Yuav xaiv MOSFET li cas?

1. Txiav txim siab hom

 

- N-channel lossis P-channel: Xaiv ntawm N-channel lossis P-channel MOSFET raws li kev tsim hluav taws xob. Feem ntau, N-channel MOSFETs yog siv rau qis-sab hloov, thaum P-channel MOSFETs yog siv rau high-sab switching.

 

2. Kev ntsuas hluav taws xob

 

- Maximum Drain-Source Voltage (VDS): Txiav txim siab qhov siab tshaj plaws ntws-rau-qhov voltage. Tus nqi no yuav tsum tshaj qhov tseeb qhov kev ntxhov siab nyob rau hauv lub voj voog nrog cov npoo txaus rau kev nyab xeeb.

- Qhov siab tshaj plaws Gate-Source Voltage (VGS): Xyuas kom lub MOSFET ua tau raws li qhov yuav tsum tau muaj qhov hluav taws xob ntawm lub voj voog tsav tsheb thiab tsis pub dhau lub rooj vag qhov hluav taws xob.

 

3. Muaj peev xwm tam sim no

 

- Rated Current (ID): Xaiv MOSFET nrog cov ntsuas tam sim no uas ntau dua lossis sib npaug rau qhov siab tshaj plaws uas xav tau tam sim no hauv Circuit Court. Xav txog cov pulse ncov tam sim no kom ntseeg tau tias MOSFET tuaj yeem tswj tau qhov siab tshaj plaws tam sim no raws li cov xwm txheej no.

 

4. On-Resistance (RDS(on))

 

- On-Resistance: Qhov kev tawm tsam yog qhov tsis kam ntawm MOSFET thaum nws ua. Xaiv MOSFET nrog RDS qis (rau) txo qis zog thiab txhim kho kev ua haujlwm.

 

5. Hloov Kev Ua Haujlwm

 

- Hloov nrawm: Xav txog qhov hloov pauv zaus (FS) thiab lub sijhawm nce / poob ntawm MOSFET. Rau cov ntawv thov siv zaus, xaiv MOSFET nrog cov yam ntxwv hloov ceev.

- Capacitance: Lub rooj vag-drain, rooj vag-qhov, thiab qhov dej-qhov peev xwm cuam tshuam rau kev hloov ceev thiab kev ua haujlwm, yog li cov no yuav tsum tau txiav txim siab thaum xaiv.

 

6. Ntim thiab Thermal Management

 

- Pob Hom: Xaiv hom pob tsim nyog raws li qhov chaw PCB, qhov xav tau thermal, thiab txheej txheem tsim khoom. Qhov loj thiab thermal kev ua tau zoo ntawm lub pob yuav cuam tshuam lub mounting thiab txias efficiency ntawm MOSFET.

- Thermal Requirements: Txheeb xyuas qhov kev xav tau ntawm lub cev, tshwj xeeb tshaj yog nyob rau hauv cov xwm txheej phem tshaj plaws. Xaiv MOSFET uas tuaj yeem ua haujlwm ib txwm nyob rau hauv cov xwm txheej no kom tsis txhob muaj qhov tsis ua haujlwm vim muaj cua sov dhau.

 

7. Qhov kub thiab txias

 

- Xyuas kom meej tias qhov kev khiav hauj lwm kub ntawm MOSFET phim cov kev cai ib puag ncig ntawm lub kaw lus.

 

8. Kev txiav txim siab tshwj xeeb rau daim ntawv thov

 

- Cov ntawv siv hluav taws xob tsawg: Rau cov ntawv thov siv 5V lossis 3V cov khoom siv hluav taws xob, ua tib zoo mloog rau MOSFET lub rooj vag voltage txwv.

- Kev siv hluav taws xob dav dav: MOSFET nrog lub teeb tsa Zener diode yuav tsum tau txwv lub rooj vag voltage viav vias.

- Dual Voltage Applications: Kev tsim tshwj xeeb hauv Circuit Court tej zaum yuav xav tau los tswj lub siab-sab MOSFET zoo los ntawm sab qis.

 

9. Kev ntseeg siab thiab zoo

 

- Xav txog cov chaw tsim khoom lub koob npe nrov, kev ruaj ntseg zoo, thiab kev ruaj ntseg ntev ntawm cov khoom. Rau cov ntawv thov kev ntseeg siab, tsheb-qib lossis lwm yam ntawv pov thawj MOSFETs yuav tsum tau.

 

10. Nqi thiab Muaj

 

- Xav txog tus nqi ntawm MOSFET thiab tus neeg muag khoom lub sijhawm ua haujlwm thiab cov khoom siv ruaj khov, kom ntseeg tau tias cov khoom ua tau raws li kev ua tau zoo thiab kev siv nyiaj txiag.

 

Summary of Selection Steps:

 

- Txiav txim seb puas yuav tsum muaj N-channel lossis P-channel MOSFET.

- Tsim kom muaj qhov siab tshaj plaws ntws-qhov hluav taws xob (VDS) thiab qhov rooj qhov hluav taws xob (VGS).

- Xaiv lub MOSFET nrog cov ntsuas tam sim no (ID) uas tuaj yeem tswj tau qhov siab tshaj plaws tam sim no.

- Xaiv MOSFET nrog RDS qis (rau) kom txhim kho kev ua haujlwm zoo.

- Xav txog MOSFET qhov hloov pauv ceev thiab qhov cuam tshuam ntawm kev ua haujlwm ntawm kev ua haujlwm.

- Xaiv hom pob tsim nyog raws li qhov chaw, thermal xav tau, thiab PCB tsim.

- Xyuas kom meej tias qhov ntsuas kub ua haujlwm haum rau qhov system qhov yuav tsum tau ua.

- Sau nyiaj rau cov kev xav tau tshwj xeeb, xws li kev txwv tsis pub muaj hluav taws xob thiab kev tsim hluav taws xob.

- Ntsuam xyuas cov chaw tsim khoom kev ntseeg siab thiab zoo.

- Qhov tseem ceeb ntawm tus nqi thiab cov saw hlau ruaj khov.

 

Thaum xaiv MOSFET, nws raug nquahu kom sab laj cov ntaub ntawv ntawm lub cuab yeej thiab ua cov ncauj lus kom ntxaws txog kev ntsuas hluav taws xob thiab kev suav kom paub tseeb tias nws ua tau raws li txhua yam kev tsim qauv. Kev ua simulations thiab kev sim kuj yog ib qho tseem ceeb rau kev txheeb xyuas qhov tseeb ntawm koj qhov kev xaiv.