Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!bloom-beacon!athena.mit.edu!tytso
From: tytso@athena.mit.edu (Theodore Y. Ts'o)
Newsgroups: sci.electronics
Subject: DC-DC inverter
Keywords: power supply
Message-ID: <10837@bloom-beacon.MIT.EDU>
Date: 25 Apr 89 18:52:39 GMT
Sender: daemon@bloom-beacon.MIT.EDU
Reply-To: tytso@athena.mit.edu (Theodore Y. Ts'o)
Organization: Massachusetts Institute of Technology
Lines: 22

I am trying to design an alternative power supply for a photometer (the
GR1501-A, if anyone carse).  The problem is that it requires 3 45 Volt
batteries which are almost impossible to obtain, and when they are
available, they are extremely expensive.

So what I'm trying to design is a DC-DC inverter that will take power
from a 6V latern battery (or something similar) and covert it to a +90
and -45 volt output.  Since it's going to be used to power a light
meter, the output current is going to have to be pretty will filtered.
Ideally, it should be regulated, but I have no idea how to regulate
voltages this high.  Can you get IC's that will do something like
this?  

The other constraint is that it would be best if it could be designed to
use mostly common parts, but that's not that important.

I'd appreciate any suggestions on how to design such a beast or
pointers to books or articles on the subject.  Thanks!
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Theodore Ts'o				bloom-beacon!mit-athena!tytso
3 Ames St., Cambridge, MA 02139		tytso@athena.mit.edu
   Everybody's playing the game, but nobody's rules are the same!