Hi
I am developing a boost converter rating I/P 150V-200V and O/P 350V , 370W. The circuit diagram is attached,switch is IRF840. When i am testing the circuit, the switch and output diode gets damaged (after about 2 min)even when input is 50V , 50%duty ratio ,50kHz. There is no heating in the heat sink Just a small smoke comes and drain and gate is shorted and diode is also shorted. How is the switch getting damaged. Before when I was using the switch IRF830 it was working till 300V o/p before getting damaged.
I am developing a boost converter rating I/P 150V-200V and O/P 350V , 370W. The circuit diagram is attached,switch is IRF840. When i am testing the circuit, the switch and output diode gets damaged (after about 2 min)even when input is 50V , 50%duty ratio ,50kHz. There is no heating in the heat sink Just a small smoke comes and drain and gate is shorted and diode is also shorted. How is the switch getting damaged. Before when I was using the switch IRF830 it was working till 300V o/p before getting damaged.
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