SLUSBK2I October   2013  – March 2022 BQ76920 , BQ76930 , BQ76940

PRODMIX  

  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 Versions
    2. 6.2 BQ76920 Pin Diagram
    3. 6.3 BQ76930 Pin Diagram
    4. 6.4 BQ76940 Pin Diagram
  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
    6. 7.6 Timing Requirements
    7. 7.7 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 Subsystems
        1. 8.3.1.1 Measurement Subsystem Overview
          1. 8.3.1.1.1 Data Transfer to the Host Controller
          2. 8.3.1.1.2 14-Bit ADC
            1. 8.3.1.1.2.1 Optional Real-Time Calibration Using the Host Microcontroller
          3. 8.3.1.1.3 16-Bit CC
          4. 8.3.1.1.4 External Thermistor
          5. 8.3.1.1.5 Die Temperature Monitor
          6. 8.3.1.1.6 16-Bit Pack Voltage
          7. 8.3.1.1.7 System Scheduler
        2. 8.3.1.2 Protection Subsystem
          1. 8.3.1.2.1 Integrated Hardware Protections
          2. 8.3.1.2.2 Reduced Test Time
        3. 8.3.1.3 Control Subsystem
          1. 8.3.1.3.1 FET Driving (CHG AND DSG)
            1. 8.3.1.3.1.1 High-Side FET Driving
          2. 8.3.1.3.2 Load Detection
          3. 8.3.1.3.3 Cell Balancing
          4. 8.3.1.3.4 Alert
          5. 8.3.1.3.5 Output LDO
        4. 8.3.1.4 Communications Subsystem
    4. 8.4 Device Functional Modes
      1. 8.4.1 NORMAL Mode
      2. 8.4.2 SHIP Mode
    5. 8.5 Register Maps
      1. 8.5.1 Register Details
      2. 8.5.2 Read-Only Registers
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Device Timing
      2. 9.1.2 Random Cell Connection
      3. 9.1.3 Power Pin Diodes
      4. 9.1.4 Alert Pin
      5. 9.1.5 Sense Inputs
      6. 9.1.6 TSn Pins
      7. 9.1.7 Unused Pins
      8. 9.1.8 Configuring Alternative Cell Counts
    2. 9.2 Typical Applications
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Step-by-Step 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 Third-Party Products Disclaimer
    2. 12.2 Documentation Support
    3. 12.3 Related Links
    4. 12.4 Receiving Notification of Documentation Updates
    5. 12.5 Trademarks
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

7.3 Recommended Operating Conditions

Over-operating free-air temperature range (unless otherwise noted). See Section 9.1.8 for more information on cell configurations. All voltages are relative to VSS, except "Cell input differential."
MINTYPMAXUNIT
VBATSupply voltage(BAT–VSS)BQ76920625V
(BAT–VC5x), (VC5x–VSS)BQ76930
(BAT–VC10x), (VC10x–VC5x), (VC5x–VSS)BQ76940
VINInput voltageCell input pins, differential (VCn–VCn–1) where n = 1..15/10/5 (BQ76940/BQ76930/BQ76920, respectively), in-use cells only25V
(VCn–VSS) where n = 1..5BQ7692005 × nV
(VCn–VSS) where n = 1..5, (VCn–VC5x) where n = 6..10BQ76930
(VCn–VSS) where n = 1..5, (VCn–VC5x) where n = 6..10, (VCn–VC10x) where n = 11..15BQ76940
SRP–1010mV
(VC0–VSS)BQ76920
(VC0–VSS), (VC5b–VC5x)BQ76930
(VC0–VSS), (VC5b–VC5x), (VC10b–VC10x)BQ76940
SRN–200200mV
SCL, SDA03.6V
(TS1–VSS)BQ76920
(TS1–VSS), (TS2–VC5x)BQ76930
(TS1–VSS), (TS2–VC5x), (TS3–VC10x)BQ76940
REGSRC625
VOUTOutput voltageCHG, DSG016V
REGOUT, ALERT03.6V
(CAP1–VSS)BQ76920
(CAP1–VSS), (CAP2–VC5x)BQ76930
(CAP1–VSS), (CAP2–VC5x), (CAP3–VC10x)BQ76940
ICBCell balancing current (internal, per cell)BQ76920050mA
BQ76930, BQ7694005mA
RCExternal cell input resistanceBQ76920401001KΩ
BQ76930, BQ769405001K1KΩ
CCExternal cell input capacitance0.1110µF
RfExternal supply filter resistance401001KΩ
CfExternal supply filter capacitance11040µF
RFILTSense resistor filter resistance1001KΩ
RALERTALERT pin to VSS resistor1MΩ
CLREGOUT loading capacitance14.7µF
CCAPREGSRC, CAP1, CAP2, and CAP3 output capacitance1µF
RTSExternal thermistor nominal resistance (103AT) at 25°C10KΩ
TOPROperating free-air temperature–4085°C