Product Overview NCP1336: Controller, Quasi-Resonant, Current Mode, with HV Start-Up For complete documentation, see the data sheet Product Description The NCP1336 hosts a high-performance circuitry aimed to powering quasi-resonant converters. Capitalizing on a novel valleylockout 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. The controller takes benefit of a high-voltage start-up current source to provide a quick and lossless power-on sequence. To improve the safety in overload situations, the controller includes an Over Power Protection circuit which clamps the delivered power at high-line. Safety-wise, an adjustable timer relies on the feedback voltage to detect a fault. On version B, this fault triggers a triplehiccup on the VCC pin which naturally reduces the average input power drawn by the converter. On version A, when a fault is detected, the controller is latched-off. Particularly well suited for adapter applications, the controller features two latch inputs: one dedicated to Over Temperature protection (OTP) which offers an easy means to connect a pull-down temperature sensor like an NTC, and a second one more classical that can be used ot performa an accurate Over voltage Protection. Finally, a brownout pin whcih stops the circuit operation in presence of a low mains condition is included. Features Benefits • Valley Switching Operation with Valley-Lockout • Loss-free Adjustable Over Power Protection • Auto-recovery or Latched Short-Circuit Protection with adjustable timer • Dedicated Overtemperature Protection Input • Brown Out Protection • High voltage startup current source • Improved efficiency with noise immunity • Limits the peak current according to input line voltage • Versatile short circuit protection for improved reliability • Allows direct connection to NTC for accurate OTP • Protects against drops in input mains voltage • Provides a quick and lossless power-on sequence Applications End Products • High Power Ac-Dc converters • Notebook Adapters • Flat TV SMPS Part Electrical Specifications Product Compliance Status Topolog y Control Mode fsw Typ (kHz) StandUVLO by Mode (V) Short Circuit Protecti on Latch Soft Start VCC Max Drive (V) Cap. (mA) Packag e Type NCP1336ADR2G Pb-free Active Flyback Current Mode Variable Yes 9 - 15 Yes Yes Yes 28 500 / 800 SOIC14 NB Active Flyback Current Mode Variable Yes 9 - 15 Yes Yes Yes 28 500 / 800 SOIC14 NB Halide free NCP1336BDR2G Pb-free Halide free Application Diagram For more information please contact your local sales support at www.onsemi.com Created on: 6/30/2016