Features:5A DC-DC Constant Current for LED Driver Li-ion Power Supply ModuLe Step-down Type Power Supply Use as a regular module with over-current protectionUsed as a Charger for Lithium Battery,Nickel-cadmium Nickel-Cadmium Metal Hydride Batteries (Rechargeable Battery)Use as LED High Power Constant Current Driver ModuleAbout Modes:Constant Voltage and Constant Current,Indicator DisplayWhen used as a lithium battery charger, you can set the float voltage and charging current. High Power, High Efficiency, Low Ripple, CUrrent Limit ProtectionSpecifications:Input Voltage: 4-38V Output Voltage: 1.25-36V(Continuously Adjustable)Output Current:Max. 5A(Adjustable)Output Power:Max. 75W Working Temperature: -40 Celsius Degree - +85 Celsius Working Frequency: 180KHzConversion Efficiency: Up to 96% Short Circuit Protection: Yes (Limited Current 8A)Over Temperature Protection: Yes (Auto Shutdown Output If Over Temperature)Reverse Input Protection: NoInstallation Method: 4*3mm Screws Wiring: Solid or Soldering Terminal, V-IN is Input, V-OUT is Output ModuleDimension: Approx. 51.2mm*26.2mm*15mm Instructions:1. Use as a regular module with over Overcurrent Protection(1) adjust the constant voltage so that the output voltage reaches the desired voltage level. (2) measure the output short-circuit current with a 10A multi-meter current meter (directly connect the two test leads to the output terminal), and adjust the DC potentiometer to make the output current reach a certain value of overcurrent protection. (For example, the current value displayed by the multimeter is 4A, and then when using the module, the maximum current can only reach 4A. When the current reaches 4A, the red constant voltage constant current indicator is on, otherwise the indicator is off). Note:If used in this way,When the load is connected, there will be a voltage drop of 0 – 0.3V, because the output has a current sampling resistor of 0.05 Omega;. This is normal! The voltage drop is not pulled by the load, but falls to the sampling resistor.2. Use as a battery chargerThe module without the constant current function cannot be used to charge the battery. Because the voltage difference between the battery and the charger that consumes electricity is very large, the charging current is too large and the battery is damaged. Therefore, the battery must be used at the beginning. Charging flux, automatically switches back to constant charging voltage when charging to a certain extent. Usage:(1)Make sure you need float charging voltage and battery charging current; (if the lithium battery parameter is 3.7V/2200mAh, the float voltage is 4.2V, the maximum charging current is 1C, i.e. 2200mA)(2)Under no-load conditions, the multimeter measures the output voltage and adjusts the constant voltage so that the output voltage reaches the float voltage; (if 3.7V lithium battery is charged, adjust the output voltage to 4.2V)(3)Measure the output short-circuit current with a multimeter 10A current range (directly connect two test leads to the output terminal), and adjust the DC potentiometer to make the output current reach the preset value of charging current; (4)Charging screw-in lamp current factory default is 0.1 times charging current; (battery in the process of charging, the current is gradually reduced, and gradually from constant charging current to constant charging voltage, if the charging current is set to 1A, then when the charging current is less than 0.1A, the blue light is off and the green light is on. At this point, the battery is fully charged.)(5)Plug in the battery and charge it. (Steps 1, 2, 3 and 4: the input is connected to the power supply, the output is not connected to the battery)3. Use like a high-power LED DC drive module1)Make sure you need to control the LED working current and maximum working voltage; 2)Under no-load conditions, the multimeter measures the output voltage and adjusts the constant voltage of the leveler so that the output voltage reaches the maximum LED operating voltage; 3)Measure the output short-circuit current with the 10A current meter of the multimeter, and adjust the DC potentiometer at the same time, so that the output current reaches the predetermined LED working current; 4)Connect the LED, test machine. (Steps 1, 2 and 3 are: input power, LED light with no output load.)Note on: When this module is used above 3A and 35W, please improve the heat dissipation! Package Contents: 1 * ModuleNote: The actual colors of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.