LTC1960 - Dual Battery Charger/ Selector with SPI Interface

A proprietary PowerPath architecture supports simultaneous charging or discharging of both batteries. Typical battery run times are extended by 10%, while charging times are reduced by up to 50%. The LTC1960 automatically switches between power sources in less than 10µs to prevent power interruption upon battery or wall adapter removal.

The synchronous buck battery charger delivers 95% efficiency with only 0.5V dropout voltage, and prevents audible noise in all operating modes. Patented* input current limiting with 5% accuracy charges batteries in the shortest possible time without overloading the wall adapter.

The LTC1960’s 5mm × 7mm 38-pin QFN and 36-pin narrow SSOP packages allow implementation of a complete SBS-compliant dual battery system while consuming minimum PCB area.

Features
  • Complete Dual-Battery Charger/Selector System
  • Serial SPI Interface Allows External µC Control and Monitoring
  • Simultaneous Dual-Battery Discharge Extends Run Time by Typically 10%
  • Simultaneous Dual-Battery Charging Reduces Charging Time by Up to 50%
  • Automatic PowerPathTM Switching in <10µs Prevents Power Interruption
  • Circuit Breaker Protects Against Overcurrent Faults
  • 5% Accurate Adapter Current Limit Maximizes Charging Rate
  • 95% Efficient Synchronous Buck Charger
  • Charger Has Low 0.5V Dropout Voltage
  • No Audible Noise Generation, Even with Ceramic Capacitors
  • 11-Bit VDAC Delivers 0.8% Voltage Accuracy
  • 10-Bit IDAC Delivers 5% Current Accuracy
  • VIN Up to 32V; VBATT Up to 28V
  • Available in 5mm × 7mm 38-Pin QFN and 36-Pin Narrow SSOP Packages
Typical Application

Applications
  • Portable Computers
  • Portable Instruments
Packaging

Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC1960CG#PBFSSOP-36C$8.22$6.95
LTC1960CG#TRPBFSSOP-36C$7.05
LTC1960CUHF#PBF5x7 QFN-38C$7.97$6.70
LTC1960CUHF#TRPBF5x7 QFN-38C$6.76
Demo Boards
Part NumberDescriptionPrice
DC1904ALTC1960CD Demo Board I Universal Dual-Battery Charger/Selector$325.00
Companion Boards
Part NumberDescriptionPrice
DC1223A-BUSB to SM-Bus/SPI Interface with Monitor$400.00
Datasheet
Design Note
Reliability Data
LT Journal
Related Product
LTC1960 - Dual Battery Charger/ Selector with SPI Interface
LTC1960 Package Drawing LTC1960
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R384 Reliability Data
Dec 2001 Monolithic Dual Battery Power Manager Increases Run Time and Decreases Charge Time
LTC1960 Footprints and Symbols