Datasheet4U Logo Datasheet4U.com

NCP1252 - PWM Controller

Description

This pin directly connects to an optocoupler collector.

out protection.

Monitors the primary current and allows the selection of the ramp compensation amplitude.

A resistor connected to ground fixes the switching frequency.

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.

📥 Download Datasheet

Datasheet preview – NCP1252

Datasheet Details

Part number NCP1252
Manufacturer onsemi
File Size 385.66 KB
Description PWM Controller
Datasheet download datasheet NCP1252 Datasheet
Additional preview pages of the NCP1252 datasheet.

📁 Similar Datasheet

  • NCP1212 - Current Mode PWM Controller (ON)
  • NCP1215 - Low Cost Variable OFF Time Switched Mode Power Supply Controller (ON)
  • NCP1216 - PWM Current-Mode Controller (ON)
  • NCP1225 - Low Standby Power SMPS Controller (ON)
  • NCP1232 - Microprocessor Monitor (ON)
  • NCP1280 - Active Clamp Voltage Mode PWM Controller (ON)
  • NCP1030 - Integrated DC-DC Converter (ON)
  • NCP1031 - Integrated DC-DC Converter (ON)
  • NCP1086 - 1.5A Adjustable and 3.3V Fixed Output Linear Regulator (ON)
  • NCP1410 - 250 mA Sync-Rect PFM Step-Up DC-DC Converter (ON)
Other Datasheets by ON Semiconductor
  • NCP1250 - Current-Mode PWM Controller
  • NCP1251 - Current-Mode PWM Controller
  • NCP12510 - Current-Mode PWM Controller
  • NCP1253 - Current-Mode PWM Controller
  • NCP1254 - Current-Mode PWM Controller
  • NCP1255 - Current-Mode PWM Controller
  • NCP1256 - Low Power Offline PWM Controller
  • NCP120 - Very Low Dropout Bias Rail CMOS Voltage Regulator

Full PDF Text Transcription

Click to expand full text
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. Finally a SOIC−8 package saves PCB space and represents a solution of choice in cost sensitive project.
Published: |