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Old 2nd Aug 2020, 9:13 pm   #87
dave cox
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Join Date: Jan 2009
Location: Bristol, UK.
Posts: 2,059
Default Re: High voltage regulator circuit.

Hi Andy, KSC2056 in an NPN medium power device, good for up to 800V, perfect for Q2 I would think.

I think I sent some 43V zeners, you could try one (or more as required) in series with the current source so reduce the voltage/power stress. I don't recall the power rating but the look like it must be more than 10mA will make (~0.5W?). A little bit of space round the zener will needed

dc
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