Datasheet

User's Guide

SLUU505A–May 2011–Revised October 2011

Buck PFC Pre-Regulator in Power Factor Correction

Applications

1 Introduction

This EVM is to help evaluating UCC29910A buck PFC pre-regulator controller device in Power Factor

Correction (PFC) applications especially targeting notebook computer charger area with universal AC

input voltages.

2 Description

The EVM is a 100-W buck PFC pre-regulator with universal AC input between 90 V

and 264 V

, input

frequency between 47 Hz and 63 Hz, and output voltage nominal 84 V

and maximum load current 1.2 A.

2.1 Typical Applications

• High Efficiency AC-DC Adapters

• Low Profile and High Density Adapters

2.2 Features

• Universal Line Input AC Voltage (between 90 V

and 264 V

, with frequency range 47 Hz and 63 Hz)

• Regulated Output DC Voltage (84 V

with maximum 1.2-A load current)

• Output Voltage Regulation From no Load to Full Load, and From Low Line to High Line

• High Efficiency 96% Peak and 95% at Full Load

• High Power Factor Over 0.9

• Double Sided PCB Layout

• Buck PFC Technology

• Non-Latching Input Under Voltage Protection

• Over Current Protection

• Test Points to Facilitate Device and Topology Evaluation

Buck PFC Pre-Regulator in Power Factor Correction Applications SLUU505A–May 2011– Revised October 2011

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