BQ29311 Series
3-, 4-Cell Lithium-Ion Protection IC for Use With BQ2083/5
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
3-, 4-Cell Lithium-Ion Protection IC for Use With BQ2083/5
| Part | Supplier Device Package | Fault Protection | Function | Number of Cells [Max] | Number of Cells [Min] | Interface | Package / Case [y] | Package / Case [y] | Package / Case | Operating Temperature [Min] | Operating Temperature [Max] | Mounting Type | Battery Chemistry |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ29311PW | 24-TSSOP | Over Current, Over/Under Voltage, Short Circuit | Battery Protection | 4 | 3 | I2C | 4.4 mm | 0.173 " | 24-TSSOP | -25 °C | 85 C | Surface Mount | Lithium Ion/Polymer |
Texas Instruments BQ29311PWRG4 | 24-TSSOP | Over Current, Over/Under Voltage, Short Circuit | Battery Protection | I2C | 4.4 mm | 0.173 " | 24-TSSOP | -25 °C | 85 C | Surface Mount | Lithium Ion/Polymer | ||
Texas Instruments BQ29311PWR | 24-TSSOP | Over Current, Over/Under Voltage, Short Circuit | Battery Protection | I2C | 4.4 mm | 0.173 " | 24-TSSOP | -25 °C | 85 C | Surface Mount | Lithium Ion/Polymer | ||
Texas Instruments BQ29311PWG4 | 24-TSSOP | Over Current, Over/Under Voltage, Short Circuit | Battery Protection | I2C | 4.4 mm | 0.173 " | 24-TSSOP | -25 °C | 85 C | Surface Mount | Lithium Ion/Polymer |
Key Features
• 3- or 4-Cell Series Protection ControlAutonomous Overcurrent and Short Circuit ProtectionProvides Individual Cell Voltages to Battery Management HostIntegrated Cell Balancing ControlI2C Compatible User Interface Allows Access to Battery InformationUser Control to Initiate ProtectionIntegrated 3.3-V 25-mA LDOProgrammable Shutdown and Brownout ControlProvides Drive for Three External FETsLow Supply Current of 140 µA TypicalProgrammable Threshold and Delay for Short Circuit Current ProtectionProvides Drive for Three External FETsCan Directly Interface With bq2083/5 for Complete Battery Management SolutionAPPLICATIONSNotebook computer battery packsTest equipment3- or 4-Cell Series Protection ControlAutonomous Overcurrent and Short Circuit ProtectionProvides Individual Cell Voltages to Battery Management HostIntegrated Cell Balancing ControlI2C Compatible User Interface Allows Access to Battery InformationUser Control to Initiate ProtectionIntegrated 3.3-V 25-mA LDOProgrammable Shutdown and Brownout ControlProvides Drive for Three External FETsLow Supply Current of 140 µA TypicalProgrammable Threshold and Delay for Short Circuit Current ProtectionProvides Drive for Three External FETsCan Directly Interface With bq2083/5 for Complete Battery Management SolutionAPPLICATIONSNotebook computer battery packsTest equipment
Description
AI
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.
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.