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Power supplies in parallel

Discussion in 'Electronic Basics' started by Chris W, Nov 6, 2003.

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  1. Chris W

    Chris W Guest

    I found a great deal on some 12V 13A switching power supplies ($19).
    While 13A is enough for most of what I want to do, I use a few things
    that require more current. So I was considering getting 2 or 3 and
    hooking them up in parallel. Will this cause any problems since one
    will always be putting out a slightly higher voltage than the other no
    mater how close you adjust them? Also, as an alternative, I was
    thinking of maybe just putting a 22 Ah Sealed lead acid battery in
    parallel to take up the slack the power supply couldn't. In this case
    if I had 25A load would the power supply carry 13A and the battery carry
    the rest?

    --
    Chris W

    "They that can give up essential liberty
    to obtain a little temporary safety
    deserve neither liberty nor safety."
    -- Benjamin Franklin, 1759 Historical Review of Pennsylvania
     
  2. JeffM

    JeffM Guest

    I found a great deal on some 12V 13A switching power supplies ($19).
    Can you isolate portions of the load and supply them individually?
     
  3. Chris W

    Chris W Guest

    No, I have a compressor that draws 16A continuous and 50A on startup. It
    is normally hooked to a car battery but on occasion it would be nice to
    run it from AC.


    --
    Chris W

    "They that can give up essential liberty
    to obtain a little temporary safety
    deserve neither liberty nor safety."
    -- Benjamin Franklin, 1759 Historical Review of Pennsylvania
     
  4. Then hook a 20 amp battery charger across the battery and run it that
    way.
     
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