CN207853869U - A kind of optocoupler driving chip - Google Patents
A kind of optocoupler driving chip Download PDFInfo
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- CN207853869U CN207853869U CN201820183678.1U CN201820183678U CN207853869U CN 207853869 U CN207853869 U CN 207853869U CN 201820183678 U CN201820183678 U CN 201820183678U CN 207853869 U CN207853869 U CN 207853869U
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- 239000000126 substance Substances 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 abstract description 6
- 230000003321 amplification Effects 0.000 description 5
- 239000013078 crystal Substances 0.000 description 5
- 238000003199 nucleic acid amplification method Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
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Abstract
The utility model discloses a kind of optocoupler driving chip, control chip includes driving circuit；Driving circuit includes the first transistor, second transistor, third transistor and the 4th transistor；Further include first resistor and second resistance；The emitter of second transistor connects the emitter of the 4th transistor；The base stage of the collector connection the first transistor of second transistor；The collector of the base stage connection the first transistor of second transistor；The emitter of the emitter connection third transistor of the first transistor；The collector of the base stage connection third transistor of 4th transistor；The base stage of the collector connection third transistor of 4th transistor；The collector of second transistor connects the base stage of the 4th transistor.Optical receiving circuit in the alternative traditional photoelectric coupled circuit of driving circuit disclosed by the utility model, has the characteristics that driving current is big, driving capability is strong, in addition, the circuit can be directly connected to the alternating voltage of 220V, simplifies optocoupler driving circuit.
Description
Technical field
The present invention relates to photoelectric coupled circuits, and in particular to a kind of optocoupler driving chip.
Background technology
In the prior art, existing photoelectric coupled circuit mainly has following two：
1, as shown in Figure 1.Fig. 1 is a diode-triode photoelectrical coupler, is that light emitting diode is used to be sent out as light
End is penetrated, the base area of another triode is as optical receiving end.Wherein light emitting diode is the input terminal of photoelectrical coupler.
2, as shown in Fig. 2, being to use Light-emitting diode LED as light emitting end, another silicon-controlled gate leve is as light
Receiving terminal.
It is in place of the deficiencies in the prior art：The electric current that optical receiving end generates in the prior art is small, and driving capability is insufficient, does not have
There is method to directly drive the devices such as the big device of rear end, such as silicon-controlled, power MOSFET, power IGBT；Voltage endurance capability is poor, does not have
There is method to be directly connected in the AC power of 220V, it otherwise can be breakdown.It in the prior art, must in order to overcome at this 2 points
Complicated external circuit must be added.
Invention content
In view of the deficiencies of the prior art, the present invention proposes a kind of optocoupler driving chip.
Technical scheme is as follows：
A kind of optocoupler driving chip, including driving circuit；Driving circuit includes the first transistor, second transistor,
Three transistors and the 4th transistor；Further include first resistor and second resistance；The first transistor and the 4th transistor are positive-negative-positive crystalline substances
Body pipe；Second transistor and third transistor are NPN transistors；The emitter of second transistor connects the hair of the 4th transistor
Emitter-base bandgap grading；The base stage of the collector connection the first transistor of second transistor；The base stage connection the first transistor of second transistor
Collector；The emitter of the emitter connection third transistor of the first transistor；The base stage of 4th transistor connects third crystal
The collector of pipe；The base stage of the collector connection third transistor of 4th transistor；The collector connection the 4th of second transistor
The base stage of transistor；The both ends of first resistor are separately connected the base stage and emitter of second transistor；The both ends of second resistance point
Not Lian Jie third transistor base stage and emitter.
Its further technical solution is：The emitter area of the emitter of the first transistor and the 4th transistor is 10 μ
m2~1000 μm2。
Its further technical solution is：The emitter of second transistor and the emitter area of third transistor are 10 μ
m2~2000 μm2。
Its further technical solution is：The resistance value of first resistor and second resistance is 500 Ω~1M Ω.
The method have the benefit that：
The invention discloses a kind of optocoupler driving chips, including driving circuit, the alternative tradition of the driving circuit
Optical receiving circuit in photoelectric coupled circuit has the characteristics that driving current is big, driving capability is strong, in addition, the circuit can be directly connected to
The alternating voltage of 220V simplifies optocoupler driving circuit.
The circuit is very sensitive, and the reaction time is fast, generally within several microseconds.
Description of the drawings
Fig. 1 is a kind of photoelectrical coupler in the prior art.
Fig. 2 is another photoelectrical coupler in the prior art.
Fig. 3 is the circuit diagram of the present invention.
Fig. 4 is the test circuit figure of the present invention.
Fig. 5 is the port voltage figure that driving circuit adds 220V alternating currents.
Fig. 6 is different the current conditions in circuit under base stage area.
Specific implementation mode
Fig. 3 is the circuit diagram of the present invention.As shown in figure 3, the sensitive control chip of light includes driving circuit.Driving circuit includes
The first transistor Q1, second transistor Q2, third transistor Q3 and the 4th transistor Q4.It further include the electricity of first resistor R1 and second
Hinder R2.The first transistor Q1 and the 4th transistor Q4 is PNP transistor.Second transistor Q2 and third transistor Q3 is NPN
Transistor npn npn.The emitter of second transistor Q2 connects the emitter of the 4th transistor Q4.The collector of second transistor Q2 connects
Connect the base stage of the first transistor Q1.The collector of the base stage connection the first transistor Q1 of second transistor Q2.The first transistor Q1
Emitter connection third transistor Q3 emitter.The collector of the base stage connection third transistor Q3 of 4th transistor Q4.
The base stage of the collector connection third transistor Q3 of 4th transistor Q4.The collector of second transistor Q2 connects the 4th transistor
The base stage of Q4.The both ends of first resistor R1 are separately connected the base stage and emitter of second transistor Q2.The both ends of second resistance R2
It is separately connected the base stage and emitter of third transistor Q3.
The emitter area of the emitter of the first transistor Q1 and the 4th transistor Q4 are 10 μm2~1000 μm2。
The emitter of second transistor Q2 and the emitter area of third transistor Q3 are 10 μm2~2000 μm2。
The resistance value of first resistor R1 and second resistance R2 are 500 Ω~1M Ω.
Fig. 4 is the test circuit figure of the present invention.As shown in figure 4, the emitter and third transistor Q3 of the first transistor Q1
Emitter common end as port 1, the common end of the emitter of the emitter of second transistor Q2 and the 4th transistor Q4
As port 5, the AC power AC of 220V is added between port 1 and port 5.
As shown in figure 4, the first transistor Q1, second transistor Q2 and first resistor R1 form a half circuit, third crystal
Another half circuit of pipe Q3, the 4th transistor Q4 and second resistance R2 compositions.One half circuit and another half circuit are from beginning to end, structure
At entire circuit.The circuit directly meets alternating voltage AC.
When alternating voltage is in positive half cycle, when thering is light to be incident in circuit, the base of second transistor Q2
The base stage of pole or the first transistor Q1 generate base current.
When the base stage of the first transistor Q1 generates base current, the base current of the first transistor Q1 passes through first crystal
After pipe Q1 amplifications, exported from the collector of the first transistor Q1 to the base stage of second transistor Q2, the base stage of second transistor Q2
Electric current increases.The base current of second transistor Q2 is after the amplification of second transistor Q2, from the current collection of second transistor Q2
Pole is exported to the base stage of the first transistor Q1, and the electric current of the base stage of the first transistor Q1 increases.By repeatedly recycling, electric current becomes
Greatly, so that the circuit is opened.It thereby realizes and controls the control that entire circuit is opened with faint optical signal.
When the base stage of second transistor Q2 generates base current, principle and the first transistor that current cycle increases
The principle that current cycle increases when the base stage of Q1 generates base current is identical.
When alternating voltage is in negative half period when thering is light to be incident in circuit, the base of third transistor Q3
The base stage of pole or the 4th transistor Q4 generate base current.
When the base stage of third transistor Q3 generates base current, the base current of third transistor Q3 passes through third crystal
After pipe Q3 amplifications, exported from the collector of third transistor Q3 to the base stage of the 4th transistor Q4, the base stage of the 4th transistor Q4
Electric current increases.The base current of 4th transistor Q4 is after the amplification of the 4th transistor Q4, from the current collection of the 4th transistor Q4
Pole is exported to the base stage of third transistor Q3, and the base current of third transistor Q3 increases.By repeatedly recycling, electric current becomes larger,
So that the circuit is opened.
When the base stage of the 4th transistor Q4 generates base current, principle and four or three transistor that current cycle increases
The principle that current cycle increases when the base stage of Q3 generates base current is identical.
So circuit of the present invention allows for, and in the case where no matter circuit adds positive voltage or negative voltage, entire electricity
It road can be in time into the control response of traveling optical signal.
Fig. 5 is the port voltage figure that driving circuit adds 220V alternating currents.As shown in figure 5, adding between port 1 and port 5
The AC power AC of upper 220V.
Fig. 6 is different the current conditions in circuit under base stage area.There are multiple and different curves, five songs in figure 6
Line represent different base stage areas in the case of port 1 current conditions.The light receiving part of this driving circuit is the second crystal
The base portion of pipe Q2 and the 4th transistor Q4, since driving circuit has amplification, so base stage can do it is very small.And
As seen from Figure 6, different base stage areas, the electric current for not influencing circuit are corresponding.As can be seen that the circuit is very sensitive, nothing
By great base stage area, can trigger quickly.
What has been described above is only a preferred embodiment of the present invention, and present invention is not limited to the above embodiments.It is appreciated that this
The other improvements and change that field technology personnel directly export or associate without departing from the spirit and concept in the present invention
Change, is considered as being included within protection scope of the present invention.
Claims (4)
1. a kind of optocoupler driving chip, it is characterised in that：Including driving circuit；Driving circuit include the first transistor (Q1),
Second transistor (Q2), third transistor (Q3) and the 4th transistor (Q4)；Further include first resistor (R1) and second resistance
(R2)；The first transistor (Q1) and the 4th transistor (Q4) are PNP transistors；Second transistor (Q2) and third transistor
(Q3) it is NPN transistor；The emitter of second transistor (Q2) connects the emitter of the 4th transistor (Q4)；Second transistor
(Q2) base stage of collector connection the first transistor (Q1)；The base stage connection the first transistor (Q1) of second transistor (Q2)
Collector；The emitter of the emitter connection third transistor (Q3) of the first transistor (Q1)；The base stage of 4th transistor (Q4)
Connect the collector of third transistor (Q3)；The base stage of the collector connection third transistor (Q3) of 4th transistor (Q4)；The
The collector of two-transistor (Q2) connects the base stage of the 4th transistor (Q4)；The both ends of first resistor (R1) are separately connected the second crystalline substance
The base stage and emitter of body pipe (Q2)；The both ends of second resistance (R2) are separately connected base stage and the transmitting of third transistor (Q3)
Pole.
2. optocoupler driving chip as described in claim 1, it is characterised in that：The emitter and the 4th of the first transistor (Q1)
The emitter area of transistor (Q4) is 10 μm2~1000 μm2。
3. optocoupler driving chip as described in claim 1, it is characterised in that：The emitter and third of second transistor (Q2)
The emitter area of transistor (Q3) is 10 μm2~2000 μm2。
4. optocoupler driving chip as described in claim 1, it is characterised in that：First resistor (R1) and second resistance (R2)
Resistance value is 500 Ω~1M Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820183678.1U CN207853869U (en) | 2018-02-01 | 2018-02-01 | A kind of optocoupler driving chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820183678.1U CN207853869U (en) | 2018-02-01 | 2018-02-01 | A kind of optocoupler driving chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207853869U true CN207853869U (en) | 2018-09-11 |
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ID=63410408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820183678.1U Withdrawn - After Issue CN207853869U (en) | 2018-02-01 | 2018-02-01 | A kind of optocoupler driving chip |
Country Status (1)
| Country | Link |
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| CN (1) | CN207853869U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108322206A (en) * | 2018-02-01 | 2018-07-24 | 无锡豪帮高科股份有限公司 | A kind of sensitive control chip of light and control method |
-
2018
- 2018-02-01 CN CN201820183678.1U patent/CN207853869U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108322206A (en) * | 2018-02-01 | 2018-07-24 | 无锡豪帮高科股份有限公司 | A kind of sensitive control chip of light and control method |
| CN108322206B (en) * | 2018-02-01 | 2024-04-02 | 无锡豪帮高科股份有限公司 | Light sensitivity control chip and control method |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180911 Effective date of abandoning: 20240402 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180911 Effective date of abandoning: 20240402 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |