Ike ike (PI)

Ịdị n'otu ike, nke a na-akpọ PI, bụ iji gosi ma voltaji na ugbu a nke isi iyi ike na ebe njedebe na-emezu ihe achọrọ. Iguzosi ike n'ezi ihe ka bụ otu n'ime nnukwu ihe ịma aka na imewe PCB dị elu.

Ọkwa nke ike iguzosi ike n'ezi ihe gụnyere ọkwa mgbawa, ọkwa nkwakọ ngwaahịa mgbawa, ọkwa bọọdụ sekit na ọkwa sistemụ. N'ime ha, ike iguzosi ike n'ezi ihe na ọkwa sekit kwesịrị iru ihe atọ a chọrọ:

1. Mee ka voltaji ripple na mgbawa pin obere karịa nkọwapụta (dịka ọmụmaatụ, njehie n'etiti voltaji na 1V bụ ihe na-erughị +/ -50mv);

2. Njikwa nkwụghachi azụ nke ala (nke a makwaara dị ka ụda mgbanwe mgbanwe SSN na synchronous switching mmepụta SSO);

3, belata nnyonye anya electromagnetic (EMI) ma nọgide na-enwe ndakọrịta elektrọnik (EMC): netwọk ike nkesa (PDN) bụ onye ndu kachasị na bọọdụ sekit, yabụ ọ bụkwa antenna kacha mfe iji bufee na ịnata mkpọtụ.

Nsogbu iguzosi ike n'ezi ihe

The ike ọkọnọ iguzosi ike n'ezi nsogbu nsogbu bụ tumadi mere site enweghị ezi uche imewe nke decoupling capacitor, oké njọ mmetụta nke sekit, ọjọọ segmentation nke multiple ike ọkọnọ / ala ụgbọ elu, na-enweghị ezi uche imewe nke e guzobere na na-ezighị ezi ugbu a. Site na ịme anwansị ike ike, a chọtara nsogbu ndị a, wee dozie nsogbu iguzosi ike n'ezi ike site na ụzọ ndị a:

(1) site n'ịgbanwe obosara nke PCB lamination akara na ọkpụrụkpụ nke dielectric oyi akwa izute chọrọ nke e ji mara impedance, imezi lamination Ọdịdị izute ụkpụrụ nke mkpụmkpụ backflow ụzọ nke mgbaàmà akara, na-edozi ike ọkọnọ / ala ụgbọ elu nkewa, na-ezere ihe dị mkpa nke akara mgbaama ogologo nkebi;

(2) A na-eduzi nyocha nke impedance ike maka ọkụ eletrik eji na PCB, na capacitor na-agbakwunyere iji chịkwaa ọkụ eletrik n'okpuru ihe mgbochi ebumnuche;

(3) na akụkụ nke nwere nnukwu njupụta dị ugbu a, gbanwee ọnọdụ ngwaọrụ ahụ iji mee ka ọ dị ugbu a gafere n'ụzọ sara mbara.

Nyocha iguzosi ike n'ezi ihe

N'ime nyocha ike iguzosi ike n'ezi ihe, ụdị ịme anwansị bụ isi gụnyere nyocha dc voltaji drop analysis, decoupling analysis na nyocha mkpọtụ. Dc voltaji drop analysis gụnyere nyocha nke mgbagwoju wiring na ụgbọ elu shapes na PCB na enwere ike iji chọpụta ole voltaji ga-efunahụ n'ihi na-eguzogide nke ọla kọpa.

Na-egosiputa njupụta ugbu a na eserese okpomọkụ nke "ebe dị ọkụ" na PI/ thermal co-simulation

Ntụle mkpochapụ na-ebutekarị mgbanwe na uru, ụdị, na ọnụọgụ nke capacitors ejiri na PDN. Ya mere, ọ dị mkpa ịgụnye inductance parasitic na iguzogide ihe nlereanya capacitor.

Ụdị nyocha mkpọtụ nwere ike ịdị iche. Ha nwere ike ịgụnye mkpọtụ sitere na ntụtụ ike IC nke na-agbasa gburugburu bọọdụ sekit ma nwee ike ịchịkwa ya site n'ịkwado capacitors. Site na nyocha mkpọtụ, ọ ga-ekwe omume ịchọpụta ka ụda ahụ si jikọta site n'otu oghere gaa na nke ọzọ, ma ọ ga-ekwe omume nyochaa ụda ntụgharị synchronous.