DS2780

www.DataSheet4U.com DS2780 Stand-Alone Fuel Gauge IC www.maxim-ic.com GENERAL DESCRIPTION The DS2780 measures voltage, temperature and current, and estimates available capacity for rechargeable Lithium Ion and Lithium Ion Polymer batteries. Cell characteristics and application parameters used in the calculations are stored in onchip EEPROM. The available capacity registers report a conservative estimate of the amount of charge that can be removed given the current temperature, discharge rate, stored charge and application parameters. Capacity estimation reported in mAh remaining and percentage of full. FEATURES § § § Precision Voltage, Temperature, and Current Measurement System Accurate, Temperature Stable Internal Time Base Absolute and Relative Capacity Estimated from Coulomb Count, Discharge Rate, Temperature and Battery Cell Characteristics Accurate Warning of Low Battery Conditions Automatic Backup of Coulomb Count and Age Estimation to Nonvolatile (NV) EEPROM Gain and Tempco Calibration Allows the Use of Low-Cost Sense Resistors 24-Byte Battery/Application Parameter EEPROM 16-Byte User EEPROM Unique ID and Multidrop 1-WireÒ Interface Tiny 8-pin TSSOP Package Embeds Easily in Battery Packs Using Thin Prismatic Cells § § § § § § § APPLICATIONS Digital Still Cameras Sub-Notebook Computers Handheld PC Data Terminals 3G Multimedia Wireless Handsets TYPICAL OPERATING CIRCUIT PK+ PIN CONFIGURATION TOP VIEW TSSOP-8 DS2780 500 1K 150 DQ PIO NC SNS 5.6V DATA 5 8 1 7 TS...