A ±25A Versatile Shunt-Based Current Sensor with 10kHz Bandwidth and ±0.25% Gain Error from -40°C to 85°C Using 2-Current Calibration

Zhong Tang, Roger Zamparette, Yoshikazu Furuta, Tomohiro Nezuka, Kofi A.A. Makinwa

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

Accurate current sensing is critical in many industrial applications, such as battery management and motor control. Precise shunt-based current sensors have been reported with gain errors of less than 1% over the industrial temperature range (-40°C to 85°C) [1]–[4]. However, since they are intended for coulomb counting, their bandwidth is limited to a few tens of Hz, making them unsuitable for battery impedance or motor-current sensing. This paper presents a current sensor with a wide (10kHz) bandwidth and a tunable temperature compensation scheme (TCS), which allows it to be flexibly used with different types of shunts while maintaining high accuracy. A low-cost room-temperature calibration scheme is proposed to optimize gain flatness over temperature by exploiting the shunt's self-heating at large currents. Over the industrial temperature range and a ±25A current range, it achieves state-of-the-art gain error (±0.25%) with both low-cost PCB and stable metal-alloy shunts.
Original languageEnglish
Title of host publication2022 IEEE International Solid- State Circuits Conference (ISSCC)
Subtitle of host publicationDigest of technical papers
EditorsLaura C. Fujino
Place of PublicationDanvers
PublisherIEEE
Pages66-68
Number of pages3
ISBN (Electronic)978-1-6654-2800-2
ISBN (Print)978-1-6654-2801-9
DOIs
Publication statusPublished - 2022
Event2022 IEEE International Solid- State Circuits Conference (ISSCC) - Online at San Francisco, United States
Duration: 20 Feb 202226 Feb 2022

Publication series

NameDigest of Technical Papers - IEEE International Solid-State Circuits Conference
Volume2022-February
ISSN (Print)0193-6530

Conference

Conference2022 IEEE International Solid- State Circuits Conference (ISSCC)
Abbreviated titleISSCC 2022
Country/TerritoryUnited States
CityOnline at San Francisco
Period20/02/2226/02/22

Bibliographical note

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

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