High voltage SBD
Nov 23, 2019| Shenzhen Shenchuang Hi-tech Electronics Co., Ltd (SChitec) yog lub tuam txhab ua haujlwm siab uas tshwj xeeb hauv xov tooj accessories ntau lawm thiab muag khoom. Peb cov khoom tseem ceeb muaj xws li kev mus ncig, chargers tsheb, USB cables, fais fab nyiaj hauv tuam txhab nyiaj thiab lwm yam khoom siv digital.Tag nrho cov khoom muaj kev nyab xeeb thiab txhim khu kev qha, nrog cov cim styles.products dhau daim ntawv pov thawj xws li CE, FCC, ROHS, UL, PSE, C-Tick, thiab lwm yam. , Yog tias koj txaus siab rau, koj tuaj yeem tiv tauj ceo@schitec.com ncaj qha.
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High voltage SBD
Rau lub sijhawm ntev, nyob rau hauv cov zis ntawm 12v-24v SMPS, tsuas yog 100V SBD lossis 200V Fred raug xaiv los ua lub siab zaus rectifier ntawm ob sab. Hauv cov zis ntawm 24 v-48 V SMPS, tsuas yog 200 v-400 V Fred raug xaiv. Cov neeg tsim qauv xav tau 150vsbd ntawm 100V thiab 200V thiab 200vsbd rau 48V tso zis SMPS. Nyob rau hauv ob xyoos tsis ntev los no, American IR tuam txhab, apt lub tuam txhab thiab ST lub tuam txhab tau tsim 150V thiab 200V SBD successively aiming ntawm lub lag luam loj loj ntawm high-voltage SBD. Piv nrog rau tus thawj low-pressure SBD, lub high-pressure SBD muaj PN junction txheej txheem, tsim ib tug hybrid qauv ntawm Schottky barrier thiab PN hlws ris, raws li qhia nyob rau hauv daim duab 2. Lub breakdown voltage ntawm SBD nrog cov qauv no yog borne los ntawm PN junction. . Los ntawm kev kho qhov kev tiv thaiv ntawm N-thaj tsam, lub thickness ntawm epitaxial txheej thiab diffusion qhov tob ntawm P + cheeb tsam, qhov kev puas tsuaj ntawm qhov rov qab tsis ncaj ncees cuam tshuam los ntawm lub sij hawm ntev insurmountable barrier ntawm 100V, ncav cuag 150V thiab 200V. Nyob rau hauv pem hauv ntej kev tsis ncaj ncees, lub conduction pib voltage ntawm PN hlws ris ntawm high voltage SBD yog 0.6V, thaum lub hlws ris voltage ntawm Schottky barrier yog tsuas yog hais txog 0.3V, yog li ntawd rau pem hauv ntej tam sim no yuav luag muab los ntawm Schottky barrier.
Yuav kom daws tau qhov teeb meem degradation ntawm Schottky barrier uas SBD yog ib qho yooj yim los tsim nyob rau hauv high kub, uas hloov los ntawm hlau semiconductor rectifying hu rau ohmic contact thiab poob conductivity, apt lub tuam txhab tsim hlau hlau silicide silicon barrier los ntawm annealing kev kho mob, yog li txhim kho qhov siab. Kev ua haujlwm kub thiab kev ntseeg siab ntawm Schottky barrier.
Lub 150vsbd tsim los ntawm ST tuam txhab yog tshwj xeeb tsim los hloov 200V siab zaus rectifier Fred nyob rau hauv cov zis ntawm 12v-24v SMPS. Zoo li stps16150ct SBD nrog cov ntsuas tam sim no ntawm 2 × 8a, qhov pib hluav taws xob yog 0.07v (tus nqi raug yog 0.47v) qis dua 200V / 2 × 8afred (xws li strr162ct), ntawm kev tiv thaiv Rd (125 degree) yog 6.5m Ω ( Tus nqi raug yog 40m Ω), thiab qhov poob yog 0.18w (tus nqi raug yog 1.14w).
Apt100s20b, apt100s20lct thiab apt2 × 10is20 hom 200vsbd yog qhia los ntawm lub tuam txhab apt. Qhov nruab nrab rau pem hauv ntej tam sim no yog (AV) yog 100A, rau pem hauv ntej voltage poob VF Tsawg dua los yog sib npaug rau 0.95v, avalanche zog EAS=100mJ. Cov lus qhia rau EAS yog
EAS=VRRM×IAS×td
Hauv cov qauv, VRRM ntawm 200vsbd=200V, IAS yog avalanche tam sim no, thiab IAS ≈ yog=100A, EAS=100mJ. Lub sijhawm txij nkawm tsis muaj hluav taws kub hauv IAS: td=EAS / (VRRM × IAS)=1000mj / (200V × 100a)=5 μ s. Qhov ntawd yog hais tias, thaum IAS=100A tom qab avalanche, SBD tuaj yeem xyuas kom meej tias cov cuab yeej yuav tsis raug puas tsuaj li ntawm 5 μs. EAS yog qhov tseem ceeb rau kev ntsuas kev ntseeg tau ntawm Schottky barrier. SBD ntawm 200V / 100A tuaj yeem hloov Fred ntawm tus nqi tas li hauv kev sib txuas lus SMPS ntawm 48V cov zis, uas tuaj yeem txo qhov poob ntawm rectifier los ntawm 10% ~ 15%. Vim tias lub zog nrawm nrawm thiab avalanche ntawm SBD, qhov system zaus thiab kev ntseeg tau zoo dua, thiab EMI kuj tseem txhim kho tau zoo.
Cov neeg hauv kev lag luam ntseeg tias txawm tias cov khoom siv semiconductor tshiab tsis siv, SBD's withstand voltage yuav tsum siab tshaj 200V los ntawm cov txheej txheem thiab tsim innovation, tab sis feem ntau nws yuav tsis pub tshaj 600V.