In summary, ST Microelectronics offers many powerful control ICs for offline high voltage power supplies. Specifically VIPer Plus, ALTAIR, and the L6566 each offer excellent feature sets for implementing sub-100 W flyback topologies, among others. Each has a wide number of evaluation and support tools at the disposal of the designer, including the powerful online eDesignSuite tool. For more information on this or other ST power components visit www.st.com.