24V DC Reg. PSU - Please help

Discussion in 'The Projects Forum' started by SIS_ICT, Sep 28, 2009.

  1. SIS_ICT

    Thread Starter New Member

    Sep 28, 2009
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    I want to find a product / build a circuit that does such thing:

    I have an irregulated 24V DC output coming from a battery that have an impedance of +/-10%.

    I would like to find a product / build a circuit that will keep that +24V regulated all the time. Also, the PSU must give an output of 5Amps.

    P.S: This will be connected to a telecom equipment (antenna)

    Therefore:

    Input: +24V DC 5Amp --> Output: Regulated +24V DC 5Amp


    Thanks for your help!!!
     
  2. mik3

    Senior Member

    Feb 4, 2008
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    Search for a buck-boost converter.
     
  3. SIS_ICT

    Thread Starter New Member

    Sep 28, 2009
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    Thanks for your suggestion on the buck-boost, but i don't know why, it look didn't convince me. Do you recomannd something better please?
     
  4. Wendy

    Moderator

    Mar 24, 2008
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  5. SIS_ICT

    Thread Starter New Member

    Sep 28, 2009
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    If I don't have a mistake, that equipment needs an input of 100-240VAC to operate not 24V DC or?

    '24Vdc/6.5A. Manufactured by Cosel, PBA150F. This enclosed switching power supply is another winner from B.G. Micro. 100-240VAC input......'
     
  6. Wendy

    Moderator

    Mar 24, 2008
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    My bad, I was thinking you need a power supply, missed the comment about batteries. The basic principle remains, a buck boost can up the voltage and regulate it. I've seen references to a National Semiconductor chip that I think would do it, but I don't have the part number handy.
     
  7. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Yes, you'd need a buck-boost DC-DC converter. Such things can be pretty efficient (as much as 93%) but they still consume some power.

    Switching supplies also generate quite a bit of electrical noise. You'll have to filter the output very well to get rid of most of it.
     
  8. SIS_ICT

    Thread Starter New Member

    Sep 28, 2009
    4
    0
    thanks for your help
     
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