General description
The UBA2028 is a high voltage power IC that drives and controls electronically ballasted Compact Fluorescent Lamps (CFLs). The IC includes a Metal-Oxide-Semiconductor Transistor (MOST) half-bridge power circuit, a dimming function, a high voltage level shift circuit, an oscillator function, a lamp voltage monitor, a current control function, a timer function and various protections.

Features and benefits
■ Two internal 600 V, 3 Ω max MOST half-bridge power circuits
■ For steady state currents up to 280 mA
■ For ignition currents up to 1.5 A
■ Adjustable preheat time
■ Adjustable preheat current
■ Current controlled operating
■ Single ignition attempt
■ Adaptive non-overlap time control
■ Integrated high voltage level shift function
■ Power-down function
■ Protection against lamp failures or lamp removal
■ Capacitive mode protection

Applications
■ 5 W to 25 W dimmable CFLs, provided that the maximum junction temperature is not exceeded.