Buck Converter Testing

Discussion in 'General Electronics Chat' started by imraneesa, May 13, 2016.

  1. imraneesa

    Thread Starter Member

    Dec 18, 2014
    184
    4
    Hello everybody,

    i want to test buck converter. i know pin sw is switching pin. but when i tried to check the waveform using my oscilloscope i am not getting any oscillations. i dont know if i am doing it right. i have set the oscilloscope 5v/div and 10us also tried 10ms.

    fp7103 is the chip. i have not connected any output load. just gave input voltage 8v.

    Thank you,

    Regards,
    Imran
     
  2. ronv

    AAC Fanatic!

    Nov 12, 2008
    3,282
    1,236
    It needs a load.
     
  3. crutschow

    Expert

    Mar 14, 2008
    12,995
    3,229
    When a switching regulator reaches it's specified voltage output with no load it has to stop or the output would go above the control voltage. That's why it needs a load if you want to see its switching operation.
     
  4. imraneesa

    Thread Starter Member

    Dec 18, 2014
    184
    4
    Thank you everybody.
     
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