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From: Tony Williams
Subject: Re: Two diodes in series to double PIV rating - is that a "no-no"?
Date: Wed, 20 Nov 2002 23:00:25 +0000 (GMT)
NNTP-Posting-Date: Wed, 20 Nov 2002 23:03:06 +0000 (UTC)
User-Agent: Pluto/1.14i (RISC-OS/3.60)
In article <firstname.lastname@example.org>,
Klaus Vestergaard Kragelund wrote:
> 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?
I suspect that the voltage across the lower leakage
diode could cause it to avalanche. Going into an
avalanche state would then snap most of the voltage
across the second diode.... it too will avalanche.
Both diodes now in a low impedance avalanche state.
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