[sdiy] SSM2164 protection

[Oscar Salas]

David,

Neil and myself have gone forward, accordingly our recent measurements, a 1N5819 that is a 1A Schottky, will do the job.

So, if you have place for the two 1N4002 for reverse polarity protection in your PCBs, you don’t need do anything. Just place two 1N5819 instead the two 1N4002.
They will do the job of the 1N4002s (actually better because their much lower forward voltage) meanwhile will protect against negative supply fault for the SSM2164.




--- On Wed, 3/9/11, David G. Dixon <dixon at interchange.ubc.ca> wrote:

> From: David G. Dixon <dixon at interchange.ubc.ca>
> Subject: Re: [sdiy] SSM2164 protection
> To: "'mark verbos'" <mverbos at earthlink.net>, "'Neil Johnson'" <neil.johnson97 at ntlworld.com>, synth-diy at dropmix.xs4all.nl
> Date: Wednesday, March 9, 2011, 3:26 AM
> > Be careful there, David. The
> diode needs to go from -15 to 
> > ground not between -15 and the chip's supply pin.
> 
> Yeah, I realized I'd misspoken as soon as I logged
> off.  Lastnight I went
> through all my 2164-based layouts and stuck Schottky diodes
> in convenient
> places between -15V and GND.  I'll be able to kludge
> the diodes into my
> existing modules with little difficulty, and the layouts
> now include
> provision for the diodes, in case anybody else wants to use
> my boards (I do
> sell them fairly frequently).
> 
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