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PWM to IRFP054

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manba

New Member
hi, everyone.

i need to use IRFP054 to drive DC motors. the input of the IRFP054 gate is the PWM of pic16f877a. the output of the pic can't drive the gate, so i need your advices to solve this problem.:confused::confused:
 

Arkham00

Member
Use the PIC output to drive a small current NPN transistor like a 2N3904 whose collector is connected to the mosfet gate and to a resistor connected do +12V.
In this way, when the transistor is off, the gate voltage is +12V and the mosfet is in full conduction.

Pay attention that this circuit is an inverter, i.e. the mosfet is ON when the PIC output is 0.
 
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