Startup and shutdown circuit, electronic equipment and control method thereof

Abstract

The invention discloses a startup and shutdown circuit, electronic equipment thereof and a control method, and relates to the technical field of built-in battery products, and the startup and shutdown circuit comprises a power supply circuit, a trigger circuit and a main control circuit. The main control system is temporarily powered and started by the trigger circuit only at the awakening moment, and is immediately switched to the main power supply channel after initialization is completed, and the trigger loop is synchronously turned off, so that the complete electrical isolation of the main control unit and the battery in the shutdown state is realized on the premise of maintaining the complete control function, and the power consumption of the system only depends on the physical characteristics of the battery. And zero-power-consumption shutdown is realized. The scheme is constructed on the basis of conventional standard devices, the pain point of unbalanced cost and performance caused by dependence on high-cost devices in a traditional scheme is made up while the ultra-long endurance and the storage and transportation time are guaranteed, and the ultra-long endurance and the storage and transportation time of a built-in battery product are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of built-in battery products, and in particular to a power on / off circuit, its electronic equipment, and a control method. Background Art

[0002] Currently, the circuit design of products with built-in batteries faces severe challenges in pursuing low power consumption and cost control. Traditional solutions usually require the use of expensive low-power microcontrollers and peripheral devices to reduce shutdown power consumption, such as power management chips with ultra-low quiescent current, high-precision voltage regulator modules, etc., which leads to a significant increase in hardware costs. Especially in large-scale mass production, the premium of such dedicated components will further weaken the price advantage of the product. In addition, in the existing technology, the power on and off logic of the microcontroller mostly relies on its built-in low-power mode (such as sleep and shutdown mode). Even in the shutdown state, the microcontroller still needs to maintain the power supply of some functional modules to respond to the wake-up signal. The resulting quiescent current of hundreds of microamperes may cause the product to fail due to battery exhaustion within a few months for batteries with limited capacity, which seriously restricts its application in scenarios such as warehousing and logistics, and long-term outdoor monitoring.

[0003] Existing designs also suffer from the problem of high circuit coupling: the trigger circuit and the main power supply circuit share some components, which causes voltage fluctuations or environmental interference during key operations to be easily transmitted to the main power path, causing false wake-up or system instability. To simplify the design, some solutions even retain some power branches to power the detection circuit when the device is turned off, further exacerbating the leakage current problem. In addition, some devices require an external power supply as the wake-up signal source. In a pure battery scenario without an adapter connection, the device may completely shut down due to the inability to wake up reliably, greatly limiting its practicality as a standalone mobile terminal. Summary of the Invention

[0004] The main purpose of this application is to provide a power on / off circuit and its electronic equipment and control method, aiming to solve the technical problem that traditional built-in battery products cannot achieve both low shutdown power consumption and low cost.

[0005] To achieve the above objectives, the present application provides a power-on / off circuit for use in electronic equipment. The electronic equipment includes a battery. The power-on / off circuit includes a power supply circuit, a trigger circuit, and a main control circuit. The input terminals of the power supply circuit and the trigger circuit are connected to the output terminal of the battery. The power input terminal of the main control circuit is connected to the output terminals of the trigger circuit and the power supply circuit. The control terminal of the main control circuit is connected to the controlled terminals of the power supply circuit and the trigger circuit.

[0006] The power supply circuit is used to process the power of the battery and output it to the main control circuit to supply power to the main control circuit;

[0007] The trigger circuit is configured to process the power of the battery and output the power to the main control circuit in response to a user operation, so as to provide auxiliary power to the main control circuit;

[0008] The main control circuit is awakened and starts working when the trigger circuit provides auxiliary power; and outputs a corresponding power supply control signal to the power supply circuit according to the user operation instruction to start / stop the power supply circuit;

[0009] The main control circuit is further configured to output a shutdown control signal to the trigger circuit when receiving a power signal output by the power supply circuit, so as to shut down the trigger circuit.

[0010] In one embodiment, the trigger circuit includes a switch trigger circuit and a step-down circuit, wherein the input end of the switch trigger circuit is connected to the output end of the battery, the output end of the switch trigger circuit is connected to the input end of the step-down circuit, and the output end of the step-down circuit is connected to the power input end of the main control circuit;

[0011] The switch trigger circuit is used to connect the battery and the step-down circuit when operated by the user;

[0012] When the connection between the step-down circuit and the battery is turned on, the step-down circuit is used to step down the power of the battery and output it to the main control circuit to provide auxiliary power to the main control circuit.

[0013] In one embodiment, the switch trigger circuit includes a switch button, a first switch tube and a second switch tube;

[0014] One end of the switch button is connected to the output end of the battery, and the other end is connected to the controlled end of the first switch tube; the input end of the first switch tube is connected to the controlled end of the second switch tube, and the output end of the first switch tube is grounded; the input end and the controlled end of the second switch tube are connected to the output end of the battery, and the output end of the second switch tube is connected to the input end of the step-down circuit;

[0015] When the switch button is turned on by the user, the first switch tube is turned on and the second switch tube is turned on, so that the step-down circuit steps down the power supply of the battery into an auxiliary power supply voltage and outputs it to the main control circuit;

[0016] The input end of the main control circuit is connected to one end of the switch button, and is also used to receive and output a corresponding power supply control signal to the power supply circuit according to the voltage of the switch button to start / stop the power supply circuit.

[0017] In one embodiment, the switch trigger circuit further includes a diode and a third switch tube;

[0018] The anode of the diode is connected to the controlled terminal of the first switch tube, and the cathode is connected to the input terminal of the third switch tube; the controlled terminal of the third switch tube is connected to the main control circuit, and the output terminal of the third switch tube is grounded;

[0019] The main control circuit is used to output a shutdown control signal to the third switch tube when receiving the power signal output by the power supply circuit, and control the third switch tube to be disconnected and then control the first switch tube to be disconnected to turn off the trigger circuit.

[0020] In one embodiment, the power supply circuit further includes a power supply switch circuit and a power conversion circuit, wherein the input end of the power supply switch circuit is connected to the output end of the battery, the output end of the power supply switch circuit is connected to the input end of the power conversion circuit, the controlled end of the power supply switch circuit is connected to the output end of the main control circuit, and the output end of the power conversion circuit is connected to the power input end of the main control circuit;

[0021] The power switch circuit is used to receive and, according to the power control signal output by the main control circuit, switch on / off the connection between the battery and the power conversion circuit;

[0022] The power conversion circuit is used to process and output the power of the battery.

[0023] In one embodiment, the power switch circuit includes a fourth switch tube and a fifth switch tube;

[0024] The input end of the fourth switching tube is connected to the controlled end of the fifth switching tube, the output end of the fourth switching tube is grounded, and the controlled end of the fourth switching tube is connected to the output end of the main control circuit; the input end of the fifth switching tube is connected to the output end of the battery, and the output end of the fifth switching tube is connected to the input end of the power conversion circuit;

[0025] The main control circuit is used to output a corresponding power supply control signal according to a user operation instruction, and to control the fourth switch tube to be turned on / off and then the fifth switch tube to be turned on / off, so as to turn on / off the connection between the battery and the power conversion circuit.

[0026] In one embodiment, it further includes:

[0027] An external power supply detection circuit, having an input end connected to an external power supply and an output end connected to the main control circuit, for detecting the connection of an external power supply and outputting an external power off signal to the main control circuit when the external power supply is off;

[0028] In which, the main control circuit is also used to output a corresponding control signal to the trigger circuit when receiving the external leave signal output by the external power supply detection circuit, so that the trigger circuit processes the power of the battery and outputs it to the main control circuit to provide auxiliary power to the main control circuit.

[0029] In one embodiment, the switch trigger circuit further includes a sixth switch tube and a seventh switch tube;

[0030] The controlled terminal of the sixth switch tube is connected to the output terminal of the main control circuit, the input terminal of the sixth switch tube is connected to the controlled terminal of the seventh switch tube, and the output terminal of the sixth switch tube is grounded; the input terminal of the seventh switch tube is connected to the output terminal of the battery, and the output terminal of the seventh switch tube is connected to the controlled terminal of the first switch tube;

[0031] The main control circuit is further configured to control the sixth and seventh switch tubes to be turned on and then control the first switch tube to be turned on when receiving the external power off signal output by the external power detection circuit, so as to start the trigger circuit.

[0032] In addition, to achieve the above-mentioned purpose, the present application also proposes an electronic device, including a battery and the above-mentioned power-on / off circuit.

[0033] In addition, to achieve the above-mentioned purpose, the present application also proposes a power on / off control method, which is implemented based on the above-mentioned power on / off circuit, and includes:

[0034] In the shutdown state, the user switches the device to the power-on state and starts the device;

[0035] The trigger circuit responds to user operation, processes the power of the battery and outputs it to the main control circuit to provide auxiliary power to the main control circuit;

[0036] Based on the auxiliary power provided by the trigger circuit, the main control circuit is awakened and starts working; and the power supply control signal output is sent to the power supply circuit to start the power supply circuit;

[0037] Based on the power supply circuit starting to supply power, the main control circuit outputs a shutdown control signal to the trigger circuit to shut down the trigger circuit;

[0038] When the device is in the on state, it is turned off by the user;

[0039] The main control circuit outputs a power supply control signal to the power supply circuit to shut down the power supply circuit.

[0040] One or more technical solutions proposed in this application have at least the following technical effects:

[0041] The present application includes a power supply circuit, a trigger circuit and a main control circuit, wherein the input ends of the power supply circuit and the trigger circuit are respectively connected to the battery output end, the power input end of the main control circuit is connected to the output ends of the two, and the control end forms a closed-loop control link with the controlled end of the power supply circuit and the trigger circuit respectively. The present application establishes a physical isolation mechanism between the main power supply circuit and the trigger circuit. By setting up an independent dual-channel power supply system, the main control system is temporarily powered and started by the trigger circuit only at the moment of wake-up. After the initialization is completed, it immediately switches to the main power supply channel and synchronously turns off the trigger circuit, thereby achieving complete electrical isolation between the main control unit and the battery in the shutdown state while maintaining the complete control function. The system power consumption depends only on the physical characteristics of the battery itself, achieving zero-power shutdown. The solution is built based on conventional standard components. While ensuring ultra-long battery life and storage and transportation time, it makes up for the pain point of the imbalance between cost and performance caused by traditional solution products due to reliance on high-cost components, and achieves ultra-long battery life and storage and transportation time for products with built-in batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0043] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0044] Figure 1 This is a schematic diagram of the switch circuit of this application;

[0045] Figure 2 This is a schematic diagram of a power on / off circuit according to an embodiment of the present invention;

[0046] Figure 3 This is a trigger circuit diagram of an embodiment of a power on / off circuit of the present application;

[0047] Figure 4 This is a power supply circuit diagram of an embodiment of a power on / off circuit of the present application;

[0048] Figure 5 A circuit diagram of a main control circuit and an external power detection circuit of an embodiment of a power on / off circuit of the present application;

[0049] Figure 6 This is a flowchart of the power-on process in an embodiment of a power-on / off control method of the present application;

[0050] Figure 7This is a flowchart of a shutdown process in an embodiment of a power on / off control method of the present application.

[0051] Explanation of the accompanying symbols: power supply circuit 01, power supply switch circuit 11, power conversion circuit 12, trigger circuit 02, switch trigger circuit 21, step-down circuit 22, main control circuit 03, battery 04, external power supply detection circuit 05, switch button K1, diode D11, first switch tube Q26, second switch tube Q13, third switch tube Q30, fourth switch tube Q22, fifth switch tube Q17, sixth switch tube Q29, seventh switch tube Q28, DC-DC power supply chip U4, voltage regulation chip U7.

[0052] The purpose, features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0053] It should be understood that the specific embodiments described herein are merely used to explain the technical solutions of the present application and are not intended to limit the present application.

[0054] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0055] This application proposes a power on / off circuit, which is applied to an electronic device, wherein the electronic device includes a battery 04, such as Figure 1 As shown, the power switch circuit includes a power supply circuit 01, a trigger circuit 02 and a main control circuit 03. The input terminals of the power supply circuit 01 and the trigger circuit 02 are connected to the output terminal of the battery 04. The power input terminal of the main control circuit 03 is connected to the output terminals of the trigger circuit 02 and the power supply circuit 01. The control terminal of the main control circuit 03 is connected to the controlled terminals of the power supply circuit 01 and the trigger circuit 02.

[0056] The power supply circuit 01 is used to process the power of the battery 04 and output it to the main control circuit 03 to supply power to the main control circuit 03; the trigger circuit 02 is used to respond to user operations, process the power of the battery 04 and output it to the main control circuit 03 to provide auxiliary power to the main control circuit 03;

[0057] The main control circuit 03 is awakened and starts working when the trigger circuit 02 provides auxiliary power; and outputs a corresponding power supply control signal to the power supply circuit 01 according to the user's operation instruction to start / shut down the power supply circuit 01; the main control circuit 03 is also used to output a shutdown control signal to the trigger circuit 02 when receiving the power signal output by the power supply circuit 01 to shut down the trigger circuit 02.

[0058] More specifically, the power-on / off circuit, as the core architecture of an electronic device's power management system, ensures reliable switching between operating states and precise control of the power supply path. This circuit typically consists of a power conversion module, a trigger signal processing unit, and a main control chip. The fundamental power consumption issue stems from the need to maintain power to essential functional units even in the shutdown state. In traditional designs, to implement basic features such as key-press wakeup and state memory, the main control microcontroller must remain in a low-power standby mode when the device is shut down. While this current is significantly lower than in the operating state, it still requires a microampere-level quiescent current to maintain register states and interrupt responsiveness. Furthermore, the main power supply circuit and the trigger circuit often share a common ground or power supply, resulting in leakage current in some functional modules through parasitic paths even in the shutdown state, further exacerbating energy loss. This structural flaw is particularly prominent in systems with small-capacity batteries. The cumulative effect can reduce standby time by 30% to 50% and increase the risk of battery failure during storage.

[0059] Existing technology addresses these issues primarily through two approaches: First, at the hardware level, specialized devices such as ultra-low quiescent current power chips and low-power microcontrollers are employed to reduce the basic power consumption of unit circuits and thereby slow down battery drain. However, the high cost of these devices significantly hinders the commercial viability of these products. Furthermore, despite the use of low-power devices, the shutdown power consumption of existing microcontroller power-on and power-off circuits still remains around several hundred microamperes (primarily due to the microcontroller's low-power mode). If the battery capacity is small, this still cannot withstand long-term storage and transportation. Second, at the system level, external wake-up power supplies or mechanical switches are introduced to attempt to achieve zero power consumption by physically severing the power supply path. However, such solutions can easily lead to loss of device status information and pose the risk of oxidation failure of mechanical contacts, making them difficult to meet the design requirements of intelligent and high-reliability modern electronic devices. A deeper contradiction lies in the fact that traditional solutions consistently struggle to overcome the technical paradox between "maintaining control logic" and "completely disconnecting power"—completely disconnecting the main control unit from power, thereby losing state retention and wake-up responsiveness; while retaining power inevitably results in quiescent current loss.

[0060] In response to the above problems, the present application proposes a power switch circuit, including a power supply circuit 01, a trigger circuit 02 and a main control circuit 03, wherein the input ends of the power supply circuit 01 and the trigger circuit 02 are respectively connected to the output end of the battery 04, and the power input end of the main control circuit 03 is connected to the output ends of the two, and its control end forms a closed-loop control link with the controlled ends of the power supply circuit 01 and the trigger circuit 02 respectively.

[0061] Power supply circuit 01 serves as the system's main energy channel, carrying out the core functions of voltage conversion and power distribution for battery 04. Its core components consist of a conversion module, a power switch array, and a power path management unit, integrating reverse blocking and overcurrent protection. In the shutdown state, power supply circuit 01 is in full cutoff mode, with its output physically isolated from the positive terminal of battery 04. When the main control circuit 03 issues an enable signal, the power switch turns on and activates the converter, converting the battery 04 voltage to the system's main operating voltage. Trigger circuit 02, dedicated to wake-up signal capture and transient power supply, consists of a key detection network and a voltage regulator. When a user presses a key, a transient pulse generated by mechanical contacts connects battery 04 and the voltage regulator for instantaneous power supply. Once the main control completes initialization, it checks whether the device is currently powered on (i.e., whether the user has activated the power button). Upon detecting the power button's activation, it assumes system control and immediately disconnects the power supply path to trigger circuit 02 via a pin feedback signal, ensuring that it operates only briefly during the wake-up phase, thereby reducing power consumption.

[0062] The power supply circuit 01 is responsible for converting the power of the battery 04 and providing the main working power to the main control circuit 03. The trigger circuit 02 conditions the power of the battery 04 in response to user operations and outputs auxiliary power to the main control circuit 03. The main control circuit 03 wakes up and starts working when the trigger circuit 02 is activated. It generates a power supply control signal according to the user's instructions to open and close the power supply circuit 01. At the same time, after the power supply circuit 01 is started, it reversely outputs a shutdown signal to the trigger circuit 02 to cut off its power supply path. This application reconstructs the power supply path relationship from the circuit architecture level and establishes a physical isolation mechanism between the main power supply and the trigger wake-up circuit. By setting up an independent dual-channel power supply system, the main control system is temporarily powered and started by the trigger circuit 02 only at the moment of wake-up. After initialization is completed, it immediately switches to the main power supply channel and synchronously shuts down the trigger circuit. Therefore, under the premise of maintaining complete control functions, the main control unit and the battery 04 are completely electrically isolated in the shutdown state. The system power consumption depends only on the physical characteristics of the battery 04 itself, achieving zero-power shutdown. At the same time, this solution, built on conventional standard components, ensures ultra-long battery life and extended storage and transport times while addressing the cost-performance imbalance inherent in traditional solutions due to their reliance on high-cost components. This solution achieves the ultra-long battery life and extended storage and transport times of products with built-in batteries. This application not only eliminates reliance on expensive, low-power components, but also, through structural innovation, enables conventional industrial-grade components to achieve or even exceed the power consumption control levels of specialized devices, providing a new technical path for the development of low-cost, ultra-long standby devices.

[0063] In one embodiment, if Figure 2As shown, the trigger circuit 02 includes a switch trigger circuit 21 and a step-down circuit 22, the input end of the switch trigger circuit 21 is connected to the output end of the battery 04, the output end of the switch trigger circuit 21 is connected to the input end of the step-down circuit 22, and the output end of the step-down circuit 22 is connected to the power input end of the main control circuit 03; the switch trigger circuit 21 is used to conduct the connection between the battery 04 and the step-down circuit 22 when operated by the user; when the connection between the step-down circuit 22 and the battery 04 is conducted, it is used to step down the power supply of the battery 04 and output it to the main control circuit 03, so as to provide auxiliary power to the main control circuit 03.

[0064] In this embodiment, trigger circuit 02 constructs a zero-static-power wake-up channel that activates instantaneously only upon user operation through a cascaded configuration of a switch trigger circuit 21 and a buck circuit 22. This decouples the traditional continuously operating trigger module into a mechanical control path and an electrical energy conversion path. Through the precise coordination of physical action and electronic control, energy consumption during the wake-up process is minimized. The switch trigger circuit 21 serves as the physical interface for user operation and is essentially a hybrid mechanical-electronic control node. Its hardware architecture comprises a physical key unit and an electronic switch device. Normally, the physical key is off, and the gate of the electronic switch device is maintained at a low level by a pull-down resistor, ensuring complete isolation between the positive terminal of battery 04 and the input of buck circuit 22. When the user presses the key, the mechanical contacts close, causing the gate potential to rise instantaneously, driving the switch transistor to conduct and establish a current path from battery 04 to buck circuit 22. Buck circuit 22 comprises a voltage-stabilizing chip. When switch trigger circuit 21 is turned on, the voltage of battery 04 is applied to the input of buck circuit 22 via the electronic switch. The voltage regulator chip immediately begins operating, reducing the voltage of battery 04 to the operating voltage required by the main control chip. Upon waking up, the main control chip immediately checks whether the device is currently powered on. If the power button is pressed, it takes over system control, maintaining operation via the main power supply. After the main control completes startup, it uses a pin feedback signal to shut off the power supply to trigger circuit 02, ensuring that it operates only briefly during the wakeup phase, thereby reducing power consumption.

[0065] This embodiment uses a complete link of mechanical action triggering, electronic switch conduction, voltage stabilization output, and master control takeover to complete system wake-up without the need for continuous power consumption, using only the instantaneous energy during user operation, thereby solving the standby loss problem caused by long-term power supply of the trigger circuit 02 in traditional solutions.

[0066] In one embodiment, if Figure 3As shown, the switch trigger circuit 21 includes a switch button K1, a first switch tube Q26 and a second switch tube Q13; one end of the switch button K1 is connected to the output end of the battery 04, and the other end is connected to the controlled end of the first switch tube Q26; the input end of the first switch tube Q26 is connected to the controlled end of the second switch tube Q13, and the output end of the first switch tube Q26 is grounded; the input end and the controlled end of the second switch tube Q13 are connected to the output end of the battery 04, and the output end of the second switch tube Q13 is connected to the step-down The input end of the circuit 22 is connected; wherein, when the switch button K1 is operated by the user to the power-on state, the first switch tube Q26 is controlled to be turned on and the second switch tube Q13 is controlled to be turned on, so that the step-down circuit 22 steps down the power supply of the battery 04 into an auxiliary power supply voltage and outputs it to the main control circuit 03; the input end of the main control circuit 03 is connected to one end of the switch button K1, and is also used to receive and output a corresponding power supply control signal to the power supply circuit 01 according to the voltage of the switch button K1, so as to start / shut down the power supply circuit 01.

[0067] In this embodiment, the switch trigger circuit 21 utilizes a two-stage cascaded switch design to create a low-power wake-up channel triggered by mechanical operation. This dual-transistor interlocking mechanism completely blocks quiescent current while ensuring that user operations can reliably trigger system startup. The switch button K1 serves as the physical interface between the user and the device and is essentially a mechanical energy injection node. Its internal structure consists of a metal spring, contact points, and an insulating housing. Normally, the contacts are physically separated. When the button is not pressed, the electrical connection between its two ends is completely disconnected, forming a physical energy isolation barrier. When the user presses the button, the mechanical structure forces the contacts to close, directly transmitting the battery O4 voltage to the control terminal of the first switch Q26. This process essentially converts the mechanical energy of human operation into an electrical energy signal for the control circuit. The gate of the first switch Q26 is connected to the switch button K1 via a current-limiting resistor, the source is grounded, and the drain is connected to the control circuit of the second switch Q13. A pull-down resistor is connected in parallel between the gate and source to ensure a positive off state when not triggered. When the button is not triggered, the pull-down resistor locks the gate potential at ground level, keeping the switch off. When the button is pressed, the voltage from battery O4 is directly connected to the gate through the button, creating a gate-source voltage difference that exceeds the threshold voltage, turning the switch on. This creates a low-impedance path between the drain and source, forcing the control terminal of the second switch Q13 down, completing the transmission of the primary control signal.

[0068] The second switch tube Q13 serves as the main energy channel switch. Its source is directly connected to the positive electrode of the battery 04, the drain is connected to the input terminal of the step-down circuit 22, and the gate is pulled up to the voltage of the battery 04 through a resistor. The unique back-to-back connection method forms a bidirectional cutoff characteristic, completely blocking the potential leakage path in the shutdown state. Under normal conditions, the gate pull-up resistor maintains the same potential as the source, the second switch tube Q13 is in the off state, and the battery 04 is completely isolated from the step-down circuit 22. When the first switch tube Q26 is turned on, the gate potential is pulled down to near the ground level. At this time, a sufficient voltage difference is formed between the source and the gate, prompting the second switch tube Q13 to turn on. The battery 04 electric energy is then injected into the step-down circuit 22 through this tube, completing the establishment of the main energy channel. It is worth noting that in this application, the first switch tube Q26 and the second switch use N-type and P-type switch tubes respectively, thereby forming a back-to-back connection method. The main control chip's detection pin is connected to the key node via a high-impedance input circuit. Its integrated Schmitt trigger and software filtering algorithm ensure rapid response to valid operations while filtering out environmental interference. When the key is not pressed, the detection pin maintains a low level via an internal weak pull-up. When the key is triggered, turning on the first and second switches Q13, the voltage of battery O4 is directly applied to the main control circuit O3 via the voltage regulator chip, triggering its awakening.

[0069] In one embodiment, the switch trigger circuit 21 further includes a diode D11 and a third switch Q30. The anode of the diode D11 is connected to the controlled terminal of the first switch Q26, and the cathode is connected to the input terminal of the third switch Q30. The controlled terminal of the third switch Q30 is connected to the main control circuit 03, and the output terminal of the third switch Q30 is grounded. Upon receiving the power signal output by the power supply circuit 01, the main control circuit 03 is configured to output a shutdown control signal to the third switch Q30, thereby controlling the third switch Q30 to turn off and thereby control the first switch Q26 to turn off, thereby shutting down the trigger circuit 02. In this embodiment, by introducing the diode D11 and the third switch Q30, an active shutdown mechanism for the main control circuit 03 to shut down the trigger circuit 02 is established, achieving intelligent closed-loop control of the trigger channel. This configuration, while retaining the original wake-up function, gives the system the ability to autonomously disconnect the trigger path, forming a complete power-on-run-shutdown logic chain.

[0070] Diode D11 is a silicon-based PN junction device, and its forward conduction voltage drop characteristic is the core of its function. Under normal conditions, diode D11 is in reverse blocking, blocking interference from the main control shutdown signal on the trigger path. When the third switch Q30 is controlled to conduct, diode D11 conducts forward, forming a low-impedance path, forcibly pulling the control terminal of the first switch Q26 low. This ensures unidirectional conduction of the control signal—the main control shutdown command can affect trigger circuit O2, but the triggering action will not reversely interfere with main control circuit O3. The gate of the third switch Q30 is connected to the main control pin via a current-limiting resistor, the source is grounded, and the drain is directly connected to the cathode of diode D11, forming a controlled discharge circuit. When the main control does not output a shutdown signal, the gate remains low, and the third switch Q30 remains off, with no impact on trigger circuit O2. When the main control determines that the trigger channel needs to be disabled, the pin outputs a high level, driving the third switch Q30 into conduction, establishing a current path from the cathode of diode D11 to ground. At this point, diode D11 conducts forward, pulling the control terminal of first switch Q26 down to near ground, forcing it to shut down. When the user presses a button, even if the main control is already active, the reverse-blocking nature of diode D11 prevents the third switch Q30 from shunting the control current injected by the button, ensuring the complete transmission of the trigger signal.

[0071] In the previous embodiment, the activation and deactivation of trigger circuit 02 was controlled by first switch Q26 and second switch Q13. In this embodiment, the master control outputs a shutdown signal to third switch Q30 when its internal state machine determines that the trigger path needs to be disconnected (i.e., when power supply circuit 01 is detected to be on). When third switch Q30 turns on, diode D11 latches the control terminal of first switch Q26 at a low level, forcibly disconnecting the trigger path even if the key is still pressed. When first switch Q26 turns off, second switch Q13 is simultaneously disconnected, physically isolating battery 04 from step-down circuit 22 and completely eliminating potential leakage risks in the shutdown state. Diode D11 and third switch Q30 form a logical OR gate, giving the master control shutdown command priority over manual user input, ensuring that trigger circuit 02 shuts down after completing the instantaneous power supply, thereby reducing power consumption.

[0072] In one embodiment, if Figure 2As shown, the power supply circuit 01 also includes a power supply switch circuit 11 and a power conversion circuit 12. The input end of the power supply switch circuit 11 is connected to the output end of the battery 04, the output end of the power supply switch circuit 11 is connected to the input end of the power conversion circuit 12, the controlled end of the power supply switch circuit 11 is connected to the output end of the main control circuit 03, and the output end of the power conversion circuit 12 is connected to the power input end of the main control circuit 03; the power supply switch circuit 11 is used to receive and turn on / off the connection between the battery 04 and the power conversion circuit 12 according to the power supply control signal output by the main control circuit 03; the power conversion circuit 12 is used to process and output the power of the battery 04.

[0073] In this embodiment, the power supply circuit 01 dynamically manages the power supply from the battery 04 to the system's core through the collaborative architecture of the power switch circuit 11 and the power conversion circuit 12. This decouples power path control from power processing functions, forming a phased, programmable energy supply system while granting the main control circuit 03 global control over the power supply chain. The power switch circuit 11 is a controlled power switch, responsible for on / off control of the battery 04 and subsequent circuits. Its hardware core consists of a power switch device. Its input is directly connected to the positive terminal of the battery 04, its output is connected to the power conversion circuit 12, and its controlled end is connected to the output pin of the main control circuit 03 via an isolation circuit. When the system is shut down, the main control circuit 03 remains dormant, the control terminal of the power switch circuit 11 remains low, and the power switch device is in the off state, completely severing the physical connection between the battery 04 and the power conversion circuit 12. When the main control circuit is awakened by the trigger circuit 02, it outputs a specific level signal (usually a high level) via the GPIO, driving the power switch to conduct, establishing a low-impedance path from the battery 04 to the power conversion circuit 12. The electronic switch characteristics formed by this process have the advantages of no contact wear and fast response speed (microsecond level) compared to traditional mechanical relays. The power conversion circuit 12 integrates voltage conversion and overload protection functions, and the typical architecture includes a DC-DC conversion module and a voltage regulator. When the power supply switch circuit 11 is turned on, the DC-DC converter is immediately started to reduce the battery 04 voltage to the operating voltage of the main control circuit 03. In one embodiment of the present application, Figure 4 As shown, the power conversion circuit 12 includes a DC-DC power chip U4 and a voltage regulation chip U7.

[0074] In one embodiment, if Figure 3As shown, the power supply switch circuit 11 includes a fourth switch tube Q22 and a fifth switch tube Q17; the input end of the fourth switch tube Q22 is connected to the controlled end of the fifth switch tube Q17, the output end of the fourth switch tube Q22 is grounded, and the controlled end of the fourth switch tube Q22 is connected to the output end of the main control circuit 03; the input end of the fifth switch tube Q17 is connected to the output end of the battery 04, and the output end of the fifth switch tube Q17 is connected to the input end of the power conversion circuit 12; the main control circuit 03 is used to output a corresponding power supply control signal according to a user operation instruction, and control the fourth switch tube Q22 to be turned on / off and then the fifth switch tube Q17 to be turned on / off, so as to connect / disconnect the connection between the battery 04 and the power conversion circuit 12.

[0075] In this embodiment, the power switch circuit 11, through a cascaded architecture consisting of a fourth switch Q22 and a fifth switch Q17, implements low-loss, high-reliability on / off control between the battery 04 and the power conversion circuit 12. This physically isolates the control logic from the power path, ensuring the safety of the main control circuit 03 while providing precise management of the main power supply path. The fourth switch Q22 converts the low-voltage logic signal output by the main control into a drive signal suitable for driving the high-side power switch. Its input is connected to the control terminal of the fifth switch Q17 via a current-limiting resistor, and its output is directly connected to ground, forming a basic signal conversion loop. When the main control outputs a high-level power control signal, the control terminal of the fourth switch Q22 receives sufficient drive voltage, establishing an internal carrier channel and forming a low-impedance path between the output terminal and ground. At this point, the control terminal potential of the fifth switch Q17 is forced down to near ground level, triggering its conduction. Conversely, when the main control outputs a low-level signal, the fourth switch Q22 immediately turns off, terminating its ability to control the voltage level of the control terminal of the fifth switch Q17.

[0076] The input of the fifth switch Q17 is directly connected to the positive terminal of the battery O4, and the output is connected to the input of the power conversion circuit 12. The control terminal is regulated by the fourth switch Q22. In the inactive state, the control terminal of the fifth switch Q17 is maintained at the same potential as the input terminal via an internal or external pull-up resistor. At this time, the source-gate voltage difference is zero, and the device remains in the off state. When the fourth switch Q22 is turned on, the control terminal potential is pulled down to a low level, forming a reverse voltage difference between the source and gate that exceeds the threshold voltage, prompting the formation of a conductive channel. At this time, the power energy of the battery O4 is injected into the power conversion circuit 12 through a low on-resistance path. During the shutdown phase: the main control output is low → the fourth switch Q22 is turned off → the control terminal potential of the fifth switch Q17 rises → the source-gate voltage difference disappears → the conductive channel is closed → the main power path is completely disconnected.

[0077] The ground reference of the fourth switch Q22 is electrically isolated from the battery O4 reference of the fifth switch Q17, preventing power supply fluctuations from interfering with the main control signal. In the off state, neither the fourth nor the fifth switch Q17 consumes continuous current from their control terminals, reducing system standby power consumption to near zero. The drive strength of the fourth switch Q22 is automatically matched to the gate charge requirements of the fifth switch Q17, ensuring fast and reliable switching. This cascaded switch architecture, through the combination of low-voltage control and high-voltage execution, simplifies circuit complexity while enabling intelligent management of the power path.

[0078] In one embodiment, if Figure 2 and Figure 5 As shown, it also includes:

[0079] The external power supply detection circuit 05 has an input end connected to the external power supply and an output end connected to the main control circuit 03, and is used to detect the access status of the external power supply and output an external power-off signal to the main control circuit 03 when the external power supply is off; wherein, the main control circuit 03 is also used to output a corresponding control signal to the trigger circuit 02 when receiving the external power-off signal output by the external power supply detection circuit 05, so that the trigger circuit 02 processes the power supply of the battery 04 and outputs it to the main control circuit 03, so as to provide auxiliary power to the main control circuit 03.

[0080] In this embodiment, by introducing a collaborative control mechanism between the external power supply detection circuit 05 and the main control circuit 03, an intelligent switching function between the external power supply and the battery 04 is realized, ensuring that the system can seamlessly switch to the battery 04 for power supply when the external power supply is accidentally disconnected, maintaining the continuous operation of the core control unit, and building a dual power supply guarantee system. The hardware architecture of the external power supply detection circuit 05 includes a voltage sampling network, the input end of which is connected to the external power supply interface, and the output end is connected to the sampling input pin of the main control circuit 03. When the external power supply is connected, the sampling module extracts the power supply voltage signal in real time and outputs it to the main control circuit 03. The main control circuit 03 has an integrated power management state machine and an interrupt response module. After receiving the external leave signal (that is, the voltage drops below the threshold), the preset power switching program is immediately triggered, and a control instruction with a specific timing is output to the trigger circuit 02 through the high-speed GPIO port.

[0081] In this application, the controlled end of trigger circuit 02 is controlled not only by switch button K1 but also by an external detection circuit. At the moment the external power source is disconnected, the main control outputs a pulse signal to turn on the switch in trigger circuit 02. Battery 04's power is processed by power conversion circuit 12 and then replaced with the external power source. After the switch is complete, the main control continuously monitors the status of the external power interface, preparing to perform a reverse switching operation when the external power source is restored. This solution enables the transition of power supply systems from passive response to active management, providing a highly interruption-resistant power supply solution for critical equipment.

[0082] In one embodiment, if Figure 3 As shown, the switch trigger circuit 21 also includes a sixth switch tube Q29 and a seventh switch tube Q28; a controlled end of the sixth switch tube Q29 is connected to the output end of the main control circuit 03, an input end of the sixth switch tube Q29 is connected to the controlled end of the seventh switch tube Q28, and an output end of the sixth switch tube Q29 is grounded; an input end of the seventh switch tube Q28 is connected to the output end of the battery 04, and an output end of the seventh switch tube Q28 is connected to the controlled end of the first switch tube Q26; wherein, the main control circuit 03 is further configured to, upon receiving the external power off signal output by the external power detection circuit 05, control the sixth switch tube Q29 and the seventh switch tube Q28 to turn on, thereby controlling the first switch tube Q26 to turn on, thereby starting the trigger circuit 02.

[0083] In this embodiment, the switch trigger circuit 21 implements the indirect driving function of the main control circuit 03 on the trigger circuit 02 through a cascade control architecture of the sixth switch Q29 and the seventh switch Q28. The input terminal of the sixth switch Q29 is connected to the control terminal of the seventh switch Q28 via a current-limiting resistor, and the output terminal is directly grounded, forming a closed loop. When the main control circuit 03 outputs a high-level drive signal, the control terminal of the sixth switch Q29 receives sufficient voltage to conduct, forming a low-impedance path between its drain and source, forcibly pulling the control terminal of the seventh switch Q28 down to near ground level. At this point, an effective voltage difference forms between the control terminal and the input terminal of the seventh switch Q28, triggering its conduction. If the main control output is low, the sixth switch Q29 immediately turns off, terminating the pull-down effect on the control terminal of the seventh switch Q28. The seventh switch Q28 is responsible for directing the injection of battery 04's electrical energy into the control terminal of the first switch Q26 of the trigger circuit 02. Its input terminal is directly connected to the positive terminal of the battery 04, and its output terminal is connected to the control terminal of the first switch Q26 via a current-limiting protection element. Under normal conditions, the control terminal of the seventh switch Q28 is maintained at the same potential as the input terminal via a pull-up resistor, resulting in a zero source-gate voltage differential and maintaining the device in the off state. When the sixth switch Q29 turns on, causing the control terminal potential to drop, a reverse voltage differential exceeding the threshold voltage is generated between the source and gate, rapidly establishing a conductive channel. At this point, the battery 04 voltage is applied to the control terminal of the first switch Q26 via a low-impedance path, providing it with sufficient drive voltage to activate the trigger circuit 02.

[0084] Upon receiving the external power off signal from the external power detection circuit 05, the main control circuit 03 outputs a high level to the control terminal of the sixth switch Q29. This turns on the sixth switch Q29, forming a ground path. The control terminal of the seventh switch Q28 is pulled down, triggering conduction due to the source-gate voltage difference. The battery 04 voltage is then output via the seventh switch Q28 to the control terminal of the first switch Q26. Similarly, the sixth switch Q29 and the seventh switch Q28 are N-type and P-type, respectively, forming a back-to-back connection, completely blocking potential leakage paths in the shutdown state. It is worth noting that the control signal in this embodiment is output by the main control circuit 03 based on the sampling signal from the external power detection circuit 05. This means that when the external power is off, the main control circuit 03 outputs a high level to the sixth switch Q29, thereby turning on the sixth switch Q29 and the seventh switch Q28, and activating the trigger circuit 02.

[0085] In addition, to achieve the above-mentioned purpose, the present application also proposes an electronic device, comprising a battery 04 and a switch circuit as described above. The switch circuit is applied to an electronic device, wherein the electronic device comprises a battery 04, and the switch circuit comprises a power supply circuit 01, a trigger circuit 02 and a main control circuit 03. The input end of the power supply circuit 01 and the trigger circuit 02 are connected to the output end of the battery 04, the power input end of the main control circuit 03 is connected to the output end of the trigger circuit 02 and the power supply circuit 01, and the control end of the main control circuit 03 is connected to the controlled end of the power supply circuit 01 and the trigger circuit 02; the power supply circuit 01 is used to process the power supply of the battery 04 and output it to the main control circuit 03 to supply power to the main control circuit 03. The trigger circuit 02 is used to respond to user operations, process the power of the battery 04 and output it to the main control circuit 03, so as to provide auxiliary power to the main control circuit 03; the main control circuit 03 is awakened and starts working when the trigger circuit 02 provides auxiliary power; and outputs a corresponding power supply control signal to the power supply circuit 01 according to the user operation instruction, so as to start / shut down the power supply circuit 01; the main control circuit 03 is also used to output a shutdown control signal to the trigger circuit 02 when receiving the power signal output by the power supply circuit 01, so as to shut down the trigger circuit 02.

[0086] The power supply circuit 01 is responsible for converting the power of the battery 04 and providing the main working power to the main control circuit 03. The trigger circuit 02 conditions the power of the battery 04 in response to user operations and outputs auxiliary power to the main control circuit 03. The main control circuit 03 wakes up and starts working when the trigger circuit 02 is activated. It generates a power supply control signal according to the user's instructions to open and close the power supply circuit 01. At the same time, after the power supply circuit 01 is started, it reversely outputs a shutdown signal to the trigger circuit 02 to cut off its power supply path. This application reconstructs the power supply path relationship from the circuit architecture level and establishes a physical isolation mechanism between the main power supply and the trigger wake-up circuit. By setting up an independent dual-channel power supply system, the main control system is temporarily powered and started by the trigger circuit 02 only at the moment of wake-up. After initialization is completed, it immediately switches to the main power supply channel and synchronously shuts down the trigger circuit. Therefore, under the premise of maintaining complete control functions, the main control unit and the battery 04 are completely electrically isolated in the shutdown state. The system power consumption depends only on the physical characteristics of the battery 04 itself, achieving zero-power shutdown. At the same time, this solution, built on conventional standard components, ensures ultra-long battery life and extended storage and transport times while addressing the cost-performance imbalance inherent in traditional solutions due to their reliance on high-cost components. This solution achieves the ultra-long battery life and extended storage and transport times of products with built-in batteries. This application not only eliminates reliance on expensive, low-power components, but also, through structural innovation, enables conventional industrial-grade components to achieve or even exceed the power consumption control levels of specialized devices, providing a new technical path for the development of low-cost, ultra-long standby devices.

[0087] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the switch circuit of the present application. More simple transformations based on this technical concept are all within the scope of protection of the present application.

[0088] In addition, to achieve the above purpose, the present application also proposes a power on / off control method, such as Figure 6 and Figure 7 As shown, based on the above-mentioned power on / off circuit implementation, it includes:

[0089] S110: In the off state, the user operates the device to be turned on and started; the user generates a power-on instruction through an interaction method such as a physical button, a touch sensor, or a wireless signal.

[0090] S120: In response to a user operation, trigger circuit 02 processes the power from battery 04 and outputs it to main control circuit 03, providing auxiliary power to main control circuit 03. Upon receiving the operation signal, trigger circuit 02 rapidly switches on its internal switch, converting the level of the original power from battery 04 to generate an auxiliary power supply that meets the operating requirements of main control circuit 03. At this point, trigger circuit 02 temporarily assumes the role of the system's "startup engine," providing the energy required for initialization of the main control circuit.

[0091] S130: Based on the auxiliary power provided by trigger circuit 02, main control circuit 03 awakens and starts operating. It also outputs a power control signal to power supply circuit 01, activating it. After auxiliary power is applied to the power pin of main control circuit 03, its internal voltage monitoring module detects active power and sequentially executes the startup process, including de-energizing the reset signal, activating the clock system, and initializing registers. The main control switches from deep sleep mode to full-function operation, completing the transition from "unconscious" to "decision-making." Immediately after startup, the main control detects whether switch K1 is in the on state. If so, it outputs a power control signal with a specific timing sequence through the GPIO port, turning on the power switch in power supply circuit 01. At this point, the main power path is officially established, and the system enters the stable power supply phase.

[0092] S140: As power supply circuit 01 begins supplying power, main control circuit 03 outputs a shutdown control signal to trigger circuit 02, thereby shutting down trigger circuit 02. Upon detecting that the output voltage of power supply circuit 01 has reached a steady-state threshold, main control circuit 03 outputs a logic signal to the control terminal of trigger circuit 02, causing its internal switching devices to shut down in an orderly manner. This step passes the "startup baton," eliminating static power consumption in the redundant power supply path and freeing up resources in trigger circuit 02 for the next startup.

[0093] S210: When the system is in the on state, the user switches the system to the off state by operating the system for a long time, such as by pressing a button or using a motion sensor. After receiving the command, the main control circuit 03 starts the off pre-processing procedure to ensure that the system state is safely preserved.

[0094] S220: Main control circuit 03 outputs a power supply control signal to power supply circuit 01, shutting it down. After completing preprocessing, the main control circuit gradually removes the control signal from power supply circuit 01, orderly shutting down each power domain through a tiered voltage reduction method. Ultimately, the main power supply path is disconnected, returning the entire system to a microampere-level standby power consumption state. At this point, only the necessary wake-up circuits remain operational, awaiting the next trigger event.

[0095] The above description is only part of the embodiments of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made by using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A power on / off circuit, applied to an electronic device, wherein the electronic device includes a battery, characterized in that: The power on / off circuit includes a power supply circuit, a trigger circuit, and a main control circuit. The input terminals of the power supply circuit and the trigger circuit are connected to the output terminal of the battery. The power input terminal of the main control circuit is connected to the output terminals of the trigger circuit and the power supply circuit. The control terminal of the main control circuit is connected to the controlled terminals of the power supply circuit and the trigger circuit. The power supply circuit is used to process the power of the battery and output it to the main control circuit to supply power to the main control circuit; The trigger circuit is configured to process the power of the battery and output the power to the main control circuit in response to a user operation, so as to provide auxiliary power to the main control circuit; The main control circuit is awakened and starts working when the trigger circuit provides auxiliary power; and outputs a corresponding power supply control signal to the power supply circuit according to the user operation instruction to start / stop the power supply circuit; The main control circuit is further configured to output a shutdown control signal to the trigger circuit when receiving a power signal output by the power supply circuit, so as to shut down the trigger circuit.

2. The power on / off circuit according to claim 1, wherein: The trigger circuit includes a switch trigger circuit and a step-down circuit, wherein the input end of the switch trigger circuit is connected to the output end of the battery, the output end of the switch trigger circuit is connected to the input end of the step-down circuit, and the output end of the step-down circuit is connected to the power input end of the main control circuit; The switch trigger circuit is used to connect the battery and the step-down circuit when operated by the user; When the connection between the step-down circuit and the battery is turned on, the step-down circuit is used to step down the power of the battery and output it to the main control circuit to provide auxiliary power to the main control circuit.

3. The power on / off circuit according to claim 2, wherein: The switch trigger circuit includes a switch button, a first switch tube and a second switch tube; One end of the switch button is connected to the output end of the battery, and the other end is connected to the controlled end of the first switch tube; the input end of the first switch tube is connected to the controlled end of the second switch tube, and the output end of the first switch tube is grounded; the input end and the controlled end of the second switch tube are connected to the output end of the battery, and the output end of the second switch tube is connected to the input end of the step-down circuit; When the switch button is turned on by the user, the first switch tube is turned on and the second switch tube is turned on, so that the step-down circuit steps down the power supply of the battery into an auxiliary power supply voltage and outputs it to the main control circuit; The input end of the main control circuit is connected to one end of the switch button, and is also used to receive and output a corresponding power supply control signal to the power supply circuit according to the voltage of the switch button to start / stop the power supply circuit.

4. The power on / off circuit according to claim 3, wherein: The switch trigger circuit also includes a diode and a third switch tube; The anode of the diode is connected to the controlled terminal of the first switch tube, and the cathode is connected to the input terminal of the third switch tube; the controlled terminal of the third switch tube is connected to the main control circuit, and the output terminal of the third switch tube is grounded; The main control circuit is used to output a shutdown control signal to the third switch tube when receiving the power signal output by the power supply circuit, and control the third switch tube to be disconnected and then control the first switch tube to be disconnected to turn off the trigger circuit.

5. The power on / off circuit according to claim 1, wherein: The power supply circuit further includes a power supply switch circuit and a power conversion circuit, wherein the input end of the power supply switch circuit is connected to the output end of the battery, the output end of the power supply switch circuit is connected to the input end of the power conversion circuit, the controlled end of the power supply switch circuit is connected to the output end of the main control circuit, and the output end of the power conversion circuit is connected to the power input end of the main control circuit; The power switch circuit is used to receive and, according to the power control signal output by the main control circuit, switch on / off the connection between the battery and the power conversion circuit; The power conversion circuit is used to process and output the power of the battery.

6. The power on / off circuit according to claim 2, wherein: The power supply switch circuit includes a fourth switch tube and a fifth switch tube; The input end of the fourth switching tube is connected to the controlled end of the fifth switching tube, the output end of the fourth switching tube is grounded, and the controlled end of the fourth switching tube is connected to the output end of the main control circuit; the input end of the fifth switching tube is connected to the output end of the battery, and the output end of the fifth switching tube is connected to the input end of the power conversion circuit; The main control circuit is used to output a corresponding power supply control signal according to a user operation instruction, and to control the fourth switch tube to be turned on / off and then the fifth switch tube to be turned on / off, so as to turn on / off the connection between the battery and the power conversion circuit.

7. The power on / off circuit according to claim 1, wherein: Also includes: An external power supply detection circuit, having an input end connected to an external power supply and an output end connected to the main control circuit, for detecting the connection of an external power supply and outputting an external power off signal to the main control circuit when the external power supply is off; In which, the main control circuit is also used to output a corresponding control signal to the trigger circuit when receiving the external leave signal output by the external power supply detection circuit, so that the trigger circuit processes the power of the battery and outputs it to the main control circuit to provide auxiliary power to the main control circuit.

8. The power on / off circuit according to claim 3, wherein: The switch trigger circuit further includes a sixth switch tube and a seventh switch tube; The controlled terminal of the sixth switch tube is connected to the output terminal of the main control circuit, the input terminal of the sixth switch tube is connected to the controlled terminal of the seventh switch tube, and the output terminal of the sixth switch tube is grounded; the input terminal of the seventh switch tube is connected to the output terminal of the battery, and the output terminal of the seventh switch tube is connected to the controlled terminal of the first switch tube; The main control circuit is further configured to control the sixth and seventh switch tubes to be turned on and then control the first switch tube to be turned on when receiving the external power off signal output by the external power detection circuit, so as to start the trigger circuit.

9. An electronic device, characterized in that: The invention comprises a battery and a switch circuit as claimed in any one of claims 1 to 8.

10. A power on / off control method, implemented based on the power on / off circuit according to any one of claims 1 to 8, characterized in that: include: In the shutdown state, the user operates the device to the power-on state and starts it; The trigger circuit responds to user operation, processes the power of the battery and outputs it to the main control circuit to provide auxiliary power to the main control circuit; Based on the auxiliary power provided by the trigger circuit, the main control circuit is awakened and starts working; and outputting a power supply control signal to the power supply circuit to start the power supply circuit; Based on the power supply circuit starting to supply power, the main control circuit outputs a shutdown control signal to the trigger circuit to shut down the trigger circuit; When the device is in the on state, it is turned off by the user; The main control circuit outputs a power supply control signal to the power supply circuit to shut down the power supply circuit.

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