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  • BQ41Z90 Highly Integrated 3–16 Cell Battery Fuel Gauge with IT-DZT Algorithm and ECC Authentication

    • SLUSFQ1A December   2024  – December 2024 BQ41Z90

      ADVANCE INFORMATION  

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  • BQ41Z90 Highly Integrated 3–16 Cell Battery Fuel Gauge with IT-DZT Algorithm and ECC Authentication
  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions:
  6. 5 Pin Equivalent Diagrams
  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  Supply Current
    6. 6.6  Power Selector
    7. 6.7  Current Wake Detector
    8. 6.8  General Purpose Input-Outputs
    9. 6.9  Aux REGOUT LDO
    10. 6.10 LD Pin
    11. 6.11 Shelf Timer
    12. 6.12 Cell Balancing
    13. 6.13 Comparator-Based Detections (SCOMP)
    14. 6.14 SCOMP Timing Requirements
    15. 6.15 SCD Comparator
    16. 6.16 High-side NFET Drivers (CHG and DSG and PCHG and PDSG)
    17. 6.17 FUSE Pin
    18. 6.18 Flash Memory
    19. 6.19 Interface I/O
    20. 6.20 I2C Interface Timing
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Device Functional Modes
        1. 7.3.1.1 Analog Front End (AFE)
        2. 7.3.1.2 Power Management
          1. 7.3.1.2.1 Power Mode Block Configuration
          2. 7.3.1.2.2 Power Supply Control
            1. 7.3.1.2.2.1 HIBERNATE Mode
            2. 7.3.1.2.2.2 SHUTDOWN Mode
            3. 7.3.1.2.2.3 SHELF Mode
            4. 7.3.1.2.2.4 Wake Functionality
          3. 7.3.1.2.3 Power Management Unit
            1. 7.3.1.2.3.1 PMU Overview
          4. 7.3.1.2.4 Thermal Shutdown
          5. 7.3.1.2.5 Low Drop Out Regulators (LDOs)
            1. 7.3.1.2.5.1 REG18
            2. 7.3.1.2.5.2 REG135
            3. 7.3.1.2.5.3 REGIO
            4. 7.3.1.2.5.4 REGOUT
        3. 7.3.1.3 Reset Management
          1. 7.3.1.3.1 RST_SD Pin Operation
          2. 7.3.1.3.2 AFE Watchdog
        4. 7.3.1.4 Diagnostics Features
        5. 7.3.1.5 Internal Oscillators
          1. 7.3.1.5.1 Low Frequency Oscillator (LFO)
          2. 7.3.1.5.2 High Frequency Oscillator (HFO)
          3. 7.3.1.5.3 Low Power Oscillator (LPO)
      2. 7.3.2 Temperature Measurement
        1. 7.3.2.1 External Temperature Measurement Support
        2. 7.3.2.2 Internal Temperature Sensor
      3. 7.3.3 Random Cell Connection Support
        1. 7.3.3.1 Usage of VC Pins for Cells Versus Interconnect
        2. 7.3.3.2 Unused Pins
      4. 7.3.4 Cell Balancing Support
        1. 7.3.4.1 Open Wire Detection
      5. 7.3.5 Protection and Charge Control Outputs
        1. 7.3.5.1 High-Side NFET Drivers
        2. 7.3.5.2 PRECHARGE and PREDISCHARGE Modes
        3. 7.3.5.3 FET Configuration
        4. 7.3.5.4 CFETOFF, DFETOFF Pin Functionality
        5. 7.3.5.5 DDSG and DCHG Pin Operation
        6. 7.3.5.6 Hardware Fault Detection (SCOMP and SCD)
        7. 7.3.5.7 FET UVLO Protection
        8. 7.3.5.8 Fuse Drive
      6. 7.3.6 Load Detect Functionality
      7. 7.3.7 MCU Peripherals
        1. 7.3.7.1 General Purpose and Special Function I/O
          1. 7.3.7.1.1 Low Voltage RAx I/O
          2. 7.3.7.1.2 Low Voltage RCx I/O
          3. 7.3.7.1.3 Constant Current Sink I/O
        2. 7.3.7.2 Communication Interfaces
          1. 7.3.7.2.1 I2C Interface
          2. 7.3.7.2.2 SMBus Interface
        3. 7.3.7.3 Authentication Support
          1. 7.3.7.3.1 ECC Authentication
          2. 7.3.7.3.2 SHA-1 Support
          3. 7.3.7.3.3 SHA-2 Support
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Design Requirements
  10. 9 Power Supply Recommendations
  11. 10Device and Documentation Support
    1. 10.1 Third-Party Products Disclaimer
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 Receiving Notification of Documentation Updates
    4. 10.4 Support Resources
    5. 10.5 Trademarks
    6. 10.6 Electrostatic Discharge Caution
    7. 10.7 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information
  14. IMPORTANT NOTICE

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • PVP|64
Thermal pad, mechanical data (Package|Pins)
Orderable Information
  • slusfq1a_oa
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Data Sheet

BQ41Z90 Highly Integrated 3–16 Cell Battery Fuel Gauge with IT-DZT Algorithm and ECC Authentication

1 Features

  • Highly integrated battery pack manager for 3 to 16 cells in series applications
    • Ultra-low power 32-bit RISC processor
    • ADC measurements for up to 16 cells in series with 80V tolerance
    • High Accuracy SoC and SoH with Dynamic Z Track™ gauging algorithm
    • Certificate-based security protected flash memory
  • Precision analog front end with two independent ADCs:
    • High-accuracy 18-bit integrating delta-sigma coulomb counter
    • High-accuracy 16-bit delta-sigma with input translation and multiplexer
    • Support for simultaneous current and voltage sampling
    • Supports up to eight external thermistor measurements and an internal temperature sensor
  • Strong High-side NMOS FET drive with fast turn-on and turn-off time
  • Charge pump support for pre-charge and pre-discharge NMOS FET drivers
  • Parallel configuration support for removable battery with separate charger and system ports
  • Cell balancing support up to 50mA bypass per cell
  • Diagnostic lifetime data monitor and recorder
  • Multiple host communication support:
    • I2C (up to 1MHz )
    • SMBus 3.2 (up to 1MHz)
  • Multiple power modes for low quiescent current operation
  • SHA-1, SHA-2, or EC-KCDSA authentication for robust battery pack security

2 Applications

  • Battery backup unit (BBU)
  • E-bike, e-scooter, and LEV
  • Handheld vacuum cleaners and vacuum robots
  • Gardening robots and power tools
  • Drones
  • Medical and test equipment
  • Other industrial battery pack

3 Description

The Texas Instruments BQ41Z90 is a fully integrated pack-based battery pack manager solution, that provides a flash programmable CPU, safety protection, and elliptical curve cryptography (ECC) authentication for 3 to 16 cells in series Li-ion, LiFeP4, NiMH, and Li-polymer battery packs.

The BQ41Z90 battery pack manager communicates through SMBus v3.2 or I2C-compatible interfaces, and combines an ultra-low-power, high-speed 32-bit processor, high-accuracy analog measurement capabilities, integrated flash memory, an array of peripheral IO, an NMOS protection FET drive, and a SHA-1, SHA-2, or EC-KCDSA authentication responder into a complete, high-performance battery management solution.

Package Information
PART NUMBERPACKAGE (1)BODY SIZE (NOM)
BQ41Z90 RSNPVP (64)7.00mm × 7.00mm
(1) For more information, see Mechanical, Packaging, and Orderable Information.
BQ41Z90 Simplified Schematic Simplified Schematic

 
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