Hi guys.........

I am working on industrial project based on AT89c55WD. Here i want to drive IRF640N mosfet from microcontroller.
1]Wat sort of circuit, i have to implement for driving these MOSFET's. I am using 12 such FET's.

2]Is any Driver IC available? As these are high current [18 A] devices,it needs isolation.Which Opto should i use?

3]I need max 5 A current ,which would be the better solution --transistor[TIP 122] or MOSFET? Switching Speed of the apllication is moderate i.e. all MOSFETs operate one by one within 3 to 10 minutes.

Plz suggest your expert opinion.

Cheers...Vishal.

 

Yes, there are special ICs called MOS drivers to drive MOS transistors. If you want you can use BJTs to drive them.
A circuit will be helpful.
What do the MOS drive?

 

thanks for your valuable suggestion. This is very much helpful to me.