2011全國大賽A題開關(guān)電源模塊并聯(lián)供電系統(tǒng)
標(biāo)簽： 2011 大賽 開關(guān)電源模塊 并聯(lián)供電系統(tǒng)
上傳時間： 2013-11-10
上傳用戶：冇尾飛鉈
Avnet Design Service電源實(shí)驗(yàn)室開發(fā)出基于MSP430FE427(A) 模塊的電度表解決方案： （1）電壓 (90Vac~264Vac) 與電流 (10Arms) 測量范圍寬 （2）電度表是一種測量用電量的設(shè)備 （3）LCD顯示電量 (kWh)、功率 (W)、電壓 (V)、電流 (A)、功率因數(shù)(PF) 與溫度 (oC) 測量值 （4）264Vac/63Hz與140mW @90Vac/47Hz條件下，無負(fù)載功耗低于300mW （5）測量精度高達(dá)2%
上傳時間： 2013-10-13
上傳用戶：cjf0304
LM2596開關(guān)電壓調(diào)節(jié)器是降壓型電源管理單片集成電路，能夠輸出3A的驅(qū)動電流，同時具有很好的線性和負(fù)載調(diào)節(jié)特性。固定輸出版本有3.3V、5V、12V， 可調(diào)版本可以輸出小于37V的各種電壓。 該器件內(nèi)部集成頻率補(bǔ)償和固定頻率發(fā)生器，開關(guān)頻率為150KHz，與低頻開關(guān)調(diào)節(jié)器相比較，可以使用更小規(guī)格的濾波元件。由于該器件只需4個外接元件，可以使用通用的標(biāo)準(zhǔn)電感，這更優(yōu)化了LM2596的使用，極大地簡化了開關(guān)電源電路的設(shè)計。 其封裝形式包括標(biāo)準(zhǔn)的5腳TO-220封裝（DIP）和5腳TO-263表貼封裝（SMD）。 該器件還有其他一些特點(diǎn)：在特定的輸入電壓和輸出負(fù)載的條件下，輸出電壓的誤差可以保證在±4%的范圍內(nèi)，振蕩頻率誤差在±15%的范圍內(nèi)；可以用僅80μA的待機(jī)電流， 實(shí)現(xiàn)外部斷電；具有自我保護(hù)電路（一個兩級降頻限流保護(hù)和一個在異常情況下斷電的過溫完全保護(hù)電路） ※ 3.3V、5V、12V的固定電壓輸出和可調(diào)電壓輸出 ※ 可調(diào)輸出電壓范圍1.2V～37V±4% ※ 輸出線性好且負(fù)載可調(diào)節(jié) ※ 輸出電流可高達(dá)3A ※ 輸入電壓可高達(dá)40V ※ 采用150KHz的內(nèi)部振蕩頻率，屬于第二代開關(guān)電壓調(diào)節(jié)器，功耗小、效率高 ※ 低功耗待機(jī)模式，IQ的典型值為80μA ※ TTL斷電能力 ※ 具有過熱保護(hù)和限流保護(hù)功能 ※ 封裝形式：TO-220（T）和TO-263（S） ※ 外圍電路簡單，僅需4個外接元件， 且使用容易購買的標(biāo)準(zhǔn)電感
上傳時間： 2014-12-24
上傳用戶：ttpay
The LTC®3414 offers a compact and efficient voltage regulatorsolution for point of load conversion in electronicsystems that require low output voltages (down to 0.8V)from a 2.5V to 5V power bus. Internal power MOSFETswitches, with only 67mW on-resistance, allow theLTC3414 to deliver up to 4A of output current with efficiencyas high as 94%. The LTC3414 saves space by operatingwith switching frequencies as high as 4MHz, enabling theuse of tiny inductors and capacitors.
標(biāo)簽： 同步穩(wěn)壓器 元件 驅(qū)動 負(fù)載
上傳時間： 2014-01-03
上傳用戶：dongbaobao
Easy-to-use and compact point-of-load power suppliesare necessary in systems with widely distributed, highcurrent, low voltage loads. The LTC®3415 provides acompact, simple and versatile solution. It includes a pairof integrated complementary power MOSFETs (32mΩtop and 25mΩ bottom) and requires no external senseresistor. A complete design requires an inductor andinput/output capacitors, and that’s it. The result is a fast,constant frequency, 7A current mode DC/DC switchingregulator.
標(biāo)簽： 387 DN 級聯(lián) 負(fù)載
上傳時間： 2013-10-18
上傳用戶：avensy
Automotive batteries, industrial power supplies, distributedsupplies and wall transformers are all sources ofwide-ranging high voltage inputs. The easiest way to stepdown these sources is with a high voltage monolithicstep-down regulator that can directly accept a wide inputrange and produce a well-regulated output. The LT®3493accepts inputs from 3.6V to 36V and LT3481 acceptsinputs from 3.6V to 34V. Both provide excellent lineand load regulation and dynamic response. The LT3481offers a high effi ciency solution over a wide load range andkeeps the output ripple low during Burst Mode® operationwhile the LT3493 provides a tiny solution with minimalexternal components. The LT3493 operates at 750kHzand the LT3481 has adjustable frequency from 300kHzto 2.8MHz. High frequency operation enables the use ofsmall, low cost inductors and ceramic capacitors.
標(biāo)簽： 寬 輸入 降壓型穩(wěn)壓器
上傳時間： 2014-12-24
上傳用戶：Pzj
Automotive power systems are unforgiving electronicenvironments. Transients to 90V can occur when thenominal voltage range is 10V to 15V (ISO7637), along withbattery reversal in some cases. It’s fairly straightforwardto build automotive electronics around this system, butincreasingly end users want to operate portable electronics,such as GPS systems or music/video players,and to charge their Li-Ion batteries from the automotivebattery. To do so requires a compact, robust, effi cientand easy-to-design charging system
上傳時間： 2013-11-04
上傳用戶：wfl_yy
Once relegated to the hinterlands of low cost indicatorlights, the LED is again in the spotlight of the lightingworld. LED lighting is now ubiquitous, from car headlightsto USB-powered lava lamps. Car headlights exemplifyapplications that capitalize on the LED’s clear advantages—unwavering high quality light output, tough-assteelrobustness, inherent high effi ciency—while a USBlava lamp exemplifi es applications where only LEDs work.Despite these clear advantages, their requirement forregulated voltage and current make LED driver circuitsmore complex than the venerable light bulb, but some newdevices are closing the gap. For instance, the LTM®8040μModule™ LED driver integrates all the driver circuitryinto a single package, allowing designers to refocus theirtime and effort on the details of lighting design criticalto a product’s success.
上傳時間： 2013-10-16
上傳用戶：togetsomething
The LTC®4155 and LTC4156 are dual multiplexed-inputbattery chargers with PowerPath™ control, featuring I2Cprogrammability and USB On-The-Go for systems suchas tablet PCs and other high power density applications.The LTC4155’s float voltage (VFLOAT) range is optimizedfor Li-Ion batteries, while the LTC4156 is optimized forlithium iron phosphate (LiFePO4)batteries, supportingsystem loads to 4A with up to 3.5A of battery chargecurrent. I2C controls a broad range of functions and USBOn-The-Go functionality is controlled directly from theUSB connector ID pin.
標(biāo)簽： 高電流 便攜式產(chǎn)品 電池充電器 方案
上傳時間： 2013-10-09
上傳用戶：hanhanj
PMC和PMC-A系列是小型，高性能，恒定電壓，恒定電流的串聯(lián)調(diào)節(jié)器方式的DC電源。采用串聯(lián)調(diào)節(jié)器方式的設(shè)計，可以在低噪聲輸出等級的情況下實(shí)現(xiàn)了高穩(wěn)定的輸出。LED數(shù)字儀表在朦朧的環(huán)境中也能清晰易讀，電子開關(guān)排除了繼電器的顫動，也是這一系列的特征。此外，一部分的PMC-A系列裝備了各種遠(yuǎn)程控制功能，通過GPIB，可連接電源控制器。
上傳時間： 2013-10-23
上傳用戶：GHF
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