Mosfet Turn-on Transient Question(s)

Discussion in 'Analog & Mixed-Signal Design' started by BearSub, Jan 11, 2018.

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  1. BearSub

    Thread Starter New Member

    Jan 11, 2018
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    Referring to the graph below, why is it that when a Mosfet turns on, Vds does not decrease until the channel is supporting the full-load current? From my understanding, Vds should start decaying as soon as Vgs equals Vth of the Mosfet but that is not the case.

    From the research that I have done, I found that this is at least partly due to the behavior of a diode (I am assuming that the diode being referred to here is the freewheeling diode of an clamped inductive load?), but that does not seem clear me at all.

    Mainly, I am just trying to get a better understanding of how Mosfets works, particularly in relation to power supply design.

    upload_2018-1-11_15-34-15.png

    Edit: Forgot to add the graph.
     
  2. BearSub

    Thread Starter New Member

    Jan 11, 2018
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    I was able to find another thread on this forum regarding this topic and so I will refer to it. My mistake.
     
  3. ScottWang

    Moderator

    Aug 23, 2012
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    Which thread you are referring to?
    (Your answer maybe useful for other members, after you answer the question and then this thread will be closed)
     
  4. BearSub

    Thread Starter New Member

    Jan 11, 2018
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    ScottWang likes this.
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