Lm317 Adjustable Current Limiter Circuit

To be precise the upper lm317 forms the current regulator stage while the lower acts like a voltage controller stage.

Lm317 adjustable current limiter circuit.

Also see lm317 high power constant current source circuit. A constant current source ccs in electronics is a device circuit that produces a constant value of current regardless of source voltage or load resistance. 1 amp current regulator schematic for lm317 lm338 lm350. It can also provide float operation for high voltage application.

Lm317 3 terminal adjustable regulator 1 1 features 1 output voltage range adjustable from 1 25 v to 37 v output current greater than 1 5 a internal short circuit current limiting thermal overload protection output safe area compensation 2 applications atca solutions dlp. Precision current limiter schematic for lm317 lm338 lm350. A constant current circuit can also be used as a current limiter. The lm317 ic helps in current limiting thermal overload protection and safe operating area protection.

The input supply source is connected across the vin and ground of the upper current regulator circuit the output from this stage goes to the input of the lower lm317 variable voltage regulator stage. If we disconnect the adjustable terminal still lm317 will helpful in overload protection. In most of the applications due to irregular loads the output voltage produced has fluctuations in it which can lead to damaging loads. Lm317 is a positive voltage regulator with an adjustable voltage range from 1 25 v to 37 v.

This circuit addresses that problem. This is also a pb free device. As you determined in your op there s a problem using a variable resistor in a current source mode because all the current goes through the variable resistor. It can supply greater than 1 5 a at the output.

It s having a typical line and load regulation of 0 1. 3d biometrics hyperspectral imaging.