CN103747567A - LED light source constant-current driving circuit - Google Patents
LED light source constant-current driving circuit Download PDFInfo
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- CN103747567A CN103747567A CN201310715890.XA CN201310715890A CN103747567A CN 103747567 A CN103747567 A CN 103747567A CN 201310715890 A CN201310715890 A CN 201310715890A CN 103747567 A CN103747567 A CN 103747567A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention discloses an LED light source constant-current driving circuit comprising a photovoltaic streetlight system controller. The output terminal of the photovoltaic streetlight system controller is connected with an anti-reversal connection circuit; the output terminal of the anti-reversal connection circuit is connected with a filtering circuit; the output terminal of the filtering circuit is connected with a power conversion circuit; and the output terminal of the power conversion circuit is connected with a shaping filtering circuit. A first output terminal of the shaping filtering circuit is connected with an LED light source assembly; a second output terminal is successively connected in series with a voltage sampling circuit and a voltage-stabilizing loop and then is connected to a PWM control unit; and a third output terminal is successively connected in series with a current sampling circuit and a constant-current loop and then is connected to a PWM control unit. The provided driving circuit has advantages of simple structure, less components, small integrated size, low heat, high efficiency and energy conservation, and high security and reliability.
Description
Technical field
The present invention relates to a kind of LED light source constant-current drive circuit.
Background technology
Along with the material of LED and the development of integrated technique technology, the power of LED light source is also in continuous increase, but the luminous intensity of great power LED is the operating current by LED to be determined, electric current is crossed conference and is caused serious heating, when working temperature surpasses 70 ℃, luminous intensity seriously decays, and electric current is too small, can not reach nominal luminous intensity.So forming the life-span of LED light source and the key of performance is the constant-current drive circuit of LED light source.
Summary of the invention
The defect that the present invention seeks to exist for prior art provides a kind of LED light source constant-current drive circuit.
The present invention for achieving the above object, adopt following technical scheme: a kind of LED light source constant-current drive circuit, comprise optical road lamp system controller, described optical road lamp system controller output is connected with reverse-connection preventing circuit, the output of described reverse-connection preventing circuit is connected with filter circuit, the output of described filter circuit is connected with power conversion circuit, and the output of described power conversion circuit is connected with current rectifying and wave filtering circuit; The first output of described current rectifying and wave filtering circuit is connected with LED light source assembly, its second output is connected to PWM control unit after being connected in series successively voltage sample circuit, voltage stabilizing loop, after its 3rd output is connected in series current sampling circuit, constant current loop successively, is connected to PWM control unit.
Beneficial effect of the present invention: driving circuit structure of the present invention is simple, and components and parts are few, and machine volume is little, generates heat little; There is energy-efficient, safe and reliable effect.
Accompanying drawing explanation
Fig. 1 schematic diagram of the function of the present invention.
Embodiment
Shown in Fig. 1, for a kind of LED light source constant-current drive circuit, comprise optical road lamp system controller 1, described optical road lamp system controller 1 output is connected with reverse-connection preventing circuit 2, the output of described reverse-connection preventing circuit 2 is connected with filter circuit 3, the output of described filter circuit 3 is connected with power conversion circuit 4, and the output of described power conversion circuit 4 is connected with current rectifying and wave filtering circuit 5; The first output of described current rectifying and wave filtering circuit 5 is connected with LED light source assembly 6, its second output is connected to PWM control unit 11 after being connected in series successively voltage sample circuit 7, voltage stabilizing loop 8, after its 3rd output is connected in series current sampling circuit 9, constant current loop 10 successively, is connected to PWM control unit 11.
The operating efficiency of circuit depends on input voltage, input voltage is higher, efficiency is higher, input voltage is low, decrease in efficiency, this be mainly input voltage when high and the voltage stabilizing pressure reduction of output little, and input voltage when low and the voltage stabilizing pressure reduction of output large, when its pressure reduction is large, the switching loss of the power transistor of chip internal increases.Use due to photovoltaic street lamp the electric discharge of plumbic acid battery time, groundwork is near 24V, therefore DC-DC voltage and power conversion efficiency that chip and inductance and fly-wheel diode form are higher, circuit can obtain higher efficiency in use.Another when input voltage changes, output voltage is constant, and loaded work piece electric current does not change with the variation of input voltage yet, has therefore realized the object of constant voltage and constant current.
Circuit design of the present invention is for the feature of lead acid accumulator power supply and the high-power LED light source illumination of photovoltaic street lamp, used monolithic DC-DC boost conversion great power LED special driving chip, made circuit simple, components and parts are few, machine volume is little, generates heat little.Separately when design; considered anti-input interference; adapt to the input reverse-connection protection occurring in change range of input voltage and use procedure; the safeguard measure such as output overloading and short circuit; and the total power and the half-power conversion that adopt for saves energy, and the electric stress of whole circuit element and thermal stress have all been adopted to design of Reducing Rating and consumption reduction design.This circuit design is applied in actual production, has reached simple and practical, energy-efficient, safe and reliable effect.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (1)
1. a LED light source constant-current drive circuit, it is characterized in that, comprise optical road lamp system controller, described optical road lamp system controller output is connected with reverse-connection preventing circuit, the output of described reverse-connection preventing circuit is connected with filter circuit, the output of described filter circuit is connected with power conversion circuit, and the output of described power conversion circuit is connected with current rectifying and wave filtering circuit; The first output of described current rectifying and wave filtering circuit is connected with LED light source assembly, its second output is connected to PWM control unit after being connected in series successively voltage sample circuit, voltage stabilizing loop, after its 3rd output is connected in series current sampling circuit, constant current loop successively, is connected to PWM control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310715890.XA CN103747567A (en) | 2013-12-23 | 2013-12-23 | LED light source constant-current driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310715890.XA CN103747567A (en) | 2013-12-23 | 2013-12-23 | LED light source constant-current driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103747567A true CN103747567A (en) | 2014-04-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310715890.XA Pending CN103747567A (en) | 2013-12-23 | 2013-12-23 | LED light source constant-current driving circuit |
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| Country | Link |
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| CN (1) | CN103747567A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016041121A1 (en) * | 2014-09-15 | 2016-03-24 | 深圳市聚作照明股份有限公司 | Led drive power supply |
| US10097108B2 (en) | 2014-12-16 | 2018-10-09 | Abb Schweiz Ag | Energy panel arrangement power dissipation |
| US10348094B2 (en) | 2015-01-28 | 2019-07-09 | Abb Schweiz Ag | Energy panel arrangement shutdown |
| US10404060B2 (en) | 2015-02-22 | 2019-09-03 | Abb Schweiz Ag | Photovoltaic string reverse polarity detection |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006114324A (en) * | 2004-10-14 | 2006-04-27 | Sony Corp | Light emitting element driving device and display device |
| CN201263227Y (en) * | 2008-09-09 | 2009-06-24 | 皇明太阳能集团有限公司 | LED constant-current driver with light modulation function |
| CN101801145A (en) * | 2010-04-23 | 2010-08-11 | 海洋王照明科技股份有限公司 | Led lamp control circuit and led lamp |
-
2013
- 2013-12-23 CN CN201310715890.XA patent/CN103747567A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006114324A (en) * | 2004-10-14 | 2006-04-27 | Sony Corp | Light emitting element driving device and display device |
| CN201263227Y (en) * | 2008-09-09 | 2009-06-24 | 皇明太阳能集团有限公司 | LED constant-current driver with light modulation function |
| CN101801145A (en) * | 2010-04-23 | 2010-08-11 | 海洋王照明科技股份有限公司 | Led lamp control circuit and led lamp |
Non-Patent Citations (1)
| Title |
|---|
| 黎艺华: ""LED光源恒流驱动电路设计"", 《柳州职业技术学院学报》, vol. 13, no. 3, 30 June 2013 (2013-06-30), pages 51 - 56 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016041121A1 (en) * | 2014-09-15 | 2016-03-24 | 深圳市聚作照明股份有限公司 | Led drive power supply |
| US10097108B2 (en) | 2014-12-16 | 2018-10-09 | Abb Schweiz Ag | Energy panel arrangement power dissipation |
| US10348094B2 (en) | 2015-01-28 | 2019-07-09 | Abb Schweiz Ag | Energy panel arrangement shutdown |
| US10404060B2 (en) | 2015-02-22 | 2019-09-03 | Abb Schweiz Ag | Photovoltaic string reverse polarity detection |
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Application publication date: 20140423 |