CN201171156Y - Control integrated circuit for over temperature protection - Google Patents
Control integrated circuit for over temperature protection Download PDFInfo
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- CN201171156Y CN201171156Y CNU2008200446031U CN200820044603U CN201171156Y CN 201171156 Y CN201171156 Y CN 201171156Y CN U2008200446031 U CNU2008200446031 U CN U2008200446031U CN 200820044603 U CN200820044603 U CN 200820044603U CN 201171156 Y CN201171156 Y CN 201171156Y
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Abstract
The utility model discloses an over-temperature protection control integrated circuit which comprises a power voltage supply, a thermosensitive resistor, a first resistor, a second resistor, a third resistor, an amplifier and an external device; the input end of the thermosensitive resistor is electrically connected with the output end of the power voltage supply; the input end of the first resistor is electrically connected with the output end of the thermosensitive resistor, and the output end of the first resistor is grounded; the input end of the second resistor and the input end of the thermosensitive resistor are connected with the output end of the power voltage supply; the input end of the third resistor is electrically connected with the output end of the second resistor, and the output end of the third resistor is grounded; the normal phase input end of the amplifier is electrically connected with the output end of the second resistor, and the reversed phase input end is electrically connected with the output end of the thermosensitive resistor; the output end of the amplifier outputs control signal; the external device is connected with the output end of the amplifier.
Description
[technical field]
The utility model relates to a kind of integrated circuit, particularly a kind of overheat protector control integrated circuit.
[background technology]
Progress along with science and technology, the method that stores data is by the earliest vacuum tube, transistor, proceed to integrated circuit (IC) chip, the volume low capacity is big, purposes very extensively, every electric equipment products in the life have a control switch mostly, the microcomputer control system from the simplest current blocking device to complexity, and each all needs the control of chip.
The overheated circuit that for good and all damages electric equipment products sometimes.And control the temperature that is difficult to measure device, chip in the electric equipment products sometimes with a control switch, the device in the product, chip for good and all will not damaged when when internal temperature is too high, cutting off circuit.So, often change device, chip can have been wasted a large amount of costs.
In view of this, in fact be necessary to propose a kind of overheat protector control integrated circuit, utilize this overheat protector control integrated circuit can prevent damage under the above-mentioned situation, the interior circuit that cuts off integrated circuit when being arranged in maximum temperature comes protective circuit.
[summary of the invention]
Therefore; the utility model provides a kind of overheat protector control integrated circuit, to realize preventing that integrated circuit is in short circuit, low ohmic load, when lacking radiator and the enough self-heatings of the generation that takes place reach the purpose that these critical temperatures for good and all damage integrated circuit (IC) apparatus.
For achieving the above object, the utility model provides a kind of overheat protector control integrated circuit, and this overheat protector control integrated circuit comprises: a supply power voltage; One thermistor, its input electrically connects the output of above-mentioned supply power voltage; One first resistance, its input electrically connects the output of above-mentioned thermistor, the output head grounding of this first resistance; One second resistance, the input of its input and thermistor is connected the output of above-mentioned supply power voltage together; One the 3rd resistance, its input electrically connects the output of above-mentioned second resistance, the output head grounding of the 3rd resistance; One amplifier, its normal phase input end electrically connects the output of above-mentioned second resistance, and inverting input electrically connects the output of above-mentioned thermistor, and what the output of this amplifier was exported is control signal; One external device, it is connected with the output of amplifier.
In present embodiment, first resistance, second resistance, the 3rd resistance are used to draw the reference voltage of amplifier normal phase input end and inverting input in the overheat protector control integrated circuit of the present utility model.
Say that especially this overheat protector control integrated circuit also comprises: above-mentioned thermistor is a negative tempperature coefficient thermistor, and its rising resistance with temperature diminishes.
Before this overheat protector control integrated circuit formation is set; measure the maximum temperature of external device when operate as normal that this overheat protector control integrated circuit is linked to each other earlier; this temperature is critical temperature; when meeting or exceeding this critical temperature; external device is can Yin Wendu too high and make its internal partial assembly burn out cisco unity malfunction, selects the resistance of thermistor, first resistance, second resistance, the 3rd resistance by this critical temperature.
When supply power voltage begins to power, this overheat protector control integrated circuit each several part components and parts inside has electric current to pass through, operate as normal, increase along with the time, the each several part components and parts can produce a lot of heats, the temperature of itself is raise, the resistance temperature rising of thermistor reduces with the rising of temperature, it is that amplifier's inverting input voltage increases that electric current increases the voltage that makes the resistance two ends of winning, and the resistance of second resistance and the 3rd resistance is constant, so the voltage at the 3rd resistance two ends is that the normal phase input end voltage of amplifier is also constant, when the temperature that raises does not reach above-mentioned critical temperature, the normal phase input end voltage of amplifier can be greater than inverting input voltage, makes that the control signal of output output of amplifier is a positive voltage signal, and this positive voltage signal can be opened external device and be made its operate as normal like this; The heat that can produce when these overheat protector control integrated circuit each several part components and parts reaches the temperature of itself or when being higher than above-mentioned critical temperature; amplifier's inverting input voltage is greater than normal phase input end voltage; the control signal of the output of amplifier output is a low-voltage signal like this; this low-voltage signal can be closed external device, and it is quit work.
[description of drawings]
Fig. 1 illustrates the circuit diagram of overheat protector control integrated circuit of the present utility model.
[embodiment]
With reference to Fig. 1, it is the circuit diagram of overheat protector control integrated circuit of the present utility model.
Overheat protector control integrated circuit of the present utility model comprises:
One supply power voltage 1, it provides the operating voltage of integrated circuit;
One thermistor 2, its input electrically connects the output of above-mentioned supply power voltage 1, this thermistor 2 is a negative tempperature coefficient thermistor, its rising resistance with temperature diminishes, and this thermistor 2 utilizes the resistance of variation of temperature change itself to change the size of electric current in the circuit simultaneously and then changes the size of each voltage in the circuit;
One first resistance 3, its input electrically connects the output of above-mentioned thermistor 2, the output head grounding of this first resistance 3;
One second resistance 4, its input and the input of thermistor 2 are connected the output of above-mentioned supply power voltage 1 together;
One the 3rd resistance 5, its input electrically connects the output of above-mentioned second resistance 4, the output head grounding of the 3rd resistance 5;
One amplifier 6, its normal phase input end electrically connects the output of above-mentioned second resistance 4, and inverting input electrically connects the output of above-mentioned thermistor 2, and what the output of this amplifier 6 was exported is control signal;
One external device 7, its output with amplifier 6 is connected.
In present embodiment, first resistance 3, second resistance 4, the 3rd resistance 5 are used to draw the reference voltage of amplifier 6 normal phase input ends and inverting input in the overheat protector control integrated circuit of the present utility model.
Before this overheat protector control integrated circuit formation is set; measure the maximum temperature of external device 7 when operate as normal that this overheat protector control integrated circuit is linked to each other earlier; this temperature is critical temperature; when meeting or exceeding this critical temperature; external device 7 is can Yin Wendu too high and make its internal partial assembly burn out cisco unity malfunction, selects the resistance of thermistor 2, first resistance 3, second resistance 4, the 3rd resistance 5 by this critical temperature.
When supply power voltage 1 begins to power, voltage has been executed at these overheat protector control integrated circuit each several part components and parts two ends, inside has electric current to pass through, operate as normal, increase along with the time, the each several part components and parts can produce a lot of heats, the temperature of itself is raise, the resistance temperature rising of thermistor 2 reduces with the rising of temperature, electric current increases the voltage (being the inverting input voltage of amplifier 6) that makes resistance 3 two ends of winning and increases, and the resistance of second resistance 4 and the 3rd resistance 5 is constant, so the voltage at the 3rd resistance 5 two ends (being the normal phase input end voltage of amplifier 6) is also constant, when the temperature that raises does not reach above-mentioned critical temperature, the normal phase input end voltage of amplifier 6 can be greater than inverting input voltage, make that the control signal of output output of amplifier 6 is a positive voltage signal, this positive voltage signal can be opened external device 7 and be made its operate as normal like this; The heat that can produce when these overheat protector control integrated circuit each several part components and parts reaches the temperature of itself or when being higher than above-mentioned critical temperature; amplifier's inverting input voltage is greater than normal phase input end voltage; the control signal of the output of amplifier 6 output is a low-voltage signal like this; this low-voltage signal can be closed external device 7, and it is quit work.
Claims (2)
1, a kind of overheat protector control integrated circuit is characterized in that, this overheat protector control integrated circuit comprises:
One supply power voltage, it provides the operating voltage of integrated circuit;
One thermistor, its input electrically connects the output of above-mentioned supply power voltage, and this thermistor utilizes the resistance of variation of temperature change itself to change the size of electric current in the circuit simultaneously and then changes the size of each voltage in the circuit;
One first resistance, its input electrically connects the output of above-mentioned thermistor, and the output head grounding of this first resistance is used to draw the reference voltage of inverting input;
One second resistance, the input of its input and thermistor is connected the output of above-mentioned supply power voltage together, is used to draw the reference voltage of amplifier normal phase input end;
One the 3rd resistance, its input electrically connects the output of above-mentioned second resistance, the output head grounding of the 3rd resistance;
One amplifier, its normal phase input end electrically connects the output of above-mentioned second resistance, and inverting input electrically connects the output of above-mentioned thermistor, and what the output of this amplifier was exported is control signal, is used for controlling external device;
One external device, it is connected with the output of amplifier.
2, overheat protector control integrated circuit as claimed in claim 1 is characterized in that, this overheat protector control integrated circuit also comprises: above-mentioned thermistor is a negative tempperature coefficient thermistor, and its rising resistance with temperature diminishes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200446031U CN201171156Y (en) | 2008-03-07 | 2008-03-07 | Control integrated circuit for over temperature protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200446031U CN201171156Y (en) | 2008-03-07 | 2008-03-07 | Control integrated circuit for over temperature protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201171156Y true CN201171156Y (en) | 2008-12-24 |
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ID=40210206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200446031U Expired - Fee Related CN201171156Y (en) | 2008-03-07 | 2008-03-07 | Control integrated circuit for over temperature protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201171156Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102290784A (en) * | 2010-06-17 | 2011-12-21 | 鸿富锦精密工业（深圳）有限公司 | High-temperature protective circuit |
| CN104235803A (en) * | 2013-06-14 | 2014-12-24 | 海洋王（东莞）照明科技有限公司 | Lamp with active heat dissipating device |
| CN106602513A (en) * | 2017-01-13 | 2017-04-26 | 顺丰科技有限公司 | Short circuit protection charging interface and control method thereof |
-
2008
- 2008-03-07 CN CNU2008200446031U patent/CN201171156Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102290784A (en) * | 2010-06-17 | 2011-12-21 | 鸿富锦精密工业（深圳）有限公司 | High-temperature protective circuit |
| CN104235803A (en) * | 2013-06-14 | 2014-12-24 | 海洋王（东莞）照明科技有限公司 | Lamp with active heat dissipating device |
| CN106602513A (en) * | 2017-01-13 | 2017-04-26 | 顺丰科技有限公司 | Short circuit protection charging interface and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081224 Termination date: 20130307 |