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BQ27510-G2: BQ27510-G2 EOL and replacing with -G3 version?

Part Number: BQ27510-G2

Team,

I wanted to clarify a few questions for my customer regarding migration from -G2 to -G3 device.

  • Is it intended that application software written for the –G2 (v1.23) will work exactly the same with the –G3 (v4.00)?
    • In other words, how much product-level software changes should I expect to have?  If I don’t want to take advantage of any new features of the –G3, can my existing product software work as-is with the –G3 part?
  • Is the silicon the same between the –G2 and –G3?
    • If not, is there a silicon rev errata that shows the differences?
  • Is it possible to purchase the –G3 and then roll back the firmware to v1.23?  To be clear, we would not do this to any in-field devices – this would only be done as part of our manufacturing process.
    • I’ve found SLUA453A, but it isn’t explicit in being able to down-rev firmware.
    • Is it possible to do this in-circuit?
    • Can you send me the v1.23 firmware that exists in the current –G2 part?
      • Is there a way for me to independently confirm (checksum / MD5?) this is the same firmware that exists in my –G2 part?

  • It depends on the software on the host uC. If the software just reads gauging results, it will be compatible. If the software performs in-system programming of the gauge (configuration, firmware updates) then it is not 100% compatible.

    The silicon is the same.

    Rolling back FW is not officially supported by TI.

    I'll provide the the G2 FW via e-mail.

  • Thanks for the help Dominik (Julio posed the questions on my behalf)!

    I will take your comments here and provide some options to my customer with what they want to do.  I figure they can either:

    • do a LTB when the -G2 goes EOL
    • roll-back the FW (not officially supported by TI)
    • move forward with the -G3 part (but likely require some device/application SW updates and further verification testing)

    -Bill