Ho tseba MOSFET joalo ka Phetoho: Tataiso e Felletseng ea Phethahatso ea Matla a Elektronike

Kakaretso e Potlakileng:Tataiso ena e felletseng e hlahloba mokhoa oa ho sebelisa li-MOSFET ka nepo e le li-switches lits'ebetsong tsa elektroniki, ho tsepamisitsoe ts'ebetsong e sebetsang le litharollo tsa lefats'e la nnete.

Ho utloisisa lintlha tsa motheo tsa MOSFET

Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs) e fetotse lisebelisoa tsa sejoale-joale tsa elektroniki ka ho fana ka tharollo e sebetsang le e tšepahalang ea ho switjha. Joaloka morekisi ea ka sehloohong oa li-MOSFET tsa boleng bo holimo, re tla u tataisa ho sohle seo u hlokang ho se tseba mabapi le ho sebelisa likarolo tsena tse fapaneng joalo ka li-switches.

Melao-motheo ea Ts'ebetso ea Motheo

Li-MOSFET li sebetsa e le li-switches tse laoloang ke motlakase, li fana ka melemo e mengata ho feta li-switch tsa setso le lisebelisoa tse ling tsa semiconductor:

Lebelo la ho fetoha ka potlako (nanosecond range)
Khanyetso ea boemo bo tlase (RDS(ho)
Tšebeliso e fokolang ea matla linaheng tse tsitsitseng
Ha ho na mokhachane le ho taboha

Ikopanye le Rona bakeng sa Litharollo tsa MOSFET

MOSFET Fetola Mekhoa ea Ts'ebetso le Litšobotsi

Libaka tsa Ts'ebetso ea Bohlokoa

Sebaka sa Ts'ebetso	Boemo ba VGS	Ho fetola Naha	Kopo
Sebaka se khaotsoeng	VGS <VTH	OFF State	Ts'ebetso ea potoloho e bulehileng
Sebaka sa Linear/Triode	VGS > VTH	ON State	Ho fetola lits'ebetso
Sebaka sa Saturation	VGS >> VTH	E ntlafalitsoe ka ho Fetisisa	Boemo bo nepahetseng ba ho fetoha

Mekhahlelo ea Bohlokoa bakeng sa Lits'ebetso tsa Phetoho

RDS(e butsoe):Khahlanong le mohloli oa drainage
VGS(th):Heke threshold voltage
ID(boholo):Boholo ba draina hajoale
VDS(max):Matla a phahameng a ho ntša metsi

Litaelo tse Sebetsang tsa ho Phethahatsa

Litlhoko tsa Gate Drive

Ho khanna ka tsela e nepahetseng ho bohlokoa bakeng sa ts'ebetso e nepahetseng ea MOSFET. Nahana ka lintlha tsena tsa bohlokoa:

Litlhoko tsa motlakase oa heke (hangata 10-12V bakeng sa ntlafatso e felletseng)
Litšobotsi tsa tefiso ea heke
Litlhoko tsa lebelo la ho fetoha
Khetho ea khanyetso ea heke

Lipotoloho tsa Tšireletso

Kenya ts'ebetsong mehato ena ea ts'ireletso ho netefatsa ts'ebetso e tšepahalang:

Tšireletso ea heke-mohloli
- Zener diode bakeng sa tšireletso ea overvoltage
- Mohatelli oa heke bakeng sa moeli oa hajoale
Tšireletso ea mohloli oa metsi
- Li-circuits tsa snubber bakeng sa li-spikes tsa voltage
- Li-diode tsa Freewheeling bakeng sa meroalo e matla

Sheba Khetho ea rona ea MOSFET

Maikutlo a khethehileng a Kopo

Lisebelisoa tsa Phepelo ea Matla

Ho phepelo ea motlakase ea mofuta oa switch-mode (SMPS), li-MOSFET li sebetsa e le lisebelisoa tsa mantlha tsa ho switjha. Lintlha tsa bohlokoa li kenyelletsa:

Bokhoni ba ts'ebetso ea maqhubu a holimo
RDS e tlase (ho) bakeng sa ts'ebetso e ntlafetseng
Litšobotsi tsa ho fetola kapele
Litlhoko tsa tsamaiso ea mocheso

Likopo tsa Taolo ea Enjene

Bakeng sa lisebelisoa tsa ho khanna koloi, nahana ka lintlha tsena:

Bokhoni ba ho sebetsana le hona joale
Tšireletso ea morao-rao ea motlakase
Litlhoko tsa ho fetola maqhubu
Litlhokomelo tsa ho senya mocheso

Ho rarolla mathata le Ntlafatso ea Ts'ebetso

Mathata a Tloaelehileng le Litharollo

Hlahisa	Mabaka a ka Etsahalang	Litharollo
Litahlehelo tse phahameng tsa ho fetola	Ho se lekane ha heke, sebopeho se fosahetseng	Ntlafatsa ho khanna ha heke, ntlafatsa sebopeho sa PCB
Ho sisinyeha	Parasitic inductance, damping e sa lekaneng	Eketsa khanyetso ea heke, sebelisa li-circuits tsa snubber
Mocheso oa ho baleha	Pholiso e sa lekaneng, maqhubu a phahameng a ho fetoha	Ntlafatsa tsamaiso ea mocheso, fokotsa maqhubu a ho fetoha

Malebela a Ntlafatso ea Ts'ebetso

Ntlafatsa sebopeho sa PCB bakeng sa litlamorao tse fokolang tsa likokoana-hloko
Khetha sebaka se loketseng sa li-gate drive
Kenya ts'ebetsong tsamaiso e sebetsang ea mocheso
Sebelisa li-circuits tsa tšireletso tse nepahetseng

Hobaneng re Khetha li-MOSFET tsa Rōna?

Litlhaloso tsa RDS(on) tse etellang pele indastering
Ts'ehetso e felletseng ea tekheniki
Ketane ea phepelo e tšepahalang
Litheko tsa tlholisano

Kopa Khopolo Hona Joale

Mekhoa le Lintlafatso tsa Kamoso

Lula u le ka pele ho litheknoloji tsena tse ntseng li hlaha tsa MOSFET:

Wide bandgap semiconductors (SiC, GaN)
Mekhoa e tsoetseng pele ea ho paka
Litharollo tse ntlafalitsoeng tsa taolo ea mocheso
Ho kopanya le li-circuits tsa ho khanna tse bohlale

U hloka Tataiso ea Setsebi?

Sehlopha sa rona sa litsebi se ikemiselitse ho u thusa ho khetha tharollo e phethahetseng ea MOSFET bakeng sa ts'ebeliso ea hau. Ikopanye le rona bakeng sa thuso ea hau le tšehetso ea tekheniki.

Ikopanye le Sehlopha sa Rōna sa Theknoloji