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電源設(shè)計(jì)應(yīng)用
使用TPS65552A驅(qū)動(dòng)便攜式相機(jī)閃光燈
在光線(xiàn)較弱的條件下，膠卷或數(shù)碼攝影的高端設(shè)備需要氙氣閃光燈管來(lái)進(jìn)行拍攝。氙氣閃光燈管可提供瞬間的高強(qiáng)度光源，在對(duì)較遠(yuǎn)處、高速移動(dòng)或弱光條件下的物...
EconOscillator Comparison
Abstract: Dallas Semiconductor manufactures several EconOscillators™ (DS1065, DS1077/DS1077L, DS1085/DS1085L, and DS1086). Since many of the features of these devices cannot easily be categorized into fields in the on-line parametric...
2009-04-22 標(biāo)簽：EconOscill 1049
HFTA-07.0：精密參考時(shí)鐘使用的時(shí)鐘和數(shù)據(jù)恢復(fù)電路-H
Applications for clock data recovery (CDR) abound in telecommunications, optical transceivers, data and storage area networks, and wireless products. The benefits of CDR technology are increasingly important as designs require much greater...
2009-04-22 標(biāo)簽：數(shù)據(jù)時(shí)鐘 1371
DS1086L頻率計(jì)算器-Frequency Calcula
Abstract: The DS1086L is a Spread-Spectrum EconOscillator™ that generates a spread-spectrum, square-wave output between 130kHz and 66.6MHz. This application note describes an easy-to-use frequency calculator for setting the desired o...
2009-04-22 標(biāo)簽： 1291
高精度時(shí)鐘發(fā)生器MAX945x的元件選擇和性能測(cè)試
摘要：MAX9450/MAX9451/MAX9452是集成了VCXO，具有相同PLL內(nèi)核和三種不同輸出(LVPECL， HSTL，LVDS)的高精度時(shí)鐘發(fā)生器。MAX945x時(shí)鐘發(fā)生器具有四個(gè)主要的特點(diǎn)：集成VCXO，工作頻率范圍寬，PLL...
DS32X35帶有鐵電隨機(jī)存取存儲(chǔ)器的高精度實(shí)時(shí)時(shí)鐘(RTC
摘要：該應(yīng)用筆記介紹了DS32X35系列產(chǎn)品。這些器件為帶有鐵電隨機(jī)存取存儲(chǔ)器(RTC + FRAM)的高精度實(shí)時(shí)時(shí)鐘，無(wú)需外接電池即可保持存儲(chǔ)器內(nèi)容。 概述隨著DS32X35...
2009-04-22 標(biāo)簽：存儲(chǔ)器 685
使用容振蕩器作為擴(kuò)頻時(shí)鐘發(fā)生器-Using a Margin
Abstract: This application note describes how to use a margining oscillator for applications that require spread-spectrum clock generation (SSCG). The DS4M133 margining oscillator serves as the example of the technique. ...
2009-04-22 標(biāo)簽：振蕩器 561
超低抖動(dòng)時(shí)鐘合成器的設(shè)計(jì)挑戰(zhàn)
摘要：該應(yīng)用筆記提出了超低抖動(dòng)時(shí)鐘合成器的一種設(shè)計(jì)思路，其目標(biāo)是產(chǎn)生2GHz時(shí)鐘時(shí)，邊沿之間的抖動(dòng)< 100fs。分析和仿真結(jié)果表明，要達(dá)到這一抖動(dòng)指標(biāo)，設(shè)計(jì)難度遠(yuǎn)遠(yuǎn)高于預(yù)...
2009-04-22 標(biāo)簽： 410
Tech Brief 10: ESD Considerati
Abstract: Technical brief suggests ESD protection schemes for RS-232 transceivers. Basic diode clamps, TransZorb™, and zener diodes are considered. Internal latch-up is explained. Protection of vulnerable CMOS devic...
2009-04-22 標(biāo)簽：ESD 2816
電表應(yīng)用中RS-485收發(fā)器的設(shè)計(jì)考慮
摘要：自動(dòng)抄表技術(shù)為電表提供一個(gè)通信端口，以電子方式遠(yuǎn)程讀取數(shù)值。本應(yīng)用筆記討論Maxim RS-485收發(fā)器的不同特性，這些特性使RS-485收發(fā)器非常適合用于電表通信端口。 ...
2009-04-22 標(biāo)簽：收發(fā)器 1158
影響開(kāi)關(guān)模式、DC-DC轉(zhuǎn)換器效率的主要因
影響開(kāi)關(guān)模式、DC-DC轉(zhuǎn)換器效率的主要因 本文詳細(xì)介紹了開(kāi)關(guān)電源(SMPS)中各個(gè)元器件損耗的計(jì)算和預(yù)測(cè)技術(shù)，并討論了提高開(kāi)關(guān)調(diào)節(jié)器效率的相關(guān)技術(shù)和特點(diǎn)。 ...
2009-04-21 標(biāo)簽： 1591
多媒體處理器動(dòng)態(tài)電源管理技術(shù)
多媒體處理器動(dòng)態(tài)電源管理技術(shù) 多媒體處理器通常是便攜式電子設(shè)備中功耗最高的器件。降低 CPU 功耗要求的常見(jiàn)方法是降低時(shí)鐘頻率或工作電壓，但是一般...
2009-04-21 標(biāo)簽：處理器多媒體動(dòng)態(tài) 742
估算涓流充電實(shí)時(shí)時(shí)鐘的超級(jí)電容備份時(shí)間
摘要：Maxim實(shí)時(shí)時(shí)鐘(RTC)系列產(chǎn)品包含了幾款帶涓流充電器的器件，涓流充電器可以為第二個(gè)備份電池或電容充電。電池或電容用來(lái)在VCC掉電時(shí)維持時(shí)鐘工作。儲(chǔ)存在電容內(nèi)的能量需...
2009-04-21 標(biāo)簽：電容 1587
投幣鋰電池：壽命預(yù)測(cè)中的應(yīng)用-Lithium Coin-Ce
Abstract: This application note discusses various contributors to battery capacity consumption in a battery-backed application, and how to predict battery lifetime in a system. A designer should be able to use this application note to dete...
2009-04-21 標(biāo)簽：鋰電池 762
Problems and Solutions for Adj
Abstract: Recent U.S. legislation increased the daylight saving time (DST) period by four weeks. This change will affect systems that adjust for DST by using real-time clocks (RTCs) with an integrated DST adjustment. This note discusses is...
2009-04-21 標(biāo)簽：Daylight 1183
DS1375 Power Line to 60Hz Cloc
Abstract: The DS1375 2-wire digital real-time clock (RTC) is a low-power, clock/calendar that can operate from a digital clock input at one of four frequencies: 32.768kHz, 8.192kHz, 60Hz, or 50Hz. This application note shows how to derive ...
2009-04-21 標(biāo)簽：DS1375 1336
充電電池和單機(jī)快速充電器概述
摘要：本應(yīng)用筆記簡(jiǎn)單介紹了鎳鎘(NiCd)、鎳氫(NiMH)和鋰離子(Li-Ion，Li+)可充電電池, 討論它們的性能，并說(shuō)明在不需要微控制器的情況下如何構(gòu)建單機(jī)結(jié)構(gòu)，安全、快速地為鎳氫和鋰...
5W白光LED燈電路設(shè)計(jì)
5W白光LED燈電路設(shè)計(jì) 利用LED替代MR16鹵素?zé)裟軌蛴行Ы档湍芎?，?jié)省電路及系統(tǒng)維護(hù)的成本。本應(yīng)用筆記詳細(xì)說(shuō)明了在當(dāng)前的MR16...
2009-04-21 標(biāo)簽：led 4489
下一代視頻濾波放大器，延長(zhǎng)了手持式視頻系統(tǒng)的電池使用時(shí)間
要：越來(lái)越多的便攜式設(shè)備，例如數(shù)碼相機(jī)、蜂窩電話(huà)和便攜式媒體播放器等，都開(kāi)始逐漸增加復(fù)合視頻輸出的連接功能。這類(lèi)設(shè)備中，視頻數(shù)/模轉(zhuǎn)換器(DAC)產(chǎn)生復(fù)合視頻信號(hào)，在...
2009-04-21 標(biāo)簽：視頻 503
負(fù)電荷泵為WLED背光應(yīng)用提供堪比電感電路的高效率
摘要：設(shè)計(jì)人員通常采用電荷泵或基于電感的boost電路提供白光LED (WLED)的正向?qū)ㄆ秒妷?。電荷泵價(jià)格較低且使用方便，但截至目前，這種架構(gòu)所能提供的效率低于基于電感的boost...
2009-04-21 標(biāo)簽：WLED 997
Keep Power Consumption in Chec
Abstract: Portable electronic devices usually include a single 3- or 4-connector jack which can be a stereo headphone jack, a mono headphone jack with microphone input and hook switch, or a stereo headphone jack with microphone/hook-switch...
2009-04-21 標(biāo)簽：Power 1243
選擇高亮度LED驅(qū)動(dòng)器用于汽車(chē)照明應(yīng)用
Abstract: This application note provides an overview of HB LED driver selection criteria for automotive lighting applications. It reviews HB LED driver topologies and recommends configurations for various automotive lighting applications, ...
2009-04-21 標(biāo)簽：led驅(qū)動(dòng)器 569
ResourceSmart™ (Green) I
Abstract: As consumers demand environmentally friendly ("green," or ResourceSmart) electronics, design engineers must seek new design techniques, standards, and products. This application note lists links to a variety of government, indust...
2009-04-21 標(biāo)簽： 523
Designing a 4-20mA Current Loo
Abstract: Current-mode data transmission is the preferred technique in many environments, particularly in industrial applications. This application note describes the design of a 4-20mA current loop using the MAX1459 sensor signal conditio...
2009-04-20 標(biāo)簽：Designing 3277
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