How do you increase the output current of LM317?
The popular LM317 voltage regulator IC is designed to deliver not more than 1.5 amps, however by adding an outboard current boost transistor to the circuit it becomes possible to upgrade the regulator circuit to handle much higher currents, and upto any desired levels.
What is the maximum output current of LM317?
The LM317 is an adjustable 3−terminal positive voltage regulator capable of supplying in excess of 1.5 A over an output voltage range of 1.2 V to 37 V. This voltage regulator is exceptionally easy to use and requires only two external resistors to set the output voltage.
What is LM317 maximum input voltage?
Description. The LM317 is an adjustable voltage linear regulator that can output 1.25 – 37V at up to 1.5A current with an input voltage range of 3 – 40V.
What is the maximum input voltage for a LM317?
LM317’s have a max. differential spec of 40V so it your input is 42V then the output can be adjusted down to 2V worst case. Of course any load current * voltage drop= watts, causes another problem and that is, how are you going to remove the heat loss?
How to test a LM317?
The best and most effective testing technique to test this IC is out of the PCB. For the pin out of this IC please refer to the exactly IC datasheet what you have to test. In this document, I will use the LM317T regulator and the pin out is usually the same with other LM317 family.
What is voltage regulator and how does it work?
Linear Voltage and Switching Regulator Explained. A linear regulator uses an active pass device called bipolar junction transistor (BJT) or MOSFET) run by a high-gain differential amplifier.
How to make voltage regulator using transistor?
Simplest Voltage Regulator. Probably the simplest type of voltage regulator is the zener shunt stabilizer,which works by using a basic zener diode for the regulation,as demonstrated in Figure