NCP1380DDR2G Datasheet PDF - ON Semiconductor

●QUASI−RESONANT PWM CONTROLLER FOR HIGH POWER AC−DC WALL ADAPTERS

●The NCP1380 hosts a high−performance circuitry aimed to powering quasi−resonant converters. Capitalizing on a proprietary valley−lockout system, the controller shifts gears and reduces the switching frequency as the power loading becomes lighter. This results in a stable operation despite switching events always occurring in the drain−source valley. This system works down to the 4th valley and toggles to a variable frequency mode beyond, ensuring an excellent standby power performance.

●Features

●•Quasi−Resonant Peak Current−Mode Control Operation

●•Valley Switching Operation with Valley−Lockout for Noise−Immune Operation

●•Frequency Foldback at Light Load to Improve the Light Load Efficiency

●•Adjustable Over Power Protection

●•Auto−Recovery or Latched Internal Output Short−Circuit Protection

●•Fixed Internal 80 ms Timer for Short−Circuit Protection

●•Combined Overvoltage and Overtemperature Protection (A and B Versions)

●•Combined Overvoltage Protection and Brown−Out (C and D Versions)

●•+500 mA / −800 mA Peak Current Source/Sink Capability

●•Internal Temperature Shutdown

●•Direct Optocoupler Connection

●•Extended VCCRange Operation Up to 28 V

●•Extremely Low No−Load Standby Power

●•SO−8 Package

●•These Devices are Pb−Free and are RoHS Compliant

●Typical Applications

●•High Power ac−dc Converters for TVs, Set−Top Boxes etc.

●•Offline Adapters for Notebooks