充电泵
光伏系统
电气工程
电压
电容器
电流(流体)
电子线路
工程类
电子工程
计算机科学
作者
Daniel S. Truesdell,James Boley,Atul Wokhlu,Alain Gravel,David D. Wentzloff,Benton H. Calhoun
出处
期刊:IEEE Transactions on Circuits and Systems I-regular Papers
[Institute of Electrical and Electronics Engineers]
日期:2023-11-01
卷期号:70 (11): 4334-4345
标识
DOI:10.1109/tcsi.2023.3306308
摘要
This article presents modeling and design optimization of switched-capacitor charge pumps for use as cold-start circuits in photovoltaic energy harvesters. For a successful cold-start from photovoltaic energy, a certain output voltage and current must be generated by the charge pump while jointly minimizing the required input voltage and current from the energy harvesting source. We model the operation of the cold-start charge pump including its oscillator, derive expressions for required input voltage and current based on output requirements, and demonstrate a Pareto-optimal design space that defines the tradeoff between the required input voltage and current to achieve cold-start. We then assess the impacts of process and temperature variation, and suggest a general design methodology for cold-start charge pump circuits. Finally, we validate models with measurements from a design fabricated in 55nm CMOS.
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