Abstract
The paper proposes a generalized electromagnetic interference (EMI) noise source modeling technique based on network theory for switched-mode power supply. With three impedances and two noise sources, the developed noise source model not only characterizes the differential and common mode noises, but also suits for mixed-mode noise analysis. The novelty of the proposed technique is the inclusion of topology information of the power converter into consideration, which helps to check the model applicability, simplifies the parameter extraction process and brings physical meaning to the developed model. Moreover, to comply with the mixed-mode noise source model, a four-port network description is used to model the noise propagation paths. The corresponding EMI noise prediction process is provided as well. A boost converter prototype is used for validation of the model.
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