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WS2811

WorldSemi
Part Number WS2811
Manufacturer WorldSemi
Description Signal line 256 Gray level 3 channal Constant current LED driver
Published Feb 11, 2014
Detailed Description WS2811 Signal line 256 Gray level 3 channel Constant current LED driver IC Feature  Output port compression 12V.  B...
Datasheet PDF File WS2811 PDF File

WS2811
WS2811

Overview
WS2811 Signal line 256 Gray level 3 channel Constant current LED driver IC Feature  Output port compression 12V.
 Built-in voltage-regulator tube, only a resistance needed to add to IC VDD feet when under 24V Applications  LED decorative lighting.
 Indoor/outdoor LED video or irregular screen.
power supply.
 256 Gray-scale adjustable and scan frequency is more than 2KHz.
 Built in signal reshaping circuit, to ensure waveform distortion do not accumulate after wave reshaping to the next driver  Built-in electrify reset circuit and power-down reset circuit.
 Cascading port transmission signal by single line.
 Any two point the distance less than 5 Meters transmission signal without any increase circuit.
 When the refresh rate is 30fps, the cascade number is at least 1024 pixels.
 Send data at speed of 800Kbps.
General description The WS2811 is 3 output channels special for LED driver circuit.
Its internal includes 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 output channels designed to delay turn-on function.
IC use single NZR communication mode.
After the chip power-on reset, the DIN port receive data from controller, the first IC 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 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 ...


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