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From: gordonl@microsoft.UUCP (Gordon Letwin)
Newsgroups: sci.electronics
Subject: need electroluminescent power supply
Keywords: electroluminescent power
Message-ID: <1176@microsoft.UUCP>
Date: 7 Nov 88 18:36:37 GMT
Organization: Microsoft Corp., Redmond WA
Lines: 20

I have an LCD which is backlit by an electroluminescent panel.  These
things take a few milliamps of AC in the 60 to 80 V range, 60 hz to
400 hz, typically.

This is part of a battery backed up system.  I can brute force design
a 12V DC to 70 VAC convertor, but it's crude and complex: an oscillator
driving a voltage doubler chain followed by 2 complementary pairs to
couple the panel's leads to the + and - DC, alternately, producing
AC square wave.

A small transformer would be better, and would guarantee true AC, but
I'm having troubles locating an appropriate one.

I've heard that there are small power supplies designed to drive these
devices - DC to AC convertors of appropriate voltage and current.  Does
anyone have any pointers on these devices and where they might be obtained?

	thanks

	gordon letwin
	microsoft