BQ2014H - Benchmarq

BQ2014H Low-Cost NiCd/NiMH Gas Gauge

The bq2014H NiCd/NiMH Gas Gauge IC is intended for batterypack or in-system installation to maintain an accurate record of available battery capacity. The IC monitors a voltage drop across a sense resistor connected in series between the negative battery terminal and ground to determine charge and discharge activity of the battery. Compensations for battery .

Features

➤ Accurate measurement of available capacity in NiCd or NiMH batteries ➤ Low-cost battery management so- lution for pack integration - As little as 1 2 square inch of PCB for complete circuit - Low operating current (120µA typical) - Less than 100nA of data retention current ➤ High-speed (5kb/s) single-wire communication interface (HDQ bus) for critical battery parameters ➤ Communication with an external charge controller such as the bq2004 ➤ Direct drive of remaining capacity LEDs ➤ Automatic rate and temperature compensation of measurements ➤ 16-pin narrow SOIC General D.