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BQ2057W: About the behavior of VCC

Part Number: BQ2057W

Hi,

I would like to ask you a question about the BQ2057WTS device.

(Question 1)
In the figure below, should the minimum VCC voltage when VBAT is 8.4V be as follows?
The diode (D1) is not considered.
VCC = VBAT-VDS (Q1) - (RSNS * ISNS)

Also, I understand that VCC can be used from the above minimum voltage to the maximum 15V, but is it correct?

(Question 2)
What happens to VBAT voltage control when VCC is below 8.4V?

Best regards,