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WS2811 데이터시트 PDF




WorldSemi에서 제조한 전자 부품 WS2811은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


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부품번호 WS2811 기능
기능 Signal line 256 Gray level 3 channal Constant current LED drive IC
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WS2811 데이터시트, 핀배열, 회로
Free Datasheet http://www.datasheet4u.net/
WS2811
Signal line 256 Gray level 3 channal
Constant current LED drive IC
Feature
Applications
l Output port compression 12V.
l Built in stabilivolt, Only add a resistance to IC
VDD feet when under 24V power supply.
l Gray level 256 can be adjusted and scan freque
ncy not less than 400Hz/s.
l Built in signal reshaping circuit,after wave resha-
ping to the next driver, ensure wave-form distor-
tion not accumulate.
l Built-in electric reset circuit and power lost reset
circuit.
l Cascading port transmission signal by single lin-
e.
l Any two point the distance more than 10m tran-
smission signal without any increasecircuit.
l When the refresh rate is 30fps, low speedmodelc
ascade number are not less than 512 points, hig-
h speed mode not less than1024 points.
l Send data at speeds of up to 400 Kbps and 800
Kbps two patterns.
l LED decorative lighting.
l Indoor/outdoor LED video or irregular screen.
General description
The WS2811 is 3 output channels special for LED driver circuit. It internal include intelligent digital port
data latch and signal reshaping amplification drive circuit.Also include a precision internal oscillator and a 12V
voltage programmable constant current output drive. In the purpose of reduce power supply ripple, the 3 outp-
ut channels designed to delay turn-on function.
IC use single NZR communication mode.After the chip power-on reset, the DIN port receivedata from con
troller, the first IC collect initial 24bit data then sent to the internal data latch, theother data which reshaping
by the internal signal reshaping amplification circuit sent to the next cascade IC through the DO port. After
transmission for each chip,the signal to reduce 24bit. IC adopt auto reshaping transmit technology, making the
chip cascade number is not limited the signal transmission, only depend on the speed of signal transmission.
The data latch of IC depend on the received 24bit data produce different duty ratio signal at OUTR,
OUTG, OUTB port. All chip synchronous send the received data to each segment when the DIN port input a
reset signal. It will receive new data again After the reset signal finished. Before a new reset signal received,
the control signal of OUTR ,OUTG, OUTB port unchanged. IC sent PWM data that received justly to OUTR,
OUTG, OUTB port, after receive a low voltage reset signal the time retain over 50us. We offer two package
SOP8 and DIP8.
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WS2811 pdf, 반도체, 판매, 대치품
Free Datasheet http://www.datasheet4u.net/
WS2811
Signal line 256 Gray level 3 channal
Constant current LED drive IC
Sequence chart:
0 code
T0H
T0L
1 code
T1H
T1L
RET code
Treset
Cascade method:
D1 D2 D3 D4
DIN DO
DIN DO
DIN DO
IC 1 IC 2 IC 3
reset code
>=50us
reset
code
Data refresh cycle 1
seco n d
D1 first 24bit 24bit third 24bit
Data refresh cycle 2
first 24bit
seco n d
2 4 b it
third 24bit
D2
seco n d
24bit
third 24bit
seco n d
2 4 b it
third 24bit
D3
third 24bit
third 24bit
D4
Data transmission method:
Note: The data of D1 is send by MCU,and D2, D3, D4 through IC internal reshaping amplification to
transmit.
Composition of 24bit data:
R7 R6 R5 R4 R3 R2 R1 R0 G7 G6 G5 G4 G3 G2 G1 G0 B7 B6 B5 B4 B3 B2 B1 B0
Note: Follow the order of RGB to sent data and the high bit sent at first.
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WS2811 전자부품, 판매, 대치품
Free Datasheet http://www.datasheet4u.net/
WS2811
Signal line 256 Gray level 3 channal
Constant current LED drive IC
SOP-8 Package:
Symbol
A
A1
A2
b
c
D
E
E1
e
L
θ
Dimensions In Millmeters
Min Max
1.350
0.100
1.750
0.250
1.350
1.550
0.330
0.510
0.170
0.250
4.700
5.100
3.800
5.800
4.000
6.200
1.270
0.400
0º
1.270
8º
Dimensions In Inches
Min
0.053
0.004
0.053
Max
0.069
0.010
0.061
0.013
0.020
0.006
0.010
0.185
0.200
0.150
0.228
0.157
0.244
0.050
0.016
0º
0.050
8º
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