Lm317 Adjustable Voltage Regulator Schematic

The above test circuit supplied 1 amp while 95 of current passed through q1.

Lm317 adjustable voltage regulator schematic.

By 0 5 amps the device is getting hot. This voltage regulator circuit is very simple. For example if the target output voltage is 10v then the r2 value is calculated as following. The lm317 is a popular adjustable positive linear voltage regulator it was designed by bob dobkin in 1976 while he worked at national semiconductor.

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. Typical positive voltage regulator circuit using lm317. A classic voltage regulator circuit using lm317 is shown above.

10 1 25x 1 r2 240 r2 1680ω. The capacitor c1 used for the filtering of dc input voltage and further fed to the vin pin of the lm317 voltage regulator ic. 1 i have a lm317 combined with a mj2955 pnp pass transistor. 4 lead acid battery charger circuits see 4 lm317 lead acid battery charger circuits for 6v 12v and 24v battery.

Adjust voltage in steps 3v 6v 9v 12v. High quality 3a adjustable voltage regulator. It can supply greater than 1 5 a at the output. Resistor network comprising of r1 and r2 connected in association to the.

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.

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

With automatic charging and full charged indicator using tl431. And in fine 1 25v to 20v. Working of lm317 voltage regulator circuit. It requires only two external resistors to set the output voltage.

So this is how we calculate the r2 and output voltage for lm317 voltage regulator circuit. The control of the output voltage remained the same. As rated at an excess of 1 5 amps. 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 voltage control properties of the lm317 was normal. It requires only two external resistors to set the output voltage.