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bq27425-G2A / Can't enter sleep mode

S.Satoshi
Guru 21685 points
Other Parts Discussed in Thread: BQ27425-G2A, BQ24725

Hi everyone,

Our customer evaluating bq27425-G2A by using EVM. At first they performed learning cycle by setting FC Set% = -1, after that they set  FC Set% = 100 and performed charging and discharging. As attached log, they performed no load condition but it was not into sleep mode. 

Can you check the attached log and give your advice.

2806.bq27425-G2A_can not enter sleep mode.zip

Best Regards,

Sonoki / Japan Disty

  • 0
    TI__Expert 4115 points

    Hello,

    The bq27425-G2A will not be allowed to go into SLEEP mode until the gauge detects that the battery is inserted.  The gauge indicates if the battery is detected by setting the [BAT_DEt] bit in the Flags() register.  Looking at the log file you provided the [BAT_DET] bit is not set.  The '425-G2x defaults to having the battery detection and removal being detected using the BIN pin.  If the BIN pin is low the gauge will detect the battery inserted and if the BIN pin is low the gauge will believe there is not a battery inserted.  The BIN pin can be connect to the battery pack's thermistor pin or a host can toggle the BIN pin accordingly.  Also, the gauge can detect battery insertion/removal with a software command.  In order to configure the gauge to detect battery insertion through hardware or software you need to set or clear the [BIE] bit in the Op Config register.  Please refer to the datasheet for more information.

    I hope this helps.

  • 0 in reply to Jared Casey
    Guru 21685 points

    Hi Jared-san,

    Sorry for delayed response.

    Thank you for your explanation. It is enough to understand the condition to enter bq24725 to sleep mode. Our customer can do it by following your advice.

    Best Regards,

    Sonoki