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Thread: How about this for the 12volt line??

  1. #1
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    Post How about this for the 12volt line??

    Could you use 2 or 3 of the LM2587S-12 regulators to get a regulated 12volt output, at a steady 3.5amps with a 5 or so volt input???
    or can't these regulators be connected in parallel??

    [ 07-26-2001: Message edited by: SkinnyBoy ]

  2. #2
    FLAC
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    Post

    Originally posted by SkinnyBoy:
    <STRONG>Could you use 2 or 3 of the LM2587S-12 regulators to get a regulated 12volt output, at a steady 3.5amps with a 5 or so volt input???
    or can't these regulators be connected in parallel??

    [ 07-26-2001: Message edited by: SkinnyBoy ]</STRONG>
    Yes you can, but you will have to make sure that the feedback loops are isolated. Plus, these parts cost 8 bucks a peice!!!
    MPEGBOX - Plexiglass Computer
    www.mpegbox.com

  3. #3
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    yeah, they are expensive, but cheaper than buying a pre-made power supply...

  4. #4
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    Question

    huh?

    Jeff, are you saying something like this:



    should work?

    that would be very ok....

    [ 07-27-2001: Message edited by: marsjell ]
    If at first you don't succeed.........
    destroy all evidence you tried

    for info on t6369c LCD or Presslab's powersupply check:
    http://www.namms.tk <=updated!!

  5. #5
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    Yeah, I think it would work, but I don't need the -12volts, so it would be simpler for me...

  6. #6
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    Question

    hey skinnyboy,

    could you tell me the difference between the 2578T and the 2578S ?

    can't figure it out on nationals website...
    If at first you don't succeed.........
    destroy all evidence you tried

    for info on t6369c LCD or Presslab's powersupply check:
    http://www.namms.tk <=updated!!

  7. #7
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    Yeah, I can, it is the package type....

    the 2587T is in a TO-220 package
    the 2587S is in a TO 263 package..

    apart from that, they are the same...

  8. #8
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    Originally posted by marsjell:
    <STRONG>huh?
    Jeff, are you saying something like this:
    [ 07-27-2001: Message edited by: marsjell ]</STRONG>

    No.. That would not work, the diode would keep the first supply from doing anything because the one with the diode would keep it regulated at 12.7 while the other one would turn off because it would think that it has gone over voltage when the other one just put it at 12.7 You would need several transformers to do it in parallel. You would be better off just using a really beefy transistor.

    Jeff_
    MPEGBOX - Plexiglass Computer
    www.mpegbox.com

  9. #9
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    umm...
    yeah, I agree with jeff....

    lol
    umm....
    yeah

  10. #10
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    But could you do this???



    And use a MAX787 or similar to pre-regulate the voltage...
    ???
    just a thought...

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