Posted on Sep 11, 2012

In this circuit, a TU31 shunt regulator is used to sense the output voltage. The TU31 drives the LED of a 4N28 optocoupler which provides feedback to the MAX641 while maintaining isolation between the input, +12 V, andJhe output, +15 V.

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ln this circuit, the +15 V output is fully regulated with respect to both line and load changes.

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