Capacitor Basics: Tataiso e Felletseng ea Mefuta, Mesebetsi, le Likopo tsa PCB

1. Selelekela

Ho utloisisa metheo ea capacitor ho bohlokoa bakeng sa mang kapa mang ea sebetsang ka lisebelisoa tsa elektroniki tsa sejoale-joale. Ho tloha ho li-smartphone ho ea ho mechini ea indasteri, li-capacitor li sebetsa e le litene tsa motheo tse nolofalletsang botsitso ba matla, botšepehi ba lets'oao, le ts'ebetso ea potoloho. Tataiso ena e akaretsa litlhaloso tsa capacitor, melao-motheo ea ts'ebetso, mefuta, mesebetsi le lits'ebetso tse sebetsang tsa PCB.

Ho Highleap Electronics, mosebetsi oa rona oa letsatsi le letsatsi oa ho etsa le ho kopanya PCB o re fa boiphihlelo ba ho khetha le ho beoa ha capacitor lits'ebetsong tse fapaneng.

2. Capacitor ke Eng?

2.1 Tlhaloso ea Motheo

Capacitor ke karolo ea elektronike e sa sebetseng e bolokang matla a motlakase tšimong ea motlakase. E na le lipoleiti tse peli tsa conductive tse arohaneng ke thepa e sireletsang e bitsoang dielectric. Ha motlakase o sebelisoa, litefiso tse fapaneng li bokellana holim'a lipoleiti, li theha matla a bolokiloeng.

2.2 Karolo ea Sesebelisuoa sa Dielectric

Lisebelisoa tsa dielectric pakeng tsa lipoleiti tsa conductive li khetholla litšobotsi tsa motlakase oa capacitor. Li-dielectric tse fapaneng-ceramic, polyester, tantalum oxide, kapa aluminium oxide-li fana ka litekanyetso tse fapaneng tsa capacitance, litekanyetso tsa motlakase, le likarabo tsa maqhubu. Dielectric kamehla e susumetsa ka ho toba hore na capacitor e ka boloka chelete e kae.

2.3 Kamoo Chelete ea polokelo e Sebetsang Kateng

Ha motlakase o sebelisoa ho pholletsa le capacitor, lielektrone li bokellana holim'a poleiti e le 'ngoe ha poleiti e' ngoe e lahleheloa ke lielektrone, ho etsa sebaka sa motlakase ho pholletsa le dielectric. Karohano ena ea tefiso e boloka matla a ka lokolloang ha potoloho e e batla. Capacitor e boloka tefo ena ho fihlela e lokolloa ka mojaro kapa ho lutla.

2.4 Polokelo ea Matla le Tlhophiso ea AC

Li-capacitor li sebetsa joalo ka matamo a matla le li-filters tsa AC. Ba boloka matla nakong ea litlhōrō tsa motlakase 'me ba a lokolla nakong ea li-dips, ho tsamaisa matla a bonolo. Bakeng sa matšoao a AC, li-capacitor li hlahisa impedance e tlase, e lumellang AC hore e fete ha e ntse e thibela DC - thepa e sebelisoang hampe ho sefa le ho kopanya lits'ebetso.

2.5 Mehlala ea 'Nete ea Lefatše ea PCB

Ho PCB e tloaelehileng, li-capacitor li hlaha libakeng tse ngata: li-capacitor tse ngata tse haufi le li-connectors tsa motlakase li tsitsisa motlakase o kenang, li-decoupling capacitor tse haufi le IC power pins li hatella lerata la maqhubu a phahameng, 'me li-capacitor tse kopanyang mehalang ea lipontšo li thibela khethollo ea DC ha u fetisa matšoao a AC. Sebaka se seng le se seng se sebeletsa mosebetsi o itseng oa potoloho.

3. Kamoo Li-Capacitors li Sebetsang Kateng: Molao-motheo oa Motheo

3.1 Tšimo ea Motlakase le Karohano ea Tefiso

Ts'ebetso ea capacitor e itšetlehile ka sebaka sa motlakase se entsoeng pakeng tsa lipoleiti tse qositsoeng. Ha motlakase o sebelisoa, sebaka sa motlakase se sebelisa matla ho lielektrone, se bakang karohano ea litefiso. Sebaka sena se boloka matla a lekanang le lisekoere tsa voltage le boleng ba capacitance, ho etsa hore li-capacitor li be le lisebelisoa tse sebetsang tsa ho boloka matla.

3.2 Capacitance Equation: C = εA/d

Capacitance (C) e lekana le dielectric permittivity (ε) e atisoa ke plate area (A), e arotsoe ke sebaka se pakeng tsa lipoleiti (d). Lipoleiti tse kholoanyane le li-dielectric tse nang le tumello e phahameng li eketsa bokhoni; karohano e kholo ea poleiti ea e fokotsa. Kamano ena e tataisa moralo oa capacitor bakeng sa lits'ebetso tse ikhethileng.

3.3 Voltage, Charge, le Capacitance Relationship

Kamano ea mantlha Q = CV e hlalosa boitšoaro ba capacitor, moo Q e bolokiloeng tefiso, C ke capacitance, 'me V ke voltage. Matla a phahameng a boloka tefiso e eketsehileng ka voltage e fanoeng. Kamano ena e etsa qeto ea hore na li-capacitor li tjhaja le ho tsoa kapele hakae lipotolohong.

3.4 Boitšoaro bo loketseng vs. Real Capacitor Behaviour

Li-capacitor tse loketseng li ne li tla boloka le ho lokolla tefiso ka tahlehelo ea zero. Li-capacitor tsa 'nete li bonts'a tahlehelo ka ho hanyetsa ka hare, ho lutla ha hona joale, le ho monya ha dielectric. Litšobotsi tsena tse sa nepahalang li ama ts'ebetso ea potoloho, haholo-holo ka maqhubu a phahameng kapa lits'ebetsong tse nepahetseng.

3.5 Parasitics: Kenyelletso ea ESR le ESL

Equivalent Series Resistance (ESR) e emela tahlehelo ea ka hare ea ho hanyetsa e hlahisang mocheso nakong ea litefello / li-cycle tsa ho ntša. Equivalent Series Inductance (ESL) e tsoa ho lead le plate geometry, e fokotsa ts'ebetso ea maqhubu a holimo. Likokoana-hloko tsena li fetoha lintlha tsa bohlokoa moralong o phahameng oa lebelo la dijithale le matla a elektroniki.

4. Mesebetsi ea Bohlokoa ea Li-Capacitor ho Lipotoloho tsa Elektronike

4.1 Polokelo ea Matla

Ho Boloka le ho Fana ka Matla

Li-capacitor li sebetsa joalo ka polokelo ea matla ea lehae, li boloka tefiso ha motlakase oa phepelo o le holimo ebe lia o lokolla ha tlhoko e eketseha. Ketso ena ea buffering e boloka motlakase o tsitsitseng nakong ea mojaro oa nakoana, ho thibela ho putlama ha motlakase kapa li-voltage sags tse ka sitisang tšebetso ea potoloho.

Lisebelisoa tsa Terene ea Matla

Liporong tsa motlakase tsa PCB, li-capacitor tse ngata haufi le li-voltage regulator li boloka matla ho sebetsana le litlhoko tsa hona joale tsa ho fetola li-IC. Li-capacitor tsena li tlatselletsa nako ea karabelo ea molaoli, ho netefatsa phano e tsitsitseng ea motlakase le ha maqhubu a mojaro a fetoha ka potlako.

4.2 Ho sefa le ho batalatsa

Smoothing Rectified Power

Kamora ho lokisoa ha AC-to-DC, li-capacitor li theola tlhahiso ea DC. Li tjhaja nakong ea litlhoro tsa motlakase le ho tsoa nakong ea liphula, li fokotsa matla a motlakase ho ea maemong a amohelehang. Maemo a maholo a capacitance a fana ka tlhahiso e bonolo ea DC e nang le ripple e tlase.

Ho tlosoa ha Ripple ea DC-DC

Ho fetola li-converter tsa DC-DC ho hlahisa maqhubu a phahameng haholo ho liphetho tsa bona. Li-capacitor tse tlase tsa ESR ho sefaele se hlahisoang ke converter ripple ena, e fana ka matla a hloekileng a DC. Khetho e nepahetseng ea capacitor e thehiloeng ho tekanyo ea hona joale ea ripple e tiisa ts'ebetso e tšepahalang ea nako e telele.

4.3 Ho arohana le ho feta

Decoupling vs. Bypass Capacitors

Li-decoupling capacitor li arola likarolo tsa potoloho ho tloha lerata la tse ling, ha li-bypass capacitor li thibela lerata le phahameng ho ea fatše. Ha e le hantle, mantsoe ana ka bobeli a atisa ho hlalosa li-capacitor tse behiloeng haufi le lithapo tsa motlakase tsa IC ho fana ka tefiso ea lehae le lerata la sefa.

Bohlokoa ba ho Beha Moqapi oa PCB

Katleho ea ho kopanya e itšetlehile haholo ka ho beha. Li-capacitor li tlameha ho lula haufi ka hohle kamoo ho ka khonehang ho IC matlapa a nang le mesaletsa e khuts'oane, e sephara ho fokotsa inductance ea loop. Ho se behoe hantle ho hana melemo ea ho sefa ea capacitor maemong a holimo.

4.4 Ho kopanya le ho thibela matšoao

Ho feta AC Ha U ntse U Thibela DC

Li-capacitor tse kopanyang li fetisetsa lipontšo tsa AC pakeng tsa mekhahlelo ea potoloho ha li ntse li thibela DC bias voltages. Sena se lumella mohato o mong le o mong hore o sebetse sebakeng sa oona se nepahetseng sa DC ntle le ho ama methati e haufi, ea bohlokoa ho amplifier le li-circuits tsa ts'ebetso ea matšoao.

Amplifier le Lisebelisoa tsa RF

Ka li-amplifiers tsa molumo, li-capacitor tse kopanyang li thibela li-offsets tsa DC hore li fihlele libui. Lipotolohong tsa RF, li arola marang-rang a khethollo ea DC litseleng tsa matšoao. Khetho ea boleng ba capacitor e etsa qeto ea sebaka sa ho fokotsa maqhubu a tlase bakeng sa phetiso ea matšoao.

4.5 Ho boloka nako le ho sisinyeha

RC Networks

Marang-rang a Resistor-capacitor (RC) a etsa hore ho be le ho lieha ha nako ho itšetlehileng ka nako ea nako ea RC. Capacitor e tjhaja ka sehanyetsi ka sekhahla se khethiloeng ke boleng ba bona, se nolofalletsang taolo e nepahetseng ea nako ho lipotoloho tsa ho lieha, ho theola, le sebopeho sa waveform.

Lipotoloho tsa oache le li-oscillator

Li-circuits tsa oscillator li sebelisa li-capacitor tse nang le likristale kapa li-inductors ho beha maqhubu a ts'ebetso. Li-oscillator tsa RC li hlahisa lioache tsa maqhubu a tlase, ha LC le li-oscillator tsa kristale li fihlella ho nepahala ho holimo. Ho mamellana ha capacitor ka ho toba ho ama botsitso ba maqhubu.

4.6 Tokiso le Resonance

LC Resonant Circuits

Li-inductors le li-capacitor li theha li-circuits tse resonant tse arabelang ka matla ka maqhubu a itseng. Ha resonance, potoloho e bonts'a impedance e phahameng kapa e fokolang ho latela letoto kapa tlhophiso e ts'oanang. Thepa ena e nolofalletsa khetho ea khafetsa ho li-filters le li-tuner.

Likopo tsa RF

Li-circuits tsa RF li sebelisa haholo resonance ea LC bakeng sa ho bapisa li-antenna, ho sefa li-bandpass le ho kopanya khafetsa. Li-capacitor tse feto-fetohang kapa li-varactor diode li lumella tokiso ea elektroniki ho pholletsa le lihlopha tsa maqhubu, a bohlokoa lits'ebetsong tsa puisano tse se nang mohala.

4.7 Phokotso ea Lerata le Taolo ea EMI

EMI/EMC Filtering Networks

Li-Capacitor li theha likarolo tsa bohlokoa ho li-filters tsa EMI, tse thibelang lerata le phahameng haholo hore le theohe fatše pele le ka khantša kapa la tsamaisa lipotoloho tse ling. Ha li kopantsoe le li-inductors, li theha li-filters tse tlase tse fokotsang tšitiso ea motlakase ha li ntse li fetisa matšoao a lakatsehang.

5. Mefuta e Tloaelehileng ea Capacitor le Litšobotsi tsa Tsona

5.1 Ceramic Capacitors (MLCC)

Lihlopha tsa Dielectric: NP0/C0G, X7R, Y5V

Li-capacitor tsa ceramic li sebelisa mekhoa e fapaneng ea dielectric. NP0/C0G e fana ka botsitso bo botle ka coefficient ea mocheso e batlang e le lefela. X7R e fana ka bokhoni bo phahameng ka botsitso bo itekanetseng. Y5V e eketsa bokhoni empa e bontša phapang e kholo ka mocheso le motlakase.

Melemo le Mefokolo

Li-MLCC li fana ka boholo bo nyane, ESR e tlase, le ts'ebetso e ntle haholo ea maqhubu a holimo. Leha ho le joalo, li-ceramics tsa Sehlopha sa II / III li lahleheloa ke matla tlas'a khethollo ea DC le mocheso o feteletseng. Li ka boela tsa hlahisa lerata le utloahalang lipotolohong tsa matla ka lebaka la liphello tsa piezoelectric.

dikopo

Li-MLCC li laola li-decoupling, ho sefa ha maqhubu a phahameng, le lits'ebetso tsa nako. Mefuta ea NP0 e lumellana le lipotoloho tse nepahetseng; X7R e sebetsa bakeng sa ho kopanya ka kakaretso. Mehato ea bona e menyenyane e li etsa hore li tšoanelehe bakeng sa meralo e teteaneng ea PCB ho lisebelisoa tsa elektroniki tsa bareki le tsa indasteri.

5.2 Li-Electrolytic Capacitors

Kaho ea Aluminium Electrolytic

Aluminium electrolytic capacitor sebelisa oxide layer holim'a foil ea aluminium joalo ka dielectric, e nang le mokelikeli kapa polymer electrolyte e fanang ka electrode ea bobeli. Kaho ena e fihlella boleng bo phahameng haholo ba bokhoni ka liphutheloana tse nyane.

Litšobotsi le Polarity

Li-capacitor tsena li entsoe ka polarized - reverse voltage e li senya, e ka 'nang ea e-ba mabifi. Li bontša ESR e phahameng ho feta lirafshoa 'me li na le nako e fokolang ea bophelo ka lebaka la mouoane oa electrolyte. Mocheso o ama haholo bokhoni le bophelo bohle.

Tlhophiso ea Phepelo ea Matla

Ho sefa ka bongata phepelong ea motlakase ho emela ts'ebeliso ea mantlha ea li-electrolytic tsa aluminium. Bokhoni ba bona bo phahameng bo boreletsa AC mme bo fana ka polokelo ea matla bakeng sa meroalo ea nakoana. Ho fokotseha ho nepahetseng ha motlakase ho eketsa bophelo ba ts'ebetso.

5.3 Tantalum Capacitors

Botsitso le Melemo ea Boholo

Li-capacitor tsa Tantalum li fana ka bokhoni bo tsitsitseng liphuthelong tse nyane. Li sebelisa dielectric tsa tantalum pentoxide, tse fanang ka katleho e ntle ea volumetric ho feta li-electrolytic tsa aluminium. ESR e tlase le nako e telele ea bophelo li etsa hore li lokele lits'ebetso tse boima.

Tšepahala le Derating

Li-capacitor tsa Tantalum li ka felloa ke nako e khuts'oane haeba li imetsoe haholo, li baka likotsi tsa mollo. Ho fokotseha ho isa ho 50% ea motlakase o lekantsoeng ho ntlafatsa ts'epahalo haholo. Mefuta ea sejoale-joale ea polymer tantalum e fana ka mekhoa e metle ea ho hloleha le polokeho e ntlafalitsoeng.

dikopo

Li-module tsa motlakase, lisebelisoa tsa mehala, le lisebelisoa tsa elektronike tsa bongaka li sebelisa li-capacitor tsa tantalum moo polokelo ea matla e tsitsitseng e hlokahalang. Li sebetsa hantle haholo lits'ebetsong tse hlokang ts'ebetso e tsitsitseng ho feta mefuta e mengata ea mocheso.

5.4 Li-Capacitor tsa lifilimi

High tšepahala le botsitso

Li-capacitor tsa lifilimi li sebelisa lifilimi tsa polasetiki (polyester, polypropylene) e le dielectric. Li fana ka botsitso ba nako e telele, tahlehelo e tlase, le bokhoni ba ho ipholisa. Ts'ebetso ea bona e lula e tsitsitse ho pholletsa le mocheso le maqhubu.

Likopo tsa likoloi le tsa indasteri

Likoloi tsa makoloi, tokiso ea matla, le lisebelisoa tsa elektronike tsa likoloi li itšetlehile ka li-capacitor tsa lifilimi bakeng sa ho tšepahala ha tsona tlas'a maemo a thata. Li sebetsana le maqhubu a phahameng a ripple le li-spikes tsa voltage ntle le ho senyeha, e leng se etsang hore e be tse loketseng tikoloho ea indasteri.

5.5 Supercapacitors

Mokhoa o Phahameng oa Polokelo ea Matla

Li-Supercapacitor (li-ultracapacitor) li boloka matla ka matla a electrostatic double-layer capacitance kapa pseudocapacitance. Ba fihlella boleng ba matla ho farads - makhetlo a limilione ho feta li-capacitor tse tloaelehileng - ho koala lekhalo pakeng tsa li-capacitor le libeteri.

Backup Power Applications

Lioache tsa nako ea 'nete, ho boloka memori, le lisebelisoa tse khutšoane tsa ho boloka matla li sebelisa li-supercapacitor. Li tjhaja le ho hlabolla ka potlako, li sebetsana le liesekele tse limilione, 'me li boloka datha ka ho sitisoa ke matla hakhutšoanyane ntle le ho hlokomela libeteri.

5.6 Li-Capacitors tse khethehileng

Li-Capacitors tsa High-Voltge le Safety

Li-capacitor tsa ceramic tse nang le matla a phahameng a matla li sebetsa lisebelisoa tsa motlakase le li-transmitters tsa RF. Li-capacitor tsa polokeho (Sehlopha sa X / Y) li kopana le litlhoko tse khethehileng tsa mokhoa oa ho hloleha bakeng sa lits'ebetso tse amanang le mohala, ho netefatsa ts'ebetso e bolokehileng le haeba capacitor e hloleha. Li-capacitor tsa sehlopha sa Y li hloleha ho potoloha, ho thibela likotsi tse ka bang teng.

6. Key Capacitor Parameters U Lokela ho Utloisisa

6.1 Bokhoni

Capacitance, e lekantsoeng ka farads (hangata microfarads, nanofarad, kapa picofarads), e bontša bokhoni ba ho boloka tefiso. Khetha bokhoni bo ipapisitseng le litlhoko tsa polokelo ea matla, litlhoko tsa ho sefa, kapa lintlha tsa potoloho ea nako. Bokhoni ba 'nete bo fapana ho ea ka mocheso, motlakase le maqhubu.

6.2 Voltage Rating

Tekanyetso ea Voltage e bolela matla a phahameng a ho sebetsa a bolokehileng. Ho feta sena ho senya dielectric, ho baka ho hloleha. Ka linako tsohle kheloha-hangata ho 50-80% ea motlakase o lekantsoeng-bakeng sa ho tšepahala. Nahana ka li-spikes tsa nakoana tse ka fetang voltage ea boemo bo tsitsitseng.

6.3 ESR (Equivalent Series Resistance)

ESR e emela tahlehelo eohle e hanyetsang ka har'a capacitor. ESR e tlase e ntlafatsa ts'ebetso ea ho sefa le ho fokotsa tlhahiso ea mocheso. Ho fokotsa maqhubu a phahameng le ho sefa phepelo ea motlakase ho hloka li-capacitor tsa ESR tse tlase. ESR e eketseha ha li-capacitor li ntse li hōla kapa li sebetsa ka mocheso o feteletseng.

6.4 ESL (Equivalent Series Inductance)

ESL e fokotsa ts'ebetso ea maqhubu a phahameng, e etsa hore capacitor e be inductive ka holim'a maqhubu a eona a ikemetseng. Liphutheloana tse nyane le litekanyo tse khutšoane li fokotsa ESL. Bakeng sa ho fokotsa maqhubu a phahameng a sebetsang hantle, khetha li-capacitor tse nang le ESL tse loketseng sebaka seo u batlang ho se etsa.

6.5 Leakage Current

Hona joale leakage e phalla ka dielectric leha e sebelisoa ke DC. Leakage e phahameng e hula libeteri 'me e ama li-circuits tse nepahetseng. Li-electrolytic capacitor li bonts'a ho lutla ho hoholo ho feta mefuta ea lifilimi kapa tsa ceramic. Leakage e eketseha ka mocheso le motlakase o sebelisoang.

6.6 Mamello

Mamello e bontša hore na bokhoni ba sebele bo ka kheloha bokae ho boleng ba lebitso. Lipotoloho tsa nako e nepahetseng li hloka mamello e thata (± 1-5%); ho arohana ka kakaretso ho amohela mamello e pharaletseng (± 10-20%). Ho mamellana ho thata hangata ho eketsa litšenyehelo.

6.7 Mocheso Coefficient

Mocheso oa mocheso o hlalosa phetoho ea capacitance le mocheso. Li-ceramics tsa NP0/C0G li boloka matla ho pholletsa le mocheso; X7R e fapana ± 15%; Y5V e ka fetoha + 22/-82%. Khetha litšobotsi tse loketseng tsa mocheso sebakeng sa hau sa ts'ebetso.

6.8 Karabelo ea Khafetsa

Impedance e fapana ho ea ka makhetlo a mangata, e fihla bonyane ka makhetlo a ikemetseng. Ka holim'a maqhubu ana, ESL e busa 'me impedance ea eketseha. Ho utloisisa karabelo ea khafetsa ho thusa ho khetha li-capacitor tse fanang ka sefa se sebetsang ho maqhubu a shebiloeng.

6.9 Ripple Current Rating

Tekanyetso ea hona joale ea Ripple e bolela boholo ba AC hajoale eo capacitor e ka e sebetsanang ntle le ho chesa haholo. Ho fetola lisebelisoa tsa motlakase le li-drive tsa makoloi ho hloka li-capacitor tse nang le litekanyetso tse lekaneng tsa hona joale. Ho feta tekanyo ena ho potlakisa botsofali mme ho ka baka ho hloleha.

7. Li-Capacitors ho PCB Design le Kopano

7.1 Mekhoa e Metle ea ho Beha

Mesaletsa e Mekhutšoane le Ho Bea ha Haufi

Li-decoupling capacitor li tlameha ho hokela ho lithakhisa tsa motlakase tsa IC ka mesaletsa e khuts'oane ka ho fetesisa. Mesaletsa e telele e eketsa inductance e hlolang ho sefa ha maqhubu a holimo. Beha li-capacitor ka har'a 3mm ea likhoele tsa matla, hantle sebakeng se le seng kapa ka tlase ho IC.

Ho fokotsa Loop Inductance

Loop ea hona joale ho tloha pineng ea matla ho ea ka capacitor ho ea fatše e etsa qeto ea ho sefa ka katleho. Sebelisa litsela tse pharaletseng kapa lifofane, beha vias haufi le li-capacitor pads, 'me u boloke sebaka sa loop sa motlakase se le senyenyane. Litsela tse ngata ka pad li fokotsa ka inductance.

7.2 Mefuta ea Liphutheloana le Mehato

Mefuta e tloaelehileng ea SMD: 0402, 0603, 0805

Liphutheloana tse nyane (0402, 0201) li fana ka ESL e tlase mme li boloka sebaka empa li fokotsa matla le litekanyetso tsa motlakase. Liphutheloana tse kholoanyane (0805, 1206) li amohela litekanyetso tse phahameng le li-voltage. Bapisa boholo ba sephutheloana le litlhoko tsa motlakase le bokhoni ba ho kopanya.

Size vs. Performance Trade-offs

Li-capacitor tse nyane li fana ka ts'ebetso e ntle ea maqhubu a holimo empa li ka hloka li-unit tse ngata ho fihlela bokhoni bo hlokahalang. Nahana ka tlhahiso ea kopano-likarolo tse nyane haholo li eketsa bothata ba ho beha. Leka-lekanya ts'ebetso ea motlakase le ts'ebetso ea tlhahiso.

7.3 Soldering le Mehopolo ea Kopano

MLCC Cracking Thibelo

Li-ceramic capacitor li phunyeha tlas'a khatello ea mochine ho tloha boto ho fetoha, ho fetoha ha mocheso ka potlako, kapa ho tšoaroa ka tsela e sa lokelang. Qoba ho beha MLCC haufi le mephetho ea boto, li-tab tse arohaneng, kapa masoba a kenang. Sebelisa flexible termination capacitor lits'ebetsong tse hatisitsoeng ke mochini.

Reflow vs. Wave Soldering

Reflow soldering e lumellana le li-capacitor tsa SMD tse nang le li-profiles tse laoloang tsa mocheso tse thibelang ho sisinyeha ha mocheso. Wave soldering e hloka mokhoa o nepahetseng ho thibela moriti le tombstoneing. Litekanyo tsa mocheso li tlameha ho lula ka har'a li-capacitor ho thibela ho phatloha.

7.4 Quality Control ho PCBA

Mekhoa ea ho Leka

Tlhahlobo e kenang e netefatsa boleng ba capacitance mme ESR e kopana le litlhaloso. Teko ea potoloho e tiisa kopano e nepahetseng. Lisebelisoa tse ling li hloka ho chesoa ho shebella liphoso tsa pele. Tlhahlobo e ikemetseng ea optical e lemoha ho beoa le liphoso tsa manonyeletso a solder.

Mekhoa e Tloaelehileng ea ho hloleha

Ho hloleha ha capacitor ho kenyelletsa lipotoloho tse bulehileng tse tsoang ho li-ceramics tse senyehileng, li-circuits tse khuts'oane ho tloha ho senyeha ha dielectric, le ho hoholeha ho tloha botsofaling. Khatello ea mocheso, overvoltage, le tšenyo ea mochini li baka ho hloleha ho hongata ha masimo. Mehaho e nepahetseng ea moralo e thibela ho hlōleha pele ho nako.

8. Likopo tsa Li-Capacitor ho Li-Elektronike tsa Kajeno

8.1 Lisebelisoa tsa Elektronike tsa Bareki

Li-smartphone, li-laptops, le matlapa a sebelisa li-capacitor tse likete bakeng sa taolo ea matla, boemo ba matšoao le ho sebetsa ha molumo. Miniaturization e tsamaisa tlhokahalo ea liphutheloana tse nyane tse nang le bokhoni bo phahameng. Li-capacitor tsa boemo bo tlase li nolofalletsa meralo ea lisebelisoa tse tšesaane.

8.2 Likopo tsa likoloi

Lisebelisoa tsa elektronike tsa likoloi li tobana le mocheso o feteletseng, ho thothomela le ho feta ha motlakase. Li-capacitor tse tšoanelehang tsa AEC-Q200 li fihlela litlhoko tsa ts'epahalo ea koloi. Likarolo tsa taolo ea enjine, lits'ebetso tsa infotainment, le li-module tsa ADAS li hloka li-capacitor tse fetisitsoeng ho -40°C ho ea ho +125°C ts'ebetso.

8.3 Lisebelisoa tsa Bongaka

Lisebelisoa tsa elektroniki tsa bongaka li hloka ts'epo e phahameng le bophelo bo bolelele ba ts'ebetso. Lisebelisoa tse kentsoeng li sebelisa li-capacitor tse nang le ho lutla haholo. Lisebelisoa tsa ho hlahloba li hloka li-capacitor tse tsitsitseng, tse nepahetseng bakeng sa litekanyo tse nepahetseng. Biocompatibility le sterilization li tsamaisana li eketsa litšitiso.

8.4 Telecom le RF

Liteishene tsa motheo, lisebelisoa tsa marang-rang, le li-module tsa RF li sebelisa li-capacitor tse phahameng tsa Q bakeng sa ho sefa le ho lokisa. Lisebelisoa tsa 5G li hloka li-capacitor tse nang le ts'ebetso e ntle haholo ea maqhubu a holimo. Li-amplifiers li hloka li-capacitor tse sebetsanang le maqhubu a phahameng a ripple.

8.5 Matla a Elektronike

Li-inverters, li-converter le lisebelisoa tsa motlakase li sebelisa li-capacitor tse ngata bakeng sa ho boloka matla le ho sefa. Li-capacitor tsa lifilimi li sebetsana le lihokelo tsa DC tse nang le matla a phahameng a matla ho li-drive tsa indasteri. Tekanyetso e nepahetseng ea hona joale ea ripple le ho fokotseha ha motlakase ho netefatsa ts'ebetso e tšepahalang lits'ebetsong tse hlokang matla.

8.6 IoT le Lisebelisoa

Lisebelisoa le lisebelisoa tsa IoT tse tsamaisoang ke betri li etelletsa pele boholo bo bonyenyane le ho lutla ho tlase. Li-capacitor tse nyane haholo li thusa miniaturization ha li-supercapacitor li fana ka kotulo ea matla le matla a ho boloka. Meralo ea matla a tlase e fokotsa palo ea capacitor ho fokotsa litšenyehelo le sebaka sa boto.

9. Kakaretso: Ke Hobane'ng ha Li-Capacitor li le Bohlokoa ho PCB Design

9.1 Lintlha tse ka sehloohong tse nkiloeng

Li-capacitor li etsa mesebetsi ea bohlokoa potolohong e 'ngoe le e' ngoe ea elektronike-ho tloha ho sefa matla le ho kopanya ho ea ho nako le ho kopanya lipontšo. Ho utloisisa mefuta ea capacitor, liparamente le boits'oaro ho thusa khetho ea likarolo tse nang le tsebo. Sesebelisoa se seng le se seng se hloka litšobotsi tse khethehileng tsa capacitor bakeng sa ts'ebetso e nepahetseng.

9.2 Bohlokoa ba Khetho le Ho Bea

Khetho e nepahetseng ea capacitor e nka bokhoni, tekanyo ea motlakase, ESR, ESL, litšobotsi tsa mocheso le boholo ba sephutheloana. Ka mokhoa o ts'oanang, ho beoa ka nepo ha PCB ho netefatsa hore li-capacitor li fana ka ts'ebetso ea tsona e reriloeng. Mesaletsa e khuts'oane, loop inductance e nyane, le mehato e nepahetseng e holisa ts'ebetso ea ho sefa.

9.3 Litaba tsa Boiphihlelo bo Sebetsang

Ha re sebetsa le li-capacitor letsatsi le letsatsi tlhahisong le kopanong ea PCB ho Highleap Electronics, re bona kamoo liqeto tsa khetho ea likarolo le ho beha li amang boleng ba sehlahisoa. Ho kenngoa tšebetsong ha li-capacitor ka nepo ho tlatsetsa ho lisebelisoa tsa elektroniki tse tšepahalang le tse sebetsang hantle tse fihlelang litebello tsa bareki lits'ebetsong tse fapaneng.