AN2747 250瓦的HID金卤灯电子镇流器

AN2747 250瓦的HID金卤灯电子镇流器

AN2747
Application note

250 W HID metal halide electronic ballast

Introduction
This application note describes the two stages of electronic ballast for a 250 W HID metal
halide lamp. The ballast is composed of a boost converter (power factor controller PFC)
working in fixed OFF time and an inverter composed of a full bridge that drives the lamp at
low frequency square wave.
This design was realized thanks to the very large STMicroelectronics product portfolio. The
components include a PFC driver, half-bridge drivers, a microcontr