APPLICATION NOTE
Designing for Efficiency
A Simulation Driven Evaluation of Si vs SiC Devices in a Push-Pull DC-DC Converter
Power conversion efficiency strongly influences thermal performance, reliability, and lifetime
operating cost in modern electronic systems. Even modest improvements in efficiency can
significantly reduce internal heating and extend component lifetime when products are
deployed at scale.
Wide bandgap semiconductors such as silicon carbide (SiC) offer measurable advantages over
traditional silicon (Si) devices, particularly in high-frequency switching converters. However,
these advantages must be evaluated within a complete converter architecture rather than
through isolated device specifications.
This application note presents a simulation-driven comparison of Si and SiC devices in a
push-pull isolated DC-DC converter using a UC1846 PWM controller. Transient circuit
simulation quantifies loss mechanisms and steady-state efficiency. The downloadable
reference design allows engineers to reproduce and extend the analysis to their own
operating conditions.
