Power saving method and power saving circuit thereof
AssigneeWistron Corporation
InventorsChien-Liang Chen, Chin-Min Liu
Life of this patent
Estimating the term…
Abstract
A power saving circuit for an electronic device is disclosed. The power saving circuit includes a direct-current (DC) power supply, a sensing unit, and a control unit. The DC power supply is used for providing a DC current. The sensing unit, coupled to the DC power supply, is used for detecting the DC current and operating to generate a voltage signal according to the DC current. The control unit, coupled to the sensing unit, is used for determining whether a system circuit of the electronic device has a light load or a heavy load and generating an enable signal.
Claims8
A power saving circuit for an electronic device, comprising:
- a direct-current (DC) power supply, for providing a direct-current power;
- a sensing unit, coupled to the direct-current power supply, for detecting the direct-current power and operating to generate a voltage signal according to the direct-current power;
- a control unit, coupled to the sensing unit, for determining whether a system circuit of the electronic device has a light load or a heavy load according to the voltage signal and generating an enable signal;
- a heavy load high efficiency module, coupled to the control unit, for providing a first voltage to the system circuit of the electronic device according to the enable signal when the system circuit of the electronic device has the heavy load;
- and
- a light load high efficiency module, coupled to the control unit, for providing a second voltage to the system circuit of the electronic device according to the enable signal when the system circuit of the electronic device has the light load;
- wherein the first voltage is greater than the second voltage.
A power saving method for an electronic device, the power saving method comprising:
- detecting a direct-current (DC) power;
- operating to generate a voltage signal according to the direct-current power;
- determining whether a system circuit of the electronic device has a light load or a heavy load according to the voltage signal and generating an enable signal;
- and
- enabling different direct-current switching modules according to the enable signal when a load of the system circuit varies;
- wherein enabling the different direct-current switching modules according to the enable signal when the load of the system circuit varies comprises enabling a heavy load high efficiency module which provides a first voltage according to the enable signal when the system circuit of the electronic device has the heavy load, and enabling a light load high efficiency module which provides a second voltage according to the enable signal when the system circuit of the electronic device has the light load;
- wherein the first voltage is greater than the second voltage.
Dependencies are inferred from the claim text.