CN203368854U - LED lamp drive circuit - Google Patents
LED lamp drive circuit Download PDFInfo
- Publication number
- CN203368854U CN203368854U CN2013204469014U CN201320446901U CN203368854U CN 203368854 U CN203368854 U CN 203368854U CN 2013204469014 U CN2013204469014 U CN 2013204469014U CN 201320446901 U CN201320446901 U CN 201320446901U CN 203368854 U CN203368854 U CN 203368854U
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- CN
- China
- Prior art keywords
- led lamp
- circuit
- drive circuit
- controlled oscillator
- voltage controlled
- 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
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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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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses an LED lamp drive circuit which comprises a rectification circuit, a voltage controlled oscillator, a switch element and a filter circuit, wherein the input end of the rectification circuit is connected to commercial power, the output end of the rectification circuit is connected to the input end of the voltage controlled oscillator, the output end of the voltage controlled oscillator is connected to the input end of the filter circuit through the switch element, and the output end of the filter circuit is connected to an LED lamp. The duty ratio of the pulse of output current varies with the input voltage, so that the actual power the LED lamp may not be affected by the voltage or current of external power. When a plurality of LED lamp are used in combination, other associated LED lamp beads may not be damaged or affected due to damage of one LED lamp bead. The LED lamp drive circuit is simple in structure, the drive chip is made smaller, and the restriction of the driving chip on the LED lamp is reduced.
Description
Technical field
The utility model relates to LED lamp field, is specifically related to the drive circuit of LED lamp.
Background technology
The LED lamp with ordinary lamp and lantern, compare have energy-conservation, the life-span is long, applicability good, the response time is short, environmental protection, lamp advantage lucuriant in design; But the LED lamp needs special drive circuit control lamp luminescence, the light fixture that drive circuit and LED lamp are combined as a whole is arranged at present, the light fixture that drive circuit and lamp socket are combined as a whole is also arranged; But the LED lamp drive circuit of prior art only has constant current control and constant voltage to control two kinds of modes, when externally fluctuation occurs in the voltage of power supply or electric current, the power of LED lamp also can produce fluctuation, the luminous intensity that light fixture sends on the one hand can change, and can therefore reduce the useful life of light fixture on the other hand.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of LED lamp drive circuit, can solve prior art adopts the drive circuit of constant current or constant voltage mode to control the LED lamp, light fixture fluctuates with voltage or the current fluctuation of externally fed, affects the problem in light fixture luminous intensity and useful life.
The utility model is achieved through the following technical solutions:
A kind of LED lamp drive circuit, comprise rectification circuit, voltage controlled oscillator, switch element, filter circuit, the input of described rectification circuit connects civil power, the output of described rectification circuit connects the input of voltage controlled oscillator, the output of described voltage controlled oscillator connects the input of filter circuit by switch element, the output of described filter circuit connects the LED lamp.
The further improvement of the utility model scheme is that described switch element is the CMOS transistor.
The utility model being a little compared with prior art:
One, modulate the duty ratio of output current wave by voltage controlled oscillator, be that high its pulse duration of voltage is just narrow, otherwise equate with regard to roomy each pulse power effective value that makes with regard to pulse duration, thereby realize that the actual power of LED lamp is constant, be not subject to voltage or the current affects of externally fed;
Two,, when a plurality of LED lamps are used in combination, can not cause because of the damage of certain LED lamp pearl the association damage of other LED lamp pearl or operating state to worsen;
Three, simple in structure, realize driving the miniaturization of chip, reduce and drive the restriction of chip to the LED lamp.
The accompanying drawing explanation
Fig. 1 is a kind of LED lamp drive circuit structured flowchart of the present utility model.
Fig. 2 is a kind of LED lamp drive circuit schematic diagram of the present utility model.
Embodiment
A kind of LED lamp drive circuit as shown in Figure 2, comprise rectification circuit, voltage controlled oscillator, CMOS transistor, filter circuit, the input of described rectification circuit connects civil power, the output of described rectification circuit connects the input of voltage controlled oscillator, the output of described voltage controlled oscillator connects the input of filter circuit by the CMOS transistor, the output of described filter circuit connects the LED lamp.
Claims (2)
1. a LED lamp drive circuit, it is characterized in that: comprise rectification circuit, voltage controlled oscillator, switch element, filter circuit, the input of described rectification circuit connects civil power, the output of described rectification circuit connects the input of voltage controlled oscillator, the output of described voltage controlled oscillator connects the input of filter circuit by switch element, the output of described filter circuit connects the LED lamp.
2. a kind of LED lamp drive circuit as claimed in claim 1, it is characterized in that: described switch element is the CMOS transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204469014U CN203368854U (en) | 2013-07-25 | 2013-07-25 | LED lamp drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204469014U CN203368854U (en) | 2013-07-25 | 2013-07-25 | LED lamp drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203368854U true CN203368854U (en) | 2013-12-25 |
Family
ID=49816562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013204469014U Expired - Fee Related CN203368854U (en) | 2013-07-25 | 2013-07-25 | LED lamp drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203368854U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103354687A (en) * | 2013-07-25 | 2013-10-16 | 江苏昌泽电子有限公司 | LED lamp driving circuit |
-
2013
- 2013-07-25 CN CN2013204469014U patent/CN203368854U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103354687A (en) * | 2013-07-25 | 2013-10-16 | 江苏昌泽电子有限公司 | LED lamp driving circuit |
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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: 20131225 Termination date: 20140725 |
|
| EXPY | Termination of patent right or utility model |