Yuav ua li cas kom ua tiav cov khoom lag luam portable lithium roj teeb

ଲେଖକ: ଆଇଫ୍ଲୋପାୱାର - Leverancier van draagbare energiecentrales

Abstract: Kab lus no siv cov piv txwv los piav qhia txog yuav ua li cas thiaj ua tau cov khoom siv roj teeb. Cov lus tseem ceeb: cov khoom lag luam portable; linear regulator; buck-boost converter; roj teeb nyob rau hauv ntau yam khoom siv portable xws li xov tooj ntawm tes, xov tooj ntse, digital media player, lossis cov koob yees duab digital kev txhim kho. Qhov no feem ntau yog siv los ntawm kev siv qee qhov kev ua haujlwm ntau dua thiab ntau dua analog circuits, tab sis qhov tshwm sim yog siab dua lub zog siv ntawm daim ntawv thov circuit.

Los ntawm lub peev xwm roj teeb tshiab tuaj yeem ua tau raws li qhov xav tau ntawm kev siv hluav taws xob ntau ntxiv, tab sis qhov no yuav tsum yog lub roj teeb muaj peev xwm loj dua lossis txhim kho roj teeb thev naus laus zis. Feem ntau, tib neeg yuav tsis xaiv qhov loj ntawm lub roj teeb vim hais tias lub casing sab nraud yog txwv. Txij li thaum kev nce qib ntawm cov roj teeb thev naus laus zis thiab kev tsim cov thev naus laus zis tshiab tsis ua tau raws li qhov xav tau ntawm lub zog loj ntawm tib theem, kev tswj xyuas hluav taws xob ntau dua yuav tsum ua kom siab dua.

Tib lub sijhawm, qhov kev thov rau cov kev daws teeb meem me ua rau qhov kev sib tw no nyuaj dua. Yav dhau los, txhawm rau kom tau txais cov kev xav tau, tsuas yog siv ob peb kab regulators. Cov regulators no txuas ncaj qha mus rau lub roj teeb los qhia qhov yuav tsum tau muaj qhov system voltage rail.

Ntau chav tswj fais fab siv hauv cov khoom siv nqa tau tsuas yog siv qee qhov kev tswj hwm los tswj kev siv hluav taws xob. Cov cuab yeej siv roj teeb uas tau siv yog 3 NICD lossis NIMH roj teeb pob. Tib lub sijhawm, cov khoom siv tshuaj lom neeg no tau yuav luag tag nrho los ntawm ib lub roj teeb lithium ion vim tias cov roj teeb lithium-ion no muaj kev ua tau zoo dua.

Nrog rau ntau daim ntawv thov nce mus rau qhov kev thov tam sim no, qee qhov kev tswj hwm cov kab hluav taws xob tau hloov pauv los ntawm cov nqi kim dua tab sis muaj txiaj ntsig zoo dua qub. Qee lub hwj chim rails xws li processor kernels thiab I / O feem ntau zoo li no. Txij li cov linear regulator thiab puck converter tuaj yeem kho qhov tso zis hluav taws xob nkaus xwb thaum nws cov input voltage siab dua, yog tias lub roj teeb hluav taws xob qis qis rau qhov programmed tso zis voltage, ces lub kaw lus kaw.

Qhov tsawg kawg nkaus siab poob ntawm cov kab hluav taws xob regulator lossis lub siab poob qis ntawm qhov inductance thiab hloov yuav tsum tau ntxiv rau qhov tso zis hluav taws xob. Yog li ntawd, muaj ib tug raug 3.3V voltage rail los ntawm ib tug lithium-ion roj teeb, thiab ib tug raug roj teeb voltage ntawm lub system yog 3.

4V. Cov hluav taws xob ntxiv uas tshwm sim thaum muab faib rau 3.0V yuav tsis siv rau qhov no.

Kev ntsuas qhia tau hais tias lub zog ntxiv hauv cov roj teeb lithium ion tam sim no yog li 10%. Qhov ntawd yog hais tias, txhua lub zog tswj kev daws teeb meem uas tuaj yeem siv cov hluav taws xob ntxiv no yuav tsum muaj peev xwm rho tawm 10% kev ua haujlwm tom qab siab dua li cov phaw converter daws teeb meem. Hauv lwm lo lus, lwm txoj kev daws teeb meem uas siv 97% qhov nruab nrab ntawm kev siv lub tshuab hloov pauv yuav tsum tau ua haujlwm tsawg kawg yog ib qho ntau dua 87% kev ua haujlwm nruab nrab kom ntev lub sijhawm khiav ntawm lub roj teeb.

Qhov no yog ib qho kev sib tw loj heev rau ntau cov nyiaj npib-txhim kho converter daws teeb meem. Kev ua haujlwm dav dav ntawm SEPIC lossis rov qab kev daws teeb meem rau kev daws teeb meem kev lag luam 85% siab tshaj plaws. Txhawm rau kom tau txais qhov kev ua tau zoo no, nws tau txiav txim siab ib txoj hauv kev siv ntau yam kev txhim kho kev ua haujlwm zoo, xws li synchronous rectification, thiab qhov loj ntawm qhov kev daws teeb meem no loj dua li cov phaw converter.

4 Hloov Bucking - Boot Conversion Ib txwm muaj ob lub keyboards ib txhij hloov, hauv kev daws teeb meem zoo heev, siv cov phaw hloov pauv no yuav muaj qhov ua tau zoo tib yam (85%). Yog li ntawd, los ntawm qhov kev pom no, siv lub phaw-boost converter tsis ua haujlwm, thiab nws kuj yog vim li no uas tib neeg tsis tau xav txog kev siv lub tshuab hloov pauv nyiaj no. Txawm li cas los xij, muaj qee qhov kev sib tw.

Piv txwv li, cov xov tooj ntawm tes siv cov pulses siab tam sim no thaum xa cov ntaub ntawv los tsav lawv RF-PA. Cov mem tes tam sim no tuaj yeem tau ncaj qha los ntawm lub roj teeb, uas tuaj yeem ua rau lub zog poob ntxiv ntawm lub roj teeb impedance thiab lub roj teeb txuas. Vim yog cov khoom siv hluav taws xob tsawg, qhov no yuav ua rau lub kaw lus hluav taws xob saib xyuas kom kaw lub kaw lus thaum muaj cov mem tes tam sim no.

Cov ntawv thov LED raws li LEDs hauv koj lub xov tooj, lossis pib koj lub hard drive hauv koj daim ntawv thov media player, koj yuav muaj kev cuam tshuam zoo sib xws ntawm lub roj teeb. Vim muaj kev laus los yog kub tsis tshua muaj tshwm sim hauv qhov tshiab ntawm cov roj teeb impedance ua rau cov teeb meem no hnyav dua. Nyob rau hauv cov ntaub ntawv no, lub phaw-boost converter yuav siv tau los daws qhov voltage poob ntawm qhov tseem ceeb system voltage rail.

Qhov no ua rau lub kaw lus khiav ruaj khov thiab txhim khu kev qha, thiab cov roj teeb hluav taws xob qis dua kuj tau tso cai. Tsis tas li ntawd, lub roj teeb kuj tseem txhim kho. Feem ntau, lub peev xwm roj teeb tshiab yuav nrog rau kev siv ntau yam ntawm cov zis voltages.

Piv txwv li, nrog rau yav tom ntej lithium ion roj teeb thev naus laus zis, lub roj teeb tuaj yeem them mus txog 4.5 V, thiab tuaj yeem tso tawm qis li 2.3V.

Siv qhov nruab nrab voltage 3.4V, uas tuaj yeem ua rau lub roj teeb muaj peev xwm nyob hauv lub xeev tsis siv. Kuj tseem muaj roj teeb thev naus laus zis uas nyob rau theem kev txhim kho, yuav ua haujlwm zoo hauv qab 3.

4V (piv txwv li, Li-s). Nyob rau hauv cov ntaub ntawv no, nws yuav twv yuav raug hu nqis nqis - boost conversion. Ib txoj hauv kev yooj yim los daws qhov teeb meem no yog tsim kom muaj lub zog hluav taws xob ntau dua (e.

g., 5V) uas tuaj yeem siv los tsim tag nrho cov kab hluav taws xob hluav taws xob, uas siab tshaj qhov txiav tawm hluav taws xob ntawm lub roj teeb. Qhov kev ua haujlwm no tuaj yeem ua tiav los ntawm kev siv lub tshuab ua kom muaj txiaj ntsig loj dua thiab cascading converter.

Tag nrho lub zog hloov pauv tau yooj yim tuaj yeem ncav cuag ntau dua 90%. Hmoov tsis zoo, ntau lub zog hloov pauv xav tau ntau qhov chaw, thiab feem ntau tsis muaj qhov chaw zoo li no hauv cov khoom siv txawb nqa tau. Lwm qhov kev xaiv yog siv lub phaw-boost converter los tsim kom muaj qhov system voltage rail ncaj qha los ntawm lub roj teeb.

Raws li tau hais los saum no, kev hloov pauv hluav taws xob zoo yog qhov tseem ceeb hauv kev tsim kom muaj kev sib tw fais fab kev tswj kev daws teeb meem. Lwm qhov tseem ceeb yog qhov loj ntawm cov tshuaj. Xav txog qhov no, cov kauj ruam-down-boosting hloov kev daws teeb meem raws li Sepic lossis thim rov qab topology tsis haum vim tias nws yog cov khoom loj dua ntim tsis muaj zog, thiab feem ntau tsis tshua muaj txiaj ntsig.

Ib qho kev daws teeb meem uas siv 4 lub keyboards muaj peev xwm loj tshaj plaws kom ua tau raws li cov cai no. Txawm li cas los xij, hauv txoj kev tsav tsheb yooj yim, muaj ob lub keyboards txhua lub sijhawm hauv kev ua haujlwm tib lub sijhawm, tab sis siv cov kev daws teeb meem no tsis yog kev txi zoo xwb, tab sis kuj tseem txhim kho cov kev xav tau ntawm inductance thiab hloov loj, vim tias muaj ntws los ntawm cov khoom no ntau dua RMS tam sim no. Tsuas yog sab ntawm cov keyboards no tsuas yog tsav, uas txhais tau hais tias ib txwm khiav lub cuab yeej nrog lub kauj ruam-down lossis txhawb kev hloov pauv kom ua tiav qhov ua tau zoo tshaj plaws, thiab qis RSM tam sim no tseem coj cov tshuaj me me.

Nyob rau hauv tas li ntawd, lub phaw thiab boosting conversion muaj lub siab tshaj plaws efficiency ua hauj lwm taw tes nyob rau hauv ob topologies. Qhov no yog qhia nyob rau hauv kev sib raug zoo piv txwv ntawm kev ua tau zoo thiab boost (TPS61020) thiab phaw (TPS62046) converter input voltage nkhaus qhia qhov no. .