Umhlangano we-PCB we-Network Switch: Ukuhlolwa kwe-Ethernet, i-PoE kanye ne-Port

I-Network Switch PCB Assembly e-Highleap Electronics iletha ukwenziwa kwe-PCB okusheshayo, ukutholakala kwezingxenye, inani le-SMT/THT, uhlelo lwe-IC kanye nokuhlolwa kwechweba okuchazwe uhlelo lokusebenza kuphrojekthi eyodwa yokukhiqiza. Uma inkampani yakho isivele ine- switch ye-Ethernet ephethwe , i-PoE switch noma idizayini yokushintsha inethiwekhi yezimboni, i-Highleap ingabuyekeza iphakheji yehadiwe ukuze ithole i-prototype, i-pilot kanye nokukhiqizwa kwe-PCBA okuphindaphindiwe. Umgomo ibhodi lenethiwekhi elingakhiqizwa, elilungiselelwe kahle—hhayi i-PCB ejwayelekile egcwele izingxenye.

Umthengi othenga i-PCBA ye-PoE enamachweba angu-24 udinga izimpendulo mayelana nokungaphezu kokushintshwa kwe-soldering: Ingabe i-fab ingakwazi ukugcina i-stack-up evunyiwe yesivinini esiphezulu? Ingabe i-switch ASIC, i-PHY kanye ne-magnetics zifanelana ne-BOM ekhishwe? Ingabe amakheji e-RJ45 kanye ne-SFP ahambisana ngomshini? Ingabe ifektri ingahlela amakheli e-MAC afanele kanye nesithombe se-firmware futhi iqinisekise yonke imbobo egcwele ngaphansi kwendlela yokuhlola evunyelwene ngayo? Leyo yimibuzo okufanele inqume ububanzi besilinganiso somkhiqizi we-PCBA ye-switch yenethiwekhi.

Umhlangano we-PCB Wokushintsha Inethiwekhi Womkhiqizo Oqondile Owakhayo

I-Highleap ingahlola izidingo zokuhlanganisa izinkinobho ze-Ethernet ezilawulwayo nezingalawulwayo, izinkinobho zenethiwekhi ye-PoE, imishini yokushintsha yezimboni kanye namabhodi okuxhumana aseduze. Ukucushwa okulandelayo kuchaza izidingo ezivamile zokuthola i-OEM kunemikhiqizo engekho eshelufini ethengiswa yi-Highleap.

Lawa amathuba okukhiqiza ahlobene, hhayi izincazelo ezishintshashintshayo. Iswishi yezimboni engenafeni enamachweba ayisishiyagalombili akufanele ithole izibikezelo ezifanayo zokuhlola nokufakwa njengeswishi ephethwe ngabantu abaningi, futhi iswishi efakwe amakheji e-SFP28 akufanele ithathwe njengefanelekela isivinini esithile somugqa ngoba nje isixhumi siyafanelana.

Ama-Stack-Ups e-PCB asheshayo, Ukubekwa kwe-BGA kanye nokunemba kwe-Interface

Kwi-PCB yokushintsha inethiwekhi, umdwebo wokwenziwa uyingxenye yencazelo yesignali-ubuphelele. I-Stack-up, i-laminate Dk/Df, ubulukhuni bethusi, i-trace/space geometry, ukuqhubeka kwe-reference-plane, ukubhoboza kanye ne-solder-mask geometry kungathinta i-link margin. Ukulahlekelwa okuvumelekile kanye ne-impedance kunqunywa yi-PHY/SerDes yangempela, i-connector kanye ne-channel budget—hhayi ngomthetho wokubalwa kwezingqimba ojwayelekile.

Lokho okubuyekezwa yi-Highleap ngaphambi kokukhishwa kwe-CAM

• Kuvunyelwe ukwakhiwa kwe-PCB ngesivinini esikhulu ukuhlanganiswa kanye nokuthi zonke iziteshi ezibalulekile ze-serial kanye ne-Ethernet zisebenzisa yini izinto ezihlosiwe kanye nendiza yokubhekisela.
• Impedance ecacisiwe enesiphelo esisodwa/ehlukile, izakhiwo zekhuphoni zokuhlola kanye nokubekezelelana kokwenziwa njengengxenye ukukhiqizwa kwe-impedance elawulwayo.
• Ukuqhuma kwe-BGA, ama-microvia, izidingo ze-via-in-pad kanye nezidingo ze-plating/fill lapho HDI PCB ubuchwepheshe isetshenziselwa ama-ASIC noma ama-processor aqinile.
• Unyawo lwe-magnetics lwe-RJ45, i-geometry yesixhumi esifanelana nokucindezela/esingena emgodini, ukubekwa kwekheji le-SFP, isisekelo sesivikelo kanye nokulungiswa kweshasi.
• Indawo yokuxhumana ye-heat-spreader noma i-heat-sink, ama-ground pad amakhulu kanye nendawo yokufinyelela yokuhlola i-X-ray lapho ukuxhumana kwe-solder kufihliwe khona.

Izixhumi ze-Ethernet twisted-pair zivame ukusebenzisa ukusayinda okuhlukile, kodwa i-target impedance evunyiwe kanye nendawo yokuhlola kumele kuvele kumklamo. Inkulumo ethi “100-ohm Ethernet” ayichazi yonke i-trace, yonke isiteshi noma imfuneko ephelele ye-SerDes. Ngokufanayo, izilinganiso ze-TDR ziwusizo ku-impedance ephawulekayo; izimangalo zokufakwa-ukulahlekelwa kanye nokubuyiselwa-ukulahlekelwa zidinga ukuhlolwa kwesizinda semvamisa noma isiteshi esifanele, hhayi nje ukuhlolwa okubonakalayo.

Ukwenziwa kwe-PCB ye-Highleap enezingqimba eziningi kanye ne-SMT encishisiwe kanye nokuhlanganiswa kobuchwepheshe obuxubile kungahlanganiswa ndawonye, ​​okuvumela ukwakheka kwamaphedi, ukwakheka kwamaphaneli, amaphakheji e-BGA kanye nokuphathwa kwezixhumi ukuthi kubuyekezwe ngaphambi kokuba izingxenye zithengwe.

Izabelomali Zamandla e-PoE, Ubuningi Bezimbobo kanye Nokulawulwa Kokushisa

Ukuhlanganiswa kwe-PCB yeswishi ye-PoE kunezela uhlelo lwesibili olusebenzayo kuswishi: ukutholakala kwamandla nokuvikelwa. I-OEM kumele ibone ukuthi ihadiwe ye-PSE ingaletha amandla angakanani nge-port ngayinye nakuwo wonke umkhiqizo, ukucushwa kwesilawuli okuvunyiwe, kanye nezimo zokuhlola. Ungacaphuni iswishi ye-PoE enamachweba angu-24 ngosayizi we-PCB kuphela.

Imindeni ye-IEEE 802.3af/at/bt ichaza izigaba zamandla ze-PSE ezahlukene. Amazinga wamandla aphezulu avame ukukhonjwa ku-PSE afinyelela ku-15.4 W yohlobo 1, 30 W yohlobo 2, 60 W yohlobo 3 kanye no-90 W yohlobo 4; uhlelo olujwayelekile olufanele, ikilasi, ukuqaliswa kwe-port kanye nesabelomali samandla kumele kuhlolwe umkhiqizo wangempela. I-chassis enamachweba angu-24 ayilethi ngokuzenzakalelayo inani eliphezulu kuwo wonke amachweba ngesikhathi esisodwa. Isilinganiso sayo se-PSU, inqubomgomo yokwabiwa, ukwakheka kokushisa, izintambo kanye ne-firmware kumele kusekele isabelomali esiphelele esimenyezelwe.

Izingxenye ezibalulekile njenge-switch ASICs, i-Ethernet PHYs, abalawuli be-PoE PSE, ama-magnetics, ama-oscillator kanye nezinkumbulo zesivinini esikhulu zingabusa ingozi yokuthenga. Ngaphansi kokuthola izingxenye ezisekelwe ku-BOM , uhlu lokuthenga oluhlongozwayo kufanele luhlukanise izingxenye ezigunyaziwe ezitholakalayo, izingxenye ezithunyelwe ngamakhasimende, ezinye ezivunyelwe ngumkhiqizi kanye nezinto ezingenakufakwa esikhundleni sazo ngaphandle kokukhishwa kwenye ihadiwe noma i-firmware.

I-Firmware, Ukuhlela Ikheli le-MAC kanye Nokuqinisekiswa Kwe-Port-by-Port

Ibhodi lokushintsha inethiwekhi elinabantu abaningi aliqediwe kuze kube yilapho ukucushwa kwalo kulawulwa futhi izixhumi zenethiwekhi ezicacisiwe ziqinisekisiwe. I-AOI ne-X-ray zingaveza amaphutha okuhlangana; aziqinisekisi ukuqaliswa kwendiza yokuphatha, izici ze-VLAN, ukuxhumana kwe-uplink, izinkomba ze-PoE noma izinkomba zephaneli yangaphambili.

I-Highleap inikeza izinsizakalo zokuhlela ze-IC kanye ne-firmware . Ukwakhiwa kwe-network-switch kungadinga i-bootloader noma ukulayisha i-flash, ifayela lokucushwa kwehadiwe, ukukhethwa kokubuyekezwa kwebhodi, ukwabiwa kwekheli le-MAC, izitifiketi zedivayisi noma izinombolo ze-serial. I-OEM kumele inikeze isithombe esivunyiwe kanye nemiyalelo yokulungiselela evikelekile. Okhiye abazimele, ama-lock bits angaguquki kanye nezihlonzi zokukhiqiza ezihlukile zidinga inqubo yokuphatha evunyiwe ngokwehlukile; akekho umlingani wokukhiqiza okufanele awasungule noma awasebenzise kabusha.

Ukuhlolwa kokukhishwa kufanele kufane namachweba angempela

1. I-Boot kanye nobunikazi: qinisekisa ukuqalisa okunamandla, isithombe/inguqulo ehleliwe, i-ID yedivayisi kanye nokubuyekezwa kwehadiwe eqoshiwe.
2. Amachweba ethusi: sebenzisa isivinini/i-duplex yesixhumanisi esibekiwe kanye nokuziphatha kwethrafikhi/i-loopback usebenzisa umhloli ovunyelwene ngawo kanye nemephu ye-port.
3. Izixhumanisi Eziphezulu: hlola ukusebenza kwesixhumi esibonakalayo se-SFP-family ngamamojula ahambisanayo achaziwe; ukuhambisana kwe-optical kanye nesivinini esikhulu kungadinga imishini eyengeziwe ngaphandle kwe-FCT eyisisekelo.
4. Amachweba e-PoE: qinisekisa ukutholwa/ukuhlukaniswa, amandla okukhipha noma imithwalo emele kanye nokuziphatha kokuvikela okubalulekile ngaphansi kwento evunyelwe.
5. Imisebenzi yokuphatha: hlola izixhumi ezidingekayo, ama-LED, ukusetha kabusha/ukubuyisela kanye nezinketho zokucushwa ezichazwe yiphrojekthi.

Ngokusebenzisa ukuhlolwa kokusebenza kwe-PCBA , i-Highleap ingaxoxa ngesimiso sokuhlola kanye nendlela yokwamukela nekhasimende. Ukusebenzisana okugcwele kwe-Ethernet, i-EMC yomkhiqizo, ukuhambisana ne-IEEE, ukuqinisekiswa kokuphepha kwe-cyber kanye nokuhlolwa kwelogo ye-PoE eqinisekisiwe kuyizindlela ezihlukile zokufaneleka komkhiqizo wokugcina, ezingasho lutho ngokuphumelela ukuhlolwa kokusebenza kwebhodi.

Isibonelo Sokukhiqiza i-PCBA Yokushintsha Inethiwekhi: Kusukela Kudatha ye-PCB Kuya Ekuqinisekisweni Kwechweba

Ukwakhiwa kwe-PCBA yeswishi yenethiwekhi kufanele kukhishwe ngokumelene nokucushwa kwehadiwe okuchaziwe, hhayi nje incazelo yenani le-port. Isibonelo, iswishi ye-PoE ephethwe ngama-port angu-24 ingafaka ibhodi lokushintsha eliyinhloko, isikhombimsebenzisi sokunikeza amandla, ibhodi lephaneli yangaphambili noma le-LED kanye nama-subsemblies angakhethwa noma angabaphathi. Omunye umklamo ungahlanganisa le misebenzi ku-PCB eyodwa. I-Highleap kufanele icaphune uhlu lwangempela lwebhodi kanye nobuningi kunokucabanga ukuthi yonke imikhiqizo yama-port angu-24 inokwakhiwa okufanayo.

Ngaphambi kokwenziwa kwe-PCB, i-OEM kufanele inikeze izidingo zokufakwa kwe-stack-up ezivunyiwe, izidingo ze-impedance, imininingwane ye-laminate, izisindo zethusi, imininingwane yokubhoboza kanye ne-backdrill lapho kufanele khona, izidingo ze-in-pad, ukubekezelelana kokwenziwa kanye nemiyalelo yekhuphoni yokuhlola. Ukubuyekezwa kobunjiniyela kufanele futhi kuhlole umzila wokuphunyuka we-BGA, ukuqhubeka kwendiza yereferensi, izinyathelo zokuxhuma, ama-magnetic e-RJ45, indawo yekheji le-SFP, isivikelo kanye nezixhumi ze-chassis. Noma yikuphi ukuguqulwa kwezinto eziphakanyisiwe noma ukushintshwa kwe-stack-up kumele kubuyekezwe ngokumelene nesiteshi somklamo kanye nesabelomali sokulahlekelwa ngaphambi kokukhishwa.

Izindawo zokuhlanganisa nokuhlola zebhodi lokushintsha

• Shintsha i-ASIC, i-PHY kanye nememori: qinisekisa izinombolo zezingxenye zomkhiqizi eziqondile, izinhlobo zephakheji, ukuma, izidingo zokunamathisela kanye nokubuyekezwa kwe-silicon okuvunyiwe.
• I-RJ45 kanye ne-magnetics: hlola ukuqondanisa kwesixhumi, ukusonta okuphakathi kwembobo, ukwesekwa kwemishini, imephu yephini kanye nohlelo olucacisiwe lokuhlola isixhumanisi.
• Izixhumi zomndeni we-SFP: qinisekisa ukubekwa kwekheji, imininingwane yesixhumi, ukuhambisana kwemodyuli kanye nomngcele wangempela wokuhlola we-optical noma kagesi.
• Isekethe ye-PoE: thola izinhlobo zokulawula ze-PSE, ukwabiwa kwembobo, isabelomali samandla, izingxenye zokuhlukanisa, izingxenye zokuvikela kanye nemithwalo yokuhlola emele.
• Ihadiwe yokushisa: chaza ukufakwa kwe-heatsink noma i-thermal-pad, izibikezelo zokugeleza komoya, ukuxhumana kwefeni kanye namaphuzu okulinganisa izinga lokushisa uma kudingeka.

I-AOI kanye ne-X-ray zibhekana nezidingo ezahlukene zokuhlolwa kwenhlangano; akukho okufakazela ngokuzimela i-Ethernet throughput, ubuqotho besiginali, ukusebenzisana kwe-PoE noma ukuhambisana nomkhiqizo. Ukuhlolwa kokusebenza kufanele kucacise amachweba asetshenziswayo, izindlela zokuxhumanisa ezisekelwayo, indlela yethrafikhi noma i-loopback, amamojula we-transceiver, izimo zomthwalo we-PoE kanye nemikhawulo yokudlula/yokwehluleka. Ukuhlolwa kokuhambisana nesiteshi esigcwele noma ukusebenzisana kungadinga imishini nezinqubo ezingaphezu kokuhlolwa kokusebenza kwe-PCBA okujwayelekile.

Yini eyenza ikhotheshini yokuhlanganisa i-network switch ifane?

Cela abaphakeli ukuthi basho okufanayo okulethwayo: ukwenziwa kwe-PCB engenalutho, ukuthengwa kwezingxenye, ukuhlanganiswa kwe-SMT/THT, ukuhlolwa kwe-BGA, ukulayishwa kwe-firmware, ukuhlinzekwa kwekheli le-MAC, ukuhlolwa kwe-port, izindleko ze-fixture, umsebenzi wokuvala kanye nokupakisha. Sho ukuthi yiziphi izinto eziyizindleko eziphindaphindayo ngeyunithi ngayinye nokuthi yiziphi izindleko zobunjiniyela noma ze-fixture ezingaphindaphindi. Lokhu kuvimbela ikhotheshini yokuhlanganisa kuphela ukuthi iqhathaniswe neyunithi ehlelwe futhi ihlolwe nge-turnkey njengokungathi iyizinsizakalo ezifanayo.

Ukukhiqiza kanye noku-oda okuphindaphindiwe kwemishini yenethiwekhi eyodwa

Kuma-OEM ehadiwe enethiwekhi, umhlinzeki ohlanganisiwe angaxhumanisa ukwakhiwa kwe-PCB, izingxenye, inani le-BGA/THT, i-firmware, ukuhlolwa kwe-port kanye nokufakwa kwezindlu ongazikhethela. Ukwakhiwa kwebhokisi le-Highleap kanye nokuhlanganiswa kwe-electromechanical kungahlolwa lapho umkhiqizo oqediwe uhlanganisa ama-LED ephaneli langaphambili, ukususwa kwezindlu ze-RJ45, amakheji e-SFP, ama-harnesses ekhebula, amafeni kanye nokulebula. Lokhu kuwusizo ikakhulukazi lapho ikhasimende lidlulisela iswishi esivele ivunyelwe noma umkhiqizo we-Ethernet wezimboni kusuka kuchungechunge lomhlinzeki oluhlukanisiwe.

Ama-oda aphindaphindwayo adinga ukukhululwa okuhlelekile: i-ASIC ne-PHY stepping, i-DDR noma i-flash variants, izilungiselelo ze-PHY strap, i-MAC address pool, isithombe se-boot, inguqulo yephaneli yangaphambili kanye nesofthiwe yokuhlola kumele ibhekisele ekwakheni okufanayo. Uma ingxenye eyodwa iba yi-EOL, ithimba lokuthenga kufanele liqhubeke ngaphambi kokushintshwa; i-Ethernet PHY ehambisana nephini ingase isadinga izinguquko esithombeni sesofthiwe, iwashi, ama-power rails noma i-link qualification.

I-Highleap ingacaphuna i-PCB engenalutho kuphela, ihlanganiswe kusetshenziswa i-silicon yenethiwekhi ehlanganisiwe, i-turnkey engaphelele, noma uhlelo oluhlanganisiwe lwe-PCB-to-unit. Imodeli ngayinye kufanele ibonise umthwalo wemfanelo wedatha yokuhlela, amathuluzi okuhlola, isitokwe eseqile kanye nokufaneleka komkhiqizo wokugcina.

Thola Isilinganiso Sokuhlanganiswa Kwe-PCB Ye-Network Switch

Thumela ukucushwa kwe-switch port yangempela kanye ne-BOM ekhishwe kanye nedatha ye-PCB. Isicelo esithi "ibhodi yokushintsha yenethiwekhi yama-port angu-48" kuphela sishiya i-assembler ingakwazi ukulinganisa izingxenye ezibizayo zomzila wokukhiqiza.

• I-PCB: amafayela okukhiqiza, ishadi le-impedance, i-stack-up evunyiwe kanye ne-laminate, ama-trace/amakhuphoni alawulwayo, uhlaka lwebhodi kanye nokufakwa kwamaphaneli.
• Umhlangano: i-BOM kanye nezinye izinto ezihambisanayo, izidingo zephakheji ye-BGA/PHY, ifayela le-centroid, imidwebo yesixhumi kanye nezixhumi ezihlanganisiwe.
• Ukucushwa: Imephu ye-port engu-1G/2.5G/10G/enye, uhlobo lwe-uplink, uhlobo lwe-PoE kanye nesabelomali esiphelele, isithombe se-firmware/boot, imithetho ye-MAC kanye ne-serial provisioning.
• Ukuqinisekiswa: isisetshenziswa sokuhlola, amamojula e-transceiver, imishini yokubhekisela, imikhawulo yethrafikhi yembobo, izidingo zomthwalo we-PoE, imibiko yokuhlola kanye nokulebula.
• Ukuhweba: inani lesampula yobunjiniyela, indawo yokuhlola, isibikezelo sonyaka, izingxenye ezithunyelwe kanye nesheduli yokulethwa okuqondiwe.

Izinketho Ezintathu Zokucacisa Ezishintsha Isilinganiso Se-PCBA Sokushintsha

Inani leembobo uma liqhathaniswa nesivinini sembobo: I-PCB yokushintsha i-Gigabit enamachweba angu-24 kanye ne-multi-gigabit switch enamachweba angu-24 ingadinga ama-ASIC ahlukene, ama-PHY, izingxenye zamagnetic, imishini yokuhlanganisa kanye nokuhlola. Chaza kokubili isivinini se-interface ye-Ethernet kanye nanoma yiliphi izinga lokuxhumanisa, hhayi nje “amachweba angu-24.”

Isilinganiso se-PoE esilinganiselwe uma kuqhathaniswa nomthwalo ohambisanayo: Umklamo weswishi we-PoE+ onamachweba anamandla ayisishiyagalombili awuwona umkhiqizo wokukhipha okuqhubekayo wamachweba ayisishiyagalombili angu-30 W ngokuzenzakalelayo. Thumela umthamo we-PSU, i-port allocation logic kanye nekesi lomthwalo ohambisanayo omkhulu ukuze ifektri ikwazi ukunquma ukuthi ukuzwela kwamanje, izixhumi zokushisa kanye ne-test fixture kusesilinganisweni.

Iyunithi yokushintsha ye-PCB kuphela uma kuqhathaniswa neyunithi yokushintsha ehleliwe: Izingcaphuno zokuhlanganisa kuphela azibandakanyi izinto ezithile amakhasimende ehadiwe yokuxhumana ye-turnkey avame ukuzidinga: ukulayisha kusengaphambili kwe-flash, ukusetha ikheli le-MAC, ukuhlolwa kwethrafikhi yembobo ye-Ethernet, ukuhlanganiswa kwefeni/i-chassis, ukulebula kanye nokucushwa kokuthunyelwa. Bhala uhlu ngalunye olungalethwa ukuze isilinganiso sihlukanise ngokucacile izindleko zaso zeyunithi eziphindaphindayo kuhlelo lokuhlola olungaphindaphindi kanye nokusethwa kohlelo.