The above title is not happenstance and was arrived at afterconsiderable deliberation. As a linear IC manufacturer, it isour goal to encourage users to design and build switchingregulators. A problem is that while everyone agrees thatworking switching regulators are a good thing, everyonealso agrees that they are difficult to get working. Switchingregulators, with their high efficiency and small size, areincreasingly desirable as overall package sizes shrink.Unfortunately, switching regulators are also one of themost difficult linear circuits to design. Mysterious modes,sudden, seemingly inexplicable failures, peculiar regulationcharacteristics and just plain explosions are commonoccurrences. Diodes conduct the wrong way. Things gethot that shouldn’t. Capacitors act like resistors, fusesdon’t blow and transistors do. The output is at ground, andthe ground terminal shows volts of noise.
標(biāo)簽: Regulators Switching Poets for
上傳時(shí)間: 2013-12-19
上傳用戶:奇奇奔奔
Providing power for the Pentium® microprocessor family isnot a trivial task by any means. In an effort to simplify thistask we have developed a new switching regulator controlcircuit and a new linear regulator to address the needs ofthese processors. Considerable time has been spent developingan optimized decoupling network. Here are severalcircuits using the new LTC®1266 synchronous buck regulatorcontrol chip and the LT®1584 linear regulator toprovide power for Pentium processors and Pentium VREprocessors. The Pentium processor has a supply requirementof 3.3V ±5%. The Pentium VRE processor requires3.500V ±100mV.
上傳時(shí)間: 2013-11-01
上傳用戶:名爵少年
Linear Technology has a sabbatical program. Every fiveyears employees are granted sabbatical leave, which maylast up to six weeks. You have 18 months from each fiveyear employment anniversary to take the leave. Sabbaticalis fully company paid and has no restrictions. The time isyours to do with as you please.
標(biāo)簽: 信號調(diào)理電路 電源轉(zhuǎn)換
上傳時(shí)間: 2013-10-19
上傳用戶:851197153
Sensing and/or controlling current flow is a fundamental requirement in many electronics systems, and the tech-niques to do so are as diverse as the applications them-selves. This Application Note compiles solutions to cur-rent sensing problems and organizes the solutions by general application type. These circuits have been culled from a variety of Linear Technology documents
標(biāo)簽: 電流檢測電路
上傳時(shí)間: 2013-10-22
上傳用戶:moshushi0009
LTC3803-5是Linear公司的工作在–55℃ 到150℃的固定頻率恒流模式的反激電源控制器,最適合用來驅(qū)動高輸入電壓的N-MOSFET.工作電壓可低至5V,輸出電壓精度可達(dá)±1.5%,靜態(tài)電流僅為240uA,主要用在42V和12V汽車電源,通信電源,以太網(wǎng)供電(POE),輔助電源等.本文介紹了LTC3803-5主要特性, 方框圖和多種應(yīng)用電路.
標(biāo)簽: 3803 LTC 反激電源 控制技術(shù)
上傳時(shí)間: 2014-04-30
上傳用戶:chongcongying
加利福尼亞州米爾皮塔斯 (MILPITAS, CA) – 2009 年 8 月 31 日 – 凌力爾特公司 (Linear Technology Corporation) 推出隔離式 RS485 微型模塊 (uModule®) 收發(fā)器 LTM2881,該器件針對大的地至地差分電壓和共模瞬變提供了保護(hù)作用。在實(shí)際的 RS485系統(tǒng)中,各節(jié)點(diǎn)之間的地電位差異很大,常常超出可容許范圍,這有可能導(dǎo)致通信中斷或收發(fā)器受損。LTM2881 運(yùn)用內(nèi)部感應(yīng)信號隔離來對邏輯電平接口和線路收發(fā)器實(shí)施隔離,以中斷接地環(huán)路,從而實(shí)現(xiàn)了大得多的共模電壓范圍和 >30kV/μs 的卓越共模抑制性能。一個(gè)低 EMI DC-DC 轉(zhuǎn)換器負(fù)責(zé)向收發(fā)器供電,并提供了一個(gè)用于給任何外部支持元件供電的 5V 隔離電源輸出。憑借 2,500VRMS 的電流隔離、板上輔助電源和一個(gè)完全符合標(biāo)準(zhǔn)的 RS485 發(fā)送器和接收器,LTM2881 不需要使用外部元件,從而確保了一款適合隔離串行數(shù)據(jù)通信的完整、小型μModule 解決方案。
上傳時(shí)間: 2013-10-25
上傳用戶:ljj722
研究領(lǐng)域:電源管理IC、功率IC 涉及廠商:Fairchild、ST、NS、Onsemiconductor、Linear和Maxim等 報(bào)告推薦 2009年,受國際金融危機(jī)和行業(yè)不景氣的雙重沖擊,全球電源管理芯片市場規(guī)模出現(xiàn)超過10%的大幅下滑,中國電源管理芯片市場也首次出現(xiàn)負(fù)增長。雖然整體市場明顯下滑,但分領(lǐng)域來看,汽車電子類電源管理芯片市場依然實(shí)現(xiàn)正增長,而計(jì)算機(jī)、網(wǎng)絡(luò)通信和消費(fèi)電子等領(lǐng)域則由于下游整機(jī)出口下滑的拖累導(dǎo)致相關(guān)領(lǐng)域的電源管理芯片市場出現(xiàn)大幅衰退。整體來看,2009年中國電源管理芯片市場雖然陷入了前所未有的負(fù)增長,但下半年以來市場的明顯復(fù)蘇以及人們對節(jié)能、綠色以及低碳需求的不斷增加,未來電源管理芯片市場依然充滿希望。 為了全面而準(zhǔn)確的反映中國電源管理芯片市場地發(fā)展現(xiàn)狀以及未來趨勢,推出《2009-2010年中國電源管理芯片市場研究年度報(bào)告》,將幫助業(yè)界廠商、投資者和相關(guān)政府機(jī)構(gòu)更準(zhǔn)確地把握中國電源管理芯片市場的發(fā)展規(guī)律。 深入、翔實(shí)的市場研究數(shù)據(jù)。基于對行業(yè)產(chǎn)品的深度研究,提供對產(chǎn)品結(jié)構(gòu)、應(yīng)用結(jié)構(gòu)等多個(gè)角度的市場數(shù)據(jù),明晰市場發(fā)展方向。 全面、深刻的品牌競爭分析。從市場格局、競爭策略、SWOT分析等多個(gè)維度分析企業(yè),評點(diǎn)市場領(lǐng)先要素。 科學(xué)、完整的未來發(fā)展預(yù)測。建立在各重點(diǎn)細(xì)分市場上的建模校驗(yàn),并與相關(guān)產(chǎn)業(yè)環(huán)節(jié)進(jìn)行關(guān)聯(lián)分析,確保給出有價(jià)值的趨勢分析與定量預(yù)測結(jié)果。 本報(bào)告全面總結(jié)了2009年中國電源管理芯片市場的發(fā)展?fàn)顩r,全面分析了其推進(jìn)因素和市場特點(diǎn),并對主要廠商進(jìn)行了客觀綜合的評價(jià),通過大量的調(diào)研訪談和詳實(shí)準(zhǔn)確的數(shù)據(jù)支撐,為客戶提供完整的中國電源管理芯片市場信息,為企業(yè)提供有效的決策參考,報(bào)告主要為客戶提供了以下方面的內(nèi)容。 目前國內(nèi)電源管理芯片市場規(guī)模及特點(diǎn) 按產(chǎn)品細(xì)分的電源管理芯片市場情況 按應(yīng)用領(lǐng)域細(xì)分的電源管理芯片市場情況 主要廠商分析 未來各個(gè)細(xì)分市場的預(yù)測 報(bào)告框架
標(biāo)簽: 2009 2010 電源管理 報(bào)告
上傳時(shí)間: 2013-11-17
上傳用戶:dysyase
利用單片機(jī)具有的智能程序控制的特點(diǎn),設(shè)計(jì)了基于STC89C52單片機(jī)的"二極管特性測試器",可對二極管一般特性進(jìn)行快速測試。通過穩(wěn)定線性電流源給二極管加載恒定電流,然后由高精度模數(shù)轉(zhuǎn)換器測試其壓降,以此為基礎(chǔ)可判斷二極管好壞、檢測二極管極性和測試二極管伏安特性等,避免了用萬用表測試只能測得極性而不知其特性這一缺點(diǎn)。可用于電子設(shè)計(jì)制作過程中對二極管進(jìn)行快速測試,以確定被測二極管是否滿足電路的設(shè)計(jì)要求。 Abstract: By making good use of the intelligent control function of the Micro Controller Unit (MCU), the diode trait tester was designed based on the STC89C52,which could be used to test the trait of a diode rapidly. By loading constant current to diode through the stable linear current source, and measuring the voltage drop of the diode by high-precision analogue-to-digital converter (ADC), it can judge whether the diode is good or not, distinguish the polarity of the diode, and test the trait that the diode, which can avoid the fault of using a multimeter can only measure the polarity but not the trait. This device can be used to test the trait of a diode quickly,and to make sure that whether a diode can be used in the electronic design or not.
上傳時(shí)間: 2013-11-13
上傳用戶:assef
Linear 公司的LTC4310是絕緣的雙向I2C總線通信器件,每個(gè)器件可把I2C邏輯狀態(tài)編碼成信號,通過絕緣層傳輸?shù)搅硪粋€(gè)器件.接收器件解碼,并驅(qū)動I2C總線到適當(dāng)?shù)拇_邏輯狀態(tài).主要用在絕緣的I2C, SMBus和PMBus 接口,絕緣電源,以太網(wǎng)供電和正到負(fù)電源通信.本文介紹了LTC4310主要特性,典型應(yīng)用以及多種應(yīng)用電路框圖.
上傳時(shí)間: 2013-11-02
上傳用戶:trepb001
CAT5110/18/19/23/24/25 linear-taper digitally programmable potentiometers perform the same function as a mechanical potentiometer or a variable resistor. These devices consist of a fixed resistor and a wiper contact with 32-tap points that are digitally controlled through a2-wire up/down serial interface.
上傳時(shí)間: 2013-11-22
上傳用戶:541657925
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