CN202050568U - Light-emitting diode (LED) TRIAC dimming control system - Google Patents

Light-emitting diode (LED) TRIAC dimming control system Download PDF

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Publication number
CN202050568U
CN202050568U CN2011200904281U CN201120090428U CN202050568U CN 202050568 U CN202050568 U CN 202050568U CN 2011200904281 U CN2011200904281 U CN 2011200904281U CN 201120090428 U CN201120090428 U CN 201120090428U CN 202050568 U CN202050568 U CN 202050568U
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China
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module
led
control system
circuit module
light
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CN2011200904281U
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Chinese (zh)
Inventor
孙建国
周鸣
王永庆
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南京汉德森科技股份有限公司
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Publication of CN202050568U publication Critical patent/CN202050568U/en

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Abstract

The utility model discloses a light-emitting diode (LED) TRIAC dimming control system, which mainly comprises a TRIAC dimmer, a bridge rectifier, a voltage detection device, a follow current circuit module, a step-down conversion adjustment module, a current detection module, a second filter circuit module and a load. The voltage detection device, the follow current circuit module, the current detection module and the step-down conversion adjustment module are jointly connected with a dimming controller. A first filter circuit module is connected between the bridge rectifier and the step-down conversion adjustment module. A power supply circuit module is connected between the voltage detection device and a dimming control chip through one two-way diode. The TRIAC dimmer is serially connected with the input end of an alternating-current (AC) line, the current of an LED can be controlled through the output of the dimming controller to realize brightness adjustment and control. The system can be controlled through a remote control mode, a manual control mode and the like, is very convenient to install, run, maintain and inspect and can be widely used for local illumination control in families and public places such as shopping malls and art centers.

Description

LED controllable silicon light modulation control system

Technical field

The present invention relates to a kind of light adjusting controller, relate in particular to, belong to semiconductor lighting control technology field with high-power, high brightness LED LED controllable silicon light modulation control system as lighting source.

Background technology

LED luminous efficiency height, power consumption is few, the life-span is long, security reliability is high and be suitable for control and features such as light modulation, makes LED be applied in the growth that is the blowout formula after the 2008 Olympic Games.In the widely used while of LED, the LED driving power then is the guarantee that the industrialization of LED light fixture is grown up, and the quality of LED power supply has directly restricted LED light fixture reliability of products, so the maturation of LED driving power is also quite important.The LED parts approach harshness for the requirement of driving power, LED does not resemble common incandescent lamp bulb, the alternating current that can directly connect 220V, need low voltage drive, must carry out power converting circuit, because most LED type of drive has constant current mode and constant pressure type in the market, these two kinds of methods have its pluses and minuses separately: the electric current of constant-current driving output is constant, good uniformity, but the direct voltage of output but changes within the specific limits, and the electric current of constant voltage driving output changes along with the increase and decrease of load, and uniformity is not high; And light-dimming method commonly used in the market has multiple: pulse width modulation (PWM) light-dimming method, this brightness adjustment control method are to utilize the pulse duty factor of regulating power switch in the high-frequency inverter, thereby realize the adjusting of lamp power output.Change half-bridge inverter supply power voltage light modulation method,, thereby change the effect that power output reaches light modulation by the supply power voltage of change half-bridge inverter.Pulse-frequency modulation light modulation method, if the switch operating frequency of high-frequency ac electric ballast increases, then the impedance of ballast inductance increases, and the electric current that flows through the ballast inductance like this will descend, and the electric current that causes flowing through lamp load descends, thereby realizes light modulation.Pulse-phase modulation light modulation method is utilized the method for regulating the conducting phase place of two power switch pipes in the half-bridge inverter to regulate power output, thereby is reached the purpose of light modulation.Controllable silicon phase-controlled dimming method, using silicon controlled phased operation principle, by the control silicon controlled angle of flow, the sine voltage that electrical network is imported cuts away a part, to reduce average value of output voltage, reaches control circuit for lamp supply power voltage, thereby realizes light modulation.The controllable silicon phase-controlled dimming is fast to the voltage-regulation speed of illuminator, light modulation precision height, the light modulation parameter can be adjusted at times in real time, but in the actual application, the difficult point of controllable silicon light modulation has: for example angle of flow detection is inaccurate, light modulation is quick inadequately and stable, low pressure can't start, problems such as power factor is low, power factor instability.In addition, add protection circuit, cause the power circuit of LED very huge, the element cost all will raise, and at present the cost of LED itself is just high, the cost of power supply in addition, and this just defines the market competitiveness of LED product widely, the practicality of LED product light modulation scheme decreases, and this also is its problem of growing up and popularizing of restriction.

Summary of the invention

The objective of the invention is to overcome the above problem that prior art exists, a kind of LED controllable silicon light modulation control system is proposed, adopt software and hardware to carry out the detection of the angle of flow for the method for closing, solve and accurately detect the angle of flow, make input and the corresponding problem of output, reach light modulation rapidity, accuracy and stability; In lighting energy saving control, can guarantee the uniformity of illuminating effect, the useful life of prolongation light fixture preferably.

Above-mentioned purpose of the present utility model will be achieved by the following technical programs:

LED controllable silicon light modulation control system, its LED drive part mainly comprises the TRIAC dimmer, bridge rectifier, voltage check device, freewheeling circuit module, buck conversion adjusting module, current detection module, second filter circuit module and the load, voltage check device, freewheeling circuit module, current detection module and buck conversion adjusting module insert light adjusting controller in the lump, it is characterized in that: be connected the first filter circuit module between described bridge rectifier and buck conversion adjusting module; Described voltage check device and brightness adjustment control chip chamber are connected with the power supply circuits module by a bilateral diode; And described TRIAC dimmer is serially connected in the AC line input, the current controlled light adjusting controller that is modulated between itself and load.

Further, described light adjusting controller has TRIAC angle of flow testing circuit, brightness adjustment control processor chips, PWM controller three parts, wherein said TRIAC angle of flow testing circuit is associated with the pin (10) of light adjusting controller, in order to monitor and definite silicon controlled conducting or off state.

Further, described voltage check device is served as reasons and is positioned at bridge rectifier resistance R 3, Zener diode Z1 and power switch pipe Q1 composition afterwards, is used for the line voltage distribution after the rectification is converted to the pin (10) of level input light adjusting controller.

Further, described buck conversion adjusting module is formed the switching mode buck converter by power switch pipe Q3, inductor L1, resistance R 8 and capacitor C 7, and in order to drive load, described load is the LED luminous tube.

Further, described light adjusting controller has the pin towards external input device, comprises that the external input device of button and infrared receiver is connected on those pins of light adjusting controller.

The application implementation of the utility model dimming control system, its outstanding effect shows as:

1. powerful, have wide range of applications.Can realize the adjusting of LED lamp brightness, and be furnished with by modes such as key control, infra-red remote controls and operate, be fit to different intelligent lighting places.

2. at various controlled place requirement, adopt constant current soaking, the weak excitation of constant current and phase lag exciting technique, solved the stable operation problem of LED power supply in omnidistance 0-100% dimming scope, the problem of promptly not glimmering.

3. support the multicore sheet solution of master/slave controlled function, use a TRIAC dimmer and a main hollow sheet, just can control a plurality of multi-string LEDs that drive based on the subordinate buck converter of main control chip; Control mode is convenient, flexibly, be easy to revise, operation and safeguarding.

4. prolong the life-span of light source, not only can save substantial contribution, and can significantly reduce the workload of changing light fixture, reduced the operating cost of illuminator.

5. good energy-saving effect accurately is provided with and reasonable management the illuminance of different time varying environment, realizes energy-conservationly, and power savings is fairly obvious, reaches more than 30%.

6. provide that VCC owes to lock, the heat of thresholding is closed protection and the electric current restriction.

7. adopt the isolation technology design, compatible good, stability and reliability height satisfy various safety standard-requireds.

Description of drawings

Fig. 1 is the theory diagram of the utility model dimming control system;

Fig. 2 is the enforcement circuit diagram of the utility model dimming control system.

Embodiment

Following constipation closes the embodiment accompanying drawing, embodiment of the present utility model is described in further detail, so that technical solutions of the utility model are easier to understand, grasp.

As shown in Figure 1, the controllable silicon light modulation LED power supply product that this technical scheme is released has been taked multiple technological means, and this system led drive circuit mainly comprises as the lower part, be TRIAC dimmer 1, bridge rectifier 2, voltage check device 3, the first filter circuit module 4, freewheeling circuit module 5, buck conversion adjusting module 6, power supply circuits module 7, current detection module 8, the second filter circuit modules 9, light adjusting controller 10 and load 11.Wherein, between bridge rectifier 2 and buck conversion adjusting module 6, one first filter circuit module 4 is set, power supply circuits 7 are set between voltage check device 3 and brightness adjustment control chip circuit 10, power supply circuits 7 connect by a bilateral diode, the TRIAC dimmer is serially connected in the AC line input, by the brightness adjustment control chip circuit, can control the electric current of LED string, realize brightness control, this system can carry out pattern control by modes such as remote control, manual controls.

Further, as shown in Figure 2, this voltage check device 3 is served as reasons and is positioned at bridge rectifier 2 resistance R 3, Zener diode Z1 and a series connection of power switch pipe Q1 composition detection path afterwards, the line voltage distribution of rectification is converted to pin (10) detection of a suitable level modulated light control chip.Because power switch pipe Q1 source electrode do not connect capacitor, reduce to 15V when following when line voltage distribution, allow voltage on the brightness adjustment control chip pin (10) to raise and reduce with commutating voltage.The effect of resistance R 4 has: the one, as the electric charge of brightness adjustment control chip pin (10) the node parasitic capacitance of releasing; The 2nd, when in little electric current output, operating, for dimmer provides needed holding current.The effect of diode (Schottky type) D3 and capacitor C 3, C4 is: when the voltage step-down on the brightness adjustment control chip pin (10), keep the voltage on the brightness adjustment control chip pin (9), make the brightness adjustment control chip can normal running.

Further, its core of LED controllable silicon light modulation control system is a light adjusting controller 10, it is made up of TRIAC angle of flow testing circuit, light adjusting controller chip, PWM controller three parts, its main feature is to have designed TRIAC brightness adjustment control chip circuit on chip, and TRIAC angle of flow testing circuit utilizes comparator detection brightness adjustment control chip pin (a 10) signal to determine that controllable silicon is conducting or shutoff.Brightness adjustment control chip pin (a 1) comparator leadage circuit signal of output also drives a buffer, filter filtering through brightness adjustment control chip internal composition, being input to the slope comparator by brightness adjustment control chip pin (2) compares with it, slope comparator output signal to a N-channel MOS FET, second filter filtering that the electric capacity of signal in the MOSFET drain electrode on internal resistance and brightness adjustment control chip pin (5) is formed, transport to inner PWM controller, the direct voltage that the output of brightness adjustment control chip changes, corresponding dimmer duty ratio from 25% to 75% changes, the thyristor operating angle scope also changes from 45 ℃ to 135 ℃ thereupon, thereby directly control the peak current of LED, almost can in from 0% to 100% dimming scope, realize flicker free LED brightness control, the error of the angle of flow can reach in 0.5%, improves pwm signal renewal speed and precision.

Wherein, power factor relates in the important indicator of power-efficient and power quality, perfect power factor is 1.0, have only synchronous LED light modulation to drive sinusoidal current, and it is zero that harmonic filtration is fallen, could arrive 1.0 merit because of, and actual product can not be accomplished ideal value, but can be worth near this.Therefore, between bridge rectifier and buck conversion adjusting module, one first filter circuit module is set, capacitor C 1 and resistance R 1, R2 form a filter circuit, substitute the big capacity filtering capacitor of tradition with it, can improve the line power factor, passive pfc circuit output voltage is as the DC bus voltage of buck converter.

In the described LED controllable silicon light modulation controller, also comprise a DC decompression converter circuit 6, form the switching mode buck converter, be used for the driving LED luminous tube by power switch pipe Q3, inductor L1, resistance R 8 and capacitor C 7.When the pwm signal driving power switching tube Q2 conducting on the pin 8 of light adjusting controller, by linear the increasing of electric current of L1 and LED string, and by the current detection circuit sensing of R6, R7, power switch pipe Q3 composition; When the voltage on the R6 equaled reference voltage on IC pin 5, power switch pipe Q2 then turn-offed, and L1 discharges energy storage, the D2 conducting, and electric current is by LED string and L1, and reduces from its peak value linearity, and inductor L2, diode D2 form a freewheeling circuit.C7 is as the ripple current of eliminating most of inductance L 1, and the turn-off time provides a linear current ramp signal in order to be provided with fixedly for R8, C8 and power switch pipe Q3.

Again further, LED controllable silicon light modulation circuit has been set up infrared, wireless remote control, in any room, control the on off state and the dimming state of all networking light fixtures (no matter whether light fixture is in this room) with the infrared hand-held remote control device, do not turn on light again after not needing to enter the room, before entering arbitrary room, just can open light, again need not seek the switch of lamp in the dark with remote controller.

LED controllable silicon light modulation controller is a light modulation technical ability of new generation, and can use original switch on wall, does not need the transformation of from the beginning connecting up, and does not also need extra hardware measure.Because it is little that controllable silicon phased (copped wave method) light modulation has a volume, equipment quality is light, the advantage of reasonable price and light modulation power control range is so controllable silicon phase-controlled dimming method is present the most widely used light-dimming method, as the light of occasions such as specialized hospital, schoolhouse, train and bus stop.

Certainly, more than only be concrete exemplary applications of the present invention, protection scope of the present invention is not constituted any limitation.All employing equivalents or equivalence are replaced and the technical scheme of formation, all drop within the rights protection scope of the present invention.

Claims (5)

1.LED controllable silicon light modulation control system, its LED drive part mainly comprises the TRIAC dimmer, bridge rectifier, voltage check device, freewheeling circuit module, buck conversion adjusting module, current detection module, second filter circuit module and the load, voltage check device, freewheeling circuit module, current detection module and buck conversion adjusting module insert light adjusting controller in the lump, it is characterized in that: be connected the first filter circuit module between described bridge rectifier and buck conversion adjusting module; Described voltage check device and brightness adjustment control chip chamber are connected with the power supply circuits module by a bilateral diode; And described TRIAC dimmer is serially connected in the AC line input, the current controlled light adjusting controller that is modulated between itself and load.
2. LED controllable silicon light modulation control system according to claim 1, it is characterized in that: described light adjusting controller has TRIAC angle of flow testing circuit, brightness adjustment control processor chips, PWM controller three parts, wherein said TRIAC angle of flow testing circuit is associated with the pin 10 of light adjusting controller, in order to monitor and definite silicon controlled conducting or off state.
3. LED controllable silicon light modulation control system according to claim 1, it is characterized in that: described voltage check device is served as reasons and is positioned at bridge rectifier resistance R 3, Zener diode Z1 and power switch pipe Q1 composition afterwards, is used for the line voltage distribution after the rectification is converted to the pin 10 of level input light adjusting controller.
4. LED controllable silicon light modulation control system according to claim 1, it is characterized in that: described buck conversion adjusting module is formed the switching mode buck converter by power switch pipe Q3, inductor L1, resistance R 8 and capacitor C 7, in order to drive load, described load is the LED luminous tube.
5. LED controllable silicon light modulation control system according to claim 1, it is characterized in that: described light adjusting controller has the pin towards external input device, comprises that the external input device of button and infrared receiver is connected on those pins of light adjusting controller.
CN2011200904281U 2011-03-31 2011-03-31 Light-emitting diode (LED) TRIAC dimming control system CN202050568U (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103517490A (en) * 2012-06-15 2014-01-15 欧司朗股份有限公司 A driver, a luminescence device and a method for controlling the driver
CN103582217A (en) * 2012-07-31 2014-02-12 西安展芯微电子技术有限公司 LED drive circuit with controllable current ripples
CN103582218A (en) * 2012-07-31 2014-02-12 西安展芯微电子技术有限公司 LED drive circuit having index-correction and dimming functions
CN103687242A (en) * 2013-12-17 2014-03-26 魏其萃 Method for detecting output conduction angle theta of silicon controlled light modulator
CN103874261A (en) * 2012-12-10 2014-06-18 江苏施诺照明有限公司 Single-key remote-control dimming LED lamp
CN104219835A (en) * 2014-08-25 2014-12-17 浙江生辉照明有限公司 Driving device and method of LED lighting device
TWI477198B (en) * 2012-04-20 2015-03-11 Champion Elite Co Ltd Dimming circuit
CN105611672A (en) * 2016-01-18 2016-05-25 浙江上光照明有限公司 Light emitting diode (LED) driving circuit compatible with silicon controlled rectifier dimmer
CN106358342A (en) * 2015-07-22 2017-01-25 上海芯迈科技有限公司 Dimming driving circuit
CN106686797A (en) * 2015-11-05 2017-05-17 财团法人工业技术研究院 Dimming control method and circuit thereof

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI477198B (en) * 2012-04-20 2015-03-11 Champion Elite Co Ltd Dimming circuit
CN103517490B (en) * 2012-06-15 2017-08-22 欧司朗股份有限公司 Driver, luminaire and the method for controlling driver
CN103517490A (en) * 2012-06-15 2014-01-15 欧司朗股份有限公司 A driver, a luminescence device and a method for controlling the driver
CN103582217A (en) * 2012-07-31 2014-02-12 西安展芯微电子技术有限公司 LED drive circuit with controllable current ripples
CN103582218A (en) * 2012-07-31 2014-02-12 西安展芯微电子技术有限公司 LED drive circuit having index-correction and dimming functions
CN103582218B (en) * 2012-07-31 2015-09-02 西安展芯微电子技术股份有限公司 With the LED drive circuit of index correction dimming function
CN103582217B (en) * 2012-07-31 2015-07-29 西安展芯微电子技术股份有限公司 The LED drive circuit that a kind of current ripples is controlled
CN103874261A (en) * 2012-12-10 2014-06-18 江苏施诺照明有限公司 Single-key remote-control dimming LED lamp
CN103687242B (en) * 2013-12-17 2015-05-20 魏其萃 Method for detecting output conduction angle theta of silicon controlled light modulator
CN103687242A (en) * 2013-12-17 2014-03-26 魏其萃 Method for detecting output conduction angle theta of silicon controlled light modulator
CN104219835B (en) * 2014-08-25 2017-05-03 浙江生辉照明有限公司 Driving device and method of LED lighting device
CN104219835A (en) * 2014-08-25 2014-12-17 浙江生辉照明有限公司 Driving device and method of LED lighting device
CN106358342A (en) * 2015-07-22 2017-01-25 上海芯迈科技有限公司 Dimming driving circuit
CN106686797A (en) * 2015-11-05 2017-05-17 财团法人工业技术研究院 Dimming control method and circuit thereof
CN106686797B (en) * 2015-11-05 2018-06-08 财团法人工业技术研究院 Light-dimming method and its circuit
CN105611672A (en) * 2016-01-18 2016-05-25 浙江上光照明有限公司 Light emitting diode (LED) driving circuit compatible with silicon controlled rectifier dimmer

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20111123

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CF01 Termination of patent right due to non-payment of annual fee