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
    11
    0
    :) 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.

    Cheers...Vishal.:)
     
  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    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
    11
    0
    thanks for your valuable suggestion. This is very much helpful to me.
     
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