CN203368842U - A LED driving circuit - Google Patents
A LED driving circuit Download PDFInfo
- Publication number
- CN203368842U CN203368842U CN2013203904653U CN201320390465U CN203368842U CN 203368842 U CN203368842 U CN 203368842U CN 2013203904653 U CN2013203904653 U CN 2013203904653U CN 201320390465 U CN201320390465 U CN 201320390465U CN 203368842 U CN203368842 U CN 203368842U
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- flyback
- control unit
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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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- 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
Abstract
The utility model discloses a LED driving circuit comprising a rectifying and filtering unit, a rectifying and filtering output circuit, a feedback control unit, a PWM constant-current topological structure unit, and a master control unit. The master control unit comprises a PFC correction circuit. The PFC correction circuit comprises a PFC power correction chip, a flyback output voltage circuit, a PWM boost topological structure circuit. The flyback output voltage circuit comprises a degaussing time and valley voltage sampling circuit and a flyback input control circuit. The LED driving circuit has beneficial effects that the output power of the driving circuit is 100 to 140W, that the power factor of the driving circuit is more than 0.95, that the power efficiency of the driving circuit is more than 88 percent, that the LED driving circuit greatly increases the power factor of an outdoor LED lighting device and the performance stability of a large-power driving power supply, and that the LED driving circuit is beneficial to achievement of the popularization of LED outdoor large-power lighting device driving power supplies.
Description
Technical field
The utility model relates to a kind of drive circuit, is specifically related to a kind of LED drive circuit.
Background technology
Along with quick step propelling and the economic fast development of Urbanization in China, increasing to the demand gap of the energy.And to fill up Chinese Urbanization and the economic development demand gap to the energy, to greatly develop clean new forms of energy on the one hand, as nuclear energy, solar energy and wind energy, but new energy development is not pessimistic, therefore, adopt efficient, advanced illumination management system, by eliminating low usefulness illuminator, will produce major contribution to China's " energy-saving and emission-reduction engineering ".
And what answer in contrast is exactly the existence of the large-scale exterior illumination system of economizing type, with the conventional light source difference be that energy-saving effect and the power supply of LED light fixture is closely related, and the high-power LED driving power is realized high efficiency, high power factor and high stability are to the national grid contribution greatly, different from indoor LED lighting, its drive principle also is not suitable for outdoor high-power driving power supply, therefore, the utility model adopts advanced investigative technique and accurate checkout equipment to improve the performance of driving power, the outdoor high-power solid LED lighting device required for difference, make the various high efficiency drive power solution combinations for vertical applications, guarantee high efficiency and the long-life property of LED lighting device and high-power outdoor illuminating lamp.
The utility model content
The purpose of this utility model is to provide a kind of LED drive circuit and LED driving method, by input electrical signal being carried out to power rectification, flyback conversion booster tension, and by the PWM governor circuit, output current is fed back to monitoring, overcome the deficiency that existing driving power can't drive great power LED, thereby realized the purpose of this utility model.
The technical problem that the utility model solves can realize by the following technical solutions:
A kind of LED drive circuit, comprise rectification filtering unit and a main control unit of a connection ac input end, wherein:
Main control unit mainly comprises:
The one PFC correcting circuit be connected with rectification filtering unit, this PFC correcting circuit comprises a PFC capability correction chip and the flyback output voltage circuit, the PWM Boost topology structural circuit that are connected with this PFC capability correction chip respectively; Wherein, flyback output voltage circuit comprises a degaussing time and valley voltage sample circuit, a flyback input control circuit;
LED drive circuit also comprises:
One rectifying and wave-filtering output circuit;
One is located at the feedback control unit between PFC correcting circuit and rectifying and wave-filtering output circuit, and this feedback control unit comprises an isolation optocoupler feedback circuit, first, second amplifier unit and the auxiliary power circuit for powering to isolation optocoupler feedback unit, first, second amplifier unit;
The one PWM constant current topological structure unit be connected with feedback control unit.
In a preferred embodiment of the present utility model, rectification filtering unit specifically comprises an EMI filter unit and a bridge rectifier, and wherein the EMI filter unit is connected with ac input end, and bridge rectifier is connected with the EMI filter unit.
Especially, it should be noted that, the EMI filter unit of rectification filtering unit comprises at least two stage filter circuit.
In a preferred embodiment of the present utility model, isolation optocoupler feedback circuit specifically comprises an infrared light-emitting diode and a phototransistor, between infrared light-emitting diode, phototransistor, intercouples.
In a preferred embodiment of the present utility model, flyback output voltage circuit is specially a flyback DC/DC and transforms output circuit.
In a preferred embodiment of the present utility model, PFC capability correction chip is specially a TEA1752 control chip.
A kind of LED driving method, comprise the steps:
1) at ac input end, one current rectifying and wave filtering circuit is set, input AC is converted into to direct current;
2) a PFC correcting circuit, circuit of power factor correction and flyback are set and transform booster circuit, with the output of the signal to after rectifying and wave-filtering carry out power factor correction, flyback transforms and boosts;
3) by the rectification again of the signal after boosting, filtering to generate output current, one feedback control unit is set simultaneously, feedback control unit comprises an optic coupling element and the operational amplifier be connected with this optic coupling element, after by this operational amplifier, output current signal being sampled, feeds back to optic coupling element;
4) pwm control circuit is set, this pwm control circuit transforms booster circuit with circuit of power factor correction, flyback respectively and is connected, and this pwm control circuit transforms the output of booster circuit according to the current signal Modulating Power factor correcting circuit on optic coupling element, flyback.
The beneficial effects of the utility model are:
The power output of drive circuit is 100～104W, power factor is greater than 0.95, power-efficient is greater than 88%, greatly improve the raising of outdoor LED lighting device power factor and the stability of high-power driving power supply, contributed to realize the popularization of the outdoor High Power Illuminator driving power of LED.
The accompanying drawing explanation
Fig. 1 is rectification filtering unit circuit diagram in the specific implementation described in a kind of LED drive circuit described in the utility model.
Fig. 2 is main control unit circuit diagram in the specific implementation described in a kind of LED drive circuit described in the utility model.
Fig. 3 is feedback control unit circuit diagram in the specific implementation described in a kind of LED drive circuit described in the utility model.
Fig. 4 is circuit diagram in the specific implementation in a kind of LED drive circuit described in the utility model.
Fig. 5 be a kind of LED driving method described in the utility model in the specific implementation schematic flow sheet.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with embodiment, further set forth the utility model.
A kind of LED drive circuit, the rectification filtering unit and the main control unit that comprise a connection ac input end, wherein main control unit mainly comprises the PFC correcting circuit be connected with rectification filtering unit, this PFC correcting circuit comprises a PFC capability correction chip and the flyback output voltage circuit, the PWM Boost topology structural circuit that are connected with this PFC capability correction chip respectively, and this PFC correcting circuit is realized the adjustment of power factor in conjunction with PWM Boost topology construction unit.
In the present embodiment, PFC capability correction chip is specially a TEA1752 control chip, shown in Figure 1, being described as follows of each pin of this TEA1752 control chip:
Flyback output voltage circuit wherein is specially a flyback DC/DC and transforms output circuit, and it comprises a degaussing time and valley voltage sample circuit, a flyback input control circuit.
In addition, this LED drive circuit also comprises the rectifying and wave-filtering output circuit, is located at feedback control unit and PWM constant current topological structure unit between PFC correcting circuit and rectifying and wave-filtering output circuit, wherein, in the present embodiment, rectification filtering unit specifically comprises an EMI filter unit and a bridge rectifier 10, shown in Figure 2, wherein the EMI filter unit is connected with ac input end, the EMI filter unit of rectification filtering unit comprises first, second filter circuit, and bridge rectifier is connected with the EMI filter unit.
Referring to Fig. 3, feedback control unit comprises an isolation optocoupler feedback circuit, first, second amplifier unit and the auxiliary power circuit (accessory power supply output 12V power voltage supply in the present embodiment) for powering to isolation optocoupler feedback unit, first, second amplifier unit; In the present embodiment, isolation optocoupler feedback circuit specifically comprises an infrared light-emitting diode and a phototransistor, between infrared light-emitting diode, phototransistor, intercouple, first, second amplifier unit is specially operational amplifier, by operational amplifier, comparison signal is fed back to isolation optocoupler feedback unit, make its with main circuit in form feedback effect between optic coupling element, and then the constancy of electric current in the adjustment main circuit, improve power-efficient, increase the electrical source power factor value.
PWM constant current topological structure unit is connected to realize that the circuit constant current controls with feedback control unit, this PWM constant current topological structure is shown in Figure 4 with the integrated circuit of above-mentioned main control unit, rectifying and wave-filtering output circuit, feedback control unit formation.
The power output of LED drive circuit of the present utility model is 100～104W, power factor is greater than 0.95, power-efficient is greater than 88%, greatly improve the raising of outdoor LED lighting device power factor and the stability of high-power driving power supply, contributed to realize the popularization of the outdoor High Power Illuminator driving power of LED.
As shown in Figure 5, a kind of LED driving method, comprise the steps:
1) at ac input end, one current rectifying and wave filtering circuit is set, input AC is converted into to direct current;
2) a PFC correcting circuit, circuit of power factor correction and flyback are set and transform booster circuit, with the output of the signal to after rectifying and wave-filtering carry out power factor correction, flyback transforms and boosts;
3) by the rectification again of the signal after boosting, filtering to generate output current, one feedback control unit is set simultaneously, feedback control unit comprises an optic coupling element and the operational amplifier be connected with this optic coupling element, after by this operational amplifier, output current signal being sampled, feeds back to optic coupling element;
4) pwm control circuit is set, this pwm control circuit transforms booster circuit with circuit of power factor correction, flyback respectively and is connected, and this pwm control circuit transforms the output of booster circuit according to the current signal Modulating Power factor correcting circuit on optic coupling element, flyback.
Above demonstration and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (6)
1. a LED drive circuit comprises and it is characterized in that rectification filtering unit and a main control unit of a connection ac input end:
Described main control unit mainly comprises:
The one PFC correcting circuit be connected with described rectification filtering unit, this PFC correcting circuit comprises a PFC capability correction chip and the flyback output voltage circuit, the PWM Boost topology structural circuit that are connected with this PFC capability correction chip respectively; Wherein, described flyback output voltage circuit comprises a degaussing time and valley voltage sample circuit, a flyback input control circuit;
Described LED drive circuit also comprises:
One rectifying and wave-filtering output circuit;
One is located at the feedback control unit between described PFC correcting circuit and rectifying and wave-filtering output circuit, and this feedback control unit comprises an isolation optocoupler feedback circuit, first, second amplifier unit and the auxiliary power circuit for powering to described isolation optocoupler feedback unit, first, second amplifier unit;
The one PWM constant current topological structure unit be connected with described feedback control unit.
2. a kind of LED drive circuit as claimed in claim 1, it is characterized in that, described rectification filtering unit specifically comprises an EMI filter unit and a bridge rectifier, and wherein said EMI filter unit is connected with described ac input end, and described bridge rectifier is connected with the EMI filter unit.
3. a kind of LED drive circuit as claimed in claim 2, is characterized in that, the EMI filter unit of described rectification filtering unit comprises at least two stage filter circuit.
4. a kind of LED drive circuit as claimed in claim 1, is characterized in that, described isolation optocoupler feedback circuit specifically comprises an infrared light-emitting diode and a phototransistor, between described infrared light-emitting diode, phototransistor, intercouples.
5. a kind of LED drive circuit as claimed in claim 1, is characterized in that, described flyback output voltage circuit is specially a flyback DC/DC and transforms output circuit.
6. a kind of LED drive circuit as claimed in claim 1, is characterized in that, described PFC capability correction chip is specially a TEA1752 control chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203904653U CN203368842U (en) | 2013-07-02 | 2013-07-02 | A LED driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203904653U CN203368842U (en) | 2013-07-02 | 2013-07-02 | A LED driving circuit |
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| Publication Number | Publication Date |
|---|---|
| CN203368842U true CN203368842U (en) | 2013-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203904653U Expired - Fee Related CN203368842U (en) | 2013-07-02 | 2013-07-02 | A LED driving circuit |
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| CN (1) | CN203368842U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105491758A (en) * | 2015-12-11 | 2016-04-13 | 中山市尊宝实业有限公司 | New energy-efficiency standard energy-saving circuit with high power factor and ultra-low stand-by power consumption |
| CN107979280A (en) * | 2017-12-07 | 2018-05-01 | 深圳市华星光电技术有限公司 | Power factor correction circuit and circuit of reversed excitation |
-
2013
- 2013-07-02 CN CN2013203904653U patent/CN203368842U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105491758A (en) * | 2015-12-11 | 2016-04-13 | 中山市尊宝实业有限公司 | New energy-efficiency standard energy-saving circuit with high power factor and ultra-low stand-by power consumption |
| CN107979280A (en) * | 2017-12-07 | 2018-05-01 | 深圳市华星光电技术有限公司 | Power factor correction circuit and circuit of reversed excitation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20161229 Address after: 200436 room No. 999, Lane 148, new lane two, Shanghai, Baoshan District Patentee after: Shanghai Top Digital Technology Co., Ltd. Address before: 201203 Shanghai Zhangjiang High Tech Park of Pudong New Area Cailun Road Lane 1619 No. 1 room 3100 Patentee before: Shanghai LigntSky Optoelectronics Technology Co., Ltd. |
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| 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: 20131225 Termination date: 20210702 |