CIRCUIT AND METHOD FOR THE OPERATION OF AN LED STRING SUPPLIED WITH ALTERNATING VOLTAGE

CIRCUIT AND METHOD FOR THE OPERATION OF AN LED STRING SUPPLIED WITH ALTERNATING VOLTAGE

A circuit arrangement for operating a chain comprising at least one light emitting diode on an AC voltage, in particular mains voltage, comprising a rectifier with an input circuit for drawing the AC voltage and an output circuit, into which a rectified AC voltage is output. An energy store is provi...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: MAIWALD, Hubert, KRAUS, Robert
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
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Beschreibung
Zusammenfassung:A circuit arrangement for operating a chain comprising at least one light emitting diode on an AC voltage, in particular mains voltage, comprising a rectifier with an input circuit for drawing the AC voltage and an output circuit, into which a rectified AC voltage is output. An energy store is provided in the output circuit, in particular a storage capacitor, to which the LED chain can be connected in a parallel circuit. A current controller interrupts, during operation, the charging of the storage capacitor each time the current in the output circuit has risen to a specific threshold current, and enables charging again when the voltage in the output circuit has then fallen to a specific threshold voltage.