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NCP1249D Key Features

  • either through a dedicated pin or via the VCC input
  • High-Voltage Current Source for Lossless Start-up Sequence
  • Automatic and Lossless X2 Capacitors Discharge Function
  • Internal and Adjustable Over Power Protection (OPP)
  • Up to 30 V VCC Maximum Rating
  • Internal Brown-Out Protection Circuit
  • +300 mA/ -500 mA Source/Sink Drive Capability
  • Extremely Low No-Load Standby Power via
  • Frequency Foldback Down to 26 kHz and Skip-Cycle
  • Adjustable Ramp pensation

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NCP1249D Description

NCP1249C, NCP1249D High-Voltage Current­Mode PWM Controller Featuring Peak Power Excursion and Self-Relaxing Off Mode The NCP1249 is a highly integrated high−voltage PWM controller http://onsemi. capable of delivering a rugged and high performance offline power supply with extremely low no−load consumption. With a supply range MARKING DIAGRAM up to 30 V, the controller hosts a jittered 65 kHz switching circuitry...