Ib qho kev pabcuam 2022+ hauv Tshuag Thawj&Tshiab IC CHIPS Electronics Cheebtsam LM25118Q1MH/NOPB
Yam khoom
| HOM | Kev piav qhia |
| Qeb | Integrated Circuits (ICs) PMIC - Voltage Regulators - DC DC Switching Controllers |
| Mfr | Texas Instruments |
| Series | Automotive, AEC-Q100 |
| Pob | Tube |
| SPQ | 73 cev |
| Yam khoom | Active |
| Hom tso zis | Transistor Tsav |
| Muaj nuj nqi | Kauj ruam-Up, Kauj ruam-down |
| Output Configuration | Qhov zoo |
| Topology | Buck, Boost |
| Number of Outputs | 1 |
| Tshaj tawm Phase | 1 |
| Voltage - Khoom siv (Vcc / Vdd) | 3V ~ 42V |
| Zaus - Hloov | Mus txog 500 kHz |
| Duty Cycle (Max) | 75% |
| Synchronous Rectifier | No |
| Clock Sync | Yog lawm |
| Serial Interfaces | - |
| Tswj Nta | Pab kom, Zaus Tswj, Ramp, Soft Start |
| Ua haujlwm kub | -40 ° C ~ 125 ° C (TJ) |
| Mounting Hom | Nto Mount |
| Pob / Case | 20-PowerTSSOP (0.173", 4.40mm Dav) |
| Cov Khoom Muag Khoom Pob | 20-HTSOP |
| Base Product Number | TIAB SA 25118 |
Qhov txawv
A. Dab tsi yog qhov txawv ntawm qhov ntsuas hluav taws xob thiab lub tshuab hluav taws xob?
Voltage regulators thiab boosters, nyob rau hauv lub hauv paus ntsiab lus, voltage regulators thiab boosters tsis ntau txawv, thiab voltage regulators thiab boosters nyob rau hauv kev ua hauj lwm thiab siv, voltage regulators thiab boosters muaj qhov sib txawv loj.
Voltage regulator yog tsuas yog siv rau voltage instability, thiab voltage fluctuations kuj loj, nws voltage fluctuations tsis tau raws li ib txwm siv ntawm cov khoom siv hluav taws xob yuav tsum, thiab voltage regulator, yog tus fluctuation ntawm qhov loj, voltage stabilization, voltage stability nyob rau hauv ib tug. qee yam ntawm qhov tseem ceeb, kom ntseeg tau tias cov khoom siv hluav taws xob tuaj yeem ua haujlwm ib txwm.
Lub voltage regulator nyob rau hauv tus txheej txheem ntawm kev ua hauj lwm, yuav muaj tsawg voltage raws li zoo raws li high voltage, thaum lub voltage yog tsawg heev, lub voltage regulator yuav dhau voltage kab boost ua hauj lwm, thaum lub voltage siab dhau heev lawm voltage regulator yog qhov voltage rau kev ua haujlwm puck.Los xyuas kom meej tias qhov voltage yog du.Yog li ntawd, lub voltage regulator uas yuav boosted, kuj yuav ib tug phaw.
Boosters, los ntawm lub npe peb tuaj yeem pom kev siv cov khoom, uas yog, qhov hluav taws xob los txhawb cov khoom siv, thiab cov khoom siv no tsuas yog muab kev txhawb zog rau kev ua haujlwm.Thiab yog los muab tus nqi boost ruaj khov, xws li tus nqi txhawb zog yog 100V, thaum qhov hluav taws xob ntawm 300V txog 400V, qhov tso zis hluav taws xob ntawm lub zog kuj tseem yog los ntawm 400V rau 500V, txhawb kev siv cov txheej txheem, tsuas yog txhim kho. qhov voltage, tab sis tsis tuaj yeem stabilize qhov voltage, yog li lub koob tshuaj feem ntau yog siv nyob rau hauv qhov chaw uas qhov voltage kuj ruaj khov.Yog hais tias nyob rau hauv ib puag ncig ntawm nquag voltage fluctuations, cov zis voltage kuj fluctuating.
Nyob rau hauv qhov tseeb, boosters thiab voltage regulators los sib piv, vim hais tias cov hauj lwm ntawm ob tug ua tsis tau, kev siv tsis tau, yog li ob leeg tsis tuaj yeem ua qhov kev sib piv, thiab tsis tuaj yeem txiav txim seb leej twg yog tus zoo dua thiab leej twg yog tus phem dua, uas yuav tsum tau txiav txim siab. vim ib puag ncig.Kev siv cov cuab yeej tsim nyog tuaj yeem ua lub luag haujlwm, yog tias siv tsis raug, cov khoom siv yuav tsis ua haujlwm.
Txawm hais tias ob qho tib si tsis tuaj yeem txiav txim siab qhov zoo lossis qhov phem, yog tias peb tsis paub meej tias yuav siv lub koob yees duab lossis lub zog tswj hluav taws xob, yog tias peb muaj peev nyiaj txaus rau cov peev nyiaj, peb tuaj yeem xaiv ncaj qha rau qhov ntsuas hluav taws xob.Qhov no yog vim hais tias lub voltage regulator yog zoo kawg nkaus haum rau cov kev cai ntawm lub booster thiab qhov xwm ntawm lub booster txoj hauj lwm, nyob rau hauv cov nqe lus ntawm nws siv thiab kev ua tau zoo.Vim muaj kev sib txawv ntawm ib puag ncig thiab kev siv, cov regulator thiab boosters tsis tuaj yeem muab piv rau, yog li peb tsis tuaj yeem hais tias leej twg yog tus zoo thiab leej twg phem.
B.Dab tsi yog txhais los ntawm synchronous rectification?Dab tsi yog qhov txawv ntawm synchronous thiab non-synchronous?
Kev kho kom zoo ib txwm yog kev siv lub diode tus yam ntxwv ntawm tus neeg xyuas pib los kho qhov tam sim no, cov txheej txheem rectification tsis xav tau tib neeg kev tswj hwm.Vim hais tias tam sim no rau pem hauv ntej, thim rov qab txiav tawm, tab sis vim hais tias lub diode nws tus kheej yuav muaj tam sim no los ntawm voltage poob, cov txheej txheem rectification yuav poob zog, ua rau kub, thiab lub hwj chim conversion efficiency ntawm no rectification theem yuav raug rub.
Synchronous rectification txhais tau hais tias es tsis txhob siv lub diode nyob rau hauv rectification seem, MOS yog siv xwb.Vim tias MOS ua haujlwm nrog kev ua haujlwm tsawg heev, lub zog hluav taws xob tsawg tsawg poob, yog li lub zog hloov pauv tau nce ntxiv.Cov txheej txheem synchronous rectification yog xws li tias thaum hloov hluav taws xob los ntawm thawj sab mus rau sab thib ob yog qhov yuav tsum tau ua, MOS raj sib txuas ntawm sab thib ob qhib thiab tso cai rau tam sim no ntws los ntawm.Hloov pauv, thaum tsis tas yuav hloov hluav taws xob, MOS raj raug kaw, tiv thaiv qhov tam sim no los ntawm kev ntws.
Piv txwv li, nyob rau hauv ib tug flyback, thaum lub ntsiab switching tube yog switched tawm, lub synchronous rectifier MOS raj nyob rau hauv lub thib ob sab yog switched rau, cia tam sim no ntws.Thaum lub ntsiab hloov lub raj yog qhib, lub synchronous rectifier MOS yog switched tawm kom tsis txhob tam sim no ntws los ntawm thiab lub transformer khaws lub zog.Nyob rau hauv cov txheej txheem synchronous tiav, nws yog ib qho tsim nyog los tswj lub sijhawm rau thiab tawm ntawm ob qhov MOS, hloov pauv thiab kaw lawv los tsim ib qho synchronous rectifier, yog li nws yog hu ua synchronous rectification.Cov txheej txheem yog complex dua piv rau diode rectification.
Hais txog Khoom
LM25118-Q1 dav voltage ntau Buck-Boost switching regulator maub los nta tag nrho cov dej num tsim nyog los siv ib tug high-kev ua tau zoo, nqi-npaum Buck-Boost regulator siv tsawg kawg nkaus ntawm lwm yam khoom.Lub Buck-Boost topology tswj cov zis voltage tswj thaum lub input voltage yog tsawg dua los yog ntau tshaj qhov tso zis voltage ua rau nws tshwj xeeb tshaj yog haum rau automotive daim ntaub ntawv.LM25118 ua haujlwm raws li tus neeg tswj hwm phaw thaum lub zog tawm tswv yim txaus siab dua li qhov kev tswj hwm cov zis hluav taws xob thiab maj mam hloov mus rau hom puck-boost raws li cov tswv yim voltage nce mus txog qhov tso zis.Qhov no dual-mode txoj hauv kev tswj hwm kev tswj hwm ntau yam ntawm cov tswv yim voltages nrog kev pom kev hloov dua siab tshiab hauv hom puck thiab cov zis tawm tsis muaj teeb meem thaum lub sijhawm hloov pauv.Qhov no yooj yim-rau-siv maub los suav nrog cov tsav tsheb rau lub siab-sab phaw MOSFET thiab qis-sab boost MOSFET.Txoj kev tswj ntawm tus regulator yog raws li tam sim no hom tswj siv emulated tam sim no ramp.Emulated tam sim no hom tswj txo suab nrov rhiab heev ntawm mem tes-dav modulation Circuit Court, tso cai rau txhim khu kev qha tswj ntawm lub luag hauj lwm me me cycles tsim nyog nyob rau hauv high input voltage daim ntaub ntawv.Cov yam ntxwv tiv thaiv ntxiv muaj xws li kev txwv tam sim no, thermal shutdown, thiab ib qho kev tso cai nkag.Cov cuab yeej muaj nyob rau hauv lub zog-txhim kho, 20-pin HTSSOP pob featuring ib tug raug tuag xa ncoo los pab thermal dissipation.
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