About a bipolar stepper motor controller circuit

[dilz]

Our project has three bipolar stepper motors. Motors
current: 2.1A
Voltage: 12v
I need a driver circuit fro this motor. I used L298 IC circuit but the output current is insufficient. After that I used H bridge with use of C1061 & A670 power transistors. with use of that motor is functioning well but transistors generate heat. Can anyone give me a better driver circuit for this?

 

[barry]

I would use MOSFETs rather than bipolar transistors. Much less power dissipation.

 

[dilz]

Thank yuou Barry. But can u explain about balancing the power of MOSFETs

 

[barry]

Thank yuou Barry. But can u explain about balancing the power of MOSFETs

What do you mean, "balancing the power"?

 

[dilz]

i meant that transistors have to be controlled by the current. As an example if one trans is on then other one have to be off. like that type of things.

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Can you explain me how to balance the current of MOSFETs.? as an example if one is on then other one can be off

 

[barry]

Do you mean controlling phase current? Yes, one transistor is on while the other is off; that's the function of your driver circuit. The transistors are not controlled by the current; the current is controlled by the transistors, is that what you mean? Still not quite sure what your question is. Are you asking for a complete design?