Hobaneng ha kanale ea N MOSFET e ratoa ho feta P kanale ea MOSFET?

Lintlha tsa bohlokoa:Li-MOSFET tsa N-channel li ratoa lits'ebetsong tse ngata ka lebaka la litšoaneleho tsa tsona tse phahameng tsa ts'ebetso, ho kenyeletsoa khanyetso e tlase, lebelo le holimo la ho switjha, le theko e tlase. Tataiso ena e felletseng e hlalosa hore na hobaneng e le khetho ea mantlha bakeng sa moralo oa lisebelisoa tsa elektroniki.

Ho Utloisisa Lintlha tsa Motheo: N-Channel vs P-Channel MOSFETs

Lefatšeng la lisebelisoa tsa elektroniki tsa motlakase, khetho lipakeng tsa N-channel le P-channel MOSFET e bohlokoa bakeng sa moralo o nepahetseng oa potoloho. Mefuta ena ka bobeli e na le libaka tsa eona, empa li-MOSFET tsa N-channel li hlahile e le khetho e ratoang bakeng sa lits'ebetso tse ngata. A re hlahlobeng lebaka.

Sebopeho sa Motheo le Ts'ebetso

Li-MOSFET tsa N-channel li tsamaisa hajoale li sebelisa lielektrone joalo ka bajari ba bangata, ha P-channel MOSFET e sebelisa masoba. Phapang ena ea mantlha e lebisa melemong e 'maloa ea bohlokoa bakeng sa lisebelisoa tsa N-channel:

Tsamaiso e phahameng ea sepalangoang (li-electrone vs likoti)
Ho hanyetsa ka tlase (RDS(ho)
Litšobotsi tse ntle tsa ho fetoha
Ts'ebetso ea tlhahiso e bolokang chelete e ngata

Melemo ea Bohlokoa ea N-Channel MOSFETs

1. Ts'ebetso e Phahameng ea Motlakase

Li-MOSFET tsa N-channel li lula li feta balekane ba tsona ba P-channel libakeng tse 'maloa tsa bohlokoa:

Paramethara	N-Channel MOSFET	P-Channel MOSFET
Mopalami oa Mobility	~1400 cm²/V·s	~450 cm²/V·s
Ho hanyetsa	Tlase	Holimo (2.5-3x)
Ho fetola Lebelo	Kapele	Butlenyana

Ke Hobane'ng ha U Khetha Winsok's N-Channel MOSFETs?

Winsok e fana ka mefuta e mengata e fapaneng ea li-MOSFET tsa N-channel tse sebetsang hantle, ho kenyeletsoa letoto la rona la li-flagship 2N7000, tse phethahetseng bakeng sa lits'ebetso tsa hau tsa elektroniki tsa matla. Lisebelisoa tsa rona li na le:

Litlhaloso tsa RDS(on) tse etellang pele indastering
Ts'ebetso e phahameng ea mocheso
Litheko tsa tlholisano
Tšehetso e pharaletseng ea theknoloji

Kopa Mehlala ea Mahala →

Likopo tse Sebetsang le Mehopolo ea Moralo

1. Likopo tsa Phepelo ea Matla

Li-MOSFET tsa N-channel li ipabola ho fetoleng meralo ea phepelo ea motlakase, haholo ho:

Bafetoleli ba Buck

Li-MOSFET tsa N-channel li loketse ho fetola li-converter tsa li-buck tse mahlakoreng a holimo le a tlase ka lebaka la:

Bokhoni ba ho fetola kapele (hangata <100ns)
Litahlehelo tse tlase tsa conduction
Ts'ebetso e ntle ea mocheso

Matlafatsa bafetoleli

Ho li-topology tse matlafatsang, lisebelisoa tsa N-channel li fana ka:

Ho sebetsa hantle haholo maemong a phahameng a switjha
Tsamaiso e ntle ea mocheso
Palo e fokotsehileng ea likarolo meahong e meng

2. Likopo tsa ho laola likoloi

Bolaoli ba li-MOSFET tsa N-channel lits'ebetsong tsa taolo ea makoloi bo ka hlahisoa ke lintlha tse 'maloa:

Karolo ea Kopo	Molemo oa N-Channel	Tšusumetso ho Ts'ebetso
Lipotoloho tsa H-Bridge	Khanyetso e felletseng	Ho sebetsa ka mokhoa o phahameng, ho fokotsa tlhahiso ea mocheso
Taolo ea PWM	Lebelo la ho chencha kapele	Taolo e ntle ea lebelo, ts'ebetso e bonolo
Katleho ea Litšenyehelo	Ho hlokahala boholo bo fokolang	Litšenyehelo tsa sistimi e fokotsehile, boleng bo betere

Sehlahisoa se hlahang: Winsok's 2N7000 Series

Li-MOSFET tsa rona tsa 2N7000 N-channel li fana ka ts'ebetso e ikhethang bakeng sa lits'ebetso tsa taolo ea makoloi:

VDS(max): 60V
RDS(ho): 5.3Ω e tloaelehileng ho VGS = 10V
Ho fetoha ka potlako: tr = 10ns, tf = 10ns
E fumaneha ka liphutheloana tsa TO-92 le SOT-23

Fumana Quote bakeng sa 2N7000 Series

Ntlafatso ea Moralo le Mekhoa e Metle ka ho Fetisisa

Litlhaloso tsa Gate Drive

Moralo o nepahetseng oa liheke o bohlokoa bakeng sa ho holisa ts'ebetso ea N-channel MOSFET:

Khetho ea Motlakase oa HekeMotlakase o nepahetseng oa heke o netefatsa bonyane RDS (ho bulela) ha o ntse o boloka ts'ebetso e bolokehileng:
- Boemo ba logic: 4.5V - 5.5V
- E tloaelehileng: 10V - 12V
- Boemo bo phahameng: Hangata 20V
Ntlafatso ea Heke ea ResistanceLebelo la ho fetoha ho leka-lekanya le lintlha tsa EMI:
- RG e tlase: Ho fetoha ka potlako, EMI e phahameng
- RG e phahameng: EMI e tlase, tahlehelo e eketsehileng ea switching
- Mofuta o tloaelehileng: 10Ω - 100Ω

Litharollo tsa Tsamaiso ea Mocheso

Taolo e nepahetseng ea mocheso ke ea bohlokoa bakeng sa ts'ebetso e tšepahalang:

Mofuta oa Pakete	Ho hanyetsa Mocheso (°C/W)	E khothalelitsoeng Mokhoa oa ho Pholisa
HO TSA-220	62.5 (Junction to Ambient)	Heatsink + Fan bakeng sa >5W
TO-252 (DPAK)	92.3 (Junction to Ambient)	PCB Copper Pour + Air Phallo
SOT-23	250 (Junction to Ambient)	Tšela ea Koporo ea PCB

Tšehetso ea Theknoloji le Lisebelisoa

Winsok e fana ka ts'ehetso e felletseng bakeng sa ts'ebetsong ea hau ea MOSFET:

Lintlha tse qaqileng tsa tšebeliso le litataiso tsa moralo
Mefuta ea SPICE bakeng sa papiso ea potoloho
Thuso ea moralo oa mocheso
Litlhahiso tsa sebopeho sa PCB

Fumana Lisebelisoa tsa Tekheniki

Tlhahlobo ea Litšenyehelo-Melemo

Kakaretso ea Litšenyehelo tsa ho Bapisa Beng

Ha u bapisa N-channel le tharollo ea P-channel, nahana ka lintlha tsena:

Litšenyehelo Factor	N-Channel Tharollo	Tharollo ea P-Channel
Theko ea Sesebelisoa	Tlase	Holimo (20-30%)
Khanna Potoloho	Ho rarahana ho itekanetseng	Ha bonolo
Litlhoko tsa ho Pholisa	Tlase	E phahameng
Kakaretso ea Litšenyehelo tsa Tsamaiso	Tlase	E phahameng

Ho Etsa Khetho e Nepahetseng

Le hoja li-MOSFET tsa P-channel li na le sebaka sa tsona lits'ebetsong tse khethehileng, li-MOSFET tsa N-channel li fana ka ts'ebetso e phahameng le boleng meralong e mengata. Melemo ea bona ka katleho, lebelo le litšenyehelo li ba etsa khetho e ratoang bakeng sa lisebelisoa tsa motlakase tsa sejoale-joale.

Na U se U Loketse ho Ntlafatsa Moralo oa Hao?

Ikopanye le sehlopha sa tekheniki sa Winsok bakeng sa thuso ea khetho ea MOSFET ea motho ka mong le likopo tsa sampole.

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