Patent ID: 8369051

Claim:
A circuit arrangement for increasing the safety of an electronic operating device, comprising: mains input terminals, a mains input filter with X capacitors, which are connected in parallel with the mains input terminals, a rectifier part with a full-wave rectifier and a smoothing capacitor, which is connected between the output terminals of the full-wave rectifier, and a DC-DC voltage converter, which is connected to the output terminals of the rectifier part, wherein when the mains voltage is disconnected from the terminals, a load is switched on for a defined time span, the load and the time span being matched in such a way that the load consumes the residual energy which is stored in the capacitors, and thus lowers the voltage across the mains input terminals to a value which is unhazardous for humans within a very short period of time, and wherein the load is a DC-DC voltage converter transistor of the DC-DC voltage converter.