Re: DC Motor Control: H-Bridge +5A, 48v

Mike wrote:

I'm looking for a h-bridge that can handle in excess of 5A continuous,
48v.  I would really like to find something with these capabilities
that uses SPI to communicate with a microprocessor.

Any ideas, anyone? Thanks.

We looked into something like this a few years ago; at that time nobody made monolithic parts that are rated for more than 40V or so, and I doubt the situation has changed. Apex makes hybrids that will drive that sort of voltage with a logic input, but they're $$$ -- sensible if you're making a few and want to save on engineering, but not if you're making a lot.

Hopefully someone has made or will make a controller for this where you can add a couple of FETs and get a half-bridge. It certainly makes sense given that the automotive market is going over to 42V rails.

As far as SPI to a microprocessor goes -- good luck! Your best bet will probably be to put an itty bitty micro right next to a plain old amplifier.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com
.

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