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© 2007 Fairchild Semiconductor Page 2 of 17 Rev 1.1 April 2007
www.fairchildsemi.com
Contents
1. Introduction ............................................................................................................................................3
1.1 Product Description ..........................................................................................................................3
1.2 Circuit Description ...........................................................................................................................3
2. Electrical Requirements ............................................................................................................................6
2.1 Input Requirements...........................................................................................................................6
2.2 Output Requirements ........................................................................................................................6
3. Designed Solution ...................................................................................................................................7
3.1 Schematic.......................................................................................................................................7
3.2 Transformer.....................................................................................................................................8
3.3 Bill of Materials ...............................................................................................................................8
3.4 Printed Circuit Board......................................................................................................................10
4. Test Results ...........................................................................................................................................12
4.1 Regulation ....................................................................................................................................12
4.1.1 Line Regulation ..................................................................................................................12
4.2 Efficiency......................................................................................................................................13
4.3 Steady State Operation ..................................................................................................................14
4.4 Start up ........................................................................................................................................15