CN101212139A - Main board power supply protection circuit - Google Patents
Main board power supply protection circuit Download PDFInfo
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- CN101212139A CN101212139A CNA2006100646353A CN200610064635A CN101212139A CN 101212139 A CN101212139 A CN 101212139A CN A2006100646353 A CNA2006100646353 A CN A2006100646353A CN 200610064635 A CN200610064635 A CN 200610064635A CN 101212139 A CN101212139 A CN 101212139A
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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
The invention relates to a kind of main board power supply protection circuit, especially a kind of main board power supply protection circuit that can detect CPU (Central Processing Unit, central processing unit) power supply situation automatically.
Background technology
The computer power plug has and has transmitted a power control signal (PSON# signal) on the stitch, and this signal is used for controlling the power supply power supply.During start, treat that power switch button (Power Button) on the computer is pressed after, this PSON# signal is by the control of I/O (Input/Output input and output) controller and change a low level into, power supply begins power supply; During the power supply power supply, continue about 4 seconds kinds of pushing power switch button, I/O (Input/Output input and output) controller is controlled at the PSON# signal that stops output low level after 4 seconds, and power supply 2 ends power supply, continues 4 seconds push switch buttons when this process is forced shutdown and the process of shutting down.
Along with the lifting of CPU (Central Processing Unit, central processing unit) running frequency, its power consumption is more and more higher, so computer power provides the plug of powering for CPU specially.Present user's some minor issues of settlement computer that trend towards doing it yourself more, for example inserting element or cleaning cpu fan etc. on motherboard, when carrying out these operations, operation and security consideration for convenience, the user tends to the power line of electric power connecting on mainboard pulled out, treat the operation finish after, again these power lines are plugged, but because the cpu power line is not too eye-catching, the user usually only connects the motherboard power supply line and forgets and connect the cpu power line.In this case, after user's start, power supply can not be realized the power supply to CPU, but still gives main board power supply.If this situation continues for some time, and because initially the enabling level and might be low level (high level is effective) of I/O (input and output) controller, the I/O controller of the mainboard of some will enter suspended state at this moment, do not receive and send any input/output signal, power switch signal can't be identified, thereby cause motherboard power supply to be cut off, mainboard is in charged non operating state for a long time, and is very big to the mainboard infringement like this.
Summary of the invention
In view of above content, be necessary to provide a kind of and can detect the CPU power supply situation automatically, and the power supply protection circuit that mainboard is protected.
A kind of main board power supply protection circuit; be used for protecting the mainboard that does not connect the central processing unit power line; this main board power supply protection circuit comprises an IOC and an ACPI controller; this main board power supply protection circuit comprises that also a control signal generation circuit and an enable signal produce circuit; this control signal generation circuit produces a control signal according to the power supply situation of this central processing unit; and be fed to this IOC; this enable signal produces circuit and produces an enable signal simultaneously; so that this this control signal of IOC normal process; when the central processing unit power line did not correctly connect, this control signal made this IOC transmit off signal and stops power supply with the control power supply to this ACPI controller.
Compare with original technology, this main board power supply protection circuit has higher reliability and fail safe, can fast detecting go out the CPU power supply situation when start, if the appearance of CPU power supply situation unusually then can be guaranteed automatic shutdown, protects mainboard in time.
Description of drawings
Fig. 1 is the circuit diagram of main board power supply protection circuit one preferred embodiment of the present invention.
Embodiment
See also Fig. 1, main board power supply protection circuit of the present invention comprises that a control signal generation circuit 10 and an enable signal produce circuit 30.
This control signal generation circuit 10 comprises one first triode Q1, one second field effect transistor Q2 and one the 3rd field effect transistor Q3.The base stage of this first triode Q1 links to each other with the output P1 of the operate as normal signal S1 of power supply 50 by one first resistance R 1, its collector electrode by one provide on one second resistance R 2 and the mainboard+the main board power supply end of 5V operating voltage links to each other, its emitter links to each other with the drain electrode of this second field effect transistor Q2.The grid of this second field effect transistor Q2 is by one the 3rd resistance R 3 and CPU (Central Processing Unit, central processing unit) operating voltage control end P2 links to each other, this control end P2 produces an operating voltage index signal S2, this second field effect transistor Q2 source ground, one the 4th resistance is connected between the grid and source electrode of this second field effect transistor Q2.The grid of the 3rd field effect transistor Q3 connects the emitter of this first triode Q1, its drain electrode output one control signal, when the power supply of CPU occurs when unusual, this control signal will change switching signal PWRBTN#, this drain electrode simultaneously connects Computer power sources switch 60, its source ground, one the 5th resistance R 5 is connected between the grid and source electrode of the 3rd field effect transistor Q3.
This enable signal produces circuit 30 and comprises one the 4th field effect transistor Q4, one the 5th triode Q5 and one the 6th field effect transistor Q6.The grid of the 4th field effect transistor Q4 connects the emitter of this first triode Q1, its source ground, drain electrode connects the collector electrode of the 5th triode Q5, the base stage of the 5th triode Q5 meets an output P3 of ACPI (Advanced Configuration and PowerInterface ACPI) controller 70 by one the 6th resistance R 6, its collector electrode connects mainboard+5V feeder ear, its grounded emitter by one the 7th resistance R 7.The grid of the 6th field effect transistor Q6 connects the collector electrode of the 5th triode Q5, its drain electrode output one auxiliary signal PWRGD delivers to the Enable Pin P4 of I/O (Input/Output input and output) controller 80, this drain electrode connects mainboard+3.3V feeder ear by one the 8th resistance R 8, its source ground, one first capacitor C is connected between the drain electrode and source electrode of the 6th field effect transistor Q6, is used to stablize the output signal PWRGD of the 6th field effect transistor Q6 drain electrode.
Introduce the course of work of this circuit below.
If power supply does not connect for the power cable of CPU, to CPU normal power supply not, in Fig. 1, the S2 signal is a low level, does not have bias voltage between this second field effect transistor Q2 grid and source electrode, and this second field effect transistor Q2 ends.This first triode Q1 conducting under the effect of the signal S1 of+5v voltage signal and high level, its emitter is exported a high level, promptly produce a bias voltage between the grid of the 3rd field effect transistor Q3 and the source electrode, and make the 3rd field effect transistor Q3 conducting, the control signal of the 3rd field effect transistor Q3 drain electrode output is low level at this moment, thereby the switching signal PWRBTN# that is connected with the drain electrode of the 3rd field effect transistor Q3 becomes low level by high level; And simultaneously the grid of the 4th field effect transistor Q4 that links to each other at emitter with this first triode Q1 is a high level; the 4th field effect transistor Q4 conducting; its drain electrode output one low level; promptly the 6th field effect transistor Q6 grid is a low level; the 6th field effect transistor Q6 ends; because the 6th field effect transistor Q6 drain electrode links to each other with the 3.3V feeder ear that mainboard provides; so its drain electrode output one high level auxiliary signal PWRGD; to guarantee that this I/O controller 80 continues operate as normal; and can handle this low level PWRBTN# signal; after about 4 seconds; this I/O controller 80 stops the PSON# signal of output low level and gives ACPI controller 70, and ACPI controller 70 sends instruction makes it stop power supply and mainboard is protected to power supply 50.
If power supply connects for the power cable of CPU, the CPU power supply is normal, signal S2 is a high level, this signal S2 inputs to the grid of this second field effect transistor Q2 by the 3rd resistance R 3, this second field effect transistor Q2 conducting, its drain electrode output one low level, promptly the grid of the 3rd transistor Q3 is a low level, the 3rd transistor Q3 ends, and switching signal PWRBTN# is unaffected, continues to keep high level.This moment, the grid of the 4th field effect transistor Q4 also was a low level, and the 4th field effect transistor Q4 ends.Because it is normal to the power supply of CPU, this signal S2 is a high level, S1 signal and this high level signal S2 of power supply 50 outputs together are input to ACPI controller 70, this ACPI controller 70 output P3 export a high level signal S3, this signal S3 is input to the base stage of the 5th triode Q5 by the 6th resistance R 6, the 5th triode Q5 conducting, its collector electrode is exported a low level, promptly the 6th field effect transistor Q6 grid is a low level, the 6th field effect transistor Q6 ends, its drain electrode output one high level auxiliary signal PWRGD, to guarantee that this I/O controller 80 continues operate as normal, this switching signal PWRBTN# keeps high level, and the PSON# signal that this I/O controller 80 continues output low level is given ACPI controller 70, and then makes it continue normal power supply by the 70 transmission instructions of ACPI controller to power supply 50.
Claims (7)
1. main board power supply protection circuit; be used for protecting the mainboard that does not connect the central processing unit power line; this main board power supply protection circuit comprises an IOC and an ACPI controller; it is characterized in that: this main board power supply protection circuit comprises that also a control signal generation circuit and an enable signal produce circuit; this control signal generation circuit produces a control signal according to the power supply situation of this central processing unit; and be fed to this IOC; this enable signal produces circuit and produces an enable signal simultaneously; so that this this control signal of IOC energy normal process; when this central processing unit power line did not correctly connect, this control signal made this IOC transmit off signal and stops power supply with the control power supply to this ACPI controller.
2. main board power supply protection circuit as claimed in claim 1; it is characterized in that: this main board power supply protection circuit also comprises a central processing unit operating voltage control end; this central processing unit operating voltage control end is exported an index signal according to the power supply situation of this central processing unit; this index signal is a high level when this central processing unit power line correctly connects, and this index signal is not a low level when this central processing unit power line correctly connects.
3. main board power supply protection circuit as claimed in claim 2 is characterized in that: an operate as normal signal of this index signal and the output of this power supply is together delivered to this control signal generation circuit, and this control signal generation circuit is exported this control signal according to this two signal.
4. main board power supply protection circuit as claimed in claim 3; it is characterized in that: this control signal generation circuit comprises one first triode; one second field effect transistor and one the 3rd field effect transistor; the operate as normal signal of this power supply output is delivered to this first transistor base; this first transistor collector connects the main board power supply end; its collector electrode connects the drain electrode of this second field effect transistor; the index signal of this central processing unit operating voltage control end output is delivered to the grid of this second field effect transistor; this second field effect transistor source ground; its drain electrode links to each other with the grid of the 3rd field effect transistor; the 3rd fet gate connects the emitter of this first triode; its source ground, this control signal is by its drain electrode output.
5. main board power supply protection circuit as claimed in claim 4; it is characterized in that: this enable signal produces circuit and comprises one the 4th field effect transistor; one the 5th triode and one the 6th field effect transistor; the 4th fet gate connects the emitter of this first triode; its source ground; its drain electrode connects the collector electrode of the 5th triode; the base stage of the 5th triode connects an output of this ACPI controller; its grounded emitter; the grid of the 6th field effect transistor connects the collector electrode of the 5th triode; its drain electrode connects the main board power supply end by one the 8th resistance; this enable signal is by the drain electrode output of the 6th field effect transistor, its source ground.
6. main board power supply protection circuit as claimed in claim 5 is characterized in that: connecting between the drain electrode of the 6th field effect transistor and the source electrode one is used to stablize first electric capacity of this enable signal output.
7. main board power supply protection circuit as claimed in claim 5; it is characterized in that: this operate as normal signal and this index signal are delivered to this ACPI controller simultaneously; when this two signal is high level simultaneously; high level of this ACPI controller output is to the base stage of the 5th triode; if this two signal has one to be low level, then low level of this ACPI controller output is to the base stage of the 5th triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100646353A CN101212139A (en) | 2006-12-29 | 2006-12-29 | Main board power supply protection circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100646353A CN101212139A (en) | 2006-12-29 | 2006-12-29 | Main board power supply protection circuit |
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| CN101212139A true CN101212139A (en) | 2008-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2006100646353A Pending CN101212139A (en) | 2006-12-29 | 2006-12-29 | Main board power supply protection circuit |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103092314A (en) * | 2013-01-24 | 2013-05-08 | 浪潮电子信息产业股份有限公司 | Server combined circuit |
| CN103414459A (en) * | 2013-09-05 | 2013-11-27 | 青岛歌尔声学科技有限公司 | Analog signal input control circuit with forbidding/enabling functions |
| CN103810079A (en) * | 2012-11-13 | 2014-05-21 | 联想(北京)有限公司 | Cue circuit and electronic equipment |
| CN104423519A (en) * | 2013-08-27 | 2015-03-18 | 鸿富锦精密工业(武汉)有限公司 | Mainboard power supply system |
| CN105867525A (en) * | 2015-01-21 | 2016-08-17 | 鸿富锦精密工业(武汉)有限公司 | Mainboard and electronic apparatus applying same |
| CN109426328A (en) * | 2017-09-05 | 2019-03-05 | 鸿富锦精密工业(武汉)有限公司 | Mainboard protection circuit |
| CN110011649A (en) * | 2019-03-26 | 2019-07-12 | 山东超越数控电子股份有限公司 | One kind switching power supply system, method and operation terminal based on DCPS digitally controlled power source |
| CN110096382A (en) * | 2018-01-31 | 2019-08-06 | 鸿富锦精密工业(武汉)有限公司 | The electronic device of mainboard and the application mainboard |
| CN113036745A (en) * | 2019-12-25 | 2021-06-25 | 仁宝电脑工业股份有限公司 | Electronic device for power protection of connection port and method thereof |
-
2006
- 2006-12-29 CN CNA2006100646353A patent/CN101212139A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103810079B (en) * | 2012-11-13 | 2016-12-28 | 联想(北京)有限公司 | A kind of cue circuit and electronic equipment |
| CN103810079A (en) * | 2012-11-13 | 2014-05-21 | 联想(北京)有限公司 | Cue circuit and electronic equipment |
| CN103092314A (en) * | 2013-01-24 | 2013-05-08 | 浪潮电子信息产业股份有限公司 | Server combined circuit |
| CN104423519A (en) * | 2013-08-27 | 2015-03-18 | 鸿富锦精密工业(武汉)有限公司 | Mainboard power supply system |
| CN104423519B (en) * | 2013-08-27 | 2017-03-15 | 鸿富锦精密工业(武汉)有限公司 | Mainboard power supply system |
| CN103414459B (en) * | 2013-09-05 | 2016-04-13 | 青岛歌尔声学科技有限公司 | With the analog signal input control circuit of forbidden energy/ena-bung function |
| CN103414459A (en) * | 2013-09-05 | 2013-11-27 | 青岛歌尔声学科技有限公司 | Analog signal input control circuit with forbidding/enabling functions |
| CN105867525A (en) * | 2015-01-21 | 2016-08-17 | 鸿富锦精密工业(武汉)有限公司 | Mainboard and electronic apparatus applying same |
| CN109426328A (en) * | 2017-09-05 | 2019-03-05 | 鸿富锦精密工业(武汉)有限公司 | Mainboard protection circuit |
| CN110096382A (en) * | 2018-01-31 | 2019-08-06 | 鸿富锦精密工业(武汉)有限公司 | The electronic device of mainboard and the application mainboard |
| CN110096382B (en) * | 2018-01-31 | 2022-07-05 | 鸿富锦精密工业(武汉)有限公司 | Mainboard and electronic device applying same |
| CN110011649A (en) * | 2019-03-26 | 2019-07-12 | 山东超越数控电子股份有限公司 | One kind switching power supply system, method and operation terminal based on DCPS digitally controlled power source |
| CN113036745A (en) * | 2019-12-25 | 2021-06-25 | 仁宝电脑工业股份有限公司 | Electronic device for power protection of connection port and method thereof |
| CN113036745B (en) * | 2019-12-25 | 2023-10-13 | 仁宝电脑工业股份有限公司 | Electronic device for power protection of connection port and method thereof |
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Open date: 20080702 |