CN1212392A - Method for protecting CPU against damage owing to overvoltage and overcurrent - Google Patents
Method for protecting CPU against damage owing to overvoltage and overcurrent Download PDFInfo
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- CN1212392A CN1212392A CN 97116492 CN97116492A CN1212392A CN 1212392 A CN1212392 A CN 1212392A CN 97116492 CN97116492 CN 97116492 CN 97116492 A CN97116492 A CN 97116492A CN 1212392 A CN1212392 A CN 1212392A
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Abstract
The method for protecting CPU against damage caused by overvoltage and overcurrent is mainly characterized by that it detects whether the power supply of CPU produces overvoltage or overcurrent or not. Said invention uses the internal comparison circuit of switching voltage-regulation controller to compare the output voltage and current of power supply with preset values, if the power supply produces overvoltage or overcurrent, said comparison circuit can output a signal to shut ATX power supply off, or utilize self-protective characteristics of power supply, or cut the power supply circuit of the voltage regulated supply to stop supplying power to CPU so as to protect CPU against damage caused by overvoltage or overcurrent.
Description
The present invention is relevant a kind of CPU of protection damages CPU because of superpotential and excess current a method; refer in particular to a kind of output voltage and electric current by the detecting power supply unit; and control cuts off the power supply be supplied to CPU, with the method design that prevents that CPU from damaging because of superpotential and excess current.
Press, because the manufacturing specification of CPU does not have certain standard, make the employed electrical specification difference of all kinds CPU, therefore motherboard is installed the CPU of various labels for the user is provided, be provided with voltage switching device in motherboard, switch to suitable magnitude of voltage with the voltage that will supply CPU, the early stage practice is reached with the wire jumper seat, reach the conversion of magnitude of voltage by the variation of wire jumper seat, only this kind mode extremely bothers and has and sets wrong and possibility damage CPU, therefore each big motherboard manufacturer all is devoted to develop the device of automatic setting magnitude of voltage, personal host computer Plate supplying central processing unit supply voltage automatic setting method and circuit as patent announcement number No. 304239, and visual CPU kind of installing and automatically switch into suitable magnitude of voltage is exempted the trouble and inconvenience manually set.But; no matter be aforesaid wire jumper seat setting means; or the mode of motherboard automatic setting; when if the voltage stabilizer of power supply unit instability or motherboard damages; promptly might produce the situation of superpotential or excess current; if no suitable safeguard measure, superpotential or excess current will directly be imported CPU and cause the impaired result of CPU.
Edge this, fundamental purpose of the present invention promptly provides a kind of CPU of protection damages CPU because of superpotential and excess current method, mainly be the voltage that the detecting power supply unit is supplied to CPU, whether there is the phenomenon of superpotential or excess current to take place, utilize the comparator circuit of suitching type voltage-stabilizing controller inside, the output voltage of power supply unit and electric current and preset value are made comparisons, if when producing the situation of superpotential or excess current, then export the soft-switching of a signal, and close the ATX power supply unit with control ATX power supply unit; Or utilize the self-protection characteristic of power supply unit; Or cutting off the modes such as supply path of voltage stabilizer power source supply end, the stop supplies power supply is to CPU, to protect CPU not to be subjected to the impact of superpotential or excess current and to damage.
A kind of CPU of protection of the present invention damages the method for CPU because of superpotential and excess current, mainly be the voltage of detecting power supply unit supply CPU, whether there are superpotential or excess current phenomenon to take place, utilize the comparator circuit of suitching type voltage-stabilizing controller inside, the output voltage of power supply unit and electric current and preset value are made comparisons, if when producing the situation of overvoltage or overcurrent, then export the soft-switching of a signal with control ATX power supply unit, and close the ATX power supply unit, the stop supplies power supply is to CPU, to protect CPU not to be subjected to the impact of superpotential or excess current and to damage; Or utilize the self-protection characteristic of power supply unit, be provided with an on-off element between power supply unit output terminal and ground, if when producing the situation of superpotential or excess current, voltage stabilizer is promptly sent a signal and is made the on-off element conducting, and power supply is forced ground connection, stop power supply to CPU; Wherein this on-off element can be MOS transistor, SCR or other can be used as the electronic component of switch; Or utilize to switch the supply path mode of voltage stabilizer power source supply end, and between output end of voltage stabilizer and power input, be provided with an on-off element, when the situation of superpotential or excess current, this on-off element promptly is open-circuit condition, and the supply path of CPU is cut off; Wherein this on-off element can be MOS transistor, SCR or other can be used as the electronic component of switch; Wherein include in this suitching type voltage-stabilizing controller: a digital analog converter, be that the magnitude of voltage that Basic Input or Output System (BIOS) sets is converted to analog voltage and current value, with reference voltage level as over-voltage comparator, and the reference current value of excess current comparer; One over-voltage comparator and an excess current comparer, when the voltage that is detected or electric current exceed preset value, promptly send a signal to or door; One or door, be the output of integrating superpotential and excess current comparer, when wherein a kind of situation takes place, promptly send a signal; Wherein in power input and be supplied between the cpu power end, be provided with the inductance and the resistance of a series connection, and node and the CPU voltage end between this resistance and inductance certainly, voltage drop value with this resistance is connected to the converter of being located in the switching type voltage stabilizer respectively, and whether the phenomenon of superpotential and excess current is arranged with intercepting and detection.
For enabling further to understand purpose of the present invention, feature and effect, now by following specific embodiment, and conjunction with figs., the present invention is described in detail, illustrate as the back:
Fig. 1 is the circuit diagram for first embodiment of the invention;
Fig. 2 is the circuit diagram for second embodiment of the invention;
Fig. 3 is the circuit diagram for third embodiment of the invention.
The present invention mainly is in 10 of the voltage end that is supplied to CPU and suitching type voltage-stabilizing controllers, voltage and electric current that intercepting is supplied, utilize the comparator circuit of suitching type voltage-stabilizing controller 10 inside, make comparisons with default voltage and current value, in two kinds of situations of over-voltage and over-current, wherein switch the step of power supply during a speciogenesis, and stop the computing of CPU, include three kinds of methods of cutting off power supply in the present invention, with three kinds of embodiment explanations, details are as follows respectively:
This first embodiment (as shown in Figure 1) is the soft-switching PS-ON with control ATX power supply unit connector 20, the safeguard measure during as superpotential or excess current.
The employed power supply of CPU be via the user after Basic Input or Output System (BIOS) (BIOS) is set its kind, be sent to suitching type voltage-stabilizing controller 10 via bus-bar 11, include in this suitching type voltage-stabilizing controller 10:
One digital analog converter 12 is that the magnitude of voltage that Basic Input or Output System (BIOS) sets is converted to analog voltage and current value, with reference voltage level as over-voltage comparator 13, and the reference current value of excess current comparer 14;
One over-voltage comparator 13 and an excess current comparer 14, when the voltage that is detected or electric current exceed preset value, promptly send a signal to or door 15;
One or door 15, be the output of integrating superpotential and excess current comparer 13,14, when wherein a kind of situation takes place, promptly send a signal.
The method applied in the present invention is in power input and the V that is supplied to CPU
COREBetween power end, be provided with inductance L and the resistance R 1 of a series connection, and the node between this resistance R 1 and inductance L certainly, reach the V of CPU
COREVoltage end, voltage drop value V with this resistance R 1 is connected to the converter of being located in the switching type voltage stabilizer 10 16 respectively, be connected to aforementioned excess current comparer 14 this pressure drop is converted to current value, and voltage is connected to aforementioned over-voltage comparator 13, output terminal aforementioned or door 15 then is connected in a converter 30, and analog signal exports to or an input end of door 40 so that digital signal is converted to.
When being electronegative potential as if the signal that is supplied to aforesaid soft-switching PS-ON, then the ATX power supply unit is promptly opened and power supply, if during noble potential, then close the ATX power supply unit, therefore when producing a kind of situation of superpotential or excess current, this or door 15 are promptly sent a noble potential to converter 30.
For the formula voltage-stabilizing controller 10 of avoiding switching damages, and the possibility of output over-voltage or excess current is arranged, the present invention is provided with a circuit for detecting (shown in Fig. 1 Lower Half) in addition, and it includes:
Resistance R 3 and R4 are to be series relationship, are the V with CPU
COREThe voltage dividing potential drop, and input to an input end of comparer 42;
One fixed voltage output circuit is made up of the resistance R 2 and the voltage stabilizing element 41 of series connection, and another input pin that exports comparer 42 to is arranged;
One comparer 42 is comparison predeterminated voltage values and be supplied to V
COREMagnitude of voltage, its output are connected to or door another input end of 40.
As the V that is supplied to CPU
COREVoltage just often, promptly deficiency is so that V
COREThe collapse of the voltage stabilizing element of voltage detection circuit, this voltage be through resistance R 3 and R4 voltage after partial, if less than default magnitude of voltage, then comparer 42 will export an electronegative potential to or a 4O; If be supplied to CPU because of 10 damages of suitching type voltage-stabilizing controller produce superpotential, even the collapse of the voltage stabilizing element of fixed voltage output circuit is higher than default magnitude of voltage and produce one, then comparer 42 will be exported a noble potential to gate 40.
Output terminal aforementioned or door 40 is the soft-switching PS-ON of control ATX power supply unit connector 20.The effect of this or door 40, promptly be when suitching type voltage-stabilizing controller 1O normal operation, to produce superpotential or overcurrent situations, or suitching type voltage-stabilizing controller 10 damages and when the situation of output over-voltage or excess current is arranged, as long as there is a kind of situation to take place, just the noble potential that is produced is sent to the soft-switching PS-ON of ATX power supply unit connector 20 with the supply of cutting off the electricity supply, otherwise if all just often, or door 40 is promptly exported electronegative potential and is kept the normal power supply of ATX power supply unit.
This second embodiment (as Fig. 2) is a characteristic of utilizing power supply unit self-protection, when the situation of superpotential or excess current takes place, power supply unit is forced ground connection, so promptly can not damage power supply unit, also can not provide V
COREVoltage is to CPU.The present embodiment and first embodiment are roughly the same, only should or the output terminal of door 40 be to be connected in an on-off element 50 (can use MOS transistor, SCR or other to can be used as the electronic component of switch), when the situation of superpotential or excess current, even or door these on-off element 50 conductings of 40 high potential signals of being sent and the power supply of power supply unit is forced ground connection.
This 3rd embodiment (as Fig. 3) is the supply path mode of input end of cutting off the electricity supply, and mainly is the V in CPU
COREBetween power end and power input, set up an on-off element 60 (it can be MOS transistor or other can be used as the element of switch), cut off supply V by the open and close of this on-off element 50 of control
COREThe path of voltage.The present embodiment and first embodiment are roughly the same, only should or the output terminal of door 40 be to be connected in aforesaid on-off element 60, when the situation of superpotential or excess current, this on-off element 60 promptly is open-circuit condition, and with V
CORESupply path cut off, so just do not have any power source and be supplied to the CPU running.
In sum, but the true disclosed idea of mat of the present invention, and to damaging because of power supply unit shakiness or voltage stabilizer, and the situation of output over-voltage or overcurrent damage CPU proposes effective solution; Further, increase the function that traditional methods does not have, tool novelty, practicality and industrial utilization, the real application important document that has met the Patent Law patent of invention, the whence in accordance with the law the mere formality application it.
Below the present invention has been done a detailed description, only the above person only is preferred embodiment of the present invention, when not limiting scope of the invention process.Be that all equalizations of doing according to the present patent application scope change and modify etc., all should still belong in the patent covering scope of the present invention.
Claims (7)
1. method of protecting CPU to damage CPU because of superpotential and excess current; it is characterized in that; mainly be the voltage of detecting power supply unit supply CPU; whether there are superpotential or excess current phenomenon to take place; utilize the comparator circuit of suitching type voltage-stabilizing controller inside; the output voltage of power supply unit and electric current and preset value are made comparisons; if when producing the situation of overvoltage or overcurrent; then export the soft-switching of a signal with control ATX power supply unit; and close the ATX power supply unit; the stop supplies power supply is to CPU, to protect CPU not to be subjected to the impact of superpotential or excess current and to damage.
2. method of protecting CPU to damage CPU because of superpotential and excess current; it is characterized in that; mainly be the voltage of detecting power supply unit supply CPU; whether there are superpotential or excess current phenomenon to take place; utilize the comparator circuit of suitching type voltage-stabilizing controller inside; the output voltage of power supply unit and electric current and preset value are made comparisons; utilize the self-protection characteristic of power supply unit; in between power supply unit output terminal and ground, be provided with an on-off element; if when producing the situation of superpotential or excess current; voltage stabilizer is promptly sent a signal and is made the on-off element conducting, and power supply is forced ground connection, stops power supply to CPU.
3. the method for damaging CPU because of superpotential and excess current by the described protection of claim 2 CPU is characterized in that, wherein this on-off element can be MOS transistor, SCR or other can be used as the electronic component of switch.
4. method of protecting CPU to damage CPU because of superpotential and excess current; it is characterized in that; mainly be the voltage of detecting power supply unit supply CPU; whether there are superpotential or excess current phenomenon to take place; utilize the comparator circuit of suitching type voltage-stabilizing controller inside; the output voltage of power supply unit and electric current and preset value are made comparisons; utilize the supply path mode of cutting off the voltage stabilizer power source supply end; in between output end of voltage stabilizer and power input, be provided with an on-off element; when the situation of superpotential or excess current; this on-off element promptly is open-circuit condition, and the supply path of CPU is cut off.
5. the method for damaging CPU because of superpotential and excess current by the described protection of claim 4 CPU is characterized in that, wherein this on-off element can be MOS transistor, SCR or other can be used as the electronic component of switch.
6. the method for damaging CPU because of superpotential and excess current by claim 1,2 or 4 described protection CPU is characterized in that, wherein includes in this suitching type voltage-stabilizing controller:
One digital analog converter is that the magnitude of voltage that Basic Input or Output System (BIOS) sets is converted to analog voltage and current value, with reference voltage level as over-voltage comparator, and the reference current value of excess current comparer;
One over-voltage comparator and an excess current comparer, when the voltage that is detected or electric current exceed preset value, promptly send a signal to or door;
One or door, be the output of integrating superpotential and excess current comparer, when wherein a kind of situation takes place, promptly send a signal.
7. by claim 1, the 2 or 4 described methods of protecting CPU to damage CPU because of superpotential and excess current; it is characterized in that; wherein in power input and be supplied between the cpu power end; be provided with the inductance and the resistance of a series connection; and node and the CPU voltage end between this resistance and inductance certainly; voltage drop value with this resistance is connected to the converter of being located in the switching type voltage stabilizer respectively, and whether the phenomenon of superpotential and excess current is arranged with intercepting and detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97116492A CN1085356C (en) | 1997-09-23 | 1997-09-23 | Method for protecting CPU against damage owing to overvoltage and overcurrent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97116492A CN1085356C (en) | 1997-09-23 | 1997-09-23 | Method for protecting CPU against damage owing to overvoltage and overcurrent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1212392A true CN1212392A (en) | 1999-03-31 |
| CN1085356C CN1085356C (en) | 2002-05-22 |
Family
ID=5173900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97116492A Expired - Lifetime CN1085356C (en) | 1997-09-23 | 1997-09-23 | Method for protecting CPU against damage owing to overvoltage and overcurrent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1085356C (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100343786C (en) * | 2000-12-26 | 2007-10-17 | 神基科技股份有限公司 | Power supply monitoring and protecting system |
| CN100383706C (en) * | 2005-04-08 | 2008-04-23 | 鸿富锦精密工业（深圳）有限公司 | CPU power supply circuit with protection circuit |
| CN101261856B (en) * | 2007-03-08 | 2011-05-18 | 日立乐金资料储存股份有限公司 | Built-in type optical disc apparatus |
| CN101943938B (en) * | 2009-07-08 | 2012-07-25 | 新唐科技股份有限公司 | Power supply control device and system using same |
| CN105591538A (en) * | 2014-10-21 | 2016-05-18 | 联想(北京)有限公司 | Universal serial bus power transmission device |
| CN105718012A (en) * | 2014-12-02 | 2016-06-29 | 厦门雅迅网络股份有限公司 | Method and circuit for automatically switching Vbus voltage in master/slave mode of OTG device |
| CN107710167A (en) * | 2015-10-26 | 2018-02-16 | 株式会社东芝 | Electronic equipment |
| CN107979061A (en) * | 2016-10-25 | 2018-05-01 | 中惠创智（深圳）无线供电技术有限公司 | One kind protection circuit and circuit system |
| CN107979362A (en) * | 2016-10-25 | 2018-05-01 | 中惠创智（深圳）无线供电技术有限公司 | A kind of circuit system and power device Drive Protecting Circuit |
| CN113839566A (en) * | 2020-06-24 | 2021-12-24 | 宏碁股份有限公司 | Power supply device for eliminating overcurrent protection misoperation |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4414598A (en) * | 1982-06-04 | 1983-11-08 | Honeywell Information Systems Inc. | Regulated power supply |
| CN87210399U (en) * | 1987-07-21 | 1988-08-10 | 张同岗 | All-functional protector |
| CN2114912U (en) * | 1992-03-28 | 1992-09-02 | 常智 | Automatic switch with multi-protective function |
-
1997
- 1997-09-23 CN CN97116492A patent/CN1085356C/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100343786C (en) * | 2000-12-26 | 2007-10-17 | 神基科技股份有限公司 | Power supply monitoring and protecting system |
| CN100383706C (en) * | 2005-04-08 | 2008-04-23 | 鸿富锦精密工业（深圳）有限公司 | CPU power supply circuit with protection circuit |
| CN101261856B (en) * | 2007-03-08 | 2011-05-18 | 日立乐金资料储存股份有限公司 | Built-in type optical disc apparatus |
| CN101943938B (en) * | 2009-07-08 | 2012-07-25 | 新唐科技股份有限公司 | Power supply control device and system using same |
| CN105591538B (en) * | 2014-10-21 | 2018-06-29 | 联想(北京)有限公司 | Universal serial bus power transfering device |
| CN105591538A (en) * | 2014-10-21 | 2016-05-18 | 联想(北京)有限公司 | Universal serial bus power transmission device |
| CN105718012A (en) * | 2014-12-02 | 2016-06-29 | 厦门雅迅网络股份有限公司 | Method and circuit for automatically switching Vbus voltage in master/slave mode of OTG device |
| CN107710167A (en) * | 2015-10-26 | 2018-02-16 | 株式会社东芝 | Electronic equipment |
| CN107710167B (en) * | 2015-10-26 | 2020-12-15 | 株式会社东芝 | Electronic device |
| CN107979061A (en) * | 2016-10-25 | 2018-05-01 | 中惠创智（深圳）无线供电技术有限公司 | One kind protection circuit and circuit system |
| CN107979362A (en) * | 2016-10-25 | 2018-05-01 | 中惠创智（深圳）无线供电技术有限公司 | A kind of circuit system and power device Drive Protecting Circuit |
| CN107979362B (en) * | 2016-10-25 | 2021-08-24 | 中惠创智（深圳）无线供电技术有限公司 | Circuit system and power device driving protection circuit |
| CN113839566A (en) * | 2020-06-24 | 2021-12-24 | 宏碁股份有限公司 | Power supply device for eliminating overcurrent protection misoperation |
| CN113839566B (en) * | 2020-06-24 | 2023-07-21 | 宏碁股份有限公司 | Power supply device for eliminating overcurrent protection misoperation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1085356C (en) | 2002-05-22 |
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| C14 | Grant of patent or utility model | ||
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Micro One Electronics (Kunshan) Inc. Assignor: Weixing Science & Technology Co., Ltd. Contract fulfillment period: 2008.3.25 to 2016.3.25 contract change Contract record no.: 2009990000088 Denomination of invention: Method for protecting CPU against damage owing to overvoltage and overcurrent Granted publication date: 20020522 License type: Exclusive license Record date: 2009.2.16 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.3.25 TO 2016.3.25; CHANGE OF CONTRACT Name of requester: WEIMENG ELECTRONIC ( KUNSHAN ) CO., LTD. Effective date: 20090216 |
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| CX01 | Expiry of patent term |
Granted publication date: 20020522 |
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| CX01 | Expiry of patent term |