Rabin & Berdo, P.C.
USB power supply method and device, and end device and system using the same
A Universal Serial Bus (USB) power supply method is provided. The method is applied to a USB client device to charge a battery of the USB client device. The USB client device is connected to a USB host device via a USB connection including a D+ signal wire and a D− signal wire. The USB power method includes: determining whether the USB host device is a dedicated charging port (DCP) in response to a connection event, providing a verification signal to the USB host device if the USB host device is a DCP, determining whether a verification response signal from the USB host device is received, and driving the USB host device to provide an auxiliary charging current via the D+ and D− signal lines for charging the battery when the verification response signal is received.
Quanta Computer Inc.
G
G06F
inventional
Hung-Yi
Chen