Yuav Loj npaum li cas yuav tsum Pcb Traces

1. PCB kab

Feem ntau, ob qhov teeb meem yuav tsum tau txiav txim siab nyob rau hauv dav ntawm PCB thaiv. Ib qho yog qhov loj ntawm qhov tam sim no. Yog tias qhov tam sim no ntws los ntawm qhov loj, cov xaim tsis tuaj yeem nyias dhau; lwm qhov yog xav txog qhov tseeb board ua lub peev xwm ntawm board Hoobkas. Yog tias qhov tam sim no me me, cov xov hluav taws xob tuaj yeem ua rau nyias nyias, tab sis yog tias nyias nyias, qee qhov PCB board factories yuav tsis tuaj yeem ua rau lawv, lossis lawv yuav ua rau lawv tab sis qhov tsis xws luag tau nce, yog li qhov teeb meem ntawm PCB board manufacturers. yuav tsum xav txog.

PCB tooj liab thickness feem ntau muab faib ua 1OZ (35um), 2OZ (70um), 3OZ (105um), lub rooj tsavxwm ob sab yog 1oz; Cov txheej txheej sab hauv ntawm cov txheej txheem ntau txheej yog feem ntau 1/2oz 1/3oz, txheej txheej yog 1oz 1/2oz 1/3oz,

Muaj ob qhov ntau thiab tsawg hauv PCB, mm thiab mil, thiab kev sib raug zoo ntawm kev hloov pauv yog 1 hli =39mil.

Piv txwv li, qhov tso cai tam sim no ntawm cov kab IC uas siv dav nrog qhov dav ntawm 10mil thiab 1OZ yog li 675mA, thiab qhov tso cai tam sim no ntawm 8mil thiab 1OZ yog li 550mA. Koj tuaj yeem xa mus rau daim duab hauv qab no

The width of the power line and the ground line should be as wide as possible, and the ground line is wider than the power line. These relationships are: ground wire>power wire>teeb liab xaim, feem ntau qhov dav ntawm lub teeb liab xaim yog {{{0}}}2-0.3mm (8-12mil), qhov dav tshaj plaws yog 0.{{5 }}.07mm (2-2.8mil), thiab lub zog xaim yog 1.2- 2.5mm (48-100mil). (0.025mm=1mil).

2. Cov kab dav dav ntawm pcb thaiv

(1) Feem ntau, txoj kab dav thiab kab sib nrug yog tswj tau rau 8/8 mil, thiab lub qhov ntawm lub qhov yog xaiv los ntawm 12 mil (0.3 mm), uas tuaj yeem tsim los ntawm PCB cov tuam txhab feem ntau, thiab tus nqi tsim khoom tsawg.

(2) Feem ntau, txoj kab dav thiab kab sib nrug yog tswj tau mus rau 6/6mil, thiab qhov ntawm lub qhov yog xaiv los ntawm 12mil (0.3mm), uas tuaj yeem tsim los ntawm PCB cov tuam txhab feem ntau, thiab cov nqi tsim khoom. qis.

(3) Qhov tsawg kawg nkaus kab dav thiab kab sib nrug yog tswj rau 4/4mil, thiab lub qhov ntawm qhov yog 8mil (0.2mm). Ntau tshaj li ib nrab ntawm cov tuam txhab PCB tuaj yeem tsim tau, tab sis tus nqi yuav kim dua me ntsis dua li yav dhau los.

(4) Qhov tsawg kawg nkaus kab dav thiab kab sib nrug yog tswj tau rau 3.5 / 3.5mil, thiab ntawm lub qhov yog 8mil (0.2mm), uas tuaj yeem tsim cov PCB tsawg dua, thiab tus nqi yuav kim dua me ntsis .

(5) Qhov tsawg kawg nkaus kab dav thiab kab sib nrug yog tswj tau rau 2/2mil, thiab lub qhov ntawm lub qhov yog xaiv los ntawm 4mil (0.1mm), uas ntau pcb manufacturers tsis tuaj yeem tsim. Tus nqi ntawm qhov no yog qhov siab tshaj plaws, tab sis peb lub tuam txhab tuaj yeem ua tau.

(6) Mains nyob hlau thiab nruab nrab hlau: 80-100mil, 12V / 24V 20mil ~ 60mil, ntxiv rau 5V 20-30mil

, ntxiv rau 3V 20-30mil, qhov dav ntawm GND, qhov zoo dua 20-30mil, cov kab teeb liab zoo tib yam 10mil-20mil yog txiav txim siab los ntawm qhov ntom ntawm cov khoom

Yog hais tias txoj kab dav yog teem raws li qhov ceev ntawm PCB tsim, qhov ceev me me, txoj kab dav thiab kab sib nrug tuaj yeem teeb tsa loj dua, thiab qhov ceev yog qhov loj dua, thiab kab dav thiab kab sib nrug tuaj yeem tsim me me:

3. Cov ntsiab lus:

Cov teeb liab kab dav dav thiab vias yog raws li hauv qab no:

1) 8/8mil, 12mil (0.3mm) ntawm qhov.

2) 6/6mil, 12mil ({4}}.3mm) ntawm qhov.

3) 4/4mil, xaiv 8mil (0.2mm) rau ntawm lub qhov.

4) 3.5/3.5mil, xaiv 8mil (0.2mm) rau ntawm lub qhov.

5) 3.5 / 3.5mil, ntawm lub qhov yog 4mil (0.1mm, laser drilling).

6) 2/2mil, 4mil ntawm lub qhov (0.1mm, laser drilling).

Siv los ntawm: puab txoj kab uas hla 12mil, txheej kab 20mil

Siv sab hauv txoj kab uas hla 20mil, sab nraud txoj kab uas hla 30mil

4. Tam sim no sib raug rau txoj kab dav

I=K* T^0.44*A^0.47

K yog qhov kho coefficient. Feem ntau, cov hlau-clad tooj liab raug coj los ua 0.024 thaum nws nyob hauv txheej sab hauv thiab 0.048 thaum nws nyob hauv txheej txheej;

T yog qhov siab tshaj plaws kub nce, nyob rau hauv degree;

A yog qhov chaw hla ntu ntawm tooj liab clad hlau, chav tsev yog mil (tsis mm, them sai sai);

Kuv yog qhov siab tshaj plaws tso cai tam sim no, chav tsev yog A.

Tsab ntawv xov xwm no yog ib tsab xov xwm qub los ntawm CSDN blogger "Hais Lus Plaub Hau", uas ua raws li CC 4.0 BY-SA daim ntawv cog lus kev cai lij choj. Thov xa qhov txuas thawj qhov txuas thiab nqe lus no rau kev luam tawm dua.

Thawj qhov txuas: https://blog.csdn.net/qq_52940987/article/details/124570167