SLUSBU9I March   2014  – August 2024 BQ2970 , BQ2971 , BQ2972 , BQ2973

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
    1. 5.1 Pin Descriptions
      1. 5.1.1 Supply Input: BAT
      2. 5.1.2 Cell Negative Connection: VSS
      3. 5.1.3 Voltage Sense Node: V–
      4. 5.1.4 Discharge FET Gate Drive Output: DOUT
      5. 5.1.5 Charge FET Gate Drive Output: COUT
  7. 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 DC Characteristics
    6. 6.6 Programmable Fault Detection Thresholds
    7. 6.7 Programmable Fault Detection Timer Ranges
    8. 6.8 Typical Characteristics
  8. 7 Parameter Measurement Information
    1. 7.1 Timing Charts
    2. 7.2 Test Circuits
    3. 7.3 Test Circuit Diagrams
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
    4. 8.4 Device Functional Modes
      1. 8.4.1 Normal Operation
      2. 8.4.2 Overcharge Status
      3. 8.4.3 Over-Discharge Status
      4. 8.4.4 Discharge Overcurrent Status (Discharge Overcurrent, Load Short-Circuit)
      5. 8.4.5 Charge Overcurrent Status
      6. 8.4.6 0V Charging Function Enabled
      7. 8.4.7 0V Charging Inhibit Function
      8. 8.4.8 Delay Circuit
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Performance Plots
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Related Documentation
    2. 10.2 Support Resources
    3. 10.3 Trademarks
    4. 10.4 Electrostatic Discharge Caution
    5. 10.5 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

Package Options

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

6.5 DC Characteristics

Typical Values stated where TA = 25°C and BAT = 3.6V. Min/Max values stated where TA = –40°C to 85°C, and BAT = 3V to 4.2V (unless otherwise noted)
PARAMETERTEST CONDITIONSMINTYPMAXUNIT
Current consumption
VBATDevice operating rangeBAT – VSS1.58V
BAT – V–1.528
INORMALCurrent consumption in NORMAL modeBAT = 3.8V, V– = 0V45.5µA
IPower_downCurrent consumption in power down modeBAT = V– = 1.5V0.1µA
FET Output, DOUT and COUT
VOLCharge FET low outputIOL = 30µA, BAT = 3.8V0.40.5V
VOHCharge FET high outputIOH = –30µA, BAT = 3.8V3.43.7V
VOLDischarge FET low outputIOL = 30µA, BAT = 2V0.20.5V
VOHDischarge FET high outputIOH = –30µA, BAT = 3.8V3.43.7V
Pullup Internal Resistance on V–
RV–DResistance between V– and VBATVBAT = 1.8V, V– = 0V100300550kΩ
Current sink on V–
IV–SCurrent sink on V– to VSSVBAT = 3.8V824µA
Load short detection on V–
VshortShort detection voltageVBAT = 3.8V and RPackN = 2.2kΩVBAT – 1VV
0V battery charge function
V0CHG0V battery charging start voltage0V battery charging function allowed1.7V
0V battery charge inhibit function
V0INH0V battery charging inhibit voltage threshold0V battery charging function disallowed0.75V