A Guideline for Silicon Carbide MOSFET Thermal Characterization based on Source-Drain Voltage

TL;DR

This paper evaluates the feasibility of using source-drain voltage for thermal characterization of SiC MOSFETs, providing guidelines to improve accuracy, resolution, and stability in measurements.

Contribution

It offers a comprehensive investigation into the limitations and procedures for thermal transient measurement of SiC MOSFETs using source-drain voltage.

Findings

Identifies key parameters affecting measurement accuracy.

Provides guidelines for reproducible thermal transient testing.

Analyzes static and dynamic performance impacts.

Abstract

Thermal transient measurement based on source-drain voltage is a standard method to characterize thermal properties of silicon semiconductors but is doubtful to be directly applied to silicon carbide (SiC) devices. To evaluate its feasibility and limitations, this paper conducts a comprehensive investigation into its accuracy, resolution, and stability towards yielding the structure information of SiC MOSFET using the source-drain voltage as the temperature sensitive electrical parameter. The whole characterization process involves two main procedures and associated key testing parameters, such as gate voltages, sensing and heating currents, etc. Their impacts on both the static and dynamic performances are also investigated with the aim of providing a guideline for conducting a reproducible thermal transient measurement for SiC MOSFETs.