Lighting device with high power factor for self-ballasted fluorescent lamp and low voltage

摘要

A parallel resonant circuit comprising a drive converter, a choke converter connected between the converters T1 and T2 of the drive converter, and a condenser connected between the choke converter and the converter T1, enables parallel resonance operation even at a low voltage. The transistors Q1 and Q2 of the switching inverter circuit do not generate heat, and stop the lighting device at the end of the lamp life and at no load, thereby eliminating the risk factor and preventing the loss of power. Lighting device.