Datasheet > NCP1280

NCP1280

更新时间： 2024-11-28 22:54:31

品牌	Logo	应用领域
安森美 - ONSEMI		控制器
页数	文件大小	规格书
18页	132K
描述
Active Clamp Voltage Mode PWM Controller for Off-Line Applications

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NCP1280 数据手册

NCP1280

Active Clamp Voltage Mode

PWM Controller for Off−Line

Applications

The NCP1280 provides a highly integrated solution for off−line

power supplies requiring high−efficiency and low parts count. This

voltage mode controller provides control outputs for driving a forward

converter primary MOSFET and an auxiliary MOSFET for active

clamp circuit. The second output with its programmable delay can also

be used for driving a synchronous rectifier on the secondary or for

asymmetric half bridge circuits. Incorporation of high voltage start−up

circuitry (with 700 V capability) reduces parts count and system

power dissipation. Additional features such as line UV/OV protection,

soft start, single resistor programmable (high) frequency oscillator,

line voltage feedforward, dual mode overcurrent protection and

maximum duty cycle control, allow converter optimization at minimal

cost. Compared to a traditional forward converter, an NCP1280 based

converter can offer significant efficiency improvements and system

cost savings.

http://onsemi.com

MARKING

DIAGRAM

SO−16

D SUFFIX

CASE 751B

NCP1280

AWLYWW

NCP1280= Device Code

= Assembly Location

= Wafer Lot

= Year

= Work Week

Features

PIN CONNECTIONS

• Internal High Voltage Start−Up Regulator (25 V to 700 V)

• Dual Control Outputs with Adjustable Overlap Delay

• Programmable Maximum Duty Cycle Control

• Single Resistor Oscillator Frequency Setting

• Fast Line Feedforward

• Line Under/Overvoltage Lockout

• Dual Mode Overcurrent Protection

• Programmable Soft Start

AUX

UV/OV

OUT1

GND

OUT2

SKIP

REF

MAX

• Precision 5.0 V Reference

ORDERING INFORMATION

Typical Applications

Device

NCP1280DR2

Package

Shipping†

• Off−Line Power Converters in 100−500 W Range

• Desktop Power Supplies (High−End)

• Industrial Power Supplies

SO−16

2500/Tape & Reel

†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.

• Plasma/LCD TV Front−End

out

TX1

Start−up

−

Drive

clamp

(100 V − 425 V)

out

(3.3 V)

out

Feedforward

−

NCP1280

UV/OV

OUT1

OUT2

Driver

Overlap

Delay

Error

Opto

Amplifier

Figure 1. Forward Converter for Off−line Applications Using PFC Inputs

Semiconductor Components Industries, LLC, 2004

Publication Order Number

April, 2004 − Rev. 1

NCP1280/D

12 3 4 5 6 7...18

中文翻译

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与NCP1280相关器件

型号	品牌	获取价格	描述	数据表
NCP1280/D	ETC	获取价格	Active Clamp Voltage Mode PWM Controller For Off-Line Applications
NCP1280_05	ONSEMI	获取价格	Active Clamp Voltage Mode PWM Controller for Off-Line Applications
NCP1280DR2	ONSEMI	获取价格	Active Clamp Voltage Mode PWM Controller for Off-Line Applications
NCP1280DR2G	ONSEMI	获取价格	Active Clamp Voltage Mode PWM Controller for Off-Line Applications
NCP1282	ONSEMI	获取价格	High Performance Active Clamp/Reset PWM Controller Featuring 500 V Startup
NCP1282BDR2G	ONSEMI	获取价格	High Performance Active Clamp/Reset PWM Controller Featuring 500 V Startup
NCP1288	ONSEMI	获取价格	Fixed Frequency Current Mode Controller for Flyback Converters
NCP1288_11	ONSEMI	获取价格	Fixed Frequency Current Mode Controller for Flyback Converters
NCP1288BD65R2G	ONSEMI	获取价格	Fixed Frequency Current Mode Controller for Flyback Converters
NCP1294	ONSEMI	获取价格	Enhanced Voltage Mode PWM Controller

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