replacing NVIDIA 8800 GTX mosfets

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  • lele.v
    Member
    • Aug 2012
    • 21
    • italy
    #1

    replacing NVIDIA 8800 GTX mosfets

    hi all!
    i'm trying to repair a videocard NVIDIA 8800 GTX.
    i must replace the four mosfet near the power plugs on the upper-right of the board.
    These are four "Alpha&Omega 4422 BA652P"; this is the datasheet:

    http://www.datasheetdir.com/AO4422+download

    I've tried to search this component but i haven't found it... anyone knows a good replace of this component that i can use?
    Tags: None
    • Duncanbest
      Senior Member
      • Jul 2012
      • 81
      • Taiwan
      #2
      Re: replacing NVIDIA 8800 GTX mosfets

      You can use this web to find the mosfet you want:

      http://www.vishay.com/mosfets/so-8-package/

      filter setting--> Configuration : single Channel:N

      then you find the 30V rds on(at 10V) < 15m Ohms Id>11A component,check the pin out fit the original.

      Mostly the lower rds ,the price is higher.

      If you prefer other's brand like ON ,IR ...etc,do the same way

      http://www.onsemi.com/PowerSolutions/parametrics.do

      https://ec.irf.com/v6/en/US/adirect/...672+4294852444

      http://www.fairchildsemi.com/search/...e&&infoN=10618

        Comment

        • lele.v
          Member
          • Aug 2012
          • 21
          • italy
          #3
          Re: replacing NVIDIA 8800 GTX mosfets

          thank you duncanbest, but i already know where to search the mosfet to buy (farnell, because i'm also buying other parts from it).

          my problem is that i dont know to search an equivalent mosfet, i'm worried of take no notice of some parameters or other things in the choice of the mosfet, so i prefer to trust of the advices of more experienced people that can search the right mosfet

          hope that someone can help me

            Comment

            • Duncanbest
              Senior Member
              • Jul 2012
              • 81
              • Taiwan
              #4
              Re: replacing NVIDIA 8800 GTX mosfets

              FYR

              http://it.farnell.com/vishay-silicon...so8/dp/1840421

              http://it.farnell.com/international-...o-8/dp/1551902

                Comment

                • lele.v
                  Member
                  • Aug 2012
                  • 21
                  • italy
                  #5
                  Re: replacing NVIDIA 8800 GTX mosfets

                  thank you duncan!

                  dont know if it's usefult but i attach a photo of the 4 mosfet on the board for completeness
                  Attached Files
                  Last edited by lele.v; 10-04-2012, 12:42 AM.

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