STROMBOLI®: a new platform for Isolated DC-DC Converters with reliable operation from −55°C up to 225°C
Pierre Delatte, Aimad Saib, Etienne Vanzieleghem, Jean-Christophe Doucet · Additional Conferences (Device Packaging HiTEC HiTEN & CICMT) · 2011
This paper presents a new high-temperature isolated DC-DC converter platform called STROMBOLI®. It also discusses how this converter can be associated with the various solutions proposed by CISSOID for Point-of-Load (POL) regulators that can be either linear or switched mode. STROMBOLI® has been optimized to efficiently convert input voltages up to 350V into multiple output voltages up to +/−25V. As an example, in a +/−12V symmetrical output configuration, standard STROMBOLI® can deliver 25W with efficiencies up to 70% at 225°C. The galvanic isolation between input and outputs is at least 10MΩ at 500V. As the main objective of this development was to provide designers with a solution highly flexible, scalable, and easily adaptable to their specific requirements, we selected well-known and robust flyback architecture. Efficiency has been optimized thanks to synchronous rectification. However it can be replaced by a standard rectification in order to reduce the bill-of-material (BOM). A magnetic feedback provides the output voltage temperature stability and the load regulation. STROMBOLI® also includes an Under-Voltage-Lockout (UVLO) function and the pulse-by-pulse current sensing provides intrinsic output current limitation in case of overload or short-circuits. STROMBOLI® is a state-of-the-art, turnkey reference design suitable for 225°C reliable operation and is part of high temperature DC-DC converters VOLCANO family.