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Original version
Dinulovic, D.; Gerfer, A.; Opitz, O.; Kaiser, M.; Wurz, M.C.; et al.: Thin-film microtransformer for high frequency power applications. In: EPJ Web of Conferences 75 (2014), 6006. DOI: https://doi.org/10.1051/epjconf/20147506006
This paper describes a development of a microtransformer device fabricated using thin film technology. The device is designed for higher switching frequencies beyond to 50 MHz power applications. A especially by the microtransformer is a design, which allows wide flexibility of a device by choosing a different values of an inductance and of a windings ratio. The microtransformer device is integrated on silicon substrate consisting of a closed magnetic core and six coils. Both, primary and secondary device side consist three coils. Therefore, this design allows using of a device for different switching frequencies. As a magnetic material for transformer core a permalloy NiFe45/55 was chosen.