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 language | English |
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Title of host publication | 2022 IEEE International Solid- State Circuits Conference (ISSCC) |
Subtitle of host publication | Digest of technical papers |
Editors | Laura C. Fujino |
Place of Publication | Danvers |
Publisher | IEEE |
Pages | 66-68 |
Number of pages | 3 |
ISBN (Electronic) | 978-1-6654-2800-2 |
ISBN (Print) | 978-1-6654-2801-9 |
DOIs | |
Publication status | Published - 2022 |
Event | 2022 IEEE International Solid- State Circuits Conference (ISSCC) - Online at San Francisco, United States Duration: 20 Feb 2022 → 26 Feb 2022 |
Publication series
Name | Digest of Technical Papers - IEEE International Solid-State Circuits Conference |
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Volume | 2022-February |
ISSN (Print) | 0193-6530 |
Conference
Conference | 2022 IEEE International Solid- State Circuits Conference (ISSCC) |
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Abbreviated title | ISSCC 2022 |
Country/Territory | United States |
City | Online at San Francisco |
Period | 20/02/22 → 26/02/22 |
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-careOtherwise 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.