Te whiriwhiri i te inductor whakarewa tika (Molding Choke) mō te ara iahiko, kaua e aro noa ki tōna āhua, engari mā te arotahi ki tōna mahi hihiri me ngā herenga ā-tinana i roto i te ara iahiko.
Ko ngā inductors monolithic te nuinga o te wā e whakamahia ana i roto i ngā ara iahiko hiko (pērā i ngā kaitahuri DC-DC) hei mahi i te rokiroki pūngao, te tātari, me ngā mahi hurihuri kore. Hei āwhina i a koe ki te whiriwhiri i te kōwhiringa tino pai, ka wehewehea e mātou te tukanga kōwhiringa ki ngā mahi matua e rima e whai ake nei:
1. Whakatauhia ngā rahi ā-tinana me te takai (Hipanga 1: Ka uru?)
Koinei te paearu tātari taketake rawa atu. Ko ngā inductors monolithic he hanganga tapawhā rite ki te maramara paerewa.
* Ngā Here Ahu: Inehia ngā rohe rahi me te teitei o ngā papa kua rāhuitia i runga i te PCB. Ko ngā ahu noa ko te 3.0×3.0mm, 4.0×4.0mm, 5.0×5.0mm, me ētahi atu, me te teitei mai i te 1.0mm ki te 5.0mm.
* Hoahoa Pūnaha: Whakaūtia mēnā he pine paerewa "pūnaha-rua" he hoahoa pine "pūnaha-whā" rānei hei whakaiti i te irahiko.
* Kia mōhio: Ahakoa he rite te roa me te whānui, ko te teitei te mea e whakatau ana i te manawanui mana o te inductor. Kia tupato kei whiriwhiria e koe te mea he.
2. Tātaihia, ka whakataurite i te inductance (uara L)
Ko te inductance te mea e whakatau ana i te nui o te ngaru o te iahiko. Mēnā he nui rawa, he iti rawa rānei, ka pā ki te pai o te tuku hiko.
* Tirohia te pukapuka ā-maramara: Kei roto i ngā pepa raraunga o te nuinga o ngā ara iahiko whakauru whakahaere mana (IC) ngā tātai e taunakitia ana mō te tatau i ngā uara hiko hiko.
Ka taea te whakatau tata i te tātai whānui pēnei i te L={(V_{in}-V_{out})XV_{out}/{V_{in}Xf_{sw}XI_{out} XRippleRatio}}
* ko f_{sw} te auau whakawhiti, ā, ko te RippleRatio he 20%~30% te tikanga.
* Manawanui: Ko te manawanui o ngā inductors monolithic he ±20%, ±30% rānei (hei tauira, ngā tohu M, N rānei), ā, me waiho he tawhē i te wā o ngā tataunga.
3. Ngā tawhā iahiko matua: Me whai whakaaro ki ngā "iahiko" e rua
Koinei te wāhanga tino ngāwari ki te hapa! Ko te pepa raraunga mō ngā inductors whakarewa whakauru e tohu ana i ngā iahiko whakatauranga e rua, ā, me tutuki ngā tikanga e rua i te wā kotahi:
* Te aukume mātotoru (I_{sat}): Teihana mārō
* Whakamāramatanga: Te iahiko ina heke te hiko whakaawe ki tētahi ōwehenga (te tikanga 10% ki te 30% o te uara tīmatanga).
*Tikanga kōwhiringa: Me nui ake a I_{sat} i te iahiko tihi (I_{peak}) i roto i te ara iahiko.
*Tātaitanga o te au tihi: I_{peak} = I_{out} + ΔI_L/2 (arā, te au putanga me te haurua o te au riporipo).
*Ngā Huanga: Ki te kore e ranea te I_sat, ka whakakī tonu te inductor ki te aukume, ka heke tere te inductor, ka piki tere hoki te iahiko, ka pau pea te transistor whakawhiti.
Te pikinga o te pāmahana o te au (I2 {rms}): te taupū whakamahana
*Whakamāramatanga: Ko te iahiko tapawhā toharite pūtake e piki ake ai te pāmahana mata o te inductor mā te uara kua tohua (ko te tikanga he 40 ° C).
*Me pēhea te whiriwhiri: Me nui ake te I2 {rms} i te iahiko putanga mōrahi (I2 {puta}) i roto i te ara iahiko.
*Te mutunga: Ki te kore e ranea te I2 {rms}, ka wera rawa te inductor, ka whakaiti i te pai o te mahi engari ka kino pea hoki ngā hononga tūhono PCB.
4. Kia aro ki te ātete DC (DCR) me te whai huatanga
Ko te DCR (Ātete Iahiko Tika) te ātete o te pōkai inductor tonu.
*Pānga: Ka taea e te DCR te whakararu i te parahi (P_ {loss}=I ^ 2 XR), ka hurihia tika hei wera, ā, ka whakaiti i te whai huatanga o te mana.
*Taurite: Ki te taea e te rahi me te utu, he pai ake te DCR iti ake.
5. Whakaarohia te auau oro-ā-roto
Ko te āhuatanga whakapūngao hikohiko e puta ana ina huri te ia e rere ana i roto i te kaiārahi. Ina whakamahia he waea whakarewa hei hanga i tētahi koiri, ā, ka huri te ia e rere ana i roto i te koiri, ka puta he āhuatanga whakapūngao hikohiko nui. Ka ārai te kaha hikohiko whakamuri o te koiri i te huringa o te ia, ā, ka whai wāhi ki te whakaū i te ia. Ina koa, ki te mea kei roto te inductor i tētahi āhua kāore he ia e rere ana, ka ngana ki te aukati i te ia kei rere i roto i taua āhua ina tahurihia te ara iahiko; Ki te mea kei roto te inductor i tētahi āhua kei te haere te iahiko, ka ngana ki te pupuri i tētahi iahiko pumau ina momotu te ara iahiko.
Wā tuku: Hanuere-21-2026