From: "Tom Faloon"
Subject: Re: tiny inverter driver
Date: Wed, 2 Oct 2002 20:33:36 +0100
NNTP-Posting-Date: Wed, 2 Oct 2002 19:28:21 +0000 (UTC)
X-Newsreader: Microsoft Outlook Express 5.00.2615.200
How much current at 800 Volts?
John Larkin wrote in message
> I'm helping a very nice guy I know to develop an electro-optical
> module. He has a really cool optically-active material, but it needs
> high voltage.
> We're putting together a demo that needs to look all nice and
> packaged, 5-volt only input, which means I have to squash, among other
> things, a 0-800 volt power supply into the thing. I'm probably going
> with a classic dual-fet foreward DC/DC converter, and I'm currently
> figuring on a SOT-23 schmitt gate RC oscillator driving a Tiny Logic
> flipflop driving a pair of SOT-23 fets, finally driving the
> center-tapped transformer primary. The transformer will be a 7 mm dia
> ferrite pot core, followed by a C-W multiplier. All this, plus the
> optics, in about the footprint of an eprom. Whew.
> So my question: does anybody know of a gadget that would replace the
> oscillator/flipflop mess? Or know of any other cool but *very small*
> inverter drivers? There are some small flyback driver chips, but a
> flyback is less transformer-efficient.
> Any other suggestions appreciated. Hey, it's not as if I'm doing this
> for money.