Cov yam ntxwv ntawm MOSFETs thiab ceev faj rau kev siv

I. Kev txhais ntawm MOSFET

Raws li lub zog-tsav, cov khoom siv tam sim no, MOSFETs muaj ntau daim ntawv thov hauv circuits, tshwj xeeb tshaj yog cov tshuab fais fab. MOSFET lub cev diodes, tseem hu ua parasitic diodes, tsis pom nyob rau hauv lithography ntawm integrated circuits, tab sis muaj nyob rau hauv cais MOSFET li, uas muab kev tiv thaiv rov qab thiab tam sim no continuation thaum tsav los ntawm high tam sim no thiab thaum inductive loads.

Vim tias muaj cov diode no, MOSFET cov cuab yeej tsis tuaj yeem pom qhov hloov pauv hauv ib lub voj voog, xws li nyob rau hauv lub voj voog uas them nyiaj tiav, lub zog raug tshem tawm thiab lub roj teeb rov qab mus rau sab nraud, uas feem ntau yog qhov tsis xav tau.

Cov yam ntxwv ntawm MOSFETs thiab kev ceev faj rau kev siv

Txoj kev daws teeb meem dav dav yog ntxiv lub diode nyob tom qab txhawm rau tiv thaiv kev rov qab fais fab, tab sis cov yam ntxwv ntawm lub diode txiav txim siab qhov xav tau rau pem hauv ntej qhov hluav taws xob poob ntawm 0.6 ~ 1V, uas ua rau muaj hluav taws kub loj ntawm cov hluav taws xob siab thaum ua rau khib nyiab. ntawm lub zog thiab txo qhov kev siv hluav taws xob tag nrho. Lwm txoj hauv kev yog los ntxiv ib qho rov qab-rau-rov qab MOSFET, siv qhov tsis muaj zog ntawm MOSFET kom ua tiav lub zog ua haujlwm.

Nws yuav tsum tau muab sau tseg tias tom qab conduction, lub MOSFET tsis-directional, yog li tom qab pressurized conduction, nws yog sib npaug nrog ib tug hlau, tsuas yog resistive, tsis muaj nyob rau hauv lub xeev voltage poob, feem ntau saturated on-ua hauj rau ob peb milliohms rau.raws sijhawm milliohms, thiab tsis yog kev taw qhia, cia DC thiab AC fais fab kis mus.

II. Cov yam ntxwv ntawm MOSFETs

1, MOSFET yog cov khoom siv hluav taws xob tswj hluav taws xob, tsis tas yuav tsum muaj theem propulsion los tsav cov hluav taws xob siab;

2, Siab input kuj;

3, dav kev khiav hauj lwm ntau zaus, siab switching ceev, tsawg poob

4, AC nyiam siab impedance, tsis tshua muaj suab nrov.

5,Kev siv ntau qhov sib npaug, nce cov zis tam sim no

Qhov thib ob, kev siv MOSFETs hauv cov txheej txheem ceev faj

1, txhawm rau xyuas kom muaj kev nyab xeeb ntawm kev siv MOSFET, nyob rau hauv txoj kab tsim, yuav tsum tsis txhob tshaj lub raj xa hluav taws xob dissipation, qhov siab tshaj qhov hluav taws xob qhov hluav taws xob, qhov rooj qhov hluav taws xob thiab qhov tam sim no thiab lwm yam kev txwv qhov tseem ceeb.

2, ntau hom MOSFETs siv, yuav tsumyuav nruj me ntsis hauv raws li qhov yuav tsum tau muaj kev tsis ncaj ncees rau hauv Circuit Court, ua raws li qhov polarity ntawm MOSFET offset.

3. Thaum txhim kho MOSFET, ua tib zoo saib xyuas qhov chaw teeb tsa kom tsis txhob ze rau cov cua sov. Txhawm rau tiv thaiv kev co ntawm cov fittings, lub plhaub yuav tsum tau nruj; dabtsi yog khoov tus pin leads yuav tsum tau nqa tawm ntawm ntau tshaj li lub hauv paus loj ntawm 5 hli los tiv thaiv tus pin ntawm dabtsi yog khoov tawm thiab to.

4, vim muaj cov input impedance siab heev, MOSFETs yuav tsum tau luv luv ntawm tus pin thaum lub sij hawm thauj mus los thiab cia, thiab ntim nrog hlau shielding los tiv thaiv sab nraud induced muaj peev xwm tawg ntawm lub rooj vag.

5. Lub rooj vag hluav taws xob ntawm kev sib tshuam MOSFETs tsis tuaj yeem thim rov qab thiab tuaj yeem khaws cia rau hauv lub xeev qhib, tab sis qhov kev tawm tsam ntawm cov khoom siv insulated-gate MOSFETs siab heev thaum lawv tsis siv, yog li txhua lub electrode yuav tsum luv luv. Thaum soldering insulated-gate MOSFETs, ua raws li qhov kev txiav txim ntawm qhov chaw-drain-gate, thiab solder nrog fais fab tuag.

Txhawm rau kom muaj kev nyab xeeb ntawm kev siv MOSFETs, koj yuav tsum nkag siab tag nrho cov yam ntxwv ntawm MOSFETs thiab cov lus ceeb toom yuav tsum tau ua thaum siv cov txheej txheem, Kuv vam tias cov ntsiab lus saum toj no yuav pab tau koj.