Lm317 Adjustable Voltage Regulator Circuit

Adjust voltage in steps 3v 6v 9v 12v.

Lm317 adjustable voltage regulator circuit.

Working of lm317 voltage regulator circuit. So this is how we calculate the r2 and output voltage for lm317 voltage regulator circuit. It serves as an interface between a wall outlet and common power electronic equipment. Lm317 is a positive voltage regulator with an adjustable voltage range from 1 25 v to 37 v.

The capacitor c1 used for the filtering of dc input voltage and further fed to the vin pin of the lm317 voltage regulator ic. For example if the target output voltage is 10v then the r2 value is calculated as following. 4 lead acid battery charger circuits see 4 lm317 lead acid battery charger circuits for 6v 12v and 24v battery. The lm317 device is an adjustable three terminal positive voltage regulator capable of supplying more than 1 5 a over an output voltage range of 1 25 v to 37 v.

High quality 3a adjustable voltage regulator. This lm317 circuit is capable to provide variable dc power supply with an output of 1a and can be adjusted up to 30v. 10 1 25x 1 r2 240 r2 1680ω. Input voltage is fed to the pin3 v in of the ic and regulated output voltage is available from pin 2 v out of the ic.

A classic voltage regulator circuit using lm317 is shown above. It can supply greater than 1 5 a at the output. The lm337 is the negative complement to the lm317 which regulates voltages below a reference. With automatic charging and full charged indicator using tl431.

This lm317 calculator can be also be used for some other ics like lm338 or lm350. The adjustable pin is connected with the two external resistor and connected with the vout pin of the ic. It requires only two external resistors to set the output voltage. And in fine 1 25v to 20v.

In this project we are going to design a simple adjustable power supply circuit using an lm317 voltage regulator ic. The lm317 device is an adjustable three terminal positive voltage regulator capable of supplying more than 1 5 a over an output voltage range of 1 25 v to 37 v. The lm317 is a popular adjustable positive linear voltage regulator it was designed by bob dobkin in 1976 while he worked at national semiconductor. Using lm317 and 2n3055 so easy and cheap.

The lm317 circuit is shown in the below figure is a t y pical configuration of the lm317 voltage regulator circuit diagram including the decoupling capacitors. In most of the applications due to irregular loads the output voltage produced has fluctuations in it which can lead to damaging loads. The device features a typical line regulation of 0 01 and typical load regulation of 0 1. The device features a typical line regulation of 0 01 and typical load regulation of 0 1.

It was designed by bob pease who also worked for national semiconductor. It requires only two external resistors to set the output voltage.