MOSFET and IR2101 Driver

Discussion in 'General Electronics Chat' started by yangshuai, Jun 26, 2008.

  1. yangshuai

    Thread Starter New Member

    Jun 26, 2008
    1
    0
    I have some problem on MOSEFT and IR2101 driver. I connected the high side driver to the gate of MOSFET IRF640 and a 1K resistor to the source of the MOSFET. But the MOSFET is always turning on after power up. I have been trying this circuit for three weeks already. :(But still cant finds the reason... I have try the driver separately by connect a square waveform to Vs of the driver. And I also tried out the MOSFET separately. Both are working fine. But it is just not working when I connect them together. Is it due to the matching problem? The driver has a 50nS max delay matching. Should be enough for most of the MOSFET.
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Can you post up a schematic of your circuit? Without that, all we can do is guess.
     
  3. sudharshan.panduranga

    Active Member

    Apr 10, 2008
    61
    1
    How many mosfets r u using in the O/P of the IR2110 driver.
    Just send the schematics.


     
  4. h.d

    Active Member

    Oct 22, 2007
    150
    0
    in that MOSFET if you dont give the gate zero voltage the mosfet will go on
    sho you should connect it with zero volt to make the MOSFET off status
     
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