MULTIFUNCTIONAL INTERFACE CONVERSION DEVICE AND MULTIFUNCTIONAL INTERFACE CONVERSION SYSTEM

This disclosure provides a multifunctional interface conversion device and a multifunctional interface conversion system. The multifunctional interface conversion device includes a power adapter module and an interface conversion module. The power adapter module includes an AC-to-DC conversion unit, a first DC-to-DC conversion unit, and a power output terminal. The interface conversion module includes a first power management unit and a first interface. This disclosure combines the power adapter module and the interface conversion module to obtain the multifunctional interface conversion device. The AC-to-DC conversion unit and the first DC-to-DC conversion unit convert an input alternating current into a stable second direct current, and the second direct current is output to the interface conversion module through the power output terminal and the first power management unit, realizing supplying power to an external terminal or charging an external battery without a power adapter and improving relay capability of the external terminal.