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Subject: Re: Diode Reverse dV/dT Problem

Date: 06/30/02 at 12:00 AM
Posted by: Ron Harrison
E-mail: rmaxh@yahoo.com
Message Posted:

In Reply to: Re: Diode Reverse dV/dT Problem posted by John Dunn - Consultant on 06/28/02 at 5:21 PM:

John, I understood this document to say that, under high load conditions, the diode accumulates more stored charge, causing the slew rate of the reverse bias voltage to be relatively low. Under low load conditions, the stored charge is low, and can be swept out of the diode rapidly, causing relatively high reverse dv/dt. This high slew rate, reacting with the inductance in the circuit (and, of course, the diode capacitance and other parasitic capacitance), can cause ringing (overshoot) which may result in avalanche in the DIODE. Read pages 4 & 5 again. it explicitly says this.

Ron H


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