This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

BQ25713: Ship mode implementation

Part Number: BQ25713
Other Parts Discussed in Thread: BQ25895,

In my prior designs, I extensively utilized the BQ25895 due to its inclusion of the ship mode feature among other capabilities.

As you may be aware, the ship mode in the BQ25895 can be exited either by receiving a USB input or by a button press.

I am currently exploring how to implement a similar functionality to design around the BQ25713 as the power requirement exceeds what can be supported with BQ25895.

One approach involves adopting the design outlined in SLVA821, which uses TPS22915B.

As described in the app note, the idea behind this approach is to position the TPS22915B between the battery and the MCU.

Upon powering up the MCU, it can send a command to activate the BAT FET of the BQ25713 (BATDRV).

However, I am also interested in enabling the activation of TPS22915B when a 5V USB connection is established, similar to how the BQ25895 works.

Is there an alternative reference design that accommodates both button press and USB input to turn on TPS22915B?

Additionally, to power down the system, previously a shutdown command was sent to BQ25895 to enter into the ship mode.

For BQ25713, is there a way to achieve the same functionality? Perhaps turn off the BAT FET?

Essentially, I aim to replicate the ship mode functionalities of the BQ25895.

Regards,

Andrew

  • Hi Andrew,

    If you use the design that you mentioned, you would have to loss the power path management function of BQ25713 because you would not be able to connect VSYS to VOUT of TPS22915B due to the body diode of the BATFET. So, if you need power path management, this design will not work for what you need.

    Best Regards,

    Jacob