CN105228291A - Integrated LED driving circuit and method of operation thereof - Google Patents
Integrated LED driving circuit and method of operation thereof Download PDFInfo
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- CN105228291A CN105228291A CN201410320431.6A CN201410320431A CN105228291A CN 105228291 A CN105228291 A CN 105228291A CN 201410320431 A CN201410320431 A CN 201410320431A CN 105228291 A CN105228291 A CN 105228291A
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Abstract
The invention provides a kind of integrated LED driving circuit and method of operation thereof; Wherein, this integrated LED driving circuit comprises bidirectional power line communication unit, power transfer module and determines electric current/determine voltage control unit.This bidirectional power line communication unit receives alternating voltage, and changes the modulating signal on this alternating voltage, to produce dimming control signal.This power transfer module receives this alternating voltage, and changes this alternating voltage to produce output voltage.This determines electric current/determine voltage control unit to receive this dimming control signal, determines electric current or voltage is determined in light modulation to produce light modulation.This integrated LED driving circuit to export light modulation and determine electric current or voltage and output voltage are determined in light modulation, and then drives LED light string.
Description
Technical field
The present invention relates to a kind of LED driving circuit and method of operation thereof, particularly relate to a kind of integrated LED driving circuit and method of operation thereof.
Background technology
Power line communication (powerlinecommunication, PLC), also known as power line network, means to utilize existing power line, data or information is transmitted with digital signal processing method.Power line communication mainly utilizes the interchange 50/60Hz of electric power online as carrier wave, then is carried by high frequency (number KHz or MHz) modulating signal by coupling assembly.Contrary, the signal of electric power online is coupled through separating, the interchange 50/60Hz of filtering electric power online, then after separating modulation, and signal is amplified reduction.Use power line communication technology, substantially do not need again to lay network line in addition, and the geographic coverage that power circuit is contained is wide, much larger than the circuit of other carriers.
Refer to the block diagram that Fig. 1 is correlation technique LED drive system first embodiment.This LED drive system mainly comprises brightness adjustment control converting unit 10A, LED driving circuit 20A and LED light string 30A.This LED drive system to receive alternating voltage Vac, and changes this alternating voltage Vac to drive this LED light string 30A.This LED driving circuit 20A comprises power conversion unit 202A, brightness adjustment control interface 204A, determines electric current/determine voltage control unit 206A and rectification filtering unit 208A.Wherein, this LED driving circuit 20A with integrate in the same module, and, this brightness adjustment control converting unit 10A this LED driving circuit 20A external.
This brightness adjustment control converting unit 10A connects this LED driving circuit 20A, and the modulating signal changed on this alternating voltage Vac, voltage Vdim or light modulation pulse wave width modulation signal (Pulse-WidthModulation, PWM) signal Vpwm is determined to produce light modulation.Wherein, Vdim+ and Vdim-is respectively the positive and negative electrode that voltage Vdim is determined in this light modulation, and logical superpotential height decides the level of light modulation.In addition, Vpwm+ and Vpwm-is respectively the positive and negative electrode of this light modulation pulse wave width modulation signal Vpwm, this light modulation pulse wave width modulation signal Vpwm signal is with positive and negative level digital signal, is decided the level of light modulation by responsibility cycle (duty) size of this light modulation pulse wave width modulation signal Vpwm signal.Moreover this brightness adjustment control converting unit 10A, (comprises live wire input voltage V by hot voltage
liwith live wire output voltage V
lo) mode that is connected in series, by this live wire input voltage V
liinput, and from this live wire output voltage V
loexport, modulating signal is captured out.And this live wire output voltage V
lobe connected to this LED driving circuit 20A, and then this LED driving circuit 20A is powered.In this LED drive system of tradition, this LED driving circuit 20A has this brightness adjustment control interface 204A, and voltage Vdim is determined in this light modulation produced in order to receive this brightness adjustment control converting unit 10A.Further, this brightness adjustment control interface 204A produces dimming control signal (non-icon), and this determines after electric current/determine voltage control unit 206A receives this dimming control signal, by this LED driving circuit 20A outputting drive voltage V
lEDthis LED light string 30A is provided and determines electric current or determine voltage light modulation drived control, wherein, V
lED+with V
lED-be respectively this driving voltage V
lEDpositive and negative electrode.In this example, this brightness adjustment control interface 204A can be 0-10V light modulation interface.By this 0-10V dimming interface, this brightness adjustment control converting unit 10A produces this unidirectional light modulation and determines voltage Vdim or this light modulation pulse wave width modulation signal Vpwm to provide the unidirectional brightness adjustment control of this LED light string 30A.
Refer to the block schematic diagram that Fig. 2 is correlation technique LED drive system second embodiment.This second embodiment and this first embodiment maximum difference aforementioned are in the present embodiment, and this LED drive system is to provide two-way brightness adjustment control.Therefore, in this example, this brightness adjustment control interface 204A can be digitally addressed dimming interface (DigitalAddressableLightingInterface, DALI).By this digitally addressed dimming interface, this brightness adjustment control converting unit 10A produces this two-way light modulation and determines voltage Vdim to provide the two-way brightness adjustment control of this LED light string 30A.
No matter be traditional first embodiment or the second embodiment, all need the signal first control signal being converted to DALI or 0-10V or PWM specification, and remove by the signal after conversion the current signal controlling outlet side (LED side) again.But, because each control interface is all independent and needs isolation, therefore, change through multistage signal, such as PLC turns DALI or PLC and turns 0-10V, so not only cause loss increase, efficiency reduction, also the configuration because of change-over circuit is made volume and the increase becoming large and cost that takes up room.Moreover, because this brightness adjustment control converting unit 10A is external in this LED driving circuit 20A, therefore, not only increase extra circuit connection, and also increase the man-hour of connections.
Therefore, how to design a kind of integrated LED driving circuit and method of operation thereof, not only can realize the function of two-way light modulation, save DALI brightness adjustment control interface or 0-10V brightness adjustment control interface, and can reduced volume with take up room, reduce cost and improve conversion efficiency, by inventor wish is capable overcomes and solve one large problem.
Summary of the invention
An object of the present invention is to provide a kind of integrated LED driving circuit, and this integrated LED driving circuit receives alternating voltage, and changes this alternating voltage to drive LED light string.This integrated LED driving circuit comprises bidirectional power line communication unit, power transfer module and determines electric current/determine voltage control unit.This bidirectional power line communication unit receives this alternating voltage, and the modulating signal changed on this alternating voltage is to produce dimming control signal.This power transfer module receives this alternating voltage, and changes this alternating voltage to produce output voltage.This determines electric current/determine voltage control unit to receive this dimming control signal, determines electric current or voltage is determined in light modulation to produce light modulation.This integrated LED driving circuit to export this light modulation and determine electric current or voltage and this output voltage are determined in this light modulation, and then drives this LED light string.
Integrated LED driving circuit as above, wherein said integrated LED driving circuit also comprises:
Rectification filtering unit, receive described light modulation and determine electric current or voltage and described output voltage are determined in described light modulation, electric current or described light modulation are determined to described light modulation and determines the operation that voltage and described output voltage provide rectification and filtering, and outputting drive voltage, to drive described LED light string.
Integrated LED driving circuit as above, wherein said bidirectional power line communication unit comprises:
Microcontroller, receives described alternating voltage to produce voltage signal, and receives changing voltage, to provide the voltage needed for described microcontroller;
Optical coupler, receives described voltage signal, and changes described voltage signal to export modulating signal; And
Dim signal generator, receives described modulating signal, to produce described dimming control signal.
Integrated LED driving circuit as above, wherein said power transfer module comprises:
Power filtering unit, receives the described alternating voltage that described microcontroller exports, to provide the operation of electromagnetic noise filtering to described alternating voltage, and output filtering voltage;
Full wave rectifying unit, receives described filtering voltage, described filtering voltage is provided to the operation of full-wave rectification, and exports commutating voltage;
Electrical source exchange unit, receives described commutating voltage, changes described commutating voltage, and output switching voltage; And
Main transformer, receives described switched voltage, changes described switched voltage, and, export described output voltage.
Integrated LED driving circuit as above, wherein said bidirectional power line communication unit also comprises:
Voltage quasi position transducer, to change the described supply power voltage determined electric current/determine voltage control unit and export, to provide the voltage needed for described dim signal generator.
Integrated LED driving circuit as above, wherein said power transfer module also comprises:
Auxiliary transformer, receives described commutating voltage, changes described commutating voltage, and exports control voltage, determines electric current/the determine voltage needed for voltage control unit to provide described.
Integrated LED driving circuit as above, wherein said bidirectional power line communication unit, described power transfer module, describedly determines electric current/determine voltage control unit and described rectification filtering unit is integrated in the same module.
Another object of the present invention is to the method for operation providing a kind of integrated LED driving circuit, this integrated LED driving circuit receives alternating voltage, and changes this alternating voltage to drive LED light string.This method of operation comprises the following step: (a) provides bidirectional power line communication unit, receives this alternating voltage, and the modulating signal changed on this alternating voltage is to produce dimming control signal; B () provides power transfer module, receive this alternating voltage, and changes this alternating voltage to produce output voltage; C () provides and determines electric current/determine voltage control unit, receive this dimming control signal, determines electric current or voltage is determined in light modulation to produce light modulation; And (d) this integrated LED driving circuit is to export this light modulation and determine electric current or voltage and this output voltage are determined in this light modulation, and then drive this LED light string.
The method of operation of integrated LED driving circuit as above, wherein also comprises:
(c ') rectification filtering unit is provided, receive described light modulation and determine electric current or voltage and described output voltage are determined in described light modulation, electric current or described light modulation are determined to described light modulation and determines the operation that voltage and described output voltage provide rectification and filtering, and outputting drive voltage, to drive described LED light string.
The method of operation of integrated LED driving circuit as above, wherein said bidirectional power line communication unit comprises:
Microcontroller, receives described alternating voltage to produce voltage signal, and receives changing voltage, to provide the voltage needed for described microcontroller;
Optical coupler, receives described voltage signal, and changes described voltage signal to export modulating signal; And
Dim signal generator, receives described modulating signal, to produce described dimming control signal.
The method of operation of integrated LED driving circuit as above, wherein said power transfer module comprises:
Power filtering unit, receives the described alternating voltage that described microcontroller exports, to provide the operation of electromagnetic noise filtering to described alternating voltage, and output filtering voltage;
Full wave rectifying unit, receives described filtering voltage, described filtering voltage is provided to the operation of full-wave rectification, and exports commutating voltage;
Electrical source exchange unit, receives described commutating voltage, changes described commutating voltage, and output switching voltage; And
Main transformer, receives described switched voltage, changes described switched voltage, and, export described output voltage.
The method of operation of integrated LED driving circuit as above, wherein said bidirectional power line communication unit also comprises:
Voltage quasi position transducer, to change the described supply power voltage determined electric current/determine voltage control unit and export, to provide the voltage needed for described dim signal generator.
The method of operation of integrated LED driving circuit as above, wherein said power transfer module also comprises:
Auxiliary transformer, receives described commutating voltage, changes described commutating voltage, and exports control voltage, determines electric current/the determine voltage needed for voltage control unit to provide described.
The method of operation of integrated LED driving circuit as above, wherein said bidirectional power line communication unit, described power transfer module, describedly determines electric current/determine voltage control unit and described rectification filtering unit is integrated in the same module.
In order to technology, means and effect that the present invention takes for reaching predetermined object further can be understood, refer to following detailed description for the present invention and accompanying drawing, believe object of the present invention, feature and feature, when obtaining thus deeply and concrete understanding, but institute's drawings attached only provides reference and explanation use, is not used for being limited the present invention.
Accompanying drawing explanation
Fig. 1 is the block diagram of correlation technique LED drive system first embodiment;
Fig. 2 is the block diagram of correlation technique LED drive system second embodiment;
Fig. 3 is the block diagram that the integrated LED driving circuit of the present invention drives LED light string;
Fig. 4 is the block diagram of the present invention's integrated LED driving circuit first embodiment;
Fig. 5 is the block diagram of the present invention's integrated LED driving circuit second embodiment; And
Fig. 6 is the flow chart of integrated LED driving circuit method of operation.
Embodiment
The technical content and a detailed description for the present invention, coordinate the figure that bows to be described as follows:
Referring to Fig. 3 is the block diagram that the integrated LED driving circuit of the present invention drives LED light string.As ise apparent from FIG. 3, this integrated LED driving circuit 10 of the present invention directly receives external communication voltage Vac, and changes this alternating voltage Vac to produce driving voltage V
lED, to drive this LED light string 20.In the present invention, this LED driving circuit mainly has two large characteristics: one, this LED driving circuit is to be integrated into modularization; Two, this integrated LED driving circuit has the function of two-way brightness adjustment control.
Refer to the block diagram that Fig. 4 is the present invention's integrated LED driving circuit first embodiment.This integrated LED driving circuit 10 receives alternating voltage Vac, and changes this alternating voltage Vac to drive LED light string 20.This integrated LED driving circuit 10 comprises bidirectional power line communication unit 102, power transfer module 104 and determines electric current/determine voltage control unit 106.This bidirectional power line communication unit 102 receives the live wire input voltage VLi of this alternating voltage Vac, and the modulating signal changed on this alternating voltage Vac is to produce dimming control signal Sdim.This power transfer module 104 receives the live wire output voltage V of this alternating voltage Vac
lo, and change this live wire output voltage V
loto produce output voltage Vo.Wherein this live wire output voltage V
loproduced by this bidirectional power line communication unit 102.This determines electric current/determine voltage control unit 106 to receive this dimming control signal Sdim, determines electric current I dim or voltage Vdim is determined in light modulation to produce light modulation.Wherein, this integrated LED driving circuit 10 to export this light modulation and determine electric current I dim or voltage Vdim and this output voltage Vo is determined in this light modulation, and then drives this LED light string 20.Be worth mentioning, if this bidirectional power line communication unit 102 can be isolated or non-isolated.If isolated, then this power transfer module 104 can use to the primary side of this bidirectional power line communication unit 102 by generation changing voltage Vp simultaneously.
In addition, this integrated LED driving circuit 10 also comprises rectification filtering unit 108.This rectification filtering unit 108 receives this light modulation and determines electric current I dim or voltage Vdim and this output voltage Vo is determined in this light modulation, electric current I dim is determined to this light modulation or the operation that voltage Vdim and this output voltage Vo provides rectification and filtering is determined in this light modulation, and outputting drive voltage VLED, to drive this LED light string 20.As for the operating instruction of this integrated LED driving circuit, by hereinafter there being detailed elaboration.
Refer to the block diagram that Fig. 5 is the present invention's integrated LED driving circuit second embodiment.This integrated LED driving circuit embodiment shown in Fig. 5 is the detailed block diagram of Fig. 4 integrated LED driving circuit embodiment.More specifically, this bidirectional power line communication unit 102 comprises microcontroller 1021, optical coupler 1022 and dim signal generator 1023.This microcontroller 1021 receives this live wire input voltage V of this alternating voltage Vac
lito produce voltage signal Sm, and receive this changing voltage Vp, to provide the voltage needed for this microcontroller 1021.This optical coupler 1022 receives this voltage signal Sm, and changes this voltage signal Sm to export modulating signal Spwm.This dim signal generator 1023 receives this modulating signal Spwm, to produce this dimming control signal Sdim.Moreover this bidirectional power line communication unit 102 also comprises voltage quasi position transducer 1024.This voltage quasi position transducer 1024 determines the supply power voltage Vx that electric current/determine voltage control unit exports, to provide the voltage needed for this dim signal generator 1023 to change this.
In addition, this power transfer module 104 comprises power filtering unit 1041, full wave rectifying unit 1042, electrical source exchange unit 1043 and main transformer 1044.This power filtering unit 1041 receives this live wire output voltage V that this microcontroller 1021 exports
lo, with to this live wire output voltage V
lothe operation of electromagnetic noise filtering is provided, and output filtering voltage Vf.This full wave rectifying unit 1042 receives this filtering voltage Vf, this filtering voltage Vf is provided to the operation of full-wave rectification, and exports commutating voltage Vr.This electrical source exchange unit 1043 receives this commutating voltage Vr, changes this commutating voltage Vr, and output switching voltage Vs.Wherein, this electrical source exchange unit 1043 by outside pulse wave width modulation (Pulse-WidthModulation, PWM) signal controlling, and has the function of power factor correcting (PowerFactorCorrection, PFC).This main transformer 1044 receives this switched voltage Vs, changes this switched voltage Vs, and, export this output voltage Vo.Moreover this power transfer module 104 also comprises auxiliary transformer 1045.This auxiliary transformer 1045 receives this commutating voltage Vr, changes this commutating voltage Vr, and exports control voltage Vc, determines electric current/the determine voltage needed for voltage control unit 106 to provide this.
Be worth mentioning, this integrated LED driving circuit of this case with by this bidirectional power line communication unit 102, this power transfer module 104, this determines electric current/determine voltage control unit 106 and this rectification filtering unit 108 is integrated into modularization.That is dimming control system and the electric power system of this LED light string 20 are integrated into modularization, to reach, this LED light string 20 is powered and the operation of light modulation.More specifically, due to utilize this bidirectional power line communication unit 102 produce this dimming control signal Sdim, to realize dimming control function, therefore, by this bidirectional power line communication unit 102 there is this microcontroller 1021, this optical coupler 1022, this dim signal generator 1023 and this voltage quasi position transducer 1024 this alternating voltage Vac changed, and export in the transfer process of this dimming control signal Sdim, directly can capture the specification voltage needed for dim signal.Be different from conventional light emitting diodes drive system (as shown in Figure 1 and Figure 2), this brightness adjustment control converting unit 10A this LED driving circuit 20A external, therefore control interface is all independent and needs isolation, moreover the process of dim signal needs to change via the signal of multiphase converter.In the present case, the voltage transitions provided with this power transfer module 104 by this bidirectional power line communication unit 102 in block configuration, can directly capture required voltage swing, as the specification voltage needed for brightness adjustment control.In other words, in the present case, only need use this bidirectional power line communication unit 102, the DALI brightness adjustment control interface required for conventional light emitting diodes drive system or 0-10V brightness adjustment control interface can be saved.
Refer to the flow chart that Fig. 6 is integrated LED driving circuit method of operation.This integrated LED driving circuit receives alternating voltage, and changes this alternating voltage to drive LED light string.The step of this method of operation comprises: first, provides bidirectional power line communication unit, receives this alternating voltage, and the modulating signal changed on this alternating voltage is to produce dimming control signal (S10).This bidirectional power line communication unit comprises microcontroller, optical coupler and dim signal generator.This microcontroller receives this alternating voltage to produce voltage signal, and receives changing voltage, to provide the voltage needed for this microcontroller.This optical coupler receives this voltage signal, and changes this voltage signal to export modulating signal.This dim signal generator receives this modulating signal, to produce this dimming control signal.Moreover this bidirectional power line communication unit also comprises voltage quasi position transducer.This voltage quasi position transducer determines the supply power voltage that electric current/determine voltage control unit exports, to provide the voltage needed for this dim signal generator to change this.
Then, provide power transfer module, receive this alternating voltage, and change this alternating voltage to produce output voltage (S20).This power transfer module comprises power filtering unit, full wave rectifying unit, electrical source exchange unit and main transformer.This power filtering unit receives this alternating voltage that this microcontroller exports, and this alternating voltage is provided to the operation of electromagnetic noise filtering, and output filtering voltage.This full wave rectifying unit receives this filtering voltage, this filtering voltage is provided to the operation of full-wave rectification, and exports commutating voltage.This electrical source exchange unit receives this commutating voltage, changes this commutating voltage, and output switching voltage.Wherein, this electrical source exchange unit by outside pulse wave width modulation (Pulse-WidthModulation, PWM) signal controlling, and has the function of power factor correcting (PowerFactorCorrection, PFC).This main transformer receives this switched voltage, changes this switched voltage, and, export this output voltage.Moreover this power transfer module also comprises auxiliary transformer.This auxiliary transformer receives this commutating voltage, changes this commutating voltage, and exports control voltage, determines electric current/the determine voltage needed for voltage control unit to provide this.
Then, provide and determine electric current/determine voltage control unit, receive this dimming control signal, determine electric current or voltage (S30) is determined in light modulation to produce light modulation.Wherein, this integrated LED driving circuit to export this light modulation and determine electric current or voltage and this output voltage are determined in this light modulation, and then drives this LED light string.
Finally, this integrated LED driving circuit to export this light modulation and determine electric current or voltage and this output voltage are determined in this light modulation, and then drives this LED light string (S40).
In addition, the step of this method of operation also comprises provides rectification filtering unit.This rectification filtering unit receives this light modulation and determines electric current or voltage and this output voltage are determined in this light modulation, electric current or this light modulation are determined to this light modulation and determines the operation that voltage and this output voltage provide rectification and filtering, and outputting drive voltage, to drive this LED light string.
Be worth mentioning, this integrated LED driving circuit of this case with by this bidirectional power line communication unit, this power transfer module, this determines electric current/determine voltage control unit and this rectification filtering unit is integrated into modularization.That is brightness adjustment control system and the power supply system of this LED light string are integrated into modularization, power and the operation of light modulation to this LED light string to reach.More specifically, this dimming control signal is produced owing to utilizing this bidirectional power line communication unit, to realize dimming control function, therefore, by this bidirectional power line communication unit, there is this microcontroller, this optical coupler, this dim signal generator and this voltage quasi position transducer to change this alternating voltage, and export in the transfer process of this dimming control signal, directly can capture the specification voltage needed for dim signal.
In sum, the present invention has following feature & benefits:
1, by this bidirectional power line communication unit 102, this power transfer module 104, this determines electric current/determine voltage control unit 106 and this rectification filtering unit 108 is integrated into modularization, can reduced volume with take up room, and reduce cost;
2, this bidirectional power line communication unit 102 is provided, not only can realizes the function of two-way light modulation, and DALI brightness adjustment control interface or 0-10V brightness adjustment control interface can be saved; And
3, by voltage transitions that this bidirectional power line communication unit 102 in block configuration provides with this power transfer module 104, can directly capture required voltage swing, as the specification voltage needed for brightness adjustment control, so can save the circuit of multilevel voltage or signal conversion, to reduce the wastage, to improve conversion efficiency.
The above, be only detailed description and the accompanying drawing of the preferred specific embodiment of the present invention, feature of the present invention is not limited thereto, and be not used to limit the present invention, all scopes of the present invention should be as the criterion with patent requirements scope, and all embodiments according with the spirit change similar with it of the present patent application the scope of the claims, all should be contained in category of the present invention, anyly be familiar with this those skilled in the art in the field of the invention, can think easily and change or modify all can be encompassed in the scope of the claims of this case.
Claims (14)
1. an integrated LED driving circuit, is characterized in that,
For receiving alternating voltage, and change described alternating voltage to drive LED light string, described integrated LED driving circuit comprises:
Bidirectional power line communication unit, receives described alternating voltage, and changes the modulating signal on described alternating voltage, to produce dimming control signal;
Power transfer module, receives described alternating voltage, and changes described alternating voltage to produce output voltage; And
Determine electric current/determine voltage control unit, receive described dimming control signal, determine electric current or voltage is determined in light modulation to produce light modulation;
Wherein, described integrated LED driving circuit to export described light modulation and determine electric current or voltage and described output voltage are determined in described light modulation, and then drives described LED light string.
2. integrated LED driving circuit as claimed in claim 1, wherein said integrated LED driving circuit also comprises:
Rectification filtering unit, receive described light modulation and determine electric current or voltage and described output voltage are determined in described light modulation, electric current or described light modulation are determined to described light modulation and determines the operation that voltage and described output voltage provide rectification and filtering, and outputting drive voltage, to drive described LED light string.
3. integrated LED driving circuit as claimed in claim 1, wherein said bidirectional power line communication unit comprises:
Microcontroller, receives described alternating voltage to produce voltage signal, and receives changing voltage, to provide the voltage needed for described microcontroller;
Optical coupler, receives described voltage signal, and changes described voltage signal to export modulating signal; And
Dim signal generator, receives described modulating signal, to produce described dimming control signal.
4. integrated LED driving circuit as claimed in claim 3, wherein said power transfer module comprises:
Power filtering unit, receives the described alternating voltage that described microcontroller exports, to provide the operation of electromagnetic noise filtering to described alternating voltage, and output filtering voltage;
Full wave rectifying unit, receives described filtering voltage, described filtering voltage is provided to the operation of full-wave rectification, and exports commutating voltage;
Electrical source exchange unit, receives described commutating voltage, changes described commutating voltage, and output switching voltage; And
Main transformer, receives described switched voltage, changes described switched voltage, and, export described output voltage.
5. integrated LED driving circuit as claimed in claim 3, wherein said bidirectional power line communication unit also comprises:
Voltage quasi position transducer, to change the described supply power voltage determined electric current/determine voltage control unit and export, to provide the voltage needed for described dim signal generator.
6. integrated LED driving circuit as claimed in claim 4, wherein said power transfer module also comprises:
Auxiliary transformer, receives described commutating voltage, changes described commutating voltage, and exports control voltage, determines electric current/the determine voltage needed for voltage control unit to provide described.
7. integrated LED driving circuit as claimed in claim 2, wherein said bidirectional power line communication unit, described power transfer module, describedly determines electric current/determine voltage control unit and described rectification filtering unit is integrated in the same module.
8. a method of operation for integrated LED driving circuit, is characterized in that, comprising:
Described integrated LED driving circuit receives alternating voltage, and changes described alternating voltage to drive LED light string; The step of described method of operation comprises:
A () provides bidirectional power line communication unit, receive described alternating voltage, and changes the modulating signal on described alternating voltage, to produce dimming control signal;
B () provides power transfer module, receive described alternating voltage, and changes described alternating voltage to produce output voltage;
C () provides and determines electric current/determine voltage control unit, receive described dimming control signal, determines electric current or voltage is determined in light modulation to produce light modulation; And
D () described integrated LED driving circuit to export described light modulation and determine electric current or voltage and described output voltage are determined in described light modulation, and then drives described LED light string.
9. the method for operation of integrated LED driving circuit as claimed in claim 8, wherein also comprises:
(c ') rectification filtering unit is provided, receive described light modulation and determine electric current or voltage and described output voltage are determined in described light modulation, electric current or described light modulation are determined to described light modulation and determines the operation that voltage and described output voltage provide rectification and filtering, and outputting drive voltage, to drive described LED light string.
10. the method for operation of integrated LED driving circuit as claimed in claim 8, wherein said bidirectional power line communication unit comprises:
Microcontroller, receives described alternating voltage to produce voltage signal, and receives changing voltage, to provide the voltage needed for described microcontroller;
Optical coupler, receives described voltage signal, and changes described voltage signal to export modulating signal; And
Dim signal generator, receives described modulating signal, to produce described dimming control signal.
The method of operation of 11. integrated LED driving circuit as claimed in claim 8, wherein said power transfer module comprises:
Power filtering unit, receives the described alternating voltage that described microcontroller exports, to provide the operation of electromagnetic noise filtering to described alternating voltage, and output filtering voltage;
Full wave rectifying unit, receives described filtering voltage, described filtering voltage is provided to the operation of full-wave rectification, and exports commutating voltage;
Electrical source exchange unit, receives described commutating voltage, changes described commutating voltage, and output switching voltage; And
Main transformer, receives described switched voltage, changes described switched voltage, and, export described output voltage.
The method of operation of 12. integrated LED driving circuit as claimed in claim 10, wherein said bidirectional power line communication unit also comprises:
Voltage quasi position transducer, to change the described supply power voltage determined electric current/determine voltage control unit and export, to provide the voltage needed for described dim signal generator.
The method of operation of 13. integrated LED driving circuit as claimed in claim 11, wherein said power transfer module also comprises:
Auxiliary transformer, receives described commutating voltage, changes described commutating voltage, and exports control voltage, determines electric current/the determine voltage needed for voltage control unit to provide described.
The method of operation of 14. integrated LED driving circuit as claimed in claim 9, wherein said bidirectional power line communication unit, described power transfer module, describedly determines electric current/determine voltage control unit and described rectification filtering unit is integrated in the same module.
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| CN106604502A (en) * | 2016-12-12 | 2017-04-26 | 衡阳县海得利网络技术有限公司 | Infrared thru-beam vibration sensing street lamp |
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