1 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
