Wireless charging with split resonant capacitors
An example device includes a plurality of capacitor and wireless charging coil series pairs that are collectively in parallel; and one or both of: a driver circuit configured to drive the plurality of capacitor and wireless charging coil series pairs with a first common signal; or a sink circuit configured to receive a second common signal from the plurality of capacitor and wireless charging coil series pairs.
1 . A wireless charging sink device comprising:
a plurality of capacitor and wireless charging coil series pairs that are collectively in parallel; and
a sink circuit configured to receive a second common signal from the plurality of capacitor and wireless charging coil series pairs.
2 . The wireless charging sink device of claim 1 , wherein each of the wireless charging coils comprises a respective bundle of wires.
3 . The wireless charging sink device of claim 2 , wherein each of the respective bundles of wires comprises one of:
a respective Litz wire; or
a respective trace wire.
4 . The wireless charging sink device of claim 1 , wherein a respective amount of current flowing through each of the plurality of capacitor and wireless charging coil series pairs is approximately equal.
5 . The wireless charging sink device of claim 1 , wherein wireless charging coils of the plurality of capacitor and wireless charging coil series pairs are located on a discrete coil component.
6 . The wireless charging sink device of claim 5 , wherein capacitors of the plurality of capacitor and wireless charging coil series pairs are located on the discrete coil component.
7 . The wireless charging sink device of claim 5 , wherein capacitors of the plurality of capacitor and wireless charging coil series pairs are located on a board that is different than the discrete coil component.
8 . The wireless charging sink device of claim 1 , wherein the sink circuit comprises a rectifier.
9 . A system comprising:
a wireless charging source device; and
a wireless charging sink device, wherein the wireless charging source device is configured to wirelessly charge the wireless charging sink device, and wherein the wireless charging sink device comprises:
a plurality of capacitor and wireless charging coil series pairs that are collectively in parallel; and
a sink circuit configured to receive a common signal from the plurality of capacitor and wireless charging coil series pairs.