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US 9,178,384 B2Granted
Power supply system of electronic device and power supply method thereof
AssigneeASUSTeK COMPUTER INC.
InventorsChien-Hung Wu, Nung-Te Huang, Yu-Cheng Shen, Hung-Wei Lin, Hsiao-Wen Chen
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Abstract
A power supply system of an electronic device and a power supply method thereof are provided. Directly detecting the power voltage, when a power anomaly of the power voltage is detected, the electronic device may enter the energy-saving mode immediately for reducing power consumption, and a required DC voltage may be provided directly from the battery.
Claims9
A power supply system of an electronic device, comprising:
- a voltage detecting unit, configured to detect a power voltage for generating a detecting signal;
- an AC/DC converting unit, configured to convert the power voltage to a DC voltage, and the DC voltage is provided to the electronic device;
- a control unit, coupled to the voltage detecting unit, when a power anomaly of the power voltage is detected by the voltage detecting unit, the electronic device is controlled by the control unit to enter an energy-saving mode according to the detecting signal;
- and
- a battery, coupled to the AC/DC converting unit and the electronic device, a DC voltage that the electronic device needs is provided in the the energy-saving mode;
- wherein the voltage detecting unit comprises:
- a first resistor, having a first end and a second end, wherein the first end is coupled to an input end of a power voltage;
- and
- an optical coupler, having an input side and an output side, wherein the input side has a first end and a second end, the first end of the input side is coupled to the second end of the first resistor, and the second end of the input side is coupled to a ground.
6 more elements
A power supply method of an electronic device, comprising:
- converting a power voltage to a DC voltage, and providing the DC voltage to the electronic device;
- detecting the power voltage to determine if a power anomaly occurs;
- controlling the electronic device to enter an energy-saving mode when the power anomaly of the power voltage is detected;
- and
- providing a battery to provide a DC voltage that the electronic device needs in the energy-saving mode;
- wherein the power supply system of the electronic device further comprising a CPU, a GPU, an I/O control unit and a display control unit, and the method for entering the electronic device to the energy-saving mode comprising:
- lowering frequency of the CPU, switching the GPU to an IGPU mode, controlling the I/O control unit to turn off peripheral devices and turning off a display power.
4 more elements
Dependencies are inferred from the claim text.