Thermal tsim ntawm fais fab mov
Qhov teeb meem thermal ntawm lub hwj chim module yuav ua mob hnyav rau kev ntseeg siab ntawm lub module, thiab qhov tsis ua hauj lwm ntawm cov khoom yuav nce exponentially. Kuv yuav ua li cas yog tias lub hwj chim module heats? Los ntawm qhov kev xav ntawm module thermal tsim, tsab xov xwm no qhia koj txog ntau yam kev ntsuas kub qis, kev ntseeg siab ntawm lub zog hluav taws xob tsim thiab kev daws teeb meem.
Qhov kub thiab txias muaj qhov cuam tshuam zoo rau kev ntseeg tau ntawm lub zog modules nrog lub zog siab ceev. Kev kub siab yuav ua rau lub neej ntawm electrolytic capacitors txo qis, cov yam ntxwv ntawm cov hluav taws xob hloov hluav taws xob enameled hlau, transistor puas, cov khoom thermal aging, qis melting point weld cracking, solder pob qij txha poob, thiab txhua yam kev nyuaj siab ntawm cov cuab yeej nce. Kev txheeb xyuas qhia tau tias txhua txhua 2 ° C nce hauv qhov kub ntawm cov khoom siv hluav taws xob, qhov kev ntseeg tau txo qis los ntawm 10%.
Yuav tsim cov kev daws teeb meem thermal li cas?
Txo qhov kev poob ntawm cov qauv thiab cov khoom siv: xws li kev siv cov kev tswj xyuas zoo dua thiab cov thev naus laus zis, kev siv tshuab hluav taws xob hloov hluav taws xob siab, theem hloov pauv kev tswj tshuab, synchronous rectification technology, thiab lwm yam, ntxiv rau kev xaiv cov khoom siv hluav taws xob tsawg kom txo tau qhov tus naj npawb ntawm cov khoom siv cua sov, Ua kom qhov dav ntawm cov ntawv tuab tuab los txhim kho qhov ua tau zoo ntawm cov khoom siv hluav taws xob;
Lub ntim ntawm cov khoom muaj feem cuam tshuam rau qhov kub thiab txias ntawm cov khoom. Piv txwv li, vim qhov sib txawv ntawm kev siv tshuab, DFN ntim MOS raj yog yooj yim dua rau dissipate tshav kub tshaj DPAK (TO252) ntim MOS raj. Nyob rau hauv tib qhov kev poob qis, qhov kub thiab txias ntawm qhov qub yuav me me. Feem ntau, qhov loj dua qhov tsis kam ntawm lub pob, qhov siab dua qhov ntsuas lub zog, thiab nyob rau hauv tib qhov kev poob qis, qhov kub ntawm qhov saum npoo yuav me dua.
Qee lub sij hawm, qhov ntsuas hluav taws xob thiab kev ua haujlwm zoo li qub, tab sis qhov tseeb muaj teeb meem loj zais. Raws li pom hauv daim duab 3, tsis muaj teeb meem nrog kev ua tau zoo ntawm qee qhov hluav taws xob, tab sis nyob rau hauv chav tsev kub, qhov kub thiab txias ntawm kev tsav tsheb ntawm MOS raj mus txog 95.2 ° C thaum ntsuas nrog cov duab hluav taws xob infrared. Nyob rau hauv lub sij hawm ntev ua hauj lwm los yog kub ib puag ncig, cov teeb meem ntawm kev tiv thaiv burnout thiab module puas tau yooj yim heev tshwm sim. Los ntawm kev kho cov kev ntsuas hluav taws xob, qhov hluav taws xob ohmic poob ntawm cov resistor raug txo, thiab cov pob resistor hloov ntawm 0603 mus rau 0805, uas txo qhov kub thiab txias.
PCB tsim optimized thermal tsim
Qhov chaw ntawm daim tawv nqaij ntawm lub PCB, lub thickness ntawm daim tawv nqaij tooj liab, cov khoom ntawm lub rooj tsavxwm, thiab tus naj npawb ntawm PCB txheej txhua yam cuam tshuam rau lub tshav kub dissipation ntawm lub module. Feem ntau siv lub rooj tsavxwm FR4 (epoxy resin) yog cov khoom siv thermal conductivity zoo, thiab cov khoom cua sov ntawm cov khoom ntawm PCB tuaj yeem cuam tshuam los ntawm PCB. Hauv daim ntawv thov tshwj xeeb, kuj tseem muaj cov phaj nrog qis thermal kuj xws li aluminium substrates lossis ceramic substrates.
Cov txheej txheem thiab routing ntawm PCB yuav tsum xav txog qhov kub dissipation ntawm lub module:
Cov khoom siv hluav taws xob loj loj yuav tsum tsis txhob muab cov txheej txheem sib dhos, thiab sim ua kom cov cua sov sib npaug ntawm lub rooj tsavxwm;
Thaum tshav kub kub rhiab Cheebtsam yuav tsum tau khaws cia kom deb ntawm qhov chaw tshav kub tshwj xeeb;
Siv ntau txheej PCB thaum tsim nyog;
Lub nraub qaum ntawm lub hwj chim yog coated nrog lub dav hlau tooj liab kom dissipate cua sov, thiab siv" kub qhov" hloov cov cua sov ntawm ib sab ntawm PCB mus rau lwm qhov.
Siv cov cuab yeej siv hluav taws xob kom zoo dua: siv cov khoom siv hluav taws xob, hluav taws xob, thiab cov tshuab hluav taws xob hloov hluav taws xob, suav nrog kev siv hluav taws xob, cua txias (natural convection thiab yuam cua txias), kua txias (dej, roj), thermoelectric txias, kav dej kub, lwm..
Hauv kev tsim thermal, koj yuav tsum tau them sai sai rau:
Rau cov khoom siv hluav taws xob nrog cov khoom siv dav-voltage, cov ntsiab lus cua sov thiab cov hluav taws xob faib hluav taws xob ntawm cov khoom siv hluav taws xob siab thiab cov khoom siv hluav taws xob tsawg yog qhov sib txawv kiag li, thiab yuav tsum muaj kev ntsuam xyuas dav. Cov cua kub taw tes thiab kev faib hluav taws xob thaum lub sij hawm tiv thaiv luv luv yuav tsum tau soj ntsuam;
Hauv potting fais fab modules, potting kua nplaum yog cov khoom siv thermal conductivity zoo. Qhov kub ntawm qhov saum npoo ntawm cov khoom sab hauv ntawm lub module yuav raug txo kom tsawg.
Ntxiv nrog rau cov lus hais saum toj no, cov txheej txheem tsim hluav taws xob thermal tsim, kev ua haujlwm siab cais DC-DC lub zog hluav taws xob kuj tuaj yeem raug xaiv ncaj qha, uas tuaj yeem muab cov khoom siv hluav taws xob tiv thaiv kev sib cais ceev ceev rau lub kaw lus. Raws li kev tsim khoom ntawm ze li ntawm 20 xyoo ntawm kev tsim hluav taws xob tsim, ZHIYUAN Electronics tau tsim nws tus kheej thiab tsim cov khoom siv hluav taws xob ywj pheej ICs los tsim P series ntawm optimized tas li voltage DC-DC cov khoom siv hluav taws xob rau txhua qhov kev ua haujlwm kom tau raws li qhov xav tau ntawm txhua qhov kev ua haujlwm. cov xwm txheej thiab muab cov neeg siv nrog kev ruaj khov thiab ua tau zoo ntawm cov khoom siv hluav taws xob daws teeb meem. Piv nrog rau cov kev daws teeb meem ib txwm muaj, ZHIYUAN Electronics 'autonomous fais fab mov IC integrates tiv thaiv kev ua haujlwm xws li kev tiv thaiv luv luv thiab tiv thaiv kub dhau. Nws muaj kev sib koom ua ke ntau dua thiab kev ntseeg siab, ua kom muaj kev ua haujlwm siab thiab ruaj khov nyob rau hauv txhua qhov kev ua haujlwm, thiab tuaj yeem muab cov neeg siv nrog I / O thiab kev sib txuas lus. Cov ntawv thov xws li kev sib cais muab cov qauv thiab txhim khu kev qha fais fab kev daws teeb meem.
