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BQ34Z100-G1: R2 offer compared to G1 / I2C request after a POR

Jan Bock
Expert 3025 points
Part Number: BQ34Z100-G1
Other Parts Discussed in Thread: BQ40Z50

Hello Team

can you help with the Question below: 

In our current project we also want to use a Li-Ion battery pack (min. 3S, maybe 4S) and therefore decided to use the BQ34Z100-G1 as the newer device (even though the operating current in FULLSLEEP is much higher).

  • What advantages would the -R2 offer compared to G1?
  • Does a new Golden image have to be created for the -R2?
  • With the -G1 I currently have the behavior that the gauge does not reliably give an ACK to an I2C request after a POR. From the datasheet it is not clear how long after a POR at least must be waited until an I2C communication is possible. Can you give me concrete information about this?

Thanks 

Jan 

  • 0
    TI__Guru** 105590 points

    Hello Jan,

    The differences between G1 and R2 are explained in the Technical Reference Manual for the R2, each change is defined.

    Yes a new golden image must be generated, the memory map is not the same.

    Generally you should wait about ~1s until the gauge has taken the first ADC measurements and processed them.

    If they are using 3s to 4s I am curious why the BQ40Z50 was not selected?

    Sincerely,

    Wyatt Keller