Ballast for high pressure gas discharge lamp in motor vehicle, has transformer with primary coil and secondary coil designed as wire winding, where halves of primary coil are made of conductor areas arranged on board layer

摘要

The ballast has a push-pull-inverter comprising a transformer (Tr1) with a primary coil and a secondary coil. A series connector comprising capacitors (C1, C2) and an inductor (L1), is connected between a tap of the secondary coil and a connector of an output of the ballast, where the secondary coil is designed as a wire winding or a cord winding. The capacitor (C2) is connected parallel to an output. Halves of the primary coils are made of multiple conductor areas, which are arranged in or on a layer of a printed circuit board.