Ukunyaniseka kwamandla (PI)

Ukudityaniswa kwamandla, okubizwa ngokuba yi-PI, kukuqinisekisa ukuba i-voltage kunye ne-current yomthombo waMandla kunye nendawo ekuyiwa kuyo ihlangabezana neemfuno. Ingqibelelo yamandla ihlala ingomnye weyona mingeni inkulu kuyilo lwePCB enesantya esiphezulu.

Umgangatho wengqibelelo yamandla ubandakanya inqanaba letshiphu, inqanaba lokupakishwa kwetshiphu, inqanaba lebhodi yesekethe kunye nenqanaba lenkqubo. Phakathi kwabo, ingqibelelo yamandla kwinqanaba lebhodi yesekethe kufuneka ihlangabezane nezi mfuno zintathu zilandelayo:

1. Yenza i-voltage ripple kwi-chip pin encinci kunenkcazo (umzekelo, impazamo phakathi kombane kunye ne-1V ingaphantsi kwe-+/ -50mv);

2. Lawula i-rebound yomhlaba (eyaziwa ngokuba yi-synchronous switching ingxolo ye-SSN kunye ne-synchronous switching output SSO);

I-3, ukunciphisa ukuphazamiseka kwe-electromagnetic (EMI) kunye nokugcina ukuhambelana kwe-electromagnetic (EMC): inethiwekhi yokusabalalisa amandla (i-PDN) ngoyena mqhubi omkhulu kwibhodi yesekethe, ngoko ke i-eriyali elula ukuyihambisa kunye nokufumana ingxolo.

Ingxaki yokuthembeka kwamandla

Ingxaki yonikezelo lwamandla imfezeko ibangelwa ikakhulu kuyilo olungekho ngqiqweni lwe-decoupling capacitor, impembelelo enzulu yesekethe, ulwahlulo olubi lonikezelo lwamandla amaninzi / inqwelomoya ephantsi, uyilo olungekho ngqiqweni lokubunjwa kunye nokungalingani kwangoku. Ngokusebenzisa ukulinganisa ingqibelelo yamandla, ezi ngxaki zafunyanwa, kwaye ke iingxaki zemfezeko yamandla zasonjululwa ngezi ndlela zilandelayo:

(1) ngokulungelelanisa ububanzi bomgca we-lamination we-PCB kunye nobukhulu bomaleko we-dielectric ukuhlangabezana neemfuno ze-impedance yeempawu, ukulungelelanisa isakhiwo se-lamination ukuhlangabezana nomgaqo omfutshane wokubuyela umva womgca wesignali, ukulungelelanisa ukunikezelwa kwamandla / ulwahlulo lwendiza yomhlaba, ukuphepha isenzeko sokwahlulwahlulwa komgca wesignali ebalulekileyo;

(2) uhlalutyo lwe-impedance yamandla lwenziwa kunikezelo lwamandla olusetyenziswa kwi-PCB, kwaye i-capacitor yongezwa ukulawula ukunikezelwa kwamandla ngaphantsi kwe-impedance ekujoliswe kuyo;

(3) kwinxalenye enoxinano oluphezulu lwangoku, lungisa indawo yesixhobo ukwenza umsinga udlule ngendlela ebanzi.

Uhlalutyo lwentembeko yamandla

Kuhlalutyo lwentembeko yamandla, ezona ntlobo zokulinganisa ziphambili zibandakanya uhlalutyo lokuhla kombane we-dc, uhlalutyo lokuqhawula kunye nohlalutyo lwengxolo. Uhlalutyo lokuhla kwamandla ombane we-Dc lubandakanya uhlalutyo lweentambo ezintsonkothileyo kunye neemilo zenqwelomoya kwi-PCB kwaye inokusetyenziselwa ukumisela ukuba mangakanani amandla ombane aya kulahleka ngenxa yokuxhathisa kobhedu.

Ibonisa ukuxinana kwangoku kunye neegrafu zobushushu "zeendawo ezishushu" kwi-PI / i-thermal co-simulation

Uhlalutyo lokuqhawula ngokuqhelekileyo luqhuba utshintsho kwixabiso, uhlobo, kunye nenani le-capacitors elisetyenziswe kwi-PDN. Ngoko ke, kuyimfuneko ukubandakanya i-parasitic inductance kunye nokuchasana kwemodeli ye-capacitor.

Uhlobo lohlalutyo lwengxolo lunokwahluka. Ziyakwazi ukubandakanya ingxolo evela kwi-IC izikhonkwane zamandla ezisasaza ngeenxa zonke kwibhodi yesekethe kwaye inokulawulwa ngokudibanisa i-capacitors. Ngokuhlalutya ingxolo, kunokwenzeka ukuphanda indlela ingxolo edityaniswa ngayo ukusuka komnye umngxuma ukuya komnye, kwaye kunokwenzeka ukuhlalutya ingxolo yokutshintsha okuhambelanayo.