CN106102238A - A kind of circuit being applicable to multipath LED constant current driving - Google Patents
A kind of circuit being applicable to multipath LED constant current driving Download PDFInfo
- Publication number
- CN106102238A CN106102238A CN201610524719.4A CN201610524719A CN106102238A CN 106102238 A CN106102238 A CN 106102238A CN 201610524719 A CN201610524719 A CN 201610524719A CN 106102238 A CN106102238 A CN 106102238A
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- circuit
- constant
- current
- led
- constant current
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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
A kind of circuit being applicable to multipath LED constant current driving, it is characterised in that: include a single output constant current source, multichannel DC/DC constant-current circuit and the load being made up of multi-way LED lamp；Described each DC/DC constant-current circuit includes a DC/DC translation circuit, one constant-current drive circuit and a PWM signal generator, and a DC/DC constant-current circuit band one paths of LEDs load, described single output constant current source input termination AC-input voltage, output termination multichannel DC/DC constant-current circuit.Multi-path LED load voltage close to time, multichannel DC/DC flow equalizing circuit is all operated in high efficiency state, and then can effectively reduce cost and the volume of multichannel DC/DC changer.The main circuit controlled by the constant-current drive circuit multiple constant current of the present invention and control circuit simple in construction, low cost.Multichannel constant-current control circuit, independent of single output constant current source, can be independently operated, the single channel constant current source rear class multiple constant current control being applicable to standard as module.
Description
Technical field
The present invention relates to circuit field, a kind of circuit being applicable to multipath LED constant current driving.
Background technology
Along with developing rapidly of illuminating industry, requiring more and more higher to the security performance of illumination, electric lighting belongs to country
Force safety certification product.
According to the present situation of current illuminating industry, the technology that enterprise to find new profit growth point to be necessary for setting up oneself is ground
Sending out mechanism, enhance the capability of independent innovation, effort exploitation new technique, new illuminating product squeeze into domestic and international middle and high level market.One side
Face, strengthens working in concert with the world.World's lighting industry has had the history of several more than ten years, have accumulated countless maturation technology and
Managerial experiences, if we introduce and digest and assimilate external advanced technology, management mode and abundant vehicle and strengthen and state
Working in concert of Ji Shang industries, universities and research institutors every aspect, so realize integrated innovation progressively make China illumination independent brand.
On the other hand, the national project of Key of Implementation lighting engineering, change pillar industry and lack the pillar sky of core technology
Heart present situation, and the statutory standard of oneself is proposed.Finally, country sets up special project for lighting engineering in plan of science and technology, supports enterprise
The self-built study base of industry also gives supporting or building industries, universities and research institutors base jointly with the mechanism such as university, institute of human, financial, and material resources.
Although China's illumination technique and equipment development have had suitable development, the maximization of luminaire and localization also by
Step maturation, but the general technical level of China's illumination still suffers from certain gap compared with abroad.
Currently, Lighting Industry development urgent need solves the technical problem that it is stable, and energy-conservation, simple, consumption reduction, environmental protection, improvement are whole
Weight and raising labour productivity, walks the road of sustainable development.
Summary of the invention
The technical problem that present invention mainly solves is that providing a kind of is applicable to the circuit that multipath LED constant current drives.
The present invention solves that the technical scheme that above-mentioned technical problem uses is:
A kind of circuit being applicable to multipath LED constant current driving, described circuit includes a constant-current source, multichannel DC/DC circuit
And LED multi-path；Described DC/DC constant-current circuit includes DC/DC translation circuit, constant-current drive circuit and PWM signal generator,
Described DC/DC constant-current circuit is connected with LED, described Constant current input termination AC-input voltage, output termination multichannel DC/DC electricity
Road；Described DC/DC translation circuit, it is achieved constant-current source output voltage Vo is to the conversion of LED voltage, and its switching device accepts PWM letter
The control of number generator；Described DC/DC translation circuit is BUCK, BOOST or BUCK-BOOST；Described DC/DC translation circuit is opened up
Flutter as Buck circuit, including switching tube S1, diode D1, inductance L1With sampling resistor Rs, described diode D1Negative electrode connect straight
Stream voltage VoAnode and one end of sampling resistor Rs, diode D1Anode meet switching tube S1Drain electrode and inductance L1One end,
Switching tube S1Source electrode meet DC voltage VoNegative terminal, inductance L1Another termination LED, sampling resistor Rs another termination LED just
End；Described constant-current drive circuit includes high-side current sample circuit, integrated transporting discharging IC1, resistance R1With resistance R2, electric capacity C1, direct current
Power Vcc.
Further, described PWM signal generator, the modulated signal of its input uses hardware to realize.
Further, described PWM signal generator, the modulated signal of its input is triangular wave.
The invention have the benefit that
LED multi-path voltage close to time, multichannel DC/DC flow equalizing circuit is all operated in high efficiency state, and then can be effective
Reduce cost and the volume of multichannel DC/DC changer.
The main circuit controlled by the constant-current drive circuit multiple constant current of the present invention and control circuit simple in construction, cost
Low.Multichannel constant-current control circuit is independent of constant-current source, can be independently operated, the single channel constant current source being applicable to standard as module after
Level multiple constant current controls.When prime single channel constant-current source needs to change current stabilization value because of light modulation, multiple-channel output constant-current control circuit is still
Every road electric current can be kept automatically to divide equally.
The present invention is by configuring some grades of non-isolation DCs/DC changer, and every paths of LEDs is realized by single DC/DC changer
Constant-current driving controls.
Accompanying drawing explanation
Fig. 1 is the circuit structure block diagram in a kind of detailed description of the invention of the present invention.
Fig. 2 is the DC/DC flow equalizing circuit figure of a kind of detailed description of the invention of the present invention.
Detailed description of the invention
The present invention is further elaborated below in conjunction with the accompanying drawings.
Please refer to Fig. 1 and Fig. 2.
The present invention is a kind of is applicable to the circuit that multi-channel LED current equalization controls, including a constant-current source, multichannel DC/DC current-sharing electricity
Road and the load being made up of multiple LED；Described DC/DC flow equalizing circuit includes a DC/DC translation circuit, a current-sharing control
Circuit processed and a PWM signal generator.Described DC/DC changer can be that BUCK, BOOST, BUCK-BOOST etc. are all kinds of
DC/DC translation circuit；The sampling of this road electric current is believed by the input of described every way equalizing control circuit from every road sampling resistor
Number, after respective equalizing control circuit is changed, become public connecting line, and other each road links together, and becomes current-sharing
Bus；After every road current sampling signal and current-sharing bus voltage compare regulation inside equalizing control circuit, produce PWM letter
Number or level signal control the operative duty cycles size of corresponding DC/DC changer, thus control the size of every road electric current, it is achieved
The current-sharing of each road electric current.
A kind of a kind of implementation being applicable to the DC/DC flow equalizing circuit that multi-channel LED current equalization controls, Vo is prime constant-current source
Output voltage, Io is that it exports electric current, and described DC/DC translation circuit topology is Buck circuit, including switching tube S1, diode
D1, inductance L1 and sampling resistor Rs, the anode of the DC voltage Vo that the negative electrode of described diode D1 connects and sampling resistor Rs's
One end, the anode of diode D1 connects drain electrode and one end of inductance L1 of switching tube S1, and the source electrode of switching tube S1 meets DC voltage Vo
Negative terminal, inductance L1 another termination LED negative terminal, sampling resistor Rs another termination LED anode；Described equalizing control circuit
Including high-side current sample circuit, integrated transporting discharging IC1, resistance R1 and resistance R2, electric capacity C1, DC source Vcc, described is high-end
The voltage that input is resistance Rs two ends of current sampling circuit, its one end exporting connecting resistance R1 and integrated transporting discharging IC1's is reverse
Input, another termination positive input of integrated transporting discharging IC1 of resistance R1, one end of resistance R2, one end of electric capacity C1 and all
Stream bus, another termination DC voltage Vo negative terminal of another termination the DC source Vcc, electric capacity C1 of resistance R2；Described PWM letter
Number generator includes that comparator IC2 and triangular signal, described triangular signal meet the reverse input end of comparator IC2, institute
The positive input stating comparator IC2 connects the outfan of integrated transporting discharging IC1, the output termination switching tube S1 of described comparator IC2
Gate pole.
Claims (3)
1. one kind is applicable to the circuit that multipath LED constant current drives, it is characterised in that: described circuit includes constant-current source, a multichannel
DC/DC circuit and LED multi-path；Described DC/DC constant-current circuit includes DC/DC translation circuit, constant-current drive circuit and PWM letter
Number generator, described DC/DC constant-current circuit is connected with LED, and described Constant current input termination AC-input voltage, output termination is many
Road DC/DC circuit；Described DC/DC translation circuit, it is achieved constant-current source output voltage Vo to the conversion of LED voltage, its switching device
Accept the control of PWM signal generator；Described DC/DC translation circuit is BUCK, BOOST or BUCK-BOOST；Described DC/DC becomes
Changing circuit topology is Buck circuit, including switching tube S1, diode D1, inductance L1With sampling resistor Rs, described diode D1The moon
The DC voltage V that pole connectsoAnode and one end of sampling resistor Rs, diode D1Anode meet switching tube S1Drain electrode and inductance
L1One end, switching tube S1Source electrode meet DC voltage VoNegative terminal, inductance L1Another termination LED, sampling resistor Rs another
Termination LED anode；Described constant-current drive circuit includes high-side current sample circuit, integrated transporting discharging IC1, resistance R1With resistance R2, electricity
Hold C1, DC source Vcc.
It is applicable to the circuit that multipath LED constant current drives the most as claimed in claim 1, it is characterised in that: described pwm signal occurs
Device, the modulated signal of its input uses hardware to realize.
It is applicable to the circuit that multipath LED constant current drives the most as claimed in claim 1, it is characterised in that: described pwm signal occurs
Device, the modulated signal of its input is triangular wave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610524719.4A CN106102238A (en) | 2016-07-01 | 2016-07-01 | A kind of circuit being applicable to multipath LED constant current driving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610524719.4A CN106102238A (en) | 2016-07-01 | 2016-07-01 | A kind of circuit being applicable to multipath LED constant current driving |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106102238A true CN106102238A (en) | 2016-11-09 |
Family
ID=57212277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610524719.4A Pending CN106102238A (en) | 2016-07-01 | 2016-07-01 | A kind of circuit being applicable to multipath LED constant current driving |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106102238A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106535403A (en) * | 2016-11-21 | 2017-03-22 | 佑图物理应用科技发展(武汉)有限公司 | Mixed-color dimmable curtain light and dimming method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102118905A (en) * | 2010-01-05 | 2011-07-06 | 英飞特电子（杭州）有限公司 | Circuit suitable for multi-path LED current-sharing control |
| US20130134893A1 (en) * | 2010-03-19 | 2013-05-30 | Tridonic Ag | Led Controller Comprising a Clocked Current Source |
| CN103503563A (en) * | 2011-05-06 | 2014-01-08 | 欧司朗有限公司 | Dimmable LED driver and method for controlling same |
-
2016
- 2016-07-01 CN CN201610524719.4A patent/CN106102238A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102118905A (en) * | 2010-01-05 | 2011-07-06 | 英飞特电子（杭州）有限公司 | Circuit suitable for multi-path LED current-sharing control |
| US20130134893A1 (en) * | 2010-03-19 | 2013-05-30 | Tridonic Ag | Led Controller Comprising a Clocked Current Source |
| CN103503563A (en) * | 2011-05-06 | 2014-01-08 | 欧司朗有限公司 | Dimmable LED driver and method for controlling same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106535403A (en) * | 2016-11-21 | 2017-03-22 | 佑图物理应用科技发展(武汉)有限公司 | Mixed-color dimmable curtain light and dimming method thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161109 |
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| RJ01 | Rejection of invention patent application after publication |