I-Low Dropout regulators (LDOs) ibalulekile kwizinto zombane zanamhlanje. Bagcina i-voltage engaguqukiyo kwizixhobo ezixineneyo ezifana neefowuni kunye neetafile. Izilawuli ze-Low Dropout ziphucula ukusebenza kwesekethe apho ukuchaneka kubalulekile. Banciphisa ukuveliswa kobushushu kwaye bandise ubomi bebhetri, babenze balungele izixhobo eziphathwayo. Imarike ye-Low Dropout kulindeleke ukuba ikhule ukusuka kwi-2.3 yeebhiliyoni zeedola ngo-2023 ukuya kwi-3.6 yeebhiliyoni zeedola ngowama-2032.
IItrakthi ezibalulekileyo
I-Low Dropout Regulators (i-LDOs) inika amandla azinzileyo, okubalulekileyo kwiigajethi ezifana neefowuni kunye neetafile.
ii-LDO gcina amandla kwaye wenze ubushushu obuncinci, iibhetri zokunceda zihlala ixesha elide.
Ukwazi imiba yokuyeka umbane; Umbane omncinci oyekayo uvumela izixhobo zisebenzise amandla ebhetri ngcono.
Ii-LDO zinciphisa ingxolo, zinika amandla acocekileyo kwizinto ezifana neenkqubo zesandi kunye neesekethe zerediyo.
Xa ukhetha i-LDO, jonga amandla ombane, ukuchaneka kwemveliso, kunye nomda wangoku ukuze ulingane nesixhobo sakho.
Ukuqonda i-Low Dropout Regulators
Ziziphi ii-LDO?
A umlawuli we-low-dropout (LDO) sisixhobo esigcina umbane uzinzile. Isebenza naxa igalelo lombane liphezulu kancinci kunesiphumo. Lo msantsa omncinci ubizwa ngokuba yi-voltage yokuyeka, eyona nto ibalulekileyo kwii-LDO. Ngokungafaniyo nabanye abalawuli, ii-LDO zithe cwaka, zizenza zilungele izinto zombane ezibuthathaka.
Cinga nge-LDO njengesixhobo esinika izixhobo zakho amandla acocekileyo. Isebenzisa i-voltage yereferensi, inkqubo yempendulo, kunye ne-transistor yokudlula ukulawula ukuphuma. Amandla ombane asezantsi ophumayo anceda ukonga amandla kwaye anciphise nobushushu. Oku kwenza ii-LDO zigqibelele kwiigajethi ezisebenza kwiibhetri okanye ezifuna amandla azolileyo.
Usetyenziso lwee-LDO
Eziphathekayo elektroniki
Ii-LDO zibalulekile kwizixhobo ezincinci ezifana neefowuni, iitafile, kunye neewotshi ezihlakaniphile. Ezi zixhobo zidinga ulawulo olululo lwamandla ukwenza iibhetri zihlale ixesha elide. Ii-LDO zichitha amandla amancinci kwaye zingena kakuhle kwiindawo ezincinci.
I-Analog kunye ne-RF Circuits
Ingxolo inokonakalisa i-analog kunye neesekethe zeRF. Ii-LDO zinika amandla engxolo ephantsi, zigcina iimpawu zicacile. Zisetyenziselwa izixhobo zomsindo kunye nezixhobo zokunxibelelana kwisandi esingcono kunye neempawu ezizinzileyo.
IiNkqubo zoShishino kunye neeMoto
Iifektri kunye neemoto zisebenzisa ii-LDO ukugcina amandla ombane azinzile. Kwimizi-mveliso, banika amandla abenzi boluvo kunye noomatshini bokuzenzela. Kwiimoto, zinceda ukulawula iinkqubo kunye neeyunithi zokuzonwabisa. Ii-LDO zisebenza kakuhle ngokutshintsha i-voltages yegalelo, izenza zibe luncedo kakhulu.
Isidingo sezisombululo zamandla ezingcono zonyusile ukusetyenziswa kwe-LDO. Ukuthembeka kunye nokuguquguquka kwabo kubenza babe ngundoqo kwizinto zombane zanamhlanje.
Zisebenza njani i-Low Dropout Regulators
Uyilo olusisiseko
Abalawuli be-low-drootout basebenzisa uyilo olulula ukubonelela amandla azinzileyo. Amalungu aphambili a into yokupasa, I iamplifier yemposiso, Kunye umbane wesalathiso. Inxalenye nganye inceda umlawuli ukuba asebenze ngokufanelekileyo.
Inqaku lokupasa: Le nxalenye, ihlala i-PMOS transistor, itshintsha i-voltage ephumayo ngokulawula okwangoku.
I-Error Amplifier: Ijonga umbane wengxelo ngokuchasene nombane wereferensi kwaye ixelele into yokudlula ukuba ihlengahlengise.
I-Voltage yeReferensi: Oku kunika indawo yokuqala ezinzileyo ukugcina imveliso izinzileyo.
I-Capacitors nayo isetyenziselwa ukunciphisa ingxolo kunye nokugcina isiphaluka sizinzile. Itheyibhile engezantsi ichaza la malungu:
ilungu | inkcazelo |
|---|---|
Inqaku lokupasa | I-PMOS transistor ehlengahlengisa amandla ombane. |
I-Error Amplifier | Uthelekisa amandla ombane wengxelo kunye nombane wereferensi ukukhokela into yokupasa. |
Isalathiso sombane | Inika amandla ombane azinzileyo olawulo. |
Ingxelo yeVoltage Divider | Yehlisa amandla ombane wokuphuma xa kuthelekiswa nombane wereferensi. |
Imveliso yeCapacitor | Iyanciphisa ingxolo kwaye izinzile isiphaluka ngexesha lokutshintsha komthwalo. |
Input Capacitor | Izihluzi ingxolo njenge capacitor ephumayo. |
Olu luyilo luyanceda abalawuli abasezantsi sebenza kakuhle kwizixhobo ezininzi.
Linear Regulation Principle
Izilawuli zokuyeka ukwehla zisebenzisa umgaqo womgca ukuze usebenze. I into yokupasa utshintsho ukuxhathisa ukugcina umbane wemveliso uzinzile. Oku kunciphisa inkcitho yamandla, okwenza ii-LDO zibe nkulu kwizixhobo ezibuthathaka. I-voltage yokuyeka, okanye umahluko phakathi kwe-input and output voltage, incinci kakhulu-ngokuqhelekileyo i-100 ukuya kwi-200 mV. Lo mbane omncinci wokuyeka umbane wenza ii-LDO zahluke kwabanye abalawuli.
Imigaqo yokuSebenza
Ukugcina i-Voltage ephumayo izinzileyo
I-low-dropout regulator igcina i-voltage ephumayo izinzileyo, nokuba igalelo lombane liyatshintsha. I iamplifier yemposiso ujonga umbane wengxelo kwaye uyithelekise kumbane wereferensi. Ukuba imveliso iyatshintsha, into yokupasa ilungisa langoku ukuyilungisa. Oku kuqinisekisa ukuba izixhobo zakho zifumana amandla acocekileyo, azinzileyo.
Ukubaluleka kweNgxelo
Impendulo ngundoqo kwindlela umlawuli we-low dropout esebenza ngayo. I-voltage ye-feedback divider yehlisa i-voltage ephumayo ukuze ifaniswe nombane wereferensi. Oku kuvumela iamplifier yempazamo ifumane kwaye ilungise naluphi na utshintsho. Ngaphandle kwempendulo, umlawuli akayi kuhlala ezinzile, ngakumbi ngokutshintsha imithwalo.
Itheyibhile engezantsi ibonisa indlela ezisebenza ngayo ii-LDO:
Icandelo/Umba | inkcazelo |
|---|---|
Uyilo olusisiseko | Ii-LDO zine-voltage yereferensi, i-amplifier yempendulo, kunye ne-transistor yokupasa. |
UMgaqo wokuSebenza | I-amplifier yempazamo ilungisa i-transistor yokudlula ukugcina i-voltage ephumayo iqinile. |
Ukuyeka umbane | Umahluko omncinci phakathi kwegalelo kunye nemveliso yombane, ngokuqhelekileyo i-100 ukuya kwi-200 mV. |
Ngokufunda ezi ngcamango, unokubona indlela abalawuli abasezantsi abanikezela ngayo amandla athembekileyo kunye asebenzayo.
Ubuchule kwi-Low Dropout Regulators
Ukuyeka umbane
Intsingiselo Yayo nesizathu Sokuba Ibalulekile
Umbane wokuyeka umbane ngowona msantsa umncinci phakathi kombane wegalelo kunye nemveliso efunekayo ukuze isilawuli sokuyeka isikolo sisebenze kakuhle. I-voltage encinci yokuyeka inceda umlawuli ukuba agcine imveliso iqinile, nokuba igalelo lombane lisondele kwimveliso. Oku kubaluleke kakhulu kwizixhobo ezisebenzisa iibhetri. Ikuvumela ukuba usebenzise ibhetri eninzi phambi kokuba isilawuli siyeke ukusebenza. Izixhobo ezinombane osezantsi wokuyeka zikwahlala zipholile, zizenza zisebenze ngakumbi.
Ukuthelekisa amatyala aphantsi kunye naphezulu wokuyeka
Kwimeko ephantsi yokuyeka, ukuba isixhobo sakho sifuna i-3.3V kwaye igalelo yi-3.5V, umlawuli usenako ukunika imveliso ezinzileyo. Kodwa kwimeko ephezulu yokuyeka, igalelo linokufuneka libe yi-5V okanye ngaphezulu ukuze ufumane imveliso efanayo. Oku kubonisa ukuba kutheni i-voltage ephantsi yokuyeka ibalulekile ukugcina amandla kunye nokuphucula ukusebenza kakuhle.
Quiescent yangoku
Indlela Echaphazela Ubomi Bebhetri
Umsinga opholileyo sisixa esincinci samandla esisetyenziswa ngumlawuli xa isixhobo singasebenzi. Izilawuli ezisezantsi zokuyeka isikolo zenziwa ukuba zisebenzise ngaphantsi kweli langoku, nto leyo inceda ukuba iibhetri zihlale ixesha elide. Ngokuthoba i-current current, izixhobo zinokubaleka ixesha elide ngaphandle kokuphulukana nokusebenza.
Izilawuli ezisezantsi zokuyeka isikolo zonga amandla xa izixhobo zingasebenzi.
Banceda ukuba iibhetri zihlale ixesha elide kwizixhobo eziphathwayo.
Ukuthomalalisa okusezantsi kakhulu kugcina izixhobo zisebenza ngaphandle kokulimaza ukusebenza.
Ukulinganisa amandla aphantsi kunye nokuSebenza
Ukwehlisa umsinga opholileyo kunorhwebo. Inceda ubomi bebhetri kodwa inokwenza kube nzima kumlawuli ukuphatha utshintsho olukhawulezayo kwiimfuno zamandla. Kufuneka ulungelelanise olu rhwebo lusekwe kwinto efunwa sisixhobo sakho ukuze ufumane iziphumo ezingcono.
Ulawulo lweThermal
Ukulawula ubushushu kwiZixhobo eziPhezulu zaMandla
Kwizixhobo ezisebenzisa amandla amaninzi, ukulawula ukushisa kubaluleke kakhulu. Abalawuli kufuneka baphathe ubushushu kakuhle ukuze baphephe umonakalo kwaye basebenze ngokuthembekileyo. Indlela ibhodi yesekethe eyilwe ngayo kunye nokuba lungakanani ubhedu olusetyenziswayo kunokuchaphazela indlela ubushushu obulawulwa ngayo.
I-Copper coverage | Impembelelo kuLawulo loBubushushu | |
|---|---|---|
Uyilo 1 | low | Phakathi |
Uyilo 2 | phakathi | phezulu |
Uyilo 3 | phezulu | Phezulu kakhulu |
Unokujonga ukuba umlawuli uphatha kakuhle kangakanani ubushushu ngokulinganisa ubushushu besiphambuka kunye nokusebenzisa ifomula:Zth = (Tj - Ta) / P, apho i-Tj ibubushushu besiphambuka, iTa bubushushu bomoya, kunye no-P ngamandla asetyenziswayo.
Kutheni Ukuvalwa kweThermal kubalulekile
Iimpawu zokuvala i-Thermal cima isilawuli ukuba sishushu kakhulu. Oku kugcina isixhobo sikhuselekile kwaye kuthintela umonakalo. Ezinye iindlela, ezifana nokuqalisa okuthambileyo kunye nokulawula xa umlawuli evula okanye ecima, kunokunceda ukulawula ubushushu ngcono.
Iimpawu eziPhucula ukuSebenza okuPhantsi kokuyeka ukuyeka
Ukunciphisa ingxolo
Kutheni le nto ibalulekile kwi-Analog kunye nezixhobo zeRF
Ingxolo inokonakalisa i-analog kunye neesekethe zeRF, ezibangela ukusebenza kakubi. Izilawuli ezisezantsi zokuyeka isikolo zinika amandla acocekileyo, abaluleke kakhulu kolu setyenziso. Umlinganiselo wokwaliwa kombane ophezulu (PSRR) uvimba ingxolo yokungena ekufikeleleni kwimveliso. Oku kugcina iimpawu zicacile kwizixhobo ezifana neenkqubo zomsindo kunye nezixhobo zonxibelelwano.
Iindlela zokuthoba ingxolo
Ukunciphisa ingxolo, gxininisa kwizinto zangaphakathi nangaphandle. Ukukhetha ii-capacitors ezifanelekileyo kunye uyila uyilo olulungileyo lwePCB zingundoqo. Ii-ESR capacitors ezisezantsi zinceda ingxolo yokucoca ngcono. Kwakhona, ukwazi ukuziphatha kwengxolo yomlawuli wakho kunye nokuvavanywa ngokuchanekileyo kuthintela iziphumo ezingalunganga. La manyathelo anceda ii-LDO zisebenze kakuhle kwiindawo ezinengxolo.
Ukulawula Utshintsho Lomthwalo
Ukujongana neeMfuno zaMandla ngesiquphe
Utshintsho olukhawulezileyo kwimfuno yombane lunokwenza amandla ombane angazinzi. Inkqubo yempendulo kwi-LDO inceda ukugcina izinto zizinzile. Ukubekwa ngokufanelekileyo kwezibonda kunye ne-zero kwi-loop yempendulo kuqinisekisa ukuphendula ngokukhawuleza kwiinguqu zomthwalo. Oku kubalulekile kwizixhobo ezineemfuno zokutshintsha kwamandla.
Ukugcina uzinzo
Ukuzinza kuxhomekeke kwi-capacitor ephumayo kunye ne-ESR yayo. Ukukhetha umxube ochanekileyo wala malungu kunceda ukusingatha utshintsho lomthwalo wequbuliso. Inkqubo efanelekileyo yempendulo igcina umbane uzinzile, nangona iimeko zitshintsha. Oku kwenza ii-LDO zixhomekeke kusetyenziso oluninzi.
Iimpawu zoKhuseleko
Ukukhusela kwi-Overcurrent kunye nobushushu
Ukukhuselwa kwe-Overcurrent kumisa umbane omninzi ekonakaliseni umlawuli okanye izixhobo. Ukuvalwa kwe-Thermal kucima isilawuli ukuba sishushu kakhulu. Ezi mpawu zigcina izixhobo zikhuselekile kwaye zisebenza ixesha elide. Umzekelo, i-TPS7A24 ibonisa indlela ukuvalwa kwe-thermal kukhulisa ukuthembeka.
Ukuvala uReverse yangoku
Ukubuyela umva ukukhuselwa kwangoku kumisa i-current ukuba ibuyele ngasemva kwi-regulator. Oku kunokusindisa isiphaluka kumonakalo. Iluncedo ngakumbi kwizixhobo ezisebenza ngebhetri ngexesha lokutshaja. Ngeli nqaku, ii-LDO zihlala zikhuselekile kwaye zisebenza ngokufanelekileyo.
IiNgcaciso eziPhambili ze-Low Dropout Regulators
Uluhlu lweVoltage yokufaka
Ukutshatisa iMithombo yaMandla
Uluhlu lwe-voltage yegalelo lubonisa awona mandla aphantsi kwaye aphezulu i-LDO inokusingatha. Oku kuyinceda isebenze ngemithombo eyahlukeneyo yamandla njengeebhetri okanye iziguquli zeDC/DC. Ukuze i-LDO isebenze, i-voltage yegalelo kufuneka ibe phezulu kune-voltage yokuyeka kunye ne-voltage ephumayo. Ngokomzekelo, ukuba i-voltage yokuyeka yi-150 mV kwaye imveliso yi-2.8 V, igalelo lombane kufuneka libe yi-2.95 V.
Uninzi lwee-LDO zixhasa uluhlu olubanzi lwamandla ombane, zibenza babe luncedo kwizixhobo ezininzi. Ngalo lonke ixesha ujonge i-voltage encinci yegalelo ukuqinisekisa ukuba i-LDO isebenza ngokufanelekileyo. Oku kubaluleke ngakumbi kwizixhobo ezisebenza ngebhetri, njengoko amandla ombane ebhetri ehla xa ephuma.
Izinto omele uzikhumbule malunga noluhlu lwamandla ombane:
Umbane wegalelo kufuneka ube phezulu kunombane oyekayo kunye nophumayo.
Jonga ukuba iyahambelana nomthombo wakho wamandla ukunqanda iingxaki.
Khetha ii-LDO ezinoluhlu olubanzi kwiinketho ezininzi zoyilo.
Ukuchaneka kwe-Voltage Output
Kutheni Kubalulekile Kwizixhobo Ezinovakalelo
Ukuchaneka kombane ophumayo kubaluleke kakhulu kwizinto zombane ezibuthathaka. Iqinisekisa i-LDO inika i-voltage ezinzileyo kunye nechanekileyo, igcina iisekethe zithembekile. Kwizicelo ezichanekileyo ezifana neetyhubhu ze-photomultiplier okanye ukwenza i-chip, ukuchaneka kunokusuka kwi-0.02% ukuya kwi-0.0001%. La manqanaba angqongqo anciphisa ingxolo kunye ne-ripple, enceda izixhobo ukuba zisebenze kakuhle.
isicelo | Ukuchaneka kombane | Umgca / ukuLawulwa koMthwalo | I-Ripple / Ingxolo |
|---|---|---|---|
Imibhobho yeFotomultiplier (PMT) | Ifuna ukuchaneka okuphezulu | 0.02% - 0.0001% | 0.0005% / 5ppm |
Imveliso yeSemiconductor | Ifuna ukuchaneka okuphezulu | 0.02% - 0.0001% | 0.0005% / 5ppm |
Ubonelelo lwaMandla olunenjongo ngokubanzi | +/- 2% ukuya ku-0.5% | I-10% yomthwalo kwimveliso epheleleyo | I-1% ngaphakathi kwe-20MHz |
Ukuhlangabezana nale migangatho yokuchaneka, ii-LDO zisebenzisa iireferensi zombane ezichanekileyo kunye nezichasi ezikumgangatho ophezulu. Ezi ndawo zigcina i-voltage ephumayo iqinile, nangona umthwalo uguquka.
Ubungakanani bokwala ukuNikezelwa koMbane (PSRR)
Iyintoni na kwaye kutheni ibalulekile
Umlinganiselo wokulahlwa konikezelo lwamandla (PSRR) ubonisa indlela i-LDO evimba ngayo ingxolo yombane wegalelo kunye ne-ripple. I-PSRR ephezulu igcina i-voltage ephumayo icocekile, nokuba inamandla okufaka ingxolo. Oku kubalulekile kwiisekethe ze-analog ezinovakalelo, apho ingxolo inokonakalisa umgangatho womqondiso.
umba | inkcazelo |
|---|---|
Ukwala ukubonelelwa ngombane (PSR) | I-PSR ilinganisa ukuba i-LDO ivalela kakuhle kangakanani na igalelo kwi-ripple frequency. |
AmaBhendi aQhelekileyo | I-PSR ilinganiswa kwiindidi ezimbini: i-Band 1 (ii-frequencies eziphantsi) kunye ne-Band 2 (ii-frequencies eziphezulu). |
Isakhono sokuPhuma | Ukusebenzisa i-capacitors yexabiso eliphezulu kuphucula i-PSR kwiindidi eziphezulu ze-frequency. |
Ubeko lwePCB | Uyilo olulungileyo lwePCB lunciphisa ukuvuza kwengxolo ukusuka kwigalelo ukuya kwimveliso. |
Ukuphucula i-PSRR, gxininisa uyilo oluhle lwePCB kwaye usebenzise i-capacitors nge-capacitance ephezulu. Ii-LDO ze-PSRR eziphezulu zilungile ekuhluzeni ingxolo evela kubaguquli be-DC/DC, enika iziphumo ezizinzileyo nezicocekileyo zezixhobo zakho.
Ingcebiso: I-PSRR iphucula kwimithwalo ekhanyayo ngenxa ye-impedance ephezulu yokuphuma. Kodwa kwimithwalo enzima, i-PSRR inokuhla, ke khetha i-LDO ngokusekwe kwiimfuno zamandla zesixhobo sakho.
Isiphumo sangoku siphezulu
Ukutshatisa Umthamo woMlawuli kwiiMfuno zeDivaysi
Xa ukhetha isilawuli se-low-dropout (LDO), qiniseka ukuba imveliso yangoku ephezulu ihambelana neemfuno zesixhobo sakho. Ubuninzi bemveliso yangoku yeyona yangoku i-LDO inokunika ngelixa igcina i-voltage iqinile. Ukuba ifowuni yakho idinga umsinga ongaphezulu kunoko i-LDO inokuphatha, umbane unokuhla, kwaye isixhobo sinokuyeka ukusebenza.
Ukukhetha i-LDO efanelekileyo, fumana eyona nto iphezulu yangoku eza kusetyenziselwa isixhobo sakho. Umzekelo, ukuba isekethe yakho isebenzisa i-500 mA ngokwesiqhelo kodwa inyuke iye kuthi ga kwi-700 mA phantsi kokusetyenziswa kakhulu, khetha i-LDO enokubonelela nge-700 mA ubuncinane.
Icebiso: Khetha i-LDO enomda wangoku ophezulu kancinci kunencopho yemfuno yakho. Oku kunceda ukujongana nokunyuka ngokukhawuleza kunye nokugcina ukusebenza kakuhle.
Nalu uthelekiso olulula lwee-LDO ezinemida eyahlukileyo yangoku:
Umzekelo we-LDO | Isiphumo sangoku siphezulu | Eyona ndlela isebenzayo |
|---|---|---|
I-LDO-A | 150 mA | Izinzwa ezincinci, iitshiphusi ezinamandla aphantsi |
I-LDO-B | 500 mA | Izixhobo eziphathekayo, izixhobo zomsindo |
I-LDO-C | 1 A | Iimotor, izibane zamandla aphezulu |
Kwakhona, cinga malunga nendlela i-LDO ephatha ngayo ukushisa. Imisinga ephezulu idala ubushushu obuninzi, obunokunciphisa ukusebenza kakuhle kwaye bufutshane ubomi bayo. Jonga ii-LDO ngokhuseleko lwe-thermal ukuphepha ukutshisa.
Ngokuthelekisa umthamo we-LDO kwisixhobo sakho, usigcina sisebenza kakuhle kwaye usikhusele kubungozi. Eli nyathelo lingundoqo ekwakheni iinkqubo ezithembekileyo nezisebenzayo.
Izilawuli zokuyeka isikolo ezisezantsi zibalulekile kwizinto zombane zanamhlanje. Bagcina amandla ombane engaguquki, banciphisa ingxolo, kwaye bancedisa iibhetri ixesha elide. Oku kubenza babaluleke kwizixhobo eziethe-ethe.
Isifundo se-1: Izixhobo zonyango eziphathekayo zisebenze ixesha elide kwaye zithembeke ngakumbi nge-NCP4681DSQ25T1G.
Isifundo se-2: Iinkqubo zefektri zisebenzise amandla amancinci kunye namandla alawulwayo ngcono nge-NCP4681DSQ33T1G.
Ii-LDO zilungile kwiinkqubo ezizolileyo, kunye ne-PSRR egqwesileyo kunye nolawulo lwengxolo. I-voltage yabo encinci yokuyeka kunye ne-low quiescent yangoku ephantsi ihambelana nezixhobo eziphathekayo kunye nezixhobo ezingenazingcingo kakuhle.
Jonga izikhokelo ezineenkcukacha ukuze ufunde ngakumbi malunga noyilo lwe-LDO kunye nokusetyenziswa.
FAQ
Yintoni eyenza ii-LDO zodwa xa zithelekiswa nabanye abalawuli bamandla ombane?
Ii-LDO zidinga kuphela umsantsa omncinci phakathi kombane ongenisayo kunye nemveliso, obizwa ngokuba yi-droutout voltage. Oku kuzenza zibengcono kwizixhobo ezisebenzisa iibhetri. Ngokungafaniyo nabalawuli abatshintshayo, ii-LDO zinika amandla agudileyo, azolileyo, alungele izinto zombane ezibuthathaka njengeesekethe ze-analog.
Ndingayikhetha njani i-LDO elungileyo kwisixhobo sam?
Jonga kuluhlu lwegalelo lombane, ukuchaneka kombane wokuphuma, kunye nobuninzi bemveliso yangoku. Tshatisa ezi zinto neemfuno zesixhobo sakho. Kwakhona, khangela iimpawu ezifana nokulawula ingxolo kunye nokukhusela ubushushu ukuphucula ukhuseleko kunye nokusebenza.
Ngaba ii-LDO zinganceda iibhetri zihlale ixesha elide?
Ewe, ii-LDO zonga amandla ngokusebenzisa umsinga othe cwaka ophantsi. Oku kunceda izixhobo eziphathwayo zisebenze ixesha elide. Ukukhetha i-LDO enombane osezantsi wokuyeka nako kusebenzisa amandla ebhetri ngokufanelekileyo njengoko ikhupha.
Kutheni ulawulo lwengxolo lubalulekile kwii-LDO?
Ingxolo inokonakalisa iisekethe ezibuthathaka, ngakumbi kwi-analog kunye nezixhobo zeRF. Ii-LDO ezine-PSRR eziphezulu kunye nemveliso yengxolo ephantsi inika amandla acocekileyo. Oku kuphucula umgangatho wesandi kunye nokusebenza kwizinto ezifana nezixhobo zomsindo kunye nezixhobo zonxibelelwano.
Ngaba ii-LDO zilungile kwizixhobo zamandla aphezulu?
Ii-LDO zinokusebenza kwizixhobo ezinamandla aphezulu ukuba zilawula ubushushu kakuhle. Iimpawu ezifana nokupholisa kunye nokuvalwa kwe-thermal kuyeka ukutshisa kakhulu. Kodwa kwiimfuno zamandla aphezulu kakhulu, izilawuli zokutshintsha zinokusebenza ngcono.
Icebiso: Soloko ujonga ukuba i-LDO ibuphatha kakuhle kangakanani na ubushushu kunye nangoku phambi kokuba uyisebenzise kuseto lwamandla aphezulu.
