D
David Lesher
- Jan 1, 1970
- 0
In another group; there's a discussion about PC switcher inputs
ranges. This came up after a poster suffered from an open neutral,
and lost a lot of equipment.
A) Are their any switchers that automagicly sense the input and
change ranges? Some older Mac's are labeled "110-130 or 220-250"
vice the "110-250" of newer ones. Note I am NOT talking about units
with a {manual} voltage selector switch.
B) What's the gotcha on having a wider input range: More design
effort, to be sure, but do you also lose in efficiency, watts/cc^3,
power factor, etc? I've only read a little on switcher design &
never soldered on one. I'd assume you need to worry about the ratings
on the input L, C and other items, and the one limit is high-input
voltage, low load, [vs low, high...] cases. Other things?
ranges. This came up after a poster suffered from an open neutral,
and lost a lot of equipment.
A) Are their any switchers that automagicly sense the input and
change ranges? Some older Mac's are labeled "110-130 or 220-250"
vice the "110-250" of newer ones. Note I am NOT talking about units
with a {manual} voltage selector switch.
B) What's the gotcha on having a wider input range: More design
effort, to be sure, but do you also lose in efficiency, watts/cc^3,
power factor, etc? I've only read a little on switcher design &
never soldered on one. I'd assume you need to worry about the ratings
on the input L, C and other items, and the one limit is high-input
voltage, low load, [vs low, high...] cases. Other things?