Hi Dave, I've had luck using a Motorola MC34063A to drive up to 80V. It's basically all the buck/boost guts plus peak current sense and its own internal oscillator, it can regulate up or down based on the configuration. Check it out.
Hope this helps. P On Mon, Jul 7, 2014 at 8:50 AM, David Madden <[email protected]> wrote: > Does anybody have a favorite battery / power manager chip or module? > I'm working on a project that will be powered with 6xNiCd (7.2V). I > need 3.3v for microcontroller & Bluetooth module, straight 7.2V for > audio, and will have to boost 7.2V up to 40V to run a big > electromechanical ringer circuit. (Yes, I'm building a Bluetooth > Porto-Rotary!) > > I've used various devices to buck & boost battery voltage, but never did > anything with charging. > > I'd like to be able to charge from a USB connection (5V->7.2V). AIUI, > you can trickle-charge NiCd at C/10 indefinitely, so my plan is to > charge whenever USB-Vbus is available. If the batteries get really > depleted, I can open the case and fast-charge them with a big charger. > > Any suggestions? > -- > Mersenne Law LLP · www.mersenne.com · +1-503-679-1671 > - Small Business, Startup and Intellectual Property Law - > 9600 S.W. Oak Street · Suite 500 · Tigard, Oregon 97223 > > > _______________________________________________ > dorkbotpdx-blabber mailing list > [email protected] > http://music.columbia.edu/mailman/listinfo/dorkbotpdx-blabber >
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