The device has a built-in safety timer to prevent an extended charging cycle due to abnormal battery conditions. The safety timer is 2 hours when the battery is below the V_BATLOWV threshold and 10 hours when the battery is higher than the V_BATLOWV threshold. When the safety timer expires, the STAT pin is blinking at 1 Hz to report a safety timer expiration fault.

During IINDPM/VINDPM regulation, or thermal regulation, the safety timer counts at a half clock rate, because the actual charge current is likely below the setting. For example, if the charger is in input current regulation throughout the whole charging cycle, and the safety time is set to 10 hours, the safety timer will expire in 20 hours.

During faults of BAT_FAULT, NTC_FAULT that lead to charging suspend, the safety timer is suspended as well. Once the fault goes away, the timer resumes. If the user stops the current charging cycle, and starts it again, the timer gets reset (toggle of CE pin).