[sdiy] Low supply voltage monitoring..

[Neil Johnson]

Barry Klein wrote:
> here was some discussion
> about the SSM2164 and supply loss causing failure so you need to look at
> this in the module design and test it for loss of each bus voltage.

For the SSM2164 you just need to add a Schottky diode between the -ve
pin (A) and GND (K) to protect it against the negative rail
disappearing.  Missing positive rail does not cause failure.

Neil
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