Constant current source using integrated regulator circuit

Published:2011/4/26 3:12:00 Author:May | Keyword: Constant current source, integrated regulator circuit | From:SeekIC

The value of resistor R in this circuit can determine the value of constant current I3. But I3=I1+I2, among them, quiescent current I2 is about 5mA. The design of circuit must make the voltage U not higher than the maximum value of integrated circuit. The selection of resistor R should make sure that the integrated circuit current not higher than maximum load value, namely, Rmin=UR/IMAXIn the formaula, UR is integrated circuit constanst voltage ,IMAX is integrated maximum current value.Load resistor RL must satisfy the following relation:RL=(UE-UR)/IMAX



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