Surge current suppression circuit and driving power supply

Abstract

The utility model relates to a surge current suppression circuit and a driving power supply. The surge current suppression circuit comprises a zero-cross detection module, a voltage division module, a control module, a driving module and a VCC power supply module. The zero-cross detection module performs zero-cross detection and outputs a zero-cross detection signal; the control module respectively generates a driving signal and an enabling signal according to the zero-cross detection signal; the driving module is switched on according to the driving signal; and the VCC power supply module transmits a power supply signal to the APFC module and the DC-DC module according to the enable signal. According to the utility model, the zero-crossing detection module is adopted to detect the zero-crossing point, and the control module respectively outputs the driving signal and the enable signal according to the zero-crossing point, so that the driving module controls the conduction of a switching device of the APFC module, and then VCC of the APFC module and VCC of the DC-DC module are enabled through the enable signal, thereby enabling the driving power supply to work normally, effectively suppressing the input surge current, and improving the reliability of the driving power supply. The problem that the wiring cost is increased due to the fact that the number of driving power sources connected in parallel is reduced can be avoided, and efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of switching power supplies, and more specifically to a surge current suppression circuit and a driving power supply. Background Art

[0002] LED lighting has the advantages of high efficiency, energy saving, environmental protection, and long life, and is gradually replacing traditional lighting. For the core component of LED lighting, the driver power supply, due to the presence of large electrolytic capacitors in the power supply, often generates surge current at the moment of power-on, and the huge surge current will cause the air switch to trip.

[0003] In order to solve the problem of air switch tripping caused by surge current, the current method usually adopts reducing the number of parallel drive power supplies or adding NTC inside the drive power supply. However, reducing the parallel drive power supply will increase the wiring cost, and adding NTC inside the drive power supply will affect the efficiency of the drive power supply. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a surge current suppression circuit and a driving power supply.

[0005] The technical solution adopted by the utility model to solve the technical problem is: constructing a surge current suppression circuit, including: a zero-crossing detection module, a voltage division module, a control module, a driving module and a VCC power supply module;

[0006] The input end of the zero-crossing detection module is connected to the AC input voltage, the output end of the zero-crossing detection module is connected to the input end of the voltage divider module, the output end of the voltage divider module is connected to the control module, the first output end of the control module is connected to the input end of the drive module, the output end of the drive module is connected to the APFC module, the second output end of the control module is connected to the VCC power supply module, and the VCC power supply module is respectively connected to the APFC module and the DC-DC module;

[0007] The zero-crossing detection module is used to perform zero-crossing detection on the AC input voltage and output a zero-crossing detection signal;

[0008] The control module generates a driving signal and an enabling signal respectively according to the zero-crossing detection signal;

[0009] The driving module is turned on according to the driving signal;

[0010] The VCC power supply module is turned on according to the enable signal to transmit the power supply signal provided by the auxiliary source to the APFC module and the DC-DC module.

[0011] In the surge current suppression circuit described in the utility model, the zero-crossing detection module includes: a first sampling circuit and a second sampling circuit;

[0012] The input end of the first sampling circuit is connected to the neutral line, and the output end of the first sampling circuit is connected to the first input end of the voltage divider module; the input end of the second sampling circuit is connected to the live wire, and the output end of the second sampling circuit is connected to the second input end of the voltage divider module.

[0013] In the surge current suppression circuit described in the utility model, the first sampling circuit includes: a first sampling resistor, a second sampling resistor, a third sampling resistor and a fourth sampling resistor; the second sampling circuit includes: a fifth sampling resistor, a sixth sampling resistor, a seventh sampling resistor and an eighth sampling resistor;

[0014] The first sampling resistor, the second sampling resistor, the third sampling resistor and the fourth sampling resistor are sequentially connected in series between the neutral line and the first input end of the voltage divider module, and the fifth sampling resistor, the sixth sampling resistor, the seventh sampling resistor and the eighth sampling resistor are sequentially connected in series between the live line and the second input end of the voltage divider module.

[0015] In the surge current suppression circuit described in the utility model, the voltage dividing module includes: a first voltage dividing circuit and a second voltage dividing circuit;

[0016] The input end of the first voltage divider circuit is connected to the output end of the first sampling circuit as the first input end of the voltage divider module, and the output end of the first voltage divider circuit is connected to the first detection end of the control module; the input end of the second voltage divider circuit is connected to the output end of the second sampling circuit as the second input end of the voltage divider module, and the output end of the second voltage divider circuit is connected to the second detection end of the control module.

[0017] In the surge current suppression circuit described in the utility model, the first voltage-dividing circuit includes: a first voltage-dividing resistor, a second voltage-dividing resistor and a first filter capacitor; the second voltage-dividing circuit includes: a third voltage-dividing resistor, a fourth voltage-dividing resistor and a second filter capacitor;

[0018] A first end of the first voltage-dividing resistor is connected to an output end of the first sampling circuit, a second end of the first voltage-dividing resistor is connected to a second end of the second voltage-dividing resistor and a first detection end of the control module, and the first filter capacitor is connected in parallel with the second voltage-dividing resistor;

[0019] The first end of the third voltage-dividing resistor is connected to the output end of the second sampling circuit, the second end of the third voltage-dividing resistor is connected to the first end of the fourth voltage-dividing resistor and the second detection end of the control module, and the second filter capacitor is connected in parallel with the fourth voltage-dividing resistor.

[0020] In the surge current suppression circuit described in the utility model, the driving module includes: a driving circuit, a first switching circuit and a second switching circuit;

[0021] The input end of the driving circuit is connected to the driving end of the control module, the output end of the driving circuit is connected to the control end of the first switching circuit, the input end of the first switching circuit is connected to the auxiliary source; the second switching circuit is respectively connected to the control end of the first switching circuit and the APFC module.

[0022] In the surge current suppression circuit described in the utility model, the driving module further includes: a discharge circuit;

[0023] The discharge circuit is arranged in parallel with the second switch circuit.

[0024] In the surge current suppression circuit described in the utility model, the driving circuit includes: a first driving resistor and a second driving resistor; the first switching circuit includes: a voltage regulator tube, a first switching resistor, a switching tube and a second switching resistor; the second switching circuit includes: an RC resistor, an RC capacitor and a thyristor; the discharge circuit includes: a diode;

[0025] A first end of the first driving resistor is connected to a driving end of the control module, a second end of the first driving resistor is connected to a first end of the second driving resistor and a first end of the switch tube, and a second end of the second driving resistor is grounded;

[0026] The second end of the switch tube is connected to the auxiliary source through the first switch resistor, the third end of the switch tube is grounded through the second switch resistor, the third end of the switch tube is also connected to the first end of the RC resistor and the first end of the RC capacitor, the second end of the RC resistor is connected to the first end of the thyristor, the second end of the RC capacitor is grounded, the second end of the thyristor is connected to the APFC module, and the third end of the thyristor is grounded; the cathode of the diode is connected to the second end of the thyristor, and the anode of the diode is connected to the third end of the thyristor.

[0027] In the surge current suppression circuit described in the utility model, the control module includes: a primary control chip, a pull-down resistor and a pull-up resistor;

[0028] The first detection pin of the primary control chip is the first detection end of the control module, the second detection pin of the primary control chip is the second detection end of the control module, the driving pin of the primary control chip is the driving end of the control module, and the enable pin of the primary control chip is the enable end of the control module;

[0029] The driving pin of the primary control chip is connected to the input end of the driving module, and the driving pin of the primary control chip is also grounded through the pull-down resistor. The enable pin of the primary control chip is connected to the VCC power supply module, and the enable pin of the primary control chip is also connected to a high level through the pull-up resistor.

[0030] The utility model also provides a driving power supply, comprising: the surge current suppression circuit mentioned above.

[0031] The implementation of the inrush current suppression circuit and driving power supply of the utility model has the following beneficial effects: including: a zero-crossing detection module, a voltage dividing module, a control module, a driving module and a VCC power supply module; the zero-crossing detection module performs zero-crossing detection on the AC input voltage and outputs a zero-crossing detection signal; the control module generates a driving signal and an enabling signal respectively according to the zero-crossing detection signal; the driving module is turned on according to the driving signal; the VCC power supply module is turned on according to the enabling signal and transmits the power supply signal to the APFC module and the DC-DC module. The utility model adopts a zero-crossing detection module to detect the zero-crossing point of the AC input voltage and the control module outputs a driving signal and an enabling signal respectively according to the zero-crossing point, so as to control the switching device of the APFC module to be turned on through the driving module, and then enables the VCC of the APFC module and the DC-DC module through the enabling signal, so that the driving power supply can work normally, effectively suppress the input surge current, avoid the problem of increasing wiring costs due to reducing the number of parallel driving power supplies, and improve efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0033] Figure 1 This is a principle block diagram of the surge current suppression circuit provided by the utility model;

[0034] Figures 2 to 4 It is a partial circuit principle diagram of the surge current suppression circuit provided by the utility model. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] Figure 1 The schematic diagram shows a principle block diagram of a preferred embodiment of the surge current suppression circuit provided by the utility model.

[0037] like Figure 1 As shown, in this embodiment, the surge current suppression circuit includes: a zero-crossing detection module 21, a voltage divider module 22, a control module 23, a drive module 24 and a VCC power supply module 25. Among them, the input end of the zero-crossing detection module 21 is connected to the AC input voltage, the output end of the zero-crossing detection module 21 is connected to the input end of the voltage divider module 22, the output end of the voltage divider module 22 is connected to the control module 23, the first output end of the control module 23 is connected to the input end of the drive module 24, the output end of the drive module 24 is connected to the APFC module 13, the second output end of the control module 23 is connected to the VCC power supply module 25, and the VCC power supply module 25 is connected to the APFC module 13 and the DC-DC module 14 respectively.

[0038] Specifically, the zero-crossing detection module 21 is used to perform zero-crossing detection on the AC input voltage and output a zero-crossing detection signal; the control module 23 generates a drive signal and an enable signal according to the zero-crossing detection signal; the drive module 24 is turned on according to the drive signal; the VCC power supply module 25 is turned on according to the enable signal to transmit the power supply signal provided by the auxiliary source to the APFC module 13 and the DC-DC module 14.

[0039] In this embodiment, the control module 23 includes: a primary control chip, a pull-down resistor and a pull-up resistor.

[0040] In this embodiment, the first detection pin of the primary control chip is the first detection end of the control module 23, the second detection pin of the primary control chip is the second detection end of the control module 23, the driving pin of the primary control chip is the driving end of the control module 23, and the enable pin of the primary control chip is the enable end of the control module 23. Specifically, the driving pin of the primary control chip is connected to the input end of the driving module 24, the driving pin of the primary control chip is also grounded through a pull-down resistor, the enable pin of the primary control chip is connected to the VCC power supply module 25, and the enable pin of the primary control chip is also connected to a high level through a pull-up resistor.

[0041] In this embodiment, after receiving the zero-crossing detection signal, the primary control chip first outputs a drive signal through its drive pin to control the conduction of the drive module 24 through the drive signal, and then controls the conduction of the switch device connected in series between the APFC module 13 and the BUCLK capacitor through the drive module 24. However, it then outputs an enable signal to the VCC power supply module 25 through its enable terminal to control the VCC power supply module 25 to enable the VCC of the APFC module 13 and the DC-DC module 14, so that the drive power supply starts to work normally, thereby effectively avoiding the influence of surge current on the devices in the drive power supply, thereby achieving the purpose of suppressing surge current. At the same time, the utility model does not need to reduce the number of parallel drive power supplies, thereby avoiding the problem of increased wiring costs, and does not need to increase the NTC to affect the efficiency of the drive power supply, thereby achieving the purpose of improving the efficiency of the drive power supply.

[0042] Optionally, in this embodiment, the primary control chip can use the existing ML51TC0AE. By using the ML51TC0AE chip, the zero-crossing point of the AC input voltage can be detected according to the zero-crossing detection signal, so that after identifying the zero-crossing point, the drive signal is first output to turn on the drive module 24 to turn on the devices in the APFC module 13, and then the enable signal is output to control the VCC power supply module 25 to output the VCC signal to the APFC module 13 and the DC-DC module 14. At this time, the APFC module 13 and the DC-DC module 14 work normally, and the drive power supply works normally, thereby avoiding the influence of surge current and achieving the purpose of suppressing surge current. It should be noted that the embodiment of the utility model uses the function of ML51TC0AE, and does not improve its program.

[0043] Optionally, in this embodiment, the zero-crossing detection module 21 includes: a first sampling circuit and a second sampling circuit.

[0044] The input end of the first sampling circuit is connected to the neutral line, and the output end of the first sampling circuit is connected to the first input end of the voltage divider module 22; the input end of the second sampling circuit is connected to the live line, and the output end of the second sampling circuit is connected to the second input end of the voltage divider module 22. Specifically, in this embodiment, the AC input voltage is sampled by the first sampling circuit and the second sampling circuit to obtain a first sampling signal and a second sampling signal, respectively.

[0045] In this embodiment, the voltage dividing module 22 includes: a first voltage dividing circuit and a second voltage dividing circuit.

[0046] The input end of the first voltage divider circuit is connected to the output end of the first sampling circuit as the first input end of the voltage divider module 22, and the output end of the first voltage divider circuit is connected to the first detection end of the control module 23; the input end of the second voltage divider circuit is connected to the output end of the second sampling circuit as the second input end of the voltage divider module 22, and the output end of the second voltage divider circuit is connected to the second detection end of the control module 23.

[0047] In this embodiment, the driving module 24 includes: a driving circuit, a first switching circuit and a second switching circuit; the input end of the driving circuit is connected to the driving end of the control module 23, the output end of the driving circuit is connected to the control end of the first switching circuit, and the input end of the first switching circuit is connected to the auxiliary source; the second switching circuit is respectively connected to the control end of the first switching circuit and the APFC module 13.

[0048] Furthermore, in this embodiment, the driving module 24 further includes: a discharge circuit; the discharge circuit is arranged in parallel with the second switch circuit. Specifically, when the second switch circuit is turned on, the discharge circuit is used to form a discharge path with the electrolytic capacitor during the discharge process of the electrolytic capacitor in the APFC module 13, so that the electrolytic capacitor can be discharged normally.

[0049] In the embodiment of the utility model, the AC power supply module 10, the EMI module 11, the rectifier module 12, the APFC module 13, and the DC-DC module 14 are all conventional circuits in the driving power supply, and their circuit structures are all conventional structures. The working principles and functions implemented by each module can refer to the existing driving power supply (such as LED driving power supply), and the utility model will not be repeated here.

[0050] The surge current suppression circuit of the present utility model is described in detail below with reference to a specific embodiment.

[0051] Specifically, Figures 2 to 4 As shown, in this embodiment, the first sampling circuit includes: a first sampling resistor R104, a second sampling resistor R105, a third sampling resistor R106 and a fourth sampling resistor R107; the second sampling circuit includes: a fifth sampling resistor R108, a sixth sampling resistor R109, a seventh sampling resistor R110 and an eighth sampling resistor R111.

[0052] The first sampling resistor R104, the second sampling resistor R105, the third sampling resistor R106 and the fourth sampling resistor R107 are connected in series between the neutral line and the first input end of the voltage divider module 22, and the fifth sampling resistor R108, the sixth sampling resistor R109, the seventh sampling resistor R110 and the eighth sampling resistor R111 are connected in series between the live line and the second input end of the voltage divider module 22.

[0053] In this embodiment, the first voltage-dividing circuit includes: a first voltage-dividing resistor R720, a second voltage-dividing resistor R721 and a first filter capacitor C707; the second voltage-dividing circuit includes: a third voltage-dividing resistor R718, a fourth voltage-dividing resistor R719 and a second filter capacitor C706.

[0054] The first end of the first voltage-dividing resistor R720 is connected to the output end of the first sampling circuit (i.e., the second end of the fourth sampling resistor R107), the second end of the first voltage-dividing resistor R720 is connected to the second end of the second voltage-dividing resistor R721 and the first detection end of the control module 23, and the first filter capacitor C707 is connected in parallel with the second voltage-dividing resistor R721; the first end of the third voltage-dividing resistor R718 is connected to the output end of the second sampling circuit (i.e., the second end of the eighth sampling resistor R111), the second end of the third voltage-dividing resistor R718 is connected to the first end of the fourth voltage-dividing resistor R719 and the second detection end of the control module 23, and the second filter capacitor C706 is connected in parallel with the fourth voltage-dividing resistor R719.

[0055] In this embodiment, the driving circuit includes: a first driving resistor R222 and a second driving resistor R223; the first switch circuit includes: a voltage regulator tube ZD201, a first switch resistor R224, a switch tube Q203 and a second switch resistor R225; the second switch circuit includes: an RC resistor R226, an RC capacitor C207 and a thyristor; and the discharge circuit includes: a diode D204. Among them, SCR201 is a thyristor.

[0056] The first end of the first driving resistor R222 is connected to the driving end of the control module 23, the second end of the first driving resistor R222 is connected to the first end of the second driving resistor R223 and the first end of the switch tube Q203, and the second end of the second driving resistor R223 is grounded; the second end of the switch tube Q203 is connected to the anode of ZD201 through the first switching resistor R224, the cathode of the voltage regulator tube ZD201 is connected to the auxiliary source, the third end of the switch tube Q203 is grounded through the second switching resistor R225, the third end of the switch tube Q203 is also connected to the first end of the RC resistor R226 and the first end of the RC capacitor C207, the second end of the RC resistor R226 is connected to the first end of the thyristor, the second end of the RC capacitor C207 is grounded, the second end of the thyristor is connected to the APFC module 13, and the third end of the thyristor is grounded; the cathode of the diode D204 is connected to the second end of the thyristor, and the anode of the diode D204 is connected to the third end of the thyristor.

[0057] The VCC power supply module 25 includes: a resistor R259, a resistor R258, a capacitor C218, a MOS transistor Q208, a resistor R256, a resistor R257, a transistor Q207, a transistor Q206, a resistor R255, a capacitor C216, a voltage regulator D202, a diode D210, a resistor R260 and a capacitor C217. The diode D210 plays a role in temperature compensation.

[0058] The gate of the MOS tube Q208 is connected to the enable terminal of the primary control chip through the resistor R259 to receive the enable signal, the source of the MOS tube Q208 is grounded, the gate of the MOS tube Q208 is also grounded through the resistor R258, the capacitor C218 is connected in parallel with the resistor R258, the drain of the MOS tube Q208 is connected to the base of the transistor Q207 through the resistor R257, the emitter of the transistor Q207 is connected to the auxiliary source to access the power supply signal (VARU_PRI), the resistor R256 is connected between the base and the emitter of the transistor Q207, and the transistor The collector of transistor Q207 is connected to the collector of transistor Q206, the emitter of transistor Q206 outputs a VCC signal, the base of transistor Q206 is grounded via voltage regulator tube ZD202 and diode D210 in sequence, the collector of transistor Q206 is also grounded via capacitor C216, resistor R255 is connected between the base and collector of transistor Q206, a first end of capacitor C217 is connected to the emitter of transistor Q206, a second end of capacitor C217 is grounded, and resistor R260 is connected between the emitter and collector of transistor Q206.

[0059] like Figure 2As shown, UC1_VMAINS_N is the first sampling signal generated by the first sampling circuit, and UC1_VMAINS_L is the second sampling signal. The first sampling signal and the second sampling signal are the zero-crossing detection signals output by the zero-crossing detection module 21. Among them, UC1_VMAINS_N passes through the first voltage-dividing resistor R720 and the second voltage-dividing resistor R721, and then is filtered by the first filter capacitor C707, and then is transmitted to the first detection pin of the primary control chip (U702). UC1_VMAINS_L is divided by the third voltage-dividing resistor R718 and the fourth voltage-dividing resistor R719, and then is filtered by the second filter capacitor C706, and then is transmitted to the second detection pin of the primary control chip. The primary control chip detects the AC input voltage according to UC1_VMAINS_N and UC1_VMAINS_L. The voltage crosses the zero point, and when the zero point is detected, the driving end is controlled to output a driving signal (UC1_INRUSH), which is input to the driving module 24, and the first driving resistor R222 and the second driving resistor R223 divide the voltage and control the switch tube Q203 to be turned on (wherein VAUX_PRI is the power signal provided by the auxiliary source). After the switch tube Q203 is turned on, the thyristor is turned on, so that the electrolytic capacitor (CE201 in the figure) can be charged, and after CE201 is charged, the primary control chip outputs an enable signal (UC1_INRUSH) through its enable pin. _VCC_ENABLE), the enable signal drives the MOS tube Q208 to conduct through the resistor R259, thereby enabling the transistor Q207. When the transistor Q207 is conducted, VAUX_PRI first outputs the VCC signal to the APFC module 13 and the DC-DC module 14 through the transistor Q207 and the resistor R260. At this time, the APFC module 13 and the DC-DC module 14 can work normally, and the driving power supply starts to work normally. After the transistor Q207 is conducted, VAUX_PRI also charges the capacitor C216 through the transistor Q207. When the voltage on capacitor C216 reaches the turn-on voltage of transistor Q206, transistor Q206 is turned on. Since the resistance of transistor Q206 after being turned on is less than resistor R260, after transistor Q206 is turned on, VAUX_PRI outputs a stable VCC signal through transistor Q207 and transistor Q206 in turn (due to the voltage stabilizing effect of Zener diode ZD202, a stable VCC signal can be provided) APFC module 13 and DC-DC module 14. APFC module 13 and DC-DC module 14 work stably, and the driving power supply works stably.

[0060] The utility model also provides a driving power supply, which includes the surge current suppression circuit disclosed in the embodiment of the utility model. Optionally, the driving power supply can be an LED driving power supply.

[0061] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot limit the protection scope of the utility model. All equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.

Claims

1. A surge current suppression circuit, characterized in that: include: Zero-crossing detection module, voltage division module, control module, drive module and VCC power supply module; The input end of the zero-crossing detection module is connected to the AC input voltage, the output end of the zero-crossing detection module is connected to the input end of the voltage divider module, the output end of the voltage divider module is connected to the control module, the first output end of the control module is connected to the input end of the drive module, the output end of the drive module is connected to the APFC module, the second output end of the control module is connected to the VCC power supply module, and the VCC power supply module is respectively connected to the APFC module and the DC-DC module; The zero-crossing detection module is used to perform zero-crossing detection on the AC input voltage and output a zero-crossing detection signal; The control module generates a driving signal and an enabling signal respectively according to the zero-crossing detection signal; The driving module is turned on according to the driving signal; The VCC power supply module is turned on according to the enable signal to transmit the power supply signal provided by the auxiliary source to the APFC module and the DC-DC module.

2. The surge current suppression circuit according to claim 1, characterized in that: The zero-crossing detection module comprises: a first sampling circuit and a second sampling circuit; The input end of the first sampling circuit is connected to the neutral line, and the output end of the first sampling circuit is connected to the first input end of the voltage divider module; the input end of the second sampling circuit is connected to the live wire, and the output end of the second sampling circuit is connected to the second input end of the voltage divider module.

3. The surge current suppression circuit according to claim 2, characterized in that: The first sampling circuit includes: a first sampling resistor, a second sampling resistor, a third sampling resistor and a fourth sampling resistor; the second sampling circuit includes: a fifth sampling resistor, a sixth sampling resistor, a seventh sampling resistor and an eighth sampling resistor; The first sampling resistor, the second sampling resistor, the third sampling resistor and the fourth sampling resistor are sequentially connected in series between the neutral line and the first input end of the voltage divider module, and the fifth sampling resistor, the sixth sampling resistor, the seventh sampling resistor and the eighth sampling resistor are sequentially connected in series between the live line and the second input end of the voltage divider module.

4. The surge current suppression circuit according to claim 2, characterized in that: The voltage dividing module comprises: a first voltage dividing circuit and a second voltage dividing circuit; The input end of the first voltage divider circuit is connected to the output end of the first sampling circuit as the first input end of the voltage divider module, and the output end of the first voltage divider circuit is connected to the first detection end of the control module; the input end of the second voltage divider circuit is connected to the output end of the second sampling circuit as the second input end of the voltage divider module, and the output end of the second voltage divider circuit is connected to the second detection end of the control module.

5. The surge current suppression circuit according to claim 4, characterized in that: The first voltage-dividing circuit includes: a first voltage-dividing resistor, a second voltage-dividing resistor and a first filter capacitor; the second voltage-dividing circuit includes: a third voltage-dividing resistor, a fourth voltage-dividing resistor and a second filter capacitor; A first end of the first voltage-dividing resistor is connected to an output end of the first sampling circuit, a second end of the first voltage-dividing resistor is connected to a second end of the second voltage-dividing resistor and a first detection end of the control module, and the first filter capacitor is connected in parallel with the second voltage-dividing resistor; The first end of the third voltage-dividing resistor is connected to the output end of the second sampling circuit, the second end of the third voltage-dividing resistor is connected to the first end of the fourth voltage-dividing resistor and the second detection end of the control module, and the second filter capacitor is connected in parallel with the fourth voltage-dividing resistor.

6. The surge current suppression circuit according to claim 1, characterized in that: The driving module comprises: a driving circuit, a first switching circuit and a second switching circuit; The input end of the driving circuit is connected to the driving end of the control module, the output end of the driving circuit is connected to the control end of the first switching circuit, the input end of the first switching circuit is connected to the auxiliary source; the second switching circuit is respectively connected to the control end of the first switching circuit and the APFC module.

7. The surge current suppression circuit according to claim 6, characterized in that: The driving module further includes: a discharge circuit; The discharge circuit is arranged in parallel with the second switch circuit.

8. The surge current suppression circuit according to claim 7, characterized in that: The driving circuit includes: a first driving resistor and a second driving resistor; the first switching circuit includes: a voltage regulator, a first switching resistor, a switching tube and a second switching resistor; the second switching circuit includes: an RC resistor, an RC capacitor and a thyristor; the discharge circuit includes: a diode; A first end of the first driving resistor is connected to a driving end of the control module, a second end of the first driving resistor is connected to a first end of the second driving resistor and a first end of the switch tube, and a second end of the second driving resistor is grounded; The second end of the switch tube is connected to the auxiliary source through the first switch resistor, the third end of the switch tube is grounded through the second switch resistor, the third end of the switch tube is also connected to the first end of the RC resistor and the first end of the RC capacitor, the second end of the RC resistor is connected to the first end of the thyristor, the second end of the RC capacitor is grounded, the second end of the thyristor is connected to the APFC module, and the third end of the thyristor is grounded; the cathode of the diode is connected to the second end of the thyristor, and the anode of the diode is connected to the third end of the thyristor.

9. The surge current suppression circuit according to any one of claims 1 to 8, characterized in that: The control module includes: a primary control chip, a pull-down resistor and a pull-up resistor; The first detection pin of the primary control chip is the first detection end of the control module, the second detection pin of the primary control chip is the second detection end of the control module, the driving pin of the primary control chip is the driving end of the control module, and the enable pin of the primary control chip is the enable end of the control module; The driving pin of the primary control chip is connected to the input end of the driving module, and the driving pin of the primary control chip is also grounded through the pull-down resistor. The enable pin of the primary control chip is connected to the VCC power supply module, and the enable pin of the primary control chip is also connected to a high level through the pull-up resistor.

10. A driving power supply, characterized in that: include: The surge current suppression circuit according to any one of claims 1 to 9.

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