Constant Current LED Driver With Single IC RM9003 (6V to 600V)
English datasheet: https://iranmls.com/wp-content/uploads/2021/10/RM9003A-Datasheet.pdf
Current depends on the value of resistor (Rs), calculated by following formula:
You can order this PCB from PCBWay: https://www.pcbway.com/project/shareproject/220V_LED_Driver_7c8da267.html
Video:
