Isevisi yokuma okukodwa engu-2022+ esitokweni Original&New IC CHIPS Electronics Components LM25118Q1MH/NOPB
Izimfanelo Zomkhiqizo
| UHLOBO | DESCRIPTION |
| Isigaba | Izifunda Ezihlanganisiwe (ICs) PMIC - Voltage Regulators - DC DC Switching Controllers |
| Mfr | Texas Instruments |
| Uchungechunge | Ezezimoto, AEC-Q100 |
| Iphakheji | Ithubhu |
| SPQ | 73Ithubhu |
| Isimo somkhiqizo | Iyasebenza |
| Uhlobo Lokukhiphayo | Umshayeli we-Transistor |
| Umsebenzi | Isinyathelo-phezulu, Yehla |
| Ukucushwa Kokukhiphayo | Okuhle |
| I-Topology | Buck, Boost |
| Inombolo Yemiphumela | 1 |
| Izigaba Zokukhiphayo | 1 |
| I-Voltage - Supply (Vcc/Vdd) | 3V ~ 42V |
| Imvamisa - Ukushintsha | Kufika ku-500kHz |
| Umjikelezo Womsebenzi (Ubukhulu) | 75% |
| I-synchronous Rectifier | No |
| Ukuvumelanisa Iwashi | Yebo |
| I-Serial Interfaces | - |
| Lawula izici | Nika amandla, Ukulawula Imvamisa, Irempu, Isiqalo Esithambile |
| Izinga Lokushisa Lokusebenza | -40°C ~ 125°C (TJ) |
| Uhlobo Lokukhweza | INtaba Engaphezulu |
| Iphakheji / Ikesi | 20-PowerTSSOP (0.173", 4.40mm Ububanzi) |
| Iphakheji Yedivayisi Yomhlinzeki | 20-HTSSOP |
| Inombolo Yomkhiqizo Eyisisekelo | LM25118 |
Umehluko
A. Uyini umehluko phakathi kwe-voltage regulator kanye ne-booster?
Izilawuli zamandla kagesi nama-booster, ngokomthetho, izilawuli zikagesi kanye nama-booster azihlukile kakhulu, futhi izilawuli zikagesi kanye nama-booster ekusebenzeni nasekusetshenzisweni, izilawuli zikagesi kanye nama-booster anomehluko omkhulu.
I-voltage regulator isetshenziselwa ikakhulukazi ukungazinzi kwamandla kagesi, futhi ukushintshashintsha kwamandla kagesi kukhulu uma kuqhathaniswa, ukushintshashintsha kwamandla kagesi akukwazi ukuhlangabezana nokusetshenziswa okuvamile kwezidingo zemishini kagesi, futhi isilawuli sikagesi siwukuguquguquka kokukhudlwana, ukuzinza kwamandla kagesi, ukuzinza kwe-voltage endaweni uhla oluthile lwamanani, ukuqinisekisa ukuthi izinto zikagesi zingasebenza ngokujwayelekile.
I-voltage regulator ngesikhathi sokusebenza, kuzoba ne-voltage ephansi kakhulu kanye ne-voltage ephezulu kakhulu, lapho i-voltage iphansi kakhulu, isilawuli sikagesi sizoba ngaphezu komsebenzi wokukhulisa umugqa kagesi, lapho i-voltage iphezulu kakhulu, i-voltage. i-regulator yi-voltage yomsebenzi we-buck.Ukuqinisekisa ukuthi i-voltage ibushelelezi.Ngakho-ke isilawuli se-voltage esingathuthukiswa, singaba yimali.
Ama-boosters, egameni singabona ukusetshenziswa komkhiqizo, okungukuthi, i-voltage yokuthuthukisa isethi yemishini, futhi le mishini inikeza kuphela umsebenzi wokukhulisa amandla kagesi.Futhi ukuhlinzeka ngenani elilinganiselwe le-booster, njenge-booster boost value ingu-100V, lapho i-voltage esuka ku-300V iye ku-400V, i-voltage ephumayo ye-booster izophinde isuke ku-400V iye ku-500V, i-booster ekusebenziseni inqubo, ingathuthukisa kuphela I-voltage, kodwa ayikwazi ukuzinzisa i-voltage, ngakho-ke i-booster ivame ukusetshenziswa ezindaweni lapho i-voltage iqinile ngokuqhathaniswa.Uma endaweni yokuguquguquka kwe-voltage okuvamile, i-voltage ephumayo nayo iyashintshashintsha.
Eqinisweni, ama-booster kanye ne-voltage regulators ukuqhathanisa, ngoba umsebenzi walaba ababili abakwazi, ukusetshenziswa akusetshenzisiwe, ngakho-ke bobabili abakwazi ukwenza isiqhathaniso, futhi abakwazi ukwahlulela ukuthi ubani ongcono futhi omubi kakhulu, okudingeka ahlulelwe. ngenxa yemvelo.Ukusebenzisa imishini efanele kungadlala indima, uma ukusetshenziswa okungalungile, khona-ke okokusebenza ngeke kusebenze.
Nakuba lezi ezimbili azikwazi ukwahlulelwa okuhle noma okubi, uma singaqiniseki ukuthi sizosebenzisa i-booster noma i-voltage regulator, uma sinemali eyanele yesabelomali, singakhetha ngokuqondile isilawuli se-voltage.Lokhu kungenxa yokuthi i-voltage regulator ifaneleka ngokuphelele ezidingweni ze-booster kanye nemvelo yomsebenzi we-booster, mayelana nokusetshenziswa nokusebenza kwayo.Ngenxa yezindawo ezihlukene kanye nokusetshenziswa, isilawuli kanye ne-booster ayikwazi ukuqhathaniswa, ngakho-ke asikwazi ukusho ukuthi ubani omuhle nokuthi ubani omubi.
B.Kusho ukuthini ukulungiswa okuhambisanayo?Uyini umehluko phakathi kwe-synchronous ne-non-synchronous?
Ukulungiswa okuvamile ukusetshenziswa kwezici ze-conductor eyodwa ye-diode ukuze kulungiswe okwamanje, inqubo yokulungisa ayidingi ukulawula komuntu.Ngenxa yokuthi i-current forward, i-reverse cut-off, kodwa ngenxa yokuthi i-diode ngokwayo izoba namandla ngokuhla kwe-voltage, inqubo yokulungisa izolahlekelwa amandla, okuzoholela ekushiseni, futhi ukusebenza kahle kokuguqulwa kwamandla kwalesi sigaba sokulungisa kuzodonselwa phansi.
Ukulungiswa kokuvumelanisa kusho ukuthi esikhundleni sokusebenzisa i-diode esigabeni sokulungisa, kusetshenziswa i-MOS esikhundleni salokho.Ngenxa yokuthi i-MOS iqhuba ngokumelana okuncane kakhulu, isizukulwane sokushisa silahlekelwa amandla amancane, ngakho-ke ukusebenza kahle kokuguqulwa kwamandla kuyanda.Inqubo yokulungiswa kokuvumelanisa iwukuthi lapho ukudluliswa kwamandla kusuka ohlangothini oluyinhloko kuya ohlangothini lwesibili kuyadingeka, ishubhu le-MOS elihambisanayo ohlangothini lwesibili liyavuleka futhi livumele lamanje ukuthi ligeleze.Ngokuphambene, lapho ukudluliswa kwamandla kungadingeki, ithubhu ye-MOS iyacishwa, ivimbele ukugeleza kwamanje.
Ukuze sifanekise, ku-flyback, lapho ishubhu yokushintsha eyinhloko icishiwe, ishubhu le-MOS lesilungisisi esivumelanayo elisohlangothini lwesibili liyavulwa, livumele lamanje ukuthi ligeleze.Lapho ishubhu lokushintsha eliyinhloko livulwa, isilungisi se-synchronous MOS siyacishwa ukuze kumiswe umbane ukuthi ungagelezi futhi isiguquli sigcina amandla.Enqubweni yokuqedela ehambisanayo, kuyadingeka ukulawula izikhathi zokuvula nokuvala zezingxenye ezimbili ze-MOS, ngokushintshana uzivule futhi uzivale ukuze wakhe isilungisisi esivumelanayo, ngakho-ke kubizwa ngokuthi ukulungiswa okuvumelanayo.Inqubo iyinkimbinkimbi kakhulu uma iqhathaniswa nokulungiswa kwe-diode.
Mayelana Nomkhiqizo
Isilawuli se-LM25118-Q1 esibanzi samandla kagesi we-Buck-Boost sihlanganisa yonke imisebenzi edingekayo ukuze kusetshenziswe isilawuli se-Buck-Boost esisebenza kahle kakhulu, esingabizi kakhulu sisebenzisa ubuncane bezingxenye zangaphandle.I-Buck-Boost topology igcina ukulawulwa kwamandla kagesi okukhiphayo lapho i-voltage yokufaka ingaphansi noma inkulu kune-voltage ephumayo iyenza ifaneleke ikakhulukazi izinhlelo zokusebenza zezimoto.I-LM25118 isebenza njengesilawuli sempunzi kuyilapho i-voltage yokufaka inkulu ngokwanele kune-voltage ephumayo elawulwayo futhi kancane kancane ishintshela kumodi ye-buck-boost njengoba i-voltage yokufaka isondela kokuphumayo.Le ndlela yemodi ekabili igcina umthetho phezu kwebanga elibanzi lama-voltage okokufaka ngokusebenza kahle kokuguqula kumodi yebhali kanye nokuphumayo okungaphazamisi phakathi noshintsho lwemodi.Lesi silawuli esisebenziseka kalula sihlanganisa abashayeli be-MOSFET esezingeni eliphezulu kanye ne-low-side boost MOSFET.Indlela yokulawula yesilawuli isuselwe ekulawuleni imodi yamanje kusetshenziswa irempu yamanje elingisiwe.Ukulawulwa kwemodi yamanje okulingiswayo kunciphisa ukuzwela komsindo wesekethe yokuguquguquka kobubanzi be-pulse-width, okuvumela ukulawulwa okuthembekile kwemijikelezo yemisebenzi emincane edingekayo ezinhlelweni zokusebenza zamandla kagesi aphezulu.Izici ezingeziwe zokuvikela zifaka umkhawulo wamanje, ukuvala shaqa okushisayo, nokokufaka okunika amandla.Idivayisi itholakala kuphakheji ye-HTSSOP ethuthukisiwe, enamaphini angu-20 ehlanganisa iphedi yokunamathisela okudaye eveziwe ukuze isize ukushabalala kokushisa.
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