CN107634505A - A kind of electronic equipment with protection circuit - Google Patents
A kind of electronic equipment with protection circuit Download PDFInfo
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- CN107634505A CN107634505A CN201710935136.5A CN201710935136A CN107634505A CN 107634505 A CN107634505 A CN 107634505A CN 201710935136 A CN201710935136 A CN 201710935136A CN 107634505 A CN107634505 A CN 107634505A
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Abstract
The invention discloses a kind of electronic equipment with protection circuit, including chip IC 1, the pin 4 of the chip IC 1 is connected to voltage-regulator diode D2 positive pole, FET M2 grid G, resistance R2 one end, electric capacity C1 one end, voltage-regulator diode D1 negative pole, FET M1 source S and resistance R4 one end, voltage-regulator diode D1 positive pole is connected to FET M1 grid G, power supply U negative pole and resistance R1 one end, power supply U positive pole is connected with FET M1 drain D, voltage-regulator diode D2 negative pole is connected with FET M2 source S, FET M2 drain D is connected to the positive pole of battery, the pin 8 of chip IC 1, electric capacity C2 one end and the pin 5 of chip IC 1.The present invention is easy to use, overheat protector is carried out to chip IC 1 using temperature protection circuit can, simple economy is practical.
Description
Technical field
The present invention relates to technical field of electronic equipment, more particularly to a kind of electronic equipment with protection circuit.
Background technology
Many electronic equipments currently on the market have individual rated current, do not allow more than rated current, not so can burn out
Equipment, so some equipment have just done overcurrent protection module, when electric current exceedes setting electric current, equipment automatically powers off, to protect
Equipment is protected, there are usb overcurrent protections as mainboard usb, protects mainboard not to be burned.
The patent document of Application No. 201510694090.3 provides a kind of electronic equipment protection circuit, and its solution is existing
Electronic equipment complex circuit designs, efficiency it is low, it is impossible to realize that protection during curtage exception causes electronics well
The problem of shortened equipment life, but when electronic equipment in charging or when in use, it is too high and cause to may result in temperature
Electronic equipment is damaged, so it is proposed that a kind of electronic equipment with protection circuit is set forth above to solve the problems, such as.
The content of the invention
Based on technical problem existing for background technology, the present invention proposes a kind of electronic equipment with protection circuit.
A kind of electronic equipment with protection circuit proposed by the present invention, including chip IC 1, the pin 4 of the chip IC 1
It is connected to voltage-regulator diode D2 positive pole, FET M2 grid G, resistance R2 one end, electric capacity C1 one end, voltage stabilizing
One end of diode D1 negative pole, FET M1 source S and resistance R4, voltage-regulator diode D1 positive pole are connected to field
One end of effect pipe M1 grid G, power supply U negative pole and resistance R1, power supply U positive pole are connected with FET M1 drain D,
Voltage-regulator diode D2 negative pole is connected with FET M2 source S, and FET M2 drain D is being connected to battery just
Pole, the pin 8 of chip IC 1, the pin 5 of electric capacity C2 one end and chip IC 1, the negative pole of battery are connected to chip IC 1
The other end of pin 1 and electric capacity C2, the pin 2 of the IC1 are connected with resistance R3 one end, the other end difference of the resistance R2
The positive pole of diode (LED) 1 and the positive pole of diode (LED) 2 are connected with, the negative pole of diode (LED) 2 is connected to chip IC 1
One end of pin 7, the output end of operational amplifier A and resistance R8, the negative pole of diode (LED) 1 are connected to the another of resistance R8
One end, the pin 6 of chip IC 1, the pin 5 of operational amplifier A, resistance R6 one end and resistance R5 one end, operational amplifier A
Negative input end be connected to the resistance R5 other end and resistance R7 one end, the positive input terminal of operational amplifier A connects respectively
It is connected to the resistance R6 other end and adjustable resistance RT one end.
Preferably, the resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7 and resistance R8
Resistance is followed successively by 1.5K Ω, 1.5K Ω, 2.4K Ω, 2.4K Ω, 10K Ω, 15K Ω, 15K Ω, 10K Ω.
Preferably, the resistance of the adjustable resistance Rt is 1.0K Ω to 1000K Ω.
Preferably, the capacitance of the electric capacity C1 and electric capacity C2 are respectively 220uF, 220uF.
Preferably, the other end of the electric capacity C1, the resistance R1 other end, the resistance R4 other end, electric capacity C2 it is another
End, the pin 4 of the pin 3 of the resistance R3 other end, chip IC 1, operational amplifier A, adjustable resistance the Rt other end and resistance
The R7 other end is grounded.
Preferably, the model CN3068 of the chip IC 1, and the model LM330 of operational amplifier A.
Preferably, the glow color of the diode (LED) 1 and diode (LED) 2 is respectively green and red.
Preferably, the model of the FET M1 and FET M2 are SI2301, voltage-regulator diode D1 and voltage stabilizing
Diode D2 model is 1N5817.
The beneficial effects of the invention are as follows：It is engaged, is collectively formed by FET M2, resistance R4 and voltage-regulator diode D2
Late-class circuit, power supply can be powered to late-class circuit, and battery can also be powered to late-class circuit, pass through resistance
R5, resistance R6, resistance R7, resistance R8, adjustable resistance Rt and operational amplifier A are engaged, and together constitute temperature detection protection
Circuit, the temperature of chip IC 1 can be detected using temperature protection circuit and chip IC 1 is protected, the present invention makes
With conveniently, overheat protector is carried out to chip IC 1 using temperature protection circuit can, simple economy is practical.
Brief description of the drawings
Fig. 1 is a kind of circuit diagram of the electronic equipment with protection circuit proposed by the present invention.
Embodiment
The present invention is made with reference to specific embodiment further to explain.
Embodiment
With reference to figure 1, a kind of electronic equipment with protection circuit, including chip IC 1, chip are proposed in the present embodiment
IC1 pin 4 is connected to voltage-regulator diode D2 positive pole, FET M2 grid G, resistance R2 one end, electric capacity C1
One end, voltage-regulator diode D1 negative pole, FET M1 source S and resistance R4 one end, voltage-regulator diode D1 positive pole
One end of FET M1 grid G, power supply U negative pole and resistance R1 is connected to, power supply U positive pole is connected with field-effect
Pipe M1 drain D, voltage-regulator diode D2 negative pole are connected with FET M2 source S, and FET M2 drain D connects respectively
The positive pole of battery, the pin 8 of chip IC 1, electric capacity C2 one end and the pin 5 of chip IC 1 are connected to, the negative pole of battery connects respectively
There are the pin 1 of chip IC 1 and the electric capacity C2 other end, IC1 pin 2 is connected with resistance R3 one end, the resistance R2 other end
The positive pole of diode (LED) 1 and the positive pole of diode (LED) 2 are connected to, the negative pole of diode (LED) 2 is connected to chip
One end of IC1 pin 7, the output end of operational amplifier A and resistance R8, the negative pole of diode (LED) 1 are connected to resistance R8
The other end, the pin 6 of chip IC 1, the pin 5 of operational amplifier A, resistance R6 one end and resistance R5 one end, computing puts
Big device A negative input end is connected to the resistance R5 other end and resistance R7 one end, the positive input terminal point of operational amplifier A
The resistance R6 other end and adjustable resistance RT one end are not connected with, if in charging, electric current first passes through FET M1's
Drain D, then flowed out from FET M1 source S, then by resistance R2 and diode (LED) 2, and diode (LED) 2 is sent
Feux rouges, expression are being charged now, and when being charged, power supply will be powered to late-class circuit and battery, electricity now
Pond is not discharged, and when the current is switched off, diode (LED) 2 will stop bright light, and battery proceeds by work and discharged, now after
Level circuit is powered using battery, utilizes resistance R5, resistance R6, resistance R7, resistance R8, adjustable resistance Rt and operational amplifier
The temperature detection protection circuit that A is formed can detect to chip IC 1, because the both ends of excess temperature detection protection circuit connect respectively
It is connected on the pin 6 of chip IC 1 and the pin 7 of chip IC 1, so when electronic equipment is operated, thermal-shutdown circuit is just
It can be operated, and start to detect chip, when temperature is too high, thermal-shutdown circuit will be disconnected by chip IC 1
Electric current, so as to protect chip IC 1 not damage, under scene effect pipe M2, resistance R4 and voltage-regulator diode D2 cooperation, jointly
Late-class circuit is constituted, power supply can be powered to late-class circuit, and battery can also be powered to late-class circuit, in resistance
R5, resistance R6, resistance R7, resistance R8, adjustable resistance Rt and operational amplifier A cooperation under, together constitute temperature detection guarantor
Protection circuit, the temperature of chip IC 1 can be detected using temperature protection circuit and chip IC 1 is protected, the present invention
It is easy to use, overheat protector is carried out to chip IC 1 using temperature protection circuit can, simple economy is practical.
In the present embodiment, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7 and resistance R8
Resistance is followed successively by 1.5K Ω, 1.5K Ω, 2.4K Ω, 2.4K Ω, 10K Ω, 15K Ω, 15K Ω, 10K Ω, adjustable resistance Rt resistance
The capacitance being worth for 1.0K Ω to 1000K Ω, electric capacity C1 and electric capacity C2 is respectively 220uF, 220uF, electric capacity the C1 other end, resistance
The R1 other end, the resistance R4 other end, the electric capacity C2 other end, the resistance R3 other end, the pin 3 of chip IC 1, computing are put
Big device A pin 4, the adjustable resistance Rt other end and the resistance R7 other end is grounded, the model CN3068 of chip IC 1,
And the model LM330 of operational amplifier A, the glow color of diode (LED) 1 and diode (LED) 2 are respectively green and red,
FET M1 and FET M2 model are that SI2301, voltage-regulator diode D1 and voltage-regulator diode D2 model are
1N5817, under scene effect pipe M2, resistance R4 and voltage-regulator diode D2 cooperation, together constitute late-class circuit, power supply can be with
It is powered to late-class circuit, battery can also be powered to late-class circuit, in resistance R5, resistance R6, resistance R7, resistance
Under R8, adjustable resistance Rt and operational amplifier A cooperation, temperature detection protection circuit is together constituted, utilizes temperature protection electricity
Road can be detected to the temperature of chip IC 1 and chip IC 1 is protected, and the present invention is easy to use, utilizes temperature protection
Circuit can carries out overheat protector to chip IC 1, and simple economy is practical.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (8)
1. a kind of electronic equipment with protection circuit, including chip IC 1, it is characterised in that the pin 4 of the chip IC 1 divides
Voltage-regulator diode D2 positive pole, FET M2 grid G, resistance R2 one end, electric capacity C1 one end, voltage stabilizing two are not connected with
One end of pole pipe D1 negative pole, FET M1 source S and resistance R4, voltage-regulator diode D1 positive pole are connected to field effect
Should pipe M1 grid G, power supply U negative pole and resistance R1 one end, power supply U positive pole is connected with FET M1 drain D, surely
Pressure diode D2 negative pole is connected with FET M2 source S, and FET M2 drain D is being connected to battery just
Pole, the pin 8 of chip IC 1, the pin 5 of electric capacity C2 one end and chip IC 1, the negative pole of battery are connected to chip IC 1
The other end of pin 1 and electric capacity C2, the pin 2 of the IC1 are connected with resistance R3 one end, the other end difference of the resistance R2
The positive pole of diode (LED) 1 and the positive pole of diode (LED) 2 are connected with, the negative pole of diode (LED) 2 is connected to chip IC 1
One end of pin 7, the output end of operational amplifier A and resistance R8, the negative pole of diode (LED) 1 are connected to the another of resistance R8
One end, the pin 6 of chip IC 1, the pin 5 of operational amplifier A, resistance R6 one end and resistance R5 one end, operational amplifier A
Negative input end be connected to the resistance R5 other end and resistance R7 one end, the positive input terminal of operational amplifier A connects respectively
It is connected to the resistance R6 other end and adjustable resistance RT one end.
2. a kind of electronic equipment with protection circuit according to claim 1, it is characterised in that the resistance R1, electricity
The resistance for hindering R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7 and resistance R8 is followed successively by 1.5K Ω, 1.5K Ω, 2.4K
Ω、2.4KΩ、10KΩ、15KΩ、15KΩ、10KΩ。
A kind of 3. electronic equipment with protection circuit according to claim 1, it is characterised in that the adjustable resistance Rt
Resistance be 1.0K Ω to 1000K Ω.
4. a kind of electronic equipment with protection circuit according to claim 1, it is characterised in that the electric capacity C1 and electricity
The capacitance for holding C2 is respectively 220uF, 220uF.
5. a kind of electronic equipment with protection circuit according to claim 1, it is characterised in that the electric capacity C1's is another
One end, the resistance R1 other end, the resistance R4 other end, the electric capacity C2 other end, the resistance R3 other end, chip IC 1 are drawn
Pin 3, the pin 4 of operational amplifier A, the adjustable resistance Rt other end and resistance the R7 other end are grounded.
6. a kind of electronic equipment with protection circuit according to claim 1, it is characterised in that the chip IC 1
Model CN3068, and the model LM330 of operational amplifier A.
A kind of 7. electronic equipment with protection circuit according to claim 1, it is characterised in that the diode (LED) 1
It is different with the glow color of diode (LED) 2.
A kind of 8. electronic equipment with protection circuit according to claim 1, it is characterised in that the FET M1
Model with FET M2 is that SI2301, voltage-regulator diode D1 and voltage-regulator diode D2 model are 1N5817.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710935136.5A CN107634505B (en) | 2017-10-10 | 2017-10-10 | A kind of electronic equipment with protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710935136.5A CN107634505B (en) | 2017-10-10 | 2017-10-10 | A kind of electronic equipment with protection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107634505A true CN107634505A (en) | 2018-01-26 |
| CN107634505B CN107634505B (en) | 2019-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710935136.5A Active CN107634505B (en) | 2017-10-10 | 2017-10-10 | A kind of electronic equipment with protection circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN107634505B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104104058A (en) * | 2014-07-22 | 2014-10-15 | Tcl通讯（宁波）有限公司 | Temperature protection device of power management chip and mobile terminal |
| CN204012657U (en) * | 2014-07-25 | 2014-12-10 | 万源市海铝科技有限公司 | A kind of thermal-shutdown circuit of chip |
| CN204256501U (en) * | 2014-11-23 | 2015-04-08 | 卢立群 | A kind of potted landscape growing environment automatic detection and control system |
| CN104577996A (en) * | 2014-12-26 | 2015-04-29 | 东莞钜威新能源有限公司 | Power supply over-current protection circuit based on integrated circuit |
| CN204732855U (en) * | 2015-07-22 | 2015-10-28 | 金陵科技学院 | A kind of motor over-temperature controller |
| CN204905979U (en) * | 2015-09-14 | 2015-12-23 | 重庆科创职业学院 | On -vehicle charging circuit structure based on microcomputer chip control |
| CN106207966A (en) * | 2016-07-18 | 2016-12-07 | 电子科技大学 | A kind of thermal-shutdown circuit |
| CN206471805U (en) * | 2017-02-24 | 2017-09-05 | 广州达众计算机科技有限公司 | A kind of POS printer overtemperature protection system |
-
2017
- 2017-10-10 CN CN201710935136.5A patent/CN107634505B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104104058A (en) * | 2014-07-22 | 2014-10-15 | Tcl通讯（宁波）有限公司 | Temperature protection device of power management chip and mobile terminal |
| CN204012657U (en) * | 2014-07-25 | 2014-12-10 | 万源市海铝科技有限公司 | A kind of thermal-shutdown circuit of chip |
| CN204256501U (en) * | 2014-11-23 | 2015-04-08 | 卢立群 | A kind of potted landscape growing environment automatic detection and control system |
| CN104577996A (en) * | 2014-12-26 | 2015-04-29 | 东莞钜威新能源有限公司 | Power supply over-current protection circuit based on integrated circuit |
| CN204732855U (en) * | 2015-07-22 | 2015-10-28 | 金陵科技学院 | A kind of motor over-temperature controller |
| CN204905979U (en) * | 2015-09-14 | 2015-12-23 | 重庆科创职业学院 | On -vehicle charging circuit structure based on microcomputer chip control |
| CN106207966A (en) * | 2016-07-18 | 2016-12-07 | 电子科技大学 | A kind of thermal-shutdown circuit |
| CN206471805U (en) * | 2017-02-24 | 2017-09-05 | 广州达众计算机科技有限公司 | A kind of POS printer overtemperature protection system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107634505B (en) | 2019-03-29 |
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