Is it possible to derive a negative 12VDC rail from a positive 12VDC power source? I need it to supply 100ma current.
IOW to power an op amp with +/-12VDC rails.
Is there a single DIP package that will do this?
I have done a bit of looking on the web, but am unsure of the best solution.
Martin King
As in no external components? That would require a hybrid.
There are only two schemes: charge pump and switcher. At 100ma, I'd be using a switcher.
The best solution is a +/-12V power supply.
Murata has a line of 4-pin isolated DC-DC converters. The NKE1212 will only give 83 mA. The NML1212 is a bit more expensive, but will give you twice the current. You can get these from Digi-Key. I use some similar units from the same family. Note they are not current-limited or regulated. If you short the output, they fry.
Jon
80ma -
CHeers
-- http://cds.linear.com/docs/en/design-note/dn435f.pdf JF
Get cancer and DIE a horrible death.
Oh yes. This is it. And not expensive either.
Martin King
These are nice too. But all surface mount. I am still trying to use up my tube sockets.
Martin King
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