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High Current Variable Power Supply LM317

Thursday, January 24th, 2019 - Power Supply

LM317 variable voltage regulator can be created with the ability of a large current drain. Techniques to increase the supply current capability of the LM317 regulator is installed with the configuration of the transistor circuit as in the picture High Current Variable Power Supply LM317 below. Variable power supply circuit with a large current can be regulated supply voltage from 1.2 Volts to 37 Volts and a current maximum of 5 Amperes.

The series of High Current Variable Power Supply LM317

Part List Of High Current Variable Power Supply LM317

R1 3.9 Ohm 2W
R2 22 Ohm 0.25W
5 kOhm Potentiometer R3
R4 220 Ohm 0.25W
R2 22Ohm 0.25W
C1 3300 uF/50V
C2, C5 100nF
C3 10uF/50V
C4 220uF/50V
D1 5A Bridge
D2 1N4002
D3 LED
IC1 LM317
Q1 TIP2955

The function of amplifier power supply current in the circuit above were determined by the type of PNP transistors are used. Then as the control voltage using a variable positive voltage regulator LM317. To set the output voltage level by adjusting the resistance value R3.