Tsav tsheb dhau tam sim no kev nyuab siab? Qhov teeb meem yog dab tsi?
Feem ntau kuv pom cov lus nug txog lub cav: xws li "Kuv lub tsheb tsav tau nres ua haujlwm zoo", "Kuv lub tsheb tsav puas ntsoog" thiab "Kuv lub cav tsis tig" thaum pib qhov teeb meem, lub hauv paus ua rau tom qab Nws yog feem ntau EOS.
Hauv qab no peb yuav tham me ntsis txog seb EOS yog dab tsi, thiab suav cov npe ntawm EOS hauv kev tsav tsheb.
Ua ntej, lub ntsiab txhais ntawm EOS
Qhov kev hloov hluav taws xob (EOS) hais txog qhov teeb meem tam sim no los sis qhov teeb meem uas qhov kev tivthaiv tau raug rau ntau tshaj qhov siab tshaj plaws. Kev ntxhov siab dhau tam sim no yog ib qho ntawm cov yam ntxwv uas cuam tshuam rau optocoupler devices.
Thib ob, EOS cov kev txwv tswj
Peb to taub tias EOS yog dab tsi, yog li cas peb thiaj paub tias qhov kev txwv yog dab tsi? Yuav kom ua tau li no, peb yuav tsum ua tib zoo soj ntsuam lub ntsiab lus tshaj plaws hauv cov ntaub ntawv hluav taws xob. Cov lus qhia meej txog kev siab tshaj plaws yog xws li tias lawv yuav ua puas tsuaj tas mus li. Nyob rau hauv cov ntaub ntawv cov ntaub ntawv ntawm cov khoom, qhov ntau tshaj plaws kev sib txawv ntawm qhov kev pom zoo rau kev khiav hauj lwm; Yog tias cov lus tshaj li cov haujlwm uas tau pom zoo, cov cuab yeej ua lag luam kuj tseem ua lag luam, tiam sis tsuas yog siv raws li cov kev cai khiav hauj lwm ntawm cov khoom specification. Ib qho piv txwv ntawm kev ua txhaum ntawm Chaws 1 yog: yog tias tus PIN fais fab tuag mus txog 50V vim muaj kev cuam tshuam ntawm lub hwj chim tsheb
Thib peb, cov keeb kwm ntawm EOS
Dab tsi yog cov hauv paus hauv paus ntawm EOS hauv kev tsav tsheb?
01, fais fab tuag overvoltage
Ib qho ntawm ntau qhov chaw ntawm EOS yog qhov kev tshwm sim overvoltage ntawm lub hwj huam khoom tawm ntawm lub cuab yeej. Fais fab tuag overvoltage tuaj yeem tshwm sim los ntawm lub zog hluav taws xob regenerative los yog lwm cov xwm txheej ntawm lub cev, xws li tiv thaiv kev tiv thaiv. Nkag siab lub hauv paus ua kom muaj kev sib tshuam ntau tshaj yuav tsum tswj xyuas qhov system hluav taws xob nyob hauv txhua txoj kev khiav haujlwm sab hauv thiab sab nraud.
02, hloov lub sijhawm nyoog
Lwm qhov chaw ntawm EOS phenomena nyob rau hauv lub cev muaj zog tsav tsheb yog qhov hluav taws xob transients txuam nrog kev hloov hluav taws xob hlau oxide semiconductor field effect transistors (MOSFETs). Nyob rau hauv ib qho kev zoo ib nrab-choj switching system, qhov hluav taws xob yuav hloov ntawm VGROUND thiab VSUPPLY. Tab sis qhov tseeb, cov kab txaij phem hauv lub hwj chim MOSFET thiab cov ntawv luam tawm Circuit Court Board (PCB) layouts tuaj yeem ua rau cov neeg tsis sib haum - qhov teeb meem yuav qis dua VGROUND lossis siab tshaj VSUPPLY
03, MOSFET overcurrent
TI's kev tsav tsheb muaj kev sib tw feature overcurrent thiab overtemperature tiv thaiv kom tsis txhob EOS nyob rau hauv overcurrent tej yam kev mob. Rau kev siv lub rooj tsav npav (nrog rau lwm lub hwjchim MOSFETs), kev saib xyuas yuav tsum tau ua kom tsis txhob ua txhaum MOSFET kev nyab xeeb kev khiav haujlwm cov cai. Lub hwj chim MOSFET cov khoom ntim feem ntau muaj xws li thaj tsam Safe Operating System (SOA). Ntev ntev npaum li cas hauv lub hwj chim MOSFET yuav ua rau tshwm sim rau thermal puas tsuaj rau lub cuab yeej lossis nws cov pob.
Yog tias koj xav yuav ib lub cav tsheb hauv vaj hauv tsev, thov them nqi rau lub tshuab synchronous.
