Patent ID: 9048666
Filing Date: 2015-06-02
Classification: H02J

Abstract:
1. A USB charging circuit comprising: a mating hub module comprising a USB input port for receiving a data signal and a power signal from an external computer, and a USB main hub control circuit electrically connected to said USB input port for receiving said data signal from said USB input port; a power supply module comprising a power supply device, and a synchronization/charge mode switching circuit electrically connected to said USB input port of said mating hub module and adapted to detect the output of said power signal out of said USB input port and to output a corresponding mode judgment signal; and at least one output control unit, each said output control unit comprising a USB charging control circuit electrically connected to said USB main hub control circuit, said power supply device and said synchronization/charge mode switching circuit and adapted to receive the outputted data signal from said USB main hub control circuit, the outputted power supply from said power supply device and the outputted mode judgment signal from said synchronization/charge mode switching circuit, and a USB output port electrically connected to said USB charging control circuit and adapted to receive the data signal and power supply outputted by said USB charging control circuit after logical judgment.