3-Ihuza Intambwe-Hasi Umuvuduko Uhindura Umuyoboro wuzuye IC LMR33630BQRNXRQ1

1.

Imikorere ya buck ihindura ni ukugabanya kwinjiza voltage no kuyihuza numutwaro.Topologiya yibanze ya buck ihindura igizwe ningenzi nyamukuru na diode ikoreshwa mugihe cyo kuruhuka.Iyo MOSFET ihujwe nuburinganire bwa diode ikomeza, byitwa guhuza amafaranga.Imikorere yiyi mpinduka yimikorere irarenze iy'ibihe byashize byahinduwe kubera guhuza ibisa na MOSFET yo hepfo na diott ya Schottky.Igishushanyo 1 kirerekana igishushanyo mbonera cya buck ihindura, niyo miterere ikunze gukoreshwa muri mudasobwa ya desktop na ikaye muri iki gihe.

2.

Uburyo bwibanze bwo kubara

Transistor ihindura Q1 na Q2 byombi N-umuyoboro MOSFETs.izi MOSFETs ebyiri zikunze kuvugwa nkuruhande rwo hejuru cyangwa uruhande rwo hasi rwohinduranya kandi MOSFET yo hepfo irahuzwa hamwe na diode ya Schottky.Izi MOSFETS ebyiri na diode bigize umuyoboro wingenzi wumuhinduzi.Igihombo muri ibi bice nacyo ni igice cyingenzi cyigihombo cyose.Ingano y'ibisohoka LC muyunguruzi irashobora kugenwa na ripple current na ripple voltage.Ukurikije PWM yihariye ikoreshwa muri buri kibazo, imiyoboro irwanya ibitekerezo R1 na R2 irashobora gutoranywa kandi ibikoresho bimwe bifite imikorere yo gushiraho logique yo gushiraho ibisohoka voltage.PWM igomba gutoranywa ukurikije urwego rwingufu nigikorwa cyo gukora kumurongo wifuzwa, bivuze ko iyo inshuro ziyongereye, hagomba kubaho ubushobozi buhagije bwo gutwara ibinyabiziga bya MOSFET, bigizwe numubare muto wibice bisabwa kubisanzwe bihuza buck ihindura.

Ibishushanyo mbonera bigomba kubanza kugenzura ibisabwa, ni ukuvuga V ibyinjijwe, V ibisohoka na I bisohoka kimwe nubushyuhe bwo gukora.Ibi bisabwa byibanze noneho bihuzwa nimbaraga zitembera, inshuro, nubunini bwumubiri byabonetse.

3.

Uruhare rwa buck-kuzamura topologiya

Buck-boost topologies ni ngirakamaro kuko iyinjizwa rya voltage rishobora kuba rito, rinini, cyangwa kimwe na voltage isohoka mugihe bisaba ingufu zisohoka zirenga 50 W. Kubushobozi bwo gusohora munsi ya 50 W, ihinduranya rimwe ryambere rya inductor (SEPIC) ) nuburyo buhendutse cyane kuko bukoresha ibice bike.

Impinduka-Buck ihindura ikora muburyo bwa buck mugihe iyinjizwa ryumubyigano rirenze gusohora voltage no muburyo bwo kongera imbaraga mugihe iyinjizwa ryumubyigano ari munsi yumuriro wa voltage.Iyo ihinduranya ikorera mukarere kogukwirakwiza aho iyinjizwa ryumubyigano riri mumashanyarazi asohoka, hari ibitekerezo bibiri byo guhangana nibi bihe: haba amafaranga no kuzamura ibyiciro bikora icyarimwe, cyangwa guhinduranya ibintu bisimburana hagati yamafaranga no kuzamura ibyiciro, buri kimwe gikora kimwe cya kabiri gisanzwe cyo guhinduranya inshuro.Igitekerezo cya kabiri kirashobora gutera urusaku-rw-urusaku rwibisohoka, mugihe ibyasohotse mumashanyarazi bishobora kuba bitarondoreka ugereranije namafaranga asanzwe cyangwa kuzamura ibikorwa, ariko uhindura azakora neza ugereranije nigitekerezo cya mbere.