JAJSNC5 april 2023 LM5171-Q1
ADVANCE INFORMATION
Current soft start can be programmed with a ceramic capacitor CSS. Note that CSS also determines the retry frequency when the converter is at under overvoltage condition. The soft start completes when the SS pin voltage reaches approximately 3 V. Choose full load current start-up time within ΔTSS = 1 ms in FPWM configuration, the capacitor CSS can be chosen by :
When SS/DEM1 and SS/DEM2 are connected together, double the capacitance to maintain the same startup time. Here we select standard ceramic capacitor CSS = 33 nF.