ICE2QR2280G-1_15 Datasheet, PDF (1/14 Pages) Infineon Technologies AG – 20 W 5 V SMPS Evaluation Board with Quasi- Resonant CoolSET™ ICE2QR2280G-1

AN-EVAL ICE2QR2280G-1
20 W 5 V SMPS Evaluation Board with Quasi-
Resonant CoolSET™ ICE2QR2280G-1
Application Note
About this document
Scope and purpose
This document is an engineering report that describes universal input 20 W 5 V off-line flyback converter
using Infineon Quasi-Resonant CoolSET™ ICE2QR2280G-1 which offers high efficiency, very low standby
power, wider VCC operating range and various mode of protections for a high reliable system. This evaluation
board is designed to evaluate the performance of ICE2QR2280G-1 in ease of use.
Intended audience
This document is intended for users of the ICE2QR2280G-1 who wish to design low cost, high efficiency
Quasi-Resonant off-line SMPS for small power supply such as Blu-ray, DVD player, set-top box, game
console, smart meter, charger and auxiliary power of high power system such as LED TV, etc.
Table of Contents
About this document ...................................................................................................................1
Table of Contents........................................................................................................................1
1
Abstract .....................................................................................................................3
2
Evaluation board ........................................................................................................3
3
Specification of evaluation board .................................................................................4
4
Features of ICE2QR2280G-1 ..........................................................................................4
5
Circuit description.......................................................................................................4
5.1
Mains input rectification and filtering.....................................................................................................4
5.2
Integrated MOSFET and PWM control.....................................................................................................4
5.3
Output stage ..............................................................................................................................................5
5.4
Feedback loop ...........................................................................................................................................5
6
Circuit operation.........................................................................................................5
6.1
Startup operation......................................................................................................................................5
1
Revision 1.1, 2015-04-02