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Original question:

BQ25895: BQ25895 CHG_STAT 00, 01, 11change, when remove the battery

BQ25895: BQ25890HRTWR

Fany Danae
Prodigy 40 points
Part Number: BQ25895
Other Parts Discussed in Thread: BQ25713

Hi

For the activation of the charger, do I always have to communicate through I2C?

I always want the output to have 4.2v although the battery has no charge.

Thanks.
  • 0
    TI__Guru**** 166996 points
    Hi Fany,

    No. The charger operates in default mode with default settings (VBATREG=4.2V, IINDPM set per D+/D- but clamped by ILIM resistor, ICHRG=2A). If you attach a battery with less than the MINSYS voltage (default=3.5V) or have no battery and disable charge with/CE pin, the SYS output provides the MINSYS voltage not 4.2V.

    Regards,
    Jeff
  • 0 in reply to Jeff F
    Prodigy 40 points
    Hi Jeff F

    Thanks for you answer.

    You can help me with a component that always has 4.2v in SYSTEM, even though my battery has no charge and the current is 5 A.

    I want something similar to this one but with more Current BQ24076RGTT.

    Thanks.
  • 0 in reply to Fany Danae
    TI__Guru**** 166996 points
    Hi Fany,

    The only NVDC power path charger with MINSYS voltage higher than 3.7V is BQ25713 buck boost charger. It requires host firmware and I2C for operation.

    Regards,
    Jeff
  • 0 in reply to Jeff F
    Prodigy 40 points

    Thanks Jeff.

    I would have liked more a component like this: BQ24076RGTT

    It does not have many components and I do not need to program it. You will have a similar one with current of 3-4 A

    Thank you.