SLUAAH3 October 2021 UCC28056
Cycle-by-cycle peak current protection (OCP1) terminates the on-time (TON) duration early if the current sense voltage rises above 0.5 V. This current protection method limits the peak inductor current, thus avoiding inductor saturation or damage to the power stage. The waveform in Figure 4-4 shows the controller enters into OCP1. The OCP1 comparator is enabled from the DRV rising edge with a 450-ns blanking time.