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