need some help with dc - dc buck and boost converter

Discussion in 'Homework Help' started by Lone, Mar 1, 2013.

  1. Lone

    Thread Starter New Member

    Sep 12, 2012
    2
    0
    Hi there - i am currently building a buck and a boost converters and i am not getting the output that i want. both the converters output have got very high voltage spike and also for the boost converter output there is a slight voltage dip.(refer to attached pics yellow waveform is the duty cycle and blue waveform is the output)

    Anybody have any advice regarding the output these converters are giving? Like what can i do to remove these spikes? What could be causing these spikes? And what is with the slight voltage dip in the boost output? What can be done to improve the boost output?

    Thoughts?
     
  2. #12

    Expert

    Nov 30, 2010
    16,298
    6,811
    Without a schematic of the circuit, we have nothing to work with.
     
  3. Lone

    Thread Starter New Member

    Sep 12, 2012
    2
    0
    i have attached the schematic of my circuit, the values for the components are the same as what i had tested but the part nos. are not.
     
  4. #12

    Expert

    Nov 30, 2010
    16,298
    6,811
    Please try again. I made the effort to get a magnifying glass, but I still can't see enough to understand what you posted.
     
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