CN206712540U - The control circuit of dual power supply power switch path, chip - Google Patents
The control circuit of dual power supply power switch path, chip Download PDFInfo
- Publication number
- CN206712540U CN206712540U CN201720584869.4U CN201720584869U CN206712540U CN 206712540 U CN206712540 U CN 206712540U CN 201720584869 U CN201720584869 U CN 201720584869U CN 206712540 U CN206712540 U CN 206712540U
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- Prior art keywords
- power supply
- circuit
- stand
- pmos
- power source
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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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a kind of control circuit of dual power supply power switch path, chip, belong to technical field of integrated circuits.The control circuit includes charging circuit, detection circuit and switching circuit；One end connection main power source of the charging circuit, the other end connection stand-by power supply of the charging circuit, charges for the main power source to the stand-by power supply；The input of the detection circuit is connected with the main power source and the stand-by power supply respectively, the output end of the detection circuit is connected with the switching circuit, the detection circuit is used for the magnitude of voltage for detecting the main power source and the stand-by power supply, and detection signal corresponding with the magnitude of voltage is exported to the switching circuit；The switching circuit is connected with the charging circuit.The utility model realizes by carrying out real-time sampling and judgement to the voltage of main power source and stand-by power supply and carries out Charge Management and protection to stand-by power supply.
Description
Technical field
It the utility model is related to technical field of integrated circuits, more particularly to a kind of control electricity of dual power supply power switch path
Road, chip.
Background technology
In a chip design, the situation of dual power supply is run into sometimes, in this case, is cut for dual power supply
The situation with interleaved power is changed, it is necessary to be controlled to power flow, in some mode of operations (such as overshoot pattern, protection mould
Formula or power-down mode etc.) under, it is necessary to close power flow, and the two power supplies is reliably closed, prevent double
Occurs the situation of reverse power transmission between power supply.
However, existing control circuit only realizes that dual power supply selects, the charge and discharge control to stand-by power supply can not be realized
And protection.
Utility model content
In order to solve problem of the prior art, the utility model embodiment provides a kind of dual power supply power switch path
Control circuit, chip.The technical scheme is as follows：
On the one hand, there is provided a kind of control circuit of dual power supply power switch path, including charging circuit, detection circuit with
And switching circuit；
One end connection main power source of the charging circuit, the other end connection stand-by power supply of the charging circuit, for institute
Main power source is stated to charge to the stand-by power supply；
The input of the detection circuit is connected with the main power source and the stand-by power supply respectively, the detection circuit
Output end is connected with the switching circuit, and the detection circuit is used for the voltage for detecting the main power source and the stand-by power supply
Value, and detection signal corresponding with the magnitude of voltage is exported to the switching circuit；
The switching circuit is connected with the charging circuit, for being carried out according to the detection signal to the charging circuit
It is turned on or off.
Further, the charging circuit includes the first PMOS, and the first PMOS parasitism has diode.
Further, the detection circuit includes comparator, and the input of the comparator meets the main power source, institute respectively
Stand-by power supply and reference voltage are stated, the output end of the comparator exports the detection signal to the switching circuit.
Further, the switching circuit includes the first NMOS tube, the second PMOS, first NMOS tube and described the
The grid of two PMOSs accesses the detection signal, the drain electrode of first NMOS tube and second PMOS and described first
The grid connection of PMOS.
Further, the main power source is dc source.
On the other hand, there is provided a kind of chip, include the control circuit of dual power supply power switch path, the dual power supply work(
The control circuit of rate switch ways includes charging circuit, detection circuit and switching circuit；
One end connection main power source of the charging circuit, the other end connection stand-by power supply of the charging circuit, for institute
Main power source is stated to charge to the stand-by power supply；
The input of the detection circuit is connected with the main power source and the stand-by power supply respectively, the detection circuit
Output end is connected with the switching circuit, and the detection circuit is used for the voltage for detecting the main power source and the stand-by power supply
Value, and detection signal corresponding with the magnitude of voltage is exported to the switching circuit；
The switching circuit is connected with the charging circuit, for being carried out according to the detection signal to the charging circuit
It is turned on or off.
Further, the charging circuit includes the first PMOS, and the first PMOS parasitism has diode.
Further, the detection circuit includes comparator, and the input of the comparator meets the main power source, institute respectively
Stand-by power supply and reference voltage are stated, the output end of the comparator exports the detection signal to the switching circuit.
Further, the switching circuit includes the first NMOS tube, the second PMOS, first NMOS tube and described the
The grid of two PMOSs accesses the detection signal, the drain electrode of first NMOS tube and second PMOS and described first
The grid connection of PMOS.
Further, the main power source is dc source.
The beneficial effect brought of technical scheme that the utility model embodiment provides is：
By carrying out real-time sampling and judgement to the voltage of main power source and stand-by power supply, realize when stand-by power supply electricity not
Charged automatically to stand-by power supply when sufficient, charging is automatically stopped after emergency power supply is full of；Realize and stand-by power supply is entered
Row Charge Management and the function of protection；When mains power failure, stand-by power supply is enabled automatically, and due to the barrier of PMOS,
Stand-by power supply is avoided to main power source progress electric current to pour in down a chimney.Meanwhile it is also simple with circuit structure, reliability is high, is quick on the draw,
The advantages of precision is high.
Brief description of the drawings
, below will be to needed for embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
The accompanying drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some realities of the present utility model
Example is applied, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is a kind of control circuit schematic diagram for dual power supply power switch path that the utility model embodiment one provides；
Fig. 2 is a kind of electric operation control circuit figure for dual power supply power switch path that the utility model embodiment one provides；
Fig. 3 is a kind of detection circuit diagram that the utility model embodiment one provides；
Fig. 4 is the electric operation control circuit figure for another dual power supply power switch path that the utility model embodiment one provides；
Fig. 5 is a kind of chip schematic diagram that the utility model embodiment two provides.
Embodiment
It is new to this practicality below in conjunction with accompanying drawing to make the purpose of this utility model, technical scheme and advantage clearer
Type embodiment is described in further detail.
Embodiment one
The utility model embodiment provides a kind of control circuit of dual power supply power switch path, referring to Fig. 1, including fills
Circuit 101, detection circuit 102 and switching circuit 103；
One end connection main power source of the charging circuit 101, the other end connection stand-by power supply of the charging circuit 101,
The stand-by power supply is charged for the main power source；
The input of the detection circuit 102 is connected with the main power source and the stand-by power supply respectively, the detection electricity
The output end on road 102 is connected with the switching circuit 103, and the detection circuit 102 is used to detect the main power source and described standby
With the magnitude of voltage of power supply, and detection signal corresponding with the magnitude of voltage is exported to the switching circuit 103；
The switching circuit 103 is connected with the charging circuit 101, for electric to the charging according to the detection signal
Road 101 is turned on or off.
In the present embodiment, the main power source is dc source.Specifically, main power source can be alternating voltage by becoming
Dc source after pressure, or the dc source such as battery.For stand-by power supply, stand-by power supply is similarly dc source,
Such as lithium battery etc. can charge-discharge battery, it is contemplated that main power source has the function to stand-by power supply charging, the normal electricity of main power source
Pressure is more slightly higher than stand-by power supply, such as main power source is 5V voltages, stand-by power supply 4.2V.
In the present embodiment, the charging circuit 101 includes the first PMOS, and the first PMOS parasitism has two poles
Pipe.
Specifically, two PMOSs MP1 and MP2 are included referring to Fig. 2, the first PMOS, each PMOS parasitism has
One diode.During work, main power source is connected by MP1, MP2 with stand-by power supply, realizes charging of the main power source to stand-by power supply,
The on or off of the charging circuit 101 is realized by controlling MP1 and MP2 grid step voltage.
In the present embodiment, the detection circuit 102 includes comparator, and the input of the comparator meets the master respectively
Power supply, the stand-by power supply and reference voltage VREF, the output end of the comparator export the detection signal and cut to described
Change circuit 103.
Specifically, by selecting different VREF magnitudes of voltage, main power source VDD and stand-by power supply V can be setBATMistake
Pressure, under-voltage condition.Such as the normal supply voltage of main power source is 5V, then it is considered as less than 3V under-voltage, then for example it is full for stand-by power supply
The supply voltage filled is 4.2V, is under-voltage condition less than 3V, is overvoltage condition higher than 4.25V.
Referring to Fig. 3, one group of parameter of citing is specifically described.When VDD is 5V, RAFor 100 Europe, RBFor 100 Europe, RHYSFor
100 Europe, are computed, and can be derived that, from resistance RAAnd RBBetween the detection voltage that takes be 5/3V, about 1.66V, it is assumed that VREF is
1.2V, then comparator relatively show that vdd voltage is not under-voltage, then do not export brown-out detection signal to switching circuit 103.When VDD is
3V, RAFor 100 Europe, RBFor 100 Europe, RHYSFor 100 Europe, it is computed, can be derived that, from resistance RAAnd RBBetween the detection voltage that takes
For 1V, it is assumed that VREF 1.2V, then comparator relatively show that vdd voltage is under-voltage, output brown-out detection signal is to switching circuit
103。
It should be noted that Fig. 3 is a kind of comparator detection circuit for the detection function for detecting circuit 102, pass through change
Resistance and power supply, and VREF values, can realize a variety of detection functions.For example, detection stand-by power supply VBATIt is whether over-pressed
When, now, the VDD in Fig. 3 replaces with VBAT, meanwhile, VREF inputs from comparator COMP negative terminal, by resistance RAAnd RBBetween take
Detection voltage inputted from the anode of comparator, when detecting voltage and being more than VREF, show that stand-by power supply is over-pressed.
Further, each detection function for detecting circuit 102 is required to a corresponding comparator circuit, such as right
Main power source VDD overvoltage detection, under-voltage detection, to stand-by power supply VBATOvervoltage detection, under-voltage detection, thus at least need four
Individual comparator circuit.
In the present embodiment, the switching circuit 103 includes the first NMOS tube, the second PMOS, first NMOS tube
Access the detection signal with the grid of second PMOS, the drain electrode of first NMOS tube and second PMOS with
The grid connection of first PMOS.
Specifically, two NMOS tubes, respectively MN1 and MN2, the 2nd PMOS are included referring again to Fig. 2, the first NMOS tube
Pipe includes two PMOSs, respectively MP3 and MP4.For detection signal, detection signal is divided into four kinds, is that main power source supplies respectively
Electricity and stand-by power supply charging, main power source are powered and stand-by power supply completely fills, mains power failure and stand-by power supply are powered and main power source
Failure and stand-by power supply failure, wherein, failure include power-off and it is under-voltage.It is different that different detection signals corresponds to switching circuit 103
Switching state.
When switching circuit 103 receives the detection signal of main power source power supply and stand-by power supply charging, MN1 and MN2 conductings,
MP3 is turned on, and MP4 disconnects, and now, is powered by main power source, while main power source charges to stand-by power supply.
When switching circuit 103 receives the detection signal that main power source is powered and stand-by power supply completely fills, MN1 and MN2 disconnect,
MP3 is turned on, and MP4 conductings, now, is powered by main power source, and stand-by power supply has been filled with electricity, due to main power source and standby electricity
Charging circuit 101 between source is disconnected, and protective effect is served to stand-by power supply.
When switching circuit 103 receives the detection signal of mains power failure and stand-by power supply power supply, MN1 and MN2 disconnect,
MP3 is turned on, and MP4 conductings, now, mains power failure, in-put of spare power supply uses.
When switching circuit 103 receives the detection signal of mains power failure and stand-by power supply failure, MN1 and MN2 disconnect,
MP3 disconnects, and MP4 conductings, now, main power source and the equal failure of stand-by power supply, into holding state, the also inactivity that neither charges is defeated
Go out.
It should be noted that in order to improve the usage time of stand-by power supply, the output end of main power source and stand-by power supply is entered
Row is separated, and by carrying out classification setting to load, the load that low-load is set is connected to the output end VOUT2 of stand-by power supply, will
The load that full load is set is connected to the output end VOUT1 of main power source, for example, with reference to Fig. 4, loads as LED, can be with from Fig. 4
Find out, main power source is connected with all LED, and stand-by power supply is connected with a part of LED, when mains power failure is switched to standby electricity
During source, stand-by power supply is only powered for a part of LED, is powered, is extended for all LEDs relative to the stand-by power supply of routine
The usage time of stand-by power supply.
In the present embodiment, the main power source is dc source.
The utility model is realized when standby by carrying out real-time sampling and judgement to the voltage of main power source and stand-by power supply
Charged automatically to stand-by power supply during electric quantity of power supply deficiency, charging is automatically stopped after emergency power supply is full of；Realize pair
Stand-by power supply carries out the function of Charge Management and protection；When mains power failure, stand-by power supply is enabled automatically, and due to PMOS
The barrier of pipe, avoid stand-by power supply and pour in down a chimney to main power source progress electric current.Meanwhile it is also simple with circuit structure, reliability is high,
It is quick on the draw, the advantages of precision is high.
Embodiment two
Referring to Fig. 5, the utility model embodiment provides the dual power supply power provided in a kind of chip, including embodiment one
The control circuit of switch ways, the control circuit of the dual power supply power switch path include charging circuit 101, detection circuit
102 and switching circuit 103；
One end connection main power source of the charging circuit 101, the other end connection stand-by power supply of the charging circuit 101,
The stand-by power supply is charged for the main power source；
The input of the detection circuit 102 is connected with the main power source and the stand-by power supply respectively, the detection electricity
The output end on road 102 is connected with the switching circuit 103, and the detection circuit 102 is used to detect the main power source and described standby
With the magnitude of voltage of power supply, and detection signal corresponding with the magnitude of voltage is exported to the switching circuit 103；
The switching circuit 103 is connected with the charging circuit 101, for electric to the charging according to the detection signal
Road 101 is turned on or off.
In the present embodiment, the charging circuit 101 includes the first PMOS, and the first PMOS parasitism has two poles
Pipe.
In the present embodiment, the detection circuit 102 includes comparator, and the input of the comparator meets the master respectively
Power supply, the stand-by power supply and reference voltage, the output end of the comparator export the detection signal to the switching electricity
Road 103.
In the present embodiment, the switching circuit 103 includes the first NMOS tube, the second PMOS, first NMOS tube
Access the detection signal with the grid of second PMOS, the drain electrode of first NMOS tube and second PMOS with
The grid connection of first PMOS.
In the present embodiment, the main power source is dc source.
Above-mentioned the utility model embodiment sequence number is for illustration only, does not represent the quality of embodiment.
Device embodiment described above is only schematical, wherein the unit illustrated as separating component can
To be or may not be physically separate, it can be as the part that unit is shown or may not be physics list
Member, you can with positioned at a place, or can also be distributed on multiple NEs.It can be selected according to the actual needs
In some or all of module realize the purpose of this embodiment scheme.Those of ordinary skill in the art are not paying creativeness
Work in the case of, you can to understand and implement.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can
Realized by the mode of software plus required general hardware platform, naturally it is also possible to pass through hardware.Based on such understanding, on
The part that technical scheme substantially in other words contributes to prior art is stated to embody in the form of software product, should
Computer software product can store in a computer-readable storage medium, such as ROM/RAM, magnetic disc, CD, including some fingers
Make to cause a computer equipment (can be personal computer, server, or network equipment etc.) to perform each implementation
Method described in some parts of example or embodiment.
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model
Within new spirit and principle, any modification, equivalent substitution and improvements made etc., guarantor of the present utility model should be included in
Within the scope of shield.
Claims (10)
1. a kind of control circuit of dual power supply power switch path, it is characterised in that including charging circuit, detection circuit and cut
Change circuit；
One end connection main power source of the charging circuit, the other end connection stand-by power supply of the charging circuit, for the master
Power supply charges to the stand-by power supply；
The input of the detection circuit is connected with the main power source and the stand-by power supply respectively, the output of the detection circuit
End is connected with the switching circuit, and the detection circuit is used for the magnitude of voltage for detecting the main power source and the stand-by power supply, and
Detection signal corresponding with the magnitude of voltage is exported to the switching circuit；
The switching circuit is connected with the charging circuit, for being connected according to the detection signal to the charging circuit
Or shut-off.
2. the control circuit of dual power supply power switch path according to claim 1, it is characterised in that the charging circuit
Including the first PMOS, the first PMOS parasitism has diode.
3. the control circuit of dual power supply power switch path according to claim 2, it is characterised in that the detection circuit
Including comparator, the input of the comparator connects the main power source, the stand-by power supply and reference voltage, the ratio respectively
Output end compared with device exports the detection signal to the switching circuit.
4. the control circuit of dual power supply power switch path according to claim 3, it is characterised in that the switching circuit
Including the first NMOS tube, the second PMOS, the grid access detection letter of first NMOS tube and second PMOS
Number, the drain electrode of first NMOS tube and second PMOS is connected with the grid of first PMOS.
5. the control circuit of dual power supply power switch path according to claim 4, it is characterised in that the main power source is
Dc source.
6. a kind of chip, it is characterised in that include the control circuit of dual power supply power switch path, the dual power supply power switch
The control circuit of path includes charging circuit, detection circuit and switching circuit；
One end connection main power source of the charging circuit, the other end connection stand-by power supply of the charging circuit, for the master
Power supply charges to the stand-by power supply；
The input of the detection circuit is connected with the main power source and the stand-by power supply respectively, the output of the detection circuit
End is connected with the switching circuit, and the detection circuit is used for the magnitude of voltage for detecting the main power source and the stand-by power supply, and
Detection signal corresponding with the magnitude of voltage is exported to the switching circuit；
The switching circuit is connected with the charging circuit, for being connected according to the detection signal to the charging circuit
Or shut-off.
7. chip according to claim 6, it is characterised in that the charging circuit includes the first PMOS, and described first
PMOS parasitism has diode.
8. chip according to claim 7, it is characterised in that the detection circuit includes comparator, the comparator
Input connects the main power source, the stand-by power supply and reference voltage respectively, and the output end of the comparator exports the inspection
Signal is surveyed to the switching circuit.
9. chip according to claim 8, it is characterised in that the switching circuit includes the first NMOS tube, the 2nd PMOS
Pipe, the grid of first NMOS tube and second PMOS access the detection signal, first NMOS tube and described
The drain electrode of second PMOS is connected with the grid of first PMOS.
10. chip according to claim 9, it is characterised in that the main power source is dc source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720584869.4U CN206712540U (en) | 2017-05-24 | 2017-05-24 | The control circuit of dual power supply power switch path, chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720584869.4U CN206712540U (en) | 2017-05-24 | 2017-05-24 | The control circuit of dual power supply power switch path, chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206712540U true CN206712540U (en) | 2017-12-05 |
Family
ID=60462793
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720584869.4U Expired - Fee Related CN206712540U (en) | 2017-05-24 | 2017-05-24 | The control circuit of dual power supply power switch path, chip |
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| CN (1) | CN206712540U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106972622A (en) * | 2017-05-24 | 2017-07-21 | 成都卓创科微电子有限公司 | Control circuit, the chip of dual power supply power switch path |
-
2017
- 2017-05-24 CN CN201720584869.4U patent/CN206712540U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106972622A (en) * | 2017-05-24 | 2017-07-21 | 成都卓创科微电子有限公司 | Control circuit, the chip of dual power supply power switch path |
| CN106972622B (en) * | 2017-05-24 | 2023-11-28 | 江阴元灵芯旷微电子技术有限公司 | Control circuit and chip of dual-power switch path |
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Granted publication date: 20171205 Termination date: 20180524 |