CN205864808U - A kind of LED street lamp light adjusting circuit - Google Patents
A kind of LED street lamp light adjusting circuit Download PDFInfo
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- CN205864808U CN205864808U CN201620866417.0U CN201620866417U CN205864808U CN 205864808 U CN205864808 U CN 205864808U CN 201620866417 U CN201620866417 U CN 201620866417U CN 205864808 U CN205864808 U CN 205864808U
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- light
- adjusting module
- pwm
- audion
- optocoupler
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Abstract
The utility model discloses a kind of LED street lamp light adjusting circuit, including analog voltage light-adjusting module and PWM light-adjusting module, the input termination analog voltage Regulation Control end of analog voltage light-adjusting module, the outfan of analog voltage light-adjusting module is connected with the power end of PWM light-adjusting module, the control termination PWM of described PWM light-adjusting module controls end and connects, and the outfan of described PWM light-adjusting module is connected with the control end of LED drive power.This utility model controls analog voltage light-adjusting module by the control signal of analog voltage Regulation Control end input can form two groups of voltages, and the pwm signal control PWM light-adjusting module generation light modulation analog voltage of end input is controlled by PWM, export the control end to LED drive power, control the brightness of LED.Therefore can realize analog voltage and the compatibility of PWM two kinds of brightness adjustment control modes of control in this utility model, thus be applicable to the brightness adjustment control of all kinds of LED power driver.
Description
Technical field
This utility model design street illumination field, specifically says it is a kind of LED street lamp light adjusting circuit.
Background technology
The brightness adjustment control mode of LED power driver has 1-10V analog voltage and 5V PWM to control two kinds, traditional circuit
The most only support a kind of mode, now need to design the LED street lamp light modulation of the most compatible above two brightness adjustment control mode of a kind of energy
Circuit.
Utility model content
In order to solve problems of the prior art, this utility model provides a kind of LED street lamp light adjusting circuit, it is possible to
The most compatible above two control mode, it is adaptable to the brightness adjustment control of all kinds of LED power drivers.
To achieve these goals, the technical scheme that this utility model is used is as follows: a kind of LED street lamp light adjusting circuit,
Including analog voltage light-adjusting module and PWM light-adjusting module, it is characterised in that described analog voltage light-adjusting module includes a switch electricity
Source chip, the input of switching power source chip is connected with external input power, and the input of described switching power source chip is by electricity
Resistance is connected with the Enable Pin of described switching power source chip, and the outfan of described switching power source chip is adjusted with PWM by filter circuit
Optical module power end connects, and the control termination PWM of described PWM light-adjusting module controls end and connects, the output of described PWM light-adjusting module
End is connected with LED drive power, and described switching power source chip is additionally provided with a feedback end, and described switching power source chip feedback end leads to
Crossing feedback resistance to be connected with PWM light-adjusting module power end, described switching power source chip feedback end passes through the first resistance eutral grounding, described
The feedback end of switching power source chip also positive output end with the first optocoupler is connected, and the negative output terminal of the first optocoupler passes through the second resistance
Ground connection, the positive input termination analog voltage Regulation Control end of the first optocoupler, the negative input end ground connection of the first optocoupler.
According to preferred embodiment of the present utility model, described PWM light-adjusting module includes the second optocoupler, described second optocoupler
Positive input terminal controls end by the 3rd resistance with PWM and is connected, the negative input end ground connection of described second optocoupler, described second optocoupler
Positive output end is connected with PWM light-adjusting module power end by the 4th resistance, the positive output end of described second optocoupler and the first electric capacity
One end connect, the base stage of the other end of the first electric capacity and the first audion and the second audion connects, the first audion
Colelctor electrode connects PWM light-adjusting module power end, and the emitter stage of the first audion and the emitter stage of the second audion connect, the two or three pole
The grounded collector of pipe, connects between the collector and emitter of the second audion and has the 5th resistance, the transmitting of the first audion
Pole is connected with LED drive power by the 6th resistance, and the base stage of the first audion and the second audion is also by the 7th resistance
Ground connection.
Analog voltage light-adjusting module of the present utility model forms two groups of voltage voltage stabilizing outputs, PWM light-adjusting module generate mould
Intend voltage output, export the control end to LED drive power, control the brightness of LED.Inputted by analog voltage Regulation Control end
Control signal control analog voltage light-adjusting module and can form two groups of voltages, and control the pwm signal of end input by PWM and control
PWM light-adjusting module generates light modulation analog voltage, exports the control end to LED drive power, controls the brightness of LED.Therefore at this
Utility model can realize analog voltage and the compatibility of PWM two kinds of brightness adjustment control modes of control, thus be applicable to all kinds of LED electricity
The brightness adjustment control of Source drive.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present utility model.
Fig. 2 is the circuit diagram of analog voltage light-adjusting module.
Fig. 3 is the circuit diagram of PWM light-adjusting module.
Detailed description of the invention
With embodiment, this utility model is explained in detail below in conjunction with the accompanying drawings.
A kind of LED street lamp light adjusting circuit, including analog voltage light-adjusting module and PWM light-adjusting module, analog voltage light modulation mould
The input termination analog voltage Regulation Control end of block, the outfan of analog voltage light-adjusting module and the power end of PWM light-adjusting module
Connecting, the control termination PWM of described PWM light-adjusting module controls end and connects, and the outfan of described PWM light-adjusting module drives with LED
The control end of power supply U301 connects.Formed two groups of voltage voltage stabilizing outputs by analog voltage light-adjusting module, PWM light-adjusting module convert
Generation analog voltage exports, and exports the control end 1-2 pin to LED drive power U301, controls the brightness of LED.
As in figure 2 it is shown, described analog voltage light-adjusting module includes a switching power source chip U101, switching power source chip U101
Input VIN be connected with external input power VC, the input VIN of described switching power source chip U101 by resistance R103 with
Enable Pin EN of described switching power source chip U101 connects, the outfan of described switching power source chip U101 by filter circuit with
PWM light-adjusting module power end VDD connects, and described switching power source chip U101 is additionally provided with a feedback end FB, described Switching Power Supply
Chip U101 feedback end FB is connected by feedback resistance R105 and PWM light-adjusting module power end VDD, described switching power source chip
U101 feedback end FB pass through the first resistance R101 ground connection, the feedback end FB of described switching power source chip U101 also with the first optocoupler
The positive output end of OP101 connects, and the negative output terminal of the first optocoupler OP101 passes through the second resistance R102 ground connection, the first optocoupler OP101
Positive input terminal connect analog voltage Regulation Control end CTR, the negative input end ground connection of the first optocoupler OP101 by resistance R104.
Described filter circuit includes that diode D101, the negative pole of diode D101 export with described switching power source chip U101
End SW connects, and the plus earth of described diode D101, the negative pole of described diode D101 is connected with one end of inductance L101, institute
The positive pole stating diode D101 is connected with the other end of the second electric capacity C102 and the 3rd electric capacity C103 and inductance L101, described two poles
The negative pole of pipe D101 is connected with described switching power source chip U101 positive voltage terminal BST also by the 4th electric capacity C101.
According to preferred embodiment of the present utility model, described switching power source chip uses MP2451, the first optocoupler to use
LTV-816S。
External input power VC is by the 5 foot inputs of switching power source chip U101, defeated by 6 feet of switching power source chip U101
Going out, inductance L101 and the device such as the second electric capacity C102, the 3rd electric capacity C103 form LC filtering, output voltage of voltage regulation is adjusted to PWM
Optical module power end VDD.Formed sample circuit by feedback resistance R105, the first resistance R101, the second resistance R102 etc. again, control
The 3 feet i.e. voltage of feedback end of switching power source chip U101, thus control to export the voltage to PWM light-adjusting module power end VDD
Value.
Analog voltage Regulation Control end CTR, by controller output high level or low level, is controlled by the first optocoupler OP101
The size of divider resistance in sample circuit, determines to export the magnitude of voltage to PWM light-adjusting module power end VDD, when CTR is high level
Time, the magnitude of voltage of output to PWM light-adjusting module power end VDD is 10V, and when CTR is low level, output is to PWM light-adjusting module
The magnitude of voltage of power end VDD is 5V.
As it is shown on figure 3, described PWM light-adjusting module includes the second optocoupler OP201, the positive input of described second optocoupler OP201
Hold and be connected by the 3rd resistance R201 with PWM control end PWM, the negative input end ground connection of described second optocoupler OP201, described second
The positive output end of optocoupler OP201 is connected by the 4th resistance R202 and PWM light-adjusting module power end VDD, described second optocoupler
The positive output end of OP201 and one end of the first electric capacity C202 connect, the other end of the first electric capacity C202 and the first audion Q201
And second the base stage of audion Q202 connect, the colelctor electrode of the first audion Q201 meets PWM light-adjusting module power end VDD, the
The emitter stage of one audion Q201 and the emitter stage of the second audion Q202 connect, the grounded collector of the second audion Q202,
Connecting between the collector and emitter of the second audion Q202 and have the 5th resistance R205, the emitter stage of the first audion Q201 leads to
Cross the 6th resistance R204 to be connected with LED drive power, the base stage of the first audion Q201 and the second audion Q202 also by
7th resistance R203 ground connection.
According to preferred embodiment of the present utility model, the second optocoupler uses 6N137, the first audion to use 8050, second
Audion uses 8550.
Controller output pwm signal, by the second optocoupler OP201 isolation and amplifier, carries out signal coupling by the second electric capacity C202
Close.The on-off circuit of the first audion Q201 and the second audion Q202 composition mutual symmetry, major function is to be turned by pwm signal
Change the 10V output of simulation or the PWM output of 5V into.
Above content is to combine concrete preferred implementation further detailed description of the utility model, it is impossible to
Assert that this utility model is embodied as being confined to these explanations above-mentioned.Common skill for this utility model art
For art personnel, without departing from the concept of the premise utility, it is also possible to make some simple deduction or replace, all should
It is considered as belonging to protection domain of the present utility model.
Claims (5)
1. a LED street lamp light adjusting circuit, including analog voltage light-adjusting module and PWM light-adjusting module, it is characterised in that simulation electricity
The input termination analog voltage Regulation Control end of pressure light-adjusting module, the outfan of analog voltage light-adjusting module and PWM light-adjusting module
Power end connect, the control of described PWM light-adjusting module termination PWM controls end and connects, the outfan of described PWM light-adjusting module with
The control end of LED drive power connects.
2. LED street lamp light adjusting circuit as claimed in claim 1, it is characterised in that described analog voltage light-adjusting module includes
Switching power source chip, the input of switching power source chip is connected with external input power, the input of described switching power source chip
Be connected by the Enable Pin of resistance with described switching power source chip, the outfan of described switching power source chip by filter circuit with
PWM light-adjusting module power end connects, and described switching power source chip is additionally provided with a feedback end, described switching power source chip feedback end
Being connected with PWM light-adjusting module power end by feedback resistance, described switching power source chip feedback end passes through the first resistance eutral grounding, institute
Stating the feedback end of the switching power source chip positive output end also with the first optocoupler to be connected, the negative output terminal of the first optocoupler is by the second electricity
Resistance ground connection, the positive input termination analog voltage Regulation Control end of the first optocoupler, the negative input end ground connection of the first optocoupler.
3. LED street lamp light adjusting circuit as claimed in claim 2, it is characterised in that described PWM light-adjusting module includes the second light
Coupling, the positive input terminal of described second optocoupler controls end by the 3rd resistance with PWM and is connected, the negative input termination of described second optocoupler
Ground, the positive output end of described second optocoupler is connected with PWM light-adjusting module power end by the 4th resistance, and described second optocoupler is just
One end of outfan and the first electric capacity connects, and the other end of the first electric capacity and the base stage of the first audion and the second audion are even
Connecing, the colelctor electrode of the first audion connects PWM light-adjusting module power end, the emitter stage of the first audion and the transmitting of the second audion
Pole connects, the grounded collector of the second audion, and connecting between the collector and emitter of the second audion has the 5th resistance, the
The emitter stage of one audion is connected with LED drive power by the 6th resistance, the first audion and the base stage of the second audion
Also by the 7th resistance eutral grounding.
4. LED street lamp light adjusting circuit as claimed in claim 2, it is characterised in that described switching power source chip uses MP2451,
First optocoupler uses LTV-816S.
5. LED street lamp light adjusting circuit as claimed in claim 3, it is characterised in that the second optocoupler uses 6N137, the one or three pole
Pipe uses 8050, and the second audion uses 8550.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620866417.0U CN205864808U (en) | 2016-08-11 | 2016-08-11 | A kind of LED street lamp light adjusting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620866417.0U CN205864808U (en) | 2016-08-11 | 2016-08-11 | A kind of LED street lamp light adjusting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205864808U true CN205864808U (en) | 2017-01-04 |
Family
ID=57658175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620866417.0U Active CN205864808U (en) | 2016-08-11 | 2016-08-11 | A kind of LED street lamp light adjusting circuit |
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| CN (1) | CN205864808U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106922052A (en) * | 2017-03-22 | 2017-07-04 | 中山品上照明有限公司 | The LED control device that a kind of compatible voltage light modulation is dimmed with PWM |
| CN107579669A (en) * | 2017-09-18 | 2018-01-12 | 合肥华耀电子工业有限公司 | A kind of AC/DC output voltages regulated power supply |
-
2016
- 2016-08-11 CN CN201620866417.0U patent/CN205864808U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106922052A (en) * | 2017-03-22 | 2017-07-04 | 中山品上照明有限公司 | The LED control device that a kind of compatible voltage light modulation is dimmed with PWM |
| CN107579669A (en) * | 2017-09-18 | 2018-01-12 | 合肥华耀电子工业有限公司 | A kind of AC/DC output voltages regulated power supply |
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