THERMAL SHUTDOWN FOR POWER CONVERTERS

摘要

A magnetic thermal shutdown for use in a power converter comprising a pair of switching elements connected in a bridge mode configuration; a control device for controlling the switching operation of the switching elements; a resonant network; a transformer having a low curie temperature lossy magnetic core with a primary winding and a secondary winding, the primary winding being connected to an output capacitor and the secondary winding being connected to a rectifying device and a load; wherein the switching elements and the rectifying device are implemented using power semiconductors; a thermally conductive material surrounding the magnetic core; a common heat sink thermally coupled to all power semiconductors as well as the magnetic core; and a high thermal resistive element to separate the thermal conductive material from the common heat sink.