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This paper presents a novel step-up power converter architecture for portable applications with multicell battery packs that integrates battery cell balancing function. Compared to conventionally used boost converter, which is not providing cell balancing, the new architecture has smaller overall volume and approximately the same power processing efficiency. The step-up function is obtained using...
Multi-level flying-capacitor converters are a promising topology for low-power applications. Conventional buck, 3- and 4-level converters have been modeled as a geometric program and optimized for loss and volume. Results show that 3- and 4-level converters are both smaller and more efficient over a wide range of design parameters.
This paper introduces a new battery management system for portable electronics applications based on the flyback converter. This new architecture integrates the voltage step-up and balancing functions inside a single converter. The step-up function is obtained using an assisting concept, where the flyback output is placed at the top of the battery pack and is therefore only processing a portion of...
This paper introduces a 2-stage power management architecture for battery powered portable applications. The presented topology combines a fixed ratio multi-output switched capacitor converter stage with two-input buck converters to achieve low volume and high power processing efficiency. Experimental comparisons with a two-cell battery input conventional 5 V bus architecture, providing 15 W of total...
This paper introduces a digitally-controlled buck converter with adaptive core biasing that allows for minimization of the output capacitor as well as of the inductor core. The improved performances are obtained through adaptive relocation of the converter operating point on the B-H curve of the inductor core, with the help of a digitally controlled low-power biasing circuit and an extra inductor...
This paper introduces a digitally-controlled 2-stage single-phase rectifier with power factor correction (PFC) that is well suited for emerging low-power applications requiring programmable supply voltage. The rectifier is a modification of a flyback-buck cascaded configuration where the intermediate energy storage capacitor is replaced by a non-symmetric capacitive divider with independent control...
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