CN109193562A - A kind of thermal-shutdown circuit and generic server of server master board - Google Patents
A kind of thermal-shutdown circuit and generic server of server master board Download PDFInfo
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- CN109193562A CN109193562A CN201811214898.7A CN201811214898A CN109193562A CN 109193562 A CN109193562 A CN 109193562A CN 201811214898 A CN201811214898 A CN 201811214898A CN 109193562 A CN109193562 A CN 109193562A
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- master board
- temperature
- server master
- circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
- H02H5/042—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using temperature dependent resistors
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Abstract
The invention discloses a kind of thermal-shutdown circuit of server master board and generic servers, including temperature sensing circuit and power control circuit.The application is in view of the metal-oxide-semiconductor on server master board in VR route is compared to other electronic components; it is working frequency highest; heat accumulation is maximum; most easily there is the electronic component damaged; so the thermal-shutdown circuit of the application detects the temperature of metal-oxide-semiconductor position in VR route; if the temperature is not more than preset temperature threshold, it is believed that metal-oxide-semiconductor is normal, server master board is in a safe condition, then does not do protection act；If the temperature is greater than preset temperature threshold, think that metal-oxide-semiconductor exception, server master board are in over-temperature condition, then be cut to server master board power supply two DC power supplies for electricity output, guarantee the energy source that server master board does not catch fire further, to avoid server master board from burning, and then improve the safety and reliability of generic server.
Description
Technical field
The present invention relates to server fields, more particularly to the thermal-shutdown circuit and generic service of a kind of server master board
Device.
Background technique
Currently, generic server is used widely in numerous areas.For generic server, server master board
It is its important component.In the prior art, server master board is generally directly powered by two DC power supplies in parallel,
In, for server master board power supply single DC power supply power mostly in 1000W or more, export electric current 100A with
On, so very big energy can be exported to server master board, if there are short-circuit conditions, location of short circuit meetings on server master board
It heats up quickly, so that server master board occurs continuing raised heat history, when heat arrival will cause mainboard to burn to a certain degree
It ruins, the safety of generic server and reliability is caused to reduce.
Therefore, how to provide a kind of scheme of solution above-mentioned technical problem is that those skilled in the art needs to solve at present
The problem of.
Summary of the invention
The object of the present invention is to provide a kind of thermal-shutdown circuit of server master board and generic servers, in server master
Plate be cut to when being in over-temperature condition two DC power supplies of server master board power supply for electricity output, guarantee server master
The energy source that plate does not catch fire further so that server master board be avoided to burn, and then improves the safety of generic server
And reliability.
In order to solve the above technical problems, the present invention provides a kind of thermal-shutdown circuits of server master board, including it is used for
Voltage adjusts temperature sensing circuit and power supply the control electricity of the temperature of metal-oxide-semiconductor position in VR route on detection service device mainboard
Road, in which:
The output end of the temperature sensing circuit is connect with the receiving end of the power control circuit, the power supply control electricity
The control terminal on road is connect with the enable end for two DC power supplies powered for the server master board respectively；
The power control circuit is used to cut off two direct current supplys when the temperature is greater than preset temperature threshold
Power supply for electricity output.
Preferably, the temperature sensing circuit include DC power supply, resistance and be set to the corresponding preset temperature of the metal-oxide-semiconductor
Thermistor in detection zone, in which:
The output end of the DC power supply is connect with the first end of the thermistor, the second end of the thermistor with
The first end of the resistance connects, output end of the common end as the temperature sensing circuit, the second termination of the resistance
Ground.
Preferably, the thermistor is specially negative tempperature coefficient thermistor.
Preferably, the resistance is specially Chip-R.
Preferably, the power control circuit is specially switching tube, and the control terminal of the switching tube is as the power supply control
The receiving end of circuit processed, control terminal of the first end of the switching tube as the power control circuit, the of the switching tube
Two ends ground connection；
The switching tube is used to itself disconnect when the temperature is not more than preset temperature threshold；When the temperature is greater than in advance
If itself is connected when temperature threshold, the level of the enable end of two DC power supplies is dragged down, it is described straight with cutting two
Flow power supply for electricity output.
Preferably, the switching tube is specially NMOS tube, control terminal of the grid of the NMOS tube as the switching tube,
First end of the drain electrode as the switching tube of the NMOS tube, the source electrode of the NMOS tube as the switching tube second
End.
Preferably, the preset temperature threshold is specially 100 DEG C.
In order to solve the above technical problems, the present invention also provides a kind of generic server, including any of the above-described kind of server
The thermal-shutdown circuit of mainboard.
The present invention provides a kind of thermal-shutdown circuits of server master board, including for VR line on detection service device mainboard
The temperature sensing circuit and power control circuit of the temperature of metal-oxide-semiconductor position in road, in which: the output end of temperature sensing circuit
It is connect with the receiving end of power control circuit, the control terminal of power control circuit is straight with power for server master board two respectively
Flow the enable end connection of power supply；Power control circuit is used to cut off two direct currents when temperature is greater than preset temperature threshold
Power supply for electricity output.
The application is in view of the metal-oxide-semiconductor on server master board in VR (Voltage regulation, voltage are adjusted) route
It is working frequency highest compared to other electronic components, heat accumulation is maximum, the electronic component damaged most easily occurs (i.e.
The electronic component that easily attractive mainboard is burnt), so metal-oxide-semiconductor institute is in place in the thermal-shutdown circuit detection VR route of the application
The temperature set, if the temperature is not more than preset temperature threshold, it is believed that metal-oxide-semiconductor is normal, server master board is in a safe condition, then not
Do protection act；If the temperature is greater than preset temperature threshold, it is believed that metal-oxide-semiconductor abnormal (leading to short-circuit conditions), server master
Plate is in over-temperature condition, then be cut to two DC power supplies of server master board power supply for electricity output, guarantee server
The energy source that mainboard does not catch fire further so that server master board be avoided to burn, and then improves the safety of generic server
Property and reliability.
The present invention also provides a kind of generic servers, with above-mentioned thermal-shutdown circuit beneficial effect having the same.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to institute in the prior art and embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of structural schematic diagram of the thermal-shutdown circuit of server master board provided by the invention；
Fig. 2 is the structural schematic diagram of the thermal-shutdown circuit of another server master board provided by the invention.
Specific embodiment
Core of the invention is to provide the thermal-shutdown circuit and generic server of a kind of server master board, in server master
Plate be cut to when being in over-temperature condition two DC power supplies of server master board power supply for electricity output, guarantee server master
The energy source that plate does not catch fire further so that server master board be avoided to burn, and then improves the safety of generic server
And reliability.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Fig. 1 is please referred to, Fig. 1 is a kind of structural schematic diagram of the thermal-shutdown circuit of server master board provided by the invention.
The thermal-shutdown circuit of the server master board includes: on detection service device mainboard in VR route where metal-oxide-semiconductor
The temperature sensing circuit 1 and power control circuit 2 of the temperature of position, in which:
The output end of temperature sensing circuit 1 is connect with the receiving end of power control circuit 2, the control of power control circuit 2
End is connect with the enable end for two DC power supplies powered for server master board respectively；
Power control circuit 2 is used to cut off the power supply of two DC power supplies when temperature is greater than preset temperature threshold
Output.
It should be noted that the default of the application sets in advance, it is only necessary to which setting is primary, unless according to practical feelings
Condition needs to modify, and does not otherwise need to reset.
Specifically, it finds by experience, what server master board often occurred burns abnormal conditions are as follows: VR line on server master board
In road (two DC power supplies for server master board power supply are mainboard CPU power supply after mainboard VR route makees voltage adjusting)
Metal-oxide-semiconductor occur short circuit, cause server master board to burn.Based on this, the application carries out simulated experiment to server master board: first right
Metal-oxide-semiconductor in mainboard VR route carries out aging applied voltage test, makes the reduction of its reliability；Then mainboard VR route is taken out and carries big electricity
Stream, running environment of the emulating server in the larger situation of business.It is found during simulated experiment: MOS in mainboard VR route
The temperature of pipe rises quickly, hence it is evident that higher than other electronic components on server master board, and heat history is obvious, works long hours
Metal-oxide-semiconductor, which is burnt, later causes server master board kindling (since metal-oxide-semiconductor both ends are separately connected 12V power supply and ground, so working as metal-oxide-semiconductor
It will lead to 12V power supply shorted to earth when occurring abnormal, so that sufficiently large electric current is exported from two DC power supplies to MOS
Short dot at pipe will cause to service so that server master board occurs continuing raised heat history when heat reaches a certain level
The kindling of device mainboard), it burns abnormal conditions and is reappeared.
Based on experience and simulated experiment as a result, the application considers that the metal-oxide-semiconductor in mainboard VR route is working frequency highest,
Heat accumulation is maximum, the electronic component that most easily occurs damaging (i.e. easily attractive mainboard burn electronic component), so this
Application increases thermal-shutdown circuit at the metal-oxide-semiconductor in mainboard VR route, causes 12V power supply short over the ground after avoiding metal-oxide-semiconductor exception
Road causes server master board to catch fire.
Specifically, the thermal-shutdown circuit of the application includes temperature sensing circuit 1 and power control circuit 2, and work is former
Reason are as follows: detect the temperature of metal-oxide-semiconductor position in mainboard VR route by temperature sensing circuit 1 first, and transmit it to power supply
Control circuit 2；Power control circuit 2 makes comparisons the temperature at metal-oxide-semiconductor with the temperature threshold being arranged in advance, if at metal-oxide-semiconductor
Temperature is not more than established temperature threshold value, it is believed that metal-oxide-semiconductor is normal, server master board is in a safe condition, then does not do protection act；If
Temperature at metal-oxide-semiconductor is greater than established temperature threshold value, it is believed that metal-oxide-semiconductor abnormal (leading to short-circuit conditions), server master board are in
Over-temperature condition, then be cut to server master board power supply two DC power supplies for electricity output, guarantee that server master board does not have
There is the energy source further to catch fire, so that server master board be avoided to burn.
The present invention provides a kind of thermal-shutdown circuits of server master board, including for VR line on detection service device mainboard
The temperature sensing circuit and power control circuit of the temperature of metal-oxide-semiconductor position in road, in which: the output end of temperature sensing circuit
It is connect with the receiving end of power control circuit, the control terminal of power control circuit is straight with power for server master board two respectively
Flow the enable end connection of power supply；Power control circuit is used to cut off two direct currents when temperature is greater than preset temperature threshold
Power supply for electricity output.
The application is work frequency in view of the metal-oxide-semiconductor on server master board in VR route is compared to other electronic components
Rate highest, heat accumulation is maximum, the electronic component damaged most easily occurs, so the thermal-shutdown circuit of the application detects VR line
The temperature of metal-oxide-semiconductor position in road, if the temperature is not more than preset temperature threshold, it is believed that metal-oxide-semiconductor is normal, at server master board
In safe condition, then protection act is not done；If the temperature is greater than preset temperature threshold, it is believed that at metal-oxide-semiconductor exception, server master board
In over-temperature condition, then be cut to two DC power supplies of server master board power supply for electricity output, guarantee server master board
The energy source not caught fire further, so that server master board be avoided to burn, and then improve generic server safety and
Reliability.
Referring to figure 2., Fig. 2 is the structural representation of the thermal-shutdown circuit of another server master board provided by the invention
Figure.
The thermal-shutdown circuit of the server master board is on the basis of the above embodiments:
As a kind of preferred embodiment, temperature sensing circuit 1 includes DC power supply, resistance R2 and corresponds to set on metal-oxide-semiconductor
Preset temperature detection zone in thermistor R1, in which:
The output end of DC power supply is connect with the first end of thermistor R1, and the second end of thermistor R1 is with resistance R2's
First end connection, output end of the common end as temperature sensing circuit 1, the second end ground connection of resistance R2.
Specifically, the temperature sensing circuit 1 of the application includes DC power supply (output voltage VCC), resistance R2 and temperature-sensitive electricity
It hinders R1 (thermistor R1 sensitivity is higher, and operating temperature range is wider, small in size, and stability is good, and overload capacity is strong), work
Principle an are as follows: temperature sensing area is arranged in the application in advance, and thermistor R1 can be preferably in the temperature sensing area
Sense metal-oxide-semiconductor in mainboard VR route temperature change (set-up mode can be with are as follows: drawn centered on metal-oxide-semiconductor radius be less than it is default
Thermistor R1 is set to the position in circle and close to metal-oxide-semiconductor by the circle of radius, and the temperature that thermistor R1 is detected is considered
Temperature at metal-oxide-semiconductor).Based on this, when the temperature of metal-oxide-semiconductor in mainboard VR route changes, the electricity at the both ends thermistor R1
Pressure changes therewith, then resistance R2 (conventional, electric-resistance) also changes to the partial pressure value of the output voltage of DC power supply.The application will
The voltage change at the both ends resistance R2 represents the temperature change of metal-oxide-semiconductor in mainboard VR route, to realize when the temperature of metal-oxide-semiconductor is greater than
Two DC power supplies of cutting for electricity output when established temperature threshold value.
As a kind of preferred embodiment, thermistor R1 is specially negative tempperature coefficient thermistor.
Specifically, the thermistor R1 of the application can select negative tempperature coefficient thermistor (temperature is higher, and resistance value is got over
It is small；Temperature is lower, and resistance value is bigger).As for the specific selection of thermistor R1, the application is not particularly limited herein, according to
Depending on actual conditions.
As a kind of preferred embodiment, resistance R2 is specially Chip-R.
Specifically, the resistance R2 (fixed resistance value) of the application can select Chip-R, humidity and high temperature, temperature coefficient
It is small, circuit space cost is saved, refines design more.As for the specific selection of resistance R2, the application is not done particularly herein
It limits.
As a kind of preferred embodiment, power control circuit 2 is specially switching tube Q, and the control terminal of switching tube Q is as electricity
The receiving end of source control circuit 2, control terminal of the first end of switching tube Q as power control circuit 2, the second end of switching tube Q
Ground connection；
Switching tube Q is used to itself disconnect when temperature is not more than preset temperature threshold；When temperature is greater than preset temperature threshold
Shi Zishen conducting, drags down the level of the enable end of two DC power supplies, defeated with the power supply for cutting off two DC power supplies
Out.
Specifically, the enabled end signal PS_ON of DC power supply is the control signal for controlling itself output, works as PS_ON
When for high level, DC power supply normally exports 12V；When PS_ON is low level, DC power supply is without output.It is based on
This, the power control circuit 2 of the application can select switching tube Q, and the first termination DC power supply of switching tube Q enables
End, the second end ground connection of switching tube Q.When switching tube Q is disconnected, DC power supply normally exports 12V, and PS_ON is high level；
When switching tube Q conducting, it is equivalent to the enable end ground connection of DC power supply, i.e. the level quilt of the enable end of DC power supply
Drag down (PS_ON is low level), thus cut off DC power supply for electricity output.
When the input voltage of the control terminal of known switching tube Q is less than conducting voltage, switching tube Q is disconnected；The control of switching tube Q
When the input voltage at end is not less than conducting voltage, switching tube Q conducting.To realize that the temperature when metal-oxide-semiconductor is greater than established temperature threshold value
When two DC power supplies of cutting for electricity output, the application should ensure that when the temperature of metal-oxide-semiconductor is greater than established temperature threshold value,
The output voltage control switching tube Q of temperature sensing circuit 1 is connected.
As a kind of preferred embodiment, switching tube Q is specially NMOS tube, control of the grid of NMOS tube as switching tube Q
End processed, first end of the drain electrode of NMOS tube as switching tube Q, second end of the source electrode of NMOS tube as switching tube Q.
Further, the switching tube Q of the application can select but be not limited only to NMOS tube, and the application is not done particularly herein
It limits.
As a kind of preferred embodiment, preset temperature threshold is specially 100 DEG C.
Specifically, generic server mainboard in normal operating conditions, the temperature of entire CPU power supply link 60 DEG C with
Under, the temperature of mainboard VR route institute overlay area can be made to increase rapidly when short circuit exception occurs.The application can be by temperature threshold
It is set as 100 DEG C, it may be assumed that when the temperature at the metal-oxide-semiconductor in mainboard VR route is lower than 100 DEG C, thermal-shutdown circuit will not make guarantor
Shield movement；When temperature at metal-oxide-semiconductor is higher than 100 DEG C, thermal-shutdown circuit can trigger protection, directly cutting DC power supply
Output.
Under the present embodiment, if the negative temperature coefficient thermistor power that resistance value is 10Kohm when thermistor R1 is 25 DEG C of room temperature
Resistance；Resistance R2 is the Chip-R of resistance value 500ohm；The output voltage of DC power supply is 5V；Then thermistor R1 and resistance R2 is logical
Cross 5V partial pressure control NMOS tube gate voltage values (conducting voltage of this NMOS tube be 1.7V, it may be assumed that when grid voltage is greater than or waits
When 1.7V, NMOS transistor conduction, PS_ON signal becomes low level；When grid voltage is lower than 1.7V, NMOS tube is disconnected, PS_ON
The unprotected line influence of signal).
Such as the corresponding relationship of resistance value and temperature that the following table 1 is thermistor R1:
Table 1
As it can be seen that (resistance value is thermistor R1 at this time when the temperature of thermistor R1 sensing reaches 100 DEG C
0.9788Kohm) with resistance R2 (resistance value 0.5Kohm), the grid voltage of NMOS is made to become 1.69V.The resistance value of thermistor R1
It can increase and reduce with temperature, the grid voltage of NMOS tube reduces with the resistance value of thermistor R1 and increased, and works as thermistor
When the temperature of R1 sensing is higher than 100 DEG C, the PS_ON signal of NMOS transistor conduction, DC power supply is pulled low, DC power supply
Without output, entire mainboard is thus protected not burn phenomenon from source.
The present invention also provides a kind of generic server, the thermal-shutdown circuit including any of the above-described kind of server master board.
The introduction of generic server provided by the present application please refers to the embodiment of above-mentioned thermal-shutdown circuit, and the application is herein
It repeats no more.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (8)
1. a kind of thermal-shutdown circuit of server master board, which is characterized in that including for voltage tune on detection service device mainboard
Save the temperature sensing circuit and power control circuit of the temperature of metal-oxide-semiconductor position in VR route, in which:
The output end of the temperature sensing circuit is connect with the receiving end of the power control circuit, the power control circuit
Control terminal is connect with the enable end for two DC power supplies powered for the server master board respectively；
The power control circuit is used to cut off two DC power supplies when the temperature is greater than preset temperature threshold
For electricity output.
2. the thermal-shutdown circuit of server master board as described in claim 1, which is characterized in that the temperature sensing circuit packet
Include DC power supply, resistance and the thermistor in the corresponding preset temperature detection zone of the metal-oxide-semiconductor, in which:
The output end of the DC power supply is connect with the first end of the thermistor, the second end of the thermistor with it is described
The first end of resistance connects, output end of the common end as the temperature sensing circuit, the second end ground connection of the resistance.
3. the thermal-shutdown circuit of server master board as claimed in claim 2, which is characterized in that the thermistor is specially
Negative tempperature coefficient thermistor.
4. the thermal-shutdown circuit of server master board as claimed in claim 3, which is characterized in that the resistance is specially patch
Resistance.
5. the thermal-shutdown circuit of server master board as claimed in claim 3, which is characterized in that the power control circuit tool
Body is switching tube, receiving end of the control terminal of the switching tube as the power control circuit, the first end of the switching tube
As the control terminal of the power control circuit, the second end of the switching tube is grounded；
The switching tube is used to itself disconnect when the temperature is not more than preset temperature threshold；When the temperature is greater than default temperature
Itself is connected when spending threshold value, drags down the level of the enable end of two DC power supplies, is supplied with two direct currents of cutting
Power supply for electricity output.
6. the thermal-shutdown circuit of server master board as claimed in claim 5, which is characterized in that the switching tube is specially
NMOS tube, control terminal of the grid of the NMOS tube as the switching tube, the drain electrode of the NMOS tube is as the switching tube
First end, second end of the source electrode of the NMOS tube as the switching tube.
7. the thermal-shutdown circuit of server master board as claimed in claim 6, which is characterized in that the preset temperature threshold tool
Body is 100 DEG C.
8. a kind of generic server, which is characterized in that the excess temperature including such as described in any item server master boards of claim 1-7
Protect circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811214898.7A CN109193562A (en) | 2018-10-18 | 2018-10-18 | A kind of thermal-shutdown circuit and generic server of server master board |
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| CN201811214898.7A CN109193562A (en) | 2018-10-18 | 2018-10-18 | A kind of thermal-shutdown circuit and generic server of server master board |
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| CN113325938A (en) * | 2021-05-28 | 2021-08-31 | 山东英信计算机技术有限公司 | Server power supply line short circuit positioning system, method and device |
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| CN110134570B (en) * | 2019-05-21 | 2023-01-10 | 苏州浪潮智能科技有限公司 | Server and shock protection device thereof |
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| CN112865016A (en) * | 2021-01-14 | 2021-05-28 | 深圳市智仁科技有限公司 | Mainboard protection circuit, method and terminal |
| CN112865016B (en) * | 2021-01-14 | 2021-11-30 | 深圳市智仁科技有限公司 | Mainboard protection circuit, method and terminal |
| CN113204470A (en) * | 2021-05-14 | 2021-08-03 | 山东英信计算机技术有限公司 | Server board card device, control method thereof and related components |
| CN113204470B (en) * | 2021-05-14 | 2022-12-16 | 山东英信计算机技术有限公司 | Server board card device, control method thereof and related components |
| CN113325938A (en) * | 2021-05-28 | 2021-08-31 | 山东英信计算机技术有限公司 | Server power supply line short circuit positioning system, method and device |
| CN113721747A (en) * | 2021-07-29 | 2021-11-30 | 苏州浪潮智能科技有限公司 | Server and board burning prevention circuit and method thereof |
| CN113721747B (en) * | 2021-07-29 | 2023-08-29 | 苏州浪潮智能科技有限公司 | Server and burn-in prevention circuit and method thereof |
| CN117293951A (en) * | 2023-09-06 | 2023-12-26 | 成都华储卡电新能源科技有限公司 | Heavy current protection method and device for discharge MOS tube, medium and electronic equipment |
| CN117826965A (en) * | 2024-03-05 | 2024-04-05 | 深圳市智仁科技有限公司 | Method, device, equipment and storage medium for protecting voltage of main board |
| CN117826965B (en) * | 2024-03-05 | 2024-06-11 | 深圳市智仁科技有限公司 | Method, device, equipment and storage medium for protecting voltage of main board |
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Application publication date: 20190111 |
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| RJ01 | Rejection of invention patent application after publication |