LTC1479 Datasheet | Linear Technology

LTC1479 Power Path 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 puters 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 puter’s plex 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. Power Path is a trademark of Linear Technology Corporation. s s s s s U APPLICATIONS s s s s s s plete Power Path Management for Two Batteries, DC Power Source, Charger and Backup patible with Li-Ion, Ni Cd, Ni MH 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 puter Power Management Portable Instruments Handheld Terminals Portable Medical Equipment Portable Industrial Control Equipment TYPICAL APPLICATION Dual Battery Power Path 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...