Circuit arrangement

Details Circuit arrangement Circuit arrangement

H - Electricity

05

B

H05B 41/00 (2006.01) H05B 41/28 (2006.01) H05B 41/288 (2006.01) H05B 41/38 (2006.01)

Patent

CA 2207253

The invention relates to a circuit arrangement for igniting and operating a high-pressure discharge lamp, provided with a Buck converter connected to output terminals for lamp connection, capable of supplying the lamp through periodic switching of switching means which are held alternately in a conducting state for a period ton and in a non-conducting state for a period toff. According to the invention, the circuit arrangement comprises means for a fixed limitation of the time duration toff.

La présente invention concerne un montage de circuit servant à allumer et à faire fonctionner une lampe à décharge haute pression, équipé d'un convertisseur abaisseur de tension qui est relié à des bornes de sortie pour le branchement de la lampe, capable d'alimenter la lampe pendant la commutation périodique de moyens de commutation maintenus alternativement à l'état conducteur pendant une période t¿marche? et à l'état non conducteur pendant une période t¿arrêt?. Selon l'invention, le montage de circuit comprend un moyen de limitation fixe de la durée du temps t¿arrêt?.

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