LT8620EMSE#TRPBF
IIMBONAKALO
Uluhlu olubanzi lweVoltage: 3.4V ukuya kwi-65V
Imowudi yangoku yokuQhuba eQuiscent ephantsi:
2.5μA IQ Ukulawula i-12VIN ukuya kwi-3.3VOUT
Imveliso yeRipple < 10mVP-P
Ukusebenza okuPhakamileyo koQhagamshelwano:
94% Ukusebenza kakuhle kwi-1A, i-12VIN ukuya kwi-5VOUT
I-92% Ukusebenza kakuhle kwi-1A, i-12VIN ukuya kwi-3.3VOUT
Ukukhawuleza 30ns Ubuncinci bexesha lokutshintshela
Ukuyeka okuPhantsi phantsi kwayo yonke iMiqathango: 250mV ku-1A
Ukunyamezela ngokuKhuselekileyo i-Inductor Saturation kwi-Overload
I-EMI ephantsi
I-Adjustable kunye ne-Synchronizable: 200kHz ukuya kwi-2.2MHz
Ichanekile i-1V Yenza iPin Threshold
Imbuyekezo yangaphakathi
Imveliso yeSoft-Qala kunye nokuLanda
I-Thermally Ephuculweyo encinci ye-16-Lead MSOP kunye ne-24-Lead 3mm × 5mm iiPakethi zeQFN
IZICELO
IZibonelelo zeemoto kunye nezoShishino
Injongo ngokuBanzi iNyathelo-Phantsi
GSM Power Supplies
INKCAZO
I-LT®8620 yi-compact, i-high-high, i-high speed synchronous monolithic step-down switching regulator eyamkela uluhlu olubanzi lwamandla ombane ukuya kwi-65V, kunye ne-2.5µAofquiescent yangoku.Iiswitshi zamandla e-Topandbottom zibandakanyiwe nazo zonke iisekethe eziyimfuneko zokunciphisa imfuno yamacandelo angaphandle.Ukusebenza kweNdlela yokuQhutywa kweRipple ephantsi kwenza ukusebenza okuphezulu ukuhle ukuya kwimisinga yemveliso ephantsi kakhulu ngelixa ugcina i-ripple yemveliso ingaphantsi kwe-10mVP-P.I-PIN SYNC ivumela ungqamaniso kwiwotshi yangaphandle.Imbuyekezo yangaphakathi enencopho yangoku ye-topology ivumela ukusetyenziswa kwee-inductors ezincinci kunye neziphumo zokuphendula ngokukhawuleza okwethutyana kunye nokuzinza okuhle kwe-loop.Iphini ye-EN/UV inomqobo ochanekileyo we-1V kwaye ingasetyenziselwa kwiprogramVIN i-undervoltage lockout okanye ukuvala i-LT8620 inciphisa igalelo lonikezelo lwangoku ukuya kwi-1µA.I-capacitor kwi-TR / SS pin iprogram isantya se-voltage ye-voltage ephumayo ngexesha lokuqalisa.Imiqondiso yeflegi yePG xa iVOUT ingaphakathi ±9% yombane wemveliso ecwangcisiweyo kunye neemeko zokusilela.I-LT8620 ifumaneka kwi-MSOP encinci ye-16-Lead kunye ne-3mm× 5mmQFNpackages kunye neepads eziveziweyo zokuxhathisa ukushisa okuphantsi.
I-LT8620 yi-monolithic, i-frequency eqhubekayo, imowudi yangoku ye-step-down DC/DC converter.I-oscillator, ene-frequency set usebenzisa isichasi kwi-RT pin, ivula iswitsha yamandla yangaphakathi ephezulu ekuqaleni komjikelo wewotshi nganye.Ikhoyo ngoku kwi-inductor ngoko inyuka de isithelekisi sangoku sihambe kwaye sicime iswitshi yamandla ephezulu.I-peak inductor current apho i-top switch switch ivaliwe ilawulwa yi-voltage kwi-node yangaphakathi ye-VC.I-amplifier yephutha i-servos i-node ye-VC ngokuthelekisa i-voltage kwi-pin ye-VFB kunye ne-reference ye-0.97V yangaphakathi.Xa umthwalo wangoku unyuka ubangela ukuncipha kombane wengxelo ngokunxulumene nereferensi ekhokelela kwiamplifier yempazamo ukunyusa i-voltage ye-VC de umndilili we-inductor wangoku uhambelana nomthwalo omtsha wangoku.Xa isitshixo samandla esingaphezulu sicima, iswitshi yamandla ehambelanayo ivula kude kube ngumjikelo wewotshi elandelayo iqale okanye i-inductor current iwele ku-zero.Ukuba iimeko zomthwalo ogqithisiweyo ziphumela ngaphezu kwe-3.9A egeleza kwi-switch ephantsi, umjikelo wewotshi olandelayo uya kulibaziseka kude kube yilapho utshintsho lwangoku lubuyela kwinqanaba elikhuselekileyo.
Isishwankathelo
I-LT3650 yi-completemonolithic, i-mid-power, itshaja ye-Li-Ionbattery, ejongene nezicelo zombane ophezulu kunye nezisombululo ezisebenzisa ubuncinci bamacandelo angaphandle.I-IC isebenzisa i-1MHz rhoqo-i-frequency, i-avareji yemowudi yangoku ye-step-down architecture.
I-LT3650 idibanisa i-2A switch eqhutywa yi-bootstrappedsupplytomaximizeefficiencyduringcharging cycles.Uluhlu olubanzi lwegalelo luvumela umsebenzi ukuba utshaje ngokupheleleyo ukusuka kwi-9V ukuya kwi-32V.Iphini yokuvala umgubasi ochanekileyo ivumela ukubandakanywa komsebenzi we-UVLO usebenzisa isahluli esilula sokuchasa.I-IC inokuphinda ifakwe kwimowudi yokuvala ephantsi yangoku, apho igalelo lokubonelela ngegalelo lincitshiswe ukuya kwi-15µA kuphela.
I-LT3650 idibanisa amanqanaba amaninzi enkululeko yolawulo lwangoku.Ubuninzi bentlawulo yangoku lusetwa kusetyenziswa i-inductor yangoku yokumelana nengqiqo.Ubuninzi beqhosha lenkqubo langoku livumela ukuguqulwa kwebhetri yangoku.I-LT3650 ikwabandakanya igalelo lenkqubo yonikezelo lwenkqubo yolawulo lomda wolawulo olusebenzayo olusebenzisa intlawulo yebhetri yangoku ukulungiselela iimfuno zomthwalo wenkqubo iyonke.
