LED driver and driving method thereof

An LED driver and a driving method thereof include at least two sub-LED drivers connected in series between two terminals of an AC power source. The at least two sub-LED drivers have a common configuration. Each sub-LED driver includes a switch circuit having a first reference ground, an inductor ha...

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Bibliographische Detailangaben
Hauptverfasser:	Lin, Shengdie, Liu, Yang
Format:	Patent
Sprache:	eng
Schlagworte:	ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY
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Beschreibung
Zusammenfassung:	An LED driver and a driving method thereof include at least two sub-LED drivers connected in series between two terminals of an AC power source. The at least two sub-LED drivers have a common configuration. Each sub-LED driver includes a switch circuit having a first reference ground, an inductor having a first terminal connected to the first reference ground and a first capacitor. The first capacitor has a first terminal connected to a second terminal of the inductor and a second terminal connected to a second reference ground. A load with at least one LED to be driven is connected between the first terminal and the second terminal of the first capacitor. An inductance value of the inductor is designed such that each sub-driver operates in an open loop mode. The LED driver and the driving method thereof can achieve an output current balance between the respective sub-LED drivers.