Abstract

AGUILAR-CASTILLO, C.; GARCIA-BELTRAN, C.D.  and  MORCILLO-HERRERA, C.. Digitally Controlled Integrated Electronic Ballast with Dimming and Power Factor Correction Features. J. appl. res. technol [online]. 2010, vol.8, n.3, pp.295-308. ISSN 2448-6736.

This paper presents a digitally controlled integrated electronic ballast with dimming and power factor correction features. The control circuit is based on a low-cost PIC16C71 microcontroller where the different strategies for energy saving have been implemented. The ballast is operating in closed loop achieving tight lamp current regulation through a digital Proportional-Integral algorithm. The integrated power stage is based on a frequency-controlled single-switch boost rectifier plus a half-bridge series resonant parallel loaded inverter sharing one power switch. The single-switch boost rectifier works in discontinuous inductor current mode with automatic power factor correction. Detailed analysis of the power stages and experimental results using 42-watt electronic ballast are presented.

Keywords : Electronic ballast; lighting control; active power factor correction; digital control.