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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8.4.1.1.2 Overcurrent Protection - Steady State Operation
After the device has completed the optional inrush period (if enabled) the device will enter the steady operation. In this operation, the overcurrent protection is provided by the immediate shutdown overcurrent protection (IOCP) and I2T protection (if enabled). The IOCP is an overcurrent protection function that immediately turns off the channel if the output current exceeds IOCP threshold that is set by the ILIMIT_SET_CHx [3:0] bits. The IOCP function can not be disabled and is always active in the steady state operation while the device is enabled. The I2T protection provides a programmable fuse protection that is based on a defined time-current curve. The intent of the I2T protection is to match the behavior of a melting fuse. The time-current curve of the I2T protection can be set through the NOM_CUR_CHx [2:0] bits and I2T_TRIP_CHx [3:0] bits. The ISWCL_CHx [1:0] and IOCP also help to define the time-current curve for the I2T protection. The IOCP and I2T protection (if enabled) are active in the ACTIVE state and the LIMP_HOME state if the channel is in the steady state operation after the inrush period.

The next sections describes the I2T protection and the IOCP protection.