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January 1st, 2012 - Adventures in Engineering — LiveJournal
The wanderings of a modern ronin.

Ben Cantrick
  Date: 2012-01-01 06:45
  Subject:   Designing an 8 amp, 75 V linear regulator.
  Mood:Achievement Unlocked
  Music:Zener - Do It (dance mix)
  Tags:  circuits

So amishx64 @ Reddit said they wanted a medium voltage, high amp regulator. Specifically, something to regulate 76 volts down to 70, and do so at a current of 8 amps(!).

To buy or to build...Collapse )

That decided, now it was mainly just a question of using the classic negative-feedback regulator architecture and adapting it to P-channel MOSFETs. I'm pretty pleased with the resulting circuit:

Falstad Circuit Sim code: http://www.gully.org/~mackys/circuits/linreg-opamp.txt

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May 2015