LA-9591P Chip identification request

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  • Mazorca
    Badcaps Veteran
    • Jan 2017
    • 463
    • USA
    #1

    LA-9591P Chip identification request

    Hi, I have a dell Ultrabook with an LA-9591P motherboard. This chip heats up rather quickly, cosuming more than 2 amps at 1.5 volts. It is marked with a slanted P then 7403 and underneath GA3131. On the schematic it is PQ700. I can't find the datasheet for it, any help?
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    • SMDFlea
      Super Moderator
      • Jan 2018
      • 21874
      • UK
      #2
      Re: LA-9591P Chip identification request

      i think its a vishay Si7403DN http://www.s-manuals.com/smd/74
      Last edited by SMDFlea; 12-10-2018, 09:41 AM.
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        Comment

        • Mazorca
          Badcaps Veteran
          • Jan 2017
          • 463
          • USA
          #3
          Re: LA-9591P Chip identification request (solved)

          Thank you SMDFlea, Mouser Electronics here in the USA doesn't carry it, I will continue looking now that I really know what it is. Can I substitute with another mosfet with same values ( 20V 4.5A 3.5W) in same package, trenchfet?
          Edit: I found this: Si7403BDN-T1 is the same part, and Mouse does carry it.
          Last edited by Mazorca; 12-10-2018, 11:32 AM. Reason: Found part

            Comment

            • SMDFlea
              Super Moderator
              • Jan 2018
              • 21874
              • UK
              #4
              Re: LA-9591P Chip identification request

              According to this post on elvikom the PQ700 is a SQ7415EN ,its rated at 60V https://www.elvikom.pl/dell-7440-ply...je-t54449.html . I`m not sure what part you need now, can you take a close up photo of PQ700 ,and other members here might have some suggestions as to what the right part should be.
              Last edited by SMDFlea; 12-10-2018, 02:58 PM.
              All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

                Comment

                • ktmmotocross
                  Boardkiller
                  • Feb 2014
                  • 3627
                  • slovakia
                  #5
                  Re: LA-9591P Chip identification request

                  just replace it with any p-channel 20A 30V mosfet

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