Momwe mungapewere kulephera kwa MOSFET

Nthawi Yotumiza: Jul-29-2024

Pa nthawi iyi mu mlingo ntchito makampani, woyamba pa nambala ogula zamagetsi chipangizo adaputala katundu. Ndipo kutengera kugwiritsiridwa ntchito kwakukulu kwa MOSFET kumvetsetsa, kufunikira kwa MOSFET komwe kuli pachiwiri ndi bolodi lamakompyuta, NB, adapter yamagetsi yaukadaulo wamakompyuta, chiwonetsero cha LCD ndi zinthu zina. Pamodzi ndi kakulidwe kazinthu zoyambira mdziko, ma board a amayi apakompyuta, ma adapter amphamvu apakompyuta, zowunikira za LCD pazofunikira zaZithunzi za MOSFET ayenera kupita kupyola mkhalidwe wa ogula zamagetsi adaputala.

M'munsimu ndiMOS zifukwa zazikulu zisanu ndi chimodzi zosavomerezeka.

1. Kuwonongeka kwa nthaka ndi kosavomerezeka (voltage yogwiritsira ntchito ndi yosavomerezeka), yomwe nthawi zambiri imatchedwa kutayikira pakati pa gwero la magetsi oyendetsa BVdss kuposa momwe amachitira MOSFET, ndi kupitirira kuchita ntchito inayake yomwe imatsogolera ku MOSFET yosavomerezeka.

2.SOA ndiyosavomerezeka (kuyenda kwamagetsi ndikosayenera), ponse pa malo otetezeka a MOSFET oyambitsidwa ndi osavomerezeka, ogawidwa mu Id molingana ndi zomwe chipangizochi chili nacho komanso ndi chosavomerezeka ndipo id yake ndi yayikulu kwambiri, yatha kung'ambika komanso kung'ambika kwa chipangizocho chifukwa cha kuchuluka kwa matenthedwe kwanthawi yayitali chifukwa cholephera.

3. Diode ya thupi yolakwika. Mu mlatho, LLC ndi zina zogwira mtima ku diode ya thupi kuti zipitilize kupitiliza kwa maukonde, chifukwa diode ya thupi imakhudzidwa ndi kusavomerezeka.

Momwe mungapewere kulephera kwa MOSFET(1)

4. Resonance yosavomerezeka. Pakugwiritsiridwa ntchito kwa ulalo, chipata ndi magawo amagetsi amagetsi amatsogolera kusinthasintha komwe kumachitika chifukwa chakulephera.

5. Electrostatic induction ndi yolakwika. M'nyengo yozizira ndi kugwa, chifukwa cha thupi ndi makina ndi zida chifukwa cha kulowetsedwa kwa electrostatic chifukwa cha chipangizocho ndi chosavomerezeka.

6. Mphamvu yamagetsi yachipata yolakwika. Chifukwa chipata anali abnormal ntchito nsonga voteji, ndi kutsogolera pachipata chipata mpweya wosanjikiza ndi yolakwika.