20Hz is very slow relative to the rise and fall times you mention. I don’t think you will have a lot of switching losses at 20Hz. Be careful when use low gate drive mosfets, they got normally higher gate capacitance than normal mosfets. You mention 3.3V which I assume you driver the gate straight from some CPU. If switching loss is an issue and you drive via a CPU pin, consider a gate driver first.
1 Like