A high voltage multiplexer with rail to rail output swing for battery management system applications

IEICE Electronics Express

Xinchang Li¹  Hongyue Zhu¹  Yuehui Yu¹  Zhiqiang Yang¹  Dawei Xu²  Zhuojun Chen²  Xinhong Cheng²  Wai Tung Ng² 

[1] Graduate University of Chinese Academy of Sciences;State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences

关键词: multiplexer;    switch;    rail-to-rail output;    high voltage;    back to back protection;   

DOI  :  10.1587/elex.13.20161144

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

This work presents a dual channel 81 high voltage (HV) multiplexer (MUX) with a 3-to-8 decoder and 16 HV switches for Battery Management Systems (BMS). Each HV switch consists of two pairs of sub-switches using n- and p-channel drain extended MOS devices with back to back body diode protection, respectively. The two pairs of sub-switches, connected in parallel and with dedicated gate drive signals, allow the HV MUX to have a rail-to-rail output swing and improved sampling accuracy. An experimental prototype is implemented using a 0.35 µm 60 V BCD process. The measurement results reveal that the maximum error of the HV MUX is ±0.2 mV, and the power dissipation is below 2.3 mW with a chip area of only 1.9 × 0.57 mm2.

【 授权许可】

CC BY