eem2am
Banned
The current sense resistors in a ~20W offline flyback suffer spikes of several amps due to the capacitance at the drain node being discharged through the fet every time it switches on.
......despite being high current, the duration is so short that the power rating of the resistor is not broached.
...but do you feel that special pulse rated resistors should still be used for this purpose, due to the height of the current peaks?
......despite being high current, the duration is so short that the power rating of the resistor is not broached.
...but do you feel that special pulse rated resistors should still be used for this purpose, due to the height of the current peaks?