A high-power-factor electronic ballast using a flyback push-pullintegrated converter
Prado, R.N.D.; Bonafldo, S.A.
Industrial Electronics, IEEE Transactions on
Volume 46, Issue 4, Aug 1999 Page(s):796 - 802
Digital Object Identifier   10.1109/41.778245
Summary:This paper describes a high-power-factor electronic ballast for fluorescent lamps. The converter offers a high power factor and a high-frequency supply to the lamp using a single switch. In spite of its simplicity, an excellent performance concerning load and supply is achieved, ensuring a sinusoidal and in-phase supply current. High power factor is achieved by using a flyback converter operating in discontinuous conduction mode. Operating principle, design equations, component stress, and efficiency are presented. Experimental results have been obtained for one 40-W fluorescent lamp operating at 50-kHz switching frequency and 220-V line voltage

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