The NCP1340 is manufactured by Onsemi.

Overview

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 quasi−resonant current−mode flyback stage features a proprietary valley−lockout circuitry, ensuring stable valley switching. This system works down to the 6th valley and transitions to a frequency foldback mode to reduce switching losses. As the load decreases further, the NCP1340 enters quiet−skip mode to manage the power delivery. 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 over voltage and NTC−ready over temperature protection through a dedicated pin, and line removal detection to safely discharge the X2 capacitors when the line is removed.

Features

●QR Frequency Jittering
●New Quiet-Skip Technology
●Integrated HV Startup with Brownout Protection
●Valley Switching Operation with Valley Lockout
●Integrated X2 Capacitor Discharge Capability
●NTC Compatible Fault Pin
●High Drive Capability: -500 mA / +800 mA
●Latch input for OVP and OTP implementations

Applications

●Medium or High Power AC-DC Adapters
●Ultra High Density AC-DC Adapters

End Products

●Notebook Adpaters
●Flat TV SMPS
●Computer Power Supplies
●Phone and Tablet Adapters

Material Composition of NCP1340

There is no intentional use of Cadmium, Mercury, Hexavalent Chromium, Polybrominated biphenyls (PBBE), Polybrominated diphenyl ethers (PBDE), and four phthalates Bis(2-ethylhexyl) phthalate (DEHP), Butyl benzyl phthalate (BBP), Dibutyl phthalate (DBP), Diisobutyl phthalate(DIBP) (9 of the 10 RoHS banned substances) in NCP1340 or any of our other products.