Kws qhia cov lus qhia: Xaiv lub zoo meej SMD fuse 3216 rau koj rau koj tus qauv PCBA
Tus txo hwj chim yog ib txoj kab tseem ceeb ntawm kev tiv thaiv hauv txhua qhov hluav taws xob. Xaiv qhov tsis ncaj ncees lawm tuaj yeem ua rau muaj kev kub ntxhov, tsis muaj kev tiv thaiv, lossis txawm tias muaj kev nyab xeeb. Lub 3216 (3.2mm X 1.6mm) pob yog ib qho ntawm cov khoom siv SMD feem ntau thiab cov kev sib tw zoo ntawm kev tuav tam sim no thiab kev coj ua.
Cov lus qhia no yuav taug kev koj dhau ntawm cov tseem ceeb thiab kev xav ua kom ua kev xaiv zoo.
Kauj ruam 1: Nkag siab cov ntsiab lus tseem ceeb
Ua ntej saib cov ntaub ntawv datasheets, koj yuav tsum koj yuav tsum txhais koj lub Circuit Court lub cev thiab kev ua txhaum.
1. Kev ua haujlwm ua haujlwm voltage (`v_rated`):Lub fuse cov kev ntsuas hluav taws xobyuav tsum muaj ntau dua los yog sib npaugKoj lub Circuit Court qhov kev ua haujlwm tshaj plaws (piv txwv li, 12v, 24V, 48v). Rau AC cov tshuab, siv RMS voltage. Qhov kev ntsuas siab ntau dua yog qhov muaj kev nyab xeeb los ntawm kev tiv thaiv standpoint.
Engineering tswv yim: siv 32V fuse rau ntawm 5V rail yog qhov zoo. Siv 5v fuse rau ntawm 24V Rail yog qhov txaus ntshai, raws li nws yuav tsis muaj kev nyab xeeb cuam tshuam rau kev sib cais dhau arc.
2. Kev ua haujlwm ib txwm tam sim no (`i_op`):Qhov no yog qhov khov kho -} Lub Xeev tam sim no koj Circuit Court Draws hauv kev thauj khoom hauv qab.Tsis txhob xaiv lub fuse nyob rau ntawm tus nqi no.
3. Ambient kub (`t_a`):Fuses yog rhiab rau qhov kub. Lawv tam sim no {- nqa muaj peev xwm (ampacity) feem ntau yog derated ntawm ntug dej kub. Paub qhov phem tshaj -} qhov teeb meem ambient kub nyob ib ncig ntawm fuse ntawm koj lub rooj tsavxwm.
Kauj ruam 2: Txhais cov hluav taws xob tseem ceeb
Nov yog qhov uas koj txhais koj cov hluav taws xob xav tau hauv cov kev qhia tshwj xeeb.
| Parameter|Dab tsi nws yog|Yuav xaiv li cas |
| Rated tam sim no (`i_rated`)| Lub nominal tam sim no lub fuse yog tsim los nqa.|Siv tus75% txoj cai ntawm tus ntiv tes xoo: `I_rated 'ntau dua lossis sib npaug rau` i_op` / 0.75.
Piv txwv li: Yog tias koj qhov Max khov kho -} Lub Xeev tam sim no yog 1a, xaiv cov fuse rau tsawg kawg1.33ACov. Voj voogCov. Puag ncig tus qauv zoo li1.5ACov. Qhov no muab lub taub hau rau inrush rurents thiab tiv thaiv kev qaug zog thermal. |
| Cuam tshuam kev ntaus nqi (`i_int`)| Qhov kev txhaum ntau tshaj plaws tam sim no lub fuse yuav muaj kev cuam tshuam nyab xeeb yam tsis muaj arcing, rupturing, lossis catching hluav taws. |Qhov no yog qhov kev nyab xeeb ntawm kev nyab xeeb.Nws yuav tsum yog siab dua qhov siab tshaj plaws muaj luv luv - Circuit Cour tam sim no los ntawm koj lub zog hluav taws xob (piv txwv li koj cov khoom siv hluav taws xob). Rau feem ntau tsawg - voltage dc cov laug cam, 50A lossis 100a txaus. Rau cov ntawv thov txuas ncaj qha rau high- tsheb npav tam sim no lossis AC tseem ceeb, koj yuav xav tau kev ntsuas ntawm 150A lossis ntau dua. |
| Voltage Rating (`V_RATED`) | As defined in Step 1. | Must be >= Koj Circuit Court's Max voltage. Ntau yam 3216 kev ntsuas yog 32VDC, 63VDC, thiab 72VDC. |
|
Kauj ruam 3: Xaiv lub sijhawm zoo - tus yam ntxwv tam sim no (TCC)
Qhov no yog tej zaum qhov kev xaiv tseem ceeb tshaj plaws, vim nws txhais tau sai npaum li cas lub fuse yuav tshuab nyob rau hauv cov mob overload.
Cast - ua yeeb yam (nrawm {{1}- tshuab):
Siv rooj plaub:Kev tiv thaiv cov khoom siv rhiab heev xws li LEDs, Mosfets, ICS, lossis kev ncig ncig nrog tsis muaj qhov tseem ceeb hauv Inrush tam sim no.
Cov yam ntxwv:Qhib sai sai ntawm kev loj dhau. Tuaj yeem sib xyaw tau yooj yim los ntawm spikes / inrush.
Datasheet Lookup:Txheeb xyuas qhov "melting tseem ceeb" (`i²t`). Ib qho tsawg heev `i²t` qhia tau nrawm - ua yeeb yam fuse.
Qeeb -} tshuab (lub sijhawm - qeeb):
Siv rooj plaub:Circuits nrog cov high inrush cov cawv, xws li cov uas muaj capactrativits loj, cov motors, lossis hloov pauv.
Cov yam ntxwv:Nrog rau kev nthwv dej ib ntus (piv txwv li, 5-10x `i_rated` rau tens / pua pua ntawm milliseconds) tsis muaj kev qhib, tab sis tseem tiv thaiv kev tawm tsam ntau dua kev txhawb nqa ntau dua.
Datasheet Lookup:Cov nkhaus TCC yuav qhia lub sijhawm meej ntawm cov kev sib npaug qis ntawm cov ntaus nqi tam sim no.
Yuav ua li cas rau txheeb xyuas:Lub ntsiab lus koj xavInrush tam sim no(Sijhawm vs. tam sim no) tawm tsam lub fuse tcc nkhaus ntawm lub datasheet. Xyuas kom meej tus inrush mem tes no nco ntsoov nyob rau hauv txoj kev nkhaus, thaum ib tug txhawb nqa kev txhaum nyob saum toj no.
Kauj Ruam 4: 3216-Cov Kev Txiav Txim Siab Tshwj Xeeb & PCBA teeb
1. Tam sim no tuav Vs. loj:Lub 3216 pob yog nrov rau cov dej ntws los ntawm ~ 500mA txog 5A lossis 6a. Ceev faj txog fuses thov siab heev siab (piv txwv li, 8a +) nyob rau hauv no hauv qhov me me pob {} nkag siab txog kev ua kom muaj kev cuam tshuam.
2. Mem tes wrector wrstt lub peev xwm:Qee cov fuses tsim los tswj cov kev rov ua dua (zoo li hauv kub -} pap lossis lub cev muaj zog siv daim ntawv thov). Tshawb xyuas tus neeg muag khoom cov ntaub ntawv ntawm Pulse Cycling yog tias qhov no siv rau koj.
3. PCBA teeb tsa cov kev coj ua zoo tshaj plaws:
Lw Dav:Xyuas kom cov pcb pcb uas ua rau thiab los ntawm fuse yog qhov dav txaus los lis cov rated tam sim no ntawm lub fuse tsis muaj cua sov ntau dhau. Lub fuse yuav tsum yog qhov tsis muaj zog tshaj plaws hauv txoj kev.
MeejClearance & Creepage:Tswj kev sib raug zoo ntawm cov fuse
Kev tso kawm:Tso lub fuse kom ze li sai tau rau lub zog nkag taw tes (piv txwv li, txuas, tswj cov tswv yim (tswj hwm tag nrho cov dej ntws.
Sau npe: Silkscreen cov fuse fuse tus tsim qauv (piv txwv li, `f1`), ntaus nqi (piv txwv li ntawm") tus lej ntawm lub rooj tsavxwm. Qhov no yog qhov ua tau zoo rau kev debugging thiab ua haujlwm.
Kauj Ruam 5: Cov Ntawv Teev Tseg Xaiv & Kev Txiav Txim Siab
Siv cov Flowchart no kom tau koj txoj kev txiav txim siab:
tus tswv qhia
FlowChart TD
Ib tug [Pib: Txhais Tau Circuit Court
I_OP, V_SYS, Inrush] -->B {Circuit muaj
siab inrush?};
B -
- Yes -->C [Xaiv cov qeeb -}}} tshuab hom];
B -
- No -->D [Xaiv vas - Ua yeeb yam];
C & D -->E [suav cov min i_rated
I_RATED >=ATED >= i_op / 0.75];
E -->F [Xaiv tus qauv txheem nqi
e.g., 1A, 1.5A, 2A];
F -->G [Soj ntsuam voltage ntsuas
V_FUSE >= v_sys];
G -->H [pov thawj cuam tshuam kev ntsuas
I_int> muaj kev txhaum tam sim no];
H -->I {xyuas cov temient temp &
Mem tes xav tau};
I -
- Pass -->J [Tsim shortlist &
Sib piv cov datasheetssasheets];
I -
- Fail -->K [{- screasing i_rated
lossis pob loj];
J -->L [Xaiv zaum kawg];
Kev Sib Tw Zaum Kawg:
Thaum
Thaum koj muaj 2-3 qhov chaw muaj peev xwm sib piv cov ntsiab lus kawg no:
Lub Koom Haum Pom Zoo Pom Zoo:Nws puas xav tau UL / CSA / CENF raug? CE khij?
Lub caijCov Khoom Siv Termination:Nickel / Palladium lossis tin - plated? Cuam tshuam holderability thiab kev ntseeg tau.
Nqi & Muaj:Tsis txhob ua kom tiav ib leeg -}}}}} sib chaws.
Cov ntsiab lus: Cov teeb meem ntau yam kom zam
Pitfall 1:Xaiv ib 1a fuse rau cov Circuit Court uas kos 0.95a.(Tshwm sim: kev lag luam tshuab.)
Pitfall 2:Siv cov nrawm nrawm - tshuab fuse rau ntawm lub peev xwm ntawm lub peev xwm- Rub lub zog hluav taws xob.(Tshwm sim: blows rau txhua lub zog - Up.)
Dosfall 3:Tsis quav ntsej cov kev cuam tshuam nrog kev cuam tshuam rau qhov siab - fais fab system.(Tshwm sim: kev puas tsuaj: tsis ua haujlwm thaum lub sijhawm luv luv.)
Dosfall 4:Tsis suav rau qhov chaw kub (piv txwv li, sab hauv lub thawv ntim khoom).(Tshwm sim: Laus laus thiab tsis tau xav txog kev mus ncig ua si.)
Los ntawm kev ua raws li txoj kev ua haujlwm no, koj tuaj yeem txav dhau ntawm kev xam tawm thiab muaj kev ntseeg siab, txhim khu kev qha rau koj tus qauv PCBA. Yuav tsum sab laj cov chaw tsim khoom lag luam tshwj xeeb cov datasheet- nws yog koj ib qho khoom tseem ceeb tshaj plaws ..