LINEAR TECHNOLOGY DC2110A Synchronous Micropower Step Down Regulator
TLHALOSO
Pontšo potoloho 2110A ke monolithic step-down converter e nang le LT®8631. Boto ea demo e etselitsoe tlhahiso ea 5V ho tloha ho 6.5V ho isa ho 100V e kenang ho 400kHz switch-ing frequency. Mefuta e mengata ea ho kenya letsoho e etsa hore e tšoanelehe bakeng sa ho laola matla a tsoang mehloling e mengata e fapaneng, ho kenyeletsoa le likoloi, litsamaiso tsa indasteri le thepa ea thelevishene. LT8631 ke compact, high performance synchronous monolithic step-down switching regulator. Sesebelisoa sa motlakase, matšeliso le li-circuits tse ling tse hlokahalang li ka hare ho LT8631 ho fokotsa likarolo tsa kantle le ho nolofatsa moralo. Maqhubu a ho fetoha a LT8631 a ka hlophisoa ka sehanyetsi sa oscillator kapa oache ea kantle ho feta 100kHz ho isa ho 1MHz. Pin ea SYNC letlapeng la demo e thehiloe (JP1 sebakeng sa Burst Mode®) ka mokhoa o ikhethileng bakeng sa ts'ebetso e tlase ea Ripple Burst Mode. Ho amahanya oache ea kantle, isa JP1 ho SYNC 'me u sebelise oache ea kantle ho turret ea SYNC. Haeba ts'ebetso ea pulse-skipping e hlokahala, suthela JP1 sebakeng se tsitsitseng sa frequency. Setšoantšo sa 1 se bonts'a katleho ea potoloho ho kenyelletso ea 12V ho khetho ea Burst Mode. Boto ea demo e kentsoe sefahla sa EMI. EMI per-formance ea boto (e nang le EMI filter) e bontšoa ho Setšoantšo sa 2. Moeli o mofubelu ho Setšoantšo sa 2 ke CISPR25 Sehlopha sa 5 moeli oa tlhōrō. Setšoantšo se bontša hore potoloho e fetisa teko ka moeli o pharaletseng. Ho fihlela ts'ebetso ea EMI/EMC joalo ka ha ho bonts'itsoe
sefaele sa EMI sea hlokahala le phallo ea voltage lokela ho sebelisoa ho VEMI turret pin, eseng VIN. Lethathamo la lintlha tsa LT8631 le fana ka tlhaloso e felletseng ea karolo, ts'ebetso le tlhaiso-leseling ea ts'ebeliso. Leqephe la lintlha le tlameha ho baloa hammoho le bukana ena ea demo bakeng sa potoloho ea demo 2110A. LT8631 e bokelloa ka har'a liphutheloana tsa TSSOP tse etellang pele tse 20. Sebopeho se nepahetseng sa boto se bohlokoa bakeng sa ts'ebetso e phahameng ea mocheso le motlakase. Sheba likarolo tsa leqephe la data bakeng sa lintlha. Moralo files bakeng sa boto ena ea potoloho li fumaneha ho http://www.linear.com/demo/DC2110A
L, LT, LTC, LTM, Linear Technology, Burst Mode le Linear logo ke matšoao a ngolisitsoeng a Linear Technology Corporation. Matshwao a mang kaofela ke thepa ya beng ba ona.
TS'EBETSO TS'OANE
| LETŠOAO | PARAMETER | MAEMO | MIN TYP MAX | LIEKETSENG |
| VIN | Kenyelletso ea Phano | 6.5 100 | V | |
| TLHOKOMELO | Khumo Voltage | 4.88 5.04 5.2 | V | |
| fSW | Fetoha Frequency | RT = 25.5kΩ | 370 400 430 | kHz |
| IOUT | Max di neng di kwalwa Current | VIN = 12V | 1 | A |
| EFE | Ho sebetsa hantle ho DC | VIN = 12V, IOUT = 1A | 82.6 | % |
| VIN = 12V, IOUT = 0.4A | 89.5 | % |
TSELA E QALANG HO QALA
Pontšo ea potoloho ea 2110A e bonolo ho e hlophisa ho lekola ts'ebetso ea LT8631. Sheba setšoantšo sa 3 bakeng sa tlhophiso e nepahetseng ea lisebelisoa tsa ho lekanya 'me u latele mokhoa o ka tlase:
HLOKOMELA. Ha o metha phallo kapa phallo ya matlatage ripple, ho lokela ho nkoa ka hloko ho qoba sebaka se selelele sa pele ho probe ea oscilloscope. Lekanya phallo kapa phallo ya matlatage ripple ka ho thetsa ntlha ea probe ka kotloloho ho pholletsa le liteishene tsa VIN kapa VOUT le GND. Sheba setšoantšo sa 4 bakeng sa mokhoa o nepahetseng oa scope.
- Beha JP1 sebakeng sa GND.
- Ha motlakase o tima, hokela phepelo ea motlakase ho VEMI le GND. Haeba ts'ebetso ea EMI/EMC e se ea bohlokoa, filthara ea EMI e kentsoeng e ka fetisoa ka ho hokahanya phepelo ea motlakase ho VIN le GND.
- Ha motlakase o timme, hokela meroalo ho tloha ho VOUT ho ea ho GND.
- Bulela matla ha o kenya.
Etsa bonnete ba hore tlhahiso ea voltage ha e fete 100V. - Hlahloba sephetho se nepahetseng sa voltages (VOUT = 5V). HLOKOMELA. Haeba ho se na tlhahiso, khaola mojaro ka nakoana ho etsa bonnete ba hore mojaro ha oa beoa holimo haholo kapa o khutsufalitsoe.
- Hang sephetho se nepahetseng voltage thehiloe, lokisa mojaro ka har'a mekhahlelo ea ts'ebetso 'me u shebe tlhahiso ea molumotage regulation, ripple voltage, katleho le likarolo tse ling.
- Oache ea kantle e ka eketsoa ho terminal ea SYNC ha ts'ebetso ea SYNC e sebelisoa (JP1 ho SYNC posi-tion). Ka kopo etsa bonnete ba hore RT e khethiloeng e beha maqhubu a LT8631 ho 10% ka tlase ho maqhubu a tlase a SYNC. Sheba karolo ea Kamahanyo ea leqephe la data bakeng sa lintlha.
MAHLOMOLA LEROTHA
| 1 | 1 | C1 | CAP, 0.1µF, X7R, 10V, 10% 0402 | TDK, C1005X7R1A104K |
| 2 | 1 | C5 | CAP, 2.2µF, X5R, 10V, 10% 0402 | TDK, C1005X5R1A225K050BC |
| 3 | 1 | C6 | CAP, 4.7pF, C0G, 50V, 0.25pF 0603 | MURATA, GRM1885C1H4R7CA01D |
| 4 | 1 | C7 | CAP, 47µF, X7R, 10V, 20% 1210 | MURATA, GRM32ER71A476KE15L |
| 5 | 1 | C8 | CAP, 0.1µF, X7R, 10V, 10% 0603 | AVX, 0603ZC104KAT2A |
| 6 | 1 | C4 | CAP, 1µF, X7R, 10V, 10% 0603 | Setšoantšo sa CL10B105KP8NNNC |
| 7 | 1 | L1 | MOHLOMI, 22µH IHLP2525 | Tlhaloso: VISHAY, IHLP2525CZER220M11 |
| 8 | 1 | L2 | MOSEBETSI, 2.2µH | COILCRAFT, XFL4020-222MEB |
| 9 | 1 | R1 | RES, 51.1k, 1/10W, 1% 0603 | Setšoantšo sa CRCW060351K1FKEA |
| 10 | 2 | R2, R4 | RES, 1M, 1/10W, 1% 0603 | Setšoantšo sa CRCW06031M00FKEA |
| 11 | 1 | R3 | RES, 25.5k, 1/10W, 1% 0603 | Setšoantšo sa CRCW060325K5FKEA |
| 12 | 1 | R5 | RES, CHIP, 191k, 1/10W, 1% 0603 | VISHAY, CRCW0603191KFKEA |
| 13 | 1 | U1 | IC, BUCK REG FE-20(16) CB | LINEAR TECHNOLOGY, LT8631EFE#PBF |
Likarolo tse ling tsa Potoloho ea Boto ea Demo
| 1 | 1 | C2 | CAP, ALUM, 10µF, 100V | SUN ELECTRONIC, 100CE10BS |
| 2 | 0 | C11 (OPT) | CAP, 0603 | |
| 3 | 0 | D1 (OPT) | SCHOTTKY BARRIER REC, MATLA-DI-123 |
Hardware: Bakeng sa Boto ea Demo Feela
| 1 | 10 | E1 HO E10 | NTLHA YA TEKO, TURRET, 0.094″ MTG.HOLE | MILL-MAX, 2501-2-00-80-00-00-07-0 |
| 2 | 1 | JP1 | 4 PIN 0.079 MOHLOOHO O MOTHO O MONG | Setšoantšo sa SULLIN, NRPN041PAEN-RC |
| 3 | 1 | XJP1 | SHUNT, 0.079 ″ SERE | SAMTEC, 2SN-BK-G |
| 4 | 0 | R6 (OPT) | RES, 0603 | |
| 5 | 4 | MH1 HO YA MH4 | STAND-OFF, NYLON 0.50″ | KEYSTONE, 8833 (NAPA E BONAHALA) |
SETSEKI SEKEMO
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Aterese ea poso
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Litokomane / Lisebelisoa
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LINEAR TECHNOLOGY DC2110A Synchronous Micropower Step Down Regulator [pdf] Bukana ea Mosebelisi DC2110A Synchronous Micropower Step Down Regulator, DC2110A, DC2110A Micropower Step Down Regulator, Synchronous Micropower Step Down Regulator, Micropower Step Down Regulator, Micropower Regulator, Step Down Regulator, Regulator, LT8631 |
