Ncha ea Pele ea LM25118Q1MH/NOPB e Kopantsoeng Circuit IC REG CTRLR BUCK 20TSSOP Ic Chip LM25118Q1MH/NOPB
Litšobotsi tsa Sehlahisoa
MOFUTA | TLHALOSO |
Sehlopha | Lipotoloho tse Kopantsoeng (ICs) |
Mfr | Lisebelisoa tsa Texas |
Letoto | Likoloi, AEC-Q100 |
Sephutheloana | Tube |
SPQ | 73 Tu be |
Boemo ba Sehlahiswa | E sebetsa |
Mofuta oa Sephetho | Mokhanni oa Transistor |
Mosebetsi | Phahamisa, Tloha |
Tlhophiso ea Sephetho | E ntle |
Topology | Buck, Matlafatsa |
Palo ea Litholoana | 1 |
Mekhahlelo ea Sephetho | 1 |
Voltage - Phepelo (Vcc/Vdd) | 3V ~ 42V |
Khafetsa - Ho fetoha | Ho fihlela ho 500kHz |
Duty Cycle (Boholo) | 75% |
Synchronous Rectifier | No |
Sync oache | Ee |
Li-serial Interfaces | - |
Laola Likarolo | Noble, Frequency Control, Ramp, Soft Start |
Mocheso oa ho sebetsa | -40°C ~ 125°C (TJ) |
Mofuta oa ho Beha | Thaba e kaholimo |
Sephutheloana / Taba | 20-PowerTSSOP (0.173", 4.40mm Bophara) |
Sephutheloana sa Sesebelisoa sa Bafani | 20-HTSSOP |
Nomoro ea Sehlahisoa sa Motheo | LM25118 |
1. Synchronous bucking
Melemo.
Ts'ebetso e phahameng: khanyetso ea kahare ea mos tube e nyane haholo mme ho theoha ha voltage ea mmuso ho nyane haholo ho feta ho theoha ha motlakase oa Cosmos pele ho Schottky diode.
Mefokolo.
Botsitso bo sa lekaneng: tlhokahalo ea ho rala potoloho ea koloi, 'me u qobe tube e ka holimo le e ka tlaase ka nako e le' ngoe, potoloho e thata haholoanyane, e bakang botsitso bo sa lekaneng.
2. e seng synchronous buck
Melemo.
Ts'ebetso e tlase: Ho theoha ha motlakase oa Schottky diode ho hoholo, ha ho bapisoa le tšebeliso ea matla e hlahisoang ke mos tube
Mefokolo.
Botsitso bo phahameng: ho ke ke ha e-ba le ho tsamaisa ka nako e le 'ngoe ea li-tubes tse ka holimo le tse tlaase.
1: PFM (mokhoa oa ho feto-fetoha ha maqhubu)
Ho fetola bophara ba pulse ho tiile, ka ho fetola makhetlo a mangata a phallo ea pulse, motlakase o hlahisoang o tsitsitse.mofuta oa taolo o na le monyetla oa tšebeliso e tlase ea matla le ha e sebelisoa nako e telele, haholo-holo meroalo e menyane.
2: PWM (Pulse Width Modulation)
Mofuta oa taolo oa PWM o sebetsa hantle haholo 'me o na le ripple le lerata le tsoang hantle.
Ho akaretsa: Ka kakaretso, liphapang tsa ts'ebetso lipakeng tsa li-converter tsa DC-DC tse nang le mekhoa e 'meli e fapaneng ea modulation, PFM le PWM, li tjena.
Maqhubu a PWM, mokhoa oa khetho oa potoloho ea mosebetsi oa PFM.PWM/PFM phetolo ea mofuta oa taolo ea PFM ka mejaro e menyane le ho fetohela ho taolo ea PWM ka mejaro e boima.
3.
Phapano ke efe lipakeng tsa synchronous boost ICs le asynchronous boost ICs?
Phapang e kholo lipakeng tsa synchronous boost ICs le asynchronous boosts ke phapang ea mekhoa ea tokiso.
The synchronous boost IC circuit e sebelisa MOS hobane li-tubes tsa MOS li na le khanyetso e tlase haholo ea kahare sebakeng se bulehileng 'me litahlehelo ts'ebetsong ea tokiso li tlase haholo, ka hona ts'ebetso ea ho matlafatsa synchronous e phahame mme tlhahiso ea mocheso e tlase.E ka sebelisoa bakeng sa lisebelisoa tse matlafatsang matla a phahameng.
Li-circuits tsa Asynchronous boost IC li sebelisa diode bakeng sa tokiso.Li-diode li na le ho theoha ha matla a marang-rang nakong ea ho lokisa.Ha boemo ba hona joale bo phahame ts'ebetsong ea tokiso, ho ba le tahlehelo e phahameng.Hangata, matla a ke ke a ba matla a phahameng.