CN107046746A - A kind of LED adjusting control circuit - Google Patents
A kind of LED adjusting control circuit Download PDFInfo
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- CN107046746A CN107046746A CN201610083182.2A CN201610083182A CN107046746A CN 107046746 A CN107046746 A CN 107046746A CN 201610083182 A CN201610083182 A CN 201610083182A CN 107046746 A CN107046746 A CN 107046746A
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- led
- led string
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- constant current
- current controller
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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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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
This application discloses a kind of LED adjusting control circuit, it for adjusting input voltage range, and exports the half sine wave voltage of periodic cycle by an input voltage regulation module；And the first LED string being connected with the input voltage regulation module and the second LED string current branch adjustment module, it can change to form different connection in series-parallel current branch with input voltage, in addition electric capacity C1 is parallel with the first LED string and the second LED string current branch adjustment module, voltage light modulation low frequency can be achieved to dodge, it is High Power Factor, simple in construction and the LED adjusting control circuit of the application is adapted to wide range input, it is easy to operate, cost is low, it is easy to accomplish.
Description
Technical field
The present invention relates to LED technical field, more particularly, it relates to which a kind of LED is dimmed
Control circuit.
Background technology
The appearance of LED, greatly reduces the electric power required for illumination, the LED of same wattage, institute
Need electric power there was only the 1/10 of incandescent lamp bulb, at the same LED there is long lifespan, it is environmental protection, non-maintaining,
The position of rapid substitution incandescent lamp.
And as the continuous popularization of LED illumination proposes higher and higher requirement to light modulation and control technology,
The problem of dimming mode used at present is had nothing in common with each other, for example, using commercial illumination light adjusting system, it leads to
A whole set of control system is crossed to control the illuminating effect of overall region in real time, but control mode is complicated,
Cost is higher, and uses switch on wall mode, and the dimming scope that it is realized is narrower, for being adjusted using remote control
Photocontrol mode, it needs to use signal transmission module, and complex LED power driver,
Realize that circuit is complex, cost is also relatively expensive.
The content of the invention
In view of the above problems, this application provides a kind of LED tune partly or entirely solved the above problems
Light control circuit, its circuit structure is simple, it is easy to accomplish regulation, required cost is relatively low, and voltage can be achieved
Low frequency is dimmed to dodge, and with High Power Factor, efficient feature.
In order to solve the above-mentioned technical problem, the application is adopted the following technical scheme that：
A kind of LED adjusting control circuit, it includes：
Input voltage regulation module, for adjusting input voltage range, and exports the semisinusoidal of periodic cycle
Wave voltage；
The first LED string being connected with the input voltage regulation module and the second LED string current branch are adjusted
Save module；
The electric capacity C1 in parallel with the first LED string and the second LED string current branch adjustment module；
Wherein when the minimum voltage on electric capacity C1 is less than the conduction voltage drop V of the first LED stringLED string 1Or second
The conduction voltage drop V of LED stringLED string 2And the ceiling voltage on electric capacity C1 is more than the conducting of the first LED string
Pressure drop VLED string 1Or second LED string conduction voltage drop VLED string 2, the first LED string and the second LED string
Turned in parallel；
When the minimum voltage on electric capacity C1 is more than the conduction voltage drop V of the first LED stringLED string 1Or second LED
The conduction voltage drop V of stringLED string 2And the ceiling voltage on electric capacity C1 is less than the first LED string and the 2nd LED
The conduction voltage drop sum of lamp string, the first LED string and the second LED connection in series-parallel conducting；
When the minimum voltage on electric capacity C1 is more than the conduction voltage drop V of the first LED stringLED string 1Or second LED
The conduction voltage drop V of stringLED string 2And the ceiling voltage on electric capacity C1 is more than the first LED string and the 2nd LED
The conduction voltage drop sum of lamp string, the first LED string and the second LED connection in series-parallel conducting and series connection conducting alternating
Work；
When the minimum voltage on electric capacity C1 is more than the conduction voltage drop sum of LED string 1 and LED string 2, LED
Lamp string 1 and the series connection conducting of LED string 2.
Alternatively, the first described LED string and the second LED string current branch adjustment module are specifically included：
The first of the corresponding conversion lamplight brightness of voltage range change exported according to the input voltage regulation module
LED string and the second LED string；
Drive the first LED string and the second LED string the first LED constant current controller, second
LED constant current controller and the 3rd LED constant current controller；
Changed according to the input voltage regulation module output voltage range, controlled with first LED constant current
Device, the second LED constant current controller and the 3rd LED constant current controller adjust the first LED together
Lamp string and the commutation diode VD1 of the connection in series-parallel relation of the second LED string；And regulation described first
Sampling resistor R1, R2, R3 of LED string and the second LED string operating current size；
Wherein, the output end of the input voltage regulation module respectively with the first LED string anode and institute
The input for stating the first LED constant current controller is connected, the first LED string negative electrode and the 2nd LED
The input of constant-current controller is connected, the output end of the first LED constant current controller and the 2nd LED
The anode of lamp string is connected, the B ends of the negative electrode of the second LED string and the second LED constant current controller
It is connected, the input of the 3rd LED constant current controller and the output end of the second LED constant current controller
It is connected, the anode of the commutation diode VD1 is connected with the negative electrode of the first LED string, the rectification
Diode VD1 negative electrode is connected with the A ends of the first LED constant current controller, the sampling resistor R1's
One end is connected with the negative electrode of the commutation diode VD1, the output of the other end and the first LED constant current controller
End is connected, and one end of the sampling resistor R2 is connected with the negative electrode of the second LED string, the other end and institute
The input for stating the 3rd LED constant current controller is connected, and described sampling resistor R3 one end is permanent with the 3rd LED
The C-terminal of stream controller is connected, and the other end is connected with the output end of the 3rd LED constant current controller；
The electric capacity C1 is connected in parallel on the output end of the input voltage regulation module and the 3rd LED constant current control
Between the output end of device processed；
Alternatively, described input voltage regulation module is specifically included：
The voltage light modulator TD and rectifier bridge stack BR1 being connected with the voltage light modulator TD.
Alternatively, described input voltage regulation module also includes：Power switch S0.
Alternatively, described sampling resistor R1, R2, R3 resistance size are：R1 ＞ R2 ＞ R3.
Alternatively, the first LED constant current controller, the second LED constant current controller and the described 3rd
The reference voltage of LED constant current controller is identical, the constant-current controller when the voltage of sampling resistor exceedes reference voltage
Shut-off.
Alternatively, the lamp bead of the first LED string and the second LED string is pressure-resistant and lamp bead quantity phase
Together.
Alternatively, the second LED constant current controller output end and the 3rd LED constant current controller it is defeated
Enter and be also in series with the 3rd LED string between holding.
Alternatively, the first LED string, the second LED string and the 3rd LED string
It is identical with lamp bead quantity that lamp bead is pressure-resistant.
Alternatively, the first LED string, the second LED string and the 3rd LED string
Lamp bead quantity is three.
According to a kind of LED adjusting control circuit of the application, its by an input voltage regulation module,
For adjusting input voltage range, and export the half sine wave voltage of periodic cycle；And it is electric with the input
The first connected LED string of adjustment module and the second LED string current branch adjustment module are pressed, can be with input
Voltage change forms different connection in series-parallel current branch, in addition with the first LED string and the second LED
String current branch adjustment module is parallel with electric capacity C1, and voltage light modulation low frequency can be achieved and dodges, and the LED of the application
Lamp adjusting control circuit is adapted to wide range input, High Power Factor, simple in construction, easy to operate,
Cost is low, it is easy to accomplish.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to reality
The accompanying drawing used required for applying in example or description of the prior art is briefly described, it should be apparent that, below
Accompanying drawing in description is only some embodiments described in the present invention, for those of ordinary skill in the art
For, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is illustrated according to a kind of specific embodiment circuit structure of LED adjusting control circuit of the invention
Figure；
Fig. 2 is according to input voltage in a kind of specific embodiment of LED adjusting control circuit of the invention
Vin voltage oscillogram and LED string current waveform figure.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the invention, and
The embodiment being not all of.Based on the embodiment in the present invention, what those of ordinary skill in the art were obtained
Every other embodiment, belongs to the scope of protection of the invention.
The core of the present invention is by an input voltage regulation module, for adjusting input voltage range,
And export the half sine wave voltage of periodic cycle；And the first LED being connected with the input voltage regulation module
Lamp string and the second LED string current branch adjustment module, can change to form different connection in series-parallel with input voltage
Current branch, is parallel with the first LED string and the second LED string current branch adjustment module in addition
Electric capacity C1；Wherein when the minimum voltage on electric capacity C1 is less than the conduction voltage drop V of the first LED stringLED string 1Or the
The conduction voltage drop V of two LED stringsLED string 2And the ceiling voltage on electric capacity C1 is more than leading for the first LED string
Logical pressure drop VLED string 1Or second LED string conduction voltage drop VLED string 2, the first LED string and the second LED
Connection in series-parallel is turned on；
When the minimum voltage on electric capacity C1 is more than the conduction voltage drop V of the first LED stringLED string 1Or second LED
The conduction voltage drop V of stringLED string 2And the ceiling voltage on electric capacity C1 is less than the first LED string and the 2nd LED
The conduction voltage drop sum of lamp string, the first LED string and the second LED connection in series-parallel conducting；
When the minimum voltage on electric capacity C1 is more than the conduction voltage drop V of the first LED stringLED string 1Or second LED
The conduction voltage drop V of stringLED string 2And the ceiling voltage on electric capacity C1 is more than the first LED string and the 2nd LED
The conduction voltage drop sum of lamp string, the first LED string and the second LED connection in series-parallel conducting and series connection conducting alternating
Work；
When the minimum voltage on electric capacity C1 is more than the conduction voltage drop sum of LED string 1 and LED string 2, LED
Lamp string 1 and the series connection conducting of LED string 2, the following detailed description of.
With reference to Fig. 1, the figure is according to a kind of circuit of the specific embodiment of LED adjusting control circuit of the invention
Structural representation.
The present embodiment is to realize the specific embodiment that voltage light modulation low frequency dodges, LED light modulation control in the present embodiment
Circuit processed mainly includes：
Power switch S0, voltage light modulator TD, rectifier bridge stack BR1, electric capacity C1, three LED strings：
LED string 1 (i.e. the first LED string), LED string 2 (i.e. the second LED string), LED string 3 are (i.e.
3rd LED string), three LED constant current controllers：(i.e. the first LED constant current control of LED constant current controller 1
Device processed), LED constant current controller 2 (i.e. the second LED constant current controller), LED constant current controller 3 (i.e.
Three LED constant current controllers), sampling resistor R1, R2, R3 and commutation diode VD1, wherein power switch
S0, voltage light modulator TD constitute input voltage regulation module, to adjust input voltage range.
When implementing, the input of the voltage light modulator TD passes through power switch S0 and power supply
Connection, a voltage light modulator TD output end is connected with a rectifier bridge stack BR1 AC input end, electricity
Pressure light modulator TD another output end is connected with rectifier bridge stack BR1 another AC input end, described whole
Stream bridge heap BR1 positive output end is connected with electric capacity C1 positive pole, while rectifier bridge stack BR1 positive is defeated
Go out end with the anode of LED string 1 and one end of LED constant current controller 1 to be connected, rectifier bridge stack BR1's is negative
Phase output terminal is grounded after being connected with electric capacity C1 negative pole；The negative electrode and commutation diode of the LED string 1
VD1 anode connection, commutation diode VD1 negative electrodes are connected with the A ends of LED constant current controller 1, simultaneously
Commutation diode VD1 negative electrode is connected by resistance R1 with the other end of LED constant current controller 1, simultaneously
The other end of LED constant current controller 1 is connected with the anode of LED string 2, the negative electrode connection of LED string 2
The B ends of LED constant current controller 2, one end of LED constant current controller 2 is connected with the negative electrode of LED string 1,
The other end of LED constant current controller 2 is connected by resistance R2 with B ends, while LED constant current controller 2
The other end be connected with the anode of LED string 3, the negative electrode of LED string 3 and LED constant current controller 3
One end is connected, and the other end of LED constant current controller 3 passes through resistance R3 and the C of LED constant current controller 3
End is connected, while the other end ground connection of LED constant current controller 3.
The following detailed description of the course of work of the LED adjusting control circuit of the present embodiment, it is described as follows：
With reference to Fig. 1 and Fig. 2, in the present embodiment after power switch is closed, voltage light modulator TD is adjusted, by
In electric capacity C1 charge and discharge electro ultrafiltration, so electric capacity C1 minimum voltage will compared to the minimum voltage of input voltage
It is much higher；If the minimum voltage on electric capacity C1 is less than the conduction voltage drop V of LED string 1LED string 1Or LED
The conduction voltage drop V of string 2LED string 2And the ceiling voltage on electric capacity C1 is more than the conduction voltage drop V of LED string 1LED Lamp string 1Or the conduction voltage drop V of LED string 2LED string 2, LED string 1 and the turned in parallel of LED string 2, electric capacity
Waveform such as Fig. 2-a of voltage and parallel connection LED string on C1；Continue to adjust voltage light modulator TD raising input electricity
Minimum voltage on pressure, electric capacity C1 is more than the conduction voltage drop V of LED string 1LED string 1Or LED string 2 is led
Logical pressure drop VLED string 2And the ceiling voltage on electric capacity C1 is less than the conducting pressure of LED string 1 and LED string 2
Voltage on sum, LED string 1 and the turned in parallel of LED string 2, electric capacity C1 and parallel connection LED string drop
Waveform such as Fig. 2-a, current value is I1+I2 continuous linear, and LED string is without strobe light emission；Continue to adjust electricity
Light modulator TD is pressed to improve the conduction voltage drop that the minimum voltage on input voltage, electric capacity C1 is more than LED string 1
VLED string 1Or the conduction voltage drop V of LED string 2LED string 2And the ceiling voltage on electric capacity C1 is more than LED string
1 and the conduction voltage drop sum of LED string 2, LED string 1 and the turned in parallel of LED string 2 and series connection are turned on
Waveform such as Fig. 2-b of voltage and parallel connection LED string on alternation, electric capacity C1, electric current is in I1+I2 and I3
Alternately change, the luminous stroboscopic of LED string is smaller；Continue to adjust voltage light modulator TD raising input voltages,
Minimum voltage on electric capacity C1 is more than the conduction voltage drop sum of LED string 1 and LED string 2, LED string
1 and the series connection conducting of LED string 2, waveform such as Fig. 2-a of voltage and parallel connection LED string on electric capacity C1 are electric
Flow valuve is I3 straight line, and LED string is without strobe light emission；It is when regulation voltage light modulator TD reduces input voltage
Control process contrast, is repeated no more here.
Explanation is needed, by simply adjusting input voltage so as to realize to LED brightness in the present embodiment
Regulation, and stroboscopic phenomenon can be eliminated by electrochemical capacitor C1, equally also there is wide range input, knot
Structure is simple, and easy to operate, cost 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 this
The embodiment of invention can be put into practice in the case of these no details.In some instances, not
Known method, structure and technology are shown specifically, so as not to obscure the understanding of this description.
Similarly, it will be appreciated that in order to simplify the disclosure and help to understand one in each inventive aspect
Or it is multiple, above in the description of the exemplary embodiment of the present invention, each feature of the invention is sometimes
It is grouped together into single embodiment, figure or descriptions thereof.However, should not be by the disclosure
Method be construed to reflect following intention：That is the present invention for required protection requirement is than in each claim
The middle more features of feature be expressly recited.More precisely, as the following claims reflect
As, inventive aspect is all features less than single embodiment disclosed above.Therefore, it then follows
Thus claims of embodiment are expressly incorporated in the embodiment, wherein each right
It is required that in itself all as the separate embodiments of the present invention.
It should be noted that the present invention will be described rather than limits the invention for above-described embodiment,
And those skilled in the art can design replacement in fact without departing from the scope of the appended claims
Apply example.
Claims (10)
1. a kind of LED adjusting control circuit, it is characterised in that including：
Input voltage regulation module, for adjusting input voltage range, and exports the half sine wave voltage of periodic cycle；
The first LED string being connected with the input voltage regulation module and the second LED string current branch adjustment module；
The electric capacity C1 in parallel with the first LED string and the second LED string current branch adjustment module；
Wherein when the minimum voltage on electric capacity C1 is less than the conduction voltage drop V of the first LED stringLED Lamp string 1Or second LED string conduction voltage drop VLED Lamp string 2And the ceiling voltage on electric capacity C1 is more than the conduction voltage drop V of the first LED stringLED Lamp string 1Or second LED string conduction voltage drop VLED Lamp string 2, the first LED string and the second LED connection in series-parallel are turned on；
When the minimum voltage on electric capacity C1 is more than the conduction voltage drop V of the first LED stringLED Lamp string 1Or second LED string conduction voltage drop VLED Lamp string 2And the ceiling voltage on electric capacity C1 is less than the conduction voltage drop sum of the first LED string and the second LED string, the first LED string and the second LED connection in series-parallel conducting；
When the minimum voltage on electric capacity C1 is more than the conduction voltage drop V of the first LED stringLED Lamp string 1Or second LED string conduction voltage drop VLED Lamp string 2And the ceiling voltage on electric capacity C1 is more than the conduction voltage drop sum of the first LED string and the second LED string, the first LED string and the second LED connection in series-parallel conducting and series connection conducting alternation；
When the minimum voltage on electric capacity C1 is more than the conduction voltage drop sum of LED string 1 and LED string 2, LED string 1 and the series connection conducting of LED string 2.
2. circuit according to claim 1, it is characterised in that described the first LED string and the second LED string current branch adjustment module is specifically included：
The the first LED string and the second LED string of the corresponding conversion lamplight brightness of voltage range change exported according to the input voltage regulation module；
Drive the first LED constant current controller, the second LED constant current controller and the 3rd LED constant current controller of the first LED string and the second LED string；
Changed according to the input voltage regulation module output voltage range, the first LED string and the commutation diode VD1 of the connection in series-parallel relation of the second LED string are adjusted together with the first LED constant current controller, the second LED constant current controller and the 3rd LED constant current controller；And adjust the first LED string and sampling resistor R1, R2, R3 of the second LED string operating current size；
Wherein, input of the output end of the input voltage regulation module respectively with the first LED string anode and the first LED constant current controller is connected, the first LED string negative electrode is connected with the input of the second LED constant current controller, the output end of the first LED constant current controller is connected with the anode of the second LED string, the negative electrode of the second LED string is connected with the B ends of the second LED constant current controller, the input of the 3rd LED constant current controller is connected with the output end of the second LED constant current controller, the anode of the commutation diode VD1 is connected with the negative electrode of the first LED string, the negative electrode of the commutation diode VD1 is connected with the A ends of the first LED constant current controller, one end of the sampling resistor R1 is connected with the negative electrode of the commutation diode VD1, the other end is connected with the output end of the first LED constant current controller, one end of the sampling resistor R2 is connected with the negative electrode of the second LED string, the other end is connected with the input of the 3rd LED constant current controller, described sampling resistor R3 one end is connected with the C-terminal of the 3rd LED constant current controller, the other end is connected with the output end of the 3rd LED constant current controller；
The electric capacity C1 is connected in parallel between the output end of the output end of the input voltage regulation module and the 3rd LED constant current controller.
3. circuit according to claim 1, it is characterised in that described input voltage regulation module is specifically included：
The voltage light modulator TD and rectifier bridge stack BR1 being connected with the voltage light modulator TD.
4. circuit according to claim 3, it is characterised in that described input voltage regulation module also includes：Power switch S0.
5. circuit according to claim 2, it is characterised in that described sampling resistor R1, R2, R3 resistance size is：R1 ＞ R2 ＞ R3.
6. circuit according to claim 2, it is characterized in that, the first LED constant current controller, the second LED constant current controller are identical with the reference voltage of the 3rd LED constant current controller, and when the voltage of sampling resistor exceedes reference voltage, constant-current controller is turned off.
7. circuit according to claim 2, it is characterised in that the first LED string is pressure-resistant identical with lamp bead quantity with the lamp bead of the second LED string.
8. circuit according to claim 7, it is characterised in that be also in series with the 3rd LED string between the output end of the second LED constant current controller and the input of the 3rd LED constant current controller.
9. circuit according to claim 8, it is characterised in that the lamp bead of the first LED string, the second LED string and the 3rd LED string is pressure-resistant identical with lamp bead quantity.
10. circuit according to claim 9, it is characterised in that the lamp bead quantity of the first LED string, the second LED string and the 3rd LED string is three.
Priority Applications (1)
| 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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| 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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| CN107046746A true CN107046746A (en) | 2017-08-15 |
| CN107046746B CN107046746B (en) | 2019-03-12 |
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| CN201610083182.2A Active CN107046746B (en) | 2016-02-06 | 2016-02-06 | A kind of LED light adjusting control circuit |
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| 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 |
| CN107896406A (en) * | 2017-12-29 | 2018-04-10 | 东莞艾笛森光电有限公司 | A synchronous dimming drive circuit |
| CN109831844A (en) * | 2018-12-18 | 2019-05-31 | 陕西亚成微电子股份有限公司 | A kind of no stroboscopic High Power Factor LED driving method and circuit |
| CN112566320A (en) * | 2020-12-22 | 2021-03-26 | 安徽亮亮电子科技有限公司 | Method for realizing high power factor and low stroboflash |
| CN113597051A (en) * | 2019-06-06 | 2021-11-02 | 上海路傲电子科技有限公司 | Chip driving circuit, chip, linear constant current driving circuit and control method |
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| 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 |
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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 |
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| 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 |
| CN113597051A (en) * | 2019-06-06 | 2021-11-02 | 上海路傲电子科技有限公司 | Chip driving circuit, chip, linear constant current driving circuit and control method |
| CN113597051B (en) * | 2019-06-06 | 2024-02-09 | 上海路傲电子科技有限公司 | Chip driving circuit, chip, linear constant current driving circuit and control method |
| CN112566320A (en) * | 2020-12-22 | 2021-03-26 | 安徽亮亮电子科技有限公司 | Method for realizing high power factor and low stroboflash |
| 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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| Publication number | Publication date |
|---|---|
| CN107046746B (en) | 2019-03-12 |
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