Hello IIan Seeder:
Thank you for participating in the NFC community.
About your question, if you mean to use an NXP Controller or FrontEnd chip to emulate a MIFARE Classic tag, unfortunately I don't know of any such example. Using Card Emulation mode you can emulate an ISO14443 type A card but not the full MIFARE Classic type.
The implementation of a MIFARE Classic product (or any MIFARE product) involves the use of a secure element together with an NFC controller. The secure element stores the keys and cryptography of the MIFARE card. For mobile devices the solution you would be looking for is the MIFARE4Mobile. Please visit the next page for more information:
https://www.mifare4mobile.org/
I hope this helps.
Regards!
Jorge Gonzalez