4 Jun
2005
4 Jun
'05
3:40 p.m.
Don't worry too much about ripple on an S100
supply. The S100 supply is
not regulated -- the regulators are on each of the boards (the 8V input
is designed to be regulated down to 5V, etc). The regulators should take
care of small amounts of ripple on the backplane supply lines.
Agreed: Rich, what I ment when I told you to check for ripple, would be
"big" ripple, which would be an indication of the filter caps having
dried out - not all that likely, but worth checking. The input to the
regulators should not drop below 7v under load.
I always scope supplies under initial load tests - You never know what
odd things you might see...
Regards,
Dave
--
dave04a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
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