bq76920

BQ76920, BQ76930, BQ76940 SLUSBK2I – OCTOBER 2013 – REVISED MARCH 2022 BQ769x0 3-Series to 15-Series Cell Battery Monitor Family for Li-Ion and Phosphate Applications 1 Features AFE monitoring features – Pure digital interface – Internal ADC measures cell voltage, die temperature, and external thermistor – A separate, internal ADC measures pack current (coulomb counter) – 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 fault detection Additional features – Integrated cell balancing FETs – Charge, discharge low-side NCH FET drivers – Alert interrupt to host microcontroller – 2.5-V or 3.3-V output voltage regulator – No EEPROM programming necessary – High supply voltage absolute maximum (up to 108 V) – Simple I2C compatible interface (CRC option) – Random cell connection tolerant 2 Applications Light electric vehicles (LEV): eBikes, eScooters, pedelec, and pedal-assist bicycles Power tools and garden tools Battery backup units (BBUS), energy storage systems (ESS), and uninterruptible power supply (UPS) systems Other industrial battery packs (≥10S) 3 Description 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 suppl...