High Frequency, Soft Transitions Converter
A high efficiency, high power density power conversion technology is presented. This topology is compatible with high output voltage applications such as 24V and 48V, where Schottky rectifiers cannot be used. The converter combines zero voltage switching across the primary switches, continuous energy transfer from the primary to the secondary and soft commutations of the output rectifiers. The soft switching of the output rectifiers minimizes the reverse recovery losses associated with ultra fast rectifiers operating at high frequency. An experimental converter using this concept is evaluated. The converter operates from an input voltage of 200V to 430V at 300 KHz, providing 400W (50V@8A) with efficiency of 95% at full load.
