This paper introduces a new design method for low voltage power MOSFETs suitable for high current low voltage converter applications. It uses a new strip-based structure and presents interesting characteristics due to the advanced design rules typical of VLSI processes and strong reduction of the on-state resistance.
The document presents an application note (AN1506) focusing on a new concept for designing low-voltage power MOSFETs suitable for high-current, low-voltage converter applications. It introduces a strip-based geometry that overcomes the limitations of traditional cell structures by offering simplified fabrication steps and enhanced device ruggedness.
The note specifically analyzes the STB80NF55 MOSFET as a candidate for an AC motor drive system used in wheelchairs. It details the static and dynamic behavior of the device, including on-state resistance, switching losses, and thermal characteristics within this specific application context.
The document describes a motor drive system specifically designed for wheelchair applications.
The STB80NF55 device was selected as the candidate for the actual application in an AC drive.
The technology allows for high current handling in switching conditions up to 150A.