CN103096557A - Light-emitted diode (LED) driving power - Google Patents
Light-emitted diode (LED) driving power Download PDFInfo
- Publication number
- CN103096557A CN103096557A CN2011103357604A CN201110335760A CN103096557A CN 103096557 A CN103096557 A CN 103096557A CN 2011103357604 A CN2011103357604 A CN 2011103357604A CN 201110335760 A CN201110335760 A CN 201110335760A CN 103096557 A CN103096557 A CN 103096557A
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- Prior art keywords
- voltage
- compensating circuit
- circuit
- control loop
- driving power
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4266—Arrangements for improving power factor of AC input using passive elements
-
- 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
Abstract
The invention discloses a light-emitted diode (LED) driving power. The LED driving power comprises a power factor corrector circuit, an isolation transformer, a control loop compensating circuit, a photoelectric coupler and a power resource controller, wherein after the power factor corrector circuit conducts power factor correction to a direct voltage of a rectifying circuit, a high-voltage direct voltage is gained, the isolation transformer transforms the direct voltage from the power factor corrector circuit to a low-voltage direct voltage to supply the use of LED lamps and lanterns, the control loop compensating circuit conducts sampling and amplifying compensation deals to circuit signals and voltage signals output by the isolation transformer, the photoelectric coupler isolates the signals output by the control loop compensating circuit and then outputs the signals, and the power source controller modulates a circuit or a voltage to realize constant current control or constant voltage control of electrical signals output to the LED lamps and lanterns according to signals provided by the photoelectric coupler. After the LED driving power is provided to the LED lamps and lanterns, the phenomenon of dead lamps or blinking of the LED lamps and lanterns does not occur.
Description
Technical field
The present invention relates to lighting technical field, be specifically related to a kind of LED driving power.
Background technology
Fast development along with the LED illumination, enterprise has strengthened the research action aspect the LED illumination market one after another both at home and abroad, this is not only and comes from the powerful prospect that this industry shows, and also comes from government very large catalysis and impetus have been played in the support of this emerging green, ecological industry.On the one hand, conventional power source manufacturer releases the LED power supply product one after another, and on the other hand, the enterprise of numerous Starts also sets up one after another.The achievement in research of LED power supply emerges in an endless stream, and LED power supply market is rapid expanding also.But it is not yet ripe that the another one fact is power technology, and relevant criterion is not put into effect.Whole LED expands at a high speed the industrial market, and the LED power supply belongs to the conditional electronic industry technically, and the electron trade of China has possessed stronger manufacturing capacity.But how long industry does not rise, and price war is fired.But it is reported, now room lighting is very unstable with the LED power quality, has one or two use in the middle of ten and occurs the phenomenon of constantly glimmering after a period of time.
According to incompletely statistics, current LED light fixture product produces fault 80% left and right comes from power supply, improve constantly and the heat dissipation technology development from this several years LED light source product encapsulation technologies, the stability of light source has reached reasonable level, even said that is also light decay and look drift, this is mainly that the unreasonable of heat dissipation design caused.Directly downright bad situation is considerably less, and the problem of power supply wants much serious comparatively speaking, and one goes wrong is generally directly dead lamp or flicker, and the frequency ratio that occurs is higher.
In LED power supply enterprise; be devoted in the R ﹠ D Enterprises of small-power built-in power; luxuriant large, Ying Feite; the enterprise developments such as Lay Ford are quite rapid; but the LED built-in power fault of wherein producing is also more; capture low frequency Flickering Phenomenon (it is reported without stroboscopic power supply each company all in research and development) with the photograph function, other protections are all complete, but all lack temperature protection function.
Summary of the invention
The purpose of this invention is to provide a kind of LED driving power, power supply of the present invention can not cause the LED light fixture dead lamp or scintillation to occur when luminous after supplying with the use of LED light fixture.
The technical scheme that realizes above-mentioned purpose is as follows:
A kind of LED driving power comprises: rectification circuit is converted to direct voltage output with the AC power of inputting; And
Power factor correction circuit carries out obtaining after Active PFC the direct voltage of high pressure to the direct voltage that comes from rectification circuit; And
Isolating transformer, the dc voltage conversion that will come from power factor correction circuit is the direct voltage of low pressure, uses to supply with the LED light fixture; And
The control loop compensating circuit, current signal and the voltage signal that will come from isolating transformer output are sampled and do the amplification compensation deals; And
Photoelectrical coupler transmits after the signal isolation with the output of control loop compensating circuit; And
Power-supply controller of electric according to the signal that photoelectrical coupler provides, is modulated curtage, and the constant current or the constant voltage that output to the signal of telecommunication of LED light fixture with realization are controlled.
Adopted such scheme, the advantage of this applicable novel invention is: have higher PFC, make the energy obtain purification.Avoided (about 100HZ) ripple (this ripple naked eyes can not be differentiated, but can allow for a long time people's visual fatigue) of low frequency.Effect by power factor correction circuit and permanent control loop compensating circuit, make output do not have the low-frequency ripple current precision reach ± 1%, avoided the LED light fixture that low frequency flicker (mobile phone, the visible low frequency flicker of camera) is arranged, the light flicker free that light fixture is sent has been eliminated visual fatigue to greatest extent.Small product size is little, and width is less than 17mm, and height is fit to be installed in the T8 fluorescent tube less than 11mm, and the transformer framework of this product is special die sinking.Have temperature protection function, can collect the temperature of power supply, when temperature surpasses 110 °, power protection, autoshutdown prevents that fault from enlarging, and recovers automatically after Failure elimination.
LED driving power of the present invention adopts the buffer circuit design, and efficient is high simultaneously, and good reliability is fit to be installed in airtight environment, and through test, its fraction defective has been verified the perfection of design less than one thousandth.
Figure of description
Fig. 1 is the circuit theory diagrams of LED driving power of the present invention;
Embodiment
With reference to Fig. 1, LED driving power of the present invention, it is comprised of EMI circuit 10, rectification circuit D1, power factor correction circuit 20, isolating transformer 30, control loop compensating circuit 40, photoelectrical coupler U1, power-supply controller of electric 50, and the below is elaborated to each several part:
EMI circuit 10 is used for the clutter of the alternating current of electrical network input is filtered, and eliminates simultaneously this power supply to the interference of electrical network.
Rectification circuit D1 is converted to direct voltage output with the AC power of input, and rectification circuit D1 is the bridge rectifier chip.
Power factor correction circuit 20 is the direct voltage that comes from rectification circuit to be carried out obtaining after Active PFC the direct voltage of high pressure, and power factor correction circuit 20 of the present invention is to adopt valley fill type Passive Power factor correction circuit.
The direct voltage that isolating transformer 30 will come from power factor correction circuit transfers to the direct voltage of low pressure in the magnetic circuit mode, use to supply with the LED light fixture.In the present invention, the signal of telecommunication with isolating transformer 30 outputs is defined as LED+.The winding of the transformer of this power supply is as follows: from Pin10 to the Pin3--------27 circle, Φ 0.28x27Tx1, (three layers) add three layers, isolation adhesive tape; From Pin6 to the Pin5--------8 circle, Φ 0.25x8Tx2 adds three layers, isolation adhesive tape; From Pin5 to the Pin4--------8 circle, Φ 0.25x8Tx2 adds three layers, adhesive tape of isolation from Pin2 to the Pin1--------27 circle, Φ 0.28x27Tx1, and (three layers) add three layers, isolation adhesive tape.
Control loop compensating circuit 40 will come from current signal and the voltage signal of isolating transformer output and samples and do the amplification compensation deals.The control loop compensating circuit comprises: constant voltage control loop compensating circuit, constant current control loop compensating circuit, and the reference voltage source that the benchmark comparative voltage is provided for constant voltage control loop compensating circuit, constant current control loop compensating circuit.Constant voltage control loop compensating circuit comprises the first comparator U2A, the first voltage sample resistance R 9, second voltage sampling resistor R10, and voltage transfering function compensating circuit.The first voltage sample resistance R 9 and the series connection of second voltage sampling R10 resistance, the idle termination of the first voltage sample resistance R 9 is received the signal of telecommunication LED+ of isolating transformer 30 outputs, the other end ground connection of second voltage sampling resistor R10.The inverting input of the first comparator U2A is connected in the node place between the first voltage sample resistance and second voltage sampling resistor, and the in-phase input end of the first comparator is connected with reference voltage source.The voltage transfering function compensating circuit is connected between the inverting input of the output of the first comparator U2A and the first comparator.Described voltage transfering function compensating circuit is comprised of the 7th resistance R 7 and the 9th capacitor C 9 of connecting with the 7th resistance.Constant current control loop compensating circuit comprises the second comparator U2AB, current sampling resistor R13 and current transfer function compensating circuit, the inverting input of the second comparator U2AB connects current sampling resistor R13, also is provided with resistance R 12 between the inverting input of the second comparator U2AB and current sampling resistor R13.The in-phase input end of the second comparator is connected with reference voltage source.The current transfer function compensating circuit is connected between the inverting input of the output of the second comparator and the second comparator.The current transfer function compensating circuit is comprised of the 11 resistance R 11 and the 11 capacitor C 11 of connecting with the 11 resistance.Reference voltage source is three terminal regulator TL431.
Transmit after the signal isolation of photoelectrical coupler U1 with the output of control loop compensating circuit.Photoelectrical coupler U1 is the photoelectrical coupler of PCB817 type.
Power-supply controller of electric 50 is modulated curtage according to the signal that photoelectrical coupler provides, and the constant current or the constant voltage that output to the signal of telecommunication of LED light fixture with realization are controlled, and the output of power-supply controller of electric 50 is connected in the input of isolating transformer 30.Power-supply controller of electric comprises by power supply control chip U3 and compensating circuit and forming, and wherein power supply control chip is TINY179.Compensating circuit is comprised of the 5th resistance R 5 and the 7th capacitor C 7, and an end of the 5th resistance R 5 is connected with the first pin of power supply control chip, and the other end is connected with an end of the 7th capacitor C 7, and the other end of the 7th capacitor C 7 is connected with the 8th pin of power supply control chip.In the TINY179 application of the present invention to power supply control chip; compensating circuit with resistance R 5, capacitor C 7 compositions; solved the stability problem of the batch production of circuit; from but this chip can be widely used in the built-in daylight lamp power source of LED isolation; power supply control chip carries temperature and controls; when temperature surpasses 130 when spending, circuit cuts off automatically, Duos a Temperature Failure protected mode than other power supplys.
The below describes work of the present invention:
, carry out noise and filter coming from the AC power of electrical network by the EMI circuit, eliminate simultaneously this power supply to the interference of electrical network.After the EMI processing of circuit, carry out rectification by rectification circuit D1, after alternating current is become direct current, after carrying out the correction of power factor (PF) by power factor correction circuit 20, produce the direct voltage of a high pressure, be coupled to output by isolating transformer 30 again, become the direct current of the LED fluorescent lamp use of low pressure.The signal of telecommunication LED+ of isolating transformer 30 outputs, carry out current sample by current sampling resistor R13, this current signal is passed to the inverting input of the second comparator U2B through resistance R 12, due to the 11 resistance R 11 and the 11 capacitor C 11 voltage transfering function compensating circuits to carry out network building out, act on photoelectrical coupler U1 through diode D9, photoelectrical coupler U1 is again being delivered to power supply control chip U3 after the signal isolation, the PWM that is carried out at last electric current by power supply control chip U3 controls, complete the closed-loop control to electric current, reach the constant current effect.Simultaneously, after by the first voltage sample resistance R 9 and second voltage sampling resistor R10, the signal of telecommunication of isolating transformer 30 outputs being carried out the dividing potential drop sampling, be transferred to the inverting input of the first comparator U2A, form the voltage transfering function compensating circuit by the 7th resistance R 7 and the 9th capacitor C 9 and carry out network building out, signal is outputed to diode D8, control photoelectrical coupler U1 with current parallel, photoelectrical coupler U1 is again being delivered to power supply control chip U3 after the signal isolation, the closed loop PWM that completes voltage controls, and reaches the constant voltage effect.
Claims (10)
1. a LED driving power, is characterized in that, comprising: rectification circuit is converted to direct voltage output with the AC power of inputting; And
Power factor correction circuit carries out obtaining after Active PFC the direct voltage of high pressure to the direct voltage that comes from rectification circuit; And
Isolating transformer, the dc voltage conversion that will come from power factor correction circuit is the direct voltage of low pressure, uses to supply with the LED light fixture; And
The control loop compensating circuit, current signal and the voltage signal that will come from isolating transformer output are sampled and do the amplification compensation deals; And
Photoelectrical coupler transmits after the signal isolation with the output of control loop compensating circuit; And
Power-supply controller of electric according to the signal that photoelectrical coupler provides, is modulated curtage, and the constant current or the constant voltage that output to the signal of telecommunication of LED light fixture with realization are controlled.
2. a kind of LED driving power according to claim 1, is characterized in that, also comprises the EMI circuit, and the clutter of electrical network is filtered, and eliminates simultaneously this power supply to the interference of electrical network.
3. a kind of LED driving power according to claim 1 and 2, it is characterized in that, described control loop compensating circuit comprises: constant voltage control loop compensating circuit, constant current control loop compensating circuit, and the reference voltage source that the benchmark comparative voltage is provided for constant voltage control loop compensating circuit, constant current control loop compensating circuit.
4. a kind of LED driving power according to claim 3, it is characterized in that, described constant voltage control loop compensating circuit comprises the first comparator, the first voltage sample resistance, the second voltage sampling resistor, and voltage transfering function compensating circuit, the first voltage sample resistance and the series connection of second voltage sampling resistor, the inverting input of the first comparator is connected in the node place between the first voltage sample resistance and second voltage sampling resistor, the in-phase input end of the first comparator is connected with reference voltage source, the voltage transfering function compensating circuit is connected between the inverting input of the output of the first comparator and the first comparator.
5. a kind of LED driving power according to claim 4, is characterized in that, described voltage transfering function compensating circuit is comprised of the 7th resistance (R7) and the 9th electric capacity (C9) of connecting with the 7th resistance.
6. a kind of LED driving power according to claim 3, it is characterized in that, described constant current control loop compensating circuit comprises the second comparator, current sampling resistor and current transfer function compensating circuit, the inverting input of the second comparator connects current sampling resistor, the in-phase input end of the second comparator is connected with reference voltage source, and the current transfer function compensating circuit is connected between the inverting input of the output of the second comparator and the second comparator.
7. a kind of LED driving power according to claim 6, is characterized in that, described current transfer function compensating circuit is comprised of the 11 resistance (R11) and the 11 electric capacity (C11) of connecting with the 11 resistance.
8. a kind of LED driving power according to claim 3, is characterized in that, described reference voltage source is three terminal regulator.
9. a kind of LED driving power according to claim 1, it is characterized in that, power-supply controller of electric comprises by power supply control chip and compensating circuit and forming, described compensating circuit is comprised of the 5th resistance (R5) and the 7th electric capacity (C7), one end of the 5th resistance (R5) is connected with the first pin of power supply control chip, the other end is connected with an end of the 7th electric capacity (C7), and the other end of the 7th electric capacity (C7) is connected with the 8th pin of power supply control chip.
10. a kind of LED driving power according to claim 9, is characterized in that, power supply control chip is TINY179.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011103357604A CN103096557A (en) | 2011-10-29 | 2011-10-29 | Light-emitted diode (LED) driving power |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103357604A CN103096557A (en) | 2011-10-29 | 2011-10-29 | Light-emitted diode (LED) driving power |
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| CN103096557A true CN103096557A (en) | 2013-05-08 |
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| CN2011103357604A Pending CN103096557A (en) | 2011-10-29 | 2011-10-29 | Light-emitted diode (LED) driving power |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103442477A (en) * | 2013-06-25 | 2013-12-11 | 大连阿尔法模拟技术股份有限公司 | High-efficiency LED driver circuit |
| CN103813595A (en) * | 2014-02-24 | 2014-05-21 | 南京创维平面显示科技有限公司 | Efficient power source capable of supplying electricity in constant voltage and constant current alternation mode |
| CN104486870A (en) * | 2014-11-25 | 2015-04-01 | 深圳市润杰明成照明科技有限公司 | Driving circuit and driving device of non-flicker LED (light emitting diode) lamp |
| CN104780665A (en) * | 2015-03-30 | 2015-07-15 | 成都颉隆科技有限公司 | Compensation type frequency-converting and energy-saving control system for smart grid |
| CN105156917A (en) * | 2015-03-09 | 2015-12-16 | 龙腾照明集团有限公司 | LED illuminating system with space optical communication function |
| CN105282896A (en) * | 2014-05-27 | 2016-01-27 | 宁波高新区赛尔富电子有限公司 | Power supply control circuit of LED lamp |
| CN105934017A (en) * | 2016-03-17 | 2016-09-07 | 上海遍发电子科技有限公司 | Switching power supply feedback control circuit and single-stage PFC efficient constant current power supply drive circuit |
| CN106685213A (en) * | 2017-01-13 | 2017-05-17 | 成都中科慧源科技有限公司 | Anti-high voltage interference circuit |
| CN106954307A (en) * | 2017-04-10 | 2017-07-14 | 深圳天源中芯半导体有限公司 | A kind of PWM light adjusting circuits for High Power Factor primary side feedback LED drive power |
| CN114828028A (en) * | 2022-03-10 | 2022-07-29 | 华南理工大学 | Energy recycling system for 5G indoor coverage |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103442477A (en) * | 2013-06-25 | 2013-12-11 | 大连阿尔法模拟技术股份有限公司 | High-efficiency LED driver circuit |
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| CN104780665A (en) * | 2015-03-30 | 2015-07-15 | 成都颉隆科技有限公司 | Compensation type frequency-converting and energy-saving control system for smart grid |
| CN105934017A (en) * | 2016-03-17 | 2016-09-07 | 上海遍发电子科技有限公司 | Switching power supply feedback control circuit and single-stage PFC efficient constant current power supply drive circuit |
| CN105934017B (en) * | 2016-03-17 | 2018-11-20 | 上海遍发电子科技有限公司 | A kind of Switching Power Supply feedback control circuit and single- stage PFC high-efficiency constant-flow power driving circuit |
| CN106685213A (en) * | 2017-01-13 | 2017-05-17 | 成都中科慧源科技有限公司 | Anti-high voltage interference circuit |
| CN106954307A (en) * | 2017-04-10 | 2017-07-14 | 深圳天源中芯半导体有限公司 | A kind of PWM light adjusting circuits for High Power Factor primary side feedback LED drive power |
| CN106954307B (en) * | 2017-04-10 | 2018-06-08 | 深圳天源中芯半导体有限公司 | A kind of PWM light adjusting circuits for High Power Factor primary side feedback LED drive power |
| CN114828028A (en) * | 2022-03-10 | 2022-07-29 | 华南理工大学 | Energy recycling system for 5G indoor coverage |
| CN114828028B (en) * | 2022-03-10 | 2023-06-20 | 华南理工大学 | Energy recycling system for 5G indoor coverage |
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Application publication date: 20130508 |