DS2788 - Maxim Integrated

DS2788 Stand-Alone Fuel-Gauge

The DS2788 measures voltage, temperature, and current, and estimates available capacity for rechargeable lithium-ion (Li+) and Li+ polymer batteries. Cell characteristics and application parameters used in the calculations are stored in on-chip EEPROM. The available capacity registers report a conservative estimate of the amount of charge that can be removed.

Features

♦ Five 30mA Open-Drain Drivers for Driving LED Fuel-Gauge Display ♦ Debounced Fuel-Gauge Display Enable ♦ Internal Voltage Measurement Gain Register for Trimming External Voltage-Divider ♦ Pin for Driving FETs to Enable Voltage-Divider Only During Voltage Measurement, Conserving Power ♦ 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 Coulom.