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2019 | OriginalPaper | Buchkapitel

15. A Low-Power, High-Resolution ZCS Control for Inductor-Based Converters

verfasst von : Mohammad Alhawari, Baker Mohammad, Hani Saleh, Mohammed Ismail

Erschienen in: The IoT Physical Layer

Verlag: Springer International Publishing

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Abstract

This chapter presents an improved zero current switching (ZCS) control for high-gain inductor-based DC-DC converter targeting thermoelectric generator (TEG) for wearable electronics. The proposed ZCS control is an all-digital circuit that utilizes a simple finite state machine (FSM) and a 3-bit counter to locate the zero current point. In addition, an efficient push-pull circuit along with delay capacitance banks is used to tune the delay near the zero current point to reduce the estimated error. The proposed control circuit achieves 56 delay steps using 3 control bits while having a high resolution, which helps in maintaining the efficiency of the converter. The prototype chip is fabricated in 65 nm CMOS and occupies an area of less than 0.04 mm\(^{2}\). Measured results of the converter confirm 81\(\%\) peak efficiency at 55 \(\upmu \)W output power and 50 mV input voltage.

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Metadaten
Titel
A Low-Power, High-Resolution ZCS Control for Inductor-Based Converters
verfasst von
Mohammad Alhawari
Baker Mohammad
Hani Saleh
Mohammed Ismail
Copyright-Jahr
2019
DOI
https://doi.org/10.1007/978-3-319-93100-5_15

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