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(shí)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(shí)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(shí)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(jì)，可以在低噪聲輸出等級(jí)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(kāi)關(guān)排除了繼電器的顫動(dòng)，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(guò)GPIB，可連接電源控制器。
上傳時(shí)間： 2013-10-23
上傳用戶：GHF
USB轉(zhuǎn)CAN上位機(jī)軟件
上傳時(shí)間： 2013-10-24
上傳用戶：1214209695
用 MSP430實(shí)現(xiàn)斜率 A／D轉(zhuǎn)換的溫度控制系統(tǒng)
標(biāo)簽： MSP 430 D轉(zhuǎn)換 斜率
上傳時(shí)間： 2013-12-21
上傳用戶：athjac
USB總線轉(zhuǎn)接芯片CH341中文手冊(cè)
上傳時(shí)間： 2014-01-25
上傳用戶：Zero_Zero
1. 支持USB1.1或USB2.0通信； 2. 全面支持WIN98、WINME、WIN2000、WINXP、VISTA、WIN7等操作系統(tǒng)； 3. 采用USB口供電，板內(nèi)帶有500mA自恢復(fù)保險(xiǎn)絲或保險(xiǎn)電阻，保護(hù)電腦主板不被意外燒毀； 4. 在對(duì)芯片編程時(shí)可以使用目標(biāo)系統(tǒng)本身電源，也可以使用編程器從USB口取電供給目標(biāo)板，但應(yīng)保證目標(biāo)標(biāo)電流不大于500mA，以免不能正常編程； 5. 編程完成不影響目標(biāo)板的程序運(yùn)行； 6. 支持STC全系列芯片燒錄； 7. 編程器提供3.3V與5V的電壓輸出接口； 8. 速度比并口編程更快更穩(wěn)定，更方便筆記本電腦用戶使用； 9. 采用進(jìn)口原裝芯片，能進(jìn)行高速穩(wěn)定編程；
標(biāo)簽： USB-TTL STC 新思科電子 單片機(jī)燒錄
上傳時(shí)間： 2013-11-06
上傳用戶：新手無(wú)憂
關(guān)于STM32的USB應(yīng)用方面的知識(shí)
上傳時(shí)間： 2013-11-10
上傳用戶：wojiaohs
USB接口波形發(fā)生器
上傳時(shí)間： 2013-11-20
上傳用戶：jackandlee
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