Datasheet > NCP1561

NCP1561

更新时间： 2024-09-19 22:54:31

品牌	Logo	应用领域
安森美 - ONSEMI		控制器通信
页数	文件大小	规格书
22页	253K
描述
Push-Pull PWM Controller for 48 V Telecom Systems

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NCP1561 数据手册

NCP1561

Push−Pull PWM Controller

for 48 V Telecom Systems

The NCP1561 Push−Pull PWM controller contains all the features

and flexibility needed to implement high efficiency dc−dc converters

using voltage or current−mode control. This device can be configured

in any dual ended topology such as push−pull or half−bridge. It can

also be used for forward topologies requiring a 50% maximum duty

cycle. This device is ideally suited for 48 V telecom, 42 V automotive

systems and 12 V input applications.

The NCP1561 cost effectively reduce system part count by

incorporating a high voltage startup regulator, line undervoltage

detector, single resistor oscillator setting, dual mode overcurrent

protection, soft−start and single resistor feedforward ramp generator.

The oscillator frequency can be adjusted up to 250 kHz.

http://onsemi.com

MARKING

DIAGRAM

SO−16

D SUFFIX

CASE 751B

NCP1561

AWLYWW

Features

NCP1561= Device Code

= Assembly Location

= Wafer Lot

= Year

• Internal High Voltage Startup Regulator

• Minimum Operating Voltage of 21.5 V

• Voltage or Current−Mode Control Capability

• Single Resistor Oscillator Frequency Setting

• Adjustable Frequency up to 250 kHz

• Fast Line Feedforward

= Work Week

PIN ASSIGNMENTS

AUX

OUT1

• Line Undervoltage Lockout

RAMP_OUT

GND

• Dual Mode Overcurrent Protection

• Programmable Maximum Duty Cycle Control

• Maximum Duty Cycle Proportional to Line Voltage

• Programmable Soft−Start

OUT2

RAMP_IN

CSKIP

REF

MAX

• Precision 5.0 V Reference

Typical Applications

ORDERING INFORMATION

• 48 V Telecommunication Power Converters

• Industrial Power Converters

• 42 V Automotive Systems

†

Device

Package

Shipping

NCP1561DR2

SO−16

2500 Units/Reel

†For information on tape and reel specifications,

including part orientation and tape sizes, please

refer to our Tape and Reel Packaging Specification

Brochure, BRD8011/D.

TX1

Vin

−

Lout

OUT1

Startup

Feedforward

Cout

High Side

Driver

OUT2

OUT1

NCP1561

OUT2

Opto

Driver

Error

Amplifier

Figure 1. Half−Bridge Block Diagram

Semiconductor Components Industries, LLC, 2004

Publication Order Number

August, 2004 − Rev. 3

NCP1561/D

12 3 4 5 6 7...22

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与NCP1561相关器件

型号	品牌	获取价格	描述	数据表
NCP1561/D	ETC	获取价格	Dual Output PWM Controller
NCP1561DR2	ONSEMI	获取价格	Push-Pull PWM Controller for 48 V Telecom Systems
NCP1561DR2G	ONSEMI	获取价格	暂无描述
NCP1562	ONSEMI	获取价格	300 W 80 PLUS ATX Reference Design
NCP1562A	ONSEMI	获取价格	High Performance Active Clamp/Reset PWM Controller
NCP1562ADBR2G	ONSEMI	获取价格	High Performance Active Clamp/Reset PWM Controller
NCP1562ADR2G	ONSEMI	获取价格	High Performance Active Clamp/Reset PWM Controller
NCP1562B	ONSEMI	获取价格	High Performance Active Clamp/Reset PWM Controller
NCP1562BDBR2G	ONSEMI	获取价格	High Performance Active Clamp/Reset PWM Controller
NCP1562BDR2G	ONSEMI	获取价格	High Performance Active Clamp/Reset PWM Controller

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