BP5001D is a dimming interface conversion chip that can convert the 0-10V signal at the dimming port and the voltage signal generated by the resistance value into a PWM signal. This PWM signal can be directly used to control the LED driver chip or, after optocoupler isolation, realize isolated dimming applications. BP5001D can flexibly adjust the PWM frequency through an external frequency setting pin to adapt to different types of optocouplers. BP5001D can realize compatibility with various passive 0-10V dimmers through an external dimmer current setting pin.