Hi
I have used IR logic level power fets (H-bridge) with Pics and a driver chip with no failures. I'm now trying to use these fets as a linear load for a dc motor and the fets are failing with a gate to drain short (usually within 15 min). The setup consists of a 12 volt motor driving a 12v motor that is loaded by the fet. The fet is rated at 100 amps, I'm drawing 26 amps, the fet is well heat sinked and fan cooled. The duty is 25 to 50%, not PWM'd. A scope from the gate to source doesn't show any large spikes.
What am I missing? Any help will be greatly appreciated.
Greg
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