CN202269050U - LED fluorescent lamp driver with high power factor - Google Patents
LED fluorescent lamp driver with high power factor Download PDFInfo
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- CN202269050U CN202269050U CN2011203138157U CN201120313815U CN202269050U CN 202269050 U CN202269050 U CN 202269050U CN 2011203138157 U CN2011203138157 U CN 2011203138157U CN 201120313815 U CN201120313815 U CN 201120313815U CN 202269050 U CN202269050 U CN 202269050U
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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
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model discloses an LED fluorescent lamp driver with a high power factor, including an EMC filtering unit, a rectification filtering unit, a PFC unit, an output unit, an LED load, a PFC control circuit and a constant current sampling closed loop control circuit. The output terminal of the EMC filtering unit is connected with the input terminal of the rectification filtering unit; one output terminal of the rectification filtering unit is connected with one input terminal of the PFC unit; the other output terminal of the rectification filtering unit is connected with the input terminal of the PFC control circuit; the output terminal of the PFC control circuit is connected with the other input terminal of the PFC unit; the output terminal of the PFC unit is connected with the input terminal of the output unit; the output terminal of the output unit is connected with the input terminal of the LED load; and the output terminal of the LED load is connected with the input terminal of the PFC control circuit. In the utility model, the power factor is high, and a constant current control effect is provided.
Description
Technical field
The utility model relates to a kind of LED fluorescent lamp driver, particularly relates to a kind of High Power Factor LED fluorescent lamp driver.
Background technology
LED fluorescent lamp driver commonly used in the market is a core with the BP2808 device, is that platform carries out constant current control with the BUCK circuit, and this circuit exists the requirement of input electrochemical capacitor high, and electrochemical capacitor then determines the useful life of LED fluorescent lamp driver.And traditional circuit is under different input voltage patterns, and the power factor of input has big excursion.The characteristics that the LED fluorescent lamp popularizes are energy-conservation, long-lives, use when a large amount of LED fluorescent lamps are concentrated, for rationally using electric power system, then power factor are had higher requirements, and prevent that current harmonics is excessive, cause the current supply line heating and the potential safety hazard of existence.Tradition LED fluorescent lamp driving power supply can't satisfy the specification requirement of High Power Factor, high efficiency, high performance-price ratio simultaneously.
The utility model content
In order to overcome above-mentioned existing in prior technology defective, the utility model provides a kind of High Power Factor LED fluorescent lamp driver, the persevering current control effect of this driving implement.
To achieve these goals, the technical scheme of the utility model is following:
A kind of High Power Factor LED fluorescent lamp driver comprises EMC filter unit, rectification filtering unit, PFC unit, output unit, LED load, PFC control circuit and constant current sampling closed control circuit; The output of said EMC filter unit links to each other with the input of rectification filtering unit; An output of said rectification filtering unit links to each other with an input of PFC unit; Another output of said rectification filtering unit links to each other with the input of PFC control circuit; The output of said PFC control circuit links to each other with another input of PFC unit; The output of said PFC unit links to each other with the input of output unit, and the output of said output unit links to each other with the input of LED load, and the output of said LED load links to each other with the input of PFC control circuit.
Said LED load is composed in series by 120 LEDs.The voltage of the said LED load after the LED series connection is between DC380V-400V.
Said rectification filtering unit has two outputs, an input.Said PFC unit has two inputs, an output.Said PFC control circuit has two inputs, an output.
The beneficial effect of the utility model is, adopts PFC control circuit control circuit, directly boosts, and through constant current sampling closed control circuit constant current pressure limiting sample circuit, power factor is high, has the constant current control action.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Embodiment:
For the technological means, the creation characteristic that make the utility model and reach purpose and be easy to understand and understand, further set forth the utility model below in conjunction with specific embodiment
As shown in the figure; The said a kind of High Power Factor LED fluorescent lamp driver of the utility model comprises EMC filter unit 1, rectification filtering unit 2, PFC unit 3, output unit 4, LED load 5, PFC control circuit 6 and constant current sampling closed control circuit 7; The output of said EMC filter unit 1 links to each other with the input of rectification filtering unit 2; An output of said rectification filtering unit 2 links to each other with an input of PFC unit 3; Another output of said rectification filtering unit 2 links to each other with the input of PFC control circuit 6; The output of said PFC control circuit 6 links to each other with another input of PFC unit 3; The output of said PFC unit 3 links to each other with the input of output unit 4, and the output of said output unit 4 links to each other with the input of LED load 5, and the output of said LED load 5 links to each other with the input of PFC control circuit 6.
Wherein, said LED load 5 is composed in series by 120 LEDs, through being serially connected in the sample resistance in the LED loop, realizes high precision constant current.Overall efficiency can reach more than 92%.Power factor can reach more than 98%.
Wherein, the voltage of the said LED load 5 after the LED series connection is between DC380V-400V.
Wherein, said rectification filtering unit 2 has two outputs, an input.
Wherein, said PFC unit 3 has two inputs, an output.
Wherein, said PFC control circuit 6 has two inputs, an output.
The utility model adopts PFC control circuit 6 control circuits; Directly boost to DC380V-400V, through constant current sampling closed control circuit 7 constant current pressure limiting sample circuits, closed-loop adjustment LED current in loop is to stationary value; Power factor is high, has the constant current control action.
More than show and described the advantage of basic principle, principal character and the utility model of the utility model.The technical staff of the industry should understand; The utility model is not restricted to the described embodiments; The principle of describing in the foregoing description and the specification that the utility model just is described; The utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these variations and improvement all fall in the utility model scope that requires protection.The utility model requires protection range to be defined by appending claims and equivalent thereof.
Claims (6)
1. High Power Factor LED fluorescent lamp driver is characterized in that: it comprises EMC filter unit, rectification filtering unit, PFC unit, output unit, LED load, PFC control circuit and constant current sampling closed control circuit;
The output of said EMC filter unit links to each other with the input of rectification filtering unit; An output of said rectification filtering unit links to each other with an input of PFC unit; Another output of said rectification filtering unit links to each other with the input of PFC control circuit; The output of said PFC control circuit links to each other with another input of PFC unit; The output of said PFC unit links to each other with the input of output unit, and the output of said output unit links to each other with the input of LED load, and the output of said LED load links to each other with the input of PFC control circuit.
2. according to the said a kind of High Power Factor LED fluorescent lamp driver of claim 1, it is characterized in that: said LED load is composed in series by 120 LEDs.
3. according to the said a kind of High Power Factor LED fluorescent lamp driver of claim 2, it is characterized in that: the voltage of the said LED load after the LED series connection is between DC380V-400V.
4. according to the said a kind of High Power Factor LED fluorescent lamp driver of claim 1, it is characterized in that: said rectification filtering unit has two outputs, an input.
5. according to the said a kind of High Power Factor LED fluorescent lamp driver of claim 1, it is characterized in that: said PFC unit has two inputs, an output.
6. according to the said a kind of High Power Factor LED fluorescent lamp driver of claim 1, it is characterized in that: said PFC control circuit has two inputs, an output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203138157U CN202269050U (en) | 2011-08-25 | 2011-08-25 | LED fluorescent lamp driver with high power factor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203138157U CN202269050U (en) | 2011-08-25 | 2011-08-25 | LED fluorescent lamp driver with high power factor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202269050U true CN202269050U (en) | 2012-06-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203138157U Expired - Fee Related CN202269050U (en) | 2011-08-25 | 2011-08-25 | LED fluorescent lamp driver with high power factor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202269050U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102740562A (en) * | 2012-06-13 | 2012-10-17 | 青岛海信电器股份有限公司 | Power control circuit, backlight module and liquid crystal display device |
-
2011
- 2011-08-25 CN CN2011203138157U patent/CN202269050U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102740562A (en) * | 2012-06-13 | 2012-10-17 | 青岛海信电器股份有限公司 | Power control circuit, backlight module and liquid crystal display device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120606 Termination date: 20120825 |