Pwr. Supply spec

Here's something I never noticed before. Spec on a brand chosen
randomly, Antec, shows a spec for 'Transient Response' as:

"..returning to within 5% in less than 1ms for 20%
load change.

Don't know how much variation there is between brands but I find
this interesting, since the spec is loose enough to allow for, say,
a substantial dip or spike during the 1ms. hmm...
fried substrate, anyone?

"OSbandito" wrote in message
...
Here's something I never noticed before. Spec on a brand chosen
randomly, Antec, shows a spec for 'Transient Response' as:

"..returning to within 5% in less than 1ms for 20%
load change.

Don't know how much variation there is between brands but I find
this interesting, since the spec is loose enough to allow for, say,
a substantial dip or spike during the 1ms. hmm...
fried substrate, anyone?

The cause of damage (during power fluctuations) is increased current/heat.
That's why a brownout is more harmful to electronics than a blackout. The
blackout will cause a fluctuation in current momentarily, but the brownout
can cause increased current for some length of time, which is very harmful.

Even with a substantial dip or spike, you are talking about 1ms. That won't
do much harm. -Dave

Dave wrote
OSbandito wrote

Here's something I never noticed before. Spec on a brand chosen
randomly, Antec, shows a spec for 'Transient Response' as:

"..returning to within 5% in less than 1ms for 20%
load change.

Don't know how much variation there is between brands but I find this interesting, since the spec
is loose enough to allow for, say, a substantial dip or spike during the 1ms. hmm...
fried substrate, anyone?

The cause of damage (during power fluctuations) is increased
current/heat. That's why a brownout is more harmful to electronics
than a blackout. The blackout will cause a fluctuation in current
momentarily, but the brownout can cause increased current for some
length of time, which is very harmful.

Pity the above is talking about a LOAD change.

Even with a substantial dip or spike, you are talking about 1ms. That won't do much harm.

Depends on how substantial the spike is.

"OSbandito" wrote in message
...
Here's something I never noticed before. Spec on a brand chosen
randomly, Antec, shows a spec for 'Transient Response' as:

"..returning to within 5% in less than 1ms for 20%
load change.

Don't know how much variation there is between brands but I find
this interesting, since the spec is loose enough to allow for, say,
a substantial dip or spike during the 1ms. hmm...
fried substrate, anyone?


Dave unleashed his nanobots with:

The cause of damage (during power fluctuations) is increased current/heat.
That's why a brownout is more harmful to electronics than a blackout. The
blackout will cause a fluctuation in current momentarily, but the brownout
can cause increased current for some length of time, which is very harmful.

Even with a substantial dip or spike, you are talking about 1ms. That won't
do much harm. -Dave

Yer probably right. Most of the circuits supplied by the pwr.supply
ought to have decent filter caps, zener, whatever. I've seen a lot of
noisy ****, though, over the years. Mostly analog but same principle.
Crappy caps are pointless cost-cutters, in my view. A good smaller-size
filter cap, in bulk qty, is only a few cents more expensive than a
tinny, mud-stuffed cheapie.