Main board power supply protection circuit

A power supply protection, motherboard technology, applied in emergency protection circuit devices, electrical components, data processing power supplies, etc., can solve problems such as damage to the motherboard, the motherboard is in a charged non-working state, and the power switch signal cannot be identified, and achieve timely protection and assurance. The effect of automatic shutdown, high reliability and safety

Inactive Publication Date: 2008-07-02
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

In this case, after the user turns it on, the power supply cannot supply power to the CPU, but still supplies power to the motherboard.
If this situation continues for a period of time, and because the initial enable level of the I/O (input and output) controller may be low level (high level active), at this time some I/O controllers of th

Method used

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  • Main board power supply protection circuit

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Embodiment Construction

[0008] Please refer to FIG. 1 , the motherboard power supply protection circuit of the present invention includes a control signal generating circuit 10 and an enabling signal generating circuit 30 .

[0009] The control signal generating circuit 10 includes a first transistor Q1, a second field effect transistor Q2 and a third field effect transistor Q3. The base of the first triode Q1 is connected to the output terminal P1 of the normal operation signal S1 of the power supply 50 through a first resistor R1, and its collector is connected to a mainboard providing +5V working voltage on the mainboard through a second resistor R2 The power supply terminal is connected, and its emitter is connected to the drain of the second field effect transistor Q2. The gate of the second field effect transistor Q2 is connected to the working voltage control terminal P2 of the CPU (Central Processing Unit, central processing unit) through a third resistor R3, and the control terminal P2 gener...

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Abstract

The invention relates to a power supply protection circuit for a main board used for protecting the main board of a power cord in an unconnected central processor unit. The power supply protection circuit for the main board comprises an input and output controller, an advanced configuration and a power interface controller. The power supply protection circuit for the main board also comprises a controlling signal generation circuit and an enabling signal generating circuit. The controlling signal generation circuit generates a controlling signal according to the power supply condition of the central processor unit and the signal is sent into the input and output controller. At the same time, the enabling signal generating circuit generates an enabling signal which causes the input and output controller to process the controlling signal normally. When the power cord of the central processor is wrongly connected, the controlling signal causes the input and output controller to send a shutdown signal to the advanced configuration and the power interface controller to stop power supply. The power supply protection circuit of the main board can carry out protection for the main board with an occurrence of abnormal power state on the central processor unit.

Description

technical field [0001] The invention relates to a mainboard power supply protection circuit, in particular to a mainboard power supply protection circuit which can automatically detect the power supply status of a CPU (Central Processing Unit, central processing unit). Background technique [0002] A pin of the computer power plug transmits a power control signal (PSON# signal), which is used to control the power supply. When starting up, after the power switch button (Power Button) on the computer is pressed, the PSON# signal is controlled by the I / O (Input / Output input and output) controller to change to a low level, and the power supply starts to supply power; , keep pressing the power switch button for about 4 seconds, the I / O (Input / Output input and output) controller will stop outputting the low-level PSON# signal after 4 seconds, and the power supply 2 will stop supplying power. This process is a forced shutdown Press the switch button for 4 seconds to shut down the ...

Claims

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Application Information

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IPC IPC(8): H02H11/00G06F1/26G06F1/28
Inventor 任泽书陈齐杰
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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