Simba kuvimbika (PI)

Power Integrality, inonzi PI, ndeyekusimbisa kana voltage uye ikozvino yeSimba sosi uye kwekuenda zvinosangana nezvinodiwa. Simba rekuvimbika rinoramba riri rimwe rematambudziko makuru mukumhanya-mhanya PCB dhizaini.

Iyo nhanho yekusimba kwesimba inosanganisira chip level, chip kurongedza level, redunhu bhodhi level uye system level. Pakati pavo, kutendeseka kwesimba padanho redunhu redunhu kunofanirwa kusangana nezvinotevera zvitatu zvinodiwa:

1. Ita kuti voltage ripple pa chip pin idiki pane yakatarwa (somuenzaniso, kukanganisa pakati pemagetsi uye 1V iri pasi pe +/ -50mv);

2. Kudzora pasi rebound (inozivikanwawo se synchronous switching noise SSN uye synchronous switching output SSO);

3, deredza kukanganiswa kwemagetsi (EMI) uye chengetedza kuenderana kwemagetsi (EMC): magetsi ekugovera network (PDN) ndiyo hombe conductor pabhodhi redunhu, saka ndiyo zvakare antenna iri nyore kufambisa uye kugamuchira ruzha.

Dambudziko rekuvimbika kwesimba

Dambudziko rekutendeseka kwemagetsi rinonyanya kukonzerwa nekusanzwisisika kwekugadzira decoupling capacitor, kukanganisa kwakakomba kwedunhu, iyo yakaipa segmentation yemagetsi akawanda / ndege yepasi, iyo isina musoro dhizaini yekuumbwa uye isina kuenzana ikozvino. Kuburikidza nekuenzanisa kwesimba rekuvimbika, matambudziko aya akawanikwa, uyezve matambudziko ekuvimbika kwesimba akagadziriswa nenzira dzinotevera:

(1) nekugadzirisa hupamhi hwePCB lamination line uye ukobvu hwedielectric layer kuti isangane nezvinodiwa zvehunhu impedance, kugadzirisa iyo lamination chimiro kuti isangane nemusimboti wekupfupika kwekudzokera kumashure kwechiratidzo mutsara, kugadzirisa magetsi / pasi ndege segmentation, kudzivirira chiitiko chechiratidzo chakakosha mutsara span segmentation;

(2) simba impedance ongororo yakaitwa nokuda kwesimba rinoshandiswa paPCB, uye capacitor yakawedzerwa kudzora magetsi pasi pechinangwa chekudzivirira;

(3) muchikamu chine yakakwira ikozvino density, gadzirisa chinzvimbo chechishandiso kuita kuti ikozvino ipfuure nenzira yakafara.

Simba kuvimbika kuongorora

Mukuongorora kwesimba rekuvimbika, iwo makuru ekuenzanisa marudzi anosanganisira dc voltage kudonha ongororo, decoupling ongororo uye ruzha ongororo. Dc voltage kudonha kuongororwa kunosanganisira kuongororwa kweakaomarara wiring uye maumbirwo endege paPCB uye inogona kushandiswa kuona kuti ingani voltage icharasika nekuda kwekupokana kwemhangura.

Inoratidza huwandu hwazvino uye tembiricha magirafu e "nzvimbo dzinopisa" muPI/ thermal co-simulation

Decoupling ongororo inowanzo fambisa shanduko mukukosha, mhando, uye nhamba yemacapacitor anoshandiswa muPDN. Nokudaro, zvakakosha kuisa parasitic inductance uye kushorwa kwemuenzaniso we capacitor.

Mhando yekuongorora ruzha inogona kusiyana. Ivo vanogona kusanganisira ruzha kubva kuIC simba mapini anopararira akatenderedza bhodhi redunhu uye anogona kudzorwa ne decoupling capacitors. Kuburikidza nekuongorora ruzha, zvinokwanisika kuongorora kuti ruzha rwakabatanidzwa sei kubva kune rimwe gomba kuenda kune rimwe, uye zvinokwanisika kuongorora iyo synchronous switching ruzha.