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低溫18650 3500
無磁低溫18650 2200
過針刺低溫18650 2200
低溫磷酸3.2V 20Ah
23年專注鋰電池定制

TIDA-01579高效低波紋輸出電源參考設(shè)計

鉅大LARGE  |  點擊量:1188次  |  2020年02月05日  

TI公司的TIDA-01579是采用TpS6282x系列等的高效低波紋輸出電源參考設(shè)計,采用DCS-Control?拓拓,輸出電流高達3A(TpS62823),26/25mΩ內(nèi)部功率開關(guān),非常低的靜態(tài)電流4μA,典型開關(guān)頻率2.2MHz,可調(diào)輸出電壓從0.6V到4V,1%反饋電壓精度,100%占空比,內(nèi)部有軟起動電路,主要用在手持/電池供電設(shè)備的pOL電源,工廠和建筑物自動化,移動計算和網(wǎng)絡(luò)卡,固態(tài)驅(qū)動,數(shù)據(jù)終端和pOL.本文介紹了參考設(shè)計TIDA-01579主要特性和指標,框圖,電路圖,材料清單和pCB設(shè)計圖。


TheTpS6282xisanall-purposeandeasytousesynchronousstep-downDC-DCconverterwithaverylowquiescentcurrentofonly4μA.Itsuppliesupto3Aoutputcurrent(TpS62823)froma2.4Vto5.5Vinputvoltage.BasedontheDCS-Control?topologyitprovidesafasttransientresponse.


Theinternalreferenceallowstoregulatetheoutputvoltagedownto0.6Vwithahighfeedbackvoltageaccuracyof1%overthejuncTIontemperaturerangeof-40℃to125℃。The1,2,3Ascalablepin-to-pinandBOM-to-BOMcompaTIbledevicefamilycanbeusedwithsmall470nHinductors.


TheTpS6282xincludeanautomaticallyenteredpowersavemodetomaintainhighefficiencydowntoverylightloads.


ThedevicefeaturesapowerGoodsignalandaninternalsoftstartcircuit.Itisabletooperatein100%mode.Forfaultprotection,itincorporatesaHICCUpcurrentlimitaswellasathermalshutdown.


TheTpS6282xarepackagedina2x1.5mmQFN-8package.


參考設(shè)計TIDA-01579主要特性:


?DCS-Control?topology


?26/25mΩInternalpowerSwitches(TpS62823)


?Upto3AOutputCurrent(TpS62823)


?VeryLowQuiescentCurrentof4μA


?SwitchingFrequencyoftypically2.2MHz


?1%FeedbackVoltageAccuracy(fulltemp.range)


?Enable(EN)andpowerGood(pG)


?AdjustableOutputVoltagefrom0.6Vto4V


?100%Duty-CycleMode


?InternalSoft-StartCircuitry


?SeamlesspowerSaveModeTransition


?UndervoltageLockout


?ActiveOutputDischarge


?Cycle-by-CycleCurrentLimit


?HICCUpShort-Circuitprotection


?OverTemperatureprotection


?CreateaCustomDesignusingtheTpS62822withtheWEBENCH?powerDesigner


參考設(shè)計TIDA-01579應(yīng)用:


?pOLsupplyinportable/BatterypoweredDevices


?FactoryandBuildingAutomation


?MobileComputing,NetworkingCards


?SolidStateDrive


?DataTerminal,pointofSale


?Servers,projectors,printers




圖1.參考設(shè)計TIDA-01579框圖




圖2.TpS62822應(yīng)用電路:2.4V-5.5V2A電源


Thepoint-of-loadpower-treeonvideosurveillancesystemsisoptimizedwiththisreferencedesign.Thisreferencedesignhasahighperformanceonkeyparameterssuchasoutputvoltageaccuracy,voltageripple,andthermaldissipation.ThishighperformanceispossiblewithasmallboardareaandlowBOMcost.


Thedesignoperatesfroma5-Vsupplycommonlyfoundinvideodoorbells,Ipnetworkcameras,andwirelesscameras.


Videodoorbellsprovideasetoffeaturescommontomanytraditionalvideosurveillancedevices.Thisdistinguishingfeaturedemandsauniquepowerdesigntoensuretrouble-freeoperationfromtheubiquitous,butwidely-varying,ACdoorbellsupply.TofullyutilizeanACsourcethatpresentsasubstantialbottleneck,thepowerdesignshouldbeasefficientaspossible.ThisdesignusesTI’snewsynchronousbuckconvertersandLDOsprovidingacompleteandcustomizablesupplyoptimizedforvideodoorbells.


OurnewestconvertersinQFNandSOT-563packagesallowforasupplydesignthatrequiresminimalboardspaceandhasalowthermalimpact—bothofwhichareneededforsmallerformfactorelectronics.Forbettercompatibility,sequencingispossibleforallrails.


Ipnetworkcamerashaveincreasingimageresolution,processing,andilluminationrequirementswhilestillfittinginsmallenclosures.Aftersteppingdownfromamid-tohigh-voltageDCpowersourcesuchaspluginpowerorpoE,thesystemdemandspoint-of-loadconversionwithhighefficiencyandasmallfootprint.


Bothefficiencyandfootprintareimportanttoaccommodatesmallenclosureswith,typically,less-thanadequateventilation.Thisdesignisoptimizedforbothefficiencyandfootprintwhilealsoprovidingtheflexibilitytotailortomoreadvanced,power-demandingloads,suchasadedicatedimagerecognitionprocessoror4Kvideoprocessor.


Wirelessorbattery-poweredcamerasrequirehighefficiencyatbothfullloadsandlightloads.Thesecamerastypicallyemploymotiondetection,humaninterface,orwirelesscommunicationsmonitoring,oranycombinationofthethree,tominimizetimespentinpower-hungrystatesquiescentcurrentsandshutdowncurrentsofsubsystemsareveryimportantasthesestandbycurrentscanhavesignificantimpactonoverallbatterylife.TheTIDA-01579referencedesignhasbeenoptimizedforthisapplicationbyutilizingTI’slow-powerconvertersfeaturingbothlightloadefficiencyandshutdownwithlowIq.Convertershutdownandlow-Iqloadswitchescanbeusedtocutpowertosubsystemswithless-than-desirablestandbyconsumption—savingcostandextendingbatterylife.


參考設(shè)計TIDA-01579主要特性:


?1%Typicaloutputvoltageaccuracy


?Highsystemefficiencyto90%atfullload


?Voltageripple《60-μV,usefulfornoise-criticalperipherals


?Thermalhotspotis《45℃atfullloadcurrent


?SmallpCBrealestate


?LowBOMcost


參考設(shè)計TIDA-01579應(yīng)用:


?VideoDoorbell


?IpNetworkCamera


?Wirelesscamera


?ThermalImagingCamera


?AnalogSecurityCamera




圖3.參考設(shè)計TIDA-01579外形圖


參考設(shè)計TIDA-01579系統(tǒng)主要指標:






圖4.參考設(shè)計TIDA-01579框圖




圖5.參考設(shè)計TIDA-01579電路圖(1)




圖6.參考設(shè)計TIDA-01579電路圖(2)




圖7.參考設(shè)計TIDA-01579電路圖(3)


參考設(shè)計TIDA-01579材料清單:







圖8.參考設(shè)計TIDA-01579pCB設(shè)計圖(1)



圖9.參考設(shè)計TIDA-01579pCB設(shè)計圖(2)



圖10.參考設(shè)計TIDA-01579pCB設(shè)計圖(3)



圖11.參考設(shè)計TIDA-01579pCB設(shè)計圖(4)



圖12.參考設(shè)計TIDA-01579pCB設(shè)計圖(5)



圖13.參考設(shè)計TIDA-01579pCB設(shè)計圖(6)




圖14.參考設(shè)計TIDA-01579pCB設(shè)計圖(7)




圖15.參考設(shè)計TIDA-01579pCB設(shè)計圖(8)



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