DC voltage converter e.g. for lamp drive device, includes series resonance circuit operated at constant frequency via inverter

摘要

A DC voltage converter (1) is supplied with a rectified mains voltage (2) and generates a controlled DC voltage and comprises an inverter (4), a series resonance circuit (5), which is driven with a mainly constant frequency in the region of its resonance frequency by the inverter, and a rectifier (6) for the AC voltage present at the series resonance circuit for generating a rectified output voltage. An Independent claim is given for an electronic ballast for operating a lamp.