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/Title (NCP1340 - High-Voltage, Quasi-Resonant, Controller Featuring Valley Lock-Out Switching)
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Acrobat Distiller 10.1.16 (Windows)
BroadVision, Inc.
2018-06-26T11:01:40-07:00
2018-06-26T10:38:51-07:00
2018-06-26T11:01:40-07:00
application/pdf
NCP1340 - High-Voltage, Quasi-Resonant, Controller Featuring Valley Lock-Out Switching
s2190c
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).
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