Wireless Charging Coil Array Solution?

[corynrobinson]

Does NXP offer a solution for large area wireless charging? More specifically, I’d like to implement something similar to WPC’s B1 coil array. The part I’m having trouble with is coil selection.

[reyes]

Hi,

I suggest you to use the WCT1111 in B type (Multi-coil) solution, this way you will use only one chip to control multiple coils.

Please refert to the detali in below link:/external-link.jspa?url=https%3A%2F%2Fwww.nxp.com%2Fproducts%2Fpower-management%2Fwireless-power%2F1...https://www.nxp.com/products/power-management/wireless-power/15-watt-wireless-charging-transmitter-i...

I also recommend you to review the application note “Migration from A13 to B5 Wireless Charging Transmitter” in the link below, this App Note describes how to design a multiple coil wireless charger with the topology B5, which design has four PCB coils. This transmitter topology allows to connect two coils simultaneously to achieve better charging performance and active area efficiency for the case when the receiver is placed between two coils.

AN5059: https://www.nxp.com/docs/en/application-note/AN5059.pdf

Have a great day,

Jose

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[corynrobinson]

Thank you for those resources, however, I’m looking for a solution that provides a much wider charging area. B5 only supports 4 coils, but I’d like to implement something like 12 coils.

[reyes · Accepted solution]

Unfortunately there is no solution in the current NXP portfolio to support 12 coils.