Cov khoom siv:
| HOM | piav qhia |
| qeb | Integrated Circuit Court (IC) PMIC - Voltage Regulators - DC DC Hloov Regulators |
| neeg tsim khoom | Texas Instruments |
| series | - |
| Pob | Daim kab xev thiab Reel (TR)Shear Band (CT)Digi-Reel® Custom Reel |
| khoom raws li txoj cai | hauv Tshuag |
| Muaj nuj nqi | Buck |
| tso zis configuration | xwb |
| topology | Buck |
| tso zis hom | kho tau |
| Tus naj npawb ntawm cov zis | 3 |
| Voltage - Cov tswv yim (Min) | 4.5v ua |
| Voltage - Input (Max) | 18 V ib |
| Voltage - Cov zis (min / tsau) | 0,8v ua |
| Voltage - Output (siab tshaj) | 18 V ib |
| Tam sim no - Tso zis | 3a,2 ua |
| Zaus - hloov | 300 kHz ~ 2.2 MHz |
| Synchronous Rectifier | Yog lawm |
| Ua haujlwm kub | -40 ° C ~ 125 ° C (TJ) |
| hom kev teeb tsa | Nto Mount Hom |
| Package / Enclosure | 40-VFQFN nthuav tawm Pad |
| Cov khoom siv ntim khoom | 40-VQFN (6x6) |
| Yam khoom naj npawb | TSO 65251 |
Environment thiab Export Classification:
| TXOJ CAI | piav qhia |
| RoHS xwm txheej | Ua raws li ROHS3 specification |
| Moisture Sensitivity Level (MSL) | 3 (168 teev) |
| REACH xwm txheej | Cov khoom uas tsis yog REACH |
| ECCN | UA 99 |
| HTSUS | 8542.39.0001 |
TPS65251 4.5-V rau 18-V Input, High-Tam sim no, Synchronous kauj ruam-down Peb phaw
Switcher Nrog Integrated FET
1
1 Nta
1
•
Cov tswv yim dav dav siv hluav taws xob ntau (4.5 txog 18V)
•
0.8 V, 1% Kev Siv Tau Zoo
•
Nruam Loading: 3 A (Buck 1),
2 A (Buck 2 thiab 3)
•
Qhov siab tshaj tam sim no: 3.5A (Buck 1),
2.5A (Buck 2 thiab 3)
•
Adjustable Switching zaus
300 kHz rau 2.2 MHz Teeb los ntawm Sab Nraud Resistor
•
Dedicated Enable rau Txhua Buck
•
Sab nraud Synchronization Pin rau Oscillator
•
Sab nraud Enable/Sequencing thiab Soft-Start Pins
•
Adjustable Current Limit Teem los ntawm Sab Nraud Resistor
•
Soft-Start Pins
•
Tam sim no-hom tswj nrog yooj yim them nyiaj
Circuit
•
Lub zog zoo
•
Optional Low-Power Hom Kev Ua Haujlwm rau Lub Teeb
Thauj khoom
•
VQFN Pob, 40-Pin 6 mm × 6 mm RHA
2 Daim ntawv thov
•
Teem lub thawv saum toj kawg nkaus
•
Blu-duab tshav DVD
•
DVR
•
DTV
•
Tsheb Audio/Video
•
Lub koob yees duab kev ruaj ntseg
3 Nqe lus piav qhia
TPS65251 nta peb synchronous dav
input ntau high efficiency phaw converters.Cov
converters yog tsim los ua kom yooj yim rau nws daim ntawv thov
thaum muab tus tsim qauv xaiv los optimize lawv
siv raws li lub hom phiaj daim ntawv thov.
Cov converters tuaj yeem ua haujlwm hauv 5-, 9-, 12- lossis 15-V
systems thiab muaj kev sib xyaw fais fab transistors.Cov
tso zis voltage tuaj yeem teeb tsa sab nraud siv lub resistor
faib rau txhua tus nqi ntawm 0.8 V thiab ze rau qhov
input mov.Txhua converter nta pab tus pin ntawd
tso cai rau ncua kev pib ua haujlwm rau cov laj thawj sib luag,
soft-start tus pin uas tso cai rau adjustable mos-pib lub sij hawm los ntawm
xaiv lub soft-start capacitor, thiab kev txwv tam sim no
(RLIMx) tus pin uas tso cai rau tus tsim qauv kho tam sim no
txwv los ntawm xaiv ib tug sab nraud resistor thiab optimize lub
kev xaiv ntawm inductor.Kev tswj hom tam sim no tso cai rau a
yooj yim RC them nyiaj.
Hloov zaus ntawm cov converters tuaj yeem yog
yuav tsum tau teem nrog ib tug sab nraud resistor txuas nrog ROSC
tus pin lossis tuaj yeem synchronized rau lub moos sab nraud
txuas nrog SYNC tus pin yog tias xav tau.Kev hloov
regulators yog tsim los ua haujlwm ntawm 300 kHz mus rau
2.2 MHz zaus.180 ° tawm ntawm theem ua haujlwm ntawm Buck
1 thiab Buck 2, 3 (Buck 2 thiab 3 khiav hauv theem)
minimizes lub input lim yuav tsum.
