40V 2A Power Supply Circuit LM 317

 Description.

This is the circuit diagram of of a 40V    power supply able to deliver 2A current.This circuit is suitable for power amplifiers .Transistor TIP 42 A is used as a pass transistor to increase the current capabilities.Voltage regulator LM 317 is the heart of this circuit .Here the out put voltage is set to 40 V by R5 & R8.If you want any other out put voltage use a 10 K pot instead of R5 and adjust it.

 Parts List.

R1_______________3R9 1 or 2W Resistor
R2______________   22R  1/4W Resistor
R3_______________6K8 1/4W Resistor
R4_____________     220R  1/4W Resistor
R5_______________4K7 1/2W Resistor

C1____________        3300µF  50V Electrolytic Capacitor (or 4700µF 50V)
C2,C5__________       100nF  63V Polyester Capacitors
C3______________   10µF  63V Electrolytic Capacitor
C4_____________      220µF  50V Electrolytic Capacitor

D1_____                         Diode bridge  4A
D2___________          1N4002  Diode
D3______________  LED  Any  color
U1___________          LM317
Q1____________       TIP42A  Transistor
T1_____________     230V Primary, 40V  2A ,Secondary,
Mains transformer.
Note.

If diode bridge is not available make one using four 1N 4007 Diodes.

Circuit Diagram.Click to Enlarge. 

power.JPG

One Response to “40V 2A Power Supply Circuit LM 317”

  1. rajasekar says:

    studentproject

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