Lm317t High Current Voltage Regulator Circuit

The lm317 is a 3 terminal positive voltage regulator with a 1 25 to 37 volts output voltage range.

Lm317t high current voltage regulator circuit.

The output voltage is set simply using a couple of resistors. Lm317 high current voltage regulator. One can change the value of rb to change the turn on point of q1. If your requirement is for a high current voltage regulator then this article will show you how the addition of a pnp darlington transistor to an lm317t based voltage regulator.

About lm317 supplies 50ma while q1 supplies 950ma. Circuit diagram lm317 voltage regulator ic. In input out output adj adjust. The lm317 ic helps in current limiting thermal overload protection and safe operating area protection.

The lm317 heat sink is warm while q1 heat sink get warm. The lm317t is a very useful adjustable voltage regulator which will take in an input from 3 40 volts dc and output from 1 2 37 volts dc. To achieve this voltage variation only 2 external resistors are needed one of them is a variable resistor. 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.

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. Most of the current though rb flow through q1 base collector circuit. Here you will find how an ordinary lm317 circuit could be converted into a high current 20 amp variable power supply circuit using just a few 2n3055 power transistors in conjunction with a standard lm317 voltage regulator circuit stage. The lm317 regulator terminals are.

Lm317 can also be used to design various other circuits like 0 v to 30 v regulator circuit adjustable regulator circuit with improved ripple rejection precision current limiter circuit tracking pre regulator circuit 1 25 v to 20 v regulator circuit with minimum program current adjustable multiple on card regulators with single control battery charger circuit 50 ma constant current battery charger circuit slow turn on 15 v regulator circuit ac voltage regulator circuit current. It can also provide float operation for high voltage application. The lm317t is rated to output subject to correct heat sinking up to 1 5 amps.