CN110221673A - A kind of circuit to sparkle when notebook adapter being prevented to be inserted into and method - Google Patents
A kind of circuit to sparkle when notebook adapter being prevented to be inserted into and method Download PDFInfo
- Publication number
- CN110221673A CN110221673A CN201910516842.5A CN201910516842A CN110221673A CN 110221673 A CN110221673 A CN 110221673A CN 201910516842 A CN201910516842 A CN 201910516842A CN 110221673 A CN110221673 A CN 110221673A
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- Prior art keywords
- adapter
- direct current
- current outlet
- oxide
- metal
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The invention discloses it is a kind of prevent notebook adapter to be inserted into when the circuit that sparkles and method, the circuit include direct Current Outlet, first resistor, second resistance, 3rd resistor, the 4th resistance, the first metal-oxide-semiconductor, charging IC, the second metal-oxide-semiconductor and third metal-oxide-semiconductor；The terminal position of the direct Current Outlet is defined as the identification signal of adapter insertion, and only when adapter is fully inserted into, identification signal can just be connected to ground, and system can just recognize adapter and be fully inserted into and adapter be allowed to power to it.A kind of circuit to sparkle when notebook adapter being prevented to be inserted into provided by the invention and method, it can prevent laptop from causing to sparkle the problem of causing safety in the moment of insertion due to incomplete contact between or constructive interference etc. when being inserted into adapter, the person and property safety for ensuring user, promote the usage experience of user.
Description
Technical field
The present embodiments relate to emit when charging technique field more particularly to one kind prevent notebook adapter to be inserted into
The circuit and method of spark.
Background technique
Due to the rapid development of society, more and more people may require that more convenient and fast life style, and the development of network also makes
People office, amusement etc. be all not limited solely to some fixation position, this when portable convenient laptop
Become mainstream tool, similarly the safety problem of notebook is also increasingly paid attention to user experience.
Currently, general or DC Jack (direct Current Outlet) conventional adapter on the market, when laptop is being transported
During row when insertion DC Jack, insertion be not thorough or constructive interference etc. due to will lead to interface it is possible that
The plastic casing of spigot may be burnt or be melted to the phenomenon that sparkling when serious, the body that this can be very bad to client
It tests, it could even be possible to the human safety issues of user are brought hidden danger by the problems such as causing safety.
Summary of the invention
The present invention provides a kind of circuit to sparkle when notebook adapter being prevented to be inserted into and method, existing to solve
The deficiency of technology.
To achieve the above object, the present invention provides technical solution below:
In a first aspect, the embodiment of the present invention provides a kind of circuit to sparkle when notebook adapter being prevented to be inserted into,
It is arranged between adapter and system, including direct Current Outlet, first resistor, second resistance, 3rd resistor, the 4th resistance, the
One metal-oxide-semiconductor, charging IC, the second metal-oxide-semiconductor and third metal-oxide-semiconductor；
The socket of the direct Current Outlet is connect with adapter；
Described first resistor one end is connect with the power end of the direct Current Outlet, the other end and the direct Current Outlet
End is arranged to connect；
Described second resistance one end is connect with the setting end of the direct Current Outlet, other end ground connection；
Described 3rd resistor one end is connect with the power end of the direct Current Outlet, and the other end is with the charging IC's
The connection of ACDET signal detection end；
Described 4th resistance one end is connect with the ACDET signal detection end of the charging IC, other end ground connection；
The G foot of first metal-oxide-semiconductor is connect with the setting end of the direct Current Outlet, and the S foot of first metal-oxide-semiconductor connects
Ground, the D foot of first metal-oxide-semiconductor are connect with the ACDET signal detection end of the charging IC；
The D foot of second metal-oxide-semiconductor is connect with the power end of the direct Current Outlet, the S foot of second metal-oxide-semiconductor and institute
The S foot connection of third metal-oxide-semiconductor is stated, the G foot of second metal-oxide-semiconductor is connect with the control terminal of the charging IC；
The G foot of the third metal-oxide-semiconductor is connect with the control terminal of the charging IC, and the D foot and system of the third metal-oxide-semiconductor connect
It connects.
Further, the circuit to sparkle when notebook adapter being prevented to be inserted into, further includes the 5th resistance；
Described 5th resistance one end is connect with the G foot of the G foot of second metal-oxide-semiconductor and the third metal-oxide-semiconductor respectively, another
It holds and is connect with the control terminal of the charging IC.
Second aspect, the embodiment of the present invention provide a kind of method to sparkle when notebook adapter being prevented to be inserted into,
It is executed using the circuit to sparkle when preventing notebook adapter to be inserted into described in first aspect, which comprises
The terminal position of the direct Current Outlet is defined as to the identification signal of adapter insertion；
When the adapter is inserted into the socket of the direct Current Outlet, at the direct Current Outlet terminal position
The state of identification signal, identifies whether the adapter is fully inserted into the socket of the direct Current Outlet；
If recognizing the socket that the adapter is not fully inserted into the direct Current Outlet, the confession of the adapter is disconnected
Power path, the adapter can not give the system power supply；
If recognizing the socket that the adapter is fully inserted into the direct Current Outlet, it is closed the power supply of the adapter
Path, system power supply described in the adapter bio-occlusion.
Further, described to work as the adaptation in the method to sparkle when notebook adapter being prevented to be inserted into
When device is inserted into the socket of the direct Current Outlet, according to the state of the identification signal at the direct Current Outlet terminal position, know
The step of whether not described adapter is fully inserted into the socket of the direct Current Outlet include:
Identification when the adapter is inserted into the socket of the direct Current Outlet, at the direct Current Outlet terminal position
Signal is in unearthed state, then is identified as the socket that the adapter is not fully inserted into the direct Current Outlet；
Identification when the adapter is inserted into the socket of the direct Current Outlet, at the direct Current Outlet terminal position
Signal is in ground state, then is identified as the socket that the adapter is fully inserted into the direct Current Outlet.
Further, in the method to sparkle when notebook adapter being prevented to be inserted into, if described recognize institute
The socket that adapter is not fully inserted into the direct Current Outlet is stated, then disconnects the supply path of the adapter, the adapter
It can not give the step of the system power supply and include:
If recognizing the socket that the adapter is not fully inserted into the direct Current Outlet, the first resistor and second
Resistance divides the power end of the direct Current Outlet, and first metal-oxide-semiconductor is in the open state, the charging IC's
ACDET signal detection end detects that ACDET signal is low level, the control terminal of the charging IC control second metal-oxide-semiconductor and
Third metal-oxide-semiconductor is closed, so that the supply path of the adapter disconnects, the adapter can not give the system power supply.
Further, in the method to sparkle when notebook adapter being prevented to be inserted into, if described recognize institute
The socket that adapter is fully inserted into the direct Current Outlet is stated, then is closed the supply path of the adapter, the adapter is just
It often gives the step of the system power supply and includes:
If recognizing the socket that the adapter is fully inserted into the direct Current Outlet, the 3rd resistor and the 4th electricity
Resistance divides the power end of the direct Current Outlet, and first metal-oxide-semiconductor is in close state, the charging IC's
ACDET signal detection end detects that ACDET signal is high level, the control terminal of the charging IC control second metal-oxide-semiconductor and
Third metal-oxide-semiconductor is opened, so that the supply path of the adapter is closed, system power supply described in the adapter bio-occlusion.
A kind of circuit to sparkle when notebook adapter being prevented to be inserted into provided in an embodiment of the present invention and method, energy
Enough prevent laptop from leading to the wink in insertion due to incomplete contact between or constructive interference etc. when being inserted into adapter
Between sparkle the problem of causing safety, it is ensured that the person and property safety of user promotes the usage experience of user.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of circuit to sparkle when notebook adapter being prevented to be inserted into that the embodiment of the present invention one provides
Structural schematic diagram；
Fig. 2 is a kind of circuit to sparkle when notebook adapter being prevented to be inserted into that the embodiment of the present invention one provides
Structural schematic diagram；
Fig. 3 is a kind of method to sparkle when notebook adapter being prevented to be inserted into provided by Embodiment 2 of the present invention
Flow diagram；
Fig. 4 is a kind of method to sparkle when notebook adapter being prevented to be inserted into provided by Embodiment 2 of the present invention
Flow diagram.
Appended drawing reference:
Direct Current Outlet 10, first resistor 20, second resistance 30,3rd resistor 40, the 4th resistance 50, the first metal-oxide-semiconductor 60,
Charge IC70, the second metal-oxide-semiconductor 80, third metal-oxide-semiconductor 90.
Specific embodiment
To enable the purpose of the present invention, feature, advantage more obvious and understandable, implement below in conjunction with the present invention
Attached drawing in example, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that reality disclosed below
Applying example is only a part of the embodiment of the present invention, and not all embodiment.Based on the embodiments of the present invention, this field is common
Technical staff's all other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
In the description of the present invention, it is to be understood that, when a component is considered as " connection " another component, it can
To be directly to another component or may be simultaneously present the component being centrally located.When a component is considered as " setting
Set " another component, it, which can be, is set up directly on another component or may be simultaneously present the component being centrally located.
In addition, the indicating positions such as term " length " " short " "inner" "outside" or positional relationship for the orientation that is shown based on attached drawing or
Person's positional relationship is merely for convenience of the description present invention, rather than the device or original part of indication or suggestion meaning must have this
Specific orientation is operated with specific orientation construction, should not be understood as limitation of the invention with this.
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.
Embodiment one
Fig. 1~2 are please referred to, the embodiment of the present invention provides a kind of electricity to sparkle when notebook adapter being prevented to be inserted into
Road, be arranged between adapter and system, including direct Current Outlet 10, first resistor 20, second resistance 30,3rd resistor 40,
4th resistance 50, the first metal-oxide-semiconductor 60, charging IC70, the second metal-oxide-semiconductor 80 and third metal-oxide-semiconductor 90；
The socket of the direct Current Outlet 10 is connect with adapter；
Described 20 one end of first resistor is connect with the power end of the direct Current Outlet 10, the other end and the direct current electric mortiser
The setting end connection of seat 10；
Described 30 one end of second resistance is connect with the setting end of the direct Current Outlet 10, other end ground connection；
Described 40 one end of 3rd resistor is connect with the power end of the direct Current Outlet 10, the other end and the charging IC70
ACDET signal detection end connection；
Described 4th resistance, 50 one end is connect with the ACDET signal detection end of the charging IC70, other end ground connection；
The G foot of first metal-oxide-semiconductor 60 is connect with the setting end of the direct Current Outlet 10, the S of first metal-oxide-semiconductor 60
Foot ground connection, the D foot of first metal-oxide-semiconductor 60 are connect with the ACDET signal detection end of the charging IC70；
The D foot of second metal-oxide-semiconductor 80 is connect with the power end of the direct Current Outlet 10, the S of second metal-oxide-semiconductor 80
Foot is connect with the S foot of the third metal-oxide-semiconductor 90, and the G foot of second metal-oxide-semiconductor 80 is connect with the control terminal of the charging IC70；
The G foot of the third metal-oxide-semiconductor 90 with it is described charging IC70 control terminal connect, the D foot of the third metal-oxide-semiconductor 90 and
System connection.
Preferably, the circuit further includes the 5th resistance；Described 5th resistance one end respectively with second metal-oxide-semiconductor 80
G foot is connected with the G foot of the third metal-oxide-semiconductor 90, and the other end is connect with the control terminal of the charging IC70.
It should be noted that the terminal position of direct Current Outlet 10 (DC Jack) is defined as being adapted to by the embodiment of the present invention
The identification signal ADP_ID# of device insertion, only when adapter is fully inserted into, ADP_ID# signal can just be contacted with GND, and system is
Adapter can be recognized to be fully inserted into, to open the supply path of adapter, adapter is allowed to power to it.Due to being pure hard
Part control, reaction speed quickly, can be avoided the time difference and the phenomenon that function does not work occur.
The circuit of the embodiment of the present invention is controlled using multilayer logic, all linked with one another, and mistake is arranged in any one link
It cannot all achieve the effect that requirement, but it is understood that, for different actual demands and application scenarios, material choosing therein
Type can be adjusted.
A kind of circuit to sparkle when notebook adapter being prevented to be inserted into provided in an embodiment of the present invention, can prevent
Laptop causes to burn with anger in the moment of insertion due to incomplete contact between or constructive interference etc. when being inserted into adapter
Flower causes the problem of safety, it is ensured that the person and property safety of user promotes the usage experience of user.
Embodiment two
Referring to FIG. 3, second embodiment of the present invention provides it is a kind of prevent notebook adapter to be inserted into when the side that sparkles
Method is executed using the circuit to sparkle when preventing notebook adapter to be inserted into described in embodiment one, which comprises
S101, the identification signal that the terminal position of the direct Current Outlet is defined as to adapter insertion.
S102, when the adapter is inserted into the socket of the direct Current Outlet, according to direct Current Outlet end position
The state for setting the identification signal at place, identifies whether the adapter is fully inserted into the socket of the direct Current Outlet；If knowing
It is clipped to the socket that the adapter is not fully inserted into the direct Current Outlet, thens follow the steps S103, if recognizing the adaptation
Device is fully inserted into the socket of the direct Current Outlet, thens follow the steps S104.
S103, the supply path for disconnecting the adapter, the adapter can not give the system power supply.
The supply path of S104, the closure adapter, system power supply described in the adapter bio-occlusion.
It should be noted that the disconnection of the supply path of the adapter and closure actually refer to second described in circuit
The closing and opening of metal-oxide-semiconductor and third metal-oxide-semiconductor.
Referring to FIG. 4, on the basis of Fig. 3, method provided in an embodiment of the present invention specifically:
S201, the identification signal that the terminal position of the direct Current Outlet is defined as to adapter insertion.
S202, when the adapter is inserted into the socket of the direct Current Outlet, at the direct Current Outlet terminal position
The identification signal be in unearthed state, then be identified as the adapter be not fully inserted into the direct Current Outlet insert
Mouthful.
S203, the first resistor and second resistance divide the power end of the direct Current Outlet, and described first
Metal-oxide-semiconductor is in the open state, and the ACDET signal detection end of the charging IC detects that ACDET signal is low level, the charging
The control terminal of IC controls second metal-oxide-semiconductor and third metal-oxide-semiconductor is closed, so that the supply path of the adapter disconnects,
The adapter can not give the system power supply.
S204, when the adapter is inserted into the socket of the direct Current Outlet, at the direct Current Outlet terminal position
The identification signal be in ground state, then be identified as the socket that the adapter is fully inserted into the direct Current Outlet.
S205, the 3rd resistor and the 4th resistance divide the power end of the direct Current Outlet, and described first
Metal-oxide-semiconductor is in close state, and the ACDET signal detection end of the charging IC detects that ACDET signal is high level, the charging
The control terminal of IC controls second metal-oxide-semiconductor and third metal-oxide-semiconductor is opened, so that the supply path of the adapter is closed,
System power supply described in the adapter bio-occlusion.
A kind of method to sparkle when notebook adapter being prevented to be inserted into provided in an embodiment of the present invention, can prevent
Laptop causes to burn with anger in the moment of insertion due to incomplete contact between or constructive interference etc. when being inserted into adapter
Flower causes the problem of safety, it is ensured that the person and property safety of user promotes the usage experience of user.
So far, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although referring to aforementioned reality
Applying example, invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each
Technical solution documented by embodiment is modified or equivalent replacement of some of the technical features；And these are modified
Or replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (6)
1. a kind of circuit to sparkle when notebook adapter being prevented to be inserted into, is arranged between adapter and system, special
Sign is, including direct Current Outlet, first resistor, second resistance, 3rd resistor, the 4th resistance, the first metal-oxide-semiconductor, charging IC, the
Two metal-oxide-semiconductors and third metal-oxide-semiconductor；
The socket of the direct Current Outlet is connect with adapter；
Described first resistor one end is connect with the power end of the direct Current Outlet, the setting of the other end and the direct Current Outlet
End connection；
Described second resistance one end is connect with the setting end of the direct Current Outlet, other end ground connection；
Described 3rd resistor one end is connect with the power end of the direct Current Outlet, and the ACDET of the other end and the charging IC believe
The connection of number test side；
Described 4th resistance one end is connect with the ACDET signal detection end of the charging IC, other end ground connection；
The G foot of first metal-oxide-semiconductor is connect with the setting end of the direct Current Outlet, the S foot ground connection of first metal-oxide-semiconductor, institute
The D foot for stating the first metal-oxide-semiconductor is connect with the ACDET signal detection end of the charging IC；
The D foot of second metal-oxide-semiconductor is connect with the power end of the direct Current Outlet, the S foot of second metal-oxide-semiconductor and described the
The S foot of three metal-oxide-semiconductors connects, and the G foot of second metal-oxide-semiconductor is connect with the control terminal of the charging IC；
The G foot of the third metal-oxide-semiconductor is connect with the control terminal of the charging IC, and the D foot of the third metal-oxide-semiconductor is connect with system.
2. the circuit according to claim 1 to sparkle when notebook adapter being prevented to be inserted into, which is characterized in that also
Including the 5th resistance；
Described 5th resistance one end is connect with the G foot of the G foot of second metal-oxide-semiconductor and the third metal-oxide-semiconductor respectively, the other end with
The control terminal connection of the charging IC.
3. a kind of method to sparkle when notebook adapter being prevented to be inserted into, described in any item using claim 1~2
The circuit to sparkle when notebook adapter being prevented to be inserted into executes, which is characterized in that the described method includes:
The terminal position of the direct Current Outlet is defined as to the identification signal of adapter insertion；
When the adapter is inserted into the socket of the direct Current Outlet, according at the direct Current Outlet terminal position
The state of identification signal, identifies whether the adapter is fully inserted into the socket of the direct Current Outlet；
If recognizing the socket that the adapter is not fully inserted into the direct Current Outlet, disconnect the adapter for circuit
Diameter, the adapter can not give the system power supply；
If recognizing the socket that the adapter is fully inserted into the direct Current Outlet, be closed the adapter for circuit
Diameter, system power supply described in the adapter bio-occlusion.
4. the method according to claim 3 to sparkle when notebook adapter being prevented to be inserted into, which is characterized in that institute
It states when the adapter is inserted into the socket of the direct Current Outlet, according to the knowledge at the direct Current Outlet terminal position
The state of level signal identifies that the step of whether adapter is fully inserted into the socket of the direct Current Outlet includes:
The identification when the adapter is inserted into the socket of the direct Current Outlet, at the direct Current Outlet terminal position
Signal is in unearthed state, then is identified as the socket that the adapter is not fully inserted into the direct Current Outlet；
The identification when the adapter is inserted into the socket of the direct Current Outlet, at the direct Current Outlet terminal position
Signal is in ground state, then is identified as the socket that the adapter is fully inserted into the direct Current Outlet.
5. the method according to claim 4 to sparkle when notebook adapter being prevented to be inserted into, which is characterized in that institute
Recognize the socket that the adapter is not fully inserted into the direct Current Outlet if stating, disconnect the adapter for circuit
Diameter, the adapter, which can not be given the step of the system power supply, includes:
If recognizing the socket that the adapter is not fully inserted into the direct Current Outlet, the first resistor and second resistance
The power end of the direct Current Outlet is divided, first metal-oxide-semiconductor is in the open state, the ACDET of the charging IC
Signal detection end detects that ACDET signal is low level, and the control terminal of the charging IC controls second metal-oxide-semiconductor and third
Metal-oxide-semiconductor is closed, so that the supply path of the adapter disconnects, the adapter can not give the system power supply.
6. the method according to claim 4 to sparkle when notebook adapter being prevented to be inserted into, which is characterized in that institute
The socket that the adapter is fully inserted into the direct Current Outlet is recognized if stating, is closed the supply path of the adapter,
The step of system power supply described in the adapter bio-occlusion includes:
If recognizing the socket that the adapter is fully inserted into the direct Current Outlet, the 3rd resistor and the 4th resistance pair
The power end of the direct Current Outlet is divided, and first metal-oxide-semiconductor is in close state, the ACDET letter of the charging IC
Number test side detects that ACDET signal is high level, and the control terminal of the charging IC controls second metal-oxide-semiconductor and the 3rd MOS
Pipe is opened, so that the supply path of the adapter is closed, system power supply described in the adapter bio-occlusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910516842.5A CN110221673B (en) | 2019-06-14 | 2019-06-14 | Circuit and method for preventing spark during insertion of notebook computer adapter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910516842.5A CN110221673B (en) | 2019-06-14 | 2019-06-14 | Circuit and method for preventing spark during insertion of notebook computer adapter |
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| Publication Number | Publication Date |
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| CN110221673A true CN110221673A (en) | 2019-09-10 |
| CN110221673B CN110221673B (en) | 2023-04-25 |
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| CN201910516842.5A Active CN110221673B (en) | 2019-06-14 | 2019-06-14 | Circuit and method for preventing spark during insertion of notebook computer adapter |
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| CN203027229U (en) * | 2013-01-15 | 2013-06-26 | 杭州爱纬斯电子有限公司 | Power switch circuit for preventing electric spark |
| CN104810685A (en) * | 2014-01-23 | 2015-07-29 | 北京维森科技有限公司 | Method, socket and system used for guaranteeing safe power supply |
| CN204720708U (en) * | 2015-07-03 | 2015-10-21 | 成都比善科技开发有限公司 | A kind of Intelligent safety socket |
| CN206498198U (en) * | 2016-11-25 | 2017-09-15 | 比亚迪精密制造有限公司 | A kind of digital card electric supply installation and mobile terminal |
| CN106451400A (en) * | 2016-11-28 | 2017-02-22 | 深圳天珑无线科技有限公司 | Protection circuit and power supply method |
| CN107612571A (en) * | 2017-08-14 | 2018-01-19 | 深圳天珑无线科技有限公司 | Terminal and its control circuit of multipurpose Kato, prevent SIM card from burning the method for card |
| CN107340846A (en) * | 2017-08-31 | 2017-11-10 | 广东虹勤通讯技术有限公司 | The logic circuit and notebook computer of a kind of power down preventing |
| CN208257380U (en) * | 2018-04-28 | 2018-12-18 | 东莞市龙健电子有限公司 | A kind of output protection circuit of Music centre loudspeaker |
| CN109066164A (en) * | 2018-08-02 | 2018-12-21 | 苏州艾可珐电子科技有限公司 | A kind of parallel contact formula notebook DC power source adapter |
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