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Flyback converter

  1. May 22, 2015 #1
    we know that when we give dc supply to a transformer then transformer action doesn't takes place and the primary winding of a transformer gets burnt even when small dc is injected..but how the transformer used in flyback converter works in dc?? what about its construction?
     
  2. jcsd
  3. May 22, 2015 #2
    A flyback converter (like any DC to DC switching converter) will take a DC input and first "chop" it into a square wave, making it an alternating waveform that can then be passed to the secondary of the transformer.
     
  4. May 22, 2015 #3

    berkeman

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    Staff: Mentor

    http://en.wikipedia.org/wiki/Switched-mode_power_supply

    :smile:
     
  5. May 22, 2015 #4
    but the primary winding is supplied with dc...how it will work on dc??
     
  6. May 22, 2015 #5

    berkeman

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    Staff: Mentor

    You didn't read the wikipedia link, did you... :smile:

    Have a look at the switching waveforms for a simple DC-DC converter. The waveforms are similar for a flyback converter with a transformer...

    The DC input is chopped by turning on and off a transistor, which in turn presents an AC waveform to the inductor or transformer.

    http://www.maximintegrated.com/en/images/appnotes/4266/4266Fig02.gif
    4266Fig02.gif
     
  7. May 22, 2015 #6
    thank you..:)
     
  8. May 22, 2015 #7
    Here is a good reference for SMPS - TI Topologies
     
    Last edited: May 22, 2015
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