MSI MS 6337 816EPT PRO ver5 problems

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  • Maxxx
    New Member
    • Oct 2005
    • 5
    #1

    MSI MS 6337 816EPT PRO ver5 problems

    Hello!

    Msi MS 6337 816EPT PRO ver5
    Problem: 1 cap bad and 1 mosfet bad (see pics)
    Specs:
    Cap: Teapo, 1000uF, 6,3v, 105C
    Mosfet: Panasonic,
    N-channel logic level field-effect power transistor in a plastic package using
    TrenchMOS™1 technology.
    PHD45N03LT in SOT428 (D-PAK)
    Reference JEDEC TO 252

    VDS drain-source voltage (DC) Tj = 25 to 175 °C - 25 V
    ID drain current (DC) Tmb = 25 °C; VGS = 5 V - 45 A
    Ptot total power dissipation Tmb = 25 °C - 86 W
    Tj junction temperature - 175 °C
    RDSon drain-source on-state resistance
    VGS = 10 V; ID = 25 A 16 - 21 mOhm
    VGS = 5 V; ID = 25 A 20 - 24 mOhm

    It is possible that another component was damaged when cap and mosfet died ?
    Replacing the cap is not a problem, but the mosfet is. Can I replace it with another using
    aprox specs or it's a must for the specs to be the same?
    I found these mosfet candidates from salvaged boards:

    Infineon:
    VDS - 25 V
    ID - 50 A
    Ptot - 83 W
    Tj - 175 °C
    RDSon VGS = 10 V; ID = 30 A 5,0 - 5,9 mOhm
    VGS = 4,5 V; ID = 30 A 7,7 - 9,6 mOhm

    Fairchild Semiconductor:
    VDS - 30 V
    ID - 46 A
    Ptot - 50 W
    Tj - 150 °C
    RDSon VGS = 10 V; ID = 12 A 12,5 mOhm
    VGS = 4,5 V; ID = 12 A 16 mOhm

    Thank you in advance for any advice or information.
    Attached Files
    Tags: None
    • Maxxx
      New Member
      • Oct 2005
      • 5
      #2
      Re: MSI MS 6337 815EPT PRO ver5 problems

      MSI MS 6337 815EPT PRO ver5

      Sorry!

        Comment

        • Rainbow
          Badcaps Legend
          • Aug 2005
          • 1375
          #3
          Re: MSI MS 6337 816EPT PRO ver5 problems

          That seems to be mosfet for VTT (for CPU) or something like that. The exact mosfet type is not critical - only make sure the new one has equal or better parameters. I think that both your Infineon and Fairchild replacement will work.
          The exact type is critical when there are more mosfets connected in parallel or bridge driven by one chip (typical configuration for main VCC CPU power) - then all of them must be of the same type or something bad will happen.

            Comment

            • Maxxx
              New Member
              • Oct 2005
              • 5
              #4
              Re: MSI MS 6337 816EPT PRO ver5 problems

              It's possible that the CPU was damaged ? I didn't find another matching socket type board to test it.
              The bad cap started all the problems ?

                Comment

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