CN108449837B - A kind of LED adjusting control circuit - Google Patents
A kind of LED adjusting control circuit Download PDFInfo
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- CN108449837B CN108449837B CN201810332112.5A CN201810332112A CN108449837B CN 108449837 B CN108449837 B CN 108449837B CN 201810332112 A CN201810332112 A CN 201810332112A CN 108449837 B CN108449837 B CN 108449837B
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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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- 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
- H05B45/34—Voltage stabilisation; Maintaining constant voltage
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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]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
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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
- H05B45/32—Pulse-control circuits
- H05B45/325—Pulse-width modulation [PWM]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The present invention relates to a kind of LED adjusting control circuits, in adjusting control circuit, pressure stabilizing source module outputting reference voltage VDD and voltage needed for light modulation to constant current source module；Pressure stabilizing source module outputting reference voltage VDD is to dim signal processing module；Constant current source module exports constant current to filter module；Dim signal input module exports original dim signal to filter module；Filter module exports filtered original dim signal to dim signal processing module；The original dim signal of dim signal processing module processing, exports direct current dim signal.Original dim signal includes resistance dim signal, voltage dim signal, PWM dim signal, and dim signal input module selects an output to filter module.By applying the present invention, same LED adjusting control circuit can export different types of dim signal as needed, structure is simple, good compatibility.
Description
Technical field
The present invention relates to field of LED drive, more specifically to a kind of LED adjusting control circuit.
Background technique
New type light source of the semiconductor lighting as 21 century has many advantages, such as that energy-saving and environmental protection, service life are long, easy to maintain.With big
Power high brightness LED (LED) replaces the conventional illumination sources such as incandescent lamp, fluorescent lamp to be trend of the times.Due to LED
Self-characteristic, it is necessary to constant-current source be used to power for it.In recent years, LED illumination shows developing state with rapid changepl. never-ending changes and improvements, especially
In dimmer application field, it also has, and brightness is persistently adjustable, light modulation speed is fast, light modulation depth is low, light modulation precision is high and is convenient for
The advantages of Digital Control, is even more widely used.
With the presence of LED switch power supply high and poor compatibility there are development cost due to using single light-dimming method ask
Topic, user can encounter many problems in installation and matching process, must such as buy corresponding light modulation device, make
With very inconvenient in the process, it is not able to satisfy the application demand of people
Summary of the invention
The technical problem to be solved in the present invention is that the above-mentioned LED switch power supply for the prior art exists because using single
One light-dimming method and have the defects that development cost is high and poor compatibility, a kind of LED adjusting control circuit is provided.
The technical solution adopted by the present invention to solve the technical problems is: constructing a kind of LED adjusting control circuit, including adjusts
Optical signal input module, filter module, pressure stabilizing source module, constant current source module and dim signal processing module；
The input terminal of the pressure stabilizing source module connects supply voltage VCC, described in the output end connection of the pressure stabilizing source module
Constant current source module, the pressure stabilizing source module outputting reference voltage VDD and voltage needed for light modulation to the constant current source module；It is described steady
Potential source module connects and exports the reference voltage VDD to the dim signal processing module；
The output end of the constant current source module connects and exports constant current to the filter module；
The dim signal input module connects and exports original dim signal to the filter module；The filter module
Output end connect the dim signal processing module, the filtered original dim signal is exported to the dim signal
Processing module；The dim signal processing module handles the original dim signal, exports direct current dim signal；
Wherein, the original dim signal includes resistance dim signal, voltage dim signal, PWM dim signal, the tune
Optical signal input module selects an output to the filter module.
Preferably, LED adjusting control circuit of the present invention further includes the output with the dim signal processing module
The dimming controlling module of connection is held, the pressure stabilizing source module connects and exports the reference voltage VDD to the brightness adjustment control mould
Block；
The dimming controlling module is used to provide a voltage bias when sampling photovoltage lower than setting dimmer voltage.
Preferably, LED adjusting control circuit of the present invention, the dimming controlling module include triode Q801, three
Pole pipe Q802, resistance R801, resistance R802, resistance R803, resistance R804；
The base stage of the triode Q801 connects the output end of the dim signal processing module by the resistance R801,
The base stage of the triode Q801 connects the emitter of the triode Q801, the triode Q801 by the resistance R802
Emitter ground connection, the collector of the triode Q801 connects the base stage of the triode Q802；
The base stage of the triode Q802 connects the triode Q802 with resistance R804 by the resistance R803 that connects
Emitter, the base stage of the triode Q802 connects the output end of the Voltage stabilizing module by the resistance R803, and receives
The reference voltage VDD；The collector of the triode Q802 connects the output end of the dim signal processing module.
Preferably, LED adjusting control circuit of the present invention further includes in the constant current source module and filter module
Between the first protective module, first protective module be used for prevent the original dim signal abnormal signal flow into described in
Constant current source module；
First protective module includes diode D601, and the anode of the diode D601 connects the constant current source module
Output end, the cathode of the diode D601 connects the input terminal of the filter module.
Preferably, the LED adjusting control circuit that the present invention states further includes the second protection mould connecting with the filter module
The output end of block, second protective module connects the supply voltage VCC；Second protective module is used for described original
Abnormal voltage is exported to the supply voltage VCC when dim signal exception, protects the dim signal processing module；
Second protective module includes diode D701, and the anode of the diode D701 connects the filter module
The cathode of output end, the diode D701 connects the supply voltage VCC.
Preferably, LED adjusting control circuit of the present invention, the dim signal input module include resistance input electricity
Road, voltage input circuit, PWM input circuit；
The resistance input circuit includes dimming resistor, and one end ground connection of the resistance input circuit, the other end connects institute
The output end for stating dim signal input module, for exporting the resistance dim signal；
One end of the voltage input circuit is grounded, and the other end connects the output end of the dim signal input module, is used
In the output voltage dim signal；
One end of the PWM input circuit is grounded, and the other end connects the output end of the dim signal input module, is used for
Export the PWM dim signal.
Preferably, LED adjusting control circuit of the present invention, the filter module include resistance R201 and capacitor
C201, one end of the resistance R201 are separately connected the output of the output end and constant current source module of the dim signal input module
End；The other end of the resistance R201 is grounded by the capacitor C201, and the other end of the resistance R201 connects the light modulation
The input terminal of signal processing module.
Preferably, LED adjusting control circuit of the present invention, the pressure stabilizing source module include benchmark voltage-stablizer U301,
Triode Q301, resistance R301, resistance R302, resistance R303, capacitor C301, capacitor C302；
The collector of the triode Q301 connects the supply voltage VCC, and the base stage of the triode Q301 passes through institute
State the collector that resistance R301 connects the triode Q301；
The first pin of the benchmark voltage-stablizer U301 is described by the capacitor C301 connection supply voltage VCC
The first pin of benchmark voltage-stablizer U301 connects the emitter of the triode Q301 by the capacitor C302, and the benchmark is steady
The first pin of depressor U301 is grounded；
The second pin of the benchmark voltage-stablizer U301 connects the base stage of the triode Q301；
The third pin of the benchmark voltage-stablizer U301 connects the transmitting of the triode Q301 by the resistance R302
Pole, the third pin of the benchmark voltage-stablizer U301 are drawn by first that the resistance R303 connects the benchmark voltage-stablizer U301
Foot.
Preferably, LED adjusting control circuit of the present invention, the constant current source module include operational amplifier U401,
Triode Q401, resistance R401, resistance R402, resistance R403, resistance R404；
The inverting input terminal of the operational amplifier U401 connects the defeated of the pressure stabilizing source module by the resistance R401
Outlet, the inverting input terminal of the operational amplifier U401 connect the emitter of the triode Q401；
The non-inverting input terminal of the operational amplifier U401 connects the defeated of the pressure stabilizing source module by the resistance R402
The non-inverting input terminal of outlet, the operational amplifier U401 is grounded by the resistance R403；
The positive pole of the operational amplifier U401 connects the pressure stabilizing source module, and receives the reference voltage VDD；
The power cathode of the operational amplifier U401 is grounded；
The output end of the operational amplifier U401 connects the base stage of the triode Q401, institute by the resistance R404
The collector for stating triode Q401 connects the filter module.
Preferably, LED adjusting control circuit of the present invention, the dim signal processing module includes operational amplifier
The non-inverting input terminal of U501 and resistance R501, the operational amplifier U501 connect the output end of the filter module, the fortune
The inverting input terminal for calculating amplifier U501 connects the output end of the operational amplifier U501；
The power cathode of the operational amplifier U501 is grounded, described in the positive pole connection of the operational amplifier U501
Pressure stabilizing source module, and receive the reference voltage VDD；
The output end of the operational amplifier U501 exports the direct current dim signal by the resistance R501.
Implement a kind of LED adjusting control circuit of the invention, has the advantages that in adjusting control circuit, institute
It states pressure stabilizing source module outputting reference voltage VDD and dims required voltage to the constant current source module；The pressure stabilizing source module output
The reference voltage VDD is to the dim signal processing module；The constant current source module exports constant current to the filtering mould
Block；The dim signal input module exports original dim signal to the filter module；The filter module will be filtered
The original dim signal is exported to the dim signal processing module；The dim signal processing module handles the original tune
Optical signal exports direct current dim signal.The original dim signal includes resistance dim signal, voltage dim signal, PWM light modulation
Signal, the dim signal input module select an output to the filter module.By applying the present invention, same LED light modulation control
Circuit processed can export different dim signals as needed, and structure is simple, good compatibility.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is a kind of structural schematic diagram of LED adjusting control circuit first embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of LED adjusting control circuit second embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram of LED adjusting control circuit 3rd embodiment of the present invention；
Fig. 4 is a kind of circuit diagram of LED adjusting control circuit 3rd embodiment of the present invention.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control attached drawing is described in detail
A specific embodiment of the invention.
Fig. 1 is a kind of structural schematic diagram of LED adjusting control circuit first embodiment of the present invention.
Specifically, the LED adjusting control circuit includes dim signal input module 101, filter module 102, source of stable pressure mould
Block 103, constant current source module 104 and dim signal processing module 105, wherein
The input terminal of pressure stabilizing source module 103 connects supply voltage VCC, and the output end of pressure stabilizing source module 103 connects constant-current source
Module 104,103 outputting reference voltage VDD of pressure stabilizing source module and voltage needed for light modulation to constant current source module 104.Pressure stabilizing source module
103 connections and outputting reference voltage VDD is to dim signal processing module 105.
The output end of constant current source module 104 connects and exports constant current to filter module 102.
Dim signal input module 101 connects and exports original dim signal to filter module 102；Filter module 102
Output end connects dim signal processing module 105, and filtered original dim signal is exported to dim signal processing module
105.Original dim signal includes resistance dim signal, voltage dim signal, PWM (Pulse Width Modulation, pulse
Width modulated) dim signal, dim signal input module 101 selects an output to filter module 102, i.e., original dim signal can be
Resistance dim signal or original dim signal can be voltage dim signal or original dim signal can be PWM dim signal.It is real
The present embodiment is applied, original dim signal, the compatible a variety of brightness adjustment control letters of dim signal input module 101 can be selected as needed
Number, to provide a variety of brightness adjustment control modes.
Dim signal processing module 105 handles original dim signal and reference voltage VDD, exports direct current dim signal.It adjusts
Optical signal prosessing module 105 obtains the original dim signal through filtering, dim signal processing module 105 from filter module 102
Signal Following effect is played, guarantees that input signal is identical with output signal type, while dim signal processing module 105 is used to incite somebody to action
The direct current dim signal of output is limited within the scope of safe voltage, and the output electricity of direct current dim signal is adjusted according to reference voltage
Pressure guarantees circuit safety.Preferably, when original dim signal is PWM dim signal, filter module 102 is to PWM dim signal
It is filtered, PWM dim signal is converted into direct current signal, then handled by dim signal processing module 105, finally exported
Direct current dim signal.
Fig. 2 is a kind of structural schematic diagram of LED adjusting control circuit second embodiment of the present invention.
On the basis of first embodiment, the LED adjusting control circuit of the present embodiment further includes being connected at dim signal
Manage module 105 output end dimming controlling module 108, pressure stabilizing source module 103 connection and outputting reference voltage VDD to dim control
Molding block 108.Dimming controlling module 108 dims electricity when sampling from the output end Sampled optical signals of dim signal processing module 105
It forces down when setting dimmer voltage, dimming controlling module 108 provides a voltage bias, to guarantee to dim minimum current.
Fig. 3 is a kind of structural schematic diagram of LED adjusting control circuit 3rd embodiment of the present invention.
On the basis of second embodiment, the LED adjusting control circuit of the present embodiment further includes in constant current source module 104
The first protective module 106 between filter module 102, the first protective module 106 are used to prevent the exception of original dim signal
Signal flows into constant-current source module 104, to protect constant current source module 104.
On the basis of second embodiment, the LED adjusting control circuit that the present embodiment is stated further includes connecting with filter module 102
The output end of the second protective module 107 connect, the second protective module 107 connects supply voltage VCC.Second protective module 107 is used
In exporting abnormal voltage to supply voltage VCC in the exception of original dim signal, dim signal processing module 105 is protected.
Fig. 4 is a kind of circuit diagram of LED adjusting control circuit 3rd embodiment of the present invention.
Alternatively, dim signal input module 101 includes resistance input circuit, voltage input electricity in 3rd embodiment
Road, PWM input circuit, wherein
A, resistance input circuit includes dimming resistor, one end ground connection of resistance input circuit, other end connection dim signal
The output end of input module 101 provides constant current by constant current source module 104, ratio-voltage is generated on dimming resistor, exports
Resistance dim signal.Dimming resistor can be selected fixed resistance or adjustable resistance, resistance value and can be set as needed.
B, voltage input circuit can produce voltage signal, one end ground connection of voltage input circuit, other end connection light modulation letter
The output end of number input module 101 is used for output voltage dim signal.
C, PWM input circuit can produce PWM (Pulse Width Modulation, pulse width modulation) signal, and PWM is defeated
Enter one end ground connection of circuit, the other end connects the output end of dim signal input module 101, for exporting PWM dim signal.
Alternatively, filter module 102 includes resistance R201 and capacitor C201, one end of resistance R201 in 3rd embodiment
It is separately connected the output end of dim signal input module 101 and the output end of constant current source module 104；The other end of resistance R201 is logical
Cross capacitor C201 ground connection, the input terminal of the other end connection dim signal processing module 105 of resistance R201.Resistance R201 and capacitor
PWM dim signal is converted to direct current signal by C201.
Alternatively, pressure stabilizing source module 103 includes benchmark voltage-stablizer U301, triode Q301, resistance in 3rd embodiment
R301, resistance R302, resistance R303, capacitor C301, capacitor C302.The collector of triode Q301 connects supply voltage VCC, and three
The base stage of pole pipe Q301 passes through the collector of resistance R301 connecting triode Q301；The first pin of benchmark voltage-stablizer U301 passes through
The first pin of capacitor C301 connection supply voltage VCC, benchmark voltage-stablizer U301 pass through capacitor C302 connecting triode Q301's
Emitter, the first pin ground connection of benchmark voltage-stablizer U301.The second pin connecting triode Q301's of benchmark voltage-stablizer U301
Base stage.The third pin of benchmark voltage-stablizer U301 passes through the emitter of resistance R302 connecting triode Q301, benchmark voltage-stablizer
The third pin of U301 passes through the first pin of resistance R303 connection benchmark voltage-stablizer U301.Wherein, by resistance R302, resistance
R303 and triode Q301 realizes precise and stable voltage output.
Alternatively, constant current source module 104 includes operational amplifier U401, triode Q401, resistance in 3rd embodiment
R401, resistance R402, resistance R403, resistance R404.The inverting input terminal of operational amplifier U401 is steady by resistance R401 connection
The output end of potential source module 103, the emitter of the inverting input terminal connecting triode Q401 of operational amplifier U401.Operation amplifier
The non-inverting input terminal of device U401 passes through the output end of resistance R402 connection pressure stabilizing source module 103, the same phase of operational amplifier U401
Input terminal is grounded by resistance R403.The positive pole of operational amplifier U401 connects pressure stabilizing source module 103, and receives benchmark electricity
Press VDD；The power cathode of operational amplifier U401 is grounded.The output end of operational amplifier U401 passes through three pole of resistance R404 connection
The collector of the base stage of pipe Q401, triode Q401 connects filter module 102.Wherein, resistance R402 and resistance R403 is partial pressure
Resistance, the non-inverting input terminal of the voltage input operational amplifier U401 after partial pressure；And then by operational amplifier U401, triode
Q401, resistance R401, resistance R404 provide required constant current when light modulation.
Alternatively, dim signal processing module 105 includes operational amplifier U501 and resistance R501 in 3rd embodiment,
The output end of the non-inverting input terminal connection filter module 102 of operational amplifier U501, the inverting input terminal of operational amplifier U501
Connect the output end of operational amplifier U501.The output end of operational amplifier U501 connects the defeated of dim signal processing module 105
Enter end, the output end of operational amplifier U501 passes through the output end of resistance R501 connection dim signal processing module 105.Operation is put
The power cathode ground connection of big device U501, the positive pole of operational amplifier U501 connect pressure stabilizing source module 103, and receive benchmark electricity
Press VDD.The non-inverting input terminal of operational amplifier U501 accept filter the transmission of module 102 through filtered original dim signal and
Constant current, so that operational amplifier U501 can be according to original light modulation in the original dim signal inputted in setting range
The variation of signal realizes dimming function to adjust the direct current dim signal of output.Further, operational amplifier U501 is combined
The reference voltage that pressure stabilizing source module 103 exports, the voltage of the direct current dim signal of output is limited in predetermined voltage range；I.e.
When the original dimming signal voltage that the non-inverting input terminal of operational amplifier U501 inputs is greater than the maximum value of predetermined voltage range,
Clamper is carried out to original dim signal according to reference voltage, to make the voltage of the direct current dim signal of output in predeterminated voltage model
In enclosing.It is appreciated that operational amplifier U501 can be to resistance dim signal, the voltage tune that dim signal input module 101 exports
Optical signal, PWM dim signal are limited.
Alternatively, the first protective module 106 includes diode D601 in 3rd embodiment, and the anode of diode D601 is even
Connect the output end of constant current source module 104, the input terminal of the cathode connection filter module 102 of diode D601.
Alternatively, the second protective module 107 includes diode D701 in 3rd embodiment, and the anode of diode D701 is even
The output end of filter module 102 is connect, the cathode of diode D701 connects supply voltage VCC.
Alternatively, dimming controlling module 108 includes triode Q801, triode Q802, resistance in 3rd embodiment
R801, resistance R802, resistance R803, resistance R804.The base stage of triode Q801 passes through resistance R801 connection filter module 102
Output end, the base stage of triode Q801 pass through the emitter of resistance R802 connecting triode Q801, the emitter of triode Q801
Ground connection, the base stage of the collector connecting triode Q802 of triode Q801.The base stage of triode Q802 passes through series resistance R803
Pass through the defeated of resistance R803 connection Voltage stabilizing module with the base stage of the emitter of resistance R804 connecting triode Q802, triode Q802
Outlet, and receive reference voltage VDD；The output end of the collector connection dim signal processing module 105 of triode Q802.Its
In, resistance R801 and resistance R802, when sampling dimmer voltage lower than setting dimmer voltage, pass through three for sampling dimmer voltage
Pole pipe Q801, triode Q802, resistance R803, resistance R804 provide a voltage bias, to guarantee to dim minimum current.
It is appreciated that removing the first protective module 106, second guarantor on the basis of the circuit diagram that 3rd embodiment provides
Module 107 and the corresponding circuit of dimming controlling module 108 are protected, the circuit diagram of first embodiment can be obtained.Similarly, in third
On the basis of the circuit diagram provided in embodiment, remove the first protective module 106 and the corresponding circuit of the second protective module 107,
The circuit diagram of second embodiment can be obtained.So the present invention is no longer superfluous to the circuit diagram of first embodiment and second embodiment
It states.In addition, circuit diagram of the invention is only the preferred embodiment of first embodiment, second embodiment, 3rd embodiment, according to
First embodiment, second embodiment, the principle of 3rd embodiment realize identical functions using other circuits, also belong to the present invention
Protection scope.
By applying the present invention, same LED adjusting control circuit can export different types of dim signal as needed, knot
Structure is simple, good compatibility, high reliablity, at low cost.
Above embodiments only technical concepts and features to illustrate the invention, its object is to allow person skilled in the art
Scholar can understand the contents of the present invention and implement accordingly, can not limit the scope of the invention.It is all to be wanted with right of the present invention
The equivalent changes and modifications that range is done are sought, should belong to the covering scope of the claims in the present invention.
Claims (10)
1. a kind of LED adjusting control circuit, which is characterized in that including dim signal input module (101), filter module (102),
Pressure stabilizing source module (103), constant current source module (104) and dim signal processing module (105)；
The input terminal of the pressure stabilizing source module (103) connects supply voltage VCC, and the output end of the pressure stabilizing source module (103) connects
Connect the constant current source module (104), pressure stabilizing source module (103) the outputting reference voltage VDD and voltage needed for dimming are to described
Constant current source module (104)；The pressure stabilizing source module (103) connects and exports at the reference voltage VDD to the dim signal
It manages module (105)；
The output end of the constant current source module (104) connects and exports constant current to the filter module (102)；
The dim signal input module (101) connects and exports original dim signal to the filter module (102)；The filter
The output end of wave module (102) connects the dim signal processing module (105), and the filtered original dim signal is defeated
Out to the dim signal processing module (105)；The dim signal processing module (105) handles the original dim signal,
Export direct current dim signal；
Wherein, the original dim signal includes resistance dim signal, voltage dim signal, PWM dim signal, the light modulation letter
Number input module (101) selects an output to the filter module (102).
2. LED adjusting control circuit according to claim 1, which is characterized in that further include and dim signal processing
The dimming controlling module (108) of the output end connection of module (105), the pressure stabilizing source module (103) connect and export the base
Quasi- voltage VDD is to the dimming controlling module (108)；
The dimming controlling module (108) is used to provide a voltage bias when sampling photovoltage lower than setting dimmer voltage.
3. LED adjusting control circuit according to claim 2, which is characterized in that the dimming controlling module (108) includes
Triode Q801, triode Q802, resistance R801, resistance R802, resistance R803, resistance R804；
The output that the base stage of the triode Q801 passes through the resistance R801 connection dim signal processing module (105)
End, the base stage of the triode Q801 connect the emitter of the triode Q801, the triode by the resistance R802
The emitter of Q801 is grounded, and the collector of the triode Q801 connects the base stage of the triode Q802；
The base stage of the triode Q802 connects the hair of the triode Q802 by the series connection resistance R803 with resistance R804
Emitter-base bandgap grading, the base stage of the triode Q802 connect the output end of the Voltage stabilizing module by the resistance R803, and described in reception
Reference voltage VDD；The collector of the triode Q802 connects the output end of the dim signal processing module (105).
4. LED adjusting control circuit according to claim 1, which is characterized in that further include in the constant current source module
(104) the first protective module (106) between filter module (102), first protective module (106) are described for preventing
The abnormal signal of original dim signal flows into the constant current source module (104)；
First protective module (106) includes diode D601, and the anode of the diode D601 connects the constant-current source mould
The output end of block (104), the cathode of the diode D601 connect the input terminal of the filter module (102).
5. the LED adjusting control circuit stated according to claim 1, which is characterized in that further include connecting with the filter module (102)
The output end of the second protective module (107) connect, second protective module (107) connects the supply voltage VCC；Described
Two protective modules (107) are used to export abnormal voltage to the supply voltage VCC in the original dim signal exception, protect
Protect the dim signal processing module (105)；
Second protective module (107) includes diode D701, and the anode of the diode D701 connects the filter module
(102) cathode of output end, the diode D701 connects the supply voltage VCC.
6. LED adjusting control circuit according to claim 1-5, which is characterized in that the dim signal input
Module (101) includes resistance input circuit, voltage input circuit, PWM input circuit；
The resistance input circuit includes dimming resistor, and one end ground connection of the resistance input circuit, the other end connects the tune
The output end of optical signal input module (101), for exporting the resistance dim signal；
One end of the voltage input circuit is grounded, and the other end connects the output end of the dim signal input module (101), is used
In the output voltage dim signal；
One end of the PWM input circuit is grounded, and the other end connects the output end of the dim signal input module (101), is used
In the output PWM dim signal.
7. LED adjusting control circuit according to claim 1-5, which is characterized in that the filter module (102)
Including resistance R201 and capacitor C201, one end of the resistance R201 is separately connected the dim signal input module (101)
The output end of output end and constant current source module (104)；The other end of the resistance R201 is grounded by the capacitor C201, described
The other end of resistance R201 connects the input terminal of the dim signal processing module (105).
8. LED adjusting control circuit according to claim 1-5, which is characterized in that the pressure stabilizing source module
It (103) include benchmark voltage-stablizer U301, triode Q301, resistance R301, resistance R302, resistance R303, capacitor C301, capacitor
C302；
The collector of the triode Q301 connects the supply voltage VCC, and the base stage of the triode Q301 passes through the electricity
Resistance R301 connects the collector of the triode Q301；
The first pin of the benchmark voltage-stablizer U301 passes through the capacitor C301 connection supply voltage VCC, the benchmark
The first pin of voltage-stablizer U301 connects the emitter of the triode Q301, the benchmark voltage-stablizer by the capacitor C302
The first pin of U301 is grounded；
The second pin of the benchmark voltage-stablizer U301 connects the base stage of the triode Q301；
The third pin of the benchmark voltage-stablizer U301 connects the emitter of the triode Q301, institute by the resistance R302
The third pin for stating benchmark voltage-stablizer U301 connects the first pin of the benchmark voltage-stablizer U301 by the resistance R303.
9. LED adjusting control circuit according to claim 1-5, which is characterized in that the constant current source module
It (104) include operational amplifier U401, triode Q401, resistance R401, resistance R402, resistance R403, resistance R404；
The inverting input terminal of the operational amplifier U401 is defeated by the resistance R401 connection pressure stabilizing source module (103)
Outlet, the inverting input terminal of the operational amplifier U401 connect the emitter of the triode Q401；
The non-inverting input terminal of the operational amplifier U401 is defeated by the resistance R402 connection pressure stabilizing source module (103)
The non-inverting input terminal of outlet, the operational amplifier U401 is grounded by the resistance R403；
The positive pole of the operational amplifier U401 connects the pressure stabilizing source module (103), and receives the reference voltage
VDD；The power cathode of the operational amplifier U401 is grounded；
The output end of the operational amplifier U401 connects the base stage of the triode Q401 by the resistance R404, and described three
The collector of pole pipe Q401 connects the filter module (102).
10. LED adjusting control circuit according to claim 1-5, which is characterized in that the dim signal processing
Module (105) includes described in the non-inverting input terminal connection of operational amplifier U501 and resistance R501, the operational amplifier U501
The output end of filter module (102), the inverting input terminal of the operational amplifier U501 connect the operational amplifier U501's
Output end；
The power cathode of the operational amplifier U501 is grounded, and the positive pole of the operational amplifier U501 connects the pressure stabilizing
Source module (103), and receive the reference voltage VDD；
The output end of the operational amplifier U501 exports the direct current dim signal by the resistance R501.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810332112.5A CN108449837B (en) | 2018-04-13 | 2018-04-13 | A kind of LED adjusting control circuit |
| PCT/CN2019/080859 WO2019196695A1 (en) | 2018-04-13 | 2019-04-01 | Led dimming control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810332112.5A CN108449837B (en) | 2018-04-13 | 2018-04-13 | A kind of LED adjusting control circuit |
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| Publication Number | Publication Date |
|---|---|
| CN108449837A CN108449837A (en) | 2018-08-24 |
| CN108449837B true CN108449837B (en) | 2019-08-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810332112.5A Active CN108449837B (en) | 2018-04-13 | 2018-04-13 | A kind of LED adjusting control circuit |
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| Country | Link |
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| CN (1) | CN108449837B (en) |
| WO (1) | WO2019196695A1 (en) |
Families Citing this family (6)
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|---|---|---|---|---|
| CN108449837B (en) * | 2018-04-13 | 2019-08-23 | 深圳市崧盛电子股份有限公司 | A kind of LED adjusting control circuit |
| CN110940878B (en) * | 2019-12-04 | 2021-10-15 | 唐山学院 | Automatic detection device for communication instrument |
| CN112333894B (en) * | 2020-10-29 | 2023-04-18 | 昂宝电子（上海）有限公司 | Dimming control circuit and method |
| CN112564724B (en) * | 2020-11-20 | 2022-11-29 | 浙江正泰仪器仪表有限责任公司 | MBUS host computer receiving circuit |
| CN113110669B (en) * | 2021-04-15 | 2022-09-02 | 常州易控汽车电子股份有限公司 | High-low side output constant current source system adopting PWM control and enable control |
| CN115734428A (en) * | 2022-12-28 | 2023-03-03 | 威海中远海运重工科技有限公司 | Constant-power stepless dimming control system |
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| JP3177245U (en) * | 2012-05-14 | 2012-07-26 | 佳赫科技有限公司 | LED lamp drive system for use in series-connected double tube rapid start ballast |
| EP2538541A1 (en) * | 2011-06-22 | 2012-12-26 | Electron Emporiki Kai Kataskeuastiki Ilektronikon Kai Ilektrikon Eidon Anonymi Viotechniki Kai Emporiki Etairia with d.t. "Electron A.V.E.E." | Method for stability and dimming of luminosity of lamps and illumination bodies having LED elements |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108449837B (en) * | 2018-04-13 | 2019-08-23 | 深圳市崧盛电子股份有限公司 | A kind of LED adjusting control circuit |
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2018
- 2018-04-13 CN CN201810332112.5A patent/CN108449837B/en active Active
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2019
- 2019-04-01 WO PCT/CN2019/080859 patent/WO2019196695A1/en active Application Filing
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| EP2538541A1 (en) * | 2011-06-22 | 2012-12-26 | Electron Emporiki Kai Kataskeuastiki Ilektronikon Kai Ilektrikon Eidon Anonymi Viotechniki Kai Emporiki Etairia with d.t. "Electron A.V.E.E." | Method for stability and dimming of luminosity of lamps and illumination bodies having LED elements |
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| CN208285590U (en) * | 2018-04-13 | 2018-12-25 | 深圳市崧盛电子股份有限公司 | A kind of LED adjusting control circuit |
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| Publication number | Publication date |
|---|---|
| WO2019196695A1 (en) | 2019-10-17 |
| CN108449837A (en) | 2018-08-24 |
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