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BQ51050B vs (BQ51003 + BQ25100 combo)

Fabien LETORT
Intellectual 385 points
Other Parts Discussed in Thread: BQ25100, BQ51003, TIDA-00318, BQ51050B, BQ51013

I notice that the combo BQ51003 + BQ25100 seems really interesting for low power wereable application as seen by the TIDA-00318 reference design.

But, finally, the BQ51050B should not be also a correct choice for this kind of application ?

It seems smaller because all is in one package : the wirelless receiver and the charger.

So is should be a little bit cheaper too (with all the bom).

Isn't it ?

  • 0
    TI__Genius 12475 points

    Fabien,

    It depends on the application. The BQ25100 gives you a greater flexibility and can support lower termination currents and very high accuracy.

    The BQ51050 is a good device for integration. We see designers adopting both of these solutions.

    Regards,
    Gautham

  • 0
    Prodigy 20 points
    Fabien,
    Just a month ago, I was about to adapt BQ5105xB to my project. Finally, I found the current delivered by this receiver/charger was much higher than what can be received by my battery. So I have to change the component...

    Regard,
    Ziyi ZHONG
  • 0 in reply to ZIYI ZHONG
    TI__Genius 14890 points

    Ziyi,

    What is the charging current of your battery?  The bq51050B charge current can be adjusted through a resistor.  Depending on how low the current is, then the bq51003 + bq25100 may be better - and the current can be adjusted on the bq25100 with a resistor as well.

    Regards,

    Dick

  • 0 in reply to Dick Stacey
    Prodigy 20 points
    Hi Dick !

    Thanks for your answer. I was looking for a wireless charger solution to reuse a battery which is supposed to be charged at about 200mA. The bq5105xB can be only descent to 500mA. I'm now waiting for my bq51013 + charger combo card for test propos.
    Are you(ti) planning to release any one chip Wireless Charger solution with a low charge current ?

    Regard,

    Ziyi
  • 0 in reply to ZIYI ZHONG
    TI__Genius 14890 points

    Ziyi,

    We are investigating a lower current single-chip charger but have no plans at this time to release a device.

    Regards,

    Dick