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.

BQ25600: Can the /QON pin be pulled up to a high level externally

Part Number: BQ25600

Tool/software:

Dear TI Engineer,

We have some question about the /QON pin of BQ25600, that is, we connected the/QON PIN to GND through a toggle switch S1. However, after the switch, this pin will always be at a low level. We want to pull it to a high level through an external pull-up. Did the BQ25600 support this?

The reason why we are doing this to achieve ultra-low power consumption when the device is turned off. When the device is turned off, we need the BQ25600 to enter ship mode. But at this point, the /QON pin is connected to GND through the switch, so we want to pull the it to a high level through external pull-up.

Considering that QON has internal pull-up, we have added a reverse diode for protection.

Thanks,

Kind Regards

  • Hello,

    The /QON pin has an internal pull-up, there is no need to connect it to anything but the switch to GND. 

    Regards,

    Mike Emanuel

  • Hello Mike,

    We know there has an internal pull-up of /QON pin. The switch SW1 will keep the /QON pin grounded continuously after force the BQ25600 exit ship mode. What we are concerned about is that when the /QON pin is connected to GND for more than 8 seconds, the full system power reset will occurs, which will affect the power supply of the system, so we want to pull this pin to a high level through external pull-up.

    Now we need to confirm what is the minimum voltage required for the high level of the QON pin? Does it the same as the PSEL and /CE pin (The minimum voltage for high level needs to be greater than 1.3V)?

    Thanks,

    Kind Regards

  • Can you please draw a diagram with clear labels of your intended setup at each stage?

    Regards,

    Mike Emanuel