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Looking for 30-60mW wireless power transfer solution with proprietary comms

Hello TI Forum!

I'm looking for a wireless communication scheme something like the dual-interface NFC communication solution (like the ST M24LR or NXP NTAG I2C), but I need 30mW typical (100mW max) for the power transfer capability.

The application is for powering electronics inside a sealed container with probes inside and also being able to read out data collected from the probes (several times per day) through the wireless power transfer interface.  The data payload would likely be about 50 bytes (300baud to 10kbaud data throughput would be acceptable).  

The range between coils from outside the container to inside would probably be about 1.4".  

We are looking to transfer power to source power to the electronics inside the vessel and read out the data.  Due to the power levels, I'm assuming that the both the reader/power-sourcing side outside the container and the powered electronics portion inside the container would be proprietary.

I am looking for an IC and coil solution or reference design to start with.

Since the Qi and WPA solutions are primarily for standards-based charging solutions, I'm wondering if these solutions could be used in a proprietary way like described above.

Any feedback or input is welcomed and appreciated!

Thanks again!

Paul

  • Paul,

    Our wireless power solutions focus on providing Qi-certified solutions.  The devices are often used as-is in non-Qi solutions allowing for more flexibility in the implementation.  Some of the receivers can transfer data to the transmitter (loaded through the I2C interface).  Communication only occurs during normal power level communication which occurs once every 250ms under standard conditions.

    The solutions are optimized for solutions up to 5mm. 1.4" is not possible with these implementations.

    Regards,

    Dick