Thaum nkag siab txog cov capacitors, ib qho ntawm qhov tseem ceeb uas yuav tsum tau xav txog yog ESR (sib npaug series tsis kam). ESR yog tus yam ntxwv ntawm txhua tus capacitors thiab ua lub luag haujlwm tseem ceeb hauv kev txiav txim siab lawv qhov kev ua tau zoo tag nrho. Hauv tsab xov xwm no, peb yuav tshawb txog kev sib raug zoo ntawm ESR thiab capacitors, tsom tshwj xeeb rauqis-ESR MLCCs(Multilayer ceramic capacitor).
ESR tuaj yeem txhais tau tias yog qhov kev tawm tsam uas tshwm sim hauv koob nrog lub peev xwm ntawm lub capacitor vim yog tus cwj pwm tsis zoo ntawm cov ntsiab lus capacitor. Nws tuaj yeem xav tias yog qhov kev tiv thaiv uas txwv qhov ntws ntawm tam sim no los ntawm lub capacitor. ESR yog cov yam ntxwv tsis txaus ntseeg vim tias nws ua rau lub zog kom tawg raws li cov cua sov, yog li txo cov kev ua haujlwm ntawm lub capacitor thiab cuam tshuam rau nws cov kev ua haujlwm.
Yog li, ESR cuam tshuam dab tsi rau cov capacitors? Cia peb khawb rau hauv cov ntsiab lus.
1. Fais fab dissipation: Thaum tam sim no ntws los ntawm lub capacitor, lub zog poob rau hauv daim ntawv ntawm cov cua sov vim yog qhov tsis kam muab los ntawm ESR. Qhov hluav taws xob dissipation no tuaj yeem ua rau kub nce, uas tuaj yeem cuam tshuam rau tag nrho kev ua haujlwm thiab kev pabcuam lub neej ntawm lub capacitor. Yog li ntawd, kev txo qis ESR yog qhov tseem ceeb los txo cov hluav taws xob poob thiab ua kom muaj kev ua haujlwm zoo ntawm lub capacitor.
2. Voltage Ripple: Nyob rau hauv daim ntawv thov uas capacitors siv rau lim thiab smoothing lub hom phiaj, ESR ua ib qho tseem ceeb parameter. ESR ua rau qhov hluav taws xob ripples lossis hloov pauv thaum qhov hluav taws xob hla lub capacitor hloov sai. Cov ripples no tuaj yeem ua rau lub cev tsis muaj zog thiab tsis sib haum xeeb, cuam tshuam rau qhov zoo ntawm cov teeb liab tso zis. Tsawg ESR capacitors tshwj xeeb yog tsim los txo cov hluav taws xob ripples thiab muab cov kab hluav taws xob ruaj khov.
3. Kev hloov ceev: Cov capacitors feem ntau siv hauv cov hluav taws xob hluav taws xob uas cuam tshuam nrog kev hloov pauv ceev. ESR siab tuaj yeem ua rau qeeb qeeb ntawm lub voj voog hloov ceev, ua rau qeeb thiab txo qis kev ua haujlwm. Tsawg ESR capacitors, ntawm qhov tod tes, muab cov nqi them sai dua thiab tso tawm, ua rau lawv zoo tagnrho rau cov ntawv thov uas yuav tsum tau hloov ceev.
4. Cov lus teb zaus: ESR kuj tseem muaj feem cuam tshuam rau qhov zaus teb ntawm lub capacitor. Nws qhia txog impedance uas hloov nrog zaus. High ESR capacitors nthuav tawm impedance siab dua ntawm cov zaus ntau dua, txwv lawv cov kev ua tau zoo hauv cov ntawv thov uas xav tau ntau zaus. Tsawg ESR capacitors muaj qis impedance tshaj qhov dav zaus spectrum thiab tau ua pov thawj tias yuav ua tau zoo dua hauv qhov xwm txheej no.
Txhawm rau daws cov teeb meem tshwm sim los ntawm ESR siab,qis-ESR MLCCstau dhau los ua neeg nyiam nyob rau xyoo tas los no. Cov MLCCs no yog tsim los siv cov khoom siv siab heev thiab cov txheej txheem tsim khoom kom ua tiav cov txiaj ntsig ESR qis dua piv rau cov pa hluav taws xob. Lawv cov lus teb zoo dua, kev siv hluav taws xob qis dua thiab txhim kho kev ruaj ntseg ua rau lawv zoo tagnrho rau ntau yam kev siv xws li cov khoom siv fais fab, lim circuits, decoupling thiab bypass.
Hauv cov ntsiab lus, ESR yog qhov tseem ceeb uas cuam tshuam rau kev ua haujlwm ntawm lub capacitor. Nws txiav txim siab lub capacitor lub zog dissipation, voltage ripple, hloov ceev, thiab zaus teb. Tsawg ESR MLCCs tau tshwm sim los ua ib qho kev daws teeb meem los txo cov teeb meem cuam tshuam nrog ESR siab, muab kev ua haujlwm zoo thiab txhim khu kev qha ntawm ntau yam khoom siv hluav taws xob thiab circuits.
Post lub sij hawm: Sep-27-2023