Work

An Inductive Voltage-/Current-Mode Integrated Power Management With Seamless Mode Transition and Energy Recycling

Year: 2018

Type: article

Abstract: An integrated power management (IPM) with the unique capabilities of seamless-voltage-/current-mode (SVCM) operation and energy recycling is presented for robust inductive power delivery. Utilizing parasitic bulk diodes with lower voltage drop, this IPM seamlessly transitions between voltage mode (VM) and current mode (CM) in a safe and robust fashion, extending the input-voltage range (removing dead zone) and significantly improving power-conversion efficiency (PCE) in CM operation. The IPM first provides the required load power (PL) by one-step rectification/regulation, and then stores the surplus energy into a storage capacitor to extend the receiver (Rx) operation time via energy recycling when the input power is insufficient. The theory behind the energy recycling is presented. A proof-of-concept chip was fabricated in a 0. 35-μm CMOS process. In measurements, the chip safely achieved a regulated voltage of 3 V for a wide input-voltage range (without dead zone) by switching the Rx LC-tank at 142 kHz. With zero input power, the chip extended the Rx operation time by 250% thanks to the energy recycling.

Source: IEEE Journal of Solid-State Circuits

DOI: 10.1109/jssc.2018.2884322

Authors: Hesam Sadeghi Gougheri, Mehdi Kiani

Institution: Pennsylvania State University

Language: English

Topic: Wireless Power Transfer Systems

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Industry, innovation and infrastructure, Affordable and clean energy

Open Access status: green

Funders: National Institutes of Health, National Institute of Biomedical Imaging and Bioengineering