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
當(dāng)前,太陽能光伏市場(chǎng)(包括光伏模塊和逆變器)正以每年約30%的年累積速 度增長。太陽能逆變器的作用是將隨太陽能輻射及光照變化的DC 電壓轉(zhuǎn)換成為 電網(wǎng)兼容的AC 輸出;而對(duì)于廣大電子工程師而言,太陽能逆變器是一個(gè)值得高 度關(guān)注的技術(shù)領(lǐng)域。因此下文將介紹太陽能逆變器設(shè)計(jì)所需注意的技術(shù)要點(diǎn)、挑 戰(zhàn)以及相應(yīng)的解決方法。 基本設(shè)計(jì)標(biāo)準(zhǔn) 基于太陽能逆變器的專用性以及保持設(shè)計(jì)的高效率,它需要持續(xù)監(jiān)視太陽能 電池板陣列的電壓和電流,從而了解太陽能電池板陣列的瞬時(shí)輸出功率。它還需 要一個(gè)電流控制的反饋環(huán),用于確保太陽能電池板陣列工作在最大輸出功率點(diǎn), 以應(yīng)付多變的高輸入。目前,太陽能逆變器已有多種拓?fù)浣Y(jié)構(gòu),最常見的是用于 單相的半橋、全橋和Heric(Sunways 專利)逆變器,以及用于三相的六脈沖橋和 中點(diǎn)鉗位(NPC)逆變器;圖1 所示是這些逆變器的拓?fù)鋱D(Microsemi 圖源)。 同時(shí),設(shè)計(jì)還需遵從安全規(guī)范,并在電網(wǎng)發(fā)生故障的時(shí)候可以快速斷開與電網(wǎng)的 連接。因此,太陽能逆變器的基本設(shè)計(jì)標(biāo)準(zhǔn)包括額定電壓、容量、效率、電池能 效、輸出AC 電源質(zhì)量、最大功率點(diǎn)跟蹤(MPPT)效能、通信特性和安全性
標(biāo)簽: 太陽能逆變器
上傳時(shí)間: 2014-12-24
上傳用戶:三人用菜
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
QA03是專為需要兩組隔離電源的IGBT驅(qū)動(dòng)器而設(shè)計(jì)的DC-DC模塊電源。其內(nèi)部采用了兩路獨(dú)立輸出后共接模式,可以更好的為IGBT的開通與關(guān)斷提供能量。同時(shí)具有輸出短路保護(hù)及自恢復(fù)能力。
上傳時(shí)間: 2013-11-21
上傳用戶:極客
•用于對(duì)SIMATICS7-400的供電•用于將AC或DC網(wǎng)絡(luò)電壓轉(zhuǎn)換為所需的5V DC和24VDC工作電壓•輸出電流為4A,10A和20A
上傳時(shí)間: 2014-04-30
上傳用戶:1037540470
QA02是專為需要兩組隔離電源的IGBT驅(qū)動(dòng)器而設(shè)計(jì)的DC-DC模塊電源。其內(nèi)部采用了兩路獨(dú)立輸出后共接模式,可以更好的為IGBT的開通與關(guān)斷提供能量。同時(shí)具有輸出短路保護(hù)及自恢復(fù)能力。
上傳時(shí)間: 2014-01-11
上傳用戶:blans
摘要:介紹并比較了電壓控制型和電流控制型開關(guān)電源的基本原理,提出了一種電壓控制型開關(guān)電源加電流截止負(fù)反饋的方法。由SG3525實(shí)現(xiàn)的開關(guān)電源電路實(shí)例,證明了這種電路的優(yōu)點(diǎn)。關(guān)鍵詞:開關(guān)電源;電壓控制型;電流控制型;PWM
標(biāo)簽: AC DC 開關(guān)電源
上傳時(shí)間: 2014-04-15
上傳用戶:kytqcool
AC通用輸入(100~240V AC)全球?qū)?yīng)型電源1
上傳時(shí)間: 2014-04-15
上傳用戶:u789u789u789
電源待機(jī)能耗規(guī)范術(shù)語解釋: 靜態(tài)待機(jī)模式是指產(chǎn)品被關(guān)閉不執(zhí)行任何常規(guī)功能但仍然與電源連接的空載狀態(tài),此時(shí)僅為低功耗微控制器和喚醒電路供電。比如有喚醒功能的電腦等電子產(chǎn)品,該微功耗電源在靜態(tài)待機(jī)狀態(tài)下功耗小于6mW,比能源之星靜態(tài)待機(jī)功耗2.0和EuP標(biāo)(300mW)還要低50倍,這么低的靜態(tài)待機(jī)功耗世界無與倫比。 動(dòng)態(tài)待機(jī)模式是指產(chǎn)品在開啟并處于執(zhí)行常規(guī)功能時(shí)的狀態(tài),此時(shí)為主IC控制器、接收器和開關(guān)機(jī)驅(qū)動(dòng)電路供電。比如有遙控功能的電視機(jī)等電子產(chǎn)品,該微功耗電源在動(dòng)態(tài)待機(jī)狀態(tài)下功耗小于50mW,比能源之星靜態(tài)待機(jī)功耗2.0和EuP標(biāo)(300mW)還要低6倍,這么低的動(dòng)態(tài)待機(jī)功耗世界無與倫比。
標(biāo)簽: AC-DC 電源轉(zhuǎn)換器
上傳時(shí)間: 2013-11-25
上傳用戶:asasasas
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