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 timingUBA20260 NXP Semiconductors 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 dimming level 2.5 Protection OverTemperature Protection (OTP) Capacitive Mode Protection (CMP) OverPower Protection (OPP) OverCurrent Protection (OCP) in both boost and burn states Power-down function 2.6 Other features Current controlled operation in both boost and burn state External power-down function 3. Applications Step-dimmable compact fluorescent lamps above 20 W and for universal mains voltages 4. Ordering information Table 1. Ordering information Type number Package Name Description Version UBA20260T/N1 SO16 Plastic small outline package 16 leads body width 3.9 mm SOT109-1 UBA20260 All information provided in this document is subject to legal disclaimers. NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 10 October 2011 2 of 30