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ATX supply question

Discussion in 'Radio Circuits, Repair & Performance' started by K8ERV, Jun 21, 2012.

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  1. K8ERV

    K8ERV QRZ Member QRZ Page

    I converted an ATX to a general bench supply. Very easy, and works well. But when I overload it (brief short etc) it shuts down.

    Ok, but in about 30 minutes? it comes back to work.

    I can't figure out what kind of protective system it uses that takes that long to reset.

    Any ideas?

    TOM K8ERV Montrose Colo
     
  2. AF6LJ

    AF6LJ Ham Member QRZ Page

    From articles I have read the subsystem they use requires removal of line voltage for a timely reset.
     
  3. K8ERV

    K8ERV QRZ Member QRZ Page

    I've tried that, no joy. Not a problem, just curious.

    TOM K8ERV Montrose Colo
     
  4. WN6U

    WN6U Subscriber QRZ Page

  5. K8ERV

    K8ERV QRZ Member QRZ Page

    That is a possibility, but I didn't see any times. I doubt if that would trip instantly and take so long to reset. ??

    TOM K8ERV Montrose Colo
     
  6. AF6LJ

    AF6LJ Ham Member QRZ Page

    I should have mentioned that the supply must remain without mains voltage for about a minute.
     
  7. K8ERV

    K8ERV QRZ Member QRZ Page

    Mine takes a lot longer to reset, that is what I can't figiure out.

    TOM K8ERV Montrose Colo
     
  8. AF6LJ

    AF6LJ Ham Member QRZ Page

    That is strange Tom...
    Have you looked up the ATX standard on the net for clues.
     
  9. K8ERV

    K8ERV QRZ Member QRZ Page

    No, probably a good idea, but too much trouble. I just thot maybe someone else had seen this long reset and already knew why.

    TOM K8ERV Montrose Colo
     
  10. K8ERV

    K8ERV QRZ Member QRZ Page

    I see by the diagram there is an over-current shut down, which looks fast, but I don't see any thing that
    would require such a long time to reset.

    TOM K8ERV Montrose Colo
     
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