Voltage conversion circuit and electronic equipment

Abstract

The utility model relates to the technical field of electronic power, in particular to a voltage conversion circuit and electronic equipment, and the voltage conversion circuit comprises an input interface and an output interface, and the input interface comprises a live wire interface, a zero line interface and a ground wire interface; the input end of the rectifying circuit is connected with the live wire interface and the null line interface; the input end of the transformer is connected with the output end of the rectifying circuit, and the output end of the transformer is connected with the output interface; the output interface is also connected with a ground wire interface; the first protection assembly is arranged on a connection path connected with the output interface, and the first protection assembly is used for preventing current overload on the connection path; the voltage conversion circuit provided by the utility model is used for preventing equipment damage caused by connection of the live wire and the ground wire.

Description

Technical Field

[0001] The present disclosure relates to the field of electronic power technology, and in particular to a voltage conversion circuit and electronic equipment. Background Art

[0002] The live wire is the primary power transmission line in the power system, responsible for delivering power from the power source to the load. As the active end connecting the power source, the live wire has high voltage, high frequency, and high power characteristics.

[0003] The neutral wire acts as the return path for current in an electrical system, carrying current from the load device back to the power supply. It is typically connected to the neutral point of the power supply and provides a stable zero potential reference for electrical equipment.

[0004] A ground wire is a conductor in an electrical system or electronic device that is connected to the earth, the housing, or a reference potential of zero. On general electrical appliances, the ground wire is connected to the housing to prevent electric shock accidents caused by internal insulation failure and the housing becoming live.

[0005] If the ground, neutral, and live wires are incorrectly connected or confused, serious safety hazards can arise. For example, reversing the ground and neutral wires can disable leakage protection devices, increasing the risk of electric shock. Reversing the live and neutral wires, or the ground wires, can expose electrical equipment to high voltage, potentially damaging the equipment or even catching fire. Furthermore, incorrectly connecting the ground, neutral, and live wires can hinder current flow, leading to overheating, line loss, and other issues, jeopardizing personal safety. Utility Model Content

[0006] The present disclosure provides a voltage conversion circuit and an electronic device to prevent damage to the device caused by the connection of a live wire and a ground wire.

[0007] In a first aspect, the present disclosure provides a voltage conversion circuit, comprising: an input interface and an output interface, wherein the input interface includes a live wire interface, a neutral wire interface, and a ground wire interface; a rectifier circuit, wherein the input end of the rectifier circuit is connected to the live wire interface and the neutral wire interface; a transformer, wherein the input end of the transformer is connected to the output end of the rectifier circuit, and the output end of the transformer is connected to the output interface; the output interface is also connected to the ground wire interface; and a first protection component, wherein the first protection component is arranged on a connection path connected to the output interface, and the first protection component is used to prevent current overload on the connection path.

[0008] In some embodiments, the voltage conversion circuit also includes: an output capacitor; the output interface includes a positive electrode interface and a negative electrode interface, and the transformer includes a positive output end and a negative output end; wherein, the positive electrode interface is connected to the positive output end through a first transmission line, the negative electrode interface is connected to the negative output end through a second transmission line, the first electrode plate of the output capacitor is connected to the first transmission line, and the second electrode plate of the output capacitor is connected to the second transmission line.

[0009] In some embodiments, the first protection component is disposed on the second transmission line.

[0010] In some embodiments, the ground interface is connected to the second transmission line through a third transmission line, and the first protection component is disposed on the third transmission line.

[0011] In some embodiments, the voltage conversion circuit further includes: an output diode, which is arranged on a connection path between the output interface and the transformer.

[0012] In some embodiments, the voltage conversion circuit further includes: an input capacitor, a first electrode plate of the input capacitor is connected to the output end of the rectifier circuit, and a second electrode plate of the input capacitor is grounded.

[0013] In some embodiments, the voltage conversion circuit further includes: a second protection component, which is disposed in a connection path between the live wire interface and the rectifier circuit.

[0014] In some embodiments, the voltage conversion circuit further includes: an indication unit connected to the output interface, and the indication unit is configured to be triggered when the output interface outputs an electrical signal.

[0015] In some embodiments, the input interface is electrically connected to a power plug corresponding to a device to which the voltage conversion circuit belongs.

[0016] In a second aspect, the present disclosure provides an electronic device, including a power plug, a power cable and a device body, wherein the power plug is connected to the device body via the power cable, and the power plug and / or the device body are provided with a voltage conversion circuit as provided in the first aspect above.

[0017] The embodiment of the present disclosure connects the ground interface directly to the output interface. When a large current appears on the ground interface, the ground interface and the output interface form a loop and current flows. At this time, the first protection component set on the connection path between the ground interface and the output interface is disconnected, thereby causing a large current to appear on the ground cable, thereby preventing damage to the equipment caused by the connection between the live wire and the ground wire.

[0018] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1A schematic diagram of the structure of a voltage conversion circuit provided in an embodiment of the present disclosure;

[0021] Figure 2 A schematic diagram of the specific structure of the first voltage conversion circuit provided in an embodiment of the present disclosure;

[0022] Figure 3 A schematic diagram of the specific structure of the second voltage conversion circuit provided in an embodiment of the present disclosure;

[0023] Figure 4 A schematic structural diagram of a voltage conversion circuit with an indication unit provided in an embodiment of the present disclosure;

[0024] Among them, the voltage conversion circuit 100, the input interface 101, the rectifier circuit 201, the transformer 202, the output interface 102, the first protection component 203, and the indication unit 301;

[0025] Live wire interface L, neutral wire interface N, ground wire interface G, positive electrode interface V+, negative electrode interface V-, output diode D201, input capacitor C101, output capacitor C102, rectifier bridge BD101, first protection component F201, second protection component F101, indicator light LED201, protection resistor R2. DETAILED DESCRIPTION

[0026] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0027] In the description of this disclosure, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features being described. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of this disclosure, "plurality" means two or more, unless otherwise specifically defined.

[0028] In this disclosure, the word "exemplary" is used to mean "serving as an example, illustration, or illustration." Any embodiment described in this disclosure as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is given to enable any person skilled in the art to implement and use the present disclosure. In the following description, details are listed for the purpose of explanation. It should be understood that one of ordinary skill in the art will recognize that the present disclosure can be implemented without these specific details. In other instances, well-known structures and processes are not elaborated in detail to avoid obscuring the description of the present disclosure with unnecessary details. Therefore, the present disclosure is not intended to be limited to the embodiments shown, but is to be consistent with the widest scope consistent with the principles and features disclosed herein.

[0029] At the same time, this disclosure uses specific terms to describe the embodiments of the present disclosure. For example, "one embodiment," "an embodiment," and / or "some embodiments" refer to a certain feature, structure, or characteristic associated with at least one embodiment of the present disclosure. Therefore, it should be emphasized and noted that "one embodiment," "an embodiment," or "an alternative embodiment" mentioned twice or more in different places in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the present disclosure may be appropriately combined.

[0030] Similarly, it should be noted that, in order to simplify the presentation of this disclosure and thus facilitate understanding of one or more disclosed embodiments, the foregoing descriptions of the disclosed embodiments sometimes combine multiple features into a single embodiment, figure, or description thereof. However, this disclosure method does not imply that the disclosed subject matter requires more features than those recited in the claims. In practice, an embodiment may have fewer features than all of the features of a single disclosed embodiment.

[0031] In some embodiments, numbers are used to describe the quantity of components and attributes. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise stated, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the description and claims are approximate values, which may change according to the required characteristics of individual embodiments. In some embodiments, the numerical parameters should consider specifying significant digits and adopting the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of the present disclosure are approximate values, in specific embodiments, the settings of such numerical values are as accurate as possible within the feasible range.

[0032] Each patent, patent application, patent application publication, and other materials, such as articles, books, specifications, publications, and documents, cited in this disclosure is hereby incorporated by reference in its entirety, except for any application history that is inconsistent with or conflicts with this disclosure, and except for any document (currently or later appended to this disclosure) that limits the broadest scope of the claims of this disclosure. It should be noted that if there is any inconsistency or conflict between the descriptions, definitions, and / or terminology in the accompanying materials and the examples in this disclosure, the descriptions, definitions, and / or terminology in this disclosure will control.

[0033] If the ground, neutral, and live wires are incorrectly connected or confused, serious safety hazards can arise. For example, reversing the ground and neutral wires can disable leakage protection devices, increasing the risk of electric shock. Reversing the live and neutral wires, or the ground wires, can expose electrical equipment to high voltage, potentially damaging the equipment or even catching fire. Furthermore, incorrectly connecting the ground, neutral, and live wires can hinder current flow, leading to overheating, line loss, and other issues, jeopardizing personal safety.

[0034] An embodiment of the present disclosure provides a voltage conversion circuit to prevent equipment damage caused by the connection of a live wire and a ground wire.

[0035] The voltage conversion circuit provided by this embodiment is described in detail below with reference to the accompanying drawings. Figure 1 , Figure 1 This is a schematic diagram of the structure of the voltage conversion circuit provided in this embodiment. The voltage conversion circuit 100 includes an input interface 101, a rectifier circuit 201, a transformer 202 and an output interface 102.

[0036] Among them, the input interface 101 includes a live wire interface L, a neutral wire interface N, and a ground wire interface G. In one example, the input interface 101 can be directly set as a three-terminal plug; in this case, the live wire interface L corresponds to the live wire terminal on the right side of the three-terminal plug, the neutral wire interface N corresponds to the neutral wire terminal on the left side of the three-terminal plug, and the ground wire interface G corresponds to the upper ground wire terminal of the three-terminal plug. In another example, the input interface 101 can be set on the device side and connected to the power plug through a power supply cable; in this case, the live wire interface L is connected to the live wire terminal in the power plug through the power supply cable, the neutral wire interface N is connected to the neutral wire terminal in the power plug through the power supply cable, and the ground wire interface G is connected to the ground wire terminal in the power plug through the power supply cable, that is, the input interface 101 is electrically connected to the power plug corresponding to the device described in the voltage conversion circuit 100.

[0037] The input end of the rectifier circuit 201 is connected to the live wire interface L and the neutral wire interface N. The input end of the transformer 202 is connected to the output end of the rectifier circuit 201 , and the output end of the transformer 202 is connected to the output interface 102 .

[0038] Regarding the rectifier circuit 201, the rectifier circuit 201 can be implemented as a half-bridge circuit or a full-bridge circuit. When the rectifier circuit 201 adopts a half-bridge circuit, the rectifier circuit 201 includes one bridge arm, the two ends of which are respectively connected to the live wire interface L and the neutral wire interface N, and the midpoint of the bridge arm is connected to the transformer 202. When the rectifier circuit 201 adopts a full-bridge circuit, the rectifier circuit 201 includes at least two bridge arms, at least two bridge arms are arranged in parallel between the live wire interface L and the neutral wire interface N, and the midpoints of at least two bridge arms are connected to the transformer 202. The power devices provided in the bridge arms include various types of controllable transistors and uncontrollable transistors. The uncontrollable transistors include diodes, and the controllable transistors include at least any of the following: thyristors, metal oxide semiconductor field effect transistors (MOSFETs), insulated gate bipolar transistors (IGBTs), silicon carbide transistors, and gallium nitride transistors.

[0039] Regarding the transformer 202, the transformer 202 can be set to be coupled with the same end or coupled with the opposite end. Those skilled in the art can replace the connection relationship of the subsequent circuit based on the specific setting form of the transformer 202; therefore, this embodiment does not specifically limit the transformer 202.

[0040] The voltage conversion circuit 100 provided in this embodiment further includes a first protection component 203, wherein the output interface 102 is also connected to the ground interface G; the first protection component 203 is arranged on a connection path connected to the output interface 102, and the first protection component 203 is used to prevent current overload on the connection path.

[0041] Specifically, the reasons for the large current on the ground interface G may include: a short circuit between the power supply cable corresponding to the ground interface G and the power supply cable corresponding to the live wire L or the power supply cable corresponding to the neutral wire N, for example, the insulation protective layer of the transmission cable is damaged, resulting in the power supply cable. And / or, the plug terminal corresponding to the ground interface G is connected to the socket hole corresponding to the live wire L or the socket hole corresponding to the neutral wire N. For example, for some sockets with non-compliant specifications, the plug terminal corresponding to the ground interface G is mistakenly inserted into the socket hole corresponding to the live wire L or the socket hole corresponding to the neutral wire N.

[0042] In this embodiment, the ground interface G is directly connected to the output interface 102. When a large current appears on the ground interface G, the ground interface G and the output interface 102 form a loop and current flows. At this time, the first protection component 203 set on the connection path between the ground interface G and the output interface 102 is disconnected, so that a large current appears on the ground cable, thereby preventing damage to the equipment caused by the connection between the live wire and the ground wire.

[0043] In some embodiments, the first protection component 203 is composed of devices such as a fuse, an air switch or a fuse tube, so that when a large current appears in the line, the first protection component 203 adaptively opens the circuit, thereby preventing damage to the equipment.

[0044] refer to Figure 2 and Figure 3 , Figure 2 and Figure 3 Detailed structural diagrams of two voltage conversion circuits provided in this embodiment.

[0045] In some embodiments, output interface 102 includes a positive terminal V+ and a negative terminal V-, and transformer 202 includes a positive output terminal and a negative output terminal. The positive terminal V+ is connected to the positive output terminal via a first transmission line, and the negative terminal V- is connected to the negative output terminal via a second transmission line. The positive terminal V+ and the negative terminal V- can be considered a DC power supply for outputting a DC voltage and a DC current for use by the device to which voltage conversion circuit 100 belongs.

[0046] In some embodiments, the voltage conversion circuit 100 further includes an output capacitor C102, wherein a first electrode plate of the output capacitor C102 is connected to the first transmission line, and a second electrode plate of the output capacitor C102 is connected to the second transmission line. The output capacitor C102 is used for output filtering to improve the stability of the output voltage of the output interface 102. In a specific application scenario, the output capacitor C102 can be configured based on an electrolytic capacitor, wherein electrolytic capacitors have advantages such as a larger capacitance value compared to ordinary capacitors.

[0047] In some embodiments, reference Figure 2 , the first protection component 203 (F201) is set on the second transmission line.

[0048] In some embodiments, reference Figure 3 The ground interface G is connected to the second transmission line through the third transmission line, and the first protection component 203 (F201) is set on the third transmission line.

[0049] In some embodiments, reference Figure 2 and Figure 3 The first protection component 203 (F201) can be set on the second transmission line and also on the third transmission line where the ground interface G is connected to the second transmission line.

[0050] In some embodiments, the voltage conversion circuit 100 further includes an output diode D201, which is disposed on a path between the output interface 102 and the transformer 202. Specifically, in one example, referring to Figure 2 and Figure 3The input end of the output diode D201 is connected to the positive output end of the transformer 202, and the output end of the output diode D201 is connected to the positive terminal V+; the output diode D201 is set between the output terminal 102 and the transformer 202 to avoid reverse transmission of current.

[0051] In some embodiments, the second transmission line also needs to be grounded to ensure that the potential of the second transmission line connected to the negative terminal V- is 0.

[0052] In some embodiments, the voltage conversion circuit 100 further includes an input capacitor C101, wherein a first electrode plate of the input capacitor C101 is connected to the output terminal of the rectifier circuit 201, and a second electrode plate of the input capacitor C101 is grounded. The input capacitor C101 is used for input filtering to improve the stability of the rectified current output voltage. In a specific application scenario, the input capacitor C101 can be configured based on an electrolytic capacitor, which has advantages over ordinary capacitors, such as a larger capacitance value.

[0053] In the example of this embodiment, the rectifier circuit 201 is formed based on the rectifier bridge BD101. The rectifier bridge BD101 can be regarded as a full-bridge circuit including four diodes D1, D2, D3 and D4.

[0054] like Figure 2 and Figure 3 For example, the input end of D1 is connected to the live wire interface L, and the output end of D1 is connected to one end of the transformer 202; the input end of D2 is connected to the neutral wire interface N, and the output end of D2 is connected to one end of the transformer 202; the input end of D3 is grounded, and the output end of D3 is connected to the neutral wire interface N; the input end of D4 is grounded, and the output end of D4 is connected to the live wire interface L.

[0055] It should be noted that, since the other end of the input coil of the transformer 202 is grounded in this embodiment, the input ends of D3 and D4 are also grounded accordingly; in some embodiments, the input ends of D3 and D4 may be connected to the other end of the transformer 202 .

[0056] In some embodiments, the voltage conversion circuit 100 further includes a second protection component F101, which is disposed in the connection path between the live wire interface L and the rectifier circuit 201. In some embodiments, the second protection component F101 is constructed using a device such as a fuse, an air switch, or a fuse tube, so that when a large current flows in the line, the second protection component F101 adaptively opens the circuit, thereby preventing the flow of extremely large currents in the transmission line during normal operation of the device.

[0057] In some embodiments, the specifications of the second protection component F101 can be set to be smaller than the specifications of the first protection component 203 (F201), that is, the current value allowed to pass through the second protection component F101 is smaller than the current value allowed to pass through the first protection component 203 (F201), so that the first protection component 203 (F201) and the second protection component F101 adapt to the required protection function.

[0058] refer to Figure 4 , Figure 4 This is a schematic diagram of the structure of a voltage conversion circuit provided in this embodiment, including an indicator unit 301. The voltage conversion circuit 100 further includes the indicator unit 301, which is connected to the output interface 102. The indicator unit 301 is configured to trigger when the output interface 102 outputs an electrical signal. Specifically, when the output interface 102 outputs an electrical signal, it indicates that the device to which the voltage conversion circuit 100 belongs is operating normally. In this case, the indicator unit 301 triggers to indicate that the device is operating normally.

[0059] In some embodiments, the indication unit 301 is configured as an optical indication. Figure 4 The indication unit 301 includes an indicator light LED201 and a protective resistor R2. When the output interface 102 outputs an electrical signal, the positive electrode interface V+ can also form a loop through the indicator light LED201, the protective resistor R2 and the negative electrode interface V-. At this time, current passes through the branch where the indicator light LED201 and the protective resistor R2 are located. The indicator light LED201 lights up to provide corresponding indications. The protective resistor R2 is used to increase the impedance of the branch where it is located to prevent damage to the equipment due to a large current in the branch.

[0060] In this embodiment, the ground interface is directly connected to the output interface. When a large current appears on the ground interface, the ground interface and the output interface form a loop in which current flows. At this time, the first protection component set on the connection path between the ground interface and the output interface is disconnected, thereby causing a large current to appear on the ground cable, thereby preventing damage to the equipment caused by the connection between the live wire and the ground wire.

[0061] It should be noted that, in the absence of conflict, the features disclosed in the voltage conversion circuit 100 provided in the above embodiments can be randomly combined to obtain a new embodiment of the voltage conversion circuit 100 .

[0062] Another embodiment of the present disclosure provides an electronic device that can prevent damage to the device caused by the connection of a live wire and a ground wire. The electronic device includes a power plug, a power cable, and a device body. The power plug is connected to the device body via the power cable. The electronic device is also provided with the voltage conversion circuit 100 mentioned in the above embodiment.

[0063] In one example, the voltage conversion circuit 100 mentioned in the above embodiment is provided in the power plug.

[0064] Specifically, the input interface 101 in the voltage conversion circuit 100 can be directly set to a three-terminal plug; in this case, the live wire interface L corresponds to the live wire terminal on the right side of the three-terminal plug, the neutral wire interface N corresponds to the neutral wire terminal on the left side of the three-terminal plug, and the ground wire interface G corresponds to the upper ground wire terminal of the three-terminal plug.

[0065] In another example, the voltage conversion circuit 100 mentioned in the above embodiment is disposed in the device body.

[0066] Specifically, the input interface 101 in the voltage conversion circuit 100 can be set on the device side and connected to the power plug through a power cable; at this time, the live wire interface L is connected to the live wire terminal in the power plug through the power cable, the neutral wire interface N is connected to the neutral wire terminal in the power plug through the power cable, and the ground wire interface G is connected to the ground wire terminal in the power plug through the power cable.

[0067] In another example, the voltage conversion circuit 100 mentioned in the above embodiment is provided in the power plug and the device body. Specifically, based on the above two examples, part of the circuit of the voltage conversion circuit 100 is provided in the power plug, and part of the circuit is provided in the device body, which will not be described in detail in this embodiment.

[0068] In this embodiment, the ground interface is directly connected to the output interface. When a large current appears on the ground interface, the ground interface and the output interface form a loop in which current flows. At this time, the first protection component set on the connection path between the ground interface and the output interface is disconnected, thereby causing a large current to appear on the ground cable, thereby preventing damage to the equipment caused by the connection between the live wire and the ground wire.

[0069] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, please refer to the detailed description of other embodiments above and will not be repeated here.

[0070] While the basic concepts have been described above, it will be apparent to those skilled in the art that the detailed disclosure is merely illustrative and does not limit the present disclosure. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and revisions to the present disclosure. Such modifications, improvements, and revisions are suggested in the present disclosure and remain within the spirit and scope of the exemplary embodiments of the present disclosure.

[0071] The above is a detailed introduction to a voltage conversion circuit and electronic device provided by an embodiment of the present disclosure. Specific examples are used herein to illustrate the principles and implementation methods of the present disclosure. The description of the above embodiments is only used to help understand the method and core idea of the present disclosure. At the same time, for technical personnel in this field, based on the ideas of the present disclosure, there will be changes in the specific implementation methods and application scope. In summary, it can be seen that the content of this specification should not be understood as a limitation on the present disclosure.

Claims

1. A voltage conversion circuit, characterized in that: include: An input interface and an output interface, wherein the input interface includes a live wire interface, a neutral wire interface and a ground wire interface; A rectifier circuit, wherein an input end of the rectifier circuit is connected to the live wire interface and the neutral wire interface; a transformer, wherein an input end of the transformer is connected to an output end of the rectifier circuit, and an output end of the transformer is connected to the output interface; The output interface is also connected to the ground interface; A first protection component is provided on a connection path connected to the output interface, and is used to prevent current overload on the connection path.

2. The voltage conversion circuit according to claim 1, wherein: Also includes: Output capacitor; The output interface includes a positive electrode interface and a negative electrode interface, and the transformer includes a positive electrode output terminal and a negative electrode output terminal; Among them, the positive electrode interface is connected to the positive output end through a first transmission line, the negative electrode interface is connected to the negative output end through a second transmission line, the first electrode plate of the output capacitor is connected to the first transmission line, and the second electrode plate of the output capacitor is connected to the second transmission line.

3. The voltage conversion circuit according to claim 2, wherein: The first protection component is disposed on the second transmission line.

4. The voltage conversion circuit according to claim 2, wherein: The ground interface is connected to the second transmission line through a third transmission line, and the first protection component is arranged on the third transmission line.

5. The voltage conversion circuit according to any one of claims 1 to 4, characterized in that: Also includes: An output diode is provided on a connection path between the output interface and the transformer.

6. The voltage conversion circuit according to any one of claims 1 to 4, characterized in that: The circuit further comprises an input capacitor, wherein a first electrode plate of the input capacitor is connected to the output end of the rectifier circuit, and a second electrode plate of the input capacitor is grounded.

7. The voltage conversion circuit according to any one of claims 1 to 4, characterized in that: Also includes: A second protection component is provided in a connection path between the live wire interface and the rectifier circuit.

8. The voltage conversion circuit according to any one of claims 1 to 4, characterized in that: Also includes: An indication unit is connected to the output interface, and is configured to be triggered when the output interface outputs an electrical signal.

9. The voltage conversion circuit according to any one of claims 1 to 4, characterized in that: The input interface is electrically connected to a power supply plug corresponding to the device to which the voltage conversion circuit belongs.

10. An electronic device, characterized in that: include: A power supply plug, a power supply cable and a device body, wherein the power supply plug is connected to the device body via the power supply cable, and the power supply plug and / or the device body are provided with a voltage conversion circuit according to any one of claims 1 to 9.

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