Lm317 Adjustable Voltage Regulator Circuit

And in fine 1 25v to 20v.

Lm317 adjustable voltage regulator circuit.

Lm317 is a positive voltage regulator with an adjustable voltage range from 1 25 v to 37 v. A classic voltage regulator circuit using lm317 is shown above. This lm317 calculator can be also be used for some other ics like lm338 or lm350. With automatic charging and full charged indicator using tl431.

So this is how we calculate the r2 and output voltage for lm317 voltage regulator circuit. 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 device features a typical line regulation of 0 01 and typical load regulation of 0 1. Resistor network comprising of r1 and r2 connected in association to the pin1 adj is used to set the output voltage.

A dc adjustable power supply is an integral part of any power supply unit used in electronic equipment. The device features a typical line regulation of 0 01 and typical load regulation of 0 1. 4 lead acid battery charger circuits see 4 lm317 lead acid battery charger circuits for 6v 12v and 24v battery. Using lm317 and 2n3055 so easy and cheap.

Working of lm317 voltage regulator circuit. It requires only two external resistors to set the output voltage. It serves as an interface between a wall outlet and common power electronic equipment. 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. High quality 3a adjustable voltage regulator. In this project we are going to design a simple adjustable power supply circuit using an lm317 voltage regulator ic. The capacitor c1 used for the filtering of dc input voltage and further fed to the vin pin of the lm317 voltage regulator ic.

The adjustable pin is connected with the two external resistor and connected with the vout pin of the ic. This voltage regulator circuit is very simple. The lm337 is the negative complement to the lm317 which regulates voltages below a reference. It requires only two external resistors to set the output voltage.

It was designed by bob pease who also worked for national semiconductor. It can supply greater than 1 5 a at the output. This lm317 circuit is capable to provide variable dc power supply with an output of 1a and can be adjusted up to 30v. 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.

For example if the target output voltage is 10v then the r2 value is calculated as following. Adjust voltage in steps 3v 6v 9v 12v.