CN206196089U - High LED drive circuit of security - Google Patents
High LED drive circuit of security Download PDFInfo
- Publication number
- CN206196089U CN206196089U CN201621266740.0U CN201621266740U CN206196089U CN 206196089 U CN206196089 U CN 206196089U CN 201621266740 U CN201621266740 U CN 201621266740U CN 206196089 U CN206196089 U CN 206196089U
- Authority
- CN
- China
- Prior art keywords
- triode
- resistance
- electric capacity
- drive circuit
- relay
- 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.)
- Expired - Fee Related
Links
Classifications
-
- 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]
Abstract
The utility model discloses a high LED drive circuit of security, including resistance R1, potentiometre RP1, inductance L, triode Q1, emitting diode LED and relay J, inductance L1 one end connect respectively VCC, resistance R2, potentiometre RP1 gleitbretter, resistance R1 and triode Q6 collecting electrode, triode Q6 base connecting resistance R6, triode Q6 projecting pole connect relay J coil, and the resistance R6 other end is the connecting resistance R1 other end, electric capacity C1, triode Q1 collecting electrode and resistance R4 respectively, and potentiometre RP1 one end and triode Q2 base are connected respectively to the electric capacity C1 other end. The utility model discloses high LED drive circuit of security adopts inductance L to store the electric energy of circuit, when guaranteeing that mains voltage reduces, plays compensation, adds overvoltage protection in addition, when mains voltage surpasses a definite value, and automatic cutout power, protection LED safety.
Description
Technical field
The utility model is related to a kind of LED, specifically a kind of safe LED drive circuit.
Background technology
In recent years, semiconductor light source just steps into lighting field with the role of novel solid light source.By solid luminescence thing
Principle of science, luminous efficiency can close to 100%, with operating voltage it is low, power consumption is small, the response time is short, luminous efficiency is high, anti-
Impact, long service life, light colour purity, stable and reliable for performance and low cost and other advantages.With the continuous reduction of LED prices, light
The continuous improvement of brightness, semiconductor light source presents the prospect of being widely applied in lighting field, the C-V characteristic of LED with it is common
The C-V characteristic of diode is identical, and the relatively minor swing of forward voltage may result in the drastically change of forward current.Many LED send
Light carry certain flashing state, be all that, because its drive reliability is low, the utility model provides a kind of safe and reliable
Small-sized White LED Driver.
Utility model content
The purpose of this utility model is to provide a kind of safe LED drive circuit, to solve above-mentioned background technology
The problem of middle proposition.
To achieve the above object, the utility model provides following technical scheme：
A kind of safe LED drive circuit, including resistance R1, potentiometer RP1, inductance L, triode Q1, luminous two
Pole pipe LED and relay J, described inductance L1 one end connect respectively power supply VCC, resistance R2, potentiometer RP1 slide plates, resistance R1 and
Triode Q6 colelctor electrodes, triode Q6 base stages connection resistance R6, triode Q6 emitter stages connection relay J coils, resistance R6 is another
One end connects the resistance R1 other ends, electric capacity C1, triode Q1 colelctor electrodes and resistance R4 respectively, and the electric capacity C1 other ends connect electricity respectively
Position device RP1 one end and triode Q2 base stages, triode Q2 colelctor electrodes connect electric capacity C2, the resistance R2 other ends and resistance R3 respectively,
The electric capacity C2 other ends connect the potentiometer RP1 other ends and triode Q1 base stages, resistance R3 other end connecting triode Q3 bases respectively
Pole, triode Q3 colelctor electrodes connection inductance L1 taps, inductance L1 other end connecting triode Q5 emitter stages, triode Q5 base stages connect
Connecting resistance R5, resistance R5 other end connecting triode Q4 colelctor electrodes, the triode Q4 base stages connection resistance R4 other ends, triode Q5
Colelctor electrode is connecting electric capacity C3 and relay J contact J-1, relay J contacts J-1 other end connecting luminous diodes LED just respectively
Pole, LED negative pole connects the electric capacity C3 other ends, triode Q4 emitter stages, electric capacity C4, triode Q2 transmittings respectively
Pole, triode Q1 emitter stages and the relay J coil other ends, electric capacity C4 other end connecting triode Q3 emitter stages.
As further program of the utility model：The relay J contacts J-1 is normally-closed contact.
As further program of the utility model：The power supply VCC voltages are 24V.
As further program of the utility model：The triode Q5 is PNP triode.
As the utility model further scheme：The triode Q1, triode Q2, triode Q3, triode Q4
NPN triode is with triode Q6.
Compared with prior art, the beneficial effects of the utility model are：The safe LED drive circuit of the utility model
The electric energy of circuit is stored using inductance L, when supply voltage reduction is ensured, plays compensating action, it is possible to additionally incorporate overvoltage
Protection, when supply voltage exceedes certain value, automatically cuts off power supply, protects LED safety.
Brief description of the drawings
Fig. 1 is the circuit diagram of safe LED drive circuit.
Specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment for being obtained, belongs to the scope of the utility model protection.
Fig. 1 is referred to, the utility model can effectively be risen using a simple transistor stepup transformer based on tap inductor L1
High voltage, until reaching voltage level needed for a typical white LED, Q1 and Q2 forms an astable multivibrator, collects
Electrode produces the square wave that phase differs 180 °.
Assuming that when power supply VCC is connected, Q2 shut-offs, Q1 conductings, under these conditions, the current collection of Q2 is extremely high, and Q3 passes through
The collector resistance of Q2 and turn on, when Q3 is turned on, electric current is by the first half of inductance L1.
At the end of the first half cycle of work, multivibrator is turned to another state：Q2 is turned on, Q1 shut-offs, Q1 current collections
It is extremely high.Q3 is turned off, and Q4 and Q5 is turned on by the collector resistance R1 of Q1, and the inductive current in decay flows through inductance L, causes
Current amplitude reduction, but increased by the voltage of LED, in the stage, electric current flows through LED, while electric capacity C3 is electrically charged, this
The duration in stage is determined by the RC values of astable circuit.
Once having exceeded RC time constants, this process is repeated：Q1 is turned on, Q2 shut-offs, and other transistors are as previously mentioned
Change, increased again by the electric current of the first half of inductance L1, by power storage in inductance, in this stage, electricity
Hold C3 to be powered to LED.
Other resistance R1 and resistance R4 also constitutes voltage sampling circuit, when power supply VCC overtensions, sampled voltage warp
Cross resistance R6 and be added to triode Q6 base stages, Q6 conductings, relay J actions cut off the supply current of LED, so as to protect the peace of LED
Entirely.
In sum, the safe LED drive circuit of the utility model is stored up using inductance L to the electric energy of circuit
Deposit, when supply voltage reduction is ensured, play compensating action, it is possible to additionally incorporate overvoltage protection, when supply voltage exceedes certain value,
Power supply is automatically cut off, LED safety is protected.
Claims (5)
1. a kind of safe LED drive circuit, including resistance R1, potentiometer RP1, inductance L, triode Q1, light-emitting diodes
Pipe LED and relay J, it is characterised in that described inductance L1 one end connect respectively power supply VCC, resistance R2, potentiometer RP1 slide plates,
Resistance R1 and triode Q6 colelctor electrodes, triode Q6 base stages connection resistance R6, triode Q6 emitter stages connection relay J coils,
The resistance R6 other ends connect the resistance R1 other ends, electric capacity C1, triode Q1 colelctor electrodes and resistance R4, the electric capacity C1 other ends point respectively
Not Lian Jie potentiometer RP1 one end and triode Q2 base stages, triode Q2 colelctor electrodes connect respectively electric capacity C2, the resistance R2 other ends and
Resistance R3, electric capacity the C2 other end connect the potentiometer RP1 other ends and triode Q1 base stages respectively, and the resistance R3 other ends connect three poles
Pipe Q3 base stages, the connection inductance L1 taps of triode Q3 colelctor electrodes, inductance L1 other end connecting triode Q5 emitter stages, triode Q5
Base stage connects resistance R5, resistance R5 other end connecting triode Q4 colelctor electrodes, the triode Q4 base stages connection resistance R4 other ends, three
Pole pipe Q5 colelctor electrodes connect electric capacity C3 and relay J contact J-1, relay J contacts J-1 other end connecting luminous diodes respectively
LED positive poles, LED negative pole connects the electric capacity C3 other ends, triode Q4 emitter stages, electric capacity C4, triode Q2 respectively
Emitter stage, triode Q1 emitter stages and the relay J coil other ends, electric capacity C4 other end connecting triode Q3 emitter stages.
2. safe LED drive circuit according to claim 1, it is characterised in that the relay J contacts J-1
It is normally-closed contact.
3. safe LED drive circuit according to claim 1, it is characterised in that the power supply VCC voltages are
24V。
4. safe LED drive circuit according to claim 1, it is characterised in that the triode Q5 is PNP tri-
Pole pipe.
5. safe LED drive circuit according to claim 1, it is characterised in that the triode Q1, triode
Q2, triode Q3, triode Q4 and triode Q6 are NPN triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621266740.0U CN206196089U (en) | 2016-11-24 | 2016-11-24 | High LED drive circuit of security |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621266740.0U CN206196089U (en) | 2016-11-24 | 2016-11-24 | High LED drive circuit of security |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206196089U true CN206196089U (en) | 2017-05-24 |
Family
ID=58724950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621266740.0U Expired - Fee Related CN206196089U (en) | 2016-11-24 | 2016-11-24 | High LED drive circuit of security |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206196089U (en) |
-
2016
- 2016-11-24 CN CN201621266740.0U patent/CN206196089U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170524 Termination date: 20171124 |