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What can the LM317 voltage regulator be used for?
What is lm317 used for? The LM317 serves a wide variety of applications including local, on card regulation. This device can also be used to make a programmable output regulator, or by connecting a fixed resistor between the adjustment and output, the LM317 can be used as a precision current regulator.
Which is the correct value for the LM317 resistor?
LM317 Formula. The LM317 is an adjustable voltage regulator which can output a range of voltages (1.5 to 37V) based on the resistors R1 and R2. Normally the value of R1 is 240Ω, the recommended value by the manufacturer.
What should the R1 value be for the LM317?
LM317 is an adjustable voltage regulator which takes an input voltage of 3 – 40V DC and provides a fixed output voltage of 1.25V to 37V DC. It requires two external resistors to adjust the output voltage. The recommended value for R1 is 240Ω but it can also be some other value between 100Ω to 1000Ω.
How to test the working priciple of LM317?
Testing lm317t. If you look to the ic, the legs towards you, the right one is the input pin. you must see a difference of minimum 1.2V between the two pins, otherwise the IC is faulty. furthermore, the first test is to see if you have input voltage ! What is the working priciple of lm317?
Is the LM317 a constant current power supply?
LM317 constant-current power supply. The LM317 adjustable voltage regulator can be used to make a simple constant-current power supply. The device is over forty years old but is still very popular with beginners due to it’s low cost, availability and thousands of practical applications.
Which is the short circuit protection diode in LM317?
D1 is the output short-circuit protection diode. When the output terminal is short-circuited, CE1 discharges through D1. If there is no D1, CE1 discharges through LM317, which is easy to damage LM317. C1 is the input filter capacitor and C2 is the output filter capacitor.