CN103683254A - Lightning protection circuit with high reliability - Google Patents
Lightning protection circuit with high reliability Download PDFInfo
- Publication number
- CN103683254A CN103683254A CN201310612421.5A CN201310612421A CN103683254A CN 103683254 A CN103683254 A CN 103683254A CN 201310612421 A CN201310612421 A CN 201310612421A CN 103683254 A CN103683254 A CN 103683254A
- Authority
- CN
- China
- Prior art keywords
- triode
- port
- lightning
- resistance
- protection circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a lightning protection circuit with high reliability. The lightning protection circuit comprises a port A, a port B, a triode T1 and a triode T2. An emitting electrode of the triode T1 is connected onto a power source, a collector electrode of the triode T1 is connected onto a collector electrode of the triode T2, both a base electrode of the triode T1 and a base electrode of the triode T2 are connected onto the port A, an emitting electrode of the triode T2 is grounded, an emitting electrode of the triode T1 is connected onto a collector electrode of a triode T3, a base electrode of the triode T3 is connected onto an emitting electrode by a resistor R1, the emitting electrode is grounded, the collector electrode of the triode T1 is connected onto the port B by a resistor R2, and a secondary lightning discharge circuit is connected onto the port B. The lightning protection circuit has the advantages that the lightning protection circuit is connected onto a power port of electric equipment, so that a reliable channel can be provided for discharging lightning, the lightning can be discharged, and accordingly the electric equipment can be prevented from invaded by the lightning.
Description
Technical field
The present invention relates to integrated circuit fields, relate in particular the lightning protection circuit that reliability is high.
Background technology
In thunderstorm in summer multiple season, thunderstorm often occurs.Due to thunder and lightning, institute is with voltage very high, is about 100,000,000 to 1,000,000,000 volts, and its destructive power to equipment is extremely strong.In home appliance, because home appliance is mostly always in power supply connection status, thunderstorm season, home appliance is very easily subject to the invasion and attack of thunder and lightning.The lightning protection measures of home appliance is generally to adopt earthing mode, be that power line adopts Three-hole socket to realize reliable ground thunder and lightning is prevented, still, it can not well realize releasing to thunder and lightning, electric equipment is when being subject to thunder and lightning invasion and attack, and the phenomenon that home appliance is destroyed happens occasionally.
Summary of the invention
The invention provides the lightning protection circuit that reliability is high, it is connected on the power port of electric equipment, for releasing of thunder and lightning provides reliable channel, thunder and lightning is released, and avoids electric equipment attacked by thunder and lightning.
For solving above-mentioned technical problem, the present invention by the following technical solutions:
The lightning protection circuit that reliability is high, it comprises port A, port B, triode T1 and triode T2, the emitter of described triode T1 is connected on power supply, the collector electrode of described triode T1 is connected on the collector electrode of triode T2, the base stage of described triode T1 and the base stage of triode T2 are all connected on port A, the grounded emitter of described triode T2, the emitter of described triode T1 is connected on the collector electrode of triode T3, the base stage of described triode T3 is connected on emitter and grounded emitter by resistance R 1, the collector electrode of described triode T1 is connected on port B by resistance R 2, on described port B, be connected with second level thunder and lightning leadage circuit.
Further technical scheme is:
As preferably, described second level thunder and lightning leadage circuit comprises diode D1 and diode D2, the anode of described diode D1 is connected with the anode of diode D2 with port B simultaneously, and the negative electrode of described diode D1 is connected on power supply, the minus earth of described diode D2.
Further, between described triode T1 and port A, be connected with resistance R 1, between described triode T2 and port A, be connected with resistance R 2.
Further, the resistance of described resistance R 1 equates with the resistance of resistance R 2.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention is connected on the power port of electric equipment, adopts two-stage thunder and lightning leakage path to release to thunder and lightning, improves the reliability that thunder and lightning is released, and avoids the invasion and attack of thunder and lightning to electric equipment, effectively electric equipment is protected.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is circuit diagram of the present invention.
Label in figure is: 1, port A; 2, port B.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.Embodiments of the present invention include but not limited to the following example.
[embodiment]
The high lightning protection circuit of reliability as shown in Figure 1, it comprises port A1, port B2, triode T1 and triode T2, the emitter of described triode T1 is connected on power supply, the collector electrode of described triode T1 is connected on the collector electrode of triode T2, the base stage of described triode T1 and the base stage of triode T2 are all connected on port A1, the grounded emitter of described triode T2, the emitter of described triode T1 is connected on the collector electrode of triode T3, the base stage of described triode T3 is connected on emitter and grounded emitter by resistance R 1, the collector electrode of described triode T1 is connected on port B2 by resistance R 2, on described port B2, be connected with second level thunder and lightning leadage circuit.When actual use, port A is connected on the power port of electric equipment, and port B is connected on the internal circuit of electric equipment.When thunder and lightning acts on port A, triode T1, triode T2 and triode T3 electrically release many paths are provided for thunder and lightning according to thunder and lightning, thunder and lightning is released, if thunder and lightning is not released completely, at port B place, secondary thunder and lightning leadage circuit is released to thunder and lightning again, effectively guarantees releasing to thunder and lightning.Base stage and emitter that resistance R 3 is triode T3 provide pressure drop, and triode T3 is normally worked, and for thunder and lightning, release reliable channel is provided.Resistance R 4 is current-limiting resistance, and it should be large as much as possible, avoids that electric current is excessive to be damaged electric equipment internal circuit.
Described second level thunder and lightning leadage circuit comprises diode D1 and diode D2, and the anode of described diode D1 is connected with the anode of diode D2 with port B2 simultaneously, and the negative electrode of described diode D1 is connected on power supply, the minus earth of described diode D2.Secondary thunder and lightning leadage circuit adopts diode D1 and diode D2, and it is simple in structure, to thunder and lightning release and reliability high.
In order further triode T1 and triode T2 to be protected, between described triode T1 and port A1, be connected with resistance R 1, between described triode T2 and port A1, be connected with resistance R 2.2 metering functions of resistance R 1 and resistance R, the voltage on port A acts on triode T1 and triode T2, utilizes resistance R 1 and resistance R 2, can protect triode T1 and triode T2.
The resistance of described resistance R 1 equates with the resistance of resistance R 2.Triode T1 becomes symmetrical up and down with triode T2, and the resistance of resistance R 1 equates with the resistance of resistance R 2, can improve the performance of whole circuit.
Be as mentioned above embodiments of the invention.The present invention is not limited to above-mentioned execution mode, and anyone should learn the structural change of making under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, within all falling into protection scope of the present invention.
Claims (4)
1. the lightning protection circuit that reliability is high, it is characterized in that: it comprises port A (1), port B (2), triode T1 and triode T2, the emitter of described triode T1 is connected on power supply, the collector electrode of described triode T1 is connected on the collector electrode of triode T2, the base stage of described triode T1 and the base stage of triode T2 are all connected on port A (1), the grounded emitter of described triode T2, the emitter of described triode T1 is connected on the collector electrode of triode T3, the base stage of described triode T3 is connected on emitter and grounded emitter by resistance R 1, the collector electrode of described triode T1 is connected on port B (2) by resistance R 2, on described port B (2), be connected with second level thunder and lightning leadage circuit.
2. the lightning protection circuit that reliability according to claim 1 is high, it is characterized in that: described second level thunder and lightning leadage circuit comprises diode D1 and diode D2, the anode of described diode D1 is connected with the anode of diode D2 with port B (2) simultaneously, the negative electrode of described diode D1 is connected on power supply, the minus earth of described diode D2.
3. the lightning protection circuit that reliability according to claim 1 and 2 is high, is characterized in that: between described triode T1 and port A (1), be connected with resistance R 1, between described triode T2 and port A (1), be connected with resistance R 2.
4. the lightning protection circuit that reliability according to claim 3 is high, is characterized in that: the resistance of described resistance R 1 equates with the resistance of resistance R 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310612421.5A CN103683254A (en) | 2013-11-28 | 2013-11-28 | Lightning protection circuit with high reliability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310612421.5A CN103683254A (en) | 2013-11-28 | 2013-11-28 | Lightning protection circuit with high reliability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103683254A true CN103683254A (en) | 2014-03-26 |
Family
ID=50319929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310612421.5A Pending CN103683254A (en) | 2013-11-28 | 2013-11-28 | Lightning protection circuit with high reliability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103683254A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2413422Y (en) * | 1999-12-21 | 2001-01-03 | 李树林 | Lightning arrester for telephone set and facsimile printer |
| US6351362B1 (en) * | 1998-04-13 | 2002-02-26 | Seiko Instruments Inc. | Protection circuit for an LCD controller IC |
| CN101621198A (en) * | 2009-06-29 | 2010-01-06 | 无锡市晶源微电子有限公司 | Effective electrostatic discharge protection circuit |
| CN101752849A (en) * | 2008-12-11 | 2010-06-23 | 上海华虹Nec电子有限公司 | Anti-static protection circuit |
| CN103346545A (en) * | 2013-06-28 | 2013-10-09 | 成都汉康信息产业有限公司 | Telemetering terminal electrostatic protection circuit |
-
2013
- 2013-11-28 CN CN201310612421.5A patent/CN103683254A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6351362B1 (en) * | 1998-04-13 | 2002-02-26 | Seiko Instruments Inc. | Protection circuit for an LCD controller IC |
| CN2413422Y (en) * | 1999-12-21 | 2001-01-03 | 李树林 | Lightning arrester for telephone set and facsimile printer |
| CN101752849A (en) * | 2008-12-11 | 2010-06-23 | 上海华虹Nec电子有限公司 | Anti-static protection circuit |
| CN101621198A (en) * | 2009-06-29 | 2010-01-06 | 无锡市晶源微电子有限公司 | Effective electrostatic discharge protection circuit |
| CN103346545A (en) * | 2013-06-28 | 2013-10-09 | 成都汉康信息产业有限公司 | Telemetering terminal electrostatic protection circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104503559A (en) | Latch-up effect resisting microprocessor reset circuit | |
| CN103248034B (en) | Can the USB flash disk of lightning protection | |
| CN102780204A (en) | Under-voltage protection circuit and lamp | |
| CN206595713U (en) | A kind of surge protection circuit | |
| CN103346546A (en) | Lightning protection circuit used for remote measurement terminal | |
| CN103280865A (en) | Charging port with over-voltage protection | |
| CN103683254A (en) | Lightning protection circuit with high reliability | |
| CN101566871B (en) | USB protection device | |
| CN105116200B (en) | A kind of detection circuit of compatible switch amount and level amount | |
| CN103346545A (en) | Telemetering terminal electrostatic protection circuit | |
| CN203278357U (en) | Charging port circuit with overvoltage protection function | |
| CN203690913U (en) | Anti-reverse connection device with short-circuit protection function | |
| CN103683238A (en) | Electrostatic protection circuit of camera port | |
| CN204256043U (en) | There is the electric quantity detecting circuit of overcurrent protection | |
| CN102521208A (en) | Novel microprocessor circuit | |
| CN103248036A (en) | Turn-on anti-surge protector for radio interface | |
| CN205489496U (en) | Cost audit information management device | |
| CN204966871U (en) | Safe socket with earthleakage protective equipment | |
| CN202712815U (en) | Electronic circuit over-voltage protector | |
| CN204347172U (en) | A kind of electric-leakage detection circuit | |
| CN103686016A (en) | Television with three-level lightning protection function | |
| CN203206325U (en) | Mobile phone having lightning protection function | |
| CN202094611U (en) | Overvoltage protection circuit of switching power supply | |
| CN209105481U (en) | A kind of LED power protection circuit based on MOSFET | |
| CN203205854U (en) | Electrostatic protection circuit for USB flash disk interface |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140326 |