A Triple-Mode Wireless Power-Receiving Unit With 85.5% System Efficiency for A4WP, WPC, and PMA Applications

作者：Park Young Jun; Jang ByeongGi; Park Seong Mun; Ryu Ho Cheol; Oh Seong Jin; Kim Sang Yun; Pu YoungGun; Yoo Sang Sun; Hwang Keum Cheol; Yang Youngoo; Lee Minjae; Lee Kang Yoon^*

来源：IEEE Transactions on Power Electronics, 2018, 33(4): 3141-3156.

DOI：10.1109/TPEL.2017.2703153

• Active rectifier
• Alliance for Wireless Power (A4WP)
• delay compensation
• magnetic induction
• magnetic resonance
• Power Matters Alliance (PMA)
• wireless power-receiving unit
• Wireless Power Consortium (WPC)

This paper presents the design of a triple-mode wireless power-receiving unit (TWPRU) for battery charger with high efficiency. The TWPRU is proposed based on Alliance for Wireless Power (A4WP), Wireless Power Consortium (WPC), and Power Matters Alliance (PMA) standards. An adaptive alignment gate controller technique is proposed in the triple-mode active rectifier to block the reverse leakage current and improve the power conversion efficiency (PCE). This technique can compensate for the delays in the gate control signals of the main switching MOSFETs at different operating frequencies for A4WP, WPC, and PMA. The dead time of a dc-dc converter is optimally determined depending on the voltage and the temperature variations by phase calibration circuit. This chip with an active area of 5.0 mm x 3.5 mm is implemented in 0.18-mu m BCD technology. The maximum PCEs of the triple-mode active rectifier are 91.7% in the A4WP mode and 92.7% in the WPC/PMA mode, respectively. The maximum PCE of the dc-dc converter is 92.3% at a load current of 500 mA, while the system efficiencies of TWPRU at A4WP and WPC/PMA modes are about 84.5% and 85.5%, respectively.

• 出版日期2018-4