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A highly integrated one cell battery management chip for wearables

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Abstract

Herein is presented a battery management chip without external charging and discharging MOSFETs that promotes the miniaturization of wearable devices and reducing the size of battery management system on printed circuit boards (PCBs). The battery management chip is designed to integrate the discrete charging and discharging MOSFETs into the chip, even removing current sense resistor significantly. Using the proposed adaptive substrate selecting (ASS) technology, the same protection function of the traditional battery management chip is realized, which greatly saves the area cost of the chip. Based on the 0.18 μm 5 V process, the circuit and the switch have been integrated into a single lithium battery management chip. The measurements show that the chip can reliably protect the battery from overvoltage, under voltage and overcurrent with low power consumption.

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Data Availability

The datasets analyzed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

This research was sponsored by Joint Foundation of Key Laboratory of Shanghai Jiao Tong University-Xidian University, Ministry of Education under Grant LHJJ/2020-05.

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Authors and Affiliations

  1. School of Microelectronics, Xi’an Jiaotong University, 710049, Xi’an, Shaanxi, China

    Kai-Kai Wu, Hong-Yi Wang, Chen Chen & Tao Tao

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  1. Kai-Kai Wu
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  2. Hong-Yi Wang
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  3. Chen Chen
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Correspondence to Hong-Yi Wang.

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Wu, KK., Wang, HY., Chen, C. et al. A highly integrated one cell battery management chip for wearables. Analog Integr Circ Sig Process 113, 393–401 (2022). https://doi.org/10.1007/s10470-022-02101-3

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  • DOI: https://doi.org/10.1007/s10470-022-02101-3

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