Patent ID: 8169149
Filing Date: 2012-05-01
Classification: H02M,H05B,Y10S

Abstract:
1. A circuit arrangement for the operation of at least one discharge lamp, the circuit arrangement comprising: an input for connecting an AC supply voltage; a rectifier, which is coupled to the input and has a first output terminal and a second output terminal for providing a DC supply voltage; an inverter, which comprises at least a first switch and a second switch, which are coupled in series between the first output terminal and the second output terminal of the rectifier; a control circuit which is at least designed to drive the first switch and the second switch, with a first input for receiving a control signal, and a second input for feeding a voltage for supplying the control circuit, the second input being connected to an operational supply apparatus, which is designed to couple an operational supply voltage to the second input of the control circuit during operation of the inverter; a control line, which is coupled firstly to the input for connecting an AC supply voltage and secondly to the first input for receiving a control signal, a third switch being arranged in the control line; wherein it furthermore comprises a startup supply apparatus with an input and an output, its input being coupled to the first input of the control circuit, and its output being coupled to the second input of the control circuit, the startup supply apparatus being designed to provide a startup supply voltage at the output of the startup supply apparatus in the event of an on signal at the input of the startup supply apparatus when the control circuit has no supply and therefore is switched off.