Soft−SkipMode Standby PWM Controller with Adjustable Skip Level and External Latch
●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.
●Features
●•Fixed−Frequency Current−Mode Operation with Ramp
● Compensation and Skip Cycle in Standby Condition
●•Timer−Based Fault Protection for Improved Overload Detection
●•“Soft−Skip Mode” Technique for Optimal Noise Control in Standby
●•Internal High−Voltage Startup Current Source for Lossless Startup
●•5% Current Limit Accuracy over the Full Temperature Range
●•Adjustable Skip Level
●•Internal Latch for Easy Implementation of Overvoltage and
●Overtemperature Protection
●•Frequency Jittering for Softened EMI Signature
●•+500 mA/−800 mA Peak Current Drive Capability
●•Sub−100 mW Standby Power can be Achieved
●•Pin−to−Pin Compatible with the Existing NCP120X Series
●•This is a Pb−Free Device
●Typical Applications
●•AC−DC Adapters for Notebooks, LCD Monitors
●•Offline Battery Chargers
●•Consumer Electronic Appliances STB, DVD, DVDR
