SLUSDU0 September 2019 BQ21061
The input over-voltage protection protects the device and downstream components connected to PMID, and BAT against damage from over-voltage on the input supply. When VIN > VOVP an OVP fault is determined to exist. During the OVP fault, the device turns the input FET off, sends a single 128-µs pulse on INT, and the VIN_OVP_FAULT FLAG and STAT bits are updated over I2C. Once the OVP fault is removed, the STAT bit is cleared and the device returns to normal operation. The FLAG bit is not cleared until it is read through I2C after the OVP condition no longer exists. The OVP threshold for the device is 5.5 V to allow operation from standard USB sources.