CN105939559B - A kind of low frequency dodges AC LED circuit - Google Patents
A kind of low frequency dodges AC LED circuit Download PDFInfo
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- CN105939559B CN105939559B CN201610537151.XA CN201610537151A CN105939559B CN 105939559 B CN105939559 B CN 105939559B CN 201610537151 A CN201610537151 A CN 201610537151A CN 105939559 B CN105939559 B CN 105939559B
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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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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a kind of low frequency to dodge AC LED driver circuit, including：Drive IC, LED string D0, LED string D1, LED string D2, LED string D3, LED string D4, PMOS M0, PMOS M1, PMOS M2, PMOS M3, PMOS M4, current-limiting resistance Rs.The method that the present invention is combined using grid negative-feedback and source feedback, controls the conducting electric current of different LED segments, different voltage LED total load power is maintained unanimously so that LED light variations of flux very little；Using the structure of low current during low-voltage to high-voltage large current so that in wide-range input voltage section, LED load power keeps stable；Using high-end PMOS control pipes and LED strip connection circuit, ensure that system still has greater efficiency in low-voltage；Drive efficiency is fundamentally added, improves power factor, metal-oxide-semiconductor switch power is reduced, reduces stroboscopic.
Description
Technical field
The invention belongs to technology of semiconductor illumination application field, more particularly to a kind of low frequency dodges AC LED circuit structure.
Background technology
At present, LED chip is widely applied with its efficient, high integration, high life in novel energy-conserving light source field.
In LED light source, power drives are the crucial technologies of comparison.Because the high integration and low cost applied to LED require, nothing
The share that the AC LED drive scheme of the energy storage devices such as inductance capacitance accounts in the market is increasing.In such drive scheme,
Control IC controls the quantity for the LED for being actually turned on electric current process by being adjusted to the grid voltage of LED channel selector metal-oxide-semiconductors,
To make up because conducting electric current is to the tetchiness of input voltage caused by LED is non-linear, so as to reach current limliting purpose.Fig. 3
A typical segmented LED driving structure is shown, when input voltage is relatively low, first paragraph LED is lit first；When input electricity
Pressure gradually rises, behind several sections of LED lighted step by step, until final stage LED is lit.In segmented LED actuation techniques,
The stroboscopic nature of the compatibility and LED of driving and controllable silicon TRIAC light modulators is the index that client compares care.Fig. 4
Show that conventional AC LED drives the current curve when AC drives.As can be seen that when input voltage changes, LED electricity is segmented
Stream has large change, and the curent change is embodied on LED light flux, turns into one and input voltage frequency identical luminous flux becomes
Change.For full-wave rectification input voltage frequency generally in 100Hz or so, the stroboscopic of such a frequency can be to human visual nerve center
Pessimal stimulation is produced, easily causes the eye strain even symptom such as headache.
The content of the invention
The purpose of the present invention is：A kind of low frequency is provided and dodges AC LED circuit, can be in the full voltage wave band model that LED is lighted
Enclose and interior realize relatively uniform electrical power output so that LED light flux change in whole voltage cycle it is smaller, so as to substantially reduce
AC LED stroboscopic index.
The technical scheme is that：A kind of low frequency dodges AC LED driver circuit, including：Drive IC, LED string D0,
LED string D1, LED string D2, LED string D3, LED string D4, PMOS M0, PMOS M1, PMOS M2, PMOS M3,
PMOS M4, current-limiting resistance Rs；
Control IC is used to control PMOS M0, PMOS M1, PMOS M2, PMOS M3, PMOS M4 grid voltage；
LED string D0 positive pole is connected with PMOS M0 source electrode, LED string D0 negative pole and PMOS M0 drain electrode phase
Even；
Connected between LED string D0, LED string D1, LED string D2, LED string D3, LED string D4, LED string D0's
The half of conducting voltage of the conducting voltage less than LED string D4；LED string D1, LED string D2, LED string D3, LED
String D4 peak power reduces successively from big to small；
PMOS M0 source electrode is connected with the positive pole of dc source；
PMOS M1 source electrode is connected with LED string D1 negative pole；
PMOS M2 source electrode is connected with LED string D2 negative pole；
PMOS M3 source electrode is connected with LED string D3 negative pole；
PMOS M4 source electrode is connected with LED string D4 negative pole；
PMOS M1, PMOS M2, PMOS M3, PMOS M4 drain electrode pass through the negative of current-limiting resistance Rs and dc source
Extremely it is connected；
When input direct voltage starts from scratch increase, electric current is added on LED string D1 by PMOS M0, LED string
D1 is lighted；
When input voltage reach can simultaneously lightening LED lamp string D0 and LED string D1 when, PMOS M0 conducting, PMOS
M1 is turned on, PMOS M2 cut-offs, PMOS M3 cut-offs, PMOS M4 cut-offs, electric current by LED string D0 and LED string D1,
LED string D0 and LED string D1 are lighted；
When input voltage reach can simultaneously lightening LED lamp string D1, LED string D2 when, PMOS M0 conducting, PMOS M2
Corresponding conducting, PMOS M1 cut-offs, PMOS M3 cut-offs, PMOS M4 cut-offs, electric current by LED string D1, LED string D2,
LED string D1, LED string D2 are lighted；Now, when LED string D1, LED string D2 electric current need to be less than LED string D1 conductings
Electric current；
When input voltage reach can simultaneously lightening LED lamp string D0, LED string D1, LED string D2 when, PMOS M0 is led
Logical, PMOS M2 conductings, PMOS M1 ends, PMOS M3 cut-offs, PMOS M4 cut-offs, and electric current passes through LED string D0, LED
Lamp string D1, LED string D2, LED string D0, LED string D1, LED string D2 are lighted；
When input voltage reach can simultaneously lightening LED lamp string D1, LED string D2, LED string D3 when, PMOS M0 is led
Logical, PMOS M3 conductings, PMOS M1 ends, PMOS M2 cut-offs, PMOS M4 cut-offs, and electric current passes through LED string D1, LED
Lamp string D2, LED string D3, LED string D1, LED string D2, LED string D3 are lighted；
When input voltage reach can simultaneously lightening LED lamp string D1, LED string D2, LED string D3, LED string D4 when,
PMOS M0 is turned on, and PMOS M4 is accordingly turned on, PMOS M1 cut-offs, PMOS M2 cut-offs, PMOS M3 cut-offs, and electric current passes through
LED string D1, LED string D2, LED string D3, LED string D4, LED string D1, LED string D2, LED string D3, LED string
D4 is lighted；
Further, in DC power supply terminal plus a valley fill circuit, valley fill circuit be used to improving Dc source power because
Number and reduction stroboscopic.
Further, IC storage capacitor is driven to control pin to add storage capacitor C1, when driving IC judges input direct-current
When power supply is zero, to LED string D0, LED string D1, LED string D2, LED string D3, LED string D4 power supplies, direct current is eliminated
Stroboscopic caused by LED string D0, LED string D1, LED string D2, LED string D3, LED string D4 extinguish when source is zero.
The method that the present invention is combined using grid negative-feedback and source feedback, controls the conducting electric current of different LED segments, makes not
Maintained unanimously with voltage LED total load power so that LED light variations of flux very little；Using low current during low-voltage to height
The structure of voltage high-current so that LED load power keeps stable in wide-range input voltage section；Controlled using high-end PMOS
Pipe and LED strip connection circuit, ensure that system still has greater efficiency in low-voltage；Drive efficiency is fundamentally added, is carried
High power factor, reduces metal-oxide-semiconductor switch power, reduces stroboscopic.
Brief description of the drawings
Fig. 1 is circuit theory diagrams of the present invention；
Circuit theory diagrams when Fig. 2 adds storage capacitor C1 for the present invention；
Fig. 3 is typical segmented LED driving structures；
Fig. 4 is current curve of the conventional AC LED drivings when AC drives.
Embodiment
Embodiment 1：Referring to Fig. 1, a kind of low frequency dodges AC LED driver circuit, including：Drive IC, LED string D0, LED
String D1, LED string D2, LED string D3, LED string D4, PMOS M0, PMOS M1, PMOS M2, PMOS M3, PMOS
M4, current-limiting resistance Rs；
Control IC is used to control PMOS M0, PMOS M1, PMOS M2, PMOS M3, PMOS M4 grid voltage；
LED string D0 positive pole is connected with PMOS M0 source electrode, LED string D0 negative pole and PMOS M0 drain electrode phase
Even；
Connected between LED string D0, LED string D1, LED string D2, LED string D3, LED string D4, LED string D0's
The half of conducting voltage of the conducting voltage less than LED string D4；LED string D1, LED string D2, LED string D3, LED
String D4 peak power reduces successively from big to small；
PMOS M0 source electrode is connected with the positive pole of dc source；
PMOS M1 source electrode is connected with LED string D1 negative pole；
PMOS M2 source electrode is connected with LED string D2 negative pole；
PMOS M3 source electrode is connected with LED string D3 negative pole；
PMOS M4 source electrode is connected with LED string D4 negative pole；
PMOS M1, PMOS M2, PMOS M3, PMOS M4 drain electrode pass through the negative of current-limiting resistance Rs and dc source
Extremely it is connected；
When input direct voltage starts from scratch increase, electric current is added on LED string D1 by PMOS M0, LED string
D1 is lighted；
When input voltage reach can simultaneously lightening LED lamp string D0 and LED string D1 when, PMOS M0 conducting, PMOS
M1 is turned on, PMOS M2 cut-offs, PMOS M3 cut-offs, PMOS M4 cut-offs, electric current by LED string D0 and LED string D1,
LED string D0 and LED string D1 are lighted；
When input voltage reach can simultaneously lightening LED lamp string D1, LED string D2 when, PMOS M0 conducting, PMOS M2
Corresponding conducting, PMOS M1 cut-offs, PMOS M3 cut-offs, PMOS M4 cut-offs, electric current by LED string D1, LED string D2,
LED string D1, LED string D2 are lighted；Now, when LED string D1, LED string D2 electric current need to be less than LED string D1 conductings
Electric current；
When input voltage reach can simultaneously lightening LED lamp string D0, LED string D1, LED string D2 when, PMOS M0 is led
Logical, PMOS M2 conductings, PMOS M1 ends, PMOS M3 cut-offs, PMOS M4 cut-offs, and electric current passes through LED string D0, LED
Lamp string D1, LED string D2, LED string D0, LED string D1, LED string D2 are lighted；
When input voltage reach can simultaneously lightening LED lamp string D1, LED string D2, LED string D3 when, PMOS M0 is led
Logical, PMOS M3 conductings, PMOS M1 ends, PMOS M2 cut-offs, PMOS M4 cut-offs, and electric current passes through LED string D1, LED
Lamp string D2, LED string D3, LED string D1, LED string D2, LED string D3 are lighted；
When input voltage reach can simultaneously lightening LED lamp string D1, LED string D2, LED string D3, LED string D4 when,
PMOS M0 is turned on, and PMOS M4 is accordingly turned on, PMOS M1 cut-offs, PMOS M2 cut-offs, PMOS M3 cut-offs, and electric current passes through
LED string D1, LED string D2, LED string D3, LED string D4, LED string D1, LED string D2, LED string D3, LED string
D4 is lighted.
Embodiment 2, on the basis of a kind of 1 low frequency of embodiment dodges AC LED driver circuit, in DC power supply terminal plus one
Valley fill circuit, valley fill circuit is used to improve Dc source power factor, so as to reduce stroboscopic.
Embodiment 3, referring to Fig. 2, on the basis of a kind of 1 low frequency of embodiment dodges AC LED driver circuit, drive IC storage
Energy Capacity control pin adds storage capacitor C1, when it is zero to drive IC to judge input DC power, to LED string D0, LED string
D1, LED string D2, LED string D3, LED string D4 power supplies, eliminate dc source LED string D0 when being zero, LED string D1,
Stroboscopic caused by LED string D2, LED string D3, LED string D4 extinguish.
Claims (3)
1. a kind of low frequency dodges AC LED driver circuit, it is characterised in that including：Drive IC, LED string D0, LED string D1,
LED string D2, LED string D3, LED string D4, PMOS M0, PMOS M1, PMOS M2, PMOS M3, PMOS M4, limit
Leakage resistance Rs；
Driving IC is used to control PMOS M0, PMOS M1, PMOS M2, PMOS M3, PMOS M4 grid voltage；
LED string D0 positive pole is connected with PMOS M0 source, and LED string D0 negative pole is connected with PMOS M0 leakage；
Connected between LED string D0, LED string D1, LED string D2, LED string D3, LED string D4, LED string D0 conducting
The half of conducting voltage of the voltage less than LED string D4；LED string D1, LED string D2, LED string D3, LED string D4
Peak power reduce successively from big to small；
PMOS M0 source is connected with the positive pole of dc source；
PMOS M1 source electrode is connected with LED string D1 negative pole；
PMOS M2 source electrode is connected with LED string D2 negative pole；
PMOS M3 source electrode is connected with LED string D3 negative pole；
PMOS M4 source electrode is connected with LED string D4 negative pole；
The negative pole phase that PMOS M1, PMOS M2, PMOS M3, PMOS M4 drain electrode pass through current-limiting resistance Rs and dc source
Even；
When input direct voltage starts from scratch increase, electric current is added on LED string D1 by PMOS M0, LED string D1 points
It is bright；
When input voltage reach can lightening LED lamp string D0 and LED string D1 simultaneously when, PMOS M0 conductings, PMOS M1 leads
Logical, PMOS M2 cut-offs, PMOS M3 ends, and PMOS M4 cut-offs, electric current passes through LED string D0 and LED string D1, LED
String D0 and LED string D1 is lighted；
When input voltage reach can lightening LED lamp string D1, LED string D2 simultaneously when, PMOS M0 conductings, PMOS M2 is corresponding
Conducting, PMOS M1 cut-offs, PMOS M3 cut-offs, PMOS M4 cut-offs, electric current pass through LED string D1, LED string D2, LED
String D1, LED string D2 are lighted；Now, electricity when LED string D1, LED string D2 electric current need to be less than LED string D1 conductings
Stream；
When input voltage reach can simultaneously lightening LED lamp string D0, LED string D1, LED string D2 when, PMOS M0 conducting,
PMOS M2 is turned on, PMOS M1 cut-offs, PMOS M3 cut-offs, PMOS M4 cut-offs, and electric current passes through LED string D0, LED string
D1, LED string D2, LED string D0, LED string D1, LED string D2 are lighted；
When input voltage reach can simultaneously lightening LED lamp string D1, LED string D2, LED string D3 when, PMOS M0 conducting,
PMOS M3 is turned on, PMOS M1 cut-offs, PMOS M2 cut-offs, PMOS M4 cut-offs, and electric current passes through LED string D1, LED string
D2, LED string D3, LED string D1, LED string D2, LED string D3 are lighted；
When input voltage reach can simultaneously lightening LED lamp string D1, LED string D2, LED string D3, LED string D4 when, PMOS
Pipe M0 is turned on, and PMOS M4 is accordingly turned on, PMOS M1 cut-offs, PMOS M2 cut-offs, PMOS M3 cut-offs, and electric current passes through LED
Lamp string D1, LED string D2, LED string D3, LED string D4, LED string D1, LED string D2, LED string D3, LED string D4
Light.
2. a kind of low frequency as claimed in claim 1 dodges AC LED driver circuit, it is characterised in that：In DC power supply terminal plus one
Individual valley fill circuit, valley fill circuit are used to improve Dc source power factor and reduce stroboscopic.
3. a kind of low frequency as claimed in claim 1 dodges AC LED driver circuit, it is characterised in that：Drive IC storage capacitor
Control pin adds storage capacitor C1, when it is zero to drive IC to judge input DC power, to LED string D0, LED string D1, LED
Lamp string D2, LED string D3, LED string D4 power supplies, eliminate LED string D0, LED string D1, LED string when dc source is zero
Stroboscopic caused by D2, LED string D3, LED string D4 extinguish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610537151.XA CN105939559B (en) | 2016-07-08 | 2016-07-08 | A kind of low frequency dodges AC LED circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610537151.XA CN105939559B (en) | 2016-07-08 | 2016-07-08 | A kind of low frequency dodges AC LED circuit |
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| CN105939559A CN105939559A (en) | 2016-09-14 |
| CN105939559B true CN105939559B (en) | 2018-02-23 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5188690B2 (en) * | 2006-08-29 | 2013-04-24 | アバゴ・テクノロジーズ・イーシービーユー・アイピー（シンガポール）プライベート・リミテッド | Apparatus and method for driving an LED |
| JP2012123973A (en) * | 2010-12-07 | 2012-06-28 | Yoshikawa Rf System Kk | Led lighting device |
| US8686651B2 (en) * | 2011-04-13 | 2014-04-01 | Supertex, Inc. | Multiple stage sequential current regulator |
| CN103179764B (en) * | 2013-04-12 | 2016-07-06 | 广州怡泰照明电子科技有限公司 | A kind of LED with self-adaptive driving circuit and self-adaptive driving circuit |
| CN105282929B (en) * | 2015-10-20 | 2018-04-27 | 晨辉光宝科技有限公司 | A kind of full voltage piece-wise linear constant current LED drive circuit of automatic switchover mode |
| CN205754976U (en) * | 2016-07-08 | 2016-11-30 | 易美芯光（北京）科技有限公司 | A kind of low stroboscopic AC LED circuit |
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Effective date of registration: 20220808 Address after: 100176 2nd floor, building 3, courtyard 58, jinghaiwu Road, Beijing Economic and Technological Development Zone, Daxing District, Beijing Patentee after: Beijing Yimei New Technology Co.,Ltd. Address before: 100176, No. 4, 2 building, Huilong Sen science and Technology Park, 99 Chuang fourteen street, Daxing District economic and Technological Development Zone, Beijing. Patentee before: SHINEON (BEIJING) TECHNOLOGY Co.,Ltd. |
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