FET or IGBT?

Discussion in 'The Projects Forum' started by auvie, Dec 27, 2013.

  1. auvie

    Thread Starter New Member

    Oct 8, 2013
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    Hi all,

    My circuit has a capacitor discharging through a bunch of LEDs, with a peak current of ~150A over 5 ms (max 0.5% duty cycle). I'd like to use a FET or IGBT to switch the circuit and control pulse time, which will vary between 1ms and 5ms.

    I would like to minimize Rds voltage/resistance, with an on/off switching time in the range of tens of microseconds. Can anyone recommend a FET or IGBT that might be suitable for this application?
     
  2. ronv

    AAC Fanatic!

    Nov 12, 2008
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  3. easyeda

    New Member

    Oct 22, 2013
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    I vote IGBT.
     
  4. crutschow

    Expert

    Mar 14, 2008
    13,003
    3,232
    IGBT's have a much higher ON voltage then a MOSFET so, unless the voltage exceeds those available, I recommend a MOSFET.
     
  5. auvie

    Thread Starter New Member

    Oct 8, 2013
    25
    0
    Thanks all for your input, forgot to state the cap voltage, it's 50V. That IR part might to the trick, will take a closer look, thanks ronv.
     
  6. auvie

    Thread Starter New Member

    Oct 8, 2013
    25
    0
    wow excellent, that part has a very low Vds and Rds, almost negligible. Do you have any circuit/IC recommendations to help an AT90PWM3B drive it?
     
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