Transistor turn on/off time

Discussion in 'General Electronics Chat' started by Nubz, Apr 15, 2015.

  1. Nubz

    Thread Starter New Member

    Apr 12, 2015
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    I understand that the more saturated a transistor is, it takes a longer time to turn off, but is there a way to calculate this? To calculate the turn on and off time? Or is a test circuit the only way?
     
  2. RRITESH KAKKAR

    Senior Member

    Jun 29, 2010
    2,831
    89
    Hello,
    What is the need to know its time diag?
     
  3. OBW0549

    Well-Known Member

    Mar 2, 2015
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    If there is a way to predict any of these things mathematically, I've never seen it; turn-on time, rise time, storage time and fall time all depend heavily on operating conditions and individual device characteristics. IMO, the best information would probably come from the device spec sheet backed up with experimental data taken under realistic operating conditions.

    That's the approach I would take, anyway...
     
  4. MikeML

    AAC Fanatic!

    Oct 2, 2009
    5,450
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    Look at the data sheet, for example the 2n4401.

    There is always simulation...
     
  5. Nubz

    Thread Starter New Member

    Apr 12, 2015
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    To help me figure out this http://forum.allaboutcircuits.com/threads/mosfet-driver-question.109687/

    I know about data sheets, I read them. But often times I want to know the reaction times of the transistor at different parameters than specified. That's why I asked about calculating.
     
    Last edited: Apr 15, 2015
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