NCP1252: Current Mode PWM Controller for Forward and Flyback Applications

The NCP1252 controller offers everything needed to build cost effective and reliable ac-dc switching supplies dedicated to ATX power supplies or any forward application. 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, the SOIC-8 package saves PCB space and represents a solution of choice in cost sensitive project.

技术特性
  • 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
  • Delayed Operation Upon Start−up via an Internal Fixed Timer
  • Adjustable Soft−start Timer
  • Auto−recovery Brown−Out Detection
  • UC384X−like UVLO Thresholds
  • Vcc Range from 9 V to 28 V with Auto−recovery UVLO
  • Internal 160 ns Leading Edge Blanking
  • Adjustable Internal Ramp Compensation
  • +500 mA / –800 mA Source / Sink Capability
  • Maximum 50% Duty Cycle: A Version
  • Maximum 80% Duty Cycle: B Version
  • Maximum 65% Duty Cycle: C Version
  • Ready for Updated No Load Regulation Specifications
  • SOIC−8 and PDIP−8 Packages
  • These are Pb−Free Devices
应用
  • Power supplies for PC silver boxes
  • Ac-dc adapter converter
  • Game Adapter
  • Flyback and Forward Application
终端产品
  • Desktops
封装图 PACKAGE DIMENSIONS

NCP1252封装图

订购信息 Ordering Information
产品 状况 Compliance 具体说明 封装 MSL* 容器 预算价格 (1千个数量的单价)
类型 外形 类型 数量
NCP1252ADR2G Active
Pb-free
Halide free
Current Mode PWM Controller for Forward and Flyback Applications SOIC-8 751-07 1 Tape and Reel 2500 $0.32
NCP1252APG Active
Pb-free
Halide free
Current Mode PWM Controller for Forward and Flyback Applications PDIP-8 626-05 Tube 50 $0.34
NCP1252BDR2G Active
Pb-free
Halide free
Current Mode PWM Controller for Forward and Flyback Applications SOIC-8 751-07 1 Tape and Reel 2500 $0.32
NCP1252CDR2G Active
Pb-free
Halide free
Current Mode PWM Controller for Forward and Flyback Applications SOIC-8 751-07 1 Tape and Reel 2500 $0.32
数据资料DataSheet下载
概述 文档编号/大小 版本
Current Mode PWM Controller for Forward and Flyback Applications NCP1252/D (94.0kB) 2