The key role of the SJ MOSFET with fast diode in high-end SMPS converters for telecom applications

The increasing demand of electronic systems in car electrification as well as in IoT (internet of thing) applications requires power supply with large power output, high efficiency, and small size factor. In this framework, the main topologies used for telecom switch-mode-power-supply (SMPS) have been investigated in this paper. Performance and reliability of the SMPS are mainly related to the MOSFET characteristics, and a primary aspect of such high-level applications is to ensure the service continuity. The new products of super junction (SJ) MOSFETs with very fast diode are the best candidate to match the above expectations. This work describes the reasons underlying the performance improvement and presents the experimental results confirming that SJ MOSFETs with very fast diode is the suitable technology to be used for telecom zero voltage switching SMPS.