Datasheet Texas Instruments BQ76940

Manufacturer	Texas Instruments
Series	BQ76940

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Status

Packaging

Parametrics

Parameters / Models	BQ7694000DBT	BQ7694000DBTR	BQ7694001DBT	BQ7694001DBTR	BQ7694002DBT	BQ7694002DBTR	BQ7694003DBT	BQ7694003DBTR	BQ7694006DBT	BQ7694006DBTR
Communication Interface	I2C	I2C	I2C	I2C	I2C	I2C	I2C	I2C	I2C	I2C
Function	Monitoring (Analog Front-End)	Monitoring (Analog Front-End)	Monitoring (Analog Front-End)	Monitoring (Analog Front-End)	Monitoring (Analog Front-End)	Monitoring (Analog Front-End)	Monitoring (Analog Front-End)	Monitoring (Analog Front-End)	Monitoring (Analog Front-End)	Monitoring (Analog Front-End)
Number of Series Cells, Max	9	9	9	9	9	9	9	9	9	9
Package Group	TSSOP	TSSOP	TSSOP	TSSOP	TSSOP	TSSOP	TSSOP	TSSOP	TSSOP	TSSOP
Protection Feature, s	Over-current in Discharge (OCD),Over-voltage (OV),Short-circuit Discharge (SCD),Under-voltage (UV)	Over-current in Discharge (OCD),Over-voltage (OV),Short-circuit Discharge (SCD),Under-voltage (UV)	Over-current in Discharge (OCD),Over-voltage (OV),Short-circuit Discharge (SCD),Under-voltage (UV)	Over-current in Discharge (OCD),Over-voltage (OV),Short-circuit Discharge (SCD),Under-voltage (UV)	Over-current in Discharge (OCD),Over-voltage (OV),Short-circuit Discharge (SCD),Under-voltage (UV)	Over-current in Discharge (OCD),Over-voltage (OV),Short-circuit Discharge (SCD),Under-voltage (UV)	Over-current in Discharge (OCD),Over-voltage (OV),Short-circuit Discharge (SCD),Under-voltage (UV)	Over-current in Discharge (OCD),Over-voltage (OV),Short-circuit Discharge (SCD),Under-voltage (UV)	Over-current in Discharge (OCD),Over-voltage (OV),Short-circuit Discharge (SCD),Under-voltage (UV)	Over-current in Discharge (OCD),Over-voltage (OV),Short-circuit Discharge (SCD),Under-voltage (UV)
Rating	Catalog	Catalog	Catalog	Catalog	Catalog	Catalog	Catalog	Catalog	Catalog	Catalog
Special Features	Cell Balancing,Coulomb counter (integrating current sense),Integrated ADC,LDO,Low-Side NCH CHG/DSG FET Drive,Requires separate MCU,Temperature sense	Cell Balancing,Coulomb counter (integrating current sense),Integrated ADC,LDO,Low-Side NCH CHG/DSG FET Drive,Requires separate MCU,Temperature sense	Cell Balancing,Coulomb counter (integrating current sense),Integrated ADC,LDO,Low-Side NCH CHG/DSG FET Drive,Requires separate MCU,Temperature sense	Cell Balancing,Coulomb counter (integrating current sense),Integrated ADC,LDO,Low-Side NCH CHG/DSG FET Drive,Requires separate MCU,Temperature sense	Cell Balancing,Coulomb counter (integrating current sense),Integrated ADC,LDO,Low-Side NCH CHG/DSG FET Drive,Requires separate MCU,Temperature sense	Cell Balancing,Coulomb counter (integrating current sense),Integrated ADC,LDO,Low-Side NCH CHG/DSG FET Drive,Requires separate MCU,Temperature sense	Cell Balancing,Coulomb counter (integrating current sense),Integrated ADC,LDO,Low-Side NCH CHG/DSG FET Drive,Requires separate MCU,Temperature sense	Cell Balancing,Coulomb counter (integrating current sense),Integrated ADC,LDO,Low-Side NCH CHG/DSG FET Drive,Requires separate MCU,Temperature sense	Cell Balancing,Coulomb counter (integrating current sense),Integrated ADC,LDO,Low-Side NCH CHG/DSG FET Drive,Requires separate MCU,Temperature sense	Cell Balancing,Coulomb counter (integrating current sense),Integrated ADC,LDO,Low-Side NCH CHG/DSG FET Drive,Requires separate MCU,Temperature sense
Typical Operating Current(Typ), uA	40	40	40	40	40	40	40	40	40	40
Vin(Max), V	75	75	75	75	75	75	75	75	75	75

Eco Plan

Application Notes

• Download
  bq769x0 Family Top 10 Design Considerations (Rev. A)
  PDF, 559 Kb, Revision: A, File published: May 2, 2016
• Download
  bq769x0 Pin Equivalent Diagrams
  PDF, 80 Kb, File published: Jan 5, 2015
  This application note contains diagrams of the pin equivalent circuits for each of the pins in the bq76920, bq76930, and bq76940 devices.
• Download
  I2C Communication Sample Code for the bq76940 with CRC Based on the MSP430 (Rev. B)
  PDF, 162 Kb, Revision: B, File published: May 14, 2014
  This application note describes how to communicate with the bq76940 family devices over I2C. The code is based on the TI MSP430G2553. The code shows how to write the CRC function which is used to verify the transaction integrity over the I2C and how to initialize the I2C engine of the G2553 and bq76940 registers as well as how to read binary data from the AFE registers and transfer the data to vol
• Download
  bq769x0 boot switch alternatives
  PDF, 141 Kb, File published: Dec 21, 2015
  The simplified system schematic in the bq769x0 data sheet shows a boot switch to wake the bq769x0 battery monitor. While this is a simple solution, in some cases this switch will not meet the needs of the system. This application report describes proposed circuit alternatives for the boot switch that may be considered for system design.
• Download
  bq769x0 BMS Configurations for Cordless Appliances
  PDF, 1.0 Mb, File published: Mar 23, 2017
• Download
  Fault Monitoring for High-Availability Systems using the bq769x0
  PDF, 937 Kb, File published: Feb 3, 2017
  The bq769x0 monitor family provides a complete solution of monitoring and protection for battery voltageand current related faults, but also protects the battery system by self-monitoring for internal hardwarefaults. There are high-availability applications, such as in a drone battery management system, where thisunexpected FET turn off is undesirable. In such applications, faults like XREAD
• Download
  Embedded Scheduler in Cell Battery Monitor of the bq769x0
  PDF, 172 Kb, File published: Aug 10, 2016

Model Line

Manufacturer's Classification

• Semiconductors> Power Management> Battery Management Products> Battery Monitor, Protection & Authentication Solutions