ARIABLE_CURRENT_SOURCE，100_mA_TO_2_AMP

Published:2009/7/2 3:24:00 Author:May | From:SeekIC

Circuit NotesThe output current is set by the resistor R in the collector of Tr2, which may be varied to offer a range of output currents from 100 mA to 2 A with fine control by means of VR3 which varies the reference voltage to the non-inverting input of the op amp. The feedback path from the output to the inverting input of the op amp maintains a constant voltage across R, equal to（VCC-VIN）/and hence a constant current to the load given by（VCC-VIN）/R.



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