Prediction of inductor AC power loss in PSiP buck converter based on Steinmetz parameters

Miniaturization of magnetic components employed in power electronic devices is interrelated to increasing switching frequency. That increases the need of studies on magnetic components at high frequency, above 1MHz. Some models have been developed for core loss calculations. Models based on Steinmetz´s parameters are the most convenient ways. However, these models are still in need for more validation for small size components, especially at high switching frequencies. This study aims to validate recent models of AC power loss for inductor integrated in buck converter switching at frequencies higher than 1MHz showing their limitations. Then, a systematic way to correct inductor Steinmetz´s parameters based on device level measurements is developed to improve correlation of predicted results.