Design and implementation of a high-efficiency 6.78 MHz resonant wireless power transfer system with a 5 W fully integrated power receiver

Junil Moon, Hyeonseok Hwang, Byeonghak Jo, Chan Keun Kwon, Tae Geun Kim, Soo-Won Kim

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

This study presents the design and implementation of a 6.78 MHz wireless power transfer (WPT) system that uses magnetically coupled resonance for 5 W mobile phone charger applications. For a resonant WPT system, one of the most significant design issues is the power receiver because of its resonant characteristics. A compact resonant-type power receiver is required for high efficiency and robustness. To realise a compact size, a fully integrated 5 W power receiver that includes an on-chip AC-DC converter and a DC-DC converter is implemented. A protection circuit that operates only during initial power-up is proposed to protect the power switches in the receiver. The proposed receiver was implemented using a 0.18 μm bipolar-complementary metal-oxide-semiconductor-double-diffused metal-oxide-semiconductor process with a die area of 3.5 mm × 3.5 mm. The measured maximum power transfer efficiency of the receiver and peak efficiency of the system was 81 and 51%, respectively.

Original languageEnglish
Pages (from-to)577-587
Number of pages11
JournalIET Power Electronics
Volume10
Issue number5
DOIs
Publication statusPublished - 2017 Apr 21

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DC-DC converters
Metals
Mobile phones
Switches
Networks (circuits)
Oxide semiconductors

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Design and implementation of a high-efficiency 6.78 MHz resonant wireless power transfer system with a 5 W fully integrated power receiver. / Moon, Junil; Hwang, Hyeonseok; Jo, Byeonghak; Kwon, Chan Keun; Kim, Tae Geun; Kim, Soo-Won.

In: IET Power Electronics, Vol. 10, No. 5, 21.04.2017, p. 577-587.

Research output: Contribution to journalArticle

Moon, Junil ; Hwang, Hyeonseok ; Jo, Byeonghak ; Kwon, Chan Keun ; Kim, Tae Geun ; Kim, Soo-Won. / Design and implementation of a high-efficiency 6.78 MHz resonant wireless power transfer system with a 5 W fully integrated power receiver. In: IET Power Electronics. 2017 ; Vol. 10, No. 5. pp. 577-587.
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