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
|