SLUSCB3 July   2015

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Pin Configuration and 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  Electrical Characteristics: Power Supply Control
    7. 7.7  Electrical Characteristics: AFE Power-On Reset
    8. 7.8  Electrical Characteristics: AFE Watchdog Reset and Wake Timer
    9. 7.9  Electrical Characteristics: Current Wake Comparator
    10. 7.10 Electrical Characteristics: VC1, VC2, VC3, VC4, BAT, PACK
    11. 7.11 Electrical Characteristics: SMBD, SMBC
    12. 7.12 Electrical Characteristics: PRES, BTP_INT, DISP
    13. 7.13 Electrical Characteristics: LEDCNTLA, LEDCNTLB, LEDCNTLC
    14. 7.14 Electrical Characteristics: Coulomb Counter
    15. 7.15 Electrical Characteristics: CC Digital Filter
    16. 7.16 Electrical Characteristics: ADC
    17. 7.17 Electrical Characteristics: ADC Digital Filter
    18. 7.18 Electrical Characteristics: CHG, DSG FET Drive
    19. 7.19 Electrical Characteristics: PCHG FET Drive
    20. 7.20 Electrical Characteristics: FUSE Drive
    21. 7.21 Electrical Characteristics: Internal Temperature Sensor
    22. 7.22 Electrical Characteristics: TS1, TS2, TS3, TS4
    23. 7.23 Electrical Characteristics: PTC, PTCEN
    24. 7.24 Electrical Characteristics: Internal 1.8-V LDO
    25. 7.25 Electrical Characteristics: High-Frequency Oscillator
    26. 7.26 Electrical Characteristics: Low-Frequency Oscillator
    27. 7.27 Electrical Characteristics: Voltage Reference 1
    28. 7.28 Electrical Characteristics: Voltage Reference 2
    29. 7.29 Electrical Characteristics: Instruction Flash
    30. 7.30 Electrical Characteristics: Data Flash
    31. 7.31 Electrical Characteristics: OCD, SCC, SCD1, SCD2 Current Protection Thresholds
    32. 7.32 Timing Requirements: OCD, SCC, SCD1, SCD2 Current Protection Timing
    33. 7.33 Timing Requirements: SMBus
    34. 7.34 Timing Requirements: SMBus XL
    35. 7.35 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  Primary (1st Level) Safety Features
      2. 8.3.2  Secondary (2nd Level) Safety Features
      3. 8.3.3  Charge Control Features
      4. 8.3.4  Gas Gauging
      5. 8.3.5  Configuration
        1. 8.3.5.1 Oscillator Function
        2. 8.3.5.2 System Present Operation
        3. 8.3.5.3 Emergency Shutdown
        4. 8.3.5.4 1-Series, 2-Series, 3-Series, or 4-Series Cell Configuration
        5. 8.3.5.5 Cell Balancing
      6. 8.3.6  Battery Parameter Measurements
        1. 8.3.6.1 Charge and Discharge Counting
      7. 8.3.7  Battery Trip Point (BTP)
      8. 8.3.8  Lifetime Data Logging Features
      9. 8.3.9  Authentication
      10. 8.3.10 LED Display
      11. 8.3.11 Voltage
      12. 8.3.12 Current
      13. 8.3.13 Temperature
      14. 8.3.14 Communications
        1. 8.3.14.1 SMBus On and Off State
        2. 8.3.14.2 SBS Commands
    4. 8.4 Device Functional Modes
  9. 9 Applications and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 High-Current Path
          1. 9.2.2.1.1 Protection FETs
          2. 9.2.2.1.2 Chemical Fuse
          3. 9.2.2.1.3 Lithium-Ion Cell Connections
          4. 9.2.2.1.4 Sense Resistor
          5. 9.2.2.1.5 ESD Mitigation
        2. 9.2.2.2 Gas Gauge Circuit
          1. 9.2.2.2.1 Coulomb-Counting Interface
          2. 9.2.2.2.2 Power Supply Decoupling and PBI
          3. 9.2.2.2.3 System Present
          4. 9.2.2.2.4 SMBus Communication
          5. 9.2.2.2.5 FUSE Circuitry
        3. 9.2.2.3 Secondary-Current Protection
          1. 9.2.2.3.1 Cell and Battery Inputs
          2. 9.2.2.3.2 External Cell Balancing
          3. 9.2.2.3.3 PACK and FET Control
          4. 9.2.2.3.4 Temperature Output
          5. 9.2.2.3.5 LEDs
          6. 9.2.2.3.6 Safety PTC Thermistor
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 Protector FET Bypass and Pack Terminal Bypass Capacitors
      2. 11.1.2 ESD Spark Gap
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Community Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

1 Features

  • Fully Integrated 1-Series, 2-Series, 3-Series, and 4-Series Li-Ion or Li-Polymer Cell Battery Pack Manager and Protection
  • Next-Generation Patented Impedance Track™ Technology Accurately Measures Available Charge in Li-Ion and Li-Polymer Batteries
  • High Side N-CH Protection FET Drive
  • Integrated Cell Balancing While Charging or At Rest
  • Full Array of Programmable Protection Features
    • Voltage
    • Current
    • Temperature
    • Charge Timeout
    • CHG/DSG FETs
    • AFE
  • Sophisticated Charge Algorithms
    • JEITA
    • Enhanced Charging
    • Adaptive Charging
    • Cell Balancing
  • Supports TURBO BOOST Mode
  • Supports Battery Trip Point (BTP)
  • Diagnostic Lifetime Data Monitor and Black Box Recorder
  • LED Display
  • Supports Two-Wire SMBus v1.1 Interface
  • SHA-1 Authentication
  • Compact Package: 32-Lead QFN (RSM)

2 Applications

  • Notebook/Netbook PCs
  • Medical and Test Equipment
  • Portable Instrumentation

3 Description

The bq40z50-R1 device, incorporating patented Impedance Track™ technology, is a fully integrated, single-chip, pack-based solution that provides a rich array of features for gas gauging, protection, and authentication for 1-series, 2-series, 3-series, and 4-series cell Li-Ion and Li-Polymer battery packs.

Using its integrated high-performance analog peripherals, the bq40z50-R1 device measures and maintains an accurate record of available capacity, voltage, current, temperature, and other critical parameters in Li-Ion or Li-Polymer batteries, and reports this information to the system host controller over an SMBus v1.1 compatible interface.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
bq40z50-R1 VQFN (32) 4.00 mm × 4.00 mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.

Simplified Schematic

bq40z50-R1 Simp_Schematic.gif