CN208241947U - High PF, can be achieved output larger current without stroboscopic LED lamp drive circuit - Google Patents
High PF, can be achieved output larger current without stroboscopic LED lamp drive circuit Download PDFInfo
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- CN208241947U CN208241947U CN201820860944.XU CN201820860944U CN208241947U CN 208241947 U CN208241947 U CN 208241947U CN 201820860944 U CN201820860944 U CN 201820860944U CN 208241947 U CN208241947 U CN 208241947U
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- electronic filter
- zener diode
- diode
- stroboscopic
- oxide
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Abstract
The utility model discloses a kind of high PF, can be achieved output larger current without stroboscopic LED lamp drive circuit, it is characterized in that it includes the rectification circuit, single- stage PFC, electronic filter being sequentially connected, the input terminal of alternating current 220V input connection rectification circuit, the output end output low ripple of electronic filter is without stroboscopic electric current, wherein electronic filter includes resistance R1, electrolytic capacitor EC1, diode D1, the first zener diode ZD1, the second zener diode ZD2 and several metal-oxide-semiconductors, the positive input terminal of electronic filter.For this programme using high PF constant pressure+without stroboscopic driving circuit, system schema is simple: constant current accuracy≤3% may be implemented, output ripple coefficient < 5% keeps lamp tube service life longer, will not generate visual fatigue to human eye；Scheme is at low cost, high reliablity, is suitble to large-scale application.
Description
Technical field
The utility model relates to arrive the driving power field of room lighting LED light, output specifically a kind of high PF, can be achieved
Larger current without stroboscopic LED lamp drive circuit.
Background technique
In recent years, environmentally protective, energy-efficient requirement is answered, has the service life long, energy-efficient, the LED light of high photosynthetic efficiency has replaced
Conventional incandescent, energy-saving lamp.And common LED illuminates, power factor is able to achieve power factor 0.9, but light source still has work
Frequency flicker problem；And LED light source stroboscopic has some harm, easily causes visual fatigue, causes vision impairment.
The features such as no stroboscopic, low harmony wave, high efficiency, high PF value has been the mainstream requirement of current illuminator.
High PF probably has following several schemes without stroboscopic LED light currently on the market:
A. two-step scheme PFC+PWM realizes output constant current without stroboscopic；
B. special chip LLC resonance oscillation semi-bridge scheme realizes single channel output constant current without stroboscopic；
C. valley-fill circuit is, it can be achieved that high PF, no stroboscopic, but harmonic wave is very high.
Three of the above scheme can realize PF > 0.9, and point bright light source is without stroboscopic function, but scheme a and b two-step scheme
Cost is very high, and power volume is very big, is unable to satisfy lamp power small form factor requirements.Scheme c harmonic wave is very high.
Two-step scheme PFC+PWM schematic block circuit diagram in the market as shown in Figure 1, there are at high cost, volume is larger, is difficult wide
General the problems such as being used for domestic lighting；The single- stage PFC as shown in Fig. 2-Fig. 3 (power supply output goes stroboscopic module using IC) functional block diagram,
Bigger filtering electrolysis is needed when in the presence of output larger current and goes stroboscopic MOS that radiation fin is needed to radiate, overall volume and cost meeting
Higher than this programme.
Utility model content
The utility model is mainly for high PF is required to lamps and lanterns in the market, and no stroboscopic, power volume minimizes, cost effective
Requirement, propose a kind of LED lamp drive circuit that stroboscopic circuit is removed using single-stage PCF+.
Technical solution:
A kind of high PF, can be achieved output larger current without stroboscopic LED lamp drive circuit, it include be sequentially connected it is whole
Current circuit, single- stage PFC, electronic filter, the input terminal of alternating current 220V input connection rectification circuit, the output end of electronic filter
Low ripple is exported without stroboscopic electric current, wherein electronic filter includes resistance R1, electrolytic capacitor EC1, diode D1, the first pressure stabilizing two
Pole pipe ZD1, the second zener diode ZD2 and several metal-oxide-semiconductors, the positive input terminal of electronic filter:
One end of first aspect connection resistance R1；
Second aspect connects the drain electrode for being separately connected each metal-oxide-semiconductor；
The other end of resistance R1, each metal-oxide-semiconductor grid be all connected with the anode of electrolytic capacitor EC1, the cathode of electrolytic capacitor EC1
Connect the negative input end and negative output terminal of electronic filter, the positive output end of the source electrode connection electronic filter of each metal-oxide-semiconductor；Resistance
R1 and electrolytic capacitor EC1 constitutes RC filter circuit, normal to change the filter circuit time by the value for adjusting resistance and filter capacitor
Number, and then the AC compounent of different frequency can be filtered out；Multiple metal-oxide-semiconductors are in parallel, to realize that larger current exports, while multiple
Metal-oxide-semiconductor parallel connection can disperse pyrotoxin, reduce using single MOS fever serious problems, can also eliminate the need for cooling fin, volume can
With miniaturization, stroboscopic IC and big MOS cost is gone to want low relatively relative to dedicated.
Preferably, it further includes diode D1 and the first zener diode ZD1, the anode connection electronic filtering of diode D1
The positive input terminal of device, the cathode of diode D1 connect the cathode of the first zener diode ZD1, and the first zener diode ZD1 is just
The anode of pole connection electrolytic capacitor EC1；Diode D1 and the first zener diode ZD1 is used for clipping, stablizes grid voltage.
Preferably, it further includes the anode connection electronic filtering of the second zener diode ZD2, the second zener diode ZD2
The positive output end of device, the anode of the cathode connection electrolytic capacitor EC1 of the second zener diode ZD2；The second zener diode is added
ZD2 is used for short-circuit protection metal-oxide-semiconductor grid, keeps circuit more safe and reliable.
Preferably, several metal-oxide-semiconductors are that small size encapsulates SOT-23.
The beneficial effects of the utility model
For this programme using high PF constant pressure+without stroboscopic driving circuit, system schema is simple: constant current accuracy≤3% may be implemented,
Output ripple coefficient < 5%, keeps lamp tube service life longer, will not generate visual fatigue to human eye；Scheme is at low cost, high reliablity,
It is suitble to large-scale application.
Detailed description of the invention
Fig. 1 is two-step scheme PFC+PWM schematic block circuit diagram currently on the market.
Fig. 2 is that single- stage PFC+IC removes stroboscopic module functional block diagram.
Fig. 3 is that IC removes stroboscopic module circuit diagram in Fig. 2.
Fig. 4 is that the high PF constant pressure+electronic filter of the utility model removes stroboscopic circuit block diagram.
Fig. 5 is that electronic filter removes stroboscopic circuit block diagram in Fig. 4.
Specific embodiment
Below with reference to embodiment, the utility model is described in further detail, but the protection scope of the utility model is not limited to
This:
Embodiment 1: in conjunction with Fig. 4, a kind of high PF, can be achieved output larger current without stroboscopic LED lamp drive circuit:
It includes the rectification circuit, single- stage PFC, electronic filter being sequentially connected, and alternating current 220V input connects the input terminal of rectification circuit,
The output end output low ripple of electronic filter is without stroboscopic electric current, and in conjunction with Fig. 5, wherein electronic filter includes resistance R1, electrolysis
Capacitor EC1, diode D1, the first zener diode ZD1, the second zener diode ZD2 and several metal-oxide-semiconductors, electronic filter
Positive input terminal:
One end of first aspect connection resistance R1；
Second aspect connects the drain electrode for being separately connected each metal-oxide-semiconductor；
The other end of resistance R1, each metal-oxide-semiconductor grid be all connected with the anode of electrolytic capacitor EC1, the cathode of electrolytic capacitor EC1
Connect the negative input end and negative output terminal of electronic filter, the positive output end of the source electrode connection electronic filter of each metal-oxide-semiconductor；Resistance
R1 and electrolytic capacitor EC1 constitutes RC filter circuit, normal to change the filter circuit time by the value for adjusting resistance and filter capacitor
Number, and then the AC compounent of different frequency can be filtered out；When metal-oxide-semiconductor is in constant current area, if gate source voltage Vgs is constant, flow through
Drain-source current Igs is constant, and MOS has constant-current characteristics at this time, so that output loading is eliminated AC compounent, reaches no stroboscopic purpose.It is more
A metal-oxide-semiconductor is in parallel, to realize that larger current exports, while multiple metal-oxide-semiconductor parallel connections can disperse pyrotoxin, reduces using single
MOS generate heat serious problems, cooling fin can also be eliminated the need for, volume can minimize, relative to it is dedicated go stroboscopic IC and big MOS at
This wants low relatively.
Embodiment 2: driving circuit as described in Example 1, it further includes diode D1 and the first zener diode ZD1,
The positive input terminal of the anode connection electronic filter of diode D1, the cathode of diode D1 connect the first zener diode ZD1's
Cathode, the anode of the anode connection electrolytic capacitor EC1 of the first zener diode ZD1；Diode D1 and the first zener diode ZD1
For clipping, stablize grid voltage.
Embodiment 3: driving circuit as described in Example 1, it further includes the second zener diode ZD2, the second pressure stabilizing two
The positive output end of the anode connection electronic filter of pole pipe ZD2, the cathode of the second zener diode ZD2 connect electrolytic capacitor EC1
Anode；The second zener diode ZD2 is added for short-circuit protection metal-oxide-semiconductor grid, keeps circuit more safe and reliable.
In the present embodiment, several metal-oxide-semiconductors are that small size encapsulates SOT-23.
The scheme of above-described embodiment, through single- stage PFC circuit of power factor correction after AC rectification, power factor be can be improved
It to 0.95 or more, can inhibit to generate a large amount of current harmonics and reactive power, pollution will not be generated to power grid.
Specific embodiment described herein is only to illustrate to the spirit of the present invention.The utility model institute
Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Claims (4)
1. a kind of high PF, can be achieved output larger current without stroboscopic LED lamp drive circuit, it is characterised in that it include sequentially
Connected rectification circuit, single- stage PFC, electronic filter, the input terminal of alternating current 220V input connection rectification circuit, electronic filter
Output end output low ripple without stroboscopic electric current, wherein electronic filter includes resistance R1, electrolytic capacitor EC1, diode D1, the
One zener diode ZD1, the second zener diode ZD2 and several metal-oxide-semiconductors, the positive input terminal of electronic filter:
One end of first aspect connection resistance R1；
Second aspect connects the drain electrode for being separately connected each metal-oxide-semiconductor；
The other end of resistance R1, each metal-oxide-semiconductor grid be all connected with the anode of electrolytic capacitor EC1, the cathode connection of electrolytic capacitor EC1
The negative input end and negative output terminal of electronic filter, the positive output end of the source electrode connection electronic filter of each metal-oxide-semiconductor.
2. driving circuit according to claim 1, it is characterised in that it further includes diode D1 and the first zener diode
The positive input terminal of the anode connection electronic filter of ZD1, diode D1, the cathode of diode D1 connect the first zener diode
The cathode of ZD1, the anode of the anode connection electrolytic capacitor EC1 of the first zener diode ZD1.
3. driving circuit according to claim 1, it is characterised in that it further includes the second zener diode ZD2, and second is steady
The positive output end of the anode connection electronic filter of diode ZD2 is pressed, the cathode of the second zener diode ZD2 connects electrolytic capacitor
The anode of EC1.
4. driving circuit according to claim 1, it is characterised in that several metal-oxide-semiconductors are that small size encapsulates SOT-23.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820860944.XU CN208241947U (en) | 2018-06-04 | 2018-06-04 | High PF, can be achieved output larger current without stroboscopic LED lamp drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820860944.XU CN208241947U (en) | 2018-06-04 | 2018-06-04 | High PF, can be achieved output larger current without stroboscopic LED lamp drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208241947U true CN208241947U (en) | 2018-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820860944.XU Expired - Fee Related CN208241947U (en) | 2018-06-04 | 2018-06-04 | High PF, can be achieved output larger current without stroboscopic LED lamp drive circuit |
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| Country | Link |
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| CN (1) | CN208241947U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110996456A (en) * | 2019-12-27 | 2020-04-10 | 东莞艾笛森光电有限公司 | Low-frequency lightning circuit without electrolytic capacitor |
-
2018
- 2018-06-04 CN CN201820860944.XU patent/CN208241947U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110996456A (en) * | 2019-12-27 | 2020-04-10 | 东莞艾笛森光电有限公司 | Low-frequency lightning circuit without electrolytic capacitor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181214 |