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This work investigates power losses in conventional and multi-level buck converters. Conduction and switching losses are modeled for conventional, 3-level and 5-level buck converters as a function of technology parameters, design variables and the operating point. It is shown that for a given set of technology parameters and optimized design variables, multi-level buck converters achieve higher efficiencies...
Field effect transistor (FET) or bipolar junction transistor (BJT) based circuits, involving emitter/source degeneration by any general impedance are widely known for their positive effects on circuit performance. The circuit's behavior like input-output impedances, trans-admittance, voltage and power gains of such topologies are well known. In this paper, we propose to analyze the topology by looking...
In this paper the common-mode noise generation mechanism and its suppression is presented for the hard-switched isolated full-bridge forward topology. Due to the extensive interleaving of primary and secondary windings, such transformers exhibit large inter-winding capacitance which is the well-known cause of large common-mode noise current in the converter. Therefore, the effect of this large coupling...
In telecom applications, the vision for a total power conversion efficiency from the mains to the output of point-of-load (PoL) converters of 95% demands optimization of every conversion step, i.e., the power factor correction (PFC) rectifier front-end should show an outstanding efficiency in the range of 99%. For recently discussed 400-V dc distribution bus voltages, a buck-type PFC rectifier is...
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