AN3339 Datasheet, PDF (1/44 Pages) STMicroelectronics – 185 W power supply with PFC and standby supply for LED TV

AN3339
Application note
185 W power supply with PFC and standby supply for LED TV
using the L6564, L6599A, and VIPER27LN
By Claudio Spini
Introduction
This document describes the characteristics and features of a 185 W, wide input mains
range, power-factor-corrected, demonstration board for LED TV.
The architecture is based on a three-stage approach: a front-end PFC pre-regulator based
on the L6564 TM PFC controller and a downstream LLC resonant half bridge converter
using the L6599A resonant controller, delivering 12 V, 24 V, and 130 V. A flyback-based
standby supply delivering 5 V, controlled by the VIPER27LN, is also implemented. Thanks to
the chipset used, the principal factors of this design are the very high efficiency as well as
the very low input consumption during standby operation.
Figure 1. EVL185W-LEDTV: 185 W demonstration board
August 2012
Doc ID 18449 Rev 2
1/44
www.st.com