DE102005023502B3 - Circuit arrangement for current supply of light emitting diodes and/or light emitting diode chains, has inductor connected with light emitting diodes and/or light emitting diode chains that are antiparallelly switched - Google Patents
Circuit arrangement for current supply of light emitting diodes and/or light emitting diode chains, has inductor connected with light emitting diodes and/or light emitting diode chains that are antiparallelly switched Download PDFInfo
- Publication number
- DE102005023502B3 DE102005023502B3 DE102005023502A DE102005023502A DE102005023502B3 DE 102005023502 B3 DE102005023502 B3 DE 102005023502B3 DE 102005023502 A DE102005023502 A DE 102005023502A DE 102005023502 A DE102005023502 A DE 102005023502A DE 102005023502 B3 DE102005023502 B3 DE 102005023502B3
- Authority
- DE
- Germany
- Prior art keywords
- light
- emitting diode
- light emitting
- emitting diodes
- circuit arrangement
- 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.)
- Expired - Fee Related
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 7
- 238000004146 energy storage Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC
- H02M5/04—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters
- H02M5/22—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M5/275—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/293—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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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
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/375—Switched mode power supply [SMPS] using buck topology
-
- 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
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/39—Circuits containing inverter bridges
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
Die Erfindung betrifft eine Schaltungsanordnung zur Stromversorgung von Leuchtdioden (D1, D2) bzw. Leuchtdiodenketten aus einem Wechselstromnetz. Eine derartige Schaltungsanordnung mit erhöhtem Wirkungsgrad und wesentlich höherer Lebensdauer als Schaltnetzteilschaltungen mit Brückengleichrichter und Ladekondensatoren ist dadurch gekennzeichnet, dass eine Drossel (L1) vorgesehen ist, die mittels mindestens eines elektronischen Schalters (S1, S2) abwechselnd mit der positiven und der negativen Halbwelle des Wechselstroms beaufschlagbar ist und die mit den Leuchtdioden (D1, D2) bzw. Leuchtdiodenketten verbunden ist, wobei die Leuchtdioden (D1, D2) bzw. Leuchtdiodenketten antiparallel geschaltet sind.The The invention relates to a circuit arrangement for power supply of light-emitting diodes (D1, D2) or light-emitting diode chains from an alternating current network. Such a circuit arrangement with increased efficiency and essential higher Lifespan as switching power supply circuits with bridge rectifier and charging capacitors is characterized in that a throttle (L1) is provided, by means of at least one electronic switch (S1, S2) alternately can be acted upon by the positive and the negative half-wave of the alternating current is and with the light-emitting diodes (D1, D2) or LED chains is connected, wherein the light emitting diodes (D1, D2) or LED chains are connected in anti-parallel.
Description
Die Erfindung betrifft eine Schaltungsanordnung zur Stromversorgung von Leuchtdioden bzw. Leuchtdiodenketten aus einem Wechselstromnetz.The The invention relates to a circuit arrangement for power supply of light-emitting diodes or light-emitting diode chains from an AC network.
Bekannt für diese Anwendungen sind Schaltnetzteilschaltungen, die stets Brückengleichrichter zur Erzeugung einer Gleichspannung aufweisen. Zur Energiespeicherung werden Ladekondensatoren, insbesondere Elektrolytkondensatoren, eingesetzt, die sich negativ auf die Lebensdauer der Schaltung auswirken.Known for this Applications are switching power supply circuits, which are always bridge rectifier for Generating a DC voltage. For energy storage be charging capacitors, in particular electrolytic capacitors, used, which adversely affect the life of the circuit.
Bei
aus der
Aus
der
DC/AC
und AC/AC Resonanzwandler mit eingangsseitigem Gleichrichter für antiparallel
geschaltete Leuchtdioden sind aus der
Gemäß der
Für den Wechselstrombetrieb
antiparallel geschalteter Leuchtdioden ist aus der
Der Erfindung liegt die Aufgabe zugrunde, eine Schaltungsanordnung anzugeben, bei der auf Ladekondensatoren weitgehend verzichtet werden kann. Die Schaltung soll einen guten Wirkungsgrad aufweisen, wobei über einen weiten Bereich eine Steuerung der Lichtstärke durch Pulsweitenmodulation möglich sein soll. Beim Auftreten eines Fehlers soll mindestens ein Diodenzweig weiter betriebsfähig bleiben. Eine Regelbarkeit des Leistungsfaktors – PFC Power Factor Correction – wird angestrebt.Of the Invention is based on the object of specifying a circuit arrangement in the case of charging capacitors can be largely dispensed with. The circuit should have a good efficiency, with over a Wide range control of the light intensity by pulse width modulation possible should be. If an error occurs, at least one diode branch remain operational. A controllability of the power factor - PFC Power Factor Correction - is sought.
Die Aufgabe wird mit den Merkmalen des Anspruchs 1 gelöst. Da das Prinzip der Schaltung nicht auf die Netzgleichrichtung beruht und somit ein Brückengleichrichter entbehrlich ist, wird, insbesondere bei kleinen Spannungen, der Wirkungsgrad erhöht. Außerdem wird kein Ladekondensator benötigt, wodurch sich eine kleinere Einschaltverzögerung und eine wesentlich höhere Lebensdauer ergeben.The The object is achieved with the features of claim 1. Since that Principle of the circuit is not based on the mains rectification and thus a bridge rectifier is dispensable, especially at low voltages, the Increased efficiency. In addition, will no charging capacitor needed, resulting in a smaller turn-on delay and a significant higher Lifetime result.
Als Wirkprinzip wird das des Drossel-Abwärtswandlers verwendet. Dabei ist die Schaltung derart konzipiert, dass dieser Abwärtswandler in beiden Halbwellen der speisenden Wechselspannung arbeitet. Die Drossel wird abwechselnd mit positiven und negativen Strömen beaufschlagt und wirkt in beiden Fällen als Energiespeicher. Als Ausgangsstrom ergibt sich ein Wechselstrom mit der Frequenz der Eingangsspannung. Der Effekt der Überlagerung des Stromes mit der höherfrequenten Schaltfrequenz ist dabei gering. Die Last muss also ein Wechselstromverbraucher sein. Für die Stromversorgung von Leuchtdioden sind diese antiparallel geschaltet. Diese mit den Leuchtdioden beschalteten Ausgangszweige wirken jeweils abwechselnd als Belastung und als Rückschlagdiode – für den jeweils anderen Zweig. Außer Einzeldioden sind als Belastung auch Leuchtdiodenketten möglich. Bei einem Fehler bleibt mindestens eine Leuchtdiodenkette weiterhin funktionsfähig. Bei Bedarf sind sowohl eine Regelung des Leistungsfaktors als auch eine Steuerung der Lichtstärke durch Pulsweitenmodulation möglich.When Operating principle is that of the choke-down converter used. there the circuit is designed in such a way that this buck converter works in both half-waves of the feeding AC voltage. The Throttle is alternately applied with positive and negative currents and works in both cases as energy storage. The output current is an alternating current with the frequency of the input voltage. The effect of the overlay of the current with the higher frequency Switching frequency is low. The load must therefore be an AC consumer be. For the power supply of LEDs are connected in anti-parallel. These output branches connected to the light-emitting diodes act in each case alternately as a load and as a flyback diode - for each other branch. Except Single diodes are also possible as a burden LED chains. at an error remains at least one LED chain continues functioning. If required, both a regulation of the power factor and a control of the light intensity possible by pulse width modulation.
Schaltungsbeispiele sind in den abhängigen Ansprüchen gekennzeichnet und werden nachfolgend anhand figürlicher Darstellungen näher beschrieben. Es zeigen:circuit examples are characterized in the dependent claims and are described below with reference to figurative representations. Show it:
Gemäß
Bei
der in
Die
in
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005023502A DE102005023502B3 (en) | 2005-05-18 | 2005-05-18 | Circuit arrangement for current supply of light emitting diodes and/or light emitting diode chains, has inductor connected with light emitting diodes and/or light emitting diode chains that are antiparallelly switched |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005023502A DE102005023502B3 (en) | 2005-05-18 | 2005-05-18 | Circuit arrangement for current supply of light emitting diodes and/or light emitting diode chains, has inductor connected with light emitting diodes and/or light emitting diode chains that are antiparallelly switched |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE102005023502B3 true DE102005023502B3 (en) | 2006-12-21 |
Family
ID=37489815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE102005023502A Expired - Fee Related DE102005023502B3 (en) | 2005-05-18 | 2005-05-18 | Circuit arrangement for current supply of light emitting diodes and/or light emitting diode chains, has inductor connected with light emitting diodes and/or light emitting diode chains that are antiparallelly switched |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE102005023502B3 (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5500575A (en) * | 1993-10-27 | 1996-03-19 | Lighting Control, Inc. | Switchmode AC power controller |
| EP0905871A2 (en) * | 1997-09-25 | 1999-03-31 | Oy Helvar | A.C. to A.C. line frequency power converter |
| WO2001001385A1 (en) * | 1999-06-29 | 2001-01-04 | Welles Reymond | Ac powered led circuits for traffic signal displays |
| DE19732828C2 (en) * | 1997-07-30 | 2001-01-18 | Siemens Ag | Circuit arrangement for driving a light-emitting diode array |
| DE10013207A1 (en) * | 2000-03-17 | 2001-09-20 | Tridonic Bauelemente | Circuit for supplying voltage to and controlling operating characteristics of light emitting diode(s) has inverter with power switches with variable switching frequency for brightness control |
| US6388393B1 (en) * | 2000-03-16 | 2002-05-14 | Avionic Instruments Inc. | Ballasts for operating light emitting diodes in AC circuits |
| US6411045B1 (en) * | 2000-12-14 | 2002-06-25 | General Electric Company | Light emitting diode power supply |
| DE20220900U1 (en) * | 2002-11-07 | 2004-05-27 | Schmeling, Till, Dr.rer.nat. | LED-based navigation and position lights arrangement e.g. for ships and water craft and also for road signs, includes light and color sensors for automatically adjusting required color and light-intensity |
-
2005
- 2005-05-18 DE DE102005023502A patent/DE102005023502B3/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5500575A (en) * | 1993-10-27 | 1996-03-19 | Lighting Control, Inc. | Switchmode AC power controller |
| DE19732828C2 (en) * | 1997-07-30 | 2001-01-18 | Siemens Ag | Circuit arrangement for driving a light-emitting diode array |
| EP0905871A2 (en) * | 1997-09-25 | 1999-03-31 | Oy Helvar | A.C. to A.C. line frequency power converter |
| WO2001001385A1 (en) * | 1999-06-29 | 2001-01-04 | Welles Reymond | Ac powered led circuits for traffic signal displays |
| US6388393B1 (en) * | 2000-03-16 | 2002-05-14 | Avionic Instruments Inc. | Ballasts for operating light emitting diodes in AC circuits |
| DE10013207A1 (en) * | 2000-03-17 | 2001-09-20 | Tridonic Bauelemente | Circuit for supplying voltage to and controlling operating characteristics of light emitting diode(s) has inverter with power switches with variable switching frequency for brightness control |
| US6411045B1 (en) * | 2000-12-14 | 2002-06-25 | General Electric Company | Light emitting diode power supply |
| DE20220900U1 (en) * | 2002-11-07 | 2004-05-27 | Schmeling, Till, Dr.rer.nat. | LED-based navigation and position lights arrangement e.g. for ships and water craft and also for road signs, includes light and color sensors for automatically adjusting required color and light-intensity |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8100 | Publication of the examined application without publication of unexamined application | ||
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |