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NCP1253 Key Features

  • Fixed-Frequency 65 kHz or 100 kHz Current-Mode Control
  • Frequency Foldback Down to 26 kHz and Skip-Cycle in Light Load
  • Adjustable Ramp pensation
  • Internally Fixed 4 ms soft-start
  • Timer-based Auto-Recovery or Latched Short-Circuit Protection
  • Frequency Jittering in Normal and Frequency Foldback Modes
  • Latched OVP on VCC
  • Up to 28 V VCC Operation
  • Extremely Low No-load Standby Power
  • These are Pb-Free Devices

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NCP1253 Description

Pin Name 1 GND 2 FB Function − Feedback pin 3 NC Non−connected pin 4 CS Current sense + ramp pensation 5 VCC Supplies the controller protects the IC 6 DRV Driver output Description The controller ground. Hooking an optocoupler collector to this pin will allow regulation. The pin is electrically inert and can be grounded if necessary This pin monitors the primary peak current but also offers a means to introduce...