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Designing Or buying a 150A, 0.5V to 4.5V Power supply

Discussion in 'Electronic Design' started by Naveed, Jan 15, 2004.

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  1. Naveed

    Naveed Guest

    Anybody has any experience designing (or buying) very high current low
    voltage power supplies. There are many dc-dc converters available,
    but they are not programmable for the full range. So I am now
    thinking of designing my own.

    Here's the requirement:

    Voltage In: preferably 48V dc
    Voltage Out = 0.5V to 4.5V (Programmable through DAC)
    Current: 150A
    Features Desired: Current sharing, Very High Frequency (to save on
    capacitors), Very fast transients, Power on/off,

    I would appreciate any help here.

    Thanks
     
  2. That's one heck of a toaster you are building. Here is a paper you might be
    interested in

    http://www.iop.org/EJ/abstract/0022-3735/17/8/006

    I haven't read it (its $30 to look at) but it sounds like it might apply.

    Regards,
    Bob Monsen
     
  3. Fred Bartoli

    Fred Bartoli Guest

    Hi,

    I've designed one about 3 years ago that did exactly that, and a bit more.
    That was part of an ATE tester. From some aspects of your specs I guess your
    app is similar.
    You won't find anything like that readymade, except buying the whole tester.
    Be prepared for the 100s $K though.

    Fred.
     
  4. I'd look into VICOR, but it will be a killobuck.


    --
    *
    | __O Thomas C. Sefranek
    |_-\<,_ Amateur Radio Operator: WA1RHP
    (*)/ (*) Bicycle mobile on 145.41, 448.625 MHz

    http://hamradio.cmcorp.com/inventory/Inventory.html
    http://www.harvardrepeater.org
     
  5. CFoley1064

    CFoley1064 Guest

    From: (Naveed)
    Date: 1/15/04 5:35 PM Central Standard Time
    Hi, Naveed. Actually, with the exception of the requirement of 48VDC input
    power, I'd suggest that the Kepco ATE 6-100 would fit your requirement exactly.
    It's externally programmable with an input voltage, and has current sharing
    capability and remote on/off. It can be used in the high-power operational
    amplifier mode, and has full power bandwidth into the mid-audio frequencies.

    Ah, but that 48VDC requirement. May I suggest using a telecom-quality inverter
    to get 120VAC from the 48VDC power bus, and then use that to drive the Kepco.
    You can get inverters capable of 5KVA off the shelf. That will complete a
    rather large (full rack width, 10U or so) but relatively inexpensive solution.
    Not only that, but since everything's off-the-shelf, you can walk away from it
    when you're done.

    I've used numerous Kepco programmable power supplies for different
    applications, but have never powered them from an inverter. You might want to
    check with the Kepco and inverter manufacturer apps engineers before cutting
    the P.O.s. to avoid any surprises.

    Good luck, and good hunting, sir.
    Chris
     

  6. We've used Power-ten
    (http://www.elgar.com/products/PowerTen/index.htm)
    high current, low voltage supplies - but they are 120 or 208VAC input.
     
  7. Naveed

    Naveed Guest

    Thankyou everybody,

    I appreciate so many people answering this.

    I have been seriously looking into Vicor, (as somebody suggested).
    Looks like their solutions are not as expensive as I thought.

    This power supply needs to go on to a PCB, so it can't be too large or
    bulky.

    Thanks again for your answers.
     
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