首页 » 解决方案 » ADI ADuM540x四路带DC转换器的数字隔离方案

ADI ADuM540x四路带DC转换器的数字隔离方案

作者:  时间:2009-06-08 09:49  来源:eaw
ADI 公司的ADuM5401/ADuM5402/ADuM5403/ADuM5404是四路带DC转换器的数字隔离器,集成了isoPower隔离的DC/DC转换器. ADuM540x采用iCoupler技术,DC/DC转换器可提供稳压的500mW功率,从5V输入得到5V输出或从3.3V输入得到3.3V输出电压,信号隔离从直流到25 Mbps (NRZ),高温工作到105度C,共模瞬态防卫大于25KV/us,主要应用在RS-232/RS-422/RS-485 收发器,电源起动偏置和栅极驱动器,绝缘传感器接口和工业PLC.本文介绍了ADuM540x主要特性, 方框图和ADuM540x评估板电路图和材料清单(BOM).

Quad-Channel Isolators with Integrated DC-to-DC Converter ADuM5401/ADuM5402/ADuM5403/ADuM5404

The ADuM5401/ADuM5402/ADuM5403/ADuM54041 devices are quad-channel digital isolators with isoPower, an integrated, isolated dc-to-dc converter. Based on the Analog Devices, Inc., iCoupler technology, the dc-to-dc converter provides up to 500 mW of regulated, isolated power at either 5.0 V from a 5.0 V input supply or 3.3 V from a 3.3 V supply. This eliminates the need for a separate, isolated dc-to-dc converter in low power, isolated designs. The iCoupler chip scale transformer technology is used to isolate both the logic signals and the magnetic components of the dc-to-dc converter. The result is a small form factor, total isolation solution.

The ADuM5401/ADuM5402/ADuM5403/ADuM5404 isolators provide four independent isolation channels in a variety of channel configurations and data rates (see the Ordering Guide for more information).

isoPower uses high frequency switching elements to transfer power through its transformer. Special care must be taken during printed circuit board (PCB) layout to meet emissions standards. Refer to Application Note AN-0971 for details on board layout considerations.

ADuM540x主要特性:

isoPower integrated, isolated dc-to-dc converter

Regulated 3.3 V or 5.0 V output

Up to 500 mW output power

Quad dc-to-25 Mbps (NRZ) signal isolation channels

Schmitt trigger inputs

16-lead SOIC package with >8.0 mm creepage

High temperature operation: 105℃

High common-mode transient immunity: >25 kV/μs

Safety and regulatory approvals

UL recognition

2500 V rms for 1 minute per UL1577

CSA Component Acceptance Notice #5A (pending)

VDE certificate of conformity (pending)

DIN V VDE V 0884-10 (VDE V 0884-10):2006-12

VIORM = 560 V peak

ADuM540x应用:

RS-232/RS-422/RS-485 transceivers

Industrial field bus isolation

Power supply startup bias and gate drives

Isolated sensor interfaces

Industrial PLCs



图1.ADuM540x方框图

ADuM540x评估板

The ADuM540x evaluation board can be used with iCoupler isolation products in the wide body SOP16 package. The evaluation board supports the common pad positions for power, ground, and I/O pins found in nearly all of the iCoupler products and is a configurable board that can be adapted to many iCoupler products.

SUPPORTED iCoupler MODELS

ADuM130x

ADuM131x

ADuM140x

ADuM141x

ADuM240x

ADuM330x

ADuM340x

ADuM540x

ADuM520x

ADuM5000

ADuM540x评估板主要特性:

Convenient connections for power through screw terminal blocks

Add-on BNC connector for 50 Ω signal sources

On-board signal routing

Support for signal wrap back

Simple signal paths to reduce transmission line effects

Pull-up and pull-down provided for control lines

Support for isoPower

Project area that supports surface-mount and through hole devices



图2.ADuM540x评估板外形图



图3.ADuM540x评估板电路图

ADuM540x评估板材料清单(BOM):

相关推荐

电源管理IC即将爆发 解析未来四大市场趋势

电源管理  DC-DC  2013-05-08

Vicor发布高密度AC-DC前端模块

Vicor  AC前端  AC-DC  2012-11-16

Picor新产品QuietPower QPI-21

Vicor  DC-DC变换器  QPI-21  2012-03-26

Picor新产品Cool-Power PI3106隔离型DC-DC转换器

element14引RECOM的最新电源管理解决方案

element14  AC/DC  DC/DC  2011-11-22

Linear推出固定频率同步降压型DC/DC控制器LTC3867

Linear  DC/DC  控制器  LTC3867  2011-09-16
在线研讨会
焦点