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WS2812B英文手册(WS2812B_datasheet_EN).pdf
WS2812B LED
Intelligent control LED integrated light source
WORLDSEMI CO.,LIMITED
WS2812B Datasheet and Specifications
Intelligent control LED integrated light source
Jan,2016
V1.0
1/9
WS2812B LED
Intelligent control LED integrated light source
Features and Benefits
Intelligent reverse connect protection, the power supply reverse connection does not damage the IC.
The control circuit and the LED share the only power source.
Control circuit and RGB chip are integrated in a package of 5050 components, form a complete control of pixel
point.
Built-in signal reshaping circuit, after wave reshaping to the next driver, ensure wave-form distortion not
accumulate.
Built-in electric reset circuit and power lost reset circuit.
Each pixel of the three primary color can achieve 256 brightness display, completed 16777216 color full color
display, and scan frequency not less than 400Hz/s.
Cascading port transmission signal by single line.
Any two point the distance more than 5m transmission signal without any increase circuit.
When the refresh rate is 30fps, cascade number are not less than1024 points.
Send data at speeds of 800Kbps.
The color of the light were highly consistent, cost-effective..
Applications
Full-color module, Full color soft lights a lamp strip.
LED decorative lighting, Indoor/outdoor LED video irregular screen.
General description
WS2812B is a intelligent control LED light source that the control circuit and RGB chip are integrated in
a package of 5050 components. It internal include intelligent digital port data latch and signal reshaping ampli
fication drive circuit. Also include a precision internal oscillator and a 12V voltage programmable constant curr
e-nt control part, effectively ensuring the pixel point light color height consistent.
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. After transmission for each pixel，the signal to reduce 24bit. pixel adopt auto resha
-ping transmit technology, making the pixel cascade number is not limited the signal transmission, only depend
on the speed of signal transmission.
LED with low driving voltage, environmental protection and energy saving, high brightness, scattering angl
e is large, good consistency, low power, long life and other advantages. The control chip integrated in LED
above becoming more simple circuit, small volume, convenient installation.
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WS2812B LED
Intelligent control LED integrated light source
Mechanical Dimensions
PIN configuration
PIN function
NO.
1
Symbol
VDD
Function description
Power supply LED
2
3
4
DOUT
Control data signal output
VSS
DIN
Ground
Control data signal input
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WS2812B LED
Intelligent control LED integrated light source
Absolute Maximum Ratings
Prameter
Symbol
Power supply voltage
Input voltage
Operation junction
temperature
Storage temperature range
VDD
VI
Topt
Tstg
Ratings
+3.5~+5.3
-0.5～VDD+0.5
-25～+80
-40~+105
Unit
V
V
℃
℃
Electrical Characteristics（TA=-20～+70℃，VDD=4.5～5.5V,VSS=0V,unless otherwise specified）
Prameter
Input current
Input voltage level
Hysteresis voltage
Smybol
II
VIH
VIL
VH
conditions
VI=VDD/VSS
DIN，SET
DIN，SET
DIN，SET
Min
——
Tpy
——
0.7VDD ——
——
——
——
0.35
Max
±1
——
0.3 VDD
——
Unit
µA
V
V
V
Switching characteristics（TA=-20～+70℃，VDD=4.5～5.5V,VSS=0V,unless otherwise specified）
Prameter
Symbol
Condition
Min
Tpy
Max
Unit
Transmission delay
time
Fall time
Input capcity
tPLZ
tTHZ
CI
CL=15pF,DIN→
DOUT,RL=10KΩ
CL=300pF,OUTR/OU
TG/OUTB
——
——
——
——
——
——
——
300
120
15
ns
µs
pF
RGB IC characteristic parameter
Emitting color
Model
Wavelength(nm)
Luminous intensity(mcd)
Voltage(V)
Red
Green
Blue
13CBAUP
13CGAUP
10R1MUX
620-630
515-530
465-475
550-700
1100-1400
200-400
1.8-2.2
3.0-3.2
3.0-3.4
4/9
WS2812B LED
Intelligent control LED integrated light source
Data transfer time( TH+TL=1.25µs±600ns)
0 code ,high voltage time
T0H
1 code ,high voltage time
0 code , low voltage time
1 code ,low voltage time
0.4us
0.85us
0.85us
0.4us
±150ns
±150ns
±150ns
±150ns
T1H
T0L
T1L
RES
Sequence chart:
0 code
T0H
1 code
RET code
Cascade method:
D1
D2
DIN
DO
PIX1
low voltage time
Above 50µs
T0L
T1L
T1H
Treset
D4
D3
DIN
DO
PIX3
DIN
DO
PIX2
5/9
WS2812B LED
Intelligent control LED integrated light source
Data transmission method：
reset code
>=50us
reset
code
Data refresh cycle 1
Data refresh cycle 2
D1
first 24bit
second
24bit
third 24bit
first 24bit
second
24bit
third 24bit
second
24bit
third 24bit
second
24bit
third 24bit
third 24bit
third 24bit
D2
D3
D4
6/9
WS2812B LED
Intelligent control LED integrated light source
Note: The data of D1 is send by MCU,and D2, D3, D4 through pixel internal reshaping amplification to
transmit.
Composition of 24bit data:
G7 G6 G5 G4 G3 G2 G1 G0 R7 R6 R5 R4 R3 R2 R1 R0 B7 B6 B5 B4 B3 B2 B1 B0
Note: Follow the order of GRB to sent data and the high bit sent at first.
Typical application circuit:
5V
C1
104
5V
C2
104
5V
1
2
1
2
1
C1
104
2
DOUT
U1
VDD
DIN
DOUT
VSS
WS2812B
U2
VDD
DIN
DOUT
VSS
WS2812B
U1
VDD
DIN
DOUT
VSS
WS2812B
4
DIN
3
4
3
4
3
7/9
2
3
WS2812B LED
Intelligent control LED integrated light source
WS2812B Products Using Instructions
MSL=5A Level
1. Purpose：
WS2812B-Mini LED lamp’s surface use the high hardness silicone resin,can ensure that no
matter customers use PU glue or epoxy resin to do the silicone drop rubber
processing,won’t lead the LED to die;also has a very good anti sulfide capacity. Good
compatibility with bracket, but the silicon resin has a higher requirements on the humidity
and dehumidification process, especially pay attention during wet season,ensure the
production safety.
2. Transport and application area：
All WS2812S/B products during the transportation process, need to maintain a positive
upward, moisture-proof, during the transport process,shall avoid the extrusion, collision
and vibration.
3. Product storage and deadline：
Sealed storage at room temperature: 20 ℃ ~ 30 ℃, 40% ~ 60%RH, the product is valid
for 3 months;
Moisture seal storage: 20 ℃ ~ 30 ℃, 25% ~ 60%RH, the product is valid for 6 months;
After opening the product packaging , suggest using them within 1 hours,(environmental
conditions of temperature <30 ℃, humidity <60%).
4. Dehumidification process:
LED products which is beyond the prescribed time limit,or for getting damp for some other
reasons,we recommend the customer first do the dehumidification process,then use
them.Dehumidification method:under 75 ℃ / 22 ±2 hours.
5. Electrostatic protection:
LED is the electrostatic sensitive devices, although the LED product has excellent
anti-static ability, but after each ESD impact, will cause a certain degree of damage to LED.
Thus in using process of LED products, must do the electrostatic protection measures, such
as anti-static gloves, anti-static Bracelet etc..
6. Manual welding operation instruction
Suggest using the Electric soldering iron whose power is less than 30W, then control the
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