an23TinySwitch Flyback Design Methodology Application Note AN-23 Introduction This document describes a simple Design Methodology for flyback power supply design using the TinySwitch family of integrated off-line switchers. The objective of this Design Methodology is to provide power supply engineers a handy tool that not only eases the design task but also delivers design optimization in cost and efficiency for most applications. TM Design Flow Figures 2A, B and C present a design flow chart showing the complete design procedure in 22 steps. The logic behind this Design Methodology can be summarized as follows: 1. Calculate minimum reflected voltage, VOR, allowed by a given output diode. 2. Design for discontinuous mode operation using this calculated VOR. If necessary, increase VOR. 3. A……