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NCP1248 Key Features

  • Fixed-Frequency Current-Mode Operation using 65 kHz/100 kHz
  • Frequency Foldback then Skip Mode for Maximized Performance
  • Timer-Based Overload Protection with Latched (Option A)
  • High-voltage Current Source with Brown-Out Detection and
  • Frequency Modulation for Softened EMI Signature
  • Adjustable Overpower Protection Dependant on the Bulk Voltage
  • Latch-off Input bined with the Overpower Protection
  • VCC Operation up to 28 V, With Overvoltage Detection
  • 500/800 mA Source/Sink Drive Peak Current Capability

Related onsemi Datasheets

Part Number Description
NCP1240 Fixed Frequency Current-Mode Controller
NCP12400 Fixed Frequency Current-Mode Controller
NCP1244 Fixed Frequency Controller
NCP1246 Fixed Frequency Controller
NCP1247 Fixed Frequency Controller

NCP1248 Description

NCP1248 Fixed Frequency Current Mode Controller for Flyback Converters The NCP1248 is a new fixed-frequency current-mode controller featuring the Dynamic Self-Supply. This function greatly simplifies http://onsemi. the design of the auxiliary supply and the VCC capacitor by activating the internal startup current source to supply the controller during start-up, transients, latch, stand-by etc.