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Subject: Re: Question about linear derating factor for MOSFETs
Date: Mon, 11 Nov 2002 12:42:33 +0000 (UTC)
References: <email@example.com> <firstname.lastname@example.org> <email@example.com> <firstname.lastname@example.org> <2DJz9.email@example.com> <firstname.lastname@example.org>
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In sci.electronics.misc John Muchow wrote:
> With my limited experience, that sounds pretty reasonable. I did all
> my calculations for a 100-degree C. junction temperature (150C max
> rating)...I'm hoping that there's enough headroom to handle the
> gradient across the sink.
> I'll be redoing the calculations with that more realistic case-to-sink
> resistance value you gave me too.
> Sounds like I'm going to have to prototype this thing up soon and
> start some temperature measuring. Just wish the parts didn't cost so
> much. :-(
Heatsinked power resistors are (relatively) cheap.
This gives you some confidence in your numbers, before connecting the
really expensive smoke containers.
http://inquisitor.i.am/ | mailto:email@example.com | Ian Stirling.
Among a mans many good possessions, A good command of speech has no equal.
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