CN105517245A - LED (Light-emitting Diode) constant current dimming power supply - Google Patents
LED (Light-emitting Diode) constant current dimming power supply Download PDFInfo
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- CN105517245A CN105517245A CN201610027497.5A CN201610027497A CN105517245A CN 105517245 A CN105517245 A CN 105517245A CN 201610027497 A CN201610027497 A CN 201610027497A CN 105517245 A CN105517245 A CN 105517245A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/395—Linear regulators
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
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Abstract
The invention belongs to the technical field of power supplies, and in particular relates to an LED (Light-emitting Diode) constant current dimming power supply, which comprises a DALI signal decoding module for decoding a DALI control signal; a signal conversion module for receiving a signal of the DALI signal decoding module and converting the signal; a square wave pulse signal conversion module for converting the signal converted by the signal conversion module into a group of square wave pulse signals changing according to control signals; an LED drive control module for receiving a square wave pulse signal of the square wave pulse signal conversion module; an external LED illuminating module for receiving a signal of the LED drive control module to realize dimming. Compared with the prior art, according to the LED constant current dimming power supply, the time-phased dimming can be realized, and a plurality of LED lights can be dimmed simultaneously, so that energy conservation and emission reduction can be realized; in addition, the output signals are correspondingly changed along with the requirements of the DALI control signals, so that the accuracy and the flexibility in dimming are improved.
Description
Technical field
The invention belongs to power technique fields, particularly relate to a kind of LED constant current dimming power source.
Background technology
In recent years, the present situation of energy scarcity makes people more recognize the importance of energy-saving and emission-reduction.LED conduct
novelhigh-performance solid light source, has the features such as energy-saving and environmental protection, the life-span is long, volume is little, is widely used in the high-power illumination such as road lighting, tunnel illumination occasion.
Current LED flat lamp drives constant current and constant voltage two kinds of modes, for this light source general significance of LED, adopts constant current mode to be conducive to its life-time dilatation.Because under constant voltage mode, once be changed by the electric current of LED, the temperature of the PN junction of LED will change to some extent, and this concerns the life-span of LED, and constant current driving will ensure can not be changed by the electric current of LED, also would not occur the PN junction variations in temperature of LED.
But, constant current LED power supplies of the prior art cannot realize intelligent dimming, light modulation at times can not be realized, can not realize carrying out light modulation to multiple lamp simultaneously, along with the continuous variation of lighting demand, need LED lamp to have different brightness under different scene, the type of drive that therefore existing firm power exports cannot be met the need of market.
In view of this, necessaryly provide a kind of LED constant current dimming power source, it can realize light modulation at times, and light modulation can be carried out to multiple LED simultaneously, thus can energy-saving and emission-reduction be realized, and output signal requires with DALI control signal and correspondingly changes, thus improve light modulation accuracy and flexibility.
Summary of the invention
The object of the invention is to: for the deficiencies in the prior art, and a kind of LED constant current dimming power source is provided, it can realize light modulation at times, and light modulation can be carried out to multiple LED simultaneously, thus can energy-saving and emission-reduction be realized, and output signal requires with DALI control signal and correspondingly changes, thus improve light modulation accuracy and flexibility.
To achieve these goals, the present invention adopts following technical scheme:
A kind of LED constant current dimming power source, comprising:
DALI(DigitalAddressableLightingInterface digital addressable lighting interface) signal decoding module, for decoding to DALI control signal;
Signal conversion module, receives the signal of DALI signal decoding module and changes it;
Square-wave pulse signal modular converter, is transformed into one group of square-wave pulse signal according to control signal change for the signal after signal conversion module being changed;
LED drive control module, for the square-wave pulse signal of recipient's wave pulse signal modular converter;
With external LED lighting module, receive the signal of LED drive control module, realize light modulation.
One as LED constant current dimming power source of the present invention is improved, described square-wave pulse signal modular converter comprises square-wave signal duty cycle control module, signal frequency control module and signal amplify output module, the input of described square-wave signal duty cycle control module is connected with the output of described signal conversion module and the input of described signal frequency control module respectively with output, the input that output and the described signal of described signal frequency control module amplify output module is connected, the output that described signal amplifies output module is connected with the input of described LED drive control module.
One as LED constant current dimming power source of the present invention is improved, and described power supply also comprises rectification filtering module, for converting electric main to high voltage direct current;
With DC/DC modular converter, for high voltage direct current is become some groups of low-voltages.
One as LED constant current dimming power source of the present invention is improved, described rectification filtering module comprises fuse F1, piezo-resistance TVR, inductance L w, electric capacity C1, electric capacity CY1, electric capacity CY2, inductance L 1, bridge rectifier filter BR, inductance L 2, resistance R3 and electric capacity C3, fuse F1 is connected with live wire, the two ends of piezo-resistance TVR are connected with fuse F1 and zero line respectively, the two ends of inductance L w are connected with the two ends of piezo-resistance TVR, the another two ends of inductance L w connect the two ends of electric capacity C1 respectively, pick after the one termination capacitor CY2 of electric capacity C1 shell, pick after a termination capacitor CY1 in the another two ends of inductance L w shell, the two ends of inductance L 1 connect the two ends of electric capacity C1 respectively, the another two ends of inductance L 1 are held with two AC of bridge rectifier filter BR and are connected, by electric capacity C3 ground connection after the A+ termination inductance L 2 of bridge rectifier filter BR, and inductance L 2 is connected with P pole, resistance R3 and inductance L 2 are connected in parallel, and the A-of bridge rectifier filter BR holds ground connection, and is connected with N pole.
One as LED constant current dimming power source of the present invention is improved, described DC/DC modular converter comprises chip U1, first pin of chip U1 and the second pin meet VCC after connecting resistance R12, resistance R14, diode D5, diode D12, resistance R21 successively, resistance R21 also connects ground connection after electric capacity C8, electric capacity C8 is parallel with electric capacity C1, resistance R12 is parallel with resistance R13, and resistance R12 and resistance R14 is all by electric capacity C4 ground connection, and resistance R21 is also connected with resistance R12 and resistance R10 by resistance R61;
3rd pin of chip U1 is ground connection after connecting resistance R9, electric capacity C10 successively, and the 3rd pin of chip U1 is also connected with resistance R12 by electric capacity C5, resistance R10 successively, electric capacity C5, resistance R10 ground connection;
4th pin of chip U1 is successively by ground connection after resistance R25, resistance R26, and resistance R26 and resistance R29 is connected in parallel;
5th pin of chip U1 connects ground connection after electric capacity C9, and the 5th pin of chip U1 also connects diode D12 and resistance R21 by resistance R23, and resistance R23 is connected with the primary coil of transformer T1;
The 6th pin ground connection of chip U1, and be connected with the N pole of rectification filtering module;
7th pin of chip U1 passes through the base stage of resistance R22 connecting triode Q1, resistance R22 is parallel with diode D7, resistance R22 is also connected with the primary coil of transformer T1 by the collector electrode of the emitter of resistance R57 connecting triode Q1, resistance R26, resistance R29 and resistance R25, triode Q1;
8th pin of chip U1 connects the P pole of rectification filtering module and the primary coil of transformer T1 after connecting resistance R16, resistance R15 successively, resistance R15 is also successively by the primary coil of electric capacity C3, diode D6 connection transformer T1, and electric capacity C3 is parallel with resistance R19 and resistance R20;
The secondary coil of transformer T1 is connected by diode D10 and VOUT, diode D10 also respectively by electric capacity C12 and electric capacity C30 ground connection, diode D10 and electric capacity C99 and resistance R242 downlink connection, appearance C99 and resistance R242 connects;
The secondary coil of transformer T1 also meets VCC by diode D9, resistance R50, resistance RL2 successively, resistance RL2 is also by electric capacity C18 ground connection, resistance RL2 is also connected with the collector electrode of triode Q2, resistance RL2 also connects the base stage of triode Q2 by resistance R45, resistance R45 is also by diode D20 ground connection, the emitter of triode Q2 is connected with VDD, and the emitter of triode Q2 is also by electric capacity C17 ground connection.
One as LED constant current dimming power source of the present invention is improved, described DALI signal decoding module installation is decoding chip, described signal conversion module is set to signal conversion chip, described square-wave signal duty cycle control module is set to Duty ratio control chip, described signal frequency control module is set to signal frequency control chip, and described signal amplifies output module and is set to signal amplification pio chip.
One as LED constant current dimming power source of the present invention is improved, and described LED drive control module comprises chip U2;
Ground connection after the first pin connection current detecting chip of chip U2, first pin of chip U2 is connected with the primary coil of transformer T2;
3rd pin of chip U2 meets VOUT, and the 3rd pin of chip U2 is also by diode D14, resistance R47 and resistance R51 ground connection;
5th pin of chip U2 is by diode D11 ground connection, and the 5th pin of chip U2 also connects the secondary coil of transformer T2 by inductance L 3, and inductance L 3 is connected with first pin of chip U2 by electric capacity C26;
6th pin of chip U2 connects signal by resistance R55 and amplifies pio chip, 6th pin of chip U2 is also by electric capacity C25 ground connection, electric capacity C25 is connected in parallel to resistance R34, and resistance R55 is by electric capacity C22 ground connection, and resistance R55 is also connected with the 7th pin of chip U2 by resistance R41;
7th pin of chip U2 is by electric capacity C24 ground connection, and electric capacity C24 is also connected with resistance R51;
The primary coil of transformer T2 is also held with V-and is connected, and the secondary coil of transformer T2 is also held with V+ and is connected, and is also connected with resistance R38 between V-end and V+ end.
One as LED constant current dimming power source of the present invention is improved, and described external LED lighting module comprises LED lamp bead, and described LED lamp bead is held with described V-respectively and V+ holds and is connected.
One as LED constant current dimming power source of the present invention is improved, and described LED lamp bead is set to several, and described in several, LED lamp bead is connected in series.
One as LED constant current dimming power source of the present invention is improved, the model of described decoding chip is CTT-DLPWM-8, the model of described signal conversion chip is AD0809, the model of described Duty ratio control chip is 8253, the model of described signal frequency control chip is AD9832, and the model that described signal amplifies pio chip is A7700.
Operation principle of the present invention is:
Electric main exports 310V direct voltage after the filtering--direct current--filtering of rectification filtering module; By DC/DC voltage transformation module, direct current 310V high pressure is become 3 groups of low-voltages: the first via is to chip U1(VCC) power supply; Second tunnel powers (VDD) to dimming controlling module DL01; Chip U2(VOUT is exported on 3rd tunnel) power supply, power to LED after filtering, signal controlling.
Wherein, dimming controlling module DL01 comprises signal decoding, conversion, dimming controlling module etc.Hold the DALI control signal of input after MCU signal decoding from DA/DC, DA/GD, code signal is converted on request to duty ratio with the variable digital square-wave of control signal, and according to the frequency of dimming characteristic setting square-wave signal, through signal amplification circuit signal amplified and export, and then the output current of control chip U2 and voltage, the brightness size of final realization to light carries out Based Intelligent Control, thus plays the effect of energy-saving and environmental protection and reduction of discharging.
Relative to prior art, DALI control signal is converted to one group of square-wave pulse signal according to control signal change by the present invention, realize the electric current of LED driving governor and the control of voltage, and, output signal requires corresponding change with DALI control signal, thus improve light modulation accuracy and flexibility, can realize light modulation at times, and can light modulation be carried out to multiple LED simultaneously and then realize the Based Intelligent Control of light, realize energy-saving and emission-reduction and promote environmental protection.
Accompanying drawing explanation
Below in conjunction with specification
accompanying drawingand embodiment, the present invention and Advantageous Effects thereof are described in detail, wherein:
fig. 1for structural frames of the present invention
figure.
fig. 2for the circuit of rectification filtering module in the present invention
figure.
fig. 3for the circuit of DC/DC modular converter in the present invention
figure.
Fig. 4 is the electrical block diagram of major part of the present invention.
Embodiment
Below in conjunction with embodiment and specification
accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
as Fig. 1 to 4shown in, a kind of LED constant current dimming power source provided by the invention, is characterized in that, comprising:
DALI signal decoding module 1, for decoding to DALI control signal;
Signal conversion module 2, receives the signal of DALI signal decoding module 1 and changes it;
Square-wave pulse signal modular converter 3, is transformed into one group of square-wave pulse signal according to control signal change for the signal after signal conversion module 2 being changed;
LED drive control module 4, for the square-wave pulse signal of recipient's wave pulse signal modular converter 3;
With external LED lighting module 5, receive the signal of LED drive control module 4, realize light modulation.
Wherein, square-wave pulse signal modular converter 3 comprises square-wave signal duty cycle control module 31, signal frequency control module 32 and signal and amplifies output module 33, the input of square-wave signal duty cycle control module 31 is connected with the output of signal conversion module 2 and the input of signal frequency control module 32 respectively with output, the input that output and the signal of signal frequency control module 32 amplify output module 33 is connected, and the output that signal amplifies output module 33 is connected with the input of LED drive control module 4.Wherein, square-wave signal duty cycle control module 31 according to the requirement of DALI control signal, can produce square-wave signal and makes variable duty ratio, then exports and controls light.So, just light modulation can be carried out at times.
Power supply also comprises rectification filtering module 6, for converting electric main to high voltage direct current;
With DC/DC modular converter 7, for high voltage direct current is become some groups of low-voltages.
Rectification filtering module 6 comprises fuse F1, piezo-resistance TVR, inductance L w, electric capacity C1, electric capacity CY1, electric capacity CY2, inductance L 1, bridge rectifier filter BR, inductance L 2, resistance R3 and electric capacity C3, fuse F1 is connected with live wire, the two ends of piezo-resistance TVR are connected with fuse F1 and zero line respectively, the two ends of inductance L w are connected with the two ends of piezo-resistance TVR, the another two ends of inductance L w connect the two ends of electric capacity C1 respectively, pick after the one termination capacitor CY2 of electric capacity C1 shell, pick after a termination capacitor CY1 in the another two ends of inductance L w shell, the two ends of inductance L 1 connect the two ends of electric capacity C1 respectively, the another two ends of inductance L 1 are held with two AC of bridge rectifier filter BR and are connected, by electric capacity C3 ground connection after the A+ termination inductance L 2 of bridge rectifier filter BR, and inductance L 2 is connected with P pole, resistance R3 and inductance L 2 are connected in parallel, and the A-of bridge rectifier filter BR holds ground connection, and is connected with N pole.
DC/DC modular converter 7 comprises chip U1, first pin of chip U1 and the second pin meet VCC after connecting resistance R12, resistance R14, diode D5, diode D12, resistance R21 successively, resistance R21 also connects ground connection after electric capacity C8, electric capacity C8 is parallel with electric capacity C1, resistance R12 is parallel with resistance R13, resistance R12 and resistance R14 is all by electric capacity C4 ground connection, and resistance R21 is also connected with resistance R12 and resistance R10 by resistance R61;
3rd pin of chip U1 is ground connection after connecting resistance R9, electric capacity C10 successively, and the 3rd pin of chip U1 is also connected with resistance R12 by electric capacity C5, resistance R10 successively, electric capacity C5, resistance R10 ground connection;
4th pin of chip U1 is successively by ground connection after resistance R25, resistance R26, and resistance R26 and resistance R29 is connected in parallel;
5th pin of chip U1 connects ground connection after electric capacity C9, and the 5th pin of chip U1 also connects diode D12 and resistance R21 by resistance R23, and resistance R23 is connected with the primary coil of transformer T1;
The 6th pin ground connection of chip U1, and be connected with the N pole of rectification filtering module;
7th pin of chip U1 passes through the base stage of resistance R22 connecting triode Q1, resistance R22 is parallel with diode D7, resistance R22 is also connected with the primary coil of transformer T1 by the collector electrode of the emitter of resistance R57 connecting triode Q1, resistance R26, resistance R29 and resistance R25, triode Q1;
8th pin of chip U1 connects the P pole of rectification filtering module and the primary coil of transformer T1 after connecting resistance R16, resistance R15 successively, resistance R15 is also successively by the primary coil of electric capacity C3, diode D6 connection transformer T1, and electric capacity C3 is parallel with resistance R19 and resistance R20;
The secondary coil of transformer T1 is connected by diode D10 and VOUT, diode D10 also respectively by electric capacity C12 and electric capacity C30 ground connection, diode D10 and electric capacity C99 and resistance R242 downlink connection, appearance C99 and resistance R242 connects;
The secondary coil of transformer T1 also meets VCC by diode D9, resistance R50, resistance RL2 successively, resistance RL2 is also by electric capacity C18 ground connection, resistance RL2 is also connected with the collector electrode of triode Q2, resistance RL2 also connects the base stage of triode Q2 by resistance R45, resistance R45 is also by diode D20 ground connection, the emitter of triode Q2 is connected with VDD, and the emitter of triode Q2 is also by electric capacity C17 ground connection.
DALI signal decoding module 1 is set to decoding chip, signal conversion module 2 is set to signal conversion chip, square-wave signal duty cycle control module 31 is set to Duty ratio control chip, signal frequency control module 32 is set to signal frequency control chip, and signal amplifies output module 33 and is set to signal amplification pio chip.In the present embodiment, these integrated chips are (DL01) inside same MCU,
as Fig. 4frame
figure instituteshow.
LED drive control module 4 comprises chip U2;
Ground connection after the first pin connection current detecting chip of chip U2, first pin of chip U2 is connected with the primary coil of transformer T2;
3rd pin of chip U2 meets VOUT, and the 3rd pin of chip U2 is also by diode D14, resistance R47 and resistance R51 ground connection;
5th pin of chip U2 is by diode D11 ground connection, and the 5th pin of chip U2 also connects the secondary coil of transformer T2 by inductance L 3, and inductance L 3 is connected with first pin of chip U2 by electric capacity C26;
6th pin of chip U2 connects signal by resistance R55 and amplifies pio chip, 6th pin of chip U2 is also by electric capacity C25 ground connection, electric capacity C25 is connected in parallel to resistance R34, and resistance R55 is by electric capacity C22 ground connection, and resistance R55 is also connected with the 7th pin of chip U2 by resistance R41;
7th pin of chip U2 is by electric capacity C24 ground connection, and electric capacity C24 is also connected with resistance R51;
The primary coil of transformer T2 is also held with V-and is connected, and the secondary coil of transformer T2 is also held with V+ and is connected, and is also connected with resistance R38 between V-end and V+ end.LED is controlled by the power transfer of control U2.
External LED lighting module 5 comprises LED lamp bead, and LED lamp bead is held with V-respectively and V+ holds and is connected.
LED lamp bead is set to several, and several LED lamp bead are connected in series, and so just can control the brightness of multiple LED lamp bead simultaneously.
The model of decoding chip is CTT-DLPWM-8, and the model of signal conversion chip is AD0809, and the model of Duty ratio control chip is 8253, and the model of signal frequency control chip is AD9832, and the model that signal amplifies pio chip is A7700.
Operation principle of the present invention is:
Electric main exports 310V direct voltage after the filtering--direct current--filtering of rectification filtering module 6; By DC/DC voltage transformation module 7, direct current 310V high pressure is become 3 groups of low-voltages: the first via is to chip U1(VCC) power supply; Second tunnel powers (VDD) to dimming controlling module DL01; Chip U2(VOUT is exported on 3rd tunnel) power supply, then power to LED after filtering, signal controlling.
Wherein, dimming controlling module (MCU) DL01 comprises signal decoding, conversion, dimming controlling module etc.Hold the DALI control signal of input after MCU signal decoding from DA/DC, DA/GD, code signal is converted on request to duty ratio with the variable digital square-wave of control signal, and according to the frequency of dimming characteristic setting square-wave signal, through signal amplification circuit signal amplified and export, and then the output current of control chip U2 and voltage, the brightness size of final realization to light carries out Based Intelligent Control, thus plays the effect of energy-saving and environmental protection and reduction of discharging.
DALI control signal is converted to one group of square-wave pulse signal according to control signal change by the present invention, realize the electric current of LED driving governor and the control of voltage, and, output signal requires corresponding change with DALI control signal, thus improve light modulation accuracy and flexibility, light modulation at times can be realized, and can light modulation be carried out to multiple LED simultaneously and then realize the Based Intelligent Control of light, realize energy-saving and emission-reduction and promote environmental protection.
The announcement of book and instruction according to the above description, those skilled in the art in the invention can also change above-mentioned execution mode and revise.Therefore, the present invention is not limited to embodiment disclosed and described above, also should fall in the protection range of claim of the present invention modifications and changes more of the present invention.In addition, although employ some specific terms in this specification, these terms just for convenience of description, do not form any restriction to the present invention.
Claims (10)
1. a LED constant current dimming power source, is characterized in that, comprising:
DALI signal decoding module, for decoding to DALI control signal;
Signal conversion module, receives the signal of DALI signal decoding module and changes it;
Square-wave pulse signal modular converter, is transformed into one group of square-wave pulse signal according to control signal change for the signal after signal conversion module being changed;
LED drive control module, for the square-wave pulse signal of recipient's wave pulse signal modular converter;
With external LED lighting module, receive the signal of LED drive control module, realize light modulation.
2. LED constant current dimming power source according to claim 1, it is characterized in that: described square-wave pulse signal modular converter comprises square-wave signal duty cycle control module, signal frequency control module and signal amplify output module, the input of described square-wave signal duty cycle control module is connected with the output of described signal conversion module and the input of described signal frequency control module respectively with output, the input that output and the described signal of described signal frequency control module amplify output module is connected, the output that described signal amplifies output module is connected with the input of described LED drive control module.
3. LED constant current dimming power source according to claim 1, is characterized in that: described power supply also comprises rectification filtering module, for converting electric main to high voltage direct current;
With DC/DC modular converter, for high voltage direct current is become some groups of low-voltages.
4. LED constant current dimming power source according to claim 3, it is characterized in that: described rectification filtering module comprises fuse F1, piezo-resistance TVR, inductance L w, electric capacity C1, electric capacity CY1, electric capacity CY2, inductance L 1, bridge rectifier filter BR, inductance L 2, resistance R3 and electric capacity C3, fuse F1 is connected with live wire, the two ends of piezo-resistance TVR are connected with fuse F1 and zero line respectively, the two ends of inductance L w are connected with the two ends of piezo-resistance TVR, the another two ends of inductance L w connect the two ends of electric capacity C1 respectively, pick after the one termination capacitor CY2 of electric capacity C1 shell, pick after a termination capacitor CY1 in the another two ends of inductance L w shell, the two ends of inductance L 1 connect the two ends of electric capacity C1 respectively, the another two ends of inductance L 1 are held with two AC of bridge rectifier filter BR and are connected, by electric capacity C3 ground connection after the A+ termination inductance L 2 of bridge rectifier filter BR, and inductance L 2 is connected with P pole, resistance R3 and inductance L 2 are connected in parallel, and the A-of bridge rectifier filter BR holds ground connection, and is connected with N pole.
5. LED constant current dimming power source according to claim 4, it is characterized in that: described DC/DC modular converter comprises chip U1, first pin of chip U1 and the second pin meet VCC after connecting resistance R12, resistance R14, diode D5, diode D12, resistance R21 successively, resistance R21 also connects ground connection after electric capacity C8, electric capacity C8 is parallel with electric capacity C1, resistance R12 is parallel with resistance R13, resistance R12 and resistance R14 is all by electric capacity C4 ground connection, and resistance R21 is also connected with resistance R12 and resistance R10 by resistance R61;
3rd pin of chip U1 is ground connection after connecting resistance R9, electric capacity C10 successively, and the 3rd pin of chip U1 is also connected with resistance R12 by electric capacity C5, resistance R10 successively, electric capacity C5, resistance R10 ground connection;
4th pin of chip U1 is successively by ground connection after resistance R25, resistance R26, and resistance R26 and resistance R29 is connected in parallel;
5th pin of chip U1 connects ground connection after electric capacity C9, and the 5th pin of chip U1 also connects diode D12 and resistance R21 by resistance R23, and resistance R23 is connected with the primary coil of transformer T1;
The 6th pin ground connection of chip U1, and be connected with the N pole of rectification filtering module;
7th pin of chip U1 passes through the base stage of resistance R22 connecting triode Q1, resistance R22 is parallel with diode D7, resistance R22 is also connected with the primary coil of transformer T1 by the collector electrode of the emitter of resistance R57 connecting triode Q1, resistance R26, resistance R29 and resistance R25, triode Q1;
8th pin of chip U1 connects the P pole of rectification filtering module and the primary coil of transformer T1 after connecting resistance R16, resistance R15 successively, resistance R15 is also successively by the primary coil of electric capacity C3, diode D6 connection transformer T1, and electric capacity C3 is parallel with resistance R19 and resistance R20;
The secondary coil of transformer T1 is connected by diode D10 and VOUT, diode D10 also respectively by electric capacity C12 and electric capacity C30 ground connection, diode D10 and electric capacity C99 and resistance R242 downlink connection, appearance C99 and resistance R242 connects;
The secondary coil of transformer T1 also meets VCC by diode D9, resistance R50, resistance RL2 successively, resistance RL2 is also by electric capacity C18 ground connection, resistance RL2 is also connected with the collector electrode of triode Q2, resistance RL2 also connects the base stage of triode Q2 by resistance R45, resistance R45 is also by diode D20 ground connection, the emitter of triode Q2 is connected with VDD, and the emitter of triode Q2 is also by electric capacity C17 ground connection.
6. LED constant current dimming power source according to claim 2, it is characterized in that: described DALI signal decoding module installation is decoding chip, described signal conversion module is set to signal conversion chip, described square-wave signal duty cycle control module is set to Duty ratio control chip, described signal frequency control module is set to signal frequency control chip, and described signal amplifies output module and is set to signal amplification pio chip.
7. LED constant current dimming power source according to claim 6, is characterized in that: described LED drive control module comprises chip U2;
Ground connection after the first pin connection current detecting chip of chip U2, first pin of chip U2 is connected with the primary coil of transformer T2;
3rd pin of chip U2 meets VOUT, and the 3rd pin of chip U2 is also by diode D14, resistance R47 and resistance R51 ground connection;
5th pin of chip U2 is by diode D11 ground connection, and the 5th pin of chip U2 also connects the secondary coil of transformer T2 by inductance L 3, and inductance L 3 is connected with first pin of chip U2 by electric capacity C26;
6th pin of chip U2 connects signal by resistance R55 and amplifies pio chip, 6th pin of chip U2 is also by electric capacity C25 ground connection, electric capacity C25 is connected in parallel to resistance R34, and resistance R55 is by electric capacity C22 ground connection, and resistance R55 is also connected with the 7th pin of chip U2 by resistance R41;
7th pin of chip U2 is by electric capacity C24 ground connection, and electric capacity C24 is also connected with resistance R51;
The primary coil of transformer T2 is also held with V-and is connected, and the secondary coil of transformer T2 is also held with V+ and is connected, and is also connected with resistance R38 between V-end and V+ end.
8. LED constant current dimming power source according to claim 7, is characterized in that: described external LED lighting module comprises LED lamp bead, and described LED lamp bead is held with described V-respectively and V+ holds and is connected.
9. LED constant current dimming power source according to claim 8, is characterized in that: described LED lamp bead is set to several, and described in several, LED lamp bead is connected in series.
10. LED constant current dimming power source according to claim 6, it is characterized in that: the model of described decoding chip is CTT-DLPWM-8, the model of described signal conversion chip is AD0809, the model of described Duty ratio control chip is 8253, the model of described signal frequency control chip is AD9832, and the model that described signal amplifies pio chip is A7700.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610027497.5A CN105517245A (en) | 2016-01-14 | 2016-01-14 | LED (Light-emitting Diode) constant current dimming power supply |
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| CN201610027497.5A CN105517245A (en) | 2016-01-14 | 2016-01-14 | LED (Light-emitting Diode) constant current dimming power supply |
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| CN105517245A true CN105517245A (en) | 2016-04-20 |
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| CN (1) | CN105517245A (en) |
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| CN107071987A (en) * | 2017-06-16 | 2017-08-18 | 无锡卡乐芯科技有限公司 | A kind of pair of pin three-color light-emitting diode and lamp string |
| CN107071957A (en) * | 2016-12-28 | 2017-08-18 | 惠州Tcl照明电器有限公司 | LED light modulating devices and system based on encoded signal |
| CN109922566A (en) * | 2019-03-04 | 2019-06-21 | 深圳民爆光电技术有限公司 | Intelligent dimming LED drive device and LED light control system |
| CN110475407A (en) * | 2019-08-28 | 2019-11-19 | 深圳市帝狼光电有限公司 | A kind of LED desk lamp control circuit |
| CN113966025A (en) * | 2021-10-26 | 2022-01-21 | 深圳市紫光照明技术股份有限公司 | Dimming method, dimming controller and dimming control system |
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| CN107071957A (en) * | 2016-12-28 | 2017-08-18 | 惠州Tcl照明电器有限公司 | LED light modulating devices and system based on encoded signal |
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| CN107071987B (en) * | 2017-06-16 | 2018-11-20 | 无锡卡乐芯科技有限公司 | A kind of double pin three-color light-emitting diodes and lamp string |
| CN109922566A (en) * | 2019-03-04 | 2019-06-21 | 深圳民爆光电技术有限公司 | Intelligent dimming LED drive device and LED light control system |
| CN109922566B (en) * | 2019-03-04 | 2024-01-12 | 深圳民爆光电股份有限公司 | Intelligent dimming LED driving device and LED lamp control system |
| CN110475407A (en) * | 2019-08-28 | 2019-11-19 | 深圳市帝狼光电有限公司 | A kind of LED desk lamp control circuit |
| CN113966025A (en) * | 2021-10-26 | 2022-01-21 | 深圳市紫光照明技术股份有限公司 | Dimming method, dimming controller and dimming control system |
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