SMPS PCB Layout Guidelines yeMabhodhi Emagetsi Akavimbika

Chinja modhi magetsi ekupa PCB dhizaini inosarudza kana SMPS yako ichipa makore ebasa rakavimbika kana kutadza kudhura. Musiyano unowanzo kudzika kusvika kumamirimita mukuiswa kwechikamu kana kusarudza iyo chaiyo capacitor mhando. Gadzirisa yako switch modhi magetsi ekupa PCB neanoshanda marongero matekiniki, EMI kudzikisira, uye yekupisa manejimendi maitiro ekugara kwenguva refu, anoshanda SMPS. Heano nhungamiro inoshanda kubva mukugadzira zviuru zveSMPS madhizaini pane yega yega topology uye simba level.

SMPS Primary Side PCB Layout Dhizaini Mitemo

Rutivi rwekutanga rwe switch modhi magetsi ekupa PCB inobata zvine njodzi voltages uchichinja pakakwirira. Uku kusanganiswa kunoda kutarisisa kuchengetedzeka nzvimbo uye kuderedzwa kweparasitic.

Tanga neiyo main switching loop: yekutanga switch, transformer yepuraimari, uye yekuisa capacitor. Iyi loop inofanira kunge idiki sezvinobvira-pasi pe400mm² ye100W flyback converter. Yese yakawedzera square centimita inowedzera radiated EMI uye inoderedza kushanda zvakanaka. Isa iyo yekupinza capacitor yakananga pakati peiyo switch yekudhonza uye yepuraimari pasi, ine mitsetse iri pasi pe10mm kureba.

Network ye "primary switch snubber" inoda kutariswa zvakaenzana. Isa zvikamu zve "snubber" zvakananga pa "switch", kwete pa "transformer". Shandisa ma "resistor" e2kV-rated kune ma "snubbers" - ma "resistor" akajairwa arc pamusoro pe "high voltages". Kune ma "AC-DC Converter PCB applications" ari pamusoro pe75W, shandisa ma "active clamp circuits" panzvimbo pe "dissipative snubbers". Matekiniki aya anoshandawo kune ma "primary side designs " ePower Converter PCB .

Kupi Kuisa Transformer paSMPS PCB Board

Transformer chinzvimbo inokanganisa EMI, mashandiro emafuta, uye nzvimbo yekuchengetedza. Orient transformer ane mapini ekutanga akatarisana nezvikamu zvekupinza uye mapini echipiri kune zvinobuda. Uku kuparadzaniswa kwechisikigo kunobatsira kuchengetedza zvinodiwa creepage madaro.

Dzivisa izvi zvikanganiso zvetransformer:

• Kuisa kutonga ICs zvakananga pasi pevashanduri (magnetic coupling inokonzeresa kusagadzikana)
• Kufambisa masaini masaini pedyo netransformer pini (ruzha jekiseni)
• Kusakwana clearance yekutonhodza mhepo
• Kushaikwa nhovo pakati pepuraimari nesecondary windings

Kune magadzirirwo asina kunyanya kuoneka, funga nezvematransformer eplanar akabatanidzwa muPCB. Hunhu hwedu hwekugadzira PCB hunosanganisira mabhodhi ane zvidimbu makumi maviri ekugadzirisa mawindings eplanar transformer akaomarara. Aya matekiniki epamusoro anobatsirawo pakushandisa High Efficiency Power PCB.

Maitiro ekugadzira SMPS Output Rectifier Circuit Layout

Sekondari mativi marongero anokanganisa kushanda zvakanaka, ripple, uye muchinjika-muchinjika mune akawanda-zvinobuda zvekushandisa. Rectifier diodes kana synchronous MOSFETs inofanirwa kubatana yakananga kune ekuchinja sekondari ine hurefu hushoma hwekutevera. Kunyangwe 10mm yekuwedzera trace inowedzera yakakwana inductance kukonzera voltage spikes uye kurira.

Output capacitor placement inotevera mitemo yakafanana kune yekutanga side-imise iwo kuti ideredze ikozvino loop nzvimbo. Kune madhizaini ane zvakawanda zvinobuda, tsvaga yega yega ma capacitor padhuze neawo anogadziridza, asina kuunganidzwa pane yekubatanidza.

Kusefa kwemagetsi uchishandisa nzira yakajairika kunoderedza kuburitswa kwemhepo asi kunoda kushandiswa kwakakodzera. Ma-capacitor eY kubva pasi rechipiri kusvika pasi rekutanga anofanira kushandisa zvikamu zvakatarwa kuti zvisaparare. Isa ma-common-mode chokes apo tambo dzinobuda mubhodhi, kwete zvisina kurongeka pakati pemagadzirirwo. Maitiro aya ekusefa akafanana neaya anoshandiswa mumagadzirirwo ePCB ePower Supply Filter.

Kugadzirisa SMPS Oscillation uye Kusagadzikana Matambudziko

Kugadzikana kweSMPS kunoenderana neakachena mhinduro masiginecha emahara kubva pakuchinja ruzha. Mhinduro yenzira inoteedzera kure kubva kune ese ekuchinja node, transformer, uye nzira dzepamusoro-zvazvino. Shandisa ndege dzepasi kudzivirira, asi usagadzira zvishwe zvepasi.

Critical control circuit guidelines:

• Optocoupler placement inosarudza yekutanga-secondary creepage
• TL431 mareferensi anoda yakagadzikana voltage uye muripo wakakodzera
• Ikozvino masaini masaini anoda Kelvin kubatana uye kusefa
• Yakapfava-yekutanga capacitors chinzvimbo padyo necontroller ICs

Kune SMPS yekudzora yedhijitari uchishandisa DSP kana microcontrollers, shandisa mapuraneti epasi eanalog needhijitari akabatana panzvimbo imwe chete. Ruzha rwedhijitari munzira dzemhinduro dzeanalog runokonzera kuvhunduka uye kusagadzikana. Pfungwa dzakafanana dzinoshanda kune manetwork emhinduro ePCB ePower Regulation .

Maitiro ekugadzira EMI Sefa yeSwitch Mode Power Supply

Yese switch modhi magetsi ekupa PCB inoda EMI kusefa kuti isangane nezvinodiwa zvekutonga. Asi kuwedzera zvisina tsarukano mafirita kazhinji kunoita kuti zvinhu zvitonyanya kuipa. Nzwisisa kunobva ruzha uye nzira dzekuparadzira usati wagadzira mafirita.

Anoshanda EMI mafirita maitiro:

• Mafirita-matanho maviri anopa attenuation iri nani pane imwe-nhanho
• Common-mode chokes inoenda pamberi pekusiyanisa-modhi inductors
• X uye Y capacitor kuiswa kunokanganisa kushanda kwesefa
• Wedzera kunyorova kudzivirira kusefa resonance neSMPS yekupinza impedance

Kusarudzwa kwezvikamu kunokosha—ma capacitor eX2 emutsetse-ku-mutsetse, Y1 yemutsetse-ku-pasi mumashandisirwo emagetsi. Shandisa ma choke anobhadharwa nemagetsi ekusefa common-mode pasina kuguta kubva kuma differential currents. Aya ma EMI solutions anobatsirawo magadzirirwo ePower Electronics PCB ane matambudziko akafanana neruzha.

SMPS PCB Thermal Management Pasina Mafeni

Thermal management inotanga nePCB dhizaini, kwete heatsinks. Kuiswa kweSmart component kunogona kuderedza tembiricha ne20°C pasina kuwedzera hardware inotonhodza. Zvinhu zvinogadzira kupisa zvinoda nzvimbo yekuyerera kwemhepo uye zvinofanirwa kudzivirira kudziyisa nzvimbo dzinonzwa.

Thermal optimization maitiro:

• Shandisa 2oz kana mhangura inorema pakupisa kupisa
• Shandisa thermal vias pasi pezvinhu zvinopisa
• Position electrolytic capacitors kure nekupisa masosi
• Funga nezvemaconvection mapatani mukuiswa kwechikamu

Kune magadzirirwo asina feni, kuiswa kwePCB yakatwasuka kunovandudza convection yechisikigo. Wedzera zvidzitiro kana nzvimbo dzekushandisa kuti utonhorese chimney-effect. Aya maitiro ekutonhodza asingapindiki akakosha kuti PCB yePower Amplifier ivimbike zvakare.

SMPS PCB Yekuedza Mapoinzi uye Manongedzo eKugadzira

SMPS PCBs dzinofanirwa kugadzirwa kuti dzakavimbika kugadzira uye kuyedzwa. Dzivisa zvikamu zvakatsetseka-pitch muzvikamu zve-high-voltage pane zvakakosha nzvimbo. Ipa bvunzo mapoinzi eakakomba voltages uye waveforms.

Mafungiro ekugadzira:

• Chengetedza 0.5mm mashoma annular mhete dzepamusoro-ikozvino vias
• Shandisa misodzi pamatanho emagetsi kudzivirira kusimudza
• Wedzera fiducials yeautomated assembly alignment
• Rondedzera zvakakodzera solder mask kuwedzera kune simba zvikamu

Maitiro edu ekubatanidza maPCB anosanganisira kuyedzwa mukati medunhu uye kusimbiswa kwebasa pasi pemamiriro akasiyana-siyana emutsetse uye mutoro. Dhizaini yenzvimbo dzekuyedza dzinosvikika nekukurumidza—kugadziriswazve kwadzo kunokanganisa kugadziriswa kwemarongerwo.

Batana neHighleap Electronics kuti uwane ruzivo rwekugadzira magetsi mukugadzira SMPS. Tinonzwisisa zvinhu zvinosiyanisa magetsi akavimbika nekutadza kushanda zvakanaka kwemagetsi.