as I understand it, those Chinese RGB LED controller chips are a PITA to use
???

Very easy to use with, say a 12F1822 or 1840 ... just need to run @ 32 Mhz internal to be reliable.

I drive 4 PL9823 leds in PWM mode with a 1840, ( 2 beacons and 2 strobes lights ) for a model aircraft light system ...

Alain