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Old 20th January 2002, 09:06 PM   #11
paulb is offline paulb  Canada
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Join Date: Jun 2001
Location: Calgary
Kilowatt,
Your idea is a charge pump. It's used in various ICs like the MAX232 interface, which as a side effect of its interface requirements generates +/-10V from a +5V supply.
Check the Maxim website for some of these ICs. I don't think they scale up to the level you're wanting, but I don't know why. I suspect it might have to do with the peak charging current and losses in the capacitors, but I've never really looked into it. It seems to me the highest I've seen was around 200 mA output.
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