CN206100553U - Take real -time protect function's emergent LED lighting circuit - Google Patents
Take real -time protect function's emergent LED lighting circuit Download PDFInfo
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- CN206100553U CN206100553U CN201621117469.4U CN201621117469U CN206100553U CN 206100553 U CN206100553 U CN 206100553U CN 201621117469 U CN201621117469 U CN 201621117469U CN 206100553 U CN206100553 U CN 206100553U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The utility model belongs to the technical field of and electron, in particular to take real -time protect function's emergent LED lighting circuit, including rectifier bridge, the AC who connects gradually DC drive circuit, stand -by power supply, LED light source, its characterized in that: the LED light source is through MOS switch tube and stand -by power supply, still include rectifying step -down circuit, the electric wire netting power off detected circuit that connects gradually, amplifier circuit, the drive end of MOS switch tube is connected to the amplifier circuit output. This circuit utilizes the wall switch of reverse power supply of stand -by power supply and current detection's tests LED lamp, when power system blackouts and wall switch closure, use stand -by power supply to supply power as the LED lamp, when mains supply and wall switch closure switch on, get into AC power supply and stand -by power supply charge mode, through AC DC drive circuit charges for stand -by power supply, have stand -by power supply's protection circuit, guarantee the job stabilization of stand -by power supply charge -discharge.
Description
Technical field
The invention belongs to and electronic technology field, more particularly to a kind of emergency LED lighting circuit with real time protection.
Background technology
With the decline of LED manufacturing costs, the LED with advantages such as efficient, low energy consumption, life-span lengths will be more and more extensive
Be applied to lighting field.In actual applications, the stability of circuit design causes more and more the attention of people, in
It is that the protection that LED drive circuit is exported just is particularly important, traditional real-time guard emergency LED lighting circuit needs multiple special
Control chip electric power thus supplied could be judged, and judge low precision, easily cause false triggering.
The content of the invention
It is an object of the invention to：Judge poor, baroque asking for the electric power thus supplied of traditional LED drive circuit
Topic, there is provided a kind of accurately to judge the band real time protection emergency LED photograph that electrical network is stopped power supply with switch on wall closure situation
Bright circuit.
The technical solution used in the present invention is as follows：
A kind of emergency LED lighting circuit with real time protection, including the rectifier bridge, AC-DC being sequentially connected electricity is driven
Road, stand-by power supply, LED light source, it is characterised in that：The LED light source is by MOS switch pipe and stand-by power supply；
Also include rectification reduction voltage circuit, the grid cut-off detection circuit being sequentially connected, amplifying circuit, amplification circuit output end
The drive end of connection MOS switch pipe.
In above-mentioned technical proposal, rectification reduction voltage circuit includes：Including the divider resistance and rectification unit that are connected, partial pressure electricity
Resistance gets access to grid, and rectification unit gets access to grid the drive end of power failure detection circuit, the rectification unit include diode D4 in parallel and
Resistance R7.On the one hand resistance R7 can reduce here the virtual resistance of diode D4, so as to reduce diode heating and power consumption,
On the other hand it is the innovative point of the application, grid cut-off is detected into circuit while having both and will ensure that when the grid cut-off when
Drive end access electrical network, with electrical network formed loop.
In above-mentioned technical proposal, the grid cut-off detects circuit, including the audion Q3 of positive-negative-positive, audion Q3 send out
Emitter-base bandgap grading connects stand-by power supply, and the colelctor electrode of audion Q3 is connected with and for the output current ic change of audion Q3 to be converted to change in voltage
Resistance R8.Here select PNP type triode it is also critically important, 1 be first audion be current mode device, Vbe is relatively steady
Fixed, it can be detected to the electric current of uA ranks, and if selecting mos pipes, because because it is if mos pipes
UA level currents cannot be realized detection by voltage-type device, i.e., cannot complete the function.The positive-negative-positive three when grid cut-off
Pole pipe base stage accesses electrical network through resistance R7 etc..
In above-mentioned technical proposal, rectification unit outfan is connected with stabilivolt D5.Because the base stage of the PNP of PNP triode
Voltage can only be less than 5V, otherwise can burn, therefore stabilivolt is here for clamp voltage.
In above-mentioned technical proposal, the amplifying circuit includes audion Q4, drive end base stage and the resistance R8 of audion Q4
Connection, colelctor electrode connects stand-by power supply by the resistance R1 and resistance R5 of series connection, and the connection end of resistance R1 and resistance R5 is drawn, even
The drive end grid of MOS switch pipe is connect, when audion Q4 conductings, the connection end voltage of resistance R1 and resistance R5 reduces MOS switch
Pipe is turned on.Why need exist for designing an amplifying circuit road, because the base current of audion Q3 is very small and weak, only uA
Rank, it is therefore desirable to MOS switch pipe could be driven after being amplified to it.
In above-mentioned technical proposal, audion Q3 is to connect stand-by power supply by diode D3 sending and receiving emitter-base bandgap gradings, and diode D3 is positive
Pole connects stand-by power supply, and negative electrode meets audion Q3.
In above-mentioned technical proposal, AC-DC drive circuits with stand-by power supply are connected by the metal-oxide-semiconductor Q1 and diode D1 that connects
Connect, metal-oxide-semiconductor Q1 source electrodes connect AC-DC drive circuit outfans, drain electrode connects diode D1 anodes, and diode D1 negative electrodes connect standby electricity
Source.
In above-mentioned technical proposal, on the grid of the metal-oxide-semiconductor Q1 protection circuit is connected with.When protection circuit output abnormality letter
Number when, metal-oxide-semiconductor Q1 cut-off, stop charge, ensure stand-by power supply normal work.
In above-mentioned technical proposal, thermal-shutdown circuit, over-and under-voltage protection circuit, current foldback circuit.
In above-mentioned technical proposal, the thermal-shutdown circuit structure is：The outfan connection amplifier in the first temperature control current source
The positive input terminal of U1, its outfan passes sequentially through resistance R11 and resistance R12 ground connection, the two ends of resistance R12 respectively with metal-oxide-semiconductor Q11
Source electrode and drain electrode connection；The outfan in the second temperature control current source connects the negative input end of amplifier U1, and its outfan connects three poles
It is grounded after the emitter stage of pipe Q12, the base stage of audion Q12 and colelctor electrode connection；The outfan output overheat protector letter of amplifier U1
Number；
The over-and under-voltage protection circuit structure is：Resistance R21 one end connects stand-by power supply positive pole, and the other end is passed sequentially through
Resistance R22, resistance R23, resistance R24 ground connection, resistance R21 and resistance R22 intermediate nodes connect negative input end, the resistance of amplifier U2
R22 and resistance R23 intermediate nodes connect the negative input end of amplifier U3；The positive input terminal input reference voltage of amplifier U2 and amplifier U3；
The outfan of amplifier U2 and amplifier U3 connects respectively two inputs of nor gate U5, and nor gate U5 inputs are connected by reverser U4
The grid of metal-oxide-semiconductor Q21 is connected to, metal-oxide-semiconductor Q21 source electrodes and drain electrode connect respectively resistance R24 two ends；The amplifier U2 outfan output
UVP signal, the amplifier U3 outfan output over-voltage protection signal；
The thermal-shutdown circuit structure is：Resistance R25 connections are connected on stand-by power supply positive pole and AC-DC drive circuits
In charging paths between outfan；Resistance R25 two ends connect respectively two inputs of amplifier U6, the outfan output of amplifier U6
Overcurrent protection signal.
Electrical network live wire is connected to the positive input terminal of both rectifier bridge and mu balanced circuit by switch on wall, when switch on wall is closed
During conjunction, alternating current by rectifier bridge and AC-DC conversion module, directly to LED light source lamp plate, now resistance R3, diode D4, electricity
Resistance R4, resistance R2, the path of diode D3 do not have electric current on stand-by power supply positive pole, now PNP triode Q3 cut-off, NPN
The base voltage of audion Q4 is 0, and audion Q4 is also at cut-off state, and PMOS Q2 grid voltage is provided not by stand-by power supply
Conducting, now, the power voltage supply that LED light source lamp plate is provided by AC-DC drive circuits, and while charge for stand-by power supply.
When switch on wall disconnects, AC-DC drive circuits cannot power, due to there is big electricity between zero line and zero line side
Resistance Rx, stand-by power supply constitutes ground connection by diode D3, resistance R2, resistance R7, resistance R3, big resistance, zero line, zero line side
, now there is voltage difference in conductive path, turn on audion Q3 on resistance R4, further turn on NPN triode Q4 so that
The grid voltage of PMOS Q2 is pulled low, and then turns on, and the path that stand-by power supply is carried out by metal-oxide-semiconductor Q2 and resistance R2 is to LED
Light source lamp plate is powered.
Further, voltage regulator circuit structure is：Its positive input terminal is connected to the positive pole of diode D4, two poles by resistance R3
The negative pole of pipe D4 is used as mu balanced circuit positive output end；Diode D4 is parallel with resistance R7, and its negative input end is connected with positive input terminal
There is resistance R10；Its negative input end ground connection；Opposite direction connection has Zener diode D5 between positive input terminal and negative input end.
Further, emergency circuit negative input end ground connection is detected, detection emergency circuit positive input terminal is connected by resistance R4
To the base stage of audion Q3, resistance R2 is connected between the base stage and emitter stage of audion Q3, stand-by power supply positive pole is by forward direction
Diode D3 be connected to the emitter stage of audion Q3, the colelctor electrode of audion Q3 is connected to the base of audion Q4 by resistance R8
Pole；Resistance R9, the grounded emitter of audion Q4 are connected between the emitter stage and base stage of audion Q4；The current collection of audion Q4
Pole is connected to metal-oxide-semiconductor Q2 grids by resistance R5, and the source electrode connection stand-by power supply positive pole of metal-oxide-semiconductor Q2, the drain electrode of metal-oxide-semiconductor Q2 passes through
Resistance R6 connects LED light source lamp plate stand-by power supply；Stand-by power supply positive pole is connected to the grid of resistance metal-oxide-semiconductor Q2 by resistance R1,
The charging end connection metal-oxide-semiconductor Q1 source electrodes being connected with AC-DC drive circuit outfans in detection emergency circuit, the drain electrode of metal-oxide-semiconductor Q1
The drain electrode of metal-oxide-semiconductor Q2, the negative pole of stand-by power supply cathode connecting diode D1 are connected to by positive connection diode D1.
In sum, as a result of above-mentioned technical proposal, the invention has the beneficial effects as follows：
1. whether the switch on wall that this circuit inversely powers with the method for current detecting to judge LED using stand-by power supply
Closure；When grid power blackout and switch on wall closure, powered for LED using stand-by power supply；When electrical network is powered and switch on wall
During closure conducting, power and stand-by power supply charge mode into AC, be charged for stand-by power supply by AC-DC drive circuits.
2. this circuit has the protection circuit of stand-by power supply, it is ensured that the working stability of stand-by power supply discharge and recharge.
3. this electric circuit inspection emergency circuit and protection circuit carry out integrated chip design, and peripheral cell demand is few, realize
It is powerful, simple structure.
Description of the drawings
Fig. 1 is circuit theory diagrams of the present invention；
Fig. 2 is thermal-shutdown circuit schematic diagram of the present invention；
Fig. 3 is under-voltage overvoltage crowbar figure of the invention；
Fig. 4 is current foldback circuit schematic diagram of the present invention.
Specific embodiment
All features disclosed in this specification, in addition to mutually exclusive feature and/or step, can be with any
Mode is combined.
The present invention is elaborated below in conjunction with the accompanying drawings.
A kind of emergency LED lighting circuit with real time protection, including the rectifier bridge, AC-DC being sequentially connected electricity is driven
Road, stand-by power supply, LED light source, it is characterised in that：The LED light source is by MOS switch pipe and stand-by power supply；
Also include rectification reduction voltage circuit, the grid cut-off detection circuit being sequentially connected, amplifying circuit, amplification circuit output end
The drive end of connection MOS switch pipe.
Voltage regulator circuit structure is：Its positive input terminal is connected to the positive pole of diode D4 by resistance R3, and diode D4's is negative
Pole is used as mu balanced circuit positive output end；Diode D4 is parallel with resistance R7, and its negative input end is connected with resistance with positive input terminal
R10；Its negative input end ground connection；Opposite direction connection has Zener diode D5 between positive input terminal and negative input end.
Positive input terminal is connected to the base stage of audion Q3, the base stage of audion Q3 and transmitting by resistance R4 in integrated circuit
Resistance R2 is connected between pole, stand-by power supply positive pole is connected to the emitter stage of audion Q3, three poles by positive diode D3
The colelctor electrode of pipe Q3 is connected to the base stage of audion Q4 by resistance R8；Electricity is connected between the emitter stage and base stage of audion Q4
Resistance R9, the grounded emitter of audion Q4；The colelctor electrode of audion Q4 is connected to metal-oxide-semiconductor Q2 grids, metal-oxide-semiconductor Q2 by resistance R5
Source electrode connection stand-by power supply positive pole, the drain electrode of metal-oxide-semiconductor Q2 connects LED light source lamp plate stand-by power supply by resistance R6；Standby electricity
Source positive pole is connected to the grid of resistance metal-oxide-semiconductor Q2 by resistance R1, connects with AC-DC drive circuits outfan in detection emergency circuit
The charging end connection metal-oxide-semiconductor Q1 source electrodes for connecing, the drain electrode of metal-oxide-semiconductor Q1 is connected to the leakage of metal-oxide-semiconductor Q2 by positive connection diode D1
Pole, the negative pole of stand-by power supply cathode connecting diode D1.Stand-by power supply adopts rechargeable battery.
Protection circuit is connected with the grid of metal-oxide-semiconductor Q1.
Protection circuit includes：Thermal-shutdown circuit, over-and under-voltage protection circuit, current foldback circuit.
Thermal-shutdown circuit structure is：The outfan in the first temperature control current source connects the positive input terminal of amplifier U1, its output
End passes sequentially through resistance R11 and resistance R12 ground connection, and the two ends of resistance R12 are connected respectively with the source electrode of metal-oxide-semiconductor Q11 and draining；The
The outfan in two temperature control current sources connects the negative input end of amplifier U1, the emitter stage of its outfan connecting triode Q12, audion
It is grounded after the base stage of Q12 and colelctor electrode connection；The outfan output overheat protector signal of amplifier U1.
Over-and under-voltage protection circuit structure is：Resistance R21 one end connects stand-by power supply positive pole, and the other end passes sequentially through resistance
R22, resistance R23, resistance R24 ground connection, resistance R21 and the resistance R22 intermediate nodes connection negative input end of amplifier U2, resistance R22 and
Resistance R23 intermediate nodes connect the negative input end of amplifier U3；The positive input terminal input reference voltage of amplifier U2 and amplifier U3；Amplifier U2
Connect two inputs of nor gate U5 respectively with the outfan of amplifier U3, nor gate U5 inputs are connected to by reverser U4
The grid of metal-oxide-semiconductor Q21, metal-oxide-semiconductor Q21 source electrodes and drain electrode connect respectively resistance R24 two ends；The amplifier U2 outfan output is under-voltage
Protection signal, the amplifier U3 outfan output over-voltage protection signal.
Thermal-shutdown circuit structure is：Resistance R25 connections are connected on the output of stand-by power supply positive pole and AC-DC drive circuits
In charging paths between end；Resistance R25 two ends connect respectively two inputs of amplifier U6, the outfan output overcurrent of amplifier U6
Protection signal.
Detection emergency circuit and protection circuit carry out Integration Design.
Claims (10)
1. a kind of emergency LED lighting circuit with real time protection, including the rectifier bridge, AC-DC drive circuits being sequentially connected,
Stand-by power supply, LED light source, it is characterised in that：The LED light source is connected with stand-by power supply by MOS switch pipe；
Also include rectification reduction voltage circuit, the grid cut-off detection circuit being sequentially connected, amplifying circuit, amplification circuit output end connection
The drive end of MOS switch pipe, rectification reduction voltage circuit gets access to grid.
2. a kind of emergency LED lighting circuit with real time protection according to claim 1, it is characterised in that：Rectification
Reduction voltage circuit includes：Including the divider resistance and rectification unit that are connected, divider resistance gets access to grid, and rectification unit gets access to grid power-off
The drive end of detection circuit, the rectification unit includes diode D4 and resistance R7 in parallel.
3. a kind of emergency LED lighting circuit with real time protection according to claim 1, it is characterised in that：Rectification
Unit outfan is connected with stabilivolt D5.
4. a kind of emergency LED lighting circuit with real time protection according to claim 1, it is characterised in that：It is described
Grid cut-off detects circuit, including the emitter stage of the audion Q3 of positive-negative-positive, audion Q3 connects stand-by power supply, the collection of audion Q3
Electrode is connected with the resistance R8 that the output current ic change of audion Q3 is converted to change in voltage.
5. a kind of emergency LED lighting circuit with real time protection according to claim 1, it is characterised in that：It is described
Amplifying circuit includes audion Q4, and the base stage of audion Q4 is connected with resistance R8, resistance R1 and resistance that colelctor electrode passes through series connection
R5 connects stand-by power supply, and the grid of connection MOS switch pipe is drawn in the connection end of resistance R1 and resistance R5, when audion Q4 is turned on,
The connection end voltage of resistance R1 and resistance R5 is reduced, the conducting of MOS switch pipe.
6. a kind of emergency LED lighting circuit with real time protection according to claim 4, it is characterised in that：Three poles
Pipe Q3 is to connect stand-by power supply by diode D3 sending and receiving emitter-base bandgap gradings, and diode D3 anodes connect stand-by power supply, and negative electrode meets audion Q3.
7. a kind of emergency LED lighting circuit with real time protection according to claim 1, it is characterised in that AC-DC
Drive circuit with stand-by power supply is connected by the metal-oxide-semiconductor Q1 and diode D1 that connects, and metal-oxide-semiconductor Q1 source electrodes connect AC-DC drive circuits
Outfan, drain electrode connects diode D1 anodes, and diode D1 negative electrodes connect stand-by power supply.
8. a kind of emergency LED lighting circuit with real time protection according to claim 7, it is characterised in that described
Protection circuit is connected with the grid of metal-oxide-semiconductor Q1.
9. a kind of emergency LED lighting circuit with real time protection according to claim 4, it is characterised in that described
Protection circuit includes：Thermal-shutdown circuit, over-and under-voltage protection circuit, current foldback circuit.
10. a kind of emergency LED lighting circuit with real time protection according to claim 9, it is characterised in that described
Thermal-shutdown circuit structure is：The outfan in the first temperature control current source connects the positive input terminal of amplifier U1, and its outfan leads to successively
Cross resistance R11 and resistance R12 ground connection, the two ends of resistance R12 are connected respectively with the source electrode of metal-oxide-semiconductor Q11 and draining；Second temperature control electricity
The outfan in stream source connects the negative input end of amplifier U1, the emitter stage of its outfan connecting triode Q12, the base of audion Q12
It is grounded after pole and colelctor electrode connection；The outfan output overheat protector signal of amplifier U1；
The over-and under-voltage protection circuit structure is：Resistance R21 one end connects stand-by power supply positive pole, and the other end passes sequentially through resistance
R22, resistance R23, resistance R24 ground connection, resistance R21 and the resistance R22 intermediate nodes connection negative input end of amplifier U2, resistance R22 and
Resistance R23 intermediate nodes connect the negative input end of amplifier U3；The positive input terminal input reference voltage of amplifier U2 and amplifier U3；Amplifier U2
Connect two inputs of nor gate U5 respectively with the outfan of amplifier U3, nor gate U5 inputs are connected to by reverser U4
The grid of metal-oxide-semiconductor Q21, metal-oxide-semiconductor Q21 source electrodes and drain electrode connect respectively resistance R24 two ends；The amplifier U2 outfan output is under-voltage
Protection signal, the amplifier U3 outfan output over-voltage protection signal；
The thermal-shutdown circuit structure is：Resistance R25 connections are connected on the output of stand-by power supply positive pole and AC-DC drive circuits
In charging paths between end；Resistance R25 two ends connect respectively two inputs of amplifier U6, the outfan output overcurrent of amplifier U6
Protection signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621117469.4U CN206100553U (en) | 2016-10-12 | 2016-10-12 | Take real -time protect function's emergent LED lighting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621117469.4U CN206100553U (en) | 2016-10-12 | 2016-10-12 | Take real -time protect function's emergent LED lighting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206100553U true CN206100553U (en) | 2017-04-12 |
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ID=58482592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621117469.4U Expired - Fee Related CN206100553U (en) | 2016-10-12 | 2016-10-12 | Take real -time protect function's emergent LED lighting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206100553U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106255278A (en) * | 2016-10-12 | 2016-12-21 | 成都卓创科微电子有限公司 | A kind of emergency LED lighting circuit of band real time protection |
| CN112965009A (en) * | 2021-02-07 | 2021-06-15 | 上海裕芯电子科技有限公司 | Emergency lighting system, alternating current power grid power failure detection circuit and detection method |
-
2016
- 2016-10-12 CN CN201621117469.4U patent/CN206100553U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106255278A (en) * | 2016-10-12 | 2016-12-21 | 成都卓创科微电子有限公司 | A kind of emergency LED lighting circuit of band real time protection |
| CN106255278B (en) * | 2016-10-12 | 2018-03-23 | 成都卓创科微电子有限公司 | A kind of emergency LED lighting circuit with real time protection |
| CN112965009A (en) * | 2021-02-07 | 2021-06-15 | 上海裕芯电子科技有限公司 | Emergency lighting system, alternating current power grid power failure detection circuit and detection method |
| CN112965009B (en) * | 2021-02-07 | 2024-05-07 | 上海裕芯电子科技有限公司 | Emergency lighting system, alternating current power grid outage detection circuit and detection method |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170412 Termination date: 20191012 |
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| CF01 | Termination of patent right due to non-payment of annual fee |