Device and method of ensuring power delivery in universal serial bus interface
AssigneeSamsung Electronics Co., Ltd.
InventorJe-Kook Kim
Life of this patent
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Abstract
A method of ensuring power delivery in a universal serial bus (USB) interface between a device and a counterpart device, the device including a port controller and a USB receptacle. The method includes the port controller attempting to detect an abnormal state in which a leakage current occurs in the USB receptacle using at least one pin of the USB receptacle; and when the abnormal state is detected, the port controller turning OFF a switch connected between a power pin of the USB receptacle and an internal circuit of the device, and determining to enter an unattached state of being separated from the counterpart device.
Claims20
A device configured to provide a universal serial bus (USB) interface, the device comprising:
- a USB receptacle comprising a plurality of pins;
- a power circuit configured to generate at least one voltage;
- a switch configured to electrically connect a first pin of the plurality of pins and the power circuit in response to a switch control signal that is activated;
- and
- a port controller configured to apply a test signal to at least one pin of the plurality of pins and generate the switch control signal based on a response to the test signal.
A device configured to provide a universal serial bus (USB) interface, the device comprising:
- a USB receptacle comprising a plurality of pins;
- a power circuit configured to generate at least one voltage;
- a switch configured to electrically connect a first pin of the plurality of pins and the power circuit in response to a switch control signal that is activated;
- and
- a port controller configured to detect an impedance between at least two pins of the plurality of pins and generate the switch control signal based on the detected impedance.
A method of ensuring power delivery in a universal serial bus (USB) interface, the method comprising:
- pulling up or pulling down at least one pin of a plurality of pins included in a USB receptacle;
- sensing at least one first voltage of the at least one pin at a first time;
- sensing at least one second voltage of the at least one pin at a second time;
- determining a rate of change of voltage of the at least one pin between the first time and the second time;
- and
- turning on or turning off, based on the at least one first voltage and the rate of change of voltage of the at least one pin, a switch connected between a first pin of the plurality of pins and a power circuit configured to generate at least one voltage for the power delivery.
Dependencies are inferred from the claim text.