Lm317 Adjustable Voltage And Current Regulator Circuit

It is good quality excellent performance and durable with pcb.

Lm317 adjustable voltage and current regulator circuit.

In most of the applications due to irregular loads the output voltage produced has fluctuations in it which can lead to damaging loads. So this is how we calculate the r2 and output voltage for lm317 voltage regulator circuit. It s an adjustable three terminal voltage regulator ic with a high output current value of 1 5a. I just placed the voltage regulator before the current regulator circuit.

The circuit shown above is of a 5a constant current constant voltage regulator using lm317. It has an internal current limiting temperature detects shutdown and safe area compensation. Lm317 is a positive voltage regulator with an adjustable voltage range from 1 25 v to 37 v. Lm317 has only three terminals and gives variable regulated output.

The control of the output voltage remained the same. It can supply greater than 1 5 a at the output. Simple variable lm317 voltage regulator circuit using few easily available components has been designed and tested in this article as follows. This lm317 calculator can be also be used for some other ics like lm338 or lm350.

The voltage control properties of the lm317 was normal. The only issue is i used a 18 0 18 transformer 500ma rated i intentionally used less current one r3 changed to 2 ohm and r1 to 220 ohm and managed to get only 0 100 ma of current regulation. This current regulator calculator will work for all adjustable integrated circuit regulators with a reference voltage v ref of 1 25. 10 1 25x 1 r2 240 r2 1680ω.

1 i have a lm317 combined with a mj2955 pnp pass transistor. For example if the target output voltage is 10v then the r2 value is calculated as following. If you are looking for a high current adjustable voltage regulator circuit. It can give the output current 20a or 400watts and can adjust the voltage of 4 to 20v or apply to 0 to 30v easily.

By 0 5 amps the device is getting hot. This may be a better choice for you. We know lm317 is a popular adjustable positive voltage regulator with capability of delivering 1 5a output current to the load over an output voltage range of 1 25 v to 37 v. Resistor 240ohm capacitor 1uf and 0 1uf potentiometer 10k battery 9v circuit diagram lm317 voltage regulator ic.

Lm317 voltage regulator ic. For more information about these voltage regulators see the lm317 lm338 lm350 voltage regulator calculator information and circuits page. Lm317 lm338 lm350 current regulator calculator schematic. It has an adjustable 3 terminal positive voltage regulator designed to supply more than 1 5 a of load current with an output voltage adjustable over a 1 2v to 37v range.

Such a circuit is a very inevitable gadget on the work bench of an electronic enthusiast. The above test circuit supplied 1 amp while 95 of current passed through q1.