Ngokuqhelekileyo ukuva "ukugxilwa kubaluleke kakhulu", "isidingo sokuqinisa uyilo lokumisa" njalo njalo. Enyanisweni, kwi-PCB layout ye-booster DC / DC converters, i-grounding design ngaphandle kokuqwalaselwa ngokwaneleyo kunye nokuphambuka kwimithetho esisiseko ngunobangela wengxaki. Qaphela ukuba la manyathelo okhuseleko alandelayo kufuneka alandelwe ngokungqongqo. Ukongeza, ezi ngqwalasela azikhawulelwanga kwi-booster DC/DC converters.
uQhagamshelwano loMhlaba
Okokuqala, ukubekwa kwe-analog encinci kunye nokubekwa kwamandla kufuneka kwahlulwe. Ngokomgaqo, i-layout of grounding yamandla ayifuni ukuba ihlulwe kuluhlu oluphezulu kunye nokuxhatshazwa kwe-wiring ephantsi kunye nokutshatyalaliswa kobushushu obuhle.
Ukuba isiseko samandla siyahlukana kwaye sixhunywe ngasemva ngomngxuma, imiphumo yokumelana nomngxuma kunye ne-inductors, ilahleko kunye nengxolo iya kuba nzima. Ukukhusela, ukutshatyalaliswa kobushushu kunye nokunciphisa ilahleko ye-DC, umkhuba wokubeka umhlaba kwinqanaba elingaphakathi okanye ngasemva kukuncedisa kuphela.
Xa uluhlu lwesiseko luyilwe kwinqanaba langaphakathi okanye ngasemva kwibhodi yesekethe ye-multilayer, ingqwalasela ekhethekileyo kufuneka ihlawulwe kwisiseko sokunikezelwa kwamandla kunye nengxolo engaphezulu yokutshintsha kwe-high-frequency switch. Ukuba umaleko wesibini unomaleko woqhagamshelo lwamandla olwenzelwe ukunciphisa ilahleko yeDC, qhagamshela umaleko ongaphezulu ukuya kumaleko wesibini usebenzisa imingxunya emininzi yokunciphisa i-impedance yomthombo wamandla.
Ukongeza, ukuba kukho umhlaba oqhelekileyo kwinqanaba lesithathu kunye nomhlaba wesignali kwinqanaba lesine, uxhulumaniso phakathi kwesiseko samandla kunye nesesithathu kunye nesesine umaleko uqhagamshelwe kuphela kwisiseko samandla kufuphi ne-capacitor yokufaka apho ingxolo ephezulu yokutshintsha. incinci. Musa ukudibanisa isiseko samandla semveliso enengxolo okanye iidiode zangoku. Jonga umzobo wecandelo ngezantsi.
Amanqaku aphambili:
Uyilo lwe-1.PCB kuhlobo lwe-booster DC/DC converter, i-AGND kunye ne-PGND zifuna ukwahlukana.
2.Ngomgaqo, i-PGND kwi-PCB layout ye-booster DC / DC converters iqwalaselwe kwinqanaba eliphezulu ngaphandle kokuhlukana.
3.Kwi-booster DC / DC converter layout PCB, ukuba i-PGND ihlukaniswe kwaye idibaniswe ngasemva ngomngxuma, ilahleko kunye nengxolo iya kwanda ngenxa yempembelelo yokumelana nomngxuma kunye ne-inductance.
4.Kwi-PCB layout ye-booster DC / DC converter, xa ibhodi yesekethe ye-multilayer idityaniswe phantsi kwinqanaba elingaphakathi okanye ngasemva, qaphela uxhulumaniso phakathi kwe-terminal igalelo kunye nengxolo ephezulu ye-high-frequency. tshintsha kunye ne-PGND ye-diode.
5.Kwi-PCB layout ye-booster DC/DC converter, i-PGND ephezulu iqhagamshelwe kwi-PGND yangaphakathi ngokusebenzisa imingxunya emininzi ukunciphisa i-impedance kunye nelahleko ye-DC.
6.Kwi-PCB layout ye-booster DC/DC converter, uxhulumaniso phakathi komhlaba oqhelekileyo okanye umhlaba wesignali kunye ne-PGND kufuneka yenziwe kwi-PGND kufuphi ne-capacitor ephumayo kunye nesandi esincinci sokutshintsha kwe-high-frequency switch, kungekhona kwi-terminal igalelo kunye. ingxolo eyongezelelekileyo okanye i-PGN kufutshane ne-diode.