BQ25606: About the operation of BQ25606 for a deep discharge battery

Tsukui Yusuke

Guru 21930 points

Part Number: BQ25606
Other Parts Discussed in Thread: BQ25895, BQ25601

Hi,

Let me ask you about BQ25606 behavior with respect to deep discharge battery.
Battery voltage of the deep discharge battery is 1.5V～1.7V.
The battery in this state is charged / discharged prohibited by the protection IC.
How does BQ25606 work when a battery with the above conditions is connected?

After checking the operation of the actual application, it will try to start charging every time it is connected.

The BQ25606 applies a charging current for a moment to check the battery status, and repeats the operation of stopping the charging.
Is this understanding correct?
And If this behavior is correct, is there a way to know this situation with an external MCU?

Regards,
Yusuke

over 3 years ago

0 Ning T over 3 years ago

TI__Mastermind 46591 points

Yusuke,

Please visit https://e2e.ti.com/support/power-management/f/196/t/890626 for BQ25606: Schematic Review and PCB Layout Design Tips. Additional Information including FAQs is available http://www.ti.com/lit/an/slva924/slva924.pdf Designing A Standalone Single Cell 3-A Charger with the bq25606. FAQ "When battery is not connected, that is, BAT pin is floating, why does the STAT pin blink?" on page 5 should be helpful to your question. The device does not have battery detection function. BQ25606 is a standalone charger without I2C communication.

Hope this thread is helpful for you. BQ25895 is similar to BQ25606 with I2C communication.

Thanks,

Ning.

0 Tsukui Yusuke over 3 years ago in reply to Ning T

Guru 21930 points

Hi Ning,

Thank you for your information and support.

Is it possible to check the operating status flag for deep discharge with BQ25601?
Let me post your question again about BQ25601 which is an I2C control compatible product.

Regards,
Yusuke

0 Ning T over 3 years ago in reply to Tsukui Yusuke

TI__Mastermind 46591 points

Yusuke,

We will respond the 601 questions in the other thread. This thread is considered resolved and closed.

Thanks,

Ning.

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BQ25606: About the operation of BQ25606 for a deep discharge battery