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BQ76940 Series

9 to 15-series cell li-ion and li-phosphate battery monitor (bq76940 family)

Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/

Catalog

9 to 15-series cell li-ion and li-phosphate battery monitor (bq76940 family)

PartSupplied ContentsContentsUtilized IC / PartFunctionTypeOperating Temperature [Max]Operating Temperature [Min]Fault ProtectionSupplier Device PackageMounting TypeInterfacePackage / CasePackage / Case [y]Package / Case [x]Battery ChemistryNumber of Cells [Max] [custom]Number of Cells [Min] [custom]
Texas Instruments
BQ76940EVM
Board(s), Cable(s)
Board(s), Cable(s)
BQ76940, BQ78350
Battery Charger
Power Management
Texas Instruments
BQ7694002DBT
Battery Monitor
85 °C
-40 °C
Over Current, Over/Under Voltage, Short Circuit
44-TSSOP
Surface Mount
I2C
44-TFSOP
4.4 mm
0.173 "
Multi-Chemistry
15
9
Texas Instruments
BQ7694006DBTR
Battery Monitor
85 °C
-40 °C
Over Current, Over/Under Voltage, Short Circuit
44-TSSOP
Surface Mount
I2C
44-TFSOP
4.4 mm
0.173 "
Multi-Chemistry
15
9
Texas Instruments
BQ7694002DBTR
Battery Monitor
85 °C
-40 °C
Over Current, Over/Under Voltage, Short Circuit
44-TSSOP
Surface Mount
I2C
44-TFSOP
4.4 mm
0.173 "
Multi-Chemistry
15
9
Texas Instruments
BQ7694003DBTR
Battery Monitor
85 °C
-40 °C
Over Current, Over/Under Voltage, Short Circuit
44-TSSOP
Surface Mount
I2C
44-TFSOP
4.4 mm
0.173 "
Multi-Chemistry
15
9
Texas Instruments
BQ7694001DBTR
Battery Monitor
85 °C
-40 °C
Over Current, Over/Under Voltage, Short Circuit
44-TSSOP
Surface Mount
I2C
44-TFSOP
4.4 mm
0.173 "
Multi-Chemistry
15
9
Texas Instruments
BQ7694000DBTR
Battery Monitor
85 °C
-40 °C
Over Current, Over/Under Voltage, Short Circuit
44-TSSOP
Surface Mount
I2C
44-TFSOP
4.4 mm
0.173 "
Multi-Chemistry
15
9
Texas Instruments
BQ7694006DBT
Battery Monitor
85 °C
-40 °C
Over Current, Over/Under Voltage, Short Circuit
44-TSSOP
Surface Mount
I2C
44-TFSOP
4.4 mm
0.173 "
Multi-Chemistry
15
9
Texas Instruments
BQ7694000DBT
Battery Monitor
85 °C
-40 °C
Over Current, Over/Under Voltage, Short Circuit
44-TSSOP
Surface Mount
I2C
44-TFSOP
4.4 mm
0.173 "
Multi-Chemistry
15
9
Texas Instruments
BQ7694001DBT
Battery Monitor
85 °C
-40 °C
Over Current, Over/Under Voltage, Short Circuit
44-TSSOP
Surface Mount
I2C
44-TFSOP
4.4 mm
0.173 "
Multi-Chemistry
15
9

Key Features

AFE monitoring featuresPure digital interfaceInternal ADC measures cell voltage, die temperature, and external thermistorA separate, internal ADC measures pack current (coulomb counter)Directly supports up to three thermistors (103AT)Hardware protection featuresOvercurrent in Discharge (OCD)Short Circuit in Discharge (SCD)Overvoltage (OV)Undervoltage (UV)Secondary protector fault detectionAdditional featuresIntegrated cell balancing FETsCharge, discharge low-side NCH FET driversAlert interrupt to host microcontroller2.5-V or 3.3-V output voltage regulatorNo EEPROM programming necessaryHigh supply voltage absolute maximum (up to 108 V)Simple I2C compatible interface (CRC option)Random cell connection tolerantAFE monitoring featuresPure digital interfaceInternal ADC measures cell voltage, die temperature, and external thermistorA separate, internal ADC measures pack current (coulomb counter)Directly supports up to three thermistors (103AT)Hardware protection featuresOvercurrent in Discharge (OCD)Short Circuit in Discharge (SCD)Overvoltage (OV)Undervoltage (UV)Secondary protector fault detectionAdditional featuresIntegrated cell balancing FETsCharge, discharge low-side NCH FET driversAlert interrupt to host microcontroller2.5-V or 3.3-V output voltage regulatorNo EEPROM programming necessaryHigh supply voltage absolute maximum (up to 108 V)Simple I2C compatible interface (CRC option)Random cell connection tolerant

Description

AI
The BQ769x0 family of robust analog front-end (AFE) devices serves as part of a complete pack monitoring and protection solution for next-generation, high-power systems, such as light electric vehicles, power tools, and uninterruptible power supplies. The BQ769x0 is designed with low power in mind: Sub-blocks within the IC may be enabled or disabled to control the overall chip current consumption, and a SHIP mode provides a simple way to put the pack into an ultra-low power state. The BQ76920 device supports up to 5-series cells or typical 18-V packs, the BQ76930 handles up to 10-series cells or typical 36-V packs, and the BQ76940 works for up to 15-series cells or typical 48-V packs. A variety of battery chemistries may be managed with these AFEs, including Li-ion, Li-iron phosphate, and more. Through I2C, a host controller can use the BQ769x0 to implement many battery pack management functions, such as monitoring (cell voltages, pack current, pack temperatures), protection (controlling charge/discharge FETs), and balancing. Integrated A/D converters enable a purely digital readout of critical system parameters, with calibration handled in TI’s manufacturing process. The BQ769x0 family of robust analog front-end (AFE) devices serves as part of a complete pack monitoring and protection solution for next-generation, high-power systems, such as light electric vehicles, power tools, and uninterruptible power supplies. The BQ769x0 is designed with low power in mind: Sub-blocks within the IC may be enabled or disabled to control the overall chip current consumption, and a SHIP mode provides a simple way to put the pack into an ultra-low power state. The BQ76920 device supports up to 5-series cells or typical 18-V packs, the BQ76930 handles up to 10-series cells or typical 36-V packs, and the BQ76940 works for up to 15-series cells or typical 48-V packs. A variety of battery chemistries may be managed with these AFEs, including Li-ion, Li-iron phosphate, and more. Through I2C, a host controller can use the BQ769x0 to implement many battery pack management functions, such as monitoring (cell voltages, pack current, pack temperatures), protection (controlling charge/discharge FETs), and balancing. Integrated A/D converters enable a purely digital readout of critical system parameters, with calibration handled in TI’s manufacturing process.