Yadda za a zabi MOSFET?

1. Ƙayyade Nau'in

 

- N-channel ko P-tashar: Zaɓi tsakanin tashar N-channel ko P-tashar MOSFET dangane da ƙirar kewaye. Yawanci, ana amfani da MOSFET-tashar N-tashar don sauyawar ƙananan gefe, yayin da MOSFET-tashar P-tashar ana amfani da su don sauyawa mai girma.

 

2. Ƙimar Wutar Lantarki

 

- Matsakaicin Wutar Lantarki-Source Voltage (VDS): Ƙayyade matsakaicin magudanar ruwa zuwa tushen ƙarfin lantarki. Wannan ƙimar yakamata ta wuce ainihin ƙarfin ƙarfin lantarki a cikin da'irar tare da isasshen iyaka don aminci.

- Matsakaicin Ƙofar-Source Voltage (VGS): Tabbatar cewa MOSFET ta cika buƙatun ƙarfin lantarki na kewayen tuƙi kuma baya wuce iyakar ƙarfin wutar lantarkin kofa.

 

3. Iyawar Yanzu

 

- Rated Current (ID): Zaɓi MOSFET tare da ƙimar halin yanzu wanda ya fi ko daidai da iyakar da ake tsammani a cikin kewaye. Yi la'akari da mafi girman halin yanzu don tabbatar da MOSFET na iya ɗaukar matsakaicin halin yanzu a ƙarƙashin waɗannan sharuɗɗan.

 

4. On-Resistance (RDS(on))

 

- Juriya: Juriya shine juriya na MOSFET lokacin da take gudanarwa. Zaɓin MOSFET tare da ƙaramin RDS(on) yana rage asarar wuta kuma yana haɓaka aiki.

 

5. Canza Ayyuka

 

- Saurin Canjawa: Yi la'akari da mitar sauyawa (FS) da lokutan tashi / faɗuwar MOSFET. Don aikace-aikacen mitoci masu girma, zaɓi MOSFET tare da halayen sauyawa cikin sauri.

- Capacitance: Ƙofar-magudanar ruwa, tushen kofa, da ƙarfin magudanar ruwa suna shafar saurin sauyawa da inganci, don haka yakamata a yi la'akari da waɗannan yayin zaɓin.

 

6. Kunshin da Kula da thermal

 

- Nau'in Kunshin: Zaɓi nau'in fakitin da ya dace dangane da sararin PCB, buƙatun zafi, da tsarin masana'antu. Girman da aikin zafi na fakitin zai yi tasiri ga haɓakawa da sanyaya ingancin MOSFET.

- Abubuwan buƙatun thermal: Yi nazarin buƙatun zafi na tsarin, musamman a cikin mafi munin yanayi. Zaɓi MOSFET wanda zai iya aiki akai-akai a ƙarƙashin waɗannan sharuɗɗan don guje wa gazawar tsarin saboda yawan zafi.

 

7. Yanayin Zazzabi

 

- Tabbatar da kewayon zafin aiki na MOSFET ya dace da bukatun muhalli na tsarin.

 

8. Abubuwan Shawarwari na Musamman

 

- Aikace-aikacen Ƙarƙashin Wuta: Don aikace-aikace masu amfani da kayan wuta na 5V ko 3V, kula da hankali sosai ga iyakokin wutar lantarki na ƙofar MOSFET.

- Aikace-aikacen Wutar Lantarki mai faɗi: MOSFET tare da ginanniyar diode Zener na iya buƙatar iyakance ƙarfin wutar lantarki na ƙofar.

- Aikace-aikace na Voltage Dual: Za a iya buƙatar ƙira na musamman don sarrafa MOSFET na babban gefe yadda ya kamata daga ƙananan gefe.

 

9. Amincewa da inganci

 

- Yi la'akari da sunan masana'anta, tabbacin inganci, da kwanciyar hankali na dogon lokaci na ɓangaren. Don aikace-aikacen babban abin dogaro, ana iya buƙatar darajar mota ko wasu ƙwararrun MOSFET.

 

10. Kudi da Samuwar

 

- Yi la'akari da farashin MOSFET da lokutan jagorar mai bayarwa da kwanciyar hankali, tabbatar da cewa sashin ya cika duka buƙatun aiki da kasafin kuɗi.

 

Takaitacciyar Matakan Zaɓi:

 

- Ƙayyade ko ana buƙatar N-channel ko P-channel MOSFET.

- Ƙaddamar da matsakaicin matsakaicin ƙarfin magudanar ruwa (VDS) da ƙarfin ƙarfin tushen ƙofar (VGS).

- Zaɓi MOSFET tare da ƙididdiga na yanzu (ID) wanda zai iya ɗaukar kololuwar igiyoyi.

- Zaɓi MOSFET tare da ƙananan RDS(on) don ingantaccen aiki.

- Yi la'akari da saurin sauya MOSFET da tasirin ƙarfin aiki akan aiki.

- Zaɓi nau'in fakitin da ya dace dangane da sarari, buƙatun zafi, da ƙirar PCB.

- Tabbatar cewa kewayon zafin aiki ya dace da bukatun tsarin.

- Asusu don buƙatu na musamman, kamar ƙarancin wutar lantarki da ƙirar kewaye.

- Kimanta amincin masana'anta da inganci.

- Factor a cikin farashi da kwanciyar hankali sarkar wadata.

 

Lokacin zabar MOSFET, ana ba da shawarar tuntuɓar bayanan na'urar da gudanar da cikakken bincike da ƙididdiga don tabbatar da ya cika duk yanayin ƙira. Yin wasan kwaikwayo da gwaje-gwaje kuma mataki ne mai mahimmanci don tabbatar da daidaiton zaɓin ku.