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Step Up Converter?

Discussion in 'General Electronics Discussion' started by Hsnopi, Dec 24, 2015.

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  1. Hsnopi

    Hsnopi

    47
    8
    Dec 9, 2015
    Hello,
    So we have an automotive application here. The alternator currently in the system runs 12v. Not sure how many amps. Trying to get that now. We have two systems that require 24v. one draws a couple amps. the other draws what looks like 20 amps. Instead of installing a second alternator would it be better to install a step up converter? I know conservation of energy would mean I lose some amps but I'm not sure of the maths here.

    Thoughts?

    Thanks,
    Hsnopi
     
  2. Hsnopi

    Hsnopi

    47
    8
    Dec 9, 2015
    ok, of course after I post I find some answers. No idea how I wan't able to find them before. It's still p=vi basically.
     
  3. BobK

    BobK

    7,682
    1,688
    Jan 5, 2010
    Yep. Which means if you step up from 12V to 24V and you need 20A at 24V, you would need 40A from the 12V supply + some for inefficiency.

    Bob
     
    Martaine2005 and davenn like this.
  4. Arouse1973

    Arouse1973 Adam

    5,165
    1,087
    Dec 18, 2013
    Wow :eek:
     
    Martaine2005 likes this.
  5. AnalogKid

    AnalogKid

    2,504
    719
    Jun 10, 2015
    Even with synchronous rectification it will be difficult to reach 90% efficiency, so that 40 A is at least 45 A, and probably closer to 50 A.

    ak
     
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