Ukwakhiwa kwe-PCB ye-USB Hub Ethuthukisiwe kanye Nokuhlanganiswa Kwe-Turnkey
Umfanekiso 1. I-PCB Yehabhu Le-USB
Ihabhu ngalinye le-USB — kusukela ku-dongle yokuhamba engu-$10 kuya kuyunithi ye-rack engu-$500 yezimboni enamachweba angu-16 — lisebenza ku-PCB eyodwa ehlanganisa i-IC yesilawuli sehabhu, ukushintsha kwamandla nge-port, ukuvikelwa kwe-ESD, kanye nomzila wokuhlukanisa olawulwa yi-impedance. I-IC yehabhu oyikhethayo, i-stackup oyicacisayo, kanye nokwakheka kwamandla oyiklamayo kunquma ukuthi umkhiqizo uyaphumelela yini ekuqinisekisweni kwe-USB-IF kusampula yokuqala noma uyahluleka ekukhiqizweni. Lo mhlahlandlela ukunika izinombolo ezithile zezingxenye, imithetho ye-stackup, ububanzi bezindleko, kanye nemikhawulo yesakhiwo ukuze ukwenze kahle.
Okuqukethwe
- Ukukhethwa kwe-IC yesilawuli se-Hub: Inombolo ngayinye yezingxenye ezinkulu iqhathaniswa
- Ukwakhiwa Kwamandla: Okusebenzisa Ibhasi vs Okusebenzisa Amandla Omuntu Siqu vs Okusebenzisa I-USB-C PD
- I-PCB Stackup, Ukulawulwa Kwe-Impedance kanye ne-Differential Pair Routing
- Ukuvikelwa kwe-ESD, Ukuthobela i-EMC kanye Nokukhethwa Kwesixhumi
- Ukucushwa Komkhiqizo: Amachweba angu-4 kuya kwangu-16, Abathengi kuya Kwezimboni
- Ukwakhiwa Nokuhlanganiswa kwe-PCB ye-USB Hub
1. Ukukhethwa kwe-IC ye-Hub Controller: Inombolo ngayinye yezingxenye ezinkulu iqhathaniswa
I-hub IC ichaza isivinini se-USB, inani le-port, ikhono lokushaja, kanye no-60% wezindleko ze-BOM eziphelele. Ukukhetha i-IC engalungile kukukhiya kumininingwane yomkhiqizo engenakuguqulwa ngaphandle kokushintsha kwebhodi.
| I-Hub IC | Isivinini se-USB | Amaports | Iphakheji | Iswishi Nge-Port | I-BC1.2 | Okuhle kakhulu |
|---|---|---|---|---|---|---|
| I-Genesys GL850G | 2.0 (480 Mbps) | 4 | I-SSOP-28 | Ngaphandle | Cha | Isikhungo sabathengi esingabizi kakhulu, isikhungo sekhibhodi |
| I-Genesys GL852G | 2.0 | 4 | I-QFN-32 | Ngaphandle | Cha | Ihabhu encane, isiteshi sokushaja |
| I-Microchip USB2422 | 2.0 | 2 | I-QFN-36 | Ngaphakathi | Cha | Ihabhu ye-laptop efakiwe, isango |
| I-Microchip USB2517 | 2.0 | 7 | I-QFN-64 | Ngaphandle | Akuphoqelekile | Ihabhu ledeskithophu elinamachweba angu-7, i-KVM |
| I-Microchip USB5744 | 3.1 Gen 1 (5 Gbps) | 4 | I-QFN-64 | Ngaphakathi | Yebo | Ihabhu le-USB 3.0 elinokushaja |
| I-VIA VL817 | 3.1 Gen1 | 4 | I-QFN-76 | Ngaphandle | Cha | Idokodo le-USB 3.0, ihabhu lokuqapha |
| I-VIA VL822 | 3.2 Gen1 | 4 | I-QFN-100 | Ngaphandle | Cha | Isiteshi sokudokha se-USB-C |
| I-TI TUSB8044 | 3.1 Gen1 | 4 | I-BGA-144 | Ngaphandle | Akuphoqelekile | Isikhungo sezimboni/sobungcweti |
| I-TI TUSB8044-Q1 | 3.1 Gen1 | 4 | I-BGA-144 | Ngaphandle | Akuphoqelekile | Isikhungo sezimoto se-AEC-Q100 |
| I-Genesys GL3523 | 3.1 Gen1 | 4 | I-QFN-88 | Ngaphandle | Yebo | Ihabhu le-USB-C elinokudlula kwe-PD |
Uma kubalwa amachweba angaphezu kuka-7, faka ama-IC amabili e-hub cascade — elilodwa eliphakelayo ngomzuzwana. Lena yindlela wonke ama-hub e-USB anamachweba ayi-10, amachweba ayi-12, kanye namachweba ayi-16 akhiwa ngayo. Ama-VL817 amabili ku-cascade akhiqiza i-hub ye-USB 3.0 enamachweba ayi-8; ama-USB2517 amabili afaka i-hub ye-USB 2.0 enamachweba ayi-14.
Ngemikhiqizo enamachweba angaphansi kwe-USB-C asekela i-DisplayPort Alt Mode, hlanganisa i-hub IC nesilawuli se-USB-C (i-TI TUSB544 retimer, VIA VL103) esiphatha ukuxoxisana ngephinikhodi ye-CC kanye nokushintshwa komzila we-alt-mode. Izixazululo ze-single-chip hub + CC ziyavela kodwa zisalokhu zilinganiselwe enanini lechweba kanye nokuguquguquka.
Ama-IC e-BGA hub afana ne-TUSB8044 adinga ukuhlanganiswa kwe-BGA PCB ngokuhlolwa kwe-X-ray — qinisekisa leli khono ngaphambi kokukhetha i-IC ye-BGA-packaged hub.
2. Ukwakhiwa Kwamandla: Okusebenzisa Ibhasi vs Okusebenzisa Amandla Omuntu Siqu vs Okusebenzisa I-USB-C PD Input
Ukwakheka kwamandla kungumthombo wokuqala wokubuyiselwa kwemikhiqizo ye-USB hub. Ihabhu elisebenza ngebhasi elithembisa amachweba ama-4 kodwa elingakwazi ukunika amandla i-hard drive yangaphandle lithola isibuyekezo senkanyezi e-1. Thola isabelomali samandla ngaphambi kokuhlelwa.
Isebenza ngebhasi. Wonke amandla kagesi avela ku-host ephezulu: 500 mA max (USB 2.0) noma 900 mA max (USB 3.x). Ngemva kokusetshenziswa kwe-hub IC (~120 mA), imbobo ngayinye ye-hub enamachweba amane ithola cishe i-100–200 mA. Kwanele amagundane, amakhibhodi, ama-flash drive. Akwanele ama-HDD aphathekayo, ama-webcam anama-LED, noma yikuphi ukushaja.
Isebenza ngokwayo. I-adaptha yangaphandle (5 V / 2.5–5 A barrel jack, noma i-12 V ene-buck converter ebhodini). Imbobo ngayinye inikeza ugesi ophelele wemininingwane: 500 mA (USB 2.0), 900 mA (USB 3.x), noma 1.5–2.4 A ene-BC1.2 / Apple DCP / Qualcomm QC detection. I-IC yokushintsha amandla ngembobo ngayinye iyadingeka: TI TPS2042 (embili, 500 mA), TI TPS2052B (embili, 800 mA), Diodes Inc AP2176 (eyodwa, elungisekayo).
Okokufaka kwe-USB-C PD. Kuyanda izinga lemikhiqizo yekhwalithi ephezulu. Isilawuli se-USB-C PD (TI TPS65987, Cypress CYPD3177) sixoxisana nge-9 V, 15 V, noma 20 V kusuka kushaja, bese i-buck converter yehla iye ku-5 V ye-VBUS engezansi. Lokhu kwenza kokubili umsebenzi we-hub kanye ne-PD idlule ishaje kwi-laptop - umkhiqizo uba yisiteshi sokufaka ikhebula elilodwa.
Usayizi wethusi we-VBUS: ku-1 oz yethusi, vumela ububanzi be-trace obuyi-30 mil nge-ampere (ukuphakama okungu-10 °C). Ihabhu enamachweba angu-7 ku-900 mA ngechweba = 6.3 Isamba — sidinga i-trace engu-190 mil (4.8 mm) noma, cishe, indiza yamandla ye-VBUS ezinikele kungqimba lwangaphakathi. Kuma-hub okushaja kumachweba angu-2.4 A × 7 (16.8 A), i-PCB yethusi esindayo enezingqimba zangaphakathi ezingu-2 oz iyisisombululo esijwayelekile.
3. I-PCB Stackup, Ukulawulwa Kwe-Impedance kanye ne-Differential Pair Routing
Ama-USB 2.0 differential pairs (D+/D−) adinga ama-90 Ω ±10%. Ama-USB 3.x SuperSpeed pairs (TX/RX) adinga ama-90 Ω ±5%. Lawa ma-impedance target, ahlanganiswe ne-port count, anquma inani elincane kakhulu lezendlalelo:
| Uhlobo lomkhiqizo | Izinhla | isitaki | Indlela Yokuvimbela |
|---|---|---|---|
| I-USB 2.0, enamachweba amane, esebenza ngebhasi | 2 | I-Sig / GND | I-Microstrip ku-FR-4 |
| I-USB 2.0, imbobo engu-4–7, iyazisebenzela ngokwayo | 4 | I-Sig / GND / PWR / Sig | I-Microstrip, indiza ye-PWR ezinikele |
| I-USB 3.0, amachweba ama-4 | 4-6 | Sig / GND / Sig / PWR / GND / Sig | Umugqa we-strip ezingqimbeni zangaphakathi |
| Idokhi ye-USB-C (ihabhu + ividiyo + i-PD) | 6-8 | I-HDI enezimbobo ezingaboni/ezingcwatshwe | I-Stripline + i-HDI fanout |
| Isikhungo sezimboni esinezimbobo ezingu-16 | 6-8 | Izendlalelo zangaphakathi zethusi ezisindayo | I-Microstrip + izindiza ze-VBUS ezibanzi |
Ukufanisa ubude: ≤5 mil intra-pair ye-USB 3.x, ≤50 mil ye-USB 2.0. Gcina ama-SuperSpeed pair ezingqimbeni zangaphakathi phakathi kwezindiza ezimbili zomhlaba (umugqa westrip) ukuze uvikele. Dlulisa ama-USB 2.0 ezingqimbeni zangaphandle — okungabalulekile kakhulu ku-480 Mbps. Ungalokothi uhambise ama-USB pair ezingqimbeni zangaphandle ezihlukanisiwe — ukuphazamiseka kwamandla okubuya kubangela ukwehluleka kwe-EMI ngokushesha.
Kuma-hub e-USB anezingqimba ezine — ukucushwa kwevolumu ephezulu kakhulu — ukwenziwa kwethu kwe-PCB enezingqimba ezine kusebenzisa ama-stackup ajwayelekile alungiselelwe i-differential engu-90 Ω ku-prepreg engu-4 mil. Eziteshini zokufaka i-USB-C ezidinga izingqimba ezingu-6-8 ezine-fanaut ye-HDI, ikhono lethu le-HDI PCB lisekela ama-via abhobozwe nge-laser angu-0.1 mm.
Umfanekiso 2. Izixazululo ze-PCB ze-USB hub ezisebenza kahle kakhulu ezinenani lezimbobo ezingenziwa ngezifiso ezisukela kuma-port angu-2 kuya kwangu-16+ ezinhlelo zokusebenza zezimboni nezabathengi.
4. Ukuvikelwa kwe-ESD, Ukuthobela i-EMC kanye nokukhethwa kwe-Connector
Isixhumi ngasinye se-USB esibheke ngaphandle sidinga ama-diode e-ESD angaphakathi kuka-1.5 mm kusuka kumaphini esixhumi — ngaphandle kokukhetha. Umcimbi wokuqala we-ESD ongenasivikelo ubhubhisa i-hub IC.
I-USB 2.0 D+/D−: Uhlelo lwe-TVS, amandla ≤3 pF. I-TI TPD4S012, NXP IP4220CZ6, Nexperia PESD5V0U4BF.
I-USB 3.x TX/RX: Ama-TVS ane-Ultra-low-cap, ≤0.3 pF. TI TPD4S214, Diodes Inc DT1452-02. Ama-diode e-ESD ane-capacitance ephezulu anciphisa ama-diagrams wamehlo angu-5 Gbps ngaphansi kwemikhawulo yokuhambisana ne-USB-IF.
I-VBUS: I-Bidirectional TVS ilinganiswe ngo-5.5 V (noma ngaphezulu kwe-PD). I-Bourns CDSOT23-SM712.
Ngokuhambisana ne-EMC (umthengi we-FCC Class B, CE EN 55032): ama-common-mode chokes kubhangqa ngalinye le-USB anciphisa ukukhishwa kwe-radiation. I-Murata DLP21SN (USB 2.0), i-DLW32SH (USB 3.0). Beka ngemuva kwama-diode e-ESD, ngaphambi kwe-hub IC. Imiklamo eminingi ye-USB 2.0 hub yehluleka i-FCC ngaphandle kwama-CMC — engeza kusukela ekuqaleni kunokuba kube ukulungiswa kwangemva kokuqinisekiswa.
Izinhlobo zezixhumi ngohlelo lokusebenza: Uhlobo lwe-USB A lujwayelekile kuma-port angezansi kuma-consumer hubs. Uhlobo lwe-USB C lusetshenziswa kakhulu kuma-upstream (ukusingathwa) futhi ngezinye izikhathi ama-downstream (kuma-docks aphezulu). Uhlobo lwe-USB B aluvamile kodwa lusetshenziswa kweminye imishini yezimboni. I-Micro-USB upstream iyindala — gwema emiklamo emisha. Ukuze uthole ukuthembeka kwemishini yezixhumi emikhiqizweni engaphansi kwemijikelezo evamile yokuxhuma/ukukhipha i-plug, cabanga ngamathebhu okufaka imbobo edlulayo kunezixhumi ze-SMT ezimsulwa. Bheka umhlahlandlela wethu wezixhumi ze-PCB ukuze uthole imininingwane yokukhetha.
5. Ukucushwa Komkhiqizo: Amachweba ama-4 kuya kumachweba ayi-16, Abathengi kuya Kwezimboni
| Ukucushwa | I-Hub IC | PCB | I-BOM (ivolumu engu-10K) | Ibanga Lokuthengisa | Imakethe ehlosiwe |
|---|---|---|---|---|---|
| Isebenzisa ibhasi le-USB 2.0 elinamachweba amane | I-GL850G | Izingqimba ezi-2, 50×30 mm | $1.50–2.50 | $8–15 | Umthengi, ukuhamba |
| I-USB 2.0 enamachweba angu-4 iyazisebenzela ngokwayo | I-GL852G + TPS2042 | Izingqimba ezi-4, 55×35 mm | $2.50–4.00 | $15–25 | Ideskithophu, ihabhu yekhibhodi |
| I-USB 2.0 enamachweba angu-7 iyazisebenzela ngokwayo | I-USB2517 + 4× TPS2042 | Izingqimba ezi-4, 80×50 mm | $4.50–6.50 | $20–40 | Ideskithophu, isandisi se-KVM |
| I-USB 3.0 enamachweba amane | VL817 | Izingqimba ezi-4, 60×40 mm | $4.50–8.00 | $25–50 | Ideskithophu yobungcweti |
| Ukushaja kwe-USB 3.0 enamachweba amane + BC1.2 | USB5744 | Izingqimba ezi-4, 65×45 mm | $6.00–10.00 | $35–60 | Ihabhu yokushaja |
| I-USB-C 7-in-1 dock (ihabhu+HDMI+ETH+PD) | I-VL822 + VL103 + RTL8153 | I-HDI engu-6-8, 90×60 mm | $15–30 | $60–150 | Uchwepheshe weselula |
| I-USB 3.0 yezimboni enamachweba angu-8 | I-cascade engu-2 × VL817 | Izingqimba ezi-6, 150×80 mm | $18–35 | $150–350 | Ukuzenzakalela kwefektri, ikhiyoski |
| I-USB 3.0 yezimboni enamachweba angu-16 | I-cascade engu-2 × VL817-Q8 | Ithusi elisindayo elinezingqimba ezingu-8, 200×120 mm | $35–60 | $300–600 | Ipulazi ledivayisi, izimpawu, i-POS |
Uma izinga lokushisa linwetshiwe (−40 °C kuya ku-+85 °C): sebenzisa izingxenye zezinga lezimboni kanye ne -laminate ye-PCB ene-Tg ephezulu (Tg ≥ 170 °C). Kwezimoto: i-TI TUSB8044-Q1 iyona kuphela i-AEC-Q100-qualified USB 3.x hub IC enkulu.
Kwiziteshi zokufaka i-USB-C ezihlanganisa ihabhu, ividiyo, kanye nokushaja: i-PCB ihlanganisa ama-IC ahlukene angu-4-6 (ihabhu, i-USB-C CC, i-DisplayPort retimer, i-Ethernet PHY, isilawuli se-PD, i-audio codec). Lesi yisigaba somkhiqizo we-USB esiyinkimbinkimbi kakhulu — ukwakheka kudinga ukuhlukaniswa ngokucophelela kwezingxenye zamandla zedijithali ezisheshayo, umsindo we-analog, kanye namandla anamandla aphezulu ku-PCB.
Umfanekiso 3. I-PCB Yehabhu Le-USB
6. Ukwakhiwa Nokuhlanganiswa kwe-PCB ye-USB Hub
Izidingo ezintathu zokukhiqiza ziqondene ngqo nama-PCB e-USB hub futhi kumele ziqinisekiswe nomlingani wokukhiqiza ngaphambi koku-oda:
Ukuqinisekiswa kwe-Impedance. Yonke inqwaba yokukhiqiza kumele ifake ukuhlolwa kwekhuphoni ye-TDR ukuqinisekisa i-90 Ω ±5% (USB 3.x) noma i-±10% (USB 2.0) kuma-differential pairs. I-FR-4 dielectric constant iyahlukahluka ±5–10% phakathi kwezinto ezibonakalayo — ngaphandle kokuqinisekiswa kwekhuphoni, ukukhukhuleka kwe-impedance akubonakali kuze kube yilapho ukwehluleka kokuhlolwa kokusebenza kuqongelela. Ukwenziwa kwe-PCB elawulwa yi-Impedance e-Highleap kufaka phakathi ukuhlolwa kwe-TDR kuyo yonke i-oda le-impedance elawulwayo.
Ukuhlanganiswa kobuchwepheshe obuxubile. Amabhodi e-USB hub ahlanganisa izingxenye ze-SMT (i-hub IC, ama-diode e-ESD, amaswishi kagesi, ukuhlukanisa) nezingxenye ze-through-hole (izixhumi ze-USB Type-A, ama-barrel jacks). Ukulandelana kokuhlanganiswa: I-SMT iqala kabusha, bese kuba yi-selective wave solder ye-through-hole. Ukuguqula lokhu kulandelana kubangela amaphutha e-solder ohlangothini lwe-SMT. Ukuhlanganiswa kwe-Turnkey ngokuthola izingxenye ze-distributor ezigunyaziwe kususa ingozi ye-hub IC ye-hub mbumbulu ehlupha izintambo zokuphakelwa emakethe empunga.
Ukuhlolwa kokusebenza. Ihabhu ngalinye elihlanganisiwe kumele lihlolwe: Ukubalwa kwe-USB kuzo zonke izimbobo, ukudluliswa kwedatha ngesivinini esilinganiselwe, ukulethwa kwamanje ngephothi ngayinye, kanye nendawo yokuvikela ukudluliswa kwamandla kagesi. Ihabhu le-USB elithunyelwe ngaphandle kokuhlolwa kokusebenza lizoba nesilinganiso sokukhubazeka esifihliwe esingu-3–8% kusuka ekuhlanganisweni — amalunga e-cold solder, impedance engaphansi, izingxenye ezingekho. Izindleko zokulungisa lokhu ensimini yizindleko zokuhlola zasefektri ezingu-10–20×.
I-Highleap Electronics ikhiqiza ama-PCB e-USB hub kusukela kuma-prototypes amayunithi ama-5 kuya ekukhiqizweni okungu-100K+. Thumela umklamo wakho we-PCB ye-USB hub ukuze uthole isilinganiso — faka amafayela e-Gerber, i-BOM, ivolumu, kanye nobubanzi besitifiketi.
Okuhlobene: Indlela yokuhlola umenzi we-PCB wehabhu le-USB · Isixhumi se-USB-C ukuhlanganiswa kwe-PCB · Imikhiqizo yesandisi sembobo ye-USB · Umklamo wesiguquli se-USB · Izinhlelo zesandisi se-USB
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Ungasithola kanjani isilinganiso sama-PCB
Masikwenzele ukuhlaziya kwe-DFM/DFA futhi sibuyele kuwe ngombiko. Ungalayisha amafayela akho ngokuphephile ngewebhusayithi yethu. Sidinga ulwazi olulandelayo ukuze sikunikeze isaphulelo:
-
- Gerber, ODB++, noma .pcb, spec.
- Uhlu lwe-BOM uma udinga ukuhlangana
- Ubuningi
- Isikhathi sokushintsha
Ngokungeziwe ekwenziweni kwe-PCB, sinikeza uhla olubanzi lwezinsizakalo ze-elekthronikhi, okuhlanganisa i-PCB design, i-PCBA, nezixazululo ze-turnkey. Kungakhathaliseki ukuthi udinga usizo ngokwenza i-prototyping, ukuqinisekiswa kwedizayini, ukuthola ingxenye, noma ukukhiqizwa ngobuningi, sihlinzeka ngosekelo olusuka ekupheleni ukuze siqinisekise impumelelo yephrojekthi yakho.
Ngezinsizakalo ze-PCBA, sicela unikeze i-BOM yakho (I-Bill of Materials) kanye nanoma yimiphi imiyalelo ethile yomhlangano. Siphinde sinikeze ukuhlaziya kwe-DFM/DFA ukuze uthuthukise imiklamo yakho ukuze yenziwe futhi ihlanganiswe, ukuqinisekisa inqubo yokukhiqiza eshelelayo.