SLUSCG1 September   2018

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Simplified Schematic
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Supply Current
    6. 6.6  Digital Input and Output DC Characteristics
    7. 6.7  LDO Regulator, Wake-up, and Auto-Shutdown DC Characteristics
    8. 6.8  LDO Regulator, Wake-up, and Auto-Shutdown AC Characteristics
    9. 6.9  ADC (Temperature and Cell Measurement) Characteristics
    10. 6.10 Integrating ADC (Coulomb Counter) Characteristics
    11. 6.11 I2C-Compatible Interface Communication Timing
    12. 6.12 SHUTDOWN and WAKE-UP Timing
    13. 6.13 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Device Configuration
      2. 7.3.2  ALERT Interrupt and SHUTDOWN Wake-up
      3. 7.3.3  Voltage Measurement and Calibration
      4. 7.3.4  Temperature Measurement
      5. 7.3.5  Charging and Termination
      6. 7.3.6  Accumulated Charge Measurement
      7. 7.3.7  Gas Gauging
      8. 7.3.8  Battery Condition Warnings
      9. 7.3.9  Configuration Update
      10. 7.3.10 End-Of-Service Determination
      11. 7.3.11 Battery Level Threshold
      12. 7.3.12 Communications
        1. 7.3.12.1 I2C Interface
        2. 7.3.12.2 I2C Time Out
        3. 7.3.12.3 I2C Command Waiting Time
        4. 7.3.12.4 I2C Clock Stretching
      13. 7.3.13 Additional Data Memory Parameter Descriptions
    4. 7.4 Device Functional Modes
      1. 7.4.1 INITIALIZATION Mode
      2. 7.4.2 NORMAL Mode
      3. 7.4.3 SLEEP Mode
      4. 7.4.4 SHUTDOWN Mode
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Getting Started
    2. 8.2 Typical Applications
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 REGIN Voltage Sense Input
        2. 8.2.2.2 Integrated LDO Capacitor
        3. 8.2.2.3 Sense Resistor Selection
      3. 8.2.3 External Thermistor Support
      4. 8.2.4 Learning Load Enable (LEN) from Host
      5. 8.2.5 I2C
      6. 8.2.6 Temperature Sense
      7. 8.2.7 Application Curves
  9. 9 Power Supply Recommendation
    1. 9.1 Power Supply Decoupling
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Tools
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.3 Feature Description

Information is accessed through a series of commands called Standard Commands. The Extended Commands set provides additional capabilities. Both sets of commands, indicated by the general format Command(), are used to read and write information in the control and status registers, as well as its data locations. Commands are sent from the system to the gauge via the I2C serial communications engine, and can be executed during application development, system manufacture, or end-equipment operation.

The integrated End-of-Service (EOS) Determination function is specifically intended for applications where the battery is rarely discharged, such as in eCall systems, uninterruptible power supplies (UPS), enterprise server backup systems, and telecommunications backup modules. In such systems, the battery may remain in a fully (or near-fully) charged state for much of its lifetime, with it rarely or never undergoing a significant discharge. If the health of the battery in such a system is not monitored regularly, then it may degrade beyond the level required for a system backup/discharge event, and thus fail precisely at the time when it is needed most.

The EOS Determination function monitors the health of the battery through the use of infrequent learning phases, which involve a controlled discharge of ~1% capacity, and provides an alert to the system when the battery is approaching the end of its usable service. By coordinating battery charging with the learning phases, the battery capacity available to the system can be maintained above a preselected level, which helps to avoid compromising the battery's ability to support a system discharge event.

NOTE

The following sections offer a brief overview of the content available in the bq34210-Q1 Technical Reference Manual (TRM, SLUUBE8), and should be used only as references to the respective sections in the TRM for full details.