Analysis of the Power Conversion Modes for Power-Efficient Energy Harvesting Interfaces
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This paper analyzes the power conversion efficiency of conventional buck and buck-boost modes for power-efficient energy harvesting interfaces. In the state-of-the-art energy harvesting interfaces, they transfer harvested power mostly based on the conventional buck-boost mode. Since the power conversion efficiency is one of the most important performance factors for energy harvesting converters, this paper focuses on comparing the conventional power conversion modes based on formulas. In addition, the energy harvesting converter is designed in a 180 nm CMOS process and is simulated to prove that the power can be transferred properly with the analyzed power conversion modes. The converter operates in the discontinuous conduction mode with pulse-skipping modulation and employs the conventional open-circuit voltage method to track the maximum power point of each source. An adaptive on-time controller manages the inductor charging period, and a zero current detector, which is digitally operated, determines the optimum zero current point.
Abstract
This paper analyzes the power conversion efficiency of conventional buck and buck-boost modes for power-efficient energy harvesting interfaces. In the state-of-the-art energy harvesting interfaces, they transfer harvested power mostly based on the conventional buck-boost mode. Since the power conversion efficiency is one of the most important performance factors for energy harvesting converters, this paper focuses on comparing the conventional power conversion modes based on formulas. In addition, the energy harvesting converter is designed in a 180 nm CMOS process and is simulated to prove that the power can be transferred properly with the analyzed power conversion modes. The converter operates in the discontinuous conduction mode with pulse-skipping modulation and employs the conventional open-circuit voltage method to track the maximum power point of each source. An adaptive on-time controller manages the inductor charging period, and a zero current detector, which is digitally operated, determines the optimum zero current point.
참고문헌 (14)
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