WS2812B
Intelligent control LED
Worldsemi 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 800K bps.
The color of the light were highly consistent, cost-effective..
Applications
e@ 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
: Intelligent control LED Worldsemi integrated light source
Mechanical Dimensions
PCB Solder Pad LED Solder Pac
4.2
ra
Top View Back View
Solder Pad
PIN configuration
3
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inod
PIN function NO. | Symbol Function description 1 VDD Power supply LED 2 DOUT | Control data signal output 3 VSS Ground 4 DIN Control data signal input Absolute Maximum Ratings Prameter Symbol Ratings Unit Power supply voltage Vpp 43,5~4+5.3 Vv Input voltage Vi -0.5~VDD+40.5 Vv Operation junction Topt -25~ 480 °C temperature Storage temperature range Tstg -40~+105 °C
Electrical Characteristics (T,=20~+70°C, Vpp=4.5~5.5V,Vss=0V,unless otherwise specified)
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WS2812B
Intelligent control LED
Worldsemi integrated light source Prameter Smybol conditions Min | Tpy Max Unit Input current I; Vi=Vpp/Vss — — +1 pA Vin Diy, SET 0.7Vpp | —— — V Input voltage level Vit Diy, SET — | — | 03Vpp V Hysteresis voltage Vu Diy,» SET — 0.35 — Vv
Switching characteristics (T,=-20~+70°C, Vpp=4.5~5.5V,Vss=0V,unless otherwise specified)
Prameter Symbol Condition Min | Tpy Max Unit T ission del: CL=15pF,DIN Tansmnission elay tex pF, -> 300 ns time DOUT,RL=10KQ CL=300pFOUTR/OU Fall ti t — — 120 me THZ | TG/OUTB Bs Input capcity Cy — — — 15 pF
RGBIC characteristic parameter
Emitting color Model Wavelength(nm) Luminous intensity(mcd) Voltage(V ) Red 13CBAUP 620-625 390-420 2.0-2.2 Green 13CGAUP 522-525 660-720 3.0-3.4 Blue 10RIMUX 465-467 180-200 3.0-3.4
Data transfer time( TH+TL=1.25ys+600ns)
TOH 0 code ,high voltage time 0.4us +150ns T1H 1 code ,high voltage time 0.8us +150ns TOL 0 code , low voltage time 0.85us +150ns TIL 1 code ,low voltage time 0.45us +150ns RES low voltage time Above 50us
Sequence chart:
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WS2812B
Intelligent control LED
Worldsemi integrated light source
TOL 0 code TOH
1 code Tb
T1H
Cascade method:
Data transmission method :
reset code >=50us reset code
Datarefresh cycle 1 Data refresh cycle 2
D1_ |first 24bit i i first 24bit
second |tnird 24bi second |tnird 24bi D2 24bit 24bit D3 hird 24bif [rnira 2abil
D4
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WS2812B
Intelligent control LED
Worldsemi 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 | GO | R7 | R6 | RS | R4 | R3 | R2 | R1 | RO | B7 | B6 | BS | B4 | B3 | B2 | B1
Note: Follow the order of GRB to sent data and the high bit sent at first. Typical application circuit:
WS2812B
= WS2812B
= WS2812B