NCP1341 High-Voltage, Quasi-Resonant, Controller Featuring Valley Lock-Out Switching

PublishTime：2021-10-12

●The NCP1341 is a highly integrated quasi−resonant flyback controller suitable for designing high−performance off−line power converters. With an integrated active X2 capacitor discharge feature, the NCP1341 can enable no−load power consumption below 30 mW.
●The NCP1341 features a proprietary valley−lockout circuitry, ensuring stable valley switching. This system works down to the 6thvalley and transitions to frequency foldback mode to reduce switching losses. As the load decreases further, the NCP1341 enters quiet−skip mode to manage the power delivery while minimizing acoustic noise.
●The NCP1341 integrates power excursion mode (PEM) to minimize transformer size in designs requiring high transient load capability. If transient load capability is not desired, the NCP1340 offers the same performance and features without PEM.
●To help ensure converter ruggedness, the NCP1341 implements several key protective features such as internal brownout detection, anon−dissipative Over Power Protection (OPP) for constant maximum output power regardless of input voltage, a latched overvoltage and NTC−ready overtemperature protection through a dedicated pin, and line removal detection to safely discharge the X2 capacitors when the ac line is removed.

Brand of Product：	ON Semiconductor
Part#：	NCP1341 、 NCP1341A1D1R2G 、 NCP1341B1DR2G 、 NCP1341B1D1R2G 、 NCP1341B4D1R2G 、 NCP1341B5D1R2G 、 NCP1341xx More Part#
Product Category：	High-Voltage Quasi-Resonant Controller 、 highly integrated quasi−resonant flyback controller More
Application：	More
Data Type：	Datasheet More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：	SOIC−9;SOIC−8
Language：	English Chinese Chinese and English Japanese
Date of Creation：	January, 2021
Version Number：	Rev. 7
Data Encoding：	NCP1341/D
Data Size：	1.2 MB

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