• State Resolved
  • Locked Locked
  • Replies 5 replies
  • Answers 2 answers
  • Subscribers 63 subscribers
  • Views 382 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

TPS25730: TPS25730D Status I/Os

Tal Cohen
Prodigy 50 points
Part Number: TPS25730
Other Parts Discussed in Thread: BQ25756E

Tool/software:

Hello,

I would like to know if I can read the status I/Os (FAULT_IN, PLUG_EVENT, PLUG_FLIP, etc.) of the TPS25730DREFR through the I2C bus.

Thanks,

-Tal

  • 0
    TI__Genius 12675 points

    Hi Tal,

    This is not possible on TPS25730. This was simplified on the device to be readable through GPIO output only. The only accessible data through I2C is detailed in the TPS25730 Technical Reference Manual on ti.com.

    Best,

    Alex

  • 0 in reply to Alex Liu
    Prodigy 50 points

    Thanks, Alex,

    I have additional questions regarding the TPS25730D.

    1. What happens if a USB BC 1.2 is connected?

    2. I need to build a 5S-NiMH battery charger (with NTC). I need a buck-boost converter, I was thinking of using the BQ25756E together with the TPS25730D

    the BQ25756E datasheet says it supports Li-Ion, Li-polymer, or LiFePO4. It does not mention NiMH.

    What buck-boost converter charger IC is recommended for 5S-NiMH?

    Thanks again,

    -Tal

  • 0 in reply to Tal Cohen
    TI__Genius 12675 points

    Hi Tal,

    TPS25730D does not support BC1.2, so if a BC1.2 device is connected, the voltage and current will be limited to 5V 1.5A.

    For the question on BQ25756E, please create another E2E under the BQ part number. The BQ battery charger team will be able to provide the expertise.

    Best,

    Alex

  • 0 in reply to Alex Liu
    Prodigy 50 points

    Thanks, Alex,

    I will address the question related to the BQ25756E to the BQ battery charger team.

    I do have an additional question regarding the TPS25730D's VIN_3V3 pin though.

    I am not sure how to connect this pin. Should it be connected to an external 3.3V regulator?

    What is it used for?

    My project powers from either a USB port or an internal battery.

    Thanks again.

    -Tal

  • 0 in reply to Tal Cohen
    TI__Genius 12675 points

    Hi Tal,

    VIN_3V3 provides power for the PD controller (note that this is separate from VBUS, which is part of the power path). You should connect it to a 3.3V regulator in your system. 

    In your system, the PD will be powered from VIN_3V3 when it is powered off of internal battery. The PD will be powered from its internal VBUS to 3V3 LDO when the system is not powered (internal battery not providing power), and an adapter is connected to the port.

    Best,

    Alex