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Revision 1.2, 2015-05-12

About this document

Scope and purpose

This document is a 12W 5.0V, universal input off-line flyback converter evaluation board using Infineon

CoolSET™ F3R80 family, ICE3AR4780VJZ.

Intended audience

This document is intended for users of the ICE3AR4780VJZ who wish to design low cost and high reliable

system of off-line SMPS for enclosed adapter or open frame auxiliary power supply of white goods, PC,

server, DVD, TV, Set-top box, etc.

Table of Contents

About this document ...................................................................................................................1

Table of Contents........................................................................................................................1

1

Abstract .....................................................................................................................3

2

Evaluation board ........................................................................................................3

3

Evaluation board specifications....................................................................................4

4

List of features (ICE3AR4780VJZ) ..................................................................................4

5

Circuit description.......................................................................................................5

5.1

Introduction...............................................................................................................................................5

5.2

Line input ...................................................................................................................................................5

5.3

Line input over voltage protection..........................................................................................................5

5.4

Start up.......................................................................................................................................................5

5.5

Operation mode ........................................................................................................................................5

5.6

Soft start.....................................................................................................................................................5

5.7

RCD clamper circuit...................................................................................................................................5

5.8

Peak current control of primary current.................................................................................................6

5.9

Output stage ..............................................................................................................................................6

AN-EVAL-3AR4780VJZ

12W 5V SMPS evaluation board with

ICE3AR4780VJZ

Application Note