On Wednesday 09 April 2003 09:45 am, Bob Blick wrote:
> Frank Collingwood said:
> > There's quite a few ESC projects out there on the web, but most
> > of them do not fit what I want to do, as they require MOSFET
> > drivers which require more V than a standard 7.2V battery can
> > give.
> > I need to try to find an H-Bridge N-Channel MOSFET only design
> > that can quite happily work of a 7.2V battery. Even better if the
> > Servo signal -> PWM side of things has been written.
>
> If all you want is a conventional ESC, just buy one. They cost less
> than the sum of their parts. If you need something special, and
> want to build your own H-bridge, consider the LT1158, but it's
> expensive. It does, however, generate gate voltages and operates
> down to 4.5 volts.

There are a number of H-Bridge chips out there that will work if you
can come up with the PWM.

I've recently been looking at the Motorola MC33886 (and MC33887 which
isn't out yet) chips; these can work down to 5 V and supply 5.2 A.

http://e-www.motorola.com/webapp/sps/site/prod_summary.jsp?code=MC33886
http://e-www.motorola.com/webapp/sps/site/prod_summary.jsp?code=MC33887

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Ned Konz
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