14 Feb
2010
14 Feb
'10
9:43 p.m.
On 14 Feb 2010 at 20:44, dwight elvey wrote:
Most designs use them for bypass caps. These tend to
be way over
designed so that even an old dry one or two make little
difference.
Where I've seen most of the failures is where they're used on
switching supplies as filter capacitors. With the high ripple
frequency, I suspect it's a problem with a too-high ESR that
eventually causes these to destruct. Filter caps on linear line-
frequency supplies generally last a lot longer, though even they dry
out eventually.
--Chuck