10-21-2024, 08:56 AM
(10-21-2024, 07:41 AM)admin Wrote: Do you use for DC load or AC load? can you list load type in details.
I use 12V (DC) LED strips and bulbs in my flat for lighting. Some are 5m+ long or have 10+ bulbs in parallel therefore they consume a couple of Amperes at full brightness. Usually I don't need full brightness, so I'd like to be able to dim them. Right now I have 3x240W 12V power supplies each feeding a subset of the lamps/LEDs. They are being dimmed/PWM-ed with a MOSFET driver connected directly to ESP GPIO, driving a 70V, 10A N-channel MOSFET. That way even at 20kHz, no heat sink is needed.
I'm not able to find any good alternative for this use case. Seemingly all the commercially available LED dimmers/boards max out at ~1-2kHz (I guess because they don't use MOSFET driver IC). I could achieve 20kHz+ frequency dimming with dimmable PSUs but I'd need ~20 of them which would be ridiculously expensive compared to the current 3x240W PSU setup.