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  1. #1
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    Switching power supply

    I would like to design a switching power supply that provides different voltages for a circuit I designed.
    I need a double voltage (+/- 3v) and two other voltages (+ 5v, +12v).

    I have no experience with the design of such power supplies and I ask you:
    1) Are there any guidelines?
    2) I don't think a transformer exists with all the tensions that I need, can I build it myself?
    3) Is it convenient to build it?

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  2. #2
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    Re: Switching power supply

    what is your vin?
    What are the powers of those rails?

    Kashke (kaschke?) , i think its German, do offtheshelf flyback trasnsformers, possibly for your application.

    If your power source is mains , why not download the "PI Expert " software from power integrations and stuff in your spec...it will design the whole thing for you.


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  3. #3
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    Re: Switching power supply

    Hi,

    There are loads of informations and loads of threads.

    https://www.edaboard.com/showthread....=1#post1659753

    Klaus
    Please don´t contact me via PM, because there is no time to respond to them. No friend requests. Thank you.


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  4. #4
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    Re: Switching power supply

    If you want all of those voltages from a single switch
    and single core you will see cross-regulation as an issue
    (one winner, N "also-rans").

    If you are in it for amusement / education, then you
    can go ahead and play. If you are really looking to
    get a power solution for some other care-about, then
    I'd recommend maybe confine your design effort to
    the "distribution bus converter" (say, the battery to
    regulated 12V) and then hang +5, +3, -3V DC-DC
    modules off the distribution bus (easy enough to find
    12V in, "whatever" out, tiny DC-DC modules - even
    ones that look like 7805 (with a chubbier case, but
    the same low-external-component-count)).

    That way you get to stick a toe in the ocean without
    losing a foot.


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  5. #5
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    Re: Switching power supply

    Quote Originally Posted by treez View Post
    what is your vin?
    What are the powers of those rails?
    I would like to use directly the voltage (220V / 110V) if possible


    Quote Originally Posted by treez View Post
    If your power source is mains , why not download the "PI Expert " software from power integrations and stuff in your spec...it will design the whole thing for you.
    I should try it. Where can I find it?



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  6. #6
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    Re: Switching power supply

    You can customize the battery so you don't have to bother yourself so much



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