Ballast for at least one electric incandescent lamp

Details Ballast for at least one electric incandescent lamp Ballast for at least one electric incandescent lamp

H - Electricity

05

B

H05B 41/14 (2006.01) H05B 39/04 (2006.01) H05B 41/36 (2006.01)

Patent

CA 2403053

The present invention relates to a ballast for at least one electric incandescent lamp, having at least two switching elements (T1, T2) that are coupled to one another with the formation of a first tie point (VP1), a drive circuit (10) with at least one output for driving the at least two switching elements (T1, T2) with the aid of a drive signal that is characterized by a pulse duty factor (d) and an operating frequency (f s), and with an input for a dimming signal (U d), and a power transformer (~) whose primary side (L1) is coupled to the first tie point (VP1), it being possible to connect the at least one electric incandescent lamp (LA1; LA2) to the secondary side (L2) thereof, the drive circuit (10) being designed to vary the pulse duty factor (d) and the operating frequency (f s) of the drive signal as a function of the dimming signal (U d) . Furthermore the invention relates to a corresponding method.

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