The D22 is mainly used for RGB LED driving. The chip integrates a signal decoding module, PWM brightness adjustment circuit, data forwarding module, and other functions internally.

Through the input interface (DIN), the chip enables single-line control of LED strings (up to 6 RGB LEDs per D22; no limit on the number of RGBs in cascaded applications). When multiple D22 chips are cascaded, data is forwarded to the next D22 through the output interface (DO), meeting the needs of more application scenarios. It features a simple interface, minimal external components, and reliable functionality, making it suitable for LED decorative products such as mice, keyboards, and light strips.