LTC4110EUHF#PBF

LTC4110 is a complete single chip, high efficiency, flyback battery charge and discharge manager with automatic switchover between the input supply and the backup battery or super capacitor. The IC provides four modes of operation: battery backup, battery charge, battery calibration 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 flyback 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 reconfigured 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. It is used in applications such as backup battery systems, server memory backup, medical equipment, high reliability systems etc.

• No heat battery calibration discharge using system load
• Automatic battery backup with input supply removal using PowerPath™ control
• Standalone for Li-ion/polymer, SLA, and supercaps
• Optional SMBus/I²C support allows battery capacity calibration operation with host
• Over- and under-battery voltage protection, adjustable battery float voltage
• Precision charge voltage is ±0.5%, PWM oscillator switching frequency is 300KHz typical
• Programmable charge/calibration current upto 3A with ±3% accuracy
• Wide backup battery supply range from 2.7V to 19V
• Wide input supply range from 4.5V to 19V
• Operating temperature range from -40°C to 85°C, package style is 38-lead plastic QFN

บันทึก

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