Switching vs Linear Power Supplies: Yam twg los xaiv?

Thaum nws los txog rau kev xaiv cov khoom siv hluav taws xob, peb feem ntau pom peb tus kheej tawg ntawm Switching Power Supply thiab Linear Power Supply. Ob hom khoom siv hluav taws xob muaj lawv tus kheej zoo, ua rau lawv tsim nyog rau kev siv sib txawv. Kev nkag siab txog qhov sib txawv ntawm lawv yuav pab koj txiav txim siab paub ntau ntxiv thaum tsim koj lub zog.

Switching Power Supply yog dab tsi?
Switching Power Supply yog hom khoom siv hluav taws xob uas tswj cov zis hluav taws xob thiab tam sim no los ntawm kev hloov hluav taws xob sai sai (xws li transistors) rau thiab tawm. Nws ua haujlwm los ntawm kev hloov cov khoom siv hluav taws xob mus rau qhov xav tau tso zis hluav taws xob siv cov khoom siv hluav taws xob ntau zaus (xws li boost, phaw, lossis puck-boost converters). Hloov Cov Khoom Siv Hluav Taws Xob muaj txiaj ntsig zoo vim tias lawv hloov lub zog nrog qhov poob qis, ua rau lawv zoo tagnrho rau cov khoom siv uas xav tau cov qauv tsim qauv thiab kho qhov voltages.

Piv nrog rau cov khoom siv hluav taws xob ib txwm muaj, Hloov Cov Khoom Siv Hluav Taws Xob muaj ntau lub zog siv hluav taws xob, feem ntau ua tiav qib siab tshaj 80%, thaum Cov Khoom Siv Hluav Taws Xob Hluav Taws Xob tsis tshua muaj txiaj ntsig thiab tsim kom muaj cua sov ntau dua.

Dab tsi yog Linear Power Supply?
Linear Power Supply yog cov khoom siv hluav taws xob ib txwm siv uas tswj cov zis hluav taws xob los ntawm kev kho tam sim no. Nws ua haujlwm los ntawm kev kho qhov hluav taws xob ncaj qha thiab tswj cov dej ntws tam sim no los ntawm cov khoom siv hluav taws xob los yog cov peev txheej tam sim no kom ruaj khov cov zis hluav taws xob. Lub ntsiab kom zoo dua ntawm Linear Power Supplies yog lawv lub peev xwm los muab cov zis ruaj khov nrog cov suab nrov tsawg, ua rau lawv haum rau cov ntawv thov uas yuav tsum tau muaj zog huv si thiab ruaj khov.

Txawm li cas los xij, Linear Power Supplies zoo li tsis tshua muaj txiaj ntsig vim tias lub zog ntau dhau yog dissipated li cua sov. Piv txwv li, thaum nqis zog los ntawm 12V mus rau 5V, lub zog ntau dhau tau hloov mus rau hauv tshav kub es tsis yog siv tau zoo.

Qhov Sib txawv tseem ceeb ntawm kev hloov pauv thiab cov khoom siv hluav taws xob tawm
efficiency

Hloov Cov Khoom Siv Hluav Taws Xob muaj txiaj ntsig ntau dua li Cov Khoom Siv Hluav Taws Xob. Lawv siv cov txheej txheem hloov pauv ntau zaus los hloov lub zog kom muaj txiaj ntsig zoo nrog qhov poob qis, feem ntau ua tiav qib siab ntawm 80% lossis siab dua. Hauv qhov sib piv, Cov Khoom Siv Hluav Taws Xob Hluav Taws Xob hloov hluav taws xob ntau dhau mus rau hauv tshav kub, ua rau qis qis dua, feem ntau qis dua 50%.

Qhov loj thiab hnyav

Hloov Cov Khoom Siv Hluav Taws Xob feem ntau me me thiab sib zog dua li cov khoom siv hluav taws xob Linear vim tias lawv ua haujlwm ntawm ntau zaus thiab yuav tsum muaj cua sov tsawg dua. Lawv tsis xav tau cov heatsinks loj lossis cov khoom loj los tswj cov cua sov. Ntawm qhov tod tes, Linear Power Supplies loj dua thiab xav tau cov heatsinks loj dua los tswj cov cua sov uas tsim los ntawm lawv cov kev ua haujlwm qis dua.

Tawm suab nrov thiab ruaj khov

Linear Power Supplies ua tau zoo nyob rau hauv kev muab qhov ruaj khov thiab tsis muaj suab nrov tso zis voltage. Vim lawv cov qauv tsim yooj yim, lawv zoo tagnrho rau cov ntawv thov uas xav tau lub suab qis thiab ruaj khov, xws li cov khoom siv suab thiab cov cuab yeej precision.

Hloov Cov Khoom Siv Hluav Taws Xob, txawm li cas los xij, tuaj yeem tsim hluav taws xob cuam tshuam (EMI) thiab suab nrov vim lawv qhov kev hloov pauv ntau zaus. Txawm hais tias niaj hnub Hloov Cov Khoom Siv Hluav Taws Xob siv cov txheej txheem lim thiab tiv thaiv kom txo tau cov teeb meem no, lawv yuav tsis haum rau cov ntawv thov uas xav tau lub suab nrov qis.

nqi

Cov Khoom Siv Hluav Taws Xob Linear yuav muaj cov nqi pib qis dua vim lawv cov qauv tsim yooj yim dua. Txawm li cas los xij, lawv cov kev ua haujlwm qis dua thiab qhov loj dua txhais tau tias lawv yuav raug nqi ntau dua rau lub sijhawm ntev ntawm kev siv hluav taws xob thiab kev tswj kom sov.

Hloov Cov Khoom Siv Hluav Taws Xob feem ntau muaj kev nqis peev ntau dua vim lawv cov qauv tsim thiab kev tsim khoom ntau dua. Txawm li cas los xij, lawv cov kev ua haujlwm siab dua thiab kev siv hluav taws xob qis tuaj yeem ua rau txo qis tag nrho cov nqi hauv lub sijhawm ntev, tshwj xeeb tshaj yog rau kev siv hluav taws xob thiab kev siv tsis tu ncua.

daim ntawv sau npe

Hloov Cov Khoom Siv Hluav Taws Xob yog tsim rau kev ua haujlwm siab, kev siv hluav taws xob tsawg uas yuav tsum tau hloov kho qhov hluav taws xob tawm, xws li cov khoom siv hluav taws xob rau cov khoos phis tawj, LED teeb pom kev zoo, roj teeb chargers, thiab cov cuab yeej hluav taws xob. Lawv zoo haum rau cov khoom siv hluav taws xob siab thiab cov ntawv thov uas qhov loj me yog qhov tseem ceeb.

Cov Khoom Siv Hluav Taws Xob Linear yog qhov tsim nyog rau cov ntawv thov uas yuav tsum muaj qhov ruaj khov thiab tsis muaj suab nrov, xws li lub suab amplifiers, cov cuab yeej precision, thiab cov cuab yeej kho mob. Lawv yog cov zoo tagnrho rau cov xwm txheej uas qhov voltage zoo yog qhov tseem ceeb.

Kev xaiv ntawm Switching Power Supply thiab Linear Power Supply nyob ntawm seb koj xav tau daim ntawv thov tshwj xeeb. Yog tias koj xav tau lub zog ua haujlwm siab, kev cog lus, thiab hloov pauv hloov pauv hluav taws xob yog qhov kev xaiv zoo tshaj plaws, tshwj xeeb tshaj yog rau kev siv hluav taws xob siab thiab hloov pauv-voltage.

Txawm li cas los xij, yog tias koj xav tau lub zog hluav taws xob uas muab lub suab nrov qis thiab qhov muaj zog ruaj khov, Linear Power Supply yuav yog qhov kev xaiv zoo dua, tshwj xeeb tshaj yog rau cov ntawv thov hauv cov cuab yeej rhiab zoo li lub tshuab hluav taws xob thiab kev ntsuas qhov tseeb. Thaum Hloov Cov Khoom Siv Hluav Taws Xob muaj qhov zoo nyob rau hauv feem ntau, Linear Power Supplies tseem ua lub luag haujlwm tseem ceeb hauv qee cov ntawv tshwj xeeb.

Nkag siab txog qhov sib txawv ntawm ob hom khoom siv hluav taws xob thiab xaiv qhov tsim nyog raws li koj cov kev xav tau yuav ua kom koj cov cuab yeej tau txais kev txhawb zog zoo.