Flyback converter as led driver

H - Electricity – 05 – B

Patent

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Details

H05B 33/08 (2006.01)

Patent

CA 2343062

The invention relates to a circuit arrangement for operating a semiconductor light source, comprising input terminals for connecting a supply voltage, input filter means, a converter provided with a switching element having a control circuit, and provided with inductive means, and output terminals for connecting the semiconductor light source. The switching element is periodically driven into conduction for a period ton. According to the invention, the converter is formed by a flyback converter, and the inductive means are formed by a transformer, and the control circuit controls the ton.

L'invention concerne un agencement de circuit destiné à commander une source de lumière à semi-conducteur comprenant des bornes d'entrée destinées à connecter une tension d'alimentation, un moyen de filtrage d'entrée, un convertisseur doté d'un élément de commutation ayant un circuit de commande, et doté d'un moyen inductif, et des bornes de sortie destinées à connecter la source de lumière à semi-conducteur. L'élément de commutation est commandé périodiquement en conduction pendant une période t¿marche?. Selon l'invention, le convertisseur est formé par un convertisseur indirect et les moyens inductifs sont formés par un transformateur, le circuit de commande commandant la t¿marche?.

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