This document describes a high-efficiency, high power factor, low THD and digital dimming electronic ballast designed to drive 2X36 W T8 tube lamps.
The document details the design of a high-frequency electronic ballast capable of driving two 36 W T8 tube lamps with a total power of up to 72 W. The system features an active power factor correction (PFC) circuit based on the L6562 and a half-bridge inverter controlled by the L6574. It includes digital dimming capabilities ranging from 5% to 100% via an ST7FDALI microcontroller.
The system supports a maximum lamp power of 72 W.
The digital dimming range is from 5% to 100%.
The warm start time is less than 1.5 seconds.