CN209250231U - Temperature protection circuit and temperature-detecting device for it - Google Patents
Temperature protection circuit and temperature-detecting device for it Download PDFInfo
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- CN209250231U CN209250231U CN201822224538.7U CN201822224538U CN209250231U CN 209250231 U CN209250231 U CN 209250231U CN 201822224538 U CN201822224538 U CN 201822224538U CN 209250231 U CN209250231 U CN 209250231U
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Abstract
The utility model proposes a kind of temperature protection circuit and for its temperature-detecting device, described device, it include: sampling module, sampling module includes the second temperature sensor that the first temperature sensor of the first detection warm area is arranged in and the second detection warm area is arranged in, sampling module is by the temperature of the first temperature sensor detection the first detection warm area to generate the first sampled signal, and by the temperature of second temperature sensor detection the second detection warm area to generate the second sampled signal, sampling module also passes through the first sampling end and exports the first sampled signal, and the second sampled signal is exported by the second sampling end；Detection module; detection module is respectively connected with the first sampling end and the second sampling end; detection module with the second sampled signal by being compared the first sampled signal to export temperature signal; so that temperature protection circuit carries out temperature protection according to temperature signal, so as to quickly and efficiently reduce the risk of temperature protection not in time caused by temperature system lags.
Description
Technical field
The utility model relates to temperature detection technical field more particularly to a kind of temperature detections for temperature protection circuit
Device and a kind of temperature protection circuit.
Background technique
In power electronics field more particularly to switching power component and its application circuit, temperature acquisition and guarantor
Protective function module is indispensable.In defencive function realization, it is divided into hardware and software two ways, wherein hardware mode can be adopted
Use chip interior temperature monitoring port or external reference voltage as temperature protection foundation；Software mode is mainly with electric current electricity
Foundation of the pressure acquisition as temperature protection.
Wherein, hardware mode is widely used compared with reference voltage with electric resistance partial pressure.The prior art is protected using wise temperature
Shield: divider resistance collection voltages follow, output signal simultaneously compared with the first reference voltage and the second reference voltage, reference voltage
It is that the bleeder circuit mode of fixed resistance value is realized, but the resistance value of divider resistance is affected by temperature larger, the transmitting of temperature is
Delayed time system is lagged, at this moment if it will cause the damages of the excess temperature of device for power switching not in time to temperature protection, and then is caused
It cannot achieve due function.
Utility model content
The utility model is intended to one of the technical issues of at least solving in the related technology to a certain extent.
For this purpose, first purpose of the utility model is to propose that a kind of temperature detection for temperature protection circuit fills
It sets, the risk of temperature protection not in time caused by temperature system lags can be reduced, quickly and efficiently to protect circuit elements device
Part is exempted from excess temperature and is damaged, and due function is achieved.
Second purpose of the utility model is to propose a kind of temperature protection circuit.
In order to achieve the above object, the utility model first aspect proposes a kind of temperature detection dress for temperature protection circuit
It sets, comprising: sampling module, the sampling module include the first temperature sensor that the first detection warm area is arranged in and setting the
The second temperature sensor of two detection warm areas, the sampling module detect first detection by first temperature sensor
The temperature of warm area detects the described second temperature for detecting warm area by the second temperature sensor to generate the first sampled signal
To generate the second sampled signal, the sampling module also passes through the first sampling end and exports first sampled signal degree, and passes through
Second sampling end exports second sampled signal；Detection module, the detection module and first sampling end and described the
Two sampling ends are respectively connected with, and the detection module is by the way that first sampled signal to be compared with second sampled signal
To export temperature signal, so that the temperature protection circuit carries out temperature protection according to the temperature signal, wherein the temperature difference
Signal is used to indicate the difference variation rate of the first detection warm area and the second detection warm area.
The temperature-detecting device for temperature protection circuit of the utility model, sampling module pass through the first temperature sensor
The temperature of detection the first detection warm area passes through second temperature sensor detection the second detection warm area to generate the first sampled signal
Temperature to generate the second sampled signal, sampling module also passes through the first sampling end and exports the first sampled signal, and passes through second
Sampling end exports the second sampled signal, and detection module with the second sampled signal by being compared the first sampled signal to export
Temperature signal, it is stagnant so as to which temperature system is effectively reduced so that temperature protection circuit carries out temperature protection according to temperature signal
The risk of caused temperature protection not in time afterwards is damaged with protecting circuit components to exempt from excess temperature, achieves due function.
In addition, according to the utility model proposes the temperature-detecting device for temperature protection circuit can also have it is as follows
Additional technical characteristic:
Specifically, the sampling module further includes first resistor, wherein the first resistor, first temperature sensing
Device and the second temperature sensor are connected in series.
Wherein, one end of the first resistor is connected with default power supply, one end of first temperature sensor with it is described
The other end of first resistor is also connected with first sampling end after being connected, one end of the second temperature sensor and described the
The other end of one temperature sensor is also connected with second sampling end after being connected, another termination of the second temperature sensor
Ground.
Specifically, the detection module includes: comparing unit, and the first input end of the comparing unit is adopted with described first
Sample end be connected, the second input terminal of the comparing unit is connected with second sampling end, the comparing unit to will described in
First sampled signal is compared with second sampled signal, and exports the temperature difference by the output end of the comparing unit
Signal.
Specifically, the comparing unit includes: second resistance, one end of the second resistance and the first sampling end phase
Even；3rd resistor, one end of the 3rd resistor are connected with the other end of the second resistance, the other end of the 3rd resistor
Ground connection；One end of 4th resistance, the 4th resistance is connected with second sampling end；5th resistance, the 5th resistance
One end is connected with the other end of the 4th resistance；First comparator, the first input end of the first comparator and described the
The other end of two resistance is connected with one end of the 3rd resistor, the second input terminal of the first comparator and the 4th electricity
The other end of resistance is connected with one end of the 5th resistance, and the output end of the first comparator is another with the 5th resistance
End is connected.
Wherein, the resistance value of the second resistance is equal with the resistance value of the 4th resistance.
Specifically, the detection module includes: the first follower, and first follower is connected to the comparing unit
Between first input end and first sampling end, first sampled signal is transferred to the comparison by first follower
The first input end of unit；Second follower, second follower are connected to the second input terminal and the institute of the comparing unit
It states between the second sampling end, second sampled signal is transferred to the second input of the comparing unit by second follower
End.
Wherein, first follower includes the second comparator, the first input end of second comparator and described the
One sampling end is connected, and the second input terminal of second comparator pair is connected with the output end of second comparator, and described the
The output end of two comparators is also connected with the first input end of the comparing unit；Second follower includes that third compares
Device, the first input end of the third comparator are connected with second sampling end, the second input of the third comparator pair
End is connected with the output end of the third comparator, and the output end of the third comparator is also defeated with the second of the comparing unit
Enter end to be connected.
Further, the above-mentioned temperature-detecting device for temperature protection circuit, further includes output unit, the output
Unit includes the 6th resistance and first capacitor, and one end of the 6th resistance is connected with the output end of the comparing unit, described
One end of first capacitor is connected with the other end of the 6th resistance, the other end ground connection of the first capacitor.
In order to achieve the above object, the utility model also proposed a kind of temperature protection circuit comprising above-mentioned is used for temperature
Protect the temperature-detecting device of circuit.
The temperature protection circuit of the utility model can quickly and efficiently reduce temperature by above-mentioned temperature-detecting device
The risk of temperature protection not in time caused by degree system lags, to protect circuit components to exempt from, excess temperature is impaired, and achieving should have
Function.
The additional aspect of the utility model and advantage will be set forth in part in the description, partially will be from following description
In become obvious, or recognized by the practice of the utility model.
Detailed description of the invention
The utility model is above-mentioned and/or additional aspect and advantage from the following description of the accompanying drawings of embodiments will
Become obvious and be readily appreciated that, in which:
Fig. 1 is the warm area protection philosophy block diagram of the utility model one embodiment；And
Fig. 2 is the circuit diagram of the temperature-detecting device for temperature protection circuit of the utility model one embodiment.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model
Limitation.
Below with reference to the accompanying drawings the temperature-detecting device and temperature for temperature protection circuit of the utility model embodiment is described
Degree protection circuit.
Fig. 1 is the warm area protection philosophy block diagram of the utility model one embodiment, and Fig. 2 is the utility model one embodiment
The temperature-detecting device for temperature protection circuit circuit diagram.Referring to Figures 1 and 2, the temperature that is used for of the utility model is protected
The temperature-detecting device of protection circuit, comprising: sampling module 10 and detection module 20.
Wherein, sampling module 10 includes that the first temperature sensor 11 of the first detection warm area T1 is arranged in and is arranged second
The second temperature sensor 12 of warm area T2 is detected, sampling module 10 passes through the first detection of the first temperature sensor 11 detection warm area T1
Temperature to generate the first sampled signal, and by the temperature of second detection of the detection of second temperature sensor 12 warm area T2 to generate
Second sampled signal, sampling module 10 also exports the first sampled signal by the first sampling end, and is exported by the second sampling end
Second sampled signal.Detection module 20 is respectively connected with the first sampling end and the second sampling end, and detection module 20 is by by first
Sampled signal is compared to export temperature signal with the second sampled signal, so that temperature protection circuit is carried out according to temperature signal
Temperature protection, wherein temperature signal is used to indicate the difference variation rate of the detection of the first detection warm area T1 and second warm area T2, temperature
Protection can be set protection limits value by temperature rate of change, effectively avoided temperature lag bring guard delay and damaged circuit elements
Device leads to disabler.
It should be noted that the first detection warm area T1 and the second detection warm area T2 are inclined with proximity test point temperature environs
Difference definition.The resistance value of first temperature sensor 11 changes, second temperature sensor 12 with the variation of the first detection warm area T1
Resistance value with second detection warm area T2 variation and change.First temperature sensor 11 and second temperature sensor 12 can be negative
Temperature Coefficient type, or be that positive temperature coefficient or Positive and Negative Coefficient Temperature use three kinds of modes with, specifically here with no restrictions.
In one embodiment of the utility model, as shown in Fig. 2, sampling module 10 further include: first resistor R1, first
Resistance R1 is in the warm area that environment temperature is T0.First resistor R1, the first temperature sensor 11 and second temperature sensor 12 are gone here and there
Connection connection, one end of first resistor R1 are connected with default power supply VCC, and one end of the first temperature sensor 11 is with first resistor R1's
The other end is also connected with the first sampling end after being connected, and one end of second temperature sensor 12 is another with the first temperature sensor 11
End is also connected with the second sampling end after being connected, and the other end of second temperature sensor 12 is grounded GND.
It is understood that the first sampled signal is that first resistor R1 and the first temperature sensor 11 and second temperature sense
Electric resistance partial pressure after the series connection of device 12.Second sampled signal is the resistance point of the first temperature sensor 11 with second temperature sensor 12
Pressure.It is assumed that the voltage at 11 both ends of the first temperature sensor is V11, the voltage at 12 both ends of second temperature sensor is V12, can be obtained
To the voltage V1=Vcc-V11-V12 at the both ends first resistor R1.
The temperature of first detection warm area T1 can be calculated by following formula (1):
Wherein, TCR1 is the temperature coefficient of the first temperature sensor, and R1 is the resistance value of first resistor, and V11 is the first temperature
The voltage at sensor both ends, R11 are the resistance value of the first temperature sensor, and T0 is environment temperature warm area.
Similarly, the temperature of the second detection warm area T2 can be calculated by following formula (2):
Wherein, TCR2 is the temperature coefficient of second temperature sensor, and V12 is the voltage at second temperature sensor both ends, R12
For the resistance value of second temperature sensor.
One embodiment according to the present utility model, as shown in Fig. 2, detection module 20 includes: comparing unit 21.Compare list
The first input end of member 21 is connected with the first sampling end, and the second input terminal of comparing unit 21 is connected with the second sampling end, compares
Unit 21 exports temperature the first sampled signal to be compared with the second sampled signal, and by comparing the output end of unit 21
Difference signal.
A specific embodiment according to the present utility model, as shown in Fig. 2, comparing unit 21 includes: second resistance R2,
Three resistance R3, the 4th resistance R4, the 5th resistance R5 and first comparator CMP1.Wherein, one end of second resistance R2 is adopted with first
Sample end is connected, and one end of 3rd resistor R3 is connected with the other end of second resistance R2, and the other end of 3rd resistor R3 is grounded GND,
One end of 4th resistance R4 is connected with the second sampling end, and one end of the 5th resistance R5 is connected with the other end of the 4th resistance R4, the
The first input end of one comparator CMP1 is connected with one end of the other end of second resistance R2 and 3rd resistor R3, first comparator
The second input terminal of CMP1 is connected with one end of the other end of the 4th resistance R4 and the 5th resistance R5, and first comparator CMP1's is defeated
Outlet is connected with the other end of the 5th resistance R5.Wherein, the resistance value of second resistance R2 is equal with the resistance value of the 4th resistance R4, third
Resistance R3 is used to balance the influence of input offset current.
One embodiment according to the present utility model, as shown in Fig. 2, detection module 20 further include: 22 He of the first follower
Second follower 23.Wherein, the first follower 22 is connected between the first input end of comparing unit 21 and the first sampling end, the
First sampled signal is transferred to the first input end of comparing unit 21 by one follower 22, and the second follower 23 is connected to comparison list
Between the second input terminal and the second sampling end of member 21, the second sampled signal is transferred to comparing unit 21 by the second follower 23
Second input terminal.
Wherein, the first follower 22 includes the second comparator CMP2, the first input end and first of the second comparator CMP2
Sampling end is connected, and the second input terminal of the second comparator CMP2 is connected with the output end of the second comparator CMP2, the second comparator
The output end of CMP2 is also connected with the first input end of comparing unit 21；Second follower 23 includes third comparator CMP3, the
The first input end of three comparator CMP3 is connected with the second sampling end, and the second input terminal of third comparator CMP3 is compared with third
The output end of device CMP3 is connected, and the output end of third comparator CMP3 is also connected with the second input terminal of comparing unit 21.
It is understood that the output voltage signal of the first follower 22 is first resistor R1 and the first temperature sensor 11
Electric resistance partial pressure after connecting with second temperature sensor 12, the output voltage signal of the second follower 23 are the first temperature sensor
11 with the electric resistance partial pressure of second temperature sensor 12.
One embodiment according to the present utility model, as shown in Fig. 2, the above-mentioned temperature detection for temperature protection circuit
Device, further includes output unit 30, and output unit 30 includes the 6th resistance R6 and first capacitor C1, one end of the 6th resistance R6 with
The output end of comparing unit 21 is connected, and one end of first capacitor C1 is connected with the other end of the 6th resistance R6, and as output end
The other end of mouth I01, first capacitor C1 are grounded GND.
Specifically, the first sampled signal is generated by the temperature of the first detection of the first temperature sensor 11 detection warm area T1,
The first sampled signal to the first follower 22 is exported by the first sampling end, and passes through second inspection of the detection of second temperature sensor 12
The temperature of temperature measuring area T2 is exported to second by the second sampled signal of the second sampling end output and is followed to generate the second sampled signal
Device 23.The output voltage signal of the output voltage signal of first follower 22 and the second follower 23 is exported respectively to comparing unit
21, first comparator CMP1 in comparing unit 21 are defeated to the output voltage signal of the first follower 22 and the second follower 23
Voltage signal carries out difference ratio enlargement out.Wherein, the differential amplification ratio of first comparator CMP1 is by the 4th resistance R4 and
The ratio of five resistance R5 determines.
For example, temperature signal △ T can be calculated by following formula (3) as difference magnification ratio R5/R4=1:
Difference variation rate θ can be calculated by following formula (4):
θ=△ T/t (4)
It should be noted that difference variation rate θ system open stage do not fix value limit.
For another example, as difference magnification ratio R5/R4 ≠ 1, output voltage VIO1It can be calculated by following formula (5):
VIO1=R5/R4* Δ T (5)
It should be noted that the voltage V obtained after differential amplification ratioIO1Meet rail-to-rail amplifier maximum output range.It is soft
Part mode handles temperature collection fluctuation voltage according to the accuracy selection Q format of single-chip microcontroller digit and needs.
The temperature-detecting device of the utility model assesses temperature risk in a dynamic fashion, and previous mode mainly uses quiet
The fixed form of state does temperature protection setting, and static mode can only detect and protect specific state, to abnormal nothing in the process
Method is effectively protected.Meanwhile to difference variation rate fast response time, temperature protection caused by temperature system lags is effectively reduced not
Timely risk.Also, it equally may be implemented to be effectively protected in the lower situation of temperature sensor precision.
The utility model using difference variation rate calculate, can be protected during temperaturing lifting abnormality, avoid operating condition,
The abnormal caused temperature such as system reaches temperature protection limits value, and the temperature-detecting device of the utility model is in the protection response time
It is upper shorter.The utility model can effectively record electric control temperature to system exception operating condition and become situation, corresponding voltage and electric current, so as to
Better orientation problem provides more information to analysis failure after sale, efficiently solves client and complain, reduces research and development rectification week
Phase.
In conclusion the temperature-detecting device for temperature protection circuit of the utility model, sampling module passes through first
The temperature of temperature sensor detection the first detection warm area detects the by second temperature sensor to generate the first sampled signal
To generate the second sampled signal, sampling module also passes through the first sampling end and exports the first sampled signal the temperature of two detection warm areas,
And the second sampled signal is exported by the second sampling end, detection module is by carrying out the first sampled signal and the second sampled signal
Compare to export temperature signal, so that temperature protection circuit carries out temperature protection according to temperature signal, so as to quickly and have
Effect reduces the risk of temperature protection not in time caused by temperature system lags, and is damaged with protecting circuit components to exempt from excess temperature, makes it
Realize due function.
Based on the above embodiment, the utility model also proposed a kind of temperature protection circuit comprising above-mentioned is used for temperature
The temperature-detecting device of degree protection circuit.
The temperature protection circuit of the utility model can quickly and efficiently reduce temperature by above-mentioned temperature-detecting device
The risk of temperature protection not in time caused by degree system lags, to protect circuit components to exempt from, excess temperature is impaired, and achieving should have
Function.
In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside",
The orientation or positional relationship of the instructions such as " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " is based on the figure
Orientation or positional relationship is merely for convenience of describing the present invention and simplifying the description, rather than the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the utility model
Limitation.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.The meaning of " plurality " is two or two in the description of the present invention,
More than, unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be
Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
The interaction relationship of connection or two elements inside element.It for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature is in the second feature " on " or " down "
It can be that the first and second features directly contact or the first and second features are by intermediary mediate contact.Moreover, first is special
Sign can be fisrt feature above the second feature " above ", " above " and " above " and be directly above or diagonally above the second feature, or only
Indicate that first feature horizontal height is higher than second feature.Fisrt feature under the second feature " below ", " below " and " below " can be with
It is that fisrt feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
It states and is necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with
It can be combined in any suitable manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this field
Technical staff can by the feature of different embodiments or examples described in this specification and different embodiments or examples into
Row combination and combination.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model
Inside it can make changes, modifications, alterations, and variations to the above described embodiments.
Claims (10)
1. a kind of temperature-detecting device for temperature protection circuit characterized by comprising
Sampling module, the sampling module include the first temperature sensor that the first detection warm area is arranged in and setting in the second inspection
The second temperature sensor of temperature measuring area, the sampling module detect the first detection warm area by first temperature sensor
Temperature to generate the first sampled signal, and by the second temperature sensor detect the temperature of the second detection warm area with
The second sampled signal is generated, the sampling module also passes through the first sampling end and exports first sampled signal, and passes through second
Sampling end exports second sampled signal；
Detection module, the detection module are respectively connected with first sampling end and second sampling end, the detection mould
Block with second sampled signal by being compared first sampled signal to export temperature signal, so as to the temperature
Circuit is protected to carry out temperature protection according to the temperature signal, wherein the temperature signal is used to indicate the first detection temperature
The difference variation rate in area and the second detection warm area.
2. the temperature-detecting device according to claim 1 for temperature protection circuit, which is characterized in that the sampling mould
Block further includes first resistor, wherein the first resistor, first temperature sensor and second temperature sensor series connection
Connection.
3. the temperature-detecting device according to claim 2 for temperature protection circuit, which is characterized in that wherein, described
One end of first resistor is connected with default power supply, one end of first temperature sensor and the other end phase of the first resistor
Also it is connected with first sampling end after even, one end of the second temperature sensor is another with first temperature sensor
End is also connected with second sampling end after being connected, the other end ground connection of the second temperature sensor.
4. the temperature-detecting device according to any one of claim 1-3 for temperature protection circuit, which is characterized in that
The detection module includes:
Comparing unit, the first input end of the comparing unit are connected with first sampling end, and the second of the comparing unit
Input terminal is connected with second sampling end, and the comparing unit is to believe first sampled signal and second sampling
It number is compared, and the temperature signal is exported by the output end of the comparing unit.
5. the temperature-detecting device according to claim 4 for temperature protection circuit, which is characterized in that described relatively more single
Member includes:
Second resistance, one end of the second resistance are connected with first sampling end；
3rd resistor, one end of the 3rd resistor are connected with the other end of the second resistance, the 3rd resistor it is another
End ground connection；
One end of 4th resistance, the 4th resistance is connected with second sampling end；
One end of 5th resistance, the 5th resistance is connected with the other end of the 4th resistance；
The other end of first comparator, the first input end of the first comparator and the second resistance and the 3rd resistor
One end be connected, the one of the other end of the second input terminal of the first comparator and the 4th resistance and the 5th resistance
End is connected, and the output end of the first comparator is connected with the other end of the 5th resistance.
6. the temperature-detecting device according to claim 5 for temperature protection circuit, which is characterized in that second electricity
The resistance value of resistance is equal with the resistance value of the 4th resistance.
7. the temperature-detecting device according to claim 4 for temperature protection circuit, which is characterized in that the detection mould
Block includes:
First follower, first follower be connected to the comparing unit first input end and first sampling end it
Between, first sampled signal is transferred to the first input end of the comparing unit by first follower；
Second follower, second follower be connected to the comparing unit the second input terminal and second sampling end it
Between, second sampled signal is transferred to the second input terminal of the comparing unit by second follower.
8. the temperature-detecting device according to claim 7 for temperature protection circuit, which is characterized in that wherein,
First follower includes the second comparator, the first input end of second comparator and the first sampling end phase
Even, the second input terminal of second comparator pair is connected with the output end of second comparator, second comparator
Output end is also connected with the first input end of the comparing unit；
Second follower includes third comparator, the first input end of the third comparator and the second sampling end phase
Even, the second input terminal of the third comparator pair is connected with the output end of the third comparator, the third comparator
Output end is also connected with the second input terminal of the comparing unit.
9. the temperature-detecting device according to claim 4 for temperature protection circuit, which is characterized in that further include output
Unit, the output unit include the 6th resistance and first capacitor, and one end of the 6th resistance is defeated with the comparing unit
Outlet is connected, and one end of the first capacitor is connected with the other end of the 6th resistance, another termination of the first capacitor
Ground.
10. a kind of temperature protection circuit, which is characterized in that be used for temperature including according to claim 1 to 9
Protect the temperature-detecting device of circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822224538.7U CN209250231U (en) | 2018-12-27 | 2018-12-27 | Temperature protection circuit and temperature-detecting device for it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822224538.7U CN209250231U (en) | 2018-12-27 | 2018-12-27 | Temperature protection circuit and temperature-detecting device for it |
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| Publication Number | Publication Date |
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| CN209250231U true CN209250231U (en) | 2019-08-13 |
Family
ID=67535145
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| CN201822224538.7U Active CN209250231U (en) | 2018-12-27 | 2018-12-27 | Temperature protection circuit and temperature-detecting device for it |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114336565A (en) * | 2022-03-10 | 2022-04-12 | 成都凯天电子股份有限公司 | Lightning protection device based on high-temperature silicon piezoresistive sensor and lightning protection method thereof |
-
2018
- 2018-12-27 CN CN201822224538.7U patent/CN209250231U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114336565A (en) * | 2022-03-10 | 2022-04-12 | 成都凯天电子股份有限公司 | Lightning protection device based on high-temperature silicon piezoresistive sensor and lightning protection method thereof |
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