The WT7161R is a high performance multi-mode (CCM/Valley Switching) Flyback PWM controller. It is specifically designed to work with USB PD controller to provide a total solution for USB PD or a programmable power adapter. The WT7161R helps to improve the overall efficiency and optimize the product performance. It operates in continuous Current Mode (CCM) during heavy load and operates in discontinuous conduction mode with valley switching during light load.