Datasheet > NCP1252

NCP1252

更新时间： 2024-09-18 05:52:03

品牌	Logo	应用领域
安森美 - ONSEMI		/
页数	文件大小	规格书
17页	249K
描述
Flyback Applications

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

NCP1252 数据手册

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. 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 SOIC8 package saves

PCB space and represents a solution of choice in cost sensitive project.

http://onsemi.com

OFFLINE CONTROLLER

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

• Delayed Operation Upon Start−up via an Internal Fixed Timer

• Adjustable Soft−start Timer

SOIC−8

CASE 751

SUFFIX D

PIN CONNECTIONS

• 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

• Ready for Updated No Load Regulation Specifications

• SOIC−8 Package

DRV

GND

(Top View)

MARKING DIAGRAM

1252X

ALYWX

• This is a Pb−Free Device

Typical Applications

• Power Supplies for PC Silver Boxes, Games Adapter...

• Flyback and Forward Converter

1252

= Specific Device Code

= A or B Version

= Assembly Location

= Wafer Lot

= Year

= Work Week

= Pb−Free Package

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 2 of this data sheet.

Publication Order Number:

April, 2009 − Rev. 1

NCP1252/D

12 3 4 5 6 7...17

中文翻译

下载PDF

与NCP1252相关器件

型号	品牌	获取价格	描述	数据表
NCP1252_16	ONSEMI	获取价格	Current Mode PWM Controller for Forward and Flyback Applications
NCP1252ADR2G	ONSEMI	获取价格	Flyback Applications
NCP1252APG	ONSEMI	获取价格	Current Mode PWM Controller for Forward and Flyback Applications
NCP1252BDR2G	ONSEMI	获取价格	Flyback Applications
NCP1252CDR2G	ONSEMI	获取价格	Current Mode PWM Controller for Forward and Flyback Applications
NCP1252DDR2G	ONSEMI	获取价格	PWM 控制器，电流模式，用于正向和反激应用
NCP1252EDR2G	ONSEMI	获取价格	Current Mode PWM Controller for Forward and Flyback Applications
NCP1253	ONSEMI	获取价格	Current-Mode PWM Controller for Off-line Power Supplies
NCP1253_12	ONSEMI	获取价格	Current-Mode PWM Current-Mode PWM Power Supplies
NCP1253ASN100T1G	ONSEMI	获取价格	Current-Mode PWM Controller for Off-line Power Supplies