A Multi-Source Energy-Harvesting Power Management System with a Single Shared Inductor

被引：0
作者：
Wei, Baolin [1 ]
Liang, Zhanrong [1 ]
Xu, Weilin [1 ]
Wei, Xueming [1 ]
Duan, Jihai [1 ]
机构：
[1] Guilin Univ Elect Technol, Guangxi Key Lab Precis Nav Technol & Applicat, Guilin 541004, Guangxi, Peoples R China
来源：
JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS | 2024年 / 33卷 / 18期
基金：
中国国家自然科学基金;
关键词：
Battery-less multi-source energy-harvesting system; DC-DC converter; self-start; maximum power point tracking (MPPT); adaptive asynchronous control; NANOGENERATOR; VIBRATION; INTERFACE; SOLAR;
D O I：
10.1142/S021812662550015X
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
A single-inductor multi-source energy harvesting system that can harvest three types of ambient energy was presented. The system can self-supply using an integrated self-starting circuit that does not require an external battery. It performs hybrid modulation of pulse-frequency modulation (PFM) and pulse-width modulation (PWM) and realizes adaptive asynchronous control for input and output, achieving higher system stability and better energy aggregation. Adaptive maximum power point tracking (MPPT) was implemented to generate inductor charging control signals with different frequencies and duty cycles according to different input sources, enabling the inductor to operate in discontinuous mode (DCM) under different input conditions. The energy harvesting system was designed using a 0.18-mu m CMOS process. The simulation results show that the system can realize low-voltage self-startup as low as 200mV and can provide a stable output of 1.4V to the load with a 1V harvested voltage to self-supply. The highest conversion efficiency of the system is 76.43%@R-load=10k Omega, and the average power consumption in sleep mode is 2.38 mu W.
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页数：20
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