At 10:01 AM 7/25/2011, Denny Esterline wrote:
>Ok, so I have product that has a small 12V motor running off a 48V bus.
>
>Now the face-palm moment - it needs more current (duh).

Here's an easy solution: grab beefy plastic transistor that you can=20
easily heat-sink, connect a 33V or 36V zener from collector to=20
base.  Input (+) to collector, emitter goes to load.  Use a=20
darlington transistor if zener dissipation is a problem.

No wasted power when load is off.

Its pretty simple: two components.

dwayne

--=20
Dwayne Reid   <dwayner@planet.eon.net>
Trinity Electronics Systems Ltd    Edmonton, AB, CANADA
(780) 489-3199 voice          (780) 487-6397 fax
www.trinity-electronics.com
Custom Electronics Design and Manufacturing

--=20
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