BQ2050SN-D119TRG4

Li-Ion Gas Gauge With 1-Wire DQ Interface And 5 LED Drivers 16-SOIC 0 to 70

General Description

The bq2050 Lithium Ion Power 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 todetermine charge and discharge activity of the battery. Compensations for battery temperature and rate of charge or discharge are applied to the charge, discharge, and self-discharge calculations to provide available capacity information across a wide range of operating conditions. Battery capacity is automatically recalibrated, or “learned,” in the course of a discharge cycle from full to empty.

Features

➤Conservative and repeatable measurement of available capacity in Lithium Ion rechargeable batteries

➤Designed for battery pack integration

  - 120µA typical operating current

  - Small size enables implementations in as little as 12 square inch of PCB

➤Integrate within a system or as a stand-alone device

  - Display capacity via singlewire serial communication port or direct drive of LEDs

➤Measurements compensated for current and temperature

➤Self-discharge compensation using internal temperature sensor

➤16-pin narrow SOIC