Battery Backup System Manager

The LTC4110 is a complete single chip, high efciency, yback battery charge and discharge manager with auto- matic switchover between the input supply and the backup battery or super capacitor. The IC provides four modes of operation: battery backup, battery charge, battery calibra- tion and shutdown. Battery backup and battery charge are Automatic standalone modes, while the optional calibration mode requires a CPU host to communicate over an SMBus During calibration the yback charger is used in reverse to discharge the battery with a programmable constant current into the system load eliminating heat generation. Three status outputs CAN be individually recon gured over the SMBus to become GPIOs. User programmable over- discharge protection is provided. The SHDN pin isolates the battery to support shipping the product with a charged battery installed. By Linear Technology Corporation