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problem with boost converter

Discussion in 'Circuit Simulation & PCB Design' started by SHASHWAT, Nov 17, 2016.

  1. SHASHWAT

    SHASHWAT New Member

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    I'm working on boost converter intending to convert5v to higher voltages and giving this output to 7812. But 2577 giving output as 5 v itself, ie is not boosting the signal in using following circuit[​IMG]
     

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  2. eTech

    eTech Active Member

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    Image link doesn't work
     
  3. SHASHWAT

    SHASHWAT New Member

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    Capacitance value is not visible fyi it is 680 microfarad. However, note i can obtain 12 v as no load voltage, but it's regulation is very poor, voltage is dropping to as low as 1.25 volts when applied to load.
     
  4. dave

    Dave New Member

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  5. Les Jones

    Les Jones Well-Known Member

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    I suspect the inductor that you are using may not be suitable. Can you post a picture of the inductor that you are using and the specifications. (DC resistance, Current rating and any other data given in the specifications.)

    Les.
     

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