NCP1340 High-Voltage,Quasi-Resonant, Controller Featuring Valley Lock-Out Switching

PublishTime：2021-08-11

●The NCP1340 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 NCP1340 can enable no−load power consumption below 30 mW.
●The NCP1340 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 the load decreases further, the NCP1340 enters quiet−skip mode to manage the power delivery while minimizing acoustic noise.
●To help ensure converter ruggedness, the NCP1340 implements several key protective features such as internal brownout detection, a non−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.
●If transient load capability is desired, the NCP1341 offers the same performance and features with the addition of power excursion mode(PEM).
●Features
■Integrated High−Voltage Startup Circuit with Brownout Detection
■Integrated X2 Capacitor Discharge Capability
■Wide VCC Range from 9 V to 28 V
■28 V VCC Overvoltage Protection
■Abnormal Overcurrent Fault Protection for Winding Short Circuit orSaturation Detection
■Internal Temperature Shutdown
■Valley Switching Operation with Valley−Lockout for Noise−FreeOperation
■Frequency Foldback with 25 kHz Minimum Frequency Clamp forIncreased Efficiency at Light Loads
■Skip Mode with Quiet−Skip Technology for Highest PerformanceDuring Light Loads
■Minimized Current Consumption for No Load Power Below 30 mW
■Frequency Jittering for Reduced EMI Signature
■Latching or Auto−Recovery Timer−Based Overload Protection
■Adjustable Overpower Protection (OPP)
■Fixed or Adjustable Maximum Frequency Clamp
■Fault Pin for Severe Fault Conditions, NTC Compatible for OTP
■4 ms Soft−Start Timer

Brand of Product：	ON Semiconductor
Part#：	NCP1340 、 NCP1340A3D1R2G 、 NCP1340B1DR2G 、 NCP1340B3D1R2G 、 NCP1340B4D1R2G 、 NCP1340B5D1R2G 、 NCP1340A6DR2G 、 NCP1340B6DR2G 、 NCP1340B7D1R2G 、 NCP1340B8D1R2G More Part#
Product Category：	Lock-Out Switching 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−8;SOIC−9
Language：	English Chinese Chinese and English Japanese
Date of Creation：	August, 2019
Version Number：	Rev. 12
Data Encoding：	NCP1340/D
Data Size：	1.3 MB

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