This post explains for the semiconductor PL9823.
The Part Number is PL9823.
The function of this semiconductor is Shift Register Programmable RGB Lamp.
Manufacturers : BaiCheng
Preview images :
1. Power Supply : DC 4.5V ~ 6V
2. Integrate RGB LEDs with Control IC at same body
3. Support 256 dimming level for each color
4. Internal frequency up to 800Khz
5. Single wire signal transmission ( clock and Date )
6. To be controlled by external MCU to achieve target image
7. No external component required