A variable step-down conversion ratio switched capacitor DC--DC converter for energy harvesting systems working in intermittent mode

Hao Wenhan; Jia Chen; Chen Hong; Zhang Chun; Wang Zhihua

doi:10.1088/1674-4926/30/12/125008

J. Semicond. > 2009, Volume 30 > Issue 12 > 125008

SEMICONDUCTOR INTEGRATED CIRCUITS

A variable step-down conversion ratio switched capacitor DC--DC converter for energy harvesting systems working in intermittent mode

Hao Wenhan, Jia Chen, Chen Hong, Zhang Chun and Wang Zhihua

+ Author Affiliations

DOI: 10.1088/1674-4926/30/12/125008

Abstract: Energy harvesting systems stimulate the development of power management for low power consumption applications. Improving the converter efficiency of power management circuits has become a significant issue in energy harvesting system design. This paper presents a variable step-down conversion ratio switched capacitor (SC) DC–DC converter to advance the converter efficiency of charge on the stored capacitor in a wireless monitoring system of orthopedic implants. The converter is designed to work at 1 MHz switching frequency and achieves 15 to 2 V conversion. Measurement results show that the converter efficiency can reach 42% including all circuit power consumption, which is much higher than previous work.

Key words: energy harvesting system

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Hao Wenhan, Jia Chen, Chen Hong, Zhang Chun, Wang Zhihua. A variable step-down conversion ratio switched capacitor DC--DC converter for energy harvesting systems working in intermittent mode[J]. Journal of Semiconductors, 2009, 30(12): 125008. doi: 10.1088/1674-4926/30/12/125008

Hao W H, Jia C, Chen H, Zhang C, Wang Z H. A variable step-down conversion ratio switched capacitor DC--DC converter for energy harvesting systems working in intermittent mode[J]. J. Semicond., 2009, 30(12): 125008. doi: 10.1088/1674-4926/30/12/125008.

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Received: 18 August 2015 Revised: 29 July 2009 Online: Published: 01 December 2009

Energy harvesting systems stimulate the development of power management for low power consumption applications. Improving the converter efficiency of power management circuits has become a significant issue in energy harvesting system design. This paper presents a variable step-down conversion ratio switched capacitor (SC) DC–DC converter to advance the converter efficiency of charge on the stored capacitor in a wireless monitoring system of orthopedic implants. The converter is designed to work at 1 MHz switching frequency and achieves 15 to 2 V conversion. Measurement results show that the converter efficiency can reach 42% including all circuit power consumption, which is much higher than previous work.

A variable step-down conversion ratio switched capacitor DC--DC converter for energy harvesting systems working in intermittent mode

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