WS2812B Addressable RGB LED: Datasheet, Pinout and Applications

WS2812B Pinout

Symbol

Symbol

Footprint

Footprint

3D Model

3D Model

WS2812B is an intelligent control LED light source that the control circuit and RGB chip are integrated into a package of 505 components. It internal includes an intelligent digital port data latch and signal reshaping amplification drive circuit. Also include a precision internal oscillator and a 12V voltage programmable constant current control part, effectively ensuring the pixel point light color height consistent.

• Intelligent reverse connects 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 into 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 does not accumulate. 

• Built-in electric reset circuit and power lost reset circuit. 

• Each pixel of the three primary colors can achieve 256 brightness displays, completed 16777216 colors full-color display, and scan frequency not less than 400Hz/s. 

• Cascading port transmission signal by a single line. 

• Any two points the distance more than 5m transmission signal without any increase circuit. 

• When the refresh rate is 30fps, cascade numbers are not less than1024 points. 

• Send data at speeds of 800Kbps.   

• The color of the light was highly consistent, cost-effective.

• Full-color module, Full-color soft lights a lamp strip. 

• LED decorative lighting, Indoor/outdoor LED video irregular screen.

WS2812B Application Circuit

WS28212, WS2813, APA-109B

An extrude advantage is that the RGB chip on WS2812B has a higher brightness and color uniformity than WS2812. WS2812B has a better structure than WS2812, after we modified the structure, the control circuit, and the RGB light have been separated, and it has a better heat dissipation performance.

Each LED has an independent VCC, GND, DIN, and DOUT pin. The VCC and GND pins are common to all the LEDs, whereas the DIN of the first LED is connected to the signal source, which could be a microcontroller. The DOUT of the first LED is connected to the DIN of the second LED, and so on, as shown in the diagram below.

The figure below shows the timing for writing 0 and 1 to each bit in the register and a reset pulse which acts as settling time.

WS2812B uses pulse width modulation to differentiate between 0 and 1. 1 requires a longer pulse width, whereas 0 requires a shorter pulse width. The total pulse width is 1.25μs, which means that the frequency is 800 kHz, with the respective duty cycles for 0 and 1 being 36% and 64%.

WS2812B Dimension

WorldSemi was founded in 2007, we work as the leading LED specialist in IC designer for Constant Current LED Driver IC, Chip Driver LED, we are recognized as the product development and delivery of LED lighting industry leader and we’ve expanded offerings to the inclusion of LED strip lights, LED point lights and LED controllers, etc.