CN207022248U - A kind of LED low ripples constant-current light modulation driver - Google Patents
A kind of LED low ripples constant-current light modulation driver Download PDFInfo
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- CN207022248U CN207022248U CN201720706224.3U CN201720706224U CN207022248U CN 207022248 U CN207022248 U CN 207022248U CN 201720706224 U CN201720706224 U CN 201720706224U CN 207022248 U CN207022248 U CN 207022248U
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Abstract
The utility model discloses a kind of LED low ripples constant-current light modulation driver.It includes single chip machine controlling circuit, EMI circuits, rectification circuit, pfc circuit, LLC circuits, output rectification circuit, light adjusting circuit and loop control circuit, commutation diode is provided with described pfc circuit, high frequency transformer is provided with described LLC circuits, described EMI circuits, rectification circuit, pfc circuit, LLC circuits, output rectification circuit is sequentially connected, described output rectification circuit is connected with light adjusting circuit and single chip machine controlling circuit respectively, described light adjusting circuit, single chip machine controlling circuit, loop control circuit is sequentially connected, described single chip machine controlling circuit is connected with LLC circuits.The beneficial effects of the utility model are：Circuit is linear light modulation, and output ripple electric current is very small, it is possible to achieve light modulation and full load LED are safe from harm without stroboscopic to human body.
Description
Technical field
LED correlative technology fields are the utility model is related to, refer in particular to a kind of LED low ripples constant-current light modulation driver.
Background technology
With the sustainable development of science and technology, incandescent lamp of the commercialized illuminating product from the first generation at present；The second generation
Fluorescent lamp, halogen lamp；The light emitting diode (LED) of the forth generation of the high-intensity gas discharge lamp of the third generation and instantly main flow.According to
The light efficiency more and more higher of bright lamp tool, develops towards the direction of energy-conserving and environment-protective always.But undeniably, the development of electric light source also band
The problem of many new is carried out, in addition on influences such as environment, the energy, artificial light environment caused by human health on influenceing
Equally it can not be ignored.Present people not only only focus on the physical property effect of illumination, while also take much count of the photo-biological peace of illumination
Entirely.And most of commercialized electric source lighting product is driven by exchanging at present, the stroboscopic effect of light fixture is to human body
Influenceed caused by healthy has turned into various illuminating products needs key problems-solving.
Utility model content
The utility model is above-mentioned in order to overcome the shortcomings of to exist in the prior art, there is provided a kind of dimming driver is without frequency
The LED low ripple constant-current light modulation drivers of sudden strain of a muscle.
To achieve these goals, the utility model uses following technical scheme：
A kind of LED low ripples constant-current light modulation driver, including single chip machine controlling circuit and
For filtering out the EMI circuits for the various interference signals come in by power network；
For alternating voltage to be converted to the rectification circuit of DC voltage；
For providing the pfc circuit of a stable 400V DC voltage；
For providing the LLC circuits of variable an output AC voltage and electric current；
For output high voltage being converted into the output rectification circuit of DC voltage；
For changing the light adjusting circuit of dim signal change；
For the loop control circuit for the voltage and current size for controlling output；
Commutation diode is provided with described pfc circuit, high frequency transformer, described EMI are provided with described LLC circuits
Circuit, rectification circuit, pfc circuit, LLC circuits, output rectification circuit are sequentially connected, described output rectification circuit respectively with tune
Optical circuit connects with single chip machine controlling circuit, and described light adjusting circuit, single chip machine controlling circuit, loop control circuit connect successively
Connect, described single chip machine controlling circuit is connected with LLC circuits.
127V or 220V AC voltage are obtained from civil power, by EMI circuits, because the effect of EMI circuits is filtered out by electricity
The various interference signals that net is come in, power network is altered so as to prevent the high frequency of power switch circuit formation from disturbing；Then rectification circuit is passed through,
Become DC voltage supply pfc circuit, pfc circuit can produce a 100KHz high-frequency PWM signal, by whole in pfc circuit
Diode is flowed, a stable 400V DC voltage is provided for LLC circuits；LLC circuits and high frequency transformer offer one are variable
Output AC voltage and electric current and controlled by single chip machine controlling circuit；Output rectification circuit is converted into output high voltage
DC voltage；Dim signal changes in single chip machine controlling circuit detection light adjusting circuit, and the reference voltage of loop control circuit is entered
Row changes, and to control the size of the voltage and current of output, because circuit lines dim, output ripple electric current is very small, can
To realize light modulation and full load LED without stroboscopic.
The beneficial effects of the utility model are：Circuit is linear light modulation, and output ripple electric current is very small, it is possible to achieve is adjusted
Light and full load LED are safe from harm without stroboscopic to human body.
Brief description of the drawings
Fig. 1 is structured flowchart of the present utility model.
In figure：1.EMI circuits, 2. rectification circuits, 3.PFC circuits, 4.LLC circuits, 5. output rectification circuits, 6. light modulation electricity
Road, 7. single chip machine controlling circuits, 8. loop control circuits.
Embodiment
The utility model is further described with reference to the accompanying drawings and detailed description.
In embodiment as described in Figure 1, a kind of LED low ripples constant-current light modulation driver, including single chip machine controlling circuit 7 with
And
For filtering out the EMI circuits 1 for the various interference signals come in by power network；
For alternating voltage to be converted to the rectification circuit 2 of DC voltage；
For providing the pfc circuit 3 of a stable 400V DC voltage；
For providing the LLC circuits 4 of variable an output AC voltage and electric current；
For output high voltage being converted into the output rectification circuit 5 of DC voltage；
For changing the light adjusting circuit 6 of dim signal change；
For the loop control circuit 8 for the voltage and current size for controlling output；
Is provided with commutation diode in pfc circuit 3, LLC circuits 4 are interior to be provided with high frequency transformer, EMI circuits 1, rectification circuit 2,
Pfc circuit 3, LLC circuits 4, output rectification circuit 5 are sequentially connected, output rectification circuit 5 respectively with light adjusting circuit 6 and single-chip microcomputer
Control circuit 7 is connected, and light adjusting circuit 6, single chip machine controlling circuit 7, loop control circuit 8 are sequentially connected, single chip machine controlling circuit 7
It is connected with LLC circuits 4.
Obtain 127V or 220V AC voltage from civil power, by EMI circuits 1, due to the effect of EMI circuits 1 be filter out by
The various interference signals that power network is come in, power network is altered so as to prevent the high frequency of power switch circuit formation from disturbing；Then rectified current is passed through
Road 2, become DC voltage supply pfc circuit 3, pfc circuit 3 can produce a 100KHz high-frequency PWM signal, by pfc circuit 3
Interior commutation diode, a stable 400V DC voltage is provided for LLC circuits 4；LLC circuits 4 and high frequency transformer provide
One variable output AC voltage and electric current is simultaneously controlled by single chip machine controlling circuit 7；Output rectification circuit 5 is output high frequency
Voltage conversion is into DC voltage；Single chip machine controlling circuit 7, which detects dim signal in light adjusting circuit 6, to be changed, to loop control circuit 8
Reference voltage be changed, to control the size of the voltage and current of output because circuit lines dim, output ripple electricity
Stream is very small, it is possible to achieve light modulation and full load LED are without stroboscopic.
Claims (1)
1. a kind of LED low ripples constant-current light modulation driver, it is characterized in that, including single chip machine controlling circuit (7) and
For filtering out the EMI circuits (1) for the various interference signals come in by power network；
For alternating voltage to be converted to the rectification circuit (2) of DC voltage；
For providing the pfc circuit (3) of a stable 400V DC voltage；
For providing the LLC circuits (4) of variable an output AC voltage and electric current；
For output high voltage being converted into the output rectification circuit (5) of DC voltage；
For changing the light adjusting circuit (6) of dim signal change；
For the loop control circuit (8) for the voltage and current size for controlling output；
Commutation diode is provided with described pfc circuit (3), high frequency transformer is provided with described LLC circuits (4), it is described
EMI circuits (1), rectification circuit (2), pfc circuit (3), LLC circuits (4), output rectification circuit (5) are sequentially connected, and described is defeated
Go out rectification circuit (5) to be connected with light adjusting circuit (6) and single chip machine controlling circuit (7) respectively, described light adjusting circuit (6), monolithic
Machine control circuit (7), loop control circuit (8) are sequentially connected, and described single chip machine controlling circuit (7) connects with LLC circuits (4)
Connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720706224.3U CN207022248U (en) | 2017-06-18 | 2017-06-18 | A kind of LED low ripples constant-current light modulation driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720706224.3U CN207022248U (en) | 2017-06-18 | 2017-06-18 | A kind of LED low ripples constant-current light modulation driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207022248U true CN207022248U (en) | 2018-02-16 |
Family
ID=61484978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720706224.3U Active CN207022248U (en) | 2017-06-18 | 2017-06-18 | A kind of LED low ripples constant-current light modulation driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207022248U (en) |
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2017
- 2017-06-18 CN CN201720706224.3U patent/CN207022248U/en active Active
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