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mosfet driver dc motor controller with pwm

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aspirecole

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is it enough to use 5V pwm to drive a mosfet for a big load?.. should i use a high amplitude pwm or what?.. my mosfet gate voltage is +-20V
 

1.What MOSFET you are using?
2.Are you using H-Bridge to drive motor?
3.Where you have connected your load(DC motor) i.e high side or low side driving?
4.What is the load current requirement?
 

irfz48N not using H bridge just controlling the speed in one direction.. high side driving and the load current is 20A..

- - - Updated - - -

yogece said:
1.What MOSFET you are using?
2.Are you using H-Bridge to drive motor?
3.Where you have connected your load(DC motor) i.e high side or low side driving?
4.What is the load current requirement?
Click to expand...

irfz48N not using H bridge just controlling the speed in one direction.. high side driving and the load current is 20A..
 

what about the supply voltage to the motor?
if you opt low side driving you can use discrete MOSFET driver using BC547(NPN),BC557(PNP) with few resistors;high side driving requires a driver IC such as IR2110(1 High & 1 LOW side driver)
 

yogece said:
what about the supply voltage to the motor?
if you opt low side driving you can use discrete MOSFET driver using BC547(NPN),BC557(PNP) with few resistors;high side driving requires a driver IC such as IR2110(1 High & 1 LOW side driver)
Click to expand...

im connecting 24V battery to the motor. the other wire to the drain of mosfet.. then applying pwm to the gate pin..is it low side drive or high side drive?
 

aspirecole said:
im connecting 24V battery to the motor. the other wire to the drain of mosfet.. then applying pwm to the gate pin..is it low side drive or high side drive?
Click to expand...

Its a low side drive because Source terminal of the MOSFET is directly connected to ground.
you can use the attached circuit diagram it would work for you

dc-motor-driver.png
 

yogece said:
Its a low side drive because Source terminal of the MOSFET is directly connected to ground.
you can use the attached circuit diagram it would work for you
Click to expand...

alright..thanx..can i use other model of transistor for the BC547A and BC557
 

any similar transistor should work
 

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