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LTC1479IG Datasheet

  • LTC1479IG

  • PowerPath Controller for Dual Battery Systems

  • 24頁(yè)

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LTC1479
PowerPath Controller
for Dual Battery Systems
FEATURES
s
s
DESCRIPTION
The LTC
廬
1479 is the 鈥渉eart鈥?of a total power management
solution for single and dual battery notebook computers
and other portable equipment. The LTC1479 directs power
from up to two battery packs and a DC power source to the
input of the main system switching regulator. It works in
concert with related LTC power management products
(e.g. LTC1435, LT
廬
1511, etc.) to create a total system
solution; starting from the batteries and the DC power
source, and ending at the input of each of the computer鈥檚
complex loads. A system-provided power management
碌P
monitors and actively directs the LTC1479.
The LTC1479 uses low loss N-channel MOSFET switches
to direct power from three main sources. An adaptive
current limiting scheme reduces capacitor and battery
inrush current by controlling the gates of the MOSFET
switches during transitions. The LTC1479 interfaces di-
rectly to the LT1510, LT1511 and LT1620/LTC1435 bat-
tery charging circuits.
, LTC and LT are registered trademarks of Linear Technology Corporation.
PowerPath is a trademark of Linear Technology Corporation.
s
s
s
s
s
s
Complete Power Path Management for Two
Batteries, DC Power Source, Charger and Backup
Compatible with Li-Ion, NiCd, NiMH and Lead-Acid
Battery Chemistries
鈥?-Diode鈥?Mode Ensures Powers is Available
under 鈥淐old Start鈥?Conditions
All N-Channel Switching Reduces Power Losses
Capacitor and Battery Inrush Current Limited
鈥淪eamless鈥?Switching Between Power Sources
Independent Charging and Monitoring of Two
Battery Packs
New, Small Footprint, 36-Lead SSOP Package
APPLICATIONS
s
s
s
s
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Notebook Computer Power Management
Portable Instruments
Handheld Terminals
Portable Medical Equipment
Portable Industrial Control Equipment
TYPICAL APPLICATION
Dual Battery PowerPath
TM
Controller System Block Diagram
DCIN
SW A/B
SW C/D
SW E/F
SW G
BAT2
BATTERY CHARGER
(LT1510/LT1511/
LT1620/LTC1435)
BACKUP
REGULATOR
(LT1304)
POWER
MANAGEMENT
碌P
SW H
HIGH EFFICIENCY
DC/DC SWITCHING
REGULATOR
(LTC1435/LTC1438
ETC.)
AC
ADAPTER
R
SENSE
BAT1
LTC1479
PowerPath CONTROLLER
STATUS &
CONTROL
U
U
U
+
C
IN
5V
1479 TA01
1

LTC1479IG 產(chǎn)品屬性

  • LTC1479

  • 37

  • 集成電路 (IC)

  • PMIC - 電池管理

  • -

  • 雙電池控制器

  • 鉛酸，鋰離子，鎳鎘，鎳氫

  • 6 V ~ 28 V

  • -40°C ~ 85°C

  • 表面貼裝

  • 36-SSOP（0.209"，5.30mm 寬）

  • 36-SSOP

  • 管件

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