[sdiy] SSM2164 last time buys

[Neil Johnson]

Hi Oscar,

> Yes I have the same question, it would be great the solution just with one resistor. If not the other solution would be the resettable fuse. Lets see more opinions!

This kind of nicely fits in with the recent discussion about reverse
input protection, with the general consensus being resettable
polyfuses and reverse diodes.  Going from Oscar's results it looks
like a 100mA polyfuse would be enough to protect the 2164.

Hmmm.... at the lower current range the polyfuses can take several
seconds to trip.  I'd still look into adding a series resistor with a
local decoupling capacitor as  I don't think we yet know how long a
worst-case 2164 can survive on its own without the -ve rail.

Oscar: if I may ask, could you do the same experiment but this time
with the +Ve rail disappearing?  Does that have the same effect?  Or
is it _only_ the -Ve rail that needs careful monitoring?

Cheers,
Neil
-- 
http://www.njohnson.co.uk