UBA20272

www.DataSheet.co.kr UBA20271/2 350 V and 600 V Power ICs for dimmable compact fluorescent lamps Rev. 2.1 — 12 October 2011 Product data sheet 1. General description The UBA20271/2 are high-voltage power ICs intended to drive and control higher powered self ballasted Compact Fluorescent Lamp (CFL) lighting applications. The UBA20271/2 operate from 120 V and 230 V. The module includes a half-bridge power circuit of two NMOST power FETs. In addition, a controller circuit is included that has advanced features for dimming and a lamp current controlled boost feature. The boost feature is used for boosting cold (amalgam) CFL. The controller contains a half-bridge drive function for CFL, a high-voltage level-shift circuit with integrated bootstrap diode. In addition, the controller contains an oscillator function, a current control function both for preheat and burn, a timer function and protection circuits. The UBA20271/2 are supplied via a dV/dt current charge supply circuit from the half-bridge circuit. Remark: Mains voltages noted are AC. 2. Features and benefits 2.1 Half-bridge features  UBA20271: Two internal 350 V, 1.0  max 5.0 A NMOST half-bridge power FETs  UBA20272: Two internal 600 V, 3.0 , max 2.7 A NMOST half-bridge power FETs  Integrated high-voltage level-shift function with integrated bootstrap diode 2.2 Preheat and ignition features      Coil saturation protection during ignition Adjustable saturation protection level Adjustable preheat time Adjustabl...