>I'm looking for nearly the same thing but for a 30-volt, 15-amp
>reverse capable PWM speed controller for brushed-DC permanent
>magnet type motors. The +-30V is going to be supplied by a big
>ni-cd pack.
>I've looked around on the PIClist site and found some promising things
>but they seem to lack reversability. Ideally, it'd be able to brake the
>motors with a PWM-to-ground short circuit type mechanism instead of
>trying to apply opposing voltage to get the motors to stop.

This is exactly the area that the Intersil HIP4080 is great for. Colleagues
of mine are using these to build a PWM driver to go on space craft to
operate from 29V supply. In our case we need 10A peak, but for your use just
use beefier output FETs. You will have the advantage of being able to use
the most recent fast switching/low input capacitance FETs that will suit.

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