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US 2003/0155872 A1Published application
Operating device for lamps with a regulated SEPIC converter
AssigneePatent-Treuhand-Gesellschaft Fur Elektrisch Gluhlampen Mbh
InventorMichael Weirich
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Abstract
The invention relates to a novel operating device for lamps, in particular low-pressure gas discharge lamps, in which a SEPIC converter is used for charging a storage transistor from an AC voltage supply. In this case, the SEPIC converter is regulated to an output quantity as regulated variable, its operating frequency being altered. Preferably, only the switch-on time and not the switch-off time of the switching transistor of the SEPIC converter is altered in this case.
Claims10
Electronic operating device for lamps, which is designed for supply with AC voltage and has:
- a storage capacitor (C2),
- a SEPIC converter (L1, L2, C1, T1, D1) for charging the storage capacitor (C2) from the AC voltage to a DC voltage in the case of an operating device current consumption which is essentially tracked to the AC voltage waveform with an operating frequency, and
- a regulating circuit (RS) for regulating the SEPIC converter to an output quantity,
- characterized in that the regulating circuit (RS) alters the operating frequency of the SEPIC converter (L1, L2, C1, T1, D1) during regulation.
1 more element
Dependencies are inferred from the claim text.