高的工作電壓高達100V N雙N溝道MOSFET同步驅(qū)動 The D810DCDC is a synchronous step-down switching regulator controller that can directly step-down voltages from up to 100V, making it ideal for telecom and automotive applications. The D810DCDC uses a constant on-time valley current control architecture to deliver very low duty cycles with accurate cycle-by-cycle current limit, without requiring a sense resistor. A precise internal reference provides 0.5% DC accuracy. A high bandwidth (25MHz) error amplifi er provides very fast line and load transient response. Large 1Ω gate drivers allow the D810DCDC to drive multiple MOSFETs for higher current applications. The operating frequency is selected by an external resistor and is compensated for variations in VIN and can also be synchronized to an external clock for switching-noise sensitive applications. Integrated bias control generates gate drive power from the input supply during start-up and when an output shortcircuit occurs, with the addition of a small external SOT23 MOSFET. When in regulation, power is derived from the output for higher effi ciency.
上傳時間： 2013-10-24
上傳用戶：wd450412225
設(shè)計一種以太陽能光伏電池提供驅(qū)動能源、以半導(dǎo)體制冷片作為制冷源的制冷系統(tǒng)。系統(tǒng)在ATMEGA16單片機控制下，能將太陽能光伏電池轉(zhuǎn)換的直流電進行有效存儲并給半導(dǎo)體制冷片供電；設(shè)計硬件電路以及軟件來實現(xiàn)溫度的控制，以滿足制冷的需求。該設(shè)計提供了一種新型、節(jié)能、環(huán)保的制冷方式。
標簽： 太陽能供電 半導(dǎo)體制冷 系統(tǒng)設(shè)計
上傳時間： 2013-11-12
上傳用戶：元宵漢堡包
隨著社會的發(fā)展和人口的增長，人們對能源的需求量越來越大，節(jié)能環(huán)保已經(jīng)成為人類迫切需要解決的問題。太陽能作為一種清潔能源受到越來越多的關(guān)注，而LED具有發(fā)光效率高、壽命長等優(yōu)點。基于Si1000單片機，采用蓄電池充電芯片LT3652和LED驅(qū)動芯片LT3756，將太陽能光伏發(fā)電和LED照明相結(jié)合，應(yīng)用于小型街道路燈照明系統(tǒng)，并結(jié)合傳感技術(shù)及無線通訊技術(shù)，提高了蓄電池的充電效率，實現(xiàn)了光控、聲控、及無線控制功能。
上傳時間： 2013-10-13
上傳用戶：fklinran
在醫(yī)用電阻抗層析成像（Electrical Impedance Tomography）系統(tǒng)中電壓控制電流源的性能十分重要，大部分報道的電壓控電流源電路在低頻時有較高的輸出阻抗但是在高頻時性能大幅減弱。通過分析生物阻抗測量系統(tǒng)對電壓控制電流源的需求，同時回顧一些已有的電壓控制電流源電路，包括雙運放負反饋電路、跨導(dǎo)運算放大器、AD844，設(shè)計了一種基于AD8610的電壓控制電流源。并通過電路實驗驗證了此電壓控制電流源的性能，同時提出了改進方案。該電壓電流源不僅頻率和幅值可控、精度高，而且有較高的輸出阻抗。
標簽： 電阻抗 成像系統(tǒng) 電壓控制 電流源
上傳時間： 2013-11-05
上傳用戶：heart_2007
為了改善風電場發(fā)電的穩(wěn)定性，抑制風電引起的電壓波動與閃變，提高含風電電力系統(tǒng)的穩(wěn)定性問題成為重要的研究內(nèi)容，本文在簡要介紹風電的特點的基礎(chǔ)上，針對風電并網(wǎng)帶來的電能質(zhì)量及穩(wěn)定性等問題，闡述了基于能量調(diào)度技術(shù)的解決方案，詳細介紹了基于模糊理論"最大-最小"算法的調(diào)度系統(tǒng)控制器和系統(tǒng)其它主要部分的模型及仿真結(jié)果。控制器根據(jù)負荷用電量預(yù)測信息控制儲能系統(tǒng)的充放電，不僅能有效抑制并網(wǎng)后電網(wǎng)的電能波動也能優(yōu)化風電的發(fā)電質(zhì)量。MATLAB仿真結(jié)果表明，風電儲能系統(tǒng)能量調(diào)度策略和控制器是有效的，該系統(tǒng)能夠有效減小風電場并網(wǎng)功率的波動。
標簽： 風電 儲能系統(tǒng) 能量 調(diào)度策略
上傳時間： 2013-10-10
上傳用戶：my_cc
The LTC®3569 is a compact power solution for handhelddevices. Its tiny 3mm × 3mm QFN package includesthree buck regulators with individually programmableoutput voltages. One regulator supports load currentsup to 1200mA, while the other two support currents to600mA. Two regulators can be paralleled for increasedload capability. Each current-mode regulator is internallycompensated with excellent load and line regulation. Acomplete 2- or 3-output solution requires a minimumof external passive components.
標簽： Wire 降壓穩(wěn)壓器 動態(tài) 可編程
上傳時間： 2013-10-11
上傳用戶：yxgi5
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.
上傳時間： 2013-10-16
上傳用戶：china97wan
For a variety of reasons, it is desirable to charge batteriesas rapidly as possible. At the same time, overchargingmust be limited to prolong battery life. Such limitation ofovercharging depends on factors such as the choice ofcharge termination technique and the use of multi-rate/multi-stage charging schemes. The majority of batterycharger ICs available today lock the user into one fixedcharging regimen, with at best a limited number ofcustomization options to suit a variety of application needsor battery types. The LTC®1325 addresses these shortcomingsby providing the user with all the functionalblocks needed to implement a simple but highly flexiblebattery charger (see Figure 1) which not only addressesthe issue of charging batteries but also those of batteryconditioning and capacity monitoring.
上傳時間： 2013-10-19
上傳用戶：royzhangsz
為了改變目前電網(wǎng)現(xiàn)場作業(yè)管理的變電巡檢、變電檢修試驗、輸電線路巡檢檢修等管理系統(tǒng)各自獨立運行，信息不能共享，功能、效率受限，建設(shè)和維護成本高的現(xiàn)狀，提出了采用B/S+C/S構(gòu)架模式，將各現(xiàn)場作業(yè)管理模塊和生產(chǎn)MIS（管理系統(tǒng)）集成為一體的現(xiàn)場作業(yè)管理系統(tǒng)的設(shè)計方案，做到各子系統(tǒng)和生產(chǎn)MIS軟硬資源共享，做到同一數(shù)據(jù)唯一入口、一處錄入多處使用。各子系統(tǒng)設(shè)備人員等基礎(chǔ)信息來源于生產(chǎn)管理系統(tǒng)，各子系統(tǒng)又是生產(chǎn)管理系統(tǒng)的作業(yè)數(shù)據(jù)、缺陷信息的重要來源。經(jīng)過研究試用成功和推廣應(yīng)用，目前該系統(tǒng)已在江西電網(wǎng)220 kV及以上變電站全面應(yīng)用。 Abstract: In order to improve the status that the substation field inspection system， substation equipments maintenance and testing system， power-line inspection and maintenance system are running independent with each other. They can?蒺t share the resource information which accordingly constrains their functions and efficiency， and their construction and maintenance costs are high. This paper introduces a field standardized work management system based on B/S+C/S mode， integrating all field work management systems based on MIS and share the equipments and employee?蒺s data of MIS，the field work data of the sub systems are the source information of MIS， by which the same single data resouce with one-time input can be utilized in multiple places. After the research and testing， this system is triumphantly using in all 220kV and above substations in Jiangxi grid.
標簽： 電網(wǎng) 信息化 管理系統(tǒng)
上傳時間： 2013-11-15
上傳用戶：han_zh
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
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