I am tinkering with Adafruit's Charlieplex PWM LED Driver module. And I notice audible buzz when I lit my LED brightness to the maximum. This is noted in their documentation:
You might notice some buzzing or ringing sounds from the display when all pixels are lit, this is normal as the Charlieplex driver quickly switches LEDs on and off.
Now, I would like to know if there are improvements that I can make to the circuit to completely eliminate this noise/buzz/hum.
I won't provide the datasheet or schematic here. I think all dimming LEDs have this issue, and I am looking for a guideline or good practises.