Menene Fa'idodin MOSFET na Wutar Lantarki?

MOSFETs masu ƙarfi sun zama na'urar da aka zaɓa a cikin aikace-aikacen lantarki na lantarki na zamani, suna canza masana'antar tare da mafi kyawun halayensu. Wannan cikakken bincike yana bincika fa'idodi da yawa waɗanda ke sa MOSFETs iko ya zama makawa a cikin tsarin lantarki na yau.

1. Ayyukan Gudanar da Wutar Lantarki

Ba kamar bipolar junction transistors (BJTs) waɗanda na'urori ne masu sarrafawa a halin yanzu, MOSFETs masu ƙarfi suna sarrafa wutar lantarki. Wannan sifa ta asali tana ba da fa'idodi masu mahimmanci:

Sauƙaƙe buƙatun tuƙin ƙofa
Ƙananan amfani da wutar lantarki a cikin da'irar sarrafawa
Saurin iya canzawa
Babu damuwa ta biyu

Kwatanta da'irar tuƙi na ƙofar BJT da MOSFET

Hoto 1: Sauƙaƙe buƙatun tuƙin ƙofa na MOSFET idan aka kwatanta da BJTs

2. Babban Ayyukan Canjawa

MOSFETs masu ƙarfi sun yi fice a cikin aikace-aikacen sauyawa mai ƙarfi, suna ba da fa'idodi da yawa akan BJT na gargajiya:

Canza kwatancen saurin gudu tsakanin MOSFET da BJT

Hoto 2: Canza kwatancen saurin gudu tsakanin MOSFET da BJT

Siga	MOSFET Power	BJT
Saurin Canjawa	Mai Sauri sosai (ns range)	Matsakaici (μs)
Canza Asara	Ƙananan	Babban
Matsakaicin Mitar Canjawa	> 1 MHz	~ 100 kHz

3. Halayen thermal

MOSFETs masu ƙarfi suna nuna ingantattun halaye na thermal waɗanda ke ba da gudummawa ga amincin su da aikin su:

Halayen thermal da yawan zafin jiki

Hoto 3: Ma'aunin zafin jiki na RDS(on) a cikin MOSFETs masu ƙarfi

Madaidaicin ƙimar zafin jiki yana hana guduwar zafi
Mafi kyawun rabawa na yanzu a cikin aiki iri ɗaya
Mafi girman kwanciyar hankali na thermal
Faɗin yankin aiki mai aminci (SOA)

4. Karancin Juriya a Jiha

MOSFETs masu iko na zamani sun sami ƙarancin juriya kan-jihar (RDS(on)), yana haifar da fa'idodi da yawa:

Halin tarihi na inganta RDS(kan).

Hoto 4: Inganta Tarihi a MOSFET RDS(on)

5. Daidaitawar iyawa

Ana iya haɗa MOSFET masu ƙarfi cikin sauƙi a layi ɗaya don ɗaukar manyan igiyoyin ruwa, godiya ga ingantaccen yanayin zafin su:

Daidaitaccen aiki na MOSFETs

Hoto 5: Rabawa na yanzu a cikin MOSFET masu haɗin kai

6. Rugged da Amincewa

MOSFETs masu ƙarfi suna ba da kyawawan halaye masu ƙarfi da aminci:

Babu wani lamari na rushewa na biyu
Diode na jiki don juyar da ƙarfin lantarki
Kyakkyawan iyawar bala'in iska
Babban iyawar dV/dt

Kwatanta yankin aiki mai aminci

Hoto 6: Safe Aiki (SOA) kwatanta tsakanin MOSFET da BJT

7. Farashin-Tasiri

Duk da yake ikon MOSFET na mutum ɗaya na iya samun ƙimar farko mafi girma idan aka kwatanta da BJTs, fa'idodin matakin tsarin su gabaɗaya yakan haifar da tanadin farashi: