Port surge protection circuit and photoelectric remote power supply equipment

Abstract

The invention provides a port surge protection circuit, which comprises a discharge switch module used for selecting a discharge path for discharging a surge current according to a surge current direction and a signal mode, so as to reduce the surge current flowing through a chip, and the signal mode comprises a common mode and a differential mode. The invention further provides photoelectric remote supply equipment.

Description

Technical Field

[0001] The present disclosure relates to the fields of communication and network technologies, and particularly to a port surge protection circuit and an optical and electrical remote power supply device. Background Art

[0002] With the continuous development of communication technologies, the Power over Fiber (POF) technology has been increasingly widely used in network communication because it does not require separate laying of power lines. The POF technology realizes data transmission and remote power supply through an optical and electrical composite cable, improving the flexibility and reliability of the network. However, since the devices supporting the POE protocol are relatively fragile, POF devices need to face various environmental challenges, especially the port surge problem, which poses higher requirements for the stability and reliability of POF devices. Therefore, port surge protection is an important factor to ensure the stable operation of POF devices. Summary of the Invention

[0003] The present disclosure provides a port surge protection circuit and an optical and electrical remote power supply device.

[0004] In a first aspect, an embodiment of the present disclosure provides a port surge protection circuit, including:

[0005] A discharge switch module, configured to select a discharge path for discharging the surge current according to the surge current direction and the signal mode, so as to reduce the surge current flowing through the chip, where the signal mode includes a common mode and a differential mode.

[0006] In a second aspect, an embodiment of the present disclosure provides an optical and electrical remote power supply device, including:

[0007] A network device, configured to transmit data and supply power;

[0008] A port surge protection circuit, electrically connected to the power supply device of the network device, for reducing the surge current flowing into the network device, where the port surge protection circuit includes the port surge protection circuit provided in the embodiment of the present disclosure.

[0009] For the port surge protection circuit provided in the embodiment of the present disclosure, the discharge switch module selects a discharge path for discharging the surge current according to the surge current direction and the signal mode, that is, selects a low-impedance current-carrying path in the port surge protection circuit, so that the surge current is quickly discharged, reducing the surge current flowing through the chip, thereby reducing the impact of the surge on the chip and further improving the surge protection ability of the chip. Description of the Drawings

[0010] In the drawings of the embodiments of the present disclosure:

[0011] Figure 1The present disclosure provides a schematic structural diagram of a port surge protection circuit;

[0012] Figure 2 The present disclosure provides a schematic structural diagram of a discharge switch module;

[0013] Figure 3 The present disclosure provides a schematic structural diagram of a power supply side port surge protection circuit;

[0014] Figure 4 The present disclosure provides another schematic structural diagram of a power supply side port surge protection circuit;

[0015] Figure 5 The present disclosure provides a schematic structural diagram of surge protection of yet another power supply side port surge protection circuit;

[0016] Figure 6 The present disclosure provides a schematic structural diagram of yet another power supply side port surge protection circuit;

[0017] Figure 7 The present disclosure provides a schematic structural diagram of a power receiving side surge protection circuit;

[0018] Figure 8 The present disclosure provides a schematic diagram of a surge discharge path of a power supply device in differential mode;

[0019] Figure 9 The present disclosure provides another schematic diagram of a surge discharge path of a power supply device in differential mode;

[0020] Figure 10 The present disclosure provides a schematic diagram of a surge discharge path of a power supply device in common mode;

[0021] Figure 11 The present disclosure provides another schematic diagram of a surge discharge path of a power supply device in common mode;

[0022] Figure 12 The present disclosure provides a schematic diagram of a surge discharge path of a power receiving device;

[0023] Figure 13 The present disclosure provides another schematic diagram of a surge discharge path of a power receiving device;

[0024] Figure 14 The present disclosure provides a schematic structural diagram of an optical power remote feeding device. Detailed implementation manners

[0025] To enable those skilled in the art to better understand the technical solutions of the present disclosure, the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0026] The present disclosure will be described more fully hereinafter with reference to the accompanying drawings, but the illustrated embodiments may be embodied in different forms and the present disclosure should not be construed as limited to the embodiments set forth below. On the contrary, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0027] The drawings of the embodiments of the present disclosure are used to provide a further understanding of the embodiments of the present disclosure, and constitute a part of the specification, and are used to explain the present disclosure together with the detailed embodiments, and do not constitute a limitation to the present disclosure. By describing the detailed embodiments with reference to the accompanying drawings, the above and other features and advantages will become more apparent to those skilled in the art.

[0028] The present disclosure may be described with reference to plan views and / or cross-sectional views by means of the ideal schematic diagrams of the present disclosure. Therefore, the example illustrations may be modified according to manufacturing techniques and / or tolerances.

[0029] In the case of no conflict, the embodiments of the present disclosure and the features in the embodiments may be combined with each other.

[0030] The terms used in the present disclosure are only for describing specific embodiments and are not intended to limit the present disclosure. As used in the present disclosure, the term "and / or" includes any and all combinations of one or more of the associated listed items. As used in the present disclosure, the singular forms "a" and "the" are also intended to include the plural forms unless the context clearly indicates otherwise. As used in the present disclosure, the terms "comprising", "made of", specify the presence of the stated features, wholes, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their groups.

[0031] Unless otherwise defined, all terms (including technical and scientific terms) used in the present disclosure have the same meaning as commonly understood by those of ordinary skill in the art. It will also be understood that terms such as those defined in common dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted as having an idealized or overly formal meaning unless the present disclosure clearly so defines.

[0032] The present disclosure is not limited to the embodiments shown in the drawings, but includes modifications to the configurations formed based on the manufacturing process. Therefore, the regions illustrated in the drawings have schematic properties, and the shapes of the regions shown in the figures illustrate the specific shapes of the regions of the elements, but are not intended to be restrictive.

[0033] In some related technologies, the technologies that can achieve data transmission without an independent power supply include Power over Ethernet (POE) technology and Power over Fiber (POF) technology. However, both POE technology and POF technology have port surge problems. Moreover, as the application environment becomes harsher and harsher, the requirements for port surge protection of POF are getting higher and higher.

[0034] In a first aspect, an embodiment of the present disclosure provides a port surge protection circuit.

[0035] Figure 1 The following is a schematic structural diagram of a port surge protection circuit provided by an embodiment of the present disclosure. As Figure 1 shown, the port surge protection circuit provided by the embodiment of the present disclosure includes:

[0036] A discharge switch module 10, configured to select a discharge path for discharging the surge current according to the surge current direction and the signal mode, so as to reduce the surge current flowing through the chip, where the signal mode includes a common mode and a differential mode.

[0037] Among them, the surge current is generated by a surge generator, and the surge generator includes one or more of a router, a gateway, a switch, and a camera.

[0038] For the port surge protection circuit provided by the embodiment of the present disclosure, the discharge switch module selects a discharge path for discharging the surge current according to the surge current direction and the signal mode, that is, selects a low-impedance current-carrying path in the port surge protection circuit, so that the surge current is quickly discharged, reduces the surge current flowing through the chip, thereby reducing the impact of the surge on the chip, and further improving the surge protection ability of the chip.

[0039] In the embodiment of the present disclosure, the discharge switch module 10 is electrically connected to the circuit between the output end of the surge generator 20 and the chip 30. When the surge generator 20 generates a surge, the discharge switch module 10 selects a discharge path for the surge current according to the surge current direction and the signal mode, so as to reduce the surge voltage on the chip 30, thereby protecting the chip 30.

[0040] In some embodiments, as Figure 2 shown, the discharge switch module includes a protection module 11. The protection module 11 is arranged in parallel with the chip 30. The impedance of the protection module 11 changes with the volt-ampere characteristic, so that the impedance of the protection module 11 can be lower than that of the chip 30, so that the surge current flows through the protection module 11, avoiding damage to the chip 30.

[0041] In some embodiments, the protection module includes: at least one first unidirectional unit. The first end of the first unidirectional unit is electrically connected to the first end of the chip and the first end of the surge generator, and the second end of the first unidirectional unit is electrically connected to the second end of the chip.

[0042] In some embodiments, the first unidirectional unit includes a transient voltage suppression diode, or includes a transient voltage suppression diode and a varistor, and the transient voltage suppression diode and the varistor are arranged in parallel. It should be noted that when the first unidirectional unit only includes a transient voltage suppression diode, the reliability of the port surge protection circuit can be improved, and while accurately matching the impedance of the transient voltage suppression diode with the impedance of the surge path, the number of electronic devices can be reduced, thereby reducing the cost of the port surge protection circuit.

[0043] In the embodiments of the present disclosure, the chip includes a Power Sourcing Equipment (PSE) chip and / or a Powered Device (PD) chip. The PSE chip is used for the power supply side device, and the PD chip is used for the power receiving side device. In the embodiments of the present disclosure, different types of chips adopt different discharge switch modules.

[0044] For the PD chip, the discharge switch module includes a protection module. For the PSE chip, in addition to the protection module, the discharge switch module also includes structures such as a first unidirectional switch and a first control unit. For the convenience of description, taking the protection module including a transient voltage suppression diode (TVS) as an example, the discharge switch modules corresponding to the PSE chip and the PD chip will be introduced respectively below.

[0045] Figure 3 The figure is a schematic structural diagram of a port surge protection circuit on the power supply side provided by the embodiments of the present disclosure. As Figure 3 shown, the discharge switch module includes a protection module 11, and the protection module 11 includes four first unidirectional units arranged in parallel, namely a first TVS U1, a second TVS U2, a third TVS U3, and a fourth TVS U4. The first ends of the first TVS U1, the second TVS U2, the third TVS U3, and the fourth TVS U4 are all electrically connected to the first end of the surge generator 20, and the second ends of the first TVS U1, the second TVS U2, the third TVS U3, and the fourth TVS U4 are all electrically connected to the second end of the PSE chip 30.

[0046] Combined with Figure 2 and Figure 3 , when the chip is a PSE chip, the discharge switch module further includes: a first unidirectional switch 12 and a first control unit 13, wherein the first unidirectional switch 12 is arranged at the front stage of the protection module 11 and the chip 30, and the first unidirectional switch 12 is used to determine the direction of the surge current. The first control unit 13 is used to guide the discharge path.

[0047] In some embodiments, the surge current direction includes a positive surge current and a negative surge current. Among them, the positive surge current is a surge with the opposite signal polarity, that is, the surge current flowing from the positive pole to the negative pole of the surge generator, and the negative surge current is a surge with the same signal polarity, that is, the surge current flowing from the negative pole to the positive pole of the surge generator.

[0048] In some embodiments, the surge current flows from the first end of the first one-way switch 12 to the second end. The first one-way switch 12 includes a diode D1. The first end of the diode D1 is electrically connected to the first end of the surge generator 20, and the second end of the diode D1 is electrically connected to the first end of the chip 30. In some embodiments, the first end of the diode D1 is the positive pole of the diode D1, and the second end of the diode D1 is the negative pole of the diode D1.

[0049] As Figure 2 and Figure 3 shown, the signal mode includes a differential mode. The first control unit 13 includes: at least one group of first switch components. The first end of the first switch component is electrically connected to the first end of the surge generator, the second end of the first switch component is electrically connected to the second end of the power supply device chip, the third end of the first switch component is electrically connected to the third end of the power supply device chip, and the fourth end of the first switch component is electrically connected to the second end of the surge generator.

[0050] In some embodiments, the first switch component includes a second one-way switch, a third one-way switch, and a fourth one-way switch. Among them, for the second one-way switch, the first end of the second one-way switch is electrically connected to the second end of the surge generator, and the second end of the second one-way switch is electrically connected to the second end of the power supply device chip. For the third one-way switch, the first end of the third one-way switch is electrically connected to the second end of the surge generator, and the second end of the third one-way switch is electrically connected to the first end of the surge generator. For the fourth one-way switch, the first end of the fourth one-way switch is electrically connected to the third end of the power supply device chip, and the second end of the fourth one-way switch is electrically connected to the second end of the surge generator.

[0051] In some embodiments, each of the second one-way switch, the third one-way switch, and the fourth one-way switch includes one or more of a diode or a MOS transistor. In the embodiments of the present disclosure, the surge current in the second one-way switch, the third one-way switch, and the fourth one-way switch all flows from the first end to the second end. When the second one-way switch, the third one-way switch, and the fourth one-way switch are diodes, the first end of the second one-way switch, the third one-way switch, and the fourth one-way switch is the positive pole of the diode, and the second end of the second one-way switch, the third one-way switch, and the fourth one-way switch is the negative pole of the diode, and the surge current flows from the positive pole to the negative pole of the diode.

[0052] Next, taking the diode as an example, the first control unit and the first switch component will be introduced.

[0053] As Figure 3As shown, the first control unit 13 includes a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a sixth diode D6, and a seventh diode D7. Among them, the second diode D2, the third diode D3, and the fourth diode D4 form a first switch assembly, and the fifth diode D5, the sixth diode D6, and the seventh diode D7 form another first switch assembly. The second diode D2 and the fifth diode D5 are respectively the second one-way switches in the two first switch assemblies, the third diode D3 and the sixth diode D6 are respectively the third one-way switches in the two first switch assemblies, and the fourth diode D4 and the seventh diode D7 are respectively the third one-way switches in the two first switch assemblies.

[0054] The connection modes of the second diode D2, the third diode D3, the fourth diode D4, the fifth diode D5, the sixth diode D6, and the seventh diode D7 are as follows:

[0055] The first end of the second diode D2 is electrically connected to the second end of the surge generator 20, and the second end of the second diode D2 is electrically connected to the second end of the power supply device chip 30.

[0056] The first end of the third diode D3 is electrically connected to the second end of the surge generator 20, and the second end of the third diode D3 is electrically connected to the first end of the surge generator 20.

[0057] The first end of the fourth diode D4 is electrically connected to the third end of the power supply device chip 30, and the second end of the fourth diode D4 is electrically connected to the second end of the surge generator 20.

[0058] The first end of the fifth diode D5 is electrically connected to the second end of the surge generator 20, and the second end of the fifth diode D5 is electrically connected to the second end of the power supply device chip 30.

[0059] The first end of the sixth diode D6 is electrically connected to the second end of the surge generator 20, and the second end of the sixth diode D6 is electrically connected to the first end of the surge generator 20.

[0060] The first end of the seventh diode D7 is electrically connected to the third end of the power supply device chip 30, and the second end of the seventh diode D7 is electrically connected to the second end of the surge generator 20.

[0061] It should be noted that Figure 3 The port surge protection circuit shown only shows two first switch assemblies. In fact, the port surge protection circuit may include one or more first switch assemblies.

[0062] Such as Figure 4As shown, the signal mode is a common-mode mode. The first control unit includes: at least one group of first switch components. The first end of the first switch component is electrically connected to the first end of the surge generator. The second end of the first switch component is electrically connected to the second end of the power supply device chip. The third end of the first switch component is electrically connected to the third end of the power supply device chip. The fourth end of the first switch component is electrically connected to the second end of the surge generator; and at least one group of second switch components. The first end of the second switch component is electrically connected to the first end of the surge generator, and the second end of the second switch component is grounded.

[0063] In some embodiments, the second switch component includes: at least one second unidirectional unit arranged in parallel. The first end of the second unidirectional unit is electrically connected to the first end of the surge generator, and the second end of the second unidirectional unit is grounded. The second unidirectional unit is one or more of a transient voltage suppression diode and a varistor.

[0064] As Figure 4 shown, the first control unit includes a first switch component and a second switch component. Among them, the first switch component includes a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a sixth diode D6, and a seventh diode D7. The structure of the first switch component is the same as Figure 3 which will not be elaborated here.

[0065] The second switch component 14 includes a fifth TVS U5, a sixth TVS U6, a seventh TVS U7, and an eighth TVS U8 arranged in parallel. The first ends of the fifth TVS U5, the sixth TVS U6, the seventh TVS U7, and the eighth TVS U8 are all electrically connected to the first end of the surge generator 20, and the second ends of the fifth TVS U5, the sixth TVS U6, the seventh TVS U7, and the eighth TVS U8 are all grounded.

[0066] It should be noted that although Figure 3 and Figure 4 show four TVSs in the protection module 11 and the second switch component 14, the embodiments of the present disclosure are not limited thereto. The protection module 11 and the second switch component 14 can be provided with one TVS or n TVSs arranged in parallel. The present disclosure does not limit the number of TVSs. In the embodiments of the present disclosure, the more TVSs arranged in parallel, the stronger the surge protection ability.

[0067] In some embodiments, the discharge switch module further includes: at least one first inductor. The first end of the first inductor is electrically connected to the first end of the surge generator, and the second end of the first inductor is electrically connected to the first end of the first one-way switch; at least one second inductor. The first end of the second inductor is electrically connected to the second end of the power supply device chip, and the second end of the second inductor is electrically connected to the second end of the surge generator.

[0068] It should be noted that although the first inductor L1 and the second inductor L2 can improve the surge protection ability to a certain extent, the first inductor L1 and the second inductor L2 increase the cost of the surge protection circuit and reduce the integration level. Moreover, there is a risk of damage to the inductor under high surge current. Therefore, the discharge switch module does not include the first inductor L1 and the second inductor L2, which helps to improve the integration level and stability of the port surge protection circuit.

[0069] As Figure 5 shown, in the differential mode, the discharge switch module includes a plurality of first inductors L1 and a plurality of second inductors L2. Each pair of the first inductor L1 and the second inductor L2 corresponds to a port. Only two pairs of the first inductor L1 and the second inductor L2 are shown in Figure 5 . The first end of the first inductor L1 is electrically connected to the first end of the surge generator 20. The second end of the first inductor L1 is electrically connected to the first end of the first diode D1, and is also electrically connected to the first ends of the first TVS U1, the second TVS U2, the third TVS U3, and the fourth TVS U4. The first end of the second inductor L2 is electrically connected to the second end of the chip 30. The second end of the second inductor L2 is electrically connected to the second end of the surge generator 20.

[0070] Figure 6 is a schematic structural diagram of another port surge protection circuit provided by an embodiment of the present disclosure. As Figure 6 shown, in the common mode, the port surge protection circuit includes a discharge switch module. The discharge switch module includes: a protection module 11, a first one-way switch 12, a first control unit 13, at least one first inductor L1, and at least one second inductor L2. Among them, the structures and connection manners of the protection module 11, the first one-way switch 12, and the first control unit 13 are the same as those of the discharge switch module shown in Figure 4 , and will not be described in detail here.

[0071] The first end of the first inductor L1 is electrically connected to the first end of the surge generator 20. The second end of the first inductor L1 is electrically connected to the first end of the first diode D1, and is also electrically connected to the first ends of the first TVS U1, the second TVS U2, the third TVS U3, and the fourth TVS U4. The first end of the second inductor L2 is electrically connected to the second end of the chip 30. The second end of the second inductor L2 is electrically connected to the second end of the surge generator 20.

[0072] Figure 7 is a schematic structural diagram of a power receiving side port surge protection circuit provided by an embodiment of the present disclosure. As Figure 7As shown, the port surge protection circuit includes a discharge switch module. The discharge switch module includes a protection module 11. The protection module 11 includes four first unidirectional units arranged in parallel, namely a first TVS U1, a second TVS U2, a third TVS U3, and a fourth TVS U4. The first ends of the first TVS U1, the second TVS U2, the third TVS U3, and the fourth TVS U4 are all electrically connected to the first end of the surge generator 20 and the first end of the powered device chip 40. The second ends of the first TVS U1, the second TVS U2, the third TVS U3, and the fourth TVS U4 are all electrically connected to the second end of the surge generator 20 and the second end of the powered device chip 40.

[0073] It should be noted that although four first unidirectional units are shown in Figure 7 , for the powered device, the protection module 11 includes one or more first unidirectional units, that is, the number of the first unidirectional units is not limited in the embodiments of the present disclosure.

[0074] In the embodiments of the present disclosure, the discharge switch module in the port surge protection circuit selects a discharge path for discharging the surge current according to the surge current direction and the signal mode, and different types of chips select different discharge paths.

[0075] Figure 8 It is a schematic diagram of a surge discharge path of the power supply device in the differential mode in the embodiments of the present disclosure. Combining Figure 2 and Figure 8 , in the differential mode, when the surge current direction generated by the surge generator 20 is the positive surge current, the surge current flows out from the first end of the surge generator 20, and after passing through nodes A - B - C - D - E in sequence, it returns to the second end of the surge generator 20.

[0076] Figure 9 It is a schematic diagram of another surge discharge path of the power supply device in the differential mode in the embodiments of the present disclosure. Combining Figure 2 and Figure 9 , in the differential mode, when the surge current direction generated by the surge generator 20 is the negative surge current, the surge current flows out from the second end of the surge generator 20, and after passing through nodes E - A in sequence, it returns to the first end of the surge generator 20.

[0077] Figure 10 It is a schematic diagram of a surge discharge path of the power supply device in the common mode in the embodiments of the present disclosure. Combining Figure 3 and Figure 10 , in the common mode, when the surge current direction generated by the surge generator 20 is the positive surge current, the surge current flows out from the first end of the surge generator 20, and after passing through nodes A - B′ - F in sequence, it flows into the ground.

[0078] Figure 11 This is a schematic diagram of another surge discharge path of the power supply device in the common mode according to the embodiments of the present disclosure. Combining Figure 3 and Figure 11 , in the common-mode fiber optic power supply device, when the direction of the surge current generated by the surge generator 20 is a negative surge current, the surge current flows out from the second end of the surge generator 20, and flows into the ground after passing through nodes E - A - B' - F in sequence.

[0079] In the differential mode, although the discharge paths of the positive surge current and the negative surge current are different, they both return to the surge generator, that is, the surge current is discharged to the surge generator. In the common mode, although the discharge paths of the positive surge current and the negative surge current are different, they are both discharged to the ground.

[0080] Figure 12 This is a schematic diagram of the surge discharge path of a power receiving device provided by the embodiments of the present disclosure. Combining Figure 7 and Figure 12 , when the direction of the surge current generated by the surge generator 20 is a positive surge current, the surge current flows out from the second end of the surge generator 20, and returns to the first end of the surge generator after passing through nodes H - I in sequence.

[0081] Figure 13 This is a schematic diagram of another surge discharge path of a power receiving device provided by the embodiments of the present disclosure. Combining Figure 7 and Figure 13 , when the direction of the surge current generated by the surge generator 20 is a negative surge current, the surge current flows out from the first end of the surge generator 20, and returns to the second end of the surge generator after passing through nodes I - H in sequence.

[0082] In the power receiving device, the discharge paths of the positive surge current and the negative surge current are the same, but the directions are different.

[0083] In some embodiments, the surge protection circuit can also optimize surge protection in combination with software. For example, in the PSE chip, by setting the value of the overvoltage protection register through software to adapt to different cable specifications and application scenarios, the damage to the PSE chip caused by surges can be reduced.

[0084] In this embodiment, the voltages between lines and between line and ground are not limited. For example, in the power supply device and the power receiving device, the voltage between lines in the common mode can be ±2 kV, and the voltage between line and ground in the differential mode is ±4 kV.

[0085] The surge protection circuits provided by the embodiments of the present disclosure all have only one-level protection, reducing electronic components, lowering costs, and improving integration. Moreover, different discharge paths are selected for the positive surge current and the negative surge current, which can accelerate the discharge speed of the surge current, making the surge protection more effective and comprehensive.

[0086] In a second aspect, an embodiment of the present disclosure provides an optical and electrical remote power supply device.

[0087] Figure 14 It is a schematic structural diagram of an optical and electrical remote power supply device provided by an embodiment of the present disclosure. As Figure 14 shown, the optical and electrical remote power supply device provided by the embodiment of the present disclosure includes:

[0088] A network device 1401 for transmitting data and supplying power.

[0089] A port surge protection circuit 1402, which is electrically connected to the power supply device of the network device to reduce the surge current flowing into the network device. The port surge protection circuit includes the port surge protection circuit provided by the embodiment of the present disclosure.

[0090] In some embodiments, the network device includes one or more of a camera, a router, a gateway, and a switch.

[0091] In the optical and electrical remote power supply device provided by the embodiment of the present disclosure, the discharge switch module in the port surge protection circuit is used to select the discharge path for discharging the surge current, so as to quickly discharge the surge current through a low-impedance current-carrying path, reduce the surge current flowing through the chip, and reduce the impact of the surge on the chip, thereby improving the surge protection ability of the chip and further improving the surge protection ability of the optical and electrical remote power supply device.

[0092] The present disclosure has disclosed exemplary embodiments, and although specific terms are used, they are only used and should only be construed as having a general illustrative meaning and not for the purpose of limitation. In some instances, it will be apparent to those skilled in the art that, unless otherwise expressly stated, features, characteristics, and / or elements described in connection with a particular embodiment may be used alone or in combination with features, characteristics, and / or elements described in connection with other embodiments. Accordingly, those skilled in the art will understand that various forms and details may be changed without departing from the scope of the present disclosure as set forth by the appended claims.

Claims

1. A port surge protection circuit, comprising: A discharge switch module, configured to select a discharge path for discharging a surge current according to the direction of the surge current and the signal mode, so as to reduce the surge current flowing through the chip, and the signal mode includes a common mode and a differential mode.

2. The port surge protection circuit according to claim 1, wherein, The discharge switch module includes: A protection module, which is arranged in parallel with the chip, and the impedance of the protection module changes with the volt-ampere characteristic.

3. The port surge protection circuit according to claim 2, wherein The protection module includes: At least one first unidirectional unit, a first end of the first unidirectional unit is electrically connected to a first end of the chip and a first end of a surge generator, and a second end of the first unidirectional unit is electrically connected to a second end of the chip.

4. The port surge protection circuit according to claim 3, wherein, The first unidirectional unit includes a transient voltage suppression diode, or the first unidirectional unit includes the transient voltage suppression diode and a varistor, and the transient voltage suppression diode and the varistor are arranged in parallel.

5. The port surge protection circuit according to claim 2, wherein The chip includes a power supply device chip; the discharge switch module further includes: A first unidirectional switch, which is arranged at the front stage of the protection module and the power supply device chip, and the first unidirectional switch is used to determine the direction of the surge current; the surge current flows from a first end of the first unidirectional switch to a second end; A first control unit, configured to guide the discharge path.

6. The port surge protection circuit according to claim 5, wherein, The first unidirectional switch includes a diode, a first end of the diode is electrically connected to a first end of the surge generator, and a second end of the diode is electrically connected to a first end of the power supply device chip.

7. The port surge protection circuit according to claim 5, wherein, When the signal mode includes the differential mode, the first control unit includes: At least one group of first switch components, a first end of the first switch component is electrically connected to a first end of the surge generator, a second end of the first switch component is electrically connected to a second end of the power supply device chip, a third end of the first switch component is electrically connected to a third end of the power supply device chip, and a fourth end of the first switch component is electrically connected to a second end of the surge generator.

8. The port surge protection circuit according to claim 5, wherein, When the signal mode includes the common mode, the first control unit includes: At least one group of first switch components, a first end of the first switch component is electrically connected to a first end of the surge generator, a second end of the first switch component is electrically connected to a second end of the power supply device chip, a third end of the first switch component is electrically connected to a third end of the power supply device chip, and a fourth end of the first switch component is electrically connected to a second end of the surge generator; And at least one group of second switch components, a first end of the second switch component is electrically connected to a first end of the surge generator, and a second end of the second switch component is grounded.

9. The port surge protection circuit according to claim 7 or 8, wherein, The first switch component includes: A second unidirectional switch, a first end of the second unidirectional switch is electrically connected to a second end of the surge generator, and a second end of the second unidirectional switch is electrically connected to a second end of the power supply device chip; A third unidirectional switch, a first end of the third unidirectional switch is electrically connected to a second end of the surge generator, and a second end of the third unidirectional switch is electrically connected to a first end of the surge generator; A fourth unidirectional switch, a first end of the fourth unidirectional switch is electrically connected to a third end of the power supply device chip, and a second end of the fourth unidirectional switch is electrically connected to a second end of the surge generator; For the second unidirectional switch, the third unidirectional switch, and the fourth unidirectional switch, the surge current flows from the first end to the second end.

10. The port surge protection circuit according to claim 9, wherein, The second unidirectional switch, the third unidirectional switch, and the fourth unidirectional switch each include one or more of a diode or a MOS transistor.

11. The port surge protection circuit according to claim 8, wherein The second switch assembly includes: At least one second unidirectional unit arranged in parallel, a first end of the second unidirectional unit is electrically connected to a first end of the surge generator, and a second end of the second unidirectional unit is grounded.

12. The port surge protection circuit according to claim 11, wherein, The second unidirectional unit is one or more of a transient voltage suppression diode and a varistor.

13. The port surge protection circuit according to claim 5, wherein, The discharge switch module further includes: At least one first inductor, a first end of the first inductor is electrically connected to a first end of the surge generator, and a second end of the first inductor is electrically connected to a first end of the first unidirectional switch; At least one second inductor, a first end of the second inductor is electrically connected to a second end of the power supply device chip, and a second end of the second inductor is electrically connected to a second end of the surge generator.

14. An optical power remote feeding device, comprising: A network device for transmitting data and supplying power; A port surge protection circuit, the port surge protection circuit is electrically connected to a power supply device of the network device to reduce the surge current flowing into the network device, and the port surge protection circuit includes the port surge protection circuit according to any one of claims 1 to 13.

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