bq2092

bq2092 Gas Gauge IC with SMBus-Like Interface Features ➤ Provides accurate measurement of available charge in NiCd, NiMH, and Li-Ion rechargeable batteries ➤ Supports SBData charge control commands for Li-Ion, NiMH, and NiCd chemistries ➤ Designed for battery pack integration - 120µA typical operating current - Small size enables implementations in as little as 3 4 square inch of PCB ➤ Two-wire SMBus-like interface ➤ Measurements compensated for current and temperature ➤ Programmable self-discharge and charge compensation ➤ 16-pin narrow SOIC General Description The bq2092 Gas Gauge IC With SMBus-Like Interface is intended for battery-pack or in-system installation to maintain an accurate record of available battery charge. The bq2092 directly supports capacity monitoring for NiCd, NiMH, and Li-Ion battery chemistries. The bq2092 uses the SMBus protocol that supports many of the Smart Battery Data (SBData) commands. The bq2092 also supports SBData charge control. Battery state-ofcharge, capacity remaining, remaining time and chemistry are available over the serial link. Battery-charge state can be directly indicated using a four-segment LED display to graphically depict battery full-toempty in 25% increments. The bq2092 estimates battery selfdischarge based on an internal timer and temperature sensor and user-programmable rate information stored in external EEPROM. The bq2092 also automatically recalibrates or “learns” battery capacity in the full course of ...