Ukulawula i-MosFET Body Diode yaMandla: Amaqhinga okunciphisa ilahleko kunye nokuphucula ukusebenza kakuhle

I-Metal-oxide-semiconductor field-effect transistors (MOSFETs) iye yaliguqula ishishini le-electronics, yaba ngamacandelo akhoyo kuluhlu olubanzi lweesekethe. Ngelixa umsebenzi wazo ophambili ikukulawula kunye nokwandisa iisignali zombane, ii-MOSFETs zikwanayo neyona nto isoloko ingahoywa kodwa ibalulekile: i-diode yomzimba wangaphakathi. Esi sithuba sebhlog sigocagoca kubugocigoci be-MOSFET body diode, sijonga amaqhinga okunciphisa ilahleko yabo kunye nokuphucula ukusebenza kakuhle kwesekethe.

Ukuqonda Ilahleko yeDiode yoMzimba weMOSFET

I-diode yomzimba, i-parasitic junction yendalo ngaphakathi kolwakhiwo lwe-MOSFET, ibonisa ukuhamba ngokungafaniyo, evumela ukuba kudlule umbane ukusuka kumjelo ukuya kumthombo kodwa kungabi ngenye indlela. Ngelixa isebenzela iinjongo ezixabisekileyo, i-diode yomzimba inokwazisa ukulahlekelwa kwamandla okunciphisa ukusebenza kwesekethe.

Iilahleko zokuqhuba: Ngexesha le-MOSFET eku-state, i-diode yomzimba iqhuba ngoku kwicala elingasemva, ivelisa ubushushu kunye namandla okuchitha.

Ukutshintsha Ukulahleka: Ngexesha lokutshintsha kwe-MOSFET, i-diode yomzimba iqhuba okwangoku ngexesha lokubuyisela umva, ekhokelela ekutshintsheni ilahleko.

Amacebo okuNciphisa ilahleko yeDiode yoMzimba weMOSFET

Ukukhetha ii-MOSFET ezifanelekileyo: Khetha ii-MOSFET ezinevoltage esezantsi yediode eya phambili kunye nexesha lokubuyisela umva ukuze kuncitshiswe ilahleko yokuqhuba kunye nokutshintsha ngokulandelelanayo.

Ukuphucula Iimpawu zokuqhuba: Sebenzisa izibonakaliso ezifanelekileyo zokuqhuba isango ukuze unciphise ixesha eliqhuba i-diode yomzimba ngexesha lokutshintsha, ukunciphisa ilahleko yokutshintsha.

Ukusebenzisa iiSekethe ze-Snubber: Ukuphumeza iisekethe ze-snubber, ezibandakanya i-resistors kunye ne-capacitors, ukutshabalalisa amandla agcinwe kwii-parasitic inductances kunye nokunciphisa i-voltage spikes, ukunciphisa ilahleko yokutshintsha.

I-Parallel Body Diodes: Cinga ngokuhambelana kweediode zangaphandle kunye ne-diode yomzimba ukwabelana ngoku kunye nokunciphisa ukuchithwa kwamandla, ngokukodwa kwizicelo eziphezulu zangoku.

Uyilo olulolunye lweSekethe: Kwezinye iimeko, ezinye iitologi zesekethe ezisusa imfuno yendlela yokuqhuba i-diode yomzimba inokuqwalaselwa ukunciphisa ilahleko ngakumbi.

Iinzuzo zokuNciphisa ilahleko ye-MOSFET yeDiode yoMzimba

Ukusebenza okuphuculweyo: Ukunciphisa ilahleko ye-diode yomzimba kukhokelela ekuphuculweni kokusebenza kwesekethe, ukuguqulela kusetyenziso oluphantsi lwamandla kunye nokonga amandla.

Ukunciphisa isiZukulwana soBubushushu: Ukunciphisa ilahleko kunciphisa ukuveliswa kobushushu ngaphakathi kwe-MOSFET kunye namacandelo ajikelezileyo, ukuphucula ukusebenza kwe-thermal kunye nokwandisa ixesha lokuphila kwecandelo.

Ukunyaniseka okuphuculweyo: Ukushisa okuphantsi kokusebenza kunye nokunciphisa uxinzelelo kumacandelo afaka isandla ekuphuculeni ukuthembeka kwesekethe kunye nokuphila ixesha elide.

Ukuqukumbela

Iidiode zomzimba ze-MOSFET, ngelixa zihlala zingahoywa, zinokuchaphazela kakhulu ukusebenza kwesekethe kunye nokusebenza. Ukuqonda imithombo yelahleko ye-diode yomzimba kunye nokuphumeza izicwangciso ezisebenzayo zokunciphisa kubalulekile ekuyileni ukusebenza kakuhle, iinkqubo zombane ezithembekileyo. Ngokwamkela obu buchule, iinjineli zinokunyusa ukusebenza kwesekethe, ukunciphisa ukusetyenziswa kwamandla, kunye nokwandisa ubomi boyilo lwabo lombane.