A Wireless Power Receiver With Active Detuning For Charger Authentication And Dynamic Power Balancing

As wireless charging becomes more commonplace for IoT devices, several scale-related issues need to be addressed. This chip implements the capability for a near-field, resonant wireless power receiver to detune itself (i.e. move its resonant frequency away) from the charger without the use of any switched passive component arrays. Detuning can be used to protect the receiver against harmful transients imposed by counterfeit wireless chargers, which are expected to become more prevalent the same way as counterfeit wired chargers are currently. In addition, a receiver can detune itself to allow more power to be delivered to a farther receiver coupled to the same charger.