apply dc to full wave bridge

Discussion in 'General Electronics Chat' started by Leecavturbo, Nov 5, 2013.

  1. Leecavturbo

    Thread Starter New Member

    Feb 2, 2013
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    What happens if you apply dc where normally ac is on a full wave bridge rectifier?
     
  2. MrChips

    Moderator

    Oct 2, 2009
    12,421
    3,356
    Nothing unusual. The DC voltage will see its way through the bridge.

    This is a commonly used technique to prevent damaging a circuit if battery polarity is inadvertently reversed, i.e. the circuit still functions regardless of which way the battery is connected.
     
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  3. tubeguy

    Well-Known Member

    Nov 3, 2012
    1,157
    197
    +1 You will notice a DC voltage drop equal to the forward voltage of 2 diodes.
     
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  4. wayneh

    Expert

    Sep 9, 2010
    12,093
    3,030
    And all of the load's current will pass through just two diodes instead of 4, possible exceeding the rating of those diodes.
     
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