Delay power-off circuit and electronic equipment

Abstract

The utility model relates to a time-delay power-off circuit and electronic equipment, and the time-delay power-off circuit is located in the electronic equipment and comprises a power management module, a capacitor module and a time-delay switch module, and the power management module is used for responding to a condition that the voltage received by a capacitor monitoring end is greater than a first preset threshold value; a first starting signal is provided for the control end of the time delay switch module through the time delay switch control end; and the time delay switch module is used for responding to the first starting signal received by the control end and providing the power supply signal or the capacitor discharging signal received by the first end to the second end. According to the delay power-off circuit provided by the invention, delay start and delay turn-off of power-on and power-off of the electronic equipment can be realized, so that the security and the non-volatility of internal data of the electronic equipment are improved, and meanwhile, the problems of file system damage, hardware damage and the like are avoided.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electronic circuits, and in particular to a delayed power-off circuit and electronic equipment. Background Art

[0002] When shutting down electronic devices (such as computers and servers), they must follow a specific shutdown procedure to ensure a proper shutdown. Sudden power outages—that is, when power is cut off without following a normal shutdown procedure—can lead to risks and potential impacts, such as data loss, file system corruption, and hardware damage. Utility Model Content

[0003] In order to solve the above technical problems, the present disclosure provides a delayed power-off circuit and an electronic device.

[0004] The present disclosure provides a delayed power-off circuit, which is located in an electronic device. The delayed power-off circuit includes a power management module, a capacitor module and a delay switch module. The electronic device also includes a back-end module, wherein: the power management module includes a capacitor monitoring terminal and a delay switch control terminal; the capacitor module includes a first terminal and a second terminal; the delay switch module includes a control terminal, a first terminal and a second terminal; the capacitor monitoring terminal of the power management module is connected to the first terminal of the capacitor module, and the delay switch control terminal of the power management module is connected to the control terminal of the delay switch module; the first terminal of the capacitor module is also used to connect to an external power supply and receive a power signal provided by the external power supply, and the capacitor module The second end is grounded; the first end of the delay switch module is used to connect to the external power supply and receive the power signal provided by the external power supply, the first end of the delay switch module is also connected to the first end of the capacitor module and used to receive the capacitor discharge signal provided by the capacitor module, and the second end of the delay switch module is connected to the back-end module; the power management module is used to provide a first start signal to the control end of the delay switch module through the delay switch control end in response to the voltage received by the capacitor monitoring end being greater than a first preset threshold; the delay switch module is used to provide the power signal or the capacitor discharge signal received by the first end to the second end in response to the control end receiving the first start signal.

[0005] Optionally, the delayed power-off circuit also includes a first switch unit, which includes a control electrode, a first electrode and a second electrode; the power management module also includes a first switch control end, which is connected to the control electrode of the first switch unit; the first electrode of the first switch unit is used to connect to the external power supply and receive the power signal provided by the external power supply, and the second electrode of the first switch unit is connected to the first end of the capacitor module; the power management module is also used to provide a second start signal to the control electrode of the first switch unit through the first switch control end; the first switch unit is used to provide the power signal received by the first electrode to the second electrode in response to the control electrode receiving the second start signal, or the first switch unit is used to provide the capacitor discharge signal received by the second electrode to the first electrode in response to the control electrode receiving the second start signal.

[0006] Optionally, the delayed power-off circuit further includes a first inductor connected between the first switch unit and the capacitor module.

[0007] Optionally, the delayed power-off circuit also includes a second switch unit, which includes a control electrode, a first electrode and a second electrode; the power management module also includes a second switch control end, which is connected to the control electrode of the second switch unit; the second electrode of the second switch unit is used to connect to the external power supply and receive the power signal provided by the external power supply, and the first electrode of the second switch unit is connected to the first end of the capacitor module and the first end of the delay switch module; the power management module is also used to provide a third start signal to the control electrode of the second switch unit through the second switch control end; the second switch unit is used to provide the power signal received by the second electrode to the first electrode in response to the control electrode receiving the third start signal.

[0008] Optionally, the capacitor module includes at least two supercapacitors connected in series.

[0009] Optionally, the nominal capacity of the supercapacitor is greater than or equal to 50F.

[0010] Optionally, the delay switch module includes a first sub-switch and a second sub-switch, and the first sub-switch and the second sub-switch both include a control electrode, a first electrode and a second electrode; the control electrode of the first sub-switch serves as the control end of the delay switch module, the second electrode of the first sub-switch is grounded, and the first electrode of the first sub-switch is connected to the control electrode of the second sub-switch; the first electrode of the second sub-switch serves as the second end of the delay switch module, and the second electrode of the second sub-switch serves as the first end of the delay switch module.

[0011] Optionally, the power management module is an LTC3350 chip.

[0012] Based on the same utility model concept, the present disclosure also provides an electronic device, comprising any one of the delayed power-off circuits and a back-end module.

[0013] Optionally, the back-end module includes a storage module reading interface.

[0014] The technical solution provided by the present disclosure has the following advantages over the existing technology: the delayed power-off circuit provided by the present disclosure can realize delayed startup and delayed shutdown of electronic equipment, thereby improving the security and non-volatility of internal data of electronic equipment, while avoiding problems such as file system damage and hardware damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0016] In order to more clearly illustrate the embodiments of the present disclosure 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.

[0017] Figure 1 A schematic structural diagram of a delayed power-off circuit and an electronic device provided in an embodiment of the present disclosure;

[0018] Figure 2 A schematic structural diagram of another delayed power-off circuit and electronic device provided in an embodiment of the present disclosure;

[0019] Figure 3 A schematic structural diagram of another delayed power-off circuit and electronic device provided in an embodiment of the present disclosure;

[0020] Figure 4 A schematic structural diagram of another delayed power-off circuit and electronic device provided in an embodiment of the present disclosure;

[0021] Figure 5 A schematic diagram of the specific structure of a capacitor module provided in an embodiment of the present disclosure;

[0022] Figure 6 A schematic diagram of the specific structure of a delay switch module provided in an embodiment of the present disclosure;

[0023] Figure 7 A schematic diagram of the specific structure of another delay switch module provided in an embodiment of the present disclosure;

[0024] Figure 8 A schematic structural diagram of another electronic device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0025] In order to more clearly understand the above-mentioned purposes, features and advantages of the embodiments of the present disclosure, the scheme of the embodiments of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features therein can be combined with each other in the absence of conflict.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the embodiments of the present disclosure, but the embodiments of the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, not all of the embodiments.

[0027] like Figure 1 As shown, an embodiment of the present disclosure provides a delayed power-off circuit 10 located in an electronic device 20 . The delayed power-off circuit 10 includes a power management module 11 , a capacitor module 12 , and a delayed switch module 13 . The electronic device 20 also includes a back-end module 21 .

[0028] Specifically, any module in an electronic device that needs to receive power can be the above-mentioned back-end module 21. In a specific embodiment, the back-end module 21 includes a storage module reading interface, which is used to connect to an internal or external storage module of the electronic device and to read data in the storage module. When the electronic device encounters a sudden power outage, the storage module is most likely to suffer damage such as data loss.

[0029] The power management module 11 includes a capacitance monitoring terminal 11A and a delay switch control terminal 11B.

[0030] The capacitor module 12 includes a first end A and a second end B.

[0031] The delay switch module 13 includes a control terminal C, a first terminal A and a second terminal B.

[0032] The capacitance monitoring terminal 11A of the power management module 11 is connected to the first terminal A of the capacitance module, and the delay switch control terminal 11B of the power management module 11 is connected to the control terminal C of the delay switch module 13 .

[0033] The first end A of the capacitor module 12 is also used to connect to the external power supply 30 and receive a power signal provided by the external power supply 30 . The second end B of the capacitor module 12 is grounded, so that the power signal can charge the capacitor module 12 .

[0034] The first end A of the delay switch module 13 is used to connect to the external power supply 30 and receive the power signal provided by the external power supply 30. The first end A of the delay switch module 13 is also connected to the first end A of the capacitor module 12 and is used to receive the capacitor discharge signal provided by the capacitor module 12. The second end B of the delay switch module 13 is connected to the back-end module 21.

[0035] The power management module 11 is configured to provide a first activation signal to the control terminal C of the delay switch module 13 via the delay switch control terminal 11B in response to a voltage received at the capacitor monitoring terminal 11A being greater than a first preset threshold. The delay switch module 13 is configured to provide the power signal or capacitor discharge signal received at the first terminal A to the second terminal B in response to the control terminal C receiving the first activation signal.

[0036] Specifically, when the electronic device is powered on, that is, the external power supply 30 starts to provide a power signal to the electronic device 20, the capacitor module 12 is not fully charged at this time, and the voltage of the first end A of the capacitor module 12 is less than the above-mentioned first preset threshold value. Therefore, the power management module 11 does not provide the first start signal to the delay switch module 13. The delay switch module 13 is in the off state, and the power signal cannot be directly provided to the back-end module 21. Instead, the capacitor module 12 is charged first. When the capacitor module 12 is fully charged, the voltage of the first end A of the capacitor module 12 is greater than the above-mentioned first preset threshold value. The power management module 11 provides the first start signal to the delay switch module 13, and the delay switch module 13 provides the power signal received at the first end A to the second end B, and then to the back-end module 21.

[0037] When the electronic device suddenly loses power (i.e., the external power supply 30 stops providing power to the electronic device 20), the capacitor module 12, acting as a backup power source, begins discharging. The signal received by the first terminal A of the delay switch module 13 changes from a power signal to a capacitor discharge signal. The electronic device will not truly shut down until the capacitor module 12 has completely discharged. During this period of time, the electronic device can execute normal shutdown procedures, such as storing real-time data, thereby improving the security and non-volatility of the data within the electronic device 20 while preventing problems such as file system damage and hardware damage.

[0038] It will be appreciated that the power management module 11 internally includes multiple electronic components, which, through the transmission of electrical signals, execute the process of providing a first activation signal to the control terminal C of the delay switch module 13 via the delay switch control terminal 11B in response to the voltage received by the capacitor monitoring terminal 11A being greater than a first preset threshold. The following embodiments will provide optional hardware chips for the power management module 11; the embodiments of this disclosure do not involve improvements to computer programs.

[0039] Specifically, the mechanism by which the delay switch module 13 provides the signal received at the first terminal A to the second terminal B in response to the signal received at the control terminal C is similar to that of a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) or a BJT (Bipolar Junction Transistor). Those skilled in the art can implement a specific delay switch module 13 based on a MOSFET or BJT. The same applies to the first switch unit M1, the second switch unit M2, the first sub-switch M131, and the second sub-switch M132 described below, and will not be further described.

[0040] In a specific embodiment, Figure 1 As shown, the power management module 11 further includes a power monitoring terminal 11D, which is used to connect to the external power supply 30 and receive a power signal provided by the external power supply 30.

[0041] In some embodiments, as Figure 2 As shown, the delayed power-off circuit 10 further includes a first switch unit M1 , which includes a control electrode G, a first electrode D, and a second electrode S.

[0042] Specifically, when the first switch unit M1 is a MOSFET, the control electrode G is the gate, the first electrode D is the drain, and the second electrode S is the source. In other embodiments, the first electrode D may be the source and the second electrode S may be the drain. The second switch unit M2, the first sub-switch M131, and the second sub-switch M132 described below are similar and will not be described in detail.

[0043] The power management module 11 further includes a first switch control terminal 11C, which is connected to the control electrode G of the first switch unit M1.

[0044] The first electrode D of the first switch unit M1 is used to connect to the external power source 30 and receive a power signal provided by the external power source 30 . The second electrode S of the first switch unit M1 is connected to the first end A of the capacitor module 12 .

[0045] The power management module 11 is further configured to provide a second start signal to the control electrode G of the first switch unit M1 through the first switch control terminal 11C.

[0046] The first switch unit M1 is used to provide the power signal received by the first pole D to the second pole S in response to the control pole G receiving the second start signal, or the first switch unit M1 is used to provide the capacitor discharge signal received by the second pole S to the first pole D in response to the control pole G receiving the second start signal.

[0047] When the electronic device is powered on, that is, the external power supply 30 starts to provide a power signal to the electronic device 20, the power management module 11 provides a second start signal to the control electrode G of the first switch unit M1 through the first switch control terminal 11C, and the first switch unit M1 is turned on, so that the power signal can reach the capacitor module 12 and charge the capacitor module 12.

[0048] When the electronic device suddenly loses power, that is, the external power supply 30 stops providing a power signal to the electronic device 20, the power management module 11 intermittently provides a second start-up signal to the control electrode G of the first switch unit M1 through the first switch control terminal 11C, and then the capacitor module 12 can provide a voltage maintained at a stable value through the first switch unit M1 that is continuously disconnected, and provide a stable power supply to the back-end module 21.

[0049] In a specific embodiment, the first switch unit M1 can maintain the voltage provided by the capacitor module 12 at the same voltage value as the external power supply 30. In a specific implementation, the power management module 11 is further configured to: in response to the power monitoring terminal 11D receiving the power signal provided by the external power supply 30, provide a second start signal to the control electrode G of the first switch unit M1 through the first switch control terminal 11C, so that the first switch unit M1 is turned on, and the power signal can reach the capacitor module 12 and charge the capacitor module 12; at the same time, the power management module 11 is further configured to: in response to the power monitoring terminal 11D not receiving the power signal provided by the external power supply 30, intermittently provide the second start signal to the control electrode G of the first switch unit M1 through the first switch control terminal 11C, so that the capacitor module 12 can provide a voltage maintained at a stable value through the continuously disconnected first switch unit M1, and provide a stable power supply to the back-end module 21.

[0050] In some embodiments, as Figure 3 As shown, the delayed power-off circuit 10 further includes a first inductor L1 , which is connected between the first switch unit M1 and the capacitor module 12 .

[0051] Specifically, the first inductor L1 and the first switch unit M1 together form a boost circuit, and together implement the above embodiment to keep the voltage provided by the capacitor module 12 at the same voltage value as the external power supply 30 .

[0052] In a more specific embodiment, the power monitoring terminal 11D of the power management module 11 is further connected to a pull-up resistor and a pull-down resistor for voltage division, wherein the pull-up resistor is 60.4 kΩ and the pull-down resistor is 9.09 kΩ. The response threshold of the power monitoring terminal 11D is 1.17 V. When the input voltage of the external power supply 30 is 12 V, 12 V> 1.17 V, the power management module 11 provides a second start signal to the control electrode G of the first switch unit M1 through the first switch control terminal 11C, and the first switch unit M1 is turned on, and the 12 V voltage charges the capacitor module 12. When the external power supply 30 is powered off and the voltage value detected by the power monitoring terminal 11D is less than 1.17 V, the boost circuit function is activated, and the capacitor module 12 is boosted to 12 V through the first inductor L1 and the first switch unit M1, and then powers the back-end module 21.

[0053] In some embodiments, as Figure 4 As shown, the delayed power-off circuit 10 further includes a second switch unit M2 , and the second switch unit includes a control electrode G, a first electrode D, and a second electrode S.

[0054] The power management module 11 further includes a second switch control terminal 11E, which is connected to the control electrode G of the second switch unit M2.

[0055] The second pole S of the second switch unit M2 is used to connect to the external power supply 30 and receive the power signal provided by the external power supply 30. The first pole D of the second switch unit M2 is connected to the first end A of the capacitor module 12 and the first end A of the delay switch module 13.

[0056] The power management module 11 is further configured to provide a third start signal to the control electrode G of the second switch unit M2 through the second switch control terminal 11E.

[0057] The second switch unit M2 is configured to provide the power signal received by the second electrode S to the first electrode D in response to the control electrode G receiving the third start signal.

[0058] Specifically, the second switch unit M2 functions as overvoltage protection for the delayed power-off circuit 10. Only when the power management module 11 detects that the power signal is within a safe voltage range will it provide a third turn-on signal to the control electrode G of the second switch unit M2 via the second switch control terminal 11E. If the power management module 11 detects that the power signal exceeds the safe voltage range, it will provide a turn-off signal to the control electrode G of the second switch unit M2 via the second switch control terminal 11E to ensure safe operation of subsequent circuits.

[0059] In some embodiments, as Figure 5 As shown, the capacitor module 12 includes at least two supercapacitors CAP connected in series.

[0060] Supercapacitors are a new type of energy storage device between traditional capacitors and rechargeable batteries, with capacities ranging from several hundred to several thousand farads. Compared to traditional capacitors, they offer greater capacity, specific energy or energy density, a wider operating temperature range, and an extremely long service life. Compared to batteries, supercapacitors also have higher specific power and are environmentally friendly.

[0061] Compared with batteries and traditional physical capacitors, supercapacitors have the following advantages: high power density, reaching 102-104 W / kg, far higher than the power density level of batteries; long cycle life: after 500,000 to 1 million cycles of high-speed deep charge and discharge in a few seconds, the characteristics of supercapacitors change very little, with the capacity and internal resistance decreasing by only 10% to 20%; wide operating temperature range: because the adsorption and desorption rates of ions in supercapacitors do not change much at low temperatures, their capacity changes much less than that of batteries. Commercial supercapacitors have an operating temperature range of -40°C to +80°C; maintenance-free: supercapacitors have high charge and discharge efficiency, a certain tolerance to overcharge and over-discharge, and can be stably charged and discharged repeatedly; green and environmentally friendly: supercapacitors do not use heavy metals or other harmful chemicals in the production process, and they have a long lifespan, making them a new type of green and environmentally friendly power source.

[0062] Specifically, the duration of the power-on or power-off delay of the circuit can be controlled by controlling the capacity of the supercapacitor.

[0063] In a specific embodiment, Figure 5 As shown, the capacitor module 12 includes four super capacitors CAP connected in series. In other embodiments, the capacitor module 12 may include other numbers of super capacitors CAP connected in series, all of which are within the scope of protection of the present disclosure.

[0064] In some embodiments, the nominal capacity of the supercapacitor CAP is greater than or equal to 50F.

[0065] In a specific embodiment, the supercapacitor CAP can adopt the high-capacity supercapacitor BCS2R7M606YS1840 from Emerald. The rated voltage of this supercapacitor is 2.7V and the nominal capacity is 60F, which can meet the power supply and delay requirements of general electronic equipment.

[0066] In some embodiments, as Figure 6 As shown, the delay switch module 13 includes a first sub-switch M131 and a second sub-switch M132 . The first sub-switch M131 and the second sub-switch M132 each include a control electrode G, a first electrode D, and a second electrode S.

[0067] The control electrode G of the first sub-switch M131 serves as the control terminal C of the delay switch module 13 and receives the above-mentioned first start signal. The second electrode S of the first sub-switch M131 is grounded, and the first electrode D of the first sub-switch M131 is connected to the control electrode G of the second sub-switch M132.

[0068] The first pole D of the second sub-switch M132 serves as the second end B of the delay switch module 13 , and the second pole S of the second sub-switch M132 serves as the first end A of the delay switch module 13 .

[0069] In response to the control electrode G receiving the first turn-on signal, the first sub-switch M131 conducts between the first electrode G and the second electrode S, thereby lowering the potential of the control electrode G of the second sub-switch M132, thereby conducting between the first electrode G and the second electrode S of the second sub-switch M132.

[0070] Specifically, the first sub-switch M131 and the second sub-switch M132 function as two-stage switches to jointly control the output of the power supply signal. As a primary control switch, the first sub-switch M131 can quickly respond and precisely control the on and off state of the second sub-switch M132 (i.e., the secondary control switch), thereby achieving precise management of circuit power consumption and reducing unnecessary power consumption. Furthermore, due to the high-frequency characteristics of MOSFETs, the rapid control of the secondary control switch by the primary control switch can improve the response speed of the entire circuit. Furthermore, when the delay switch module 13 is in forward conduction, applying an appropriate voltage to the control electrode G of the first sub-switch M131 can cause it to saturate and conduct, thereby generating almost no voltage drop when current passes through it. Furthermore, under the precise control of the first sub-switch M131, the second sub-switch M132 can also achieve low-voltage-drop conduction when needed, thereby improving the efficiency of the entire circuit.

[0071] When implementing it specifically, Figure 7 As shown, the delay switch module 13 further includes a first resistor R1 , a second resistor R2 , a third resistor R3 , a first capacitor C1 , a second capacitor C2 , a first diode D1 , and a second diode D2 .

[0072] Specifically, the second resistor R2 and the third resistor R3 are voltage divider resistors of the control electrode G of the second sub-switch M132. When the first sub-switch M131 is turned on, the second resistor R2 and the third resistor R3 ensure that the voltage of the control electrode G of the second sub-switch M132 is pulled down.

[0073] If the control electrode G of the first sub-switch M131 does not receive a clear level signal, it may be left floating, susceptible to external noise or interference, causing malfunction or instability of the first sub-switch M131. Connecting a first resistor R1 (specifically, 200 kΩ) to ground at the control electrode G provides a defined level for the control electrode G, thus preventing problems caused by a floating control electrode G.

[0074] The first capacitor C1 is used for filtering, and the second capacitor C2 and the third resistor R3 form an RC circuit that can eliminate switching noise, prevent oscillation, achieve soft start, and filter signals. Specifically, during the MOSFET switching process, switching noise may be generated due to the presence of parasitic capacitance and inductance. The RC circuit can use the charge and discharge characteristics of the capacitor to absorb this noise, thereby reducing the impact of noise on the circuit; the switching action of the MOSFET may cause oscillation in the circuit. The RC circuit can provide a damping effect, helping to suppress the oscillation phenomenon and make the circuit more stable; when the MOSFET starts, the RC circuit can provide a slow control electrode voltage rise process, achieving the MOSFET soft start and avoiding current shock and damage caused by sudden changes in the control electrode voltage; the RC circuit itself has a filtering effect, which can filter out high-frequency noise and interference signals. By adding an RC circuit before the MOSFET, the input power signal can be preprocessed to improve the purity and quality of the signal.

[0075] The first diode D1 and the second diode D2 are used to prevent the voltage of the power signal from flowing back. The SYS terminal connected to the second diode D2 receives the supply voltage provided by the power management module 11. When the power management module 11 provides the supply voltage, it means that the power management module 11 is ready to start powering other devices.

[0076] When either the delay switch control terminal 11B or the SYS terminal receives an on signal, the delay switch module 13 is turned on, and as long as the external power supply 30 receives a power signal, the electronic device 20 can be powered. When the external power supply 30 is powered off, both the delay switch control terminal 11B and the SYS terminal must receive an off signal to stop the power supply, thereby depleting the energy stored in the capacitor module 12 and providing more flexible circuit control. In other embodiments, the circuit's power supply logic can be modified by removing the first diode D1 or the second diode D2.

[0077] In some embodiments, the power management module 11 is an LTC3350 chip.

[0078] Specifically, the capacitor monitoring terminal 11A of the above-mentioned power management module 11 can be the CAPFB pin of the LTC3350 chip, the delay switch control terminal 11B can be the CAPGB pin of the LTC3350 chip, the first switch control terminal 11C can be the TGATE pin of the LTC3350 chip, the power monitoring terminal 11D can be the PFI of the LTC3350 chip, and the second switch control terminal 11E can be the INFET pin of the LTC3350 chip.

[0079] Based on the same utility model concept, corresponding to any of the above embodiments and methods, such as Figure 1As shown, the present application further provides an electronic device 20 , comprising any one of the delayed power-off circuits 10 in the above embodiments and a back-end module 21 .

[0080] The electronic device provided by the embodiment of the present disclosure is equipped with a delayed power-off circuit, which can achieve delayed startup and delayed shutdown of power on and off, thereby improving the security and non-volatility of data inside the electronic device, while avoiding problems such as file system damage and hardware damage.

[0081] In some embodiments, the back-end module 21 includes a storage module reading interface, which is used to connect to a storage module inside or outside the electronic device and to read data in the storage module. When the electronic device encounters a sudden power outage, the storage module is most likely to suffer damage such as data loss.

[0082] Specifically, the storage module reading interface may be a SATA (Serial Advanced Technology Attachment, Serial ATA) interface, which is used to install a SATA hard disk and read data from the SATA hard disk. Specifically, the SATA interface is compatible with the SATA 3.0 protocol.

[0083] SATA hard drives, also known as serial hard drives, utilize a serial connection. The Serial ATA bus uses an embedded clock signal and possesses strong error-correction capabilities. This allows the bus to check transmission instructions and automatically correct any errors, improving data transmission reliability. SATA hard drives and SATA interfaces also offer a simple structure and hot-swappable support.

[0084] In some embodiments, the back-end module 21 further includes a DC-DC converter, which is used to convert the power signal provided by the delayed power-off circuit 10 into a power signal suitable for other back-end units.

[0085] In a specific embodiment, the electronic device 20 provided by the embodiment of the present disclosure is as follows: Figure 8 As shown, it includes a test chassis 22, a power adapter 23, a SATA interface 24, a power interface 25 (for connecting an external power supply 30), a gigabit network interface 26, a reset button 27, a power indicator light 281, a gigabit network indicator light 282, a main control module 29 and the above-mentioned delayed power-off circuit 10.

[0086] The test chassis 22 has a size of 182*193*170mm, a metal structure, and a black paint surface.

[0087] The power adapter 23 is used to convert the 220V AC power provided by the external power supply 30 into the power signal (specifically 12V) required by the above-mentioned delayed power-off circuit 10.

[0088] The reset button 27 is used to restore the abnormal state of the electronic device. When there is a problem with the startup of the electronic device or when it needs to be restarted without powering on during use, the main control module 29 and the power management module 11 in the delayed power-off circuit 10 can press the reset button 27 to achieve the power-on reset of the main control module 29 and the system restart.

[0089] The power indicator light 281 and the Gigabit Ethernet indicator light 282 are used to read the working status and information transmission status of the electronic device.

[0090] The Gigabit network interface 26 is used for data transmission.

[0091] The main control module 29 is provided with a CPU (Central Processing Unit), an MCU (Microcontroller Unit), etc., which are used for controlling the workflow of the electronic equipment, basic input and output signal processing, display and key control, external communication interface control, etc.

[0092] For the convenience of description, the above devices are described as being divided into various modules according to their functions. Of course, when implementing this application, the functions of each module can be implemented in the same or multiple software and / or hardware.

[0093] The electronic device of the above embodiment includes a corresponding delayed power-off circuit for implementing any of the above embodiments, and has the beneficial effects of the corresponding embodiment, which will not be described in detail here.

[0094] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises a..." do not exclude the presence of other identical elements in the process, method, article or device that includes the above elements.

[0095] The foregoing are merely specific embodiments of the present disclosure, intended to enable those skilled in the art to understand and implement the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is not limited to the foregoing embodiments, but is intended to be construed in the broadest manner consistent with the principles and novel features disclosed herein.

Claims

1. A delayed power-off circuit, characterized in that: Located in an electronic device, the delayed power-off circuit includes a power management module, a capacitor module, and a delayed switch module. The electronic device also includes a back-end module, wherein: The power management module includes a capacitor monitoring terminal and a delay switch control terminal; The capacitor module includes a first end and a second end; The delay switch module includes a control end, a first end and a second end; The capacitance monitoring terminal of the power management module is connected to the first terminal of the capacitance module, and the delay switch control terminal of the power management module is connected to the control terminal of the delay switch module; The first end of the capacitor module is further used to connect to an external power supply and receive a power signal provided by the external power supply, and the second end of the capacitor module is grounded; The first end of the delay switch module is used to be connected to the external power supply and receive the power signal provided by the external power supply. The first end of the delay switch module is also connected to the first end of the capacitor module and is used to receive the capacitor discharge signal provided by the capacitor module. The second end of the delay switch module is connected to the back-end module. The power management module is configured to provide a first start signal to the control terminal of the delay switch module via the delay switch control terminal in response to the voltage received by the capacitor monitoring terminal being greater than a first preset threshold; The delay switch module is configured to provide the power signal or the capacitor discharge signal received by the first end to the second end in response to the control end receiving the first start signal.

2. The delayed power-off circuit according to claim 1, characterized in that: It also includes a first switch unit, wherein the first switch unit includes a control electrode, a first electrode and a second electrode; The power management module further includes a first switch control terminal connected to the control electrode of the first switch unit; The first electrode of the first switch unit is used to connect to the external power supply and receive the power signal provided by the external power supply, and the second electrode of the first switch unit is connected to the first end of the capacitor module; The power management module is further configured to provide a second start signal to the control electrode of the first switch unit via the first switch control terminal; The first switching unit is used to provide the power supply signal received by the first pole to the second pole in response to the control pole receiving the second start signal, or the first switching unit is used to provide the capacitor discharge signal received by the second pole to the first pole in response to the control pole receiving the second start signal.

3. The delayed power-off circuit according to claim 2, characterized in that: It also includes a first inductor connected between the first switch unit and the capacitor module.

4. The delayed power-off circuit according to claim 1, characterized in that: Also included is a second switch unit, the second switch unit including a control electrode, a first electrode and a second electrode; The power management module further includes a second switch control terminal connected to the control electrode of the second switch unit; The second pole of the second switch unit is used to be connected to the external power supply and receive the power signal provided by the external power supply, and the first pole of the second switch unit is connected to the first end of the capacitor module and the first end of the delay switch module; The power management module is further configured to provide a third start signal to the control electrode of the second switch unit via the second switch control terminal; The second switch unit is configured to provide the power signal received by the second electrode to the first electrode in response to the control electrode receiving the third start signal.

5. The delayed power-off circuit according to claim 1, characterized in that: The capacitor module includes at least two supercapacitors connected in series.

6. The delayed power-off circuit according to claim 5, characterized in that: The nominal capacity of the supercapacitor is greater than or equal to 50F.

7. The delayed power-off circuit according to claim 1, characterized in that: The delay switch module includes a first sub-switch and a second sub-switch, and the first sub-switch and the second sub-switch each include a control electrode, a first electrode, and a second electrode; The control electrode of the first sub-switch serves as the control terminal of the delay switch module, the second electrode of the first sub-switch is grounded, and the first electrode of the first sub-switch is connected to the control electrode of the second sub-switch; The first pole of the second sub-switch serves as the second end of the delay switch module, and the second pole of the second sub-switch serves as the first end of the delay switch module.

8. The delayed power-off circuit according to claim 1, characterized in that: The power management module is an LTC3350 chip.

9. An electronic device, characterized in that: It comprises the delayed power-off circuit and the back-end module according to any one of claims 1 to 8.

10. The electronic device according to claim 9, characterized in that The backend module includes a storage module reading interface.

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