UBA20260

UBA20260 600 V driver IC for step dimmable CFLs Rev. 2 — 10 October 2011 Product data sheet 1. General description The UBA20260 is a high-voltage integrated circuit designed to control high power self-ballasted Compact Fluorescent Lamp (CFL) lighting applications. The UBA20260 is a controller circuit with advanced features for step dimming and a lamp current controlled boost feature for boosting cold (amalgam) CFLs. The controller contains a half-bridge drive function for CFLs, a high-voltage level-shift circuit with integrated bootstrap diode, an oscillator function, a current control function for preheat and burn, a timer function and protection circuits. The UBA20260 is supplied using the dV/dt current charge supply circuit from the half-bridge circuit. Remark: The mains voltages given in this data sheet are AC voltages. 2. Features and benefits 2.1 Half-bridge features  Integrated high-voltage level-shift function with integrated bootstrap diode 2.2 Preheat and ignition features  Coil saturation protection during ignition  Adjustable preheat time  Adjustable preheat current  Ignition lamp current detection 2.3 Lamp boost features  Adjustable boost timing  Fixed boost current ratio of 1.5  Gradually boost to burn transition timing NXP Semiconductors UBA20260 600 V driver IC for step dimmable CFLs 2.4 Dim features  4-level step dimming adjustment using a standard on/off mains switch  Adjustable memory retention time for step dimming  Adjustable minimum dimmi...