An off-chip input capacitor-less boost converter with fast MPPT for energy harvesting

Sangkwon Lee; Jinseong Jeong

doi:10.1587/elex.11.20140385

An off-chip input capacitor-less boost converter with fast MPPT for energy harvesting

Sangkwon Lee, Jinseong Jeong

School of Electrical and Computer Engineering

University of Seoul

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

In this paper, a boost converter with fast MPPT capability is proposed for energy harvesting applications. The sampling time for maximum power point voltage, V_MPP of harvester device is extremely shortened by using inductor current conservation method and an offchip input capacitor-less boost converter. The proposed boost converter is designed in a standard 0.13μm CMOS process and compared with a conventional MPPT boost converter. The proposed architecture can sample V_MPP more than 100 times faster than the conventional architecture. Power conversion efficiency of the harvesting system also improves due to the fast V_MPP sampling. For the scenario used in this paper, the overall efficiency improves from 70% to 85%. This architecture can be applied to any energy harvesting systems and is especially effective when the ambient parameter such as temperature or light intensity changes relatively rapidly.

Original language	English
Article number	20140385
Journal	IEICE Electronics Express
Volume	11
Issue number	13
DOIs	https://doi.org/10.1587/elex.11.20140385
State	Published - 19 Jun 2014

Keywords

Boost converter
Dual-boundary control
Energy harvesting
Inductor current conservation
MPPT

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abstract = "In this paper, a boost converter with fast MPPT capability is proposed for energy harvesting applications. The sampling time for maximum power point voltage, VMPP of harvester device is extremely shortened by using inductor current conservation method and an offchip input capacitor-less boost converter. The proposed boost converter is designed in a standard 0.13μm CMOS process and compared with a conventional MPPT boost converter. The proposed architecture can sample VMPP more than 100 times faster than the conventional architecture. Power conversion efficiency of the harvesting system also improves due to the fast VMPP sampling. For the scenario used in this paper, the overall efficiency improves from 70% to 85%. This architecture can be applied to any energy harvesting systems and is especially effective when the ambient parameter such as temperature or light intensity changes relatively rapidly.",

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AB - In this paper, a boost converter with fast MPPT capability is proposed for energy harvesting applications. The sampling time for maximum power point voltage, VMPP of harvester device is extremely shortened by using inductor current conservation method and an offchip input capacitor-less boost converter. The proposed boost converter is designed in a standard 0.13μm CMOS process and compared with a conventional MPPT boost converter. The proposed architecture can sample VMPP more than 100 times faster than the conventional architecture. Power conversion efficiency of the harvesting system also improves due to the fast VMPP sampling. For the scenario used in this paper, the overall efficiency improves from 70% to 85%. This architecture can be applied to any energy harvesting systems and is especially effective when the ambient parameter such as temperature or light intensity changes relatively rapidly.

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An off-chip input capacitor-less boost converter with fast MPPT for energy harvesting

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Keywords

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