My board killed three IR2110 ICs...... Help Plz

Discussion in 'The Projects Forum' started by onlyvinod56, Jul 1, 2016.

  1. onlyvinod56

    Thread Starter Active Member

    Oct 14, 2008
    362
    1
    Hello All....
    I was trying to design a H-Bridge inverter and started with one leg driver IR2110. Based on the datasheet and some blogs, I build the circuit and tested.
    See the attachment. First i got the low side pulses across the lower mosfet (gate and source). No pulses on high side. After some trials, periodically Vcc and common are getting short circuited. I tried with three ICs and all got fried. Any suggestions.??

    Attachment 1: IMG_20160701_154306.jpg Left side supply (VCC and COM) is showing overload
    Attachment 2: IMG_20160701_154350.jpg IR2110 board with ARDUINO as controller (pulse period is 10ms)
    Attachment 3: IMG_20160701_154412.jpg Tried with another board.... same results
    Attachment 4: IMG_20160701_154435.jpg Total three boards with three ICs failed
     
  2. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
    5,681
    900
    Can you post your schematic? Is your "load" a dead short?

    John
     
  3. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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  4. onlyvinod56

    Thread Starter Active Member

    Oct 14, 2008
    362
    1
    IR2110 - 2.png
    I did not connect any load. I just connected two LEDs (LED + limiting resistor) across each MOSFET's gate and source.

    One more thing, in place of UF4007, I used MUR1100 diodes.
     
  5. onlyvinod56

    Thread Starter Active Member

    Oct 14, 2008
    362
    1
    ThankQ... I will check it out
     
  6. Lestraveled

    Well-Known Member

    May 19, 2014
    1,957
    1,215
    I absolutely agree with @Alec_t . The Fairchild AN-6076 is an excellent description of what is happening. Look at Figure 18 in the app note.

    Here is an example
    [​IMG]
     
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