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Thread: PFC or not, auto-switching or not

  1. #11
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    Quote Originally Posted by ashiekh View Post
    I'm confused, for me the label seems to suggest it does auto-switch
    Yeah. I changed my response.

    I thought you were giving me the example of a PSU that does not auto switch, but you provided an example of the kind of PSU we see every day.

  2. #12
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    Trying to understand the point of your Zippy picture. Are you trying to show an example of a PSU that automatically switches between two ranges as opposed to supporting a full range?

  3. #13
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    Yes, that was my point.

    Quote Originally Posted by ashiekh View Post
    I seem to recall auto-switching power supplies that had a 120V range and a 240V range and no manual switch although I cannot find an example at the moment; this is from a long time ago.
    I always wondered what it would do if it was between ranges

    100-120V

    200-240V
    Last edited by ashiekh; 09-26-2019 at 11:39 AM.

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    "Fun Fact" pPFC or no PFC units are not allowed in Europe, at least for prebuilt PCs...

  5. #15
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    I'm just thrilled that I can still remember such things from so far back.

  6. #16
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    Quote Originally Posted by ashiekh View Post
    Yes, that was my point.



    I always wondered what it would do if it was between ranges

    100-120V

    200-240V
    Probably nothing. I bet that PSU supports full range.

  7. #17
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    Anyhow, sorry about pulling this thread off-topic...

    and I didn't even get kicked out...

  8. #18
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    cougar SL have auto range ( auto switch without PFC) it use a simple voltage detect circuit and switch by relay .

  9. The Following User Says Thank You to asf14tomcat For This Useful Post:

    ashiekh (09-27-2019)

  10. #19
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    Quote Originally Posted by asf14tomcat View Post
    cougar SL have auto range ( auto switch without PFC) it use a simple voltage detect circuit and switch by relay .
    This one?

    https://www.pccasegear.com/products/...w-power-supply

    Seems like that would cost more than just making it with APFC! LOL!

    You've opened one up and confirmed this?

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    Yes. I'm opened this . cougar have two version SL one with auto range and one with red switch .
    https://www.newegg.com/p/N82E16817553018
    You can see a small pcb sit in ac connector . this is "auto range" circuit board

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