BQ27Z746: BQ27Z746 does not wake up when charging voltage is present

If you leave /ENAB floating, the device will not be enabled. You'd have to connect it to PACK- to enable wake up.

Hello, Dominik. Yes, when the enab is floating, the device loses i2c connection in shutdown mode, but it wakes up when the Vpack voltage appears - tested on a real device. When the enab is pulled down, the device does not wake up from the Vpack voltage appears. We have decided not to use the  time-based shutdown
mode, only voltage-based shutdown when the battery voltage is very low.

/ENAB is supposed to be high before entering shutdown or ship mode (and while in these modes) and low to exit a low power mode via this pin. It's not supposed to be pulled low all the time.

When developing the circuit, we were guided by a typical application from the datasheet, where ENAB is shown as being constantly pulled down. If this is not necessary, then in a typical application it should be shown connected to the host. Otherwise, the datasheet is misleading.

Ok, thanks for the explanation