10 gigabit bit Ethernet lightning stroke protection isolation transformer

Abstract

The utility model discloses a 10 gigabit Ethernet lightning stroke protection isolation transformer. The 10 gigabit Ethernet lightning stroke protection isolation transformer comprises a packaging part; the substrate is arranged on the inner side of the packaging part, the substrate comprises a plurality of channels and at least one real grounding circuit, each channel comprises a common-mode noise suppression coil and an isolation transformer, an overvoltage protection unit is arranged between a center tap port of the isolation transformer and the real grounding circuit, and the overvoltage protection unit comprises an overvoltage protection circuit and an overvoltage protection circuit. And the input loss of the channel is not more than 1.5 dB when the frequency is 1 to 200 MHz, is not more than 2.0 db when the frequency is 200 to 400 MHz, and is not more than 3.0 db when the frequency is 400 to 500 MHz. According to the utility model, the anti-interference capability and lightning protection performance of the 10 gigabit Ethernet can be effectively improved, more stable and reliable high-speed transmission quality is provided, and the requirements of modern communication equipment for high efficiency and high reliability are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to an isolation transformer, in particular to a 10-gigabit Ethernet network lightning protection isolation transformer. BACKGROUND

[0002] Isolation transformers are used to provide electrical isolation during signal or power transmission, and its main function is to make the input end and the output end have no direct conduction path through electromagnetic induction, so as to improve system safety and suppress common-mode interference. Such transformers are widely used in Ethernet networks, industrial communication and power systems, etc. to prevent high voltage or noise interference from being conducted to sensitive circuits. However, in actual application, the isolation transformer may still cause high-frequency surge energy (such as lightning surge) to be transmitted to the secondary end through capacitive coupling due to the existence of parasitic capacitance between windings, thereby causing damage to the rear-end circuit.

[0003] In addition, if the lightning energy is too large, it may also cause the insulation layer of the transformer to break down, causing isolation failure and further causing systematic failure. Therefore, in order to improve the lightning protection performance, an overvoltage protection element such as a transient voltage suppressor (TVS), a gas discharge tube (GDT) or a varistor (MOV) is usually arranged between the center tap of the isolation transformer and the ground terminal to quickly conduct and release energy when lightning occurs, so as to avoid the surge from being further coupled to the signal end, and to ensure the overall stability and reliability of the system. SUMMARY

[0004] The main purpose of the utility model is to provide a 10-gigabit Ethernet network lightning protection isolation transformer, which comprises a packaging part and a substrate. The substrate is arranged inside the packaging part, and the substrate comprises a plurality of channels and at least one real ground line, each channel comprising a common-mode noise suppression coil and an isolation transformer. An overvoltage protection unit is arranged between the center tap port of the isolation transformer and the real ground line, wherein the input loss of the channel is not more than 1.5 dB at 1-200 MHz, not more than 2.0 dB at 200-400 MHz, and not more than 3.0 dB at 400-500 MHz.

[0005] Further, the common-mode noise suppression coil of the channel is arranged between the primary side of the isolation transformer and the input.

[0006] Further, the common-mode noise suppression coil of the channel is arranged between the secondary side of the isolation transformer and the output.

[0007] Further, the common-mode noise suppression coil of the channel is arranged between the secondary side of the isolation transformer and the output.

[0008] Further, the overvoltage protection unit is a metal oxide varistor (MOV) or a thyristor surge protection device (TSPD).

[0009] Further, a surge suppression unit is arranged between the two primary-side inputs.

[0010] Further, a surge suppression unit is arranged between the two secondary-side outputs.

[0011] Further, the surge suppression unit is a transient voltage suppression diode (TVS).

[0012] Further, the parasitic capacitance of the isolation transformer is not more than 0.5 pF.

[0013] Further, the return loss of the channel is not more than 17 dB at 1-100 MHz, not more than 13 dB at 100-250 MHz, and not more than 10 dB at 250-400 MHz.

[0014] Therefore, the utility model can effectively improve the anti-interference ability and lightning protection performance of a 10-gigabit Ethernet network, provide more stable and reliable high-speed transmission quality, and meet the demand of modern communication equipment for high efficiency and high reliability. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 Fig. 1 is a schematic diagram of the appearance of an Ethernet network lightning protection isolation transformer according to the utility model.

[0016] Figure 2 Fig. 2 is a schematic diagram of the circuit of an Ethernet network lightning protection isolation transformer according to the utility model.

[0017] Figure 3 Fig. 3 is a schematic diagram of the configuration of elements on a substrate in a first embodiment of the utility model.

[0018] Figure 4 Fig. 4 is a schematic diagram of the configuration of elements on a substrate in a second embodiment of the utility model.

[0019] The following are indicated in the figures:

[0020] 100 Ethernet network lightning protection isolation transformer

[0021] 10 packaging portion

[0022] 11 lower base

[0023] 12 upper cover

[0024] 20 substrate

[0025] CH channel

[0026] GND real ground line

[0027] C1 common mode noise suppression coil

[0028] C2 isolation transformer

[0029] C21 primary side

[0030] C211 central tap port

[0031] C22 secondary side

[0032] C221 central tap port

[0033] IN input

[0034] OP output

[0035] T1 overvoltage protection unit

[0036] T2 surge suppression unit

[0037] T11 metal oxide varistor

[0038] T12 thyristor surge protection element

[0039] T21 transient voltage suppression diode

[0040] T22 surge suppression wafer DETAILED DESCRIPTION

[0041] Detailed description and technical content of the present application will be described as follows in conjunction with the accompanying drawings. The drawings in the present application are not necessarily drawn according to the actual proportions for the convenience of description, and the drawings and their proportions are not used to limit the scope of the present application.

[0042] In the present application, "one side" can be specifically on the upper side, lower side, left side, right side, front side, back side of the corresponding object, or be disposed on any adjacent position of the object, or be directly or indirectly connected to the object, etc., but the present application is not limited thereto.

[0043] In some embodiments of the present disclosure, the terms such as "disposed", "connected", and the like, unless specifically defined, can mean that two components are in direct contact, or can also mean that two components are not in direct contact, with additional components located between the two structures. The terms such as "disposed" and "connected" can also include the case where both structures are movable, or the case where both structures are fixed.

[0044] In addition, the terms "first", "second", and similar rela¬tive expressions noted in the description and claims of the present disclosure are used to distinguish different components or to distinguish different embodiments or aspects and are not intended to limit the upper or lower limit of the number of components or to limit the order of manufacture or arrangement of components.

[0045] Directional phrases used herein, such as, for example, "upper", "lower", "left", "right", and the like, are made with reference to the orientation of the figures. The directional phrases used are therefore used for illustration and not limitation of the present disclosure.

[0046] Please refer to Figure 1 The embodiment of the present application provides a 10 gigabit Ethernet lightning protection isolation transformer 100, which comprises a packaging part 10 and a substrate 20. The substrate 20 is arranged inside the packaging part 10 to isolate the substrate 20 from the outside through the packaging part 10. The "10 gigabit Ethernet" refers to the Ethernet standard with a network transmission speed of 10 Gbps (10 Gigabits per second), which can also be abbreviated as 10GbE or 10G Ethernet.

[0047] Next, please refer to Figure 2 The circuit schematic diagram of the Ethernet lightning protection isolation transformer in the present application is shown. The substrate 20 comprises a plurality of channels CH and at least one real ground line GND. The substrate 20 disclosed in the present embodiment comprises four groups of channels (hereinafter referred to as channels CH) for corresponding to existing specification settings (such as 10GBASE-T or traditional 1GbE specifications). However, the number of these channels CH is only for the existing specification configuration, and when the existing specification changes, the number of these channels will also change. The change in the number of these channels is not limited in the present application.

[0048] Each channel CH is provided with a common mode noise suppression coil C1 and an isolation transformer C2. The isolation transformer C2 is mainly used for providing electrical isolation, signal coupling, noise suppression and impedance matching. In the embodiment, the common mode noise suppression coil C1 is arranged between the primary side C21 of the isolation transformer C2 and the input IN. The common mode noise suppression coil C1 is used to suppress common mode noise or common mode interference (EMI-Electromagnetic Interference) to improve the anti-interference ability (EMC) and signal quality (Signal Integrity) of the electronic device. In another embodiment, the common mode noise suppression coil C1 is arranged between the secondary side C22 of the isolation transformer C2 and the output OP, and the variations of these embodiments are not limited in the utility model.

[0049] Specifically, when the common mode noise suppression coil C1 is arranged at the primary side C21 of the isolation transformer C2, the main purpose is to suppress the common mode interference from the outside, prevent noise from entering the system circuit through the connection end, and help improve the overall anti-interference ability (EMI Immunity). The common mode noise suppression coil C1 is arranged at the secondary side C22 of the isolation transformer C2, mainly used to suppress the common mode noise generated inside the system, avoid noise from being radiated to the external space through the signal or power line, affect the normal operation of other equipment, and thus improve the electromagnetic compatibility (EMC Performance) of the system. As for the effect of suppressing surges, it is better to be arranged at the primary side. When surges enter the system from the outside (such as lightning induction, electrostatic discharge, power line coupling), the common mode noise suppression coil C1 at the primary side can immediately provide a high impedance path before the surge enters, suppress the passage of common mode surges, and effectively reduce the chance of damage caused by surges entering the IC circuit.

[0050] To provide lightning and surge protection effect, the central tap port C211 of the primary side C21 of the isolation transformer C2 and the real ground line GND are configured with an overvoltage protection unit T1. In another embodiment, the overvoltage protection unit T1 can also be arranged between the central tap port C221 of the secondary side C22 of the isolation transformer C2 and the real ground line GND. The variations of these embodiments are not limited in the utility model. In an embodiment, the overvoltage protection unit T1 may, for example, but is not limited to, a metal oxide varistor (Metal Oxide Varistor, MOV) or a thyristor surge protection device (Thyristor Surge Protection Device, TSPD). In a preferred embodiment, the overvoltage protection unit T1 adopts a metal oxide varistor.

[0051] In an embodiment, a surge suppression unit T2 can be further arranged between the two outputs OP of the secondary side C22 of the isolation transformer C2, so as to effectively avoid the surge energy from directly entering the backend equipment and causing damage. In another embodiment, the surge suppression unit T2 can be arranged between the two inputs IN of the primary side C21 of the isolation transformer C2, which is not limited in the utility model. In an embodiment, the surge suppression unit T2 can be, but is not limited to, a transient voltage suppression diode (TVS Diode) or other similar surge suppression devices.

[0052] The Ethernet lightning protection isolation transformer 100 of the utility model meets the following standards for the input loss of a single channel CH: no more than 1.5 dB in the 1MHz to 200MHz frequency band; no more than 2.0 dB in the 200MHz to 400MHz frequency band; and no more than 3.0 dB in the 400MHz to 500MHz frequency band. In terms of return loss, the return loss of the channel in the 1MHz to 100MHz frequency band is no more than 17 dB, the return loss in the 100MHz to 250MHz frequency band is no more than 13 dB, and the return loss in the 250MHz to 400MHz frequency band is no more than 10 dB, which meets the high-frequency communication demand. In an embodiment, the isolation transformer used in the channel is designed to have a parasitic capacitance of no more than 0.5pF, thereby reducing noise interference and improving communication quality.

[0053] In terms of structural configuration, in an embodiment, the Ethernet lightning protection isolation transformer 100 of the utility model is made of three layers of stacked structures, i.e., a lower base 11 and an upper cover 12 forming the packaging portion 10, and a substrate 20 arranged between the lower base 11 and the upper cover 12. The lower base 11 is provided with a receiving space for receiving the isolation transformer C2 and the common-mode noise suppression coil C1; the substrate 20 is covered on the lower base 11 to isolate the isolation transformer C2 and the common-mode noise suppression coil C1 from the overvoltage protection unit T1 and the surge suppression unit T2 on the upper side of the substrate 20 to reduce interference. The following describes two different embodiments of the configuration on the substrate 20.

[0054] In an embodiment, please refer to Figure 3 , which is a schematic diagram of the configuration of the elements on the substrate in the first embodiment of the utility model. In the first embodiment, four groups of metal oxide varistors T11 are arranged on the upper side (close to the upper side of the drawing) of the substrate 20, corresponding to (arranged in) four different channels CH, and are respectively arranged between the central tap port C221 of the secondary side C22 of the channel CH isolation transformer C2 and the actual ground circuit GND. Four groups of transient voltage suppression diodes T21 are arranged on the upper side (close to the lower side of the drawing) of the substrate 20, corresponding to (arranged in) four different channels CH, and are respectively arranged between the two inputs IN of the primary side C21 of the channel CH isolation transformer C2.

[0055] In another embodiment, please refer to Figure 4 , the second embodiment of the utility model configuration diagram of component on the substrate. In the second embodiment, the upper side of the substrate 20 (close to the upper side of the figure) is configured with two groups of surge suppression chip T22, each of the surge suppression chip T22 includes two transient voltage suppression diode, a total of four groups of transient voltage suppression diode, respectively corresponding to (configured in) four groups of different channels CH, and is respectively arranged between the two inputs IN of the primary side C21 of the channel CH isolation transformer C2. The upper side of the substrate 20 (close to the lower side of the figure) is configured with four groups of thyristor surge protection elements T12 respectively corresponding to (configured in) four groups of different channels, and is respectively arranged between the central tap port C221 of the secondary side C22 of the channel CH isolation transformer C2 and the real ground circuit GND, the thyristor surge protection element can also be replaced by metal oxide varistor.

[0056] In summary, through the embodiment of the utility model, the anti-interference ability and lightning protection performance of 10 gigabit Ethernet can be effectively improved, more stable and reliable high-speed transmission quality is provided, and the demand of modern communication equipment for high efficiency and high reliability is met. In addition, the transmission rate can reach 10 gigabit Ethernet, which can meet the 10 gigabit Ethernet transmission standard. Further, the product integrates lightning protection capability (protection parts), which can meet the specification of IEC-61000-4-5: Differential Mode: ±2KV Common Mode: ±6KV. Furthermore, the utility model is a single part, which integrates traditional network transformer and lightning protection parts, reduces the design difficulty and the problem of small space.

[0057] The utility model has been described in detail above, and the above is only one preferred embodiment of the utility model, which cannot limit the scope of the utility model implementation, that is, any equivalent change and modification made according to the patent range of the utility model should still belong to the patent coverage range of the utility model.

Claims

1. A 10 Gigabit Ethernet lightning strike protection isolation transformer, characterized in that, include: Packaging Department; as well as A substrate is disposed inside the package portion. The substrate includes multiple channels and at least one ground line. Each channel includes a common-mode noise suppression coil and an isolation transformer. An overvoltage protection unit is provided between the central tap of the isolation transformer and the ground line. The input loss of the channel does not exceed 1.5dB in the range of 1~200MHz, does not exceed 2.0dB in the range of 200MHz~400MHz, and does not exceed 3.0dB in the range of 400MHz~500MHz.

2. The 10 Gigabit Ethernet lightning strike protection isolation transformer according to claim 1, characterized in that, The common-mode noise suppression coil of the channel is located between the primary side and the input of the isolation transformer.

3. The 10 Gigabit Ethernet lightning strike protection isolation transformer according to claim 1, characterized in that, The common-mode noise suppression coil of the channel is located between the secondary side and the output of the isolation transformer.

4. The 10 Gigabit Ethernet lightning strike protection isolation transformer according to claim 1, characterized in that, The overvoltage protection unit is a metal oxide varistor or a thyristor surge protection element.

5. The 10 Gigabit Ethernet lightning strike protection isolation transformer according to claim 1, characterized in that, A surge suppression unit is provided between the two inputs on the primary side of the isolation transformer.

6. The 10 Gigabit Ethernet lightning strike protection isolation transformer according to claim 1, characterized in that, A surge suppression unit is provided between the two outputs on the secondary side of the isolation transformer.

7. The 10 Gigabit Ethernet lightning strike protection isolation transformer according to claim 5 or 6, characterized in that, The surge suppression unit is a transient voltage suppression diode.

8. The 10 Gigabit Ethernet lightning strike protection isolation transformer according to claim 1, characterized in that, The parasitic capacitance of the isolation transformer does not exceed 0.5pF.

9. The 10 Gigabit Ethernet lightning strike protection isolation transformer according to claim 1, characterized in that, The return loss of the channel shall not exceed 17dB in the range of 1~100MHz, not exceed 13dB in the range of 100MHz~250MHz, and not exceed 10dB in the range of 250MHz~400MHz.

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