Adjustable Step-down Power Supply Buck Voltage Converter Regulator module Large current 5A,Constant current and voltage

Note: When this module is used over 3A, 35W, please strengthen the heat dissipation! ! !
Please allow 1-3CM differs due to manual measurement. 
Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding.
Module highlights:
1. High power, high efficiency, 5A, low ripple;
2. Three in one:
(1) Used as a common step-down module with overcurrent protection capability;
(2) It is used as a charger for lithiium batteries, batteries, nickel-cadmium nickel-metal hydride batteries (battery packs) of various voltage values, and is used in solar panels, wind turbines, etc.;
(3) Used as a high-power LED constant current drive module;
3. It has two modes of constant voltage and constant current, and the indicator light indicates which mode the module is currently in;
4. When used as a lithiium battery charger, you can set the float charging voltage and charging current size, there is an indicator to indicate whether it is charging or has been fully charged;
5. With current limiting protection function, the module will not be burned even if the output is short circuited.
1. Module parameters
Input voltage: 4-38V
Output voltage: 1.25-36V continuously adjustable
Output current: adjustable, maximum 5A
Output power: maximum 75W
Working temperature: -40~+85 degrees
Working frequency: 180KHz
Conversion efficiency: up to 96%
Short circuit protection: yes (limit current 8A)
Over-temperature protection: Yes (automatically turn off the output after over-temperature)
Input reverse connection protection: none, (if necessary, please connect a high current diode to the input)
Installation method: 4 pieces of 3mm screw
Wiring method: terminal or welding terminal, V-IN is input, V-OUT is output
Module size: length 51.2mm width 26.2mm height 15mm
Second, the scope of application
1. Used as a common buck module with overcurrent protection capability
Instructions:
(1) Adjust the constant voltage potentiometer to make the output voltage reach the voltage value you want
(2) Use the multimeter 10A current range to measure the output short-circuit current (just connect the two test leads to the output terminal), and adjust the constant current potentiometer to make the output current reach the predetermined overcurrent protection value. (For example, the current value displayed by the multimeter is 4A, then the maximum current can only reach 4A when you use the module, and the red constant voltage and constant current indicator lights when the current reaches 4A, otherwise the indicator is off)
Note: When used in this state, because the output terminal has a 0.05 ohm current sampling resistor, there will be a voltage drop of 0~0.3V after connecting the load, which is normal! This voltage drop is not pulled down by your load, but dropped to the sampling resistor.
2. Use as a battery charger
The module without constant current function can not be used to charge the battery. Due to the large voltage difference between the exhausted battery and the charger, the charging current is too large and the battery is damaged. Current charging, when the charging reaches a certain level, it will automatically switch back to constant voltage charging.
Instructions:
(1) Determine the float charge voltage and charge current of the rechargeable battery you need; (If the lithiium battery parameter is 3.7V/2200mAh, then the float charge voltage is 4.2V, and the maximum charge current is 1C, which is 2200mA)
(2) Under no-load conditions, the multimeter measures the output voltage and adjusts the constant voltage potentiometer to make the output voltage reach the float charge voltage; (If the 3.7V lithiium battery is charged, the output voltage can be adjusted to 4.2V)
(3) Use the multimeter 10A current range to measure the output short-circuit current (just connect the two test leads to the output terminal), and adjust the constant current potentiometer to make the output current reach the predetermined charging current value;
(4) The charging lamp current defaults to 0.1 times the charging current; (The current of the battery gradually decreases during the charging process, and gradually changes from constant current charging to constant voltage charging. If the charging current is set to 1A, then when When the charging current is less than 0.1A, the blue light is off, the green light is on, and the battery is fully charged at this time)
(5) Connect the battery and charge.
(Steps 1, 2, 3, and 4 are: the input terminal is connected to the power supply, and the output terminal is no-load and not connected to the battery)
3. Used as a high-power LED constant current drive module
(1) Determine the working current and maximum working voltage of the LED you need to drive;
(2) Under no-load conditions, the multimeter measures the output voltage and adjusts the constant voltage potentiometer to make the output voltage reach the maximum working voltage of the LED;
(3) Use the multimeter 10A current range to measure the output short-circuit current, and adjust the constant current potentiometer to make the output current reach the predetermined LED working current;
(4) Connect the LED and test the machine.
(Steps 1, 2, and 3 are: input is connected to power supply, output is not connected to LED light.)