Driving circuit for MOSFET.

Discussion in 'Embedded Systems and Microcontrollers' started by vishal_ranavare, Jan 31, 2009.

  1. vishal_ranavare

    Thread Starter Member

    Jan 28, 2009
    :) Hi guys.........

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

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

    :confused: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.

  2. mik3

    Senior Member

    Feb 4, 2008
    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?
  3. vishal_ranavare

    Thread Starter Member

    Jan 28, 2009
    thanks for your valuable suggestion. This is very much helpful to me.