Wireless NFC charging battery circuit

[joshu2991]

Hello!

We are using the chip nRF52832 with the circuit recommended by Nordic Semiconductors, we want to implement the recharge of a battery by NFC. Without any data transmission, just implement the battery charge. We have searched the Nordic website and it seems that this is possible using the nRF52832:

https://devzone.nordicsemi.com/f/nordic-q-a/20621/wireless-charging-circuit/138421#138421

https://devzone.nordicsemi.com/f/nordic-q-a/32942/qi-charging-and-nrf52832-antenna/126467#126467

https://devzone.nordicsemi.com/f/nordic-q-a/50101/nfc-pins-broken-because-of-qi-charger-how-to-do-qi-nfc

https://devzone.nordicsemi.com/f/nordic-q-a/30933/qi-charger-interferes-with-nfc-causing-dramatic-increase-power-consumption

Also, we have seen that there is an AirFuel SDK (which is apparently no longer available: https://devzone.nordicsemi.com/f/nordic-q-a/44806/airfuel-with-nrf5) that works by oscillation, however, we only search for the load by NFC.

Does Nordic have any sample circuits that can be used for NFC charging? Or a specialized SDK for this function?

In any case, could anyone help us with the circuit and the software needed to perform this task?

Thank you very much in advance!

[Andreas]

Hi,

 

We do not have any sample circuits for wireless charging. The NFC circuitry is designed as a NFC tag, this is separate from charging and for communication only. You could maybe in theory combine the antennas, but unfortunately I do not know how easy this would be, you would need a separate charger IC and somehow be able to shield them from each other, see e.g. this https://devzone.nordicsemi.com/f/nordic-q-a/50101/nfc-pins-broken-because-of-qi-charger-how-to-do-qi-nfc 

 

Best regards,

Andreas

[joshu2991]

Thank you very much for your prompt response and thanks for the link Andreas, I'll see what I can do.

Have a great day