1.

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.

2.

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

3.

Applications

5 W to 25 W dimmable CFLs, provided that the maximum junction temperature is not

exceeded.

UBA2028

600 V dimmable power IC for compact fluorescent lamps

Rev. 02 — 19 July 2010

Product data sheet