Likaroloana tsa LP87524BRNFRQ1 VQFN-HR26 Likaroloana tse Ncha tse Lekiloeng tse Kopanetsoeng tsa Circuit Chip IC LP87524BRNFRQ1
Litšobotsi tsa Sehlahisoa
| MOFUTA | TLHALOSO |
| Sehlopha | Lipotoloho tse Kopantsoeng (ICs) |
| Mfr | Lisebelisoa tsa Texas |
| Letoto | Likoloi, AEC-Q100 |
| Sephutheloana | Theipi le Reel (TR) Seha Tape (CT) Digi-Reel® |
| SPQ | 3000 T&R |
| Boemo ba Sehlahiswa | E sebetsa |
| Mosebetsi | Phahamisa |
| Tlhophiso ea Sephetho | E ntle |
| Topology | Buck |
| Mofuta oa Sephetho | E ka reroang |
| Palo ea Litholoana | 4 |
| Voltage - Kenyo (Mots) | 2.8V |
| Voltage - Kenyo (Boholo) | 5.5V |
| Voltage - Output (Min/Fixed) | 0.6V |
| Voltage - Output (Boholo) | 3.36V |
| Hajoale - Sephetho | 4A |
| Khafetsa - Ho fetoha | 4MHz |
| Synchronous Rectifier | Ee |
| Mocheso oa ho sebetsa | -40°C ~ 125°C (TA) |
| Mofuta oa ho Beha | Thaba e kaholimo, Lephako le metsi |
| Sephutheloana / Taba | 26-PowerVFQFN |
| Sephutheloana sa Sesebelisoa sa Bafani | 26-VQFN-HR (4.5x4) |
| Nomoro ea Sehlahisoa sa Motheo | LP87524 |
1.
Mosebetsi wa converter
Converter ke sesebelisoa se fetolang lets'oao ho ba lets'oao le leng.Letšoao ke mofuta kapa mojari oa tlhahisoleseling o teng, 'me lisebelisoa tsa othomathike le litsamaiso tsa taolo ea othomathike, lets'oao hangata le fetoloa lets'oao le leng le bapisoang le tekanyo e tloaelehileng kapa ea referense ho hokahanya mefuta e' meli ea lisebelisoa hammoho, kahoo converter hangata ke sehokelo sa mahareng lipakeng tsa lisebelisoa tse peli (kapa lisebelisoa).
2.
Mokhoa oa ho sebelisa li-converter tsa lichelete
Buck converter ke sesebelisoa sa motlakase, sehlopha sa sesebelisoa se nang le switch (hangata MOSFET) ho bulela potoloho le ho tima kapele, phetoho ena e potlakileng e hlahisa leqhubu la lisekoere, haeba potoloho ea mosebetsi oa switch e behiloe ho 50%, ke hore, switch e ho 50% ea nako, motlakase o tloaelehileng o tla ba 50% ea ho kenya letsoho.
Leqhubu la lisekoere le hloka ho lokisoa ho fana ka matla a bohlokoa mme hangata li-inductors le li-capacitor li sebelisoa letotong ho fihlela ts'ebetso ena.Motsoako ona o tsejoa e le LC low-pass filter, moo litšoaneleho tsa inductor li thellang hona joale le capacitor e hanyetsa liphetoho tsa tšohanyetso tsa motlakase.Phello e kopantsoeng e hlahisa tlhahiso ea motlakase e batlang e boreleli ka ripple e tlaase.Ka mohlala, haeba motlakase o kenang ke 10V 'me sesebelisoa se sebelisa potoloho ea mosebetsi oa 50%, motlakase o tsoang e tla ba 5V.
Karolo e 'ngoe e hlokahalang ea converter ea buck ke diode kapa switch e' ngoe e hokahantsoeng ka ho bapa le inductor.Sena ke ho lefella mosebetsi oa inductor, moo hona joale ho inductor e ke keng ea fetoloa hang-hang, ho sireletsa li-tubes tse fetohang ho senya ka ho feteletseng.
Buck converter e boetse e na le potoloho e eketsehileng ho netefatsa hore ho na le motlakase o tsitsitseng.Mofetoleli o sebelisa sekema sa taolo e koetsoeng e nang le maikutlo a fosahetseng ho lekola tlhahiso ea motlakase le ho fetola ka matla potoloho ea mosebetsi oa li-switches ho laola motlakase o tsoang.
3.
Lintlha tsa moralo bakeng sa li-converter tsa buck
li-converter tsa buck li sebetsa hantle haholo, 'me lisebelisoa tse ling li sebetsa hantle ho feta 95%.
li-converter tsa buck li na le litšenyehelo tse ngata ho feta li-linear regulator tse maemong a phahameng a matla, moo litšenyehelo tsa ho pholisa tsa molaoli oa linear li ka ba tlase ho theko ea ho sebelisa buck converter.
tlhahiso ea buck converter e na le lerata, ho bolelang hore tlhahiso ea linear regulator e tsitsitse ebile e loketse lits'ebetso tse hlokang lerata le tlase.
balaoli ba linear ba ka arabela ka potlako ho liphetoho tse kenang le tse hlahisoang ha li bapisoa le li-converter tsa buck.
