CN204559941U - A kind of New LED driving power - Google Patents
A kind of New LED driving power Download PDFInfo
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- CN204559941U CN204559941U CN201520166492.1U CN201520166492U CN204559941U CN 204559941 U CN204559941 U CN 204559941U CN 201520166492 U CN201520166492 U CN 201520166492U CN 204559941 U CN204559941 U CN 204559941U
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- apfc
- filter
- factor corrector
- power factor
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Abstract
The utility model discloses a kind of New LED driving power, comprise filter, DC/DC isolating converter, described New LED driving power also comprises APFC power factor corrector, LLC resonant controller, described filter comprises EMI low pass filter, rectifier filter, described EMI low pass filter is connected with rectifier filter, the output of described rectifier filter is connected with the main circuit of APFC power factor corrector, described APFC power factor corrector also comprises APFC controller, described APFC controller controls the main circuit of employing peak value comparison method mode to APFC power factor corrector, the output of described APFC converter circuit connects DC/DC isolating converter, the output of described DC/DC isolating converter connects LED load, the working condition of described LED load feeds back to LLC resonant controller by constant current voltage limiting, the output of described LLC resonant controller connects DC/DC isolating converter and forms feedback loop.
Description
Technical field
The utility model relates to a kind of driving power, especially relates to a kind ofly can solving energy shortage and the ecological New LED driving power beautifying problem.
Background technology
Along with environment and energy problem are paid close attention to by people day by day, energy-saving and emission-reduction have become the focus of discussion.And electric consumption on lighting occupies certain proportion in the gross generation of various countries.China illumination consume accounted for 12% of national gross generation, and with annual 5% speed increase.And the current illumination of China is mainly based on the illumination of poor efficiency, adopts the mains lighting supply of high efficiency, good reliability as seen, has profound significance to energy-saving and emission-reduction.After the green illumination that in January, 1991, first EPA proposed, the research about green illumination gets more and more, and become concept and the hot technology of lighting field, relevant research also gets more and more.China came into effect Green Lighting Project in 1996, and by developing and promote efficiently, energy-saving illumination utensil saves lighting electricity consumption, and reduce environmental pollution, establish brand-new illuminator, compared to traditional lighting source, large function LED has many advantages.If can utilize the LED light source of energy-conserving and environment-protective, can ensure quality and the effect of illumination, the shortage and the biological environment that solve the energy beautify problem simultaneously, meet the requirement of environmental protection, therefore, just have higher requirement to LED drive power.
The utility model, in order to overcome above-mentioned defect, has carried out useful improvement.
Utility model content
The purpose of this utility model is to solve above-mentioned deficiency of the prior art, provides a kind of New LED driving power.
To achieve these goals, the utility model is by the following technical solutions:
A kind of New LED driving power, comprise filter, DC/DC isolating converter, its special character is: described New LED driving power also comprises APFC power factor corrector, LLC resonant controller, described filter comprises EMI low pass filter, rectifier filter, described EMI low pass filter is connected with rectifier filter, the output of described rectifier filter is connected with the main circuit of APFC power factor corrector, described APFC power factor corrector also comprises APFC controller, described APFC controller controls the main circuit of employing peak value comparison method mode to APFC power factor corrector, the output of described APFC converter circuit connects DC/DC isolating converter, the output of described DC/DC isolating converter connects LED load, the working condition of described LED load feeds back to LLC resonant controller by constant current voltage limiting, the output of described LLC resonant controller connects DC/DC isolating converter and forms feedback loop,
Further, described LLC resonant controller adopts LLC half bridge resonant, described LLC half bridge resonant comprises input power, switching network, resonant network, transformer and full-wave rectifying circuit, wherein said resonant network is become with resonance inductive bank by electric capacity, described resonant network carries out frequency-selecting to the high frequency square wave voltage that APFC power factor corrector exports, and described full-wave rectifying circuit carries out rectification to the first-harmonic that resonant network exports;
Further, described full-wave rectifying circuit is made up of rectification circuit and filter circuit, and described rectification circuit is made up of diode D1 and diode D2 parallel connection, and described filter circuit comprises electric capacity C0;
Further, described transformer adopts the EI40 magnetic core of PC material, and the armature winding of described transformer is 18 circles, and two secondary winding are respectively 20 circles.
The beneficial effects of the utility model: the utility model adopts two-stage topologies, power factor corrector can complete the function of current following voltage, and rear class adopts LLC half bridge resonant, can ensure to obtain higher power density while high-power high-efficiency factor, LED drive power of the present utility model can be good at the quality and the effect that ensure LED illumination, for the large-scale application of LED lamp provides guarantee.
Accompanying drawing explanation
Fig. 1 is the circuit structure block diagram of the utility model embodiment.
Fig. 2 is the structure chart of the utility model embodiment LLC resonant converter.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is further described.
Embodiment of the present utility model is with reference to shown in figure 1, a kind of New LED driving power, comprise filter, DC/DC isolating converter, its special character is: described New LED driving power also comprises APFC power factor corrector, LLC resonant controller, described filter comprises EMI low pass filter, rectifier filter, described EMI low pass filter is connected with rectifier filter, the output of described rectifier filter is connected with the main circuit of APFC power factor corrector, described APFC power factor corrector also comprises APFC controller, described APFC controller controls the main circuit of employing peak value comparison method mode to APFC power factor corrector, the output of described APFC converter circuit connects DC/DC isolating converter, the output of described DC/DC isolating converter connects LED load, the working condition of described LED load feeds back to LLC resonant controller by constant current voltage limiting, the output of described LLC resonant controller connects DC/DC isolating converter and forms feedback loop, input voltage range 85VAC ~ the 65VAC of the present embodiment LED drive power, going out power is 200W, output voltage is 220V.At general illumination field, when meritorious input power is greater than 25W, meanwhile, integrated circuit structure adopts the stage type structure of APFC+DC/DC converter.
LLC resonant converter structure of the present utility model is as shown in Figure 2: in order to reduce size and the weight of LED drive power, improves DC converter power density and reliability, reduces switching noise, makes switching converter operation be a kind of strategy in Sofe Switch state.As the one topology in soft switch technique, controlled resonant converter obtains in high frequency switch power field and uses widely.LLC resonant converter has the features such as high power density, high operate frequency, high efficiency, low EMI, is a kind of very practical topological structure.The output voltage of prime APFC obtains high frequency square wave voltage through half-bridge, and the resonant network that electric capacity and resonant inductance are formed carries out frequency-selecting to it, and full-wave rectifying circuit carries out rectification to the first-harmonic that resonant network produces, thus is transferred to load.When nominal input voltage, converter is operated in load and works alone a little, and know prime output voltage Vbus=400V, the tube voltage drop Vf=1.2V of secondary rectifier diode, obtain output voltage Vo=220V, then transformer turns ratio is 0.9.
Resonant capacitance Cr plays resonance and every straight effect, the voltage stress that the Cr that capacitance is large bears is little, but loop current can be made comparatively large, and therefore should not get too large Cr, the utility model chooses the CBB electric capacity of 15nF/630V.
Wherein, the EI40 magnetic core of PC material selected by transformer, its Ae=148mm2, minimal switching frequency is 138kHz, and armature winding selects 18 circles, and two secondary winding select 20 circles.
The above execution mode only have expressed a kind of execution mode of the present utility model, but therefore can not be interpreted as the restriction to the utility model scope.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.
Claims (4)
1. a New LED driving power, comprise filter, DC/DC isolating converter, it is characterized in that: described New LED driving power also comprises APFC power factor corrector, LLC resonant controller, described filter comprises EMI low pass filter, rectifier filter, described EMI low pass filter is connected with rectifier filter, the output of described rectifier filter is connected with the main circuit of APFC power factor corrector, described APFC power factor corrector also comprises APFC controller, described APFC controller controls the main circuit of employing peak value comparison method mode to APFC power factor corrector, the output of described APFC converter circuit connects DC/DC isolating converter, the output of described DC/DC isolating converter connects LED load, the working condition of described LED load feeds back to LLC resonant controller by constant current voltage limiting, the output of described LLC resonant controller connects DC/DC isolating converter and forms feedback loop.
2. a kind of New LED driving power according to claim 1, it is characterized in that: described LLC resonant controller adopts LLC half bridge resonant, described LLC half bridge resonant comprises input power, switching network, resonant network, transformer and full-wave rectifying circuit, wherein said resonant network is become with resonance inductive bank by electric capacity, described resonant network carries out frequency-selecting to the high frequency square wave voltage that APFC power factor corrector exports, and described full-wave rectifying circuit carries out rectification to the first-harmonic that resonant network exports.
3. a kind of New LED driving power according to claim 2, it is characterized in that: described full-wave rectifying circuit is made up of rectification circuit and filter circuit, described rectification circuit is made up of diode D1 and diode D2 parallel connection, and described filter circuit comprises electric capacity C0.
4. a kind of New LED driving power according to Claims 2 or 3, is characterized in that: described transformer adopts the EI40 magnetic core of PC material, and the armature winding of described transformer is 18 circles, and two secondary winding are respectively 20 circles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520166492.1U CN204559941U (en) | 2015-03-24 | 2015-03-24 | A kind of New LED driving power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520166492.1U CN204559941U (en) | 2015-03-24 | 2015-03-24 | A kind of New LED driving power |
Publications (1)
| Publication Number | Publication Date |
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| CN204559941U true CN204559941U (en) | 2015-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520166492.1U Expired - Fee Related CN204559941U (en) | 2015-03-24 | 2015-03-24 | A kind of New LED driving power |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107395038A (en) * | 2017-08-16 | 2017-11-24 | 深圳市安健科技股份有限公司 | A kind of generator power circuit of more MOS wired in parallel |
| CN107454712A (en) * | 2017-07-27 | 2017-12-08 | 青岛海信电器股份有限公司 | Display device, lighting device and can simultaneously constant current and constant pressure output power circuit |
| CN107509280A (en) * | 2017-09-26 | 2017-12-22 | 东莞理工学院 | A kind of high-frequency isolation type LED drive circuit and its control method |
-
2015
- 2015-03-24 CN CN201520166492.1U patent/CN204559941U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107454712A (en) * | 2017-07-27 | 2017-12-08 | 青岛海信电器股份有限公司 | Display device, lighting device and can simultaneously constant current and constant pressure output power circuit |
| CN107454712B (en) * | 2017-07-27 | 2020-05-15 | 海信视像科技股份有限公司 | Display device, lighting device and power supply circuit capable of simultaneously outputting constant current and constant voltage |
| CN107395038A (en) * | 2017-08-16 | 2017-11-24 | 深圳市安健科技股份有限公司 | A kind of generator power circuit of more MOS wired in parallel |
| CN107395038B (en) * | 2017-08-16 | 2019-11-12 | 深圳市安健科技股份有限公司 | A kind of generator power circuit of more MOS wired in parallel |
| CN107509280A (en) * | 2017-09-26 | 2017-12-22 | 东莞理工学院 | A kind of high-frequency isolation type LED drive circuit and its control method |
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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: 20150812 Termination date: 20160324 |
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| CF01 | Termination of patent right due to non-payment of annual fee |