Intel Corporation
Wireless charger topology systems and methods

Abstract:

Wireless charging of electronic devices often requires active adjustment of impedance and power level during charging. Technical solutions described herein provide systems and methods for adjusting the impedance measured at the power amplifier according to the output power level. In particular, the power amplifier impedance decreases as the power output increases, and the power amplifier impedance increases as the power output decreases. In an embodiment, the impedance adjustment includes the addition of a phase shifter.