Lm317 Adjustable Voltage And Current Regulator Circuit

The circuit shown above is of a 5a constant current constant voltage regulator using lm317.

Lm317 adjustable voltage and current regulator circuit.

Lm317 lm338 lm350 current regulator calculator schematic. This current regulator calculator will work for all adjustable integrated circuit regulators with a reference voltage v ref of 1 25. The above test circuit supplied 1 amp while 95 of current passed through q1. Lm317 is a positive voltage regulator with an adjustable voltage range from 1 25 v to 37 v.

The voltage control properties of the lm317 was normal. The control of the output voltage remained the same. This lm317 calculator can be also be used for some other ics like lm338 or lm350. I just placed the voltage regulator before the current regulator circuit.

Simple variable lm317 voltage regulator circuit using few easily available components has been designed and tested in this article as follows. As rated at an excess of 1 5 amps. In most of the applications due to irregular loads the output voltage produced has fluctuations in it which can lead to damaging loads. By 0 5 amps the device is getting hot.

Lm317 has only three terminals and gives variable regulated output. It has an internal current limiting temperature detects shutdown and safe area compensation. Such a circuit is a very inevitable gadget on the work bench of an electronic enthusiast. It s an adjustable three terminal voltage regulator ic with a high output current value of 1 5a.

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. 1 i have a lm317 combined with a mj2955 pnp pass transistor. It is good quality excellent performance and durable with pcb. 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.

If you are looking for a high current adjustable voltage regulator circuit. This may be a better choice for you. Lm317 voltage regulator ic. The lm317 ic helps in current limiting thermal overload protection and safe operating area.

For example if the target output voltage is 10v then the r2 value is calculated as following. Resistor 240ohm capacitor 1uf and 0 1uf potentiometer 10k battery 9v circuit diagram lm317 voltage regulator ic. For more information about these voltage regulators see the lm317 lm338 lm350 voltage regulator calculator information and circuits page. 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.

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. In addition to lm317 lm310 a single operational amplifier is also used in the circuit.