The data sheet (Rev. I) chapter 9.3.5 says: "When the PRES pin is left floating (...), the load is not connected, and the device is not in any fault condition, the device enters HIBERNATE mode after tPRES_DEG_ENT time."
However in 188.8.131.52 no additional conditions for HIBERNATE mode entry are mentioned. Figure 9-15 also suggests that the device will enter hibernate mode from normal and fault modes 4.5 seconds after letting PRES floating.
My tests with BQ77915EVM also show the latter behaviour: About 4.5 s after I remove the shunt from J4, BQ77915 goes into hibernation (no voltage at AVDD) regardless of the previous situation. Any connected load is shut down.
For my application the forced hibernation observed with BQ77915EVM is beneficial/required.
Is it just a confusion in the data sheet or is the intended behaviour the one described in 9.3.5? If 9.3.5 is correct, do I have a defective device and may the behaviour of BQ77915 be adjusted in the future?