Sunlight-variation-adaptive charge pump circuit with self-reconfiguration for small-scale solar energy harvesting

IEICE Electronics Express

Kyeong-Sik Min¹  Jeong-Heon Kim¹  Jun-Myung Choi¹  Seok-Jin Ham¹  Sang-Don Byeon¹  Young-Su Kim¹  Eun-Sub Lee¹ 

[1] School of Electrical Engineering, Kookmin University

关键词: sunlight-variation-adaptive;    reconfigurable charge pump;    solar energy harvesting;    solar battery charger;   

DOI  :  10.1587/elex.9.1423

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(14)Cited-By(1)In this paper, we propose a reconfigurable charge pump (RCP) circuit that could change its architecture according to sunlight variation. In strong sunlight, the RCP works by the parallel mode that can maximize the output current. In moderate sunlight, the RCP changes to the serial-parallel mode. When sunlight becomes weak, the RCP runs by the serial mode to keep its output voltage around the target voltage. Compared with the fixed-mode circuit that maintains the serial mode all the time regardless of sunlight variation, the RCP can generate 2.5 times larger output current and has power efficiency better by 24%, in strong sunlight. The area penalty and overhead in power efficiency of the RCP are only 15.8% and 1.2%.

【 授权许可】

Unknown