Power integrity (PI)
Power Integrality, e bitsoang PI, ke ho netefatsa hore na motlakase le motlakase oa mohloli oa Motlakase le sebaka seo li eang ho sona li fihlela litlhoko. Botšepehi ba matla e ntse e le e 'ngoe ea liqholotso tse kholo ka ho fetisisa moralong oa PCB oa lebelo le holimo.
Boemo ba botšepehi ba matla bo kenyelletsa boemo ba chip, boemo ba ho paka chip, boemo ba boto ea potoloho le boemo ba sistimi. Har'a bona, botšepehi ba matla boemong ba boto ea potoloho bo lokela ho finyella litlhoko tse tharo tse latelang:
1. Etsa hore motlakase o fokotsehe pineng ea chip e nyane ho feta tlhaloso (mohlala, phoso pakeng tsa voltage le 1V e ka tlaase ho +/ -50mv);
2. Laola fatše (hape e tsejoa e le synchronous switching lerata la SSN le synchronous switching output SSO);
3, fokotsa ho kena-kenana le motlakase (EMI) le ho boloka ho lumellana ha motlakase (EMC) : marang-rang a kabo ea matla (PDN) ke conductor e kholo ka ho fetisisa boto ea potoloho, ka hona ke antenna e bonolo ho fetisa le ho amohela lerata.
Bothata ba botšepehi ba matla
Bothata ba botšepehi ba phepelo ea matla bo bakoa haholo-holo ke moralo o sa utloahaleng oa decoupling capacitor, tšusumetso e tebileng ea potoloho, karohano e mpe ea phepelo ea matla a mangata / sefofane sa fatše, moralo o sa utloahaleng oa sebopeho le hona joale o sa lekanang. Ka papiso ea botšepehi ba matla, mathata ana a ile a fumanoa, 'me mathata a botšepehi ba matla a rarolloa ka mekhoa e latelang:
(1) ka ho fetola bophara ba PCB lamination line le botenya ba dielectric lera ho kopana le ditlhoko tsa tšobotsi impedance, ho lokisa sebopeho lamination ho kopana le molao-motheo oa tsela e khutsoanyane backflow ea mola pontšo, ho lokisa phepelo ea matla / fatše sefofane segmentation, ho qoba ts'ebetso ea karolo ea bohlokoa ea ho arola melapo ea mohala oa matšoao;
(2) tlhahlobo ea ho thibela matla e ile ea etsoa bakeng sa phepelo ea motlakase e sebelisoang ho PCB, 'me capacitor e ile ea eketsoa ho laola phepelo ea motlakase ka tlase ho sepheo sa sepheo;
(3) karolong e nang le boima bo phahameng ba hona joale, fetola boemo ba sesebelisoa ho etsa hore hona joale ho fete ka tsela e pharaletseng.
Tlhahlobo ea botšepehi ba matla
Tlhahlobong ea botšepehi ba matla, mefuta e ka sehloohong ea ketsiso e kenyelletsa tlhahlobo ea ho theoha ha motlakase oa dc, tlhahlobo ea ho kopanya le tlhahlobo ea lerata. Dc voltage drop analysis e kenyelletsa tlhahlobo ea lithapo tse rarahaneng le libopeho tsa sefofane ho PCB mme e ka sebelisoa ho fumana hore na motlakase o tla lahleheloa ke bokae ka lebaka la ho hana ha koporo.
E bonts'a likhakanyo tsa hajoale le li-graph tsa mocheso oa "hot spots" ho PI / thermal co-simulation
Tlhahlobo ea ho kopanya hangata e tsamaisa liphetoho boleng, mofuta, le palo ea li-capacitor tse sebelisoang ho PDN. Ka hona, hoa hlokahala ho kenyelletsa inductance ea parasitic le ho hanyetsa mohlala oa capacitor.
Mofuta oa tlhahlobo ea lerata o ka fapana. Li ka kenyelletsa lerata le tsoang ho lithapo tsa matla tsa IC tse jalang ho potoloha boto ea potoloho mme li ka laoloa ke li-decoupling capacitor. Ka tlhahlobo ea lerata, hoa khoneha ho batlisisa hore na lerata le kopanngoa joang ho tloha lesoba le leng ho ea ho le leng, 'me hoa khoneha ho hlahloba lerata la ho fetoha ha synchronous.