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DS2788 - Stand-Alone Fuel-Gauge

Description

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.

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.

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Full PDF Text Transcription

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DS2788 19-4639; Rev 2; 5/09 Stand-Alone Fuel-Gauge IC with LED Display Drivers General Description 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 given the current temperature, discharge rate, stored charge, and application parameters. Capacity estimation is reported in mAh remaining and percentage of full. LED display drivers and a debounced input make display of the capacity information easy.
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