, signal break-point continuous transmission.
Any two point the distance more than 5M transmission signal without any increase circuit.
When the refresh rate is 30fps, cascade numbers is at least 1024 pixels.
Data transmitting at speeds of up to 800Kbps.
Good color consistency reliability, high cost-effective.

ApplicationsGuardrail tube series, point light display series, flexible/rigid strips series, module series applications.
Lighting stage costumes, innovative gadgets or any other electronic products.

General description
WS2815B is an intelligent control LED light source that the control circuit and RGB chip are integrated in a packageof 5050 components. Its internal includes intelligent digital port data latch and signal reshaping amplification drive
circuit.
Dual-signal wires version, signal break-point continuous transmission. Any pixel’s failure won't affect signal transfer
and total emitting effect.
The data transfer protocol use single NZR communication mode. After the pixel power-on reset, the DIN port receive
data from controller, the first pixel collect initial 24bit data then sent to the internal data latch, the other data which
reshaping by the internal signal reshaping amplification circuit sent to the next cascade pixel through the DO port. Aftertransmission for each pixel, the signal to reduce 24bit. Every pixel adopts auto-reshaping transmit technology, making
the pixel cascade numbers are not limited to the signal transmission, only relate to the speed of signal transmission.
The BIN receives the data signal, and then compare the data with the DIN side after phagocytosis of 24bit data, if DIN
do NOT receive the signal, then switching to BIN for receiving the input signal, which ensure that any the IC's damage
does not affect the signal cascade transmission and make the BIN in state of receiving signal until restart after power-off.
Refresh Frequency updates to 2KHz, Low Frame Frequency and no Flicker appear in HD Video Camera.
RESET time>280μs, it won’t cause wrong reset while interruption, it supports the lower frequency and inexpensive
MCU.

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WS2815B

Intelligent control LED
integrated light source
Mechanical Dimensions

PIN Configuration

PIN Function
NO.

SymbolPIN

Function description

1VCC

VCC

IC POWER SUPPLY, Suspended or connected with a filter capacitor to GND

2VDD

VDD

LED POWER SUPPLY, connect to “+12V”

3DO

DO

Control data signal output

4DIN

DIN

Control data signal input

5GND

GND

Data & Power Grounding

6BIN

BIN

Backup Control data signal input

Absolute Maximum Ratings
Parameter

SymbolRatings

Unit

Power supply voltage

VDD+9.5~+13.5

V

Logic input high voltage

VI

3.7-5.3

V

Operating TemperatureTopt-25～+85℃

Storage Temperature

Tstg-40~+105℃

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Intelligent control LED
integrated light source
Electrical Characteristics (TA=-20～+70℃, VDD=4.5～5.5V, VSS=0V)
Parameter

Symbol

Min.

Tpy.

Max.

Unit

Conditions

Input Current

II——

——

±1µA

VI=VDD/VSS

High-level Input

VIH

0.7VDD————V

DIN, SET

Low-level Input

VIL——

——

0.3 VCCV

DIN, SETHysteresis voltage

VH

——

0.35

——

V

DIN, SET

Switching Characteristics (TA=-20～+70℃, VDD=4.5～5.5V, VSS=0V)
Parameter

Symbol

Min

Tpy

Max

UnitCondition

Transmission Delay Time

tPLZ

——

——

300

ns

CL=15pF, DIN→DOUT, RL=10KΩ

Fall time

tTHZ

——

——

120µs

CL=300pF, OUTR/OUTG/OUTB

Input-capacitance

CI

——

——

15pF

——

LED Characteristics
Ref. Value
Quiescent Current

2.1mA

RGB Channel Constant Current

10mA

RED Brightness (Central Value)300-600mcd

GREEN Brightness (Central Value)

1500-2500mcd

BLUE Brightness (Central Value)150-400mcd

RED Wavelength620-625nm

GREEN Wavelength515-525nm

BLUE Wavelength465-475nm

Data Transfer Time
T0H0-code, High-level time

220ns~380ns

T1H

1-code, High-level time

580ns~1.6µs

T0L

0-code, Low-level time

580ns~1.6µs

T1L

1-code, Low-level time

220ns~420ns

RES

Frame unit, Low-level time

> 280µs

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Intelligent control LED
integrated light source
Sequence chart
0 code1 codeCascade method
T0L

T0H

D1

T1L
T1H

D2

PIX1

TresetRET code

DIN DODIN DO

D3PIX2DIN DO

D4PIX3

Data Transmission Method

Note: D1 is the data from MCU, and D2, D3, D4 are from Cascade Circuits.
Composition of 24bit data
G7G6G5G4G3G2G1G0R7R6R5R4R3R2R1R0

B7

B6B5

B4B3B2

B1

B0

Note: Data transmit in order of GRB, high bit data is first.
Typical application circuit
1.

Recommended application circuit

Remarks: C1 is bypass filter capacitor.
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WS2815B

Intelligent control LED
integrated light source2.

For complicated wiring & space-savingPacking StandardCarrier

tape

Packing: 1K/Reel: 167*12mm
4.5K/Reel: 327*12mm

Anti-static bag

Product LabelThe foam protective layer

Guard against damp/ Keep dry

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WS2815B

Intelligent control LED
integrated light source
Top SMD LED Using Instructions
1.

Summary

To make the best use of WORLDSEMI’s LED, please refer to the below precautions, they are of same usage
method as other electronic components.
2.

Cautions

2.1. Dust & Cleaning
The surface of the LED is encapsulated with modified epoxy resin because it plays a very good role in protecting
the optical performance and aging resistance. The modified epoxy resin is easy to stick with dust and must be kept
clean. When there’s a certain amount of dust on the surface of the LED, it won’t affect brightness, but dust proof
should be taken care of. Promoting the use of unsealed package in preference to others and the assembled LEDs
should be placed in a clean container.
Avoid using the organic solvents to clean the dust on the LED surface and it’s necessary to confirm whether thecleaning fluid will dissolve the LED.
Do not clean the LEDs by the ultrasonic. Some parameters affecting the LED performance must be evaluated if
have no alternative but to the ultrasonic cleaning method, such as ultrasonic power, baking time and assembly
conditions, etc.
2.2. Moisture-proof packaging
TOP SMD LEDs are moisture sensitive components. LEDs are packaged in aluminum foil bag to prevent thefrom absorbing moisture during transport and storage. A desiccant is placed in the bags to absorb moisture. If theLED absorbs moisture, then it evaporates and expands when in reflow process, which may break the colloid fromthe bracket and damage the optical performance of LED. For this reason, moisture-proof packaging is to prevent thefrom absorbing moisture during transport and storage. The moisture resistance rating of WORLDSEMI’s LED is:
LEVEL 6.
Tabel I - IPC/JEDEC J-STD-020 Moisture/Reflow Sensitivity Classification
MSL Level
LEVEL1LEVEL2LEVEL2aLEVEL3
LEVEL4LEVEL5LEVEL5aLEVEL6

Workshop LifeConditions≤30℃/85%RH≤30℃/60%RH≤30℃/60%RH≤30℃/60%RH≤30℃160%RH≤30℃/60%RH≤30℃/60%RH
Take-out and Use immediately≤30℃/60%RH
Time
Unlimited
1 Year
4 Weeks
168 Hours
72 Hours
48 Hours
24 Hours

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Intelligent control LED
integrated light source
2.3. Storage and Duration
a.
b.
c.

Room temperature sealed storage: 20℃～30℃, 40%～60%RH, product is valid for THREE months.
Moisture-proof sealed storage: 20℃～30℃, 25%～60%RH, product is valid for SIX months.
Use up with 4 hours after removing from packages. (Environmental conditions for temperature <30℃,relative humidity<60%)

2.4. Dehumidification Operation
We would recommend to do dehumidification if they exceed the valid storage period of products or dampened due
to other reasons. Requirement: 75℃/>24H.

3.

Management of secondary SMT process

It’s necessary to do moisture-proof treatment when the secondary reflow carried out that followed the first reflow.
It can’t be more than 2 hours to be exposed at condition of “<30℃/60%RH” and dehumification operation isrequested for a longer interval reflow. For instance, place in a drying box or a container with desiccant, anddehumidify it before the secondary reflow(Low temperature baking operation: 70℃-75℃, ≥12 hours).
4.

SMT Reflow

Refer to the parameters listed below, the experimental results prove that the TOP SMD LED meets the JEDEC
J-STD-020C standards. As a general guideline, it is recommended to follow the SMT reflow temperature curverecommended by the solder paste manufacturer.
Curve Description

Lead-freeThe lowest preheat temperature (Tsmin)

Reflow
150℃

The highest preheat temperature (Tsmax)

200℃

Preheating time (Tsmin to Tsmax) (ts)60-180 S

Average rate of temperature rise (Tsmax to Tp)<3℃/S

LIQUID REGION temperature (TL)

217℃

LIQUID REGION Holding Time (tL)

60-150 S

Peak Temperature (Tp)

240℃High Temperature Region(Tp=-5℃) Holding<10 STime(tp)RateCooling<6℃/S

Room Temperature to Peak Holding Time

<6 minRemarks: 1. These general guidelines may not apply to all PCB designs and reflow soldering configurations.
2. All temperatures referred are measured on the surface of the package body.
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5.

Intelligent control LED
integrated light source

Assembly Precautions
1. Clip the LED from its side.

2. Neither directly touch the gel surface with the handor sharp instrument, it may damage its internal circuit.

3. Not to be double stacked, it may damage its

4. Can not be stored in or applied in the acidic sites ofinternal circuit.

PH<7.

Modify Records
Version №

Status Bar

Modify Content Summary

Date

ReviserApproved

V1.0

NNew

20180820

Shen JinGuo

Yin HuaPing

Remarks: Initial version: V1.0；Version number plus "0.1" after each revision；
Status bar: N--New, A--Add, M--Modify, D--Delete.

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