LM46001AQPWPRQ1 HTSSOP Amacandelo amatsha kunye neyokuQhosha aVavanyiweyo eDityanisiweyo yeSekethe ye-IC Chips Electronics
Iimpawu zeMveliso
| UHLOBO | INKCAZO |
| Udidi | IiSekethe eziDityanisiweyo (ICs) I-PMIC - i-Voltage Regulators - i-DC DC Switching Regulators |
| Mfr | Texas Instruments |
| Uthotho | Iimoto, AEC-Q100, SIMPLE SWITCHER® |
| Iphakheji | Iteyiphu & neReel (TR) Sika iTape (CT) Digi-Reel® |
| SPQ | 250T&R |
| Ubume beMveliso | Iyasebenza |
| Umsebenzi | Yehla |
| Uqwalaselo Lwemveliso | Okuhle |
| I-Topology | Buck |
| Uhlobo Lwemveliso | Iyahlengahlengiswa |
| Inani leZiphumo | 1 |
| I-Voltage-Igalelo (uMzu) | 3.5V |
| I-Voltage-Input (Ubukhulu) | 60V |
| Voltage-Imveliso (Min/Fixed) | 1V |
| Voltage-Imveliso (Ubukhulu) | 28V |
| Okwangoku -Isiphumo | 1A |
| Ukuphindaphinda-Ukutshintsha | 200kHz ~ 2.2MHz |
| Ungqamaniso loLungisanisi | Ewe |
| Ubushushu bokusebenza | -40°C ~ 125°C (TJ) |
| Uhlobo lokuNqamisa | INtaba engaphezulu |
| Ipakethe / Ityala | I-16-TSSOP (0.173", 4.40mm Ububanzi) I-Pad eveziweyo |
| Supplier Device Package | 16-HTSSOP |
| Inombolo yeMveliso esisiseko | LM46001 |
Iingenelo
Ukuthelekiswa kweenzuzo zokutshintsha okudibeneyo kunye nokutshintsha kwangaphandle kubaguquli beebhaki
1. Ukutshintsha kwangaphandle ngokuchasene nokudibanisa.
Kukho iiswitshi ezininzi ezidibeneyo kunye nokutshintsha kwangaphandle kwizisombululo zokuguqula i-buck, le yokugqibela idla ngokubizwa ngokuba yi-step-down or buck controllers.Ezi ntlobo zimbini zokutshintsha zineengenelo ezahlukeneyo kunye nezingeloncedo kwaye ke ngoko ukhetho phakathi kwazo kufuneka lwenziwe kucatshangelwa iingenelo kunye nokungalunganga kwazo engqondweni.
Iinguqu ezininzi ezidibeneyo zinenzuzo yokuba nenani eliphantsi lecandelo, inzuzo evumela ukuba ezi zitshintshi zibe nobukhulu obuncinci kwaye zisetyenziswe kwizicelo ezininzi ezisezantsi.Ngenxa yobume babo obudibeneyo, bonke babonisa ukusebenza kakuhle kwe-EMI ngelixa bekhuselwe kumaqondo okushisa aphezulu okanye ezinye iimpembelelo zangaphandle ezinokuthi zenzeke.Nangona kunjalo, banakho ukungonakali kwemida yangoku kunye ne-thermal;ngelixa iiswitshi zangaphandle zibonelela ngokuguquguquka okukhulu, kunye nesakhono sangoku sokuphatha esilinganiselwe kuphela kukhetho lwee-FET zangaphandle.Kwicala elibi, utshintsho lwangaphandle lufuna amacandelo amaninzi kwaye kufuneka lukhuselwe kwiingxaki ezinokubakho.
Ukusingatha imisinga ephezulu, iiswitshi nazo kufuneka zibe zikhulu, okwenza ukudibanisa kubize kakhulu njengoko kuthatha indawo ebaluleke kakhulu kwi-chip kwaye ifuna iphakheji enkulu.Ukusetyenziswa kwamandla nakho kungumngeni.Ngoko ke, sinokugqiba ukuba kwimijelo ephezulu yokuphuma (ngokuqhelekileyo ngaphezu kwe-5A), utshintsho lwangaphandle lukhetho olukhethiweyo.
2. I-synchronous ngokuchasene nokulungiswa kwe-asynchronous
Isiguquli sebhaki sokulungisa esingahambelaniyo okanye esingahambelaniyo esineswitshi enye kuphela sifuna idiode eqhubekayo kwindlela esezantsi, ngelixa isiguquli sebhaki esihlaziyiweyo esinezitshixo ezimbini iswitshi yesibini ingena endaweni yale diode yokuqhubekeka ekhankanywe ngasentla.Xa kuthelekiswa nezisombululo ze-synchronous, i-rectifiers ye-asynchronous inenzuzo yokubonelela ngesisombululo esincinci, kodwa ukusebenza kwabo akuphezulu kakhulu.
Ukusebenzisa i-topology yokuhlaziya i-synchronous kunye nokudibanisa i-diode ye-Schottky yangaphandle ngokuhambelana nokutshintsha okuphantsi kuya kunika ukusebenza okuphezulu.Ubunzima obuphezulu bolu tshintsho lwezinga eliphantsi kwandisa ukusebenza kakuhle ngenxa yobukho be-voltage ephantsi kwi-"on" state xa kuthelekiswa ne-Schottky diode.Ngexesha lendawo yokuthengisela (xa zicinyiwe zombini izitshixo), i-diode ye-Schottky yangaphandle inentsebenzo esezantsi yokuyeka xa kuthelekiswa ne-internal back gate diode ye-FET.
3. Yangaphandle vs. imbuyekezo yangaphakathi
Ngokubanzi, abalawuli bebhake kunye nokutshintsha kwangaphandle banokubonelela ngembuyekezo yangaphandle njengoko befanelekile kuluhlu olubanzi lwezicelo.Imbuyekezo yangaphandle inceda ukulungelelanisa i-loop yolawulo kumacandelo ahlukeneyo angaphandle afana neeFET, ii-inductors, kunye nee-output capacitors.
Kubaguquli abaneenguqu ezidibeneyo, zombini imbuyekezo yangaphandle nangaphakathi isetyenziswa ngokuqhelekileyo.Imbuyekezo yangaphakathi yenza imijikelo yokuqinisekisa inkqubo ekhawulezayo kunye neesayizi ezincinci zesisombululo sePCB.
Iinzuzo zembuyekezo yangaphakathi zingashwankathelwa njengento elula yokusetyenziswa (njengoko kuphela isihluzo semveliso kufuneka siqwalaselwe), uyilo olukhawulezayo, kunye nenani elincinci lamacandelo, ngaloo ndlela libonelela ngesisombululo esincinci kwizicelo eziphantsi zangoku.Izinto ezingeloncedo kukuba azibhetyebhetye kwaye isihluzo semveliso kufuneka sithotywe kwimbuyekezo yangaphakathi.Imbuyekezo yangaphandle inikezela ukuguquguquka okukhulu kwaye inokulungelelaniswa ngokwefayile ekhethiweyo yemveliso, ngelixa imbuyekezo ingaba sisisombululo esincinci kwimisinga emikhulu, kodwa esi sicelo sinzima kakhulu.
4. Ulawulo lwemowudi yangoku ngokuchasene nolawulo lwemowudi yombane
Umlawuli ngokwawo unokulawulwa nokuba yimowudi yombane okanye imo yangoku.Kulawulo lwemowudi yombane, amandla ombane ophumayo abonelela ngengxelo ephambili kwiluphu yolawulo, kwaye imbuyekezo ye-feedforward idla ngokuphunyezwa ngokusebenzisa i-voltage yegalelo njengelophu yolawulo lwesibini ukomeleza indlela yokuphendula okwethutyana;kulawulo lwemowudi yangoku, yangoku ibonelela ngengxelo ephambili kwiluphu yolawulo.Ngokuxhomekeke kwi-loop yolawulo, le yangoku inokuba yigalelo langoku, i-inductor yangoku, okanye imveliso yangoku.I-loop yolawulo lwesibini yi-voltage ephumayo.
Ulawulo lwemowudi yangoku lunenzuzo yokubonelela ngempendulo ekhawulezayo ye-loop yempendulo, kodwa ifuna imbuyekezo ye-slope, ukutshintsha ukuhluza ingxolo yokulinganisa ngoku, kunye nokulahlekelwa kwamandla kwi-loop yangoku yokubona.Ulawulo lwemowudi yombane ayifuni imbuyekezo yethambeka kwaye ibonelela ngempendulo ekhawulezayo yelophu kunye nembuyekezo ye-feedforward, nangona impendulo yethutyana iyacetyiswa apha ukuphucula ukusebenza, isekethe yokukhulisa impazamo inokufuna i-bandwidth ephezulu.
Zombini iitoplogi zolawulo lwangoku kunye nemowudi yombane zilungele ukulungiswa ukuze zisetyenziswe kwizicelo ezininzi.Kwiimeko ezininzi, iitoplogi zolawulo lwemowudi yangoku zifuna i-resistor eyongezelelweyo yokubona loop yangoku;i-voltage-mode topology ene-feed-forward imbuyekezo edibeneyo ifikelela phantse ifanayo impendulo yeluphu impendulo kwaye ayifuni isixhasi sangoku sokubona loop.Ukongeza, imbuyekezo eya phambili yenza lula uyilo lwembuyekezo.Uphuhliso oluninzi lwenqanaba elinye luye lwaphunyezwa kusetyenziswa i-voltage mode control topology.
5. IiSwitshi, iiMOSFET kunye neeMOSFET
Utshintshiselwano olusetyenziswayo namhlanje luphuculwe ii-MOSFETs kwaye zininzi iziguquli zokutsiba-ezantsi/ezantsi kunye nabalawuli abasebenzisa ii-MOSFETs kunye nabaqhubi be-PMOSFET.Ii-MOSFET zihlala zibonelela ngentsebenzo eneendleko eziphezulu kunee-MOSFET kwaye ukujikeleza komqhubi kwesi sixhobo kunzima ngakumbi.Ukuvula nokucima i-NMOSFET, amandla ombane aphezulu esango kunomthamo wombane wesixhobo uyafuneka.Ubugcisa obufana ne-bootstrapping okanye iimpompo zentlawulo kufuneka zidityaniswe, ukwandisa iindleko kunye nokunciphisa inzuzo yeendleko zokuqala zeeMOSFET.
Malunga neMveliso
Umlawuli we-LM46001-Q1 yinkqubo ekulula ukuyisebenzisa i-synchronous step-down-down-down DC-DC converter ekwazi ukuqhuba ukuya kwi-1 A yomthwalo wangoku ukusuka kwi-voltage yegalelo ukusuka kwi-3.5 V ukuya kwi-60 V. I-LM46001-Q1 inika ukusebenza kakuhle okukhethekileyo, ukuchaneka kwemveliso kunye ne-voltage yokuyeka kwisisombululo esincinci kakhulu.Intsapho eyandisiweyo ifumaneka kwi-0.5-A kunye ne-2-A iinketho zangoku zokulayisha kwiipakethi ezihambelanayo ze-pin-to-pin.Incopho yolawulo lwemowudi yangoku isetyenziselwe ukufezekisa imbuyekezo yelophu yolawulo olulula kunye nomjikelezo-ngomjikelo wangoku umda.Iimpawu ezikhethwayo ezifana ne-programmable switching frequency, ulungelelwaniso, iflegi elungileyo, ukuchaneka kukuvumela, ukuqala okuthambileyo kwangaphakathi, ukuqala okuthambileyo okwandisiweyo, kunye nokulandela umkhondo kubonelela ngeqonga eliguquguqukayo nelilula ukulisebenzisa kuluhlu olubanzi lwezicelo.Ukuqhuba okungapheliyo kunye nokunciphisa amaza okuzenzekelayo kwimithwalo ekhanyayo kuphucula ukusebenza kakuhle komthwalo wokukhanya.Usapho lufuna amacandelo ambalwa angaphandle kunye nolungiselelo lwephini luvumela i-PCB elula, elolona uyilo.Iimpawu zokukhusela zibandakanya ukuvala i-thermal, i-VCC i-undervoltage lockout, umda wangoku we-cycle-by-cycle, kunye ne-output-short-circuit protection.Isixhobo se-LM46001-Q1 sifumaneka kwi-16-pin HTSSOP (PWP) iphakheji (6.6 mm × 5.1 mm × 1.2 mm) kunye ne-0.65-mm ehamba phambili.Isixhobo si-pin-to-pin sihambelana ne-LM4360x kunye ne-LM4600x iintsapho.Uguqulelo lwe-LM46001A-Q1 lulungiselelwe ukusebenza kwe-PFM kwaye kucetyiswa kuyilo olutsha.
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