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BQ25504 Vrdiv pin functionality

Roger Liang
Expert 3510 points
Other Parts Discussed in Thread: BQ25504, BQ25505

Hi,

We would like to gain more insight on how the VRDIV pin biases the BQ25504.

How is this voltage correlated to any other voltages in a BQ25504 ecosystem?

Perhaps customer can take advantage of this bias voltage else where in the system.

Thanks

Roger

  • TI__Guru**** 167196 points

    If you take a look at the bq25505 datasheet page 15 figs 21 and 22, you will find plots of the VRDIV voltage.  It is not a constant voltage and only connects the external resister dividers to the sense points every 64ms.  Connecting any other node to these voltages is not recommended.