The EN/FLT pin of the UCC5713x can report a fault signal to the DSP/MCU with the adjustable fault clear time. When a fault is detected through the OCP pin, internal TSD, or the UVLO, the EN/FLT pin is pulled down to COM internally. The EN/FLT pin will stay low until the fault is removed and the internal pulldown FET turns off, the voltage on the pin charged up with external pull-up voltage. The t_FLTC is determinded by the exponential charging characteristics of the capacitor where the time constant is set by R_FLTC and C_FLTC as shown in Simplified Application Diagram, the R_FLTC is pulled up to external VDD. C_FLTC is connected from EN/FLT to COM. EN/FLTis weakly pulled up to 5V internally through a R_ENU. The t_FLTC can be calculated by the folumla below if it is pullup to 5V rail.

The UCC5713x provides an enable function that can allow shutdown or enable the output. When the EN/FLT is pulled up above the V_ENH, the output is following IN, when it is pulled down below V_ENL, the output will stay low. The relationship for input, output and enable can be found in Timing Diagram.