Iji mezuo ihe ndị chọrọ ikpo ọkụ nke ngwa, ndị na-emepụta kwesịrị iji tụnyere njirimara okpomọkụ nke ụdị ngwugwu semiconductor dị iche iche.N'edemede a, Nexperia na-atụle ụzọ ọkụ nke ngwugwu njikọ waya ya na ngwungwu mgbawa ka ndị na-emepụta wee họrọ ngwugwu dabara adaba.
Kedu ka esi enweta njikwa ọkụ na ngwaọrụ ejikọ waya
The isi okpomọkụ sink na a waya bonded ngwaọrụ sitere na nkwụsịtụ ntụaka aka na solder nkwonkwo na e biri ebi sekit osisi (PCB), dị ka e gosiri na Figure 1. Ịgbaso a mfe algọridim nke mbụ-usoro approximation, mmetụta nke abụọ ike. ọwa oriri (e gosiri na ọnụ ọgụgụ) bụ negligible na thermal iguzogide ngụkọta oge.
Ọwa okpomọkụ dị na ngwaọrụ ejikọtara waya
Ọwa ntụgharị ọkụ abụọ na ngwaọrụ SMD
Ọdịiche dị n'etiti ngwugwu SMD na ngwugwu ejikọta waya n'ihe gbasara ikpo ọkụ bụ na enwere ike ịgbasa ọkụ sitere na njikọ nke ngwaọrụ ahụ n'akụkụ ọwa abụọ dị iche iche, ya bụ, site na leadframe (dị ka ọ dị na ngwugwu ejikọta waya) na site na clip etiti.
Nyefe ọkụ na ngwugwu jikọtara mgbawa
Nkọwa nke nguzogide okpomọkụ nke nkwụsị na nkwonkwo na-ejikọta Rth (j-sp) na-agbagwoju anya site na ọnụnọ nke nkwonkwo nkwonkwo abụọ.Ihe ntụaka ndị a nwere ike ịnwe okpomọkụ dị iche iche, na-eme ka nguzogide okpomọkụ bụrụ netwọk yiri ya.
Nexperia na-eji otu usoro ahụ wepụta uru Rth(j-sp) maka ma ngwaọrụ ejiri mgbawa na nke ejiri waya.Uru a na-egosipụta isi ụzọ thermal site na mgbawa gaa na leadframe na nkwonkwo solder, na-eme ka ụkpụrụ maka ngwaọrụ mgbawa dị ka ụkpụrụ maka ngwaọrụ ndị na-ere waya na nhazi PCB yiri ya.Agbanyeghị, ọwa nke abụọ anaghị eji nke ọma arụ ọrụ mgbe ị na-ewepụta uru Rth (j-sp), yabụ ikike ikpo ọkụ nke ngwaọrụ ahụ na-adịkarị elu.
N'ezie, ọwa mmiri mmiri ọkụ nke abụọ dị oke egwu na-enye ndị na-emepụta ohere iji melite atụmatụ PCB.Dịka ọmụmaatụ, maka ngwaọrụ a na-ere waya, okpomọkụ nwere ike ịgbasa naanị site na otu ọwa (ọtụtụ okpomọkụ nke diode na-esi na pin cathode);maka ngwaọrụ ejikọtara ọnụ, enwere ike ịgbasa ọkụ na njedebe abụọ ahụ.
Ịme ngosi nke arụmọrụ okpomọkụ nke ngwaọrụ Semiconductor
Nnwale ịme anwansị egosila na arụmọrụ ọkụ nwere ike imeziwanye nke ọma ma ọ bụrụ na ọdụ ngwaọrụ niile dị na PCB nwere ụzọ ọkụ.Dịka ọmụmaatụ, na CFP5-package PMEG6030ELP diode (Njirimara 3), 35% nke okpomọkụ na-ebufe na pin anode site na clamps ọla kọpa na 65% na-ebufe ya na ntụtụ cathode site na ụzọ ndu.
Diode ngwugwu CFP5
"Nnwale ịme anwansị ekwenyela na ikewa ikpo ọkụ n'ime akụkụ abụọ (dị ka e gosiri na foto 4) na-eme ka ikpochapụ okpomọkụ dịkwuo mma.
Ọ bụrụ na 1 cm² heatsink kewara n'ime abụọ 0.5 cm² heatsinks etinyere n'okpuru nke ọ bụla n'ime ọdụ abụọ ahụ, ọnụọgụ ike nke diode nwere ike ịgbasa n'otu ọnọdụ okpomọkụ na-abawanye site na 6%.
Igwe ọkụ abụọ nke 3 cm² na-abawanye nchụpụ ike site na ihe dị ka pasenti 20 ma e jiri ya tụnyere ọkọlọtọ ikpo ọkụ ọkụ ma ọ bụ 6 cm² heatsink etinyere naanị na cathode.
Nsonaazụ Simulation Thermal nwere ọkụ ọkụ na mpaghara dị iche iche na ebe bọọdụ
Nexperia na-enyere ndị nrụpụta aka ịhọrọ ngwugwu ka mma dabara na ngwa ha
Ụfọdụ ndị na-emepụta ngwaọrụ semiconductor adịghị enye ndị na-emepụta ihe ọmụma dị mkpa iji chọpụta ụdị ngwugwu ga-enye arụmọrụ okpomọkụ ka mma maka ngwa ha.N'edemede a, Nexperia na-akọwa ụzọ ọkụ dị na ngwaọrụ ejikọta waya na mgbawa iji nyere ndị na-emepụta aka mee mkpebi ka mma maka ngwa ha.
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Oge nzipu: Sep-13-2023