Energy-Efficient Power Management Designs for Inductive Wireless Power Transfer

In recent years, wireless power transfer (WPT) has been widely used to charge smartphones, smart watches, biomedical implants, and other portable electronic devices. Despite the recent advances, WPT still shows disadvantages on energy efficiency, peak power and delivery distance.

Recent research on WPT has shown good energy efficiency and simultaneous data transfer [1]. However, the delivered power and data transfer rate is still low. Besides, the power delivery mode is non-configurable to be compatible with different applications, and different locations and directions of the WPT receivers. Furthermore, the miniaturization of the receiver is limited by off-chip components.

In this project, we are going to design a WPT receiver IC for biomedical implants, which enables high energy efficiency, simultaneous data transfer, ultra-low power consumption and adaptive power delivery for different charging distances. The proposed WPT receiver does not contain any off-chip component, except the RX coil.

[1] S. Hong, "32.1 A 13.56MHz Current-Mode Wireless Power and Data Receiver with Efficient Power Extracting Controller and Energy-Shift Keying Technique for Loosely Coupled Implantable Devices," 2020 ISSCC, pp. 486-488,

Assignment

1. Literature review of inductive WPT topologies and associated power management circuits.
2. Design of a fully integrated CMOS circuit for the proposed WPT receiver. Tape-out is possible depending on the design and available time.

Requirements

Student should be familiar with analog IC design and Cadence environment.

Contact

dr. Sijun Du

Electronic Instrumentation Group

Department of Microelectronics

Last modified: 2021-11-11