AN-26

This application note is for engineers starting a flyback power supply design with TOPSwitch-FX. It offers a quick method to select the proper TOPSwitch-FX device from parameters that are usually not available until much later in the design process. The TOPSwitch-FX Flyback Quick Selection Curves provide the essential design guidance to estimate requirements before even starting to build a prototype.

Curves estimating the efficiency of the Power Supply and the corresponding dissipation for the TOPSwitch-FX devices are provided. They form a powerful tool for estimating cost and project requirements before even committing to or starting development. This application note is similar to AN-21 'Quick Selection Curves' for the TOPSwitch-II family.