• State TI Thinks Resolved
  • Locked Locked
  • Replies 4 replies
  • Answers 1 answer
  • Subscribers 64 subscribers
  • Views 161 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

BQ40Z50-R2: with TMP468 Temp sensor

Steven Zhang
Prodigy 120 points
Part Number: BQ40Z50-R2
Other Parts Discussed in Thread: TMP468, BQ40Z50

Tool/software:

Hi TI Experts,

I have some questions about using the TMP468 with the BQ40z50-R5:

  1. As stated in the TRM, the SCL/SDA of the TMP468 should be connected to TS3 and TS4 accordingly. Should we still add pull-up resistors to VCC (I'm using 1.8V as the power source for TMP468), or can we directly connect SCL/SDA to TS3/TS4?
  2. The BQ40z50 supports 4 thermistors, but our customer requires 6 temperature sensors. Can we use the TMP468 for additional temperature sensing without utilizing TS1 and TS2 (disabling them in this case)?
  3. When using TMP468, will the BQ40z50 use the temperature values from the TMP468 for temperature-related protection and the IT algorithm?

Thanks in advance for your assistance!

Best regards,

Steven

  • 0
    TI__Mastermind 24695 points

    Hi Steven,

    Steven Zhang said:
    As stated in the TRM, the SCL/SDA of the TMP468 should be connected to TS3 and TS4 accordingly. Should we still add pull-up resistors to VCC (I'm using 1.8V as the power source for TMP468), or can we directly connect SCL/SDA to TS3/TS4?

    Since this is communicating in I2C I believe that pull up resistors will be required. Please allow us to confirm this.

    Steven Zhang said:
    The BQ40z50 supports 4 thermistors, but our customer requires 6 temperature sensors. Can we use the TMP468 for additional temperature sensing without utilizing TS1 and TS2 (disabling them in this case)?

    I believe it can, please ensure TS1 and TS2 are disabled in the Temperature Enable register and that 10kOhm resistors are grounded to their pins.

    Steven Zhang said:
    When using TMP468, will the BQ40z50 use the temperature values from the TMP468 for temperature-related protection and the IT algorithm?

    Yes, I believe they will. Below is the initial description for this feature:

  • 0 in reply to Anthony
    Prodigy 120 points

    Hi Anthony

    Anthony said:
    Since this is communicating in I2C I believe that pull up resistors will be required. Please allow us to confirm this.

    OK, thanks.

  • 0 in reply to Steven Zhang
    TI__Mastermind 24695 points

    Hi Steven,

    These pins do require external pull ups for communication.

    Regards,

    Anthony

  • 0 in reply to Anthony
    Prodigy 120 points

    Hi Anthony

    Got it. 

    Thanks

    Steven