i have using P channel mosfet for high side switching. the mosfet was frequenctly failed . i.e the gate to source shorted . resistance forming across the gate to source of MOSFET. the load power i have using less than 0.5W only. even though the MOSFET continously failed. To switch on the MOSFET the gate of mosfet is i give striagh ground . is it the reason for forming resistance across the gate to source.
I have found the reason for mosfet failure ( i.e gate to source damage ). high spike voltage in the gate terminal is the reason damage. the high voltage spike from the soldering ion station. i have using only branded ion only. eventhough the high voltage spike comming from the soldering road. the high voltage spike affecting the mosfet isolated gate terminal. i have tried i different MOSFET the same problems is happening. i have tried in another soldering station this problems is not comming . then only i have found the voltage spike from the soldering station only.