DS2781

DS2781 1-Cell or 2-Cell Stand-Alone Fuel Gauge IC GENERAL DESCRIPTION The DS2781 measures voltage, temperature, and current, and estimates available capacity for rechargeable Lithium-Ion and Lithium-Ion Polymer batteries. Cell stack 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 is reported in milliamp hours remaining and percentage of full. APPLICATIONS Digital Video Cameras Commercial Two-Way Radios Industrial PDAs and Handheld PC Data Terminals Portable GPS Navigation Systems SIMPLIFIED TYPICAL OPERATING CIRCUIT P+ DS2781 DQ DQ VDD PIO VIN OVD VB SNS VSS P- Protection Circuit ORDERING INFORMATION PART PIN-PACKAGE DS2781E+ 8 TSSOP DS2781E+T&R 8 TSSOP DS2781G+ 10 TDFN-EP* DS2781G+T&R 10 TDFN-EP* +Denotes a lead-free/RoHS-compliant package. T&R = Tape and reel. *EP = Exposed pad. 1-Wire is a registered trademark of Maxim Integrated Products, Inc. PIN CONFIGURATIONS TOP VIEW VB VSS VIN VDD TSSOP-8 PIO SNS OVD DQ VB VSS VSS VIN VDD PAD PIO SNS NC OVD DQ 3mm x 4mm TDFN-10 FEATURES Precision Voltage, Temperature, and Current Measurement System Operates in One-Cell or Two--Cell Applications Accurate, Temperature Stable Internal Timebase Absolute and Relative Capacity Estimated from Coul...