I-Mastering MOSFET njengoshintsho: Gcwalisa Umhlahlandlela Wokusebenzisa Wamandla Kagesi

Ukubuka konke okusheshayo:Lo mhlahlandlela ophelele uhlola indlela yokusebenzisa ngempumelelo ama-MOSFET njengamaswishi ezinhlelweni zikagesi, kugxilwe ekusetshenzisweni okungokoqobo nezisombululo zomhlaba wangempela.

Ukuqonda Okuyisisekelo Sokushintsha kwe-MOSFET

I-Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs) iguqule izinto zikagesi zesimanje ngokuhlinzeka ngesixazululo esisebenzayo nesithembekile sokushintshwa. Njengomhlinzeki oholayo wama-MOSFET ekhwalithi ephezulu, sizokuqondisa kukho konke odinga ukukwazi mayelana nokusebenzisa lezi zingxenye ezihlukahlukene njengamaswishi.

Izimiso Zokusebenza Eziyisisekelo

Ama-MOSFET asebenza njengama-switch alawulwa yi-voltage, anikeza izinzuzo ezimbalwa ngaphezu kokushintsha kwemishini yendabuko namanye amadivaysi e-semiconductor:

Isivinini sokushintsha ngokushesha (ububanzi be-nanosecond)
Ukumelana nesifunda okuphansi (i-RDS(ivuliwe))
Ukusetshenziswa kwamandla okuncane ezifundeni ezimile
Akukho ukuguga nokuklebhuka komshini

Xhumana nathi nge-MOSFET Solutions

I-MOSFET Shintsha Izindlela Zokusebenza Nezici

Izifunda Eziyinhloko Zokusebenza

Isifunda sokusebenza	Isimo se-VGS	Ukushintsha isimo	Isicelo
Isifunda Esinqunyiwe	I-VGS <VTH	OFF State	Vula ukusebenza kwesekethe
I-Linear/Triode Region	VGS > VTH	ON State	Ishintsha izinhlelo zokusebenza
Isifunda Sokugcwalisa	VGS >> VTH	Kuthuthukiswe Ngokugcwele	Isimo sokushintshwa esilungile

Amapharamitha Abalulekile Wokushintsha Izicelo

I-RDS(ivuliwe):Ukumelana nomthombo we-drain-state
I-VGS(th):I-voltage yesango
I-ID(ubuningi):Umkhawulo wamanje wokudonsa
I-VDS(ubukhulu):I-voltage ephezulu yomthombo wokukhipha amanzi

Iziqondiso Ezisebenzayo Zokusebenzisa

Izidingo ze-Gate Drive

Ukushayela isango ngendlela efanele kubalulekile ekusebenzeni kahle kokushintsha kwe-MOSFET. Cabangela lezi zici ezibalulekile:

Izidingo zamandla kagesi wesango (imvamisa i-10-12V ukuze ithuthukiswe ngokugcwele)
Izici zokushajwa kwesango
Ukushintsha izidingo zesivinini
Ukukhetha ukumelana nesango

Izifunda Zokuvikela

Sebenzisa lezi zinyathelo zokuvikela ukuze uqinisekise ukusebenza okuthembekile:

Ukuvikelwa komthombo wesango
- I-Zener diode yokuvikela i-overvoltage
- Ukumelana nesango lokukhawula kwamanje
Ukuvikelwa komthombo wamapayipi
- Amasekhethi e-snubber ama-voltage spikes
- I-Freewheeling diode yemithwalo ye-inductive

Phequlula Ukukhethwa Kwethu kwe-MOSFET

Ukucatshangelwa okuqondene nohlelo lokusebenza

Izicelo Zokuphakela Amandla

Kumandla kagesi wemodi yokushintsha (i-SMPS), ama-MOSFET asebenza njengezinto eziyinhloko zokushintsha. Okucatshangelwayo okubalulekile kuhlanganisa:

Ikhono lokusebenza le-high-frequency
I-RDS ephansi (ivuliwe) ukuze kuthuthukiswe ukusebenza kahle
Izici zokushintsha ngokushesha
Izidingo zokuphatha ezishisayo

Izicelo Zokulawula Izimoto

Ngezicelo zokushayela imoto, cabangela lezi zici:

Ikhono lokuphatha lamanje
Ukuvikela i-voltage ehlehlayo
Izidingo zokushintsha imvamisa
Ukucatshangelwa kokukhishwa kokushisa

Ukuxazulula izinkinga kanye Nokuthuthukisa Ukusebenza

Izinkinga Ezivamile Nezixazululo

Inkinga	Izimbangela Ezingenzeka	Izixazululo
Ukulahlekelwa okuphezulu kokushintsha	Ukungena kwesango okunganele, ukwakheka okubi	Lungiselela isango lokushayela, thuthukisa isakhiwo se-PCB
Ama-oscillations	I-Parasitic inductance, ukumanzisa okunganele	Engeza ukumelana kwesango, sebenzisa ama-circuits e-snubber
Ukubaleka okushisayo	Ukupholisa okunganele, imvamisa yokushintsha kakhulu	Thuthukisa ukuphathwa okushisayo, unciphise imvamisa yokushintsha

Amathiphu Okuthuthukisa Ukusebenza

Lungiselela isakhiwo se-PCB ukuze uthole imiphumela emincane ye-parasitic
Khetha i-gate drive circuitry efanele
Sebenzisa ukuphatha okushisayo okusebenzayo
Sebenzisa amasekhethi okuvikela afanele

Kungani Khetha ama-MOSFET ethu?

Imininingwane ye-RDS(on) ehamba phambili embonini
Ukusekelwa okuphelele kobuchwepheshe
Uchungechunge lokunikezela oluthembekile
Amanani okuncintisana

Cela I-Quote Manje

Amathrendi Nentuthuko Yekusasa

Hlala uphambi kwejika ngalobu buchwepheshe obuvelayo be-MOSFET:

Ama-semiconductors e-bandgap ebanzi (SiC, GaN)
Ubuchwepheshe bokupakisha obusezingeni eliphezulu
Izixazululo zokuphatha ezishisayo ezithuthukisiwe
Ukuhlanganiswa namasekhethi okushayela ahlakaniphile

Udinga Isiqondiso Sochwepheshe?

Ithimba lethu lochwepheshe likulungele ukukusiza ukuthi ukhethe isixazululo esiphelele se-MOSFET sohlelo lwakho lokusebenza. Xhumana nathi ukuze uthole usizo lomuntu siqu kanye nokwesekwa kobuchwepheshe.

Xhumana Nethimba Lethu Lobuchwepheshe