标签: charge-pump

InductorlessVoltageConverterBoostsaSingleLithiumCell……

Abstract:Thiscircuitletsyouprogramacurrentlimitwithoutusingmicrocontrollersordataconverters.Itconsistsofacharge-pumpvoltagedoubler(U1),acurrent-senseamplifier(U2),andtwon-channelMOSFETs.Thesense-resistorvaluedeterminesthemaximumcurrentlimit.Maxim>AppNotes>AmplifierandComparatorCircuitsPower-SupplyCircuitsKeywords:charge-pumpvoltagedoublers,current-senseamplifiers,n-channelMOSFETs,inrushcurrentNov05,2010APPLICATIONNOTE4501SimpleCurrentLimiterIsProgrammableAbstract:Thiscircuitletsyouprogramacurrentlimitwithoutusingmicrocontrollersordataconverters.Itconsistsofacharge-pumpvoltagedoubler(U1),acurrent-senseamplifier(U2),andtwon-channelMOSFETs.Thesense-resistorvaluedeterminesthemaximumcurrentlimit.AsimilarversionofthisarticleappearedintheMay18,2009issueofEETimesmagazine.Availableintegratedcircuitscanletyouprogramacurrentlimit,buttheygenerallyinvolvemicrocontrollersordataconve……

摘要：本应用笔记介绍了用于便携式应用的电源管理方案四和电池系统。升降压转换器，线性稳压器，电压转换器，电荷泵和电感器稳压器的优化设计和用途。几个Maxim的电源管理设备特色。Maxim>Designsupport>Appnotes>BatteryManagement>APP671Maxim>Designsupport>Appnotes>Power-SupplyCircuits>APP671Keywords:powerforportableapplications,powerregulator,SEPIC,step-upDC-DCcontroller,step-upregulator,step-downswitchingregulator,low-voltagelogic,low-dropoutDC-DCcontroller,linearregulator,charge-pumpconverter,dropoutvoltage,voltageconverter,GaAsFET,RFpoweramplifier,GSM,TDMFApr07,2011APPLICATIONNOTE671EnergyManagementforSmallPortableSystemsAbstract:Thisapplicationnotedescribespower-managementschemesforportableapplicationswithfour-andthree-cellbatterysystems.Optimaldesignsan……

摘要：这个设计理念显示电压检测器、MAX8211和电荷泵逆变器、MAX680，窗体load-disconnect开关切换。此load-detect开关使用仅8µA，并将暂停从深放电保护可充电电池的电池放电。Maxim>AppNotes>BatteryManagementKeywords:voltagemonitor,voltagedetector,voltageconverter,charge-pumpinverter,voltagetriplerJul09,1998APPLICATIONNOTE968Load-DisconnectSwitchHaltsBatteryDischargetoProtectRechargeableBatteriesAbstract:Thisdesignideashowsavoltagedetector,theMAX8211,andchargepumpinverter,theMAX680,thatformaload-disconnectswitch.Thisload-detectswitchusesonly8Aandhaltsbatterydischargetoprotectrechargeablebatteriesfromdeepdischarge.Deepdischargecandamagearechargeablebattery.TheFigure1circuit,bydisconnectingthebatteryfromitsload,haltsbatterydischargeatapredeterminedlevelofdecliningterminalvoltage.TransistorQ1actsastheswitch.……

摘要：MAX1759升降压电荷泵调节恒流功率白光LED，巧妙地利用了反馈网络。1X/2X模式电荷泵提供高效率，尤其是在两节镍氢和/或碱性的应用。Maxim>AppNotes>DisplayDriversPower-SupplyCircuitsKeywords:LEDs,whiteLEDs,chargepumps,charge-pump,currentregulators,buck,boost,stepup/down,Mar27,2002step-up/down,buck/boost,backlight,twocell,AA,alkaline,NiMHAPPLICATIONNOTE1021Buck/BoostCharge-PumpRegulatorPowersWhiteLEDsfromaWide1.6Vto5.5VInputAbstract:TheMAX1759step-up/step-downcharge-pumpregulatorisusedtopowerwhiteLEDswithconstantcurrentbycleveruseofafeedbacknetwork.The1x/2xmodesofthechargepumpprovideshighefficiency,especiallyintwo-cellNiMHand/orAlkalineapplications.Sincetheirinventionafewyearsago,whitelight-emitting-diodes(LEDs)havebeensteadilygaininginpopularity.Becausetheyofferwhiterlightandlongerlifethanincandescent……

analysis_of_charge-pump_phase-locked_loops_5392IEEETRANSACTIONSONCIRCUITSANDSYSTEMS―I:REGULARPAPERS,VOL.51,NO.9,SEPTEMBER20041665AnalysisofCharge-PumpPhase-LockedLoopsPavanKumarHanumolu,StudentMember,IEEE,MerrickBrownlee,StudentMember,IEEE,KartikeyaMayaram,SeniorMember,IEEE,andUn-KuMoon,SeniorMember,IEEEAbstract―Inthispaper,wepresentanexactanalysisforthirdordercharge-pumpphase-lockedloopsusingstateequations.Boththelarge-signallockacquisitionprocessandthesmall-signallineartrackingbehavioraredescribedusingthisanalysis.Thenonlinearstateequationsarelinearizedforthesmall-signalconditionandthe-domainnoisetransferfunctionsarederived.Acomparisontosomeoftheexistinganalysismethodssuchastheimpulse-invarianttransformationand-domainanalys……