ICE2QR2280G-1_15 Datasheet, PDF(3/14 Page) Infineon Technologies AG – 20 W 5 V SMPS Evaluation Board with Quasi- Resonant CoolSET™ ICE2QR2280G-1

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ICE2QR2280G-1_15 Datasheet, PDF (3/14 Pages) Infineon Technologies AG – 20 W 5 V SMPS Evaluation Board with Quasi- Resonant CoolSET™ ICE2QR2280G-1

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20 W 5 V SMPS Evaluation Board with

Quasi-Resonant CoolSETâ¢ ICE2QR2280G-1

Abstract

This application note is a description of 20 W switching mode power supply evaluation board designed in a

quasi resonant flyback converter topology using ICE2QR2280G-1 Quasi-resonant CoolSETâ¢ .The target

application of ICE2QR2280G-1 are for set-top box, portable game controller, DVD player, netbook adapter

and auxiliary power supply for LCD TV, etc. With the CoolMOSâ¢ integrated in this IC, it greatly simplifies the

design and layout of the PCB. Due to valley switching, the turn on voltage is reduced and this offers higher

conversion efficiency comparing to hard-switching flyback converter. With the DCM mode control, the

reverse recovery problem of secondary rectify diode is relieved. And for its natural frequency jittering with

line voltage, the EMI performance is better. Infineonâs digital frequency reduction technology enables a

quasi-resonant operation till very low load. As a result, the system efficiency, over the entire load range, is

significantly improved compared to conventional free running quasi resonant converter implemented with

only maximum switching frequency limitation at light load. In addition, numerous adjustable protection

functions have been implemented in ICE2QR2280G-1 to protect the system and customize the IC for the

chosen application. In case of failure modes, like open control-loop/over load, output overvoltage, and

transformer short winding, the device switches into Auto Restart Mode or Latch-off Mode. By means of the

cycle-by-cycle peak current limitation plus foldback point correction, the dimension of the transformer and

current rating of the secondary diode can both be optimized.Thus, a cost effective solution can be easily

achieved.

Evaluation board

This document contains the list of features, the power supply specification, schematic, bill of material and

the transformer construction documentation. Typical operating characteristics such as performance curve

and scope waveforms are showed at the rear of the report.

Figure 1 EVAL ICE2QR2280G-1

Application Note

Revision 1.1, 2015-04-02

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