CN115833299A - Control circuit and electronic device - Google Patents
Control circuit and electronic device Download PDFInfo
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- CN115833299A CN115833299A CN202211346643.2A CN202211346643A CN115833299A CN 115833299 A CN115833299 A CN 115833299A CN 202211346643 A CN202211346643 A CN 202211346643A CN 115833299 A CN115833299 A CN 115833299A
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- battery cell
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- protection device
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The application discloses control circuit and electronic equipment belongs to circuit technical field, and control circuit includes: the battery cell protection device comprises a first switch device, a first protection device and a second switch device, wherein the input end of the first switch device is used for being connected with the anode of the battery cell, the first end of the first protection device is used for being connected with the anode of the battery cell, and the second end of the first protection device is connected with the enabling end of the first switch device; the switch assembly is connected with the negative electrode of the battery cell and is used for cutting off or communicating a power supply loop where the battery cell is located; and the first end of the second protection device is connected with the output end of the first switch device, and the second end of the second protection device is connected with the control end of the switch component.
Description
Technical Field
The application belongs to the technical field of circuits, and particularly relates to a control circuit and an electronic device.
Background
When the electronic equipment is stored or transported, the electronic equipment needs to be shut down so as to reduce the power consumption of the battery cell in the electronic equipment.
However, with the increasing of the period of changing the machine, the time from the production to the sale of the electronic device to the hand of the user is longer and longer, and even if the electronic device is shut down, the battery cell still consumes power with lower power consumption, and finally the voltage in the battery cell is reduced to the voltage for prohibiting charging or is lower than the voltage for prohibiting charging, so that the over-discharge of the battery cell occurs, and the service life of the battery cell is affected.
Disclosure of Invention
The embodiment of the application aims to provide a control circuit and electronic equipment, which can solve the problem that even if the electronic equipment is shut down, a battery cell is still power-consuming with lower power consumption, so that the battery cell is over-discharged.
In a first aspect, an embodiment of the present application provides a control circuit, which is used for an electronic device, where the electronic device includes a battery cell, and the control circuit includes: the battery cell protection device comprises a first switch device, a first protection device and a second switch device, wherein the input end of the first switch device is used for being connected with the anode of the battery cell, the first end of the first protection device is used for being connected with the anode of the battery cell, and the second end of the first protection device is connected with the enabling end of the first switch device; the switch assembly is connected with the negative electrode of the battery cell and is used for cutting off or communicating a power supply loop where the battery cell is located; the first end of the second protection device is connected with the output end of the first switch device, and the second end of the second protection device is connected with the control end of the switch component; under the condition that a first level signal is input to the second end of the first protection device, the first protection device is disconnected, the first switch device outputs a high level signal, and the switch assembly cuts off a power supply loop where the battery cell is located; under the condition that a second level signal is input to a second end of the second protection device, the second protection device is disconnected, and the switch assembly is communicated with a power supply loop where the battery cell is located.
In a second aspect, an embodiment of the present application provides an electronic device, including: an electric core; the control circuit according to any one of the first aspect, the control circuit is connected to the battery cell.
In the embodiment of the application, a control circuit is provided, and by setting the control circuit in the electronic device, a power supply loop where the battery cell is located can be cut off before the electronic device needs to be stored or transported, and the power supply loop where the battery cell is located is communicated after the transportation or storage is finished.
In the process, because the power supply loop where the battery cell is located is cut off in the storage or transportation process of the electronic equipment, the loss of the electric quantity in the battery cell can be reduced, and the voltage in the battery cell is reduced to the voltage which is forbidden to charge or is lower than the voltage which is forbidden to charge, so that the over-discharge condition of the battery cell occurs.
In addition, because the discharge power consumption of the battery cell is reduced, the service life of the battery cell is ensured, and meanwhile, the storage or transportation duration of the electronic equipment is prolonged, so that the requirements of transportation or storage of the electronic equipment in related technical schemes are met.
Drawings
Fig. 1 is a schematic topology diagram of a control circuit, a battery cell, and a motherboard before an electronic device enters a transportation mode in an embodiment of the present application;
fig. 2 is a schematic topology diagram among the control circuit, the battery cell, and the motherboard after the electronic device enters the transportation mode in the embodiment of the present application;
fig. 3 is a schematic topology diagram of the control circuit, the battery cell, and the motherboard after the electronic device exits the transportation mode in the embodiment of the application;
fig. 4 is a schematic topology diagram of the control circuit, the battery cell, and the motherboard before the electronic device enters the transportation mode in the embodiment of the present application;
fig. 5 is a schematic topology diagram of the control circuit, the battery cell, and the motherboard after the electronic device enters the transportation mode in the embodiment of the present application;
fig. 6 is a schematic topology diagram of the control circuit, the battery cell, and the motherboard after the electronic device exits the transportation mode in the embodiment of the application.
Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 6 is:
the battery comprises a BT battery core, a Q1 first switch device, a Q switch component, a Q2 second switch device, a Q3 third switch device, a Q4 fourth switch device, an F1 first protection device, an F2 second protection device, an R1 first resistor, an R2 second resistor, an IC battery protection chip, a D diode, a 100 mainboard, a102 key A, a 104 key B and a 106 starting switch.
Detailed Description
Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application. 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 application.
The features of the terms first and second in the description and in the claims of the present application may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specified. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The control circuit and the electronic device provided by the embodiments of the present application are implemented by specific embodiments and application scenarios thereof, which are described below with reference to the accompanying drawings.
In one embodiment, an embodiment of the present application provides a control circuit, which is used for an electronic device, where the electronic device includes a battery cell BT, and as shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, and fig. 6, the control circuit includes: the input end of the first switching device Q1 is used for being connected with the positive electrode VBAT + of the battery cell BT, the first end of the first protection device F1 is used for being connected with the positive electrode VBAT + of the battery cell BT, and the second end of the first protection device F1 is connected with the enabling end of the first switching device Q1; the switch component Q is connected with a negative electrode VBAT-of the battery cell BT and is used for cutting off or communicating a power supply loop where the battery cell BT is located; a first end of the second protection device F2 is connected with the output end of the first switch device Q1, and a second end of the second protection device F2 is connected with the control end of the switch component Q; under the condition that a first level signal is input to the second end of the first protection device F1, the first protection device F1 is disconnected, the first switch device Q1 outputs a high level signal, and the switch component Q cuts off a power supply loop where the battery cell BT is located; under the condition that a second level signal is input to the second end of the second protection device F2, the second protection device F2 is disconnected, and the switching component Q is connected to a power supply loop where the battery cell BT is located.
In one embodiment, a power supply loop of the battery cell BT, that is, a discharge loop of the battery cell BT, may be understood as a loop that is connected to and forms a positive electrode VBAT + of the battery cell BT and a negative electrode VBAT-of the battery cell BT, and in the power supply loop, the battery cell BT can provide electric energy to a device located in the power supply loop, so as to enable the device located in the power supply loop to run electrically.
In the above embodiment, after the input end of the first switching device Q1 is connected to the positive electrode VBAT + of the battery cell BT, the voltage output by the positive electrode VBAT + can be used as an input to the first switching device Q1, where in a case where a non-first level signal (e.g., a high level signal) is input to the enable end of the first switching device Q1, the first switching device Q1 is in an off state (i.e., the voltage output by the output end thereof is 0 volt), and in a case where the first level signal is input to the enable end of the first switching device Q1, the first switching device Q1 is in an on state, and the high level signal is output by the output end of the first switching device Q1, i.e., the power supply voltage of the battery cell BT.
Based on this, when the first level signal is input to the second end of the first protection device F1, the voltage difference between the first end and the second end of the first protection device F1 is large (for example, the difference between the power supply voltage of the battery cell BT and the first level signal), and when the voltage difference is applied to the first protection device F1, the first protection device F1 is turned off, so that the enable end of the first switching device Q1 is turned off from the positive electrode VBAT + of the battery cell BT. At this time, the first switching device Q1 is in a conducting state, the output end of the first switching device Q outputs a high-level signal, and the switching component Q cuts off a power supply loop where the battery cell BT is located under the action of the high-level signal, so that the battery cell BT cannot output electric energy.
In this embodiment, the input of the first level signal to the second terminal of the first protection device F1 may occur during a factory stage of the electronic device, so as to facilitate storage and transportation of the electronic device.
And under the condition that the second end of the second protection device F2 inputs the second level signal, the voltage difference between the first end and the second end of the second protection device F2 is large (for example, the difference value between the power supply voltage of the battery cell BT and the second level signal), and when the voltage difference is applied to the second protection device F2, the second protection device F2 is disconnected, so that the output end of the first switch device Q1 is disconnected from the control end of the switch component Q, the switch component Q is connected to the power supply loop where the battery cell BT is located, and the battery cell BT can output electric energy.
In one of the embodiments, the first protection device F1 and the second protection device F2 are overcurrent protection devices, wherein the overcurrent protection devices, as can be understood, are open in the event of a current flowing through the devices exceeding their rated current value.
In one embodiment, the over-current protection device is a fuse or an air switch.
Specifically, if the first protection device F1 is a first fuse and the second protection device F2 is a second fuse, the first fuse is burned out under the condition that the second end of the first fuse inputs the first level signal, the first switching device Q1 outputs a high level signal, and the switching component Q cuts off a power supply loop where the battery cell BT is located; under the condition that a second level signal is input to a second end of the second fuse, the second fuse is burnt, and the switching component Q is communicated with a power supply loop where the battery cell BT is located.
In this embodiment, the input of the second level signal at the second terminal of the second protection device F2 may occur during an activation phase of the electronic device, wherein the activation phase may be understood as a first power-on after the electronic device is sold to the user.
In one embodiment, the first level signal and the second level signal may be the same level signal, and in particular, may be a low level signal (such as ground).
In this embodiment, by providing the control circuit in the electronic device, before the electronic device needs to be stored or transported, the power supply loop in which the battery cell BT is located can be cut off, and after the transportation or storage is finished, the power supply loop in which the battery cell BT is located can be connected.
In the process, because the power supply loop where the battery cell BT is located is cut off in the storage or transportation process of the electronic equipment, the loss of the electric quantity in the battery cell BT can be reduced, and the situation that the voltage in the battery cell BT is reduced to the voltage which is forbidden to be charged or is lower than the voltage which is forbidden to be charged, so that the battery cell BT is overdischarged is reduced.
In addition, because the discharge power consumption of the battery cell BT is reduced, the storage or transportation time of the electronic equipment is prolonged while the service life of the battery cell BT is ensured, so that the requirements of transportation or storage of the electronic equipment in the related technical scheme are met.
In one embodiment, the control circuit further comprises: the first end of the first resistor R1 is connected with the second end of the first protection device F1, and the second end of the first resistor R1 is grounded.
In this embodiment, the first resistor R1 is provided to pull down the voltage of the enable terminal of the first switching device Q1 and ground after the first protection device F1 is turned off, so that the first switching device Q1 is maintained in the on state.
In the process, the voltage of the enabling end of the first switching device Q1 is pulled down and grounded by the first resistor R1, and a first level signal does not need to be continuously input to the second end of the first protection device F1, so that the current state of the control circuit is conveniently maintained.
In one embodiment, the control circuit further comprises: and a first end of the second resistor R2 is connected with a second end of the second protection device F2, and a second end of the second resistor R2 is grounded.
In this embodiment, after the second protection device F2 is disconnected, the set second resistor R2 can keep the switch component Q in the current state, that is, keep the switch component Q connected to the power supply loop where the battery cell BT is located, and in this process, a second level signal does not need to be continuously input to the second end of the second protection device F2, so that the reliability of the control circuit is ensured.
In one embodiment, the switching component Q comprises: a battery protection chip IC; a first end of the second switching device Q2 is connected with a cathode VBAT-of the battery core BT, and a control end of the second switching device Q2 is connected with the battery protection chip IC; a first end of the third switching device Q3 is connected with the battery protection chip IC, and a control end of the third switching device Q3 is connected with a second end of the second protection device F2; and the fourth switching device Q4 is located in a power supply loop of the battery cell BT, the fourth switching device Q4 is connected with the second end of the second switching device Q2, and the control end of the fourth switching device Q4 is connected with the second end of the third switching device Q3.
In this embodiment, a specific configuration of the switching assembly Q is specifically defined, and in this embodiment, since the third switching device Q3 is located between the battery protection chip IC and the fourth switching device Q4, the on or off of the third switching device Q3 affects the control of the battery protection chip IC on the fourth switching device Q4, and the fourth switching device Q4 is simultaneously in an off state when the third switching device Q3 is in an off state. Therefore, when a power supply loop where the battery cell BT is located is cut off, the fourth switching device Q4 does not work any more, so that the power consumption of the battery cell BT when the fourth switching device Q4 is maintained to operate is reduced, and a foundation is provided for prolonging the service life of the battery cell BT.
In one embodiment, the control circuit further comprises: and the anode of the diode D is connected with the second end of the second protection device F2, and the cathode of the diode D is used for receiving a second level signal.
In this embodiment, as can be seen from the above, when the second end of the second protection device F2 receives that the second level signal is a low level signal, the diode D is turned on based on the fact that the diode D has the single-phase conduction characteristic, the second protection device F2 is turned off, and the switch assembly Q is connected to the loop where the battery cell BT is located.
In one embodiment, the cathode of the diode D is grounded through the power-on button.
In this embodiment, when the power-on button is pressed, the cathode of the diode D receives the low-level signal, and in a normal case, the electronic device uses the received low-level signal as the power-on signal, and the diode D is arranged, so that the probability that the second protection device F2 and the third switching device Q3 are abnormal when the electronic device uses the high-level signal as the power-on signal is avoided, thereby improving the reliability of the control circuit.
In one embodiment, the electronic device is considered to be operated in a transportation mode (shipmode) when the switching component Q cuts off the power supply loop in which the battery cell BT is located, whereas the electronic device is considered to be exited from the transportation mode when the switching component Q connects to the power supply loop in which the battery cell BT is located.
Based on this, fig. 1 is a schematic topology diagram among the control circuit, the battery cell BT and the main board 100 before the electronic device enters the transportation mode in this embodiment. As shown in fig. 1, a first level signal is input to the second end of the first protection device F1 through the GPIO terminal, and the electronic device enters a transportation mode, where fig. 2 is a topology diagram between the control circuit, the battery cell BT, and the motherboard 100 after the electronic device enters the transportation mode in the embodiment of the present application, and as shown in fig. 2, the first protection device F1 is disconnected because the first level signal is input to the second end of the first protection device F1 through the GPIO terminal.
Fig. 3 is a schematic topology diagram of the control circuit, the battery cell BT and the main board 100 after the electronic device exits the transportation mode in the embodiment of the application, and as shown in fig. 3, when a second level signal is input to the second end of the second protection device F2, the second protection device F2 is disconnected.
In one embodiment, the present application provides an electronic apparatus, where the electronic apparatus includes a battery cell BT and a control circuit as in any of the above embodiments, and the control circuit is connected to the battery cell BT.
In this embodiment, the proposed electronic device includes the battery cell BT and the control circuit, so that the electronic device has all the beneficial technical effects of the control circuit, and details are not repeated herein.
In one embodiment, as shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, and fig. 6, the electronic device further includes: the main board 100, the main board 100 is connected with the positive electrode VBAT + of the battery cell BT and the switch component Q; the main board 100 is configured to provide a first level signal to the control circuit.
In this embodiment, it is specifically defined that the electronic device further includes a main board 100. The main board 100 is connected to the positive electrode VBAT + of the battery cell BT and the switch component Q, so as to take electricity from the battery cell BT. The main board 100 is connected to the negative electrode VBAT of the battery cell BT through the switch component Q, and it can be understood that the main board 100 is located in a power supply loop of the battery cell BT, based on which, the switch component Q can control whether the battery cell BT supplies power to the main board 100, and the main board 100 can provide a first level signal to the control circuit, so that the first level signal can be sent to the control circuit through the main board 100, so that the control circuit can cut off the power supply loop where the battery cell BT is located, and simultaneously cut off the power supply from the battery cell BT to the main board 100, so as to reduce the influence of the main board 100 on the power consumption of the battery cell BT.
In one embodiment, the main control chip is integrated on the main board 100, wherein a user of the main control chip receives an input from a user and inputs a first level signal to the control circuit in response to the input from the user.
Specifically, the main board 100 inputs the first level signal to the second terminal of the first protection device F1 through the GPIO terminal.
In one embodiment, the main board 100 further includes: the main board 100 is configured to provide a first level signal to the control circuit when the state of the at least two keys is a preset state.
In this embodiment, a triggering manner of the first level signal is given, where the states of at least two keys are preset states, which can be understood as a combined trigger. The preset state can be that at least two keys are pressed simultaneously or at least two keys are pressed according to a preset pressing sequence so as to realize the triggering of the first level signal.
In one embodiment, the at least two keys may be physical keys, virtual keys, or a combination of physical keys and virtual keys, which are not described herein again.
Specifically, fig. 4 is a schematic topology diagram of the control circuit, the battery cell BT, and the main board 100 before the electronic device enters the transportation mode in the embodiment of the present application. As shown in fig. 4, a first level signal is input to the second end of the first protection device F1 through at least two keys (including a key a102 and a key B104), and the electronic device enters a transportation mode, where fig. 5 is a schematic topology diagram among the control circuit, the battery cell BT and the main board 100 after the electronic device enters the transportation mode in the embodiment of the present application, and as shown in fig. 5, the first protection device F1 is disconnected because the first level signal is input to the second end of the first protection device F1 through at least two keys.
Fig. 6 is a schematic topology diagram of the control circuit, the battery cell BT and the main board 100 after the electronic device exits from the transportation mode in the embodiment of the application, and as shown in fig. 6, when a second level signal is input to the second end of the second protection device F2, the second protection device F2 is turned off.
In one embodiment, the at least two keys comprise: a volume up key and a volume down key.
In one embodiment, as shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, and fig. 6, the main board 100 further includes: and one end of the starting switch 106 is grounded, the other end of the starting switch 106 is connected with the control circuit, and when the starting switch 106 is in a closed state, the starting switch 106 provides a second level signal to the control circuit.
In this embodiment, a triggering manner of the second level signal is specifically given, and in this embodiment, triggering of the second level signal is linked to the power-on switch 106 of the electronic device, so that the user can press the power-on switch 106, and at the same time of starting the electronic device, the cell BT is wakened up. In the process, the user does not need to operate the electronic equipment independently to wake up the battery cell BT, so that the operation of waking up the battery cell BT is simplified while the use habit of using the electronic equipment when the user starts the machine is not changed.
In one embodiment, the power-on switch 106 may be understood as a power-on button, and when the power-on button is pressed, the power-on switch 106 is in a closed state.
In one embodiment, the electronic device may be a terminal, or may be a device other than a terminal. The electronic Device may be, for example, a Mobile phone, a tablet computer, a notebook computer, a palm top computer, a vehicle-mounted electronic Device, a Mobile Internet Device (MID), an Augmented Reality (AR)/Virtual Reality (VR) Device, a robot, a wearable Device, an ultra-Mobile personal computer (UMPC), a netbook or a Personal Digital Assistant (PDA), and the like, and may also be a server, a Network Attached Storage (Network Attached Storage, NAS), a personal computer (NAS), a Television (TV), a teller machine, a self-service machine, and the like, and the embodiments of the present application are not limited in particular.
In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A control circuit for an electronic device, wherein the electronic device includes a battery cell, the control circuit comprising:
a first switching device, an input end of which is used for being connected with the anode of the battery cell,
a first end of the first protection device is used for being connected with the anode of the battery cell, and a second end of the first protection device is connected with an enabling end of the first switch device;
the switch assembly is connected with the negative electrode of the battery cell and is used for cutting off or communicating a power supply loop where the battery cell is located;
a first end of the second protection device is connected with the output end of the first switch device, and a second end of the second protection device is connected with the control end of the switch component;
under the condition that a first level signal is input to the second end of the first protection device, the first protection device is disconnected, the first switch device outputs a high level signal, and the switch assembly cuts off a power supply loop where the battery core is located; and under the condition that a second level signal is input to a second end of the second protection device, the second protection device is disconnected, and the switch assembly is communicated with a power supply loop where the battery core is located.
2. The control circuit of claim 1, further comprising:
and a first end of the first resistor is connected with a second end of the first protection device, and a second end of the first resistor is grounded.
3. The control circuit of claim 1, further comprising:
and a first end of the second resistor is connected with a second end of the second protection device, and a second end of the second resistor is grounded.
4. The control circuit of claim 1, wherein the switching assembly comprises:
a battery protection chip;
a first end of the second switching device is connected with the negative electrode of the battery core, and a control end of the second switching device is connected with the battery protection chip;
a first end of the third switching device is connected with the battery cell protection chip, and a control end of the third switching device is connected with a second end of the second protection device;
and the fourth switching device is positioned in a power supply loop of the battery core, a first end of the fourth switching device is connected with a second end of the second switching device, and a control end of the fourth switching device is connected with a second end of the third switching device.
5. The control circuit of any one of claims 1 to 4, further comprising:
and the anode of the diode is connected with the second end of the second protection device, and the cathode of the diode is used for receiving the second level signal.
6. An electronic device, comprising:
an electric core;
the control circuit of any of claims 1-5, connected with the cells.
7. The electronic device of claim 6, further comprising:
the main board is connected with the positive electrode of the battery cell and the switch assembly;
the main board is used for providing a first level signal for the control circuit.
8. The electronic device of claim 7, wherein the motherboard further comprises:
the mainboard is used for providing a first level signal for the control circuit when the states of the at least two keys are preset states.
9. The electronic device of claim 8, wherein the at least two keys comprise:
a volume up key and a volume down key.
10. The electronic device of claim 7, wherein the motherboard further comprises:
and one end of the starting switch is grounded, the other end of the starting switch is connected with the control circuit, and when the starting switch is in a closed state, the starting switch provides a second level signal for the control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211346643.2A CN115833299A (en) | 2022-10-31 | 2022-10-31 | Control circuit and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211346643.2A CN115833299A (en) | 2022-10-31 | 2022-10-31 | Control circuit and electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115833299A true CN115833299A (en) | 2023-03-21 |
Family
ID=85525893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211346643.2A Pending CN115833299A (en) | 2022-10-31 | 2022-10-31 | Control circuit and electronic device |
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| Country | Link |
|---|---|
| CN (1) | CN115833299A (en) |
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2022
- 2022-10-31 CN CN202211346643.2A patent/CN115833299A/en active Pending
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