Inkonzo enye yokumisa i-2022+ kwisitokhwe yoqobo&entsha ye-IC CHIPS yoMbane yoMxholwana we-LM25118Q1MH/NOPB
Iimpawu zeMveliso
| UHLOBO | INKCAZO |
| Udidi | IiSekethe eziDityanisiweyo (ICs) I-PMIC - IziLawuli ze-Voltage - DC DC Switching Controllers |
| Mfr | Texas Instruments |
| Uthotho | Iimoto, AEC-Q100 |
| Iphakheji | Umbhobho |
| SPQ | 73Tube |
| Ubume beMveliso | Iyasebenza |
| Uhlobo Lwemveliso | Umqhubi weTransistor |
| Umsebenzi | Inyathelo-Phezulu, iNyathela-Phantsi |
| Uqwalaselo Lwemveliso | Okuhle |
| I-Topology | Buck, Khuthaza |
| Inani leZiphumo | 1 |
| Izigaba zeziphumo | 1 |
| Voltage - Ubonelelo (Vcc/Vdd) | 3V ~ 42V |
| Ukuphindaphinda-Ukutshintsha | Ukuya kuthi ga kwi-500kHz |
| Umjikelo woMsebenzi (Ubukhulu) | 75% |
| Ungqamaniso loLungisanisi | No |
| Sync Clock | Ewe |
| Uthotho lwe Interfaces | - |
| Iimpawu zokulawula | Yenza, Ulawulo lokuphindaphinda, i-Ramp, i-Soft Start |
| Ubushushu bokusebenza | -40°C ~ 125°C (TJ) |
| Uhlobo lokuNqamisa | INtaba engaphezulu |
| Ipakethe / Ityala | 20-PowerTSSOP (0.173", 4.40mm Ububanzi) |
| Supplier Device Package | 20-HTSSOP |
| Inombolo yeMveliso esisiseko | LM25118 |
Umahluko
A. Uthini umahluko phakathi kwe-voltage regulator kunye ne-booster?
Abalawuli bamandla ombane kunye nee-boosters, ngokomgaqo, izilawuli zombane kunye nee-boosters azihlukanga kangako, kwaye izilawuli zombane kunye ne-booster ekusebenzeni nasekusebenziseni, izilawuli zombane kunye nee-boosters zinomohluko omkhulu.
Isilawuli se-voltage sisetyenziselwa ukungazinzi kwamandla ombane, kwaye ukuguquguquka kwamandla ombane kukhulu, ukuhla kwamandla ombane akukwazi ukuhlangabezana nokusetyenziswa okuqhelekileyo kweemfuno zezixhobo zombane, kunye ne-voltage regulator, kukuguquguquka okukhulu, ukuzinza kwamandla ombane, ukuzinza kombane kwindawo uluhlu oluthile lwamaxabiso, ukuqinisekisa ukuba izixhobo zombane zinokusebenza ngokuqhelekileyo.
Isilawuli samandla ombane kwinkqubo yokusebenza, kuya kubakho amandla ombane aphantsi kakhulu kunye namandla ombane aphezulu kakhulu, xa amandla ombane ephantsi kakhulu, isilawuli samandla ombane siya kuba phezu komsebenzi wokunyusa umbane, xa umbane uphezulu kakhulu, amandla ombane umlawuli ngumbane womsebenzi webhaki.Ukuqinisekisa ukuba i-voltage ilungile.Ke i-voltage regulator enokuthi inyuswe, inokuba yibhaki.
Ii-Boosters, ukusuka kwigama sinokubona ukusetyenziswa kwemveliso, oko kukuthi, i-voltage yokunyusa iseti yezixhobo, kwaye esi sixhobo sibonelela kuphela ngomsebenzi wokunyusa umbane.Kwaye kukubonelela ngexabiso elimiselweyo lokunyusa, njengexabiso le-booster booster yi-100V, xa i-voltage esuka kwi-300V ukuya kwi-400V, i-voltage ephumayo ye-booster nayo iya kuvela kwi-400V ukuya kwi-500V, i-booster ekusebenziseni inkqubo, inokuphucula kuphela. i-voltage, kodwa ayikwazi ukuzinzisa i-voltage, ngoko ke i-booster isetyenziswa ngokubanzi kwiindawo apho i-voltage izinzileyo.Ukuba kwimeko yokuguquguquka rhoqo kwamandla ombane, i-voltage ephumayo nayo iyaguquguquka.
Enyanisweni, i-boosters kunye ne-voltage regulators ukuthelekisa, ngenxa yokuba umsebenzi wesibini awukwazi, ukusetyenziswa akusetyenziswanga, ngoko bobabini abanako ukwenza uthelekiso, kwaye abanakukwazi ukugweba ukuba ngubani na ongcono kwaye ngubani ombi ngakumbi, efuna ukugwetywa. ngenxa yokusingqongileyo.Ukusebenzisa izixhobo ezifanelekileyo kunokudlala indima, ukuba ukusetyenziswa kakubi, ngoko ke izixhobo aziyi kusebenza.
Nangona ezi zimbini zingenakugwetywa zilungileyo okanye ezimbi, ukuba asiqinisekanga ukuba sisebenzise i-booster okanye i-voltage regulator, ukuba sinemali eyaneleyo yohlahlo lwabiwo-mali, sinokukhetha ngokuthe ngqo umlawuli wombane.Oku kungenxa yokuba i-voltage regulator ifaneleke ngokugqibeleleyo kwiimfuno ze-booster kunye nohlobo lomsebenzi we-booster, ngokubhekiselele ekusebenziseni kwayo kunye nokusebenza kwayo.Ngenxa yeemeko ezahlukeneyo kunye nokusetyenziswa, umlawuli kunye ne-booster ayinakuthelekiswa, ngoko asikwazi ukutsho ukuba ngubani olungileyo kwaye ngubani ongalunganga.
B.Kuthetha ukuthini ulungiso oluhambelanayo?Uthini umahluko phakathi kwe-synchronous kunye ne-non-synchronous?
Ukulungiswa okuqhelekileyo kukusetyenziswa kweempawu zomqhubi omnye we-diode ukulungisa okwangoku, inkqubo yokulungiswa ayifuni ukulawula komntu.Ngenxa yokuba umphambili wangoku, umva unqanyuliwe, kodwa ngenxa yokuba i-diode ngokwayo iya kuba yangoku ngokuhla kwamandla ombane, inkqubo yokulungiswa iya kuphelelwa ngamandla, ibangele ubushushu, kwaye ukuguqulwa kwamandla okuphumelela kwesi sigaba sokulungiswa kuya kutsalwa phantsi.
Ukulungiswa kwe-synchronous kuthetha ukuba endaweni yokusebenzisa i-diode kwicandelo lokulungiswa, i-MOS isetyenziswe endaweni.Ngenxa yokuba i-MOS iqhuba ngokuchasana okuncinci kakhulu, isizukulwana sobushushu sinamandla amancinci alahlekileyo, ngoko ke ukuguqulwa kwamandla okusebenza kuyanda.Inkqubo yokulungiswa kwe-synchronous kukuba xa ukuhanjiswa kwamandla ukusuka kwicala eliphambili ukuya kwicala lesibini lifunekayo, ityhubhu ye-MOS ehambelanayo kwicala lesibini ivula kwaye ivumela ukuba i-current ihambe.Ngokwahlukileyo, xa ukuhanjiswa kwamandla kungafuneki, ityhubhu ye-MOS icinyiwe, ukuthintela ukugeleza kwangoku.
Ukubonisa, kwi-flyback, xa ityhubhu engundoqo yokutshintsha icinyiwe, i-synchronous rectifier MOS ityhubhu kwicala lesibini itshintshiwe, ivumela ukuhamba kwangoku.Xa i-tube yokutshintsha engundoqo ivuliwe, i-synchronous rectifier MOS iyacinywa ukumisa i-current ukuba ihambe kwaye i-transformer igcina amandla.Kwinkqubo yokugqiba i-synchronous, kuyimfuneko ukulawula ixesha lokuvula kunye nokucima kwiindawo ezimbini ze-MOS, ngokutshintshana ukuvula kunye nokuvala ukwenza i-synchronous rectifier, ngoko kubizwa ngokuba yi-synchronous rectification.Inkqubo inzima ngakumbi xa kuthelekiswa nokulungiswa kwediode.
Malunga neMveliso
Uluhlu lwe-LM25118-Q1 olubanzi lwe-voltage ye-Buck-Boost switching regulator isilawuli sibonakalisa yonke imisebenzi eyimfuneko ukuphumeza ukusebenza okuphezulu, ukulawulwa kwe-Buck-Boost ephantsi kweendleko usebenzisa ubuncinci bamacandelo angaphandle.I-Buck-Boost topology igcina ukulawulwa kwamandla ombane xa igalelo lombane lingaphantsi okanye lilikhulu kunombane ophumayo liwenza ukuba alungele ukusetyenziswa kweemoto.I-LM25118 isebenza njengomlawuli we-buck ngelixa i-voltage yegalelo inkulu ngokwaneleyo kune-voltage ephumayo elawulwayo kwaye ngokuthe ngcembe itshintshela kwimo ye-buck-boost njengoko igalelo lombane lisondela kwimveliso.Le ndlela yeendlela ezimbini igcina ummiselo phezu koluhlu olubanzi lwee-voltages zegalelo kunye nokusebenza kakuhle kokuguqulwa kwimodi ye-buck kunye nokukhutshwa kwe-glitch-free ngexesha lokutshintsha kwemo.Esi silawuli kulula ukusisebenzisa sibandakanya abaqhubi be-MOSFET yecala eliphezulu kunye ne-low-side boost MOSFET.Indlela yokulawula yomlawuli isekwe kulawulo lwemowudi yangoku kusetyenziswa irempu yangoku efanisiweyo.Ulawulo lwemowudi yangoku elinganisiweyo kunciphisa uvakalelo lwengxolo ye-pulse-width modulation circuit, ivumela ulawulo oluthembekileyo lomjikelo omncinci kakhulu womsebenzi oyimfuneko kusetyenziso lwamandla ombane aphezulu.Iimpawu ezongezelelweyo zokukhusela ziquka umda wangoku, ukuvalwa kwe-thermal, kunye negalelo elivumelayo.Isixhobo sifumaneka kumbane ophuculweyo, i-20-pin ye-HTSSOP ipakethe ebonisa idiyidi edityanisiweyo eveziweyo yokuncedisa ukutshabalalisa i-thermal.
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