CN101330785A - High voltage AC light-adjusting controller for general constant-current LED - Google Patents
High voltage AC light-adjusting controller for general constant-current LED Download PDFInfo
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- CN101330785A CN101330785A CNA2008100737120A CN200810073712A CN101330785A CN 101330785 A CN101330785 A CN 101330785A CN A2008100737120 A CNA2008100737120 A CN A2008100737120A CN 200810073712 A CN200810073712 A CN 200810073712A CN 101330785 A CN101330785 A CN 101330785A
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Abstract
The invention discloses a high-voltage alternating current light adjustment controller of a universal constant-current LED, and comprises an alternating current filter, a controllable resistance dummy load unit circuit, an electronic transformer unit circuit adapted to tangential input, a boosting constant-current unit, a voltage-to-PWM conversion unit circuit, a high-voltage isolating circuit, a light adjustment signal sampling circuit and a negative terminal absorption circuit unit. A high-voltage pulse appearing in the light adjustment process is restrained and absorbed through the alternating current filter and the negative terminal absorption circuit unit, so as to control a light adjustment device; a boosting circuit is matched with the electronic transformer adapted to the tangential input, thereby solving the problem that the electronic transformer is started under low power consumption; a light adjustment signal is taken out of the photoelectric isolating light adjustment signal sampling circuit and passes through the voltage-to-PWM conversion circuit, so that the PWM light adjustment signal is delivered; therefore, the PWM light adjustment to the LED is realized under the condition that the traditional line is not changed; the light adjustment controller is to be widely applied to LED illumination.
Description
Affiliated technical field
The present invention relates to a kind of light adjusting controller, particularly a kind of high voltage AC light-adjusting controller for general constant-current LED.
Background technology
At present, the light modulation of light is to as being incandescent lamp or Halogen lamp LED, and the light modulation of incandescent lamp is by regulating the dimmer of being made up of controllable silicon it to be carried out light modulation, and it is a kind of direct high voltage light modulation; The light modulation of Halogen lamp LED also is by regulating the dimmer of being made up of controllable silicon Halogen Lamp Electronic Transformer to be regulated, and sends correspondent voltage by Halogen Lamp Electronic Transformer and carries out light modulation, and it is a kind of light modulation of low-voltage and high-current.Appearance along with the low-power consumption energy-saving LED, it is energy-conservation that LED has low-voltage, and spectrum is good, colour purity, light efficiency height, smaller to photographed object (as antique) injury, these plurality of advantages of LED make it obtain positive popularization, have begun progressively to replace common light source in the commercialization illumination now.Because LED illumination now is an excessive illuminating product still, also can't be compatible fully aspect the control of circuit: (1) dimming mode with present wiring.Because the characteristic of LED, its supply power mode is all powered with constant current, this makes the light modulation of LED not come light modulation with the mode of regulating its both end voltage size, the light modulation of LED is all by the pwm pulse light modulation at present, and light modulating frequency is all more than 50HZ, and traditional incandescent lamp bulb, Halogen lamp LED are dimmers of series connection before it, by preceding cut or back phase-cut dimming, the effective voltage value that is regulating load carries out light modulation, so traditional light modulation circuit can't directly be installed with the dimming mode compatibility of LED; (2) startup problem.For the existing circuit of compatibility, the supply power mode of LED generally all is to have adopted the power supply of existing or mounted 12VAC Halogen Lamp Electronic Transformer as it, is the conversion supply power mode of civil power.Because the power consumption of LED is very low, need constant-current driving, and it is an electronic type load, and electronic transformer is the special high-power Halogen lamp LED design that is, its power is big, it is pure resistor load, when electronic transformer connected the electronic type load, particularly under the low situation of power, output became very unstable, situation about not starting also appears in some electronic transformer, so, when using Halogen Lamp Electronic Transformer to power, because of above-mentioned factor as the LED power supply, make the Halogen Lamp Electronic Transformer of part brand normally start work, make it can't realize the versatility of using.
Summary of the invention
The object of the present invention is to provide a kind of high voltage AC light-adjusting controller for general constant-current LED; under the situation that does not change the existing mode of connection and brightness adjustment control mode; the conveniently light modulation of real led light source; and effectively protect dimmer in connecting the situation downward modulation photoreduction process of electronic load, not punctured by high-voltage pulse; and overcome existing Halogen Lamp Electronic Transformer and can't normally start the shortcoming that can't connect high-power electronic load with Halogen Lamp Electronic Transformer; and can realize the control of 1～10V light modulation or human body induction energy saving by changing the mode of light modulation input.
Technical scheme of the present invention is:
Described a kind of high voltage AC light-adjusting controller for general constant-current LED, it comprises: dimmer (2), resistance dummy load (3), alternating current filter (4), rectifier bridge (5), controllable resistor dummy load element circuit (6), the electronic transformer element circuit (7) that adapts to the cut input, voltage increase and current constant unit (8), led light source (9), voltage are to PWM converter unit circuit (10), high pressure buffer circuit (11), dim signal sample circuit (12), negative terminal absorption circuit unit (13);
Its annexation: the input of a termination dimmer (2) of civil power, the output of dimmer (2) is in parallel with the other end of civil power to connect resistance dummy load (3), civil power connects the input of alternating current filter (4) after dimmer (2) output, the input of the straight-through rectifier bridge (5) of the output of alternating current filter (4), the negative terminal and the negative terminal absorption circuit unit (13) of rectifier bridge output are connected in series, the anode of rectifier bridge output and the output of negative terminal absorption circuit unit (13), divide three the tunnel, the first via connects the electronic transformer element circuit (7) that adapts to the cut input, the second the tunnel connects controllable resistor dummy load element circuit (6), Third Road connects dim signal sample circuit (12), the output of dim signal sampling unit circuit (12) is connected with high pressure buffer circuit (11), the straight-through voltage of the output of high pressure buffer circuit (11) is to PWM converter unit circuit (10), voltage is connected with voltage increase and current constant unit (8) to the output of PWM converter unit (10), voltage increase and current constant unit (8) output is connected with led light source (9), the output one tunnel that adapts to the electronic transformer element circuit (7) of cut input connects voltage increase and current constant unit (8), and another road connects controllable resistor dummy load element circuit (6).
Described dim signal is got bar circuit (12) and is comprised photoelectrical coupler U1, resistance R 3～R4, R44～R48, capacitor C 5, voltage stabilizing didoe ZD1～ZD3, voltage comparator ic 61/2LM393.
Described voltage comprises resistance R 5～R15, capacitor C 6, diode D3～D4, triode Q1, voltage comparator ic 11/2LM393 and IC12/2LM393 to PWM converter unit circuit (10);
Described controllable resistor dummy load element circuit (6) comprises power resistor R51～R52, resistance R 53～R60, voltage stabilizing didoe ZD5～ZD6, voltage comparator ic 62/2LM393, metal-oxide-semiconductor Q9;
The end of power resistor R51 and an end of resistance R 52 are connected in series, the anode of another termination rectifier bridge (5) output of resistance R 51, the other end ground connection of resistance R 52, the common point of resistance R 51, R52 connects the D utmost point of metal-oxide-semiconductor Q9, the S utmost point of resistance R 52 another termination metal-oxide-semiconductor Q9, the G utmost point of metal-oxide-semiconductor Q9 is connected to the output of voltage comparator ic 62/2LM393 by resistance R 53.
The electronic transformer element circuit (7) of described adaptation cut input comprises high-frequency oscillating circuits (14), triode Q5～Q6, capacitor C 25～C28, resistance R 29～R33, transformer L6;
Capacitor C 27, C28 are connected in series, common point after capacitor C 27, the C28 series connection connects the end of transformer L6, the C utmost point of triode Q5 meets high voltage source DIM DC1, the E utmost point of Q5 connects the C utmost point of Q6 by resistance R 30, the E utmost point connecting resistance R32 of Q6 is to ground, another termination of transformer L6 is formed the intermediate point of half-bridge circuit by triode Q5, Q6 and resistance R 30, R32, and high-frequency oscillating circuits (14) output connects the B utmost point of triode Q5, Q6 respectively.
Described human body sensing economize on electricity control circuit comprises human inductor (15), resistance R 69, capacitor C 39, triode Q12～Q13;
Human inductor (15) output connects the B utmost point of triode Q13, the C utmost point of triode Q13 connects the B utmost point of brightness adjustment control triode Q12 through resistance R 69, the E utmost point of triode Q12 meets power supply 12VD, and the C utmost point connects the in-phase input end of voltage comparator ic 12/2LM393 and the positive pole of capacitor C 39.
"+" termination power+12VD of described 1～10V simulation dimmer, the end of the other end "-" connecting resistance R13.
Described negative terminal absorption circuit unit (13), it comprises capacitor C 3, inductance L 2;
The anode of electronic transformer element circuit (7) the supply voltage input of the described adaptation cut input isolating diode D1 that is connected in series, the anode of another termination rectifier bridge output of isolating diode D1.
Described voltage increase and current constant unit:
(a), booster circuit comprises the chip LM3478 that boosts, resistance R 16～R20, capacitor C 8～C10, inductance L 3, metal-oxide-semiconductor Q2, diode D5, constant-current circuit comprises constant current chip LM3404, resistance R 21～R23, capacitor C 11～C813, inductance L 4, diode D6, booster circuit is exported to constant current source power supply, the current drives led light source that the output of LM3404 is constant;
Or (b), the voltage increase and current constant circuit comprises voltage increase and current constant chip LTC3783, resistance R 61～R68, capacitor C 35～C38, inductance L 9, metal-oxide-semiconductor Q10, Q11, they connect to form the voltage increase and current constant integrated circuit.
The effect of invention:
1, solved the light modulation of LED illumination on traditional light modulation circuit.
2, the simulation light-modulating mode of compatible 1～10V.
3, the brightness adjustment control good linearity is not glimmered.
The high pressure positive pulse that is occurred when 4, the rectification full-bridge separates light modulation adds negative terminal pulse absorption circuit, does not damage dimmer.
5, circuit and existing circuit compatibility are installed.
6, has the energy-conservation inducing function of human body.
Description of drawings
Fig. 1 is a schematic block circuit diagram of the present invention.
Fig. 2 is a basic circuit schematic diagram of the present invention.
Fig. 3 is the electronic transformer basic circuit schematic diagram that the present invention adapts to the cut input.
Fig. 4 is that the present invention adapts to the circuit theory diagrams that the electronic transformer of cut input is made up of IR2162.
Fig. 5 is the electronic transformer discrete component circuit schematic diagram that the present invention adapts to the cut input.
Fig. 6 is dim signal sampling high pressure isolated location circuit theory diagrams of the present invention.
Fig. 7 is a controllable resistor dummy load element circuit schematic diagram of the present invention.
Fig. 8 is the present invention 1～10V light adjusting circuit schematic diagram.
Fig. 9 is human body induction electricity principle figure of the present invention.
Figure 10 is the circuit theory diagrams that booster circuit of the present invention and LED constant-current source combine.
Embodiment
The present invention is further described below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, be schematic block circuit diagram of the present invention, it comprises that civil power (1), dimmer (2), resistance dummy load (3), alternating current filter (4), rectifier bridge (5), controllable resistor dummy load element circuit (6), the electronic transformer element circuit (7) that adapts to the cut input, voltage increase and current constant unit (8), led light source (9), voltage are to PWM converter unit circuit (10), high pressure buffer circuit (11), dim signal sample circuit (12), negative terminal absorption circuit unit (13);
Its annexation: the input of a termination dimmer (2) of civil power, the output of dimmer (2) is in parallel with the other end of civil power to connect resistance dummy load (3), civil power connects the input of alternating current filter (4) after dimmer (2) output, the input of the straight-through rectifier bridge (5) of the output of alternating current filter (4), the negative terminal and the negative terminal absorption circuit unit (13) of rectifier bridge output are connected in series, the anode of rectifier bridge output and the output of negative terminal absorption circuit unit (13), divide three the tunnel, the first via connects the electronic transformer element circuit (7) that adapts to the cut input, the second the tunnel connects controllable resistor dummy load element circuit (6), Third Road connects dim signal sample circuit (12), the output of dim signal sampling unit circuit (12) is connected with high pressure buffer circuit (11), the straight-through voltage of the output of high pressure buffer circuit (11) is to PWM converter unit circuit (10), voltage is connected with voltage increase and current constant unit (8) to the output of PWM converter unit (10), voltage increase and current constant unit (8) is connected with led light source (9), the output one tunnel that adapts to the electronic transformer element circuit (7) of cut input connects voltage increase and current constant unit (8), and another road connects controllable resistor dummy load element circuit (6).
Fig. 2 is a basic circuit schematic diagram of the present invention.
As shown in the figure, it mainly comprises: resistance dummy load R2, alternating current filter (4), rectifier bridge BRIDGE1, controllable resistor dummy load element circuit (6), the electronic transformer element circuit (7) that adapts to the cut input, voltage increase and current constant unit (8), led light source (9), voltage are to PWM converter unit circuit (10), dim signal sample circuit (12), negative terminal absorption circuit unit (13).
Operation principle: the dimmer voltage by dimmer output enters controller through joint J1, resistance R 1 is insurance resistance, R2 is the resistance dummy load, resistance dummy load R2 also is connected on the two ends of civil power after the dimmer output, it is mainly used in corrects the lopsided waveform that dimmer is occurred under the situation of low-power consumption, the dimmer voltage that makes the light modulation gained is near linear.Alternating current filter (4) is by capacitor C 1～C2, inductance L 1 is formed, it is connected on the output line behind the dimmer for light control, attract external interference and prevent that the high-voltage pulse that the present invention produces from disturbing electrical network in the light modulation process with it, prevent that simultaneously the high-voltage pulse that produces in the light modulation process from puncturing dimmer, civil power is after alternating current filter (4) filtering absorbs, straight-through rectifier bridge BRIDGE1, the negative terminal of rectifier bridge output connects by capacitor C 3, on one end of the negative terminal absorption circuit unit (13) that inductance L 2 composes in parallel, the other end of negative terminal absorption circuit unit (13) is then as the ground after the rectification, negative terminal absorption circuit unit (13) mainly is used in the light modulation process, absorb the negative sense peak voltage that electronic transformer occurred, do not allow peak voltage puncture dimmer.The output of rectifier bridge BRIDGE1 divides three the tunnel, and the first via is connected to through isolating diode D1 on the electronic transformer element circuit (7) that adapts to the cut input, and the second the tunnel connects controllable resistor dummy load element circuit (6), and Third Road connects dim signal sample circuit (12).Dim signal sample circuit (12) is made up of resistance R 44～R48, voltage stabilizing didoe ZD2～ZD3, voltage comparator ic 61/2LM393, it is the civil power dim signal to be converted to the light modulation pulse send photoelectrical coupler U1, the light modulation pulse is after photoelectrical coupler U1 isolates, send by resistance R 3～R4, capacitor C 5 and be processed into level and smooth dimmer voltage, this voltage is given voltage to PWM converter unit (10) after voltage stabilizing didoe ZD1 removes disabled voltage.Voltage is by resistance R 5～R15, capacitor C 6, diode D3～D4, triode Q1 to PWM converter unit (10), voltage comparator ic 11/2LM393, IC12/2LM393 form, wherein, resistance R 5～R12, capacitor C 6, diode D3～D4, triode Q1, voltage comparator ic 11/2LM393 form triangle wave generating circuit, are saw-tooth wave generating circuits when the resistance of resistance R 9 is zero.Triangular wave compares with 1～10V voltage of sending here from voltage stabilizing didoe ZD1 by voltage comparator ic 12/2LM393, according to the size of dimmer voltage, sends the PWM dim signal of duty ratio from 0%-100%.The PWM dim signal that voltage produces to PWM converter unit (10) send the light modulation port of IC4LM3404HV, the PWM dim signal is controlled the size of the constant-current source output current of being made up of 1C4LM3404HV, resistance R 21～R23, capacitor C 11～C13, inductance L 4, diode D6, LM3404HV output back is driving LED light source (9) directly, and produces the light of corresponding bright according to the value of PWM.
Adapt to electronic transformer element circuit (7) the output two-way of cut input, the one tunnel send voltage increase and current constant unit (8), and booster circuit is made up of IC2LM3478 and peripheral resistance R 16～R20, capacitor C 7～C10, inductance L 3, metal-oxide-semiconductor Q2, diode D5.Because dimmer has carried out the high pressure cut to civil power, the voltage that adapts to electronic transformer element circuit (7) output of cut input is unsettled, because of led light source is the constant-current driving pulse light modulation, so before the LED constant current source power supply, introduce booster circuit, make the driving voltage of constant-current source be not less than the required voltage of load, but PWM light modulation duty of ratio changes with change in voltage, realizes the conversion of cut to PWM.After booster circuit boosted, output divided two-way, and one the tunnel send LM3404HV power supply, and another road powers to PWM converter unit (10) to voltage by the 12V voltage that IC3LM7812 obtains; Another road of electronic transformer element circuit (7) output of adaptation cut input is through rectifier diode D2 rectification, after capacitor C 4 filtering, by giving controllable resistor dummy load element circuit (6) power supply after the LM7812 voltage stabilizing.
Fig. 3 is the electronic transformer basic circuit schematic diagram that the present invention adapts to the cut input.
As shown in the figure, the electronic transformer basic circuit of adaptation cut input comprises high-frequency oscillating circuits (14), triode Q5～Q6, capacitor C 25～C28, resistance R 29～R33, transformer L6.
Operation principle: capacitor C 27, C28 are connected in series, common point after capacitor C 27, the C28 series connection connects the end of transformer L6, the C utmost point of triode Q5 meets high voltage source DIM DC1, the E utmost point of Q5 connects the C utmost point of Q6 by resistance R 30, the E utmost point connecting resistance R32 of Q6 is to ground, another termination of transformer L6 is formed the intermediate point of half-bridge circuit by triode Q5, Q6 and resistance R 30, R32, and high-frequency oscillating circuits (14) output connects the B utmost point of triode Q5, Q6 respectively.High-frequency oscillating circuits (14) output ALT pulse promotes triode Q5, Q6, allows triode Q5, Q6 alternation and then the output of control transformer L6.
Fig. 4 is that the present invention adapts to the circuit theory diagrams that the electronic transformer of cut input is made up of IR2162.
As shown in the figure, the electronic transformer of adaptation cut input comprises IC5IR2162, resistance R 24～R28, capacitor C 14～C24, diode D7～D10, voltage stabilizing didoe ZD7, metal-oxide-semiconductor Q3, Q4, transformer L5.
Operation principle: metal-oxide-semiconductor Q3, Q4 form half-bridge circuit, and IC5IR2162 is for vibration master chip, output ALT pulse promotes metal-oxide-semiconductor Q3, Q4, allow metal-oxide-semiconductor Q3, Q4 alternation and then control transformer L5.
Fig. 5 is the electronic transformer discrete component circuit schematic diagram that the present invention adapts to the cut input.
As shown in the figure, the electronic transformer discrete component circuit of adaptation cut input comprises: resistance R 34～R43, capacitor C 29～C34, diode D11, bidirectional trigger diode BD3, triode Q7, Q8, output transformer L7, positive feedback transformer L8.
Operation principle: positive feedback transformer L8 is the vibration output transformer, triode Q7, Q8 form half-bridge circuit output, they are subjected to the control of positive feedback transformer L8 output, control the work of their alternate conduction, the elementary end series connection of transformer L7 is at the primary side of positive feedback transformer L8, after positive feedback transformer L8 output, connect the output that triode Q7, Q8 form half-bridge circuit, the common port that another termination is composed in series by capacitor C 32, C34.One group of voltage ACL1, ACN1 of transformer L7 output lead to controllable resistor dummy load element circuit (6), and another group voltage ACL, ACN lead to voltage increase and current constant unit (8), respectively to they power supplies.
Fig. 6 is dim signal sampling high pressure isolated location circuit theory diagrams of the present invention.
As shown in the figure, dim signal sampling high pressure isolated location circuit comprises resistance R 44～R48, R3～R4, voltage stabilizing didoe ZD1～ZD3, photoelectrical coupler U1, voltage comparator ic 61/2LM393, capacitor C 5.
Operation principle: required working standard reference voltage when resistance R 46, R47 series connection provides comparison for the in-phase end of voltage comparator ic 61/2LM393, the output of IC61/2LM393 is connected to the input of photoelectrical coupler U1, another termination+12VA of photoelectrical coupler U1 through resistance R 48.During the dimmer phase-cut dimming, the phase place of DIM DC terminal voltage changes, the voltage of phase change is through resistance R 44, R45 dividing potential drop, after voltage stabilizing didoe ZD2, the ZD3 voltage stabilizing dividing potential drop, deliver to the end of oppisite phase of voltage comparator 1C61/2LM393, the variation of the voltage follow dimmer voltage DIM DC of this end from the sampling of the common point of voltage stabilizing didoe ZD2, ZD3.During phase-cut dimming, cut is many more, and voltage is also just low more, and cut pulse voltage and reference voltage are relatively exported the square wave dim signal.Cut is many more, and the frequency duty ratio of voltage comparator ic 61/2LM393 output is just more little, otherwise just the frequency duty ratio of output is just big more.With the proportional dim signal of dimmer voltage after photoelectrical coupler U1 isolates, by resistance R 3, R4 dividing potential drop, capacitor C 5 filtering, after voltage stabilizing didoe ZD1 removes disabled bottom voltage, obtain the dimmer voltage of 1～10V, the dimmer voltage of 1～10V send voltage to PWM converter unit circuit (10), changes into the pwm signal of wanting light modulation.
Fig. 7 is a controllable resistor dummy load element circuit schematic diagram of the present invention.
As shown in the figure, controllable resistor dummy load element circuit comprises power resistor R51～R52, resistance R 53～R60, voltage stabilizing didoe ZD5～ZD6, voltage comparator ic 62/2LM393, metal-oxide-semiconductor Q9.
Operation principle: the end of power resistor R51 and an end of resistance R 52 are connected in series, the anode DIM DC of another termination rectifier bridge (5) output of resistance R 51, the other end ground connection of resistance R 52, the D utmost point connecting resistance R51 of metal-oxide-semiconductor Q9, the common point of resistance R 52, S utmost point ground connection, just the D utmost point of metal-oxide-semiconductor Q9 and the S utmost point are to be connected on respectively on the two ends of resistance R 52, when metal-oxide-semiconductor Q9 conducting, resistance R 52 is by short circuit, and the G utmost point of metal-oxide-semiconductor Q9 is connected to the output of voltage comparator ic 62/2LM393 by resistance R 53; Wherein, resistance dummy load R51, R52 play level and smooth dimmer voltage, for the sampling of dim signal sample circuit is prepared.Resistance R 58, R59 are composed in series bleeder circuit, for the in-phase end of voltage comparator ic 62/2LM393 provides comparison reference voltage, civil power after the rectification is through resistance R 56, R57, R60 dividing potential drop, voltage stabilizing didoe ZD6 voltage stabilizing, give the inverting input of voltage comparator ic 62/2LM393 from the common point sampling of resistance R 56, R57, and send control signal after, and then the ON time of control metal-oxide-semiconductor Q9 with the voltage ratio of in-phase end input; When light modulation, if the voltage of DIM DC is low more, the ON time of voltage comparator ic 62/2LM393 control metal-oxide-semiconductor Q9 is long more, and the electric current that flows through dummy load R51, R52 is relatively just big more; Otherwise dimmer voltage is high more, and ON time is just short, and the electric current that flows through dummy load R51, R52 is relatively just little, but total variable power is little.If there is not this control circuit, when only having connect R51, R52 resistance, when dimmer voltage DIM DC is very high,, played effect for getting dim signal though played level and smooth dimmer voltage as dummy load, resistance R 51, R52 power consumption are very big, have wasted electric energy; When dimmer voltage DIM DC was very low, resistance R 51, R52 power consumption were very little, and this moment, deformity appearred in dimmer voltage, can't effectively normally obtain dim signal.
Fig. 8 is the present invention 1～10V light adjusting circuit schematic diagram.
As shown in the figure, the working method of circuit is the same with basic circuit schematic diagram Fig. 2 substantially, and different is that dimmer voltage is passed through 1～10V simulation dimmer control dimmer voltage, and then the realization light modulation."+" termination power+12VD of 1～10V simulation dimmer, the light modulation turn-knob of rotation 1～10V simulation dimmer, the dimmer voltage of "-" end output 1～10V of 1～10V simulation dimmer, through resistance R 13 and R14 dividing potential drop comparative voltage as voltage comparator ic 12/2LM393 in-phase end, and with the triangular wave of the inverting input of voltage comparator ic 12/2LM393 relatively, export the PWM dim signal of different duty, thereby realize the simulation light modulation of 1～10V.
Fig. 9 is human body induction electricity principle figure of the present invention.
As shown in the figure, because voltage determines its duty ratio to the light modulation pulse that PWM converter unit circuit (10) produces by voltage, voltage high duty ratio more is big more, when human inductor (15) is not sensed people's signal, output low level, triode Q12, Q13 ends, resistance R 13, R14 divide voltage very low, voltage comparator ic 12/2LM393 sends the very little PWM dim signal of duty ratio, this moment, lamp was little bright, as the people during near human inductor (15), human inductor output high level, triode Q12, the Q13 saturation conduction, resistance R 13 is by triode Q12 short circuit, the in-phase input end voltage of voltage comparator ic 12/2LM393 equals 12V, and what this moment, voltage comparator ic 12/2LM393 exported is high level, and lamp is the brightest; As people during away from human inductor (15), human inductor (15) output low level, triode Q12, Q13 end, and slowly discharge by electric capacity, and lamp is again from the brightest slowly deepening, thereby reaches purpose of energy saving.
Figure 10 is the circuit theory diagrams that booster circuit of the present invention and LED constant-current source combine.
As shown in the figure, its basic functional principle, annexation is identical substantially with basic circuit schematic diagram Fig. 2 of the present invention, different is, and it has adopted peripheral resistance R 61～R68 of a voltage increase and current constant chip LTC3783 and LTC3783, capacitor C 7, C35～C38, boost inductance L9, the driven MOS of boosting pipe Q10, led light source driven MOS pipe Q11 forms the voltage increase and current constant unit, this circuit has the time of boosting, can realize constant current output again, dimming interface is arranged again simultaneously, and it can directly replace constant-current source of being made up of LM3404HV and periphery thereof and the booster circuit of being made up of LM3478 and periphery thereof.
The present invention is specially adapted to occasion light modulations such as market, hotel, family expenses and uses.
Though the present invention describes with reference to the above embodiments; but those of ordinary skill in the art; the above embodiment that recognizes that should be understood that only is the excellent example of explanation of the present invention; should understand and wherein can do each and change and revise and on Fang Yi, do not break away from the present invention; so be not as qualification of the present invention; as long as in connotation scope of the present invention, to the variation distortion of above-described enforcement or revise the protection range that all will fall into the requirement of right of the present invention.
Claims (10)
1, a kind of high voltage AC light-adjusting controller for general constant-current LED, it comprises: dimmer (2), resistance dummy load (3), alternating current filter (4), rectifier bridge (5), controllable resistor dummy load element circuit (6), the electronic transformer element circuit (7) that adapts to the cut input, voltage increase and current constant unit (8), led light source (9), voltage are to PWM converter unit circuit (10), high pressure buffer circuit (11), dim signal sample circuit (12), negative terminal absorption circuit unit (13);
Its annexation: the input of a termination dimmer (2) of civil power, the output of dimmer (2) is in parallel with the other end of civil power to connect resistance dummy load (3), civil power connects the input of alternating current filter (4) after dimmer (2) output, the input of the straight-through rectifier bridge (5) of the output of alternating current filter (4), the negative terminal and the negative terminal absorption circuit unit (13) of rectifier bridge output are connected in series, the anode of rectifier bridge output and the output of negative terminal absorption circuit unit (13), divide three the tunnel, the first via connects the electronic transformer element circuit (7) that adapts to the cut input, the second the tunnel connects controllable resistor dummy load element circuit (6), Third Road connects dim signal sample circuit (12), the output of dim signal sampling unit circuit (12) is connected with high pressure buffer circuit (11), the straight-through voltage of the output of high pressure buffer circuit (11) is to PWM converter unit circuit (10), voltage is connected with voltage increase and current constant unit (8) to the output of PWM converter unit (10), voltage increase and current constant unit (8) output is connected with led light source (9), the output one tunnel that adapts to the electronic transformer element circuit (7) of cut input connects voltage increase and current constant unit (8), and another road connects controllable resistor dummy load element circuit (6).
2, a kind of high voltage AC light-adjusting controller for general constant-current LED according to claim 1 is characterized in that:
Described dim signal sample circuit (12) comprises photoelectrical coupler U1, resistance R 3～R4, R44～R48, capacitor C 5, voltage stabilizing didoe ZD1～ZD3, voltage comparator ic 6 1/2LM393.
3, a kind of high voltage AC light-adjusting controller for general constant-current LED according to claim 1 is characterized in that:
Described voltage comprises resistance R 5～R15, capacitor C 6, diode D3～D4, triode Q1, voltage comparator ic 1 1/2LM393 and IC1 2/2LM393 to PWM converter unit circuit (10);
Voltage comparator ic 1 1/2LM393 and resistance R 5～R12, capacitor C 6, diode D2～D3, triode Q1 connect to form triangle wave generating circuit, R13～R14 is connected in series, common point after the series connection connects the in-phase input end of IC1 2/2LM393, be connected to the inverting input of voltage comparator ic 1 2/2LM393 from the triangular wave of IC1 1/2LM393 in-phase end output, and with level and smooth dimmer voltage relatively, the PWM dim signal of generation is connected to voltage increase and current constant unit (8).
4, a kind of high voltage AC light-adjusting controller for general constant-current LED according to claim 1 is characterized in that:
Described controllable resistor dummy load element circuit (6) comprises power resistor R51～R52, resistance R 53～R60, voltage stabilizing didoe ZD5～ZD6, voltage comparator ic 6 2/2LM393, metal-oxide-semiconductor Q9;
The end of power resistor R51 and an end of resistance R 52 are connected in series, the anode of another termination rectifier bridge (5) output of resistance R 51, the other end ground connection of resistance R 52, the common point of resistance R 51, R52 connects the D utmost point of metal-oxide-semiconductor Q9, the S utmost point of resistance R 52 another termination metal-oxide-semiconductor Q9, the G utmost point of metal-oxide-semiconductor Q9 is connected to the output of voltage comparator ic 6 2/2LM393 by resistance R 53.
5, a kind of high voltage AC light-adjusting controller for general constant-current LED according to claim 1 is characterized in that:
The electronic transformer element circuit (7) of described adaptation cut input comprises high-frequency oscillating circuits (14), triode Q5～Q6, capacitor C 25～C28, resistance R 29～R33, transformer L6;
Capacitor C 27, C28 are connected in series, common point after capacitor C 27, the C28 series connection connects the end of transformer L6, the C utmost point of triode Q5 meets high voltage source DIM DC1, the E utmost point of Q5 connects the C utmost point of Q6 by resistance R 30, the E utmost point connecting resistance R32 of Q6 is to ground, another termination of transformer L6 is formed the intermediate point of half-bridge circuit by triode Q5, Q6 and resistance R 30, R32, and high-frequency oscillating circuits (14) output connects the B utmost point of triode Q5, Q6 respectively.
6, a kind of high voltage AC light-adjusting controller for general constant-current LED according to claim 1 is characterized in that:
Described human body sensing economize on electricity control circuit comprises human inductor (15), resistance R 69, capacitor C 39, triode Q12～Q13;
Human inductor (15) output connects the B utmost point of triode Q13, the C utmost point of triode Q13 connects the B utmost point of brightness adjustment control triode Q12 through resistance R 69, the E utmost point of triode Q12 meets power supply 12VD, and the C utmost point connects the in-phase input end of voltage comparator ic 1 2/2LM393 and the positive pole of capacitor C 39.
7, a kind of high voltage AC light-adjusting controller for general constant-current LED according to claim 1 is characterized in that:
"+" termination power+12VD of described 1～10V simulation dimmer, the end of the other end "-" connecting resistance R13.
8, a kind of high voltage AC light-adjusting controller for general constant-current LED according to claim 1 is characterized in that:
Described negative terminal absorption circuit unit (13), it comprises capacitor C 3, inductance L 2;
Capacitor C 3, inductance L 2 are connected in parallel, and its end of back in parallel is connected with the negative terminal of rectifier bridge BRIDGE1, the ground of the other end after as AC rectification.
9, a kind of high voltage AC light-adjusting controller for general constant-current LED according to claim 1 is characterized in that:
The anode of electronic transformer element circuit (7) the supply voltage input of the described adaptation cut input isolating diode D1 that is connected in series, the anode of another termination rectifier bridge output of isolating diode D1.
10, a kind of high voltage AC light-adjusting controller for general constant-current LED according to claim 1 is characterized in that:
Described voltage increase and current constant unit:
(a), booster circuit comprises the chip LM3478 that boosts, resistance R 16～R20, capacitor C 8～C10, inductance L 3, metal-oxide-semiconductor Q2, diode D5, constant-current circuit comprises constant current chip LM3404, resistance R 21～R23, capacitor C 11～C813, inductance L 4, diode D6, booster circuit is exported to constant current source power supply, the current drives led light source that the output of LM3404 is constant;
Or (b), the voltage increase and current constant circuit comprises voltage increase and current constant chip LTC3783, resistance R 61～R68, capacitor C 35～C38, inductance L 9, metal-oxide-semiconductor Q10, Q11, they connect to form the voltage increase and current constant integrated circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008100737120A CN101330785A (en) | 2008-08-04 | 2008-08-04 | High voltage AC light-adjusting controller for general constant-current LED |
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| CNA2008100737120A CN101330785A (en) | 2008-08-04 | 2008-08-04 | High voltage AC light-adjusting controller for general constant-current LED |
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| CNA2008100737120A Pending CN101330785A (en) | 2008-08-04 | 2008-08-04 | High voltage AC light-adjusting controller for general constant-current LED |
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Open date: 20081224 |