CN109525033A - Power supply circuit, method and low-power projection device - Google Patents
Power supply circuit, method and low-power projection device Download PDFInfo
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- CN109525033A CN109525033A CN201811446318.7A CN201811446318A CN109525033A CN 109525033 A CN109525033 A CN 109525033A CN 201811446318 A CN201811446318 A CN 201811446318A CN 109525033 A CN109525033 A CN 109525033A
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- Prior art keywords
- power supply
- power
- switch element
- identification device
- voltage
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Power supply circuit, method and low-power projection device provided by the present application, by design comprising first switching element, second switch element, power supply identification device, power supply adaptor and supplying cell power supply circuit, the power supply identification device detection power supply adaptor whether external power supply.In the case where power supply adaptor external power supply, the power supply identification device controls the first switching element and second switch element, so that the power supply adaptor is power load power supply.When the power supply adaptor does not have the case where external power supply, the power supply identification device controls the first switching element and second switch element, so that the supplying cell is power load power supply.And the power supply circuit is used to the projection device of low-power, so that the low-power projection device is easy to carry, and then can be used at any time in a variety of occasions.
Description
Technical field
This application involves circuit design fields, set in particular to the projection of a kind of power supply circuit, method and low-power
It is standby.
Background technique
Traditional projection device haves the characteristics that volume is big, power consumption is high and not portable.Factors above makes projection device
Need to install in advance, and then need to carry out cutting installation site on the wall, installation process is quite cumbersome, and need professional person into
Row operation.Simultaneously for scene required for some interim meetings, the projection device of big power consumption seems lack scope for their abilities.Meanwhile
For some conference scenarios, since powerful projection device needs to provide power supply in real time, if because accidental cause causes
Have a power failure, meeting is caused to have to interrupt progress.
Summary of the invention
In order to overcome above-mentioned deficiency in the prior art, the application's is designed to provide a kind of power supply circuit, the confession
Circuit includes power supply identification device, first switching element, second switch element, power supply adaptor and supplying cell；
The first controlled end and power supply adaptor of the first switching element are electrically connected, and the of the first switching element
Two controlled ends and power load are electrically connected；
The first controlled end and supplying cell of the second switch element are electrically connected, and the second of the second switch element
Controlled end and the power load are electrically connected；
The power supply identification device respectively with the control terminal of the first switching element and the second switch element
Control terminal is electrically connected；
The power supply identification device is connected with the power supply adaptor, and the power supply adaptor is according to the power supply adaptor
State controlled by the first controlled end of the first controlled end of the first switching element and the second switch element
The on-off of the first switching element and second switch element.
Optionally, the power supply adaptor is preset with multiple optional output voltages, the power supply identification device and described
It is connected between power supply adaptor by voltage identification chip, the voltage identification chip output power load works normally required
Voltage value signal, the power supply adaptor are corresponding from the multiple optional output voltage selection according to the voltage value signal
Target voltage values.
Optionally, the preset voltage of the power supply adaptor includes 12V, 15V or 19V.Optionally, the voltage identification core
Piece is CYPD2122-24LQXI.
Optionally, connected between the first controlled end of the second switch element and the electricity consumption battery by boost module
It connects, the boost module also sets the power supply identification device connection；The power supply identification device is low in the supplying cell voltage
When preset voltage value, normal working voltage is provided for power load by controlling the boost module.
Optionally, the boost module is MP3910 chip.
Optionally, the power supply circuit further includes battery charging module, one end of the battery charging module and the electricity
Source adapter connection, the other end of the battery charging module are connected with the supplying cell, and the battery charging module is used for
When battery capacity is no more than preset value, the constant electric energy of electric current is provided for supplying cell charging, in the battery capacity
When greater than preset value, the constant electric energy of voltage is provided as supplying cell charging.
Optionally, the battery charging module is MPS26123 chip.
The another object of the application is to provide a kind of method of supplying power to, is applied to electronic equipment, and the electronic equipment includes
Power supply identification device, first switching element, second switch element, power supply adaptor and supplying cell；The first switching element
The first controlled end and power supply adaptor be electrically connected；The first controlled end and battery of the second switch element are electrically connected；
The power supply identification device is electric with the control terminal of the first switching element and the control terminal of the second switch element respectively
Property connection；The power supply identification device is connected with the power supply adaptor；
The state of the power supply adaptor is detected by the power supply identification device；
If the power supply adaptor exports normal operating voltage, the power supply identification device turns off the second switch
Element, and the first switching element is opened, so that the power supply adaptor is power load power supply；
If the power supply adaptor does not export normal operating voltage, the power supply identification device shutdown described first
Switch element, and the second switch element is opened, so that the supplying cell is power load power supply.
The another object of the application is to provide a kind of low-power projection device, including the power supply circuit, passes through institute
Power supply circuit is stated as low-power projection device power supply.
In terms of existing technologies, the application has the advantages that
Power supply circuit, method and low-power projection device provided by the present application include first switching element, the by design
The power supply circuit of two switch elements, power identification device, power supply adaptor and supplying cell, the power supply identification device detect institute
State power supply adaptor whether external power supply.In the case where power supply adaptor external power supply, the power supply identification device control
The first switching element and second switch element are made, so that the power supply adaptor is power load power supply.In the power supply
When adapter does not have the case where external power supply, the power supply identification device controls the first switching element and second switch member
Part, so that the supplying cell is power load power supply.And the power supply circuit is used to the projection device of low-power, make
It is easy to carry to obtain the low-power projection device, and then can be used at any time in a variety of occasions.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is power supply circuit construction figure provided by the embodiments of the present application；
Fig. 2 is power supply identification device structure chart provided by the embodiments of the present application；
Fig. 3 is charging circuit configuration figure provided by the embodiments of the present application；
Fig. 4 is method of supplying power to flow chart of steps provided by the embodiments of the present application.
Icon: 1401- first switching element；200- power supply adaptor；300- power load；1402- second switch element；
500- power supply identification device；600- supplying cell；140- switch element；130- processor；120- machine readable storage medium；
700- voltage identification chip；800- battery charging module.
Specific embodiment
To keep the purposes, technical schemes and advantages of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
In attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is
Some embodiments of the present application, instead of all the embodiments.The application being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiments herein provided in the accompanying drawings is not intended to limit below claimed
Scope of the present application, but be merely representative of the selected embodiment of the application.Based on the embodiment in the application, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model of the application protection
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present application, it should be noted that term " first ", " second ", " third " etc. are only used for distinguishing and retouch
It states, is not understood to indicate or imply relative importance.
In the description of the present application, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary
It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in this application.
It is being powered using external power supply and is being powered under both of these case using battery to solve power load 300, power supply
The problem of switching, needs to design a kind of power supply circuit.
Fig. 1 is please referred to, Fig. 1 is the power supply circuit construction figure that this Shen provides, and the power supply circuit includes power supply identification device
500, first switching element 1401, second switch element 1402, power supply adaptor 200 and supplying cell 600.
Optionally, the first controlled end and power supply adaptor 200 of the first switching element 1401 are electrically connected, and described the
The second controlled end and power load 300 of one switch element 1401 are electrically connected.The first of the second switch element 1402 by
It controls end and supplying cell 600 is electrically connected, 300 electricity of the second controlled end and the power load of the second switch element 1402
Property connection.The power supply identification device 500 respectively with the control terminal of the first switching element 1401 and the second switch
The control terminal of element 1402 is electrically connected.
The power supply identification device 500 and the power supply adaptor 200 connect, the inspection in real time of power supply identification device 500
The state of the power supply adaptor 200 is surveyed, and 1401 He of first switching element is controlled according to the state of the power adaptation
The on-off of second switch element 1402, and then realize and switch different power supplys in varied situations as the power load 300 confession
Electricity.
Optionally, in a kind of specific embodiment provided in this embodiment, the first switching element 1401 and institute
Stating second switch element 1402 is field-effect tube.The wherein source electrode of corresponding first field-effect tube of the first switching element 1401
It is connected with the power supply adaptor 200, the drain electrode of first field-effect tube and the power load 300 connect, and described the
The grid of one field-effect tube and the power supply identification device 500 connection.The second switch element 1402 corresponding second simultaneously
The source electrode of field-effect tube and the supplying cell 600 connect, and the drain electrode of second field-effect tube and the power load 300 connect
It connects, second field-effect tube and the power supply identification device 500 connection.The power supply identification device 500 passes through and the electricity
The conducting wire of source adaptation connection detects the state of the power supply adaptor 200, if detecting that the power supply adaptor 200 does not connect
External power supply, by the conducting wire output control level signal being connected with the second field-effect grid, so that second effect
Should pipe conducting so that supplying cell 600 powers to the power load 300.
Optionally, in another specific embodiment provided in this embodiment, 1401 He of first switching element
The second switch element 1402 is triode.The wherein collector of corresponding first triode of the first switching element 1401
It is connected with the power supply adaptor 200, emitter-base bandgap grading and the power load 300 connection of first triode, described first
The base stage of triode and the power supply identification device 500 connection.Corresponding two or three pole of the second switch element 1402 simultaneously
The source electrode of pipe and the supplying cell 600 connect, emitter-base bandgap grading and the power load 300 connection of second triode, described
Second triode and the power supply identification device 500 connection.The power supply identification device 500 with the power adaptation by connecting
Conducting wire detect the state of the power supply adaptor 200, if detecting that the power supply adaptor 200 does not connect external power supply,
Level signal is controlled by the conducting wire output being connected with the second field-effect base stage, so that second triode ON, into
And supplying cell 600 is powered to the power load 300.
500 structure chart of power supply identification device as shown in Figure 2, the power supply identification device 500 include processor 130 and machine
Device readable storage medium storing program for executing 120.
It is directly or indirectly electrically connected between the memory 120, processor 130 and switch element 140, to realize
The transmission or interaction of data.For example, these elements can realize electricity by one or more communication bus or signal wire between each other
Property connection.The processor 130 is used to execute the executable module stored in the memory 120, such as Switching power
Required software function module and computer program etc..
Wherein, the readable storage medium storing program for executing 120 may be, but not limited to, random access memory (Random Access
Memory, RAM), read-only memory (Read Only Memory, ROM), programmable read only memory (Programmable
Read-Only Memory, PROM), erasable read-only memory (Erasable Programmable Read-Only
Memory, EPROM), electricallyerasable ROM (EEROM) (Electric Erasable Programmable Read-Only
Memory, EEPROM) etc..Wherein, for storing program, the processor 130 is receiving told machine readable storage medium 120
To after executing instruction, described program is executed.
The processor 130 may be a kind of IC chip, the processing capacity with signal.Above-mentioned processor
130 can be general processor, including central processing unit (Central Processing Unit, CPU), network processing unit
(Network Processor, NP) etc.；It can also be digital signal processor (DSP), specific integrated circuit (ASIC), scene
Programmable gate array (FPGA) either other programmable logic device, discrete gate or transistor logic, discrete hardware group
Part.It may be implemented or execute disclosed each method, step and the logic diagram in the embodiment of the present application.General processor can be with
It is that microprocessor or the processor are also possible to any conventional processor etc..
Optionally, charging circuit configuration figure as shown in Figure 3, the power supply adaptor 200 are preset with multiple optional defeated
Voltage out, wherein in the present embodiment, the power supply adaptor 200 is USB PD (PD, power delivery) power adaptation
Device 200, the USB PD power supply adaptor 200 can provide multiple optionally output voltages.500 He of power supply identification device
It is connected between the power supply adaptor 200 by voltage identification chip 700, when the piezoelectric voltage identification chip 700 detects institute
When stating PD power supply adaptor 200 and access, the voltage identification chip 700 by based on the type C agreement in USB3.1 to institute
It states USB PD power supply adaptor 200 and exports the power load 300 and work normally required voltage value signal.The power supply
Adapter 200 selects corresponding target voltage values progress defeated according to the voltage value signal from the multiple optional output voltage
Out, wherein the exportable voltage of the USB PD power supply adaptor 200 includes 12V, 15V or 19V.In the present embodiment, described
Voltage identification chip 700 is the CYPD2122-24LQXI chip of Sai Pulasi (Cypress) company manufacture.
Optionally, pass through boosting between the first controlled end and the supplying cell 600 of the second switch element 1402
Module connection, the boost module are also connected with the power supply identification device 500.Since the supplying cell 600 is for a long time
Continued power for a period of time after, the phenomenon that supplying cell 600 will appear spread of voltage.The phenomenon will lead to described
300 cisco unity malfunction of power load.For this purpose, in the present embodiment, the power supply identification device 500 is detecting the power supply
When the voltage of battery 600 is lower than preset threshold, controlling the boost module is that the power load 300 provides stable work
Make voltage.In the present embodiment, the boost module is Xin Yuan System Co., Ltd (MPS, Monolithic Power
Systems MP3910 chip).
Optionally, while charging rate in order to accelerate the supplying cell 600, and the supplying cell 600 is protected.
In the present embodiment, the power supply circuit further includes battery charging module 800, one end of the battery charging module 800 and described
Power supply adaptor 200 connects, the other end and the supplying cell 600 connection of the battery charging module 800.The battery fills
For electric module 800 when the power supply adaptor 200 has external power supply, the supplying cell 600 passes through the power adaptation
Device 200 charges.When the battery charging module 800 detects that 600 electricity of supplying cell is no more than preset value, provide
The constant electric energy of electric current is that it is constant to provide voltage when the battery capacity is greater than preset value for the supplying cell 600 charging
Electric energy is the supplying cell 600 charging.In the present embodiment, the battery charging module 800 is MPS26123 chip.
The another object of the application is to provide a kind of method of supplying power to, as shown in figure 4, shown method is set applied to electronics
Standby, the electronic equipment includes power supply identification device 500, first switching element 1401, second switch element 1402, power adaptation
Device 200 and supplying cell 600；The first controlled end and power supply adaptor 200 of the first switching element 1401 are electrically connected；Institute
The first controlled end and battery for stating second switch element 1402 are electrically connected；The power supply identification device 500 is respectively with described
The control terminal of one switch element 1401 and the control terminal of the second switch element 1402 are electrically connected；The power supply identification dress
Set 500 and the connection of the power supply adaptor 200.
Step S100 detects the state of the power supply adaptor 200 by the power supply identification device 500.
Step S200, if the power supply adaptor 200 exports normal operating voltage, the power supply identification device 500
The second switch element 1402 is turned off, and opens the first switching element 1401, so that the power supply adaptor 200 is to use
Electric loading 300 is powered.
Step S300, if the power supply adaptor 200 does not export normal operating voltage, the power supply identification device
The 500 shutdown first switching elements 1401, and the second switch element 1402 is opened, so that the supplying cell 600 is
The power load 300 is powered.
The another object of the application is to provide a kind of low-power projection device, and the low-power projection device includes described
Power supply circuit.The low-power projection device simultaneously passes through the power supply circuit to obtain power supply.
In conclusion power supply circuit provided by the present application, method and low-power projection device, are opened by design comprising first
Close the power supply of element 1401, second switch element 1402, power identification device 500, power supply adaptor 200 and supplying cell 600
Circuit, the power supply identification device 500 detect the power supply adaptor 200 whether external power supply.In the power supply adaptor 200
When the case where external power supply, the power supply identification device 500 controls the first switching element 1401 and second switch element
1402, so that the power supply adaptor 200 is the power supply of power load 300.In the not no external power supply of the power supply adaptor 200
When situation, the power supply identification device 500 controls the first switching element 1401 and second switch element 1402, so that described
Supplying cell 600 is the power load 300 power supply.And the power supply circuit is used to the projection device of low-power, so that institute
It is easy to carry to state low-power projection device, and then can be used at any time in a variety of occasions.
In embodiment provided herein, it should be understood that disclosed device and method, it can also be by other
Mode realize.The apparatus embodiments described above are merely exemplary, for example, the flow chart and block diagram in attached drawing are shown
According to device, the architectural framework in the cards of method and computer program product, function of multiple embodiments of the application
And operation.In this regard, each box in flowchart or block diagram can represent one of a module, section or code
Point, a part of the module, section or code includes one or more for implementing the specified logical function executable
Instruction.It should also be noted that function marked in the box can also be attached to be different from some implementations as replacement
The sequence marked in figure occurs.For example, two continuous boxes can actually be basically executed in parallel, they sometimes may be used
To execute in the opposite order, this depends on the function involved.It is also noted that each of block diagram and or flow chart
The combination of box in box and block diagram and or flow chart can be based on the defined function of execution or the dedicated of movement
The system of hardware is realized, or can be realized using a combination of dedicated hardware and computer instructions.
In addition, each functional module in each embodiment of the application can integrate one independent portion of formation together
Point, it is also possible to modules individualism, an independent part can also be integrated to form with two or more modules.
It, can be with if the function is realized and when sold or used as an independent product in the form of software function module
It is stored in a computer readable storage medium.Based on this understanding, the technical solution of the application is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a
People's computer, server or network equipment etc.) execute each embodiment the method for the application all or part of the steps.
And storage medium above-mentioned includes: that USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
The various media that can store program code such as reservoir (RAM, Random Access Memory), magnetic or disk.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
The above, the only specific embodiment of the application, but the protection scope of the application is not limited thereto, it is any
Those familiar with the art within the technical scope of the present application, can easily think of the change or the replacement, and should all contain
Lid is within the scope of protection of this application.Therefore, the protection scope of the application shall be subject to the protection scope of the claim.
Claims (10)
1. a kind of power supply circuit, which is characterized in that the power supply circuit includes power supply identification device, first switching element, second
Switch element, power supply adaptor and supplying cell；
The first controlled end and power supply adaptor of the first switching element are electrically connected, the first switching element second by
It controls end and power load is electrically connected；
The first controlled end and supplying cell of the second switch element are electrically connected, and the second of the second switch element is controlled
End and the power load are electrically connected；
The power supply identification device control with the control terminal of the first switching element and the second switch element respectively
End is electrically connected；
The power supply identification device is connected with the power supply adaptor, and the power supply adaptor is according to the shape of the power supply adaptor
Described in the first controlled end control of the state by the first controlled end and the second switch element of the first switching element
The on-off of first switching element and second switch element.
2. power supply circuit according to claim 1, which is characterized in that the power supply adaptor is preset with multiple optional defeated
Voltage out is connected between the power supply identification device and the power supply adaptor by voltage identification chip, the voltage identification
Chip exports the voltage value signal needed for power load works normally, and the power supply adaptor is according to the voltage value signal from institute
It states multiple optional output voltages and selects corresponding target voltage values.
3. power supply circuit according to claim 2, which is characterized in that the preset voltage of power supply adaptor include 12V,
15V or 19V.
4. power supply circuit according to claim 2, which is characterized in that the voltage identification chip is CYPD2122-
24LQXI chip.
5. power supply circuit according to claim 1, which is characterized in that the first controlled end of the second switch element and institute
It states and is connected between supplying cell by boost module, the boost module is also connected with the power supply identification device；The power supply
Identification device is power load by controlling the boost module when supplying cell voltage is lower than preset voltage value
Normal working voltage is provided.
6. power supply circuit according to claim 5, which is characterized in that the boost module is MP3910 chip.
7. power supply circuit according to claim 1, which is characterized in that the power supply circuit further includes battery charging module,
One end of the battery charging module is connected with the power supply adaptor, the other end of the battery charging module and the power supply
Battery connection, the battery charging module are used to provide the constant electric energy of electric current when battery capacity is no more than preset value as institute
Supplying cell charging is stated, when the battery capacity is greater than preset value, providing the constant electric energy of voltage is that the supplying cell fills
Electricity.
8. power supply circuit according to claim 7, which is characterized in that the battery charging module is MPS26123 chip.
9. a kind of method of supplying power to, which is characterized in that be applied to electronic equipment, the electronic equipment includes power supply identification device, the
One switch element, second switch element, power supply adaptor and supplying cell；The first controlled end and electricity of the first switching element
Source adapter is electrically connected；The first controlled end and battery of the second switch element are electrically connected；The power supply identification device
It is electrically connected respectively with the control terminal of the first switching element and the control terminal of the second switch element；The power supply is known
Other device is connected with the power supply adaptor；
The state of the power supply adaptor is detected by the power supply identification device；
If the power supply adaptor exports normal operating voltage, the power supply identification device turns off the second switch member
Part, and the first switching element is opened, so that the power supply adaptor is power load power supply；
If the power supply adaptor does not export normal operating voltage, the power supply identification device turns off the first switch
Element, and the second switch element is opened, so that the supplying cell is power load power supply.
10. a kind of low-power projection device, which is characterized in that it include power supply circuit described in claim 1-8 any one,
It is low-power projection device power supply by the power supply circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811446318.7A CN109525033A (en) | 2018-11-29 | 2018-11-29 | Power supply circuit, method and low-power projection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811446318.7A CN109525033A (en) | 2018-11-29 | 2018-11-29 | Power supply circuit, method and low-power projection device |
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