Design of high-to-low voltage, low-power integrated isolated DC/DC converters for automotive applications

Inhalt:
High-to-low voltage, low-power isolated DC/DC converters with strong requirements on size, cost and efficiency are required for some specific applications. The existing solutions with the same power/input-voltage ranges are usually based on the Flyback architecture and yield low performances. To overcome these limitations, this work summarizes an ap-proach to design such converter, going through several aspects of the converter design such as the topology, the trans-former and an integrated circuit. The experimental setup allows to verify the converter functionality. The peak efficiency measured for a 4W-prototype is 84% in the case of an 400V-12V converter and 82% for an 800V-12V one.