BQ77910A Series
Standalone 4-10 Cell Precision Protector for Li-Ion Chemistries
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
Standalone 4-10 Cell Precision Protector for Li-Ion Chemistries
| Part | Package / Case | Package / Case | Package / Case | Battery Chemistry | Mounting Type | Interface | Fault Protection | Function | Operating Temperature [Min] | Operating Temperature [Max] | Number of Cells [Min] [custom] | Number of Cells [Max] [custom] | Supplier Device Package |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ77910ADBTR | 4.4 mm | 38-TFSOP | 0.173 in | Lithium Ion/Polymer | Surface Mount | I2C | Over Current, Over Temperature, Over/Under Voltage, Short Circuit | Multi-Function Controller | -25 °C | 85 C | 4 | 10 | 38-TSSOP |
Texas Instruments BQ77910ADBT | 4.4 mm | 38-TFSOP | 0.173 in | Lithium Ion/Polymer | Surface Mount | I2C | Over Current, Over Temperature, Over/Under Voltage, Short Circuit | Multi-Function Controller | -25 °C | 85 C | 4 | 10 | 38-TSSOP |
Key Features
• 4-, 5-, 6-, 7-, 8-, 9-, or 10-Series Cell ProtectionIndividual Cell-Voltage MonitoringLow-Side NMOS FET Drive for Charge and Discharge ControlCompatible With 1-mΩ Current-Sense ResistorSupply-Voltage Range From 5.6 V to 50 VIntegrated 3.3-V Micro-Power LDO RegulatorLow Supply CurrentNormal Mode: 50 µA, TypicalShutdown Mode, LDO OFF: 3 µA, Typical38-Pin TSSOP PackageInternal 50-mA Automatic Cell Balancing4-, 5-, 6-, 7-, 8-, 9-, or 10-Series Cell ProtectionIndividual Cell-Voltage MonitoringLow-Side NMOS FET Drive for Charge and Discharge ControlCompatible With 1-mΩ Current-Sense ResistorSupply-Voltage Range From 5.6 V to 50 VIntegrated 3.3-V Micro-Power LDO RegulatorLow Supply CurrentNormal Mode: 50 µA, TypicalShutdown Mode, LDO OFF: 3 µA, Typical38-Pin TSSOP PackageInternal 50-mA Automatic Cell Balancing
Description
AI
The bq77910A is a battery protection and cell balancing device intended for Li-Ion and Li-Polymer battery packs.
The bq77910A monitors 4- to 10-series individual cell voltages and provides fast-acting outputs that may be used to drive N-channel MOSFETs to interrupt the power path. Activation delays and recovery methods for safety conditions are fully programmable in non-volatile memory.
Automatic cell balancing is provided using internal 50-mA cell circuits. A robust balancing algorithm ensures optimum performance by maintaining all cell voltages in balance. Balancing may be configured to operate at all times, only during charge, or can be disabled completely.
WARNING:The bq77910A-series integrated circuit helps system designers greatly enhance the safety of their Li-Ion and Li-Polymer battery packs when integrated effectively and in accordance with the instructions detailed in this document by technically qualified personnel familiar with battery pack application safety. This data sheet must be read in its entirety before working with the bq77910A.
Additional advanced safety features of the bq77910A include the ability to control split power-path MOSFETs, an open-cell sense-line detection mechanism, and the ability to detect an open or shorted external temperature sensor fault condition.
Programmable Protection Functions
Fixed Hardware Protection Functions
The bq77910A is a battery protection and cell balancing device intended for Li-Ion and Li-Polymer battery packs.
The bq77910A monitors 4- to 10-series individual cell voltages and provides fast-acting outputs that may be used to drive N-channel MOSFETs to interrupt the power path. Activation delays and recovery methods for safety conditions are fully programmable in non-volatile memory.
Automatic cell balancing is provided using internal 50-mA cell circuits. A robust balancing algorithm ensures optimum performance by maintaining all cell voltages in balance. Balancing may be configured to operate at all times, only during charge, or can be disabled completely.
WARNING:The bq77910A-series integrated circuit helps system designers greatly enhance the safety of their Li-Ion and Li-Polymer battery packs when integrated effectively and in accordance with the instructions detailed in this document by technically qualified personnel familiar with battery pack application safety. This data sheet must be read in its entirety before working with the bq77910A.
Additional advanced safety features of the bq77910A include the ability to control split power-path MOSFETs, an open-cell sense-line detection mechanism, and the ability to detect an open or shorted external temperature sensor fault condition.
Programmable Protection Functions
Fixed Hardware Protection Functions