Waa maxay sababaha keenaya kuleyliyaha MOSFET beddelka?

MOSFET-ga rogasha waxa ay ku shaqeysaa xaalad beddelasho waxaana hadda socda MOSFET waa mid aad u sarreeya. Haddii MOSFET aan si sax ah loo dooran, baaxadda korantada wadista kuma filna ama kala daadsanaanta kulaylka wareeggu ma fiicna, waxay keeni kartaa MOSFET inay kululaato.

 

1, inverter MOSFET kululaynta waa halis, waa in fiiro gaar ah uMOSFETxulashada

MOSFET inverter ee gobolka beddelka, guud ahaan waxay u baahan tahay qulqulka qulqulka hadda sida ugu badan ee suurtogalka ah, iska caabbinta sida ugu yar ee suurtogalka ah, si aad u yarayn karto dhibicda korantada ee MOSFET, taas oo yaraynaysa MOSFET tan iyo isticmaalka, hoos u dhig kulaylka.

Fiiri buug-gacmeedka MOSFET, waxaan ogaan doonaa in mar kasta oo MOSFET ay kor u kacdo qiimaha iska caabbinta ee MOSFET, ay sii badanayso iska caabbinta, iyo kuwa leh hadda biya-baxa sarreeya, qiimaha korantada hooseeya ee MOSFET, iska caabinteeda guud ahaan waxa ay ka hooseysaa tobanaan millihms.

Iyadoo loo maleynayo in culeyska hadda ee 5A, waxaan dooraneynaa inverter-ka sida caadiga ah loo isticmaalo MOSFETRU75N08R oo u adkaysta qiimaha korantada ee 500V 840 waxay noqon kartaa, qulqulkooda hadda waa 5A ama in ka badan, laakiin iska caabinta labada MOSFET waa kala duwan yihiin, ku wado isla hadda. , Kala duwanaanshahooda kulaylkoodu aad buu u weyn yahay. 75N08R iska caabbinta kaliya waa 0.008Ω, halka iska caabbinta 840 iska caabbinta 75N08R ay tahay kaliya 0.008Ω, halka iska caabbinta 840 ay tahay 0.85Ω. Marka culeyska hadda socda MOSFET uu yahay 5A, hoos u dhaca danab 75N08R ee MOSFET waa 0.04V oo keliya, isticmaalka MOSFET ee MOSFET waa 0.2W oo keliya, halka hoos u dhaca danab ee 840's MOSFET uu noqon karo ilaa 4.25W, iyo isticmaalka MOSFET waa mid aad u sarreeya ilaa 21.25W. Taas, waxaa laga dheehan karaa in iska caabbinta MOSFET ay ka duwan tahay iska caabbinta 75N08R, kulaylkooduna uu aad uga duwan yahay. Inta yar ee iska caabbinta MOSFET, ayaa ka sii wanagsan, iska caabbinta MOSFET, tuubada MOSFET ee ku hoos jirta isticmaalka sare ee isticmaalka hadda waa mid aad u weyn.

 

2, wareegga wadista ee baaxadda danab wadista ma aha mid ku filan

MOSFET waa aalad kontorool koronto, haddii aad rabto in aad yareyso isticmaalka tuubada MOSFET, yareyso kulaylka, MOSFET gate drive baaxadda korantada waa in ay ahaataa mid weyn oo ku filan, u wad garaaca garaaca garaaca, hoos u dhigi kartaaMOSFEThoos u dhaca danabka tuubada, hoos u dhigi isticmaalka tuubada MOSFET.

 

3, MOSFET kuleylka kulaylka ma aha sabab wanaagsan

Kuleyliyaha MOSFET beddelka waa halis. Maaddaama isticmaalka tuubada MOSFET rogasha uu weyn yahay, shaqadu guud ahaan waxay u baahan tahay meel bannaan oo ku filan oo ku filan weelka kulaylka, iyo weelka kulaylka dibadda iyo MOSFET lafteeda inta u dhaxaysa weelka kulaylka waa in ay noqdaan kuwo xiriir dhow la leh dufan silikoon), haddii weelka kulaylka dibadda uu ka yar yahay, ama MOSFET lafteedu aysan ku dhowayn xidhiidhka saxanka kulaylka, waxay u horseedi kartaa MOSFET kuleyl.

Inverter MOSFET kululaynta halis ah waxaa jira afar sababood oo kooban.

Kuleyl yar MOSFET waa dhacdo caadi ah, laakiin kuleyliyuhu waa halis, oo xitaa horseedda MOSFET waa gubatay, waxaa jira afar sababood oo soo socda:

 

1, dhibaatada naqshadeynta wareegga

MOSFET ha ku shaqeyso qaab hawleed toosan, halkii ay ka ahaan lahayd wareegga wareegga wareegga. Sidoo kale waa mid ka mid ah sababaha MOSFET kulaylinta. Haddii N-MOS ay samaynayso beddelka, korantada heerka G-gu waa in ay ahaataa dhowr V ka sarreeya sahayda korontada si ay si buuxda u shido, halka P-MOS ay ka soo horjeedaan. Aan si buuxda u furnayn oo hoos u dhaca danabku aad buu u weyn yahay taas oo keentay isticmaalka korantada, isugeynta DC ee u dhiganta ayaa ka weyn, hoos u dhaca danabku wuu kordhiyaa, sidaas darteed U * I sidoo kale wuu kordhiyaa, luminta macnaheedu waa kulayl. Tani waa qaladka ugu badan ee laga fogaado ee naqshadeynta wareegga.

 

2, soo noqnoqosho aad u sarreeya

Sababta ugu weyn ayaa ah in mararka qaarkood daba-galka xad-dhaafka ah ee mugga, taasoo keentay soo noqnoqoshada korodhka,MOSFETkhasaaraha weyn, sidaas darteed kulaylku sidoo kale waa la kordhiyaa.

 

3, oo aan ku filnayn naqshad kuleyl

Haddii hadda uu aad u sarreeyo, qiimaha hadda jira ee MOSFET, badanaa wuxuu u baahan yahay kuleyl wanaagsan si loo gaaro. Markaa aqoonsigu wuu ka yar yahay kan hadda ugu sarreeya, waxa kale oo laga yaabaa inuu si xun u kululaado, wuxuu u baahan yahay weel kuleyl ah oo ku filan.

 

4, xulashada MOSFET waa khalad

Xukunka khaldan ee awoodda, MOSFET iska caabin gudaha ah si buuxda looma tixgalin, taasoo keentay kororka is beddelka.