CN107046746B - A kind of LED light adjusting control circuit - Google Patents
A kind of LED light adjusting control circuit Download PDFInfo
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- CN107046746B CN107046746B CN201610083182.2A CN201610083182A CN107046746B CN 107046746 B CN107046746 B CN 107046746B CN 201610083182 A CN201610083182 A CN 201610083182A CN 107046746 B CN107046746 B CN 107046746B
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- led light
- light string
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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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Abstract
This application discloses a kind of LED light adjusting control circuits for adjusting input voltage range, and to export the half sine wave voltage of periodic cycle by an input voltage regulation module；And the first LED light string and the second LED light string current branch adjustment module being connected with the input voltage regulation module, it can change to form different series-parallel current branch with input voltage, in addition capacitor C1 is parallel with first LED light string and the second LED light string current branch adjustment module, voltage light modulation low frequency can be achieved to dodge, and the LED light adjusting control circuit of the application is adapted to wide range input, and High Power Factor, structure are simple, easy to operate, it is at low cost, it is easy to accomplish.
Description
Technical field
The present invention relates to led light technology fields, more particularly, it relates to a kind of LED light adjusting control circuit.
Background technique
The appearance of LED light greatly reduces electric power required for illumination, and the LED light of same wattage, required electric power only has white
The 1/10 of vehement light bulb, while LED light has many advantages, such as long service life, environmental protection, non-maintaining, the rapid position for replacing incandescent lamp.
And as continuous popularize of LED illumination proposes increasingly higher demands to light modulation and control technology, it uses at present
Dimming mode the problem of having nothing in common with each other, for example, using commercial illumination light adjusting system, by a whole set of control system to entirety
The illuminating effect in region carries out real-time control, but control mode is complicated, higher cost, and uses switch on wall mode, realizes
Dimming scope it is relatively narrow, for using remote control light modulating control mode, need to use signal transmission module and more complicated
LED power driver realizes that circuit is complex, and cost is also relatively expensive.
Summary of the invention
In view of the above problems, this application provides the LED light brightness adjustment control electricity that one kind partly or entirely solves the above problems
Road, circuit structure are simple, it is easy to accomplish adjust, required cost is relatively low, it can be achieved that voltage light modulation low frequency dodges, and has high power
Factor, efficient feature.
In order to solve the above-mentioned technical problem, the application adopts the following technical scheme that
A kind of LED light adjusting control circuit comprising:
Input voltage regulation module for adjusting input voltage range, and exports the half sine wave voltage of periodic cycle；
The first LED light string and the second LED light string current branch adjustment module being connected with the input voltage regulation module；
The capacitor C1 in parallel with first LED light string and the second LED light string current branch adjustment module；
Wherein as conduction voltage drop V of the minimum voltage on capacitor C1 less than the first LED light stringLED light string 1Or second LED light string
Conduction voltage drop VLED light string 2And the ceiling voltage on capacitor C1 is greater than the conduction voltage drop V of the first LED light stringLED light string 1Or the 2nd LED
The conduction voltage drop V of lamp stringLED light string 2, the first LED light string and the second LED light string turned in parallel；
When the minimum voltage on capacitor C1 is greater than the conduction voltage drop V of the first LED light stringLED light string 1Or second LED light string lead
Logical pressure drop VLED light string 2And the ceiling voltage on capacitor C1 is less than the sum of the first LED light string and the conduction voltage drop of the second LED light string,
First LED light string and the second LED light string turned in parallel；
When the minimum voltage on capacitor C1 is greater than the conduction voltage drop V of the first LED light stringLED light string 1Or second LED light string lead
Logical pressure drop VLED light string 2And the ceiling voltage on capacitor C1 is greater than the sum of the first LED light string and the conduction voltage drop of the second LED light string,
First LED light string and the second LED light string turned in parallel and series connection conducting work alternatively；
When the minimum voltage on capacitor C1 is greater than the sum of LED light string 1 and the conduction voltage drop of LED light string 2,1 He of LED light string
The series connection conducting of LED light string 2.
Optionally, first LED light string and the second LED light string current branch adjustment module specifically include:
According to the first LED light of the corresponding transformation lamplight brightness of voltage range variation of input voltage regulation module output
String and the second LED light string；
Drive the first LED constant current controller, the second LED constant current control of first LED light string and second LED light string
Device processed and third LED constant current controller；
Changed according to the input voltage regulation module output voltage range, with the first LED constant current controller, described
Second LED constant current controller and the third LED constant current controller adjust first LED light string and the 2nd LED together
The rectifier diode VD1 of the series-parallel relationship of lamp string；And adjust first LED light string and second LED light string work
Sampling resistor R1, R2, R3 of size of current；
Wherein, the output end of the input voltage regulation module respectively with the first LED light string anode and described first
The input terminal of LED constant current controller is connected, the input terminal of the first LED light string cathode and the second LED constant current controller
It is connected, the output end of the first LED constant current controller is connected with the anode of second LED light string, second LED light string
Cathode be connected with the end B of the second LED constant current controller, the input terminal of the third LED constant current controller and described the
The output end of two LED constant current controllers is connected, the cathode phase of the anode of the rectifier diode VD1 and first LED light string
Even, the cathode of the rectifier diode VD1 is connected with the end A of the first LED constant current controller, and the one of the sampling resistor R1
End is connected with the cathode of the rectifier diode VD1, and the other end is connected with the output end of the first LED constant current controller, described to adopt
One end of sample resistance R2 is connected with the cathode of second LED light string, the input of the other end and the third LED constant current controller
End is connected, and the one end the sampling resistor R3 is connected with the C-terminal of the third LED constant current controller, the other end and the 3rd LED
The output end of constant-current controller is connected；
The capacitor C1 is connected in parallel on the output end and the third LED constant current controller of the input voltage regulation module
Between output end；
Optionally, the input voltage regulation module specifically includes:
The voltage light modulator TD and rectifier bridge stack BR1 being connected with the voltage light modulator TD.
Optionally, the input voltage regulation module further include: power switch S0.
Optionally, the resistance value size of described sampling resistor R1, R2, R3 are as follows: R1 > R2 > R3.
Optionally, the first LED constant current controller, the second LED constant current controller and the third LED constant current control
The reference voltage of device processed is identical, and when the voltage of sampling resistor is more than reference voltage, constant-current controller is turned off.
Optionally, the lamp bead pressure resistance of first LED light string and second LED light string is identical with lamp bead quantity.
Optionally, between the output end of the second LED constant current controller and the input terminal of the third LED constant current controller
Also it is in series with third LED light string.
Optionally, first LED light string, second LED light string and the third LED light string lamp bead pressure resistance and
Lamp bead quantity is identical.
Optionally, the lamp bead quantity of first LED light string, second LED light string and the third LED light string is
Three.
According to a kind of LED light adjusting control circuit of the application, by an input voltage regulation module, for adjusting
Input voltage range, and export the half sine wave voltage of periodic cycle；And to be connected with the input voltage regulation module
One LED light string and the second LED light string current branch adjustment module, can change to form different series-parallel electric current branch with input voltage
In addition road is parallel with capacitor C1, it can be achieved that voltage with first LED light string and the second LED light string current branch adjustment module
It dims low frequency to dodge, and the LED light adjusting control circuit of the application is adapted to wide range input, High Power Factor, structure
Simply, easy to operate, it is at low cost, it is easy to accomplish.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in invention can also be obtained according to these attached drawings other for those of ordinary skill in the art
Attached drawing.
Fig. 1 is a kind of specific embodiment electrical block diagram of LED light adjusting control circuit according to the present invention；
Fig. 2 is a kind of voltage wave of input voltage vin in specific embodiment of LED light adjusting control circuit according to the present invention
Shape figure and LED light string current waveform figure.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art's every other embodiment obtained belong to what the present invention protected
Range.
Core of the invention is for adjusting input voltage range, and to export by an input voltage regulation module
The half sine wave voltage of periodic cycle；And the first LED light string and the second LED light being connected with the input voltage regulation module
Go here and there current branch adjustment module, can change to form different series-parallel current branch with input voltage, in addition with the first LED
Lamp string and the second LED light string current branch adjustment module are parallel with capacitor C1；Wherein when the minimum voltage on capacitor C1 is less than
The conduction voltage drop V of one LED light stringLED light string 1Or second LED light string conduction voltage drop VLED light string 2And the ceiling voltage on capacitor C1 is big
In the conduction voltage drop V of the first LED light stringLED light string 1Or second LED light string conduction voltage drop VLED light string 2, the first LED light string and second
LED light string turned in parallel；
When the minimum voltage on capacitor C1 is greater than the conduction voltage drop V of the first LED light stringLED light string 1Or second LED light string lead
Logical pressure drop VLED light string 2And the ceiling voltage on capacitor C1 is less than the sum of the first LED light string and the conduction voltage drop of the second LED light string,
First LED light string and the second LED light string turned in parallel；
When the minimum voltage on capacitor C1 is greater than the conduction voltage drop V of the first LED light stringLED light string 1Or second LED light string lead
Logical pressure drop VLED light string 2And the ceiling voltage on capacitor C1 is greater than the sum of the first LED light string and the conduction voltage drop of the second LED light string,
First LED light string and the second LED light string turned in parallel and series connection conducting work alternatively；
When the minimum voltage on capacitor C1 is greater than the sum of LED light string 1 and the conduction voltage drop of LED light string 2,1 He of LED light string
The series connection conducting of LED light string 2, the following detailed description of.
With reference to Fig. 1, which is that a kind of circuit structure of the specific embodiment of LED light adjusting control circuit shows according to the present invention
It is intended to.
The present embodiment is the specific embodiment realizing voltage light modulation low frequency and dodging, LED light adjusting control circuit in the present embodiment
It specifically includes that
Power switch S0, voltage light modulator TD, rectifier bridge stack BR1, capacitor C1, three LED light strings: LED light string 1 (i.e.
One LED light string), LED light string 2 (i.e. the second LED light string), LED light string 3 (i.e. third LED light string), three LED constant current controllers:
LED constant current controller 1 (i.e. the first LED constant current controller), LED constant current controller 2 (i.e. the second LED constant current controller), LED are permanent
Stream controller 3 (i.e. third LED constant current controller), sampling resistor R1, R2, R3 and rectifier diode VD1, wherein power switch
S0, voltage light modulator TD form input voltage regulation module, to adjust input voltage range.
When specific implementation, the input terminal of the voltage light modulator TD is connect by power switch S0 with power supply, voltage
An output end of light modulator TD is connected with an AC input of rectifier bridge stack BR1, another output of voltage light modulator TD
End is connected with another AC input of rectifier bridge stack BR1, the positive output end of the rectifier bridge stack BR1 and the anode of capacitor C1
It is connected, while the positive output end of rectifier bridge stack BR1 is connected with one end of the anode of LED light string 1 and LED constant current controller 1, it is whole
The negative output end of stream bridge heap BR1 is grounded after connecting with the cathode of capacitor C1；The cathode and rectifier diode of the LED light string 1
The anode of VD1 connects, and rectifier diode VD1 cathode is connect with the end A of LED constant current controller 1, while rectifier diode VD1
Cathode is connected by resistance R1 with the other end of LED constant current controller 1, while the other end and LED light of LED constant current controller 1
The anode of string 2 is connected, the end B of the cathode connection LED constant current controller 2 of LED light string 2, one end of LED constant current controller 2 and LED
The cathode of lamp string 1 is connected, and the other end of LED constant current controller 2 is connected by resistance R2 with the end B, while LED constant current controller 2
The other end be connected with the anode of LED light string 3, the cathode of LED light string 3 is connected with one end of LED constant current controller 3, LED constant current
The other end of controller 3 is connected by resistance R3 with the C-terminal of LED constant current controller 3, while the other end of LED constant current controller 3
Ground connection.
The following detailed description of the course of work of the LED light adjusting control circuit of the present embodiment, it is described as follows:
Voltage light modulator TD is adjusted, due to capacitor C1's after power switch is closed in the present embodiment combined with Figure 1 and Figure 2,
Charge and discharge electro ultrafiltration, so the minimum voltage of capacitor C1 wants much higher compared to the minimum voltage of input voltage；If on capacitor C1
Minimum voltage is less than the conduction voltage drop V of LED light string 1LED light string 1Or the conduction voltage drop V of LED light string 2LED light string 2And on capacitor C1 most
High voltage is greater than the conduction voltage drop V of LED light string 1LED light string 1Or the conduction voltage drop V of LED light string 2LED light string 2, LED light string 1 and LED light string
2 turned in parallel, waveform such as Fig. 2-a of voltage and parallel connection LED string on capacitor C1；Continue to adjust voltage light modulator TD raising input
Voltage, the minimum voltage on capacitor C1 are greater than the conduction voltage drop V of LED light string 1LED light string 1Or the conduction voltage drop V of LED light string 2LED light string 2
And the ceiling voltage on capacitor C1 is less than the sum of LED light string 1 and the conduction voltage drop of LED light string 2, LED light string 1 and LED light string 2
Turned in parallel, waveform such as Fig. 2-a of voltage and parallel connection LED string on capacitor C1, current value are the continuous linear of I1+I2, LED light
String is without strobe light emission；Continue to adjust voltage light modulator TD raising input voltage, the minimum voltage on capacitor C1 is greater than LED light string 1
Conduction voltage drop VLED light string 1Or the conduction voltage drop V of LED light string 2LED light string 2And the ceiling voltage on capacitor C1 is greater than 1 He of LED light string
The sum of the conduction voltage drop of LED light string 2, LED light string 1 and 2 turned in parallel of LED light string and series connection conducting work alternatively, on capacitor C1
Voltage and parallel connection LED string waveform such as Fig. 2-b, electric current alternately changes in I1+I2 and I3, and the luminous stroboscopic of LED light string is smaller；
Continue to adjust voltage light modulator TD and improve input voltage, the minimum voltage on capacitor C1 is greater than leading for LED light string 1 and LED light string 2
The sum of logical pressure drop, LED light string 1 and the series connection of LED light string 2 are connected, waveform such as Fig. 2-a of voltage and parallel connection LED string on capacitor C1,
Current value is the straight line of I3, and LED light string is without strobe light emission；When adjust voltage light modulator TD reduce input voltage be control process just
Well on the contrary, which is not described herein again.
It should be noted that by simply adjusting adjusting of the input voltage to realization to LED light brightness in the present embodiment,
And stroboscopic phenomenon can be eliminated by electrolytic capacitor C1, and equally also there is wide range input, structure is simple, and it is easy to operate, at
This is low, it is easy to accomplish the features such as.
In above-mentioned provided specification, numerous specific details are set forth.It is to be appreciated, however, that implementation of the invention
Example can be practiced without these specific details.In some instances, well known method, structure is not been shown in detail
And technology, so as not to obscure the understanding of this specification.
Similarly, it should be understood that in order to simplify the disclosure and help to understand one or more of the various inventive aspects,
Above in the description of exemplary embodiment of the present invention, each feature of the invention is grouped together into single implementation sometimes
In example, figure or descriptions thereof.However, the disclosed method should not be interpreted as reflecting the following intention: i.e. required to protect
Shield the present invention claims features more more than feature expressly recited in each claim.More precisely, as following
Claims reflect as, inventive aspect is all features less than single embodiment disclosed above.Therefore,
Thus the claims for following specific embodiment are expressly incorporated in the specific embodiment, wherein each claim itself
All as a separate embodiment of the present invention.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and ability
Field technique personnel can be designed alternative embodiment without departing from the scope of the appended claims.
Claims (10)
1. a kind of LED light adjusting control circuit characterized by comprising input voltage regulation module, for adjusting input voltage
Range, and export the half sine wave voltage of periodic cycle；The first LED light string for being connected with the input voltage regulation module and
Second LED light string current branch adjustment module；Simultaneously with first LED light string and the second LED light string current branch adjustment module
The capacitor C1 of connection；Wherein as conduction voltage drop V of the minimum voltage on capacitor C1 less than the first LED light stringFirst LED light stringOr the 2nd LED
The conduction voltage drop V of lamp stringSecond LED light stringAnd the ceiling voltage on capacitor C1 is greater than the conduction voltage drop V of the first LED light stringFirst LED light stringOr
The conduction voltage drop V of second LED light stringSecond LED light string, the first LED light string and the second LED light string turned in parallel；When on capacitor C1 most
Small voltage is greater than the conduction voltage drop V of the first LED light stringFirst LED light stringOr second LED light string conduction voltage drop VSecond LED light stringAnd capacitor
Ceiling voltage on C1 is less than the sum of the first LED light string and the conduction voltage drop of the second LED light string, the first LED light string and the 2nd LED
Lamp string turned in parallel；When the minimum voltage on capacitor C1 is greater than the conduction voltage drop V of the first LED light stringFirst LED light stringOr second LED light
The conduction voltage drop V of stringSecond LED light stringAnd the ceiling voltage on capacitor C1 is greater than the conducting pressure of the first LED light string and the second LED light string
The sum of drop, the first LED light string and the second LED light string turned in parallel and series connection conducting work alternatively；When the minimum electricity on capacitor C1
Pressure is greater than the sum of the first LED light string and the conduction voltage drop of the second LED light string, and the first LED light string and the series connection of the second LED light string are led
It is logical.
2. circuit according to claim 1, which is characterized in that first LED light string and the second LED light string electric current branch
Road adjustment module specifically includes: according to the corresponding transformation lamplight brightness of voltage range variation of input voltage regulation module output
The first LED light string and the second LED light string；Drive the first LED constant current of first LED light string and second LED light string
Controller, the second LED constant current controller and third LED constant current controller；According to the input voltage regulation module output voltage
Range, with the first LED constant current controller, the second LED constant current controller and the third LED constant current controller
The rectifier diode VD1 of the series-parallel relationship of first LED light string and second LED light string is adjusted together；And it adjusts
Sampling resistor R1, R2, R3 of first LED light string and the second LED light string operating current size；Wherein, the input
The output end of the voltage regulator module input terminal with the first LED light string anode and the first LED constant current controller respectively
It is connected, the first LED light string cathode is connected with the input terminal of the second LED constant current controller, the first LED constant current control
The output end of device processed is connected with the anode of second LED light string, and the cathode of second LED light string and the 2nd LED are permanent
The end B of stream controller is connected, the output of the input terminal of the third LED constant current controller and the second LED constant current controller
End is connected, and the anode of the rectifier diode VD1 is connected with the cathode of first LED light string, the rectifier diode VD1's
Cathode is connected with the end A of the first LED constant current controller, one end of the sampling resistor R1 and the rectifier diode VD1
Cathode be connected, the other end is connected with the output end of the first LED constant current controller, one end of the sampling resistor R2 and described the
The cathode of two LED light strings is connected, and the other end is connected with the input terminal of the third LED constant current controller, the sampling resistor R3
One end is connected with the C-terminal of the third LED constant current controller, the output end phase of the other end and the third LED constant current controller
Even；The capacitor C1 is connected in parallel on the output end of the input voltage regulation module and the output of the third LED constant current controller
Between end.
3. circuit according to claim 1, which is characterized in that the input voltage regulation module specifically includes: voltage
The light modulator TD and rectifier bridge stack BR1 being connected with the voltage light modulator TD.
4. circuit according to claim 3, which is characterized in that the input voltage regulation module further include: power supply is opened
Close S0.
5. circuit according to claim 2, which is characterized in that the resistance value size of described sampling resistor R1, R2, R3 are as follows: R1
> R2 > R3.
6. circuit according to claim 2, which is characterized in that the first LED constant current controller, the 2nd LED are permanent
Stream controller is identical with the reference voltage of the third LED constant current controller, when the voltage of sampling resistor is more than reference voltage
Constant-current controller shutdown.
7. circuit according to claim 2, which is characterized in that the lamp of first LED light string and second LED light string
Pearl pressure resistance is identical with lamp bead quantity.
8. circuit according to claim 7, which is characterized in that in the output end of the second LED constant current controller and described the
Third LED light string is also in series between the input terminal of three LED constant current controllers.
9. circuit according to claim 8, which is characterized in that first LED light string, second LED light string and
The lamp bead pressure resistance of the third LED light string is identical with lamp bead quantity.
10. circuit according to claim 9, which is characterized in that first LED light string, second LED light string and
The lamp bead quantity of the third LED light string is three.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610083182.2A CN107046746B (en) | 2016-02-06 | 2016-02-06 | A kind of LED light adjusting control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610083182.2A CN107046746B (en) | 2016-02-06 | 2016-02-06 | A kind of LED light adjusting control circuit |
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| CN107046746B true CN107046746B (en) | 2019-03-12 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106793297A (en) * | 2016-12-23 | 2017-05-31 | 广州市莱帝亚照明股份有限公司 | A kind of high-voltage LED light bar |
| CN107660019A (en) * | 2017-08-31 | 2018-02-02 | 开发晶照明（厦门）有限公司 | Light source and light emitting module |
| CN107896406B (en) * | 2017-12-29 | 2019-08-16 | 东莞艾笛森光电有限公司 | Synchronous dimming driving circuit |
| CN109831844B (en) * | 2018-12-18 | 2024-03-22 | 陕西亚成微电子股份有限公司 | Stroboflash-free high-power-factor LED driving method and circuit |
| CN211557553U (en) * | 2019-06-06 | 2020-09-22 | 上海路傲电子科技有限公司 | Chip driving circuit, chip, linear constant current driving circuit and lighting device |
| CN112566320B (en) * | 2020-12-22 | 2023-02-10 | 安徽亮亮电子科技有限公司 | Method for realizing high power factor and low stroboflash |
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| JP2014505328A (en) * | 2010-12-20 | 2014-02-27 | ドン‐ウォン リ | AC drive LED lighting device supporting two types of commercial power supply |
| CN104797037A (en) * | 2014-01-16 | 2015-07-22 | 安恩科技股份有限公司 | Low-flicker light-emitting diode lighting device having multiple driving stages |
| CN205726501U (en) * | 2016-02-06 | 2016-11-23 | 陕西亚成微电子股份有限公司 | A kind of LED adjusting control circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014505328A (en) * | 2010-12-20 | 2014-02-27 | ドン‐ウォン リ | AC drive LED lighting device supporting two types of commercial power supply |
| CN104797037A (en) * | 2014-01-16 | 2015-07-22 | 安恩科技股份有限公司 | Low-flicker light-emitting diode lighting device having multiple driving stages |
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