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Are there any devices supporting Qi, A4WP, and PMA?

TI Lady
Genius 4025 points
Other Parts Discussed in Thread: BQ51221

My customer is interested in devices that support all three alliances. Does TI have a device that does??

Thanks,

  • 0
    TI__Genius 14890 points
    Hi,

    We do not have any devices that support all three alliances.

    However, the bq51221 supports both PMA and WPC.

    Regards,

    Dick
  • 0 in reply to Dick Stacey
    TI__Intellectual 2825 points
    Hi Dick,

    Please correct me if I'm wrong but there are a few why there isn't a device that supports all three standards.

    They have different operating frequencies. WPC/Qi 100-200 kHz, PMA 230-270 kHz, and A4WP 6.78 MHz.

    They also communicate differently. WPC/Qi and PMA communicate via in-band (signaling over the power path). A4WP communicates out-of-band/BLE.

    Lastly, I don't think this matters much for why our devices aren't compatible across all 3 but the coupling of the Tx and Rx coils. WPC/Qi and PMA must be coupled tighter than A4WP.

    Regards,

    Trenton Reed