UBA20260
NXP Semiconductors
A 20 W application where the UBA20260 is used with external MOSFETs.
Application NoteNxp
Dimmable CFL using the UBA2026X family
Design guide for dimmable CFLs using the UBA2026X family. Covers 120V/230V mains, power factor correction, and integrated or external MOSFET configurations.
Overview
This application note describes the design of dimmable Compact Fluorescent Lamps (CFL) with low dimming levels using the NXP UBA2026X controller family. It covers the UBA20260 for applications up to 20W using external MOSFETs and the UBA20261/2 for applications up to 18W with integrated MOSFETs. The design incorporates a Voltage Source Charge Pump (VSCP) to ensure a power factor greater than 0.6 across all dimming levels. Technical details include resonant tank parameter calculations for both 120V and 230V AC mains, autotransformer configurations to improve efficiency by reducing MOSFET current, and inductive mode preheating strategies to extend lamp life.
Use Cases
- Dimmable CFL ballast design
- High power factor lighting applications
- 120V AC lighting systems
- 230V AC lighting systems
- Compact fluorescent lamp power management
Topics
CFL
step dimmable
UBA2026X
UBA20260
UBA20261
UBA20262
Power Factor Correction
VSCP
resonant tank
ballast controller
Referenced Parts
UBA20261
NXP Semiconductors
Optimal performance is obtained when the UBA20261 is selected for use with 120 V (AC) mains applications.
UBA20262
NXP Semiconductors
The UBA20262 provide optimal performance with 230 V (AC) mains applications.
| UBA20260 | NXP Semiconductors | A 20 W application where the UBA20260 is used with external MOSFETs. |
| UBA20261 | NXP Semiconductors | Optimal performance is obtained when the UBA20261 is selected for use with 120 V (AC) mains applications. |
| UBA20262 | NXP Semiconductors | The UBA20262 provide optimal performance with 230 V (AC) mains applications. |