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

7.8 Typical Characteristics

GUID-682613AD-6F7B-4F05-80A7-2F2D9AC35A71-low.png
VBAT = 1.5 V
Figure 7-1 1.5-V IBAT Versus Temperature
GUID-1788F998-2AC3-4D0F-8F5E-786F5F575E6F-low.png
FOSC, Setting = 1.255 kHz
Figure 7-3 Internal Oscillator Frequency Versus Temperature
GUID-AC967FE0-63FD-4CA3-86A1-65C08C334974-low.pngFigure 7-5 0-V Charging Disallowed Versus Temperature
GUID-D3131155-E63E-44C7-80E6-E155455D2636-low.png
tOVPD, Setting = 1.25 s
Figure 7-7 OVP Detection Dely Time Versus Temperature
GUID-734FBE08-6EED-4F88-AD0F-F86A11981D5F-low.png
tUVPD, Setting = 144 ms
Figure 7-9 UVP Detection Delay Time Versus Temperature
GUID-219AC28E-10D7-4604-8C4C-39A9DAD4E24E-low.png
tOCCD, Setting = 8 ms
Figure 7-11 OCC Detection Delay Time Versus Temperature
GUID-7DDFC641-833A-4741-B8EE-9B67496DE505-low.png
tUVPD, Setting = 20 ms
Figure 7-13 OCD Detection Delay Time Versus Temperature
GUID-D01E5956-2C1B-42B4-91F1-E83F7D7A3E6B-low.pngFigure 7-15 Power On Reset Versus Temperature
GUID-9EB8CAC0-77A5-4C0D-BA97-D2EB45FE9520-low.png
VBAT, Setting = 3.9 V
Figure 7-17 DOUT Versus Temperature with Ioh = –30 µA
GUID-DB94030B-B0C1-4234-B81D-BA7281A12E6E-low.png
VBAT = 3.9 V
Figure 7-2 3.9-V IBAT Versus Temperature
GUID-5BE74DA5-608F-43C8-8320-C0552D9B8FA7-low.png
VBAT, Setting = 0 V
Figure 7-4 0-V Charging Allowed Versus Temperature
GUID-A0E93C4A-0088-4758-87A6-CAD3AD1EBB10-low.png
OVP, Setting = 4.275 V
Figure 7-6 OVP Detection Accuracy Versus Temperature
GUID-683ADE09-BFEE-4E6C-984C-803EBF76FE13-low.png
UVP, Setting = 2.800 V
Figure 7-8 UVP Detection Accuracy Versus Temperature
GUID-8A5EB4C7-E177-4441-8046-7173CF851A4E-low.png
VOCC, Setting = –100 mV
Figure 7-10 OCC Detection Accuracy Versus Temperature
GUID-D3B17AC8-84F5-46C7-A8C0-1927F9BBC94B-low.png
VOCD, Setting = 100 mV
Figure 7-12 OCD Detection Accuracy Versus Temperature
GUID-13F3554C-9771-4C35-9813-D84E289FE8C6-low.png
VSCC, Setting = 500 mV
Figure 7-14 SCC Detection Accuracy Versus Temperature
GUID-D652C582-9510-4127-880B-A09AF397AB2C-low.png
VBAT, Setting = 3.9 V
Figure 7-16 COUT Versus Temperature with Ioh = –30 µA