Wednesday 9 January 2019

What is the reverse recovery time in a diode?



What is the reverse recovery time in a diode?



Answer



If a diode is conducting in a forward condition and immediately switched to a reverse condition, the diode will conduct in a reverse condition for a short time as the forward voltage bleeds off. The current through the diode will be fairly large in a reverse direction during this small recovery time.


After the carriers have been flushed and the diode is acting as a normal blocking device in the reversed condition, the current flow should drop to leakage levels.


This is just a generic description reverse recovery time. It can affect quite a few things, depending on context, as mentioned in the comments.


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