CN201886853U - Three-terminal protecting element synthesized by negative temperature coefficient (NTC) thermistor and piezoresistor - Google Patents
Three-terminal protecting element synthesized by negative temperature coefficient (NTC) thermistor and piezoresistor Download PDFInfo
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- CN201886853U CN201886853U CN2010206384036U CN201020638403U CN201886853U CN 201886853 U CN201886853 U CN 201886853U CN 2010206384036 U CN2010206384036 U CN 2010206384036U CN 201020638403 U CN201020638403 U CN 201020638403U CN 201886853 U CN201886853 U CN 201886853U
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Abstract
The utility model discloses a three-terminal protecting element synthesized by a negative temperature coefficient (NTC) thermistor and a piezoresistor, which comprises the piezoresistor, the NTC thermistor, a first lead pin, a second lead pin, a third lead pin and an epoxy resin layer, wherein the first lead pin, the second lead pin and the third lead pin are respectively provided with a connecting part and a conducting part which are electrically conducted, and the piezoresistor, the NTC thermistor, the connecting part of the first lead pin, the connecting part of the second lead pin and the connecting part of the third lead pin are all placed in the cured epoxy resin layer. The three-terminal protecting element disclosed by the utility model has the advantages that the piezoresistor and the NTC thermistor are encapsulated into a three-terminal device by epoxy resin, the overvoltage and overcurrent protecting functions of the piezoresistor and the NTC thermistor are integrated, in addition, the tendency of miniaturization and light weight of electronic elements can be met.
Description
Technical field
The utility model relates to electronic applications, relates in particular to the synthetic three-terminal protection element of a kind of NTC thermistor and piezo-resistance.
Background technology
Varistor (VSR) is the abbreviation of voltage-sensitive resistor, and it is a kind of novel over-voltage protection element.The core material that constitutes piezo-resistance is a zinc oxide, zinc oxide comprises the grain boundary layer around zinc oxide grain and the crystal grain again, the resistivity of zinc oxide grain is very low, and grain boundary layer resistivity is very high, contacted two intergranules form a potential barrier that is equivalent to Zener diode, become a piezo-resistance unit, many resistance units compose in parallel the varistor matrix by series connection.Varistor is when work, surge energy is all born in each piezo-resistance unit, and these piezo-resistance unit are to be evenly distributed on substantially in the whole resistance, just whole resistance is all born energy, and be that electrical power is born in the interface unlike Zener two utmost point voltage-stabiliser tubes, Here it is, and the ceramic varistor utensil has than the very large through-flow and energy of Duoing of Zener two utmost point voltage-stabiliser tubes reason by norm.The resistance value of varistor changes with terminal voltage, can constitute overvoltage crowbar.
NTC thermistor (negative tempperature coefficient thermistor) is a kind of semiconductor resistor of tool temperature sensitivity, is meant with temperature rising resistance to be the thermistor that exponential relationship reduces, has negative temperature coefficient.
Existing varistor (VSR) and NTC thermistor generally are separately to use as resolution element, and the ceramic packaging form is all adopted in the encapsulation of these two kinds of resistors, because the quality of pottery self is bigger, bigger with the element individuality after the ceramic packaging, require today of more and more miniaturization at integrated circuit, have serious defective.
The utility model content
The technical problem that the utility model mainly solves provides and a kind of varistor (VSR) and NTC thermistor is synthesized a kind of three-terminal element; this three-terminal element not only has overvoltage protection characteristic and overcurrent protection characteristic, and has the advantage of lightness and miniaturization encapsulation.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: provide a kind of NTC thermistor and piezo-resistance synthetic three-terminal protection element, comprise piezo-resistance, NTC thermistor, first pin, second pin, the 3rd pin and epoxy resin layer, described first pin, second pin and the 3rd pin all have connecting portion and conductive part, and described connecting portion and conductive part conduct; First end of described piezo-resistance is electrically connected with the connecting portion of first pin, second end of described piezo-resistance is electrically connected with the connecting portion of second pin, first end of described NTC thermistor is electrically connected with the connecting portion of second pin, and second end of described NTC thermistor is electrically connected with the connecting portion of the 3rd pin; The linking part of the linking part of described piezo-resistance, NTC thermistor, first pin, the linking part of second pin, the 3rd pin all places in the epoxy resin layer of curing.
Wherein, described piezo-resistance is Zinc-oxide piezoresistor or silicon-carbide varistor.
Wherein, described NTC thermistor is NTC ceramic thermal resistance or NTC organic polymer thermistor.
Wherein, described first pin, second pin and the 3rd pin are zinc-plated pin.
The beneficial effects of the utility model are: the resolution element that is different from prior art adopts ceramic packaging can not satisfy the trend of electronic component miniaturization lightness; the utility model becomes one three end member device with the NTC thermistor with epoxy encapsulation with piezo-resistance; the function of integrated piezo-resistance and overvoltage of NTC thermistor and overcurrent protection, and can satisfy the trend of electronic component miniaturization lightness.
Further, use in the electronic equipment of the present utility model, by three-terminal element connection device power input, the high voltage pulse of the lightning voltage that can import the electronic equipment power source end effectively, electric spark high pressure, unknown cause provides the low resistance discharge channel, can prevent the damage of various high pressure or overcurrent electronic equipment main body circuit.
Description of drawings
Fig. 1 is the circuit diagram of the utility model NTC thermistor and the synthetic three-terminal element embodiment of piezo-resistance;
Fig. 2 is the application circuit of the utility model NTC thermistor and the synthetic three-terminal element embodiment of piezo-resistance.
Embodiment
By describing technology contents of the present utility model, structural feature in detail, realized purpose and effect, give explanation below in conjunction with execution mode and conjunction with figs. are detailed.
The NTC thermistor is the thermistor of negative temperature coefficient, and its resistance reduces with the rising of temperature.
See also Fig. 1, the three-terminal protection element that the utility model NTC thermistor and piezo-resistance are synthetic, comprise piezo-resistance MY, NTC thermistor, first pin 1, second pin 2, the 3rd pin 3 and epoxy resin layer, described first pin, second pin and the 3rd pin all have connecting portion and conductive part, and described connecting portion and conductive part conduct; First end of described piezo-resistance MY is electrically connected with the connecting portion of first pin 1, second end of described piezo-resistance MY is electrically connected with the connecting portion of second pin 2, first end of described NTC thermistor is electrically connected with the connecting portion of second pin 2, and second end of described NTC thermistor is electrically connected with the connecting portion of the 3rd pin 3; The linking part of the linking part of described piezo-resistance MY, NTC thermistor, first pin, the linking part of second pin, the 3rd pin all places in the epoxy resin layer of curing.
The resolution element that is different from prior art adopts ceramic packaging can not satisfy the trend of electronic component miniaturization lightness; the utility model becomes one three end member device with the NTC thermistor with epoxy encapsulation with piezo-resistance; the function of integrated piezo-resistance and overvoltage of NTC thermistor and overcurrent protection, and can satisfy the trend of electronic component miniaturization lightness.
Referring to Fig. 2, use in the electronic equipment of the present utility model, by three-terminal element connection device power input, the high voltage pulse of the lightning voltage that can import the electronic equipment power source end effectively, electric spark high pressure, unknown cause provides the low resistance discharge channel, can prevent the damage of various high pressure or overcurrent electronic equipment main body circuit.
Operation principle of the present utility model is: NTC is the thermistor of negative temperature coefficient, it during normal temperature high-resistance state, when when start or when having surge current to flow through NTC, NTC is because of flowing through the electric current heating, and make the resistance step-down, circuit enters normal operating conditions, closes electricity back NTC and will revert to initial condition automatically; Piezo-resistance is in high-impedance state usually, seal in circuit as thunder and lightning or not clear high voltage, when being higher than the voltage of design, piezo-resistance is finished to various high pressure the low resistance discharge channel is provided, prevent that high voltage, big electric current from sealing in circuit, to damage of circuit, after removing high pressure, piezo-resistance reverts to high-impedance state automatically; After the combination, above-mentioned functions will be finished simultaneously.
In one embodiment, described piezo-resistance is Zinc-oxide piezoresistor or silicon-carbide varistor.
In one embodiment, described NTC thermistor is NTC ceramic thermal resistance or NTC organic polymer thermistor.
In one embodiment, described first pin, second pin and the 3rd pin are zinc-plated pin.
The utility model can prevent the lightning surge electric current, the damage of surge current to power supply circuits and electronic equipment of starting shooting; Over-voltage protecting function:, can prevent of the damage of various high pressure to circuit for lightning voltage, the high pressure of electric spark generation, the high voltage pulse of unknown cause etc. provide the low resistance discharge channel.
The utility model may be used on multiple field, as power input, the signal input part of various LED light fixtures, communication product, automotive electronics, electric tool, electronic equipment, instrument, small household appliances etc.
The above only is embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure that utilizes the utility model specification and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.
Claims (4)
1. the synthetic three-terminal protection element of NTC thermistor and piezo-resistance, it is characterized in that: comprise piezo-resistance, NTC thermistor, first pin, second pin, the 3rd pin and epoxy resin layer, described first pin, second pin and the 3rd pin all have connecting portion and conductive part, and described connecting portion and conductive part conduct;
First end of described piezo-resistance is electrically connected with the connecting portion of first pin, second end of described piezo-resistance is electrically connected with the connecting portion of second pin, first end of described NTC thermistor is electrically connected with the connecting portion of second pin, and second end of described NTC thermistor is electrically connected with the connecting portion of the 3rd pin;
The linking part of the linking part of described piezo-resistance, NTC thermistor, first pin, the linking part of second pin, the 3rd pin all places in the epoxy resin layer of curing.
2. the three-terminal protection element that NTC thermistor according to claim 1 and piezo-resistance are synthetic, it is characterized in that: described piezo-resistance is Zinc-oxide piezoresistor or silicon-carbide varistor.
3. the three-terminal protection element that NTC thermistor according to claim 2 and piezo-resistance are synthetic, it is characterized in that: described NTC thermistor is NTC ceramic thermal resistance or NTC organic polymer thermistor.
4. the three-terminal protection element that NTC thermistor according to claim 3 and piezo-resistance are synthetic, it is characterized in that: described first pin, second pin and the 3rd pin are zinc-plated pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206384036U CN201886853U (en) | 2010-12-02 | 2010-12-02 | Three-terminal protecting element synthesized by negative temperature coefficient (NTC) thermistor and piezoresistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206384036U CN201886853U (en) | 2010-12-02 | 2010-12-02 | Three-terminal protecting element synthesized by negative temperature coefficient (NTC) thermistor and piezoresistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201886853U true CN201886853U (en) | 2011-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206384036U Expired - Fee Related CN201886853U (en) | 2010-12-02 | 2010-12-02 | Three-terminal protecting element synthesized by negative temperature coefficient (NTC) thermistor and piezoresistor |
Country Status (1)
| Country | Link |
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| CN (1) | CN201886853U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332944A (en) * | 2014-10-27 | 2015-02-04 | 华南理工大学 | Pressure-sensitive and thermosensitive combined type overvoltage and over-current protecting device |
| CN104735854A (en) * | 2013-12-24 | 2015-06-24 | 深圳市达特照明股份有限公司 | Anti-surge circuit and integrated circuit with same |
-
2010
- 2010-12-02 CN CN2010206384036U patent/CN201886853U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104735854A (en) * | 2013-12-24 | 2015-06-24 | 深圳市达特照明股份有限公司 | Anti-surge circuit and integrated circuit with same |
| CN104332944A (en) * | 2014-10-27 | 2015-02-04 | 华南理工大学 | Pressure-sensitive and thermosensitive combined type overvoltage and over-current protecting device |
| CN104332944B (en) * | 2014-10-27 | 2017-10-20 | 华南理工大学 | A kind of pressure-sensitive temperature-sensitive compound type overvoltage over-current protection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: JIANGXI WANRUIHE ELECTRONIC CO., LTD. Free format text: FORMER OWNER: SHENZHEN WANRUIHE ELECTRIC CO., LTD. Effective date: 20131023 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 518000 SHENZHEN, GUANGDONG PROVINCE TO: 332020 JIUJIANG, JIANGXI PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20131023 Address after: 332020 Jiangxi province Jiujiang Gongqing Gongqing City Avenue industrial area Patentee after: JIANGXI WONDHOPE ELECTRIC CO., LTD. Address before: 518000 Guangdong city of Shenzhen province Baoan District streets of Minkang Lu Min Xing Industrial Zone 3, floor 2, 1 Patentee before: Shenzhen Wanruihe Electric Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110629 Termination date: 20141202 |
|
| EXPY | Termination of patent right or utility model |