The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
From: Mike Harrison
Subject: Re: Two diodes in series to double PIV rating - is that a "no-no"?
Organization: White Wing Logic
X-Newsreader: Forte Agent 1.9/32.560
Date: Wed, 20 Nov 2002 23:51:23 +0000
NNTP-Posting-Date: Wed, 20 Nov 2002 23:51:46 GMT
This should be fine - high voltage diodes are often made using
multiple diodes, or diode die, in series.
However by putting 2 diodes in series you may lose efficiency due to
increased forward voltage, and you may be better off using a higher
On Wed, 20 Nov 2002 22:29:28 -0500, "Klaus Vestergaard Kragelund"
>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 to
>the allowable rating for the diode. Is it possible to connect two in series
>(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 impressed
>on the other diode. But when the voltage on the other diode rises - so does
>the leakage and possibly a equlibrium would exist. Anyone?
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup