5A Adjustable Regulated Power Supply

  • Rajkumar Sharma
  • 27042
    Views
  • moderate
  • Tested

5A_Adjustable_Regulated_Power_Supply_G006

This project provides a variable output voltage ranging from 1.2 to 32 V @ 5 A. The project based on LM338K IC. LM338K is an adjustable 3 terminal positive voltage regulator capable of supplying a maximum of 5A over a 1.2V to 32V output range. The circuit is simple and consists of a few components.

Features

  • Input Supply : 24 VAC or 30 VDC, 5 Amp
  • Output : variable output from 1.2 to 32 V @ 5 A regulated low ripple DC voltage
  • Heatsink for regulator IC
  • Onboard bridge rectifier to convert AC to DC
  • LED indication at input of IC
  • Thermal overload/short circuit protection (provided by IC feature)
  • Screw terminal connector for easy input and output connection
  • Berg connector for connecting potentiometer (POT) to the PCB
  • Filter capacitors for low ripple DC output
  • Four mounting holes of 3.2 mm each
  • PCB dimensions 91 mm x 66 mm

Schematic

5A_Adjustable_Regulated_Power_Supply_SCH

Parts List

5A_Adjustable_Regulated_Power_Supply_BOM

LM338K Datasheet

lm338

PCB

Comments

  • How about changing the Current like 2 Amp

    4 years ago
    • admin

      You may use a smaller transformer of 2A and have that output as maximum.

      4 years ago
  • JC Droog

    how about current control

    4 years ago
    • admin

      This power supply doesn’t support current control. We are sorry.

      4 years ago
  • mohamed

    in this circiut it needs feedback to make the voltage constant and doesent decrease when adding load at the output how to make this circiut regulated ?????

    3 years ago
    • admin

      Feedback is implemented with R1 and R2, so this is a regulated power supply.

      3 years ago
  • nils

    Hello. I see in list:
    Input Supply : 24 VAC or 30 VDC, 5 Amp
    Does this means the input can be 30DC without your diode bridge or
    24AC with the bridge in circuit
    Thank you

    2 years ago
    • Both of that you describe will work fine.

      2 years ago

Leave a Reply

RELATED PROJECTS

X
PS5 & XBOX Series X Giveaway

By continuing to use the site, you agree to the use of cookies. more info

The cookie settings on this website are set to "allow cookies" to give you the best browsing experience possible. If you continue to use this website without changing your cookie settings or you click "Accept" below then you are consenting to this.

Close