A 400 nW Single-Inductor Dual-Input-Tri-Output DC-DC Buck-Boost Converter With Maximum Power Point Tracking for Indoor Photovoltaic Energy Harvesting

被引：90

作者：

Yu, Guolei ^{[1
]}

Chew, Kin Wai Roy ^{[1
]}

Sun, Zhuo Chao ^{[1
]}

Tang, Howard ^{[1
]}

Siek, Liter ^{[1
]}

机构：

[1] Nanyang Technol Univ, IC Design Ctr Excellence, VIRTUS, Singapore 639798, Singapore

来源：

IEEE JOURNAL OF SOLID-STATE CIRCUITS | 2015年 / 50卷 / 11期

关键词：

Buck-boost converter; dc-dc converter; discontinuous conduction mode (DCM); energy harvesting; pulse-frequency modulation (PFM); pulse-skipping modulation (PSM); SOLAR; MPPT;

D O I：

10.1109/JSSC.2015.2476379

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper presents a single-inductor dual-input-tri-output buck-boost (DITOBB) converter that manages energy harvesting, energy storage, and power rail regulation of an indoor remote sensor system. The converter operates in discontinuous conduction mode (DCM) and regulates the outputs with a combination of pulse-skipping modulation (PSM) and constant-ON-time pulse-frequency modulation (PFM). To reduce the quiescent power, all the circuit blocks are turned OFF when the outputs are within regulation, except a system clock generator. A newly designed relaxation oscillator provides the main clock of the system, which requires neither reference voltages nor comparators. The frequency of the system clock doubles or halves based on the states of the sources and outputs following a proposed algorithm. The DITOBB converter has been designed and fabricated using 0.18 mu m CMOS process. With a quiescent power of 400 nW, the designed DITOBB converter shows a measured peak efficiency of 83% at 100 mu W output power.

引用

页码：2758 / 2772

页数：15

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