Wide input range,high-efficiency magnetic resonant wireless power receiver |
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Authors: | Yeon-Kug Moon Hyung-Gu Park Hongjin Kim Honey Durga Tiwari Suki Kim |
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Affiliation: | 1. Department of Biomicrosystem Technology, Korea University, Seoul, Korea;2. College of Information and Communication Engineering, Sungkyunkwan University, Suwon 440-746, Korea |
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Abstract: | This article presents a full-CMOS receiver for magnetic resonant wireless battery charging system. A wide-input range CMOS multi-mode active rectifier is proposed for a magnetic resonant wireless battery charging system. The configuration is automatically changed with respect to the magnitude of the input AC voltage. The output voltage of the multi-mode rectifier is sensed by a comparator. Furthermore, the configuration of the multi-mode rectifier is automatically selected by switches as original rectifier mode, one-stage voltage multiplier or two-stage voltage multiplier mode. As a result, a rectified DC output voltage is from 7.5 to 19 V for an input AC voltage of 5–20 V. This chip is implemented using 0.35 μm BCD technology with an active area of around 5 × 2.5 mm2. When the magnitude of the input AC voltage is 10 V, the power conversion efficiency of the multi-mode active rectifier is about 94%.The efficiency of the receiver is about 60% when the distance between the transmitter and receiver is about 1 m. |
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Keywords: | multi-mode active rectifier receiver magnetic resonant wireless battery charging |
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