SLVSHR0 May   2025 TPS2HCS08-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
    1. 5.1 A Version Package
    2. 5.2 Pinout - Version A
    3. 5.3 Version B Package
    4. 5.4 Pinout - Version B
  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 Electrical Characteristics
    6. 6.6 SPI Timing Requirements
    7. 6.7 Switching Characteristics
    8. 6.8 Typical Characteristics
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Device Functional Modes
      1. 8.3.1 State Diagram
      2. 8.3.2 Output Control
      3. 8.3.3 SPI Mode Operation
      4. 8.3.4 Fault Reporting
      5. 8.3.5 SLEEP
      6. 8.3.6 CONFIG/ACTIVE
      7. 8.3.7 LIMP_HOME State (Version A only)
      8. 8.3.8 Battery Supply Input (VBB) Under-voltage
      9. 8.3.9 LOW POWER MODE (LPM) States
        1. 8.3.9.1 MANUAL_LPM State
        2. 8.3.9.2 AUTO_LPM State
    4. 8.4 Feature Description
      1. 8.4.1 Protection Mechanisms
        1. 8.4.1.1 Overcurrent Protection
          1. 8.4.1.1.1 Inrush Period - Overcurrent Protection
          2. 8.4.1.1.2 Overcurrent Protection - Steady State Operation
          3. 8.4.1.1.3 Programmable Fuse Protection
          4. 8.4.1.1.4 Immediate Shutdown Overcurrent Protection (IOCP)
          5. 8.4.1.1.5 Auto Retry and Latch-off Behavior
        2. 8.4.1.2 Thermal Shutdown
        3. 8.4.1.3 Reverse Battery
      2. 8.4.2 Diagnostic Mechanisms
        1. 8.4.2.1 Integrated ADC
        2. 8.4.2.2 Digital Current Sense Output
        3. 8.4.2.3 Output Voltage Measurement
        4. 8.4.2.4 MOSFET Temperature Measurement
        5. 8.4.2.5 Drain-to-Source Voltage (VDS) Measurement
        6. 8.4.2.6 VBB Voltage Measurement
        7. 8.4.2.7 VOUT Short-to-Battery and Open-Load
          1. 8.4.2.7.1 Measurement With Channel Output (FET) Enabled
          2. 8.4.2.7.2 Detection With Channel Output Disabled
    5. 8.5 Parallel Mode Operation
    6. 8.6 TPS2HCS08 Registers
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Thermal Considerations
        2. 9.2.2.2 Configuring the Capacitive Charging Mode
      3. 9.2.3 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

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8.4.2.6 VBB Voltage Measurement

The TPS2HCS08-Q1 provides a VBB voltage measurement through the 10-bit ADC.

The VBB voltage measurement is disabled by default. The VBB voltage sense function can be enabled through the ADC_VBB_DIS bit in the ADC_CONFIG register.

The conversion equation for the VBB voltage measurement is detailed in Equation 13. The ADC measurement result will be available in the ADC_RESULT_VBB register. The VBB_RDY bit is set to 1 if a new ADC conversion result exists since the register was last read. If any of the channels are in the I2T loop (I2T_MOD_CHx = 1), the VBB voltage measurement, if enabled, will be disabled and the VBB_RDY bit will be 0. Once the channel(s) exit the I2T loop (I2T_MOD_CHx = 0), then the VBB voltage measurement will be automatically re-enabled if previously enabled before the I2T event.

Equation 13. V B B   ( V ) =   18.18   ×   V A D C R E F H I 1023   ×   1.667 ×   A D C _ R E S U L T _ V B B

The VBB voltage measurement is referenced to the device ground so if there is a ground network used for reverse battery then there can be an offset in the voltage measurement.