Supply voltage disconnection method e.g. for gas discharge lamp or dimmer, has monitoring voltage source switched to current source at current threshold after load switching in for providing disconnection signal

摘要

The disconnection method uses a monitoring voltage source providing a DC voltage for detection of the switching in of a load, which switches over to a current source upon reaching a defined threshold current, .e.g. of between 1 mA and 20 mA, with a further increase in the current used for providing a switching signal for disconnection of the load.