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Constant current parallel voltage stabilized power supply circuit diagram composed of LM317

Source: InternetPublisher:张三叔 Keywords: Constant current regulated power supply circuit LM317 Updated: 2021/02/15

As shown in the figure is a constant current parallel regulated power supply. It has the characteristics of high speed, low noise and low internal resistance. Using LM317 as a constant current source, it can provide a constant current of 560mA to the load. The field effect transistor 2SR3D and the light emitting tube provide a low-noise reference voltage. LM741 (op amp) serves as an error amplifier to compare and amplify the reference voltage and sampling voltage. Two 3DD15 are used to adjust the output voltage to achieve stable output voltage.

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