I have actually seen switching power supply designs that will not
work properly with low-ESR capacitors.? The power IC manufacturer
was using the higher resistance for stability in the feedback loop,
IIRC.
That said, these designs all came out in the late '90s or early
'00s, long after the TX816 was designed, so I don't think it's a
problem here.? But it just goes to show:? if some phenomenon exists,
however 'undesirable' to most, some designer somewhere will find a
use for it!?
;-)
Regards,
-BW
Bruce Wahler
Ashby Solutions.com?
bw@...
978.597.7008
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?
I depends on the design of the PSU.? In some cases, low
ESR capacitors are specified in the datasheet of the
voltage regulator chip, so that's what you need to use.
I can't think of a reason why replacing a higher ESR
capacitor with a low ESR one would be a problem.? Doing it
the other way around definitely can be a problem - at the
very least, doing it to a PSU could cause more ripple or
hum.? At worst, it could destabilise the voltage regulator
and do a lot of damage.
Personally, I'd count most of the "cost" of a repair like
that in terms of my time to do it.? Spending more on the
components isn't likely to bankrupt you.? Using better
specification ones makes it less likely that you'll have
to do it again any time soon.
Andy
