CN201278411Y - Ethernet connector with lightning protection function - Google Patents
Ethernet connector with lightning protection function Download PDFInfo
- Publication number
- CN201278411Y CN201278411Y CNU2008201326395U CN200820132639U CN201278411Y CN 201278411 Y CN201278411 Y CN 201278411Y CN U2008201326395 U CNU2008201326395 U CN U2008201326395U CN 200820132639 U CN200820132639 U CN 200820132639U CN 201278411 Y CN201278411 Y CN 201278411Y
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- transformer
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- ethernet
- connector
- surge
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Abstract
The utility model discloses an Ethernet connector with lightning protection function, comprising a transformer and a surge discharging element, wherein a center tap at a line side of the transformer is provided with a lightning strike surge discharging passageway which is formed in such a way that the surge discharging element is spanned between the center tap at the line side of the transformer and a ground terminal. By spanning the surge discharging element which can perform lightning strike protection for many times between the center tap at the line side of the transformer and a shielding case body to form the lightning strike surge discharging passageway, the utility model enhances the ability of the connector for resisting lightning strike.
Description
Technical field
The utility model relates to the communications field, relates in particular to a kind of ethernet connector with lightning protection function.
Background technology
Fig. 1 is the schematic diagram of the RJ45 connector of the present integrated Ethernet transformer that adopts, and wherein, T1 is a net mouth transformer, and C1 is a transformer centre cap high frequency earthing electric capacity, and R1, R2, R3 are interface ethernet circuit build-out resistor.Ethernet interface comprises two couples of differential lines (RX+, RX-, TX+, TX-), by transformer T1 and chip side circuit (TX*, RX*) realize common-mode isolation, the ethernet signal that while Ethernet interface chip (not shown) is sent or received is connected with the ethernet line trackside by the differential mode coupling function of transformer T1.The transformer centre tap passes through build-out resistor R1, R2, the corresponding connection with interface of R3, and is connected with earth terminal GND by adding high frequency ground capacity C1, with filter away high frequency noise.
This RJ45 connector does not carry out special lightning Protection Design, and when lightning surge arrived, connector mainly relied on the isolating power of Ethernet transformer T1 to make the Ethernet interface chip avoid the attack of lightning surge; When lightning surge is big slightly, owing to there is not the bleed off approach, understands, thereby cause the lightning protection failure the insulation breakdown of insulation between ethernet line and the ground or isolating transformer.For heavy lightning strike area, a thunderstorm can cause a large amount of Ethernet switches to interrupt and damage especially.
At the problem a little less than the RJ45 connector opposing thunderbolt ability, a kind of solution is that the special Ethernet lightning protection device of series connection is realized lightning Protection on ethernet port.This external lightning protection device adopts gas discharge tube and TVS diode array to cooperate and finishes, and has good lightning protection effect, but that shortcoming is a cost is higher, and it is bigger to take up room, and need install specially; Therefore, the ethernet port product of access layer equipment is often owing to cost and take up room and reason such as mounting cost can not adopt this lightning protection device.
Another kind of way such as Chinese patent CN2760829 put down in writing: in the distance about maintenance 0.35mm-0.5mm between the centre tap of net mouth transformer T1 and the ground; utilize point discharge principle, high-voltage breakdown principle that Ethernet interface induction high pressure is discharged; thereby can well protect network interface not to be struck by lightning; but; the thunder-strike current bleed off passage that this method adopts is set up by point discharge; when meeting with thunderbolt, the easy scaling loss discharge channel of lightning surge electric current and make that protective capability reduced or forfeiture when thunderbolt arrived next time.
In sum, just at present, though the RJ45 connector of external lightning Protection device has good lightning protection effect, the cost height, installation also bigger and need be special takes up room; And between centre tap that makes net mouth transformer T1 and ground, remain in the way of the distance about 0.35mm-0.5mm, the discharge channel of lightning protection ethernet port is easy to again be burnt.
The utility model content
Consider the problems referred to above that exist in the correlation technique and propose the utility model.For this reason, the purpose of this utility model is to provide a kind of ethernet connector with lightning protection function, the problem of being burnt easily with the discharge channel that overcomes the ethernet connector that has lightning surge bleed off passage in the prior art.
The utility model according to the present invention, a kind of ethernet connector with lightning protection function is provided, this connector comprises transformer, and transformer lines side centre cap is provided with lightning surge bleed off path, in the utility model, this connector also comprises surge bleed off device, and above-mentioned lightning surge bleed off path is connected across between transformer lines side centre cap and the earth terminal by surge bleed off device and forms.
Preferably, above-mentioned surge bleed off device is a piezo-resistance.
Perhaps, preferably, surge bleed off device is the little gas discharge tube of stray capacitance, semiconductor discharge tube or TVS diode etc.
Wherein, transformer and surge bleed off device are closed in the shield shell, and shield shell is connected with earth terminal.
By above-mentioned at least one technical scheme of the present utility model, be connected across formation lightning surge bleed off passage between transformer lines side centre cap and the shield shell by the surge bleed off device that can repeatedly carry out lightning Protection, strengthened the ability of connector opposing thunderbolt.
Description of drawings
Accompanying drawing is used to provide further understanding of the present utility model, and constitutes the part of specification, is used from explanation the utility model with embodiment one of the present utility model, does not constitute restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the RJ45 connector circuit schematic diagram according to built-in ethernet transformer of the prior art;
Fig. 2 is according to the employing piezo-resistance of the utility model embodiment circuit theory schematic diagram as the ethernet connector of surge bleed off device;
Fig. 3 is the lightning surge said current dumping path schematic diagram of ethernet connector shown in Figure 2.
Embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present utility model is described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the utility model, and be not used in qualification the utility model.
According to embodiment of the present utility model, provide a kind of ethernet connector with lightning protection function.
Fig. 2 is according to the employing piezo-resistance of the utility model embodiment circuit theory schematic diagram as the ethernet connector of surge bleed off device, as shown in Figure 2, this embodiment is improved on the basis of existing RJ45 connector commonly used as shown in Figure 1: increased a piezo-resistance VR as surge bleed off device between transformer lines side centre cap CT and earth terminal GND, formed lightning surge bleed off path by this piezo-resistance VR.
During this embodiment of specific implementation, transformer, the connection of lightning surge bleed off path are enclosed in the shield shell, this shield shell is directly connected earth terminal GND, and therefore, surge bleed off device is actually and is connected across between transformer lines side centre cap and the shield shell.
When lightning surge arrives, lightning surge voltage on the ethernet line raises gradually, this surge voltage is delivered on the centre cap CT of line side by transformer, when the voltage on the center tap CT does not reach the reference voltage of piezo-resistance, lightning surge voltage can charge to C1 by R1, because it is very little that the total energy of the energy that this charging process absorbs and lightning surge is compared, so differential lines (RX+, RX-, TX+, TX-) and centre cap CT on lightning surge voltage can continue to rise, when voltage rises to reference voltage U above piezo-resistance
1mAThe time, piezo-resistance enters the clamper service area, as shown in Figure 3, the lightning surge electric current is along differential lines (RX+, RX-, TX+, TX-)-the path bleed off of transformer T1-transformer lines side centre cap CT-piezo-resistance VR-earth terminal GND, therefore, the rising of lightning surge voltage is effectively checked, differential lines (RX+, RX-have been avoided, TX+, TX-) and earth terminal GND circuit between puncture, thereby lightning surge voltage can not be transparent to the chip side circuit from transformer T1, so can not smash the phenomenon of Ethernet interface chip.
When no lightning surge occurs; because the symmetry of ethernet circuit itself and Ethernet transformer T1 every straight function; neither there are the ethernet signal voltage of high frequency between the ground in the centre cap CT of T1 and protection, also do not have the direct voltage or the power-frequency voltage of usefulness.Therefore, optionally surge bleed off device wide range except the piezo-resistance that the foregoing description adopts, can also be selected the smaller gas discharge tube of stray capacitance for use, semiconductor discharge tube, TVS diode etc.
More than describe all and launch with 100 m ethernet RJ45 connector, same lightning surge means of defence also is applicable to gigabit Ethernet RJ45 connector.
To sum up,
1, the utility model adopts the bleed off device of piezo-resistance as surge, and it is unaffected substantially repeatedly to carry out lightning Protection and protective capacities;
2, by improvement to existing RJ45 connector commonly used, surge bleed off device is connected across between transformer lines side centre cap and the shield shell, form lightning surge bleed off path, guaranteeing under the cheap prerequisite of design cost, strengthened the ability of connector opposing thunderbolt;
3, the lightning surge bleed off path of surge bleed off device formation is connected the encirclement of device shield shell, can prevent effectively that the strong electromagnetic that lightning surge bleed off electric current produces from influencing the device interior circuit.
More than about the description of lightning surge bleed off part category, parameter and ethernet type, only be embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.
Claims (4)
1. ethernet connector with lightning protection function, comprise transformer, described transformer lines side centre cap is provided with lightning surge bleed off path, it is characterized in that, described connector also comprises surge bleed off device, and described lightning surge bleed off path is connected across between described transformer lines side centre cap and the earth terminal by described surge bleed off device and forms.
2. the ethernet connector with lightning protection function according to claim 1 is characterized in that, described surge bleed off device is a piezo-resistance.
3. the ethernet connector with lightning protection function according to claim 1 is characterized in that, described surge bleed off device is the little gas discharge tube of stray capacitance, semiconductor discharge tube or TVS diode.
4. according to each described ethernet connector with lightning protection function in the claim 1 to 3, it is characterized in that described transformer and surge bleed off device are closed in the shield shell, described shield shell is connected with earth terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201326395U CN201278411Y (en) | 2008-08-13 | 2008-08-13 | Ethernet connector with lightning protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201326395U CN201278411Y (en) | 2008-08-13 | 2008-08-13 | Ethernet connector with lightning protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201278411Y true CN201278411Y (en) | 2009-07-22 |
Family
ID=40896000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201326395U Expired - Lifetime CN201278411Y (en) | 2008-08-13 | 2008-08-13 | Ethernet connector with lightning protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201278411Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185303A (en) * | 2011-05-06 | 2011-09-14 | 武汉长光科技有限公司 | Prevention circuit capable of supporting withstand voltage and surge of port simultaneously |
| CN102222894A (en) * | 2010-04-13 | 2011-10-19 | 富士康(昆山)电脑接插件有限公司 | Network connection common-mode signal protection circuit |
| CN102446616A (en) * | 2010-10-14 | 2012-05-09 | 富士康(昆山)电脑接插件有限公司 | Filter circuit and electric connector with same |
| WO2013149575A1 (en) * | 2012-04-01 | 2013-10-10 | 华为终端有限公司 | Lightning protection circuit, switching power supply and lightning protection method |
| CN104795705A (en) * | 2015-04-09 | 2015-07-22 | 胡清桂 | Anti-thunder parallel double-wire RJ45 network information module |
| CN104977487A (en) * | 2015-06-24 | 2015-10-14 | 浪潮电子信息产业股份有限公司 | Method for reducing average value of network port conducted interference |
| CN106210595A (en) * | 2012-11-22 | 2016-12-07 | 江苏华兴电子有限公司 | For guaranteeing the antenna isolator of high-frequency signal transmission quality |
| CN107976597A (en) * | 2017-11-27 | 2018-05-01 | 晶晨半导体(上海)股份有限公司 | A kind of surge test circuit |
| CN108539533A (en) * | 2017-03-03 | 2018-09-14 | 富士康(昆山)电脑接插件有限公司 | Network connector |
-
2008
- 2008-08-13 CN CNU2008201326395U patent/CN201278411Y/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102222894A (en) * | 2010-04-13 | 2011-10-19 | 富士康(昆山)电脑接插件有限公司 | Network connection common-mode signal protection circuit |
| CN102446616B (en) * | 2010-10-14 | 2016-03-23 | 富士康(昆山)电脑接插件有限公司 | Filter circuit and there is the electric connector of this filter circuit |
| CN102446616A (en) * | 2010-10-14 | 2012-05-09 | 富士康(昆山)电脑接插件有限公司 | Filter circuit and electric connector with same |
| CN102185303A (en) * | 2011-05-06 | 2011-09-14 | 武汉长光科技有限公司 | Prevention circuit capable of supporting withstand voltage and surge of port simultaneously |
| WO2013149575A1 (en) * | 2012-04-01 | 2013-10-10 | 华为终端有限公司 | Lightning protection circuit, switching power supply and lightning protection method |
| US9391445B2 (en) | 2012-04-01 | 2016-07-12 | Huawei Device Co., Ltd. | Surge protection circuit, switching power supply, and surge protection method |
| CN106210595A (en) * | 2012-11-22 | 2016-12-07 | 江苏华兴电子有限公司 | For guaranteeing the antenna isolator of high-frequency signal transmission quality |
| CN106210595B (en) * | 2012-11-22 | 2018-12-07 | 江苏华兴电子有限公司 | For ensuring the antenna isolator of high-frequency signal transmission quality |
| CN104795705A (en) * | 2015-04-09 | 2015-07-22 | 胡清桂 | Anti-thunder parallel double-wire RJ45 network information module |
| CN104977487A (en) * | 2015-06-24 | 2015-10-14 | 浪潮电子信息产业股份有限公司 | Method for reducing average value of network port conducted interference |
| CN104977487B (en) * | 2015-06-24 | 2017-10-13 | 浪潮电子信息产业股份有限公司 | Method for reducing average value of network port conducted interference |
| CN108539533A (en) * | 2017-03-03 | 2018-09-14 | 富士康(昆山)电脑接插件有限公司 | Network connector |
| CN107976597A (en) * | 2017-11-27 | 2018-05-01 | 晶晨半导体(上海)股份有限公司 | A kind of surge test circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090722 |