Thawj & Tshiab ic LMR14030SDDAR hloov regulator integrated nti Electronics Curcuits
Yam khoom
| HOM | Kev piav qhia |
| Qeb | Integrated Circuits (ICs) PMIC - Voltage Regulators - DC DC Hloov Regulators |
| Mfr | Texas Instruments |
| Series | SIMPLE SWITCHER® |
| Pob | Daim kab xev & Reel (TR) Daim kab xev (CT) Digi-Reel® |
| SPQ | 75Tube ua |
| Yam khoom | Active |
| Muaj nuj nqi | Kauj ruam-down |
| Output Configuration | Qhov zoo |
| Topology | Buck |
| Hom tso zis | Kho tau |
| Number of Outputs | 1 |
| Voltage - Cov tswv yim (Min) | 4V |
| Voltage - Input (Max) | 40v ua |
| Voltage - Tso zis (Min/Fixed) | 0,8v ua |
| Voltage - Tso zis (Max) | 28 v |
| Tam sim no - Tso zis | 3.5 A |
| Zaus - Hloov | 200 kHz ~ 2.5 MHz |
| Synchronous Rectifier | No |
| Ua haujlwm kub | -40 ° C ~ 125 ° C (TJ) |
| Mounting Hom | Nto Mount |
| Pob / Case | 8-PowerSOIC (0.154", 3.90mm Dav) |
| Cov Khoom Muag Khoom Pob | 8-SO PowerPad |
| Base Product Number | LWM 14030 |
Qhov txawv
Qhov sib txawv ntawm DC tswj cov khoom siv hloov hluav taws xob thiab cov khoom siv hluav taws xob tawm los ntawm kev txhais
Lawv qhov sib txawv loj dua yog cov kab hluav taws xob tswj hluav taws xob hauv lub raj (xws li bipolar lossis MOSFET) ua haujlwm hauv lub xeev linear, thaum lub zog hloov hluav taws xob hauv lub raj ua haujlwm hauv lub xeev hloov.
1. Lub ntsiab lus ntawm DC tswj kev hloov hluav taws xob
Lub zog hloov hluav taws xob yog txheeb ze rau cov khoom siv hluav taws xob linear.Switching fais fab mov yog los ntawm Circuit Court tswj switching raj rau high-ceev channel pass thiab txiav tawm.DC fais fab mov rau hauv high-frequency AC zog rau lub transformer rau voltage hloov dua siab tshiab, yog li tsim tau lub teeb los yog pab pawg neeg ntawm voltage!Txhawm rau muab nws yooj yim, lub tshuab hluav taws xob hloov pauv yog qhov hloov pauv.Hloov fais fab mov yog ua tiav los ntawm: rectification rau DC - inverted rau hauv qhov yuav tsum tau voltage AC (tsuas yog los kho qhov voltage) - thiab ces rectified rau DC voltage tso zis.
2. Lub ntsiab lus ntawm linear fais fab mov
Ib qho hluav taws xob tawm hluav taws xob yog lub tshuab hluav taws xob uas ua ntej txo qhov voltage amplitude ntawm qhov hloov tam sim no thiab tom qab ntawd kho nws los ntawm lub voj voog rectifier kom tau txais cov hluav taws xob ncaj qha tam sim no.Tom qab ntawd nws tau lim kom tau txais DC voltage nrog lub zog me me ripple.Yuav kom ua tiav qhov siab precision DC voltage, nws yuav tsum tau tswj los ntawm qhov hluav taws xob tswj hluav taws xob.
Qhov thib ob, qhov sib txawv ntawm txoj hauv kev ua haujlwm ntawm DC tswj kev hloov hluav taws xob thiab cov khoom siv hluav taws xob tawm
Lub hauv paus ntsiab lus ua haujlwm ntawm kev hloov hluav taws xob.
1. AC fais fab input lim los ntawm rectification rau DC;
2. Los ntawm high-frequency PWM (pulse width modulation) los yog mem tes zaus modulation (PFM) tswj switching tube, DC yuav muab ntxiv rau lub hauv paus ntawm lub switching transformer;
3. Qhov thib ob ntawm qhov hloov pauv hloov pauv induces ib tug high-frequency voltage, uas yog rectified thiab lim rau lub load;
4. Cov khoom tso tawm yog pub rov qab mus rau cov tswj hluav taws xob los ntawm qee qhov Circuit Court los tswj PWM lub luag haujlwm voj voog kom ua tiav cov zis ruaj khov.
Lub hauv paus ntsiab lus ua haujlwm ntawm linear fais fab mov.
1.Linear fais fab mov feem ntau suav nrog cov zaus transformer, tso zis rectifier lim, tswj Circuit Court, tiv thaiv Circuit Court, thiab lwm yam ...
Cov khoom siv hluav taws xob linear yog thawj lub zog AC los ntawm kev hloov pauv hluav taws xob, thiab tom qab ntawd los ntawm lub tshuab hluav taws xob rectifier rectifier lim kom tau txais qhov tsis ruaj khov DC voltage.Txhawm rau ua tiav qhov tseeb DC voltage, qhov tso zis hluav taws xob yuav tsum tau hloov kho los ntawm kev tawm tswv yim voltage.Cov cuab yeej siv hluav taws xob no yog qhov paub tab heev thiab tuaj yeem ua tiav kev ruaj ntseg nrog me ntsis ripple thiab tsis muaj kev cuam tshuam thiab suab nrov uas hloov cov khoom siv hluav taws xob muaj.Txawm li cas los xij, nws qhov tsis zoo yog tias nws yuav tsum muaj qhov hloov pauv loj thiab loj, qhov ntim thiab qhov hnyav ntawm qhov yuav tsum tau lim capacitor kuj loj heev, thiab cov lus tawm tswv yim hluav taws xob ua haujlwm nyob rau hauv lub xeev linear, yog li muaj qee qhov voltage poob ntawm kev hloov kho. raj, nyob rau hauv cov zis ntawm ib tug loj ua hauj lwm tam sim no, uas ua rau lub hwj chim noj ntawm lub adjustable raj yog loj heev, tsis tshua muaj conversion efficiency, tab sis kuj rau nruab ib lub dab dej kub loj.Cov khoom siv hluav taws xob no tsis haum rau cov khoos phis tawj thiab lwm yam khoom siv xav tau, yuav maj mam hloov los ntawm kev hloov hluav taws xob.
DC tswj kev hloov hluav taws xob thiab cov khoom siv hluav taws xob tawm hauv cov yam ntxwv ntawm qhov sib txawv.
Lub ntsiab zoo thiab qhov tsis zoo ntawm kev hloov fais fab mov
Qhov zoo: me me, lub teeb yuag (ntim thiab hnyav tsuas yog 20-30% ntawm cov khoom siv hluav taws xob), kev ua haujlwm siab (feem ntau 60-70%, thaum lub zog linear tsuas yog 30-40%), lawv tus kheej tiv thaiv kev cuam tshuam , ntau yam ntawm cov zis voltage, modularity.
Disadvantages: Vim lub high-frequency voltage generated nyob rau hauv lub inverter Circuit Court, muaj ib tug tej yam kev cuam tshuam rau cov khoom nyob ib puag ncig.Zoo shielding thiab earthing yuav tsum tau.
Linear fais fab mov nta.
Kev ruaj ntseg siab, me me ripple, muaj kev ntseeg siab, yooj yim los ua rau hauv ntau txoj kev tso zis tsis tu ncua hloov kho fais fab mov.Qhov tsis zoo yog tias lawv loj, loj, thiab tsis muaj zog.Hom kev tswj fais fab mov thiab muaj ntau yam, los ntawm qhov xwm txheej ntawm cov zis tuaj yeem muab faib ua cov tswj hluav taws xob hluav taws xob, tswj cov khoom siv hluav taws xob tam sim no thiab teeb tsa hluav taws xob, kev ruaj ntseg tam sim no nyob rau hauv qhov ruaj khov voltage, thiab tam sim no (dual-stable) fais fab mov.Tus nqi tso zis tuaj yeem muab faib ua cov khoom siv hluav taws xob ruaj khov, kev hloov pauv hloov hom, thiab potentiometer txuas ntxiv kho tau ntau yam.Los ntawm cov zis, qhov taw qhia tuaj yeem muab faib ua pointer indication type thiab digital display type.
DC tswj kev hloov hluav taws xob thiab cov khoom siv hluav taws xob tawm hauv cov yam ntxwv ntawm qhov sib txawv.
Lub ntsiab zoo thiab qhov tsis zoo ntawm kev hloov fais fab mov
Qhov zoo: me me, lub teeb yuag (ntim thiab hnyav tsuas yog 20-30% ntawm cov khoom siv hluav taws xob), kev ua haujlwm siab (feem ntau 60-70%, thaum lub zog linear tsuas yog 30-40%), lawv tus kheej tiv thaiv kev cuam tshuam , ntau yam ntawm cov zis voltage, modularity.
Disadvantages: Vim lub high-frequency voltage generated nyob rau hauv lub inverter Circuit Court, muaj ib tug tej yam kev cuam tshuam rau cov khoom nyob ib puag ncig.Zoo shielding thiab earthing yuav tsum tau.
Qhov sib txawv ntawm DC-tswj hloov cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob tawm hauv qhov kev thov
1. Hloov fais fab mov ntau ntawm daim ntawv thov
Hloov fais fab mov rau tag nrho qhov hluav taws xob ntau, tsis muaj qhov sib txawv, koj tuaj yeem siv lub tshuab hluav taws xob sib txawv kom ua tiav cov khoom siv sib txawv.Kev hloov kho tus nqi thiab cov zis tawm ripple tsis siab npaum li cov khoom siv hluav taws xob linear, thiab qhov ua tau zoo yog siab.Yuav tsum muaj ntau yam khoom siv peripheral thiab tus nqi siab.Lub Circuit Court yog qhov nyuaj.Hloov DC-tswj cov khoom siv hluav taws xob feem ntau yog ib qho kawg flyback, ib leeg-kawg rau pem hauv ntej, ib nrab-choj, thawb-rub, thiab tag nrho-bridge Circuit Court hom.Qhov sib txawv tseem ceeb ntawm nws thiab cov kab hluav taws xob tswj hluav taws xob yog qhov hloov pauv hauv Circuit Court tsis ua haujlwm ntawm kev khiav hauj lwm zaus tab sis ntawm ntau kaum ntawm kilohertz mus rau ntau megahertz.Lub hwj chim raj tsis ua hauj lwm nyob rau hauv lub linear cheeb tsam, tab sis nyob rau hauv lub saturation thiab txiav-tawm tsam, piv txwv li nyob rau hauv lub switching xeev;hom switching DC tswj fais fab mov yog li lub npe.
2. Cov peev txheej ntawm kev siv cov khoom siv hluav taws xob linear
Cov khoom siv hluav taws xob tswj hluav taws xob feem ntau siv rau hauv cov ntawv siv hluav taws xob tsawg, xws li LDOs yuav tsum tau ua kom tau raws li qhov sib txawv voltage.Cov zis hluav taws xob tswj tus nqi thiab ripple yog qhov zoo dua, qhov ua tau zoo yog qis dua, qhov xav tau ntawm cov khoom siv peripheral tsawg dua, thiab tus nqi qis.Lub Circuit Court yog qhov yooj yim.
Hais txog Khoom
Lub LMR14030 yog 40 V, 3.5 Ib kauj ruam nqes regulator nrog ib qho kev sib koom ua ke siab-sab MOSFET.Nrog rau ntau qhov kev tawm tswv yim los ntawm 4 V txog 40 V, nws tsim nyog rau ntau yam kev siv los ntawm kev lag luam mus rau tsheb rau lub zog txias los ntawm qhov chaw tsis muaj kev tswj hwm.Lub regulator lub quiescent tam sim no yog 40 µA nyob rau hauv pw tsaug zog hom, uas yog haum rau roj teeb powered systems.Ib qho ultra-low 1 µA tam sim no hauv hom kaw tuaj yeem ua rau lub roj teeb ntev dua.Ib tug dav adjustable switching zaus ntau tso cai rau tej efficiency los yog sab nraud tivthaiv loj kom optimized.Internal voj them nyiaj txhais tau hais tias tus neeg siv yog dawb los ntawm tedious ua hauj lwm ntawm lub voj kev them nyiaj tsim.Qhov no kuj txo qis cov khoom siv sab nraud ntawm lub cuab yeej.Lub precision enable input tso cai rau yooj yim ntawm regulator tswj thiab system hwj chim sequencing.Cov cuab yeej tseem muaj cov yam ntxwv tiv thaiv xws li lub voj voog-los ntawm-lub voj voog tam sim no txwv, thermal sensing thiab kaw vim muaj hluav taws xob ntau dhau, thiab kev tiv thaiv kev tiv thaiv overvoltage.
