CN205491277U - Dimmer circuit system - Google Patents
Dimmer circuit system Download PDFInfo
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- CN205491277U CN205491277U CN201521141348.9U CN201521141348U CN205491277U CN 205491277 U CN205491277 U CN 205491277U CN 201521141348 U CN201521141348 U CN 201521141348U CN 205491277 U CN205491277 U CN 205491277U
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Abstract
The embodiment of the utility model discloses dimmer circuit system, this system includes the light modulator, dimmer circuit, little the control unit MCU, transform and output module and auxiliary electrical power source, dimmer circuit includes voltage follower circuit and phase inverter, voltage follower circuit's the input and the input of phase inverter are connected to the output of light modulator, MCU's first input end is connected to voltage follower circuit's output, MCU's second input is connected to the output of phase inverter, transform and output module's input is connected to MCU's output, MCU's feeder ear is connected to auxiliary electrical power source's first output, transform and output module's feeder ear is connected to auxiliary electrical power source's second output, dimmer circuit's feeder ear is connected to auxiliary electrical power source's third output. Implement the embodiment of the utility model provides a, can promote dimmer circuit's compatibility.
Description
Technical field
This utility model relates to electronic circuit technology field, is specifically related to a kind of light adjusting circuit system.
Background technology
At present, the dimming control signal of LED drive power typically has two kinds, and one is simulation brightness adjustment control letter
Number, another kind is pulsewidth modulation (Pulse-Width Modulation, PWM) digital dimming control signal,
Simulation dimming control signal is produced by simulating dimmer, and PWM count tone of Chinese characters optical control signal is by PWM dimmer
Produce.In order to adapt to the dimming control signal that different dimmers produces, generally require and separately design two not
With light adjusting circuit, it is seen then that existing light adjusting circuit cannot compatible different dimming control signal, light modulation electricity
The compatibility on road is poor.
Utility model content
This utility model embodiment provides a kind of light adjusting circuit system, can compatible different dimming control signal,
Promote the compatibility of light adjusting circuit.
This utility model embodiment provides a kind of light adjusting circuit system, including dimmer, light adjusting circuit, micro-
Control unit MCU, conversion and output module and accessory power supply, described light adjusting circuit includes voltage follower circuit
And phase inverter, wherein:
The outfan of described dimmer connects input and the input of described phase inverter of described voltage follower circuit
End, the outfan of described voltage follower circuit connects the first input end of described MCU, described phase inverter defeated
Going out the second input that end connects described MCU, the outfan of described MCU connects described conversion and output module
Input, described accessory power supply first outfan connect described MCU feeder ear, described accessory power supply
The second outfan connect described conversion and the feeder ear of output module, the 3rd outfan of described accessory power supply
Connect the feeder ear of described light adjusting circuit；Described dimmer is used for producing dimming control signal, and by described tune
Optical control signal output is to described voltage follower circuit and described phase inverter, and described voltage follower circuit is by described
Dimming control signal is converted into the first input end of the first dim signal output extremely described MCU, described phase inverter
Described dimming control signal is converted into second input of the second dim signal output extremely described MCU, described
MCU identifies the effective dim signal in described first dim signal and described second dim signal, and according to institute
State effective dim signal and produce current controling signal to described conversion and output module, described conversion and output mould
Tuber controls described conversion and the operating current of output module according to described current controling signal；Described accessory power supply
Power for described MCU, described conversion and output module and described light adjusting circuit, described dimming control signal bag
Include simulation dimming control signal or digital dimming control signal.
Wherein, described voltage follower circuit includes:
Voltage follower, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the first electric capacity and
Two electric capacity, wherein:
First end of described first resistance connects the 3rd outfan of described accessory power supply, described first resistance
Second end connects the outfan of described dimmer and the in-phase input end of described voltage follower, described voltage with
Outfan and the first end of described second resistance, the institute of described voltage follower is connected with the inverting input of device
The second end stating the second resistance connects the first end of described 3rd resistance, the first end of described first electric capacity and institute
Stating the first end of the 4th resistance, the second end of described 3rd resistance connects the second end of described first electric capacity, institute
Stating the second end and the ground end of the second electric capacity, the first end of described second electric capacity connects the second of described 4th resistance
End and the first input end of described MCU；Described dimming control signal is converted into and follows by described voltage follower
The outfan of control signal output extremely described voltage follower, described voltage follower circuit is by described second electricity
Resistance, described 3rd resistance and described 4th resistance carry out dividing potential drop to described model-following control signal, obtain described the
One dim signal also exports the first input end to described MCU.
Wherein, described phase inverter include the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th
Resistance, audion, stabilivolt, field effect transistor and the 3rd electric capacity, wherein:
First end of described 5th resistance connects the outfan of described dimmer, the homophase of described voltage follower
Input and the second end of described first resistance, the second end of described 5th resistance connects the base of described audion
Pole, the grounded collector of described audion, the emitter stage of described audion connects the second of described 6th resistance
End, the first end, the negative pole of described stabilivolt and the grid of described field effect transistor of described 7th resistance, described
First end of the 6th resistance connects the first feeder ear, and described first feeder ear voltage is by the of described accessory power supply
Three outfans provide, the second end, the positive pole of described stabilivolt and the described field effect transistor of described 7th resistance
Source grounding, the drain electrode of described field effect transistor connects the of the second end of the 8th resistance and described 9th resistance
One end, the first end of described 8th resistance connects the second feeder ear, and described second feeder ear voltage is by described auxiliary
Help power supply the 3rd outfan provide, described 9th resistance second end connect described 3rd electric capacity positive pole and
Second input of described MCU, the minus earth of described 3rd electric capacity；Described phase inverter is by described light modulation control
It is defeated that the signal processed light modulation dividing potential drop control signal after described 5th electric resistance partial pressure is converted into described second dim signal
Going out the second input to described MCU, described second dim signal is the anti-of described light modulation dividing potential drop control signal
Phase signals.
Wherein, described system also includes that Transient Suppression Diode, described dimmer also include earth terminal, wherein,
The outfan of described dimmer connects the negative pole of described Transient Suppression Diode, described Transient Suppression Diode
Plus earth.
Wherein, described simulation dimming control signal includes that 0-10V simulates dimming control signal, described digital dimming
Control signal includes PWM count tone of Chinese characters optical control signal.
Wherein, identify that described first dim signal is that described 0-10V simulates dimming control signal as described MCU
Time, the size of described current controling signal is adjusted according to the size of described first dim signal.
Wherein, identify that described second dim signal is described PWM count tone of Chinese characters optical control signal as described MCU
Time, the size of described current controling signal is adjusted according to the dutycycle of described second dim signal.
Wherein, described first dim signal of described first input end input is detected less than 0.5V as described MCU
Or described second input input described second dim signal dutycycle less than 5% time, the control of described MCU
End processed output high level protection signal is to described conversion and the feedback end of output module, so that described conversion and defeated
The feedback end going out module turns off output.
In this utility model embodiment, the tune that dimmer can be exported by the light adjusting circuit in light adjusting circuit system
Optical control signal is converted into the first dim signal by voltage follower circuit and exports the first input end to MCU,
The dimming control signal exported by dimmer is converted into the second dim signal by phase inverter and exports the to MCU
Two inputs, MCU identifies the effective dim signal in the first dim signal and the second dim signal, and according to
This effective dim signal produces current controling signal extremely conversion and output module, and conversion and output module are according to electricity
Flow control signals controls conversion and the operating current of output module, and wherein, dimming control signal includes that simulation is adjusted
Optical control signal or digital dimming control signal.Implementing this utility model embodiment, light adjusting circuit system both may be used
To process simulation dimming control signal, it is also possible to process digital dimming control signal, can compatible different tune
Optical control signal, promotes the compatibility of light adjusting circuit.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme in this utility model embodiment, below will be to institute in embodiment
The accompanying drawing used is needed to be briefly described, it should be apparent that, the accompanying drawing in describing below is only this practicality
Some novel embodiments, for those of ordinary skill in the art, before not paying creative work
Put, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of light adjusting circuit system disclosed in this utility model embodiment；
Fig. 2 is the structural representation of another kind of light adjusting circuit system disclosed in this utility model embodiment；
Fig. 3 is the structural representation of another kind of light adjusting circuit system disclosed in this utility model embodiment.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, to the skill in this utility model embodiment
Art scheme is clearly and completely described.Obviously, described embodiment is one of the present utility model
Divide embodiment rather than whole embodiment.Based on the embodiment in this utility model, this area is general
The every other embodiment that logical technical staff is obtained on the premise of not making creative work, all answers
Belong to the scope of this utility model protection.
This utility model embodiment provides a kind of light adjusting circuit system, can compatible different dimming control signal,
Promote the compatibility of light adjusting circuit.It is described in detail individually below.
Referring to Fig. 1, Fig. 1 is the structural representation of a kind of light adjusting circuit system disclosed in this utility model embodiment
Figure.As it is shown in figure 1, the light adjusting circuit system described in the present embodiment, including dimmer 101, light modulation electricity
Road 102, micro-control unit MCU103, conversion and output module 104 and accessory power supply 105, light adjusting circuit 102
Including voltage follower circuit 1021 and phase inverter 1022, wherein:
The outfan 111 of dimmer 101 connects the input of voltage follower circuit 1021 and the defeated of phase inverter 1022
Entering end, the outfan of voltage follower circuit 1021 connects the first input end 131 of MCU103, phase inverter 1022
Outfan connect second input 132 of MCU103, the outfan 133 of MCU103 connects conversion and output
The input 141 of module 104, the first outfan 151 of accessory power supply 105 connects the feeder ear 134 of MCU103,
Second outfan 152 of accessory power supply 105 connects conversion and the feeder ear 142 of output module, accessory power supply 105
The 3rd outfan 153 connect the feeder ear 121 of light adjusting circuit 102；Dimmer 101 is used for producing brightness adjustment control
Signal, and by dimming control signal output to voltage follower circuit 1021 and phase inverter 1022, voltage follow electricity
Dimming control signal is converted into the first dim signal and exports the first input end 131 to MCU103 by road 1021,
Dimming control signal is converted into the second dim signal and exports the second input to MCU103 by phase inverter 1022
132, MCU103 identify the effective dim signal in the first dim signal and the second dim signal, and according to having
Effect dim signal produces current controling signal to conversion and output module 104, conversion and output module 104 basis
Current controling signal controls conversion and the operating current of output module 104, and accessory power supply 105 is MCU103, change
Change and output module 104 and light adjusting circuit 102 powered, dimming control signal include simulating dimming control signal or
Digital dimming control signal.
In this utility model embodiment, dimmer (dimmer) 101 can include 0-10V dimmer, PWM
(Pulse-Width Modulation) dimmer, 0-10V dimmer produces simulation dimming control signal, PWM
Dimmer produces digital dimming control signal, and light adjusting circuit 102 includes voltage follower circuit 1021 and phase inverter
1022, accessory power supply 105 can output voltage signal to the feeder ear 134 of MCU103 respectively, convert and export
The feeder ear 142 of module 104 and the feeder ear 121 of light adjusting circuit 102, accessory power supply 105 can be voltage with
Power with circuit 1021, phase inverter 1022, conversion and output module 104 and MCU103, accessory power supply 105
The d. c. voltage signal of multiple different size can be provided, such as the DC voltage of 12V, 5V.Dimmer 101 produces
Raw dimming control signal (includes simulating dimming control signal or digital dimming control signal), and dim signal passes through
Voltage follower circuit 1021 is converted into the first dim signal and exports the first input end to MCU103 after processing, adjust
Optical signal is converted into the second dim signal output after phase inverter 1022 processes and inputs to the first of MCU103
End, MCU103 identifies that the effective dim signal in the first dim signal and the second dim signal (works as MCU103
Identifying when the first dim signal is lasting positive voltage signal, MCU103 identifies that the first dim signal is for effectively adjusting
Optical signal；When MCU103 identifies that the second dim signal is periodically variable signal, during such as pwm signal,
MCU103 identifies that the second dim signal is effective dim signal), and produce electric current control according to effective dim signal
Signal processed (current controling signal here can be PWM count word signal), to conversion and output module 104, becomes
Change and output module 104 can include electric current loop module, cascade coupled resonator modules LLC, transformator translation circuit,
Rectification circuit and LED group, conversion and output module 104 control conversion and output mould according to current controling signal
The operating current of block 104, the i.e. operating current of LED group, wherein, the dutycycle of current controling signal is the highest,
The operating current of conversion and output module 104 is the biggest.If MCU103 identifies that the first dim signal is for effectively light modulation
Signal, then be converted into the magnitude of voltage of the first dim signal corresponding current controling signal and export to becoming
Changing and output module 104, wherein, the magnitude of voltage of the first dim signal is the biggest, the dutycycle of current controling signal
The highest, conversion and output module 104 convert and output module 104 according to the Duty ratio control of current controling signal
Operating current (dutycycle of current controling signal is the highest, and conversion and the operating current of output module 104 are the biggest,
LED in the case of the running voltage of conversion and output module 104 is constant, in conversion and output module 104
The brightness of lamp group is the highest), thus control the luminosity of the LED group in conversion and output module 104；If
MCU103 identifies that the second dim signal is effective dim signal, then by the most right for being converted into of the second dim signal
The current controling signal (current controling signal here can be PWM count word signal) answered output are to conversion
And output module 104, conversion and output module 104 convert and defeated according to the Duty ratio control of current controling signal
Go out the operating current of module 104, thus control the luminosity of the LED group in conversion and output module 104.
It is pointed out that owing to the signal of dimmer 101 output can only be simulation dimming control signal and digital dimming
One in control signal, MCU103 can only identify a kind of letter in the first dim signal and the second dim signal
Number being effective dim signal, MCU103 will not identify that the first dim signal and the second dim signal have been simultaneously
Effect dim signal, when the signal of dimmer 101 output is for simulation dimming control signal, MCU103 identifies the
One dim signal is effective dim signal；When the signal of dimmer 101 output is digital dimming control signal,
MCU103 identifies that the second dim signal is effective dim signal.
This utility model embodiment, a kind of light adjusting circuit system of design, by improving light adjusting circuit, so that adjusting
Optical circuit can process simulation dimming control signal, also can process digital dimming control signal, can compatibility not
Same dimming control signal, real-time this utility model embodiment, the compatibility of light adjusting circuit can be promoted.
Referring to Fig. 2, Fig. 2 is that disclosed in this utility model embodiment, the structure of another kind of light adjusting circuit system is shown
It is intended to.As in figure 2 it is shown, the light adjusting circuit system described in the present embodiment, including dimmer 101, light modulation
Circuit 102, micro-control unit MCU103, conversion and output module 104 and accessory power supply 105, light adjusting circuit
102 include voltage follower circuit 1021 and phase inverter 1022, wherein:
The outfan of dimmer 101 connects input and the input of phase inverter 1022 of voltage follower circuit 1021
End, the outfan of voltage follower circuit 1021 connects the first input end 131 of MCU103, phase inverter 1022
Outfan connects second input 132 of MCU103, and the outfan 133 of MCU103 connects conversion and output mould
The input 141 of block 104, the first outfan 151 of accessory power supply 105 connects the feeder ear 134 of MCU103,
Second outfan 152 of accessory power supply 105 connects conversion and the feeder ear 142 of output module, accessory power supply 105
The 3rd outfan 153 connect the feeder ear 121 of light adjusting circuit 102.
Voltage follower circuit 1021 includes voltage follower U1, the first resistance R1, the second resistance R2, the 3rd electricity
Resistance R3, the 4th resistance R4, the first electric capacity C1 and the second electric capacity C2, wherein, first end of the first resistance R1 is even
Connecing the 3rd outfan 153 of accessory power supply 105, second end of the first resistance R1 connects the outfan of dimmer 101
With the in-phase input end 1 of voltage follower U1, the inverting input 2 of voltage follower U1 connects voltage follower
The outfan 3 of U1 and first end of the second resistance R2, second end of the second resistance R2 connects the 3rd resistance R3's
First end, first end of the first electric capacity C1 and first end of the 4th resistance R4, second end of the 3rd resistance R3 is even
Connecing second end of the first electric capacity C1, second end of the second electric capacity C2 and ground end, first end of the second electric capacity C2 is even
Connect second end of the 4th resistance R4 and the first input end 131 of MCU103；Voltage follower U1 is by brightness adjustment control
Signal is converted into model-following control signal and exports the outfan 3 to voltage follower U1, voltage follower circuit 1021
By the second resistance R2, the 3rd resistance R3 and the 4th resistance R4, model-following control signal is carried out dividing potential drop, obtain
One dim signal also exports the first input end 131 to MCU103.
Phase inverter 1022 include the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8,
Nine resistance R9, audion T1, stabilivolt D1, field effect transistor Q1 and the 3rd electric capacity C3, wherein:
First end of the 5th resistance R5 connects the outfan of dimmer 101, the in-phase input end of voltage follower U1
1 and first second end of resistance R1, the base stage of the second end connecting triode T1 of the 5th resistance R5, audion
The grounded collector of T1, the emitter stage of audion T1 connects second end of the 6th resistance R6, the 7th resistance R7
First end, the negative pole of stabilivolt D1 and the grid of field effect transistor Q1, first end of the 6th resistance R6 connects first
Feeder ear, the first feeder ear voltage is provided by the 3rd outfan 153 of accessory power supply 105, the 7th resistance R7's
Second end, the positive pole of stabilivolt D1 and the source grounding of field effect transistor Q1, the drain electrode of field effect transistor Q1 connects
Second end of the 8th resistance R8 and first end of the 9th resistance R9, first end of the 8th resistance R8 connects the second confession
Electricity end, the second feeder ear voltage by the 3rd outfan 153 of accessory power supply 105 provide (concrete, second supply
The voltage signal that electricity terminal voltage is exported by the 3rd outfan 153 of accessory power supply 105 is after dividing potential drop mu balanced circuit
There is provided), second end of the 9th resistance R9 connects positive pole and second input of MCU103 of the 3rd electric capacity C3
132, the minus earth of the 3rd electric capacity C3；Phase inverter 1022 by dimming control signal after the 5th resistance R5 dividing potential drop
Light modulation dividing potential drop control signal be converted into the second dim signal output to second input 132 of MCU103, the
Two dim signals are the inversion signal of light modulation dividing potential drop control signal.
In this utility model embodiment, the first resistance R1 resistance can use the resistance that resistance is bigger, such as,
The resistance that resistance can be used to be 200K Ω, the homophase that the R1 big resistance of employing can reduce voltage follower U1 is defeated
Enter the loss of the dimming control signal of end input, the signal of outfan 3 output of voltage follower U1 and dimmer
The dimming control signal difference of 101 outputs is the least, and the model of voltage follower U1 can be LM2904D.Adjust
Optical control signal, after voltage follower U1 exports, only has the less loss (outfan of voltage follower U1
The signal of 3 outputs, compared with the dimming control signal that in-phase input end inputs, only has less loss), voltage
Follower U1 exports model-following control signal, model-following control signal through the second resistance R2, the 3rd resistance R3 and
Obtain the first dim signal after 4th resistance R4 dividing potential drop, and export the first input end 131 to MCU103.
In order to ensure the safety of MCU103, the electricity of the first dim signal of first input end 131 input of MCU103
Pressure signal is preferably not more than 5V, and the resistance that can arrange the second resistance R2 is 51K Ω, the 3rd resistance R3's
Resistance is 33K Ω, and the resistance of the 4th resistance R4 is 10K Ω, though the outfan 3 of the first voltage follower U1
The output voltage of output reaches the electricity of the first dim signal of first input end 131 input of 12V, MCU103
Pressure also can be less than 12V × 33/ (33+51)=4.71V, the safe voltage that can process less than MCU103.Work as tune
When optical control signal is analogue signal, MCU103 identifies that the first dim signal of input is useful signal；Work as tune
When optical control signal is digital signal, the first dim signal of the first input end input of MCU103 is the least,
MCU103 identifies that the first dim signal of input is invalid signals.
In this utility model embodiment, the phasing back 180 ° of the signal of input is exported extremely by phase inverter 1022
MCU103, dimming control signal light modulation dividing potential drop after the 5th resistance R5 dividing potential drop is controlled letter by phase inverter 1022
Number being converted into the second dim signal output to second input 132 of MCU103, the second dim signal is light modulation
The inversion signal of dividing potential drop control signal.For example, the resistance of the 5th resistance R5 can be set to 10K Ω, and the 6th
The resistance of resistance R6 can be set to 10K Ω, and the resistance of the 7th resistance R7 can be set to 51k Ω, the 8th resistance R8
Resistance can be set to 10K Ω, it can be PNP that the resistance of the 9th resistance R9 can be set to 100 Ω, audion T1
Type, concrete model can be LMBT3906, and the burning voltage of stabilivolt D1 can be 16V, field effect transistor
Q1 can be N-channel enhancement mode metal-oxide-semiconductor.When dimming control signal is analogue signal, phase inverter 1022 is defeated
When the second dim signal gone out is lasting negative voltage signal, MCU103 end identification the second dim signal is invalid
Signal；When dimming control signal is digital signal, the second dim signal of phase inverter 1022 output is anti-phase
Digital signal, MCU103 identifies that the second dim signal is useful signal.
Optionally, as it is shown on figure 3, Fig. 3 is another kind of light adjusting circuit system disclosed in this utility model embodiment
Structural representation, the light adjusting circuit system described by Fig. 3 is on the light adjusting circuit system-based of Fig. 2, also
Including Transient Suppression Diode D2, wherein:
Dimmer 101 also includes earth terminal, and the outfan of dimmer 101 connects the negative of Transient Suppression Diode D2
Pole, the plus earth of Transient Suppression Diode D2.
In this utility model embodiment, between the outfan 111 and earth terminal GND of dimmer 101, connect wink
State suppression diode (Transient Voltage Suppressor, TVS) D2, the outfan 111 of dimmer 101
Connect the negative pole of Transient Suppression Diode D2, the plus earth of Transient Suppression Diode D2.D2 can be 16V
Transient Suppression Diode in order to when reversal connection dimming control signal, protection light adjusting circuit system
Safety, TVS can be hit by snowslide rapidly when reversal connection dimming control signal exceedes a certain size (such as 16V)
Wear, absorb transient state high-power, the safety of protection circuit system.
Optionally, simulation dimming control signal includes that 0-10V simulates dimming control signal, and digital dimming controls letter
Number include PWM count tone of Chinese characters optical control signal.
In this utility model embodiment, simulation dimming control signal can also include 1-10V simulation brightness adjustment control letter
Number.
Optionally, when MCU103 identifies that the first dim signal is 0-10V simulation dimming control signal, according to
The size of the first dim signal adjusts the size of current controling signal.
In this utility model embodiment, when by first input end 131, MCU103 identifies that the first dim signal is
0-10V simulates dimming control signal, identifies, by the second input 132, the mould that the second dim signal is-10-0V
When intending dimming control signal, it is determined that the first dim signal is useful signal, and the second dim signal is invalid letter
Number, and the size of the size adjustment current controling signal according to the first dim signal, specifically, MCU103
The size of current controling signal can be adjusted according to the size of 0-10V simulation dimming control signal, work as 0-10V
When simulation dimming control signal is the biggest, the dutycycle of current controling signal is the biggest, i.e. MCU103 identifies the first tune
When optical signal is the biggest, the dutycycle of MCU103 output to conversion and the current controling signal of output module 104 is more
Greatly, for example, if the first dim signal is 5V, the dutycycle of current controling signal is 50%, conversion
And the operating current (i.e. the operating current of LED group) of output module 104 is 1.6A, if the first dim signal
During for 2.5V, the dutycycle of current controling signal is 25%, and the operating current of conversion and output module 104 is
0.8A。
Optionally, when MCU103 identifies that the second dim signal is PWM count tone of Chinese characters optical control signal, according to
The dutycycle of the second dim signal adjusts the size of current controling signal.
In this utility model embodiment, the dimming control signal produced when dimmer 101 is that digital dimming controls letter
Number time, MCU103 identifies that the first dim signal is the least by first input end 131, determines the first dim signal
For invalid signals, by the second input 132, MCU103 identifies that the second dim signal is that the PWM count tone of Chinese characters is light-operated
Signal processed, determines that the second dim signal is useful signal, and adjusts electricity according to the dutycycle of the second dim signal
The size of flow control signals, specifically, MCU103 can accounting for according to PWM count tone of Chinese characters optical control signal
Empty ratio adjusts the size of current controling signal, when the dutycycle of PWM count tone of Chinese characters optical control signal is the biggest,
The dutycycle of current controling signal is the biggest, i.e. MCU103 identifies when the dutycycle of the second dim signal is the biggest,
MCU103 output is the biggest to the dutycycle of conversion and the current controling signal of output module 104, for example,
If the dutycycle of the second dim signal is 80%, MCU103 output is to conversion and the electric current of output module 104
The dutycycle of control signal is 80%, conversion and operating current (the i.e. work of LED group of output module 104
Electric current) it is 2A, if the dutycycle of the second dim signal is 40%, MCU103 output to conversion and output mould
The dutycycle of the current controling signal of block 104 is 40%, and the operating current of conversion and output module 104 is 1A.
Optionally, as it is shown in figure 1, the first dim signal working as MCU103 detection first input end 131 input is little
When the dutycycle of the second dim signal that 0.5V or the second input 132 input is less than 5%, the control of MCU103
End 135 processed exports high level protection signal extremely conversion and the feedback end 143 of output module 104, so that converting and defeated
Go out module 104 and turn off output.
In this utility model embodiment, when the first dim signal of MCU103 detection first input end 131 input
When dutycycle less than 0.5V or the second dim signal of the second input 132 input is less than 5%, MCU103's
Control end 135 and produce an ON/OFF high level protection signal to conversion and the feedback end of output module 104
143, so that conversion and output module 104 turn off output.Owing to conversion and output module 104 are typically by simulation electricity
Road realizes, to such an extent as to is difficult to complete switch off the output of accessory power supply, implements this utility model embodiment, can
With (the first dim signal of MCU103 detection first input end 131 input when dimming control signal is more weak
When dutycycle less than 0.5V or the second dim signal of the second input 132 input is less than 5%), convert and defeated
Go out module 104 to quit work, turn off output, stop the confession to the LED group in conversion and output module 104
Electricity, can save power consumption.
A kind of light adjusting circuit system provided this utility model embodiment above is described in detail, this
Literary composition applies specific case principle of the present utility model and embodiment are set forth, above example
Explanation be only intended to help to understand method of the present utility model and core concept thereof；Simultaneously for this area
Those skilled in the art, according to thought of the present utility model, the most all can
Change part, and in sum, this specification content should not be construed as restriction of the present utility model.
Claims (8)
1. a light adjusting circuit system, it is characterised in that include dimmer, light adjusting circuit, micro-control unit
MCU, conversion and output module and accessory power supply, described light adjusting circuit includes voltage follower circuit and phase inverter,
Wherein:
The outfan of described dimmer connects input and the input of described phase inverter of described voltage follower circuit
End, the outfan of described voltage follower circuit connects the first input end of described MCU, described phase inverter defeated
Going out the second input that end connects described MCU, the outfan of described MCU connects described conversion and output module
Input, described accessory power supply first outfan connect described MCU feeder ear, described accessory power supply
The second outfan connect described conversion and the feeder ear of output module, the 3rd outfan of described accessory power supply
Connect the feeder ear of described light adjusting circuit；Described dimmer is used for producing dimming control signal, and by described tune
Optical control signal output is to described voltage follower circuit and described phase inverter, and described voltage follower circuit is by described
Dimming control signal is converted into the first input end of the first dim signal output extremely described MCU, described phase inverter
Described dimming control signal is converted into second input of the second dim signal output extremely described MCU, described
MCU identifies the effective dim signal in described first dim signal and described second dim signal, and according to institute
State effective dim signal and produce current controling signal to described conversion and output module, described conversion and output mould
Tuber controls described conversion and the operating current of output module according to described current controling signal；Described accessory power supply
Power for described MCU, described conversion and output module and described light adjusting circuit, described dimming control signal bag
Include simulation dimming control signal or digital dimming control signal.
System the most according to claim 1, it is characterised in that described voltage follower circuit includes:
Voltage follower, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the first electric capacity and
Two electric capacity, wherein:
First end of described first resistance connects the 3rd outfan of described accessory power supply, described first resistance
Second end connects the outfan of described dimmer and the in-phase input end of described voltage follower, described voltage with
Outfan and the first end of described second resistance, the institute of described voltage follower is connected with the inverting input of device
The second end stating the second resistance connects the first end of described 3rd resistance, the first end of described first electric capacity and institute
Stating the first end of the 4th resistance, the second end of described 3rd resistance connects the second end of described first electric capacity, institute
Stating the second end and the ground end of the second electric capacity, the first end of described second electric capacity connects the second of described 4th resistance
End and the first input end of described MCU；Described dimming control signal is converted into and follows by described voltage follower
The outfan of control signal output extremely described voltage follower, described voltage follower circuit is by described second electricity
Resistance, described 3rd resistance and described 4th resistance carry out dividing potential drop to described model-following control signal, obtain described the
One dim signal also exports the first input end to described MCU.
System the most according to claim 2, it is characterised in that described phase inverter include the 5th resistance,
6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, audion, stabilivolt, field effect transistor and
Three electric capacity, wherein:
First end of described 5th resistance connects the outfan of described dimmer, the homophase of described voltage follower
Input and the second end of described first resistance, the second end of described 5th resistance connects the base of described audion
Pole, the grounded collector of described audion, the emitter stage of described audion connects the second of described 6th resistance
End, the first end, the negative pole of described stabilivolt and the grid of described field effect transistor of described 7th resistance, described
First end of the 6th resistance connects the first feeder ear, and described first feeder ear voltage is by the of described accessory power supply
Three outfans provide, the second end, the positive pole of described stabilivolt and the described field effect transistor of described 7th resistance
Source grounding, the drain electrode of described field effect transistor connects the of the second end of the 8th resistance and described 9th resistance
One end, the first end of described 8th resistance connects the second feeder ear, and described second feeder ear voltage is by described auxiliary
Help power supply the 3rd outfan provide, described 9th resistance second end connect described 3rd electric capacity positive pole and
Second input of described MCU, the minus earth of described 3rd electric capacity；Described phase inverter is by described light modulation control
It is defeated that the signal processed light modulation dividing potential drop control signal after described 5th electric resistance partial pressure is converted into described second dim signal
Going out the second input to described MCU, described second dim signal is the anti-of described light modulation dividing potential drop control signal
Phase signals.
System the most according to claim 3, it is characterised in that described system also includes transient state suppression two
Pole is managed, and described dimmer also includes earth terminal, and wherein, the outfan of described dimmer connects described transient state and presses down
The negative pole of diode processed, the plus earth of described Transient Suppression Diode.
System the most according to claim 4, it is characterised in that described simulation dimming control signal includes
0-10V simulates dimming control signal, and described digital dimming control signal includes PWM count tone of Chinese characters optical control signal.
System the most according to claim 5, it is characterised in that when described MCU identifies that described first adjusts
When optical signal is described 0-10V simulation dimming control signal, adjust institute according to the size of described first dim signal
State the size of current controling signal.
System the most according to claim 5, it is characterised in that when described MCU identifies that described second adjusts
When optical signal is described PWM count tone of Chinese characters optical control signal, adjust according to the dutycycle of described second dim signal
The size of described current controling signal.
8. according to the system described in any one of claim 1～7, it is characterised in that when described MCU detects institute
Described first dim signal stating first input end input is described less than what 0.5V or described second input inputted
When the dutycycle of the second dim signal is less than 5%, the control end output high level protection signal of described MCU is to institute
State conversion and the feedback end of output module, so that described conversion and output module turn off output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521141348.9U CN205491277U (en) | 2015-12-31 | 2015-12-31 | Dimmer circuit system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521141348.9U CN205491277U (en) | 2015-12-31 | 2015-12-31 | Dimmer circuit system |
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| Publication Number | Publication Date |
|---|---|
| CN205491277U true CN205491277U (en) | 2016-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521141348.9U Active CN205491277U (en) | 2015-12-31 | 2015-12-31 | Dimmer circuit system |
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| Country | Link |
|---|---|
| CN (1) | CN205491277U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105491723A (en) * | 2015-12-31 | 2016-04-13 | 茂硕电源科技股份有限公司 | Dimming circuit system |
| CN106604464A (en) * | 2016-12-15 | 2017-04-26 | 宁波龙源照明电器有限公司 | Double-operational amplifier high-performance 0V-10V dimming circuit |
-
2015
- 2015-12-31 CN CN201521141348.9U patent/CN205491277U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105491723A (en) * | 2015-12-31 | 2016-04-13 | 茂硕电源科技股份有限公司 | Dimming circuit system |
| CN106604464A (en) * | 2016-12-15 | 2017-04-26 | 宁波龙源照明电器有限公司 | Double-operational amplifier high-performance 0V-10V dimming circuit |
| CN106604464B (en) * | 2016-12-15 | 2018-08-03 | 宁波龙源照明电器有限公司 | The 0V-10V light adjusting circuits being made of double operational |
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