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Date: 26th July 2011

Battery protection and cell-balancing IC for Li-Ion and lithium iron phosphate batteries

Texas Instruments Incorporated has introduced bq77910, the fully integrated battery protection and cell-balancing solution for Li-Ion and lithium iron phosphate battery packs. TI says it's the industries first such device. 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.

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 include:
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.

Available: Now
Package: 38-pin TSSOP package
Price: $2.70 each for 1K units

For more information visit: www.ti.com


 
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