Product parameters:

Product name: lm317 adjustable regulated power supply module
Product size: 53.0mm * 22.0mm * 14.80mm

Color: Blue Product weight: 16.53g (packaging)

Package: Single module static bag packaging Material: FR4 + electronic device

Product performance:

1. Output current: 1.5A (minimum value), 2.2A (typical value)

2. Input-output voltage difference (VI-VO): 40Vdc (maximum)

3. Adjustable output voltage range: 1.2 ～ 37V

4. Working temperature: -55 ° C to + 150 ° C

5. Current output: 1.5A

6. Voltage input: 4.2 ~ 40 V

7. Working temperature: 0 ° C ~ 125 ° C

8. Characteristic frequency: 100 (MHz)

Use tutorial:

Input method: VIN input positive stage, GND input negative pole

Output mode: VOUT output positive stage, GND output negative pole

Maximum output current: Maximum output current = 3 / (input voltage-output voltage)

Input voltage: 4.5V-40V (the highest limit measured by this store can reach 40V),

Adjustment method: Connect the input power correctly (between 4.5V-40V), then use a multimeter to monitor the output voltage and adjust the potentiometer (generally clockwise to step up, and counterclockwise to step down)

Tips:

When adjusting the voltage, pay attention to adjust the required voltage when no load is applied

Disclaimer: The output power of this module is affected by various factors such as the front-end power supply and the rear-end load in addition to the load capacity of the module itself; the following data are the results measured by professional equipment and do not consider other factors.

The power module is a kind of electronic components. Please clear the information of those without electronic professional knowledge before considering buying.

Application examples:

1) .Adjustable three-terminal voltage regulator module, which can replace all three break voltage regulator modules such as 7805, 7806, 7809, 7812, 7824, etc.

2) .Vehicle stabilized power supply, just connect the module input terminal to the car cigarette lighter to supply power, then you can adjust the potentiometer, and the output voltage can be adjusted to your mobile phone, MP3, MP4, 1.25V-30V, Powering many devices such as PSP charging is very simple and convenient.

3). Power your electronic equipment. When your equipment needs 1.25-60V power supply, but you only have 12V or 24V battery for power supply, you can use our module to directly step down 1.25-30V to solve your problems. .

4). System pre-stage power supply. When you input a power supply voltage lower than the voltage you need (1.25V-30V) when doing a certain project, this module will be your choice.

Precautions:

1. Buyers need to know that because it is linear, the efficiency will not be very high. In order to improve efficiency, it is best to have a voltage difference between input and output of 3V. But the maximum voltage difference between input and output should not exceed 30V, that is: input －Output ≤30V, otherwise it is easy to burn the module.

2. Because it is a linear step-down DC-DC circuit, the input voltage needs to have a voltage difference higher than the output voltage by more than 3V to ensure the stability of the output voltage.

common problem:

1. Can I adjust the voltage by myself?
Answer: Yes, through the blue adjustable potentiometer, no-load debugging, use a multimeter to measure the range you want, and it is OK.

2. Is this power module short circuit protected? Do I accidentally burn the input when using it?
Answer: There is no short-circuit protection. If you need short-circuit protection, please connect a resettable fuse in series at the input.