Hlau-oxide-semiconductor field-effect transistors (MOSFETs) tau dhau los ua cov khoom tseem ceeb hauv cov khoom siv hluav taws xob niaj hnub no, vim lawv qhov kev hloov pauv tau zoo thiab ua haujlwm tau zoo. Embedded nyob rau hauv lub MOSFET qauv lus dag ib tug feem ntau-overlooked tsis tau tseem ceeb lub ntsiab: lub cev diode. Cov khoom tseem ceeb no ua lub luag haujlwm tseem ceeb hauv kev tiv thaiv hluav taws xob thiab kev ua haujlwm. Txawm li cas los xij, MOSFET lub cev diodes tuaj yeem ua rau tsis ua haujlwm, ua rau lub cev tsis ua haujlwm thiab muaj peev xwm muaj kev nyab xeeb. Nkag siab txog qhov ua rau lub zog MOSFET diode tsis ua haujlwm yog qhov tseem ceeb rau kev tsim cov tshuab hluav taws xob txhim khu kev qha thiab muaj zog.
Unveiling lub hauv paus ua rau lub hwj chim MOSFET Diode Failure
Overvoltage Stress: Tshaj dhau lub cev diode qhov rov qab qhov ntsuas hluav taws xob tuaj yeem ua rau tawg sai sai, ua rau muaj kev puas tsuaj rau lub diode hlws ris. Qhov no tuaj yeem tshwm sim vim qhov hluav taws xob hloov pauv hloov pauv, hluav taws xob tawm tsam, lossis kev tsim hluav taws xob tsis raug.
Overcurrent Stress: Tshaj dhau lub cev diode lub peev xwm tuav tam sim no tuaj yeem ua rau muaj cua sov ntau dhau, ua rau lub diode hlws ris kom yaj lossis degrade. Qhov no tuaj yeem tshwm sim thaum lub sijhawm hloov pauv tam sim no lossis cov xwm txheej luv luv.
Rov qab Hloov Kev Nyuaj Siab: Rov ua dua qhov hloov ntawm MOSFET ntawm ntau zaus tuaj yeem ua rau qaug zog hauv lub cev diode hlws ris, ua rau micro-cracks thiab qhov kawg tsis ua haujlwm. Qhov no yog tshwj xeeb tshaj yog nyob rau hauv daim ntawv thov uas muaj xws li high-frequency switching thiab inductive loads.
Environmental Factors: Kev cuam tshuam rau ib puag ncig hnyav, xws li huab cua kub, av noo, lossis cov khoom corrosive, tuaj yeem ua kom lub cev degradation ntawm diode hlws ris, ua rau ua tsis tiav ntxov.
Manufacturing Defects: Nyob rau hauv tsawg zaus, manufacturing defects, xws li impurities los yog structural flaws nyob rau hauv lub diode hlws ris, yuav predispose lub cev diode rau tsis ua hauj lwm.
Cov tswv yim los tiv thaiv lub zog MOSFET Diode Failure
Kev tiv thaiv hluav taws xob: Siv cov khoom siv hluav taws xob-clamping, xws li Zener diodes lossis varistors, txhawm rau txwv tsis pub muaj hluav taws xob hloov pauv thiab tiv thaiv lub cev diode los ntawm overvoltage stress.
Kev txwv tam sim no: Siv cov kev txwv tam sim no, xws li fuses lossis active tam sim no limiting circuits, los tiv thaiv cov tam sim no ntau dhau los ntawm lub cev diode thiab tiv thaiv nws los ntawm overcurrent puas.
Snubber Circuits: Siv snubber circuits, muaj cov resistors thiab capacitors, kom dissipate zog khaws cia nyob rau hauv parasitic inductances thiab txo cov kev ntxhov siab ntawm lub cev diode.
Kev Tiv Thaiv Ib puag ncig: Muab cov khoom siv hluav taws xob hauv cov khoom tiv thaiv thiab siv cov txheej txheem tsim nyog los tiv thaiv lub cev diode los ntawm qhov hnyav ib puag ncig.
Cov Cheebtsam Zoo: Tau qhov zoo tshaj plaws MOSFETs los ntawm cov tuam txhab muaj koob npe kom txo qis kev pheej hmoo ntawm kev tsim khoom tsis xws luag hauv lub cev diode.
Xaus
Fais fab MOSFET lub cev diodes, thaum feem ntau saib tsis taus, ua lub luag haujlwm tseem ceeb hauv kev tiv thaiv hluav taws xob thiab kev ua haujlwm. Kev nkag siab txog qhov ua rau lawv tsis ua haujlwm thiab siv cov kev tiv thaiv kev tiv thaiv yog qhov tseem ceeb rau kev ua kom muaj kev ntseeg siab thiab siv tau ntev ntawm cov tshuab hluav taws xob. Los ntawm kev siv cov tswv yim no, cov kws tsim khoom tuaj yeem tsim cov khoom siv hluav taws xob zoo uas tiv taus cov kev xav tau ntawm kev ua haujlwm thiab txo qhov kev pheej hmoo ntawm MOSFET diode tsis ua haujlwm, tiv thaiv kev ncaj ncees ntawm cov khoom siv hluav taws xob thiab txhim kho kev nyab xeeb tag nrho.
Post lub sij hawm: Jun-07-2024