TEXAS INSTRUMENTS BQ76925PW

The BQ76925PW is a host-controlled Analog Front End IC for 3-, 4-, 5-, or 6-series cell Li-ion and Li-polymer batteries. It allows a host controller to monitor individual cell voltages, pack current and temperature easily. The Host may use this information to determine unsafe or faulty operating conditions such as overvoltage, under- voltage, over temperature, overcurrent, cell imbalance, state of charge and state of health conditions. Cell input voltages are level-shifted, multiplexed, scaled and output for measurement by a Host ADC. A dedicated pin provides a low-drift calibrated reference voltage to enable accurate measurements. The voltage across an external-sense resistor is amplified and output to a Host ADC for both charge and discharge current measurements. Two gain settings enable operation with a variety of sense resistor values over a wide range of pack currents.