[sdiy] SSM2164 last time buys

[Tim Ressel]

A pair of 12 volt DPDT relays would do it. Or maybe a 24 volt DPDT relay would 
do. Might be worth trying out.

--Tim (relay logic) Ressel




----- Original Message ----
From: Andre Majorel <aym-htnys at teaser.fr>
To: synth-diy at dropmix.xs4all.nl
Sent: Sun, February 27, 2011 2:16:28 PM
Subject: Re: [sdiy] SSM2164 last time buys

On 2011-02-27 10:49 -0700, Scott Juskiw wrote:

> Is there a simple way to test for this "lack of negative
> supply" condition and disconnect the positive rail
> automatically before the chip becomes toast?

The V2164 is not the only chip reported to go postal when a
power rail goes away. Last week I was thinking of a way to
enforce a both-rails-or-neither rule.

Resettable fuses in thermal contact might or might not work. The
best solution I've found is a DPST 24 V relay, of the normally
open type, driven by both rails in series. Bad idea ? You tell
me.

Probably not suitable for protecting individual modules as
relays draw not insignificant current.

-- 
André Majorel http://www.teaser.fr/~amajorel/
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