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BQ51050B: Switching Frequency/FCC Certification

Prodigy 90 points

Replies: 2

Views: 2458

Part Number: BQ51050B

Hi All,

I currently working on a device that uses the BQ51050B as a wireless charger. I understand that the device meets the Qi charger standard uses a switching frequency between 110kHz and 205 kHz.

In order to meet FCC regulations in the United States a wireless charger device can't emit frequencies between 90kHz and 100kHz.

Can this device be used for wireless charging in the United States without defying these regulations? Or is the switching frequency determined purely by the charger?

Thanks in advance for any help you can give.

Regards,

Andrew

  • Hi Andrew
    The frequencies is determined by the transmitter not receiver. In the WPC standard some of the transmitters are fixed freq topologies. Most of the TI transmitter designs use an A11 type that will vary operating freq from 110kHz to 205kHz.
    But the receiver must operate will all WPC certified designs and the bq51050B will.

    Best Regards,

    Bill Johns,  Applications Engineer

    Texas Instruments Inc

    Dallas, Texas

    For more information on Battery Charger Solutions see Link

    Search "FAQ" on E2E Forum for common questions on battery charger solutions. 

  • In reply to Bill Johns:

    Hi John,

    Thanks for your response. I suspected this but wanted to be sure.

    Cheers,
    Andrew

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