BQ25601D: Can charger detect BAT?

Yongki Jeong1

Intellectual 525 points

Part Number: BQ25601D
Other Parts Discussed in Thread: BQ25601

Hi Ti

I want to make a charger using the BQ25601.

It operates as Always On, and the battery is attached and detached.

Does the BQ25601 detect that the battery is attached and start charging automatically?
Or should I control it with I2C?

Sincerely

Jeong

over 2 years ago

+1 Garrett Kreger over 2 years ago

TI__Mastermind 25365 points

Hi Jeong,

On the BQ25601 charge is enabled by default. The IC does not detect battery connection, it will always attempts to charge. When no battery is connected IC will regulate the voltage of the BAT pin capacitor as if it is a small battery. Then when the battery is attached it will start charging automatically.

Please refer to this FAQ post for more details on BQ25601 operation when no battery is connected. link: https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1022795/faq-bq25601-faq-why-does-the-led-connected-to-stat-pin-flashes-and-the-sys-voltage-unstable-when-battery-is-not-connected-for-bq25601-bq25601d-bq25606-bq25611d-bq25616-bq25616j-bq25618-bq25619-bq25600-bq25600d-bq25600c

If you would like control charging with I2C charge can be enabled/disabled using CHG_CONFIG bit on REG01.

Regards,

Garrett

Power management

Power management forum

BQ25601D: Can charger detect BAT?