Power adapter and electronic device
AssigneeHon Hai Precision Industry Co., Ltd.
InventorJIA-CIAO JHONG
Life of this patent
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Abstract
An electronic device includes a battery, a detecting unit, a comparing unit, a control unit and a charging circuit. The detecting unit is electronically connected to a universal serial bus (USB) interface to detect and determine whether or not the connecting device is a power adapter. The comparing unit outputs a level signal depending upon the comparing unit comparing a input signal received by the USB interface with a voltage threshold. The control unit controls the battery either to be charged by the connecting device through the charging circuit or the battery to supply power to the connecting device through the USB interface according to the level signal.
Claims13
An electronic device comprising:
- a first universal serial bus (USB) interface electrically connected to a connecting device, configured to receive an input signal from the connecting device, wherein the connecting device is a power adapter or a peripheral device including a general USB interface;
- a battery;
- a charging circuit electrically connected to the battery and the first USB interface;
- a detecting unit electrically connected to the first USB interface, configured to detect and determine whether the connecting device is the power adapter;
- a comparing unit electrically connected to the first USB interface, configured to output a level signal depending upon comparing the input signal received by the first USB interface with a voltage threshold;
- and
- a control unit electrically connected to the detecting unit, the comparing unit, and the charging circuit, and configured to control the battery to be charged by the connecting device through the charging circuit or to supply power to the connecting device through the first USB interface, depending on the signal level output by the comparing unit.
A power adapter charging an electronic device according to an external power signal, the power adapter comprising:
- an universal serial bus (USB) interface connected to the electronic device, to receive level signals from the electronic device;
- a control unit electronically connected to the USB interface, to output a control signal according to the level signals received by the USB interface;
- and
- a charging circuit electronically connected to the control unit and receiving the external power signal, to determine whether or not to output the external power signal to the electronic device according to the control signal outputted by the control unit.
The power adapter of claim 12, wherein the control unit comprises:
- a first port and a second port, the first port and the second port of the control unit electronically connected to the USB interface, to receive the level signals from the electronic device;
- wherein in response to the first port and the second port of the control unit being logic 1 signals, the control unit controls that the charging circuit outputs the external power signal to the electronic device.
Dependencies are inferred from the claim text.