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USB-PD-CHG-EVM-01: USB-PD-CHG-EVM-01 Battery Charger register values

Nicholas Shattock
Prodigy 10 points
Part Number: USB-PD-CHG-EVM-01
Other Parts Discussed in Thread: BQ25798, TPS25751

Tool/software:

Is it possible to change the BQ25798 register values using firmware generated by the USBCPD Application Customization Tool?

In particular I am looking to change TS_WARM_1:0 to 3h (55C) from the default of 1h (45C).

Thanks,

Nick

  • 0
    TI__Mastermind 27702 points

    Hi Nick, 

    Thank you for reaching out!

    The TPS25751 does not configure the NTC Control Register 18h on the BQ. However, you can write to the BQ register over I2C using the following 4CC command "I2Cw".

    Pease let me know if you have additional questions/concerns.

    Best Regards, 

    Aya Khedr

  • 0 in reply to Aya Khedr
    Prodigy 10 points

    Hi Aya,

    Thank you for your response. Yes I had seen that it its possible to forward messages from the TPS to the BQ module. I was hoping for a solution without having a microcontroller generate the required message.

    However this solution may work and I will test it further. It is unfortunate that the EEPROM connected to the TPS is not able to contain the full configuration parameters for the BQ charger.

    Thanks,

    Nick