Bayanin kowane siga na wutar lantarki MOSFETs

VDSS Matsakaicin Matsala-Source Voltage

Tare da gajeriyar tushen ƙofar, ƙimar ƙarfin wutar lantarki (VDSS) shine matsakaicin ƙarfin lantarki wanda za'a iya amfani da shi zuwa magudanar ruwa ba tare da rushewar ƙazamar ruwa ba. Dangane da zafin jiki, ainihin ƙarfin rushewar dusar ƙanƙara na iya zama ƙasa da ƙimar VDSS. Don cikakken bayanin V(BR) DSS, duba Electrostatic

Don cikakken bayanin V(BR) DSS, duba Halayen Electrostatic.

VGS Matsakaicin Ƙofar Tushen Ƙofar

Ma'auni na ƙarfin lantarki na VGS shine matsakaicin ƙarfin lantarki wanda za'a iya amfani dashi tsakanin sandunan tushen ƙofar. Babban manufar saita wannan ƙimar ƙarfin lantarki shine don hana lalacewar gate oxide wanda ya haifar da matsanancin ƙarfin lantarki. Ainihin ƙarfin lantarki wanda oxide ɗin ƙofar zai iya jurewa yana da girma fiye da ƙimar ƙarfin lantarki, amma zai bambanta da tsarin masana'anta.

Ainihin oxide gate zai iya jure wa ƙarfin lantarki da yawa fiye da ƙimar ƙarfin lantarki, amma wannan zai bambanta da tsarin masana'anta, don haka kiyaye VGS a cikin ƙimar ƙarfin lantarki zai tabbatar da amincin aikace-aikacen.

ID - Ci gaba da Leaka na Yanzu

An ayyana ID azaman matsakaicin izinin ci gaba na DC na yanzu a matsakaicin matsakaicin zafin mahaɗa, TJ(max), da zafin saman bututu na 25°C ko mafi girma. Wannan siga aiki ne na ƙimar juriya ta zafi tsakanin mahaɗa da harka, RθJC, da yanayin yanayin:

Ba a haɗa asarar canjin canji a cikin ID ɗin kuma yana da wahala a kula da yanayin zafin bututu a 25°C (Tcase) don amfani mai amfani. Don haka, ainihin canjin halin yanzu a cikin aikace-aikacen da ke da ƙarfi yawanci ƙasa da rabin ƙimar ID @ TC = 25°C, yawanci a cikin kewayon 1/3 zuwa 1/4. m.

Bugu da ƙari, ana iya ƙididdige ID a takamaiman zafin jiki idan an yi amfani da juriya na thermal JA, wanda shine ƙarin ƙimar gaske.

IDM - Zubar da Matsala a halin yanzu

Wannan siga yana nuna adadin ɗigon halin yanzu da na'urar za ta iya ɗauka, wanda ya fi ƙarfin halin yanzu na DC. Manufar ayyana IDM shine: yankin ohmic na layi. Don takamaiman ƙarfin wutar lantarki na tushen ƙofar, daMOSFETyana gudanar da iyakar magudanar ruwa yanzu

halin yanzu. Kamar yadda aka nuna a cikin adadi, don ƙarfin wutar lantarki da aka ba da ƙofar ƙofar, idan wurin aiki yana cikin yanki mai layi, haɓakar magudanar ruwa yana haɓaka ƙarfin wutar lantarki, wanda ke ƙara yawan asarar gudanarwa. Tsawaita aiki a babban iko zai haifar da gazawar na'urar. Saboda wannan dalili

Don haka, ana buƙatar saita IDM na ƙididdiga a ƙasan yankin a daidaitattun ƙarfin tuƙi na ƙofa. Wurin yankewa na yankin yana a mahadar Vgs da lankwasa.

Don haka, ana buƙatar saita iyaka mai girma na yanzu don hana guntu daga yin zafi sosai da ƙonewa. Wannan shine ainihin don hana wuce gona da iri na halin yanzu ta hanyar jagorar kunshin, tunda a wasu lokuta "haɗin mafi rauni" akan guntu gabaɗaya ba guntu bane, amma fakitin yana jagorantar.

Yin la'akari da iyakancewar tasirin thermal akan IDM, haɓakar zafin jiki ya dogara ne akan girman bugun jini, tazarar lokaci tsakanin bugun jini, daɗaɗɗen zafi, RDS (on), da yanayin ƙaƙƙarfan ƙaƙƙarfan ƙarfi da girman halin yanzu. Kawai gamsuwa cewa bugun bugun jini bai wuce iyakar IDM ba baya bada garantin cewa zafin haɗin gwiwa

baya wuce iyakar da aka yarda da ita. Za'a iya ƙididdige zafin mahaɗin mahaɗar da ke ƙarƙashin halin yanzu ta hanyar komawa zuwa tattaunawar juriyar zafin zafi a cikin Thermal da Kayayyakin Injini.

PD - Jimlar Watsawar Wutar Tashar Mai Izinin Izinin

Jimlar Tashoshin Ƙarfin Ƙarfin Ƙarfafawa yana daidaita iyakar wutar lantarki wanda na'urar za ta iya tarwatsa kuma za'a iya bayyana shi azaman aikin matsakaicin zafin mahaɗa da juriya na zafi a yanayin zafi na 25°C.

TJ, TSTG - Aiki da Adana Yanayin Zazzabi na yanayi

Waɗannan sigogi guda biyu suna daidaita kewayon zafin mahaɗin da aka ba da izini ta wurin aiki da ma'ajiyar na'urar. An saita wannan kewayon zafin jiki don saduwa da mafi ƙarancin rayuwar aiki na na'urar. Tabbatar da cewa na'urar tana aiki a cikin wannan kewayon zafin jiki zai tsawaita rayuwarta sosai.

EAS-Single Pulse Avalanche Breakdown Energy

 

Idan wutar lantarki ta wuce gona da iri (yawanci saboda yoyon halin yanzu da karkatar da inductance) bai wuce ƙarfin rugujewar wutar lantarki ba, na'urar ba za ta fuskanci dusar ƙanƙara ba don haka ba ta buƙatar ikon watsar da dusar ƙanƙara. Ƙarfin fashewar ƙanƙara yana daidaita saurin wuce gona da iri wanda na'urar zata iya jurewa.

Ƙarfin fashewar dusar ƙanƙara yana bayyana ma'anar amintaccen ƙimar wutar lantarki mai wucewa ta wucin gadi wanda na'urar za ta iya jurewa, kuma ya dogara da adadin kuzarin da ke buƙatar tarwatsewa don faɗuwar dusar ƙanƙara.

Na'urar da ke ba da ma'anar ma'aunin kuzarin rugujewar dusar ƙanƙara yawanci kuma tana bayyana ƙimar EAS, wanda yayi kama da ma'ana da ƙimar UIS, kuma yana bayyana adadin ƙarfin rushewar dusar ƙanƙara da na'urar zata iya ɗauka cikin aminci.

L shine ƙimar inductance kuma iD shine mafi girman halin yanzu da ke gudana a cikin inductor, wanda aka canza da sauri zuwa magudanar ruwa a cikin na'urar aunawa. Wutar lantarkin da aka samar a fadin inductor ya zarce karfin rushewar MOSFET kuma zai haifar da rushewar dusar ƙanƙara. Lokacin da bala'in bala'i ya faru, na yanzu a cikin inductor zai gudana ta na'urar MOSFET ko da yakeMOSFETya kashe. Ƙarfin da aka adana a cikin inductor yayi kama da makamashin da aka adana a cikin inductor wanda ya ɓace kuma MOSFET ya watsar da shi.

Lokacin da MOSFETs aka haɗa a layi daya, raguwar ƙarfin lantarki ba su da kamanni tsakanin na'urori. Abin da yakan faru shine na'ura ɗaya ita ce ta farko da ta fara samun rugujewar dusar ƙanƙara kuma duk guguwar rushewar ƙazamar ruwa (makamashi) na biyowa ta cikin waccan na'urar.

EAR - Makamar Maimaita Avalanche

Ƙarfin wutar lantarki mai maimaitawa ya zama "ma'auni na masana'antu", amma ba tare da saita mita ba, sauran asara da adadin sanyaya, wannan siga ba shi da ma'ana. Yanayin ɓarkewar zafi (sanyi) sau da yawa yana sarrafa maimaituwar makamashin kankara. Hakanan yana da wahala a iya hasashen matakin makamashin da ke haifarwa ta hanyar rushewar dusar ƙanƙara.

Hakanan yana da wahala a iya hasashen matakin makamashin da ke haifarwa ta hanyar rushewar dusar ƙanƙara.

Haƙiƙanin ma'anar ƙimar EAR shine daidaita yawan kuzarin rushewar dusar ƙanƙara da na'urar zata iya jurewa. Wannan ma'anar tana tsammanin cewa babu iyaka akan mita don kada na'urar ta yi zafi sosai, wanda yake da gaske ga kowace na'ura inda bala'in balaguro zai iya faruwa.

Yana da kyau a auna zafin na'urar da ke aiki ko kuma wurin da ke da zafi don ganin ko na'urar MOSFET tana yin zafi sosai yayin da ake tantance ƙirar na'urar, musamman ga na'urorin da ke da yuwuwar fashewar dusar ƙanƙara.

IAR - Rushewar Avalanche Yanzu

Ga wasu na'urori, yanayin saiti na yanzu akan guntu yayin rushewar dusar ƙanƙara yana buƙatar iyakance IAR na yanzu. Ta wannan hanyar, dusar ƙanƙara ta zama "kyakkyawan bugu" na ƙayyadaddun makamashi na rushewar dusar ƙanƙara; yana bayyana ainihin iyawar na'urar.

Kashi na II Tsayayyen Halin Wutar Lantarki

V(BR) DSS: Magudanar ruwa-Source Breakdown Voltage (Lalacewar Wutar Lantarki)

V(BR) DSS (wani lokaci ana kiransa VBDSS) ita ce wutar lantarki ta magudanar ruwa wanda halin yanzu da ke gudana ta magudanar ya kai wani takamaiman ƙima a takamaiman zafin jiki kuma tare da gajeriyar hanyar ƙofar. Wutar wutar lantarki ta tushen magudanar ruwa a cikin wannan yanayin ita ce ƙarfin rugujewar dusar ƙanƙara.

V(BR) DSS tabbataccen madaidaicin zafin jiki ne, kuma a ƙananan zafin jiki V(BR) DSS bai kai matsakaicin ƙimar ƙarfin magudanar ruwa a 25°C. A -50°C, V(BR) DSS bai kai madaidaicin ƙimar ƙarfin magudanar ruwa a -50°C. A -50°C, V(BR) DSS shine kusan 90% na matsakaicin ƙimar ƙarfin magudanar ruwa a 25°C.

VGS(th), VGS(kashe): Wutar lantarki

VGS(th) ita ce irin ƙarfin lantarki wanda ƙarar tushen ƙarfin ƙofar ƙofar zai iya sa magudanar ta fara samun halin yanzu, ko kuma na yanzu ya ɓace lokacin da MOSFET ta kashe, da kuma yanayin gwaji (magudanar ruwa, ƙarfin magudanar ruwa, junction). zafin jiki) kuma an ƙayyade. Yawanci, duk na'urorin ƙofar MOS suna da bambanci

Ƙarfin wutar lantarki zai bambanta. Don haka, an ƙayyade kewayon bambancin VGS (th).MOSFETzai kunna a ƙaramin ƙarfin tushen ƙofar ƙofar.

RDS(a kunne): Kan-juriya

RDS(on) shine juriyar magudanar ruwa da aka auna a takamaiman magudanar ruwa (yawanci rabin ID na halin yanzu), ƙarfin tushen ƙofar, da 25°C. RDS(on) shine juriyar magudanar ruwa da aka auna a takamaiman magudanar ruwa (yawanci rabin ID na yanzu), ƙarfin tushen ƙofar, da 25°C.

IDSS: sifili kofa irin ƙarfin lantarki lambatu halin yanzu

IDSS shine ɗigogi na halin yanzu tsakanin magudanar ruwa da tushe a takamaiman ƙarfin magudanar ruwa lokacin da ƙarfin tushen ƙofar ya zama sifili. Tun da yayyo halin yanzu yana ƙaruwa tare da zafin jiki, an ƙayyade IDSS a duka ɗaki da yanayin zafi. Ana iya ƙididdige ɓarnawar wutar lantarki saboda halin yanzu ta hanyar ninka IDSS ta ƙarfin lantarki tsakanin magudanar ruwa, wanda yawanci ba shi da kyau.

IGSS - Ƙofar Tushen Ƙofar Yanzu

IGSS shine ɗigogi na halin yanzu da ke gudana ta ƙofar a takamaiman ƙarfin tushen ƙofar.

Kashi na III Halayen Wutar Lantarki Mai Sauƙi

Ciss : iyawar shigarwa

Ƙarfin da ke tsakanin ƙofar da tushen, wanda aka auna tare da siginar AC ta hanyar rage magudanar ruwa zuwa tushen, shine ƙarfin shigarwa; Ciss yana samuwa ta hanyar haɗa ƙarfin magudanar ruwa, Cgd, da ƙarfin tushen ƙofar, Cgs, a layi daya, ko Ciss = Cgs + Cgd. Ana kunna na'urar lokacin da aka caji ƙarfin shigarwar zuwa ƙarfin wutan kofa, kuma ana kashe ta lokacin da aka fitar da ita zuwa takamaiman ƙima. Saboda haka, da'irar direba da Ciss suna da tasiri kai tsaye akan kunnawa da jinkirin kashe na'urar.

Coss: iyawar fitarwa

Ƙarfin fitarwa shine ƙarfin da ke tsakanin magudanar ruwa da tushen da aka auna tare da siginar AC lokacin da aka gajarta tushen ƙofar, Coss yana samuwa ta hanyar daidaita magudanar ruwa-source Cds da magudanar ruwa Cgd, ko Coss = Cds + Cgd. Don aikace-aikacen masu sauyawa mai laushi, Coss yana da matukar mahimmanci saboda yana iya haifar da resonance a cikin kewaye.

Crss: Ƙarfin Canja wurin Juya

Matsakaicin ƙarfin da aka auna tsakanin magudanar ruwa da ƙofar tare da tushen tushe shine ƙarfin canja wuri na baya. Matsakaicin ƙarfin canja wuri yana daidai da ƙarfin magudanar ruwa, Cres = Cgd, kuma galibi ana kiransa da ƙarfin Miller, wanda shine ɗayan mahimman sigogin lokacin tashi da faɗuwar canji.

Yana da mahimmancin ma'auni don lokutan sauyawa da lokutan faɗuwa, kuma yana rinjayar lokacin jinkirin kashewa. Capacitance yana raguwa yayin da magudanar wutar lantarki ke ƙaruwa, musamman ƙarfin fitarwa da ƙarfin canja wuri na baya.

Qgs, Qgd, da Qg: Cajin Ƙofar

Ƙimar cajin ƙofar yana nuna cajin da aka adana akan capacitor tsakanin tashoshi. Tun da cajin da ke kan capacitor yana canzawa tare da ƙarfin lantarki a nan take na sauyawa, ana la'akari da tasirin cajin ƙofar yayin zayyana da'irar direban ƙofar.

Qgs shine cajin daga 0 zuwa madaidaicin juzu'i na farko, Qgd shine kashi daga farkon zuwa na biyu (wanda ake kira cajin "Miller"), kuma Qg shine kashi daga 0 zuwa wurin da VGS yayi daidai da takamaiman tuƙi. ƙarfin lantarki.

Canje-canje a cikin yoyon halin yanzu da ƙarfin wutar lantarki na tushen yayyo suna da ɗan ƙaramin tasiri akan ƙimar cajin ƙofar, kuma cajin ƙofar ba ya canzawa da zafin jiki. An ƙayyade yanayin gwajin. Ana nuna jadawali na cajin ƙofa a cikin takardar bayanan, gami da madaidaicin madaidaicin cajin ƙofa don ƙayyadaddun ɗigogi na halin yanzu da bambancin wutar lantarki na tushen ɗigo.

Matsakaicin madaidaicin cajin ƙofa don ƙayyadaddun magudanar ruwa na yanzu da bambancin ƙarfin magudanar ruwa ana haɗa su cikin takaddun bayanai. A cikin jadawali, ƙarfin lantarki na plateau VGS(pl) yana ƙaruwa kaɗan tare da haɓaka halin yanzu (kuma yana raguwa tare da raguwar halin yanzu). Wutar lantarkin plateau shima yayi daidai da ƙarfin wutan kofa, don haka ƙarfin wutar lantarki daban zai haifar da wani nau'in wutar lantarki daban.

ƙarfin lantarki.

Zane mai zuwa ya fi dalla-dalla kuma ana amfani da shi:

td (a kunne): lokacin jinkiri akan lokaci

Lokacin jinkiri akan lokaci shine lokacin daga lokacin da ƙarfin tushen ƙofar ƙofar ya tashi zuwa 10% na ƙarfin motar ƙofar zuwa lokacin da yayyo na yanzu ya tashi zuwa 10% na ƙayyadaddun halin yanzu.

td(kashe): Kashe lokacin jinkiri

Lokacin jinkirin kashewa shine lokacin da ya wuce daga lokacin da ƙarfin wutar lantarkin ƙofar ƙofar ya ragu zuwa kashi 90% na ƙarfin wutar lantarki zuwa lokacin da yayyo na yanzu ya faɗi zuwa 90% na ƙayyadaddun halin yanzu. Wannan yana nuna jinkirin da aka samu kafin a canza na yanzu zuwa kaya.

tr: Lokacin tashi

Lokacin tashi shine lokacin da ake ɗaukar magudanar ruwa don tashi daga 10% zuwa 90%.

tf: lokacin faduwa

Lokacin faɗuwar shine lokacin da ake ɗaukar magudanar ruwa don faɗuwa daga 90% zuwa 10%.