Development of the back-boost inverter suitable for compact lamp

The new circuit of the electronic ballast for the compact fluorescent lamp, which is based on the back-boost converter, is proposed. The electronic ballast for compact fluorescent lamp does not need to satisfy the IEC standard Class C, and the regulation is looser than it. However, it is important to reduce the harmonics of input current, because the compact fluorescent lamp seems to be used widely in future. From analyses of circuit operations and experimental results, it is shown that the proposed circuit is effective for reduction of harmonics of input-current and also effective for improvement of input power factor.