PN7462 Low Power Card Detection

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PN7462 Low Power Card Detection

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kashyap_gada
Contributor II

Dear All,

I have designed a board using PN7362 based on similar lines to PNEV7462C Development Board with same antenna design 65x65 photo attached. Also Attached SchmaticWhatsApp Image 2021-05-20 at 13.47.40.jpeg.

While working with the Door Access Example enabling/disabling standby mode, I have observed that when disabled Standby Mode both the Eval Kit and My Custom board work properly. But when standby mode is enabled, though eval kit still works, my custom board doesn't detect the Mifare Classic cards.

The capacitors on the antenna section of my boards are similar to the ones on eval kit except the tolerance I have used is 10%.

Though I have read AN11785, I am out of clue why the custom board isn't working in standby when it works in normal mode.

Can any one let me know what should I do.

 

Regards

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kashyap_gada
Contributor II

We converted PNEV7462C from 4 layer to 2 layer where ground plane below PN462C was removed. Will that affect output in low power mode?

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