original DC-DC XL4015 5A Digital LED Drive Lithum Battery Charger Module CC/CV USB Step Down Buck Converter With Voltmeter Ammeter

With voltage, current, power display, no multimeter can also be easily used, powerful!
With USB interface, with three major features to meet your vast majority of occasions!

Module highlights
1. Onboard voltage, current, power meter, you do not have a multimeter can also easily use this module, easier and more intuitive.
2. Onboard USB interface, you can easily charge your digital products. (Note: USB output voltage and module output voltage is consistent, not fixed 5V output, USB device to charge before you confirm)
3. High power, high efficiency, 5A, low ripple;
4. Three functions:
(1) as a general step-down module with overcurrent protection capability;
(2) as a variety of voltage lithium batteries, batteries, nickel-cadmium nickel-metal hydride batteries (battery pack) charger used for solar panels, wind turbines and other occasions;
(3) as a high power LED constant current drive module used;
5. With constant voltage and constant current two modes, there are indicators that the module is currently in which mode;
6. When used as a lithium battery charger, you can set the float voltage and charge current size, with indicator light
That is being charged or filled;
7. With current limiting protection function, even if the output short circuit will not burn the module.
8. Onboard voltage, ammeter can be self-calibration, there will never be inaccurate!
9. with heat sink, presented copper pillars!
Module parameters
Input voltage: 5-36V
Output voltage: 1.25-32V continuously adjustable
Output current: adjustable, maximum 5A (recommended for use within 4.5A)
Output power: 75W maximum (recommended in the use of 50W, large pressure difference, please reduce the power)
Operating temperature: -40 ~ +85 degrees
Operating frequency: 180KHz
Conversion efficiency: up to 96%
Short circuit protection: Yes
Over-temperature protection: Yes (over-temperature automatically turn off the output)
Input Reverse Protection: None, (if required, enter the string into the high current diode)
Installation: 4 3mm screws
Wiring method: terminal or welding terminal, V-IN for the input, V-OUT for the output
Module size: length 68.2mm wide 38.8mm high 15mm
Weight: 39g
Application scope
1. Used as a normal buck module with overcurrent protection capability
Instructions:
(1) press the right button, adjust the digital meter to [display output voltage] interface, adjust the "constant voltage potentiometer", so that the output voltage to the desired voltage value;
(2) adjust the digital table to the [display output current] interface, directly short the output of the module (to find a thick wire short-circuit output can be), then adjust the "constant current potentiometer" Current value reaches the preset overcurrent protection value; (such as the onboard ammeter shows the current value is 4A, then the module maximum current is limited to 4A, the current to 4A when the red indicator light)
(3) connected to the load, work.
2. Used as a battery charger
Non-constant current function of the module can not be used to charge the battery, due to the power consumption of the battery and the charger is very large pressure, resulting in charging current is too large, resulting in battery damage, so the beginning of the battery to use constant Flow charge, when the charge to a certain extent, when the automatic switching back to constant voltage charging.
Instructions:

(If the lithium battery parameters of 3.7V / 2200mAh, then the float voltage is 4.2V, the maximum charge current of 1C, that is, 2200mA); (if the battery voltage is 7V,
(2) under no-load conditions, the module will be adjusted to the digital display [display output voltage] interface, adjust the "constant voltage potentiometer" so that the output voltage to float voltage;
(3) adjust the digital meter to the [display output current] interface, directly short the module output (to find a thick wire short-circuit output can be), then adjust the "constant current potentiometer" Current value reaches the preset charge current value;
(4) Charging Turn the lamp current factory default 0.1 times the charging current; (battery in the charging process is gradually reduced current, and gradually from constant current charging to constant voltage charging, if the charge current is set to 1A, then when Charge current is less than 0.1A when the blue light off, green light, this time the battery charge is completed)
(5) connected to the battery, charging.
(Steps 1, 2, 3, 4 are: input termination power supply, the output does not load the battery)
3. Used as LED constant current drive module
(1) determine the operating current and maximum operating voltage you need to drive the LED;
(2) under no-load conditions, the digital meter is adjusted to [display output voltage] interface, adjust the "constant voltage potentiometer" so that the output voltage to LED operating voltage;
(3) adjust the digital meter to the [display output current] interface, directly short the module output (to find a thick wire short-circuit output can be), then adjust the "constant current potentiometer" Current value reaches the preset LED operating current;
(4) connected to the LED, test machine.

(Steps 1, 2, 3: input power supply, the output no load LED lights)