Lamp controller with lamp status detection and safety circuitry

作者： Sreeraman Venkitasubrahmanian , Yongping Xia , Paul Leyten , Raj Jayaraman

DOI:

关键词: Controller (computing) 、 Shut down 、 Electromagnetic coil 、 Output transformer 、 Power (physics) 、 Electrical engineering 、 Engineering 、 Voltage 、 Ballast 、 Capacitive sensing

摘要: A ballast includes safety circuitry which senses lamp status through various phases of operation. According to one feature, the is prevented from supplying an output voltage upon initial energization when a not present at terminals. The presence filament sensed via DC path extending heater windings transformer. When complete, control input, for example power supply input controller, provided with start also used restart if defective replaced good one. Over-voltage and capacitive mode detection disclosed shut down failure/removal.