Njengedivayisi evikelayo, amashubhu e-TVS angavimbela ngempumelelo ukuwohloka kwe-electrostatic futhi avikele amasekhethi. Lapho ukhetha amashubhu e-TVS, kufanele kuqashelwe imingcele yawo efanele, ngaphandle kwalokho kungase kuvele izinkinga ezingalindelekile. I-VRWM, VBR, Vc, Ipp, Cd yimingcele ebalulekile yokukhetha idivayisi ye-ESD/TVS
Incazelo:
I-VBR: Iphuzu lapho i-voltage yokuwa @ IT - TVS iba yi-impedance ephansi ngokushesha
I-VRWM: Gcina i-voltage - i-TVS isesimweni esingesona i-conductive kulesi sigaba
I-VC: I-clamping voltage @ Ipp - I-clamping voltage icishe ibe ngu-1.3 * VBR
VF: Phambili conduction voltage @ IF - Ukwehla kwamandla kagesi Phambili
I-ID: Hlehlisa Ukuvuza Kwamanje @ VRWM
IT: Hlola okwamanje ukuze uthole i-voltage yokugoqa
I-IPP: I-Burst peak current
IF: Phambili conduction current
Lapho i-IPP yamanje ye-pulse peak enesikhathi esingu-20mS igeleza ku-TVS, i-pulse voltage iboshelwa idivayisi yokuvikela ye-ESD, kanye ne-voltage ephezulu ephezulu eyenzeka kuzo zombili iziphetho yi-VC. I-VC ne-IPP ibonisa amandla okucindezela okukhuphuka kwe-TVS. (Qaphela: I-VC i-voltage ehlinzekwa yi-diode esimweni sokunqanyulwa, okungukuthi, i-voltage nge-TVS ngesikhathi se-ESD impulse state. Ayikwazi ukuba nkulu kunomkhawulo wevoltheji ovunyelwe wesekethe evikelekile, ngaphandle kwalokho idivayisi ibhekene nengcuphe yokulimala.).
Ukuvuza Okukhulu Okuhlehlisiwe Kwamanje @ VRWM
I-VRWM ibonisa ukuthi ngaphansi kwe-ID eshiwo, inani le-voltage emikhawulweni yomibili yedivayisi ye-TVS liba i-voltage yokusebenza ehlehlayo ephezulu. Ngokuvamile i-VRWM=(0.8~0.9) VBR. Kule voltage, ukusetshenziswa kwamandla kwedivayisi kuncane kakhulu. (Qaphela: Lapho ukhetha uhlobo, i-Vrwm akufanele ibe ngaphansi kukagesi ovamile osebenzayo wedivayisi evikelekile noma isekethe. Ngokuvamile, i-VopI-ONUokokusebenza kuvamise ukuba yi-12V, futhi ishubhu ye-TVS ngokuvamile ikhethwa ukulawula i-VC phakathi kwe-14V ne-16V.
I-voltage lapho i-transistor ye-TVS idlula khona ukuhlolwa okucacisiwe okwamanje, okuyi-voltage ephawuliwe ekhombisa ukuqhutshwa kwe-TVS transistor, okungukuthi, kusukela kuleli phuzu kuqhubeke, idivayisi ingena ngokuhlukana kwe-avalanche. I-VBR iyi-voltage encane yokuhlukaniswa kwe-TVS, futhi ku-25 ℃, i-TVS ngeke ibe nama-avalanche ngaphansi kwale voltage. Uma i-TVS igeleza ku-1mA yamanje (IR) eshiwo, i-voltage esetshenziswa ezigxotsheni ezimbili ze-TVS yi-voltage yayo encane yokuhlukanisa i-VBR. Ukuze kuhlangatshezwane nezinga lamazwe ngamazwe le-IEC61000-4-2, ama-TVS diode kufanele akwazi ukuphatha ubuncane bemithelela ye-ESD engu-8kV (contact) kanye ne-15kV (emoyeni). Abanye abakhiqizi be-semiconductor basebenzise izindinganiso zokumelana nomthelela ophezulu emikhiqizweni yabo. Kwezinye izinhlelo zokusebenza zedivayisi ephathekayo ezinezidingo ezikhethekile, abaklami bangakhetha amadivaysi ngokwezidingo zabo.
Okungenhla ukubuka okufushane kwamapharamitha Abalulekile Wokukhetha kwe-TVS, engasetshenziswa njengereferensi. Inkampani yethu ineqembu eliqinile lezobuchwepheshe futhi ingahlinzeka ngezinsizakalo zobuchwepheshe kumakhasimende. Njengamanje, inkampani yethu inemikhiqizo ehlukahlukene: ehlakaniphilewena, imojuli ye-optical yokuxhumana, i-optical fibre module, i-sfp optical module,oltimishini, Ethernetshintshanezinye izinto zenethiwekhi. Uma udinga, ungawaqonda ngokujulile.