Datasheet > NCP1282

NCP1282

更新时间： 2024-09-18 04:37:59

品牌	Logo	应用领域
安森美 - ONSEMI		控制器
页数	文件大小	规格书
23页	281K
描述
High Performance Active Clamp/Reset PWM Controller Featuring 500 V Startup

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NCP1282 数据手册

NCP1282

High Performance Active

Clamp/Reset PWM Controller

Featuring 500 V Startup

The NCP1282 is a voltage mode controller designed for ac−dc or

dc−dc converters requiring high−efficiency and low parts count. This

controller incorporates two in phase outputs with an overlap delay to

prevent simultaneous conduction and facilitates soft switching. The

main output is designed for driving a forward converter primary

MOSFET. The secondary output is designed for driving an active

clamp circuit MOSFET, a synchronous rectifier on the secondary

side, or an asymmetric half bridge circuit.

The NCP1282 reduces component count and system size by

incorporating high accuracy on critical specifications such as

maximum duty cycle limit, undervoltage detector and overcurrent

threshold. Two distinctive features of the NCP1282 are soft−stop and

a cycle skip current limit with a time threshold. Soft−stop circuitry

powers down the converter in a controlled manner if a severe fault is

detected. The cycle skip detector enables a soft−stop sequence if a

continuous overcurrent condition is present.

http://onsemi.com

MARKING

DIAGRAM

SO−16

D SUFFIX

CASE 751B

NCP1282BG

AWLYWW

= Assembly Location

WL, L = Wafer Lot

= Year

WW, W = Work Week

= Pb−Free Package

Additional features found in the NCP1282 include line feed−

forward, frequency synchronization up to 1.0 MHz, cycle−by−cycle

current limit with leading edge blanking (LEB), independent under

and overvoltage detectors, adjustable output overlap delay,

programmable maximum duty cycle, internal startup circuit and

soft−start.

ORDERING INFORMATION

†

Device

Package

Shipping

NCP1282BDR2G

SO−16

2500 / Tape & Reel

(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.

Features

• Dual Control Outputs with Adjustable Overlap Delay

• >2.0 A Output Drive Capability

• Soft−Stop Powers Down Converter in a Controlled

Manner

• Cycle−by−Cycle Current Limit

• Cycle Skip Initiated if Continuous Current Limit

Condition Exists

• Voltage Mode Operation with Input Voltage

Feedforward

• Fixed Frequency Operation up to 1.0 MHz

• Bidirectional Frequency Synchronization

• Minimum Operating Voltage of 8.5 V Ensures Enough

Voltage is Available for Driving High Voltage MOSFETs

• Accurate Programmable Maximum Duty Cycle Limit

• Programmable Maximum Volt−Second Product

• Programmable Soft−Start

• Internal 500 V Startup Circuit

• Precision 5.0 V Reference

• This is a Pb−Free Device*

Typical Applications

• High Power Consumer Electronics

• High Power AC−DC Converters

• High Power DC−DC Converters

• ATX Power Supplies

• Independent Line Undervoltage and Overvoltage

Detectors

*For additional information on our Pb−Free strategy and soldering details, please

downloadthe ON Semiconductor Soldering and Mounting Techniques Reference

Manual, SOLDERRM/D.

Semiconductor Components Industries, LLC, 2006

Publication Order Number:

December, 2006 − Rev. 0

NCP1282/D

12 3 4 5 6 7...23

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与NCP1282相关器件

型号	品牌	获取价格	描述	数据表
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
NCP1294ED16	ONSEMI	获取价格	Enhanced Voltage Mode PWM Controller
NCP1294ED16G	ONSEMI	获取价格	Enhanced Voltage Mode PWM Controller
NCP1294EDBR2G	ONSEMI	获取价格	Flyback, Boost, Forward PWM Controller
NCP1294EDR16	ONSEMI	获取价格	Enhanced Voltage Mode PWM Controller
NCP1294EDR16G	ONSEMI	获取价格	Enhanced Voltage Mode PWM Controller

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