3-A Synchronous Nhanho-Pazasi Voltage Shanduri Yakabatanidzwa dunhu IC LMR33630BQRNXRQ1
Product Attributes
| TYPE | DESCRIPTION |
| Category | Integrated Circuits (ICs) |
| Mfr | Texas Instruments |
| Series | Motokari, AEC-Q100 |
| Package | Tepi & Reel (TR) |
| SPQ | 3000 T&R |
| Product Status | Active |
| Basa | Nhanho-Pasi |
| Output Configuration | Positive |
| Topology | Buck |
| Output Type | Adjustable |
| Nhamba Yezvinobuda | 1 |
| Voltage - Input (Mini) | 3.8V |
| Voltage - Input (Max) | 36V |
| Voltage - Kubuda (Mini/Yakagadziriswa) | 1V |
| Voltage - Kubuda (Max) | 24V |
| Zvazvino - Output | 3A |
| Frequency - Kuchinja | 1.4MHz |
| Synchronous Rectifier | Ehe |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Mounting Type | Surface Mount, Wettable Flank |
| Package / Nyaya | 12-VFQFN |
| Supplier Device Package | 12-VQFN-HR (3x2) |
| Base Product Number | LMR33630 |
1.
Basa rekushandura buck nderokudzikisa magetsi ekuisa uye kuifananidza nemutoro.Iyo yakakosha topology ye buck converter ine main switch uye diode switch inoshandiswa panguva yekuzorora.Kana MOSFET yakabatana mukufambirana neinoenderera diode, inonzi synchronous buck converter.Kushanda kweiyi buck converter marongero akakwira kupfuura aya ekare mabheji ekushandura nekuda kwekubatana kwakafanana kweyakaderera-side MOSFET neiyo Schottky diode.Mufananidzo 1 unoratidza schematic yesynchronous buck converter, inova ndiyo inonyanya kurongeka inoshandiswa mudesktop uye notebook makomputa nhasi.
2.
Basic calculation method
Iyo transistor inochinja Q1 uye Q2 ese ari maviri N-chiteshi simba MOSFETs.aya maMOSFET maviri anowanzo kunzi akakwira-parutivi kana yakaderera-side switch uye yakaderera-side MOSFET yakabatana mukufambirana neSchottky diode.Aya maviri maMOSFET uye diode inoumba iyo huru chiteshi chemagetsi cheshanduko.Iko kurasikirwa muzvikamu izvi zvakare chikamu chakakosha chekurasikirwa kwese.Saizi yeinobuda LC sefa inogona kutariswa neiyo ripple ikozvino uye ripple voltage.Zvichienderana neiyo chaiyo PWM inoshandiswa mune yega yega, mhinduro resistor network R1 neR2 inogona kusarudzwa uye mamwe maturusi ane logic yekumisikidza basa rekuseta inobuda voltage.Iyo PWM inofanirwa kusarudzwa zvinoenderana nechiyero chesimba uye mashandiro ekushanda pane yaunoda frequency, izvo zvinoreva kuti kana frequency yawedzerwa, panofanirwa kuve nedhiraivha yakakwana yekutyaira magedhi eMOSFET, ayo anoumba huwandu hushoma hwezvinhu zvinodiwa. kune yakajairwa synchronous buck converter.
Mugadziri anofanira kutanga atarisa zvinodiwa, kureva V kupinza, V inobuda uye ini inobuda pamwe nezvinodiwa tembiricha yekushanda.Izvi zvakakosha zvinodiwa zvinozosanganiswa nekuyerera kwesimba, frequency, uye saizi yemuviri zvinodiwa izvo zvakawanikwa.
3.
Basa re buck-boost topology
Buck-boost topology inoshanda nekuti magetsi ekuisa anogona kuve madiki, akakurisa, kana akafanana neakabuda voltage asi ichida simba rekubuda rakakura kupfuura 50 W. Kune masimba ekubuda ari pasi pe50 W, iyo single-ended primary inductor converter (SEPIC) ) isarudzo inodhura zvakanyanya sezvo inoshandisa zvikamu zvishoma.
Buck-boost converters inoshanda mubuck modhi kana magetsi ekuisa ari makuru pane anobuda voltage uye ari muboost modhi kana magetsi ekuisa ari mashoma pane yakabuda voltage.Kana iyo inoshandura iri kushanda munzvimbo yekutapurirana uko magetsi ekuisa ari mune inobuda voltage renji, pane maviri mazano ekubata neaya mamiriro: ingave iyo buck uye nhanho yekusimudzira iri kushanda panguva imwe chete, kana machinjiro ekuchinja anochinjana pakati pebhaki. uye kusimudzira nhanho, imwe neimwe inowanzoshanda pahafu yenguva yakajairwa switching frequency.Yechipiri pfungwa inogona kuunza sub-harmonic ruzha pane inobuda, nepo kubuda kwemagetsi kurongeka kungave kushoma kana zvichienzaniswa neyakajairwa buck kana boost mashandiro, asi inoshandura ichave inoshanda zvakanyanya kana ichienzaniswa neyekutanga pfungwa.
