公开(公告)号：US12230980B1

公开(公告)日：2025-02-18

申请号：US17448155

申请日：2021-09-20

Applicant: Apple Inc.

Inventor： Ye Li ,  Gianpaolo Lisi ,  Bingyao Sun ,  Liang Chen ,  Gaurav Kalra ,  Rohan Dayal ,  Stephen C. Terry

IPC: H02J50/80 ,  H02J50/12

Abstract: A wireless power system can include a wireless power transmitter and a wireless power receiver. The transmitter can include a transmit coil, an inverter, and inverter control circuitry that can operate one or more switching devices of the inverter to communicate information to the receiver by controlling a delay between receipt of the burst request pulse and initiating operation of the inverter and/or controlling a polarity of a first pulse of the inverter. The receiver can include a receive coil magnetically coupled to the transmit coil, a rectifier, and rectifier control circuitry that initiates a burst request pulse to initiate operation of a transmitter. The rectifier control circuitry can operate one or more switching devices of the rectifier to communicate information to the transmitter by at least one of short circuiting an LC tank including the receive coil or controlling a polarity of the burst request pulse.