Measurement of WBG-based power supplies

This paper discusses different measurement
methods to evaluate the efficiency of WBG-based
power supply solutions, including electrical
measurement methods and their verification with
calorimetric methods, and compares the
performance of Si-based and GaN-based
chargers. The efficiency of chargers was
measured at different load conditions, and it was
observed that the maximum efficiency occurred
generally at higher powers. GaN-based solutions
outperformed Si-based chargers at higher power
levels, leading to significant energy savings. The
paper suggests that regulations for efficiency can
be tighten and different voltage modes shall be
included to ensure further energy savings. The
benefits of using WBG devices are more evident
in terms of power density, which could lead to
their wider adoption in other power electronic
applications.