Planar Flyback Power Converter

Design Process

Input Voltage
Output Voltage & Current
Switching Frequency
Transformer Core Selection
Air Gap

Flyback Transformer Power Supply Design and Calculator

Fairchild AN4137, Design Guidelines for Off-line Flyback Converters
Off-line Switching Mode Power Supply (SMPS) Design Tools

Coilcraft Structured Design of Switching Power Transformers

Coiltronics Solution Finder
Cooper Bussmann Transformers
Versa-Pac datasheet
Using the Versa-Pac as a flyback transformer
Versa-Pac Flyback Calculator (XLS)

Application Engineers
Linear Tech
Ferroxcube / Elna
Semiconductor MFG