Muaj ob hom loj ntawm MOSFET: split junction type thiab insulated gate type. Junction MOSFET (JFET) yog lub npe vim nws muaj ob lub PN junctions, thiab cov rooj vag insulatedMOSFET(JGFET) muaj npe vim hais tias lub rooj vag yog insulated los ntawm lwm yam electrodes. Tam sim no, ntawm cov rooj vag insulated MOSFETs, feem ntau siv ib qho yog MOSFET, hu ua MOSFET (hlau-oxide-semiconductor MOSFET); Tsis tas li ntawd, muaj PMOS, NMOS thiab VMOS lub zog MOSFETs, nrog rau cov tsis ntev los no launched πMOS thiab VMOS fais fab modules, thiab lwm yam.
Raws li cov ntaub ntawv sib txawv ntawm cov khoom siv hluav taws xob, cov khoom sib txuas thiab cov rooj sib txuas insulating tau muab faib ua cov channel thiab P channel. Yog hais tias muab faib raws li hom conductivity, MOSFET tuaj yeem muab faib ua hom depletion thiab hom kev txhim kho. Junction MOSFETs yog txhua hom depletion, thiab cov rooj vag MOSFETs yog ob hom depletion thiab hom kev txhim kho.
Field effect transistors tuaj yeem muab faib ua junction field effect transistors thiab MOSFETs. MOSFETs tau muab faib ua plaub pawg: N-channel depletion hom thiab hom kev txhim kho; P-channel depletion hom thiab hom kev txhim kho.
Cov yam ntxwv ntawm MOSFET
Tus yam ntxwv ntawm MOSFET yog lub rooj vag sab qab teb voltage UG; uas tswj nws cov dej ntws tam sim no ID. Piv nrog rau cov zoo tib yam bipolar transistors, MOSFETs muaj cov yam ntxwv ntawm siab input impedance, tsis tshua muaj suab nrov, loj dynamic ntau, tsawg zog noj, thiab yooj yim kev koom ua ke.
Thaum tus nqi tsis zoo ntawm qhov tsis zoo ntawm qhov tsis zoo (-UG) nce, cov txheej txheem depletion nce, cov channel txo qis, thiab cov dej ntws tam sim no txo qis. Thaum tus nqi tseeb ntawm qhov tsis zoo ntawm qhov tsis zoo voltage (-UG) txo qis, cov txheej txheem depletion txo, cov channel nce, thiab qhov ntws tam sim no ID nce. Nws tuaj yeem pom tias tus ID ntws tam sim no yog tswj los ntawm lub qhov rooj qhov hluav taws xob, yog li MOSFET yog cov khoom siv hluav taws xob tswj hluav taws xob, uas yog, cov kev hloov pauv ntawm cov zis tam sim no yog tswj los ntawm cov kev hloov pauv hauv qhov hluav taws xob input, thiaj li ua kom tau txais amplification thiab lwm lub hom phiaj.
Zoo li bipolar transistors, thaum MOSFET siv nyob rau hauv circuits xws li amplification, ib tug bias voltage kuj yuav tsum tau ntxiv rau nws lub rooj vag.
Lub rooj vag ntawm qhov sib txuas ntawm qhov hluav taws xob ua haujlwm yuav tsum tau siv nrog lub qhov hluav taws xob rov qab, uas yog, lub qhov rooj tsis zoo yuav tsum tau siv rau N-channel raj thiab lub rooj vag zoo yuav tsum tau siv rau P-channel raj. Lub rooj vag muaj zog MOSFET yuav tsum siv rau pem hauv ntej lub rooj vag voltage. Lub rooj vag voltage ntawm lub depletion-hom insulating MOSFET tuaj yeem ua tau zoo, tsis zoo, lossis "0". Cov txheej txheem ntawm kev ntxiv kev tsis ncaj ncees suav nrog txoj hauv kev ruaj khov, txoj kev muab tus kheej tsis ncaj ncees, txoj kev sib txuas ncaj qha, thiab lwm yam.
MOSFETmuaj ntau yam tsis xws luag, suav nrog DC tsis, AC tsis txwv thiab txwv tsis pub, tab sis nyob rau hauv ib txwm siv, koj tsuas yog yuav tsum tau them sai sai rau cov nram qab no tsis: saturated ntws-qhov tam sim no IDSS pinch-tawm voltage Up, (hluav taws xob raj thiab depletion hom insulated. gate tube, lossis tig-on Voltage UT (inforced insulated gate tube), transconductance gm, drain-source breakdown voltage BUDS, siab tshaj plaws Dissipation PDSM thiab qhov siab tshaj plaws ntws-qhov tam sim no IDSM.
(1) Saturated ntws-qhov tam sim no
Lub saturated drain-source tam sim no IDSS hais txog qhov ntws-qhov tam sim no thaum lub qhov rooj voltage UGS = 0 nyob rau hauv ib qho kev sib tshuam los yog depletion insulated rooj vag MOSFET.
(2) Pinch-off voltage
Lub pinch-off voltage UP yog hais txog lub qhov rooj qhov hluav taws xob thaum lub qhov dej-qhov kev sib txuas tsuas yog txiav tawm hauv qhov sib txuas lossis depletion-type insulated gate MOSFET. Raws li qhia hauv 4-25 rau UGS-ID nkhaus ntawm N-channel raj, lub ntsiab lus ntawm IDSS thiab UP tuaj yeem pom meej.
(3) Tig voltage
Lub turn-on voltage UT yog hais txog lub rooj vag voltage thaum lub qhov dej-qhov kev twb kev txuas tsuas yog ua nyob rau hauv lub reinforced insulated rooj vag MOSFET. Daim duab 4-27 qhia txog UGS-ID nkhaus ntawm N-channel raj, thiab lub ntsiab lus ntawm UT tuaj yeem pom meej.
(4) Transconductance
Transconductance gm sawv cev rau lub peev xwm ntawm lub rooj vag-qhov hluav taws xob voltage UGS los tswj cov dej ntws tam sim no ID, uas yog, qhov sib piv ntawm qhov kev hloov pauv hauv cov dej ntws tam sim no rau kev hloov pauv hauv lub qhov rooj-qhov voltage UGS. 9m yog ib qho tseem ceeb parameter los ntsuas lub amplification muaj peev xwm ntawmMOSFET.
(5) Dej-qhov chaw tawg voltage
Lub qhov dej-qhov tawg qhov hluav taws xob BUDS hais txog qhov siab tshaj plaws ntws-qhov hluav taws xob uas MOSFET tuaj yeem txais tau thaum lub rooj vag-qhov voltage UGS tas li. Qhov no yog qhov txwv tsis pub, thiab qhov kev khiav hauj lwm voltage siv rau MOSFET yuav tsum tsawg dua BUDS.
(6) Lub zog siab tshaj plaws dissipation
Qhov siab tshaj plaws lub zog dissipation PDSM kuj yog qhov txwv tsis pub, uas yog hais txog qhov siab tshaj plaws ntws-qhov hluav taws xob dissipation tso cai yam tsis muaj kev ua haujlwm ntawm MOSFET. Thaum siv, qhov tseeb siv hluav taws xob ntawm MOSFET yuav tsum tsawg dua PDSM thiab tawm ntawm qee qhov npoo.
(7) Qhov siab tshaj plaws ntws-qhov tam sim no
Qhov siab tshaj plaws ntws-qhov tam sim no IDSM yog lwm qhov txwv tsis pub, uas yog hais txog qhov siab tshaj plaws tam sim no tso cai hla ntawm qhov ntws thiab qhov chaw thaum MOSFET ua haujlwm ib txwm. Kev khiav hauj lwm tam sim no ntawm MOSFET yuav tsum tsis pub tshaj IDSM.
1. MOSFET tuaj yeem siv rau kev nthuav dav. Txij li cov input impedance ntawm MOSFET amplifier yog siab heev, lub coupling capacitor yuav ua tau me me thiab electrolytic capacitors tsis tas yuav siv.
2. Lub siab input impedance ntawm MOSFET yog heev haum rau impedance transformation. Nws yog feem ntau siv rau impedance transformation nyob rau hauv lub tswv yim theem ntawm multi-theem amplifiers.
3. MOSFET tuaj yeem siv los ua qhov hloov pauv hloov tau.
4. MOSFET tuaj yeem yooj yim siv los ua qhov chaw tam sim no.
5. MOSFET tuaj yeem siv los ua hluav taws xob hloov.
MOSFET muaj cov yam ntxwv ntawm kev ua haujlwm tsis muaj zog, siab tiv taus hluav taws xob, hloov ceev ceev, thiab siab avalanche zog. Qhov ntsuas tam sim no yog 1A-200A thiab qhov ntsuas hluav taws xob yog 30V-1200V. Peb tuaj yeem kho cov hluav taws xob tsis zoo raws li tus neeg siv khoom daim ntawv thov teb thiab daim ntawv thov kev npaj los txhim kho cov neeg siv khoom kev ntseeg siab, tag nrho kev hloov pauv kev ua haujlwm thiab cov khoom lag luam tus nqi sib tw.
MOSFET vs Transistor Sib piv
(1) MOSFET yog cov khoom siv hluav taws xob tswj hluav taws xob, thaum lub tshuab hluav taws xob yog lub zog tswj tam sim no. Thaum tsuas yog ib qho me me ntawm tam sim no raug tso cai los ntawm lub teeb liab, yuav tsum siv MOSFET; Thaum lub teeb liab hluav taws xob qis thiab qhov loj ntawm tam sim no raug tso cai los ntawm lub teeb liab, yuav tsum siv lub transistor.
(2) MOSFET siv cov neeg nqa khoom feem ntau los ua hluav taws xob, yog li nws raug hu ua lub tshuab hluav taws xob unipolar, thaum transistors muaj ob qho tib si feem ntau cov neeg nqa khoom thiab cov neeg nqa khoom tsawg los ua hluav taws xob. Nws yog hu ua cov khoom siv bipolar.
(3) Lub hauv paus thiab ntws ntawm qee qhov MOSFET tuaj yeem siv sib hloov, thiab lub rooj vag hluav taws xob tuaj yeem ua qhov zoo lossis tsis zoo, uas yog hloov tau ntau dua li cov transistors.
(4) MOSFET tuaj yeem ua haujlwm raws li qhov tam sim no me me thiab tsis tshua muaj hluav taws xob tsawg, thiab nws cov txheej txheem tsim khoom tuaj yeem yooj yim integrate ntau MOSFETs ntawm silicon wafer. Yog li ntawd, MOSFETs tau dav siv nyob rau hauv loj-scale integrated circuits.
Yuav txiav txim qhov zoo thiab polarity ntawm MOSFET li cas
Xaiv qhov ntau ntawm multimeter mus rau RX1K, txuas cov kev sim dub coj mus rau D ncej, thiab qhov kev sim liab ua rau S ncej. Kov tus ncej G thiab D tib lub sijhawm nrog koj txhais tes. MOSFET yuav tsum nyob rau hauv ib qho instantaneous conduction xeev, uas yog, lub meter koob swings mus rau ib txoj hauj lwm nrog ib tug me me kuj. , thiab tom qab ntawd kov tus ncej G thiab S nrog koj txhais tes, MOSFET yuav tsum tsis muaj lus teb, uas yog, koob ntsuas ntsuas yuav tsis txav rov qab mus rau qhov chaw xoom. Lub sijhawm no, nws yuav tsum txiav txim siab tias MOSFET yog lub raj zoo.
Xaiv qhov ntau ntawm multimeter rau RX1K, thiab ntsuas qhov kev tiv thaiv ntawm peb tus pins ntawm MOSFET. Yog tias qhov kev tawm tsam ntawm ib tus pin thiab ob tus pins yog qhov tsis muaj qhov kawg, thiab nws tseem nyob tsis kawg tom qab sib pauv cov kev xeem coj, Ces tus pin no yog G ncej, thiab ob tus pins yog S ncej thiab D ncej. Tom qab ntawd siv lub multimeter los ntsuas qhov ntsuas tus nqi ntawm tus ncej S thiab D ncej ib zaug, hloov qhov kev xeem coj thiab ntsuas dua. Ib qho nrog tus nqi qis dua yog xim dub. Cov txhuas xeem txuas nrog S ncej, thiab cov hlau kuaj liab txuas nrog D ncej.
MOSFET nrhiav kom tau thiab ceev faj siv
1. Siv tus pointer multimeter los txheeb xyuas MOSFET
1) Siv txoj kev ntsuas ntsuas los txheeb xyuas cov electrodes ntawm kev sib tshuam MOSFET
Raws li qhov tshwm sim uas qhov tseem ceeb rau pem hauv ntej thiab thim rov qab qhov tseem ceeb ntawm PN kev sib tshuam ntawm MOSFET sib txawv, peb lub electrodes ntawm junction MOSFET tuaj yeem txheeb xyuas. Txoj kev tshwj xeeb: Teem lub multimeter mus rau R × 1k ntau yam, xaiv ob lub electrodes, thiab ntsuas lawv qhov tseem ceeb rau pem hauv ntej thiab thim rov qab. Thaum qhov tseem ceeb rau pem hauv ntej thiab thim rov qab qhov tseem ceeb ntawm ob lub electrodes sib npaug thiab ntau txhiab ohms, ces ob lub electrodes yog qhov ntws D thiab qhov chaw S feem. Vim hais tias rau kev sib tshuam MOSFETs, cov dej ntws thiab qhov chaw sib hloov tau, qhov seem electrode yuav tsum yog lub rooj vag G. Koj tuaj yeem kov cov xim dub test lead (liab test lead kuj tau txais) ntawm lub multimeter rau ib qho electrode, thiab lwm yam kev sim ua rau. kov ob lub electrodes ntxiv nyob rau hauv ib ntu los ntsuas tus nqi tsis kam. Thaum qhov ntsuas qhov ntsuas ob zaug yog kwv yees li qhov sib npaug, cov electrode nyob rau hauv kev sib cuag nrog cov hlau lead dub yog lub rooj vag, thiab lwm yam ob lub electrodes yog qhov ntws thiab qhov chaw feem. Yog tias qhov ntsuas qhov ntsuas ob zaug yog ob qho tib si loj heev, nws txhais tau hais tias nws yog qhov kev taw qhia rov qab ntawm PN hlws ris, uas yog, lawv yog ob qho tib si thim rov qab. Nws tuaj yeem txiav txim siab tias nws yog N-channel MOSFET, thiab cov hlau kuaj dub txuas nrog lub rooj vag; Yog tias qhov ntsuas qhov ntsuas ob zaug yog qhov kev tiv thaiv qhov tseem ceeb me me, qhia tias nws yog ib qho kev sib tshuam PN rau pem hauv ntej, uas yog, kev tiv thaiv pem hauv ntej, thiab nws tau txiav txim siab los ua P-channel MOSFET. Cov hlau kuaj dub kuj txuas nrog lub rooj vag. Yog tias qhov xwm txheej saum toj no tsis tshwm sim, koj tuaj yeem hloov qhov kev xeem dub thiab liab thiab ua qhov kev xeem raws li cov txheej txheem saum toj no kom txog rau thaum daim phiaj raug txheeb xyuas.
2) Siv txoj kev ntsuas kev tiv thaiv los txiav txim siab qhov zoo ntawm MOSFET
Txoj kev ntsuas kev tiv thaiv yog siv multimeter los ntsuas qhov tsis kam ntawm MOSFET qhov chaw thiab ntws, rooj vag thiab qhov chaw, rooj vag thiab ntws, rooj vag G1 thiab rooj vag G2 los txiav txim seb nws puas phim tus nqi tiv thaiv tau teev tseg hauv MOSFET phau ntawv. Kev tswj hwm yog qhov zoo lossis tsis zoo. Txoj kev tshwj xeeb: Ua ntej, teeb lub multimeter rau R × 10 lossis R × 100 ntau yam, thiab ntsuas qhov kev tawm tsam ntawm qhov chaw S thiab qhov ntws D, feem ntau nyob rau hauv thaj tsam ntawm kaum ntawm ohms mus rau ntau txhiab ohms (nws tuaj yeem pom hauv phau ntawv uas muaj ntau yam qauv raj, lawv qhov tseem ceeb kuj sib txawv), yog hais tias qhov ntsuas kuj muaj nuj nqis ntau dua li tus nqi ib txwm, nws yuav yog vim tsis zoo sab hauv; Yog hais tias qhov ntsuas tsis kam ntsuas tus nqi yog infinite, nws yuav yog ib tug sab hauv tawg ncej. Tom qab ntawd teeb lub multimeter rau R × 10k ntau, thiab tom qab ntawd ntsuas qhov ntsuas qhov tseem ceeb ntawm lub rooj vag G1 thiab G2, nruab nrab ntawm lub rooj vag thiab qhov chaw, thiab nruab nrab ntawm lub rooj vag thiab qhov ntws. Thaum ntsuas qhov ntsuas qhov ntsuas yog tag nrho infinite, ces Nws txhais tau hais tias lub raj yog ib txwm; yog hais tias cov saum toj no kuj tseem ceeb heev me me los yog muaj ib txoj kev, nws txhais tau hais tias lub raj yog phem. Nws yuav tsum raug sau tseg tias yog tias ob lub rooj vag tawg hauv lub raj, cov txheej txheem hloov khoom siv tuaj yeem siv los kuaj xyuas.
3) Siv cov teeb liab induction input txoj kev los kwv yees lub peev xwm amplification ntawm MOSFET
Txoj kev tshwj xeeb: Siv R × 100 qib ntawm multimeter tsis kam, txuas cov kev sim liab coj mus rau qhov chaw S, thiab qhov kev sim dub ua rau lub qhov dej D. Ntxiv 1.5V fais fab mov voltage rau MOSFET. Lub sijhawm no, tus nqi tiv thaiv ntawm qhov ntws thiab qhov chaw yog qhia los ntawm rab koob 'meter'. Tom qab ntawd rub lub rooj vag G ntawm kev sib tshuam MOSFET nrog koj txhais tes, thiab ntxiv cov teeb liab induced voltage ntawm tib neeg lub cev mus rau lub rooj vag. Nyob rau hauv txoj kev no, vim yog cov nyhuv amplification ntawm lub raj, qhov ntws-qhov voltage VDS thiab qhov ntws tam sim no Ib yuav hloov, uas yog, qhov kev tawm tsam ntawm qhov ntws thiab qhov chaw yuav hloov. Los ntawm qhov no, nws tuaj yeem pom tias 'meter' koob swings mus rau qhov loj. Yog tias rab koob ntawm tes-tuav daim phiaj koob viav vias me me, nws txhais tau hais tias lub peev xwm amplification ntawm lub raj tsis zoo; yog tias rab koob viav vias zoo heev, nws txhais tau hais tias lub peev xwm amplification ntawm lub raj yog loj; yog tias rab koob tsis txav, txhais tau hais tias lub raj tsis zoo.
Raws li cov txheej txheem saum toj no, peb siv R × 100 nplai ntawm multimeter los ntsuas qhov sib txuas MOSFET 3DJ2F. Ua ntej qhib G electrode ntawm lub raj thiab ntsuas qhov ntws-qhov chaw tsis kam RDS kom 600Ω. Tom qab tuav lub G electrode nrog koj txhais tes, lub meter koob hloov mus rau sab laug. Qhov taw qhia tsis kam RDS yog 12kΩ. Yog hais tias lub meter koob viav vias loj, nws txhais tau hais tias lub raj yog zoo. , thiab muaj peev xwm amplification ntau dua.
Muaj ob peb lub ntsiab lus uas yuav tsum nco ntsoov thaum siv txoj kev no: Ua ntej, thaum kuaj MOSFET thiab tuav lub rooj vag nrog koj txhais tes, lub koob multimeter yuav viav vias mus rau sab xis (tus nqi tsis kam txo) lossis sab laug (tus nqi kuj nce ntxiv) . Qhov no yog vim qhov tseeb tias AC voltage induced los ntawm tib neeg lub cev yog qhov siab, thiab MOSFETs sib txawv yuav muaj cov ntsiab lus ua haujlwm sib txawv thaum ntsuas nrog qhov tsis kam (xws li kev khiav hauj lwm hauv cheeb tsam saturated lossis cheeb tsam tsis txaus). Kev ntsuam xyuas tau pom tias RDS ntawm cov hlab feem ntau nce. Ntawd yog, lub watch tes swings mus rau sab laug; RDS ntawm ob peb lub raj txo qis, ua rau lub watch tes tig mus rau sab xis.
Tab sis txawm hais tias qhov kev taw qhia ntawm lub watch tes viav vias, ntev npaum li lub watch tes viav vias loj dua, nws txhais tau hais tias lub raj muaj peev xwm nthuav dav ntau dua. Qhov thib ob, txoj kev no kuj ua haujlwm rau MOSFETs. Tab sis nws yuav tsum tau muab sau tseg tias input resistance ntawm MOSFET yog siab, thiab qhov tso cai induced voltage ntawm lub rooj vag G yuav tsum tsis txhob siab dhau, yog li tsis txhob pinch lub rooj vag ncaj qha nrog koj txhais tes. Koj yuav tsum siv lub ntsuas hluav taws xob ntawm cov ntsia hlau los kov lub rooj vag nrog ib tus pas hlau. , los tiv thaiv tus nqi induced los ntawm tib neeg lub cev los ntawm ncaj qha ntxiv rau lub rooj vag, ua rau lub rooj vag tawg. Thib peb, tom qab txhua qhov ntsuas, GS ncej yuav tsum luv luv. Qhov no yog vim hais tias yuav muaj me me ntawm tus nqi ntawm GS hlws ris capacitor, uas tsim cov VGS voltage. Yog li ntawd, txhais tes ntawm lub ntsuas yuav tsis txav thaum ntsuas dua. Tib txoj hauv kev kom tso tawm cov nqi yog luv luv ntawm cov nqi ntawm GS electrodes.
4) Siv txoj kev ntsuas kev tiv thaiv txhawm rau txheeb xyuas MOSFETs tsis muaj cim
Ua ntej, siv txoj kev ntsuas kev tiv thaiv kom pom ob tus pins nrog qhov tseem ceeb ntawm kev tiv thaiv, uas yog lub hauv paus S thiab qhov ntws D. Qhov seem ob tus pins yog thawj lub rooj vag G1 thiab lub rooj vag thib ob G2. Sau tus nqi tsis kam ntawm qhov S thiab qhov ntws D ntsuas nrog ob qhov kev xeem ua ntej. Hloov cov kev xeem coj thiab ntsuas dua. Sau tus nqi ntsuas ntsuas. Ib qho uas muaj qhov loj dua qhov ntsuas ntsuas ob zaug yog cov hmoov txhuas dub. Qhov txuas electrode yog qhov ntws D; cov hlau kuaj liab txuas nrog lub hauv paus S. S thiab D ncej tau txheeb xyuas los ntawm txoj kev no kuj tuaj yeem txheeb xyuas los ntawm kev kwv yees lub peev xwm amplification ntawm lub raj. Ntawd yog, cov hlau lead kuaj dub nrog lub peev xwm loj loj txuas nrog rau D ncej; cov hlau kuaj liab txuas nrog hauv av mus rau 8-ncej. Cov txiaj ntsig ntawm ob txoj hauv kev yuav tsum yog tib yam. Tom qab txiav txim siab txoj haujlwm ntawm cov dej ntws D thiab qhov chaw S, teeb tsa lub voj voog raws li cov haujlwm sib txuas ntawm D thiab S. Feem ntau, G1 thiab G2 kuj yuav ua raws li cov kab ke. Qhov no txiav txim siab txoj haujlwm ntawm ob lub rooj vag G1 thiab G2. Qhov no txiav txim siab qhov kev txiav txim ntawm D, S, G1, thiab G2 pins.
5) Siv qhov kev hloov pauv ntawm tus nqi rov qab los txiav txim qhov loj ntawm transconductance
Thaum ntsuas qhov transconductance kev ua tau zoo ntawm VMOSN channel txhim kho MOSFET, koj tuaj yeem siv cov kev sim liab coj los txuas rau qhov S thiab qhov kev sim dub coj mus rau qhov dej D. Qhov no sib npaug rau kev ntxiv qhov thim rov qab ntawm qhov chaw thiab qhov ntws. Lub sijhawm no, lub rooj vag qhib Circuit Court, thiab tus nqi rov qab ntawm lub raj tsis ruaj khov heev. Xaiv qhov ntau yam ohm ntawm multimeter mus rau qhov siab tsis kam ntawm R × 10kΩ. Lub sijhawm no, qhov voltage hauv lub 'meter' siab dua. Thaum koj kov daim phiaj G nrog koj txhais tes, koj yuav pom tias tus nqi thim rov qab ntawm lub raj hloov pauv loj heev. Qhov kev hloov pauv ntau dua, qhov siab dua tus nqi transconductance ntawm lub raj; Yog hais tias lub transconductance ntawm lub raj nyob rau hauv kev ntsuam xyuas yog heev me me, siv txoj kev no los ntsuas Thaum , qhov rov qab tsis kam hloov me ntsis.
Kev ceev faj rau kev siv MOSFET
1) Yuav kom siv MOSFET yam xyuam xim, qhov txwv qhov tseem ceeb ntawm cov tsis xws li lub zog dissipated ntawm lub raj, qhov siab tshaj plaws ntws-qhov hluav taws xob, qhov siab tshaj plaws qhov rooj qhov hluav taws xob, thiab qhov siab tshaj plaws tam sim no tsis tuaj yeem tshaj hauv kev tsim hluav taws xob.
2) Thaum siv ntau hom MOSFET, lawv yuav tsum tau txuas nrog lub voj voog kom nruj raws li qhov yuav tsum tau ua, thiab qhov polarity ntawm MOSFET kev tsis ncaj ncees yuav tsum raug soj ntsuam. Piv txwv li, muaj PN hlws ris nruab nrab ntawm lub qhov rooj qhov chaw thiab ntws ntawm ib tug junction MOSFET, thiab lub rooj vag ntawm ib tug N-channel raj yuav tsis tau zoo biased; Lub rooj vag ntawm P-channel raj tsis tuaj yeem ua rau tsis zoo, thiab lwm yam.
3) Vim hais tias cov input impedance ntawm MOSFET yog siab heev, cov pins yuav tsum luv luv-circuited thaum lub sij hawm thauj mus los thiab cia, thiab yuav tsum tau ntim nrog hlau shielding los tiv thaiv sab nraud induced muaj peev xwm los ntawm tawg ntawm lub rooj vag. Tshwj xeeb, thov nco ntsoov tias MOSFET tsis tuaj yeem muab tso rau hauv lub thawv yas. Nws yog qhov zoo tshaj rau khaws cia rau hauv lub thawv hlau. Nyob rau tib lub sijhawm, ua tib zoo saib xyuas cov raj dej noo-pov thawj.
4) Txhawm rau tiv thaiv MOSFET rooj vag inductive tawg, tag nrho cov cuab yeej ntsuas, cov rooj zaum ua haujlwm, cov hlau nplaum, thiab cov khoom siv hluav taws xob lawv tus kheej yuav tsum tau ua kom zoo; thaum soldering pins, solder qhov chaw ua ntej; ua ntej txuas mus rau hauv Circuit Court, lub raj Txhua qhov kawg ntawm cov hlau lead yuav tsum yog luv luv rau ib leeg, thiab cov khoom siv luv luv yuav tsum raug tshem tawm tom qab vuam tiav; thaum tshem lub raj los ntawm cov khoom khib nyiab, cov txheej txheem tsim nyog yuav tsum tau siv los xyuas kom meej tias tib neeg lub cev yog av, xws li siv lub nplhaib hauv av; Yog lawm, yog tias qib siab A gas-rhuab soldering hlau yog yooj yim dua rau vuam MOSFETs thiab ua kom muaj kev nyab xeeb; lub raj yuav tsum tsis txhob muab tso rau hauv lossis rub tawm ntawm lub voj voog ua ntej lub hwj chim yuav raug muab tua. Cov kev ntsuas kev nyab xeeb saum toj no yuav tsum tau them sai sai rau thaum siv MOSFET.
5) Thaum txhim kho MOSFET, xyuam xim rau txoj haujlwm teeb tsa thiab sim ua kom tsis txhob nyob ze rau cov cua sov; txhawm rau tiv thaiv kev vibration ntawm cov yeeb nkab fittings, nws yog ib qho tsim nyog yuav tsum tau ceev lub plhaub ntawm lub raj; thaum tus pin coj yog khoov, lawv yuav tsum yog 5 hli loj dua cov hauv paus loj kom paub meej tias Tsis txhob khoov cov pins thiab ua rau huab cua to.
Rau lub zog MOSFETs, cov cua kub zoo yuav tsum tau ua. Vim tias lub zog MOSFETs siv nyob rau hauv cov xwm txheej siab, cov dab dej kub txaus yuav tsum tau tsim los xyuas kom meej tias cov ntaub ntawv kub tsis tshaj qhov ntsuas tus nqi kom lub cuab yeej tuaj yeem ua haujlwm ruaj khov thiab ntseeg tau ntev.
Hauv luv luv, kom ntseeg tau tias kev siv MOSFETs muaj kev nyab xeeb, muaj ntau yam uas yuav tsum tau saib xyuas, thiab tseem muaj ntau yam kev ntsuas kev nyab xeeb uas yuav tsum tau ua. Feem ntau ntawm cov kws tshaj lij thiab cov kws tshaj lij, tshwj xeeb tshaj yog feem ntau ntawm cov neeg nyiam siv hluav taws xob, yuav tsum tau ua raws li lawv qhov xwm txheej tiag tiag thiab siv txoj hauv kev los siv MOSFETs kom nyab xeeb thiab zoo.