CN202276494U - Multiple dimming input circuit - Google Patents
Multiple dimming input circuit Download PDFInfo
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- CN202276494U CN202276494U CN2011201625806U CN201120162580U CN202276494U CN 202276494 U CN202276494 U CN 202276494U CN 2011201625806 U CN2011201625806 U CN 2011201625806U CN 201120162580 U CN201120162580 U CN 201120162580U CN 202276494 U CN202276494 U CN 202276494U
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Abstract
The utility model provides a multiple dimming input circuit which is used for generating analogy voltage and outputting the analogy voltage to a dimming driving circuit. The multiple dimming input circuit comprises an input end, an output end, a constant current source, a voltage adjusting unit and a filter unit.
Description
Technical field
The utility model relates to a kind of multiple light adjusting circuit, refers in particular to a kind of light modulation input circuit with multiple input pattern.
Background technology
At present, lighting has become daily necessities, and light can be provided at night, or as index, security warning or the like purposes.Along with socio-economic development, no matter nowadays the big city day and night all is that brilliantly illuminated, a large amount of lighting device causes burden to supply of electric power gradually.
Lighting generally speaking often is to be fixed on high energy consumption maximum brightness to use down, though number of users what, use is why, the surrounding environment light and shade.Therefore can bring a lot of energy wastes, lose bulb life and produce more used heat.
Recently, most energy-saving lamps light adjusting controller of can arranging in pairs or groups changes output brightness.The user is through the control light adjusting controller, and lighting can provide different brightness level scheme according to user's demand.Yet owing to the difference of considering of manufacturer's difference or circuit design, the output signal of light adjusting controller also has various output specification.
Simultaneously because of above-mentioned different types of light adjusting controller; The light modulation drive circuit often needs the different circuits input design of corresponding adjustment; Just can receive different types of input controlling signal; Thereby with different Electric Design driven for emitting lights sources (like the LED lamp), the drive circuit on light adjusting controller and the light fixture can't possibly make the dimming function inefficacy or cause the circuit damage at once.
The utility model content
For addressing the above problem,, the utility model provides a kind of light modulation input circuit with multiple input pattern.
For realizing the purpose of the utility model, the multiple light modulation input circuit that the utility model provides comprises:
One input, lotus root are connected to an input node;
One output is used to transmit said analog voltage output;
One constant current source, lotus root are connected to said input node;
One voltage-adjusting unit, lotus root are connected between a said input node and the earth terminal;
One filter unit, lotus root are connected between a said input node and the earth terminal;
And an output slow-action unit, lotus root is connected between said filter unit and the said output;
Wherein, when said input was imported analog voltage input, said analog voltage output was proportional to a voltage quasi position of said analog voltage input; When said input was imported a PWM signal, said analog voltage output was proportional to a duty ratio of said PWM signal; When lotus root connect a variable resistor between a said input and the earth terminal, said analog voltage output was proportional to a said variable-resistance resistance.
A kind of multiple light modulation input circuit that the utility model provides, the input signal with polytype (like analog voltage input, PWM signal, variable resistor) converts analog voltage output into, to raise the brightness adjustment control signal of light drive circuit as light fixture.And the analog voltage analogy of output must and be proportional to the input voltage of analog voltage input, the duty ratio of pulse width modulation signal or the resistance value of variable resistor resistance for linearity.
Description of drawings
Accompanying drawing 1 is the sketch map of a kind of multiple light modulation input circuit of the utility model;
Circuit diagram when accompanying drawing 2 is corresponding analog voltage input of the multiple light modulation input circuit of the utility model or PWM signal;
Circuit diagram when accompanying drawing 3 is the multiple light modulation input circuit of the utility model corresponding variable resistance;
Accompanying drawing 4 is that constant current source is decided the current characteristics simulation drawing respectively under different variable resistor resistances;
Accompanying drawing 5A is the experimental result picture of relative analog voltage output relation under variable resistor or analog voltage input pattern;
Accompanying drawing 5B is the experimental result picture of relative analog voltage output relation under passive PWM signal mode;
Accompanying drawing 5C is the experimental result picture of relative analog voltage output relation under the PWM signal mode;
Accompanying drawing 5D is the experimental result picture of relative analog voltage output relation under another PWM signal mode.
The component symbol explanation:
Multiple light modulation input circuit 100; Constant current source 120; Voltage-regulating circuit 140;
Output OUT1; Analog voltage input Va; PWM signal Vpwm;
System voltage end Vdd; Reference voltage end Vref; Operational amplifier OP1;
Filter resistance R1; Filter capacitor C1; Current-limiting resistance R2;
Input filter capacitor C2; Variable resistor Ra; Decide electric current I c.
Embodiment
In order better to understand the utility model content, will combine accompanying drawing that the utility model is further specified below.
Because manufacturer's difference or considering of circuit design are differed, the output signal of light adjusting controller also has various output specification on the market.The controlling signal of at present common light adjusting controller generation mainly is divided into following three kinds:
(1) analog voltage input:
Be generally 1V～10V (analog voltage input of or 0v～10v); Utilize the size of voltage quasi position to represent the different brightness level; Because the output signal also is to adopt analogical pattern, therefore input is if adopt 1～10V input, and circuit only need be done amplification or decay, slow-action gets final product.In design, do not have too big problem;
(2) PWM signal:
Be generally the PWM signal between 12v～24V, utilize PWM difference that input signal has to take up space and represent the different brightness level than (duty cycle).When adopting PWM signal input signal, analog voltage output must be proportional to the duty ratio of PWM input signal, therefore can adopt the RC filter that the filter of PWM input signal is anaiog signal.The PWM input signal of existing light adjusting controller adopts the system of 12～24V, therefore if adopt resistance-capacitance filtering must get rid of the influence of its voltage quasi position of PWM input signal; And
(3) directly variable resistor adjustment:
Adopt adjustable variable resistance, utilize the resistance of variable resistance to represent the different brightness level, this mode is for directly connecting a variable resistor (being generally 100k ohm, lienar for), do not need extra, the power supply just can light modulation.General electric resistance partial pressure mode commonly used designs, but along with the variable resistor resistance is different, the output of analogy power supply appears non-linear, can cause the lamplight brightness variation also to appear non-linear.
Therefore, the utility model proposes a kind of multiple light modulation input circuit, and the purpose of its design is, with polytype input signal, converts linear analog voltage output into, to raise the brightness adjustment control signal of light drive circuit as light fixture.
See also the 1st figure, be a kind of sketch map of multiple light modulation input circuit 100.Shown in the 1st figure, multiple light modulation input circuit 100 comprises input IN1, output OUT1/ constant current source 120, voltage-adjusting unit 140, filter unit 160 and output slow-action unit 180.In addition, more than this implements row, can further comprise light in the readjustment light input circuit 100 and turn-off unit 190, but the utility model is not as limit.
Shown in the 1st figure, input IN1 lotus root is connected to input node N1. output OUT1 and exports follow-up light modulation drive circuit (figure does not show) to the transmission analog voltage.Constant current source 120 lotus roots are connected to input node N1.Voltage-adjusting unit 140 lotus roots are connected between input node N1 and the earth terminal.Filter unit 160 lotus roots are connected between input node N1 and the earth terminal.180 lotus roots are connected between filter unit 160 and the output OUT1 in output slow-action unit.The end lotus root that light turn-offs unit 190 is connected between filter unit 160 and the output slow-action unit 180, and light turn-offs unit 190 other end lotus roots and is connected between feedback circuit 200 and the system voltage end Vcc.
Please consult the 2nd figure in the lump, the circuit diagram during for multiple light input circuit 100 corresponding analog voltage input Va or PWM signal Vpwm.
Shown in the 2nd figure, to implement in the row in this, output slow-action unit 180 comprises an operational amplifier OP1, implements in the row in this, and operational amplifier OP1 is mainly in order to form voltage with the usefulness of lotus root device as the output slow-action.
Preferably; Filter unit 160 comprises filter resistance R1 and filter capacitor C1; Filter resistance R1 lotus root is connected between input node N1 and the output slow-action unit 180; The end of filter capacitor C1 is electrically connected between filter resistance R1 and the output slow-action unit 180, and the other end of filter capacitor C1 is electrically connected to earth terminal.
Preferably, implement in the row at this, voltage-adjusting unit 140 comprises the long-pending diode 9 (zener diode) of receiving, and implementing can adopt breakdown voltage in the row in this is the long-pending diode of receiving of 11V.
Preferably, implement in the row at this, multiple light modulation input circuit 100 further comprises a current-limiting resistance R2 and input filter capacitor C2; Current-limiting resistance R2 lotus root is connected between input IN1 and the input node N1; The end of input filter capacitor C2 is electrically connected between input IN1 and the current-limiting resistance R2, and the other end of filter capacitor C2 is electrically connected to earth terminal, in the practical application; Input filter capacitor C2 one capacitance can roughly be about 1000pF, but the utility model is not as limit.
When input IN1 connect be analog voltage input Va (like 1～10V decide the voltage input) time; At this moment; The analog voltage input Va that direct current is decided voltage can be promoted to the voltage quasi position that analog voltage is imported Va with the voltage quasi position of input node N1; The gain (uni-gain) that waits of operational amplifier OP1 is handled in the slow-action of the process output subsequently unit 180, and formation exports output OUT1 to through analog voltage.That is to say that this analog voltage output of implementing on the output OUT1 in the row equates that with former analog voltage input Va thus, analog voltage output promptly is proportional to the voltage quasi position of analog voltage input Va haply.
When input IN1 connect be PWM signal Vpwm (like the PWM input of 12～24V) time; This moment, PWM signal Vpwm received that the long-pending breakdown voltage (in these row, being 11V) of receiving diode limits in the voltage-adjusting unit 140; The signal voltage of PWM signal Vpwm (is in this enforcement row through voltage-adjusting unit 140 earlier; Breakdown voltage is the long-pending diode of receiving of 11V) handle to about 11V; The RC filter of forming via filter resistance R1 in the filter unit 160 and filter capacitor C1 again, the analog voltage that is converted into the duty ratio (duty cycle) that is proportional to PWM is exported.
In addition, please participate in the 3rd figure, the circuit diagram during for multiple light modulation input circuit 100 corresponding variable resistance R a.Shown in the 3rd figure, lotus root meets variable resistor Ra between input IN1 and the earth terminal.
When input IN1 lotus root met variable resistor Ra, the resistance that the analog voltage that produces for available technology adopting electric resistance partial pressure mode is come in and gone out with variable resistor Ra presented nonlinear problem.The utility model carries out voltage sampling through constant current source 120 corresponding variable resistance R a; The electric current I c that decides that constant current source 120 produces goes up the variable input voltage of formation through variable resistor Va and in input IN1; See through Ohm's law V=I*R and can know that it is Ic*Ra that input IN1 goes up the variable input voltage size that forms.Hence one can see that, when Ic is that variable input voltage is linear in the value of variable resistor Ra when deciding electric current.Linear with the resistance of variable resistor Ra.
In the practical application; Variable resistor Va can adopt the variable resistor of 100k ohm, if will produce the voltage of 0-10V at variable resistor Va two ends, this decides electric current must be 100uA; Reference voltage end Vref capable of using provides 2.5V voltage to produce to decide electric current in these row, but the utility model this does not exceed.See also the 4th figure, its illustrate constant current source 120 respectively the current characteristics mould of deciding under different variable resistor Va resistances doubt figure,
As the 4th figure shown in, the output current of constant current source 120 can remain on 100uA+/-0.5uA about.Produce 0-10V voltage, i.e. variable input voltage on the input IN1 at variable resistor Va two ends.Then; Variable input voltage is just gone up in output OUT1 through output slow-action unit 180 and is formed analog voltage output; It forms analog voltage and exports the Lu Jingyu flow process to; Promptly with aforementioned paragraphs in disclose when adopting analog voltage input Va similarly, please participate in the 2nd figure and the relevant detailed description when adopting analog voltage to import Va, do not give unnecessary details in addition at this.
In addition, when input IN1 is open circuit when (floating), constant current source 120 can flow to input filter capacitor C2 and filter capacitor C1, and capacitance voltage is improved, and the long-pending simultaneously terminal voltage of receiving diode also can improve, and finally receives the breakdown voltage 11V of diode to amassing.Therefore, this circuit is just handled with the PWM signal form if the PWM signal of passive (open collector) mode of employing also can produce the PWM voltage waveform signal at input afterwards.Be noted that wherein when input filter capacitor and select for use when excessive that the time of deciding 120 pairs of input filter capacitor C2 chargings of electric current can increase, and causes nonideal PWM waveform, in the practical application, selecting for use of input filter capacitor C2 can 1000Pf be reference value.
In addition; Preferably; The multiple light modulation input circuit 100 of the utility model is except to analog voltage input, when PWM signal end IN1 is short circuit (short) or utmost point low-voltage; Then further add the function that light is cut-off, by this, can realize seeing through function, the saving energy consumption of the direct switch of brightness adjustment control and avoid fluorescent tube that the bright situation of irritating bright back light takes place under low voltage drive.Implement in the row in this, when the voltage quasi position of this input IN1 during less than fiducial value (for example 0.6V), but this light turn-offs just conducting of unit 190, and feedback circuit 200 is cut-off.
Then, please with reference to 5A figure to 5D figure, be the experimental result picture that between the analog voltage output of the multiple light modulation input circuit of the utility model under the different input patterns and various input, concerns.Scheme to know that it is linear that various different input mode output voltages are input (voltage, resistance, duty) to 5D by 5A figure.With the reference command of this linear anaiog signal as light modulation module or drive circuit, can realize the dimming function of multiple input, in the practical application, (light emitting diode is on light adjusting circuit LED) can be widely used in light-emittingdiode.
In sum; The purpose of its design of multiple light modulation input circuit that the utility model proposes is; Convert polytype input signal into analog voltage output, with brightness adjustment control signal as light fixture rise light drive circuit, and; The analog voltage output of output must be for linear and be proportional to the input voltage of analog voltage, the resistance value of the duty ratio of pulse width modulation signal or variable resistor resistance.
In sum; Embodiment only is the preferred optimum implementation of the utility model; Unintelligible is that the protection range of the utility model is limited; For adjustment that does not exceed the utility model technical scheme and the change that the technical work personnel of this area do according to the utility model, should think and drop in the protection range of the utility model.
Claims (9)
1. multiple light modulation input circuit, in order to produce analog voltage to a light modulation drive circuit, it is characterized in that: said multiple light modulation input circuit comprises:
One input, lotus root are connected to an input node;
One output is used to transmit said analog voltage output;
One constant current source, lotus root are connected to said input node;
One voltage-adjusting unit, lotus root are connected between a said input node and the earth terminal;
One filter unit, lotus root are connected between a said input node and the earth terminal;
And an output slow-action unit, lotus root is connected between said filter unit and the said output;
Wherein, when said input was imported analog voltage input, said analog voltage output was proportional to a voltage quasi position of said analog voltage input; When said input was imported a PWM signal, said analog voltage output was proportional to a duty ratio of said PWM signal; When lotus root connect a variable resistor between a said input and the earth terminal, said analog voltage output was proportional to a said variable-resistance resistance.
2. multiple light modulation input circuit as claimed in claim 1 is characterized in that: said output slow-action unit comprises an operational amplifier; Said operational amplifier forms a voltage with the lotus root device.
3. multiple light modulation input circuit as claimed in claim 1 is characterized in that: said filter unit comprises a filter resistance and a filter capacitor, and said filter resistance lotus root is connected between said input node and the said output slow-action unit; One end of said filter capacitor is electrically connected between said filter resistance and the said output slow-action unit, and the other end of said filter unit electrically connects an earth terminal.
4. multiple light modulation input circuit as claimed in claim 1; It is characterized in that: said voltage-adjusting unit comprises a long-pending diode of receiving; When said input was imported said PWM signal, said voltage-adjusting unit was used for said PWM voltage of signals maximum is handled to the said long-pending breakdown voltage of receiving diode.
5. multiple light modulation input circuit as claimed in claim 1 is characterized in that: further comprise a current-limiting resistance and an input filter capacitor, said current-limiting resistance lotus root is connected between said input and the said input node; One end of said input filter capacitor is electrically connected between said input and the said current-limiting resistance, and the other end of said filter capacitor is electrically connected to an earth terminal.
6. multiple light modulation input circuit as claimed in claim 1 is characterized in that: the capacitance of said input filter capacitor is 1000pF.
7. multiple light modulation input circuit as claimed in claim 1; It is characterized in that: when lotus root connects said variable resistor between a said input and the earth terminal; Said constant current source produces certain electric current, saidly decides electric current and forms a variable input voltage through said variable resistor and on said input.
8. multiple light modulation input circuit as claimed in claim 1 is characterized in that: comprise that further a light turn-offs the unit, the end lotus root that said light turn-offs the unit is connected between said filter unit and the said output slow-action unit.
9. multiple light modulation input circuit as claimed in claim 9 is characterized in that: said light turn-offs unit other end lotus root and is connected between a feedback circuit and the system voltage end, when the voltage quasi position of said input during less than a fiducial value; Said light turn-offs the unit said feedback circuit is turn-offed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201625806U CN202276494U (en) | 2011-05-13 | 2011-05-13 | Multiple dimming input circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201625806U CN202276494U (en) | 2011-05-13 | 2011-05-13 | Multiple dimming input circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202276494U true CN202276494U (en) | 2012-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201625806U Expired - Fee Related CN202276494U (en) | 2011-05-13 | 2011-05-13 | Multiple dimming input circuit |
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| Country | Link |
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| CN (1) | CN202276494U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102316632A (en) * | 2011-01-27 | 2012-01-11 | 明纬(广州)电子有限公司 | Multiple light modulation input circuit |
| EP3030051A1 (en) * | 2014-12-04 | 2016-06-08 | Yu Jing Energy Technology Co., Ltd | Signal converter circuit for dimming of a light source |
| CN109963373A (en) * | 2017-12-22 | 2019-07-02 | 明纬(广州)电子有限公司 | A kind of dimming input circuit |
-
2011
- 2011-05-13 CN CN2011201625806U patent/CN202276494U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102316632A (en) * | 2011-01-27 | 2012-01-11 | 明纬(广州)电子有限公司 | Multiple light modulation input circuit |
| CN102316632B (en) * | 2011-01-27 | 2014-12-31 | 明纬(广州)电子有限公司 | Multiple light modulation input circuit |
| EP3030051A1 (en) * | 2014-12-04 | 2016-06-08 | Yu Jing Energy Technology Co., Ltd | Signal converter circuit for dimming of a light source |
| CN109963373A (en) * | 2017-12-22 | 2019-07-02 | 明纬(广州)电子有限公司 | A kind of dimming input circuit |
| CN109963373B (en) * | 2017-12-22 | 2021-11-09 | 明纬(广州)电子有限公司 | Dimming input circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Mean Well (guangzhou) Electronic Corp. Document name: Notification of Termination of Patent Right |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120613 Termination date: 20150513 |
|
| EXPY | Termination of patent right or utility model |