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微型真空泵

DCDC微型模塊電源產品

Demonstration Circuits

標簽： DCDC 微型模塊電源產品

上傳時間： 2013-11-08

上傳用戶：電子世界
溫差電技術：利用體溫為手機充電的系統設計

　　手機已成為人們生活中不可缺少的通信工具。目前手機都是由可充電的鋰離子電池供電，在野外或無市電的情況下，手機隨時可能沒電，這給使用者帶來許多不便。經研究人體與環境之間總是存在溫差，利用溫差電技術可實現真正意義上的手機永不斷電。溫差電技術是綠色環保的發電技術，是一種新的能源替換方式，可將低品位熱源的熱量有效地轉化為電能，同時減少能量消耗，緩解環境污染問題。因此，微型溫差電器件將有美好的應用前景，手機體溫充電系統對于新能源開發必定具有重要的實際意義。

標簽： 溫差電技術手機充電系統設計

上傳時間： 2013-10-21

上傳用戶：lchjng
開關電源設計指南——基礎篇

　　牽涉到開關電源技術設計或分析成為電子工程師的心頭之痛已是不爭的事實。隨著集成化，微型化成為未來設計主流，電子產品設計安全設計要求的快速提高，設計安全、高效的開關電源相關產品設計成為電源工程師的首要任務，為了幫助工程師解決這方面的難題，電子發燒友網整合設計資源特別推出《開關電源設計指南——基礎篇》電子書（免費在線下載數字版《開關電源設計指南——基礎篇》），本電子書論述了開關電源最常用拓撲的基本原理、磁性元件的設計原則及閉環反饋穩定性和驅動保護、電磁兼容性分析等相關內容。開關電源設計指南——基礎篇旨在解決工程師日常設計難題所需的基礎知識，希望這本電子書和以前推出的電子書一樣可以幫助本土工程師的設計創新。

標簽： 開關電源設計指南

上傳時間： 2013-11-11

上傳用戶：zgz317
DN385 10A高性能點的負載DC/DC微型模塊

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.

標簽： DC 385 10A DN

上傳時間： 2014-12-24

上傳用戶：lbbyxmraon
具有寬輸入范圍的微型單片降壓型穩壓器

Automotive batteries, industrial power supplies, distributedsupplies and wall transformers are all sources ofwide-ranging high voltage inputs. The easiest way to stepdown these sources is with a high voltage monolithicstep-down regulator that can directly accept a wide inputrange and produce a well-regulated output. The LT®3493accepts inputs from 3.6V to 36V and LT3481 acceptsinputs from 3.6V to 34V. Both provide excellent lineand load regulation and dynamic response. The LT3481offers a high effi ciency solution over a wide load range andkeeps the output ripple low during Burst Mode® operationwhile the LT3493 provides a tiny solution with minimalexternal components. The LT3493 operates at 750kHzand the LT3481 has adjustable frequency from 300kHzto 2.8MHz. High frequency operation enables the use ofsmall, low cost inductors and ceramic capacitors.

標簽： 寬輸入降壓型穩壓器

上傳時間： 2014-12-24

上傳用戶：Pzj
DN436微型全橋壓電馬達驅動器

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

標簽： 436 DN 全橋壓電

上傳時間： 2013-11-18

上傳用戶：hulee
DN428微型同步升壓轉換器

Alkaline batteries are convenient because they’re easy tofi nd and relatively inexpensive, making them the powersource of choice for portable instruments and devicesused for outdoor recreation. Their long shelf life alsomakes them an excellent choice for emergency equipmentthat may see infrequent use but must be ready to go on amoment’s notice. It is important that the DC/DC convertersin portable devices operate over the widest possiblebattery voltage range to extend battery run time, and thussave the user from frequent battery replacement.

標簽： 428 DN 同步升壓轉換器

上傳時間： 2014-12-24

上傳用戶：569342831
DN445微型模塊LED驅動器

Once relegated to the hinterlands of low cost indicatorlights, the LED is again in the spotlight of the lightingworld. LED lighting is now ubiquitous, from car headlightsto USB-powered lava lamps. Car headlights exemplifyapplications that capitalize on the LED’s clear advantages—unwavering high quality light output, tough-assteelrobustness, inherent high effi ciency—while a USBlava lamp exemplifi es applications where only LEDs work.Despite these clear advantages, their requirement forregulated voltage and current make LED driver circuitsmore complex than the venerable light bulb, but some newdevices are closing the gap. For instance, the LTM®8040μModule™ LED driver integrates all the driver circuitryinto a single package, allowing designers to refocus theirtime and effort on the details of lighting design criticalto a product’s success.

標簽： 445 LED DN 微型模塊

上傳時間： 2013-10-16

上傳用戶：togetsomething
移動電源產品指南

隨著消費者購買便攜設備數量的增多，他們也被具有各種非標準連接器的諸多電源適配器所束縛。為了解決這一問題，微型USB接口成為電池充電和數據傳輸的標準。MAX14578AE/MAX14578E過壓保護充電檢測器和限流開關大大簡化了微型USB端口的設計，從而使終端用戶操作更加輕松

標簽： 移動電源產品指南

上傳時間： 2013-10-09

上傳用戶：chukeey
LTM4601 DC/DC微型模塊性能

The LTM4601 DC/DC μModule regulator is a completehigh power density stepdown regulator for up to 12Acontinuous (14A peak) loads. The device is housed ina small 15mm ¥ 15mm ¥ 2.8mm LGA surface mountpackage, thus the large power dissipation is a challengein some applications. This thermal application note willprovide guidelines for using the μModule regulator inambient environments with or without air fl ow. Loadcurrent derating curves are provided for several inputvoltages and output voltages versus ambient temperatureand air fl ow.

標簽： 4601 DC LTM 微型模塊

上傳時間： 2013-10-19

上傳用戶：bakdesec