Product Overview NCP1380: Controller, Quasi-Resonant Current Mode For complete documentation, see the data sheet Product Description The NCP1380 is a high performance device aimed at 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 triggering 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. To improve the safety in the overload situations, the controller includes an Over Power Protection (OPP) circuit which clamps the delivered power at high-line. Safety-wise, a fixed internal timer relies on the feedback voltage to detect a fault. Once the timer elapses, the controller stops and stays latched for option A and C or enters auto-recovery mode for option B and D. Particularly well suited for adapter applications, the controller features a pin to implement either a combined overvoltage / overtemperature protection (version A and B) or a combined brownout / overvoltage protection (version C and D). Features • • • • • • • • • Benefits Quasi-resonant peak current mode control operation Valley switching operation with valley lockout Frequency foldback at light load Adjustable overpower 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 brownout (C and D versions) VCC range operation up to 28 V Applications • High efficiency operation • Provides for noise-immune operation • Improves light load efficiency End Products • AC-DC adapters for notebooks • Power AC-DC converters for adapters, TVs and set top boxes • Offline battery chargers • Auxiliary power supplies (flat TV, appliances) 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 NCP1380ADR2G Pb-free Active Flyback Current Mode Variable Yes 9 Yes Yes Yes 28 500 / 800 SOIC-8 Active Flyback Current Mode Variable Yes 9 Yes No Yes 28 500 / 800 SOIC-8 Active Flyback Current Mode Variable Yes 9 Yes Yes Yes 28 500 / 800 SOIC-8 Active Flyback Current Mode Variable Yes 9 Yes No Yes 28 500 / 800 SOIC-8 Halide free NCP1380BDR2G Pb-free Halide free NCP1380CDR2G Pb-free Halide free NCP1380DDR2G Pb-free Halide free Application Diagram For more information please contact your local sales support at www.onsemi.com Created on: 6/30/2016