Current-Mode PWM Controller for Off-line Power Supplies
●The NCP1250 is a highly integrated PWM controller capable of delivering a rugged and high performance offline power supply in a tiny TSOP−6 package. With a supply range up to 28 V, the controller hosts a jittered 65 kHz or 100 kHz switching circuitry operated in peak current mode control.
●Features
●Fixed−Frequency 65 or 100 kHz Current−Mode Control Operation
●Internal and Adjustable Over Power Protection (OPP) Circuit
●Frequency Foldback Down to 26 kHz and Skip−Cycle in Light Load Conditions
●Internal Ramp Compensation
●Internal Fixed 4 ms Soft−Start
●100 ms Timer−Based Auto−Recovery Short−Circuit Protection
●Frequency Jittering in Normal and Frequency Foldback Modes
●Option for Auto−Recovery or Latched Short−Circuit Protection
●OVP Input for Improved Robustness
●Up to 28 V VCCOperation
●+300 mA / −500 mA Source/Sink Drive Capability
●Less than 100 mW Standby Power at High Line
●EPS 2.0 Compliant
●These are Pb−Free Devices
●Typical Applications
●ac−dc Converters for TVs, Set−top Boxes and Printers
●Offline Adapters for Notebooks and Netbooks
