High Voltage CMOS Bidirectional Current Sensor for Battery Moniroring in Portable Devices

Chua Chin Wang, Pang Yen Lou, Hsiu Chun Tsai, Zong You Hou, Yi Jen Chiu, Yu Cheng Lin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This investigation demonstrates a high-accuracy bidirectional high-voltage (HV) current sensor fabricated by CMOS technology. Besides Noise filter, Sense stage, and Controller, the proposed current sensor is featured with a Switching Network composed of transmission gates, which is able to steer the direction of the current. A digital feedback loop comprises Controller generating a pair of digital signals to Switching Network such that the direction of the current is detected real time. The area of the proposed sensor on silicon is 1173×664 um2 using 0.5 um high-voltage CMOS process, which is very compact to be easily integrated in any portable devices demanding a current monitoring function. The sensing voltage error is 0.7 % by the physical measurements, where the input voltage range is 814 V, and the current sensing range is -3 3 A.

Original languageEnglish
Title of host publication2020 IEEE 15th International Conference on Solid-State and Integrated Circuit Technology, ICSICT 2020 - Proceedings
EditorsShaofeng Yu, Xiaona Zhu, Ting-Ao Tang
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728162355
DOIs
Publication statusPublished - 2020 Nov 3
Event15th IEEE International Conference on Solid-State and Integrated Circuit Technology, ICSICT 2020 - Virtual, Kunming, China
Duration: 2020 Nov 32020 Nov 6

Publication series

Name2020 IEEE 15th International Conference on Solid-State and Integrated Circuit Technology, ICSICT 2020 - Proceedings

Conference

Conference15th IEEE International Conference on Solid-State and Integrated Circuit Technology, ICSICT 2020
Country/TerritoryChina
CityVirtual, Kunming
Period20-11-0320-11-06

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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