Snubber circuit question

Discussion in 'The Projects Forum' started by cloud623, Mar 20, 2008.

  1. cloud623

    Thread Starter New Member

    Dec 16, 2007
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    below have two switching circuits and both have connect with the diodes, anyone can tell me which circuit snubber connection is correct?
     
  2. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
    5,699
    905
    I vote for the first. For P channel, the arrow points to the Source, which is positive. For N channel, the arrow points to the Drain, which is positive. The diodes have to be reverse biased.

    Here is a good reference on snubbers. Most use a resistor-capacitor combination and not a simple diode.

    http://www.cde.com/tech/design.pdf

    John
     
  3. sandy129097

    New Member

    Mar 26, 2008
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    I think second is correct one
     
  4. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
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    905
    Could you expand on or explain a little more why you believe the second circuit is correct? John
     
  5. SgtWookie

    Expert

    Jul 17, 2007
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    1,728
    The 2nd circuit would sound like an M16A2 in "BURST" mode, as either the upper MOSFETS or the lower diodes popped in three rapid bangs.
     
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