CN106655142B - A kind of lightning protection circuit of Ethernet interface - Google Patents
A kind of lightning protection circuit of Ethernet interface Download PDFInfo
- Publication number
- CN106655142B CN106655142B CN201710126811.XA CN201710126811A CN106655142B CN 106655142 B CN106655142 B CN 106655142B CN 201710126811 A CN201710126811 A CN 201710126811A CN 106655142 B CN106655142 B CN 106655142B
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- zener diode
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/06—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters
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- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of lightning protection circuits of Ethernet interface, including network transformer U1 and connection terminal J1, the transmitting terminal of the network transformer U1 and the centre cap of receiving terminal pass through zener diode D2 and zener diode D1 ground connection respectively, a zener diode D6 is connected between the centre cap of transmitting terminal and the centre cap of receiving terminal, zener diode D1, D2 and D6 are for filtering common mode surge；Pin 4,5 short circuits, pin 7,8 short circuits of connection terminal J1, pin 4,5 short circuits one end by a zener diode D5 ground connection, pin 7,8 short circuits one end by a zener diode D4 ground connection, one end of pin 4, one end of 5 short circuits and pin 7,8 short circuits is connected with a zener diode D3, and zener diode D3, D4 and D6 are for filtering differential mode surge.The lightning protection circuit of Ethernet interface provided by the invention, circuit is simple, at low cost, can effectively improve the degree of protection of Ethernet interface, improves the reliability of product.
Description
Technical field
The present invention relates to anti-thunder technical field more particularly to a kind of lightning protection circuits of Ethernet interface.
Background technology
POE (Power over Ethernet, Ethernet) powers, and twisted-pair feeder can be penetrated in Etherloop by being one kind
To transmit electric power and the technology in data to device.The starting point of power over Ethernet is to allow IP phone, WLAN access points, net
The mininets equipment such as network camera, directly can obtain electric power from ethernet line, without being individually laid with power line, be to simplify
System wiring, reduces the construction cost of network infrastructure.
One complete POE system includes power supply end equipment (PSE, Power Sourcing Equipment) and receiving end
Equipment (PD, Powered Device) two parts.PSE device is the equipment powered for ethernet client equipment, is also simultaneously
The manager of entire POE Power over Ethernet processes.And PD equipment is to receive the PSE loads of power supply, i.e. the client of POE system is set
It is standby, such as IP phone, network security video camera, AP and palm PC (PDA) or many other Ethernets of charger for mobile phone
Actually, equipment (any power can obtain corresponding electric power no more than the equipment of 13W from RJ45 sockets).
In the case that web camera network interface supports POE power supplies, POE power supply chips can cause to fail by surge, existing
Lightning protection circuit in technology is complicated, of high cost, vulnerable in thunder and lightning City Regions during lightning protection, and protection is caused to fail, therefore, anxious
A kind of inexpensive, safe and reliable lightning protection circuit is needed to solve the above problems.
Invention content
Technical problem to be solved by the present invention lies in proposing a kind of lightning protection circuit of Ethernet interface, circuit is simple, cost
It is low, the degree of protection of Ethernet interface can be effectively improved, the reliability of product is improved.
In order to solve the above technical problems, the present invention uses following technical scheme：
A kind of lightning protection circuit of Ethernet interface, including network transformer U1 and connection terminal J1, the network transformer U1
Transmitting terminal and the centre cap of receiving terminal pass through zener diode D2 and zener diode D1 ground connection, the center of transmitting terminal respectively
A zener diode D6 is connected between tap and the centre cap of receiving terminal, described zener diode D1, D2 and D6 were used for
Filter common mode surge；5 short circuit of pin 4 and pin of the connection terminal J1,8 short circuit of pin 7 and pin of connection terminal J1, it is described
One end of 5 short circuit of pin 4 and pin of connection terminal J1 is by a zener diode D5 ground connection, the pin of the connection terminal J1
7 and 8 short circuit of pin one end by a zener diode D4 ground connection, one end of 5 short circuit of pin 4 and pin of connection terminal J1 with
One end of 8 short circuit of pin 7 and pin is connected with zener diode a D3, described zener diode D3, D4 and D6 for filtering difference
Mould surge；The transmitting terminal includes positive transmitting terminal and negative transmitting terminal, and positive transmitting terminal and negative transmitting terminal are separately connected connection terminal J1
Pin 1 and pin 2；The receiving terminal includes positive receiving terminal and negative receiving terminal, and positive receiving terminal and negative receiving terminal are separately connected company
The pin 3 and pin 6 of connecting terminal J1；
Wherein, the pin 1~8 of connection terminal J1 corresponds to cable interface A1~A8.
Wherein, the centre cap of the transmitting terminal and the centre cap of receiving terminal are separately connected the one of resistance R2 and resistance R1
End, the cathode of other end connection polar capacitor C2, the other end of resistance R2 of resistance R1 connect the cathode of polar capacitor C1, polarity
The anode of capacitance C1 and C2 pass through capacitance C3 ground connection, and described polar capacitor C1, C2 and capacitance C3 are for being isolated surge current.
Wherein, the connection terminal J1 further include have indicator light interface L1, L2, L3 and L4 and housing shroud interface M1, M2,
M3 and M4, housing shroud interface M3 and the M4 short circuit are simultaneously grounded.
Compared with prior art, beneficial effects of the present invention are：The present invention is by being connected to the transmitting terminal of network transformer
Centre cap and centre tapped zener diode D1, the zener diode D2 and zener diode D6 of receiving terminal filter common mode
Surge, by be connected to the connection terminal J1 one end of 5 short circuit of pin 4 and pin and the pin 7 of connection terminal J1 and pipe
The zener diode D3, zener diode D4 and zener diode D5 of one end of 8 short circuit of foot filter differential mode surge, effectively improve
The degree of protection of Ethernet interface improves the reliability of product, and circuit is simple, at low cost.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, institute in being described below to the embodiment of the present invention
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention
Example without creative efforts, can also be implemented for those of ordinary skill in the art according to the present invention
The content of example and these attached drawings obtain other attached drawings.
Fig. 1 is a kind of circuit diagram of the lightning protection circuit for Ethernet interface that the specific embodiment of the invention 1 provides.
Specific implementation mode
For make present invention solves the technical problem that, the technical solution that uses and the technique effect that reaches it is clearer, below
The technical solution of the embodiment of the present invention will be described in further detail in conjunction with attached drawing, it is clear that described embodiment is only
It is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those skilled in the art exist
The every other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
As shown in Figure 1, Fig. 1 is a kind of circuit of the lightning protection circuit for Ethernet interface that the specific embodiment of the invention 1 provides
Figure, in some preferred embodiments, which includes：The center of the transmitting terminal and receiving terminal of the network transformer U1
Tap passes through zener diode D2 and zener diode D1 ground connection, the centre cap of transmitting terminal and the centre cap of receiving terminal respectively
Between be connected with a zener diode D6, described zener diode D1, D2 and D6 are for filtering common mode surge；The connection terminal
5 short circuit of pin 4 and pin of J1,8 short circuit of pin 7 and pin of connection terminal J1, the pin 4 and pin of the connection terminal J1
By a zener diode D5 ground connection, one end of 8 short circuit of pin 7 and pin of the connection terminal J1 is passed through for one end of 5 short circuits
One zener diode D4 ground connection, one end of one end and 8 short circuit of pin 7 and pin of 5 short circuit of pin 4 and pin of connection terminal J1
Zener diode a D3, described zener diode D3, D4 and D6 is connected with for filtering differential mode surge；The transmitting terminal includes just
Transmitting terminal (TX+) and negative transmitting terminal (TX-), positive transmitting terminal and negative transmitting terminal are separately connected the pin 1 and pin of connection terminal J1
2；The receiving terminal includes positive receiving terminal (RX+) and negative receiving terminal (RX-), and positive receiving terminal and negative receiving terminal are separately connected connecting pin
The pin 3 and pin 6 of sub- J1；Wherein, the pin 1~8 of connection terminal J1 corresponds to cable interface A1~A8.
In some preferred embodiments, network transformer U1 can be the regular sizes such as PM44-11BP, TS21C-HF, institute
The transmitting terminal of side and the centre cap (CT) of receiving terminal for stating network transformer U1 connection connection terminals J1 correspond to network
The pin 15 and pin 10 of transformer U1, the centre cap VA2 of transmitting terminal and the centre cap VA1 of receiving terminal pass through voltage stabilizing respectively
Diode D2 and zener diode D1 are grounded, and a zener diode D6, zener diode D6 are connected between two centre caps
Cathode connection centre cap VA1, anode connection centre cap VA2, described zener diode D1, D2 and D6 be for filtering common mode
Surge.The positive transmitting terminal and negative transmitting terminal of network transformer U1 corresponds to pin 16 and pin 14 respectively, and network transformer U1 is just
Receiving terminal and negative receiving terminal correspond to pin 11 and pin 9 respectively.One end VB1 of 5 short circuit of pin 4 and pin of connection terminal J1 with
One end VB2 of 8 short circuit of pin 7 and pin is connected with a zener diode D3, and the cathode of zener diode D3 meets VB1, anode connects
VB2, VB1 connect zener diode D5 cathode, and VB2 connection zener diode D4 cathode, the anode of zener diode D5 and D4 are
Ground connection, zener diode D3, D4 and D6 are for filtering differential mode surge.
The setting of zener diode D1~D6 mainly considers common mode surge and differential mode surge two ways, when equipment by
When lightning stroke, shunting can be connected within the extremely short time and absorb the energy that lightning stroke generates, effective protection network transformer and POE
The damage that chip is not struck by lightning, and using zener diode D1~D6 as protective device, while improving degree of protection,
Protection cost is also reduced, is improved a lot to the competitiveness of product, effective protection POE chips.
As shown in Figure 1, in some preferred embodiments, the centre cap of the transmitting terminal of network transformer and receiving terminal
Centre cap is separately connected one end of resistance R2 and resistance R1, cathode, the resistance of the other end connection polar capacitor C2 of resistance R1
The anode of the cathode of the other end connection polar capacitor C1 of R2, polar capacitor C1 and C2 passes through capacitance C3 ground connection, the polarity
Capacitance C1, C2 and capacitance C3 are for being isolated surge current.
As shown in Figure 1, in some are preferably implemented, the connection terminal J1 further includes having indicator light interface L1, L2, L3
And L4 (corresponding to the pin 13~16 in connection terminal J1) and housing shroud interface M1, M2, M3 and M4 (correspond to connection terminal
Pin 9~12 in J1), housing shroud interface M3 and the M4 short circuit is simultaneously grounded, the shell for shielding connection terminal J1.
The present invention is by being connected to the centre tapped voltage stabilizing of the centre cap and receiving terminal of the transmitting terminal of network transformer
Diode D1, zener diode D2 and zener diode D6 filter common mode surge, by the pipe for being connected to the connection terminal J1
The zener diode D3 of one end of 5 short circuit of foot 4 and pin and one end of 8 short circuit of pin 7 and pin of connection terminal J1, voltage stabilizing two
Pole pipe D4 and zener diode D5 filter differential mode surge, effectively improve the degree of protection of Ethernet interface, improve the reliable of product
Property, and circuit is simple, at low cost.
The technical principle of the present invention is described above in association with specific embodiment.These descriptions are intended merely to explain the present invention's
Principle, and it cannot be construed to limiting the scope of the invention in any way, it is also only of the invention shown in attached drawing
One of embodiment, actual structure is not limited to this.Based on the explanation herein, those skilled in the art need not pay
Performing creative labour can associate other specific implementation modes of the present invention, these modes fall within the protection model of the present invention
Within enclosing.
Claims (3)
1. a kind of lightning protection circuit of Ethernet interface, including network transformer U1 and connection terminal J1, it is characterised in that：The network
The transmitting terminal of transformer U1 and the centre cap of receiving terminal pass through zener diode D2 and zener diode D1 ground connection respectively, send
Be connected between the centre cap at end and the centre cap of receiving terminal zener diode a D6, described zener diode D1, D2 and
D6 is for filtering common mode surge；5 short circuit of pin 4 and pin of the connection terminal J1, the pin 7 and pin 8 of connection terminal J1
Short circuit, one end of 5 short circuit of pin 4 and pin of the connection terminal J1 is by a zener diode D5 ground connection, the connecting pin
By a zener diode D4 ground connection, the pin 4 and pin 5 of connection terminal J1 is short for one end of 8 short circuit of pin 7 and pin of sub- J1
The one end connect and one end of 8 short circuit of pin 7 and pin are connected with zener diode a D3, described zener diode D3, D4 and D5
For filtering differential mode surge；The transmitting terminal includes positive transmitting terminal and negative transmitting terminal, and positive transmitting terminal and negative transmitting terminal are separately connected
The pin 1 and pin 2 of connection terminal J1；The receiving terminal includes positive receiving terminal and negative receiving terminal, positive receiving terminal and negative receiving terminal
It is separately connected the pin 3 and pin 6 of connection terminal J1；
Wherein, the pin 1~8 of connection terminal J1 corresponds to cable interface A1~A8.
2. a kind of lightning protection circuit of Ethernet interface as described in claim 1, which is characterized in that the centre cap of the transmitting terminal
One end of resistance R2 and resistance R1 are separately connected with the centre cap of receiving terminal, the other end connection polar capacitor C2's of resistance R1
Cathode, resistance R2 other end connection polar capacitor C1 cathode, the anode of polar capacitor C1 and C2 passes through capacitance C3 ground connection,
Described polar capacitor C1, C2 and capacitance C3 are for being isolated surge current.
3. a kind of lightning protection circuit of Ethernet interface as described in claim 1, which is characterized in that the connection terminal J1 further includes
There are indicator light interface L1, L2, L3 and L4 and housing shroud interface M1, M2, M3 and M4, housing shroud interface M3 and the M4 short circuit
And it is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710126811.XA CN106655142B (en) | 2017-03-06 | 2017-03-06 | A kind of lightning protection circuit of Ethernet interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710126811.XA CN106655142B (en) | 2017-03-06 | 2017-03-06 | A kind of lightning protection circuit of Ethernet interface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106655142A CN106655142A (en) | 2017-05-10 |
| CN106655142B true CN106655142B (en) | 2018-11-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710126811.XA Active CN106655142B (en) | 2017-03-06 | 2017-03-06 | A kind of lightning protection circuit of Ethernet interface |
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| Country | Link |
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| CN (1) | CN106655142B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102290804A (en) * | 2010-06-17 | 2011-12-21 | 杭州华三通信技术有限公司 | Ethernet port circuit |
| CN202172267U (en) * | 2011-08-23 | 2012-03-21 | 瑞斯康达科技发展股份有限公司 | An Ethernet interface protection circuit |
| CN104145391B (en) * | 2012-02-15 | 2017-08-08 | 高通股份有限公司 | Surge protection for Differential Input/output interface |
| CN106058838A (en) * | 2016-08-11 | 2016-10-26 | 四川天邑康和通信股份有限公司 | Ethernet internet access surge protection circuit |
| CN206506293U (en) * | 2017-03-06 | 2017-09-19 | 深圳市同为数码科技股份有限公司 | A kind of lightning protection circuit of Ethernet interface |
-
2017
- 2017-03-06 CN CN201710126811.XA patent/CN106655142B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106655142A (en) | 2017-05-10 |
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