CN107565510A - A kind of circuit protecting device with excessively stream and over-voltage protecting function - Google Patents
A kind of circuit protecting device with excessively stream and over-voltage protecting function Download PDFInfo
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- CN107565510A CN107565510A CN201711023122.2A CN201711023122A CN107565510A CN 107565510 A CN107565510 A CN 107565510A CN 201711023122 A CN201711023122 A CN 201711023122A CN 107565510 A CN107565510 A CN 107565510A
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- excessively stream
- protection element
- circuit
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Abstract
The invention discloses a kind of circuit protecting device with excessively stream and over-voltage protecting function; it includes excessively stream and over-voltage protection element, two level over-voltage protection element, rear class functional circuit; wherein; described excessively stream and over-voltage protection element is connected in series with described rear class functional circuit, and described two level over-voltage protection element is connected in parallel between described excessively stream and over-voltage protection element and described rear class functional circuit.The present invention, particularly with high voltage, low-current case, can have more superior protective value in current anomaly or electric voltage exception in time voltage clamping in safe range and chopping current compared to traditional protection scheme.
Description
Technical field
The present invention relates to a kind of circuit protecting device with excessively stream and over-voltage protecting function, the circuit protecting device can be with
The timely chopping current in current anomaly or electric voltage exception.
Background technology
In telecommunication transmission system, because the distance that the communications cable is set up is generally all long, it can largely send out
The situation that raw power line surprisingly overlaps, when power line is directly taken on the communications cable due to fortuitous event, it is possible to can occur
Overcurrent, overvoltage phenomenon.Heavy current invading can threaten to the safety of the calculator room equipments such as distributing frame, data switching exchane, seriously
Shi Keneng can also trigger fire incident, cause serious consequence.So need protection location prevent the person and equipment by
The injury of electric current, overvoltage, protection location can be acted in overcurrent, overvoltage intrusion, and protection is provided to communication equipment.At present
The protection scheme of traditional route protection unit is the discrete PTC with positive temperature coefficient effect electrically discrete transient states in parallel
Suppress diode TVS, this protection scheme is in printed substrate（PCB）Upper area occupied is bigger, especially in some conditions
（High voltage, low current）The situation that over-voltage protection element burns can occur, trigger second accident.Integrated Protection Scheme for Transmission Line
It can prevent because over-voltage protection element burns the second accident of initiation, and discrete component can be made up well and be taken on PCB
The big deficiency of area.
The content of the invention
It is an object of the invention to：A kind of circuit protecting device with excessively stream and over-voltage protecting function is provided, so as to
Timely chopping current when current anomaly or electric voltage exception.
The object of the invention is realized by following proposal：A kind of circuit protecting device with excessively stream and over-voltage protecting function,
Including：One-level excessively stream and over-voltage protection element, two level over-voltage protection element, rear class functional circuit, wherein, described one-level excessively stream
And over-voltage protection element is electrically coupled with described rear class functional circuit and is connected, described two level over-voltage protection element is electrically in parallel
Between described excessively stream and over-voltage protection element and described rear class functional circuit.The present invention is different in current anomaly or voltage
Timely chopping current when often.Particularly with high voltage, low-current case, there is more superior guarantor compared to traditional protection scheme
Protect performance.
Described one-level excessively stream and over-voltage protection element are selected from the PTC-element with positive temperature coefficient effect and with overvoltage
The Transient Suppression Diode TVS of the defencive function combination of two or more.
Described two level over-voltage protection element is selected from Transient Suppression Diode TVS, gas with surge protection function and put
Fulgurite GDT, surge suppress IGCT TSS one or more combinations.
Described rear class functional circuit can be the one or more such as DC-DC conversion modules, signaling module, PWM module
Combination.
The present invention is advantageous in that：Can in current anomaly and electric voltage exception in time voltage clamping in safe range simultaneously
And chopping current, until failure is released from, so as to protect electronic equipment and circuit.
Brief description of the drawings
Fig. 1 is the Protection Scheme for Transmission Line schematic diagram for having in embodiment 1 excessively stream and over-voltage protecting function；
Fig. 2 is the Protection Scheme for Transmission Line schematic diagram for having in embodiment 2 excessively stream and over-voltage protecting function；
11 --- one-level excessively stream and over-voltage protection element；
12 --- two level over-voltage protection element；
13 --- rear class functional circuit；
14 --- there is the PTC-element of positive temperature coefficient effect；
15 --- Transient Suppression Diode TVS；
21 --- one-level excessively stream and over-voltage protection element；
22 --- two level over-voltage protection element；
23 --- rear class functional circuit；
24th, 26 --- there is the PTC-element one, two of positive temperature coefficient effect；
25 --- two-way Transient Suppression Diode TVS.
Embodiment
Below by way of specific embodiment, the present invention is described in further detail.
Embodiment 1
Fig. 1 is a kind of Protection Scheme for Transmission Line schematic diagram with excessively stream and over-voltage protecting function in the present invention.It includes one-level mistake
Stream and over-voltage protection element 11, two level over-voltage protection element 12, rear class functional circuit 13.The one-level excessively stream and overvoltage protection member
Part 11 includes PTC-element 14 and Transient Suppression Diode TVS 15 with positive temperature coefficient effect, and one-level excessively stream and overvoltage are protected
Protection element 11 is electrically coupled with rear class functional circuit 13 and is connected, two level over-voltage protection element 12 be electrically connected in parallel on one-level excessively stream and
Between over-voltage protection element 11 and rear class functional circuit 13.
Embodiment 2
Fig. 2 is a kind of Protection Scheme for Transmission Line schematic diagram with excessively stream and over-voltage protecting function in the present invention.It includes one-level mistake
Stream and over-voltage protection element 21, two level over-voltage protection element 22, rear class functional circuit 23.The one-level excessively stream and overvoltage protection member
Part 21 includes PTC-element one, 2 24,26 and two-way Transient Suppression Diode TVS 25 with positive temperature coefficient effect, one-level
Excessively stream and over-voltage protection element 21 are electrically coupled with rear class functional circuit 23 to be connected, and two level over-voltage protection element 22 is electrically connected in parallel on
Between one-level excessively stream and over-voltage protection element 21 and rear class functional circuit 23.
Claims (4)
- A kind of 1. circuit protecting device with excessively stream and over-voltage protecting function, it is characterised in that：Include excessively stream and overvoltage protection Element, two level over-voltage protection element, rear class functional circuit, described excessively stream and over-voltage protection element and described rear class function electricity Road is connected in series, and described two level over-voltage protection element is connected in parallel on described excessively stream and over-voltage protection element and described rear class work( Between energy circuit.
- 2. the circuit protecting device according to claim 1 with excessively stream and over-voltage protecting function, it is characterised in that described Excessively stream and over-voltage protection element is selected from PTC-element with positive temperature coefficient effect and the transient state with over-voltage protecting function presses down The diode TVS processed combination of two or more.
- 3. the circuit protecting device of excessively stream according to claim 1 and over-voltage protecting function, it is characterised in that described two Level over-voltage protection element is at least the Transient Suppression Diode TVS with over-voltage protecting function, gas-discharge tube GDT, surge suppression Combinations brake tube TSS one or more combinations.
- 4. the circuit protecting device according to claim 1 with excessively stream and over-voltage protecting function, it is characterised in that described Rear class functional circuit be one or more kinds of combinations in DC-DC conversion circuit, signal output apparatus, PWM output circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711023122.2A CN107565510A (en) | 2017-10-25 | 2017-10-25 | A kind of circuit protecting device with excessively stream and over-voltage protecting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711023122.2A CN107565510A (en) | 2017-10-25 | 2017-10-25 | A kind of circuit protecting device with excessively stream and over-voltage protecting function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107565510A true CN107565510A (en) | 2018-01-09 |
Family
ID=61031749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711023122.2A Pending CN107565510A (en) | 2017-10-25 | 2017-10-25 | A kind of circuit protecting device with excessively stream and over-voltage protecting function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107565510A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117220255A (en) * | 2023-11-07 | 2023-12-12 | 上海维安半导体有限公司 | Blocking type surge protector |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2252433Y (en) * | 1995-11-24 | 1997-04-16 | 买云 | Anti-overvoltage and overcurrent protector for telecommunication system |
| CN2538087Y (en) * | 2002-04-04 | 2003-02-26 | 江阴长江斯菲尔电力仪表有限公司 | Power overvoltage protective instrument circuit |
| CN1674386A (en) * | 2004-03-23 | 2005-09-28 | 华为技术有限公司 | Balanced line signal interface protection circuit |
| CN200950537Y (en) * | 2006-09-30 | 2007-09-19 | 华为技术有限公司 | Protective circuit |
| CN106486992A (en) * | 2015-08-27 | 2017-03-08 | 中兴通讯股份有限公司 | A kind of interface protective circuit with oscillating characteristic and method |
| CN107221914A (en) * | 2016-03-22 | 2017-09-29 | 董海龙 | Circuit overvoltage, overcurrent and superheat is protected |
-
2017
- 2017-10-25 CN CN201711023122.2A patent/CN107565510A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2252433Y (en) * | 1995-11-24 | 1997-04-16 | 买云 | Anti-overvoltage and overcurrent protector for telecommunication system |
| CN2538087Y (en) * | 2002-04-04 | 2003-02-26 | 江阴长江斯菲尔电力仪表有限公司 | Power overvoltage protective instrument circuit |
| CN1674386A (en) * | 2004-03-23 | 2005-09-28 | 华为技术有限公司 | Balanced line signal interface protection circuit |
| CN200950537Y (en) * | 2006-09-30 | 2007-09-19 | 华为技术有限公司 | Protective circuit |
| CN106486992A (en) * | 2015-08-27 | 2017-03-08 | 中兴通讯股份有限公司 | A kind of interface protective circuit with oscillating characteristic and method |
| CN107221914A (en) * | 2016-03-22 | 2017-09-29 | 董海龙 | Circuit overvoltage, overcurrent and superheat is protected |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117220255A (en) * | 2023-11-07 | 2023-12-12 | 上海维安半导体有限公司 | Blocking type surge protector |
| CN117220255B (en) * | 2023-11-07 | 2024-04-05 | 上海维安半导体有限公司 | Blocking type surge protector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 200083 806, floor 8, No. 125, Liuying Road, Hongkou District, Shanghai Applicant after: Shanghai Wei'an Electronic Co.,Ltd. Address before: Seven road 201202 Shanghai Pudong New Area Shiwan No. 1001 Applicant before: Shanghai Changyuan Wayon Circuit Protection Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: Room 806, 8th floor, 125 Liuying Road, Hongkou District, Shanghai 200083 Applicant after: Shanghai Weian Electronics Co.,Ltd. Address before: 806, 8th floor, 125 Liuying Road, Hongkou District, Shanghai 200083 Applicant before: Shanghai Wei'an Electronic Co.,Ltd. |
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| CB02 | Change of applicant information |