How To Model Coupled Inductors In A SEPIC Converter
by Wei Gu, Analog Devices, San Jose, Calif., How2Power Today, Feb 14 2025
Focus:
Converter designs based on the single-ended primary inductance converter (SEPIC) topology
often opt to use a coupled inductor both to reduce the number of components and overall
converter size, and to simplify control. However, this design choice complicates
simulation: If the coupled inductor is not modeled correctly, the simulated result can be
quite different from the bench result. This article discusses how
to best model coupled inductors in a SEPIC design. Methods to build a proper model are
introduced, the equations are included and a design example is presented.
What you’ll learn:
- How to model coupled inductors in LTspice for simulation of SEPIC converters
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