标签: constant-current

最小化LED视频墙的影响，同时最大限度地降低成本NXPconstant-currentLEDcontrollerPCA9922forLEDvideowallsMaximizetheimpactofLEDvideowallswhilecuttingcostsThisconstant-currentLEDdriverextendsadvertisingbudgetsbymaximizingtheimpactofLEDvideowallswhilereducingoverallcost.Itisapin-to-pinandfunctionallyequivalent5-ValternativetotheST2221AandSTP08CDC596.KeyfeaturesTheNXPPCA9922isasingle-chipsolutionforLEDdisplay-}8LEDdriveroutputswithlow-side,constant-currentcontroldrivingthatisoptimizedforLEDvideowalls,videobil……

摘要：分析了五个恒流电路设计的分歧。性能数据进行讨论，和电路设计的一些说明精度、动态阻抗、和法规遵从性范围之间的不同的妥协。Maxim>AppNotes>AmplifierandComparatorCircuitsKeywords:currentsource,currentsink,constant-currentsource,opampAug21,2006APPLICATIONNOTE3869VariationsAmongCurrent-Sink/SourceCircuitswithaSingleOpAmpAbstract:Thedesigndifferencesamongfiveconstant-currentcircuitsareanalyzed.Performancedataarediscussed,andillustratethedifferentcompromisesbetweenprecision,dynamicimpedance,andcompliancerangeforsomeofthecircuitdesigns.Acontrolledconstant-currentsourceorsinkisausefulcircuitblocktouseindesigningelectronicapplicationssuchassensorbias,amplifierbias,andspecialwaveformgeneration.Thesetypesofcircuitsexhibithigh-outputdynamicimpedance,whiledeliveringrelativelylargecurre……

摘要：该电路包括电池充电器（MAX712）处理充电器的电源部分和降压开关稳压器（MAX5089）。通过控制稳压器为电池充电控制器MAX712的行为，生产为7V至16V的输出。从任何能够提供所需的快速充电电流，这种情况必须等于输出电压的总和（二加系列充电电池的数量）乘以1.7V的直流电源。Maxim>AppNotes>BatteryManagementPower-SupplyCircuitsKeywords:switchmodebatterychargers,NiMH/NiCdbatterychargers,stepdownregulators,constant-currentsupplies,dV/dtterminationAug09,2010APPLICATIONNOTE4496NiMH/NiCdSwitchmodeBatteryChargerHasdV/dtChargeTerminationAbstract:Thiscircuitincludesabatterycharger(MAX712)andstep-downswitchingregulator(MAX5089)forhandlingthepowerportionofthecharger.BycontrollingtheregulatortheMAX712actsasabattery-chargecontroller,producingoutputsof7Vto16V.ItoperatesfromanyDCsourcecapableofdeliveringthedesiredfast-chargecurrent,withthiscondition:theoutputvoltagemustequal1.7Vmultipliedbythesumof(twoplusthenumberofbatteriestobechargedinseries).Asimilarv……

摘要：模仿自然的软启动的白炽灯，此电路使用内置LED驱动IC(MAX16832)的热折弯保护。从而避免了否则指示灯由展示的恼人和几乎瞬时启动。Maxim>AppNotes>DisplayDriversLEDLightingKeywords:LEDdrivers,softstart,NTCresistors,constant-currentsources,current-foldbackprotectionAug17,2010APPLICATIONNOTE4481Soft-StartEnhancesLEDDriverBy:FonsJanssen,SeniorMemberoftheTechnicalStaffAbstract:Toemulatethenaturalsoftstartofanincandescentbulb,thiscircuitmakesuseofthethermal-foldbackprotectionbuiltintoanLED-driverIC(MAX16832).IttherebyavoidstheannoyingandalmostinstantaneousstartupotherwiseexhibitedbyLEDs.AsimilarversionofthisarticleappearedintheMarch11,2009issueofPowerManagementDesignline(EETimes).OneofthelessobviousdifferencesbetweenincandescentlightbulbsandLED-basedlightsisthespeedatwhichtheystartup.Ani……