ONSEMI NCP1343AMDCDBD1R2G

NCP1343 is a highly integrated quasi-resonant flyback controller suitable for designing high−performance off−line power converters. The NCP1343 features a proprietary valley lockout circuitry, ensuring stable valley switching. This system works down to the 6th valley and transitions to frequency foldback mode to reduce switching losses. As load decreases further, NCP1343 enters quie-skip mode to manage the power delivery while minimizing acoustic noise. Additionally, It integrates power excursion mode (PEM) to minimize transformer size in designs requiring high transient load capability. If transient load capability is not desired, the NCP1342 offers the same performance and features without PEM. To help ensure converter ruggedness, the NCP1343 implements several key protective features such as internal brownout detection, a non−dissipative overpower protection for constant maximum output power regardless of input voltage.