DESCRIPTION
The LTC®1760 Smart Battery System Manager is a highly integrated level 3 battery charger and selector intended for products using dual smart batteries. Three SMBus interfaces allow the LTC1760 to servo to the internal voltage and currents measured by the batteries while allowing an SMBus Host to monitor either battery’s status. Charging accuracy is determined by the battery’s internal voltage and current measurement, typically better than ±0.2%.

FEATURES
■ SMBus Charger/Selector for Two Smart Batteries*
■ Voltage and Current Accuracy within 0.2% of Value Reported by Battery
■ Simplifies Construction of “Smart Battery System Manager”
■ Includes All SMBus Charger V1.1 Safety Features
■ Supports Autonomous Operation without a Host
■ Allows Both Batteries to Discharge Simultaneously into Single Load with Low Loss (Ideal Diode)
■ SMBus Switching for Dual Batteries with Alarm Monitoring for Charging Battery at All Times
■ Pin Programmable Limits for Maximum Charge Current and Voltage Improve Safety
■ Fast Autonomous Power Path Switching (<10µs)
■ Low Loss Simultaneous Charging of Two Batteries
■ >95% Efficient Synchronous Buck Charger
■ AC Adapter Current Limiting* Maximizes Charge Rate
■ SMBus Accelerator Improves SMBus Timing**
■ Available in 48-Lead TSSOP Package

APPLICATIONS
■ Portable Computers and Instruments
■ Standalone Dual Smart Battery Chargers
■ Battery Backup Systems