The LTM4600 DC/DC μModule regulator is a complete highpower density stepdown regulator for 10A continuous (14Apeak) loads. The device has two voltage options: 20VINmaximum for the LTM4600EV and 28VIN maximum for theLTM4600HVEV each housed in a small 15mm ¥ 15mm ¥2.8mm LGA surface mount package.
上傳時間： 2013-10-10
上傳用戶：adada
The LTM8020, LTM8021, LTM8022 and LTM8023 μModule®regulators are complete easy-to-use encapsulated stepdownDC/DC regulators intended to take the pain and aggravationout of implementing a switching power supplyonto a system board. With a μModule regulator, you onlyneed an input cap, output cap and one or two resistorsto complete the design. As one might imagine, this highlevel of integration greatly simplifi es the task of printedcircuit board design, reducing the effort to four categories:component footprint generation, component placement,routing the nets, and thermal vias.
上傳時間： 2014-01-18
上傳用戶：laomv123
The design of battery-powered equipment can often bequite challenging. Since few ICs can operate directly fromthe end-of-life voltage from a 2-cell battery (about 1.8V),most systems require a DC/DCconverter. The systemdesigner often has a limited area in which to place the DC/DC converter; associated inductors and capacitors must be
上傳時間： 2013-11-23
上傳用戶：wys0120
鎖定放大是微弱信號檢測的重要手段。基于相關(guān)檢測理論，利用開關(guān)電容的開關(guān)實(shí)現(xiàn)鎖定放大器中乘法器的功能，提出開關(guān)電容和積分器相結(jié)合以實(shí)現(xiàn)相關(guān)檢測的方法，并設(shè)計(jì)出一種鎖定放大器。該鎖定放大器將微弱信號轉(zhuǎn)化為與之相關(guān)的方波，通過后續(xù)電路得到正比于被測信號的直流電平，為后續(xù)采集處理提供方便。測量數(shù)據(jù)表明鎖定放大器前級可將10-6 A的電流轉(zhuǎn)換為10-1 V的電壓，后級通過帶通濾波器級聯(lián)可將信號放大1×105倍。該方法在降低噪聲的同時，可對微弱信號進(jìn)行放大，線性度較高、穩(wěn)定性較好。 Abstract: Lock-in Amplifying（LIA）is one of important means for weak signal detection. Based on cross-correlation detection theory， switch in the swithched capacitor was used as multiplier of LIA， and a new method of correlation detection was proposed combining swithched capacitor with integrator. A kind of LIA was designed which can convert the weak signal to square-wave， then DC proportional to measured signal was obtained through follow-up conditioning circuit， providing convenience for signal acquisition and processing. The measured data shows that the electric current（10-6 A） can be changed into voltage（10-1 V） by LIA， and the signal is magnified 1×105 times by cascade band-pass filter. The noise is suppressed and the weak signal is amplified. It has the advantages of good linearity and stability.
標(biāo)簽： 開關(guān)電容 鎖定放大器
上傳時間： 2013-11-29
上傳用戶：黑漆漆
The latest generation of Texas Instruments (TI) boardmountedpower modules utilizes a pin interconnect technologythat improves surface-mount manufacturability.These modules are produced as a double-sided surfacemount(DSSMT) subassembly, yielding a case-less constructionwith subcomponents located on both sides of theprinted circuit board (PCB). Products produced in theDSSMT outline use the latest high-efficiency topologiesand magnetic-component packaging. This providescustomers with a high-efficiency, ready-to-use switchingpower module in a compact, space-saving package. Bothnonisolated point-of-load (POL) switching regulators andthe isolated dc/dc converter modules are being producedin the DSSMT outline.TI’s plug-in power product line offers power modules inboth through-hole and surface-mount packages. The surfacemountmodules produced in the DSSMT outline use asolid copper interconnect with an integral solder ball fortheir
上傳時間： 2013-10-10
上傳用戶：1184599859
XRP7714是一款四輸出脈寬調(diào)制（PWM）分級降壓（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)無需外部分壓器。可編程DPWM開關(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)
上傳時間： 2013-10-31
上傳用戶：chendawei
簡介采用模數(shù)轉(zhuǎn)換器(ADC)的現(xiàn)代電子系統(tǒng)要求更低功耗和更高性能。本文描述了采用線性電源和開關(guān)電源之間的差異，并論證了將高效DC-DC轉(zhuǎn)換器和高性能模數(shù)轉(zhuǎn)換器組合使用，可以顯著降低系統(tǒng)功耗，同時不降低模數(shù)轉(zhuǎn)換器的性能。
標(biāo)簽： 開關(guān)電源 供電 高速模數(shù)轉(zhuǎn)換器
上傳時間： 2013-10-27
上傳用戶：哈哈hah
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。
上傳時間： 2013-10-25
上傳用戶：ljj722
典型性能外型尺寸：70×62×23.5(mm)寬輸入電壓范圍，單、雙、叁路輸出典型效率（5V）80%100KHz開關(guān)頻率PCB板上式安裝
上傳時間： 2014-04-17
上傳用戶：qimingxing130
•經(jīng)過時間顯示窗口大，看起來容易。•采用AC24～240V/DC12～240V的自由電源方式。且DC規(guī)格無需指定極性。•可以通過動作功能切換開關(guān)選擇8個動作功能。•通過時間設(shè)定開關(guān)和時間單位開關(guān)的組合操作，實(shí)現(xiàn)0.1秒～9990小時的多個時間規(guī)格。•裝備各種外部信號輸入功能。可以和各種無接點(diǎn)設(shè)備連接。•通過UL、CSA標(biāo)準(zhǔn)。符合EMC標(biāo)準(zhǔn)(EN61812-1)、對應(yīng)CE標(biāo)記。
上傳時間： 2013-11-12
上傳用戶：781354052
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