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From: Chris Carlen
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.1) Gecko/20020826
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Subject: Re: Flyback ringing examined further
References: <3DB0CAF1.5010904@BOGUS.earthlink.net> <3DB178E3.DF096A96@rica.net>
Date: Sat, 19 Oct 2002 17:08:30 GMT
NNTP-Posting-Date: Sat, 19 Oct 2002 10:08:30 PDT
John Popelish wrote:
> Thanks. This makes it clear that I was wrong about the gate voltage
> being involved in the waveform. The nonlinear capacitance of the body
> diode is certainly distorting the apparent center of the ring
> oscillation until the amplitude gets small. Thanks for posting this.
> I learned something.
> Next question that comes to my mind would be how to design a snubber
> to transfer the ring energy to somewhere else than the body diode
> without much increasing the overall losses (or even reducing them).
From what I understand, this can't be done with this simple "textbook"
Bob Wilson referred me to a two-transistor flyback, which also requires
a transformer, which can do this.
It's title is "Design Review: 150W Current Mode Flyback".
Good luck finding it on TI's site, their search engine sucks, or perhaps
the data that has been fed into it.
If you want I'll email it to you.
Christopher R. Carlen
Suse 7.3 Linux 2.4.10
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