Circuit arrangement for providing a DC operating voltage

Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific voltage responsive fault sensor

Reexamination Certificate

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Reexamination Certificate

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08085519

ABSTRACT:
The invention relates to a circuit arrangement for providing an operating DC voltage from a mains voltage, more particularly to operating circuits comprising a clocked electronic converter. Such operating circuits are preferably used for lamps or other light sources. The present invention protects such circuit arrangements from transient mains overvoltages. As soon as a mains overvoltage occurs a diverter switch Th connects the voltage-sensitive switch S11of the electronic converter to a storage capacitor C12.

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patent: 6028755 (2000-02-01), Saeki et al.
patent: 6388397 (2002-05-01), Iwahori
patent: 7061190 (2006-06-01), Twardzik
patent: 7196479 (2007-03-01), Storm
patent: 7633275 (2009-12-01), Leyk et al.
patent: 40 37 722 (1991-11-01), None
patent: 1 526 622 (2005-04-01), None
Petersen et al., “Reduction of Voltage Stresses in Buck-Boost-Type Power Factor Correctors Operating in Boundary Conductor Mode,” APEC 2003 IEEE Appl. Power Elec. Conf., vol. 1, Conf. 18 pp. 664-670 (Feb. 9, 2003).

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