Dual Protocol Wireless Power System

A wireless power transmitting device, comprising:

• control circuitry including wireless transceiver circuitry;
• and
• wireless power transmitting circuitry including a configured to be driven with alternating-current signals at a frequency, wherein the control circuitry is configured to:
• use the wireless power transmitting circuitry to begin transmitting wireless power;
• after transmitting the wireless power for a first time period, use the wireless transceiver circuitry to transmit a frequency-shift-keying packet with the coil by modulating the frequency using frequency-shift keying modulation;
• and
• in response to receiving an amplitude-shift-keying response to the frequency-shift-keying packet with the wireless transceiver circuitry and the coil within a second time period following transmission of the frequency-shift-keying packet, use the wireless transceiver circuit to transmit an address with the coil.

A wireless power system, comprising:

• a wireless power transmitting device having a coil and configured to:
• transmit wireless power with the coil;
• after transmitting the wireless power for a first time period, transmit an in-band frequency-shift-keying packet using the coil;
• after transmitting the in-band frequency-shift-keying packet, monitor for in-band amplitude-shift-keying response packets for a second time period;
• a first wireless power receiving device that is configured to transmit an amplitude-shift-keying response packet in response to the frequency-shift-keying packet in accordance with a first wireless charging communications protocol;
• and
• a second wireless power receiving device that is configured to not transmit any amplitude-shift-keying responses in response to the frequency-shift-keying packet in accordance with a second wireless charging communications protocol that is different than the first wireless charging communications protocol.