1-Cell or 2-Cell Standalone Fuel Gauge
DS2781 1-Cell or 2-Cell Stand-Alone
Fuel Gauge IC
GENERAL DESCRIPTION
The DS2781 measures voltage, temperature, and cur...
Description
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...
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