CN106793261A - Ripple eliminates circuit, power supply and LED - Google Patents
Ripple eliminates circuit, power supply and LED Download PDFInfo
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- CN106793261A CN106793261A CN201611086080.2A CN201611086080A CN106793261A CN 106793261 A CN106793261 A CN 106793261A CN 201611086080 A CN201611086080 A CN 201611086080A CN 106793261 A CN106793261 A CN 106793261A
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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]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
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Abstract
Circuit, power supply and LED are eliminated the invention provides a kind of ripple, the ripple eliminates the AC compounent that circuit is used to eliminate in the driving current of driving power supply output, and the ripple eliminates circuit to be included：Filter rectification module and constant-current voltage-stabilizing module；The input of the filter rectification module is connected with driving power supply, and output end is connected with the input of constant-current voltage-stabilizing module；The output end of the constant-current voltage-stabilizing module is connected with load；The constant-current voltage-stabilizing module includes FET and the second voltage-regulator diode being arranged between fet gate and source electrode, and the magnitude of voltage of second voltage-regulator diode causes that the FET is maintained at constant current area and works.The present invention can effectively eliminate the current ripple in electric power outputting current.
Description
Technical field
The present invention relates to electronic circuit technology field, and in particular to a kind of ripple eliminates circuit, power supply and LED.
Background technology
LED (Lighting Emitting Diode, light emitting diode), with the spy such as energy-saving and environmental protection, efficient, safety
Point, therefore, it is widely used in the illumination occasion such as landscape, street lamp and electronic product backlight.
Traditional LED drive circuit includes LED driver and output capacitance, and LED driver is by electric main (working frequency
It is 50Hz) be converted to direct current and be supplied to LED load, because the driving current that LED driver is exported to LED load includes
The AC compounent of 100Hz or so, so as to cause that the scintillation that human eye can be perceived occurs when LED is luminous.If making for a long time
Human eye is caused compared with major injury with meeting.
The content of the invention
For defect of the prior art, the present invention provides a kind of ripple and eliminates circuit, power supply and LED, can be effective
Eliminate the current ripple in electric power outputting current.
In order to solve the above technical problems, the present invention provides following technical scheme：
In a first aspect, eliminating circuit the invention provides a kind of ripple, the ripple eliminates circuit to be used to eliminate driving electricity
AC compounent in the driving current of source output, the ripple eliminates circuit to be included：Filter rectification module and constant-current voltage-stabilizing module；
Wherein, the input of the filter rectification module is connected with driving power supply, and output end is defeated with constant-current voltage-stabilizing module
Enter end connection；The output end of the constant-current voltage-stabilizing module is connected with load；
Wherein, the constant-current voltage-stabilizing module includes FET and be arranged between fet gate and source electrode the
Two voltage-regulator diodes, the magnitude of voltage of second voltage-regulator diode causes that the FET is maintained at constant current area and works.
Further, the filter rectification module includes the second electric capacity and second resistance；
Wherein, the first end of second electric capacity is connected with the negative pole of driving power supply, and the second end is steady with the constant current respectively
The first end connection of the input and second resistance of die block, the second end of the second resistance connects with the drain electrode of FET
Connect, wherein, the source electrode of FET is connected with the positive pole of driving power supply.
Further, the capacitance of second electric capacity is C, and the resistance of the second resistance is R, filter rectification module when
Between constant, τ=R*C, wherein, τ ＞ 10ms.
Further, the timeconstantτ=60~110ms of the filter rectification module.
Further, the timeconstantτ=100ms of the filter rectification module.
Further, the load includes light emitting diode.
Further, the constant-current voltage-stabilizing module also includes：
The voltage stabilization unit between fet gate and drain electrode is arranged on, the grid for providing stabilization for FET
Pole cut-in voltage, the voltage stabilization unit includes：3rd resistor, the second diode and the first voltage-regulator diode, wherein, first
The positive pole of voltage-regulator diode is connected by 3rd resistor with the grid of FET, the negative pole of the first voltage-regulator diode and the two or two
The negative pole connection of pole pipe, the positive pole of the second diode is connected with the drain electrode of FET.
Further, the ripple eliminates circuit and also includes：First electric capacity, the first end of first electric capacity and described
The first end connection of two electric capacity, the second end is connected with the second end of the second resistance.
Further, the ripple eliminates circuit and also includes：With the first electricity that first electric capacity is in parallel connectivity
Resistance.
Further, the ripple eliminates circuit and also includes：Inductance and the first diode；
Wherein, the positive pole of first diode is connected with the second end of the inductance, negative pole and the FET
Drain electrode connection, the first end of the inductance is connected with the negative pole of driving power supply.
Second aspect, circuit is eliminated present invention also offers a kind of power supply, including ripple as described above.
The third aspect, circuit is eliminated present invention also offers a kind of LED, including ripple as described above.
As shown from the above technical solution, the ripple that the present invention is provided eliminates circuit, the drive for eliminating driving power supply output
AC compounent in streaming current, the ripple eliminates circuit to be included：Filter rectification module and constant-current voltage-stabilizing module；The filtering is whole
One end of flow module is connected with driving power supply, and the other end is connected with the input of constant-current voltage-stabilizing module；The constant-current voltage-stabilizing module
Output end with load be connected；Wherein, the constant-current voltage-stabilizing module include FET and be arranged on fet gate with
The second voltage-regulator diode between source electrode.It can be seen that, the ripple that the present invention is provided eliminates circuit, by scene effect tube grid and source
Second voltage-regulator diode is set between pole so that can be controlled by second voltage-regulator diode of the selection with suitable voltage stabilizing value
FET is operated in constant current area, and then eliminates the current ripple in electric power outputting current so that load current is changed into not including
The DC current of AC compounent.Additionally, the ripple that the present invention is provided eliminates circuit, circuit is eliminated relative to existing ripple
Say, simple structure, it is convenient to realize, by setting the suitable pole of voltage stabilizing two of voltage stabilizing value between scene effect tube grid and source electrode
Pipe is achieved that the stabling current output of FET, it is not necessary to complicated circuit structure.
Brief description of the drawings
In order to illustrate more clearly of the present embodiment or technical scheme of the prior art, below will be to embodiment or existing skill
The accompanying drawing to be used needed for art description is briefly described, it should be apparent that, drawings in the following description are of the invention one
A little embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these
Accompanying drawing obtains other accompanying drawings.
Fig. 1 is the structural representation that the ripple that one embodiment of the invention is provided eliminates circuit.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, clear, complete description is carried out to the technical scheme in the embodiment of the present invention, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
One embodiment of the invention provides a kind of ripple and eliminates circuit, and the ripple eliminates circuit to be used to eliminate driving power supply
AC compounent in the driving current of output, referring to Fig. 1, the ripple eliminates circuit to be included：Filter rectification module 100 and constant current
Voltage stabilizing module 200；
Wherein, the input of the filter rectification module 100 is connected with driving power supply 300, output end and constant-current voltage-stabilizing mould
The input connection of block 200；The output end of the constant-current voltage-stabilizing module 200 is connected with load；
Wherein, the constant-current voltage-stabilizing module 200 includes FET Q1 and is arranged on FET Q1 grids and source electrode
Between the second voltage-regulator diode DZ2, the magnitude of voltage of second voltage-regulator diode causes that the FET is maintained at constant current
Area works, i.e., the voltage stabilizing value of described second voltage-regulator diode DZ2 is so that the FET Q1 is operated in the voltage in constant current area
Value.
It is understood that the FET Q1 described in the present embodiment is the FET with constant-current characteristics.
It is understood that the load described in the present embodiment can be LED (Lighting Emitting
Diode), or other load devices.
Seen from the above description, the ripple that the present embodiment is provided eliminates circuit, the driving for eliminating driving power supply output
AC compounent in electric current, the ripple eliminates circuit to be included：Filter rectification module and constant-current voltage-stabilizing module；The filter rectification
One end of module is connected with driving power supply, and the other end is connected with the input of constant-current voltage-stabilizing module；The constant-current voltage-stabilizing module
Output end is connected with load；Wherein, the constant-current voltage-stabilizing module includes FET and is arranged on fet gate and source
The second voltage-regulator diode between pole.It can be seen that, the ripple that the present embodiment is provided eliminates circuit, by scene effect tube grid and source
Second voltage-regulator diode is set between pole so that can be controlled by second voltage-regulator diode of the selection with suitable voltage stabilizing value
FET is operated in constant current area, and then eliminates the current ripple in electric power outputting current so that load current is changed into not including
The DC current of AC compounent.Additionally, the ripple that the present embodiment is provided eliminates circuit, circuit is eliminated relative to existing ripple
Say, simple structure, it is convenient to realize, by setting the suitable pole of voltage stabilizing two of voltage stabilizing value between scene effect tube grid and source electrode
Pipe is achieved that the stabling current output of FET, it is not necessary to complicated circuit structure.
In a kind of optional embodiment, referring to Fig. 1, the filter rectification module 100 includes the second electric capacity C2 and second
Resistance R2；
Wherein, the first end of the second electric capacity C2 is connected with the negative pole of driving power supply, the second end respectively with the constant current
The first end connection of the input and second resistance R2 of Voltage stabilizing module 200, second end of the second resistance R2 and field-effect
The drain electrode connection of pipe Q1, wherein, the source electrode of FET Q1 is connected with the positive pole of driving power supply.
In a kind of optional embodiment, the capacitance of the second electric capacity C2 is C, and the resistance of the second resistance R2 is R,
Timeconstantτ=the R*C of filter rectification module 100, in order that obtaining filter rectification module 100 can filter out driving power supply output
The alternating component of the 100Hz included in electric current or so, it is preferable that timeconstantτ can be arranged on not less than in the range of 10ms.
Preferably, the span of timeconstantτ is 60~110ms.It is further preferred that the value of timeconstantτ is 100ms,
The low-limit frequency that now filter circuit can filter AC ripple is 10Hz, so that the voltage at load two ends is straight electricity
Pressure.
In a kind of optional embodiment, the constant-current voltage-stabilizing module 200 also includes：
The voltage stabilization unit between FET Q1 grids and drain electrode is arranged on, the voltage stabilization unit includes：The
Three resistance R3, the second diode D2 and the first voltage-regulator diode DZ1, wherein, the positive pole of the first voltage-regulator diode DZ1 passes through the 3rd
Resistance R3 is connected with the grid of FET Q1, and the negative pole of the first voltage-regulator diode DZ1 is connected with the negative pole of the second diode D2,
The positive pole of the second diode D2 is connected with the drain electrode of FET Q1；The voltage stabilization unit, for being carried for FET Q1
For the gate turn-on voltage of stabilization.
In a kind of optional embodiment, referring to Fig. 1, the ripple eliminates circuit also to be included：First electric capacity C1, described
The first end of one electric capacity C1 is connected with the first end of the second electric capacity C2, and the second end connects with second end of the second resistance R2
Connect.
In a kind of optional embodiment, referring to Fig. 1, the ripple eliminates circuit also to be included：With the first electric capacity C1
In the first resistor R1 of parallel connectivity.
In a kind of optional embodiment, referring to Fig. 1, the ripple eliminates circuit also to be included：Inductance and the first diode
D1；
Wherein, the positive pole of the first diode D1 is connected with the second end of the inductance, negative pole and the FET
The drain electrode connection of Q1, the first end of the inductance is connected with the negative pole of driving power supply.
To sum up, one more preferred embodiment in, there is provided it is as shown in Figure 1 for LED power output current
Ripple circuit is removed, including：FET Q1, voltage-regulator diode DZ1, voltage-regulator diode DZ2, electrochemical capacitor C1 and electrochemical capacitor
C2, the positive pole of inductance series diode D1, after resistance R1 is in parallel with electrochemical capacitor C1, the cathode connecting diode of electrochemical capacitor C1
The negative pole of D1, the negative pole connection inductance of electrochemical capacitor C1, the two ends of resistance R2 connect positive pole and the electrolysis of electrochemical capacitor C1 respectively
The positive pole of electric capacity C2, the negative pole of the negative pole connection electrochemical capacitor C1 of electrochemical capacitor C2, negative pole connection voltage stabilizing two pole of diode D2
The negative pole of pipe DZ1, the negative pole of the cathode connecting diode D1 of diode D2, voltage-regulator diode DZ1 positive pole connection resistance R2 with
The copolar end of electrochemical capacitor C2, the two ends of resistance R3 connect the positive pole of voltage-regulator diode DZ1 and the grid of FET Q1 respectively,
The positive pole of the drain electrode connection diode D1 of FET Q1, the source electrode of voltage-regulator diode DZ2 positive poles connection FET Q1, voltage stabilizing
The grid of diode DZ2 negative poles connection FET Q1.
It will be seen from figure 1 that the filter circuit of R2 and C2 compositions is parallel to the two ends of output capacitance C1, to filter LED drives
The pulsating volage of the AC compounent contained by the output voltage of dynamic device, the voltage for making LED load two ends is a straight voltage.Additionally,
D2 and DZ1 provides metal-oxide-semiconductor Q1 stabilization gate turn-on voltages, and DZ2 voltage-stabiliser tubes selection magnitude of voltage properly can just be provided and make metal-oxide-semiconductor Q1
It is in the burning voltage of constant current area work.Because the cut-in voltage VTH of metal-oxide-semiconductor is constant, when it is in constant current area, if its
The voltage VGS of gate-source is constant, then the electric current IDS for flowing through drain-source pole is invariable.Because metal-oxide-semiconductor has above-mentioned characteristic, because
This, only need to control metal-oxide-semiconductor to be operated in constant current area, and make VGS invariable, then metal-oxide-semiconductor has constant-current characteristics so that LED load
Electric current is free from the direct current of AC compounent.
It is understood that due to high power factor circuit, to be often accompanied by more obvious optical flare or light jiggle existing
As, therefore application of the ripple elimination circuit for providing of the invention in high power factor circuit is relatively broad.
Based on identical inventive concept, another embodiment of the present invention provides a kind of power supply, and the power supply is included as above
Ripple described in embodiment eliminates circuit.
Because the power supply that the present embodiment is provided includes that ripple recited above eliminates circuit, therefore the electricity that the present embodiment is provided
Source has the function of AC compounent in automatic elimination electric power outputting current, therefore can be used for some to the requirement of power supply direct current output
Compare occasion high, be such as used for the power supply powered for LED.When the power supply is used to be powered for LED, can effectively solve
The problem of LED flickers.
It is understood that the power supply described in the present embodiment can be portable power source, or fixed power source.
Based on identical inventive concept, further embodiment of this invention provides a kind of LED, and the LED is included as above
Ripple described in the embodiment of face eliminates circuit.
Due to the present embodiment provide LED include ripple recited above eliminate circuit, therefore the present embodiment provide
LED no longer occurs scintillation or scintillation can obtain larger change, and then can effectively protect the eye of user
Eyeball escapes injury.
It is understood that the LED described in the present embodiment, can be electronic product backlight, Landscape Lamp or street lamp.
Above example is merely to illustrate technical scheme, rather than its limitations；Although with reference to the foregoing embodiments
The present invention has been described in detail, it will be understood by those within the art that：It still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent to which part technical characteristic；And these are changed or replace
Change, do not make the spirit and scope of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution.
Claims (12)
1. a kind of ripple eliminates circuit, it is characterised in that the ripple eliminates circuit is used to eliminate the driving of driving power supply output
AC compounent in electric current, the ripple eliminates circuit to be included：Filter rectification module and constant-current voltage-stabilizing module；
Wherein, the input of the filter rectification module is connected with driving power supply, the input of output end and constant-current voltage-stabilizing module
Connection；The output end of the constant-current voltage-stabilizing module is connected with load；
Wherein, the constant-current voltage-stabilizing module include FET and be arranged between fet gate and source electrode it is second steady
Pressure diode, the magnitude of voltage of second voltage-regulator diode causes that the FET is maintained at constant current area and works.
2. ripple according to claim 1 eliminates circuit, it is characterised in that the filter rectification module includes the second electric capacity
And second resistance；
Wherein, the first end of second electric capacity is connected with the negative pole of driving power supply, the second end respectively with the constant-current voltage-stabilizing mould
The first end connection of the input and second resistance of block, the second end of the second resistance is connected with the drain electrode of FET,
Wherein, the source electrode of FET is connected with the positive pole of driving power supply.
3. ripple according to claim 2 eliminates circuit, it is characterised in that the capacitance of second electric capacity is C, and described the
The resistance of two resistance be R, the timeconstantτ=R*C of filter rectification module, wherein, τ ＞ 10ms.
4. ripple according to claim 3 eliminates circuit, it is characterised in that the timeconstantτ of the filter rectification module
=60~110ms.
5. ripple according to claim 4 eliminates circuit, it is characterised in that the timeconstantτ of the filter rectification module
=100ms.
6. ripple according to claim 1 eliminates circuit, it is characterised in that the load includes light emitting diode.
7. the ripple according to any one of claim 1~6 eliminates circuit, it is characterised in that the constant-current voltage-stabilizing module is also
Including：
The voltage stabilization unit between fet gate and drain electrode is arranged on, the grid for providing stabilization for FET is opened
Voltage is opened, the voltage stabilization unit includes：3rd resistor, the second diode and the first voltage-regulator diode, wherein, the first voltage stabilizing
The positive pole of diode is connected by 3rd resistor with the grid of FET, the negative pole of the first voltage-regulator diode and the second diode
Negative pole connection, the positive pole of the second diode is connected with the drain electrode of FET.
8. ripple according to claim 2 eliminates circuit, it is characterised in that also include：First electric capacity, first electric capacity
First end be connected with the first end of second electric capacity, the second end is connected with the second end of the second resistance.
9. ripple according to claim 8 eliminates circuit, it is characterised in that also include：With first electric capacity in parallel
The first resistor of annexation.
10. the ripple according to claim 1~6,8,9 any one eliminates circuit, it is characterised in that also include：Inductance and
First diode；
Wherein, the positive pole of first diode is connected with the second end of the inductance, the drain electrode of negative pole and the FET
Connection, the first end of the inductance is connected with the negative pole of driving power supply.
11. a kind of power supplys, it is characterised in that eliminate circuit including the ripple as described in any one of claim 1~10.
12. a kind of LEDs, it is characterised in that eliminate circuit including the ripple as described in any one of claim 1~10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611086080.2A CN106793261A (en) | 2016-11-30 | 2016-11-30 | Ripple eliminates circuit, power supply and LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611086080.2A CN106793261A (en) | 2016-11-30 | 2016-11-30 | Ripple eliminates circuit, power supply and LED |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106793261A true CN106793261A (en) | 2017-05-31 |
Family
ID=58915106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611086080.2A Pending CN106793261A (en) | 2016-11-30 | 2016-11-30 | Ripple eliminates circuit, power supply and LED |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106793261A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109640461A (en) * | 2019-02-20 | 2019-04-16 | 广东励晶智能照明有限公司 | LED drive circuit and headlamp |
| CN113242629A (en) * | 2021-05-12 | 2021-08-10 | 深圳市正远科技有限公司 | Follow anti short-circuit protection of adjusting luminance and remove ripple circuit |
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| CN203788531U (en) * | 2014-04-30 | 2014-08-20 | 广东瑞德智能科技股份有限公司 | Silicon controlled rectifier dimming LED power ripple suppression circuit |
| CN205160875U (en) * | 2015-11-26 | 2016-04-13 | 杭州塞勒尼光电科技有限公司 | Built -in power frequency ripple module circuit that goes of LED panel light |
| CN105873279A (en) * | 2016-05-23 | 2016-08-17 | 东莞市领冠半导体照明有限公司 | High-power-factor stroboflash removal circuit for LED power supply |
| CN206283687U (en) * | 2016-11-30 | 2017-06-27 | 江西美的贵雅照明有限公司 | Ripple eliminates circuit, power supply and LED |
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2016
- 2016-11-30 CN CN201611086080.2A patent/CN106793261A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203788531U (en) * | 2014-04-30 | 2014-08-20 | 广东瑞德智能科技股份有限公司 | Silicon controlled rectifier dimming LED power ripple suppression circuit |
| CN205160875U (en) * | 2015-11-26 | 2016-04-13 | 杭州塞勒尼光电科技有限公司 | Built -in power frequency ripple module circuit that goes of LED panel light |
| CN105873279A (en) * | 2016-05-23 | 2016-08-17 | 东莞市领冠半导体照明有限公司 | High-power-factor stroboflash removal circuit for LED power supply |
| CN206283687U (en) * | 2016-11-30 | 2017-06-27 | 江西美的贵雅照明有限公司 | Ripple eliminates circuit, power supply and LED |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109640461A (en) * | 2019-02-20 | 2019-04-16 | 广东励晶智能照明有限公司 | LED drive circuit and headlamp |
| CN109640461B (en) * | 2019-02-20 | 2024-04-23 | 广东励晶智能照明有限公司 | LED driving circuit and lighting lamp |
| CN113242629A (en) * | 2021-05-12 | 2021-08-10 | 深圳市正远科技有限公司 | Follow anti short-circuit protection of adjusting luminance and remove ripple circuit |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 335400 Luohe Industrial Park No. 1, Guixi City, Yingtan City, Jiangxi Province Applicant after: Meizhi Photoelectric Technology Co., Ltd. Applicant after: Midea Group Co., Ltd. Address before: 335400 Luohe Industrial Park No. 1, Guixi City, Yingtan City, Jiangxi Province Applicant before: Jiangxi Meidi Guiya Lighting Co., Ltd. Applicant before: Midea Group Co., Ltd. |
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| CB02 | Change of applicant information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170531 |
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| RJ01 | Rejection of invention patent application after publication |