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LTC1479 数据表(PDF) 1 Page - Linear Technology

部件名 LTC1479
功能描述  PowerPath Controller for Dual Battery Systems
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LTC1479 数据表(HTML) 1 Page - Linear Technology

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LTC1479
PowerPath Controller
for Dual Battery Systems
FEATURES
DESCRIPTION
s
Complete Power Path Management for Two
Batteries, DC Power Source, Charger and Backup
s
Compatible with Li-Ion, NiCd, NiMH and Lead-Acid
Battery Chemistries
s
“3-Diode” Mode Ensures Powers is Available
under “Cold Start” Conditions
s
All N-Channel Switching Reduces Power Losses
s
Capacitor and Battery Inrush Current Limited
s
“Seamless” Switching Between Power Sources
s
Independent Charging and Monitoring of Two
Battery Packs
s
New, Small Footprint, 36-Lead SSOP Package
The LTC
®1479 is the “heart” 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
®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’s
complex loads. A system-provided power management
µP 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.
TYPICAL APPLICATION
Dual Battery PowerPath
TM Controller System Block Diagram
PowerPath is a trademark of Linear Technology Corporation.
, LTC and LT are registered trademarks of Linear Technology Corporation.
s
Notebook Computer Power Management
s
Portable Instruments
s
Handheld Terminals
s
Portable Medical Equipment
s
Portable Industrial Control Equipment
APPLICATIONS
BAT1
BAT2
BATTERY CHARGER
(LT1510/LT1511/
LT1620/LTC1435)
SW A/B
RSENSE
SW C/D
SW E/F
SW G
SW H
+
CIN
DCIN
1479 TA01
5V
AC
ADAPTER
POWER
MANAGEMENT
µP
BACKUP
REGULATOR
(LT1304)
HIGH EFFICIENCY
DC/DC SWITCHING
REGULATOR
(LTC1435/LTC1438
ETC.)
LTC1479
PowerPath CONTROLLER
STATUS &
CONTROL


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