Typically the compensation would be done on the current side, not the PWM percentage, otherwise all of the color mixing charts would be wrong.

Most simple PWM controllers are dumb as a post, no gamma correction or current control other than the limiting resistors, all quite crude.
Most consumers don't know/care about exact color matching.
When you actually do gamma correction, it's usually applied to the PMW, it's the easy way.

 

I recently built a 4 channel RGBW LED controller to work my kitchen counter and cabinets. I used IRLR2905TRPBF MOSFETs bought off EBAY for this. They are rated 42A each so their current limit is the heat sinking of the PCB, which is fairly minimal but they do not get hot. They are 2V Vgth max gate thresholds work fine with the ESP32 controller (works with Alexa!) I use which runs off a 3.3V supply.

Controllers that run off lower supply voltages just don't exist IMHO so don't go buy an oscilloscope just cause some guy on the interweb told you you neededd one..

The IRLZ44 device you found also looks suitable and may be easier to wire in (it has longer leads). If this was my build I would try the MOSFETs without any heat sinking as your LEDs only draw in the half amp range on each driver.

 

I recently built a 4 channel RGBW LED controller to work my kitchen counter and cabinets. I used IRLR2905TRPBF MOSFETs bought off EBAY for this. They are rated 42A each so their current limit is the heat sinking of the PCB, which is fairly minimal but they do not get hot. They are 2V Vgth max gate thresholds work fine with the ESP32 controller (works with Alexa!) I use which runs off a 3.3V supply.

Controllers that run off lower supply voltages just don't exist IMHO so don't go buy an oscilloscope just cause some guy on the interweb told you you neededd one..

The IRLZ44 device you found also looks suitable and may be easier to wire in (it has longer leads). If this was my build I would try the MOSFETs without any heat sinking as your LEDs only draw in the half amp range on each driver.

Can you share your project code or any schematic you have? I have in plan to control some leds on ceiling with ESP32. To react to music etc.

I just swap the A2SHB with IRLZ44n and those just work perfectly without heatsink as you suggested. Tested for some minutes at full brightness and no sign of warming at all. I believe that those will hold very well.

 

Honestly I don't think my code would help you much as it is specific to RGBW strips that change in response to Alexa commands (using the Sinric.com server) doing a smooth transition between intensities for several seconds. Completely different from a color organ. You would be better served by reading a tutorial on PWM with the ESP32.

There are 16 timers in the ESP32 so you can have 16 different PWM outputs.

I added my Kicad project. The schematic is OK though I was way off when selecting the regulator. Had I RTFM I would have seen this device took half an amp, not the 100 mA I guessed. The AMS1117 is rated for this but needs some help. After 6 months of use I had to rebuild mine and I took the opportunity to stick in a switching regulator module for power. And the IR receiver and pushbutton are horribly placed, and there wasn't an IR lib when I did this (may be now).