Kusankha MOSFET yoyenera kumaphatikizapo kuganizira magawo angapo kuti muwonetsetse kuti ikukwaniritsa zofunikira za pulogalamu inayake. Nawa njira zazikulu ndi malingaliro posankha MOSFET:
1. Dziwani Mtundu
- N-channel kapena P-channel: Sankhani pakati pa N-channel kapena P-channel MOSFET kutengera kapangidwe ka dera. Nthawi zambiri, ma MOSFET a N-channel amagwiritsidwa ntchito posinthira mbali zotsika, pomwe ma MOSFET a P-channel amagwiritsidwa ntchito pakusintha kwapamwamba.
2. Mavoti a Voltage
- Maximum Drain-Source Voltage (VDS): Dziwani kuchuluka kwa voliyumu ya drain-to-source. Mtengo uwu uyenera kupitilira mphamvu yeniyeni yamagetsi mudera lomwe lili ndi malire okwanira chitetezo.
- Maximum Gate-Source Voltage (VGS): Onetsetsani kuti MOSFET ikukwaniritsa zofunikira zamagetsi a dera loyendetsa ndipo sichidutsa malire amagetsi a chipata.
3. Kuthekera Kwamakono
- Idavoteredwa Panopa (ID): Sankhani MOSFET yokhala ndi mphamvu yapano yomwe ndi yayikulu kuposa kapena yofanana ndi yomwe ikuyembekezeredwa pakali pano. Ganizirani za pulse peak pano kuti muwonetsetse kuti MOSFET imatha kuthana ndi zomwe zikuchitika panthawiyi.
4. On-Resistance (RDS(pa))
- On-Resistance: Kukaniza ndi kukana kwa MOSFET pamene ikuchita. Kusankha MOSFET yokhala ndi RDS yotsika (pa) kumachepetsa kutayika kwa mphamvu ndikuwongolera bwino.
5. Kusintha Magwiridwe
- Kusintha Kuthamanga: Ganizirani ma frequency osinthika (FS) ndi nthawi yokwera / kugwa kwa MOSFET. Pazogwiritsa ntchito pafupipafupi, sankhani MOSFET yokhala ndi mawonekedwe osinthira mwachangu.
- Capacitance: Kuthamanga kwa chipata, gwero la chipata, ndi mphamvu zowonongeka zimakhudza kusintha kwachangu ndi mphamvu, kotero izi ziyenera kuganiziridwa posankha.
6. Phukusi ndi Thermal Management
- Mtundu wa Phukusi: Sankhani mtundu woyenera wa phukusi kutengera malo a PCB, zofunikira zamafuta, ndi kupanga. Kukula ndi kutentha kwa phukusi kudzakhudza kukwera ndi kuzizira kwa MOSFET.
- Zofunikira za Kutentha: Unikani zosoweka zamatenthedwe a dongosolo, makamaka pazovuta kwambiri. Sankhani MOSFET yomwe imatha kugwira ntchito moyenera pansi pazimenezi kuti mupewe kulephera kwadongosolo chifukwa cha kutentha kwambiri.
7. Kutentha kosiyanasiyana
- Onetsetsani kuti kutentha kwa ntchito kwa MOSFET kumagwirizana ndi zofunikira za chilengedwe.
8. Mfundo Zapadera Zogwiritsira Ntchito
- Kugwiritsa Ntchito Ma Voltage Otsika: Pazinthu zogwiritsa ntchito magetsi a 5V kapena 3V, samalani kwambiri ndi malire amagetsi a MOSFET.
- Ma Wide Voltage Application: MOSFET yokhala ndi diode ya Zener yokhazikika ingafunike kuchepetsa kusuntha kwamagetsi pachipata.
- Kugwiritsa Ntchito Ma Voltage Awiri: Mapangidwe apadera ozungulira angafunike kuti azitha kuyendetsa bwino mbali ya MOSFET kuchokera kumunsi.
9. Kudalirika ndi Ubwino
- Ganizirani mbiri ya wopanga, chitsimikizo chaubwino, ndi kukhazikika kwa nthawi yayitali kwa gawolo. Pazinthu zodalirika kwambiri, ma MOSFET amagalimoto kapena ma MOSFET ena ovomerezeka angafunike.
10. Mtengo ndi Kupezeka
- Ganizirani za mtengo wa MOSFET ndi nthawi zotsogola za omwe amapereka komanso kukhazikika kwazinthu, kuwonetsetsa kuti gawoli likukwaniritsa zofunikira zonse zantchito ndi bajeti.
Chidule Chakusankha:
- Dziwani ngati MOSFET ya N-channel kapena P-channel ikufunika.
- Khazikitsani mphamvu yamagetsi ya drain-source (VDS) ndi magetsi a gate-source (VGS).
- Sankhani MOSFET yokhala ndi zida zamakono (ID) zomwe zimatha kuthana ndi mafunde apamwamba.
- Sankhani MOSFET yokhala ndi RDS yotsika (pa) kuti mugwire bwino ntchito.
- Ganizirani kuthamanga kwa kusintha kwa MOSFET komanso momwe mphamvu zimagwirira ntchito.
- Sankhani phukusi loyenera kutengera malo, zosowa zamafuta, ndi kapangidwe ka PCB.
- Onetsetsani kuti kutentha kwa ntchito kukugwirizana ndi zofunikira za dongosolo.
- Akaunti pazosowa zapadera, monga kuchepa kwa magetsi ndi kapangidwe ka dera.
- Onani kudalirika ndi mtundu wa wopanga.
- Factor mu mtengo ndi kukhazikika kwa chain chain.
Posankha MOSFET, tikulimbikitsidwa kukaonana ndi datadata ya chipangizocho ndikusanthula mwatsatanetsatane dera ndikuwerengera kuti zitsimikizire kuti zikugwirizana ndi mapangidwe onse. Kuchita zoyeserera ndi kuyesanso ndi gawo lofunikira kwambiri kuti mutsimikizire kulondola kwa zomwe mwasankha.
Nthawi yotumiza: Sep-28-2024
