SLUSAW3D December 2014  – January 2017

PRODUCTION DATA. 

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Description (continued)
  6. Pin Configuration and Functions
  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 Supply Voltage
    6. 7.6 Supply Current
    7. 7.7 Power Supply Control
    8. 7.8 Low-Voltage General Purpose I/O (TSx)
    9. 7.9 High-Voltage General Purpose I/O (GPIO0, GPIO1)
    10. 7.10AFE Power-On Reset
    11. 7.11 Internal 1.8-V LDO
    12. 7.12Current Wake Comparator
    13. 7.13Coulomb Counter
    14. 7.14CC Digital Filter
    15. 7.15ADC
    16. 7.16ADC Digital Filter
    17. 7.17ADC Multiplexer
    18. 7.18Cell Balancing Support
    19. 7.19Cell Detach Detection
    20. 7.20Internal Temperature Sensor
    21. 7.21NTC Thermistor Measurement Support (ADCx)
    22. 7.22High-Frequency Oscillator
    23. 7.23Low-Frequency Oscillator
    24. 7.24Voltage Reference 1
    25. 7.25Voltage Reference 2
    26. 7.26Instruction Flash
    27. 7.27Data Flash
    28. 7.28Current Protection Thresholds
    29. 7.29N-CH FET Drive (CHG, DSG)
    30. 7.30FUSE Drive (AFEFUSE)
    31. 7.31Battery Charger Voltage Regulation (VFB)
    32. 7.32Battery Charger Current Sense (HSRP, HSRN)
    33. 7.33Battery Charger Precharge Current Sense (HSRP, HSRN)
    34. 7.34AC Adapter Fault Detect (HSRN, VCC)
    35. 7.35Battery Charger Overcurrent Detection (V)HSRP, (V)HSRN
    36. 7.36Battery Charger Undercurrent Detection (V)HSRP, (V)HSRN
    37. 7.37System Operation Detection (V)HSRN
    38. 7.38Battery Overvoltage Comparator (VFB)
    39. 7.39Regulator (REGN)
    40. 7.40PWM High-Side Driver (HiDRV)
    41. 7.41PWM Low-Side Driver (LoDRV)
    42. 7.42PWM Information
    43. 7.43Charger Power-Up Sequence
    44. 7.44Thermal Shutdown Comparator
    45. 7.45SMBus High Voltage I/O
    46. 7.46SMBus
    47. 7.47SMBus XL
    48. 7.48Timing Requirements
    49. 7.49Typical Characteristics
  8. Detailed Description
    1. 8.1Overview
    2. 8.2Functional Block Diagram
    3. 8.3Feature Description
      1. 8.3.1 Safety Features
      2. 8.3.2 Analog Front End (AFE) Details
        1. 8.3.2.1Wake Up Comparator
        2. 8.3.2.2Cell Balancing Support
        3. 8.3.2.3 FET Drive
        4. 8.3.2.4Fuse Drive
      3. 8.3.3 Charge Controller Details
        1. 8.3.3.1Precharge Modes
        2. 8.3.3.2Zero-Volt Charge Support
        3. 8.3.3.3Charge Termination
      4. 8.3.4 Fuel Gauge and Control Details
        1. 8.3.4.1Battery Trip Point (BTP)
        2. 8.3.4.2Lifetime Data Logging Features
      5. 8.3.5 Authentication
      6. 8.3.6 LED Display
      7. 8.3.7 Internal Temperature Sensor
      8. 8.3.8 External Temperature Sensor Support
      9. 8.3.9 High Frequency Oscillator
      10. 8.3.10Communications
        1. 8.3.10.1SMBus On and Off State
        2. 8.3.10.2SBS Commands
  9. Application and Implementation
    1. 9.1Application Information
    2. 9.2Typical Applications
      1. 9.2.1Design Requirements
      2. 9.2.2Detailed Design Procedure
        1. 9.2.2.1Inductor Selection
        2. 9.2.2.2Input Capacitor
        3. 9.2.2.3Output Capacitor
        4. 9.2.2.4Power MOSFETs Selection
        5. 9.2.2.5Input Filter Design
      3. 9.2.3Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1Layout Guidelines
      1. 11.1.1PCB Layout
    2. 11.2Layout Example
  12. 12Device and Documentation Support
    1. 12.1Related Documentation
    2. 12.2Community Resources
    3. 12.3Trademarks
    4. 12.4Electrostatic Discharge Caution
    5. 12.5Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Features

  • Fully Integrated 2-Series to 4-Series Cell Li-Ion or Li-Polymer Battery Management Unit
  • Input Voltage Range on Pack+: 2.5 V to 25 V
  • Battery Charger Efficiency > 92%
  • Battery Charger Operation Range: 4 V to 25 V
  • Battery Charger, 1-MHz Synchronous Buck Controller for External NFETs
    • Soft Start to Limit In-Rush Current
    • Current Limit Protection for External Switches
    • Programmable Charging
      • Supports JEITA/Enhanced Charging Modes
  • Fuel Gauging
    • High Resolution 16-Bit Integrator for Coulomb Counter
    • ADC, 16-Bit for Precision V, I, and T Measurements with 16-Channel Multiplexer
    • Support for Simultaneous CC and ADC Sampling (Power Conversion)
    • Supports Two-Wire SMBus v2.0 Interface with Accelerated 400-kHz Programming Option
    • SHA-1 Hash Message Authentication Code (HMAC) Responder for Increased Battery Pack Security
      • Split Key (2 × 64) Stored in Secure Memory
    • Supports Field Updates
  • AFE Protection
    • Programmable Current Protection
      • Overcurrent in Discharge
      • Short-Circuit Current in Charge
      • Short-Circuit Current in Discharge
  • N-FET High-Side Protection FET Drive
  • Support for Four LEDs
  • Thermistor inputs for NTC
  • Compact 32-Pin QFN Package (RHB)

Applications

  • Notebooks, Ultrabooks, Netbooks, Tablets, UMPCs
  • Medical and Test Equipment
  • Portable Instrumentation

Description

The Texas Instruments bq40z60 device is a Programmable Battery Management Unit that integrates battery charging control output, gas gauging, and protection for completely autonomous operation of 2-series to 4-series cell Li-Ion and Li-Polymer battery packs. The architecture enables internal communication between the fuel gauging processor and battery charger controller to optimize the charging profile based on the external load conditions and power path source management during load transients and adaptor current limitations in the system. The charging current efficiency is scalable for power transfer based on the external components, such as the NFETs, inductor, and sensing resistor.

Device Information(1)

PART NUMBER PACKAGEBODY SIZE (NOM)
bq40z60VQFN (32) 5.00 mm × 5.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Simplified Schematic

bq40z60 Simp_schematic.gif