SLUUCW9 December 2023 BQ76972
The BQ76972 device integrates an Internal Overtemperature (OTINT) Protection that triggers an alert or fault when the internal temperature is greater than or equal to a programmable threshold TOTINT. The TOTINT threshold is programmable from -40°C to 120°C in 1°C steps using the Protections:OTINT:Threshold configuration register. The OTINT protection is enabled using the Settings:Protection:Enabled Protections B:[OTINT] configuration bit.
The OTINT protection triggers an alert signal when an internal overtemperature event is first detected, then triggers a fault after a programmable detection delay, OTINT_DLY, which can be set from 0 to 255 seconds in units of 1 second. The delay is set by the Protections:OTINT:Delay configuration register.
When an OTINT fault is triggered, the device turns off the DSG FET, the CHG FET, or both FETs if configured for autonomous FET control, based on settings in Settings:Protection:DSG FET Protections B[OTINT] and Settings:Protection:CHG FET Protections B[OTINT]. The device recovers (if configured for autonomous recovery) when the temperature is less than or equal to the threshold set by Protections:OTINT:Recovery for Protections:Recovery:Time duration.