Pali mitundu iwiri ikuluikulu ya MOSFET: mtundu wa mphambano wogawanika ndi mtundu wa chipata cha insulated. Junction MOSFET (JFET) imatchedwa chifukwa ili ndi magawo awiri a PN, ndi chipata chotsekedwaMOSFET(JGFET) imatchedwa chifukwa chipatacho chimatsekedwa kwathunthu ndi maelekitirodi ena. Pakalipano, pakati pa zipata za MOSFET zotsekedwa, zomwe zimagwiritsidwa ntchito kwambiri ndi MOSFET, zomwe zimatchedwa MOSFET (metal-oxide-semiconductor MOSFET); kuwonjezera apo, pali PMOS, NMOS ndi VMOS mphamvu MOSFETs, komanso posachedwapa anayambitsa πMOS ndi VMOS mphamvu modules, etc.
Malinga ndi zida zosiyanasiyana za semiconductor, mtundu wa mphambano ndi mtundu wa chipata chotsekera zimagawidwa kukhala njira ndi P. Ngati agawika molingana ndi ma conductivity mode, MOSFET ikhoza kugawidwa mumtundu wa kuchepa ndi mtundu wowonjezera. Ma MOSFET a Junction onse ndi mtundu wa kutha, ndipo ma MOSFET a zipata zonse ndi mtundu wa kutha komanso mtundu wowonjezera.
Field effect transistors imatha kugawidwa m'magulu ophatikizira ma transistors ndi ma MOSFET. MOSFETs amagawidwa m'magulu anayi: N-channel depletion mtundu ndi mtundu wowonjezera; Mtundu wa P-channel depletion ndi mtundu wowonjezera.
Makhalidwe a MOSFET
Makhalidwe a MOSFET ndi magetsi akumwera kwa UG; yomwe imayendetsa ID yake yapano. Poyerekeza ndi ma transistors wamba a bipolar transistors, ma MOSFET ali ndi mawonekedwe azovuta zolowera kwambiri, phokoso lochepa, mitundu yayikulu yosinthika, kugwiritsa ntchito mphamvu zochepa, komanso kuphatikiza kosavuta.
Pamene mtengo wokwanira wa voteji yolakwika (-UG) ukuwonjezeka, kusanjikiza kocheperako kumawonjezeka, njirayo imachepa, ndipo ID yapano imachepa. Mtheradi wamtengo wapatali wa voteji yolakwika (-UG) ikachepa, gawo locheperako limachepa, njira imachulukira, ndipo ID yapano ikuwonjezeka. Zitha kuwoneka kuti kukhetsa kwapano ID kumayendetsedwa ndi voteji pachipata, kotero MOSFET ndi chipangizo choyendetsedwa ndi voteji, ndiye kuti, kusintha kwazomwe zikuchitika kumayendetsedwa ndi kusintha kwamagetsi olowera, kuti akwaniritse kukulitsa ndi zolinga zina.
Monga ma transistors a bipolar, MOSFET ikagwiritsidwa ntchito m'mabwalo monga kukulitsa, voteji ya bias iyeneranso kuwonjezeredwa pachipata chake.
Chipata cha mphambano yamtundu wa chubu chiyenera kugwiritsidwa ntchito ndi voliyumu yowonongeka, ndiko kuti, mpweya woipa wa chipata uyenera kuikidwa pa chubu la N-channel ndipo chiwombankhanga chapachipata chiyenera kuikidwa pa chubu la P-channel. MOSFET yotetezedwa ndi chipata cha MOSFET iyenera kugwiritsa ntchito voliyumu yakutsogolo. Mpweya wolowera pachipata cha depletion-mode insulating MOSFET ukhoza kukhala wabwino, woipa, kapena "0". Njira zowonjezerera kukondera zimaphatikizapo njira yokhazikika, njira yodzipangira nokha, njira yolumikizirana mwachindunji, ndi zina zambiri.
MOSFETili ndi magawo ambiri, kuphatikiza magawo a DC, magawo a AC ndi malire, koma pakugwiritsa ntchito bwino, muyenera kulabadira magawo akulu awa: saturated drain-source current IDSS pinch-off voltage Up, (junction chubu ndi depletion mode insulated insulated). pachipata, kapena kuyatsa Voltage UT (yowonjezera insulated pachipata chubu), transconductance gm, drain-source breakdown voltage BUDS, PDSM yotulutsa mphamvu yayikulu komanso IDSM yapano.
(1) Kukhetsa madzi-gwero la madzi
IDSS yodzaza ndi gwero lapano la IDSS imatanthawuza kukhetsa komwe kumachokera magetsi pomwe chipata cha UGS=0 pamphambano kapena chipata chotsekereza MOSFET.
(2) Kuchepetsa mphamvu yamagetsi
Pinch-off voltage UP imatanthawuza mphamvu yamagetsi yachipata pamene cholumikizira cholumikizira gwero chimangodulidwa pamphambano kapena chipata chamtundu wa MOSFET. Monga momwe zasonyezedwera mu 4-25 kwa UGS-ID yokhotakhota ya chubu la N-channel, tanthauzo la IDSS ndi UP likhoza kuwoneka bwino.
(3) Mphamvu yoyatsa
Voltage yotsegulira UT imatanthawuza mphamvu yamagetsi yachipata pamene kulumikizidwa kwa gwero kumangopangidwa pachipata cholimbitsa MOSFET. Chithunzi 4-27 chikuwonetsa piritsi la UGS-ID la chubu la N-channel, ndipo tanthauzo la UT likhoza kuwoneka bwino.
(4) Transconductance
Transconductance gm imayimira kuthekera kwa voteji yolowera pachipata cha UGS kuwongolera kukhetsa kwa ID yapano, ndiye kuti, chiŵerengero cha kusintha kwa ID yapano ya ID ndikusintha kwa voteji ya UGS. 9m ndi gawo lofunikira poyezera luso la kukulitsaMOSFET.
(5) Mphamvu yowononga magwero a madzi
Vuto la kugwetsa gwero la drainage BUDS limatanthawuza mphamvu yamagetsi yothamangitsa yomwe MOSFET ingavomereze pomwe voltage yochokera pachipata cha UGS imakhala yosasintha. Izi ndi zochepetsera, ndipo magetsi ogwiritsidwa ntchito ku MOSFET ayenera kukhala ochepa kuposa BUDS.
(6)Kutaya mphamvu kwambiri
Kuchuluka kwamphamvu kwamphamvu kwa PDSM ndikonso malire, zomwe zimatanthawuza kutayika kwamphamvu kwamagetsi komwe kumaloledwa popanda kuwonongeka kwa magwiridwe antchito a MOSFET. Akagwiritsidwa ntchito, mphamvu yeniyeni ya MOSFET iyenera kukhala yochepa kuposa PDSM ndikusiya malire ena.
(7)Kuchulukirachulukira kwa gwero la madzi
IDSM yaposachedwa ya drain-source pano ndi gawo lina la malire, lomwe limatanthawuza kuchuluka komwe kumaloledwa kudutsa pakati pa kukhetsa ndi gwero pomwe MOSFET ikugwira ntchito moyenera. Kugwira ntchito kwa MOSFET sikuyenera kupitirira IDSM.
1. MOSFET ingagwiritsidwe ntchito kukulitsa. Popeza kulowetsedwa kwa MOSFET amplifier ndikokwera kwambiri, coupling capacitor ikhoza kukhala yaying'ono ndipo ma electrolytic capacitor sayenera kugwiritsidwa ntchito.
2. Kulowetsedwa kwakukulu kwa MOSFET ndikoyenera kwambiri kusintha kwa impedance. Nthawi zambiri amagwiritsidwa ntchito pakusintha kwa impedance mu gawo lothandizira la ma multistage amplifiers.
3. MOSFET angagwiritsidwe ntchito ngati resistor variable.
4. MOSFET itha kugwiritsidwa ntchito mosavuta ngati gwero lanthawi zonse.
5. MOSFET ingagwiritsidwe ntchito ngati chosinthira chamagetsi.
MOSFET ili ndi mawonekedwe otsika otsika mkati, kupirira kwamphamvu kwambiri, kusinthasintha mwachangu, komanso mphamvu yayikulu ya avalanche. Zomwe zidapangidwa panopa ndi 1A-200A ndipo mphamvu yamagetsi ndi 30V-1200V. Titha kusintha magawo amagetsi molingana ndi magawo ogwiritsira ntchito kasitomala ndi mapulani ogwiritsira ntchito kuti apititse patsogolo kudalirika kwa Zogulitsa zamakasitomala, kusinthika kwathunthu komanso kupikisana kwamitengo yazinthu.
MOSFET vs Transistor Comparison
(1) MOSFET ndi chinthu chowongolera magetsi, pomwe transistor ndi chinthu chowongolera pano. Pamene pang'onopang'ono pakali pano amaloledwa kutengedwa kuchokera ku gwero la chizindikiro, MOSFET iyenera kugwiritsidwa ntchito; pamene mphamvu yamagetsi imakhala yochepa ndipo mphamvu zambiri zamakono zimaloledwa kutengedwa kuchokera kugwero la chizindikiro, transistor iyenera kugwiritsidwa ntchito.
(2) MOSFET imagwiritsa ntchito zonyamulira zambiri poyendetsa magetsi, motero imatchedwa chipangizo cha unipolar, pomwe ma transistors ali ndi zonyamulira zambiri komanso zonyamulira ochepa kuti aziyendetsa magetsi. Chidacho chimatchedwa kuti bipolar device.
(3) Gwero ndi kukhetsa kwa ma MOSFET ena atha kugwiritsidwa ntchito mosinthana, ndipo magetsi a pachipata amatha kukhala abwino kapena oyipa, omwe amakhala osinthika kuposa ma transistors.
(4) MOSFET imatha kugwira ntchito pansi pamikhalidwe yaying'ono komanso yotsika kwambiri yamagetsi, ndipo kupanga kwake kumatha kuphatikizira ma MOSFET ambiri pa chowotcha cha silicon. Chifukwa chake, ma MOSFET akhala akugwiritsidwa ntchito kwambiri pamabwalo akulu ophatikizika.
Momwe mungaweruzire mtundu ndi polarity ya MOSFET
Sankhani kuchuluka kwa ma multimeter kupita ku RX1K, lumikizani mayeso akuda pamtengo wa D, ndipo mayeso ofiira amatsogolera ku S pole. Gwirani mitengo ya G ndi D nthawi imodzi ndi dzanja lanu. MOSFET iyenera kukhala pamalo owongolera nthawi yomweyo, ndiye kuti, singano ya mita imasunthika pamalo olimba pang'ono. , ndiyeno gwirani mitengo ya G ndi S ndi manja anu, MOSFET sayenera kuyankha, ndiko kuti, singano ya mita sidzabwereranso ku zero. Panthawiyi, ziyenera kuganiziridwa kuti MOSFET ndi chubu chabwino.
Sankhani kuchuluka kwa ma multimeter mpaka RX1K, ndikuyesa kukana pakati pa mapini atatu a MOSFET. Ngati kukana pakati pa pini imodzi ndi zikhomo zina ziwiri ndizopanda malire, ndipo zimakhalabe zopanda malire pambuyo posinthanitsa njira zoyesera, Ndiye pini iyi ndi G pole, ndi zikhomo zina ziwiri ndi S pole ndi D pole. Kenako gwiritsani ntchito ma multimeter kuti muyeze mtengo wokana pakati pa S pole ndi D pole kamodzi, sinthanitsani njira zoyeserera ndikuyesanso. Amene ali ndi mtengo wotsutsa pang'ono ndi wakuda. Kuwongolera koyeserera kumalumikizidwa ndi S pole, ndipo chowongolera chofiira chimalumikizidwa ndi D pole.
Kuzindikira ndi kusamala kwa MOSFET
1. Gwiritsani ntchito multimeter ya pointer kuti muzindikire MOSFET
1) Gwiritsani ntchito njira yoyezera kukana kuti muzindikire ma elekitirodi amtundu wa MOSFET
Malinga ndi chodabwitsa kuti mayendedwe a kutsogolo ndi kumbuyo kwa PN mphambano ya MOSFET ndi osiyana, ma electrode atatu a MOSFET amatha kudziwika. Njira yeniyeni: Khazikitsani ma multimeter pamtundu wa R × 1k, sankhani maelekitirodi awiri aliwonse, ndikuyesa kutsogolo kwawo ndi kusintha kukana kwawo motsatira. Pamene maelekitirodi awiri ali ofanana ndi ohm zikwi zingapo, ndiye kuti ma elekitirodi awiriwo ndi D ndi gwero la S motsatira. Chifukwa pamagulu a MOSFETs, kukhetsa ndi gwero zimasinthasintha, electrode yotsalayo iyenera kukhala chipata G. Mukhozanso kukhudza chiwongolero chakuda (chofiira chofiira chimavomerezedwa) cha multimeter ku electrode iliyonse, ndipo mayesero ena amatsogolera kukhudza maelekitirodi awiri otsala motsatizana kuti muyese kukana. Pamene miyeso yotsutsa imayesedwa kawiri pafupifupi yofanana, electrode yokhudzana ndi chiwongolero chakuda ndi chipata, ndipo maelekitirodi ena awiri ndi kukhetsa ndi gwero motsatira. Ngati miyeso yotsutsa yoyesedwa kawiri ndi yayikulu kwambiri, zikutanthauza kuti ndi njira yobwerera kumbuyo kwa mphambano ya PN, ndiye kuti, onsewo ndi otsutsana. Zitha kutsimikiziridwa kuti ndi N-channel MOSFET, ndipo chiwongolero chakuda chakuda chikugwirizana ndi chipata; ngati miyeso yotsutsa yoyesedwa kawiri ndi Miyezo yotsutsa ndi yochepa kwambiri, kusonyeza kuti ndi kutsogolo kwa PN mphambano, ndiko kuti, kukana kutsogolo, ndipo kumatsimikiziridwa kukhala P-channel MOSFET. Kuwongolera kwakuda kwakuda kumalumikizidwanso pachipata. Ngati zomwe tafotokozazi sizichitika, mutha kusintha njira zoyeserera zakuda ndi zofiira ndikuyesa mayeso molingana ndi njira yomwe ili pamwambapa mpaka gululi itadziwika.
2) Gwiritsani ntchito njira yoyezera kukana kuti mudziwe mtundu wa MOSFET
Njira yoyezera kukana ndikugwiritsa ntchito multimeter kuyeza kukana pakati pa gwero ndi kukhetsa kwa MOSFET, chipata ndi gwero, chipata ndi kukhetsa, chipata cha G1 ndi chipata cha G2 kuti muwone ngati chikufanana ndi mtengo wokana womwe ukuwonetsedwa m'buku la MOSFET. Utsogoleri ndi wabwino kapena woipa. Njira yeniyeni: Choyamba, ikani ma multimeter ku R × 10 kapena R × 100 osiyanasiyana, ndikuyesa kukana pakati pa gwero S ndi kukhetsa D, nthawi zambiri mumitundu ya makumi ohms mpaka masauzande angapo ohms (imatha kuwoneka mu Buku loti machubu amitundu yosiyanasiyana, kukana kwawo ndi kosiyana), ngati kukana kwake kuli kokulirapo kuposa mtengo wamba, zitha kukhala chifukwa chosalumikizana bwino mkati; ngati kuyeza kukana mtengo ndi wopandamalire, akhoza kukhala mzati wosweka mkati. Kenaka yikani multimeter ku R × 10k, ndiyeno muyese kutsutsa pakati pa zipata G1 ndi G2, pakati pa chipata ndi gwero, ndi pakati pa chipata ndi kukhetsa. Pamene kuyeza kukana mfundo zonse zopanda malire, ndiye Zimatanthauza kuti chubu ndi yachibadwa; ngati zomwe zili pamwambazi zotsutsa ndizochepa kwambiri kapena pali njira, zikutanthauza kuti chubu ndi choipa. Tiyenera kuzindikira kuti ngati zipata ziwirizo zathyoledwa mu chubu, njira yosinthira chigawocho ingagwiritsidwe ntchito pozindikira.
3) Gwiritsani ntchito njira yolowetsa siginecha kuti muyerekeze kukweza kwa MOSFET
Njira yeniyeni: Gwiritsani ntchito mlingo wa R × 100 wa kukana kwa multimeter, gwirizanitsani kuyesa kofiira ku gwero la S, ndi kuyesa kwakuda kumatsogolera kukhetsa D. Onjezerani 1.5V magetsi opangira magetsi ku MOSFET. Panthawiyi, mtengo wotsutsa pakati pa kukhetsa ndi gwero umasonyezedwa ndi singano ya mita. Kenako kutsinani chipata G cha MOSFET ndi dzanja lanu, ndikuwonjezera chizindikiro chamagetsi cha thupi la munthu pachipata. Mwanjira iyi, chifukwa cha kukulitsa kwa chubu, voteji ya VDS ndi kukhetsa kwapano Ib idzasintha, ndiye kuti, kukana pakati pa kukhetsa ndi gwero kudzasintha. Kuchokera apa, zikhoza kuwonedwa kuti singano ya mita imasinthasintha kwambiri. Ngati singano ya singano ya gridi yogwira dzanja ikugwedezeka pang'ono, zikutanthauza kuti mphamvu yokulitsa ya chubu ndi yosauka; ngati singano ikugwedezeka kwambiri, zikutanthauza kuti mphamvu yokulitsa chubu ndi yaikulu; ngati singano sikuyenda, ndiye kuti chubu ndi choipa.
Malinga ndi njira yomwe ili pamwambayi, timagwiritsa ntchito R×100 sikelo ya multimeter kuyeza mphambano ya MOSFET 3DJ2F. Choyamba tsegulani ma elekitirodi a G a chubu ndikuyesa kukana kwa gwero la RDS kukhala 600Ω. Mukagwira G electrode ndi dzanja lanu, singano ya mita imasinthira kumanzere. Kukaniza kwa RDS ndi 12kΩ. Ngati singano ya mita ikulirakulira, ndiye kuti chubu ndichabwino. , ndipo ali ndi kuthekera kokulirapo.
Pali mfundo zingapo zomwe muyenera kuziwona mukamagwiritsa ntchito njira iyi: Choyamba, poyesa MOSFET ndikugwira chipata ndi dzanja lanu, singano ya multimeter imatha kutembenukira kumanja (kukana kumachepa) kapena kumanzere (kukana kumawonjezeka) . Izi zili choncho chifukwa chakuti magetsi a AC opangidwa ndi thupi la munthu ndi okwera kwambiri, ndipo ma MOSFET osiyanasiyana amatha kukhala ndi malo ogwirira ntchito mosiyana akayesedwa ndi kukana (mwina kumagwira ntchito m'madera odzaza kapena malo osasunthika). Mayeso awonetsa kuti RDS yamachubu ambiri imawonjezeka. Ndiko kuti, dzanja la wotchi likugwedezekera kumanzere; RDS ya machubu ochepa imachepa, zomwe zimapangitsa kuti wotchiyo igwedezeke kumanja.
Koma mosasamala kanthu za mbali imene dzanja la wotchi limagwedezera, bola ngati dzanja la wotchi likukulirakulira, zikutanthauza kuti chubucho chimakhala ndi mphamvu zokulirapo. Chachiwiri, njirayi imagwiranso ntchito kwa MOSFETs. Koma ziyenera kudziwidwa kuti kukana kolowera kwa MOSFET ndikokwera, ndipo voteji yololedwa ya chipata G sayenera kukhala yokwera kwambiri, chifukwa chake musatsine chipata ndi manja anu. Muyenera kugwiritsa ntchito insulated chogwirira cha screwdriver kukhudza chipata ndi ndodo yachitsulo. , kuletsa kuti chiwongolero chopangidwa ndi thupi la munthu chisawonjezedwe mwachindunji pachipata, kupangitsa kuti chipata chiwonongeke. Chachitatu, pambuyo pa muyeso uliwonse, mitengo ya GS iyenera kukhala yochepa. Izi zili choncho chifukwa padzakhala ndalama zochepa pa GS junction capacitor, zomwe zimamanga magetsi a VGS. Zotsatira zake, manja a mita sangasunthe poyezanso. Njira yokhayo yochotsera zolipiritsa ndikuchepetsa mtengowo pakati pa ma elekitirodi a GS.
4) Gwiritsani ntchito njira yoyezera kukana kuti muzindikire ma MOSFET osazindikirika
Choyamba, gwiritsani ntchito njira yoyezera kukana kuti mupeze zikhomo ziwiri zokhala ndi mfundo zotsutsa, zomwe zimachokera S ndi kukhetsa D. Zikhomo ziwiri zotsalira ndizo chipata choyamba G1 ndi chipata chachiwiri G2. Lembani mtengo wokana pakati pa gwero la S ndi kukhetsa D koyezedwa ndi miyeso iwiri yoyamba. Sinthani mayendedwe oyesa ndikuyesanso. Lembani mtengo woyezedwa wokana. Yemwe ali ndi mtengo wotsutsa woyezedwa kawiri ndi mayeso akuda. Elekitirodi yolumikizidwa ndi kukhetsa D; chiwongolero chofiira chofiira chikugwirizana ndi gwero la S. Mitengo ya S ndi D yomwe imadziwika ndi njirayi imathanso kutsimikiziridwa ndikuyesa kukulitsa mphamvu ya chubu. Ndiko kuti, chiwongolero choyesa chakuda chokhala ndi kuthekera kwakukulu kokulitsa chimalumikizidwa ndi mtengo wa D; chiwongolero chofiira chofiira chimalumikizidwa pansi pamtengo wa 8. Zotsatira za mayeso a njira zonsezi ziyenera kukhala zofanana. Pambuyo pozindikira malo a kukhetsa D ndi gwero la S, ikani dera lolingana ndi malo omwe ali ofanana ndi D ndi S. Kawirikawiri, G1 ndi G2 idzagwirizananso motsatizana. Izi zimatsimikizira malo a zipata ziwiri G1 ndi G2. Izi zimatsimikizira dongosolo la D, S, G1, ndi G2 pini.
5) Gwiritsani ntchito kusintha kwa mtengo wotsutsa kuti mudziwe kukula kwa transconductance
Poyesa ntchito ya transconductance ya VMOSN yowonjezera njira ya MOSFET, mungagwiritse ntchito kuyesa kofiira kuti mugwirizane ndi gwero la S ndi kuyesa kwakuda kumatsogolera ku D. Panthawi imeneyi, chipata ndi dera lotseguka, ndipo mtengo wotsutsa wa chubu ndi wosakhazikika kwambiri. Sankhani mtundu wa ohm wa ma multimeter mpaka kukana kwakukulu kwa R × 10kΩ. Panthawi imeneyi, voteji mu mita ndi apamwamba. Mukakhudza grid G ndi dzanja lanu, mudzapeza kuti mtengo wotsutsa wa chubu umasintha kwambiri. Kusintha kwakukulu, kumapangitsa mtengo wa transconductance wa chubu; ngati transconductance ya chubu yoyesedwa ndi yaying'ono kwambiri, gwiritsani ntchito njira iyi kuti muyese Pamene , kukana kumbuyo kumasintha pang'ono.
Malangizo ogwiritsira ntchito MOSFET
1) Kuti mugwiritse ntchito MOSFET mosatekeseka, malire a magawo monga mphamvu ya chubu yotayika, mphamvu yamagetsi yotulutsa madzi, mphamvu yamagetsi yamagetsi, ndi mphamvu yamagetsi sizingadutse pamapangidwe a dera.
2) Pogwiritsira ntchito mitundu yosiyanasiyana ya MOSFET, iyenera kugwirizanitsidwa ndi dera motsatira ndondomeko yoyenera, ndipo polarity ya MOSFET bias iyenera kuwonedwa. Mwachitsanzo, pali mgwirizano wa PN pakati pa gwero la chipata ndi kukhetsa kwa MOSFET, ndipo chipata cha chubu cha N-channel sichingakhale chokondera; chipata cha chubu cha P-channel sichingakhale chokondera, ndi zina zotero.
3) Chifukwa kulowetsedwa kwa MOSFET ndikokwera kwambiri, zikhomozo ziyenera kukhala zazifupi panthawi yoyendetsa ndi kusungirako, ndipo ziyenera kupakidwa ndi zotchinga zachitsulo kuti ziteteze kutheka kwakunja kuti zisawonongeke pachipata. Makamaka, chonde dziwani kuti MOSFET singayikidwe mu bokosi lapulasitiki. Ndi bwino kuzisunga mu bokosi lachitsulo. Pa nthawi yomweyo, tcherani khutu kusunga chubu chinyezi-umboni.
4) Pofuna kupewa kuwonongeka kwa chipata cha MOSFET, zida zonse zoyesera, mabenchi ogwirira ntchito, zitsulo zolumikizira, ndi mabwalo omwewo ayenera kukhala okhazikika; pamene soldering zikhomo, solder gwero choyamba; musanalumikizane ndi dera, chubu Zonse zotsogola ziyenera kukhala zazifupi kwa wina ndi mzake, ndipo zinthu zofupikitsa ziyenera kuchotsedwa mutatha kuwotcherera; pochotsa chubu ku chigawo cha chigawocho, njira zoyenera ziyenera kugwiritsidwa ntchito pofuna kuonetsetsa kuti thupi la munthu lili pansi, monga kugwiritsa ntchito mphete yoyambira; kumene, ngati patsogolo A mpweya kutentha soldering chitsulo ndi yabwino kuwotcherera MOSFETs ndi kuonetsetsa chitetezo; chubu sayenera kulowetsedwa kapena kukokera kunja kwa dera mphamvu isanazimitsidwe. Njira zachitetezo pamwambapa ziyenera kutsatiridwa mukamagwiritsa ntchito MOSFET.
5) Mukayika MOSFET, tcherani khutu ku malo osungiramo ndikuyesera kupewa kukhala pafupi ndi chinthu chotentha; pofuna kupewa kugwedezeka kwa zida za chitoliro, ndikofunikira kumangitsa chipolopolo cha chubu; pamene mapini amapindika, ayenera kukhala aakulu 5 mm kuposa kukula kwa mizu kuonetsetsa kuti Pewani kupindika mapini ndikupangitsa mpweya kutayikira.
Kwa ma MOSFET amphamvu, kutentha kwabwino kumafunika. Chifukwa ma MOSFET amphamvu amagwiritsidwa ntchito pansi pa katundu wambiri, kutentha kokwanira kumayenera kupangidwa kuti zitsimikizire kuti kutentha kwa mlandu sikudutsa mtengo wake kuti chipangizocho chizigwira ntchito mokhazikika komanso modalirika kwa nthawi yaitali.
Mwachidule, kuonetsetsa kuti ma MOSFET akugwiritsidwa ntchito motetezeka, pali zinthu zambiri zomwe muyenera kuziganizira, komanso pali njira zosiyanasiyana zotetezera. Ambiri mwa akatswiri ndi akatswiri, makamaka okonda kwambiri zamagetsi, ayenera kupitiliza kutengera momwe alili komanso kutenga njira zenizeni zogwiritsira ntchito ma MOSFET mosamala komanso moyenera.
Nthawi yotumiza: Apr-15-2024
