>>>>Input range is 20-48 and required
>>>>output is 12vdc @ 10Amps with a max of say 15-20A.
>
>Can you tighten up that spec?  15-20A for how long?  With what
>sort of behavior on the output voltage?  Otherwise, you're looking
>at a 12V@20A power supply, which is twice the nominal 12V@10A...

I need 10 amps (prob 99%)  but it should be capable of higher peaks
without letting the smoke out. The input voltage is going to be from 20-48
and not steady. I have no control over that one. I did look at telcom stuff
but the input seems pretty fixed around 48.

Switching type is the only way to go on this as far as I can tell. It would be
nice to keep the efficiency pretty high and the heat low. I caught myself 
looking
at Romans circuit the other night wondering if a few different bits might make
it work. Anyway just was hoping someone knew of something so I wouldn't
have to slowly reinvent the wheel.

Dave



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