We provide complete power solutions with a full lineup of power managementproducts. This brochure provides an overview of our high performance DC/DC switching regulatorcontrollers for applications including datacom, telecom, industrial, automotive, medical, avionicsand control systems. We make power design easier with our industry-leading field applicationengineering support; a broad selection of demonstration boards with schematics, layout filesand parts lists; SwitcherCAD® software for simulation, application notes and comprehensivetechnical documentation.
上傳時(shí)間： 2013-10-15
上傳用戶：lz4v4
Advancements in board assembly, PCB layout anddigital IC integration have produced a new generationof densely populated, high performance systems. Theboard-mounted point-of-load (POL) DC/DC power suppliesin these systems are subject to the same demandingsize, high power and performance requirements asother subsystems. The rigorous new POL demands aredifficult to meet with traditional controller or regulatorICs, or power modules.
上傳時(shí)間： 2014-12-24
上傳用戶：lbbyxmraon
Piezoelectric motors are used in digital cameras for autofocus,zooming and optical image stabilization. Theyare relatively small, lightweight and effi cient, but theyalso require a complicated driving scheme. Traditionally,this challenge has been met with the use ofseparatecircuits, including a step-up converter and an oversizedgeneric full-bridge drive IC. The resulting high componentcount and large board space are especially problematicin the design of cameras for ever shrinking cell phones.The LT®3572 solves these problems by combining astep-up regulator and a dual full-bridge driver in a 4mm× 4mm QFN package. Figure 1 shows a typical LT3572Piezo motor drive circuit. A step-up converter is usedto generate 30V from a low voltage power source suchas a Li-Ion battery or any input power source within thepart’s wide input voltage range of 2.7V to 10V. The highoutput voltage of the step-up converter, adjustable upto 40V, is available for the drivers at the VOUT pin. Thedrivers operate in a full-bridge fashion, where the OUTAand OUTB pins are the same polarity as the PWMA andPWMB pins, respectively, and the OUTA and OUTB pinsare inverted from PWMA and PWMB, respectively. Thestep-up converter and both Piezo drivers have their ownshutdown control. Figure 2 shows a typical layout
上傳時(shí)間： 2013-11-18
上傳用戶：hulee
The LTC®4099 high effi ciency USB power manager andLi-Ion/Polymer battery charger seamlessly managespower distribution from multiple sources in portableapplications. It is differentiated from other USB powermanagers by its bidirectional I2C port that allows the hostmicroprocessor to control and monitor all aspects of theUSB power management and battery charging processes.In addition, a programmable interrupt generation functionalerts the host microprocessor to changes in device statusand provides unprecedented control of power managementfunctions. This high degree of confi gurability allowspost-layout changes in operation, even changes in thefi eld, and it allows a single qualifi ed device to be usedin a variety of products, thus reducing design time andeasing inventory management.
上傳時(shí)間： 2013-10-22
上傳用戶：18602424091
保定眾邦公司開(kāi)發(fā)生產(chǎn)的零序電流互感器是用于電力電纜上的一種互感器，它的一次繞組為穿過(guò)互感器內(nèi)孔的三相一次導(dǎo)體電纜（或是單相電纜），它的一次電流是一次三相電流的矢量和（在三相平衡時(shí)為0），當(dāng)發(fā)生系統(tǒng)單相接地時(shí)或三相平衡時(shí)，矢量和不為0，零序電流互感器的二次有電流輸出，可以供給保護(hù)裝置，實(shí)現(xiàn)保護(hù)和監(jiān)控。由于電纜自身絕緣，零序電流互感器外殼也是絕緣的，所以零序電流互感器可以使用在任一電壓等級(jí)的電纜上
標(biāo)簽： 零序電流互感器
上傳時(shí)間： 2014-12-24
上傳用戶：wentian_e
鐘是現(xiàn)代人類日常生活必不可少的工具，語(yǔ)音時(shí)鐘更是現(xiàn)在電子時(shí)鐘多功能化發(fā)展的一個(gè)方向。語(yǔ)音電子鐘具有突出的播報(bào)時(shí)間的功能，它被廣泛用在生活中的各種場(chǎng)合。本設(shè)計(jì)就是從日常生活中常見(jiàn)的事物入手，通過(guò)對(duì)語(yǔ)音電子鐘的設(shè)計(jì)，讓我認(rèn)識(shí)到單片機(jī)已經(jīng)深入到我們生活的每個(gè)領(lǐng)域。 本文從語(yǔ)音電子鐘的設(shè)計(jì)原理、設(shè)計(jì)方案入手，詳細(xì)介紹了系統(tǒng)硬件設(shè)計(jì)、軟件設(shè)計(jì)及調(diào)試。在語(yǔ)音電子鐘的設(shè)計(jì)中，要處理好以下幾個(gè)關(guān)鍵：D/A（數(shù)/模）轉(zhuǎn)換，語(yǔ)音識(shí)別，人機(jī)接口，程序設(shè)計(jì)。D/A（數(shù)/模）和語(yǔ)音識(shí)別技術(shù)關(guān)系到時(shí)間的正確播報(bào)，人機(jī)接口是播報(bào)時(shí)間和調(diào)整時(shí)間的關(guān)鍵。利用凌陽(yáng)SPCE061A單片機(jī)在語(yǔ)音識(shí)別和處理方面的優(yōu)點(diǎn)，結(jié)合實(shí)踐，設(shè)計(jì)出有特色的語(yǔ)音電子鐘。
上傳時(shí)間： 2013-10-30
上傳用戶：feitian920
MFC 六大技術(shù)之簡(jiǎn)化仿真（Console 程序） 第㆓篇【欲善工事先利其器】提供給對(duì) Visual C++ 整合環(huán)境全然陌生的朋友㆒個(gè)導(dǎo)引。 這㆒篇當(dāng)然不能取代 Visual C++ User's Guide 的㆞位，但對(duì)整個(gè)軟件開(kāi)發(fā)環(huán)境有全盤(pán)以 及概觀性的介紹，可以讓初學(xué)者迅速了解手㆖掌握的工具，以及它們的主要功能。 第㆔篇【淺出 MFC 程序設(shè)計(jì)】介紹㆒個(gè) MFC 程序的生死因果。已經(jīng)有 MFC 程序經(jīng) 驗(yàn)的朋友，不見(jiàn)得不會(huì)對(duì)本篇感到驚艷。根據(jù)我的了解，太多㆟使用 MFC 是「只知道 這么做，不知道為什么」；本篇詳細(xì)解釋 MFC 程序之來(lái)龍去脈，為初入 MFC 領(lǐng)域的 讀者奠定扎實(shí)的基礎(chǔ)。說(shuō)不定本篇會(huì)讓你有醍醐灌頂之感。
標(biāo)簽： MFC 簡(jiǎn)體中文
上傳時(shí)間： 2013-12-16
上傳用戶：qq527891923
胰島素泵的設(shè)計(jì) MPLAB IDE是一種在PC 機(jī)上運(yùn)行的軟件，用來(lái)為Microchip Technology系列單片機(jī)開(kāi)發(fā)應(yīng)用程序。由于它提供了一種單一的集成環(huán)境來(lái)為嵌入式單片機(jī)開(kāi)發(fā)程序代碼，因此被稱為集成開(kāi)發(fā)環(huán)境或IDE，所有軟件開(kāi)發(fā)任務(wù)都可以在MPLAB IDE下完成，包括編輯、編譯、調(diào)試程序和下載。MPLAB IDE提供了一個(gè)統(tǒng)一的開(kāi)發(fā)平臺(tái)，用于所有Microchip Technology處理器系統(tǒng)。 本系統(tǒng)的軟件設(shè)計(jì)開(kāi)發(fā)采用C語(yǔ)言。C語(yǔ)言的可移植性很高，并且可讀性很好。軟件設(shè)計(jì)是通過(guò)各個(gè)模塊的編程設(shè)計(jì)來(lái)實(shí)現(xiàn)的。
上傳時(shí)間： 2013-10-08
上傳用戶：哈哈haha
MPLAB C30用戶指南(英文) HIGHLIGHTSThe information covered in this chapter is as follows:• About this Guide• Recommended Reading• Troubleshooting• The Microchip Web Site• Development Systems Customer Notification Service• Customer Support Document LayoutThe document layout is as follows:• Chapter 1: Compiler Overview – describes MPLAB C30, development tools andfeature set.• Chapter 2: Differences between MPLAB C30 and ANSI C – describes thedifferences between the C language supported by MPLAB C30 syntax and thestandard ANSI-89 C.• Chapter 3: Using MPLAB C30 – describes how to use the MPLAB C30 compilerfrom the command line.• Chapter 4: MPLAB C30 Runtime Environment – describes the MPLAB C30runtime model, including information on sections, initialization, memory models, thesoftware stack and much more.• Chapter 5: Data Types – describes MPLAB C30 integer, floating point and pointerdata types.• Chapter 6: Device Support Files – describes the MPLAB C30 header and registerdefinition files, as well as how to use with SFR’s.• Chapter 7: Interrupts – describes how to use interrupts.• Chapter 8: Mixing Assembly Language and C Modules – provides guidelines tousing MPLAB C30 with MPLAB ASM30 assembly language modules.
上傳時(shí)間： 2013-10-21
上傳用戶：13925096126
PICkit™ 2 Microcontroller Programmer USER’S GUIDE This chapter contains general information that will be useful to know before using thePICkit™ 2 Microcontroller Programmer. Items discussed in this chapter include:• Document Layout• Conventions Used in this Guide• Warranty Registration• Recommended Reading• The Microchip Web Site• Development Systems Customer Change Notification Service• Customer Support• Document Revision History
標(biāo)簽： Microcontrolle PICkit 8482
上傳時(shí)間： 2013-11-05
上傳用戶：妄想演繹師
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