Waa maxay sababta N kanaalka MOSFET looga door biday kanaalka P MOSFET?

Qaadashada Furaha:MOSFET-yada N-channel ayaa lagu door bidaa codsiyada badankooda sababtoo ah sifooyinkooda wax qabad ee sarreeya, oo ay ku jiraan iska caabbinta hoose, xawaaraha beddelka sare, iyo hufnaanta-kharashka oo wanaagsan. Hagahan dhammaystiran waxa uu sharxayaa sababta ay u yihiin doorashada-doorashada naqshadaynta korantada.

Fahamka Aasaaska: N-Channel vs P-Channel MOSFETs

Dunida korantada elektiroonigga ah, doorashada u dhaxaysa N-channel iyo P-channel MOSFETs ayaa muhiim u ah naqshadaynta wareegga ugu fiican. Labada noocba waxay leeyihiin boosaskooda, laakiin N-channel MOSFETs ayaa u soo baxay inay yihiin doorashada la doorbido ee codsiyada badankooda. Aan sahamin sababta.

Qaab dhismeedka aasaasiga ah iyo hawlgalka

MOSFET-yada N-channel waxay ku dhaqmaan isticmaalka elektarooniga ah sidayaal badan, halka P-channel MOSFET ay isticmaalaan godadka. Farqiga aasaasiga ah wuxuu keenayaa faa'iidooyin dhowr ah oo muhiim u ah aaladaha N-channel:

Dhaqdhaqaaqa side sare (electrons vs godadka)
Iska caabbinta hoose (RDS(daar))
Sifooyinka beddelka wanaagsan
Nidaam wax soo saar badan oo kharash-ool ah

Faa'iidooyinka muhiimka ah ee N-Channel MOSFETs

1. Waxqabadka Korontada Sare

MOSFET-yada N-channel waxay si joogto ah uga sarreeyaan dhiggooda P-channel-ka dhowr meelood oo muhiim ah:

Halbeegga	N-Channel MOSFET	P-Channel MOSFET
Dhaqdhaqaaqa side	~ 1400 cm²/V·s	~450 cm²/V·s
Iska caabinta	Hoose	Sare (2.5-3x)
Xawaaraha beddelka	Degdeg ah	Aayar

Waa maxay sababta Winsok's N-Channel MOSFETs u dooratay?

Winsok waxay bixisaa noocyo kala duwan oo wax qabad sare oo N-channel MOSFETs ah, oo ay ku jiraan taxanahayaga calanka 2N7000, oo ku habboon codsiyadaada korontada. Qalabkayadu waxa ay ka kooban yihiin:

Tilmaamaha RDS ee hogaaminaya warshadaha
Waxqabadka kulaylka sare
Qiimaha tartanka
Taageero farsamo oo ballaadhan

Codso muunado bilaash ah →

Codsiyada wax ku oolka ah iyo Tixgelinta Nakhshadeynta

1. Codsiyada Bixinta Korontada

MOSFET-yada N-channel waxay ku fiican yihiin beddelka naqshadaha sahayda korontada, gaar ahaan:

Beddelayaasha Buck

MOSFET-yada N-channel waxay ku fiican yihiin dhinaca-sare iyo dhinaca hoose ee beddelka beddelayaasha buck-ga sababtoo ah:

Awoodaha beddelka degdega ah (sida caadiga ah <100ns)
Khasaare ku-talo-gal hooseeya
Waxqabadka kulaylka heer sare ah

Kor uqaadayaasha

Kor u qaadista topologies, aaladaha N-channel waxay bixiyaan:

Waxtarka sare ee soo noqnoqoshada beddelka sare
Maamulka kulaylka wanaagsan
Tirada qaybaha la dhimay ee naqshadaha qaarkood

2. Codsiyada Xakamaynta Baabuurta

Awoodda N-channel MOSFETs ee codsiyada kontoroolka mootada waxaa loo aaneyn karaa dhowr arrimood:

Dhinaca Codsiga	Faa'iidada N-Channel	Saamaynta Waxqabadka
Wareegyada H-Bridge	Iska caabin hoose oo hoose	Waxtarka sare, soosaarka kulaylka oo yaraada
Xakamaynta PWM	Xawaaraha beddelka degdega ah	Xawaaraha kontoroolka ka wanaagsan, hawlgal fudud
Waxtarka Qiimaha	Cabbir yar oo dhinta ayaa loo baahan yahay	Qiimaha nidaamka oo la dhimay, qiimo fiican

Alaabta sifaysan: Winsok's 2N7000 Taxanaha

MOSFET-yada 2N7000 N-channel waxay soo bandhigaan waxqabad aan caadi ahayn oo loogu talagalay codsiyada xakamaynta mootada:

VDS (ugu badnaan): 60V
RDS (daran): 5.3Ω caadi ahaan VGS = 10V
Beddelka degdega ah: tr = 10ns, tf = 10ns
Waxaa laga heli karaa TO-92 iyo SOT-23 baakadaha

Hel Xigasho 2N7000 Taxane ah

Hagaajinta Naqshadeynta iyo Hababka ugu Fiican

Tixgelinta Gate Drive

Naqshada wadida albaabka saxda ah ayaa muhiim u ah sare u qaadida N-channel MOSFET:

Doorashada Voltage AlbaabKorontada albaabka ugu fiican waxay hubisaa ugu yaraan RDS(shid) iyadoo la ilaalinayo hawlgalka nabdoon:
- Heerka macquulka ah: 4.5V - 5.5V
- Heerka: 10V - 12V
- Qiimaynta ugu badan: Sida caadiga ah 20V
Hagaajinta iska caabinta AlbaabkaIsku dheellitir xawaaraha beddelka iyadoo la eegayo EMI:
- RG Hoose: Si degdeg ah u beddelasho, EMI sare
- RG Sare: EMI Hoose, korodhka khasaaraha beddelka
- Qiyaasta caadiga ah: 10Ω - 100Ω

Xalalka Maareynta Kulaylka

Maaraynta kulaylka ee waxtarka leh ayaa lagama maarmaan u ah hawlgal la isku halayn karo:

Nooca Xidhmada	Iska caabinta kulaylka (°C/W)	Habka qaboojinta ee lagu taliyay
TO-220	62.5 (Isgoysyada Ambient)	Heatsink + Taageere loogu talagalay>5W
TO-252 (DPAK)	92.3 (Isgoysyada Ambient)	PCB Copper Pour + Socodka Hawada
SOT-23	250 (Isgoysyada Ambient)	PCB Copper shub

Taageerada Farsamada iyo Khayraadka

Winsok waxay ku siisaa taageero dhamaystiran fulinta MOSFET:

Qoraallada codsiga oo faahfaahsan iyo hagayaasha naqshadaynta
Moodooyinka SPICE ee jilitaanka wareegga
Caawinta naqshadaynta kulaylka
Talooyinka qaabeynta PCB

Helitaanka Khayraadka Farsamada

Qiimaynta Faa'iidada Kharashka

Wadarta Qiimaha Lahaanshaha Isbarbardhigga

Marka la barbar dhigo N-channel iyo xalalka P-channel, tixgeli arrimahan:

Qodobka Qiimaha	N-Channel Solution	Xalka P-Channel
Qiimaha Qalabka	Hoose	Sare (20-30%)
Wareegga Wadida	Kakanaanta dhexdhexaadka ah	Ka fudud
Shuruudaha qaboojinta	Hoose	Sareeye
Qiimaha Nidaamka Guud	Hoose	Sareeye

Samaynta Doorashada Saxda ah

Halka MOSFET-yada P-channel ay booskooda ku leeyihiin codsiyo gaar ah, N-channel MOSFETs waxay bixiyaan waxqabad heer sare ah iyo qiimo nashqado badan. Faa'iidooyinka ay ku leeyihiin hufnaanta, xawaaraha, iyo kharashka ayaa ka dhigaya doorashada la doorbido ee korontada casriga ah.

Diyaar ma u tahay inaad wanaajiso naqshadaada?

La xidhiidh kooxda farsamada ee Winsok si aad u hesho kaalmada xulashada MOSFET ee gaarka ah iyo codsiyada muunad.

La xidhiidh Kooxda Iibka
Codso Tusaalooyinka