Nthawi zambiri amamva "kuyika pansi ndikofunikira kwambiri", "kufunika kulimbikitsa mapangidwe apansi" ndi zina zotero. M'malo mwake, mu mawonekedwe a PCB a zosinthira zolimbitsa thupi za DC/DC, mapangidwe apansi osaganizira mokwanira komanso kupatuka pamalamulo oyambira ndizomwe zimayambitsa vutoli. Dziwani kuti njira zotsatirazi ziyenera kutsatiridwa. Kuphatikiza apo, malingaliro awa samangokhala paotembenuza ma booster DC/DC.

Ground Connection

Choyamba, ma analogi ang'onoang'ono oyambira ndi kuyika mphamvu ayenera kulekanitsidwa. M'malo mwake, makonzedwe a kukhazikitsa mphamvu sikuyenera kupatulidwa kuchokera pamwamba ndi kukana kwa waya wochepa komanso kutentha kwabwino kwa kutentha.

Ngati maziko a mphamvu akulekanitsidwa ndikugwirizanitsa kumbuyo kupyolera mu dzenje, zotsatira za kukana dzenje ndi ma inductors, zotayika ndi phokoso zidzaipiraipira. Kuteteza, kutenthetsa kutentha ndi kuchepetsa kutayika kwa DC, chizolowezi choyika pansi mkati mwa wosanjikiza kapena kumbuyo ndikungoyambira kothandizira.

Pamene malo oyambira amapangidwira mkati mwa chipinda chamkati kapena kumbuyo kwa bolodi la dera la multilayer, chidwi chapadera chiyenera kuperekedwa kwa kukhazikitsidwa kwa magetsi ndi phokoso lowonjezereka la kusintha kwapamwamba kwambiri. Ngati gawo lachiwiri liri ndi chingwe cholumikizira mphamvu chomwe chimapangidwira kuchepetsa kutayika kwa DC, gwirizanitsani pamwamba pa gawo lachiwiri pogwiritsa ntchito mabowo angapo kuti muchepetse kutsekeka kwa gwero la mphamvu.

Kuonjezera apo, ngati pali malo omwe amapezeka pamtunda wachitatu ndi chizindikiro pamtunda wachinayi, kugwirizana pakati pa kuyika mphamvu ndi gawo lachitatu ndi lachinayi kumangogwirizanitsidwa ndi kuyika kwa mphamvu pafupi ndi capacitor yolowera kumene phokoso lapamwamba kwambiri losinthira. ndi zochepa. Osalumikiza kuyika kwamphamvu kwa phokoso laphokoso kapena ma diode apano. Onani chithunzi pansipa.

Mfundo zazikuluzikulu:
1.PCB masanjidwe pa chilimbikitso mtundu DC/DC Converter, ndi AGND ndi PGND ayenera kulekana.
2.In Mfundo, PGND mu PCB masanjidwe a chilimbikitso DC/DC converters kukhazikitsidwa pa mlingo wapamwamba popanda kulekana.
3.Mu chilimbikitso cha DC / DC chosinthira ma PCB, ngati PGND imasiyanitsidwa ndi kulumikizidwa kumbuyo kudzera mu dzenje, kutayika ndi phokoso zidzawonjezeka chifukwa cha kukhudzidwa kwa dzenje ndi inductance.
4.Mu mawonekedwe a PCB a chosinthira chowonjezera cha DC / DC, pomwe bolodi lozungulira la multilayer limalumikizidwa pansi pagawo lamkati kapena kumbuyo, tcherani khutu ku kulumikizana pakati pa cholumikizira cholowera ndi phokoso lalikulu la ma frequency apamwamba. kusintha ndi PGND ya diode.
5.Mu mawonekedwe a PCB a chosinthira cha DC/DC, PGND yapamwamba imalumikizidwa ndi PGND yamkati kudzera m'mabowo angapo kuti muchepetse kulephera komanso kutaya kwa DC.
6.Mu mawonekedwe a PCB a chosinthira chowonjezera cha DC/DC, kulumikizana pakati pa malo wamba kapena malo olumikizirana ndi PGND kuyenera kupangidwa ku PGND pafupi ndi capacitor yotulutsa ndi phokoso lochepa la switch-frequency switch, osati pamalo olowera ndi phokoso lambiri kapena PGN pafupi ndi diode.