• AFE monitoring features

• Pure digitalinterface

• Internal ADC measures cell voltage, die temperature, and externalthermistor

• A separate, internal ADC measures pack current (coulombcounter)

• Directly supports up to three thermistors(103AT)

• Hardware protection features

• Overcurrent in Discharge(OCD)

• Short Circuit in Discharge (SCD)

• Overvoltage(OV)

• Undervoltage (UV)

• Secondary protector faultdetection

• Additional features

• Integrated cell balancing FETs

• Charge, discharge low-side NCH FETdrivers

• Alert interrupt to host microcontroller

• 2.5-V or3.3-V output voltage regulator

• No EEPROM programmingnecessary

• High supply voltage absolute maximum (up to 108V)

• Simple I2C compatible interface (CRCoption)

• Random cell connection tolerant

All trademarks are the property of their respective owners.

The bq769x0 familyof robust analog front-end (AFE) devices serves as part of a complete pack monitoring andprotection solution for next-generation, high-power systems, such as light electric vehicles, powertools, and uninterruptible power supplies. The bq769x0 is designed with low power in mind: Sub-blocks within the IC maybe enabled or disabled to control the overall chip current consumption, and a SHIP mode provides asimple way to put the pack into an ultra-low power state.

The bq76920 device supports up to 5-seriescells or typical 18-V packs, the bq76930 handles up to 10-series cells or typical 36-V packs, andthe bq76940 works for up to 15-series cells or typical 48-V packs. Avariety of battery chemistries may be managed with these AFEs, including Lithium Ion, Lithium ironphosphate, and more. Through I2C, a host controller can use thebq769x0 to implement manybattery pack management functions, such as monitoring (cell voltages, pack current, packtemperatures), protection (controlling charge/discharge FETs), and balancing. Integrated A/Dconverters enable a purely digital readout of critical system parameters, with calibration handledin TI’s manufacturing process.