DC adapter for fluorescent lamps has switch-on current limiter after mains rectifier, limiter acting as operating current regulating circuit, limits/regulates starting, operating currents/voltages

摘要

The DC adapter has a mains rectifier (1), a choke converter, a pole changer with a control circuit, an operating current limiter, an ignition circuit and a heating current circuit. A switch-on current limiter (2) is connected after the mains rectifier (1) and the limiter acts as an operating current regulating circuit. The adapter performs careful lamp ignition and limits or regulates the currents or voltages in the start and operating phases.