资 源 简 介
The LTC®4110 is a complete single chip, high effi ciency, fl 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 fl 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 reconfi 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.Multiple LTC4110s can be combined to form a redundant battery backup system or increase the number of battery packs to achieve longer backup run times.The LTC4110 is available in a low profi le (0.75mm), 38-pin 5mm × 7mm QFN package. The QFN features an exposed metal die mount pad for optimum thermal performance.
