Snubber circuit question

Thread Starter

cloud623

Joined Dec 16, 2007
9
below have two switching circuits and both have connect with the diodes, anyone can tell me which circuit snubber connection is correct?
 

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jpanhalt

Joined Jan 18, 2008
7,687
I vote for the first. For P channel, the arrow points to the Source, which is positive. For N channel, the arrow points to the Drain, which is positive. The diodes have to be reverse biased.

Here is a good reference on snubbers. Most use a resistor-capacitor combination and not a simple diode.

http://www.cde.com/tech/design.pdf

John
 

SgtWookie

Joined Jul 17, 2007
22,201
The 2nd circuit would sound like an M16A2 in "BURST" mode, as either the upper MOSFETS or the lower diodes popped in three rapid bangs.
 
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