CN108449837A - A kind of LED adjusting control circuits - Google Patents
A kind of LED adjusting control circuits Download PDFInfo
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- CN108449837A CN108449837A CN201810332112.5A CN201810332112A CN108449837A CN 108449837 A CN108449837 A CN 108449837A CN 201810332112 A CN201810332112 A CN 201810332112A CN 108449837 A CN108449837 A CN 108449837A
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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]
-
- 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, voltage stabilizing source module output reference voltage VDD and voltage needed for light modulation to constant current source module；Voltage stabilizing source module output 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 signals, and dim signal input module selects an output to filter module.By applying the present invention, same LED adjusting control circuits can export different types of dim signal, simple in structure, good compatibility as needed.
Description
Technical field
The present invention relates to field of LED drive, more specifically to a kind of LED adjusting control circuits.
Background technology
New type light source of the semiconductor lighting as 21 century, has many advantages, such as energy-saving and environmental protection, long lifespan, easy care.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 continues with brightness, and 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, the application demand of people cannot be met
Invention content
The technical problem to be solved in the present invention is exist because using single for the above-mentioned LED switch power supply of the prior art
One light-dimming method and high there are development cost and poor compatibility defect, provide a kind of LED adjusting control circuits.
The technical solution adopted by the present invention to solve the technical problems is：A kind of LED adjusting control circuits are constructed, including are adjusted
Optical signal input module, filter module, voltage stabilizing source module, constant current source module and dim signal processing module；
The input terminal of the voltage stabilizing source module connects supply voltage VCC, described in the output end connection of the voltage stabilizing source module
Constant current source module, the voltage stabilizing source module output 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 V DD 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 signals, the tune
Optical signal input module selects an output to the filter module.
Preferably, LED adjusting control circuits of the present invention further include the output with the dim signal processing module
The dimming controlling module of connection, the voltage stabilizing source module is held to connect and export the reference voltage V DD to the brightness adjustment control mould
Block；
The dimming controlling module is used to, when sampling photovoltage less than setting dimmer voltage, provide a voltage bias.
Preferably, LED adjusting control circuits 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 V DD；The collector of the triode Q802 connects the output end of the dim signal processing module.
Preferably, LED adjusting control circuits of the present invention further include being in the constant current source module and filter module
Between the first protection module, first protection module be used for prevent the original dim signal abnormal signal flow into described in
Constant current source module；
First protection 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 circuits that the present invention states further include the second protection mould being connect with the filter module
The output end of block, second protection module connects the supply voltage VCC；Second protection 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 protection 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 circuits of the present invention, the dim signal input module include resistance input electricity
Road, voltage input circuit, PWM input circuits；
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 circuits is grounded, and the other end connects the output end of the dim signal input module, is used for
Export the PWM dim signals.
Preferably, LED adjusting control circuits of the present invention, the filter module include resistance R201 and capacitance
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 capacitance C201, and the other end of the resistance R201 connects the light modulation
The input terminal of signal processing module.
Preferably, LED adjusting control circuits of the present invention, the voltage stabilizing source module include benchmark voltage-stablizer U301,
Triode Q301, resistance R301, resistance R302, resistance R303, capacitance C301, capacitance 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 capacitance C301 connections supply voltage VCC
The first pin of benchmark voltage-stablizer U301 connects the emitter of the triode Q301 by the capacitance 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 circuits 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 of the operational amplifier U401 connects the defeated of the voltage stabilizing source module by the resistance R401
Outlet, the inverting input of the operational amplifier U401 connect the emitter of the triode Q401；
The in-phase input end of the operational amplifier U401 connects the defeated of the voltage stabilizing source module by the resistance R402
The in-phase input end of outlet, the operational amplifier U401 is grounded by the resistance R403；
The positive pole of the operational amplifier U401 connects the voltage stabilizing source module, and receives the reference voltage V DD；
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 circuits of the present invention, the dim signal processing module includes operational amplifier
The in-phase input end of U501 and resistance R501, the operational amplifier U501 connect the output end of the filter module, the fortune
The inverting input 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
Voltage stabilizing source module, and receive the reference voltage V DD；
The output end of the operational amplifier U501 exports the direct current dim signal by the resistance R501.
A kind of LED adjusting control circuits for implementing the present invention, have the advantages that：In adjusting control circuit, institute
Voltage needed for voltage stabilizing source module output reference voltage VDD and light modulation is stated to the constant current source module；The voltage stabilizing source module output
The reference voltage V DD 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 modulations
Signal, the dim signal input module select an output to the filter module.By applying the present invention, same LED light modulations control
Circuit processed can export different dim signals, simple in structure, good compatibility as needed.
Description of the drawings
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 circuits first embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of LED adjusting control circuits second embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram of LED adjusting control circuits 3rd embodiment of the present invention；
Fig. 4 is a kind of circuit diagram of LED adjusting control circuits 3rd embodiment of the present invention.
Specific implementation mode
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control attached drawing is described in detail
The specific implementation mode of the present invention.
Fig. 1 is a kind of structural schematic diagram of LED adjusting control circuits first embodiment of the present invention.
Specifically, the LED adjusting control circuits include 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 voltage stabilizing source module 103 connects supply voltage VCC, and the output end of voltage stabilizing source module 103 connects constant-current source
Module 104,103 output reference voltage VDD of voltage stabilizing source module and voltage needed for light modulation to constant current source module 104.Voltage stabilizing source module
103 connections and output 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 signals.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 V DD, exports direct current dim signal.It adjusts
Optical signal prosessing module 105 obtains filtered original dim signal, dim signal processing module 105 from filter module 102
Signal Following effect is played, ensures 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 ensures circuit safety.Preferably, when original dim signal is PWM dim signals, filter module 102 is to PWM dim signals
It is filtered, PWM dim signals 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 circuits second embodiment of the present invention.
On the basis of first embodiment, the LED adjusting control circuits of the present embodiment further include being connected at dim signal
Manage module 105 output end dimming controlling module 108, voltage stabilizing source module 103 connection and output reference voltage VDD to dim control
Molding block 108.Dimming controlling module 108 dims electricity from the output end Sampled optical signals of dim signal processing module 105 when sampling
It forces down when setting dimmer voltage, dimming controlling module 108 provides a voltage bias, to ensure to dim minimum current.
Fig. 3 is a kind of structural schematic diagram of LED adjusting control circuits 3rd embodiment of the present invention.
On the basis of second embodiment, the LED adjusting control circuits of the present embodiment further include being in constant current source module 104
The first protection module 106 between filter module 102, the first protection 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 circuits that the present embodiment is stated further include connecting with filter module 102
The second protection module 107 connect, the output end connection supply voltage VCC of the second protection module 107.Second protection 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 circuits 3rd embodiment of the present invention.
Alternatively, dim signal input module 101 includes resistance input circuit, control source electricity in 3rd embodiment
Road, PWM input circuits, 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 generate 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 circuits can generate 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 signals.
Alternatively, filter module 102 includes resistance R201 and capacitance C201, one end of resistance R201 in 3rd embodiment
It is separately connected the output end of the output end and constant current source module 104 of dim signal input module 101；The other end of resistance R201 is logical
Cross capacitance C201 ground connection, the input terminal of the other end connection dim signal processing module 105 of resistance R201.Resistance R201 and capacitance
PWM dim signals are converted to direct current signal by C201.
Alternatively, voltage stabilizing source module 103 includes benchmark voltage-stablizer U301, triode Q301, resistance in 3rd embodiment
R301, resistance R302, resistance R303, capacitance C301, capacitance C302.The collector connection supply voltage VCC of triode Q301, three
The collector that the base stage of pole pipe Q301 passes through resistance R301 connecting triodes Q301；The first pin of benchmark voltage-stablizer U301 passes through
The first pin of capacitance C301 connection supply voltage VCC, benchmark voltage-stablizer U301 pass through capacitance C302 connecting triodes 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 triodes Q301, benchmark voltage-stablizer
The first pin that the third pin of U301 passes through resistance R303 connection benchmark voltage-stablizers U301.Wherein, by resistance R302, resistance
R303 and triode Q301 realize 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 of operational amplifier U401 is steady by resistance R401 connections
The output end of potential source module 103, the emitter of the inverting input connecting triode Q401 of operational amplifier U401.Operation amplifier
The in-phase input end of device U401 passes through the output end of resistance R402 connection voltage stabilizings source module 103, the same phase of operational amplifier U401
Input terminal is grounded by resistance R403.The positive pole connection voltage stabilizing source module 103 of operational amplifier U401, and receive 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 connections
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 in-phase input end of the control source 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 in-phase input end connection filter module 102 of operational amplifier U501, the inverting input 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 that the output end of operational amplifier U501 passes through resistance R501 connection dim signals processing module 105.Operation is put
The power cathode ground connection of big device U501, the positive pole connection voltage stabilizing source module 103 of operational amplifier U501, and receive benchmark electricity
Press VDD.The in-phase input end of operational amplifier U501 accept filter module 102 transmission it is filtered after original dim signal and
Constant current, to which when inputting the original dim signal in setting range, operational amplifier U501 can be according to original light modulation
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 voltage 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 in-phase input end of operational amplifier U501 inputs is more than the maximum value of predetermined voltage range,
According to reference voltage to original dim signal carry out clamper, to make output direct current dim signal voltage in predeterminated voltage model
In enclosing.It is appreciated that resistance dim signal, voltage tune that operational amplifier U501 can be to the output of dim signal input module 101
Optical signal, PWM dim signals are limited.
Alternatively, the first protection 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 protection module 107 includes diode D701 in 3rd embodiment, and the anode of diode D701 is even
Meet the output end of filter module 102, the cathode connection supply voltage VCC of diode D701.
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 connections filter module 102
The base stage of output end, triode Q801 passes through the emitter of resistance R802 connecting triodes 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 modules with the base stage of the emitter of resistance R804 connecting triodes Q802, triode Q802
Outlet, and receive reference voltage V DD；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 less 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 ensure to dim minimum current.
It is appreciated that on the basis of the circuit diagram that 3rd embodiment provides, remove the first protection module 106, second guarantor
Protect module 107 and 108 corresponding circuit of dimming controlling module, you can obtain the circuit diagram of first embodiment.Similarly, in third
On the basis of the circuit diagram provided in embodiment, remove 107 corresponding circuit of the first protection module 106 and the second protection module,
It can be obtained the circuit diagram of second embodiment.So the present invention is no longer superfluous to the circuit diagram of first embodiment and second embodiment
It states.In addition, the circuit diagram of the present 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 domain.
By applying the present invention, same LED adjusting control circuits can export different types of dim signal as needed, knot
Structure is simple, and good compatibility, reliability are high, at low cost.
Above example only technical concepts and features to illustrate the invention, its object is to allow person skilled in the art
Scholar can understand present disclosure 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, the covering scope of the claims in the present invention should all be belonged to.
Claims (10)
1. a kind of LED adjusting control circuits, which is characterized in that including dim signal input module (101), filter module (102),
Voltage stabilizing source module (103), constant current source module (104) and dim signal processing module (105)；
The input terminal of the voltage stabilizing source module (103) connects supply voltage VCC, and the output end of the voltage stabilizing source module (103) connects
Connect the constant current source module (104), voltage needed for voltage stabilizing source module (103) the output reference voltage VDD and light modulation is to described
Constant current source module (104)；The voltage stabilizing source module (103) connects and exports at the reference voltage V DD to the dim signal
Manage 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
Go 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 signals, the light modulation letter
Number input module (101) selects an output to the filter module (102).
2. LED adjusting control circuits 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 voltage 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, when sampling photovoltage less than setting dimmer voltage, provide a voltage bias.
3. LED adjusting control circuits 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 connections 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 V DD；The collector of the triode Q802 connects the output end of the dim signal processing module (105).
4. LED adjusting control circuits according to claim 1, which is characterized in that further include being in the constant current source module
(104) the first protection module (106) between filter module (102), first protection module (106) are described for preventing
The abnormal signal of original dim signal flows into the constant current source module (104)；
First protection 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 circuits stated according to claim 1, which is characterized in that further include connecting with the filter module (102)
The output end of the second protection module (107) connect, second protection module (107) connects the supply voltage VCC；Described
Two protection 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 protection 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. according to claim 1-5 any one of them LED adjusting control circuits, which is characterized in that the dim signal input
Module (101) includes resistance input circuit, voltage input circuit, PWM input circuits；
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 circuits is grounded, and the other end connects the output end of the dim signal input module (101), is used
In the output PWM dim signals.
7. according to claim 1-5 any one of them LED adjusting control circuits, which is characterized in that the filter module (102)
One end including resistance R201 and capacitance C201, 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 capacitance C201, described
The other end of resistance R201 connects the input terminal of the dim signal processing module (105).
8. according to claim 1-5 any one of them LED adjusting control circuits, which is characterized in that the voltage stabilizing source module
(103) include benchmark voltage-stablizer U301, triode Q301, resistance R301, resistance R302, resistance R303, capacitance C301, capacitance
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 capacitance C301 connections 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 capacitance 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. according to claim 1-5 any one of them LED adjusting control circuits, which is characterized in that the constant current source module
(104) include operational amplifier U401, triode Q401, resistance R401, resistance R402, resistance R403, resistance R404；
The inverting input of the operational amplifier U401 is defeated by the resistance R401 connections voltage stabilizing source module (103)
Outlet, the inverting input of the operational amplifier U401 connect the emitter of the triode Q401；
The in-phase input end of the operational amplifier U401 is defeated by the resistance R402 connections voltage stabilizing source module (103)
The in-phase input end of outlet, the operational amplifier U401 is grounded by the resistance R403；
The positive pole of the operational amplifier U401 connects the voltage 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. according to claim 1-5 any one of them LED adjusting control circuits, which is characterized in that the dim signal processing
Module (105) includes described in the in-phase input end connection of operational amplifier U501 and resistance R501, the operational amplifier U501
The inverting input of the output end of filter module (102), the operational amplifier U501 connects 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 voltage stabilizing
Source module (103), and receive the reference voltage V DD；
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 |
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| 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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| CN108449837A true CN108449837A (en) | 2018-08-24 |
| CN108449837B 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 |
|---|---|
| CN (1) | CN108449837B (en) |
| WO (1) | WO2019196695A1 (en) |
Cited By (6)
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| WO2019196695A1 (en) * | 2018-04-13 | 2019-10-17 | 深圳市崧盛电子股份有限公司 | Led dimming control circuit |
| CN110940878A (en) * | 2019-12-04 | 2020-03-31 | 唐山学院 | Automatic detection device for communication instrument |
| CN112055442A (en) * | 2020-08-12 | 2020-12-08 | 东莞华明灯具有限公司 | Low-voltage dimming LED lamp system capable of adapting to power supply of arbitrary waveform voltage |
| CN112333894A (en) * | 2020-10-29 | 2021-02-05 | 昂宝电子（上海）有限公司 | Dimming control circuit and method |
| 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 |
| CN117915509A (en) * | 2023-12-27 | 2024-04-19 | 佛山市伊戈尔电子有限公司 | Silicon controlled rectifier dimming circuit |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2019196695A1 (en) | 2019-10-17 |
| CN108449837B (en) | 2019-08-23 |
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