CN103874263A - Novel LED drive power supply - Google Patents
Novel LED drive power supply Download PDFInfo
- Publication number
- CN103874263A CN103874263A CN201210527578.3A CN201210527578A CN103874263A CN 103874263 A CN103874263 A CN 103874263A CN 201210527578 A CN201210527578 A CN 201210527578A CN 103874263 A CN103874263 A CN 103874263A
- Authority
- CN
- China
- Prior art keywords
- voltage
- power supply
- constant
- driving power
- current
- 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
Images
Abstract
A novel LED drive power supply is characterized in that the power supply is composed of a rectifier bridge, a constant voltage control, and a constant current control. The novel power supply, with a simple circuit structure and a wide input voltage range, is cost-effective and simple, and can meet the requirements for a constant current and safety.
Description
Technical field
The present invention relates to a kind of New LED driving power, this power supply is reduced form design architecture, cost, and simple economy, is suitable for building and indoor illumination light fitting, has greatly improved cost performance and the competitiveness of LED lighting.
Background technology
LED light fixture is because it is energy-conservation, and environmental protection, efficient and excellent light source characteristic are widely applied in commercial lighting, building lighting and various special lighting.
Electric, the optical property of LED light fixture and life-span, driving power played a very important role except the performance of LED light source.Therefore along with the development of LED light fixture, LED driving power presents the trend of development in pluralism.
The preferred plan of LED drive circuit is can monitoring current and keep current constant, this class circuit is not affected by LED forward voltage negative temperature coefficient, the linear stabilized power supply of current widely used isolation that Here it is, Unisolated switch stabilized voltage power supply or band feedback, but its circuit complexity, cost are high, only be applied to the street lighting of High Light Output, and might not be preferred plan for building and room lighting.
Building and indoor illumination light fitting must be with 85 ~ 265VAC, work in the complete common voltage specification limit of 50 ~ 60Hz, can be applicable to adopting simple, economical and strong design of hybrid circuits, although its usefulness requires may be high unlike complicated switching power supply, reduced form design architecture and low cost are a kind of attractive selections.
The s main working parameters of LED is relatively simple, as long as keep current constant, and lower than the maximum current that can bear, within the scope of design parameter, work and do not bear excessive stresses, be that drive circuit meets LED specification, its light source output can remain constant, substantially can exceed 50,000 hours useful life.
Therefore can find a kind of economy, simple and can keep the driving power of the normal work of LED completely.
Summary of the invention
The present invention is a kind of novel LED driving power, and driving power is made up of rectifier bridge, constant voltage control and constant current control three parts, and constant voltage control is by voltage stabilizing didoe D
5, cut ripple triode Q
1with switch MOS pipe Q
2and peripheral circuit and components and parts composition, constant current control is by current regulator diode CCR and detect resistance R
4composition.
It has three features, and the one, circuit framework is brief, and the 2nd, simple, economy, cost performance are high, and it can meet the requirement of the constant current of LED driving power, safety, and the 3rd, wide input voltage range 85 ~ 265V.
Constant voltage control: AC power, through full-wave rectification, becomes single-phase sinuous pulsation electric current, and this electric current charges to energy storage capacitor.But this charging is controllable, in constant voltage unit, there is voltage divider, cut ripple control and switch control.The effect that cuts ripple control and switch control is that because discharge, electric charge reduces when energy storage capacitor, when voltage drop (Q=CU), switch closure, capacitor charging, in the time that energy storage capacitor reaches rated voltage (60 ~ 70V), cut-off switch stops charging again, and so forth to guarantee in the time that wide voltage is inputted, on energy storage capacitor, electric charge is constant, is also voltage constant (U=Q/C).
Constant current control: utilize current regulator diode motional impedance very large, the constant-current characteristics of constant output current guarantees LED constant current work in operating voltage range.
Therefore, this has just guaranteed that the constant current of LED, constant voltage drive.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention
Fig. 2 is circuit theory diagrams of the present invention
Embodiment
By Fig. 1, Fig. 2 is known, sine ac power supply, and through the rectifier bridge of diode D1 ~ D4, output sinuous pulsation electric current, and in resistance R
1, R
2upper generation sinuous pulsation voltage.Now triode Q of cause
1cut-off, metal-oxide-semiconductor Q
2u
gS>V
t(metal-oxide-semiconductor cut-in voltage) is therefore Q
2conducting, switch closure, this voltage is just to C
1charging.This voltage is at R in addition
1and R
2dividing potential drop on the voltage divider of composition, obtains one at P point and cuts ripple control voltage U
p.Work as U
prise to U
p>U
ztime (Uz is voltage-stabiliser tube D
5puncture voltage), Q
1conducting, metal-oxide-semiconductor Q
2u
gS=0, Q
2turn-off, switch disconnects, C
1charging stops, and by constant current tube CCR, LED string is discharged.When P point current potential drops to U
p<U
ztime, Q
1cut-off, metal-oxide-semiconductor U
gS>V
tconducting again, C
1charging.Circulation, guarantees in wide range input voltage capacitor C and so forth
1the electric charge that upper maintenance is stable, just like a constant pressure source.Current regulator diode CCR is again the constant current device that a kind of dynamic electric resistor is very large, and this device output current in operating voltage range is almost constant, makes LED current constant at rated value.
By selecting different U
zvoltage-stabiliser tube and the constant current tube of different constant current value Ireg, can make the voltage of LED string remain on 60 ~ 70V, current constant is at rated value.
Voltage-stabiliser tube D
6for the use of protection metal-oxide-semiconductor.Resistance R
4connect with LED, for measuring the electric current of LED string.
Be more than an example of the present invention, can not limit with this scope of the invention process, within the simple equivalence variation of having done according to description of the present invention and claim all belongs to the claims in the present invention scope with modification.
Claims (3)
1. a New LED driving power, is characterized in that: driving power is made up of rectifier bridge, constant voltage control and constant current control three parts.
2. a kind of New LED driving power according to claim 1 is characterized in that: described constant voltage control is by voltage stabilizing didoe D
5, cut ripple triode Q
1with switch MOS pipe Q
2and peripheral circuit and components and parts composition.
3. a kind of New LED driving power according to claim 1 is characterized in that: described constant current control is by current regulator diode CCR and detect resistance R
4composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210527578.3A CN103874263A (en) | 2012-12-10 | 2012-12-10 | Novel LED drive power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210527578.3A CN103874263A (en) | 2012-12-10 | 2012-12-10 | Novel LED drive power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103874263A true CN103874263A (en) | 2014-06-18 |
Family
ID=50912294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210527578.3A Pending CN103874263A (en) | 2012-12-10 | 2012-12-10 | Novel LED drive power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103874263A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108063437A (en) * | 2017-12-28 | 2018-05-22 | 广州爱易学智能信息科技有限公司 | The short-circuit protection circuit of classroom blackboard LED light strip |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201403223Y (en) * | 2009-05-08 | 2010-02-10 | 常州银河世纪微电子有限公司 | Constant current diode drive device |
| CN201550315U (en) * | 2009-11-26 | 2010-08-11 | 付会芬 | LED driving circuit |
| CN102510615A (en) * | 2011-10-25 | 2012-06-20 | 杭州鸿德照明科技有限公司 | Voltage-multiplying rectifying high-voltage power-supplying constant current driving circuit for serially connected LEDs (Light Emitting Diodes) |
| CN202435681U (en) * | 2012-01-09 | 2012-09-12 | 杭州鸿德照明科技有限公司 | Wide voltage input linear constant current LED (Light-Emitting Diode) driving circuit |
| CN203368809U (en) * | 2012-11-30 | 2013-12-25 | 江苏施诺照明有限公司 | Novel LED (Light-Emitting Diode) driving power supply |
-
2012
- 2012-12-10 CN CN201210527578.3A patent/CN103874263A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201403223Y (en) * | 2009-05-08 | 2010-02-10 | 常州银河世纪微电子有限公司 | Constant current diode drive device |
| CN201550315U (en) * | 2009-11-26 | 2010-08-11 | 付会芬 | LED driving circuit |
| CN102510615A (en) * | 2011-10-25 | 2012-06-20 | 杭州鸿德照明科技有限公司 | Voltage-multiplying rectifying high-voltage power-supplying constant current driving circuit for serially connected LEDs (Light Emitting Diodes) |
| CN202435681U (en) * | 2012-01-09 | 2012-09-12 | 杭州鸿德照明科技有限公司 | Wide voltage input linear constant current LED (Light-Emitting Diode) driving circuit |
| CN203368809U (en) * | 2012-11-30 | 2013-12-25 | 江苏施诺照明有限公司 | Novel LED (Light-Emitting Diode) driving power supply |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108063437A (en) * | 2017-12-28 | 2018-05-22 | 广州爱易学智能信息科技有限公司 | The short-circuit protection circuit of classroom blackboard LED light strip |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101657057B (en) | LED power circuit | |
| CN103179764B (en) | A kind of LED with self-adaptive driving circuit and self-adaptive driving circuit | |
| JP3167927U (en) | Constant current LED lamp | |
| CN108966430B (en) | Linear driving circuit of LED lighting lamp | |
| CN103152895B (en) | The circuit of the direct driving LED of a kind of alternating current | |
| CN102510605B (en) | Novel LED (light emitting diode) driving circuit and drive method | |
| CN203167384U (en) | AC directly driving LED lamp current control circuit | |
| CN201878375U (en) | LED (light-emitting diode) constant-voltage and constant-current driving circuit | |
| CN103648223A (en) | Multi-channel light-emitting diode (LED) linear driver | |
| CN203368809U (en) | Novel LED (Light-Emitting Diode) driving power supply | |
| CN203872387U (en) | Power off non-stroboscopic second gear dimmable LED driving power supply | |
| CN203504839U (en) | LED lamp driving power supply adopting primary detection and regulation | |
| CN203590567U (en) | AC power supply-based LED drive circuit with function of automatic illumination intensity adjusting | |
| CN103874263A (en) | Novel LED drive power supply | |
| CN202425167U (en) | Light emitting diode (LED) driver | |
| CN205883641U (en) | Linear constant current circuit who adjusted luminance in full stroke phase cut angle based on triac dimmer | |
| CN205546091U (en) | LED filament lamp dimmer circuit | |
| CN201429013Y (en) | LED emergency lighting lamp | |
| CN203340372U (en) | LED lamp driving power supply employing analog dimming | |
| CN204652709U (en) | The linear LED drive power of dividing potential drop rectification falls in non-polar condenser | |
| CN203368857U (en) | Flyback dimmable LED driving system | |
| CN106817806B (en) | A kind of controllable silicon light modulation gamut is without stroboscopic circuit | |
| CN202135359U (en) | LED energy saving lamp control circuit possessing over-voltage protection function | |
| CN202514132U (en) | LED dimming power supply | |
| CN204707313U (en) | A kind of LED protection 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 | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140618 |