Patent ID: 9257893
Filing Date: 2016-02-09
CPC Classification: G06F,H02J,H02M

Claim Text:
1. A universal serial bus (USB) power supply including: a first unit, and a second unit releasably connectable with said first unit, wherein said first unit is releasably connectable to a direct current (DC) power source for receiving a DC power there-from, said first unit including a first USB connection part electrically connectable with said DC power source, wherein said second unit includes a second USB connection part releasably connectable with said first USB connection part to establish electrical connection and data communication there-between and a connector electrically connected with said second USB connection part, wherein said power supply is operable in a detached mode in which said first unit is out of connection with said second unit and in an attached mode in which said first unit is releasably connected with said second unit, wherein, when in said attached mode, said power supply is adapted to automatically change the voltage of a DC power output from said connector, wherein said power supply includes a current sensor which, when said power supply is in said attached mode, is adapted to detect electricity current output from said first USB connection part, wherein said first unit includes a converter adapted to change the voltage of a DC power received from said DC power source for output, and wherein, when said power supply is in said attached mode, and during detection by said current sensor of said electricity current output from said first USB connection part, said converter is adapted to first output a DC power at a first pre-determined voltage and to increase the voltage of DC power outputted thereby from said first pre-determined voltage until said current sensor senses a step change of the electric current output from said first USB connection part, whereupon said converter is adapted to continue to output a DC power at the voltage at which said step change of the electric current output from said first USB connection part is detected.