TWM641974U - High performance inductive network transformer module with integrated network circuit - Google Patents

Abstract

A high-performance inductive network transformer module with an integrated network circuit, which includes: a circuit board; a transformer component set on the circuit board; at least one peripheral circuit set on the circuit board and located on the one side of the transformer component; and a casing covering the circuit board and wrapping the transformer component and the at least one peripheral circuit. In this case, the transformer component and the at least one peripheral circuit are mounted on the circuit board by Surface Mount Technology (SMT), and the casing is covered on the circuit board to cover the transformer component and the At least one peripheral circuit improves the complexity and inconvenience of manual work in the past, can reduce costs and improve production efficiency, and by integrating the at least one peripheral circuit into the housing, such as transient voltage suppression (Transient Voltage Suppressors, TVS) The diode is used to improve the electric shock resistance of the network transformer, and because the at least one peripheral circuit is integrated into the housing, it is beneficial to the miniaturization of the product.

Description

High performance inductive network transformer module with integrated network circuit

This creation is about a network transformer, especially a high-performance inductive network transformer module with an integrated network circuit.

Network transformers can also be called network isolation transformers. Network transformers are mainly used to provide impedance matching and isolation abnormalities. For example, when the impedances of the computer devices (or network devices) connected at both ends of the network line are different, the number of turns of the network transformer can be adjusted so that the devices connected at both ends of the network line can achieve impedance matching. In the Ethernet network, a network transformer is often used between the PHY (Port Physical Layer) chip and the RJ45 connector. The network transformer is used to enhance the signal and make the transmission distance longer. The network transformer can also isolate the PHY chip from the outside to enhance the anti-interference ability, and can cooperate with the transient voltage suppression (Transient Voltage Suppressors, TVS) diode to improve the anti-lightning ability. The TVS diode can prevent lightning caused by lightning surge.

Known network transformers can be divided into inductive type and capacitive type in terms of internal components. The main difference between the two lies in the presence or absence of capacitive components. Taking a network transformer as an example, components such as the transformer (Transformer) and the common mode filter (Common Mode) are placed on the same circuit board and covered with a case, so that the overall appearance forms a module like a single component ( The appearance is modular). Taking capacitive network transformers as an example, components such as transformers, common-mode filters, and capacitors are placed on the same circuit board And it is covered with a shell, so that the overall appearance forms a module like a single component.

Network transformers with traditional manufacturing processes, such as a "transformer for network communication" in the Republic of China Patent No. M325594 and a "pin structure of electronic components for signal transmission" in the Republic of China Patent No. I263421. Please refer to Figure 1 of case No. M325594, which sets coil-type (Coil) transformer components (meaning components such as transformers and common-mode filters) on the circuit board, and manually installs the transformer components The lead wires are tied to the pins, please refer to the first figure of the I263421 case. After the binding is completed, the lead wires are welded and combined with the inner terminals of the pins by manually using a welding gun and solder. Finally, the casing is covered on the circuit board to cover the transformer assembly.

Traditional network transformers are complex and labor-intensive, and cannot be automated using Surface Mount Technology (SMT). Generally speaking, the process of surface mount soldering technology is as follows. First, use a solder paste printing machine to print solder paste on the position where electronic components need to be installed on the circuit board, and then use a chip mounter to place the electronic components on the circuit board. The position where the solder paste is printed is finally heated in a reflow furnace to melt the solder paste on the circuit board, so that the electronic components and the circuit board are connected and fixed. However, in the traditional manufacturing process, the transformer assembly can only be soldered to the circuit board manually, and then the casing is covered on the circuit board to cover the transformer assembly, and then the peripheral circuits can be placed on the circuit board outside the casing. superior.

Please refer to FIG. 1 and FIG. 2, which are internal and external schematic diagrams of conventional network transformers. As shown in FIG. 1, the housing 110 (indicated by dashed lines) includes a transformer 120 and a common-mode filter 130 (indicated by an equivalent circuit) , and the PHY terminal A is connected to the capacitor 210 and then grounded, and the RJ terminal B is connected to the resistor 220 and the high voltage capacitor 230 and then grounded. As shown in Figure 2, the housing 110 (indicated by a dotted line) contains a transformer 120 and a common-mode filter 130 (indicated by an equivalent circuit), and the PHY terminal A is connected to a capacitor 210 and then grounded, and the differential line is connected to Connect to TVS diode 240, connect RJ terminal B to resistor 220 and high-voltage capacitor 230 and then ground (the above are all located outside the casing 110).

The following problems and deficiencies in the traditional manufacturing process have yet to be improved: First, the size of the circuit board must be larger than the housing to install peripheral circuits such as capacitors, resistors, high-voltage capacitors, or TVS diodes, which is not conducive to miniaturization. Second, the manual method has low efficiency, high error rate, and high cost.

Therefore, how to eliminate the above-mentioned deficiencies is the technical difficulty that the author of this case wants to solve.

In view of the idiomatic description, this creation aims to solve and improve the existing problems and deficiencies in the idiom.

In order to achieve the above purpose, this invention provides a high-performance inductive network transformer module with integrated network circuit, which includes: a circuit board; a transformer component, located on the circuit board; at least one peripheral circuit, It is arranged on the circuit board and is located on one side of the transformer component; and a shell is covered on the circuit board and wraps the transformer component and the at least one peripheral circuit.

Wherein, the transformer component includes a wafer-type transformer.

Wherein, the transformer component includes a common mode filter.

Wherein, the at least one peripheral circuit is a capacitor, a resistor, a high voltage capacitor or a TVS diode.

In this case, the transformer component and the at least one peripheral circuit are installed on the circuit board by SMT, and the casing is covered on the circuit board to cover the transformer component and the at least one peripheral circuit. Peripheral circuits improve the complexity and inconvenience of manual operations in the past, reduce costs and improve production efficiency, and integrate at least one peripheral circuit into the housing, such as TVS diodes, to improve the electric shock resistance of the network transformer , and because the at least one peripheral circuit is integrated into the casing, it is beneficial to product miniaturization.

〔Known technology〕

110: shell

120: Transformer

130: Common mode filter

210: capacitance

220: resistance

230: high voltage capacitor

240: TVS diode

A: PHY side

B: RJ end

[this creation]

1: circuit board

2: Transformer components

21:Transformer

22: Common mode filter

3: at least one peripheral circuit

31: capacitance

32: resistance

33: High voltage capacitor

34: TVS diode

35: Current limiting resistor

36: TVS diode

4: shell

A: PHY side

B: RJ end

[FIG. 1] is the first schematic diagram of a conventional network transformer module.

[FIG. 2] is the second schematic diagram of a conventional network transformer module.

[Figure 3] is the external schematic diagram of this creation.

[Figure 4] is the internal schematic diagram of this creation.

[Fig. 5] is the schematic diagram of the first embodiment of this creation.

[Fig. 6] is the schematic diagram of the second embodiment of this creation.

[Fig. 7] is the schematic diagram of the third embodiment of the invention.

[Fig. 8] is a schematic diagram of the fourth embodiment of the invention.

[Fig. 9] is a schematic diagram of the fifth embodiment of the invention.

[Fig. 10] is a schematic diagram of the sixth embodiment of the invention.

[Fig. 11] is a schematic diagram of the seventh embodiment of the invention.

[Fig. 12] is the schematic diagram of the eighth embodiment of this creation.

In order to make it easier for your examiner to understand the other features, content and advantages of this creation and the effects achieved by it to be more apparent, this creation is attached to the attached drawings, and the details are as follows:

Please refer to Fig. 3 and Fig. 4, this invention provides a kind of integrated network circuit The high-performance inductive network transformer module includes: a circuit board 1 , a transformer component 2 , at least one peripheral circuit 3 and a casing 4 .

The circuit board 1 can be a single-layer board, a double-layer board or a multi-layer board according to product or design requirements. Moreover, when the circuit board 1 is a double-layer board or a multi-layer board, a through hole (via) is provided, and the through hole can connect lines (including contacts) of different layers to each other, but this part belongs to a general PCB circuit board. The basic structure and common knowledge of , will not be described in detail here.

The transformer assembly 2 may include a chip-type transformer 21 and a common-mode filter 22 . The transformer component 2 can be welded on the circuit board 1 by using surface mount technology (Surface Mount Technology, SMT) and other processes.

The at least one peripheral circuit 3 can be a capacitor 31, a resistor 32, a high voltage capacitor 33 or a transient voltage suppression (Transient Voltage Suppressors, TVS) diode 34, or other over-current protection components, over-voltage protection components , but not limited to this.

The casing 4 covers the circuit board 1 and wraps the transformer assembly 2 and the at least one peripheral circuit 3 . The casing 4 can be a hollow structure with one end open, and can be rectangular or square to accommodate the transformer assembly 2 and the at least one peripheral circuit 3 .

Please refer to Figures 5 to 12, this creation provides several feasible embodiments, which are described as follows:

First embodiment:

As shown in FIG. 5 , the casing 4 (indicated by a dotted line) includes the transformer 21 , the common-mode filter 22 , the capacitor 31 , the resistor 32 and the high-voltage capacitor 33 . Moreover, the PHY terminal A is connected to the capacitor 31 and then grounded; the RJ terminal B is connected to the resistor 32 and the high voltage capacitor 33 and then grounded (all of which are located inside the casing 4 ). The resistor 32 is connected to the high-voltage capacitor 33 to form a Bob Simth circuit, which can reach the signal impedance Matching has the effect of suppressing external interference. To put it simply, a wire (namely, PHY terminal A) is drawn from the center of the coil on the primary side of the transformer 21 to connect to the capacitor 31 and then grounded, and it is called the PHY terminal because it is close to the PHY chip (the PHY chip is not shown in the figure); Similarly, pull out a section of wire (that is, RJ terminal B) from the coil center of the secondary side of the transformer 21 to connect the resistor 32 and the high-voltage capacitor 33 to ground, and because it is close to the RJ45 connector (the RJ45 connector is not shown in the figure) So it is called RJ end.

Second embodiment:

As shown in FIG. 6 , the casing 4 (indicated by a dotted line) includes the transformer 21 , the common-mode filter 22 , the capacitor 31 , the resistor 32 , the high-voltage capacitor 33 and the TVS diode 34 . Moreover, the PHY terminal A is connected to the capacitor 31 and then grounded, and the PHY terminal differential line is connected to the TVS diode 34 and then grounded; the RJ terminal B is connected to the resistor 32 and the high-voltage capacitor 33 and then grounded (the above are located inside the casing 4) . Note: Differential lines are used for anti-interference, and the TVS diode 34 can prevent surges caused by lightning strikes.

Third embodiment:

As shown in Figure 7, the housing 4 (indicated by a dotted line) includes the transformer 21, the common mode filter 22, the capacitor 31, the resistor 32, the high voltage capacitor 33, the TVS diode 34 and a current limiting resistor 35 . Moreover, the PHY terminal A is connected to the capacitor 31 and then grounded, the PHY terminal differential line is connected to the TVS diode 34 and then grounded, and the PHY terminal differential line is also connected to the current limiting resistor 35; the RJ terminal B is connected to the resistor 32 and the high voltage capacitor 33 Then ground (the above are all located inside the housing 4).

Fourth embodiment:

As shown in Figure 8, the housing 4 (indicated by dashed lines) includes the transformer 21, the common mode filter 22, the capacitor 31, the resistor 32, the high voltage capacitor 33, the TVS diodes 34, 36 and a current limiting Resistor 35. Moreover, the PHY terminal A is connected to the capacitor 31 and then grounded, the PHY terminal differential line is connected to the TVS diode 34 and then grounded, the PHY terminal differential line is also connected to the current limiting resistor 35; the RJ terminal B is connected to the resistor 32 And the high-voltage capacitor 33 is grounded again, and the RJ terminal differential line is connected to the TVS diode 36 (the above are all located inside the casing 4).

Fifth embodiment:

As shown in FIG. 9 , the casing 4 (indicated by a dotted line) includes the transformer 21 , the common-mode filter 22 , the capacitor 31 , the resistor 32 and the high-voltage capacitor 33 . Moreover, the PHY terminal A is connected to the capacitor 31 (shared with the capacitor 31 ) and then grounded; the RJ terminal B is connected to the resistor 32 and the high-voltage capacitor 33 and then grounded (all of which are located inside the housing 4 ). The fifth embodiment is an extended application of the first embodiment. The difference between the two is that the first embodiment does not share the capacitor 31 (shown in FIG. 5 ), while the fifth embodiment shares the capacitor 31 .

Sixth embodiment:

As shown in FIG. 10 , the casing 4 (indicated by a dotted line) includes the transformer 21 , the common-mode filter 22 , the capacitor 31 , the resistor 32 , the high-voltage capacitor 33 and the TVS diode 34 . Moreover, the PHY terminal A is connected to the capacitor 31 (shared with the capacitor 31) and then grounded, and the PHY terminal differential line is connected to the TVS diode 34 and then grounded; the RJ terminal B is connected to the resistor 32 and the high-voltage capacitor 33 and then grounded (the above are located at inside the housing 4).

Seventh embodiment:

Please refer to Fig. 11, the housing 4 (represented by a dotted line) contains the transformer 21, the common mode filter 22 (represented by an equivalent circuit), the capacitor 31, the resistor 32, the high voltage capacitor 33, the TVS Diode 34 and the current limiting resistor 35 . Moreover, the PHY terminal A is connected to the capacitor 31 (shared with the capacitor 31) and then grounded, the PHY terminal differential line is connected to the TVS diode 34 and then grounded, and the PHY terminal differential line is also connected to the current limiting resistor 35; the RJ terminal B is connected to the resistor 32 and the high-voltage capacitor 33 are grounded again (the above are all located inside the casing 4).

Eighth embodiment:

Please refer to Fig. 12, the housing 4 (represented by a dotted line) contains the transformer 21, the common mode filter 22 (represented by an equivalent circuit), the capacitor 31, the resistor 32, the high voltage capacitor 33, the TVS Diodes 34 , 36 and the current limiting resistor 35 . Moreover, the PHY terminal A is connected to the capacitor 31 (shared with the capacitor 31) and then grounded, the PHY terminal differential line is connected to the TVS diode 34 and then grounded, and the PHY terminal differential line is also connected to the current limiting resistor 35; the RJ terminal B is connected to the resistor 32 and the high-voltage capacitor 33 are grounded again, and the RJ end differential line is connected to the TVS diode 36 (the above are all located inside the casing 4).

To sum up, in this case, the transformer assembly 2 and the at least one peripheral circuit 3 are mounted on the circuit board by Surface Mount Technology (SMT), and the housing 4 is covered on the circuit board 1 In order to cover the transformer assembly 2 and the at least one peripheral circuit 3, the complexity and inconvenience of the previous manual operation can be improved, the cost can be reduced and the production efficiency can be improved, and by integrating the at least one peripheral circuit 3 into the casing 4 For example, TVS diodes are used to improve the electric shock resistance of the network transformer, and because the at least one peripheral circuit 3 is integrated into the casing 4, it is beneficial to the miniaturization of the product.

The above discussion is only a preferred embodiment of this creation, and is not used to limit the patent scope of this creation; therefore, any transformation of equivalent shape, structure or combination within the spirit and scope of this creation should be Covered within the patent scope of this creation.

1: circuit board

2: Transformer components

21:Transformer

22: Common mode filter

3: at least one peripheral circuit

31: capacitance

32: resistance

33: High voltage capacitor

34: TVS diode

35: Current limiting resistor

36: TVS diode

Claims (4)

A high-performance inductive network transformer module with integrated network circuits, comprising: a circuit board; A transformer component is arranged on the circuit board; at least one peripheral circuit on the circuit board and on one side of the transformer assembly; and A casing covers the circuit board and wraps the transformer assembly and the at least one peripheral circuit. According to claim 1, the high-performance inductive network transformer module with integrated network circuit, wherein the transformer component includes a chip-type transformer. The high-performance inductive network transformer module with integrated network circuit as described in claim 1, wherein the transformer component includes a common mode filter. The high-performance inductive network transformer module with integrated network circuit as described in claim 1, wherein the at least one peripheral circuit is a capacitor, a resistor, a high-voltage capacitor or a transient voltage suppressor (Transient Voltage Suppressors, TVS ) diode.

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