At 12:22 AM 6/30/99 -0300, you wrote:
>        Does anyones have a good idea on how to make a digital controled
power supply (a good one), I've already see the example on National's LM317
datasheet, but I'm looking for something better.
>        Thanks all for your answers.
>
>        Mauricio Jancic
>        VARIMAK S.A.

Try feeding the voltage output of a DAC into a Power op-amp.  Lots of good
ones out there that can handle tens of amps at tens of volts.  Works great
for me.  If you feed the power op amp with bipolar supplies you can get a
positive and negative going supply.  Great for driving Peltier coolers for
precise temperature control, etc.  Not to mention destructively testing
things.

Kelly

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William K. Borsum, P.E.
OEM Dataloggers and Instrumentation Systems
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