Abstract
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, excellent performance concerning load and supply is achieved, ensuring a sinusoidal and in-phase supply current high power factor is achieved by using a boost converter operating in discontinuous conduction mode. The high frequency supply of the lamp is given by a push-pull converter. Experimental results have been obtained for two 40 W fluorescent lamps operating at 50 kHz switching frequency and 110 V line voltage.
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