NCP1339
NCP1339 is QuasiResonant Controller manufactured by onsemi.
High-Voltage, QuasiResonant Controller featuring Valley Lock-Out and Power Saving Mode
The NCP1339 is a highly integrated quasi- resonant flyback controller capable of controlling rugged and high- performance off- line power supplies as required by adapter applications. With an integrated active X- cap discharge feature and power savings mode, the NCP1339 can enable no- load power consumption below 10 mW for 45 W notebook adapters.
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 toggles to a frequency foldback mode to eliminate switching losses. When the loop...
