CN107221914A - Circuit overvoltage, overcurrent and superheat is protected - Google Patents
Circuit overvoltage, overcurrent and superheat is protected Download PDFInfo
- Publication number
- CN107221914A CN107221914A CN201610162871.2A CN201610162871A CN107221914A CN 107221914 A CN107221914 A CN 107221914A CN 201610162871 A CN201610162871 A CN 201610162871A CN 107221914 A CN107221914 A CN 107221914A
- Authority
- CN
- China
- Prior art keywords
- overcurrent
- overvoltage
- transient suppression
- tvs transient
- resettable fuse
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
- H02H7/222—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices for switches
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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
-
- 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
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
-
- 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
- H02H9/042—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage comprising means to limit the absorbed power or indicate damaged over-voltage protection device
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
Abstract
The present invention discloses the scheme of two kinds of circuit overvoltage, overcurrent and superheat protections, the purpose is to overcome electronic product encounter in use the over-pressed time it is longer when, protection circuit because resettable fuse also has little time to do overcurrent protection and TVS Transient Suppression Diodes are but because excessively stream makes the too high phenomenon for causing to overheat and damaging of power consumption, the first technical scheme includes resettable fuse, TVS Transient Suppression Diodes, the circuit board of metal material, second technical scheme it include resettable fuse and TVS Transient Suppression Diodes, the principle of two kinds of technical schemes is that the partial heat part for allowing TVS Transient Suppression Diodes to be produced in overvoltage sheds, another part, which passes to resettable fuse, makes its resistive protect TVS Transient Suppression Diodes to play the protection to whole circuit, in summary feature makes the protection of circuit overvoltage, overcurrent and superheat i.e. simple and practical.
Description
Technical field
It is specifically the protection of circuit overvoltage, overcurrent and superheat the present invention relates to electronic circuit field.
Background technology
Current electronic product is in use; often can encounter circuit overvoltage, excessively stream, overheat situation and product is not run; generally using power input series connection resettable fuse and parallel connection TVS Transient Suppression Diodes are protected behind; but when the overvoltage time is longer; often resettable fuse also have little time to do overcurrent protection and TVS Transient Suppression Diodes because excessively stream makes that power consumption is too high to be caused to overheat and damage so that product can not be run.Also the protection for thering are some to add other elements on this basis and generating, but because construction is complicated or cost be too high to it is general.
The content of the invention
The mesh of the present invention：Two kinds of circuit overvoltage, overcurrent and superheat protection schemes are proposed, solve the problems, such as that TVS Transient Suppression Diodes caused by overvoltage cross cause thermal damage for a long time in simple and practical mode.
The first technical scheme of the present invention：It is a kind of overvoltage, overcurrent and superheat protection circuit; it includes resettable fuse, TVS Transient Suppression Diodes, the circuit board of metal material; the resettable fuse is connected on power input and then parallel connection TVS Transient Suppression Diodes, and resettable fuse and the TVS Transient Suppression Diode is all welded on the circuit board of metal material.
The resettable fuse encapsulates for SMD pasters.
The TVS Transient Suppression Diodes encapsulate for SMD pasters.
Pad spacing≤20mm of the resettable fuse and TVS Transient Suppression Diodes.
The circuit board of the metal material is made up of aluminium base.
Second of technical scheme of the present invention：It is a kind of circuit overvoltage, overcurrent and superheat protection element; it includes resettable fuse and TVS Transient Suppression Diodes; the resettable fuse is connected on power input and then parallel connection TVS Transient Suppression Diodes, and resettable fuse and the TVS Transient Suppression Diode is encapsulated in same housing and generates a kind of circuit overvoltage, overcurrent and superheat protection element.
The overvoltage, overcurrent and superheat protection element encapsulates for SMD pasters.
The overvoltage, overcurrent and superheat protection element has 1 power input pin, 1 power supply output pin, 1 GND grounding pin.
The GND grounding pins are radiating pin.
Beneficial effects of the present invention：The cost of circuit overvoltage, overcurrent and superheat protection is reduced, and effectively prevents the TVS Transient Suppression Diodes over-pressed time from being damaged caused by longer, and it is simple and practical.
Embodiment
The circuit overvoltage, overcurrent and superheat protection of the present invention is characterised by:The partial heat moment for allowing TVS Transient Suppression Diodes to be produced in overvoltage passes to resettable fuse, so that resettable fuse it is affected by temperature and shorten produce resistive time, both TVS Transient Suppression Diodes there will be no the over-pressed time it is long the problem of.On the other hand, because the function of TVS Transient Suppression Diodes encapsulates for SMD pasters, a part of heat can be made effectively to shed to circuit board.Thus the over-pressed time length and heat dissipation problem of TVS Transient Suppression Diodes are solved, so as to effectively protect TVS Transient Suppression Diodes, and reliable and stable circuit overvoltage, overcurrent and superheat protection is realized.
The implementation of the first technical scheme：It is that power input and then parallel connection TVS Transient Suppression Diodes are connected on by resettable fuse, resettable fuse and the TVS Transient Suppression Diode is all welded on the circuit board of metal material.When TVS Transient Suppression Diodes are over-pressed, a heat part passes to resettable fuse by metallic circuit makes its express delivery resistive, and another part is shed by metallic circuit.Protect and realize that circuit overvoltage, overcurrent and superheat is protected so as to be realized to TVS Transient Suppression Diodes.
The implementation of second of technical scheme：It is that power input and then parallel connection TVS Transient Suppression Diodes are connected on by resettable fuse, it is interior and generate a kind of oversampling circuit and press through and flow through thermal protective element that resettable fuse and the TVS Transient Suppression Diode is encapsulated in same housing.When TVS Transient Suppression Diodes are over-pressed, heat moment, which passes to resettable fuse, makes its express delivery resistive, and another part is shed by metallic circuit.Protect and realize that circuit overvoltage, overcurrent and superheat is protected so as to be realized to TVS Transient Suppression Diodes.
The present invention does not limit to above-mentioned preferred forms, and anyone can draw other various forms of circuit overvoltage, overcurrent and superheat protections under the enlightenment of the present invention.All equivalent changes and modifications done according to scope of the present invention patent, should all belong to the covering scope of the present invention.
Claims (9)
1. a kind of overvoltage, overcurrent and superheat protection circuit; it includes resettable fuse, TVS Transient Suppression Diodes, the circuit board of metal material; the resettable fuse is connected on power input and then parallel connection TVS Transient Suppression Diodes, and resettable fuse and the TVS Transient Suppression Diode is all welded on the circuit board of metal material.
2. overvoltage, overcurrent and superheat protection circuit according to claim 1, it is characterised in that：The resettable fuse encapsulates for SMD pasters.
3. overvoltage, overcurrent and superheat protection circuit according to claim 1, it is characterised in that：The TVS Transient Suppression Diodes encapsulate for SMD pasters.
4. overvoltage, overcurrent and superheat protection circuit according to claim 1 or 2, it is characterised in that：Pad spacing≤20mm of the resettable fuse and TVS Transient Suppression Diodes.
5. overvoltage, overcurrent and superheat protection circuit according to claim 1, it is characterised in that：The circuit board of the metal material is made up of aluminium base.
6. a kind of circuit overvoltage, overcurrent and superheat protection element; it includes resettable fuse and TVS Transient Suppression Diodes; the resettable fuse is connected on power input and then parallel connection TVS Transient Suppression Diodes, and resettable fuse and the TVS Transient Suppression Diode is encapsulated in same housing and generates a kind of circuit overvoltage, overcurrent and superheat protection element.
7. overvoltage, overcurrent and superheat protection element according to claim 6, it is characterised in that：The overvoltage, overcurrent and superheat protection element encapsulates for SMD pasters.
8. overvoltage, overcurrent and superheat protection circuit according to claim 6, it is characterised in that：The overvoltage, overcurrent and superheat protection element has 1 power input pin, 1 power supply output pin, 1 GND grounding pin.
9. overvoltage, overcurrent and superheat protection element according to claim 8, it is characterised in that：The GND grounding pins are radiating pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610162871.2A CN107221914A (en) | 2016-03-22 | 2016-03-22 | Circuit overvoltage, overcurrent and superheat is protected |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610162871.2A CN107221914A (en) | 2016-03-22 | 2016-03-22 | Circuit overvoltage, overcurrent and superheat is protected |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107221914A true CN107221914A (en) | 2017-09-29 |
Family
ID=59927976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610162871.2A Pending CN107221914A (en) | 2016-03-22 | 2016-03-22 | Circuit overvoltage, overcurrent and superheat is protected |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107221914A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107565510A (en) * | 2017-10-25 | 2018-01-09 | 上海长园维安电子线路保护有限公司 | A kind of circuit protecting device with excessively stream and over-voltage protecting function |
| CN110567527A (en) * | 2019-09-26 | 2019-12-13 | 武汉松野智能仪表有限公司 | Pressure temperature transmitter circuit based on NB-IoT wireless transmission |
| CN114441026A (en) * | 2022-04-11 | 2022-05-06 | 深圳市杰曼科技股份有限公司 | Switching value three-state output circuit of weighing instrument |
-
2016
- 2016-03-22 CN CN201610162871.2A patent/CN107221914A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107565510A (en) * | 2017-10-25 | 2018-01-09 | 上海长园维安电子线路保护有限公司 | A kind of circuit protecting device with excessively stream and over-voltage protecting function |
| CN110567527A (en) * | 2019-09-26 | 2019-12-13 | 武汉松野智能仪表有限公司 | Pressure temperature transmitter circuit based on NB-IoT wireless transmission |
| CN114441026A (en) * | 2022-04-11 | 2022-05-06 | 深圳市杰曼科技股份有限公司 | Switching value three-state output circuit of weighing instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170929 |
|
| WD01 | Invention patent application deemed withdrawn after publication |