Battery Management IC BQ7693003DBTR 3.3 V 40 UA Li-Phosphate Battery Moniter

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)

Specifications

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 supplies. The BQ769x0 is designed with low power in mind: Subblocks 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.

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

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