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From: "petrus bitbyter"
Subject: Re: Two diodes in series to double PIV rating - is that a "no-no"?
X-Newsreader: Microsoft Outlook Express 5.50.4807.1700
Date: Thu, 21 Nov 2002 14:45:47 GMT
NNTP-Posting-Date: Thu, 21 Nov 2002 15:45:47 MET
Organization: chello broadband
You can think of splitting up your secondary, rectify them separately and
add both DC's.
"Klaus Vestergaard Kragelund" schreef in bericht
> I have designed a low power flyback supply and I'm using a BAV74 diode for
> one of the secondary outputs.
> Trouble is that the PIV (Peak Inverse Voltage) on the diode is very close
> the allowable rating for the diode. Is it possible to connect two in
> (like the BAV99 series- two diodes on one die) to increase the PIV rating?
> Will the applied voltage split approximately equally between the diodes -
> even at fast switching?
> I would suspect that if one of the diodes has a higher reverse leakage
> current from the "get go" - then the bulk of the voltage would be
> on the other diode. But when the voltage on the other diode rises - so
> the leakage and possibly a equlibrium would exist. Anyone?
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