From: "Tom Faloon"
Subject: Re: Choosing a MOSFET Driver
Date: Thu, 3 Oct 2002 10:52:57 +0100
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NNTP-Posting-Date: Thu, 3 Oct 2002 09:47:37 +0000 (UTC)
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What is the switching frequency?
What is load impedance? (Or at least is it predominately resistive or
Bill yg wrote in message
> "Tom Faloon" wrote in message
> > Bill,
> > You didn't say much about your application, or how you specified the 5uS
> > switching time, which is relatively slow.
> > The IRF 830 has potential to handle a lot of power, (It's rated for 500V
> > 4.5A), so the following may be relevant.
> > Slow switching times can contribute to significant heating if the device
> > being turned on / off repeatedly, because, during transitions, it has
> > current flowing in it AND appreciable voltage across it. This is not a
> > problem for occasional switching, but can become a problem at relatively
> > repetition rates.
> > If you are switching repetitively, estimate the power dissipation due to
> > switching, before choosing a driver.
> > (Because power dissipation may dictate faster switching, and so has a
> > bearing on what driver you need.)
> > Tom Faloon
> > http://www.faloon.co.uk
> Sorry for forgetting to mention that I will be switching the device
> repetitively, withstanding a off-voltage of about 400V and a
> on-current of about 2A.
> Also, how would you compare the difference between TPS2811 and