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BQ25858B-Q1: Application Issues

? ?
Prodigy 30 points
Part Number: BQ25858B-Q1
Other Parts Discussed in Thread: USB2ANY, , BQ25858-Q1, BQSTUDIO, EV2400

Tool/software:

Dear expert,

 I have two questions regarding the BQ25858B - Q1:

  1. When the device is powered solely by a battery, which pin does it use to obtain power from the battery to ensure its normal operation?
  2. I'm using a USB2ANY to connect to the development board. According to the manual, I should select BQ25758GUI, but I can't establish a connection due to an incorrect address. The address of BQ25858B - Q1 is 0X4B, while only 0X6B is available on the interface. How can I resolve this issue?
Thank you for your time and assistance.
  • 0
    TI__Expert 6755 points

    Hi,

    1. The device uses the SRN pin to obtain the power from the battery.
    2. The BQ25758GUI is the closest GUI for the BQ25858-Q1 device, but it does not have the correct address for the BQ25858B-Q1. I will see what I can do to update this as soon as I can.

    In the meantime, do you have an EV2400 that would be able to work with BQStudio? I know that BQStudio has a configuration with the correct I2C address.

    Best,
    Michael

  • 0 in reply to Michael Bradbourne
    Prodigy 30 points
    1. I have received the first message. In the schematic diagram of the demo board, a resistor is connected in series between SRN and the positive pole of the battery. I would like to clarify the current drawn when the battery is supplying power, so as to confirm the power of the resistor.
    2. Sorry, I only have the USB2ANY that I applied for, and I don't have the EV2400. Can I apply for the EV2400?
  • +1 in reply to ? ?
    TI__Expert 6755 points

    Hi,

    1. The resistor selection on the EVM is 0.1 W. I think this value or anything higher should work fine.
    2. I am actively working on updating the TI Charger GUI. I hope to have it done by the end of the week or early next week at the latest. If the EV2400 would arrive quicker then it may be more beneficial to apply for it.

    Best,
    Michael

  • 0 in reply to Michael Bradbourne
    TI__Expert 6755 points

    Hi,

    The TI Charger GUI should be updated now to include the BQ25858B-Q1 I2C address. Please let me know if there are any issues.

    Best regards,
    Michael Bradbourne