Ngokuvamile ukuzwa "ukugxilisa kubaluleke kakhulu", "isidingo sokuqinisa umklamo wokumisa" nokunye.Eqinisweni, kusakhiwo se-PCB seziguquli ze-booster DC/DC, ukwakheka komhlaba ngaphandle kokucatshangelwa okwanele kanye nokuphambuka emithethweni eyisisekelo yimbangela eyinhloko yenkinga.Qaphela ukuthi lezi zinyathelo zokuphepha ezilandelayo zidinga ukulandelwa ngokuqinile.Ngaphezu kwalokho, lokhu kucatshangelwa akukhawulelwe kuma-booster DC/DC converters.
Ukuxhumana Kwaphansi
Okokuqala, ukugxilisa isignali encane ye-analog kanye nokugxilisa amandla kufanele kuhlukaniswe.Ngokomthetho, ukuhlelwa kwesisekelo samandla akudingi ukuhlukaniswa nongqimba oluphezulu olunokumelana okuphansi kwe-wiring kanye nokushisa okuhle kokushisa.
Uma isisekelo samandla sihlukaniswa futhi sixhunywe ngemuva ngembobo, imiphumela yokumelana nembobo nama-inductors, ukulahlekelwa nomsindo kuzoba kubi kakhulu.Ukuvikela, ukuchithwa kokushisa nokunciphisa ukulahlekelwa kwe-DC, umkhuba wokumisa phansi kungqimba lwangaphakathi noma ngemuva kuwukusekela okuyisizayo kuphela.
Uma ungqimba oluphansi luklanyelwe ungqimba lwangaphakathi noma ngemuva kwebhodi lesifunda se-multilayer, ukunakwa okukhethekile kufanele kukhokhwe ekusekelweni kwamandla kagesi ngomsindo owengeziwe wokushintshwa kwe-high-frequency.Uma isendlalelo sesibili sinesendlalelo sokuxhuma amandla esiklanyelwe ukunciphisa ukulahlekelwa kwe-DC, xhuma isendlalelo esingaphezulu kusendlalelo sesibili usebenzisa izimbobo zokudlula eziningi ukuze unciphise ukuvinjelwa komthombo wamandla.
Ukwengeza, uma kukhona okujwayelekile kungqimba lwesithathu kanye nomhlabathi wesignali esendlaleni sesine, ukuxhumana phakathi kwamandla aphansi kanye nezendlalelo zesithathu nesine kuxhunywe kuphela endaweni yamandla eduze kwe-capacitor yokufaka lapho umsindo wokushintsha imvamisa ephezulu. incane.Ungaxhumi amandla aphansi okukhiphayo okunomsindo noma ama-diode amanje.Bheka umdwebo wesigaba ngezansi.
Amaphuzu Abalulekile:
1.Isakhiwo se-PCB ku-booster type converter DC/DC, i-AGND ne-PGND zidinga ukuhlukaniswa.
2.Eqinisweni, i-PGND kusakhiwo se-PCB seziguquli ze-booster DC/DC ilungiselelwe ezingeni eliphezulu ngaphandle kokuhlukana.
3.Ku-booster DC/DC converter PCB layout, uma i-PGND ihlukaniswa futhi ixhunywe ngemuva ngembobo, ukulahlekelwa nomsindo kuzokwanda ngenxa yomthelela wokumelana nembobo kanye ne-inductance.
4.Ekuhlelweni kwe-PCB yesiguquli se-booster DC/DC, lapho ibhodi lesekethe le-multilayer lixhunywe phansi kungqimba lwangaphakathi noma ngemuva, naka ukuxhumana phakathi kwetheminali yokufaka enomsindo ophezulu we-high-frequency. shintsha kanye ne-PGND ye-diode.
5.Kusakhiwo se-PCB se-booster DC/DC converter, i-PGND ephezulu ixhunywe ku-PGND yangaphakathi ngokusebenzisa izimbobo eziningi ukuze kuncishiswe i-impedance kanye nokulahlekelwa kwe-DC.
6.Ekuhlelweni kwe-PCB yesiguquli se-booster DC/DC, ukuxhumana phakathi kwendawo evamile noma indawo yesiginali kanye ne-PGND kufanele kwenziwe ku-PGND eduze kwe-capacitor ekhiphayo ngomsindo omncane weswiwi ye-high-frequency, hhayi endaweni yokufaka umsindo owengeziwe noma i-PGN eduze kwe-diode.