NFCのトピックRe: pn7220 antenna current

pn7220 antenna current

zhangkai — Wed, 08 Jul 2026 08:10:29 GMT

Hello, could you advise how to configure the NFC antenna current for PN7220 via libnfc-nxp-rfExt.conf or other configuration files? Our tests show the antenna current is too high and needs to be reduced.

Re: pn7220 antenna current

KaiLi — Wed, 08 Jul 2026 12:43:48 GMT

Hello @zhangkai

Recommends to enable DPC , but before enable DPC,which needs to be calibrated.

Re: pn7220 antenna current

Tomas_Parizek — Thu, 09 Jul 2026 12:01:44 GMT

Hello @zhangkai ,

If you only need to reduce/limit the current, you can do it in the same way as described here: https://community.nxp.com/t5/NFC-Knowledge-Base/PN7642-Basic-RF-power-limitation-using-DPC/ta-p/2187514

TOma