CN112600293A - Dual-power input management circuit and terminal equipment - Google Patents
Dual-power input management circuit and terminal equipment Download PDFInfo
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- CN112600293A CN112600293A CN202011351973.1A CN202011351973A CN112600293A CN 112600293 A CN112600293 A CN 112600293A CN 202011351973 A CN202011351973 A CN 202011351973A CN 112600293 A CN112600293 A CN 112600293A
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- 239000003990 capacitor Substances 0.000 claims description 35
- 230000009977 dual effect Effects 0.000 claims description 12
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a dual-power input management circuit and terminal equipment, wherein the dual-power input management circuit comprises a power supply circuit, the power supply circuit comprises a first power input end, a second power input end, a first switch circuit, a second switch circuit, a third switch, a sixth switch, a seventh switch, a battery and a power supply input end, when the first power and the second power are simultaneously connected with the first power input end and the second power input end, the sixth switch is conducted to conduct the second switch circuit, the first power supplies power to the power supply input end, when the first power input end and the second input end are not connected with power, the seventh switch is conducted, the battery supplies power to the power supply input end, the invention selectively controls the on-off of the first switch circuit and the second switch circuit through the sixth switch to further selectively control the power supply of the first power or the second power, when the first power or the second power is not connected, the battery BAT _ VCC supplies power, and seamless and continuous power supply of the input power supply is realized.
Description
Technical Field
The invention relates to the technical field of power management, in particular to a dual-power input management circuit and terminal equipment.
Background
Nowadays, electronic products are increasingly popularized, requirements on stability and reliability of a power supply system of the electronic products are higher and higher, especially electronic products in key use fields, and dual-power electronic products are more and more, how to realize stable, lossless and automatic switching of power supplies in the dual-power electronic products is an urgent requirement on the dual-power electronic products, and meanwhile, higher requirements on system reliability of the power supplies are also provided. Although the current automatic switching circuit can realize the above functions, there are many other side effects, such as: the extra power consumption is too high, which is not in accordance with the current green economy, or the problem of untimely response exists.
Disclosure of Invention
In view of the above technical problems, embodiments of the present invention provide a dual power input management circuit and a terminal device, which can ensure seamless continuous power supply of an input power supply and ensure stable operation of a device system.
A first aspect of embodiments of the present invention provides a dual power input management circuit, which includes a power supply circuit, the power supply circuit includes a first power input terminal, a second power input terminal, a first switch circuit, a second switch circuit, a third switch, a sixth switch, a seventh switch, a battery, and a power input terminal, the first power input terminal is connected to the power input terminal and a first terminal of the seventh switch through the first switch circuit, the second power input terminal is connected to the power input terminal and a first terminal of the seventh switch through the second switch circuit, a first terminal of the third switch is connected to the first switch circuit, a second terminal of the third switch is connected to one terminal of the first power input terminal and one terminal of the sixth switch, a second switch circuit and a second power input terminal at the other terminal of the sixth switch, a second terminal of the seventh switch is connected to the battery, when the first power and the second power are connected to the first power input terminal and the second power input terminal at the same time, the sixth switch is switched on to enable the second switch circuit to be switched on, the first power supply supplies power to the power supply input end, when no power supply is connected to the first power supply input end and the second input end, the seventh switch is switched on, and the battery supplies power to the power supply input end. .
Optionally, the first switch circuit includes a first MOS transistor and a second MOS transistor, the second end of the first MOS transistor is connected to the first power input terminal, the first end of the first MOS transistor is connected to the first end of the second MOS transistor, the third end of the first MOS transistor is connected to the first end of the third switch and the third end of the second MOS transistor, respectively, and the second end of the second MOS transistor is connected to the first end of the seventh switch.
Optionally, the second switching circuit includes a fourth MOS transistor and a fifth MOS transistor, the second end of the fourth MOS transistor is connected to the second power input terminal, the first end of the fourth MOS transistor is connected to the first end of the fifth MOS transistor, the third end of the fourth MOS transistor is connected to the first end of the sixth switch and the third end of the fifth MOS transistor, respectively, and the second end of the fifth MOS transistor is connected to the first end of the seventh switch.
Optionally, the power supply further comprises a first capacitor, and one end of the first capacitor is connected to the first power input end, the second end of the first MOS transistor, and the second end of the third switch, respectively.
Optionally, the switch further includes a second capacitor and a third capacitor, one end of the second capacitor is connected to the first end of the first MOS transistor and the first end of the second MOS transistor respectively, the second end of the second capacitor is connected to the first end of the third capacitor respectively, the third end of the second MOS transistor and the first end of the third switch are connected, and the second end of the third capacitor is grounded.
Optionally, the switch further comprises a fourth capacitor, and one end of the fourth capacitor is connected to the second power input end, the second end of the fourth MOS transistor, and the second end of the sixth switch, respectively.
Optionally, the charging circuit further includes a charging circuit, the charging circuit includes an eighth switch, a ninth switch and a tenth switch, a second end of the eighth switch is connected to the first power input end, a first end of the ninth switch and the charging input end are respectively connected to the first end, a third end of the ninth switch is connected to the second power input end, a second end of the ninth switch is connected to the second power input end, a third end of the ninth switch is connected to the first end of the tenth switch, a second end of the tenth switch is connected to the second power input end, and a third end of the tenth switch is grounded.
Optionally, the third switch, the sixth switch and the seventh switch are triodes.
Optionally, the tenth switch is a triode.
A second aspect of an embodiment of the present invention provides a terminal device, including any one of the dual power input management circuits described above, for automatically switching a dual power supply.
The technical scheme provided by the embodiment of the invention comprises a first power supply input end, a second power supply input end, a battery, a first switch circuit, a second switch circuit, a third switch, a sixth switch and a seventh switch, wherein when the first power supply and the second power supply are simultaneously connected with the first power supply input end and the second power supply input end, the sixth switch is conducted to enable the second switch circuit to be conducted, the second power supply supplies power to the power supply input end, and when no power supply is connected to the first power supply input end and the second power supply input end, the seventh switch is conducted, and the battery supplies power to the power supply input end.
Drawings
FIG. 1 is a circuit schematic of one embodiment of a power supply circuit of the present invention;
fig. 2 is a circuit diagram of a charging circuit according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a dual power input management circuit, which includes a power supply circuit, the power supply circuit includes a first power input terminal DC _ PAD _ IN, a second power input terminal DC _ DOCK _ IN, a first switch circuit 10, a second switch circuit 20, a third switch Q3, a sixth switch Q6, a seventh switch Q7, a battery BAT _ VCC, and a power input terminal DC12V _ IN, the first power input terminal DC _ PAD _ IN is connected to the first terminals of the power input terminal DC12V _ IN and the seventh switch Q7 through the first switch circuit 10, the second power input terminal DC _ DOCK _ IN is connected to the first terminals of the power input terminal DC12V _ IN and the seventh switch Q7 through the second switch circuit 20, the D terminal of the third switch Q3 is connected to the first switch circuit 10, and the G terminals are connected to the first power input terminal DC _ PAD _ IN, the first switch circuit 10, and the D6 of the sixth switch Q3524, the S terminal of the third switch Q3 is grounded; the D terminal of the sixth switch Q6 is further connected to the second switch circuit 20 through a backward diode, the G terminal of the sixth switch Q6 is connected to the second power input terminal DC _ DOCK _ IN, the S terminal is grounded, the second terminal of the seventh switch Q7 is connected to the battery BAT _ VCC, and the third terminal is connected to the first power input terminal DC _ PAD _ IN and the second power input terminal DC _ DOCK _ IN through a backward diode, respectively. When the first power supply and the second power supply are connected to the first power input terminal DC _ PAD _ IN and the second power input terminal DC _ DOCK _ IN at the same time, the sixth switch Q6 is turned on to turn on the second switch circuit 20, the first power supply supplies power to the power supply input terminal DC12V _ IN, when no power is connected to both the first power input terminal DC _ PAD _ IN and the second power input terminal DC _ DOCK _ IN, the seventh switch Q7 is turned on, and the battery BAT _ VCC supplies power to the power supply input terminal DC12V _ IN.
The invention is provided with a first power supply input end DC _ PAD _ IN, a second power supply input end DC _ DOCK _ IN and a battery BAT _ VCC, the on-off of a first switch circuit 10 and a second switch circuit 20 is selectively controlled through a sixth switch Q6, the power supply of the first power supply or the second power supply is further selectively controlled, and when the first power supply or the second power supply does not exist, the battery BAT _ VCC supplies power.
IN one embodiment of the present invention, the first switch circuit 10 includes a first MOS transistor Q1 and a second MOS transistor Q2, a second terminal of the first MOS transistor Q1 is connected to the first power input terminal DC _ PAD _ IN, a first terminal of the first MOS transistor Q1 is connected to a first terminal of the second MOS transistor Q2, a third terminal of the first MOS transistor Q1 is connected to the D terminal of the third switch Q3 and the third terminal of the second MOS transistor Q2, and a second terminal of the second MOS transistor Q2 is connected to a first terminal of the seventh switch Q7. The second switch circuit 20 includes a fourth MOS transistor Q4 and a fifth MOS transistor Q5, the second end of the fourth MOS transistor Q4 is connected to the second power input terminal DC _ DOCK _ IN, the first end of the fourth MOS transistor Q4 is connected to the first end of the fifth MOS transistor Q5, the third end of the fifth MOS transistor Q5 is connected to the D-terminal of the sixth switch Q6 and the third end of the fifth MOS transistor Q5, and the second end of the fifth MOS transistor is connected to the first end of the seventh switch Q7.
IN one embodiment of the present invention, the power supply circuit further includes a first capacitor C1, one end of the first capacitor C1 is connected to the first power input terminal DC _ PAD _ IN, the second end of the first MOS transistor Q1, and the G end of the third switch Q3, one end of the first capacitor C1 is further grounded through a resistor R2, and the other end of the capacitor C1 is grounded.
IN one embodiment of the present invention, the power supply circuit further includes a fourth capacitor C4, one end of the fourth capacitor C4 is connected to the second power input terminal DC _ DOCK _ IN, the second end of the fourth MOS transistor Q4 and the G-th end of the sixth switch Q6, and one end of the fourth capacitor C4 is further connected to ground through a capacitor C6.
In one embodiment of the present invention, the power supply circuit further includes a second capacitor C2 and a third capacitor C3, one end of the second capacitor C2 is connected to the first end of the first MOS transistor Q1 and the first end of the second MOS transistor Q2, the second end of the second capacitor C2 is connected to the first end of the third capacitor C3, the third end of the second MOS transistor Q2 and the D end of the third switch Q3, and the second end of the third capacitor C3 is grounded.
The third capacitor C3 of the present invention is used for delaying the power supply of the first power input terminal DC _ PAD _ IN from the first MOS transistor Q1 and the second MOS transistor Q2 to pass through the first MOS transistor Q1 when the power supply of the first power input terminal DC _ PAD _ IN and the power supply of the second power input terminal DC _ DOCK _ IN are switched, and the second MOS transistor Q2 supplies power to the power supply DC12V _ IN. When the first power input terminal DC _ PAD _ IN and the second power input terminal DC _ DOCK _ IN have no power input, the battery BAT _ VCC supplies power to the power supply DC12V _ IN through the seventh switch Q7. The battery BAT _ VCC power supply mainly ensures seamless continuous power supply of the input power supply and stable operation of the equipment system.
Referring to fig. 1, the principle of the power supply circuit is as follows: when the first power input terminal DC _ PAD _ IN and the second power input terminal DC _ DOCK _ IN have power inputs simultaneously, the sixth switch Q6 is turned on, the third switch Q3 is turned off, the first MOS transistor Q1 and the second MOS transistor Q2 are turned off, the path of the first power input terminal DC _ PAD _ IN is cut off, the fourth MOS transistor Q4 and the fifth MOS transistor Q5 are turned on, the power of the second power input terminal DC _ DOCK _ IN is supplied to the power supply DC12V _ IN through the fourth MOS transistor Q4 and the fifth MOS transistor Q5. When the second power input terminal DC _ DOCK _ IN has no power input, the third switch Q3 is turned on, the first MOS transistor Q1 and the second MOS transistor Q2 are turned on, and the power of the first power input terminal DC _ PAD _ IN is supplied to the power supply DC12V _ IN through the first MOS transistor Q1 and the second MOS transistor Q2.
IN an embodiment of the invention, referring to fig. 2, the dual power input management circuit further includes a charging circuit, the charging circuit includes an eighth switch Q8, a ninth switch Q9 and a tenth switch Q10, a second terminal of the eighth switch Q8 is connected to the first power input terminal DC _ PAD _ IN, a first terminal of the eighth switch Q8 is respectively connected to a first terminal of the ninth switch Q9 and the charging input terminal CH _ VCC, the charging input terminal CH _ VCC is used for charging the battery, a third terminal of the eighth switch Q8 is connected to the second power input terminal DC _ DOCK _ IN, a second terminal of the ninth switch Q9 is connected to the second power input terminal DC _ DOCK _ IN, a third terminal of the ninth switch Q9 is connected to the D terminal of the tenth switch Q10, a G terminal of the tenth switch Q10 is connected to the second power input terminal DC _ DOCK _ IN, and an S terminal of the tenth switch Q10 is grounded.
The principle of the charging circuit is as follows: when the first power input terminal DC _ PAD _ IN and the second power input terminal DC _ DOCK _ IN have power inputs simultaneously, the tenth switch Q10 is turned on, and further the ninth switch Q9 is turned on, the eighth switch Q8 is turned off, the power supply of the second power input terminal DC _ DOCK _ IN supplies power to the charging input terminal CH _ VCC through the ninth switch Q9, and when the second power input terminal DC _ DOCK _ IN has no power input, the eighth switch Q8 is turned on at this time, and the power supply of the first power input terminal DC _ PAD _ IN supplies power to the charging input terminal CH _ VCC through the eighth switch Q8. The dual power input is realized to supply power to the BATTERY CHARGER IC and charge the BATTERY.
In the invention, the third switch Q3, the sixth switch Q6 and the seventh switch Q7 are triodes. The tenth switch is a transistor Q10.
The dual-power-supply input management circuit in the invention is described above, and the terminal device in the embodiment of the invention is described below, and the terminal device in the invention includes the dual-power-supply input management circuit in any one of the embodiments, and realizes that dual power supply input supplies power to BATTERY CHARGER IC and BATTERY charging is realized through the charging circuit and the power supply circuit.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A dual-power input management circuit is characterized by comprising a power supply circuit, wherein the power supply circuit comprises a first power input end, a second power input end, a first switch circuit, a second switch circuit, a third switch, a sixth switch, a seventh switch, a battery and a power supply input end, the first power input end is respectively connected with the power supply input end and a first end of the seventh switch through the first switch circuit, the second power input end is respectively connected with the power supply input end and a first end of the seventh switch through the second switch circuit, the first end of the third switch is connected with the first switch circuit, the second end of the third switch is respectively connected with the first power input end and a first end of the sixth switch, the first end of the sixth switch is also connected with the second switch circuit, the second end of the sixth switch is connected with the second power input end, the second end of the seventh switch is connected with the battery, when the first power supply and the second power supply are simultaneously connected with the first power input end and the second power input end, the sixth switch is switched on to enable the second switch circuit to be switched on, the first power supply supplies power to the power supply input end, when no power supply is connected to the first power supply input end and the second input end, the seventh switch is switched on, and the battery supplies power to the power supply input end.
2. The dual-power-supply input management circuit of claim 1, wherein the first switch circuit comprises a first MOS transistor and a second MOS transistor, the second terminal of the first MOS transistor is connected to the first power input terminal, the first terminal of the first MOS transistor is connected to the first terminal of the second MOS transistor, the third terminals of the first MOS transistor and the second MOS transistor are respectively connected to the first terminal of the third switch and the third terminal of the second MOS transistor, and the second terminal of the second MOS transistor is connected to the first terminal of the seventh switch.
3. The dual-power-supply input management circuit of claim 2, wherein the second switch circuit comprises a fourth MOS transistor and a fifth MOS transistor, a second terminal of the fourth MOS transistor is connected to the second power input terminal, a first terminal of the fourth MOS transistor is connected to a first terminal of the fifth MOS transistor, third terminals of the fourth MOS transistor and the fifth MOS transistor are respectively connected to a first terminal of the sixth switch and a third terminal of the fifth MOS transistor, and a second terminal of the fifth MOS transistor is connected to a first terminal of the seventh switch.
4. The dual-power-supply input management circuit of claim 3, further comprising a first capacitor, wherein one end of the first capacitor is connected to the first power input terminal, the second end of the first MOS transistor and the second end of the third switch, respectively.
5. The dual-power-supply input management circuit of claim 3, further comprising a second capacitor and a third capacitor, wherein one end of the second capacitor is connected to the first end of the first MOS transistor and the first end of the second MOS transistor respectively, the second end of the second capacitor is connected to the first end of the third capacitor respectively, the third end of the second MOS transistor and the first end of the third switch, and the second end of the third capacitor is grounded.
6. The dual-power-supply input management circuit of claim 3, further comprising a fourth capacitor, wherein one end of the fourth capacitor is connected to the second power input terminal, the second end of the fourth MOS transistor and the second end of the sixth switch, respectively.
7. The dual-power input management circuit of claim 1, further comprising a charging circuit, wherein the charging circuit comprises an eighth switch, a ninth switch and a tenth switch, a second terminal of the eighth switch is connected to the first power input terminal, a first terminal of the eighth switch is connected to the first terminal of the ninth switch and the charging input terminal, respectively, the charging input terminal is used for charging the battery, a third terminal of the eighth switch is connected to the second power input terminal, a second terminal of the ninth switch is connected to the second power input terminal, a third terminal of the ninth switch is connected to the first terminal of the tenth switch, a second terminal of the tenth switch is connected to the second power input terminal, and a third terminal of the tenth switch is grounded.
8. The dual power input management circuit of claim 1, wherein the third, sixth, and seventh switches are transistors.
9. The dual power input management circuit of claim 7, wherein the tenth switch is a triode.
10. A terminal device comprising the dual power input management circuit of any one of claims 1-9, wherein the dual power supply is automatically switched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011351973.1A CN112600293A (en) | 2020-11-27 | 2020-11-27 | Dual-power input management circuit and terminal equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011351973.1A CN112600293A (en) | 2020-11-27 | 2020-11-27 | Dual-power input management circuit and terminal equipment |
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| Publication Number | Publication Date |
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| CN112600293A true CN112600293A (en) | 2021-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011351973.1A Pending CN112600293A (en) | 2020-11-27 | 2020-11-27 | Dual-power input management circuit and terminal equipment |
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| CN (1) | CN112600293A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204721079U (en) * | 2015-04-20 | 2015-10-21 | 北京航天自动控制研究所 | Dual-power automatic switching and charging circuit |
| CN108418301A (en) * | 2018-05-15 | 2018-08-17 | 深圳市菲菱科思通信技术股份有限公司 | A kind of automatic switch-over circuit of dual power supply input |
| CN110571911A (en) * | 2019-07-30 | 2019-12-13 | 国网江苏省电力有限公司 | Active isolated network control method suitable for medium-low voltage alternating current-direct current hybrid power distribution network |
| CN111030258A (en) * | 2019-12-30 | 2020-04-17 | Tcl通力电子（惠州）有限公司 | Three-way power supply switching circuit, device and electronic equipment |
-
2020
- 2020-11-27 CN CN202011351973.1A patent/CN112600293A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204721079U (en) * | 2015-04-20 | 2015-10-21 | 北京航天自动控制研究所 | Dual-power automatic switching and charging circuit |
| CN108418301A (en) * | 2018-05-15 | 2018-08-17 | 深圳市菲菱科思通信技术股份有限公司 | A kind of automatic switch-over circuit of dual power supply input |
| CN110571911A (en) * | 2019-07-30 | 2019-12-13 | 国网江苏省电力有限公司 | Active isolated network control method suitable for medium-low voltage alternating current-direct current hybrid power distribution network |
| CN111030258A (en) * | 2019-12-30 | 2020-04-17 | Tcl通力电子（惠州）有限公司 | Three-way power supply switching circuit, device and electronic equipment |
Non-Patent Citations (1)
| Title |
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| 潘野;童玲;田雨;: "光伏发电的嵌入式系统电源设计", 单片机与嵌入式系统应用, no. 10, 1 October 2011 (2011-10-01), pages 19 - 22 * |
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