IR2110 question

Discussion in 'General Electronics Chat' started by MaxHeadRoom, Feb 27, 2014.

  1. MaxHeadRoom

    Thread Starter Expert

    Jul 18, 2013
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    Re http://forum.allaboutcircuits.com/newreply.php?do=newreply&p=576567

    Old Post, but does this confirm that in a MOSFET full bridge the upper FET can be kept on and the bottom switched for recharging VB?
    I get conflicting stories!
    Also lower and opposite upper cannot be kept on 100%, due to no VB generated?
    Max.
     
  2. nigelwright7557

    Senior Member

    May 10, 2008
    487
    71
    The upper capacitor is charged when the lower mosfet is switched on.
    It will eventually lose charge if not refreshed.
     
  3. MaxHeadRoom

    Thread Starter Expert

    Jul 18, 2013
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    I am getting different opinions from various sources?
    One says both upper and lower have to be PWM switched, others as the link seems to imply, that the upper side can be switched on and the low side PWM'd?
    Max.
     
  4. MaxHeadRoom

    Thread Starter Expert

    Jul 18, 2013
    10,554
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    Anyone use the Pic ECCP module with the IR2110?
    The ECCP module examples for DC motor full bridge shows one output switched high and the other modulated.
    If anyone has used this with the IR2110, what configuration did you use?
    High or low mosfet modulated, if at all?
    Max.
     
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