Bob Blick wrote:
>=20
> On Mon, Nov 19, 2012, at 03:03 AM, David Meiklejohn wrote:
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> > The key is to have something that is driven from those 4 full-bridge
> > PWM outputs, demonstrating forward and reverse operation as defined
> in
> > the PIC data sheet. =20
>=20
> There are lots of H-bridges that work the way you want. Rohm and
> Toshiba make many models, here's one that I have doing positioning in
> thousands of lasers:
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> http://www.digikey.com/product-detail/en/BA6287F-E2/BA6287F-E2CT-
> ND/1158676

Thanks Bob.  Useful devices.

They are the sort of thing I've been seeing - they seem to have only 2
inputs (IN1 and IN2) - there is a logic table showing how they relate to
forward, reverse, brake and stop.

Am I missing something?  I'm looking for something that would be driven by
the 4 PWM pins on an ECCP module configured in full-bridge mode.

The only solution I've seen so far, for properly demonstrating those forwar=
d
and reverse full bridge modes, is four FETs (whether in 4 separate packages=
,
or 2 or 1) wired as an H-bridge.


Cheers,
David



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