Print Page - Question about TC962 charge pump

Title: Question about TC962 charge pump
Post by: Ed Rembold on March 30, 2004, 12:21:47 PM

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.

Title: Question about TC962 charge pump
Post by: Ed Rembold on March 31, 2004, 11:21:33 AM

bump

Title: Question about TC962 charge pump
Post by: Eric H on April 02, 2004, 12:15:41 PM

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

Title: Question about TC962 charge pump
Post by: Ed Rembold on April 03, 2004, 08:34:46 AM

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.

Title: Question about TC962 charge pump
Post by: Eric H on April 03, 2004, 01:41:44 PM

Quote from: Ed RemboldThanks 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

DIYstompboxes.com

DIY Stompboxes => Building your own stompbox => Topic started by: Ed Rembold on March 30, 2004, 12:21:47 PM