​Constant current/voltage DC-DC 5.5-30V To 0.5-30V Adjustable Automatic Step-Up Down  Power Supply Module For Solar Lithium Battery ChargingIntroduction: 4A step-up and step-down module (constant voltage constant current version).wide voltage input 5.5-30V, wide voltage output 0.5-30V, both boost can also buck, such as you adjust the output voltage of 18V, then the input voltage between 5.5-30V casually change, will be constant output 18V.Used as a general step-up and step-down module with overcurrent protection capability.Used as a battery charger.Used as a high power LED constant current drive module.High power, high efficiency, better performance than XL6009 / LM2577 program.  Iron silico aluminum magnetic ring inductance, high efficiency.Constant current mode without electric whistle.You can set the current size, used to limit the output current, constant current drive, battery charging lamp occasions.Comes with the output anti-backwash function, to the battery charge without additional anti-flooding diode.Product parameters:Input voltage: 5-30V.Output voltage: 0.5-30V.Output current: to long-term stability in the 3A, to strengthen the heat can reach 4A.Output power: natural cooling 35W, strengthen the heat 60W.Conversion efficiency: 88% or so.Short circuit protection: Yes.Operating frequency: 180KHZ.Size: 65 * 32 * 21mm(L* W* H).Note: This module in more than 3A, 35W use, please strengthen the heat!Precautions:The module input IN- is disabled from the output OUT-, otherwise the constant current function is disabled.Make sure that the power time of the power supply is greater than the power required for the output load!Module input No input anti-reverse function, please pay attention to the direction of power supply positive and negative.Input voltage to 8V or more, the module can the maximum power output, when the input voltage is 5V, the output power of about 15W. Module current value of the maximum 4A, the premise is limited by the maximum output power, such as the output 17V, the current should not be greater than 2A.Module with output short circuit protection, short circuit protection module automatically shut down the output, to re-power the module can be restored, if your power supply without output current limit protection, it is recommended in the module input front-end fuse, improve safety factor.The module has input undervoltage protection function, the default is about 4.2V, below this value, it will automatically disconnect the output, to re-power the module can be restored (note that the module port voltage, when the input current is relatively large , Do not ignore the input voltage on the wire).The module contains three indicators, constant voltage constant current status indication (red, constant current mode light), charge indication (blue), full of instructions (green, turn the lamp current is 0.1 times the set current).Package Included:
1 x DC-DC Module
NO Retail Box. Packed Safely in Bubble Bag.