CN106849333A - A kind of electronic equipment power supply circuit - Google Patents
A kind of electronic equipment power supply circuit Download PDFInfo
- Publication number
- CN106849333A CN106849333A CN201710119240.7A CN201710119240A CN106849333A CN 106849333 A CN106849333 A CN 106849333A CN 201710119240 A CN201710119240 A CN 201710119240A CN 106849333 A CN106849333 A CN 106849333A
- Authority
- CN
- China
- Prior art keywords
- feeder ear
- power supply
- battery
- switch module
- end system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
-
- 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
Abstract
The present invention provides a kind of electronic equipment power supply circuit, including battery feeder ear, external power supply feeder ear and back-end system feeder ear, battery feeder ear is connected by battery power switch module with the back-end system feeder ear, external power supply feeder ear is connected by DC power switch module with back-end system feeder ear, and DC power switch module, battery power switch module are connected with switching circuit.The electronic device power supply circuit can be switched over according to the voltage change of battery feeder ear, external power supply feeder ear, electronic equipment is set to power to be powered with external power supply in battery and directly switch over, when electronic equipment is connected with external power supply, electronic equipment directly can be powered by external power supply, the charging rate of battery is not interfered with thus, saves the charging interval of battery.Also can guarantee that the electronic equipment normal power supply of back-end system and work in the case of without battery simultaneously.
Description
Technical field
The present invention relates to the power supply circuit of a kind of electronic equipment, more particularly to one kind can be by two kinds of battery and external power supply
The circuit that mode is powered.
Background technology
With the development and the improvement of people's living standards of science and technology, daily production and living of the various electronic equipments in people
In application it is more and more extensive.It is particularly hand-held in present electronic equipment（Consumption）In electronic equipment, battery power be must not
Can be less, battery is powered by power supply circuit electron equipment, drive electronics work.But battery is due to the beam of prior art
Tie up, battery life hampers handheld device always to be developed towards high performance direction, in order to ensure cruising time sometimes very
Can extremely have to sacrifice electronic equipment some performances.In order to solve the problems, such as battery durable, also have a kind of mode be exactly
Shorten the time that battery charges as far as possible, battery is quickly charged.
The battery of electronic equipment needs to be charged by charger, and the battery of many handheld devices is all not at this stage
Removably, need that directly charger is inserted on electronic equipment when charging and charged.Electronic equipment is in the process for charging
In, electronic equipment also can be in running order sometimes, and mobile phone is used such as in charging process.While charging in this case
Battery is as backend system work and consumption electric power, so the progress for charging will be slack-off, extend the charging interval of battery.
There is existing electronic equipment again, if there is cell damage, missing or dead battery again cannot charge at quite low temperatures
Situation, with power supply also cannot power supply to the device work, which increases the wind that the electronic equipment under emergency case cannot work
Danger.
The content of the invention
The shortcoming of prior art in view of the above, can be using battery and external it is an object of the invention to provide one kind
The circuit that power supply two ways is powered respectively.
In order to achieve the above objects and other related objects, the present invention provides a kind of electronic equipment power supply circuit, including battery
Feeder ear, external power supply feeder ear and back-end system feeder ear, the back-end system feeder ear are used for the rear end for electronic equipment
System power supply, the battery feeder ear is connected by battery power switch module with the back-end system feeder ear, described external
Power supply side is connected by DC power switch module with the back-end system feeder ear, the DC power switch module, battery
Power switch module is connected with switching circuit, and when the battery feeder ear is high level, the external power supply feeder ear is low
During level, the switching circuit turns on the battery power switch module, the DC power switch module cut-off, the battery
Feeder ear is turned on the back-end system feeder ear, and when the external power supply feeder ear is high level, the switching circuit makes institute
State the cut-off of battery power switch module, the DC power switch module conducting, the external power supply feeder ear and the rear end system
System feeder ear conducting.
Preferably, the DC power switch module is the first metal-oxide-semiconductor, the source electrode of first metal-oxide-semiconductor and the external electricity
Source feeder ear connection, the drain electrode of first metal-oxide-semiconductor and the back-end system feeder ear, the grid of first metal-oxide-semiconductor and institute
State switching circuit connection.
Preferably, the battery power switch module is the second metal-oxide-semiconductor, source electrode and the battery of second metal-oxide-semiconductor
Feeder ear is connected, the drain electrode of second metal-oxide-semiconductor and the back-end system feeder ear, the grid of second metal-oxide-semiconductor with it is described
Switching circuit is connected.
Preferably, the switching circuit includes the first triode and the second triode, the emitter stage of first triode
It is connected with the battery feeder ear, the emitter stage of first triode is connected by 3rd resistor with the grid of the second metal-oxide-semiconductor,
The grid of second metal-oxide-semiconductor passes through first by the 4th resistance eutral grounding after colelctor electrode, the base stage parallel connection of first triode
Resistance eutral grounding, the base stage of second triode is connected with the base stage of first triode, the current collection of second triode
Pole is connected with the grid of second resistance, the first metal-oxide-semiconductor, the other end ground connection of the second resistance, the hair of second triode
Emitter-base bandgap grading is connected with the back-end system feeder ear.
As described above, electronic device power supply circuit of the invention has the advantages that：The electronic device power supply circuit
Be provided with battery feeder ear, external power supply feeder ear, and respectively by battery power switch module, DC power switch module with it is rear
End system feeder ear is connected, while battery power switch module, the break-make of DC power switch modules are controlled by switching circuit, this
Sample can be switched over according to the voltage change of battery feeder ear, external power supply feeder ear, make electronic equipment battery power with
External power supply is powered and directly switch over, and when electronic equipment is connected with external power supply, electronic equipment can directly pass through external electricity
Source is powered, and the charging rate of battery is not interfered with thus, saves the charging interval of battery.Also can guarantee that electronics sets simultaneously
The standby normal power supply of back-end system and work in the case of without battery.
Brief description of the drawings
Fig. 1 is the square frame connection diagram of the embodiment of the present invention.
Fig. 2 is embodiment of the present invention switching circuit and battery power switch module, the connection signal of DC power switch modules
Figure.
Component label instructions
1st, battery power switch module；2nd, DC power switch module；3rd, switching circuit；Q1, the first metal-oxide-semiconductor；Q2, the one or three pole
Pipe；Q3, the second metal-oxide-semiconductor；Q4, the second triode；R1, first resistor；R2, second resistance；R3,3rd resistor；R4, the 4th electricity
Resistance.
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages of the invention and effect easily.
Refer to Fig. 1.It should be clear that structure, ratio, size depicted in this specification institute accompanying drawings etc., is only used to coordinate
Content disclosed in specification, so that those skilled in the art understands and reads, is not limited to the present invention enforceable
Qualifications, therefore do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size,
Do not influence under effect that can be generated of the invention and the purpose to be reached, all should still fall in disclosed technology contents
Obtain in the range of covering.Meanwhile, in this specification it is cited such as " on ", D score, "left", "right", " centre " and " one "
Term, be merely convenient to understanding for narration, and be not used to limit enforceable scope of the invention, the change of its relativeness or
Adjustment, under without essence change technology contents, when being also considered as enforceable category of the invention.
As shown in figure 1, the present invention provides a kind of electronic equipment power supply circuit, the power supply circuit includes two energization inputs
With a power supply output end, two energization inputs are respectively battery feeder ear BAT_IN, external power supply feeder ear DC_IN, electric
Pond feeder ear BAT_IN powers for battery, and external power supply feeder ear DC_IN powers for external power supply.After power supply output end is
End system feeder ear MIAN_PWR, back-end system feeder ear MIAN_PWR are used to be powered for the back-end system of electronic equipment.Battery
Feeder ear BAT_IN is connected by battery power switch module 1 with back-end system feeder ear MIAN_PWR, external power supply feeder ear
DC_IN is connected by DC power switch module 2 with back-end system feeder ear MIAN_PWR, and DC power switch module 1, battery is powered
Switch module 2 is connected with switching circuit 3, and switching circuit 3 can control DC power switch module 1, battery power switch module 2
Switch.
When battery feeder ear BAT_IN is high level, and external power supply feeder ear DC_IN is low level, i.e., electronic equipment is needed
When being powered by battery, switching circuit 3 can be turned on battery power switch module 1, and DC power switch module 2 is ended, now
Battery feeder ear BAT_IN and back-end system feeder ear MIAN_PWR is turned on, and can thus be powered by battery electron equipment.
When external power supply feeder ear DC_IN is high level, switching circuit 3 ends battery power switch module 1, DC power switch modules
2 conductings, external power supply feeder ear DC_IN and back-end system feeder ear MIAN_PWR is turned on, now regardless of whether there is battery to power,
Electronic equipment is powered by external power supply.
Used as a kind of specific embodiment, as shown in Fig. 2 DC power switch module 1 is the first metal-oxide-semiconductor Q1, battery is powered
Switch module is the second metal-oxide-semiconductor Q3.The source electrode of the first metal-oxide-semiconductor Q1 is connected with external power supply feeder ear DC_IN, the first metal-oxide-semiconductor Q1
Drain electrode and back-end system feeder ear MIAN_PWR, the grid of the first metal-oxide-semiconductor Q1 is connected with switching circuit 3.Second metal-oxide-semiconductor Q3's
Source electrode is connected with battery feeder ear BAT_IN, drain electrode and back-end system the feeder ear MIAN_PWR, the 2nd MOS of the second metal-oxide-semiconductor Q3
The grid of pipe Q3 is connected with switching circuit.Switching circuit 3 includes the first triode Q2 and the second triode Q4, the first triode Q2
Can be integrated in a chip with the second triode Q4.
The emitter stage of the first triode Q2 is connected with battery feeder ear BAT_IN, and the emitter stage of the first triode Q2 is by the
Three resistance R3 are connected with the grid of the second metal-oxide-semiconductor Q3, and the grid of the second metal-oxide-semiconductor Q3 is grounded by the 4th resistance R4, the one or three pole
It is grounded by first resistor R1 after colelctor electrode, the base stage parallel connection of pipe Q2, the base stage of the second triode Q4 is with the first triode Q2's
Base stage is connected, and the colelctor electrode of the second triode Q4 is connected with the grid of second resistance R2, the first metal-oxide-semiconductor Q1, second resistance R2's
The other end is grounded, and the emitter stage of the second triode Q4 is connected with back-end system feeder ear MIAN_PWR.
When being powered using battery, external power supply feeder ear DC_IN is 0, when battery feeder ear BAT_IN is high level, the
Two metal-oxide-semiconductor Q3 are turned on, and battery feeder ear BAT_IN to back-end system feeder ear MAIN_PWR conductings, the second triode chip Q4 leads
Logical, the first metal-oxide-semiconductor Q1 is cut off, and can thus be powered to the back-end system of electronic equipment by battery, while battery can be prevented
Voltage pour in down a chimney toward external power supply side DC_IN.When external power supply feeder ear DC_IN is high level, battery feeder ear BAT_
When IN is 0 or high level, the second metal-oxide-semiconductor Q3 is cut off, the first triode Q2 conductings, the second triode Q4 cut-offs, the first metal-oxide-semiconductor
Q1 is turned on, and external power supply feeder ear DC_IN and back-end system feeder ear MAIN_PWR can so turned on, thus can be by outer
Connect power supply to be powered to the back-end system of electronic equipment, without by battery.
The electronic device power supply circuit is provided with battery feeder ear, external power supply feeder ear, and is powered by battery respectively
Switch module, DC power switch module are connected with back-end system feeder ear, while controlling battery power switch by switching circuit
The break-make of module, DC power switch modules, can thus be carried out according to the voltage change of battery feeder ear, external power supply feeder ear
Switching, makes electronic equipment power to be powered with external power supply in battery and directly switch over, when electronic equipment is connected with external power supply
When, electronic equipment directly can be powered by external power supply, and the charging rate of battery is not interfered with thus, save battery
Charging interval.Also can guarantee that the electronic equipment normal power supply of back-end system and work in the case of without battery simultaneously.So,
The present invention effectively overcomes various shortcoming of the prior art and has high industrial utilization.
The above-described embodiments merely illustrate the principles and effects of the present invention, not for the limitation present invention.It is any ripe
The personage for knowing this technology all can carry out modifications and changes under without prejudice to spirit and scope of the invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete with institute under technological thought without departing from disclosed spirit such as
Into all equivalent modifications or change, should be covered by claim of the invention.
Claims (4)
1. a kind of electronic equipment power supply circuit, including battery feeder ear（BAT_IN）, external power supply feeder ear（DC_IN）And rear end
System power supply end（MIAN_PWR）, the back-end system feeder ear（MIAN_PWR）Supplied for the back-end system for electronic equipment
Electricity, it is characterised in that：The battery feeder ear（BAT_IN）By battery power switch module and the back-end system feeder ear
（MIAN_PWR）Connection, the external power supply feeder ear（DC_IN）Powered with the back-end system by DC power switch module
End（MIAN_PWR）Connection, the DC power switch module, battery power switch module are connected with switching circuit, when the electricity
Pond feeder ear（BAT_IN）It is high level, the external power supply feeder ear（DC_IN）During for low level, the switching circuit makes institute
State the conducting of battery power switch module, the DC power switch module cut-off, the battery feeder ear（BAT_IN）After described
End system feeder ear（MIAN_PWR）Conducting, when the external power supply feeder ear（DC_IN）It is high level, the switching circuit makes
The battery power switch module cut-off, the DC power switch module conducting, the external power supply feeder ear（DC_IN）With institute
State back-end system feeder ear（MIAN_PWR）Conducting.
2. electronic device power supply circuit according to claim 1, it is characterised in that：The DC power switch module is first
Metal-oxide-semiconductor（Q1）, first metal-oxide-semiconductor（Q1）Source electrode and the external power supply feeder ear（DC_IN）Connection, a MOS
Pipe（Q1）Drain electrode and the back-end system feeder ear（MIAN_PWR）, first metal-oxide-semiconductor（Q1）Grid and the switching
Circuit is connected.
3. electronic device power supply circuit according to claim 2, it is characterised in that：The battery power switch module is the
Two metal-oxide-semiconductors（Q3）, second metal-oxide-semiconductor（Q3）Source electrode and the battery feeder ear（BAT_IN）Connection, second metal-oxide-semiconductor
（Q3）Drain electrode and the back-end system feeder ear（MIAN_PWR）, second metal-oxide-semiconductor（Q3）Grid and it is described switching electricity
Road connects.
4. electronic device power supply circuit according to claim 3, it is characterised in that：The switching circuit includes the one or three pole
Pipe（Q2）With the second triode（Q4）, first triode（Q2）Emitter stage and the battery feeder ear（BAT_IN）Even
Connect, first triode（Q2）Emitter stage pass through 3rd resistor（R3）With the second metal-oxide-semiconductor（Q3）Grid connection, described the
Two metal-oxide-semiconductors（Q3）Grid pass through the 4th resistance（R4）Ground connection, first triode（Q2）Colelctor electrode, base stage parallel connection after lead to
Cross first resistor（R1）Ground connection, second triode（Q4）Base stage and first triode（Q2）Base stage connection, institute
State the second triode（Q4）Colelctor electrode and second resistance（R2）, the first metal-oxide-semiconductor（Q1）Grid connection, the second resistance
（R2）The other end ground connection, second triode（Q4）Emitter stage and the back-end system feeder ear（MIAN_PWR）Even
Connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710119240.7A CN106849333A (en) | 2017-03-02 | 2017-03-02 | A kind of electronic equipment power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710119240.7A CN106849333A (en) | 2017-03-02 | 2017-03-02 | A kind of electronic equipment power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106849333A true CN106849333A (en) | 2017-06-13 |
Family
ID=59138140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710119240.7A Pending CN106849333A (en) | 2017-03-02 | 2017-03-02 | A kind of electronic equipment power supply circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN106849333A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103746446A (en) * | 2013-12-20 | 2014-04-23 | 青岛歌尔声学科技有限公司 | Ceaseless power-supplying circuit and electronic product |
| US20160043595A1 (en) * | 2014-08-07 | 2016-02-11 | Kabushiki Kaisha Toshiba | Electronic device and method |
| CN206602403U (en) * | 2017-03-02 | 2017-10-31 | 江苏辰汉电子科技有限公司 | A kind of electronic equipment power supply circuit |
-
2017
- 2017-03-02 CN CN201710119240.7A patent/CN106849333A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103746446A (en) * | 2013-12-20 | 2014-04-23 | 青岛歌尔声学科技有限公司 | Ceaseless power-supplying circuit and electronic product |
| US20160043595A1 (en) * | 2014-08-07 | 2016-02-11 | Kabushiki Kaisha Toshiba | Electronic device and method |
| CN206602403U (en) * | 2017-03-02 | 2017-10-31 | 江苏辰汉电子科技有限公司 | A kind of electronic equipment power supply circuit |
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