text.skipToContent text.skipToNavigation
Internet Explorer is not a supported browser for TI.com. For the best experience, please use a different browser.


3-, 4-Cell Lithium-Ion Protection IC for Use With BQ2083/5

Out of stock


Qty Price (USD)
1-99 5.529
100-249 4.844
250-999 3.397
1,000+ 2.737

Quality information

RoHS Yes
Lead finish / Ball material NIPDAU
MSL rating / Peak reflow Level-1-260C-UNLIM
Quality, reliability
& packaging information info-circle

Information included:

  • RoHS
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
View or download

Export classification

*For reference only

  • US ECCN: EAR99

Packaging information

Package | Pins TSSOP (PW) | 24
Package qty | Carrier: 60 | TUBE
Operating temperature range (°C) -25 to 85
View TI packaging information

Features for the BQ29311

  • 3- or 4-Cell Series Protection Control
  • Autonomous Overcurrent and Short Circuit Protection
  • Provides Individual Cell Voltages to Battery Management Host
  • Integrated Cell Balancing Control
  • I2C Compatible User Interface Allows Access to Battery Information
  • User Control to Initiate Protection
  • Integrated 3.3-V 25-mA LDO
  • Programmable Shutdown and Brownout Control
  • Provides Drive for Three External FETs
  • Low Supply Current of 140 µA Typical
  • Programmable Threshold and Delay for Short Circuit Current Protection
  • Provides Drive for Three External FETs
  • Can Directly Interface With bq2083/5 for Complete Battery Management Solution
    • Notebook computer battery packs
    • Test equipment

Description for the BQ29311

The bq29311 is a three- or four-cell lithium-ion battery pack protection analog front end (AFE) IC that incorporates a 3.3-V 25-mA low-dropout regulator (LDO) and an I2C compatible interface to extract battery parameters such as cell voltages and control output status. Other parameters, such as overcurrent protection threshold and delay, can also be programmed into the bq29311 to increase the flexibility of the battery management system.

The bq29311 provides safety protection in overcurrent, short circuit, overvoltage, and undervoltage conditions via control from the battery management host. In overcurrent and short-circuit conditions the bq29311 can activate the FET drive as a secondary protection level. The communications interface allows the host to control and observe the current status of the protection, to set overcurrent levels for charge and discharge, to set the overcurrent blanking delay time, short-circuit threshold levels, and short-circuit blanking delay time, and to program for the VREG shutdown voltage and brownout-detection thresholds.

Each cell is balanced by a discharge path, which is enabled by the internal control registers accessible through the I2C compatible interface. The maximum current is set by an external series resistor with an absolute maximum value of 10 mA discharge current per cell.

Out of stock


Qty Price (USD)
1-99 5.529
100-249 4.844
250-999 3.397
1,000+ 2.737

Carrier options

You can choose different carrier options based on the quantity of parts, including full reel, custom reel, cut tape, tube or tray.

custom reel is a continuous length of cut tape from one reel to maintain lot- and date-code traceability, built to the exact quantity requested. Following industry standards, a brass shim connects an 18-inch leader and trailer on both sides of the cut tape for direct feeding into automated assembly machines. TI includes a reeling fee for custom reel orders.

Cut tape is a length of tape cut from a reel. TI may fulfill orders using multiple strips of cut tapes or boxes to satisfy the quantity requested.

TI often ships  tube or tray  devices inside a box or in the tube or tray, depending on inventory availability. We pack all tapes, tubes or sample boxes according to internal electrostatic discharge and moisture-sensitivity-level protection requirements.

Learn more

Lot and date code selection may be available

Add a quantity to your cart and begin the checkout process to view the options available to select lot or date codes from existing inventory.

Learn more