Raws li kev siv thev naus laus zis txuas ntxiv mus thiab cov cuab yeej siv tau yooj yim dua, kom ntseeg tau tias lub zog ruaj khov ua qhov tseem ceeb zuj zus.Qhov no yog qhov tseeb tshwj xeeb tshaj yog rau 6-txheej PCBs, qhov twg lub zog ruaj khov thiab teeb meem suab nrov tuaj yeem ua rau muaj kev cuam tshuam loj rau cov teeb liab kis tau tus mob thiab cov ntawv siv hluav taws xob siab. Hauv tsab ntawv blog no, peb yuav tshawb txog ntau lub tswv yim los daws cov teeb meem no.
1. Nkag siab txog kev ruaj ntseg fais fab:
Fais fab mov stability yog hais txog lub peev xwm los muab qhov voltage thiab tam sim no rau cov khoom siv hluav taws xob ntawm PCB. Ib qho kev hloov pauv lossis hloov pauv ntawm lub zog tuaj yeem ua rau cov khoom no ua haujlwm tsis zoo lossis puas. Yog li ntawd, nws yog ib qho tseem ceeb los txheeb xyuas thiab kho txhua yam teeb meem kev ruaj ntseg.
2. Txheeb xyuas cov teeb meem ntawm lub zog hluav taws xob:
Lub hwj chim mov suab nrov yog qhov tsis xav tau kev hloov pauv hauv qhov hluav taws xob lossis qib tam sim no ntawm PCB. Cov suab nrov no tuaj yeem cuam tshuam nrog kev ua haujlwm ib txwm muaj ntawm cov khoom siv rhiab, ua rau muaj kev ua yuam kev, ua haujlwm tsis zoo, lossis kev ua haujlwm tsis zoo. Txhawm rau zam cov teeb meem zoo li no, nws yog ib qho tseem ceeb uas yuav tau txheeb xyuas thiab txo cov teeb meem ntawm lub zog hluav taws xob.
3. Kev siv thev naus laus zis:
Ib qho ntawm cov laj thawj tseem ceeb ntawm cov khoom siv hluav taws xob ruaj khov thiab teeb meem suab nrov yog qhov tsis zoo hauv av. Kev siv cov txheej txheem hauv av kom zoo tuaj yeem txhim kho kev ruaj ntseg thiab txo cov suab nrov. Xav txog kev siv lub dav hlau hauv av ntawm PCB kom txo qis hauv av thiab ua kom muaj peev xwm siv tau zoo ib yam. Tsis tas li ntawd, siv cov dav hlau hauv av sib cais rau cov seem analog thiab digital tiv thaiv kev sib txuas suab nrov.
4. Decoupling capacitor:
Decoupling capacitors strategically muab tso rau ntawm PCB nqus thiab lim tawm cov suab nrov nrov, txhim kho kev ruaj ntseg. Cov capacitors no ua raws li lub zog hauv zos reservoirs, muab lub zog tam sim ntawd rau cov khoom siv thaum lub sijhawm muaj xwm txheej. Los ntawm kev tso cov khoom siv hluav taws xob nyob ze rau ntawm IC lub zog pins, qhov system stability thiab kev ua tau zoo tuaj yeem txhim kho tau zoo.
5. Tsawg impedance faib network:
Kev tsim cov hluav taws xob sib txuas qis impedance (PDNs) yog qhov tseem ceeb los txo cov suab nrov ntawm lub zog hluav taws xob thiab tswj kev ruaj ntseg. Xav txog kev siv cov kab dav dav lossis cov dav hlau tooj liab rau cov kab hluav taws xob kom txo qis impedance. Tsis tas li ntawd, tso cov hlais capacitors nyob ze ntawm lub hwj chim pins thiab ua kom lub zog luv luv tuaj yeem txhim kho qhov ua tau zoo ntawm PDN.
6. Lim thiab shielding tshuab:
Txhawm rau tiv thaiv cov teeb meem rhiab heev los ntawm lub suab nrov ntawm lub zog, nws yog ib qho tseem ceeb uas yuav tsum siv cov txheej txheem lim dej kom tsim nyog thiab tiv thaiv kev tiv thaiv. Siv lub lim dej qis kom txo qis lub suab nrov thaum tso cai rau lub teeb liab xav tau dhau mus. Kev ua raws li kev tiv thaiv kev tiv thaiv xws li cov dav hlau hauv av, tooj liab cladding, los yog cov kab thaiv thaiv tuaj yeem pab txo cov suab nrov txuas thiab cuam tshuam los ntawm lwm qhov chaw.
7. Independent fais fab txheej:
Hauv kev siv hluav taws xob siab, nws raug nquahu kom siv cov dav hlau fais fab sib txawv rau qib sib txawv. Qhov kev sib cais no txo qhov kev pheej hmoo ntawm cov suab nrov sib txuas ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv, ua kom cov khoom siv hluav taws xob ruaj khov. Tsis tas li ntawd, kev siv cov cuab yeej sib cais tsim nyog, xws li kev sib cais transformers lossis optocouplers, tuaj yeem txhim kho kev nyab xeeb ntxiv thiab txo cov teeb meem cuam tshuam txog suab nrov.
8. Pre-simulation thiab layout tsom xam:
Siv cov cuab yeej simulation thiab ua qhov kev ntsuam xyuas ua ntej tuaj yeem pab txheeb xyuas qhov muaj peev xwm ruaj khov thiab teeb meem suab nrov ua ntej ua tiav cov qauv PCB. Cov cuab yeej no ntsuas lub hwj chim kev ncaj ncees, teeb liab kev ncaj ncees, thiab hluav taws xob sib raug zoo (EMC) teeb meem. Los ntawm kev siv simulation-tsav cov tswv yim tsim, ib tus tuaj yeem daws cov teeb meem no thiab ua kom zoo tshaj PCB layout los txhim kho kev ua tau zoo.
Hauv kev xaus:
Kev ua kom lub zog ruaj khov thiab txo qis lub suab nrov yog qhov tseem ceeb rau kev tsim kho PCB kom ua tiav, tshwj xeeb tshaj yog nyob rau hauv cov teeb liab rhiab heev thiab kev siv hluav taws xob siab. Los ntawm kev siv cov txheej txheem hauv av tsim nyog, siv cov khoom siv decoupling capacitors, tsim cov khoom siv hluav taws xob qis impedance, siv cov lim dej thiab tiv thaiv kev ntsuas, thiab ua kom muaj kev simulation thiab kev soj ntsuam zoo, cov teeb meem no tuaj yeem daws tau zoo thiab muaj kev ruaj khov thiab txhim khu kev qha fais fab tuag. Nco ntsoov tias qhov kev ua tau zoo thiab kev ua haujlwm ntev ntawm PCB tsim tau zoo nyob ntawm kev saib xyuas rau cov khoom siv hluav taws xob ruaj khov thiab txo suab nrov.
Post lub sij hawm: Oct-03-2023
Rov qab
