Novel Single-Stage Self-Oscillating Dimmable Electronic Ballast With High Power Factor Correction
Hsieh, J.-C.; Lin, J.-L.
Industrial Electronics, IEEE Transactions on
Volume PP, Issue 99, 0 Page(s):1 - 1
Digital Object Identifier   10.1109/TIE.2009.2017104
Summary:A novel self-oscillating electronic ballast with dimming capability and high power factor correction (PFC) is proposed in this paper. The single-stage electronic ballast integrates a buck-boost power factor correction stage with a half-bridge LCC series-parallel resonant inverter. The buck-boost semistage operating in discontinuous conduction mode (DCM) inherently has high power factor correction. The inverter is dimmable in self-oscillation mode, which is achieved using pulse-width modulation (PWM) and variable-frequency controls. The dimming circuit is simple and low-cost. The self-sustained oscillation of the dimmable electronic ballast for fluorescent lamps was verified using the dual-input describing function (DIDF) method. A prototype of a 10 W dimmable electronic ballast was implemented to verify the theoretical analysis.

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