Question about TC962 charge pump

[Ed Rembold]

I've been looking for a tidy way to get 30/36v dc from regulated 18v dc, at about 40 ma.

While digging through the Digikey catalog I found Microchip TC962CPA- 18v input, 80ma output, 24khz w/pin 6 grounded.

It sure looks like this would give approx 34.8v dc from 18v, set up as a voltage multiplier. (voltage doubled, minus 2 diode drops)

Am I reading the datasheet right?
Anyone using these things?

Thanks, Ed R.

[Ed Rembold]

bump

[Eric H]

I looked at the sheet, Ed, and am too dumb to say for sure. I've shied from those charge-pumps.
if it were me I'd probably start with a doubler, or a 18-0-18 transformer, to get the 36v up-front --like I know anything ;-)

-Eric "bump" H

[Ed Rembold]

Thanks for the reply and "bump" Eric,
I did consider using a transformer, but I didn't see one I thought would work- but I'm certainly no expert on transformers.
Thanks, Ed R.

[Eric H]

Thanks for the reply and "bump" Eric,
I did consider using a transformer, but I didn't see one I thought would work- but I'm certainly no expert on transformers.
Thanks, Ed R.

digikey has them:
http://dkc3.digikey.com/pdf/T041/1160-1165.pdf

I think I  have one around here 18-0-18 --maybe large enough.
I'm at eghensel@operamail.com