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UBA2024B CFL ballast up to 120 V (AC) without voltage doubler

Posted: 03 Feb 2011 ?? ?Print Version ?Bookmark and Share

Keywords:CFL ballast? UBA2024? precision oscillator?

This application note describes the design process of a CFL ballast for mains voltages from 100 V (AC) to 120 V (AC). The UBA2024 is a family of integrated half-bridge power IC's designed for use in an integrated/sealed Compact Fluorescent Lamp (CFL) with lamp powers of up to 26 W. Typical input voltages are 100 V (AC) to 127 V (AC) and 220 V (AC) to 240 V (AC). The term lamp is used throughout this publication meaning both burner and electronic ballast.

The UBA2024 includes both half-bridge power transistors with a level shifter and drivers, bootstrap circuitry, an internal power supply, a precision oscillator and a start-up frequency sweep function for soft start and/or quasi-preheating. Due to the high level of integration,only a few external components are needed in a lamp ballast with the UBA2024.

View the PDF document for more information.

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