This might not even be the right place for me to ask, but I hope somebody can help;
I have an arduino mega with 4 PWM outputs (5v, fitted with 220 ohm resistor) that I would like to use to control about 2 meters of your average 5050 RGBW 24v LED strip. It should consume about 35 watts in all, so at about 370mA per channel it shouldn't be too monstrous to handle, I think.
All the LED drivers I have found so far require big MOSFETs with heatsinks, so I'm wondering how it is possible that all these cheap chinese wifi controllers can handle it in such a small and relatively low temperature package? Isn't it possible to make something like that? Suggestions i've had were using the IRL540NPBF 1 N which can do a whopping 140w on its own, which seems excessive to me.
Does anyone know of a component I could use on a typical 2.54mm board to make a nice little PWM controlled 4 channel LED driver?