AN3339 datasheet(1/44 Pages) STMICROELECTRONICS

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Giải thích chi tiết về linh kiện	185 W power supply with PFC and standby supply for LED TV

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August 2012

Doc ID 18449 Rev 2

1/44

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

www.st.com

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