Kazhinji kunzwa "grounding inonyanya kukosha", "inoda kusimbisa kugadzirwa kwepasi" nezvimwe zvakadaro.Muchokwadi, muPCB dhizaini yebooster DC/DC converters, dhizaini yekugadzika pasina kutarisisa kwakakwana uye kutsauka kubva pamitemo yekutanga ndicho chikonzero chedambudziko.Ziva kuti chenjedzo dzinotevera dzinoda kunyatsoteedzerwa.Uye zvakare, izvi zvinotariswa hazvingogumiri kune booster DC/DC converters.
Ground Connection
Chekutanga, analogi diki chiratidzo kudzika uye simba pasi kunofanirwa kuparadzaniswa.Muchidimbu, marongerwo ekugadzirisa simba haadi kuparadzaniswa kubva kumusoro kwepamusoro nekuderera kwekudzivirira wiring uye kunaka kwekupisa kupisa.
Kana simba rekugadzika rakaparadzaniswa uye rakabatanidzwa kumusana kuburikidza negomba, migumisiro yegomba rekudzivirira uye inductors, kurasikirwa uye ruzha zvichawedzera.Nekudzivirira, kupisa kupisa uye kuderedza DC kurasikirwa, tsika yekuisa pasi mukati memukati kana kumashure inongova yekubatsira ivhu.
Kana iyo yepasi pasi yakagadziriswa mukati memukati kana kumashure kwe-multilayer circuit board, kunyanya kukoshesa kunofanira kubhadharwa kune kugadzika kwemasimba emagetsi ane ruzha rwakawanda rwe-high-frequency switch.Kana chikamu chechipiri chine simba rekubatanidza simba rakagadzirirwa kuderedza kurasikirwa kweDC, batanidza chikamu chepamusoro kune chechipiri chechipiri uchishandisa maburi-maburi kuti uderedze kukanganisa kwesimba remagetsi.
Uye zvakare, kana paine nzvimbo yakajairika pachikamu chechitatu uye chiratidzo chepasi pachikamu chechina, kubatana pakati pesimba rekugadzirisa uye rechitatu nerechina mativi kunongobatanidzwa kune yekugadzika kwesimba padhuze neiyo capacitor yekupinza apo iyo yakakwirira-frequency switching ruzha. zvishoma.Usabatanidza kudzika kwesimba kweiyo ruzha kubuda kana diode dzazvino.Ona dhayagiramu yechikamu pazasi.
Zvinhu Zvikuru:
1.PCB marongerwo emhando yebooster DC/DC converter, AGND uye PGND inoda kupatsanurwa.
2.In musimboti, PGND muPCB marongerwo e booster DC/DC converters inogadziriswa padanho repamusoro pasina kupatsanurwa.
3.In booster DC / DC converter PCB marongerwo, kana PGND yakaparadzaniswa uye yakabatanidzwa kumusana kuburikidza negomba, kurasikirwa uye ruzha zvichawedzera nekuda kwekukanganiswa kwegomba rekudzivirira uye inductance.
4.Mukurongeka kwePCB yebooster DC/DC converter, apo multilayer circuit board yakabatana nevhu mukati memukati kana kumashure, teerera kukubatana pakati pekuisa terminal neruzha rukuru rwepamusoro-frequency. chinja uye PGND ye diode.
5.Muiyo PCB dhizaini ye booster DC/DC converter, iyo yepamusoro PGND yakabatana neiyo yemukati PGND kuburikidza neakawanda kuburikidza-maburi kudzikisa impedance uye DC kurasikirwa.
6.Mukurongeka kwePCB yebooster DC/DC converter, kubatana pakati penzvimbo yakajairika kana chiratidzo chepasi uye PGND inofanira kuitwa paPGND pedyo necapacitor inobuda ine ruzha rushoma rwe-high-frequency switch, kwete panzvimbo yekuisa ruzha rwakawanda kana PGN padyo ne diode.