The study of electronic ballast for fluorescent lamp with an electronic device given two functions

The typical electronic ballast for the fluorescent lamp uses a half-bridge inverter and a boost DC-DC converter. The latter on the input side of the former also works as a power factor correction (PFC) circuit. Since a half-bridge inverter and a boost converter work independently in this ballast, each circuit needs a switching element and a control unit respectively. The electronic ballast proposed in this paper consists of an electronic circuit with two functions. That is, a switching element in the buck-boost converter works as a switching device in the half-bridge inverter too. Then, this combined circuit can be used effectively as the electronic high-frequency ballast for fluorescent lamps.