A thermal protection circuit for fast battery charging LDOs

IEICE Electronics Express

article

Zhiming Xiao¹  Zhiyun Zhao¹  Yue Zhao¹  Weibo Hu¹  Feng Luo¹  Junzhong Yang²  Sen Yang²  Jindong Xu²  Lin Huang² 

[1] College of Electronic Information and Optical Engineering, Nankai University;State Grid Taizhou Power Supply Company

关键词: LDO;    thermal protection;    battery load;    system safety;    fast charging process;   

DOI  :  10.1587/elex.19.20220398

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

This paper presents a novel thermal protection circuit for low dropout regulators (LDOs). To avoid thermal damage under high power conditions, the output current of LDOs varies with the sensed load temperature. Both the current delivery capability at a pre-set temperature and the limit slope of load current can be tuned to accommodate different load conditions and temperatures. The proposed design was fabricated with a 0.18µm CMOS process with a chip area of 0.073mm2. Chip measurement results show that the proposed design reduces charging time by 18% over the conventional thermal shutdown structure.

【 授权许可】

CC BY