Trench-Gate MOSFETs in 48V Platform for Mild Hybrid Electric Vehicle Applications

Abstract

This paper presents a 48V conversion chain typical of a mild hybrid electric vehicle with enhanced strip-layout trench-gate MOSFETs applications. The MOSFETs technology allows modulating the inner device parameters to improve the device impact on the converter application. Several converter topologies used in the 48V bus are considered to explore how the switching transients and thermal issue are linked to power device performance. The correct choice of the MOSFET switch leads to improve the converter design and the reliability of the whole low voltage hybrid electric vehicle application.