NCP1212

更新时间： 2024-11-28 22:45:39

品牌	Logo	应用领域
安森美 - ONSEMI		转换器控制器
页数	文件大小	规格书
22页	203K
描述
Current Mode PWM Controller for Both Forward and Flyback Converters

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NCP1212 数据手册

NCP1212

Current Mode PWM

Controller for Both Forward

and Flyback Converters

NCP1212 is a high performance current mode PWM controller

specifically designed for off−line and DC−to−DC converter

applications. The device requires very few external components and

offers designer additional protection for better system reliability. The

device features a trimmed oscillator for precise Duty Cycle control,

accurate bandgap voltage reference, high gain error amplifier, current

sensing comparator and a high current totem pole output gate driver

that ideally drives the external power MOSFET. Additionally, the

device has built−in programmable Brownout Detect and Soft−Start

features to enhance system reliability. Also, the 48%/82% selectable

maximum turn on Duty Cycle control and external programmable

switching frequency capabilities make this device an ideal controller

for both forward and flyback configurations. This device is available

in both PDIP−8 and space saving SOIC−8 packages.

http://onsemi.com

MARKING

DIAGRAMS

SOIC−8

D SUFFIX

CASE 751

N1212

ALYW

PDIP−8

P SUFFIX

CASE 626

NCP1212

AWL

YYWW

Features

• Pb−Free Package is Available

• Trimmed Oscillator Charge and Discharge Current for Precise Duty

Cycle Control

= Assembly Location

WL, L = Wafer Lot

YY, Y = Year

WW, W = Work Week

• Internal High Accuracy Bandgap Voltage Reference

• Current Mode Operation up to 200 kHz

• Inherent Feed Forward Compensation

• Latching PWM for Cycle−by−Cycle Current Limiting

• High Current Totem Pole Output Gate Driver

• Low Startup and Operating Current

• Internal Undervoltage Lockout with Hysteresis

• Internal Leading Edge Blanking for Current Feedback

• Direct Interface with Optocoupler for Secondary Sensing

• Built−in Soft−Start Function, Programmable by External Capacitor

• User Programmable 48%/82% Maximum Duty Cycle Selection

• Output Overvoltage Protection Against Open Loop

• AC Line Brownout Detect Protection

PIN CONNECTIONS

SS/DMAX

VCC

BOK

DRV

GND

(Top View)

ORDERING INFORMATION

• Output Overload Protection Irrespective of Auxiliary Voltage Level

†

Device

Package

Shipping

NCP1212DR2

NCP1212P

SOIC−8

PDIP−8

2500 Tape & Reel

50 Units/Rail

Typical Applications

• ATX PC Power Supply

NCP1212PG

PDIP−8

50 Units/Rail

• Universal Input Wall Mount Adaptors

• CRT Monitor

• All Flyback and Forward SMPS Systems

(Pb−Free)

†For information on tape and reel specifications,

including part orientation and tape sizes, please

refer to our Tape and Reel Packaging Specifications

Brochure, BRD8011/D.

Semiconductor Components Industries, LLC, 2004

Publication Order Number:

October, 2004 − Rev. 2

NCP1212/D

12 3 4 5 6 7...22

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与NCP1212相关器件

型号	品牌	获取价格	描述	数据表
NCP1212/D	ETC	获取价格	Current Mode PWM Controller for Both Forward and Flyback Converters
NCP1212_05	ONSEMI	获取价格	Current Mode PWM Controller for Both Forward and Flyback Converters
NCP1212D	ONSEMI	获取价格	1A SWITCHING CONTROLLER, 200kHz SWITCHING FREQ-MAX, PDSO8, SOIC-8
NCP1212DR2	ONSEMI	获取价格	Current Mode PWM Controller for Both Forward and Flyback Converters
NCP1212DR2G	ONSEMI	获取价格	Current Mode PWM Controller for Both Forward and Flyback Converters
NCP1212P	ONSEMI	获取价格	Current Mode PWM Controller for Both Forward and Flyback Converters
NCP1212PG	ONSEMI	获取价格	Current Mode PWM Controller for Both Forward and Flyback Converters
NCP1215	ONSEMI	获取价格	Low Cost Variable OFF Time Switched Mode Power Supply Controller
NCP1215A	ONSEMI	获取价格	Low Cost Variable OFF Time Switched Mode Power Supply Controller
NCP1215ADR2	ONSEMI	获取价格	Low Cost Variable OFF Time Switched Mode Power Supply Controller

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