SLVSHX5A July   2025  – December 2025 TPS2HC08-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
  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 SNS Timing Characteristics
    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 Feature Description
      1. 8.3.1  Accurate Current Sense
        1. 8.3.1.1 SNS Response Time
        2. 8.3.1.2 SNS Output Filter
        3. 8.3.1.3 Multiplexing of Current Sense Across Channels
        4. 8.3.1.4 Multiplexing of Current Sense Across Devices
      2. 8.3.2  Overcurrent Protection
        1. 8.3.2.1 Adjustable Current Limit
          1. 8.3.2.1.1 Current Limiting With Thermal Regulation
          2. 8.3.2.1.2 Current Limiting With No Thermal Regulation
          3. 8.3.2.1.3 Current Limit Foldback
          4. 8.3.2.1.4 Current Limit Accuracy
        2. 8.3.2.2 Thermal Shutdown
          1. 8.3.2.2.1 Relative Thermal Shutdown
          2. 8.3.2.2.2 Absolute Thermal Shutdown
      3. 8.3.3  Retry Protection Mechanism From Thermal Shutdown
        1. 8.3.3.1 Reliable Switch-On Behavior
      4. 8.3.4  Inductive-Load Switching-Off Clamp
      5. 8.3.5  Slower Slew Rate Option
      6. 8.3.6  Capacitive Load Charging
        1. 8.3.6.1 Adjustable Current Limiting for Inrush Control
        2. 8.3.6.2 Current Limit with Thermal Regulation for Capacitive Loads
        3. 8.3.6.3 Retry Thermal Shutdown Behavior for Capacitive Loads
        4. 8.3.6.4 Impact of DC Load on Capacitive Charging Capability
        5. 8.3.6.5 Device Capability
      7. 8.3.7  Bulb Charging
        1. 8.3.7.1 Non-Thermal Regulated Mode for Bulb Loads
        2. 8.3.7.2 Thermal Management During Bulb Inrush
        3. 8.3.7.3 Device Capability
      8. 8.3.8  Fault Detection and Reporting
        1. 8.3.8.1 Diagnostic Enable Function
        2. 8.3.8.2 FLT Reporting
        3. 8.3.8.3 FLT Timings
        4. 8.3.8.4 Fault Table
      9. 8.3.9  Full Diagnostics
        1. 8.3.9.1 Open-Load Detection
          1. 8.3.9.1.1 Channel On
          2. 8.3.9.1.2 Channel Off
        2. 8.3.9.2 Short-to-Battery Detection
        3. 8.3.9.3 Reverse-Polarity and Battery Protection
      10. 8.3.10 Full Protections
        1. 8.3.10.1 UVLO Protection
        2. 8.3.10.2 Loss of GND Protection
        3. 8.3.10.3 Loss of Power Supply Protection
        4. 8.3.10.4 Reverse Current Protection
        5. 8.3.10.5 Protection for MCU I/Os
    4. 8.4 Device Functional Modes
  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 EMC Transient Disturbances Test
      3. 9.2.3 Transient Thermal Performance
      4. 9.2.4 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Examples
        1. 9.4.2.1 Without a GND Network
        2. 9.4.2.2 With a GND Network
      3. 9.4.3 Wettable Flank Package
  11. 10Device and Documentation Support
    1. 10.1 Third-Party Products Disclaimer
    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

8.1 Overview

The TPS2HC08-Q1 is a dual-channel, fully-protected, high side power switch with integrated NMOS power FETs and charge pump. Full diagnostics and high-accuracy current-sense features enable intelligent control of the load. The device offers two pins to support both digital status and analog current-sense output. The current-sense output can be set to high-impedance state when diagnostics are disabled, which can enable multiplexing of the MCU analog interface between multiple devices.

The device has dedicated logic pins to enable each of the two channels and a separate DIAG_EN pin to enable the diagnostic output. The SEL pin allows to select the channel to be output on the analog current sense (SNS) pin. The device also implements a global FLT pin with an open-drain structure, to be used as an interrupt to the MCU. When a fault condition occurs, the pin is pulled down to GND. An external pullup is required to match the microcontroller supply level.

High-accuracy current sensing allows for better real-time monitoring and more-accurate diagnostics without additional in-line calibration. A current mirror is used to source 1 / KSNS of the load current, which is reflected as voltage across a resistor on the SNS pin. The SNS pin can also report a fault by sourcing a current of ISNSFH out of the SNS pin. During fault the SNS pin voltage is represented by ISNSFH × RSNS . If this voltage violates the acceptable voltage range of the MCU ADC, an external Zener diode or resistor divider on the SNS pin has to be connected.

The device also offers a programmable current-limit function which greatly improves the reliability of the whole system by clamping the inrush current effectively at start-up when charging large capacitances or during short-circuit conditions. The high-accuracy current limit of the device can be set using an external resistor between 7.5A to 25A. The device also offers current limit settings with and without thermal regulation. The thermal regulated current limit can be useful when charging large capacitors at startup. The current limit setting without thermal regulation is useful for loads such high motor stall currents or bulb loads.

A voltage clamp is built in to address switching off the energy of inductive loads, such as relays, solenoids, pumps, motors, and so forth. With the benefits of process technology and excellent IC layout, the TPS2HC08-Q1 device can achieve excellent power dissipation capacity, which can help save the external free-wheeling circuitry in most cases. For more details, see Inductive-Load Switching-Off Clamp.

The TPS2HC08-Q1 device can be used as a high side power switch for a wide variety of resistive, inductive, and capacitive loads, including bulbs, LEDs, relays, solenoids, and heaters.