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NNTP-Posting-Date: Wed, 20 Nov 2002 16:03:36 -0600
From: "Charles Schuler"
Subject: Re: Two diodes in series to double PIV rating - is that a "no-no"?
Date: Wed, 20 Nov 2002 17:03:33 -0500
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Use parallel 100,000 ohm resistors to equalize the reverse voltage drops.
"Klaus Vestergaard Kragelund" wrote in message
> 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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