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 protections.

FEATUREs
■ Two internal 600 V, 3 Ω max MOST half bridge powers.
■ 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.