Features: Input Voltage :4-35V Output voltage: Continuously adjustable(1.25-25V unload adjust) Output current: 3A Max(If more than 15W, please install the heat sink) CC range :0-2A (adjustable) Revolving light current: CC value * (1%-100%), default is 0.1 times Minimum voltage difference: 2V Output power: natural cooling 15W Conversion efficiency: 80% (the higher the output voltage, the higher the efficiency) Operating Temperature: Industrial (-40 ℃ to +85 ℃) (ambient temperature more than 40℃, lower power use, or add heat sink) Full load temperature rise: 45 ℃ Indicator: CC indicator is Red, charging indicator is Red, charging completed the indicator is Blue. Output short circuit protection: Yes, constant current. Connect method: Can solder on the PCB with wire directly Input: IN+ input Positive is, IN- input negative Output: OUT+ output is positive, OUT- output negative Module Size: 50 x 37 x 13mm Some Applications: High-power LED constant current driver. Lithium batteries (including ferroelectric), 4V, 6V, 12V, 14V, 24V battery charging, nickel-cadmium nickel-metal hydride batteries (battery) charge. Solar panels, wind generator voltage regulator circuit board power supply, such as automatic buck regulator circuit. Package Included: 1 x DC-DC Boost buck Voltage Converter LM2577S LM2596S Power Step Up Down Module #DIYMORE #DC-DC #Boost #buck #Voltage #Converter #LM2577S #LM2596S #Power #Step-Up #Module