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use bq51020 2 set todo 2A charging

MENGKEONG FONG
Prodigy 230 points
Other Parts Discussed in Thread: BQ51020, BQ500215, BQ51025

Dear Sir,

      Can I use two bq51020..and connect both VOUT together todo 2A charging.
I try it was workable..just no idea whether need to add any protection circuit at vout 

Thanks


MK

  • 0
    TI__Genius 14890 points

    MK,

    We have done this type of connection on a previous version of the RX.  It has not been replicated with the bq51020.  The key to the solution is current sharing.  One is set to run at it's limit (1A) and the other is a slave (using an op-amp) to run at constant voltage.  I do not have documentation for the full solution.  Additionally, the transmitter must be able to supply the power required.

    Another option is the bq51025 receiver which is in development.  It will be a 10W receiver that is Qi compliant with 5W transmitters.  When paired with the bq500215 transmitter, it will be able to supply 10W.  This is also in development.  Either will work well when paired with other transmitters / receivers as Qi compliant.

    Regards,

    Dick