CN102723706A - PoE port overvoltage comprehensive protection circuit and method for realizing same - Google Patents
PoE port overvoltage comprehensive protection circuit and method for realizing same Download PDFInfo
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Abstract
The invention discloses a Power over Ethernet (PoE) port overvoltage comprehensive protection circuit and a method for realizing the circuit. The PoE port overvoltage comprehensive protection circuit comprises two-stage protection circuits, wherein the first-stage protection circuit adopts a triode gas discharge tube and is used for discharging lightning stroke current to the ground; the second-stage protection circuit adopts a clamp type overvoltage protection device and is used for carrying out first-stage residual voltage and electrostatic protection; a resistor and common-mode inductor combination circuit is adopted between the first-stage protection circuit and the second-stage protection circuit and is used for coordinating performance characteristics among the two-stage protection circuits and the device so as to achieve the effect of decoupling between the first-stage protection circuit and the second-stage protection circuit. Owing to the PoE port overvoltage comprehensive protection circuit, the balance of protection circuits can be enhanced and the amplitude and energy for conversion from common-mode overvoltage to differential-mode overvoltage can be reduced so as to improve the protection effect.
Description
Technical field
The present invention relates to ethernet technology, relate in particular to a kind of POE (PoE, Power Over Ethernet) port overvoltage integrated protection circuit and its implementation.
Background technology
Construction along with 3G network; POE (PoE) technology has obtained great development space; This technology can be WAP (AP; Access Point), the shooting the first-class various device that utilizes Ethernet to communicate data communication and supply of electric power are provided, simplified the laying cost of circuit greatly, make this technology obtain large-scale application.But the thing followed is the protection question of PoE power supply port to become increasingly conspicuous, and the PoE port both provided data communication, and electric power transfer also is provided, and this has determined the particularity of its protection, need take into account the protection of data circuit and PoE circuit.
Be limited by the restriction of technology maturity at present to the protectiving scheme of PoE port; Do not form a cover by the scheme of generally accepting and using; Find through investigation; The PoE port-guard technology that generally adopts at present is the two poles of the earth protection, and the first order is used for releasing of the main energy of lightning surge with piezo-resistance (MOV) or the two poles of the earth gas discharge tube; Transient Voltage Suppressor (TVS) is adopted in the second level, is used for the clamper surge voltage; Two interpolars generally adopt inductance to realize decoupling.But mainly there is following some deficiency in such scheme:
1) common mode protection inter-stage symmetry is not enough, when suffering big surge rush of current, can produce bigger differential mode voltage, can increase the weight of the burden of back level protection circuit, even can't play protective action, specifies as follows:
Piezo-resistance is limited by the restriction of self operational characteristic, and the precision of dc breakdown voltage can't be accomplished very high, relatively rated value; Generally have ± 10% with interior deviation, the deviation maximum of two piezo-resistance operation voltages can reach 20% of rated value so, when suffering the invasion and attack of common mode overvoltage surge; Two piezo-resistances are because operation voltage inconsistent; Will produce too high differential mode overvoltage, promptly the common mode overvoltage has transformed out the differential mode overvoltage. and still be the PoE power supply circuits for datel circuit no matter, the differential mode overvoltage has very big harmfulness; The main argumentation as follows: for datel circuit; High frequency transformer on the data circuit can completely cut off the common mode overvoltage, but can't intercept the differential mode overvoltage, and the differential mode overvoltage is after-applied on the pin of back level communication chip through transformer; And communication chip since operational characteristic to the superpotential tolerance of differential mode all very a little less than, very easily cause afunction or the performance of chip to reduce; For the PoE power supply circuits; The differential mode overvoltage can be applied on the various signal pins and supply pin of PoE control chip equally; Like the 48V both positive and negative polarity of chip, MOSFET drive signal, receiving end equipment (PD) detectable signal, current detection signal etc.; These chip pins are cmos circuit, and a little less than superpotential ability to bear, the differential mode overvoltage is prone to cause the inefficacy of these signal pins and supply pin or performance to reduce; If the first order adopts the secondary gas discharge tube; Then owing to the gas discharge tube operational characteristic, the error of its operation voltage is that the operation voltage error of ± 20%, two gas discharge tubes can reach 40%; Will cause the positive and negative wire serious imbalance of overvoltage surge over the ground; This will produce too high differential mode overvoltage, and with aforementioned analysis, this differential mode overvoltage very easily causes the damage of late-class circuit.
2) first order protection circuit adopts piezo-resistance to have potential safety hazard, because the operational characteristic of piezo-resistance self, after suffering surge impact; Its internal structure can change, and operation voltage can change, i.e. performance degradation; If operation voltage reduces, then leakage current can increase, under 48V voltage long term; It is very boiling hot that piezo-resistance may become, even on fire, and this will cause safety problem; And because the not enough 1A of PoE supply current, this makes and cooperates protection to be difficult to realize through fuse that so safety problem is difficult to solve, if this scheme is used in a large number, potential safety hazard can be bigger on engineering.
The problem that can have afterflow when 3) first order adopts gas discharge tube; Gas discharge tube is a switch property device; When it is in running order, can be between electrode owing to arc discharge is in short-circuit condition, after overvoltage disappears; Still can be between electrode owing to the PoE supply power voltage is kept arc discharge, thus short circuit between PoE voltage caused.
4) scheme before concentrates on supply line's lightning Protection; The notion of integrated protection is not proposed; The data function of port and PoE function of supplying power all need protection in fact, and port has lost data function or the PoE function of supplying power all will be that the user is unacceptable, and a side implements so protection can not only be directed against wherein; And should the two be combined common protection.
5) protectiving scheme before is stressed lightning Protection; But the PoE port has been compared its particularity with simple FPDP or simple power port; FPDP is realized the external circuit and inner electrical isolation of data circuit through the isolation coupling transformer, for the infringement of Electrostatic Discharge very strong protective capacities is arranged; But the PoE port has the PoE control circuit, and this part circuit directly is connected with external circuit, is subject to the exterior static invasion and attack.Wherein, PoE control chip and MOSFET belong to the ESD Sensitive Apparatus, receive the static invasion and attack easily and damage or performance reduction, and MOSFET directly links to each other with data-interface on circuit, and static is very easily invaded the safety that threatens MOSFET from port; The PoE control chip then has a plurality of control signal pin directly to be connected with power circuit; Like MOSFET drive signal, current detection signal, PD detectable signal etc.; These signals are the CMOS integrated circuit at chip internal; Limited to superpotential ability to bear, static can be invaded the inefficacy or the performance that cause these signals from port equally and reduced, but former protection circuit is paid close attention to deficiency to electrostatic defending.
Summary of the invention
In view of this; Main purpose of the present invention is to provide a kind of PoE port overvoltage integrated protection circuit and its implementation; Through adopting suitable protection circuit and protective device; Improve the balance of protection circuit, reduce the common mode overvoltage and be converted into superpotential amplitude of differential mode and energy, to improve protection effect; Solve the intrinsic afterflow technical disadvantages of gas discharge tube; The protection of PoE power supply port and the protection of FPDP be can take into account, and lightning surge protection and electrostatic defending taken into account; Adopt this protection circuit and protective device can guarantee potential safety hazard can not occur in the situation of component failure.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of POE PoE port overvoltage integrated protection circuit only comprises second level protection circuit, and said second level protection circuit all adopts Transient Voltage Suppressor TVS device.
Wherein: said second level protection circuit is applicable to data circuit or PoE circuit.
A kind of POE PoE port overvoltage integrated protection circuit comprises the two-stage protection circuit, wherein:
First order protection circuit adopts three utmost point gas discharge tubes, is used to realize releasing over the ground of thunder-strike current; Second level protection circuit adopts clamper type over-voltage protector, is used to realize electrostatic defending; Between said first order protection circuit and the second level protection circuit, adopt resistance and common mode inductance combinational circuit,, reach the effect of decoupling between first order protection circuit and second level protection circuit to coordinate the operating characteristics between said two-stage protection circuit and the device.
Wherein: said first order protection circuit, further adopt the mode of the thermo-responsive resistance PPTC of said three utmost point gas discharge pipe jointing high molecular positive temperature coefficients.
The clamper type over-voltage protector of said second level protection circuit is Transient Voltage Suppressor TVS device.
Said resistance is wire wound resistor.
Described TVS device then should be positioned over the inferior limit of isolating transformer if be used for the protection of data-interface.
A kind of implementation method of POE PoE port overvoltage integrated protection circuit, this method comprises:
In first order protection circuit, be provided for realizing the step of three utmost point gas discharge tubes of releasing over the ground of thunder-strike current;
In the protection circuit of the second level, be used to realize the step of the clamper type over-voltage protector of electrostatic defending; And,
Between said first order protection circuit and second level protection circuit; Adopt resistance and common mode inductance compound mode, to coordinate the operating characteristics between said two-stage protection circuit and the device and to reach the step of decoupling between first order protection circuit and second level protection circuit.
Said second level protection circuit all adopts Transient Voltage Suppressor TVS device.
PoE port overvoltage integrated protection circuit of the present invention and its implementation have the following advantages:
Adopt the present invention, can make the superpotential protection effect of PoE port obtain comprehensive lifting, be in particular in following several aspect:
1) adopt three utmost point gas discharge tubes to do first order protection; Make common mode protection inter-stage symmetry be greatly improved; Can well guarantee the common mode protection action consistency between power positive cathode, minimize the superpotential generation of differential mode, thereby play the better protection effect.Prove that through test experiments adopt this means of defence can improve the degree of protection of port lightning current greatly, this grade lightning current degree of protection can reach 3000A (8/20 μ S), this has satisfied the demand of most application scenarios.
2) gas discharge tube and PPTC are used the afterflow problem that can solve gas discharge tube effectively, and test shows is released moment at lightning current, and PPTC is a low resistive state, can not influence releasing of lightning current; After lightning current is released completion, because the existence of PoE supply power voltage makes gas discharge tube be in the afterflow state, at this moment, PPTC will become high-impedance state rapidly, cut off the PoE continuous current circuit.Show through test experiments,, make the PoE supply power voltage can not produce excessive falling, can guarantee the normal power supply of equipment because the PPTC corresponding speed is fast.
3) the present invention proposes the notion of integrated protection, and protection circuit can realize that common protection, surge and the static of data and PoE circuit protect jointly.For PoE equipment, its functional characteristics just can electric energy transmitting in the transmission data, if the two loses one of which; As far as the user all is unacceptable, so the protection of PoE port must the two take into account; Make the protective device of the two shared as far as possible; When guaranteeing protection effect, reduce device cost and to the requirement in PCB space, in that this advocates energy-saving and emission-reduction, epoch that equipment volume is more and more littler at present, this design to product is very important.The actual PCB of slave unit designs, and these protective devices can lay in the acceptable space of equipment, can't make that port devices density is too high and causes other problem.Actual electrostatic test can reach the test request that contacts 6KV and atmospherical discharges 8KV, and this has satisfied most application scenarios, so this scheme is consistent with theoretical analysis both, has satisfied the engineering practical application again.
Description of drawings
Fig. 1 adopts the protection circuit sketch map of data wire power supply port for the present invention;
The protection circuit sketch map of Fig. 2 for adopting dead pair to supply power;
Fig. 3 for interconnected communication equipment is placed in when indoor the PoE circuit all adopt the simplification circuit diagram of TVS protection;
Fig. 4 for interconnected communication equipment is placed in when indoor data circuit and PoE circuit all adopt the simplification circuit diagram of TVS protection;
The circuit diagram of differential mode TVS protection was all adopted in the protection of the first order protection circuit and the PoE second level when Fig. 5 went out the chamber for circuit;
Fig. 6 is the protection circuit sketch map that removes the PPTC device shown in Figure 1.
Embodiment
Below in conjunction with accompanying drawing and embodiments of the invention protection circuit of the present invention and method thereof are done further detailed explanation.
Fig. 1 adopts the protection circuit sketch map of data wire power supply port for the present invention, and is as shown in Figure 1, is the complete protection circuit from network interface RJ45 to PoE control circuit and data circuit.Wherein: first order protection circuit adopts gas discharge tube (GDT) to combine the mode of the thermo-responsive resistance of high molecular positive temperature coefficient (PPTC); Second level protection circuit adopts the mode of Transient Voltage Suppressor (TVS), adopts resistance and common mode inductance decoupling between the two-stage protection.
The characteristics of existing gas discharge tube are that through-current capability is strong, so utilize it will be struck by lightning main current drain to the earth, are the important measures in the lightning Protection; But because there is the inherent defect of afterflow in gas discharge tube, and the PoE operating voltage of 48V will cause gas discharge tube blow-out automatically, so first order protection circuit is used gas discharge tube and PPTC device can well to address this problem.Second level protection circuit adopts Transient Voltage Suppressor (TVS) device to be used for the clamper overvoltage.The characteristics of TVS device are that response speed is fast, and clamp voltage is accurate, in the overvoltage scope of selecting suitable TVS device can make protected device be in can to bear.In order to coordinate the operating characteristics between first order protection circuit and second level protection circuit; Guarantee that the two-stage protection circuit all can play due effect; Inter-stage need be provided with decoupling circuit, and the mode that such scheme of the present invention has adopted resistance and common mode inductance to combine can make the decoupling maximum effect.
The protection circuit sketch map of Fig. 2 for adopting dead pair (the 4th, 5 lines and the 7th, 8 lines) to supply power, the same Fig. 1 of its principle is so repeat no more.
The present invention adopts perfect protection circuit, is applicable to various applied environments, and especially more abominable applied environment for some applied environments relatively preferably, can suitably be simplified protection circuit, concrete example such as Fig. 3, shown in Figure 4.
[embodiment one]
If it is indoor that interconnected communication equipment all is placed in, there is not circuit to go out the chamber, and not high to data port protection and PoE circuit requirement of shelter; In order to reduce cost, can adopt following reduction procedure (is example with the data wire power supply plan), as shown in Figure 3; This scheme has been deleted first order protection circuit, has only stayed the second level protection circuit of PoE circuit, and the PoE circuit all adopts the TVS protection; The advantage of this protection mode is that protection circuit is simple; Cost is low, but protective capacities a little less than, port integral body can be born the impact of 1.5k V with interior lightning surge.
[embodiment two]
If interconnected communication equipment all cloth is placed on indoorly, there is not circuit to go out the chamber, in order to reduce cost; Can adopt following reduction procedure: as shown in Figure 4, this scheme has been deleted first order protection circuit, has only stayed second level protection circuit; No matter be that data circuit or PoE circuit all adopt the TVS protection, the advantage of this protection mode is that protection circuit is simple, and cost is low; But protective capacities a little less than, port integral body can be born the impact of 2k V with interior lightning surge.
With the example that is applied as of outdoor cabling, protection circuit of the present invention is described below.
[embodiment three]
If circuit goes out the chamber, then need stronger protective capacities, first order protection is essential; If take into account the requirement of cost, also can adopt scheme as shown in Figure 5, this scheme has kept the differential mode protection TVS in first order protection circuit and the protection of the PoE second level; Because gas discharge tube is realized releasing of lightning current; If (PCB) is reasonable in design for printed circuit board (PCB), the isolating transformer function admirable, this protection circuit can be realized the protective capacities of the whole 4KV of port.
[embodiment four]
This embodiment is fit to outdoor cabling, the higher occasion of reliability requirement.
If circuit can go out the chamber, the possibility of the energy that suffers to be struck by lightning greatly is bigger, then need adopt perfect scheme; Then can adopt like Fig. 1 or complete protectiving scheme shown in Figure 2, its protection circuit adopts two-stage protection circuit, the first order protection circuit big electric current of thunderbolt of releasing; Second level protection circuit clamper overvoltage, thus play perfect protection effect, if PCB is reasonable in design; Parts selection is correct, can reach 6KV and above protective capacities.
[embodiment five]
Also can adopt PoE autoprotection circuit to extinguish the mode of gas discharge tube electric arc; A lot of PoE circuit all have overcurrent and short-circuit protection function; When gas discharge tube is in the afterflow state; Can utilize this defencive function extinguish arcs, but can cause the interruption in short-term of PoE power supply, can remove PPTC the occasion that this data integrity is less demanding.As shown in Figure 6.
As stated, protection circuit of the present invention has following characteristics:
1) this protectiving scheme has adopted the two-stage protection circuit, and first order protection circuit adopts three utmost point gas discharge tubes to realize releasing over the ground of thunder-strike current, the main energy of thunder and lightning is released in this one-level protect ground.Three utmost point gas discharge tubes are that three electrodes are placed in the same cavity, and when the inert gas in the cavity produced ionization, three electrodes can promptly reach the state of electrical communication, and the time difference generally can be less than 200ns, and the product of some manufacturer can be accomplished in the 80ns.We are connected two electrodes of the left and right sides of gas discharge tube respectively with by guard electrode; Target is connected with protection ground, and this has just guaranteed two guard electrodes to protecting the balance on ground, and this balance is extremely important to the protection of balancing circuitry; Make the common mode overvoltage protection of balanced circuit of this circuit; Can be so that the differential mode overvoltage that produces owing to circuit is asymmetric minimize, and for the various functional chips based on CMOS technology, the differential mode overvoltage causes the damage of chip pin internal protection circuitry and other circuit the most easily; So; It is very crucial to reduce the differential mode overvoltage, and three utmost point gas discharge tubes have just in time satisfied this requirement, adopt three utmost point gas discharge tubes to have more excellent protection effect than piezo-resistance and the two poles of the earth gas discharge tube.
2) gas discharge tube is because self operational characteristic; There is the problem of afterflow in it, and after the thunderbolt energy caused it to get into the arc discharge state, the voltage of keeping this conducting state only needed about 20V; And the direct voltage of PoE power supply reaches volt more than 50; This voltage can be kept the conducting state of gas discharge tube, and this makes the supply power voltage of PoE be in short-circuit condition, and the PoE function can't operate as normal; The present invention adopts the series connection with it of the thermo-responsive resistance of high molecular positive temperature coefficient (PPTC) device, to play the purpose of impelling the gas discharge tube blow-out.Said PPTC device has that response speed is fast, the accurate advantage of operating point, and has from recovery characteristics; Select suitable PPTC device; When gas discharge tube gets into the afterflow state, the PPTC device will cut off continuous current circuit apace, thereby extinguish the inner electric arc of gas discharge tube; And, can the guaranteeing when next time thunderbolt takes place of PPTC device from recovery characteristics, protection circuit can operate as normal, so, adopt PPTC to solve the afterflow problem of flue well, and do not reduce barrier propterty.
3) adopt gas discharge tube to have higher fail safe; The architectural characteristic of gas discharge tube has determined its failure mode to be open circuit, and the failure mode of piezo-resistance is in the majority with short circuit, and this can cause potential safety hazard; So, adopt gas discharge tube to have better fail safe.
4) two three utmost point gas discharge tubes of first order protection employing, two lateral electrodes of one of them are connected to the centre cap of transformer sending and receiving, and when adopting the data wire power supply, this device has been realized the first order protection of PoE power supply circuits and data circuit; Another gas discharge tube is used for the protection of dead pair, because the discharge capacity of gas discharge tube is big, so the dead pair of a plurality of ports can a shared gas discharge tube, can reduce the protective device cost like this; If feeder ear equipment (PSE) adopts the dead pair power supply; Be connected in the centre tapped gas discharge tube of transformer and realize the first order protection of data wire; Equally can the shared gas discharge tube of a plurality of ports to reduce cost, the gas discharge tube that is connected in dead pair is realized the protection of PoE circuit, from above-mentioned visible; First order protection has taken into account the protection of data wire and the protection of PoE power supply circuits, has realized the integrated protection of data circuit and PoE circuit.
5) clamper type over-voltage protector is adopted in second level protection, and the most frequently used is Transient Voltage Suppressor, i.e. TVS; TVS has that corresponding speed is fast, the accurate advantage of clamp voltage, because first order protection circuit has just been realized releasing over the ground of thunder and lightning macro-energy, it is the extensive protection of a clock; After first order protection, the thunder and lightning energy weakens greatly, but still can have higher overvoltage; This voltage can cause the damage of late-class circuit, so protection voltage TVS device is accurately adopted in second level protection, and can be according to being reached superpotential ability to bear by the characteristic of protective circuit; Select only device, to realize best protection effect, so the selection of the parameter of second level protective device is very important; For data port protection because operating voltage is low, data chip to superpotential ability to bear a little less than; So select the TVS of low-voltage, can select the specification of 3.3V or other voltage for use; For the protection of PoE circuit, because the PoE operating voltage can reach 57V, thus should select rated operational voltage to be higher than the TVS of this value, but should not exceed too much, otherwise will influence protection effect; The placement location of TVS is also very important, and they should can realize best protection effect so as far as possible near protected device.See that from above-mentioned second level protection has taken into account data port protection and the protection of PoE circuit equally.
6) the TVS device of second level protection circuit employing is good electrostatic protection device, so protection circuit has also been realized the electrostatic defending of FPDP and PoE circuit when realizing lightning Protection.
7) in order to coordinate the operating characteristics between the two-stage protection circuit; Adopted common mode inductance to add the mode of wire wound resistor combination for the protection of PoE circuit; For common mode lightning surge electric current; These two kinds of devices can both play the effect of high impedance, can well coordinate the operating characteristics between two-stage protection circuit and device like this, play the effect of decoupling between first order protection circuit and second level protection circuit.Said TVS device then should be positioned over the inferior limit of isolating transformer if be used for the protection of data-interface, and isolating transformer has played coordination two-stage protection circuit operating characteristics, plays the effect of decoupling between first order protection circuit and second level protection circuit.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.
Claims (9)
1. a POE PoE port overvoltage integrated protection circuit is characterized in that, comprises second level protection circuit, and said second level protection circuit adopts Transient Voltage Suppressor TVS device.
2. PoE port overvoltage integrated protection circuit according to claim 1 is characterized in that said second level protection circuit is applicable to data circuit or PoE circuit.
3. a POE PoE port overvoltage integrated protection circuit is characterized in that, comprises the two-stage protection circuit, wherein:
First order protection circuit adopts three utmost point gas discharge tubes, is used to realize releasing over the ground of thunder-strike current; Second level protection circuit adopts clamper type over-voltage protector, is used to realize first order protection residual voltage and electrostatic defending; Between said first order protection circuit and the second level protection circuit, adopt resistance and common mode inductance combinational circuit,, reach the effect of decoupling between first order protection circuit and second level protection circuit to coordinate the operating characteristics between said two-stage protection circuit and the device.
4. PoE port overvoltage integrated protection circuit according to claim 3 is characterized in that, said first order protection circuit further adopts the mode of the thermo-responsive resistance PPTC of said three utmost point gas discharge pipe jointing high molecular positive temperature coefficients.
5. PoE port overvoltage integrated protection circuit according to claim 3 is characterized in that the clamper type over-voltage protector of said second level protection circuit is Transient Voltage Suppressor TVS device.
6. PoE port overvoltage integrated protection circuit according to claim 3 is characterized in that said resistance is wire wound resistor.
7. PoE port overvoltage integrated protection circuit according to claim 5 is characterized in that, described TVS device then should be positioned over the inferior limit of isolating transformer if be used for the protection of data-interface.
8. the implementation method of a POE PoE port overvoltage integrated protection circuit is characterized in that this method comprises:
In first order protection circuit, be provided for realizing the step of three utmost point gas discharge tubes of releasing over the ground of thunder-strike current;
In the protection circuit of the second level, be used to realize the step of the clamper type over-voltage protector of electrostatic defending; And,
Between said first order protection circuit and second level protection circuit; Adopt resistance and common mode inductance compound mode, to coordinate the operating characteristics between said two-stage protection circuit and the device and to reach the step of decoupling between first order protection circuit and second level protection circuit.
9. PoE port overvoltage comprehensive protecting method according to claim 8 is characterized in that said second level protection circuit all adopts Transient Voltage Suppressor TVS device.
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| CN102969706A (en) * | 2012-11-23 | 2013-03-13 | 上海斐讯数据通信技术有限公司 | POE (Power Over Ethernet) power supply and lightning protection system and method |
| CN103095465A (en) * | 2013-01-21 | 2013-05-08 | 杭州优迈科技有限公司 | Power over Ethernet (POE) system and light-emitting diode (LED) lighting device using the same |
| CN104134986A (en) * | 2014-08-14 | 2014-11-05 | 刘雨佳 | Two-way dual-mode 485 communication lightning protector |
| CN104201662A (en) * | 2014-09-17 | 2014-12-10 | 深圳科安达电子科技股份有限公司 | System for providing surge energy control for POE (power over Ethernet) Ethernet |
| CN104597823A (en) * | 2014-12-08 | 2015-05-06 | 深圳市国微电子有限公司 | Aviation bus system and protective circuit thereof |
| CN104753048A (en) * | 2013-12-27 | 2015-07-01 | 中兴通讯股份有限公司 | POE power supply protection system and POE power supply protection method |
| CN105072363A (en) * | 2015-09-25 | 2015-11-18 | 四川金网通电子科技有限公司 | Wireless set top box with POE port |
| CN105829833A (en) * | 2013-12-13 | 2016-08-03 | 赫思曼自动化控制有限公司 | Surge-protected sensor element |
| CN108770192A (en) * | 2018-08-24 | 2018-11-06 | 上海市共进通信技术有限公司 | The PCB circuit wiring structures of adjacent networks port common mode lightning Protection function are realized in the network equipment |
| CN111049119A (en) * | 2019-12-06 | 2020-04-21 | 中国航空工业集团公司洛阳电光设备研究所 | High-grade lightning protection circuit and design method |
| CN111198286A (en) * | 2020-03-02 | 2020-05-26 | 深圳市共进电子股份有限公司 | Lightning stroke test protection module and system of POE (Power over Ethernet) equipment |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1472859A (en) * | 2002-07-30 | 2004-02-04 | 华为技术有限公司 | Lightening arresting method and device for Ethernet port |
| CN1549416A (en) * | 2003-05-10 | 2004-11-24 | 华为技术有限公司 | Thunder proof protective circuit for Ethernet interface |
| CN201018518Y (en) * | 2007-02-12 | 2008-02-06 | 赵福江 | Ethernet power supply overvoltage protector |
| CN201038746Y (en) * | 2007-05-22 | 2008-03-19 | 中兴通讯股份有限公司 | Protector for surge |
| US20090244800A1 (en) * | 2008-03-28 | 2009-10-01 | Timothy Craig Wedley | Surge protection apparatus and methods |
| CN201466715U (en) * | 2009-06-10 | 2010-05-12 | 北京欧地安科技股份有限公司 | Surge protector of gigabit network |
| CN201523227U (en) * | 2009-10-29 | 2010-07-07 | 百圳君耀电子（深圳）有限公司 | Ethernet surge protection circuit |
| CN201708517U (en) * | 2010-03-22 | 2011-01-12 | 深圳市芯朗金能源技术有限公司 | RS-485 communication interface protective circuit |
| CN201994655U (en) * | 2010-12-11 | 2011-09-28 | 株洲普天中普防雷科技有限公司 | Lightning protector for power supply network of Ethernet |
| CN202190074U (en) * | 2011-07-22 | 2012-04-11 | 南京宁普防雷技术有限公司 | Lightning protection device specially for POE network power supply apparatus |
-
2012
- 2012-05-30 CN CN201210172902.4A patent/CN102723706B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1472859A (en) * | 2002-07-30 | 2004-02-04 | 华为技术有限公司 | Lightening arresting method and device for Ethernet port |
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| CN111049119A (en) * | 2019-12-06 | 2020-04-21 | 中国航空工业集团公司洛阳电光设备研究所 | High-grade lightning protection circuit and design method |
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