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From: Jim Stockton
Subject: Re: Recommend a flyback IC?
Date: Thu, 19 Sep 2002 11:03:00 -0500
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I have been using the SI9110 from Vishay Siliconix in downhole power
supplys for years with very good success. It requires an external switch
fet. I probably would try using an inductor alone in boost configuration
if you don't need output isolation. I would use a 500V external fet.
"Christopher R. Carlen" wrote:
> Since there are 1000s of switcher controller ICs out there, I figured
> there'd be a good chance you folks could narrow down my choices a bit if
> I ask here first.
> I want to make a supply that will produce an adjustable 100-300VDC at up
> to 25mA. If it's too out of the ordinary to make an adjustable supply
> with typical chips, then maybe I could reduce the range to about
> 150-250VDC. Worst case I need a constant 200VDC. The input power will
> be raw rectified and capacitively filtered DC from about 12-24V.
> Efficiency doesn't have to be stellar, >75% would be great, but I could
> tolerate a little less. Output ripple and regulation don't have to be
> lab-grade either, about 1% all around would be great.
> Any tips?
> Thanks for comments.
> Good day!
> Christopher R. Carlen
> Principal Laser/Optical Technologist
> Sandia National Laboratories CA USA
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