SLUSAM9E July   2011  – April 2020 BQ76925

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Schematic
  4. 4 Revision History
  5. 5 Description (Continued)
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 7 Specifications
    1. 7.1  Absolute Maximum Ratings
    2. 7.2  ESD Ratings
    3. 7.3  Recommended Operating Conditions
    4. 7.4  Thermal Information
    5. 7.5  Electrical Characteristics: Supply Current
    6. 7.6  Internal Power Control (Startup and Shutdown)
    7. 7.7  3.3-V Voltage Regulator
    8. 7.8  Voltage Reference
    9. 7.9  Cell Voltage Amplifier
    10. 7.10 Current Sense Amplifier
    11. 7.11 Overcurrent Comparator
    12. 7.12 Internal Temperature Measurement
    13. 7.13 Cell Balancing and Open Cell Detection
    14. 7.14 I2C Compatible Interface
    15. 7.15 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Internal LDO Voltage Regulator
      2. 8.3.2 ADC Interface
        1. 8.3.2.1 Reference Voltage
          1. 8.3.2.1.1 Host ADC Calibration
        2. 8.3.2.2 Cell Voltage Monitoring
          1. 8.3.2.2.1 Cell Amplifier Headroom Under Extreme Cell Imbalance
          2. 8.3.2.2.2 Cell Amplifier Headroom Under BAT Voltage Drop
        3. 8.3.2.3 Current Monitoring
        4. 8.3.2.4 Overcurrent Monitoring
        5. 8.3.2.5 Temperature Monitoring
          1. 8.3.2.5.1 Internal Temperature Monitoring
      3. 8.3.3 Cell Balancing and Open Cell Detection
    4. 8.4 Device Functional Modes
      1. 8.4.1 Power Modes
        1. 8.4.1.1 POWER ON RESET (POR)
        2. 8.4.1.2 STANDBY
        3. 8.4.1.3 SLEEP
    5. 8.5 Programming
      1. 8.5.1 Host Interface
        1. 8.5.1.1 I2C Addressing
        2. 8.5.1.2 Bus Write Command to BQ76925
        3. 8.5.1.3 Bus Read Command from BQ76925 Device
    6. 8.6 Register Maps
      1. 8.6.1 Register Descriptions
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Recommended System Implementation
        1. 9.1.1.1 Voltage, Current, and Temperature Outputs
        2. 9.1.1.2 Power Management
        3. 9.1.1.3 Low Dropout (LDO) Regulator
        4. 9.1.1.4 Input Filters
        5. 9.1.1.5 Output Filters
      2. 9.1.2 Cell Balancing
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

7.9 Cell Voltage Amplifier

PARAMETER TEST CONDITION MIN TYP MAX UNIT
GVCOUT Cell voltage amplifier gain Measured from VCn
to VCOUT		 REF_SEL = 0 –1.6% 0.3 1.5%
REF_SEL = 1 –1.6% 0.6 1.5%
OVCOUT Cell voltage amplifier offset Measured from VCn to VCOUT –16 15 mV
VCOUT Cell voltage amp output range (1) Measured at VCOUT,
VCn = 5 V		 REF_SEL = 0 1.47 1.5 1.53 V
REF_SEL = 1 2.94 3 3.06 V
Measured at VCOUT,
VCn = 0 V		 0 V
∆VCOUT Cell voltage amplifier accuracy VCn = 1.4 V to 4.4 V,
After correction, (2)
Measured at VCOUT (3)
REF_SEL = 1(4) 		TA = 25°C –3 3 mV
TA = 0°C to 50°C –5 5
TA = –25°C to +85°C –8 8
IVCOUT VCOUT output current(5) 10 µA
tVCOUT Delay from VCn select to VCOUT Output step of 200 mV, COUT = 0.1 µF 100 µs
(1) For VCn values greater than 5 V, VCOUT clamps at approximately V3P3.
(2) Correction factor determined at final test and stored in non-volatile storage. Correction is applied by Host controller.
(3) Output referred. Input referred accuracy is calculated as ∆VCOUT / GVCOUT (for example, 3 / 0.6 = 5).
(4) Correction factors are calibrated for gain of 0.6. Tolerance at gain of 0.3 is approximately doubled. Contact TI for information on devices calibrated to a gain of 0.3.
(5) Max DC load for specified accuracy.