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DRV3201 Gate discharge current

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Hello,

 

Please answer following question from customer.

 

Customer is using 8400pF gate capacitance FET and adding gate resister between GHSx/GLSx and FET gate.

Gate discharge current is programed 140mA.

When the gate resister is 8 ohm, 140mA discharge current is observed. But discharge current is 78mA when gate resister is 39 ohm.

 

Could you explain why discharge current is reduced to 78mA when gate resister is 39 ohm?

 

Best Regards.


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