CN117748691B

CN117748691B - Resume power supply circuit, battery control module and electronic equipment

Info

Publication number: CN117748691B
Application number: CN202410185859.8A
Authority: CN
Inventors: 秦恒亮; 杨玉龙
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2024-02-20
Filing date: 2024-02-20
Publication date: 2024-07-05
Anticipated expiration: 2044-02-20
Also published as: CN117748691A

Abstract

The application discloses a recovery power supply circuit, a battery control module and electronic equipment, and relates to the technical field of electronic equipment, wherein the recovery power supply circuit comprises a power key enabling module, a first user operation and a second user operation, wherein the power key enabling module is configured to enable a voltage reduction device to be re-enabled and restore power supply to the control device when the voltage reduction device is in a locking state and the power key is turned on again in response to the first user operation; and the power supply powering-on module is configured to enable the voltage reduction device to be powered on again and restore power supply to the control device when the voltage reduction device is in a locking state and the electronic equipment is re-connected to an external power supply in response to a second user operation. Based on the scheme of the application, the voltage reduction device is enabled again or electrified again and power supply to the control device is restored by the re-conduction of the power key or the re-access of the electronic equipment to the external power supply, so that a user can solve the problem by himself through simple operation without sending the electronic equipment to overhaul, and the user experience is effectively improved.

Description

Resume power supply circuit, battery control module and electronic equipment

Technical Field

The application relates to the technical field of electronic equipment, in particular to a recovery power supply circuit, a battery control module and electronic equipment.

Background

In order to enable a personal computer (personal computer, PC) to perform functions in some power-off scenarios, such as displaying power after power-off, opening a cover, and powering on, an Embedded Controller (EC) in the personal computer is generally required to be in a power-on state after the personal computer is powered off.

Currently, embedded controllers generally use buck (buck) devices to supply power to maintain the power-on state of the embedded controller. However, when the step-down device is in an over-current, over-voltage or over-temperature abnormal protection, the step-down device is easy to enter a locking state, and cannot continuously supply power to the embedded controller, so that the embedded controller cannot realize the function in a shutdown scene when powered down, and a user can only send the personal computer to after-sales maintenance, so that the step-down device can recover power supply, and the user experience is affected.

Therefore, a new solution is needed to solve the above-mentioned problems.

Disclosure of Invention

The application provides a power restoration circuit, a battery control module and electronic equipment, wherein a voltage reduction device is enabled again or electrified again by a mode of re-conducting a power key or re-accessing an external power supply, so that power is continuously supplied to the control device, normal use of the electronic equipment is ensured, and user experience is effectively improved.

In order to achieve the above purpose, the application adopts the following technical scheme:

in a first aspect, a power restoration circuit is provided, and the power restoration circuit is applicable to electronic equipment comprising a power key, wherein the electronic equipment comprises a voltage reduction device and a control device, and comprises a power key enabling module and/or a power supply powering-on module; the power key enabling module is respectively and electrically connected with the voltage reducing device and the control device and is configured to enable the voltage reducing device to be enabled again and restore power supply to the control device when the voltage reducing device is in a locking state and the power key is turned on again in response to first user operation; the power supply electrifying module is respectively and electrically connected with the voltage reducing device and the control device and is configured to enable the voltage reducing device to be electrified again and restore to supply power to the control device when the voltage reducing device is in a locking state and the electronic equipment is accessed to an external power supply again in response to a second user operation.

In the embodiment of the application, when the power key enabling module is adopted to recover the power supply function of the voltage reduction device and the voltage reduction device is abnormally protected to enter the locking state, the power key enables the voltage reduction device to be re-enabled and recover to supply power to the control device in a mode of responding to the first user operation. When the power supply function of the voltage reduction device is recovered by adopting the power supply power-up module, and after the abnormal protection of the voltage reduction device enters a locking state, the electronic equipment can respond to the mode of second user operation, so that the voltage reduction device is electrified again and power supply to the control device is recovered, normal use of the electronic equipment is ensured, the problem can be automatically solved by a user through simple operation, the electronic equipment is not required to be sent to be overhauled, and the user experience is effectively improved.

Illustratively, the buck device may be the buck device of fig. 4 and the control device may be the EC device of fig. 4.

With reference to the first aspect, in certain implementations of the first aspect, the first user operation includes an operation of a user pressing a power key, and the second user operation includes a user reinserting the adapter for the electronic device.

In this implementation, when the voltage step-down device is in the locked state, the power key may be turned back on in response to a user pressing the power key, thereby enabling the voltage step-down device to be re-enabled and restoring power to the control device. Alternatively, the step-down device may be powered up again and power to the control device restored in response to a user reinserting the adapter into the electronic device.

When the user reinserts the adapter into the electronic device, one end of the adapter is connected to the electronic device, and the other end of the adapter is connected to the power supply, that is, the external power supply is connected to the electronic device again, so that the pressure reducing device is re-enabled and power supply to the control device is restored.

With reference to the first aspect, in certain implementation manners of the first aspect, the power key enabling module includes a first MOS transistor, a second MOS transistor, and a first resistor; the grid electrode of the first MOS tube is electrically connected with a first power pin of the voltage reduction device, the source electrode of the first MOS tube is grounded, the drain electrode of the first MOS tube is respectively connected with the grid electrode of the second MOS tube and one end of the first resistor, the other end of the first resistor is connected with a system power supply, the drain electrode of the second MOS tube is electrically connected with an enabling pin of the voltage reduction device, the source electrode of the second MOS tube is respectively connected with the control device and one end of the power key, and the other end of the power key is grounded.

In this implementation, the system power is prevented from directly accessing the circuit by the first resistor. The voltage reducing device is connected and disconnected with the control device and the power key through the connection and disconnection of the first MOS tube and the second MOS tube, so that the voltage reducing device is enabled again through the power key, and power supply to the control device is recovered.

Illustratively, the first MOS transistor may be Q1 in fig. 7 to 9, the second MOS transistor may be Q2 in fig. 7 to 9, and the first resistor may be R1 in fig. 7 to 9.

With reference to the first aspect, the power key enabling module further includes a second resistor; the second resistor is connected between the grid electrode of the first MOS tube and the first power supply pin of the voltage reduction device.

In the implementation mode, the second resistor is used as a protection resistor to prevent the grid electrode of the second MOS tube from being connected with excessive voltage to influence the work of the second MOS tube.

Illustratively, the second resistance may be R2 in fig. 8-9.

With reference to the first aspect, the power key enabling module further includes a first diode; the positive electrode of the first diode is electrically connected with the control device, and the negative electrode of the first diode is electrically connected with the source electrode of the second MOS tube.

In this implementation, the influence of the control device on the restoration power supply circuit of the present application is prevented by the first diode.

Illustratively, the first diode may be D1 in fig. 9.

With reference to the first aspect, the power key enabling module further includes a third resistor; one end of the third resistor is electrically connected with one end of the power key, and the other end of the third resistor is electrically connected with the first power pin of the voltage reduction device.

In this implementation, the third resistor is used as a pull-up resistor, and the input voltage is provided for the power key in cooperation with the voltage provided by the voltage reduction device.

Illustratively, the third resistance may be R3 in fig. 7-9.

With reference to the first aspect, the power key enabling module further includes a fourth resistor and a fifth resistor; one end of the fourth resistor is connected to a system power supply and is electrically connected with the voltage reduction device, the other end of the fourth resistor is respectively electrically connected with one end of the fifth resistor, an enabling pin of the voltage reduction device and a drain electrode of the second MOS tube, and the other end of the fifth resistor is grounded.

In this implementation, the fourth resistor and the fifth resistor serve as voltage dividing resistors to provide a preset voltage to the enable pin of the voltage reduction device.

Illustratively, the fourth and fifth resistances may be R4 and R5 in fig. 7-9.

With reference to the first aspect, the electronic device includes a battery and a charge-discharge module, and the power supply power-up module includes a third MOS transistor; the drain electrode of the third MOS tube is electrically connected with the main board detection pin of the battery, the source electrode of the third MOS tube is grounded, and the grid electrode of the third MOS tube is electrically connected with the voltage reduction device and the control device respectively; the battery is also electrically connected with the voltage reduction device through the charge-discharge module.

In the implementation mode, the main board detection pin of the battery is made to be high level or low level through the third MOS tube, so that the voltage reduction device is powered down through the battery, and the voltage reduction device is powered up again in combination with an external power supply to restore power supply to the control device.

Illustratively, the third MOS transistor may be Q3 in fig. 11 to 12.

With reference to the first aspect, the power supply power-up module further includes a sixth resistor; the sixth resistor is connected between the grid electrode of the third MOS tube, the voltage dropping device and the control device.

In the implementation mode, the sixth resistor is used as the protection resistor to prevent the gate of the third MOS tube from being connected with excessive voltage to influence the working process of the third MOS tube.

Illustratively, the sixth resistance may be R6 in FIG. 12.

In a second aspect, a battery control module is provided, including the step-down device, the control device, and the power restoration circuit, where the power restoration circuit is electrically connected to the step-down device and the control device, respectively.

In the embodiment of the application, in the power restoration circuit, after the abnormal protection of the voltage reduction device is locked, the power key enabling module can enable the voltage reduction device to be enabled again and restore to supply power to the control device through the mode of re-conducting the power key. Or the power supply power-on module can enable the voltage reduction device to be powered on again and restore to supply power to the control device through the mode of re-accessing the external power supply, so that normal use of the electronic device is guaranteed, a user can automatically solve the problem through simple operation, the electronic device is not required to be sent to be overhauled, and user experience is effectively improved.

In a third aspect, an electronic device is provided, including the battery control module.

In the embodiment of the application, the electronic equipment supplies power to the internal device through the battery control module, and when the power supply of the voltage reduction device is abnormal, the power supply can be quickly restored through the user operation, so that the user experience is effectively improved.

Drawings

Fig. 1 is a schematic diagram of a scenario of a mobile communication system to which an embodiment of the present application is applied;

Fig. 2 is a schematic structural diagram of an electronic device according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a battery control module according to an embodiment of the present application;

Fig. 4 is a circuit diagram of a battery control module according to an embodiment of the present application;

FIG. 5 is a schematic diagram of a power restoration circuit according to an embodiment of the present application;

FIG. 6 is a schematic diagram of a power restoration circuit according to another embodiment of the present application;

FIG. 7 is a circuit diagram of a power restoration circuit according to another embodiment of the present application;

FIG. 8 is a circuit diagram of a power restoration circuit according to another embodiment of the present application;

FIG. 9 is a circuit diagram of a power restoration circuit according to another embodiment of the present application;

Fig. 10 is a schematic structural diagram of a power restoration circuit according to another embodiment of the present application;

FIG. 11 is a circuit diagram of a power restoration circuit according to another embodiment of the present application;

Fig. 12 is a circuit diagram of a power restoration circuit according to another embodiment of the present application.

Detailed Description

The technical solutions of the embodiments of the present application will be clearly and thoroughly described below with reference to the accompanying drawings. Wherein, in the description of the embodiments of the present application, unless otherwise indicated, "/" means or, for example, a/B may represent a or B; the text "and/or" is merely an association relation describing the associated object, and indicates that three relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone.

The terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as implying or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature, and in the description of embodiments of the application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In order to facilitate understanding of the embodiments of the present application, related concepts related to the embodiments of the present application will be briefly described.

1. An Embedded Controller (EC) is an 8-bit or 16-bit single chip microcomputer in the field of electronic technology, and has a flash memory (flash memory) with a certain capacity to store codes of EC. During the start-up of the electronic device system, the EC controls the timing of most of the important signals. In a personal computer, the EC remains on regardless of whether the personal computer is in an on state or an off state, unless the battery and adapter are completely removed.

When the electronic equipment is in a shutdown state, the EC always keeps an operation state and waits for startup information of a user. When the electronic device is started, the EC is further used as a keyboard controller (keyboard controller, KBC), and the controllers of the charging indicator lamp, the fan, other various indicator lamps and other devices are even used for controlling the standby state, the dormant state and the like of the system. Meanwhile, information of a battery (battery) is also read by the EC, and the system knows information of the battery, such as electric quantity, temperature, voltage, charge-discharge current, battery state and the like through the EC.

2. A buck device, which is an electronic device that performs buck conversion on an input voltage, has an output voltage lower than the input voltage, in the field of electronic technology. The main circuit of the step-down device is generally composed of a switching tube, a diode, an output filter inductance, an output filter capacitance and the like. When the step-down device triggers abnormal protection such as overcurrent, overvoltage or overtemperature, the step-down device is easy to enter a locking state, namely the step-down device cannot be controlled to work normally, and the step-down device can work normally only by restarting an input power supply.

3. Enable (Enable), in the field of electronic technology, enable refers to allowing a certain pin (pin), chip or module of an electronic device to turn on a certain preset function and enter a preset state. For example, the working state of the pin after receiving the enable signal is the enable state. Or the computer motherboard needs to turn on some functions to enable it.

4. In the field of electronic technology, power-up refers to the process from when a power supply is turned on to when the system is stable to be operable, and is also called power-up time. Powering down refers to disconnecting the device from the power supply. The re-power-up means that the power supply is completely disconnected, and then the power supply is re-turned on, which can be also called reset.

5. The power key refers to a switch key for controlling power supply in the technical field of electronics. The function of the power key is mainly to turn on or off the electronic device, and the positions and shapes of the power keys of most electronic devices can be different.

6. In the field of electronic technology, an adapter refers to an interface converter, which may be an independent hardware interface device, allowing a hardware or electronic interface to be connected with other hardware or electronic interfaces, or may be an information interface. Such as power adapters, tripod base adapters, USB to serial adapters, and the like.

7. Presence (Pres) signals, in the field of electronics, the presence signals may include a battery presence signal and a motherboard presence signal, wherein the battery presence signal is output by the motherboard, indicating that a battery is connected to the motherboard. The motherboard presence signal is output by the battery, indicating that the motherboard is connected with the battery.

The foregoing is a simplified description of the terminology involved in the embodiments of the present application, and is not described in detail below.

Fig. 1 is a schematic diagram of a mobile communication system to which an embodiment of the present application is applicable.

As shown in fig. 1, a user may communicate with a base station 200 using an electronic device 100. The type of the electronic device 100 is not particularly limited in the embodiment of the present application. In some embodiments, the electronic device 100 may be an IOT (internet of things ) device such as a cell phone, a wearable device (e.g., a smart bracelet, a smart watch, a headset, etc.), a tablet computer, a laptop computer (laptop), a handheld computer, a notebook computer, an ultra-mobile personal computer (UMPC), a cellular phone, a Personal Digital Assistant (PDA), an augmented reality (Augmented reality, AR), a Virtual Reality (VR) device, etc., or a television, a large screen, a printer, a projector, etc. For ease of understanding, the following embodiments will be described by taking the electronic device 100 as an example of a personal computer.

Fig. 2 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

As shown in fig. 2, the personal computer may include a central processing module 10 (CPU, central processing unit/Processor), a battery control module 20, a battery 30, and a peripheral module 40, etc., which may be coupled by various interconnection buses or other electrical connections. Illustratively, the central processing module 10 is electrically connected to the battery control module 20 and the peripheral module 40, respectively, and the battery control module 20 is also electrically connected to the battery 30.

The central processing module 10 is one of the main devices of the personal computer, and is a core accessory in the personal computer. Its function is mainly to interpret computer instructions and process data in computer software. All operations in a personal computer are responsible for reading instructions, the core component of which decodes and executes the instructions. The program is a sequence of instructions, and the execution program executes instructions one by one according to the instruction sequence. Once the program is loaded into main memory, the tasks of fetching instructions from main memory and executing the instructions can be accomplished automatically by the CPU. Meanwhile, the function of one instruction is often realized by a component in a personal computer performing a series of operations. The CPU generates corresponding operation control signals according to the instruction functions and sends the corresponding operation control signals to corresponding components so as to control the components to act according to the instruction requirements.

Illustratively, the central processing module 10 may include arithmetic logic units, register units, operators, control units, and the like. The arithmetic logic unit may perform fixed-point or floating-point arithmetic operations, shift operations, and logic operations, and may also perform address operations and translations. Register unit, including general purpose registers, special purpose registers, and control registers. The control unit is mainly responsible for decoding the instructions and issuing control signals for each operation to be performed in order to complete each instruction.

The battery control module 20 is used primarily to provide power control for various electronic devices within a personal computer. By way of example, a personal computer may generally include a system-on-chip power supply, a battery charging power supply, a liquid crystal display backlight power supply, and the like. The embodiment of the application is mainly applied to a power supply for supplying power to each chip of the system.

The battery 30 is mainly used to supply power for the operation of the personal computer. For example, the battery in the notebook computer can provide electric energy for notebook computer work, thereby greatly facilitating the use of the notebook computer in various environments.

Peripheral module 40 may generally include a keyboard, a Mouse (Mouse), a display (display), a printer, headphones, a peripheral storage device, and the like. The keyboard is the most commonly used and main input device, and english letters, numbers, punctuation marks and the like can be input into a computer through the keyboard, so that commands, input data and the like can be sent to the computer. The mouse is an input device for a personal computer and is also a pointer for the positioning of the longitudinal and transverse coordinates of a computer display system. The mouse is used for enabling the operation of the computer to be simpler, more convenient and quicker, and replacing the tedious instructions of the keyboard. Displays are also commonly referred to as monitors. The display is an I/O device belonging to a computer, i.e., an input/output device. It is a display tool that displays certain electronic files on a screen through a specific transmission device and then reflects the electronic files to human eyes. The printer is used for printing out documents and pictures made in the personal computer. By way of example, the printer may generally be a pin printer, an inkjet printer, a laser printer, and the like.

The peripheral storage devices may include hard disk memory and removable memory. Hard disk memory (hard disk) refers to a magnetic surface storage device in which the recording medium is a hard platter. In personal computers, hard disks are a requisite external storage device. It has the characteristics of large storage capacity, high access speed, etc. The mobile hard disk consists of a hard disk and a hard disk box. Mobile hard disks generally have two specifications: 3.5 inches and 5.25 inches, respectively corresponding to the hard disks of the notebook computer and the desktop computer. A 3.5 inch hard disk is commonly used, and the hard disk has smaller volume and weight and is more convenient to carry. The mobile hard disk generally adopts a USB interface, and the data transmission speed is high.

It should be understood that the foregoing is merely an example of the structure of the electronic device 100, and the electronic device 100 may also include other subsystems or devices, and may be specifically configured and modified as needed, which is not limited in any way by the embodiment of the present application.

Fig. 3 is a schematic structural diagram of a battery control module according to an embodiment of the present application.

As shown in fig. 3, the battery control module 20 may include an embedded controller 201 and a voltage reduction device 202, the embedded controller 201 being electrically connected to the voltage reduction device 202. For example, in practical applications, the embedded controller 201 generally employs a voltage-reducing device with better conversion efficiency to supply power to the embedded controller in consideration of power consumption, cost, and other requirements. The voltage step-down device 202 is used to continuously supply power to the embedded controller 201, so as to ensure that the embedded controller 201 is always kept in an on state.

The embedded controller 201 is generally used to control the timing of most important signals within the electronic device. Meanwhile, the embedded controller 201 remains on regardless of whether the personal computer is in an on state or an off state, unless the battery and the adapter are completely removed. When the electronic device is in the off state, the embedded controller 201 keeps the running state all the time and waits for the startup information of the user. When the electronic device is in a power-on state, the embedded controller 201 can be used as a keyboard controller, a charging indicator light, a fan, and other controllers of various indicator lights, and also controls the standby state, the sleep state, and other states of the electronic device system.

The buck device 202 may include a circuit structure including a switching transistor, a diode, an output filter inductor, and an output filter capacitor, and is generally configured to buck an input voltage for continuously powering the embedded controller 201.

At present, a personal computer generally adopts an embedded controller to realize functions under a shutdown scene, such as displaying electric quantity after shutdown, opening a cover and starting up, and the like. The embedded controller typically employs a buck device to power it to maintain the power-on state of the embedded controller. However, when the step-down device is in an over-current, over-voltage or over-temperature abnormal protection, the step-down device is easy to enter a locking state, and cannot continuously supply power to the embedded controller, so that the personal computer is abnormally powered off and cannot be started, and a user can only send the personal computer to after-sales maintenance, so that the step-down device can recover to supply power to the embedded controller, and the user experience is affected.

In view of this, the embodiment of the application provides a power restoration circuit, which enables the voltage reduction device to be re-enabled or re-electrified by re-conducting the power key or re-accessing the external power source, and continues to supply power to the control device, so as to ensure the normal use of the electronic equipment. The operation mode is simple, and the user can solve the problem by himself without sending the electronic equipment to overhaul, so that time and money are saved, and the user experience is effectively improved.

The problem that the abnormal protection of the voltage reduction device in the battery control module is easy to enter a locking state is described in detail below with reference to fig. 4.

Fig. 4 is a circuit diagram of a battery control module according to an embodiment of the present application.

As shown in fig. 4, in one embodiment provided by the present application, the battery control module includes an Embedded Controller (EC) 201, a buck device (buck) 202, a battery 30, a charge-discharge module 205, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, and a power key (pwr_buck). The embedded controller 201 is electrically connected to a first power supply pin (3.3V) of the voltage reduction device 202, a main board detection pin (Pres) of the battery 30 is electrically connected to the embedded controller 201, and a voltage output pin (VBAT) of the battery 30 is electrically connected to a system power supply pin of the voltage reduction device 202 through the charge and discharge module 205. The enable pin (EN) of the voltage reduction device 202 is electrically connected to one end of the eleventh resistor R11 and one end of the twelfth resistor R12, respectively, the other end of the twelfth resistor R12 is grounded, and the other end of the eleventh resistor R11 and the system power pin of the voltage reduction device 202 are connected to the system power (VSYS). The embedded controller 201 is further electrically connected to one end of the thirteenth resistor R13 and one end of the power key, respectively, the other end of the power key is grounded, and the other end of the thirteenth resistor R13 is further electrically connected to the first power pin of the voltage reduction device 202.

In the embodiment of the present application, the voltage reduction device 202 is configured to continuously provide 3.3V voltage for the embedded controller 201, so that the embedded controller 201 can always maintain a power-on state, and maintain an application scenario after the personal computer is turned off. The battery 30 is configured to output electric energy to the step-down device 202 through the charge-discharge module 205 when it is detected that the embedded controller 201 is in a connected state with the battery 30, so that the step-down device 202 normally outputs 3.3V voltage to maintain the power-on state of the embedded controller 201. The eleventh resistor R11 and the twelfth resistor R12 form a voltage dividing resistor for providing a divided voltage to the enable pin (EN) of the voltage reduction device 202 according to the system voltage VSYS, so that the voltage reduction device 202 operates to maintain a power-on state. The thirteenth resistor R13 is used to protect the power key and the embedded controller 201.

When the voltage reduction device 202 is in a normal operation state, the voltage reduction device 202 continuously provides 3.3V voltage for the embedded controller 201, so that the embedded controller 201 can realize some functions of the personal computer in a shutdown scene, such as displaying electric quantity, opening a cover and starting up the cover.

The buck device 202 triggers a lock-up condition when the buck device 202 is abnormally protected due to an over-current, over-voltage, or over-temperature condition, etc. At this time, the system power VSYS continuously supplies power to the enable pin (EN) of the voltage-reducing device 202 through the voltage-dividing resistors eleventh resistor R11 and twelfth resistor R12, and the voltage-reducing device 202 may continuously receive a high level, but the output voltage of the voltage-reducing device 202 is zero, stopping the power supply to the embedded controller 201, resulting in the embedded controller 201 being powered down. Currently, to address the locked-out condition of the buck device 202, maintenance personnel are typically required to turn on the personal computer to re-enable or re-power the buck device 202. The user cannot unlock the locked state of the step-down device 202 by himself, and can only send the personal computer to after-market maintenance, so that a maintenance person can disassemble the personal computer, forcibly power up or re-enable the step-down device 202 after power is off, and re-supply power to the embedded controller 201. In theory, the problem that the step-down device is in a locked state is small, but the step-down device cannot be handled by a user, and a great deal of manpower and financial resources are still required to be spent for sending the personal computer to be maintained, so that the user experiences poor when using the personal computer.

Therefore, in order to solve the problem that the voltage reduction device in the embodiment of the application enters a locked state and cannot be started, the application provides a power restoration circuit, and the voltage reduction device is enabled again or electrified again by a mode that a power key is switched on again or an external power supply is switched on again, so that the power supply for the control device is continuously carried out, and the normal use of electronic equipment is ensured.

The scheme of enabling or powering up the buck device by the user himself will be described in detail below with reference to fig. 5 to 12.

Fig. 5 is a schematic diagram of a power restoration circuit according to an embodiment of the present application.

As shown in fig. 5, in one embodiment of the present application, the power restoration circuit 50 is suitable for an electronic device including a power key, where the electronic device includes a voltage step-down device 202 and a control device 203, and includes a power key enabling module 501 and/or a power-on module 502. The power key enabling module 501 is electrically connected to the voltage reducing device 202 and the control device 203, respectively, for enabling the voltage reducing device 202 to be re-enabled and restoring power to the control device 203 when the voltage reducing device is in a locked state and the power key is re-turned on in response to the first user operation. The power-on module 502 is electrically connected to the voltage-reducing device 202 and the control device 203, respectively, and is configured to enable the voltage-reducing device 202 to be powered on again and resume supplying power to the control device 203 when the voltage-reducing device is in a locked state and the electronic device is re-connected to an external power supply in response to a second user operation.

Illustratively, the power restoration circuit 50 may include only the power key enabling module 501 for enabling the voltage step-down device 202 to be re-enabled and restoring power to the control device 203 when the power key of the electronic device is re-turned on. For example, when the step-down device 202 in the electronic device is abnormally protected and enters a locked state, the user presses the power key of the electronic device again, and the internal circuit of the power key is briefly turned on, so that the enable signal of the step-down device 202 is low, and the step-down device 202 is briefly powered down. After the user releases his hand, the power key is automatically sprung up and reset, and the internal circuit of the power key continues to maintain the off state, so that the enable signal of the voltage reduction device 202 is at a high level, and the voltage reduction device 202 is enabled again, so that the power supply to the control device 203 can be restored, and the control device 203 maintains the power-on state.

It should be understood that in the embodiment of the present application, the power key adopts an automatic reset key that can be self-elastic after being pressed. When the power key is pressed, the internal circuit of the power key is turned on. When the user releases the hand, the power key automatically bounces up to reset, and the internal circuit of the power key is disconnected.

Illustratively, the control device 203 may employ the embedded controller 201 described above.

For example, a first user operation may employ a user pressing a power key and a second user operation may employ a user reinserting the adapter into the electronic device.

For example, when the power key of the electronic device employs a single pole double throw power key, the first user operation may be to push the power key to the "off" end and then push the power key to the "on" end for the user.

The second user operation may also be an operation of reinserting the adapter into the power outlet by the user, for example, while the adapter of the electronic device remains connected to the electronic device at all times, but disconnected from the power source.

Illustratively, the power restoration circuit 50 may also include only a power-on module 502 for powering up the voltage reduction device 202 again and restoring power to the control device 203 when the electronic device is powered back on to the external power source. For example, when the step-down device 202 in the electronic device is abnormally protected and enters a locked state, the user first pulls down the power adapter of the electronic device to power down the step-down device 202 in the electronic device, and then reinserts the power adapter into the power supply, so that the step-down device 202 is powered up again, that is, the power supply to the control device 203 can be restored, so that the control device 203 maintains the powered-up state.

When a battery is built in an electronic device (e.g., a computer), and the step-down device 202 is in a locked state when abnormal protection occurs in a state that the electronic device is connected to an external power source, a user needs to power off the electronic device and then power on again, so that the step-down device 202 is also powered on again to resume supplying power to the control device 203.

When a battery is built in an electronic device (for example, a computer) and the step-down device 202 is abnormally protected to enter a locked state in a state that the electronic device is not connected with an external power supply, that is, the electronic device is powered by the built-in battery, a user directly re-accesses the power supply for the electronic device, that is, the power supply adapter is plugged into a socket, so that the step-down device 202 is powered up again to restore power supply to the control device 203.

Illustratively, the power restoration circuit 50 may also include a power key enabling module 501 and a power-on module 502, where the power key enabling module 501 is configured to re-enable the voltage reduction device 202 and restore power to the control device 203 when the power key of the electronic device is re-turned on. For example, when the step-down device 202 in the electronic device is abnormally protected and enters a locked state, the user presses the power key of the electronic device again, and the internal circuit of the power key is briefly turned on, so that the enable signal of the step-down device 202 is low, and the step-down device 202 is briefly powered down. After the user releases his hand, the power key is automatically sprung up and reset, and the internal circuit of the power key continues to maintain the off state, so that the enable signal of the voltage reduction device 202 is at a high level, and the voltage reduction device 202 is enabled again, so that the power supply to the control device 203 can be restored, and the control device 203 maintains the power-on state. The power supply powering-up module 502 is configured to, when the electronic device is re-connected to the external power supply, re-power the voltage reduction device 202 and resume the power supply to the control device 203. For example, when the step-down device 202 in the electronic device is abnormally protected and enters a locked state, the user first pulls down the power adapter of the electronic device to power down the step-down device 202 in the electronic device, and then reinserts the power adapter into the power supply, so that the step-down device 202 is powered up again, that is, the power supply to the control device 203 can be restored, so that the control device 203 maintains the powered-up state.

When the step-down device 202 is in the normal power supply state, the 3.3V voltage may be continuously output to the control device 203, and when the step-down device 202 is in the abnormal dead lock state, the output voltage of the step-down device 202 is zero, and the power supply to the control device 203 is disabled. When the voltage output from the step-down device 202 is less than 3.3V, it may also be considered that the step-down device 202 is in an abnormal state, and the step-down device 202 needs to be re-enabled or re-powered, and the voltage of 3.3V is restored to the control device 203.

Fig. 6 is a schematic structural diagram of a power restoration circuit according to another embodiment of the present application.

As shown in fig. 6, in one embodiment provided by the present application, the power restoration circuit 50 may include only a power key enabling module 501, where the power key enabling module 501 is electrically connected to the voltage reduction device 202 and the control device 203, respectively, and the power key enabling module 501 is configured to enable the voltage reduction device 202 again and restore power to the control device 203 when the voltage reduction device 202 is in a locked state and the power key is turned back on in response to an operation of pressing the power key by a user.

It should be noted that, when the power restoration circuit 50 includes only the power key enabling module 501 in the embodiment of the present application, the motherboard detecting pin of the battery 30 is still electrically connected to the control device 203, and the power pin of the battery is still electrically connected to the system power pin of the voltage reduction device 202 through the charge/discharge module 205. When the main board detection pin of the battery 30 detects that the control device 203 is in a connected state, the system power VSYS is still supplied to the voltage step-down device 202 through the charge-discharge module 205.

Fig. 7 is a circuit diagram of a power restoration circuit according to another embodiment of the present application.

As shown in fig. 7, in one embodiment of the present application, the power key enabling module 501 includes a first MOS transistor Q1, a second MOS transistor Q2, and a first resistor R1. The grid of the first MOS tube Q1 is electrically connected with a first power pin (3.3V) of the voltage reduction device 202, the source electrode of the first MOS tube Q1 is grounded, the drain electrode of the first MOS tube Q1 is electrically connected with the grid of the second MOS tube Q2 and one end of the first resistor R1 respectively, the other end of the first resistor R1 is connected with a system power supply VSYS, the drain electrode of the second MOS tube Q2 is electrically connected with an enabling pin EN of the voltage reduction device 202, the source electrode of the second MOS tube Q2 is electrically connected with one end of the control device 203 and one end of the power key S1 respectively, and the other end of the power key S1 is grounded.

Illustratively, the power key S1 may employ an automatic reset key that is self-elastic after being pressed.

Illustratively, the power key S1 may multiplex the power key that is already present on the personal computer.

For example, the resistance value of the first resistor R1 may be 50kΩ.

In the embodiment of the present application, when the voltage reduction device 202 normally outputs 3.3V voltage and supplies power to the control device 203, the first MOS transistor Q1 is turned on, the system power source VSYS is grounded after passing through the first resistor R1, so that the gate of the second MOS transistor Q2 is grounded, and the second MOS transistor Q2 is disconnected, thereby isolating the power key S1 from the enable pin EN of the voltage reduction device 202. When the user presses the power key S1, the enable pin EN of the voltage reduction device 202 is not affected.

When the abnormal output of the voltage reduction device 202 enters a locked state, the first MOS transistor Q1 is turned off, the system power source VSYS pulls up the gate voltage of the second MOS transistor Q2 through the first resistor R1, and the second MOS transistor Q2 is turned on, so that the first power key S1 is connected to the enable pin EN of the voltage reduction device 202. When the user presses the power key S1, the power key S1 is turned on to ground the enable pin EN of the voltage reduction device 202, so that the enable pin EN of the voltage reduction device 202 is powered down. When the power key S1 is automatically sprung up for reset, the power key S1 is turned off, and the enable pin EN of the voltage reduction device 202 is pulled up again by the system power supply VSYS, thereby enabling the voltage reduction device 202 again, so that the voltage reduction device 202 resumes supplying the 3.3V voltage to the control device 203.

As shown in fig. 7, in one embodiment provided by the present application, the power key enabling module 501 further includes a third resistor R3; one end of the third resistor R3 is electrically connected to one end of the power key S1, and the other end of the third resistor R3 is electrically connected to the first power pin 3.3V of the voltage reduction device 202.

In the embodiment of the present application, the third resistor R3 is used as a pull-up resistor, and the 3.3V voltage output by the voltage-reducing device 202 provides the input voltage for the power key S1. When the power key S1 is turned on, the 3.3V voltage output by the voltage reduction device 202 is grounded through the third resistor R3 and the power key S1.

As shown in fig. 7, in one embodiment provided by the present application, the power key enabling module 501 further includes a fourth resistor R4 and a fifth resistor R5; one end of the fourth resistor R4 is connected to the system power supply VSYS and is electrically connected with the voltage reduction device 202, the other end of the fourth resistor R4 is respectively electrically connected with one end of the fifth resistor R5, an enable pin EN of the voltage reduction device 202 and a drain electrode of the second MOS tube Q2, and the other end of the fifth resistor R5 is grounded.

In the embodiment of the present application, the fourth resistor R4 and the fifth resistor R5 form a voltage dividing resistor, and the system power VSYS provides a voltage dividing value for the enable pin EN of the voltage-reducing device through the voltage dividing resistor.

For example, the first MOS transistor Q1 and the second MOS transistor Q2 may also be replaced by other switching devices having a switching function. Such as a transistor or the like.

Fig. 8 is a circuit diagram of a power restoration circuit according to another embodiment of the present application.

As shown in fig. 8, in one embodiment of the present application, the power key enabling module 501 includes a first MOS transistor Q1, a second MOS transistor Q2, a first resistor R1, a second resistor R2, and a power key S1. The grid of the first MOS tube Q1 is electrically connected with a first power pin (3.3V) of the voltage reduction device 202, the source electrode of the first MOS tube Q1 is grounded, the drain electrode of the first MOS tube Q1 is electrically connected with the grid of the second MOS tube Q2 and one end of the first resistor R1 respectively, the other end of the first resistor R1 is connected with a system power supply VSYS, the drain electrode of the second MOS tube Q2 is electrically connected with an enabling pin EN of the voltage reduction device 202, the source electrode of the second MOS tube Q2 is electrically connected with one end of the control device 203 and one end of the power key S1 respectively, and the other end of the power key S1 is grounded. The second resistor R2 is connected between the gate of the first MOS transistor Q1 and the first power pin 3.3V of the voltage reduction device 202.

For example, the resistance value of the second resistor R2 may be 1kΩ.

In the embodiment of the present application, when the step-down device 202 normally outputs 3.3V voltage and supplies power to the control device 203, the first MOS transistor Q1 is turned on, and the second resistor R2 is used to protect the first MOS transistor Q1, so as to prevent the gate of the first MOS transistor from being impacted by a larger current. The system power source VSYS is grounded after passing through the first resistor R1, so that the gate of the second MOS transistor Q2 is grounded, and the second MOS transistor Q2 is disconnected, thereby isolating the power key S1 from the enable pin EN of the voltage-reducing device 202. When the user presses the power key S1, the enable pin EN of the voltage reduction device 202 is not affected.

Fig. 9 is a circuit diagram of a power restoration circuit according to another embodiment of the present application.

As shown in fig. 9, in one embodiment of the present application, the power key enabling module 501 includes a first MOS transistor Q1, a second MOS transistor Q2, a first resistor R1, a second resistor R2, a first diode D1, and a power key S1. The grid of the first MOS tube Q1 is electrically connected with a first power pin (3.3V) of the voltage reduction device 202, the source electrode of the first MOS tube Q1 is grounded, the drain electrode of the first MOS tube Q1 is electrically connected with the grid of the second MOS tube Q2 and one end of the first resistor R1 respectively, the other end of the first resistor R1 is connected with a system power supply VSYS, the drain electrode of the second MOS tube Q2 is electrically connected with an enabling pin EN of the voltage reduction device 202, the source electrode of the second MOS tube Q2 is electrically connected with one end of the control device 203 and one end of the power key S1 respectively, and the other end of the power key S1 is grounded. The second resistor R2 is connected between the gate of the first MOS transistor Q1 and the first power pin 3.3V of the voltage reduction device 202. The positive electrode of the first diode D1 is electrically connected to the control device 203, and the negative electrode of the first diode D1 is electrically connected to the source electrode of the second MOS transistor Q2.

In the embodiment of the present application, when the step-down device 202 normally outputs 3.3V voltage and supplies power to the control device 203, the first MOS transistor Q1 is turned on, and the second resistor R2 is used to protect the first MOS transistor Q1, so as to prevent the gate of the first MOS transistor from being impacted by a larger current. The system power source VSYS is grounded after passing through the first resistor R1, so that the gate of the second MOS transistor Q2 is grounded, and the second MOS transistor Q2 is disconnected, thereby isolating the power key S1 from the enable pin EN of the voltage-reducing device 202. The first diode D1 is used to unidirectionally conduct current of the control device 203. When the user presses the power key S1, the general-purpose input/output (GPIO) of the control device 203 can be normally pulled down through the first diode D1 due to the unidirectional conduction of the first diode D1, and the enable pin EN of the voltage step-down device 202 is not affected.

Illustratively, the first diode D1 is selected to take forward buck into account, so the turn-on voltage of the first diode D1 needs to be lower than the low level threshold of the GPIO of the control device 203.

When the abnormal protection of the step-down device 202 fails to continuously output the 3.3V voltage to the control device 203, the control device 203 is powered down. When the control device 203 is powered down, the GPIO of the control device 203 is not configured, the state is unstable, and after actual measurement, the control device 203 will draw a certain current from the voltage reduction device 202. Therefore, in order to isolate the current pumping capability of the control device 203, the first diode D1 may be provided to prevent the control device 203 from affecting the step-down device 202.

In addition, it should be noted that, when the electronic device (for example, a computer) is abnormally turned off, the user will press the power key in a condition reflective manner to try to restart the electronic device, so in the embodiment of the application, the voltage reduction device 202 is enabled again by the user pressing the power key, and the power supply to the control device 203 is restored, which can very conveniently help the user solve the problem that the voltage reduction device 202 is abnormally protected from entering the locked state, reduce the times of maintaining the electronic device by the user, and effectively improve the user experience.

Fig. 10 is a schematic structural diagram of a power restoration circuit according to another embodiment of the present application.

As shown in fig. 10, in one embodiment of the present application, the power restoration circuit 50 may only include a power-on module 502, where the power-on module 502 is electrically connected to the voltage-reduction device 202 and the control device 203, respectively, and the power-on module 502 is configured to, when the voltage-reduction device 202 is in a locked state and the electronic device is re-connected to the external power source in response to the user re-plugging the adapter, re-power the voltage-reduction device 202 and restore the power to the control device 203.

It should be noted that, when the power restoration circuit 50 includes only the power-on module 502 in the embodiment of the present application, the voltage reduction device 202 is still electrically connected to the control device 203, so that when the voltage reduction device 202 is in a normal state, power may be supplied to the control device 203 to maintain the power-on state of the control device 203.

Fig. 11 is a circuit diagram of a power restoration circuit according to another embodiment of the present application.

As shown in fig. 11, in one embodiment of the present application, the electronic device includes a battery 30 and a charge-discharge module 205, and the power-on module 502 includes a third MOS transistor Q3; the drain electrode of the third MOS tube Q3 is electrically connected with a main board detection pin pres of the battery 30, the source electrode of the third MOS tube Q3 is grounded, and the grid electrode of the third MOS tube Q3 is electrically connected with the voltage reduction device 202 and the control device 203 respectively; the battery 30 is also electrically connected to the voltage step-down device 202 through a charge-discharge module 205. The battery charge and discharge module 205 is used to regulate the charge and discharge process of the battery 30.

Illustratively, the motherboard test pin pres of the battery 30 is used to test whether the motherboard (i.e., the control device 203) to which the battery 30 is to be connected is connected, and the pin on the control device 203 connected to the motherboard test pin pres is grounded. When the battery 30 is connected to the control device 203, the main board detection pin pres of the battery 30 is pulled low, so that the battery 30 outputs the battery voltage VBAT, and the system power VSYS is provided to the voltage step-down device 202 through the charge/discharge module 205. Conversely, when the motherboard detection pin pres of the battery 30 is low, the battery 30 does not output voltage.

In the embodiment of the present application, when the voltage reduction device 202 normally outputs 3.3V voltage to supply power to the control device 203, the voltage reduction device 202 is further configured to supply power to the third MOS transistor Q3, the gate of the third MOS transistor Q3 is connected to a high level, the third MOS transistor Q3 is turned on, and the main board detection pin pres of the battery 30 is grounded, so that the battery 30 normally outputs the battery voltage VBAT to provide the system power VSYS to the voltage reduction device 202 through the battery charging and discharging module 205, and the voltage reduction device 202 maintains a power-on state.

When the step-down device 202 is abnormally protected and enters a locked state and cannot output 3.3V voltage to supply power to the control device 203, the gate of the third MOS transistor Q3 is connected to a low level, the third MOS transistor Q3 is disconnected to isolate the main board detection pin pres of the battery 30 from the ground, so that the main board detection pin pres of the battery 30 is suspended, the battery 30 stops outputting the battery voltage VBAT, the supply of the system power VSYS to the step-down device 202 is stopped, and the step-down device 202 is powered down.

When the external power is re-connected to the step-down device 202, the step-down device 202 is powered up again, and the 3.3V voltage is restored to be output to supply power to the control device 203. Meanwhile, the 3.3V voltage output by the voltage reduction device 202 makes the gate of the third MOS transistor Q3 access to a high level, and the main board detection pin pres of the battery is grounded, so that the battery 30 normally outputs the battery voltage VBAT, and the system power VSYS is provided for the voltage reduction device 202 through the battery charging and discharging module 205, so that the voltage reduction device 202 maintains a power-on state.

Illustratively, the user may re-power the buck device 202 through the power adapter.

As shown in fig. 12, in one embodiment of the present application, the electronic device includes a battery 30 and a charge-discharge module 205, and the power-on module 502 includes a third MOS transistor Q3 and a sixth resistor R6; the drain electrode of the third MOS tube Q3 is electrically connected with a main board detection pin pres of the battery 30, the source electrode of the third MOS tube Q3 is grounded, and the grid electrode of the third MOS tube Q3 is electrically connected with the voltage dropping device 202 and the control device 203 through a sixth resistor R6 respectively; the battery 30 is also electrically connected to the voltage step-down device 202 through a charge-discharge module 205. The battery charge and discharge module 205 is used to regulate the charge and discharge process of the battery 30. The sixth resistor R6 is used for protecting the third MOS transistor Q3, and preventing the voltage reduction device 202 from causing a larger current surge to the gate of the third MOS transistor Q3.

In the embodiment of the present application, when the voltage reduction device 202 normally outputs 3.3V voltage to supply power to the control device 203, the voltage reduction device 202 is further configured to supply power to the third MOS transistor Q3 through the sixth resistor R6, the gate of the third MOS transistor Q3 is connected to a high level, the third MOS transistor Q3 is turned on, and the main board detection pin pres of the battery 30 is grounded, so that the battery 30 normally outputs the battery voltage VBAT to provide the system power VSYS for the voltage reduction device 202 through the battery charging/discharging module 205, and the voltage reduction device 202 maintains a power-on state.

When the external power is re-connected to the step-down device 202, the step-down device 202 is powered up again, and the 3.3V voltage is restored to be output to supply power to the control device 203. Meanwhile, the 3.3V voltage output by the voltage reduction device 202 makes the gate of the third MOS transistor Q3 access to a high level through the sixth resistor R6, and the main board detection pin pres of the battery is grounded, so that the battery 30 normally outputs the battery voltage VBAT, the system power VSYS is provided for the voltage reduction device 202 through the battery charging and discharging module 205, and the voltage reduction device 202 maintains a power-on state.

Illustratively, the power-on module 502 may also protect a second diode, which may be connected between the buck device 202 and the control device 203. When the voltage step-down device 202 is powered down, the characteristics of the control device 203 that draw current are prevented by the second diode from affecting the back-end circuit.

It should be noted that, for the computer integrated with the existing battery and the machine body, in order to improve the user experience, to prevent the battery from being exhausted during the transportation process of the computer, the computer is generally set to be activated by plugging in the power adapter to re-access the external power source before the computer is used for the first time. Therefore, on the basis of the method, the device and the system, the user can be very conveniently helped to solve the problem that the step-down device 202 is abnormally protected to enter the locking state by re-electrifying the step-down device through re-accessing the external power supply, the frequency of maintaining the electronic equipment by the user is reduced, and the user experience is effectively improved.

In one embodiment provided by the present application, the battery control module 20 includes a voltage step-down device 202, a control device 203, and a power restoration circuit 50, the power restoration circuit 50 being electrically connected to the voltage step-down device 202 and the control device 203, respectively. The power restoration circuit 50 is used to maintain the power supply process of the step-down device 202 to the control device 203.

Illustratively, when the output state of the voltage reduction device 202 is normal, power is supplied to the control device 203 by the resume power supply circuit 50 to maintain the power-on state of the control device 203. When the abnormal protection of the voltage reduction device 202 occurs and enters a locking state, a user adopts a mode of pressing a power key or re-accessing a power supply, and the voltage reduction device 202 is enabled again or electrified again through the power supply recovery circuit 50 and power supply to the control device 203 is recovered, so that the user can automatically solve the problem through simple operation, and the electronic equipment is not required to be sent to be overhauled, and the user experience is effectively improved.

The embodiment of the application also provides electronic equipment, which comprises the battery control module, wherein the battery control module comprises the recovery power supply circuit 50, when the step-down device 202 is abnormally protected and enters a locked state, a user presses a power key or re-accesses a power supply, and the step-down device 202 is re-enabled or re-electrified and power supply to the control device 203 is restored through the recovery power supply circuit 50, so that the user can automatically solve the problem through simple operation without sending the electronic equipment to overhaul, and the user experience is effectively improved.

The beneficial effects achieved by the electronic device provided by the embodiment of the present application can refer to the beneficial effects corresponding to the modules provided above, and are not described herein.

It should be understood that the above description is only intended to assist those skilled in the art in better understanding the embodiments of the present application, and is not intended to limit the scope of the embodiments of the present application. It will be apparent to those skilled in the art from the foregoing examples that various equivalent modifications or variations can be made, for example, certain steps may not be necessary in the various embodiments of the detection methods described above, or certain steps may be newly added, etc. Or a combination of any two or more of the above. Such modifications, variations, or combinations are also within the scope of embodiments of the present application. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

It should also be understood that the foregoing description of embodiments of the present application focuses on highlighting differences between the various embodiments and that the same or similar elements not mentioned may be referred to each other and are not repeated herein for brevity.

It should also be understood that, in various embodiments of the present application, the sequence number of each process does not mean that the execution sequence of each process should be determined by its functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

It should be further understood that, in the embodiments of the present application, the "preset" and "predefined" may be implemented by pre-storing corresponding codes, tables, or other manners that may be used to indicate relevant information in a device (including, for example, an electronic device), and the present application is not limited to the specific implementation manner thereof.

It should also be understood that the manner, the case, the category, and the division of the embodiments in the embodiments of the present application are merely for convenience of description, should not be construed as a particular limitation, and the features in the various manners, the categories, the cases, and the embodiments may be combined without contradiction.

It is also to be understood that in the various embodiments of the application, where no special description or logic conflict exists, the terms and/or descriptions between the various embodiments are consistent and may reference each other, and features of the various embodiments may be combined to form new embodiments in accordance with their inherent logic relationships.

Finally, it should be noted that: the foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application should be defined by the claims, and the above description is only a preferred embodiment of the technical solution of the present application, and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A restoration power supply circuit is suitable for electronic equipment comprising a power key, wherein the electronic equipment comprises a voltage reduction device and a control device and is characterized by comprising a power key enabling module and/or a power supply powering-on module;

The power key enabling module is respectively and electrically connected with the voltage reducing device and the control device and is configured to enable the voltage reducing device to be enabled again and restore power supply to the control device when the voltage reducing device is in a locking state and the power key is turned on again in response to first user operation;

The power supply electrifying module is respectively and electrically connected with the voltage reducing device and the control device and is configured to enable the voltage reducing device to be electrified again and resume supplying power to the control device when the voltage reducing device is in a locking state and the electronic equipment is accessed to an external power supply again in response to a second user operation;

the power key enabling module comprises a first MOS tube, a second MOS tube and a first resistor;

The grid electrode of the first MOS tube is electrically connected with a first power supply pin of the voltage reduction device, the source electrode of the first MOS tube is grounded, the drain electrode of the first MOS tube is respectively electrically connected with the grid electrode of the second MOS tube and one end of the first resistor, the other end of the first resistor is connected with a system power supply, the drain electrode of the second MOS tube is electrically connected with an enabling pin of the voltage reduction device, the source electrode of the second MOS tube is respectively electrically connected with one end of the control device and one end of the power key, and the other end of the power key is grounded;

The electronic equipment comprises a battery and a charging and discharging module, and the power supply electrifying module comprises a third MOS tube;

The drain electrode of the third MOS tube is electrically connected with the main board detection pin of the battery, the source electrode of the third MOS tube is grounded, and the grid electrode of the third MOS tube is electrically connected with the voltage reduction device and the control device respectively; the battery is also electrically connected with the voltage reduction device through the charge-discharge module.

2. The power restoration circuit as recited in claim 1, wherein said power key enable module further comprises a second resistor;

the second resistor is connected between the grid electrode of the first MOS tube and the first power supply pin of the voltage reduction device.

3. The restoration power circuit as recited in claim 1 or 2, wherein said power key enabling module further comprises a first diode;

the positive electrode of the first diode is electrically connected with the control device, and the negative electrode of the first diode is electrically connected with the source electrode of the second MOS tube.

4. The restoration power circuit as recited in claim 1 or 2, wherein said power key enabling module further comprises a third resistor;

One end of the third resistor is electrically connected with one end of the power key, and the other end of the third resistor is electrically connected with the first power pin of the voltage reduction device.

5. The restoration power circuit as recited in claim 1 or 2, wherein said power key enabling module further comprises a fourth resistor and a fifth resistor;

one end of the fourth resistor is connected to a system power supply and is electrically connected with the voltage reduction device, the other end of the fourth resistor is respectively electrically connected with one end of the fifth resistor, an enabling pin of the voltage reduction device and a drain electrode of the second MOS tube, and the other end of the fifth resistor is grounded.

6. The restoration power circuit as recited in claim 1, wherein said power-on module further comprises a sixth resistor;

The sixth resistor is connected between the grid electrode of the third MOS tube, the voltage dropping device and the control device.

7. The power restoration circuit as recited in claim 1 or 2, wherein said first user operation comprises a user operation of pressing a power key and said second user operation comprises a user reinserting an adapter for an electronic device.

8. A battery control module comprising the step-down device, the control device, and the power restoration circuit of any one of claims 1 to 7, the power restoration circuit being electrically connected to the step-down device and the control device, respectively.

9. An electronic device comprising the battery control module of claim 8.