SLUSD37E October 2017 – November 2019 UCC28056
The UCC28056 controller provides leading light-load efficiency and standby power by implementing Burst mode of operation with the following key features:
Two comparator thresholds applied to the COMP pin voltage provide Burst Mode Operation. Switching halts after four soft-OFF cycles when the COMP pin voltage falls below the VBstFall threshold. Switching resumes with four Soft-ON cycles, when the COMP pin voltage rises above the VBstRise threshold. The average voltage of these two thresholds represents approximately 11% VCOMaxfor UCC28056/C and 16% VCOMax for UCC28056A/B. The power delivered during Burst ON is approximately 11% of maximum input power for UCC28056/C.