12V_AT_20A

Published:2009/7/6 2:23:00 Author:May | From:SeekIC

Regulator conducts and regulates until current demand is such that IR drop across RS is sufficient to overcome base-emitter junction potential of switch transistor QS, which is two 2N174 germanium transistors in parallel. Use 2 ohms for RS. QS is then turned on, with current/voltage regulation to its base controlled by regulator. Input voltage of 7812 regulatorshould be 2 V more than desired output voltage. Article gives three different rectifier circuits suitable for use with regulator.-A. M. Clarke,Regulated 200 Watt-12 Volt D.C. Power Supply, CQ, Oct. 1975, p 28-30 and 78-79.



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