1. Introduction
Utilization of voltage-fed quasi-resonant half-bridge inverters
as AC sources is popular in a variety of applications,
including electronic ballasts [1–7]. These electronic ballasts help
to improve lumen maintenance, eliminate flicker, lamp power
control, light color and increase lifetime, thereby realizing highefficiency
lamp power control.
In order to obtain compact electronic ballast, the operating
frequency must be raised. However, at high frequency, soft
commutation techniques are recommended to maintain high
efficiency [2]. More studies are done to refine the circuit structure,
in order to improve the ballast performances and reduce
the circuit losses [3–5]. Hence, the study presented in this
paper proposes a novel improved topology of a voltage-fed