USB CHARGING SYSTEM WITH VARIABLE CHARGING VOLTAGE, CHARGER, AND INTELLIGENT TERMINAL

摘要

A charger, comprising a first universal serial bus (USB) interface (101); an alternating current/direct current (AC/DC) module (102) for converting AC into DC and outputting at least two charging voltages; a gating module (103) for selecting and connecting an output end corresponding to the charging voltage; and a first control module (104) for controlling the gating module to select an output end according to the power level state of the positive data end (D+) and negative data end (D-) of the first USB interface.