CN114400734A - Double-circuit power supply circuit with instantaneous switch for activating battery to supply power - Google Patents
Double-circuit power supply circuit with instantaneous switch for activating battery to supply power Download PDFInfo
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- CN114400734A CN114400734A CN202111572908.6A CN202111572908A CN114400734A CN 114400734 A CN114400734 A CN 114400734A CN 202111572908 A CN202111572908 A CN 202111572908A CN 114400734 A CN114400734 A CN 114400734A
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- 230000003213 activating effect Effects 0.000 title claims abstract description 11
- 230000004913 activation Effects 0.000 claims abstract description 32
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 claims abstract description 18
- 239000003990 capacitor Substances 0.000 claims description 10
- 230000009977 dual effect Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 230000007547 defect Effects 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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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
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention discloses a double-circuit power supply circuit with a snap switch activating a battery for supplying power, which comprises: the key activation and power supply control system comprises a DCDC circuit (1), a key activation and power supply priority control circuit (2), a control circuit (3) and a battery (4); the battery circuit can be activated through the snap switch, and the telephone on the single chip can quickly take over the function of the switch to continuously activate the battery circuit. The circuit is simple and ingenious, is built by using simple discrete devices, has high reliability, and only M ohm-level resistance generates mu A-level current loss in a power-off state.
Description
Technical Field
The invention relates to a power supply circuit, in particular to a double-circuit power supply circuit for activating a battery to supply power by a snap switch.
Technical Field
In the field of electronic circuits, electronic equipment is generally provided with two power supply modes of a battery and external power supply, the external power supply has high priority, and after a snap switch is pressed down, a battery power supply loop can be activated and cut off according to the requirement of the battery power supply loop. The traditional circuit consists of a key control chip, a power supply chip and a power supply selection chip, and has the defects that the key chip is required to be in a working state all the time, the power consumption is relatively larger, equipment cannot be stored for a long time, a plurality of special chips are required besides a processor, the complexity is higher, and the partial chip is not allowed to work in a shutdown state on certain specific occasions.
Disclosure of Invention
The invention aims to provide a double-circuit power supply circuit with a snap switch for activating a battery to supply power, and solves the problems that a chip still needs to be in a working state in a shutdown state and the complexity is high.
A snap-action switch activated battery powered dual supply circuit comprising: DCDC circuit, battery, button activation and power supply priority control circuit and control circuit.
The DCDC circuit and the battery are respectively connected with two power input ends of the key activation and power supply priority control circuit, and the output end of the key activation and power supply priority control circuit is connected with the control circuit.
The DCDC circuit converts the external power supply into a voltage of 3.3V suitable for internal use; the key activation and power supply priority control circuit is used for controlling the power supply priority and activating a power supply path of the battery after the key is pressed; the control circuit is used for controlling the battery power supply loop to be continuously kept or disconnected after the button is released. The input of the DCDC circuit is external power supply, the DCDC circuit is converted into VCC3D3V, the voltage and the VBAT voltage of the battery are input to the key activation and power supply priority control circuit, the key activation and power supply priority control circuit selectively outputs the power supply voltage and then transmits the power supply voltage to the control circuit, and the control circuit module controls the key activation and power supply priority control circuit through IO control signals after being powered on.
A DCDC circuit, comprising: the circuit comprises a chip U4, a capacitor C37, a resistor R22, a resistor R26, a resistor R27, a resistor R31 and a capacitor C39. The capacitor C37 is connected with an input pin of the chip U4, one end of the resistor R22, one end of the resistor R26 and the enable 2 pin of the chip U4 are connected, the other end of the resistor R22 is connected with a power supply, and the other end of the resistor R26 is connected with a digital ground; one end of the resistor R27 is connected with the feedback pin 4 of the chip U4, and the other end is grounded; one end of the resistor R31 is connected with the feedback pin 4 of the chip U4, and the other end is connected with VCC3V 3.
The key activation and power supply priority control circuit includes: chip U6 BL2554 electronic switch, electric capacity C6, electric capacity C13, electric capacity C33, MOS Q2, resistance R24, diode D8, resistance R29, diode D6, resistance R42, resistance R23, diode D5, snap switch SW1, MOS Q4, resistance R37 and resistance R38. One end of the snap switch SW1 is grounded, the other end of the snap switch SW1, one end of the resistor R23 and the cathode of the diode D5 are connected, and the diode D5 is grounded in positive level; the BAT _ KEEP _ ON # signal of the MOS Q21 pin is connected to the other end of the resistor R23, and is also connected to the resistor R42 and the resistor R29, and the other ends of the resistor R42 and the resistor R29 are respectively connected to VBAT and VCC3V 3. The pin MOS Q22 is grounded, the pin MOS Q23 is VBAT _ IN _ ON, the resistor R24 is connected to the VBAT signal and is connected with the pin U64 of the chip; VBAT signal is connected to chip U65 foot, and 1 foot and VCC _ BAT _ MCU signal connection, 3 feet and resistance R25 one end are connected, and the resistance R25 other end ground. One end of the resistor R37, one end of the resistor R38 and the MOS Q41 pin are interconnected, and meanwhile, the other ends of the resistor R37 and the resistor R38 are respectively connected with VCC-5V, GND.
A control circuit, comprising: the device comprises a processor U1 GD32F103, a MOS Q12N7002, a MOS Q32N7002, a resistor R30 and a resistor R28. The U18 pin of the processor is connected with the MOS Q11 pin, the 1 pin is connected to the ground through R28, the MOS Q12 pin is grounded, and the MOS Q13 pin is connected with the MOS Q31 pin and the MOS Q21 pin.
The battery is a standard component, and a primary lithium sub-capacity type battery with the rated voltage of 3.6V and the capacity of 800mAh is selected.
The snap switch SW1 is an external activation switch, after the snap switch SW1 is pressed, G of the MOS Q2 is at a low level, at the moment, the MOS Q2 is turned off, an enable pin of an electronic switch BL2554 of the chip U6 is changed into a high level, and the battery is activated; after the battery is activated, the processor U1 is powered ON, the control pin PA1, namely the BAT _ KEEP _ ON signal level, is given that the default level is low by the pull-down resistor, when the processor controls the PA1 to be high, the MOS Q1 is conducted, therefore, the BAT _ KEEP _ ON # is changed into low level, the function of the BAT _ KEEP _ ON # is equivalent to that of pressing a key, and the battery can be continuously powered without continuously pressing the snap switch. When the pin of the single chip microcomputer control PA1 is in low level, the MOS Q1 is turned off, and the state of BAT _ KEEP _ ON # level is determined by the state of the key activation and power supply priority control circuit module. When the external voltage and the battery exist at the same time, the MOS Q4G is conducted at a high level, so that VBAT _ IN _ ON is at a low level, and the disconnection of a battery circuit is ensured when external power supply exists; when no external power is supplied, G of the MOS Q2 is pulled up by VBAT, so the MOS Q2 is turned ON, pin 4 of U6 is low, that is, BL2554 is not enabled at this time, SW1 is pressed, BAT _ KEEP _ ON # is low, Q2 is turned off, VBAT _ IN _ ON signal is high, U6 is turned ON at this time, the battery is activated, and the following load circuit is successfully powered ON.
The circuit of the invention is simple and ingenious, is built by using simple discrete devices, has high reliability, and only M ohm level resistance generates mu A level current loss in a power-off state. The battery circuit can be activated through the snap switch, the telephone on the singlechip can quickly take over the switch to continuously activate the battery circuit, and other circuits which are started through the snap switch are all in a power-on working state of partial circuits; the power-off of the battery activation loop can be flexibly controlled according to the application of the processor.
Drawings
FIG. 1 is a schematic diagram of a dual power circuit for activating a battery to provide power by a snap switch;
FIG. 2 is a schematic diagram of the externally powered DCDC circuit of a snap-action switch activated battery powered dual supply circuit;
FIG. 3 is a schematic diagram of a dual power supply circuit for activating a battery to supply power by a snap switch, wherein the key activation and power supply priority control circuit is shown in the figure;
fig. 4 is a schematic diagram of the control circuit of a dual power supply circuit for activating battery power by a snap switch.
Detailed Description
A snap-action switch activated battery powered dual supply circuit comprising: DCDC circuit 1, key activation and power supply priority control circuit 2, control circuit 3 and battery 4.
The DCDC circuit 1 converts the external power supply into a voltage of 3.3V suitable for internal use; the key activation and power supply priority control circuit is used for controlling the power supply priority, activating a power supply circuit of the battery 4 after a key is pressed down and controlling the DCDC circuit to have the highest priority; the control circuit 3 is used for controlling the battery 4 loop to keep or disconnect after the key is released. The DCDC circuit 1 is used for supplying power to the outside, converting the power into VCC3D3V, inputting the power into the key activation and power supply priority control circuit 2 together with the voltage of the battery 4, outputting the power supply voltage by the key activation and power supply priority control circuit 2 and then transmitting the power supply voltage to the control circuit 3, and controlling the key activation and power supply priority control circuit 2 to open the power supply path of the battery 4 through an IO control signal after the control circuit 3 is powered on.
The key activation and power supply priority control circuit 2 includes: chip U6 BL2554 electronic switch, electric capacity C6, electric capacity C13, electric capacity C33, MOS Q2, resistance R24, diode D8, resistance R29, diode D6, resistance R42, resistance R23, diode D5, snap switch SW1, MOS Q4, resistance R37 and resistance R38. One end of the snap switch SW1 is grounded, the other end of the snap switch SW1, one end of the resistor R23 and the cathode of the diode D5 are connected, and the diode D5 is grounded in positive level; the BAT _ KEEP _ ON # signal of the MOS Q21 pin is connected to the other end of the resistor R23, and is also connected to the resistor R42 and the resistor R29, and the other ends of the resistor R42 and the resistor R29 are respectively connected to VBAT and VCC3V 3. The pin MOS Q22 is grounded, the pin MOS Q23 is VBAT _ IN _ ON, the resistor R24 is connected to the VBAT signal and is connected with the pin U64 of the chip; VBAT signal is connected to chip U65 foot, and 1 foot and VCC _ BAT _ MCU signal connection, 3 feet and resistance R25 one end are connected, and the resistance R25 other end ground. One end of the resistor R37, one end of the resistor R38 and the MOS Q41 pin are interconnected, and meanwhile, the other ends of the resistor R37 and the resistor R38 are respectively connected with VCC-5V, GND.
A control circuit 3, comprising: the device comprises a processor U1 GD32F103, a MOS Q12N7002, a MOS Q32N7002, a resistor R30 and a resistor R28. The U18 pin of the processor is connected with the MOS Q11 pin, the 1 pin is connected to the ground through R28, the MOS Q12 pin is grounded, and the MOS Q13 pin is connected with the MOS Q31 pin and the MOS Q21 pin.
The battery is a standard component, and an ER14250M primary lithium sub-capacity type battery with the rated voltage of 3.6V and the capacity of 800mAh is selected. The snap switch SW1 is an external activation switch, after the snap switch SW1 is pressed, G of the MOS Q2 is at a low level, at the moment, the MOS Q2 is turned off, an enable pin of an electronic switch BL2554 of the chip U6 is changed into a high level, and a battery access is activated; after the battery access is activated, the processor U1 is powered ON, the control pin PA1, namely the BAT _ KEEP _ ON signal level, is given that the default level is low by the pull-down resistor, when the processor controls the PA1 to be high, the MOS Q1 is conducted, therefore, the BAT _ KEEP _ ON # is changed into low level, the function of the BAT _ KEEP _ ON # is equivalent to that of pressing a key, and the battery can be continuously powered without continuously pressing the snap switch. When the pin of the single chip microcomputer control PA1 is in low level, the MOS Q1 is turned off, and the state of BAT _ KEEP _ ON # level is determined by the state of the key activation and power supply priority control circuit 2 module. When the external voltage and the battery exist at the same time, the MOS Q4G is at a high level and is therefore conducted, so that VBAT _ IN _ ON is at a low level, and disconnection of a battery circuit is ensured when external power supply exists; when no external power is supplied, G of the MOS Q2 is pulled up by VBAT, so the MOS Q2 is turned ON, pin 4 of U6 is low, that is, BL2554 is not enabled at this time, SW1 is pressed, BAT _ KEEP _ ON # is low, Q2 is turned off, VBAT _ IN _ ON signal is high, U6 is turned ON at this time, the battery is activated, and the following load circuit is successfully powered ON.
Claims (4)
1. A snap-action switch activated battery-powered dual supply circuit comprising: the key activation and power supply control system comprises a DCDC circuit (1), a key activation and power supply priority control circuit (2), a control circuit (3) and a battery (4);
the DCDC circuit (1) converts external power supply into a voltage of 3.3V suitable for internal use; the key activation and power supply priority control circuit (2) is used for controlling the power supply priority and activating the power supply path of the battery (4) after the key is pressed; the control circuit (3) is used for controlling the power supply loop of the battery (4) to be continuously kept or disconnected after the key is released; the DCDC circuit (1) is used for supplying power to the outside and converting the power into VCC3D3V, the voltage and VBAT voltage of the battery (4) are input to the key activation and power supply priority control circuit (2), the key activation and power supply priority control circuit (2) selectively outputs the power supply voltage and then transmits the power supply voltage to the control circuit (3), and the control circuit (3) controls the key activation and power supply priority control circuit (2) through IO control signals after being powered on;
the snap switch SW1 is an external activation switch, after the snap switch SW1 is pressed, G of the MOS Q2 is at a low level, at the moment, the MOS Q2 is turned off, an enabling pin of an electronic switch BL2554 of the chip U6 is changed into a high level, and the battery (4) is activated; after the battery (4) is activated, the processor U1 is powered ON, the control pin PA1, namely the BAT _ KEEP _ ON signal level, is given that the default level is low by the pull-down resistor, when the processor controls the PA1 to be high level, the MOS Q1 is conducted, therefore, the BAT _ KEEP _ ON # is changed into low level, the effect of the BAT _ KEEP _ ON # is equal to that of the key press, and the battery can be continuously powered without continuously pressing the snap switch; when the pin of the single chip microcomputer control PA1 is in low level, the MOS Q1 is turned off, and the state of BAT _ KEEP _ ON # level is determined by the state of the key activation and power supply priority control circuit (2); when the external voltage and the battery exist at the same time, the MOS Q4G is conducted at a high level, so that VBAT _ IN _ ON is at a low level, and the disconnection of a battery circuit is ensured when external power supply exists; when no external power is supplied, G of the MOS Q2 is pulled up by VBAT, so the MOS Q2 is turned ON, pin 4 of U6 is low, that is, BL2554 is not enabled at this time, SW1 is pressed, BAT _ KEEP _ ON # is low, Q2 is turned off, VBAT _ IN _ ON signal is high, U6 is turned ON at this time, the battery is activated, and the following load circuit is successfully powered ON.
2. A snap-switch activated battery powered two-way power supply circuit according to claim 1, characterised in that said DCDC circuit (1) comprises: XC9881 chip U4, capacitor C37, resistor R22, resistor R26, resistor R27, resistor R31 and capacitor C39; the capacitor C37 is connected with an input pin of the chip U4, the resistor R22 and the resistor R26 are respectively connected with an enable 2 pin of the chip U4 in an interconnecting way, meanwhile, the other end of the resistor R22 is pulled up to a power supply, and the other end of the resistor R26 is connected with a digital ground; one end of the resistor R27 is connected with the feedback pin 4 of the chip U4, and the other end is grounded; one end of the resistor R31 is connected with the feedback pin 4 of the chip U4, and the other end is connected with VCC3V 3.
3. A snap-action switch-activated battery-powered two-way power supply circuit as claimed in claim 1, characterized in that said key activation and power priority control circuit (2) comprises: a chip U6 BL2554 electronic switch, a capacitor C6, a capacitor C13, a capacitor C33, a MOS Q2, a resistor R24, a diode D8, a resistor R29, a diode D6, a resistor R42, a resistor R23, a diode D5, a snap switch SW1, a MOS Q4, a resistor R37 and a resistor R38; one end of the snap switch SW1 is grounded, the other end of the snap switch SW1 is connected with a resistor R23 and the cathode of a diode D5, and the positive level of the diode D5 is grounded; the BAT _ KEEP _ ON # signal of the MOS Q21 pin is connected to the resistor R23, and at the same time, the signal is pulled up to the power sources VBAT and VCC3V3 through the resistor R42 and the resistor R29; the pin MOS Q22 is grounded, the pin MOS Q23 is VBAT _ IN _ ON, and is pulled up to VBAT through a resistor R24 and is connected with a pin U64 of the chip; a pin of the chip U65 is connected with a VBAT signal, a pin 1 is connected with an output VCC _ BAT _ MCU, and a pin 3 is grounded through a resistor R25; the resistor R37 and the resistor R38 are connected with VCC _5V and GND and are connected with voltage division, and the MOS Q41 pin is connected after voltage division.
4. A snap-switch activated battery powered two-way power supply circuit according to claim 1, characterised in that said control circuit (3) comprises: the processor U1 GD32F103, MOS Q12N7002, MOS Q32N7002, resistor R30, resistor R28; the U18 pin of the processor is connected with the MOS Q11 pin, the 1 pin is pulled down to the ground through R28, the MOS Q12 pin is grounded, and the MOS Q13 pin is connected with the MOS Q31 pin and the MOS Q21 pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111572908.6A CN114400734B (en) | 2021-12-21 | 2021-12-21 | Dual-circuit power supply circuit for activating battery power by instantaneous switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111572908.6A CN114400734B (en) | 2021-12-21 | 2021-12-21 | Dual-circuit power supply circuit for activating battery power by instantaneous switch |
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| Publication Number | Publication Date |
|---|---|
| CN114400734A true CN114400734A (en) | 2022-04-26 |
| CN114400734B CN114400734B (en) | 2024-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111572908.6A Active CN114400734B (en) | 2021-12-21 | 2021-12-21 | Dual-circuit power supply circuit for activating battery power by instantaneous switch |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199842A (en) * | 2013-03-06 | 2013-07-10 | 青岛歌尔声学科技有限公司 | Key control circuit for single-battery power supply system |
| WO2016119694A1 (en) * | 2015-01-29 | 2016-08-04 | 天地融科技股份有限公司 | Battery protection circuit, electrical energy providing device and electronic device |
| CN210640722U (en) * | 2019-11-08 | 2020-05-29 | 湖北民族大学 | Battery switch circuit and power supply management system comprising same |
| CN212115163U (en) * | 2020-04-23 | 2020-12-08 | 杭州时光机智能电子科技有限公司 | Control circuit for OEMS |
| CN112327696A (en) * | 2020-11-05 | 2021-02-05 | 歌尔科技有限公司 | Key control circuit |
| CN113507152A (en) * | 2021-07-07 | 2021-10-15 | 浙江诺尔康神经电子科技股份有限公司 | Low-power-consumption power management circuit with short-circuit protection |
-
2021
- 2021-12-21 CN CN202111572908.6A patent/CN114400734B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199842A (en) * | 2013-03-06 | 2013-07-10 | 青岛歌尔声学科技有限公司 | Key control circuit for single-battery power supply system |
| WO2016119694A1 (en) * | 2015-01-29 | 2016-08-04 | 天地融科技股份有限公司 | Battery protection circuit, electrical energy providing device and electronic device |
| CN210640722U (en) * | 2019-11-08 | 2020-05-29 | 湖北民族大学 | Battery switch circuit and power supply management system comprising same |
| CN212115163U (en) * | 2020-04-23 | 2020-12-08 | 杭州时光机智能电子科技有限公司 | Control circuit for OEMS |
| CN112327696A (en) * | 2020-11-05 | 2021-02-05 | 歌尔科技有限公司 | Key control circuit |
| CN113507152A (en) * | 2021-07-07 | 2021-10-15 | 浙江诺尔康神经电子科技股份有限公司 | Low-power-consumption power management circuit with short-circuit protection |
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| CN114400734B (en) | 2024-07-05 |
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