Help :Driving mosfets from transistors

[Electronics_chaitanya]

Hello friends


I am making Stepper motor controller.I choose Mosfet IRFZ44 for driving stepper motors but i cant found any mosfet driver ic of logic level mosfet in my city.Today i found design from net which shows that how to drive Mosfets by using Transistor.So i want to ask u that is this circuit work?Switching frequency is near 50Khz.

I also want to know which method is batter? 1: driveing Mosfets from IC such as IR2111 of from transistors?



Plz replay me as soon as possible







-Regards

 

[alexan_e]

The circuit you have posted can only drive a low side Nmosfet so I assume that you are not making an H bridge but you are using 4 mosfets as low side switches to control a unipolar motor.
Is this the case?

Alex

---------- Post added at 18:34 ---------- Previous post was at 18:29 ----------

This circuit drives the base of the transistors through a 1K resistor so the output current will be limited and this will slow the mosfet speed.

Alex

 

[alexan_e]

Note that the circuit you have posted needs more than 6v input to work, you can't control it using 3.3 v or 5v logic level

I would suggest a solution like

You can replace 2N7000 with a transistor if you want (and a base resistor)

Alex

 

[Electronics_chaitanya]

Thankx for ur reply but now i found IC IR2111 so i decided to work with it.Thank u very much