Nhungamiro dzeMOSFET Package Sarudzo

Chechipiri, saizi yezvisingakwanisi system

Mamwe masisitimu emagetsi anoganhurwa nehukuru hwePCB uye yemukati urefu, such senge masisitimu ekutaurirana, modular simba rekupa nekuda kwekureba kugumira kazhinji shandisa DFN5 * 6, DFN3 * 3 package; mune mamwe magetsi eACDC, kushandiswa kwekupedzisira-kutetepa dhizaini kana nekuda kwekugumira kwegoko, kuungana kweTO220 package yesimba MOSFET tsoka dzakaiswa zvakananga mumudzi wehurefu hwekugumira haugone kushandisa TO247 package. Imwe yekupedzisira-yakaonda dhizaini yakananga kubhenda mudziyo pini flat, iyi dhizaini yekugadzira inozoita yakaoma.

Chechitatu, kugadzirwa kwekambani

TO220 ine marudzi maviri epasuru: isina simbi pasuru uye yakazara purasitiki pasuru, isina simbi pasuru yekupisa kupikisa idiki, kupisa kupisa kugona kwakasimba, asi mukugadzira maitiro, iwe unofanirwa kuwedzera kudonhedza kudonha, maitiro ekugadzira akaomarara uye anodhura, nepo iyo yakazara yepurasitiki pasuru yekupisa yekupikisa yakakura, kugona kupisa kupisa hakuna simba, asi maitiro ekugadzira ari nyore.

Kuti uderedze maitiro ekugadzira ekuvhara screws, mumakore achangopfuura, mamwe emagetsi masisitimu anoshandisa zvimedu kune simba.MOSFETs clamped ari kupisa singi, kuitira kuti kubuda kwechinyakare TO220 chikamu chokumusoro chikamu kubviswa makomba ari itsva chimiro encapsulation, asiwo kuderedza kureba mudziyo.

Chechina, kudzora mutengo

Mune mamwe maapplication anonyanya kudhura akadai sedesktop motherboards nemabhodhi, simba MOSFETs mumapakeji eDPAK anowanzo shandiswa nekuda kwemutengo wakaderera wemapakeji akadaro. Naizvozvo, pakusarudza simba MOSFET package, yakasanganiswa nemaitiro ekambani yavo uye maficha echigadzirwa, uye funga zviri pamusoro apa.

Chechishanu, sarudza inomira voltage BVDSS kazhinji, nekuti dhizaini yekupinda vochikamu chemagetsi sisitimu yakagadziridzwa, kambani yakasarudza mumwe mutengesi weimwe nhamba yezvinhu, chigadzirwa chakayerwa voltage chinogadziriswa zvakare.

Iyo yekuputsika voltage BVDSS yesimba MOSFETs mudhetabheti yakatsanangura mamiriro ekuyedzwa, ane akasiyana siyana pasi pemamiriro akasiyana, uye BVDSS ine yakanaka tembiricha coefficient, mukushandiswa chaiko kwekubatanidzwa kwezvinhu izvi kunofanirwa kutariswa nenzira yakazara.

Ruzivo rwakawanda uye mabhuku anowanzo kutaurwa: kana sisitimu yesimba MOSFET VDS yeakakwira spike voltage kana yakakura kupfuura iyo BVDSS, kunyangwe iyo spike pulse voltage yenguva ishoma kana makumi e ns, simba MOSFET richapinda muvhu. uye nokudaro kukanganisa kunoitika.

Kusiyana netransistors uye IGBT, simba MOSFETs inokwanisa kuramba kuputika, uye mazhinji makuru semiconductor makambani ane simba MOSFET avalanche simba mumutsetse wekugadzira ndiyo yakazara yekuongorora, 100% kuona, ndiko kuti, mune data iyi chiyero chakavimbiswa, avalanche voltage. inowanzoitika mu 1.2 ~ 1.3 nguva BVDSS, uye nguva yenguva inowanzova μs, kunyange ms level, ipapo nguva. yevashoma chete kana makumi emakumi e ns, yakaderera zvakanyanya kupfuura avalanche voltage spike pulse voltage haina kukuvadzwa kune simba MOSFET.

Nhanhatu, nedhiraivha voltage sarudzo VTH

Akasiyana emagetsi masisitimu emagetsi MOSFETs akasarudzwa drive voltage haana kufanana, AC / DC magetsi emagetsi anowanzo shandisa 12V drive voltage, renotibhuku's motherboard DC / DC converter ichishandisa 5V drive voltage, saka zvinoenderana nesystem's drive voltage kusarudza akasiyana chikumbaridzo voltage. VTH simba MOSFETs.

Iyo chikumbaridzo voltage VTH yesimba MOSFETs mudhetabheti zvakare yakatsanangura mamiriro ebvunzo uye ine akasiyana siyana pasi pemamiriro akasiyana, uye VTH ine yakashata tembiricha coefficient. Different drive voltages VGS inoenderana neyakasiyana pa-resistance, uye mukuita zvinoshanda zvakakosha kufunga nezve tembiricha.

Mumashandisirwo anoshanda, kusiyanisa kwetembiricha kunofanirwa kuverengerwa kuti ive nechokwadi chekuti simba reMOSFET rakabatidzwa zvakazara, ukuwo uchiona kuti spike pulses yakasanganiswa neG-pole panguva yekuvharwa haizokonzerwi nekunyepa kukonzeresa. gadzira yakatwasuka kana pfupi-dunhu.