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adjustable switching power supply

Discussion in 'Misc Electronics' started by Steve Wolfe, May 5, 2004.

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  1. Steve Wolfe

    Steve Wolfe Guest

    I'm interested in an adjustable switching power supply for use with some
    peltier TECs to use in conjunction with a temperature sensor in order to
    avoid abrupt cycling. If anyone has pointers to a (hopefully affordable)
    setup that can provide up to 6 or 7 amps at 12 to 15 VDC from a 120VAC
    source, I'd appreciate it.

    I've thought of regular adjustable regulators, but adding the
    inefficiencies of the step-down transformer, the inefficiencies of the
    regulator, and the inefficiencies of the TECs makes it just a bit
    distasteful. ; )

    steve
     
  2. Jerry G.

    Jerry G. Guest

    You would have to get the schematic for your supply. Take a look at how they
    do the feedback sensing for the regulation. The problem here is that there
    may be many complications in doing this. Most of the main outputs of the
    supply also use added fixed regulators, that are part of the feedback sense.
    This is going to add more to the complexity for what you want to do. The
    way I have seen this done in the industry, is to use an adjustable regulator
    after the supply output. This leaves the switching supply more stable, and
    dependable, as per how it was designed. An external adjustable regulator is
    probably going to be the most cost effective way to do this.

    --

    Greetings,

    Jerry Greenberg GLG Technologies GLG
    =========================================
    WebPage http://www.zoom-one.com
    Electronics http://www.zoom-one.com/electron.htm
    =========================================



    I'm interested in an adjustable switching power supply for use with some
    peltier TECs to use in conjunction with a temperature sensor in order to
    avoid abrupt cycling. If anyone has pointers to a (hopefully affordable)
    setup that can provide up to 6 or 7 amps at 12 to 15 VDC from a 120VAC
    source, I'd appreciate it.

    I've thought of regular adjustable regulators, but adding the
    inefficiencies of the step-down transformer, the inefficiencies of the
    regulator, and the inefficiencies of the TECs makes it just a bit
    distasteful. ; )

    steve
     
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