CN205491344U - Tandem drive type low pressure LED circuit - Google Patents
Tandem drive type low pressure LED circuit Download PDFInfo
- Publication number
- CN205491344U CN205491344U CN201620242034.6U CN201620242034U CN205491344U CN 205491344 U CN205491344 U CN 205491344U CN 201620242034 U CN201620242034 U CN 201620242034U CN 205491344 U CN205491344 U CN 205491344U
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- China
- Prior art keywords
- resistance
- audion
- triode
- diode
- pole
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- 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.)
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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]
Abstract
The utility model discloses a tandem drive type low pressure LED circuit, including triode Q1, triode Q2, resistance R2, electric capacity C1, diode D1 and inductance L1, electric capacity C2 is connected respectively to resistance R2 one end, triode Q4 collecting electrode, triode Q2 projecting pole, inductance L1, MOS pipe VS's the D utmost point and power VCC, triode Q3 base is connected respectively to the resistance R2 other end, resistance R3 and resistance R5, diode D2 negative pole is connected to the resistance R5 other end, the anodal triode Q4 base of connecting of diode D2, relay J coil is connected to triode Q4 projecting pole, LED lamp cluster is connected respectively to the relay J coil other end, triode Q2 projecting pole and triode Q1 projecting pole and ground connection. The utility model discloses tandem drive type low pressure LED circuit adopts inductance L1 to carry out the energy storage, effectively improves the drive efficiency of series connection LED lamp cluster, has still added the overvoltage protection function in addition, has promoted the security of circuit.
Description
Technical field
This utility model relates to a kind of LED, specifically a kind of tandem drive type low-voltage LED circuit.
Background technology
For driving more than one high-brightness white-light LED, design engineer needs selection to be to be connected in series LED or also
Connection connects LED.Certainly, every kind of connected mode all can be brought compromise to design.It is connected in parallel and only need to apply relatively at each LED two ends
Low voltage, but need to utilize steady resistance or current source consistent to the brightness ensureing each LED.If flowing through each LED's
Bias current varies in size, then their brightness is the most different, thus causes whole light-source brightness uneven.But, utilize ballast
Resistance or current source ensure that the brightness of LED unanimously will shorten the service life of battery.
Use and be connected in series the concordance that substantially can ensure electric current very well, but need to apply high voltage to LED strip,
Need the driving power supply of bigger voltage, and general drive circuit can cause power consumption to improve.
Utility model content
The purpose of this utility model is to provide a kind of tandem drive type low-voltage LED circuit, to solve above-mentioned background technology
The problem of middle proposition.
For achieving the above object, the following technical scheme of this utility model offer:
A kind of tandem drive type low-voltage LED circuit, including audion Q1, audion Q2, resistance R2, electric capacity C1, diode
D1 and inductance L1, described resistance R2 one end connect respectively electric capacity C2, audion Q4 colelctor electrode, audion Q2 emitter stage, inductance L1,
The D pole of metal-oxide-semiconductor VS and power supply VCC, the resistance R2 other end connecting triode Q3 base stage, resistance R3 and resistance R5, resistance R5 respectively
The other end connects diode D2 negative pole, diode D2 positive pole connecting triode Q4 base stage, and audion Q4 emitter stage connects relay J
Coil, the relay J coil other end connects LED string, audion Q2 emitter stage and audion Q1 emitter stage ground connection, institute respectively
Stating audion Q3 colelctor electrode and connect the resistance R3 other end, the G pole of metal-oxide-semiconductor VS and resistance R4 respectively, the resistance R4 other end connects respectively
Connect the electric capacity C2 other end and diode D1 negative pole, diode D1 positive pole connect respectively the inductance L1 other end, resistance R1, electric capacity C1,
Audion Q2 colelctor electrode and relay J contact J-1, the relay J contact J-1 other end connects the LED string other end, audion Q2
Base stage connects S pole and the audion Q1 colelctor electrode of metal-oxide-semiconductor VS respectively, and audion Q1 base stage connects the resistance R1 other end and electricity respectively
Hold the C1 other end.
As further program of the utility model: described relay J contact J-1 is normally-closed contact.
As this utility model further scheme: described power supply VCC voltage is 6V.
Compared with prior art, the beneficial effects of the utility model are: this utility model tandem drive type low-voltage LED circuit
Using inductance L1 to carry out energy storage, be effectively improved the drive efficiency of series LED lamp string, the requirement to supply voltage reduces, additionally also
Add over-voltage protecting function, improve the safety of circuit.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of tandem drive type low-voltage LED circuit.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under making creative work premise
The every other embodiment obtained, broadly falls into the scope of this utility model protection.
Refer to Fig. 1, in this utility model embodiment, a kind of tandem drive type low-voltage LED circuit, including audion Q1,
Audion Q2, resistance R2, electric capacity C1, diode D1 and inductance L1, described resistance R2 one end connects electric capacity C2, audion Q4 respectively
Colelctor electrode, audion Q2 emitter stage, inductance L1, the D pole of metal-oxide-semiconductor VS and power supply VCC, resistance R2 other end connecting triode respectively
Q3 base stage, resistance R3 and resistance R5, the resistance R5 other end connects diode D2 negative pole, diode D2 positive pole connecting triode Q4 base
Pole, audion Q4 emitter stage connects relay J coil, and the relay J coil other end connects LED string respectively, audion Q2 sends out
Emitter-base bandgap grading and audion Q1 emitter stage ground connection, described audion Q3 colelctor electrode connects the resistance R3 other end, the G of metal-oxide-semiconductor VS respectively
Pole and resistance R4, the resistance R4 other end connects the electric capacity C2 other end and diode D1 negative pole respectively, and diode D1 positive pole connects respectively
Meeting the inductance L1 other end, resistance R1, electric capacity C1, audion Q2 colelctor electrode and relay J contact J-1, J-1 is another in relay J contact
One end connects the LED string other end, and audion Q2 base stage connects S pole and audion Q1 colelctor electrode, the audion of metal-oxide-semiconductor VS respectively
Q1 base stage connects the resistance R1 other end and the electric capacity C1 other end respectively；Described relay J contact J-1 is normally-closed contact；Described electricity
Source VCC voltage is 6V.
Operation principle of the present utility model is: refer to Fig. 1, the booster circuit being made up of Q1 and Q2, and by Q3 and VS
The control circuit of composition, it is assumed that Q1 ends, and when the conducting voltage of the slightly higher Q2 of supply voltage, Q2 base stage will flow through positive current, this
Time, Q2 turns on, inductance L1 ground connection, and along with the electric current on L1 increases with the speed of di/dt, energy preserves in L1 magnetic field
Coming, along with electric current is gradually increased, the collector voltage of Q2 is sufficiently high, and Q1 can be made to turn on, and the base voltage of Q1 is by by R1 and C1
The feedforward network of composition links the colelctor electrode of Q2, and R1 is also used to limit the base current of Q1, after Q1 conducting, drives the base stage of Q2
Ground connection, then Q2 cut-off, the energy of L1 is released in LED string along with field weakening, and the fly back action of L1 is at LED
It is applied with bigger forward bias voltage on lamp string, makes LED send white light.Due to the high frequency flicker of the imperceptible LED of human eye, institute
The illumination of brightness constancy can be provided with this circuit.After L1 electric discharge terminates, Q1 returns to cut-off state.When normally working, this
Self-oscillation action repeats, until supply voltage drops to less than VBE Yu the VS pressure drop sum of Q2, at this moment Q2 is no longer turned on.
Additionally resistance R2 and resistance R3 forms voltage sampling circuit, when the sampled voltage voltage stabilizing value more than Zener diode D2
Time, D2 punctures conducting, and trigger triode Q4 turns on, and relay J works, and cuts off the operating current of LED string, plays overvoltage protection
Effect.
It is obvious to a person skilled in the art that this utility model is not limited to the details of above-mentioned one exemplary embodiment, and
And in the case of without departing substantially from spirit or essential attributes of the present utility model, it is possible to realize this practicality in other specific forms new
Type.Therefore, no matter from the point of view of which point, all should regard embodiment as exemplary, and be nonrestrictive, this practicality is new
The scope of type is limited by claims rather than described above, it is intended that by the containing of equivalency in claim that fall
All changes in justice and scope are included in this utility model.Should not be considered as any reference in claim limiting
Involved claim.
Although moreover, it will be appreciated that this specification is been described by according to embodiment, but the most each embodiment only wraps
Containing an independent technical scheme, this narrating mode of description is only that for clarity sake those skilled in the art should
Description can also be formed those skilled in the art through appropriately combined as an entirety, the technical scheme in each embodiment
May be appreciated other embodiments.
Claims (3)
1. a tandem drive type low-voltage LED circuit, including audion Q1, audion Q2, resistance R2, electric capacity C1, diode D1
With inductance L1, it is characterised in that described resistance R2 one end connects electric capacity C2, audion Q4 colelctor electrode, audion Q2 transmitting respectively
Pole, inductance L1, the D pole of metal-oxide-semiconductor VS and power supply VCC, the resistance R2 other end connecting triode Q3 base stage, resistance R3 and resistance respectively
R5, the resistance R5 other end connects diode D2 negative pole, diode D2 positive pole connecting triode Q4 base stage, and audion Q4 emitter stage is even
Contact relay J coil, the relay J coil other end connects LED string, audion Q2 emitter stage and audion Q1 emitter stage respectively
And ground connection, described audion Q3 colelctor electrode connect respectively the resistance R3 other end, the G pole of metal-oxide-semiconductor VS and resistance R4, resistance R4 another
End connects the electric capacity C2 other end and diode D1 negative pole respectively, diode D1 positive pole connect respectively the inductance L1 other end, resistance R1,
Electric capacity C1, audion Q2 colelctor electrode and relay J contact J-1, the relay J contact J-1 other end connects the LED string other end,
Audion Q2 base stage connects S pole and the audion Q1 colelctor electrode of metal-oxide-semiconductor VS respectively, and it is another that audion Q1 base stage connects resistance R1 respectively
One end and the electric capacity C1 other end.
Tandem drive type low-voltage LED circuit the most according to claim 1, it is characterised in that described relay J contact J-1
For normally-closed contact.
Tandem drive type low-voltage LED circuit the most according to claim 1, it is characterised in that described power supply VCC voltage is
6V。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620242034.6U CN205491344U (en) | 2016-03-28 | 2016-03-28 | Tandem drive type low pressure LED circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620242034.6U CN205491344U (en) | 2016-03-28 | 2016-03-28 | Tandem drive type low pressure LED circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205491344U true CN205491344U (en) | 2016-08-17 |
Family
ID=56648030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620242034.6U Expired - Fee Related CN205491344U (en) | 2016-03-28 | 2016-03-28 | Tandem drive type low pressure LED circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205491344U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106455235A (en) * | 2016-11-24 | 2017-02-22 | 郑州艾莫弗信息技术有限公司 | High-safety LED driving circuit |
| CZ307763B6 (en) * | 2017-10-17 | 2019-04-17 | KIWA s.k., s.r.o. | Overvoltage protection for public LED lighting fixtures |
-
2016
- 2016-03-28 CN CN201620242034.6U patent/CN205491344U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106455235A (en) * | 2016-11-24 | 2017-02-22 | 郑州艾莫弗信息技术有限公司 | High-safety LED driving circuit |
| CZ307763B6 (en) * | 2017-10-17 | 2019-04-17 | KIWA s.k., s.r.o. | Overvoltage protection for public LED lighting fixtures |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20160817 Termination date: 20170328 |