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BQ79616-Q1: AFE close to base board communication load is largest

Howard Zou
Genius 12365 points
Part Number: BQ79616-Q1
Other Parts Discussed in Thread: BQ79616

Hi,

in daisy chain architecture, the AFE BQ79616 closest to base board will have the largest communication load, since the communication has to pass the first one no matter the MCU wants to communicate to which BQ79616. And it may lead to unbalance between different modules.

Do we have benefit against other competitors when considering such problem except by passive dissipate the energy to a resistor through GPIO?

  • 0
    TI__Intellectual 2520 points

    Hi Howard,

    Another option is to use RING architecture, first using North direction to get back all data,

    secondly using south direction to get back all data. So in the long run, the power consumption is evened.

    Thanks!

    Andy

  • 0 in reply to Andy Li55
    TI__Genius 12365 points

    Andy,

    thank you.

    Let's say 1 is closest to base board on the north, and 8 is closest to base board on the south. We have 8 devices in a ring.

    If first use North direction, secondly south direction, it seems that No. 4 and 5 devices have the lowest communication burden, No.1 and 8 devices have the highest communication burden. Right?

  • 0 in reply to Howard Zou
    TI__Intellectual 2520 points

    Hi Howard,

    If it is north direction, COMH of n to COML of n+1, then device 1 is the most heavy and device 8 is the most light;

    If it is south direction, COML of n to COMH of n+1, then device 8 is the most heavy and device 1 is the most light;

    Andy