AN3329 datasheet(1/47 Pages) STMICROELECTRONICS

Numer części	AN3329

Szczegółowy opis	This application note describes the characteristics and features

PDF	47 Pages

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Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

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1 / 47 page

February 2011

Doc ID 18376 Rev 1

1/47

AN3329

Application note

170 W power supply with PFC and standby supply for flat TV

using the L6564, L6599A, and Viper27LN

Introduction

This application note describes the characteristics and features of a 170 W, wide input

mains range, power-factor-corrected, demonstration board for flat TVs or industrial

applications. The electrical specifications are tailored to a typical flat TV.

The architecture is made up of three stages: a front-end PFC pre-regulator based on the

L6564 TM (transition mode) boost PFC controller and a downstream LLC resonant half

bridge converter stage, built around the new L6599A resonant controller, which provides two

regulated output voltages at 12 V and 24 V. In addition, a flyback-based standby supply

delivers 10 W to a 5 V output. Thanks to the chipset used, this design achieves very high

efficiency, compliant with ENERGY STAR® eligibility criteria (EPA rev. 2.0 EPS), as well as

very low input consumption during standby operation.

Figure 1.

EVL170W-FTV: 170 W demonstration board

www.st.com

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