When a system designer specifies a nonisolated dc/dc powermodule, considering the needed input voltage range isequally as important as considering the required performanceattributes and features. Generally, nonisolated moduleshave either a narrow or a wide input voltage range. Narrowinputmodules typically have a nominal input voltage of3.3, 5, or 12 V. For systems that operate from a tightlyregulated input bus—such as those that do not use batterybackup—a narrow-input module is often adequate sincethe input remains fairly stable.Offering greater flexibility, wide-input modules operatewithin a range of 7 to 36 V, which includes the popular12- or 24-V industrial bus. This enables a single module tobe used for generating multiple voltages. These modulesare ideal for industrial controls, HVAC systems, vehicles,medical instrumentation, and other applications that usea loosely regulated distribution bus. In addition, systemspowered by a rectifier/battery charger with lead-acidbattery backup almost always require wide-input modules.System designers who choose power supplies may wantto take a close look at the latest generation of wide-inputdc/dc modules.
標簽: Wide-input modules offer dc
上傳時間: 2014-12-24
上傳用戶:dragonhaixm
Apress - Managing Enterprise Systems With The Windows Script Host Source Code
標簽: Enterprise Managing Systems Windows
上傳時間: 2015-01-15
上傳用戶:181992417
Enterprise javabeans的電子書籍,有些具體的指導
標簽: Enterprise javabeans 電子 書籍
上傳時間: 2015-02-07
上傳用戶:JIUSHICHEN
Enterprise Java For Linux - HOWTO
標簽: Enterprise HOWTO Linux Java
上傳時間: 2013-12-11
上傳用戶:chenlong
Applying Enterprise Java Beans 2nd Edition.
標簽: Enterprise Applying Edition Beans
上傳時間: 2014-01-27
上傳用戶:離殤
The practice of enterprise application development has benefited from the emergence of many new enabling technologies. Multi-tiered object-oriented platforms, such as Java and .NET, have become commonplace.
標簽: application development enterprise benefited
上傳時間: 2015-03-11
上傳用戶:aig85
SUN SCJP經典認證系列:(PDF) Prentice Hall - Sun Certified Enterprise Architect for J2EE Technology Study Guide.zip
標簽: Enterprise Technology Certified Architect
上傳時間: 2015-03-19
上傳用戶:leehom61
前一陣子和朋友一起參與了一個實際的EJB(Enterprise JavaBean) 應用 系統開發,在其中學習到了許多有用的技術和經驗。雖然目前的市面上已經有許 多討論EJB 技術的書籍和文章,但是似乎尚未有以實際案例做為討論內容。鑒 于目前許多公司和系統都開始采用Java 和EJB 的技術,因此筆者在此野人獻 曝,希望以一個簡化的范例來說明在開發EJB 應用系統時會遭遇到的技術問題 以及一些設計上的取舍。當然對于J2EE 有興趣的讀者也可以依據文章討論的內 容跟隨作者一起開發這個范例EJB 系統。
標簽: Enterprise JavaBean EJB 系統開發
上傳時間: 2015-03-25
上傳用戶:lingzhichao
本教程介紹了 Enterprise JavaBean 技術,特別關注于在分布式計算方案中 Enterprise JavaBean 組件的角色、體系結構、擴展 API 以及使用 EJB 技術的基本知識。
標簽: Enterprise JavaBean 教程
上傳時間: 2014-11-15
上傳用戶:ANRAN
本教程介紹了 Enterprise JavaBean 技術,特別關注于在分布式計算方案中 Enterprise JavaBean 組件的角色、體系結構、擴展 API 以及使用 EJB 技術的基本知識。
標簽: Enterprise JavaBean 教程
上傳時間: 2013-12-18
上傳用戶:sqq