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BQ79606A-Q1: Choose between BQ79606 and BQ769X0

Howard Zou
Genius 12365 points
Part Number: BQ79606A-Q1

Hi,

my customer is making BMS for 48V battery pack(16 series) for solar inverter with energy storage.

It seems that BQ79606 and BQ769X0 can both support it.

Can anybody give me a general guideline how to choose between these two devices:

For example, each device's typical application.

Pros and cons between the two devices.

  • 0
    TI__Genius 12365 points

    And we specify BQ79606 Stackable configuration up to 64 devices, what limit the number to 64?

  • 0 in reply to Howard Zou
    TI__Genius 17370 points

    Hi Howard,

    The bq79606A is more typical for automotive applications as it has more advanced features in terms of functional safety, higher accuracy, and higher cell balancing current etc. However it is also used in ESS systems if the user requires some of these features beyond the bq769x family. I recommend reading over the 1st page of the datasheets to understand if your customer requires some of the more sophisticated features of the bq79606A.

    As for stacking, it is limited to 64 devices stacked in series based on the address register space, however that does not mean you can't support higher pack configurations through other means. It looks like you mention that they have 16 series (48V) so this would only require 3 bq79606A devices.  

    Best Regards,

    Taylor

  • 0 in reply to Taylor Vogt
    TI__Genius 12365 points

    Taylor,

    thanks. The customer need functional safety so we promoted BQ79606 to them.

    I've got a question from the customer:

    in datasheet page 255, figure 66.

    BQ79606 communicate with MCU through UART, they doubt the cable length it can support, they need to support 2meters long @ about 250kbps baud rate. Do we have statistics to show if we can support the length at such a data rate?

  • 0 in reply to Howard Zou
    TI__Genius 17370 points

    Hi Howard,

    I will reply to you via email on this topic, and so I will close this thread. Please kindly click the Resolve button.

    Regards,

    Taylor