Lm317 Adjustable Current Limiter Circuit

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Lm317 adjustable current limiter circuit.

This circuit addresses that problem. 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. The following circuits show some of the basic uses of the lm317 lm338 lm350 series of voltage regulators when configured as a current regulator or constant current source ccs. If we disconnect the adjustable terminal still lm317 will helpful in overload protection.

A constant current circuit can also be used as a current limiter. This is also a pb free device. Constant current portion of the lm317 based power supply with current limiting. It can also provide float operation for high voltage application.

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. Also see lm317 high power constant current source circuit. In most of the applications due to irregular loads the output voltage produced has fluctuations in it which can lead to damaging loads. Precision current limiter schematic for lm317 lm338 lm350.

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. 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. Lm317 is a positive voltage regulator with an adjustable voltage range from 1 25 v to 37 v.

It s having a typical line and load regulation of 0 1. 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.