CN201036096Y - Composite type positive temperature coefficient thermal resistance - Google Patents
Composite type positive temperature coefficient thermal resistance Download PDFInfo
- Publication number
- CN201036096Y CN201036096Y CNU2007200493714U CN200720049371U CN201036096Y CN 201036096 Y CN201036096 Y CN 201036096Y CN U2007200493714 U CNU2007200493714 U CN U2007200493714U CN 200720049371 U CN200720049371 U CN 200720049371U CN 201036096 Y CN201036096 Y CN 201036096Y
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- Prior art keywords
- temperature coefficient
- resistance
- piezo
- positive temperature
- semistor
- Prior art date
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- 239000002131 composite material Substances 0.000 title abstract 3
- 150000001875 compounds Chemical class 0.000 claims description 11
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 abstract description 4
- 238000010168 coupling process Methods 0.000 abstract description 4
- 238000005859 coupling reaction Methods 0.000 abstract description 4
- 229910000679 solder Inorganic materials 0.000 abstract 2
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 4
- 230000006698 induction Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 241000220317 Rosa Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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- Thermistors And Varistors (AREA)
Abstract
The utility model discloses a composite positive-temperature coefficient thermistor which comprises a positive-temperature coefficient thermistor and a varistor. An electrode on one side of the positive-temperature coefficient thermistor is welded by solder or bonded by conductive paste with the electrode on one side of the varistor to form a common end which is led out through a pin; the other pin of the positive-temperature coefficient thermistor and the other pin of the varistor are respectively led out; the positive-temperature coefficient thermistor and the varistor are positioned in an encapsulated layer; the positive-temperature coefficient thermistor and the varistor are welded by the solder or bonded by the conductive paste together. The composite positive-temperature coefficient thermistor can effectively protect the varistor, and the varistor can enhance the protecting speed of the positive-temperature coefficient thermistor by thermally coupling of the overvoltage condition.
Description
Technical field
The utility model relates to a kind of electronic devices and components that are used for protective circuit, particularly relates to a kind of compound semistor.
Background technology
Do in the circuit of resettable fuse at positive temperature coefficient (PTC) thermistor; because the reason of the rated operational current that must consider positive temperature coefficient (PTC) thermistor operate as normal under high ambient temperature and maximum operating voltage; overvoltage condition does not reach due protection effect usually when normal temperature or low temperature.Protected the slow or clear-cut probability that causes fault of not protecting to increase.For same power circuit, the transformer producer of use is different, and the thermistor of being matched is also different, the possibility that just exists a kind of mistake protection or overvoltage not to protect between careless slightly like this thermistor and the transformer.
Simultaneously, piezo-resistance is because excellent nonlinear characteristic is applied to absorb in the various electronic circuits lightning induction pulse, transient overvoltage etc.But, various abnormal causes lost efficacy even blast on fire because often causing varistor.In order to address this problem, designers have to often consider to improve the pressure sensitive voltage and the diameter of piezo-resistance, absorb the protection range of overvoltage surge but so reduced varistor to a certain extent, and have increased use cost.
1 is positive temperature coefficient (PTC) thermistor among Fig. 1, Fig. 2, Fig. 3, and 2 is piezo-resistance.
As shown in Figure 1, selected the piezo-resistance of large-size piezo-resistance or higher pressure sensitive voltage for use, increased use cost or reduced the result of use that absorbs the surge overvoltage protection in order to prevent the pressure responsive resistor failure explosion.
As shown in Figure 2, the piezo-resistance (being generally the 50%-70% of last pressure sensitive voltage) that in late-class circuit, has added low pressure-sensitive voltage for the influence that effectively reduces lightning induction pulse or transient overvoltage by piezo-resistance.Though this scheme can play the effect of current/voltage join protection, reduce the influence of residual voltage preferably to protected circuit, more often can be because of the untimely pressure responsive resistor failure that makes low pressure-sensitive voltage of positive temperature coefficient (PTC) thermistor reaction.
As shown in Figure 3; when pressure sensitive voltage is selected when higher; reduce the result of use that absorbs the surge overvoltage protection, when pressure sensitive voltage was selected to hang down, can often face the problem of pressure responsive resistor failure, and positive temperature coefficient (PTC) thermistor can face the danger that rush of current lost efficacy.
Summary of the invention
The purpose of this utility model is to provide a kind of compound semistor, and it can effectively absorb surge, absorb overvoltage, and the protection range of reaction speed and broad electric current is faster arranged, and plays good circuit protection function.
In order to address the above problem, the technical solution adopted in the utility model comprises: a kind of compound semistor, comprise semistor and piezo-resistance, an electrode of described semistor and an electrode of piezo-resistance link together, form common port, draw by pin; The another pin of described semistor and the another pin of piezo-resistance are drawn separately respectively.
Technical solution adopted in the utility model also comprises: described semistor and piezo-resistance are positioned at encapsulated layer.
Technical solution adopted in the utility model also comprises: described semistor and piezo-resistance weld together by scolding tin.
Technical solution adopted in the utility model also comprises: described semistor and piezo-resistance bond together by electrocondution slurry.
Useful technique effect of the present utility model is: this compound semistor adopts a semistor and a piezo-resistance welding or a bonding and is packaged together, electric current and temperature when utilizing piezo-resistance overvoltage response make positive temperature coefficient (PTC) thermistor fast in any environment for use temperature protection speed, and conversely piezo-resistance are protected; When utilizing positive temperature coefficient (PTC) thermistor and piezo-resistance thermal coupling, the integrated protection effect of current/voltage improves the protection speed of positive temperature coefficient (PTC) thermistor to greatest extent, all can select for use same kind of thermistor to realize protection at this rated operational current with all interior protected circuit; The pressure sensitive voltage that can reduce piezo-resistance simultaneously under the prerequisite of not only heart piezo-resistance overvoltage damage to greatest extent increases circuit and absorbs surge, absorbs the protection effect of overvoltage.
Description of drawings
Fig. 1 is first kind of protective circuit schematic diagram in the prior art;
Fig. 2 is second kind of protective circuit schematic diagram in the prior art;
Fig. 3 is the third protective circuit schematic diagram in the prior art;
Fig. 4 is the end view of compound semistor;
Fig. 5 is the schematic diagram of positive temperature coefficient (PTC) thermistor or piezo-resistance.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the utility model is further described.
As shown in Figure 4, a kind of compound positive temperature coefficient (PTC) thermistor comprises positive temperature coefficient (PTC) thermistor 3 and piezo-resistance 4, wherein an electrode of electrode of positive temperature coefficient (PTC) thermistor 3 and piezo-resistance 4 is connected as a single entity, form common port, draw by pin 7, the another pin of positive temperature coefficient (PTC) thermistor 3 and piezo-resistance 4 is drawn separately respectively, form two pins 6 and 5, thereby form three terminal device as shown in Figure 4 with a common port.Wherein, positive temperature coefficient (PTC) thermistor 3 and piezo-resistance 4 bond together by scolding tin welding or electrocondution slurry, and use encapsulated layer that it is encapsulated.
Wherein the main feature of positive temperature coefficient (PTC) thermistor 3 is that its resistance can raise along with the rising of temperature, and when temperature surpassed its Curie point, resistance value sharply rose; The main feature of piezo-resistance 4 is when the voltage that puts on its two ends is elevated to its pressure sensitive voltage, and piezo-resistance 4 transfers state near conducting to by off state, and the electric current that resistance sharply reduces to flow through increases simultaneous temperature rapidly and sharply raises.
After positive temperature coefficient (PTC) thermistor 3 and piezo-resistance 4 are packaged together; the electric current that flows through positive temperature coefficient (PTC) thermistor 3 during operate as normal is the normal load current of protected circuit, also is the rated operational current of positive temperature coefficient (PTC) thermistor 3.This moment is because voltage is lower than the pressure sensitive voltage of piezo-resistance 4, piezo-resistance 4 is off state, do not have electric current to flow through positive temperature coefficient (PTC) thermistor 3 by piezo-resistance 4, do not change substantially at the rated operational current scope internal resistance value of positive temperature coefficient PTC thermistor.During overvoltage condition, be applied to the voltage of protected circuit because by piezo-resistance 4 clamps, the load current that flows through it changes little.But because the nonlinear characteristic of piezo-resistance 4 excellences; piezo-resistance 4 presents conducting state sharply increases the electric current that flows through piezo-resistance 4; one side piezo-resistance 4 is given positive temperature coefficient (PTC) thermistor 3 because of absorbing the big also thermal coupling that heats up rapidly of energy; on the other hand; piezo-resistance 4 is conducting state; the electric current that flows through also makes positive temperature coefficient (PTC) thermistor 3 self owing to [I*I*R*t] quickening that heats up; make its temperature surpass Curie temperature; electric current sharply reduced when positive temperature coefficient (PTC) thermistor 3 resistances increased sharply; piezo-resistance 4 has only less leakage current to pass through, and reaches the purpose of protection piezo-resistance 4.Simultaneously; when utilizing positive temperature coefficient (PTC) thermistor 3 with piezo-resistance 4 thermal couplings; the integrated protection effect of current/voltage improves the protection speed of positive temperature coefficient (PTC) thermistor 3 to greatest extent; all can select for use same kind of positive temperature coefficient (PTC) thermistor 3 to realize protection at this rated operational current with all interior protected circuit; simultaneously; the pressure sensitive voltage that can reduce piezo-resistance 4 under the prerequisite of not worrying piezo-resistance 4 overvoltages damage to greatest extent increases circuit and absorbs surge, absorbs the protection effect of overvoltage.
Fig. 5 is the schematic diagram of positive temperature coefficient (PTC) thermistor or piezo-resistance, comprises two pins 8.
The above is preferred embodiment of the present utility model only, is not to be used to limit protection range of the present utility model.Anyly be familiar with those skilled in the art in the technical scope that the utility model discloses, the variation that can expect easily all should be encompassed within the protection range of the present utility model.
Claims (4)
1. compound semistor, it is characterized in that: comprise semistor (3) and piezo-resistance (4), an electrode of described semistor (3) and an electrode of piezo-resistance (4) link together, form common port, draw by pin (7); The another pin (5) of described semistor (3) is drawn separately respectively with the another pin (6) of piezo-resistance (4).
2. a kind of compound semistor as claimed in claim 1 is characterized in that: described semistor (3) and piezo-resistance (4) are positioned at encapsulated layer.
3. a kind of compound semistor as claimed in claim 2 is characterized in that: described semistor (3) welds together by scolding tin with piezo-resistance (4).
4. a kind of compound semistor as claimed in claim 2 is characterized in that: described semistor (3) bonds together by electrocondution slurry with piezo-resistance (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200493714U CN201036096Y (en) | 2007-03-19 | 2007-03-19 | Composite type positive temperature coefficient thermal resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200493714U CN201036096Y (en) | 2007-03-19 | 2007-03-19 | Composite type positive temperature coefficient thermal resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201036096Y true CN201036096Y (en) | 2008-03-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200493714U Ceased CN201036096Y (en) | 2007-03-19 | 2007-03-19 | Composite type positive temperature coefficient thermal resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201036096Y (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751707A (en) * | 2012-07-13 | 2012-10-24 | 深圳市劲阳电子有限公司 | Overcurrent and overvoltage protector with bimetallic strip temperature switch |
| CN103311914A (en) * | 2013-05-31 | 2013-09-18 | 深圳市劲阳电子有限公司 | Overvoltage production circuit of composite type piezoresistor |
| CN103311916A (en) * | 2013-06-28 | 2013-09-18 | 华南理工大学 | Thunder-prevention overvoltage protection device |
| CN103580014A (en) * | 2012-07-26 | 2014-02-12 | 中兴通讯股份有限公司 | Lightning protection device |
| CN104103391A (en) * | 2014-08-01 | 2014-10-15 | 贵州凯里经济开发区中昊电子有限公司 | Method adopting stereoscopic metal belt technology for producing thermal pressure-sensitive resistor and products thereof |
| CN105092076A (en) * | 2014-05-17 | 2015-11-25 | 张金水 | Ultrahigh precision digital thermometric indicator replacing precise mercury thermometer |
| CN105186477A (en) * | 2015-09-24 | 2015-12-23 | 湖南劲阳电子有限公司 | Overvoltage and overcurrent protection circuit |
| CN105186476A (en) * | 2015-09-24 | 2015-12-23 | 湖南劲阳电子有限公司 | Overvoltage and overcurrent protection circuit |
| CN106291017A (en) * | 2016-08-10 | 2017-01-04 | 浙江恒业电子有限公司 | Electric energy meter front end power protecting circuit |
| CN110336264A (en) * | 2019-08-22 | 2019-10-15 | 成都铁达电子股份有限公司 | A kind of pressure limiting circuit |
| CN110491610A (en) * | 2018-05-15 | 2019-11-22 | 富致科技股份有限公司 | Combined type electric line protection device |
| CN112837874A (en) * | 2021-01-29 | 2021-05-25 | 深圳市劲阳电子有限公司 | A combined composite PTC thermistor |
| CN115775664A (en) * | 2021-09-09 | 2023-03-10 | 上海三思电子工程有限公司 | A composite thermistor |
-
2007
- 2007-03-19 CN CNU2007200493714U patent/CN201036096Y/en not_active Ceased
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751707A (en) * | 2012-07-13 | 2012-10-24 | 深圳市劲阳电子有限公司 | Overcurrent and overvoltage protector with bimetallic strip temperature switch |
| CN103580014A (en) * | 2012-07-26 | 2014-02-12 | 中兴通讯股份有限公司 | Lightning protection device |
| CN103580014B (en) * | 2012-07-26 | 2017-07-14 | 中兴通讯股份有限公司 | A kind of lightning protection device |
| CN103311914A (en) * | 2013-05-31 | 2013-09-18 | 深圳市劲阳电子有限公司 | Overvoltage production circuit of composite type piezoresistor |
| CN103311916A (en) * | 2013-06-28 | 2013-09-18 | 华南理工大学 | Thunder-prevention overvoltage protection device |
| CN105092076A (en) * | 2014-05-17 | 2015-11-25 | 张金水 | Ultrahigh precision digital thermometric indicator replacing precise mercury thermometer |
| CN104103391B (en) * | 2014-08-01 | 2017-07-11 | 贵州凯里经济开发区中昊电子有限公司 | Using the method for stereo metal with technique productions hot pressing sensitive resistor and products thereof |
| CN104103391A (en) * | 2014-08-01 | 2014-10-15 | 贵州凯里经济开发区中昊电子有限公司 | Method adopting stereoscopic metal belt technology for producing thermal pressure-sensitive resistor and products thereof |
| CN105186476B (en) * | 2015-09-24 | 2019-04-16 | 湖南劲阳电子有限公司 | A kind of over-voltage over-current protection circuit |
| CN105186476A (en) * | 2015-09-24 | 2015-12-23 | 湖南劲阳电子有限公司 | Overvoltage and overcurrent protection circuit |
| CN105186477B (en) * | 2015-09-24 | 2019-02-05 | 湖南劲阳电子有限公司 | Over-voltage over-current protection circuit |
| CN105186477A (en) * | 2015-09-24 | 2015-12-23 | 湖南劲阳电子有限公司 | Overvoltage and overcurrent protection circuit |
| CN106291017A (en) * | 2016-08-10 | 2017-01-04 | 浙江恒业电子有限公司 | Electric energy meter front end power protecting circuit |
| CN110491610A (en) * | 2018-05-15 | 2019-11-22 | 富致科技股份有限公司 | Combined type electric line protection device |
| CN110491610B (en) * | 2018-05-15 | 2021-06-18 | 富致科技股份有限公司 | Composite circuit protection device |
| CN110336264A (en) * | 2019-08-22 | 2019-10-15 | 成都铁达电子股份有限公司 | A kind of pressure limiting circuit |
| CN110336264B (en) * | 2019-08-22 | 2024-01-26 | 成都铁达电子股份有限公司 | Voltage limiting circuit |
| CN112837874A (en) * | 2021-01-29 | 2021-05-25 | 深圳市劲阳电子有限公司 | A combined composite PTC thermistor |
| CN115775664A (en) * | 2021-09-09 | 2023-03-10 | 上海三思电子工程有限公司 | A composite thermistor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Su Yongdi Document name: Document transfer advice |
|
| C35 | Partial or whole invalidation of patent or utility model | ||
| IW01 | Full invalidation of patent right |
Decision date of declaring invalidation: 20130219 Decision number of declaring invalidation: 20054 Granted publication date: 20080312 |