connecting a single chanel driver to an IGBT

Discussion in 'General Electronics Chat' started by kanoun, Apr 10, 2015.

  1. kanoun

    Thread Starter Member

    Jan 29, 2015
    41
    0
    Dear All
    I'm trying to make swich measurement on an IGBT and I'm getting a hard time to connect the driver. you can see in the attachement the setup I did. Could you please help and comment. just for information:
    the output of my timer is 200µs at 7V and 50ms at 0V.
    the driver I'm using is this one http://www.irf.com/product-info/datasheets/data/irs2117pbf.pdf
    Many thanks
     
  2. crutschow

    Expert

    Mar 14, 2008
    12,987
    3,226
    Are you using the IRS211(7,8) or the IRS21171 driver?
    The first two require a minimum of 9V logic level to give a high output level.
     
  3. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,507
    2,367
    How come you are using a high side driver for a simple single mosfet?
    Max.
     
  4. kanoun

    Thread Starter Member

    Jan 29, 2015
    41
    0
    do you agree with the set up ?
     
  5. kanoun

    Thread Starter Member

    Jan 29, 2015
    41
    0
    it is not allowed ? I'm new in this area so please help :)
     
  6. dl324

    Distinguished Member

    Mar 30, 2015
    3,234
    619
    Hi kanoun,

    Why don't you just drive the transistor controlling the relay directly from the 555 timer? The timer can sink/source 200mA.
     
  7. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,507
    2,367
  8. kanoun

    Thread Starter Member

    Jan 29, 2015
    41
    0
    I need more current
     
  9. kanoun

    Thread Starter Member

    Jan 29, 2015
    41
    0
  10. crutschow

    Expert

    Mar 14, 2008
    12,987
    3,226
    You didn't answer my question, so I can't answer yours.
     
  11. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,507
    2,367
    What is the nature/type of load you are switching.?
    Max.
     
  12. dl324

    Distinguished Member

    Mar 30, 2015
    3,234
    619
    Don't understand. The timer would be driving the transistor you're using to switch the inductive load. What needs more current?
     
  13. kanoun

    Thread Starter Member

    Jan 29, 2015
    41
    0
    that could be the problem :) I'll try the 10 V or more :)
     
  14. kanoun

    Thread Starter Member

    Jan 29, 2015
    41
    0
    one more probleme with the timer I was not able to go further thant 8 V as input ... beyond 7.5 V the signal deasappear ... Very strange but right :(
     
  15. kanoun

    Thread Starter Member

    Jan 29, 2015
    41
    0
    inductance
     
  16. kanoun

    Thread Starter Member

    Jan 29, 2015
    41
    0
    now could you answer :)
     
  17. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,507
    2,367
    Still not sure why the IR High side switch, it seems redundant?
    Max.
     
  18. kanoun

    Thread Starter Member

    Jan 29, 2015
    41
    0
    IR ? what do you mean ?
     
  19. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,507
    2,367
    IRS211 single high side driver. Usually intended for high side Mosfet operation.
    Your load is shown in the Drain/collector so direct drive from the 555 should be possible.
    Max.
     
  20. kanoun

    Thread Starter Member

    Jan 29, 2015
    41
    0
    Yes you are right but I want to use the gate driver because for two reasons
    with the 555 the signal deasappear once the Vin is larger than 7.5V
    my device needs Ig abaout 1A to swich correctly and the 555 is not able to delivre such a current
     
Loading...