Patent ID: 7120003
Filing Date: 2006-10-10
Classification: H02M,Y02B

Abstract:
1. Circuit arrangement having a mains connection, a mains switch with a first switching contact and a second switching contact, a demagnetization coil and a switch-mode power supply, comprising: a driver circuit; a transformer with a primary winding and an auxiliary winding, said auxiliary winding providing a supply voltage for said driver circuit; a switching transistor coupled in series with said primary winding and said driver circuit producing a control voltage for said switching transistor; a bridge rectifier for rectifying a mains voltage provided by said mains connection; and an energy storage capacitor coupled between said bridge rectifier and said primary winding; said circuit arrangement comprising further a power factor coil for power factor correction, which is arranged between said mains connection and said bridge rectifier, wherein said first switching contact is arranged between said mains connection and said demagnetization coil for switching said demagnetization coil on and off, and said second switching contact is arranged between said auxiliary winding and said drive circuit for switching off said supply voltage.