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Average inductor current sensor for digitally-controlled switched-mode power supplies

dc.contributor.authorRodríguez González, Miguel 
dc.contributor.authorLópez Martín, Víctor Manuel
dc.contributor.authorAzcondo Sánchez, Francisco Javier
dc.contributor.authorSebastián Zúñiga, Francisco Javier 
dc.contributor.authorMaksimovic, Dragan
dc.identifier.citationIEEE Transactions on Power Electronics, 27(8), p. 3795-3806 (2012); doi:10.1109/TPEL.2012.2183893
dc.description.abstractCurrent-mode control in digitally controlled switched-mode power supplies typically requires analog-to-digital (A/D) conversion of at least two signals, voltage, and current. The complexity of voltage A/D converters can be reduced using window A/D techniques. In conventional current A/D conversion, however, relatively high resolution is required over a wide range of signals, which results in increased complexity, power consumption, and cost of the controller. This paper proposes a very simple feedback sensor capable of high-resolution average inductor current sensing using two analog comparators and an analog low-pass filter. The approach requires very few external components and employs minimal digital hardware resources. A dynamic model and performance of the average inductor current sensor are experimentally verified on a 12-V input, 19-V output, 50-W boost converter prototype. The applicability of the proposed sensor is demonstrated in a digitally controlled 400-W, 400-V output Boost power factor preregulatoreng
dc.format.extentp. 3795-3806spa
dc.relation.ispartofIEEE Transactions on Power Electronics, 27(8)spa
dc.titleAverage inductor current sensor for digitally-controlled switched-mode power supplieseng
dc.typejournal article

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