Ballast circuit for fluorescent lamp

摘要

A ballast circuit for a fluorescent lamp for starting the fluorescent lamp and a compact fluorescent lamp is provided. The ballast circuit adopts a bypass capacitor which bypasses a high frequency and high harmonics to a smoothing portion for compensating a recovery characteristic of a rectification diode which causes a problem by feeding back high frequency currents (most of them are IL) which flow during the ignition of a lamp to a power source input, and including a high frequency component much included in a rectifying and smoothing operation. Thus, a power factor increases 95% or more.