Re: need help with choosing inductor for a buck conveter.
@Akanimo I am only designing this to learn I will not use it in a real application so I trying to lower the current for the safety of me and the components.
@FvM, as I said the average for the first 150 microseconds, is about 3 watt but the instantaneous values reach to 30 watts.
I asked a friend and he said it's because the capacitor is acting as a short circuit in the first microsecond until it's charged then the current go lower and that why i find the high power dissipated in the inductor at first and this may also damage the mosfet and he says that the solution is making some kind of soft starter by manipulating the pwm to the mosfet in first 3 sec so it's not open completly until this transit period ends, what do you think of this opinion?