Method and apparatus for a voltage controlled start-up circuit for an electronic ballast

摘要

A voltage control startup circuit for a lighting ballast includes first and second transistors (20), (22) for converting direct current from a voltage source (14) into alternating current to operate a lamp (10). The circuit includes an input portion for receiving a bus voltage signal, a resonant load portion for receiving a lamp load. The ballast also includes a start-up portion (24) that delays firing of the lamp based on the detected bus voltage.