Yiziphi imingcele okufanele ngizinake lapho ngikhetha i-Triode ne-MOSFET?

Izingxenye ze-elekthronikhi zinemingcele kagesi, futhi kubalulekile ukushiya umkhawulo okwanele wezingxenye ze-elekthronikhi lapho ukhetha uhlobo lokuqinisekisa ukuzinza nokusebenza kwesikhathi eside kwezingxenye ze-elekthronikhi. Okulandelayo wethula kafushane indlela yokukhetha ye-Triode ne-MOSFET.

I-Triode iyithuluzi elilawulwa ukugeleza, i-MOSFET iyidivayisi elawulwa yi-voltage, kukhona ukufana phakathi kokubili, ekukhethweni kwesidingo sokucabangela i-voltage yokumelana, yamanje kanye neminye imingcele.

 

1, ngokuya ngokukhetha okuphezulu kokumelana ne-voltage

Umqoqi we-Triode u-C kanye ne-emitter E angakwazi ukumelana ne-voltage ephezulu phakathi kwe-CEO yepharamitha engu-V (BR), i-voltage phakathi kwe-CE ngesikhathi sokusebenza ngeke idlule inani elishiwo, ngaphandle kwalokho i-Triode izolimala unomphela.

I-voltage ephezulu iphinde ibe khona phakathi kwe-drain D kanye nomthombo S we-MOSFET ngesikhathi sokusetshenziswa, futhi i-voltage kuyo yonke i-DS phakathi nokusebenza akumele idlule inani elishiwo. Ngokuvamile, i-voltage imelana nevelu yeI-MOSFETiphakeme kakhulu kune-Triode.

 

2, ikhono eliphezulu le-overcurrent

I-Triode inepharamitha ye-ICM, okungukuthi, ikhono lokuqoqwa kwe-overcurrent, kanye nekhono elidlulele le-MOSFET livezwa ngokuya nge-ID. Uma ukusebenza kwamanje, okwamanje okugeleza ku-Triode/MOSFET akukwazi ukweqa inani elishiwo, ngaphandle kwalokho idivayisi izoshiswa.

Uma kucatshangelwa ukuzinza kokusebenza, umkhawulo ka-30% -50% noma ngisho nangaphezulu uvunyelwe ngokujwayelekile.

3,Izinga lokushisa lokusebenza

Ama-chips ebanga lezentengiso: ububanzi obujwayelekile obusuka ku-0 kuye ku-+70 ℃;

Ama-chips ebanga lezimboni: ububanzi obujwayelekile -40 kuya ku-+85 ℃;

Ama-chips ebangeni lezempi: ububanzi obujwayelekile -55 ℃ kuya ku-+150 ℃;

Lapho ukhetha i-MOSFET, khetha i-chip efanelekile ngokuya ngesikhathi sokusetshenziswa komkhiqizo.

 

4, ngokuya ngokukhetha imvamisa yokushintsha

Kokubili i-Triode ne-I-MOSFETbabe nemingcele yokushintsha imvamisa/isikhathi sokuphendula. Uma isetshenziswe kuma-circuits e-high-frequency, isikhathi sokuphendula se-tube yokushintsha kufanele sicatshangelwe ukuze sihlangabezane nemibandela yokusetshenziswa.

 

5,Eminye imibandela yokukhetha

Isibonelo, ipharamitha ye-on-resistance Ron ye-MOSFET, i-VTH turn-on voltage ye-I-MOSFET, njalo njalo.

 

Wonke umuntu okhethweni lwe-MOSFET, ungahlanganisa amaphuzu angenhla ukuze ukhethe.