AC-DC Shanduko PCB Kugadzira - Kuchengetedza uye Kubudirira muMains-Powered Dhizaini

Yakavimbika AC-DC inoshandura PCB yekugadzira inoda zvinopfuura kuyera mirau yekuchengetedza, zvibodzwa zvinobudirira uye mutengo: zvinoda enjiniya yekuzviparadzanisa nevamwe geometry, inopindirana creepage / kucheneswa, yakagadziridzwa PFC / yekumberi-yekupedzisira dhizaini, yakaderedzwa yakakwira-frequency loop inductance, yakasimba yekupisa uye dhizaini yekuvhiya, uye inovharika / inovhenekwa FCT. Kugadzirwa kwakakura-kwese kwevatengi uye maindasitiri SMPS inosimbisa zvinhu izvi zvinogara zvichideredza kukwesha kwezvitupa uye kutadza kwemunda.

Maitiro ekugadzira AC-DC Shandura PCB yekuteerera Kuchengetedzwa

Mitemo yekuchengeteka inoita seyakaoma, asi nheyo dzakananga. Kune 240VAC masisitimu, chengetedza 3mm zvishoma creepage pakati pepuraimari nesekondari maseketi. Kaviri iyo ye480VAC indasitiri AC-DC Shandura PCB maapplication.

Mapfupi anotadza kupihwa chitupa:

• Kuvimba nesolder mask yekuzviparadzanisa nevamwe (haina kuverengerwa kuchengetedza)
• Kuisa zvikamu padyo zvakanyanya nemapendero ebhodhi
• Kuregeredza altitude derating yekumisikidzwa kwepamusoro-soro

Smart mhinduro dzinopfuura nguva dzese:

• Nzira dzinotsvedza pakati pezvikamu zvepuraimari uye zvechipiri
• Shandisa chengetedzo-yakatemerwa optocouplers ine yakakodzera CTI zviyero
• Isa conformal coating kudzikisa creepage zvinodiwa nedhigirii rimwe rekusvibisa

Pachirongwa chePCB chePower Supply Filter chekurapa chachangobva kuitwa , takawana mukana wekuisa 2×MOPP (Means of Patient Protection) munzvimbo shoma ne40% tichishandisa nzvimbo yekuisa zvinhu zvine chekuita nemagetsi uye zvinhu zvine CTI yakawanda.

Simba Factor Kururamisa PCB Dhizaini Yakanakisa Maitiro

Power Factor Correction haisi sarudzo pamusoro pe75W mumisika mizhinji. Asi PFC maseketi anoburitsa yakakosha EMI kana ikasaitwa zvakanaka. Iyo inosimudzira inductor kuiswa inoita kana kutyora yako EMI kuita. Gadzirisa kure kubva kune anonzwa kudzora maseketi, ine switching node yakatarisa kure nekumucheto kwebhodhi.

Yakakosha PFC dhizaini zvinhu:

• Yazvino pfungwa resistor inoda Kelvin yekubatanidza uye kusiyanisa nzira kune controller
• Boost diode inoda snubber yedunhu kudzora reverse kudzoreredza ruzha
• Output capacitor placement inokanganisa zvese ripple uye control loop kugadzikana

Maitiro edu ekugadzira PCB yePower Converter anosanganisira kuongororwa kweEMI isati yatevedza mitemo, zvichikonzera matambudziko asati aongororwa zvitupa zvinodhura.

Transformer Dhizaini uye Kudzivirira kune AC-DC Power Supplies

Iyo transformer inotonga AC-DC inoshandura PCB mutengo uye kuita. Kubatanidzwa kusina kunaka kunoramba kudhura kwe transformer optimization. Mount transformers ine mvumo yakakwana yekutonhodza mhepo. Vatungamirire kuti vaderedze kubatana kwemunda kuita maseketi ekudzora.

Nzira dzekudzivirira dzinoshanda:

• Nhoo dzemhangura pakati pekutanga uye yechipiri windings inoderedza zvakajairika-modhi ruzha
• Flux mabhendi akatenderedza cores ane magineti minda
• Strategic kuiswa kunoderedza kubatanidza kune yekupinza sefa zvikamu

Kune maPCB e-high-frequency LLC converter uye magadzirirwo e resonant converter, ma planar transformers akabatanidzwa muPCB anoderedza kukwirira uye anovandudza kugona kudzokororwa. Hunhu hwedu hwekugadzira maPCB hunosanganisira kugadzirwa kwe embedded planar transformer ine controlled impedance windings.

Input Circuit Protection yeAC-DC Power Boards

Kuyedzwa kweLab hakuite zvemhando yemagetsi emaindasitiri. Real AC mains anosanganisira masurges, sags, uye anopfuudza izvo zvinoparadza zvisina kudzivirirwa maconverter. Shandisa akawanda ekudzivirira layer:

Mutsara wekutanga: Machubhu ekuburitsa gasi kana maTVS diode ekukwira kukuru.

Kune AC-DC inoshandura PCB magadzirirwo munzvimbo dzeindasitiri, wedzera chikamu-kurasikirwa kuona uye brownout dziviriro. Zvimwe zvikamu zvinodhura mapeni asi kudzivirira kutadza kwemumunda kunodhura zviuru.

Thermal Management Dhizaini yePower Supply PCBs

Mazhinji emazuva ano anoshandura AC-DC anofanirwa kushanda pasina mafeni nekuda kwekuvimbika uye zvikonzero zveruzha. Izvi zvinoda kungwarira dhizaini yekupisa kubva paPCB level kumusoro. Shandisa thermal modeling kutanga mukugadzira-kugadzirisa matambudziko ekupisa mushure mekugadzirisa marara mavhiki.

Practical thermal management:

• Position heat-generating components for natural convection flow
• Shandisa mhangura yekudira sezviparadziri zvekupisa, kwete kungotakura ikozvino
• Funga nezve PCB yekumisikidza mune yekupedzisira chigadzirwa-akamira mabhodhi anotonhorera zvirinani
• Isa kudzima kwemafuta pamberi pezvikamu zvapfuura zviyero

Iyo ichangoburwa 150W adapta yakawana kushanda kusina fan nekugadzirisa chikamu chekuiswa kwe convection. Tembiricha yeJunction yakadzikira 20°C kana ichienzaniswa nemagadzirirwo ekutanga, zvichibvisa kudiwa kwekutonhodzwa kwekumanikidza.

Output Rectification Circuit Design Techniques

Synchronous rectification inovandudza kushanda zvakanaka asi inoomesa dhizaini. Kune zvinobuda pazasi 3.3V, synchronous rectification inosungirwa pakuita zvinogamuchirika. Pamusoro pe12V, maSchottky diode anowanzo kupa zvirinani kuita kwese uchifunga kuoma uye mutengo.

Sekondari-divi dhizaini mazano:

• Isa zvigadziriso nekukurumidza padhuze netransformer sekondari
• Shandisa akafanana Schottky diodes ane yakaringana ikozvino kugovera
• Shandisa zvakakodzera kufa-nguva kutonga kune synchronous rectifiers
• Wedzera zvinobuda mafirita saizi yeripple chaiyo yazvino, kwete kungoita ripple voltage

Maitiro edu ekugadzira maPCB ePower Electronics anosanganisira thermal imaging kuti tione kuti magetsi ari kugoverwa zvakaenzana mu parallel rectifier configurations.

Maitiro Ekugadzirira Simba rekupa Chengetedza Chitupa

Dhizaini yetifiketi kubva pakutanga. Kudzoreredza maficha ekuchengetedza mushure medhizaini inovimbisa kunonoka uye kukwira kwemutengo. Maka kuchengetedza-akakosha zvikamu zvakajeka pane schematics uye PCB silkscreen. Shandisa zvikamu zvakatenderwa neajensi chete munzvimbo dzakachengeteka-dzakakosha.

Certification accelerators:

• Chengetedza mafaera ekuchengetedza chikamu ane zvitupa zveajensi
• Document creepage/clearance analysis isati yarongwa
• Shandisa madhizaini eshanduko akasimbiswa ane mishumo yekuchengeteka iripo
• Shandisa fusing pane zvakajairwa zvinodiwa, kwete zvekudzivirira chete

Batana neHighleap Electronics for Electronic Manufacturing Service inonzwisisa zvinodiwa zvekuchengetedza mumisika yepasi rose. Tichakubatsira kudzivirira matambudziko ekupa zvitupa uku uchigadzirisa mashandiro uye mutengo.

Mibvunzo Inowanzo bvunzwa Nezve AC-DC Converter PCB Dhizaini

Ndeipi misiyano yakakosha pakati peKirasi I neKirasi II AC-DC magetsi ekupa PCB zvinodiwa?

Magetsi eKirasi I anoda inodzivirira pasi pasi uye basic insulation, nepo Kirasi II (yakapetwa-yakavharirwa) madhizaini anoda yakasimbiswa insulation pasina kuvimba nekuchengetedzwa kwevhu. Kune AC-DC simba rekushandura PCB magadzirirwo, Kirasi II inoda madaro akakura epagepage (kazhinji 6-8mm ye230VAC) uye yekuwedzera zvipingamupinyi zvekudzivirira. Kunzwisisa aya kupatsanurwa kwekutanga kunodzivirira dhizaini inodhura uye inova nechokwadi chekuteedzera mitemo yekuchengetedza pasi rese seIEC 62368-1.

Kuiswa kwechikamu kunokanganisa sei kuita kweEMI mukuchinja-modhi magetsi ekupa PCBs?

Optimal chikamu chekuiswa kwakakosha kune yakaderera-EMI magetsi emagetsi dhizaini. Iyo yekuisa sefa inofanirwa kuiswa padhuze neiyo AC yekubatanidza yekubatanidza, neiyo PFC yedunhu ichitevera nekukurumidza. Chengetedza yakakwira-frequency switching nodes kure neanonzwa analog control maseketi uye chengetedza kupatsanurwa kwakaringana pakati pekutanga uye yechipiri mativi. Kuiswa kwakarongeka kunogona kuderedza EMI ne10-15dB, kurerutsa kuyedzwa kwekuteerera kwekuchinja-modhi magetsi ekupa PCB application.

Ndezvipi zvakanakira kushandisa planar magineti mune yakakwirira-density AC-DC inoshandura dhizaini?

Planar magineti inopa mabhenefiti akati wandei kune compact AC-DC simba rekushandura mashandisirwo: yakaderedzwa mbiri kureba (60-80% yakaderera pane yakajairwa shandurudzo), yakanakisa kupisa kwemafuta nekuda kwenzvimbo yakakura yepasi, yakagadziridzwa kuberekana nePCB-based windings, uye zvirinani EMI maitiro kuburikidza nekudzora kuvuza inductance. Aya mabhenefiti anoita kuti planar transformers ive yakanaka kune yakakwirira-simba-density PCB dhizaini munzvimbo-inomanikidzwa maapplication senge michina yekurapa uye maindasitiri ekutonga.