Mains power part with primary side voltage reduction in standby operation has connection terminals for supplying voltage respectively to 1st capacitor, series circuit to transformer primary

摘要

The mains power part is provided with a circuit arrangement for the reduction of a primary voltage lying across the primary coil (L1) of a transformer (L1,L2). A second switch (T2) is connected in series to the first capacitor (C1). So that the second switch (T2) conducts or blocks according to a second control signal (STS). A control circuit (CON1,CON2) is provided for the preparation of a first control signal (AS).