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07-20-2011

TI introduces industry's first single-chip battery management device for power tools and e-bike applications

Texas Instruments » bq77910

Highly integrated, standalone device provides complete pack protection and cell-balancing for 4- to 10-cell lithium battery packs

Texas Instruments Incorporated introduced the industry's first fully integrated battery protection and cell-balancing solution for Li-Ion and lithium iron phosphate battery packs. The bq77910 battery management and protection device can manage 4- to 10-cell battery packs, and two devices can be stacked to protect 11- to 20-cell packs. 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.

Texas Instruments: bq77910, Highly integrated, standalone device provides complete pack protection and cell-balancing for 4- to 10-cell lithium battery packs

 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.

Key features and benefits of the bq77910

  • Battery management and protection for 4- to 10-cell lithium batteries: Individual cell monitoring and balancing with internal FETs maximizes battery pack service life and performance.
  • Low power operation: Low quiescent current (50 uA typical, 2.5 uA in shutdown mode) minimizes battery discharge during storage or idle periods to optimize battery life.
  • Supports additional lithium battery chemistries: Programmable (EEPROM) fault detection thresholds and time delays make the bq77910 adaptable to all variations of lithium systems, including LiCoO2 and LiFePO4.
  • Standalone integrated solution does not require an external controller or processor.


Tools and support

TI offers a variety of tools and support to speed the implementation of the bq77910 family of devices:

  • bq77910EVM-001 evaluation module.
  • bq77908-10-GUI-SW evaluation software.

Texas Instruments BQ77910EVM-001

Availability and pricing

The bq77910 is available now in a 38-pin TSSOP package, priced at $2.70 in quantities of 1,000.

ti.com

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