Indlela yokukhetha i-MOSFET?

1. Thola Uhlobo

 

- I-N-channel noma i-P-channel: Khetha phakathi kwe-N-channel noma i-P-channel MOSFET ngokusekelwe kumklamo wesekethe. Ngokuvamile, ama-MOSFET wesiteshi se-N asetshenziselwa ukushintsha ohlangothini oluphansi, kuyilapho ama-MOSFET e-P-channel asetshenziselwa ukushintsha ohlangothini oluphezulu.

 

2. Izilinganiso zamandla kagesi

 

- I-Maximum Drain-Source Voltage (VDS): Thola ubuningi bamandla kagesi wokudonsa ukuya emthonjeni. Leli nani kufanele lidlule ingcindezi yamandla kagesi okuyisekethi enemajini eyanele ukuze kuphephe.

- I-Maximum Gate-Source Voltage (VGS): Qinisekisa ukuthi i-MOSFET ihlangabezana nezidingo zamandla kagesi wesekethe yokushayela futhi aweqi umkhawulo wamandla kagesi womthombo wesango.

 

3. Ikhono Lamanje

 

- Ikalwe Okwamanje (ID): Khetha i-MOSFET enamandla amanje amakhulu noma alingana nomkhawulo wamanje olindelekile kusekethe. Cabangela i-pulse peak current ukuze uqinisekise ukuthi i-MOSFET ingakwazi ukuphatha ubuningi bamanje ngaphansi kwalezi zimo.

 

4. I-On-Resistance (i-RDS(ivuliwe))

 

- I-On-Resistance: I-on-resistance ukumelana kwe-MOSFET uma iqhuba. Ukukhetha i-MOSFET ene-RDS(on) ephansi kunciphisa ukulahleka kwamandla futhi kuthuthukisa ukusebenza kahle.

 

5. Ukushintsha Ukusebenza

 

- Ukushintsha Isivinini: Cabangela imvamisa yokushintsha (FS) kanye nezikhathi zokukhuphuka/zokuwa ze-MOSFET. Ngezinhlelo zokusebenza zamafrikhwensi aphezulu, khetha i-MOSFET enezici zokushintsha ngokushesha.

- Amandla: Isango lokudonsa amanzi, isango-umthombo, namandla omthombo wokukhipha amanzi athinta isivinini sokushintshwa nokusebenza kahle, ngakho-ke lokhu kufanele kucatshangelwe ngesikhathi sokukhethwa.

 

6. Iphakheji kanye nokuphathwa kwe-Thermal

 

- Uhlobo Lwephakheji: Khetha uhlobo lwephakheji olufanele olusekelwe esikhaleni se-PCB, izidingo ezishisayo, nenqubo yokukhiqiza. Usayizi nokusebenza okushisayo kwephakheji kuzoba nomthelela ekukhwezeni nasekupholiseni ukusebenza kahle kwe-MOSFET.

- Izidingo Zokushisa: Hlaziya izidingo zokushisa zesistimu, ikakhulukazi ngaphansi kwezimo ezimbi kakhulu. Khetha i-MOSFET engasebenza ngokujwayelekile ngaphansi kwalezi zimo ukuze ugweme ukwehluleka kwesistimu ngenxa yokushisa ngokweqile.

 

7. Izinga Lokushisa

 

- Qinisekisa ukuthi izinga lokushisa elisebenzayo le-MOSFET lihambisana nezidingo zemvelo zohlelo.

 

8. Ukucatshangelwa Kwesicelo Esikhethekile

 

- Izicelo Ze-Voltge Ephansi: Kuzinhlelo zokusebenza ezisebenzisa amandla kagesi ayi-5V noma i-3V, bhekisisa imikhawulo yamandla kagesi wesango le-MOSFET.

- Izicelo Ze-Voltage Ebanzi: I-MOSFET ene-Zener diode eyakhelwe ngaphakathi ingase idingeke ukuze kukhawulwe ukujika kwamandla kagesi.

- Izicelo Zamandla Kagesi Ezimbili: Imiklamo yesekethe ekhethekile ingase idingeke ukuze kulawulwe kahle i-MOSFET yohlangothi oluphezulu ukusuka ohlangothini oluphansi.

 

9. Ukwethembeka kanye Nekhwalithi

 

- Cabangela isithunzi somkhiqizi, ukuqinisekiswa kwekhwalithi, nokuzinza kwesikhathi eside kwengxenye. Kuzinhlelo zokusebenza ezinokwethenjelwa okuphezulu, ibanga lezimoto noma amanye ama-MOSFET aqinisekisiwe angase adingeke.

 

10. Izindleko Nokutholakala

 

- Cabangela izindleko ze-MOSFET kanye nezikhathi zokuhola zomphakeli nokuzinza kokuhlinzeka, uqinisekisa ukuthi ingxenye ihlangabezana kokubili nezimfuneko zokusebenza nesabelomali.

 

Isifinyezo sezinyathelo zokukhetha:

 

- Nquma ukuthi iyadingeka yini i-N-channel noma i-P-channel MOSFET.

- Sungula i-drain-source voltage (VDS) kanye ne-gate-source voltage (VGS).

- Khetha i-MOSFET ene-current rated (ID) ekwazi ukuphatha imisinga ephezulu.

- Khetha i-MOSFET ene-RDS ephansi (ivuliwe) ukuze uthuthukise ukusebenza kahle.

- Cabangela isivinini sokushintsha se-MOSFET kanye nomthelela wamandla ekusebenzeni.

- Khetha uhlobo lwephakheji olufanele olusekelwe esikhaleni, izidingo ezishisayo, kanye nomklamo we-PCB.

- Qinisekisa ukuthi izinga lokushisa lokusebenza lihambisana nezidingo zesistimu.

- I-akhawunti yezidingo ezikhethekile, njengokulinganiselwa kwamandla kagesi kanye nokwakhiwa kwesekethe.

- Hlola ukwethembeka kanye nekhwalithi yomkhiqizi.

- Isici ezindlekweni nasekuzinzeni kwe-supply chain.

 

Lapho ukhetha i-MOSFET, kuyanconywa ukuthi ubheke idatha yedatha yedivayisi futhi wenze ukuhlaziya okuningiliziwe kwesekethe kanye nezibalo ukuze uqinisekise ukuthi ihlangabezana nazo zonke izimo zokuklama. Ukwenza ukulingisa nokuhlola kuyisinyathelo esibalulekile sokuqinisekisa ukufaneleka kokukhetha kwakho.