CN202077229U - Driving circuit for LED lamp - Google Patents
Driving circuit for LED lamp Download PDFInfo
- Publication number
- CN202077229U CN202077229U CN2011201224923U CN201120122492U CN202077229U CN 202077229 U CN202077229 U CN 202077229U CN 2011201224923 U CN2011201224923 U CN 2011201224923U CN 201120122492 U CN201120122492 U CN 201120122492U CN 202077229 U CN202077229 U CN 202077229U
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- circuit
- led lamp
- electrically connected
- power factor
- lamp drive
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Abstract
The utility model relates to a driving circuit for an LED lamp. The driving circuit for an LED lamp comprises an input circuit, an output circuit, and a control circuit electrically connected therebetween. The control circuit comprises a main control chip, a power factor correction function circuit and a pulse width modulation function circuit, wherein the power factor correction function circuit and the pulse width modulation function circuit are disposed at the peripheral of the main control chip. According to the utility model, the adoption of the circuit with the main control chip realizes two functions of the power factor correction and the pulse width modulation, thereby avoiding a technical problem of the prior art that too many complex elements are arranged around a main control chip, improving the efficiency, saving the cost, and enhancing the reliability.
Description
Technical field
The utility model relates to the drive circuit technical field, relates in particular to a kind of LED lamp drive circuit.
Background technology
Along with people are more and more higher to the requirement of environmental protection illumination, the LED lamp illumination that integrates plurality of advantages such as low energy consumption, high light efficiency, long service life replaces traditional fluorescent lighting and incandescent lighting gradually, is applied to indoor and outdoor lighting more and more widely.
The inventor is in implementing the utility model process, and find that there is following technical problem at least in the LED illuminating lamp of being sold on the existing market: the control chip and the peripheral element of employing are more, and design is complicated, efficient is low, cost is high, the shortcoming of poor reliability.
The utility model content
The utility model embodiment technical problem to be solved is, provides that a kind of simplicity of design, efficient height, cost are low, the LED lamp drive circuit of good reliability.
For solving the problems of the technologies described above, a kind of LED lamp drive circuit is provided, input circuit, output circuit and be electrically connected on control circuit between described input circuit and the output circuit, this control circuit comprises main control chip and peripheral power factor emendation function circuit and pulse width modulation function circuit thereof.
Further, described power factor emendation function circuit and pulse width modulation function circuit comprise current supply circuit, drive circuit, current-sensing circuit, circuit of power factor correction and the power factor correction loop that is electrically connected on described main control chip respectively.
Further, described control circuit also comprises the absorption circuit that is electrically connected on described input circuit, the voltage stabilizing circuit that is electrically connected on described output circuit and current stabilization circuit.
Further, described voltage stabilizing circuit, current stabilization circuit all are electrically connected on the TSM103 chip.
Further, described input circuit comprises electric current place in circuit, Electro Magnetic Compatibility circuit and the input rectifying filter circuit that is electrically connected successively, and described output circuit is an output rectifier and filter.
Further, described input rectifying filter circuit adopts bridge rectifier and pursues the stream filter circuit.
Technique scheme has following beneficial effect at least: because adopted the circuit that only uses a main control chip to finish the technological means of power factor correction and pulse width modulation two functions, prior art adopts control chip and peripheral element is more, design complicated technology problem so overcome, and then has reached lifting efficient, saving cost, enhancing technology of dependability effect.
Description of drawings
Fig. 1 is the theory diagram of the LED lamp drive circuit of the utility model embodiment.
Fig. 2 is the circuit diagram of LED lamp drive circuit correspondence shown in Figure 1.
Embodiment
Please refer to Fig. 1～Fig. 2, the LED lamp drive circuit of the utility model embodiment is used to LED lamp 100 that driving power is provided, and comprises the input circuit 10 that is used for a rectifying and wave-filtering; Being used for the secondary rectifying and wave-filtering provides the output circuit 20 of driving power for LED lamp 100; Be electrically connected on the control circuit 30 between input circuit 10 and the output circuit 20.
To sum up, as shown in Figure 2, PFC and PWM two functions have been realized simultaneously owing to adopt the main control chip of single PFC function, reached following effect: (1) high PF (the power back-off factor of power supply) value, when 230/50Hz, reach 0.94, when 115V/60Hz, reach 0.99, satisfy the harmonic requirement of EN61000-3-2 (current harmonics quality standard) simultaneously; (2) high efficiency can reach 87% when 230/50Hz; (3) because the function that will be usually resolves into PWM and PFC as the chip of PFC function is used, just saved a control chip and peripheral element, the space of having saved power supply greatly with reduced volume, the while has also been reduced cost.
The above is an embodiment of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also are considered as protection range of the present utility model.
Claims (6)
1. a LED lamp drive circuit is characterized in that, comprising:
Input circuit, output circuit and be electrically connected on control circuit between described input circuit and the output circuit, this control circuit comprises main control chip and peripheral power factor emendation function circuit and pulse width modulation function circuit thereof.
2. LED lamp drive circuit as claimed in claim 1, it is characterized in that described power factor emendation function circuit and pulse width modulation function circuit comprise current supply circuit, drive circuit, current-sensing circuit, circuit of power factor correction and the power factor correction loop that is electrically connected on described main control chip respectively.
3. LED lamp drive circuit as claimed in claim 1 is characterized in that, described control circuit also comprises the absorption circuit that is electrically connected on described input circuit, the voltage stabilizing circuit that is electrically connected on described output circuit and current stabilization circuit.
4. LED lamp drive circuit as claimed in claim 3 is characterized in that described voltage stabilizing circuit, current stabilization circuit all are electrically connected on the TSM103 chip.
5. LED lamp drive circuit as claimed in claim 1 is characterized in that, described input circuit comprises electric current place in circuit, Electro Magnetic Compatibility circuit and the input rectifying filter circuit that is electrically connected successively, and described output circuit is an output rectifier and filter.
6. LED lamp drive circuit as claimed in claim 5 is characterized in that, described input rectifying filter circuit adopts bridge rectifier and pursues the stream filter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201224923U CN202077229U (en) | 2011-04-22 | 2011-04-22 | Driving circuit for LED lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201224923U CN202077229U (en) | 2011-04-22 | 2011-04-22 | Driving circuit for LED lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202077229U true CN202077229U (en) | 2011-12-14 |
Family
ID=45115303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201224923U Expired - Fee Related CN202077229U (en) | 2011-04-22 | 2011-04-22 | Driving circuit for LED lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202077229U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103369792A (en) * | 2013-07-15 | 2013-10-23 | 安徽世林照明股份有限公司 | LED drive circuit |
-
2011
- 2011-04-22 CN CN2011201224923U patent/CN202077229U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103369792A (en) * | 2013-07-15 | 2013-10-23 | 安徽世林照明股份有限公司 | LED drive circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: JIANGSU TENGWEI ELECTRONICS CO.,LTD. Free format text: FORMER OWNER: SHENZHEN CITY TENGWEI ELECTRONIC CO., LTD. Effective date: 20120516 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 518000 SHENZHEN, GUANGDONG PROVINCE TO: 223001 HUAIAN, JIANGSU PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120516 Address after: 223001 No. 158 Health West Road, Jinhu County, Jiangsu, Huaian Patentee after: JIANGSU TENWEI ELECTRONIC CO., LTD. Address before: 518000, Guangdong Province, Shenzhen Town, Fuyong Baoan District Qiaotou village Fu Qiao Industrial three District 11 Patentee before: Shenzhen City Tengwei Electronic Co., Ltd. |
|
| 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: 20111214 Termination date: 20190422 |