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NCP1252 Datasheet PWM Controller

Manufacturer: onsemi

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Overview

Current Mode PWM Controller for Forward and Flyback Applications NCP1252 The NCP1252 controller offers everything needed to build cost− effective and reliable ac−dc switching supplies dedicated to ATX power supplies.

Thanks to the use of an internally fixed timer, NCP1252 detects an output overload without relying on the auxiliary Vcc.

A Brown−Out input offers protection against low input voltages and improves the converter safety.

Key Features

  • Peak Current Mode Control.
  • Adjustable Switching Frequency up to 500 kHz.
  • Jittering Frequency 5% of the Switching Frequency.
  • Latched Primary Over Current Protection with 10 ms Fixed Delay.
  • Delay Extended to 150 ms in E Version.
  • Delayed Operation Upon Start.
  • up via an Internal Fixed Timer (A, B and C versions only).
  • Adjustable Soft.
  • start Timer.
  • Auto.
  • recovery Brown.
  • Out Detection.
  • UC384X.
  • like UVLO Thresholds.

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