6 to 10-Series Cell Li-Ion and Li-Phosphate Battery Monitor (bq76940 Family) | DBT | 30 | -40 to 85

The BQ769x0

family of robust analog front-end (AFE) devices serves as part of a complete pack

monitoring and protection solution for next-generation, high-power systems, such as

light electric vehicles, power tools, and uninterruptible power supplies. The BQ769x0 is designed with low power in mind: Sub-blocks within the IC may

be enabled or disabled to control the overall chip current consumption, and a SHIP

mode provides a simple way to put the pack into an ultra-low power state.

The

BQ76920 device supports up to 5-series cells or typical 18-V packs, the BQ76930

handles up to 10-series cells or typical 36-V packs, and the BQ76940 works for

up to 15-series cells or typical 48-V packs. A variety of battery chemistries may be managed with

these AFEs, including Li-ion, Li-iron phosphate, and more. Through I2C, a

host controller can use the BQ769x0 to implement many battery pack

management functions, such as monitoring (cell voltages, pack current, pack

temperatures), protection (controlling charge/discharge FETs), and balancing.

Integrated A/D converters enable a purely digital readout of critical system

parameters, with calibration handled in TI’s manufacturing process.