I-reverse current ilapho i-voltage ekuphumeni kwesistimu ingaphezulu kwe-voltage kokokufaka, okubangela ukuthi i-current igeleze kusistimu ibheke emuva.
Imithombo:
1. i-body diode iba nokuchema phambili lapho i-MOSFET isetshenziselwa izinhlelo zokusebenza zokushintsha ukulayisha.
2. ukwehla okungazelelwe ku-voltage yokufaka lapho ugesi unqanyulwa ohlelweni.
Izikhathi lapho ukuvinjwa kwamanje okubuyela emuva kudinga ukucatshangelwa:
1. lapho ukunikezwa kwamandla okuphindaphindwe kabili kulawulwa yi-MOS
2. Ukulawula i-ORing.I-ORing ifana nokuphindaphinda amandla, ngaphandle kokuthi esikhundleni sokukhetha ukunikezwa kwamandla ukuze kunikwe amandla isistimu, i-voltage ephezulu kakhulu ihlale isetshenziselwa ukunika amandla isistimu.
3. Ukwehla kwe-voltage ehamba kancane ngesikhathi sokulahlekelwa amandla, ikakhulukazi uma amandla okukhiphayo makhulu kakhulu kunomthamo wokufaka.
Izingozi:
1. i-reverse current ingalimaza ukujikeleza kwangaphakathi nezinsiza zamandla
2. ama-spikes amanje ahlehlayo angalimaza izintambo nezixhumi
3. I-diode yomzimba ye-MOS iyakhuphuka ekusetshenzisweni kwamandla futhi ingalimala
Izindlela zokuthuthukisa:
1. Sebenzisa ama-diode
Ama-Diode, ikakhulukazi ama-Schottky diode, avikelekile ngokwemvelo ngokumelene ne-polarity ehlehlayo kanye ne-reverse, kodwa ayabiza, anemisinga yokuvuza ephezulu ehlehlayo, futhi adinga ukuchithwa kokushisa.
2. Sebenzisa i-MOS ebuyela emuva
Zombili izikhombisi-ndlela zingavinjwa, kepha zihlala endaweni enkulu yebhodi, i-impedance ephezulu yokuqhuba, izindleko eziphezulu.
Emfanekisweni olandelayo, ukuqhutshwa kwe-transistor yokulawula, umqoqi wayo uphansi, ukuqhutshwa kwe-PMOS okubili, lapho i-transistor ivaliwe, uma okukhiphayo kuphakeme kunokufaka, uhlangothi olungakwesokudla lwe-MOS body diode conduction, ukuze izinga le-D phezulu, okwenza izinga le-G libe phezulu, uhlangothi lwesobunxele lwe-MOS body diode aludluli, futhi ngasikhathi sinye, ngenxa ye-MOS ye-VSG yokwehla kwe-voltage ye-diode yomzimba ayifinyelele ku-voltage embundwini, ngakho-ke ama-MOS amabili avaliwe, okuvimbe okukhiphayo kokokufaka okwamanje.Lokhu kuvimbela okwamanje kusuka kokuphumayo kuye kokokufaka.
3. Hlehlisa uMOS
I-MOS ehlehlayo ingavimba okukhiphayo kokokufaka kokubuyela emuva, kodwa okubi ukuthi kuhlale kukhona indlela ye-diode yomzimba kusukela kokokufakayo kuya kokuphumayo, futhi ingahlakaniphi ngokwanele, lapho okukhiphayo kukukhulu kunokokufaka, akukwazi ukujika. ivaliwe ku-MOS, kodwa futhi udinga ukungeza isekethe yokuqhathanisa i-voltage, ngakho-ke kukhona i-diode efanelekile kamuva.
4. Ukushintshwa komthwalo
5. Ukwenza izinto eziningi
I-Multiplexing: ukukhetha okokufaka okukodwa kokubili noma ngaphezulu phakathi kwakho ukuze unike amandla okukhiphayo okukodwa.
6. I-Diode ekahle
Kunemigomo emibili ekwenzeni i-diode ekahle, eyodwa iwukulingisa i-Schottky kanti enye iwukuthi kufanele kube nesekhethi yokuqhathanisa okokufaka nokuphumayo ukuyivala ibuyele emuva.
Isikhathi sokuthumela: Aug-10-2023