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

Description

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.