CN203039947U - High-efficiency LED lamp driving circuit - Google Patents
High-efficiency LED lamp driving circuit Download PDFInfo
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- CN203039947U CN203039947U CN2012205775135U CN201220577513U CN203039947U CN 203039947 U CN203039947 U CN 203039947U CN 2012205775135 U CN2012205775135 U CN 2012205775135U CN 201220577513 U CN201220577513 U CN 201220577513U CN 203039947 U CN203039947 U CN 203039947U
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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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The utility model discloses a high-efficiency LED lamp driving circuit which comprises a capacitive reactance current-limiting circuit, a rectifying and filtering circuit and an over-voltage and over-current protection circuit, wherein a voltage-stabilization and constant-current circuit is connected in parallel to two ends of the over-voltage and over-current protection circuit and is used to drive an LED lamp. According to the utility model, an LED lamp is driven by the voltage-stabilization and constant-current circuit after rectifying and filtering, the output voltage and current are stable and reliable, the flickering phenomenon is effectively avoided, the light-emitting brightness is strong and the light is even and soft; and meanwhile, the whole driving circuit is simple, high in electricity saving efficiency, long in service life and safe and reliable in operation.
Description
Technical field
The utility model relates to drive circuit, especially a kind of efficient LED lamp drive circuit.
Background technology
At present, existing illuminating lamp mainly contains bulb, incandescent lamp and U-shaped lamp, in use has shortcomings such as power loss is big, working temperature is high, useful life is short, though U-shaped electricity-saving lamp also has certain energy-saving effect, but brightness is relatively low, and not exclusively possesses maintainability; And the LED lamp has caused both domestic and external showing great attention to because having characteristics such as luminance height, spectral distribution is even, energy-efficient, the life-span is long, low pressure is controlled.The design of the drive circuit of LED lamp directly affects the performance of LED lamp superperformance, and the drive circuit of great power LED adopts the capacitance decompression structure at present, has circuit advantage simple, with low cost, but has output current instability, inefficient shortcoming.
The utility model content
The technical problems to be solved in the utility model is in order to overcome above-mentioned defective, and a kind of efficient LED lamp drive circuit of energy-efficient, outputting current steadily is provided.
In order to solve the problems of the technologies described above; the technical scheme that the utility model adopts is: a kind of efficient LED lamp drive circuit; comprise capacitive reactance current-limiting circuit, current rectifying and wave filtering circuit, over-voltage over-current protection circuit; described over-voltage over-current protection circuit two ends are parallel with the pressure-stabilizing constant flow circuit, pressure-stabilizing constant flow drives LED lamp.
Described pressure-stabilizing constant flow circuit is made of triode T1, triode T2, divider resistance R2, adjustable resistance R3, divider resistance R2 and triode T2 are attempted by the dc output end of current rectifying and wave filtering circuit, the collector electrode of T2 is connected with the base stage of T1, the emitter of triode T1 links to each other with adjustable resistance R3, adjustable resistance R3 is attempted by between the base stage and emitter of triode T2, the base stage of triode T2 links to each other with the emitter of triode T1, and the LED lamp is serially connected between the collector electrode of rectification filter circuit output end and triode T1.
Described LED lamp is made up of many pieces of LED connection in series-parallel.
The beneficial effects of the utility model: by through behind the rectifying and wave-filtering, adopt pressure-stabilizing constant flow drives LED lamp, make output voltage, current stabilization reliable, avoided flickering effectively, luminosity is strong, light is evenly soft; Whole drive circuit is simple simultaneously, electric energy is high, long service life, safe and reliable to operation.
Description of drawings
Fig. 1 is circuit block diagram of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated.
As shown in Figure 1 and Figure 2, the efficient LED lamp drive circuit includes capacitive reactance current-limiting circuit that resistance R 1 and capacitor C 1 compose in parallel, full bridge rectifier D and the filter circuit that is made of capacitor C 2 and the protective circuit of diode D5, and protective circuit and pressure-stabilizing constant flow circuit also connect; The pressure-stabilizing constant flow circuit mainly is made of triode T1, triode T2, divider resistance R2, adjustable resistance R3, divider resistance R2 and triode T2 are attempted by the dc output end of current rectifying and wave filtering circuit, the collector electrode of T2 is connected with the base stage of T1, the emitter of triode T1 links to each other with adjustable resistance R3, adjustable resistance R3 is attempted by between the base stage and emitter of triode T2, the base stage of triode T2 links to each other with the emitter of triode T1, and the LED lamp is serially connected between the collector electrode of rectification filter circuit output end and triode T1.
During circuit working, exchange input, the capacitive reactance current-limiting circuit can effectively be controlled the maximum current limliting of input current, through rectification circuit, filter circuit and voltage stabilizing circuit, the high pressure that forms when preventing load open circuit damages the rectifying and wave-filtering device, and the direct voltage of output is applied to pressure-stabilizing constant flow circuit and LED lamp.Make LED modulating voltage, current stabilization reliable like this, avoided flickering effectively, luminosity is strong, light is evenly soft; Whole drive circuit is simple simultaneously, electric energy is high, long service life, safe and reliable to operation.
Claims (3)
1. an efficient LED lamp drive circuit comprises capacitive reactance current-limiting circuit, current rectifying and wave filtering circuit, over-voltage over-current protection circuit, it is characterized in that: the over-voltage over-current protection circuit two ends are parallel with the pressure-stabilizing constant flow circuit, pressure-stabilizing constant flow drives LED lamp.
2. efficient LED lamp drive circuit as claimed in claim 1, it is characterized in that: the pressure-stabilizing constant flow circuit is by triode T1, triode T2, divider resistance R2, adjustable resistance R3 constitutes, divider resistance R2 and triode T2 are attempted by the dc output end of current rectifying and wave filtering circuit, the collector electrode of T2 is connected with the base stage of T1, the emitter of triode T1 links to each other with adjustable resistance R3, adjustable resistance R3 is attempted by between the base stage and emitter of triode T2, the base stage of triode T2 links to each other with the emitter of triode T1, and the LED lamp is serially connected between the collector electrode of rectification filter circuit output end and triode T1.
3. efficient LED lamp drive circuit as claimed in claim 1 or 2, it is characterized in that: the LED lamp is made up of many pieces of LED connection in series-parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205775135U CN203039947U (en) | 2012-11-05 | 2012-11-05 | High-efficiency LED lamp driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205775135U CN203039947U (en) | 2012-11-05 | 2012-11-05 | High-efficiency LED lamp driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203039947U true CN203039947U (en) | 2013-07-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012205775135U Expired - Fee Related CN203039947U (en) | 2012-11-05 | 2012-11-05 | High-efficiency LED lamp driving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203039947U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103648214A (en) * | 2013-12-03 | 2014-03-19 | 北京经纬恒润科技有限公司 | Illuminating lamp control system |
-
2012
- 2012-11-05 CN CN2012205775135U patent/CN203039947U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103648214A (en) * | 2013-12-03 | 2014-03-19 | 北京经纬恒润科技有限公司 | Illuminating lamp control system |
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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 |
Granted publication date: 20130703 Termination date: 20151105 |
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| EXPY | Termination of patent right or utility model |