Cs. Lin et Cl. Chen, SINGLE-SWITCH SOFT-SWITCHING ELECTRONIC BALLAST WITH HIGH INPUT POWER-FACTOR, IEE proceedings. Electric power applications, 145(4), 1998, pp. 345-350
Design and analysis of a new single-switch soft-switching class-E elec
tronic ballast with high input power factor is presented. Design equat
ions for the optimum operating condition are derived and complete comp
uter analysis performed. It is shown that low duty-cycle control of th
e class-E ballast can reduce the voltage stress of the controlled swit
ch. A 40-W fluorescent lamp ballast is implemented and experimental re
cordings verify the analytical results.