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IR2110 and mosfet IRFPE50PB for sine-inverter

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Look this schematic....I think that you have problems because you dont have delay circuit. When you turn on high side and switching off low side without dalay you have short circuit between supply and ground for very small time, but that is enogh for heating. In this schematic D1,C1 and R1 make hardware dalay. You can also make software delay.


Thank you. But "com" pin short circuit.
 

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