XL4015 DC-DC Step-down Power Supply Module Max 5A

Application Scope
1. Used as a general-purpose step-down module with overcurrent protection.
Usage Method:
(1) Adjust the constant voltage potentiometer to achieve the desired output voltage value.
(2) Measure the output short-circuit current using a multimeter in 10A current range (simply connect the two probes to the output terminal). Simultaneously adjust the constant current potentiometer to achieve the predetermined overcurrent protection value. (For example, if the multimeter displays a current value of 4A, the maximum current when using the module is 4A. The red constant voltage/constant current indicator light will illuminate when the current reaches 4A; otherwise, the indicator light will be off.)
Note: When using in this state, due to the 0.05 ohm current sampling resistor at the output terminal, there will be a voltage drop of 0~0.3V after connecting the load. This is normal! This voltage drop is not caused by the load, but rather by the sampling resistor. 2. Use as a battery charger

Modules without constant current functionality cannot be used to charge batteries. Because the voltage difference between a fully discharged battery and the charger is very large, this results in excessive charging current, which can damage the battery. Therefore, constant current charging should be used initially, and the module should automatically switch back to constant voltage charging once a certain level of charging has been achieved.

Instructions for Use
(1) Determine the float charge voltage and charging current of the battery you need to charge; (For example, if the lithium battery parameters are 3.7V/2200mAh, then the float charge voltage is 4.2V, and the maximum charging current is 1C, i.e., 2200mA)
(2) Under no-load conditions, use a multimeter to measure the output voltage and adjust the constant voltage potentiometer to make the output voltage reach the float charge voltage; (For example, to charge a 3.7V lithium battery, adjust the output voltage to 4.2V)
(3) Use a multimeter in the 10A current range to measure the output short-circuit current (simply connect the two probes to the output terminal), and at the same time adjust the constant current potentiometer to make the output current reach the predetermined charging current value;
(4) The default factory setting for the charging indicator light current is 0.1 times the charging current; (During the charging process, the current gradually decreases, gradually changing from constant current charging to constant voltage charging. If the charging current is set to 1A, then when the charging current is less than 0.1A, the blue light goes out and the green light turns on, indicating that the battery is fully charged)
(5) Connect the battery and start charging.
(Steps 1, 2, 3, and 4: Connect the input to the power supply, and leave the output unloaded without a battery.)

3. Use as a high-power LED constant current driver module
(1) Determine the operating current and maximum operating voltage required to drive the LED;
(2) Under no-load conditions, measure the output voltage with a multimeter and adjust the constant voltage potentiometer to make the output voltage reach the maximum operating voltage of the LED;
(3) Measure the output short-circuit current with a multimeter in the 10A current range, and simultaneously adjust the constant current potentiometer to make the output current reach the predetermined LED operating current;
(4) Connect the LED and test the device.
(Steps 1, 2, and 3: Connect the input to the power supply, and leave the output unloaded without a battery.)

Note: When using this module at a power level exceeding 3A and 35W, please ensure adequate cooling!

Module Highlights
1. High power, high efficiency, 5A, low ripple;
2. Three-in-one:
(1) Used as a general-purpose step-down module with overcurrent protection;
(2) Used as a charger for various voltage values of lithium batteries, electric batteries, and nickel-cadmium/nickel-metal hydride batteries (battery packs), for use in solar panels, wind turbines, etc.;
(3) Used as a high-power LED constant current drive module;
3. Features both constant voltage and constant current modes, with indicator lights to show the current mode;
4. When used as a lithium battery charger, the float charge voltage and charging current can be set, with indicator lights showing whether it is charging or fully charged;
5. Features current limiting protection, preventing module damage even if the output is short-circuited. 

Module Parameters
Input Voltage: 4-38V
Output Voltage: 1.25-36V continuously adjustable
Output Current: Adjustable, maximum 5A
Output Power: Maximum 75W
Operating Temperature: -40~+85 degrees Celsius
Operating Frequency: 180KHz
Conversion Efficiency: Up to 96 lux
Short Circuit Protection: Yes (limits current to 8A)
Over-Temperature Protection: Yes (automatically shuts off output after over-temperature)
Input Reverse Connection Protection: None (if required, please connect a high-current diode in series with the input)
Mounting Method: 4 x 3mm screws
Wiring Method: Terminal blocks or soldered terminals, V-IN for input, V-OUT for output
Module Dimensions: Length 61.7mm, Width 26.2mm, Height 15mm