CN104981065A - LED drive device with valley fill circuit - Google Patents
LED drive device with valley fill circuit Download PDFInfo
- Publication number
- CN104981065A CN104981065A CN201510348278.2A CN201510348278A CN104981065A CN 104981065 A CN104981065 A CN 104981065A CN 201510348278 A CN201510348278 A CN 201510348278A CN 104981065 A CN104981065 A CN 104981065A
- Authority
- CN
- China
- Prior art keywords
- diode
- electric capacity
- bridge heap
- rectification module
- pole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 21
- 238000005070 sampling Methods 0.000 claims description 20
- 239000004065 semiconductor Substances 0.000 claims description 16
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 238000001914 filtration Methods 0.000 description 4
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Rectifiers (AREA)
Abstract
The invention discloses an LED drive device with a valley fill circuit. The device includes a bridge rectification module connected to commercial power, a valley fill circuit, a filter capacitor C3, a constant current module connected to the bridge rectification module, and an LED load connected to both the bridge rectification module and the constant current module. One end of the filter capacitor C3 is connected to the output end of the bridge rectification module, and the other end of the capacitor C3 is connected to the ground. The valley fill circuit is connected to the output end of the bridge rectification module. The valley fill circuit is additionally adopted to greatly increase a conduction angle of a rectifier diode, input currents are made to change from spike pulses into waveforms similar to sine waves through valley point filling, the total harmonic distortion is substantially reduced, and a power factor can be increased to be around 0.9. The LED drive device has the advantages of simple structure and low cost.
Description
Technical field
The present invention relates to LED drive circuit field, particularly, relate to and a kind of there is the LED drive device of filling out paddy circuit.
Background technology
LED light source, as a kind of novel green light source, because it has the advantages such as power consumption is low, the life-span is long, reaction speed is fast, energy-efficient, is applied more and more widely.
Under same brightness, LED light source power consumption is only 1/10th of ordinary incandescent lamp, and the life-span can extend 100 times.But its life-span is decided by driving power to a great extent, therefore a kind of reliably, conversion efficiency high, LED driving power that the life-span is long is most important for LED light source.
At present, supply power mode many employings direct current of LED, the civil power of power supply needs to be converted to direct current by rectifier bridge, more luminous by drive circuit driving LED lamp pearl.Its importation is generally made up of bridge rectifier and filtering capacitor, and the two all belongs to non-linear element.Due to the existence of Large Copacity filtering capacitor, make the angle of flow of rectifier diode become very narrow, only ability conducting near the peak value of AC-input voltage, causes AC input current to produce serious distortion, is turned into spike.Contain a large amount of harmonic components in this current waveform, not only pollute electrical network, the active power exported after also causing filtering significantly reduces, and power factor is significantly reduced.
Summary of the invention
Object of the present invention is just that providing a kind of has the LED drive device of filling out paddy circuit, and this LED drive device is improved harmonic wave by filling out paddy circuit, improved power factor (PF).
There is the LED drive device of filling out paddy circuit, comprise bridge heap rectification module, filter capacitor C3, constant flow module, the LED load of access civil power and fill out paddy circuit; Filter capacitor C3 one end is connected to the output of bridge heap rectification module, other end ground connection; Described constant flow module comprises current constant control chip IC 1, metal-oxide-semiconductor Q1, divider resistance R5, regulating resistance R6, sampling resistor R7 and sampling resistor R8; The output of described LED load positive pole connecting bridge heap rectification module, negative pole connects the D pole of metal-oxide-semiconductor Q1; The power input of current constant control chip IC 1 is connected to the output of bridge heap rectification module by divider resistance R5; The sampling end of current constant control chip IC 1 is connected respectively to D pole and the S pole of metal-oxide-semiconductor Q1 by sampling resistor R7 and sampling resistor R8, the S pole of metal-oxide-semiconductor Q1 is also connected to the output of current constant control chip IC 1 by regulating resistance R6 ground connection, G pole; Fill out paddy circuit and comprise electric capacity C4, electric capacity C5 and diode D4, diode D2, diode D3, the output of electric capacity C4 one end connecting bridge heap rectification module, the other end connect the negative pole of diode D4, the plus earth of diode D4; One end ground connection of electric capacity C5, the other end connect the positive pole of diode D2, the output of the negative pole connecting bridge heap rectification module of diode D2; The positive pole of diode D3 is connected with the negative pole of diode D4, and the negative pole of diode D3 is connected with the positive pole of diode D2.
As a further improvement on the present invention, above-mentioned have the LED drive device of filling out paddy circuit and also comprise for isolating the diode D1 filling out paddy circuit and bridge heap rectification module, and the diode D1 positive pole connecting bridge heap output of rectification module, negative pole connect electric capacity C4, the negative pole of diode D2, divider resistance R5, LED load positive pole simultaneously.
Further, described bridge heap rectification module is full-bridge rectification bridge heap BD1, two inputs of full-bridge rectification bridge heap BD1 connect civil power live wire and zero line respectively, and the direct current output cathode of full-bridge rectification bridge heap BD1 is connected with the positive pole of diode D1 with electric capacity C3, direct current output negative pole ground connection.
Further, above-mentioned have the LED drive device of filling out paddy circuit and also comprise fuse for surge protection, and full-bridge rectification bridge heap BD1 is connected with civil power live wire by this fuse.
Preferably, the capacitance of described electric capacity C4 and electric capacity C5 is equal, and electric capacity C4 and electric capacity C5 is electrochemical capacitor, and the negative pole of electric capacity C4 connects the negative pole of diode D4, the minus earth of electric capacity C5.
Further, described LED load two ends are also parallel with filter capacitor C2.
Preferably, the resistance of described regulating resistance R6 is 5 Ω.
To sum up, the invention has the beneficial effects as follows: the present invention sets up and fills out paddy circuit to increase considerably the angle of flow of rectifier diode after bridge heap rectification module, by filling and leading up valley point, making input current become the waveform close to sine wave from spike, significantly reducing total harmonic distortion.Power factor can be brought up to about 0.9 by the present invention.Circuit of the present invention is simple, cost is low, power factor compensation Be very effective, and in input circuit, do not need the large inductor using the large heavy of volume.The present invention also has Anti-surging function, prevents the surge in circuit from damaging drive circuit and LED load.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, to the detailed description further of the present invention's do, but embodiments of the present invention are not limited thereto.
[embodiment 1]
As shown in Figure 1, the present embodiment there is the LED drive device of filling out paddy circuit, comprise access civil power bridge heap rectification module, be connected to bridge heap rectification module on constant flow module, filter capacitor C3, LED load and fill out paddy circuit; Wherein: bridge heap rectification module is full-bridge rectification bridge heap BD1, full-bridge rectification bridge heap BD1 is connected and the rectifier bridge stack be packaged as a whole by the form of full-wave bridge rectifier circuit by 4 rectifier diodes, it has two inputs and two outputs, and two outputs are respectively direct current output cathode, direct current output negative pole.Two input access civil powers of full-bridge rectification bridge heap BD1, connect civil power live wire L and zero line N respectively; The direct current output negative pole ground connection of full-bridge rectification bridge heap BD1; The direct current output cathode of full-bridge rectification bridge heap BD1 is the output of bridge heap rectification module, and this direct current output cathode connects electric capacity C3, constant flow module, LED load positive pole simultaneously and fills out paddy circuit.Filter capacitor C3 one end is connected to the output of bridge heap rectification module, other end ground connection.
Constant flow module comprises current constant control chip IC 1, metal-oxide-semiconductor Q1, divider resistance R5, regulating resistance R6, sampling resistor R7 and sampling resistor R8; The direct current output cathode of above-mentioned LED load positive pole connecting bridge heap rectification module, negative pole connects the D pole (drain electrode) of metal-oxide-semiconductor Q1; Current constant control chip IC 1 has power input VH, sampling end CS, earth terminal GND, output GATE, power output end VDD, its earth terminal GND ground connection, and power input VH is connected on bridge heap rectification module by divider resistance R5, obtains operating voltage; Parallel filtering electric capacity C1 on power output end VDD and earth terminal GND, the operating voltage of level and smooth current constant control chip IC 1, makes current constant control chip IC 1 keep steady operation; Sampling end CS is connected respectively to D pole and S pole (source electrode) of metal-oxide-semiconductor Q1 by sampling resistor R7 and sampling resistor R8; Output GATE connects the G pole (grid) of metal-oxide-semiconductor Q1, controls conducting and the cut-off of metal-oxide-semiconductor, and the S pole of metal-oxide-semiconductor Q1 is also by regulating resistance R6 ground connection.
Described paddy circuit of filling out comprises electric capacity C4, electric capacity C5 and diode D4, diode D2, diode D3, the output of electric capacity C4 one end connecting bridge heap rectification module and full-bridge rectification bridge pile the direct current output cathode of BD1, the negative pole of other end connection diode D4, the plus earth of diode D4; One end ground connection of electric capacity C5, the other end connect the positive pole of diode D2, the output of the negative pole connecting bridge heap rectification module of diode D2 and the direct current output cathode of full-bridge rectification bridge heap BD1; The positive pole of diode D3 is connected with the negative pole of diode D4, and the negative pole of diode D3 is connected with the positive pole of diode D2.
In the present embodiment, set up and fill out paddy circuit and fill and lead up circuit, increase considerably the angle of flow of rectifier diode in full-bridge rectification bridge heap BD1, by filling and leading up valley point, making input current become the waveform close to sine wave from spike, significantly reducing total harmonic distortion.Power factor can be brought up to about 0.9 by the present invention.Circuit of the present invention is simple, cost is low, power factor compensation Be very effective, and in input circuit, do not need the large inductor using the large heavy of volume.
Above-mentioned LED load is preferably the LED string that the series connection of multiple LED lamp bead is formed, also can be single led lamp pearl, sampling resistor R7, sampling resistor R8 gather the electric current on LED load loop, current constant control chip IC 1 is according to the conducting state of the Current Control metal-oxide-semiconductor gathered, thus control loop voltage, the ratio reaching loop voltage and resistance is invariable, realizes current constant.
[embodiment 2]
On the basis of embodiment 1, the LED drive device in the present embodiment also comprises fills out paddy circuit and the bridge heap diode D1 of rectification module and the fuse F1 for surge protection for isolating.
Full-bridge rectification bridge heap BD1 is connected with civil power live wire L by fuse F1, and fuse F1 has certain resistance, can absorb peak voltage, has Anti-surging effect.
Diode D1 positive pole connects the direct current output cathode of full-bridge rectification bridge heap BD1, negative pole connects electric capacity C4 simultaneously, the positive pole of the negative pole of diode D2, divider resistance R5, LED load.D1 is isolating diode, full-bridge rectification bridge can be piled BD1 and fill out paddy circuit to separate.Electric capacity C3 is connected on the direct current output cathode of full-bridge rectification bridge heap BD1.
In the present embodiment, the capacitance of electric capacity C4 and electric capacity C5 is equal, and electric capacity C4 and electric capacity C5 is electrochemical capacitor, the negative pole that positive pole connects the direct current output cathode of full-bridge rectification bridge heap BD1, negative pole connects diode D4 of electric capacity C4, positive pole, the minus earth of the cathode connecting diode D2 of electric capacity C5.
Above-mentioned LED load two ends are also parallel with filter capacitor C2, make the stabilized input voltage of LED load.
In the present embodiment, current constant control chip IC 1 adopts ORG8510 constant current chip, and metal-oxide-semiconductor Q1 is N-channel MOS pipe.
Above-mentioned filter capacitor C1 adopts ceramic condenser.
In the present embodiment, the resistance of above-mentioned regulating resistance R6 is 5 Ω, to ensure the voltage that R6 has point compression functions R6 can be avoided again to divide too high; Divider resistance R5, regulating resistance R6, sampling resistor R7, sampling resistor R8 adopt high pressure Chip-R, and filter capacitor C1 and filter capacitor C2 adopts high pressure patch capacitor, to reduce volume shared by drive circuit.
Below be only the preferred embodiment of the present invention, protection scope of the present invention be not only confined to above-described embodiment, all technical schemes belonged under thinking of the present invention all belong to protection scope of the present invention.It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, should be considered as protection scope of the present invention.
Claims (7)
1. there is the LED drive device of filling out paddy circuit, comprise bridge heap rectification module, filter capacitor C3, constant flow module and the LED load of access civil power; Filter capacitor C3 one end is connected to the output of bridge heap rectification module, other end ground connection; Described constant flow module comprises current constant control chip IC 1, metal-oxide-semiconductor Q1, divider resistance R5, regulating resistance R6, sampling resistor R7 and sampling resistor R8; The output of described LED load positive pole connecting bridge heap rectification module, negative pole connects the D pole of metal-oxide-semiconductor Q1; The power input of current constant control chip IC 1 is connected to the output of bridge heap rectification module by divider resistance R5; The sampling end of current constant control chip IC 1 is connected respectively to D pole and the S pole of metal-oxide-semiconductor Q1 by sampling resistor R7 and sampling resistor R8, the S pole of metal-oxide-semiconductor Q1 is also connected to the output of current constant control chip IC 1 by regulating resistance R6 ground connection, G pole; It is characterized in that, also comprise and fill out paddy circuit, this is filled out paddy circuit and comprises electric capacity C4, electric capacity C5 and diode D4, diode D2, diode D3, and the output of electric capacity C4 one end connecting bridge heap rectification module, the other end connect the negative pole of diode D4, the plus earth of diode D4; One end ground connection of electric capacity C5, the other end connect the positive pole of diode D2, the output of the negative pole connecting bridge heap rectification module of diode D2; The positive pole of diode D3 is connected with the negative pole of diode D4, and the negative pole of diode D3 is connected with the positive pole of diode D2.
2. according to claim 1 have the LED drive device of filling out paddy circuit, it is characterized in that, also comprise for isolating the diode D1 filling out paddy circuit and bridge heap rectification module, output, the negative pole of diode D1 positive pole connecting bridge heap rectification module connect electric capacity C4, the negative pole of diode D2, divider resistance R5, LED load positive pole simultaneously.
3. according to claim 2 have the LED drive device of filling out paddy circuit, it is characterized in that, described bridge heap rectification module is full-bridge rectification bridge heap BD1, two inputs of full-bridge rectification bridge heap BD1 connect civil power live wire and zero line respectively, the direct current output cathode of full-bridge rectification bridge heap BD1 is connected with the positive pole of diode D1 with electric capacity C3, direct current output negative pole ground connection.
4. according to claim 3 have the LED drive device of filling out paddy circuit, it is characterized in that, also comprise the fuse for surge protection, and full-bridge rectification bridge heap BD1 is connected with civil power live wire by this fuse.
5. described there is the LED drive device of filling out paddy circuit according to Claims 1-4 is arbitrary, it is characterized in that, the capacitance of described electric capacity C4 and electric capacity C5 is equal, and electric capacity C4 and electric capacity C5 is electrochemical capacitor, the negative pole of electric capacity C4 connects the negative pole of diode D4, the minus earth of electric capacity C5.
6. described have the LED drive device of filling out paddy circuit according to Claims 1-4 is arbitrary, it is characterized in that, described LED load two ends are also parallel with filter capacitor C2.
7. described have the LED drive device of filling out paddy circuit according to Claims 1-4 is arbitrary, it is characterized in that, the resistance of described regulating resistance R6 is 5 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510348278.2A CN104981065A (en) | 2015-06-23 | 2015-06-23 | LED drive device with valley fill circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510348278.2A CN104981065A (en) | 2015-06-23 | 2015-06-23 | LED drive device with valley fill circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104981065A true CN104981065A (en) | 2015-10-14 |
Family
ID=54277007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510348278.2A Pending CN104981065A (en) | 2015-06-23 | 2015-06-23 | LED drive device with valley fill circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104981065A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106028557A (en) * | 2016-07-08 | 2016-10-12 | 上海灿瑞科技股份有限公司 | LED constant current driving circuit with high power factor and low total harmonic distortion |
| CN110927443A (en) * | 2019-12-06 | 2020-03-27 | 深圳朗特智能控制股份有限公司 | Current detection method and circuit after PWM modulation |
| CN113709944A (en) * | 2021-09-09 | 2021-11-26 | 宁波凯耀电器制造有限公司 | PPFC circuit |
| WO2023077250A1 (en) * | 2021-11-04 | 2023-05-11 | 广州庭升电器有限公司 | Led light string power adapter having valley-fill circuit |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004042903A1 (en) * | 2002-11-05 | 2004-05-21 | Dafeng Weng | A quasi-active power factor correction circuit for switching power supply |
| CN201766755U (en) * | 2010-09-10 | 2011-03-16 | 无锡市爱芯科微电子有限公司 | Constant current driving power supply of LED |
| CN102026447A (en) * | 2010-10-18 | 2011-04-20 | 东莞市勤望达光电科技有限公司 | Constant current driving method of fluorescent lamp and its driving circuit |
| CN202068325U (en) * | 2011-05-31 | 2011-12-07 | 宁波市佰仕电器有限公司 | High power factor valley fill circuit |
| CN102781147A (en) * | 2012-08-16 | 2012-11-14 | 广东良得电子科技有限公司 | LED (Light-emitting diode) power supply circuit with high power factor |
| US20120299495A1 (en) * | 2011-05-24 | 2012-11-29 | Nichia Corporation | Light-emitting diode driving apparatus including charging/discharging capacitor |
| CN203225917U (en) * | 2013-03-05 | 2013-10-02 | 上海梅轩实业有限公司 | LED drive circuit module |
| CN203596960U (en) * | 2013-12-17 | 2014-05-14 | 四川新力光源股份有限公司 | Miniature LED drive circuit and LED lamp having same |
| US20150137694A1 (en) * | 2012-05-31 | 2015-05-21 | Silicon Works Co., Ltd. | Power supply circuit for driving led lamp and power supply method, and primary-side control circuit of flyback transformer |
-
2015
- 2015-06-23 CN CN201510348278.2A patent/CN104981065A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004042903A1 (en) * | 2002-11-05 | 2004-05-21 | Dafeng Weng | A quasi-active power factor correction circuit for switching power supply |
| CN201766755U (en) * | 2010-09-10 | 2011-03-16 | 无锡市爱芯科微电子有限公司 | Constant current driving power supply of LED |
| CN102026447A (en) * | 2010-10-18 | 2011-04-20 | 东莞市勤望达光电科技有限公司 | Constant current driving method of fluorescent lamp and its driving circuit |
| US20120299495A1 (en) * | 2011-05-24 | 2012-11-29 | Nichia Corporation | Light-emitting diode driving apparatus including charging/discharging capacitor |
| CN202068325U (en) * | 2011-05-31 | 2011-12-07 | 宁波市佰仕电器有限公司 | High power factor valley fill circuit |
| US20150137694A1 (en) * | 2012-05-31 | 2015-05-21 | Silicon Works Co., Ltd. | Power supply circuit for driving led lamp and power supply method, and primary-side control circuit of flyback transformer |
| CN102781147A (en) * | 2012-08-16 | 2012-11-14 | 广东良得电子科技有限公司 | LED (Light-emitting diode) power supply circuit with high power factor |
| CN203225917U (en) * | 2013-03-05 | 2013-10-02 | 上海梅轩实业有限公司 | LED drive circuit module |
| CN203596960U (en) * | 2013-12-17 | 2014-05-14 | 四川新力光源股份有限公司 | Miniature LED drive circuit and LED lamp having same |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106028557A (en) * | 2016-07-08 | 2016-10-12 | 上海灿瑞科技股份有限公司 | LED constant current driving circuit with high power factor and low total harmonic distortion |
| CN106028557B (en) * | 2016-07-08 | 2018-01-05 | 上海灿瑞科技股份有限公司 | The constant current driver circuit for LED of the low total harmonic distortion of High Power Factor |
| CN110927443A (en) * | 2019-12-06 | 2020-03-27 | 深圳朗特智能控制股份有限公司 | Current detection method and circuit after PWM modulation |
| CN113709944A (en) * | 2021-09-09 | 2021-11-26 | 宁波凯耀电器制造有限公司 | PPFC circuit |
| WO2023077250A1 (en) * | 2021-11-04 | 2023-05-11 | 广州庭升电器有限公司 | Led light string power adapter having valley-fill circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104968101A (en) | Anti-lightning LED power supply protection circuit | |
| CN204697354U (en) | Antisurge LED power circuit | |
| CN201813599U (en) | LED (Light-Emitting Diode) dimmer power | |
| CN104981065A (en) | LED drive device with valley fill circuit | |
| CN103269164B (en) | The quasi-single-stage high power factor circuit of former limit current constant control and device | |
| CN103220856B (en) | Self-adapting light emitting diode (LED) driving power circuit | |
| CN104010405B (en) | A kind of LED light adjusting circuit | |
| CN104981064A (en) | Simple and practical harmonic wave improved LED drive circuit | |
| CN203596960U (en) | Miniature LED drive circuit and LED lamp having same | |
| CN202857064U (en) | Novel wide-input-voltage LED non-isolated single-chip constant-current drive circuit | |
| CN104968075A (en) | Single-stage LED driver power supply with high power factor | |
| CN102781147B (en) | LED (Light-emitting diode) power supply circuit with high power factor | |
| CN204697353U (en) | There is the compact LED drive circuit improving input current power factor (PF) | |
| CN204482133U (en) | A kind of LED constant pressure and flow drive circuit | |
| CN102810986A (en) | Series topological light-emitting diode (LED) switching power circuit | |
| CN103298204B (en) | With the controllable silicon light modulation LED lamp driver of open-circuit-protection | |
| CN202841608U (en) | LED power supply circuit possessing high power factor | |
| CN204761780U (en) | LED drive circuit with harmonic improves function | |
| CN204967611U (en) | Compound high -efficient power factor correction circuit | |
| CN203537222U (en) | Bootstrapping power supply MOSFET/IGBT driver circuit having high negative voltage | |
| CN203279247U (en) | Flicker-free LED drive power with high power factor | |
| CN202005010U (en) | Practical LED energy saving lamp | |
| CN202750305U (en) | LED spotlight with dimming function | |
| CN205124090U (en) | A high power factor regulator circuit for passive LED drive circuit | |
| CN206640832U (en) | A kind of control circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151014 |
|
| WD01 | Invention patent application deemed withdrawn after publication |