JAJSP05B May 2023 – October 2023 TPS2000E , TPS2001E , TPS2068E , TPS2069E
PRODUCTION DATA
The FLT open-drain output is asserted (active low) during an overload or overtemperature condition. A 8-ms deglitch on both the rising and falling edges avoids false reporting at start-up and during transients. A current limit condition shorter than the deglitch period clears the internal timer upon termination. The deglitch timer does not integrate multiple short overloads and declare a fault. This is also true for exiting from a faulted state. An input voltage with excessive ripple and large output capacitance may interfere with operation of FLT around IOS as the ripple drives the TPS20xxE in and out of current limit.
If the TPS20xxE are in current limit and the overtemperature circuit goes active, FLT goes true immediately; however, the exiting this condition is deglitched. FLT is tripped just as the knee of the constant-current limiting is entered. Disabling the TPS20xxE clears an active FLT as soon as the switch turns off. FLT is high impedance when the TPS20xxE are disabled or in undervoltage lockout (UVLO).