US 12,230,980 B1
Wireless power transfer with integrated communications
Ye Li, Sunnyvale, CA (US); Gianpaolo Lisi, Santa Clara, CA (US); Bingyao Sun, Santa Clara, CA (US); Liang Chen, Auckland (NZ); Gaurav Kalra, Auckland (NZ); Rohan Dayal, Daly City, CA (US); and Stephen C. Terry, San Jose, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Sep. 20, 2021, as Appl. No. 17/448,155.
Claims priority of provisional application 63/216,831, filed on Jun. 30, 2021.
Int. Cl. H02J 50/80 (2016.01); H02J 50/12 (2016.01)
CPC H02J 50/80 (2016.02) [H02J 50/12 (2016.02)] 21 Claims
OG exemplary drawing
 
1. A wireless power transmitter comprising:
a wireless power transfer coil;
an inverter coupled to the wireless power transfer coil; and
control circuitry coupled to the inverter that, responsive to receiving a burst request pulse from a wireless power receiver, initiates operation of the inverter to drive the wireless power transfer coil, thereby delivering power to the wireless power receiver;
wherein the control circuitry operates one or more switching devices of the inverter to communicate information to the wireless power receiver by
controlling a delay between receipt of the burst request pulse and initiating operation of the inverter.