Title :
Optimization of microwatt on-chip charge pump for single-chip solar energy harvesting
Author :
Zhiyuan Chen ; Law, Man-Kay ; Pui-In Mak ; Martins, Rui P.
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. of Macau, Macau, China
Abstract :
In this paper, a compact single-chip solar cell with charge pump for microwatt solar energy harvesting is analyzed. Improved solar energy harvesting efficiency is achieved by utilizing lateral photodiodes. To optimize the charge pump (CP) efficiency in the microwatt level, the switch off-resistance (Roff) and the capacitive switching loss (PC) are analyzed. The optimal flying capacitor size (Cfly) to achieve maximum power transfer is also calculated.
Keywords :
energy harvesting; photodiodes; solar cells; solar power; capacitive switching loss; charge pump efficiency; compact single-chip solar cell; lateral photodiodes; maximum power transfer; microwatt level; microwatt on-chip charge pump optimization; microwatt solar energy harvesting; optimal flying capacitor size; single-chip solar energy harvesting; solar energy harvesting efficiency; switch off-resistance; Switches;
Conference_Titel :
Electron Devices and Solid-State Circuits (EDSSC), 2013 IEEE International Conference of
Conference_Location :
Hong Kong
DOI :
10.1109/EDSSC.2013.6628123
