Hero999 Posted June 12, 2010 Report Share Posted June 12, 2010 Audioguru answered your question.If I don't respond it's normally for any of the following reasons.I'm busy You haven't made it clear you're asking a question, respond clarifying it and add more information, if you can. I don't think you've given the question enough thought and feel that you could answer it yourself if you just gave it more thought.The LM338 has a drop out of 3V which means it requires a difference of 3 V between the input and output to regulate properly. When it's configured as a current regulator, the sense resistor between the output and the adjust pin will drop another 1.25V at full load. 3+1.25 = 4.25V. The current regulator is connected in series with the other LM338 which is configured as a voltage regulator. Quote Link to comment Share on other sites More sharing options...
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