Investigating effects of magnetizing inductance on coupled-inductor voltage regulators

Coupled inductors are an emerging topology for computing power supplies as next generation CPU requirements for high efficiency and fast transient response pose great challenge on voltage regulator design. This paper addresses the effects of magnetizing inductance on current-balancing, dynamic response, and current-sensing of multiphase voltage regulator with coupled inductors. State Space Averaging and other mathematical analysis methods are employed. Experimental results are provided to verify the analysis.