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From: Spehro Pefhany
Subject: Re: Using the body diode of a MOSFET to protect against relay back EMF
References: <email@example.com> <firstname.lastname@example.org>
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Date: Tue, 21 Jan 2003 15:56:36 GMT
NNTP-Posting-Date: Tue, 21 Jan 2003 10:56:36 EST
On Tue, 21 Jan 2003 09:41:07 -0600, the renowned Crusty Curmudgeon
>I'm not too wild about just a catch diode across the coil. The dv/dt on flyback
>can still trash the gate. I like to add a series 100R and .001uF in shunt with
>the coil to limit the dv/dt to something safe. It also keeps the voltage spike
>induced in adjacent paths and wiring to a minimum.
How about just slapping a 10n across the MOSFET (plus the diode)?
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