FSP455-60PA 450 watts

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  • everell
    Badcaps Legend
    • Jan 2009
    • 1514
    • USA
    #1

    FSP455-60PA 450 watts

    I haven't seen one of these on the forum so thought I would show it off. Two bloated capacitors in the 5VSB output filter, an easy fix. Here is what is inside:

    two mains capacitors 1500 uF/200 volts (OST)
    two 16N50 main switching FET transistors
    DM311 5VSB chip (I like this!)
    UC3845 main pwm chip (SOT mounted on bottom of pc board)
    PS223 supervisory chip

    Here are some pictures
    Attached Files
    Old proverb say.........If you shoot at nothing, you will hit nothing (George Henry 10-14-11)
    Tags: None
    • PeteS in CA
      Badcaps Legend
      • Aug 2005
      • 3579
      • USA, Unsure of Planet
      #2
      Re: FSP455-60PA 450 watts

      Reasonably beefy MOSFETs (16A, 500V). The UC3845 means current mode operation; it's output is single-ended, so I think you have a two-switch forward converter. Those heatsinks seem a bit ... well ... not beefy. I hope you have a really good fan. What vendors/series on the O/P caps? The blue O/P inductor core is not familiar ... anyone know what it is and who makes it? It's not Micrometals -26 or -52 material.
      PeteS in CA

      Power Supplies should be boring: No loud noises, no bright flashes, and no bad smells.
      ****************************
      To kill personal responsibility, initiative or success, punish it by taxing it. To encourage irresponsibility, improvidence, dependence and failure, reward it by subsidizing it.
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