Guhitamo inductor ikwiye ikozwe mu buryo bwa molding (Molding Choke) kuri circuit, atari ukureba gusa, ahubwo no kwibanda ku mikorere yayo ihinduka n'imbogamizi z'umubiri muri circuit.
Udukoresho tw’amashanyarazi twitwa Monolithic dukoreshwa cyane cyane mu miyoboro y’amashanyarazi (nk’abahindura DC-DC) kugira ngo dukore imirimo yo kubika ingufu, kuyungurura, no gukoresha amapine y’amashanyarazi. Kugira ngo tugufashe guhitamo neza, tuzagabanya uburyo bwo guhitamo mu ntambwe eshanu z’ingenzi zikurikira:
1. Kumenya ingano n'ibipfunyika (Intambwe ya 1: Ese bizakwira?)
Iki ni cyo gipimo cy'ibanze cyo gusuzuma. Inductors za monolithic ubusanzwe ni imiterere isanzwe isa n'urukiramende.
* Imbogamizi ku bipimo: Pima ingano n'uburebure bw'udupira twabugenewe kuri PCB. Ingano zisanzwe zirimo 3.0×3.0mm, 4.0×4.0mm, 5.0×5.0mm, nibindi, hamwe n'uburebure buri hagati ya 1.0mm na 5.0mm.
* Igishushanyo cya Terminal: Emeza niba ari pin isanzwe ya "two-terminal" cyangwa pin ya "four-terminal" igamije kugabanya imirasire.
* Icyitonderwa: Nubwo uburebure n'ubugari byaba bimwe, uburebure akenshi bugena ubushobozi bw'ingufu za inductor. Menya neza ko udahisemo idakwiriye.
2. Kubara no guhuza inductance (agaciro ka L)
Inductance igena ingano y'umuvuduko w'amashanyarazi. Guhitamo ko ari munini cyane cyangwa muto cyane bizagira ingaruka ku mikorere myiza y'amashanyarazi.
* Reba igitabo cy'amabwiriza ya chip: Impapuro z'amakuru za circuits nyinshi zihuza amashanyarazi (ICs) zitanga formula zisabwa mu kubara agaciro k'ingufu.
Formula rusange ishobora gupimwa nka L={(V_{in}-V_{out})XV_{out}/{V_{in}Xf_{sw}XI_{out} XRippleRatio}}
* aho f_{sw} ari inshuro yo guhinduranya, naho RippleRatio ikaba isanzwe ari 20% ~ 30%.
* Kwihanganira: Utumashini dukoresha amashanyarazi ya monolithic dukunze kugira ubushobozi bwo kwihanganira ± 20% cyangwa ± 30% (urugero, amanota ya M cyangwa N), kandi umupaka ugomba kugabanywa mu gihe cyo kubara.
3. Ibipimo by'umuvuduko w'amashanyarazi: "Umuvuduko w'amashanyarazi" wombi ugomba kwitabwaho
Iki ni cyo gice gikunze kwibasirwa n'amakosa menshi! Urupapuro rw'amakuru rwa inductors zikozwe mu buryo buhuriweho rugaragaza imiyoboro ibiri itandukanye, kandi ibyo byombi bigomba kubahirizwa icyarimwe:
* Umuvuduko w'amazi (I_{sat}): Umupaka ukomeye
* Ibisobanuro: Umuyoboro w'amazi iyo inductance igabanutse ku gipimo runaka (ubusanzwe 10% kugeza 30% by'agaciro k'ibanze).
*Uburyo bwo guhitamo: I_{sat} igomba kuba nini kuruta umuvuduko w'amazi (I_{peak}) mu muyoboro.
*Ibarura ry'umuvuduko w'amashanyarazi: I_{peak} = I_{out} + ΔI_L/2 (ni ukuvuga umuvuduko w'amashanyarazi usohoka hamwe n'igice cy'umuvuduko w'amashanyarazi).
*Ingaruka: Iyo I_sat idahagije, inductor izahita yuzura mu buryo bwa rukuruzi, bigatera igabanuka rikomeye ry'ingufu z'amashanyarazi bigatuma ingufu z'amashanyarazi zizamuka cyane, bishobora gutwika transistor ihindura amashanyarazi.
Umuvuduko w'ubushyuhe (I2 {rms}): igipimo cy'ubushyuhe
*Ibisobanuro: Ingano y'umuzi w'amashanyarazi kare aho ubushyuhe bw'ubuso bw'inductor bwiyongeraho agaciro kagenwe (ubusanzwe 40 ° C).
*Uko wahitamo: I2 {rms} igomba kuba iruta umuvuduko ntarengwa w'amashanyarazi (I2 {out}) muri serivise.
*Ingaruka: Niba I2 {rms} idahagije, inductor izashyuha cyane, ibyo bikaba bigabanya imikorere myiza gusa ahubwo bishobora no kwangiza imiyoboro ya PCB.
4. Itondere uburyo DC idakora neza (DCR) n'uburyo ikora neza
DCR (Direct Current Resistance) ni ukurwanya kwa coil ya inductor ubwayo.
*Ingaruka: DCR ishobora gutera igihombo cy'umuringa (P_ {igihombo}=I ^ 2 XR), gihinduka ubushyuhe mu buryo butaziguye kandi kikagabanya ubushobozi bw'ingufu.
*Ingano: Iyo ingano n'igiciro byemeye, DCR ntoya iba nziza kurushaho.
5. Tekereza inshuro zigaragara ku giti cyawe
Ihinduka ry’amashanyarazi riterwa n’amashanyarazi ribaho iyo umuriro unyura mu muyoboro w’amashanyarazi ubwawo uhindutse. Iyo insinga y’icyuma ikoreshejwe mu gukora coil n’umuriro unyura muri coil ugahinduka, hazabaho ikintu gikomeye giterwa n’amashanyarazi. Imbaraga za coil zikora zisubira inyuma zibangamira ihinduka ry’umuriro kandi zikagira uruhare mu gutuma umuriro uhoraho. By’umwihariko, iyo inductor iri mu mimerere aho nta muyaga unyuramo, izagerageza kubuza umuriro kunyuramo iyo circuit ifunguye; Iyo inductor iri mu mimerere aho umuriro unyuramo, izagerageza kugumana umuyaga uhoraho iyo circuit ivanywemo.
Igihe cyo kohereza: Mutarama-21-2026