Lm317 High Current Voltage Regulator Circuit

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

Lm317 high current voltage regulator circuit.

1 i have a lm317 combined with a mj2955 pnp pass transistor. I personally love this ic yes it s not a transistor a lot not because it server it purpose well but because it s cheap easy and never disappoints you while making a regulated dc power supply. This configuration also provides the usual regulated stabilized variable voltage output using lm317 however here the current output is immensely increased and thus becomes suitable with circuits involve huge currents at desired settable voltages. It can supply greater than 1 5 a at the output.

Such a circuit is a very inevitable gadget on the work bench of an electronic enthusiast. The high current lm317 power supply circuit shown down the page makes use of an supplemental winding or possibly a independent transformer to deliver power to the lm317 regulator in order that the outboard pass transistors are able to work nearer to saturation and strengthen efficiency. The control of the output voltage remained the same. In most of the applications due to irregular loads the output voltage produced has fluctuations in it which can lead to damaging loads.

Looking at the proposed high current lm317 regulator circuit design we can see how the basic lm317 variable power supply design which is normally rated to deliver just 1 amp current is cleverly upgraded to a high current version using a few 2n 3055 transistors. It can also provide float operation for high voltage application. In addition to lm317 lm310 a single operational amplifier is also used in the circuit. By 0 5 amps the device is getting hot.

The circuit shown above is of a 5a constant current constant voltage regulator using lm317. From all principles above we have circuits applications as shown in figure 4 if you want to add the ic lm338 enabling them to be higher current. High current adjustable regulator. The output voltage is set simply using a couple of resistors.

High power dc regulator 4 20 volts 20 amps by lm338. The voltage control properties of the lm317 was normal. It s an adjustable three terminal voltage regulator ic with a high output current value of 1 5a. As rated at an excess of 1 5 amps.

The lm317 ic helps in current limiting thermal overload protection and safe operating area protection. Lets make a high current power supply with lm317 voltage regulator which can supply upto 5 amp lm317 is one of the oldest most used and wonderful linear voltage regulators. For a transformer that can supply at least 30 amperes and voltage secondary coil should not be less than 18 volts.