Munguva ichangopfuura, kana vatengi vazhinji vachiuya kuOlukey kuzobvunza nezveMOSFETs, ivo vanobvunza mubvunzo, nzira yekusarudza yakakodzera MOSFET? Nezvemubvunzo uyu, Olukey anoupindura kune wese munhu.
Chekutanga pane zvese, isu tinofanirwa kunzwisisa musimboti weMOSFET. Iwo mameseji eMOSFET anounzwa zvakadzama muchinyorwa chakapfuura "Chii chinonzi MOS Field Effect Transistor". Kana iwe usati wanyatsojeka, unogona kudzidza nezvazvo kutanga. Zvichitaurwa zviri nyore, MOSFET ndeyeVoltage-inodzorwa semiconductor zvikamu zvine zvakanakira zvekupokana kwepamusoro, ruzha rushoma, kushandiswa kwesimba rakaderera, hombe ine simba, kubatanidza kuri nyore, hapana kuparara kwechipiri, uye yakakura yakachengeteka inoshanda renji.
Saka, tinofanira kusarudza sei zvakaruramaMOSFET?
1. Sarudza kana uchishandisa N-channel kana P-channel MOSFET
Chekutanga, tinofanira kutanga taziva kuti toshandisa N-channel kana P-channel MOSFET, sezvaratidzwa pazasi:
Sezvinoonekwa kubva pamufananidzo uri pamusoro, pane misiyano iri pachena pakati peN-channel neP-channel MOSFETs. Semuenzaniso, kana MOSFET yakadzikwa uye mutoro wakabatanidzwa kune voltage yebazi, MOSFET inoumba yakakwira-voltage side switch. Panguva ino, N-chiteshi MOSFET inofanira kushandiswa. Sezvineiwo, kana MOSFET yakabatana nebhazi uye mutoro wakadzikwa, switch-side switch inoshandiswa. P-channel MOSFETs anowanzo shandiswa mune imwe topology, izvo zvakare nekuda kwekufunga kwevoltage drive.
2. Yakawedzera voltage uye yakawedzera ikozvino yeMOSFET
(1). Sarudza iyo yekuwedzera voltage inodiwa neMOSFET
Chechipiri, isu tinozoenderera mberi nekuona iyo yekuwedzera voltage inodiwa kune voltage drive, kana iyo yakanyanya voltage iyo mudziyo unogona kugamuchira. Iyo yakakura iyo yakawedzera voltage yeMOSFET. Izvi zvinoreva kuti hukuru hweMOSFETVDS hunodiwa hunoda kusarudzwa, zvinonyanya kukosha kuita zviyero zvakasiyana uye sarudzo zvichienderana nehuwandu hwemhepo inogona kugamuchirwa neMOSFET. Ehe, kazhinji, midziyo inotakurika ndeye 20V, FPGA magetsi i20~30V, uye 85~220VAC i450~600V. Iyo MOSFET inogadzirwa neWINSOK ine yakasimba voltage kuramba uye huwandu hwakawanda hwekushandisa, uye inofarirwa neruzhinji rwevashandisi. Kana uine chero zvaunoda, ndapota taura neinternet service customer service.
(2) Sarudza iyo yekuwedzera ikozvino inodiwa neMOSFET
Kana iwo akatemerwa voltage mamiriro asarudzwa zvakare, zvinodikanwa kuti uone yakayerwa ikozvino inodiwa neMOSFET. Iyo inonzi yakayerwa ikozvino ndiyo chaiyo yakanyanya ikozvino iyo iyo MOS mutoro inogona kumira mune chero mamiriro ezvinhu. Zvakafanana nemamiriro emagetsi, ita shuwa kuti MOSFET yaunosarudza inokwanisa kubata imwe huwandu hwekuwedzera ikozvino, kunyangwe iyo system inogadzira maspikes aripo. Mamiriro maviri azvino ekufunga nezvawo maitiro anoenderera uye pulse spikes. Mukuenderera mberi kwekuita modhi, iyo MOSFET iri munzvimbo yakatsiga, kana yazvino ichiramba ichiyerera nemuchina. Pulse spike inoreva hushoma hwekuvhiya (kana peak ikozvino) inoyerera nemumudziyo. Kana iyo yakanyanya ikozvino munharaunda yakatemwa, iwe unongoda kusarudza zvakananga mudziyo unokwanisa kumirisana nehumwe huwandu hwazvino.
Mushure mekusarudza iyo yekuwedzera ikozvino, conduction kushandiswa kunofanirwawo kutariswa. Mumamiriro ezvinhu chaiwo, MOSFET haisi mudziyo chaiwo nekuti kinetic simba rinodyiwa panguva yekupisa conduction process, iyo inonzi conduction kurasikirwa. Kana iyo MOSFET iri "pa", inoita senge inochinjika resistor, iyo inotemerwa neiyo RDS (ON) yechishandiso uye inochinja zvakanyanya nechiyero. Iko kushandiswa kwesimba kwemuchina kunogona kuverengerwa neIload2 × RDS (ON). Sezvo kudzoka kuramba kunoshanduka nechiyero, kushandiswa kwesimba kuchachinjawo maererano. Iyo yakakwirira iyo VGS yakashandiswa kune MOSFET, iyo idiki iyo RDS (ON) ichave; ukuwo, iyo yakakwirira iyo RDS(ON) ichave. Ziva kuti iyo RDS(ON) kuramba inodzikira zvishoma neyazvino. Shanduko dzeboka rega rega remagetsi paramita yeRDS (ON) resistor inogona kuwanikwa mune yemugadziri yekusarudza chigadzirwa tafura.
3. Sarudza zvinodiwa zvekutonhora zvinodiwa nehurongwa
Mamiriro anotevera anozotongwa ndeyekupisa kupisa zvinodiwa nehurongwa. Muchiitiko ichi, mamiriro maviri akafanana anofanirwa kutariswa, iyo yakaipisisa uye mamiriro chaiwo.
Nezve MOSFET kupisa kupisa,Olukeyinotungamira mhinduro kune yakaipisisa-mamiriro ezvinhu, nekuti imwe mhedzisiro inoda yakakura inishuwarenzi margin kuti ive nechokwadi chekuti hurongwa hahukundike. Pane imwe data yekuyera inoda kutariswa pane MOSFET data sheet; iyo junction tembiricha yemudziyo yakaenzana neyakakura yemamiriro kuyerwa pamwe nechigadzirwa chekupisa kupisa uye kupera simba (junction tembiricha = yakanyanya mamiriro kuyerwa + [thermal resistance × power dissipation]). Iyo yakanyanya simba yekuparara kwehurongwa inogona kugadziriswa maererano neimwe fomula, iyo yakafanana neI2 × RDS (ON) netsanangudzo. Isu takatoverengera huwandu hwazvino huchapfuura nemumudziyo uye tinogona kuverenga RDS (ON) pasi pezviyero zvakasiyana. Mukuwedzera, kupisa kwekupisa kwebhodhi redunhu uye MOSFET yayo inofanira kutarisirwa.
Avalanche breakdown zvinoreva kuti reverse voltage pane semi-superconducting component inodarika kukosha kwepamusoro uye inoumba simba remagineti rinowedzera ikozvino muchikamu. Kuwedzera kwehukuru chip kuchavandudza kugona kudzivirira kudonha kwemhepo uye pakupedzisira kugadzirisa kugadzikana kwemuchina. Naizvozvo, kusarudza pasuru yakakura kunogona kudzivirira zvinorova mafungu.
4. Sarudza kuchinja kwekuita kweMOSFET
Mamiriro ekupedzisira ekutonga ndeyekuchinja kwekuita kweMOSFET. Pane zvinhu zvakawanda zvinokanganisa kuchinja kwekuita kweMOSFET. Iwo akanyanya kukosha ndiwo matatu paramita e electrode-drain, electrode-source uye drain-source. Iyo capacitor inobhadharwa pese painochinja, zvinoreva kuti kuchinja kurasikirwa kunoitika mune capacitor. Naizvozvo, iyo yekumhanyisa yekumhanyisa yeMOSFET inodzikira, nekudaro ichikanganisa kushanda kwemudziyo. Naizvozvo, pakusarudza MOSFET, zvinodikanwa zvakare kutonga uye kuverenga kurasikirwa kwese kwechigadzirwa panguva yekuchinja. Izvo zvinodiwa kuverenga kurasikirwa panguva yekutendeuka-on process (Eon) uye kurasikirwa panguva yekudzima. (Eoff). Simba rose rekuchinja kweMOSFET rinogona kuratidzwa neinotevera equation: Psw = (Eon + Eoff) × switching frequency. Iyo gedhi yekuchaja (Qgd) ine yakanyanya kukanganisa pakuchinja kuita.
Kupfupisa, kusarudza iyo MOSFET yakakodzera, mutongo unoenderana unofanirwa kuitwa kubva kuzvinhu zvina: iyo yakawedzera voltage uye yakawedzera ikozvino yeN-channel MOSFET kana P-channel MOSFET, izvo zvinodikanwa zvekubvisa kupisa kweiyo mudziyo system uye nekuchinja kwekuita kwe. MOSFET.
Ndizvo zvese zvanhasi pane nzira yekusarudza iyo MOSFET chaiyo. Ndinovimba inogona kukubatsira.
Nguva yekutumira: Zvita-12-2023
