Buck Converter Output Voltage

Discussion in 'Homework Help' started by notoriusjt2, Oct 26, 2010.

  1. notoriusjt2

    Thread Starter Member

    Feb 4, 2010
    209
    0
    [​IMG]

    if D=Vo/Vs

    then 0.6=Vo/15

    Vo=9v?

    this seems like a trap
     
  2. t_n_k

    AAC Fanatic!

    Mar 6, 2009
    5,448
    782
    Your answer looks fine.
     
  3. notoriusjt2

    Thread Starter Member

    Feb 4, 2010
    209
    0
    answer C 9V is incorrect.... It was a trap I knew it!!!!
     
  4. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    The correct answer is D because it operates in the discontinous conduction mode (DCM).
    Assuming CCM operation, the maximum inductor ripple current at D=0.6 is 2.4Ap-p (in CCM) and the output current is 0.6A (9/15). Thus it is not possible to operate in CCM since the output current is less than 2.4/2. Thus, the output voltage shall be greater than 9V. Answer E is impossible, thus answer D is correct.

    If you want to calculate it:

    http://en.wikipedia.org/wiki/Buck_converter
     
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