Axial tantalum capacitors, ib hom polarized capacitor nrog hlau tantalum ua nws cov tub ntxhais, muab lawv cov yam ntxwv ntawm kev sib sib zog nqus ntawm cov khoom siv, kev tsim qauv, thiab kev tswj cov txheej txheem. Qhov kev sib koom ua ke no ua rau lawv nthuav tawm cov txiaj ntsig zoo ntawm kev ua tau zoo thiab kev cia siab rau kev muaj peev xwm nyob rau hauv siab -kawg daim ntawv thov hluav taws xob. Cov yam ntxwv no tsis tsuas yog txiav txim siab lawv qhov tsim nyog raws li kev ua haujlwm nyuaj tab sis tseem muab cov qauv tsim hluav taws xob nrog cov kev daws teeb meem uas sib xyaw ua ke siab - lub zog ceev ceev thiab cov lus teb ruaj khov.
Ua ntej, lub siab dielectric tas li thiab ntim kom zoo dua yog ntawm nws cov yam ntxwv tseem ceeb. Axial tantalum capacitors siv siab -purity tantalum hmoov sintered los tsim lub cev ntxeem tau anode, thiab tom qab ntawd cov txheej txheem anodic oxidation yog siv los tsim tantalum pentoxide (Ta₂O₅) dielectric txheej ntawm nws qhov chaw. Ta₂O₅ muaj lub siab dielectric tas li (kwv yees li 27), deb tshaj li cov txhuas oxide dielectric ntawm cov tsoos txhuas electrolytic capacitors. Yog li ntawd, rau tib lub peev xwm yuav tsum tau, qhov ntim ntawm axial tantalum capacitors tuaj yeem txo qis, ua kom yooj yim rau kev tsim cov khoom siv hluav taws xob me me thiab lub teeb yuag.
Qhov thib ob, qis sib npaug series tsis kam (ESR) thiab qis sib npaug series inductance (ESL) muab nws zoo heev - tus yam ntxwv zaus. Ua tsaug rau cov txheej nyias nyias thiab tuab Ta₂O₅ dielectric txheej, thiab qhov zoo conductivity ntawm manganese dioxide (MnO₂) thiab graphite / silver paste hauv cov txheej txheem cathode, cov nqi poob thaum them thiab tawm yog tsawg heev. Cov yam ntxwv no tso cai rau axial tantalum capacitors kom tswj tau qhov qis ripple thiab zoo teeb liab kev ncaj ncees nyob rau hauv daim ntawv thov uas yuav tsum tau cov lus teb ceev thiab efficiency, xws li hloov fais fab mov filtering thiab RF module decoupling.
Thib peb, qhov kub ntau yam ruaj khov thiab kev ntseeg siab yog qhov tseem ceeb ntawm kev sib tw zoo ntawm axial tantalum capacitors. Tantalum hlau nws tus kheej muaj cov tshuaj inertness siab, thiab Ta₂O₅ dielectric txheej muaj qhov tshwj xeeb ntawm nws tus kheej - kho muaj peev xwm - thaum lub zog hluav taws xob hauv zos siab dhau, ua rau me me tawg, qhov tam sim no ntws los ntawm qhov tsis xws luag yuav rov ua dua - oxidize cov tantalum hlau ntawm qhov chaw tsis xws luag thiab tiv thaiv kev ua txhaum ntawm cov channel. Qhov no tus kheej - kho mechanism, ua ke nrog nruj ntim thiab sealing txheej txheem, tso cai rau cov khoom kom tswj tau me me capacitance sib txawv thiab ruaj khov xau tam sim no kev ua tau zoo ntawm qhov kub thiab txias ntawm -55℃mus rau 125℃los yog siab dua, ua rau nws tsim nyog rau kev thov ib puag ncig xws li aerospace, tub rog, kev kho mob, thiab kev tswj kev lag luam. Plaub, lub rooj sib txoos thiab cov cua kub dissipation zoo muab los ntawm cov qauv axial txhuas yuav tsum tsis txhob saib xyuas. Lub axial lead layout yog ua raws li lub cev tivthaiv, ua kom yooj yim rau kev sib txuas hauv cov ntsaws - hauv PCB los ua ke thiab ua kom zoo dua cov cua kub dissipation txoj hauv kev, yog li txo qhov kev pheej hmoo ntawm kev kub ntxhov hauv cheeb tsam. Cov qauv no nthuav tawm cov kev vibration zoo dua piv rau qee cov pob khoom nto-mount nyob rau hauv cov neeg kho tshuab kev nyuaj siab, ua rau nws tshwj xeeb tshaj yog haum rau cov ntawv thov uas xav tau kev txhim kho zoo heev.
Tsis tas li ntawd, qhov ntev lifespan thiab tsis tshua muaj to tam sim no yam ntxwv tshwm sim los ntawm qhov ceev ntawm dielectric txheej thiab corrosion kuj ntawm tantalum substrate. Nyob rau hauv tej yam kev mob uas tsis muaj huab cua surges thiab overvoltage, axial tantalum capacitors tuaj yeem tswj kev ua haujlwm ruaj khov rau ntau xyoo, nrog rau cov dej ntws tam sim no nyob rau theem qis heev. Qhov no yog qhov tseem ceeb tshwj xeeb rau kev tswj hwm roj teeb, kev sib txuas lus, thiab lwm yam kev siv uas yuav tsum tau ua haujlwm ntev - lub sijhawm ua haujlwm tas mus li.
Zuag qhia tag nrho, cov yam ntxwv ntawm axial tantalum capacitors qhia tau hais tias muaj txiaj ntsig zoo nrog rau qhov siab ceev, tsis tshua muaj kev poob qis, qhov kub thiab txias ntau, kev ntseeg siab, thiab muaj zog cov qauv kev hloov pauv. Cov yam ntxwv no tsis raug cais tawm tab sis ua tiav los ntawm kev sib koom ua ke ntawm kev xaiv cov khoom siv, cov txheej txheem precision, thiab cov qauv tsim, ua rau lawv qhov tseem ceeb tseem ceeb ntawm lub zog khaws cia thiab lim cov khoom hauv siab -kawg hluav taws xob, tsis tu ncua muab kev txhawb nqa ruaj khov rau kev ua haujlwm ruaj khov ntawm cov khoom siv hluav taws xob.
