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BQ25628: BQ25268

Kiran Munj
Intellectual 520 points
Part Number: BQ25628

Can Vsys set to 4.15V?

The application diagram shows it can as shown (attached) on the 1st page of the datasheet.

But Vsysmin in the table shows Range: 2560mV-3840mV (20h-30h).

Is there a range for Vsysmax?

We want to set Vsys = 4.15V. Is this possible? Or TI has a typo in the Application Diagram in the datasheet.

Thanks

  • 0
    TI__Guru 57781 points

    Hi,

    The Minimal_System_Voltage setting (REGx0E) has the max setting of 3840mV.

    Referring to 8.3.4.1 Narrow VDC Architecture on the d/s, as the battery voltage rises above the minimum system voltage, the BATFET is turned fully on. When battery charging is disabled and VBAT is above the minimum system voltage setting, or charging is terminated, the system is regulated 50 mV (typical) above battery voltage. Since the battery voltage may go to 4.80V max, the SYS voltage may be 4.80V+50mV=4.85V.

    Thanks,

    Ning

  • 0
    Intellectual 520 points

    Thanks, Ning.

    But you didn't answer my question.

    We want to set Vsys = 4.15V. Is this possible?

    If YES, how to set it up so Vsys = 4.15V?

    Thanks.

  • 0 in reply to Kiran Munj
    TI__Guru 57781 points

    Hi,

    User can't set Minimal_System_Voltage setting to 4.15V.

    Thanks,

    Ning.