CN202773124U - LED street lamp drive circuit - Google Patents
LED street lamp drive circuit Download PDFInfo
- Publication number
- CN202773124U CN202773124U CN2012203093201U CN201220309320U CN202773124U CN 202773124 U CN202773124 U CN 202773124U CN 2012203093201 U CN2012203093201 U CN 2012203093201U CN 201220309320 U CN201220309320 U CN 201220309320U CN 202773124 U CN202773124 U CN 202773124U
- Authority
- CN
- China
- Prior art keywords
- circuit
- street lamp
- constant current
- led street
- lamp drive
- 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
Images
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
- Y02B20/72—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps in street lighting
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Led Devices (AREA)
Abstract
The utility model discloses an LED street lamp drive circuit. A reverse connection preventing circuit is disposed on a signal input end. An output end of the reverse connection preventing circuit is connected with an anti-interference circuit, and an output end of the anti-interference circuit is connected with a constant current circuit. An output end of the constant current circuit is connected with an LED light source circuit. Through the reverse connection preventing circuit, the LED street lamp drive circuit prevents components and a light source from being burnt down caused by reverse connection by human in a process of installation and maintenance. The anti-interference circuit filters noise waves in the circuit and provides reliable work environment for a constant current module. Through the constant current module and a small number of peripheral devices, accurate constant current effect and high-efficiency transformation rate are achieved, thereby ensuring brightness of each LED, and consistency and uniformity of chroma.
Description
Technical field
The utility model relates to a kind of drive circuit, is a kind of LED street lamp drive circuit specifically.
Background technology
LED illumination is acknowledged as the illuminating product of tool development prospect of 21 century, the energy-saving and environmental protection two large themes that meet the world today, particularly aspect energy-conservation, the LED illuminating product has very significantly advantage, its power consumption is 1/4 of common energy-saving lamp, is 1/10 of incandescent lamp, and the Chinese government is to energy-saving and emission-reduction also unusual attention, propose also to have implemented a series of concrete measures, use the application that Model City's scheme etc. is widelyd popularize the LED street lamp such as " ten thousand in ten cities " LED semiconductor lighting.The LED street lamp is except energy-conservation characteristics, and is also advantageous at secure context.Owing to having adopted low voltage power supply, in the process of installing and using, greatly reduce potential safety hazard, LED is fixing light emitting source simultaneously, without filament and glass shell, anti-falling, antidetonation, rationally the life-span of use reaches 10 years according to its characteristic.
Because LED is the semiconductor device of characteristic sensitivity, has again negative temperature characteristic, therefore in application process, need it is carried out steady-working state and protection, LED can directly connect the electric main of 220V unlike common incandescent lamp bulb.LED is the low voltage drive of 2-3V, must design its normal operation of satisfactory drives.And the composition of relations that the LED street lamp adopts plurality of LEDs lamp pearl series connection usually together, because the discreteness of LED lamp pearl, will cause lamplight brightness inhomogeneous as not adopting constant current to drive, simultaneously because the slight fluctuations of voltage causes the huge fluctuation of electric current, thereby cause LED lamp pearl to reduce because of the overcurrent life-span, even burn.
Summary of the invention
The problem that the utility model mainly solves is: take the characteristics of low voltage power supply according to the LED street lamp, prevent from the installation and maintenance process providing a kind of safe LED street lamp drive circuit because error-polarity connection and people are burning of the element that causes and light source.
For addressing the above problem, the technical solution adopted in the utility model is:
A kind of LED street lamp drive circuit arranges reverse-connection preventing circuit at signal input part, and the output of reverse-connection preventing circuit connects anti-jamming circuit, and the output of anti-jamming circuit connects constant-current circuit, and the output of constant-current circuit connects the led light source circuit.
Described reverse-connection preventing circuit is made of the anti-reverse diode that is connected in parallel on signal input part and the protective tube that is connected on signal input part.
Described anti-jamming circuit is made of the electrochemical capacitor and the ceramic condenser that are arranged in parallel at signal input part.
Constant-current circuit adopts constant current chip, and the input of constant current chip is connected with operating frequency adjusting resistance and light modulation pwm signal; The output of constant current chip is connected with filter capacitor and current sense resistor.
Adopt the utility model of technique scheme, prevent in the installation and maintenance process because error-polarity connection and people are burning of the element that causes and light source by reverse-connection preventing circuit; Provide a reliable operational environment by the clutter in the anti-jamming circuit filter circuit for constant flow module; By constant flow module and a small amount of peripheral components, reach accurately constant current effect and efficient transfer ratio, guarantee each LED brightness, the consistency of colourity, uniformity.By the perfect dimming function of this drive circuit, can make the LED street lamp the Pedestrians and vehicles rareness turn down after midnight brightness, reduce Power operation, thereby further save electric energy.The utility model circuit structure is simple, and peripheral cell is less, and constant current accuracy is high, is convenient in actual applications installation and maintenance.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
As shown in Figure 1, a kind of LED street lamp drive circuit arranges reverse-connection preventing circuit at signal input part, and the output of reverse-connection preventing circuit connects anti-jamming circuit, and the output of anti-jamming circuit connects constant-current circuit, and the output of constant-current circuit connects the led light source circuit.
Reverse-connection preventing circuit is made of the anti-reverse diode D1 that is connected in parallel on signal input part and the protective tube F1 that is connected on signal input part.Anti-jamming circuit is made of the electrochemical capacitor C1 and the ceramic condenser C2 that are arranged in parallel at signal input part.
In the utility model, constant-current circuit adopts constant current chip U1, and in the input of constant current chip U1, the Ron end connects operating frequency adjusting resistance Ron, the DIM end connects the light modulation pwm signal.In the output of constant current chip U1, the Vcc end is connected with filter capacitor C4, SW and Boot end and meets coupling capacitance C3 and is used for driving inner MOSFET work; Between Cs end and LEDs negative pole, current sense resistor Rsns is set.
The current rectifying and wave filtering circuit that is comprised of diode D2 and inductance L 1 carries out work for led light source provides stable electric current.Described diode D2 is Schottky diode, and Schottky diode is connected between SW end and the ground, and inductance L 1 is serially connected with SW end and LED anode.Described led light source circuit is made of plurality of LEDs s.
Claims (4)
1. a LED street lamp drive circuit is characterized in that: at signal input part reverse-connection preventing circuit is set, the output connection anti-jamming circuit of reverse-connection preventing circuit, the output connection constant-current circuit of anti-jamming circuit, the output connection led light source circuit of constant-current circuit.
2. LED street lamp drive circuit according to claim 1 is characterized in that: described reverse-connection preventing circuit is made of the anti-reverse diode that is connected in parallel on signal input part and the protective tube that is connected on signal input part.
3. LED street lamp drive circuit according to claim 1 is characterized in that: described anti-jamming circuit is made of the electrochemical capacitor (C1) and the ceramic condenser (C2) that are arranged in parallel at signal input part.
4. LED street lamp drive circuit according to claim 1 is characterized in that: constant-current circuit adopts constant current chip (U1), and the input of constant current chip (U1) is connected with operating frequency adjusting resistance (Ron) and light modulation pwm signal; The output of constant current chip (U1) is connected with filter capacitor (C4) and current sense resistor (Rsns).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203093201U CN202773124U (en) | 2012-06-29 | 2012-06-29 | LED street lamp drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203093201U CN202773124U (en) | 2012-06-29 | 2012-06-29 | LED street lamp drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202773124U true CN202773124U (en) | 2013-03-06 |
Family
ID=47779661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012203093201U Expired - Fee Related CN202773124U (en) | 2012-06-29 | 2012-06-29 | LED street lamp drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202773124U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104284490A (en) * | 2014-10-09 | 2015-01-14 | 合肥美的电冰箱有限公司 | LED drive circuit and refrigerator |
-
2012
- 2012-06-29 CN CN2012203093201U patent/CN202773124U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104284490A (en) * | 2014-10-09 | 2015-01-14 | 合肥美的电冰箱有限公司 | LED drive circuit and refrigerator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201967212U (en) | Touch dimming LED (light-emitting diode) reading lamp | |
| CN201563268U (en) | Drive circuit for OLED lamp | |
| CN104421755A (en) | Intelligent LED street lamp and control method for LED street lamps | |
| CN201274590Y (en) | LED driving apparatus using commercial power | |
| CN102510605B (en) | Novel LED (light emitting diode) driving circuit and drive method | |
| CN202565531U (en) | Intelligent light controlling system | |
| CN201954334U (en) | Switching constant-current constant-brightness LED lighting source | |
| CN202773124U (en) | LED street lamp drive circuit | |
| CN201425219Y (en) | High-power LED outdoor lighting lamp | |
| CN203734880U (en) | High voltage integration AC LED multistage linear drive device | |
| CN202634793U (en) | Mirror mapping multipath of constant-current LED driver | |
| CN201696949U (en) | High-efficiency and energy-saving LED lighting device | |
| CN207926987U (en) | A kind of SCM Based internet of things type light adjusting circuit | |
| CN201869407U (en) | LED intelligent control circuit | |
| CN202475874U (en) | Light-operated switch with operational amplifier in cooperation with silicon controlled rectifier | |
| CN202679701U (en) | Novel LED drive circuit | |
| CN201163832Y (en) | LED lamp suitable for high tension illumination | |
| CN201270605Y (en) | Synthetic control circuit for LED road lamp | |
| CN203231200U (en) | Pulse superposition sectional dimming LED (light-emitting diode) ceiling lamp | |
| CN103687209A (en) | Alternating-current drive circuit of LED streetlight | |
| CN203301829U (en) | LED lighting drive circuit | |
| CN203309830U (en) | Human body auto-induction LED lamp for construction site temporary lighting | |
| CN203147544U (en) | 360-degree light-emitting pulse superposition subsection type dimming LED bulb lamp, 360-degree light-emitting pulse superposition subsection type candle lamp and 360-degree light-emitting pulse superposition subsection type crystal lamp | |
| CN201589141U (en) | Refrigerator large-power LED illuminating device | |
| CN202857037U (en) | LED light emitting circuit of alternating current power supply |
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 |
Granted publication date: 20130306 Termination date: 20150629 |
|
| EXPY | Termination of patent right or utility model |