Yiziphi Izinzuzo zama-MOSFET Amandla?

Ama-MOSFET Amandla abe yithuluzi elikhethwayo ezinhlelweni zanamuhla zama-electronics, aguqula imboni ngezici zayo zokusebenza ezisezingeni eliphezulu. Lokhu kuhlaziya okuphelele kuhlola izinzuzo eziningi ezenza amandla ama-MOSFET abaluleke kakhulu ezinhlelweni zanamuhla zama-elekthronikhi.

1. Ukusebenza Okulawulwa Amandla kagesi

Ngokungafani nama-bipolar junction transistors (BJTs) okungamadivayisi alawulwa manje, amandla e-MOSFET alawulwa yi-voltage. Lesi sici esiyisisekelo sinikeza izinzuzo ezimbalwa ezibalulekile:

Izidingo ze-gate drive ezenziwe lula
Ukusetshenziswa kwamandla okuphansi kumjikelezo wokulawula
Amandla okushintsha ngokushesha
Azikho izinkathazo zokuhlukaniswa kwesibili

Ukuqhathaniswa kwe-BJT kanye ne-MOSFET gate drive circuits

Umfanekiso 1: Izidingo zokushayela isango ezenziwe lula zama-MOSFET uma kuqhathaniswa nama-BJT

2. Superior Ukushintsha Performance

Ama-MOSFET Amandla ahamba phambili ezinhlelweni zokushintsha imvamisa ephezulu, enikeza izinzuzo eziningi ngaphezu kwama-BJT endabuko:

Ishintsha ukuqhathaniswa kwesivinini phakathi kwe-MOSFET ne-BJT

Umfanekiso 2: Ukushintsha ukuqhathanisa kwesivinini phakathi kwe-MOSFET ne-BJT

Ipharamitha	Amandla e-MOSFET	I-BJT
Ukushintsha Isivinini	Ngokushesha kakhulu (ububanzi be-ns)	Okulingene (μs ububanzi)
Ukushintsha Ukulahlekelwa	Phansi	Phezulu
Imvamisa Yokushintsha Ephezulu	> 1 MHz	~ 100 kHz

3. Izici Zokushisa

Ama-MOSFET Amandla akhombisa izici ezishisayo ezisezingeni eliphakeme ezifaka isandla ekuthembekeni nasekusebenzeni kwawo:

Izici ezishisayo kanye ne-coefficient yezinga lokushisa

Umfanekiso 3: I-temperature coefficient ye-RDS(on) emandleni ama-MOSFET

I-coefficient yezinga lokushisa elihle ivimbela ukubaleka okushisayo
Ukwabelana kwamanje okungcono ekusebenzeni okufanayo
Ukuzinza okushisayo okuphezulu
Indawo yokusebenza ephephile ebanzi (SOA)

4. Ukumelana Okuphansi Kwesifunda

Ama-MOSFET wamandla esimanje afinyelela ukumelana nesimo esiphansi kakhulu (i-RDS(ku)), okuholela ezinzuzweni ezimbalwa:

Ukuthambekela komlando kokuthuthukiswa kwe-RDS(kuvuliwe).

Umfanekiso 4: Ukuthuthukiswa komlando ku-MOSFET RDS(ku)

5. Ikhono Elihambisanayo

Ama-MOSFET Amandla angaxhunywa kalula ngokuhambisana ukuze abambe amaza aphezulu, ngenxa ye-coefficient yawo yezinga lokushisa elihle:

Ukusebenza okuhambisanayo kwama-MOSFET

Umfanekiso 5: Ukwabelana kwamanje kuma-MOSFET axhumene ngokuhambisana

6. Ukuqina kanye Nokwethenjelwa

Ama-MOSFET Amandla anikezela ngokuqina okuhle kakhulu nezici zokuthembeka:

Ayikho into yesibili yokuhlukaniswa
I-diode yomzimba engokwemvelo yokuvikela i-voltage ehlehlayo
Ikhono elihle kakhulu le-avalanche
Amandla aphezulu we-dV/dt

Ukuqhathanisa Indawo Esebenzayo Ephephile

Umfanekiso 6: Indawo Esebenzayo Ephephile (SOA) ukuqhathanisa phakathi kwe-MOSFET ne-BJT

7. Ukusebenza Kwezindleko

Nakuba amandla ngamanye ama-MOSFET angase abe nezindleko eziphakeme zokuqala uma kuqhathaniswa nama-BJT, izinzuzo zawo zezinga lesistimu zizonke zivame ukuphumela ekongeni kwezindleko: