Gateway power supply circuit, circuit board and edge gateway equipment

Abstract

The invention provides a gateway power supply circuit, a circuit board and edge gateway equipment, relates to the technical field of electronic circuits, and solves the problem of poor stability of the edge gateway equipment in the related art. The gateway power supply circuit realizes real-time monitoring of a main power supply voltage, and once it is detected that the main power supply voltage exceeds a preset safety range, the edge gateway equipment can be switched off. When the power supply fails, the system immediately triggers a power supply switching mechanism and seamlessly switches to the auxiliary power supply to supply power, so that the downtime of equipment caused by power supply failure is greatly shortened, and the continuity and the stability of the system are ensured. And when the power supply is suddenly interrupted, the power supply of a key circuit can be quickly cut off, and the power supply can be used as a back-up power supply to quickly provide electric energy support through a high-performance super capacitor, so that key data is not lost, and the data safety and integrity of the system are effectively protected.

Description

Technical Field

[0001] The present application relates to the field of electronic circuit technology, and in particular to a gateway power supply circuit, a circuit board and an edge gateway device. Background Art

[0002] In the current edge gateway design, the stability and reliability of the power supply system are key factors to ensure the continuous and stable operation of the equipment. In related technologies, edge gateway devices are powered by a single power supply, which is particularly vulnerable to emergencies such as power failures, voltage fluctuations, or instantaneous power outages. Once the main power supply fails, the system will often shut down immediately, resulting in the loss of data being processed and service interruption, which seriously affects the stability of the system and the normal use of users.

[0003] In the face of power failure, a corresponding backup power supply or auxiliary power supply is usually provided as the power supply to switch to after the main power supply fails, but the related technology lacks a power management solution, that is, when the main power supply returns to normal, the system may not be able to switch back to the main power supply mode in time and automatically, which not only affects the overall operating efficiency of the system, but may also cause performance degradation due to the long-term non-use of the main power supply, reducing the long-term stability and life of the system. In this regard, the stability of the edge gateway device in the related technology is difficult to guarantee. Summary of the invention

[0004] The present application provides a gateway power supply circuit, a circuit board and an edge gateway device, which solves the problem of poor stability of the edge gateway device in the related art. The present application can quickly and smoothly transition to the secondary power supply state when the main power supply fails, and perform power-off protection when the power fails, thereby improving the stability of the edge gateway device.

[0005] In a first aspect, the present application provides a gateway power supply circuit, which is used to access a main power supply and a secondary power supply, and the gateway power supply circuit includes a main power supply access module, a power supply switching module, a power failure protection module and a power supply output module;

[0006] The input end of the main power access module is used to access the main power supply, and the main power access module is used to reduce the voltage of the main power supply;

[0007] The first input end of the power switching module is connected to the output end of the main power access module, the second input end of the power switching module is used to access the auxiliary power supply, and the power switching module is used to output a power supply voltage when the main power supply and / or the auxiliary power supply are connected;

[0008] The power-off protection module includes a power-off detection unit, a logic control unit and a capacitor power supply unit. The detection end of the power-off detection unit is connected to the output end of the power switching module, the output end of the power-off detection unit is connected to the signal access end of the logic control unit, the control output end of the logic control unit is connected to the power supply control end of the capacitor power supply unit, and the power supply access end of the capacitor power supply unit is also connected to the output end of the power switching module. The power-off detection unit is used to detect the power supply voltage output by the power switching module for the logic control unit and determine whether the power is off. The logic control unit is used to output a control signal to control the capacitor power supply unit to start power supply when the power is off. The capacitor power supply unit is used to start power supply when receiving the control signal, and use the power supply voltage to charge when the power supply is not turned on;

[0009] The first input end of the power output module is connected to the output end of the power switching module, the second input end of the power output module is connected to the power supply output end of the capacitor power supply unit, and the power output module is used to perform voltage conversion so that the circuit output adapts to the load voltage.

[0010] In a second aspect, the present application also provides a circuit board, which includes the above-mentioned gateway power supply circuit.

[0011] In a third aspect, the present application also provides an edge gateway device, which includes the above-mentioned circuit board.

[0012] The gateway power circuit of the present application realizes real-time monitoring of the main power voltage. Once the main power voltage is detected to be beyond the preset safety range, the system will immediately trigger the power switching mechanism and seamlessly switch to the auxiliary power supply, thereby greatly shortening the equipment downtime caused by power failure and ensuring the continuity and stability of the system. It can also quickly cut off the power supply of key circuits when the power is suddenly interrupted, and quickly provide power support through high-performance supercapacitors as a backup power supply, thereby ensuring that key data is not lost and effectively protecting the data security and integrity of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of the structure of a gateway power supply circuit provided in an embodiment of the present application;

[0014] Figure 2 A schematic diagram of the circuit structure of a power switching module provided in one embodiment of the present application;

[0015] Figure 3 A schematic diagram of the circuit structure of a power failure detection unit provided in an embodiment of the present application;

[0016] Figure 4 A schematic diagram of the circuit structure of a logic control unit provided in one embodiment of the present application;

[0017] Figure 5A schematic diagram of the circuit structure of a capacitor subunit provided in an embodiment of the present application;

[0018] Figure 6 A schematic diagram of the circuit structure of a boost subunit provided in one embodiment of the present application;

[0019] Figure 7 A schematic diagram of the circuit structure of a voltage conversion submodule provided in an embodiment of the present application;

[0020] Figure 8 A schematic diagram of the circuit structure of a main power access module provided in one embodiment of the present application. DETAILED DESCRIPTION

[0021] The embodiments of the present application are further described in detail below in conjunction with the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are only used to explain the embodiments of the present application, rather than to limit the embodiments of the present application. It should also be noted that, for ease of description, only the parts related to the embodiments of the present application rather than all structures are shown in the accompanying drawings, and those skilled in the art should be able to think of it after reading the specification of this application that as long as the technical features do not contradict each other, any combination of the technical features can constitute an optional implementation method.

[0022] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable when appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally a class, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally represents that the objects associated before and after are in an "or" relationship. In the description of the present application, "multiple" means two or more, and "several" means one or more.

[0023] In the current edge gateway design, the stability and reliability of the power supply system are key factors to ensure the continuous and stable operation of the equipment. However, the existing power supply design often has the following major problems: insufficient power supply stability, lack of automatic switching mechanism, and limited voltage adaptability. Despite the above defects, some existing technologies have tried to improve the stability and reliability of the power supply in different ways. For example, some solutions adopt a dual power backup design, that is, adding a backup power supply in addition to the main power supply. However, these solutions often do not implement a true automatic switching mechanism, or the switching speed is slow, and the power supply cannot be quickly restored at a critical moment. In addition, there are some solutions that improve the voltage conversion efficiency and stability of the power supply by optimizing the power conversion circuit. However, these solutions can usually only improve the power supply performance to a certain extent, and cannot fundamentally solve the problems of insufficient power supply stability and lack of automatic switching mechanism.

[0024] In this regard, the present application provides a gateway power supply circuit, which can be applied to edge gateway devices to solve the problem of poor stability of edge gateway devices. It can be imagined that the edge gateway device is connected to a main power supply and a secondary power supply. In this regard, the gateway power supply circuit is used to access the main power supply and the secondary power supply, and then by integrating high-precision real-time monitoring technology and intelligent switching logic, the gateway power supply circuit of the present application can track the working status of the main power supply in real time. Once an abnormality or fault signal is detected in the main power supply, the system will immediately start the automatic switching mechanism and seamlessly transition to the secondary power supply mode or other power supply methods, thereby ensuring the continuity and stability of the system power supply and avoiding data loss and service interruption.

[0025] Figure 1 A schematic diagram of the structure of a gateway power circuit provided in an embodiment of the present application, wherein the gateway power circuit includes a main power access module 110, a power switching module 120, a power failure protection module 130 and a power output module 140. The input end of the main power access module 110 is used to access the main power supply to reduce the voltage of the main power supply; and the output end of the main power access module 110 is connected to the first input end of the power switching module 120, and the second input end of the power switching module 120 is used to access the auxiliary power supply. The power switching module 120 is used to output a power supply voltage when the main power supply and / or the auxiliary power supply are connected. It can be imagined that although the power switching module 120 can access two voltages provided by the main power supply and the auxiliary power supply, the power switching module 120 only provides a voltage signal for the subsequent circuit, that is, it can switch to the auxiliary power supply when the main power supply is abnormal, thereby powering the edge gateway device.

[0026] In addition, the power-off protection module 130 includes a power-off detection unit 131, a logic control unit 132 and a capacitor power supply unit 133. The detection end of the power-off detection unit 131 is connected to the output end of the power switching module 120, the output end of the power-off detection unit 131 is connected to the signal access end of the logic control unit 132, the control output end of the logic control unit 132 is connected to the power supply control end of the capacitor power supply unit 133, and the power supply access end of the capacitor power supply unit 133 is also connected to the output end of the power switching module 120. The power-off detection unit 131 is used to detect the power supply voltage output by the power switching module 120 for the logic control unit 132 and determine whether the power is off, thereby outputting a corresponding electrical signal to the logic control unit 132 when the power is off, and the logic control unit 132 is used to output a control signal to control the capacitor power supply unit 133 to start power supply when the power is off. The capacitor power supply unit 133 is used to start power supply when receiving the control signal, and use the power supply voltage for charging when the power supply is not turned on. It can be understood that the power-off protection module 130 detects the power supply voltage output by the power switching module 120 through the power-off detection unit 131 thereon, that is, collects the power supply voltage output by the power switching module 120, thereby providing the logic control unit 132 with an electrical signal for detecting whether the main power supply and the auxiliary power supply are powered off. Then, when it is determined that a power off occurs, the logic control unit 132 controls the capacitor power supply module to discharge, so as to supply power to the subsequent circuit.

[0027] The first input end of the power output module 140 is connected to the output end of the power switching module 120, and the second input end of the power output module 140 is connected to the power supply output end of the capacitor power supply unit 133. The power output module 140 is used to perform voltage conversion so that the circuit outputs a voltage that adapts to the load. It can be imagined that when the main power supply or the auxiliary power supply is used, the power output module 140 is connected to the power supply voltage output by the power switching module 120 and supplies power to the device; and when the main power supply or the auxiliary power supply is powered off and the capacitor is used for power supply, the power output module 140 is connected to the voltage output by the capacitor power supply unit 133 and supplies power to the device.

[0028] Therefore, the gateway power circuit of the present application realizes real-time monitoring of the main power voltage. Once the main power voltage is detected to be beyond the preset safety range, the system will immediately trigger the power switching mechanism and seamlessly switch to the auxiliary power supply, thereby greatly shortening the equipment downtime caused by power failure and ensuring the continuity and stability of the system. It can also quickly cut off the power supply of key circuits when the power is suddenly interrupted, and quickly provide power support through high-performance super capacitors as a backup power supply, thereby ensuring that key data is not lost and effectively protecting the data security and integrity of the system.

[0029] Figure 2A circuit structure diagram of a power switching module provided for an embodiment of the present application, wherein the power switching module includes a first PMOS tube Q1, a second PMOS tube Q2, a first voltage-dividing resistor R1, a second voltage-dividing resistor R2, a third voltage-dividing resistor R3, a fourth voltage-dividing resistor R4, a fifth voltage-dividing resistor R5, a sixth voltage-dividing resistor R6, a first diode D1, a first NPN transistor Q3 and an electrostatic discharge diode D2.

[0030] Specifically, the drain end of the first PMOS tube Q1 serves as the first input end of the power switching module, the drain end of the first PMOS tube Q1 is connected to the first end of the first voltage-dividing resistor R1, the second end of the first voltage-dividing resistor R1 is connected to the first end of the second voltage-dividing resistor R2, and the second end of the second voltage-dividing resistor R2 is grounded.

[0031] The source end of the first PMOS tube Q1 serves as the output end of the power switching module. The source end of the first PMOS tube Q1 is connected to the first end of the third voltage-dividing resistor R3. The second end of the third voltage-dividing resistor R3 is connected to the first end of the fourth voltage-dividing resistor R4. The first end of the fourth voltage-dividing resistor R4 is also connected to the gate end of the first PMOS tube Q1.

[0032] The collector terminal of the first NPN transistor Q3 is connected to the second end of the fourth voltage-dividing resistor R4, the base terminal of the first NPN transistor Q3 is connected to the input voltage through the fifth voltage-dividing resistor R5, the base terminal of the first NPN transistor Q3 is also connected to the emitter terminal of the first NPN transistor Q3 through the sixth voltage-dividing resistor R6, and the emitter terminal of the first NPN transistor Q3 is also grounded.

[0033] The drain end of the second PMOS tube Q2 serves as the second input end of the power switching module, the drain end of the second PMOS tube Q2 is also connected to the grounded electrostatic discharge diode D2, the gate end of the second PMOS tube Q2 is connected to the first end of the second voltage-dividing resistor R2, the source end of the second PMOS tube Q2 is connected to the anode end of the first diode D1, and the cathode end of the first diode D1 is connected to the source end of the first PMOS tube Q1.

[0034] It can be understood that, when the main power supply is normal, the drain terminal of the first PMOS tube Q1 is connected to the main power supply, and since the parasitic diode on the first PMOS tube Q1 is turned on, a voltage drop is generated at the source terminal of the first PMOS tube Q1. Moreover, the base terminal of the first NPN transistor Q3 is connected to the input voltage through the fifth voltage-dividing resistor R5, and the base terminal of the first NPN transistor Q3 is also connected to the emitter terminal of the first NPN transistor Q3 through the sixth voltage-dividing resistor R6. Therefore, under the voltage-dividing effect of the fifth voltage-dividing resistor R5 and the sixth voltage-dividing resistor R6, the first NPN transistor Q3 is turned on, so that the third voltage-dividing resistor R3 and the fourth voltage-dividing resistor R4 divide the voltage, the gate terminal voltage of the first PMOS tube Q1 increases, and the first PMOS tube Q1 is turned on, so that the power switching module can provide the power supply voltage corresponding to the main power supply to the subsequent circuit.

[0035] When the auxiliary power supply is normally supplied, the electrostatic discharge diode D2 can protect the auxiliary power supply from electrostatic discharge damage. The drain end of the second PMOS tube Q2 is connected to the auxiliary power supply. Since the parasitic diode on the second PMOS tube Q2 is turned on, a voltage drop is generated at the source end of the second PMOS tube Q2, which is then transmitted to the output end of the power switching module through the first diode D1.

[0036] It can be imagined that even when the main power supply and the auxiliary power supply are powered normally at the same time, the power switching module still provides a voltage signal output. For the second input end of the power switching module connected to the auxiliary power supply, that is, the drain end of the second PMOS tube Q2, under the voltage division effect of the first voltage-dividing resistor R1 and the second voltage-dividing resistor R2, the gate end of the second PMOS tube Q2 can be connected to the corresponding voltage. Moreover, since the parasitic diode on the second PMOS tube Q2 is turned on, a voltage drop is generated at the source end of the second PMOS tube Q2, thereby turning on the second PMOS tube Q2 and transmitting it to the output end of the power switching module through the first diode D1. However, since a voltage drop is formed on the first diode D1, the voltage provided by the auxiliary power supply will be slightly lower than the voltage provided by the main power supply. In this regard, when the main power supply and the auxiliary power supply are powered normally at the same time, the power switching module can provide the voltage provided by the main power supply.

[0037] The parasitic diode on the first PMOS tube Q1 can prevent the voltage provided by the auxiliary power supply from flowing back to the main power supply, and the parasitic diode on the first diode D1 and the second PMOS tube Q2 can prevent the voltage provided by the main power supply from flowing back to the auxiliary power supply.

[0038] In this regard, the power switching module can power the subsequent circuits when the main power supply is normal, and transition to using the secondary power supply to power the subsequent circuits after the main power supply fails, realizing automatic power switching, thereby ensuring the continuity and stability of the system power supply of the edge gateway device, helping to avoid data loss and service interruption.

[0039] Figure 3 The circuit structure diagram of the power failure detection unit provided in one embodiment of the present application is used to detect the power supply voltage output by the power switching module to provide a corresponding detection signal to the logic control unit for judging whether the power is off. It can be imagined that the power failure detection unit can compare the connected power supply voltage with the corresponding voltage threshold, and then output a corresponding electrical signal to indicate whether there is a power failure, for example, providing a high-level electrical signal when there is a power failure, and providing a low-level electrical signal when there is no power failure.

[0040] like Figure 3 As shown, in one embodiment, the power-off detection unit includes an operational amplifier A1, a seventh voltage-dividing resistor R7, an eighth voltage-dividing resistor R8, a ninth voltage-dividing resistor R9, and a tenth voltage-dividing resistor R 10 , feedback resistor R f and the first pull-up resistor R pu1 .

[0041] The in-phase input terminal of the operational amplifier A1 is connected to the first end of the seventh voltage-dividing resistor R7, the first end of the seventh voltage-dividing resistor R7 is also connected to the grounded eighth voltage-dividing resistor R8, the second end of the seventh voltage-dividing resistor R7 is connected to the power supply voltage output by the power switching module, and the in-phase input terminal of the operational amplifier A1 is also connected to the grounded eighth voltage-dividing resistor R8 through the feedback resistor R f The inverting input terminal of the operational amplifier A1 is connected to the first end of the ninth voltage-dividing resistor R9, and the first end of the ninth voltage-dividing resistor R9 is also connected to the grounded tenth voltage-dividing resistor R 10 , the second end of the ninth voltage-dividing resistor R9 is connected to the supply voltage; the output end of the operational amplifier A1 is also connected to the first pull-up resistor R pu1 Connect the supply voltage.

[0042] It can be understood that the ninth voltage-dividing resistor R9 and the tenth voltage-dividing resistor R 10 A corresponding input voltage can be provided to the inverting input terminal of the operational amplifier A1, that is, as a voltage threshold. At the non-inverting input terminal of the operational amplifier A1, the power supply voltage output by the power switching module is connected as the input voltage. In this regard, the operational amplifier A1 can determine whether there is a power failure by comparing the input voltages connected to the two input terminals, that is, comparing the power supply voltage output by the power switching module and the voltage threshold. Of course, when there is a power failure and when there is no power failure, the operational amplifier A1 can provide different electrical signals respectively to be transmitted to the logic control unit at the next level, thereby realizing the power failure detection function.

[0043] Figure 4A circuit structure diagram of a logic control unit provided in an embodiment of the present application, wherein the logic control unit is used to output a control signal to control the capacitor power supply unit to start power supply when power is off, that is, when the logic control unit determines that the currently connected power supply has a power off, the logic control unit will control the capacitor power supply unit to start, thereby providing a power off protection function for the device through capacitor discharge, thereby providing a short but sufficient power guarantee for key circuits, so that the system can complete the storage of important data, status recording and orderly shutdown operations, effectively preventing data loss and system damage, and improving the data security and system stability of the device.

[0044] like Figure 4 As shown, in one embodiment, the logic control unit includes a microcontroller U1, a second NPN transistor Q3, a first current limiting resistor R c1 , the eleventh voltage-dividing resistor R 11 , the twelfth voltage-dividing resistor R 12 , a first filter capacitor C1, a second filter capacitor C2, a third filter capacitor C3 and a third PMOS tube Q4.

[0045] The microcontroller U1 is MCU (Microcontroller Unit), the first GPIO pin of the microcontroller U1 is used as the signal access terminal of the logic control unit, and the second GPIO pin of the microcontroller U1 is connected to the first current limiting resistor R c1 The first end of the first current limiting resistor R c1 The second end of is connected to the base end of the second NPN transistor Q3, and the second GPIO pin of the microcontroller U1 outputs an enable signal when power is off.

[0046] The collector terminal of the second NPN transistor Q3 is grounded, and the gate terminal of the second NPN transistor Q3 is connected to the ground through the eleventh voltage-dividing resistor R 11 The collector terminal of the second NPN transistor Q3 is connected, and the first filter capacitor C1 is connected in parallel to the eleventh voltage-dividing resistor R 11 The emitter terminal of the second NPN transistor Q3 is connected to the drain terminal of the third PMOS transistor Q4, and the emitter terminal of the second NPN transistor Q3 is also connected to the drain terminal of the third PMOS transistor Q4 through the twelfth voltage-dividing resistor R 12 The source terminal of the third PMOS tube Q4 is connected, and the second filter capacitor C2 is connected in parallel to the twelfth voltage-dividing resistor R 12 The drain terminal and the source terminal of the third PMOS tube Q4 are respectively used as control output terminals of the logic control unit, and the drain terminal of the third PMOS tube Q4 is also connected to the grounded third filter capacitor C3.

[0047] It can be understood that the microcontroller U1 outputs a corresponding enable signal so that the base terminal of the second NPN transistor Q3 can be connected to the corresponding voltage. The source terminal of the third PMOS tube Q4 is connected to the capacitor power supply unit. It can be imagined that the power supply voltage is used for charging when the power supply is not turned on, that is, the capacitor power supply unit can charge the capacitor by connecting to the output terminal of the power switching module, and turn on the power supply when the power is off. In this regard, the source terminal of the third PMOS tube Q4 can be connected to the voltage provided by the capacitor when there is a power failure, and the twelfth voltage-dividing resistor R 12 Under the divided voltage, the second NPN transistor Q3 meets the conduction condition, and then the second NPN transistor Q3 is turned on, and the third PMOS transistor Q4 is also turned on, so that the capacitor power supply unit can supply power to the subsequent circuit.

[0048] The power supply access end of the capacitor power supply unit is connected to the output end of the power switching module, and then charged with the power supply voltage when the power supply is not turned on. In one embodiment, the capacitor power supply unit includes a capacitor subunit and a boost subunit, wherein the power supply end of the capacitor subunit is connected to the output end of the power switching module, so as to charge the capacitor of the capacitor subunit through the power supply voltage output by the power switching module, and the output end of the capacitor subunit is connected to the control output end of the logic control unit, and the input end of the boost subunit is also connected to the control output end of the logic control unit, and the input end of the boost subunit serves as the power supply control end of the capacitor power supply unit, and the output end of the boost subunit is connected to the second input end of the power output module. It can be imagined that the boost subunit is connected to the capacitor subunit when the logic control unit outputs a control signal to boost the voltage provided by the capacitor subunit.

[0049] Figure 5 A schematic diagram of the circuit structure of a capacitor subunit provided in an embodiment of the present application is shown in FIG. Figure 5 As shown, in one embodiment, the capacitor subunit includes a thirteenth voltage-dividing resistor R 13 , the fourteenth voltage-dividing resistor R 14 , the fifteenth voltage-dividing resistor R 15 , the sixteenth voltage-dividing resistor R 16 , the seventeenth voltage-dividing resistor R 17 , first PNP transistor Q5, second PNP transistor Q6, second diode D3, Schottky diode D4, super capacitor C s1 And Zener diode U2.

[0050] Specifically, the emitter end of the first PNP transistor Q5 is connected to the output end of the power switching module, and the emitter end of the first PNP transistor Q5 is connected to the output end of the power switching module through the 13th voltage-converting resistor R 13The base terminal of the first PNP transistor Q5 is connected, and the base terminal of the first PNP transistor Q5 is also connected to the emitter terminal of the second PNP transistor Q6, and the collector terminal of the first PNP transistor Q5 is connected to the base terminal of the second PNP transistor Q6.

[0051] The base terminal of the second PNP transistor Q6 is connected to the grounded fourteenth voltage-dividing resistor R 14 The collector end of the second PNP transistor Q6 is connected to the anode end of the Schottky diode D4, and the cathode end of the Schottky diode D4 is connected to the super capacitor C s1 The positive terminal of the supercapacitor C s1 The negative terminal of the second diode D3 is grounded. In addition, the second diode D3 is connected in parallel with the Schottky diode D4, that is, the anode terminal of the second diode D3 is connected to the anode terminal of the Schottky diode D4, and the cathode terminal of the second diode D3 is connected to the cathode terminal of the Schottky diode D4.

[0052] In addition, the fifteenth voltage-dividing resistor R 15 The first end is connected to the super capacitor C s1 The positive terminal of the fifteenth voltage dividing resistor R 15 The second end is connected to the input end of the voltage regulator U2, and the fifteenth voltage dividing resistor R 15 The first end is also connected to the sixteenth voltage dividing resistor R 16 The first end of the sixteenth voltage-dividing resistor R 16 The second end is connected to the seventeenth voltage dividing resistor R 17 The first end of the seventeenth voltage-dividing resistor R 17 The second end of is connected to the output end of the voltage regulator tube U2, and the ground end of the voltage regulator tube U2 is connected to the sixteenth voltage dividing resistor R 16 The second end.

[0053] It should be noted that, in some embodiments, the capacitor subunit may also be provided with multiple supercapacitors, such as 2, 3, etc. Figure 5 FIG. 1 shows a capacitor subunit with two supercapacitors, wherein the supercapacitors are connected in series in sequence, and each supercapacitor is provided with a fifteenth voltage-dividing resistor R as described above. 15 , the sixteenth voltage-dividing resistor R 16 , the seventeenth voltage-dividing resistor R 17 And the circuit structure of the voltage regulator U2. The voltage regulator can be used to stabilize the voltage when power supply fluctuates during the charging and discharging process of the supercapacitor to protect the subsequent circuit from damage. The above includes the fifteenth voltage-dividing resistor R 15 , the sixteenth voltage-dividing resistor R 16 , the seventeenth voltage-dividing resistor R 17 The circuit structure of the voltage regulator U2 can balance the voltage output by the super capacitor, wherein the fifteenth voltage-dividing resistor R 15 Plays the role of current limiting, and the sixteenth voltage divider resistor R16 and the seventeenth voltage-dividing resistor R 17 The output voltage of the voltage regulator U2 is controlled by voltage division.

[0054] It can be understood that when the main power supply or the auxiliary power supply is supplied, based on the 13th voltage-dividing resistor R13, the emitter terminal and the base terminal of the first PNP transistor Q5 can be connected to the corresponding voltage and generate current, so that the first PNP transistor Q5 is turned on. Similarly, since the first PNP transistor Q5 is turned on, the current can pass through the 14th voltage-dividing resistor R 14 And the fourteenth voltage dividing resistor R 14 A voltage drop is generated on the base of the second PNP transistor Q6, and the corresponding current can be connected to the base terminal, and the conduction condition is met. In addition, since the Schottky diode D4 is connected in the forward direction and the power failure has not occurred at this time, the logic control unit does not connect the capacitor subunit and the boost subunit. In this regard, the grounded supercapacitor C s1 Charging can start.

[0055] At the same time, the second PNP transistor Q5 and the 13th voltage divider resistor R 13 And the fourteenth voltage-dividing resistor R 14 It also forms an overcurrent protection branch, and large current can pass through the second PNP transistor Q5 and the fourteenth voltage-dividing resistor R 14 The second diode D3 and the Schottky diode D4 can both prevent reverse connection and prevent the supercapacitor from backflowing to the main and auxiliary power supplies after being fully charged.

[0056] When power failure occurs, the current connected to the base and emitter of the first PNP transistor Q5 changes due to the change of the connected voltage, thereby turning off the first PNP transistor Q5; similarly, the second PNP transistor Q6 also no longer meets the conduction condition and is turned off. In addition, when power failure occurs, the logic control unit connects the capacitor subunit and the boost subunit. In this regard, the supercapacitor C s1 Able to start discharging, thus providing a short but sufficient power guarantee for critical circuits.

[0057] It can be seen that the capacitor subunit provides power-off protection for the device through capacitor discharge, that is, it can provide short-term and sufficient power guarantee, so that the edge gateway device can complete the storage of important data, status recording and orderly shutdown operations, effectively prevent data loss and system damage, and help improve the data security and system stability of the device.

[0058] Figure 6The schematic diagram of the circuit structure of the boost subunit provided in one embodiment of the present application is that the boost subunit boosts the voltage after receiving the voltage released by the super capacitor, thereby providing sufficient voltage for the subsequent circuit. Figure 6 As shown, in one embodiment, the boost subunit includes a boost converter U3, a first inductor L1, an eighteenth voltage-dividing resistor R 18 , the nineteenth voltage-dividing resistor R 19 、The 20th voltage resistor R 20 、The 21st voltage dividing resistor R 21 , the second current limiting resistor R c2 , the third current limiting resistor R c3 , the fourth current limiting resistor R c4 , the second pull-up resistor R pu2 , a fourth filter capacitor C4, a fifth filter capacitor C5, a sixth filter capacitor C6, a seventh filter capacitor C7, an eighth filter capacitor C8, a ninth filter capacitor C9 and a third diode D5.

[0059] The frequency selection pin FSEL of the boost converter U3 is connected to the second current limiting resistor R c2 , the second current limiting resistor R c2 The grounded end is connected to the first end of the fourth filter capacitor C4, the second end of the fourth filter capacitor C4 is used as the input end of the boost subunit, the second end of the fourth filter capacitor C4 is also connected to the grounded fifth filter capacitor C5, the second current limiting resistor R c2 Together with the fourth filter capacitor C4, a filter circuit is formed to filter the signal of the frequency selection pin FSEL.

[0060] The enable pin EN of the boost converter U3 is also connected to the third current limiting resistor R c3 Connect the eighteenth voltage divider resistor R 18 The first end of the eighteenth voltage-dividing resistor R 18 The second end of the eighth voltage-dividing resistor R 18 The first end is also connected to the grounded nineteenth voltage-dividing resistor R 19 , the eighteenth voltage-dividing resistor R 18 and the nineteenth voltage-dividing resistor R 19 It is used to set the enable voltage divider ratio for the enable pin EN; and the third current limiting resistor R c3 Used to limit the current connected to the enable pin EN.

[0061] The input pin IN of the boost converter U3 is connected to the second end of the fourth filter capacitor C4, and the input pin IN of the boost converter U3 is also connected to the first end of the first inductor L1. The second end of the first inductor L1 is connected to the switch pin SW of the boost converter U3. The second end of the first inductor L1 is also connected to the anode end of the third diode D5. The cathode end of the third diode D5 serves as the output end of the boost sub-unit. The cathode end of the third diode D5 is also grounded through the seventh filter capacitor C7, and the eighth filter capacitor C8 is connected in parallel with the seventh filter capacitor C7.

[0062] The feedback pin FB of the boost converter U3 is connected to the output of the boost converter U3 through the second pull-up resistor R pu2 The feedback voltage is connected, and the feedback pin FB of the boost converter U3 is connected to the nineteenth voltage divider resistor R 19 The first end of the nineteenth voltage-dividing resistor R 19 The second end of the third diode D5 is connected to the cathode end of the third diode D5, and the nineteenth voltage-dividing resistor R 19 The second end is also connected to the grounded second decibel resistor R 20 , the nineteenth voltage-dividing resistor R 19 and the second ten-degree resistor R 20 It is used to set the feedback voltage divider ratio for the feedback pin FB, and the second pull-up resistor R pu2 Used for feedback signal to limit current.

[0063] In addition, the synchronous rectification selection pin SS of the boost converter U3 is connected to the sixth filter capacitor C6 connected to the ground. The monitoring pin COMP of the boost converter U3 is connected in series with the ninth filter capacitor C9 and the twenty-first voltage-dividing resistor R 21 Ground, the ninth filter capacitor C9 and the twenty-first voltage divider resistor R 21 A filter circuit is formed to filter the signal of the monitoring pin COMP.

[0064] The first inductor L1 is used for energy storage and filtering of the boost converter U3. Especially during the switching operation, the first inductor L1 can smooth the current and reduce the noise caused by the switch. Moreover, the third diode D5 is used in conjunction with the first inductor L1 to convert the energy released by the inductor into direct current and provide a path to prevent the current from flowing in the reverse direction when the inductor current changes.

[0065] In this regard, after the boost converter U3 is connected to the voltage provided by the supercapacitor, it boosts the voltage, and then transmits it to the power output module at the next stage through the cathode end of the third diode D5, thereby realizing the power-off protection function when there is a power-off situation.

[0066] In some embodiments, the power output module includes a common cathode diode and a voltage conversion submodule, the first input end of the common cathode diode is connected to the output end of the power switching module, the second input end of the common cathode diode is connected to the power supply output end of the capacitor power supply unit, and the output end of the common cathode diode is connected to the input end of the voltage conversion submodule. It can be understood that the two input ends of the common cathode diode are respectively connected to the output end of the power switching module and the power supply output end of the capacitor power supply unit. When the power is not off, the voltage provided by the power switching module is connected to the voltage conversion submodule, and when the power is off, the voltage provided by the capacitor power supply unit is connected to the voltage conversion submodule. Moreover, the common cathode diode can also prevent the voltage at the other end from flowing back, thereby playing a protective role. It should be noted that in some embodiments, two diodes connected with a common cathode can be used to replace the above-mentioned common cathode diode.

[0067] The voltage conversion submodule is used to convert the voltage connected through the common cathode diode, such as boosting and / or stepping down. Moreover, the voltage conversion submodule and the main power access module both include an input filter unit, a voltage conversion unit and an output filter unit connected in sequence, wherein the input filter unit is used to filter the connected voltage signal, and the output filter unit is used to filter the converted voltage signal, for example, using multiple parallel capacitors to filter the input and output. As for the voltage conversion unit, the voltage conversion submodule and the main power access module can use voltage conversion units with the same circuit structure, and of course, voltage conversion units with different circuit structures can also be used.

[0068] Figure 7 A schematic diagram of the circuit structure of a voltage conversion submodule provided in an embodiment of the present application is shown in FIG. Figure 7 As shown, in one embodiment, the voltage conversion submodule is connected to four parallel capacitors at the input end and the output end respectively to serve as an input filter unit and an output filter unit respectively, so as to filter the input end and the output end. Through the above-mentioned parallel capacitors, the voltage conversion submodule can smooth voltage fluctuations, reduce noise interference and effectively filter out high-frequency noise, protect the subsequent circuit from interference, thereby improving the stability of the output voltage.

[0069] The voltage conversion unit includes a first DCDC chip U4, a twenty-second voltage-dividing resistor R 22 、The twenty-third voltage-dividing resistor R 23 、The twenty-fourth voltage-dividing resistor R 24 、The tenth filter capacitor C 10 、Eleventh filter capacitor C 11 and a second inductor L2.

[0070] Specifically, the input pin IN of the first DCDC chip U4 is connected to the output end of the input filter unit, and the input pin IN of the first DCDC chip U4 is also connected to the twenty-second voltage-dividing resistor R22 The first end of the 22nd voltage divider resistor R 22 The second end passes through the tenth filter capacitor C 10 The ground pin GND and the enable pin EN of the first DCDC chip U4 are both connected to the 22nd voltage-dividing resistor R 22 The frequency selection pin LX of the first DCDC chip U4 is connected to the first end of the second inductor L2, the second end of the second inductor L2 is connected to the output end of the output filter unit, and the second end of the second inductor L2 is also connected to the twenty-third voltage-dividing resistor R 23 The first end of the twenty-third voltage-dividing resistor R 23 The second end of the 24th voltage-dividing resistor R 24 The first end of the twenty-fourth voltage-dividing resistor R 24 The second end of the first DCDC chip U4 is grounded, and the feedback pin FB of the first DCDC chip U4 is connected to the twenty-third voltage-dividing resistor R 23 The second end of the eleventh filter capacitor C 11 Connect the twenty-fourth voltage-dividing resistor R in parallel 24 .

[0071] Among them, the 22nd voltage divider resistor R 22 And the tenth filter capacitor C 10 The RC filter circuit is formed to filter and decouple the enable pin EN. 23 and the twenty-fourth voltage-dividing resistor R 24 It is used to divide the voltage of the feedback pin FB, and the twenty-fourth voltage-dividing resistor R 24 and the eleventh filter capacitor C 11 An RC filter is formed to filter and decouple the signal of the feedback pin FB. The second inductor L2 is used to store energy during the switching action and release energy when the switch is closed to maintain the continuous current of the circuit and inhibit the current change, which helps to smooth the output current and reduce the current fluctuation and ripple.

[0072] Figure 8 A schematic diagram of the circuit structure of a main power access module provided in an embodiment of the present application is shown in FIG. Figure 8 As shown, in one embodiment, the main power access module is also connected to four parallel capacitors at the input end and the output end respectively, to serve as an input filter unit and an output filter unit respectively, so as to filter the input end and the output end. The above-mentioned parallel capacitors can smooth voltage fluctuations, reduce noise interference and effectively filter high-frequency noise, protect the subsequent circuit from interference, thereby improving the stability of the output voltage.

[0073] In addition, the voltage conversion unit of the main power access module includes a second DCDC chip U5, a twenty-fifth voltage dividing resistor R 25、The twenty-sixth voltage-dividing resistor R 26 、The twenty-seventh voltage-dividing resistor R 27 、The 28th voltage dividing resistor R 28 , the twelfth filter capacitor C 12 、Thirteenth filter capacitor C 13 , bootstrap capacitor C b and a third inductor L3.

[0074] Specifically, the input pin VIN of the second DCDC chip U5 is connected to the output end of the input filter unit, and the input pin VIN of the second DCDC chip U5 is also connected to the twenty-fifth voltage-dividing resistor R 25 The first end of the twenty-fifth voltage-dividing resistor R 25 The second end of the resistor R 26 The enable pin EN of the second DCDC chip U5 is connected to the twenty-fifth voltage-dividing resistor R 25 The second end of the twelfth filter capacitor C 12 Connected in parallel to the 26th voltage divider resistor R 26 The switch pin SW of the second DCDC chip U5 is connected to the first end of the third inductor L3, the second end of the third inductor L3 is connected to the output end of the output filter unit, and the second end of the third inductor L3 is also connected to the twenty-seventh voltage-dividing resistor R 27 The first end of the twenty-seventh voltage-dividing resistor R 27 The second end of the 28th voltage-dividing resistor R 28 The first end of the twenty-eighth voltage-dividing resistor R 28 The second end of the second DCDC chip U5 is grounded, and the feedback pin FB of the second DCDC chip U5 is connected to the twenty-seventh voltage-dividing resistor R 27 The second end of the thirteenth filter capacitor C 13 Connected in parallel with the 28th voltage divider resistor R 28 The boot pin BOOT of the second DCDC chip U5 is connected through the bootstrap capacitor C b Connect to the switch pin SW of the second DCDC chip U5.

[0075] Among them, the twenty-seventh voltage-dividing resistor R 27 and the twenty-eighth voltage-dividing resistor R 28The output of the second DCDC chip U5 can be adjusted, and the third inductor L3 can also be used to store and release energy to maintain the continuous current of the circuit, and has an inhibitory effect on current changes, which helps to smooth the output current and reduce current fluctuations and ripples. It can be understood that when the main power input voltage fluctuates within the allowable wide range, the main power access module can filter out high-frequency noise and interference through the input filter unit thereon, and then use the voltage conversion unit to convert the input voltage into a stable intermediate voltage according to the internal adjustment mechanism to maintain the output voltage. In this regard, the main power access module can take into account the power input requirements in different application scenarios, and provide a wide voltage input range, and then can access different voltages, so that the edge gateway device can operate stably in different countries and regions and different voltage environments, thereby improving the applicability and flexibility of the device.

[0076] In addition, the above-mentioned voltage conversion submodule and main power access module adopt a high-efficiency DC-DC step-down circuit, which not only improves the efficiency of power conversion, but also reduces the energy consumption of the entire system.

[0077] The present application also provides a circuit board, which includes the above-mentioned gateway power circuit. In this regard, the circuit board can realize real-time monitoring of the main power supply voltage through the gateway power circuit thereon. Once the main power supply voltage is detected to exceed the preset safety range, the system will immediately trigger the power switching mechanism and seamlessly switch to the auxiliary power supply, thereby greatly shortening the equipment downtime caused by power failure and ensuring the continuity and stability of the system. It can also quickly cut off the power supply of key circuits when the power is suddenly interrupted, and quickly provide power support through high-performance super capacitors as a backup power supply, thereby ensuring that key data is not lost and effectively protecting the data security and integrity of the system.

[0078] The present application also provides an edge gateway device, which includes the above-mentioned circuit board. The edge gateway device is connected to the main power supply and the auxiliary power supply, and the main and auxiliary power supplies of the system are switched through the circuit board, thereby ensuring the continuity and stability of the system. A high-performance supercapacitor is used as a backup power supply, so that the power-off protection capability of the device is improved. When the power supply is abnormal, the device can quickly obtain power support, thereby ensuring that key data is not lost, and effectively protecting the data security and integrity of the system.

[0079] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including 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, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0080] Note that the above are only preferred embodiments of the present application and the technical principles used. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present application. Therefore, although the present application is described in more detail through the above embodiments, the present application is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A gateway power supply circuit, characterized in that: The gateway power supply circuit is used to access the main power supply and the auxiliary power supply, and the gateway power supply circuit includes: A main power access module, the input end of which is used to access the main power supply, and the main power access module is used to reduce the voltage of the main power supply; A power switching module, wherein a first input end of the power switching module is connected to an output end of the main power access module, a second input end of the power switching module is used to access the auxiliary power supply, and the power switching module is used to output a power supply voltage when the main power supply and / or the auxiliary power supply are connected; A power-off protection module, the power-off protection module includes a power-off detection unit, a logic control unit and a capacitor power supply unit, the detection end of the power-off detection unit is connected to the output end of the power switching module, the output end of the power-off detection unit is connected to the signal access end of the logic control unit, the control output end of the logic control unit is connected to the power supply control end of the capacitor power supply unit, the power supply access end of the capacitor power supply unit is also connected to the output end of the power switching module, the power-off detection unit is used to detect the power supply voltage output by the power switching module for the logic control unit and determine whether the power is off, the logic control unit is used to output a control signal to control the capacitor power supply unit to start power supply when the power is off, and the capacitor power supply unit is used to start power supply when receiving the control signal, and use the power supply voltage for charging when the power supply is not turned on; A power output module, wherein the first input end of the power output module is connected to the output end of the power switching module, the second input end of the power output module is connected to the power supply output end of the capacitor power supply unit, and the power output module is used to perform voltage conversion so that the circuit outputs a voltage that adapts to the load.

2. The gateway power supply circuit according to claim 1, characterized in that: The power switching module includes a first PMOS tube, a second PMOS tube, a first voltage-dividing resistor, a second voltage-dividing resistor, a third voltage-dividing resistor, a fourth voltage-dividing resistor, a fifth voltage-dividing resistor, a sixth voltage-dividing resistor, a first diode, a first NPN transistor and an electrostatic discharge diode; The drain end of the first PMOS tube serves as the first input end of the power switching module, the drain end of the first PMOS tube is connected to the first end of the first voltage-dividing resistor, the second end of the first voltage-dividing resistor is connected to the first end of the second voltage-dividing resistor, and the second end of the second voltage-dividing resistor is grounded; The source terminal of the first PMOS tube serves as the output terminal of the power switching module, the source terminal of the first PMOS tube is connected to the first terminal of the third voltage-dividing resistor, the second terminal of the third voltage-dividing resistor is connected to the first terminal of the fourth voltage-dividing resistor, and the first terminal of the fourth voltage-dividing resistor is also connected to the gate terminal of the first PMOS tube; The collector terminal of the first NPN transistor is connected to the second end of the fourth voltage-dividing resistor, the base terminal of the first NPN transistor is connected to the input voltage through the fifth voltage-dividing resistor, the base terminal of the first NPN transistor is also connected to the emitter terminal of the first NPN transistor through the sixth voltage-dividing resistor, and the emitter terminal of the first NPN transistor is also grounded; The drain terminal of the second PMOS tube serves as the second input terminal of the power switching module, the drain terminal of the second PMOS tube is also connected to a grounded electrostatic discharge diode, the gate terminal of the second PMOS tube is connected to the first end of the second voltage-dividing resistor, the source terminal of the second PMOS tube is connected to the anode terminal of the first diode, and the cathode terminal of the first diode is connected to the source terminal of the first PMOS tube.

3. The gateway power supply circuit according to claim 1, characterized in that: The power-off detection unit includes an operational amplifier, a seventh voltage-dividing resistor, an eighth voltage-dividing resistor, a ninth voltage-dividing resistor, a tenth voltage-dividing resistor, a feedback resistor and a first pull-up resistor; The non-inverting input terminal of the operational amplifier is connected to the first end of the seventh voltage-dividing resistor, the first end of the seventh voltage-dividing resistor is also connected to the grounded eighth voltage-dividing resistor, the second end of the seventh voltage-dividing resistor is connected to the power supply voltage output by the power switching module, and the non-inverting input terminal of the operational amplifier is also connected to the output terminal of the operational amplifier through the feedback resistor; The inverting input terminal of the operational amplifier is connected to the first end of the ninth voltage-dividing resistor, the first end of the ninth voltage-dividing resistor is also connected to the grounded tenth voltage-dividing resistor, and the second end of the ninth voltage-dividing resistor is connected to the power supply voltage; The output end of the operational amplifier is also connected to the supply voltage through the first pull-up resistor.

4. The gateway power supply circuit according to claim 1 or 3, characterized in that: The logic control unit includes a microcontroller, a second NPN transistor, a first current limiting resistor, an eleventh voltage-dividing resistor, a twelfth voltage-dividing resistor, a first filter capacitor, a second filter capacitor, a third filter capacitor and a third PMOS tube; The first GPIO pin of the microcontroller serves as a signal access terminal of the logic control unit, the second GPIO pin of the microcontroller is connected to the first end of the first current limiting resistor, the second end of the first current limiting resistor is connected to the base end of the second NPN transistor, and the second GPIO pin of the microcontroller is used to output an enable signal when power is off; The collector terminal of the second NPN transistor is grounded, the gate terminal of the second NPN transistor is connected to the collector terminal of the second NPN transistor through the eleventh voltage-dividing resistor, and the first filter capacitor is connected in parallel to the eleventh voltage-dividing resistor; The emitter terminal of the second NPN transistor is connected to the drain terminal of the third PMOS transistor, the emitter terminal of the second NPN transistor is also connected to the source terminal of the third PMOS transistor through the twelfth voltage-dividing resistor, and the second filter capacitor is connected in parallel to the twelfth voltage-dividing resistor; The drain terminal and the source terminal of the third PMOS tube are respectively used as control output terminals of the logic control unit, and the drain terminal of the third PMOS tube is also connected to the grounded third filter capacitor.

5. The gateway power supply circuit according to claim 1, characterized in that: The capacitor power supply unit includes a capacitor subunit and a boost subunit; The power supply end of the capacitor subunit is connected to the output end of the power switching module, so as to charge the capacitor of the capacitor subunit through the power supply voltage output by the power switching module; The output end of the capacitor subunit is connected to the control output end of the logic control unit, and the input end of the boost subunit is also connected to the control output end of the logic control unit. The input end of the boost subunit serves as the power supply control end of the capacitor power supply unit. The output end of the boost subunit is connected to the second input end of the power output module. When the logic control unit outputs a control signal, the boost subunit is connected to the capacitor subunit to perform a boost conversion on the voltage provided by the capacitor subunit.

6. The gateway power supply circuit according to claim 5, characterized in that: The capacitor subunit includes a thirteenth voltage-dividing resistor, a fourteenth voltage-dividing resistor, a fifteenth voltage-dividing resistor, a sixteenth voltage-dividing resistor, a seventeenth voltage-dividing resistor, a first PNP transistor, a second PNP transistor, a second diode, a Schottky diode, a supercapacitor and a voltage-stabilizing diode; The emitter terminal of the first PNP transistor is connected to the output terminal of the power switching module, the emitter terminal of the first PNP transistor is connected to the base terminal of the first PNP transistor through the 13th voltage-dividing resistor, and the base terminal of the first PNP transistor is also connected to the emitter terminal of the second PNP transistor, and the collector terminal of the first PNP transistor is connected to the base terminal of the second PNP transistor; The base terminal of the second PNP transistor is connected to the grounded fourteenth voltage-dividing resistor, the collector terminal of the second PNP transistor is connected to the anode terminal of the Schottky diode, the cathode terminal of the Schottky diode is connected to the positive terminal of the super capacitor, and the negative terminal of the super capacitor is grounded; The anode end of the second diode is connected to the anode end of the Schottky diode, and the cathode end of the second diode is connected to the cathode end of the Schottky diode; The first end of the fifteenth voltage-dividing resistor is connected to the positive terminal of the supercapacitor, the second end of the fifteenth voltage-dividing resistor is connected to the input end of the voltage-dividing diode, the first end of the fifteenth voltage-dividing resistor is also connected to the first end of the sixteenth voltage-dividing resistor, the second end of the sixteenth voltage-dividing resistor is connected to the first end of the seventeenth voltage-dividing resistor, the second end of the seventeenth voltage-dividing resistor is connected to the output end of the voltage-dividing diode, and the ground end of the voltage-dividing diode is connected to the second end of the sixteenth voltage-dividing resistor.

7. The gateway power supply circuit according to claim 5 or 6, characterized in that: The boost subunit includes a boost converter, a first inductor, an eighteenth voltage-dividing resistor, a nineteenth voltage-dividing resistor, a twentieth voltage-dividing resistor, a twenty-first voltage-dividing resistor, a second current-limiting resistor, a third current-limiting resistor, a fourth current-limiting resistor, a second pull-up resistor, a fourth filter capacitor, a fifth filter capacitor, a sixth filter capacitor, a seventh filter capacitor, an eighth filter capacitor, a ninth filter capacitor and a third diode; The frequency selection pin of the boost converter is connected to a grounded second current limiting resistor, one end of the second current limiting resistor is connected to a first end of the fourth filter capacitor, the second end of the fourth filter capacitor serves as an input end of the boost subunit, and the second end of the fourth filter capacitor is also connected to a grounded fifth filter capacitor; The enable pin of the boost converter is also connected to the first end of the eighteenth voltage-dividing resistor through the third current-limiting resistor, the second end of the eighteenth voltage-dividing resistor is connected to the second end of the fourth filter capacitor, and the first end of the eighteenth voltage-dividing resistor is also connected to the grounded nineteenth voltage-dividing resistor; The synchronous rectification selection pin of the boost converter is connected to the grounded sixth filter capacitor; The input pin of the boost converter is connected to the second end of the fourth filter capacitor, the input pin of the boost converter is also connected to the first end of the first inductor, the second end of the first inductor is connected to the switch pin of the boost converter, the second end of the first inductor is also connected to the anode end of the third diode, the cathode end of the third diode serves as the output end of the boost subunit, the cathode end of the third diode is also grounded through the seventh filter capacitor, and the eighth filter capacitor is connected in parallel to the seventh filter capacitor; The feedback pin of the boost converter is connected to the feedback voltage through the second pull-up resistor, the feedback pin of the boost converter is connected to the first end of the nineteenth voltage-dividing resistor, the second end of the nineteenth voltage-dividing resistor is connected to the cathode end of the third diode, and the second end of the nineteenth voltage-dividing resistor is also connected to the grounded second voltage-dividing resistor; The monitoring pin of the boost converter is grounded via the ninth filter capacitor and the twenty-first voltage-dividing resistor connected in series.

8. The gateway power supply circuit according to claim 1, characterized in that: The power output module includes a common cathode diode and a voltage conversion submodule, wherein a first input end of the common cathode diode is connected to an output end of the power switching module, a second input end of the common cathode diode is connected to a power supply output end of the capacitor power supply unit, and an output end of the common cathode diode is connected to an input end of the voltage conversion submodule; The voltage conversion submodule and the main power access module both include an input filter unit, a voltage conversion unit and an output filter unit connected in sequence, the input filter unit is used to filter the connected voltage signal, and the output filter unit is used to filter the converted voltage signal; Wherein, the voltage conversion unit includes a first DCDC chip, a twenty-second voltage-dividing resistor, a twenty-third voltage-dividing resistor, a twenty-fourth voltage-dividing resistor, a tenth filter capacitor, an eleventh filter capacitor and a second inductor, an input pin of the first DCDC chip is connected to the output end of the input filter unit, the input pin of the first DCDC chip is also connected to the first end of the twenty-second voltage-dividing resistor, the second end of the twenty-second voltage-dividing resistor is grounded through the tenth filter capacitor, the ground pin and the enable pin of the first DCDC chip are both connected to the second end of the twenty-second voltage-dividing resistor, the frequency selection pin of the first DCDC chip is connected to the first end of the second inductor, the second end of the second inductor is connected to the output end of the output filter unit, the second end of the second inductor is also connected to the first end of the twenty-third voltage-dividing resistor, the second end of the twenty-third voltage-dividing resistor is connected to the first end of the twenty-fourth voltage-dividing resistor, the second end of the twenty-fourth voltage-dividing resistor is grounded, the feedback pin of the first DCDC chip is connected to the second end of the twenty-third voltage-dividing resistor, and the eleventh filter capacitor is connected in parallel to the twenty-fourth voltage-dividing resistor; Or, the voltage conversion unit includes a second DCDC chip, a twenty-fifth voltage-dividing resistor, a twenty-sixth voltage-dividing resistor, a twenty-seventh voltage-dividing resistor, a twenty-eighth voltage-dividing resistor, a twelfth filter capacitor, a thirteenth filter capacitor, a bootstrap capacitor and a third inductor, the input pin of the second DCDC chip is connected to the output end of the input filter unit, the input pin of the second DCDC chip is also connected to the first end of the twenty-fifth voltage-dividing resistor, the second end of the twenty-fifth voltage-dividing resistor is grounded through the twenty-sixth voltage-dividing resistor, the enable pin of the second DCDC chip is connected to the second end of the twenty-fifth voltage-dividing resistor, and the twelfth filter capacitor is connected in parallel to the twenty-sixth voltage-dividing resistor. resistor, a switch pin of the second DCDC chip is connected to a first end of the third inductor, a second end of the third inductor is connected to the output end of the output filter unit, a second end of the third inductor is also connected to a first end of the twenty-seventh voltage-dividing resistor, a second end of the twenty-seventh voltage-dividing resistor is connected to a first end of the twenty-eighth voltage-dividing resistor, a second end of the twenty-eighth voltage-dividing resistor is grounded, a feedback pin of the second DCDC chip is connected to the second end of the twenty-seventh voltage-dividing resistor, the thirteenth filter capacitor is connected in parallel to the twenty-eighth voltage-dividing resistor, and a startup pin of the second DCDC chip is connected to a switch pin of the second DCDC chip through the bootstrap capacitor.

9. A circuit board, characterized in that: The gateway power supply circuit comprises the gateway power supply circuit as claimed in any one of claims 1 to 8.

10. An edge gateway device, characterized in that: Comprising the circuit board as claimed in claim 9.

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