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Old 8th Jul 2020, 11:16 am   #31
dave cox
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Join Date: Jan 2009
Location: Bristol, UK.
Posts: 1,468
Default Re: High voltage regulator circuit.

Andy, I knocked this up quickly last night, just an idea to see what it would involve without using too many parts. Looking at it now I could probably use 1 less transistor.

There are multiple problems as it is.
it will only work down to ~35V and the regulation is not brilliant (~ a volt at 350V).
Having 350V across a pot anyone ?
I didn't have a MOSFET model so used a bipolar for the series element.
The top right current source will be a pain, the others can be replaced with resistors (one sinking several watts).

There must be a better way ...

dc

PS I tried to attach the model but I couldn't upload it
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