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Mainboard

Inactive Publication Date: 2014-04-02
HONG FU JIN PRECISION IND WUHAN CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the PCI-E slot still has power when it is in the soft shutdown state, and it will consume power when a PCI-E device is installed on the PCI-E slot
Sometimes it exceeds the energy-saving requirements of EU certification (EU certification requires that the power consumption of the system should not exceed 1W in the soft shutdown state), but fails to meet the energy-saving requirements

Method used

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Embodiment Construction

[0010] see figure 1 , which is a circuit diagram of a preferred embodiment of the motherboard of the present invention. A motherboard 1 includes a first power supply 40 , a filter capacitor C and a PCI-E slot 50 . The PCI-E slot 50 includes a power supply pin 51, the power supply pin 51 of the PCI-E slot 50 receives the voltage output from the first power supply 40 to drive the PCI-E slot 50 to work, and is grounded via the filter capacitor C simultaneously. . The motherboard 1 also includes a soft shutdown detection unit 10 , a power control circuit 20 and a discharge circuit 30 . The soft shutdown detection unit 10 detects whether the motherboard 1 receives a soft shutdown command, and outputs a first control signal when detecting that the motherboard 1 receives the soft shutdown command, and the power control circuit 20 is used for Under the control of the first control signal, the power supply from the first power supply 40 to the power supply pin 51 of the PCI-E slot 5...

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Abstract

The invention relates to a mainboard. The mainboard comprises a first power supply, a filtering capacitor, a PCI-E slot, a soft power-off detection unit, a power supply control circuit and a discharging circuit, wherein the PCI-E slot comprises a power pin; the power pin of the PCI-E slot is used for receiving voltage output by the first power supply to drive the PCI-E slot to work, and is grounded via the filtering capacitor; the soft power-off detection circuit is used for detecting whether the mainboard receives a soft power-off instruction or not, and outputting a first control signal after detecting that the mainboard receives the soft power-off instruction; the power supply control circuit is used for switching off the power supply of the first power supply to the power pin of the PCI-E slot under the control of the first control signal, the discharging circuit is connected in parallel with the filtering capacitor; when the power control circuit switches off the power supply of the first power supply to the PCI-E slot, the residual electric energy of the filtering capacitor and the PCI-E slot is discharged through the discharging circuit.

Description

technical field [0001] The invention relates to a main board. Background technique [0002] Peripheral Component Interconnect Express (PCI-E) on the motherboard is one of the commonly used bus interfaces in personal computers. In the existing PCI-E slot power supply circuit, an external power supply is connected to the power pin of the PCI-E slot to provide a 3.3V power supply for the PCI-E slot, and the power supply of the PCI-E slot The pin is connected to a filter capacitor at the same time. Usually, when the mainboard is in soft shutdown state, the 3.3V power supply continues to supply power, and the filter capacitor has not been fully discharged. Therefore, the PCI-E slot still has power when it is in the soft-off state, and it will consume power when a PCI-E device is installed on the PCI-E slot. Sometimes it exceeds the energy-saving requirements of EU certification (EU certification requires that the power consumption of the system should not exceed 1W in the soft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F1/16G06F1/32
CPCG06F1/3253Y02D10/00
Inventor 陈俊生
Owner HONG FU JIN PRECISION IND WUHAN CO LTD