1. Any of three kinds of fault trigger fault bit toggle to 1 OT: Temp>155℃ OC：short to battery/supply or over-current condition. OL：open load when OUTPUT OFF 2. base on truth table below, user can recognize the fault type   Output OFF(0) Output ON(1) HS Open load/ short to BAT（OC） short to GND（OC）/OT LS Open load/ short to GND（OC） short to BAT（OC）/OT   Open load(OL) and Short circuit base on Vds><Vout（FLT-TH） 33879   33880   OL： Vds<VFLT-TH && Output OFF Short to BAT: Vds > VFLT-TH && OC Short to GND: Vds< VFLT-TH &&OC