SLUSBU9H March   2014  – June 2021 BQ2970 , BQ2971 , BQ2972 , BQ2973

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1. 6.1 Pin Descriptions
      1. 6.1.1 Supply Input: BAT
      2. 6.1.2 Cell Negative Connection: VSS
      3. 6.1.3 Voltage Sense Node: V–
      4. 6.1.4 Discharge FET Gate Drive Output: DOUT
      5. 6.1.5 Charge FET Gate Drive Output: COUT
  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 DC Characteristics
    6. 7.6 Programmable Fault Detection Thresholds
    7. 7.7 Programmable Fault Detection Timer Ranges
    8. 7.8 Typical Characteristics
  8. 8 Parameter Measurement Information
    1. 8.1 Timing Charts
    2. 8.2 Test Circuits
    3. 8.3 Test Circuit Diagrams
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
    4. 9.4 Device Functional Modes
      1. 9.4.1 Normal Operation
      2. 9.4.2 Overcharge Status
      3. 9.4.3 Over-Discharge Status
      4. 9.4.4 Discharge Overcurrent Status (Discharge Overcurrent, Load Short-Circuit)
      5. 9.4.5 Charge Overcurrent Status
      6. 9.4.6 0-V Charging Function Enabled
      7. 9.4.7 0-V Charging Inhibit Function
      8. 9.4.8 Delay Circuit
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
      3. 10.2.3 Application Performance Plots
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Related Documentation
    2. 13.2 Support Resources
    3. 13.3 Trademarks
    4. 13.4 Electrostatic Discharge Caution
    5. 13.5 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

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

10.2.3 Application Performance Plots

GUID-BAE332A8-F7BE-4390-9560-7FFA1CA8BC7C-low.png
Orange Line (Channel 1) = Power Up Ramp on BAT Pin
Turquoise Line (Channel 2) = DOUT Gate Drive Output
DOUT goes from low to high when UVP Recovery = UVP Set Threshold +100 mV
Figure 10-2 UVP Recovery
GUID-81B1E060-7D70-4F0A-852B-CF899C79AF1F-low.png
Orange Line (Channel 1) = Power Up Ramp on BAT pin
Turquoise Line (Channel 2) = DOUT Gate Drive Output
Figure 10-4 Initial Power Up, DOUT
GUID-7437D88E-14BF-43E6-8423-C3D53A59D4EB-low.png
Orange Line (Channel 1) = Power Up Ramp on BAT Pin
Turquoise Line (Channel 2) = COUT Gate Drive Output
COUT goes from high to low when OVP threshold = OVP set Threshold + set delay time
Figure 10-6 OVP Set Condition
GUID-906439F4-F618-48F9-BA34-80EBA80ECCB4-low.png
Orange Line (Channel 1) = Power Down Ramp on BAT Pin
Turquoise Line (Channel 2) = DOUT Date Drive Output
DOUT goes from high to low when UVP threshold = UVP set Threshold + set delay time
Figure 10-3 UVP Set Condition
GUID-9FEA44DA-7EF7-429F-949C-BCD1A10E598B-low.png
Orange Line (Channel 1) = Power Up Ramp on BAT Pin
Turquoise Line (Channel 2) = COUT Gate Drive Output
Figure 10-5 Initial Power Up, COUT
GUID-777CEDF3-0E82-4BCA-8114-40F3C7BA4D22-low.png
Orange Line (Channel 1) = Decrease Voltage on BAT Pin
Turquoise Line (Channel 2) = COUT Gate Drive Output
COUT goes from low to high when OVP Recovery = OVP Set Threshold –100 mV
Figure 10-7 OVP Recovery Condition