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ICE2QS03G_16 Datasheet, PDF (1/28 Pages) Infineon Technologies AG – 45 W adapter demo board
AN_201604_PL52_018
45 W adapter demo board
Using the new 800 V CoolMOS™ P7 and ICE2QS03G quasi-resonant PWM
controller
Authors:
Jared Huntington
Stefan Preimel
Scope and purpose
The demo board described in this application note provides a test platform for the new 800 V CoolMOS™ P7
series of high voltage MOSFETs. The adapter uses ICE2QS03G, a second generation current mode control quasi-
resonant flyback controller and an IPA80R450P7 800 V CoolMOS™ P7 series power MOSFET. This application
note is intended for those that have experience with flyback converter designs and will not go in depth about the
overall design process for flyback converters, but will cover specific design aspects for this controller and 800 V
CoolMOS™ P7 in charger and adapter applications. It will also look at the overall benefits that the 800 V
CoolMOS™ P7 presents for switch mode power supplies. For a detailed introduction on flyback converter design
please read Design guide for QR Flyback converter [1].
Intended audience
Power supply design engineers
Table of contents
1
Description.........................................................................................................................................2
2
Quasi-resonant flyback overview.......................................................................................................3
3
ICE2QS03G functional overview.........................................................................................................4
™
4
800 V CoolMOS P7 overview .............................................................................................................5
4.1
FullPAK vs. DPAK thermal performance .................................................................................................7
5
Design considerations........................................................................................................................9
5.1
800 V MOSFET ..........................................................................................................................................9
5.2
UVLO circuit ...........................................................................................................................................10
6
Demo board overview ......................................................................................................................12
6.1
Demo board pictures.............................................................................................................................12
6.2
Demo board specifications ...................................................................................................................12
6.3
Demo board features ............................................................................................................................13
6.4
Schematic ..............................................................................................................................................14
6.5
BOM with Infineon components in bold...............................................................................................15
6.6
PCB layout .............................................................................................................................................16
6.7
Transformer construction.....................................................................................................................17
7
Measurements .................................................................................................................................19
7.1
Test measurements under different line and load conditions ............................................................19
7.2
Normal operation..................................................................................................................................20
7.3
Surge testing..........................................................................................................................................22
7.4
Thermal performance under typical operating conditions.................................................................23
8
Conclusion .......................................................................................................................................26
9
References .......................................................................................................................................27
Application Note
www.infineon.com
Please read the Important Notice and Warnings at the end of this document
Revision 1.0
2016-06-27