SLUSBP5E March 2014 – July 2018 TPS92601-Q1 , TPS92602-Q1
UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.
Each controller achieves peak-current-mode control using a comparator that monitors the current through the external boost FET at the ISNSx pin by comparing it with the voltage on the COMPx pin. A redundant current-limit comparator, which compares the voltage on the ISNSx pin with a typical 100-mV reference voltage, limits the current through the external boost FET. If the voltage on the ISNSx pin exceeds this typical 100-mV threshold, the on-cycle of the respective boost controller immediately terminates. The current-limit comparator has a lead-edge blanking time to avoid any unwanted triggering of the current limit during switch-on of the external boost FET. One can set the current-limit level with an external resistor, as calculated with the following equation.