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LTC1479

Linear Technology
Part Number LTC1479
Manufacturer Linear Technology
Description PowerPath Controller for Dual Battery Systems
Published Mar 27, 2005
Detailed Description LTC1479 PowerPath Controller for Dual Battery Systems FEATURES s s DESCRIPTION The LTC ®1479 is the “heart” of a total ...
Datasheet PDF File LTC1479 PDF File

LTC1479
LTC1479

Overview
LTC1479 PowerPath Controller for Dual Battery Systems FEATURES s s DESCRIPTION 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 directly to the LT1510, LT1511 and LT1620/LTC1435 battery 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 U APPLICATIONS 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 “3-Diode” Mode Ensures Powers is Available under “Cold Start” Conditions All N-Channel Switching Reduces Power Losses Capacitor and Battery Inrush Current Limited “Seamless” Switching Between Power Sources Independent Charging and Monitoring of Two Battery Packs New, Small Footprint, 36-Lead SSOP Package Notebook Computer Power Management Portable Instruments Handheld Terminals Portable Medical Equipment Portable Industrial Control Equipment TYPICAL APPLICATION Dual Battery PowerPathTM 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 MANAGEM...


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