ir2110 technical question

Discussion in 'General Electronics Chat' started by khaled ragab, Aug 27, 2012.

  1. khaled ragab

    Thread Starter New Member

    Aug 5, 2011
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  2. praondevou

    AAC Fanatic!

    Jul 9, 2011
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    No. The high-side is on when the low side is off. The bootstrap capacitor is charged through the low-side switch.

    lower power switch ON = bootstrap cap is charged
    upper power switch ON = bootstrap cap discharges into the gate of the upper switch
     
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  3. khaled ragab

    Thread Starter New Member

    Aug 5, 2011
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    do you mean that the LIN is inverted to Hin?"dead time is concerned"
    if so how about the Lin signal to the other side "the pwm is set to Lin and inverted to the Hin at one side and at the other side the same lin and its inverter signal also" is it the second choice
     
  4. praondevou

    AAC Fanatic!

    Jul 9, 2011
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    Imagine a H-bridge.

    The PWM for the upper left and the lower right switch is the same.
    The PWM for the lower left and the upper right switch is the same.

    The PWM of the lower left and upper left and the PWM of the lower right and upper right are NOT the same. You can not turn on both switches of the same leg at the same time.

    EDIT:actually, depending on the type of modulation, the PWM of upper right/lower left or lower right/upper left does not need to be the same. They need to be on at the same time at one moment though. So you can work with 4 completely independent signals if you want. Just make sure you never turn on two switches of the same leg.
     
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