TI Launches Single-chip Battery Management IC

Texas Instruments Inc.’s (TI) BQ77910 battery management and protection device can manage four- to 10-cell Li-ion and lithium iron phosphate battery packs. In addition, two BQ77910 devices can be stacked to protect 11- to 20-cell packs. The low-power BQ77910 has a quiescent current of 50µA typical (2.5µA in shutdown mode), minimizing battery discharge during storage or idle periods to optimize battery life.

The BQ77910 protects the battery pack by monitoring individual cell voltages and drives two N-channel power MOSFETs to interrupt current flow during fault conditions. Fault detection and recovery criteria for the device are fully programmable in non-volatile memory to suit all types of lithium battery systems. Its programmable (EEPROM) fault detection thresholds and time delays make the device adaptable to all variations of lithium systems, including LiCoO2 and LiFePO4.


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The device simplifies battery pack designs for e-bikes, e-scooters, portable gardening tools, power tools and uninterruptible power supplies (UPS) and can also be used when replacing lead acid batteries.