Application NoteNxp

AN10803: Triac Dimmable CFL Application using UBA2028, UBA2014, and UBA2027x

Design guide for Triac-dimmable CFL applications using NXP UBA2028, UBA2014, and UBA2027x controllers, covering phase cut dimming, charge pump PFC, and resonant tank calculations.

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Overview

This application note provides comprehensive instructions for designing dimmable Compact Fluorescent Lamp (CFL) circuits using the UBA2028, UBA2014, or UBA2027x series of controllers. It details the challenges of interfacing Triac-based phase cut dimmers with CFL loads and proposes a cost-effective charge pump-based Power Factor Corrector (PFC) to maintain stable operation and prevent flicker. The document covers circuit versions with both integrated and external MOSFETs, providing technical insights into resonant tank calculations, phase cut detection, and maintaining the necessary hold current for sustainable Triac conduction.

Use Cases

Designing dimmable Compact Fluorescent Lamp (CFL) ballasts
Implementing charge pump PFC for lighting applications
Optimizing lamp stability for Triac-based phase cut dimmers
Calculating resonant tank parameters for fluorescent tube ignition

Topics

UBA2028

UBA2014

UBA2027x

Dimmable CFL

Triac Dimmer

Charge Pump PFC

Phase Cut Dimming

Resonant Tank

Electronic Ballast

Referenced Parts

UBA2014

NXP

This application note describes how to design a dimmable Compact Fluorescent Lamp (CFL) circuit with the UBA2028, UBA2014 or the new UBA2027x series.

UBA2028

NXP

This application note describes how to design a dimmable Compact Fluorescent Lamp (CFL) circuit with the UBA2028, UBA2014 or the new UBA2027x series.

UBA2027

NXP

This application note describes how to design a dimmable Compact Fluorescent Lamp (CFL) circuit with the UBA2028, UBA2014 or the new UBA2027x series.

UBA2014	NXP	This application note describes how to design a dimmable Compact Fluorescent Lamp (CFL) circuit with the UBA2028, UBA2014 or the new UBA2027x series.
UBA2028	NXP	This application note describes how to design a dimmable Compact Fluorescent Lamp (CFL) circuit with the UBA2028, UBA2014 or the new UBA2027x series.
UBA2027	NXP	This application note describes how to design a dimmable Compact Fluorescent Lamp (CFL) circuit with the UBA2028, UBA2014 or the new UBA2027x series.