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Old 7th Jul 2020, 4:46 pm   #28
dave cox
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Join Date: Jan 2009
Location: Bristol, UK.
Posts: 1,468
Default Re: High voltage regulator circuit.

Yea, the original design (and I agree, pretty much the same as the one I saw from the Sussex) will drift thermally and with load current. My mod for 'fold-back' would make that much worse since it increases the output resistance (in order to get enough voltage drop to reduce the current into a short circuit).

To get better performance you will need feedback but that doesn't have to be an op-amp

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