CN114400734B - Dual-circuit power supply circuit for activating battery power by instantaneous switch - Google Patents
Dual-circuit power supply circuit for activating battery power by instantaneous switch Download PDFInfo
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- CN114400734B CN114400734B CN202111572908.6A CN202111572908A CN114400734B CN 114400734 B CN114400734 B CN 114400734B CN 202111572908 A CN202111572908 A CN 202111572908A CN 114400734 B CN114400734 B CN 114400734B
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- 230000003213 activating effect Effects 0.000 title claims abstract description 9
- 230000004913 activation Effects 0.000 claims abstract description 31
- 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 18
- 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
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention discloses a double-circuit power supply circuit for activating battery power by a snap switch, which comprises: the device comprises a DCDC circuit (1), a key activation and power supply priority control circuit (2), a control circuit (3) and a battery (4); the external power supply priority is realized by ingenious connection of the MOS tube, the resistor and the diode discrete device, the battery loop can be activated by the instantaneous switch, and the telephone on the singlechip can rapidly take over the function of continuously activating the battery path by the switch. The circuit is simple and ingenious, is built by using a simple discrete device, has high reliability, and only M European-level resistor generates mu A-level current loss in a shutdown state.
Description
Technical Field
The invention relates to a power supply circuit, in particular to a double-circuit power supply circuit powered by a snap switch activation battery.
Technical Field
In the field of electronic circuits, electronic devices are usually equipped with two power supply modes, i.e., battery and external power supply, and the external power supply has a high priority, and when a momentary switch is pressed, the battery power supply circuit is required to be activated and the battery power supply circuit is required to be cut off as required. The traditional circuit consists of a key control chip, a power chip and a power selection chip, and has the defects that the key chip is required to be always in a working state, the power consumption is relatively larger, the equipment cannot be stored for a long time, a plurality of special chips are required besides a processor, the complexity is high, and for certain specific occasions, part of chips are not allowed to still work in a shutdown state.
Disclosure of Invention
The invention aims to provide a double-circuit power supply circuit for activating battery power by a snap switch, which solves the problems that a chip still needs to be in a working state in a shutdown state and has higher complexity.
A snap switch activated battery powered two-way power supply circuit comprising: the device comprises a DCDC circuit, a battery, a key activation and power supply priority control circuit and a 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 to 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 channel of the battery after the key is pressed; the control circuit is used for controlling the battery power supply loop to keep or break after the key is released. The DCDC circuit is used for supplying power to the outside, converting the DCDC circuit into VCC3D3V, and inputting the VCC 3V and the VBAT voltage of the battery to the key activation and power supply priority control circuit, wherein the key activation and power supply priority control circuit is used for selecting and outputting the power supply voltage and then transmitting the power supply voltage to the control circuit, and the control circuit module is used for controlling the key activation and power supply priority control circuit through an IO control signal after being electrified.
DCDC circuit, comprising: 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, one end of the resistor R22, one end of the resistor R26 and an enabling 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 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 VCC3V3.
The key activation and power supply priority control circuit comprises: chip U6 BL2554 electronic switch, capacitor C6, capacitor C13, capacitor C33, MOS Q2, resistor R24, diode D8, resistor R29, diode D6, resistor R42, resistor R23, diode D5, snap switch SW1, MOS Q4, resistor R37 and resistor R38. One end of the instantaneous switch SW1 is grounded, the other end of the instantaneous switch SW1, one end of the resistor R23 and the negative electrode of the diode D5 are connected, and the positive stage of the diode D5 is grounded; the MOS Q2 1 pin BAT_KEEP_ON# signal is connected with the other end of the resistor R23, and simultaneously the resistor R42 and the resistor R29 are connected, and the other ends of the resistor R42 and the resistor R29 are respectively connected to VBAT and VCC3V3. The MOS Q22 pin is grounded, the MOS Q23 pin signal is VBAT_IN_ON, and the resistor R24 is connected to the VBAT signal and is connected with the U64 pin of the chip; the U65 pin of the chip is connected with a VBAT signal, the 1 pin is connected with a VCC_BAT_MCU signal, the 3 pin is connected with one end of a resistor R25, and the other end of the resistor R25 is grounded. One end of the resistor R37, one end of the resistor R38 and the MOS Q41 are connected with each other, and meanwhile, the other ends of the resistor R37 and the resistor R38 are respectively connected with the VCC_5V, GND.
A control circuit, comprising: the processor U1 GD32F103, the MOS Q12N7002, the MOS Q32N7002, the resistor R30 and the resistor R28. The processor U18 pin is connected with the MOS Q11 pin, the 1 pin is connected to the ground through the 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 battery is selected, wherein the rated voltage is 3.6V, and the capacity is 800mAh.
The instantaneous switch SW1 is an external activating switch, after the instantaneous switch SW1 is pressed, the G of the MOS Q2 is in a low level, at the moment, the MOS Q2 is turned off, the enabling pin of the chip U6 electronic switch BL2554 is in a high level, and the battery is activated; after the battery is activated, the processor U1 is electrified, the control pin PA1, namely the BAT_KEEP_ON signal level, is set to be low by a pull-down resistor, when the processor controls PA1 to be high, the MOS Q1 is conducted, so that the BAT_KEEP_ON# becomes low, the action is equivalent to the key pressing, and the continuous power supply of the battery can be realized without continuously pressing a snap switch. When the singlechip controls the PA1 pin to be at a low level, the MOS Q1 is turned off, and the state of the 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 when external power supply exists is ensured; when no external power is supplied, G of the MOS Q2 is pulled up by VBAT, so that the MOS Q2 is turned ON, pin 4 of U6 is low, that is, BL2554 is not enabled at this time, SW1 is pressed down, bat_keep_on# is low, Q2 is turned off, vbat_in_on signal is high, U6 is turned ON, the battery is activated, and the load circuit is successfully powered up at the later time.
The circuit is simple and ingenious, is built by utilizing a simple discrete device, has high reliability, and only M European-level resistor generates mu A-level current loss in a shutdown state. The external power supply priority can be realized, a battery loop can be activated through the instantaneous switch, the telephone on the singlechip can rapidly take over the switch to continue to activate the battery path, and other circuits started through the instantaneous switch are all in the power-on working state of partial circuits; the battery activation loop power down can be flexibly controlled according to the application of the processor.
Drawings
FIG. 1 is a schematic diagram of a two-way power supply circuit for a snap switch to activate battery power;
FIG. 2 is a schematic diagram of an external power DCDC circuit of a snap-action switch activated battery powered two-way power supply circuit;
FIG. 3 is a schematic diagram of a key activation and power priority control circuit of a snap switch activation battery powered two-way power supply circuit;
Fig. 4 is a schematic diagram of a control circuit for a snap switch activated battery powered two-way power supply circuit.
DCDC circuit 2, key activation and power supply priority control circuit 3, control circuit 4 and battery
Detailed Description
A snap switch activated battery powered two-way power 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 the power supply path of the battery 4 after the key is pressed, and controlling the DCDC circuit to have the highest priority; the control circuit 3 is used for controlling the battery 4 to keep or disconnect after the key is released. The DCDC circuit 1 is input into external power supply, is converted into VCC3D3V, and is input into the key activation and power supply priority control circuit 2 together with the voltage of the battery 4, the key activation and power supply priority control circuit 2 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 to open a power supply path of the battery 4 through an IO control signal after power is applied.
DCDC circuit 1, comprising: 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, one end of the resistor R22, one end of the resistor R26 and an enabling 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 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 VCC3V3.
The key activation and power supply priority control circuit 2 includes: chip U6 BL2554 electronic switch, capacitor C6, capacitor C13, capacitor C33, MOS Q2, resistor R24, diode D8, resistor R29, diode D6, resistor R42, resistor R23, diode D5, snap switch SW1, MOS Q4, resistor R37 and resistor R38. One end of the instantaneous switch SW1 is grounded, the other end of the instantaneous switch SW1, one end of the resistor R23 and the negative electrode of the diode D5 are connected, and the positive stage of the diode D5 is grounded; the MOS Q2 1 pin BAT_KEEP_ON# signal is connected with the other end of the resistor R23, and simultaneously the resistor R42 and the resistor R29 are connected, and the other ends of the resistor R42 and the resistor R29 are respectively connected to VBAT and VCC3V3. The MOS Q22 pin is grounded, the MOS Q23 pin signal is VBAT_IN_ON, and the resistor R24 is connected to the VBAT signal and is connected with the U64 pin of the chip; the U65 pin of the chip is connected with a VBAT signal, the 1 pin is connected with a VCC_BAT_MCU signal, the 3 pin is connected with one end of a resistor R25, and the other end of the resistor R25 is grounded. One end of the resistor R37, one end of the resistor R38 and the MOS Q41 are connected with each other, and meanwhile, the other ends of the resistor R37 and the resistor R38 are respectively connected with the VCC_5V, GND.
The control circuit 3 includes: the processor U1 GD32F103, the MOS Q12N7002, the MOS Q32N7002, the resistor R30 and the resistor R28. The processor U18 pin is connected with the MOS Q11 pin, the 1 pin is connected to the ground through the 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 battery with rated voltage of 3.6V and capacity of 800mAh is selected. The snap switch SW1 is an external activation switch, after the snap switch SW1 is pressed, the G of the MOS Q2 is low level, at the moment, the MOS Q2 is turned off, the enabling pin of the chip U6 electronic switch BL2554 is changed into high level, and the battery access is activated; after the battery access is activated, the processor U1 is electrified, the control pin PA1, namely the BAT_KEEP_ON signal level, is set to be low by a pull-down resistor, when the processor controls PA1 to be high, the MOS Q1 is conducted, so that the BAT_KEEP_ON# becomes low, the action is equivalent to the key pressing, and the continuous power supply of the battery can be realized without continuously pressing a snap switch. When the singlechip controls the PA1 pin to be at a low level, the MOS Q1 is turned off, and the state of the 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 high-level and is conducted, so that VBAT_IN_ON is low-level, and the disconnection of a battery circuit when external power is supplied is ensured; when no external power is supplied, G of the MOS Q2 is pulled up by VBAT, so that the MOS Q2 is turned ON, pin 4 of U6 is low, that is, BL2554 is not enabled at this time, SW1 is pressed down, bat_keep_on# is low, Q2 is turned off, vbat_in_on signal is high, U6 is turned ON, the battery is activated, and the load circuit is successfully powered up at the later time.
Claims (1)
1. A snap switch activated battery powered two-way power supply circuit comprising: the device 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 voltage 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 a power supply passage 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 maintained or disconnected after the key is released; the DCDC circuit (1) is used for supplying power externally, converting the power into VCC3V3, and inputting the VCC3V3 and the VBAT voltage of the battery (4) to the key activation and power supply priority control circuit (2), wherein the key activation and power supply priority control circuit (2) is used for selectively outputting the power supply voltage and then transmitting the power supply voltage to the control circuit (3), and the control circuit (3) is used for controlling the key activation and power supply priority control circuit (2) through an IO control signal after being electrified;
The snap switch SW1 is an external activation switch, after the snap switch SW1 is pressed, the G of the MOS Q2 is in a low level, at the moment, the MOS Q2 is turned off, the enabling pin of the electronic switch BL2554 of the chip U6 becomes in a high level, and the battery (4) is activated; after the battery (4) is activated, the processor U1 is electrified, the control pin PA1 is the BAT_KEEP_ON signal level, the default level is low by the pull-down resistor, when the processor controls the PA1 to be high, the MOS Q1 is conducted, so that the BAT_KEEP_ON# becomes low, the action is equivalent to the key pressing, and the continuous power supply of the battery can be realized without continuously pressing the snap switch; when the singlechip controls the PA1 pin to be at a low level, the MOS Q1 is turned off, and the state of the 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 when external power supply exists is ensured; when no external power is supplied, G of the MOS Q2 is pulled up by VBAT, so that the MOS Q2 is conducted, the 4 th pin of the U6 is low level, namely BL2554 is not enabled at the moment, SW1 is pressed down, BAT_KEEP_ON# is low level, Q2 is turned off, the VBAT_IN_ON signal is high level, U6 is conducted, the battery is activated, the following load circuit is successfully electrified,
Wherein the 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 enabling 2 nd 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 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 VCC3V3;
The key activation and power supply priority control circuit (2) comprises: chip U6 BL2554 electronic switch, capacitor C6, capacitor C13, capacitor C33, MOS Q2, resistor R24, diode D8, resistor R29, diode D6, resistor R42, resistor R23, diode D5, snap switch SW1, MOS Q4, resistor R37 and resistor R38; one end of the instantaneous switch SW1 is grounded, the other end of the instantaneous switch SW is connected with a resistor R23 and the negative electrode of the diode D5, and the positive stage of the diode D5 is grounded; the BAT_KEEP_ON# signal of the 1 st pin of the MOS Q2 is connected with a resistor R23, and the signal is pulled up to the power supplies VBAT and VCC3V3 through a resistor R42 and a resistor R29; the 2 nd pin of the MOS Q2 is grounded, the 3 rd pin of the MOS Q2 is VBAT_IN_ON, and the signal is pulled up to VBAT through a resistor R24 and is connected with the 4 th pin of the chip U6; the 5 th pin of the chip U6 is connected with a VBAT signal, the 1 st pin is connected with an output VCC_BAT_MCU, and the 3 rd pin is grounded through a resistor R25; the resistor R37 and the resistor R38 are connected with VCC_5V and GND and are connected with each other for dividing voltage, and the divided voltage is connected with the 1 st pin of the MOS Q4; and
The control circuit (3) comprises: processor U1 GD32F103, MOS Q1 2N7002, MOS Q3 2N7002, resistor R30, resistor R28; the 8 th pin of the processor U1 is connected with the 1 st pin of the MOS Q1, the 1 st pin is pulled down to the ground through the R28, the 2 nd pin of the MOS Q1 is grounded, and the 3 rd pin of the MOS Q1 is connected with the 1 st pin of the MOS Q3 and the 1 st pin of the MOS Q2.
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 |
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| 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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| CN114400734A CN114400734A (en) | 2022-04-26 |
| CN114400734B true 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 (2)
| 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 |
| CN112327696A (en) * | 2020-11-05 | 2021-02-05 | 歌尔科技有限公司 | Key control circuit |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104600676B (en) * | 2015-01-29 | 2018-02-16 | 天地融科技股份有限公司 | Battery protecting circuit, electric energy provide device and electronic installation |
| 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 |
| 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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2021
- 2021-12-21 CN CN202111572908.6A patent/CN114400734B/en active Active
Patent Citations (2)
| 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 |
| CN112327696A (en) * | 2020-11-05 | 2021-02-05 | 歌尔科技有限公司 | Key control circuit |
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| CN114400734A (en) | 2022-04-26 |
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