Optimal inductor current in boost DC/DC converters operating in burst mode under light-load conditions
This letter analyzes how the efficiency of boost dc/dc converters operating in burst mode under light-load conditions can be improved by an appropriate selection of the inductor current that transfers energy from the input to the output. A theoretical analysis evaluates the main power losses (fixed,...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2016 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/102364 |
| Acceso en línea: | https://hdl.handle.net/2117/102364 https://dx.doi.org/10.1109/TPEL.2015.2454331 |
| Access Level: | acceso abierto |
| Palabra clave: | Electric current converters Electric circuits Boost converter burst mode dc/dc converter efficiency light-load conditions DC-DC CONVERTER BUCK CONVERTER CMOS MODULATION EFFICIENCY Convertidors de corrent elèctric Circuits electrònics -- Alimentador Àrees temàtiques de la UPC::Enginyeria de la telecomunicació |
| Sumario: | This letter analyzes how the efficiency of boost dc/dc converters operating in burst mode under light-load conditions can be improved by an appropriate selection of the inductor current that transfers energy from the input to the output. A theoretical analysis evaluates the main power losses (fixed, conduction, and switching losses) involved in such converters, and how do they depend on the inductor current. This analysis shows that there is an optimal value of this current that causes minimum losses and, hence, maximum efficiency. These theoretical predictions are then compared with experimental data resulting from a commercial boost dc/dc converter (TPS61252), whose average inductor current is adjustable. Experimental results show that the use of the optimal inductor current, which was around 340 mA for an output voltage of 5 V, provides an efficiency increase of 7%. |
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