CN203788531U - Silicon controlled rectifier dimming LED power ripple suppression circuit - Google Patents
Silicon controlled rectifier dimming LED power ripple suppression circuit Download PDFInfo
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- CN203788531U CN203788531U CN201420218051.7U CN201420218051U CN203788531U CN 203788531 U CN203788531 U CN 203788531U CN 201420218051 U CN201420218051 U CN 201420218051U CN 203788531 U CN203788531 U CN 203788531U
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 17
- 239000010703 silicon Substances 0.000 title claims abstract description 17
- 230000001629 suppression Effects 0.000 title abstract description 4
- 239000003990 capacitor Substances 0.000 claims abstract description 26
- 230000005669 field effect Effects 0.000 claims abstract description 15
- 238000001914 filtration Methods 0.000 claims abstract description 14
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000002460 anti-migrenic effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 208000001491 myopia Diseases 0.000 description 1
- 230000004379 myopia Effects 0.000 description 1
- 230000007170 pathology Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The utility model discloses a silicon controlled rectifier dimming LED power ripple suppression circuit comprising a first-stage rectifying and filtering circuit and a second-stage rectifying and filtering circuit. The first-stage rectifying and filtering circuit comprises a secondary coil NS of a transformer T, a diode D1, a resistor R1, and a capacitor C1. The second-stage rectifying and filtering circuit comprises a resistor R2, a capacitor C2, a diode D2, a diode ZD1, and a field effect transistor Q1. The silicon controlled rectifier dimming LED power ripple suppression circuit is formed by cheap connected discrete electronic components, simple in structure, and capable of effectively reducing output ripples of a silicon controlled rectifier dimming LED power and resolving an LED power stroboscopic problem.
Description
Technical field
The utility model relates to switch power technology field, more specifically, relates to a kind of controllable silicon light modulation LED power supply ripple and suppresses circuit.
Background technology
At present, LED application of power is more and more extensive, and LED illumination is loved by the people with its energy-conservation and convenient, flexible dimming mode, quite popular controllable silicon light modulation especially abroad, and controllable silicon light modulation LED lamp is directly replaced incandescent lamp, without the original circuit of change.The market demand is very big.The compatible silicon controlled light adjusting circuit great majority of current main-stream adopt single-stage PFC, object is to improve power factor, but sort circuit has a very large defect, be exactly that output ripple is larger, need very large output capacitance to reduce ripple, and be dual frequency, in the thyristor regulating light time, can cause stroboscopic effect in various degree.Under these light-illuminatings, very easily produce the pathology of myopia, antimigraine and visual system for a long time.For the development trend of compatible silicon controlled light modulation LED power supply, a kind ofly can effectively reduce ripple, without stroboscopic technique, be the key addressing these problems.
Utility model content
The purpose of this utility model, be to provide a kind ofly simplify circuit, reduce costs, LED driving power ripple suppression circuit simple in structure.
To achieve these goals, the technical solution of the utility model is:
A kind of controllable silicon light modulation LED power supply ripple suppresses circuit, comprise one-level current rectifying and wave filtering circuit and secondary filter circuit, they are connected in turn, described one-level rectification circuit comprises transformer T secondary coil NS, diode D1, resistance R 1, capacitor C 1, one end of transformer secondary output coil NS is connected with diode D1 anode, the negative electrode of diode D1 is connected with one end of the common port of capacitor C 1 parallel connection with resistance R 1, and resistance R 1 and the other end of the common port of capacitor C 1 parallel connection and the other end of transformer secondary output coil NS are connected with earth terminal GND, described secondary filter circuit comprises resistance R 2, capacitor C 2, diode D2, diode ZD1, field effect transistor Q1, the drain electrode of field effect transistor Q1 is connected with one end of resistance R 2 with the anode of diode D2, and be connected with the positive pole of capacitor C 1 in one-level rectification circuit, the negative electrode of diode D2 is connected with the negative electrode of diode ZD1, the anode of diode ZD1 is connected with the other end of resistance R 2, the anode of diode ZD1 is also connected with the positive pole of capacitor C 2 with the grid of field effect transistor Q1 respectively, the source electrode of field effect transistor Q1 connects the positive pole of LED load, the negative pole of capacitor C 2 connects the negative pole of LED load.
Described diode D1, D2 are rectifier diode, and diode ZD1 is voltage stabilizing didoe, and described field effect transistor Q1 is N-MOS pipe, and transformer T is high frequency transformer.
One-level current rectifying and wave filtering circuit is conventional electric source filter circuit, as prime filtering, for late-class circuit provides relatively level and smooth stable voltage.Secondary filter circuit is done filtering to prime direct voltage and is processed, and carries out giving LED load after degree of depth smoothing processing.By R2, the filter that C2 forms, capacitor C 2 is by prime C1 two ends output voltage filtering rear drive field effect transistor Q1, and Q1 is operated in variable resistor district.The voltage of capacitor C 2 is stable, and the voltage that makes LED is stable, so that the electric current of LED becomes is level and smooth.The ripple voltage Vc1 of Q1 control capacitance C1, diode D2 and voltage stabilizing didoe ZD1 are in order to suppress to start overvoltage, in start-up course, by D2 and ZD1, capacitor C 2 is full of very soon and makes Q1 open-minded, and electric current is also lighted rapidly by LED, after the voltage VC2 of C2 rising is stable, C2 series connection R2 receives the grid of metal-oxide-semiconductor as filter, have two effects, and the first reduces Vc1.It two is to be equivalent to connect on emitter follower the electric capacity that a capacity is (1+ β) C2.This circuit can effectively reduce HF switch ripple, eliminates LED stroboscopic.
The beneficial effects of the utility model:
1, the utility model is formed by connecting by cheap discrete electronic component, and circuit structure is simple.Can effectively reduce the output ripple of controllable silicon light modulation LED power supply, solve LED power supply stroboscopic problem;
2, in other circuit that the utility model also can extensive use be had relatively high expectations to power supply ripple.
Accompanying drawing explanation
Fig. 1 is that controllable silicon light modulation LED power supply ripple suppresses circuit theory diagrams.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail:
As shown in Figure 1, one-level current rectifying and wave filtering circuit 1 is conventional electric source filter circuit, as prime filtering, for secondary filter circuit 2 provides relatively level and smooth stable voltage.
One-level current rectifying and wave filtering circuit 1, by transformer T secondary coil NS, rectifier diode D1, resistance R 1, capacitor C 1 is connected and forms in turn.The minus earth of C1.
Secondary filter circuit 2, by resistance R 2, capacitor C 2, diode D2, voltage stabilizing didoe ZD1, field effect transistor Q1 forms; Q1 is N-MOS.The drain electrode of Q1 is connected with R2 node with the anode of D2, receives the positive pole of prime filter capacitor C1, and the negative electrode of D2 is connected with the negative electrode of ZD1.D2, in parallel with R1 again after ZD1 differential concatenation, receive the positive pole of C2 and the grid of Q1, the source electrode of Q1 connects the positive pole of LED load.
Secondary filter circuit 2, by resistance R 2, capacitor C 2, diode D2, voltage stabilizing didoe ZD1, field effect transistor Q1 forms ripple codan.By R2, the filter that C2 forms, capacitor C 2 is by the voltage Vc1 filtering rear drive field effect transistor Q1 at prime C1 two ends, and Q1 is operated in variable resistor district.The voltage of capacitor C 2 is stable, and the voltage that makes LED is stable, so that the electric current of LED becomes is level and smooth.The ripple voltage Vc1 of Q1 control capacitance C1, diode D2 and voltage stabilizing didoe ZD1 suppress to start overvoltage, in start-up course, by D2 and ZD1, capacitor C 2 is full of very soon and makes Q1 open-minded, and electric current is also lighted rapidly by LED, after the voltage VC2 of C2 rising is stable, C2 series connection R2 receives the grid of metal-oxide-semiconductor as filter, have two effects, and the first reduces Vc1.It two is to be equivalent to connect on emitter follower the electric capacity that a capacity is (1+ β) C2.This circuit can effectively reduce HF switch ripple, eliminates LED stroboscopic.
The above; it is only preferably specific embodiment of the utility model; but protection range of the present utility model is not only confined to this; in the scope disclosing at the utility model; according to the technical solution of the utility model and utility model design thereof, be equal to replacement or changed, all being belonged to protection range of the present utility model.
Claims (4)
1. a controllable silicon light modulation LED power supply ripple suppresses circuit, comprise one-level current rectifying and wave filtering circuit (1) and secondary filter circuit (2), they are connected in turn, it is characterized in that, described one-level rectification circuit (1) comprises transformer T secondary coil NS, diode D1, resistance R 1, capacitor C 1, one end of transformer secondary output coil NS is connected with diode D1 anode, the negative electrode of diode D1 is connected with one end of the common port of capacitor C 1 parallel connection with resistance R 1, and resistance R 1 and the other end of the common port of capacitor C 1 parallel connection and the other end of transformer secondary output coil NS are connected with earth terminal GND, described secondary filter circuit (2) comprises resistance R 2, capacitor C 2, diode D2, diode ZD1, field effect transistor Q1, the drain electrode of field effect transistor Q1 is connected with one end of resistance R 2 with the anode of diode D2, and be connected with the positive pole of capacitor C 1 in one-level rectification circuit (1), the negative electrode of diode D2 is connected with the negative electrode of diode ZD1, the anode of diode ZD1 is connected with the other end of resistance R 2, the anode of diode ZD1 is also connected with the positive pole of capacitor C 2 with the grid of field effect transistor Q1 respectively, the source electrode of field effect transistor Q1 connects the positive pole of LED load, the negative pole of capacitor C 2 connects the negative pole of LED load.
2. controllable silicon light modulation LED power supply ripple according to claim 1 suppresses circuit, it is characterized in that, described diode D1, D2 are rectifier diode, and diode ZD1 is voltage stabilizing didoe.
3. controllable silicon light modulation LED power supply ripple according to claim 1 suppresses circuit, it is characterized in that, described field effect transistor Q1 is N-MOS pipe.
4. controllable silicon light modulation LED power supply ripple according to claim 1 suppresses circuit, it is characterized in that, described transformer T is high frequency transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420218051.7U CN203788531U (en) | 2014-04-30 | 2014-04-30 | Silicon controlled rectifier dimming LED power ripple suppression circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420218051.7U CN203788531U (en) | 2014-04-30 | 2014-04-30 | Silicon controlled rectifier dimming LED power ripple suppression circuit |
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| CN203788531U true CN203788531U (en) | 2014-08-20 |
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| CN201420218051.7U Expired - Lifetime CN203788531U (en) | 2014-04-30 | 2014-04-30 | Silicon controlled rectifier dimming LED power ripple suppression circuit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104918360A (en) * | 2015-05-03 | 2015-09-16 | 广东瑞德智能科技股份有限公司 | Comprehensive protection circuit of LED power supply |
| 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 |
| CN106793261A (en) * | 2016-11-30 | 2017-05-31 | 江西美的贵雅照明有限公司 | Ripple eliminates circuit, power supply and LED |
| CN108649663A (en) * | 2018-07-04 | 2018-10-12 | 深圳市道通智能航空技术有限公司 | Pressure limiting power supply circuit and electronic equipment |
| WO2021248266A1 (en) * | 2020-06-08 | 2021-12-16 | Tridonic Gmbh & Co Kg | Ripple suppression circuit, controlling method and driving equipment |
-
2014
- 2014-04-30 CN CN201420218051.7U patent/CN203788531U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104918360A (en) * | 2015-05-03 | 2015-09-16 | 广东瑞德智能科技股份有限公司 | Comprehensive protection circuit of LED power supply |
| CN104918360B (en) * | 2015-05-03 | 2018-11-13 | 广东瑞德智能科技股份有限公司 | A kind of comprehensive protection circuit of LED power |
| 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 |
| CN106793261A (en) * | 2016-11-30 | 2017-05-31 | 江西美的贵雅照明有限公司 | Ripple eliminates circuit, power supply and LED |
| CN108649663A (en) * | 2018-07-04 | 2018-10-12 | 深圳市道通智能航空技术有限公司 | Pressure limiting power supply circuit and electronic equipment |
| WO2020007216A1 (en) * | 2018-07-04 | 2020-01-09 | 深圳市道通智能航空技术有限公司 | Voltage-limiting power supply circuit and electronic device |
| CN108649663B (en) * | 2018-07-04 | 2024-05-17 | 深圳市道通智能航空技术股份有限公司 | Voltage-limiting power supply circuit and electronic equipment |
| WO2021248266A1 (en) * | 2020-06-08 | 2021-12-16 | Tridonic Gmbh & Co Kg | Ripple suppression circuit, controlling method and driving equipment |
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Granted publication date: 20140820 |
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