Seasonic SS-200SFD

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  • milesy
    Member
    • Aug 2012
    • 34
    • Australia
    #1

    Seasonic SS-200SFD

    Hi Guys

    well this is project number 2 - this PSU just stopped one evening after a brown out on the AC supply (tranformer somewhere died giving only 80v on the ac line)

    i opened it up and discovered
    1. The main fuse was blown
    2. a number of swollen caps on the secondary

    I thought that i measured the switching mosfet was short but it turns out its actually a diode across the mosfet that is shorted

    The diode is UGK10K (http://www.datasheetarchive.com/UGP10K-datasheet.html#)

    So my first question here is does anyone know of an equivalent of this diode as it doesnt seem to be available and the usuall places?
    Tags: None
    • b700029
      Banned
      • Sep 2010
      • 640
      #2
      Re: Seasonic SS-200SFD

      Manufacturer: "Zowie Technology"

      You need to replace it with an 800V 1A ultrafast diode (<= 35ns recovery time).

        Comment

        • milesy
          Member
          • Aug 2012
          • 34
          • Australia
          #3
          Re: Seasonic SS-200SFD

          Yeah but i can only find reference to SMD packages when searching - any idea of a easy obtainable par number??

            Comment

            • milesy
              Member
              • Aug 2012
              • 34
              • Australia
              #4
              Re: Seasonic SS-200SFD

              do you think this one would be ok

              http://au.mouser.com/ProductDetail/V...yLbLFzY4NPx0k=

                Comment

                • milesy
                  Member
                  • Aug 2012
                  • 34
                  • Australia
                  #5
                  Re: Seasonic SS-200SFD

                  even better can get this one at the local jaycar 4007

                    Comment

                    • b700029
                      Banned
                      • Sep 2010
                      • 640
                      #6
                      Re: Seasonic SS-200SFD

                      The original was max 35ns, so those are a bit slower. Might work, or might not, depending on how they spec'd the original circuit.

                        Comment

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