便攜式電子器件(如智能手機(jī)、GPS導(dǎo)航系統(tǒng)和平板電腦)的電源可以來(lái)自低壓太陽(yáng)能電池板、電池或AC/DC電源。電池供電系統(tǒng)通常將電池串聯(lián)疊置以實(shí)現(xiàn)更高的電壓，但由于空間不足，此技術(shù)未必總是可行。開(kāi)關(guān)轉(zhuǎn)換器使用電感的磁場(chǎng)來(lái)交替地存儲(chǔ)電能，并以不同電壓釋放至負(fù)載。因?yàn)閾p耗很低，所以開(kāi)關(guān)轉(zhuǎn)換器是個(gè)不錯(cuò)的高效率選擇。連接至轉(zhuǎn)換器輸出端的電容可減少輸出電壓紋波。升壓轉(zhuǎn)換器提供較高的輸出電壓；而應(yīng)用筆記AN-1125(如何運(yùn)用DC-DC降壓調(diào)節(jié)器)所討論的降壓轉(zhuǎn)換器則提供較低的輸出電壓。內(nèi)置FET作為開(kāi)關(guān)的開(kāi)關(guān)轉(zhuǎn)換器稱(chēng)為開(kāi)關(guān)調(diào)節(jié)器，需要外部FET的開(kāi)關(guān)轉(zhuǎn)換器則稱(chēng)為開(kāi)關(guān)控制器。
標(biāo)簽： DC-DC 如何運(yùn)用 升壓調(diào)節(jié)器
上傳時(shí)間： 2013-11-04
上傳用戶：edisonfather
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
A number of conventional solutions have been available forthe design of a DC/DC converter where the output voltageis within the input voltage range—a common scenarioin Li-Ion battery-powered applications—but none werevery attractive until now. Conventional topologies, suchas SEPIC or boost followed by buck, have numerousdisadvantages, including low effi ciency, complex magnetics,polarity inversion and/or circuit complexity/cost. TheLTC®3785 buck-boost controller yields a simple, effi cient,low parts-count, single-converter solution that is easyto implement, thus avoiding the drawbacks associatedwith traditional solutions.
上傳時(shí)間： 2013-10-21
上傳用戶：ljt101007
Speed and accuracy don’t always go hand-in-handin DC/DC converter systems—that is, until now. TheLTC3811 is a dual output, fi xed frequency current modeDC/DC switching regulator controller designed for one oftoday’s most demanding power supply applications: highcurrent, low voltage processor core supplies.
上傳時(shí)間： 2013-11-21
上傳用戶：aix008
DC-link Automotive: MKP1849 (Customized)電動(dòng)汽車(chē)電驅(qū)直流母線電容（顧客訂制品）MKP1849系列.MKP1849-可集成母線排，大大降低了寄生電感，提高了系統(tǒng)穩(wěn)定性。
標(biāo)簽： DC-LINK 電動(dòng)汽車(chē) 電容
上傳時(shí)間： 2013-10-13
上傳用戶：nanfeicui
AN22 details the theoretical and application aspects of the LT1088 thermal RMS/DC converter. The basic theory behind thermal RMS/DC conversion is discussed and design details of the LT1088 are presented. Circuitry for RMS/DC converters, wideband input buffers and heater protection is shown.
標(biāo)簽： 100 MHz RMS 轉(zhuǎn)換
上傳時(shí)間： 2013-10-16
上傳用戶：china97wan
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.
上傳時(shí)間： 2013-10-19
上傳用戶：bakdesec
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(biāo)簽： Wide-input modules offer dc
上傳時(shí)間： 2014-12-24
上傳用戶：dragonhaixm
XRP7714是一款四輸出脈寬調(diào)制（PWM）分級(jí)降壓（step down）DC-DC控制器，并具有內(nèi)置LDO提供待機(jī)電源。該器件在單個(gè)IC上為電池供電的產(chǎn)品提供了整套的電源管理方案，并且通過(guò)內(nèi)含的I2C串行接口進(jìn)行整體的編程配置。XRP7714器件的每一路輸出電壓的編程范圍是0.9V～5.1V，此范圍內(nèi)無(wú)需外部分壓器。可編程DPWM開(kāi)關(guān)頻率的范圍從300kHz到1.5MHz，使用戶能夠在效率和元件大小之間取得最優(yōu)方案。為了讓用戶能夠在設(shè)計(jì)的多路電源XRP7714系統(tǒng)能夠取得最優(yōu)的方案，下文將詳細(xì)的介紹影響XRP7714系統(tǒng)效率的參數(shù)設(shè)置以及外圍器件的選型。
標(biāo)簽： 7714 XRP 多路電源 參數(shù)
上傳時(shí)間： 2013-10-31
上傳用戶：chendawei
產(chǎn)品說(shuō)明 PS系列超小型隔離AC-DC開(kāi)關(guān)電源模塊已生產(chǎn)銷(xiāo)售了9年，產(chǎn)品一直深受客戶歡迎。該系列產(chǎn)品具有體積小、重量輕、動(dòng)態(tài)輸入電壓范圍寬等優(yōu)點(diǎn)，并且轉(zhuǎn)換效率高，性能可靠，具有輸出短路和過(guò)熱保護(hù)功能，可在板安裝。產(chǎn)品采用電膠木或金屬鋁外殼，樹(shù)脂灌封，出廠前全部經(jīng)過(guò)高溫老化并100%測(cè)試。
標(biāo)簽： AC-DC 隔離 開(kāi)關(guān)電源
上傳時(shí)間： 2013-10-24
上傳用戶：a471778
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