NXP USA Inc. UBA20271T/1,518

Description
The UBA20271/2 are high-voltage power ICs designed to drive and control higher-powered self-ballasted Compact Fluorescent Lamp (CFL) lighting applications. They operate from 120 V and 230 V and include a half-bridge power circuit of two NMOST power FETs, as well as a controller circuit with advanced features for dimming and a lamp current controlled boost feature. The boost feature is used for boosting cold (amalgam) CFLs.

Features

Half-Bridge Features:
UBA20271: Two internal 350 V, 1.0 Ω, max 5.0 A NMOST half-bridge power FETs
UBA20272: Two internal 600 V, 3.0 Ω, max 2.7 A NMOST half-bridge power FETs
Integrated high-voltage level-shift function with integrated bootstrap diode

Preheat and Ignition Features:
Coil saturation protection during ignition
Adjustable saturation protection level
Adjustable preheat time
Adjustable preheat current
Ignition lamp current detection

Lamp Boost Features:
Adjustable boost timing
Fixed boost current ratio of 1.5
Gradually boost to burn transition timing

Dim Features:
Continuously variable dimming function for standard phase cut dimmers

Applications
Higher-powered self-ballasted CFL lighting applications