I. Izingozi ze-ESD kanye Nezidingo Zokuvikela

I-Electrostatic discharge (ESD) yinto lapho ukushajwa okunqwabelene endaweni yento kukhishwa khona ngokushesha, njengokuthi "ukushaqeka kukagesi" lapho umuntu ethinta idivayisi kagesi. Amandla kagesi akhululwa ngokuphazima kweso angafinyelela izinkulungwane zamavolthi noma ngaphezulu, okubangele ukulimala unomphela kuma-semiconductor chips. Isibonelo, uma umunwe oshajewe uthinta ukuxhumana kwefoni, i-ESD yamanje ingase yephule i-oxide yesango ngaphakathi kwe-chip ngesekhethi, okuholela ekuhlulekeni kwedivayisi.

Ukuze kubhekwane nalolu songo, onjiniyela ngokuvamile basebenzisa ama-diode okuvikela e-ESD kumasekhethi. Umsebenzi wabo oyinhloko ukuphambukisa ngokushesha okwamanje emhlabathini ngesikhathi somcimbi we-ESD, ukuvimbela izingxenye ezibucayi ekubekezeleni amandla kagesi amaningi. Amadivayisi anjalo afaneleka ngokukhethekile ukuxhumana obala njenge-USB, i-HDMI, namabhasi e-CAN—izindawo ezisengozini enkulu yokushaqiswa kwe-ESD yangaphandle.

II. Izimiso Zokusebenza Eziyinhloko ze-ESD Diodes

Ummeleli ojwayelekile wama-ESD diode yi-Transient Voltage Suppressor (TVS) diode, indlela yayo yokusebenza esuselwe kumphumela wokuqhekeka kwe-avalanche wamajunction e-PN:

1. Isimo esijwayelekile: I-diode isesimweni sokuvinjwa okuphezulu futhi ayithinti ukudluliswa kwesignali yesifunda. Isibonelo, kuzixhumi ezibonakalayo ze-USB, amandla e-parasitic we-ESD diode kufanele alawulwe kuma-picofarad ambalwa noma ngaphansi (isb, i-TI's ESD2CANFD24 ingu-2.5pF kuphela) ukuze kugwenywe ukuphazamisa ukudluliswa kwedatha okunesivinini esikhulu.

2. Ngesikhathi somthelela we-ESD: Uma i-voltage idlula umkhawulo wokuwohloka (isb., ukukhishwa kokuxhumana okungu-8kV), i-diode iqhuba ngokushesha, ngokuphazamiseka kwehlela ku-zero, kuchezukisela amandla emhlabathini. Kuleli qophelo, i-voltage kuyo yonke i-diode iboshelwe ezingeni eliphephile (okungukuthi, "i-clamping voltage"). Isibonelo, i-ON Semiconductor's ESD9B5.0ST5G ine-clamping voltage engu-12.5V ku-16A yamanje, ivikela ama-backend chips ekushaqisweni kwe-voltage ephezulu.

3. Izici zokubuyisela: Ngemva kokuphela komcimbi we-ESD, i-diode ibuyela ngokuzenzakalelayo esimweni sokuvinjelwa okuphezulu, futhi isifunda siqala kabusha ukusebenza okuvamile. Le nqubo ithatha ama-sub-nanosecond kuphela, iqinisekisa ubuqotho besignali buhlala bungathintwa.

III. Amapharamitha Abalulekile Obuchwepheshe nokukhetha Okubalulekile

1. I-Breakdown Voltage (VBR) kanye ne-Working Voltage (VRWM)

I-VRWM iyi-voltage ephezulu i-diode engakwazi ukumelana nayo ngesikhathi sokusebenza okuvamile futhi kufanele ibe phezulu kune-voltage yesignali yesifunda. Isibonelo, uma ububanzi besignali bungu-0-3.6V, idivayisi ene-VRWM ≥ 3.6V kufanele ikhethwe; kungenjalo, ukuvuza kwamanje kungase kwenzeke. I-VBR iyi-voltage ebalulekile lapho i-diode iqala ukusebenza khona, ngokuvamile ngo-10% -20% ngaphezu kwe-VRWM.

2. Izakhiwo ezinhlangothi zombili nezingaqondiwe ngakunye

● I-Bidirectional diode: Iba namajika e-IV alinganayo, afanele amasiginali aqondiswa kabili (isb, imigqa ehlukile ye-HDMI), evikela kukho kokubili ukushaqeka okuhle nokubi kwe-ESD.

● I-unidirectional diode: Ivumela igagasi ukuthi lidlule liye ohlangothini olulodwa kuphela, lilungele amasignali e-unipolar (isb., izintambo zamandla e-USB) futhi zinikeze ukuvikeleka okungcono kuma-voltage angaphansi. Isibonelo, i-TI's ESD2CANFD24 ifaka idizayini eqondiswe kabili, elungiselelwe ukuxhumana okuqondiswa kabili kumabhasi ezimoto e-CAN.

3. I-Dynamic Resistance (RDYN) kanye ne-Clamping Voltage

I-RDYN inquma ukukhuphuka kwe-voltage ngesikhathi somcimbi we-ESD. Ukumelana nokuguquguquka okuphansi kuholela ku-voltage ecindezelayo ephansi kanye nokuvikela okungcono. Isibonelo, enye i-ESD diode ingase ibe ne-clamping voltage engu-13.4V ku-16A yamanje, kanti enye enokumelana okuguquguqukayo okuphansi (njengoba kuboniswe ejikeni le-TLP eluhlaza) ine-clamping voltage engu-10V kuphela ngesikhathi esifanayo.

4. I-Capacitance Characters

Ngokuxhumana okunesivinini esikhulu (isb, i-USB3.0), amamodeli anamandla aphansi ayadingeka. Isibonelo, uchungechunge lwe-SL15 lwe-ON Semiconductor lwehlisa amandla abe ngaphansi kuka-5pF kusetshenziswa ama-diode esinxephezelo ochungechunge, afanele ukudluliswa kwedatha okungu-5Gbps.

IV. Amazinga Nokuhlolwa Kwemboni Yokuvikela ESD

Izinga le-IEC 61000-4-2 elakhiwe yi-International Electrotechnical Commission (IEC) liyisisekelo esiyinhloko sokuvikelwa kwe-ESD:

● Izinga lokukhipha lokuxhumana: Kufika ku-8kV (Izinga 4), ukulingisa ukukhipha lapho uthinta imishini ngokuqondile.

● Ileveli yokukhishwa komoya: Kufika ku-15kV, kulingisa ukukhishwa okumile ngamagebe omoya.

Ngokuphawulekayo, kunomehluko phakathi kwesilinganiso se-chip ye-ESD (isb, imodeli ye-HBM) kanye nezidingo zokuvikela izinga lesistimu. Isibonelo, i-chip ingase iphumelele ukuhlolwa kwe-2kV HBM kodwa yehlule uhlolo lwe-2kV IEC ngenxa yokuthi imodeli ye-IEC inokunyuka kwamanje okusheshayo (<1ns) namandla aphezulu. Ngakho-ke, ama-diode e-ESD angaphandle ayadingeka ukuze kuthuthukiswe ukuvikelwa kwezinga lesistimu.

V. Izimo Zokusebenza Ezivamile kanye Nezincomo Zomklamo

1. Izinto zikagesi zabathengi: Izixhumi ezibonakalayo ze-USB-C kumafoni namathebulethi ngokuvamile zisebenzisa ama-diode e-ESD eziteshi eziningi (isb, amadivayisi apakishiwe e-Dongwo Electronics' SOT-23) ukuze kuvikelwe kokubili amandla nemigqa yedatha.

2. Ama-elekthronikhi ezimoto: Amabhasi e-CAN adinga ubunzima; I-TI's ESD2CANFD24 isekela ukukhishwa kokuxhumana okungu-±25kV, ukuhlangabezana nezidingo eziphezulu zokuthembeka kwezinhlelo zemoto.

3. Imishini yezimboni: Emigqeni yokuxhumana ye-RS485, ama-diode e-ESD anamandla aphansi (isb, imodeli ye-ESD751's 0.5pF) avimbela ukuhlanekezelwa kwesignali.

Okhiye bomklamo:

● Beka ama-diode e-ESD eduze kwesixhumi esibonakalayo ukuze unciphise indlela yamanje.

● Gwema ukuphikiswa kochungechunge phakathi kwe-diode nomhlabathi ukuze uqinisekise ukukhishwa kwe-impedance ephansi.

● Ngamasignali amaza aphezulu, amandla ebhalansi kanye ne-clamping voltage.

VI. Imibono Engalungile Evamile kanye Nentuthuko Yezobuchwepheshe

1. Umbono oyiphutha: Ukucabanga ukuthi isilinganiso se-chip ye-ESD (isb, i-HBM 2kV) sanele ukuvikela isistimu. Eqinisweni, izinga le-HBM lilingisa kuphela i-ESD ezindaweni zokukhiqiza, kuyilapho izinga le-IEC liseduze nezimo zokusetshenziswa zomhlaba wangempela.

2. Amathrendi wezobuchwepheshe: Njengoba ukuhlanganiswa kwama-chip kwanda, ama-ESD diode aqhubekela kumandla aphansi (isb, 0.1pF) kanye nokuminyana kwamandla okuphezulu (isb, ukuvikelwa kwephakheji elilodwa lamashaneli amaningi). Isibonelo, ama-TVS diode ka-Toshiba afinyelela amapharamitha e-parasitic aphansi kumaphakheji we-QFN ngezinqubo ezithuthukisiwe ze-wafer.

Isifinyezo

Ama-ESD diode "ama-fuse" emishini kagesi. Ukuklama kwabo kudinga ukucatshangelwa okuphelele kwezici zesekethe, ukuphazamiseka kwemvelo, namazinga embonini. ukukhetha izixazululo ezifanele zokuvikela i-ESD (isb, izakhiwo ezimbili/ezingaqondile, amamodeli anamandla aphansi) nokulandela ngokuqinile ukuhlola kwe-IEC 61000-4-2 kungathuthukisa kakhulu ukuthembeka kwedivayisi nempilo yokuphila. Kungakhathaliseki ukuthi kubathengi bama-electronics noma ekulawuleni izimboni, ama-ESD diode ahlala "abanakekeli abangabonakali," evikela buthule ukusebenza okuzinzile kwamasistimu esimanje kagesi.

Mayelana SLKOR:

SLKOR, enekomkhulu e-Shenzhen, e-China, iyibhizinisi kazwelonke elithuthuka ngokushesha elithuthukayo emkhakheni we-semiconductor yamandla. Njengoba kunezikhungo ze-R&D e-Beijing nase-Suzhou, ithimba layo lezobuchwepheshe eliyinhloko lisuka eNyuvesi yaseTsinghua. Njengomsunguli we-silicon carbide (SiC) ubuchwepheshe bedivayisi yamandla, SLKORImikhiqizo isetshenziswa kakhulu ezimotweni zamandla amasha, ukukhiqiza amandla kagesi e-photovoltaic, i-IoT yezimboni, kanye nezinto zikagesi zabathengi, ihlinzeka ngezixazululo ezibalulekile ze-semiconductor kumakhasimende angaphezu kuka-10,000 emhlabeni jikelele.

Le nkampani iletha amayunithi angaphezu kwezigidi eziyizinkulungwane ezimbili ngonyaka, nama-SiC MOSFET ayo kanye nesizukulwane sesi-2 sokululama ngokushesha ama-SBD diode abeka amabhentshimakhi embonini ngesilinganiso sokusebenza kahle kanye nokuzinza okushisayo. SLKOR inamalungelo obunikazi okusungulwa angaphezu kwe-100 futhi inikeza amamodeli wemikhiqizo engu-2,000+, ngokuqhubekayo yandisa iphothifoliyo yayo ye-IP kuwo wonke amadivayisi kagesi, izinzwa, nama-IC okuphatha amandla. Izitifiketi ezihlanganisa i-ISO 9001, i-EU RoHS/REACH, nokuthobelana kwe-CP65 kukhombisa ukuzibophezela okuqinile kwenkampani ekusunguleni okusha kwezobuchwepheshe, ukukhiqiza okunciphile, kanye nentuthuko esimeme.