1. Hloov tam sim ntawd
Kev hloov tam sim no hais txog kev hloov ntawm IC yav dhau los nti nrog lwm tus IC yam tsis muaj kev hloov pauv, thiab kev hloov ntawm IC nti tsis ua rau cov yam ntxwv thiab qhov ntsuas qhov tseem ceeb ntawm cov cuab yeej siv tshuab.
Cov txheej txheem hloov pauv yog: hloov cov haujlwm ntawm IC, kev ua haujlwm tsis zoo, hom pob, daim ntawv thov tus pin, tus lej pin thiab ntev, thiab lwm qib yog tib yam. Ntawm no, lub luag haujlwm ntawm IC tsis yog tib yam nkaus xwb, tab sis kuj tseem them nyiaj rau tib lub logic zoo thiab qhov tsis zoo, uas yog, tso tawm lub suab tawm tswv yim zoo thiab tsis zoo, ua haujlwm voltage, lub zog tam sim no ntau li ntau tau. Kev ua tau zoo tsis xa mus rau lub ntsiab hluav taws xob tsis zoo ntawm IC (lossis cov ntaub ntawv tseem ceeb ntawm cov duab kos). Qhov siab tshaj plaws poob ntawm cov zis hluav taws xob. Qhov siab tshaj plaws ua haujlwm voltage. Tus qauv zaus thiab cov tswv yim ntawm txhua cov ntaub ntawv teeb liab ntawm IC. Lub ntsiab tsis xws li tso zis impedance yuav tsum zoo ib yam li thawj IC. Hloov cov ICs nrog cov zis me me yuav tsum txhim kho cov cua sov los ntawm cov kav dej kub.
1. Hloov ntawm tib lub qauv specification IC
Kev hloov ntawm tib yam specification thiab qauv IC feem ntau ntseeg tau. Thaum txhim kho lub PCB sib xyaw ua ke, ua tib zoo saib xyuas txoj haujlwm kom tsis txhob ua yuam kev, txwv tsis pub, kev sib txuas ntawm PCB Circuit Court yuav raug puas tsuaj thaum ntsaws rau hauv. Qee qhov ncaj qha plug-in fais fab amplifier ICs muaj tib yam specifications, qauv, kev ua haujlwm, thiab cov yam ntxwv, tab sis txoj haujlwm ntawm cov pins tsis zoo ib yam. Piv txwv li, ob-channel fais fab amplifier ICLA4507, cov pins muab faib ua" zoo" thiab" tsis zoo" thiab qhov pib thiab qhov kawg pins raug cim (xim dots lossis dents) nyob rau hauv cov lus qhia sib txawv: tsis muaj cov ntaub ntawv lub npe thiab cov ntaub ntawv lub npe" R" IC, thiab lwm yam, xws li M5115P thiab M5115RP.
2. Cov lus qhia tshwj xeeb thiab cov qauv yog tib yam li cov ntawv sau ua lus Askiv thiab Askiv. Cov ntaub ntawv cov ntaub ntawv tsis zoo ib yam li kev hloov ntawm IC
Hom kev hloov IC no tsuas yog yuav tsum muaj tib tus pin ua haujlwm ntawm ib leeg, thiab nws cov PCB hauv Circuit Court thiab hluav taws xob tseem ceeb tsis sib txawv me ntsis, thiab lawv tuaj yeem hloov tau tam sim ntawd. Piv txwv li, ICLA1363 thiab LA1365 tau muab tso rau hauv lub suab. Lub tom kawg muaj Zener diode hauv IC tus pin 5 piv rau yav dhau los, thiab lwm tus yog tib yam.
Raws li ib txwm muaj, tsab ntawv Askiv raws li cov lus ua ntej sawv cev rau cov chaw tsim khoom thiab hom PCB Circuit Court. Cov ntaub ntawv cov ntsiab lus tom qab tsab ntawv Askiv raws li cov lus ua ntej yog tib yam, thiab feem ntau ntawm lawv tuaj yeem hloov tau tam sim ntawd. Tab sis kuj muaj tsawg heev, txawm hais tias cov ntaub ntawv cov ntaub ntawv yog tib yam, tab sis cov nyhuv txawv. Piv txwv li, HA1364 yog lub suab IC, thiab uPC1364 yog xim codec IC; cov ntaub ntawv cov ntaub ntawv yog 4558, 8-pin yog lub loj Circuit Court NJM4558, thiab 14-pin yog CD4558 cov ntaub ntawv PCB Circuit Court; yog li ob qho tib si tsis tuaj yeem hloov tau txhua. Yog li ntawd, peb kuj yuav tsum saib tus pin function.
Qee cov tuam txhab qhia txog cov khoom siv tsis tau ntim IC, thiab tom qab ntawd tsim thiab ua cov khoom lag luam muaj npe tom qab lub Hoobkas, uas tseem yog cov khoom lag luam txhim kho kom zoo dua qee qhov kev ntsuas qhov tseem ceeb. Cov khoom sib txawv thiab cov qauv ntawm cov khoom no tau muab cov npe lossis cov ntsiab lus ntawm cov qauv thiab cov qauv sib txawv hauv ntau qhov chaw. Piv txwv li, AN380 thiab uPC1380 tuaj yeem hloov tau tam sim ntawd, thiab AN5620.TEA5620.DG5620 tuaj yeem hloov tau tam sim ntawd.
2. Tsis hloov tam sim ntawd
Kev hloov ntawm IC tam sim no txhais tau hais tias nws tsis tuaj yeem hloov IC tam sim ntawd, hloov me ntsis ntawm sab nraud PCB Circuit Court, hloov qhov kev txiav txim ntawm tus thawj pins lossis kho cov khoom siv hluav taws xob ywj pheej, thiab lwm yam. IC.
Hloov cov qauv: Hloov IC (siv) tuaj yeem sib txawv ntawm tus thawj IC tus pin. Cov khoom tsim yog txawv, tab sis qhov ua haujlwm yuav tsum zoo ib yam, thiab cov yam ntxwv yuav tsum zoo sib xws; Tom qab hloov IC, cov yam ntxwv ntawm lub tshuab qub tsis tuaj yeem raug puas tsuaj.
1. Hloov cov ntim sib txawv ntawm ICs
Tib hom IC integrates IC, tab sis cov khoom ntim khoom tsim txawv. Thaum hloov IC, tsuas yog cov pins ntawm cov khoom siv hluav taws xob tshiab yuav tsum tau hloov kho raws li tus qauv tsim thiab cov kab ke ntawm cov khoom siv hluav taws xob qub. Piv txwv li, AFTPCB Circuit Court CA3064 thiab CA3064E, lub qub yog ib lub nplhaib pob nrog radial pins; lub tom kawg yog ib tug spherical roller bearing nyob rau hauv-kab yas pob. Cov yam ntxwv sab hauv ntawm ob yog tib yam, thiab lawv tuaj yeem txuas tau raws li kev ua haujlwm ntawm tus pins. Spherical roller bearings ICAN7114.AN7115 thiab LA4100.LA4102 pob hom yog qhov pib zoo ib yam, cov hlau lead thiab cov yeeb nkab kub kub dissipation yog raws nraim 180 degrees sib nrug. Lub AN5620 nrog lub tshav kub yeeb nkab kom dissipate tus kheej kheej cov menyuam bearing nyob rau hauv-kab 16-pin pob. TEA5620 kheej kheej cov menyuam kabmob hauv kab 18-pin pob. Lub 9.10-pin yog nyob rau sab xis ntawm kev sib xyaw PCB Circuit Court, uas yog sib npaug rau cov yeeb nkab kub ntawm AN5620 rau cov cua sov dissipation. Cov kab ke ntawm lwm tus pins yog tib yam, thiab kev tiv thaiv hauv av tuaj yeem siv los ntawm kev sib txuas tus pin 9.10.
2. PCB Circuit Court ua haujlwm zoo ib yam, tab sis qee tus pins muaj cov haujlwm sib txawv.
Thaum hloov IC, nws tuaj yeem ua tau raws li cov lus qhia tseem ceeb thiab cov lus qhia ntawm txhua tus qauv IC. Piv txwv li, AGC.rtmp raws tu qauv tso tawm hauv TV muaj qhov sib txawv ntawm qhov zoo thiab qhov tsis zoo polarity. Koj tsuas yog yuav tsum tau ntxiv ib qho inverter rau I / O kawg los hloov IC.
3. Hloov cov ICs nrog tib lub yas tab sis txawv tus pin ua haujlwm
Qhov kev hloov pauv no yuav tsum tau hloov pauv sab nraud PCB Circuit Court thiab tus pin sib lawv liag, yog li nws yuav tsum muaj qee yam kev paub, cov ntaub ntawv ntxaws ntxaws thiab kev paub txog kev sib raug zoo thiab cov txheej txheem.
4. Muaj ob txhais taw khoob uas tsis tuaj yeem ua hauv av ntiag tug
Qhov sib npaug hauv PCB Circuit Court thiab cov hlau lead-out pins uas muaj nyob rau hauv cov khoom siv PCB tsis raug cim. Thaum ntsib tus pin khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob Xws li cov hlau lead-out pins yog disassembly lossis spare pins, thiab qee zaum siv rau kev sib txuas sab hauv.
5. Kev sib xyaw ua ke los hloov IC
Kev sib xyaw ua ke hloov IC yog los npaj qhov tsis muaj kev puas tsuaj rau PCB Circuit Court ntawm ntau yam ICs ntawm tib lub ntsiab lus thiab qauv rau hauv cov ncauj lus kom ntxaws IC los hloov IC txoj kev tsis muaj zog. Nws yog qhov tsim nyog rau cov xwm txheej uas ICs hauv chav loj tsis tuaj yeem yuav. Txawm li cas los xij, nws tau teev tseg tias qhov tsis zoo ntawm PCB Circuit Court hauv IC siv yuav tsum muaj lub qhov (socket leads).
Tus yuam sij rau kev hloov tsis tau tam sim no yog kom meej meej xyuas feem ntau ntawm cov hluav taws xob tseem ceeb ntawm ob hom ICs uas tau hloov nrog ib leeg. Internal sib npaug Circuit Court Circuit Court PCB Circuit Court. Lub luag haujlwm ntawm txhua tus pin. Cov khoom siv hluav taws xob ntawm IC ntu txuas rau ib leeg. Associated raw khoom. Ua tib zoo saib cov kauj ruam.
(1) Qhov kev txiav txim ntawm tus lej xov tooj ntawm tus pins ntawm kev sib xyaw PCB yuav tsum tsis txhob muab tso rau hauv qab;
(2) Txhawm rau kom sib xyaw cov yam ntxwv ntawm kev hloov IC nti, nws tsis yog ntau npaum li cov pins ntawm sab nraud PCB Circuit Court uas txuas nrog yuav tsum tau hloov pauv;
(3) Lub zog hluav taws xob hluav taws xob yuav tsum ua raws li kev hloov IC. Yog hais tias lub hwj chim mov voltage nyob rau hauv thawj PCB Circuit Court yog siab, yuav tsum tau ua txhua yam kom txo tau cov ntshav lipids; kev ua haujlwm yuav tsum muaj qhov ua haujlwm qis, nyob ntawm seb qhov hloov IC puas tuaj yeem ua haujlwm;
(4) Tom qab kev hloov pauv, kev ua haujlwm tam sim no ntawm IC cov ntaub ntawv yuav tsum raug ntsuas kom raug. Yog tias qhov tam sim no nyob deb dhau qhov ntsuas ntsuas, nws qhia tau tias PCB Circuit Court yuav ua rau muaj kev sib txuas ntawm cov hluav taws xob, thiab kev sib txuas thiab kev hloov kho yuav tsum tau ua nyob rau lub sijhawm no. Yog tias tus nqi nce txawv ntawm qhov ua ntej, cov lus tawm tswv yim tuaj yeem hloov kho;
(5) Cov tswv yim tom qab hloov IC. Cov zis impedance yuav tsum ua raws li tus thawj PCB Circuit Court; tshawb xyuas nws cov kev txawj ntse tshaj lij;
(6) Thaum hloov kho, cov ko taw qhov thiab cov kab hluav taws xob ntawm cov thawj PCB Circuit Board yuav tsum tau siv yooj yim. Cov kab hluav taws xob sab nraud yuav tsum tau ua kom zoo zoo txhawm rau txhawm rau tiv thaiv pem hauv ntej, nraub qaum, sab laug thiab sab xis, uas yog qhov zoo rau kev saib xyuas. Tsis txhob PCB circuit series resonance circuits, tshwj xeeb tshaj yog tsis txhob muaj high-frequency series resonance circuits;
(7) Ua ntej ntsaws rau hauv, nws yog qhov zoo tshaj plaws los txuas lub DC tam sim no meter rau ib leeg hauv Vcc lub voj voog ntawm kev hloov hluav taws xob hloov hluav taws xob kom txo tau tus nqi ntawm cov lipid resistor los ntawm loj mus rau me me. Saib seb qhov kev hloov pauv ntawm tag nrho cov tam sim no ntawm kev sib xyaw PCB Circuit Court yog qhov qub.
6. Hloov IC nrog cov khoom sib cais
Qee lub sij hawm nws muaj peev xwm los hloov qhov rhuav tshem ntawm IC nrog cov khoom sib cais kom rov qab ua nws txoj haujlwm qub. Ua ntej hloov IC, nws yog ib qho tsim nyog yuav tsum tuav lub hauv paus ntsiab lus ntawm kev ua haujlwm sab hauv ntawm IC, qhov ua haujlwm ib txwm ua haujlwm ntawm txhua tus pin, waveform thiab lub tswv yim ntawm PCB Circuit Court nrog cov khoom siv hluav taws xob sab nraud. Ntxiv thiab, xav txog:
(1) Cov ntaub ntawv teeb liab puas tuaj yeem raug tshem tawm los ntawm kev ua haujlwm C thiab coj mus rau qhov chaw tawm tswv yim ntawm sab nraud PCB Circuit Court:
(2) Cov ntaub ntawv teeb liab daws teeb meem los ntawm lwm lub PCB Circuit Court txuas mus rau qib tom ntej hauv kev sib xyaw PCB Circuit Court rau kev daws teeb meem (cov ntaub ntawv teeb liab sib piv thaum sib txuas tsis cuam tshuam nrog nws cov yam ntxwv thiab cov yam ntxwv). Yog hais tias lub IC puas lawm, los ntawm qhov kev xav ntawm kev nplua nuj siv ntawm PCB Circuit Court thiab lub hauv paus PCB Circuit Court, nws yog tsim los ntawm lub suab zaus discriminator thiab nws cov zaus li. Cov ntaub ntawv teeb liab input txoj kev yuav siv tau los nrhiav qhov puas. Yog tias nws yog lub suab nrov tshaj plaws Yog tias nws raug rhuav tshem, koj tuaj yeem hloov IC nrog cov khoom sib cais.
