Efficiency Optimization in Burst-Mode Buck DC/DC Converters for Sensor Nodes
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hdl:2117/128244
Tipus de documentArticle
Data publicació2018-07-08
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Abstract
In autonomous sensor nodes, switching dc/dc
converters are usually employed to power the sensor electronics
and also to maintain the operating voltage of an energy
transducer around its maximum power point. In such a context,
this paper optimizes the power efficiency of buck dc/dc
converters when operating in burst mode, which is preferable
than the conventional pulse-width modulation technique in lowpower
sensor applications. The optimization is carried out by
selecting an optimal inductor current to efficiently transfer the
energy from the input to the output during the burst. Such
optimization is applied when regulating the converter’s output
voltage, which corresponds to the supply voltage of the sensor
electronics, and also the input voltage, which corresponds to the
operating voltage of the energy transducer that is here a
photovoltaic module. The theoretical analysis and the
experimental results reported herein prove the existence of such
an optimal inductor current in both scenarios. Experimental tests
with a commercial buck dc/dc converter (TPS62750) show that
the use of this optimal inductor current provides up to 9%
increase in efficiency, thus prolonging the operating lifetime of
the sensor node.
Descripció
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CitacióReverter, F.; Glaser, C.; Gasulla, M. Efficiency Optimization in Burst-Mode Buck DC/DC Converters for Sensor Nodes. "IEEE sensors journal", 8 Juliol 2018, vol. 18, núm. 17, p. 7141-7149.
ISSN1530-437X
Versió de l'editorhttps://ieeexplore.ieee.org/document/8408801
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