CN203368809U - Novel LED (Light-Emitting Diode) driving power supply - Google Patents
Novel LED (Light-Emitting Diode) driving power supply Download PDFInfo
- Publication number
- CN203368809U CN203368809U CN 201220652370 CN201220652370U CN203368809U CN 203368809 U CN203368809 U CN 203368809U CN 201220652370 CN201220652370 CN 201220652370 CN 201220652370 U CN201220652370 U CN 201220652370U CN 203368809 U CN203368809 U CN 203368809U
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- constant
- driving power
- voltage
- current
- controlled
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Abstract
The utility model relates to a novel LED driving power supply which is characterized by being composed of a rectifier bridge part, a constant-voltage control part and a constant-current control part. The novel power supply is characterized by being concise in circuit structure, economical and simple in performance and high in cost performance; being able to satisfy constant-current and safety requirements for the LED driving power supply; and being wide in the input voltage range.
Description
Technical field
The present invention relates to a kind of New LED driving power, this power supply is the reduced form design architecture, cost, and simple economy, be suitable for building and indoor illumination light fitting, greatly improved cost performance and the competitiveness of LED lighting.
Background technology
The 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, the LED driving power presents the trend of development in pluralism.
But the preferred plan of LED drive circuit is monitoring current and keeps 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 is complicated, cost is 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, work in the design parameter scope and do not bear excessive stresses, be that drive circuit meets the LED specification, its light source output can remain constant, and useful life can be over 50,000 hours basically.
Therefore can find a kind of economy, simple and can keep the driving power of LED normal operation fully.
Summary of the invention
The present invention is a kind of novel LED driving power, and driving power is controlled three parts by rectifier bridge, constant voltage control and constant current and formed, the rectifier bridge of full-wave rectification, and constant voltage is controlled and three parts of constant current control are that order is connected in series relation.Be that full-wave rectification output is connected to the input that constant voltage is controlled, and the output that constant voltage is controlled is connected to the constant current control inputs, the constant current constant voltage that finally forms the LED lamp drives.As can be seen from Fig. 1, the constant voltage control section is actually by dividing potential drop, cut that ripple is controlled and switch is controlled and dynamically controlled energy storage capacitor and discharge and recharge, and guarantees the constant voltage constant that makes of its electric charge.The constant current part is that the current regulator diode very large with motional impedance keeps constant-current characteristics.Constant voltage is controlled 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 is controlled by current regulator diode CCR and is detected resistance R
4form.
It has three characteristics, 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, the 3rd, wide input voltage range 85～265V.
Constant voltage is controlled: 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, voltage divider is arranged in the constant voltage unit, cut ripple control and switch control.Cutting the effect that ripple is controlled and switch is controlled is that because of electric discharge, electric charge reduces when energy storage capacitor, during voltage drop (Q=CU), switch closure, capacitor charging, when energy storage capacitor reaches rated voltage (60～70V), cut-off switch stops charging again, and so forth to guarantee when wide voltage is inputted, on energy storage capacitor, electric charge is constant, is also voltage constant (U=Q/C).
Constant current is controlled: utilize the current regulator diode motional impedance very large, in operating voltage range, the constant-current characteristics of constant output current guarantees LED constant current work.
Therefore, this has just guaranteed that the constant current of LED, constant voltage drive.
The 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.Therefore triode Q the time
1cut-off, metal-oxide-semiconductor Q
2u
gSv
t(metal-oxide-semiconductor cut-in voltage) is therefore Q
2conducting, the 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 formed, obtain one at the P point and cut ripple control voltage U
p.Work as U
prise to U
pu
zthe time (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, the LED string is discharged.When P point current potential drops to U
p<U
zthe time, Q
1cut-off, metal-oxide-semiconductor U
gSv
tconducting again, C
1charging.Circulation, guarantee 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 the 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
6use for the protection metal-oxide-semiconductor.Resistance R
4with LED, connect, 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, it is characterized in that: driving power is controlled three parts by rectifier bridge, constant voltage control and constant current and is formed, full-wave rectification output is connected to the input that constant voltage is controlled, and the output that constant voltage is controlled is connected to the constant current control inputs, and the constant current constant voltage that finally forms the LED lamp drives.
2. a kind of New LED driving power according to claim 1 is characterized in that: described constant voltage is controlled 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 is controlled by current regulator diode CCR and is detected resistance R
4form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220652370 CN203368809U (en) | 2012-11-30 | 2012-11-30 | Novel LED (Light-Emitting Diode) driving power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220652370 CN203368809U (en) | 2012-11-30 | 2012-11-30 | Novel LED (Light-Emitting Diode) driving power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203368809U true CN203368809U (en) | 2013-12-25 |
Family
ID=49816517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220652370 Expired - Fee Related CN203368809U (en) | 2012-11-30 | 2012-11-30 | Novel LED (Light-Emitting Diode) driving power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203368809U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103874263A (en) * | 2012-12-10 | 2014-06-18 | 江苏施诺照明有限公司 | Novel LED drive power supply |
-
2012
- 2012-11-30 CN CN 201220652370 patent/CN203368809U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103874263A (en) * | 2012-12-10 | 2014-06-18 | 江苏施诺照明有限公司 | Novel LED drive power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131225 Termination date: 20151130 |
|
| EXPY | Termination of patent right or utility model |