BQ2013H

Not Recommended For New Designs bq2013H Features ➤ Accurate measurement of available charge in rechargeable batteries ➤ Designed for electric assist bicycles and other applications ➤ Measures a wide dynamic current range ➤ Supports NiCd, NiMH or lead acid ➤ Designed for battery pack inte- gration - 120µA typical standby current (self-discharge estimation mode) - Small size enables imple- mentations in as little as 1 2 square inch of PCB ➤ Direct drive of LEDs for capacity display ➤ Automatic charge and selfdischarge compensation using in- ternal temperature sensor ➤ Simple single-wire serial communications port for subassembly testing ➤ 16-pin narrow SOIC Gas Gauge IC for PowerAssist Applications General Description The bq2013H Gas Gauge IC is intended for battery-pack installation to maintain an accurate record of a battery’s available charge. 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. The bq2013H is designed for high cpaacity battery packs used in high-discharge rate systems. Battery self-discharge is estimated based on an internal timer and temperature sensor. Compensations for battery temperature, rate of charge, and self-discharge are applied to the charge counter to provide available capacity information across a wide range of operating conditions. Initial battery capacity, self-discharge rate, display mode, a...