CN207896734U - The automatic switch-over circuit of main power source and stand-by power supply is realized by detecting input voltage - Google Patents
The automatic switch-over circuit of main power source and stand-by power supply is realized by detecting input voltage Download PDFInfo
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- CN207896734U CN207896734U CN201820235641.9U CN201820235641U CN207896734U CN 207896734 U CN207896734 U CN 207896734U CN 201820235641 U CN201820235641 U CN 201820235641U CN 207896734 U CN207896734 U CN 207896734U
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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
Abstract
The utility model belongs to power supply switch circuit technical field, more particularly to the automatic switch-over circuit of main power source and stand-by power supply is realized by detecting input voltage, it is divided by the way that first resistor and second resistance is arranged, and using the voltage of second resistance as the input voltage of amplitude detection chip, judged according to the voltage of second resistance by amplitude detection chip and send out saltus step level to switch control unit, switch control unit controls first switch and the second switch according to saltus step level.The utility model without it is additional be that amplitude detection chip is arranged power supply again, the voltage of second resistance be both the supply voltage of amplitude detection chip simultaneously and detection voltage so that entire voltage detecting circuit is more simple；Also, based on the characteristic of amplitude detection chip, virtually a retarding window is provided for circuit so that circuit switching is more stablized in main power source and stand-by power supply handoff procedure.
Description
Technical field
The invention belongs to power supply switch circuit technical fields, more particularly to by detect input voltage realize main power source with it is standby
With the automatic switch-over circuit of power supply.
Background technology
Currently, the electronic equipment switching circuit used on the market is more, comparator composition voltage detecting is mostly used, output is logical
It crosses the switching of control semiconductor switch pipe or directly power supply is switched using diode forward on state characteristic, prevent output end from falling
It fills to input terminal, but since comparator needs additional power supply circuit, and circuit is complicated, comparator needs additional power supply, electricity
Road is of high cost.Emphasis of the present invention solves the problems, such as that comparator detection potential circuit is complicated, and voltage detecting circuit is simple, this circuit
Electric resistance partial pressure can power without additional power supply circuit, and simpler and included lag function, switching are used compared to comparator scheme
It is more stable.
Invention content
In view of the above problems, the present invention is intended to provide realizing the automatic of main power source and stand-by power supply by detecting input voltage
Switching circuit.
In order to solve the above technical problems, one aspect of the present invention is：It provides real by detecting input voltage
The automatic switch-over circuit of existing main power source and stand-by power supply, including：
First resistor and second resistance, the first resistor and second resistance are connected on main power source；
The first end and second end of amplitude detection chip, the amplitude detection chip is separately connected the first end of second resistance
And second end；
Switch control unit, the first end of the switch control unit are connect with the third end of the amplitude detection chip；
First switch, the first end of the first switch are connect with the second end of the switch control unit, and described first
The second end of switch is connect with the first end of the first resistor；
Second switch, the first end of the second switch are connect with the third end of the switch control unit, and described second
The third end of switch is connect with the third end of the first switch, and the second end of the second switch and the stand-by power supply are just
Pole connects.
Further, the second end of the first switch and third end are acted in the first control signal of switch control unit
Lower conducting, and disconnected under the second control signal of the switch control unit.
Further, the first switch switchs for main power path metal-oxide-semiconductor, the main power source access metal-oxide-semiconductor switch
First end, second end, third end be respectively metal-oxide-semiconductor grid, drain electrode and source electrode.
Further, the second end of the second switch and third end control signal function in the third of switch control unit
Lower conducting, and disconnected under the 4th control signal function of the switch control unit.
Further, the second switch is stand-by power supply channel selector, and the stand-by power supply channel selector has two
A metal-oxide-semiconductor switch, respectively the first metal-oxide-semiconductor switch and the second metal-oxide-semiconductor switch；The first metal-oxide-semiconductor switch and the 2nd MOS
The first end of pipe switch is connect with switch control unit third end, and the second end of the first metal-oxide-semiconductor switch is opened with first
The third end of pass connects, and the third end of the first metal-oxide-semiconductor switch is connect with the second end that second metal-oxide-semiconductor switchs, described
The third end of second metal-oxide-semiconductor switch is connect with the anode of the stand-by power supply；The first metal-oxide-semiconductor switch and the second metal-oxide-semiconductor are opened
First end, second end and the third end of pass are respectively grid, drain electrode and the source electrode of metal-oxide-semiconductor.
The present invention realizes the automatic switch-over circuit of main power source and stand-by power supply by detecting input voltage, passes through setting first
Resistance and second resistance are divided, and using the voltage of second resistance as the input voltage of amplitude detection chip, are examined by amplitude
Chip is surveyed to be judged according to the voltage of second resistance and send out saltus step level to switch control unit, switch control unit according to
Saltus step level controls first switch and the second switch.Power supply electricity is arranged for amplitude detection chip again without additional in the present invention
Source, the voltage of second resistance be both the supply voltage of amplitude detection chip simultaneously and detection voltage so that entire voltage detecting
Circuit is more simple；Also, based on the characteristic of amplitude detection chip, it is virtually in main power source and stand-by power supply handoff procedure
Circuit provides a retarding window so that circuit switching is more stablized.
Description of the drawings
Fig. 1 is the automatic switch-over circuit schematic diagram that main power source and stand-by power supply are realized by detecting input voltage.
Specific implementation mode
A kind of associated binocular image bus passenger flow of vehicle door status provided by the invention is illustrated below in conjunction with Fig. 1 to calculate
Method and apparatus.
As shown in Figure 1, the present invention provides through the automatic switchover electricity that detection input voltage realizes main power source and stand-by power supply
Road, including：
First resistor RLWith first resistor RX, the first resistor RLWith first resistor RXIt is connected on main power source；
The first end and second end of amplitude detection chip, the amplitude detection chip is separately connected first resistor RXFirst
End and second end；
Switch control unit, the first end of the switch control unit are connect with the third end of the amplitude detection chip；
First switch K1, the first end of the first switch K1 is connect with the second end of the switch control unit, described
The second end of first switch K1 and the first resistor RLFirst end connection；
Second switch K2, the first end of the second switch K2 is connect with the third end of the switch control unit, described
The third end of second switch K2 is connect with the third end of the first switch K1, the second end of the second switch K2 with it is described standby
With the anode connection of power supply.
Further, the second end of the first switch K1 and third end are made in the first control signal of switch control unit
With lower conducting, and disconnected under the second control signal of the switch control unit.
Further, the first switch K1 switchs for main power path metal-oxide-semiconductor, and the main power source access metal-oxide-semiconductor is opened
The first end of pass, second end, third end are respectively grid, drain electrode and the source electrode of metal-oxide-semiconductor.
Further, the second end of the second switch K2 and third end are made in the third control signal of switch control unit
With lower conducting, and disconnected under the 4th control signal function of the switch control unit.
Further, the second switch K2 is stand-by power supply channel selector, and the stand-by power supply channel selector has
Two metal-oxide-semiconductor switches, respectively the first metal-oxide-semiconductor switch Q1 and the second metal-oxide-semiconductor switch Q2；The first metal-oxide-semiconductor switch Q1 and institute
The first end for stating the second metal-oxide-semiconductor switch Q2 is connect with switch control unit third end, and the of the first metal-oxide-semiconductor switch Q1
Two ends are connect with the third end of first switch K1, the third end of the first metal-oxide-semiconductor switch Q1 and the second metal-oxide-semiconductor switch Q2
Second end connection, the third end of the second metal-oxide-semiconductor switch Q2 is connect with the positive of the stand-by power supply；First MOS
First end, second end and the third end of pipe switch Q1 and the second metal-oxide-semiconductor switch Q2 are respectively grid, drain electrode and the source electrode of metal-oxide-semiconductor.
Concrete principle is as follows：Amplitude detection chip is by detecting input voltage (i.e. first resistor RXVoltage), and thresholding
Threshold voltage exports saltus step level, realizes voltage detecting.Switch control unit by according to saltus step level control first switch K1 and
The break-make of second switch K2 is to realize the switching between power supply.
As the rising of input voltage voltage and VIN＞ VTHWhen, state switches to main power source by stand-by power supply power supply state and powers,
As voltage decline and VTL＞ VINWhen, state, to stand-by power supply power supply state, is just virtually in this way electricity by main power source power switching
Road provides a retarding window so that circuit switching is more stablized.Wherein VTHWith VTLCalculation formula is：
Note：VINFor externally fed input voltage；VHFor the Upper threshold of amplitude detection chip input, VLFor amplitude detection chip
The Lower Threshold of input；VTHTo reach the voltage threshold of switching point in externally fed input voltage from the bottom up change procedure
Value, VTLTo reach the voltage threshold of switching point in externally fed input voltage from top to bottom change procedure.
Main power source powers on logic：When detecting main power source power supply, main power source rises to VTHWhen above, amplitude detection chip
It detects that main power source inputs, sends out the first saltus step level VOD1, switch control unit sends out the first control according to the first saltus step level
Signal and the 4th control signal；The first control signal of the second end of the first switch K1 and third end in switch control unit
The lower conducting of effect；The second end of the second switch K2 and third end are broken under the 4th control signal function of switch control unit
It opens, main power source starts to power.
Stand-by power supply powers on logic：When main power source is down to V by normal power supplyTLWhen following, amplitude detection chip, which detects, is
Main power source of uniting powers off, and sends out the second saltus step level VOD2, switch control unit sends out second control signal according to the second saltus step level
Signal is controlled with third；The second end of the first switch K1 and third end are acted in the second control signal of switch control unit
Lower disconnection；The second end of the second switch K2 and third end are connected under the third control signal function of switch control unit,
Stand-by power supply starts to power.
The present invention realizes the automatic switch-over circuit of main power source and stand-by power supply by detecting input voltage, passes through setting first
Resistance and second resistance are divided, and using the voltage of second resistance as the input voltage of amplitude detection chip, are examined by amplitude
Chip is surveyed to be judged according to the voltage of second resistance and send out saltus step level to switch control unit, switch control unit according to
Saltus step level controls first switch and the second switch.Power supply electricity is arranged for amplitude detection chip again without additional in the present invention
Source, the voltage of second resistance be both the supply voltage of amplitude detection chip simultaneously and detection voltage so that entire voltage detecting
Circuit is more simple；Also, based on the characteristic of amplitude detection chip, it is virtually in main power source and stand-by power supply handoff procedure
Circuit provides a retarding window so that circuit switching is more stablized.
Mode the above is only the implementation of the present invention is not intended to limit the scope of the invention, every to utilize this
Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content, it is relevant to be applied directly or indirectly in other
Technical field is included within the scope of the present invention.
Claims (5)
1. realizing the automatic switch-over circuit of main power source and stand-by power supply by detecting input voltage, which is characterized in that including：
First resistor and second resistance, the first resistor and second resistance are connected on main power source；
The first end and second end of amplitude detection chip, the amplitude detection chip is separately connected the first end and of second resistance
Two ends；
Switch control unit, the first end of the switch control unit are connect with the third end of the amplitude detection chip；
First switch, the first end of the first switch are connect with the second end of the switch control unit, the first switch
Second end connect with the first end of the first resistor；
Second switch, the first end of the second switch are connect with the third end of the switch control unit, the second switch
Third end connect with the third end of the first switch, the anode of the second end of the second switch and the stand-by power supply is even
It connects.
2. the automatic switch-over circuit of main power source and stand-by power supply is realized by detecting input voltage as described in claim 1,
It being characterized in that, the second end of the first switch and third end are connected under the first control signal effect of switch control unit,
And it is disconnected under the second control signal of the switch control unit.
3. the automatic switch-over circuit of main power source and stand-by power supply is realized by detecting input voltage as claimed in claim 2,
It is characterized in that, the first switch is main power path metal-oxide-semiconductor switch, the first end of main power source access metal-oxide-semiconductor switch, the
Two ends, third end are respectively grid, drain electrode and the source electrode of metal-oxide-semiconductor.
4. the automatic switch-over circuit of main power source and stand-by power supply is realized by detecting input voltage as described in claim 1,
It being characterized in that, the second end of the second switch and third end are connected under the third control signal function of switch control unit,
And it is disconnected under the 4th control signal function of the switch control unit.
5. the automatic switch-over circuit of main power source and stand-by power supply is realized by detecting input voltage as claimed in claim 4,
It is characterized in that, the second switch is stand-by power supply channel selector, and the stand-by power supply channel selector tool is opened there are two metal-oxide-semiconductor
It closes, respectively the first metal-oxide-semiconductor switch and the second metal-oxide-semiconductor switch；What the first metal-oxide-semiconductor switch and second metal-oxide-semiconductor switched
First end is connect with switch control unit third end, the third of the second end and first switch of the first metal-oxide-semiconductor switch
The third end of end connection, the first metal-oxide-semiconductor switch is connect with the second end that second metal-oxide-semiconductor switchs, second metal-oxide-semiconductor
The third end of switch is connect with the anode of the stand-by power supply；The first of the first metal-oxide-semiconductor switch and the second metal-oxide-semiconductor switch
End, second end and third end are respectively grid, drain electrode and the source electrode of metal-oxide-semiconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820235641.9U CN207896734U (en) | 2018-02-09 | 2018-02-09 | The automatic switch-over circuit of main power source and stand-by power supply is realized by detecting input voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820235641.9U CN207896734U (en) | 2018-02-09 | 2018-02-09 | The automatic switch-over circuit of main power source and stand-by power supply is realized by detecting input voltage |
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| Publication Number | Publication Date |
|---|---|
| CN207896734U true CN207896734U (en) | 2018-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820235641.9U Active CN207896734U (en) | 2018-02-09 | 2018-02-09 | The automatic switch-over circuit of main power source and stand-by power supply is realized by detecting input voltage |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110768394A (en) * | 2019-10-31 | 2020-02-07 | 广州华凌制冷设备有限公司 | Remote controller and vehicle-mounted air conditioner |
| CN110797966A (en) * | 2019-10-25 | 2020-02-14 | 天津航空机电有限公司 | Redundant power supply circuit with hysteresis loop |
-
2018
- 2018-02-09 CN CN201820235641.9U patent/CN207896734U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110797966A (en) * | 2019-10-25 | 2020-02-14 | 天津航空机电有限公司 | Redundant power supply circuit with hysteresis loop |
| CN110768394A (en) * | 2019-10-31 | 2020-02-07 | 广州华凌制冷设备有限公司 | Remote controller and vehicle-mounted air conditioner |
| CN110768394B (en) * | 2019-10-31 | 2021-09-10 | 广州华凌制冷设备有限公司 | Remote controller and vehicle-mounted air conditioner |
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