how can protect mosfet switch in flyback as switch (wit uc3842)
Hello
here is my circuit for my fly back smps.
but after i start my circuit the (10k ohm resistor) and my mosfet getting so hot(mosfet is worse than resistor).i connected a parallel diode (By150) with DS of mosfet (such as mosfet intersenic diode) but it burn as my circuit has been started.
now how can i protect my mosfet more better than above circuit?
Thanks FVM for your response.
yes it is a simple smps but i didn't draw the other part of schematic, i have only problem in this part of circuit
freq:70 khz
input voltage 320 volt dc
output :24volt dc
The problem is most likely transformer leakage inductance, in so far I don't agree with the statement. What's the transformer windings ratio, did you measure leakage inductance?