Izingxenye ze-LM46001AQPWPRQ1 HTSSOP Okusha & Kwangempela Okuhloliwe Okudidiyelwe Kwe-Circuit IC Chips Electronics
Izimfanelo Zomkhiqizo
| UHLOBO | DESCRIPTION |
| Isigaba | Izifunda Ezihlanganisiwe (ICs) PMIC - Voltage Regulators - DC DC Ukushintsha Regulators |
| Mfr | Texas Instruments |
| Uchungechunge | Ezezimoto, i-AEC-Q100, SIMPLE SWITCHER® |
| Iphakheji | I-Tape & Reel (TR) Cut Tape (CT) I-Digi-Reel® |
| SPQ | 250T&R |
| Isimo somkhiqizo | Iyasebenza |
| Umsebenzi | Isinyathelo-Phansi |
| Ukucushwa Kokukhiphayo | Okuhle |
| I-Topology | Buck |
| Uhlobo Lokukhiphayo | Kuyalungiseka |
| Inombolo Yemiphumela | 1 |
| I-Voltage - Okokufaka (Okuncane) | 3.5V |
| I-Voltage - Okokufaka (Ubukhulu) | 60V |
| I-Voltage - Okukhiphayo (Okuncane/Okulungisiwe) | 1V |
| I-Voltage - Okukhiphayo (Ubukhulu) | 28V |
| Okwamanje - Okukhiphayo | 1A |
| Imvamisa - Ukushintsha | 200kHz ~ 2.2MHz |
| I-synchronous Rectifier | Yebo |
| Izinga Lokushisa Lokusebenza | -40°C ~ 125°C (TJ) |
| Uhlobo Lokukhweza | INtaba Engaphezulu |
| Iphakheji / Ikesi | 16-TSSOP (0.173", 4.40mm Ububanzi) Iphedi Eliveziwe |
| Iphakheji Yedivayisi Yomhlinzeki | 16-HTSSOP |
| Inombolo Yomkhiqizo Eyisisekelo | LM46001 |
Izinzuzo
Ukuqhathaniswa kwezinzuzo zokushintshwa okuhlanganisiwe kanye nokushintsha kwangaphandle kwabaguquli bebuck
1. Amaswishi angaphandle aqhathaniswa ahlanganisiwe.
Kunokushintsha okuningana okudidiyelwe kanye nokushintsha kwangaphandle kuzixazululo ze-buck converter, lokhu kwakamuva okuvame ukubizwa ngokuthi izilawuli zokusuka phansi noma zebhaka.Lezi zinhlobo ezimbili zokushintsha zinezinzuzo ezihlukile kanye nokubi ngakho-ke ukukhetha phakathi kwazo kufanele kwenziwe kucatshangelwa izinzuzo nezinkinga zazo.
Ukushintsha okuningi okuhlanganisiwe kunenzuzo yokuba nenani eliphansi lengxenye, inzuzo evumela ukuthi lezi zinguquko zibe nosayizi omncane futhi zisetshenziswe ezinhlelweni eziningi eziphansi zamanje.Ngenxa yemvelo yazo ehlanganisiwe, zonke zibonisa ukusebenza kahle kwe-EMI kuyilapho zivikelekile ekushiseni okuphezulu noma kwamanye amathonya angaphandle angase avele.Kodwa-ke, futhi banesimo esibi semingcele yamanje neyokushisa;kuyilapho ukushintshwa kwangaphandle kunikeza ukuguquguquka okukhulu, namandla okuphatha amanje anomkhawulo kuphela ukukhetha ama-FET angaphandle.Ngasohlangothini olubi, ukushintsha kwangaphandle kudinga izingxenye eziningi futhi kufanele kuvikelwe ezinkingeni ezingaba khona.
Ukuze uphathe imisinga ephakeme, ukushintsha kufanele futhi kube kukhudlwana, okwenza ukuhlanganisa kubize kakhulu njengoba kuthatha indawo ebaluleke kakhulu ku-chip futhi kudinga iphakheji elikhulu.Ukusetshenziswa kwamandla nakho kuyinselele.Ngakho-ke, singaphetha ngokuthi kuma-currents okukhiphayo aphezulu (imvamisa ngaphezu kwe-5A), ukushintsha kwangaphandle kuyisinqumo esikhethwayo.
2. Ukuvumelanisa kuqhathaniswa nokulungiswa okuvumelanayo
Isiguquli sebhake lesilungisisi esingavumelanisi noma esingavumelanisi esineswishi eyodwa kuphela sidinga i-diode yokuqhubeka endleleni ephansi, kuyilapho kusiguquli sebhake lesilungisisi esivumelanayo esinamaswishi amabili iswishi yesibili ingena esikhundleni se-continuity diode eshiwo ngenhla.Uma kuqhathaniswa nezixazululo ezivumelanisiwe, ama-rectifiers asynchronous anenzuzo yokuhlinzeka ngesisombululo esishibhile, kodwa ukusebenza kahle kwabo akuphakeme kakhulu.
Ukusebenzisa i-topology yesilungisi evumelanayo nokuxhuma i-Schottky diode yangaphandle ngokuhambisana neswishi yezinga eliphansi kuzonikeza ukusebenza kahle okuphezulu kakhulu.Ubunkimbinkimbi obuphezulu balokhu kushintsha kwezinga eliphansi kwandisa ukusebenza kahle ngenxa yokuba khona kokwehla kwamandla kagesi aphansi esimweni "sokuvuliwe" uma kuqhathaniswa ne-Schottky diode.Ngesikhathi sokudayisa (lapho amaswishi womabili ecishiwe), i-Schottky diode yangaphandle inokusebenza okuphansi kokuyeka uma kuqhathaniswa nesango langaphakathi lesango le-FET.
3. Isinxephezelo sangaphandle vs
Ngokuvamile, izilawuli zezimali ezinokushintsha kwangaphandle zinganikeza isinxephezelo sangaphandle njengoba zifanele uhla olubanzi lwezinhlelo zokusebenza.Isinxephezelo sangaphandle sisiza ukulungisa iluphu yokulawula ezintweni ezahlukahlukene zangaphandle njengama-FET, ama-inductors, nama-output capacitor.
Kuziguquli ezinokushintsha okuhlanganisiwe, kokubili isinxephezelo sangaphandle nesangaphakathi ngokuvamile sisetshenziswa.Isinxephezelo sangaphakathi sinika amandla imijikelezo yokuqinisekisa yenqubo eshesha kakhulu namasayizi amancane esixazululo se-PCB.
Izinzuzo zesinxephezelo sangaphakathi zingafingqwa njengokusebenziseka kalula (njengoba isihlungi esiphumayo kuphela esidinga ukumiswa), ukuklama okusheshayo, kanye nenani elincane lezingxenye, ngaleyo ndlela kunikeze isisombululo sosayizi omncane wezinhlelo zokusebenza zamanje eziphansi.Ububi ukuthi aziguquguquki kancane futhi isihlungi esiphumayo kufanele sifakwe ngaphansi kwesinxephezelo sangaphakathi.Isinxephezelo sangaphandle sinikeza ukuguquguquka okukhulu futhi singalungiswa ngokuvumelana nesihlungi esikhethiwe, kuyilapho isinxephezelo singaba isisombululo esincane samaza amakhulu, kodwa lolu hlelo lokusebenza lunzima kakhulu.
4. Ukulawula imodi yamanje ngokumelene nokulawula imodi ye-voltage
Isilawuli ngokwaso singalawulwa kumodi ye-voltage noma imodi yamanje.Ekulawulweni kwemodi kagesi, amandla kagesi okukhiphayo anikeza impendulo eyinhloko kuluphu yokulawula, futhi isinxephezelo se-feedforward ngokuvamile sisetshenziswa kusetshenziswa i-voltage yokufaka njengeluphu yokulawula yesibili ukuze kuthuthukiswe indlela yokusabela yesikhashana;ekulawuleni imodi yamanje, okwamanje kunikeza impendulo eyinhloko kuluphu yokulawula.Kuye nge-loop yokulawula, le yamanje ingaba okokufaka kwamanje, i-inductor yamanje, noma i-output current.Iluphu yokulawula yesibili i-voltage ephumayo.
Ukulawula imodi yamanje kunenzuzo yokunikeza impendulo esheshayo yeluphu yempendulo, kodwa kudinga isinxephezelo semithambeka, ukushintsha isihlungi somsindo esilinganisweni samanje, nokulahlekelwa kwamandla kuluphu yamanje yokuthola.Ukulawulwa kwemodi ye-voltage akudingi isinxephezelo semithambeka futhi kunikeza impendulo esheshayo yeluphu yempendulo ngesinxephezelo se-feedforward, nakuba impendulo yesikhashana inconywa lapha ukuze kuthuthukiswe ukusebenza, isifunda sokukhulisa iphutha singadinga umkhawulokudonsa ophezulu.
Kokubili ama-topology emodi yamanje kanye nemodi ye-voltage afanele ukushunwa ukuze asetshenziswe ezinhlelweni eziningi.Ezimweni eziningi, ama-topology okulawula imodi yamanje adinga ukuphikiswa okungeziwe kwamanje kokutholwa kweluphu;Ama-topology emodi kagesi anesinxephezelo esihlanganisiwe sokuphakela phambili afinyelela impendulo ecishe ifane yeluphu yempendulo futhi awadingi isimelaphi samanje sokutholwa kweluphu.Ngaphezu kwalokho, isinxephezelo sokudlulisela phambili senza idizayini yesinxephezelo ibe lula.Intuthuko eminingi yesigaba esisodwa yenziwe kusetshenziswa i-voltage-mode control topology.
5. Ukushintsha, ama-MOSFET kanye nama-MOSFET
Amaswishi asetshenziswa okuvamile namuhla ama-MOSFET athuthukisiwe futhi kukhona iziguquli nezilawuli eziningi zokusuka phansi/ ezehlayo ezisebenzisa ama-MOSFET kanye nabashayeli be-PMOSFET.Ama-MOSFET ngokuvamile anikeza ukusebenza okubiza kakhulu kunama-MOSFET futhi ukujikeleza komshayeli kule divayisi kuyinkimbinkimbi kakhulu.Ukuze uvule futhi uvale i-NMOSFET, i-voltage yesango ephezulu kunevoltheji yokufaka yedivayisi iyadingeka.Ubuchwepheshe obufana ne-bootstrapping noma amaphampu wokushaja kufanele ahlanganiswe, kukhuliswe izindleko futhi kuncishiswe inzuzo yezindleko zokuqala zama-MOSFET.
Mayelana Nomkhiqizo
Isilawuli se-LM46001-Q1 iyisiguquli esisebenziseka kalula sokuya phansi se-DC-DC esisebenziseka kalula esikwazi ukushayela kufikela ku-1 A womthwalo wamanje ukusuka ku-voltage yokufaka esukela ku-3.5 V kuya ku-60 V. I-LM46001-Q1 inikeza ukusebenza kahle okukhethekile, ukunemba kokuphumayo kanye ne-voltage yokuyeka ngosayizi wesixazululo esincane kakhulu.Umndeni onwetshiwe uyatholakala ngezinketho zamanje zokulayisha okungu-0.5-A no-2-A kumaphakheji ahambisanayo pin-to-pin.Ukulawulwa kwemodi yamanje ephezulu kusetshenziselwa ukuzuza isinxephezelo esilula se-loop kanye nomkhawulo wamanje womjikelezo nomjikelezo.Izici ongazikhetha ezifana nemvamisa yokushintsha ehlelekayo, ukuvumelanisa, ifulegi lamandla, ukunika amandla ukunemba, isiqalo esithambile sangaphakathi, isiqalo esithambile esinwebekayo, nokulandelela kunikeza inkundla eguquguqukayo nesebenziseka kalula yezinhlelo zokusebenza eziningi ezahlukene.Ukuqhutshwa okungaqhubeki nokunciphisa imvamisa okuzenzakalelayo ekulayishweni kokukhanya kuthuthukisa ukusebenza kahle komthwalo wokukhanya.Umndeni udinga izingxenye ezimbalwa zangaphandle kanye nokuhlelwa kwephinikhodi kuvumela isakhiwo se-PCB esilula, esikahle.Izici zokuvikela zifaka ukuvala shaqa okushisayo, ukuvala i-VCC undervoltage, umkhawulo wamanje womjikelezo nomjikelezo, nokuvikelwa kokukhishwa kwesekethe emfushane.Idivayisi ye-LM46001-Q1 iyatholakala kuphakheji ye-HTSSOP (PWP) engu-16-pin (6.6 mm × 5.1 mm × 1.2 mm) enephimbo eliholayo elingu-0.65-mm.Idivayisi iphini-to-pin ihambisana ne-LM4360x kanye nemindeni ye-LM4600x.Inguqulo ye-LM46001A-Q1 yenzelwe ukusebenza kwe-PFM futhi inconyelwe imiklamo emisha.
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