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5A Lithium Charger CV CC Buck Step Down Power Supply Module LED DriverSpecification:Size: CC CV Voltage RegulatorFrequency: 180KHz Input voltage: 4-38V Output power: 75W(Max) Transfer efficiency: 96%(Max) Output current: adjustabel;5A(Max) Input reverse connection protection: NO Working temperature: -40 to +85 Celsius Output voltage: 1.25-36V constantly adjustable Short-circuit protection: YES(limited current of 8A) Over-temperature protection: YES(item will stop output atomatically)Note:Please strengthen cooling when buck converter module is used in more than 3A,35WProduct functions:1.Work as high-power LED constant current driver module 2.Work as buck converter module with over-current protection 3.Charger of batteries(eg. nickel-cadimium or nickel-metal hydride battery, lithium batteries);can be used in solar panel/wind turbines/etc How to set current limits:1. Adjust constant-voltage potentiometer to make output voltage reach the voltage value which you want. 2. Use 10A multimeter to measure short-circuit output current (directly connect two meters to output interface), at the same time, adjust constant-voltage potentiometer to make output current reach preset over-current protection value. (If the current value multimeter displays is 4A, the maxmum current of the module only can be up to 4A; when the current reach 4A, constant-voltage constant-current red indicator light is on, or the light is off)LED indicator light:1. Red light is on in constant current status and off in constant voltage status. 2. Blue light is on when charging and off when full-charging 3. Green light is on when full-charged.