I. Likotsi tsa ESD le Litlhoko tsa Tšireletso

Electrostatic discharge (ESD) ke ketsahalo eo ho eona tefiso e bokellaneng holim'a ntho e lokolloang ka potlako, joalo ka maikutlo a "electric shock" ha motho a ama sesebelisoa sa elektroniki. Matla a tsoang hang hang a ka fihla ho likete tsa li-volts kapa ho feta, a baka tšenyo e sa feleng ho li-semiconductor chips. Ka mohlala, ha monoana oa static-charged o ama sebopeho sa fono, ESD ea hona joale e ka 'na ea senya heke oxide ka har'a chip ka potoloho, e leng se lebisang ho se sebetseng ha sesebelisoa.

Ho sebetsana le tšokelo ena, hangata baenjiniere ba sebelisa li-diode tsa ts'ireletso tsa ESD lipotolohong. Mosebetsi oa bona oa mantlha ke ho khelosa hona joale fatše ka potlako nakong ea ketsahalo ea ESD, ho thibela likarolo tse tebileng ho mamella motlakase o feteletseng. Lisebelisoa tse joalo li loketse ka ho khetheha bakeng sa li-interfaces tse pepeneneng tse kang USB, HDMI, le libese tsa CAN-libaka tse kotsing ea ho tsosoa ke ESD e ka ntle.

II. Melao-motheo ea ho sebetsa ea ESD Diode

Moemeli ea tloaelehileng oa li-diode tsa ESD ke diode ea Transient Voltage Suppressor (TVS), eo mokhoa oa eona oa ts'ebetso o ipapisitseng le phello ea ho senyeha ha avalanche ea likarolo tsa PN:

1. Boemo bo tloaelehileng: Diode e boemong bo phahameng ba ho itšireletsa 'me ha e ame phetiso ea pontšo ea potoloho. Mohlala, lihokelong tsa USB, matla a parasitic a diode tsa ESD a tlameha ho laoloa ho ea ho li-picofarad tse 'maloa kapa tlase (mohlala, TI's ESD2CANFD24 ke 2.5pF feela) ho qoba ho kena-kenana le phetiso ea data e potlakileng.

2. Nakong ea ts'usumetso ea ESD: Ha motlakase o feta moeli oa ho senyeha (mohlala, 8kV contact discharge), diode e sebetsa ka potlako, 'me impedance e theohela haufi le zero, e khelosa motlakase fatše. Mothating ona, motlakase o pharalletseng diode o tlamelloa ho isa boemong bo sireletsehileng (ke hore, "clamping voltage"). Mohlala, ON Semiconductor's ESD9B5.0ST5G e na le "clamping voltage" ea 12.5V ho 16A hajoale, e sireletsang li-backend chips ho ts'oenyeho ea matla a phahameng.

3. Litšobotsi tsa ho tsosolosa: Ka mor'a hore ketsahalo ea ESD e fele, diode e khutlela ka ho toba boemong bo phahameng ba ho itšireletsa, 'me potoloho e tsosolosa ts'ebetso e tloaelehileng. Ts'ebetso ena e nka li-sub-nanoseconds feela, ho netefatsa hore botšepehi ba matšoao bo lula bo sa amehe.

III. Lintlha tsa bohlokoa tsa Tekheniki le khetho Lintho tsa bohlokoa

1. Breakdown Voltage (VBR) le Working Voltage (VRWM)

VRWM ke matla a phahameng ka ho fetisisa ao diode e ka mamellang nakong ea ts'ebetso e tloaelehileng 'me e tlameha ho ba holimo ho feta motlakase oa pontšo ea potoloho. Ka mohlala, haeba sebaka sa pontšo ke 0-3.6V, sesebelisoa se nang le VRWM ≥ 3.6V se lokela ho khethoa; ho seng joalo, leakage current e ka etsahala. VBR ke motlakase oa bohlokoa oo diode e qalang ho sebetsa ho oona, hangata ka 10% -20% ho feta VRWM.

2. Mehaho ea Litsela tse peli le tsa Unidirectional

● Li-didirectional diode: E na le li-curve tsa IV tsa symmetric, tse loketseng matšoao a mahlakoreng a mabeli (mohlala, HDMI melapo e fapaneng), e sireletsang khahlanong le litšisinyeho tse ntle le tse mpe tsa ESD.

● Li-diode tsa Unidirectional: Lumella maqhubu hore a fetele nģa e le 'ngoe feela, a loketse mats'oao a unipolar (mohlala, lithapo tsa motlakase tsa USB) 'me a fana ka tšireletso e molemo khahlanong le maqhubu a fokolang. Mohlala, TI's ESD2CANFD24 e fana ka moralo o fapaneng, o ntlafalitsoeng bakeng sa likhokahano tsa mahlakore a mabeli ho libese tsa likoloi tsa CAN.

3. Dynamic Resistance (RDYN) le Clamping Voltage

RDYN e etsa qeto ea ho phahama ha motlakase nakong ea ketsahalo ea ESD. Ho hanyetsa ho tlase ho fella ka matla a tlase a clamping le tšireletso e ntle. Mohlala, diode e le 'ngoe ea ESD e kanna ea ba le voltage ea clamping ea 13.4V ho 16A hajoale, ha e' ngoe e nang le khanyetso e tlase ea matla (joalo ka ha ho bonts'itsoe moepeng o motala oa TLP) e na le matla a ho koala a 10V feela ka nako e ts'oanang.

4. Litšobotsi tsa Capacitance

Bakeng sa li-interfaces tsa lebelo le phahameng (mohlala, USB3.0), mefuta e tlase ea bokhoni e ea hlokahala. Mohlala, letoto la ON Semiconductor's SL15 le fokotsa matla ho isa tlase ho 5pF ho sebelisa li-diode tsa mats'eliso a letoto, tse loketseng phetiso ea data ea 5Gbps.

IV. Maemo le Teko ea Indasteri ea Tšireletso ea ESD

Tekanyetso ea IEC 61000-4-2 e ntlafalitsoeng ke International Electrotechnical Commission (IEC) ke motheo oa mantlha oa ts'ireletso ea ESD:

● Boemo ba ho lahla: Ho fihla ho 8kV (Boemo ba 4), ho etsisa ho tsoa ha ho ama thepa ka ho toba.

● Boemo ba ho tsoa ha moea: Ho fihla ho 15kV, ho etsisa ho tsoa ho tsitsitseng ka likheo tsa moea.

Habohlokoa, ho na le phapang lipakeng tsa litekanyetso tsa ESD tsa chip (mohlala, mohlala oa HBM) le litlhoko tsa ts'ireletso ea boemo ba sistimi. Ka mohlala, chip e ka fetisa tlhahlobo ea 2kV HBM empa ea hlōleha tlhahlobo ea 2kV IEC hobane mohlala oa IEC o na le ho phahama ka potlako ha joale (<1ns) le matla a holimo. Ka hona, li-diode tsa ESD tsa kantle lia hlokahala ho ntlafatsa ts'ireletso ea boemo ba sistimi.

V. Maemo a Tloaelehileng a Kopo le Litlhahiso tsa Moralo

1. Lisebelisuoa tsa elektroniki tsa bareki: Mahokelo a USB-C ka har'a lifono le matlapa hangata a sebelisa liteishene tse ngata tsa ESD diode (mohlala, lisebelisoa tse pakiloeng tsa Dongwo Electronics' SOT-23) ho sireletsa lithapo tsa motlakase le tsa data.

2. Lisebelisoa tsa elektronike tsa likoloi: Libese tsa CAN li hloka mahlahahlaha; TI's ESD2CANFD24 e ts'ehetsa ±25kV ho tsoa ha likhokahano, ho fihlela litlhoko tse phahameng tsa ts'epo ea lits'ebetso tsa koloi.

3. Lisebelisoa tsa indasteri: Mehala ea puisano ea RS485, li-diode tsa ESD tse nang le matla a tlaase (mohlala, mohlala oa 751pF oa ESD0.5) li thibela ho sotha ha matšoao.

Linotlolo tsa moralo:

● Beha li-diode tsa ESD haufi le sebopeho ka hohle kamoo ho ka khonehang ho khutsufatsa tsela ea hona joale.

● Qoba li-resistors tsa letoto pakeng tsa diode le fatše ho netefatsa hore ho na le ts'ebetso e tlaase ea impedance.

● Bakeng sa mats'oao a maqhubu a phahameng, leka-lekanya capacitance le "clamping voltage".

VI. Maikutlo a Tloaelehileng a Fosahetseng le Lintlafatso tsa Theknoloji

1. Maikutlo a fosahetseng: Ho nka hore tekanyo ea ESD ea chip (mohlala, HBM 2kV) e lekane ho sireletsa sistimi. Ha e le hantle, maemo a HBM a etsisa ESD feela libakeng tsa tlhahiso, athe maemo a IEC a haufi le maemo a ts'ebeliso ea lefats'e.

2. Mekhoa ea thekenoloji: Ha ho kopanya li-chip ho ntse ho eketseha, li-diode tsa ESD li ntse li ea ho matla a tlaase (mohlala, 0.1pF) le matla a phahameng a matla (mohlala, pakete e le 'ngoe ea tšireletso ea litsela tse ngata). Mohlala, li-diode tsa Toshiba tsa TVS li fihlella liparamente tse tlase ho lipakete tsa QFN ka lits'ebetso tse ntlafalitsoeng tsa wafer.

Summary

Li-diode tsa ESD ke "li-fuse" tsa lisebelisoa tsa elektroniki. Moralo oa bona o hloka ho nahanoa ka botlalo ka litšobotsi tsa potoloho, tšitiso ea tikoloho, le maemo a indasteri. ho khetha litharollo tse nepahetseng tsa ts'ireletso ea ESD (mohlala, meaho e fapaneng, mefuta e tlase ea bokhoni) le ho latela ka tieo liteko tsa IEC 61000-4-2 ho ka ntlafatsa haholo ts'epahalo ea sesebelisoa le nako ea bophelo. Ebang ke taolong ea elektroniki ea bareki kapa indastering, li-diode tsa ESD li lula e le "bahlokomeli ba sa bonahaleng," ba sireletsang ts'ebetso e tsitsitseng ea litsamaiso tsa sejoale-joale tsa elektroniki.

About SLKOR:

SLKOR, e nang le ntlo-khōlō e Shenzhen, Chaena, ke khoebo ea naha e tsoetseng pele ea theknoloji e phahameng lefapheng la semiconductor ea matla. Ka litsi tsa R&D tse Beijing le Suzhou, sehlopha sa eona sa mantlha sa tekheniki se tsoa Univesithing ea Tsinghua. Joaloka moqapi oa theknoloji ea sesebelisoa sa matla sa silicon carbide (SiC), SLKORLihlahisoa tsa 'ona li sebelisoa haholo likoloing tse ncha tsa matla, tlhahiso ea matla a photovoltaic, IoT ea indasteri, le lisebelisoa tsa elektroniki tsa bareki, li fana ka tharollo ea bohlokoa ea semiconductor ho bareki ba fetang 10,000 lefatšeng ka bophara.

Khamphani e fana ka li-unit tse fetang limilione tse likete tse 2 selemo le selemo, ka li-SiC MOSFET tsa eona le 5th-generation ultrafast recovery SBD diodes e beha litekanyetso tsa indasteri ka tekanyo ea katleho le botsitso ba mocheso. SLKOR e na le litokelo tsa boqapi tse fetang 100 mme e fana ka mefuta ea lihlahisoa tsa 2,000+, e tsoela pele ho atolosa IP portfolio ea eona ho lisebelisoa tsa motlakase, li-sensor, le li-IC tsa taolo ea matla. Lisetifikeiti tse kenyelletsang ISO 9001, EU RoHS/REACH, le CP65 li bonts'a boitlamo bo tiileng ba k'hamphani ho boqapi ba mahlale, tlhahiso e fokolang, le nts'etsopele ea moshoelella.