Mainboard and power control device thereof
AssigneeVIA Technologies, Inc.
InventorsHenry Hsieh, Paul Su
Life of this patent
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Abstract
A power control device includes a comparison unit, a control unit and a switch unit. The comparison unit electrically connects to a first power rail and a second power rail, respectively, and generates a comparing signal according to a reference signal, a first voltage level and a second voltage level. The control unit electrically connects to the comparison unit for receiving the comparing signal. Then, the control unit generates a control signal based on the comparing signal. The switch unit electrically connects to the control unit, and is on/off based on the control signal, so as to connect/disconnect the first power rail and the second power rail.
Claims20
A power control device, which is cooperated with a first power rail and a second power rail, wherein the first power rail and the second power rail are respectively coupled to a chip for providing a first voltage level to the chip through the first power rail and a second voltage level to the chip through the second power rail, the power control device comprising:
- a comparison unit, which electrically connects to the first power rail and the second power rail, respectively, and generates a comparing signal according to a reference signal, the first voltage level and the second voltage level;
- a control unit, which electrically connects to the comparison unit for receiving the comparing signal and generates a control signal based on the comparing signal;
- and
- a switch unit, which electrically connects to the control unit, and is turned on/off based on the control signal so as to connect/disconnect the first power rail and the second power rail.
A mainboard, comprising:
- a chip;
- a first power rail, which provides a first voltage level to the chip;
- a second power rail, which provides a second voltage level to the chip;
- a comparison unit, which electrically connects to the first power rail and the second power rail, respectively, and generates a comparing signal according to a reference signal, the first voltage level and the second voltage level;
- a control unit, which electrically connects to the comparison unit for receiving the comparing signal and generates a control signal based on the comparing signal;
- and
- a switch unit, which electrically connects to the control unit, and is turned on/off based on the control signal so as to connect/disconnect the first power rail and the second power rail.
An apparatus coupled between a first power rail and a second power rail for power controlling, wherein the first power rail and the second power rail also electrically coupled to a chip for providing a first voltage level and a second voltage level respectively, comprising:
- a switch unit, which receives a control signal and is turned on/off based on the control signal so as to connect/disconnect the first power rail and the second power rail.
Dependencies are inferred from the claim text.