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CC2640R2F: Verifying connection for battery monitoring

David Tandri
Expert 1355 points
Part Number: CC2640R2F
Other Parts Discussed in Thread: BQ25101

Hi,

I would like to use the battery monitoring feature on CC2640R2F and want to verify the connection on schematic.

I have a single cell LiPo battery that is connected BQ25101 charging chip and then the output of the charging pin (OUT) goes to an analog gpio pin on CC2640R2F for battery monitoring. Am I right on this connection?

At the same time, the 'OUT' pin also power up some modules

Any advice on this?

Thanks

  • 0
    TI__Genius 11810 points

    Hi, 

    The internal battery monitoring feature of CC2640R2F is actually ony a battery monitor if you have a battery connected directly to VDDS, because what is does is measuring the VDDS voltage. In your case you can use the internal ADC instead to read the voltage level of your battery. You might need to use an external voltage divider if you LiPo battery goes all the way up to 4.2 V, as the maximum GPIO voltage is 3.6 V and should not be higher that VDDS on CC2640R2F. 

    -Simon

  • 0 in reply to Simon J
    Expert 1355 points

    I see. 

    Sorry, i forgot to mention that the 'OUT' pin of the charging pin has already been connected to a 1.8V regulator. Then, the output of the regulator will power the MCU via VDDS.

    Is there still any ways to monitor the battery?

    Thanks

  • 0 in reply to David Tandri
    TI__Genius 11810 points

    Can you share your schematics with me? Either here public on E2E or over private message on E2E. Then it will be easier for me to answer you question.

    -Simon

  • 0 in reply to Simon J
    TI__Genius 11810 points

    Closing thread. The schematic was reviewed offline.