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.

Features and benefits
Half-bridge features
■ Integrated high-voltage level-shift function with integrated bootstrap diode

Preheat and ignition features
■ Coil saturation protection during ignition
■ 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
■ 4-level step dimming adjustment using a standard on/off mains switch
■ Adjustable memory retention time for step dimming
■ Adjustable minimum dimming level

Protection
■ OverTemperature Protection (OTP)
■ Capacitive Mode Protection (CMP)
■ OverPower Protection (OPP)
■ OverCurrent Protection (OCP) in both boost and burn states
■ Power-down function

Other features
■ Current controlled operation in both boost and burn state
■ External power-down function