Modern personal computers, notebooks and televisions are characterized by higher intelligence and performance. At the same time, legal guidelines and industrial environmental standards ensure energy-saving techniques in chips, operating modes and also in power supplies and AC adapters. With the QR power supplies, Quasi-Sqare-Wave Resonant (QR), there are switching power supplies that combine a flyback converter with the power factor correction (LFK), Power Fact or Correction (PFC), have a high switching efficiency and cause low electromagnetic interference.
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|Englisch:||quasi-sqare-wave resonant - QR|