8 Oct
2016
8 Oct
'16
11:07 a.m.
A WELL-KNOWN problem with Tantalum caps is that if run
in equipment for
some time, then put on the shelf for some years, then powered up again,
the caps will fail, often spectacularly. Sometimes, in things like memory
boards, you will have to replace many caps. Likely, just the cap is bad,
if it is
on an externally-supplied power rail. Supposedly, if
you were to ramp up
the
supply voltage slowly, it would allow the cap's
dielectric to reform
gracefully.