CN106249800B - Overheating protection circuit and the electronic installation with overheat protective function - Google Patents
Overheating protection circuit and the electronic installation with overheat protective function Download PDFInfo
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- CN106249800B CN106249800B CN201610842215.7A CN201610842215A CN106249800B CN 106249800 B CN106249800 B CN 106249800B CN 201610842215 A CN201610842215 A CN 201610842215A CN 106249800 B CN106249800 B CN 106249800B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/565—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
- G05F1/567—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for temperature compensation
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- Automation & Control Theory (AREA)
- Protection Of Static Devices (AREA)
Abstract
The present invention provides a kind of overheating protection circuit and the electronic installation with overheat protective function, and overheating protection circuit includes：First thermistor, FET and the second thermistor, first thermistor have negative temperature coefficient, one end connection power end of first thermistor；The FET includes source electrode, drain electrode and grid, and the source electrode connects the one end of first thermistor, and the drain electrode linking objective end, the grid connects the other end of first thermistor；Second thermistor has positive temperature coefficient, one end of second thermistor connects the grid, the other end of second thermistor is set, during so that proper first thermistor being heated with second thermistor and causes the first resistance of first thermistor to reduce, the second resistance of second thermistor is raised, voltage between the grid and the source electrode reduces, and then the electric current for inputting the destination end by the drain electrode reduces to slow down temperature-rise period.
Description
Technical field
The present invention relates to overtemperature protection field, more particularly to a kind of overheating protection circuit and the electricity with overheat protective function
Sub-device.
Background technology
At present, the function on circuit for temperature-compensating is usually to need the integrated electricity using thermistor and amplifier
Road, or the directly integrated circuit control voltage of otherwise designed one or electric current carry out temperature-compensating, and are being entered using both modes
During trip temperature is compensated, the circuit pressure drop on circuit can be all influenceed, so, circuit element on circuit can be changed
Voltage and the characteristic for changing circuit element, and then the reliability and tolerance of circuit element are impacted.
The content of the invention
It is an object of the invention to provide a kind of overheating protection circuit and the electronic installation with overheat protective function, to solve
Certainly above mentioned problem.
In order to achieve the above object, in a first aspect, the present invention provides a kind of overheating protection circuit, including：First temperature-sensitive electricity
Resistance, FET and the second thermistor, first thermistor have negative temperature coefficient, one end of first thermistor
Connect power end；The FET includes source electrode, drain electrode and grid, and the source electrode connects the one end of first thermistor,
The drain electrode linking objective end, the grid connects the other end of first thermistor；Second thermistor has positive temperature system
Number, one end of second thermistor connects the grid, sets the other end of second thermistor, so that proper first heat
Quick resistance and second thermistor be heated and cause the first resistance of first thermistor to reduce, second thermistor
When second resistance is raised, the voltage between the grid and the source electrode reduces, and then the electric current for inputting the destination end by the drain electrode subtracts
It is small so as to slowing down temperature-rise period.
Preferably, the other end ground connection of second thermistor.
Preferably, also including：Voltage input end and transistor, the transistor have input, output end and ground connection
End, the input connects the voltage input end, and earth terminal ground connection, other end of second thermistor connects the output
End；When controlling the voltage input end to cause the transistor turns, the output end is equal with the ground connection terminal potential；When the output end
Equal with the ground connection terminal potential, first thermistor and second thermistor are heated and cause the of first thermistor
When the reduction of one resistance, the second resistance rise of second thermistor, the voltage between the grid and the source electrode reduces, Jin Eryou
The electric current that the drain electrode inputs the destination end reduces to slow down temperature-rise period.
Preferably, also including：3rd thermistor, the 3rd thermistor has positive temperature coefficient, the 3rd temperature-sensitive electricity
Hinder with the second thermistor serial or parallel connection to be in multiple temperature in the 3rd thermistor and second thermistor
The 3rd thermistor forms multiple resistances with second thermistor during degree environment, and then causes the overheating protection circuit foundation
The difference of ambient temperature automatically adjusts the current switching to one of in multiple electric currents corresponding with the plurality of resistance.
Preferably, also including：At least one the 4th thermistor, each 4th thermistor has positive temperature coefficient, should
Each 4th thermistor be used for the 3rd thermistor and/or the second thermistor serial or parallel connection with cause this
Second heat when two thermistors, the 3rd thermistor and at least one the 4th thermistor are in multiple temperature environments
Quick resistance, the 3rd thermistor and at least one the 4th thermistor form multiple resistances, and then cause the overtemperature protection
Circuit is automatically adjusted in the current switching to multiple electric currents corresponding with the plurality of resistance wherein according to the difference of ambient temperature
One of.
Preferably, first thermistor, second thermistor are set adjacent to the power end, when the power end is because of work
During overheat, first thermistor and second thermistor are heated, first resistance reduction of first thermistor, this
Second resistance rise of two thermistors, the voltage between the grid and the source electrode reduces, and the destination end is inputted by the drain electrode
Electric current reduce and then slow down the temperature-rise period of the power end.
Preferably, first thermistor, second thermistor adjacent to the FET set, when the FET because
When short-circuit conditions occur in work overheat or the destination end, first thermistor is heated with second thermistor, first heat
First resistance reduction of quick resistance, second resistance rise of second thermistor, the electricity between the grid and the source electrode
Pressure reduces, and the electric current for inputting the destination end by the drain electrode reduces and then slows down the temperature-rise period of the FET.
Second aspect, the present invention provides a kind of electronic installation with overheat protective function, including above-mentioned first aspect institute
Overheating protection circuit, the power end and the destination end stated.
Preferably, the power end is the charging inlet of the electronic installation, the destination end is battery；Or, the power end is
Battery or the interface for providing electric energy, the destination end is the interface for connecting other electronic equipments, thinks other electronic equipments
Charging.
Preferably, the destination end is used for the charging inlet for connecting external electronic device.
Compared with prior art, the overheating protection circuit that the present invention is provided and the electronic installation with overheat protective function,
When temperature is raised, pass through the first thermistor with negative temperature coefficient and the second thermistor control with positive temperature coefficient
System flows through the current reduction of FET, and then controls to flow into the current reduction of destination end, the first thermistor, the second temperature-sensitive electricity
Resistance is collectively forming with temperature controlled switch with FET, and then reaches the function of overtemperature protection, will not change charging dress
Put, the pressure drop of electric discharge device or power source supply end (power end i.e. for providing electric energy), arranged in pairs or groups heat with FET merely
The simple designs of quick resistance reach monitoring power end temperature and control electric current and then realize overheat protective function, it is to avoid to circuit
The reliability of element is impacted with tolerance.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of overheating protection circuit provided in an embodiment of the present invention；
Fig. 2 is the schematic diagram of another overheating protection circuit provided in an embodiment of the present invention；
Fig. 3 is the schematic diagram of another overheating protection circuit provided in an embodiment of the present invention.
Embodiment
To make to have further understanding to the purpose of the present invention, construction, feature and its function, hereby coordinate embodiment detailed
It is described as follows.
Fig. 1 is a kind of schematic diagram of overheating protection circuit provided in an embodiment of the present invention.As shown in figure 1, overtemperature protection is electric
Road includes：First thermistor R29, FET Q5 and the second thermistor R30.First thermistor R29 has subzero temperature
Coefficient is spent, FET Q5 includes source S, drain D and grid G, and the second thermistor R30 has positive temperature coefficient.First
The thermistor R29 connection of one end 11 power end 100, the first thermistor R29 connection FET of the other end 12 Q5 grid
Pole G, FET Q5 source S connect the first thermistor R29 one end 11, FET Q5 drain D linking objective end
200, FET Q5 grid G are directly connected to the second thermistor R30 one end 13, set the second thermistor R30's another
One end 14, so that proper first thermistor R29 and the second thermistor R30 is heated and causes the of the first thermistor R29
When the reduction of one resistance, the second thermistor R30 the second resistance rise, the voltage Vgs between grid G and source S reduces, and then
The electric current Id for inputting destination end 200 by drain D reduces to slow down temperature-rise period.When it is implemented, the first thermistor R29
Specification can be selected when temperature is 25 degrees Celsius (DEG C), and resistance value is the temperature-sensitive with negative temperature coefficient of 10 kilo-ohms (k Ω)
Resistance, the second thermistor R30 specification can be selected when temperature is 25 DEG C, and resistance value has positive temperature coefficient for 1k Ω's
Thermistor.
Fig. 2 is the schematic diagram of another overheating protection circuit provided in an embodiment of the present invention.As shown in Fig. 2 the second temperature-sensitive
The resistance R30 ground connection GND of the other end 14, is heated with the second thermistor R30 and causes the first thermistor R29 the first resistance
When reduction, the second thermistor R30 the second resistance rise, the voltage Vgs between grid G and source S reduces, and then by draining
The electric current Id of D input destination ends 200 reduces to slow down temperature-rise period.
Fig. 3 is the schematic diagram of another overheating protection circuit provided in an embodiment of the present invention.As shown in figure 3, overtemperature protection
Circuit is also included：Voltage input end EN2 and transistor Q6, transistor Q6 have input I, output end O and earth terminal G,
Input I connections voltage input end EN2, earth terminal G ground connection GND, transistor Q6 are specifically as follows transistor, wherein,
Input I is base stage, and output end O is colelctor electrode, and earth terminal G is emitter stage；The second thermistor R30 other end 14 connects defeated
Go out to hold O.When control voltage input EN2 make it that transistor Q6 is turned on for high potential, output end O and earth terminal G current potential phases
Deng；When output end O is equal with earth terminal G current potentials, the first thermistor R29 and the second thermistor R30 are heated and cause first
When thermistor R29 the first resistance reduction, the second thermistor R30 the second resistance are raised, between grid G and source S
Voltage Vgs reduces, and then the electric current Id for inputting destination end 200 by drain D reduces to slow down temperature-rise period.
Exemplary for the overheating protection circuit described in above-described embodiment, the second thermistor R30 is when more than 80 DEG C
Impedance value can increase by 500 (i.e. the second thermistor R30 former resistance be 1k Ω, then at 80 DEG C the second thermistor R30 resistance
Value can become 5k Ω), in this way, FET Q5 grid G voltage can rise and reach limitation electric current Id effect, when temperature is held
Continuous when rising to 120 DEG C, the first thermistor R29 resistance can be reduced to 1/10, and (i.e. the former resistance of the first thermistor R29 is
10k Ω, at 120 DEG C, the first thermistor R29 resistance becomes 1k Ω), in this way, the electricity for flowing through FET Q5 can be limited
Id is flowed, the function of overtemperature protection is reached.
For the overheating protection circuit described in above-described embodiment, due to the first thermistor R29 and the second thermistor R30
Different temperature characterisitics, with the lasting change of temperature, the first thermistor R29 is different from the second thermistor R30 presentations
Resistance value so that electric current Id can be switched according to the first thermistor R29 and the difference of the second thermistor R30 resistance value
To different gears.
Preferably, for the overheating protection circuit shown in above-mentioned Fig. 1 to Fig. 3, can also include：3rd thermistor, the
Three thermistors have a positive temperature coefficient, and the 3rd thermistor and the second thermistor R30 serial or parallel connections are to cause the 3rd
The 3rd thermistor is formed with the second thermistor R30 when thermistor is in multiple temperature environments with the second thermistor R30
Multiple resistances, and then overheating protection circuit is automatically adjusted electric current Id according to the difference of ambient temperature and is switched to and multiple resistances
One of in corresponding multiple electric currents.Further, overheating protection circuit can also include：At least one the 4th temperature-sensitive electricity
Resistance, each 4th thermistor has positive temperature coefficient, and each 4th thermistor is used for and the 3rd thermistor and/or second
Thermistor R30 serial or parallel connections are to cause in the second thermistor R30, the 3rd thermistor and at least one the 4th temperature-sensitive
The second thermistor R30, the 3rd thermistor and at least one the 4th thermistor are formed when resistance is in multiple temperature environments
Multiple resistances, and then overheating protection circuit is automatically adjusted electric current Id according to the difference of ambient temperature and is switched to and multiple resistances
One of in corresponding multiple electric currents.
Preferably, the first thermistor R29, the second thermistor R30 are set adjacent to power end 100, when power end 100 because
During work overheat, because the first thermistor R29, the second thermistor R30 are set adjacent to power end 100, the first thermistor
R29 and the second thermistor R30 is heated can cause the first thermistor R29 the first resistance to reduce, the second thermistor R30
Second resistance is raised, and then the voltage Vgs between grid G and source S is reduced, and the electric current of destination end 200 is inputted by drain D
Reduce Id and then slow down the temperature-rise period of power end 100, and then protect power end 100.Further, if in overheating protection circuit also
Including other thermistors (for example, the 3rd thermistor, the 4th thermistor), other thermistors also are adjacent to power end 100
Set.Because different thermistors has different temperature characterisitics, using the difference between different thermistors, then with connect or
Mode in parallel is connected, and can be set and be allowed overheating protection circuit to reach the resistance to be adjusted；Exemplary, the 3rd thermistor
The second thermistor R30 is parallel to, when temperature is 100 DEG C (first grade), the second thermistor R30, the 3rd thermistor are all
For A Ω, when temperature is 200 DEG C (second gear), the second thermistor R30 be that B Ω (B is more than A), the 3rd thermistor are A Ω,
When temperature is 300 DEG C (third gear), the second thermistor R30, the 3rd thermistor are all B Ω (B is more than A), in this way, can temperature
The difference of resistance value caused by the difference of degree and switching electric current Id are to different gears, therefore, in practical application, Ke Yigen
At least one electric current extremely needed in second thermistor, the 3rd thermistor, the 4th thermistor is set according to actual demand
Gear.
Preferably, the first thermistor R29, the second thermistor R30 are set adjacent to FET Q5, as FET Q5
Because work overheat or destination end 200 there are short-circuit conditions cause FET Q5 overheat when, due to the first thermistor R29,
Second thermistor R30 is set adjacent to FET Q5, and the first thermistor R29 and the second thermistor R30 is heated to be caused
First thermistor R29 the first resistance reduction, the second thermistor R30 the second resistance rise, and then cause grid G and source
Voltage Vgs between the S of pole reduces, and the electric current Id for inputting destination end 200 by drain D reduces and then slows down FET Q5 heating
Process, and then protect power end and destination end.Further, if also including other thermistors in overheating protection circuit (for example, the
Three thermistors, the 4th thermistor), other thermistors also are adjacent to FET Q5 settings.
Electronic installation with overheat protective function can include any of the above-described embodiment described in overheating protection circuit, on
State power end 100 and above-mentioned destination end 200.In practical application, for receiving electric energy, (i.e. electronic installation is to fill to electronic installation
Electric installation), exemplary, electronic installation is the mobile terminals such as mobile phone, tablet personal computer, and power end 100 can be electronic installation
Charging inlet, destination end 200 can be battery, and overheating protection circuit can be played in charge electronic devices to electronic installation
Heat protective effect；Another situation, electronic installation is used for for other electronic equipments charging (i.e. electronic installation is electric discharge device), electricity
Source 100 is battery or the interface for providing electric energy, and destination end 200 is the interface for connecting other electronic equipments, exemplary,
Electronic installation is charger baby.In practical application, power end 100 can be plug, the interface for connecting power supply, destination end
200 can be that the charging inlet for connecting external electronic device, i.e. electronic installation charge for external electronic equipments, overheat
Protection circuit external electronic equipments and the electronics comprising overheating protection circuit can be filled when external electronic equipments charge
Put and play superheat protecting function.
Overheating protection circuit provided in an embodiment of the present invention and the electronic installation with overheat protective function, in temperature rise
When, gone through the motions by the first thermistor with negative temperature coefficient with the second thermistor controlling stream with positive temperature coefficient and imitated
Should pipe current reduction, and then control flow into destination end current reduction, the first thermistor, the second thermistor and field-effect
Pipe is collectively forming with temperature controlled switch, and then reaches the function of overtemperature protection, will not change charging device, electric discharge device
Or the pressure drop of power source supply end (power end i.e. for providing electric energy), merely with the simple of FET collocation thermistor
Design reaches monitoring power end temperature and control electric current and then realizes overheat protective function, it is to avoid to the reliability of circuit element
Impacted with tolerance.
The present invention is been described by by above-mentioned related embodiment, but above-described embodiment is only the example for implementing the present invention.
It must be noted that, the embodiment disclosed is not limiting as the scope of the present invention.On the contrary, do not depart from the present invention spirit and
In the range of the change and retouching made, belong to the scope of patent protection of the present invention.
Claims (9)
1. a kind of overheating protection circuit, it is characterised in that including：
First thermistor, with negative temperature coefficient, one end connection power end of first thermistor；
FET, including source electrode, drain electrode and grid, the source electrode connect the one end of first thermistor, and the drain electrode connects
Destination end is connect, the grid connects the other end of first thermistor；
Second thermistor, with positive temperature coefficient, one end of second thermistor connects the grid, sets second temperature-sensitive
The other end of resistance, so that proper first thermistor is heated with second thermistor and causes first thermistor
When the reduction of the first resistance, the second resistance rise of second thermistor, the voltage between the grid and the source electrode reduces, and then
The electric current for inputting the destination end by the drain electrode reduces to slow down temperature-rise period；
The overheating protection circuit is also included
Voltage input end and transistor, the transistor have input, output end and earth terminal, and the input connects the voltage
Input, earth terminal ground connection, other end of second thermistor connects the output end；
When controlling the voltage input end to cause the transistor turns, the output end is equal with the ground connection terminal potential；When the output
End is equal with the ground connection terminal potential, and first thermistor is heated with second thermistor and causes first thermistor
When the reduction of the first resistance, the second resistance rise of second thermistor, the voltage between the grid and the source electrode reduces, and then
The electric current for inputting the destination end by the drain electrode reduces to slow down temperature-rise period.
2. a kind of overheating protection circuit, it is characterised in that including：
First thermistor, with negative temperature coefficient, one end connection power end of first thermistor；
FET, including source electrode, drain electrode and grid, the source electrode connect the one end of first thermistor, and the drain electrode connects
Destination end is connect, the grid connects the other end of first thermistor；
Second thermistor, with positive temperature coefficient, one end of second thermistor connects the grid, sets second temperature-sensitive
The other end of resistance, so that proper first thermistor is heated with second thermistor and causes first thermistor
When the reduction of the first resistance, the second resistance rise of second thermistor, the voltage between the grid and the source electrode reduces, and then
The electric current for inputting the destination end by the drain electrode reduces to slow down temperature-rise period；
The overheating protection circuit is also included
3rd thermistor, the 3rd thermistor has positive temperature coefficient, the 3rd thermistor and second thermistor
3rd temperature-sensitive when serial or parallel connection is to cause in the 3rd thermistor with second thermistor in multiple temperature environments
Resistance forms multiple resistances with second thermistor, and then causes the overheating protection circuit automatic according to the difference of ambient temperature
The current switching is adjusted one of into multiple electric currents corresponding with the plurality of resistance.
3. a kind of overheating protection circuit, it is characterised in that including：
First thermistor, with negative temperature coefficient, one end connection power end of first thermistor；
FET, including source electrode, drain electrode and grid, the source electrode connect the one end of first thermistor, and the drain electrode connects
Destination end is connect, the grid connects the other end of first thermistor；
Second thermistor, with positive temperature coefficient, one end of second thermistor connects the grid, sets second temperature-sensitive
The other end of resistance, so that proper first thermistor is heated with second thermistor and causes first thermistor
When the reduction of the first resistance, the second resistance rise of second thermistor, the voltage between the grid and the source electrode reduces, and then
The electric current for inputting the destination end by the drain electrode reduces to slow down temperature-rise period；
First thermistor, second thermistor are set adjacent to the power end, and when the power end is because of work overheat, this
One thermistor is heated with second thermistor, first resistance reduction of first thermistor, second thermistor
Second resistance rise, voltage between the grid and the source electrode reduces, and the electric current for inputting the destination end by the drain electrode reduces
And then slow down the temperature-rise period of the power end.
4. a kind of overheating protection circuit, it is characterised in that including：
First thermistor, with negative temperature coefficient, one end connection power end of first thermistor；
FET, including source electrode, drain electrode and grid, the source electrode connect the one end of first thermistor, and the drain electrode connects
Destination end is connect, the grid connects the other end of first thermistor；
Second thermistor, with positive temperature coefficient, one end of second thermistor connects the grid, sets second temperature-sensitive
The other end of resistance, so that proper first thermistor is heated with second thermistor and causes first thermistor
When the reduction of the first resistance, the second resistance rise of second thermistor, the voltage between the grid and the source electrode reduces, and then
The electric current for inputting the destination end by the drain electrode reduces to slow down temperature-rise period；
First thermistor, second thermistor adjacent to the FET set, when the FET because work overheat or
When short-circuit conditions occurs in the destination end, first thermistor and second thermistor are heated, first thermistor should
The reduction of first resistance, second resistance rise of second thermistor, the voltage between the grid and the source electrode reduces, by this
The electric current that drain electrode inputs the destination end reduces and then slows down the temperature-rise period of the FET.
5. overheating protection circuit as claimed in claim 1 or 2 or 3 or 4, it is characterised in that this of second thermistor is another
One end is grounded.
6. overheating protection circuit as claimed in claim 2, it is characterised in that also include：At least one the 4th thermistor, often
Individual 4th thermistor has positive temperature coefficient, each 4th thermistor be used for the 3rd thermistor and/or this
Two thermistor serial or parallel connections are to cause in second thermistor, the 3rd thermistor and this at least one the 4th heat
Second thermistor, the 3rd thermistor and at least one the 4th thermistor when quick resistance is in multiple temperature environments
Form multiple resistances, so cause the overheating protection circuit according to the difference of ambient temperature automatically adjust the current switching to this
One of in the corresponding multiple electric currents of multiple resistances.
7. a kind of electronic installation with overheat protective function, it is characterised in that including as described in claim any one of 1-6
Overheating protection circuit, the power end and the destination end.
8. electronic installation as claimed in claim 7, it is characterised in that the power end is the charging inlet of the electronic installation, should
Destination end is battery；Or, the power end is battery or the interface for providing electric energy, and the destination end is to be set for connecting other electronics
Standby interface, thinks other electronic equipment chargings.
9. electronic installation as claimed in claim 7, it is characterised in that the destination end is used for the charging for connecting external electronic device
Interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610842215.7A CN106249800B (en) | 2016-09-22 | 2016-09-22 | Overheating protection circuit and the electronic installation with overheat protective function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610842215.7A CN106249800B (en) | 2016-09-22 | 2016-09-22 | Overheating protection circuit and the electronic installation with overheat protective function |
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| CN106249800A CN106249800A (en) | 2016-12-21 |
| CN106249800B true CN106249800B (en) | 2017-11-07 |
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| CN106598105B (en) * | 2016-12-22 | 2019-09-24 | 上海与德信息技术有限公司 | A kind of temperature-control circuit and temprature control method based on mobile terminal |
| CN108733102B (en) * | 2017-04-25 | 2021-03-02 | 佛山市顺德区美的电热电器制造有限公司 | Temperature detection circuit and protection system for heating household appliance and household appliance |
| US11374393B2 (en) | 2020-06-30 | 2022-06-28 | Littelfuse, Inc. | Depletion mode MOSFET for overcurrent protection |
| CN114879802A (en) * | 2022-06-23 | 2022-08-09 | 广东美的白色家电技术创新中心有限公司 | Current regulating device, method, device, equipment and medium |
| CN114967815A (en) * | 2022-06-23 | 2022-08-30 | 广东美的白色家电技术创新中心有限公司 | Voltage regulation device, method, device, equipment and medium |
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| CN103036203A (en) * | 2011-10-10 | 2013-04-10 | 鸿富锦精密工业（深圳）有限公司 | Protection circuit |
| CN104655310A (en) * | 2013-11-25 | 2015-05-27 | 联合汽车电子有限公司 | Temperature detection circuit and implementation method thereof |
| CN204720962U (en) * | 2015-07-08 | 2015-10-21 | 英飞特电子（杭州）股份有限公司 | A kind of thermal-shutdown circuit |
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| CN106249800A (en) | 2016-12-21 |
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