Product Overview NCP1271: PWM Controller, Soft-Skip™ Standby, with Adjustable Skip Level and External Latch For complete documentation, see the data sheet Product Description The NCP1271 represents a new, pin to pin compatible, generation of the successful 7 pin current mode NCP12XX product series. The controller allows for excellent stand by power consumption by use of its adjustable Soft Skip mode and integrated high voltage startup FET. This proprietary Soft Skip also dramatically reduces the risk of acoustic noise. This allows the use of inexpensive transformers and capacitors in the clamping network. Internal frequency jittering, ramp compensation, timer based fault detection and a latch input make this controller an excellent candidate for converters where ruggedness and component cost are the key constraints. Features Benefits • Short Circuit Protection Independent of the Auxiliary Winding • Adjustable Soft Skip Mode • Internal High-Voltage Start-up • Efficient protective circuitry • Provides improved efficiency at light loads and reduces the acoustic noise • Clean and loss less start-up sequence and reduces component count • 5% Current Limit Accuracy over the Full Temperature Range • Internal Latch for Easy Implementation of Overvoltage and Overtemperature Protection • Frequency Jittering for Softened EMI Signature • +500 mA/800 mA Peak Current Drive Capability Applications End Products • ACDC Adapters • Consumer Electronic Power Supplies • • • • • Offline Battery Chargers STB, DVD, DVDR Notebooks LCD Monitors Printers 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 NCP1271D100R2G Pb-free Active Flyback Current Mode 100 Yes Yes Yes Yes Yes 20 500 / 800 SOIC-7 Active Flyback Current Mode 65 Yes Yes Yes Yes Yes 20 500 / 800 SOIC-7 Active Flyback Current Mode 100 Yes Yes Yes Yes Yes 20 500 / 800 PDIP-8 Active Flyback Current Mode 65 Yes Yes Yes Yes Yes 20 500 / 800 PDIP-8 Halide free NCP1271D65R2G Pb-free Halide free NCP1271P100G Pb-free Halide free NCP1271P65G Pb-free Halide free Application Diagram For more information please contact your local sales support at www.onsemi.com Created on: 6/30/2016