Ukungena kwiLizwe le-MOSFET yoMzimba weDiode: Ukuqonda indima yabo kuyilo lweSekethe

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 sijonga ubugocigoci be-MOSFET body diode, iphonononga iimpawu zabo, ukubaluleka kuyilo lwesekethe, kunye nokusetyenziswa okunokwenzeka.

Ukutyhilwa kwe-MOSFET Body Diode

Ifakwe ngaphakathi kolwakhiwo lwe-MOSFET, i-diode yomzimba yindawo edibeneyo ye-parasitic eyenzeka phakathi komsele kunye nemimandla yomthombo. Le diode ibonisa ukuhamba kwe-unidirectional yangoku, evumela ukuba okwangoku kudlule kwi-drain ukuya kumthombo kodwa kungekhona ngokuphambene.

Ukubaluleka kweDiode yoMzimba kuYilo lweSekethe

I-diode yomzimba idlala indima ebalulekileyo kwiinkqubo ezahlukeneyo zesekethe, ngakumbi kumbane wamandla:

I-Freewheeling Diode: Ngexesha lokucima isigaba se-MOSFET, i-diode yomzimba iqhuba i-inductive current ukusuka kumthwalo, ikhusela i-voltage spikes kunye nokukhusela i-MOSFET kumonakalo.

Ukubuyela umva uKhuseleko lwangoku: Kwiisekethe apho ukuhamba kwe-reverse kwangoku kuyinkxalabo, i-diode yomzimba isebenza njengesithintelo, ikhusela i-current ukuba ibuyele kwi-MOSFET.

I-Diode ye-Snubber: I-diode yomzimba inokusebenza njenge-snubber diode, ichitha amandla agcinwe kwi-inductances ye-parasitic kunye nokuthintela ukugqithisa kombane ngexesha lokutshintsha iziganeko.

Ukuqwalaselwa kwe-MOSFET Body Diodes

Ngelixa i-diode yomzimba ibonelela ngeenzuzo zendalo, kubalulekile ukuqwalasela imiba ethile kuyilo lwesekethe:

Ukubuyela umva amandla ombane: Iqondo lombane elibuyela umva le-diode yomzimba kufuneka lihambelane okanye ligqithise ubuninzi bombane obuya umva wesekethe ukuthintela ukophuka.

Phambili Ukuphatha ngoku: Ikhono langoku le-diode yomzimba kufuneka libe lanele ukujongana nencopho yangoku ngexesha le-freewheeling okanye i-reverse conduction scenarios.

Ukutshintsha isantya: Isantya sokutshintsha kwe-diode yomzimba, ngakumbi kwizicelo ze-high-frequency, akufanele ingenise ukulibaziseka okukhulu okanye ilahleko.

Ukusetyenziswa kwe-MOSFET Body Diodes

I-diode yomzimba ifumana usetyenziso kuluhlu olwahlukeneyo lweesekethe:

Iziguquli ze-DC-DC: Kwiziguquli ze-buck, i-diode yomzimba isebenza njenge-freewheeling diode, ikhusela i-MOSFET kwi-inductive voltage spikes.

IiSekethe zoLawulo lweeMoto: I-diode yomzimba ikhusela ukuhamba okubuyela umva xa i-motor ibhulekiwe okanye ivelisa umva we-EMF.

Ubonelelo lwamandla: Kumandla ombane, i-diode yomzimba ikhusela i-MOSFET ngexesha lokutshintsha izinto ezidlulayo kwaye ikhusela umva wangoku kumthwalo.

Ukuqukumbela

I-MOSFET body diode, ehlala ingahoywa, idlala indima ebalulekileyo kuyilo lwesekethe, ngakumbi kumbane wombane. Ukuqonda iimpawu zayo, ukubaluleka, kunye nezithintelo kubalulekile ekuyileni iisekethe ezomeleleyo, ezisebenzayo nezithembekileyo. Njengoko itekhnoloji ye-MOSFET ihambela phambili, ukubaluleka kwe-diode yomzimba kuya kuqhubeka, iqinisekisa ukufaneleka kwayo okuqhubekayo kwihlabathi elihlala livela le-elektroniki.