A 6.78 MHz High-Efficiency Wireless Power Transfer Transmitter With Adaptive Dead-Time Control and Transistor-Width Switching for Implantable Medical Devices

Qiang Wang; Anning Liu; Songping Mai

doi:10.1109/APCCAS55924.2022.10090340

A 6.78 MHz High-Efficiency Wireless Power Transfer Transmitter With Adaptive Dead-Time Control and Transistor-Width Switching for Implantable Medical Devices

Qiang Wang, Anning Liu, Songping Mai

Tsinghua University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

2 Citations (Scopus)

Abstract

A 6.78 MHz wireless power transfer (WPT) transmitter with two calibration schemes, adaptive dead-time control and transistor-width switching, is proposed for power supply of implantable medical devices (IMDs). The adaptive dead-time control scheme with on-time delay compensation for power transistors ensures zero voltage switching (ZVS) operation for the Class-D power amplifier (PA). The transistor-width switching scheme for power stage optimizations improves the transmitter efficiency over an extended loading range. To verify the effectiveness of the two calibration schemes, the transmitter is implemented in a 0.18 μm CMOS process. Simulation results show 15.9% and 3.6% improvement in the transmitter efficiency at the light load and the heavy load respectively. Under the output power range of 0.2 to 2 W, the transmitter efficiency maintains above 92%, and the peak efficiency of 93.2% is achieved when the output power is 0.7 W.

Original language	English
Title of host publication	APCCAS 2022 - 2022 IEEE Asia Pacific Conference on Circuits and Systems
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	77-81
Number of pages	5
ISBN (Electronic)	9781665450737
DOIs	https://doi.org/10.1109/APCCAS55924.2022.10090340
Publication status	Published - 2022
Externally published	Yes
Event	2022 IEEE Asia Pacific Conference on Circuits and Systems, APCCAS 2022 - Virtual, Online, China Duration: 11 Nov 2022 → 13 Nov 2022

Publication series

Name	APCCAS 2022 - 2022 IEEE Asia Pacific Conference on Circuits and Systems

Conference

Conference	2022 IEEE Asia Pacific Conference on Circuits and Systems, APCCAS 2022
Country/Territory	China
City	Virtual, Online
Period	11/11/22 → 13/11/22

Keywords

Class-D power amplifier
adaptive dead-time control
implantable medical devices
transistor-width switching
wireless power transfer

Access to Document

10.1109/APCCAS55924.2022.10090340

Cite this

Wang, Q., Liu, A., & Mai, S. (2022). A 6.78 MHz High-Efficiency Wireless Power Transfer Transmitter With Adaptive Dead-Time Control and Transistor-Width Switching for Implantable Medical Devices. In APCCAS 2022 - 2022 IEEE Asia Pacific Conference on Circuits and Systems (pp. 77-81). (APCCAS 2022 - 2022 IEEE Asia Pacific Conference on Circuits and Systems). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/APCCAS55924.2022.10090340

Wang, Qiang ; Liu, Anning ; Mai, Songping. / A 6.78 MHz High-Efficiency Wireless Power Transfer Transmitter With Adaptive Dead-Time Control and Transistor-Width Switching for Implantable Medical Devices. APCCAS 2022 - 2022 IEEE Asia Pacific Conference on Circuits and Systems. Institute of Electrical and Electronics Engineers Inc., 2022. pp. 77-81 (APCCAS 2022 - 2022 IEEE Asia Pacific Conference on Circuits and Systems).

@inproceedings{c035d77a43964a7f8e47a6f9d07146b2,

title = "A 6.78 MHz High-Efficiency Wireless Power Transfer Transmitter With Adaptive Dead-Time Control and Transistor-Width Switching for Implantable Medical Devices",

abstract = "A 6.78 MHz wireless power transfer (WPT) transmitter with two calibration schemes, adaptive dead-time control and transistor-width switching, is proposed for power supply of implantable medical devices (IMDs). The adaptive dead-time control scheme with on-time delay compensation for power transistors ensures zero voltage switching (ZVS) operation for the Class-D power amplifier (PA). The transistor-width switching scheme for power stage optimizations improves the transmitter efficiency over an extended loading range. To verify the effectiveness of the two calibration schemes, the transmitter is implemented in a 0.18 μm CMOS process. Simulation results show 15.9% and 3.6% improvement in the transmitter efficiency at the light load and the heavy load respectively. Under the output power range of 0.2 to 2 W, the transmitter efficiency maintains above 92%, and the peak efficiency of 93.2% is achieved when the output power is 0.7 W.",

keywords = "Class-D power amplifier, adaptive dead-time control, implantable medical devices, transistor-width switching, wireless power transfer",

author = "Qiang Wang and Anning Liu and Songping Mai",

note = "Publisher Copyright: {\textcopyright} 2022 IEEE.; 2022 IEEE Asia Pacific Conference on Circuits and Systems, APCCAS 2022 ; Conference date: 11-11-2022 Through 13-11-2022",

year = "2022",

doi = "10.1109/APCCAS55924.2022.10090340",

language = "English",

series = "APCCAS 2022 - 2022 IEEE Asia Pacific Conference on Circuits and Systems",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

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}

Wang, Q, Liu, A & Mai, S 2022, A 6.78 MHz High-Efficiency Wireless Power Transfer Transmitter With Adaptive Dead-Time Control and Transistor-Width Switching for Implantable Medical Devices. in APCCAS 2022 - 2022 IEEE Asia Pacific Conference on Circuits and Systems. APCCAS 2022 - 2022 IEEE Asia Pacific Conference on Circuits and Systems, Institute of Electrical and Electronics Engineers Inc., pp. 77-81, 2022 IEEE Asia Pacific Conference on Circuits and Systems, APCCAS 2022, Virtual, Online, China, 11/11/22. https://doi.org/10.1109/APCCAS55924.2022.10090340

A 6.78 MHz High-Efficiency Wireless Power Transfer Transmitter With Adaptive Dead-Time Control and Transistor-Width Switching for Implantable Medical Devices. / Wang, Qiang; Liu, Anning; Mai, Songping.
APCCAS 2022 - 2022 IEEE Asia Pacific Conference on Circuits and Systems. Institute of Electrical and Electronics Engineers Inc., 2022. p. 77-81 (APCCAS 2022 - 2022 IEEE Asia Pacific Conference on Circuits and Systems).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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T1 - A 6.78 MHz High-Efficiency Wireless Power Transfer Transmitter With Adaptive Dead-Time Control and Transistor-Width Switching for Implantable Medical Devices

AU - Wang, Qiang

AU - Liu, Anning

AU - Mai, Songping

PY - 2022

Y1 - 2022

N2 - A 6.78 MHz wireless power transfer (WPT) transmitter with two calibration schemes, adaptive dead-time control and transistor-width switching, is proposed for power supply of implantable medical devices (IMDs). The adaptive dead-time control scheme with on-time delay compensation for power transistors ensures zero voltage switching (ZVS) operation for the Class-D power amplifier (PA). The transistor-width switching scheme for power stage optimizations improves the transmitter efficiency over an extended loading range. To verify the effectiveness of the two calibration schemes, the transmitter is implemented in a 0.18 μm CMOS process. Simulation results show 15.9% and 3.6% improvement in the transmitter efficiency at the light load and the heavy load respectively. Under the output power range of 0.2 to 2 W, the transmitter efficiency maintains above 92%, and the peak efficiency of 93.2% is achieved when the output power is 0.7 W.

AB - A 6.78 MHz wireless power transfer (WPT) transmitter with two calibration schemes, adaptive dead-time control and transistor-width switching, is proposed for power supply of implantable medical devices (IMDs). The adaptive dead-time control scheme with on-time delay compensation for power transistors ensures zero voltage switching (ZVS) operation for the Class-D power amplifier (PA). The transistor-width switching scheme for power stage optimizations improves the transmitter efficiency over an extended loading range. To verify the effectiveness of the two calibration schemes, the transmitter is implemented in a 0.18 μm CMOS process. Simulation results show 15.9% and 3.6% improvement in the transmitter efficiency at the light load and the heavy load respectively. Under the output power range of 0.2 to 2 W, the transmitter efficiency maintains above 92%, and the peak efficiency of 93.2% is achieved when the output power is 0.7 W.

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KW - transistor-width switching

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T3 - APCCAS 2022 - 2022 IEEE Asia Pacific Conference on Circuits and Systems

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BT - APCCAS 2022 - 2022 IEEE Asia Pacific Conference on Circuits and Systems

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T2 - 2022 IEEE Asia Pacific Conference on Circuits and Systems, APCCAS 2022

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ER -

Wang Q, Liu A, Mai S. A 6.78 MHz High-Efficiency Wireless Power Transfer Transmitter With Adaptive Dead-Time Control and Transistor-Width Switching for Implantable Medical Devices. In APCCAS 2022 - 2022 IEEE Asia Pacific Conference on Circuits and Systems. Institute of Electrical and Electronics Engineers Inc. 2022. p. 77-81. (APCCAS 2022 - 2022 IEEE Asia Pacific Conference on Circuits and Systems). doi: 10.1109/APCCAS55924.2022.10090340

A 6.78 MHz High-Efficiency Wireless Power Transfer Transmitter With Adaptive Dead-Time Control and Transistor-Width Switching for Implantable Medical Devices

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Keywords

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