ZHCSIQ0F August 2018 – August 2020 TPS2120 , TPS2121
PRODUCTION DATA
Independent output overvoltage protection is available for both IN1 and IN2. The VREF comparator on the OV1 and OV2 pins allows for the overvoltage protection thresholds to be adjusted independently, allowing for different overvoltage thresholds on each channel. When overvoltage is engaged, the corresponding channel will turn off immediately if the pin reaches VREF, 1.06 V (typical). On this design, the overvoltage thresholds are triggered at roughly 1-V higher than the nominal input voltages. On IN1, the overvoltage resistor divider was programmed to be 6.08 V, where as the divider on IN2 was programmed to be 3.96 V. The OV resistor calculations are shown in Equation 6 and Equation 7.