Systems and methods for charging a chargeable usb device

Details Systems and methods for charging a chargeable usb device Systems and methods for charging a chargeable usb device

H - Electricity

02

J

H02J 7/00 (2006.01) G06F 1/26 (2006.01)

Patent

CA 2536301

Systems and methods are provided for charging a USB device. A USB connector may be used to couple the system to a USB port on the USB device, the USB connector including a bus voltage (Vbus) connector, a positive data (D+) connector, and a negative data (D-) connector. Charger circuitry may be used to receive a source voltage and convert the source voltage into the bus voltage (Vbus), wherein the bus voltage (Vbus) is used to charge the USB device. Presence detect circuitry may be used to compare a first voltage present on the D+ connector with a second voltage present on the D- connector in order to detect when the USB connector is coupled to the USB port of the USB device.

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