CN208445798U - Thyristor constant current LED dimming driver - Google Patents
Thyristor constant current LED dimming driver Download PDFInfo
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- CN208445798U CN208445798U CN201821059932.3U CN201821059932U CN208445798U CN 208445798 U CN208445798 U CN 208445798U CN 201821059932 U CN201821059932 U CN 201821059932U CN 208445798 U CN208445798 U CN 208445798U
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Abstract
The utility model discloses a kind of thyristor constant current LED dimming driver, the thyristor constant current LED dimming driver includes: power supply conversion, AC-DC conversion circuit, high-power driving pipe, constant-current drive circuit, decompression modulation circuit, voltage conversion circuit, host scm processing circuit and constant current output circuit.Technical solution provided by the present application has the brightness adjustment control driving for realizing compatible three of the above signal, and avoids dimming the advantages of flashing.
Description
Technical field
The utility model relates to electronic field more particularly to a kind of thyristor constant current LED dimming drivers.
Background technique
The working method of traditional thyristor regulating photocontrol driver is using detectable controllable silicon controller on the market
The power supply chip scheme of variable phase angle output, receives silicon-controlled signal, follows the size of signal control output electric current.Due to
Silicon-controlled characteristic describes positive reverse breakdown voltage there are error, and breakdown voltage asymmetry can cause silicon-controlled positive half cycle and bear
The angle of flow of half cycle is different, is especially apparent in the light modulator of low cost, and output electric current can also follow input to change, and causes
LED light neglect it is bright neglect it is dark, it is especially obvious in low output.And cut before being directed to, after cut the light modulators of signal or different brands, adjust
The problem of light performance is different, and compatibility is poor, is easy to appear light modulation flashing.
Summary of the invention
The purpose of this utility model is to provide a kind of thyristor constant current LED dimming drivers, mainly solve existing skill
The problem of art light modulation flashing.
In order to solve the above-mentioned technical problem, the utility model provides a kind of thyristor constant current LED dimming driver, described
Thyristor constant current LED dimming driver include: power supply conversion, AC-DC conversion circuit, high-power driving pipe, constant-current drive circuit,
It is depressured modulation circuit, voltage conversion circuit, host scm processing circuit and constant current output circuit；
Wherein, the input terminal of power supply conversion is connect with external power supply, and two output ends of power supply conversion are separately connected AC-DC
One end of conversion circuit and one end of decompression modulation circuit；
One end of the other end connection high-power driving pipe of AC-DC conversion circuit, the power take-off of big function-driven pipe
Connect an input terminal of constant-current drive circuit；
It is depressured one end of the other end connection voltage conversion circuit of modulation circuit, the other end of voltage conversion circuit connects master
One end of processor of single chip computer, another input of the pulse width signal output end connection constant-current drive circuit of host scm processor
End,
Constant-current drive circuit output end connects one end of constant current output circuit, and the other end output DC of constant current output circuit is permanent
Stream.
The utility model patent that technical solution provided by the utility model provides design it is a kind of can to cutting before silicon-controlled, after
It cuts signal or general pressure regulation signal is analyzed and processed the LED light adjusting controller of work, when work can be directed to different tune automatically
Section signal has the ability for distinguishing work, and makes correct response, to realize the brightness adjustment control of compatible three of the above signal
Driving, and avoid dimming the advantages of flashing.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the utility model embodiment, will make below to required in embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is some embodiments of the utility model, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the structural schematic diagram of thyristor constant current LED dimming driver provided by the present application.
Fig. 2 is thyristor constant current LED dimming driver circuit diagram provided by the present application.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are under that premise of not paying creative labor
Every other embodiment obtained, fall within the protection scope of the utility model.
In the description of the utility model embodiment, it is to be understood that term " thickness " " left side " " right side " "upper" "lower" etc. refers to
The orientation or positional relationship shown be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the utility model and
Simplify description, rather than implies or indicate that signified device or element must have a particular orientation, with specific orientation construction
And operation, therefore should not be understood as limiting the present invention.
The utility model provides a kind of brand new digital thyristor constant current LED dimming driver, it is by the drive
A single-chip microcontroller is added, realizes that the AC of driver turns DC circuit and is merely responsible for realizing power supply conversion work, needs not participate in dim signal
Processing, dim signal is handled by the single-chip microcontroller, thus avoid turning due to AC DC circuit task is overweight and the various problems that occur.
Silicon-controlled signal is converted to d. c. voltage signal by decompression modulation circuit, single-chip microcontroller is transferred to and carries out analog-to-digital conversion, thus
Cut before avoiding, after circuit compatibility problem caused by the difference cut it is flat can to optimize light modulation and by adjusting SCM program
Slippery can also customize different dimming curves, adapt to the demand of various lamps and lanterns and occasion.
Pass through dedicated AC when work first and turn DC chip, realize and cut before access is silicon-controlled, after cut signal or general pressure regulation
Signal, when voltage range is in AC38-240V, which is driven electricity to constant current by exportable steady dc voltage
Signal is connected to decompression modulation circuit simultaneously for that powers by road, becomes the voltage signal of direct current 0-5V after modulated, the voltage with
Change with the AC voltage change of input, is then output to brightness adjustment control single-chip microcontroller, corresponding pulsewidth modulation is generated by single-chip microcontroller
Signal, control constant-current drive circuit generate brightness control signal, so that the LED light managed is generated corresponding brightness, to reach
The effect of light modulation.This product belongs to the adjustable CD-ROM driver of LED constant current
The utility model has the advantages that can realize AC38-240V Width funtion input, can receive it is silicon-controlled before cut, after cut letter
Number or general pressure regulation signal control, thoroughly solve the compatibility issue of controllable silicon light modulation simultaneously because be added single-chip microcontroller,
Digitlization has been carried out to controllable silicon light modulation to improve, and is engaged in and is realized smoother light modulation and customized dimming curve.
It please referring to shown in attached drawing 1, thyristor regulating optical signal accesses this driver, after power-switching circuit optimizes, point
It Shu Ru not AC-DC conversion circuit and decompression modulation circuit.AC-DC conversion circuit is responsible for for the high AC voltage of input being converted into
DC voltage, the high AC voltage can be the 220V of fixed voltage, be also possible to through overregulate it is silicon-controlled before cut, after cut
Voltage, can also be general adjusting voltage (the 220V alternating current of i.e. non-cut phase), which can ensure that exportable sufficient power is steady
Fixed DC voltage.The voltage will input the constant-current drive circuit of rear class.It is depressured modulation circuit and passes through resistance-capacitance depressurization for input
Alternating current drops to suitable voltage and is converted into direct current, by light-coupled isolation input voltage switching circuit, is converted to 0-5V and stablizes
Voltage signal and input monolithic under-chassis position, single-chip microcontroller generates pulse-width signal all the way by parsing Internal Control Procedure, leads to
The amplification for crossing external circuit progress signal exports the size of current that constant current output is controlled to constant-current drive circuit, to make LED light
Tool is lighted with corresponding bright.
Referring to Fig.2, Fig. 2 is thyristor constant current LED dimming driver physical circuit schematic diagram provided by the present application.
It is the embodiment of the utility model embodiment above, it is noted that for the ordinary skill people of the art
For member, under the premise of not departing from the utility model embodiment principle, several improvements and modifications can also be made, these improvement
Also it is considered as the protection scope of the utility model with retouching.
Claims (1)
1. a kind of thyristor constant current LED dimming driver, which is characterized in that the thyristor constant current LED dimming driver includes:
Power supply conversion, AC-DC conversion circuit, high-power driving pipe, constant-current drive circuit, decompression modulation circuit, voltage conversion circuit, master
Single-chip microcontroller processing circuit and constant current output circuit；
Wherein, the input terminal of power supply conversion is connect with external power supply, and two output ends of power supply conversion are separately connected AC-DC conversion
One end of circuit and one end of decompression modulation circuit；
One end of the other end connection high-power driving pipe of AC-DC conversion circuit, the power take-off connection of big function-driven pipe
One input terminal of constant-current drive circuit；
It is depressured one end of the other end connection voltage conversion circuit of modulation circuit, the other end of voltage conversion circuit connects main monolithic
One end of machine processor, another input terminal of the pulse width signal output end connection constant-current drive circuit of host scm processor,
Constant-current drive circuit output end connects one end of constant current output circuit, and the other end of constant current output circuit exports DC constant current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821059932.3U CN208445798U (en) | 2018-07-05 | 2018-07-05 | Thyristor constant current LED dimming driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821059932.3U CN208445798U (en) | 2018-07-05 | 2018-07-05 | Thyristor constant current LED dimming driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208445798U true CN208445798U (en) | 2019-01-29 |
Family
ID=65088090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821059932.3U Active CN208445798U (en) | 2018-07-05 | 2018-07-05 | Thyristor constant current LED dimming driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208445798U (en) |
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2018
- 2018-07-05 CN CN201821059932.3U patent/CN208445798U/en active Active
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