This is one of the LED chip types.
Part Number : WS2812B
Function : Intelligent control LED integrated light source
Package : SMD 4 Pin
Manufacturers : Worldsemi ( http://www.world-semi.com/ )
See the preview image and the PDF file for more information.
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 amplification drive circuit.
Also include a precision internal oscillator and a 12V voltage programmable constant curre-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.
WS2812B Pinouts :
Features and Benefits
1. Intelligent reverse connect protection, the power supply reverse connection does not damage the IC.
2. The control circuit and the LED share the only power source.
3. Control circuit and RGB chip are integrated in a package of 5050 components, form a complete control of pixel point.
4. Built-in signal reshaping circuit, after wave reshaping to the next driver, ensure wave-form distortion not accumulate.
5. Built-in electric reset circuit and power lost reset circuit.
Other data sheets within the file : WS2812B