CN202206617U - Dimming constant-current driving power supply for LED illumination - Google Patents
Dimming constant-current driving power supply for LED illumination Download PDFInfo
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- CN202206617U CN202206617U CN2011203168133U CN201120316813U CN202206617U CN 202206617 U CN202206617 U CN 202206617U CN 2011203168133 U CN2011203168133 U CN 2011203168133U CN 201120316813 U CN201120316813 U CN 201120316813U CN 202206617 U CN202206617 U CN 202206617U
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Abstract
The utility model discloses a light-adjusting constant-current driving power supply for LED illumination, which comprises a power conversion main loop and a control loop; the power converter main loop comprises an alternating current input end, an EMI filter circuit, a full-bridge rectification circuit, a flyback DC/DC conversion circuit, a transformer, a direct current constant voltage output circuit, a secondary constant current drive circuit and a direct current constant current output end which are sequentially connected; the control loop comprises a dimming mode setting circuit, a phase conduction sampling circuit, a low-pass filtering decoding circuit, a PWM output circuit, an overcurrent protection circuit, a dimming holding circuit, a primary bias circuit, a power factor correction circuit, a constant voltage feedback circuit, a dimming control circuit and a PWM input circuit. The utility model has the characteristics of wide voltage input, high efficiency, high power density, protect function are complete and compatible phase dimming and PWM adjust luminance.
Description
Technical field
The utility model relates to a kind of LED driving power, relates in particular to a kind of light modulation constant-current driving power supply of the LED of being used for illumination.
Background technology
LED (Lighting Emitting Diode) is a light-emitting diode, is a kind of semiconductor solid luminescence device.It is to utilize the solid semiconductor chip as luminescent material, in semiconductor, through charge carrier compound energy of emitting surplus takes place and causes photo emissions, and is directly luminous.The LED illuminating product utilizes LED as the produced ligthing paraphernalia of light source exactly.LED be called as the 4th generation lighting source or green light source, have characteristics such as energy-saving and environmental protection, the life-span is long, volume is little, can be widely used in fields such as various indications, demonstration, decoration, backlight, general lighting and urban landscape.Led light source adopts DC driven, and the electric light power transfer is near 100% for super low-power consumption (0.03 watt-1 watt of single tube), and the equal illumination effect is more energy-conservation more than 80% than conventional light source.Led light source belongs to the solid cold light source, and epoxy encapsulation does not have loosening part yet in the lamp body, do not exist filament light-emitting to be prone to shortcomings such as burning, heat deposition, light decay, can reach 50,000 to 100,000 hours useful life, and is longer more than 10 times than the conventional light source life-span.Led light source belongs to typical green illumination light source.Do not have ultraviolet ray and infrared ray in the spectrum, heat is low and do not have stroboscopic, and is radiationless, and discarded object is recyclable, do not pollute not contain mercury element, and cold light source can safe touch.
At present LED all adopts DC driven, therefore between civil power and LED, need add a power supply adaptor, converts electric main the direct current of suitable LED to, and this power supply adaptor is exactly the LED driving power.The LED driving power is to convert the power supply supply into specific electric current and voltage with the luminous electric pressure converter of driving LED.Along with the application of LED is increasingly extensive; The performance of LED driving power will more and more be fit to the requirement of LED; The stability that the LED power supply shows, energy saving and life-span length possess important effect to the work of LED; And the utilization of LED light regulating technology not only can improve the luminous contrast of LED, can also reduce power consumption.
Because LED is a diode, can realize high-speed switch,, just can change its brightness, pulse-width modulation that Here it is (PWM) light modulation with the method that changes pulse duration therefore as long as make the driving power of LED into pulsed constant current supply.
The PWM light modulation of LED has colourless spectral migration, high light modulation precision, can combine with digital control technology and realizes light modulation on a large scale and advantages such as flicker free, and still, the main flow in light modulation market remains the silicon controlled phase dimming at present.This is because incandescent lamp commonly used and Halogen lamp LED etc. are pure resistance devices, does not require that input voltage must be sinusoidal wave, so can carry out light modulation through the mode that reverse-blocking tetrode thyristor cuts its effective value of sine wave change of input AC electricity.Therefore, if LED wants to replace the position through the incandescent lamp and the Halogen lamp LED light fixture of controllable silicon phase dimming, just be necessary with the controllable silicon phase dimming compatible.
Therefore, those skilled in the art is devoted to develop a kind of light modulation constant-current driving power supply of the LED of being used for illumination, is used for the driving of 10～100W LED lighting, can compatible phase dimming and PWM light modulation, comprise front end light modulation and rear end light modulation.The utility model also has wide voltage input, high efficiency, high power density, the complete characteristics of defencive function.
The utility model content
Because the above-mentioned defective of prior art, the utility model technical problem to be solved provide a kind of can compatible phase dimming and the PWM light modulation be used for the light modulation constant-current driving power supply that LED throws light on.
For realizing above-mentioned purpose, the utility model provides a kind of light modulation constant-current driving power supply of the LED of being used for illumination, comprises Power Conversion major loop and control loop; Said Power Conversion major loop comprises an ac input end that connects successively; To import the full bridge rectifier that industrial-frequency alternating current converts Rectified alternating current into for one; An anti-sharp DC/DC translation circuit that pulsating dc voltage is converted into high frequency pulse dc voltage; A transformer that transmits energy and changing voltage; One is the dc constant voltage output circuit of stable DC voltage with the high frequency pulse dc voltage transitions; A secondary constant-current drive circuit and a direct current constant current output that stable DC voltage is transferred to galvanic current stream; Said control loop comprises a light-modulating mode initialization circuit, a phase place conducting sample circuit, a LPF decoding circuit, a PWM output circuit, a circuit of power factor correction, a constant voltage feedback circuit, an adjusting control circuit and a PWM input circuit; The input of said light-modulating mode initialization circuit connects the output of said full bridge rectifier; The output of said full bridge rectifier, said phase place conducting sample circuit, said phase place conducting sample circuit are connected with the input of said PWM output circuit successively; The output of said PWM input circuit, said adjusting control circuit are connected with the input of said DC/DC secondary constant-current drive circuit successively, and said anti-input, said constant voltage feedback circuit, the said circuit of power factor correction that swashs the DC/DC translation circuit is connected with the output of said dc constant voltage output circuit successively.
Further, said Power Conversion major loop also comprises an EMI filter circuit, and the input of said EMI filter circuit connects the output of said ac input end, and the output of said EMI filter circuit connects the input of said full bridge rectifier.
Further, said control loop also comprises a current foldback circuit, and said current foldback circuit connects the said anti-output that swashs the DC/DC translation circuit.
Further, said control loop also comprises an elementary bias circuit, and said elementary bias circuit connects the said anti-output that swashs the DC/DC translation circuit.
Further, said control loop also comprises a light modulation holding circuit, and said light modulation holding circuit connects the said anti-output that swashs the DC/DC translation circuit.
Further, the output of said PWM output circuit is connected with the input of said PWM input circuit.
Further, the output of said PWM output circuit can also be connected with the input of other PWM dimmers in the external world.
Further, the input of said PWM input circuit can also be connected with the output of other light adjusting controllers in the external world.
Owing to used above technology; Compared with prior art; The light modulation constant-current driving power supply that is used for LED illumination of the utility model reads the light modulation information of the input AC electricity that passes through the controllable silicon phase dimming through phase place conducting sample circuit and LPF decoding circuit and is delivered to through PWM output circuit, PWM input circuit and adjusting control circuit the output of power supply; Realize the PWM light modulation of LED and the compatibility of controllable silicon phase dimming, comprise front end light modulation and rear end light modulation.The utility model also has wide voltage input, high efficiency, high power density, the complete characteristics of defencive function.
Below will combine accompanying drawing that the technique effect of design, concrete structure and the generation of the utility model is described further, with purpose, characteristic and the effect of understanding the utility model fully.
Description of drawings
Fig. 1 is that the module of the light modulation constant-current driving power supply that is used for LED illumination of the utility model of the utility model connects block diagram.
Fig. 2 is the industrial frequency AC electrical waveform through the input of extraneous light modulation.
Fig. 3 is the pulsating direct current electrical waveform of the frequency multiplication that rectification obtains through full-bridge circuit.
Fig. 4 is the dc constant voltage voltage V that obtains through anti-sharp DC/DC translation circuit.
Fig. 5 is the same frequency low pressure PWM waveform that the pulsating direct current electrical waveform obtains through phase place conducting sample circuit.
Fig. 6 is the PWM dim signal that arrives 500Hz through the frequency multiplication that the LPF decoding circuit obtains.
Fig. 7 is the size that adjusting control circuit is accepted PWM dim signal control output direct current continuous current I.
Embodiment
As shown in Figure 1, the light modulation constant-current driving power supply that is used for the LED illumination of the utility model comprises Power Conversion major loop 1 and control loop 2.
Power Conversion major loop 1 comprises an ac input end 11 that connects successively; To import the full bridge rectifier 13 that industrial-frequency alternating current converts Rectified alternating current into for one; An anti-sharp DC/DC translation circuit 14 that pulsating dc voltage is converted into high frequency pulse dc voltage; A transformer 15 that transmits energy and changing voltage; One is the dc constant voltage output circuit 16 of stable DC voltage with the high frequency pulse dc voltage transitions; A secondary constant-current drive circuit 17 and a direct current constant current output 18 that stable DC voltage is transferred to galvanic current stream;
The input of light-modulating mode initialization circuit 201 connects the output of full bridge rectifier 13; The output of full bridge rectifier 13, phase place conducting sample circuit 202, phase place conducting sample circuit 202 are connected with the input of PWM output circuit 210 successively; The output of PWM input circuit 211, adjusting control circuit 206 are connected with the input of secondary constant-current drive circuit 17 successively, and the input, constant voltage feedback circuit 209, the circuit of power factor correction 205 that instead swash DC/DC translation circuit 14 are connected with the output of dc constant voltage output circuit 16 successively.
Power Conversion major loop 1 also comprises an EMI filter circuit 12, and the input of EMI filter circuit 12 connects the output of ac input end 11, and the output of EMI filter circuit 12 connects the input of full bridge rectifier 13.
The output of PWM output circuit 210 is connected with the input of PWM input circuit 211.
The output of PWM output circuit 210 can also be connected with the input of extraneous other PWM dimmers.
The input of PWM input circuit 211 can also be connected with the output of extraneous other light adjusting controllers.
Below the work of the each several part of the light modulation constant-current driving power supply that is used for LED illumination of the utility model is described in detail.
As shown in Figure 2, by ac input end 11 inputs, dash area is represented by the voltage segment that is not transfused to of controllable silicon cutting among the figure through the industrial-frequency alternating current of extraneous controllable silicon phase dimming, and wherein a is the angle of flow (0≤a≤π) of phase dimming.
Anti-sharp DC/DC translation circuit 14 converts pulsating dc voltage into high frequency pulse dc voltage; As shown in Figure 4; Anti-swash DC/DC translation circuit 14 and convert the Rectified alternating current of full bridge rectifier 13 outputs to dc constant voltage through transformer 15, and through constant voltage feedback circuit 209 with voltage constant at a more stable dc constant voltage V.Wherein, transformer 15 transmits energy and changing voltage, and constant voltage feedback circuit 209 is the anti-DC/DC translation circuit 14 real-time feedback signals that swash, and from secondary feedback adjustment input power, realizes high-precision constant voltage output.
Light-modulating mode initialization circuit 201 is controllers of setting dimming scope, converts the Rectified alternating current of full bridge rectifier 13 outputs the low-voltage DC of benchmark 3V to, sets light-modulating mode through voltage ratio.
Phase place conducting sample circuit 202 is the current angles of flow of sampling and converts the circuit with the frequency low-voltage signal to that the Rectified alternating current that full bridge rectifier 13 is exported converts together low pressure pwm signal frequently to, and is as shown in Figure 5.
The PWM dim signal of LPF decoding circuit 207 outputs is transfused to entering PWM output circuit 210 from the input of PWM output circuit 210; The output of PWM output circuit 210 can be connected the part of light modulation as a whole with the input of PWM input circuit 211, also can be used as the signal input sources of other PWM dimmers.
The input of PWM input circuit 211 can be connected the part of light modulation as a whole with the output of PWM output circuit 210; Directly accept to come from the signal of PWM output circuit 210; Also can be used as the receiving device in other pwm signal sources, accept the dimming control signal of other controllers.
Adjusting control circuit 206 converts the PWM dim signal that PWM input circuit 211 receives into the constant current control signal, is the final control end of realizing light modulation.
Circuit of power factor correction 205 is control circuits of adjustment input current and voltage phase angle, is used to improve utilization rate of electrical.
Dc constant voltage output circuit 16 is a stable DC voltage with the high frequency pulse dc voltage transitions.Secondary constant-current drive circuit 17 transfers stable DC voltage to galvanic current stream.The dc constant voltage of dc constant voltage output circuit 16 outputs converts stable direct current constant current to through secondary constant-current drive circuit 17; And export the size of direct current constant current I by the PWM dim signal control that adjusting control circuit 206 receives; The size of control light fixture output light flux; Light modulation in 0～100% scope of realization, as shown in Figure 7.Direct current continuous current with through dc constant voltage output circuit 16 and 17 outputs of secondary constant-current drive circuit comes the driving LED lighting, can be so that the constant current accuracy that arrives be higher, and bright homogeneity and the life-span of LED all increase significantly.
Light modulation holding circuit 208 can be adjusted the electric current that flows into extraneous phase dimmer flexibly, to guarantee the output light flux vary stable of light fixture in whole 0～100% dimming scope, reduces because of being provided as the extra power consumption that holding current certainly leads to simultaneously.
Therefore; The light modulation constant-current driving power supply that is used for LED illumination of the utility model reads the light modulation information of the input AC electricity that passes through the controllable silicon phase dimming through phase place conducting sample circuit and LPF decoding circuit and is delivered to through PWM output circuit, PWM input circuit and adjusting control circuit the output of power supply; Realize the PWM light modulation of LED and the compatibility of controllable silicon phase dimming, comprise front end light modulation and rear end light modulation.The utility model is used for the driving of 10～100WLED lighting, also has wide voltage input, high efficiency, high power density, the complete characteristics of defencive function.
More than describe the preferred embodiment of the utility model in detail.Should be appreciated that those of ordinary skill in the art need not creative work and just can make many modifications and variation according to the design of the utility model.Therefore, the technical staff in all present technique field according to the design of the utility model on the basis of existing technology through the available technical scheme of logical analysis, reasoning, or a limited experiment, all should be in determined protection range by claims.
Claims (8)
1. a light modulation constant-current driving power supply that is used for the LED illumination is characterized in that: comprise Power Conversion major loop (1) and control loop (2);
Said Power Conversion major loop (1) comprises an ac input end (11) that connects successively; To import the full bridge rectifier (13) that industrial-frequency alternating current converts Rectified alternating current into for one; An anti-sharp DC/DC translation circuit (14) that pulsating dc voltage is converted into high frequency pulse dc voltage; A transformer (15) that transmits energy and changing voltage; One is the dc constant voltage output circuit (16) of stable DC voltage with the high frequency pulse dc voltage transitions; A secondary constant-current drive circuit (17) and a direct current constant current output (18) that stable DC voltage is transferred to galvanic current stream;
Said control loop (2) comprises a light-modulating mode initialization circuit (201), a phase place conducting sample circuit (202), a LPF decoding circuit (207), a PWM output circuit (210), a circuit of power factor correction (205), a constant voltage feedback circuit (209), an adjusting control circuit (206) and a PWM input circuit (211);
The input of said light-modulating mode initialization circuit (201) connects the output of said full bridge rectifier (13); The output of said full bridge rectifier (13), said phase place conducting sample circuit (202), said LPF decoding circuit (207) are connected with the input of said PWM output circuit (210) successively; The output of said PWM input circuit (211), said adjusting control circuit (206) are connected with the input of said secondary constant-current drive circuit (17) successively, and said anti-input, said constant voltage feedback circuit (209), the said circuit of power factor correction (205) that swashs DC/DC translation circuit (14) is connected with the output of said dc constant voltage output circuit (16) successively.
2. the light modulation constant-current driving power supply that is used for the LED illumination as claimed in claim 1; Wherein said Power Conversion major loop (1) also comprises an EMI filter circuit (12); The input of said EMI filter circuit (12) connects the output of said ac input end (11), and the output of said EMI filter circuit (12) connects the input of said full bridge rectifier (13).
3. the light modulation constant-current driving power supply that is used for the LED illumination as claimed in claim 1, wherein said control loop (2) also comprises a current foldback circuit (203), said current foldback circuit (203) connects the said anti-output that swashs DC/DC translation circuit (14).
4. the light modulation constant-current driving power supply that is used for the LED illumination as claimed in claim 1, wherein said control loop (2) also comprises an elementary bias circuit (204), said elementary bias circuit (204) connects the said anti-output that swashs DC/DC translation circuit (14).
5. the light modulation constant-current driving power supply that is used for the LED illumination as claimed in claim 1, wherein said control loop (2) also comprises a light modulation holding circuit (208), said light modulation holding circuit (208) connects the said anti-output that swashs DC/DC translation circuit (14).
6. like any one described light modulation constant-current driving power supply that is used for the LED illumination in the claim 1 to 5, the output of wherein said PWM output circuit (210) is connected with the input of said PWM input circuit (211).
7. like any one described light modulation constant-current driving power supply that is used for the LED illumination in the claim 1 to 5, the output of wherein said PWM output circuit (210) is connected with the input of other PWM dimmers in the external world.
8. like any one described light modulation constant-current driving power supply that is used for the LED illumination in the claim 1 to 5, the input of wherein said PWM input circuit (211) is connected with the output of other light adjusting controllers in the external world.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011203168133U CN202206617U (en) | 2011-08-26 | 2011-08-26 | Dimming constant-current driving power supply for LED illumination |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011203168133U CN202206617U (en) | 2011-08-26 | 2011-08-26 | Dimming constant-current driving power supply for LED illumination |
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| CN202206617U true CN202206617U (en) | 2012-04-25 |
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| CN2011203168133U Expired - Fee Related CN202206617U (en) | 2011-08-26 | 2011-08-26 | Dimming constant-current driving power supply for LED illumination |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103391669A (en) * | 2013-07-02 | 2013-11-13 | 深圳桑达百利电器有限公司 | LED (light emitting diode) lamp lighting system |
| CN103857148A (en) * | 2012-11-30 | 2014-06-11 | 硅工厂股份有限公司 | Power supply apparatus for LED lighting and LED lighting apparatus using the same |
| CN104470160A (en) * | 2015-01-06 | 2015-03-25 | 宁波江北华瑞电子有限公司 | Self-adaption efficient LED driving power supply |
| CN104994637A (en) * | 2015-06-29 | 2015-10-21 | 赛尔富电子有限公司 | LED light fixture power supply |
| CN106332402A (en) * | 2015-07-06 | 2017-01-11 | 通用电气照明解决方案有限公司 | LED dimming apparatus, LED lamp and LED illumination system |
| CN108337764A (en) * | 2017-01-19 | 2018-07-27 | 鸿科电子实业有限公司 | constant voltage output AC phase adjustable light L ED driver |
| CN108419338A (en) * | 2018-04-25 | 2018-08-17 | 深圳民爆光电技术有限公司 | A kind of four-in-one LED constant current dimming driving circuit |
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2011
- 2011-08-26 CN CN2011203168133U patent/CN202206617U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103857148A (en) * | 2012-11-30 | 2014-06-11 | 硅工厂股份有限公司 | Power supply apparatus for LED lighting and LED lighting apparatus using the same |
| CN103391669A (en) * | 2013-07-02 | 2013-11-13 | 深圳桑达百利电器有限公司 | LED (light emitting diode) lamp lighting system |
| CN104470160A (en) * | 2015-01-06 | 2015-03-25 | 宁波江北华瑞电子有限公司 | Self-adaption efficient LED driving power supply |
| CN104994637A (en) * | 2015-06-29 | 2015-10-21 | 赛尔富电子有限公司 | LED light fixture power supply |
| CN104994637B (en) * | 2015-06-29 | 2018-02-16 | 赛尔富电子有限公司 | A kind of LED lamp power supply |
| CN106332402A (en) * | 2015-07-06 | 2017-01-11 | 通用电气照明解决方案有限公司 | LED dimming apparatus, LED lamp and LED illumination system |
| CN106332402B (en) * | 2015-07-06 | 2019-05-10 | 通用电气照明解决方案有限公司 | A kind of LED dimming device, LED lamp and LED illumination System |
| CN108337764A (en) * | 2017-01-19 | 2018-07-27 | 鸿科电子实业有限公司 | constant voltage output AC phase adjustable light L ED driver |
| CN108337764B (en) * | 2017-01-19 | 2022-05-03 | 鸿科电子实业有限公司 | Constant Voltage Output AC Phase Dimmable LED Driver |
| CN108419338A (en) * | 2018-04-25 | 2018-08-17 | 深圳民爆光电技术有限公司 | A kind of four-in-one LED constant current dimming driving circuit |
| CN108419338B (en) * | 2018-04-25 | 2024-02-13 | 深圳民爆光电股份有限公司 | Four-in-one LED constant current dimming driving circuit |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120425 Termination date: 20190826 |