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BQ25120A: how to get the pmic to shipmode?

Aiswarya krishnan
Prodigy 85 points
Part Number: BQ25120A


Hi,

We have set MRREC bit of PMIC to 0 during initialization. As per the data sheet ,PMIC supposed to enter ship mode once reset occurs.But PMIC is not entering ship mode. How to get the PMIC to ship mode?.

  • 0
    TI__Genius 16715 points
    Hi,
    Can you make sure you follow datasheet section 9.3.1.1 to force BQ25120A enter ship mode?

    9.3.1.1 Ship Mode Entry and Exit
    The device may only enter Ship Mode when there is not a valid VIN supply present (VIN < VUVLO). Once the IN supply is removed there are two ways for the device to enter Ship Mode: through I2C command using the EN_SHIPMODE bit and by doing a long button press when MRREC bit is set to 0. If the EN_SHIPMODE bit is set while the IN supply is present, the device will enter Ship Mode upon removal of the supply. The EN_SHIPMODE bit can be cleared using the I2C interface as well while the IN input is valid.
    In addition to VIN < VUVLO, CD and MR must be high. Once all of these conditions are met the device will begin the transition to Ship Mode. All three conditions must remain unchanged for a period of tQUIET to ensure proper operation. Figure 15 and Figure 16 show the correct sequencing to ensure proper entry into the Ship Mode through I2C command and MR button press respectively.

    Please take a look figure 15 and figure 16 for more detail.

    Thanks
  • 0 in reply to Paul Yeh
    Prodigy 85 points
    Iam following as per the datasheet,still iam not able to get into shipmode through mr button press.can you suggest me the register settings.
  • 0 in reply to Aiswarya krishnan
    TI__Genius 16715 points

    Hi,

    Please follow up figure 15 to enable shipmode.

    Thanks

  • 0 in reply to Paul Yeh
    TI__Genius 16715 points
    Hi there,
    We haven’t heard back from you. We are assuming you were able to resolve your issue. If not, just post a reply below or create a new thread if the thread has locked due to time-out.
    Regards
  • 0 in reply to Paul Yeh
    Prodigy 85 points

    Hi Paul,

    I'm still stuck with my issue.iam able to enter the pmic to shipmode through i2c,but its not coming out of shipmode through mr button press.

    These are the register settings i have done.Please let me know if any correction to be made.

    TS Control and Faults Masks Register-0x08

    Status and Ship Mode Control Register-0x00

    Fast Charge Control Register-0x84

    Faults and Faults Mask Register-0x04

    Push-button Control Register-0x00

    SYS VOUT Control Register-0xFE.

     Regards,

    Aiswarya

  • 0 in reply to Aiswarya krishnan
    TI__Genius 16715 points
    Hi,
    Your case is behind my capability so I will loop another people to support.

    Hi Gautham,
    Can you help on this case? Customer can't force BQ25120A enter ship mode.

    Thanks
  • 0 in reply to Paul Yeh
    TI__Genius 16715 points
    Hi Gautham,
    Can you help on this case? Customer can't force BQ25120A enter ship mode.

    Thanks
  • 0 in reply to Paul Yeh
    TI__Genius 12485 points
    Hi Aiswarya,

    i have sent you a message on E2E privately to see what could be happening. Let me know if you have further questions. Also feel free to create a new thread if you are seeing any issue. thanks!