XL4015 5A Constant Voltage Current Module Step Down Buck Converter Board 5-32V to 0.8-30V Power Supply For Charging This linear module has constant voltage and constant current function (CC CV). and it has a good performance. When you use it as a charger. this module use good chip as core and it is stable. also its ripple is low to 50mV. Specification: Size: 51 * 26.3 * 14 (L * W * H) (mm) Operating Temperature: -40 ° to +85 ° Voltage Regulation: ± 2.5% Load Regulation: ± 0.5% Output ripple: 50mV (max) 20M bandwidth Switching frequency: 300KHz Conversion efficiency: 95% (the highest) Output current: adjustable maximum 5A Output voltage: 0.8V-30V Input voltage: 5V-32V Rectification: non-synchronous rectification Module Properties: non-isolated constant current and voltage module. Advantage: CC CV Low ripple When the module charges a battery, it first use constant current to protect the battery. check the curse above. Package Included: 1 x XL4015 5A Constant Voltage Current Module