Design of a 5-W power receiver for 6.78 MHz resonant wireless power transfer system with power supply switching circuit

Junil Moon; Hyeonseok Hwang; Byeonghak Jo; Hee Am Shin; Soo Won Kim

doi:10.1109/TCE.2016.7838086

Design of a 5-W power receiver for 6.78 MHz resonant wireless power transfer system with power supply switching circuit

Junil Moon, Hyeonseok Hwang, Byeonghak Jo, Hee Am Shin, Soo Won Kim

Honorary professors

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

A 6.78 MHz resonant wireless power transfer (WPT) system with a 5 W fully integrated power receiver is presented. A conventional low-dropout (LDO) linear regulator supplies power for operating the circuit in the power receiver. However, as the required operating current increases, the power consumption of the LDO regulator increases, which degrades the power efficiency. In order to increase the power efficiency of the receiver, this work proposes a power supply switching circuit (PSSC). When operation starts, the PSSC changes the power source from the low-efficiency LDO regulator to the high-efficiency step-down DC-DC converter. The LDO regulator operates only for initialization. This chip has been fabricated using 0.18 μm high-voltage bipolar- CMOS-DMOS (double-diffused metal-oxide-semiconductor) (BCD) technology with a die area of 2.5 mm × 2.5 mm. A maximum power transfer efficiency of 81% is measured.

Original language	English
Article number	7838086
Pages (from-to)	349-354
Number of pages	6
Journal	IEEE Transactions on Consumer Electronics
Volume	62
Issue number	4
DOIs	https://doi.org/10.1109/TCE.2016.7838086
Publication status	Published - 2016 Nov

Keywords

A4WP
Wireless power transfer system
resonant coupling
wireless power receiver

ASJC Scopus subject areas

Media Technology
Electrical and Electronic Engineering

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title = "Design of a 5-W power receiver for 6.78 MHz resonant wireless power transfer system with power supply switching circuit",

abstract = "A 6.78 MHz resonant wireless power transfer (WPT) system with a 5 W fully integrated power receiver is presented. A conventional low-dropout (LDO) linear regulator supplies power for operating the circuit in the power receiver. However, as the required operating current increases, the power consumption of the LDO regulator increases, which degrades the power efficiency. In order to increase the power efficiency of the receiver, this work proposes a power supply switching circuit (PSSC). When operation starts, the PSSC changes the power source from the low-efficiency LDO regulator to the high-efficiency step-down DC-DC converter. The LDO regulator operates only for initialization. This chip has been fabricated using 0.18 μm high-voltage bipolar- CMOS-DMOS (double-diffused metal-oxide-semiconductor) (BCD) technology with a die area of 2.5 mm × 2.5 mm. A maximum power transfer efficiency of 81% is measured.",

keywords = "A4WP, Wireless power transfer system, resonant coupling, wireless power receiver",

author = "Junil Moon and Hyeonseok Hwang and Byeonghak Jo and Shin, {Hee Am} and Kim, {Soo Won}",

note = "Funding Information: This work was supported by a grant from the Korea Evaluation Institute of Industrial Technology (KEIT) funded by the Korean government (MOTIE) (10045400, HF-Band Magnetic Resonant Wireless Charging SoC for Mobile Device).",

year = "2016",

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doi = "10.1109/TCE.2016.7838086",

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AU - Moon, Junil

AU - Hwang, Hyeonseok

AU - Jo, Byeonghak

AU - Shin, Hee Am

AU - Kim, Soo Won

N1 - Funding Information: This work was supported by a grant from the Korea Evaluation Institute of Industrial Technology (KEIT) funded by the Korean government (MOTIE) (10045400, HF-Band Magnetic Resonant Wireless Charging SoC for Mobile Device).

PY - 2016/11

Y1 - 2016/11

N2 - A 6.78 MHz resonant wireless power transfer (WPT) system with a 5 W fully integrated power receiver is presented. A conventional low-dropout (LDO) linear regulator supplies power for operating the circuit in the power receiver. However, as the required operating current increases, the power consumption of the LDO regulator increases, which degrades the power efficiency. In order to increase the power efficiency of the receiver, this work proposes a power supply switching circuit (PSSC). When operation starts, the PSSC changes the power source from the low-efficiency LDO regulator to the high-efficiency step-down DC-DC converter. The LDO regulator operates only for initialization. This chip has been fabricated using 0.18 μm high-voltage bipolar- CMOS-DMOS (double-diffused metal-oxide-semiconductor) (BCD) technology with a die area of 2.5 mm × 2.5 mm. A maximum power transfer efficiency of 81% is measured.

AB - A 6.78 MHz resonant wireless power transfer (WPT) system with a 5 W fully integrated power receiver is presented. A conventional low-dropout (LDO) linear regulator supplies power for operating the circuit in the power receiver. However, as the required operating current increases, the power consumption of the LDO regulator increases, which degrades the power efficiency. In order to increase the power efficiency of the receiver, this work proposes a power supply switching circuit (PSSC). When operation starts, the PSSC changes the power source from the low-efficiency LDO regulator to the high-efficiency step-down DC-DC converter. The LDO regulator operates only for initialization. This chip has been fabricated using 0.18 μm high-voltage bipolar- CMOS-DMOS (double-diffused metal-oxide-semiconductor) (BCD) technology with a die area of 2.5 mm × 2.5 mm. A maximum power transfer efficiency of 81% is measured.

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KW - wireless power receiver

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Design of a 5-W power receiver for 6.78 MHz resonant wireless power transfer system with power supply switching circuit

Abstract

Keywords

ASJC Scopus subject areas

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